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Integrated Grain Heat Pump Dryer

Product Description

Model: AHRZ 1450-U-ZD/AHRZ 2550-U-ZD

Power: 37P/50P

Type: Grain dryer

Structure: Integrated structure

The way of wind out: underfloor air supply

Control screen: 7-inch control screen, computer intelligent control

Machine features: Safe operation, high efficiency, energy saving, environmental protection, unattended, precise temperature control, high quality and worry-free

Application field: it is specially used for drying grains, coffee beans, wheat, corn, soybeans, etc.

Heat Pump Dryer Special for Pet Feed

Product Description

Model: DL-RFX-3P/DL-RFG-3P/DL-RFS-6P/DL-RFS-12P

Power: 6P/12P

Type: Pet feed drying

Structure: Integrated structure

Control screen: 7-inch control screen, computer intelligent control

Machine features: It can simulate cold air which generated in winter weather conditions for drying, with high degree of automation. The production environment is very clean, and labor cost can save a lot.

Application field: it is suitable for drying all kinds of pet snacks: such as capelin fish, beef knee bone, duck neck, meat bones, meat cubes, steak slices, beef strips, duck strips, cheese bone wrapped meat, cowhide foam ring (molar ring) , Pet supplies, cowhide rolls, chicken/duck cowhide doughnuts, cowhide bones, molar sticks, chicken sticks, dog snacks, chicken pigskin sticks, dog chews, etc.

Integrated Coffee Heat Pump Dryer

Product Description

Model: AHRZ 1450-U-ZD/AHRZ 2550-U-ZD

Power:37P/50P

Type: Coffee beans drying

Structure: Integrated structure

The way of wind out: underfloor air supply

Control screen: 7-inch control screen, computer intelligent control

Machine features:Safe operation, high efficiency, energy saving, environmental protection, unattended, precise temperature control, high quality and worry-free;

Application field:it is used for drying coffee beans, grains, wheat, corn, soybeans, etc.

1.Low crushing, less failure, less brown rice, fast drying speed and fast discharging.

2.Safe and worry-free—no fuel and no burning; no light fire, not easy to lead tofireaccident, and mush safer..

3.Save labor and effort—drying is automatically completed, the whole process is protected. Automaticallyshutdown when the drying iscompleted.

4.Easy to operate—large screen display, one-key operation, convenient and efficient

5.High quality of grains—real low temperature drying; precise moisture control; no harmful residues added to the grains; highquality.

6.High-efficiency and energy-saving—it adopts air energy technology transplantation application, which consumes 1 part of electric energy toproduces about 4 times ofheat energy. It is more than 80% of fuel can be saved compared with coal-fired drying.

7.Green and environmental protection-it usesheat pump technology to achieve zero emissions; no pollution to the atmosphere,soil and water sources, and zero contribution to PM2.5.

8.Strong adaptability — it can be used in a wide range of ambient temperature from -5°C to 40°C; and can work under conditions with high ash content.

9.Heat pump transformation—The heat pump hot-air blower can replace the existing burner or combustion furnace. It is atransformation of the existing dryer.

10.Automatic dust collection — it adopts original dust collection technology, so that the heat pump can work in an environment with a lot of dust.

11.Unique drying tunnel—uniquedesign withlarge drying area and large air volume, which is equipped with emergency grain unloading port and straw removal port at the tower bridge.

12.Unique dust exhausting method—dust exhaustingis more thorough, and the food is cleaner.

13.Environmental protection and dust collection—Shuntec has conduct independent research ondust collection equipment that does not discharge ash, thus drying grains will no longer need to worry about discharging too much ash. Users can purchase environmental protection dust collection equipment.

 product nameGrain dryer
Unit Type5HHX-105HHX-125HHX-165HHX-205HHX-255HHX-305HHX-36
Dry formMixed flow
Processing capacity(kg)Paddy(Capacity=560kg/m3)10121620253036
Corn(Capacity=750kg/m3)1315.620.82632.53945
Wheat(Capacity=750kg/m3)1315.620.82632.53945
Drying tower size(mm)(L)x(W)x(W)2030x2420x80352030x2420x92952420x2420x96602420x2420x109202420x2420x121803200x2420x106503980x2420x10700
Drying tower weight(kg)4000420050005300560065007500
Heat pump dryer model(Optional)48P48P60P60P72P96P120P
Total input power of drying tower(kW)6.956.9515.4515.4515.4520.222
Heat pump heater(KW)52.652.6656580105132
Heat pump heating(kW)200200250250300400500
FuelHeat pump and traditional heat source
Heating formIndirect heating
Precipitation rate(%/h)0.8~1.2
Drying temperature range(C)50~75
Performanceentry time(minute)60606060606060
departure time(minute)45454545454545
Control and protection devicessafety equipmentFull grain alarm, power supply alarm, motor overload protection, heat pump pressure protection of refrigeration system,Temperature sensor protection, humidity sensor protection
way to controlAutomatic control
Applicable ambient temperature((℃)≥-5

*1. Nominal working condition: outdoor side: dry bulb temperature 20℃, wet bulb temperature 15℃;  Indoor side: dry bulb temperature: 70℃, wet bulb temperature:

*2. The moisture discharge capacity is calibrated under standard test conditions and will be different due to indoor and outdoor wet bulb temperature changes.

