KR102252170B1 - Plate fin heat exchanger having replaceable catalysts for liquefaction of hydrogen - Google Patents

Abstract

The present invention relates to a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst. In accordance with the present invention, a first plate fin accommodation space and a catalyst accommodation space are separately provided in a first channel formation space between adjacent parting sheets, and a first plate fin is provided in the first plate fin accommodation space for brazing with an adjacent parting sheet. Therefore, a heat exchanger core is maintained in a sturdy and stable structure even though a catalyst, inserted into the catalyst accommodation space, is not bonded to the adjacent parting sheet. In addition, since a flange for coupling is provided at each of a part where the catalyst of the heat exchanger core is inserted and a detachable header, the heat exchanger core and the detachable header are coupled to each other to be able to be detached. Thus, the detachable header can be easily separated from the heat exchanger core to easily replace the catalyst.

Description

PLATE FIN HEAT EXCHANGER HAVING REPLACEABLE CATALYSTS FOR LIQUEFACTION OF HYDROGEN}

The present invention relates to a plate fin heat exchanger, and more particularly, to a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body used in a process for converting hydrogen gas into liquefied hydrogen.

Hydrogen has an energy density of three times that of gasoline per unit mass, but its energy density per unit volume is only 1/4 of that of gasoline. In other words, hydrogen is a material having a very low energy density when in a gaseous state and a very high energy density when liquefied. Therefore, in order to store and transport hydrogen, a process of converting hydrogen gas into liquefied hydrogen is essential.

Hydrogen has a critical temperature of 33K and a triple point temperature of 13K, and hydrogen at room temperature and pressure starts to liquefy from 20K and becomes a solid state when it reaches 14K. That is, a large amount of cold heat is required to liquefy hydrogen gas at room temperature and pressure.

In general, in order to lower the temperature of hydrogen from 300K to 20K, it is necessary to take 5153kJ of energy per 1Kg of hydrogen. The energy of 5153kJ is 4000kJ of sensible heat to lower the temperature of hydrogen from 300K to 20K, 450kJ of phase change heat to phase change hydrogen from 20K, and hydrogen from 20K. -Consists of 703kJ of thermal energy for Ortho-Para Hydrogen conversion.

Hydrogen molecules are classified into Ortho Hydrogen and Para Hydrogen according to the direction of the nuclear spins of the two hydrogen atoms. Ortho-hydrogen is hydrogen in a state in which the nucleus of a hydrogen atom is rotating in the same direction, and para-hydrogen is hydrogen in a state in which the nucleus of a hydrogen atom is rotating in the opposite direction.

Para-hydrogen is hydrogen with lower energy than ortho-hydrogen, and at room temperature, ortho-hydrogen and para-hydrogen exist in a ratio of 75 to 25. However, when the temperature drops below 20K, most of orthohydrogen is converted to parahydrogen, and the ratio of orthohydrogen and parahydrogen is converted to a ratio of 0.2 to 99.8.

The process of converting ortho-hydrogen to para-hydrogen is an exothermic process that dissipates heat to the outside, and the heat generated during the ortho-para conversion evaporates the liquefied hydrogen again. Therefore, in order to liquefy the hydrogen gas, it is necessary to supply cold heat to lower the temperature of the hydrogen gas and control the para conversion rate using Para conversion catalysts.

Currently, various para-conversion catalysts have been developed and used. Representative para-conversion catalysts include CrO3/SiO2-gel, chromic anhydride, nickel silica gel, Fe-Ni alloys, activated charcoal, Fe(OH)3, and Fe2O3.

Such a para-conversion catalyst is produced by mixing, stirring, heating, drying, and sintering a precursor while precisely changing the temperature. Therefore, if high-temperature heat is applied to the finished catalyst, the catalyst may be deteriorated, and therefore considerable care is required during handling.

Meanwhile, as an apparatus for converting a large amount of hydrogen gas into liquefied hydrogen, a plate fin heat exchanger (PFHE) is generally used. The core of the plate fin heat exchanger is manufactured by brazing a parting sheet, a plate fin, and a side bar.

More specifically, plate fins for forming flow channels of hydrogen and heat exchange medium are provided between the upper and lower parting sheets, and side bars are inserted at the edges between the upper and lower parting sheets.

