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Method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles

A technology of sodium chloride and sodium sulfate, applied in chemical instruments and methods, alkali metal chlorides, alkali metal sulfites/sulfites, etc., can solve the problems of poor stability, complicated process flow, low product purity, etc.

Inactive Publication Date: 2020-07-07
江苏江中纪元科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention solves the problems of complex process flow, poor stability, low product purity and high energy consumption in the mixed wastewater treatment process containing sodium sulfate and sodium chloride, and provides a three-cycle method for synchronously removing sodium sulfate and sodium chloride in wastewater , the method has the advantages of simple process flow, strong stability, high product purity, and low energy consumption.

Method used

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  • Method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles
  • Method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles
  • Method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The water quality index of an industrial high-salt wastewater (No. 1) is shown in the table below:

[0044] Table 1 Water quality index of an industrial high-salt wastewater (No. 1)

[0045]

[0046] Using a method and device for synchronously removing sodium sulfate and sodium chloride in water with three cycles to treat industrial high-salt wastewater, the experimental results: 12m 3 After 24 hours of mixed wastewater operation, the zero discharge rate of wastewater was 99.9%, the average removal rate of COD was 87.2%, the removal rate of sodium sulfate was as high as 97.0%, and the removal rate of sodium chloride was as high as 98.1%. A total of 0.256×10 3 kg sodium sulfate crystals, 0.412×10 3 kg of sodium chloride crystals, the equipment operates stably.

Embodiment 2

[0048] The water quality index of an industrial high-salt wastewater (No. 2) is shown in the table below:

[0049] Table 1 Water quality index of an industrial high-salt wastewater (No. 2)

[0050]

[0051] Using a method and device for synchronously removing sodium sulfate and sodium chloride in water with three cycles to treat industrial high-salt wastewater, the experimental results: 12m 3 After 24 hours of mixed wastewater operation, the zero discharge rate of wastewater was 99.9%, the average removal rate of COD was 92.3%, the removal rate of sodium sulfate was as high as 94.2%, and the removal rate of sodium chloride was as high as 92.0%. A total of 0.086×10 3 kg sodium sulfate crystals, 0.091×10 3 kg of sodium chloride crystals, the equipment operates stably.

Embodiment 3

[0053] The water quality index of an industrial high-salt wastewater (No. 3) is shown in the table below:

[0054] Table 1 Water quality index of an industrial high-salt wastewater (No. 3)

[0055]

[0056] Using a method and device for synchronously removing sodium sulfate and sodium chloride in water with three cycles to treat industrial high-salt wastewater, the experimental results: 12m 3 After 24 hours of mixed wastewater operation, the zero discharge rate of wastewater was 99.9%, the average removal rate of COD was 77.4%, the removal rate of sodium sulfate was as high as 94.3%, and the removal rate of sodium chloride was as high as 96.1%. A total of 0.204×10 3 kg sodium sulfate crystals, 0.242×10 3 kg of sodium chloride crystals, the equipment operates stably.

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Abstract

The invention discloses a method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles. The method has the advantages of simple process flow, strong stability, high product purity, low energy consumption and the like. The method provided by the invention comprises the following steps: first cycle: sodium sulfate crystallization cycle; second cycle: sodiumchloride crystallization cycle; third cycle: sodium chloride similar ion cycle.

Description

technical field [0001] The invention relates to a wastewater treatment method, more specifically to a three-cycle method for synchronously removing sodium sulfate and sodium chloride in wastewater. Background technique [0002] High-salt wastewater has a wide range of sources, mainly concentrated in coal chemical industry, electric power, oil refining, chemical industry, metallurgy, papermaking, pharmaceutical, pesticide, fine chemical industry and other industries, as well as zero-discharge wastewater treatment process. With the development of modern industrial technology, the amount of high-salt wastewater has increased rapidly, which has brought great challenges to the current wastewater treatment and recycling technology. High-salt wastewater contains a variety of substances, including organic matter, inorganic salts, oil, organic heavy metals, and radioactive substances. Due to the high salt content, it is difficult for bacteria to survive, so it is difficult to treat w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/06C01D3/22C01D5/00
CPCC02F1/04C02F1/38C01D3/06C01D3/22C01D5/00C02F2201/007
Inventor 梅凯瞿超胡继中孙永军肖雪峰程松
Owner 江苏江中纪元科技有限公司
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