CN102829485B - Horizontal heat accumulating type efficient heat exchanger - Google Patents

Horizontal heat accumulating type efficient heat exchanger Download PDF

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Publication number
CN102829485B
CN102829485B CN201210357976.5A CN201210357976A CN102829485B CN 102829485 B CN102829485 B CN 102829485B CN 201210357976 A CN201210357976 A CN 201210357976A CN 102829485 B CN102829485 B CN 102829485B
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cavity
cylinder housing
air
horizontal cylinder
heat
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CN102829485A (en
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闫红杰
周孑民
母福生
熊宏志
杨万青
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Central South University
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Central South University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a horizontal heat accumulating type efficient heat exchanger. The inner wall of a horizontal cylindrical housing (20) is provided with a heat insulation layer (14); the inside of the horizontal cylindrical housing (20) is separated by a separating plate to form six identical axial cavities, namely a first cavity (1), a second cavity (2), a third cavity (3), a fourth cavity (4), a fifth cavity (5) and a sixth cavity (6); each of the axial cavities is filled with a heat accumulating body; a rotating shaft (11) is provided with two rotors (12), which are correspondingly connected with the two ends of the axial cavities respectively; each rotor (12) is provided with three air jackets (19), which are separately arranged in the circumferential direction; and the rotors divide a passage into two parts. According to the horizontal heat accumulating type efficient heat exchanger disclosed by the invention, a heat accumulating chamber with large weight is fixed, the afterheat of smoke is extremely recovered, and the heat efficiency of a system is obviously improved.

