WO2019208496A1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
WO2019208496A1
WO2019208496A1 PCT/JP2019/017029 JP2019017029W WO2019208496A1 WO 2019208496 A1 WO2019208496 A1 WO 2019208496A1 JP 2019017029 W JP2019017029 W JP 2019017029W WO 2019208496 A1 WO2019208496 A1 WO 2019208496A1
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Prior art keywords
gas flow
heat exchanger
bundle
bundles
gas
Prior art date
Application number
PCT/JP2019/017029
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English (en)
Japanese (ja)
Inventor
絵美 村中
石坂　浩
亮太 落合
伸雄 山根
隆行 齋藤
Original Assignee
三菱日立パワーシステムズ株式会社
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.)
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Application filed by 三菱日立パワーシステムズ株式会社 filed Critical 三菱日立パワーシステムズ株式会社
Priority to CN201980027359.9A priority Critical patent/CN112005073B/zh
Publication of WO2019208496A1 publication Critical patent/WO2019208496A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • F28D7/16—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 in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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 heat exchanger that performs heat exchange between a heat medium and exhaust gas, and is particularly suitable for heat exchange for heat recovery between an air preheater (air heater) and an electric dust collector (EP). It relates to a heat exchanger.
  • Patent Documents 1 and 2 below are conventionally known with respect to a flue gas treatment system that performs treatment of exhaust gas (fumes) from a boiler used in a thermal power plant or the like.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-126646 discloses that in a flue gas treatment apparatus, heat recovery is performed adjacent to the upstream side of the electric dust collector in order to simplify the flue between the heat recovery device and the electric dust collector.
  • the structure which installs a heat exchanger (heat exchanger) is described.
  • the heat recovery unit (4) describes a configuration in which three groups of heat transfer tubes (15) are arranged along the flow direction of the exhaust gas.
  • the flow-path cross-sectional area of the gas from an air preheater is expanded upstream from the heat exchanger tube (15) group, becomes a fixed cross-sectional area in the area
  • the flow path cross-sectional area is enlarged downstream of the group and upstream of the electrostatic precipitator (5).
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2015-127046 describes a configuration in which flue gas from a wet desulfurization tower (2) is collected by a wet electric dust collector (11) in a flue gas processing apparatus.
  • heat exchange is performed in a flue gas heater (13) connected by a first transition flue (16) on the downstream side of the wet electrostatic precipitator (11).
  • the cross-sectional area of the flow path in which the flue gas heater (13) is installed is constant.
  • JP 2000-126646 A (“0020”-“0021”, FIG. 2, FIG. 3, FIG. 5, FIG. 6) Japanese Patent Laying-Open No. 2015-127046 (FIG. 1)
  • FIG. 9 is an explanatory diagram of a heat recovery unit and an electric dust collector in a conventional exhaust gas treatment system.
  • a combustion apparatus such as a boiler of a conventional thermal power plant
  • exhaust gas emitted from an outlet of an air preheater air heater: AH
  • a heat recovery device gas cooler: GC, gas gas heat exchanger: GGH
  • the gas discharged from the heat recovery unit 02 flows into the electrostatic precipitator (EP) 04 through the flue 03. Since GGH02 and EP04 have different optimum gas flow rates, independent structures are adopted.
  • the optimum gas flow rate of GGH02 is about 10 to 12 [m / s]
  • the optimum gas flow rate of EP04 is about 1 to 2 [m / s]. Therefore, in the conventional configuration, after the exhaust gas from the air preheater has a gas flow velocity of 15 [m / s] in the flue 01 having a narrow cross-sectional area, the cross-sectional area is enlarged at the inlet of the GGH02, and the gas flow velocity is increased to 10 To 12 [m / s].
  • the cross-sectional area is narrowed at the outlet of GGH02 to make the gas flow velocity of the flue 03 15 [m / s], and then the cross-sectional area is enlarged at the inlet of EP04 to make the gas flow velocity 1-2 [m / s]. I was trying.
