Graphite heat exchanger
By installing a water tank around the outer periphery of the upper end cap of the graphite heat exchanger and using the circulating cooling medium for cooling, the problem of damage caused by the inability to dissipate heat in time is solved, thereby improving the service life and maximum operating temperature of the graphite heat exchanger.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-24
AI Technical Summary
The existing graphite heat exchanger top end caps are unable to dissipate heat in time, which makes them prone to damage and cracking under high temperature conditions, affecting their service life and maximum operating temperature.
A water tank is installed around the outer periphery of the upper head to dissipate heat from the upper head using a cooling medium. The cooling medium in the water tank is circulated to cool the upper head and prevent it from overheating.
This effectively prevents damage and cracking of the upper end cap, and improves the service life and maximum operating temperature of the graphite heat exchanger.
Smart Images
Figure CN224163069U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, and specifically to a graphite heat exchanger. Background Technology
[0002] Graphite is widely used in heat exchangers in fields such as refrigeration, chemical processing, and petroleum due to its excellent acid corrosion resistance and thermal conductivity. Typically, a graphite heat exchanger consists of a shell and a graphite core housed within the shell. The heat exchange medium passes through the interior of the graphite core, while a cooling medium passes through the interior of the shell to cool the graphite core. This utilizes graphite's high thermal conductivity to achieve heat exchange between the cooling and heat exchange media.
[0003] Existing graphite heat exchangers typically have an upper end cap at the top of the graphite core, with an inlet on the upper end cap for the heat exchange medium to enter the block graphite heat exchanger core, thus allowing the heat exchange medium to be introduced into the graphite heat exchanger. However, in practical applications, the end cap body and end cap stub of the graphite heat exchanger cannot be cooled. When the temperature of the heat exchange medium is high, the end cap body and end cap stub often break and crack, affecting the service life of the graphite heat exchanger. Utility Model Content
[0004] The purpose of this invention is to overcome the problem that the head body and head short section of the upper end cap of existing graphite heat exchangers cannot be cooled, and the head body and head short section are prone to damage and cracking when the temperature of the heat exchange medium is high. This invention provides a graphite heat exchanger that can effectively prevent the upper end cap from being damaged and cracked due to excessive temperature.
[0005] To achieve the above objectives, this utility model provides a graphite heat exchanger, the graphite heat exchanger comprising:
[0006] A housing, the housing defining a cooling cavity and having a coolant inlet and a coolant outlet communicating with the cooling cavity;
[0007] A graphite core is disposed in the cooling cavity and has a longitudinal channel for the passage of the heat exchange medium.
[0008] An upper end cap, wherein the upper end cap is disposed on top of the graphite core and has an inlet for the heat exchange medium to enter the longitudinal channel; and
[0009] A water tank is fitted around the outer periphery of the upper end cap and is used to hold a cooling medium to dissipate heat from the upper end cap.
[0010] Preferably, the upper end cap includes an end cap body connected to the graphite core and an end cap stub disposed above the end cap body for connecting to an external pipe.
[0011] Preferably, the lower part of the end cap body is disposed within the housing, and the upper part of the end cap body extends out of the top of the housing; the housing is also provided with an exhaust port on the side wall corresponding to the upper end cap, and the exhaust port is used to discharge the cooling medium that has evaporated into the gas phase in the cooling chamber.
[0012] Preferably, the water tank has a cooling medium outlet at the top and a cooling medium inlet at the bottom, and the water tank is used to dissipate heat from the upper end cap through the cooling medium.
[0013] Preferably, the exhaust port is connected to the cooling medium inlet so as to introduce the cooling medium that has evaporated into a gas phase in the cooling chamber into the water tank.
[0014] Preferably, the graphite heat exchanger further includes an annular flange, the inner wall of which abuts against the outer peripheral side of the upper end cap, the lower part of which is connected to the top of the shell to seal the cooling chamber, and the water tank and the annular flange are detachably connected.
