An apparatus for reducing fouling of a heat exchanger

Abstract

This invention belongs to the field of heat exchanger technology and discloses a device for reducing scale buildup in heat exchangers, including a heat exchanger tank; wherein multiple heat exchanger tanks are provided, and the multiple heat exchanger tanks are used in series; a reactant inlet pipe is fixedly connected to the left side of the top of the heat exchanger tank. The above technical solution, by setting a drive water wheel and a connecting arm, when the reactant is continuously introduced into the heat exchanger tank and heat exchange components through the reactant inlet pipe, it can drive the drive water wheel and the first rotating arm to rotate, so that the connecting arm is linked to the second rotating arm to rotate, and then drive the rectangular connecting frame, the rectangular connecting box on the left, and the telescopic rectangular tube, the rectangular connecting tube and the scraping arc block above to move as a whole. Subsequently, the linkage component drives the bottom scraping and cleaning component to move as a whole, so that the upper and lower scraping and cleaning components scrape off the scale adhering to the inner wall of the heat exchanger tank and the inner side of the heat exchange component in opposite directions.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, specifically a device for reducing fouling in heat exchangers. Background Technology

[0002] In the oil and petrochemical industry, heat exchangers are commonly used equipment in various devices to improve energy efficiency. Typically, in the heat exchange equipment of some hydrogenation reaction devices, the raw materials and reaction products exchange heat to reduce the heat load of the heating furnace, thereby achieving energy saving.

[0003] However, in actual use, it was found that the heat exchange efficiency of this type of heat exchanger decreased rapidly, and the amount of scale increased with the length of operating time. The scale formation mainly manifested in two aspects: firstly, it caused an increase in heat exchanger pressure; secondly, the presence of scale reduced the heat exchange capacity, making it difficult to maintain long-term operation. In the chemical industry, the overhaul cycle for the entire plant is generally 3-4 years. However, in actual production operation, some hydrogenation units, due to raw material issues and process design problems, caused the heat exchanger to scale too quickly, making it difficult to maintain normal production operation within the 4-year overhaul cycle. Usually, shutdown to eliminate defects is required in about 2 years, resulting in significant direct economic losses and certain safety risks. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a device for reducing scale buildup in heat exchangers, which has the advantage of being able to scrape off and decompose scale buildup on the inner wall of the heat exchanger.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for reducing fouling in heat exchangers, comprising a heat exchanger tank; wherein multiple heat exchanger tanks are provided, and the multiple heat exchanger tanks are used in series; a reactant inlet pipe is fixedly connected to the left side of the top of the heat exchanger tank; a reactant outlet pipe is fixedly connected to the right side of the bottom of the heat exchanger tank; a hydrogen injection point inlet pipe is fixedly connected to the bottom of the heat exchanger tank and the lower left side of the heat exchange assembly; a hydrogen injection point outlet pipe is fixedly connected to the top of the heat exchanger tank and the upper right side of the heat exchange assembly; and a heat exchange assembly is disposed on... The heat exchanger tank has a central cavity. The scraping and cleaning assembly includes scraping arc blocks, which are movably installed on the upper and lower sides of the inner side of the heat exchange assembly and are slidably connected to the inner wall of the heat exchanger tank. Rectangular connecting pipes are provided at the bottom of the front and rear ends between the scraping arc blocks. Telescopic rectangular pipes are provided between the scraping arc blocks and located outside the rectangular connecting pipes. Rectangular connecting boxes are provided on both sides of the heat exchanger tank and located on the outer side of the other end of the rectangular connecting pipes. A driving assembly is provided on the left side of the front of the heat exchanger tank, and a linkage assembly is provided on the back of the heat exchanger tank and located inside the rear end of the rectangular connecting box.

[0006] Preferably, the number of the telescopic rectangular tubes is four, and the four telescopic rectangular tubes are of the same size.

[0007] Preferably, the drive assembly includes a drive water turbine, a first rotating arm, a connecting arm, a second rotating arm, and a rectangular connecting frame;

[0008] The driving water wheel is movably sleeved inside the heat exchanger tank and below the reactant inlet pipe. The first rotating arm is movably sleeved at the front end of the driving water wheel. The connecting arm is movably sleeved at the top of the first rotating arm. The second rotating arm is movably sleeved at the front of the heat exchanger tank, and the top end of the second rotating arm is movably sleeved with the other end of the connecting arm. The rectangular connecting frame is located at the front end of the left rectangular connecting box.

