Efficient tube plate type heat exchange structure for washing water of olefin separation device

Abstract

The utility model relates to an efficient tube-plate heat exchange structure for washing water of an olefin separation device, which comprises a heat exchange shell and a plate tube, a heat exchange tube; a tube box; a cooling water inlet and a cooling water outlet are formed in the positions, close to the end of the heat exchange shell, of the side wall of the heat exchange shell and are far away from each other, a heat exchange water inlet and a heat exchange water outlet are formed in the tube box, and the heat exchange water inlet is close to the cooling water outlet. Cleaning assemblies are arranged in the heat exchange tubes, each cleaning assembly comprises a cleaning rod penetrating through the corresponding heat exchange tube and a cleaning plate used for scraping away objects covered in the corresponding heat exchange tube, the diameter of each cleaning rod is smaller than the inner diameter of the corresponding heat exchange tube, and the diameter of each cleaning plate is equal to the inner diameter of the corresponding heat exchange tube. Liquid needing to be cooled penetrates through the heat exchange pipe and then directly flows out of the heat exchange shell, the number of the liquid capable of being cooled in unit time is increased, the cooling efficiency is improved, and meanwhile after covering objects appear in the heat exchange pipe, the cleaning block can penetrate through the heat exchange pipe to clean the inner wall of the heat exchange pipe.

Description

Technical Field

[0001] This application relates to the technical field of liquid cooling equipment, and particularly to a high-efficiency tube-sheet heat exchange structure for wash water in an olefin separation device. Background Art

[0002] Currently, after the reaction in the olefin separation device, the reaction gas produced is quenched and then introduced into a wash tower for cooling. After that, the cooled liquid is passed through a filter and then enters a settling tank for subsequent utilization.

[0003] Currently, the cooling of the wash tower is usually carried out using a floating head heat exchanger, that is, the liquid to be cooled is passed into the heat exchange tubes. Then the liquid flows out from the heat exchange tubes on one side and is redirected back into the heat exchange tubes on the other side through the guidance of the floating head, and flows out from the heat exchange tubes on the other side to complete the cooling. The heat exchange tubes are immersed in flowing cooling water, and the cooling water is used to cool the heat exchange tubes, thereby achieving the effect of cooling the liquid in the heat exchange tubes.

[0004] Since the heat exchange tubes in the floating head heat exchanger need to drive the liquid to move in one direction and then drive the liquid to move in the other direction within the same volume, the number of liquids that can pass through the floating head heat exchanger per unit time is small, resulting in low heat exchange efficiency.

[0005] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0006] In order to improve the cooling efficiency, this application provides a high-efficiency tube-sheet heat exchange structure for wash water in an olefin separation device.

[0007] The high-efficiency tube-sheet heat exchange structure for wash water in an olefin separation device provided by this application adopts the following technical solutions:

[0008] A high-efficiency tube-sheet heat exchange structure for wash water in an olefin separation device includes:

[0009] A heat exchange shell with both ends open;

[0010] Tube sheets with a number of connection holes formed on their surfaces, and the tube sheets are respectively arranged at both ends of the heat exchange shell to close the openings of the heat exchange shell;

[0011] Heat exchange tubes arranged between adjacent tube sheets and respectively communicating with the connection holes;

[0012] Tube boxes respectively arranged on the sides of the tube sheets away from each other, with the inner end of the tube box close to the tube sheet having an open inner support and communicating with all the connection holes on the same tube sheet;

[0013] Cooling water inlets and cooling water outlets are respectively arranged at positions on the side wall of the heat exchange shell close to its ends. The cooling water inlets and the cooling water outlets are far away from each other. Heat exchange water inlets and heat exchange water outlets are respectively arranged on the tube sheet. The heat exchange water inlets are arranged close to the cooling water outlets.

[0014] Cleaning components are arranged in all the heat exchange tubes. The cleaning components include cleaning rods penetrating through the heat exchange tubes and cleaning plates for scraping off the deposits inside the heat exchange tubes. The diameter of the cleaning rods is smaller than the inner diameter of the heat exchange tubes, and the diameter of the cleaning plates is equal to the inner diameter of the heat exchange tubes.

