Modularized anti-blocking shell-and-tube heat exchanger

Abstract

The utility model discloses a modularized anti-blocking shell-and-tube heat exchanger. The modularized anti-blocking shell-and-tube heat exchanger comprises a heat exchange module, a water chamber, a supporting structure and a connection unit. The heat exchange module comprises a shell, a shell pass inlet, a shell pass outlet, a heat exchange tube, a tube plate and a shell pass baffle plate; the water chamber comprises a connection water chamber, a water inlet and outlet chamber, a tube pass inlet, a tube pass outlet, a first drain outlet, a first middle partition plate and a third drain outlet. The supporting structure comprises a base; the communication unit comprises a shell pass connecting pipe, a tube pass connecting pipe, a middle partition plate II and a sewage draining exit; the heat exchange tube is shorter, and the influence of a fluid boundary layer in the tube is weakened; the modular structural design is adopted, so that the maintenance, replacement and scale removal processes are more convenient; and the combination number and the connection mode of the heat exchange modules can be flexibly and optimally designed according to the actual heat use requirement of a user, and the user experience is better.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a modular anti-clogging shell-and-tube heat exchanger. Background Technology

[0002] In industrial production, heat exchangers are among the most commonly used process equipment, widely applied in industries such as metallurgy, petrochemicals, power, and building materials. The design and commissioning of heat exchangers greatly promote the efficient operation of production processes. Depending on the type of process medium involved in heat exchange and the differences in production process requirements, there are many types and forms of heat exchangers, the most common being shell-and-tube, plate, gas-liquid, gas-to-gas, and finned tube types. Different application scenarios require different heat exchanger types. However, in some wastewater heat exchange environments, scaling and clogging of heat exchangers has always been a difficult problem hindering the technological development of this industry. For example, condensers in power plants, wastewater heat exchangers in oil fields, and evaporators in wastewater source heat pumps have consistently experienced clogging. This not only affects the heat exchange efficiency of the equipment but also necessitates regular shutdowns for scaling removal, resulting in substantial losses in revenue and corresponding maintenance costs, severely damaging the production and operation of enterprises and the revenue generated from energy-saving projects. In response to this situation, many experts and companies have conducted extensive research and practice. Currently, the main descaling technologies in the industry include mechanical descaling, chemical descaling, physical descaling, and biological descaling. Different descaling technologies vary greatly in application scenarios, descaling effects, and technical reliability, and most require investment of manpower and resources to implement, resulting in high operating costs. Therefore, it is necessary to propose a modular anti-clogging shell-and-tube heat exchanger to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a modular anti-clogging shell-and-tube heat exchanger to solve the problem of scaling and clogging in existing equipment, which affects the heat exchange efficiency of the equipment.

[0004] This utility model provides a modular anti-clogging shell-and-tube heat exchanger, comprising: a heat exchange module, a water chamber, a support structure, and a connecting unit; the heat exchange module includes a shell, a shell-side inlet, a shell-side outlet, heat exchange tubes, a tube sheet, and a shell-side baffle plate; the water chamber includes a connecting water chamber, an inlet / outlet water chamber, a tube-side inlet, a tube-side outlet, a first drain outlet, a first intermediate partition, and a third drain outlet; the support structure includes a base; the connecting unit includes a shell-side connecting pipe, a tube-side connecting pipe, a second intermediate partition, and a drain outlet;

[0005] The heat exchange tubes are inserted into the tube holes of the tube sheet and fixed together. The tube sheet is fixed together with the two ends of the shell. The shell is provided with several shell-side baffles. The top of the shell has shell-side inlets and outlets on both sides of the shell-side baffles. The tube sheet is fixedly connected to the inlet / outlet water chamber, the connecting water chamber, and the tube-side connecting pipe. The tubes of the two heat exchange modules are connected together through the tube-side connecting pipe, and the shells of the two heat exchange modules are connected together through the shell-side connecting pipe. One port of the shell-side connecting pipe is connected to the shell-side inlet of the first heat exchange module, and the other port is connected to the shell-side outlet of the second heat exchange module. The inlet / outlet water chamber is provided with a middle partition plate. The ends of the inlet / outlet water chamber are provided with tube-side inlets and outlets on both sides of the middle partition plate. The lower part of the inlet / outlet water chamber is provided with a drain outlet on each side of the middle partition plate. The tube-side connecting pipe is provided with a middle partition plate. The lower part of the tube-side connecting pipe is provided with a drain outlet on each side of the middle partition plate. The connecting water chamber is provided with a drain outlet.

[0006] Furthermore, the heat exchange tube is a scaled tube or a straight tube with a self-cleaning function.

[0007] Furthermore, electric isolation valves are installed on the pipelines connected to sewage outlets 1, 2, and 3.

