US20200056840A1 - Cold box structure with cold box panels partly built-in and installation method therefor - Google Patents
Cold box structure with cold box panels partly built-in and installation method therefor Download PDFInfo
- Publication number
- US20200056840A1 US20200056840A1 US16/610,205 US201716610205A US2020056840A1 US 20200056840 A1 US20200056840 A1 US 20200056840A1 US 201716610205 A US201716610205 A US 201716610205A US 2020056840 A1 US2020056840 A1 US 2020056840A1
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- United States
- Prior art keywords
- cold box
- support frame
- plate
- heat exchanger
- fin heat
- Prior art date
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- Abandoned
Links
- 238000009434 installation Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 9
- 239000010962 carbon steel Substances 0.000 claims description 9
- 235000019362 perlite Nutrition 0.000 claims description 8
- 239000010451 perlite Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04945—Details of internal structure; insulation and housing of the cold box
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/10—Buildings forming part of cooling plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
- F25D3/102—Stationary cabinets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04854—Safety aspects of operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
Definitions
- the present invention relates to a cold box structure for a plate-fin heat exchanger and an installation method therefor, which are particularly suitable for a high-pressure aluminum plate-fin heat exchanger.
- the plate-fin heat exchanger has the characteristics of compact structure, light weight, high heat transfer efficiency, etc., and so is widely used in industrial sectors such as refrigeration, petrochemical, air separation, aerospace, power machinery and superconducting, and is generally recognized as one of the new efficient heat exchangers. Due to the low-temperature ductility and good tensile properties of aluminum alloy, plate-fin heat exchangers made of aluminum alloy are particularly suitable for low-temperature and ultra-low-temperature applications, and are also widely used in air separation processes in modern industries. At present, almost all the heat exchangers of air separation apparatuses use plate-fin heat exchangers. Due to operating at a temperature below ⁇ 150° C., the air separation apparatus needs to be placed inside a cold box, and the cold box is filled with perlite sand to provide heat insulation.
- the cold box is in the shape of a rectangular hexahedron, comprising a base, a cold box support frame, four cold box panels and a cold box top plate.
- the cold box panels are welded to the outer side the cold box support frame.
- the cold box can be made of carbon steel or stainless steel, but due to the high price of stainless steel, carbon steel is usually used in practice. However, the carbon steel material is prone to brittle fracture at low temperatures. In the process of air separation, if leakage occurs at a plate-fin heat exchanger and low-temperature steam is ejected, the perlite sand inside the cold box becomes damp and hardened, and the cold box panels or the cold box support frame of carbon steel is easily damaged. Failure to timely discover leakage may result in other serious consequences.
- the cold box panels are placed outside the cold box support frame structure.
- cryogenic steam is ejected if leakage occurs at the plate-fin heat exchanger. If the leaked steam is directly ejected to the cold box support frame, since the cold box panels are located outside the cold box support frame and shield the cold box support frame, the damage caused by the leakage is not easily discovered in a timely manner, which may result in the failure to timely discover leakage in the plate-fin heat exchanger. This is not conducive to the safe operation of air separation systems, resulting in degraded quality of air separation products, which also may cause serious safety accidents; in addition, the repair work for the damaged cold box support frame is huge and the cost is high.
- Certain embodiments of the present invention provide a cold box structure with cold box panels partly built-in, which is applicable to a plate-fin heat exchanger, and in particular to a high-pressure aluminum plate-fin heat exchanger for use in an air separation process.
- the cold box of a carbon steel material in certain embodiments of the present invention is especially applicable to brazed aluminum plate-fin heat exchangers with the working pressure higher than 20 bar. Since leakage easily occurs on the sides of the high-pressure plate-fin heat exchanger where seals are located, and the temperature at the cold end of the heat exchanger is ⁇ 196° C., cryogenic steam ejected due to leakage seriously damages the carbon steel structure, and brittle fracture, etc. may occur.
