Efficient running control method for water ring vacuum pump unit and control system

Abstract

The invention discloses an efficient running control method for a water ring vacuum pump unit and a control system and relates to the field of energy saving and emission reduction of fluid machinery. The efficient running control method comprises the following steps: based on the operating characteristics of the water ring vacuum pump unit, building an efficient running control model of the water ring vacuum pump unit; with respective to specific application working conditions, inputting nominal parameters of the water ring vacuum pump unit and user requirement parameters; acquiring real-time operating parameters of the water ring vacuum pump unit via a measuring meter, and through operation feedback of a control box, adjusting such parameters as the rotational speed of the water ring vacuum pump unit, and the opening degree of a supplementary operating fluid control valve in real time; and enabling the water ring vacuum pump unit to work under the conditions of maximum comprehensive efficiency and low power consumption via the steps of pre-vacuumizing, selection of optimal rotational speed and optimal fluid supplementation amount, constant-voltage operation, shutdown judgment and the like. By use of the efficient running control method, the problem of excessively high energy consumption caused by extensive operation of the water ring vacuum pump unit is solved and the effect of saving electricity and water is achieved.

Description

technical field [0001] The invention relates to the field of energy saving and consumption reduction of fluid machinery, in particular to a high-efficiency operation control method and control system of a water ring vacuum pump unit. Background technique [0002] Water ring vacuum pump is a kind of rough vacuum pump, which is widely used in petroleum, chemical industry, machinery, mining, light industry, food and medicine and other related industries, such as vacuum water diversion, vacuum filtration, vacuum distillation, vacuum disinfection and dehydration and degassing, etc. Due to the unique operating principle of the water ring vacuum pump, its application in vacuum dehydration in the paper industry and coal mine gas drainage is becoming more and more prominent. The water ring vacuum pump is developing in the direction of large-scale and complete sets. However, the research on water ring vacuum pumps at home and abroad is still not sufficient, most of which focus on the ...

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Problems solved by technology

However, the patent ZL201520072683.1 controls the flow of water in the water supply pipe to optimize the operation of the water ring vacuum based on the difference between the water flow data measured by the electromagnetic flowmeter and the preset flow standard value, which cannot achieve the improvement of work efficiency. Optimization, first, because the optimal water replenishment volume varies greatly with the operating speed, suction pressure, suction volume, and properties of the working fluid of the water ring vacuum pump unit, it is difficult to set a suitable standard value for all working conditions, the so-called standard value It is the amount of water replenishment under several working conditions at the rated speed measured in the factory; second, the hydraulic loss accounts for a large proportion of the power consumption of the water ring vacuum pump. Theoretically speaking, the smaller the amount of water replenishment, the lowest total power consumption, however The amount of water and the amount of inhalation affect each other, and the optimal water amount is not easy to determine in advance

Patent ZL201520072683.1 applies the method of changing the speed to adjust the power consumption of the water ring vacuum pump, but the adjustment method described in the patent has a slow stabilization speed, which is likely to cause long-term fluctuations in the speed of the water ring vacuum pump, which is not conducive to the stable operation of the water ring vacuum pump

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