CN108072274A - A kind of high-efficiency heat-accumulating tubular heater system - Google Patents

A kind of high-efficiency heat-accumulating tubular heater system Download PDF

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Publication number
CN108072274A
CN108072274A CN201610983077.4A CN201610983077A CN108072274A CN 108072274 A CN108072274 A CN 108072274A CN 201610983077 A CN201610983077 A CN 201610983077A CN 108072274 A CN108072274 A CN 108072274A
Authority
CN
China
Prior art keywords
regenerative chamber
air
heat
tubular heater
tail gas
Prior art date
Application number
CN201610983077.4A
Other languages
Chinese (zh)
Inventor
陈云斌
陈天
余建华
陈志勋
王宏成
Original Assignee
湖北鑫固久技术装备有限公司
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Application filed by 湖北鑫固久技术装备有限公司 filed Critical 湖北鑫固久技术装备有限公司
Priority to CN201610983077.4A priority Critical patent/CN108072274A/en
Publication of CN108072274A publication Critical patent/CN108072274A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00Furnaces of a kind not covered by any preceding group
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00Heating of air supplied for combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • F27D2017/007Systems for reclaiming waste heat including regenerators
    • Y02E20/348
    • Y02P10/265

Abstract

The invention discloses a kind of high-efficiency heat-accumulating tubular heater systems,It is related to tubular heater and energy-conserving and emission-cutting technology field,It is low for solving existing Thermal Efficiency of Pipe Heaters,Short life,The problems such as stability is bad and system investments are high,The present invention includes tubular type furnace body,Burner,Regenerative chamber,Four-way reversing valve,Air blower,Air-introduced machine,With the equipment such as air-valve and flame detector,Combustion air is periodically blasted left and right regenerative chamber by air blower respectively by room temperature,It exchanges heat respectively with corresponding regenerative chamber,Combustion air temperature is raised to 300 DEG C or more,Tail gas is respectively periodically through corresponding regenerative chamber,Temperature is progressively down to 130 DEG C or so and is discharged through air-introduced machine after exchanging heat with corresponding regenerative chamber,Air and tail gas are respectively in left and right Two-cuff Technique room periodical exchange,Realize the efficient stable of burning,Eliminate traditional convection section simultaneously,And exhaust gas temperature reduces the thermal efficiency and improves,The tube furnace comprehensive method of investment is made most to save with service life to extend.

Description

A kind of high-efficiency heat-accumulating tubular heater system

Technical field

The invention discloses a kind of high-efficiency heat-accumulating tubular heater systems, are related to tubular heater and energy-conserving and emission-cutting technology Field specifically discloses a kind of two-way double loop heat-storage tubular heating furnace of efficient stable.

Background technology

Tubular heater is widely used process heating furnace, quilt during petroleum refining, petrochemical industry and coal chemical industry etc. are industrial It is gas or liquid that substance, which is heated, in Bottomhole pressure medium, and is all inflammable and explosive substance, and operating condition is harsh, same to duration Period run hitless operation, mode of heating is directly by fire.The exhaust gas temperature of tubular heater can be reduced to 100 DEG C or so, in fact The partial condensation of the steam containing sour water in existing flue gas, and while recovered flue gas low temperature sensible heat, it can recovery section steam containing sour water The latent heat of vaporization, further improve thermal efficiency of heating furnace, it is energy saving.

