Self-cleaning efficient tubular heat exchanger

Abstract

The utility model discloses a self-cleaning efficient tubular heat exchanger which comprises a heat exchanger body, a medium inlet, a medium outlet, a heat exchange inlet and a heat exchange outlet are formed in the heat exchanger body, and a plurality of heat exchange tubes are arranged in the heat exchanger body. The heat exchange inlet is connected with a cleaning fluid supply unit, the cleaning fluid supply unit is connected with a pulse generator through an electric booster pump, the pulse generator is connected with the heat exchange inlet, the pulse generator is connected with an air pump, and the heat exchange outlet is connected with the cleaning fluid supply unit through a filter unit; a spiral groove is formed in the inner wall of the heat exchange tube, and a plurality of spoilers distributed in the length direction of the heat exchange tube are further arranged on the inner wall of the heat exchange tube. According to the heat exchanger, the heat transfer efficiency can be effectively improved, the corrosion resistance of the heat exchange pipes is good, the service life can be effectively prolonged, the heat exchanger can be cleaned and maintained through online pulse cleaning, more than 90% of soft dirt can be effectively stripped, disassembly is not needed, and the production efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a self-cleaning, high-efficiency tubular heat exchanger. Background Technology

[0002] Tubular heat exchangers typically consist of components such as a shell, heat exchange tubes, tube sheet, and end caps, and are widely used in chemical, energy, and pharmaceutical industries. Traditional tubular heat exchangers use straight tubes, resulting in predominantly laminar flow with insufficient turbulence, high boundary layer thermal resistance, and low heat transfer efficiency. Furthermore, the heat exchange tubes are often made of metal (such as carbon steel), which has poor corrosion resistance, is prone to rust, and requires frequent shutdowns for cleaning, thus affecting their lifespan. In addition, traditional designs require disassembly for cleaning and maintenance, impacting production efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a self-cleaning high-efficiency tubular heat exchanger, which aims to solve the technical problems of low heat transfer efficiency, poor corrosion resistance and short life of heat exchange tubes, and the need to disassemble the machine for cleaning and maintenance, which affects production efficiency.

[0004] The technical solution of this utility model is: a self-cleaning high-efficiency tubular heat exchanger, including a heat exchanger body, a medium inlet, a medium outlet, a heat exchange inlet, and a heat exchange outlet. The heat exchanger body contains a plurality of heat exchange tubes. The heat exchange inlet is connected to a cleaning fluid supply unit, which is connected to a pulse generator via an electric booster pump. The pulse generator is connected to the heat exchange inlet and to an air pump. The heat exchange outlet is connected to the cleaning fluid supply unit via a filter unit. The inner wall of each heat exchange tube has a spiral groove, and the inner wall of each heat exchange tube also has a plurality of baffles distributed along its length.

[0005] Furthermore, the heat exchanger body described in this utility model is made of duplex stainless steel 2205 material, and the inner wall of the heat exchanger body is provided with a polytetrafluoroethylene insulation layer.

[0006] Furthermore, the heat exchange tube described in this utility model is made of titanium alloy material, and the outer surface of the heat exchange tube is provided with a nano-ceramic coating.

[0007] Furthermore, in this invention, the several turbulence-dispersing vanes inside the heat exchange tube are arranged in a V-shape with staggered patterns.

[0008] Furthermore, the cleaning fluid supply unit of this utility model includes a first cleaning fluid tank and a second cleaning fluid tank, and the first cleaning fluid tank and the second cleaning fluid tank are respectively connected to the electric booster pump through a first discharge control valve and a second discharge control valve.

[0009] Furthermore, the filtration unit of this utility model includes a first filter and a second filter. One end of the first filter is connected to the heat exchange outlet through a first liquid inlet control valve, and the other end of the first filter is connected to the first cleaning liquid tank. One end of the second filter is connected to the heat exchange outlet through a second liquid inlet control valve, and the other end of the second filter is connected to the second cleaning liquid tank.

[0010] Furthermore, in this invention, pressure sensor A and pressure sensor B are respectively provided at both ends of the first filter and the second filter.

