Double stage water ring vacuum pump in evaporator industry of application
The double stage water ring pump is a two-stage single acting water ring vacuum pump developed by EVP Vacuum Technology Co., Ltd. on the basis of 2BE1 series. This series of double stage water ring pumps have been applied for patent.
The double stage water ring pump is designed for two-stage compression process. The pumping speed is stable in the range of high vacuum degree, or it can maintain high vacuum degree in the range of large vacuum pumping rate.
The double stage water ring vacuum pump and the single stage water ring vacuum pump are designed and developed for different working conditions. In the range of higher vacuum degree (less than 20000pa), the pumping speed of single-stage water ring vacuum pump decays seriously, even less than 30% of the maximum pumping speed when it is 5000-10000pa. Under this condition, the efficiency is very low and the power consumption is high, but under the condition of coarse vacuum, it shows the advantage of large pumping capacity.
However, the double stage water ring vacuum pump can obtain a larger pumping speed in a higher range of vacuum degree, or maintain a higher vacuum degree in a large range of vacuum pumping rate. The aging rate is 35% to 40% higher than that of single-stage water ring vacuum pump, and the energy consumption is also reduced. Therefore, the proper vacuum pump should be selected according to the use conditions to reduce energy consumption and economic operation.
The evaporator is an operation unit that heats the solution to boiling state by heating, vaporizes and removes part of the solvent, so as to improve the concentration of solute in the solvent. Evaporator is widely used in chemical industry, food industry and pharmaceutical industry;
Vacuum evaporator is a kind of natural circulation evaporator operated under vacuum system. It can concentrate continuously at low temperature under vacuum condition to ensure product quality.
Therefore, a vacuum pump must be used to maintain the vacuum system. Generally, the inlet pressure of the evaporator vacuum system is required to be between 6-10kpa. In this range, the single-stage water ring vacuum pump has serious pumping speed attenuation, even less than 30% of the nominal pumping speed when it is 5000-10000pa. Under this condition, the efficiency is extremely low and the power consumption is high.
And two stage water ring vacuum pump within the scope of the vacuum pumping speed smoothly, can play the biggest extraction ability, under the same energy consumption efficiency more than 30%.
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