High-pressure-resistant round block type graphite heat exchanger

Abstract

The utility model relates to a high-pressure-resistant round block type graphite heat exchanger which comprises a heat exchanger body and a heat exchange block, and an upper limiting plate and a lower limiting plate which are matched with each other to limit the working position of the heat exchange block in the heat exchanger body are arranged on the top face and the bottom face of the heat exchanger body respectively. An upper connecting pipe forming a medium outflow cavity is further arranged at the end, away from the heat exchanger body, of the upper limiting plate, and a lower connecting pipe forming a cooling liquid outflow cavity is further arranged at the end, away from the heat exchanger body, of the lower limiting plate. The opening end of the upper connecting pipe and the opening end of the lower connecting pipe are both connected with flow guide connectors, a first partition plate is arranged between the upper connecting pipe and the first flow guide connector of the flow guide connectors, and a second partition plate is arranged between the lower connecting pipe and the second flow guide connector of the flow guide connectors. The pressure bearing capacity and the sealing connection stability of the graphite block can be improved, the continuous service life is prolonged, and meanwhile the heat exchange effect and the heat exchange sufficiency of liquid flow are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to graphite heat exchange equipment technical field especially relates to a kind of high-pressure-resistant round block graphite heat exchanger. BACKGROUND

[0002] Round block graphite heat exchanger is a kind of heat exchange equipment commonly used in industrial production, it uses graphite material as heat exchange medium, with excellent heat conductivity and corrosion resistance, it is composed of many circular graphite blocks, there are many small holes in each graphite block, this structure design makes heat can be more evenly conducted to the various holes of graphite block, thereby improves heat exchange efficiency. Graphite for manufacturing heat exchanger should be impermeable, commonly used impregnated impermeable graphite and profiled impermeable graphite, graphite heat exchanger has good corrosion resistance, heat transfer surface is not easy to scale, heat transfer performance is good, but graphite is easy to brittle crack, low bending and tensile strength, thus can only be used for low pressure, round block graphite heat exchanger has the advantages such as simple structure, high heat exchange efficiency, strong corrosion resistance and is mainly used for the heat exchange of corrosive medium such as hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid.

[0003] The existing graphite block is prone to damage such as cracking under high pressure for a long time, which leads to contamination of the medium and the cooling liquid, for example, the existing patent document with publication number CN221825967U discloses a high-pressure-resistant round-block-hole graphite heat exchanger, which comprises a heat exchanger shell, the inside of the heat exchanger shell is provided with a graphite block, the upper and lower ends of the graphite block are provided with clamping grooves one, the inside of the clamping groove one is provided with a double-ring sealing ring, the side of the upper and lower ends of the graphite block is provided with a clamping groove two, the inside of the clamping groove two is provided with a U-shaped sealing ring, the outer surface of the U-shaped sealing ring is fixedly installed with a protrusion, the right side of the surface of the heat exchanger shell is provided with a cooling liquid outlet, the left side of the surface of the heat exchanger shell is provided with a cooling liquid inlet, the cooling liquid inlet is provided with a filter, the inside of the filter is provided with an empty groove, the upper end of the empty groove is provided with a clamping groove three, the front and rear ends of the clamping groove three are provided with a movable groove, the upper end of the movable groove is provided with a sliding groove, the inside of the movable groove is fixedly installed with a spring, one end of the spring close to the clamping groove three is fixedly installed with a moving block, the upper end of the moving block is fixedly installed with a connecting block, the inside of the empty groove is provided with a filter plate, the upper end of the filter plate is fixedly connected with a connecting plate. The heat exchanger improves the service life and strength of the graphite block by setting the graphite block to a block-hole structure with better pressure-bearing capacity. Although the round-block-hole graphite block provided in the patent drawing has better pressure-bearing capacity than the tube-shell graphite body, the graphite body separation layer thickness of the part area between the transverse through hole for conveying the cooling liquid and the longitudinal through hole for conveying the material to be cooled is small. When the material to be cooled is in a high-pressure state and / or the flow state of the cooling liquid fluctuates, the graphite body separation layer of the thin area is prone to damage such as cracking due to high-pressure expansion force and / or liquid flow pulse, which leads to short service life of the existing round-block-hole graphite block, and the heat exchange process cannot be carried out for a long time and with high quality, and the graphite block needs to be replaced frequently, which greatly increases the use amount and processing cost of the graphite block. In addition, the interval of the part section hole cavity between the transverse through hole and the longitudinal through hole in the staggered space grid shape is large, and the heat exchange rate and effect are poor, which easily leads to uneven and insufficient heat exchange defects. Practical new type content

