CN101063525A - Oxygen-enriched combustion radiant tube heaters - Google Patents

Oxygen-enriched combustion radiant tube heaters Download PDF

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Publication number
CN101063525A
CN101063525A CNA2007100650921A CN200710065092A CN101063525A CN 101063525 A CN101063525 A CN 101063525A CN A2007100650921 A CNA2007100650921 A CN A2007100650921A CN 200710065092 A CN200710065092 A CN 200710065092A CN 101063525 A CN101063525 A CN 101063525A
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CN
China
Prior art keywords
oxygen
radiant tube
gas
flue gas
combustion
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CNA2007100650921A
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Chinese (zh)
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CN100561047C (en
Inventor
温治
豆瑞锋
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Priority to CNB2007100650921A priority Critical patent/CN100561047C/en
Publication of CN101063525A publication Critical patent/CN101063525A/en
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Publication of CN100561047C publication Critical patent/CN100561047C/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

A radiant-tube heater of oxygen-enriched combustion belonging to the field of environmental protection relates to a new method of oxygen-enriched combustion technology applicable to radiant-tube heater, to develop a combustion system of novel industrial radiant tube that combusts the low-calorific value gas (or other fuel gas) to increase the heat utilization, which is characterized in that the heater comprises oxygen or oxygen-enriched air (1), fuel (2), mixed gas (3) of oxygen or oxygen-enriched air and smoke gas, fuel gas (4), smoke gas (5) in the radiant tube, smoke gas (6) discharged from the radiant tube, a smoke gas injector (7), a combustor (8), a boiler wall (9) and a radiant tube (10). The heater has low combusting temperature, low content of harmful gas like NOx in the smoke gas and high heat efficiency, and is good for collecting the smoke, in particular to CO2 and increases the stability and reliability of the system.

Description

A kind of oxygen-enriched combustion radiant tube heaters
Technical field
The invention belongs to the environmental protection field, relate to the new method that a kind of oxygen-enriched combustion technology is used on radiant tube heater, purpose is to develop a kind of infant industry radiant tube combustion system of utilizing oxygen enrichment technology lower heat of combustion coal gas (perhaps other fuel gas), improving heat utilization efficiency.
Background technology
At present, needs such as metal heat treatmet use the firing equipment of protective gas to use radiant heater more, and particularly the combustion type radiant tube uses in a large number in continuous strip annealing furnace.In order to improve the thermal efficiency of radiant tube, last century, the late nineteen eighties people developed heat accumulation type radiant tube, had improved the thermal efficiency greatly.But because heat storage needs periodic maintenance and replacing, and heat storage also has thermal efficiency problem in bearing the process of heat exchange, is not best for the recovery of fume afterheat.
Summary of the invention
The objective of the invention is to construct a kind of oxygen enrichment radiant tube heater, it can combusting low calorific value gas fuel or other fuel gas, and the high efficiente callback fume afterheat, thereby reaches the higher thermal efficiency, simultaneously can be to carbon dioxide (CO 2) carry out high efficiente callback, reduce carbon dioxide (CO effectively 2) the direct discharging of gas.
A kind of oxygen-enriched combustion radiant tube heaters is made up of flue gas 5 in the mist 3 of oxygen or oxygen-enriched air 1, fuel 2, oxygen or oxygen-enriched air and combustion product gases, burning gases 4, the radiant tube, flue gas 6, flue gas ejector 7, burner 8, furnace wall 9, the radiant tube 10 of discharging radiant tube.Radiant tube 10 is a welding integral, and all in radiant tube 10, radiant tube 10 is fixed to the outer wall of furnace wall 9 to flue gas 5 by flange in the mist 3 of oxygen or oxygen-enriched air and combustion product gases, burning gases 4, the radiant tube.Flue gas ejector 7, burner 8 are connected on the radiant tube 10 by welding or flange, and the diameter of flue gas ejector 7, burner 8 is less than the diameter of radiant tube 10.The gas that flue gas ejector sprays is normal temperature oxygen enrichment or total oxygen gas, oxygen or oxygen-enriched air 1 self-injection device spout spray at a high speed, rely on jet injection effect to mix with flue gas 5 in the radiant tube, become the lower combustion-supporting gas 3 of percentage composition of oxygen, the waste heat with flue gas directly is recovered in the combustion-supporting gas simultaneously.Combustion-supporting gas 3 is through deflector and fuel 2 mixed combustion in burner 8, high-temperature combustion gas 4 sprays in the radiant tube 10, along with combustion reaction become carbonated and the more flue gas 5 of water, flue gas 5 is discharged radiant tube by the part of injection and is not carried out the collection of waste heat recovery and carbon dioxide.
Beneficial effect
The first, native system has adopted the direct recirculating technique of flue gas, makes this system have the low characteristics of ignition temperature, makes the radiant tube material that uses at present can satisfy the temperature requirement of new system, and pernicious gas content such as NOx is low in the flue gas;
The second, owing to adopt oxygen enrichment (being total oxygen) technology, the main component of combustion product is H 2O, CO 2(ratio is decided on fuel), flue gas have higher radiation coefficient, help improving the heat exchange of radiant tube internal gas and radiation tube wall.
The 3rd, because radiant tube itself is a closed system, for the collection of flue gas CO particularly 2The collection advantageous particularly, satisfied people's requirement more and more higher to environmental requirement.
The 4th, flue gas directly recycles the temperature that improved combustion-supporting oxygen and the heat utilization efficiency of system, reduced the Local enrichment of oxygen, and the flue gas that emits can be used for other preheating or heating purposes.
The 5th, adopt the flue gas recirculating technique of injection principle not have moving component, improved the stability and the reliability of system.
Description of drawings
Fig. 1 is positioned at the outer side radiation tube system construction drawing of furnace wall for injector
Fig. 2 is positioned at the side radiation tube system construction drawing of furnace wall for injector
The specific embodiment
1. injector is positioned at the outer side radiation tube system architecture of furnace wall, is made up of flue gas 5 in the mist 3 of oxygen or oxygen-enriched air 1, fuel 2, oxygen or oxygen-enriched air and combustion product gases, burning gases 4, the radiant tube, flue gas 6, flue gas ejector 7, burner 8, furnace wall 9, the radiant tube 10 of discharging radiant tube.Injector is positioned at the outside of furnace wall, though easy for installation, environment there are certain radiation and heat convection, unfavorable to the stove external environment.
2. injector is positioned at the side radiation tube system architecture of furnace wall, is made up of flue gas 5 in the mist 3 of oxygen or oxygen-enriched air 1, fuel 2, oxygen or oxygen-enriched air and combustion product gases, burning gases 4, the radiant tube, flue gas 6, flue gas ejector 7, burner 8, furnace wall 9, the radiant tube 10 of discharging radiant tube.Injector is positioned at the inboard of furnace wall, and the heat that distributes in environment of injector will reduce greatly like this, and the influence of stove external environment is also reduced greatly, and is inconvenient but it is installed.

