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Pulverized coal concentration regulating device

A technology of concentration adjustment and pulverized coal, which is applied in the direction of adjusting fuel supply, combustion method, and control of combustion, and can solve problems such as poor ignition effect, changes in ventilation volume and pressure, and adverse effects on ignition effect.

Pending Publication Date: 2020-06-09
YANTAI LONGYUAN POWER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The pulverized coal burner using plasma ignition technology has the most suitable pulverized coal concentration range for ignition under a certain structure and certain working conditions, but when the operating conditions change, the pulverized coal concentration in the core ignition area will change and deviate from the optimal range. Ignition concentration range, reducing ignition effect
In addition, when the coal quality of pulverized coal changes, the concentration of pulverized coal most suitable for ignition will also change accordingly, resulting in poor ignition effect
[0004] At present, most of the existing pulverized coal concentrators adopt a fixed structure, and the adjustment performance is poor. When the operating conditions change, the pulverized coal concentration in the core ignition area is not easy to adjust accordingly, which makes the ignition effect of the pulverized coal burner worse. , is not conducive to the normal operation of the pulverized coal burner
Although in some pulverized coal concentrators, the adjustment of the opening of the adjustable splitter plate can be used to adjust the concentrating effect of pulverized coal, this adjustment method will not only cause changes in the ventilation volume and pressure of the pulverized coal airflow pipeline, but also change the The wind speed in the core ignition area will adversely affect the ignition effect

Method used

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  • Pulverized coal concentration regulating device
  • Pulverized coal concentration regulating device
  • Pulverized coal concentration regulating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention provides a pulverized coal concentration adjustment device, such as figure 1 As shown, the pulverized coal concentration regulating device includes a pulverized coal pipe 1, a combustion chamber 3, an igniter 4 and a regulating plate 5, the combustion chamber 3 is installed at the end of the pulverized coal pipe 1, and the pulverized coal pipe 1 is used to feed the combustion chamber The pulverized coal airflow is conveyed in the body 3, and the pulverized coal airflow burns in the combustion chamber 3. The igniter 4 is connected to the combustion chamber 3, and the end of the igniter 4 is inserted into the combustion chamber 3 for ignition and combustion. The pulverized coal in the cavity 3 realizes ignition; the adjusting plate 5 is arranged in the inner cavity of the pulverized coal pipe 1, and is rotatably connected to the inner wall of the pulverized coal pipe 1, so that the amount of pulverized coal entering the conveying inner chamber 21 can be contr...

Embodiment 2

[0043] In this example, if Figure 4 As shown, the difference between the pulverized coal concentration adjustment device and the first embodiment is that the first embodiment changes the distribution ratio of the pulverized coal in the conveying inner chamber 21 and the outer chamber 22, and then controls the amount of concentrated coal powder entering the core ignition area 100, The rotating shaft in the pulverized coal regulating device provided in this embodiment is arranged in the delivery outer cavity 22 of the elbow 12 to change the distribution relationship of the pulverized coal input inside the outer cavity 22 .

[0044] In this embodiment, when the operating condition of the pulverized coal burner changes, if the splitter plate is rotated to change the distribution of pulverized coal in the outer chamber 22, the pulverized coal in the outer chamber 22 will be distributed to the pulverized coal in the core ignition area 100. The amount is increased to adapt to change...

Embodiment 3

[0046] In this example, if Figure 5 As shown, the difference between the pulverized coal concentration adjustment device and the first embodiment is that the first embodiment changes the distribution ratio of the pulverized coal in the conveying inner chamber 21 and the outer chamber for conveying, and then controls the amount of concentrated pulverized coal entering the core ignition area 100. The rotating shaft in the pulverized coal regulating device provided in the embodiment is set in the conveying cavity 21 of the elbow 12 to change the distribution relationship of pulverized coal inside the input cavity 21 .

[0047] In this embodiment, when the operating condition of the pulverized coal burner changes, if the splitter plate is rotated to change the distribution of pulverized coal in the delivery cavity 21, the pulverized coal in the delivery cavity 21 will be distributed to the coal in the core ignition area 100. The amount of powder is increased to adapt to changes i...

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Abstract

The invention belongs to the technical field of a burner, and discloses a pulverized coal concentration regulating device. The pulverized coal concentration regulating device comprises a pulverized coal pipe, a combustion chamber body, an igniter and a regulating plate, wherein the pulverized coal pipe comprises a straight pipe part and an elbow part, and the elbow part is arranged in the straightpipe part; a division plate is arranged in the pulverized coal pipe, and the inner chamber of the pulverized coal pipe is divided into an inner conveying chamber close to the minor diameter side of the elbow part and an outer conveying chamber far away from the minor diameter side of the elbow part; the combustion chamber body is connected with the tail end of the elbow part, and the inner conveying chamber and the outer conveying chamber communicate with the combustion chamber body; the igniter is arranged on the combustion chamber body, and the tail end of the igniter is arranged in the combustion chamber body; the regulating plate is arranged in the inner chamber of the pulverized coal pipe, and a ventilation gap is formed between the regulating plate and the division plate; and the regulating plate is rotationally connected on the inner wall of the pulverized coal pipe and can regulate the quantity of pulverized coal entering the inner conveying chamber. The pulverized coal concentration regulating device can regulate the pulverized coal concentration in a core ignition region and reduce the influence on the wind speed in the core ignition region at the same time to ensure theignition effect of the pulverized coal burner.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a pulverized coal concentration regulating device. Background technique [0002] Since the energy structure in our country is mainly based on coal, pulverized coal burners are widely used in the field of burners. Plasma ignition technology has been used in the field of pulverized coal burners in my country for 20 years, and has been widely used in the field of pulverized coal burners. Improving the coal quality adaptability and ignition performance of plasma ignition technology can improve the plasma The application effect of ignition technology is of great significance to the continuous application and development of plasma ignition technology. [0003] The pulverized coal burner using plasma ignition technology has the most suitable pulverized coal concentration range for ignition under a certain structure and certain working conditions, but when the operating conditions change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/00F23N5/00
CPCF23N1/00F23N5/00
Inventor 宋林波龚泽儒朱新龙郑艳丽邹鹏王晓娜刘佳林许金辉李冬杨金杰
Owner YANTAI LONGYUAN POWER TECH
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