WO2018181325A1 - Préchauffeur d'air - Google Patents

Préchauffeur d'air Download PDF

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Publication number
WO2018181325A1
WO2018181325A1 PCT/JP2018/012452 JP2018012452W WO2018181325A1 WO 2018181325 A1 WO2018181325 A1 WO 2018181325A1 JP 2018012452 W JP2018012452 W JP 2018012452W WO 2018181325 A1 WO2018181325 A1 WO 2018181325A1
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WO
WIPO (PCT)
Prior art keywords
tube
air
exhaust gas
temperature
air preheater
Prior art date
Application number
PCT/JP2018/012452
Other languages
English (en)
Japanese (ja)
Inventor
建聖 渡邊
Original Assignee
住友重機械工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友重機械工業株式会社 filed Critical 住友重機械工業株式会社
Priority to JP2019509892A priority Critical patent/JP6952108B2/ja
Priority to MYPI2019005329A priority patent/MY195370A/en
Publication of WO2018181325A1 publication Critical patent/WO2018181325A1/fr
Priority to PH12019502107A priority patent/PH12019502107A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • 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 present invention relates to an air preheater.
  • Patent Document 1 As a conventional boiler system, one that heats a heat transfer medium by burning fuel is known (see, for example, Patent Document 1).
  • the heated heat transfer medium circulates in a circulation system in the system. Further, the combustion gas generated by the combustion of the fuel is subjected to a heat exchange process or the like, and then discharged to the outside as an exhaust gas.
  • an object of the present invention is to provide an air preheater that can suppress the corrosion of the tube while suppressing a decrease in boiler efficiency.
  • An air preheater is an air preheater that recovers heat of exhaust gas from a boiler and preheats air, and includes a first tube provided in an exhaust gas passage that allows exhaust gas to pass through, A second tube that surrounds the first tube from the outer peripheral side and extends along the first tube. Air flows through the first tube, and the first tube flows through the second tube. Air with a higher temperature than air flows.
  • An air preheater includes a first tube provided in an exhaust gas passage.
  • the first tube can recover the heat of the exhaust gas flowing through the exhaust gas flow path by the air flowing through the first tube.
  • the air preheater includes a second tube that surrounds the first tube from the outer peripheral side and extends along the first tube.
  • a double tube is comprised by the 1st tube and the 2nd tube.
  • air having a higher temperature than the air flowing through the first tube flows through the second tube, which is a tube outside the double tube.
  • the air after passing through the first tube at least once may flow through the second tube. Since the air that has passed through the first tube at least once has recovered the heat of the exhaust gas, the temperature is higher than the air that is passing through the first tube on the most downstream side. Therefore, by flowing the air through the second tube, a structure for securing high-temperature air for flowing from the place other than the air preheater to the second tube becomes unnecessary.
  • a plurality of first tubes may be provided in the exhaust gas flow path, and a second tube may be provided for a part of the plurality of first tubes.
  • the second tube is provided only for those having a low exhaust gas temperature passing through and having a high possibility of low temperature end corrosion, and the passing exhaust gas temperature is high and there is a possibility of low temperature end corrosion.
  • the second tube is not provided for low ones. Thereby, the manufacturing cost of an air preheater can be suppressed.
  • the air preheater which concerns on one form detects the temperature of the exhaust gas in the downstream from the area
  • An exhaust gas temperature detection unit that controls the flow rate of air that flows to the second tube based on detection results of the air temperature detection unit and the exhaust gas temperature detection unit. By performing such control, it is possible to flow air at an appropriate flow rate to the second tube.
  • FIG. 1 It is a schematic structure figure of a boiler system provided with an air preheater concerning an embodiment of the present invention. It is a figure which shows schematic structure of the air preheater shown in FIG. It is a figure which shows schematic structure of the corrosion suppression structure of the air preheater shown in FIG.
  • the boiler system 100 is an external circulation type (circulating fluidized bed type) circulating fluidized bed boiler.
