Automatic combustion stabilizing system used for opposed-firing boiler

A boiler, automatic technology, applied in the combustion of block fuel and liquid fuel, the combustion of block fuel and gaseous fuel, the combustion of block fuel and powder fuel, etc., can solve the problem of large oil consumption and consumption. problems such as large oil volume, to achieve the effect of improving combustion-supporting capacity and novel installation location

Active Publication Date: 2017-10-03
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of large oil consumption of the swirl burner of the opposing boiler in the process of low-load stable combustion, especially for boilers burning low-quality coal, the oil consumption is very huge

Method used

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  • Automatic combustion stabilizing system used for opposed-firing boiler
  • Automatic combustion stabilizing system used for opposed-firing boiler
  • Automatic combustion stabilizing system used for opposed-firing boiler

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Embodiment Construction

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0027] Such as figure 1 As shown, in this embodiment, an automatic combustion stabilization system for a counter-boiler includes a high-temperature superheater 2, an oxygen heating device 3, a low-temperature reheater 5, a swirl burner 6, a high-temperature oxygen lance assembly 7 and coal The powder pipe elbow 8, the high-temperature superheater 2, the oxygen heating device 3 and the low-temperature reheater 5 are sequentially arranged in the flue 4 at the tail of the opposing boiler along the flue gas flow direction, and the swirl burner 6 is arranged in the furnace of the opposing boiler 1 On the front and rear walls of the lower part, the pulverized coal pipe elbow 8 is connected to the inlet of the swirl burner...

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Abstract

The invention belongs to the field of lower-load combustion stabilizing of large power station boilers, and particularly relates to an automatic combustion stabilizing system used for an opposed-firing boiler, and the automatic combustion stabilizing system mainly solves the problem that oil consumption is great during low-load combustion stabilizing of the opposed-firing boiler. The automatic combustion stabilizing system comprises a high-temperature superheater, an oxygen gas heating device, a low-temperature reheater, a swirling burner, a high-temperature oxygen lance assembly, a pulverized coal tube elbow and the like. According to the automatic combustion stabilizing system, oxygen gas is heated to 800 DEG C by high-temperature flue gas on the tail part of the boiler, and is conveyed to a spray hole of the swirling burner to mix with pulverized coal turbulent gas flow through a high-temperature oxygen gas assembly; pulverized coal combustion is stabilized through high-temperature characteristics and strong oxidability of the high-temperature oxygen gas assembly, and needs of different operation working conditions can be met by changing a dispersion angle of high-temperature oxygen gas and reflux strength of high-temperature flue gas, so that lowest oil-free combustion stabilizing load of the boiler can be reduced to be 20% of rated load, and therefore, the oil-free combustion stabilizing purpose is realized.

Description

technical field [0001] The invention belongs to the field of low-load stable combustion of large-scale power station boilers, and in particular relates to an automatic stable combustion system for countering boilers. Background technique [0002] Power plant boilers often run at low load for a long time during deep peak shaving, and oil guns are needed to support combustion, which has caused a heavy economic burden to users. According to statistics, a 600MW large-scale utility boiler consumes an average of about 400 tons of oil per year for stable combustion. [0003] In response to this situation, my country has developed various fuel-saving and stable combustion technologies to solve this problem: [0004] The oil-free and stable combustion technology represented by plasma ignition and high-temperature air ignition technology has many patents, such as a plasma ignition device (CN1230659) for directly igniting pulverized coal boilers in power plants, a plasma ignition comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/28F23L7/00
CPCF23C5/28F23L7/007F23C2700/066F23L2900/07006F23L2900/07005Y02E20/32Y02E20/34
Inventor 闫高程吴娇
Owner SHANXI UNIV
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