[0015] Preferably, the annular flange has an extension extending away from the graphite core, the water tank includes a cylindrical body, the lower edge of the cylindrical body has an outwardly folded portion, and the folded portion and the extension are detachably connected by fasteners.
[0016] Preferably, the graphite heat exchanger further includes:
[0017] An upper pressure plate, wherein the upper pressure plate is disposed above the upper end cap and has a through hole for the heat exchange medium to enter the upper end cap; and
[0018] A connecting roller, the two ends of which are detachably connected to the upper pressure plate and the extension, respectively, for pressing the upper pressure plate and the extension against each other.
[0019] Preferably, a limiting plate is connected to the side of the upper end cap, and the limiting plate is located above the extension to limit the minimum distance between the upper pressure plate and the extension;
[0020] Preferably, a sealing gasket is provided between the folded portion and the extension portion.
[0021] Preferably, the graphite heat exchanger further includes a lower end cap, which is connected to the bottom of the graphite core and has a discharge port for the heat exchange medium to flow out of the longitudinal channel;
[0022] Preferably, the graphite core comprises a plurality of interlocking sub-cores stacked vertically, each sub-core having a plurality of non-interconnected transverse and longitudinal through holes; the transverse through holes are used for the passage of a cooling medium, and the longitudinal through holes of the plurality of sub-cores are interconnected to form the longitudinal channel.
[0023] Through the above technical solution, the graphite heat exchanger provided by this utility model has a water tank fitted around the outer periphery of the upper end cap. The water tank is used to hold the cooling medium to dissipate heat from the upper end cap, thereby avoiding damage and cracking of the upper end cap due to inability to dissipate heat in time, improving the service life of the graphite heat exchanger, and also increasing the maximum operating temperature of the graphite heat exchanger. The shell houses the graphite core and allows the cooling medium to pass through; the graphite core enables heat exchange between the heat exchange medium and the cooling medium; the upper end cap has a feed inlet, which allows the heat exchange medium to be introduced into the graphite core. Attached Figure Description
[0024] Figure 1 This is a cross-sectional structural diagram of a graphite heat exchanger provided by this utility model;
[0025] Figure 2 yes Figure 1 A partial structural schematic diagram of the graphite heat exchanger shown.
[0026] Figure 3 yes Figure 1 The diagram shows a top view of the graphite heat exchanger.
[0027] Explanation of reference numerals in the attached figures
[0028] 1-Graphite heat exchanger; 11-Shell; 12-Graphite core; 13-Upper head; 14-Lower head; 15-Water tank; 16-Support leg; 17-Annular flange; 18-Upper pressure plate; 19-Connecting roller;
[0029] 110 - Cooling chamber; 111 - Coolant inlet; 112 - Coolant outlet; 113 - Exhaust port; 114 - Coolant drain port; 120 - Sub-core; 121 - Longitudinal through hole; 122 - Transverse through hole;
[0030] 130-Head body; 131-Head short section; 132-Inlet; 133-Limiting plate; 141-Outlet; 142-Discharge port; 150-Cylinder; 151-Folding section; 152-Cooling medium inlet; 153-Cooling medium outlet; 171-Extension section. Detailed Implementation
[0031] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0032] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," and "rear," etc., indicating orientation or positional relationships, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0033] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.
[0034] Please see Figure 1 , Figure 1 This is a cross-sectional structural diagram of a graphite heat exchanger provided by this utility model. This utility model provides a graphite heat exchanger 1, which includes a shell 11, a graphite core 12, an upper end cap 13, and a water tank 15. The shell 11 defines a cooling cavity 110 and has a coolant inlet 111 and a coolant outlet 112 communicating with the cooling cavity 110. The graphite core 12 is disposed in the cooling cavity 110 and has a longitudinal channel for the passage of the heat exchange medium. The upper end cap 13 is disposed on top of the graphite core 12 and has a feed inlet 132 for the heat exchange medium to enter the longitudinal channel. The water tank 15 is fitted around the outer periphery of the upper end cap 13 and is used to hold the cooling medium to dissipate heat from the upper end cap 13.