[0009] Preferably, the rear end of the top of the second rotating arm extends into the interior of the rectangular connecting frame and is movably sleeved with the inner wall of the rectangular connecting frame.

[0010] Preferably, the linkage assembly includes a first connecting pipe, a fixing plate, a rack and pinion, and a linkage gear;

[0011] The first connecting pipe is fixedly connected to the rear end of the rectangular connecting box. The fixing plate is fixedly installed on the top of the rear end of the first connecting pipe. The rack is fixedly installed on the inner side of the fixing plate. The linkage gear is movably sleeved on the back of the heat exchanger tank and the middle of the inner side of the rack. The inner side of the rack meshes with the surface of the linkage gear.

[0012] Preferably, a liquid inlet pipe is provided at the middle of the rear end of the heat exchanger tank, located below the linkage gear. The middle of both ends of the liquid inlet pipe is fixedly connected to a second connecting pipe, and the interior of the second connecting pipe is movably sleeved with the inner surface of the rear end of the first connecting pipe.

[0013] Preferably, the scraping arc block is provided with a spray assembly inside, the spray assembly including a telescopic spray frame and a first power spring;

[0014] The telescopic spray holder is movably installed inside the scraping arc block, and the first power spring is fixedly installed between the outer side of the telescopic spray holder and the inner wall of the scraping arc block.

[0015] Preferably, the top of the outer end of the telescopic sprayer is provided with a mesh.

[0016] Preferably, the surface of the heat exchange assembly is provided with a blocking and shrinking assembly located at the outer end of the inner side of the scraping arc block. The blocking and shrinking assembly includes a piston cylinder, a piston rod, an arc-shaped blocking block, and a second power spring.

[0017] The piston cylinder is fixedly installed on the surface of the heat exchange assembly and below the outer side of the scraping arc block. The piston rod is movably installed inside the piston cylinder. The arc-shaped blocking block is fixedly installed above the piston rod. The second power spring is fixedly installed between the inner side of the piston rod and the inner wall of the piston cylinder. The elastic force of the second power spring is greater than that of the first power spring.

[0018] Preferably, the two sides of the arc-shaped blocking block are designed with bevels.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The above technical solution, by setting up a drive water wheel and a connecting arm, allows the drive water wheel and the first rotating arm to rotate when reactants are continuously introduced into the heat exchanger tank and heat exchange components through the reactant inlet pipe. This causes the connecting arm to rotate in conjunction with the second rotating arm, which in turn drives the rectangular connecting frame, the rectangular connecting box on the left, the telescopic rectangular tube, the rectangular connecting tube, and the scraping arc block above to move as a whole. Subsequently, the linkage component drives the scraping and cleaning component at the bottom to move as a whole, so that the upper and lower scraping and cleaning components scrape off the deposited scale from the inner wall of the heat exchanger tank and the inner side of the heat exchange components in opposite directions.

[0021] This invention, by setting up a rack and a linkage gear, allows the rack, the fixing plate, the first connecting pipe, and the rack to move together when the rectangular connecting box at the left end moves. Due to the meshing relationship between the inner side of the rack and the surface of the linkage gear, the rack, the fixing plate, the first connecting pipe, and the rectangular connecting box at the right end can move synchronously. This ensures that when the drive component moves the upper scraping and cleaning component, the lower scraping and cleaning component moves smoothly in conjunction with it.

[0022] This invention, by setting a first power spring and an arc-shaped blocking block, allows the piston rod and the arc-shaped blocking block to move upwards due to the elastic force of the second power spring. This causes the arc-shaped blocking block to block the telescopic sprayer inside the scraping arc block. Subsequently, when the scraping arc block moves in opposite directions, it squeezes and pushes the inclined surface of the arc-shaped blocking block, causing the arc-shaped blocking block and the piston rod to move downwards, releasing the obstruction and fixation of the telescopic sprayer. Then, due to the elastic force of the first power spring, one end of the telescopic sprayer can be pushed outwards, allowing the extended mesh of the telescopic sprayer to smoothly spray out the scale inhibitor to decompose the scraped-off minor scale, while also inhibiting the formation of scale, thus greatly reducing the scale in the heat exchange assembly. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure on the back of the present invention;

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0027] Figure 5 This is a schematic diagram of the structure of the driving component of the present invention;

[0028] Figure 6 for Figure 5 A magnified view of the structure at point B in the middle;

[0029] Figure 7 This is a cross-sectional view of the scraping arc block of the present invention;

[0030] Figure 8 This is an exploded view of the spray assembly of the present invention;

[0031] Figure 9 This is a flowchart of the present invention.

