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Method for treating and recycling heavy metal wastewater by double-membrane process

A heavy metal and double-membrane technology, applied in chemical instruments and methods, reduced water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of low recycling rate, ensure the quality of reused water, and reduce operating costs Effect

Inactive Publication Date: 2012-09-19
北京诚合盛环境科技有限公司
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Problems solved by technology

[0002] As we all know, a large amount of water will be used in the production process of heavy metals, such as copper, lead and zinc smelting, and a large amount of smelting wastewater will be generated after the smelting is completed. At present, these smelting wastewater is usually discharged after simple heavy metal precipitation treatment. Extremely low recycling rate

Method used

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  • Method for treating and recycling heavy metal wastewater by double-membrane process
  • Method for treating and recycling heavy metal wastewater by double-membrane process

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Embodiment Construction

[0027] Such as figure 1 Shown, the basic flow process of double-membrane process process heavy metal waste water and recycling method among the present invention is as follows:

[0028] 1. Pretreatment

[0029] 1-1. Precipitation pretreatment: heavy metal wastewater 1 is input to the pretreatment station, and then enters the primary backwater tank and adds sodium hypochlorite and flocculant to precipitate the heavy metals in the wastewater;

[0030] 1-2. The wastewater treated in step 1-1 is input into the multi-media filtration system through the lifting pump, and most of the suspended solids, colloids and part of COD in the wastewater are removed in the media filtration system; part of the effluent is input Ultrafiltration treatment in the ultrafiltration system, and the other part is used as multimedia filter backwash water. The ratio between the two can be determined according to the water recovery rate of the multimedia filter; in addition, the multimedia filter backwash...

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Abstract

The invention discloses a method for treating and recycling heavy metal wastewater by a double-membrane process, comprising the following steps of: treating the heavy metal wastewater by multi-medium pre-treatment, ultrafiltration treatment, first-stage reverse osmosis treatment and second-stage reverse osmosis treatment in sequence, so that the recovery rate of the wastewater is greatly increased, thus saving natural resources and reducing production cost.

Description

technical field [0001] The invention relates to a method for treating and recycling waste water produced in heavy metal smelting. Background technique [0002] As we all know, a large amount of water will be used in the production process of heavy metals, such as copper, lead and zinc smelting, and a large amount of smelting wastewater will be generated after the smelting is completed. At present, these smelting wastewater is usually discharged after simple heavy metal precipitation treatment. Recycling rates are extremely low. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide a double-membrane process for treating heavy metal wastewater and a recycling method, which effectively reduces the Reduced waste water discharge, greatly improved the recovery rate of waste water, reduced production costs and waste of resources. [0004] In order to achieve the above object, the double-membrane pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/44C02F5/08C02F1/70C02F101/20
Inventor 雷鹏举刘川李贵耀田福尹学智郭永忠尹佳
Owner 北京诚合盛环境科技有限公司
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