CN104696958B - Pilot flame system of heat accumulation type combustion system and heat accumulation type combustion system and switching method - Google Patents

Pilot flame system of heat accumulation type combustion system and heat accumulation type combustion system and switching method Download PDF

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Publication number
CN104696958B
CN104696958B CN201510092880.4A CN201510092880A CN104696958B CN 104696958 B CN104696958 B CN 104696958B CN 201510092880 A CN201510092880 A CN 201510092880A CN 104696958 B CN104696958 B CN 104696958B
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CN
China
Prior art keywords
heat
combustion air
combustion
burner
storage type
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN201510092880.4A
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Chinese (zh)
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CN104696958A (en
Inventor
刘维
陈莲瑛
曾铁平
屈江江
楚红伟
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Changsha Hengwei Heat Energy Science & Technology Co Ltd
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Changsha Hengwei Heat Energy Science & Technology Co Ltd
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Priority to CN201510092880.4A priority Critical patent/CN104696958B/en
Publication of CN104696958A publication Critical patent/CN104696958A/en
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Publication of CN104696958B publication Critical patent/CN104696958B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23QIGNITION; EXTINGUISHING-DEVICES
    • F23Q13/00Igniters not otherwise provided for
    • F23Q13/02Igniters not otherwise provided for using gas burners, e.g. gas pokers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2206/00Burners for specific applications

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

Abstract

The invention discloses a pilot flame system of a heat accumulation type combustion system and the heat accumulation type combustion system and a switching method. The pilot flame system comprises two pilot flame burner bodies matched with heat accumulation type combustors in pair, wherein each pilot flame burner body is communicated with a corresponding heat accumulation type combustor through an independent air supply tube; the two air supply tubes are communicated through a serial connection tube; each pilot flame burner body comprises an inner tube, an outer tube sleeving the inner tube, and an ignition device; a one-way valve is mounted on each air supply tube. The switching method comprises the following steps: when the first heat accumulation type combustor is in a combustion state, keeping a first one-way valve matched with the first heat accumulation type combustor being in an opened state, keeping the second heat accumulation type combustor being in a smoke discharge state, and keeping a second one-way valve matched with the second heat accumulation type combustor being in a closed state. The pilot flame system has the characteristics of being simple in structure, good in energy saving effect, stable to work, simple and convenient to mount and repair, and the like.

