Bidirectional corrosion-resistant tubular graphite heat exchanger

Abstract

The utility model relates to the field of graphite heat exchangers, and discloses a bidirectional corrosion-resistant tubular graphite heat exchanger which comprises a tank body, supporting rods are arranged on the periphery of the bottom of the tank body, the top of the tank body is communicated with a liquid inlet, the bottom of the tank body is communicated with a liquid outlet, and the side wall of the bottom end of the tank body is communicated with a gas outlet. A gas inlet is communicated with the side wall of the top end of the tank body, a partition plate is arranged on the inner wall of the tank body, a pipe plate is arranged on the inner wall of the tank body, a limiting box is arranged on the pipe plate, a graphite pipe is arranged in the tank body, a limiting assembly for limiting the graphite pipe and the pipe plate is arranged on the pipe plate, and meanwhile limiting rods on the two sides of the graphite pipe can be extruded. The pipe plate slides along the inner wall of the fixing cylinder, meanwhile, the limiting plate slides along the inner wall of the limiting box, deformation force can be eliminated under buffering of the spring, and the situation that when the temperature suddenly changes or the graphite pipe bears large tensile stress, the pipe plate and the graphite pipe are prone to generating microcracks or disengagement, and even the graphite pipe is snapped, and potential safety hazards are caused is avoided.

Description

Technical Field

[0001] The utility model relates to the field of graphite heat exchangers, in particular to a bidirectional corrosion-resistant shell-and-tube graphite heat exchanger. Background Technique

[0002] A graphite heat exchanger is a heat exchanger whose heat transfer components are made of graphite. The graphite used to manufacture the heat exchanger should be impermeable. Commonly used impregnated impermeable graphite and pressed impermeable graphite are used. According to its structure, the graphite heat exchanger can be divided into three types: block-hole type, shell-and-tube type and plate type. Block-hole type: It is assembled by several block-shaped graphite components with holes; Shell-and-tube type: The shell-and-tube heat exchanger occupies an important position in the graphite heat exchanger and is divided into two types according to its structure: fixed type and floating head type; Plate type: The plate heat exchanger is made by bonding graphite plates. In addition, there are also immersion type, spray type and casing type, etc. The graphite heat exchanger has good corrosion resistance, the heat transfer surface is not easy to scale, and the heat transfer performance is good. Graphite is easy to crack, and its bending and tensile strength are low. Therefore, it can only be used for low... For this reason, we have proposed a bidirectional corrosion-resistant shell-and-tube graphite heat exchanger.

[0003] In the existing heat exchangers, the connection between the graphite tube and the tube sheet is mostly bonded with an adhesive. When the temperature changes suddenly or the heat exchanger bears a large tensile stress, microcracks or detachment are likely to occur between the graphite tube and the tube sheet, and even the graphite tube may be pulled off, causing potential safety hazards. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a bidirectional corrosion-resistant shell-and-tube graphite heat exchanger, which solves the problem that in the existing heat exchange, the connection between the graphite tube and the tube sheet is mostly bonded with an adhesive. When the temperature changes suddenly or the heat exchanger bears a large tensile stress, microcracks or detachment are likely to occur on the tube sheet, and even the graphite tube may be pulled off, causing potential safety hazards.

[0006] (2) Technical Solutions

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A bidirectional corrosion-resistant shell-and-tube graphite heat exchanger includes a tank body. Support rods are provided around the bottom. A liquid inlet is communicated with the top of the tank body, a liquid outlet is communicated with the bottom, a gas outlet is communicated with the side wall of the bottom end of the tank body, a gas inlet is communicated with the side wall of the top end of the tank body. A partition is provided on the inner wall of the tank body, a tube sheet is provided on the inner wall of the tank body, a limiting box is provided on the tube sheet, graphite tubes are arranged inside the tank body, and a limiting component for limiting the graphite tubes and the tube sheet is provided on the tube sheet.

[0008] Preferably, there are two groups of the partition plates, the two groups of partition plates are respectively fixedly connected to the top and bottom of the inner wall, there are two groups of the tube plates, the two groups of tube plates are respectively fixedly connected to the top and bottom of the inner wall, the limiting box is fixedly connected to the top of the tube plate, and the graphite tube penetrates through the tube plate and communicates between the two groups of partition plates.