*3. Models, parameters and performance may change due to product improvement without prior notice. Specific parameters shall be subject to the nameplate of the product.

Working principle of direct heating grain dryer (combined with drying tower)

It adopts mixed-flow drying process, and the cleaned grains are fed into the dryer by a hoist. The grains flow continuously from top to bottom of the equipment by their own weight, and the tempering and drying process are realized during this flow process.

The hot air can flows in the same or opposite direction of the grain, which is called mixed flow. By adjusting the temperature of the heat pump dryer, when the hot air passes through the grain layer, it transfers heat and moisture with the grain. This means the hot air transfers the heat to grains, and the grain increase their temperature naturally. When the grains are heated, the water evaporates into the air and becomes exhaust gas. Reasonably matching the air volume of the induced draft fan to realize various drying temperatures and to control the ratio of air volume to grain. By adjusting the speed of the grain discharge motor, the residence time of the grains in the drying section is controlled, and the dried hot grain flows down to the tempering section. The temperature and moisture content of the inner and outer layers of the grains tend to be balanced after the tempering stage, therefore, it not only achieves moisture uniformity of the whole batch of grains, but also achieves the purpose of high-quality, high-efficiency, and energy-saving drying.

Schematic diagram of the working principle of direct heating grain drying equipment

Machine components:

1、Heat pump drying mainframe:it mainly used for connecting the drying tower, the heat source is to absorb the air and then use it for compression, and then generate gas with high temperature and high pressure.

2、Drying tower:Grain dryer equipment is divided into heat source and drying tower, the drying tower transports our grain to the drying area, and then drying along with the belt and flow down. After the drying is completed, it will enter into grain discharge area for discharge

1.Low crushing, less failure, less brown rice, fast drying speed and fast discharging.

2.Safe and worry-free—no fuel and no burning; no light fire, not easy to lead tofireaccident, and mush safer..

3.Save labor and effort—drying is automatically completed, the whole process is protected. Automaticallyshutdown when the drying iscompleted.

4.Easy to operate—large screen display, one-key operation, convenient and efficient

5.High quality of grains—real low temperature drying; precise moisture control; no harmful residues added to the grains; highquality.

6.High-efficiency and energy-saving—it adopts air energy technology transplantation application, which consumes 1 part of electric energy toproduces about 4 times ofheat energy. It is more than 80% of fuel can be saved compared with coal-fired drying.

7.Green and environmental protection-it usesheat pump technology to achieve zero emissions; no pollution to the atmosphere,soil and water sources, and zero contribution to PM2.5.

8.Strong adaptability — it can be used in a wide range of ambient temperature from -5°C to 40°C; and can work under conditions with high ash content.

9.Heat pump transformation—The heat pump hot-air blower can replace the existing burner or combustion furnace. It is atransformation of the existing dryer.

10.Automatic dust collection — it adopts original dust collection technology, so that the heat pump can work in an environment with a lot of dust.

11.Unique drying tunnel—uniquedesign withlarge drying area and large air volume, which is equipped with emergency grain unloading port and straw removal port at the tower bridge.

12.Unique dust exhausting method—dust exhaustingis more thorough, and the food is cleaner.

13.Environmental protection and dust collection—Shuntec has conduct independent research ondust collection equipment that does not discharge ash, thus drying grains will no longer need to worry about discharging too much ash. Users can purchase environmental protection dust collection equipment.

 product nameGrain dryer
Unit Type5HHX-105HHX-125HHX-165HHX-205HHX-255HHX-305HHX-36
Dry formMixed flow
Processing capacity(kg)Paddy

(Capacity=560kg/m3)

10121620253036
Corn

(Capacity=750kg/m3)

1315.620.82632.53945
Wheat

(Capacity=750kg/m3)