[0015] By adopting the above technical solution, the liquid to be cooled flows directly outside the heat exchange shell after passing through the heat exchange tubes, increasing the quantity of the liquid that can be cooled per unit time and the cooling efficiency. At the same time, after deposits appear inside the heat exchange tubes, the cleaning blocks can be passed through the heat exchange tubes to clean the inner walls of the heat exchange tubes.

[0016] Optionally: A conical part is arranged at one end of the cleaning plate close to the cleaning rod. The bottom diameter of the conical part is equal to the diameter of the cleaning plate, and the vertex of the conical part is arranged at a position far away from the cleaning plate.

[0017] By adopting the above technical solution, the conical part is used to guide the moving direction of the cleaning plate towards the inside of the heat exchange tube, making it easier for the cleaning block to enter the heat exchange tube to clean the deposits on the inner wall of the heat exchange tube.

[0018] Optionally: The ends of the cleaning rods far away from the cleaning plates are commonly connected with a limiting component for limiting the positions of the cleaning rods. The limiting component includes a limiting plate connected to the cleaning rods and a plurality of fastening bolts penetrating through the limiting plate. The fastening bolts are rotatably connected to the limiting plate, and the ends of the fastening bolts far away from the limiting plate are threadedly connected to the tube sheet.

[0019] By adopting the above technical solution, the cleaning rods are connected by the limiting plate, so that the cleaning rods can be passed through the heat exchange tubes at one time to clean the inside of the heat exchange tubes, making the cleaning of the heat exchange tubes more convenient.

[0020] Optionally: A driving part for pushing the limiting plate to move away from the tube sheet is detachably connected to the limiting plate. The driving part penetrates through the limiting plate and is in threaded cooperation with the limiting plate. The driving part can abut against the tube sheet close to the limiting plate.

[0021] By adopting the above technical solution, the limiting plate is driven to move by rotating the driving part. During the process of moving the limiting plate, there is no need to directly apply force to the limiting plate. The force is transmitted to the limiting plate by rotating the driving part, making the movement of the limiting plate more convenient.

[0022] Optional: An abutment plate is further provided on the side of the limiting plate close to the plate tube, and a plurality of clearance holes that can respectively correspond to the connection holes on the plate tube are penetrated through the surface of the abutment plate. The abutment plate can abut on the plate tube, and the end of the driving member close to the plate tube abuts on the abutment plate.

[0023] By adopting the above technical solution, the driving member will not directly abut against the plate tube, and the force will be transmitted to the plate tube through the abutting plate, so that the pressure between the driving member and the plate tube will not be too large, making the plate tube less likely to be damaged.

[0024] Optionally: a plurality of positioning members are provided on the plate tube, a plurality of positioning grooves are provided on the abutting plate, and the positioning members can be inserted into the positioning grooves.

[0025] By adopting the above technical solution, the positioning piece is used to align the clearance hole with the connecting hole, so that when the cleaning block processes the heat exchange tube, the axis of the cleaning rod coincides with the axis of the cleaning block, making the cleaning block easier to move in the heat exchange tube.

[0026] Optionally: the fastening bolt is passed through the abutment plate and is threadably engaged with the abutment plate, and the abutment plate can abut against the end surface of the limiting plate close to the plate tube.

[0027] By adopting the above technical solution, when the heat exchange tube does not need to be cleaned, the abutment plate can be set close to the limit plate by using fastening bolts, so that the abutment plate will not directly abut on the plate tube, making the flow of liquid less likely to be obstructed.

[0028] Optionally, when the fastening bolt is threadedly connected to the plate tube, the side wall of the cleaning rod abuts against the inner wall of the heat exchange tube.

[0029] By adopting the above technical solution, when the cleaning block is not in the heat exchange tube, the cleaning rod can be supported by the heat exchange tube, so that the overall shape of the cleaning rod is not easily deformed.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By allowing the liquid to enter from one end of the heat exchange tube and flow out from the other end of the heat exchange tube, the amount of liquid that can pass through per unit time is increased, thereby improving the cooling efficiency;

[0032] 2. Use the cleaning block to clean the inside of the heat exchange tube directly. After cleaning, place the cleaning block in the tube box to make the next cleaning more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0034] Figure 2This is a schematic diagram for showing the internal structure of the heat exchange shell in the embodiment of the present application;

[0035] Figure 3 This is a schematic diagram for showing the structure of the limiting component in the embodiment of the present application.

