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System for treating desulfurization wastewater by evaporation with high-temperature flue gas

A technology for desulfurization wastewater and treatment system, which is applied in gaseous effluent wastewater treatment, water/sewage treatment, water/sludge/sewage treatment, etc. The overall structure is simple, the operation control is convenient, and the effect of improving the conductivity

Active Publication Date: 2019-06-21
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, new 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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  • System for treating desulfurization wastewater by evaporation with high-temperature flue gas
  • System for treating desulfurization wastewater by evaporation with high-temperature flue gas
  • System for treating desulfurization wastewater by evaporation with high-temperature flue gas

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Experimental program
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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 maintenance platform 2.3 and an ash hopper 2.4, and an evaporation device 10 is horizontally arranged in 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. Described waste water tank 7 links to each other wit...

Embodiment 2

[0042] Embodiment 2: substantially the same as Embodiment 1, the difference is that the level of the conveyor belt 10.4.1 at the end of the feed port 10.2 is higher than the level of the conveyor belt 10.4.1 at the end of the discharge port 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 three: substantially the same as embodiment one, the difference is 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 coal-fired power plants 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 being sent into the flue gas.

[0046] 2. During the eva...

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Abstract

The invention discloses a system for treating desulfurization wastewater by evaporation with high-temperature flue gas. The system comprises an original flue, an electrostatic precipitator, an after-dust-removal flue, an induced draft fan, a desulfurization tower and a chimney which are sequentially connected, wherein the bottom of the desulfurization tower is connected with a wastewater tank. Thesystem is characterized in that the electrostatic precipitator comprises an inlet horn, an airflow distribution plate, an outer overhaul platform and an ash hopper, an evaporation device is arrangedin the inlet horn transversely and comprises a casing with a top opening, a feed port and a discharge port are formed in two ends of the casing in the length direction of the casing respectively, a conveying device for conveying desulfurization wastewater is arranged between the feed port and the discharge port, the wastewater tank is connected with the feed port through a wastewater conveying pipeline, and a wastewater pump is arranged on the wastewater conveying pipeline. The system has the characteristics of being low in desulfurization wastewater emission, convenient in operation control,simple in structure and low in 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, desulfurization wastewater needs to be treated in a timely manner during power plant ope...

Claims

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Application Information

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Patent Type & Authority Applications(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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