CN103475268A - Micro-burning electric generating device - Google Patents
Micro-burning electric generating device Download PDFInfo
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- CN103475268A CN103475268A CN2013103965276A CN201310396527A CN103475268A CN 103475268 A CN103475268 A CN 103475268A CN 2013103965276 A CN2013103965276 A CN 2013103965276A CN 201310396527 A CN201310396527 A CN 201310396527A CN 103475268 A CN103475268 A CN 103475268A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/60—Thermal-PV hybrids
Abstract
The invention discloses a micro-burning electric generating device which comprises a first preheating channel, a second preheating channel, a third preheating channel, a fourth preheating channel, a flow stop board, a combustion chamber, thermal photovoltaic electric generating modules and thermoelectricity electric generating modules. One end of the first preheating channel and one end of the third preheating channel are connected, one end of the second preheating channel and one end of the fourth preheating channel are connected, and therefore two U-shaped pipelines are formed and arranged at the two sides of the combustion chamber respectively. The other end of the first preheating channel and the other end of the fourth preheating channel are air inlets. The second preheating channel and the third preheating channel intersect outside an inlet of the combustion chamber. The flow stop board is arranged on the intersecting portion of the third preheating channel and the fourth preheating channel. The thermal photovoltaic electric generating modules are arranged in a high-temperature zone formed between the outer wall of the combustion chamber and the second preheating channel and a high-temperature zone formed between the outer wall of the combustion chamber and the third preheating channel respectively. The thermoelectricity electric generating modules are arranged in a medium-low-temperature zone formed between the first preheating channel and the third preheating channel and a medium-low-temperature zone formed between the second preheating channel and the fourth preheating channel respectively. According to the micro-burning electric generating device, thermal photovoltaic electric generation and thermoelectricity electric generation are combined, energy gradient utilization is achieved, thermal loss is reduced, the electric generating efficiency is improved, the electric generating effect is stable, and the structure is compact, the size is small, the service life is long, and use is flexible.
Description
Technical field
The invention belongs to the miniature scale technical field of power generation, more specifically, relate to a kind of micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT).
Background technology
The various microelectromechanical systemss (MEMS) that continue to bring out, as portable electric appts such as microrobot, microsensor and mobile phones, the characteristics such as require that its dynamical system possesses that volume is little, lightweight, energy density is large and easy to use.There are the shortcomings such as weight is large, energy density is little, service time is short, the charging interval is long in traditional chemical cell, can not be competent at the demand of this respect fully; And the energy density of hydrogen and hydrocarbon fuel gas is higher tens times than chemical cell.Therefore, the microminiature electricity generation system based on burning, the micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), have the great potential of competing with chemical cell, caused domestic and international researcher's extensive concern.
The mode of micro-combustion generating mainly contains two kinds of the generating of thermo-optical volt and thermoelectric power generations.Thermo-optical volt generating is to utilize the photovoltaic effect of interface and a kind of technology of thermal radiation directly being changed into to electric energy.The thermoelectricity conversion is the direct generation mode of most convenient.Its principle is thermoelectric effect, and, when the two ends of electrothermal module temperature is unequal, move to low-temperature space the electronics in material or Hui You high-temperature region, hole, thus generation current or electric charge accumulation.Thermoelectric conversion system consists of thermal source, low-temperature receiver and electrothermal module.
Yet, the hyperthermia radiation energy that the generating of thermo-optical volt can only utilize the burner wall to send, the energy of middle low temperature part can't utilize.Thermoelectric power generation is because the thermoelectric material cold junction need maintain low temperature and could effectively generate electricity, and the technology of existing maintaining heat electric material cold junction low temperature has: passive type, strengthen heat radiation as the assembling metal fin, and increased device volume and effect limited; Active, drive cold air or cold water to take away heat, consumption additional energy and thermal losses are large.At present, can't effective cooling due to the thermoelectric material cold junction, thermopower generation efficiency is generally lower, only has 1% left and right.In addition, high temperature thermoelectric material cost is high at present, unstable properties, the energy of low-temperature space during generally seldom application, so thermoelectric power generation generally can only utilize.Although the device in conjunction with thermo-optical volt electricity generating principle and thermoelectric power generation principle is arranged at present, only for both simple superposition, loosely organized, the heat loss problem is not improved, and the cooling problem of thermoelectric generation module cold junction still exists.
