CN103528368B - Quick switching heat accumulation type aluminum melting furnace - Google Patents
Quick switching heat accumulation type aluminum melting furnace Download PDFInfo
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- CN103528368B CN103528368B CN201310504934.4A CN201310504934A CN103528368B CN 103528368 B CN103528368 B CN 103528368B CN 201310504934 A CN201310504934 A CN 201310504934A CN 103528368 B CN103528368 B CN 103528368B
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Abstract
The open one of the present invention switches heat accumulation type aluminum melting furnace fast, comprising: body of heater, first and second fuel nozzle, first and second breather pipe, first and second thermal storage device, first and second air inlet pipe.The side end wall that first and second breather pipe is disposed on body of heater is communicated with burner hearth, and first and second breather pipe lays respectively at below first and second fuel nozzle.First thermal storage device comprises the first port, the second port and the 3rd port.First port of the first thermal storage device is communicated with the first air inlet pipe, and the second port of the first thermal storage device is communicated with the first breather pipe, and the 3rd port of the first thermal storage device is communicated to chimney by pipeline.Second thermal storage device comprises the first port, the second port and the 3rd port.First port of the second thermal storage device is communicated with the second air inlet pipe, and the second port of the second thermal storage device is communicated with the second breather pipe, and the 3rd port of the second thermal storage device is communicated to chimney by pipeline.First and second thermal storage device is switchover operation between preheating and accumulation of heat duty alternately.
Description
Technical field
The present invention relates to a kind of molten aluminium stove, particularly one melts aluminium stove heat accumulating type waste heat recovery system.
Background technology
In the face of increasingly serious environmental problem and energy crisis; energy-saving and emission-reduction are all being advocated energetically in the whole world; especially for consuming energy and polluting all more serious Industrial Stoves related industry; how carrying out energy-saving and emission-reduction transformation, having become the factor that those skilled in the art must consider when designing this kind equipment.
For molten aluminium stove, the flue-gas temperature of its smoke outlet can reach 1000 degrees centigrade usually.If be directly discharged in environment by these high-temperature flue gas, energy waste not only can be caused also to cause destruction to a certain degree to environment.
In addition, HTAC (HighTemperatureAirCombustion, be called for short HTAC) from last century end just at home and abroad extensively promote.Those skilled in the art constantly develop the technology and equipment utilizing high-temperature flue gas accumulation of heat combustion-supporting.
A kind of low Nox high-efficiency thermal storage industrial furnace disclosed in No. 03244707.8, Chinese patent, comprise body of heater, combustion air preheating/exhaust emission tube road, regenerator and reversing arrangement, wherein, at lower portion of furnace body, a pair regenerator is at least set near furnace wall side, high-temperature flue gas enters regenerator inside regenerator, high temperature combustion air enters in stove from the inner side of another regenerator, is combustion air admission passage/smoke evacuation passing away outside regenerator; Fill heat storage in regenerator, the comburent air duct/smoke discharging pipe of regenerator both sides connects exchange system, makes alternately preheated air or the accumulation of heat smoke evacuation respectively of two regenerator by the switching of exchange system; The flue gas partial of discharging enters comburent air duct, and the oxygen content in combustion air is reduced, and reduces ignition temperature to reduce the growing amount of nitrogen oxide in combustion.
And for example disclosed in No. 200510134477.X, Chinese patent, a kind of tool improves the switching burner of gas concentration lwevel, it utilizes two groups of burners to switch the mode of burning, fuel energy conversion is carried out in combustion chamber, and burning institute produces receive flue gas can pass through another organize burner, utilize heat storage heat energy storage, and partial fume is retained, and in next circulation time, be directed through the heat storage preheating of burner, and together enter in combustion chamber and burn, by this mode, discharged carbon dioxide flue gas concentration can be improved.
For another example the energy saving and environment friendly shuttle kiln of a kind of heat accumulating type high-temperature air burning disclosed in No. 201210073968.8, Chinese patent application, energy-efficient, the combustion heating system that are made up of body of heater, regenerator or heat-storage type burner, air and fume reversing valve.This shuttle kiln adopts brand-new heat accumulating type high-temperature air burning (HTAC) technology, by the switching of reversal valve, makes the alternation under accumulation of heat and heat release state of two regenerator, the waste heat of recovered flue gas efficiently, then combustion air is preheating to more than 1000 DEG C.