1315.620.82632.53945
Drying tower size(mm)(L)x(W)x(W)2030x2420x80352030x2420x92952420x2420x96602420x2420x109202420x2420x121803200x2420x106503980x2420x10700
Drying tower weight(kg)4000420050005300560065007500
Heat pump dryer model(Optional)48P48P60P60P72P96P120P
Total input power of drying tower(kW)6.956.9515.4515.4515.4520.222
Heat pump heater(KW)52.652.6656580105132
Heat pump heating(kW)200200250250300400500
FuelHeat pump and traditional heat source
Heating formIndirect heating
Precipitation rate(%/h)0.8~1.2
Drying temperature range(C)50~75
Performanceentry time(minute)60606060606060
departure time(minute)45454545454545
Control and protection devicessafety equipmentFull grain alarm, power supply alarm, motor overload protection, heat pump pressure protection of refrigeration system,

Temperature sensor protection, humidity sensor protection

way to controlAutomatic control
Applicable ambient temperature((℃)≥-5

*1. Nominal working condition: outdoor side: dry bulb temperature 20℃, wet bulb temperature 15℃;  Indoor side: dry bulb temperature: 70℃, wet bulb temperature:

*2. The moisture discharge capacity is calibrated under standard test conditions and will be different due to indoor and outdoor wet bulb temperature changes.

*3. Models, parameters and performance may change due to product improvement without prior notice. Specific parameters shall be subject to the nameplate of the product.

Working principle of direct heating grain dryer (combined with drying tower)

It adopts mixed-flow drying process, and the cleaned grains are fed into the dryer by a hoist. The grains flow continuously from top to bottom of the equipment by their own weight, and the tempering and drying process are realized during this flow process.

The hot air can flows in the same or opposite direction of the grain, which is called mixed flow. By adjusting the temperature of the heat pump dryer, when the hot air passes through the grain layer, it transfers heat and moisture with the grain. This means the hot air transfers the heat to grains, and the grain increase their temperature naturally. When the grains are heated, the water evaporates into the air and becomes exhaust gas. Reasonably matching the air volume of the induced draft fan to realize various drying temperatures and to control the ratio of air volume to grain. By adjusting the speed of the grain discharge motor, the residence time of the grains in the drying section is controlled, and the dried hot grain flows down to the tempering section. The temperature and moisture content of the inner and outer layers of the grains tend to be balanced after the tempering stage, therefore, it not only achieves moisture uniformity of the whole batch of grains, but also achieves the purpose of high-quality, high-efficiency, and energy-saving drying.

Schematic diagram of the working principle of direct heating grain drying equipment

Machine components:

1、Heat pump drying mainframe:it mainly used for connecting the drying tower, the heat source is to absorb the air and then use it for compression, and then generate gas with high temperature and high pressure.

2、Drying tower:Grain dryer equipment is divided into heat source and drying tower, the drying tower transports our grain to the drying area, and then drying along with the belt and flow down. After the drying is completed, it will enter into grain discharge area for discharge

1.It can simulate winter weather conditions, and the equipment can automatically achieve both cold air(10°C)dryingand hot air (75°C) drying;

2.High degree of automation. It usestouch screen controller andcan accurately control the temperature and humidity of the drying room;

3.The production environment is sanitary, and there is no discharge of exhaust gas, waste water or waste residue during the operation processing;

4.Save labor cost, no need to arrange full-time personnel to guard the equipment.

Unit Type/DL-RFX-3PDL-RFG-3PDL-RFS-6PDL-RFS-12P
Drying room size: length, width and heightm1.8*1.1*2.22.25*1.1*2.24.2*2.2*2.65.6*3*2.6
Drying temperature rangenormal atmospheric temperature-7010-7510-7510-75
Compressor powerkW3P3P6P12P
Heating capacitykW10.510.52142
Compressor brand/American Copeland
Electric auxiliary heating powerKw221218
Average power consumption per hourKw/h33612
Power supplyV/Hz220/50 ±10%220/50  ±10%380/50  ±10%380/50  ±10%
Way to control/Touch screen control
Refrigerant/R134a

Drying process

In the pet feed production process, drying is a very important link. The pet feed production process is as follows:

Raw material configuration-mixing and stirring-extrusion molding-drying-oil spray (seasoning)-weighing and packaging.

The pet snack drying box can set different drying processes according to the customer’s drying requirements. The control system adopts a touch-screen control mode, which can set multiple time periods (up to 10 time periods), different temperatures, and drying room humidity to drying the materials. The equipment has its own refrigeration function. The dried fruit needs to regain moisture after drying. The refrigeration mode can be set, and the mainframe can automatically complete the conversion between the heating mode and refrigeration modes. In addition, it has storage memory function for drying process.

The pet snack drying box adopts PLC & touching screen programmable control system, which can accurately control various curve parameters in the drying process. The temperature and humidity control accuracy is high. The humanized touch screen can operate delicately and automatically, which can realize intelligent management. There is no need to manually turn over animal materials, no need to change baking trays and carts, and no need for special personnel on duty,  thus it saves lots of effort. The dried product is of high grade, and the machine is simple and convenient to operate, which does not require full-time technicians to operate the equipment. The drying temperature is mild, so there is no need to worry about the high temperature in the air outlet area will affect the quality of the air outlet products.

