Teflon shell-and-tube heat exchanger with maintenance-free structure

Abstract

The utility model discloses a Teflon shell-and-tube heat exchanger with a maintenance-free structure, and particularly relates to the technical field of heat exchangers, the Teflon shell-and-tube heat exchanger comprises a shell, flange plates are fixedly installed at the left end and the right end of the shell, and positioning pieces are fixedly installed in the shell. And long-term stable operation during corrosive medium treatment is ensured. Positioning pieces are arranged in the shell, so that accurate installation of the heat exchange pipes and efficient heat exchange of the heat exchange pipes are guaranteed, baffle plates are evenly distributed, fluid is effectively guided to flow, the heat exchange efficiency is improved, the maintenance requirement is reduced through a detachable sealing plate on the left side of the shell, the service life of the equipment is prolonged, and cleaning is convenient; the through holes guarantee smooth fluid, the seal heads seal and are connected with the tube pass tubes, multi-tube pass layout is achieved, heat exchange performance is improved, the modular design enables the heat exchange tube bundle to be replaced and cleaned easily and rapidly, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and more specifically, to a Teflon shell-and-tube heat exchanger with a maintenance-free structure. Background Technology

[0002] Shell-and-tube heat exchangers are widely used heat exchange equipment in chemical, pharmaceutical, and food processing industries. Their core function is to facilitate the effective transfer of heat between two fluids.

[0003] A search revealed that patent publication number CN206944769U discloses a shell-and-tube heat exchanger, comprising a shell, a first tube box, a second tube box, a first tube sheet, and a second tube sheet, wherein the shell is disposed between the first and second tube sheets. This shell-and-tube heat exchanger increases the contact area between high-temperature gas and the heat exchange tube bundle, resulting in more heat transfer and thus improving the heating time and temperature of low-temperature gas; it also ensures uniform heat exchange.

[0004] Currently, Teflon shell-and-tube heat exchangers still face problems such as complex design and high maintenance challenges, especially in their shell-and-tube joints and sealing structures, which often require frequent inspection and replacement of seals, hindering the continuous and stable operation of the equipment.

[0005] Therefore, a Teflon shell-and-tube heat exchanger with a maintenance-free structure is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a Teflon shell-and-tube heat exchanger with a maintenance-free structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a Teflon shell-and-tube heat exchanger with a maintenance-free structure, comprising a shell, flanges fixedly installed at both ends of the shell, positioning plates fixedly installed inside the shell, heat exchange tubes fixedly connected to the opposite sides of the positioning plates, baffles installed inside the shell, a sealing plate detachably installed on the left side of the shell, through holes evenly provided on the upper side of the sealing plate, and end caps respectively provided on the left and right sides of the shell, with a first tube connected to the bottom of the left end cap and a second tube connected to the top of the right end cap.

[0008] Preferably, the baffles are arranged at equal intervals or staggered.

[0009] Preferably, a spacer plate is fixed to the opposite side of the positioning plate, and two spacer plates are provided, each of which passes through a baffle plate.

[0010] Preferably, a threaded hole is provided at the position where the end cap coincides with the flange, and a fixing bolt is engaged inside the threaded hole.

[0011] Preferably, a first shell-side tube is connected to the bottom left end of the housing, and a second shell-side tube is fixedly installed on the top of the housing.

[0012] Preferably, a support base is fixedly installed at the bottom of the housing, a base plate is provided at the bottom of the support base, and a suspension seat is fixedly installed at the top of the housing.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] Compared with existing technologies, this Teflon shell-and-tube heat exchanger with a maintenance-free structure ensures long-term stable operation when handling corrosive media through its ingenious shell construction and Teflon cladding. The left and right ends are securely connected to other equipment via flanges, facilitating installation and disassembly. Internal positioning plates ensure accurate installation of the heat exchange tubes, enabling efficient heat exchange. Uniformly distributed baffles effectively guide fluid flow, improving heat exchange efficiency.