[0009] Preferably, a sealing gasket is arranged between the tube plate and the graphite tube, the top of the tube plate is fixedly connected with a limiting box, the limiting component includes a pull rod, a limiting rod, a fixed cylinder, a limiting plate and a spring, the pull rod is slidably connected to the inner wall of the limiting box, the side wall of the pull rod is fixedly connected to the limiting plate, the limiting plate is slidably connected to the inner wall of the limiting box, the fixed cylinder is fixedly connected to the inner wall of the limiting box, one end of the limiting rod is slidably connected to the inner wall of the fixed cylinder, the other end of the limiting rod penetrates through the limiting plate and is movably clamped on the outer wall of the graphite tube, the limiting rod is fixedly connected to the limiting plate, and the spring is fixedly connected between the side wall of the limiting plate and the inner wall of the limiting box.

[0010] Preferably, a liquid inlet cavity is arranged at the top end inside the tank body, and a liquid outlet cavity is arranged at the bottom end inside the tank body.

[0011] Preferably, the graphite tube is bent, and a plurality of baffle plates are fixedly connected to the inner wall of the tank body.

[0012] Preferably, a sealing cover is arranged at the top of the liquid inlet.

[0013] Preferably, valves are installed on the gas inlet, the gas outlet and the liquid outlet.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present utility model provides a bidirectional corrosion-resistant shell-and-tube graphite heat exchanger, which has the following beneficial effects:

[0016] 1. For this bidirectional corrosion-resistant shell-and-tube graphite heat exchanger, when the temperature inside the tank body changes suddenly or the tensile stress is too large, the deformation forces received by the tube plate and the graphite tube will be eliminated through the sealing gasket. At the same time, the limiting rods on both sides of the graphite tube will be extruded. The tube plate will slide along the inner wall of the fixed cylinder, and at the same time, the limiting plate will slide along the inner wall of the limiting box. Under the buffering of the spring, the deformation force will be eliminated, avoiding the generation of microcracks or detachment between the tube plate and the graphite tube, or even breaking the graphite tube when the temperature changes suddenly or under a large tensile stress, thus causing potential safety hazards.

[0017] 2. For this bidirectional corrosion-resistant shell-and-tube graphite heat exchanger, the injected gas will first enter the liquid inlet cavity and fall on the partition plate, and then flow into the graphite tube. The gas is injected from the gas inlet. Due to the arrangement of the baffle plates, the gas slowly discharges upward along a curved path. Due to the curved arrangement of the graphite tube, the contact time between the gas and the liquid inside the tank body is respectively extended, improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the structure of the present utility model;

[0019] Figure 2 FIG. 2 is a schematic sectional view of the structure of the present utility model;

[0020] Figure 3 FIG. 3 is a schematic side sectional view of the structure of the present utility model;

[0021] Figure 4 FIG. 4 is a schematic diagram of a partial structure of the present utility model;

[0022] Figure 5 FIG. 5 is Figure 4 an enlarged schematic view of part A in FIG. 4.

[0023] In the figures: 1, tank body; 2, support rod; 3, liquid inlet; 31, sealing cover; 4, liquid outlet; 5, gas outlet; 7, gas inlet; 8, baffle; 9, graphite tube; 10, partition plate; 11, tube sheet; 12, limit box; 13, liquid inlet cavity; 14, liquid outlet cavity; 121, pull rod; 122, limit rod; 123, fixed cylinder; 124, limit plate; 125, spring; 15, sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5 , a bidirectional corrosion-resistant tubular graphite heat exchanger, including a tank body 1, support rods 2 are provided around the bottom, a liquid inlet 3 is connected to the top of the tank body 1, a liquid outlet 4 is connected to the bottom, a gas outlet 5 is connected to the side wall of the bottom end of the tank body 1, a gas inlet 7 is connected to the side wall of the top end of the tank body 1, a partition plate 10 is provided on the inner wall of the tank body 1, a tube sheet 11 is provided on the inner wall of the tank body 1, a limit box 12 is provided on the tube sheet 11, a graphite tube 9 is provided inside the tank body 1, and a limit component for limiting the graphite tube 9 and the tube sheet 11 is provided on the tube sheet 11;

