Round block graphite heat exchanger with high sealing performance

Abstract

The utility model relates to a round block graphite heat exchanger with high sealing performance, which comprises a shell, a plurality of graphite blocks, an upper sealing head and a lower sealing head, the plurality of graphite blocks are laminated in the shell, the upper sealing head and the lower sealing head are respectively arranged at the upper end and the lower end of the shell, and the side walls of the upper end and the lower end of the shell are provided with a cooling water inlet and a cooling water outlet. The graphite blocks are provided with cooling flow channels in the radial direction and medium flow channels in the axial direction, the upper sealing head and the lower sealing head abut against the graphite blocks on the top layer and the graphite blocks on the bottom layer respectively, the medium flow channels are used for being communicated with the liquid inlet and the liquid outlet, and flow channels are formed in the upper sealing head and the lower sealing head. Skirts are arranged on the outer rings of the sides, abutting against the graphite blocks, of the flow channels, protruding rings are arranged on the end faces of the flow channels, and annular grooves corresponding to the protruding rings are formed in the end faces of the graphite blocks on the surface layer. A skirt edge is arranged at one end, in contact with the graphite block, of the runner and is in contact with the surface of the graphite block, so that media are prevented from leaking.

Description

TECHNICAL FIELD

[0001] The utility model relates to graphite heat exchanger technical field especially relates to a high sealing round block graphite heat exchanger. BACKGROUND

[0002] Round block hole type graphite heat exchanger is made of graphite heat exchanger, has excellent corrosion resistance and heat transfer performance, is applicable to the heat transfer process of corrosive medium. In order to save stainless steel and valuable nonferrous metal materials, graphite heat exchanger is widely used in processing hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid and other corrosive medium. In addition to mainly used in acid alkali pesticide and other industries, it is also widely used in chemical, dye, petroleum, chemical industry, organic synthesis, metal refining, metal surface processing, inorganic medicine, pharmaceutical, food and atomic energy and other industrial departments. For heating, cooling, condensation, evaporation and absorption and other chemical unit operations. In order to prevent medium leakage, currently, the upper and lower ends of the heat exchanger are equipped with end caps, the existing end cap and graphite block lack sealing design, which leads to the leakage of medium between the end cap and the end face of the graphite block, resulting in corrosion of the heat exchanger shell and reducing the service life of the graphite heat exchanger as a whole, thus improvement is needed. SUMMARY

[0003] Therefore, it is necessary to provide a high sealing round block graphite heat exchanger aiming at the above problems.

[0004] A high sealing round block graphite heat exchanger, comprising an outer shell, a plurality of graphite blocks, an upper sealing head and a lower sealing head, the upper end of the outer shell is provided with a liquid inlet, the lower end of the outer shell is provided with a liquid outlet, the plurality of graphite blocks are stacked and installed in the outer shell, the upper sealing head and the lower sealing head are respectively arranged at the upper end and the lower end of the outer shell, the upper sealing head is arranged below the liquid inlet, the lower sealing head is arranged above the liquid outlet, the upper end side wall of the outer shell is provided with a cooling water inlet, the lower end side wall of the outer shell is provided with a cooling water outlet, the graphite blocks are in the shape of round blocks, the graphite blocks are provided with cooling flow channels in the radial direction, the graphite blocks are provided with medium flow channels in the axial direction, the cooling flow channels are used for communicating with the cooling water inlet and the cooling water outlet, the upper sealing head and the lower sealing head respectively abut against the graphite blocks of the top layer and the bottom layer, the medium flow channels are used for communicating with the liquid inlet and the liquid outlet, the outer periphery of the upper sealing head and the lower sealing head is provided with a first sealing ring, a flow channel is arranged in the upper sealing head and the lower sealing head, the diameter of the flow channel gradually decreases towards the side away from the graphite blocks, the outer ring of the abutment side of the flow channel and the graphite blocks is provided with a skirt, the end face of the flow channel is provided with a convex ring, and the end face of the graphite block of the surface layer is provided with a ring groove corresponding to the convex ring.

