WO2015001666A1 - Chaudière à récupération - Google Patents

Chaudière à récupération Download PDF

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Publication number
WO2015001666A1
WO2015001666A1 PCT/JP2013/068528 JP2013068528W WO2015001666A1 WO 2015001666 A1 WO2015001666 A1 WO 2015001666A1 JP 2013068528 W JP2013068528 W JP 2013068528W WO 2015001666 A1 WO2015001666 A1 WO 2015001666A1
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WO
WIPO (PCT)
Prior art keywords
heat
resistant wall
boiler
process gas
casing
Prior art date
Application number
PCT/JP2013/068528
Other languages
English (en)
Japanese (ja)
Inventor
朝彦 白石
祐太 横山
泉 西本
大橋　俊樹
優史 種村
Original Assignee
川崎重工業株式会社
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 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to PCT/JP2013/068528 priority Critical patent/WO2015001666A1/fr
Priority to CN201420178706.2U priority patent/CN204084298U/zh
Priority to CN201410147794.4A priority patent/CN104279541A/zh
Publication of WO2015001666A1 publication Critical patent/WO2015001666A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1838—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Definitions

  • the present invention relates to a waste heat boiler that recovers heat from process gas in a plant.
  • a facility in which a raw material is burned in a combustion furnace to generate a process gas, and then a desired product is manufactured from the process gas. Further, in order to effectively use the thermal energy of the process gas, it has been conventionally performed to provide a waste heat boiler for recovering heat from the process gas and using it for power generation or the like on the downstream side of the combustion furnace.
  • Sulfuric acid production facility generally includes a converter for generating a combustion furnace to generate a process gas comprising SO 2 gas by burning sulfur, which was oxidized SO 2 gas using a V 2 O 5 catalyst SO 3 gas
  • An absorption tower that reacts SO 3 gas with H 2 O to produce H 2 SO 4 (sulfuric acid).
  • heat is recovered from the process gas between the combustion furnace and the converter to generate high-pressure steam from the boiler water.
  • a waste heat boiler to be generated is provided.
  • the waste heat boiler is provided with a casing such as a shell and a heat transfer tube arranged inside the casing.
  • boilers used as waste heat boilers for sulfuric acid production facilities include natural-circulation water pipe boilers (hereinafter referred to as heat exchangers such as boiler water) that flow through heat transfer tubes and process gases flow around the heat transfer tubes.
  • heat exchangers such as boiler water
  • smoke tube boilers there are two types of tube-type smoke tube boilers (hereinafter also simply referred to as smoke tube boilers), in which process gas flows inside the heat transfer tubes and boiler water flows around the heat transfer tubes. It was adopted.
  • the smoke tube boiler has the advantage of a simple structure compared to the water tube boiler.
  • a high-pressure heat medium such as boiler water flows inside the shell.
  • the capacity of the manufacturing equipment increases, the capacity of the waste heat boiler increases due to an increase in process gas and the shell of the smoke tube boiler becomes large, the thickness of the shell of the smoke tube boiler increases to withstand the pressure from the heat medium.
  • the cost of the waste heat boiler may increase.
  • a smoke tube boiler in a water tube boiler, high-pressure water / steam flows inside a heat transfer tube with a small diameter, so that the thickness of the heat transfer tube can be reduced to a realistic one. Can be easily accommodated.
  • a smoke tube boiler is generally adopted in a small manufacturing facility, and a water tube boiler is advantageous in a large manufacturing facility.
  • a smoke tube boiler is usually employed.
  • the size of sulfuric acid production facilities is increasing. For this reason, it is necessary to employ a water pipe boiler in the sulfuric acid production facility.
  • Patent Document 1 proposes to use a waste heat boiler composed of a vertical water tube boiler in order to recover the heat of process gas generated in an ammonia production facility.
  • a very high temperature process gas for example, about 1000 ° C. can be supplied to the waste heat boiler.
  • high heat resistance is required for the casing of the waste heat boiler.
  • a fireproof heat insulating layer having heat resistance is provided on the inner surface of the casing.
  • the process gas supplied to the waste heat boiler may be not only high temperature but also high pressure.
  • a sulfuric acid production facility in order to prevent SO 3 rich gas from reaching the converter, at a predetermined pressure from the waste heat boiler toward the converter, for example, a positive pressure of about 0.5 atm (about 5000 mmH 2 O). Process gas needs to be fed.
  • a predetermined pressure from the waste heat boiler toward the converter for example, a positive pressure of about 0.5 atm (about 5000 mmH 2 O).
  • Process gas needs to be fed.
  • not only heat resistance but also pressure resistance is required for the casing of the waste heat boiler.
  • the casing since the process gas contains SO 2 gas and some water vapor, the casing is required to have not only the above heat resistance and pressure resistance but also the corrosion resistance.
  • the present invention has been made in consideration of such points, and provides a waste heat boiler composed of a vertical water tube boiler that can be used in a large-scale manufacturing facility where high-temperature and high-pressure process gas is generated. With the goal.
  • the present invention is a waste heat boiler for recovering heat from process gas in a plant,
  • a casing having a circular cross section extending in the vertical direction, a heat-resistant wall disposed inside the casing and extending in the vertical direction, penetrating through the casing and connected to the heat-resistant wall and surrounded by the heat-resistant wall.
  • An inlet duct for supplying a process gas to the space, and a plurality of heat transfer tubes disposed in the space surrounded by the heat-resistant wall and through which a heat medium is passed, wherein the heat transfer tube heats the process gas.
  • the waste heat boiler is configured such that the vapor of the heat medium generated by absorbing the heat can flow upward due to the difference in specific gravity between the heat medium and the liquid heat medium.
  • a space surrounded by the heat-resistant wall has a first flue extending in the vertical direction and a second smoke extending in the vertical direction and passing through the process gas after passing through the first flue. It may be divided into roads.
  • the heat-resistant wall includes a plurality of cooling pipes through which a cooling medium passes and fins attached to the cooling pipes so as to fill gaps between the two adjacent cooling pipes. And may have.
  • the waste heat boiler according to the present invention is connected to the lower ends of the plurality of heat transfer tubes, and is connected to the distribution header that distributes the liquid heat medium to the heat transfer tubes, and to the upper ends of the plurality of heat transfer tubes, and heat of the process gas And an assembly header that collects the heat medium evaporated by each heat transfer tube.
