Graphite heat exchanger

Abstract

This application discloses a graphite heat exchanger. By installing an impact-resistant plate on the side of the graphite block facing the feed inlet, the material entering the heat exchanger from the feed inlet first impacts the impact-resistant plate. After being buffered by the impact-resistant plate, the material then enters the heat exchange holes of the graphite block through the through holes. This avoids direct erosion of the graphite block by the material, thereby extending the service life of the equipment. Furthermore, because the end cap and lower cylinder are detachably connected, the graphite heat exchanger adopts a segmented design, with the end cap and lower cylinder separated. This facilitates easy installation and removal, allowing for periodic removal of the end cap to clean all heat exchange holes. This prevents localized blockage of heat exchange holes caused by prolonged operation, which would prevent uneven material flow through the heat exchanger and lead to material concentrating in only a few heat exchange holes, accelerating erosion and perforation of those holes. This also facilitates inspection and maintenance.

Description

Technical Field

[0001] This application relates to the field of titanium dioxide production technology, and in particular to a graphite heat exchanger. Background Technology

[0002] Graphite heat exchangers are highly efficient and corrosion-resistant heat exchange devices, particularly suitable for handling corrosive media. Therefore, graphite heat exchangers are commonly used as heat exchange equipment for dust-based slurry preparation. Due to the high concentration of the slurry and the presence of high-hardness materials such as titanium ore, calcined petroleum coke, and silica in the medium, the heat exchanger experiences severe wear. Prolonged operation can lead to perforation and leakage in the heat exchanger, damaging the equipment. Utility Model Content

[0003] The purpose of this application is to provide a graphite heat exchanger that can extend the service life of equipment.

[0004] The embodiments of this application can be implemented as follows:

[0005] In a first aspect, this utility model provides a graphite heat exchanger, comprising:

[0006] The housing includes a detachably connected lower cylinder and a head, the head having a feed inlet, and the inner wall of the lower cylinder forming an installation cavity;

[0007] Graphite blocks are installed inside the mounting cavity;

[0008] An impact-resistant plate is laid on the side of the graphite block facing the feed inlet, and the end cap abuts against the impact-resistant plate. The area of ​​the impact-resistant plate is the same as that of the graphite block, and the impact-resistant plate is provided with multiple through holes. Each vertical heat exchange hole on the graphite block corresponds to one of the through holes.

[0009] In an optional embodiment, the diameter of the narrowest part of the through hole is smaller than the diameter of the heat exchange hole.

[0010] In an optional embodiment, the through hole is a tapered hole, and the diameter of the through hole near the graphite block is smaller than the diameter of the through hole away from the graphite block.

[0011] In an optional embodiment, the impact-resistant plate is made of silicon carbide.

[0012] In an optional embodiment, the side of the impact-resistant plate away from the graphite block is covered with a first gasket, the first gasket being provided with a first through hole corresponding to each of the through holes.

[0013] In an optional embodiment, a second gasket is provided between the graphite block and the impact-resistant plate, the second gasket being provided with a second through hole corresponding to each of the through holes.

[0014] In an optional embodiment, the lower cylinder and the end cap are connected by bolts.

[0015] In an optional embodiment, the inner wall of the lower cylinder has a detachably mounted pressure plate that presses against the edge portion of the impact-resistant plate away from the graphite block, and the end cap abuts against the pressure plate.

[0016] In an optional embodiment, the pressure plate is connected to the lower cylinder by screws.

[0017] In an optional embodiment, the impact-resistant plate has a recessed platform formed on the edge of the side away from the graphite block, and the pressure plate presses against the bottom wall of the recessed platform.

[0018] Compared with the prior art, the beneficial effects of the embodiments of this application include, for example:

[0019] By installing an impact-resistant plate on the side of the graphite block facing the feed inlet, the material entering the graphite heat exchanger from the feed inlet first impacts the impact-resistant plate. After being buffered by the impact-resistant plate, it then enters the heat exchange holes of the graphite block through the through holes. This avoids direct erosion of the graphite block by the material, thus extending the service life of the equipment. Furthermore, because the end caps and lower cylinder are detachably connected, the graphite heat exchanger adopts a segmented design, with the end caps separated from the lower cylinder. This facilitates easy installation and removal, allowing for regular cleaning of all heat exchange holes by removing the end caps periodically. This prevents localized blockage of the heat exchange holes caused by prolonged operation, which would prevent uneven material flow through the heat exchanger and lead to material concentrating in only a few heat exchange holes, accelerating erosion and perforation of those holes. This also facilitates inspection and maintenance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a partial schematic diagram of a graphite heat exchanger according to an embodiment of this application.

