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Ultrasonic atomization treatment process of electric power plant desulfurization wastewater

A desulfurization wastewater, ultrasonic atomization technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve environmental pollution and other problems, achieve high reaction efficiency and simple process flow , the effect of small footprint

Inactive Publication Date: 2015-08-12
WUXI RUNYUAN ENVIRONMENTAL PROTECTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, direct discharge will cause serious pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the present invention, the desulfurization wastewater is transported to the pH value adjustment tank; one or more of lime, limestone, caustic soda or sodium carbonate is added in the pH value adjustment tank, and the pH value is 8, so as to generate part of the heavy metal hydroxide and flow into the pH value adjustment tank. Reaction tank; add organic sulfide to produce mercury sulfide and copper sulfide precipitation, and then flow into the flocculation tank by gravity; add iron salt, polymer flocculant, coagulant aid to condense suspended particles and part of COD dispersed in wastewater into concentrated flocculation body; the clear water of the flocculation sedimentation tank overflows from the upper part to the final oxidation neutralization box, and the oxidant and neutralizer are added by ultrasonic atomization, and the COD in the water is fully oxidized under the atomization state, and is detected by an online monitor; Heavy metals are deposited at the bottom...

Embodiment 2

[0028] In the present invention, the desulfurization wastewater is transported to the pH value adjustment tank; one or more of lime, limestone, caustic soda or sodium carbonate is added in the pH value adjustment tank, and the pH value is 9, so as to generate part of the heavy metal hydroxide and flow into the pH value adjustment tank Reaction tank; add organic sulfide to produce mercury sulfide and copper sulfide precipitation, and then flow into the flocculation tank by gravity; add iron salt, polymer flocculant, coagulant aid to condense suspended particles and part of COD dispersed in wastewater into concentrated flocculation body; the clear water of the flocculation sedimentation tank overflows from the upper part to the final oxidation neutralization box, and the oxidant and neutralizer are added by ultrasonic atomization, and the COD in the water is fully oxidized under the atomization state, and is detected by an online monitor; Heavy metals are deposited at the bottom,...

Embodiment 3

[0030] In the present invention, the desulfurization wastewater is transported to the pH value adjustment pool; one or more of lime, limestone, caustic soda or sodium carbonate is added in the pH value adjustment pool, and the pH value is 10, so as to generate part of the heavy metal hydroxide and flow into the pH value adjustment pool Reaction tank; add organic sulfide to produce mercury sulfide and copper sulfide precipitation, and then flow into the flocculation tank by gravity; add iron salt, polymer flocculant, coagulant aid to condense suspended particles and part of COD dispersed in wastewater into concentrated flocculation body; the clear water of the flocculation sedimentation tank overflows from the upper part to the final oxidation neutralization box, and the oxidant and neutralizer are added by ultrasonic atomization, and the COD in the water is fully oxidized under the atomization state, and is detected by an online monitor; Heavy metals are deposited at the bottom...

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PUM

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Abstract

The present invention relates to an ultrasonic atomization treatment process of electric power plant desulfurization wastewater. According to the process, desulfurization wastewater is conveyed into a pH value adjusting pool; one or a plurality of materials selected from lime, limestone, sodium hydroxide and sodium carbonate are added to the pH value adjusting pool so as to produce partial heavy metal hydroxides and self-flow into a reaction pool; an organic sulfide is added to produce precipitates such as mercury sulfide and copper sulfide, and the precipitates self-flow into a flocculation pool; an iron salt, a polymer flocculant, and a coagulant are added to condense suspended solid particles dispersed in the wastewater and partial COD into the centralized floc; the clear water of the flocculation precipitation pool overflows into a final oxidation neutralization box from the upper portion, an oxidizing agent and a neutralizing agent are poured by using an ultrasonic atomization manner, and the COD in the water is completely oxidized in an atomizing state; and the sludge is subjected to dewatering utilization, and the sewage discharge meets the standard. According to the present invention, the process is simple, and the contaminant removal effect is good.

Description

technical field [0001] The invention relates to a desulfurization wastewater treatment process, in particular to a power plant desulfurization wastewater ultrasonic atomization treatment process. Background technique [0002] my country's current energy structure is still dominated by coal, and power supply is still dominated by coal-fired electricity, resulting in more than 90% of sulfur dioxide emissions from coal combustion. With the increasingly stringent industrial policy and environmental protection requirements, desulfurization of power plants is a general trend. More than 80% of the desulfurization process adopts wet desulfurization process, resulting in a large amount of desulfurization wastewater. [0003] Pollutants in desulfurization wastewater come from desulfurization flue gas and additives in desulfurization. Various elements in coal, such as Cl, Hg, Pb, F, As, etc., undergo chemical reactions during the combustion process to generate a variety of toxic and ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 梅秀芳魏伟还建强宁平李彬周姣姣
Owner WUXI RUNYUAN ENVIRONMENTAL PROTECTION EQUIP CO LTD
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