[0008] Furthermore, online pressure detectors are installed in the inlet and outlet water chambers, the connecting water chambers, and the pipes connecting the pipeline.

[0009] Furthermore, an air vent with isolation function is provided at the bottom of the housing.

[0010] Furthermore, an isolation valve is installed on the shell-side connecting pipe.

[0011] Furthermore, the outer walls of the tube-side connecting pipe and the shell-side connecting pipe are designed with a corrugated structure.

[0012] Furthermore, the two ends of the heat exchange tube are fixed to the tube sheet by welding or expansion, and the tube sheet is welded and fixed to the two ends of the shell.

[0013] Furthermore, the tube sheet is provided with flange holes on its outer periphery, and is fixedly connected to the inlet and outlet water chambers, the connecting water chamber and the tube-side connecting pipe through the flanges respectively.

[0014] This utility model has the following beneficial effects: The modular anti-clogging shell-and-tube heat exchanger provided by this utility model is based on the conventional shell-and-tube heat exchanger and adopts a segmented modular structure design. On the one hand, it reduces the deposition rate of dirt in the fluid boundary layer inside the tube and reduces the risk of scaling and clogging inside the tube. On the other hand, it is equipped with a drainage structure to reduce the concentration of dirt in the water through regular drainage. At the same time, the operating resistance of each module is monitored in real time. When scaling or clogging occurs in a module, the module can be easily inspected and replaced, which significantly improves the efficiency of equipment maintenance. Thus, it effectively ensures the cleanliness of the heat exchange tube wall, improves heat exchange efficiency, and extends the service life of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is the main view of the modular anti-clogging shell-and-tube heat exchanger of this utility model;

[0017] Figure 2 This is a top view of the modular anti-clogging shell-and-tube heat exchanger of this utility model;

[0018] Figure 3 This is a side view of the modular anti-clogging shell-and-tube heat exchanger of this utility model;

[0019] Figure 4 yes Figure 2 BB view;

[0020] Figure 5 yes Figure 2 CC view;

[0021] Figure 6 yes Figure 2 AA view;

[0022] Figure 7 This is a three-dimensional structural view of the modular anti-clogging shell-and-tube heat exchanger of this utility model.

[0023] Diagram description: Connecting water chamber-1; Shell-side inlet-2; Shell-side outlet-3; Shell-side connecting pipe-4; Tube-side connecting pipe-5; Shell-6; Inlet / outlet water chamber-7; Drain outlet 1-8; Base-9; Drain outlet 2-10; Drain outlet 3-11; Tube-side inlet-12; Tube-side outlet-13; Heat exchange tube-14; Intermediate partition 2-15; Tube sheet-16; Shell-side baffle-17; Intermediate partition 1-18. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] Please see Figures 1 to 7 This utility model provides a modular anti-clogging shell-and-tube heat exchanger, which mainly consists of a heat exchange module, a water chamber, a support structure, and a connecting unit. The heat exchange module mainly includes a shell 6, a shell-side inlet 2, a shell-side outlet 3, heat exchange tubes 14, a tube sheet 16, and a shell-side baffle 17. The water chamber mainly includes a connecting water chamber 1, an inlet / outlet water chamber 7, a tube-side inlet 12, a tube-side outlet 13, a drain port 8, an intermediate partition 18, and a drain port 31. The support structure mainly includes a base 9. The connecting unit mainly includes a shell-side connecting pipe 4, a tube-side connecting pipe 5, an intermediate partition 2 15, and a drain port 10.

[0026] Both ends of the heat exchange tube 14 are inserted into the tube holes of the tube sheet 16 and fixed to the tube sheet 16 by welding or expansion. The tube sheet 16 is welded and fixed to both ends of the shell 6. The shell 6 is provided with several shell-side baffles 17, which are used to support and fix the heat exchange tube 14 and guide the flow of the medium in the shell side. The top of the shell 6 has shell-side inlet 2 and shell-side outlet 3 on both sides of the shell-side baffles 17. The tube sheet 16 has flange holes on its outer periphery, which are fixed to the inlet / outlet water chamber 7, the connecting water chamber 1, and the tube-side connecting pipe 5 respectively. The tube sides of the two heat exchange modules are connected together by the tube-side connecting pipe 5, and the shell sides of the two heat exchange modules are connected together by the shell-side connecting pipe 4. One port of the shell-side connecting pipe 4 is connected to the shell-side inlet 2 of the first heat exchange module, and the other port is connected to the shell-side outlet 2 of the first heat exchange module. The port is connected to the shell-side outlet 3 of the second heat exchange module; a base 9 is provided directly below the shell 6 to support and fix the entire heat exchanger; a middle partition 18 is provided in the middle of the inlet and outlet water chamber 7 to isolate the medium flowing into and out of the tube side; a tube side inlet 12 and a tube side outlet 13 are respectively opened on both sides of the middle partition 18 at the end of the inlet and outlet water chamber 7; a drain port 8 is opened on both sides of the middle partition 18 at the bottom of the inlet and outlet water chamber 7 to periodically discharge the dirt deposited in the inlet and outlet water chamber 7; a middle partition 2 15 is provided inside the tube side connecting pipe 5; a drain port 2 10 is opened on both sides of the middle partition 2 at the bottom of the tube side connecting pipe 5 to periodically discharge the dirt deposited in the tube side connecting pipe 5; a drain port 3 11 is provided directly below the connecting water chamber 1 to periodically discharge the dirt deposited in the connecting water chamber 1.