  • the boiler system 100 includes a fluidized bed furnace 3 having a vertically long cylindrical shape.
  • a fuel supply port 3a for supplying fuel is provided in the middle part of the furnace 3, and a gas outlet 3b for discharging combustion gas is provided in the upper part.
  • the fuel supplied from the fuel supply device 5 to the furnace 3 is supplied into the furnace 3 through the fuel supply port 3a.
  • a cyclone 7 that functions as a solid-gas separator is connected to the gas outlet 3 b of the furnace 3.
  • the discharge port 7a of the cyclone 7 is connected to a downstream gas processing system via a gas line.
  • a return line 9 called a downcomer extends downward from the bottom outlet of the cyclone 7, and the lower end of the return line 9 is connected to the intermediate side surface of the furnace 3.
  • the solid material containing the fuel supplied from the fuel supply port 3a flows by the combustion / flowing air introduced from the lower air supply line 3c, and the fuel flows while the fuel flows, for example, about 800 to 900.
  • Burn at °C. A combustion gas generated in the furnace 3 is introduced into the cyclone 7 with accompanying solid particles.
  • the cyclone 7 separates solid particles and gas by a centrifugal separation action, returns the solid particles separated via the return line 9 to the furnace 3, and removes the combustion gas from which the solid particles have been removed from the discharge port 7 a to the gas line. To the subsequent gas processing system.
  • in-furnace bed material a solid material called “in-furnace bed material” is generated and collected at the bottom, and the bed material is sintered and melted and solidified by the concentration of impurities (low melting point materials, etc.) in the in-furnace bed material, or It is necessary to suppress malfunctions caused by incombustible impurities. For this reason, in the furnace 3, the in-furnace bed material is discharged
  • the gas treatment system includes a gas heat exchange device 13 connected to the discharge port 7a of the cyclone 7 via a gas line, and a dust collector 15 connected to the discharge port 13a of the gas heat exchange device 13 via a gas line. And.
  • the gas heat exchanger 13 is provided with a boiler tube 13b that superheats steam so as to cross the exhaust gas flow path.
  • An air preheater 50 that recovers the heat of the exhaust gas and preheats the air is provided at the discharge port 13a in the gas heat exchanger 13.
  • the configuration of the air preheater 50 will be described later.
  • the dust collector 15 removes fine particles such as fly ash that are still accompanying the combustible gas.
  • a bag filter or an electric dust collector is adopted as the dust collector 15.
  • the clean gas discharged from the discharge port 15 a of the dust collector 15 is discharged to the outside through the gas line and the pump 17 from the chimney 19.
  • Solid particles generated in the furnace 3 circulate in the circulation system 21 including the furnace 3, the cyclone 7, and the return line 9.
  • the fluid of solid particles is referred to as a heat transfer medium.
  • a heat exchange chamber 20 is formed between the return line 9 and the bottom of the furnace 3.
  • a heat transfer medium is stored in the heat exchange chamber 20.
  • a heat exchanger 22 is provided in the heat exchange chamber 20.
  • the gas heat exchange device 13 includes an exhaust gas passage 101 through which the exhaust gas EG passes.
  • the exhaust gas flow channel 101 includes side wall portions 101a and 101b that face each other and side wall portions (not shown) that face each other in the front-rear direction of the paper surface.
  • the direction in which the exhaust gas EG flows in the exhaust gas channel 101 is referred to as the Z-axis direction.
  • the upstream side with respect to the flow of the exhaust gas EG is the negative side in the Z-axis direction, and the downstream side is the positive side in the Z-axis direction.
  • the direction in which the side wall portions 101a and 101b face each other is the X-axis direction.
  • the direction in which the side wall 101a is arranged is the negative side in the X-axis direction, and the side in which the side wall 101b is arranged (the right side in the drawing) is the positive side in the X-axis direction.
  • the front-rear direction on the paper is the Y-axis direction.
  • the back side of the paper is the negative side in the Y-axis direction, and the front side of the paper is the positive side in the Y-axis direction.