In addition, in the micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), the stability of flame is another problem that needs emphasis to consider.This is because in micro-combustor, the ratio of and volume long-pending due to combustor surface, it is face body ratio, want large two to three orders of magnitude with respect to conventional yardstick, make the ratio of the heat loss due to radiation by wall greatly increase, the probability of catching of the burned locular wall face of the free radical of chemical reactions at the same time also increases greatly, therefore, the flame holding variation, easily occur flame-out.In addition, the combustion chamber physical dimension is too little, and the admixture of gas time of staying therein is short, and fuel gas and combustion-supporting gas often have little time complete reaction and just be blown combustion chamber, not only cause combustion efficiency to reduce, and the blow-off limit of fuel gas is also dwindled greatly with steady combustion scope.
Summary of the invention
Above defect or Improvement requirement for prior art, the invention provides a kind of micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its purpose is by the shape to its key component, size and set-up mode thereof are designed, can effectively solve thermo-optical volt Blast Furnace Top Gas Recovery Turbine Unit (TRT) in existing micro-combustion generation technology can't utilize in the low-temperature space energy, thermoelectric generation module can only utilize in low-temperature space energy and cold junction cooling technology increase volume or consume additional energy, flame holding is poor, flame-out problem easily occurs, can improve generating efficiency and power generation stabilization simultaneously, increase the service life, dwindle the Blast Furnace Top Gas Recovery Turbine Unit (TRT) size.
For achieving the above object, the invention provides a kind of micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) of burning capacity cascade utilization, comprise first to fourth preheating channel, combustion chamber, flow-stopping plate, first, second thermo-optical volt electricity generation module, and first, second thermoelectric generation module; Described the first, the 3rd preheating channel one end is connected, form U-shaped pipeline, described the second, the 4th preheating channel one end is connected, form U-shaped pipeline, the U-shaped pipeline of two covers is separately positioned on the both sides, combustion chamber, and first, second preheating channel other end is air inlet, for passing into fuel gas, combustion-supporting gas or its mist, three, the 4th preheating channel other end meets at outside entry of combustion chamber, and described flow-stopping plate is arranged on the 3rd, the 4th preheating channel intersection, for gas is imported to combustion chamber; First, second thermo-optical volt electricity generation module is separately positioned on the high-temperature region formed between combustion chamber and the 3rd, the 4th preheating channel, and first, second thermoelectric generation module is separately positioned between the first, the 3rd preheating channel and the middle low-temperature space formed between the second, the 4th preheating channel.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its combustion chamber is divided into end to end three sections successively from function, and first paragraph is as entrance, and second segment is as stable burning cavity, and the 3rd section as the after-flame chamber.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its stable burning cavity specific implementation be: the entrance section width that defines described combustion chamber is W, the second segment cross-sectional width of described combustion chamber is W ', meet W ' > W, make in the second segment of combustion chamber and form the low speed recirculating zone with this, play steady combustion effect.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its entry of combustion chamber cross-sectional width W, combustion chamber stable burning cavity cross-sectional width W ', stable burning cavity length L meet the value of 2L/ (W '-W) between 1 to 4.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), the end that its combustion chamber stable burning cavity is connected with the after-flame chamber is processed into lead angle, for guiding the gas in stable burning cavity, enters the after-flame chamber.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), the link cross section of the entrance of its combustion chamber and stable burning cavity narrows down gradually along gas flow direction, is formed for the horn-like interface channel of auxiliary steady combustion.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), the cross-sectional width of its horn-like interface channel and stable burning cavity junction, combustion chamber and the ratio of entry of combustion chamber cross-sectional width are between 0.4 to 0.7.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its first to fourth preheating channel, combustion chamber are plate.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), all be furnished with reinforced heat exchanger in its first to fourth preheating channel.
Preferably, described micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), its reinforced heat exchanger is fin.
The present invention has the following advantages:
One, the present invention is owing to combining the generating of thermo-optical volt and two kinds of generation modes of thermoelectric power generation, can utilize temperature to surpass the high-temperature region energy of 600 ℃, also can utilize the middle low-temperature space energy of temperature between 100 ℃ to 600 ℃, realize the cascade utilization of combustion heat energy, relatively any single generation mode efficiency is all higher; Utilize the dispersed heat preheating due to gas in preheating channel, reduced the heat loss, also improved generating efficiency; Utilization enters first, the gas of the 3rd preheating channel is to the electrothermal module cold-side cooling, has improved the generating efficiency of electrothermal module.Comprehensive above 3 points, a kind of micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention can effectively improve generating efficiency.Its two, the present invention, due to the mode preheating gas that adopts thermal cycle, has improved flame holding, thereby has improved the power generation stabilization of micro-combustion device; The present invention adopts the thermal cycle mode to solve the cooling problem of electrothermal module cold junction simultaneously, has improved the power generation stabilization of electrothermal module.Comprehensive the present invention has improved the stability of energy release and two links of power conversion, has therefore improved power generation stabilization.Its three, the present invention does not have rotatable parts, without wearing and tearing, noiselessness, thermo-optical volt electricity generation module absorbs the amount of heat generating, and the residing ambient temperature of thermoelectric generation module is reduced, and prevents that thermoelectric generation module is because of overheated accelerated ageing, so long service life.Its four, electrothermal module cold junction cooling means does not increase additional volumes, so compact conformation of the present invention, plant bulk is little, is applicable to the even micron-sized micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) of grade.Its five, the present invention has two air inlets, both has been applicable to premixed combustion, is applicable to again non-premixed combustion, depending on real needs, determines combustion mode, flexibly applicable.