Document in the prior art on tubular heater is more, such as the disclosure of the invention of application number 201520869189.8 A kind of efficient tube type equiflux heater, including tubular type furnace body, which is characterized in that combustion chamber is equipped in the tube furnace body And heat-exchanging chamber, one end of the tubular type furnace body are the entry of combustion chamber with combustion chamber, the other end of tubular type furnace body be with The smoke outlet of combustion chamber is equipped with heated medium outlet, close to smoke outlet on the tubular type furnace body close to entry of combustion chamber Tubular type furnace body be equipped with heated medium entrance;The heat-exchanging chamber and the homogeneous interconnection of heated medium entrance and heated medium outlet It is logical;The combustion chamber includes combustion chamber exterior combustion chamber and inner combustion chamber, and the exterior combustion chamber is set on the inner wall of tubular type furnace body, The inner combustion chamber and the bottom of exterior combustion chamber are interconnected, and top and the smoke outlet of the inner combustion chamber and exterior combustion chamber connect It is logical;The heat-exchanging chamber being heated for medium is formed between the inner combustion chamber and exterior combustion chamber;On the inner wall of the exterior combustion chamber Equipped with the first spiral deflector, the outer wall of the inner combustion chamber is equipped with opposite with the first spiral deflector hand of spiral second Spiral deflector.

The patent of invention of Application No. 201110459125.7 discloses a kind of waste heat recovery system of pipe heater, including Air blower, front preheating process device and air preheater, front preheating process device are arranged at entrance or the exit of air blower, front preheating process The outlet of device and the import of air preheater connect, and cold air is after air blower, into front preheating process device, through preposition preheater It is discharged after heating, finally enters air preheater;Front preheating process device is finned tube exchanger or tube bundle heat exchanger;Front preheating process Heat source in device is hot water or steam.

However, although existing tubular heater increases some front preheating process device, heat exchanges in waste heat from tail gas use aspects Device is provided with flow-disturbing Heat Room, heat-exchanging chamber between combustion chamber and Heat Room, but is indirect heat exchange, heat exchange area by Limit, the easy fouling of pipeline, heat utilization rate is not high, and heat-storage tubular heating furnace absorbs waste heat from tail gas to directly heat using regenerative chamber Combustion air directly heats, and uses two-way double loop regenerative chamber, and flameholding, heat utilization rate is higher, specific load tubular type Stove floor space is small, and the comprehensive method of investment is low, and service life is long.

The content of the invention

The present invention improves tubular heater heat utilization rate to greatest extent in the case where ensureing flameholding, and carries For a kind of high-efficiency heat-accumulating tubular heater, waste heat from tail gas can be become direct heat transfer from indirect heat exchange, by heat exchanger tube or changed Hot cell is changed to regenerative chamber, and using two-way double loop regenerative chamber, combustion air and tail gas week are realized in regenerative chamber by control system Phase property exchanges heat, and makes full use of waste heat from tail gas.

In order to solve the above technical problems, the present invention adopts the technical scheme that:

A kind of high-efficiency heat-accumulating tubular heater system include tubular type furnace body, burner, regenerative chamber, four-way reversing valve, air blower, Air-introduced machine, with the equipment such as air-valve and flame detector, it is characterised in that the tubular heater system burning need combustion air It is exchanged respectively in two-way double loop regenerative chamber periodically with the tail gas of generation and realizes heat exchange, the i.e. left side and the right both direction, Each direction is respectively double loop regenerative chamber, realizes and individually exchanges;Left side combustion air is periodically roused respectively by air blower Enter one regenerative chamber after tail gas exchanges heat in the left side, the temperature of combustion air is made to rise to 300 DEG C or more by room temperature, left side tail gas leads to The air-introduced machine regenerative chamber that periodically another cools down through combustion air from the left side is crossed, exhaust temperature is progressively down to 130 DEG C or so rows Go out;The right combustion air periodically blasts one regenerative chamber after tail gas exchanges heat in the right by air blower respectively, makes combustion-supporting sky The temperature of gas rises to 300 DEG C or more by room temperature, and by air-introduced machine, periodically from the right, another is dropped through combustion air the right tail gas The regenerative chamber of temperature, exhaust temperature are progressively down to 130 DEG C or so discharges;The tubular heater combustion air and tail gas pass through respectively The right and left regenerative chamber passes through some cycles switch operation, and iterative cycles, reach energy-saving effect in cycles;Coal gas does not carry out It exchanges, and combustion air and tail gas stagger in the right and left regenerative chamber swap time, stablize combustion system;Burner is using diffusion Combustion system, empty, coal gas spray into burner hearth, can avoid being tempered respectively, increase burning adjustable range, are carried using empty, Gas Flow speed difference High space gas mixing velocity ensures combustion completion;Remote control is by process sequence automatic start or stops relevant device;It sets Associated safety interlocks, it is ensured that the operational safety of tubular heater system.