Meanwhile, in the prior art, a separate catalytic reactor including a plate fin heat exchanger for hydrogen liquefaction and para conversion catalysts for controlling the para conversion rate of hydrogen during the ortho-para conversion is provided.

However, if a separate catalytic reactor is used, there is a problem that the overall hydrogen liquefaction system is enlarged.

In order to solve such a problem, the present inventors have examined a method of placing the para-conversion catalyst inside the core of the heat exchanger, but the fact that the para-conversion catalyst is deteriorated due to brazing heat in the process of manufacturing the core of the heat exchanger. Was found.

In addition, unlike parting sheets, side bars, and plate fins of a heat exchanger made of aluminum, the para-conversion catalyst is not well bonded by brazing due to the nature of the material. That is, the part of the core of the heat exchanger into which the para-conversion catalyst is inserted becomes structurally very fragile.

In addition, in the conventional plate fin heat exchanger, since the header is coupled to the core of the heat exchanger by welding, if a problem occurs inside the core, the header must be cut with a cutter to repair the inside of the core.

Republic of Korea Patent Registration No. 10-1153055 "Natural gas liquefaction system using plate fin heat exchanger" (Registered on March 29, 201)

The present invention was conceived to solve the problems of the prior art as described above, and the components constituting the core of the heat exchanger are brazed and bonded to a plate fin heat exchanger. In this regard, a separate space for accommodating a catalyst body including a para-conversion catalyst is provided inside the heat exchanger core, and a structure to reinforce the space for accommodating the catalyst body is provided to heat exchange without the catalyst body being bonded to the parting sheet. It is intended to have a solid and stable structure of the core of the machine.

In addition, the header is detachably bonded to the part where the catalyst body of the heat exchanger core is inserted, so that when a problem occurs in the para-conversion catalyst, the header can be separated and the catalyst body can be easily replaced.

In order to solve the above problems, the present invention provides a plurality of parting sheets stacked vertically so that the first channel formation space and the second channel formation space are alternately formed in the vertical direction, and the first channel A first plate fin provided in the formation space, with both ends extending in the longitudinal direction of the parting sheet to form a plurality of hydrogen flow channels communicating with the outside, and a first plate fin provided in the second channel formation space, with both ends of the parting sheet extending in the longitudinal direction of the parting sheet. The second plate fins extending in the width direction of the parting sheet and forming a plurality of heat exchange medium flow channels in communication with the outside, and the edge of the parting sheet adjacent in the vertical direction are provided between the parting sheets adjacent in the vertical direction. In a plate fin heat exchanger comprising a heat exchanger core manufactured by brazing and bonding side bars to each other: the first channel forming space is located at one side in the longitudinal direction of the parting sheet. It consists of a first plate pin accommodation space and a catalyst body accommodation space located on the other side in the longitudinal direction; The first plate pin is accommodated in the first plate pin accommodating space; A catalyst body including para conversion catalysts is interchangeably inserted into the catalyst body receiving space; A first coupling flange is formed at the other end of the heat exchanger core in the longitudinal direction; A detachable header having a second coupling flange is detachably coupled to the first coupling flange; A fixed header is coupled to one end of the heat exchanger core in the longitudinal direction by welding; Hydrogen flowing into the removable header passes through the catalyst body and the first plate pin and flows out to the fixed header; In the catalyst body accommodation space, a plurality of support bars extending in the longitudinal direction of the parting sheet and spaced apart in the width direction of the parting sheet are provided and brazed and bonded to the neighboring parting sheets in the vertical direction; The catalyst body is inserted between the support bars adjacent to the catalyst body accommodation space; It features.

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In the above, it is preferable that the catalyst body is a porous metal foam coated with the para-conversion catalyst.

In the above, it is preferable that the catalyst body is made of the para-conversion catalyst in the form of a porous metal foam.

In the above, it is preferable that the catalyst body includes a plurality of catalyst balls made of the para-conversion catalyst in a ball shape in a mesh pack.

In the above, it is preferable that the para-conversion catalyst is coated on a catalyst plate fin that forms a plurality of catalytic reaction channels through which the catalyst body is inserted into the catalyst body accommodation space to flow hydrogen.