As optimization, micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention, be provided with stable burning cavity in described combustion chamber, and the cross-sectional width of described stable burning cavity is wider than described entry of combustion chamber width, can in described stable burning cavity, can form the low speed recirculating zone, thereby improve flame combustion stability.
As optimization, micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention, the end that described entry of combustion chamber is connected with described stable burning cavity forms horn-like passage, can play the effect of auxiliary steady combustion, thereby further improve flame holding.
As optimization, micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention, lead angle is processed in described combustion chamber stable burning cavity and junction, after-flame chamber, guarantees that gas communication is smooth and easy, and heat loss is evenly distributed, and avoids local overheating.
As optimization, micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention, described first to fourth preheating channel, combustion chamber be plate, thereby increased the effective area of thermo-optical volt electricity generation module, thermoelectric generation module, improves generating efficiency.
As optimization, micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention, be furnished with reinforced heat exchanger in described first to fourth preheating channel, as fin.Reinforced heat exchanger can be strengthened exchange heat efficiency, improves gas pre-heat effect and electrothermal module cold junction cooling effect, thereby improves generating efficiency and power generation stabilization.
In general, the above technical scheme of conceiving by the present invention compared with prior art, owing to organically combining thermo-optical volt and two kinds of generation modes of thermoelectricity, formed a compound electricity generation system, and utilized common two kinds of the large recirculating zones steady combustion mode formed of unreacted fuel gas preheating, tubaeform entry of combustion chamber and stable burning cavity to enlarge steady combustion scope, can obtain that generating efficiency is high, power generation stabilization good, size is little, the life-span is long, be suitable for beneficial effect flexibly.
The accompanying drawing explanation
Fig. 1 is the cutaway view of preferred version of the present invention:
Fig. 2 is the structural representation of preferred version of the present invention.
Fig. 3 is that equivalent proportion is 0.5, the outer wall of combustion chamber surface temperature distribution map under various inlet speed.
Fig. 4 is that equivalent proportion is 0.5, the combustion efficiency figure of various inlet speed lower combustion chamber.
Fig. 5 is that intake velocity is 20m/s, different equivalent proportion lower combustion chamber outside wall surface temperature profile.
Fig. 6 is that intake velocity is 20m/s, the combustion efficiency figure of different equivalent proportion lower combustion chamber.
Wherein: 1,2 be respectively first, second air inlet, 3 is boss, 4 is the combustion chamber stable burning cavity, 5,6,7,8 be respectively first to fourth preheating channel, 9,10 are respectively first, second thermo-optical volt electricity generation module, and 11,12 are respectively first, second thermoelectric generation module, 13 is entry of combustion chamber, 14 is flow-stopping plate, and 15 is combustion chamber, and 16 is after-flame chamber, combustion chamber.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition, below in each execution mode of described the present invention involved technical characterictic as long as form each other conflict, just can mutually not combine.
Microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) provided by the invention can be processed and obtain on resistant to elevated temperatures matrix, and basis material can be selected as resistant to elevated temperatures ceramic materials such as quartzy (main component is SiO2), carborundum (SiC), silicon nitrides (Si3N4).
As shown in Figure 1, microminiature thermoelectric generating device provided by the invention comprises first to fourth preheating channel 5,6,7,8, first, second thermo-optical volt electricity generation module 9,10, first, second thermoelectric generation module 11,12, flow-stopping plate 14, combustion chamber 15, first to fourth preheating channels 5,6,7,8 and combustion chamber 15 are plate.
Combustion chamber 15 is divided into three sections, is followed successively by entrance 13, stable burning cavity 4 and after-flame chamber 16.
Be symmetrically arranged with boss 3 in entry of combustion chamber 13, boss is the column structure that bottom surface is right-angled triangle, the entry of combustion chamber sidewall is close in side, one bar right-angle side place, and another right-angle side place lateral vertical and entry of combustion chamber sidewall are used to form the horn-like passage be connected with stable burning cavity.Practice shows, the entry of combustion chamber that boss 3 forms is with the ratio of the cross-sectional width W of stable burning cavity 4 junction cross-sectional width and entry of combustion chamber 13 between 0.4 to 0.7, and steady fuel efficiency fruit is better.