[0035] Understandably, when the graphite heat exchanger 1 is in use, the high-temperature heat exchange medium enters the longitudinal channel of the graphite core 12 through the feed port 132 of the upper end cap 13 and flows out of the graphite core 12 from the bottom of the longitudinal channel; the low-temperature coolant flows into the cooling chamber 110 through the coolant inlet 111 of the shell 11, contacts the outer wall of the graphite heat exchanger 1 for heat exchange in the cooling chamber 110, and flows out of the graphite heat exchanger 1 from the coolant outlet 112. Under the action of the graphite core 12, which has high thermal conductivity, the heat in the heat exchange medium is conducted to the coolant through the graphite core 12, realizing the heat exchange between the heat exchange medium and the coolant.
[0036] It is understood that the upper end cap 13 is used to seal the top of the cooling chamber 110, and also provides a channel for the heat exchange medium to enter the graphite core 12. To increase the heat exchange efficiency between the heat exchange medium and the graphite core 12, the longitudinal channel typically has a small diameter, which increases the difficulty of introducing the heat exchange medium into the longitudinal channel. Based on the above technical problems, the graphite heat exchanger 1 provided by this utility model includes an upper end cap 13, which has an inlet 132 for the heat exchange medium to enter the longitudinal channel; it is understood that the diameter of the inlet 132 is much larger than the diameter of the longitudinal channel, enabling the graphite heat exchanger 1 provided by this utility model to quickly and conveniently introduce the heat exchange medium.
[0037] However, in order to achieve the sealing of the top of the cooling cavity 110 by the upper end cap 13, the upper end cap 13 is usually configured such that its lower part is located in the cooling cavity 110 and its upper part extends out of the cooling cavity 110. Therefore, during use, the upper part of the upper end cap 13 cannot be cooled. When a high-temperature heat exchange medium is introduced into the upper end cap 13, the upper end cap 13 is prone to damage and cracking due to excessive temperature, which affects the service life of the graphite heat exchanger 1 and limits the maximum temperature of the heat exchange medium used in the graphite heat exchanger 1.
[0038] To address the aforementioned technical problems, the graphite heat exchanger 1 provided by this utility model includes a water tank 15, which is fitted around the outer periphery of the upper end cap 13 and is used to hold a cooling medium to dissipate heat from the upper end cap 13, thereby effectively cooling the upper end cap 13. In use, the upper end cap 13 is at least partially immersed in the cooling medium within the water tank 15, thus preventing damage and cracking of the upper end cap 13 due to insufficient heat dissipation, improving the service life of the graphite heat exchanger 1, and also increasing the maximum operating temperature of the graphite heat exchanger 1. In some preferred embodiments, the top of the water tank 15 is open, facilitating the introduction of the heat exchange medium into the feed inlet 132 inside the upper end cap 13.
[0039] Please refer to it again. Figure 1 And please see Figure 2 , Figure 2 yes Figure 1 The diagram shows a partial structural schematic of a graphite heat exchanger. In some preferred embodiments, the upper end cap 13 includes an end cap body 130 connected to the graphite core 12 and an end cap section 131 disposed above the end cap body 130 for connecting to an external pipe.
[0040] In the above embodiment, the upper end cap 13 includes an end cap stub 131 and an end cap body 130. The end cap stub 131 can be connected to an external pipe to allow the heat exchange medium to be introduced into the longitudinal channel of the graphite core 12; the end cap body 130 can be connected to the graphite core 12, thereby enabling the feed inlet 132 and the longitudinal channel to communicate with each other, and the end cap body 130 is also configured to seal the top of the cooling chamber 110. It can be understood that the feed inlet 132 is configured to penetrate the end cap body 130 and the end cap stub 131 in a vertical direction, so that the heat exchange medium enters the graphite core 12 sequentially through the end cap stub 131 and the end cap body 130.