[0027] Preferably, the heat exchange tube 14 is a scaled tube or a straight tube with a self-cleaning function to better achieve the goal of cleaning inside the tube.

[0028] Preferably, an electric isolation valve is installed on the pipeline connected to the first drain outlet 8, the second drain outlet 10, and the third drain outlet 11 to facilitate regular sewage discharge operations.

[0029] Preferably, online pressure detectors are installed in the inlet / outlet water chamber 7, the connecting water chamber 1, and the tube-side connecting pipe 5 to monitor the tube-side operating resistance of each heat exchange module in real time, so as to grasp the operating status of the equipment in real time and provide optimized guidance for sewage discharge operation.

[0030] Preferably, a vent with isolation function is provided at the bottom of the shell 6 to facilitate the venting or reuse of the shell-side medium during equipment maintenance;

[0031] Preferably, an isolation valve is provided on the shell-side connecting pipe 4 for isolation between a heat exchange module and a normal heat exchange module when a certain heat exchange module is under maintenance due to a fault.

[0032] Preferably, the outer walls of the tube-side connecting pipe 5 and the shell-side connecting pipe 4 are designed with a corrugated structure, which can better adapt to the deformation characteristics of the heat exchanger under different thermal stress conditions.

[0033] All components are connected by flanges, which facilitates the assembly, disassembly, inspection and maintenance of the entire equipment. At the same time, the number of heat exchange modules and the series-parallel connection method can be optimized according to the actual situation of the project.

[0034] The working principle of the modular anti-clogging shell-and-tube heat exchanger provided in this embodiment is as follows: Wastewater enters the inlet / outlet water chamber 7 through the tube-side inlet 12. Under the distribution action of the intermediate partition 18 and tube sheet 16, the wastewater enters the heat exchange tube 14 on one side of the first heat exchange module, where it exchanges heat with the shell-side medium. Then, the wastewater flows out of the heat exchange tube 14 of the first heat exchange module and enters the tube-side connecting pipe 5. Under the distribution action of the intermediate partition 15 and tube sheet 16, the wastewater enters the heat exchange tube 14 on one side of the second heat exchange module, where it exchanges heat with the shell-side medium. Then, the wastewater flows out of the heat exchange tube 14 of the second heat exchange module and enters the connecting water chamber 1. Under the distribution action of the tube sheet 16, the wastewater enters the heat exchange tube 14 on the other side of the second heat exchange module, where it exchanges heat with the shell-side medium. Then, the wastewater flows out of the second heat exchange module and enters the other side of the tube-side connecting pipe 5. Under the distribution effect, sewage enters the heat exchange tube 14 on the other side of the first heat exchange module, where it exchanges heat with the shell-side medium. Afterward, the sewage flows out of the heat exchange tube 14 of the first heat exchange module and enters the inlet / outlet water chamber 7, and is discharged from the heat exchanger through the tube-side outlet 13. The clean medium enters the shell side of the heat exchanger through the shell-side inlet 2, laterally scouring the outer wall of the heat exchange tube 14, and changes direction under the guidance of the shell-side baffle 17, exchanging heat with the sewage in the tubes of the second heat exchange module. Then, the clean medium enters the shell side of the first heat exchange module through the shell-side connecting pipe 4 and the shell-side inlet 2 of the first heat exchange module, laterally scouring the outer wall of the heat exchange tube 14, and changes direction under the guidance of the shell-side baffle 17, exchanging heat with the sewage in the tubes of the first heat exchange module, and is then discharged through the shell-side outlet 3 of the first heat exchange module. This completes the heat exchange process between sewage and clean medium.

[0035] During the heat exchange process, the heat transfer effect on the shell side can be enhanced to a certain extent by the guiding effect of the shell-side baffle 17. At the same time, the cleanliness status inside the heat exchange tubes can be monitored in real time by the online pressure detector on the wastewater side. When the operating resistance of a certain module exceeds the design threshold, the module can be shut down and replaced, and the blocked module can be treated offline, thereby reducing the downtime of the equipment and improving the overall heat exchange efficiency. In addition, the valves of each drain port can be opened periodically for sewage discharge to prevent the risk of scale and blockage on the inner wall of the heat exchange tubes due to excessively high sewage concentration.