- cold box panels facing sides of the plate-fin heat exchanger where the seals are located are placed inside the cold box support frame, so that the leakage can be timely discovered from the frost and icing conditions of the cold box panels upon occurring, which has the function of protecting the cold box support frame.
- a cold box structure comprising a base, a cold box support frame, four cold box panels and a cold box top plate, a plate-fin heat exchanger being fixed inside the cold box, wherein the cold box panels facing sides of the plate-fin heat exchanger where seals are located are placed inside the cold box support frame, and perlite sand is filled between the cold box and the plate-fin heat exchanger.
- the cold box support frame, the cold box panels, and the cold box top plate may be made of carbon steel or stainless steel.
- the cold box panels facing sides of the plate-fin heat exchanger where lateral plates are located are placed outside the cold box support frame, and may also be placed inside the cold box support frame.
- An installation method for the cold box structure can include the steps of:
- step 2) of the installation method the cold box panels facing the seals of the plate-fin heat exchanger are installed in advance inside the cold box support frame, or are installed on-site inside the cold box support frame, depending on the on-site installation size.
- the cold box panels are placed outside the cold box support frame, when the ejected cryogenic steam is exactly on the inside cold box support frame, the heat transfer is slower due to the thicker support frame, and the air is not easily condensed; in addition, due to the shielding of the outside cold box panels, it is difficult to discover the leakage situation of the plate-fin heat exchanger.
- FIG. 1 is a schematic view of a plate-fin heat exchanger
- FIG. 2 is a schematic structural view of a cold box support frame
- FIG. 3 is a schematic view of the appearance of a first embodiment of the present invention.
- FIG. 4 is a schematic view of the appearance of a second embodiment of the present invention.
- FIG. 1 is a schematic view of a plate-fin heat exchanger, wherein the sides on which seals of the heat exchanger are located are faces b, b′, and the sides on which lateral plates are located are faces a, a′.
- a plate heat exchanger (in particular a brazed aluminum plate heat exchanger) has a heat exchange portion inside which a plurality of heat exchange passages are disposed.
- the heat exchange passages are formed by alternately stacking partition plates and profiled plates (for example, ribbed plates or corrugated plates, finned plates) or distribution devices, and the heat exchange portion is formed by heating and brazing the stack in a suitable brazing furnace. Under high pressure, leakage easily occurs at the brazed joint, that is, leakage easily occurs at the faces b, b′ on which the seals of the plate-fin heat exchanger are located.
- FIG. 2 shows a schematic view of a cold box support frame 2 , the four sides of which are A, A′, B, B′, respectively.
- the oblique line areas in the figure represent the interior of the cold box support frame on the side A′ and the interior of the cold box support frame on the side B′, respectively, and 1 represents a base.
- the sides B, B′ of the cold box frame are opposite the sides of the plate-fin heat exchanger where seals are located, and sides A, A′ are opposite the sides of the plate-fin heat exchanger where cover plates are located (the plate-fin heat exchanger is not shown in the figure).
- the cold box panels 3 b , 3 b ′ are installed inside the cold box support frames on the sides B and B′, and the cold box panels 3 a , 3 a ′ are installed outside or inside the cold box support frames on the sides A and A′.
- FIG. 3 is a first embodiment of the present invention, comprising a base 1 , a cold box support frame 2 , a cold box top plate 4 , and four cold box panels 3 a , 3 a ′, 3 b , 3 b ′, wherein the oblique line areas in the figure respectively represent the cold box panel 3 a and the cold box panel 3 b ( 3 a ′, 3 b ′ are not visible in the figure).
- the cold box panels 3 b , 3 b ′ are placed inside the cold box support frame 2
- the cold box panels 3 a , 3 a ′ are placed outside the cold box support frame 2 .
- Faces a and a′ of the plate-fin heat exchanger are symmetrical faces of the plate-fin heat exchanger, and faces b and b′ are further symmetrical faces of the plate-fin heat exchanger.