  • AH, GGH, EP, etc. can be added later as required. Can be removed.
  • EP and GGH can be integrated and adjacent to each other in order to shorten the flue, but in Patent Documents 1 and 2, independent EP and GGH are used. Are simply connected. Since the optimum gas flow rate (10 to 12 [m / s]) in the GGH portion and the optimum gas flow rate (1 to 2 [m / s]) in the EP portion are different, in the configuration described in Patent Document 1, After expanding the channel cross-sectional area at the first duct part so that the gas flow rate becomes a predetermined flow rate (10 to 12 [m / s]), a heat transfer tube (GGH) is arranged in the duct part having a constant cross-sectional area. Yes. And the duct part which expands a flow-path cross-sectional area from the exit of GGH is provided, and it has the form where EP is arrange
  • This invention makes it a technical subject to shorten the length of the whole gas flow path, when connecting to the instrument from which the range of the optimal gas flow rate differs from a heat exchanger.
  • the heat exchanger according to claim 1 comprises: A plurality of bundles having heat transfer tubes for exchanging heat between the heat medium and the gas are installed in a region where the flow path cross-sectional area expands along the gas flow direction of the gas introduction portion of the dust collector that removes dust in the gas, Two or more groups of the bundles are arranged along the gas flow direction.
  • the invention according to claim 2 is the heat exchanger according to claim 1,
  • the downstream group of bundles arranged on the downstream side in the gas flow direction has a plurality of bundles with respect to a direction crossing the gas flow direction.
  • the invention according to claim 3 is the heat exchanger according to claim 1 or 2, A member that shields the gas flow from the bundle in the upstream group in the gas flow direction toward the bundle in the downstream group is arranged.
  • the invention according to claim 4 is the heat exchanger according to claim 3,
  • the member that shields the gas flow is arranged in a gap between the bundles of the downstream group or a gap between the bundle and the casing.
  • the invention according to claim 5 is the heat exchanger according to claim 3,
  • the member that shields the gas flow is a baffle member or a box.
  • the invention according to claim 6 is the heat exchanger according to claim 1, A first mounting portion that supports one end of the heat transfer tube, a second mounting portion that supports the other end of the heat transfer tube, and is detachably supported between the first mounting portion and the second mounting portion, Each of the bundles having a connection member that connects the first mounting portion and the second mounting portion when mounted is provided.
  • the invention according to claim 7 is the heat exchanger according to claim 6,
  • the first attachment portion of the upper bundle is supported on the upper surface of the first attachment portion of the lower bundle in the direction of gravity, and the second attachment portion of the upper bundle is supported on the upper surface of the second attachment portion of the lower bundle.
  • the invention according to claim 8 is the heat exchanger according to claim 7, A box that is installed in a gap between the bundles of the downstream group and can stack the bundles, and can support the baffle member; It is provided with.
  • the bundle when connected to a dust collector having a gas flow rate range different from that of the heat exchanger, the bundle is formed along the gas flow direction in the region where the flow passage cross-sectional area is enlarged.
  • heat exchange efficiency can be ensured and the length of the entire gas flow path can be shortened.
  • the efficiency of heat exchange can be improved as compared with the case where the downstream group does not have a plurality of bundles.
  • the gas flow rate is not increased by the member that shields the gas flow, so that the cross-sectional area of the exhaust gas that passes through the bundle of the downstream group is not larger than the cross-sectional area of the upstream exhaust gas. Can be easily controlled within the optimum range.
  • the gap can be closed by the member that shields the gas flow, and when the gas flows, it is possible to restrict the gas from flowing to a region where heat exchange is not performed.
  • the gas flow can be shielded by the baffle member or the box.
  • each mounting portion, connecting member, and bundle can be configured, and the housing on the one side can be reduced.
  • a bundle can be piled up and installed, and installation work and maintenance work can be simplified.
