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Evaporation device applied to wastewater desulfurization and control method

A technology of desulfurization waste water and evaporation device, which is applied in the direction of auxiliary controller with auxiliary heating device, water treatment parameter control, temperature control by electric mode, etc. It can solve the problems of corrosive and easy scaling, complex composition and high salt content , to achieve the effect of low operation and maintenance costs, small equipment volume, and improved purification quality

Active Publication Date: 2017-09-22
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the continuous circulation of desulfurization water, the soluble salts are continuously concentrated, which will produce desulfurization wastewater with complex components, high turbidity, and high salt content, which is highly corrosive and easy to scale.

Method used

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  • Evaporation device applied to wastewater desulfurization and control method
  • Evaporation device applied to wastewater desulfurization and control method
  • Evaporation device applied to wastewater desulfurization and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0026]Embodiment 1 of the present invention: an evaporation device applied to desulfurization wastewater, comprising an air preheater 1, an evaporation tower 2, a crystallization salt recovery device 3 and an electric dust collector 4, and the air preheater 1 communicates with the flue gas pipe 5 The evaporation tower 2 is connected, the evaporation tower 2 is connected with the crystallized salt recovery device 3, the crystallized salt recovery device 3 is connected with the electrostatic precipitator 4, and the evaporation tower 2 is provided with an adjusting baffle 7, a partition partition 8, a swirling blade 9 and a smoke The gas uniform distribution plate 24 is provided with small holes on the smoke gas uniform distribution plate 24, and the small opening rate on the smoke gas uniform distribution plate 24 is 40%. The adjusting baffle 7 is set at the flue entrance 10 of the evaporation tower 2, the partition partition 8 is set between the flue entrance 10 and the swirl bl...

Embodiment 2

[0027] Embodiment 2 of the present invention: an evaporation device applied to desulfurization wastewater, comprising an air preheater 1, an evaporation tower 2, a crystallization salt recovery device 3 and an electric dust collector 4, and the air preheater 1 passes through a flue gas pipe 5 and The evaporation tower 2 is connected, the evaporation tower 2 is connected with the crystallization salt recovery device 3, the crystallization salt recovery device 3 is connected with the electrostatic precipitator 4, and the evaporation tower 2 is provided with an adjusting baffle 7, a partition partition, a swirl blade 9 and a flue gas The uniform distribution plate 24 is provided with small holes on the smoke uniform distribution plate 24, and the small opening rate on the smoke gas uniform distribution plate 24 is 30%. The adjusting baffle 7 is set at the flue entrance 10 of the evaporation tower 2, the partition partition 8 is set between the flue entrance 10 and the swirl blade ...

Embodiment 3

[0034] Embodiment 3 of the present invention: a control method applied to an evaporation device for desulfurization wastewater, including detecting the temperature of the flue gas swirl area and / or the flue gas parallel flow area, and comparing the detected temperature value with the preset value of each area value, and control and adjust the opening of the baffle 7 according to the comparison result, and adjust the temperature of the dry desulfurization wastewater in the evaporation tower 2; compare the detected temperature value of the flue gas swirling area with the preset value, when When the temperature value in the flue gas swirling area is lower than the preset value in the flue gas swirling area, the opening of the flue gas regulating baffle 7 is reduced; the detected temperature value in the flue gas parallel flow area Compared with the preset value, when it is detected that the temperature in the flue gas parallel flow area is lower than the preset value in the flue g...

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Abstract

The invention discloses an evaporation device applied to wastewater desulfurization. The evaporation device comprises an air preheater, an evaporation tower, a crystalline salt recovery device and an electric precipitator, wherein the air preheater is connected with the evaporation tower through a flue gas pipe, the evaporation tower is connected with the crystalline salt recovery device, the crystalline salt recovery device is connected with the electric precipitator, an adjusting baffle, a partition plate and rotational flow blades are arranged in the evaporation tower, the adjusting baffle is arranged at a flue inlet of the evaporation tower, the partition plate is arranged between the flue inlet and the rotational flow blades, an atomization device is arranged on the evaporation tower, and the rotational flow blades are arranged above the atomization device. By adopting the evaporation device applied to wastewater desulfurization and the control method, high-quality evaporation drying can be conducted on the wastewater produced in the wet desulphurization process of a coal-fired power plant, and the purifying quality of wastewater desulfurization is improved.

Description

technical field [0001] The invention relates to an evaporation device and a control method applied to desulfurization wastewater, and belongs to the technical field of desulfurization of coal-fired thermal power plants. Background technique [0002] The limestone-gypsum wet flue gas desulfurization process is the most mainstream flue gas desulfurization technology at home and abroad. This technology belongs to the gas-liquid-solid three-phase reaction process, including SO 2 Dissolution and mass transfer process of limestone in liquid and reaction process of dissolved matter in liquid phase. The desulfurization slurry is sprayed into the desulfurization tower from the spray layer on the top of the tower through the liquid phase nozzle from top to bottom, and the flue gas passes through the absorption area from bottom to top from the bottom area of ​​the absorption tower, and the desulfurization water is continuously circulated in the absorption tower to complete the SO 2 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/12C02F1/16C02F9/02G05D23/30C02F103/18
CPCG05D23/30C02F1/048C02F1/12C02F1/16C02F2103/18C02F2209/02
Inventor 耿宣汪洋王云李苇林
Owner CHINA HUADIAN ENG
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