Small Wave Flame Disturbance Extended Combustion Device

A combustion device and flame technology, which is applied in the field of wavelet type flame disturbance expansion combustion device, can solve problems such as unfavorable rotating airflow, poor adaptability of coal types, and poor coal seam ignition conditions, and achieves improved ignition conditions, increased flue gas temperature, and improved adaptability sexual effect

Inactive Publication Date: 2017-02-08
北京中煤神州节能环保技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ignition of coal mainly depends on the radiant heat of the furnace flame and the arch, so the upper coal is ignited first, and then gradually burns downward. It is a single-sided ignition method, and the ignition conditions are poor, resulting in a small range of coal quality.
In the past, the rear arch design with simple upward inclination and arc-shaped exit was almost adopted at home and abroad, so that most of the high-temperature flue gas flows upward at the turn of the exit of the rear arch, which is not conducive to the formation of strong swirling airflow and is not conducive to the ignition of coal seams. effect
Similarly, there is an uneven distribution of air volume along the width of the grate
The inherent combustion characteristics of the above-mentioned chain furnace lead to poor coal seam ignition conditions in actual operation, poor adaptability of coal types, and low-quality coal are difficult to ignite

Method used

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  • Small Wave Flame Disturbance Extended Combustion Device
  • Small Wave Flame Disturbance Extended Combustion Device
  • Small Wave Flame Disturbance Extended Combustion Device

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as Figure 1-4 As shown, the hearth 20 of the chain furnace includes a fire grate 21, a front arch 22, a rear arch 23, and an outlet window 25. The coal seam 24 moves slowly in the furnace chamber with the fire grate 21, and air is continuously blown into the furnace chamber from the bottom of the fire grate 21 to help The coal seam 24 burns, and the air blown into the furnace cavity simultaneously forms high-temperature flue gas with combustible particles and flows toward the outlet window 25. The present invention provides a wavelet flame disturbance expansion combustion device 10, comprising a main body 11 and at least two grooves 12, the main body 11 is a hexahedron, and the hexahedron includes an upper surface 113, a lower surface 114, a front surface 111, and a rear surface 112 , a side surface 115 and a side surface 116, the upper surface 113 is inclined at an acute angle with the horizontal plane, and the lower surface 114 is horizontal. A groove 12 is for...

Embodiment 2

[0027] In order to further enhance the disturbance effect of the small-wave flame disturbance expansion combustion device on high-temperature flue gas, another small wave flame disturbance expansion combustion device is provided in this embodiment.

[0028] Such as Figure 5 As shown, the present invention provides a small-wave flame disturbance expansion combustion device 10, including a main body 11 and at least two grooves 12, the structure of this embodiment is substantially the same as that of Embodiment 1, the difference is that this embodiment For example, the axes of the grooves 12 and the lower surface of the main body 11 are not perpendicular to each other, but are inclined at an angle to the lower surface, and the inclination directions of two adjacent grooves 12 are opposite. When the high-temperature flue gas passes through the inclined grooves 12, The flow channel increases, and the flue gas flows in opposite directions, which further enhances the disturbance of ...

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Abstract

The invention provides a small-wave flame disturbance extension combustion device, which comprises a main body and at least two grooves, wherein the main body is a hexahedron; the hexahedron comprises an upper surface, a lower surface, a front surface, a back surface and two side faces; the side faces are fixedly connected with the side wall of a chain furnace; the back surface is fixedly connected with the front arch surface or the back arch surface of the chain furnace; and the front end of the main body passes from the upper surface to the lower surface, so that the grooves are formed. Due to the adoption of the small-wave flame disturbance extension combustion device provided by the invention, the disturbance of flue gas is enhanced remarkably, the combustion of combustible matters in the flue gas is enhanced, the temperature of the flue gas is raised, thermal radiation on a coal bed is enhanced, the coal bed firing condition of the chain furnace can be improved remarkably, and the adaptability of the chain furnace to coal quality is enhanced. The small-wave flame disturbance extension combustion device is suitable for boiler design and technical reconstruction of the conventional boiler.

Description

technical field [0001] The invention relates to the technical field of suspension combustion of coal-fired boilers, in particular to a wavelet-type flame disturbance expansion combustion device which improves the ignition conditions of the coal-fired layer of chain boilers and strengthens the disturbance combustion of flue gas. Background technique [0002] The chain furnace belongs to the moving layer combustion, and its working method is that after the coal falls from one end of the grate onto the grate surface and enters the furnace, it gradually moves slowly from front to back with the grate, and the air required for combustion passes through the gap of the grate from bottom to top perpendicular to the moving coal seam. The ignition of coal mainly depends on the radiant heat of the furnace flame and arch, so the upper coal is ignited first, and then gradually burns downward. In the past, the rear arch design with simple upward inclination and arc-shaped exit was almost ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23B30/08
Inventor 刘晓波
Owner 北京中煤神州节能环保技术开发有限公司
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