[0004] The utility model aims at providing a kind of high-pressure round block type graphite heat exchanger that can improve the dispersion uniformity of liquid flow, heat exchange effect and heat exchange fullness by setting the medium flow channel and the annular cooling flow channel of ring surface point array distribution, while improving the pressure-bearing capacity and sealing connection stability of graphite block by changing the relative distribution of medium flow channel and cooling flow channel and adding maintenance grid tube shell to extend the continuous working life, to solve the problem that the graphite body interlayer thickness between the transverse through hole for transporting cooling liquid and the longitudinal through hole for transporting material to be cooled is not uniform in the existing round block hole type graphite heat exchanger, the thinner area is extremely vulnerable to high-pressure expansion force and / or liquid flow pulse effect and breakage and other damage occurs, short service life and high cost, the heat exchange rate and effect of thicker area are poor, which can easily lead to uneven heat exchange and insufficient heat exchange.

[0005] The technical scheme adopted by the utility model is as follows: a high-pressure round block type graphite heat exchanger, comprising a heat exchanger main body and a heat exchange block, upper and lower limit plates capable of cooperatively limiting the working position of the heat exchange block in the heat exchanger main body are arranged on the top surface and bottom surface of the heat exchanger main body; an upper connecting pipe capable of forming a medium outflow cavity is further arranged at one end of the upper limit plate away from the heat exchanger main body, and a lower connecting pipe capable of forming a cooling liquid outflow cavity is further arranged at one end of the lower limit plate away from the heat exchanger main body; the opening ends of the upper connecting pipe and the lower connecting pipe are both connected with flow guide joints, wherein a first partition plate is arranged between the upper connecting pipe and the first flow guide joint, and a second partition plate is arranged between the lower connecting pipe and the second flow guide joint.

[0006] According to a preferred embodiment, a ring groove capable of accommodating at least part of the limit graphite gasket is opened on the end surface of the cylindrical graphite block; and the embedded connecting block is embedded in the side surface trapezoidal groove of the two stacked cylindrical graphite blocks at the same time to limit the connection state of the stacked cylindrical graphite blocks.

[0007] According to a preferred embodiment, the side surface trapezoidal grooves are annularly spaced apart on the side surface of the cylindrical graphite block, and several embedded connecting blocks are annularly spaced apart in a manner corresponding to the side surface trapezoidal grooves, wherein the embedded connecting block is formed by splicing two identical trapezoidal blocks.

[0008] According to a preferred embodiment, a first flow guide groove hole and a second flow guide groove hole are opened through the cylindrical graphite block, wherein the first flow guide groove holes are annularly spaced apart in a ring lattice distribution manner, and several second flow guide groove holes are annularly spaced apart in a manner surrounding the first flow guide groove holes; a positioning middle hole is opened on the central axis of the cylindrical graphite block.

[0009] According to a preferred embodiment, the upper limiting plate comprises an upper mounting ring plate, an upper limiting middle plate, an upper connecting pipe head and a stabilizing grid pipe shell, wherein the upper mounting ring plate is detachably mounted at the axial upper end of the heat exchanger body, and the upper limiting middle plate is centrally embedded on the plate body of the upper mounting ring plate; the upper connecting pipe head penetrating through the plate body is dot matrix embedded on the upper limiting middle plate, and the axial lower end of the upper connecting pipe head is connected with the stabilizing grid pipe shell which can be inserted into the second flow guide slot hole to assist in defining the hole cavity contour form of the second flow guide slot hole.

[0010] According to a preferred embodiment, a penetrating hole is centrally provided on the upper limiting middle plate, a graphite sealing gasket is further embedded on the lower surface of the upper limiting middle plate, and a first penetrating hole in communication with the first flow guide slot hole and uniformly distributed is further provided on the upper limiting middle plate; the stabilizing grid pipe shell is inserted in a manner of being attached to the hole inner wall of the second flow guide slot hole.

[0011] According to a preferred embodiment, the lower limiting plate comprises a lower mounting ring plate, a lower limiting middle plate, a lower connecting pipe head and a supporting positioning plug column, wherein the lower mounting ring plate is detachably mounted at the axial lower end of the heat exchanger body, and the lower limiting middle plate is centrally embedded on the plate body of the lower mounting ring plate; the lower connecting pipe head uniformly distributed with the first flow guide slot hole is inserted on the plate body of the lower limiting middle plate, and the supporting positioning plug column is further supported on the top surface of the lower limiting middle plate.

