a pulverized coal burner

A burner and pulverized coal technology, which is applied in the direction of burners, burners for burning powder fuel, and combustion methods, etc., can solve problems such as furnace negative pressure fluctuations, falling off, and affecting the stable operation of the burner, so as to increase the mixing intensity and promote The effect of ignition and stable combustion

Active Publication Date: 2015-07-29
YANTAI LONGYUAN POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coke block blocks the air flow channel of the burner, affecting the stable operation of the burner; when the coke block is large, it will fall off under the action of gravity, causing negative pressure fluctuations in the furnace, which seriously affects the safe operation of the boiler

Method used

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  • a pulverized coal burner
  • a pulverized coal burner
  • a pulverized coal burner

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 It is a burner with an expanding cone-shaped pulverized coal nozzle and its flow field distribution diagram in the prior art. The primary air pulverized coal airflow passes through the pulverized coal airflow channel 101 and enters the furnace from the inner side of the pulverized coal nozzle 201 . The pulverized coal nozzle 201 is in the shape of an expanded cone, and the flow area along the direction of the pulverized coal airflow gradually increases. A secondary air passage 102 is arranged around the pulverized coal air passage (primary air passage) 101 for sending combustion-supporting air into the furnace. A secondary air swirling device 202 is usually provided in the secondary air channel 102 to rotate the secondary air flow. When the secondary air flow passes through the outer surface of the pulverized coal nozzle 201, the dir...

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PUM

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Abstract

The application relates to a burner with expanded-taper-shaped pulverized coal nozzle, in particular to a pulverized coal burner, which comprises a primary air passage arranged on the upstream of the nozzle and a secondary air passage which is coaxially arranged around the primary air passage, wherein a secondary air cyclone device is arranged in the secondary air passage. The pulverized coal burner disclosed by the invention is characterized in that the position at the radial outer side of the primary air passage, which is adjacent to the primary passage, is provided with an annular air flow passage communicated with the secondary air passage, and the annular air flow passage is arranged at the inner side of the expanded-taper-shaped pulverized coal nozzle.

Description

Technical field: [0001] The invention relates to the field of pulverized coal burners, in particular to a pulverized coal burner with an expanding cone nozzle. Background technique: [0002] In order to obtain a good pulverized coal combustion effect, the nozzle (primary air nozzle) of the pulverized coal burner is often in the form of an expanding cone, that is, the nozzle is trumpet-shaped, and its internal flow area gradually expands. The secondary air passage is arranged outside the primary air passage. Among them, primary air refers to the mixed air flow of pulverized coal and air used to carry pulverized coal and send it into the furnace of the boiler. [0003] The shape structure has the following two characteristics: [0004] 1. Make the secondary air flow outside the pulverized coal nozzle deviate from the axis of the burner and shoot outwards, delaying its mixing timing with the primary air pulverized coal flow, which is conducive to reducing the amount of NOx ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00
Inventor 苗雨旺王新光张玉斌范景利张昀李平伊磊崔星源
Owner YANTAI LONGYUAN POWER TECH
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