- the sides A and A′ of the cold box frame are symmetrical to each other, and the sides B and B′ are symmetrical to each other.
- the cold box panels 3 a and 3 a ′ are symmetrical to each other, and 3 b and 3 b ′ are symmetrical to each other.
- the interior of the cold box support frame refers to the side of the cold box support frame facing the heat exchanger; and the exterior of the cold box support frame refers to the side of the cold box support frame facing the outside air.
- the cold box panels 3 a , 3 a ′, 3 b , 3 b ′ refer to the panels on four sides of the cold box
- the cold box top plate 4 refers to the panel located at the top of the cold box
- the base 1 refers to a structure located at the bottom of the cold box for supporting the cold box
- the cold box support frame 2 refers to a structure that supports the cold box panels to fix the cold box panels.
- the cold box panels 3 b , 3 b ′ facing the faces b, b′ of the plate-fin heat exchanger are located inside the cold box support frames on the sides B, B′. Since leakage easily occurs at the faces b, b′ of the plate-fin heat exchanger, the cold box panels 3 b , 3 b ′ facing the faces b, b′ are built inside the cold box support frame, which can prevent leaked steam from being directly ejected to the cold box support frame, thereby having a protection function. In addition, the leakage can be discovered timely.
- the cold box panels 3 a , 3 a ′ facing the faces a, a′ of the plate-fin heat exchanger are located outside the cold box support frame on the sides A, A′. Since leakage doesn't easily occur at the faces a, a′ of the plate-fin heat exchanger, in order to reduce installation difficulty, the cold box panels 3 a , 3 a ′ are installed outside the cold box support frame.
- FIG. 4 is a second embodiment of the present invention, comprising a base 1 , a cold box support frame 2 , a cold box top plate 4 , and four cold box panels 3 a , 3 a ′, 3 b , 3 b ′, wherein the oblique line areas in the figure respectively represent the cold box panel 3 a and the cold box panel 3 b ( 3 a ′, 3 b ′ are not visible in the figure).
- the four cold box panels 3 a , 3 a ′, 3 b , 3 b ′ are all placed inside the cold box support frame 2 .
- the cold box structure comprises the cold box panels 3 a , 3 a ′, 3 b , 3 b ′ placed inside the cold box support frame, wherein the cold box panels 3 a , 3 a ′ are placed inside the cold box support frame on sides A, A′, and the cold box panels 3 b , 3 b ′ are placed inside the cold box support frame on sides B, B′.
- the cold box support frame and the cold box panels are made of carbon steel or stainless steel.
- the cold box panels 3 a , 3 a ′, 3 b , 3 b ′ are installed inside the cold box support frame on sides B, B′.
- the cold box panels 3 a , 3 a ′ facing lateral plates of the plate-fin heat exchanger are installed outside the cold box support frame on sides A, A′; and in the second embodiment, the cold box panels 3 a , 3 a ′ facing the lateral plates of the plate-fin heat exchanger are installed inside the cold box support frame on the sides A, A′;
- step 2) of the foregoing installation method when the installation size is limited, the cold box panels 3 b , 3 b ′ facing the seals of the plate-fin heat exchanger may be installed in advance inside the cold box support frame on the sides B, B′; and if the installation size is not limited on-site, the cold box panels 3 b , 3 b ′ may be installed on-site inside the cold box support frame on the sides B, B′.
- equipment components or attachments such as pipes, cable shafts, valves or observation facilities and supports, may be installed during factory prefabrication.
- the present invention is applicable not only to rectangular parallelepiped cold boxes but also to cylindrical cold boxes.
- the present invention is also not limited to be applicable to plate-fin heat exchangers, but to all cases where leakage can be judged by means of the surface of the cold box, or where the cold box support frame needs to be protected.
- “Comprising” in a claim is an open transitional term which means the subsequently identified claim elements are a nonexclusive listing (i.e., anything else may be additionally included and remain within the scope of “comprising”). “Comprising” as used herein may be replaced by the more limited transitional terms “consisting essentially of” and “consisting of” unless otherwise indicated herein.