  • each of the distribution header and the assembly header is disposed in a space surrounded by the heat-resistant wall.
  • an intermediate pipe penetrating the casing and the heat-resistant wall may be connected to the distribution header and the collective header.
  • a portion of the casing through which the intermediate pipe passes may be covered from the outside by a gas sealing member.
  • the part which the said intermediate piping penetrates among the said heat-resistant walls may have a curved shape corresponding to the outline of the said intermediate piping, and may be comprised by the cooling pipe which lets a cooling medium pass inside.
  • the waste heat boiler according to the present invention may further include a support mechanism for supporting the heat transfer tube.
  • the support mechanism may include a support tube suspended from above and a support member connected to the support tube and supporting the heat transfer tube from below.
  • a heat medium may be passed through the support tube of the support mechanism.
  • the heat-resistant wall includes a plurality of cooling pipes through which a cooling medium passes and fins attached to the cooling pipes so as to fill gaps between the two adjacent cooling pipes. And may have.
  • the waste heat boiler is connected to lower ends of the plurality of cooling pipes, and is connected to a lower header that distributes a cooling medium in a liquid state to the respective cooling pipes, and upper ends of the plurality of cooling pipes.
  • An upper header that collects the cooling medium evaporated by heat from each cooling pipe may be further provided.
  • the support pipe of the support mechanism is supported by the upper header.
  • the heat-resistant wall may have a rectangular cross section.
  • a reinforcing plate may be attached to the inner surface of the casing, and the reinforcing plate may be disposed at a certain interval from the outer surface of the heat-resistant wall.
  • a baffle plate extending in a horizontal direction may be provided in a space between the inner surface of the casing and the outer surface of the heat-resistant wall.
  • the waste heat boiler includes a casing that extends in the vertical direction and has a circular cross section, and a heat-resistant wall that is disposed inside the casing and extends in the vertical direction.
  • the high temperature process gas is supplied to the space surrounded by the heat resistant wall. For this reason, it is possible to suppress the heat of the process gas from being transmitted to the casing by the heat resistant wall. Therefore, it is not necessary for the casing to have high heat resistance, which can increase the degree of freedom in designing the casing.
  • the differential pressure between the process gas and the atmospheric pressure acts on the casing, but does not act on the heat resistant wall.
  • the heat-resistant wall it is not necessary for the heat-resistant wall to have a high pressure resistance, which can increase the degree of freedom in designing the heat-resistant wall.
  • a design method in which a casing is designed mainly considering pressure resistance and a heat resistant wall is designed mainly considering heat resistance. That is, the pressure resistance and heat resistance required for the waste heat boiler can be ensured by two different components. For this reason, the upper limit of the pressure resistance and heat resistance which a waste heat boiler can achieve can be raised. This makes it possible to provide a large vertical water tube boiler that can be used under severe conditions.
  • a large vertical water tube boiler can be employed under conditions where high pressure resistance, heat resistance and corrosion resistance are required for a waste heat boiler such as a large sulfuric acid production facility. Therefore, the safety of the entire waste heat boiler and the ease of manufacturing and installing the waste heat boiler can be improved.
  • FIG. 1 is a longitudinal sectional view showing a waste heat boiler according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a casing and a heat-resistant wall of the waste heat boiler shown in FIG.
  • FIG. 3 is a longitudinal sectional view showing a reinforcing plate provided between the casing and the heat-resistant wall.
  • FIG. 4 is a longitudinal sectional view showing a baffle plate provided between the casing and the heat-resistant wall.
  • FIG. 5 is a side view showing a heat transfer tube arranged in a space surrounded by a heat-resistant wall.
  • FIG. 6 is a view showing a support tube and a support member for supporting the heat transfer tube shown in FIG. 5.
  • FIG. 5 is a side view showing a heat transfer tube arranged in a space surrounded by a heat-resistant wall.
  • FIG. 6 is a view showing a support tube and a support member for supporting the heat transfer tube shown in FIG. 5.
  • FIG. 5 is a side
  • FIG. 7 is a plan view showing a case where an upper header provided on the upper portion of the waste heat boiler is viewed from above.
  • FIG. 8 is a diagram illustrating an example of a method of connecting the distribution header and the assembly header to a branch pipe outside the casing.
  • FIG. 9 is a diagram illustrating a state in which the intermediate pipe passes through the heat-resistant wall and is connected to the distribution header and the assembly header.
  • FIGS. 1 to 9 elements that represent the same function may be denoted by the same reference numerals and description thereof may be omitted.
  • FIG. 1 is a longitudinal sectional view showing a waste heat boiler 10 installed in a production facility where a high-temperature and high-pressure process gas is generated, such as a sulfuric acid production facility or an ammonia production facility.
  • FIG. 2 is a cross-sectional view showing the casing 20 and the heat-resistant wall 30 of the waste heat boiler 10 shown in FIG.
  • the case where the waste heat boiler 10 is installed in the sulfuric acid production facility will be described.
  • Waste heat boiler Waste heat boiler 10 is introduced with a high-temperature and high-pressure process gas containing SO 2 gas generated by burning sulfur using a combustion furnace.
  • arrows with reference numerals f 1 to f 5 represent the flow direction of the process gas introduced into the waste heat boiler 10.
  • heat is recovered from the process gas flowing in the vertical direction. That is, the waste heat boiler 10 is a vertical type.
  • the present invention is not limited to this, and the technical idea of the present invention may be applied to a horizontal waste heat boiler that recovers heat from a process gas flowing in a horizontal direction.
  • the waste heat boiler 10 extends in a vertical direction (vertical direction), has a casing 20 having a circular cross section, and a heat-resistant wall that is disposed inside the casing 10 and extends in the vertical direction. 30 and an inlet duct 11 for supplying process gas to the inside of the waste heat boiler 10, and an outlet duct 12 for sending the process gas after heat recovery from the inside of the waste heat boiler 10 to the converter. ing.
  • the casing 20 is configured to be able to stand on its own.
  • FIG. 2 although the example in which the casing 20 has a perfect circular cross section is shown, it is not restricted to this.
  • Various shapes can be adopted as the cross-sectional shape of the casing 20 as long as the pressure difference between the process gas and the atmospheric pressure can be withstood.