But, all there is following shortcoming or deficiency in the technology disclosed in above-mentioned three patent/patent applications: (1), adopt a pair burner to be separately positioned on the both sides of body of heater, and adopt a pair regenerator/heat storage to be separately positioned on the both sides of body of heater, need equipment out of service when switch operating state, make burning discontinuous; (2), adopt bilateral symmetry arrangement, make line arrangement complex structure; (3), flue gas still has part of waste heat after regenerator/heat storage is discharged, and is directly discharged in environment, and energy waste still can be caused also to cause destruction to a certain degree to environment; (4), regenerator/heat storage all adopts single structure, do not consider the impact that the cigarette ash in flue gas causes regenerator/regenerator performance.
Therefore, provide a kind of and can make full use of fume afterheat, improve the quick switching heat accumulation type aluminum melting furnace of heat storage performance and become urgent problem in the industry.
Summary of the invention
The object of this invention is to provide one and switch heat accumulation type aluminum melting furnace fast, it fully can be recycled high-temperature flue gas waste heat, realize switching heat-accumulation combustion fast.
According to the solution of the present invention, providing one to switch heat accumulation type aluminum melting furnace fast, comprising: body of heater, in body of heater, being provided with the burner hearth for heating aluminium; And first fuel nozzle and the second fuel nozzle, the first fuel nozzle and the second fuel nozzle are disposed on the side end wall of body of heater; Wherein, switch heat accumulation type aluminum melting furnace fast and comprise the first breather pipe, the second breather pipe, the first thermal storage device, the second thermal storage device, the first air inlet pipe and the second air inlet pipe further; The side end wall that first breather pipe and the second breather pipe are disposed on body of heater is communicated with burner hearth, and the first breather pipe and the second breather pipe lay respectively at below the first fuel nozzle and the second fuel nozzle; First thermal storage device comprises the first port, the second port and the 3rd port, and the first port of the first thermal storage device is communicated with the first air inlet pipe, and the second port of the first thermal storage device is communicated with the first breather pipe, and the 3rd port of the first thermal storage device is communicated to chimney by pipeline; Second thermal storage device comprises the first port, the second port and the 3rd port, and the first port of the second thermal storage device is communicated with the second air inlet pipe, and the second port of the second thermal storage device is communicated with the second breather pipe, and the 3rd port of the second thermal storage device is communicated to chimney by pipeline; And the first thermal storage device and the second thermal storage device be switchover operation between warm operation state and accumulation of heat duty alternately.
Preferably, quick switching heat accumulation type aluminum melting furnace may further include the aluminium transfer passage for aluminium being delivered to burner hearth, 3rd port of the first thermal storage device and/or the second thermal storage device is communicated to the smoke inlet of aluminium transfer passage by pipeline, for to the aluminium preheating in it, the exhanst gas outlet of aluminium transfer passage is communicated to chimney by pipeline.
Preferably, the settling zone that the first thermal storage device can comprise first order heat-accumulating area, heat-accumulating area, the second level and be arranged between first order heat-accumulating area and heat-accumulating area, the second level, settling zone is for precipitating the cigarette ash in flue gas.
Selectively, first port of the first thermal storage device is arranged on the heat-accumulating area, the second level of the first thermal storage device, second port of the first thermal storage device is arranged on the first order heat-accumulating area of the first thermal storage device, and the 3rd port of the first thermal storage device is arranged on the heat-accumulating area, the second level of the first thermal storage device.
Selectively, when the first thermal storage device is in warm operation state, the first port of the first thermal storage device as cool air inlet, the second port of the first thermal storage device as hot air outlet, the 3rd port shutdown of the first thermal storage device.When the first thermal storage device is in accumulation of heat duty, the first port shutdown of the first thermal storage device, the second port of the first thermal storage device is as high-temperature flue gas entry, and the 3rd port of the first thermal storage device exports as low-temperature flue gas.
Preferably, the settling zone that second thermal storage device can comprise first order heat-accumulating area, heat-accumulating area, the second level equally and be arranged between first order heat-accumulating area and heat-accumulating area, the second level, first port of the second thermal storage device is arranged on the heat-accumulating area, the second level of the second thermal storage device, second port of the second thermal storage device is arranged on the first order heat-accumulating area of the second thermal storage device, and the 3rd port of the second thermal storage device is arranged on the heat-accumulating area, the second level of the second thermal storage device.
