Cost-benefit intelligent regulation and control method for addition of drag reduction liquid of mining water ring vacuum pump

Abstract

The invention discloses a cost-benefit intelligent regulation and control method for addition of a drag reduction liquid of a mining water ring vacuum pump. According to a coupling relation between the liquid level change rate and the drag reduction agent degradation rate, through assistance by a design scheme that the separation efficiency of a two-stage gas-liquid separator is controllable, the adding amount and the adding concentration of the drag reduction liquid of the water ring vacuum pump are scientifically, accurately and automatically regulated and controlled, a viscosity-liquid level cooperative control method of the drag reduction liquid is created, the defect of the control mode that the liquid level serves as a main condition and the viscosity serves as an auxiliary condition in the prior art is overcome, the drag reduction liquid can be in the optimal viscosity and the highest liquid level all the time, the problems of high adding cost and uncertain viscosity fluctuation of the drag reduction liquid at present are solved, and cost minimization and energy-saving benefit maximization of the drag reduction liquid are realized.

Description

technical field [0001] The invention relates to the field of energy saving and environmental protection, in particular to a cost-benefit intelligent control method for adding drag-reducing fluid to a mine water ring vacuum pump. Background technique [0002] Water ring vacuum pumps are widely used in coal mine gas drainage systems due to their high safety, but they have been facing major engineering problems of high energy consumption and low efficiency. For this reason, engineers and technicians in this field have done a lot of research on the energy-saving and efficiency-improving methods of mine water ring vacuum pumps, proposed the principle of polymer drag reducing fluid to reduce the useless power loss of water ring vacuum pumps, and developed pumps suitable for surface and underground pumping A series of energy-saving systems for station working conditions can automatically add drag reducing fluid to gas pumps, but the quantitative coupling between the loss of drag re...

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Problems solved by technology

CN112354264A discloses the method of "mainly liquid level, supplemented by viscosity" to replenish high and low concentration drag reducing fluid, but its intermittent replenishment causes large fluctuations in liquid level and viscosity, and cannot maintain its optimum viscosity for a long time and maximum liquid level constant, which in turn reduces the economics of the technology

However, it is generally believed that the smaller the loss of drag reducing fluid, the lower the cost of adding drag reducing agent, and the higher the economic benefits of the technology, but this view ignores the impact of molecular degradation of drag reducing agent on the dosage

The application site found that under the condition that the molecular degradation rate of drag reducing agent is relatively fast in summer, if the loss of drag reducing fluid is too small, the amount of fresh drag reducing fluid added will be small, and even if the concentrated solution is added, the optimum energy-saving viscosity will not be achieved. Therefore, simply pursuing the lowest fluid consumption does not necessarily maximize the energy-saving effect of the technology; at the same time, if the fluid consumption is too large, it will also increase the cost of adding drag reducing fluid

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