Introduction to the principles to be followed in the design and use of cyclone separator

　　Cyclone separator is a kind of equipment used for separation of gas-solid system or liquid-solid system. It relies on the rotational movement caused by the tangential introduction of airflow to make solid particles or droplets with large inertia centrifugal force throw away from the outer wall surface.It is widely used in the pharmaceutical industry, especially suitable for coarse dust particles, large dust concentration, high temperature and high pressure, and is often used as an internal separation device in a fluidized bed reactor or as a pre-separator. A wide range of separation equipment.

　　The design and use of cyclone separator must follow the following principles:
　　1. Appropriate oil return holes and filter screens ensure that the refrigeration oil and refrigerant return to the compressor.
　　The size of the oil return hole should try to ensure that no liquid refrigerant returns to the compressor, but also to ensure that the refrigeration oil can return to the compressor as much as possible. If it is liquid refrigerant existing in operation, it is recommended to use a diameter of 1.02mm, if it is because of the shutdown refrigerant migration to the separator, it is recommended to use 1.4mm.
　　2. The cyclone separator must have sufficient capacity to store excess liquid refrigerant.
　　Especially for the heat pump system, it should not be less than 50% of the charging volume. If the conditions need to be tested and verified, because the throttle orifice or capillary is used to throttle during heating, 70% of the liquid refrigerant may return to the cyclone Splitter.There is also a high discharge pressure, and a low suction pressure will allow more liquid refrigerant to enter the separator. The thermal expansion valve will be less, but there may be 50% flow to the cyclone separator, mainly after the defrosting starts, the outer balance is still hot, so the refrigerant will flow through the evaporator without evaporation Thereby entering the cyclone.During shutdown, the cyclone is the coldest part of the system, so the refrigerant will migrate here, so make sure that the gas fraction has sufficient capacity to store these liquid refrigerants.
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