[0036] In the figure, 1 is the heat exchange shell; 11 is the cooling water inlet; 12 is the cooling water outlet; 2 is the plate tube; 21 is the connection hole; 22 is the heat exchange tube; 23 is the positioning member; 3 is the tube box; 31 is the heat exchange water inlet; 32 is the heat exchange water outlet; 4 is the cleaning component; 41 is the cleaning rod; 42 is the cleaning plate; 43 is the tapered portion; 5 is the limiting component; 51 is the limiting plate; 52 is the fastening bolt; 53 is the driving member; 54 is the abutting plate; 541 is the relief hole; 542 is the positioning groove. Detailed implementation manners

[0037] The following further elaborates on the present application in conjunction with the accompanying drawings.

[0038] A highly efficient tube-and-plate heat exchange structure for washing water in an olefin separation device disclosed in the present application, as Figure 1 and Figure 2 shown, includes a heat exchange shell 1 with both ends open, plate tubes 2 respectively installed at both ends of the heat exchange shell 1, a plurality of heat exchange tubes 22 arranged between two adjacent plate tubes 2, and two tube boxes 3 respectively arranged at the ends of the two plate tubes 2 away from each other. Cooling water inlets 11 and cooling water outlets 12 are respectively arranged at positions close to the ends of the side surface of the heat exchange shell 1. The cooling water inlets 11 and the cooling water outlets 12 are communicated in the inner cavity of the heat exchange shell 1 and are respectively arranged on both sides of the axis of the heat exchange shell 1. The diameter of the plate tube 2 is equal to the outer diameter of the heat exchange shell 1. A plurality of connection holes 21 are opened on the end surface of the plate tube 2. The connection holes 21 on the two plate tubes 2 correspond to each other and are both located within the openings at both ends of the heat exchange shell 1. Both ends of the heat exchange tube 22 are fixedly connected to the end surfaces of the plate tubes 2 close to each other, and the heat exchange tube 22 is respectively communicated with the connection hole 21. The inner diameter of the heat exchange tube 22 is equal to the inner diameter of the connection hole 21. The end surface of the tube box 3 close to the plate tube 2 is open. The tube box 3 is installed on the end surface of the plate tube 2 away from the heat exchange shell 1 and is communicated with the connection hole 21. A heat exchange water inlet 31 and a heat exchange water outlet 32 are respectively arranged on the two tube boxes 3. The heat exchange water inlet 31 and the heat exchange water outlet 32 are respectively arranged on both sides of the axis of the tube box 3. The heat exchange water inlet 31 is arranged close to the cooling water outlet 12 and the two are located on the same side of the axis of the heat exchange shell 1.

[0039] A cleaning assembly 4 for cleaning the internal deposits is provided in each of the heat exchange tubes 22. The cleaning assembly 4 includes a cleaning rod 41 inserted into the heat exchange tube 22 and a cleaning plate 42 mounted at one end of the cleaning rod 41. The cleaning rod 41 is inserted into the heat exchange tube 22 and slides therein. The diameter of the cleaning rod 41 is smaller than the inner diameter of the heat exchange tube 22, and the diameter of the cleaning plate 42 is equal to the inner diameter of the heat exchange tube 22. When the cleaning plate 42 moves within the heat exchange tube 22, the deposits on the inner cavity of the heat exchange tube 22 can be scraped off by the cleaning plate 42, thereby cleaning the inner cavity of the heat exchange tube 22.

[0040] Since the cleaning plate 42 needs to be located within the header 3 before cleaning, in order to make it easier for the cleaning plate 42 to enter the connection hole 21, a tapered portion 43 is provided on the end face of the cleaning plate 42 close to the cleaning rod 41. The bottom diameter of the tapered portion 43 is equal to the diameter of the cleaning plate 42, and the bottom surface of the tapered portion 43 is fixed to the cleaning plate 42. Thus, when the cleaning plate 42 moves towards the connection hole 21, the movement direction of the cleaning plate 42 is guided by the tapered portion 43, making it easier for the cleaning plate 42 to enter the heat exchange tube 22 for cleaning.

