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Few oil ignited coal powder burner for low grade coal

A technology of pulverized coal burner and less oil ignition, which is applied to burners, burners for burning powder fuel, combustion methods, etc., can solve problems such as poor combustion effect, and achieve the effects of high temperature resistance and improved burnout rate.

Inactive Publication Date: 2008-02-13
YANTAI LONGYUAN POWER TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a low-oil ignition pulverized coal burner suitable for low-quality coal, so as to solve the problem that the low-oil ignition pulverized coal burner is used for burning low-quality coal and has poor combustion effect

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  • Few oil ignited coal powder burner for low grade coal

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Embodiment Construction

[0012] The concrete structure of the present invention is referring to Fig. 1. The central tube 1 of the main body of the oil-less ignition pulverized coal burner is made of refractory material. Outer sleeve 2 is cast by wear-resistant steel, plays certain wear-resistant function. The central cylinder 1 of the main body is placed in the outer sleeve 2, and their central axes coincide. An annular thickening block 3 is fixed inside the barrel on the mouth side of the outer sleeve 2, the outer peripheral side surface of the annular thickening block is nested with the inner wall of the outer cylinder, and the inner peripheral side surface forms a triangular slope along the direction of the central axis. structure. See Figure 2 and Figure 3 for the structure of the shade block. The thickness block 3 on the outer sleeve plays the role of introducing the outer layer of pulverized coal into the center of the flame. Because it is in direct contact with the flame, it is made of heat-...

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Abstract

The invention discloses a little-oil ignition coal powder combustor applicable for the inferior coal. The invention comprises a central cylinder made of refractory materials, an external sleeve cast with wearable steel and a rich-lean block in the external sleeve. The central cylinder is arranged in the external sleeve, and a central axis of the cylinder overlaps with that of the external sleeve. The annular rich-lean block is fixed in a cylinder at one side of a mouth of the external sleeve. The external perimetric side of the rich-lean block is fit into an internal wall sleeve of the external sleeve, and forms a triangle inclined plane along the direction of the central axis. The advantage and favorable effect of the invention is that a high-temperature radiate body is formed in the course of ignition to realize the high-temperature cracking of coal powder and reproducing of volatile matter, so the inferior coal with a very high kindling temperature is well ignited to promote the complete combustion rate of the inferior coal; the central cylinder is provided with a very high resistant temperature, so the problem of overtemperature will not be caused.

Description

technical field [0001] The invention relates to an oil-less pulverized coal burner suitable for low-quality coal. Background technique [0002] The oil-less ignition pulverized coal burner is an essential part in the oil-less ignition system. At present, most of the pulverized coal burners used in low-oil ignition systems are developed based on bituminous coal. Because bituminous coal has a high volatile content and low ignition temperature, it is easy to be ignited, so the engineering application is good. In our country, low-quality coal units account for a considerable part. Therefore, once the low-oil ignition pulverized coal burner developed based on bituminous coal is used to burn low-quality coal, the pulverized coal burnout rate is very low, and the combustion effect is poor. The fuel-saving rate of the low-oil ignition system will drop significantly, and this low burnout rate of pulverized coal has also brought hidden dangers to the safety of the unit. Contents of...

Claims

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Application Information

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IPC IPC(8): F23D1/00
Inventor 王雨蓬蔡巍王雨勃杨生贵马淮军李本伟刘升飞纪少华王新光张玉锋任志鹏刘广义李金光
Owner YANTAI LONGYUAN POWER TECH
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