Processing method of coal mine water and/or coal washing waste water

A coal washing wastewater and treatment method technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of inability to remove chroma and heavy metals from additives, and unable to meet the demand for high-quality water , Tubular microfiltration membrane system is easy to be polluted and other problems, to achieve the effect of easier recovery after cleaning, ensuring high-quality water production, and improving the water quality of produced water

Inactive Publication Date: 2019-01-11
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operating pressure of the tubular microfiltration membrane system is 1.5 to 4.0 bar, relying on high surface flow velocity to alleviate membrane fouling, and the energy consumption is high. At the same time, the tubular microfiltration membrane system is easily polluted and the cleaning frequency is high.
Moreover, the tubular microfiltration membrane system can only remove fine particles, but cannot remove various additives, chroma and heavy metals, etc., and the quality of the produced water is low, which cannot meet the demand for high-quality water

Method used

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  • Processing method of coal mine water and/or coal washing waste water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A coal mine water and / or coal washing wastewater mixed water in Taiyuan, Shanxi was used as the raw water for testing, and the influent water quality fluctuated, SS 1000-2500mg / L, COD 1-10mg / L, NH 3 -N value 2-6m / L, petroleum 2-3mgg / L, Fe 10-20mg / L, Mn5-10mg / L, pH 7-7.5.

[0029] Such as figure 1 As shown, the operating parameters of this process are as follows: After the raw water passes through the regulating tank, it directly enters the flat ceramic membrane tank. The material of the flat ceramic membrane is silicon carbide, the pore size is 0.1 μm, and the membrane module area is 25m2. Every time it runs for 9 minutes, it stops for 1 minute. The suction negative pressure is -10~-20KPa, and the membrane flux is 400-500LMH. Backwash every 60min, the backwash time is 30s, the pressure is 2bar, the backwash flux is 1000LMH, after backwash, the membrane flux can be restored to 500LMH. The aeration is carried out intermittently. The aeration stops when the membrane modu...

Embodiment 2

[0032] The coal washing wastewater from a coal mine in Zhengzhou, Henan was tested as raw water. The influent water quality fluctuated, SS 6000-10000mg / L, COD 100-200mg / L, petroleum 5-8mg / L, pH 5.0-7.3.

[0033] Such as figure 1 As shown, the operating parameters of this process are as follows: After the raw water passes through the regulating tank, it enters the pre-sedimentation tank, and the hydraulic retention time is 1h.

[0034] The supernatant of the pre-sedimentation tank enters the flat ceramic membrane tank. The material of the flat ceramic membrane is alumina, the pore size is 0.2 μm, and the area of ​​the membrane module is 50m 2 , every time it runs for 8.5 minutes, stop for 1.5 minutes, the suction negative pressure is -10 ~ -30KPa, and the membrane flux is 100-350LMH. Backwashing is performed every 30 minutes, the backwashing time is 60s, the pressure is 2bar, and the backwashing flux is 700LMH. After backwashing, the membrane flux can be restored to 350LMH. T...

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Abstract

The invention discloses a processing method of coal mine water and/or coal washing waste water. The processing method comprises following steps: 1, coal mine water and/or coal washing waste water is introduced into an adjusting pool to adjust water quality and water amount so as to obtain raw water; 2, the raw water is introduced into a flat ceramic membrane pool, a flat ceramic membrane assemblyis adopted for purification to remove small particles in the raw water and reduce the turbidity of produced water, wherein according to the operation mode of the flat ceramic membrane assembly, pumping, intermittent stopping, and backwash period are adopted alternatively; and 3, bottom sludge from the flat ceramic membrane pool is prepared into coal washing cakes which can be mixed with coal-air fuel, so that a fuel is prepared, and sludge resource utilization is realized, and produced water of the flat ceramic membrane assembly is subjected to deep treatment or is subjected to direct recycling as industrial recycled water. The processing method is capable of removing large particles, and small particles effectively; no medicine is added; the bottom sludge can be recycled as a fuel; the water quality of obtained water is stable, and recycling standards are reached.

Description

technical field [0001] The invention belongs to the technical field of mine wastewater treatment, and in particular relates to a treatment method for coal mine water and / or coal washing wastewater. Background technique [0002] Coal mine water, coal gangue, and coal mine gas are typical three wastes in the coal mining industry. Coal mine water refers to all the water infiltrated into the underground mining space during the coal mining process, sometimes including a small amount of infiltrated surface water, which has the characteristics of large volume and wide area. According to statistics from the Coal Industry Association, it is estimated that by 2020, the total amount of coal mining in my country will reach 4 billion tons, producing 6 billion cubic meters of mine water. Coal mine water mainly contains suspended solids, inorganic salts, heavy metals, etc. If it is discharged directly, it will cause harm to surrounding water bodies, soil, humans and animals. Therefore, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F9/02C10L5/46
CPCC02F1/44C02F1/441C02F1/52C02F2209/11C02F2301/046C02F2303/14C10L5/46Y02E50/10Y02E50/30
Inventor 黄凤祥姚萌李硕琳黄智陶洪昱斌蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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