Selectively, when the second thermal storage device is in warm operation state, the first port of the second thermal storage device as cool air inlet, the second port of the second thermal storage device as hot air outlet, the 3rd port shutdown of the second thermal storage device.When the second thermal storage device is in accumulation of heat duty, the first port shutdown of the second thermal storage device, the second port of the second thermal storage device is as high-temperature flue gas entry, and the 3rd port of the second thermal storage device exports as low-temperature flue gas.
Preferably, what the first order heat-accumulating area of the first thermal storage device and/or the second thermal storage device was filled is accumulation of heat rod, and what the heat-accumulating area, the second level of the first thermal storage device and/or the second thermal storage device was filled is honeycomb heat accumulation body.
Wherein, from the high-temperature flue gas in burner hearth first through the accumulation of heat rod heat-accumulating area that fluid resistance is less, cigarette ash is difficult to be attached to accumulation of heat rod and thus can not results in blockage.Cigarette ash in flue gas precipitates because of Action of Gravity Field in settling zone.Finally, flue gas continues through the larger honeycomb ceramics heat-accumulating area of fluid resistance, because cigarette ash fully precipitates, so honeycomb ceramics heat-accumulating area also can not be caused to block.
Meanwhile, high-temperature flue gas flow velocity behind accumulation of heat rod heat-accumulating area reduces, then after settling zone cushions further, speed obviously reduces, and is conducive to avoiding the remaining cigarette ash in flue gas to be attached to honeycomb heat accumulation body.
Selectively, switch fast heat accumulation type aluminum melting furnace and may further include control system, for controlling the first thermal storage device and the second thermal storage device according to predetermined period alternately switchover operation between warm operation state and accumulation of heat duty.
Selectively, fuel nozzle can select combustion gas, fuel oil or coal dust as fuel.
The invention has the beneficial effects as follows: (1), first and second thermal storage device and first and second fuel nozzle are arranged on the same side end wall of body of heater, when the first thermal storage device and the second thermal storage device replace switch operating state, first and second fuel nozzle can switch fast, and burning is not obviously interrupted; (2), first and second thermal storage device and first and second fuel nozzle be arranged on the same side end wall of body of heater, line arrangement constructed and simplifies; (3) low-temperature flue gas of, from the 3rd port of the first thermal storage device and/or the second thermal storage device discharging is not directly be expelled to external environment condition, but is first delivered to for aluminium preheating in aluminium transfer passage, thus further increases utilization rate of waste heat; (4), by the aluminium after preheating send into molten aluminium stove to heat-treat, power consumption can be saved for molten aluminium stove; (5), first and second thermal storage device adopts second configuration arrange settling zone, can effectively avoid cigarette ash block thermal storage device and reduce heat storage performance.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram that the present invention switches heat accumulation type aluminum melting furnace fast.
Fig. 2 shows the cross-sectional schematic along A-A line in Fig. 1.
Fig. 3 shows the organigram that the present invention switches the first thermal storage device of heat accumulation type aluminum melting furnace fast.
Detailed description of the invention
Please refer to Fig. 1 and Fig. 2, according to one embodiment of the present invention, switch heat accumulation type aluminum melting furnace fast and comprise: body of heater 100, first fuel nozzle 210, second fuel nozzle 250, first breather pipe 310, second breather pipe 350, first thermal storage device 400, second thermal storage device 500, first air inlet pipe 610, second air inlet pipe 650 and aluminium transfer passage 700.
The burner hearth 110 for heating aluminium is provided with in body of heater 100.First fuel nozzle 210 and the second fuel nozzle 250 are disposed on the side end wall of body of heater 100.The same side end wall that first breather pipe 310 and the second breather pipe 350 are disposed on body of heater 100 lays respectively at below the first fuel nozzle 210 and the second fuel nozzle 250.First breather pipe 310, second breather pipe 350 is communicated with burner hearth 110 gas respectively.In use, the first fuel nozzle 210/ second fuel nozzle 250 is injected in burner hearth 110 for being dived from inclined upward by fuel, the fuel of injection and the abundant mixed combustion of combustion air supplied in the first breather pipe 310/ second breather pipe 350 of corresponding below.