  • the casing 20 may have an elliptical cross section.
  • the heat-resistant wall 30 is disposed on the inlet duct 11 side and extends in the longitudinal direction
  • the front wall 31 is disposed on the outlet duct 12 side
  • the rear wall 32 extends in the longitudinal direction.
  • the first side wall 33 and the second side wall 34 are disposed between the wall 31 and the rear wall 32 and extend in the vertical direction.
  • the front wall 31, the rear wall 32, the first side wall 33, and the second side wall 34 each have a planar shape.
  • the heat-resistant wall 30 has a rectangular cross section, for example, a square cross section.
  • the term “planar” means that elements constituting the walls 31 to 34, for example, a cooling pipe 35 and fins 36, which will be described later, are arranged on the same plane.
  • the heat-resistant wall 30 can be easily manufactured and installed by combining the walls 31 to 34. In addition, by making the cross section of the heat resistant wall 30 rectangular, the space surrounded by the heat resistant wall 30 can be utilized without waste.
  • the inlet duct 11 penetrates the casing 20 and is connected to the front wall 31 of the heat-resistant wall 30.
  • the outlet duct 12 also penetrates the casing 20 and is connected to the rear wall 32 of the heat-resistant wall 30 in the same manner as the inlet duct 11.
  • the heat transfer tube 60 for recovering the heat of the process gas is disposed in a space surrounded by the heat-resistant wall 30 from the side. In this case, the process gas supplied to the waste heat boiler 10 exchanges heat with the heat medium passed through the heat transfer tube 60 while mainly flowing in the space surrounded by the heat-resistant wall 30. Then, it is sent toward the converter from the outlet duct 12.
  • the casing 20 does not need to have high heat resistance.
  • the structure of the casing 20 can be simplified compared with the case where high heat resistance is required for the casing.
  • a refractory material and a heat insulating material are provided on the inner surface of the casing in order to impart heat resistance and fire resistance to the casing.
  • such a refractory material and a heat insulating material can be made unnecessary. As a result, the cost required for production and maintenance of the casing 20 can be reduced. Moreover, the weight of the casing 20 can be reduced, and thereby the self-supporting property and the earthquake resistance of the casing 20 can be improved.
  • the heat-resistant wall 30 does not have to be completely airtight. That is, the space between the casing 20 and the heat-resistant wall 30 and the space surrounded by the heat-resistant wall 30 may partially communicate with each other. For example, the process gas may leak from the inside of the heat-resistant wall 30 to the outside in a portion where an intermediate pipe described later passes through the heat-resistant wall 30. Even in this case, since the flow path resistance of the space surrounded by the heat resistant wall 30 is significantly lower than the flow path resistance in the portion where the intermediate pipe passes through the heat resistant wall 30, the process gas mainly contains the heat resistant wall 30. Will flow through the space surrounded by.
  • the pressures in the two spaces are substantially the same.
  • the structure of the heat-resistant wall 30 can be simplified, or the degree of freedom in designing the heat-resistant wall 30 can be increased.
  • a rectangular shape can be adopted as described above.
  • the front wall 31, the rear wall 32, the first side wall 33, and the second side wall 34 of the heat-resistant wall 30 respectively extend in the vertical direction and have a plurality of cooling pipes 35 through which a cooling medium passes.
  • fins 36 attached to the respective cooling pipes 35 so as to fill a gap between the two adjacent cooling pipes 35.
  • the fin 36 is attached to each cooling pipe 35 by welding, for example.
  • As the cooling medium passed through the cooling pipe 35 for example, boiler water, that is, saturated water or air-water mixed water is used.
  • the walls 31 to 34 of the heat-resistant wall 30 are configured as so-called water walls.
  • the heat of the process gas can be recovered by the boiler water passing through the cooling pipes 35 of the walls 31 to 34, the heat of the process gas flowing through the space surrounded by the heat resistant wall 30 is transmitted to the casing 20. Can be further suppressed. Moreover, since the heat of process gas can be collect
  • the configuration for passing the cooling medium through each cooling pipe 35 of the heat-resistant wall 30 is not particularly limited, and various configurations can be adopted.
  • a lower header 46 for distributing a cooling medium in a liquid state to each cooling pipe 35 is connected to the lower end of each cooling pipe 35 constituting the front wall 31 and the rear wall 32, and
  • An upper header 47 that collects the cooling medium evaporated by the heat of the process gas from each cooling pipe 35 may be connected to the upper end of each cooling pipe 35.
  • the cooling medium can be efficiently supplied to the plurality of cooling pipes 35 and the cooling medium can be efficiently recovered from the plurality of cooling pipes 35.
  • the lower header and the upper header are also connected to the lower end and the upper end of each cooling pipe 35 constituting the first side wall 33 and the second side wall 34, respectively.
  • the process gas discharged from the first flue P1 reverses its traveling direction at the upper part of the casing 20, as indicated by an arrow f3. Thereafter, the process gas flows downward along the second flue P2 as indicated by an arrow f4.
  • the process gas that has reached the lower portion of the waste heat boiler 10 is discharged by the outlet duct 12 as indicated by an arrow f5.
  • two flues extending in the vertical direction are formed inside one trunk (casing).
  • Such a form is also referred to as one-body two-time flow.
  • the length of the flue formed inside one casing 20 can be doubled in the case of the single cylinder single flow, so that the heat transfer tubes 60 arranged in the flue can be provided. It is possible to recover the heat of the process gas sufficiently. For this reason, the energy efficiency of the waste heat boiler 10 can be improved.
  • the length of the flue of the process gas can be reduced while suppressing the height of the casing 20 and the heat-resistant wall 30 from becoming too large by adopting a one-cylinder and two-turn flow. It can be secured sufficiently. Thereby, the self-supporting property of the casing 20 and the ease of manufacturing and installing the casing 20 and the heat-resistant wall 30 can be ensured. Further, for comparison, a case where one waste heat boiler 10 includes two casings, that is, a case of two-cylinder two-way flow will be considered. In this case, the length of the flue of the process gas can be sufficiently secured by using a casing having almost the same height as that in the present embodiment.
  • the length of the flue of the process gas is sufficiently secured while the cost required for the production of the waste heat boiler 10 is kept low by adopting the double flow of one cylinder. Can do.