  • the air preheater 50 recovers heat from the exhaust gas EG in the exhaust gas channel 101 and preheats the air.
  • the air preheater 50 includes a plurality (three in this case) of heat exchange units 51A, 51B, and 51C provided in the exhaust gas passage 101.
  • the heat exchange units 51A, 51B, and 51C are provided in this order from the upstream side to the downstream side with respect to the flow of the exhaust gas EG, that is, from the negative side to the positive side in the Z-axis direction.
  • the heat exchange units 51 ⁇ / b> A, 51 ⁇ / b> B, 51 ⁇ / b> C include a plurality of first tubes 52 provided in the exhaust gas passage 101, an inlet portion 53 communicating with each inlet of the plurality of first tubes 52, and a plurality of first tubes. And an outlet 54 that communicates with each outlet of the tube 52.
  • the first tube 52 extends in the X-axis direction between the side wall 101a and the side wall 101b. In the first tube 52, air that exchanges heat with the exhaust gas EG flowing through the exhaust gas passage 101 flows.
  • the first tube 52 extends at least over the entire length between the side wall 101a and the side wall 101b.
  • the first tube 52 passes through the side wall 101a and opens outside the exhaust gas passage 101, and passes through the side wall 101b and opens outside the exhaust gas passage 101 (see, for example, FIG. 3).
  • the plurality of first tubes 52 are arranged so as to be parallel to each other so as to be arranged in the Z-axis direction and the Y-axis direction.
  • a gap is provided between the first tubes 52 adjacent to each other so that the exhaust gas EG can pass therethrough.
  • the inlet portion 53 is a box-shaped member having an internal space, is provided outside the exhaust gas flow channel 101, and is provided so that the inflow ports of the plurality of first tubes 52 communicate with the internal space.
  • the inlet portion 53 expands the flow of air in the internal space so as to distribute the supplied air to each of the plurality of first tubes 52.
  • the outlet portion 54 is a box-shaped member having an internal space, is provided outside the exhaust gas flow channel 101, and is provided so that the outlets of the plurality of first tubes 52 and the internal space communicate with each other.
  • the outlet 54 collects the air that has flowed out from the plurality of first tubes 52.
  • the inlet 53 of the heat exchange unit 51A is provided on the positive side wall 101b in the X-axis direction, and the outlet 54 is provided on the negative side wall 101a in the X-axis direction.
  • the inlet part 53 of the heat exchange unit 51B is provided on the negative side wall part 101a in the X-axis direction, and the outlet part 54 is provided on the positive side wall part 101b in the X-axis direction.
  • the inlet 53 of the heat exchange unit 51C is provided on the positive side wall 101b in the X axis direction, and the outlet 54 is provided on the negative side wall 101a in the X axis direction.
  • heat exchange air is supplied in the order of the heat exchange units 51C, 51B, and 51A.
  • a line L1 for supplying air from the outside of the air preheater 50 is connected to the inlet 53 of the heat exchange unit 51C.
  • the outlet part 54 of the heat exchange unit 51C and the inlet part 53 of the heat exchange unit 51B are connected via a line L2.
  • the outlet part 54 of the heat exchange unit 51B and the inlet part 53 of the heat exchange unit 51A are connected via a line L3.
  • a line L4 is connected to the outlet portion 54 of the heat exchange unit 51A to allow preheated air to flow out to the outside in the air preheater 50.
  • the air preheated by the air preheater 50 is supplied to various places where air is used in the boiler.
  • the air preheated by the air preheater 50 may be used as secondary combustion air for the furnace 3, or may be used as fluidizing air or combustion air at the bottom of the furnace 3.
  • the air preheater 50 configured as described above has a corrosion suppression structure 70 for suppressing low temperature end corrosion (acid dew point corrosion) of the first tube 52 at a position on the downstream end side in the flow of the exhaust gas EG.
  • a corrosion suppression structure 70 for suppressing low temperature end corrosion (acid dew point corrosion) of the first tube 52 at a position on the downstream end side in the flow of the exhaust gas EG.
