Graphite sulfuric acid diluting and cooling device

Abstract

The utility model relates to a graphite sulfuric acid diluting and cooling device which comprises a cooling shell containing a plurality of graphite round blocks installed in a stacked mode, and sealing pieces capable of limiting the positions of the graphite round blocks in a shell cavity are arranged at the two ends of the cooling shell. The axial upper end of the cooling shell is provided with a mixing and diluting assembly which is communicated with the vertical medium flow hole of the graphite round block through the flow guide hole of the sealing piece; the radial outer side of the mixing and diluting assembly is further sleeved with a pre-cooling shell which is in butt joint with the cooling shell and forms a pre-cooling annular cavity flow channel; coaxial partition tube plates are arranged at intervals in the radial direction of the cross section of a cylindrical shell cavity of a mixing shell of the mixing and diluting assembly in the mode that an annular snakelike flow guide gap is constructed in the cylindrical shell cavity of the mixing shell. According to the device, the dilution mixing quality and uniformity can be improved, and meanwhile, primary heat transfer is carried out in the dilution process, so that the heat required to be transferred and the heat transfer comprehensive efficiency required by subsequent cooling treatment are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of sulfuric acid dilution and cooling equipment, and in particular to a graphite sulfuric acid dilution and cooling device. Background Technology

[0002] Sulfuric acid is an important industrial raw material used in the manufacture of fertilizers, pharmaceuticals, explosives, pigments, detergents, and batteries. It is also widely used in petroleum purification, metal smelting, and dye industries. Commonly used as a chemical reagent, it serves as a dehydrating agent and sulfonating agent in organic synthesis. In the chemical industry, graphite coolers are used in the dilution of sulfuric acid, and existing graphite coolers can achieve uniform heat dissipation. However, when concentrated sulfuric acid is diluted, a large amount of heat is released when sulfuric acid molecules combine with water molecules to form hydrated molecules. The reasons for the exothermic effect of concentrated sulfuric acid dilution are as follows: When concentrated sulfuric acid dissolves in water, sulfuric acid molecules overcome intermolecular forces and disperse into the solvent (water) molecules—this is an endothermic physical process. The combination of sulfuric acid molecules and water to form hydrated sulfuric acid is an exothermic chemical process. Because the heat released is greater than the heat absorbed, it is considered exothermic.

[0003] Existing dilution and cooling equipment typically separates the dilution and cooling processes into two stages. However, the dilution structure often suffers from poor mixing and uniformity. For example, patent document CN213253878U discloses a graphite sulfuric acid dilution cooler, comprising a graphite cooling body composed of graphite heat exchange blocks. The upper end of the cooling body has a cap, a liquid collection pipe in the middle, a primary mixing chamber at the bottom, and a secondary mixing chamber below the primary mixing chamber. The lower part of the graphite cooling body is a heat exchanger. This patent, with its primary and secondary mixing chambers, relies primarily on the liquid flow force generated by the liquid passing through a filter screen to accelerate the flow and diffusion of substances. However, this structure cannot adequately and frequently agitate the sulfuric acid and diluent, resulting in poor uniformity and mixing, and failing to guarantee the uniformity of the diluted sulfuric acid concentration. Furthermore, existing graphite coolers have limited heat dissipation capacity, especially as the dilution process further increases the temperature of the sulfuric acid medium, preventing the graphite cooling structure from fully transferring heat to the diluted sulfuric acid. This limits the dilution efficiency of the pre-dilution structure. Utility Model Content

[0004] The purpose of this invention is to provide a graphite sulfuric acid dilution and cooling device that can improve the quality and uniformity of dilution and mixing, while performing initial heat transfer during the dilution process to reduce the amount of heat to be transferred in subsequent cooling treatment and improve the overall efficiency of heat transfer. This addresses the problems of poor uniformity of dilution and mixing, poor dilution effect and quality, and increased overall reaction heat of sulfuric acid during dilution, which prevents the graphite cooling structure from fully and efficiently transferring heat and thus limiting the overall processing efficiency.