  • a bundle can be piled up and installed, ensuring a clearance gap between bundles by using a box.
  • FIG. 1 is an explanatory diagram of a flue gas treatment system including a heat exchanger of the present invention.
  • FIG. 2 is an explanatory diagram of an introduction portion of the dust collector including the heat exchanger according to the first embodiment of the present invention.
  • FIG. 3 is an explanatory view (perspective view) of the heat exchanger according to the first embodiment of the present invention.
  • 4 is an explanatory view of the bundle of FIG. 3, FIG. 4 (A) is a perspective view, and FIG. 4 (B) is an explanatory view with the casing plate removed.
  • FIG. 5 is an explanatory diagram of a main part of the heat exchanger according to the second embodiment and corresponds to FIG. 2 according to the first embodiment.
  • FIG. 5 is an explanatory diagram of a main part of the heat exchanger according to the second embodiment and corresponds to FIG. 2 according to the first embodiment.
  • FIG. 6 is an explanatory diagram of a main part of the heat exchanger according to the third embodiment and corresponds to FIG. 2 according to the first embodiment.
  • FIG. 7 is an explanatory diagram of a main part of the heat exchanger according to the fourth embodiment and corresponds to FIG. 2 according to the first embodiment.
  • FIG. 8 is an explanatory diagram of another embodiment, FIG. 8A is an explanatory diagram of the modified example 1, FIG. 8B is an explanatory diagram of the modified example 2, and FIG. 8C is an explanatory diagram of the modified example 3.
  • FIG. 8 and FIG. 8D are explanatory diagrams of the fourth modification.
  • FIG. 9 is an explanatory diagram of a heat recovery unit and an electric dust collector in a conventional exhaust gas treatment system.
  • the front-rear direction is the X-axis direction
  • the left-right direction is the Y-axis direction
  • the up-down direction is the Z-axis direction
  • arrows X, -X, Y, -Y The direction indicated by Z and -Z or the indicated side is defined as front, rear, right, left, upper, lower, or front, rear, right, left, upper, and lower, respectively.
  • FIG. 1 is an explanatory diagram of a flue gas treatment system including a heat exchanger of the present invention.
  • the flue gas treatment system (plant) S to which the heat exchanger of Example 1 is applied after exhaust gas from the boiler 1 is introduced into the denitration device 2 and nitrogen oxides in the exhaust gas are removed, The air preheater (A / H) 3 exchanges heat with the combustion air to the boiler 1.
  • the exhaust gas is introduced into a GGH heat recovery unit 4 as an example of a gas gas heat exchanger, and heat exchange (heat recovery) is performed.
  • the exhaust gas whose gas temperature has decreased after passing through the GGH heat recovery device 4 is introduced into a dust collector (EP: Electrostatic Precipitator, EP) 5 in a state where the electrical resistance value of the dust in the gas has decreased, and the exhaust gas Most of the dust inside is removed. Thereafter, the exhaust gas is pressurized by a fan 6 and introduced into a wet flue gas desulfurization device (FGD: FGD) 7, and sulfur oxides and part of soot and dust in the exhaust gas are removed by gas-liquid contact.
  • a dust collector EP: Electrostatic Precipitator, EP
  • FGD wet flue gas desulfurization device
  • the exhaust gas cooled to the saturated gas temperature is heated by a GGH reheater 8 as an example of a gas gas heat exchanger using the heat recovered by the GGH heat recovery device 4 ( Heat exchange, reheating).
  • the exhaust gas that has passed through the GGH reheater 8 is discharged from the chimney 9.
  • FIG. 2 is an explanatory diagram of an introduction portion of the dust collector including the heat exchanger according to the first embodiment of the present invention.
  • the GGH heat recovery device 4 according to the first embodiment is disposed inside an inlet duct (gas introduction portion) 11 of the dust collector 5.
