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High-concentration organic salt-containing wastewater treatment method adopting steam recompression technology

A technology for steam recompression and salty wastewater, applied in water/sewage multi-stage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. The effect of saving energy and reducing treatment costs

Active Publication Date: 2015-01-14
JIANGSU QUANNENG ELECTROMECHANICAL EQUIP ENG LTD BY SHARE LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, this multi-effect evaporation and crystallization treatment method needs to continuously feed raw steam into the multi-effect evaporator as a heat source for wastewater concentration, which requires a lot of energy consumption and high cost.

Method used

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  • High-concentration organic salt-containing wastewater treatment method adopting steam recompression technology
  • High-concentration organic salt-containing wastewater treatment method adopting steam recompression technology
  • High-concentration organic salt-containing wastewater treatment method adopting steam recompression technology

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] like figure 1 As shown, the method for treating high-concentration organic saline wastewater using steam recompression technology of the present invention includes the following steps.

[0036] The first step is preprocessing;

[0037] Use the filter screen to pre-treat the waste water by filtering the filter residue to remove impurities and suspended solids in the waste water.

[0038] The second step is to carry out oxidation treatment;

[0039] The pretreated wastewater is sent into the oxidation tower, and ozone is passed into the oxidation tower at the same time, and the wastewater is oxidized by ozone, so that the content of organic matter in the wastewater is reduced to about 15%.

[0040] like figure 2 As shown, the equipment required for the preparation of ozone fed into the oxidation tower includes an oil-free air compressor, a buffer ta...

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Abstract

The invention relates to a wastewater treatment method, in particular to a high-concentration organic salt-containing wastewater treatment method adopting the steam recompression technology. The high-concentration organic salt-containing wastewater treatment method is characterized by comprising the steps of pretreatment, evaporation concentration, evaporation crystallization, crystallization separation and the like, wherein the evaporation concentration step is implemented according to the steam recompression technology: conveying wastewater into a mechanical recompression evaporator and concentrating the wastewater into a saline saturated or over-saturated solution through steam heating. According to the method, live steam is only fed into the mechanical recompression evaporator at the initial use, and the mechanical recompression evaporator can be used for recompressing secondary steam produced by wastewater evaporation, so that enough heat sources can be supplied to concentration of the subsequent fed wastewater, and the live steam is not required to be fed at the subsequent use; therefore, the energy can be greatly saved, and the treatment cost can be reduced.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating high-concentration organic salt-containing wastewater by using steam recompression technology. Background technique [0002] As we all know, high-concentration organic salt-containing wastewater is a difficult problem in wastewater treatment. It is used in petroleum, chemical, food, waste liquid treatment, intermediates (intermediates are also called organic intermediates, which use coal tar or petroleum products as raw materials to manufacture dyes, Pesticides, pharmaceuticals, resins, additives, plasticizers, etc.) are widely used in many industries. The salt content of high-concentration organic saline wastewater is usually as high as more than 10%, and the organic content even exceeds 40%. [0003] The traditional method for treating high-concentration organic saline wastewater is a multi-effect evaporation crystallization treatment method. Its steps are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/04C02F1/38
Inventor 张建平蒋岳盘汤勇振许志群
Owner JIANGSU QUANNENG ELECTROMECHANICAL EQUIP ENG LTD BY SHARE LTD
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