As described above, the plate fin heat exchanger for the hydrogen liquefaction process capable of replacing the catalyst body according to the present invention includes a first plate fin accommodation space and a catalyst body accommodation space in the first channel formation space between neighboring parting sheets. It is provided, and a first plate fin is provided in the first plate fin accommodating space to be brazed to neighboring parting sheets, so that the core of the heat exchanger has a solid and stable structure.

In addition, a coupling flange is provided on the heat exchanger core and the detachable header, respectively, and the heat exchanger core and the detachable header are detachably coupled, so that the detachable header can be separated from the heat exchanger core to easily replace the catalyst body accommodated in the catalyst body accommodation space. I can.

1 is a perspective view of a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body according to an embodiment of the present invention,
FIG. 2 is a view showing a heat exchanger core and a header of the plate fin heat exchanger for a hydrogen liquefaction process in which the catalyst body of FIG. 1 can be replaced;
3 is a view showing a state in which a part of the heat exchanger core is removed so that the first channel formation space of the heat exchanger core of FIG. 1 is visible;
4 is a view showing a state in which a part of the heat exchanger core is removed so that the second channel formation space of the heat exchanger core of FIG. 1 is visible;
5 is a view showing a main part of the heat exchanger core of FIG. 2 separated;
6 is a longitudinal cross-sectional view of a portion of the heat exchanger core of FIG. 2 in which the catalyst body is accommodated;
7 is a longitudinal cross-sectional view of a portion of the heat exchanger core of FIG. 2 in which the first plate pin is accommodated;
8 is a view showing a state of separating the catalyst body in the plate fin heat exchanger for a hydrogen liquefaction process capable of replacing the catalyst body according to an embodiment of the present invention;
9 and 10 are views showing another embodiment of the catalyst body of FIG. 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification. When a part of the specification "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

1 is a perspective view of a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body according to an embodiment of the present invention, and FIG. 2 is a heat exchanger of a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body of FIG. 1 It is a view showing the core and the header separated, and FIG. 3 is a view showing a state in which a part of the heat exchanger core is removed so that the first channel formation space of the heat exchanger core of FIG. 1 is visible, and FIG. 4 is a heat exchanger of FIG. It is a diagram showing a state in which a part of the heat exchanger core is removed so that the second channel forming space of the core is removed, and FIG. 5 is a view showing the main part of the heat exchanger core of FIG. 2 separately, and FIG. 6 is A longitudinal cross-sectional view of a portion of a heat exchanger core receiving a catalyst body, FIG. 7 is a longitudinal cross-sectional view of a portion receiving a first plate pin of the heat exchanger core of FIG. 2, and FIG. 8 is a catalyst body according to an embodiment of the present invention. It is a view showing a state in which the catalyst body is separated in a plate fin heat exchanger for a hydrogen liquefaction process that can be replaced.

A plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body according to an embodiment of the present invention is for allowing hydrogen and a heat exchange medium to flow through respective flow channels to allow heat exchange between the two media.

As a heat exchange medium for liquefying hydrogen, liquefied natural gas (LNG), liquid nitrogen (LN2), helium (He), and the like may be used. A process for cooling hydrogen gas into liquefied hydrogen by using a heat exchange medium is widely known in the art, and thus a detailed description thereof will be omitted.

The plate fin heat exchanger for the hydrogen liquefaction process capable of replacing the catalyst body of this embodiment includes a parting sheet 100, an end plate 200, a first and a second plate fin 310, 320, and a side It comprises a bar (side bar, 410, 420), a support bar (support bar, 500), a catalyst body 600, and a header (header, 710, 720).

The parting sheet 100, the end plate 200, the first and second plate pins 310 and 320, the side bars 410 and 420, the support bar 500, and the catalyst body 600 are used to form a heat exchanger core (C). The header 700 is coupled to the heat exchanger core (C) to complete a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body.

The parting sheet 100 is for forming a first channel forming space and a second channel forming space alternately in the vertical direction by stacking a plurality of the parting sheets in the vertical direction.

The parting sheet 100 is a rectangular metal plate made of aluminum having high thermal conductivity. In this embodiment, five parting sheets 100 are provided to be stacked in the vertical direction. The first channel forming space and the second channel forming space are alternately formed in the vertical direction by the five parting sheets 100.

The first channel formation space is formed between the first parting sheet 100 and the second parting sheet 100, and between the third parting sheet 100 and the fourth parting sheet 100, respectively.

