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Method and device for detecting blockage of ammonium bisulfate of air preheater

A technology of air preheater and ammonium bisulfate, which is applied in the direction of cleaning heat transfer devices, combustion methods, instruments, etc., can solve the problems of ammonium bisulfate blockage, air preheater blockage, etc., and achieve the goal of improving economy and safety Effect

Pending Publication Date: 2022-03-18
国能丰城发电有限公司 +1
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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes a detection method and device for ammonium bisulfate clogging of the air preheater, which can avoid serious clogging of the air preheater caused by ammonium bisulfate

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  • Method and device for detecting blockage of ammonium bisulfate of air preheater
  • Method and device for detecting blockage of ammonium bisulfate of air preheater
  • Method and device for detecting blockage of ammonium bisulfate of air preheater

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0048] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Description...

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Abstract

The invention discloses a method and a device for detecting ammonium bisulfate blockage of an air preheater. The method comprises the following steps: establishing an air preheater physical model based on a field air preheater structure; establishing a direct air leakage model, a comprehensive air leakage model and a thermodynamic calculation model; based on a thermodynamic calculation model, calculating thermodynamic characteristics in each branch bin of the air preheater; based on the direct air leakage model, the circumferential air leakage amount, the axial air leakage amount and the radial air leakage amount of each branch bin are calculated; based on the comprehensive air leakage model, the radial air leakage amount of each branch bin is calculated, and the thermodynamic calculation model is corrected; the corrected thermodynamic calculation model is adopted to calculate the temperature of fluid in each branch bin and the temperature of each branch bin plate of the air preheater; and judging whether ammonium bisulfate blockage exists or not based on the temperature distribution interval of the flue gas sub-bins. Ammonium bisulfate blockage of the air preheater is detected, the phenomenon that the air preheater is seriously blocked due to ammonium bisulfate is avoided, a power plant can be guided, and the economical efficiency and safety of a unit are improved.

Description

technical field [0001] The invention relates to a method and a device for detecting ammonium bisulfate clogging of an air preheater, belonging to the technical field of thermal power generation unit monitoring. Background technique [0002] The air preheater is a heat exchanger that uses the exhaust heat of boilers and other devices to preheat. Its function is to reduce the exhaust gas temperature of boilers and other equipment, improve thermal efficiency; make fuel easy to ignite, burn stably and improve combustion efficiency. [0003] After a period of operation of the air preheater of the thermal power generation unit, the nitrogen oxides at the inlet of the furnace coal sulfur powder and the denitrification reactor are very high, and the amount of ammonia gas ejected is relatively large, so the air caused by the ammonium bisulfate generated The preheater is seriously blocked, and the differential pressure of the flue gas inlet often exceeds the standard, which has a gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20F28G15/00F23L15/00G06F119/08G06F119/14
CPCG06F30/20F23L15/00F28G15/003G06F2119/14G06F2119/08Y02E20/34
Inventor 王华占阜元潘喜桂熊昌勇邹炜张晓蕾史月涛孙奉仲孙云云孙文龙
Owner 国能丰城发电有限公司
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