High-temperature-resistant anti-corrosion Teflon heat exchanger

Abstract

The utility model discloses a high-temperature-resistant anti-corrosion teflon heat exchanger which comprises a shell and a plurality of sets of supporting frames arranged at the lower end of the outer side of the shell. Tube plates are arranged at the two ends of the shell, a plurality of tube bundles are connected between the tube plates, and through holes communicated with the tube bundles are formed in the tube plates. A right sealing cylinder is arranged on the right side of the shell; sealing installation assemblies are arranged between the left sealing cylinder and the shell and between the right sealing cylinder and the shell and comprise flanges arranged on the side faces, close to the shell, of the left sealing cylinder and the right sealing cylinder, and the flanges are connected with the corresponding tube plates. Gaskets are arranged between the flanges and the corresponding tube plates; a lubricating assembly is arranged in the shell. According to the utility model, the gasket which is made of fluororubber and is large in springback amount is adopted, so that the tube plate can be compensated, obvious gaps are not easy to form after the tube plate is thermally expanded and deformed, and the liquid leakage condition is avoided; the lubricating assembly is arranged in the shell, lubricating oil can be guided to the inner side of the lining layer, damage caused by friction with the tube bundle is further reduced, and the tube bundle and the shell can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a high-temperature resistant and corrosion-proof Teflon heat exchanger. Background Art

[0002] Teflon heat exchangers are widely used in many fields, including chemical industry, petroleum, electric power, pharmaceutical and other industries, and have excellent corrosion resistance, chemical stability and high-temperature resistance. Teflon heat exchangers are made of polytetrafluoroethylene material, have high thermal conductivity and heat exchange capacity, and can effectively transfer heat and improve energy efficiency.

[0003] One of the advantages of Teflon heat exchangers is their excellent corrosion resistance. This material has good chemical stability, can withstand many strong acids, strong alkalis and harsh environmental conditions, will not react with acids, alkalis and other chemical substances, and will not be eroded by water or steam. In addition, Teflon heat exchangers also have good high-temperature resistance, can work in high-temperature environments, and maintain high heat transfer efficiency.

[0004] In practical applications, the Teflon material has a high coefficient of thermal expansion. After long-term use, the thermal expansion elongation of the heat exchange tube bundle will cause the heat exchange tube bundle to sag and contact the shell, resulting in frictional damage; in addition, when the tube sheet is heated, the thermal expansion in its axial direction is restricted by the connecting bolts between the tube sheet flange and the head, causing the tube sheet thermal expansion to develop rapidly along the radial direction. Due to the poor fluidity of the Teflon material, the tube sheet cannot be compensated in the axial direction due to temperature changes, resulting in liquid leakage at the seal; in addition, one of the characteristics of fluoroplastics is that they have no resilience, so the locking force of the connecting bolts will cause permanent and irreversible deformation of the contact surface between the tube sheet and the connecting flange. Sometimes, just disassembling once may cause liquid leakage at this place when it is reused. The above problems have not been improved and solved in the prior art, and there is room for improvement. Summary of the Utility Model

[0005] In the prior art described above, the polytetrafluoroethylene material has a relatively high coefficient of friction. Therefore, if no additional lubrication and maintenance work is carried out during long-term use, the Teflon heat exchanger cannot operate normally. The utility model aims to provide a high-temperature resistant and corrosion-proof Teflon heat exchanger to solve this technical problem.

[0006] To solve the above technical problems, the technical solution provided by the utility model is: a high-temperature resistant and corrosion-proof Teflon heat exchanger, including a shell and a plurality of groups of support frames provided at the lower end of the outer side of the shell; both ends of the shell are provided with tube sheets, a plurality of tube bundles are connected between the tube sheets, and through holes communicating with the tube bundles are provided on the tube sheets; a left sealing cylinder is provided on the left side of the shell, and a right sealing cylinder is provided on the right side;

[0007] A sealing and mounting assembly is provided between the left envelope, the right envelope and the housing. The sealing and mounting assembly includes flanges provided on the sides of the left envelope and the right envelope close to the housing, and the flanges are connected to the corresponding tube sheets; gaskets are provided between the flanges and the corresponding tube sheets.

[0008] A lubricating assembly is provided inside the housing. The lubricating assembly includes an intermediate layer provided on the inner side of the housing, and a lining layer is provided on the inner side of the intermediate layer; a plurality of annular oil grooves are provided on the outer side of the intermediate layer, and a plurality of diversion holes are provided between adjacent oil grooves. Diversion holes II capable of penetrating the lining layer are provided at the lower ends of the oil grooves.