[0015] Compared with existing technologies, this Teflon shell-and-tube heat exchanger with a maintenance-free structure reduces maintenance requirements, extends equipment life, and facilitates cleaning through a removable sealing plate on the left side of the shell. The through holes ensure smooth fluid flow, and the end caps both seal and connect the tubes, enabling a multi-pass layout and improving heat exchange performance. The modular design makes the replacement and cleaning of the heat exchange tube bundle simple and quick, reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the front view of the housing of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the housing of this utility model.

[0019] The attached figures are labeled as follows: 1. Shell; 2. Flange; 3. Positioning plate; 4. Heat exchange tube; 5. Baffle; 6. Spacing plate; 7. Sealing plate; 8. Through hole; 9. End cap; 10. First tube side; 11. Second tube side; 12. First shell side; 13. Second shell side; 14. Support base; 15. Suspension base. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] As attached Figures 1 to 3 The Teflon shell-and-tube heat exchanger shown includes a shell 1, flanges 2 fixedly installed at both ends of the shell 1, positioning plates 3 fixedly installed inside the shell 1, heat exchange tubes 4 fixedly connected to the opposite side of the positioning plates 3, baffles 5 installed inside the shell 1, a sealing plate 7 detachably installed on the left side of the shell 1, through holes 8 evenly opened on the upper side of the sealing plate 7, and end caps 9 respectively provided on the left and right sides of the shell 1. The bottom of the left end cap 9 is connected to a first tube 10, and the top of the right end cap 9 is connected to a second tube 11.

[0023] Among them: the shell 1 has an ingenious structure, and the outer surface is made of Teflon material, which ensures the long-term stable operation of the equipment when handling corrosive media. The flanges 2 at both ends of the shell 1 enable a firm connection with other equipment, which is convenient for installation and disassembly. Positioning plates 3 are set inside the shell 1 to ensure the accurate installation of heat exchange tubes 4. Heat exchange tubes 4 are responsible for efficient heat exchange. Baffles 5 are evenly distributed inside the shell 1 to effectively guide fluid flow and improve heat exchange efficiency.

[0024] In addition, the removable sealing plate 7 on the left side of the shell 1 greatly reduces maintenance needs, extends the service life of the equipment, and facilitates maintenance and cleaning. The evenly spaced through holes 8 on it ensure smooth fluid flow. The end caps 9 on the left and right sides not only serve a sealing function but also connect the first tube 10 and the second tube 11, realizing a flexible multi-pass layout and further improving the heat exchange performance of the equipment. The modular design of this equipment makes it simple and quick to replace or clean the heat exchange tube bundle 4, reducing maintenance costs.

[0025] Example 2

[0026] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 3 As shown below, see details:

[0027] In a preferred embodiment, the baffles 5 are arranged at equal intervals or in a staggered manner. Furthermore, by arranging the baffles 5 at equal intervals inside the housing 1, the fluid is ensured to experience uniform resistance during flow, thereby improving heat exchange efficiency. At the same time, the staggered arrangement of the baffles 5 can more effectively change the fluid flow direction, increase the contact area between the fluid and the heat exchange tube 4, further enhance the heat exchange effect, and make the overall performance of the equipment more superior.

[0028] In a preferred embodiment, a spacer plate 6 is fixedly connected to the opposite side of the positioning plate 3. Two spacer plates 6 are provided, and each spacer plate 6 passes through the baffle plate 5. Furthermore, two spacer plates 6 are fixedly connected to the opposite side of the positioning plate 3. These two spacer plates 6 firmly pass through all the baffle plates 5. The spacer plates 6 not only fix the position of the baffle plates 5, but also ensure that the spacing between the baffle plates 5 is consistent, thereby optimizing the flow path of the fluid in the shell 1 and further improving the heat exchange efficiency and the overall performance of the equipment.

[0029] In a preferred embodiment, a threaded hole is provided at the overlapping position of the end cap 9 and the flange 2, and a fixing bolt is engaged inside the threaded hole; furthermore, the threaded hole at the overlapping position of the end cap 9 and the flange 2 is designed to perfectly engage with the fixing bolt, thereby achieving a tight and firm connection between the end cap 9 and the flange 2, which not only enhances the overall structural strength of the equipment, but also ensures the stability and safety of the equipment during operation.