[0032] In the diagram: 1. Heat exchanger tank; 2. Reactant inlet pipe; 3. Reactant outlet pipe; 4. Hydrogen injection point inlet pipe; 5. Hydrogen injection point outlet pipe; 6. Heat exchange assembly; 7. Scraping and cleaning assembly; 701. Scraping arc block; 702. Rectangular connecting pipe; 703. Telescopic rectangular pipe; 704. Rectangular connecting box; 8. Drive assembly; 801. Drive turbine; 802. First rotating arm; 803. Connecting arm; 804. Second rotating arm; 805. 9. Rectangular connecting frame; 10. Linkage assembly; 11. First connecting pipe; 12. Fixing plate; 13. Rack; 14. Linkage gear; 15. Infusion inlet pipe; 16. Second connecting pipe; 17. Spray assembly; 18. Telescopic spray holder; 19. First power spring; 10. Blocking and retraction assembly; 11. Piston cylinder; 12. Piston rod; 13. Arc-shaped blocking block; 14. Second power spring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1 to 8As shown, the present invention provides a device for reducing fouling in heat exchangers, comprising a heat exchanger tank 1; wherein multiple heat exchanger tanks 1 are provided, and the multiple heat exchanger tanks 1 are used in series; a reactant inlet pipe 2 is fixedly connected to the left side of the top of the heat exchanger tank 1; a reactant outlet pipe 3 is fixedly connected to the right side of the bottom of the heat exchanger tank 1; a hydrogen injection point inlet pipe 4 is fixedly connected to the bottom of the heat exchanger tank 1 and the lower left side of the heat exchange assembly 6; a hydrogen injection point outlet pipe 5 is fixedly connected to the top of the heat exchanger tank 1 and the upper right side of the heat exchange assembly 6; the heat exchange assembly 6 is disposed in the middle of the inner cavity of the heat exchanger tank 1; and a scraping and cleaning assembly. 7 includes scraping arc blocks 701, which are movably installed on the upper and lower sides of the inner side of the heat exchange component 6 and are slidably connected to the inner wall of the heat exchanger tank 1. Rectangular connecting pipes 702 are provided at the bottom of the front and rear ends between the scraping arc blocks 701. Telescopic rectangular pipes 703 are provided between the scraping arc blocks 701 and located outside the rectangular connecting pipes 702. Rectangular connecting boxes 704 located on both sides of the heat exchanger tank 1 are provided on the outer side of the other end of the rectangular connecting pipes 702. A drive component 8 is provided on the left side of the front of the heat exchanger tank 1. A linkage component 9 is provided on the back of the heat exchanger tank 1 and located inside the rear end of the rectangular connecting box 704.

[0035] When the reactant material above the reactant inlet pipe 2 enters the heat exchanger tank 1 and drives the drive assembly 8 to move, it can drive the rectangular connecting box 704 on the left, as well as the telescopic rectangular tube 703, rectangular connecting tube 702 and scraping arc block 701 on the inner wall of the heat exchanger tank 1 to move outward as a whole. Then, the linkage assembly 9 can link the rectangular connecting box 704 on the right and the telescopic rectangular tube 703, rectangular connecting tube 702 and scraping arc block 701 below to move outward in a synchronized manner. The two scraping and cleaning assemblies 7 are opposite to each other and scrape the scale on the inner wall of the heat exchanger tank 1. When multiple heat exchanger tanks 1 are connected in series, they can be connected to the second hydrogen injection point inlet pipe 4 through the hydrogen injection point drain pipe 5, and the first reactant drain pipe 3 and the second reactant inlet pipe 2 can be connected in sequence to achieve the purpose of series connection.

[0036] like Figure 5 and Figure 6 As shown, there are four telescopic rectangular tubes 703, and the four telescopic rectangular tubes 703 are the same size.

