Energy-saving gas pump set combined transportation system used under complex gas extraction working conditions and control method

Abstract

The invention discloses an energy-saving type gas pump set combined transportation system used under complex gas extraction working conditions and a control method. During gas extraction, gas containing a large amount of pulverized coal enters the gas extraction pump set, a working solution pulverized coal mixture is discharged to the inclined plate type water bath cooling box through the gas-liquid separator to be subjected to pulverized coal forced precipitation and primary cooling, and then enters the gas extraction pump set again through the mining thick slurry pump, the secondary coolingdevice and the high-level filter tank, the liquid level and viscosity of the working liquid are subjected to interlock control, so that intelligent preparation and liquid supplementation of the working liquid and self-adaptive adjustment of the optimal energy-saving viscosity are realized, intelligent pollution discharge and purification of the working solution are realized by performing interlockcontrol on the pulverized coal concentration and the coal slime height of the working solution, the gas extraction pump station can achieve efficient, energy-saving, safe and reliable operation of the gas pump under severe extraction conditions, is high in intelligent level, and is particularly suitable for large (extra-large) ground gas extraction pump stations with large pulverized coal contentand poor extraction working conditions such as coal seam drilling or working face upper corners of coal mines in China.

Description

technical field [0001] The invention relates to the technical field of coal mine gas drainage, in particular to an energy-saving gas pump group intermodal transport system and control method for complex gas drainage conditions, and is especially suitable for coal-bearing drilling such as coal seam drilling or upper corners of working faces. Gas extraction points with many powder impurities and harsh working conditions. Background technique [0002] Gas drainage pumps are widely used in coal mine gas drainage systems. They have outstanding advantages such as simple structure, safety and reliability, but they are also recognized by the industry as low-efficiency and high-energy-consuming equipment. The high consumption and low efficiency of gas pumps have become a major technical bottleneck restricting the development of low-carbon, green and efficient mines in my country. For this reason, according to the gas-liquid two-phase flow characteristics and energy loss mechanism in...

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Problems solved by technology

For this reason, according to the gas-liquid two-phase flow characteristics and energy loss mechanism in the gas drainage pump, technicians in this field innovatively proposed a new technology for reducing the energy consumption of the gas drainage pump with a drag-reducing working fluid, and developed a ground fully enclosed Gas pump energy-saving system, this system is mainly suitable for extraction sites with less pulverized coal impurities and good water quality conditions such as high-level pumping roads and goafs. Each needs to be equipped with a separate set of energy-saving systems, and as many as 5 to 20 gas pumps will be installed in large-scale gas drainage pumping stations in China, resulting in difficult construction, large engineering volume and high cost; (2) the working fluid in the gas pump Evaporation will lead to an increase in the viscosity of the drag reducing fluid. When the viscosity is too high, it may cause a liquid supply cut-off that affects the stable operation of the pump and affects the energy-saving effect of this technology. This problem is not considered in the current process; (3) circulation The drag reducing fluid in the pool will undergo biodegradation or shear degradation, and the viscosity change will affect the energy saving effect, and intelligent regulation cannot be realized; (4) The hard particles (such as coal powder, etc.) Risks such as road blockage and serious wear of the pump body, etc., and frequent and regular sewage discharges are required, which consumes a lot of manpower

[0003] Up to now, for large-scale (extra-large) gas drainage pumping stations on the ground, there is no polymer-based drag-reducing pumping station that is suitable for the characteristics of coal seam drilling or upper corners of the working face, such as large coal content and poor drainage conditions. Liquid gas pump group intermodal energy-saving system

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