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

A comprehensive treatment and salinity technology, applied in the field of coal mine water resource treatment, can solve the unsatisfactory effect of coal mine water treatment and resource utilization, affect the quality of effluent water and the operation of the water treatment system, and the reverse osmosis membrane is easy to clog and pollute and other problems, to increase the range of pollutant removal, easy automation of operation, and reduce membrane fouling

Inactive Publication Date: 2012-06-13
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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  • Claims
  • Application Information

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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 t

Method used

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

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Embodiment 1

[0041] Refer to attached figure 2 , the integrated technology of high suspended solids and high salinity mine water treatment and reuse in the present invention aims at the water quality characteristics of high suspended solids and high salinity mine water, and adds coagulant to the mine raw water to make the water suspended After the colloidal particles are destabilized through the conventional treatment of the compressed electric double layer, the three-membrane filtration technology of the first stage of microfiltration membrane, the second stage of ultrafiltration membrane, and the third stage of reverse osmosis membrane is adopted.

[0042] After the mine raw water is filtered by the microfiltration membrane in the first stage, the effluent water quality can meet the needs of coal mine underground production.

[0043] After the second-stage filtration of ultrafiltration membrane and the third-stage filtration of reverse osmosis membrane, it is filtered step by step, and ...

Embodiment 2

[0059] Chemical cleaning of 208 reverse osmosis membrane third-stage filter pollution in the first-stage reverse osmosis system, with 2.0%wt STPP sodium tripolyphosphate and 0.8%wt Na 2 - EDTA blend, pH 10.0 cleaning solution designed for the removal of calcium sulfate scale and light to moderate levels of natural organic pollutants.

Embodiment 3

[0061] The first-stage reverse osmosis system 208 chemical cleaning of reverse osmosis membrane third-stage filtration pollution, using 1.0%wt sodium bisulfite, cleaning solution with a pH of 11.5, is used to remove metal oxides and hydroxides, and can be used to a certain extent extended to remove calcium sulfate, barium sulfate and strontium sulfate scale.

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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...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/78C02F1/44
Inventor 武强王志强
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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