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Method and system unit for flue gas desulfurization and wastewater treatment

A technology for desulfurization wastewater and treatment methods, which is applied in dehydration/drying/concentrated sludge treatment, water/sewage treatment, neutralized water/sewage treatment, etc., and can solve complex evaporation treatment equipment, no root cause of pollution, high energy consumption, etc. problems, to achieve the effect of simple and convenient operation, avoiding special equipment, and economical investment

Inactive Publication Date: 2007-07-25
湖南华迪电力环保工程技术有限公司
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Problems solved by technology

[0007] The disadvantage of the above treatment methods is that only a small number of heavy metal ions are fixed in the ash, and most of the heavy metal ions can dissolve in water to continue to pollute the environment, and there is no root cause of pollution.
The use of evaporation treatment equipment is complex, energy-consuming, and costly

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  • Method and system unit for flue gas desulfurization and wastewater treatment
  • Method and system unit for flue gas desulfurization and wastewater treatment

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Embodiment Construction

[0043] The flue gas desulfurization wastewater treatment method comprises the following steps:

[0044] 1. Alkaline treatment with calcium hydroxide, the pH value is about 9.5;

[0045] 2. Add organic sulfide, the amount added is 50mg / L;

[0046] 3. Added coagulant aluminum sulfate (30mg / L), and 0.1% aqueous solution flocculant polyacrylamide (8mg / L);

[0047] 4. Carry out water clarification and sludge concentration, and separate suspended solids from wastewater;

[0048] 5. Dewater the concentrated mud.

[0049] The flue gas desulfurization wastewater treatment system device of the present invention is shown in Fig. 1 to Fig. 4. The system device is composed of a wastewater buffer tank 5, a neutralization / reaction / flocculation tank 8, a clarification / concentration tank 17, and a water outlet tank 20 connected in series through pipelines.

[0050] The wastewater buffer pool is shown in Figure 1. The desulfurization wastewater 1 first flows into the wastewater buffer pool 5...

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Abstract

This invention provides method and apparatus for treating wastewater from flue gas desulfurization. The method comprises: adjusting the water amount and quality, performing alkalization treatment, precipitating insoluble heavy metals, coagulating, clarifying water, concentrating the sludge, and dehydrating the sludge slurry. The apparatus is composed of a wastewater buffer pool, a neutralization / reaction / flocculation tank, a clarification / concentration pool, and a water outlet tank connected in series by pipelines. This invention provides a system for completely treating heavy metal pollution, and adopts normal apparatus, thus avoiding complex and specific apparatus. Besides, this invention also has such advantages as easy operation and low investment.

Description

technical field [0001] The invention belongs to wastewater treatment technology, and in particular relates to a flue gas desulfurization wastewater treatment method and a system device. Background technique [0002] Sulfur dioxide and acid rain pollution in the world today has become a major environmental problem that has attracted the attention of all countries. As an important industry that emits sulfur dioxide and causes acid rain pollution, thermal power plants will not only cause serious harm to the atmospheric environment but also restrict the development of the power system if no measures are taken. Wet flue gas desulfurization is currently the only large-scale commercial desulfurization method. In the limestone-gypsum flue gas desulfurization process, it is inevitable to produce a certain amount of waste water, which contains a class of pollutants (heavy metal ions) strictly controlled by the state. If it is discharged directly without treatment, it will pollute the...

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/66C02F1/62C02F1/52C02F11/12
Inventor 曾佑开胡胜蓝段秋勇赵红乔
Owner 湖南华迪电力环保工程技术有限公司
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