Oil-free directly-ignited burner for induced heating coal powder boiler

An ignition burner and induction heating technology, applied in the field of pulverized coal boilers, can solve the problems of large maintenance workload of fuel oil system, reduce power generation economy, increase power generation cost, etc., achieve small daily maintenance, reduce ignition power consumption, operation stable effect

Inactive Publication Date: 2004-09-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] A large amount of oil used for ignition and stable combustion greatly increases the cost of power generation and reduces the economy of power generation. The maintenance workload of the fuel system is heavy, and the co-combustion of oil and coal is likely to produce a large amount of NOx and SOx, causing serious environmental pollution.

Method used

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  • Oil-free directly-ignited burner for induced heating coal powder boiler
  • Oil-free directly-ignited burner for induced heating coal powder boiler
  • Oil-free directly-ignited burner for induced heating coal powder boiler

Examples

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Embodiment Construction

[0019] The utility model relates to an induction heating oil-free direct ignition burner for a pulverized coal boiler, which has a power supply system, a cooling water system and an igniter body.

[0020] like figure 1 As shown, the igniter body has a primary igniter and a secondary igniter, and the primary igniter has a pulverized coal inlet 2 with an observation hole 1 and a metal induction tube 3 in turn. Layer 4, an inductor 5 is provided on the outer side of the insulation layer, a sealing flange 8 and an annular air chamber 10 are arranged outside the outlet of the metal induction tube 5, a sealing material 9 is provided between the flanges 8, and a stable combustion chamber is provided at the outlet of the annular air chamber 10 Chamber 7, the igniter secondary has secondary pulverized coal inlet 6, fire viewing hole 11, secondary ignition chamber 12 in turn, and a diversion partition 13 is provided between the secondary ignition chamber 12 and the stable combustion cha...

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PUM

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Abstract

The oil-free directly-ignited burner for induced heating coal powder boiler has power source system, cooling water system and igniter. The igniter includes one first stage and one second stage, the first stage has the first coal powder inlet, inducing metal pipe with heat insulating layer, inducer outside the heat insulating layer, sealing flange with sealing material outside the inducing metal pipe outlet, ring blast chamber, and combustion stabilizing chamber in the outlet of the ring blast chamber; the second stage has the second coal powder inlet, fire observing hole, the second igniter and flow guiding partition set between second igniter and the combustion stabilizing chamber. The present invention has the advantages of cold start and flow stabilization of coal powder boiler without oil, gas and other supplementary material, convenient regulation, stable running, multistage ignition, low running cost, less maintenance and high reliability.

Description

technical field [0001] The invention relates to a pulverized coal boiler, in particular to an induction heating oil-free direct ignition burner for a pulverized coal boiler. Background technique [0002] Coal-fired thermal power generation is the main power generation method adopted in my country at present. In my country, the installed capacity of coal-fired generators accounts for about 70% of the total installed capacity in the country. The start, stop and stable combustion of large coal-fired boilers consume a lot of fuel. [0003] The traditional way of igniting boilers in power plants is oil gun ignition. When the boiler is started, the fuel gun is first lit. After the oil burns in the furnace for a certain period of time, the furnace is heated to the ignition temperature of the pulverized coal. At this time, the pulverized coal is sprayed into the furnace for mixed combustion with kerosene. When the boiler reaches more than 50% load and the pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q7/02F23Q13/02
Inventor 岑可法周俊虎周志军刘建忠黄镇宇程军杨卫娟
Owner ZHEJIANG UNIV
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