Solid-liquid separation process for fluorescent whitening slurry wastewater

A technology for solid-liquid separation and whitening slurry, which is applied in the field of solid-liquid separation of fluorescent whitening slurry wastewater, can solve the problems of difficult treatment of emulsified oil wastewater, effective treatment methods and high treatment costs, and achieves reduction in post-treatment. Burden, simplified post-processing, reduced COD effect

Active Publication Date: 2021-11-09
奥仕集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the methods used in the above inventions and existing patents are difficult to treat emulsified oil wastewater due to high treatment costs or poor effects, especially for high-concentration fluorescent osmotic emulsified oil wastewater. Approach

Method used

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  • Solid-liquid separation process for fluorescent whitening slurry wastewater
  • Solid-liquid separation process for fluorescent whitening slurry wastewater
  • Solid-liquid separation process for fluorescent whitening slurry wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A solid-liquid separation process for fluorescent whitening slurry wastewater, the operation steps are:

[0033] First, pump 800g of fluorescent whitening slurry wastewater into the heating reactor and heat to 70°C. After heating and stirring for 1h, add hydrochloric acid to adjust the pH to pH8, add 1.2g of demulsifier, then add 0.05g of coagulant, and heat to 80°C. ℃, heated and stirred for 30 minutes, and then placed in a centrifuge for solid / liquid separation after treatment. The clarified liquid is filtered through sand and then filtered through activated carbon adsorption.

[0034] The mass fraction of the hydrochloric acid is 10%.

[0035] The added demulsifier is compounded by PAC and PAM, and its synthetic ratio is 30:1.

[0036] The preparation method of described coagulation aid is:

[0037] 17g of diallyldimethylammonium chloride, 2.2g of castor oil maleate, and 0.02g of aluminum acrylate are added to the reaction kettle, and high-purity nitrogen protecti...

Embodiment 2

[0040] A solid-liquid separation process for fluorescent whitening slurry wastewater, the operation steps are:

[0041] First, pump 800g of fluorescent whitening slurry wastewater into the heating reactor and heat to 75°C. After heating and stirring for 1 hour, add hydrochloric acid to adjust the pH to pH8, add 2g of demulsifier, then add 0.15g of coagulant aid, and heat to 80°C , heated and stirred for 30 minutes, and then placed in a centrifuge for solid / liquid separation after treatment. The clarified liquid is filtered through sand and then filtered through activated carbon adsorption.

[0042] The mass fraction of the hydrochloric acid is 12%.

[0043] The added demulsifier is compounded by PAC and PAM, and its synthetic ratio is 20:1.

[0044] The preparation method of described coagulation aid is:

[0045] 20g of diallyldimethylammonium chloride, 3g of castor oil maleate, and 0.1g of aluminum acrylate are added to the reaction kettle, and high-purity nitrogen protect...

Embodiment 3

[0049] A solid-liquid separation process for fluorescent whitening slurry wastewater, the operation steps are:

[0050] First, pump 800g of fluorescent whitening slurry wastewater into the heating reactor and heat to 75°C. After heating and stirring for 1h, add hydrochloric acid to adjust the pH to pH8, add 2.4g of demulsifier, then add 0.2g of coagulant, and heat to 80 ℃, heated and stirred for 30 minutes, and then placed in a centrifuge for solid / liquid separation after treatment. The clarified liquid is filtered through sand and then filtered through activated carbon adsorption.

[0051] The mass fraction of the hydrochloric acid is 14%.

[0052] The added demulsifier is compounded by PAC and PAM, and its synthetic ratio is 15:1.

[0053] The preparation method of described coagulation aid is:

[0054] 22g of diallyldimethylammonium chloride, 3.5g of castor oil maleate, and 0.2g of aluminum acrylate are added to the reaction kettle, and high-purity nitrogen protection is...

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Abstract

The invention relates to the technical field of wastewater treatment, and concretely relates to a solid-liquid separation process for fluorescent whitening slurry wastewater. According to the solid-liquid separation process for the fluorescent whitening slurry wastewater, the fluorescent whitening slurry wastewater can be economically and effectively subjected to solid-liquid separation, COD in liquid is greatly reduced, and the post-treatment burden of the liquid part is reduced; and post-treatment of the solid part is simplified. The process is simple, solid-liquid separation is thorough, and the operation cost is low.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a solid-liquid separation process for fluorescent whitening slurry wastewater. Background technique [0002] Fluorescent whitening agent is resistant to chlorine bleaching agent, oxygen bleaching agent and strong acid and strong alkali, and is widely used in textile, papermaking, coating, detergent, printing, ink and other fields. A large amount of wastewater will be produced in the production process. This wastewater is a special type of high-concentration, refractory organic wastewater. The COD of the wastewater is 5000-6000mg·L-1, and it has a pungent odor. Wastewater contains a large amount of benzene and its derivatives. These organic substances have substituent groups such as amino, nitro and sulfonic acid groups, and are highly toxic. In addition, wastewater contains a large amount of refractory biodegradable substances, and its biodegradability is very poor....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/52C02F1/54C02F1/56C02F101/30C02F103/34
CPCC02F9/00C02F1/5236C02F1/56C02F1/54C02F1/02C02F1/66C02F1/38C02F1/001C02F1/283C02F2101/30C02F2103/34
Inventor 宁星星宁静赵超越周开丰戴雪珍
Owner 奥仕集团有限公司
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