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Industrial wastewater salt separation technology and industrialized application thereof

A technology for industrial waste water and coal chemical waste water, which is applied in the direction of general water supply saving, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of poor stability and solidification, increase the operating cost of enterprises, and high treatment cost, so as to reduce emissions The effect of realizing resource utilization, reducing cost and pressure

Active Publication Date: 2017-01-11
INNER MONGOLIA CHINACOAL YUANXING ENERGY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although this technology can achieve the goal of "zero discharge" of sewage / wastewater, its biggest disadvantage is that the crystalline salt is a mixed miscellaneous salt, which contains a variety of inorganic substances and a large amount of organic substances, and the miscellaneous salt is extremely soluble. Poor stability and solidification, can seep out with the rain, causing secondary pollution
In addition, miscellaneous salt is hazardous waste, and the treatment cost is high. At present, the treatment cost of hazardous solid waste is about 3,000 yuan / ton, which greatly increases the operating cost of the enterprise.

Method used

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  • Industrial wastewater salt separation technology and industrialized application thereof
  • Industrial wastewater salt separation technology and industrialized application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Coal chemical wastewater pretreatment

[0062] (1) will 100m 3 The TDS / h is 5560mg / L coal chemical wastewater into the high-density clarifier, and add 2kg / m 3 A mixture of an appropriate amount of polyferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide, and polyacrylamide (the weight ratio of polyferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide, and polyacrylamide is: 50: 20:10:5:5), filter the sediment, soften the water;

[0063] (2) the water to be treated in step (1) passed through ozone for 1 hour, and then the scope of measuring the B / C value was 1.0;

[0064] (3) The wastewater oxidized by ozone in step (2) flowed to the biochemical pool for reaction for 12 hours;

[0065] (4) When the oxygen supply is 95%, the waste water in step (3) is filtered and adsorbed in the MBR membrane bioreactor; After that, it is sent to the next step of desalination treatment; the ion exchanger is regenerated with acid and alkali, and the ...

Embodiment 2

[0083] 1. Coal chemical wastewater pretreatment

[0084] (1) will 200m 3 The TDS / h is 5560mg / L coal chemical wastewater into the high-density clarifier, and add 5kg / m 3 The mixture of polymerized ferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide and polyacrylamide (the weight ratio of polymerized ferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide and polyacrylamide is: 175:60: 30:15:12), filter sediment, water softening;

[0085] (2) the water to be treated in step (1) passed through ozone for 2 hours, and then it was 2.2 to measure the B / C value;

[0086] (3) The wastewater oxidized by ozone in step (2) flowed to the biochemical pool for reaction for 18 hours;

[0087] (4) When the oxygen supply is 100%, the waste water in step (3) is filtered and adsorbed in the MBR membrane bioreactor; It is sent to the next step of desalination treatment; the ion exchanger is regenerated with acid and alkali, and the regenerated wastewater is sent...

Embodiment 3

[0104] 1. Coal chemical wastewater pretreatment

[0105] (1) will be 300m 3 The TDS / h is 7280mg / L coal chemical wastewater into the high-density clarifier, and add 8kg / m 3 A mixture of polymeric ferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide and polyacrylamide (the weight ratio of polymeric ferric sulfate, sodium carbonate, calcium hydroxide, sodium hydroxide and polyacrylamide is 300:100:50 :25:20), filter sediment, water softening;

[0106] (2) the water to be treated in step (1) passed through ozone for 1-3 hours, and then it was 4.5 to measure the B / C value;

[0107] (3) The wastewater oxidized by ozone in step (2) flowed to the biochemical pool for reaction for 24 hours;

[0108] (4) When the oxygen supply is 100%, the waste water in step (3) is filtered and adsorbed in the MBR membrane bioreactor; It is sent to the next step of desalination treatment; the ion exchanger is regenerated with acid and alkali, and the regenerated wastewater is sent ...

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Abstract

The invention relates to an industrial wastewater salt separation technology and industrialized application thereof, belonging to the field of water management. In allusion to coal chemical industry wastewater and coal mine drainage water, reduced high concentration saline water is further concentrated and is subjected to evaporative crystallization for salt separation treatment through double membrane process reduction treatment in the step one and a 'zero release' system in the step two, thereby realizing the goals of the zero release of wastewater and resource utilization of crystal salt and carnallite reduction. Anhydrous sodium sulfate produced according to the technical scheme conforms to the standards of first-grade products in GB / T 6009-2014 Industrial Anhydrous Sodium Sulfate Type I, and sodium sulfate reaches the standards of first-grade refined industrial salt and drying salt in GB / T 5462-2015 Industrial Salt. The technical scheme is simple and practicable, and the operation is convenient, so that the technical scheme is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the field of high-salt wastewater treatment, and relates to a salt separation technology for industrial wastewater treatment and its industrial application, in particular to a salt separation technology for coal chemical wastewater and coal mine drain water and its industrial application. Background technique [0002] In recent years, with the development of industrial and agricultural production and the improvement of urban people's living standards, the discharge of industrial wastewater and urban sewage is increasing. The resulting environmental pollution has seriously affected environmental ecology and human health, especially high-salt The discharge of high-concentration organic wastewater is becoming more and more serious, which is one of the important reasons for water environment pollution. The main ion contained in high-salt organic wastewater is Cl - , SO 4 2- 、Na + , Ca 2+ and other salts. High-concentration io...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCY02A20/131C02F9/00C02F1/00C02F1/04C02F1/048C02F1/08C02F1/12C02F1/42C02F1/441C02F1/444C02F1/445C02F1/5245C02F1/56C02F1/725C02F1/78C02F3/00C02F2301/08C02F2303/16
Inventor 唐多钦杨俊殷智葛向辉杨怀忠韩舜才包双峰张波权秋红张建飞石维平王志稳张普寨周辉郭以果黄瑞
Owner INNER MONGOLIA CHINACOAL YUANXING ENERGY CHEM CO LTD
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