Description

A kind of horizontal heat-accumulated type high-efficiency heat exchanger
Technical field
The present invention relates to a kind of heat storage exchanging appts, utilize the heat of high-temperature flue gas in various industrial furnace flue to carry out warm-up combustion-supporting air.Two groups of air-casing devices that a cylindrical shell filling up heat storage and two ends are driven by servomotor achieve the heat regenerator that burner provides hot blast continuously and discharges cooled flue gas.
Background technology
The die is cast for anxiety and the shortage of China's energy, had a strong impact on expanding economy.Current China industrial furnace energy utilization rate is generally on the low side, there are now some forge furnaces, due to the feature of technological operation, major part heating furnace for forging come out of the stove EGT all higher than 1000 DEG C, because not being applicable to the high-efficiency waste heat recovery device of Long-Time Service, waste gas heat loss is very large, so that the thermal efficiency of stove is only 5% ~ 10%, thus causes the significant wastage of fuel.In Iron and Steel Enterprises in China, the air preheater majority that Thermal Equipment generally adopts is common metal heat exchanger, and Long-Time Service temperature is at 700 ~ 800 DEG C, and air preheating temperature is 400 ~ 500 DEG C.Heat exchanger efficiency is about 50% ~ 60% [1].A large amount of fume afterheats is not fully utilized, and the burn up level of Thermal Equipment is generally higher than external equivalent devices.
Around the energy-saving and cost-reducing further problem of heating furnace, domestic thermal technology circle had once carried out large quantifier elimination and exploration work.Wherein, " waste heat is entirely from reclaiming [2]" and " three high and one low [3]" viewpoint once caused the common concern of thermal technology circle." waste heat is entirely from reclaiming " refers to: use high-performance heat exchanger that EGT is dropped to less than 200 DEG C, strengthen stove adiabatic, to reduce all other heat loss of stove simultaneously; " three high and one low " refers to: implement " high furnace temperature ", " high cigarette temperature " operation to stove, carries out " efficient waste heat recovery " simultaneously and use " low dark decay " material to flue gas on stove.These two kinds imaginations reflect the developing direction of monomer Thermal Equipment energy saving research to a certain extent.Its precondition be achieved to have reliable high-efficiency waste heat recovery device.But suffer from the heat-exchange device do not met the demands completely, all can not realize well.
Heat-accumulation type hot switching technology is the novel energy-conserving technology of rising the eighties in last century, and the maximum feature of this technology is energy-efficient, and average energy saving can improve 30% again on existing basis; Corresponding high-temp combustion technology, not only increases the efficiency of combustion of fuel, more effectively opens the Appropriate application approach of low calorie fuels therewith [4].The application of heat-accumulation type hot switching technology, its meaning is: not only save fuel to the full extent, and reduces pollutant discharge amount, meets the strategic requirement of China's industrial sustainable development.Pottery heat exchanger comes out with accumulation of heat form, and heat exchange form subsequently develops soon.Reason is that ceramic recuperator is high temperature resistant, and air preheating temperature is high, and after application, energy-saving effect is remarkable, when flue-gas temperature is 1000 ~ 1250 DEG C, and can air preheat to 900 ~ 1000 DEG C.Adopt heat exchanger, the material restriction of the exhaust gas temperature of burner hearth no longer heated exchanger [5], can realize high-temperature smoke discharging, correspondingly the high temperature preheating of combustion air becomes possibility.
[1] Zhang Fabo. the emulation of filling ball regenerator thermal process and optimal design. Beijing: University of Science & Technology, Beijing, 2007.
[2] Hu Yanbang, the efficient heating stove of combustion blast furnace gas. energy supply for metallurgy, 1988,7 (6): 9-16.
[3] Zhang Xianyue etc., about the discussion of industrial heating furnace developing direction. industrial furnace, and 1990,2,3.
Li Chaoxiang. the application and forecast [J] of heat-accumulation type hot switching technology. energy supply for metallurgy, 2004,23 (2): 45 ~ 49.
Summary of the invention
Technical problem to be solved by this invention is to provide one and makes the larger regenerator transfixion of weight, the waste heat of limit recovered flue gas, significantly improves the horizontal heat-accumulated type high-efficiency heat exchanger of the thermal efficiency of system.