Description

The ever-burning flame system of a kind of regenerative combustion system and regenerative combustion system, switching Method
Technical field
The present invention relates to field of combustion equipment, the ever-burning flame system of a kind of regenerative combustion system and heat accumulating type combustion Burning system, changing method.
Background technology
Along with energy demand is grown with each passing day by the increasingly serious and socioeconomic development of energy crisis, power-saving technology and The research and development of equipment become inexorable trend.In China, industrial furnace is energy consumption rich and influential family, accounts for the 25% of whole nation total energy consumption, and energy profit The most relatively low by rate, about 20%, its energy-saving potential is bigger.It is bigger that heat-storage type burner is applied to having of industrial furnace just The burner of energy-saving effect, its operation principle is by burning and smoke evacuation the toggling of state, and utilizes fume afterheat to preheat Combustion air: during smoke evacuation, high-temperature flue gas is through heat storage, by heat storage in the middle of heat storage;During burning, combustion air passes through By the heat storage of flue gas, temperature raises.In order to keep the seriality of technique, heat-storage type burner is typically all paired cloth Put.
Igniting will be re-started when each heat-storage type burner is switched to fired state by the state of smoke evacuation, but, burning Contrary by the airflow direction of heat storage with smoke evacuation state, during state switching, in burner hearth, fluctuate relatively in flow field near burner outlet Greatly, common electric spark igniter is difficult to effectively light a fire it.The ever-burning flame point that the most a lot of heat-storage type burners use Fire mode can guarantee that the effectiveness of igniting, owing to the seriality of flame kept burning day and night requires and the lance of main fire combustion air discontinuity supply Shield, the combustion air of ever-burning flame system is generally continuous print normal temperature air, separate with main fire combustion air.But, kept burning day and night The combustion-supporting air quantity of fire system can reach the 50% of main fire combustion-supporting air quantity, and this partial air cannot utilize fume afterheat, does not reaches Energy-saving effect.
Summary of the invention
In order to, on the premise of guaranteeing igniting effectively, make the combustion air of regenerative combustion system ever-burning flame system to utilize Fume afterheat, improves the energy-saving effect of whole regenerative combustion system, and need not do heat-storage type burner and application stove Go out bigger change, it is desirable to provide one can utilize, fume afterheat, energy-saving effect be notable, simple in construction, use and maintenance side The ever-burning flame system of regenerative combustion system just.
To achieve these goals, the technical solution adopted in the present invention is:
The ever-burning flame system of a kind of regenerative combustion system, it is structurally characterized in that, fires including with heat accumulating type arranged in pairs Two ever-burning flame burner bodies that burner is supporting;Each ever-burning flame burner body supplies airduct and corresponding heat accumulating type by independent Burner connects, and two are connected by tandem tube between airduct;Each described ever-burning flame burner body all include inner tube and Suit outer tube on inner pipe, and igniter;Said inner tube is the blast tube connected with burner hearth or combustion air passage, institute State and between inner tube with outer tube, form corresponding combustion air passage or blast tube;Equipped with check valve on described confession airduct.
Form corresponding combustion air passage between said inner tube with outer tube or blast tube refers to: when inner tube is blast tube Time, then form combustion air passage between inner tube and outer tube;When inner tube is combustion air passage, then form combustion between inner tube and outer tube Gas passage.
It is below to further improved technical scheme of the present invention:
Further, described outer tube having combustion air channel entrance, this combustion air channel entrance is arranged on the one of outer tube End, the other end of this outer tube has the combustion air channel outlet connected with burner hearth;Described blast tube by burner hearth one end equipped with Gas nozzle.
Described igniter is ignitor, and this ignitor is penetratingly arranged on described combustion air passage, and ignition power Described combustion air passage is stretched out in one end of pole, and the other end of this ignitor is fixed near described gas nozzle.
Fire inspection probe it is provided with along its length in described combustion air passage;One end of described fire inspection probe is stretched out described Combustion air passage, the other end of this fire inspection probe stretches in burner hearth, and is fixed on described combustion air channel exit.
It is perpendicular to its length direction in described combustion air passage and combustion air deflector is installed.
Described gas nozzle has a center nozzle and multiple subjet of centrally disposed spout surrounding;Described combustion Gas jets is positioned at described combustion air channel exit.
Described center nozzle is coaxially disposed with inner tube, and the axis of described subjet and inner tube are axially in 45 °.
Based on same inventive concept, present invention also offers a kind of regenerative combustion system, it includes burner hearth, sets in pairs Put the heat-storage type burner in burner hearth;Described heat-storage type burner is provided with the heat storage type combustion as above being attached thereto The ever-burning flame system of system.
Based on same inventive concept, present invention also offers the fire row of a kind of regenerative combustion system as above Cigarette changing method, its feature is, in two heat-storage type burners, when the first heat-storage type burner is fired state, with Supporting the first check valve of one heat-storage type burner remains on, and the second heat-storage type burner is smoke evacuation state, with second Supporting the second check valve of heat-storage type burner remains off;When the second heat-storage type burner is fired state, with Supporting the second check valve of two heat-storage type burners is held open state, and the first heat-storage type burner is smoke evacuation state, with first Supporting the first check valve of heat-storage type burner remains off.
The switching of the three-way diverter valve opening and closing conversion and heat-storage type burner of described check valve synchronizes.