  • Such corrosion at a low temperature is likely to occur when the moisture contained in the exhaust gas is large, when the sulfur content is high, or when the moisture and sulfur content is high.
  • fuels that easily generate exhaust gas include coal having a high sulfur content, petroleum coke, coal having a high moisture content, and woody fuel such as forest land residue.
  • the corrosion suppressing structure 70 is provided in the heat exchange unit 51C that is disposed on the most downstream side with respect to the flow of the exhaust gas EG.
  • the corrosion suppression structure 70 is provided with respect to the multiple 1st tube 52 arrange
  • the corrosion inhibiting structure 70 is not provided for the first tubes 52 of the upstream side of the first tubes 52 of the heat exchange units 51A and 51B and the heat exchange units 51C.
  • the corrosion suppression structure 70 includes a first tube 52, a second tube 71, an inlet portion 72 for the second tube 71, and an outlet portion 73 for the second tube 71.
  • the end portion 52a on the outflow side of the first tube 52 in the corrosion suppressing structure 70 extends so as to protrude to the negative side in the X-axis direction from the side wall portion 101a in order to provide the inlet portion 72.
  • the end portion 52b on the inflow side of the first tube 52 in the corrosion suppressing structure 70 extends so as to protrude to the positive side in the X-axis direction from the side wall portion 101b in order to provide the outlet portion 73.
  • the second tube 71 surrounds the first tube 52 from the outer peripheral side and extends along the first tube 52.
  • the central axis of the second tube 71 and the central axis of the first tube 52 may extend so as to coincide with each other. However, the central axis of the first tube 52 is deviated as long as the air flow is not affected. Also good.
  • the end portion 71a on the inflow side of the second tube 71 extends so as to protrude to the negative side in the X-axis direction from the side wall portion 101a. However, the end portion 71a has a smaller protruding amount than the end portion 52a of the first tube 52, and is disposed on the positive side in the X-axis direction with respect to the end portion 52a.
  • the end portion 71b on the outflow side of the second tube 71 extends from the side wall portion 101b so as to protrude to the positive side in the X-axis direction.
  • the end portion 71b has a smaller protruding amount than the end portion 52b of the first tube 52, and is disposed on the negative side in the X-axis direction than the end portion 52b.
  • the end portions 71a and 71b of the second tube 71 do not have to protrude from the side wall portions 101a and 101b, and need only extend at least over the entire length between the side wall portion 101a and the side wall portion 101b.
  • the 2nd tube 71 is provided with respect to all the 1st tubes 52 shown by FIG.
  • the 2nd tube 71 is with respect to a part of several 1st tube 52. It is provided. That is, the second tube 71 is not provided in the first tube 52 on the upstream side with respect to the flow of the exhaust gas EG, and is exposed to the exhaust gas EG.
  • the material of the first tube 52 and the second tube 71 is not particularly limited, but a general material such as carbon steel may be applied in order to reduce the material cost. That is, by adopting the corrosion inhibiting structure 70, it is not necessary to employ an expensive material resistant to corrosion as the tube material itself. However, the present invention does not exclude the use of these expensive materials as the material of the first tube 52 and the second tube 71.
  • the inlet portion 72 is a box-shaped member having an internal space, is provided outside the exhaust gas flow channel 101, and is provided so that the inflow ports of the plurality of second tubes 71 communicate with the internal space.
  • the inlet part 72 expands the flow of air in the internal space so as to distribute the supplied air to each of the plurality of second tubes 71.
  • the inlet portion 72 for the second tube 71 is provided inside the outlet portion 54 of the heat exchange unit 51C, and airtightness is ensured so as not to communicate with the internal space of the outlet portion 54.
  • the end portion 52 a of the first tube 52 extends so as to penetrate the inlet portion 72 and is disposed so as to open in the internal space of the outlet portion 54.