In order to solve the problems of the technologies described above, horizontal heat-accumulated type high-efficiency heat exchanger provided by the invention, the inwall of horizontal cylinder housing is provided with insulating, described horizontal cylinder enclosure interior baffle for separating becomes six equal axial cavity: the first cavity, second cavity, 3rd cavity, 4th cavity, 5th cavity and the 6th cavity, all heat storage is filled with in described axial cavity, the two ends of described axial cavity are provided with punching baffle plate and are used for fixing heat storage, one end of described horizontal cylinder housing is provided with downtake pipe and the first air inlet pipe, the other end is provided with second exhaust pipe and the second air inlet pipe, in described horizontal cylinder housing, two ends are respectively equipped with a mozzle, a mozzle is connected with the first described air inlet pipe, mozzle described in another is connected with described second exhaust pipe, described mozzle is equipped with the pore be communicated with described horizontal cylinder housing cavity, be provided with in described horizontal cylinder housing by motor-operated rotating shaft, described rotating shaft is provided with two rotors of connecting corresponding to the two ends of described horizontal cylinder housing respectively, each described rotor is provided with the air-casing of three alternate settings of circumference, the downtake pipe described in the connection of inside of the air-casing of described rotor when a phase place described in three, second air inlet pipe and the axial cavity described in alternate three, described mozzle and another three alternate described axial cavity are connected between three alternate described air-casings, described rotor rotates the downtake pipe described in 60 ° of connections of the inside to air-casing during another phase place described in three, second air inlet pipe and another three alternate described axial cavity, the described mozzle described axial cavity alternate with three is connected between three alternate described air-casings, described rotor, sealed by sealing device between described air-casing and described horizontal cylinder housing.
The bottom of described horizontal cylinder housing is mounted with can make described horizontal cylinder housing inclination certain angle, be convenient to the hydraulic tilting device of heat storage replacing.
Described heat storage is divided into according to different flue gas qualities: Ceramic Balls and ceramic honeycomb body.
Described motor is servomotor, and the rotation mode of described motor rotor driven is for swinging back and forth.
The first described air inlet pipe of flue gas and the described downtake pipe of air are located at same one end of described horizontal cylinder housing.
Described punching baffle plate is fixed together by bolt and described horizontal cylinder housing, convenient disassembly.
Adopt the horizontal heat-accumulated type high-efficiency heat exchanger of technique scheme, rotor is divided into two parts passage, and front half period flue gas enters mozzle by the first air inlet pipe and enters rotor through pore and enter one, three, five cavity heat storage bodies through baffle plate; Air enters other passage by the second air inlet pipe and flows through the heat storage absorption heat heated in two, four, six cavitys through punching baffle plate; Cooled flue gas is discharged by second exhaust pipe, is entered burner provide hot blast by the air heated by downtake pipe; Second cycle is when starting, motor rotor driven rotates 60 °, at this moment flue gas enters through rotor from the first air inlet pipe and flows through passage that air just now flows through and enter two, four, six cavitys and add by air cooled heat storage, and air is entered by the second air inlet pipe and flows through other passage and enter one, three, five cavitys and absorb the heat storage that flue gas cross; Cooled flue gas is discharged by second exhaust pipe, and the air after heating counts burner by downtake pipe, and realizing provides hot blast continuously.
This heat exchanger fills up heat storage horizontal cylinder housing in the middle of adopting maintains static, drive the rotor of very light weight to realize cold and hot gas by the servomotor at two ends and realize heat exchange alternately across heat storage, the rotation mode of servomotor rotor driven swings back and forth, because rotor quality is light, so quick, light and handy switching can be realized; Avoid traditional motor directly drive the power consumption of accumulation of heat barrel body rotation large, have noise, regulate inflexible shortcoming; The rotation mode of this invention rotor, for swinging back and forth, this avoid and continues in the same direction to rotate the accumulated error caused.
The present invention is provided with hydraulic tilting device in horizontal cylinder lower housing portion, is convenient to the replacing of heat storage; Because the import of flue gas and the outlet of air are in same one end, so each maintenance only need change the heat storage of temperature end.
Advantage of the present invention and good effect
1, a device is established in novel continuous heat accumulation type heat exchange, and it adopts motor to drive the rotor of very light weight in gas reversing arrangement to rotate, and realizes cold fluid and hot fluid alternating current through heat storage into and out of tracheae and regenerative apparatus transfixion;
2, achieve burner continuous heat supply wind, and discharge cooled flue gas; Flue-gas temperature 1000 ~ 1200 DEG C it can by air preheat to 900 ~ 1100 DEG C, about reducing exhaust gas temperature to 200 ~ 300 DEG C, recovered flue gas preheating 75 ~ 90%;
