Silicon carbide sulphuric acid dilution cooler

Abstract

The present application relates to sulfuric acid dilution cooling technical field, specifically to a kind of silicon carbide sulfuric acid dilution cooler, including body, the body inside is provided with distribution mixing section, cooling section and stirring mixing section.The present application will dilution liquid be arranged into mixing chamber along tangent direction and mixed with concentrated sulfuric acid, two kinds of materials are all spiral downward flow, similar to have stirring paddle and stir, make mixing more fully;And concentrated sulfuric acid and dilution liquid in mixing chamber fluid state and flow direction have changed multiple times, make mixing more evenly, heat release more quickly, help the cooling of rear end;Avoid causing cooler to be damaged due to temperature is too high;By setting multiple adjustable overflow pipes, make overflow pipe upper end face on the same horizontal line, ensure that mixed solution does not appear in equipment inside bias flow phenomenon;Make mixed solution enter cooling section more evenly, the mixed solution amount in each heat exchange pipe is basically identical, and heat exchange effect is better.

Description

Technical Field

[0001] This invention relates to the field of sulfuric acid dilution and cooling technology, specifically to a silicon carbide sulfuric acid dilution and cooling device. Background Technology

[0002] Sulfuric acid is an important basic chemical raw material with wide applications in various sectors of the national economy, hence its historical reputation as "the mother of industry." In terms of demand, the phosphate fertilizer industry is the largest user of sulfuric acid. The production of ammonium sulfate and superphosphate consumes large amounts of dilute sulfuric acid. The preparation of dilute sulfuric acid generally involves mixing concentrated sulfuric acid with water and cooling it using a graphite-based sulfuric acid dilution cooler. After being mixed in the upper part of the equipment, the concentrated sulfuric acid and water enter the lower cooling section for further cooling.

[0003] The existing graphite sulfuric acid dilution coolers have the following problems: 1. When concentrated sulfuric acid is diluted, it relies on natural mixing in the mixing chamber, resulting in uneven mixing; 2. A large amount of heat is generated during sulfuric acid dilution, and the mixing continues to release heat in the lower cooling section, reducing cooling efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a silicon carbide sulfuric acid dilution cooler to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a silicon carbide sulfuric acid dilution cooler, comprising a body, wherein the body is provided with a distribution mixing section, a cooling section, and a stirring mixing section; the distribution mixing section is used to mix concentrated sulfuric acid and a diluent multiple times to obtain a diluted mixed solution; the cooling section is used to cool down the heat generated during the dilution process; the stirring mixing section is used to stir and mix the mixed solution; wherein the distribution mixing section includes an upper mixing chamber, a lower mixing chamber, and an overflow chamber, and concentrated sulfuric acid and a diluent are injected into the upper mixing chamber to form a mixed solution, completing one mixing step; the mixed solution continues to flow to... The lower mixing chamber performs secondary mixing; the mixed solution continues to flow to the overflow chamber for tertiary mixing; the cooling section includes heat exchange tubes and a cooling chamber, with several heat exchange tubes disposed in the cooling chamber, through which a cooling medium is introduced, and the heat exchange tubes cool the mixed solution; the stirring and mixing section includes a bottom mixing chamber and a mixing assembly, which transports the mixed solution to the mixing chamber. When the temperature in the bottom mixing chamber is lower than a set threshold, the mixing assembly stirs and cools the mixed solution; when the temperature in the bottom mixing chamber is higher than the set threshold, the mixing assembly stirs and discharges the mixed solution.

[0006] Furthermore, the upper mixing chamber includes a mixing chamber cover plate, an upper mixing chamber inner cavity, an upper mixing chamber outer cavity, and a mixing chamber cooling jacket. The mixing chamber cover plate seals the top of the upper mixing chamber outer cavity. The mixing chamber cooling jacket is fitted onto the outside of the upper mixing chamber outer cavity. The side wall of the mixing chamber cooling jacket has a coolant inlet and a coolant outlet. The height of the coolant outlet is higher than that of the coolant inlet. The upper mixing chamber outer cavity has a concentrated sulfuric acid inlet and a diluent inlet, which are used to inject concentrated sulfuric acid and diluent into the upper mixing chamber outer cavity to form a mixed solution. The side wall of the upper mixing chamber inner cavity has a window, which is used to input the mixed solution into the upper mixing chamber inner cavity to complete one mixing cycle.

[0007] Furthermore, the lower mixing chamber includes an inner lower mixing chamber and an outer lower mixing chamber. The inner lower mixing chamber communicates with the inner upper mixing chamber. A second window is provided on the side wall of the inner lower mixing chamber, through which the mixed solution flows into the outer lower mixing chamber for secondary mixing.