[0012] According to a preferred embodiment, the side surface of the upper connecting pipe is provided with a medium output port; and the side surface of the lower connecting pipe is provided with a cooling liquid output port.

[0013] According to a preferred embodiment, a plurality of first flow guide pipes capable of being in communication with the cooling liquid inflow cavity defined by the first flow guide joint are connected on the plate body of the first partition plate, wherein the first flow guide pipes are connected with the upper connecting pipe head in a uniformly distributed manner.

[0014] According to a preferred embodiment, a plurality of second flow guide pipes capable of being in communication with the medium inflow cavity defined by the second flow guide joint are connected on the plate body of the second partition plate, wherein the second flow guide pipes are connected with the lower connecting pipe head in a uniformly distributed manner.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The first guide groove hole and the second guide groove hole are arranged in a honeycomb-like structure and are distributed at equal intervals, and the second guide groove holes are arranged at intervals in a circumferential direction with the first guide groove hole as the center, so that the plurality of second guide groove holes effectively surround the first guide groove hole, thereby constructing a surrounding cooling flow channel, so that the cooling liquid can fully and effectively exchange heat with the medium in the first guide groove hole through the graphite partition layer, the cooling liquid is uniformly distributed and covers a large area relative to the medium, and uniform distribution of the medium and the cooling liquid in the cylindrical graphite block is achieved, and efficient heat exchange is achieved. The first guide groove hole arranged in a ring surface lattice and the second guide groove hole arranged in a surrounding manner can make the thickness of the spacer graphite body between the medium flow channel and the cooling flow channel uniform, thereby improving the structural stability, so that the entire structure has higher structural strength and stability, thereby being able to adapt to a high-pressure environment and perform heat exchange work for a long time, and the heat exchange effect is improved.

[0017] The stability grid tube shell can further assist in defining the hole cavity profile of the second guide groove hole and improving the structural strength of the cylindrical graphite block with a porous shape, so that the structural stability and pressure-bearing strength of the flow channel formed by the groove structure are higher, so as to better withstand the high-pressure expansion force and / or liquid flow pulse effect, reduce the risk of damage such as rupture of the graphite flow channel wall, reduce the replacement frequency of the cylindrical graphite block, improve the continuous working efficiency, and reduce the processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a preferred high-pressure-resistant circular block type graphite heat exchanger structure schematic diagram provided by the present application;

[0019] Figure 2 is a preferred heat exchange block plane schematic diagram of the high-pressure-resistant circular block type graphite heat exchanger provided by the present application;

[0020] Figure 3 is a preferred structure schematic diagram of the embedded connection block assembly area of the high-pressure-resistant circular block type graphite heat exchanger provided by the present application;

[0021] Figure 4 is a preferred cross-sectional schematic diagram of the upper limiting plate of the high-pressure-resistant circular block type graphite heat exchanger provided by the present application;

[0022] Figure 5 is a preferred plane schematic diagram of the upper limiting plate of the high-pressure-resistant circular block type graphite heat exchanger provided by the present application;

[0023] Figure 6 is a preferred plane schematic diagram of the stability grid tube shell of the high-pressure-resistant circular block type graphite heat exchanger provided by the present application when it is cut and spread out;

[0024] Figure 7 is a cross section schematic view of a lower limiting plate of an optimized high-pressure-resistant round-block graphite heat exchanger according to the present application;

[0025] Figure 8 is a cross section schematic view of a first partition plate and a first flow guide joint of an optimized high-pressure-resistant round-block graphite heat exchanger according to the present application;

[0026] Figure 9 is a cross section schematic view of a second partition plate and a second flow guide joint of an optimized high-pressure-resistant round-block graphite heat exchanger according to the present application;

[0027] Figure 10 is a structural schematic view of a round-block hole graphite block of an existing round-block hole graphite heat exchanger.

[0028] List of reference signs

[0029] 1: heat exchanger main body; 2: heat exchange block; 3: upper limiting plate; 4: lower limiting plate; 5: upper connecting pipe; 6: lower connecting pipe; 7: flow guide joint; 8: first partition plate; 9: second partition plate; 21: cylindrical graphite block; 22: limiting graphite gasket; 23: embedded connecting block; 211: ring groove; 212: side trapezoidal groove; 213: first flow guide groove hole; 214: second flow guide groove hole; 215: positioning center hole; 31: upper mounting ring plate; 32: upper limiting center plate; 33: upper connecting pipe head; 34: stability grid pipe shell; 321: through insertion hole; 322: upper graphite sealing gasket; 323: first through hole; 41: lower mounting ring plate; 42: lower limiting center plate; 43: lower connecting pipe head; 44: supporting and positioning insertion column; 421: lower graphite sealing gasket; 422: second through hole; 51: medium output port; 61: cooling liquid output port; 71: first flow guide joint; 72: second flow guide joint; 81: first flow guide pipe; 91: second flow guide pipe. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings structure is only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0031] The technical solutions provided by the present application will be described in detail below with reference to the drawings by way of embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In some examples, since some embodiments belong to the prior art or conventional technology, they are not described or not described in detail.