Machine Components:

1.Rear air supply integrated machine: controls the start and stop of the drying room; controls the temperature, humidity, and dehumidification time of the drying room; provides heat energy for material drying.

2.Polyurethane sandwich board warehouse provides heat preservation for drying room materials.

3.Fan wall: Provides wind energy for the drying room materials to bring out the moisture in the materials; brings out the heat energy in the host to make the drying room heat up or cool down.

4.Air guide wall: guides the wind of the fan wall to the front end, so that the air volume before and after the drying room is consistent, and achieves the purpose of uniform drying of materials.

1.It can simulate winter weather conditions, and the equipment can automatically achieve both cold air(10°C)dryingand hot air (75°C) drying;

2.High degree of automation. It usestouch screen controller andcan accurately control the temperature and humidity of the drying room;

3.The production environment is sanitary, and there is no discharge of exhaust gas, waste water or waste residue during the operation processing;

4.Save labor cost, no need to arrange full-time personnel to guard the equipment.

Unit Type/DL-RFX-3PDL-RFG-3PDL-RFS-6PDL-RFS-12P
Drying room size: length, width and heightm1.8*1.1*2.22.25*1.1*2.24.2*2.2*2.65.6*3*2.6
Drying temperature rangenormal atmospheric temperature-7010-7510-7510-75
Compressor powerkW3P3P6P12P
Heating capacitykW10.510.52142
Compressor brand/American Copeland
Electric auxiliary heating powerKw221218
Average power consumption per hourKw/h33612
Power supplyV/Hz220/50 ±10%220/50  ±10%380/50  ±10%380/50  ±10%
Way to control/Touch screen control
Refrigerant/R134a

Drying process

In the pet feed production process, drying is a very important link. The pet feed production process is as follows:

Raw material configuration-mixing and stirring-extrusion molding-drying-oil spray (seasoning)-weighing and packaging.

The pet snack drying box can set different drying processes according to the customer’s drying requirements. The control system adopts a touch-screen control mode, which can set multiple time periods (up to 10 time periods), different temperatures, and drying room humidity to drying the materials. The equipment has its own refrigeration function. The dried fruit needs to regain moisture after drying. The refrigeration mode can be set, and the mainframe can automatically complete the conversion between the heating mode and refrigeration modes. In addition, it has storage memory function for drying process.

The pet snack drying box adopts PLC & touching screen programmable control system, which can accurately control various curve parameters in the drying process. The temperature and humidity control accuracy is high. The humanized touch screen can operate delicately and automatically, which can realize intelligent management. There is no need to manually turn over animal materials, no need to change baking trays and carts, and no need for special personnel on duty,  thus it saves lots of effort. The dried product is of high grade, and the machine is simple and convenient to operate, which does not require full-time technicians to operate the equipment. The drying temperature is mild, so there is no need to worry about the high temperature in the air outlet area will affect the quality of the air outlet products.

Machine Components:

1.Rear air supply integrated machine: controls the start and stop of the drying room; controls the temperature, humidity, and dehumidification time of the drying room; provides heat energy for material drying.

2.Polyurethane sandwich board warehouse provides heat preservation for drying room materials.

3.Fan wall: Provides wind energy for the drying room materials to bring out the moisture in the materials; brings out the heat energy in the host to make the drying room heat up or cool down.

4.Air guide wall: guides the wind of the fan wall to the front end, so that the air volume before and after the drying room is consistent, and achieves the purpose of uniform drying of materials.

1.Low crushing, less failure, less brown rice, fast drying speed and fast discharging.

2.Safe and worry-free—no fuel and no burning; no light fire, not easy to lead to fire accident, and mush safer..

3.Save labor and effort—drying is automatically completed, the whole process is protected. Automatically shutdown when the drying is completed.

4.Easy to operate—large screen display, one-key operation, convenient and efficient

5.High quality of grains—real low temperature drying; precise moisture control; no harmful residues added to the grains; high quality.

6.High-efficiency and energy-saving—it adopts air energy technology transplantation application, which consumes 1 part of electric energy to produces about 4 times of heat energy. It is more than 80% of fuel can be saved compared with coal-fired drying.

7.Green and environmental protection-it uses heat pump technology to achieve zero emissions; no pollution to the atmosphere,soil and water sources, and zero contribution to PM2.5.

8.Strong adaptability — it can be used in a wide range of ambient temperature from -5°C to 40°C; and can work under conditions with high ash content.

9.Heat pump transformation—The heat pump hot-air blower can replace the existing burner or combustion furnace. It is a transformation of the existing dryer.