[0037] By adopting the above scheme, the upper and lower scraping arc block 701, the rectangular connecting tube 702, and the stretchable outer rectangular tube 703 can be moved to make the upper and lower scraping and cleaning components 7 move smoothly as a whole.

[0038] like Figure 1 and Figure 5 As shown, the drive assembly 8 includes a drive water turbine 801, a first rotating arm 802, a connecting arm 803, a second rotating arm 804, and a rectangular connecting frame 805;

[0039] The drive water wheel 801 is movably sleeved inside the heat exchanger tank 1 and below the reactant inlet pipe 2. The first rotating arm 802 is movably sleeved at the front end of the drive water wheel 801. The connecting arm 803 is movably sleeved at the top of the first rotating arm 802. The second rotating arm 804 is movably sleeved at the front of the heat exchanger tank 1, and the top end of the second rotating arm 804 is movably sleeved with the other end of the connecting arm 803. The rectangular connecting frame 805 is set at the front end of the left rectangular connecting box 704.

[0040] The above scheme is adopted: by setting up a connecting arm 803, when the reaction fluid enters the reactant inlet pipe 2, it will drive the drive water wheel 801 to drive the first rotating arm 802 to rotate, so that the connecting arm 803 can smoothly link with the second rotating arm 804 to rotate.

[0041] like Figure 1 and Figure 5 As shown, the rear end of the top of the second rotating arm 804 extends into the interior of the rectangular connecting frame 805 and is movably sleeved with the inner wall of the rectangular connecting frame 805.

[0042] The above solution is adopted: by setting a second rotating arm 804, when the second rotating arm 804 rotates, the part at the top rear end can move in a circular motion on the inner wall of the rectangular connecting frame 805, thereby driving the rectangular connecting frame 805 to drive the upper scraping and cleaning component 7 to move back and forth.

[0043] like Figure 2 As shown, the linkage component 9 includes a first connecting pipe 901, a fixing plate 902, a rack 903, and a linkage gear 904;

[0044] The first connecting pipe 901 is fixedly connected to the rear end of the rectangular connecting box 704. The fixing plate 902 is fixedly installed on the top of the rear end of the first connecting pipe 901. The rack 903 is fixedly installed on the inner side of the fixing plate 902. The linkage gear 904 is movably sleeved on the back of the heat exchanger tank 1 and the middle of the inner side of the rack 903. The inner side of the rack 903 meshes with the surface of the linkage gear 904.

[0045] The above scheme is adopted: by setting rack 903, when the rectangular connecting box 704 at the left end drives the first connecting pipe 901, the fixing plate 902 and the rack 903 to move left and right, it can drive the linkage gear 904 to rotate, so that the rack 903, the fixing plate 902, the first connecting pipe 901 and the rectangular connecting box 704 at the right end move left and right in the opposite direction.

[0046] like Figure 2As shown, a liquid inlet pipe 10 is provided in the middle of the rear end of the heat exchanger tank 1, located below the linkage gear 904. The middle of both ends of the liquid inlet pipe 10 is fixedly connected to a second connecting pipe 11, and the inside of the second connecting pipe 11 is movably sleeved with the inner surface of the rear end of the first connecting pipe 901.

[0047] The above solution is adopted: by providing a second connecting pipe 11, when the first connecting pipe 901 moves towards or away from each other, it can move horizontally along the inner wall of the second connecting pipe 11.

[0048] like Figure 8 As shown, the inside of the scraping arc block 701 is provided with a spray assembly 12, which includes a telescopic spray holder 1201 and a first power spring 1202.

[0049] The telescopic spray holder 1201 is movably installed inside the scraping arc block 701, and the first power spring 1202 is fixedly installed between the outer side of the telescopic spray holder 1201 and the inner wall of the scraping arc block 701.

[0050] The above solution is adopted: by setting a first power spring 1202, when the elastic force of the first power spring 1202 is released, it can push the telescopic sprayer 1201 to extend outward.

[0051] like Figure 8 As shown, the top of the outer end of the telescopic sprayer 1201 has a mesh opening.

[0052] The above solution is adopted: by means of the mesh design at the top of the outer end of the telescopic sprayer 1201, when the telescopic sprayer 1201 is driven to extend the outer end, the scale inhibitor can be sprayed out through the mesh to decompose the scale and inhibit its production.