[0030] In a preferred embodiment, a first shell-side tube 12 is connected to the bottom left end of the housing 1, and a second shell-side tube 13 is fixedly installed on the top of the housing 1. Furthermore, the design of the housing 1 is further improved, with a first shell-side tube 12 added to the bottom left end to provide an input or output channel for the fluid inside the housing 1. At the same time, a second shell-side tube 13 is fixedly installed on the top of the housing 1 as another important fluid channel, which works in conjunction with the first shell-side tube 12 to achieve flexible management and efficient heat exchange of the fluid inside the housing 1.

[0031] In a preferred embodiment, a support base 14 is fixedly installed at the bottom of the housing 1, and a base plate is provided at the bottom of the support base 14. A suspension seat 15 is fixedly installed at the top of the housing 1. Furthermore, the support base 14 is firmly fixedly installed at the bottom of the housing 1, which enhances the stability of the equipment. The base plate at the bottom of the support base 14 further expands the support area of ​​the equipment, making it more stable. At the same time, the suspension seat 15 is also fixedly installed at the top of the housing 1, which facilitates the hoisting and movement of the equipment, making the installation and disassembly process of the equipment easier and faster.

[0032] The working process of this utility model is as follows: Before use, it is necessary to confirm that the instruments and safety accessories are complete, sensitive, and accurate; the foundation and base are stable and without abnormalities; the connecting bolts are tight and free of rust; and the pipes, fittings, valves, and pipe racks are firmly installed and clearly marked. During operation, first open the low-temperature water vent valve, then slowly open the low-temperature water outlet valve to release air, then close the vent valve, and then slowly open the low-temperature water inlet valve until normal operation. Similarly, perform the same operation on the high-temperature water system. When shutting down and cooling, first close the high-temperature water outlet valve, and after the temperature drops to the low-temperature water temperature, close the inlet valve; then close the low-temperature water outlet valve, and after the temperature drops to room temperature, close the inlet valve. In case of emergency shutdown, first close the high-temperature water inlet and outlet valves, open the pressure relief valve and vent valve until the pressure is zero; then perform the same operation on the low-temperature water system.

Claims

1. A shell and tube heat exchanger of the type having a maintenance free construction comprising a shell (1) characterised in that: The flange plate (2) is fixedly installed at the left and right ends of the shell (1), the positioning sheet (3) is fixedly installed inside the shell (1), the heat exchange pipes (4) are fixedly connected to the opposite sides of the positioning sheet (3), the baffle plates (5) are installed inside the shell (1), the seal plates (7) are detachably installed at the left side of the shell (1), the through holes (8) are uniformly formed in the upper side of the seal plates (7), the end covers (9) are arranged at the left and right sides of the shell (1), the first tube-pass pipes (10) are connected to the bottom of the left end cover (9), and the second tube-pass pipes (11) are connected to the top of the right end cover (9). The opposite sides of the positioning sheet (3) are fixedly connected with the distance plates (6), the distance plates (6) are provided with two, and the distance plates (6) penetrate the baffle plates (5) respectively.

2. A maintenance-free shell-and-tube heat exchanger according to claim 1, characterized in that: The baffle plates (5) are arranged at equal distances, and the baffle plates (5) are arranged in a staggered mode.

3. A maintenance-free shell-and-tube heat exchanger according to claim 2, characterized in that: Threaded holes are formed in the coinciding positions of the end cover (9) and the flange plate (2), and the fixing bolts are engaged in the threaded holes.

4. A maintenance-free shell-and-tube heat exchanger according to claim 3, characterized in that: The first shell-pass pipes (12) are connected to the bottom left end of the shell (1), and the second shell-pass pipes (13) are fixedly installed at the top of the shell (1).

5. A maintenance-free shell and tube heat exchanger according to claim 4, wherein: The support seats (14) are fixedly installed at the bottom of the shell (1), the base plates are arranged at the bottom of the support seats (14), and the suspension seats (15) are fixedly installed at the top of the shell (1).

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