Corrosion-resistant graphite heat exchanger
The graphite heat exchanger addresses the issue of corrosion in high-temperature applications by integrating a corrosion-resistant structure with enhanced heat transfer and flow dynamics, ensuring effective operation in corrosive conditions.
Patent Information
- Application Number
- CN202422022381.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Existing graphite heat exchangers cannot be used effectively in high-temperature corrosive media environments, steel shells are not corrosion-resistant, and lining glue fails at high temperatures, limiting its application range.
The graphite thermal conductivity and corrosion resistance groove structure are used, and the corrosion resistance of non-corrosive media is filled with Venturi flow guide components to improve the fluidity and thermal conductivity of the medium, isolate the corrosion resistance and thermal conductivity of the corrosive media from the heat exchange components, and utilize the corrosion resistance and thermal conductivity of graphite to enhance the corrosion resistance of the equipment and improve the heat exchange efficiency.
It realizes corrosion resistance and efficient heat exchange in a high-temperature corrosive medium environment, and improves the working efficiency and heat exchange rate of the equipment.
Smart Images
Figure CN223106739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a corrosion-resistant graphite heat exchanger. Background Technique
[0002] In industries such as phosphorous chemical industry, titanium dioxide, chemical fertilizer, fine chemical industry, and three-waste treatment, graphite heat exchangers are widely used. Graphite heat exchangers can improve the heat exchange efficiency of heat exchangers. However, due to structural limitations, most graphite heat exchangers are shell-and-tube heat exchangers, whose outer shell layer is made of steel and is not corrosion-resistant. Corrosive media pass through the graphite tube side, and water or steam passes through the shell side. If corrosive media pass through both the tube side and the shell side, it is necessary to coat the inner wall of the steel shell with rubber lining. The rubber lining is not resistant to high temperatures, and the recommended use temperature is generally not higher than 100°C. Therefore, the existing graphite heat exchangers cannot be used for heat exchange of high-temperature corrosive media. Content of the Utility Model
[0003] The purpose of the utility model is to provide a corrosion-resistant graphite heat exchanger to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution:
[0005] A corrosion-resistant graphite heat exchanger includes a discharge pipe, a heat absorption pipe, a heat exchange component, a graphite heat conduction component, and a Venturi flow guiding component;
[0006] Inside the discharge pipe provided at the heat absorption end of the heat exchange component and inside the heat absorption pipe provided at the heat release end of the heat exchange component, which is used to absorb the heat in the discharge pipe and transfer it to the heat absorption pipe;
[0007] The graphite heat conduction component is installed in the discharge pipe and the heat absorption pipe. An anti-corrosion groove is provided between the graphite heat conduction component and the inner walls of the discharge pipe and the heat absorption pipe, and the anti-corrosion groove is filled with a non-corrosive medium with strong heat conduction performance. The heat absorption end and the heat release end of the heat exchange component are arranged in the anti-corrosion groove, which is used to conduct heat to the heat absorption end and the heat release end of the heat exchange component while realizing the anti-corrosion protection of the heat absorption end and the heat release end of the heat exchange component;
[0008] The Venturi flow guiding component is installed in the graphite heat conduction component and is used to accelerate the flow guiding of the flowing medium in the discharge pipe and the heat absorption pipe, and improve the heat exchange rate of the equipment.
[0009] As a further scheme of the utility model: The heat exchange component includes a capillary tube, a compressor, and a heat exchange tube;
[0010] A first main connection pipe and a second main connection pipe are respectively installed on the outer walls of the discharge pipe and the heat absorption pipe. A first connection pipe and a second connection pipe are arranged between the discharge pipe and the heat absorption pipe. The first connection pipe and the second connection pipe are connected between the first main connection pipe and the second main connection pipe. A plurality of heat exchange pipes are provided, and a plurality of heat dissipation pipes are arranged in the anti-corrosion tank. Both ends of the heat exchange pipe are fixedly connected to the first main connection pipe and the second main connection pipe. The capillary tube is installed in the first connection pipe, and the compressor is installed in the second connection pipe.