[0022] Icons: 10-End cap; 11-Feed inlet; 20-Lower cylinder; 21-Mounting cavity; 30-Graphite block; 31-Heat exchange hole; 40-Impact plate; 41-Through hole; 42-Dental platform; 50-First gasket; 60-Second gasket; 70-Pressure plate; 71-Screw. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] The following is in conjunction with the appendix Figure 1This application provides a detailed description of some embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] This application discloses a graphite heat exchanger, which includes a shell, a graphite block 30 and an impact-resistant plate 40.

[0031] The housing has a connected feed inlet 11 and a mounting cavity 21;

[0032] Graphite block 30 is installed inside mounting cavity 21;

[0033] The impact-resistant plate 40 is laid on the side of the graphite block 30 facing the feed inlet 11. The area of ​​the impact-resistant plate 40 is the same as that of the graphite block 30, and the impact-resistant plate 40 is provided with multiple through holes 41. Each vertical heat exchange hole 31 on the graphite block 30 corresponds to a through hole 41.

[0034] In this embodiment, by providing an impact-resistant plate 40 on the side of the graphite block 30 facing the feed inlet 11, after the material enters the graphite heat exchanger from the feed inlet 11, it first impacts the impact-resistant plate 40. After being buffered by the impact-resistant plate 40, it enters the heat exchange hole 31 of the graphite block 30 through the through hole 41. This avoids the material directly eroding the graphite block 30, thereby extending the service life of the equipment.

[0035] The diameter of the narrowest part of the through hole 41 is smaller than the diameter of the heat exchange hole 31. This reduces the distribution area of ​​the material entering the heat exchange hole 31 through the through hole 41, thereby reducing the erosion of the inner wall of the heat exchange hole 31 and further avoiding direct erosion of the graphite block 30.

[0036] The through hole 41 can be a tapered hole, and the diameter of the end of the through hole 41 near the graphite block 30 is smaller than the diameter of the end of the through hole 41 away from the graphite block 30. In this way, the material will gather towards the center when passing through the through hole 41, and the distribution area of ​​the material in the heat exchange hole 31 is smaller and more concentrated, thereby further reducing the erosion of the inner wall of the heat exchange hole 31.

[0037] The impact plate 40 is made of silicon carbide, which has high hardness, excellent corrosion resistance and outstanding thermal stability. It can resist harsh environments such as wear, corrosion and high temperature. In addition, silicon carbide has low density and good thermal conductivity, which helps to reduce the weight of equipment and can dissipate heat quickly in high temperature environments to prevent local overheating.

[0038] The side of the impact-resistant plate 40 away from the graphite block 30 is covered with a first gasket 50. The first gasket 50 is provided with a first through hole corresponding to each through hole 41. The first through hole avoids blocking the material. The first gasket 50 can also play the roles of buffering, sealing and installation reliability.

[0039] There is a second gasket 60 between the graphite block 30 and the impact-resistant plate 40. The second gasket 60 is provided with a second through hole corresponding to each through hole 41. The second through hole prevents the material from entering the heat exchange hole 31. The second gasket 60 can also play a role in buffering, sealing and ensuring installation reliability.

[0040] The shell includes a detachably connected lower cylinder 20 and a head 10, for example, connected by bolts. The head 10 has a feed inlet 11, and the inner wall of the lower cylinder 20 forms an installation cavity 21. This segmented design of the graphite heat exchanger, with the head 10 separated from the lower cylinder 20, facilitates installation and removal. It also allows for periodic removal of the head 10 to clean all heat exchange holes 31, preventing blockage of these holes during prolonged operation and ensuring even material flow. This avoids the problem of material concentrating in a few heat exchange holes 31, accelerating erosion and perforation, and facilitates inspection and maintenance. The head 10 abuts against the first gasket 50 to press against the impact-resistant plate 40.

