CN201512551U - Combustible gas explosion-suppressing device for flue - Google Patents
Combustible gas explosion-suppressing device for flue Download PDFInfo
- Publication number
- CN201512551U CN201512551U CN2009201967670U CN200920196767U CN201512551U CN 201512551 U CN201512551 U CN 201512551U CN 2009201967670 U CN2009201967670 U CN 2009201967670U CN 200920196767 U CN200920196767 U CN 200920196767U CN 201512551 U CN201512551 U CN 201512551U
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- gas
- flue
- fuel gas
- explosion
- fuel
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The utility model discloses a flue gas explosion-suppressing device for a steel converter, and particularly relates to a combustible gas explosion-suppressing device for a flue, comprising a movable gas hood and a gasifying cooling flue, wherein the gasifying cooling flue is arranged on a rotary furnace body by the movable gas hood. The combustible gas explosion-suppressing device is characterized in that a fuel gas supplemental firing system and a fuel gas burner nozzle; the fuel gas burner nozzle consists of an supplemental firing coal gas inlet, an ignition device and a combustion-supporting air inlet; the fuel gas supplemental firing system consists of a fuel gas inlet, a fuel gas pipeline and a control valve; and the fuel gas pipeline and the fuel gas inlet are connected with each other, and the control valve is arranged on the fuel gas pipeline. The combustible gas explosion-suppressing device can effectively suppress explosion in the process of coal gas recovery of the rotary furnace, stabilize the gas temperature, prolong the service life of the equipment and increase the yield of steam and coal gas.
Description
Technical field
The utility model relates to a kind of steel-making converter flue gas explosion suppression device, especially a kind of explosion suppression device of combustible gas for flues.
Background technology
Coal gas of converter is a kind of gaseous mixture that contains a large amount of carbon monoxide, is high quality gas fuel.In the smelting iron and steel industry,, adopt gas wet recovery system (OG method) or coal gas dry-method recovery technology (LT method) substantially at the recovery of coal gas of converter.
Because coal gas of converter is intermittent the generation, the flue-gas temperature big ups and downs, the composition of flue gas also changes according to the variation of converter smelting operating mode.In conventional converter gas treatment system, in Converter Oxigen Blowing mid-term, contain a large amount of carbon monoxide (content of 60%-80%) in the flue gas, contain oxygen hardly; During non-oxygen blast, the composition of flue gas more approaches the composition of air, and wherein the content of oxygen is bigger.When having local eddy currents or dead band in the smoke processing system, cause inflammable gas and oxygen mix easily, will be explosion caused when running into naked light, Mars or electrical spark, bring infringement and hidden danger to converter production and personal security.
At present, also there is not special explosion suppression device in the prior art.In the OG method, the datonation-inhibition measure of taking is to reduce flue-gas temperature fast with converter one-level Venturi meter and secondary Venturi meter water spray; In the LT method, be by the water smoke that spray cooling tower sprays into flue gas to be carried out instantaneous temperature reduction to reach datonation-inhibition purpose, fail in time to cool off as the Mars that carries in the flue gas, will be explosion caused.In the design of a smoke processing system of converter, also to avoid flue gas system that the dead band is arranged simultaneously as far as possible, blast in order to avoid flue gas mixes.
In addition, at present conventional LT method or OG method coal gas of converter treatment system, when the content of carbon monoxide in the flue gas be lower than 30% or oxygen content just be considered as defective coal gas when being higher than 2%, underproof coal gas enters and diffuses the tower discharging.The a large amount of carbon monoxide of this just inevitable waste also brings great environmental stress simultaneously.
Summary of the invention
Technical problem to be solved in the utility model provides a kind ofly can effectively suppress blast in the RECOVERY OF CONVERTER GAS process, stablize flue-gas temperature, prolong equipment life, the explosion suppression device of combustible gas for flues of increase steam and gas yield.
The technical scheme in the invention for solving the above technical problem is: this explosion suppression device comprises movable gas hood and gasification cooling flue, gasification cooling flue is installed on the converter body by movable gas hood, and its constructional feature is that combustion gas afterburning system and fuel burner nozzle are installed on gasification cooling flue.
Fuel burner nozzle described in the utility model is made up of afterburning gas entry, portfire and combustion air inlet.
Combustion gas afterburning described in the utility model system is made up of fuel gas inlet, gas pipeline and by-pass valve control, and gas pipeline is connected with fuel gas inlet, and by-pass valve control is installed on the gas pipeline.
