Online adjusting system for jet distribution of pulverized coal

A pulverized coal distribution and adjustment system technology, which is applied in the direction of block/powder supply/distribution, fuel supply regulation, combustion control, etc., can solve the problem of large pulverized coal distribution room and the inability to provide sufficient installation at the exit of the boiler pulverizer Space and other issues, to achieve the effect of system maintenance, high uniformity of pulverized coal distribution, and improved safety

Active Publication Date: 2018-10-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

According to this method, even when the concentration of pulverized coal particles in a specific cross-sectional portion of the pulverized coal distribution chamber is high, the distribution of pulverized coal in the pulverized coal distribution chamber can be made uniform by swirl flow, but the method requires The distribution chamber is too large to provide enough installation space at the outlet of the boiler pulverizer

Method used

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  • Online adjusting system for jet distribution of pulverized coal
  • Online adjusting system for jet distribution of pulverized coal
  • Online adjusting system for jet distribution of pulverized coal

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Embodiment

[0031] figure 1 Shows a three-dimensional view of the structure of the pulverized coal distributor according to the embodiment of the present invention, which consists of a distributor inlet 1 (that is, the outlet of the coal mill separator), a powder falling pipe 2, a pulverized coal distribution chamber 3, and branch pipes 4~ 7 components, fully connected inside the distributor. figure 2 yes figure 1 Corresponding main view.

[0032] image 3 is the schematic diagram of the pulverized coal distributor and the jet nozzle, which is in figure 1 Add jet nozzles 8 to 15 on the basis of , and the nozzles 8 to 15 are arranged symmetrically about the central axis of the powder falling pipe 2 in the center of the distributor. The axis centers of the nozzles 8 to 15 pass through the centers of the adjacent branch pipes 4 to 7 respectively. ) is taken as 1 / 4 of the diameter of the branch pipe. Figure 4 The plane layout of eight jet nozzles is shown, and the directions of the je...

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Abstract

The invention discloses an online adjusting system for jet-stream distribution of pulverized coal, comprising: a pulverized coal distributor distributing pulverized coal at an outlet of a splitter ofa coal pulverizer into branch pipes connected in parallel; a pulverized coal concentration online-measuring device performing real-time online measurement of pulverized coal concentration in the branch pipes; a stream-jetting device including a jet nozzle and a pneumatic pump, the stream-jetting device jetting high-speed stream into the pulverized coal distributor from the jet nozzle according toan online measurement of pulverized coal concentration in the branch pipes, and thereby improves pulverized coal distribution in the branch pipes, and improves a phenomenon of uneven distribution of pulverized coal among burners in the same layer.

Description

technical field [0001] The invention belongs to the technical field of power station boiler combustion optimization adjustment, and in particular relates to a jet-type pulverized coal distribution online adjustment system. Background technique [0002] The pulverized coal distributor is one of the key equipments of the power plant boiler pulverization system. It can provide a relatively uniform flow of pulverized coal to the burners corresponding to the coal pulverizers on the same layer, so as to ensure that the power of each burner is equal and the ignition conditions are similar, avoiding internal combustion in the furnace. Slagging, heating surface tube explosion and even furnace fire extinguishing can improve the deviation of flue gas flow on both sides of the furnace outlet and the large deviation of reducing atmosphere caused by oxygen-deficient combustion in local areas in the furnace, and significantly reduce the emission of harmful gases such as NOX. [0003] The e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/00F23K3/02
CPCF23K3/02F23N1/007
Inventor 朱曙光王硕
Owner NANJING UNIV OF SCI & TECH
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