CN112683088B - A heat exchange device resistant to high temperature, high pressure and hydrogen corrosion - Google Patents
A heat exchange device resistant to high temperature, high pressure and hydrogen corrosion Download PDFInfo
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- CN112683088B CN112683088B CN202110029189.7A CN202110029189A CN112683088B CN 112683088 B CN112683088 B CN 112683088B CN 202110029189 A CN202110029189 A CN 202110029189A CN 112683088 B CN112683088 B CN 112683088B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 14
- 230000007797 corrosion Effects 0.000 title claims abstract description 14
- 239000001257 hydrogen Substances 0.000 title claims abstract description 14
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 88
- 238000009413 insulation Methods 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 39
- 230000015572 biosynthetic process Effects 0.000 claims description 30
- 238000003786 synthesis reaction Methods 0.000 claims description 30
- 238000012546 transfer Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 22
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 229910001055 inconels 600 Inorganic materials 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000012774 insulation material Substances 0.000 abstract description 3
- 239000011324 bead Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明公开了一种抗高温、高压、及氢腐蚀的热交换装置，其包括一外壳和设置在该外壳内的管板，管板将外壳的内腔分为换热腔和冷媒腔；冷媒腔被分割分进液腔和出液腔；在换热腔内安装有隔热筒和高温内联箱，U形换热管的两端经管板连通进液腔和出液腔；隔热筒与管板之间具有连通隔热筒内外的连通部；高温内联箱与隔热筒相连通；在外壳上设置有气体进口管和气体出口管，该气体进口管正对高温内联箱、且连通该高温内联箱，该气体出口管正对连通部；在高温内联箱与外壳之间填充有第一保温材料，该隔热筒与筒体之间的环隙形成为死气区，该死气区经连通部连通该隔热筒的内腔。利用本申请，能够较好的降低设备的制作费用。
The invention discloses a heat exchange device resistant to high temperature, high pressure and hydrogen corrosion, which comprises a shell and a tube sheet arranged in the shell, the tube sheet divides the inner cavity of the shell into a heat exchange cavity and a refrigerant cavity; the refrigerant cavity is divided into a liquid inlet cavity and a liquid outlet cavity; an insulation tube and a high-temperature inner box are installed in the heat exchange cavity, and the two ends of the U-shaped heat exchange tube are connected to the liquid inlet cavity and the liquid outlet cavity through the tube sheet; a connecting portion connecting the inside and outside of the insulation tube is provided between the insulation tube and the tube sheet; the high-temperature inner box is connected to the insulation tube; a gas inlet pipe and a gas outlet pipe are arranged on the shell, the gas inlet pipe is directly opposite to the high-temperature inner box and connected to the high-temperature inner box, and the gas outlet pipe is directly opposite to the connecting portion; a first thermal insulation material is filled between the high-temperature inner box and the shell, and the annular gap between the insulation tube and the cylinder body forms a dead gas zone, and the dead gas zone is connected to the inner cavity of the insulation tube through the connecting portion. By using the present application, the manufacturing cost of the equipment can be well reduced.
Description
Technical Field
The invention belongs to the technical field of chemical equipment, and particularly relates to a heat exchange device resistant to high temperature, high pressure and hydrogen corrosion.
Background
At present, a tube array heat exchanger is generally adopted for recycling the reaction heat of the synthesis gas reaction by adopting a heat exchanger, and because the temperature of the synthesis gas is higher and the synthesis gas contains high-concentration hydrogen, in order to ensure the safe operation of the heat exchanger, equipment is required to be made of high-temperature-resistant and high-hydrogen corrosion-resistant materials, so that the manufacturing cost of the heat exchanger is higher, the maintenance cost of the equipment is also higher, and the purchase cost of a reaction heat recycling device is high.
