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Acrylic acid industry wastewater treatment process

A technology for industrial waste water and treatment process, which is applied in natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve problems such as difficult industrialization, incomplete degradation, and increased treatment costs. Achieve the effects of easy maintenance and management, convenient operation, and improved biodegradability

Inactive Publication Date: 2011-02-16
JIANGSU QINGHAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the wastewater contains substances that are toxic to microorganisms and lacks nutrients, biochemical methods are directly used to treat this type of wastewater, especially for high-concentration acrylic acid wastewater; and catalytic wet oxidation cannot completely degrade acrylic acid production wastewater. In addition, there are problems of catalyst failure and secondary pollution, and the reacted water still needs further treatment, which increases the treatment cost; the incineration method has problems such as high cost and large one-time investment, and it is difficult to promote industrialization

Method used

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Examples

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Embodiment 1

[0020] The wastewater from acrylic acid production flows through the sump to adjust the water volume, and then pumps it into the electrocatalytic oxidation device for reaction. The device uses carbon fiber as the cathode and cast iron as the anode. Most of the organic matter is removed or degraded in this device. The B / C of the effluent is changed from 0.01 Increased to 0.32, the electrocatalytic oxidation effluent enters the dechlorination pool, and the salts are effectively removed in the dechlorination pool, and the effluent of the dechlorination pool enters the comprehensive adjustment pool, adding 600m 3 For domestic sewage, adjust the water quality, water volume and pH. The effluent from the comprehensive adjustment tank enters the pulse anaerobic reaction tank. After 2 days of anaerobic treatment, the effluent enters the anaerobic stabilization tank for further anaerobic reaction. The effluent from the anaerobic stabilization tank enters the contact oxidation tank Aerobi...

Embodiment 2

[0026] The waste water from acrylic acid production flows through the sump to adjust the water volume, and then pumps it into the electrocatalytic oxidation device for reaction. The device uses carbon fiber as the cathode and cast iron as the anode. Most of the organic matter is removed in this device, and the B / C of the effluent is increased from 0.02 to 0.4, the effluent from electrocatalytic oxidation enters into the comprehensive regulating pool, adding 600m 3 For domestic sewage, adjust the water quality, water volume and pH. The effluent from the comprehensive adjustment tank enters the pulse anaerobic reaction tank. After 2 days of anaerobic treatment, the effluent enters the anaerobic stabilization tank for further anaerobic reaction. The effluent from the anaerobic stabilization tank enters the contact oxidation tank Aerobic treatment is carried out, and the treated wastewater enters the secondary sedimentation tank for mud-water separation, and the sedimented wastewat...

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Abstract

The invention discloses an acrylic acid industry wastewater treatment process, belonging to the field of wastewater treatment. The process comprises the following steps of: oxidizing acrylic acid production wastewater through electrocatalysis, leading the yielding water into a comprehensive adjusting tank, and adjusting water quality, water quantity and pH; leading the yielding water of the comprehensive adjusting tank into a pulse anaerobic reaction tank for anaerobic treatment; leading the yielding water of the pulse anaerobic reaction tank into a contact oxidation tank for aerobic treatment; and leading the treated wastewater into a secondary clarification tank for mud and water separation to finally obtain wastewater qualified to discharge. The traditional wastewater treatment process is optimized and combined once again, an electric hydrogenation and oxidation device is added before the anaerobic biochemical treatment, and a pulse anaerobic reacter is used for replacing the traditional anaerobic reaction tank. The invention has the advantages of simple treatment process and great treatment amount, the treatment efficiency is 2-3 times greater than that of the traditional acrylic acid wastewater recovery process, and the operating cost for treating each ton of wastewater only requires 5 yuan which is half that of the traditional acrylic acid wastewater recovery process.

Description

technical field [0001] The invention belongs to the field of waste water treatment and relates to a process for treating waste water in the acrylic acid industry. Background technique [0002] Acrylic acid and its esters are an important class of chemical raw materials. They can be homopolymerized by themselves or copolymerized with other vinyl monomers, such as styrene, vinyl acetate, methyl methacrylate, acrylonitrile, vinyl chloride, etc., to make various Acrylic resins or polyacrylates with different properties constitute a series of acrylic acid chemical products. These products are widely used in textile, chemical fiber, paint, leather, oil exploration, adhesives, building materials, water treatment and other industries. In recent years, acrylic acid (ester) has been highly valued by the chemical industry and has developed rapidly. However, a large amount of wastewater is produced at the same time. Wastewater contains acetic acid, methacrylic acid, acrylic acid, forma...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
Inventor 邵志军李洪芳
Owner JIANGSU QINGHAN ENVIRONMENTAL PROTECTION TECH
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