- Providing in a claim is defined to mean furnishing, supplying, making available, or preparing something. The step may be performed by any actor in the absence of express language in the claim to the contrary.
- Optional or optionally means that the subsequently described event or circumstances may or may not occur.
- the description includes instances where the event or circumstance occurs and instances where it does not occur.
- Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range.
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
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Abstract
Description
- This application is a § 371 of International PCT Application PCT/CN2017/082891, filed May 3, 2017, which is herein incorporated by reference in its entirety.
- The present invention relates to a cold box structure for a plate-fin heat exchanger and an installation method therefor, which are particularly suitable for a high-pressure aluminum plate-fin heat exchanger.
- The plate-fin heat exchanger has the characteristics of compact structure, light weight, high heat transfer efficiency, etc., and so is widely used in industrial sectors such as refrigeration, petrochemical, air separation, aerospace, power machinery and superconducting, and is generally recognized as one of the new efficient heat exchangers. Due to the low-temperature ductility and good tensile properties of aluminum alloy, plate-fin heat exchangers made of aluminum alloy are particularly suitable for low-temperature and ultra-low-temperature applications, and are also widely used in air separation processes in modern industries. At present, almost all the heat exchangers of air separation apparatuses use plate-fin heat exchangers. Due to operating at a temperature below −150° C., the air separation apparatus needs to be placed inside a cold box, and the cold box is filled with perlite sand to provide heat insulation.
- Generally, the cold box is in the shape of a rectangular hexahedron, comprising a base, a cold box support frame, four cold box panels and a cold box top plate. In the prior art, the cold box panels are welded to the outer side the cold box support frame. The cold box can be made of carbon steel or stainless steel, but due to the high price of stainless steel, carbon steel is usually used in practice. However, the carbon steel material is prone to brittle fracture at low temperatures. In the process of air separation, if leakage occurs at a plate-fin heat exchanger and low-temperature steam is ejected, the perlite sand inside the cold box becomes damp and hardened, and the cold box panels or the cold box support frame of carbon steel is easily damaged. Failure to timely discover leakage may result in other serious consequences.
- In traditional cold box structures, the cold box panels are placed outside the cold box support frame structure. In the process of air separation, cryogenic steam is ejected if leakage occurs at the plate-fin heat exchanger. If the leaked steam is directly ejected to the cold box support frame, since the cold box panels are located outside the cold box support frame and shield the cold box support frame, the damage caused by the leakage is not easily discovered in a timely manner, which may result in the failure to timely discover leakage in the plate-fin heat exchanger. This is not conducive to the safe operation of air separation systems, resulting in degraded quality of air separation products, which also may cause serious safety accidents; in addition, the repair work for the damaged cold box support frame is huge and the cost is high.
- Certain embodiments of the present invention provide a cold box structure with cold box panels partly built-in, which is applicable to a plate-fin heat exchanger, and in particular to a high-pressure aluminum plate-fin heat exchanger for use in an air separation process. The cold box of a carbon steel material in certain embodiments of the present invention is especially applicable to brazed aluminum plate-fin heat exchangers with the working pressure higher than 20 bar. Since leakage easily occurs on the sides of the high-pressure plate-fin heat exchanger where seals are located, and the temperature at the cold end of the heat exchanger is −196° C., cryogenic steam ejected due to leakage seriously damages the carbon steel structure, and brittle fracture, etc. may occur. In certain embodiments of the present invention, cold box panels facing sides of the plate-fin heat exchanger where the seals are located are placed inside the cold box support frame, so that the leakage can be timely discovered from the frost and icing conditions of the cold box panels upon occurring, which has the function of protecting the cold box support frame.