  • the inlet duct 11 has a housing 12 whose flow path cross-sectional area increases as it goes downstream in the gas flow direction.
  • the flow rate of the exhaust gas in the inlet duct 11 is an example of the optimum gas flow rate of the main body of the dust collector 5 determined in advance from 15 [m / s] which is an example of the flow rate of the flue.
  • the housing 12 is formed in a shape that expands toward the downstream side so as to be [m / s].
  • the GGH heat recovery device 4 includes a bundle 21 having a plurality of heat transfer tubes that perform heat exchange between the heat medium and the gas.
  • the bundle 21 has a gas flow rate range that is optimal for heat exchange, which is determined in advance by design and specification, and is set to 10 to 12 [m / s] as an example.
  • bundles 21 are arranged on the upstream side and the downstream side with respect to the gas flow direction (horizontal direction in the first embodiment).
  • two bundles 21 (21a, 21b) are arranged in the upstream group 22, and two bundles 21 (21c, 21d) are arranged in the downstream group 23 as well.
  • the bundle 21 of the upstream group 22 is arranged in a region where the flow velocity in the inlet duct 11 is 10 to 12 [m / s].
  • the two bundles 21 are arranged side by side in the vertical direction (the direction intersecting the gas flow direction), and the upper bundle 21b is stacked on the lower bundle 21a.
  • a lower bundle 21c and an upper bundle 21d are arranged with a gap in the vertical direction.
  • an empty box 24 as an example of a box is placed on the upper stage of the lower bundle 21c, and a gap is formed between the bundles 21c and 21d by placing the upper bundle 21d on the empty box 24. Yes.
  • baffle plate 26 which is an example of a member that shields a gas flow and is an example of a baffle member, is installed.
  • the baffle plate 26 extends from the upper bundle 21b of the upstream group 22 toward the bundles 21c and 21d of the downstream group 23 while being inclined with respect to the horizontal direction. Therefore, in the first embodiment, two baffle plates 26 are used.
  • FIG. 3 is an explanatory view (perspective view) of the heat exchanger according to the first embodiment of the present invention.
  • two baffle plates 26 of the first embodiment are supported by welding or bolting to a frame (steel frame) 51 at the upstream end, and the downstream end is a frame upstream of each bundle 21c, 21d. 51 is supported by welding or the like. Therefore, the baffle plate 26 has a function of guiding the exhaust gas flowing through the inlet duct 11. Further, the region 27 surrounded by the two baffle plates 26 and the empty box 24 hardly enters when the exhaust gas flows from upstream (the gas does not flow through the region 27).
  • the flow passage cross-sectional area of the exhaust gas passing through the bundle 21 of the downstream group 23 is hardly enlarged, and even if the gas flow rate is lower than that on the upstream side, it can be kept within the range of the optimum gas flow rate of the bundle 21. .
  • the baffle plate 26 is inclined with respect to the horizontal so that the downstream group 23 is within the range of the optimum gas flow velocity (so that the gas flow path cross-sectional area is substantially the same between the upstream side and the downstream side in the duct).
  • An angle, a length in the gas flow direction, a width in the horizontal direction, and the like are set.
  • each bundle 21 includes a first header 42 as an example of a first attachment portion and a second header 43 as an example of a second attachment portion.
  • the first header 42 and the second header 43 of the first embodiment are formed in a column shape extending in the vertical direction.
  • Each of the headers 42 and 43 is formed in a shape in which the inside is hollow and the upper end and the lower end are closed, and a flowable space is formed inside.
  • Each header 42 and 43 supports a mounting plate 44 that projects in the left-right direction.
  • Heat transfer tubes 45 and 46 extending rearward are supported on the rear surfaces of the headers 42 and 43.
  • the heat transfer tubes 45 and 46 are configured to bend at the rear end or the front end inside the housing 12 and reciprocate in the front-rear direction a plurality of times.
