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Adjustment Method for Wall Temperature of Counter-fired Boiler after Stopping Grinding under Low Load

A technology of hedging combustion and adjustment method, which is applied in the direction of combustion method, combustion chamber, and controlled combustion, which can solve the problems of wall temperature rise and other problems, and achieve the effects of no over-temperature avoidance, fast adjustment speed, and prevention of over-temperature problems

Active Publication Date: 2022-04-19
SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a method for adjusting the wall temperature of the counter-fired boiler after the low-load shutdown, which can solve the problem of rapid and large rise in the wall temperature of the counter-fired boiler after the low-load shutdown, and prevent the boiler tube wall from overheating

Method used

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  • Adjustment Method for Wall Temperature of Counter-fired Boiler after Stopping Grinding under Low Load
  • Adjustment Method for Wall Temperature of Counter-fired Boiler after Stopping Grinding under Low Load
  • Adjustment Method for Wall Temperature of Counter-fired Boiler after Stopping Grinding under Low Load

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Embodiment

[0031] Unit 3 of a certain power plant is a 1050MW coal-fired turbogenerator set. The combustion equipment is a swirl pulverized coal burner that adopts the opposite combustion method of the front and rear walls. There are a total of 6 layers of swirl pulverized coal burners, and the front and rear walls are respectively arranged with 3 layers. There are 8 swirling pulverized coal burners on the front and rear walls of each floor, and each pulverizing system provides air powder mixture for the 8 pulverized coal burners on the corresponding floor. One layer of exhaust air is arranged above the swirl pulverized coal burners on the front and rear walls; the combustion equipment on the front (rear) wall is arranged as follows figure 2 shown.

[0032] When the 600MW load is operated with the lower four-layer mill (ABDE), the wall temperature distribution is good, and the outlet wall temperature of the upper water-cooled wall on the front wall is stable at about 430°C, but after th...

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Abstract

The invention discloses a method for adjusting the wall temperature of a counter-combustion boiler after stopping grinding under low load. adjustment; the adjustment method includes adjusting the opening of the outage grinding cooling primary air, adjusting the overburning air opening, and adjusting the coal feeding amount of the coal mill on the opposite side of the outage coal mill; the adjustment process is as follows: The opening degree of the primary air for grinding and cooling is large; the opening degree of the burnout air is adjusted differently; the coal supply of the coal mill on the opposite side of the outage coal mill is gradually reduced.

Description

technical field [0001] The invention relates to the technical field of boiler commissioning, in particular to a method for adjusting the wall temperature of a counter-combustion boiler after grinding is stopped under low load. Background technique [0002] With the advancement of the domestic deep peak shaving policy, the running time of thermal power units under low load continues to increase. Domestic counter-firing boilers occupy the vast majority of 600MW and 1000MW units. Under low load, the number of coal mills is changed from 4 to 3 mills, and the operation mode of coal mills is changed from symmetric to asymmetric. In the end, the deviation of combustion heat load may be increased, causing the wall temperature to rise rapidly, and even overheating problems. [0003] At present, there are many researches on the adjustment of wall temperature deviation of opposed combustion boilers at home and abroad, most of which focus on the influence of burners, exhaust air rods, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N5/00F23N1/02F23K1/00F23M5/08
CPCF23N5/00F23N1/02F23K1/00F23M5/08
Inventor 赵鹏王小华陈宝康陈敏梅振锋薛晓垒彭小敏俞胜捷刘瑞鹏丁奕文朱晋永姚胜王祝成梁昊王晖
Owner SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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