Epichlorohydrin production wastewater treating method

A technology for epichlorohydrin and wastewater production, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problem that wastewater does not conform to the national pollution reduction policy and affects the economy of enterprises. Development and social benefits, non-compliance with environmental protection, energy conservation and emission reduction, etc., to achieve the effects of small footprint, short treatment time, and stable water output

Inactive Publication Date: 2016-01-27
广西钦州环科水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wastewater treated by the dilution-biochemical method does not comply with the national pollution reduction policy (fix the symptoms, not the root cause), while the evaporative desalination-biochemical method has the disadvantages of large equipment investment, high operating cost and rapid equipment loss, which does not meet the nation

Method used

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Examples

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Example Embodiment

[0029] Example 1

[0030] An epichlorohydrin production wastewater (the COD content in the wastewater is 10785ppm, and the inorganic salt content is 15128ppm) treatment method, comprising the following steps:

[0031] 1) Micro-electrolysis: Add acid solution to the wastewater produced in the production of epichlorohydrin, adjust the pH of the wastewater to 2, and then send it to the reaction tower filled with iron-carbon materials, uniformly aerate for 2 hours, and add acid solution during the period Stabilize the pH at 3 until the color of the wastewater becomes lighter, the COD drops to 7035ppm, and the dissolved salt content is 15128ppm, and the reaction ends;

[0032] 2) Deep oxidation: send the wastewater obtained in step 1) to a deep oxidation tower, adjust the pH of the wastewater to 3, and add oxidizer H 2 O 2 , The oxidant dosage is 6%, uniform aeration for 2 hours, deep oxidation, until the wastewater color becomes lighter than step 1), COD drops to 2800ppm, the dissolved s...

Example Embodiment

[0039] Example 2

[0040] An epichlorohydrin production wastewater (the COD content in the wastewater is 10785ppm, and the inorganic salt content is 15128ppm) treatment method, comprising the following steps:

[0041] 1) Micro-electrolysis: Add acid solution to the wastewater produced in the production of epichlorohydrin, adjust the pH of the wastewater to 2.5, and then send it to the reaction tower filled with iron-carbon materials, uniformly aerate for 1 hour, and add acid solution during the period Stabilize the pH at 2 until the color of the wastewater becomes lighter, the COD drops to 7035ppm, and the dissolved salt content is 15128ppm, and the reaction ends;

[0042] 2) Deep oxidation: send the wastewater obtained in step 1) to a deep oxidation tower, adjust the pH of the wastewater to 4, and add oxidizer H 2 O 2 , The oxidant dosage is 6%, uniform aeration for 2 hours, deep oxidation, until the wastewater color becomes lighter than step 1), COD drops to 2800ppm, the dissolved ...

Example Embodiment

[0049] Example 3

[0050] An epichlorohydrin production wastewater (the COD content in the wastewater is 10785ppm, and the inorganic salt content is 15128ppm) treatment method, comprising the following steps:

[0051] 1) Micro-electrolysis: Add acid solution to the wastewater produced in the production of epichlorohydrin, adjust the pH of the wastewater to 3, and then send it to the reaction tower containing iron-carbon materials, and evenly aerate for 2h, during which time the acid solution is added Stabilize the pH at 2.5 until the color of the wastewater becomes lighter, the COD drops to 7035ppm, and the dissolved salt content is 15128ppm, and the reaction ends;

[0052] 2) Deep oxidation: send the wastewater obtained in step 1) to a deep oxidation tower, adjust the pH of the wastewater to 3.5, and add oxidant H 2 O 2 , The amount of oxidant is 8%, uniform aeration for 2h, deep oxidation, until the color of wastewater becomes lighter than step 1), COD drops to 2800ppm, and the dis...

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Abstract

The invention discloses an epichlorohydrin production wastewater treating method. Multiple technologies such as micro-electrolysis, deep oxidation, flocculent settling, adsorption retardance, membrane separation and the like are specifically combined, epichlorohydrin wastewater is treated online in a targeted manner, the COD value can be significantly reduced, and the method is high in treatment rate and removal rate, has the obvious effect and can treat both current problems and root causes. Repeated experiments and detection analysis indicate that the wastewater contains 10,000-20,000 ppm of COD and about 15,000 ppm of soluble salts originally, the COD value is decreased below 100 ppm and the treatment rate is up to 98% after the technological treatment, approximately 7,000 ppm of the soluble salts are left, and the removal rate is up to 95%.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment, and in particular relates to a treatment method for epichlorohydrin production wastewater. Background technique [0002] Epichlorohydrin is an important organic synthesis intermediate and a product of organic fine chemicals. It is mainly used in the production of fine chemical products such as epoxy resin, synthetic glycerin, and chlorohydrin rubber. It has a wide range of uses, but in the production process A large amount of wastewater will be produced in the environment, and the wastewater contains a variety of complex organic compounds and a large amount of inorganic salts. The high-temperature chlorination of propylene is a classic method for the industrial production of epichlorohydrin, especially the domestic petrochemical and salt chemical industries have developed rapidly in recent years. The supply of propylene and chlorine gas is sufficient and the price is stable, w...

Claims

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Application Information

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IPC IPC(8): C02F9/12
Inventor 陆贻春冯晓东林强陆鸿
Owner 广西钦州环科水处理有限公司
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