  • Each header 42 and 43 supports a plurality of heat transfer tubes 45 and 46 at intervals in the vertical direction. Both ends of each heat transfer tube 45, 46 are supported by headers 42, 43, so that a heat medium can enter and leave the heat transfer tubes 45, 46 from the headers 42, 43.
  • Each of the heat transfer tubes 45 and 46 is supported by a support member 47 at the center in the front-rear direction.
  • the support member 47 is formed in a shape in which a plurality of holes through which the heat transfer tubes 45 and 46 pass are formed in the plate. Therefore, the heat transfer tubes 45 and 46 are not supported in a cantilever state only by the headers 42 and 43, but are held by the headers 42 and 43 and the support member 47.
  • one support member 47 is illustrated in the front-rear direction and the left-right direction, a plurality of support members 47 are provided in the front-rear direction or a plurality are provided in the left-right direction, depending on the length of the heat transfer tubes 45, 46. It is also possible.
  • plug holes 48 are formed in the headers 42 and 43 at positions corresponding to the heat transfer tubes 45 and 46.
  • the plug hole 48 is a hole penetrating in the front-rear direction, and the rear end is connected to the inlet or outlet of the heat transfer tubes 45, 46.
  • the front end of the plug hole 48 is closed with a plug (not shown) during normal use.
  • the plug hole 48 is removed, and the inlet or outlet of the heat transfer tubes 45 and 46 is closed with a plug (not shown) through the plug hole 48. It is possible to stop the leakage of the heat medium.
  • the casing board 49 as an example of a connection member is supported so that attachment or detachment is possible.
  • the casing plate 49 has a height corresponding to the height in the vertical direction of the headers 42 and 43.
  • the casing plate 49 is detachably supported on the mounting plate 44 by bolts (not shown).
  • the method of fixing the casing plate 49 to the mounting plate 44 so as to be detachable is not limited to bolts.
  • any detachable fixing method in which the casing plate 49 and the headers 42 and 43 are fillet welded and attached and removed by gouging or the like can be employed. Therefore, when the casing plate 49 is attached, the headers 42 and 43 are connected. Therefore, when the casing plate 49 is attached, the headers 42 and 43 and the heat transfer tubes 45 and 46 are integrated with high rigidity, and leakage of exhaust gas from between the headers 42 and 43 is suppressed.
  • the bundle 21 of the first embodiment is configured by the members having the reference numerals 42 to 49.
  • the bundle 21 is configured as a single unit. Accordingly, the unitized bundles 21 can be stacked up and down at the headers 42 and 43. That is, it is possible to pile up by placing the lower surfaces of the headers 42 and 43 of the upper bundle 21b on the upper surfaces of the headers 42 and 43 of the lower bundle 21a. It is also possible to install the headers 42 and 43 by placing them on a frame (steel frame) 51. In addition, although illustration is abbreviate
  • the unitized bundles 21 may be stored one by one in a box-shaped housing whose upstream and downstream sides in the gas flow direction are opened, or a plurality of bundles 21 may be stored together in one housing. Is possible. By setting it as the bundle 21 accommodated in the box-shaped housing, it becomes still easier to stack the bundle 21 so that boxes may be stacked, and the installation of the bundle 21 becomes easier.
  • the heat exchanger (GGH heat recovery device) 4 according to the first embodiment having the above-described configuration is disposed in the inlet duct 11 of the dust collector 5. And in the area
  • Example 1 the heat exchanger 4 can be installed in the inlet duct 11 of the dust collector 5. Therefore, a flue connecting the heat exchanger and the dust collector is not required as in the conventional configuration. Therefore, when the heat exchanger 4 is connected to the dust collector 5, which is an instrument having an optimum range of gas flow velocity, the length of the entire gas flow path can be shortened. Therefore, the entire exhaust gas treatment system can be reduced in size. In particular, in an existing exhaust gas treatment system that does not have the heat exchanger 4, when the heat exchanger 4 is to be added later, the heat exchanger 4 is incorporated into the inlet duct 11 of the dust collector 5. The heat exchanger 4 can be added. Therefore, even when a space for adding a heat exchanger as in the conventional configuration shown in FIG. 9 cannot be secured in the existing exhaust gas treatment system, the heat exchanger 4 of Example 1 can be added.
