Wastewater treatment method

A waste water treatment and waste water technology, which is applied in gaseous discharge waste water treatment, multi-stage water treatment, water/sewage treatment and other directions, can solve the problem of high steam consumption and power consumption, high evaporation and crystallization treatment cost, and difficult to guarantee the purity of crystalline salt. and other problems, to achieve the effect of eliminating the cost of solid waste disposal, improving the utilization rate of water resources, and reducing the cost of dosing

Inactive Publication Date: 2020-02-21
SUNUP ENVIRONMENTAL TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] 1) The cost of pretreatment chemical softening and dosing is high. According to calculations, the cost of water softening chemical per ton is 20-30 yuan / m 3 about;
[0006] 2) It is difficult to guarantee the purity of crystallized salt after evaporation. When the purity is low, it can only be treated as solid waste (hazardous waste), which increases the cost of per ton of water treatment;
[0007] 3) Evaporation and crystallization treatment costs are high, steam consumption and power consumption are high, and treatment costs are high, etc.

Method used

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] It should be noted that when it is referred to as being "fixed to" another, it can be directly on the other or there can be an intervening one as well. When one is said to be "connected" to another, it may be directly connected to the other or there may be both. When one is said to be "set on" the other, it can be set directly on the other or there may be both. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein...

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Abstract

The invention discloses a wastewater treatment method. Wastewater is recycled and used after steps of magnesium ion removal, calcium ion removal, filtration concentration, pH correction, reverse osmosis and ash mixing treatment. The wastewater treatment method has low cost of softening chemicals, no evaporation crystallization is needed, and the wastewater has a high water resource utilization rate.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a wastewater treatment method. Background technique [0002] At present, among various desulfurization methods in thermal power plants, boiler flue gas wet desulfurization accounts for an increasing proportion due to its high desulfurization efficiency, but the disadvantage of this process is that waste water is generated, and the pH value of waste water is 5-6 At the same time, it contains a large amount of suspended matter (gypsum particles, SO2, hydroxides of Al and iron), fluorides and heavy metal elements such as As, Cd, Cr, Cu, Hg, Ni, Pb, Sb, Se, Sn, Zn, etc. Domestic power plants mostly adopt wet limestone-gypsum treatment process for desulfurization. The flue gas contains a small amount of F-, Cl- and various impurities brought from the raw coal. After entering the desulfurization absorption tower, it is washed down and enters the slurry. The joint action of F- a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F103/18
CPCC02F9/00C02F2103/18C02F2101/10C02F2301/08C02F1/00C02F1/001C02F1/66C02F1/441
Inventor 谭斌谈宾宾方毓淳黄传敏
Owner SUNUP ENVIRONMENTAL TECH CO LTD
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