[0005] The technical solution adopted by this utility model is as follows: a graphite sulfuric acid dilution and cooling device, comprising a cooling shell containing a plurality of stacked graphite spheres, and sealing elements at both ends of the cooling shell that can limit the position of the graphite spheres in the shell cavity; a mixing and dilution assembly is provided at the axial upper end of the cooling shell, which communicates with the vertical medium flow hole of the graphite spheres through the flow guide hole of the sealing element; a pre-cooling shell is also sleeved on the radial outer side of the mixing and dilution assembly, which is opposite to the cooling shell and forms a pre-cooling annular cavity flow channel; the mixing shell of the mixing and dilution assembly is provided with coaxial partition plates arranged radially at intervals along the cross-section of the cylindrical shell cavity in a manner that constructs an annular serpentine flow guide gap in its cylindrical shell cavity.

[0006] According to a preferred embodiment, a plurality of the partition tube sheets are arranged in an alternating manner on the inner top and inner bottom surfaces of the mixing shell to create a plurality of interconnected and coaxial annular gaps in the mixing shell, thereby forming flow guide gaps for the sulfuric acid medium to flow along a serpentine path.

[0007] According to a preferred embodiment, a diversion strip is further arranged circumferentially between two adjacent partition tube plates to divide the gap between the ring bodies. The diversion strips in the gap between two adjacent ring bodies are staggered in that they are located on different cross-sectional radius lines. The diversion strips are simultaneously attached to the opposing side plates of the two adjacent partition tube plates in a manner that is set as an arc-shaped spindle plate.

[0008] According to a preferred embodiment, a supply pipe shell capable of supplying diluent into its cavity in a dot matrix manner and a sulfuric acid medium input pipe passing through the supply pipe shell and coaxially communicating with the mixing shell are provided on the top surface of the mixing shell.

[0009] According to a preferred embodiment, the liquid supply pipe shell comprises a cylindrical shell, an inlet, and a one-way outlet, wherein the sulfuric acid medium input pipe penetrates the cylindrical shell in a manner that separates it from the shell cavity of the cylindrical shell; the inlet for inputting diluent is provided on the top surface of the cylindrical shell, and the one-way outlet is provided on the bottom surface of the cylindrical shell with a staggered distribution of points on the annular surface.

[0010] According to a preferred embodiment, the lower axial end of the mixing shell is further provided with a flow guide tube shell that communicates with the flow guide hole, wherein a turbulence spiral plate capable of limiting the flow of diluted sulfuric acid medium along a spiral path is provided inside the cavity of the flow guide tube shell.

[0011] According to a preferred embodiment, the precooling shell has a first coolant inlet and a first coolant outlet on both sides of the shell, and the side wall of the mixing shell is also fitted with a semiconductor heat exchanger that can accelerate heat transfer.

[0012] According to a preferred embodiment, the lower axial end of the cooling shell is further provided with a bottom end cap, and the bottom end cap is provided with an output port.

[0013] According to a preferred embodiment, a second coolant inlet and a second coolant outlet are also inserted into the side of the cooling shell.

[0014] According to a preferred embodiment, a baffle plate is further provided between two adjacent graphite blocks to define the stacked connection state of the two and to divide the cooling gap into a serpentine flow channel.

[0015] The beneficial effects of this utility model are:

[0016] The mixing and dilution assembly described in this application improves the uniformity and quality of dilution mixing by continuously changing the state of the sulfuric acid medium's liquid flow and adding diluent in multiple stages and batches. Furthermore, the assembly periodically changes the flow's separation and convergence to continuously agitate the sulfuric acid medium's liquid flow, further enhancing the uniformity and effectiveness of dispersion and mixing. The multi-stage mixing agitation structure ensures uniform mixing and concentration consistency, improving the dilution effect. The pre-cooling shell described in this application performs preliminary heat transfer on the sulfuric acid medium diluted by the mixing and dilution assembly, reducing its heat content. This reduces the heat transfer required by the graphite cooling structure, increasing its cooling efficiency for the diluted sulfuric acid medium. It also removes the limitation of the graphite cooling structure on the equipment's processing capacity, improving the overall dilution cooling capacity and overall processing efficiency.

