Rotary vane vacuum pump in salt industry application
Rotary vane vacuum pump is a two-stage direct connection structure. Its working performance consists of two parts: high-pressure stage and low-pressure stage. Its suction port is connected with vacuum equipment. During operation, a large amount of gas in the container will be inhaled and discharged. When the equipment obtains vacuum, the high-pressure stage exhaust valve will be closed, and the high-pressure stage inhaled gas will be transferred to the second stage, which will be inhaled and discharged through the second stage. A certain vacuum can be obtained. The technical parameters of the pump are 6 x 10-2. The pump is connected with the motor shaft. It has high speed, small size, compact structure and convenient fluidity. It adopts metal scrapers. It is suitable for the use of the front pump of diffusion pump, the matching of precision instruments and laboratories, medicine, food packaging, electronics and other units.
In the production of vacuum salt making, the most effective way to increase the output is to increase the temperature difference of heat transfer. There are two ways to increase the temperature of heat transfer: increasing the first-effect steam pressure and reducing the final-effect vacuum. It is difficult to increase the first-effect steam pressure because of the influence of boiler, power generation and other factors. The relatively independent vacuum system has great potential to be tapped, and its cost is also to reduce the whole cost of vacuum salt making. The key.
Successful application of rotary vane dry vacuum pump in vacuum salt making equipment proves that the vacuum degree meets the requirements of evaporation system, runs steadily and has obvious energy saving effect.
The eccentrically mounted rotor in the rotary vane vacuum pump is tangent to the stator fixed surface. Two (or more) rotating vanes slide in the rotor groove (usually radial) and contact with the stator inner wall. The pump chamber is divided into several variable volume rotary variable volume vacuum pumps.
Generally, the clearance between the rotary vane and the pump chamber is sealed by oil, so the rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump. Rotary vane vacuum pump can extract the dry gas from the sealed container, and a certain amount of condensable gas can also be extracted if a gas ballast device is attached. However, it is not suitable for the removal of gases that are too high in oxygen, corrosive to metals, chemically reactive to pump oil, and contain particulate dust. Rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. Rotary vane pumps are mostly small and medium-sized pumps. There are two kinds of rotary vane vacuum pumps: single-stage and double-stage. The so-called two-stage structure is to connect two single-stage pumps in series. Generally, it is made into two stages to obtain higher vacuum.