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Acrylate production wastewater treatment process method

A technology for the production of wastewater and acrylates, applied in multi-stage water treatment, natural water treatment, heating water/sewage treatment, etc. problems, to achieve the effect of reducing the cost of incineration treatment, reducing the content of COD, and reducing the output of COD

Pending Publication Date: 2022-04-26
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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Problems solved by technology

However, due to the presence of light component acids and alcohols in the process of treating wastewater from acrylate production, the COD of the evaporated water can reach 20,000-35,000 mg / L, and the separation effect of water and COD cannot be achieved, which makes the biochemical treatment of the water difficult.
[0004] CN105236649A discloses a method for treating acrylate wastewater and recovering sodium acrylate. The method is pretreatment + coagulation precipitation + ion exchange + pH adjustment + evaporation treatment + cooling crystallization + biochemistry. This method can recover part of the sodium acrylate solid, but The treatment process is complicated, and there are problems of ion exchange resin regeneration, regeneration wastewater and spent resin disposal

Method used

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  • Acrylate production wastewater treatment process method

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Embodiment 1

[0025] The output of acrylate production process wastewater in a refinery in Guangdong is about 8m 3 / h, COD is 70000-120000mg / L, the original treatment process is incineration treatment technology, and the treatment cost per ton of water is 600-700 yuan, which is extremely high. At present, the company plans to upgrade the existing technology to reduce production and processing costs.

[0026] The wastewater treatment process for acrylate production of the present invention is used to reduce the amount of wastewater, wherein the multi-effect evaporation system is a three-effect evaporation treatment system. The raw water COD was measured to be 89000mg / L, and the raw water inflow was 7.5m 3 / h, the first-effect evaporation water production is 0.9m 3 / h, the COD measurement result of the produced water is 125000mg / L, the pH is adjusted to 8.7 by adding alkali, the amount of alkali added is 132kg / h, and the mother liquor output is 1m 3 / h, the production of water 2 is 5.5m 3...

Embodiment 2

[0028] The above-mentioned acrylate production process wastewater of a refinery in Guangdong was used as raw water. The raw water COD was measured as 97000mg / L, and the raw water inflow was 7.3m 3 / h, the first-effect evaporation water production is 0.8m 3 / h, the COD measurement result of the produced water is 143000mg / L, the pH is adjusted to 8.3 by adding alkali, the amount of alkali added is 136kg / h, and the mother liquor output is 0.8m 3 / h, the production of water 2 is 5.5m 3 / h, the COD content of the product water 2 is 2304mg / L, and the product water 2 enters the biochemical system for treatment.

Embodiment 3

[0030] The above-mentioned acrylate production process wastewater of a refinery in Guangdong was used as raw water. The raw water COD was measured as 125000mg / L, and the raw water inflow was 7.6m 3 / h, the first-effect evaporation water production is 0.8m 3 / h, the COD measurement result of the produced water is 164000mg / L, the pH is adjusted to 8.3 by adding alkali, the amount of alkali added is 143kg / h, and the mother liquor output is 0.8m 3 / h, the yield of product water 2 is 5.6m 3 / h, the COD content of the product water 2 is 2304mg / L, and the product water 2 enters the biochemical system for treatment.

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Abstract

The invention discloses a treatment process of acrylic ester production wastewater. A traditional acrylic ester production wastewater treatment method is incineration treatment, the treatment cost of the method is extremely high, and the treatment cost of each ton of water can reach more than 600 yuan. The acrylic ester production wastewater is subjected to concentration and decrement treatment by using a multi-effect evaporation treatment technology, the incineration treatment amount of the wastewater can be effectively reduced, the treatment cost is reduced, and the distilled water has the characteristics of low COD (Chemical Oxygen Demand) content and good biochemical effect.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a process method for treating waste water from acrylate production. Background technique [0002] Acrylate production wastewater contains a large amount of acid-containing organic substances such as formic acid and acetic acid, and aldehyde organic substances such as formaldehyde. The COD content can even reach more than 100,000 mg / L. The traditional thermal incineration wastewater treatment process mostly adopts the traditional thermal incineration wastewater treatment process, but the incineration treatment technology consumes high energy and the treatment cost is extremely high, and the treatment cost per ton of water can reach more than 600 yuan. [0003] CN113429048A discloses a method in which a certain amount of alkali is added to high-concentration aldehyde-containing acrylic acid wastewater, and the collected fractions can be sent to a wastewater device f...

Claims

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Application Information

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IPC IPC(8): C02F9/10F23G7/04F23G5/44C02F103/36
CPCC02F1/04C02F1/66F23G7/04F23G5/446F23G5/44C02F2103/36C02F2301/08
Inventor 李亚宁李亮郝亚超张成凯付春明郝润秋肖彩英刘祺师晓光周立山靳晓霞
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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