W flame boiler combustion optimizing device

A technology of boiler combustion and optimization device, applied in the field of boiler combustion, can solve the problems of large thermal deviation of W-flame boilers, over-temperature heating load of water-cooling wall, uneven heating load, etc., so as to reduce combustion fluctuation and thermal deviation, reduce harm and impact small effect

Active Publication Date: 2012-10-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of large thermal deviation, overheating of the water wall and uneven heating load in the W flame boiler equipped with the existing boiler combustion device, and further propose a W flame boiler combustion optimization device

Method used

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  • W flame boiler combustion optimizing device
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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, a W-flame boiler combustion optimization device in this embodiment includes a W-flame boiler with M burner groups and Y coal mills 2, each burner group includes three burners 1, each Multiple primary air nozzles 1-1 and multiple secondary air nozzles 1-2 are arranged on each burner 1, M burner groups are evenly arranged on the furnace arch, and each coal pulverizer 2 is provided with six supply outlets. At the pulverized coal outlet, the air inlet of each burner group is provided with a secondary wind box 5, and each secondary wind box 5 is provided with a wind box baffle 3, and the bellows baffle 3 is used to control the air volume, and the device also includes multiple A wind chamber 6 and a plurality of wind chamber baffles 4 consistent with the number of wind chambers, an air chamber 6 connected to the two is arranged between each burner 1 and the secondary air wind box 5, an...

specific Embodiment approach 2

[0014] Specific implementation mode two: combination figure 1 Describe this embodiment, the quantity of the burner group of this embodiment is three, the quantity of the primary air nozzle 1-1 on each burner 1 is four, the secondary air nozzle 1-1 on each burner 1 The number of 2 is four, four primary air nozzles are arranged in 1-1 array, four secondary air nozzles are arranged in 1-2 array, four primary air nozzles 1-1 and four secondary air nozzles 1-2 are parallel to each other It is arranged on each burner 1, and the three burners 1 of each burner group are respectively supplied with pulverized coal by different coal mills 2. In this embodiment, for W flame boilers with primary and secondary air arranged at intervals, this embodiment takes the arrangement of burners in a part of the area on the arch of W flame boilers as an example for illustration, combining figure 1 Note that the number of burner groups in this area is three groups, and the number of corresponding coal...

specific Embodiment approach 3

[0015] Specific implementation mode three: combination figure 2 Describe this embodiment, the quantity of the burner group of this embodiment is three, the quantity of the primary tuyere 1-1 on each burner 1 is six, the secondary tuyere 1-1 on each burner 1 The number of 2 is three, and there is a row of secondary air nozzles 1-2 between the primary air nozzles 1-1 arranged in two rows, and the number of primary air nozzles 1-1 in each row is three, and each burner group Each of the three burners 1 is fed by different coal mills 2. This embodiment is aimed at the W-flame boiler that adopts multi-injection staged combustion, combining figure 2Note, taking the arrangement of burners in the local area on the W flame boiler arch as an example, the three burners 1 of each burner group are supplied with powder by different coal mills, and each burner is provided with two rows of primary air nozzles 1 -1 and one row of secondary air nozzles 1-2 located in two rows of primary air ...

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Abstract

The invention relates to a W flame boiler combustion device relating to a boiler combustion device, belonging to the technical field of boiler combustion and aiming at solving the problems of large thermal deviation, water cooled wall overtemperature and nonuniform thermal load of a W flame boiler equipped with the traditional boiler combustion device. The W flame boiler combustion optimizing device comprises the W flame boiler, Y coal mills, a plurality of air chamber and a plurality of air chamber baffle plates, wherein the W flame boiler is provided with M combustor groups; each combustor is provided with a plurality of primary air nozzles and a plurality of secondary air nozzles; the M combustor groups are uniformly distributed on a furnace arch; an air inlet of each combustor group is provided with a secondary air bellow, and each secondary air bellow is internally provided with an air bellow baffle plate; the number of the plurality of air chamber baffle plates is consistent to that of the air chamber, and the air chambers baffle plates are arranged on the air chambers; and three combustors of each combustor group are respectively supplied with coal dust by different coal mills. The invention is suitable for optimizing the combustion of the W flame boiler.

Description

technical field [0001] The invention relates to a boiler combustion optimization device, which belongs to the technical field of boiler combustion. Background technique [0002] Under normal circumstances, the load variation range of coal-fired boilers is 70%-100% of the rated evaporation capacity. In actual operation, it is necessary to adjust the load according to reasons such as changes in power consumption. Below this range is low-load operation. [0003] When the load of the boiler is reduced, the method adopted is to stop operating one or several coal mills to reduce the powder supply, thereby reducing the evaporation to reduce the load of the boiler. At present, the biggest problem encountered in the low-load operation of supercritical boilers is the large thermal deviation between the water-cooled wall tube walls and the over-temperature phenomenon. The low-load operation and outage of the burner will cause excessive fluctuations in thermal load at the water-cooled ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/00F23K3/02F23L9/00
Inventor 李争起况敏张翔刘春龙陈夏超
Owner HARBIN INST OF TECH
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