A cost-benefit intelligent control method for adding drag-reducing fluid to mine water ring vacuum pumps

Abstract

The invention discloses a cost-benefit intelligent control method for adding drag reducing fluid to a mine water ring vacuum pump. According to the coupling relationship between the liquid level change rate and the drag reducing agent degradation rate, the separation efficiency of a two-stage gas-liquid separator can be controlled. The design plan of the water ring vacuum pump scientifically and accurately adjusts the dosing amount and dosing concentration of the drag reducing fluid, and creates the "viscosity-liquid level" collaborative control method of the drag reducing fluid, which overcomes the "liquid level" in the prior art. The defect of the control mode of “mainly, viscosity as auxiliary” enables it to be at the optimal viscosity and the highest liquid level all the time, which solves the current problem of high cost of adding drag reducing fluid and the uncertainty fluctuation of viscosity, and realizes drag reduction The cost of the liquid is minimized and the energy saving benefit is maximized.

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...

AI Technical Summary

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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