[0008] Furthermore, the overflow chamber includes an overflow plate, a distribution plate, and overflow pipes. The overflow plate is located below the outer cavity of the lower mixing chamber. After the mixed solution flows into the overflow plate, when the liquid level of the mixed solution is higher than the overflow plate, the mixed solution is transported to the distribution plate to complete three mixing processes. Several overflow pipes are located in the distribution plate, and the top of the overflow pipe is higher than the top surface of the distribution plate.

[0009] Furthermore, the heat exchange tube is a silicon carbide heat exchange tube, one end of which is connected to the overflow pipe, and the other end of which extends into the bottom mixing chamber.

[0010] Furthermore, the side wall of the cooling chamber is provided with a second coolant inlet, a second coolant outlet, and a vent. The height of the second coolant outlet is higher than that of the second coolant inlet, and the height of the vent is higher than that of the second coolant outlet. The interior of the cooling chamber is provided with baffles, and several baffles are staggered.

[0011] Furthermore, the mixing assembly includes a stirring unit and a pushing unit, wherein the stirring unit rotates to drive the mixing solution to mix.

[0012] When the temperature in the bottom mixing chamber is higher than the threshold, the pushing unit moves to control the stirring unit to fully fit the inner wall of the bottom mixing chamber, dividing the bottom mixing cavity into an upper mixing chamber and a lower mixing chamber. The mixed solution is stirred and cooled in the upper mixing chamber.

[0013] When the temperature in the bottom mixing chamber is below a threshold, the pushing unit moves to control the stirring unit to maintain a gap between itself and the inner wall of the mixed air, and the mixed solution is discharged after stirring.

[0014] Furthermore, the stirring unit includes a central rod, and a hinged frame is provided on the side wall of the central rod. Several frames are distributed in a circle, and a sealing cloth is provided between two adjacent frames. The frames and the sealing cloth are alternately distributed to form a cone shape. The top diameter of the cone shape is smaller than the bottom diameter.

[0015] The pushing unit includes a central truncated cone, on the side wall of which are a plurality of hinged pushing blocks. The pushing blocks are arranged in a circumferential pattern. The outer surface of the pushing blocks is in contact with the inner surface of the cone. A corrugated rubber tube is provided between the pushing blocks and the central truncated cone. The bottom of the central truncated cone is connected to a U-shaped pushing frame. The U-shaped pushing frame passes through a connecting sleeve. A corrugated rubber tube is provided inside the connecting sleeve. When the corrugated rubber tube is heated, it pushes the U-shaped pushing frame upward to move. The connecting sleeve is connected to the output shaft of a drive motor. When the connecting sleeve rotates, it drives the central rod to rotate through the rotating shaft.

[0016] Furthermore, the stirring unit includes a central rod II, and a hinged skeleton II is provided on the side wall of the central rod II. Several skeleton IIs are distributed in a circle, and a sealing cloth II is provided between two adjacent skeleton IIs. The skeleton IIs and the sealing cloth II are alternately distributed to form a cone II, and the top diameter of the cone II is larger than the bottom diameter.

[0017] The pushing unit includes a central frustum II, on the side wall of which are a plurality of hinged pushing blocks II, which are arranged in a circumferential pattern. The inner surface of each pushing block II is in contact with the outer surface of the conical shape II. A corrugated rubber tube III is provided between the pushing blocks II and the central frustum II. The bottom of the central frustum II is connected to a U-shaped pushing frame II. The U-shaped pushing frame II passes through a connecting sleeve II. A corrugated rubber tube IV is provided inside the connecting sleeve II. When heated, the corrugated rubber tube IV pushes the U-shaped pushing frame II upward to move. A compression spring is provided inside the connecting sleeve II. The compression spring drives the U-shaped pushing frame II to return to its original position. The central rod II is connected to the output shaft of the drive motor II.

[0018] Furthermore, the bottom of the bottom mixing cavity is provided with several discharge pipes, one end of which extends to the dilute sulfuric acid outlet.

[0019] Furthermore, all parts of this equipment that come into contact with materials are made of corrosion-resistant materials, which can meet the requirements of corrosive working conditions. This equipment can also be used for the dilution, mixing, and cooling of other liquid materials.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. In this invention, the diluted solution is discharged tangentially into the mixing chamber and mixed with concentrated sulfuric acid. Both materials flow downwards in a spiral shape, similar to stirring with a paddle, resulting in more thorough mixing. Furthermore, the fluid state and flow direction of the concentrated sulfuric acid and diluted solution undergo multiple changes within the mixing chamber, leading to more uniform mixing and faster heat release, which aids in downstream cooling and prevents damage to the cooler due to excessive temperature. By setting multiple adjustable overflow pipes, the upper surfaces of the overflow pipes are kept on the same horizontal line, ensuring that the mixed solution does not exhibit flow deviation within the equipment. This results in a more uniform flow of the mixed solution into the cooling section, with a basically consistent amount of mixed solution in each heat exchange tube, leading to better heat exchange performance.