Aluminium transfer passage 700 is heat-treated for being delivered in burner hearth 110 by aluminium 800.Aluminium transfer passage 700 is provided with conveyer belt 710, smoke inlet 730 and exhanst gas outlet 750 for delivering aluminium 800.Smoke inlet 730 carries out preheating for being introduced by flue gas in aluminium transfer passage 700 to aluminium 800, and flue gas is expelled to chimney 900 by exhanst gas outlet 750 subsequently.
First thermal storage device 400 comprises the first port 410, second port 420 and the 3rd port 430.First port 410 of the first thermal storage device 400 is communicated with the first air inlet pipe 610.Second port 420 of the first thermal storage device 400 is communicated with the first breather pipe 310.3rd port 430 of the first thermal storage device 400 is communicated to the smoke inlet 730 of aluminium transfer passage 700 by pipeline.
Please refer to Fig. 3, the settling zone 460 that the first thermal storage device 400 comprises first order heat-accumulating area 450, heat-accumulating area, the second level 470 and is arranged between first order heat-accumulating area 450 and heat-accumulating area, the second level 470, settling zone 460 is for precipitating the cigarette ash in flue gas.In the non-limiting embodiment shown in Fig. 3, what the first order heat-accumulating area 450 of the first thermal storage device 400 was filled is accumulation of heat rod, what the heat-accumulating area, the second level 470 of the first thermal storage device 400 was filled is honeycomb heat accumulation body, and, first order heat-accumulating area 450 and heat-accumulating area, the second level 470 erected parallel, above settling zone 460, form U-shaped like and arrange.
First port 410 of the first thermal storage device 400 and the 3rd port 430 are disposed in parallel in the end of the heat-accumulating area, the second level 470 of the first thermal storage device 400.Second port 420 of the first thermal storage device 400 is arranged on the end of the first order heat-accumulating area 450 of the first thermal storage device 400.
In the non-limiting embodiment shown in Fig. 1, the second thermal storage device 500 has the structure identical with the first thermal storage device 400, and it comprises the first port 510, second port 520 and the 3rd port 530.First port 510 of the second thermal storage device 500 is communicated with the second air inlet pipe 650, and the second port 520 of the second thermal storage device 500 is communicated with the second breather pipe 350.3rd port 530 of the second thermal storage device 500 is also communicated to the smoke inlet 730 of aluminium transfer passage 700 by pipeline.
Similarly, the second thermal storage device 500 settling zone (not shown) of also comprising first order heat-accumulating area (not shown), heat-accumulating area, the second level (not shown) and being arranged between first order heat-accumulating area and heat-accumulating area, the second level.What the first order heat-accumulating area of the second thermal storage device 500 was filled is accumulation of heat rod, and what the heat-accumulating area, the second level of the second thermal storage device 500 was filled is honeycomb heat accumulation body, and first order heat-accumulating area and heat-accumulating area, second level erected parallel, above settling zone, form U-shaped like layout.
First port 510 of the second thermal storage device 500 and the 3rd port 530 are disposed in parallel in the end of the heat-accumulating area, the second level of the second thermal storage device 500, and the second port 520 of the second thermal storage device 500 is arranged on the end of the first order heat-accumulating area of the second thermal storage device 500.
The non-limiting mode of operation of one according to the present invention, please refer to stream shown in the dotted line in Fig. 1, when when the first thermal storage device 400 is in warm operation state, the second thermal storage device 500 is in accumulation of heat duty, the 3rd port 430 of the first thermal storage device 400 is closed by corresponding control valve (not shown).Enter the first port 410 of the first thermal storage device 400 via the first air inlet pipe 610 from the cold air of the first blower fan 620.The second port 420 through the first thermal storage device 400 after cold air is fully warmed-up in the first thermal storage device 400 flows out to the first breather pipe 310, and then is delivered to the fuel mix of spraying with the first fuel nozzle 210 in burner hearth 110 and burns.Now, the first port 510 of the second thermal storage device 500 is closed by corresponding control valve (not shown), and meanwhile, the second fuel nozzle 210 cuts out.Accumulation of heat in the second thermal storage device 500 is entered by the second breather pipe 350 via the second port 520 of the second thermal storage device 500 from the high-temperature flue gas in burner hearth 110.Low-temperature flue gas after accumulation of heat is delivered to the smoke inlet 730 of aluminium transfer passage 700 via the 3rd port 530 of the second thermal storage device 500.Flue gas is expelled to chimney 900 to warp after aluminium 800 preheating by the exhanst gas outlet 750 of aluminium transfer passage 700 in aluminium transfer passage 700.
