Membrane treatment method for desulfurization wastewater of coal-fired power plant

A desulfurization wastewater and membrane treatment technology, applied in gaseous effluent wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of high cost of chemicals, inability to make full use of, and increase in treatment costs, and reduce energy consumption. , huge economic and social benefits, the effect of reducing the amount of wastewater

Inactive Publication Date: 2019-03-15
李卓坪
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

This invention allows for full automation with ease while minimizing wastage water by automatically treating it before being treated further without requiring excessive power or equipment costs.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at treating coal- fired power plant exhaust containing sulfuric acid compounds during regenerative processes that involve burning fuel with air under pressure. Existing methods require expensive equipment due to their complexity and potential harmful effects on human health caused by excessive amounts of nitrogen oxide emissions.

Method used

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  • Membrane treatment method for desulfurization wastewater of coal-fired power plant
  • Membrane treatment method for desulfurization wastewater of coal-fired power plant

Examples

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example 1

[0023] Example 1 according to figure 1 The process flow chart in the middle is to carry out the membrane treatment of desulfurization wastewater concentration and reduction. The specific steps are as follows:

[0024] 1) After the desulfurization wastewater is pretreated in the clarifier, it is passed through the circulating ultrafiltration for filtration, and the recovery rate of the circulating ultrafiltration is 100%;

[0025] 2) After step 1), the circulating ultrafiltration product water is concentrated through the vibrating membrane, the recovery rate is 65%, 65% of the product water is obtained for reuse, and 35% of the concentrated water is obtained and enters the slag spraying system.

[0026] The recovery rate of desulfurization wastewater in this example is 65%.

[0027] The water quality indicators before and after desalination wastewater treatment in the example are shown in Table 1

[0028] Table 1. Comparison table of water quality indicators before and after mem

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Abstract

The invention belongs to the technical field of desulfurization wastewater treatment, and in particular designs a circulating ultrafiltration membrane and vibration membrane treatment method and system. The membrane treatment method for desulfurization wastewater of the coal-fired power plant comprises the following steps: 1) pretreatment is carried out on desulfurization wastewater by a clarification tank; 2) circulating ultrafiltration is carried out on pretreatment produced water to obtain ultrafiltered produced water; 3) vibration membrane filtering is carried out on ultrafiltered producedwater to obtain vibrating membrane concentrated water and vibrating membrane produced water; (4) vibrating membrane concentrated water is concentrated water of the system, and then enters a subsequent zero-emission system; 5) vibrating membrane produced water is reused for production. The water quality of produced water disclosed by the invention meets water-quality requirements for reuse water of a desulfurization tower in the power plant, the water quantity of concentrated water is only 35% of the original water quantity, and both concentrated water and produced water can be used for bottomslag spraying of a boiler to realize zero discharge of wastewater.

Description

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Claims

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Application Information

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Owner 李卓坪
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