  • the outlet part 73 is a box-shaped member having an internal space, is provided outside the exhaust gas flow channel 101, and is provided so that each outlet of the plurality of second tubes 71 and the internal space communicate with each other.
  • the outlet portion 73 collects the air that has flowed out from the plurality of second tubes 71.
  • the outlet portion 73 for the second tube 71 is provided inside the inlet portion 53 of the heat exchange unit 51C, and airtightness is ensured so as not to communicate with the inner space of the inlet portion 53.
  • the end portion 52 b of the first tube 52 extends so as to penetrate the outlet portion 73 and is disposed so as to open in the internal space of the inlet portion 53.
  • air A2 having a higher temperature than the air A1 flowing through the first tube 52 flows.
  • air supplied from anywhere may be adopted as long as the temperature is higher than that of the air A1.
  • the temperature of the air A1 is not particularly limited, but may be about 30 to 90 ° C.
  • the air after passing through the first tube 52 flows through the second tube 71 at least once.
  • air discharged from the heat exchange unit 51A is employed as the air A2.
  • the temperature of such air A2 may be approximately 200 ° C. or higher.
  • the inlet 72 is connected to a line L6 branched from the line L4 extending from the outlet 54 of the heat exchange unit 51A (see also FIG. 2).
  • the air supplied from the line L ⁇ b> 6 flows to the second tube 71 through the inlet portion 72.
  • a line L7 is connected to the outlet portion 73.
  • the connection destination of the line L7 is not particularly limited, it may be connected to various places where air is used in the boiler, similarly to the line L4.
  • the air A2 passes through the second tube 71 outside the double pipe, the air pressure decreases. Therefore, the line L7 can reuse the recovered heat by supplying air to a position where high pressure is not required (for example, the upper part of the furnace or the seal air).
  • the flow rate of the air A2 with respect to the second tube 71 may be controlled according to the situation.
  • the corrosion suppression structure 70 may include an air temperature detection unit 81, an exhaust gas temperature detection unit 82, a flow rate adjustment unit 83, and a control unit 84.
  • the air temperature detector 81 detects the temperature of the air A ⁇ b> 2 flowing through the second tube 71.
  • the air temperature detection unit 81 may directly measure the air A2 in the second tube 71.
  • the air temperature detection unit 81 may be a position immediately before flowing into the second tube 71 (for example, the line L6 and the inlet 72) or immediately after flowing out. (For example, the line L7 and the outlet 73) may be measured.
  • the exhaust gas temperature detector 82 detects the temperature of the exhaust gas EG downstream of the region of the exhaust gas flow channel 101 where the first tube 52 is provided. That is, the exhaust gas temperature detection unit 82 detects the temperature of the exhaust gas EG in the region of the exhaust gas flow channel 101 on the downstream side of the heat exchange unit 51C of the air preheater 50.
  • the flow rate adjusting unit 83 adjusts the flow rate of the air A ⁇ b> 2 with respect to the second tube 71.
  • the flow rate adjusting unit 83 may be configured by, for example, a valve provided in the line L6.
  • the control unit 84 controls the flow rate of air that flows to the second tube 71 based on the detection results of the air temperature detection unit 81 and the exhaust gas temperature detection unit 82.
  • the control unit 84 adjusts the flow rate of the air A ⁇ b> 2 by sending a control signal corresponding to the flow rate to the flow rate adjustment unit 83.
  • the air preheater according to the comparative example is not provided with the corrosion suppressing structure 70 as in the present embodiment, and the second tube 71 is not provided in the first tube 52 on the most downstream side, and the exhaust gas EG is not provided. It is exposed to.
  • the exhaust gas EG generated by burning the fuel contains a large amount of moisture.
  • the acid dew point sulfuric acid dew point
  • the acid dew point increases (although it differs depending on the fuel used, it is generally 110 to 130 ° C).
  • the low temperature end corrosion (acid dew point corrosion) in which the first tube 52 disposed at the downstream end where the temperature of the exhaust gas EG becomes low is corroded. ) May occur.
  • the air preheater 50 includes a first tube 52 provided in the exhaust gas passage 101.
