2 bv5 - 111 | 2 bv5 - 121 | 2 bv5 - The application of water ring vacuum pump - 131

according to the different structure, water ring vacuum pumps can be divided into the following types:

single stage was only mean in a single stage water ring vacuum pump impeller, single function refers to the suction and discharge of each impeller rotation. The limit of vacuum pump is higher, but low pumping speed and efficiency.

single stage water ring vacuum pumps with double acting only refers to the impeller in a single stage, double effect refers to the impeller rotates suction and discharge two at a time. Under the same pumping speed, the size and weight of the water ring vacuum pumps with double acting much smaller than monoculture water ring vacuum pump. Due to the studio symmetrically distributed in both sides of the pump, fan, the load acting on the rotor to improve. This kind of pump with high pumping speed and efficiency, but the lower limit of vacuum.

two stage water ring vacuum pumps most of the two stage water ring vacuum pump is composed of single-acting pumps in series. In essence, it is by two single stage was a water ring vacuum pump impeller connected with a public spindle. Its main characteristic is still under high vacuum degree has higher pumping speed and stability of the working conditions.

atmospheric water ring vacuum pump is actually a with water ring vacuum pump series air ejector unit. Series water ring vacuum pump before a large water pump, improve the ultimate vacuum, expand the application range of the pump.

compared with other types of mechanical vacuum pump, water ring vacuum water pump has the following advantages:

the present invention has simple structure, low manufacturing accuracy, easy to processing. The operation is simple, easy to maintain.

the structure is compact, pump and motor directly connected, usually revolutions are relatively high. The smaller the structure size, the greater the displacement.

no metal friction surface, pump room inside the pump doesn't need lubrication. Seal between rotating part and fixed part can be done directly through the water seal.

indoor compressed gas temperature change is small, the process of the pump can be thought of as the isothermal compression, flammable and explosive gases can be removed.

since there is no exhaust valve and friction surface, so it can remove dust and gas condensable gas and water mixture.

efficiency is low, usually about 30%, selection of up to 50%.

low vacuum degree. This is not only due to the structure limits, more important is due to the saturation vapour pressure of working fluid.

in general, water ring vacuum pump because of its prominent advantages and isothermal compression and water seal is widely used, it can remove inflammable, explosive or corrosive gas, and gas containing dust and moisture.

: condenser vacuum suction, vacuum suction in power industry, flue gas desulfurization, fly ash conveying, exhaust pipe, vacuum exhaust steam turbine seal, and the application of the hot flue gas.

petrochemical application: gas recovery, gas recovery, gas pressure, enhanced oil recovery, gas collection, stability of crude oil, crude oil vacuum distillation recycling/gas pressure, gas compression, steam, filter/wax removal, recycling of the waste gas, polyester, PVC production, packaging, circulation gas compression, pressure swing adsorption ( PSA) , flammable and explosive gas such as acetylene and hydrogen production and the compression and crude oil vacuum distillation tower in the vacuum system, vacuum crystallization and drying, vacuum filtering and vacuum transportation of various kinds of materials.

manufacturing applications: dry, Tray, rotation, rotation, taper and freeze drying machine) , regeneration/drying, distillation reactor, degassing, evaporation crystallization/transfer, filling and/or materials.

black liquor evaporation, coarse pulp washer, precipitation lime filter, filter, vacuum dryer, raw materials and whitewater degassing system, pulp mixing tank compressor, suction box, coucher, inhaled transfer roll, air compressor, wool suction box and the bellows.

plastic industry: degassing, molding extrusion machines, Profile) , foamed polystyrene foam, drying, pneumatic conveying unit, vinyl chloride gas extraction and compression.

instrument should be followed: steam sterilization, ventilator, air cushion, protective clothing, dental instruments and the central vacuum system.

in the environmental protection industry, waste water treatment, gas compression, the application of the vacuum water and waste water purification

1. Request as far as possible within the scope of the selected vacuum degree of vacuum pump in high efficiency operation, namely the critical demands vacuum or critical exhaust pressure, to ensure that the vacuum pump according to the normal operation of the conditions and requirements. Avoid near the biggest vacuum or vacuum pump exhaust pressure range operation.

in this area not only operation efficiency is extremely low, and very unstable, this making it easier for the vacuum pump vibration and noise. For high vacuum pump, run in the area often occur in the process of cavitation. The phenomenon of obvious phenomenon is the noise and vibration in the vacuum pump. Excessive cavitation may damage the pump body, impeller and other components, make the vacuum pump can't work normally.

to see, when the vacuum degree necessary for the vacuum pump or air pressure is not high, can choose priority from a single pump. If the requirement for vacuum or exhaust pressure is very high, single pump usually cannot satisfy them, or if the requirements under the high vacuum pump with large air volume, which requires relatively flat performance curve under high vacuum degree, you can choose two stage pump. If the vacuum degree above - 710 mm hg, can choose roots water ring vacuum unit as a vacuum pump.

2。 According to the amount of pumping system requirements, the correct selection of vacuum pump.

2 bv5 - if you choose 111 | 2 bv5 - 121 | 2 bv5 - 131 types of water ring vacuum pumps and vacuum device, should be based on the system pumping air quantity to select the correct type.