A tubular heat exchanger with corrosion resistance

Abstract

This utility model discloses a tubular heat exchanger with anti-corrosion function, including a shell. An upper sealing plate and a lower sealing plate are provided inside the shell cavity. Multiple heat exchange tubes are arranged between the upper and lower sealing plates, dividing the shell cavity into an outlet chamber and an inlet chamber. The two ends of the heat exchange tubes pass through the upper and lower sealing plates, respectively, extending into the outlet chamber and the inlet chamber. A protective cover is installed at the end of the heat exchange tube in the inlet chamber. The protective cover includes a protective panel with air inlets corresponding to the number and position of the heat exchange tubes. A connecting pipe is fixed to one side of each air inlet. The connecting pipe is inserted into the heat exchange tube, and there is a sliding fit between the connecting pipe and the heat exchange tube. The air inlets, connecting pipes, and heat-conducting tubes are connected. This utility model can effectively extend the service life of the heat exchange tubes, protect the heat exchanger from damage, and reduce maintenance frequency and costs.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a tubular heat exchanger with anti-corrosion function. Background Technology

[0002] A heat exchanger is a device that transfers part of the heat from a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] In the process of realizing this utility model, the inventors discovered that: The high-temperature corrosive gases generated during waste pyrolysis severely corrode the heat exchanger tubes as they flow through the heat exchanger, resulting in short tube lifespan and high replacement costs. Currently used stainless steel materials struggle to maintain long-term stability in this harsh environment. Furthermore, the continuous erosion from the high-speed airflow exacerbates wear at the heat exchanger tube inlet. Once the tube wall is damaged, internal cooling water will leak, affecting system safety and increasing wastewater. Conventional anti-corrosion methods, such as surface spraying of protective coatings, are insufficient to provide effective protection at temperatures reaching 600°C in this area. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, this utility model proposes a tubular heat exchanger with anti-corrosion function.

[0005] Invention concept: Given that the existing coating cannot withstand high temperatures and airflow erosion, we propose to install a protective cover that is easy to install and remove at the air inlet of the heat pipe. The protective cover will block all corrosion and erosion without affecting the airflow. When the protective cover is damaged, it can be replaced periodically, thus ensuring that the heat exchanger body is not damaged.

[0006] Therefore, the technical solution of this utility model is as follows: a tubular heat exchanger with anti-corrosion function, comprising a shell, an upper sealing plate and a lower sealing plate provided in the inner cavity of the shell, and multiple heat exchange tubes provided between the upper sealing plate and the lower sealing plate, characterized in that: the upper sealing plate and the lower sealing plate divide the inner cavity of the shell to form an outlet chamber and an inlet chamber, the two ends of the heat exchange tubes respectively penetrate the upper sealing plate and the lower sealing plate and extend into the outlet chamber and the inlet chamber, and a protective cover is installed at the end of the heat exchange tube in the inlet chamber. The protective cover includes a protective panel with air inlets corresponding to the number and position of the heat exchange tubes. Each air inlet has a plug pipe fixed on one side. The plug pipe is inserted into the heat exchange tube and is slidably fitted with the heat exchange tube. The air inlet, plug pipe, and heat conduction tube are connected.

[0007] A further improvement to the above technical solution is that a protective cover is installed at the end of the heat exchange tube in the air inlet chamber. The specific installation structure includes a threaded pull rod at one end, which passes through a heat exchange tube located at the center. A support rod is fixed vertically at the unthreaded end of the pull rod, which is used to lift the protective panel from the bottom. A limiting support plate passes through the other end of the pull rod and is fixed to the other end of the heat exchange tube by a nut. This structure is easy to implement and convenient to disassemble and maintain.

[0008] A further improvement to the above technical solution is that the limiting support plate, the bracket, and the nut are made of corrosion-resistant and high-temperature resistant steel materials, which can extend the service life and reduce the maintenance frequency.

[0009] A further improvement to the above technical solution is that the corrosion-resistant and high-temperature resistant steel material is made of 310S stainless steel; 310S stainless steel has excellent high-temperature oxidation resistance, excellent high-temperature strength, outstanding corrosion resistance, and stable microstructure.

[0010] A further improvement to the above technical solution is that the protective panel and the plug-in plate are made of the same material as the heat exchange tubes. This saves costs, and as consumables, their purpose is to prevent damage to the heat exchange tubes and protect the heat exchanger body from damage. Beneficial effects: Compared with the prior art, this utility model adds a protective cover to the air inlet end of the heat exchanger. The protective cover has a pipe to ensure normal airflow. All corrosion and erosion are blocked by the protective cover. When the protective cover is damaged, it can be replaced periodically, thereby ensuring that the main body of the heat exchanger is not damaged, reducing maintenance costs and reducing potential safety hazards. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention.

[0012] Figure 2 This is a structural diagram of the protective cover of this utility model.

[0013] Figure 3 This is a schematic diagram of the protective cover mounting component of this utility model.

[0014] The following components are shown in the figure: 1. Shell; 2. Upper sealing plate; 3. Lower sealing plate; 4. Heat exchange tube; 5. Air outlet chamber; 6. Air inlet chamber; 7. Protective panel; 8. Connecting pipe; 9. Pull rod; 10. Support rod; 11. Limiting support plate; 12. Nut; 13. Water inlet; 14. Water outlet. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings, but this embodiment should not be construed as a limitation of this utility model.

[0016] This utility model is as follows Figures 1 to 3 As shown: A corrosion-resistant tubular heat exchanger includes a shell 1. An upper sealing plate 2 and a lower sealing plate 3 are provided within the shell cavity. Multiple heat exchange tubes 4 are arranged between the upper and lower sealing plates. The upper and lower sealing plates divide the shell cavity into an outlet chamber 5 and an inlet chamber 6. The two ends of the heat exchange tubes pass through the upper and lower sealing plates, respectively, extending into the outlet chamber and the inlet chamber. A protective cover is installed at the end of the heat exchange tube in the inlet chamber. The protective cover includes a protective panel 7, on which air inlets are provided corresponding to the number and position of the heat exchange tubes. Each air inlet is fixed with a plug pipe 8 on one side. The plug pipe is inserted into the heat exchange tube and is slidably fitted with the heat exchange tube. The air inlet, plug pipe, and heat conduction tube are connected.

[0017] In this embodiment, the installation structure of the heat exchange tube end and the protective cover in the air inlet chamber includes a threaded pull rod 9 at one end, which passes through a heat exchange tube located at the center. A support rod 10 is fixed vertically at the unthreaded end of the pull rod, which is used to support the protective panel 7 from the bottom. A limiting support plate 11 passes through the other end of the pull rod and is fixed to the other end of the heat exchange tube by a nut 12. This structure facilitates replacement and maintenance, and avoids problems such as water leakage and environmental pollution caused by heat exchange tube damage. The limiting support plate, support rod, and nut are made of corrosion-resistant and high-temperature resistant steel materials, such as 310S stainless steel, which can extend the service life and reduce the frequency of maintenance. Although the cost is relatively high, it is more economical from the perspective of long-term reliability. The protective panel and plug plate are made of the same material as the heat exchange tube, which is relatively low in cost. As consumables, they are intended to prevent damage to the heat exchange tube and protect the heat exchanger body from damage.

[0018] In addition, the shell is provided with a condensate inlet 13 and an outlet 14 that communicate with the inner cavity, which are used to connect and drain condensate, respectively.

[0019] Any aspects not described in detail in this specification are techniques well-known in the art.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tubular heat exchanger with anti-corrosion function, comprising a shell, an inner cavity of the shell being provided with an upper sealing plate and a lower sealing plate, and a plurality of heat exchange tubes being arranged between the upper sealing plate and the lower sealing plate, characterized in that: The upper and lower sealing plates divide the inner cavity of the shell into an outlet chamber and an inlet chamber. The two ends of the heat exchange tubes extend through the upper and lower sealing plates into the outlet chamber and the inlet chamber, respectively. A protective cover is installed at the end of the heat exchange tube in the inlet chamber. The protective cover includes a protective panel with air inlets corresponding to the number and position of the heat exchange tubes. Each air inlet has a plug pipe fixed on one side. The plug pipe is inserted into the heat exchange tube and is slidably fitted with the heat exchange tube. The air inlet, plug pipe, and heat conduction tube are connected.

2. The tubular heat exchanger with the anti-corrosion function according to claim 1, characterized in that: The heat exchange tube end of the air inlet chamber is equipped with a protective cover. The specific installation structure includes a threaded pull rod at one end, which passes through a heat exchange tube located at the center. A support rod is fixed vertically at the unthreaded end of the pull rod. The support rod is used to lift the protective panel from the bottom. A limiting support plate passes through the other end of the pull rod and is fixed to the other end of the heat exchange tube by a nut.

3. A tubular heat exchanger with anti-corrosion function according to claim 2, characterized in that: The limiting support plate, bracket, and nut are made of corrosion-resistant and high-temperature resistant steel.

4. A tubular heat exchanger with anti-corrosion function according to claim 3, characterized in that: The corrosion-resistant and high-temperature resistant steel material is made of 310S stainless steel.

5. A tubular heat exchanger with anti-corrosion function according to claim 4, characterized in that: The protective panel and plug-in plate are made of the same material as the heat exchange tube.

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