  • the inlet duct 11 of the dust collector 5 is perforated as a channel resistance when the gas flow rate cannot be reduced to the optimum gas flow rate only by increasing the cross-sectional area of the inlet duct 11.
  • An iron plate punching plate
  • Example 1 since the heat exchanger 4 itself installed in the gas flow path also serves as flow path resistance, it is possible to completely eliminate or reduce the punching plate. Thus, the punching plate can be reduced and the cost can be reduced.
  • the heat exchanger 4 according to the first embodiment can install the heat exchanger 4 by stacking the bundles 21 and can reduce the installation cost and the installation period compared to the conventional configuration in which the heat exchanger 4 cannot be stacked. it can. In addition, the work at the time of replacement due to failure or the like is facilitated, and the maintenance cost can be reduced. In addition, by using the empty box 24, it is possible to stack and install even when it is desired to arrange with a gap between the bundles 21, which can be easily handled.
  • FIG. 5 is an explanatory diagram of a main part of the heat exchanger according to the second embodiment and corresponds to FIG. 2 according to the first embodiment.
  • the heat exchanger 4 of the second embodiment is different from the first embodiment in that three bundles 21 are installed in the downstream group 23. Three bundles 21 are arranged along the direction of gravity intersecting the gas flow direction. Two empty boxes 24 are installed between the three bundles 21.
  • a baffle plate 26 is disposed on the upstream side of each empty box 24 with respect to the gas flow direction.
  • Example 2 In the heat exchanger 4 of Example 2 provided with the said structure, it has the same effect as Example 1.
  • FIG. That is, the baffle plate 26 controls the three bundles 21 arranged in the enlarged area of the cross-sectional area of the inlet duct 11 of the dust collector 5 so that the gas flow rate is within the optimum gas flow rate range. Therefore, the efficiency of heat exchange in the three bundles 21 is ensured, and the dust collection efficiency of the dust collector 5 is also secured.
  • the heat exchanger 4 can be installed in the inlet duct 11, and the entire exhaust gas treatment system can be downsized. In addition, it is possible to reduce punching plates and maintenance costs by stacking.
  • FIG. 6 is an explanatory diagram of a main part of the heat exchanger according to the third embodiment and corresponds to FIG. 2 according to the first embodiment.
  • the three bundles 21 of the downstream group 23 are, in order from the bottom, an empty box 24, a bundle 21, a bundle 21, a bundle 21, and an empty box.
  • a baffle plate 26 is installed between the upper end of the uppermost bundle 21 and the housing of the inlet duct 11, and between the lower end of the lowermost bundle 21 and the housing of the inlet duct 11.
  • the baffle plate 26 according to the third embodiment is disposed substantially along the gas flow direction.
  • the third embodiment having the above-described configuration has the same operational effects as the first and second embodiments. That is, heat exchange efficiency and dust collection efficiency are ensured, and the exhaust gas treatment system can be downsized.
  • the configuration in which the bundles 21 are stacked is illustrated. However, there may be a slight gap between the bundles 21 or between the bundles 21 and the empty boxes 24. It is not necessary.
  • positions the baffle plate 26 also substantially along a gas flow direction was illustrated, it is not limited to this.
  • the gas flow rate in the bundle 21 becomes the optimum gas flow rate for heat exchange, and the gas flow rate in the dust collector 5 can be adjusted within the range that becomes the optimum gas flow rate for dust collection. Therefore, the two baffle plates 26 can be arranged in a divergent shape or arranged so as to be narrowed. Further, the downstream end of the baffle plate 26 may be supported by the empty box 24 instead of the bundle 21.