In addition, the second channel forming space is formed between the second parting sheet 100 and the third parting sheet 100 from above, and between the fourth parting sheet 100 and the fifth parting sheet 100.

End plates 200 are provided on the upper part of the parting sheet 100 located at the top and the lower part of the parting sheet 100 located at the lowermost end, respectively. The end plate 200 is for reinforcing the parting sheet 100 in the form of a thin metal plate. After the heat exchanger core C is completed, the headers 710 and 720 are coupled to the end plate 200.

A first plate fin 310 forming a hydrogen flow channel 311 is provided in the first channel forming space, and a second plate fin 320 forming a heat exchange medium flow channel 321 is provided in the second channel forming space. It is prepared.

Before describing the first and second plate pins 310 and 320 in detail, a first channel formation space in which the first plate pin 310 is provided will be described in detail.

The first channel formation space includes a first plate pin accommodation space 111 located on one side in the length direction of the parting sheet 100 and a catalyst body accommodation space 112 located on the other side in the length direction. The first plate pin receiving space 111 is a place where the first plate pin 310 is accommodated, and the catalyst body receiving space 112 is a place where the catalyst body 600 is accommodated.

In this way, the first channel formation space is separated into the first plate pin accommodation space 111 and the catalyst body accommodation space 112 by brazing and bonding the first plate pin 310 to the neighboring parting sheet 100. It is for inserting the catalyst body 600 to be replaceable by providing a separate space while being firmly fixed.

A plurality of support bars 500 are further provided in the catalyst body accommodation space 112 to support the parting sheets 100 adjacent in the vertical direction and reinforce the structure of the catalyst body accommodation space 112.

The support bar 600 has a height corresponding to the spaced apart intervals of the neighboring parting sheets 100 and extends in the longitudinal direction of the parting sheet 100. The plurality of support bars 600 are disposed to be spaced apart in the width direction of the parting sheet 100 in the catalyst body accommodation space 112.

The support bar 500 is brazed and bonded to the two adjacent parting sheets 100 in the vertical direction. The support bar 500 reinforces the catalyst body accommodation space 112 into which the catalyst body 600 is to be inserted so that the heat exchanger core C has a solid and stable structure.

6 shows a state in which the support bar 500 is brazed and bonded to the neighboring parting sheet 100. The shade 800 on the upper and lower portions of the support bar 500 is a filler metal that melts during brazing and bonds the two base materials (support bar and parting sheet) to each other.

In FIG. 6, the upper and lower portions of the support bar 500 are shown as being far away from the parting sheet 100, but this is exaggerated in order to clearly show the state of brazing bonding by the filler 800. In practice, the upper and lower portions of the support bar 500 are in contact with the parting sheet 100, and the filler 800 penetrates into the minute gaps in the contact area to form brazing bonding.

In FIG. 6, two parting sheets 100 adjacent in the vertical direction are supported in a state that is firmly fixed to the support bar 500, so that the catalyst body 600 is not bonded to the parting sheet 100. It can be seen that the insertion site of the has a sturdy structure.

A first plate pin 310 is provided in the first plate pin receiving space 111 of the first channel forming space. The first plate pin 310 is manufactured in a corrugated shape by bending a thin aluminum plate up and down.

The first plate pin 310 is provided in the first channel forming space, and both ends thereof extend in the longitudinal direction of the parting sheet 100 to form a plurality of hydrogen flow channels 311 communicating with the outside. The hydrogen flow channel 311 is a passage through which hydrogen can flow along a certain path.

The first plate pin 310 of this embodiment is a hydrogen flow channel 311 of a shape extending in a straight line along the longitudinal direction of the parting sheet 100 in the first plate pin receiving space 111 of the first channel forming space. To form.

As shown in FIG. 7, the upper and lower portions of the first plate pin 310 are brazed and bonded to the adjacent parting sheet 100. In FIG. 7, portions indicated by shades on the upper and lower portions of the first plate pin 310 are a filler 800 for brazing and bonding two adjacent base materials (the first plate pin and the parting sheet).

A second plate fin 320 is provided in the second channel formation space. The second plate pin 320 is manufactured in a corrugated shape by bending a thin aluminum plate up and down.