  • the first tube 52 can recover the heat of the exhaust gas EG flowing through the exhaust gas flow channel 101 by the air flowing through the first tube 52.
  • the air preheater 50 includes a second tube 71 that surrounds the first tube 52 from the outer peripheral side and extends along the first tube 52.
  • the first tube 52 and the second tube 71 constitute a double tube.
  • air having a higher temperature than the air flowing through the first tube 52 flows through the second tube 71 that is the outer tube of the double tube.
  • the first tube 52 is surrounded by the second tube 71 through which high-temperature air flows. Corrosion by low temperature exhaust gas EG can be suppressed. As mentioned above, corrosion of a tube can be suppressed, suppressing the fall of boiler efficiency.
  • the temperature of the tube wall of the second tube 71 is also maintained at a temperature at which low temperature end corrosion does not occur. it can. Therefore, it is not necessary to use a high-grade material that is resistant to corrosion as the material of the first tube 52 and the second tube 71, and thus the manufacturing cost can be suppressed.
  • the air after passing through the first tube 52 flows through the second tube 71 at least once. Since the air that has passed through the first tube 52 at least once has recovered the heat of the exhaust gas EG, it is more than the air A1 that is passing through the first tube 52 of the most downstream side corrosion suppression structure 70. The temperature is high. Therefore, by flowing the air through the second tube 71, a structure for securing high-temperature air for flowing into the second tube 71 from a place other than the air preheater 50 becomes unnecessary.
  • a plurality of first tubes 52 are provided in the exhaust gas flow path 101, and a second tube 71 is provided for a part of the plurality of first tubes 52.
  • the second tube 71 is provided only for those having a low exhaust gas temperature passing through and having a high possibility of low temperature end corrosion, and passing through the exhaust gas temperature is high, allowing low temperature end corrosion.
  • the second tube 71 is not provided for those having low properties. Thereby, the manufacturing cost of the air preheater 50 can be suppressed.
  • the air preheater 50 includes an air temperature detector 81 that detects the temperature of the air flowing through the second tube 71, and the temperature of the exhaust gas EG downstream of the region of the exhaust gas channel 101 where the first tube 52 is provided. And a control unit 84 that controls the flow rate of the air flowing to the second tube 71 based on the detection results of the air temperature detection unit 81 and the exhaust gas temperature detection unit 82. By performing such control, air having an appropriate flow rate can be flowed to the second tube 71.
  • the present invention is not limited to the embodiment described above.
  • the order of introduction of air into the heat exchange unit may be changed, and air may be simultaneously supplied in parallel to each of the heat exchange units 51A, 51B, 51C.
  • the air A2 is drawn from the line L4, but the drawing position of the air A2 is not particularly limited.
  • the air A2 may be drawn from the lines L2, L3, etc.
  • auxiliary heating may be performed when the temperature of the air drawn out from the lines L2 and L3 is not sufficient.
  • air A2 and air A1 flow so as to face each other, but they may flow in the same direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)
  • Chimneys And Flues (AREA)

Abstract

La présente invention concerne un préchauffeur d'air qui récupère de la chaleur depuis des gaz d'échappement de chaudière et préchauffe de l'air, ledit préchauffeur d'air étant équipé d'un premier tube disposé à l'intérieur d'un passage de flux de gaz d'échappement à travers lequel passent les gaz d'échappement, et d'un second tube entourant le premier tube depuis le côté circonférentiel externe de celui-ci et s'étendant le long du premier tube. De l'air s'écoule dans le premier tube, et de l'air à une température plus élevée que l'air s'écoulant dans le premier tube s'écoule dans le second tube.
