Clean production process for treating organic waste mother solution by renewable targeted adsorption

A technology of adsorption treatment and clean production, applied in the direction of adsorption water/sewage treatment, special treatment targets, water/sewage treatment, etc., can solve the problems of long treatment cycle, waste of resources, large energy consumption, etc. , save treatment cost, reduce pollution effect

Inactive Publication Date: 2017-12-05
江苏博纳科水务环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods not only have a long treatment cycle and high energy consumption, but also increase the tail gas treatment load and emission concentration of the incinerator, and at the same time lead to the inability to effectively recover the high value-added organic substances in the organic waste crystallization mother liquor, resulting in a waste of resources
The above problems make the treatment continuity and cycle benefit of organic waste mother liquor poor, and the cost of environmental protection treatment is high

Method used

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  • Clean production process for treating organic waste mother solution by renewable targeted adsorption

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Embodiment 1

[0031] In this embodiment, a method of regenerable targeted adsorption treatment of organic waste mother liquor is applied to the clean production of bronopol waste crystallization mother liquor, including the following steps:

[0032] (1) One-step method prepares the discharge waste liquid of bronopol, and color is light yellow, and specific gravity is 1.25~1.35g / cm 3 . The waste liquid is sent to the distillation tower for distillation, concentration and crystallization, and the bronopol waste crystallization mother liquor obtained is sent to a regenerative targeted adsorption fixed bed device for targeted adsorption;

[0033] (2) Collect the flow-through liquid after being adsorbed by the renewable targeted adsorption fixed bed device and send it into the distillation tower, and distill and crystallize to obtain the finished product of sodium bromide, and the residual liquid at the bottom of the still is used as The crystallization mother liquor of hydroxymethylnitromethan...

Embodiment 2

[0041] In this embodiment, a method of regenerable targeted adsorption treatment of organic waste mother liquor is applied to the clean production of bronopol waste crystallization mother liquor, including the following steps:

[0042] (1) Two-step method prepares the discharge waste liquid of bronopol, and the color is brownish yellow, and specific gravity is 1.15~1.25g / cm 3 . Send the waste crystallization mother liquor to the renewable targeted adsorption fixed bed device for targeted adsorption;

[0043] (2) Collect the flow-through liquid after being adsorbed by the renewable targeted adsorption fixed bed device and send it into the distillation tower, and distill and crystallize to obtain the finished product of sodium bromide, and the residual liquid at the bottom of the still is used as The crystallization mother liquor of hydroxymethylnitromethane is returned to the synthesis process for reuse, and the gas phase is condensed to obtain condensed water, which is discha...

Embodiment 3

[0051] In this example, a method of regenerable targeted adsorption treatment of organic waste mother liquor is applied to the clean production of membrane separation mother liquor for treating caprolactam production wastewater, including the following steps:

[0052] (1) The organic waste water produced in the production process of caprolactam is prepared by the toluene method, and the membrane separation treatment is carried out through the reverse osmosis membrane separation device, and the waste water containing caprolactam, toluene, acetic acid and other impurities (a small amount of benzoic acid, hexahydrobenzoic acid, nitric acid) Base terephthalic acid) mother liquor is sent to the regenerative targeted adsorption fixed bed device for targeted adsorption;

[0053] (2) Return the flow-through liquid with low-concentration inorganic salts after being adsorbed by the regenerable targeted adsorption fixed-bed device to the reverse osmosis membrane separation device for reus...

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Abstract

The invention belongs to the technical field of wastewater treatment and particularly relates to a clean production process for treating an organic waste mother solution by renewable targeted adsorption. The clean production process comprises the steps: carrying out adsorption by using a targeted fixed bed adsorption device to obtain an overflow solution containing recyclable components, recycling the overflow solution to be recycled by a synthesis process after being treated or obtain an overflow solution having a low added value and containing easily-treated components, and discharging the overflow solution after carrying out simple biochemical treatment; after carrying out chromatography on an adsorbent, carrying out distillation to remove a solvent for recovery to obtain an organic matter with a high added value from a kettle residual solution; and after desorbing the adsorbent, carrying out distillation to remove the solvent for recovery to obtain an organic impurity with high concentration from the kettle residual solution, and discharging the organic impurity after carrying out incineration treatment. By using the clean production process, the pure organic matter is recovered from the organic waste mother solution, and recycle is realized; and meanwhile, the organic waste mother solution which is difficult to be subjected to biochemical and oxidation treatment is easily subjected to biochemical and oxidation treatment, sewage disposal and pollution are reduced, the treatment cost of the organic waste mother solution is reduced, economic benefits are generated, and clean production is realized.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a clean production process for producing waste water, in particular to a method for treating organic waste mother liquor. Background technique [0002] In the synthesis process of organic matter, after the effective components are extracted through evaporative crystallization and air stripping processes, a high concentration of organic waste crystallization mother liquor is often left, which enters the production wastewater treatment system for treatment. And some wastewater treatment processes, such as membrane separation technology and mechanical vapor recompression (MVR) technology, also leave high-concentration organic waste mother liquor in the system during treatment, which needs to be separated from the current process for additional treatment. [0003] At present, the treatment methods for organic waste mother liquor usually include environmental protectio...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F101/30
CPCC02F1/285C02F2101/30C02F2303/16
Inventor 吕志徐明徐心仪吕倩楠胡弘冰
Owner 江苏博纳科水务环保科技有限公司
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