[0011] Compared with the prior art, this utility model has the following advantages: The heat exchanger of this utility model adopts a spiral corrugated tube + turbulence fin design, which can enhance turbulence and destroy the boundary layer, thereby effectively improving the heat transfer efficiency; the heat exchange tube adopts titanium alloy tube and nano ceramic coating for double protection, which has good corrosion resistance and can effectively extend the service life; the heat exchanger can be cleaned and maintained by online pulse cleaning, which can effectively remove more than 90% of soft dirt without disassembly, ensuring production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the heat exchange tube described in this utility model.

[0014] The components include: 1. Heat exchanger body; 1a. Medium inlet; 1b. Medium outlet; 1c. Heat exchange inlet; 1d. Heat exchange outlet; 1e. Heat exchange tube; 2. Cleaning fluid supply unit; 201. First cleaning fluid tank; 202. Second cleaning fluid tank; 3. Electric booster pump; 4. Pulse generator; 5. Air pump; 6. Spiral groove; 7. Baffle plate; 8. Nano-ceramic coating; 9. First filter; 10. Second filter; 11. Pressure sensor A; 12. Pressure sensor B; a1. First outlet control valve; a2. Second outlet control valve; b1. First inlet control valve; b2. Second inlet control valve. Detailed Implementation

[0015] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Example:

[0017] The accompanying drawings illustrate a specific embodiment of the self-cleaning, high-efficiency tubular heat exchanger of this utility model. Figure 1It mainly includes a heat exchanger body 1, which is provided with a medium inlet 1a, a medium outlet 1b, a heat exchange inlet 1c, and a heat exchange outlet 1d. Several heat exchange tubes 1e are provided inside the heat exchanger body 1, and the two ends of the heat exchange tubes 1e are respectively connected to the medium inlet 1a and the medium outlet 1b.

[0018] In this embodiment, the heat exchanger body 1 is made of duplex stainless steel 2205 material, and the inner wall of the heat exchanger body 1 is provided with a polytetrafluoroethylene insulation layer to prevent electrochemical corrosion.

[0019] In this embodiment, the heat exchange tube 1e is made of titanium alloy, which is resistant to chloride ion corrosion. The outer surface of the heat exchange tube 1e is coated with a nano-ceramic coating 8, which serves to prevent hydrophobicity and scaling. Figure 2 As shown.

[0020] The heat exchange inlet 1c is connected to a cleaning fluid supply unit 2, which includes a first cleaning fluid tank 201 and a second cleaning fluid tank 202. Both tanks store an alkaline solution containing corrosion inhibitors or pure water. The first cleaning fluid tank 201 and the second cleaning fluid tank 202 are connected to an electric booster pump 3 via a first outlet control valve a1 and a second outlet control valve a2, respectively. The electric booster pump 3 is connected to a pulse generator 4, which is connected to the heat exchange inlet 1c. The pulse generator 4 is also connected to an air pump 5.

[0021] The heat exchange outlet 1d is connected to the cleaning fluid supply unit 2 via a filtration unit. The filtration unit includes a first filter 9 and a second filter 10. One end of the first filter 9 is connected to the heat exchange outlet 1d via a first inlet control valve b1, and the other end of the first filter 9 is connected to the first cleaning fluid tank 201. One end of the second filter 10 is connected to the heat exchange outlet 1d via a second inlet control valve b2, and the other end of the second filter 10 is connected to the second cleaning fluid tank 202.

[0022] In this embodiment, pressure sensor A11 and pressure sensor B12 are respectively provided at both ends of the first filter 9 and the second filter 10. The two pressure sensors are used to monitor the clogging of the filters.

[0023] Combination Figure 2 In this embodiment, a spiral groove 6 is provided on the inner wall of the heat exchange tube 1e. The pitch of the spiral groove 6 is 1.2 times the inner diameter of the heat exchange tube 1e, and the depth of the spiral groove 6 is 0.5 mm, which is used to make the fluid form a swirling turbulent flow.

[0024] The inner wall of the heat exchange tube 1e is also provided with several turbulence vanes 7 distributed along its length. The turbulence vanes 7 inside the heat exchange tube 1e are arranged in a V-shape and are used to further disperse the flow layer and improve the heat transfer effect.