The non-limiting mode of operation of one according to the present invention, please refer to stream shown in the chain-dotted line in Fig. 1, when when the second thermal storage device 500 is in warm operation state, the first thermal storage device 400 is in accumulation of heat duty, the 3rd port 530 of the second thermal storage device 500 is closed by corresponding control valve (not shown).Enter the first port 510 of the second thermal storage device 500 via the second air inlet pipe 650 from the cold air of the second blower fan 660.The second port 520 through the second thermal storage device 500 after cold air is fully warmed-up in the second thermal storage device 500 flows out to the second breather pipe 350, and then is delivered to the fuel mix of spraying with the second fuel nozzle 250 in burner hearth 110 and burns.Now, the first port 410 of the first thermal storage device 400 is closed by corresponding control valve (not shown), and meanwhile, the first fuel nozzle 210 cuts out.Accumulation of heat in the first thermal storage device 400 is entered by the first breather pipe 310 via the second port 420 of the first thermal storage device 400 from the high-temperature flue gas in burner hearth 110.Low-temperature flue gas after accumulation of heat is delivered to the smoke inlet 730 of aluminium transfer passage 700 via the 3rd port 430 of the first thermal storage device 400.Flue gas is expelled to chimney 900 to warp after aluminium 800 preheating by the exhanst gas outlet 750 of aluminium transfer passage 700 in aluminium transfer passage 700.
Thus, present invention achieves the first thermal storage device 400 and the second thermal storage device 500 alternately between warm operation state and accumulation of heat duty continuous free of discontinuities run.
As a kind of alternative embodiments, the 3rd port 430/530 of the first thermal storage device 400 of the present invention and/or the second thermal storage device 500 is directly communicated to chimney (external environment condition) and without aluminium transfer passage 700.
Although describe the preferred embodiment of the present invention in detail at this, but should be understood that the present invention is not limited to the concrete structure described in detail and illustrate here, other modification and variant can be realized when not departing from the spirit and scope of the invention by those skilled in the art.Such as, first order heat-accumulating area and the heat-accumulating area, the second level of the first or second thermal storage device can be horizontally disposed with, and settling zone is connected horizontally between first order heat-accumulating area and heat-accumulating area, the second level, and settling zone can adopt similar serpentine-like configuration to be beneficial to smoke deposition further.In addition, the temperature and pressure parameter of system suitably can be chosen in scope disclosed in this invention according to concrete application conditions.
Claims (8)
1. switch a heat accumulation type aluminum melting furnace fast, comprising:
Body of heater, is provided with the burner hearth for heating aluminium in described body of heater; And
First fuel nozzle and the second fuel nozzle, described first fuel nozzle and described second fuel nozzle are disposed on the side end wall of described body of heater;
It is characterized in that:
Described quick switching heat accumulation type aluminum melting furnace comprises the first breather pipe, the second breather pipe, the first thermal storage device, the second thermal storage device, the first air inlet pipe, the second air inlet pipe and the aluminium transfer passage for aluminium being delivered to described burner hearth further;
The described side end wall that described first breather pipe and described second breather pipe are disposed on described body of heater is communicated with described burner hearth, and described first breather pipe and described second breather pipe lay respectively at below described first fuel nozzle and described second fuel nozzle;
Described first thermal storage device comprises the first port, the second port and the 3rd port, described first port of described first thermal storage device is communicated with described first air inlet pipe, described second port of described first thermal storage device is communicated with described first breather pipe, described 3rd port of described first thermal storage device is communicated to the smoke inlet of described aluminium transfer passage by pipeline, the exhanst gas outlet of described aluminium transfer passage is communicated to chimney by pipeline;
Described second thermal storage device comprises the first port, the second port and the 3rd port, described first port of described second thermal storage device is communicated with described second air inlet pipe, described second port of described second thermal storage device is communicated with described second breather pipe, and described 3rd port of described second thermal storage device is communicated to the described smoke inlet of described aluminium transfer passage by pipeline; And
Described first thermal storage device and described second thermal storage device be switchover operation between warm operation state and accumulation of heat duty alternately, the settling zone that described first thermal storage device and described second thermal storage device comprise first order heat-accumulating area, heat-accumulating area, the second level respectively and be arranged between described first order heat-accumulating area and heat-accumulating area, the described second level.