Disclosure of Invention
The application provides a heat exchange device resistant to high temperature, high pressure and hydrogen corrosion, which aims at the problem of higher manufacturing cost of the existing reaction heat recovery device and comprises a shell and a tube plate arranged in the shell, wherein the shell comprises a cylinder body, a first sealing flat cover and a second sealing flat cover which are arranged at two ends of the cylinder body, the tube plate divides an inner cavity of the shell into a heat exchange cavity and a refrigerant cavity, the heat exchange cavity is positioned between the tube plate and the first flat cover, and the refrigerant cavity is positioned between the tube plate and the second flat cover;
A partition plate is arranged in the refrigerant cavity and divides the refrigerant cavity into a liquid inlet cavity and a liquid outlet cavity which are not communicated with each other; a heat-insulating cylinder and a high-temperature internal header are arranged in the heat-insulating cylinder, and two ends of the U-shaped heat-insulating cylinder are respectively communicated with the liquid inlet cavity and the liquid outlet cavity through the tube plates;
The high Wen Nalian box is positioned on one side of the heat insulation cylinder, which is away from the tube plate, and the high temperature inner header is communicated with the heat insulation cylinder;
A first heat-preserving material is filled between the high-temperature inner header and the shell, an annular gap between the heat-insulating cylinder and the cylinder body is formed into a dead air zone, and the dead air zone is communicated with the inner cavity of the heat-insulating cylinder through a communicating part. The distance between the heat insulation cylinder and the shell is 50-100mm.
The gas inlet pipe is opposite to the high-temperature inner header, which means that the gas inlet pipe is positioned in the region of the cylinder corresponding to the high-temperature inner header in the radial direction. The gas outlet pipe faces the communicating part, which means that the gas outlet pipe is positioned in the area of the cylinder corresponding to the communicating part in the radial direction.
In order to facilitate the manufacture, installation and maintenance, the partition plate is provided with a bending part extending along the radial direction, a manhole is arranged on the bending part, and a blind plate is arranged on the manhole, so that the installation and maintenance of the components in the partition plate can be conveniently carried out through the manhole.
The application is mainly applied to an ammonia synthesis process, is used for recovering the reaction heat of the synthesis gas in the ammonia synthesis process, and when the heat exchange device works, the synthesis gas can enter an annular space between the heat insulation cylinder and the cylinder body through the communication part, and because one end of the annular space, which faces the first flat cover, is a closed end, the synthesis gas entering the annular space is basically in a non-flowing static state, so the annular space between the heat insulation cylinder and the cylinder body is called a dead gas area, and the heat insulation effect can be achieved because the gas is a bad heat conductor, and meanwhile, the whole heat insulation cylinder can be positioned in the surrounding of the synthesis gas, so the compression strength of the heat insulation cylinder can be reduced, the wall thickness of the heat insulation cylinder is reduced, and the manufacturing cost of equipment is reduced.
In the application, the gas outlet pipe is opposite to the communicating part, so that the synthetic gas is directly discharged out of the heat exchange device through the gas outlet pipe after flowing out of the heat insulation cylinder, and as most of the area of the shell is not directly contacted with the synthetic gas with higher temperature, the area which is not directly contacted with the high-temperature synthetic gas can be prepared by adopting materials with lower grade, thereby reducing the manufacturing cost of equipment. The arrangement of the first heat preservation layer can effectively reduce the outward heat transfer of the synthesis gas when the synthesis gas passes through the high-temperature internal header, and avoid the excessive temperature rise of part of the shells around the high-temperature internal header.
Meanwhile, as the synthesis gas in the dead gas zone is basically in a static state, the temperature is reduced to a certain extent, and the pressure of the shell can be effectively reduced. By using the application, most of the area of the shell is lower than 400 ℃, so that the shell can be made of common materials, and the manufacturing cost of equipment is reduced.
Further, in order to uniformly arrange the synthesis gas in the heat insulation cylinder, a gas uniform distributor is arranged between the high-temperature inner header and the heat insulation cylinder. Preferably, the gas uniform distributor is a ball head conical plate with a central part protruding towards the high-temperature internal joint box direction, and the radial outer end part of the ball head conical plate is provided with air holes. After the ball head conical plate is adopted to manufacture the gas uniform distributor, and after the air holes are formed in the radial outer end part of the ball head conical plate, the synthesis gas can move towards the central area of the heat insulation cylinder under the action of inertia after entering the heat insulation cylinder through the air holes due to the inclined arrangement of the radial outer end part of the ball head conical plate, and the synthesis gas is uniformly distributed in the heat insulation cylinder due to the blocking action of the U-shaped heat exchange tube.
