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Desulfurization wastewater zero discharge system and method for preventing moisture condensation

A technology for desulfurization wastewater and zero discharge, applied in chemical instruments and methods, gaseous effluent wastewater treatment, water/sewage treatment, etc., can solve problems such as increased system resistance, increased energy consumption of induced draft fans, and sludge accumulation. Achieve the effect of avoiding the increase of system resistance, ensuring the recovery of normal operation and avoiding local blockage

Active Publication Date: 2021-10-22
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the actual operating experience shows that the system will produce about 40-60kg of sludge each time it is shut down, and its water content is about 50%, and the sludge generated by multiple shutdowns will gradually accumulate
The adhesion of sludge inside the equipment will increase the system resistance, resulting in increased energy consumption of the induced draft fan. In severe cases, the sludge will cause blockage in local narrow places, resulting in the failure of the system to operate normally

Method used

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  • Desulfurization wastewater zero discharge system and method for preventing moisture condensation

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Experimental program
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Embodiment 1

[0052] like figure 1 As shown, the desulfurization wastewater zero discharge system for preventing water vapor condensation provided in this embodiment includes a wastewater evaporation system, a main flue gas system, and an air delivery system. The flue gas inlet and flue gas outlet of the wastewater evaporation system pass through the bypass inlet respectively. The flue 6 and the bypass outlet flue 23 communicate with the main flue 18 of the main flue gas system, the waste water inlet of the waste water evaporation system communicates with the waste water pipe 4, and the air delivery system includes an air pipe 11, a control center 14 and at least one thermocouple , the outlet end of the air pipe 11 communicates with the bypass inlet flue 6, at least one thermocouple is arranged on the waste water evaporation system, on the bypass inlet flue 6, the bypass outlet flue 23, the air pipe 11 and the waste water pipe 4 There are bypass inlet flue electric valve 7, bypass outlet fl...

Embodiment 2

[0073] The zero-discharge method for desulfurization wastewater in this embodiment is carried out using the zero-discharge system for desulfurization wastewater in Example 1; specifically, in combination with figure 1 , in the desulfurization wastewater zero discharge system, the cross-sectional shape of the bypass inlet flue 6 and the bypass outlet flue 23 are both square, and the side length is 1.6-1.8m; the cross-sectional shape of the air pipe 11 is square, and its The side length is 1.6-1.8m; the cross-sectional shape of the air duct 11 can also be circular, and its diameter is 1.6-1.8m; the diameter of the upper cylinder of the evaporation tower 1 is 8.0-9.0m, and the height is 15.0-17.0m ; The diameter of the lower cone of the evaporation tower 1 is equal to the cylinder at the top of the evaporation tower 1, and the height is 7.0-9.0m.

[0074] The zero discharge method of desulfurization wastewater in this embodiment, the operation steps of zero discharge of desulfuri...

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Abstract

The invention provides a desulfurization wastewater zero discharge system and method for preventing moisture condensation. The system comprises a wastewater evaporation system, a main flue gas system and an air conveying system, a flue gas inlet and a flue gas outlet of the wastewater evaporation system are communicated with a main flue of the main flue gas system through a bypass inlet flue and a bypass outlet flue respectively, the air conveying system comprises an air pipeline, a control center and at least one thermocouple, the outlet end of the air pipeline is communicated with the bypass inlet flue, the at least one thermocouple is arranged on the wastewater evaporation system, each flue and each pipeline are respectively provided with an electric valve, and a control center controls the opening degree of the electric valve on the air pipeline according to a temperature signal monitored by the at least one thermocouple so as to adjust the air flow. According to the system and the method, moisture in the high-temperature flue gas can be prevented from dewing and generating sludge, and the problems of system resistance increase, local blockage and the like caused by sludge accumulation are avoided.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater zero discharge system and method for preventing moisture condensation. Background technique [0002] Desulfurization wastewater is the terminal wastewater generated during the cascade utilization of water resources in thermal power plants. Its salt content is as high as 3-7%, and the content of suspended solids is as high as 3-8%. The water quality is extremely complex, and direct discharge will cause serious pollution to the environment. In recent years, with the country's increasingly strict discharge control of industrial wastewater, the zero discharge of desulfurization wastewater from thermal power plants has become a hot spot in the industry. [0003] At present, the wastewater rotary atomization evaporation technology is one of the mainstream zero-discharge technologies for desulfurization wastewater in the industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/12C02F1/16C02F103/18
CPCC02F1/12C02F1/16C02F1/008C02F2103/18C02F2209/02
Inventor 李飞白玉勇谷小兵陈海杰刘海洋魏新佟园园杨瀚申高阳荆亚超彭思伟麻晓越杨言于志成崔焕民李本锋刘忠郭永红
Owner DATANG ENVIRONMENT IND GRP