The second plate fins 320 are provided in the second channel forming space, and both ends thereof extend in the width direction of the parting sheet 100 to form a plurality of heat exchange medium flow channels 321 communicating with the outside. The heat exchange medium flow channel 321 is a passage through which the heat exchange medium can flow along a certain path.

The second plate fin 320 of this embodiment forms a heat exchange medium flow channel 321 extending in a'Z' shape in the second channel formation space. In the drawing, the second plate pin 320 is shown as being manufactured by bending one metal plate, but the second plate pin 320 is several pieces along the bent portion of the heat exchange medium flow channel 321 for convenience in manufacturing. It can be divided into and manufactured.

As shown in FIG. 7, the upper and lower portions of the second plate pins 320 are brazed and bonded to the upper and lower parting sheets 100 adjacent to each other. Like the first plate pin 310, the filler 800 is melted and bonded to the parting sheet 100 in the upper and lower portions of the second plate pin 320.

In FIG. 7, the bonding portions of the first and second plate pins 310 and 320 and the parting sheet 100 are shown as if they are far apart, but this is exaggerated in order to clearly show the brazing bonding state by the filler 800. will be. In reality, while the two base materials are in contact, the molten filler 800 penetrates into the fine gap between the base materials to form brazing bonding.

Side bars 410 and 420 for supporting the edges of the neighboring parting sheets 100 are provided between the parting sheets 100 adjacent in the vertical direction while maintaining the spacing between the neighboring parting sheets 100. The side bars 410 and 420 are metal bars made of aluminum, and the side bars 410 and 420 of the present embodiment are divided into two types.

One is a first side bar 410 provided between the two parting sheets 100 forming a first channel forming space. The first side bar 410 has a straight shape extending in the length direction of the parting sheet 100, and is brazed to each end of the adjacent parting sheet 100 in the width direction.

The other is a second side bar 420 provided between the two parting sheets 100 forming a second channel forming space. The second side bar 420 has a shape in which one side extends in the width direction of the parting sheet 100 and the other side extends in the length direction of the parting sheet 100 in a'b' shape. The second side bar 420 is brazed and bonded to the neighboring parting sheet 100 so as to surround the rest of the heat exchange medium flow channel 321 through which the heat exchange medium enters and exits.

Except for the catalyst body 600, the heat exchanger cores C are all manufactured by brazing and bonding in a vacuum state. The parting sheet 100 coated with the filler 800, the first and second plate pins 310 and 320, the side bars 410 and 420, and the support bar 500 are laminated in the form of a heat exchanger core (C). Put it in a brazing furnace and heat it in a vacuum so that the brazing joint is made to the contacted part.

The catalyst body 600 is inserted into the catalyst body accommodation space 112 after the heat exchanger core (C) excluding the catalyst body 600 is manufactured by brazing and bonding. Since the catalyst body 600 is inserted after all the brazing bonding of the heat exchanger core C is completed, the para-conversion catalyst is not deteriorated by the brazing heat.

The catalyst body 600 of this embodiment is a porous metal foam coated with para conversion catalysts for controlling the para conversion rate of hydrogen, and is provided in the catalyst body accommodation space 112. It is manufactured in the form of a rectangular parallelepiped block so that it can be inserted interchangeably between the plurality of support bars 500.

Depending on the embodiment, the catalyst body 600 may not be manufactured by coating the para-conversion catalyst on a metal foam, but may be manufactured by molding the para-conversion catalyst itself into a porous metal foam.

As the para-conversion catalyst, CrO3/SiO2-gel, chromic anhydride, nickel silica gel, Fe-Ni alloys, activated charcoal, Fe(OH)3, Fe2O3, etc. may be used. In this example, Fe(OH)3 is used as a para-conversion catalyst coated on a metal foam.

Since the catalyst body 600 is manufactured by coating a para-conversion catalyst on a porous metal foam or molding the para-conversion catalyst itself in the form of a metal foam, hydrogen passes through the pores of the catalyst body 600 to accommodate the catalyst body. It may flow from 112 to the first plate pin accommodation space 111.

Hydrogen passing through the pores of the catalyst body 600 flows into the hydrogen flow channel 311 of the first plate pin 310 provided in the first plate pin receiving space 111 and flows along the hydrogen flow channel 311 .

