Comprehensive recycling technology for mine water with high suspended matter content and high mineralization degree

Abstract

The invention discloses a comprehensive recycling technology for mine water with high suspended matter content and a high mineralization degree. A coagulating agent is added into mine raw water, so that suspended colloid fine particles in water are subjected to conventional compressive double-electric-layer destabilization, and are treated with a three-membrane gradual filtering technology consisting of first-stage microfiltration membrane filtering, second-stage microfiltration membrane filtering and third-stage microfiltration membrane filtering. After the mine raw water is subjected to first-stage microfiltration membrane filtering, effluent can meet the requirement of production under a coal mine; and after the mine raw water is subjected to second-stage microfiltration membrane filtering and third-stage microfiltration membrane filtering and is disinfected with O3, effluent can meet the requirement of daily drinking. Different reverse osmosis membrane automatic back washing technologies and back washing chemical medicament formulae are adopted according to water of different mineralization degrees, so that the problem of poor running effect of a mine water reverse osmosis system with a high mineralization degree is solved, and the effluent quality and stable running of a water treatment system are enhanced.

Description

technical field [0001] The invention relates to a treatment technology for resource utilization of coal mine water, in particular to a resource comprehensive treatment technology for coal mine water with high suspended solids and high salinity. Background technique [0002] As we all know, in the process of coal mining, a large amount of mine water will be produced. Mine water refers to all the water that infiltrates into the underground mining space during the coal mining process, including ground seepage water and rock mass fissure water. According to the "Tenth Five-Year Plan of the Coal Industry and Long-term Development Plan", 1 ton of coal is used to discharge 1.78 tons of mine water. In 2010, 3.38 billion tons of mine water will be discharged, and in 2020, 3.91 billion tons of mine water will be discharged. Due to the long-term leaching and dissolution of the storage medium in the aquifer storage area, a series of physical, chemical and biochemical reactions occur be...

AI Technical Summary

Problems solved by technology

However, reverse osmosis technology is generally used for high-salinity mine water. The scale of pretreatment process is relatively complicated, and the reverse osmosis membrane is easy to clog and pollute, which affects the quality of effluent water and the operation of the water treatment system.

[0009]Because the existing technology adopts different treatment processes and methods according to different mine water types, the effect of mine water treatment and resource utilization in coal mines is not ideal

Images