[0011] As a further solution of the present invention: the graphite heat conduction assembly includes an anti-corrosion graphite layer and a graphite heat conduction block;
[0012] The anti-corrosion graphite layer is fixedly connected to the inner walls of the discharge pipe and the heat absorption pipe. The anti-corrosion tank is arranged between the anti-corrosion graphite layer and the inner walls of the discharge pipe and the heat absorption pipe. The graphite heat conduction block is fixedly connected to the inner wall of the anti-corrosion graphite layer. One end of the graphite heat conduction block is arranged in the anti-corrosion tank and is fixedly connected to the heat exchange pipe, and one end of the graphite heat conduction block is arranged inside the inner circle of the inner anti-corrosion graphite layer.
[0013] As a still further solution of the present invention: the Venturi flow guiding assembly includes a plurality of graphite heat conduction meshes and a heat conduction cone;
[0014] A plurality of the graphite heat conduction meshes are fixedly connected to the graphite heat conduction block, and the mesh of the graphite heat conduction mesh gradually becomes denser along the medium flow direction. The heat conduction cone is fixedly connected between the plurality of graphite heat conduction meshes, and the top of the heat conduction cone faces the medium inflow direction, while the bottom surface of the heat conduction cone faces the medium outflow direction.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention isolates the heat exchange assembly through the setting of the graphite heat conduction assembly, and since graphite has good heat conductivity while having corrosion resistance, while ensuring the corrosion resistance of the equipment, it can also improve the heat exchange efficiency of the heat exchange assembly. During heat exchange, the heat exchange rate between the graphite heat conduction assembly and the flowing medium can be improved through the setting of the Venturi flow guiding assembly, thereby improving the working efficiency of the equipment. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of a corrosion-resistant graphite heat exchanger in the present invention.
[0017] Figure 2 It is a sectional view of a corrosion-resistant graphite heat exchanger in the present invention.
[0018] Figure 3 It is a sectional view of a corrosion-resistant graphite heat exchanger in the present invention.
[0019] In the figure: 1 - discharge pipe, 2 - heat absorption pipe, 3 - first main connection pipe, 4 - second main connection pipe, 5 - first connecting pipe, 6 - second connecting pipe, 7 - capillary tube, 8 - compressor, 9 - anti-corrosion graphite layer, 10 - heat exchange tube, 11 - graphite heat conduction block, 12 - graphite heat conduction net, 13 - heat conduction cone. Specific implementation manner
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.
[0021] Refer to Figures 1 to 3 , in the embodiment of the present utility model, a corrosion-resistant graphite heat exchanger includes a discharge pipe 1, a heat absorption pipe 2, a heat exchange assembly, a graphite heat conduction assembly, and a Venturi flow guiding assembly; the discharge pipe 1 provided at the heat absorption end of the heat exchange assembly, and the heat absorption pipe 2 provided at the heat release end of the heat exchange assembly are used to absorb the heat in the discharge pipe 1 and transfer it into the heat absorption pipe 2; the graphite heat conduction assembly is installed in the discharge pipe 1 and the heat absorption pipe 2, and an anti-corrosion groove is provided between the graphite heat conduction assembly and the inner walls of the discharge pipe 1 and the heat absorption pipe 2, and a non-corrosive medium with strong heat conduction performance is filled in the anti-corrosion groove. The heat absorption end and the heat release end of the heat exchange assembly are provided in the anti-corrosion groove, which is used to conduct heat to the heat absorption end and the heat release end of the heat exchange assembly while realizing anti-corrosion protection for the heat absorption end and the heat release end of the heat exchange assembly; the Venturi flow guiding assembly is installed in the graphite heat conduction assembly and is used to accelerate the flow of the flowing medium in the discharge pipe 1 and the heat absorption pipe 2, improving the heat exchange rate of the equipment. The present utility model isolates the heat exchange assembly through the setting of the graphite heat conduction assembly, and since graphite has good heat conduction while having corrosion resistance, the heat exchange efficiency of the heat exchange assembly can be ensured. At this time, the heat in the discharge pipe 1 can be absorbed and transferred into the heat absorption pipe 2 through the setting of the heat exchange assembly, thereby realizing heat exchange. At the same time of heat exchange, the heat exchange rate between the graphite heat conduction assembly and the flowing medium can be improved through the setting of the Venturi flow guiding assembly, improving the working efficiency of the equipment.
[0022] In one case of this embodiment, please refer to Figures 1 to 3, the heat exchange component includes a capillary tube 7, a compressor 8, and a heat exchange tube 10; a first main connection pipe 3 and a second main connection pipe 4 are respectively installed on the outer walls of the discharge pipe 1 and the heat absorption pipe 2. A first connection pipe 5 and a second connection pipe 6 are arranged between the discharge pipe 1 and the heat absorption pipe 2. The first connection pipe 5 and the second connection pipe 6 are connected between the first main connection pipe 3 and the second main connection pipe 4. Multiple groups of heat exchange tubes 10 are provided, and multiple groups of heat dissipation tubes are arranged in the anti-corrosion tank. Both ends of the heat exchange tube 10 are fixedly connected to the first main connection pipe 3 and the second main connection pipe 4. The capillary tube 7 is installed in the first connection pipe 5, and the compressor 8 is installed in the second connection pipe 6. The heat exchange component absorbs the heat in the exhaust pipe discharge pipe 1 through the low-temperature refrigerant gas in the heat exchange tube 10 of the discharge pipe 1. After the heat absorption is completed, the refrigerant gas flows into the compressor 8 along the second connection pipe 6. Thus, the compressor 8 compresses the refrigerant gas to form a high-temperature refrigerant liquid. The high-temperature refrigerant liquid flows into the heat exchange tube 10 in the heat absorption pipe 2 and transfers the heat to the flowing medium in the heat absorption pipe 2 through the heat exchange tube 10. Thus, the heat absorbed in the discharge pipe 1 is transferred to the heat absorption pipe 2. The cooled normal-temperature refrigerant liquid flows into the capillary tube 7. Since the diameter of the capillary tube 7 is small, the flow rate of the refrigerant liquid in the capillary tube 7 increases and the pressure increases. Then, when the normal-temperature refrigerant liquid enters the first connection pipe 5 of the heat absorption pipe 2 through the capillary tube 7, the normal-temperature refrigerant changes from a high flow rate to a low flow rate and generates a large pressure drop. The large pressure drop reduces the boiling point of the refrigerant and causes it to start evaporating and absorbing heat, generating low-temperature refrigerant vapor and flowing into the discharge pipe 1. Thus, the cyclic recovery of the heat in the discharge pipe 1 is realized.
[0023] In one case of this embodiment, please refer to Figures 1 to 3 , the graphite heat conduction component includes an anti-corrosion graphite layer 9 and a graphite heat conduction block 11; the anti-corrosion graphite layer 9 is fixedly connected to the inner walls of the discharge pipe 1 and the heat absorption pipe 2. The anti-corrosion tank is arranged between the anti-corrosion graphite layer 9 and the inner walls of the discharge pipe 1 and the heat absorption pipe 2. The graphite heat conduction block 11 is fixedly connected to the inner wall of the anti-corrosion graphite layer 9. One end of the graphite heat conduction block 11 is arranged in the anti-corrosion tank and is fixedly connected to the heat exchange tube 10. One end of the graphite heat conduction block 11 is arranged inside the inner circle of the inner anti-corrosion graphite layer 9. The graphite heat conduction component isolates and protects the heat exchange component through the setting of the anti-corrosion layer, avoiding direct contact between the heat exchange component and the corrosive medium. At the same time, it conducts heat through the excellent heat conductivity of graphite. At the same time, the graphite heat conduction block 11 transfers the heat deep into the anti-corrosion tank, or quickly transfers the heat deep in the anti-corrosion tank to the medium, thereby accelerating the heat transfer efficiency.
[0024] In one case of this embodiment, please refer to Figures 1 to 3, the Venturi flow guiding assembly includes multiple groups of graphite heat conduction meshes 12 and heat conduction cones 13; the multiple groups of graphite heat conduction meshes 12 are fixedly connected to the graphite heat conduction block 11, and the mesh of the graphite heat conduction mesh 12 gradually becomes denser along the medium flow direction. The heat conduction cone 13 is fixedly connected between the multiple groups of graphite heat conduction meshes 12, and the top of the heat conduction cone 13 faces the medium inflow direction, while the bottom surface of the heat conduction cone 13 faces the medium outflow direction. The Venturi flow guiding assembly first generates a flow path with a gradually decreasing diameter in the discharge pipe 1 and the heat absorption pipe 2 through the setting of the anti-corrosion graphite layer 9. At this time, when a low-pressure and low-flow medium flows into the flow path with a smaller diameter, the medium pressure increases and the flow rate accelerates. At the same time, during the flow of the medium, the heat in the medium is absorbed or introduced into the medium through the multiple layers of graphite heat conduction meshes 12 and the heat conduction cones 13. And in this solution, the mesh of the graphite heat conduction mesh 12 gradually becomes denser along the medium flow direction, so that the greater the temperature difference between the two sides of the graphite heat conduction mesh 12, the smaller the contact area, and vice versa, when the temperature difference is smaller, the contact area is larger. Thus, the uniform transfer of heat in the narrow pipeline is realized.
Claims
1. A corrosion-resistant graphite heat exchanger, characterized in that, It includes an exhaust pipe, a heat absorption pipe, a heat exchange component, a graphite heat conduction component, and a Venturi flow guiding component; Inside the exhaust pipe provided at the heat absorption end of the heat exchange component and inside the heat absorption pipe provided at the heat release end of the heat exchange component, it is used to absorb the heat in the exhaust pipe and transfer it into the heat absorption pipe; The graphite heat conduction component is installed inside the exhaust pipe and the heat absorption pipe. An anti-corrosion groove is provided between the graphite heat conduction component and the inner walls of the exhaust pipe and the heat absorption pipe. The anti-corrosion groove is filled with a non-corrosive medium with strong heat conduction performance. The heat absorption end and the heat release end of the heat exchange component are arranged inside the anti-corrosion groove, which is used to conduct heat to the heat absorption end and the heat release end of the heat exchange component while realizing anti-corrosion protection for the heat absorption end and the heat release end of the heat exchange component; The Venturi flow guiding component is installed inside the graphite heat conduction component and is used to accelerate the flow guiding of the flowing medium inside the exhaust pipe and the heat absorption pipe, improving the heat exchange rate of the equipment.
2. The corrosion-resistant graphite heat exchanger according to claim 1, wherein, The heat exchange component includes a capillary tube, a compressor, and a heat exchange pipe; A first main connection pipe and a second main connection pipe are respectively installed on the outer walls of the exhaust pipe and the heat absorption pipe. A first connection pipe and a second connection pipe are provided between the exhaust pipe and the heat absorption pipe. The first connection pipe and the second connection pipe are connected between the first main connection pipe and the second main connection pipe. There are multiple groups of the heat exchange pipes, and multiple groups of heat dissipation pipes are arranged inside the anti-corrosion groove. Both ends of the heat exchange pipe are fixedly connected to the first main connection pipe and the second main connection pipe. The capillary tube is installed inside the first connection pipe, and the compressor is installed inside the second connection pipe.
3. The corrosion-resistant graphite heat exchanger according to claim 2, characterized in that, The graphite heat conduction component includes an anti-corrosion graphite layer and a graphite heat conduction block; The anti-corrosion graphite layer is fixedly connected to the inner walls of the exhaust pipe and the heat absorption pipe. The anti-corrosion groove is provided between the anti-corrosion graphite layer and the inner walls of the exhaust pipe and the heat absorption pipe. The graphite heat conduction block is fixedly connected to the inner wall of the anti-corrosion graphite layer. One end of the graphite heat conduction block is arranged inside the anti-corrosion groove and is fixedly connected to the heat exchange pipe, and one end of the graphite heat conduction block is arranged inside the inner circle of the inner anti-corrosion graphite layer.
4. The corrosion-resistant graphite heat exchanger according to claim 3, wherein The Venturi flow guiding component includes multiple groups of graphite heat conduction meshes and a heat conduction cone; Multiple groups of the graphite heat conduction meshes are fixedly connected to the graphite heat conduction block, and the mesh of the graphite heat conduction mesh gradually becomes denser along the direction of the medium flow. The heat conduction cone is fixedly connected between multiple groups of the graphite heat conduction meshes, and the top of the heat conduction cone faces the direction of the medium inflow, while the bottom surface of the heat conduction cone faces the direction of the medium outflow.