_ in the selection of water ring vacuum pump in fertilizer industry

The principle of water ring vacuum pump vacuum

water ring vacuum pump is a pump is the rotational part out of gas in the pump body, its working principle is: the eccentric wheel is mounted on the oval pump body work filled with right amount water, with a number of curved blade rotor rotates in pump body before, formation water ring and the impeller wheel hub with a crescent cavity is formed between water ring, the rotor each roll 1 week, on the rotor between two adjacent blades and water ring cavity formed by, from small to large, from big to small periodic changes. Its cavity is produced by small greaten, vacuum, the inlet suction gas; Produced by the big to hours, pressure, gas is compressed and the vent discharge. Since each adjacent blades with water ring cavity are in different volume change in the composition of the process, so as the rotor turns, the suction of the pump exhaust are continuous, uninterrupted process.

water ring vacuum pump selection

1, should choose as far as possible speed lower specification

the use of water ring vacuum pump in our country is most likely to be 2 series, belongs to the axial suction exhaust single-acting pumps, have multiple speed for choice, for the same specifications as the inlet pressure 200 hPa and 600 hPa, exhaust pressure of 800 hPa and 1013 hPa, the impeller blades of cylindrical linear velocity for 14 ~ 17 m/s, because water pump impeller diameter of large size large is rotational speed is low, so under the premise of same swept volume, should choose as far as possible speed lower pump, large pump than smaller power consumption, high efficiency.

2, should consider the influence of water temperature

because of the water ring vacuum pumps at home and abroad craft function curve and the technical data are on the file is on the premise of inlet water temperature of 15 ℃, the front has also introduced the water temperature below 15 ℃ or higher than the temperature influence coefficient calculation formula of gas.

3, the influence of the suction resistance

because of the gas exhaust opening often in downhole and away from the water ring vacuum pump ( Some coal mine up to several kilometers) , the suction pipe is too long, so should give full consideration to the suction resistance loss, can be calculated in the suction resistance calculation formula used in coal mine system, used in the piping thicker suction pipe, to reduce the resistance loss and minimize the right-angle bend, in order to improve the water pump efficiency.

4, exhaust with micro positive pressure selection

some for pumping the gas emission in coal mine to the distant place or compressed into the storage tanks, exhaust pressure common in 0. 02 ~ 0. Between 5 MPa, G. Because water ring vacuum pump performance curve and the technical data of the technical documentation is under 1 standard atmospheric pressure exhaust pressure, when choosing a pump, exhaust pressure and pump cavity should be considered reflux increasing impact on pump discharge.

water ring vacuum pump in the fertilizer industry application especially phosphate fertilizer industry production is also the key support of the industry in the economic macro-control, because the new items and old enterprise on the technical reform of all above, the scale is given priority to, so large and super large water ring vacuum pumps have been applied in this also, such as a phosphate fertilizer enterprises in yunnan province a new was swept volume of 300 m3 / min of oversize water ring water pump 3 units.

in addition, there are a lot of phosphate fertilizer enterprises technological requirements for absolute pressure in pressure during 80 ~ 100 hPa, still should have bigger extraction ability, and two stage water ring vacuum pumps and air ejector with two stage water ring vacuum pump used in this condition, it has unique advantages, many chemical fertilizer enterprises eliminated vibration noise and the reciprocating vacuum pump with higher vacuum degree, with two stage water ring vacuum pump replacement, and received good effect, can say two stage water ring vacuum pump will be more and more widely applied in the industry.

water ring vacuum pump has the following advantages

1, simple structure, manufacturing accuracy is not high, easy to processing.

2, compact structure, the revolutions of the pump is higher, and can generally be motor straight league.

3, the structure of the small size, can obtain large displacement, covers an area of small also.

4, compressed gas is isothermal, basically the process of compressed gas temperature change is very small.

5, because no metal friction pump cavity surface, the pump inside without lubrication, and wear and tear is small.

6, the seal between the rotating and stationary parts can be directly done by water seal, do not need other sealing, etc.

Whether it's automation or artificial intelligence, the rapid convergence of technology and business often determines water pump’s competitiveness.
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