[0053] like Figure 4 , Figure 7 and Figure 8 As shown, the surface of the heat exchange assembly 6 is provided with a blocking and shrinking assembly 13 located at the outer end of the inner side of the scraping arc block 701. The blocking and shrinking assembly 13 includes a piston cylinder 1301, a piston rod 1302, an arc-shaped blocking block 1303, and a second power spring 1304.

[0054] The piston cylinder 1301 is fixedly installed on the surface of the heat exchange assembly 6 and below the outer side of the scraping arc block 701. The piston rod 1302 is movably installed inside the piston cylinder 1301. The arc-shaped blocking block 1303 is fixedly installed above the piston rod 1302. The second power spring 1304 is fixedly installed between the inner side of the piston rod 1302 and the inner wall of the piston cylinder 1301. The elastic force of the second power spring 1304 is greater than that of the first power spring 1202.

[0055] The above solution is adopted: by setting a second power spring 1304, due to the elastic force of the second power spring 1304, the piston rod 1302 and the arc-shaped blocking block 1303 can be pushed upward as a whole, so as to block the telescopic spray rack 1201, so that the telescopic spray rack 1201 is stored in the scraping arc block 701, while compressing the first power spring 1202.

[0056] like Figure 4 , Figure 7 and Figure 8 As shown, the curved blocking block 1303 has a sloping design on both sides.

[0057] The above solution is adopted: by using the inclined design of the arc-shaped blocking block 1303, when the scraping arc block 701 moves left and right, the inclined surface of the arc-shaped blocking block 1303 can be pushed downward, so that the scraping arc block 701 can move smoothly left and right, while simultaneously blocking and releasing the telescopic spray rack 1201.

[0058] Working principle and usage process of this invention:

[0059] First, the operator can introduce crude oil and hydrogen into the heat exchange component 6 through the hydrogen injection point inlet pipe 4, which will raise the internal temperature of the heat exchange component 6. Then, the reactant can be added through the reactant inlet pipe 2 and heat exchanged through the heat exchange component 6. Finally, it can be discharged through the reactant outlet pipe 3 for collection.

[0060] Note: When multiple heat exchanger tanks 1 are configured, hydrogen can enter from the hydrogen injection point inlet pipe 4 and from the hydrogen injection point outlet pipe 5 into the next heat exchanger tank 1 for reactant heat exchange. When multiple heat exchanger tanks are connected in series, the first tank is connected to the second tank via the hydrogen injection point outlet pipe 5, and the first reactant outlet pipe 3 is connected to the second reactant inlet pipe 2, and so on, for series installation. (Refer to [reference needed]). Figure 9 ; Attached image description:

[0062] 1. E101A / B / C / D: Heat exchanger tank 1

[0063] 2. ①, ②, ③, ④, and ⑤ are the injection point locations.

[0064] 3. t1 and t2 are the temperature of the feedstock oil and the temperature of the hydrogen gas, respectively.

[0065] The process is as follows: The normal process is as follows: After the feedstock oil and hydrogen are mixed, they enter from the shell side of E101 D, and then enter the heating furnace through E101 C, E101 B, and E101A respectively for heating; the hot material reaction products enter from the tube side of E101A, and then enter the air-cooled water cooler through E101 B, E101 C, and E101 D respectively for cooling.

[0066] Process 1: When t1 < t2, the present invention adjusts the hydrogen injection point. It can be modified from the original position ⑤ to positions ①, ②, ③, and ④, while the position of the feedstock remains unchanged. Generally, it is adjusted according to the specific situation of production operation and the decomposition temperature of the scale. During the production operation, it is recommended to change to positions ② and ③. On the one hand, these positions can make better use of and absorb the heat of the reaction products. At the same time, they can reduce the pressure drop of the feedstock in the heat exchanger and reduce the power loss.

[0067] At the same time, the present invention can also adjust the feedstock injection point. During the adjustment process, it is mainly based on the actual production situation. For example, when the feedstock temperature is relatively high, such as in some petrochemical plants with a direct feed form and a relatively high feedstock temperature, at this time, the injection method can be changed from modifying hydrogen to modifying the feedstock for dynamic modification.