Claims (1)

1. oxygen-enriched combustion radiant tube heaters is characterized in that heater is made up of flue gas (5) in the mist (3) of oxygen or oxygen-enriched air (1), fuel (2), oxygen or oxygen-enriched air and combustion product gases, burning gases (4), the radiant tube, flue gas (6), flue gas ejector (7), burner (8), furnace wall (9), the radiant tube (10) of discharging radiant tube; Radiant tube (10) is a welding integral, and all in radiant tube (10), radiant tube (10) is fixed to the outer wall of furnace wall (9) to flue gas (5) by flange in the mist of oxygen or oxygen-enriched air and combustion product gases (3), burning gases (4), the radiant tube; Flue gas ejector (7), burner (8) are connected on the radiant tube (10) by welding or flange, and the diameter of flue gas ejector (7), burner (8) requires the diameter less than radiant tube (10); The gas that flue gas ejector sprays is normal temperature oxygen enrichment or total oxygen gas, oxygen or oxygen-enriched air (1) self-injection device spout sprays at a high speed, rely on jet injection effect to mix with flue gas (5) in the radiant tube, become combustion-supporting gas (3), the waste heat with flue gas directly is recovered in the combustion-supporting gas simultaneously; Combustion-supporting gas (3) is through deflector and fuel (2) mixed combustion in burner (8), high-temperature combustion gas (4) sprays in the radiant tube (10), along with combustion reaction become flue gas (5), flue gas (5) is discharged radiant tube by the part of injection and is not carried out the collection of waste heat recovery and carbon dioxide.
CNB2007100650921A 2007-04-03 2007-04-03 A kind of oxygen-enriched combustion radiant tube heaters Expired - Fee Related CN100561047C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100650921A CN100561047C (en) 2007-04-03 2007-04-03 A kind of oxygen-enriched combustion radiant tube heaters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100650921A CN100561047C (en) 2007-04-03 2007-04-03 A kind of oxygen-enriched combustion radiant tube heaters

Publications (2)

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CN101063525A true CN101063525A (en) 2007-10-31
CN100561047C CN100561047C (en) 2009-11-18