[0041] Preferably, the end cap 131 is a graphite stub, and the end cap body 130 is a graphite end cap body, thereby making the connection between the end cap 131 and the end cap body 130 tighter. This also results in the upper end cap 13 having lower thermal resistance and higher thermal conductivity, thus giving the graphite heat exchanger 1 better heat exchange efficiency. Preferably, the bottom of the end cap body 130 and the top of the graphite core 12 are engaged.
[0042] Please refer to it again. Figure 1 and Figure 2 In some preferred embodiments, the lower part of the end cap body 130 is disposed within the housing 11, and the upper part of the end cap body 130 extends out of the top of the housing 11; the housing 11 is also provided with an exhaust port 113 on the side wall corresponding to the upper end cap 13, and the exhaust port 113 is used to discharge the cooling medium that has evaporated into the gas phase in the cooling chamber 110.
[0043] Typically, the coolant inlet 111 is located at the lower part of the housing 11, and the coolant outlet 112 is located at the upper part of the housing 11, so that the flow direction of the coolant is opposite to the flow direction of the heat exchange medium, resulting in better heat exchange performance for the graphite heat exchanger 1. However, to ensure smooth flow of coolant within the cooling chamber 110, the coolant outlet 112 is usually located at a certain distance from the top of the housing 11. In some preferred embodiments, a coolant drain port 114 is also provided at the bottom of the side wall of the housing 11 for periodically draining the coolant from the cooling chamber 110.
[0044] Understandably, the upper end cap 13 is the first to come into contact with the heat exchange medium, and therefore has a higher temperature during use. The temperature inside the cooling chamber 110 corresponding to the upper end cap 13 within the housing 11 is also high, making it prone to high-temperature vaporization of the coolant in this area during operation. The vaporized coolant concentrates at the very top of the cooling chamber 110, making it difficult to drain from the coolant outlet 112. However, if the vaporized coolant is not drained in time, it will lead to excessive pressure within the cooling chamber 110, thereby affecting the safe operation of the graphite heat exchanger 1.
[0045] To address the aforementioned technical issues, the housing 11 provided in this embodiment also has an exhaust port 113 on the side wall corresponding to the upper end cap 13, thereby discharging the cooling medium that has evaporated into a gaseous phase within the cooling chamber 110. Preferably, the exhaust port 113 is located at the topmost part of the side wall of the housing 11 (see...). Figure 1 and Figure 2 This allows for a more thorough removal of gas from the cooling chamber 110. More preferably, the exhaust port 113 and the coolant inlet 111 are located on opposite radial sides of the housing 11, thereby ensuring more complete circulation of the coolant within the cooling chamber 110.
[0046] Please refer to it again. Figure 1 and Figure 2 In some preferred embodiments, the water tank 15 has a cooling medium outlet 153 at the top and a cooling medium inlet 152 at the bottom, and the water tank 15 is used to dissipate heat from the upper end cap 13 through the cooling medium.
[0047] It is understood that, in this embodiment, the cooling medium inside the water tank 15 is configured to circulate, so that the cooling medium that has exchanged heat with the upper end cap 13 can be circulated and cooled before being introduced into the water tank 15 to cool and exchange heat with the upper end cap 13. This results in a better cooling effect of the water tank 15 on the upper end cap 13. Preferably, the cooling medium inlet 152 is located at the lower part of the water tank 15, and the cooling medium inlet 152 is located at the upper part of the water tank 15, so that the flow direction of the cooling medium in the water tank 15 is opposite to the flow direction of the medium to be exchanged heat, resulting in a better cooling effect of the cooling medium on the upper end cap 13.
[0048] Please refer to it again. Figure 1 and Figure 2 In some preferred embodiments, the exhaust port 113 is connected to the cooling medium inlet 152 to allow the cooling medium evaporated into the gas phase in the cooling chamber 110 to be introduced into the water tank 15.