  • an intermediate wall 38 is provided between the front wall 31 and the rear wall 32.
  • the intermediate wall 38 is configured to shield the flow of process gas in the horizontal direction.
  • the intermediate wall 38 includes a vertical portion 38a extending in the vertical direction.
  • the vertical portion 38a extends in the vertical direction and includes a plurality of cooling pipes 35 through which a cooling medium passes, and two adjacent cooling pipes 35. And fins 36 attached to the respective cooling pipes 35 so as to fill the gaps therebetween.
  • each cooling pipe 35 constituting the intermediate wall 38 is connected to the lower header 46 at a place where the lower end of each cooling pipe 35 constituting the front wall 31 is connected to the lower header 46. May be.
  • the intermediate wall 38 can have a lower surface portion 38c extending from the vertical portion 38a toward the front wall 31 in the lower portion of the first flue P1.
  • the process gas supplied from the inlet duct 11 to the first flue P1 passes through the lower part of the waste heat boiler 10 to the second. Reaching the flue P2 or the outlet duct 12 can be prevented.
  • the lower header 46 to which the lower end of each cooling pipe 35 constituting the intermediate wall 38 is connected may be the same as the lower header 46 to which the lower end of each cooling pipe 35 constituting the front wall 31 is connected, Or they may be different.
  • the upper end of each cooling pipe 35 constituting the intermediate wall 38 is connected to the upper header 47 at a place where the upper end of each cooling pipe 35 constituting the rear wall 32 is connected to the upper header 47. It may be connected. Thereby, the place where the cooling medium is collected from each cooling pipe 35 constituting the rear wall 32 and the place where the cooling medium is collected from each cooling pipe 35 constituting the intermediate wall 38 can be brought close to each other.
  • the structure for taking out the vapor of the cooling medium can be simplified. In this case, as shown in FIG.
  • the intermediate wall 38 has an upper surface portion 38b extending from the vertical portion 38a toward the rear wall 32 in the upper portion of the first flue P1.
  • the process gas discharged from the first flue P1 must be reversed and flow into the second flue P2.
  • the upper surface portion 38b is configured to allow the process gas to pass therethrough.
  • the fins 36 described above are not provided between the cooling pipes 35 constituting the upper surface portion 38b. As a result, the process gas can pass through the upper surface portion 38b of the intermediate wall 38 and flow into the second flue P2.
  • the process gas discharged from the first flue P1 comes into direct contact with the inner surface of the upper part of the casing 20.
  • the upper part of the casing 20 may have high heat resistance.
  • the casing 20 is positioned below the upper end of the heat-resistant wall 30, and the vertical portion 21 extending in the vertical direction is in contact with the process gas that is folded after being discharged from the first flue P ⁇ b> 1. It may be configured by combining the folded portion 22.
  • the folded portion 22 may be provided with a refractory material and a heat insulating material on the inner surface for imparting heat resistance and fire resistance.
  • the vertical portion 21 does not need to have high heat resistance, the structure of the vertical portion 21 is simpler than the folded portion 22. As a result, the cost and weight of the entire casing 20 can be reduced as compared with the case where the entire casing 20 has heat resistance and fire resistance.
  • returning part 22 is not specifically limited, For example, a castable anchor, a heat insulation caster, a fireproof caster etc. can be used.
  • a maintenance manhole may be provided in the folded portion 22.
  • the heat of the process gas is recovered to some extent in the first flue P ⁇ b> 1 until reaching the turn-up portion 22.
  • the temperature of the process gas supplied from the inlet duct 11 is about 1000 ° C.
  • the temperature of the process gas that has reached the folded portion 22 is about 600 ° C. Therefore, the structure of the folded portion 22 is simple. For this reason, the above-described manhole for maintenance can be easily provided in the folded-back portion 22 as compared with the conventional case.
  • the process gas leaking from the heat-resistant wall 30 may slightly reach the inner surface of the vertical portion 21 of the casing 20.
  • the process gas contains SO 2 gas as described above, and the process gas may contain a small amount of water vapor.
  • the temperature of the inner surface of the vertical portion 21 is below the acid dew point, and as a result, the sulfuric acid gas is condensed and the vertical portion 21 A drop of sulfuric acid may appear on the inner surface.
  • a heat insulating member 23 may be provided in the vertical portion 21 as shown in FIG. Thereby, it can suppress that the temperature of the inner surface of the vertical part 21 falls below an acid dew point. Thereby, it can suppress that the inner surface of the vertical part 21 is damaged by corrosion.
  • FIG. 5 is an enlarged side view showing the heat transfer tube 60 shown in FIG.
  • the heat transfer tube 60 allows the heat medium vapor generated by absorbing the heat of the process gas to flow upward due to the specific gravity difference between the heat transfer tube 60 and the liquid heat medium existing inside the heat transfer tube 60. It is configured. As shown in FIG. 1, the heat transfer tube 60 meanders in a plane parallel to the flow direction of the process gas, that is, in a plane extending in the vertical direction in order to realize efficient heat exchange with the process gas. It may extend in a shape. In this case, the overall shape of the heat transfer tube 60 can also be expressed as a panel shape. For example, in FIG. 2 mentioned above and FIG. 8 shown later, the heat transfer tube 60 is drawn in a panel shape.
  • heat transfer tube panel a comprehensive shape formed by the heat transfer tubes extending in a serpentine shape
  • a plane formed by the heat transfer tube panels is sometimes referred to as a “heat transfer tube panel surface”.
  • the heat transfer tube 60 has a plurality of straight tube portions 61 extending linearly and a plurality of folded portions that connect two adjacent straight tube portions 61.
  • the folded portion is connected to the end of the two adjacent straight pipe portions 61 on the inlet duct 11 side (front wall 31 side), and has a first folded portion 62 having a substantially U-shape and two adjacent two
  • the straight pipe portion 61 is connected to an end portion on the outlet duct 12 side (rear wall 32 side) and includes a second folded portion 63 having a substantially U-shape.
  • the heat transfer tube panel surface described above is formed by alternately arranging the plurality of straight tube portions 61 and the plurality of folded portions 62 and 63 in a plane extending in the vertical direction.
