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Micro-oil ignition burner

A technology for igniting a burner and a small amount of oil, which is applied to burners, burners for burning powder fuel, and combustion methods, etc. problems, to achieve the effect of wide adaptability of coal types, high cost performance, moderate investment and operating costs

Active Publication Date: 2013-12-25
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are a large number of successful application examples of micro-oil ignition in domestic power plant boilers that use bituminous coal as power coal. Pulverized coal airflow is easily ignited
However, the low-volume ignition technology has poor adaptability to coal types with low volatile content such as anthracite, lean coal, and low-quality bituminous coal. The micro-oil ignition technology used in domestic lean-coal boilers is basically the supply of large and small oil guns. Only when the amount of oil is used in the oven can it be ignited. As a result, it loses the meaning of saving fuel by igniting with a small amount of oil
[0005] Second, when the micro-oil ignition technology is used, the combustion of oil requires air distribution, which consumes oxygen, and it is easy to "grab oxygen" from the primary air, which makes it difficult for the primary air to ignite the pulverized coal airflow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 , image 3 and Figure 4 , A micro-oil ignition burner in an oxygen-enriched environment of the present invention includes a small oil gun 1 and a burner 2 for micro-oil gasification. The burner 2 contains a sleeve 9, and the small oil gun 1, the burner 2 and the sleeve 9 are arranged in a coaxial direction. The first oxygen conduit 3 is installed on the inner wall of the left end of the sleeve 9 facing the direction of the pulverized coal gas flow. In addition to providing oxygen, the first oxygen conduit 3 also acts as a pulverized coal concentration ring. The first oxygen conduit 3 faces the pulverized coal. The outer side of the pipe wall in the direction of the pulverized gas flow is made of wear-resistant metal, and the first oxygen conduit 3 is arranged with an axial rotating blade on the pipe wall facing away from the direction of the pulverized coal gas flow. A local oxygen-enriched zone is formed in the sleeve 9 and adjacent areas. The se...

Embodiment 2

[0028] refer to figure 2 , image 3 and Figure 4 , the difference between this embodiment and Embodiment 1 is that the micro-gasification small oil gun 1 is inserted into the burner from the radial direction of the burner 2, and the high-temperature smoke after the gasification oil mist emitted by the micro-gasification small oil gun is burned Gas can be filled in the sleeve 9 .

Embodiment 3

[0030] refer to image 3 As shown, in this embodiment, the cross-sectional shape of the oxygen conduit is a trapezoid, and the wall surface facing the direction of the pulverized coal gas flow is surfacing with anti-wear metal or anti-wear ceramics. Axial rotating blades are arranged on the wall surface away from the direction of the pulverized coal gas flow, and oxygen enters the burner in a swirling manner to be mixed with the pulverized coal.

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Abstract

The invention discloses a micro-oil ignition burner, comprising a small micro-oil-gasification oil gun and a burner, wherein the burner internally comprises at least one coaxial or non-coaxial sleeve, two oxygen guiding pipes are installed in the burner, one oxygen guiding pipe is installed on the inner wall of the sleeve facing the direction of air flow of pulverized coal, the other oxygen guiding pipe is installed on the inner wall of the burner, oxygen can enter the burner and the annular space of the sleeve through the oxygen guiding pipes, and oxygen-rich zones are formed in the burner and the flowing space of the air flow of the pulverized coal in the boiler so as to enhance the burning of the air flow of the pulverized coal.

Description

technical field [0001] The invention belongs to the field of thermal boilers, relates to boiler accessories, in particular to a micro-oil ignition burner. Background technique [0002] The traditional method of ignition of power station boilers is oil gun ignition. When the boiler is ignited and started, the fuel gun is first ignited. 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 airflow. When the boiler reaches a load of more than 50% and the pulverized coal gas flow can be stably burned, the fuel oil is gradually removed to complete the boiler ignition and start-up process. In order to save costs and reduce the fuel oil consumption of power station boilers, many domestic companies have developed micro-oil ignition technology, which has been widely used in many power station boilers. [0003] However, due to the great differences in coal quality of power coals from different origin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00F23D1/02
CPCY02E20/34
Inventor 郑路张建文陈飞张翔
Owner SHANGHAI BOILER WORKS
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