[0032] Moreover, the technical features recited herein, or the steps in all methods or processes disclosed, can be combined in any suitable manner in one or more embodiments, unless the features and / or steps are mutually exclusive. It is easy for those skilled in the art to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustration of use, and does not imply that a certain order is required, unless it is explicitly stated that a certain order is required.

[0033] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) under reasonable circumstances (not self-contradictory circumstances).

[0034] The detailed description will be made below in conjunction with the drawings.

[0035] Embodiment 1

[0036] The present application provides a high-pressure-resistant round block type graphite heat exchanger, which comprises a heat exchanger body 1, a heat exchange block 2, an upper limiting plate 3, a lower limiting plate 4, an upper connecting pipe 5, a lower connecting pipe 6, a flow guide joint 7, a first partition plate 8 and a second partition plate 9. The high-pressure-resistant round block type graphite heat exchanger provided by the present application can effectively solve the problems of the existing round block hole type graphite block as shown in Figure 10 The graphite block has a non-uniform thickness of the graphite layer, and the thinner areas are easily damaged by high-pressure expansion force and / or liquid flow pulse, and the thicker areas have poor heat exchange rate and effect, which easily leads to uneven and insufficient heat exchange.

[0037] According to the present application, the graphite block has a non-uniform thickness of the graphite layer, and the thinner areas are easily damaged by high-pressure expansion force and / or liquid flow pulse, and the thicker areas have poor heat exchange rate and effect, which easily leads to uneven and insufficient heat exchange. Figures 1-9In the shown specific embodiment, a heat exchange block 2 capable of defining a flow channel for the coolant and the medium to be in contact with each other and capable of efficiently performing heat exchange between the medium and the coolant is arranged inside the heat exchanger body 1. An upper limiting plate 3 and a lower limiting plate 4 capable of cooperatively defining the working position of the heat exchange block 2 in the heat exchanger body 1 are arranged on the top surface and the bottom surface of the heat exchanger body 1 respectively. An upper connecting pipe 5 capable of forming a medium outflow cavity is arranged on the end of the upper limiting plate 3 away from the heat exchanger body 1. A lower connecting pipe 6 capable of forming a coolant outflow cavity is arranged on the end of the lower limiting plate 4 away from the heat exchanger body 1. The opening end of the upper connecting pipe 5 away from the upper limiting plate 3 is connected with a first flow joint 71 of a flow joint 7 capable of inputting the coolant. The opening end of the lower connecting pipe 6 away from the lower limiting plate 4 is connected with a second flow joint 72 of the flow joint 7 capable of inputting the medium. A first separating plate 8 capable of separating the pipe cavity of the upper connecting pipe 5 and the flow cavity of the first flow joint 71 and guiding the input coolant is arranged between the upper connecting pipe 5 and the first flow joint 71, so that the coolant in the flow cavity of the first flow joint 71 can flow into the second flow groove hole 214 of the cylindrical graphite block 21 without contacting the medium in the pipe cavity of the upper connecting pipe 5. A second separating plate 9 capable of separating the pipe cavity of the lower connecting pipe 6 and the flow cavity of the second flow joint 72 and guiding the input medium is arranged between the lower connecting pipe 6 and the second flow joint 72, so that the medium in the flow cavity of the second flow joint 72 can flow into the first flow groove hole 213 of the cylindrical graphite block 21 without contacting the coolant in the pipe cavity of the lower connecting pipe 6. Thus, the coolant in the second flow groove hole 214 flows from top to bottom and the medium in the first flow groove hole 213 flows from bottom to top, so that the low-temperature coolant can effectively transfer the heat absorbed by the cylindrical graphite block 21, and then effectively heat transfer the gradually cooled medium to ensure the sufficiency of heat exchange.