[0022] 2. This invention ensures a uniform concentration of the final discharged solution by re-stirring and mixing the cooled solution, avoiding inconsistencies in concentration from individual heat exchange tubes. Furthermore, if an exothermic reaction occurs again during the stirring and mixing process, the solution is temporarily stored in the mixing chamber and stirred and cooled to allow for sufficient exothermic reaction until the temperature of the solution cools to a set threshold before being discharged, preventing damage to the container due to excessively high temperature. During discharge, the solution adheres to the inner wall of the bottom mixing chamber and slides downwards, accelerating cooling and improving cooling efficiency. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a front sectional view of the overall structure of Embodiment 2 of the present invention;

[0025] Figure 2 This is a front sectional view of the overall structure of Embodiment 3 of the present invention;

[0026] Figure 3 This is a schematic front cross-sectional view of the distributed mixing section of the present invention;

[0027] Figure 4 This is a schematic front cross-sectional view of the cooling section of the present invention;

[0028] Figure 5 This is a schematic front cross-sectional view of the mixing section in Embodiment 2 of the present invention;

[0029] Figure 6 This is a schematic front cross-sectional view of the hybrid component in Embodiment 2 of the present invention;

[0030] Figure 7This is a schematic front cross-sectional view of the mixing section in Embodiment 3 of the present invention;

[0031] Figure 8 This is a schematic diagram of the front cross-sectional structure of the hybrid component in Embodiment 3 of the present invention;

[0032] Figure 9 This is a top view of the overflow pipe of the present invention;

[0033] Figure 10 This is a schematic diagram of the main structure of the overflow tray of the present invention;

[0034] In the diagram: 1. The vessel;

[0035] 201. Mixing chamber top cover; 202. Upper mixing chamber inner cavity; 203. Upper mixing chamber outer cavity; 204. Mixing chamber cooling jacket; 205. Coolant inlet 1; 206. Coolant outlet 1; 207. Concentrated sulfuric acid inlet; 208. Diluent inlet; 209. Window 1; 210. Lower mixing chamber inner cavity; 211. Lower mixing chamber outer cavity; 212. Window 2; 213. Overflow plate; 214. Distribution plate; 215. Overflow pipe;

[0036] 301. Heat exchanger tube; 302. Cooling chamber; 303. Coolant inlet 2; 304. Coolant outlet 2; 305. Drain port; 306. Baffle plate;

[0037] 401. Bottom mixing chamber; 402. Upper mixing chamber; 403. Lower mixing chamber;

[0038] 411. Central rod 1; 412. Frame 1; 413. Sealing cloth 1; 414. Conical shape 1; 415. Central frustum 1; 416. Push block 1; 417. Corrugated rubber tube 1; 418. U-shaped push frame 1; 419. Connecting sleeve 1; 420. Corrugated rubber tube 2; 421. Drive motor 1; 422. Rotating shaft 1;

[0039] 431. Central rod II; 432. Frame II; 433. Sealing cloth II; 434. Conical shape II; 435. Central frustum II; 436. Push block II; 437. Corrugated rubber tube III; 438. U-shaped push frame II; 439. Connecting sleeve II; 440. Corrugated rubber tube IV; 441. Compression spring; 442. Drive motor II;

[0040] 5. Discharge pipe; 6. Dilute sulfuric acid outlet;

[0041] Instruction manual attached Figure 7 In this context, 'a' represents the drain outlet.

[0042] Instruction manual attached Figure 10 In this context, 'b' represents the overflow tooth. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1:

[0045] Please see Figure 1 , Figures 3-4 , Figures 9-10 The present invention provides a technical solution: a silicon carbide sulfuric acid dilution cooler, comprising a body 1, wherein the body 1 is provided with a distribution mixing section, a cooling section and a stirring mixing section; the distribution mixing section is used to mix concentrated sulfuric acid and diluent multiple times to obtain a diluted mixed solution; the cooling section is used to cool down the heat generated during the dilution process; and the stirring mixing section is used to stir and mix the mixed solution.

[0046] The distribution mixing section, cooling section, stirring mixing section, and the sealing gaskets between them are connected into a whole by external bolts. A helical spring is added to each bolt to provide compensation force, ensuring that the silicon carbide sulfuric acid dilution cooler will not leak materials during operation.

