Jiusheng Company specializes in producing a chiller system for papermaking:
The cooling of the paper chiller is accomplished by three mutual systems: a refrigerant circulation system + a water circulation system + an electrical automatic control system.
Refrigerant circulation system: The liquid refrigerant in the evaporator in the paper chiller absorbs the heat in the water and starts to evaporate, reaching a certain temperature difference between the refrigerant and the water, and the liquid refrigerant completely evaporates into a gaseous state, which is then sucked in by the compressor And compressed, the gaseous refrigerant absorbs heat through the condenser (air-cooled/water-cooled), condenses into a liquid, and becomes a low-temperature and low-pressure wet vapor refrigerant after throttling through an expansion valve or capillary tube, and finally completes the refrigerant cycle process.
Water circulation system: The water pump of the paper chiller is responsible for pumping out the water to the papermaking equipment that the user needs to cool. The cooling water takes away the heat and the temperature rises, and then returns to the water tank of the paper chiller.
Electrical automatic control system: The electrical control of the paper chiller consists of a power supply part and an automatic control part. The power supply can supply power to the compressor, cooling fan, condenser, water pump, etc. through the contactor. The automatic control part includes thermostat, pressure protection, delayer, relay, overload protection, etc., mutually combined to achieve automatic start and stop according to water temperature, protection and other functions.
Pulp chillers in paper mills can be divided into air-cooled chillers and water-cooled chillers (most of them choose water-cooled screw chillers)
Features of supporting use of paper chiller:
1. Stable performance: Multiple compressors are used in parallel, and each compressor comes with an independent refrigeration circuit, that is, the evaporator and condenser are also completely independent; all compressors are commanded by a unified microcomputer control system, and they are turned on and off one by one , There will never be mutual interference between each other, and the brand machines are all made with original products, and the single machine failure rate is extremely low. Combining the above reasons, it can ensure that this series of machines have a highly stable performance. * No need to purchase other spare machines.
2. Power saving and energy saving: multiple small and medium power compressors are used in parallel, which will cause minimal interference to the power grid when they are turned on and off. As the load changes, the unit will automatically determine the number of startups to ensure that the compressors that are turned on are in the best working state , Thereby effectively saving power.
3. Long service life: The design of the evaporator and condenser is very reasonable, and they are placed above the compressor. During the entire operation process, most of the lubricating oil stays in the compressor to ensure good lubrication of the compressor.
Jiusheng cold water configuration: 1. Japanese Sanyo, American Copeland, German Bitzer and other big brand compressors; 2. Shell and tube condenser (water-cooled), finned condenser (air-cooled); 3. France Schneider contactor; 4. Bangpu microcomputer processor; 5. Danfoss expansion valve, capillary throttling device; 6. American CLCO filter drier; 7. Temperature controller adopts imported meter; 8. China Taiwan Yuanli water pump; 10. Coil type evaporator.