[0025] This invention's heat exchanger employs a spiral corrugated tube and turbulence-disrupting fin design to enhance turbulence and disrupt the boundary layer, thereby effectively improving heat transfer efficiency. The heat exchange tubes utilize a double protection system of titanium alloy tubing and a nano-ceramic coating, offering excellent corrosion resistance and effectively extending service life. The heat exchanger can be cleaned and maintained via online pulse cleaning, effectively removing over 90% of soft fouling without disassembly, ensuring production efficiency. During cleaning, the first outlet control valve a1 and the first inlet control valve b1 are opened, while the other valves are closed. The cleaning fluid in the first cleaning fluid tank 201 is pressurized by the electric booster pump 3 and then mixed with the high-pressure air pumped by the air pump 5 by the pulse generator 4. The mixture then enters the heat exchanger body 1 through the heat exchange inlet 1c. After cleaning the heat exchanger body 1, the water carrying dirt passes through the heat exchange outlet 1d and is filtered by the first filter 9 before returning to the first cleaning fluid tank 201 for recycling. The pressure sensors A11 and B12 at both ends of the first filter 9 are used to monitor the filter blockage. If blockage is detected, the valves are switched: the first outlet control valve a1 and the first inlet control valve b1 are closed, and the second outlet control valve a2 and the second inlet control valve b2 are opened. The heat exchanger body 1 is then cleaned using the second cleaning fluid tank 202 in the same manner.

[0026] Of course, the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit and essence of the main technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A self-cleaning, high-efficiency tubular heat exchanger, characterized in that: The device includes a heat exchanger body (1), which has a medium inlet (1a), a medium outlet (1b), a heat exchange inlet (1c), and a heat exchange outlet (1d). The heat exchanger body (1) contains several heat exchange tubes (1e). The heat exchange inlet (1c) is connected to a cleaning fluid supply unit (2), which is connected to a pulse generator (4) via an electric booster pump (3). The pulse generator (4) is connected to the heat exchange inlet (1c) and to an air pump (5). The heat exchange outlet (1d) is connected to the cleaning fluid supply unit (2) via a filter unit. The inner wall of the heat exchange tube (1e) has a spiral groove (6), and the inner wall of the heat exchange tube (1e) also has several baffles (7) distributed along its length.

2. The self-cleaning high-efficiency tubular heat exchanger according to claim 1, characterized in that: The heat exchanger body (1) is made of duplex stainless steel 2205 material, and the inner wall of the heat exchanger body (1) is provided with a polytetrafluoroethylene insulation layer.

3. The self-cleaning high-efficiency tubular heat exchanger according to claim 1, characterized in that: The heat exchange tube (1e) is made of titanium alloy material, and the outer surface of the heat exchange tube (1e) is provided with a nano-ceramic coating (8).

4. The self-cleaning high-efficiency tubular heat exchanger according to claim 1, characterized in that: The several baffles (7) inside the heat exchange tube (1e) are arranged in a V-shape.

5. The self-cleaning high-efficiency tubular heat exchanger according to claim 1, characterized in that: The cleaning fluid supply unit (2) includes a first cleaning fluid tank (201) and a second cleaning fluid tank (202). The first cleaning fluid tank (201) and the second cleaning fluid tank (202) are respectively connected to the electric booster pump (3) through a first discharge control valve (a1) and a second discharge control valve (a2).

6. A self-cleaning high-efficiency tubular heat exchanger according to claim 5, characterized in that: The filtration unit includes a first filter (9) and a second filter (10). One end of the first filter (9) is connected to the heat exchange outlet (1d) through a first liquid inlet control valve (b1), and the other end of the first filter (9) is connected to the first cleaning fluid tank (201). One end of the second filter (10) is connected to the heat exchange outlet (1d) through a second liquid inlet control valve (b2), and the other end of the second filter (10) is connected to the second cleaning fluid tank (202).

7. A self-cleaning high-efficiency tubular heat exchanger according to claim 6, characterized in that: Pressure sensor A (11) and pressure sensor B (12) are respectively provided at both ends of the first filter (9) and the second filter (10).

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