[0047] The distribution mixing section includes an upper mixing chamber, a lower mixing chamber, and an overflow chamber. Concentrated sulfuric acid and diluent are injected into the upper mixing chamber to form a mixed solution, completing the first mixing. The mixed solution continues to flow to the lower mixing chamber for a second mixing. The mixed solution continues to flow to the overflow chamber for a third mixing.

[0048] The upper mixing chamber includes a mixing chamber cover plate 201, an upper mixing chamber inner cavity 202, an upper mixing chamber outer cavity 203, and a mixing chamber cooling jacket 204. The mixing chamber cover plate 201 seals the top of the upper mixing chamber outer cavity 203. The mixing chamber cooling jacket 204 is fitted onto the outside of the upper mixing chamber outer cavity 203. The side wall of the mixing chamber cooling jacket 204 has a coolant inlet 205 and a coolant outlet 206. The height of the coolant outlet 206 is higher than that of the coolant inlet 205. The upper mixing chamber outer cavity 203 has a concentrated sulfuric acid inlet 207 and a diluent inlet 208, which are used to inject concentrated sulfuric acid and diluent into the upper mixing chamber outer cavity 203 to form a mixed solution. The side wall of the upper mixing chamber inner cavity 202 has a window 209, which is used to input the mixed solution into the upper mixing chamber inner cavity 202 to complete one mixing cycle.

[0049] The lower mixing chamber includes a lower mixing inner cavity 210 and a lower mixing outer cavity 211. The lower mixing inner cavity 210 is connected to the upper mixing inner cavity 202. A second window 212 is provided on the side wall of the lower mixing inner cavity 210. The mixed solution flows into the lower mixing outer cavity 211 through the second window 212 for secondary mixing.

[0050] The overflow chamber includes an overflow plate 213, a distribution plate 214, and overflow pipes 215. The overflow plate 213 is located below the outer cavity 211 of the lower mixing chamber. After the mixed solution flows into the overflow plate 213, when the liquid level of the mixed solution is higher than the overflow plate 213, the mixed solution is transported to the distribution plate 214 to complete three mixing processes. Several overflow pipes 215 are located in the distribution plate 214, and the top of the overflow pipes 215 is higher than the top surface of the distribution plate 214.

[0051] The overflow pipe and the distribution plate are connected by a thread, which can adjust the overflow height and make the upper end face of the overflow pipe on the same horizontal line, so as to ensure that the mixture does not flow off course in the equipment.

[0052] Detailed implementation: Concentrated sulfuric acid is discharged from the concentrated sulfuric acid inlet 207 at the top of the equipment into the upper mixing chamber 203, and the diluent is discharged from the diluent inlet 208 on the side into the upper mixing chamber. At this time, the diluent enters in a spiral shape. The two fluids are mixed once in the upper mixing chamber 203 to obtain a mixed solution. Since the diluent enters in a spiral shape from the side, the mixed solution also flows downward in this shape. The mixed solution enters the lower mixing chamber 210 through the window 209 evenly opened on the side wall of the upper mixing chamber 202 for a second mixing. Then, it flows to the overflow plate 213 through the window 212 evenly opened on the side wall of the lower mixing chamber 210 for a third mixing. Overflow teeth are machined on the upper part of the overflow plate 213 so that the mixed solution falls evenly from all sides onto the distribution plate 214 at a low speed. The distribution plate 214 is provided with several longitudinal channels. The upper part of the longitudinal channels is machined with internal threads, and the lower part of the overflow pipe 215 is machined with external threads. The overflow pipe 215 is installed on the distribution plate 214 by threaded connection. The liquid level of the mixed solution on the distribution plate 214 rises slowly and enters the overflow pipe 215 evenly. Then it enters each heat exchange tube 301 corresponding to the lower part for cooling. In order to prevent the concentrated sulfuric acid and water from releasing a large amount of heat and causing the temperature of the distribution mixing section to be too high and damaged, a cooling jacket is provided on the outside of the distribution mixing section, and coolant is introduced for cooling.

[0053] The cooling section includes heat exchange tubes 301 and cooling chamber 302. Several heat exchange tubes 301 are arranged in the cooling chamber 302. Cooling medium is introduced into the cooling chamber 302, and the heat exchange tubes 301 cool the mixed solution.