[0049] It is understood that the exhaust port 113 is provided for discharging the gaseous cooling medium in the cooling chamber 110. However, when the water level in the cooling chamber 110 is higher than the exhaust port 113, the exhaust port 113 will also discharge a portion of the liquid cooling medium. In order to avoid the inability to recover this portion of the cooling medium, the graphite heat exchanger 1 provided in this embodiment has the exhaust port 113 and the cooling medium inlet 152, thereby collecting the cooling medium discharged from the exhaust port 113 and using this portion of the cooling medium to cool and dissipate heat for the upper end cap 13.
[0050] In practical use, the water level of the tank can be controlled simply by adjusting the flow rates of the coolant inlet 111 and coolant outlet 112 of the housing 11. In some preferred embodiments, the top of the tank is open, allowing the gas discharged from the vent 113 to be released into the environment, preventing excessive pressure in the water tank 15.
[0051] Please refer to it again. Figure 1 and Figure 2 And please see Figure 3 , Figure 3 yes Figure 1 The diagram shows a top view of the graphite heat exchanger. In some preferred embodiments, the graphite heat exchanger 1 further includes an annular flange 17, the inner wall of which abuts against the outer peripheral side of the upper end cap 13, and the lower part of the annular flange 17 is connected to the top of the housing 11 to seal the cooling chamber 110. The water tank 15 and the annular flange 17 are detachably connected.
[0052] It is understood that the annular flange 17 provided in this embodiment has its inner wall surface abutting against the outer peripheral side of the upper end cap 13, and its lower part connected to the top of the housing 11, thereby achieving a seal on the top of the cooling chamber 110. The water tank 15 and the annular flange 17 are detachably connected, making it easy to remove the water tank 15 from the housing 11 of the graphite heat exchanger 1 for cleaning, inspection, and maintenance.
[0053] Please refer to it again. Figure 1 , Figure 2 and Figure 3 In some preferred embodiments, the annular flange 17 has an extension 171 extending away from the graphite core 12, and the water tank 15 includes a cylindrical body 150 with an outwardly folded portion 151 at the lower edge of the cylindrical body 150. The folded portion 151 and the extension 171 are detachably connected by fasteners.
[0054] It is understood that in this embodiment, the cylindrical body 150 and the annular flange 17 together form a bottom-sealed box structure, thereby enabling the cooling medium to be contained for cooling the upper end cap 13. The folding portion 151 and the extension portion 171 enable a detachable connection between the water tank 15 and the annular flange 17, allowing the water tank 15 to be easily removed from the shell 11 of the graphite heat exchanger 1 for cleaning, inspection, and maintenance.
[0055] Continue reading Figure 3 In some embodiments, the outer periphery of the housing 11 is also connected to a support leg 16, which stably fixes the graphite heat exchanger 1 to the bracket.
[0056] Please refer to it again. Figure 1 , Figure 2 and Figure 3 In some preferred embodiments, the graphite heat exchanger 1 further includes an upper pressure plate 18 and a connecting roller 19. The upper pressure plate 18 is disposed above the upper end cap 13 and has a through hole for the heat exchange medium to enter the upper end cap 13; the two ends of the connecting roller 19 are detachably connected to the upper pressure plate 18 and the extension 171, respectively, for pressing the upper pressure plate 18 and the extension 171 against each other.
[0057] It is understood that the upper pressure plate 18 and the extension 171 in this embodiment have through holes through which the connecting roller 19 passes. It is also understood that the connecting roller 19 in this embodiment causes the upper pressure plate 18 and the extension 171 to press against each other, thereby causing the end cap body 130 and the graphite core 12 to press against each other, resulting in a tight connection between the upper end cap 13 and the graphite core 12. This prevents the fluid to be exchanged from flowing out through the gap between the graphite core 12 and the upper end cap 13, further increasing the sealing performance of the graphite heat exchanger 1.