  • each straight pipe portion 61 of the heat transfer tube 60 extends in a direction inclined with respect to the horizontal direction. For this reason, the vapor of the heat medium can flow upward along the heat transfer tube 60 based on the difference between the specific gravity of the heat medium in the gas state and the specific gravity of the heat medium in the liquid state.
  • the heat medium passed through the heat transfer tube 60 for example, boiler water is used as in the case of the cooling medium passed through the cooling tube 35 of the heat-resistant wall 30. In this case, the vapor of the heat medium, that is, water vapor flows upward along the heat transfer tube 60 due to the specific gravity difference between water and water vapor.
  • the configuration for passing the heat medium through the heat transfer tube 60 is not particularly limited, and various configurations can be adopted.
  • a distribution header 41 for supplying a liquid heat medium to the heat transfer tube 60 is connected to the lower end of the heat transfer tube 60, and a process header is connected to the upper end of the heat transfer tube 60.
  • a collective header 42 that collects the heat medium evaporated by the heat of the gas from the heat transfer tube 60 may be connected.
  • a plurality of, for example, three heat transfer tubes 60 are provided in the surface of one heat transfer tube panel, and the distribution header 41 and the assembly header having the same lower end and upper end of each heat transfer tube 60 are provided. 42 may be connected.
  • Each heat transfer tube 60 may be connected to the distribution header 41 and the assembly header 42 via the short tube 41a and the short tube 42a.
  • the short pipe 41a and the short pipe 42a are connected to the distribution header 41, the assembly header 42, and the heat transfer pipe 60 by welding, for example.
  • a plurality of heat transfer tubes 60 are arranged along the normal direction of the heat transfer tube panel surface, and the lower ends of the heat transfer tubes 60 constituting each heat transfer tube panel and The upper end may be connected to the same distribution header 41 and collective header 42. That is, the heat transfer tube panel group which consists of a some heat transfer tube panel may be arrange
  • a plurality of heat transfer tube panel groups may be arranged along the flow direction of the process gas, that is, along the vertical direction.
  • three heat transfer tube panel groups are arranged in the vertical direction in the first flue P1
  • two heat transfer tube panel groups are arranged in the vertical direction in the second flue P2.
  • the number of straight pipe portions 61 of the heat transfer tubes 60 constituting each heat transfer tube panel is determined according to the temperature of the process gas at the position where the heat transfer tubes 60 are arranged.
  • the high-temperature process gas generated in the combustion furnace is supplied to the first flue P1.
  • each heat transfer tube 60 can generate
  • the process gas after a certain amount of heat is recovered while passing through the first flue P1 is supplied to the second flue P2.
  • the heat transfer tube 60 located on the upper side of the second flue P2 has a four-stage straight pipe portion 61, and the heat transfer tube 60 located on the lower side of the second flue P2 has six stages.
  • a straight pipe portion 61 is provided.
  • the boiler water circulation system 15 includes an air water cylinder 16 that houses boiler water 19 and high-pressure steam of the boiler water, and a downcomer pipe 17 for sending the boiler water 19 in the air water cylinder 16 toward the cooling pipe 35 and the heat transfer pipe 60. And a return pipe 18 for returning the steam of boiler water generated in the cooling pipe 35 and the heat transfer pipe 60 to the air / water cylinder 16.
  • the air / water cylinder 16 is further connected to a pipe for extracting the generated high-pressure steam and a pipe for replenishing the boiler water 19 to the air / water cylinder 16.
  • the downpipe 17 and the return pipe 18 each extend in the vertical direction.
  • a plurality of branch pipes 17 a extending toward the lower header 46 and the distribution header 41 are connected to the downcomer pipe 17 in order to supply the boiler water 19 to the lower header 46 and the distribution header 41 described above.
  • a plurality of branch pipes 18 a extending toward the upper header 47 and the collective header 42 are connected to the return pipe 18 in order to collect steam of boiler water from the above-described upper header 47 and collective header 42.
  • boiler water 19 from each branch pipe 17a toward the lower header 46 and the distribution header 41 is indicated by a one-dot chain line arrow.
  • the steam of the boiler water which goes to each branch pipe 18a from the top header 47 and the assembly header 42 is also shown with the dashed-dotted arrow.
  • FIG. 8 is a cross-sectional view showing a case where the waste heat boiler 10 is cut by a horizontal plane passing through the distribution header 41 and the assembly header 42.
  • the distribution header 41 and the assembly header 42 are each disposed in a space surrounded by the heat-resistant wall 30.
  • a heat transfer tube module can be manufactured by combining the distribution header 41, the assembly header 42 and the heat transfer tube 60 in advance in a factory or the like. Thereby, the work at the installation site of the waste heat boiler 10 can be facilitated.
  • one end of an intermediate pipe 43 that penetrates the casing 20 and the heat-resistant wall 30 is connected to the end of the distribution header 41 by, for example, welding.
  • a branch pipe 17a is connected to the other end of the intermediate pipe 43 by, for example, welding.
  • the branch pipe 17 a and the distribution header 41 are communicated with each other, and boiler water can be supplied to the distribution header 41.
  • one end of an intermediate pipe 44 that penetrates the casing 20 and the heat-resistant wall 30 is connected to the end of the collective header 42 by, for example, welding.
  • a branch pipe 18a is connected to the other end of the intermediate pipe 44 by, for example, welding. Thereby, the branch pipe 18a and the collective header 42 are communicated with each other, and the steam of the boiler water can be recovered from the collective header 42.
  • a portion of the casing 20 through which the intermediate pipes 43 and 44 penetrate may be covered with a gas sealing member 45 from the outside. Thereby, it is possible to prevent the process gas from leaking out of the casing 20 from the portion of the casing 20 through which the intermediate pipes 43 and 44 penetrate.
  • a gas sealing member 45 for example, a metal for gas sealing made of a general steel material such as SS400 can be used.
  • a portion of the heat-resistant wall 30 through which the intermediate pipes 43 and 44 penetrate has a curved shape corresponding to the outline of the intermediate pipes 43 and 44, and a cooling pipe through which a cooling medium is passed. 35 may be comprised. That is, as shown in FIG. 9, the intermediate pipes 43 and 44 penetrate by partially bending the cooling pipe 35 to form a curved portion 35 a having a curved shape corresponding to the contour of the intermediate pipes 43 and 44. A hole that can be formed may be formed in the heat-resistant wall 30.