[0054] The heat exchange tube 301 is a silicon carbide heat exchange tube, which has the characteristics of smooth tube wall, low medium flow resistance, high heat transfer efficiency and good corrosion resistance. One end of the heat exchange tube 301 is connected to the overflow pipe 215, and the other end of the heat exchange tube 301 extends into the bottom mixing chamber 401. The side wall of the cooling chamber 302 is provided with a second coolant inlet 303, a second coolant outlet 304 and a vent 305. The height of the second coolant outlet 304 is higher than that of the second coolant inlet 303, and the height of the vent 305 is higher than that of the second coolant outlet 304. The interior of the cooling chamber 302 is provided with baffles 306, and several baffles 306 are staggered.

[0055] The lower part of the distribution plate is machined with channel holes corresponding to the lower tube sheet. During installation, it is inserted into the tube sheet and seamlessly connected with the heat exchange tubes, making the mixture enter the cooling section more evenly. The amount of mixture in each heat exchange tube is basically the same, resulting in better heat exchange effect. The heat exchange tubes and the tube sheet adopt a single tube sealing structure, and the heat exchange tubes and the tube sheet can float freely to eliminate the thermal stress caused by the difference in thermal expansion between the silicon carbide tubes and the steel shell.

[0056] Specifically, silicon carbide heat exchange tubes are inserted into the corresponding channels of the tube sheet, and single tubes are sealed and assembled into a tube bundle using sealing rings. The assembled tube bundle is placed into the device body 1, and the inner wall of the device body 1 is provided with several baffles 306, which can increase the flow rate of the coolant in the device body 1 and change its flow direction, thereby enhancing the heat transfer process outside the tubes. When the equipment is running, the heat released during the mixing process is transferred to the coolant outside the tubes and carried out of the equipment, thereby achieving the purpose of cooling.

[0057] Example 2:

[0058] Please see Figure 1 , Figures 5-6 The mixing section includes a bottom mixing chamber 401 and a mixing component, which delivers the mixed solution into the mixing chamber. When the temperature in the bottom mixing chamber 401 is lower than a set threshold, the mixing component stirs and cools the mixed solution. When the temperature in the bottom mixing chamber 401 is higher than the set threshold, the mixing component stirs and discharges the mixed solution.

[0059] The mixing assembly includes a stirring unit and a pushing unit. When the stirring unit rotates, it drives the mixed solution to mix.

[0060] When the temperature inside the bottom mixing chamber 401 is higher than the threshold, the push unit moves to control the stirring unit to completely fit the inner wall of the bottom mixing chamber 401, dividing the bottom mixing cavity into an upper mixing chamber 402 and a lower mixing chamber 403. The mixed solution is stirred and cooled in the upper mixing chamber 402.

[0061] When the temperature inside the bottom mixing chamber 401 is lower than the threshold, the push unit moves to control the stirring unit to maintain a gap between the stirring unit and the inner wall of the mixed air, and the mixed solution is discharged after stirring.

[0062] The bottom of the mixing cavity is provided with several discharge pipes 5, one end of which extends to the dilute sulfuric acid outlet 6.

[0063] The stirring unit includes a central rod 411, and a hinged frame 412 is provided on the side wall of the central rod 411. Several frames 412 are distributed in a circle, and a sealing cloth 413 is provided between two adjacent frames 412. The frames 412 and the sealing cloth 413 are alternately distributed to form a cone 414. The top diameter of the cone 414 is smaller than the bottom diameter.

[0064] The pushing unit includes a central frustum 415, and several hinged pushing blocks 416 are provided on the side wall of the central frustum 415. The pushing blocks 416 are circumferentially distributed. The outer surface of the pushing blocks 416 is in contact with the inner surface of the conical shape 414. A corrugated rubber tube 417 is provided between the pushing blocks 416 and the central frustum 415. The bottom of the central frustum 415 is connected to a U-shaped pushing frame 418. The U-shaped pushing frame 418 passes through a connecting sleeve 419. A corrugated rubber tube 420 is provided inside the connecting sleeve 419. When the corrugated rubber tube 420 is heated, it pushes the U-shaped pushing frame 418 upward. The connecting sleeve 419 is connected to the output shaft of the drive motor 421. When the connecting sleeve 419 rotates, it drives the central rod 411 to rotate through the rotating shaft 422.

