A C-shaped direct-flow burner for pulverized coal furnace

A pulverized coal furnace and burner technology, applied in the direction of burners, burners burning powder fuel, combustion methods, etc., can solve problems such as difficulty, achieve the effects of improving combustion characteristics, promoting low nitrogen emissions, and improving ignition stability

Active Publication Date: 2018-05-04
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measures and technologies have a certain effect on stabilizing combustion, but there are still deficiencies in actual working conditions, and there are certain difficulties in actual operation.

Method used

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  • A C-shaped direct-flow burner for pulverized coal furnace
  • A C-shaped direct-flow burner for pulverized coal furnace
  • A C-shaped direct-flow burner for pulverized coal furnace

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Embodiment Construction

[0027] The structures, proportions, sizes, etc. shown in the accompanying drawings of the description are only used to match the content disclosed in the description, for those who are familiar with the technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no Technically, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered. At the same time, terms such as "upper", "lower", "front", "rear", and "middle" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. , the change or adjustment of its relative relationship, without substantive changes in the technical content, should also be...

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Abstract

The invention provides a C-shaped direct-flow burner for a pulverized coal-fired boiler. The burner is arranged on the pulverized coal-fired boiler, and comprises a first direct-flow pipeline, a cambered pipeline, a second direct-flow pipeline and a nozzle, which are sequentially connected, wherein the outer wall of the nozzle is inwards sunken; the section of the end part of the nozzle forms a shape at least with a C-shaped; pulverized coal forms jet flow with a C-shaped cross section after being sprayed into a hearth, and is ignited on the tip of the C-shaped jet flow and the two sides adjacent to the tip to ignite a main jet flow part in little-flame ignition and double-sided ignition manners respectively. The burner has the comprehensive advantages of high ignition stability, high burnout degree and less NOx emission, the problem of difficulty in the ignition of anthracite, meager coal, brown coal and poor bituminous coal can be solved, and the burning performance of the pulverized coal-fired boiler can be remarkably improved.

Description

technical field [0001] The invention relates to a C-shaped straight-through burner for a pulverized coal furnace. Background technique [0002] In a pulverized coal furnace using a once-through burner, the ignition of pulverized coal is an important part of pulverized coal combustion. The ignition of pulverized coal is achieved when the jet of pulverized coal relies on convective mass transfer with ambient flue gas (flame) to raise the pulverized coal flow to the ignition temperature. In order to strengthen the ignition, the commonly used technologies mainly include reducing the ignition heat and increasing the convection of external smoke. Among them, the reduction of ignition heat can be divided into two types: integral type and partial type; the integral type is to reduce the overall heat of the primary air, such as reducing the primary air The wind speed allows the coal powder to be separated from the thick and thin, thereby increasing the primary air temperature, etc.;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00
CPCF23D1/00F23D2201/10
Inventor 缪正清彭彬彬韩宝驹李子祥
Owner SHANGHAI JIAOTONG UNIV
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