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102119298A (en) * 2008-08-13 2011-07-06 Ifp新能源公司 Oxycombustion chamber
CN102149971A (en) * 2008-09-10 2011-08-10 法孚斯坦因公司 Recuperator for a radiating tube burner
CN102410733A (en) * 2010-09-23 2012-04-11 辽宁科技大学 Energy-saving low-temperature circular heating furnace
CN102607051A (en) * 2012-03-05 2012-07-25 华中科技大学 Oxygen injector
CN102713484A (en) * 2009-10-13 2012-10-03 艾伯纳工业筑炉有限公司 Device for heat-treating sheet metal strips
CN103255271A (en) * 2013-05-21 2013-08-21 北京科技大学 Gas dual-cycle radiant tube heating device
CN102112809B (en) * 2008-07-04 2013-09-18 Ws热加工技术有限责任公司 Radiant heating arrangement in which distortions are compensated
CN103868066A (en) * 2014-03-20 2014-06-18 北京科技大学 Multi-stage combustion radiant tube heating device
CN104110694A (en) * 2014-07-10 2014-10-22 中国神华能源股份有限公司 Smoke conveying device and method for injecting oxygen-enriched gas into flue
CN105403040A (en) * 2015-11-19 2016-03-16 广东工业大学 Smoke recycling auxiliary burning type aluminum melting furnace
CN105486099A (en) * 2016-01-26 2016-04-13 佛山市科皓燃烧设备制造有限公司 Out-of-furnace flue gas backflow device applied to industrial furnace
CN107906513A (en) * 2017-11-22 2018-04-13 西安科技大学 A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow
CN108224424A (en) * 2016-12-14 2018-06-29 卡利欧玛股份公司 Radiation item heating system
CN109761273A (en) * 2019-01-29 2019-05-17 北京拓首能源科技股份有限公司 A kind of oxygen heating furnace
CN110160357A (en) * 2019-06-15 2019-08-23 黄冈市中瓷朗能窑炉有限公司 A kind of nitridation reaction continuous tunnel formula device
CN116793098A (en) * 2023-08-29 2023-09-22 山西华茂智能新材料有限公司 Waste heat recycling method for annealing process slow cooling section of spheroidal graphite cast tube

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102112809B (en) * 2008-07-04 2013-09-18 Ws热加工技术有限责任公司 Radiant heating arrangement in which distortions are compensated
CN102119298B (en) * 2008-08-13 2014-07-30 Ifp新能源公司 Oxycombustion chamber
CN102119298A (en) * 2008-08-13 2011-07-06 Ifp新能源公司 Oxycombustion chamber
CN102149971A (en) * 2008-09-10 2011-08-10 法孚斯坦因公司 Recuperator for a radiating tube burner
CN102149971B (en) * 2008-09-10 2013-07-10 法孚斯坦因公司 Recuperator for a radiating tube burner
CN102713484B (en) * 2009-10-13 2015-12-16 艾伯纳工业筑炉有限公司 For the equipment of heat-treating metal plate and belt
CN102713484A (en) * 2009-10-13 2012-10-03 艾伯纳工业筑炉有限公司 Device for heat-treating sheet metal strips
CN102410733A (en) * 2010-09-23 2012-04-11 辽宁科技大学 Energy-saving low-temperature circular heating furnace
CN102607051A (en) * 2012-03-05 2012-07-25 华中科技大学 Oxygen injector
CN103255271A (en) * 2013-05-21 2013-08-21 北京科技大学 Gas dual-cycle radiant tube heating device
CN103868066A (en) * 2014-03-20 2014-06-18 北京科技大学 Multi-stage combustion radiant tube heating device
CN104110694A (en) * 2014-07-10 2014-10-22 中国神华能源股份有限公司 Smoke conveying device and method for injecting oxygen-enriched gas into flue
CN105403040A (en) * 2015-11-19 2016-03-16 广东工业大学 Smoke recycling auxiliary burning type aluminum melting furnace
CN105403040B (en) * 2015-11-19 2019-04-05 广东工业大学 Flue gas recirculation auxiliary combustion formula aluminium melting furnace
CN105486099A (en) * 2016-01-26 2016-04-13 佛山市科皓燃烧设备制造有限公司 Out-of-furnace flue gas backflow device applied to industrial furnace
CN108224424A (en) * 2016-12-14 2018-06-29 卡利欧玛股份公司 Radiation item heating system
CN107906513A (en) * 2017-11-22 2018-04-13 西安科技大学 A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow
CN109761273A (en) * 2019-01-29 2019-05-17 北京拓首能源科技股份有限公司 A kind of oxygen heating furnace
CN110160357A (en) * 2019-06-15 2019-08-23 黄冈市中瓷朗能窑炉有限公司 A kind of nitridation reaction continuous tunnel formula device
CN116793098A (en) * 2023-08-29 2023-09-22 山西华茂智能新材料有限公司 Waste heat recycling method for annealing process slow cooling section of spheroidal graphite cast tube
CN116793098B (en) * 2023-08-29 2023-10-20 山西华茂智能新材料有限公司 Waste heat recycling method for annealing process slow cooling section of spheroidal graphite cast tube

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Granted publication date: 20091118

Termination date: 20120403