WO2015194365A1 - 輻射熱回収形ヒータと、それを用いたスターリングエンジンおよび焼却炉 - Google Patents
輻射熱回収形ヒータと、それを用いたスターリングエンジンおよび焼却炉 Download PDFInfo
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- WO2015194365A1 WO2015194365A1 PCT/JP2015/065917 JP2015065917W WO2015194365A1 WO 2015194365 A1 WO2015194365 A1 WO 2015194365A1 JP 2015065917 W JP2015065917 W JP 2015065917W WO 2015194365 A1 WO2015194365 A1 WO 2015194365A1
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- passage
- container
- radiant heat
- heat recovery
- heat transfer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
- F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2254/00—Heat inputs
- F02G2254/15—Heat inputs by exhaust gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2254/00—Heat inputs
- F02G2254/20—Heat inputs using heat transfer tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2254/00—Heat inputs
- F02G2254/50—Dome arrangements for heat input
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2255/00—Heater tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2255/00—Heater tubes
- F02G2255/10—Heater tubes dome shaped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/06—Steam superheating characterised by heating method with heat supply predominantly by radiation
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Definitions
- the present invention relates to a radiant heat recovery heater, a Stirling engine using the radiant heat recovery heater as a high temperature side heat exchanger, and an incinerator configured to recover heat by the radiant heat recovery heater.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a radiant heat recovery type heater capable of improving heat exchange performance, a Stirling engine and an incinerator using the same.
- the radiant heat recovery type heater has a small-diameter mounting pitch circle of one passage when a plurality of heat transfer tubes having a forward path and a return path of a heat medium are arranged in a heater mounting portion.
- Radiation heat recovery in which each of the heat transfer tubes absorbs the radiant heat from the container by making the mounting pitch circle of the other passage large in diameter and storing them in the container and exposing the container to a high temperature.
- Each of the heat transfer tubes is disposed in the mounting portion at equal pitch angles with one passage and the other passage, and one passage is a projection surface of the other passage from the container toward the center of the container. So as not to completely overlap with the pitch angle of the other passage by a predetermined angle.
- the one passage may be arranged in the mounting portion at a position shifted by half the pitch angle with respect to the other passage.
- the radiant heat recovery type heater has a small-diameter mounting pitch circle of one passage when a plurality of heat transfer tubes having a forward path and a return path of a heat medium are arranged in a heater mounting portion.
- Radiation heat recovery in which each of the heat transfer tubes absorbs the radiant heat from the container by making the mounting pitch circle of the other passage large in diameter and storing them in the container and exposing the container to a high temperature.
- the radiant heat recovery heater may be a container filled with an inert gas.
- the radiant heat recovery type heater may be provided with an inert gas supply path for supplying an inert gas into the container.
- the radiant heat recovery type heater may use helium as an inert gas.
- the radiant heat recovery type heater may be one in which the inside of the container is sealed and the inside of the container can be maintained at a pressure higher than atmospheric pressure when exposed to a high temperature.
- the radiant heat recovery type heater may be provided with a pressure regulating valve.
- a Stirling engine according to the present invention for solving the above-mentioned problems uses the radiant heat recovery type heater as a high-temperature side heat exchanger.
- the radiant heat recovery type heater is provided so as to be exposed to an empty space in the furnace where heat can be recovered.
- each of the heat transfer tubes has one passage and the other passage arranged in the mounting portion at equal pitch angles, and the one passage extends from the container to the container. Since it is arranged in the mounting portion at a position deviated from the pitch angle of the other passage by a predetermined angle so as not to completely overlap with the projection surface of the other passage toward the center, the heat radiation container to one passage It is possible to prevent the radiant heat from being blocked by the other passage. Therefore, the amount of direct heat transfer from the container to each heat transfer tube can be improved.
- the improvement of the direct heat transfer amount described above is maximized by arranging the one passage with respect to the other passage at a position shifted by half the pitch angle. To the limit.
- the one passage and / or the other passage of each heat transfer tube is flattened or extended along the projection plane so that a projected area from the container toward the center of the container is enlarged. Since the elliptical processed part is formed, the amount of direct heat transfer from the container to each of the transfer pipes can be improved as compared with the case where the processed part is not formed.
- the fourth aspect of the present invention by filling the container in which the heat transfer tubes are stored with an inert gas, high temperature oxidation of the heat transfer tubes can be suppressed and protected, and the durability of the heat transfer tubes can be improved. Can be achieved. Further, according to the present invention, the air in the container can be easily replaced with the inert gas by providing the inert gas supply path for supplying the inert gas into the container.