- The technical solution adopted by at least one embodiment of the present invention to solve the above technical problems is:
- a cold box structure comprising a base, a cold box support frame, four cold box panels and a cold box top plate, a plate-fin heat exchanger being fixed inside the cold box, wherein the cold box panels facing sides of the plate-fin heat exchanger where seals are located are placed inside the cold box support frame, and perlite sand is filled between the cold box and the plate-fin heat exchanger.
- In the present invention, the cold box support frame, the cold box panels, and the cold box top plate may be made of carbon steel or stainless steel.
- In another embodiment of the present invention, the cold box panels facing sides of the plate-fin heat exchanger where lateral plates are located are placed outside the cold box support frame, and may also be placed inside the cold box support frame.
- An installation method for the cold box structure can include the steps of:
- 1) affixing a cold box base, installing a cold box support frame, and installing a plate-fin heat exchanger inside the cold box support frame;
- 2) installing four cold box panels, wherein the cold box panels facing seals of the plate-fin heat exchanger are installed inside the cold box support frame, and the cold box panels facing lateral plates of the plate-fin heat exchanger are installed inside or outside the cold box support frame;
- 3) installing a cold box top plate at the top of the cold box support frame; and
- 4) welding the parts of the cold box in a sealed manner, filling the cold box with perlite sand, and, if necessary, charging nitrogen.
- In step 2) of the installation method, the cold box panels facing the seals of the plate-fin heat exchanger are installed in advance inside the cold box support frame, or are installed on-site inside the cold box support frame, depending on the on-site installation size.
- The positive effects produced by the technical solution of the present invention are as follows:
- 1) The cold box support frame is protected. When leakage occurs at the plate-fin heat exchanger, the leaked steam is prevented from being directly ejected to the cold box support frame, thereby protecting the cold box support frame from being damaged.
- 2) The leakage situation is timely discovered. The cold box panels facing the sides of the plate-fin heat exchanger where leakage easily occurs, that is, the sides where the seals are located, are placed inside the cold box support frame. When leakage occurs at the plate-fin heat exchanger, cryogenic steam is directly ejected to the inside cold box panels. Since the cold box panels are thin, air is condensed due to cooling, and frozen or frost conditions of the cold box panels can also be seen from outside of the cold box, so as to timely discover the leakage for maintenance. If the cold box panels are placed outside the cold box support frame, when the ejected cryogenic steam is exactly on the inside cold box support frame, the heat transfer is slower due to the thicker support frame, and the air is not easily condensed; in addition, due to the shielding of the outside cold box panels, it is difficult to discover the leakage situation of the plate-fin heat exchanger.
- Further features, advantages and possible applications of the invention are apparent from the following description of working and numerical examples and from the drawings. All described and/or depicted features on their own or in any desired combination form the subject matter of the invention, irrespective of the way in which they are combined in the claims the way in which said claims refer back to one another.
-
FIG. 1 is a schematic view of a plate-fin heat exchanger; -
FIG. 2 is a schematic structural view of a cold box support frame; -
FIG. 3 is a schematic view of the appearance of a first embodiment of the present invention; and -
FIG. 4 is a schematic view of the appearance of a second embodiment of the present invention. - The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
-
FIG. 1 is a schematic view of a plate-fin heat exchanger, wherein the sides on which seals of the heat exchanger are located are faces b, b′, and the sides on which lateral plates are located are faces a, a′. A plate heat exchanger (in particular a brazed aluminum plate heat exchanger) has a heat exchange portion inside which a plurality of heat exchange passages are disposed. The heat exchange passages are formed by alternately stacking partition plates and profiled plates (for example, ribbed plates or corrugated plates, finned plates) or distribution devices, and the heat exchange portion is formed by heating and brazing the stack in a suitable brazing furnace. Under high pressure, leakage easily occurs at the brazed joint, that is, leakage easily occurs at the faces b, b′ on which the seals of the plate-fin heat exchanger are located. -
