Anti-blocking structure of round-hole graphite heat exchanger
By installing a removable filter tank inside the feed pipe of the perforated graphite heat exchanger and designing a convenient replacement structure, the problem of channel blockage caused by particulate matter deposition in the perforated graphite heat exchanger is solved, and the efficient operation of the equipment is achieved.
Patent Information
- Application Number
- CN202522383555.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-10
AI Technical Summary
Graphite heat exchangers with round holes are prone to channel blockage due to particulate matter deposition during use, especially when the flow rate decreases or the flow direction changes, as particulate matter tends to settle to the bottom of the channel and cause blockage.
A removable filter tank is installed inside the feed pipe of a circular hole graphite heat exchanger. The filter tank intercepts large particles in the fluid, preventing them from entering the channel. A structure is designed that allows the filter tank to be replaced and cleaned without shutting down the system.
It effectively prevents large particles from clogging the round hole channel, improves the working efficiency of the device, and avoids mesh blockage affecting feeding by regularly replacing and cleaning the filter tank, thus maintaining continuous operation of the equipment.
Smart Images
Figure CN224933292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of graphite heat exchanger technology, specifically to an anti-clogging structure for a round-hole graphite heat exchanger. Background Technology
[0002] The circular hole graphite heat exchanger, also known as the block-hole graphite heat exchanger, is the most important and typical type of block-hole graphite heat exchanger. With its excellent corrosion resistance and good thermal conductivity, it occupies an irreplaceable position in heat exchange applications involving highly corrosive media in industries such as chemical, petroleum, metallurgy, and pharmaceuticals. It consists of several precision-machined graphite blocks as the core heat exchange element. Numerous parallel and evenly distributed circular holes are drilled into the graphite blocks, forming two sets of completely isolated fluid channels (usually called the "tube side" and "shell side"). One set consists of vertical circular hole channels that run through the entire block, serving as the channel for the first type of fluid (usually called the "tube-side" fluid). The other set consists of horizontal transverse hole channels distributed at certain intervals on the sides of the block. These holes do not penetrate each other, but their function is to connect the areas between adjacent vertical holes, forming the flow path for the second type of fluid (usually called the "shell-side" fluid), thus facilitating heat exchange through the graphite walls.
[0003] When fluid flows inside the circular tubes of a perforated graphite heat exchanger, a "laminar sublayer" with extremely slow flow velocity exists near the tube wall. Particulate matter, especially denser particles, easily settles to the bottom of the channel once it enters this region due to reduced flow velocity or a change in flow direction. The bottom of the circular tube is a perfect "sedimentation tank," where particles accumulate and eventually cause blockages. Larger particles in the fluid can also become stuck in the channel, causing further blockages. Summary of the Invention
[0004] In order to solve the problem that the circular hole channels (tube side or shell side) of some existing circular hole graphite heat exchangers are prone to blockage during use, the purpose of this utility model is to provide a blockage-proof structure for circular hole graphite heat exchangers.
[0005] To solve the above technical problems, the present invention adopts the following technical solution: a circular hole graphite heat exchanger anti-clogging structure, including a shell, with an upper end cap and a lower end cap detachably installed at the upper and lower ends of the shell via flanges, respectively. A tube-side feed pipe and a tube-side discharge pipe are fixedly installed on the upper and lower end caps, respectively. A shell-side feed pipe and a shell-side discharge pipe are fixedly installed on the shell, respectively. A hollow inner cylinder is fixedly installed inside the shell, and multiple graphite blocks are placed inside the inner cylinder, respectively. An installation groove is fixedly installed on both the tube-side feed pipe and the shell-side feed pipe. A filter tank can be detachably installed in both installation grooves. A fixing frame is fixedly installed on one side of each of the two installation grooves. A connecting plate is slidably installed in each of the two fixing frames. Limit rods are fixedly installed at both ends of each of the two connecting plates. Threaded rods are threadedly installed in each of the two fixing frames, and the threaded rods are threaded into the corresponding connecting plates. Two symmetrically distributed limit grooves are opened on one side of each of the two filter tanks, and one end of the limit rod can be inserted into the corresponding limit groove.
[0006] Preferably, each of the two filter tanks has a positioning groove at one of its four corners, and a positioning rod is fixedly installed at one of the four corners of the two filter tanks on the side away from the positioning groove. The positioning rod can be inserted into the corresponding positioning groove. Each of the two filter tanks has a sliding groove at one of its four corners at the bottom. Each of the eight sliding grooves has a hemispherical locking block that slides in it. Each of the eight sliding grooves has a spring installed in it, and one end of the spring contacts one end of the corresponding locking block. Each of the two mounting grooves has a hemispherical locking groove at one of its four corners on one side, and the locking block can be locked into the corresponding locking groove.