  • FIG. 7 is an explanatory diagram of a main part of the heat exchanger according to the fourth embodiment and corresponds to FIG. 2 according to the first embodiment.
  • the upstream group 22 is composed of one bundle 21 and the downstream group 23 is also composed of one bundle 21.
  • downstream group 23 is stacked in the order of the empty box 24, the bundle 21, and the empty box 24 from the lower stage.
  • a baffle plate 26 is installed between the upper end of the bundle 21 of the downstream group 23 and the housing of the inlet duct 11, and between the lower end of the bundle 21 and the housing of the inlet duct 11.
  • the baffle plate 26 according to the fourth embodiment is disposed so as to narrow toward the downstream side with respect to the gas flow direction.
  • the fourth embodiment having the above configuration has the same operational effects as the first to third embodiments. That is, heat exchange efficiency and dust collection efficiency are ensured, and the exhaust gas treatment system can be downsized.
  • FIG. 8 is an explanatory diagram of another embodiment
  • FIG. 8A is an explanatory diagram of the modified example 1
  • FIG. 8B is an explanatory diagram of the modified example 2
  • FIG. 8C is an explanatory diagram of the modified example 3.
  • FIG. 8 and FIG. 8D are explanatory diagrams of the fourth modification.
  • the configuration in which the wall surface of the inlet duct 11 widens toward the end is illustrated, but the present invention is not limited to this.
  • one wall surface 11a of the inlet duct 11 is inclined so that the cross-sectional area of the channel increases with respect to the gas flow direction as it goes downstream
  • the wall surface 11b can also have a shape along the gas flow direction.
  • the upstream group 22 and the downstream group 23 are arranged at intervals along the inclined wall surface 11a, and the baffle plate is placed on the wall surface 11b along the gas flow.
  • a configuration in which 26 and an empty box 24 are installed is also possible.
  • the upstream group 22 and the downstream group 23 can be configured by a single bundle 21 as shown in FIG. 8A, or by a plurality of bundles 21 as shown in FIG. 8B. It is also possible. Further, there may or may not be a gap between the bundles 21 and between the bundle 21 and the empty box 24.
  • the upstream group 22 and the downstream group 23 are arranged at intervals along the wall surface 11b along the gas flow, and the baffle plate 26 is disposed on the inclined wall surface 11a.
  • a configuration in which an empty box 24 is installed is also possible.
  • the upstream group 22 and the downstream group 23 can also be configured by a single bundle 21 as shown in FIG. 8C, or by a plurality of bundles 21 as shown in FIG. 8D. It is also possible.
  • the heat exchanger 4 is illustrated as being installed in the inlet duct 11 of the dust collector 5, but is not limited thereto.
  • it can be installed in a region where the optimum gas flow rate of the heat exchanger 4 is obtained in the exit duct portion of the air preheater 3 which is a device having a different optimum gas flow rate.
  • the heat recovery device was illustrated as the heat exchanger 4, it is not limited to this, It is also possible to apply to the heat exchanger installed in other places, such as the GGH reheater 8.
  • the plate-like member is exemplified as the member that shields the gas flow, but is not limited thereto.
  • an arbitrary configuration such as a box-like or block-like member having the outer shape of the region 27 can be adopted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un échangeur de chaleur (4) caractérisé en ce qu'une pluralité de poignées (21) pourvues de tuyaux de transfert de chaleur (45, 46) qui effectuent un échange de chaleur entre un milieu de chauffage et un gaz sont placées dans une région dans laquelle une zone en coupe du trajet d'écoulement s'étend le long d'une direction d'écoulement de gaz d'une partie d'introduction de gaz (11) dans un dispositif de collecte de poussière (5) qui élimine la poussière d'un gaz, et les poignées (21) sont disposées selon une ligne d'au moins deux groupes le long de la direction d'écoulement du gaz. Grâce à l'échangeur de chaleur (4), il est possible de réduire la longueur globale d'un trajet d'écoulement de gaz lorsque l'échangeur de chaleur est relié à un appareil ayant une plage optimale de vitesses d'écoulement de gaz différente de celle de l'échangeur de chaleur.