[0038] Preferably, the heat exchange block 2 comprises cylindrical graphite blocks 21, limiting graphite gaskets 22 and embedded connecting blocks 23. Specifically, a plurality of cylindrical graphite blocks 21 are connected in a stacked manner. Further preferably, an annular groove 211 capable of accommodating at least part of the limiting graphite gasket 22 is formed on the end face of the cylindrical graphite block 21. Preferably, the embedded connecting block 23 is simultaneously embedded in the side trapezoidal groove 212 of the two stacked cylindrical graphite blocks 21 in communication with each other to define the connection state of the stacked cylindrical graphite blocks 21. Preferably, the side trapezoidal groove 212 is circumferentially spaced apart on the side face of the cylindrical graphite block 21. Further preferably, a plurality of embedded connecting blocks 23 are circumferentially spaced apart in a manner corresponding to the side trapezoidal groove 212. Specifically, the embedded connecting block 23 is formed by splicing two identical trapezoidal blocks symmetrically along the abutting faces thereof. The present application limits the stacked coaxial state of the two cylindrical graphite blocks 21 by providing the limiting graphite gasket 22, avoids the problems of misalignment of the stacked cylindrical graphite blocks 21 and ensures the alignment accuracy and accuracy of the internal grooves of the cylindrical graphite blocks 21, so that the consistency of the groove cross-sectional size allows the cooling liquid and medium to flow smoothly and ensures the minimum flow rate. The embedded connecting block 23 provided by the present application can ensure the stability of the connection of the two cylindrical graphite blocks 21 by clamping on the side face of the two cylindrical graphite blocks 21, so that the plurality of cylindrical graphite blocks 21 can be pre-assembled and connected and then placed into the accommodating lumen defined by the heat exchanger body 1, thereby ensuring accurate abutment. The embedded connecting block 23 provided by the present application can limit the movement of the two cylindrical graphite blocks 21 away from each other by clamping and limiting, thereby ensuring the stability of the stacking, thereby avoiding the impact of the cooling liquid and medium on the cylindrical graphite blocks 21 due to the fluctuation of the flow rate and the liquid pressure of the cooling liquid and medium during directional flow, causing the cylindrical graphite blocks 21 to separate and abut, resulting in abutment failure, gaps between the cylindrical graphite blocks 21, ensuring the stability of the stacking and the abutment tightness between the cylindrical graphite blocks 21, thereby ensuring the isolation state of the first and second flow guide grooves 213 and 214, avoiding the risk of contamination of the cooling liquid and medium due to the gaps between the cylindrical graphite blocks 21.

[0039] Preferably, the first flow guide groove holes 213 and the second flow guide groove holes 214 are arranged through the cylindrical graphite block 21. Preferably, the first flow guide groove holes 213 are arranged in a ring lattice distribution. Further preferably, the second flow guide groove holes 214 are arranged in a ring distribution around the first flow guide groove holes 213. Specifically, the ring lattice distribution refers to the same circumferential line in a circular surface or ring surface is arranged at equal intervals in the radial direction to form a plurality of circumferential profiles with spacing and the same center. Preferably, the positioning middle hole 215 is arranged on the central axis of the cylindrical graphite block 21 to assist in defining the stacking alignment accuracy. Preferably, the limiting graphite gasket 22 can cooperate with the support positioning column inserted in the positioning middle hole 215 to prevent relative misalignment and sliding between the cylindrical graphite blocks 21. Preferably, the first flow guide groove holes 213 are used for medium flow guide. Preferably, the second flow guide groove holes 214 are used for cooling liquid flow guide. The first flow guide groove holes 213 and the second flow guide groove holes 214 arranged in the application are arranged in a honeycomb-like structure, and the same groove holes are arranged at equal intervals. In particular, the second flow guide groove holes 214 are arranged in a circumferential interval around the first flow guide groove holes 213, so that the plurality of second flow guide groove holes 214 effectively surround the first flow guide groove holes 213, thereby constructing a ring cooling flow channel, so as to ensure that the cooling liquid can fully and effectively exchange heat with the medium in the first flow guide groove holes 213 through the graphite layer, so that the cooling liquid is uniformly distributed and covers a large area relative to the medium, and the medium and the cooling liquid are uniformly distributed in the cylindrical graphite block 21 to efficiently exchange heat. The ring lattice distribution of the first flow guide groove holes 213 and the ring distribution of the second flow guide groove holes 214 arranged in the application can make the thickness of the spacer graphite body between the medium flow channel and the cooling flow channel uniform, thereby improving the structural stability, so that the entire structure has higher structural strength and stability, thereby being able to adapt to high-pressure environment and perform heat exchange work for a long time, thereby improving the heat exchange effect.