FIG. 2 shows a schematic view of a coldbox support frame 2, the four sides of which are A, A′, B, B′, respectively. The oblique line areas in the figure represent the interior of the cold box support frame on the side A′ and the interior of the cold box support frame on the side B′, respectively, and 1 represents a base. The sides B, B′ of the cold box frame are opposite the sides of the plate-fin heat exchanger where seals are located, and sides A, A′ are opposite the sides of the plate-fin heat exchanger where cover plates are located (the plate-fin heat exchanger is not shown in the figure). In the process of installing the cold box panels, thecold box panels cold box panels -
FIG. 3 is a first embodiment of the present invention, comprising a base 1, a coldbox support frame 2, a cold box top plate 4, and fourcold box panels cold box panel 3 a and thecold box panel 3 b (3 a′, 3 b′ are not visible in the figure). Thecold box panels box support frame 2, and thecold box panels box support frame 2. - Faces a and a′ of the plate-fin heat exchanger are symmetrical faces of the plate-fin heat exchanger, and faces b and b′ are further symmetrical faces of the plate-fin heat exchanger. The sides A and A′ of the cold box frame are symmetrical to each other, and the sides B and B′ are symmetrical to each other. The
cold box panels - In the present invention, the interior of the cold box support frame refers to the side of the cold box support frame facing the heat exchanger; and the exterior of the cold box support frame refers to the side of the cold box support frame facing the outside air.
- In the present invention, the
cold box panels box support frame 2 refers to a structure that supports the cold box panels to fix the cold box panels. - In the first embodiment, the
cold box panels cold box panels cold box panels - In the first embodiment, the
cold box panels cold box panels -
FIG. 4 is a second embodiment of the present invention, comprising a base 1, a coldbox support frame 2, a cold box top plate 4, and fourcold box panels cold box panel 3 a and thecold box panel 3 b (3 a′, 3 b′ are not visible in the figure). The fourcold box panels box support frame 2. - In the second embodiment, the cold box structure comprises the
cold box panels cold box panels cold box panels - In the first and second embodiments, the cold box support frame and the cold box panels are made of carbon steel or stainless steel.
- An installation method of the cold box structure of the first and second embodiments is as follows:
- 1) fixing a cold box base 1, installing a cold
box support frame 2, and installing a plate-fin heat exchanger inside the coldbox support frame 2; - 2) installing four
cold box panels cold box panels cold box panels cold box panels - 3) installing a cold box top plate 4 at the top of the cold
box support frame 2; and - 4) welding joints in a sealed manner, filling the cold box with perlite sand, and, if necessary, charging nitrogen.
- In step 2) of the foregoing installation method, when the installation size is limited, the
cold box panels cold box panels - Of course, some equipment components or attachments, such as pipes, cable shafts, valves or observation facilities and supports, may be installed during factory prefabrication.
- The present invention is applicable not only to rectangular parallelepiped cold boxes but also to cylindrical cold boxes. The present invention is also not limited to be applicable to plate-fin heat exchangers, but to all cases where leakage can be judged by means of the surface of the cold box, or where the cold box support frame needs to be protected.
- The above embodiments are only preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the embodiments. All the technical solutions under the inventive concept are within the scope of protection of the present invention. It should be noted that, to those of ordinary skill in the art, several modifications and variations without departing from the principles of the present invention should be considered to be within the scope of protection of the present invention.
- While the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations as fall within the spirit and broad scope of the appended claims. The present invention may suitably comprise, consist or consist essentially of the elements disclosed and may be practiced in the absence of an element not disclosed. Furthermore, if there is language referring to order, such as first and second, it should be understood in an exemplary sense and not in a limiting sense. For example, it can be recognized by those skilled in the art that certain steps can be combined into a single step.
- The singular forms “a”, “an” and “the” include plural referents, unless the context clearly dictates otherwise.
- “Comprising” in a claim is an open transitional term which means the subsequently identified claim elements are a nonexclusive listing (i.e., anything else may be additionally included and remain within the scope of “comprising”). “Comprising” as used herein may be replaced by the more limited transitional terms “consisting essentially of” and “consisting of” unless otherwise indicated herein.
