SZ Liquid Ring Vacuum Pump and Compressor

SZ Liquid Ring Vacuum Pump and Compressor--Product overview

SZ Liquid Ring Vacuum Pump and Compressor is used to pump other non-corrosive, water-insoluble, and non-solid particles to form a certain degree of vacuum in the sealed system. It is commonly used in vacuum evaporation, vacuum concentration, vacuum drying, and vacuum filtration. , Vacuum feeding and other technological processes. It is widely used in machinery, petrochemical, pharmaceutical, food, sugar industry and electronics fields. Since the compression of gas is isothermal in the working process, it is not prone to danger when compressing and sucking flammable and explosive gas, so the SZ Liquid Ring Vacuum Pump is more widely used. However, due to the continuous upgrading of products, it has been gradually eliminated by the 2BV water ring vacuum pump.
The SZ type has four specifications: SZ-1, SZ-2, SZ-3 and SZ-4. The maximum vacuum formed by the SZ Liquid Ring Vacuum Pump is between 86% and 95%. The maximum pressure that SZ-1 and SZ-2 can form is 1.0~1.4 kg/cm2, and the maximum pressure of SZ-3 and SZ-4 is 1.5 kg/cm2 under the allowable motor power. If the motor power is increased , The maximum pressure is 2.1 kg/cm2 (the meaning of the pump type: such as SZ-1, S-water ring type, Z-vacuum pump, 1-pump serial number).

SZ Liquid Ring Vacuum Pump and Compressor--Model significance

SZ Liquid Ring Vacuum Pump and Compressor--Working principle

As shown in Figure 1, the impeller ① is eccentrically installed in the SZ type liquid ring vacuum pump body ②, and a certain height of water is injected into the pump when starting. Therefore, when the impeller rotates, the water is affected by the centrifugal force and is in the SZ liquid ring. A rotating liquid ring ③ is formed on the wall of the vacuum pump. The upper inner surface of the liquid ring is tangent to the hub and rotates in the main direction of the arrow. During the first half of the rotation, the inner surface of the liquid ring gradually separates from the hub, so a space is formed between the impeller blades. Gradually expand, so that air is sucked in at the suction port; during the second half of the revolution, the inner surface of the liquid ring gradually approaches the hub, and the space between the blades shrinks, and the air between the blades is compressed and discharged.
　　 So every time the impeller of the SZ type liquid ring vacuum pump rotates once, the volume of the space between the blades changes once, and the water between each blade reciprocates once like a piston, and the SZ liquid ring vacuum pump continuously sucks gas.
　　 Because the water will generate heat during work, and part of the water will be discharged together with the gas, so the SZ liquid ring vacuum pump must be continuously supplied with cold water to cool and replenish the water consumed in the pump. The cold water supplied is preferably 15°C.
When the gas discharged by the SZ type liquid ring vacuum pump is exhaust gas, there is a water tank at the exhaust end. After the exhaust gas and part of the water it carries are discharged into the water tank, the gas escapes through the outlet pipe of the water tank, and the water falls into the water tank. The bottom of the pump is returned to the pump through the return pipe for use. If the circulation time is long, it will generate heat. At this time, a certain amount of cold water needs to be supplied from the water supply of the water tank.

When the compressor is in use, a steam-water separator should be connected to the exhaust end. The gas with water is automatically separated when it enters the separator. The gas is sent from the outlet of the Ono separator to the place where it is needed, and the hot water passes through the automatic The switch is released. (It is easy to generate heat when the gas is compressed, and the water becomes hot water after it comes out of the SZ type liquid ring vacuum pump). At the bottom of the anti-separator, cold water should be continuously supplied to supplement the released hot water, and at the same time, it has a cooling effect. .

Figure 1: The working principle of SZ type liquid ring vacuum pump

SZ Liquid Ring Vacuum Pump and Compressor--Product parameters