[0041] As Figure 3 shown, since it is necessary to keep the cleaning plate 42 away from the connection hole 21 when the heat exchange tube 22 does not need to be cleaned, so that the cleaning plate 42 will not block the connection hole 21. Therefore, a limiting assembly 5 for limiting the position of the cleaning rod 41 is further provided at one end of the cleaning rod 41 away from the cleaning plate 42. The limiting assembly 5 includes a limiting plate 51 commonly connected to one end of the cleaning rod 41 and a plurality of fastening bolts 52 inserted through the limiting plate 51. The limiting plate 51 is circularly arranged, and the diameter of the limiting plate 51 is smaller than the diameter of the coil pipe. The limiting plate 51 is arranged in the header 3 away from the cleaning plate 42 and is fixed to the end of the cleaning rod 41 away from the cleaning plate 42 at the same time. The fastening bolts 52 are rotatably connected to the limiting plate 51, and the end of the fastening bolt 52 away from the limiting plate 51 is inserted into the plate tube 2 and threadedly connected to the plate tube 2. By limiting the position of the limiting plate 51, the cleaning plate 42 is always located within the connection hole 21 during the cooling process, and it is not easy to affect the process of liquid entering the connection hole 21.

[0042] In order to prevent the cleaning rod 41 from being deformed too much due to the action of gravity after long-term use, when the fastening bolt 52 is fixed to the coil pipe, the side wall of the cleaning rod 41 can be in contact with the inner wall of the heat exchange tube 22, and the heat exchange tube 22 is used to support the cleaning rod 41, making it not easy for the cleaning rod 41 to be deformed.

[0043] Since multiple cleaning blocks need to be pulled simultaneously when cleaning the heat exchange tube 22, the friction between the cleaning blocks and the heat exchange tube 22 is large, making it difficult to move the cleaning blocks. Therefore, a driving member 53 is detachably connected to the limiting plate 51 to push the limiting plate 51 away from the plate tube 2. In this embodiment, the driving member 53 is a threaded rod. The driving member 53 is passed through the limiting plate 51 and is threadedly engaged with the limiting plate 51. An abutment plate 54 is also provided at one end of the limiting plate 51 close to the plate tube 2. The surface of the abutment plate 54 is penetrated by a number of clearance holes 541 corresponding to the connection holes 21. The cleaning rod 41 is also passed through the clearance hole 541. The fastening bolt 52 is passed through the abutment plate 54 and can be threadedly engaged with the abutment plate 54, so as to limit the abutment plate 54 from abutting the limiting plate 51. The abutment plate 54 abuts against the end surface of the plate tube 2 close to the limit plate 51, and the driving member 53 passes through the limit plate 51 and abuts against the abutment plate 54, so that when the driving member 53 is rotated, the cleaning plate 42 can be driven to move in the heat exchange tube 22, and the abutment plate 54 is also used to increase the contact area between the driving member 53 and the plate tube 2, so that the plate tube 2 is not easily damaged when under stress.

[0044] In order to make the movement of the cleaning plate 42 in the heat exchange tube 22 smoother, a plurality of positioning grooves 542 are opened on the side wall of the abutting plate 54 close to the plate tube 2, and a plurality of positioning members 23 are provided on the plate tube 2. The positioning members 23 are inserted into the positioning grooves 542, thereby limiting the position of the abutting plate 54 and the plate tube 2, so that the clearance hole 541 can be aligned with the connecting hole 21, so that the coating scraped by the cleaning plate 42 can be pushed out of the heat exchange tube 22.