[0040] Preferably, the upper limiting plate 3 comprises an upper mounting ring plate 31, an upper limiting middle plate 32, an upper connecting pipe head 33 and a stabilizing grid pipe shell 34. Preferably, the upper mounting ring plate 31 is detachably mounted at the axial upper end of the heat exchanger main body 1. Further preferably, the upper limiting middle plate 32 capable of partially inserting into the heat exchanger main body 1 to define the working position of the heat exchange block 2 is centrally embedded on the plate body of the upper mounting ring plate 31. Preferably, the upper connecting pipe head 33 capable of penetrating through the plate body of the upper limiting middle plate 32 is dot matrix embedded on the upper limiting middle plate 32. Preferably, the stabilizing grid pipe shell 34 capable of being inserted into the second flow guide groove hole 214 to assist in defining the hole cavity contour form of the second flow guide groove hole 214 and improving the structural strength of the porous cylindrical graphite block 21 is connected to the axial lower end of the upper connecting pipe head 33. Preferably, a plurality of through screw holes are circumferentially spaced apart on the upper mounting ring plate 31. Preferably, the upper mounting ring plate 31 and the upper limiting middle plate 32 are integrally formed by casting, so that they can form an integral whole. Preferably, the second flow guide groove hole 214, the upper connecting pipe head 33 and the stabilizing grid pipe shell 34 are dot matrix distributed, so that the stabilizing grid pipe shell 34 is inserted into the second flow guide groove hole 214 in a one-to-one corresponding manner to assist in defining the groove hole inner cavity contour form of the second flow guide groove hole 214, and the upper connecting pipe head 33 can guide the cooling liquid into the second flow guide groove hole 214 to carry away the heat of the cylindrical graphite block 21. Preferably, the stabilizing grid pipe shell 34 is a tubular shell wall structure formed by rolling a metal plate with a hollow grid made of an alloy material such as aluminum alloy, copper alloy or the like with high thermal conductivity and structural strength. It can support and limit the hole cavity shape of the second flow guide groove hole 214 to ensure the stability of its hole cavity form, while fully exposing the graphite body groove inner wall and directly contacting with the cooling liquid to ensure the heat exchange efficiency and effect. The stabilizing grid pipe shell 34 provided in the present application can further assist in defining the hole cavity contour form of the second flow guide groove hole 214 and improving the structural strength of the porous cylindrical graphite block 21, so that the structural stability and pressure-bearing strength of the flow channel formed by the groove structure are higher, so as to better withstand the high-pressure expansion force and / or liquid flow pulse effect, reduce the risk of damage such as rupture of the graphite body flow channel wall, reduce the replacement frequency of the cylindrical graphite block 21, improve the continuous working efficiency, and reduce the processing cost.

[0041] Preferably, a through insertion hole 321 capable of accommodating the support positioning insertion column 44 is centrally provided on the upper limiting middle plate 32. Preferably, the lower surface of the upper limiting middle plate 32 is further dot matrix embedded with an upper graphite sealing gasket 322 capable of filling the abutting gap between the upper limiting middle plate 32 and the cylindrical graphite block 21. Preferably, a first through hole 323 in communication with the first flow guide groove hole 213 is further provided on the upper limiting middle plate 32. Specifically, the stabilizing grid pipe shell 34 is inserted in a manner of adhering to the inner wall of the second flow guide groove hole 214.

[0042] Preferably, the lower limiting plate 4 comprises a lower mounting ring plate 41, a lower limiting middle plate 42, a lower connecting pipe head 43 and a supporting positioning plug 44. Preferably, the lower mounting ring plate 41 is detachably mounted at the axial lower end of the heat exchanger body 1. Preferably, the lower limiting middle plate 42 is centrally embedded on the plate body of the lower mounting ring plate 41 and can be partially inserted into the heat exchanger body 1 to define the working position of the heat exchange block 2. Further preferably, the lower connecting pipe head 43 is inserted on the plate body of the lower limiting middle plate 42 and is distributed with the first flow guide groove hole 213 to be able to be connected and communicated with the first flow guide groove hole 213. Preferably, the top surface of the lower limiting middle plate 42 also supports the supporting positioning plug 44 which can be inserted into the coaxial positioning middle hole 215 and the through insertion hole 321. Preferably, the axial upper end of the supporting positioning plug 44 penetrates the through insertion hole 321 and is connected with the nut, thereby defining the relative position relationship of the heat exchange block 2, the upper limiting plate 3 and the lower limiting plate 4. Preferably, the upper surface of the lower limiting middle plate 42 also embeds the lower graphite sealing washer 421 which can fill the abutting gap between it and the cylindrical graphite block 21. Preferably, the second through hole 422 which is in communication with the second flow guide groove hole 214 is also provided on the lower limiting middle plate 42. The supporting positioning plug 44 provided in the application can assist in calibrating and defining the alignment accuracy of the plurality of stacked cylindrical graphite blocks 21 to ensure the stability of the structure.