[0065] The specific implementation method is as follows: The mixed solution cooled by the heat exchange tube 301 is discharged into the bottom mixing chamber 401. At this time, the drive motor 421 drives the connecting sleeve 419 to rotate, the connecting sleeve 419 drives the central rod 411 to rotate, and the central rod 411 drives multiple skeletons 412 to rotate, causing the skeletons 412 and the sealing cloth 413 to perform circumferential motion. Since the skeletons 412 and the sealing cloth 413 are connected to form a cone shape, the mixed solution discharged from the heat exchange tube 301 will drip onto the cone shape. At this time, the rotating skeletons 412 can stir the mixed solution, making the mixture more soluble. The liquid is mixed again to ensure a uniform concentration of the final discharged solution. When the drive motor 421 rotates at high speed, the centrifugal force generated by the rotation of the cone 414 throws the solution onto the side wall of the bottom mixing chamber 401, causing it to gradually slide down the side wall. Since coolant is injected into the outside of the bottom mixing chamber 401, the solution sliding down the inner wall of the bottom mixing chamber 401 is rapidly cooled, improving the cooling effect. During the stirring process, if the concentration of the solution in a single heat exchange tube 301 is high, it will cause problems during the stirring process. A reaction occurs again, causing the temperature in the bottom mixing chamber 401 to rise. The air in the corrugated rubber tube 420 expands due to the heat, causing it to deform and push the U-shaped connecting frame upwards. This, in turn, moves the central truncated cone 415 upwards, expanding the frame 412 outwards and increasing the bottom diameter of the cone 414. This ensures the bottom of the cone 414 fits tightly against the inner wall of the bottom mixing chamber 401. At this point, the bottom mixing chamber 401 forms an upper mixing chamber 402 and a lower mixing chamber 403. Since the upper mixing chamber 402 is temporarily sealed... Therefore, the mixed solution will be temporarily stored in the mixing chamber 402, and the frame 412 will continue to stir the mixed solution by rotating, so that the mixed solution reacts and releases heat, and is fully cooled in the mixing chamber 402 until the temperature of the mixed solution drops to the set threshold before being discharged, so as to avoid the mixed solution being too hot and damaging the container. After the temperature is cooled to the set temperature, the corrugated rubber tube 420 will shrink, the central truncated cone 415 will move downward, the frame 412 will hang down naturally, and the fully mixed and cooled mixed solution will flow downward along the inside of the bottom mixing chamber 401 and finally be discharged.

[0066] When the upper mixing chamber 402 is formed, if the upper mixing chamber 402 and the inner wall of the bottom mixing chamber 401 are not completely attached, during the stirring process, some of the mixed solution can continue to be thrown out and slide down along the inner wall of the bottom mixing chamber 401. During this process, since the gap between the skeleton 412 and the bottom mixing chamber 401 is small, the sliding mixed solution will also cool down quickly, ensuring cooling efficiency.

[0067] During the process of the corrugated rubber tube 420 being heated and expanding, pushing the central frustum 415 upward, the corrugated rubber tube 417 will also be heated and expanding, which will generate a thrust on the pushing block 416. Since one end of the pushing block 416 is hinged to the central frustum 415, it will hinge after being pushed. Adjusting the angle of the pushing block 416 will ensure that one side of the pushing block 416 is always in contact with the inner wall of the conical shape 414, increasing the contact area between the two and improving stability.

[0068] Both the corrugated rubber tube 417 and the corrugated rubber tube 420 are filled with liquid, such as water. Therefore, when the temperature is too high, the water evaporates to produce water vapor, which can cause the corrugated rubber tube 417 and the corrugated rubber tube 420 to expand and undergo elastic deformation.

[0069] Example 3: The difference from Example 2 is:

[0070] Please see Figure 2 , Figures 7-8 The stirring unit includes a central rod 431, and a hinged frame 432 is provided on the side wall of the central rod 431. Several frames 432 are distributed in a circle, and a sealing cloth 433 is provided between two adjacent frames 432. The frames 432 and the sealing cloth 433 are alternately distributed to form a cone 434. The top diameter of the cone 434 is larger than the bottom diameter.

[0071] The pushing unit includes a central frustum 435, on the side wall of which are several hinged pushing blocks 436 arranged circumferentially. The inner surface of each pushing block 436 is in contact with the outer surface of a conical shape 434. A corrugated rubber tube 437 is provided between the pushing blocks 436 and the central frustum 435. When heated and expanded, the corrugated rubber tube 437 pushes the pushing blocks 436 to hinge, ensuring that the side wall of the pushing blocks 436 is always in contact with the conical shape 434. The outer wall is fitted, and the bottom of the central truncated cone 435 is connected to the U-shaped push frame 438. The U-shaped push frame 438 passes through the connecting sleeve 439. The connecting sleeve 439 is equipped with a corrugated rubber tube 440. When the corrugated rubber tube 440 is heated, it pushes the U-shaped push frame 438 upward to move. The connecting sleeve 439 is equipped with a compression spring 441. The compression spring 441 drives the U-shaped push frame 438 to return to its original position. The central rod 431 is connected to the output shaft of the drive motor 442.

[0072] Both corrugated rubber tube 3 (437) and corrugated rubber tube 4 (440) are filled with liquid, such as water.

