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Treatment method of high-concentration high-salt methanol organic wastewater

A technology of organic wastewater and treatment methods, applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problems of large amount of hazardous waste, poor treatment effect, low treatment rate, etc., and achieve low investment cost , It is not easy to coke and foam, and the effect of low processing cost

Active Publication Date: 2021-11-23
江苏南大华兴环保科技股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of high energy consumption for oxidation and easy production of a large amount of hazardous waste salt and waste methanol in the existing high-concentration and high-salt methanol organic wastewater treatment process, the present invention provides a treatment method for high-concentration and high-salt methanol organic wastewater. Wastewater is subjected to stripping, wet catalytic oxidation, resin adsorption, distillation, and biochemical treatment to rationally and effectively treat the organic matter in the wastewater. The by-product salt obtained from the treated effluent is of high purity, and the final effluent meets the discharge standard of the park, realizing waste treatment with waste The purpose of solving the problems of low treatment rate, poor treatment effect and large amount of hazardous waste in the prior art

Method used

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  • Treatment method of high-concentration high-salt methanol organic wastewater
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  • Treatment method of high-concentration high-salt methanol organic wastewater

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Embodiment 1

[0038] The invention provides a treatment method for high-concentration and high-salt methanol organic wastewater, the treatment process is as follows:

[0039] S100. The organic wastewater is stripped. As a specific embodiment, the organic wastewater is stripped by a stripper to obtain methanol recovery liquid and stripped water; wherein, the temperature at the bottom of the stripper is 115-125° C. , the top pressure of the tower is 20-30MPa, and the liquid level at the bottom of the tower is 40%-60%. Tanks and other storage devices, and as the resin desorption liquid in the resin adsorption process of the present invention or the carbon source in the biochemical treatment, and then reused in the process flow of the present invention; The desorption liquid generated later can also be further treated by mixing with stripped water and then performing wet catalytic oxidation, which will not generate additional pollution or be treated by other processes, and the treatment efficie...

Embodiment 2

[0058] The basic content of this embodiment is the same as that of Example 1, and the difference is that in this embodiment, the organic waste water treated is the production waste water produced in the production process of azoxystrobin in a certain pesticide production enterprise in Jiangsu, and the treatment process is as follows:

[0059] S100, stripping the organic waste water, the temperature at the bottom of the stripping tower is 115°C, the pressure at the top of the tower is 20MPa, and the liquid level at the bottom of the tower is 60%;

[0060] S200. Mix the stripped water, distillation still residue and resin desorption solution to carry out wet catalytic oxidation. The reaction temperature is 150°C, the reaction pressure is 3.2MPa, and the reaction time is 2h;

[0061] S300, the wet catalytic oxidation effluent is subjected to resin adsorption to remove macromolecular organic matter, the wastewater flow rate is 20BV, the flow rate is 2.0BV / h, and the pH is 4;

[00...

Embodiment 3

[0068] The basic content of this embodiment is the same as that of Example 1, and the difference is that in this embodiment, the organic waste water treated is the production waste water produced in the production process of azoxystrobin in a certain pesticide production enterprise in Jiangsu, and the treatment process is as follows:

[0069] S100, stripping the organic waste water, the temperature at the bottom of the stripping tower is 125°C, the pressure at the top of the tower is 30MPa, and the liquid level at the bottom of the tower is 40%;

[0070] S200, after mixing the stripped water, the residue of the distillation pot and the resin desorption liquid, perform wet catalytic oxidation, the reaction temperature is 280°C, the reaction pressure is 6.0MPa, and the reaction time is 5h;

[0071] S300, the wet catalytic oxidation effluent is subjected to resin adsorption to remove macromolecular organic matter, the wastewater flow rate is 10BV, the flow rate is 1.0BV / h, and the...

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a treatment method of high-concentration high-salt methanol organic wastewater. The wastewater is sequentially subjected to steam stripping, wet catalytic oxidation, resin adsorption, distillation and biochemical treatment. Methanol recovery liquid generated in the wastewater treatment process can also be used as a resin regeneration liquid and / or a carbon source, a byproduct sodium chloride salt can be obtained by distilling the treated effluent, and meanwhile, the wet catalytic oxidation can also be used for oxidation treatment of the resin regeneration liquid and distillation still residues. According to the invention, organic matter in wastewater can be reasonably and effectively treated, the final effluent reaches the discharge standard of a park, the purpose of treating waste with waste is realized, and the problems of low treatment rate, poor treatment effect and large hazardous waste output in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and more specifically relates to a treatment method for high-concentration and high-salt methanol organic wastewater. Background technique [0002] Chemical companies will produce a large amount of high-concentration and high-salt methanol organic wastewater. This type of wastewater has a high methanol content, and methanol wastewater is a high-concentration refractory wastewater with a strong pungent smell. When its concentration reaches 800mg / L, it can cause aquatic organisms to die. die. The common method is rectification to recover methanol, but at present, the wastewater discharged from the bottom of the domestic methanol rectification main tower generally contains about 1% methanol, and some reach more than 2%, which seriously pollutes the environment. In addition, due to the existence of low boiling point substances in wastewater, the purity of methanol recovered by rectification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/30C02F101/34C02F103/36
CPCC02F9/00C02F2101/10C02F2101/34C02F2101/30C02F1/10C02F1/725C02F1/285C02F1/048C02F3/00C02F2209/02C02F2209/03C02F2209/42C02F2209/08C02F2303/16C02F2103/36C02F2209/40
Inventor 程夫苓赵选英杨峰戴建军胡静
Owner 江苏南大华兴环保科技股份公司
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