Micro-oil plasma composite ignition and combustion-stabilization method and device therefor

A plasma point and plasma technology, which is applied in the ignition field during the start-up and stable combustion of pulverized coal boilers of thermal power generation units, can solve the problems of affecting fuel saving effect, failure of arc ignition, easy oxidation damage of plasma generators, etc., and achieves improvement The effect of comprehensive economic benefits, reducing electrode loss rate, and reducing maintenance workload

Inactive Publication Date: 2007-05-16
艾佩克斯科技(北京)有限公司
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Problems solved by technology

However, because the power increase of the plasma generator is limited by the existing technical level, the maximum power of the current domestic plasma generator is 300KW, and the power of 300KW is often unable to ignite the pulverized coal airflow of difficult-to-ignite coal, and when the coal type is changeable It is not easy to ignite the pulverized coal airflow; the cathode and anode of the plasma generator are easily oxidized and damaged, often causing arc ignition failure; moreover, the structure of the device is complex, which increases the workload of adjustment and maintenance
The above problems all affect the normal use of the plasma igniter, and when the unit is running at low load and requires stable combustion, it is often not put into use in time, and a large oil gun is still required to be used for stable combustion, which affects the fuel-saving effect

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  • Micro-oil plasma composite ignition and combustion-stabilization method and device therefor

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Embodiment Construction

[0016] As shown in Figure 1, the device used in the micro-oil plasma composite ignition and stable combustion method of the present invention includes a primary air pipe 1, a combustion pipe 2, a perimeter air box 3, a film cooling air duct 4, and an anti-coking air duct arranged in the boiler burner. The tuyere 5, the combustion pipe 2 are concentrically arranged in the inner cavity of the primary air pipe 1 and the axial length of the combustion pipe 2 is smaller than the axial length of the primary air pipe 1, and the two ends of the combustion pipe 2 are connected to the corresponding two ends of the primary air pipe 1 There is a certain distance between them, the first-stage combustion chamber A is formed in the inner cavity of the combustion pipe 2, the second-stage combustion chamber B is formed between the end of the combustion pipe 2 and the end of the primary air pipe 1, and the third-stage combustion chamber is formed outside the primary air pipe 1. Level combustion ...

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Abstract

The micro oil plasma complex ignition and stable burning method ignites the coal powder by assisting the plasma igniter with micro oil ignition. It can use micro oil ignition to light the coal powder air stream reliably when the plasma igniter is not available. When the power is not sufficient, the assistant oil gun mist spray will complement the ignition energy, achieving the goal of replacing oil and saving fuels.

Description

technical field [0001] The invention relates to an ignition method, in particular to an ignition method in the process of starting and stabilizing a pulverized coal boiler of a thermal power generation unit. Background technique [0002] At present, the peak-to-valley difference in the power supply of major power grids in my country is increasing day by day. When the load is low, many large units must operate under low load, and small units must be shut down for backup. In the process of boiler start-up and low-load stable combustion, a large oil gun is used, which consumes a lot of fuel. In order to save fuel, some large units are equipped with plasma ignition devices. Plasma ignition technology is an oil-free ignition technology, which directly ignites the pulverized coal airflow with a small-energy plasma arc, thereby realizing the substitution of coal for oil. However, because the power increase of the plasma generator is limited by the existing technical level, the ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q7/08F23C5/00F23D1/00
Inventor 李硕郭秀峰
Owner 艾佩克斯科技(北京)有限公司
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