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A desulfurization wastewater bypass flue evaporation treatment process and system

A technology for bypassing the flue and desulfurization wastewater, which is applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., and can solve the problem of high salt content, corrosiveness, and complex composition of desulfurization wastewater. problems, to achieve good market prospects and competitiveness, small footprint, and high space utilization

Active Publication Date: 2021-10-22
LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Desulfurization wastewater has high salt content, complex composition, corrosiveness, and strong pollution. It must be treated separately before it can be discharged, otherwise it will cause great pollution to the environment.

Method used

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  • A desulfurization wastewater bypass flue evaporation treatment process and system
  • A desulfurization wastewater bypass flue evaporation treatment process and system
  • A desulfurization wastewater bypass flue evaporation treatment process and system

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Embodiment Construction

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0044] In order to make the drawing concise, the parts related to the present invention are only schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one". In this arti...

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Abstract

The invention discloses a desulfurization wastewater bypass flue evaporating treatment process and a system. The desulfurization wastewater bypass flue evaporating treatment process comprises the following steps: initial softening treatment: after lime is put into the desulfurization wastewater, precipitation treatment is performed to obtain a treatment solution I; Re-softening treatment: After sequentially adding sodium hydroxide and sodium carbonate along the flow direction of treatment liquid I, carry out TMF membrane treatment to obtain treatment liquid II; DTRO membrane treatment: Treat treatment liquid II through DTRO membrane to obtain treatment liquid III and discharge liquid ; Bypass flue evaporation treatment: The treatment liquid III enters the evaporation tower at the top of the evaporation tower and is atomized, and the high temperature flue gas entering the evaporation tower through the first bypass flue of the boiler flue gas enters the top of the evaporation tower and treats the liquid. III is subjected to evaporative crystallization treatment. The invention improves the treatment efficiency of desulfurization wastewater, realizes the advanced treatment of desulfurization wastewater, and effectively solves the problem of resource utilization of desulfurization wastewater in the planning and design of coal-fired power plants and in the upgrading and reconstruction of environmental protection.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater bypass flue evaporation treatment process and system. Background technique [0002] Domestic power plants mostly use the gypsum-limestone wet desulfurization process to desulfurize the flue gas, but the disadvantage of this process is that it produces waste water, and the pH value of the waste water is 5-6, and it contains a lot of salts, among which magnesium ions and calcium Ions are the most; at the same time, it also contains gypsum particles, SO2, Al and iron hydroxide; fluoride and As, Cd, Cr, Cu, Hg, Ni, Pb, Sb and other heavy metals. Since the process flue gas contains a small amount of fluoride ions, chloride ions and various impurities brought from the raw coal, it is washed down after entering the desulfurization absorption tower and enters the slurry. Dissolution has a shielding effect, which reduces the solub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/10C02F103/18
CPCC02F1/12C02F1/16C02F1/441C02F1/444C02F1/66C02F5/02C02F5/06C02F9/00C02F2101/10C02F2103/18
Inventor 马志义王勇马永兴丁洁钟雄友
Owner LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD
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