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Half-W-shaped flame burning supercritical power station boiler

A power plant boiler, flame combustion technology, applied in the direction of combustion method, combustion type, combustion equipment, etc., can solve the problems of poor combustion stability under low load and other problems

Active Publication Date: 2015-06-17
章礼道
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are also successful cases of using anthracite coal or low-volatile lean coal power plant boilers in thermal power plants in the prior art, with front and rear wall hedging and four-corner tangential combustion methods, but the low-load stable combustion performance is poor

Method used

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  • Half-W-shaped flame burning supercritical power station boiler
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Embodiment 1

[0032] Combine now figure 1 Taking a 1000MW level, once-reheated Π-type supercritical utility boiler with a design value of main steam temperature / reheated steam temperature of 605°C / 613°C as an example, the optimal way of realizing the invention is illustrated.

[0033] The semi-"W" flame combustion supercritical power plant boiler of the present invention includes a lower furnace with a front arch and a rear arch; two rows of weak swirl burners are respectively arranged on the front arch of the lower furnace and the rear arch of the lower furnace; each row consists of 8 burners Composed of weak swirl burners, uniformly distributed along the furnace width; each row of weak swirl burners is connected with a double-inlet and double-outlet steel ball mill; one row is arranged at the lower part of the front wall of the lower furnace and the rear wall of the lower furnace Double air-regulating swirl burners; each column is composed of 8 double-air swirling burners, which are evenl...

Embodiment 2

[0035] Combine now figure 2 Taking a 1000MW level, once-reheated Π-type supercritical utility boiler with a design value of main steam temperature / reheated steam temperature of 605°C / 613°C as an example, the optimal way of realizing the invention is illustrated.

[0036] The semi-"W" flame combustion supercritical power plant boiler of the present invention includes a lower furnace with a front arch and a rear arch; two rows of weak swirl burners are respectively arranged on the front arch of the lower furnace and the rear arch of the lower furnace; each row consists of 8 burners Composed of weak swirl burners, uniformly distributed along the furnace width; each row of weak swirl burners is connected with a double-inlet and double-outlet steel ball mill; one row is arranged at the lower part of the front wall of the lower furnace and the rear wall of the lower furnace Double air-regulating swirl burners; each column is composed of 8 double-air swirling burners, which are even...

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Abstract

The invention discloses a half-W-shaped flame burning supercritical power station boiler, and relates to a power station boiler which is used in a thermal power station, burns anthracites or low volatile lean coals, has a supercritical steam condition. The half-W-shaped flame burning supercritical power station boiler comprises a lower hearth with a front arch and a rear arch, the front arch and the rear arch of the lower hearth are respectively provided with two rows of weak vortex burners, and the slightly lower parts of a front wall and a rear wall of the lower hearth are respectively provided with one line of dual register burners. One layer or two layers of separated secondary air nozzles are arranged at the parts of front wall and rear wall of the upper hearth, which are away from the bottom of a platen superheater by 8m-12m. Each row of burners is arranged uniformly along the furnace width. According to the half-W-shaped flame burning supercritical power station boiler, the furnace side thermal deviation of the lower hearth water-wall tube is reduced significantly, the water circulation reliability is improved significantly, the Nox generation amount is decreased significantly, and the half-W-shaped flame burning supercritical power station boiler can adopt a less-oil or oil-free pulverized coal ignition technology easily, can be easily in large scale and can be used for designing and manufacturing the supercritical power station boiler which is in 1000MW level and burns anthracites or low volatile lean coals.

Description

(1) Technical field: [0001] The invention relates to a semi-"W" flame-combustion supercritical power station boiler, which relates to a new boiler type of a power station boiler with supercritical steam parameters that burns anthracite or low-volatility lean coal and has supercritical steam parameters. (two) background technology: [0002] The typical furnace type of anthracite or low volatile lean coal used in thermal power plants in the prior art is a "W" flame combustion boiler with subcritical steam parameters or supercritical steam parameters; "W" flame combustion boilers with supercritical steam parameters The lower furnace water wall of the W" flame combustion boiler uses low mass flow rate technology without exception, and the excessive thermal deviation of the lower furnace water wall along the furnace width will lead to the loss of positive flow self-compensation characteristics, endangering the operation of the lower furnace water wall Safety. [0003] The burner...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/32F23C7/02
Inventor 章礼道
Owner 章礼道
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