Further, a first sealing diaphragm gasket is arranged between the first flat cover and the cylinder body in a cushioning manner, the first sealing diaphragm gasket completely isolates the first flat cover from the heat exchange cavity, and a first sealing surface formed by overlaying an Inconel600 material is arranged on the end face of the cylinder body facing the first flat cover;
And a second sealing diaphragm gasket is arranged between the second flat cover and the cylinder body in a gasket mode, the second sealing diaphragm gasket completely isolates the second flat cover from the refrigerant cavity, and a second sealing surface formed by overlaying an Inconel600 material is arranged on the end face, facing the second flat cover, of the cylinder body.
The materials of the first sealing diaphragm gasket and the second sealing diaphragm gasket are preferably 321SS stainless steel. The material of the first flat cover is preferably 1Cr5Mo alloy steel, and the material of the second flat cover is preferably 20MnMo alloy steel.
After the first sealing diaphragm and the second sealing diaphragm pad are arranged, the first flat cover and the second flat cover can be prevented from being in direct contact with the synthesis gas, the hydrogen corrosion resistance requirements of the first flat cover and the second flat cover are reduced, and only the temperature resistance performance of the first flat cover and the second flat cover is considered, so that the manufacturing cost of the first flat cover and the second flat cover is reduced, the first sealing diaphragm pad and the second sealing diaphragm pad are manufactured by adopting materials with good corrosion resistance performance, and the first sealing diaphragm pad and the second sealing diaphragm pad can be conveniently replaced.
Further, to improve the heat insulating performance. And an insulating layer is wrapped on the peripheral surface of the heat insulation cylinder, and an annular gap between the insulating layer and the cylinder body is formed into the dead gas area.
Further, a build-up seal layer is arranged on the first end face of the tube plate, which faces the first flat cover, the build-up seal layer fills the area of the first end face of the tube plate, which is positioned in the heat exchange cavity, and extends from the first end face along the inner surface of the cylinder body towards the first flat cover until exceeding the end face of the heat insulation layer, which faces the second flat cover. The thickness of the build-up seal layer is preferably 3.5-4.5mm.
The build-up welding layer is only arranged in a high-temperature area in direct contact with the synthesis gas, and the build-up welding layer can be adopted to manufacture parts in the area by adopting high-temperature resistant materials, and hydrogen corrosion resistant materials are not needed, so that the corrosion resistance level of the materials is reduced, and the manufacturing cost of equipment is reduced. Because the weld joints of the corresponding areas are plugged by the build-up welding layer, a weld-free area is formed, and hydrogen corrosion possibly caused by high-concentration hydrogen in the synthesis gas to the area at high temperature is avoided. The setting of dead gas district can reduce the temperature of the barrel region relative with the dead gas district, makes this partial region's temperature be less than 400 ℃, need not to adopt the heap welding layer to protect. The U-shaped heat exchange tube is inserted into the tube plate through the overlaying layer, so that the welding seam of the U-shaped heat exchange tube and the tube plate is positioned in a heat transfer medium, the welding seam between the U-shaped heat exchange tube and the tube plate is prevented from being exposed to the synthesis gas, and the protection of the tube head of the U-shaped heat exchange tube is facilitated.
Further, to ensure that the high temperature areas can have hydrogen corrosion resistance, the build-up sealing layer is at least 100mm beyond the end face of the heat insulation layer facing the second flat cover.
Further, the build-up seal layer covers the communication portion as viewed in the radial direction, and extends to and fills the inner wall of the gas outlet pipe. This design allows maximum protection of the area in contact with the synthesis gas.
Further, to avoid internal stress concentration due to inability of free expansion and contraction of the insulating cylinder at high temperatures, the end of the insulating cylinder facing the tube sheet is a free end on which the legs are mounted, which are slidingly supported on the weld overlay closure. The landing legs are provided with a plurality of holes, and the synthetic gas can enter the dead gas area from the gaps between the landing legs and the gap between the landing legs and the surfacing sealing layer. After the free end is arranged, the heat insulation cylinder can freely stretch and retract along with the change of temperature, so that deformation and cracking caused by the generation of internal stress are avoided, and the normal operation of equipment is influenced.
The heat transfer medium tube comprises a tube body, a tube side cavity, a tube plate, a gas inlet tube, a gas outlet tube, a heat transfer medium inlet and a heat transfer medium outlet, wherein the tube body sequentially comprises a high-temperature cavity, a main cavity and a tube side cavity along the direction from a first flat cover to a second flat cover, the high-temperature cavity is welded with the main cavity, and two ends of the tube plate are respectively welded on the main cavity and the tube side cavity;
The high-temperature cavity, the main cavity and the tube plate are all made of 12Cr2Mo1 alloy steel, the tube side cavity is made of 15CrMo alloy steel.