[0009] Further, a plurality of assembly holes are provided along the circumference on the flanges, and assembly holes II corresponding to the assembly holes are provided on the tube sheets. The assembly holes and the assembly holes II are detachably connected by bolts and nuts.

[0010] Further, the gasket is made of fluororubber.

[0011] Further, the tube sheets and the housing are fixedly connected.

[0012] Further, the lining layer is made of rubber and is adhesively bonded to the intermediate layer.

[0013] Further, a plurality of oil inlets are communicated with the housing. The oil inlets are respectively communicated with one of the oil grooves. A guide oil pipe is jointly connected to the upper ends of the oil inlets, and an oil guide port is provided on the guide oil pipe.

[0014] The advantages of the present utility model compared with the prior art are as follows:

[0015] The gasket made of fluororubber with a large amount of resilience can compensate for the tube sheet, so that obvious gaps are not easily formed after thermal expansion and deformation, thus avoiding liquid leakage. With an appropriate bolt tightening amount, the deformation of the contact surface between the tube sheet and the gasket can be compensated by the resilience of the gasket.

[0016] A lining layer is provided on the inner side of the housing, which can reduce the hard friction between the tube bundle and the housing caused by the sagging of the tube bundle after thermal expansion, reduce damage, and also avoid damage to the inner side of the housing caused by accidental liquid leakage of the tube bundle.

[0017] A lubricating assembly is provided inside the housing, which can divert the lubricating oil to the inner side of the lining layer, further reduce the damage caused by friction with the tube bundle, and protect the tube bundle and the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is a schematic diagram of the internal structure of the present utility model.

[0020] Figure 3 This is a schematic diagram of the washer structure of the present utility model.

[0021] Figure 4 This is a schematic diagram of the cross-section of the housing of the present utility model.

[0022] Figure 5 This is a schematic diagram of a partial structure of the lubrication assembly of the present utility model.

[0023] Figure 6 This is the present utility model Figure 5 The enlarged view at position A.

[0024] As shown in the figure: 1. Housing, 2. Support frame, 3. Tube sheet, 4. Tube bundle, 5. Through hole, 6. Left sealing cylinder, 7. Right sealing cylinder, 8. Flange, 9. Bolt, 10. Nut, 11. Washer, 12. Intermediate layer, 13. Inner lining layer, 14. Oil groove, 15. Flow guiding hole, 16. Second flow guiding hole, 17. Oil inlet, 18. Oil guiding pipe, 19. Oil guiding port. Specific implementation manner

[0025] The following further elaborates on the present utility model with reference to the accompanying drawings.

[0026] Example 1, in combination with the attached Figure 1 , a high-temperature resistant and corrosion-proof Teflon heat exchanger, including a housing 1 and several groups of support frames 2 provided at the lower end of the outer side of the housing 1; tube sheets 3 are provided at both ends of the housing 1, and the tube sheets 3 are fixedly connected to the housing 1.

[0027] In combination with the attached Figure 1 , 2 , several tube bundles 4 are connected between the tube sheets 3, and through holes 5 communicating with the tube bundles 4 are provided on the tube sheets 3; a left sealing cylinder 6 is provided on the left side of the housing 1, and a right sealing cylinder 7 is provided on the right side; several sealing plates for fixing the tube bundles 4 are also provided in the housing 1 to make it stable and not easy to sag.

[0028] In combination with the attached Figure 1 , 2 , 3, 4, sealing installation components are provided between the left sealing cylinder 6, the right sealing cylinder 7 and the housing 1. The sealing installation components include flanges 8 provided on the sides of the left sealing cylinder 6 and the right sealing cylinder 7 close to the housing 1, and the flanges 8 are respectively connected to the corresponding tube sheets 3; a washer 11 is provided between the flange 8 and the corresponding tube sheet 3, and the washer 11 is made of fluororubber; the fluororubber material has a large amount of resilience. Since the tube sheet 3 itself has no resilience, after being tightened by bolts, it is extruded and deformed, and comes into hard contact with the flange 8, which is very likely to generate gaps. The washer 11 can compensate for this deformation, improve the sealing performance, and avoid liquid leakage in the later stage.

