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Title:
PULVERIZED COAL BURNER, METHOD FOR CONTROLLING PULVERIZED COAL BURNER AND BOILER
Document Type and Number:
Japanese Patent JP2018132208
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pulverized coal burner capable of easily suppressing or preventing outflow of a pulverized coal-air mixture into a secondary air supply passage, a method for controlling the pulverized coal burner and a boiler.SOLUTION: A pulverized coal burner includes: a pulverized coal pipe 16 in which a pulverized coal-air mixture of pulverized coal and primary air flows; a secondary air supply passage 25 that is provided outside the pulverized coal pipe 16 and in which secondary air flows; a burner nozzle 14 that has a partition plate 28 for separating a flow of the pulverized coal-air mixture and a flow of the secondary air and is installed on the flow direction downstream sides of the pulverized coal pipe 16 and the secondary air supply passage 25 so as to enable oscillation in the vertical direction; a joining section 30 provided by superposing a downstream end of the pulverized coal pipe 16 and an upstream end of the partition plate 28 on each other; and a straightening plate 31 installed on the upstream side of the joining section 30 in the secondary air supply passage 25 to change a flow direction of the secondary air flowing in the secondary air supply passage 25 toward the joining section 30.SELECTED DRAWING: Figure 2

Inventors:
山内 智博
岡元 章泰
松本 啓吾
菅 啓史
岩田 隆
田中 隆一郎
Application Number:
JP2017024127A
Publication Date:
August 23, 2018
Filing Date:
February 13, 2017
Export Citation:
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Assignee:
三菱日立パワーシステムズ株式会社
International Classes:
F23D1/00
Attorney, Agent or Firm:
藤田 考晴
三苫 貴織
川上 美紀
長田 大輔



 
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