After dividing the cylinder into a plurality of sections, different thickness and material requirements can be set according to different temperature areas where the high-temperature cavity, the main cavity and the tube side cavity are located, so that the difficulty in machining caused by adopting a single cylinder is avoided.
When the heat exchange device works, the synthetic gas enters the high-temperature inner header through the gas inlet pipe, then enters the heat insulation cylinder to exchange heat with the heat transfer medium in the U-shaped heat exchange pipe, and the synthetic gas after the heat exchange is discharged through the gas outlet pipe;
The inlet temperature of the synthesis gas is 435-450 ℃, the outlet temperature of the synthesis gas is 405-420 ℃, and the temperature of the area of the cylinder body opposite to the dead gas area in the radial direction is lower than 400 ℃. Wherein the heat transfer medium is non-corrosive medium such as steam, water or heat conducting oil.
When steam is used as a heat transfer medium, the steam is saturated steam at the temperature of 250-260 ℃, and the saturated steam becomes superheated steam at the temperature of 395-405 ℃ after heat exchange.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
Fig. 4 is an enlarged view of a portion C in fig. 1.
Detailed Description
Referring to fig. 1, a heat exchange device resistant to high temperature, high pressure and hydrogen corrosion comprises a shell, a tube plate 11 arranged in the shell, wherein the shell comprises a cylinder 60, a first sealing flat cover 24 and a second sealing flat cover 14 arranged at two ends of the cylinder, the tube plate 11 divides an inner cavity of the shell into a heat exchange cavity 21 and a refrigerant cavity 22, the heat exchange cavity is arranged between the tube plate 11 and the first flat cover 24, and the refrigerant cavity is arranged between the tube plate 11 and the second flat cover 14. The housing is in a horizontal position with a first flat cover 24 mounted to the cylinder via a first bolt 17 and a second flat cover 14 mounted to the cylinder via a second bolt 27.
Referring to fig. 3, a first sealing diaphragm gasket 28 is installed between the first flat cover 24 and the cylinder 60, the first sealing diaphragm gasket 28 completely isolates the first flat cover 24 from the heat exchange chamber 21, and a first sealing surface 41 formed by Inconel600 material build-up welding is provided on an end surface of the cylinder 60 facing the first flat cover 24. In the drawing, the first sealing surface 41 is a black square.
Referring to fig. 4, a second sealing diaphragm gasket 18 is installed between the second flat cover 14 and the cylinder 60, the second sealing diaphragm gasket 18 completely isolates the second flat cover 14 from the refrigerant chamber 22, and a second sealing surface 13 formed by Inconel600 material build-up welding is provided on an end surface of the cylinder 60 facing the second flat cover 14. In the drawing, the second sealing surface 13 is a black square.
The first sealing diaphragm gasket and the second sealing diaphragm gasket are made of 321SS stainless steel. And the first flat cover 24 is made of a 1Cr5Mo alloy steel material, and the second flat cover 14 is made of a 20MnMo alloy steel material.
A dividing plate 19 is installed in the refrigerant cavity and divides the refrigerant cavity into a liquid inlet cavity 221 and a liquid outlet cavity 222 which are not communicated with each other, and a heat transfer medium inlet 15 communicated with the liquid inlet cavity 221 and a heat transfer medium outlet 12 communicated with the liquid outlet cavity 222 are installed on the shell. The dividing plate 19 is a folded plate, one side of the folded plate is welded on the tube plate 11, the other side is welded on the cylinder 60, the space surrounded by the dividing plate 19 and the cylinder 60 forms a liquid outlet cavity 222, and the folded plate is in non-contact with the second flat cover 14, so that the installation of the second flat cover 14 is facilitated.
The dividing plate 19 has a bent portion 191 extending in the radial direction of the cylindrical body 60, a manhole 192 is provided in the bent portion 191, connection between the U-shaped heat exchange tube 81 described below and the tube sheet can be maintained through the manhole 192, and a blind plate 193 is attached to the manhole 192.