Combustion chamber stable burning cavity 4 can adopt multiple steady combustion means, such as surface passivating treatment, catalytic reaction, formation recirculating zone etc.For ease of processing, preferred version of the present invention adopts the smooth burning method that forms recirculating zone.Particularly, the combustion chamber stable burning cavity is the cavity that cross-sectional width is greater than the entry of combustion chamber width, and in stable burning cavity, both sides form the low speed recirculating zone, thereby plays steady fuel efficiency fruit.Experiment confirms, the value that meets 2L/ (W '-W) when entry of combustion chamber cross-sectional width W, stable burning cavity cross-sectional width W ', stable burning cavity length L is between 1 to 4 the time, and steady fuel efficiency fruit is better.The end that stable burning cavity is connected with the after-flame chamber is provided with lead angle, and guiding gas enters the after-flame chamber, thereby the heat that burning is produced is uniformly distributed.Form two high-temperature regions, place between outer wall of combustion chamber and second, third preheating channel, the high-temperature region temperature is over 600 ℃; The first, form low-temperature space in two places between the 3rd preheating channel and between the second, the 4th preheating channel, middle low-temperature space temperature is between 100 ℃ to 600 ℃.Because the micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) is made the material difference, the temperature range of high-temperature region, middle low-temperature space is slightly different.
The high-temperature region that the first thermo-optical volt electricity generation module 9 forms between outer wall of combustion chamber face and the 3rd preheating channel, the middle low-temperature space that the first thermoelectric generation module 11 forms between the first preheating channel 5 and the 3rd preheating channel 7; The entrance of the first preheating channel 5 is as the first air inlet 1, for passing into fuel gas, combustion-supporting gas or its mixture, the outlet of the first preheating channel 5 is connected with the entrance of the 3rd preheating channel 7, and the entrance of the 3rd preheating channel 7 communicates with the import 13 of combustion chamber 15.
The high-temperature region that the second thermo-optical volt electricity generation module 10 forms between outer wall of combustion chamber face and the 4th preheating channel, the middle low-temperature space that the second thermoelectric generation module 12 forms between the second preheating channel 6 and the 4th preheating channel 8; The entrance of the second preheating channel 6 is as the second air inlet 2, for passing into fuel gas, combustion-supporting gas or its mixture, the outlet of the second preheating channel 6 is connected with the entrance of the 4th preheating channel 8, and the outlet of the 4th preheating channel 8 communicates with the import 13 of combustion chamber 15.
For enhanced heat exchange, can be at the interior layout reinforced heat exchanger of first to fourth preheating channel 5,6,7,8, as fin.
Pass into respectively fuel gas and combustion-supporting gas to the first and second air inlets while adopting non-premixed combustion mode, while adopting the premixed combustion mode, the mist of fuel gas and combustion-supporting gas is passed into to the first and second air inlets.Fuel gas and combustion-supporting gas or their premix are respectively from air inlet 1 and 2 imports 13 that enter plate micro combustor 15 through preheating channel 5,6,7,8, in boss 3 rears and the interior ignition of cavity firing stabilizer 4, high-temperature gas is passed to the first and second thermo-optical volt electricity generation modules 9,10 and the 3rd, the 4th preheating channel 7,8 by the wall of combustion chamber 15 by heat, and tail gas is discharged by combustor exit.Fuel gas and combustion-supporting gas or their premixed flow are when first to fourth preheating channel, and a part of heat of can making burning produce carries out preheating through wall to fuel gas and combustion-supporting gas or their premix gas.Gas temperature in first, second preheating channel 5,6 is lower, is used for the cold junction of cooling electrothermal module 11 and 12.Three, the gas temperature of 7,8 li of the 4th preheating channels is higher, and as the thermal source of electrothermal module 11 and 12, the electromotive force produced by the temperature difference is by electrothermal module 11 and 12 outputs.
Be below specific embodiment:
Adopting the premix gas of hydrogen and air is fuel, and the length of fuel channel is 10mm, is highly 1mm.The resistant to elevated temperatures SiC material of matrix adopting, the density under its normal temperature, thermal capacitance, conductive coefficient and normal emittance are respectively 3217kg/m
3, 2352J/ (kgK), 52.08W/ (m
2k) and 0.9.Apply general CFD software for calculation Fluent6.3.26, result as Fig. 3 to as shown in Fig. 6.