Thus, heat-storage type burner arranged in pairs is alternately in burning and the shape of smoke evacuation by the commutation of three-way diverter valve State, the conversion of two three-way diverter valves and two keying conversion synchronization for the check valve on airduct: the first heat-storage type burner 1 When being in fired state, high pressure check valve ever-burning flame burner on supporting with it is in opening, meanwhile, and the second heat accumulating type Burner 1 is in smoke evacuation state, and high pressure check valve ever-burning flame burner on supporting with it is closed;Now, combustion-supporting Gas raises through the heat storage of the first heat-storage type burner 1, temperature, and major part is by main fire combustion-supporting gas passage support master The burning of fire, remainder enters two ever-burning flame burners by supply airduct and the tandem tube of the ever-burning flame system supporting with it Combustion air passage, supports the burning of two ever-burning flame burners, and flue gas is through the heat storage of the second heat-storage type burner 1, by heat It is stored in heat storage.After two three-way diverter valves of heat-storage type burner carry out linkage commutation, the first heat-storage type burner 1 Being converted to smoke evacuation state, the check valve of the ever-burning flame system supporting with it transfers closed mode to, the second heat-storage type burner 1 turn Being changed to fired state, the check valve of the ever-burning flame system supporting with it transfers opening to.By above-mentioned changing method, it is possible to Being two ever-burning flame burner supply combustion airs constantly, i.e. two ever-burning flame burners are in lasting fired state, and combustion-supporting Gas is the high-temperature gas through heat storage heating, make use of fume afterheat, has reached energy-saving effect.
Compared with prior art, the invention has the beneficial effects as follows: the combustion air of this ever-burning flame system is through being added by flue gas After the heat storage of heat, temperature raises, and has indirectly reclaimed fume afterheat, has reached significant energy-saving effect;Combustion-supporting sky after intensification Gas can make ever-burning flame fuel combustion more fully, combustion flame more stable;This ever-burning flame system structure is simple, easy for installation, it is not necessary to Stove and heat-storage type burner make bigger change and reliable.
Below in conjunction with the drawings and specific embodiments, technical scheme is described in detail.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of one embodiment of the invention;
Fig. 2 is the ever-burning flame nozzle structure figure of one embodiment of the invention;
Fig. 3 is the nozzle cross-section figure of one embodiment of the invention.
In the drawings:
1,1-heat-storage type burner;2,2-ever-burning flame burner body;3,3-ever-burning flame is for airduct;4,4-tandem tube; 5-blast tube;6-combustion air passage;7-combustion air channel entrance;8-ignitor;9-fire inspection probe;10-combustion air water conservancy diversion Plate;11-mounting flange;12,12-regenerator;13,13-high pressure check valve;14,14-flange;15-blast tube import; 16-gas nozzle;17-combustion air channel outlet;18-center nozzle;19-subjet;20,20 '-three-way diverter valve; 21,21 '-main fire combustion-supporting gas passage.
Detailed description of the invention
The ever-burning flame system of a kind of regenerative combustion system, as it is shown in figure 1, include and heat-storage type burner arranged in pairs Supporting two ever-burning flame burner bodies, ever-burning flame supply airduct, tandem tube.Ever-burning flame is entered by combustion air passage for airduct one end Mouth connects with ever-burning flame burner body, and the other end connects with the regenerator of heat-storage type burner.Tandem tube one end vertically with length Naked light connects for airduct, and the other end is connected with another ever-burning flame burner body arranged in pairs by flange.
The structure of ever-burning flame burner body, as in figure 2 it is shown, include: inner tube, for blast tube, its one end is blast tube Import, the other end is the gas nozzle that combustion gas enters burner hearth;Outer tube, fills on inner pipe coaxially, for combustion-supporting gas passage, one end For the combustion air channel entrance of perpendicular connection, the other end is the combustion air channel outlet entering burner hearth;Ignitor, runs through Be arranged in described combustion air passage, one end outside combustion air passage end, the other end near described gas nozzle, use In ever-burning flame burner is lighted a fire;Fire inspection probe, one end is outside combustion air passage end, and the other end stretches into burner hearth, described Combustion air channel exit, for detecting the flame of ever-burning flame burner, once fray-out of flame, then can be by corresponding automatic control system System cuts off gas supply;Combustion air deflector, in being vertically installed at described combustion air passage at close gas nozzle, is used for The rectification of combustion-supporting gas, makes air distribution evenly;Mounting flange, is arranged at described combustion air channel entrance, for by kept burning day and night Fire burner body is fixed on furnace wall.
Fig. 3 is gas nozzle sectional view, including a center nozzle coaxial with inner tube and at 45 ° with inner tube axis Multiple subjet at angle, and nozzle is positioned at combustion air channel exit.
The ever-burning flame system combustion air changing method of a kind of regenerative combustion system as above, works as heat storage type combustion During system work, heat-storage type burner arranged in pairs is alternately in burning and the shape of smoke evacuation by the switching of three-way diverter valve State.When first heat-storage type burner 1 is in fired state, high pressure check valve ever-burning flame burner on supporting with it is in unlatching State, meanwhile, the second heat-storage type burner 1 is in smoke evacuation state, at the high pressure check valve on ever-burning flame burner supporting with it In closed mode.Now, combustion-supporting gas is after the heat storage of the first heat-storage type burner 1, and temperature raises, and major part is passed through Main fire combustion-supporting gas passage supports the burning of main fire, remainder by with its supporting ever-burning flame system for airduct and connecting Pipe enters the combustion air passage of two ever-burning flame burners, supports the burning of two ever-burning flame burners.When heat-storage type burner two After individual three-way diverter valve carries out linkage commutation, the first heat-storage type burner 1 is converted to smoke evacuation state, the combustion product gases warp in burner hearth Crossing the first heat-storage type burner 1, discharge after heat storage body, the second heat-storage type burner 1 is converted to fired state, with first Heat-storage type burner 1 and the high pressure check valve of the supporting respective ever-burning flame burner of the second heat-storage type burner 1 and triplet commutation Valve links, i.e. the high pressure check valve of the first heat-storage type burner 1 transfers closed mode to, the second heat-storage type burner 1 High pressure check valve transfers opening to.
In above-mentioned work process, two ever-burning flame burners can receive combustion air, i.e. two baked wheaten cakes kept burning day and night continuously Mouth is at lasting fired state, and combustion-supporting gas is the high-temperature gas through heat storage heating, make use of fume afterheat, Reach energy-saving effect.The multi-port inclination angle of fuel nozzle, nozzle are positioned at the designs such as outer tube makes the mixing of fuel and gas more Fully, burning is more effectively.It addition, this ever-burning flame system structure is simple, easy for installation, it is not necessary to stove or heat-storage type burner Make bigger change.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not For limiting the scope of the present invention, after having read the present invention, the those skilled in the art's various equivalent form of values to the present invention Amendment each fall within the application claims limited range.