[0073] The specific implementation method is as follows: Unlike the specific implementation method in Example 2, the mixed solution cooled by the heat exchange tube 301 is discharged into the bottom mixing chamber 401. The conical shape 434 will catch the mixed solution. At this time, the drive motor 442 is started to drive the central rod 431 to rotate. The central rod 431 drives the frame 432 to slowly rotate to stir and mix the mixed solution again until the surface of the mixed solution is higher than the top of the frame 432. The mixed solution can overflow from the conical shape 434 and be discharged downwards. When the temperature in the bottom mixing chamber 401 rises, the corrugated rubber tube 437 expands due to heat and pushes the U-shaped connecting frame 2 downwards. At this time, the U-shaped connecting... The second frame moves the central frustum 435 downwards. At this time, the second frame 432, which loses its support, will droop downwards. Due to the weight of the mixed solution inside, the second frame 432 will open outwards, so that the end of the frame fits against the inner wall of the bottom mixing chamber 401, forming the upper mixing chamber 402 and the lower mixing chamber 403. The mixed solution is temporarily placed in the upper mixing chamber 402 for stirring and cooling until its temperature drops to the set temperature. At this time, the corrugated rubber tube 437 contracts, and the second U-shaped connecting frame moves upwards under the rebound force generated by the deformation of the compression spring 441, which moves the central frustum 435 upwards and causes the second frame 432 to contract inwards, continuing to stir and mix the mixed solution.

[0074] There is a gap at the hinge of the second skeleton 432 and the second central rod 431, but the flow rate of the mixed solution flowing out from the gap is less than the flow rate of the mixed solution discharged into the bottom mixing chamber 401.

[0075] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A silicon carbide sulfuric acid dilution cooler, characterized in that: The apparatus includes a body (1), which is provided with a distribution mixing section, a cooling section and a stirring mixing section inside the body (1); the distribution mixing section is used to mix concentrated sulfuric acid and diluent multiple times to obtain a diluted mixed solution; the cooling section is used to cool down the heat generated during the dilution process; and the stirring mixing section is used to stir and mix the mixed solution. The distribution mixing section includes an upper mixing chamber, a lower mixing chamber, and an overflow chamber. Concentrated sulfuric acid and a diluent are injected into the upper mixing chamber to form a mixed solution, completing the first mixing step. The mixed solution continues to flow into the lower mixing chamber for a second mixing step. The mixed solution continues to flow into the overflow chamber for a third mixing step. The cooling section includes heat exchange tubes (301) and a cooling chamber (302). Several heat exchange tubes (301) are disposed in the cooling chamber (302). Cooling medium is introduced into the cooling chamber (302). The heat exchange tubes (301) cool the mixed solution. The mixing section includes a bottom mixing chamber (401) and a mixing component. The mixing solution is delivered to the bottom mixing chamber. When the temperature in the bottom mixing chamber (401) is lower than a set threshold, the mixing component stirs and cools the mixing solution. When the temperature in the bottom mixing chamber (401) is higher than the set threshold, the mixing component stirs and discharges the mixing solution. The upper mixing chamber includes a mixing chamber cover plate (201), an upper mixing chamber inner cavity (202), an upper mixing chamber outer cavity (203), and a mixing chamber cooling jacket (204). The mixing chamber cover plate (201) seals the top of the upper mixing chamber outer cavity (203). The mixing chamber cooling jacket (204) is fitted onto the outside of the upper mixing chamber outer cavity (203). The side wall of the mixing chamber cooling jacket (204) has a coolant inlet (205) and a coolant outlet (206). The height of the coolant outlet (206) is higher than that of the coolant inlet (205). The upper mixing chamber (203) is provided with a concentrated sulfuric acid inlet (207) and a diluent inlet (208), which are used to inject concentrated sulfuric acid and diluent into the upper mixing chamber (203) to form a mixed solution. A window (209) is opened on the side wall of the upper mixing chamber (202), which is used to input the mixed solution into the upper mixing chamber (202) to complete one mixing. The lower mixing chamber includes a lower mixing inner cavity (210) and a lower mixing outer cavity (211). The lower mixing inner cavity (210) is connected to the upper mixing inner cavity (202). A second window (212) is provided on the side wall of the lower mixing inner cavity (210). The mixed solution flows into the lower mixing outer cavity (211) through the second window (212) for secondary mixing. The overflow chamber includes an overflow plate (213), a distribution plate (214), and overflow pipes (215). The overflow plate (213) is located below the lower mixing chamber (211). After the mixed solution flows into the overflow plate (213), when the liquid level of the mixed solution is higher than the overflow plate (213), the mixed solution is transported to the distribution plate (214) to complete three mixing processes. Several overflow pipes (215) are located in the distribution plate (214), and the top of the overflow pipe (215) is higher than the top surface of the distribution plate (214). The heat exchange tube (301) is a silicon carbide heat exchange tube. One end of the heat exchange tube (301) is connected to the overflow pipe (215), and the other end of the heat exchange tube (301) extends into the bottom mixing chamber (401).