It is 0.5 that Fig. 3 has provided equivalent proportion, the outside wall surface Temperature Distribution of the combustion chamber under various inlet speed, and as seen from the figure, the outer wall temperature integral body of combustion chamber is more even, and mean temperature is higher.Along with the increase of intake velocity, Temperature Distribution only slightly has inhomogeneous, illustrate that boss and firing stabilizer can play well steady fuel efficiency fruit, and higher wall surface temperature more is conducive to the heat that utilizes burning to discharge.
Fig. 4 is that equivalent proportion is 0.5, the combustion efficiency under various inlet speed, as shown in Figure 4, the combustion efficiency under various inlet speed is all very high, particularly when intake velocity hour, combustion efficiency is all higher than 90%.This is because boss and firing stabilizer can extend the fuel gas time of staying on the one hand, can provide resident place for reacting required crucial group on the other hand, makes it can play well steady fuel efficiency fruit.
Fig. 5 is that intake velocity is 20m/s, and the outer wall of combustion chamber temperature under different equivalent proportions distributes, and as shown in Figure 5, the outer wall temperature under each equivalent proportion distributes all more even, and the mean wall surface temperature raises along with the increase of equivalent proportion.In the patient temperature range of material, wall temperature is higher, to the utilization of heat energy, is more favourable.
Fig. 6 is that intake velocity is 20m/s, the combustion efficiency of the combustion chamber under different equivalent proportions.As shown in Figure 6, the combustion efficiency under each equivalent proportion is all very high, and combustion efficiency increases along with the increase of equivalent proportion.
This combustion chamber of above explanation can make the combustion case under each working condition good, and this combustion chamber can provide for Blast Furnace Top Gas Recovery Turbine Unit (TRT) the thermal source of stability and high efficiency.These heat energy lie prostrate with two kinds of modes of thermoelectricity and carry out cascade utilization by thermo-optical, can export any single larger power of mode of specific heat photovoltaic or thermoelectricity.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT), is characterized in that, comprises first to fourth preheating channel, combustion chamber, flow-stopping plate, first, second thermo-optical volt electricity generation module, and first, second thermoelectric generation module; Described the first, the 3rd preheating channel one end is connected, form U-shaped pipeline, described the second, the 4th preheating channel one end is connected, form U-shaped pipeline, the U-shaped pipeline of two covers is separately positioned on the both sides, combustion chamber, and first, second preheating channel other end is air inlet, for passing into fuel gas, combustion-supporting gas or its mist, three, the 4th preheating channel other end meets at outside entry of combustion chamber, and described flow-stopping plate is arranged on the 3rd, the 4th preheating channel intersection, for gas is imported to combustion chamber; First, second thermo-optical volt electricity generation module is separately positioned on the high-temperature region formed between combustion chamber and the 3rd, the 4th preheating channel, and first, second thermoelectric generation module is separately positioned between the first, the 3rd preheating channel and the middle low-temperature space formed between the second, the 4th preheating channel.
2. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 1, is characterized in that, described combustion chamber is divided into end to end three sections successively from function, and first paragraph is as entrance, and second segment is as stable burning cavity, and the 3rd section as the after-flame chamber.
3. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 2, it is characterized in that, described stable burning cavity specific implementation be: the entrance section width that defines described combustion chamber is W, the second segment cross-sectional width of described combustion chamber is W ', meet W ' > W, make in the second segment of combustion chamber and form the low speed recirculating zone with this, play steady combustion effect.
4. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 3, is characterized in that, described entry of combustion chamber cross-sectional width W, combustion chamber stable burning cavity cross-sectional width W ', stable burning cavity length L meet the value of 2L/ (W '-W) between 1 to 4.
5. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 3, is characterized in that, the end that the stable burning cavity of described combustion chamber is connected with the after-flame chamber is processed into lead angle, for guiding the gas in stable burning cavity, enters the after-flame chamber.
6. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as described as claim 2 to 5 any one, is characterized in that, the link cross section of the entrance of described combustion chamber and stable burning cavity narrows down gradually along gas flow direction, is formed for the horn-like interface channel of auxiliary steady combustion.
7. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 6, is characterized in that, the cross-sectional width of described horn-like interface channel and stable burning cavity junction, combustion chamber and the ratio of entry of combustion chamber cross-sectional width are between 0.4 to 0.7.
8. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 1, is characterized in that, described first to fourth preheating channel, combustion chamber are plate.
9. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 1, is characterized in that, in described first to fourth preheating channel, all is furnished with reinforced heat exchanger.
10. micro-combustion Blast Furnace Top Gas Recovery Turbine Unit (TRT) as claimed in claim 9, is characterized in that, described reinforced heat exchanger is fin.
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