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Tail flue gas temperature adjusting system, thermal power plant boiler and method

A technology of flue gas temperature and tail flue, which is applied in the direction of combustion methods, combustion chambers, baffles, etc., can solve the problems of excessive emissions and the inability to invest in the denitrification system, and achieve high social and economic benefits

Pending Publication Date: 2020-03-27
SHANDONG ZHONGSHI YITONG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a tail flue flue gas temperature adjustment system, a thermal power plant boiler and a method, which can adjust the tail flue gas temperature, and effectively solve the problem that the denitrification system cannot be put into operation due to the low flue gas temperature. problem, so that the boiler does not have to worry about NO at low load X Emissions exceed the standard, with high social and economic benefits

Method used

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  • Tail flue gas temperature adjusting system, thermal power plant boiler and method

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Experimental program
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Effect test

Embodiment 1

[0030] like figure 1 As shown, a tail flue flue gas temperature regulating system of the present embodiment includes:

[0031] The first flue 1, the first flue includes the first section flue 1-1, the second section flue 1-2 and the third section flue 1-3 connected in series; the first section The input end of the flue 1-1 is connected to the furnace outlet 2; the output end of the third section flue 1-3 is connected to the denitrification device 3; the first section flue 1-1 and the third section flue 1- 3 is also directly communicated with the second flue 4; the output end of the third segment flue 1-3 is also provided with a temperature sensor, and the temperature sensor is connected to the microprocessor; the second flue is provided with The flue gas baffle, the flue gas baffle is connected to the microprocessor through the driving mechanism, and the microprocessor is used for: receiving the output flue gas temperature of the third section of the flue uploaded by the temp...

specific Embodiment approach

[0042] As a specific implementation manner, one end of the second flue is connected to the input end of the first section of the flue, and the other end of the second flue is connected to the output end of the third section of the flue.

[0043] The flue gas furnace outlet flows through the first section of the flue, the second section of the flue and the third section of the flue along the original flue of the boiler, and the temperature of the flue gas decreases step by step, reaching the denitrification device and then flowing to the rear equipment . The invention adopts the second flue to lead the high-temperature flue gas to the inlet of the denitrification device and mix it with the lower temperature flue gas output from the output end of the first flue to achieve the purpose of increasing the temperature of the flue gas at the inlet of the denitrification device; the second flue is arranged with a flue gas barrier When the boiler load is high, the flue gas baffle is clo...

Embodiment 2

[0050] This embodiment provides a thermal power plant boiler, which includes such as figure 1 The tail flue flue gas temperature regulation system shown.

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Abstract

The invention provides a tail flue gas temperature adjusting system, a thermal power plant boiler and a method. The tail flue gas temperature adjusting system comprises a first flue, and the first flue comprises a first-section sub flue, a second-section sub flue and a third-section sub flue communicating in a series-connection mode; the input end of the first-section sub flue is connected with ahearth outlet; the output end of the third-section sub flue is connected with a denitration device; a second flue further directly communicates with the position between the first-section sub flue andthe third-section sub flue; the output end of the third-section sub flue is further provided with a temperature sensor, and the temperature sensor is connected with a microprocessor; and a gas baffleis further arranged in the second flue and connected with the microprocessor through a driving mechanism, and the microprocessor is used for controlling the driving mechanism to adjust the opening degree of the gas baffle. According to the tail flue gas temperature adjusting system, the thermal power plant boiler and the method, the tail flue gas temperature can be adjusted, and the problem thatthe gas temperature is low, and consequently a denitration system cannot be put into operation is effectively solved.

Description

technical field [0001] The invention belongs to the field of thermal power generation, and in particular relates to a tail flue flue gas temperature regulating system, a thermal power plant boiler and a method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The inventors found that when the existing thermal power plant boilers are under low load, the temperature of the tail flue gas is low, and the temperature of the tail flue gas cannot be adjusted, and thus cannot meet the conditions for the denitrification system to be put into operation, so that the nitrogen oxides NO X The emission exceeds the standard, which greatly limits the efficiency of the unit. Contents of the invention [0004] In order to solve the above problems, the present invention provides a tail flue gas temperature adjustment system, a thermal power plant boiler an...

Claims

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Application Information

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IPC IPC(8): F23J15/02F23M9/00
CPCF23J15/022F23M9/003
Inventor 崔辉车刚刘希健杨锋
Owner SHANDONG ZHONGSHI YITONG GRP