Claims (13)

1. the ever-burning flame system of a regenerative combustion system, it is characterised in that include and heat-storage type burner arranged in pairs (1,1) two supporting ever-burning flame burner bodies (2,2);Each ever-burning flame burner body (2,2) supplies airduct by independent (3,3) connect with corresponding heat-storage type burner (1,1), and two for connecting by tandem tube (4,4) between airduct (3,3) Logical;Each described ever-burning flame burner body (2,2) all includes inner tube and suit outer tube on inner pipe, and igniter; Said inner tube is the blast tube (5) or combustion air passage (6) connected with burner hearth, is formed corresponding between said inner tube with outer tube Combustion air passage (6) or blast tube (5);Equipped with check valve (13,13) on described confession airduct (3,3);
Having combustion air channel entrance (7) on described outer tube, this combustion air channel entrance (7) is arranged on one end of outer tube, and this is outer The other end of pipe has the combustion air channel outlet (17) connected with burner hearth;Described blast tube (5) by burner hearth one end equipped with Gas nozzle (16);
Described igniter is ignitor (8), and this ignitor (8) is penetratingly arranged on described combustion air passage (6), and point Described combustion air passage (6) is stretched out in one end of thermoelectricity pole (8), and the other end of this ignitor (8) is fixed on described gas nozzle (16) near;
Fire inspection probe (9) it is provided with along its length in described combustion air passage (6);One end of described fire inspection probe (9) is stretched Going out described combustion air passage (6), the other end of this fire inspection probe (9) stretches in burner hearth, and is fixed on described combustion air passage and goes out Mouth (17) place.
The ever-burning flame system of regenerative combustion system the most according to claim 1, it is characterised in that described combustion air passage (6) it is perpendicular to its length direction in and combustion air deflector (10) is installed.
The ever-burning flame system of regenerative combustion system the most according to claim 1, it is characterised in that described gas nozzle (16) there are multiple subjet (19) of a center nozzle (18) and centrally disposed spout (18) surrounding;Described gas injection Mouth (16) is positioned at described combustion air channel outlet (17) place.
The ever-burning flame system of regenerative combustion system the most according to claim 3, it is characterised in that described center nozzle (18) being coaxially disposed with inner tube, the axis of described subjet (19) and inner tube are axially in 45 °.
5. a regenerative combustion system, including burner hearth, the heat-storage type burner being arranged in pairs in outside burner hearth (1,1);Its feature Being, described heat-storage type burner (1,1) is provided with the heat storage type combustion as described in one of claim 1-4 being attached thereto The ever-burning flame system of system.
6. the ever-burning flame system combustion-supporting gas changing method of a regenerative combustion system, it is characterised in that described heat accumulating type fires Burning system includes burner hearth, the heat-storage type burner (1,1) being arranged in pairs in outside burner hearth;On described heat-storage type burner (1,1) It is provided with the ever-burning flame system of the regenerative combustion system being attached thereto;
The ever-burning flame system of described regenerative combustion system includes two supporting with heat-storage type burner arranged in pairs (1,1) Individual ever-burning flame burner body (2,2);Each ever-burning flame burner body (2,2) supplies airduct (3,3) with corresponding by independent Heat-storage type burner (1,1) connects, and two for connecting by tandem tube (4,4) between airduct (3,3);Each described length Open flame combustion nozzle body (2,2) all includes inner tube and suit outer tube on inner pipe, and igniter;Said inner tube is and stove The blast tube (5) of thorax connection or combustion air passage (6), form corresponding combustion air passage (6) between said inner tube with outer tube Or blast tube (5);Equipped with check valve (13,13) on described confession airduct (3,3);
In two heat-storage type burners, when the first heat-storage type burner (1) is fired state, with the first heat-storage type burner (1) supporting the first check valve (13) remains on, and the second heat-storage type burner (1) is smoke evacuation state, with the second accumulation of heat Supporting the second check valve (13) of formula burner (1) remains off;When the second heat-storage type burner (1) is burning shape During state, second check valve (13) supporting with the second heat-storage type burner (1) is held open state, the first heat-storage type burner (1) being smoke evacuation state, first check valve (13) supporting with the first heat-storage type burner (1) remains off.
Ever-burning flame system combustion-supporting gas changing method the most according to claim 6, it is characterised in that have on described outer tube Combustion air channel entrance (7), this combustion air channel entrance (7) is arranged on one end of outer tube, and the other end of this outer tube has and stove The combustion air channel outlet (17) of thorax connection;Described blast tube (5) leans on one end of burner hearth equipped with gas nozzle (16).
Ever-burning flame system combustion-supporting gas changing method the most according to claim 7, it is characterised in that described igniter is Ignitor (8), this ignitor (8) is penetratingly arranged on described combustion air passage (6), and one end of ignitor (8) is stretched Going out described combustion air passage (6), the other end of this ignitor (8) is fixed near described gas nozzle (16).
Ever-burning flame system combustion-supporting gas changing method the most according to claim 7, it is characterised in that described combustion air passage (6) fire inspection probe (9) it is provided with in along its length;Described combustion air passage is stretched out in one end of described fire inspection probe (9) (6), the other end of this fire inspection probe (9) stretches in burner hearth, and is fixed on described combustion air channel outlet (17) place.
Ever-burning flame system combustion-supporting gas changing method the most according to claim 7, it is characterised in that described combustion air leads to It is perpendicular to its length direction in road (6) and combustion air deflector (10) is installed.
11. ever-burning flame system combustion-supporting gas changing methods according to claim 7, it is characterised in that described gas nozzle (16) there are multiple subjet (19) of a center nozzle (18) and centrally disposed spout (18) surrounding;Described gas injection Mouth (16) is positioned at described combustion air channel outlet (17) place.
12. ever-burning flame system combustion-supporting gas changing methods according to claim 11, it is characterised in that described center nozzle (18) being coaxially disposed with inner tube, the axis of described subjet (19) and inner tube are axially in 45 °.
13. according to the ever-burning flame system combustion-supporting gas changing method one of claim 6-12 Suo Shu, it is characterised in that described list Switching to the three-way diverter valve (20,20 ') opening and closing conversion and heat-storage type burner of valve (13,13) synchronizes.
CN201510092880.4A 2015-03-02 2015-03-02 Pilot flame system of heat accumulation type combustion system and heat accumulation type combustion system and switching method Expired - Fee Related CN104696958B (en)