[0017] The mixing shell in this application can periodically divert and converge the sulfuric acid medium as it flows along a serpentine path, causing the liquid flow in the same area to split and the liquid flow in different areas to converge. This achieves dispersion and mixing of substances in different areas of the liquid flow, improving the overall mixing uniformity. Furthermore, the mixing shell continuously changes the real-time flow velocity of the liquid flow by continuously changing the cross-sectional size of the flow channel, thus continuously and uninterruptedly disturbing the sulfuric acid medium flow, improving the dispersion and mixing of the sulfuric acid medium and the diluent, and enhancing mixing efficiency and quality. The liquid supply shell in this application can dilute the sulfuric acid medium in multiple stages by injecting diluent at multiple points along the flow path, improving the dilution effect of the sulfuric acid medium while ensuring the uniformity of dilution mixing and initial dispersion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred graphite sulfuric acid dilution and cooling device proposed in this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the mixing shell of a preferred graphite sulfuric acid dilution and cooling device proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the unfolded plan of the partition plate of a preferred graphite sulfuric acid dilution and cooling device proposed in this utility model.

[0021] List of reference numerals

[0022] 1: Graphite block; 2: Cooling shell; 3: Seal; 4: Mixing and dilution assembly; 5: Pre-cooling shell; 11: Vertical medium flow hole; 12: Horizontal coolant flow hole; 13: Baffle ring plate; 21: Bottom end cap; 22: Second coolant inlet; 23: Second coolant outlet; 211: Output port; 31: Guide hole; 41: Mixing shell; 42: Supply pipe shell; 43: Sulfuric acid medium input pipe; 44: Guide pipe shell; 411: Separator plate; 412: Flow divider; 421: Cylindrical shell; 422: Inlet pipe; 423: One-way drain pipe; 441: Turbulent spiral plate; 51: First coolant inlet; 52: First coolant outlet; 53: Semiconductor heat exchanger. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail.

[0025] Furthermore, the technical features described herein, or the steps in all the methods or processes disclosed herein, may be combined in any suitable manner in one or more embodiments, except for mutually exclusive features and / or steps. It will be readily understood by those skilled in the art that the order of steps or operations of the methods relating to the embodiments provided herein may also be altered. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a particular order unless explicitly stated otherwise.

[0026] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, under reasonable circumstances (without self-contradiction), include both direct and indirect connections (linkages).

[0027] The following is a detailed explanation with reference to the accompanying drawings.

[0028] Example 1

[0029] This application provides a graphite sulfuric acid dilution and cooling device, which includes a graphite block 1, a cooling shell 2, a sealing element 3, a mixing and dilution assembly 4, and a pre-cooling shell 5.

[0030] according to Figure 1-3In one specific embodiment, several stacked graphite discs 1, which isolate the medium from the coolant but allow for heat transfer, are contained within a cooling shell 2. Sealing elements 3 are provided at both ends of the cooling shell 2 to define the position of the graphite discs 1 within the shell cavity. A mixing and dilution assembly 4 is provided at the axial upper end of the cooling shell 2, communicating with the vertical medium flow holes 11 of the graphite discs 1 through the guide holes 31 of the sealing elements 3. A pre-cooling shell 5, which is connected to the cooling shell 2 and forms a pre-cooling annular cavity flow channel, is also fitted radially outward of the mixing and dilution assembly 4. The mixing and dilution assembly 4 provided in this application can improve the uniformity and quality of dilution mixing by continuously changing the state of the liquid flow formed by the sulfuric acid medium and adding diluent in multiple stages and batches. Furthermore, the mixing and dilution assembly 4 can periodically change the separation and combination state of the liquid flow to continuously disturb the liquid flow formed by the sulfuric acid medium, further improving the uniformity and effect of dispersion mixing. The multi-stage mixing disturbance structure can ensure the uniformity of mixing and the consistency of concentration, thereby improving the dilution effect. The pre-cooling shell 5 provided in this application can perform preliminary heat transfer on the sulfuric acid medium diluted by the mixing and dilution component 4 to reduce its heat content, reduce the heat that the graphite cooling structure needs to transfer and improve its cooling efficiency on the diluted sulfuric acid medium, remove the limitation of the graphite cooling structure on the equipment's processing capacity, and improve the overall dilution cooling capacity and overall processing efficiency.