Sexual intercourse performance period in the right and left regenerative chamber is changed and commutated by four-way respectively for the combustion air and tail gas Valve by the procedure auto-control of setting, that is, controls the time interval of the good periodical exchange of procedure auto-control and each valve to open The sequencing of pass.

The combustion air and tail gas stagger in the right and left regenerative chamber swap time, i.e., the right and left regenerative chamber is distinguished more Combustion air and tail gas are changed into the time difference of out position, the fluctuation of combustion system is reduced, while when breaking down, does not influence another The operation on one side.

The coal gas does not exchange, i.e., coal gas is not by regenerative chamber, but directly makes flameholding into burner.

For the regenerative chamber using the strong mullite ceramic regenerative chamber of heat storage capacity, tail gas and combustion air are directly entered accumulation of heat Chamber interior is contacted directly with regenerative chamber, and regenerative chamber, regenerative chamber are mainly transferred heat to by way of heat transfer and heat radiation Combustion air is imparted heat to again, because regenerative chamber is equipped with anti-blocking pass, the anti-blocking and easy to clean of energy, equipped with anti-blocking layer and anti-adhesion Coating.

The burner of the heat-storage tubular heating furnace, using diffusion combustion mode, empty, coal gas sprays into burner hearth, can keep away respectively Exempt to be tempered, increase burning adjustable range;Using high gas speed and low air flow speed design, so improved using current difference empty Coal gas mixing velocity ensures combustion completion.

The remote controls such as the air blower, air-introduced machine, four-way reversing valve and flame detector monitor and by process sequence elder generations Automatic start or stopping afterwards making combustion air and tail gas periodically commutate in left and right regenerative chamber, additionally by control programme-control The relevant parameters such as temperature, flow and the pressure of adjusting control tubular heater.

The heat-storage tubular heating furnace sets big fire and small fire flame sensing signal monitoring flame conditions, is pacified by correlation Full interlock, it is ensured that the operational safety of system.

The conventional tubular stove and the changeable use of high-efficiency heat-accumulating tubular heater, even if regenerative chamber breaks down, Furnace body can also be produced normally in itself.

Compared with prior art, the present invention has following advantageous effect:

The commutation of high-efficiency heat-accumulating tubular heater is efficient, and regenerative heat exchange ability is strong, can greatly improve energy utilization rate, heat exchange Tail gas exhaust temperature is 250 DEG C to 300 DEG C lower than conventional tubular furnace exhaust gas temperature afterwards, 120 DEG C lower than metal heat-exchange furnace exhaust gas temperature To 200 DEG C.

Regenerative chamber service life is long, at low cost, regenerative chamber be not present aoxidize, fouling reduces asking for heat exchange efficiency reduction Topic, metallic recuperator are generally just present with the above problem after using 3 months, just do not have effect substantially after 3 years.

High-efficiency heat-accumulating tubular heater reduces convection section, conductive sections, while also reduces air heat exchanger, steam vapour Change device and the facilities such as corresponding piping, automatically controlled, under similary load condition, energy saving to reach more than 30%, system investments reduce 30%。

High-efficiency heat-accumulating tubular heater flameholding, regenerative chamber is passed through in two-way double loop in exchange process, and coal gas is not Switching, and once while breaking down will not influence to produce.

High-efficiency heat-accumulating tubular heater automatization level is high, by programme-control, realizes automatic exchange and relevant parameter Automatic adjustment, securely and reliably.

Description of the drawings

Fig. 1 is the relevant workflow schematic diagram of invention.

