JPS60181517U

JPS60181517U - Pulverized coal combustion burner

Info

Publication number: JPS60181517U
Application number: JP6905284U
Authority: JP
Inventors: 彰馬場
Original assignee: バブコツク日立株式会社
Priority date: 1984-05-14
Filing date: 1984-05-14
Publication date: 1985-12-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はこの考案のボイラ用微粉炭燃焼低ＮＯｘバーナ
の一実施例を示す図、第２図は第１図に示すバーナ内の
空気の静圧の変動を示す図、第３図は第１図に示すバー
ナの出口付近の燃焼状況を示す図、第４図は第１図に示
すバーナの空気比の変動を示す図、第５図は第１図に示
すバーナと従来のバーナとの、空気比に対するＮＯｘの
発生率および微粉炭の燃焼率を比較して示す図、第６図
は従来のボイラ用微粉炭燃焼低ＮＯ８バーナの一実施例
を示す図、第７図は従来のボイラ用微粉炭燃焼低ＮＯｘ
バーナの他の実施例を示す図、第８図は第６図および第
７図に示すバーナの空気比とＮＯｘの発生率および微粉
炭の燃焼率との関係を示す図、第９図は第６図および第
７図に示すバーナ出口付近の燃焼状況を示す図、第１０
図は第６図および第７図に示すバーナによる燃焼時のボ
イラ燃焼室内の燃焼状況を示す図である。１・・・微粉炭供給管、２・・・ベンチュリ、３・・・
三次空気、４・・・二次空気、５・・・燃焼排ガス、６
・・・燃焼用空気、７・・・火炎面、９，９′・・・微
粉炭、１０・・・ボイラ水壁、１１・・・主バーナ、１
２・・・副バーナ、１３・・・ボイラ燃焼室、１４・・
・微粉炭噴射ノズル、１５・・・二次空気吹出口、１６
・・・三次空気吹出口、１７・・・旋回器、１８・・・
燃焼排ガス吹出口、１９〜２１・・・矢印、２２・・・
圧縮空気噴出管、２３・・・弁、２４・・・コントロー
ラ、１４′・・・微粉炭噴射ノズルの先端。Fig. 1 is a diagram showing an embodiment of the pulverized coal combustion low NOx burner for boilers of this invention, Fig. 2 is a diagram showing fluctuations in the static pressure of air inside the burner shown in Fig. 1, and Fig. Figure 1 shows the combustion situation near the outlet of the burner, Figure 4 shows the variation in the air ratio of the burner shown in Figure 1, and Figure 5 shows the difference between the burner shown in Figure 1 and a conventional burner. , a diagram showing a comparison of the NOx generation rate and the combustion rate of pulverized coal with respect to the air ratio, Figure 6 is a diagram showing an example of a conventional pulverized coal combustion low NO8 burner for a boiler, and Figure 7 is a diagram showing a conventional boiler combustion rate. Pulverized coal combustion low NOx
8 is a diagram showing the relationship between the air ratio of the burner shown in FIGS. 6 and 7, the generation rate of NOx, and the combustion rate of pulverized coal, and FIG. 9 is a diagram showing other embodiments of the burner. A diagram showing the combustion situation near the burner outlet shown in Figures 6 and 7, Figure 10
This figure is a diagram showing the combustion situation in the boiler combustion chamber during combustion by the burner shown in FIGS. 6 and 7. 1...Pulverized coal supply pipe, 2...Venturi, 3...
Tertiary air, 4... Secondary air, 5... Combustion exhaust gas, 6
... Combustion air, 7... Flame surface, 9,9'... Pulverized coal, 10... Boiler water wall, 11... Main burner, 1
2... Sub-burner, 13... Boiler combustion chamber, 14...
・Pulverized coal injection nozzle, 15...Secondary air outlet, 16
...Tertiary air outlet, 17...Swirl device, 18...
Combustion exhaust gas outlet, 19-21...arrow, 22...
Compressed air jet pipe, 23...valve, 24...controller, 14'...tip of pulverized coal injection nozzle.

Claims

[Scope of utility model registration request]

inserting a compressed air jet pipe coaxially with the central axis of a pulverized coal injection nozzle of a pulverized coal combustion burner, and positioning the jet port of the compressed air jet pipe upstream of the jet port of the pulverized coal jet nozzle;
A pulverized coal combustion burner characterized in that compressed air is jetted out periodically and in pulses from the jetting port of the compressed air jetting pipe.