[0026] When the device is in use, the support rod 2 supports the device. The cooling liquid or the liquid to be cooled is injected into the liquid inlet cavity 13 from the liquid inlet 3 and flows into the graphite tube 9. At the same time, the cooling gas or the gas to be cooled is injected from the gas inlet 7. The gas and the liquid exchange heat through the graphite tube 9 inside the tank body 1. The gas is discharged from the gas outlet 5, and the liquid is discharged from the liquid outlet 4. The limiting component connects the tube sheet 11 and the graphite tube 9 to prevent the tube sheet 11 and the graphite tube 9 from easily generating micro-cracks or detaching, or even breaking the graphite tube 9 when the temperature changes suddenly or under a large tensile stress, which may cause potential safety hazards.

[0027] There are two groups of partition plates 10, which are respectively fixedly connected to the top and bottom of the inner wall. There are two groups of tube sheets 11, which are respectively fixedly connected to the top and bottom of the inner wall. The limiting box 12 is fixedly connected to the top of the tube sheet 11. The graphite tube 9 passes through the tube sheet 11 and is connected between the two groups of partition plates 10. There is a liquid inlet cavity 13 at the top end inside the tank body 1, and a liquid outlet cavity 14 at the bottom end inside the tank body 1. The graphite tube 9 is bent. A number of baffles 8 are fixedly connected to the inner wall of the tank body 1. The injected gas first enters the liquid inlet cavity 13 and lands on the partition plate 10, and then flows into the graphite tube 9. The gas is injected from the gas inlet 7. Due to the arrangement of the baffles 8, the gas slowly discharges upward along a curved path. Due to the bent arrangement of the graphite tube 9, the contact time of the gas and the liquid inside the tank body 1 is extended respectively, improving the heat exchange efficiency. After the heat exchange is completed, the liquid enters the liquid outlet cavity 14 and finally is discharged from the liquid outlet 4.

[0028] A gasket 15 is provided between the tube sheet 11 and the graphite tube 9. A limit box 12 is fixedly connected to the top of the tube sheet 11. The limit assembly includes a pull rod 121, a limit rod 122, a fixed cylinder 123, a limit plate 124, and a spring 125. The pull rod 121 is slidably connected to the inner wall of the limit box 12. The side wall of the pull rod 121 is fixedly connected to the limit plate 124. The limit plate 124 is slidably connected to the inner wall of the limit box 12. The fixed cylinder 123 is fixedly connected to the inner wall of the limit box 12. One end of the limit rod 122 is slidably connected to the inner wall of the fixed cylinder 123. The other end of the limit rod 122 penetrates through the limit plate 124 and is movably clamped on the outer wall of the graphite tube 9. The limit rod 122 is fixedly connected to the limit plate 124. The spring 125 is fixedly connected between the side wall of the limit plate 124 and the inner wall of the limit box 12. When the temperature inside the tank 1 changes suddenly or the tensile stress is too large, the deformation forces received by the tube sheet 11 and the graphite tube 9 will be eliminated through the gasket 15. At the same time, the limit rods 122 on both sides of the graphite tube 9 will be squeezed. The tube sheet 11 will slide along the inner wall of the fixed cylinder 123. At the same time, the limit plate 124 will slide along the inner wall of the limit box 12. Under the buffering of the spring 125, the deformation forces will be eliminated, avoiding the generation of microcracks or detachment between the tube sheet 11 and the graphite tube 9, or even breaking the graphite tube when the temperature changes suddenly or when a large tensile stress is borne, which may cause potential safety hazards. Pull the pull rod 121, the pull rod 121 drives the limit plate 124 to move, the limit plate 124 drives the limit rod 122 to slide along the inner wall of the fixed cylinder 123, and the limit plate 124 compresses the spring 125. Install the graphite tube 9 and the gasket 15 on the tube sheet 11. Release the pull rod 121. Under the action of the spring 125, the limit rod 122 is clamped on the graphite tube 9, which is convenient for the installation of the graphite tube 9.