A heat insulation cylinder 9 and a high-temperature internal header 16 are arranged in the heat exchange cavity, a baffle rod assembly 10 and a U-shaped heat exchange tube bundle 8,U formed by a plurality of U-shaped heat exchange tubes 81 are arranged in the heat insulation cylinder 9, and the U-shaped heat exchange tubes 81 are movably supported on a baffle rod 33 in the baffle rod assembly 10.
The end of the insulating cylinder 9 facing the tube sheet 11 is a free end on which a leg 92 is mounted.
A gas distributor 7 is arranged between the high-temperature internal header 16 and the heat insulation cylinder 9, the gas distributor is a ball head conical plate with a central part protruding towards the high-temperature internal header, and a gas hole is arranged at the radial outer end part of the ball head conical plate and is communicated with the high-temperature internal header 16 and the heat insulation cylinder 9. In the drawings, no air holes are shown, and only the center line 71 of the air holes is shown.
The two ends of each U-shaped heat exchange tube 81 are respectively welded on the tube plate 11, the two ends of each U-shaped heat exchange tube are respectively communicated with the liquid inlet cavity 221 and the liquid outlet cavity 222, one end of the heat insulation tube 9 facing the tube plate 11 is an open end, and a communicating part 91 for communicating the inside and the outside of the heat insulation tube is arranged between the open end and the tube plate.
The high temperature internal header 16 is positioned at one side of the heat insulation cylinder 9 away from the tube plate 11 and is communicated with the heat insulation cylinder, and a gas inlet pipe 31 and a gas outlet pipe 5 are arranged on the shell, the gas inlet pipe faces the high temperature internal header and is communicated with the high Wen Nalian box, and the gas outlet pipe faces the communicating part. The extension pipe 100 of the internals of the synthesis column is connected via a first flange 101 to a second flange 311 on the gas inlet pipe 31, between which an omega sealing ring 102 is arranged.
A first thermal insulation material 211 is filled between the high temperature header 16 and the housing. In this embodiment, the first thermal insulation material is made of aluminum silicate fiber felt.
In this embodiment, the heat insulating cylinder and the cylinder are coaxially arranged, the distance between the heat insulating cylinder and the housing is 80mm, that is, the difference between the outer diameter of the heat insulating cylinder and the inner diameter of the cylinder is 160mm, a heat insulating layer 93 with a thickness of 40mm is wrapped on the outer peripheral surface of the heat insulating cylinder, and an annular gap between the heat insulating layer 93 and the cylinder forms a dead air zone 35. It will be appreciated that when the insulation 93 is absent, then the annulus between the insulation drum and the drum forms the dead air zone 35.
Referring to fig. 2, a bead seal 70 is disposed on a first end face 111 of the tube sheet 11 facing the first flat cover 24, the bead seal 70 fills a region of the first end face of the tube sheet located within the heat exchange chamber 21, and the bead seal 70 extends from the first end face along the inner surface of the cylindrical shell 60 toward the first flat cover 24 until exceeding the end face of the insulation 93 facing the second flat cover 14. The bead seal 70 extends further toward the first flat cover 24 than the end face of the heat insulating layer facing the second flat cover, and the length M of the bead seal beyond the end face of the heat insulating layer facing the second flat cover is 100mm.
The build-up seal 70 covers the communication portion as seen in the radial direction, and the build-up seal 70 extends to the inner wall 51 of the gas outlet pipe 5 and fills the inner wall of the gas outlet pipe and then extends along the outer end face 52 of the gas outlet pipe.
The legs 92 on the insulation drum 9 are slidingly supported on the weld overlay 70. The dead air region 35 communicates with the inner cavity of the heat insulating cylinder through the gaps between the adjacent legs and the communicating portion 91. Because the legs are slidingly supported on the weld overlay 70, there is also some gap between the legs and the weld overlay 70, and gas can also pass through the gap between the legs and the weld overlay 70 and enter the dead gas region.
In this embodiment, the thickness of the build-up seal 70 is 4.0mm, it being understood that in other embodiments, the build-up seal may have a thickness of 3.5mm, 3.7mm, 3.9mm, 4.1mm, 4.3mm, or 4.5mm, although other thicknesses between 3.5-4.5mm are also possible.