Headers 710 and 720 are coupled to both ends in the length direction and both ends in the width direction of the heat exchanger core C into which the catalyst body 100 is inserted. The header is for gathering the ends of the plurality of hydrogen flow channels 311 or the ends of the plurality of heat exchange medium flow channels 321 into one, and nozzles 711 and 721 for entering and exiting hydrogen or heat exchange medium are formed in the headers 710 and 720, respectively. Has been.

In this embodiment, the two types of headers 710 and 720 are combined in different ways so that the catalyst body 600 can be easily separated from the heat exchanger core C and replaced.

One of the two types of headers 710 and 720 is a removable header 710, and the other is a fixed header 720. The removable header 710 is detachably coupled to the heat exchanger core (C) in a flange manner, and the fixed header 720 is coupled to the heat exchanger core (C) by welding.

The removable header 710 is detachably coupled to a portion of the heat exchanger core (C) into which the catalyst body 700 is inserted. To this end, a first coupling flange 900 is formed at a portion of the heat exchanger core C into which the catalyst body 700 is inserted. More specifically, a first coupling flange in the form of a rectangular ring surrounding the end plate 200, the parting sheet 100, and the first and second side bars 410 and 420 at the other end of the heat exchanger core (C) in the longitudinal direction ( 900) is formed.

The detachable header 710 is formed with a second coupling flange 712 for flange coupling to the first coupling flange 900. The second coupling flange 712 is formed at the end of the detachable header 710 in the same shape as the first coupling flange 900.

The second coupling flange 712 of the removable header 710 is coupled to the first coupling flange 900 of the heat exchanger core C using a bolt 910 and a nut 920. When the bolt 910 and the nut 920 that couple the first and second coupling flanges 712 and 900 are disassembled, only the removable header 710 can be separated from the heat exchanger core C as shown in FIG. 8.

When the detachable header 710 is separated, the catalyst body 600 inserted in the catalyst body accommodation space 112 of the heat exchanger core (C) can be easily pulled out and replaced.

The fixed header 720 is coupled to one end in the length direction and both ends in the width direction of the heat exchanger core (C). The fixed header 720 is fixedly coupled by welding to the heat exchanger core (C). More specifically, the end plate 200 located at the end of the heat exchanger core C and the side bars 410 and 420 are welded and coupled. The coupling position and coupling form of the fixed header 720 can be seen in FIGS. 1 and 8.
Accordingly, hydrogen introduced into the removable header 710 passes through the catalyst body 600 and the first plate pin 310 and flows out to the fixed header 720.

9 and 10 are views showing another embodiment of the catalyst body of FIG. 5.

The shape of the catalyst body 600 described above is only an example, and the catalyst body may be manufactured in various forms according to embodiments.

The catalyst body 600a shown in FIG. 9 is a mesh pack 610a in which a plurality of catalyst balls 620a manufactured in a ball shape of a para-conversion catalyst are inserted. The gap between the catalyst balls 620a serves as a void through which hydrogen flows.

The catalyst body 600b shown in FIG. 10 is coated with a para-conversion catalyst on a plate pin for a catalyst bent in the same shape as the first plate pin 310. The catalyst body 600b is inserted into the catalyst body accommodation space 112 like the first plate pin 310 to form a plurality of catalytic reaction channels 610b through which hydrogen flows.

The catalyst body 600b of FIG. 10 is manufactured in a similar shape to the first plate pin 310, but unlike the first plate pin 310, it is not bonded to the neighboring parting sheet 100, and the neighboring support bar 500 ) Is simply inserted between.

As described above, the catalyst bodies 600,600a, 600b can be manufactured in various forms, in which a separate space for inserting the catalyst bodies 600,600a, 600b is provided in the heat exchanger core (C), and a support bar ( This is because the catalyst body accommodation space 112 is maintained in a solid and stable structure by 500).

In the heat exchanger core (C) of the plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body according to an embodiment of the present invention, a first plate fin accommodation space 111 in which the first plate fin 310 is inserted The catalyst body receiving space 112 into which the and catalyst bodies 600, 600a and 600b are inserted is provided separately.

The first plate pin 310 is brazed and bonded to the neighboring parting sheet 100 while being inserted into the first plate pin accommodating space 111. The first plate pin 310 is firmly bonded to the neighboring parting sheet 100 so that the heat exchanger core C is maintained in a strong and stable structure.

