(1) Impeller cutting: due to some changes in the rated lift of the rotary vane vacuum pump in the planning and design of the pump station, it is often inconsistent with the actual lift of the water plant. Impeller cutting of the rotary vane vacuum pump is a choice method to solve the contradiction between the limited varieties and specifications of the rotary vane vacuum pump and the diversity of water supply objects. It expands the application scope of the rotary vane vacuum pump, and adjusts the working characteristics of the rotary vane vacuum pump by cutting the impeller, Make it work within a reasonable range.
(2) Speed regulation of rotary vane vacuum pump: In order to make the rotary vane vacuum pump operate in the high efficiency area, it is one of the measures for energy saving of rotary vane vacuum pump. In order to adapt to different working conditions and change the performance curve of rotary vane vacuum pump, speed regulation is also a common method besides impeller cutting.
(3) Reduce the roughness of the flow parts of the vacuum pump, reduce the friction loss of water flow, and polish and remove rust on the inner surface of the impeller and pump housing. With experience, the efficiency of the rotary vane vacuum pump can be accelerated, saving about 1% energy. If a smooth coating is applied, the energy saving effect will be obvious, up to about 5%.
(4) Others: mainly reduce the mechanical loss of the rotary vane vacuum pump itself, such as the friction loss between the shaft seal and the bearing, use the injection type soft pad, pay attention to reducing the transmission loss of the rotary vane vacuum pump, the management conducts scientific and economic scheduling, increases the water level of the forebay, pays attention to the balance of water production and water supply during the peak period, and timely conducts comprehensive analysis and optimization of the pump house units, The rotary vane vacuum pump unit can operate under good working conditions.
Comparing the effects of implementing several energy-saving measures, in addition to adjusting the flow and lift, reasonably configuring and cutting wheels, the cost of applying smooth coating is low and the efficiency increment is high.
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