- “Providing” in a claim is defined to mean furnishing, supplying, making available, or preparing something. The step may be performed by any actor in the absence of express language in the claim to the contrary.
- Optional or optionally means that the subsequently described event or circumstances may or may not occur. The description includes instances where the event or circumstance occurs and instances where it does not occur.
- Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range.
- All references identified herein are each hereby incorporated by reference into this application in their entireties, as well as for the specific information for which each is cited.
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2017/082891 WO2018201339A1 (en) | 2017-05-03 | 2017-05-03 | Cold box structure with cold box panels partly built-in and installation method therefor |
Publications (1)
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US20200056840A1 true US20200056840A1 (en) | 2020-02-20 |
Family
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Family Applications (1)
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US16/610,205 Abandoned US20200056840A1 (en) | 2017-05-03 | 2017-05-03 | Cold box structure with cold box panels partly built-in and installation method therefor |
Country Status (4)
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US (1) | US20200056840A1 (en) |
EP (1) | EP3620738A4 (en) |
CN (1) | CN110612422A (en) |
WO (1) | WO2018201339A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3670773A1 (en) * | 2018-12-17 | 2020-06-24 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cold box steel structure and method for prefabricating and transporting same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115371358A (en) * | 2022-07-21 | 2022-11-22 | 杭州福斯达深冷装备股份有限公司 | Air separation plant and cold box subassembly thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2799822B1 (en) * | 1999-10-18 | 2002-03-29 | Air Liquide | COLD BOX, CORRESPONDING AIR DISTILLATION SYSTEM AND CONSTRUCTION METHOD |
DE10229663A1 (en) * | 2002-07-02 | 2004-01-22 | Linde Ag | Coldboxblechmantel |
WO2008014899A1 (en) * | 2006-08-04 | 2008-02-07 | Linde Aktiengesellschaft | Method of producing a cold box, cold box and cold box panel |
US9051749B2 (en) * | 2008-12-10 | 2015-06-09 | Air Liquide Global E&C Solutions US, Inc. | Hybrid method of erecting a cold box using prefabricated and field erected components |
US8727159B2 (en) * | 2011-04-12 | 2014-05-20 | Conocophillips Company | Cold box design providing secondary containment |
CN202133229U (en) * | 2011-06-07 | 2012-02-01 | 上海启元气体发展有限公司 | Cooling box of large-sized air separating equipment |
FR2995673B1 (en) * | 2012-09-19 | 2018-08-10 | L'air Liquide,Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | HEAT EXCHANGER AND EXCHANGER ASSEMBLY FOR AIR DISTILLATION COMPRISING SUCH HEAT EXCHANGERS |
DE102013012606B4 (en) * | 2013-02-19 | 2015-08-06 | CRYOTEC Anlagenbau GmbH | Modular process plant, in particular air separation plant with a variety of plant components |
FR3017443B1 (en) * | 2014-02-11 | 2016-09-02 | Air Liquide | ISOLATED SPEAKER AND METHOD OF SCANNING SUCH AN ENCLOSURE |
-
2017
- 2017-05-03 US US16/610,205 patent/US20200056840A1/en not_active Abandoned
- 2017-05-03 EP EP17908663.2A patent/EP3620738A4/en not_active Withdrawn
- 2017-05-03 CN CN201780090098.6A patent/CN110612422A/en active Pending
- 2017-05-03 WO PCT/CN2017/082891 patent/WO2018201339A1/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3670773A1 (en) * | 2018-12-17 | 2020-06-24 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cold box steel structure and method for prefabricating and transporting same |
Also Published As
Publication number | Publication date |
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WO2018201339A1 (en) | 2018-11-08 |
EP3620738A4 (en) | 2020-11-25 |
CN110612422A (en) | 2019-12-24 |
EP3620738A1 (en) | 2020-03-11 |
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