PCT/JP2018/012452 2017-03-28 2018-03-27 Préchauffeur d'air WO2018181325A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2019509892A JP6952108B2 (ja) 2017-03-28 2018-03-27 空気予熱器
MYPI2019005329A MY195370A (en) 2017-03-28 2018-03-27 Air preheater
PH12019502107A PH12019502107A1 (en) 2017-03-28 2019-09-13 Air preheater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017062888 2017-03-28
JP2017-062888 2017-03-28

Publications (1)

Publication Number Publication Date
WO2018181325A1 true WO2018181325A1 (fr) 2018-10-04

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PCT/JP2018/012452 WO2018181325A1 (fr) 2017-03-28 2018-03-27 Préchauffeur d'air

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JP (1) JP6952108B2 (fr)
MY (1) MY195370A (fr)
PH (1) PH12019502107A1 (fr)
WO (1) WO2018181325A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259385A (ja) * 1987-03-26 1988-10-26 コウパーミル　リミテッド 熱再生器
JPH06163068A (ja) * 1992-11-16 1994-06-10 Fujikura Ltd 固体電解質型燃料電池スタック
JPH11264677A (ja) * 1998-03-18 1999-09-28 Ishikawajima Harima Heavy Ind Co Ltd 直交流形バヨネット熱交換器
JP2000111020A (ja) * 1998-09-30 2000-04-18 Hosokawa Micron Corp 熱回収装置
JP2001280863A (ja) * 2000-03-29 2001-10-10 Ebara Corp 熱交換器及び該熱交換器を備えた発電装置
JP2001520360A (ja) * 1998-10-14 2001-10-30 株式会社荏原製作所 廃棄物燃焼発電方法及び装置
JP2002081871A (ja) * 2000-09-05 2002-03-22 Mitsui Eng & Shipbuild Co Ltd 空気加熱器
WO2003073031A1 (fr) * 2002-02-26 2003-09-04 Wärtsilä Finland Oy Systeme d'echangeur thermique et procede utilise dans un echangeur thermique
JP2012097991A (ja) * 2010-11-04 2012-05-24 Covalent Materials Corp 熱交換器
WO2014182255A2 (fr) * 2013-05-06 2014-11-13 Žilinská Univerzita V Žiline Equipement d'echange de chaleur de produits de combustion-eau
EP3165863A1 (fr) * 2015-11-04 2017-05-10 Linde Aktiengesellschaft Récupération de chaleur perdue

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3016132U (ja) * 1995-03-08 1995-09-26 株式会社プランテック 低温腐食防止装置を備えた空気加熱装置
JP2002081872A (ja) * 2000-09-05 2002-03-22 Mitsui Eng & Shipbuild Co Ltd 空気加熱器

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259385A (ja) * 1987-03-26 1988-10-26 コウパーミル　リミテッド 熱再生器
JPH06163068A (ja) * 1992-11-16 1994-06-10 Fujikura Ltd 固体電解質型燃料電池スタック
JPH11264677A (ja) * 1998-03-18 1999-09-28 Ishikawajima Harima Heavy Ind Co Ltd 直交流形バヨネット熱交換器
JP2000111020A (ja) * 1998-09-30 2000-04-18 Hosokawa Micron Corp 熱回収装置
JP2001520360A (ja) * 1998-10-14 2001-10-30 株式会社荏原製作所 廃棄物燃焼発電方法及び装置
JP2001280863A (ja) * 2000-03-29 2001-10-10 Ebara Corp 熱交換器及び該熱交換器を備えた発電装置
JP2002081871A (ja) * 2000-09-05 2002-03-22 Mitsui Eng & Shipbuild Co Ltd 空気加熱器
WO2003073031A1 (fr) * 2002-02-26 2003-09-04 Wärtsilä Finland Oy Systeme d'echangeur thermique et procede utilise dans un echangeur thermique
JP2012097991A (ja) * 2010-11-04 2012-05-24 Covalent Materials Corp 熱交換器
WO2014182255A2 (fr) * 2013-05-06 2014-11-13 Žilinská Univerzita V Žiline Equipement d'echange de chaleur de produits de combustion-eau
EP3165863A1 (fr) * 2015-11-04 2017-05-10 Linde Aktiengesellschaft Récupération de chaleur perdue

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