[0029] In combination with the attached Figure 1 , 2, a number of assembly holes are provided along the circumference on the flange 8, and assembly holes II corresponding to the assembly holes are provided on the tube sheet 3. The assembly holes and the assembly holes II are detachably connected by bolts 9 and nuts 10.

[0030] Embodiment 2, in combination with the attached Figure 1 , 2 , 5, and 6, a lubrication assembly is provided inside the housing 1. The lubrication assembly includes an intermediate layer 12 provided inside the housing 1. An inner lining layer 13 is provided inside the intermediate layer 12. The inner lining layer 13 is made of rubber and is adhesively bonded to the intermediate layer 12. The inner lining layer 13 plays a protective role on the inner side of the housing 1. When the tube bundle 4 leaks liquid accidentally, it can prevent direct erosion of the inner side of the housing 1.

[0031] In combination with the attached Figure 4 , 5 , a number of annular oil grooves 14 are provided outside the intermediate layer 12. A number of diversion holes 15 are provided between adjacent oil grooves 14. Diversion holes II 16 that can penetrate the inner lining layer 13 are provided at the lower ends of the oil grooves 14.

[0032] In combination with the attached Figure 4 , 5 , a number of oil inlets 17 are communicated and provided on the housing 1. The oil inlets 17 are respectively communicated with one of the oil grooves 14. A guide oil pipe 18 is commonly connected to the upper ends of the oil inlets 17. A guide oil port 19 is provided on the guide oil pipe 18.

[0033] In the above embodiment, lubricating oil is added into the oil inlets 17 through the guide oil port 19 and the guide oil pipe 18, and then enters a number of oil grooves 14. The adjacent oil grooves 14 are diverted through the diversion holes 15, and the diversion holes II 16 can divert the lubricating oil to the inner side of the inner lining layer 13, further reducing the hard friction with the tube bundle 4.

[0034] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present invention.

Claims

1. A high temperature resistant and corrosion resistant Teflon heat exchanger, comprising a shell (1) and a plurality of support frames (2) provided at the lower end of the outer side of the shell (1); characterized in that: Both ends of the shell (1) are provided with tube sheets (3), a plurality of tube bundles (4) are connected between the tube sheets (3), and the tube sheets (3) are provided with through holes (5) communicating with the tube bundles (4); a left sealing cylinder (6) is provided on the left side of the shell (1), and a right sealing cylinder (7) is provided on the right side; A sealing installation assembly is provided between the left sealing cylinder (6), the right sealing cylinder (7) and the shell (1), and the sealing installation assembly comprises a flange (8) provided on the side of the left sealing cylinder (6) and the right sealing cylinder (7) close to the shell (1), and the flange (8) is connected to the corresponding tube sheet (3); a gasket (11) is provided between the flange (8) and the corresponding tube sheet (3); A lubrication assembly is provided in the shell (1), and the lubrication assembly comprises an intermediate layer (12) provided on the inner side of the shell (1), and an inner lining layer (13) is provided on the inner side of the intermediate layer (12); a plurality of annular oil grooves (14) are provided on the outer side of the intermediate layer (12), a plurality of guide holes (15) are provided between adjacent oil grooves (14), and a second guide hole (16) capable of penetrating the inner lining layer (13) is provided at the lower end of each oil groove (14).

2. The high temperature resistant and corrosion resistant Teflon heat exchanger according to claim 1, characterized in that: The flange (8) is provided with a plurality of assembly holes along the circumferential direction, and the tube plate (3) is provided with a second assembly hole corresponding to the assembly hole. The assembly hole and the second assembly hole are detachably connected via bolts (9) and nuts (10).

3. The high temperature resistant and corrosion resistant Teflon heat exchanger according to claim 1, characterized in that: The gasket (11) is made of fluororubber.

4. The high temperature resistant and corrosion resistant Teflon heat exchanger according to claim 1, characterized in that: The tube sheet (3) and the shell (1) are fixedly connected.

5. The high temperature resistant and corrosion resistant Teflon heat exchanger according to claim 1, characterized in that: The inner lining layer (13) is made of rubber material and is bonded to the middle layer (12) by gluing.

6. The high temperature resistant and corrosion resistant Teflon heat exchanger according to claim 1, characterized in that: The housing (1) is provided with a plurality of oil inlets (17), each of which is connected to one of the oil grooves (14). The upper ends of the oil inlets (17) are connected to an oil guide pipe (18), and the oil guide pipe (18) is provided with an oil guide port (19) on the upper side.

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