3, reversal valve operation is rapid, light, can provide the combustion air of preheating while commutation continuously, overcomes burner hearth when tradition commutation regenerator needs two cover burners simultaneously and introduces and changes large shortcoming;
4, directly can to spray into burner hearth through burner combustion-supporting for the high temperature air of preheating, so both improves the efficiency of combustion of system, additionally reduce the discharge of pollutant, energy-saving and cost-reducing, simultaneously also environmental protect.
In sum, the present invention is that one makes the larger regenerator transfixion of weight, the waste heat of limit recovered flue gas, significantly improves the horizontal heat-accumulated type high-efficiency heat exchanger of the thermal efficiency of system.
Accompanying drawing explanation
Fig. 1 is front view of the present invention.
Fig. 2 is top view of the present invention.
Fig. 3 is along A-A line cut-away view in Fig. 1.
Fig. 4 is along D-D line cut-away view in Fig. 1.
Fig. 5 is the structural representation turned.
Fig. 6 is heat storage Ceramic Balls structural representation.
Fig. 7 is heat storage ceramic honeycomb structure schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the inwall of horizontal cylinder housing 20 is provided with insulating 14, horizontal cylinder housing 20 inside baffle for separating becomes six equal axial cavity: the first cavity 1, second cavity 2, 3rd cavity 3, 4th cavity 4, 5th cavity 5 and the 6th cavity 6, all heat storage is filled with in axial cavity, the two ends of axial cavity are provided with punching baffle plate 13 and are used for fixing heat storage, heat storage is divided into according to different flue gas qualities: Ceramic Balls 21 and ceramic honeycomb body 18, punching baffle plate 13 is fixed together by bolt and horizontal cylinder housing 20, convenient disassembly.One end of horizontal cylinder housing 20 is provided with downtake pipe 7 and the first air inlet pipe 8, and the other end is provided with second exhaust pipe 9 and the second air inlet pipe 10, and the first air inlet pipe 8 of flue gas and the downtake pipe 7 of air are located at the same one end of horizontal cylinder housing 20.In horizontal cylinder housing 20, two ends are respectively equipped with a mozzle 15, a mozzle is connected with the first air inlet pipe 8, another mozzle 15 is connected with second exhaust pipe 9, mozzle 15 is equipped with the pore 16 with horizontal cylinder housing 20 inner space, the rotating shaft 11 driven by motor 17 is provided with in horizontal cylinder housing 20, rotating shaft 11 is provided with two rotors 12 of connecting corresponding to the two ends of horizontal cylinder housing 20 respectively, motor 17 is servomotor, the rotation mode of motor 17 rotor driven 12 is for swinging back and forth, each rotor 12 is provided with the air-casing 19 of three alternate settings of circumference, the inside of rotor 12 three air-casings 19 when a phase place connects downtake pipe 7, second air inlet pipe 10 and alternate three axial cavity--the first cavity 1, 3rd cavity 3 and the 5th cavity 5, mozzle 15 and another three alternate axial cavity-the second cavitys 2 are connected between three alternate air-casings 19, 4th cavity 4 and the 6th cavity 6, rotor 12 rotates 60 ° of inside to three air-casings 19 during another phase place and connects downtake pipe 7, second air inlet pipe 10 and another three alternate axial cavity-the second cavitys 2, 4th cavity 4 and the 6th cavity 6, mozzle 15 axial cavity-the first cavity 1 alternate with three is connected between three alternate air-casings 19, 3rd cavity 3 and the 5th cavity 5, rotor 12, sealed by sealing device between air-casing 19 and horizontal cylinder housing 20.The bottom of horizontal cylinder housing 20 be mounted with can make described horizontal cylinder housing 20 tilt certain angle, be convenient to heat storage change hydraulic means.
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, rotor 12 is divided into two parts passage, the flow direction of hot and cold air is counter-flow arrangement, and front half period flue gas enters mozzle 15 by the first air inlet pipe 8 and enters rotor 12 through pore 16 enter the first cavity 1, the 3rd cavity 3, the 5th cavity 5 heat storage body through punching baffle plate 13 between three alternate air-casings 19; Air flows through through punching baffle plate 13 heat storage heated in second cavity 2, the 4th cavity 4, the 6th cavity 6 through the inside of air-casing 19 by the second air inlet pipe 10 and absorbs heat; Cooled flue gas is discharged by second exhaust pipe 9, is entered burner provide hot blast by the air heated by downtake pipe 7; Second cycle is when starting, motor rotor driven rotates 60 °, at this moment flue gas enters rotor 12 from the first air inlet pipe 8 between three alternate air-casings 19, flows through that passage that air just now flows through enters the second cavity 2, the 4th cavity 4, the 6th cavity 6 add by air cooled heat storage, and air is entered by the second air inlet pipe 10 and flows through that other passage enters the first cavity 1, the 3rd cavity 3, the 5th cavity 5 absorb the heat storage that flue gas is crossed; Cooled flue gas is discharged by second exhaust pipe 9, and the air after heating counts burner by downtake pipe 7, and realizing provides hot blast continuously.