A plurality of support bars 500 are provided in the catalyst body accommodation space 112 separately provided in the heat exchanger core C, and the support bars 500 are brazed and bonded to the upper and lower parting sheets 100 adjacent to each other.

Therefore, even if the neighboring parting sheet 100 is not supported by the catalyst bodies 600,600a, 600b inserted in the catalyst body receiving space 112, the part forming the catalyst body receiving space 112 is very strong and stable. Is maintained.

The catalyst bodies 600, 600a, 600b are interchangeably inserted between the support bars 500 that are firmly bonded. In addition, a detachable header 710 is detachably coupled to the other end of the heat exchanger core (C) in the longitudinal direction in which the catalyst body accommodation space 112 is formed.

Therefore, when a problem occurs in the catalyst body (600,600a, 600b) inserted in the catalyst body accommodation space 112, the detachable header 710 is separated from the heat exchanger core (C) to separate the catalyst bodies (600,600a, 600b). Can be easily replaced.

The foregoing description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily transformed into other specific forms without changing the technical spirit or essential features of the present invention. .

Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

C: heat exchanger core
100: parting sheet 111: first plate pin accommodation space
112: catalyst body accommodation space
200: end plate
310: first plate pin 311: hydrogen flow channel
320: second plate pin 321: heat exchange medium flow channel
410: first side bar 420: second side bar
500: support bar 600,600a,600b: catalyst body
610a: mesh pack 620a: catalyst ball
610b: catalytic reaction channel
710: removable header 711: nozzle
712: second coupling flange
720: fixed header 721: nozzle
800: filler
900: first coupling flange

Claims (6)

A plurality of parting sheets are provided to be stacked in the vertical direction so that the first channel forming space and the second channel forming space are alternately formed in the vertical direction, and both ends of the parting sheet are provided in the first channel forming space. A first plate fin extending in the longitudinal direction to form a plurality of hydrogen flow channels communicating with the outside, and provided in the second channel forming space, and both ends extend in the width direction of the parting sheet to communicate with the outside. A second plate fin that forms a plurality of heat exchange medium flow channels and a side bar provided between the parting sheets adjacent in the vertical direction and supporting the edges of the parting sheets adjacent in the vertical direction are brazed to each other. In the plate fin heat exchanger comprising a heat exchanger core manufactured by (brazing) bonding:
The first channel formation space is composed of a first plate pin accommodation space located on one side in the length direction of the parting sheet and a catalyst body accommodation space located on the other side in the length direction;
The first plate pin is accommodated in the first plate pin accommodating space;
A catalyst body including para conversion catalysts is interchangeably inserted into the catalyst body receiving space;
A first coupling flange is formed at the other end of the heat exchanger core in the longitudinal direction;
A detachable header having a second coupling flange is detachably coupled to the first coupling flange;
A fixed header is coupled to one end of the heat exchanger core in the longitudinal direction by welding;
Hydrogen flowing into the removable header passes through the catalyst body and the first plate pin and flows out to the fixed header;
In the catalyst body accommodation space, a plurality of support bars extending in the longitudinal direction of the parting sheet and spaced apart in the width direction of the parting sheet are provided to be brazed and bonded to the adjacent parting sheets in the vertical direction;
The catalyst body is inserted between the support bars adjacent to the catalyst body accommodation space;
Plate fin heat exchanger for hydrogen liquefaction process capable of replacing a catalyst body, characterized in that. delete The method of claim 1,
The catalyst body is a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body, characterized in that the catalyst body is a porous metal foam coated with the para-conversion catalyst.
The method of claim 1,
The catalyst body is a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing the catalyst body, characterized in that the para-conversion catalyst is manufactured in the form of a porous metal foam.
The method of claim 1,
The catalyst body is a plate fin heat exchanger for a hydrogen liquefaction process capable of replacing a catalyst body, characterized in that a plurality of catalyst balls prepared in a ball shape of the para-conversion catalyst are inserted into a mesh pack.
The method of claim 1,
The catalyst body is inserted into the catalyst body accommodation space to form a plurality of catalytic reaction channels through which hydrogen flows, and the para-conversion catalyst is coated on the catalyst plate pin. Plate fin heat exchanger.

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