[0005] Preferably, the graphite blocks are subjected to impregnation treatment.

[0006] Preferably, the inner surface of the outer shell is subjected to rotational molding treatment.

[0007] Preferably, a gasket is sandwiched between two adjacent graphite blocks, and the gasket is provided with a flow-blocking cone at the medium flow channel, the pointed part of the flow-blocking cone extending into the medium flow channel of the lower graphite block.

[0008] The advantages of this utility model are as follows: at the end of the flow channel that contacts the graphite block, a skirt is provided to contact the surface of the graphite block to enhance the sealing between the upper and lower sealing heads and the graphite block; a convex ring is provided on the end face of the flow channel to cooperate with the skirt to enhance the sealing between the upper and lower sealing heads and the contact surface of the graphite block, and to prevent the medium from leaking out. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a highly airtight circular graphite heat exchanger structure according to one embodiment;

[0010] Figure 2 for Figure 1 Enlarged diagram of section A in the middle;

[0011] Figure 3 for Figure 1 Enlarged schematic diagram of section B in the middle. Detailed Implementation

[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0013] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0014] Unless otherwise defined, 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0015] like Figures 1 to 3 As shown, a high-sealing circular graphite heat exchanger includes a shell 1, several graphite blocks 2, an upper sealing head 3, and a lower sealing head 4. The upper end of the shell 1 has a liquid inlet 11, and the lower end of the shell 1 has a liquid outlet 12. Several graphite blocks 2 are stacked and installed inside the shell 1. The upper sealing head 3 and the lower sealing head 4 are respectively located at the upper and lower ends of the shell 1. The upper sealing head 3 is located below the liquid inlet 11, and the lower sealing head 4 is located above the liquid outlet 12. The upper sidewall of the shell 1 has a cooling water inlet 13, and the lower sidewall of the shell 1 has a cooling water outlet 14. The graphite blocks 2 are circular in shape, and each graphite block 2 has a cooling channel 21 arranged radially and axially. A medium flow channel 22 is provided in the direction of the cooling flow channel 21, which is used to communicate with the cooling water inlet 13 and the cooling water outlet 14. The upper sealing head 3 and the lower sealing head 4 respectively abut against the graphite blocks 2 of the top and bottom layers. The medium flow channel 22 is used to communicate with the liquid inlet 11 and the liquid outlet 12. The outer peripheral surface of the upper sealing head 3 and the lower sealing head 4 is provided with a first sealing ring 31. The upper sealing head 3 and the lower sealing head 4 are provided with a flow channel 32. The diameter of the flow channel 32 gradually decreases towards the side away from the graphite block 2. The outer ring of the flow channel 32 on the side abutting against the graphite block 2 is provided with a skirt 33. The end face of the flow channel 32 is provided with a convex ring 34. The end face of the graphite block 2 on the surface is provided with an annular groove 23 corresponding to the convex ring 34. Specifically, in this embodiment, the outer shell 1 is made of stainless steel with an anti-corrosion coating. Stacked graphite blocks 2 are installed inside the outer shell 1. The medium to be cooled enters the outer shell 1 through the inlet 11 at the top and is fed into the graphite blocks 2 through the upper sealing head 3. It then flows downwards along the medium flow channel 22 through several graphite blocks 2. Cooling channels 21 are arranged radially on the graphite blocks 2, and these channels are staggered with the medium flow channel 22 to prevent contact between the coolant and the medium. The graphite blocks 2 have extremely high thermal conductivity; the coolant flowing through the cooling channels 21 carries away the heat of the medium flowing through them. The upper sealing head 3 and lower sealing head 4 are designed with funnel-shaped flow channels 32 to facilitate the collection of the medium entering and exiting the graphite blocks 2, allowing it to pass through the inlet 11 and outlet 12 of the outer shell 1. When the medium flows through the flow channel 32 between the upper sealing head 3 and the lower sealing head 4, in order to prevent the medium from leaking out from the gap between the uppermost graphite block 2 and the upper sealing head 3, and between the lowermost graphite block 2 and the lower sealing head 4, a skirt 33 is provided at the end of the flow channel 32 that contacts the graphite block 2. The skirt 33 surrounds the outer ring of the flow channel 32 and contacts the surface of the graphite block 2 to enhance the sealing between the flow channel 32 and the graphite block 2. At the same time, a convex ring 34 is provided on the end face of the flow channel 32. The convex ring 34 is fitted into the annular groove 23 of the surface graphite block 2 to enhance the sealing of the contact surfaces between the upper sealing head 3 and the lower sealing head 4 and the graphite block 2, and to prevent the medium from leaking out.

