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Cracking ignition device for pulverized coal fired boiler

An ignition device, pulverized coal boiler technology, applied in the direction of combustion ignition, incandescent ignition, combustion method, etc.

Inactive Publication Date: 2006-07-19
赵龙章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the above-mentioned ignition device, the present invention provides a cracking ignition device with a new structure, which fundamentally solves the problem of the life of the existing plasma ignition cathode and anode, and realizes the ignition and stable combustion of the boiler without a drop of oil. Under the condition of above 0°C, the boiler can be directly ignited with pulverized coal in a cold state, so that the boiler can be started without oil input until the main burner is put into operation and runs stably, which can fully meet the performance requirements of the boiler temperature and pressure increase

Method used

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  • Cracking ignition device for pulverized coal fired boiler
  • Cracking ignition device for pulverized coal fired boiler

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Experimental program
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Effect test

Embodiment 1

[0011] Referring to accompanying drawing 1, a kind of cracking ignition device that is used for pulverized coal boiler comprises a cracking furnace 2, and cracking furnace 2 upper ends are provided with safety valve 1 and feeding system 8, and feeding system 8 can adopt screw conveyor, conveyer belt or Chain bucket conveyor. A slagging system 11 is provided at the bottom of the cracking furnace 2, a heating device 9 is provided near the bottom of the furnace cavity, and a cracking medium supply system 10 is installed below the heating device 9. The heating device 9 can use the plasma generator as a heat source in an oxygen-free environment, and use plasma heating to promote coal cracking; it can also use local combustion heating or electric heating of part of the coal, and use the combustion of part of the coal in the furnace to cause local high temperature to promote coal cracking. The cracking method, adopting this method needs to carry out the cracking medium in the crackin...

Embodiment 2

[0014] Referring to accompanying drawing 2, a kind of pyrolysis ignition device that is used for pulverized coal boiler, this ignition device is not provided with heating device 9, but installs combustible gas feedback heating system 18 on the gas output pipe, the other end of combustible gas feedback heating system 18 It communicates with the bottom of the cracking furnace 2, and uses the combustible gas fed back to heat the coal 16 in the furnace to crack in an oxygen-free or low-oxygen environment. The rest are the same as in Embodiment 1.

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Abstract

The invention relates to a power plant ignition device, especially providing a crack ignition device used in firepower coal boiler. It comprises a crack furnace (2), a feeding system (8) inside the crack furnace (2), a crack medium feeding system (10) and a slag discharge system (11). Wherein, the furnace chamber contains a heating device (9); the crack furnace (2) has a gas output tube; or it can mount a fuel gas feedback heating system (18) on the gas output tube to replace the heating device (9); the another end of fuel gas feedback heating system (18) is through to the furnace chamber of crack furnace (2); the end of output tube has a ignition burning head (4) which is connected to the burner (5) of boiler or directly burn the coal powder inside the furnace chamber. The invention has the advantages that: it has stable property, the cold and hot resistance and long service life; when the boiler is started, it can be used as ignition burner and when in normal burning, it can be used as main burner; and it is compatible with the boiler.

Description

Technical field: [0001] The invention relates to an ignition device for a power plant, in particular to a pyrolysis ignition device suitable for use as an ignition device on a pulverized coal boiler for thermal power generation. Background technique: [0002] my country is a big country of thermal power generation. Most of the ignition and stable combustion of large industrial pulverized coal boilers are realized by burning light oil and heavy oil. In recent years, the price of crude oil has continued to rise, and the fuel oil used for thermal power generation has become more and more restricted; for thermal power plants burning lean coal, more oil is used for ignition, low-load stable combustion, and combustion support. A large amount of fuel consumption, as well as the corresponding costs of fuel purchase, transportation, storage, hardware equipment, etc. have also greatly increased the cost of power generation. Therefore, direct ignition of oil-free or less-oil pulverized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q7/02
Inventor 赵龙章王恺戴永祥
Owner 赵龙章
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