[0031] Preferably, the graphite discs 1 are provided with non-communicating vertical medium flow holes 11 and horizontal coolant flow holes 12 in a spatially staggered manner, thereby transferring the heat diffused by the medium in the vertical medium flow holes 11 through the coolant in the horizontal coolant flow holes 12. Preferably, a baffle plate 13 is also provided between two adjacent graphite discs 1 to limit their stacked connection state and divide the cooling gap into a serpentine flow path. The baffle plate 13 can define the cooling gap between the graphite discs 1 and the cooling shell 2 into a serpentine flow path, so that the coolant can flow sequentially through the horizontal coolant flow holes 12 of the stacked graphite discs 1 along the serpentine flow path.

[0032] Preferably, a bottom end cap 21 is also provided at the lower axial end of the cooling shell 2. More preferably, an output port 211 for discharging the diluted and cooled sulfuric acid medium is provided on the bottom end cap 21. Preferably, a second coolant inlet 22 and a second coolant outlet 23 are also inserted into the side of the cooling shell 2. Specifically, the second coolant inlet 22 is connected to the second coolant outlet 23 through the cooling gap between the cooling shell 2 and the graphite block 1 and through the transverse coolant flow hole 12 in the graphite block 1. More preferably, the second coolant inlet 22 and the first coolant inlet 51 are connected to the supply outlet of an external coolant circulation device through a branched delivery pipe, and the second coolant outlet 23 and the first coolant outlet 52 are also connected to the recovery inlet of the external coolant circulation device through a branched delivery pipe, so as to form a circulation loop to continuously transfer heat, thereby ensuring the heat transfer effect.

[0033] Preferably, the mixing and dilution assembly 4 includes a mixing shell 41, a supply pipe shell 42, a sulfuric acid medium input pipe 43, and a guide pipe shell 44. Preferably, the top surface of the mixing shell 41 is provided with a supply pipe shell 42 capable of supplying diluent into its cavity in a dot-matrix manner, and a sulfuric acid medium input pipe 43 passing through the supply pipe shell 42 and coaxially connected to the mixing shell 41. Coaxial connection means that the sulfuric acid medium input pipe 43 passes through the supply pipe shell 42 coaxially with the mixing shell 41, and its lower end is connected to the mixing shell 41. Preferably, the lower axial end of the mixing shell 41 is also provided with a guide pipe shell 44 connected to the guide hole 31. The mixing shell 41 provided in this application can periodically divert and converge the liquid flow of the sulfuric acid medium as it flows along a serpentine path, causing the liquid flow in the same area to diverge and the liquid flow in different areas to converge. This achieves dispersion and mixing of substances in different areas of the liquid flow, thereby improving the overall mixing uniformity. Furthermore, the mixing shell 41 continuously changes the real-time flow velocity of the liquid flow by continuously changing the cross-sectional size of the flow channel, thereby continuously and uninterruptedly disturbing the sulfuric acid medium liquid flow, improving the dispersion and mixing of the sulfuric acid medium and the diluent, and improving mixing efficiency and quality. The liquid supply pipe shell 42 provided in this application can dilute the sulfuric acid medium in multiple stages by injecting diluent at multiple points along the flow path, thereby improving the dilution effect and controllability of the dilution concentration, and achieving effective control of the dilution concentration while ensuring the uniformity of dilution and mixing.