It is marked in figure:1- tubular type furnace bodies, 2- chimneys, 3- high-temperature four-way reversal valves, 4- regenerative chambers, 5- burners, 6- small fires Detector, the big Fike detectors of 7-, 8- low temperature four-way reversing valves, 9- enter with air-valve, 10- air-introduced machines, 11- air blowers, 12- coal gas Mouthful.

Specific embodiment

The technical solution in the present invention is described further with reference to the accompanying drawings and embodiments.

With reference to attached drawing, a kind of high-efficiency heat-accumulating tubular heater system of the present invention, including 1- tubular type furnace bodies, 2- chimneys, 3- high-temperature four-way reversal valves, 4- regenerative chambers, 5- burners, the small Fike detectors of 6-, the big Fike detectors of 7-, 8- low temperature four-way reversing valves, 9- matches somebody with somebody air-valve, 10- air-introduced machines, 11- air blowers, 12- gas entries;The burning of tubular heater system passes through coal gas and combustion air The mixed combustion at burner 5, heated medium heating, tail gas of generation in tubular type furnace body 1 pass through high-temperature four-way by chimney 2 Reversal valve 3 is discharged through regenerative chamber 4 and low temperature four-way reversing valve 8 through air-introduced machine 11, and combustion air is by air blower 11 through low temperature four Logical reversal valve 8 arrives regenerative chamber 4 through high-temperature four-way reversal valve 3 into burner 5, and coal gas directly enters burner by gas entry 12, with Air mixing after-combustion;Combustion air and the tail gas generated pass through high-temperature four-way reversal valve in two-way double loop regenerative chamber respectively 3 and low temperature four-way reversing valve 8 change realization heat exchange through control system controlling cycle sexual intercourse, i.e. the left side and the right both direction, each Direction is respectively double loop regenerative chamber, realizes and individually exchanges;Left side combustion air is periodically blasted respectively by air blower 11 One regenerative chamber after tail gas exchanges heat in the left side makes the temperature of combustion air rise to 300 DEG C or more by room temperature, and left side tail gas passes through The regenerative chamber that periodically another cools down through combustion air from the left side of air-introduced machine 10, exhaust temperature are progressively down to 130 DEG C or so rows Go out;The right combustion air does not blast one regenerative chamber after tail gas exchanges heat in the right not periodically by air blower point 11, makes combustion-supporting The temperature of air rises to 300 DEG C or more by room temperature, the right tail gas by air-introduced machine 10 periodically from the right another through combustion-supporting sky The regenerative chamber of gas cooling, exhaust temperature are progressively down to 130 DEG C or so discharges;Coal gas does not swap, and combustion air and tail Gas staggers in the right and left regenerative chamber swap time, i.e., the right regenerative chamber is handed over again after left side regenerative chamber exchanges interval of time It changes, the left side swaps again after the right regenerative chamber exchanges interval of time, and burner combustion is stablized.It is responsible for both sides with air-valve 9 to help Fire the distribution of air and tail gas amount.Small Fike detector 6 monitors small fire signal, and big Fike detector 7 monitors big fire signal, cut with coal gas Disconnected valve and some other equipment form safety interlocking.

Burner 5 uses diffusion combustion mode, and empty, coal gas sprays into burner hearth, can avoid being tempered respectively, increases burning and adjusts model It encloses, improves space gas mixing velocity using empty, Gas Flow speed difference, ensure combustion completion.

Remote controls such as air blower 11, air-introduced machine 10, low temperature four-way reversing valve 8 and high-temperature four-way reversal valve 3 and by technique Order sets program automatic start or stopping;The distribution of the two circuit combustion airs in left and right and gas volume is controlled with air-valve 9, is passed through Valve opening adjusts the size of both sides amount;System realizes a complete set of equipment by temperature, pressure, flow, flame scanner signal acquisition Automatic linkage controls;Four-way reversing valve breaks down, and without normal switch, program automatically cuts off coal gas, and air blower continues air blast, When failure can not exclude the short time, the operation of single valve group is switched to, it is ensured that tube furnace normal use,

Exhaust temperature is excessively high, regenerative chamber temperature anomaly, adjust automatically commutating period or adjustment gas volume, air blower and air-introduced machine Signal feedback is interrupted, and program automatically cuts off coal gas, and when main gas pressure is too low, system meeting automatic alarm cuts off main coal gas;Drum When wind turbine breaks down or electric fault occurs, gas cutting.