[0029] A sealing cover 31 is provided at the top of the liquid inlet 3. After the cooling is over, install the sealing cover 31 on the liquid inlet 3 to realize the opening or closing of the liquid inlet 3.

[0030] Valves are installed on the gas inlet 7, the gas outlet 5, and the liquid outlet 4. By installing the valves, the opening or closing of the liquid outlet 4, the gas outlet 5, and the gas inlet 7 can be realized.

[0031] Working principle

[0032] When the device is in use, the support rod 2 supports the device. The cooling liquid or the liquid to be cooled is injected into the liquid inlet cavity 13 from the liquid inlet 3 and flows into the graphite tube 9. At the same time, the cooling gas or the gas to be cooled is injected from the gas inlet 7. The gas and the liquid exchange heat through the graphite tube 9 inside the tank body 1. The gas is discharged from the gas outlet 5, and the liquid is discharged from the liquid outlet 4. When the temperature inside the tank body 1 changes suddenly or the tensile stress is too large, the deformation force received by the tube sheet 11 and the graphite tube 9 will be eliminated through the gasket 15. At the same time, the limiting rods 122 on both sides of the graphite tube 9 will be squeezed. The tube sheet 11 will slide along the inner wall of the fixed cylinder 123. At the same time, the limiting plate 124 will slide along the inner wall of the limiting box 12. Under the buffering of the spring 125, the deformation force will be eliminated.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bidirectional corrosion-resistant shell-and-tube graphite heat exchanger, comprising a tank body (1), wherein support rods (2) are arranged around the bottom of the tank body (1), a liquid inlet (3) is communicated with the top of the tank body (1), a liquid outlet (4) is communicated with the bottom, a gas outlet (5) is communicated with the side wall of the bottom end of the tank body (1), and a gas inlet (7) is communicated with the side wall of the top end of the tank body (1), and is characterized in that: The inner wall of the tank body (1) is provided with a partition plate (10), the inner wall of the tank body (1) is provided with a tube sheet (11), the tube sheet (11) is provided with a limit box (12), the interior of the tank body (1) is provided with a graphite tube (9), and the tube sheet (11) is provided with a limit component for limiting the graphite tube (9) and the tube sheet (11).

2. A bidirectional corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: There are two groups of the partition plates (10), and the two groups of partition plates (10) are respectively fixedly connected to the top and bottom of the inner wall. There are two groups of the tube sheets (11), and the two groups of tube sheets (11) are respectively fixedly connected to the top and bottom of the inner wall. The limit box (12) is fixedly connected to the top of the tube sheet (11). The graphite tube (9) penetrates through the tube sheet (11) and is communicated between the two groups of partition plates (10).

3. A two-way corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: A gasket (15) is arranged between the tube sheet (11) and the graphite tube (9). The limit box (12) is fixedly connected to the top of the tube sheet (11). The limit component includes a pull rod (121), a limit rod (122), a fixed cylinder (123), a limit plate (124), and a spring (125). The pull rod (121) is slidably connected to the inner wall of the limit box (12). The side wall of the pull rod (121) is fixedly connected to the limit plate (124). The limit plate (124) is slidably connected to the inner wall of the limit box (12). The fixed cylinder (123) is fixedly connected to the inner wall of the limit box (12). One end of the limit rod (122) is slidably connected to the inner wall of the fixed cylinder (123). The other end of the limit rod (122) penetrates through the limit plate (124) and is movably clamped on the outer wall of the graphite tube (9). The limit rod (122) is fixedly connected to the limit plate (124). The spring (125) is fixedly connected between the side wall of the limit plate (124) and the inner wall of the limit box (12).

4. A two-way corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: A liquid inlet cavity (13) is arranged at the top end inside the tank body (1), and a liquid outlet cavity (14) is arranged at the bottom end inside the tank body (1).

5. A two-way corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: The graphite tube (9) is bent, and a plurality of baffle plates (8) are fixedly connected to the inner wall of the tank body (1).

6. A two-way corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: A sealing cover (31) is arranged at the top of the liquid inlet (3).

7. A two-way corrosion-resistant shell-and-tube graphite heat exchanger according to claim 1, characterized in that: Valves are installed on the gas inlet (7), the gas outlet (5), and the liquid outlet (4).

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