[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, by installing filter tanks in the tube-side feed pipe and the shell-side feed pipe, large particles in the fluid will be intercepted in the filter tanks during feeding, thereby preventing large particles from clogging the round hole channel. 2. In this utility model, the filter tank can be replaced periodically, the filter tank can be cleaned, and the particles in the filter tank can be poured out to prevent the mesh of the filter tank from clogging and affecting the feeding. Moreover, the entire replacement process can be carried out without stopping the machine, thereby improving the working efficiency of the device. Attached Figure Description
[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic diagram of the cross-sectional structure of the shell of this utility model; Figure 3 This is a schematic diagram of the first cross-sectional structure of the mounting groove of this utility model; Figure 4 This is a schematic diagram of the filter tank structure of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the filter tank of this utility model. Figure 6 This is a schematic diagram of the second cross-sectional structure of the mounting groove of this utility model.
[0010] In the diagram: 1. Shell; 2. Upper head; 3. Lower head; 4. Tube-side feed pipe; 5. Tube-side discharge pipe; 6. Shell-side feed pipe; 7. Shell-side discharge pipe; 8. Mounting groove; 801. Slot; 9. Filter groove; 901. Positioning rod; 902. Positioning groove; 903. Limiting groove; 904. Slide groove; 905. Spring; 906. Locking block; 10. Inner cylinder; 11. Graphite block; 12. Fixing frame; 13. Connecting plate; 14. Limiting rod; 15. Threaded rod. Detailed Implementation
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0012] Example: Figure 1-6As shown, this utility model provides an anti-clogging structure for a circular hole graphite heat exchanger, including a shell 1. An upper end cap 2 and a lower end cap 3 are detachably installed at the upper and lower ends of the shell 1 via flanges. A tube-side feed pipe 4 and a tube-side discharge pipe 5 are fixedly installed on the upper end cap 2 and lower end cap 3, respectively. A shell-side feed pipe 6 and a shell-side discharge pipe 7, distributed vertically, are fixedly installed on the shell 1. A perforated inner cylinder 10 is fixedly installed inside the shell 1. The gap between the inner cylinder 10 and the inner wall of the shell 1 forms a space where one fluid can flow, preventing the mixing of two fluids. Multiple graphite blocks 11, distributed vertically, are placed inside the inner cylinder 10. The graphite blocks 11 are existing technology, and each graphite block 11 has a large number of parallel and evenly distributed circular holes drilled on it, forming two sets of completely interlocking holes. The isolated fluid channels (commonly referred to as "tube side" and "shell side") consist of two sets: one set of vertical circular channels that run the entire length of the block, serving as the channel for the first type of fluid (commonly referred to as the "tube side" fluid); and another set of horizontal transverse channels distributed at intervals along the sides of the block. These channels do not penetrate the entire block, but their function is to connect the areas between adjacent vertical channels, forming the flow path for the second type of fluid (commonly referred to as the "shell side" fluid). Both the tube side feed pipe 4 and the shell side feed pipe 6 are fixedly equipped with mounting grooves 8. Filter tanks 9 can be detachably installed within each mounting groove 8. A fixing frame 12 is fixedly installed on one side of each mounting groove 8, and a connecting plate 13 is slidably installed within each fixing frame 12. Both ends of the connecting plate 13 are fixed... A limiting rod 14 is fixedly installed, and threaded rods 15 are threadedly installed in both fixed frames 12. The threaded rods 15 are threaded into the corresponding connecting plates 13. An adjustment knob is fixedly installed at one end of the threaded rod 15. Two symmetrically distributed limiting grooves 903 are opened on one side of each of the two filter tanks 9, and one end of the limiting rod 14 can be inserted into the corresponding limiting groove 903. Two fluids of different temperatures (high temperature and low temperature) can enter