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High temperature flue gas evaporative desulfurization wastewater treatment system

A technology for desulfurization wastewater and treatment system, which is applied in gaseous discharge wastewater treatment, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex operation control, new land occupation, and high system energy consumption. Achieve the effect of simple overall structure, convenient operation and control, and low system energy consumption

Active Publication Date: 2021-06-29
WUHAN LONGKING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has complex configuration, large investment, complex operation control, high energy consumption of the system, additional land occupation, and the extraction of high-temperature flue gas from the front of the boiler air preheater will directly affect the efficiency of the boiler.

Method used

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  • High temperature flue gas evaporative desulfurization wastewater treatment system
  • High temperature flue gas evaporative desulfurization wastewater treatment system
  • High temperature flue gas evaporative desulfurization wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: if Figure 1-4 The shown a kind of high-temperature flue gas evaporative desulfurization wastewater treatment system comprises the original flue 1 connected in sequence, the electrostatic precipitator 2, the flue 3 after dust removal, the induced draft fan 4, the desulfurization tower 5 and the chimney 6, and the desulfurization tower 5 The bottom is connected with waste water tank 7. Wherein, the electrostatic precipitator 2 includes an inlet horn 2.1, an airflow distribution plate 2.2, an external inspection platform 2.3 and an ash hopper 2.4, and an evaporation device 10 is arranged horizontally inside the inlet horn 2.1.

[0028] The evaporating device 10 comprises a shell 10.1 with an open top. The two ends of the shell 10.1 along its length direction are respectively provided with a feed port 10.2 and a discharge port 10.3. There is a conveying device 10.4 for conveying desulfurization wastewater. The waste water tank 7 is connected to the feed i...

Embodiment 2

[0042] Embodiment 2: It is generally the same as Embodiment 1, except that the level of the conveyor belt 10.4.1 at the end of the feed inlet 10.2 is higher than that of the conveyor belt 10.4.1 at the end of the discharge outlet 10.3. After the desulfurization wastewater enters the upper surface of the conveyor belt 10.4.1, it can automatically slide down from the end of the conveyor belt 10.4.1 located at the feed port 10.2 to the end of the conveyor belt 10.4.1 located at the discharge port 10.3 under the action of gravity, thereby reducing Conveyor belt 10.4.1 is located at the leakage of feeding port 10.2 one end.

Embodiment 3

[0043] Embodiment 3: It is generally the same as Embodiment 1, except that the level of the middle part of the conveyor belt 10.4.1 is lower than the level of both ends. After the desulfurization wastewater is on the upper surface of the conveyor belt 10.4.1, it moves to the middle of the conveyor belt 10.4.1 and then deposits in the depression, so as to increase the contact time with the high-temperature flue gas and evaporate more fully.

[0044] Compared with the prior art, the present invention has the advantages of:

[0045] 1. The flue gas temperature at the inlet of the electrostatic precipitator in a coal-fired power plant is generally 120-160°C, which is significantly higher than the boiling point of water under normal conditions. Moreover, compared with the flue gas volume of the unit, the amount of waste water produced by desulfurization is small, and the water can be completely evaporated after it is sent into the flue gas.

[0046] 2. During the evaporation proce...

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Abstract

The invention discloses a high-temperature flue gas evaporative desulfurization wastewater treatment system, which comprises an original flue, an electric precipitator, a dust-removed flue, an induced draft fan, a desulfurization tower and a chimney connected in sequence, and a waste water tank is connected at the bottom of the desulfurization tower. It is characterized in that: the electrostatic precipitator includes an inlet horn, an air distribution plate, an external inspection platform and an ash hopper, and an evaporation device is arranged horizontally inside the inlet horn, and the evaporation device includes a shell with an open top, and the shell Both ends along its length direction are respectively provided with a material inlet and a material outlet, and a conveying device for transporting desulfurization wastewater is provided between the material inlet and the material outlet, and the waste water tank and the material inlet are transported through waste water The pipes are connected, and the waste water delivery pipe is provided with a waste water pump. The invention has the characteristics of less discharge of desulfurization wastewater, convenient operation control, simple structure and low system energy consumption.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a high-temperature flue gas evaporative desulfurization wastewater treatment system. Background technique [0002] The flue gas desulfurization process of domestic coal-fired power plants generally adopts the wet desulfurization process, especially the limestone-gypsum method, which has the advantages of mature technology, stable operation, and high desulfurization efficiency. waste water. Desulfurization wastewater is the terminal wastewater of power plants. It has complex components, high salt content, strong corrosion, and contains a large number of suspended particles, inorganic salt components, heavy metal ions and other impurities. Many of them are the first category that requires strict control in national environmental protection standards. pollutants. For this reason, the desulfurization wastewater must be treated in time for the operation of the power pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/48B03C3/02C02F1/16C02F103/18
Inventor 张会君卢徐胜付锐汤大为曾静
Owner WUHAN LONGKING ENVIRONMENTAL PROTECTION TECH
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