In this embodiment, the cylinder 60 sequentially includes the high temperature cavity 4, the main cavity 6 and the tube side cavity 1 along the direction from the first flat cover 24 to the second flat cover 14, where the high temperature cavity 4 and the main cavity 6 are welded together, and two ends of the tube plate 11 are welded on the main cavity 6 and the tube side cavity 1 respectively.
A shower guide pipe 23 is arranged at the lower side of the high-temperature cavity 4, and a movable support 25 is arranged at the lower side of the cylinder.
A gas inlet pipe 31 is provided on the high temperature chamber 4, a gas outlet pipe is provided at one end of the main chamber 6 toward the tube sheet 11, and a heat transfer medium inlet 15 and a heat transfer medium outlet 12 are provided on the tube side chamber 1. The heat transfer medium inlet 15 is positioned at the lower side of the tube side cavity 1, and the heat transfer medium outlet 12 is positioned at the upper side of the tube side cavity 1.
The high-temperature cavity, the main cavity and the tube plate are all made of 12Cr2Mo1 alloy steel, the tube side cavity is made of 15CrMo alloy steel.
When the heat exchange device in the embodiment works, the synthetic gas enters the high Wen Nalian box 16 through the gas inlet pipe 100, then enters the heat insulation cylinder 9 to exchange heat with the heat transfer medium in the U-shaped heat exchange pipe, and the synthetic gas after heat exchange is discharged through the gas outlet pipe 5. The heat transfer medium enters the U-shaped heat exchange tube through the heat transfer medium inlet 15 and the liquid inlet cavity 221, exchanges heat with the synthesis gas, and is then discharged through the liquid outlet cavity 222 and the heat transfer medium outlet 12 in sequence.
The inlet temperature of the synthesis gas is 440+/-5 ℃, the outlet temperature of the synthesis gas is 405-410 ℃, and the temperature of the area of the cylinder body opposite to the dead gas area in the radial direction is 395-398 ℃.
In this embodiment, the heat transfer medium is saturated steam, the inlet temperature of the saturated steam at the heat transfer medium inlet 15 is 250-260 ℃, and the saturated steam becomes superheated steam with the temperature of 395-405 ℃ after passing through the U-shaped heat exchange tube.
It will be appreciated that in other embodiments, the heat transfer medium may also be water or a thermally conductive oil.
Claims (10)
1. A heat exchange device capable of resisting high temperature, high pressure and hydrogen corrosion is characterized by comprising a shell and a tube plate arranged in the shell, wherein the shell comprises a cylinder body, a first sealing flat cover and a second sealing flat cover which are arranged at two ends of the cylinder body, the tube plate divides an inner cavity of the shell into a heat exchange cavity and a refrigerant cavity, the heat exchange cavity is arranged between the tube plate and the first flat cover, the refrigerant cavity is arranged between the tube plate and the second flat cover, a partition plate is arranged in the refrigerant cavity and divides the refrigerant cavity into a liquid inlet cavity and a liquid outlet cavity which are not communicated with each other, a heat-insulating cylinder and a high-temperature inner header are arranged in the heat exchange cavity, a U-shaped heat exchange tube is arranged in the heat-insulating cylinder, two ends of the U-shaped heat exchange tube are respectively communicated with the liquid inlet cavity and the liquid outlet cavity through the tube plate, one end of the heat-insulating cylinder facing the tube plate is an open end, a communicating part communicated with the inside and outside of the heat-insulating cylinder is arranged between the open end and the tube plate, the high Wen Nalian is arranged at one side of the heat-insulating cylinder facing away from the tube plate, the partition plate is arranged on the heat-insulating cylinder, a heat-insulating cylinder is communicated with the inner cavity and the high temperature inlet and the air inlet and the high temperature air chamber is communicated with the air inlet and the high temperature chamber through the heat-insulating cylinder.
2. The heat exchange device of claim 1, wherein a gas distributor is disposed between the high temperature inner header and the heat shield.
3. The heat exchange device according to claim 1, wherein a first sealing diaphragm gasket is interposed between the first flat cover and the cylinder, the first sealing diaphragm gasket completely isolates the first flat cover from the heat exchange chamber, a first sealing surface formed by Inconel600 material build-up welding is provided on an end surface of the cylinder facing the first flat cover, a second sealing diaphragm gasket is interposed between the second flat cover and the cylinder, the second sealing diaphragm gasket completely isolates the second flat cover from the refrigerant chamber, and a second sealing surface formed by Inconel600 material build-up welding is provided on an end surface of the cylinder facing the second flat cover.