The utility model compared with prior art, has following beneficial effect: installing combustion gas afterburning system and fuel burner nozzle in the flue of this device after steel-smelting converter movable smoke hood, the benefit of afterburning combustion gas is gone into amount and is regulated automatically as required, when not oxygen blast of converter, strengthen combustion gas and mend into amount, the process fuel burner nozzle is lighted the oxygen reaction in back and the flue gas, when Converter Oxigen Blowing, reduce combustion gas and mend, like this generation that just can suppress to explode by the amount of oxygen in the control flue gas into amount; This device also can be alleviated the rapid drawdown that rises sharply of flue-gas temperature simultaneously, help solving the problem of expanding with heat and contract with cold of the gasification cooling flue that the steel-making converter batch production causes and prolong work-ing life of flue, diffuse the carbon monoxide of phase simultaneously by burning, can increase steam production, improve utilization rate of waste heat, and prolong the coal-gas recovering phase, increase gas yield.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Referring to Fig. 1, present embodiment comprises movable gas hood 2, gasification cooling flue 5, combustion gas afterburning system 3 and fuel burner nozzle 4, gasification cooling flue 5 is installed on the converter body 1 by movable gas hood 2, and combustion gas afterburning system and fuel burner nozzle 4 are installed on gasification cooling flue 5.Fuel burner nozzle 4 is made up of afterburning gas entry 41, portfire 42 and combustion air inlet 43, and fuel burner nozzle 4 can be set several as required.Combustion gas afterburning system is made up of fuel gas inlet 3, gas pipeline and by-pass valve control, fuel gas inlet 3 can be set several as required, gas pipeline is connected with fuel gas inlet 3, and by-pass valve control is installed on the gas pipeline, and gas pipeline and by-pass valve control do not show in the drawings.
Used afterburning combustion gas is blast furnace gas, coal gas of converter, water-gas or Sweet natural gas etc.During Converter Oxigen Blowing, the flue gas in the gasification cooling flue 5 contains oxygen hardly, can close combustion gas afterburning system and fuel burner nozzle 4 during this period; During the non-oxygen blast of converter, the oxygen level of flue gas increases in the gasification cooling flue 5, open combustion gas afterburning system and fuel burner nozzle 4 this moment, the afterburning combustion gas enters gasification cooling flue 5 by gas pipeline from fuel gas inlet 3, the inlet of afterburning combustion gas is controlled by by-pass valve control, and the oxygen that the afterburning combustion gas is lighted in back and the flue with portfire 42 reacts; Simultaneously, combustion air 43 places that enter the mouth feed the combustion-supporting air of using, and afterburning gas entry 41 places also feed the afterburning combustion gas, its objective is in order to play ignition action better.
Because the condition of carbon monoxide and air mixed blast is:
1, mixes thing blast limit 12%～75% with air;
2, temperature reaches 608.89 ℃ of spontaneous ignition temperatures;
3, main combustiblecomponents is a carbon monoxide in the coal gas of converter, when the oxygen of sneaking into 2% in the coal gas, meets naked light and then produces blast.
Therefore the utility model is effectively controlled the blast of coal gas of converter by the oxygen content in the control converter gas.During the non-oxygen blast of converter and before and after the burning phase, by introducing excessive afterburning combustion gas, burn with oxygen in the flue gas, fundamentally suppress the generation of blast.
Claims (3)
1. explosion suppression device of combustible gas for flues, comprise movable gas hood (2) and gasification cooling flue (5), gasification cooling flue (5) is installed on the converter body (1) by movable gas hood (2), it is characterized in that: combustion gas afterburning system and fuel burner nozzle (4) are installed on gasification cooling flue (5).
2. explosion suppression device of combustible gas for flues according to claim 1 is characterized in that: described fuel burner nozzle (4) is made up of afterburning gas entry (41), portfire (42) and combustion air inlet (43).
3. explosion suppression device of combustible gas for flues according to claim 1, it is characterized in that: described combustion gas afterburning system is made up of fuel gas inlet (3), gas pipeline and by-pass valve control, gas pipeline is connected with fuel gas inlet (3), and by-pass valve control is installed on the gas pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201967670U CN201512551U (en) | 2009-09-17 | 2009-09-17 | Combustible gas explosion-suppressing device for flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201967670U CN201512551U (en) | 2009-09-17 | 2009-09-17 | Combustible gas explosion-suppressing device for flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201512551U true CN201512551U (en) | 2010-06-23 |
Family
ID=42483959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201967670U Expired - Lifetime CN201512551U (en) | 2009-09-17 | 2009-09-17 | Combustible gas explosion-suppressing device for flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201512551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876837A (en) * | 2012-09-18 | 2013-01-16 | 中冶南方工程技术有限公司 | Device and method for removing dust from converter gas by dry method |
| CN112280928A (en) * | 2020-10-12 | 2021-01-29 | 首钢京唐钢铁联合有限责任公司 | Purification method before starting converter vaporization cooling system pipeline |
-
2009
- 2009-09-17 CN CN2009201967670U patent/CN201512551U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876837A (en) * | 2012-09-18 | 2013-01-16 | 中冶南方工程技术有限公司 | Device and method for removing dust from converter gas by dry method |
| CN112280928A (en) * | 2020-10-12 | 2021-01-29 | 首钢京唐钢铁联合有限责任公司 | Purification method before starting converter vaporization cooling system pipeline |
| CN112280928B (en) * | 2020-10-12 | 2022-05-10 | 首钢京唐钢铁联合有限责任公司 | Purification method before starting converter vaporization cooling system pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100623 |
|
| CX01 | Expiry of patent term |