[0016] Specifically, the graphite block 2 is impregnated to improve its sealing performance and mechanical strength, and to prevent leakage.

[0017] Specifically, the inner surface of the outer shell 1 is subjected to rotational molding, and a plastic layer is applied to the inner surface of the metal outer shell 1 to form a physical barrier, effectively isolating the direct contact between corrosive media such as acids and alkalis and the metal.

[0018] like Figures 1 to 3 As shown, a gasket 5 is sandwiched between two adjacent graphite blocks 2. A flow-blocking cone 51 is provided on the gasket 5 at the location corresponding to the medium flow channel 22. The pointed end of the flow-blocking cone 51 extends into the medium flow channel 22 of the lower graphite block 2. Specifically, the flow-blocking cone 51 can reduce the flow velocity of the medium flowing in the medium flow channel 22 and create turbulence when the medium flows past the gasket 5, increasing flow resistance and thus prolonging the residence time of the medium in the medium flow channel 22.

[0019] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-sealing round block graphite heat exchanger, characterized in that: The graphite block reactor comprises a shell, a plurality of graphite blocks, an upper sealing head and a lower sealing head, the upper end of the shell is provided with a liquid inlet, the lower end of the shell is provided with a liquid outlet, the plurality of graphite blocks are stacked in the shell, the upper sealing head and the lower sealing head are arranged at the upper end and the lower end of the shell respectively, the upper sealing head is arranged below the liquid inlet, the lower sealing head is arranged above the liquid outlet, the side wall of the upper end of the shell is provided with a cooling water inlet, the side wall of the lower end of the shell is provided with a cooling water outlet, the graphite block is in the shape of a round block, the graphite block is provided with a cooling flow channel in the radial direction, the graphite block is provided with a medium flow channel in the axial direction, the cooling flow channel is used for communicating with the cooling water inlet and the cooling water outlet, the upper sealing head and the lower sealing head abut the graphite blocks of the top layer and the bottom layer respectively, the medium flow channel is used for communicating with the liquid inlet and the liquid outlet, the outer circumferential surface of the upper sealing head and the lower sealing head is provided with a first sealing ring, the upper sealing head and the lower sealing head are provided with a flow channel, the diameter of the flow channel gradually decreases towards the side away from the graphite block, the outer ring of the side abutting the graphite block of the flow channel is provided with a skirt, the end surface of the flow channel is provided with a convex ring, the end surface of the graphite block of the surface layer is provided with a ring groove corresponding to the convex ring.

2. A high-sealing graphite gasketed block heat exchanger as claimed in claim 1, wherein: The graphite block is subjected to impregnation treatment.

3. A high sealability circular block graphite heat exchanger according to claim 1, characterized in that: The inner surface of the shell is subjected to rotational molding treatment.

4. A high sealability circular block graphite heat exchanger according to claim 1, characterized in that: The spacer is clamped between the two adjacent graphite blocks, the spacer is provided with a flow resistance cone head corresponding to the medium flow channel, and the pointed part of the flow resistance cone head extends into the medium flow channel of the lower graphite block.

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