10.Automatic dust collection — it adopts original dust collection technology, so that the heat pump can work in an environment with a lot of dust.

11.Unique drying tunnel—unique design with large drying area and large air volume, which is equipped with emergency grain unloading port and straw removal port at the tower bridge.

12.Unique dust exhausting method—dust exhausting is more thorough, and the food is cleaner.

13.Environmental protection and dust collection—Shuntec has conduct independent research on dust collection equipment that does not discharge ash, thus drying grains will no longer need to worry about discharging too much ash. Users can purchase environmental protection dust collection equipment.

Parameter of direct heating heat pump dryer for coffee beans

 product name coffee bean dryer
Unit Type5HHX-105HHX-125HHX-165HHX-205HHX-255HHX-305HHX-36
Dry formMixed flow
Processing capacity(kg)Paddy(Capacity=560kg/m3)10121620253036
Corn(Capacity=750kg/m3)1315.620.82632.53945
Wheat(Capacity=750kg/m3)1315.620.82632.53945
Drying tower size(mm)(L)x(W)x(W)2030x2420x80352030x2420x92952420x2420x96602420x2420x109202420x2420x121803200x2420x106503980x2420x10700
Drying tower weight(kg)4000420050005300560065007500
Heat pump dryer model(Optional)48P48P60P60P72P96P120P
Total input power of drying tower(kW)6.956.9515.4515.4515.4520.222
Heat pump heater(KW)52.652.6656580105132
Heat pump heating(kW)200200250250300400500
FuelHeat pump and traditional heat source
Heating formIndirect heating
Precipitation rate(%/h)0.8~1.2
Drying temperature range(C)50~75
Performanceentry time(minute)60606060606060
departure time(minute)45454545454545
Control and protection devicessafety equipmentFull grain alarm, power supply alarm, motor overload protection, heat pump pressure protection of refrigeration system,Temperature sensor protection, humidity sensor protection
way to controlAutomatic control
Applicable ambient temperature((℃)≥-5
Parameter table of box type coffee bean heat pump dryer
 ModelJMHPK-125XCJL-4 Power supply380V-50HZ
Overall dimensions7340*1950*2480mmBuilt-in drying room size4800*1850*1200mm
Recommended drying capacity     3000kg/set
Table/weight≥2500kgAir flow formNegative pressure and uniform blast
Compressor quantity2CompressorCopeland
Maximum temperatureOut of the wind≤78℃Working conditions-5~50℃
heating output125kWDehumidification capacity90~120L/H
Nominal input power41.5kWRated current78.8A
Maximum input power59.5kWMaximum current113A
RefrigerantEnvironmental friendly refrigerantmaximum  pressure3.0MPa
Circulation fanHigh temperature fanwaterproof levelIPX4
Room temperature≤80℃Noise≦68dB(A)
Control panelTemperature sensor 1, humidity sensor 1, 7-inch touch screen
Frame material aluminum with composite insulation board
Dryer integrationBottom 10# channel steel + davit 10#
Internal drying rackBuilt-in drying bed

*1. Nominal working condition: outdoor side: dry bulb temperature 20℃, wet bulb temperature 15℃;  Indoor side: dry bulb temperature: 70℃, wet bulb temperature:

*2. The moisture discharge capacity is calibrated under standard test conditions and will be different due to indoor and outdoor wet bulb temperature changes.

*3. Models, parameters and performance may change due to product improvement without prior notice. Specific parameters shall be subject to the nameplate of the product.

Working principle of direct heating coffee bean dryer (combined with drying tower)

It adopts mixed-flow drying process, and the cleaned coffee beans are fed into the dryer by a hoist. The coffee beans flow continuously from top to bottom of the equipment by their own weight, and the tempering and drying process are realized during this flow process.

The hot air can flows in the same or opposite direction of the coffee beans, which is called mixed flow. By adjusting the temperature of the heat pump dryer, when the hot air passes through the coffee beans’ layer, it transfers heat and moisture with the coffee beans. This means the hot air transfers the heat to coffee beans, and the coffee beans increase their temperature naturally. When the coffee beans are heated, the water evaporates into the air and becomes exhaust gas. Reasonably matching the air volume of the induced draft fan can realize various drying temperatures and can control the ratio of air volume to coffee beans. By adjusting the speed of the discharge motor of coffee beans, the residence time of the coffee beans in the drying section is controlled, and the dried and hot coffee beans flows down to the tempering section. The temperature and moisture content of the inner and outer layers of the coffee beans tend to be balanced after the tempering stage, therefore, it not only achieves moisture uniformity of the whole batch of coffee beans, but also achieves the purpose of high-quality, high-efficiency, and energy-saving drying.