  • the intermediate pipes 43 and 44 can be passed through the heat-resistant wall 30 while maintaining the cooling function and the heat recovery function based on the cooling pipe 35.
  • the structure for connecting the branch pipe 17a and the lower header 46 and the structure for connecting the branch pipe 18a and the upper header 47 are the same as those in the case of the distribution header 41 and the assembly header 42 described above. Similarly, a structure using the intermediate pipes 43 and 44 may be employed.
  • FIG 8 shows an example in which the end on the first side wall 33 side of the distribution header 41 and the assembly header 42 is connected to the branch pipe 17a and the branch pipe 18a, but is not limited thereto.
  • the end of the distribution header 41 and the assembly header 42 on the second side wall 34 side is also connected to a branch pipe 17a and a branch pipe 18a different from those connected to the end of the first side wall 33 side. It may be connected. That is, boiler water may be supplied from both ends of the distribution header 41, and steam of boiler water may be recovered from both ends of the assembly header 42.
  • FIG. 1 and FIG. 5 a support mechanism that supports the heat transfer tube 60 is denoted by reference numeral 50.
  • FIG. 6 is an enlarged view of the support mechanism 50 shown in FIGS. 1 and 5.
  • the support tube 51 of the support mechanism 50 is represented by a dotted line in order to prevent the drawing from becoming complicated.
  • the support mechanism 50 includes a support tube 51 suspended from above, and a support member 52 connected to the support tube 51 and supporting the straight tube portion 61 of the heat transfer tube 60 from below.
  • a support member 52 By supporting the heat transfer tube 60 using the support tube 51 and the support member 52, the heat transfer tube 60 can be stably supported over the entire region in the vertical direction.
  • support members 52 may be connected to both sides of the support tube 51.
  • the support tube 51 can support the heat transfer tube panels on both sides thereof (see FIG. 2).
  • FIG. 2 the background of using such a support mechanism 50 will be described.
  • the support of the heat transfer tube 60 is realized by connecting the folded portions 62 and 63 of the heat transfer tube 60 to the inner surface of the container of the waste heat boiler.
  • hooks configured to be connectable to each other are attached to both the folded portions 62 and 63 and the inner surface of the container.
  • the heat transfer tube 60 can be supported by using the support tube 51 suspended from above. For this reason, the heat transfer tube 60 maintained in the final installation posture can be carried into the heat resistant wall 30 from above.
  • the support mechanism 50 includes a support beam 53 disposed on the upper portion of the waste heat boiler 10, a suspension bar 54 coupled to the support beam 53 and hanging from the support beam 53, and a lower end of the suspension bar 54. And attached hanging metal fittings 55.
  • the support pipe 51 can be suspended from above by connecting the suspension fitting 55 to the support pipe 51.
  • FIG. 7 is a plan view showing the upper header 47 provided above the heat-resistant wall 30 as viewed from above.
  • the cooling pipe 35 and the support pipe 51 are indicated by dotted lines in order to show the positional relationship between the upper header 47 and the support beam 53 and the cooling pipe 35 and the support pipe 51.
  • an upper header 47 assembled in a well shape is disposed on the upper portion of the waste heat boiler 10.
  • the upper header 47 assembled in a well shape is disposed so as to intersect the upper header 47a connected to the cooling pipe 35 constituting the front wall 31 and the rear wall 32, and to intersect the upper header 47a.
  • the support beam 53 of the support mechanism 50 is arrange
  • a fixture 56 to which the support tube 51 is connected is attached to the support beam 53.
  • a fixture for fixing the support beam 53 to the upper header 47 such as a bolt and a nut, may be provided.
  • a pair of support beams 53 arranged at a predetermined interval is used for a plurality of support tubes 51 arranged in a line from the first side wall 33 toward the second side wall 34. May be.
  • a cooling medium or a heat medium that can recover heat from the process gas, such as boiler water, is passed through the support pipe 51.
  • a lower header and an upper header for supplying boiler water to the support pipe 51 and recovering steam of the boiler water from the support pipe 51 may be connected to the support pipe 51.
  • the lower end of the support pipe 51 is the same as the lower header 46 connected to the lower end of the cooling pipe 35 of the heat-resistant wall 30, or the lower header disposed in the vicinity of the lower header 46. It may be connected to.
  • the upper end of the support pipe 51 is connected to the same upper header 47 as the upper header 47 connected to the upper end of the cooling pipe 35 of the heat-resistant wall 30 or an upper header disposed in the vicinity of the upper header 47. Also good.
  • the load caused by the load of the heat transfer tube 60 and the load of the support tube 51 is applied to the support beam 53.
  • the support beam 53 is disposed on the upper portion of the waste heat boiler 10, and a certain amount of heat is recovered in the upper portion of the waste heat boiler 10 while passing through the first flue P1 as described above. Later process gas arrives. For example, a process gas of about 600 ° C. arrives.
  • the material which comprises the support beam 53 does not use the material which has especially high heat resistance, but can use the material which has normal heat resistance.
  • general heat resistant steel such as SUS304 can be used.
  • the heat transfer tube 60 can be suspended with a simple configuration.
  • FIG. 2 shows a cross-sectional view when the waste heat boiler 10 is cut by a horizontal plane passing through the reinforcing mechanism 24.
  • the casing 20 has a circular cross section
  • the heat-resistant wall 30 has a rectangular cross section. That is, the shape of the cross section of the casing 20 and the shape of the cross section of the heat-resistant wall 30 are different from each other. Accordingly, the distance between the inner surface of the casing 20 and the outer surface of the heat-resistant wall 30 is large at a specific location. As a result, it is considered that the heat-resistant wall 30 greatly fluctuates in the horizontal direction at a specific place. In order to prevent such fluctuation, a reinforcing mechanism 24 for suppressing fluctuation of the heat-resistant wall 30 may be attached to the inner surface of the casing 20 as shown in FIG.
  • FIG. 3 is a longitudinal sectional view showing the reinforcing mechanism 24 in an enlarged manner.
  • the reinforcing mechanism 24 includes a reinforcing plate 24 a that is disposed at a certain distance from the outer surface of the heat-resistant wall 30.
