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Treatment method for liquid waste from production of plasticizer for chemical industry

A treatment method and plasticizer technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve environmental pollution and other problems

Inactive Publication Date: 2015-05-13
梁亨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for treating waste liquid produced by chemical plasticizers. The recycling method can effectively make the waste liquid harmless, thereby solving the problem of environmental pollution caused by the waste liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The processing method of plasticizer production waste liquid of this chemical industry comprises the following steps:

[0018] A. Put the waste liquid to be treated in the grease trap, add 0.1 times of 36% hydrochloric acid, stir for 2 hours at a speed of 100 rpm, then let stand and separate the oil to obtain the first treatment liquid;

[0019] B. Heating the first treatment liquid prepared in step A to 75° C., and then passing the hydrophobic polypropylene hollow fiber membrane at a flow rate of 20 L / h to obtain the second treatment liquid;

[0020] C, put the second treatment liquid into the neutralization tank, neutralize it, make its pH value to 7, and make the third treatment liquid;

[0021] D. Pass the third treatment solution into the aerobic biological treatment tank with a flow rate of 3L / h; obtain the fourth treatment solution;

[0022] E. Decolorizing the fourth treatment solution to obtain the fifth treatment solution.

[0023] After being treated in thi...

Embodiment 2

[0025] The processing method of plasticizer production waste liquid of this chemical industry comprises the following steps:

[0026] A. Put the waste liquid to be treated in the grease trap, add 0.2 times of 36% hydrochloric acid, stir at a speed of 100 rpm for 0.5 hour, then let stand and separate the oil to obtain the first treatment liquid;

[0027] B. Heating the first treatment liquid prepared in step A to 80° C., and then passing the hydrophobic polypropylene hollow fiber membrane at a flow rate of 15 L / h to obtain the second treatment liquid;

[0028] C. Put the second treatment liquid into the neutralization tank, neutralize it to make the pH value reach 7.5, and obtain the third treatment liquid;

[0029] D, the third treatment solution is passed into the aerobic biological treatment tank with a flow rate of 5L / h for treatment; the fourth treatment solution is obtained;

[0030] E. Decolorizing the fourth treatment solution to obtain the fifth treatment solution.

...

Embodiment 3

[0033] The processing method of the plasticizer production waste liquid of this chemical industry comprises the following steps:

[0034] A. Put the waste liquid to be treated in the grease trap, add 0.15 times of 36% hydrochloric acid, stir for 1 hour at a speed of 100 rpm, then let stand and separate the oil to obtain the first treatment liquid;

[0035] B. Heating the first treatment solution prepared in step A to 78° C., and then passing the hydrophobic polypropylene hollow fiber membrane at a flow rate of 18 L / h to obtain the second treatment solution;

[0036] C. Put the second treatment solution into the neutralization tank, neutralize it to make its pH value reach 7, and prepare the third treatment solution;

[0037] D, the third treatment solution is passed into the aerobic biological treatment tank with a flow rate of 4L / h for treatment; the fourth treatment solution is obtained;

[0038] E. Decolorizing the fourth treatment solution to obtain the fifth treatment so...

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PUM

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Abstract

The invention discloses a treatment method for liquid waste from production of a plasticizer for chemical industry, and belongs to the technical field of liquid waste treatment. According to the treatment method, to-be-treated liquid waste is subjected to procedures including oil separation treatment, neutralization, aerobic treatment and decoloration, harmful substances contained in the to-be-treated liquid waste are separated out, and harmlessness of the liquid waste is achieved finally.

Description

technical field [0001] The invention relates to the technical field of waste liquid treatment, in particular to a method for processing waste liquid produced by chemical plasticizers. Background technique [0002] The chemical industry is one of the main industries that utilize and consume water resources in my country. It needs steam injection water, cooling water, and production water as various solvents in the production process. Its characteristic is that the water consumption and displacement are very large. [0003] Plasticizer is one of the chemical products, which can be divided into phthalates, fatty acid esters, phosphates, polyesters, epoxy esters and chlorine-containing compounds. Although the use of plasticizer plays a great role in the plastic production process, it will produce a large amount of harmful waste liquid in the production process. If it is not treated effectively, it will cause serious environmental pollution. It will also affect its application i...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 梁亨
Owner 梁亨