- the sixth aspect of the present invention by using helium as the inert gas, not only high-temperature oxidation of the heat transfer tube can be suppressed, but also the amount of natural convection heat transfer in the container can be increased, and the durability of the heat transfer tube And heat transfer efficiency can be improved.
- the inside of the container can be maintained at a pressure higher than the atmospheric pressure.
- the amount of natural convection heat transfer in the container can be increased, and the durability of the heat transfer tube and the heat transfer efficiency can be improved. Further, according to the present invention described in claim 8, it is possible to prevent the internal pressure from becoming too high.
- the amount of heat recovered from the high temperature side heat exchanger can be improved by using the radiant heat recovery type heater as a high temperature side heat exchanger.
- the waste heat in the incinerator can be efficiently recovered by providing the radiant heat recovery type heater so as to be exposed to an empty space in the furnace where heat can be recovered. Become.
- FIG. 1 is a fragmentary sectional view of an incinerator which shows the state where the Stirling engine which has a radiant heat recovery type heater concerning the present invention was installed in the incinerator. It is a fragmentary end view which shows the state which installed the Stirling engine which has a radiant heat recovery type heater which concerns on this invention in the incinerator. It is the II sectional view taken on the line in FIG. It is sectional drawing explaining the other projection surface in FIG. (A) is a partial end view showing another embodiment of a radiant heat recovery type heater according to the present invention, (b) is a partial cross-sectional view thereof, (c) and (d) are still other parts of FIG. It is a fragmentary sectional view showing an embodiment.
- FIG. 1 is a partial end view showing still another embodiment of a radiant heat recovery type heater according to the present invention
- (b) is a partial sectional view thereof
- (c) and (d) are still other parts of FIG. It is a fragmentary sectional view showing an embodiment.
- (A) is a partial end view showing an installation state according to another embodiment of the radiant heat recovery type heater according to the present invention
- (b) is a sectional view taken along line II-II in FIG.
- FIG. is a partial end view showing an installation state according to still another embodiment of the radiant heat recovery type heater according to the present invention
- (b) is a sectional view taken along line III-III in FIG.
- FIG. 1 shows a state in which a Stirling engine 10 having a radiant heat recovery type heater 1 is installed in an incinerator 2
- FIG. 2 shows a portion of the Stirling engine 10 in the incinerator 2
- FIG. 3 shows radiant heat in the Stirling engine 10. The principal part of the recovery type heater 1 is shown.
- a plurality of U-shaped heat transfer tubes 12 are arranged radially on the attachment portion 11 of the heater 1, and these are accommodated in a container 13, and the container 13 is exposed to a high temperature.
- the U-shaped heat transfer tube 12 absorbs radiant heat from the container 13.
- the mounting part 11 is formed in a disk shape.
- a cylinder head on the high temperature side of the Stirling engine 10 is configured.
- a plurality of U-shaped heat transfer tubes 12 are arranged radially from the center C of the attachment portion 11.
- the U-shaped heat transfer tube 12 is a heat transfer tube bent in a U shape, and has a forward path and a return path for the heat medium.
- the mounting pitch circle of one passage 121 is formed with a small diameter
- the mounting pitch circle of the other passage 122 is formed with a large diameter.
- the U-shaped heat transfer tubes 12 are provided in the circumferential direction of the attachment portion 11 at equal pitch angles ⁇ .
- one passage 121 on the inner diameter side has an angle 1 / half of the pitch angle ⁇ so that it does not completely overlap with the projection surface 122A of the other passage 122 from the outer peripheral side where the container 13 is located toward the center C.
- the mounting portion 11 is disposed at an angle ⁇ shifted by 2 ⁇ from the position where the other passage 122 is disposed.
- the container 13 is formed in a bottomed cylindrical shape capable of accommodating all the U-shaped heat transfer tubes 12 arranged radially, and the U-shaped heat transfer tubes 12 are accommodated in the container 13.
- a gap is formed between the peripheral edge of the opening of the container 13 and the mounting portion 11. That is, since the container 13 is exposed to a high temperature, the temperature difference between the container 13 and the container 13 when not in use is severe. If the mounting portion 11 and the container 13 are strictly fixed, the container 13 is exposed to a high temperature during use. At this time, the inside of the container 13 becomes a high pressure, resulting in thermal distortion and causing damage to the container 13.
- the container 13 is made of a metal such as stainless steel, a material having excellent heat resistance such as ceramics or cermet.
- the radiant heat recovery heater 1 formed in this way is used as a heat exchanger on the high temperature side of the Stirling engine 10.
- the Stirling engine 10 is not particularly limited as long as the heat recovered from the radiant heat recovery type heater 1 can be used as a high temperature side heat source of the Stirling engine 10.
- Various Stirling engines 10 corresponding to the amount of heat recovered from 1 are used.
- the incinerator 2 is configured such that the combustion gas generated when the incineration object is burned becomes high temperature, passes through the incinerator 2, and is exhausted from the flue through desulfurization, dust removal, and the like. ing.
- the Stirling engine 10 described above is a portion through which the combustion gas having a high temperature passes, for example, from an opening 211 a provided in the side wall 211 of the secondary incinerator 21, the radiant heat recovery type heater 1 of the Stirling engine 10.
- the portion of the container 13 is inserted, the opening portion 211 a is closed by the flange portion 131 of the container 13, and the portion of the container 13 of the radiant heat recovery heater 1 is exposed to the empty space 210 in the secondary incinerator 21. It is done.
- the position where the Stirling engine 10 is provided is not limited to the side wall portion 211 in the secondary incinerator 21 as long as the combustion gas in the incinerator 2 passes through at a high temperature.
- the radiant heat recovery type heater 1 can be exposed to an empty space at a high temperature in the incinerator 2 such as a ceiling in the secondary incinerator 21 or a furnace exit flue, etc. It is not limited.
- the radiant heat recovery heater 1 exposed to the empty space 210 in the secondary incinerator 21 is the secondary of the incinerator 2.
- the container 13 is entirely heated by receiving the incineration heat in the incinerator 21, and the U-shaped heat transfer tube 12 housed in the container 13 is heated by the radiant heat from the container 13.
- the U-shaped heat transfer tube 12 is arranged in the attachment portion 11 at a position of an angle ⁇ obtained by shifting one passage 121 on the inner diameter side from the arrangement position of the other passage 122 by an angle 1 ⁇ 2 ⁇ that is half the pitch angle ⁇ .
- the projection surface 122A of the other passage 122 from the container 13 toward the center C is not completely overlapped with the one passage 121 on the inner diameter side, so that the radiant heat from the container 13 to the one passage 121 is
- the entire U-shaped heat transfer tube 12 can receive the radiant heat uniformly without being blocked by the passage 122.
- the heat exchange efficiency by the radiant heat recovery heater 1 is improved, and it is also possible to prevent the radiant heat from concentrating only on a part of the U-shaped heat transfer tube 12, thereby preventing a heat spot, so that the durability of the U-shaped heat transfer tube 12 is also improved. Can be increased.
- the one passage 121 on the inner diameter side is particularly configured as described above.
- the present invention is not limited to the configuration in which the mounting portion 11 is arranged at a position shifted from the arrangement position of the other passage 122 by an angle ⁇ that is half of the pitch angle ⁇ , and at a position shifted by a slight angle ⁇ .
- path 121 in the attachment part 11 may be sufficient.
- one passage 121 is configured not to completely overlap with the projection surface 122A of the other passage 122 that extends from the container 13 toward the center C.
- the projection surface 122B of the other passage 122 that converges toward the center C from the projection surface 122B may not be completely overlapped. That is, the periphery of the container 13 is circular, and heat is not radiated from one direction, but heat is radiated uniformly from the circumferential direction. Therefore, even if the one passage 121 overlaps the projection surface 122A of the other passage 122 from the container 13 toward the center C, the projection of the other passage 122 that converges from the container 13 toward the center C.
- the one passage 121 has a point 121 ⁇ / b> R where the straight line connecting the center C and the center 121 ⁇ / b> C of the one passage 121 is in contact with the outer periphery of the one passage 121. Therefore, considering the absorption of radiant heat, it is preferable to set the offset angle ⁇ so that the point 121R does not overlap the projection surface 122A of the other passage 122 from the container 13 toward the center C, and more preferably. As shown in FIG. 4, it is preferable to set the angle ⁇ to be shifted so that this point 121R does not overlap the projection surface 122B of the other passage 122 that converges from the container 13 toward the center C.
- the adjustment width is reduced. Even in such a case, if the one passage 121 on the inner diameter side is shifted from the arrangement position of the other passage 122 by an angle ⁇ that is half the ⁇ of the pitch angle ⁇ , Since the overlap between the projection surface 122B of the other passage 122 that converges toward C and the one passage 121 on the inner diameter side can be minimized, the structure considering absorption of radiant heat is most preferable.
- the U-shaped heat transfer tube 12 has the attachment portion 11 at a position where one passage 121 on the inner diameter side is shifted from the arrangement position of the other passage 122 by an angle ⁇ which is half 1 ⁇ 2 ⁇ of the pitch angle ⁇ . If the projection planes 122A and 122B of the other passage 122 do not overlap with the one passage 121 on the inner diameter side, the angle ⁇ to be shifted is changed. There may be.
- FIG. 5 shows another embodiment of the radiant heat recovery heater 1 according to the present invention. That is, in this radiant heat recovery type heater 1, a processed part 123 formed flat or oval is formed in one passage 121 on the inner diameter side of the U-shaped heat transfer tube 12, and the projection of one passage 121 from the container 13 toward the center C is projected.
- the area 121 ⁇ / b> A is enlarged to the projected area 123 ⁇ / b> A of the processing unit 123 that goes from the container 13 toward the center C.
- the projection area 123A of the processing unit 123 can absorb a large amount of radiant heat by processing the projection area 121A of the one passage 121 into a flat shape or an ellipse so that the heat exchange efficiency is increased. Can be improved.
- the one passage 121 on the inner diameter side of the U-shaped heat transfer tube 12 does not overlap with the projection surface 122A of the other passage 122 from the container 13 toward the center C.
- the projected area 121A of the one passage 121 that can absorb radiant heat is expanded to the projected area 123A of the processing portion 123. Therefore, as shown in FIG. 6, even if one passage 121 of the U-shaped heat transfer tube 12 is not displaced from the arrangement position of the other passage 122 and is attached at the same pitch angle ⁇ , Compared with the case where the structure is not processed into a flat shape or an ellipse, the effect of absorbing radiant heat is increased.
- the U-shaped heat transfer tube 12 forms a processing portion 123 in the one passage 121 of the U-shaped heat transfer tube 12 by shifting one passage 121 with respect to the other passage 122.
- the processing part 123 may be formed in the other passage 122 (FIG. 5C), or the processing parts 123, 123 are formed in both of them. It may be a thing (FIG.5 (d)).
- a processing portion 123 may be formed in one passage 121 of the U-shaped heat transfer tube 12 without shifting one passage 121 with respect to the other passage 122 (see FIG. 6). 6 (b)), or the processing portion 123 may be formed in the other passage 122 (FIG. 6 (c)), or the processing portions 123, 123 may be formed in both of them. (FIG. 6 (d)).
- the heater of the said Example was comprised as the radiant-heat recovery type
- the present invention can be applied to a heater of a type in which a heat transfer tube directly transfers heat with gas instead of a radiation type. Moreover, it can be applied not only for heat recovery but also for heat dissipation (that is, for cooling).
- the container 13 when configured as the radiant heat recovery type heater 1 covered with the container 13, from the viewpoint of further corrosion prevention, the container 13 may be filled with an inert gas.
- FIG. 7 shows the radiant heat recovery type heater 1 in which an inert gas supply pipe 14 for supplying an inert gas is provided in the space in the container 13 from the gap between the container 13 and the mounting portion 11.
- the inert gas supply pipe 14 is configured to fill the space in the container 13 with an inert gas from a cylinder or the like by opening and closing the valve 14a.
- the inert gas supply pipe 14 supplies the inert gas.
- the opening may be provided so as to face the gap between the container 13 and the attachment part 11, or may be extended into the container 13 from there.
- the inert gas supply pipe 14 is made of a material such as stainless steel so that it can withstand the radiant heat from the container 13.
- inert gas to be used examples include rare gases such as helium and argon, gases having low reactivity such as nitrogen gas and carbon dioxide gas, and mixed gases thereof.
- the space in the container 13 provided with the U-shaped heat transfer pipe 12 is filled with the inert gas from the inert gas supply pipe 14, and the container 13 If the air inside is replaced with an inert gas, the U-shaped heat transfer tube 12 in the container 13 is protected by high-temperature oxidation suppression by the inert gas, and the durability of the U-shaped heat transfer tube 12 is improved. Will be improved.
- the U-shaped heat transfer tube 12 in the container 13 can also improve the heat transfer amount by natural convection, and the heat transfer amount is about three times less than that of air.
- the heat exchange performance of the radiant heat recovery heater 1 can be improved.
- the container 13 is configured as an open system having a gap with the mounting portion 11, so that the atmospheric pressure can be maintained even when the temperature of the container 13 rises.
- a closed system configuration may be used so that the inside of the container 13 can be pressurized.
- the container 13 is sandwiched and fixed in the gap between the container 13 and the mounting portion 11 via the heat-resistant and pressure-resistant gasket 3 or the like so that the container 13 is not damaged by the thermal strain due to the temperature change.
- a pressure adjusting valve 15a is provided in the pipe 15 provided in the mounting portion 11 so that the internal pressure in the container 13 can be adjusted.
- the inert gas By supplying the inert gas from the inert gas supply pipe 14 into the container 13 after decompressing the inside of the container 13 from the supply pipe 14 or the pipe 15 or a dedicated pipe (not shown) provided elsewhere,
- the container 13 may be filled with an inert gas.
- the inside of the container 13 whose internal pressure has been increased by the inert gas not only protects the U-shaped heat transfer tube 12 by suppressing high-temperature oxidation described above.
- the amount of heat transfer by natural convection can be improved. Therefore, when helium gas is used as the inert gas, as shown in FIG. 9, the inside of the container 13 is constituted by an open system and is about 1.5 times or more than when the container 13 is filled with helium gas.
- the amount of heat transfer can be improved. This means that the heat transfer amount can be improved by about 5 times compared to the case where the inside of the container 13 is constituted by an open system and the container 13 is filled with air.
- both the improvement of the natural convection heat transfer amount by the helium gas and the improvement of the natural convection heat transfer amount by the configuration of the closed vessel 13 can be obtained. It is possible to further improve the natural convection heat transfer amount.
- the durability of the U-shaped heat transfer tube 12 can be improved and the amount of heat transfer by natural convection can be improved. Durability and heat recovery efficiency are improved, and the Stirling engine 10 and the incinerator 2 using the durability can improve the output.
- the inert gas can be achieved even if the number of U-shaped heat transfer tubes 12 provided in the container 13 is reduced.
- the radiant heat recovery type heater 1 can be downsized, and the Stirling engine 10 using the same can be downsized in the same manner.
- the incinerator 2 using the Stirling engine 10 can reduce the size of the radiant heat recovery type heater 1 of the Stirling engine 10, so that it can be installed even in a limited empty space 240. It becomes.
- the radiant heat recovery type heater 1 is provided with the U-shaped heat transfer tube 12 in the container 13, but the shape, number and arrangement structure are not particularly limited, and this kind of Various heat transfer tubes employed in the radiant heat recovery heater 1 can be used. Therefore, the U-shaped heat transfer tube 12 shown in FIGS. 7 and 8 may be formed in various shapes as shown in FIGS. 5 and 6.
- the U-shaped heat transfer tube 12 shown in FIGS. 7 and 8 has a position at an angle ⁇ in which one passage 121 on the inner diameter side is shifted from the arrangement position of the other passage 122 by an angle 1 ⁇ 2 ⁇ that is half the pitch angle ⁇ .
- the pitch angle ⁇ between one passage 121 and the other passage 122 is not shifted as shown in FIGS. 10 and 11. It may be arranged in. Even in this case, the effect of filling the inert gas in the container 13 can be obtained, so that the durability of the U-shaped heat transfer tube 12 and the heat transfer efficiency can be improved.
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- General Engineering & Computer Science (AREA)
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Abstract
Description
10 スターリングエンジン
11 取付け部
12 U字伝熱管
121 一方の通路
122 他方の通路
122A 投影面
123 加工部
123A 投影面
13 容器
14 不活性ガス供給管(不活性ガス供給経路)
15a 圧力調整弁
2 焼却炉
210 空スペース
θ ピッチ角度
α 角度
Claims (10)
- 熱媒体の往路と復路を有する伝熱管がヒータの取付け部に複数個配置されるに当って一方の通路の取付けピッチ円を小径とし、他方の通路の取付けピッチ円を大径とし、これらが容器内に収められ、容器が高温に露呈されることで、当該容器からの輻射熱を各伝熱管が吸収するようになされた輻射熱回収形ヒータであって、
各伝熱管は、一方の通路および他方の通路が等間隔のピッチ角度で取付け部に配置され、一方の通路は、容器から当該容器の中心に向かう他方の通路の投影面と完全重複しないように、所定角度だけ他方の通路のピッチ角度からずれた位置で取付け部に配置されてなることを特徴とする輻射熱回収形ヒータ。 - 他方の通路に対して一方の通路は、ピッチ角度の半分の角度分ずれた位置で取付け部に配置されてなる請求項1記載の輻射熱回収形ヒータ。
- 熱媒体の往路と復路を有する伝熱管がヒータの取付け部に複数個配置されるに当って一方の通路の取付けピッチ円を小径とし、他方の通路の取付けピッチ円を大径とし、これらが容器内に収められ、容器が高温に露呈されることで、当該容器からの輻射熱を各伝熱管が吸収するようになされた輻射熱回収形ヒータであって、
各伝熱管の一方の通路および/または他方の通路は、容器から当該容器の中心に向かう投影面積が拡大するように、当該投影面に沿って拡大した扁平または楕円の加工部が形成されていることを特徴とする輻射熱回収形ヒータ。 - 容器内に不活性ガスが充填されてなる請求項1記載の輻射熱回収形ヒータ。
- 容器内に不活性ガスを供給するための不活性ガス供給経路が設けられてなる請求項4記載の輻射熱回収形ヒータ。
- 不活性ガスとしてヘリウムを用いる請求項4または5記載の輻射熱回収形ヒータ。
- 容器内が密閉され、容器を高温に露呈した際に容器内を大気圧よりも高圧に保持することができるようになされたことを特徴とする請求項4または5記載の輻射熱回収形ヒータ。
- 圧力調整弁が設けられてなる請求項7記載の輻射熱回収形ヒータ。
- 請求項1ないし5の何れか一に記載の輻射熱回収形ヒータを高温側熱交換器とするスターリングエンジン。
- 請求項1ないし5の何れか一に記載の輻射熱回収形ヒータが、炉内の熱回収可能な空スペースに露呈するように設けられた焼却炉。
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CN201580033078.6A CN106460724B (zh) | 2014-06-20 | 2015-06-02 | 辐射热回收型加热器以及使用了该辐射热回收型加热器的斯特林发动机和焚烧炉 |
KR1020167034301A KR101937551B1 (ko) | 2014-06-20 | 2015-06-02 | 복사열 회수형 히터와, 그것을 사용한 스터링 엔진 및 소각로 |
US15/319,809 US10422300B2 (en) | 2014-06-20 | 2015-06-02 | Radiant heat recovery heater, and stirling engine and combustion furnace using radiant heat recovery heater |
EP15810616.1A EP3159520B1 (en) | 2014-06-20 | 2015-06-02 | Radiant heat recovery heater, and stirling engine and combustion furnace using radiant heat recovery heater |
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JP2014-126862 | 2014-06-20 | ||
JP2014126862A JP6318020B2 (ja) | 2014-06-20 | 2014-06-20 | 輻射熱回収形ヒータと、それを用いたスターリングエンジンおよび焼却炉 |
JP2014126861A JP6378944B2 (ja) | 2014-06-20 | 2014-06-20 | 輻射熱回収形ヒータと、それを用いたスターリングエンジンおよび焼却炉 |
JP2014-126861 | 2014-06-20 |
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EP (1) | EP3159520B1 (ja) |
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CN111609747A (zh) * | 2020-04-26 | 2020-09-01 | 宁夏钢铁(集团)有限责任公司 | 一种回收破损铁水罐余热系统 |
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2015
- 2015-06-02 CN CN201580033078.6A patent/CN106460724B/zh active Active
- 2015-06-02 EP EP15810616.1A patent/EP3159520B1/en not_active Not-in-force
- 2015-06-02 KR KR1020167034301A patent/KR101937551B1/ko active IP Right Grant
- 2015-06-02 WO PCT/JP2015/065917 patent/WO2015194365A1/ja active Application Filing
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JPS58122343A (ja) * | 1982-01-13 | 1983-07-21 | Aisin Seiki Co Ltd | スタ−リング機関用ヒ−タ構造 |
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EP3159520B1 (en) | 2019-02-20 |
US10422300B2 (en) | 2019-09-24 |
CN106460724A (zh) | 2017-02-22 |
EP3159520A4 (en) | 2017-07-26 |
CN106460724B (zh) | 2018-06-29 |
KR20170002582A (ko) | 2017-01-06 |
KR101937551B1 (ko) | 2019-01-10 |
US20170138301A1 (en) | 2017-05-18 |
EP3159520A1 (en) | 2017-04-26 |
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