Comprehensive extraction and processing method of industrial wastewater

An industrial wastewater, comprehensive extraction technology, applied in heating water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc. , energy saving, considerable economic benefits

Inactive Publication Date: 2009-09-30
党葆和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] 1. The quality of the extract is poor, and only industrial crude products can be obtained;
[0009] 2. High energy consumption;

Method used

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  • Comprehensive extraction and processing method of industrial wastewater

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Experimental program
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Effect test

Embodiment

[0034] Embodiment: Taking the industrial wastewater containing sodium bromide, sodium acetate and methyl alcohol as an example, the treatment steps are as follows:

[0035] 1) Oxidation: In the oxidation kettle 1, at normal temperature, pass chlorine gas into the wastewater for oxidation until the pH is 7-0.5;

[0036] 2) esterification: then in esterification still 2, add industrial waste acid (hydrochloric acid) to carry out esterification reaction as catalyzer, waste acid add-on is 10wt% of waste water weight, in esterification still 2 internal esterification, the reaction time is 5-60 minutes, the reaction temperature is 55-65°C;

[0037] 3) Rectification: the reaction liquid in step 2) enters the middle part of the rectification tower 3, methyl acetate is fractionally distilled at the top of the tower at 55-58 °C, and methanol is separated at the upper middle part at 63-66 °C;

[0038] 4) Hydrolysis and distillation: Methyl acetate enters the hydrolysis and rectification...

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PUM

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Abstract

The present invention relates to a comprehensive processing technique of industrial wastewater, and specifically to the comprehensive extraction and processing method of industrial wastewater, wherein the industrial wastewater simultaneously comprises bromine, low molecular organic acid and low molecular alcohol. The invention is characterized in that the technique comprises the following steps: 1) oxidizing; 2) esterifying, 3) rectifying; 4) hydrolyzing and rectifying; 5) rectifying the bromine; 6) refining the bromine; 7) rectifying the hydrochloric acid; and 8) crystallizing the sodium chloride. Compared with the prior art, the method and technique of the invention have the advantages of easy control, energy consumption saving, obtainment of industrial product standard of each recycling object quality, high value, considerable economic benefit, basic realization of zero discharge of wastewater, and total obtainment of environmental requirement.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for comprehensive extraction and treatment of industrial wastewater. The invention is suitable for waste water treatment in chemical industry and medicine industry, especially the comprehensive extraction and environmental protection treatment of industrial waste water containing halogen, low molecular organic acid and its salt and low molecular alcohol. Background technique [0002] The prior art includes the following steps for the industrial wastewater treatment method containing bromine, low-molecular organic acid and salt and low-molecular alcohol: (taking methanol, sodium acetate, sodium bromide industrial wastewater as an example) [0003] 1) The rectification method separates the low methanol crude product; [0004] 2) Distill out the mixed solution of acetic acid and water after acidification. Add liquid caustic soda (NaOH aqueous solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01B7/09C01B7/01C01D3/08C02F1/76C02F1/04
Inventor 党葆和
Owner 党葆和
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