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CN110848724A (en) * 2019-11-20 2020-02-28 景德镇陶瓷大学 Three-channel heat accumulating type heat exchange device

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DE202005013405U1 (en) * 2004-08-30 2005-11-10 Vaillant Gmbh Injection burner, has burner rods arranged so that they can ignite others, and ignited by separate ignition electrodes
CN101280916A (en) * 2008-05-14 2008-10-08 天津市赛洋工业炉有限公司 Thermal storage type oxygen-enriched combusting method and device
CN101482266A (en) * 2009-01-09 2009-07-15 吴道洪 Low-calorific value gas double pre-heating heat accumulation type radiant tube
CN201412850Y (en) * 2009-03-24 2010-02-24 胡和平 Fuel gas nozzle and burner employing same
CN204494400U (en) * 2015-03-02 2015-07-22 长沙恒威热能科技有限公司 A kind of ever-burning flame system of regenerative combustion system and regenerative combustion system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005013405U1 (en) * 2004-08-30 2005-11-10 Vaillant Gmbh Injection burner, has burner rods arranged so that they can ignite others, and ignited by separate ignition electrodes
CN101280916A (en) * 2008-05-14 2008-10-08 天津市赛洋工业炉有限公司 Thermal storage type oxygen-enriched combusting method and device
CN101482266A (en) * 2009-01-09 2009-07-15 吴道洪 Low-calorific value gas double pre-heating heat accumulation type radiant tube
CN201412850Y (en) * 2009-03-24 2010-02-24 胡和平 Fuel gas nozzle and burner employing same
CN204494400U (en) * 2015-03-02 2015-07-22 长沙恒威热能科技有限公司 A kind of ever-burning flame system of regenerative combustion system and regenerative combustion system

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