[0068] Process 2: When t1 > t2, the present invention adjusts the position of the feedstock. The dynamic modification position can be modified from the original position ⑤ to positions ②, ③, and ④, while the position of hydrogen remains unchanged. Specifically, it can be adjusted according to the decomposition temperature of the scale.

[0069] When the reaction fluid enters the heat exchanger tank body 1 through the reactant inlet pipe 2, the fluid will drive the driving water wheel 801 and the first rotating arm 802 to rotate. Then, through the connecting arm 803, it can drive the second rotating arm 804 to rotate synchronously, so that the part at the rear end of the top of the second rotating arm 804 makes a circular motion on the inner wall of the rectangular connecting frame 805, so as to smoothly drive the rectangular connecting frame 805 and the scraping and cleaning component 7 above to move back and forth on the outside and inside.

[0070] Note: As Figure 5 shown, it should be noted that the second rotating arm 804 is not fixedly connected to the rectangular connecting frame 805, but the part at the rear end of the top of the second rotating arm 804 extends to the inner wall of the rectangular connecting frame 805. Therefore, when the second rotating arm 804 rotates, the part at the rear end of the top of the second rotating arm 804 can slide on the inner wall of the rectangular connecting frame 805 to drive the rectangular connecting frame 805 and the rectangular connecting box 704 as a whole to move left and right. And also referring to Figure 5 it can be seen that the outside of the rectangular connecting pipe 702 is fixedly connected to the inside of the rectangular connecting box 704, and there is a corresponding description in Claim 1. Therefore, when the rectangular connecting frame 805 and the rectangular connecting box 704 move left and right, they can drive the scraping and cleaning component 7 inside as a whole to move.

[0071] Then, when the rectangular connecting box 704 moves, it can drive the first connecting pipe 901, the fixing plate 902 and the rack 903 to slide left and right on the surface of the second connecting pipe 11, so that the linkage gear 904 rotates and drives the rack 903, the fixing plate 902 and the first connecting pipe 901 on the other side and the scraping and cleaning assembly 7 below to move back and forth. Finally, the two scraping arc blocks 701 are driven to move back and forth in opposite directions to scrape off the slight scale adhering to the inner wall of the heat exchanger tank 1 located inside the heat exchange assembly 6.

[0072] Subsequently, when the upper and lower scraping arc blocks 701 move in opposite directions, the scraping arc blocks 701 can squeeze and push the inclined surface of the arc-shaped blocking block 1303, so that the arc-shaped blocking block 1303 and the piston rod 1302 are pushed downward as a whole, so as to smoothly release the blocking and fixing effect on the telescopic spray frame 1201. Then, the elastic force of the first power spring 1202 can be smoothly released, thereby pushing one end of the telescopic spray frame 1201 to protrude outward. The scale inhibitor is introduced into the scraping arc block 701 through the infusion inlet pipe 10, the second connecting pipe 11, the first connecting pipe 901, the rectangular connecting box 704, the telescopic rectangular pipe 703 and the rectangular connecting pipe 702. Finally, it is discharged through the mesh of the protruding part of the telescopic spray frame 1201 to decompose the scraped scale and inhibit the scale formation.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for reducing fouling in heat exchangers, characterized in that, Including the heat exchanger tank (1); There are multiple heat exchanger tanks (1), and the multiple heat exchanger tanks (1) are used in series. The reactant inlet pipe (2) is fixedly connected to the left side of the top of the heat exchanger tank (1); Reactant pipe (3) is fixedly connected to the right side of the bottom of the heat exchanger tank (1); The hydrogen injection point inlet pipe (4) is fixedly connected to the bottom of the heat exchanger tank (1) and the lower left side of the heat exchange assembly (6); The hydrogen injection point pipe (5) is fixedly connected to the top of the heat exchanger tank (1) and the upper right side of the heat exchange assembly (6); The heat exchange assembly (6) is located in the middle of the inner cavity of the heat exchanger tank (1); The scraping and cleaning assembly (7) includes scraping arc blocks (701), which are movably installed on the upper and lower sides of the inner side of the heat exchange assembly (6) and are slidably connected to the inner wall of the heat exchanger tank (1). Rectangular connecting pipes (702) are provided at the bottom of the front and rear ends between the scraping arc blocks (701). Telescopic rectangular pipes (703) located outside the rectangular connecting pipes (702) are provided between the scraping arc blocks (701). Rectangular connecting boxes (704) located on both sides of the heat exchanger tank (1) are provided on the outer side of the other end of the rectangular connecting pipes (702). A driving assembly (8) is provided on the left side of the front of the heat exchanger tank (1). A linkage assembly (9) located inside the rear end of the rectangular connecting box (704) is provided on the back of the heat exchanger tank (1).