[0041] The inner wall of the lower cylinder 20 has a detachable pressure plate 70. The pressure plate 70 presses on the first gasket 50, and therefore also presses on the edge of the impact-resistant plate 40 away from the graphite block 30. Thus, after removing the end cap 10, the graphite block 30, gasket, and impact-resistant plate 40 remain compressed, allowing for direct online cleaning without the need for disassembly and cleaning as in existing technologies. This shortens the cleaning and maintenance cycle, significantly extends the equipment's lifespan, ensures heat exchange efficiency, and reduces equipment replacement costs. Furthermore, the first gasket 50 allows for a flexible, elastic contact between the pressure plate 70 and the impact-resistant plate 40, preventing damage to the impact-resistant plate 40. The end cap 10 abuts against the pressure plate 70, thereby indirectly abutting against the first gasket 50 and the impact-resistant plate 40.

[0042] In detail, the pressure plate 70 is connected to the lower cylinder 20 by screws 71, thereby realizing the detachable connection between the pressure plate 70 and the cylinder.

[0043] The impact plate 40 has a recessed platform 42 formed on the edge of the side away from the graphite block 30. The shape of the edge portion of the corresponding first gasket 50 is adapted to the recessed platform 42, covering the bottom wall and side wall of the recessed platform 42. The pressure plate 70 presses on the portion of the first gasket 50 corresponding to the recessed platform 42. Therefore, the pressure plate 70 presses on the bottom wall of the recessed platform 42 through the first gasket 50, thereby reducing the overall height of the graphite heat exchanger.

[0044] In summary, this application discloses a graphite heat exchanger. By providing an impact-resistant plate 40 on the side of the graphite block 30 facing the feed inlet 11, the material first impacts the impact-resistant plate 40 after entering the graphite heat exchanger from the feed inlet 11. After being buffered by the impact-resistant plate 40, the material then enters the heat exchange hole 31 of the graphite block 30 through the through hole 41. This avoids the material directly eroding the graphite block 30, thereby extending the service life of the equipment.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A graphite heat exchanger, characterized in that, include: The housing includes a detachably connected lower cylinder (20) and a head (10), the head (10) having a feed inlet (11), and the inner wall of the lower cylinder (20) forming an installation cavity (21); A graphite block (30) is installed inside the mounting cavity (21); An impact-resistant plate (40) is laid on the side of the graphite block (30) facing the feed inlet (11), and the end cap (10) abuts against the impact-resistant plate (40). The area of ​​the impact-resistant plate (40) is the same as that of the graphite block (30), and the impact-resistant plate (40) is provided with a plurality of through holes (41). Each vertical heat exchange hole (31) on the graphite block (30) corresponds to one of the through holes (41).

2. The graphite heat exchanger according to claim 1, characterized in that, The diameter of the narrowest part of the through hole (41) is smaller than the diameter of the heat exchange hole (31).

3. The graphite heat exchanger according to claim 1 or 2, characterized in that, The through hole (41) is a tapered hole, and the diameter of the through hole (41) near the graphite block (30) is smaller than the diameter of the through hole (41) away from the graphite block (30).

4. The graphite heat exchanger according to claim 1, characterized in that, The impact-resistant plate (40) is made of silicon carbide.

5. The graphite heat exchanger according to claim 1, characterized in that, The side of the impact-resistant plate (40) away from the graphite block (30) is covered with a first gasket (50), and the first gasket (50) is provided with a first through hole corresponding to each of the through holes (41).

6. The graphite heat exchanger according to claim 1, characterized in that, There is a second gasket (60) between the graphite block (30) and the impact-resistant plate (40), and the second gasket (60) is provided with a second through hole corresponding to each of the through holes (41).

7. The graphite heat exchanger according to claim 1, characterized in that, The lower cylinder (20) and the end cap (10) are connected by bolts.

8. The graphite heat exchanger according to claim 7, characterized in that, The inner wall of the lower cylinder (20) has a detachable pressure plate (70) that presses against the edge of the impact-resistant plate (40) away from the graphite block (30), and the end cap (10) abuts against the pressure plate (70).

9. The graphite heat exchanger according to claim 8, characterized in that, The pressure plate (70) is connected to the lower cylinder (20) by screws (71).

10. The graphite heat exchanger according to claim 8, characterized in that, The impact-resistant plate (40) has a recessed platform (42) formed on the edge of the side away from the graphite block (30), and the pressure plate (70) presses on the bottom wall of the recessed platform (42).

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