Schematic diagram of working principle of direct heating coffee bean drying equipment

Machine components:

1、Heat pump drying mainframe:it mainly used for connecting the drying tower, the heat source is to absorb the air and then use it for compression, and then generate gas with high temperature and high pressure.

2、Drying tower:Grain dryer equipment is divided into heat source and drying tower, the drying tower transports our grain to the drying area, and then drying along with the belt and flow down. After the drying is completed, it will enter into grain discharge area for discharge

Coffee bean heat pump drying system (box type)

Engineering installation is industrial standardization, and the integrated design is no longer need to implement drying room installation. It is plug in and play and installed with an AI artificial intelligence control. It could fully retain the nutrient composition, color, aroma, taste and shape of materials after drying, in addition, it could realize Multi-level energy efficiency and comprehensive heat utilization, which saves more than 70% of energy than traditional methods. The characteristics of Shuntec drying equipment include: (1) negative pressure air distribution, which is patented;(2) uniform drying without dead corner, which could realize drying uniformity of the whole batch; (3) intelligent management; (4) recording the drying process intelligently; (5) real-time monitoring; (6) unattended.

Working principle diagram

Coffee bean drying process

Drying

The moisture in the coffee beans shall be evaporated. When the coffee beans begin to absorbs heat, the color of the coffee beans changes from green to yellow or light brown. After the silver film falls off, the faint grass aroma will spread to the surroundings. This process takes almost half of the entire roasting time. Although it only removes the moisture in the coffee beans, the evaporation rate control is the key element. Generally, it takes about ten minutes for the water to reach the boiling point, and then the moisture in the roasted coffee beans begins to evaporate until all of it has totally been evaporated.

Pyrolysis (twice)

When the moisture of the coffee beans begins to evaporate into gas, the first popping sound will occur, then it turns to heat absorption process. At this time, the internal pressure of the coffee beans can reach 25 bar. Under strong pressure, coffee beans begin to deconstruct the original organization, generating the flavor and taste. When the temperature reaches 190 degrees, the endothermic and exothermic transition occurs again. Under the action of pyrolysis, the color of coffee beans also began to change, gradually turning from brown to dark brown, and at this time began to re-roast.

cool down

After the coffee is roasted, it must be cooled in time to stop the pyrolysis effect, so as to lock the flavor and prevent the flavor from losing. There are two cooling methods, one is air cooling and the other is water cooling. Air-cooling uses a lot of cold air to cool the coffee in three to five minutes. Compared with the air-cooling type, the water-cooling type is slower, but it is clean and unpolluted, and can better retain the aroma of the coffee, but the control of the water mist must be calculated accurately timely.

Precautions for roasting green coffee beans

Achieving the highest caramelization

Caramelization is an important factor that affects the flavor of coffee. As green beans absorb a lot of heat energy when roasting, the first crackling sound occurs at this time. At this time, sugar begins to be converted into carbon dioxide, water continues to evaporate, and the aroma of coffee will gradually radiate out and form coffee grease. This pyrolysis reaction can continue to the second explosion, but when the second explosion is completed, coffee bean’s temperature should be lowered with cold air as soon as possible, so that the highest caramelization can be achieved.

Minimal carbonization

During the baking process, some ingredients will also be carbonized, forming a bad bitter substance. Therefore, when the second burst is completed, the heating can be stopped to minimize the carbonization at the same time.

Pay attention to the voice change

Coffee beans will make two popping noises during the roasting process. The first popping sound is low, indicating that starch begins to turn into caramel, and water evaporates with carbon dioxide. The second popping sound is more violent and sharp, which is the fibers breaking voice of coffee bean cell . At this time, you should stop heating immediately and use cold air to lower the temperature as soon as possible. The interval between the first bursting time and the second bursting time can be quite long. Therefore, when baking different beans, you must find the best baking conditions for the beans.

Pay attention to changes in color and taste

The color of the coffee beans will change from green to light brown as the temperature continues to rise, and then become a reddish brown with a trace of oil, afterwards, it will turn into a shiny dark brown with a large amount of oil. At this time, you should not need to bake it anymore, otherwise the coffee oil on the surface of the beans will become dried, and a lot of smoke and burnt smell will be emitted.

1.Low crushing, less failure, less brown rice, fast drying speed and fast discharging.

2.Safe and worry-free—no fuel and no burning; no light fire, not easy to lead to fire accident, and mush safer..

3.Save labor and effort—drying is automatically completed, the whole process is protected. Automatically shutdown when the drying is completed.

4.Easy to operate—large screen display, one-key operation, convenient and efficient

5.High quality of grains—real low temperature drying; precise moisture control; no harmful residues added to the grains; high quality.