[0058] In some optional embodiments, the graphite heat exchanger 1 includes four connecting rollers 19, which are evenly distributed around the upper end cap 13, thereby making the force on the upper pressure plate 18 and the extension 171 more uniform. In some optional embodiments, see [reference needed]. Figure 2 The upper pressure plate 18 is provided with a fastener on the side opposite to the extension 171 for adjusting the distance between the upper pressure plate 18 and the extension 171.
[0059] Please refer to it again. Figure 1 , Figure 2 and Figure 3In some preferred embodiments, a limiting plate 133 is connected to the side of the upper end cap 13. The limiting plate 133 is located above the extension 171 to limit the minimum distance between the upper pressure plate 18 and the extension 171. Preferably, the limiting plate 133 is an annular plate, thereby making the force between the limiting plate 133 and the annular flange 17 more uniform.
[0060] It is understood that the lower surface of the limiting plate 133 abuts against the upper surface of the annular flange 17, thereby limiting the position of the annular flange 17 and preventing the distance between the annular flange 17 and the upper pressure plate 18 from being too small, which would cause the upper end cap 13 and the graphite core 12 to be excessively squeezed and deformed, damaging the structure of the graphite heat exchanger 1.
[0061] In some preferred embodiments, a sealing gasket is provided between the folded portion 151 and the extension portion 171. It is understood that the bottom of the water tank 15 provided in this embodiment is configured with a hollow structure, and the folded portion 151 and the extension portion 171 of the annular flange 17 are tightly connected to each other to achieve a seal at the bottom of the water tank 15. To ensure the sealing effect at the bottom of the water tank 15, a sealing gasket is provided between the folded portion 151 and the extension portion 171 provided in this embodiment, thereby making it less likely for cooling medium leakage to occur at the bottom of the water tank 15.
[0062] Please refer to it again. Figure 1 In some preferred embodiments, the graphite heat exchanger 1 further includes a lower end cap 14, which is connected to the bottom of the graphite core 12 and has an outlet 141 for the heat exchange medium to flow out of the longitudinal channel;
[0063] It is understood that the lower end cap 14 is used to seal the bottom of the cooling chamber 110, and also provides a channel for the heat exchange medium to flow out of the graphite core 12. The diameter of the outlet 141 is much larger than the diameter of the longitudinal channel, allowing the heat exchange medium to flow out of the graphite heat exchanger 1 quickly and smoothly. Preferably, the outlet 141 is located on the side of the lower end cap 14, and the bottom of the lower end cap 14 also has a discharge port 142 for periodically discharging the heat exchange medium from the graphite core 12. Preferably, the lower end cap 14 and the bottom of the graphite core 12 are engaged.
[0064] Please refer to it again. Figure 1 and Figure 2In some preferred embodiments, the graphite core 12 includes a plurality of interlocking sub-cores 120 stacked vertically, each sub-core 120 having a plurality of non-communicating transverse through holes 122 and longitudinal through holes 121; the transverse through holes 122 are used for passing a cooling medium, and the longitudinal through holes 121 of the plurality of sub-cores 120 are interconnected to form the longitudinal channel.
[0065] It is understood that the graphite heat exchanger 1 provided in this embodiment is a block-hole type graphite heat exchanger 1, wherein the top and bottom of the sub-core 120 have engaging connection parts, and multiple sub-cores 120 are engaging with each other to form the graphite core 12. Preferably, the top of the uppermost sub-core 120 is also engaging with the bottom of the upper end cap 13; preferably, the bottom of the lowermost sub-core 120 is also engaging with the top of the lower end cap 14.
[0066] It is understood that the longitudinal through holes 121 of the multiple sub-cores 120 are interconnected to form the longitudinal channels, thereby enabling the passage of the heat exchange medium; the transverse through holes 122 are used for the passage of the cooling medium, thereby increasing the contact area between the graphite core 12 and the coolant. The graphite core 12 contacts both the heat exchange medium and the coolant, thereby achieving heat exchange between the heat exchange medium and the coolant.
[0067] Those skilled in the art should understand that the above embodiments or implementation methods are for illustrative purposes only and are not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or implementation methods or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments or implementation methods can be combined in any way.