the shell 1 through the tube-side feed pipe 4 and the shell-side feed pipe 6. The tube-side fluid enters from the tube-side feed pipe 4, flows through the vertical circular hole channel (tube-side channel) on the graphite block 11, and flows out through the tube-side discharge pipe 5. The shell-side fluid flows in from the shell-side feed pipe 6, flows through the transverse hole channel (shell-side channel) on the graphite block 11, and flows through the tube. The fluid in the tube-side inlet pipe 4 exchanges heat through the graphite wall and then flows out from the shell-side outlet pipe 7. Heat is transferred from the higher-temperature fluid through the graphite wall to the lower-temperature fluid, thus achieving heat exchange. By installing filter tanks 9 in the tube-side inlet pipe 4 and the shell-side inlet pipe 6, large particles in the fluid are intercepted in the filter tanks 9 during feeding, thus preventing large particles from clogging the round hole channel. The filter tanks 9 can be replaced periodically, cleaned, and the particles in the filter tanks 9 emptied to prevent the mesh of the filter tanks 9 from clogging and affecting the feeding. The graphite blocks 11 should also be cleaned periodically. When the filter tank 9 needs to be replaced, first, the threaded rod 15 is rotated by adjusting the knob. The threaded rod 15 drives the connecting plate 13 to slide within the fixed frame 12.The connecting plate 13 drives the two corresponding limiting rods 14 to be pulled out from the corresponding limiting grooves 903 on the filter tank 9, thereby releasing the limiting of the filter tank 9. Then, the new filter tank 9 is aligned and fitted with the filter tank 9 in the mounting groove 8, and pushed forcefully to push out the filter tank 9 in the mounting groove 8. Simultaneously, the new filter tank 9 is inserted into the mounting groove 8. Then, by adjusting the knob, the threaded rod 15 is rotated. The threaded rod 15 drives the connecting plate 13 to slide within the fixed frame 12. The connecting plate 13 drives the two corresponding limiting rods 14 to insert into the corresponding limiting grooves 903 on the filter tank 9, limiting the new filter tank 9, thus completing the replacement of the filter tank 9. Moreover, the entire replacement process can be performed without stopping the machine, thereby improving the working efficiency of the device.
[0013] Positioning grooves 902 are provided at each of the four corners on one side of the two filter tanks 9. Positioning rods 901 are fixedly installed at each of the four corners on the side of the two filter tanks 9 away from the positioning grooves 902. The positioning rods 901 can be inserted into the corresponding positioning grooves 902. When replacing the filter tank 9, the positioning rods 901 on the new filter tank 9 can be inserted into the corresponding positioning grooves 902 on the filter tank 9 in the installation groove 8, so as to facilitate the docking and fitting of the two filter tanks 9.
[0014] Each of the two filter tanks 9 has a sliding groove 904 at its four bottom corners. Each of the eight sliding grooves 904 contains a hemispherical locking block 906, and each of the eight sliding grooves 904 contains a spring 905, with one end of the spring 905 contacting one end of the corresponding locking block 906. Each of the two mounting slots 8 has a hemispherical locking groove 801 at one of its four corners on one side, and the locking block 906 can be locked into the corresponding locking groove 801. During installation, when the hemispherical locking block 906 on the filter tank 9 reaches the corresponding hemispherical locking groove 801 in the mounting slot 8... When the filter is directly above the position of the spring 905, the locking block 906 is engaged in the corresponding slot 801 by the rebound force of the spring 905. The friction between the outer surface of the locking block 906 and the inner wall of the slot 801 limits the filter 9, which facilitates accurate positioning of the filter 9 and aligns the limiting rod 14 with the corresponding limiting groove 903. Since both the locking block 906 and the slot 801 are hemispherical, a push is all it takes to retract the locking block 906 into the corresponding sliding groove 904 and compress the spring 905, thereby releasing the filter 9 from its limit and pushing it out.