6.High-efficiency and energy-saving—it adopts air energy technology transplantation application, which consumes 1 part of electric energy to produces about 4 times of heat energy. It is more than 80% of fuel can be saved compared with coal-fired drying.

7.Green and environmental protection-it uses heat pump technology to achieve zero emissions; no pollution to the atmosphere,soil and water sources, and zero contribution to PM2.5.

8.Strong adaptability — it can be used in a wide range of ambient temperature from -5°C to 40°C; and can work under conditions with high ash content.

9.Heat pump transformation—The heat pump hot-air blower can replace the existing burner or combustion furnace. It is a transformation of the existing dryer.

10.Automatic dust collection — it adopts original dust collection technology, so that the heat pump can work in an environment with a lot of dust.

11.Unique drying tunnel—unique design with large drying area and large air volume, which is equipped with emergency grain unloading port and straw removal port at the tower bridge.

12.Unique dust exhausting method—dust exhausting is more thorough, and the food is cleaner.

13.Environmental protection and dust collection—Shuntec has conduct independent research on dust collection equipment that does not discharge ash, thus drying grains will no longer need to worry about discharging too much ash. Users can purchase environmental protection dust collection equipment.

Parameter of direct heating heat pump dryer for coffee beans

 product name coffee bean dryer
Unit Type5HHX-105HHX-125HHX-165HHX-205HHX-255HHX-305HHX-36
Dry formMixed flow
Processing capacity(kg)Paddy

(Capacity=560kg/m3)

10121620253036
Corn

(Capacity=750kg/m3)

1315.620.82632.53945
Wheat

(Capacity=750kg/m3)

1315.620.82632.53945
Drying tower size(mm)(L)x(W)x(W)2030x2420x80352030x2420x92952420x2420x96602420x2420x109202420x2420x121803200x2420x106503980x2420x10700
Drying tower weight(kg)4000420050005300560065007500
Heat pump dryer model(Optional)48P48P60P60P72P96P120P
Total input power of drying tower(kW)6.956.9515.4515.4515.4520.222
Heat pump heater(KW)52.652.6656580105132
Heat pump heating(kW)200200250250300400500
FuelHeat pump and traditional heat source
Heating formIndirect heating
Precipitation rate(%/h)0.8~1.2
Drying temperature range(C)50~75
Performanceentry time(minute)60606060606060
departure time(minute)45454545454545
Control and protection devicessafety equipmentFull grain alarm, power supply alarm, motor overload protection, heat pump pressure protection of refrigeration system,

Temperature sensor protection, humidity sensor protection

way to controlAutomatic control
Applicable ambient temperature((℃)≥-5
Parameter table of box type coffee bean heat pump dryer
 ModelJMHPK-125XCJL-4 Power supply380V-50HZ
Overall dimensions7340*1950*2480mmBuilt-in drying room size4800*1850*1200mm
Recommended drying capacity     3000kg/set
Table/weight≥2500kgAir flow formNegative pressure and uniform blast
Compressor quantity2CompressorCopeland
Maximum temperatureOut of the wind≤78℃Working conditions-5~50℃
heating output125kWDehumidification capacity90~120L/H
Nominal input power41.5kWRated current78.8A
Maximum input power59.5kWMaximum current113A
RefrigerantEnvironmental friendly refrigerantmaximum  pressure3.0MPa
Circulation fanHigh temperature fanwaterproof levelIPX4
Room temperature≤80℃Noise≦68dB(A)
Control panelTemperature sensor 1, humidity sensor 1, 7-inch touch screen
Frame material aluminum with composite insulation board
Dryer integrationBottom 10# channel steel + davit 10#
Internal drying rackBuilt-in drying bed

*1. Nominal working condition: outdoor side: dry bulb temperature 20℃, wet bulb temperature 15℃;  Indoor side: dry bulb temperature: 70℃, wet bulb temperature:

*2. The moisture discharge capacity is calibrated under standard test conditions and will be different due to indoor and outdoor wet bulb temperature changes.

*3. Models, parameters and performance may change due to product improvement without prior notice. Specific parameters shall be subject to the nameplate of the product.

Working principle of direct heating coffee bean dryer (combined with drying tower)

It adopts mixed-flow drying process, and the cleaned coffee beans are fed into the dryer by a hoist. The coffee beans flow continuously from top to bottom of the equipment by their own weight, and the tempering and drying process are realized during this flow process.