[0034] Preferably, the mixing shell 41 has coaxial partition plates 411 arranged radially at intervals along the cross-section of the cylindrical shell cavity, forming annular serpentine flow guide gaps within its cylindrical shell cavity. More preferably, the multiple partition plates 411 are arranged in a staggered manner on the inner top and bottom surfaces of the mixing shell 41 to create multiple interconnected and coaxial annular gaps within the mixing shell 41, thereby forming flow guide gaps for the sulfuric acid medium to flow along a serpentine path. Preferably, flow dividers 412 are also arranged circumferentially at intervals between adjacent partition plates 411 to separate the annular gaps. More preferably, the flow dividers 412 in adjacent annular gaps are staggered in that they are located on different cross-sectional radii to multiplely divide the sulfuric acid medium and accelerate the mixing of the sulfuric acid medium and the diluent. Specifically, the flow dividers 412 are simultaneously attached to the opposing side surfaces of two adjacent partition plates 411 in a manner configured as arc-shaped spindle plates. Specifically, the diverting strips 412 in the multiple sets of adjacent annular gaps defined by the several partition tube plates 411 in the mixing shell 41 are arranged in a staggered manner to divert the medium liquid flow in the annular serpentine flow guide gap defined by the partition tube plates 411 multiple times, thereby continuously changing the flow state of the medium liquid flow, thus accelerating the mixing efficiency of sulfuric acid medium and diluent and improving the mixing uniformity.

[0035] Preferably, the supply pipe shell 42 comprises a cylindrical shell 421, an inlet 422, and a one-way outlet 423. Preferably, the sulfuric acid medium input pipe 43 penetrates the cylindrical shell 421 in a manner separate from the shell cavity of the cylindrical shell 421. Preferably, the inlet 422 for inputting diluent is provided on the top surface of the cylindrical shell 421. More preferably, a one-way outlet 423 with a staggered annular distribution is provided on the bottom surface of the cylindrical shell 421. Preferably, a one-way valve limiting the one-way discharge of diluent is provided in the cavity of the one-way outlet 423. Preferably, the dot-matrix supply of the supply pipe shell 42 means that the one-way outlet 423 is inserted into the mixing shell 41 in a dot-matrix distribution. More preferably, the staggered annular distribution means that multiple sets of one-way outlets 423 on adjacent circumferences are not on the same circumference, thereby avoiding excessive concentration of diluent due to the injection center always being in the same area of ​​the liquid flow. This application utilizes a dot-matrix arrangement of unidirectional drain ports 423 to allow the diluent to be mixed into the sulfuric acid medium at multiple points and in stages, thereby improving mixing efficiency and dispersion, and accelerating the uniform mixing speed of the two. Preferably, the unidirectional drain ports 423 are located on the annular surface of the upward-flowing sulfuric acid medium within the mixing shell 41, so that the diluent can counteract the sulfuric acid medium, thereby improving the mixing efficiency and dispersion of the sulfuric acid medium and the diluent.

[0036] Preferably, a flow-deterrent spiral plate 441 is provided inside the cavity of the guide tube shell 44 to limit the flow of the diluted sulfuric acid medium along a spiral path. The flow-deterrent spiral plate 441 provided in this application can continuously change the flow state of the sulfuric acid medium after the diluent has been added and combined, thereby accelerating the movement of sulfuric acid molecules in the diluent, promoting more effective and thorough mixing of sulfuric acid and diluent, improving the mixing uniformity of the diluted sulfuric acid medium, and solving the defect of concentration distribution deviation.

[0037] Preferably, the precooling shell 5 has a first coolant inlet 51 and a first coolant outlet 52 on both sides, and the side wall of the mixing shell 41 is also embedded with a semiconductor heat exchanger 53 that can accelerate heat transfer. The semiconductor heat exchanger 53 can continuously absorb heat from the diluted sulfuric acid medium through active heat transfer, thereby reducing the temperature of the diluted sulfuric acid medium and improving the speed and efficiency of subsequent graphite cooling. The heat-absorbing end of the semiconductor heat exchanger 53 continuously absorbs heat from the sulfuric acid medium and actively transfers the absorbed heat to the coolant flowing inside the precooling shell 5, thereby accelerating the cooling speed and improving the cooling effect, reducing the heat that needs to be transferred for subsequent graphite cooling, improving its cooling efficiency, and thus improving the overall cooling capacity.