Heat-storage tubular heating furnace exhaust gas of the present invention is directly entered regenerative chamber, is contacted directly with regenerative chamber, mainly passes through heat The mode of conduction and heat radiation transfers heat to regenerative chamber, and regenerative chamber is made to absorb heat, the rise of accumulation of heat room temperature, exhaust temperature It reduces;Combustion air is also directly entered regenerative chamber, is contacted directly with regenerative chamber, will directly by way of heat transfer and heat radiation The heat absorption of regenerative chamber is got off, and accumulation of heat room temperature reduces, combustion air temperature rise.

This practicality invention is using the strong mullite ceramic regenerative chamber with anti-blocking pass of heat storage capacity, and service life is long, cost It is low, resistance to chilling and shock heating;Regenerative chamber there is no aoxidize, fouling reduce heat exchange efficiency reduction the problem of;Regenerative chamber is equipped with heat preservation Function, included heat-resisting steel lining;Equipped with anti-moving bit function(High-temperature refractory steel).

The present invention carries platform and stair, easy to operation and maintenance in itself;The observation door and explosion proof door of tube furnace and each Kind instrumentation has special inspection platform, operates simple and easy to do;Furnace body thermal insulation layer mainly just uses mullite pouring material and silicon Sour aluminum fiber mat is resistant to 1300 DEG C of temperature;Coiled tube supports use resistance to 1100 DEG C of casting heat resistant steel parts, can stablize support plate Pipe, is not in accident.

The foregoing is merely the embodiment of the present invention, are not intended to limit the invention, it is noted that any to be familiar with sheet The technical staff in field disclosed herein technical scope in, variation, replacement or the improvement that can readily occur in should all be covered Within protection scope of the present invention.

Claims (9)

