Drying heat pump unit
| Product Details
Product Overview
A heat pump dryer operates on the reversed Carnot cycle, absorbing heat from the ambient air outside the drying chamber and transferring it indoors to raise the chamber’s temperature. Combined with appropriate equipment, this process dries the material. During operation, the heat pump evaporator absorbs heat from the surrounding air or recovers waste heat from the exhaust air during the drying process. After compression, the energy is transferred into the drying chamber. The heated air inside the chamber is continuously circulated and reheated, extracting moisture from the material. Subsequently, either hot‑air dehumidification or condensation‑based drainage removes the moisture, achieving continuous drying of the material.
- Safe and reliable, long-lasting and cost-saving.
Multi-layered protection, peace of mind.
Long lifespan, low maintenance
Low energy consumption + minimal labor—more cost-effective in the long run.
- Wide-ranging scenarios, compatible with multiple industries.
Agriculture: grains, fruits, vegetables, etc.
Industry: wood, paper products, sludge, etc.
Special items: seafood, preserved meats, etc.
- Intelligent and energy-saving, easy to operate.
Remote control; preset material drying curves available.
Self-diagnostic fault alerts and continuous data logging—no dedicated operator required.
Process standardization ensures consistency across different batches of finished products.
- Efficient drying, enhanced quality
Precise temperature and humidity control
Efficient airflow design ensures uniform hot air with no dead zones.
High nutritional value and excellent appearance retention
- Environmentally friendly and pollution-free, aligning with the dual carbon goals.
Zero emissions, no exhaust gases or waste residues.
Low-noise design, with noise levels controlled at 65–75 dB.
Clean energy compatibility drives the green production transition.
Economic Comparison Between Heat Pump Units and Other Heat-Source Drying Equipment
Under the same operating conditions with a drying chamber temperature of 65°C, comparisons are calculated based on an average moisture removal of 1 kilogram. The latent heat of vaporization of water at 65°C is 560 kcal/kg. During the dehydration process, water…
Evaporation accounts for approximately 60% to 70% of the total heat required during the drying process; therefore, drying 1 kilogram of moisture requires a total of 800 kcal.
Project | High-temperature heat pump | Electric heating | Coal-fired | Oil-fired boiler | Gas boiler |
| Consume energy | Electricity | Electricity | Coal | Diesel fuel | Liquefied gas |
| Calorific value | 860 kcal/degree | 860 kcal/degree | 5000 kcal/kg | 10,300 kcal/kg | 10,800 kcal/kg |
| Thermal efficiency | 250% | 95% | 55% | 80% | 80% |
| Net calorific value | 2150 kcal/degree | 817 kcal/degree | 2750 kcal/kg | 8240 kcal/kg | 8640 kcal/kg |
| Energy consumption | 0.37 degrees | 0.98 degrees | 0.29kg | 0.1kg | 0.1kg |
| Energy unit price | 1 yuan per kWh | 1 yuan per kWh | 0.9 yuan/kg | 8.4 yuan/kg | 7.3 yuan/kg |
| Energy consumption costs | 0.37 yuan | 0.98 yuan | 0.26 yuan | 0.84 yuan | 0.73 yuan |
| Total operating costs (approximate cost) | 0.4 yuan | 1.0 yuan | 0.4 yuan | 1.0 yuan | 0.9 yuan |
| Security | Safe and reliable | Electrical leakage and other safety hazards | Safety hazards such as fires and explosions | Safety hazards such as fires and explosions | Safety hazards such as fires and explosions |
| Environmental | Pollution-free | Pollution-free | Severely polluted | Severely polluted | Greenhouse gas emissions |
| Equipment service life | 10–15 years | 5–8 years | 6–9 years | 6–9 years | 6–9 years |
Common System Operating Principles
Drying equipment (dryers) come in a wide variety of configurations, including cabinet-type, belt-type, tunnel-type, fluidized-bed, spray tower, and rotary drum types, among others.
2. Flow-line production drying system
Belt dryers are typically used for drying granular and lump materials; for slurry‑like materials, it is advisable to form them into pellets or briquettes before drying. In the design of belt dryers, attention should be paid to sealing the sides of the conveyor belt and the inlet of the equipment to prevent air leakage.
A belt dryer is a continuous drying device that evolved from the batch-type dryer. Its operating principle involves spreading wet material in a single or multiple layers on one or more continuously moving conveyor belts, with hot air either penetrating through the material or being blown horizontally across its surface to effect drying.
Keywords:
Heat exchanger
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