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Desulfurization gypsum rain separation collection system and rotating surfing chimney containing the system

A collection system and desulfurization gypsum technology, applied in the field of thermal power plants, can solve the problems of high technology investment, the inability of flue gas to be effectively lifted and diffused, and the inability to effectively solve desulfurization gypsum rain.

Active Publication Date: 2017-11-07
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this solution does not use the GGH device, although it can effectively avoid the blockage of the GGH and is conducive to the safe and stable operation of the power plant, but because the exhaust gas temperature of the "wet chimney" is relatively low, the clean flue gas with saturated water at the outlet of the absorption tower will During the process, part of the condensation forms liquid droplets, and the flue gas cannot be effectively lifted and diffused into the atmosphere after being discharged from the chimney mouth, so the phenomenon of desulfurization gypsum rain cannot be effectively solved
4) Adopt the technology of integrating smoke towers, which has limitations in national environmental protection policies
5) Optimizing the desulfurization system, but this method has limited effects and cannot fundamentally solve the phenomenon of desulfurization gypsum rain
6) Reduce the flue gas flow rate in the chimney. This method has a large initial investment and has no reference significance for old power plants. There is no effective matching method for collecting gypsum rain droplets, and it cannot effectively solve the desulfurization gypsum rain phenomenon.
[0004] In summary, the existing methods for solving the desulfurization gypsum rain phenomenon in this field all have a series of shortcomings such as high technical investment, low relative yield, and difficulty in popularization. In order to effectively solve this problem, it is urgent to develop a method that can A new method that can effectively solve the phenomenon of desulfurization gypsum rain formed by chimney emissions, which can obtain higher income at a lower cost, and is applicable to both new power plant design and old power plant transformation

Method used

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  • Desulfurization gypsum rain separation collection system and rotating surfing chimney containing the system
  • Desulfurization gypsum rain separation collection system and rotating surfing chimney containing the system
  • Desulfurization gypsum rain separation collection system and rotating surfing chimney containing the system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Example 1 Using guide vanes as guide device + gypsum rain collection system

[0117] figure 1 It is a schematic diagram of the structure of the present invention using guide vanes as the guide device. In order to realize the rotating upward flow of the flue gas, guide vanes can be installed at the bottom of the chimney. The flue gas flows through the guide vanes to generate a certain tangential horizontal velocity, and the flue gas begins to flow in a rotating upward manner, thus realizing the Inertial separation of particles.

[0118] In this embodiment, the number of the guide vane group is 1, and the number of guide vanes in the guide vane group is 4, and the guide vanes are arranged at a height of about 10 m relative to the horizontal flue, and each The blade length of the guide vanes is 0.5 times the inner radius of the chimney inner cylinder, and the included angle between each guide vane and the horizontal plane is about 50°.

[0119] image 3 It is a structu...

Embodiment 2

[0124] Example 2 Using deflectors as deflectors + gypsum rain collection system

[0125] figure 2 It is a structural schematic diagram of using a deflector as a deflector in the present invention. The flue gas flows to the entrance of the chimney and changes direction through the deflector. After the flue gas enters the inner tube of the chimney, the flue gas rotates and flows upward at a certain speed and angle. During the flow of the flue gas, the inertial separation of liquid particles is realized. .

[0126] In this embodiment, the number of the deflectors is 2, the height of the deflectors is the same as the height of the horizontal flue, and the width of the deflectors is 0.5 times the width of the horizontal flue, so The included angle between the deflector plate and the flow direction of the flue gas in the horizontal flue is 15°.

[0127] image 3 It is a structural schematic diagram of the stagnation zone flow channel of the present invention. The flow channel ...

Embodiment 3

[0132] Embodiment 3 The combination of guide vanes and guide plates is used as the guide device + gypsum rain collection system

[0133] The guide vanes, guide plates and stagnation zone flow channels described in Embodiment 3 are the same as those described in Embodiment 1 and Embodiment 2.

[0134] result

[0135] When the combination of the guide vane and the guide plate is used as the guide device and the flow channel in the stagnation area is used as the gypsum rain collection system, the collection rate of gypsum rain ≥ 90% can be realized.

[0136] Before and after adopting said system, detect the content of gypsum rain (such as calcium sulfate) in flue gas of chimney inner tube outlet respectively, know that adopt said system can reduce the content of gypsum rain in chimney inner tube outlet flue gas Reduced by at least 98%. In addition, further testing shows that the system described in this embodiment has basically no effect on the flow rate of the flue gas in the ...

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Abstract

The invention relates to a desulfurization gypsum rain separation and collection system and a rotating surfing chimney comprising the system. Specifically, the system includes a chimney system, a gypsum rain separation system and a gypsum rain collection system. The chimney system includes a chimney inner cylinder, a chimney outer cylinder, and a horizontal flue; the gypsum rain separation system includes The first guide device in the inner cylinder and / or the second guide device arranged in the horizontal flue; the gypsum rain collection system includes a stagnation zone flow channel, an outlet pipe, and a gypsum rain recovery pipe; and the The stagnation zone flow channel is arranged on the inner wall of the inner cylinder of the chimney. By using the desulfurization gypsum rain separation and collection system of the present invention, higher income can be obtained at a lower cost, and it is applicable to the design of new power plants and the transformation of old power plants, and can effectively solve the phenomenon of desulfurization gypsum rain formed by chimney discharge.

Description

technical field [0001] The invention relates to the field of thermal power plants, in particular to a chimney desulfurization gypsum rain separation system. Background technique [0002] At present, during the operation of thermal power plants, since the liquid particles in the flue gas cannot be effectively lifted and diffused into the atmosphere, it is easy to form "desulphurized gypsum rain" or acid rain in the power plant and its surroundings, polluting the power plant and its surrounding environment. [0003] In the prior art, the methods for preventing and controlling desulfurization gypsum rain mainly include the following: 1) using a gas-gas heat exchanger (gasgasheater, GGH) device, using the flue gas in front of the desulfurization tower to heat the flue gas behind the desulfurization tower, and the heated net The temperature of the flue gas is high, and the flue gas can be effectively lifted after being discharged from the chimney, thereby preventing the occurrenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J15/04F23J11/00F23J13/00
Inventor 杜龙干梦军申松林黎大胜邓文祥
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST