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Saline wastewater zero-discharge treatment device and treatment method

A technology of salt-containing wastewater and treatment device, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. To meet the standards and other issues, to achieve the effect of saving processing costs, saving investment costs, saving resources and funds

Inactive Publication Date: 2017-06-20
广东浦华环保科技有限公司
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Problems solved by technology

For example, thermal power plants generally adopt the traditional three-box process, which cannot handle chloride ions, and most of the desulfurization wastewater cannot be treated up to the standard
The desulfurization wastewater treated by the three-box process still contains salts such as sodium chloride and sodium sulfate, and even organic matter such as oil, which still cannot meet the requirements

Method used

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  • Saline wastewater zero-discharge treatment device and treatment method

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing.

[0015] Such as figure 1 As shown, a zero-discharge treatment device for saline wastewater is based on the original treatment process through an electrodialysis system or other concentration devices that apply the principle of electric drive, osmosis, and reverse osmosis (electrodialysis system, reverse osmosis, super Reverse osmosis, RO, super RO, DTRO, etc.) and other concentration means concentrate the salty wastewater after treatment, and then use the thermal energy of thermal power plants, chemical plants, ceramics and other enterprises (provided by self-provided boilers or self-provided power plants) Or purchased exhaust steam or waste heat steam, electric energy, etc.), and finally realize zero discharge of salty wastewater by low-temperature MVR drying method. The saline wastewater treatment system is connected to the waste water tank 1, one end of the biofilter 2 i...

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Abstract

The invention discloses a saline wastewater zero-discharge treatment device and treatment method. A saline wastewater treatment system is connected with a waste water tank; one end of a bacteria filter is connected with the waste water tank, and the other end is connected with a pretreatment device of a concentration equipment; the concentration equipment is connected with a concentrated water tank; an reagent adding device is connected with the concentrated water tank; the concentrated water tank is connected with an evaporation drying device via a concentrated water pump, and the other end of the evaporation drying device is connected with a condensate water collecting device. The saline wastewater zero-discharge treatment device is capable of realizing utilization of existing equipment, saving resources, reducing cost, realizing zero discharge via adding of few devices, and is suitable for most coal-fired power plants and chemical plants; concentrated water is delivered into a low-temperature MVR equipment for evaporation; obtained desalted water is recycled to other systems or is discharged; treatment cost is reduced greatly; industrial salt for sale is obtained via low-temperature MVR drying.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a zero-discharge treatment device and a treatment method for saline wastewater. Background technique [0002] At present, the wastewater produced by many industries has the characteristics of saline wastewater, such as the desulfurization wastewater produced by the desulfurization system of the wet desulfurization FGD device in thermal power plants; the bottom liquid produced by the synthesis and other processes of the chemical industry. Saline wastewater can contain a variety of salts, including heavy metal ions, or some anions restricted by national discharge standards, which cannot be discharged directly. In addition, the salt in the saline wastewater has certain value and can be recycled. The salty wastewater usually affects the operation of the biochemical system, and is corrosive or can accelerate the corrosion of the metal parts of the system. It is very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 湛永航邓仲元王万童陈云海
Owner 广东浦华环保科技有限公司
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