[0045] The working principle of this embodiment is as follows: the liquid to be cooled enters the heat exchange tube 22 from the heat exchange water inlet 31 and then flows out from the heat exchange water outlet 32, while the cooling water enters from the cooling water inlet 11 and flows out from the cooling water outlet 12, thereby cooling the liquid. When the heat exchange tube 22 needs to be cleaned, the pipe box 3 away from the cleaning block is disassembled, and then the fastening bolt 52 is rotated to disengage it from the plate tube 2. Then, the fastening bolt 52 is further rotated to disengage the abutting plate from the fastening bolt 52, and the positioning member is inserted into the positioning groove. Then, the driving member 53 is screwed on and rotated, so that the driving member 53 abuts against the abutting plate 54, and then drives the limiting plate 51 to move away from the plate tube 2, so that the cleaning block passes through the heat exchange tube 22. After cleaning is completed, the cleaning block is re-passed through the heat exchange tube 22 and the pipe box 3 is installed.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high-efficiency tube-sheet heat exchange structure for washing water in an olefin separation device, characterized in that: including, a heat exchange shell (1) with both ends open; a plate tube (2) having a plurality of connection holes (21) formed on its surface, and the plate tube (2) is respectively arranged at both ends of the heat exchange shell (1) to seal the openings of the heat exchange shell (1); heat exchange tubes (22) which are arranged between adjacent plate tubes (2) and are respectively communicated with the connection holes (21); tube boxes (3) which are respectively arranged on the sides of the plate tubes (2) away from each other, and one end of the tube box (3) close to the plate tube (2) is provided with an inner support opening and is communicated with all the connection holes (21) on the same plate tube (2); a cooling water inlet (11) and a cooling water outlet (12) are respectively arranged at positions close to the ends of the side wall of the heat exchange shell (1), the cooling water inlet (11) and the cooling water outlet (12) are far away from each other, a heat exchange water inlet (31) and a heat exchange water outlet (32) are respectively arranged on the tube box (3), and the heat exchange water inlet (31) is arranged close to the cooling water outlet (12); a cleaning assembly (4) is arranged in each of the heat exchange tubes (22), the cleaning assembly (4) includes a cleaning rod (41) passing through the heat exchange tube (22) and a cleaning plate (42) for scraping the deposits in the heat exchange tube (22), the diameter of the cleaning rod (41) is smaller than the inner diameter of the heat exchange tube (22), and the diameter of the cleaning plate (42) is equal to the inner diameter of the heat exchange tube (22).

2. The high-efficiency tube-and-plate heat exchange structure of the washing water for an olefin separation device according to claim 1, wherein: A conical portion (43) is arranged at one end of the cleaning plate (42) close to the cleaning rod (41), the bottom diameter of the conical portion (43) is equal to the diameter of the cleaning plate (42), and the vertex of the conical portion (43) is arranged at a position away from the cleaning plate (42).

3. The high-efficiency tube-and-plate heat exchange structure for washing water of an olefin separation device according to claim 1, wherein: The ends of the cleaning rods (41) away from the cleaning plates (42) are commonly connected with a limiting assembly (5) for limiting the positions of the cleaning rods (41), the limiting assembly (5) includes a limiting plate (51) connected to the cleaning rod (41) and a plurality of fastening bolts (52) passing through the limiting plate (51), the fastening bolts (52) are rotatably connected with the limiting plate (51), and the ends of the fastening bolts (52) away from the limiting plate (51) are threadedly connected with the plate tube (2).

4. The high-efficiency tube-and-plate heat exchange structure of the washing water of an olefin separation device according to claim 3, characterized in that: A driving member (53) for pushing the limiting plate (51) to move away from the plate tube (2) is detachably connected to the limiting plate (51), the driving member (53) passes through the limiting plate (51) and is in threaded cooperation with the limiting plate (51), and the driving member (53) can abut against the plate tube (2) close to the limiting plate (51).

5. The high-efficiency tube-and-plate heat exchange structure for washing water of an olefin separation device according to claim 4, wherein: An abutting plate (54) is further arranged on one side of the limiting plate (51) close to the plate tube, a plurality of through holes (541) corresponding to the connection holes (21) on the plate tube (2) respectively are formed on the surface of the abutting plate (54), the abutting plate (54) can abut against the plate tube (2), and one end of the driving member (53) close to the plate tube (2) abuts against the abutting plate (54).

6. The high-efficiency tube-and-plate heat exchange structure of the washing water of an olefin separation device according to claim 5, wherein: A number of positioning members (23) are provided on the plate tube (2), and a number of positioning grooves (542) are provided on the abutting plate (54), and the positioning members (23) can be inserted into the positioning grooves (542).

7. An efficient tube-sheet heat exchange structure for washing water of an olefin separation device according to claim 5, characterized in that: The fastening bolt (52) passes through the abutting plate (54) and is in threaded cooperation with the abutting plate (54), and the abutting plate (54) can abut on the end face of the limiting plate (51) close to the plate tube.

8. The high-efficiency tube-and-plate heat exchange structure of the washing water of an olefin separation device according to claim 3, wherein: When the fastening bolt (52) is threadedly connected to the plate tube (2), the side wall of the cleaning rod (41) abuts on the inner wall of the heat exchange tube (22).

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