There are three indexes to judge whether the selection of water ring vacuum pump in a pulp and paper vacuum system is reasonable: the pumping capacity, the power of the working point shaft and the matching power of the motor. When selecting the type, on the premise that the pumping power meets the technological requirements of the production line, the working point shaft power of the water-ring vacuum pump should be reduced as much as possible, because the smaller the shaft power consumed by the water-ring vacuum pump, the lower the cost of pulping and papermaking. The matching power of motor is smaller, the total installed capacity is smaller, and the cost of electrical configuration can also be reduced.
Generally speaking, a paper production line with a fixed annual output requires a certain amount of air extraction. For paper mills, in order to reduce energy consumption, save energy, and reduce paper production costs, the correctness of water ring vacuum pump selection is very critical and very important.
To illustrate this problem, we first understand the working characteristics of water ring vacuum pump. Water ring vacuum pump is a volumetric pump. When the type of water ring vacuum pump is determined, its volume is also determined. For water ring vacuum pump, there are two main factors affecting its pumping capacity: the volume of pump and the speed of pump operation.
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