JPH01129532U

JPH01129532U -

Info

Publication number: JPH01129532U
Application number: JP2111688U
Authority: JP
Priority date: 1988-02-22
Filing date: 1988-02-22
Publication date: 1989-09-04
Anticipated expiration: 2003-01-11
Also published as: JPH05658Y2

Description

[Brief explanation of drawings]

第１図は本考案の予混合低ＮＯｘガスバーナの
一例としてのラジアントウオールバーナがエチレ
ン分解炉壁に取り付けられたときの断面図、第２
図は第１図の要部左側面図、第３図は第１図の要
部断面図、第４図は第３図のＡ―Ａ矢視図である
。図中、１は予混合低ＮＯｘガスバーナであるラ
ジアントウオールバーナ、４はベンチユリーミキ
サ、６はバーナチツプ、７はエアーダクト、９は
一次空気流量調節手段、１１は二次空気流量調節
手段、４６は燃焼用空気、４７は一次空気、４８
は二次空気、５２は一次燃焼渦、５３は二次燃焼
ゾーン、５６は旋回羽根である。 Figure 1 is a cross-sectional view of a radiant wall burner as an example of the premixed low NOx gas burner of the present invention installed on the wall of an ethylene cracking furnace;
The figure is a left side view of the main part of FIG. 1, FIG. 3 is a sectional view of the main part of FIG. 1, and FIG. 4 is a view taken along the line A--A in FIG. 3. In the figure, 1 is a radiant wall burner which is a premixed low NOx gas burner, 4 is a ventilary mixer, 6 is a burner chip, 7 is an air duct, 9 is a primary air flow rate adjustment means, 11 is a secondary air flow rate adjustment means, and 46 is a Combustion air, 47 is primary air, 48
52 is a primary combustion vortex, 53 is a secondary combustion zone, and 56 is a swirl vane.

Claims

[Claims for Utility Model Registration] 1. Part of the air preheated by exhaust gas, etc. is premixed with fuel in a cylindrical ventilate mixer as primary air to form a primary combustion vortex, and the remainder of the air is In a premixed low NOx gas burner in which secondary air is passed through the outer periphery of the ventilary mixer and guided to the secondary combustion zone by a swirl vane provided near the downstream end of the burner tip, air is passed around the ventilary mixer and inside the ventilary mixer. and an air duct for guiding combustion air on the outer periphery, and primary air flow rate adjusting means for adjusting the flow rate of primary air introduced into the upstream end of the ventilary mixer, and A premixed low NOx gas burner characterized in that a secondary air flow rate adjusting means that is movable in the axial direction is provided on the outer periphery of the burner. 2. The primary air flow rate adjusting means has a primary air door that can move toward and away from the upstream end opening of the ventilary mixer, and a primary air adjustment handle for moving the primary air door, and A flow rate adjusting means moves in the axial direction of the ventilary mixer to narrow the flow path of the secondary air while maintaining airtightness with the inner wall of the air duct, and the secondary air door is moved. 2. The premixed low NOx gas burner of claim 1, further comprising a secondary air adjustment handle for controlling the secondary air, said burner tip having a secondary air swirl vane.