[0043] Preferably, the upper limiting plate 3 and the upper connecting pipe 5 can be manufactured by welding or integral forming and the like fixed connection mode. Preferably, the lower limiting plate 4 and the lower connecting pipe 6 can also be manufactured by welding or integral forming and the like fixed connection mode. Preferably, the side surface of the upper connecting pipe 5 is provided with a medium output port 51. Preferably, the side surface of the lower connecting pipe 6 is provided with a cooling liquid output port 61.

[0044] Preferably, a plurality of first flow guide pipes 81 capable of communicating with the cooling liquid inflow cavity defined by the first flow guide joint 71 are connected to the plate body of the first partition plate 8. Further preferably, the first flow guide pipes 81 are connected to the upper connection pipe joint 33 in a manner that directs the delivery of the cooling liquid in a manner that is distributed with the upper connection pipe joint 33 and separated from the medium. Preferably, a plurality of second flow guide pipes 91 capable of communicating with the medium inflow cavity defined by the second flow guide joint 72 are connected to the plate body of the second partition plate 9. Further preferably, the second flow guide pipes 91 are connected to the lower connection pipe joint 43 in a manner that directs the delivery of the medium in a manner that is distributed with the lower connection pipe joint 43 and separated from the cooling liquid. The present application enables the cooling liquid and the medium to be input into the device in a straight-through flow channel without turning by setting the first flow guide joint 71 and the second flow guide joint 72 as the cooling liquid direct flow input port and the medium direct flow input port, respectively, reduces the obstruction of the input liquid flow caused by the bending structure, effectively maintains the inflow rate and strength of the input liquid flow, so that the medium and the cooling liquid can flow more powerfully to complete heat exchange. In addition, the present application enables the temperature state conducted by the cooling liquid flowing from top to bottom and the medium flowing from bottom to top to form a staggered confrontation in space by setting the cooling liquid as top input and the medium as bottom input, thereby improving the heat exchange effect. The cooling liquid flowing downward can flow more quickly and smoothly under the action of its own gravity and has a higher flow rate under the same pressure, so that it can transfer heat more fully and effectively, avoiding the problem of poor cooling effect caused by the stagnation of the cooling liquid. Moreover, the cooling liquid flowing downward can also exchange heat more fully and effectively with the medium that has completed a certain degree of heat exchange in a lower temperature state, so that the cooling liquid can always maintain a large enough temperature difference with the medium in the same region to ensure the heat exchange efficiency and quality.

[0045] The medium of the present application includes, but is not limited to, high-temperature and high-pressure acid liquids such as hydrochloric acid, sulfuric acid, acetic acid, and phosphoric acid.

[0046] The utility model is not limited to the above optional implementation, anyone can draw other various forms of products under the enlightenment of the utility model, but regardless of any change in its shape or structure, any technical solution falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are illustrative and not limiting on the claims. The protection scope of the utility model is defined by the claims and their equivalents. In the full text, the features guided by "preferably" are only optional, and should not be understood as necessarily provided, so the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A high-pressure-resistant circular block graphite heat exchanger, comprising a heat exchanger body (1) and a heat exchange block (2), characterized in that, upper and lower limit plates (3) and (4) are arranged on the top and bottom surfaces of the heat exchanger body (1) respectively, which can cooperatively define the working position of the heat exchange block (2) in the heat exchanger body (1); an upper connecting pipe (5) capable of forming a medium outflow cavity is further arranged at the end of the upper limit plate (3) away from the heat exchanger body (1), and a lower connecting pipe (6) capable of forming a cooling liquid outflow cavity is further arranged at the end of the lower limit plate (4) away from the heat exchanger body (1); the opening ends of the upper and lower connecting pipes (5) and (6) are connected with flow guide joints (7), wherein a first partition plate (8) is arranged between the upper connecting pipe (5) and a first flow guide joint (71) of the flow guide joint (7), and a second partition plate (9) is arranged between the lower connecting pipe (6) and a second flow guide joint (72).