2. The silicon carbide sulfuric acid dilution cooler according to claim 1, characterized in that: The cooling chamber (302) is provided with a second coolant inlet (303), a second coolant outlet (304), and a vent (305) on its side wall. The height of the second coolant outlet (304) is higher than that of the second coolant inlet (303), and the height of the vent (305) is higher than that of the second coolant outlet (304). The interior of the cooling chamber (302) is provided with baffles (306), and several baffles (306) are staggered.

3. The silicon carbide sulfuric acid dilution cooler according to claim 1, characterized in that: The mixing assembly includes a stirring unit and a pushing unit, wherein the stirring unit rotates to mix the solution. When the temperature inside the bottom mixing chamber (401) is higher than the threshold, the pushing unit moves to control the stirring unit to fully fit against the inner wall of the bottom mixing chamber (401), dividing the bottom mixing chamber cavity into an upper mixing chamber (402) and a lower mixing chamber (403), and the mixed solution is stirred and cooled in the upper mixing chamber (402); When the temperature inside the bottom mixing chamber (401) is lower than the threshold, the pushing unit moves to control the stirring unit to maintain a gap between itself and the inner wall of the bottom mixing chamber, and the mixed solution is discharged after stirring.

4. A silicon carbide sulfuric acid dilution cooler according to claim 3, characterized in that: The stirring unit includes a central rod (411), and a hinged frame (412) is provided on the side wall of the central rod (411). Several frames (412) are distributed in a circle, and a sealing cloth (413) is provided between two adjacent frames (412). The frames (412) and the sealing cloth (413) are alternately distributed to form a cone (414). The top diameter of the cone (414) is smaller than the bottom diameter. The pushing unit includes a central frustum (415), and several hinged pushing blocks (416) are provided on the side wall of the central frustum (415). The pushing blocks (416) are arranged in a circle. The outer surface of the pushing blocks (416) is attached to the inner surface of the conical shape (414). A corrugated rubber tube (417) is provided between the pushing blocks (416) and the central frustum (415). The bottom of the central frustum (415) is connected to the U-shaped pushing frame (414). 18) Connection, the U-shaped push frame one (418) passes through the connecting sleeve one (419), the connecting sleeve one (419) is provided with a corrugated rubber tube two (420) inside, the corrugated rubber tube two (420) pushes the U-shaped push frame one (418) upward when heated, the connecting sleeve one (419) is connected to the output shaft of the drive motor one (421), when the connecting sleeve one (419) rotates, it drives the center rod one (411) to rotate through the rotating shaft one (422).

5. A silicon carbide sulfuric acid dilution cooler according to claim 3, characterized in that: The stirring unit includes a central rod (431), and a hinged skeleton (432) is provided on the side wall of the central rod (431). Several skeletons (432) are distributed in a circle, and a sealing cloth (433) is provided between two adjacent skeletons (432). The skeletons (432) and the sealing cloth (433) are alternately distributed to form a conical shape (434). The top diameter of the conical shape (434) is larger than the bottom diameter. The pushing unit includes a central frustum II (435), and several hinged pushing blocks II (436) are provided on the side wall of the central frustum II (435). The pushing blocks II (436) are distributed circumferentially. The inner surface of the pushing blocks II (436) is attached to the outer surface of the conical II (434). A corrugated rubber tube III (437) is provided between the pushing blocks II (436) and the central frustum II (435). The bottom of the central frustum II (435) is connected to a U-shaped pushing frame II (438). The U-shaped pusher frame 2 (438) passes through the connecting sleeve 2 (439). The connecting sleeve 2 (439) is provided with a corrugated rubber tube 4 (440). When the corrugated rubber tube 4 (440) is heated, it pushes the U-shaped pusher frame 2 (438) upward to move. The connecting sleeve 2 (439) is provided with a compression spring (441). The compression spring (441) drives the U-shaped pusher frame 2 (438) to reset. The center rod 2 (431) is connected to the output shaft of the drive motor 2 (442).

6. A silicon carbide sulfuric acid dilution cooler according to claim 3, characterized in that: The bottom of the mixing chamber is provided with several discharge pipes (5), one end of which extends to the dilute sulfuric acid outlet (6).

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