[0015] Working principle: In use, two fluids at different temperatures (high temperature and low temperature) can enter the shell 1 through the tube-side feed pipe 4 and the shell-side feed pipe 6. The tube-side fluid enters through the tube-side feed pipe 4, flows through the vertical circular hole channel (tube-side channel) on the graphite block 11, and flows out through the tube-side discharge pipe 5. The shell-side fluid flows in through the shell-side feed pipe 6, flows through the transverse hole channel (shell-side channel) on the graphite block 11, and exchanges heat with the fluid in the tube-side channel through the graphite wall. Then it flows out through the shell-side discharge pipe 7. Heat is transferred from the higher-temperature fluid through the graphite wall to the lower-temperature fluid, thus achieving heat exchange. By installing filter tanks 9 in the tube-side feed pipe 4 and the shell-side feed pipe 6, large particles in the fluid will be intercepted in the filter tanks 9 during feeding, thus preventing large particles from clogging the circular hole channel. The filter tanks 9 can be replaced periodically, cleaned, and the particles in the filter tanks 9 poured out to prevent the mesh of the filter tanks 9 from clogging and affecting the feeding. When the filter tank 9 needs to be replaced, first, the threaded rod 15 is rotated by adjusting the knob. The threaded rod 15 causes the connecting plate 13 to slide within the fixed frame 12. The connecting plate 13 causes the two corresponding limiting rods 14 to be pulled out from the corresponding limiting grooves 903 on the filter tank 9, thereby releasing the limiting of the filter tank 9. Then, the new filter tank 9 is aligned and fitted with the filter tank 9 in the mounting groove 8. The positioning rod 901 on the new filter tank 9 is inserted into the corresponding positioning groove 902 on the filter tank 9 in the mounting groove 8, and then pushed forcefully to push out the filter tank 9 in the mounting groove 8. At the same time, the new filter tank 9 is inserted into the mounting groove 8. When the hemispherical locking block 906 on the filter tank 9 reaches the corresponding hemispherical locking groove in the mounting groove 8... When the filter is directly above 801, the locking block 906 is engaged in the corresponding slot 801 by the rebound force of the spring 905. The friction between the outer surface of the locking block 906 and the inner wall of the slot 801 limits the filter tank 9. At this time, the limiting rod 14 is aligned with the corresponding limiting groove 903 on the filter tank 9. Then, the threaded rod 15 is rotated by adjusting the knob. The threaded rod 15 drives the connecting plate 13 to slide within the fixed frame 12. The connecting plate 13 drives the two corresponding limiting rods 14 to insert into the corresponding limiting groove 903 on the filter tank 9, limiting the new filter tank 9, thus completing the replacement of the filter tank 9. Moreover, the entire replacement process can be carried out without stopping the machine, thereby improving the working efficiency of the device.
[0016] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0017] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A clog-resistant structure for a perforated graphite heat exchanger, comprising a shell (1), characterized in that: The upper and lower ends of the shell (1) are detachably mounted with an upper end cap (2) and a lower end cap (3) via flanges. A tube-side feed pipe (4) and a tube-side discharge pipe (5) are fixedly mounted on the upper end cap (2) and the lower end cap (3), respectively. A shell-side feed pipe (6) and a shell-side discharge pipe (7) are fixedly mounted on the shell (1). A hollow inner cylinder (10) is fixedly mounted inside the shell (1). Multiple graphite blocks (11) are placed inside the inner cylinder (10). Mounting grooves (8) are fixedly mounted on both the tube-side feed pipe (4) and the shell-side feed pipe (6). Each of the two mounting slots (8) has a detachable filter tank (9). A fixed frame (12) is fixedly installed on one side of each of the two mounting slots (8). A connecting plate (13) is slidably installed in each of the two fixed frames (12). Limiting rods (14) are fixedly installed at both ends of each of the two connecting plates (13). A threaded rod (15) is threadedly installed in each of the two fixed frames (12), and the threaded rod (15) is threadedly inserted into the corresponding connecting plate (13). Two symmetrically distributed limiting slots (903) are opened on one side of each of the two filter tanks (9), and one end of the limiting rod (14) can be inserted into the corresponding limiting slot (903).
2. The anti-clogging structure for a circular-hole graphite heat exchanger as described in claim 1, characterized in that, Positioning grooves (902) are provided at the four corners of one side of each of the two filter tanks (9).
3. The anti-clogging structure for a circular-hole graphite heat exchanger as described in claim 2, characterized in that, Positioning rods (901) are fixedly installed at the four corners of the two filter tanks (9) away from the positioning groove (902), and the positioning rods (901) can be inserted into the corresponding positioning grooves (902).
4. The anti-clogging structure for a circular-hole graphite heat exchanger as described in claim 1, characterized in that, Each of the two filter tanks (9) has a sliding groove (904) at the four corners of its bottom end, and each of the eight sliding grooves (904) has a hemispherical locking block (906) slidingly engaged.
5. The anti-clogging structure for a circular-hole graphite heat exchanger as described in claim 4, characterized in that, Each of the eight grooves (904) is equipped with a spring (905), and one end of the spring (905) is in contact with one end of the corresponding block (906).
6. The anti-clogging structure for a circular-hole graphite heat exchanger as described in claim 1, characterized in that, Each of the two mounting slots (8) has a hemispherical slot (801) at one of the four corners on one side, and the card block (906) can be locked in the corresponding slot (801).