4. The heat exchange device of claim 1, wherein an insulating layer is wrapped around the outer peripheral surface of the heat insulating cylinder, and an annular space between the insulating layer and the cylinder is formed as the dead gas region.
5. The heat exchange device of claim 4 wherein a weld overlay seal is provided on a first end face of the tube sheet facing the first flat cover, the weld overlay seal being disposed over a region of the first end face of the tube sheet within the heat exchange cavity, and the weld overlay seal extending from the first end face along the inner surface of the cylinder toward the first flat cover until beyond an end face of the insulation layer facing the second flat cover.
6. The heat exchange device of claim 5 wherein the weld closure layer is at least 100mm beyond the end of the insulation layer facing the second flat cover.
7. The heat exchange device of claim 5, wherein the build-up seal covers the communication portion as viewed in a radial direction, and the build-up seal extends to and fills an inner wall of the gas outlet tube.
8. The heat exchange device of claim 5 wherein the end of the heat shield tube facing the tube sheet is a free end on which is mounted a leg that is slidably supported on the weld overlay closure.
9. The heat exchange device according to claim 1, wherein the cylinder comprises a high-temperature cavity, a main cavity and a tube side cavity in sequence along the direction from the first flat cover to the second flat cover, wherein the high-temperature cavity and the main cavity are welded together, two ends of the tube plate are respectively welded on the main cavity and the tube side cavity, the gas inlet tube is arranged on the high-temperature cavity, the gas outlet tube is arranged at one end of the main cavity facing the tube plate, the heat transfer medium inlet and the heat transfer medium outlet are arranged on the tube side cavity, the materials of the high-temperature cavity, the main cavity and the tube plate are all 12Cr2Mo1 alloy steel, and the material of the tube side cavity is 15CrMo alloy steel.
10. The heat exchange device according to any one of claims 1 to 9, wherein when the heat exchange device is in operation, the synthesis gas enters the high-temperature inner header through the gas inlet pipe, then exchanges heat with the heat transfer medium in the U-shaped heat exchange pipe after entering the heat insulation cylinder, the heat transfer medium enters the U-shaped heat exchange pipe through the heat transfer medium inlet and the liquid inlet cavity in sequence, exchanges heat with the synthesis gas, and then is discharged through the liquid outlet cavity and the heat transfer medium outlet in sequence, the inlet temperature of the synthesis gas is 435-450 ℃, the outlet temperature of the synthesis gas is 405-420 ℃, and the temperature of the area of the cylinder body opposite to the dead gas area in the radial direction is lower than 400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110029189.7A CN112683088B (en) | 2021-01-11 | 2021-01-11 | A heat exchange device resistant to high temperature, high pressure and hydrogen corrosion |
Applications Claiming Priority (1)
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| CN113405376B (en) * | 2021-07-05 | 2023-06-23 | 南京聚拓化工科技有限公司 | Full counter-flow type heat recovery device |
| CN113418409B (en) * | 2021-07-05 | 2023-02-03 | 南京聚拓化工科技有限公司 | Full-countercurrent double-sleeve type heat recovery device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839823A (en) * | 2017-03-24 | 2017-06-13 | 南京聚拓化工科技有限公司 | A kind of HP boiler water deflection bar type preheater and chemical reaction equipment |
| CN206638061U (en) * | 2017-03-24 | 2017-11-14 | 南京聚拓化工科技有限公司 | A kind of HP boiler water deflection bar type preheater and chemical reaction equipment |
| CN214407077U (en) * | 2021-01-11 | 2021-10-15 | 南京聚拓化工科技有限公司 | A heat exchange device resistant to high temperature, high pressure, and hydrogen corrosion |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839823A (en) * | 2017-03-24 | 2017-06-13 | 南京聚拓化工科技有限公司 | A kind of HP boiler water deflection bar type preheater and chemical reaction equipment |
| CN206638061U (en) * | 2017-03-24 | 2017-11-14 | 南京聚拓化工科技有限公司 | A kind of HP boiler water deflection bar type preheater and chemical reaction equipment |
| CN214407077U (en) * | 2021-01-11 | 2021-10-15 | 南京聚拓化工科技有限公司 | A heat exchange device resistant to high temperature, high pressure, and hydrogen corrosion |
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