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1、 Principle of jet vacuum pump

Jet vacuum pump uses fluid to transfer energy and mass to obtain vacuum device. The water flow with certain pressure is ejected through the nozzle with a certain side slope and converges in a focus. Because the jet water velocity is very high, the pressure energy is converted into the velocity energy, so that the pressure in the suction area is reduced and a vacuum is generated. Several high-speed water will be sucked by the gas, after the contraction of the venturi tube and throat diameter fully mixed compression, molecular diffusion energy exchange, speed balance. In the expansion section, the velocity decreases and the pressure increases, which is greater than the atmospheric pressure. The non condensable gas is ejected from the outlet into the storage tank (pool). The water is recycled by centrifugal pump to complete the suction process.

2、 Characteristics of jet vacuum pump

The remarkable characteristics of jet vacuum pump are: saving oil, saving water, reliable work, low maintenance cost, long service life, convenient installation, while vacuumizing, it also has the functions of condensation, dust collection, absorption, exhaust and strengthening reflection. It can be used for vacuum conveying materials, vacuum evaporation, vacuum dehydration, vacuum crystallization, vacuum concentration, vacuum filtration, vacuum drying, chemical absorption, vacuum oxygen removal and oxygen supply, It can also be used for environmental protection and dust collection, changing environmental pollution and working conditions. It can also suck poisonous, corrosive, granular, flammable and explosive gases and liquids

Jet vacuum pump is applied to vacuum suction process in various industries, such as material absorption and transportation, condensation, distillation and evaporation, concentration, decolorization and deodorization, oxygen supply and deaeration, drying and crystallization filtration, chemical absorption, tail gas (waste) neutralization, vacuum pumping, vacuum molding, etc. It is widely used in light industry, chemical industry, chemistry, pharmacy, vacuum smelting, sugar making, salt making, monosodium glutamate, chemical fiber, papermaking, food, plastic rubber, ceramics, large and medium-sized hospitals, factories and mining enterprises, vacuum station, vacuum brick making, foundation pit dewatering, drainage, petroleum, environmental protection and other industries.

3、 Installation and usage

1. Connect the process pipeline so that the outlet of the suction vessel is connected with the inlet flange of the vacuum tank of the vacuum pump. A valve should be set in the middle to ensure that there is no air leakage at the joints.

2. Connect the pipeline of the water storage tank, clean up the sundries in the storage tank, and pour clean water to the outside of the overflow pipe.

3. Connect the power supply and start the centrifugal pump to pump.

4. Check whether the working condition is good after starting. The method is to close the valve in the process pipeline, and the vacuum degree should reach -0.098 MPa. Otherwise, check and remove the fault.

matters needing attention:

1. If the pump is stopped, please open the valve at the lower part of the vacuum tank and close the valve in the process pipeline to prevent the circulating water from flowing back into the vacuum equipment.

2. If outdoor operation, when not in use in winter, please drain all water in the pump (including centrifugal pump) to prevent freezing damage.