  • the reinforcing mechanism 24 further includes a reinforcing member 24b having one end fixed to the inner surface of the casing 20 and the other end fixed to the reinforcing plate 24a.
  • the reinforcing plate 24 a functions as a stopper against fluctuation of the heat resistant wall 30. Therefore, the heat resistant wall 30 can be prevented from greatly fluctuating in the horizontal direction. That is, the rigidity of the entire waste heat boiler 10 can be increased.
  • a reinforcing mechanism 37 for suppressing fluctuation of the heat-resistant wall 30 may also be provided on the heat-resistant wall 30 side.
  • the reinforcing mechanism 37 includes, for example, a reinforcing plate 37a disposed at a predetermined interval from the reinforcing plate 24a, and a reinforcing member 37b fixed to the reinforcing plate 37a and the cooling pipe 35. Thereby, the fluctuation
  • the distance between the reinforcing plate 24a and the reinforcing plate 37a is, for example, in the range of 10 to 15 mm.
  • the reinforcing mechanism 24 and the reinforcing mechanism 37 disposed between the casing 20 and the heat resistant wall 30 have high heat resistance. Is not required.
  • a general material can be used as a material which comprises the reinforcement mechanism 24 and the reinforcement mechanism 37, for example, common steel materials, such as SS400, can be used.
  • baffle plate 26 that extends in the horizontal direction and is disposed in the space between the casing 20 and the heat-resistant wall 30 will be described.
  • the intermediate pipes 43 and 44 are penetrated through the heat-resistant wall 30. For this reason, it is not possible to completely prevent the process gas from leaking from the heat-resistant wall 30. Therefore, it is considered that a certain amount of process gas leaks from the heat resistant wall 30 in the space between the casing 20 and the heat resistant wall 30.
  • the baffle plate 26 described above is provided to prevent such process gas from flowing in the vertical direction.
  • a specific configuration for providing the baffle plate 26 is not particularly limited, for example, as shown in FIG. 4, a mounting plate 26 a and a mounting plate 26 b are respectively provided on the inner surface of the casing 20 and the cooling pipe 35 of the heat-resistant wall 30.
  • the baffle plate 26 may be provided on the mounting plate 26a and the mounting plate 26b.
  • each baffle plate 26 may be connected to a drain pipe (not shown) for discharging condensed water on the baffle plate 26. Thereby, it is possible to prevent the condensed water from accumulating on the baffle plate 26.
  • a module is manufactured by combining a plurality of components constituting the waste heat boiler 10.
  • the plurality of heat transfer tubes 60 are connected to the distribution header 41 and the assembly header 42 using a welding method or the like.
  • a heat transfer tube group in which the distribution header 41 and the assembly header 42 are combined can be manufactured.
  • each heat transfer tube 60 of the heat transfer tube group is attached to the support tube 51 via the support member 52. In this manner, a heat transfer tube module in which the heat transfer tube 60, the distribution header 41, the assembly header 42, and the support mechanism 50 are combined can be manufactured.
  • the heat-resistant wall 30 may be manufactured by connecting the cooling pipe 35 and the fin 36 by welding. Further, the cooling pipe 35 and the lower header 46 and the upper header 47 may be connected to manufacture a heat resistant wall module.
  • the vertical portion 21 of the casing 20 is self-supported.
  • the above-mentioned heat resistant wall module is carried into the space inside the vertical portion 21.
  • the above-described heat transfer tube module is carried into the space surrounded by the heat resistant wall 30 from above, and the heat transfer tube module is attached to the heat resistant wall 30.
  • the support beam 53 of the support mechanism 50 of the heat transfer tube module is fixed on the upper header 47 assembled in a well shape. In this way, the plurality of heat transfer tubes 60 can be easily installed in the space surrounded by the heat resistant wall 30.
  • the intermediate pipes 43 and 44 are passed through the casing 20, and the intermediate pipes 43 and 44 are welded to the distribution header 41, the assembly header 42, the lower header 46, and the upper header 47. Further, the folded portion 22 is disposed on the vertical portion 21. In this way, the waste heat boiler 10 configured as a vertical water tube boiler can be obtained.
  • Process gas flow rate 130000 Nm 3 / h
  • Process gas pressure 5000 mmH2O
  • Process gas composition SO 2 11%, O 2 10%, N 2 79%, H 2 O 0.01% -Process gas temperature in the inlet duct: 1000 ° C -Process gas temperature at the folded part: 600 ° C -Process gas temperature at outlet duct: 410 ° C ⁇
  • Operating pressure of waste heat boiler 6 MPag -Steam temperature of boiler water: 400 ° C ⁇
  • Power generation 16MW
  • the process gas at 600 ° C. discharged upward from the first flue P1 is folded back by the folded portion 22 of the casing 20, flows into the second flue P2, and flows downward along the second flue P2. .
  • the heat of the process gas is recovered by the heat transfer pipe 60 and the cooling pipe 35 disposed in the second flue P2.
  • the recovered heat is used for power generation using a steam turbine.
  • attained the lower part of the waste heat boiler 10 is discharged
  • the SO 2 gas is oxidized using a V 2 O 5 catalyst to generate SO 3 gas.
  • the process gas is sent to the converter without passing through the second flue P2 of the waste heat boiler 10. May be.
  • a bypass duct 13 that sends out process gas toward the converter may be provided in the folded portion 22 of the waste heat boiler 10 as indicated by an arrow f ⁇ b> 6.
  • the temperature of the process gas supplied to the converter can be maintained at a desired temperature.
  • the outlet duct 12 and the bypass duct 13 respectively The damper 12a and the damper 13a which can adjust a flow volume may be provided.
  • the bypass method is a mode in which a high-temperature (about 1000 ° C.) process gas is taken out from the smoke tube boiler and sent to the converter. Will be adopted.
  • a high-temperature process gas since a high-temperature process gas must be handled, it is difficult to design a damper for adjusting the flow rate.
  • the process gas can be taken out from the middle of the water tube boiler and sent out to the converter. For example, as described above, it is possible to take out the process gas at about 600 ° C. that has reached the folded portion 22. For this reason, compared with the case of a smoke tube boiler, the design of the damper 13a for adjusting a flow volume becomes easy.
  • H 2 SO 4 sulfuric acid
  • a gas cooler for cooling the SO 3 gas may be provided between the converter and the absorption tower.