[0038] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A graphite sulfuric acid dilution and cooling device, comprising a cooling shell (2) containing a plurality of stacked graphite discs (1), and wherein both ends of the cooling shell (2) are provided with seals (3) capable of defining the position of the graphite discs (1) within the shell cavity, characterized in that, The cooling shell (2) is provided with a mixing and dilution assembly (4) that is connected to the vertical medium flow hole (11) of the graphite block (1) through the flow guide hole (31) of the sealing member (3). The mixing and dilution component (4) is further fitted with a pre-cooling shell (5) that is connected to the cooling shell (2) and forms a pre-cooling annular cavity flow channel on the radial outer side; The mixing shell (41) of the mixing and dilution assembly (4) has coaxial partition plates (411) arranged radially at intervals along the cross-section of the cylindrical shell cavity in such a way as to construct an annular serpentine flow guide gap in its cylindrical shell cavity.

2. The graphite sulfuric acid dilution and cooling device as described in claim 1, characterized in that, The plurality of the partition plates (411) are arranged in an alternating manner on the inner top and inner bottom surfaces of the mixing shell (41) to create a plurality of interconnected and coaxial annular gaps in the mixing shell (41), thereby forming a flow guide gap for the sulfuric acid medium to flow along a serpentine path.

3. The graphite sulfuric acid dilution and cooling device as described in claim 2, characterized in that, Between two adjacent partition tube plates (411), flow dividers (412) are also arranged circumferentially to divide the gap between the ring bodies. The flow dividers (412) in the gap between two adjacent ring bodies are staggered in a way that they are on different cross-sectional radius lines. The diversion strip (412) is simultaneously attached to the opposing side plates of two adjacent dividing tube plates (411) in a manner that is configured as an arc-shaped spindle plate.

4. The graphite sulfuric acid dilution and cooling device as described in claim 3, characterized in that, The top surface of the mixing shell (41) is provided with a liquid supply tube shell (42) that can supply diluent into its shell cavity in a dot matrix manner, and a sulfuric acid medium input tube (43) that passes through the liquid supply tube shell (42) and is coaxially connected with the mixing shell (41).

5. The graphite sulfuric acid dilution and cooling device as described in claim 4, characterized in that, The liquid supply pipe shell (42) comprises a cylindrical shell (421), an inlet (422), and a one-way outlet (423), wherein, The sulfuric acid medium input pipe (43) penetrates the cylindrical shell (421) in a manner that separates it from the cavity of the cylindrical shell (421); The top surface of the cylindrical shell (421) is provided with an inlet port (422) for inputting diluent, and the bottom surface of the cylindrical shell (421) is provided with a unidirectional outlet port (423) with a staggered distribution on the annular surface.

6. The graphite sulfuric acid dilution and cooling device as described in claim 5, characterized in that, The lower axial end of the mixing shell (41) is also provided with a guide tube shell (44) that communicates with the guide hole (31), wherein, Inside the cavity of the guide tube shell (44), there is a turbulence spiral plate (441) that can limit the flow of diluted sulfuric acid medium along the spiral path.

7. The graphite sulfuric acid dilution and cooling apparatus as described in claim 6, characterized in that, The precooling shell (5) has a first coolant inlet (51) and a first coolant outlet (52) on both sides of the shell, and the mixing shell (41) is also fitted with a semiconductor heat exchanger (53) that can accelerate heat transfer.

8. The graphite sulfuric acid dilution and cooling apparatus as described in claim 7, characterized in that, The cooling shell (2) is also provided with a bottom end cap (21) at its axial lower end, and an output port (211) is provided on the bottom end cap (21).

9. The graphite sulfuric acid dilution and cooling apparatus as described in claim 8, characterized in that, A second coolant inlet (22) and a second coolant outlet (23) are also inserted into the side of the cooling shell (2).

10. The graphite sulfuric acid dilution and cooling apparatus as described in claim 9, characterized in that, A baffle plate (13) is provided between two adjacent graphite blocks (1) to limit the stacked connection state of the two and to divide the cooling gap into a serpentine flow channel.

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