Screw vacuum pump is a substitute product for traditional water ring vacuum pump, water jet vacuum pump, reciprocating vacuum pump, slide valve vacuum pump, rotary vane vacuum pump and other vacuum pumps. The upgrading and replacement of this product can effectively eliminate sewage discharge in the vacuum process of the pharmaceutical and chemical industry, facilitate the recovery of exhaust gas solvents, and effectively reduce oil vapor pollution of slide valve vacuum pump and rotary vane vacuum pump, thereby reducing equipment maintenance costs.
Performance characteristics of screw vacuum pump:
1. There is no lubricating oil present in the working chamber, and a clean vacuum can be obtained;
2. There is no oil or gas pollution in the working chamber and the extracted gas has a high recovery and utilization rate of process gas, making tail gas treatment convenient; At the same time, it also avoids the emissions of oil, gas, and oil fumes, resulting in minimal environmental pollution.
3. There is no lubricating oil present in the working chamber, which avoids operational failures caused by emulsification and deterioration of lubricating oil, improves system stability, and reduces the loss of pump lubricating oil.
4. The pump has a wide range of applications. The pump working chamber and spiral rotor surface are coated with anti-corrosion coating, which can adapt to harsh working conditions;
5. The pump chamber is a gap sealed structure, which is insensitive to small particles of dust, and the pump chamber is directly connected without a partition structure, making it difficult for dust to deposit in the pump chamber; When using explosion-proof configuration, it can be used to extract flammable and explosive gases.
6. When the pump is working, the temperature inside the pump chamber can reach over 100 ℃, making it difficult for condensable gases to condense. The pump chamber has a straight through structure, and the exhaust port is at the bottom of the pump chamber, making it easy to discharge impurities inside the pump chamber. Therefore, it is suitable to extract condensable gases.
7. The pump can be used alone or combined with Roots pump, molecular pump, etc. to form an oil-free vacuum unit, which can be used as the front stage pump of the unit. Single pump intake pressure can work normally from 1Pa to atmospheric pressure, with high pumping efficiency, which can greatly simplify the vacuum pumping system.
8. When the screw pump is working, it needs to maintain a high temperature, and the efficiency of natural heat dissipation on the outer surface of the pump is relatively improved. In addition, the temperature difference between the cooling water and the pump is large, and the cooling effect is good. Therefore, the amount of cooling water used in the pump is small, and the temperature requirements for the cooling water are low.
9. The multi-stage rotors are directly connected in a spiral manner, eliminating the intermediate baffle structure and eliminating the intermediate stage suction and exhaust process. The working process is simple, continuous, efficient, and the pump operation stability is high.
10. The parts inside the pump chamber are sealed with gaps, and there is no contact friction between the parts, resulting in low wear and long service life; At the same time, the pump speed is high and the overall size is small.
11. Screw pumps have a simple structure, few types and quantities of parts, and are easy to maintain.
12. Fast start-up, low start-up current, minimal impact on the power grid during start-up, and the pump reaches normal pumping speed immediately after start-up.