The hot air can flows in the same or opposite direction of the coffee beans, which is called mixed flow. By adjusting the temperature of the heat pump dryer, when the hot air passes through the coffee beans’ layer, it transfers heat and moisture with the coffee beans. This means the hot air transfers the heat to coffee beans, and the coffee beans increase their temperature naturally. When the coffee beans are heated, the water evaporates into the air and becomes exhaust gas. Reasonably matching the air volume of the induced draft fan can realize various drying temperatures and can control the ratio of air volume to coffee beans. By adjusting the speed of the discharge motor of coffee beans, the residence time of the coffee beans in the drying section is controlled, and the dried and hot coffee beans flows down to the tempering section. The temperature and moisture content of the inner and outer layers of the coffee beans tend to be balanced after the tempering stage, therefore, it not only achieves moisture uniformity of the whole batch of coffee beans, but also achieves the purpose of high-quality, high-efficiency, and energy-saving drying.

Schematic diagram of working principle of direct heating coffee bean drying equipment

Machine components:

1、Heat pump drying mainframe:it mainly used for connecting the drying tower, the heat source is to absorb the air and then use it for compression, and then generate gas with high temperature and high pressure.

2、Drying tower:Grain dryer equipment is divided into heat source and drying tower, the drying tower transports our grain to the drying area, and then drying along with the belt and flow down. After the drying is completed, it will enter into grain discharge area for discharge

Coffee bean heat pump drying system (box type)

Engineering installation is industrial standardization, and the integrated design is no longer need to implement drying room installation. It is plug in and play and installed with an AI artificial intelligence control. It could fully retain the nutrient composition, color, aroma, taste and shape of materials after drying, in addition, it could realize Multi-level energy efficiency and comprehensive heat utilization, which saves more than 70% of energy than traditional methods. The characteristics of Shuntec drying equipment include: (1) negative pressure air distribution, which is patented;(2) uniform drying without dead corner, which could realize drying uniformity of the whole batch; (3) intelligent management; (4) recording the drying process intelligently; (5) real-time monitoring; (6) unattended.

Working principle diagram

Coffee bean drying process

Drying

The moisture in the coffee beans shall be evaporated. When the coffee beans begin to absorbs heat, the color of the coffee beans changes from green to yellow or light brown. After the silver film falls off, the faint grass aroma will spread to the surroundings. This process takes almost half of the entire roasting time. Although it only removes the moisture in the coffee beans, the evaporation rate control is the key element. Generally, it takes about ten minutes for the water to reach the boiling point, and then the moisture in the roasted coffee beans begins to evaporate until all of it has totally been evaporated.

Pyrolysis (twice)

When the moisture of the coffee beans begins to evaporate into gas, the first popping sound will occur, then it turns to heat absorption process. At this time, the internal pressure of the coffee beans can reach 25 bar. Under strong pressure, coffee beans begin to deconstruct the original organization, generating the flavor and taste. When the temperature reaches 190 degrees, the endothermic and exothermic transition occurs again. Under the action of pyrolysis, the color of coffee beans also began to change, gradually turning from brown to dark brown, and at this time began to re-roast.

cool down

After the coffee is roasted, it must be cooled in time to stop the pyrolysis effect, so as to lock the flavor and prevent the flavor from losing. There are two cooling methods, one is air cooling and the other is water cooling. Air-cooling uses a lot of cold air to cool the coffee in three to five minutes. Compared with the air-cooling type, the water-cooling type is slower, but it is clean and unpolluted, and can better retain the aroma of the coffee, but the control of the water mist must be calculated accurately timely.

Precautions for roasting green coffee beans

Achieving the highest caramelization

Caramelization is an important factor that affects the flavor of coffee. As green beans absorb a lot of heat energy when roasting, the first crackling sound occurs at this time. At this time, sugar begins to be converted into carbon dioxide, water continues to evaporate, and the aroma of coffee will gradually radiate out and form coffee grease. This pyrolysis reaction can continue to the second explosion, but when the second explosion is completed, coffee bean’s temperature should be lowered with cold air as soon as possible, so that the highest caramelization can be achieved.

Minimal carbonization

During the baking process, some ingredients will also be carbonized, forming a bad bitter substance. Therefore, when the second burst is completed, the heating can be stopped to minimize the carbonization at the same time.

Pay attention to the voice change

Coffee beans will make two popping noises during the roasting process. The first popping sound is low, indicating that starch begins to turn into caramel, and water evaporates with carbon dioxide. The second popping sound is more violent and sharp, which is the fibers breaking voice of coffee bean cell . At this time, you should stop heating immediately and use cold air to lower the temperature as soon as possible. The interval between the first bursting time and the second bursting time can be quite long. Therefore, when baking different beans, you must find the best baking conditions for the beans.

Pay attention to changes in color and taste

The color of the coffee beans will change from green to light brown as the temperature continues to rise, and then become a reddish brown with a trace of oil, afterwards, it will turn into a shiny dark brown with a large amount of oil. At this time, you should not need to bake it anymore, otherwise the coffee oil on the surface of the beans will become dried, and a lot of smoke and burnt smell will be emitted.

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