Salt-containing wastewater treatment method

A technology for salty wastewater and concentrated water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, ion-exchanged water/sewage treatment, etc. and other problems, to achieve the effect of short construction period, lower investment and investment saving.

Active Publication Date: 2014-06-04
BEIJING NEWBIOLINK TECH DEV
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  • Abstract
  • Description
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Problems solved by technology

[0004] Disadvantages: large investment, large land occupation, high operating costs, and large negative impact on the environment;
[0007] Disadvantages: Compared with traditional technology, it saves investment, but is still larger, occupies less land but is still larger, and has higher operating costs. The negative impact on the environment is slightly reduced, but there is no essential difference

Method used

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  • Salt-containing wastewater treatment method

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Embodiment Construction

[0036] The following takes the industrial park saline wastewater treatment project as an example to introduce.

[0037] (1) The flow rate is 30000m 3 / d saline wastewater (TDS≤2800mg / L, hardness≤1600mg / L) enters the regulating tank through the pipeline for simple adjustment and then enters the softening sedimentation tank. First, add lime water to the softening sedimentation tank for 10 minutes of reaction, settle for 30 minutes, and then Add sodium carbonate, react for 10 minutes, precipitate for 30 minutes, then add acid to adjust the pH to 6.5, and the supernatant flows into the multi-media filter;

[0038] (2) The liquid flow initially filtered by the multi-media filter enters the ultrafiltration device through the high-pressure pump, and the liquid flow filtered by the ultrafiltration membrane device enters the first section of the roll-type reverse osmosis system through the high-pressure pump;

[0039] (3) Concentrated water production of the first section of the roll ...

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Abstract

The invention discloses a salt-containing wastewater treatment method. The wastewater goes through an adjusting tank, a softening sedimentation tank, a multi-medium filter, an ultrafiltration device, a first-section roll type reverse osmosis system, a second-section roll type reverse osmosis system, an ion exchange device, a roll type nanofiltration membrane device, a high-pressure reverse osmosis membrane system, a third-section roll type reverse osmosis system and an efficient evaporator. The treatment method disclosed by the invention has the advantages of strong anti-pollution capacity, solution of blocking problem, high concentration multiple, high recycling efficiency, high treatment efficiency, high automation degree, investment saving and low operation cost.

Description

technical field [0001] The invention relates to a treatment method for salty wastewater, which belongs to the field of water treatment in environmental protection. Background technique [0002] At present, there are basically two options for the treatment of salty wastewater in chemical industry parks: traditional process and improved process. [0003] Traditional process: adopt traditional multi-media filter + ultrafiltration + two-stage roll reverse osmosis + evaporation pond process. In some projects, a roll-type reverse osmosis membrane system is actually used. With this traditional process, the system recovery rate is within 80%, and a large area of ​​evaporation pond is required to produce concentrated water. [0004] Disadvantages: large investment, large land occupation, high operating costs, and large negative impact on the environment; [0005] Improved process: It is an advanced process that has just emerged in China. It is based on a two-stage roll-type revers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/42C02F1/44
Inventor 郭强陈妍杜丹竹
Owner BEIJING NEWBIOLINK TECH DEV
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