  • the waste heat boiler 10 is formed in a double structure using a heat-resistant wall 30 that defines a space through which the process gas passes and a casing 20 that is disposed around the heat-resistant wall 30.
  • a thermal load caused by the temperature of the process gas is applied to the heat-resistant wall 30, while a pressure load caused by the difference between the pressure of the process gas and the atmospheric pressure is applied to the casing 20.
  • the heat resistance requirement and the pressure resistance requirement can be shared by the heat resistant wall 30 and the casing 20, respectively.
  • simplification of each structure of the heat-resistant wall 30 and the casing 20 is realizable.
  • the weight of the waste heat boiler 10 as a whole can be reduced.
  • the durability and safety of the waste heat boiler 10 as a whole can be improved.
  • the enlargement of the waste heat boiler 10 can be realized, and this makes it possible to cope with an increase in capacity of the sulfuric acid production facility.
  • the waste heat boiler 10 can be configured using a vertical water tube boiler. For this reason, a heat medium such as boiler water can be circulated naturally without using a pump or the like. Therefore, even if the sulfuric acid production facility is installed in an area where power supply is unstable, the waste heat boiler 10 can be stably operated. Further, the waste heat boiler 10 capable of natural circulation has an advantage that its operation work and maintenance work are easier than a waste heat boiler using forced circulation. Moreover, in areas where power supply is unstable, such as emerging countries, generally, the skill level of the operator who operates the sulfuric acid production facility and the waste heat boiler 10 is low. Considering these points, the waste heat boiler 10 according to the present embodiment has a high demand for sulfuric acid, and therefore, the waste heat boiler is required to be enlarged, and the operation work and the maintenance work are also required to be simplified. It is especially suitable for emerging countries.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

Le problème décrit par la présente invention est de fournir une chaudière à récupération qui comprend une chaudière à tuyaux d'eau verticaux susceptible d'être utilisée dans une installation de production à grande échelle qui génère un gaz de procédé à haute température et haute pression. La solution selon l'invention consiste en une chaudière à récupération (10) conçue sous la forme d'une structure double qui utilise : un boîtier s'étendant verticalement (20) possédant une coupe transversale circulaire ; et une paroi résistante à la chaleur s'étendant verticalement (30) disposée au sein du boîtier (20). En outre, la chaudière à récupération (10) comporte un conduit d'admission (11) qui pénètre à travers le boîtier (20), est relié à la paroi résistante à la chaleur (30), et fournit un gaz de procédé à un espace entouré par la paroi résistante à la chaleur (30). Des tuyaux de transfert thermique (60) sont disposés dans l'espace entouré par la paroi résistante à la chaleur (30).
PCT/JP2013/068528 2013-07-05 2013-07-05 Chaudière à récupération WO2015001666A1 (fr)

Priority Applications (3)

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PCT/JP2013/068528 WO2015001666A1 (fr) 2013-07-05 2013-07-05 Chaudière à récupération
CN201420178706.2U CN204084298U (zh) 2013-07-05 2014-04-14 废热锅炉
CN201410147794.4A CN104279541A (zh) 2013-07-05 2014-04-14 废热锅炉

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
JP2018508739A (ja) * 2015-02-12 2018-03-29 安徽海螺川崎工程有限公司 余熱ボイラ
US10907822B2 (en) 2015-02-12 2021-02-02 Anhui Conch Kawasaki Engineering Company Limited Waste heat boiler
EP3819538A1 (fr) * 2019-11-08 2021-05-12 General Electric Company Supports refroidis multiples pour tubes d'échange de chaleur dans un échangeur de chaleur
IT202200015270A1 (it) * 2022-07-20 2024-01-20 Nuovo Pignone Tecnologie Srl Generatore di vapore a recupero di calore a fasci paralleli

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015001666A1 (fr) * 2013-07-05 2015-01-08 川崎重工業株式会社 Chaudière à récupération

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US3183969A (en) * 1962-02-28 1965-05-18 Foster Wheeler Corp Heat exchangers
JPH08226606A (ja) * 1995-02-22 1996-09-03 Ishikawajima Harima Heavy Ind Co Ltd ボイラの伝熱管支持構造
JPH1161156A (ja) * 1997-08-26 1999-03-05 Ishikawajima Harima Heavy Ind Co Ltd 石炭ガス化用対流型ガス冷却器
JP2004176934A (ja) * 2002-11-22 2004-06-24 Toyo Radiator Co Ltd 蒸気発生装置

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CN101639212B (zh) * 2009-08-21 2011-01-05 苏州海陆重工股份有限公司 余热锅炉
WO2015001666A1 (fr) * 2013-07-05 2015-01-08 川崎重工業株式会社 Chaudière à récupération

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Publication number Priority date Publication date Assignee Title
US3183969A (en) * 1962-02-28 1965-05-18 Foster Wheeler Corp Heat exchangers
JPH08226606A (ja) * 1995-02-22 1996-09-03 Ishikawajima Harima Heavy Ind Co Ltd ボイラの伝熱管支持構造
JPH1161156A (ja) * 1997-08-26 1999-03-05 Ishikawajima Harima Heavy Ind Co Ltd 石炭ガス化用対流型ガス冷却器
JP2004176934A (ja) * 2002-11-22 2004-06-24 Toyo Radiator Co Ltd 蒸気発生装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018508739A (ja) * 2015-02-12 2018-03-29 安徽海螺川崎工程有限公司 余熱ボイラ
EP3258168A4 (fr) * 2015-02-12 2019-02-20 Anhui Conch Kawasaki Engineering Company Limited Chaudière à récupération de chaleur
US10907822B2 (en) 2015-02-12 2021-02-02 Anhui Conch Kawasaki Engineering Company Limited Waste heat boiler
EP3819538A1 (fr) * 2019-11-08 2021-05-12 General Electric Company Supports refroidis multiples pour tubes d'échange de chaleur dans un échangeur de chaleur
US11519597B2 (en) 2019-11-08 2022-12-06 General Electric Company Multiple cooled supports for heat exchange tubes in heat exchanger
IT202200015270A1 (it) * 2022-07-20 2024-01-20 Nuovo Pignone Tecnologie Srl Generatore di vapore a recupero di calore a fasci paralleli

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