2. switch heat accumulation type aluminum melting furnace fast as claimed in claim 1, it is characterized in that, described first port of described first thermal storage device is arranged on the heat-accumulating area, the described second level of described first thermal storage device, described second port of described first thermal storage device is arranged on the described first order heat-accumulating area of described first thermal storage device, and described 3rd port of described first thermal storage device is arranged on the heat-accumulating area, the described second level of described first thermal storage device.
3. switch heat accumulation type aluminum melting furnace fast as claimed in claim 2, it is characterized in that, when described first thermal storage device is in warm operation state, described first port of described first thermal storage device is as cool air inlet, described second port of described first thermal storage device as hot air outlet, described 3rd port shutdown of described first thermal storage device.
4. switch heat accumulation type aluminum melting furnace fast as claimed in claim 2, it is characterized in that, when described first thermal storage device is in accumulation of heat duty, described first port shutdown of described first thermal storage device, described second port of described first thermal storage device is as high-temperature flue gas entry, and described 3rd port of described first thermal storage device exports as low-temperature flue gas.
5. switch heat accumulation type aluminum melting furnace fast as claimed in claim 1, it is characterized in that, described first port of described second thermal storage device is arranged on the heat-accumulating area, the described second level of described second thermal storage device, described second port of described second thermal storage device is arranged on the described first order heat-accumulating area of described second thermal storage device, and described 3rd port of described second thermal storage device is arranged on the heat-accumulating area, the described second level of described second thermal storage device.
6. switch heat accumulation type aluminum melting furnace fast as claimed in claim 5, it is characterized in that, when described second thermal storage device is in warm operation state, described first port of described second thermal storage device is as cool air inlet, described second port of described second thermal storage device as hot air outlet, described 3rd port shutdown of described second thermal storage device.
7. switch heat accumulation type aluminum melting furnace fast as claimed in claim 5, it is characterized in that, when described second thermal storage device is in accumulation of heat duty, described first port shutdown of described second thermal storage device, described second port of described second thermal storage device is as high-temperature flue gas entry, and described 3rd port of described second thermal storage device exports as low-temperature flue gas.
8. the quick switching heat accumulation type aluminum melting furnace according to any one of claim 1-7, it is characterized in that, what the described first order heat-accumulating area of described first thermal storage device or described second thermal storage device was filled is accumulation of heat rod, and what the heat-accumulating area, the described second level of described first thermal storage device or described second thermal storage device was filled is honeycomb heat accumulation body.
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| JP2002106832A (en) * | 2000-09-27 | 2002-04-10 | Nkk Corp | Regenerative burner furnace and its operation method |
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| CN102549339A (en) * | 2009-10-23 | 2012-07-04 | 株式会社Ihi | Combustion facility using heat accumulation type burners and combustion method for heat accumulation type burners |
| CN102607267A (en) * | 2012-03-20 | 2012-07-25 | 朱海生 | Regenerative high-temperature air combustion energy-saving environment-friendly shuttle-type kiln |
| CN103134321A (en) * | 2013-03-29 | 2013-06-05 | 攀枝花市朵实机械制造有限公司 | High thermal efficiency regenerative heating furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103017518B (en) * | 2011-09-22 | 2014-12-10 | 品达科技股份有限公司 | Metal melting furnace and metal melting method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002106832A (en) * | 2000-09-27 | 2002-04-10 | Nkk Corp | Regenerative burner furnace and its operation method |
| CN102549339A (en) * | 2009-10-23 | 2012-07-04 | 株式会社Ihi | Combustion facility using heat accumulation type burners and combustion method for heat accumulation type burners |
| CN101832708A (en) * | 2010-04-23 | 2010-09-15 | 浙江大学 | Heat storage immersed isothermal smelting furnace |
| CN102607267A (en) * | 2012-03-20 | 2012-07-25 | 朱海生 | Regenerative high-temperature air combustion energy-saving environment-friendly shuttle-type kiln |
| CN103134321A (en) * | 2013-03-29 | 2013-06-05 | 攀枝花市朵实机械制造有限公司 | High thermal efficiency regenerative heating furnace |
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