Treatment process of high-salt and high-organic waste liquid and waste liquid treatment equipment used

A treatment process and waste liquid treatment technology, applied in water/sewage treatment, multi-stage water/sewage treatment, heating water/sewage treatment, etc. Problems such as high moisture content, to achieve the effects of saving energy and water resources, efficient and stable heat transfer efficiency, and easy operation

Active Publication Date: 2020-09-01
SUZHOU ZHANQING ENVIRONMENT PROTECTION TECHCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) Poor biodegradability, BOD / COD value is less than 0.3;
[0006] (4) Complex composition and high toxicity;
[0011] It can only concentrate high-salt and high-organic waste liquid into viscous thick liquid, the concentrated liquid has high water content, the reduction is not complete, and the follow-up treatment is cumbersome;
[0012] The heat exchanger is easy to foul and block, and the heat exchange efficiency is low;
[0013] The system is difficult to run stably and requires regular manual cleaning

Method used

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  • Treatment process of high-salt and high-organic waste liquid and waste liquid treatment equipment used
  • Treatment process of high-salt and high-organic waste liquid and waste liquid treatment equipment used
  • Treatment process of high-salt and high-organic waste liquid and waste liquid treatment equipment used

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] The COD in waste liquid 10 produced by electroless nickel plating in a factory is 53900mg / L, and the solid content is 25.8%.

[0087] After the waste liquid 10 is preheated in the compounding tank 303, the temperature of the waste liquid 10 is higher than 70°C, and the compounding agent in the dispensing tank 304 is selected from a composition of sodium hydroxide, sodium sulfate and magnesium sulfate, wherein sodium hydroxide, sodium sulfate and The mass ratio of magnesium sulfate is 2:3:5. The preparation agent and steam condensate 14 are fully stirred and mixed to form a preparation agent. The dosage of the preparation agent is calculated according to the following formula:

[0088] Dosing amount of compounding agent=5.7*COD of waste liquid-original TDS of waste liquid;

[0089] Add the preparation agent to the preparation tank 303 according to the above-mentioned dosage, adjust the pH of the waste liquid 10 to 6, and the prepared waste liquid 10 is processed by the d...

Embodiment 2

[0091] The content of organic matter in the waste liquid 10 produced by a zinc-nickel alloy factory is 113800mg / L, and the solid content is 20.7%.

[0092] After the waste liquid 10 is preheated in the preparation tank 303, the temperature of the waste liquid 10 is higher than 80°C. The preparation agent in the dispensing tank 304 is a mixture of sodium silicate and magnesium sulfate with a mass ratio of 1:1. The preparation agent and steam The condensed water 14 is fully stirred and mixed to form a preparation agent, and the dosage of the preparation agent is calculated according to the following formula:

[0093] Dosing amount of preparation = 2.3* COD of waste liquid - TDS of waste liquid;

[0094] Add the preparation agent to the preparation tank 303 according to the above-mentioned dosage, adjust the pH of the waste liquid 10 to 14, and the prepared waste liquid 10 is processed by the drying integrated equipment 1 to obtain a strip-shaped solid material 11. The moisture c...

Embodiment 3

[0096] The COD in waste liquid 10 produced by nanofiltration of organophosphorus wastewater in a factory is 6320mg / L, the total phosphorus is 623mg / L, and the solid content is 7.2%.

[0097] After the waste liquid 10 is preheated in the preparation tank 303, the temperature of the waste liquid 10 is higher than 80°C. The preparation agent in the preparation tank 304 is ferrous sulfate, and the preparation agent is fully stirred and mixed with the steam condensate 14 to form a preparation agent. Dosage is calculated according to the following formula:

[0098] Dosing amount of preparation = 14* COD of waste liquid - TDS of waste liquid;

[0099] Add the preparation agent to the preparation tank 303 according to the above dosage, adjust the pH of the waste liquid 10 to 8, and the prepared waste liquid 10 is processed by the drying integrated equipment 1 to obtain a strip-shaped solid material 11. The moisture content of the solid material 11 is 9.0%, the melting temperature Tm ...

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Abstract

The invention discloses a treatment process of high-salt and high-organic waste liquid and the used waste liquid treatment equipment. The treatment process is as follows: heating the waste liquid to a temperature of 60-90°C, adding a compound that can increase TDS or reduce COD to the waste liquid Blending agent, and make the pH of the waste liquid>5; send the waste liquid into the drying machine to dry into solid material, and its processing equipment includes a blending tank, a raw liquid pump, a waste liquid pump, a first heat exchanger, a dispensing tank, and a dosing tank. Pumps, drying machines, equipment drainage pipes and control systems, the waste liquid is sent into the blending tank through the raw liquid pump, the dosing pump sends the prepared compounding agent in the compounding tank into the blending tank, and the first heat exchanger feeds the blending tank The internal waste liquid is heated to the specified temperature, and the waste liquid pump sends the waste liquid prepared in the blending tank into the dryer. The control system controls the operation of the dryer and the waste liquid pump and controls the start and stop of the raw liquid pump and the dosing pump. , the present invention can realize near-zero discharge of waste liquid, greatly reducing the complexity and cost of high-salt and high-organic waste water treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment process for high-salt and high-organic waste liquid and used waste liquid treatment equipment. Background technique [0002] With the continuous and rapid development of industrialization, industries such as coal chemical industry, printing and dyeing, papermaking, pharmaceutical and electroplating have produced a large amount of waste liquid containing high salt and high organic matter. This type of waste liquid has the following characteristics: [0003] (1) High salt content, with a salt content as high as tens of thousands or even hundreds of thousands of milligrams per liter; [0004] (2) The concentration of organic matter is high, usually greater than 2000 mg per liter, or even as high as tens of thousands of mg per liter; [0005] (3) Poor biodegradability, BOD / COD value is less than 0.3; [0006] (4) Complex composition and high toxicity; [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/30C02F101/10
CPCC02F1/00C02F1/04C02F2101/10C02F2101/30
Inventor 王磊叶小兵周文慧丁健刘振兴周健
Owner SUZHOU ZHANQING ENVIRONMENT PROTECTION TECHCO LTD
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