2. The device for reducing heat exchanger fouling according to claim 1, characterized in that: The number of the telescopic rectangular tubes (703) is four, and the four telescopic rectangular tubes (703) are the same size.

3. The apparatus for reducing heat exchanger fouling according to claim 1, characterized in that: The drive assembly (8) includes a drive water turbine (801), a first rotating arm (802), a connecting arm (803), a second rotating arm (804), and a rectangular connecting frame (805); The drive water wheel (801) is movably sleeved in the inner cavity of the heat exchanger tank (1) and below the reactant inlet pipe (2). The first rotating arm (802) is movably sleeved in the front end of the drive water wheel (801). The connecting arm (803) is movably sleeved in the top of the first rotating arm (802). The second rotating arm (804) is movably sleeved in the front of the heat exchanger tank (1), and the top end of the second rotating arm (804) is movably sleeved in the other end of the connecting arm (803). The rectangular connecting frame (805) is set in the front end of the left rectangular connecting box (704).

4. The device for reducing heat exchanger fouling according to claim 3, characterized in that: The rear end of the top of the second rotating arm (804) extends into the interior of the rectangular connecting frame (805) and is movably sleeved with the inner wall of the rectangular connecting frame (805).

5. The apparatus for reducing fouling in heat exchangers according to claim 1, characterized in that: The linkage component (9) includes a first connecting pipe (901), a fixing plate (902), a rack (903), and a linkage gear (904); The first connecting pipe (901) is fixedly connected to the rear end of the rectangular connecting box (704). The fixing plate (902) is fixedly installed on the top of the rear end of the first connecting pipe (901). The rack (903) is fixedly installed on the inner side of the fixing plate (902). The linkage gear (904) is movably sleeved on the back of the heat exchanger tank (1) and the middle part of the inner side of the rack (903). The inner side of the rack (903) meshes with the surface of the linkage gear (904).

6. The apparatus for reducing heat exchanger fouling according to claim 1, characterized in that: The heat exchanger tank (1) has a liquid inlet pipe (10) located below the linkage gear (904) in the middle of its rear end. The middle of both ends of the liquid inlet pipe (10) is fixedly connected to a second connecting pipe (11). The inside of the second connecting pipe (11) is movably sleeved with the inner surface of the rear end of the first connecting pipe (901).

7. The apparatus for reducing heat exchanger fouling according to claim 1, characterized in that: The scraping arc block (701) is provided with a spray assembly (12) inside, the spray assembly (12) includes a telescopic spray holder (1201) and a first power spring (1202); The telescopic spray holder (1201) is movably installed inside the scraping arc block (701), and the first power spring (1202) is fixedly installed between the outer side of the telescopic spray holder (1201) and the inner wall of the scraping arc block (701).

8. The apparatus for reducing heat exchanger fouling according to claim 7, characterized in that: The top of the outer end of the telescopic sprayer (1201) has a mesh opening.

9. The apparatus for reducing fouling in heat exchangers according to claim 1, characterized in that: The surface of the heat exchange assembly (6) is provided with a blocking and shrinking assembly (13) located at the outer end of the inner side of the scraping arc block (701). The blocking and shrinking assembly (13) includes a piston cylinder (1301), a piston rod (1302), an arc-shaped blocking block (1303), and a second power spring (1304). The piston cylinder (1301) is fixedly installed on the surface of the heat exchange assembly (6) and below the outer side of the scraping arc block (701). The piston rod (1302) is movably installed inside the piston cylinder (1301). The arc-shaped blocking block (1303) is fixedly installed above the piston rod (1302). The second power spring (1304) is fixedly installed between the inner side of the piston rod (1302) and the inner wall of the piston cylinder (1301). The elastic force of the second power spring (1304) is greater than that of the first power spring (1202).

10. The apparatus for reducing fouling in heat exchangers according to claim 9, characterized in that: The arc-shaped blocking block (1303) has a sloping design on both sides.

Images