[0036] As can be seen from the above embodiments, the modular anti-clogging shell-and-tube heat exchanger of this utility model adopts a short tube design for the heat exchange modules, which can effectively destroy the boundary layer effect of the inner wall of the tube, reduce the deposition effect of impurities such as particles, improve the cleanliness of the inner wall of the tube, and reduce the heat transfer resistance of the tube wall. The short tubes can keep the sewage in the tube in a turbulent state, which can improve the convective heat transfer coefficient in the tube to a certain extent and enhance the heat transfer intensity of the heat exchanger. The whole machine adopts a combination of multiple heat exchange modules, and the various components are connected by flanges, which can realize the rapid replacement of faulty modules. Due to the short heat exchange tubes, the cleaning and treatment of dirt inside the tubes is more convenient. An online sewage discharge system is provided in areas with low flow velocity, such as the water chamber and the tube-side connecting pipe, to facilitate the regular discharge of high-concentration sewage and reduce the risk of scaling and blockage in the heat exchange tubes. It can better adapt to heat exchange scenarios with media containing impurities, effectively improve the overall heat transfer intensity of the heat exchanger, and reduce equipment blockage and downtime maintenance, providing a strong guarantee for energy saving and consumption reduction for enterprises.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular anti-clogging shell-and-tube heat exchanger, characterized in that, include: The heat exchange module includes a heat exchange module, a water chamber, a support structure, and a connecting unit. The heat exchange module includes a shell (6), a shell-side inlet (2), a shell-side outlet (3), heat exchange tubes (14), a tube sheet (16), and a shell-side baffle plate (17). The water chamber includes a connecting water chamber (1), an inlet / outlet water chamber (7), a tube-side inlet (12), a tube-side outlet (13), a drain outlet one (8), an intermediate partition one (18), and a drain outlet three (11). The support structure includes a base (9). The connecting unit includes a shell-side connecting pipe (4), a tube-side connecting pipe (5), an intermediate partition two (15), and a drain outlet two (10). The two ends of the heat exchange tube (14) are inserted into the tube holes of the tube sheet (16) and fixed together with the tube sheet (16). The tube sheet (16) is fixed together with the two ends of the shell (6). The shell (6) is provided with several shell-side baffles (17). The top of the shell (6) is provided with shell-side inlet (2) and shell-side outlet (3) on both sides of the shell-side baffles (17). The tube sheet (16) is fixedly connected to the inlet and outlet water chambers (7), the connecting water chamber (1) and the tube-side connecting pipe (5) respectively. The tubes of the two heat exchange modules are connected together through the tube-side connecting pipe (5), and the shells of the two heat exchange modules are connected together through the shell-side connecting pipe (4). One port of the shell-side connecting pipe (4) is connected to the tube-side connecting pipe (4). The shell-side inlet (2) of the first heat exchange module is connected, and the other port is connected to the shell-side outlet (3) of the second heat exchange module; a middle partition plate (18) is provided in the middle of the inlet and outlet water chamber (7), and a tube-side inlet (12) and a tube-side outlet (13) are respectively opened on both sides of the middle partition plate (18) at the end of the inlet and outlet water chamber (7), and a drain outlet (8) is opened on both sides of the middle partition plate (18) at the bottom of the inlet and outlet water chamber (7); a middle partition plate (15) is provided inside the tube-side connecting pipe (5), and a drain outlet (10) is opened on both sides of the middle partition plate (2) at the bottom of the tube-side connecting pipe (5); a drain outlet (11) is provided directly below the connecting water chamber (1).

2. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, The heat exchange tube (14) is a scaling tube or a straight tube with self-cleaning function.

3. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, Electric isolation valves are installed on the pipelines connected to sewage outlet 1 (8), sewage outlet 2 (10) and sewage outlet 3 (11).

4. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, Online pressure detectors are installed in the inlet and outlet water chambers (7), the connecting water chamber (1), and the pipe-side connecting pipe (5).

5. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, An air vent with isolation function is provided at the bottom of the housing (6).

6. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, An isolation valve is installed on the shell-side connecting pipe (4).

7. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, The outer walls of the tube-side connecting pipe (5) and the shell-side connecting pipe (4) are designed with a corrugated structure.

8. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, The two ends of the heat exchange tube (14) are fixed to the tube sheet (16) by welding or expansion. The tube sheet (16) is welded and fixed to the two ends of the shell (6).

9. A modular anti-clogging shell-and-tube heat exchanger as described in claim 1, characterized in that, The tube sheet (16) is provided with flange holes on its outer periphery, and is fixedly connected to the inlet and outlet water chambers (7), the connecting water chamber (1) and the pipe-side connecting pipe (5) through the flanges respectively.

Images