Claims
1. A graphite heat exchanger (1), characterized in that, The graphite heat exchanger (1) includes: The housing (11) defines a cooling chamber (110) and has a coolant inlet (111) and a coolant outlet (112) communicating with the cooling chamber (110); A graphite core (12) is disposed in the cooling chamber (110) and has a longitudinal channel for the passage of the heat exchange medium; An upper end cap (13) is disposed on top of the graphite core (12) and has an inlet (132) for the heat exchange medium to enter the longitudinal channel; and Water tank (15), which is fitted around the outer periphery of the upper end cap (13), is used to hold cooling medium to dissipate heat from the upper end cap (13).
2. The graphite heat exchanger (1) according to claim 1, characterized in that The upper end cap (13) includes an end cap body (130) connected to the graphite core (12) and an end cap stub (131) disposed above the end cap body (130) for connecting to an external pipe.
3. The graphite heat exchanger (1) according to claim 2, characterized in that The lower part of the head body (130) is disposed in the housing (11), and the upper part of the head body (130) extends out of the top of the housing (11); the housing (11) is also provided with an exhaust port (113) on the side wall corresponding to the upper head (13), and the exhaust port (113) is used to discharge the cooling medium that evaporates into the gas phase in the cooling chamber (110).
4. The graphite heat exchanger (1) according to claim 3, characterized in that The water tank (15) has a cooling medium outlet (153) at the top and a cooling medium inlet (152) at the bottom. The water tank (15) is used to dissipate heat from the upper end cap (13) through the cooling medium.
5. The graphite heat exchanger (1) according to claim 4, characterized in that The exhaust port (113) is connected to the cooling medium inlet (152) to introduce the cooling medium evaporated into the gas phase in the cooling chamber (110) into the water tank (15).
6. The graphite heat exchanger (1) according to any one of claims 1-5, characterized in that The graphite heat exchanger (1) also includes an annular flange (17), the inner wall of which abuts against the outer peripheral side of the upper end cap (13), the lower part of which is connected to the top of the shell (11) for sealing the cooling chamber (110), and the water tank (15) and the annular flange (17) are detachably connected.
7. The graphite heat exchanger (1) according to claim 6, characterized in that The annular flange (17) has an extension (171) extending away from the graphite core (12), and the water tank (15) includes a cylindrical body (150) with an outwardly folded portion (151) at the lower edge of the cylindrical body (150), the folded portion (151) and the extension (171) being detachably connected by fasteners.
8. The graphite heat exchanger (1) according to claim 7, characterized in that, The graphite heat exchanger (1) also includes: An upper pressure plate (18) is disposed above the upper end cap (13) and has a through hole for the heat exchange medium to enter the upper end cap (13); and A connecting roller (19) is provided, the two ends of which are detachably connected to the upper pressure plate (18) and the extension (171) respectively, for pressing the upper pressure plate (18) and the extension (171) against each other.
9. The graphite heat exchanger (1) according to claim 8, characterized in that, A limiting plate (133) is connected to the side of the upper end cap (13), the limiting plate (133) being located above the extension (171) to limit the minimum distance between the upper pressure plate (18) and the extension (171); and / or A sealing gasket is provided between the folding portion (151) and the extension portion (171).
10. The graphite heat exchanger (1) according to any one of claims 1-5, characterized in that, The graphite heat exchanger (1) further includes a lower end cap (14), which is connected to the bottom of the graphite core (12) and has an outlet (141) for the heat exchange medium to flow out of the longitudinal channel; and / or The graphite core (12) includes a plurality of interlocking sub-cores (120) stacked vertically. Each sub-core (120) has a plurality of non-interconnected transverse through holes (122) and longitudinal through holes (121). The transverse through holes (122) are used to allow cooling medium to pass through. The longitudinal through holes (121) of the plurality of sub-cores (120) are interconnected to form the longitudinal channel.