1. a kind of high-efficiency heat-accumulating tubular heater system includes tubular type furnace body, burner, regenerative chamber, four-way reversing valve, air blast Machine, air-introduced machine, with air-valve and flame detector, it is characterised in that the tubular heater device burning need combustion air and production The periodical exchange in the Two-cuff Technique room of double loop realizes heat exchange to raw tail gas respectively, and combustion air is periodical respectively by air blower One regenerative chamber after tail gas exchanges heat in the left side and the right is blasted, the temperature of combustion air is made to rise to 300 DEG C or more by room temperature;Tail Gas by air-introduced machine periodically from the corresponding regenerative chamber to cool down through combustion air in the left side and the right, be progressively down to by exhaust temperature 130 DEG C or so discharges, combustion air and tail gas realize two-way double loop disengaging respectively, through four-way reversing valve by programme-control or so Regenerative chamber respectively performance period, changed by sexual intercourse, and coal gas does not switch, and reduces the fluctuation of burning, improves the thermal efficiency, extends tube furnace and uses Service life and the reduction comprehensive method of investment.
2. a kind of high-efficiency heat-accumulating tubular heater system according to claim 1, it is characterised in that the course of work is one The process of a periodicity and repeatability, i.e. combustion air periodically pass through four in left regenerative chamber and right regenerative chamber with repeatability respectively Logical reversal valve commutation, heat up laggard burner with one, left side regenerative chamber and the regenerative chamber heat exchange of one, the right respectively, and tail gas exists respectively Left regenerative chamber and right regenerative chamber are periodically commutated with repeatability by four-way reversing valve, respectively with another regenerative chamber of the left side and the right side It is discharged after another regenerative chamber heat exchange cooling of side by air-introduced machine through chimney, by the way that program is controlled to be controlled, exhaust gas temperature reduces, Be conducive to extend tubular type furnace li`.
3. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:It is double using left and right double loop Regenerative chamber, i.e. 2, left side regenerative chamber 1 go out tail gas for 1 into combustion air, and 2, the right regenerative chamber 1 goes out for 1 into combustion air Tail gas, left and right each individually swap and are independent of each other, and the time that the left side and the right exchange staggers, and ensures the stabilization of burning.
4. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:Simply air and tail gas exist Regenerative chamber periodical exchange and heat exchange, coal gas does not swap and heat exchange is directly entered coal gas burner, avoids the fluctuation of burning.
5. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:Tail gas and combustion air are straight It taps into inside regenerative chamber, is contacted directly with regenerative chamber, storage is mainly transferred heat to by way of heat transfer and heat radiation Hot cell, regenerative chamber impart heat to combustion air again, and tube furnace eliminates traditional convection section, and the equipment for reducing tube furnace is thrown Money.
6. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:Using coal gas burner, make With diffusion combustion mode, empty, coal gas sprays into burner hearth, can avoid being tempered respectively, increases burning adjustable range;Using high gas speed It is designed with low air flow speed, so improves space gas mixing velocity using current difference, ensure combustion completion.
7. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:Using two-way Two-cuff Technique Room can realize that two-way regenerative chamber uses simultaneously, can also unidirectionally use, and one to when breaking down, another to can normally make With not affecting the normal production.
8. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:Big fire and small fire are set Fire inspection detection control signal, sets associated safety to interlock, abnormal conditions coal gas occur can automatically cut off.
9. a kind of high-efficiency heat-accumulating tubular heater system according to right 1, it is characterised in that:It is air blower, air-introduced machine, low Warm four-way valve, high-temperature four-way valve, chimney valve and gravity-flow ventilation valve remote control press process sequence automatic start or stopping, automatic water Flat height, it is easy to operate.
CN201610983077.4A 2016-11-09 2016-11-09 A kind of high-efficiency heat-accumulating tubular heater system CN108072274A (en)

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CN201610983077.4A CN108072274A (en) 2016-11-09 2016-11-09 A kind of high-efficiency heat-accumulating tubular heater system

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Application Number Priority Date Filing Date Title
CN201610983077.4A CN108072274A (en) 2016-11-09 2016-11-09 A kind of high-efficiency heat-accumulating tubular heater system

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020052059A (en) * 2000-12-23 2002-07-02 이구택 Overheating protection apparatus of the slab edge in reheating furnace
JP2002277171A (en) * 2001-03-19 2002-09-25 Miyamoto Kogyosho Co Ltd Heating furnace for regenerative burner
CN201184696Y (en) * 2008-03-14 2009-01-21 江苏焱鑫科技集团有限公司 Tube type heating stove
CN203489670U (en) * 2013-05-30 2014-03-19 北京神雾环境能源科技集团股份有限公司 Regenerative type continuous flame tube heating furnace
CN105674759A (en) * 2016-04-14 2016-06-15 麻永强 Off-line heat accumulating type system recycling device for waste heat of industrial furnace flue gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020052059A (en) * 2000-12-23 2002-07-02 이구택 Overheating protection apparatus of the slab edge in reheating furnace
JP2002277171A (en) * 2001-03-19 2002-09-25 Miyamoto Kogyosho Co Ltd Heating furnace for regenerative burner
CN201184696Y (en) * 2008-03-14 2009-01-21 江苏焱鑫科技集团有限公司 Tube type heating stove
CN203489670U (en) * 2013-05-30 2014-03-19 北京神雾环境能源科技集团股份有限公司 Regenerative type continuous flame tube heating furnace
CN105674759A (en) * 2016-04-14 2016-06-15 麻永强 Off-line heat accumulating type system recycling device for waste heat of industrial furnace flue gas

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