2. The high pressure resistant graphite gasketed heat exchanger of claim 1, wherein, The heat exchange block (2) comprises cylindrical graphite blocks (21), limiting graphite gaskets (22) and embedded connecting blocks (23), wherein, a plurality of cylindrical graphite blocks (21) are connected in a stacked manner, and a ring groove (211) capable of accommodating at least part of the limiting graphite gasket (22) is formed on the end surface of the cylindrical graphite block (21); the embedded connecting block (23) is simultaneously embedded in the side trapezoidal grooves (212) of the two stacked cylindrical graphite blocks (21) that are in communication with each other, so as to define the connection state of the stacked cylindrical graphite blocks (21).

3. The high pressure resistant graphite gasketed heat exchanger of claim 2, wherein, The side trapezoidal grooves (212) are circumferentially spaced apart on the side surface of the cylindrical graphite block (21), and a plurality of embedded connecting blocks (23) are circumferentially spaced apart in a manner corresponding to the side trapezoidal grooves (212), wherein, the embedded connecting block (23) is formed by splicing two identical trapezoidal blocks.

4. The high pressure resistant graphite gasketed heat exchanger of claim 3, wherein, A first flow guide groove hole (213) and a second flow guide groove hole (214) are formed through the cylindrical graphite block (21), wherein the first flow guide groove holes (213) are circumferentially distributed in a dot matrix manner, and a plurality of second flow guide groove holes (214) are circumferentially spaced apart around the first flow guide groove holes (213); a positioning middle hole (215) is formed on the central axis of the cylindrical graphite block (21).

5. The high pressure resistant graphite gasketed heat exchanger of claim 4, wherein, The upper limit plate (3) comprises an upper mounting ring plate (31), an upper limiting middle plate (32), an upper connecting pipe head (33) and a stability grid pipe shell (34), wherein, the upper mounting ring plate (31) is detachably mounted on the axial upper end of the heat exchanger body (1), and the upper limiting middle plate (32) is centrally embedded on the plate body of the upper mounting ring plate (31); the upper connecting pipe head (33) is dot matrix embedded on the upper limiting middle plate (32) and penetrates the plate body thereof, and the axial lower end of the upper connecting pipe head (33) is connected with the stability grid pipe shell (34) capable of being inserted into the second flow guide groove hole (214) to assist in defining the cavity contour form of the second flow guide groove hole (214).

6. The high pressure resistant graphite gasketed heat exchanger of claim 5, wherein, A through hole (321) is centrally formed on the upper limiting middle plate (32), and a graphite sealing gasket (322) is embedded on the lower surface of the upper limiting middle plate (32), and a first through hole (323) is formed on the upper limiting middle plate (32) and is in communication with the first flow guide groove hole (213) and is uniformly distributed. The stability grid tube shell (34) is inserted in a manner of being attached to the inner wall of the hole of the second flow guide groove hole (214).

7. The high pressure resistant graphite gasketed heat exchanger of claim 6, wherein, The lower limiting plate (4) comprises a lower mounting ring plate (41), a lower limiting middle plate (42), a lower connecting pipe head (43) and a support positioning plug column (44), wherein, The lower mounting ring plate (41) is detachably mounted on the axial lower end of the heat exchanger main body (1), and the lower limiting middle plate (42) is centrally embedded on the plate body of the lower mounting ring plate (41); The lower connecting pipe head (43) is inserted on the plate body of the lower limiting middle plate (42) and is uniformly distributed with the first flow guide groove hole (213), and the top surface of the lower limiting middle plate (42) further supports the support positioning plug column (44).

8. The high pressure resistant graphite gasketed heat exchanger of claim 7, wherein, The side surface of the upper connecting pipe (5) is provided with a medium output port (51). The side surface of the lower connecting pipe (6) is provided with a cooling liquid output port (61).

9. The high pressure resistant graphite gasketed heat exchanger of claim 8, wherein, A plurality of first flow guide pipes (81) capable of communicating with the cooling liquid inflow cavity defined by the first flow guide joint (71) are connected to the plate body of the first partition plate (8), wherein the first flow guide pipes (81) are connected to the upper connecting pipe head (33) in a uniformly distributed manner.

10. The high pressure resistant graphite gasketed heat exchanger of claim 9, wherein, A plurality of second flow guide pipes (91) capable of communicating with the medium inflow cavity defined by the second flow guide joint (72) are connected to the plate body of the second partition plate (9), wherein the second flow guide pipes (91) are connected to the lower connecting pipe head (43) in a uniformly distributed manner.

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