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W flame boiler furnace arranging air nozzle on side wall

An air nozzle and boiler furnace technology, which is applied in the directions of combustion air/fuel supply, combustion equipment, solid fuel combustion, etc., can solve the problems affecting the combustion efficiency and safe operation of the boiler, the side walls are prone to serious coking, and the late oxygen supply conditions are poor. It can prevent serious coking and high temperature corrosion, reduce the workload of furnace maintenance and ensure safe operation.

Active Publication Date: 2008-10-08
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

such as NO X High emissions, poor oxygen supply conditions in the later stage, side walls are prone to severe coking and high temperature corrosion, etc.
Some boilers are severely coked, which has affected the combustion efficiency and safe operation of the boiler

Method used

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  • W flame boiler furnace arranging air nozzle on side wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Take the 600MW subcritical "W" flame boiler furnace as an example: the front and rear walls 1, 3 of the furnace (including the front, rear upper and lower walls 1~1, 3~1, 1~3, 3~3 and front, The rear furnace arches 1-2, 3-2) are the same as the background technology, that is, the width is 34.5m, the upper furnace is 2 to 1 deep (the width of the water wall in the upper furnace) is 9.9m, and the lower furnace is 2 to 2 deep (ie Inner cavity water wall width) 16.0m; the number of burners 10 (18 in each) and their arrangement on the front and rear furnace arches 1-2 and 3-2, as well as the furnace (around) insulation layer 8, the furnace (inside Around the cavity) the water wall 9, the wind box 6-1, 6-2, the air intake regulating plate 7, and the cold ash hopper 4. The structure and arrangement are also the same as the background technology; this embodiment is opposite to its center on both sides of the wall Arrange 3 rows of air nozzles 5 in line symmetry, among which: the fi...

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PUM

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Abstract

The invention pertain to 'W' flame combustion boiler combustion chamber equipped with air nozzles on combustion chamber side, comprising a combustion chamber body having front, rear walls containing a belt crown of oven and a double-side wall equipped with air nozzles, and upper, lower combustion chambers equipped on the body, a combustion chamber hopper, a combustor group equipped on the crown of oven, an air inlet adjusting plate and a wind box group. According to the invention, a nozzle group capable of supplying axial flow air and side stream air into the combustion chamber is equipped onthe double-side wall, thereby reducing the concentration of CO by 50-500ppm, temperature by 100-400 DEG C, increasing boiler thermal efficiency by 0.1-0.5%, reducing discharge amount of NOX by 50-200mg. Thus severe coking and high-temperature corrosion on side wall water screen can be effectively prevented, safety operation can be secured and examination and repair amount of work of combustion chamber can be reduced, the service-life can be prolonged. The invention overcomes disadvantages of easy severe coking and high-temperature corrosion of the side wall in background art.

Description

Technical field [0001] The invention belongs to a large-scale power station boiler furnace, in particular to a "W" flame boiler furnace provided with air nozzles on the side wall. Background technique [0002] With the increasing demand for electricity at home and abroad, power station boilers are developing towards large capacity and high parameters. However, due to the limitation of coal resources and the requirements for pollution emissions, it is determined that the coal used in power station boilers will be low volatile and low heat. The value of low-quality coal is mainly. The "W" flame combustion technology basically solves the stability and reliability problems of large-scale power station boilers burning low volatile coal. The furnace of this type of boiler includes front and rear walls with furnace arches, and both sides of the wall are located at the front and The burner group on the rear furnace arch, the wind box group located between the front and rear wall insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B60/00F23L1/00
Inventor 刘泰生王军陈灿马晓伟李赵平
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP