WO2012060377A1 - 燃焼加熱システム - Google Patents
燃焼加熱システム Download PDFInfo
- Publication number
- WO2012060377A1 WO2012060377A1 PCT/JP2011/075184 JP2011075184W WO2012060377A1 WO 2012060377 A1 WO2012060377 A1 WO 2012060377A1 JP 2011075184 W JP2011075184 W JP 2011075184W WO 2012060377 A1 WO2012060377 A1 WO 2012060377A1
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- WIPO (PCT)
- Prior art keywords
- combustion
- plate
- outer peripheral
- path
- flame
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/125—Radiant burners heating a wall surface to incandescence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/126—Radiant burners cooperating with refractory wall surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/03001—Miniaturized combustion devices using fluid fuels
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the fuel gas is burned at the fuel gas discharge port provided on the surface of the radiation surface, and the exhaust gas is exhausted to the surrounding environment without being collected. Therefore, it is difficult to improve the radiation intensity because the exhaust heat cannot be recovered, the thermal efficiency is lowered, and the area of the radiation surface is reduced by the formation of the fuel gas discharge port. Furthermore, there is a possibility that the surrounding environment cannot be improved due to the temperature around the device being increased by the heat of the exhaust gas or the exhaust gas being filled.
- combustion heater called a micro combustor with improved thermal efficiency.
- This combustion heater has a sealed structure in the range extending from the fuel gas introduction path, the combustion chamber, and the exhaust gas exhaust path after combustion, and the introduction path and the exhaust path are adjacent to each other, and the heat of the exhaust gas is used before the combustion.
- the fuel gas is preheated to increase thermal efficiency (see, for example, Patent Document 2).
- the combustion heater as in Patent Document 2 described above has a sealed structure for efficiently using the heat of the exhaust gas and collecting the exhaust gas.
- the thermal deformation of the partition plate that separates the introduction path and the outlet path in the combustion heater increases, resulting in uneven temperature distribution and increased CO (carbon monoxide) emission concentration due to incomplete combustion.
- CO carbon monoxide
- an object of the present invention is to provide a combustion heating system capable of achieving both fire transfer properties and flame holding properties even when a plurality of combustion heaters are connected. .
- the combustion heating system of the present invention includes a heating plate, an arrangement plate disposed opposite to the heating plate, an annular outer peripheral wall arranged between the heating plate and the arrangement plate, and between the heating plate and the arrangement plate.
- a partition plate disposed along the outer peripheral wall, a combustion chamber that holds the flame by causing fuel gas to collide with a flame holding portion that is a part of the outer peripheral wall, and the placement plate and the partition plate serve as side walls.
- a plurality of combustion heaters connected to each other.
- the combustion heating system of the present invention includes a communication passage that is disposed at a connecting portion of the plurality of combustion heaters and that allows the respective combustion chambers to communicate with each other.
- the flame-holding portion and the communication path are arranged in parallel in the opposing direction of the heating plate and the arrangement plate.
- the communication path may be disposed at a position where the distance between the combustion chambers of the plurality of connected combustion heaters is the shortest.
- the combustion heating system of the present invention is connected to the introduction path to flow the fuel gas into the combustion heater, and connected to the outlet path to direct the exhaust gas to the outside of the combustion heater.
- a communication pipe that communicates each of the second pipe parts of the plurality of combustion heaters with each other. Further, the communication pipe may have an enlarged portion having a larger flow area than the second piping portion.
- first piping part and the second piping part may be arranged inside the other to form a double pipe.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. It is the enlarged view in the area
- 3B is a perspective sectional view taken along line BB in FIG. 3A.
- FIG. It is a perspective view which shows the external appearance example of a combustion heating system. It is a top view for demonstrating the structure of a combustion heating system.
- FIG. 5B is a cross-sectional view taken along the line CC of FIG. 5A.
- FIG. 5B is an enlarged view of a region X2 in FIG. 5B. It is a perspective view for demonstrating a fire transfer part.
- the combustion heater is formed with a combustion chamber, a fuel gas (unburned gas: gas before combustion) introduction path, and an exhaust gas (combustion gas: gas after combustion) outlet path sealed.
- a main body container is provided. Further, the combustion heater realizes excess enthalpy combustion in the combustion chamber by preheating the fuel gas flowing through the introduction path with the heat of the exhaust gas flowing through the outlet path. Since such a combustion heater recovers the heat of the exhaust gas, the thermal efficiency is high and the exhaust gas is also recovered, so that the surrounding environment is not impaired. Further, since it is not necessary to form the fuel gas discharge port on the radiation surface, the area of the radiation surface is not reduced and the radiation intensity is high.
- FIG. 1 is an assembly diagram for explaining the structure of the combustion heater 110.
- 2A is a cross-sectional view taken along line AA in FIG.
- FIG. 2B is an enlarged view of region X1 in FIG. 2A.
- 2A is the vertical direction of the combustion heater 110.
- the combustion heater 110 includes a heating plate 118, an arrangement plate 120, an outer peripheral wall 122, a partition plate 124, a combustion chamber 126, an introduction passage 128, a lead-out passage 130, a first passage,
- the piping part 132 and the 2nd piping part 134 are included.
- the combustion heater 110 will be described with an example in which the outer dimension in the two-dimensional direction is about 220 mm ⁇ 140 mm (440 mm ⁇ 140 mm when two are connected in the longitudinal direction as will be described later).
- the external shape of the combustion heater 110 is not limited to this size, and can be set to an arbitrary size.
- the heating plate 118 and the arrangement plate 120 are formed of a material having high heat resistance and oxidation resistance, for example, stainless steel (SUS: Stainless Steel Used), or a material having high thermal conductivity, for example, brass (brass). Yes.
- the heating plate 118 and the arrangement plate 120 are arranged opposite to each other and are arranged substantially parallel to each other (substantially parallel for causing excess enthalpy combustion in the present embodiment).
- the heating plate 118 and the arrangement plate 120 also function as a radiator that is heated by the combustion heat generated in the combustion chamber 126.
- positioning board 120 is not restricted to the structure which functions as a radiator, For example, it is good also as a heat insulation structure.
- the outer peripheral wall 122 has an inner periphery formed in a track shape (a shape composed of two substantially parallel line segments and two arcs (semicircles) connecting the two line segments) in a plan view, and an outer periphery formed in a rectangular shape. ing.
- the outer peripheral wall 122 is disposed between the heating plate 118 and the arrangement plate 120. Moreover, the outer peripheral surface of the outer peripheral wall 122 can also be used as a radiation surface.
- the outer peripheral wall 122 is arrange
- the main body container of the combustion heater 110 includes an outer peripheral wall 122, a heating plate 118 that closes the outer peripheral wall 122 from above and below, and an arrangement plate 120.
- the area of the upper and lower wall surfaces (the plate surface of the heating plate 118 and the arrangement plate 120) is larger than the area of the outer peripheral surface (the outer peripheral surface of the outer peripheral wall 122). That is, the upper and lower wall surfaces occupy most of the outer surface of the main body container.
- the partition plate 124 has a smaller outer shape than the heating plate 118 and the arrangement plate 120 and is formed in a shape along the inner peripheral surface of the outer peripheral wall 122.
- the partition plate 124 is disposed between the heating plate 118 and the arrangement plate 120 substantially in parallel with the heating plate 118 and the arrangement plate 120. Gaps are formed between the partition plate 124 and the heating plate 118 and between the partition plate 124 and the arrangement plate 120, respectively.
- the partition plate 124 is formed of a material having high heat resistance and oxidation resistance, such as stainless steel, or a material having high thermal conductivity, such as brass.
- the partition plates 124 may be disposed to face each other as long as a gap is formed between the heating plate 118 and the arrangement plate 120.
- positioning board 120 do not have a restriction
- the positional relationship among the heating plate 118, the arrangement plate 120, the outer peripheral wall 122, and the partition plate 124 will be described with reference to the assembly diagram of FIG. A partition plate 124 and an outer peripheral wall 122 are superimposed on the arrangement plate 120 from above.
- the arrangement plate 120 is fixed to the end of the first piping portion 132, while the partition plate 124 protrudes upward from the first piping portion 132. It is fixed to the end of 134. Therefore, the arrangement plate 120 and the partition plate 124 are separated by a distance between the end portion of the first piping portion 132 and the end portion of the second piping portion 134.
- the partition plate 124 is disposed inside the outer peripheral wall 122. At this time, a gap as a combustion chamber 126 is formed between the outer peripheral end of the partition plate 124 and the cylindrical inner peripheral surface of the outer peripheral wall 122.
- the heating plate 118 is overlaid on the outer peripheral wall 122 from above.
- the lead-out path 130 is a space sandwiched between the heating plate 118 and the partition plate 124 with the heating plate 118 and the partition plate 124 as side walls.
- the lead-out path 130 collects the exhaust gas from the combustion chamber 126 at the center of the main body container and flows it toward the outside of the combustion heater 110.
- the introduction path 128 and the lead-out path 130 overlap each other in the thickness direction in the main body container, the heat of the exhaust gas is transmitted through the partition plate 124, and the fuel Gas can be preheated.
- the light gray arrow indicates the fuel gas flow
- the dark gray arrow indicates the exhaust gas flow
- the black arrow indicates heat transfer.
- the partition plate 124 is formed of a material that is relatively easy to conduct heat, and the heat of the exhaust gas that passes through the lead-out path 130 is transferred to the fuel gas that passes through the introduction path 128 via the partition plate 124 (heat transfer). .
- the exhaust gas flowing through the outlet passage 130 and the fuel gas flowing through the inlet passage 128 are opposed to each other (counter flow) with the partition plate 124 interposed therebetween, so the fuel gas is efficiently used by the heat of the exhaust gas. Therefore, it is possible to preheat and to obtain high thermal efficiency.
- excess enthalpy combustion in which fuel gas is preheated in this way, combustion of the fuel gas can be stabilized, and the concentration of CO generated by incomplete combustion can be suppressed to an extremely low concentration.
- a representative of the cross-sectional shape perpendicular to the flow of the fuel gas (hereinafter referred to as the flow channel cross-sectional shape) at the connection portion of the introduction passage 128 with the combustion chamber 126.
- the dimension is preferably set to be equal to or less than the extinguishing distance in consideration of the extinguishing distance (including the extinguishing equivalent diameter) to the extent that the entrance of the flame to the introducing path 128 can be prevented (the combustion reaction is not propagated in the introducing path 128).
- the representative dimension is a dimension determined by the cross-sectional shape of the flow channel immediately before the fuel gas flows into the combustion chamber 126.
- the representative dimension indicates a diameter of a circular cross section
- the representative dimension indicates a hydraulic equivalent diameter of the cross section.
- the hydraulic equivalent diameter is obtained by 4 ⁇ channel cross-sectional area / wetting edge length.
- the wetting edge length indicates the length of the wall (arrangement plate 120, partition plate 124) portion in contact with the fuel gas in the cross section of the flow path.
- the arrangement plate 120 is provided on the lower surface of the partition plate 124 near the combustion chamber 126 (on the arrangement plate 120 side). A plurality of protrusions 152 that are in contact with each other are arranged with a predetermined interval L (see FIG. 3B).
- FIG. 3A is a perspective view for explaining a plurality of protrusions 152.
- FIG. 3A is a perspective view of the combustion heater 110.
- FIG. 3B is a perspective cross-sectional view of the cross section taken along line BB of FIG. 3A viewed from the direction of the arrow.
- a portion of the protrusion 152 that is hidden by the partition plate 124 is indicated by a broken line.
- An arrow 154 indicates the direction of fuel gas flow.
- the introduction channel 128 is narrowed in cross section by a plurality of protrusions 152 provided on the partition plate 124. As shown in FIGS.
- the extinguishing distance d of the fuel gas is represented by the size of the diameter of the tube wall model, and is obtained from the equation (1).
- d 2 ⁇ ⁇ Nu1 / 2 / Cp ⁇ ⁇ u ⁇ Su (1)
- ⁇ is the thermal conductivity
- Nu is the Nusselt number
- Cp is the constant pressure specific heat
- ⁇ u is the density of the fuel gas
- Su is the combustion rate.
- FIG. 4 is a perspective view showing an example of the appearance of the combustion heating system 100.
- FIG. 5A is a plan view for explaining the structure of the combustion heating system 100.
- FIG. 5B is a cross-sectional view taken along the line CC of FIG. 5A.
- FIG. 5C is an enlarged view of region X2 in FIG. 5B.
- FIG. 6 is a perspective view for explaining the fire transfer section 170.
- a portion extending to the near side in the drawing of the combustion heating system 100 is omitted, and detailed description regarding a cross section of the omitted portion is omitted.
- the combustion heating system 100 has a structure in which a plurality of combustion heaters 110 are connected to each other, burns supplied fuel gas, heats each combustion heater 110, and exhausts it. Collect gas.
- a plurality of combustion heaters 110 having a relatively small amount of heat and a heating area are combined. Since a relatively small combustion heater 110 can be used, individual thermal deformation at the time of combustion can be suppressed as compared with a case where the combustion heater 110 alone is designed to be large. Further, even if the combustion heaters 110 are further connected in response to a request for increasing the amount of heat and the heating area, the individual combustion capacity is not affected by the increase in the number of connections of the combustion heaters 110. Therefore, the stability and durability can be maintained. In the present embodiment, for convenience of explanation, the case where only two combustion heaters 110 are connected is described, but the combustion heater 110 may be arbitrarily connected in the longitudinal direction and the short direction of the combustion heater 110.
- the combustion heating system 100 having various aspect ratios can be configured.
- the cross-sectional shape of the communication path 174 is designed so that the flame passes through the communication path 174 (so that the combustion reaction propagates between the plurality of combustion heaters 110 connected).
- the representative dimension of the communication path 174 is set to be larger than the flame extinguishing distance d in the above-described formula (1). For example, if the flame extinguishing distance d is 3 mm and the cross-sectional shape of the communication path 174 is a rectangle with a height of 3 mm and a width of 10 mm, the representative dimension is 4.6 mm and the flame can be sufficiently propagated. It becomes possible. Therefore, as shown in FIG.
- the height h 1 of the outer peripheral wall 122 of the combustion heater 110 constituting the combustion heating system 100 is equal to the height h 2 of the flame holding portion 172 required for flame holding. This is the sum of the height h 3 of the communication path 174 determined based on the extinction distance d of the path 174.
- the communication path 174 is formed at a position where the distance between the combustion chambers 126 of the plurality of connected combustion heaters 110 is the shortest.
- the communication passage 174 is formed at a connection portion of a plurality of combustion heaters 110 to be connected, and approximately in the center in the short direction of the combustion heating system 100.
- a plurality of communication paths 174 are positioned on a straight line connecting the centers of the track-shaped arcs. The distance between the combustion chambers 126 is the shortest.
- the flame extinguishing distance d of the communication path 174 can be shortened by shortening the distance between the plurality of combustion chambers 126. Therefore, even when the representative dimension of the communication path 174 is set small, it is possible to reliably propagate the flame and improve the ignition reliability.
- the position of the communication path 174 is not limited to the position where the distance between the plurality of combustion chambers 126 is the shortest, and can be arbitrarily set within a range in which a fire transfer is possible. By installing such a communication path 174, stable fire transfer was confirmed under the operating conditions of the combustion heating system 100.
- FIG. 7 is a plan view for explaining the propagation of the flame.
- the ignition device 176 ignites the nearby combustion chamber 126
- flames are sequentially propagated in the combustion chamber 126 along the inner peripheral surface of the outer peripheral wall 122 as indicated by arrows in FIG. 7.
- the pressure generated in the combustion chamber 126 when the fuel gas is ignited generates a pressure wave in the direction toward the other connected combustion heater 110 (right direction in FIG. 7), and the propagation speed of the flame is generated by the pressure wave. Becomes higher.
- such pressure waves are concentrated by the inner peripheral surface of the outer peripheral wall 122 having a semicircular shape in plan view, and further accelerated and flow into the communication path 174, the flame is connected to other combustion heating connected Is easily propagated to the vessel 110.
- the flame-holding portion 172 and the communication path 174 are arranged side by side in the vertical direction, it is possible to achieve both fire transfer properties and flame-holding properties at the time of ignition.
- all the combustion heaters 110 can be ignited with only one ignition, thereby reducing costs and improving workability.
- at the time of steady combustion in each combustion heater 110 constituting the combustion heating system 100, it is possible to maintain high thermal efficiency and improve the surrounding environment as described above.
- piping connected to the main body container of the combustion heater 110 in which the ignition device 176 is arranged is referred to as the first piping portion 132a and the second piping among the first piping portion 132 and the second piping portion 134. It is assumed that part 134a. Further, the pipes connected to the main body container of the combustion heater 110 on the side where the fire is transferred through the communication path 174 are referred to as a first pipe part 132b and a second pipe part 134b.
- the combustion heating system 100 includes a communication pipe 180 that allows the second piping parts 134 a and 134 b of the plurality of combustion heaters 110 to communicate with each other.
- the communication pipe 180 has an enlarged portion 182 having a larger flow path area than the second pipe portions 134a and 134b.
- This flow path area is a cross-sectional area of the flow path in a direction orthogonal to the flow direction of the exhaust gas.
- the whole flow path of the communication pipe 180 is formed wider than the flow path of 2nd piping part 134a, 134b. That is, the enlarged portion 182 is formed over the entire communication pipe 180.
- the flow passage area of a part of the communication pipe 180 may be larger than the flow passage area of the second piping parts 134 a and 134 b, and the enlarged part 182 may be provided only in a part of the communication pipe 180.
- FIG. 9A and 9B are vertical sectional views for explaining the propagation of the pressure wave.
- FIG. 9A shows the configuration of this embodiment
- FIG. 9B shows the configuration of a comparative example.
- a plurality of elliptical arcs 184 are shown closer to each other as the pressure wave becomes stronger.
- the flow passage area of the communication pipe 10 is equal to the flow passage areas of the second piping portions 134a and 134b.
- the generated pressure wave hardly weakens in the communication pipe 10 and flows in the direction in which it flows backward through the second piping part 134b of the combustion heater 110 on the fire transfer side (the direction opposite to the flow direction of the exhaust gas). Propagate.
- the cross-sectional area of the flow path of the enlarged portion 182 is large, the volume of the medium (gas such as exhaust gas and air in the communication pipe 180) through which the pressure wave propagates is large. Therefore, the energy of the pressure wave is easily weakened by propagating through the communication pipe 180 as compared with the comparative example of FIG. 9B.
- the pressure wave propagates from the pipe having a large channel area toward the pipe having a small channel area, so that the pressure wave is further difficult to propagate.
- the combustion heating system 100 suppresses the influence of the propagation of the pressure wave through the second piping parts 134a and 134b, and the fire transfer to the other combustion heater 110 to be connected by the flame propagating through the communication path 174. Can be further improved.
- the inner peripheral surface of the outer peripheral wall 122 is formed in a track shape in plan view, but may be any shape as long as it is annular.
- the inner peripheral surface of the outer peripheral wall 122 may be formed in an annular shape or a rectangular shape in plan view.
- the present invention can be used in a combustion heating system in which a plurality of combustion heaters that combust fuel and heat an object to be heated are connected to each other.
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Abstract
Description
本願は、2010年11月4日に日本に出願された特願2010-247371号に基づき優先権を主張し、その内容をここに援用する。
図1は、燃焼加熱器110の構造を説明するための組立図である。図2Aは、図1のA-A線での断面図である。図2Bは、図2Aの領域X1での拡大図である。なお、図2Aの紙面上下方向は、燃焼加熱器110の鉛直方向である。図2Aに示すように、燃焼加熱器110は、加熱板118と、配置板120と、外周壁122と、仕切板124と、燃焼室126と、導入路128と、導出路130と、第1配管部132と、第2配管部134とを含む。なお、本実施形態では、燃焼加熱器110は、2次元方向での外形が220mm×140mm(後述するように長手方向に2つ連結すると440mm×140mm)程度のものを例に挙げて説明する。ただし、燃焼加熱器110の外形は、かかる大きさに限定されず、任意の大きさに設定することができる。
d=2λ・Nu1/2/Cp・ρu・Su …式(1)
式(1)において、λは熱伝導率、Nuはヌセルト数、Cpは定圧比熱、ρuは燃料ガスの密度、Suは燃焼速度である。
続いて、このような燃焼加熱器110を、要求される熱量や加熱面積に応じた数だけ複数連結して構成される、燃焼加熱システム100を説明する。
図4は、燃焼加熱システム100の外観例を示す斜視図である。図5Aは、燃焼加熱システム100の構造を説明するための平面図である。図5Bは、図5AのC-C線での断面図である。図5Cは、図5Bの領域X2での拡大図である。図6は、火移り部170を説明するための斜視図である。ただし、図6では、説明の便宜上、燃焼加熱システム100の図中手前側に延長されている部位を省略し、また、省略した部分の断面に関する詳細な記載を省いている。
図4に示すように、燃焼加熱システム100は、複数の燃焼加熱器110を互いに連結した構造を有し、供給される燃料ガスを燃焼させて、それぞれの燃焼加熱器110を加熱し、その排気ガスを回収する。
本実施形態では、説明の便宜のため、燃焼加熱器110を2つのみ連結する場合を挙げているが、燃焼加熱器110の長手方向および短手方向に任意に燃焼加熱器110を連結することができ、様々な縦横比の燃焼加熱システム100を構成することができる。
本実施形態では、図6に示すように、外周壁122の高さ方向すべてに渡って連通路174を形成せず、保炎に必要とされる高さの保炎部位172として、外周壁122の一部を残している。そのため、導入路128を流れてきた燃料ガスは、図5Bの領域X2を拡大した図5Cに示すように、燃焼室126において保炎部位172に衝突し燃焼する。保炎部位172は、燃焼室126において保炎性を確保するのに十分な高さを有しているので、連通路174が形成されていない燃焼室126と同様の燃焼が可能であり、COを排出することなく熱効率の維持を図ることが可能となる。なお、燃焼室126は、外周壁122の配置板120側の内周面に燃料ガスを衝突させて、その流動を滞らせることにより保炎する。すなわち、燃焼室126は、外周壁122の一部である保炎部位172に燃料ガスを衝突させて保炎する。
図5Cに示すように、連通路174は、保炎部位172の上方に、連結された複数の燃焼加熱器110の燃焼室126を互いに連通する貫通孔として形成される。かかる構成により、点火によって一方の燃焼加熱器110で生じた火炎が連通路174を通って他方にも伝播し、連結されたすべての燃焼加熱器110を短時間で点火することが可能となる。本実施形態では、連通路174を保炎部位172の上方に形成する例を挙げたが、保炎部位172として保炎性を確保できれば、保炎部位172の下方に形成することもできる。また、本実施形態では、連通路174の断面形状を矩形に形成する例を挙げているが、かかる場合に限られず、円形や多角形等様々な形状を用いることができる。
110 …燃焼加熱器
118 …加熱板
120 …配置板
122 …外周壁
124 …仕切板
126 …燃焼室
128 …導入路
130 …導出路
132、132a、132b …第1配管部
134、134a、134b …第2配管部
170 …火移り部
172 …保炎部位
174 …連通路
176 …点火装置
180 …連通管
182 …拡大部
Claims (5)
- 加熱板と、前記加熱板に対向配置された配置板と、前記加熱板と前記配置板との間に配置された環状の外周壁と、前記加熱板と前記配置板との間に配置された仕切板と、前記外周壁に沿って位置し前記外周壁の一部である保炎部位に燃料ガスを衝突させて保炎する燃焼室と、前記配置板と前記仕切板とを側壁とし前記燃焼室に向けて燃料ガスを流動させる導入路と、前記加熱板と前記仕切板とを側壁とし前記燃焼室から排気ガスを外部に向けて流動させると共に前記仕切板を介して排気ガスの熱で燃料ガスを予熱する導出路と、を備える燃焼加熱器を複数連結した燃焼加熱システムであって、
複数の前記燃焼加熱器の連結部に配置されると共にそれぞれの前記燃焼室を互いに連通させる連通路を備え、
前記保炎部位と前記連通路とが、前記加熱板と前記配置板との対向方向に並設されている燃焼加熱システム。 - 前記外周壁の高さは、保炎に必要とされる前記保炎部位の高さと、前記連通路の消炎距離に基づいて決定される前記連通路の高さの和である請求項1に記載の燃焼加熱システム。
- 前記連通路は、連結された複数の前記燃焼加熱器のそれぞれの前記燃焼室間の距離が最短となる位置に配置されている請求項1に記載の燃焼加熱システム。
- 前記導入路に接続されて燃料ガスを前記燃焼加熱器に向けて流動させる第1配管部と、
前記導出路に接続されて排気ガスを前記燃焼加熱器の外部に向けて流動させる第2配管部と、
複数の前記燃焼加熱器のそれぞれの前記第2配管部を互いに連通させる連通管と、をさらに備え、
前記連通管は、前記第2配管部よりも流路面積が大きな拡大部を有する請求項1に記載の燃焼加熱システム。 - 前記第1配管部および前記第2配管部の一方が、他方の内部に配されて二重管を形成している請求項4に記載の燃焼加熱システム。
Priority Applications (6)
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EP11838027.8A EP2636950B1 (en) | 2010-11-04 | 2011-11-01 | Combustion heating system |
US13/882,252 US9447968B2 (en) | 2010-11-04 | 2011-11-01 | Combustion-heating system |
KR1020137007877A KR101405277B1 (ko) | 2010-11-04 | 2011-11-01 | 연소 가열 시스템 |
BR112013010561A BR112013010561A2 (pt) | 2010-11-04 | 2011-11-01 | sistema de aquecimento por combustão |
CN201180051914.5A CN103180667B (zh) | 2010-11-04 | 2011-11-01 | 燃烧加热系统 |
JP2012541876A JP5445691B2 (ja) | 2010-11-04 | 2011-11-01 | 燃焼加熱システム |
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JP2017058124A (ja) * | 2016-10-31 | 2017-03-23 | 株式会社Ihi | 加熱炉および連続加熱炉 |
US10502487B2 (en) | 2011-09-05 | 2019-12-10 | Ihi Corporation | Heating furnace and continuous heating furnace |
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JP5961941B2 (ja) * | 2011-07-27 | 2016-08-03 | 株式会社Ihi | 密閉式ガスヒータおよび密閉式ガスヒータを用いた連続加熱炉 |
JP5849542B2 (ja) * | 2011-09-05 | 2016-01-27 | 株式会社Ihi | 連続加熱炉 |
US20140260313A1 (en) * | 2013-03-12 | 2014-09-18 | The University Of Sydney | Micro-mixer/combustor |
CN106537036A (zh) * | 2014-03-18 | 2017-03-22 | 詹政通 | 红外线瓦斯炉具的炉心结构 |
WO2018095988A1 (de) * | 2016-11-25 | 2018-05-31 | Frima International Ag | Brennersystem für ein gargerät sowie verfahren zum betreiben eines brennersystems für ein gargerät |
USD926520S1 (en) | 2019-01-09 | 2021-08-03 | Whirlpool Corporation | Cooking burner |
CN111765457B (zh) * | 2020-06-28 | 2023-04-18 | 江苏科技大学 | 一种利用余热的组合式微型燃烧器 |
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EP2636950B1 (en) | 2017-07-19 |
BR112013010561A2 (pt) | 2016-08-02 |
TWI435035B (zh) | 2014-04-21 |
US9447968B2 (en) | 2016-09-20 |
EP2636950A4 (en) | 2016-04-20 |
EP2636950A1 (en) | 2013-09-11 |
JP5445691B2 (ja) | 2014-03-19 |
CN103180667B (zh) | 2015-07-08 |
CN103180667A (zh) | 2013-06-26 |
KR101405277B1 (ko) | 2014-06-10 |
JPWO2012060377A1 (ja) | 2014-05-12 |
KR20130065699A (ko) | 2013-06-19 |
US20130216965A1 (en) | 2013-08-22 |
TW201233952A (en) | 2012-08-16 |
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