Introduction
The water-cooled screw type cryogenic refrigeration unit is a special refrigeration equipment that is used for carrying cold liquid from - 35 ℃ to 5 ℃. It is suitable for various occasions where low temperature cold liquid below 5 ℃ is required. It is widely used in nonferrous metal metallurgy, chemical and pharmaceutical intermediates, petrochemical industry, grain and oil, food and beverage, machinery, medicine, electronics, air separation, new materials, aerospace, photoelectric technology, new energy Energy saving and environmental protection, etc. Water-cooled screw type cryogenic chillers provide a host machine for various process cooling sources of ethylene glycol aqueous solution or calcium chloride aqueous solution with a certain concentration of - 35 to 5 ℃. This series of cryogenic chillers mainly consists of screw refrigeration compressor, oil separator, shell and tube heat exchanger, economizer, expansion valve, drying filter and PLC control system.
It adopts a special semi closed screw low temperature compressor or two-stage compressor, supplemented by high efficiency heat exchanger technology. The control technology and system configuration are matched. The microcomputer controller is used to make the chiller compact in appearance, reasonable in layout, and easy to use and maintain. Users can put it into operation as long as they connect the pipeline of the water system and the required power supply. This series of water-cooled screw type low temperature chillers are widely used and are specialized in new materials, environmental waste gas recovery, chemical industry, biomedicine, research and development, ultra-low temperature cold source and other industries. The product has mature manufacturing technology and stable and reliable operation. At present, it has won the favor and recommendation of customers.
Characteristic
1.The imported high-efficiency economizer semi closed twin screw compressor is adopted, which has high energy efficiency, reliable operation and long service life. Under the minimum load (25%), the compressor of each refrigeration system starts with star delta voltage reduction, effectively reducing the starting current and the impact on the power grid.
2.Exhaust muffler is set in the compressor to ensure low noise operation of water-cooled screw cryogenic refrigeration unit. The optional heat recovery type adopts the heat collector technology. In summer, the heat recovery can reach 30% - 40% of the cooling capacity, and in winter, the heat recovery of the water-cooled screw type cryogenic water chiller for process can reach 75% at most.
3.Screw refrigeration compressor adopts internationally famous brand screw refrigeration compressor, the third generation asymmetric tooth screw with high efficiency of 5:6.
4.The water-cooled screw type industrial low temperature refrigeration unit is semi enclosed design, with only three moving parts. It has the characteristics of few parts and low failure rate. It can achieve graded or stepless energy regulation, flexible and convenient control, energy conservation, high efficiency and easy maintenance.
5.The world famous SKF and FAG zero clearance multiple thrust and radial bearings are selected, with precise structure and high reliability.
6.The water-cooled screw type cryogenic refrigeration unit adopts a double-layer three-dimensional oil separation filter, which has a good oil filtering effect and effectively ensures the normal operation of the compressor and the efficient heat exchange of the heat exchanger.
Advantage
1. Superior performance:
The main engine adopts the international advanced semi closed screw compressor, motor and compressor integration, without the concern of shaft seal leakage; Double compressors or multiple compressors have startup and shutdown cycle control procedures, which can prolong the service life of components for load balancing; Multiple refrigeration circuits are used for two or more compressors. When one of the circuits needs maintenance, the other circuits can still operate normally.
2. Easy installation:
The water-cooled screw type low temperature chiller is compact in structure, small in floor area and saves room space; When leaving the factory, strict commissioning and fixed rotation have been completed, and the site use status has been fully reached; During installation, it is only necessary to connect the chilled water pipe of evaporator and the cooling water pipe of condenser; Low operation and maintenance cost; The water-cooled screw chiller can implement intelligent program control according to the load demand: 100%, 75%, 50%, 25% (or start), 0,
3. Save energy consumption;
The total number of compressor parts of water-cooled screw type low temperature chiller is only 1/10 of that of reciprocating chiller, with simple structure, few vulnerable parts, no inlet and exhaust valves, insensitive to humidity travel, and extremely low failure rate; The screw compressor can operate for 40000 hours without failure; water-cooled screw chiller has complete safety protection functions; Pressure protection: high-voltage protection and low-voltage electrical automatic protection device; Motor protection: undervoltage protection, phase loss protection, reverse phase protection, overload protection, motor overheating protection; Screw compressor features; High efficiency fluorine resistant motor imported from France is adopted, with high efficiency and good reliability.
4. Microcomputer control
German "SIEMENS" PLC programmable touch controller. The water-cooled screw chiller automatically monitors the temperature of the cold water outlet, automatically controls the slide valve through PLC, regulates the compressor, and effectively tracks the on-site service load; The display screen is intuitive and clear, and the water-cooled screw chiller directly displays the operating water temperature points and operation time at a glance (PLC); Automatically record and save the latest fault alarm condition and occurrence time of water-cooled screw chiller, and send out fault handling tips; According to actual needs, the original content shall be corrected.
Parameters and Specifications of Some Standard Models
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