PCT/JP2019/017029 2018-04-23 2019-04-22 Échangeur de chaleur WO2019208496A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022163860A1 (fr) * 2021-02-01 2022-08-04 三菱重工業株式会社 Échangeur de chaleur et système de traitement de gaz de combustion

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000126646A (ja) * 1998-10-22 2000-05-09 Babcock Hitachi Kk 排煙処理装置と熱回収器
JP2002079027A (ja) * 2000-09-06 2002-03-19 Nkk Corp 集塵部を備えた排ガス減温塔
JP2012180958A (ja) * 2011-02-28 2012-09-20 Mitsubishi Heavy Ind Ltd 熱交換器
US20130192540A1 (en) * 2010-01-18 2013-08-01 Volker Schüle System for combined flue gas heat recovery and dust precipitation improvement as retrofit solution for existing coal-fired power stations
JP2013202422A (ja) * 2012-03-27 2013-10-07 Babcock Hitachi Kk 石炭焚ボイラの燃焼排ガス処理方法及び装置
JP2015036614A (ja) * 2013-08-16 2015-02-23 三菱重工環境・化学エンジニアリング株式会社 熱交換器の付着物除去方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5023996B2 (ja) * 2007-11-26 2012-09-12 日本軽金属株式会社 電子機器収納箱および電子機器試験箱
JP5854777B2 (ja) * 2011-11-16 2016-02-09 三菱日立パワーシステムズ株式会社 排ガス処理装置
CN102679556A (zh) * 2012-05-30 2012-09-19 无锡锡能锅炉有限公司 燃水煤浆锅炉尾部受热面结构组件
US9644511B2 (en) * 2012-09-06 2017-05-09 Mitsubishi Hitachi Power Systems, Ltd. Combustion gas cooling apparatus, denitration apparatus including the combustion gas cooling apparatus, and combustion gas cooling method
US9890672B2 (en) * 2012-09-06 2018-02-13 Mitsubishi Hitachi Power Systems, Ltd. Combustion gas cooling apparatus, denitration apparatus having the combustion gas cooling apparatus, and combustion gas cooling method
US10532930B2 (en) * 2016-07-21 2020-01-14 Haldor Topsoe A/S Method for production of sulfuric acid from sulfur containing feeds with gas quenching
CN107020004A (zh) * 2017-05-25 2017-08-08 浙江富春江环保热电股份有限公司 一种等离子体辅助氨水吸收燃煤烟气同时脱硫脱硝脱碳的装置和方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000126646A (ja) * 1998-10-22 2000-05-09 Babcock Hitachi Kk 排煙処理装置と熱回収器
JP2002079027A (ja) * 2000-09-06 2002-03-19 Nkk Corp 集塵部を備えた排ガス減温塔
US20130192540A1 (en) * 2010-01-18 2013-08-01 Volker Schüle System for combined flue gas heat recovery and dust precipitation improvement as retrofit solution for existing coal-fired power stations
JP2012180958A (ja) * 2011-02-28 2012-09-20 Mitsubishi Heavy Ind Ltd 熱交換器
JP2013202422A (ja) * 2012-03-27 2013-10-07 Babcock Hitachi Kk 石炭焚ボイラの燃焼排ガス処理方法及び装置
JP2015036614A (ja) * 2013-08-16 2015-02-23 三菱重工環境・化学エンジニアリング株式会社 熱交換器の付着物除去方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022163860A1 (fr) * 2021-02-01 2022-08-04 三菱重工業株式会社 Échangeur de chaleur et système de traitement de gaz de combustion

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TWI704013B (zh) 2020-09-11

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