Claims (6)

1. a horizontal heat-accumulated type high-efficiency heat exchanger, it is characterized in that: the inwall of horizontal cylinder housing (20) is provided with insulating (14), described horizontal cylinder housing (20) inside baffle for separating becomes six equal axial cavity: the first cavity (1), second cavity (2), 3rd cavity (3), 4th cavity (4), 5th cavity (5) and the 6th cavity (6), all heat storage is filled with in described axial cavity, the two ends of described axial cavity are provided with the punching baffle plate (13) being used for fixing heat storage, one end of described horizontal cylinder housing (20) is provided with downtake pipe (7) and the first air inlet pipe (8), the other end is provided with second exhaust pipe (9) and the second air inlet pipe (10), in described horizontal cylinder housing (20), two ends are respectively equipped with a mozzle (15), a mozzle is connected with described the first air inlet pipe (8), mozzle (15) described in another is connected with described second exhaust pipe (9), described mozzle (15) is equipped with the pore (16) with described horizontal cylinder housing (20) inner space, the rotating shaft (11) driven by motor (17) is provided with in described horizontal cylinder housing (20), described rotating shaft (11) is provided with two rotors (12) of connecting corresponding to the two ends of described horizontal cylinder housing (20) respectively, each described rotor (12) is provided with the air-casing (19) of three alternate settings of circumference, the downtake pipe (7) described in the connection of inside of the air-casing (19) of described rotor (12) when a phase place described in three, second air inlet pipe (10) and the axial cavity described in alternate three, described mozzle (15) and another three alternate described axial cavity are connected between three alternate described air-casings (19), described rotor (12) rotates the downtake pipe (7) described in 60 ° of connections of the inside to the air-casing (19) during another phase place described in three, second air inlet pipe (10) and another three alternate described axial cavity, described mozzle (15) the described axial cavity alternate with three is connected between three alternate described air-casings (19), described rotor (12), sealed by sealing device between described air-casing (19) and described horizontal cylinder housing (20).
2. horizontal heat-accumulated type high-efficiency heat exchanger according to claim 1, is characterized in that: the bottom of described horizontal cylinder housing (20) is mounted with can make described horizontal cylinder housing (20) inclination certain angle, be convenient to the hydraulic tilting device of heat storage replacing.
3. horizontal heat-accumulated type high-efficiency heat exchanger according to claim 1 and 2, is characterized in that: described heat storage is divided into according to different flue gas qualities: Ceramic Balls (21) and ceramic honeycomb body (18).
4. horizontal heat-accumulated type high-efficiency heat exchanger according to claim 1 and 2, it is characterized in that: described motor (17) is servomotor, the rotation mode of described motor (17) rotor driven (12) is for swinging back and forth.
5. horizontal heat-accumulated type high-efficiency heat exchanger according to claim 1 and 2, is characterized in that: described first air inlet pipe (8) of flue gas and the described downtake pipe (7) of air are located at described horizontal cylinder housing (20) same to one end.
6. horizontal heat-accumulated type high-efficiency heat exchanger according to claim 1 and 2, is characterized in that: described punching baffle plate (13) is fixed together by bolt and described horizontal cylinder housing (20), convenient disassembly.
CN201210357976.5A 2012-09-24 2012-09-24 Horizontal heat accumulating type efficient heat exchanger Active CN102829485B (en)

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CN113175824B (en) * 2021-04-16 2022-11-22 河北科技大学 Heat accumulating type heating furnace with one-side combustion function and using method thereof

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FR2207267B1 (en) * 1972-11-22 1976-01-30 Bennes Marrel
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JP2001304540A (en) * 2000-04-21 2001-10-31 Nippon Steel Corp Rotary heat-exchanger
KR101185512B1 (en) * 2004-06-28 2012-09-24 가부시키가이샤 다이키샤 Heat storage type gas processing apparatus
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CN201636871U (en) * 2010-03-12 2010-11-17 吴道洪 Heat accumulator rotating heat exchange device and industrial furnace
CN202229224U (en) * 2011-09-08 2012-05-23 林杰 Rotary heat accumulating type heat exchanger
CN202253729U (en) * 2011-09-29 2012-05-30 岳阳钟鼎热工电磁科技有限公司 Continuous heat accumulation type preheater sealing device
CN102645116B (en) * 2012-04-27 2014-04-23 中南大学 Continuous heat accumulating type heat exchanger

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