Dissolving device for sulfamic acid production

Abstract

The invention provides a dissolving device for sulfamic acid production, and belongs to the technical field of sulfamic acid production, the dissolving device comprises a preparation tank and a stirring shaft arranged in the preparation tank, and the preparation tank is provided with a liquid inlet pipe, a feeding pipe and a driving part used for driving the stirring shaft to rotate; a valve block capable of blocking the feeding pipe is vertically and slidably connected to an opening in the bottom end of the feeding pipe through a first elastic piece, a first spring pin capable of transversely sliding is arranged on the pipe wall of the feeding pipe in a penetrating mode, the inclined end face of the right end of the first spring pin abuts against the inclined edge of the upper end of the valve block, and a linkage shaft is rotationally connected to the top wall in the preparation tank; the linkage shaft is provided with a cam which can be connected with the first spring pin in an abutting mode. A transmission part is arranged between the stirring shaft and the linkage shaft and is used for enabling the linkage shaft to synchronously rotate along with the stirring shaft; according to the invention, the probability that the local reaction temperature in the reaction container is instantaneously increased due to the violent reaction of the urea directly added into the fuming sulfuric acid can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aminosulfonic acid production, and in particular to a dissolving device for aminosulfonic acid production. Background Art

[0002] Aminosulfonic acid is an organic compound containing amino and sulfonic acid groups. It has strong solubility and can be quickly dissolved in water. Aminosulfonic acid is often used as an intermediate for fertilizers and industrial chemicals. It can also be used to synthesize herbicides, fire retardants, sweeteners, preservatives, metal cleaning agents, etc. It is a common chemical raw material. In compound fertilizers, aminosulfonic acid, as one of the nitrogen sources, can promote plant growth and improve soil nutrient supply. Its solubility allows aminosulfonic acid to quickly release nitrogen, providing the nitrogen fertilizer required by plants, thereby improving fertilizer efficiency and crop yields.

[0003] In industrial production, the production methods of aminosulfonic acid include hydroxylamine method, ammoniation method, chlorosulfonation method and oleum method, etc. Among them, when using the oleum method to complete the preparation of aminosulfonic acid, it is necessary to utilize the reaction of urea and oleum to dissolve urea in oleum and generate a mixed solution containing aminosulfonic acid, and then dilute and filter the mixed solution containing aminosulfonic acid to obtain crude aminosulfonic acid, and then place the crude aminosulfonic acid in a dissolving tank to dissolve it again, and recrystallize it in a crystallization kettle, and finally filter and fluidize and dry it to obtain a high purity aminosulfonic acid product.

[0004] Referring to the Chinese patent application document with publication number CN115007035A and publication date September 6, 2022, entitled A dissolving device for aminosulfonic acid production and its dissolving process, a gas delivery component capable of cooperating with a mixing device is added to the reaction vessel. While the mixing device stirs the aminosulfonic acid raw material, the gas delivery component can perform reciprocating jet spray, thereby achieving the effect of aerating the aminosulfonic acid raw material, so that the aminosulfonic acid raw material is evenly heated and fully dissolved, so as to improve the processing efficiency of the aminosulfonic acid raw material.

[0005] Referring to the above technical scheme, when aminosulfonic acid is prepared by the oleum method, since the reaction between urea and oleum is an exothermic reaction, when urea is directly fed into the oleum from a feeding pipe for stirring, urea and oleum will react violently to generate a large amount of heat. At this time, the local reaction temperature inside the reaction container is prone to instantaneous increase, which will not only lead to an increase in the amount of by-products generated, but may even cause greater safety hazards. Summary of the invention

[0006] In view of this, the present application provides a dissolving device for producing aminosulfonic acid, which is mainly used to solve the problem that when urea is directly added into oleum, the local reaction temperature inside the reaction container is prone to instantaneous increase.

[0007] In order to solve the above-mentioned technical problems, the present application provides a dissolution device for the production of aminosulfonic acid, including a preparation tank and a stirring shaft arranged inside the tank, and the preparation tank is provided with a liquid inlet pipe, a feeding pipe and a driving member for driving the stirring shaft to rotate; the bottom open end of the feeding pipe is vertically slidably connected to a valve block capable of blocking the feeding pipe through a first elastic member, a first spring pin capable of sliding laterally is penetrated through the tube wall of the feeding pipe, and the inclined end surface of the right end of the first spring pin abuts against the inclined edge of the upper end of the valve block, a linkage shaft is rotatably connected to the top wall of the preparation tank, and a cam that can be abutted by the first spring pin is arranged on the linkage shaft; a transmission member is arranged between the stirring shaft and the linkage shaft, which is used to make the linkage shaft rotate synchronously with the stirring shaft.

[0008] By adopting the above technical solution, when urea is fed into the oleum, through the cooperation of the first elastic member, the cam and the first spring pin, when the distal arc surface of the cam abuts against the left end of the first spring pin, the first spring pin will apply downward pressure to the valve block to cause the valve block to move downward, and when the proximal arc surface of the cam abuts against the left end of the first spring pin, the first elastic member will drive the valve block to move upward, so that the valve block is in a reciprocating lifting state, so as to intermittently block the feeding pipe, thereby realizing intermittent feeding of urea; at the same time, the stirring turbulence effect generated by the rotation of the stirring shaft is utilized, so that the urea fed into the oleum can be quickly dispersed and dissolved in the oleum, thereby reducing the possibility of urea and oleum reacting violently to affect the production quality of aminosulfonic acid, and at the same time can reduce the probability of safety hazards to a certain extent, so that the production of aminosulfonic acid can be carried out stably and effectively.

[0009] Optionally, the bottom end of the linkage shaft is vertically slidably connected to a sleeve via a second elastic member, and the cam is fixedly sleeved outside the sleeve.

[0010] By adopting the above technical solution, with the participation of the second elastic member, as urea reacts with oleum, the sleeve will drive the cam to move upward as the air pressure inside the preparation tank increases, so that the cam and the first spring pin are misaligned to achieve the sealing of the feeding pipe by the valve block, so as to prevent excessive addition of urea into the oleum and affect the final production quality of aminosulfonic acid.

[0011] Optionally, the lower edge of the cam is tilted inward from top to bottom, and a rolling ball capable of abutting against the cam is provided at the left end of the first spring pin.

[0012] By adopting the above technical solution, a rolling ball is used instead of the first spring pin to contact the cam, which not only reduces the friction between the first spring pin and the cam when the cam rotates, but also reduces the possibility of the first spring pin blocking the cam when the cam moves down and resets.

[0013] Optionally, the transmission member includes a driving gear arranged on the stirring shaft and a driven gear arranged on the linkage shaft, and the driving gear is meshingly connected with the driven gear.

[0014] By adopting the above technical solution, when the stirring shaft rotates, the driving gear arranged on the stirring shaft will rotate accordingly. At this time, under the meshing transmission action of the driving gear and the driven gear, the linkage shaft will rotate accordingly.

[0015] Optionally, a partition is provided in the middle of the preparation tank, and a blanking plate is hinged at the blanking port opened on the partition through a torsion spring, and a locking member is provided between the partition and the blanking plate. The locking member is used to lock the position of the blanking plate or unlock the position of the blanking plate. The lower tank body of the preparation tank is connected to a water inlet pipe for external cold water injection.

[0016] By adopting the above technical solution, after the reaction of urea and oleum is completed, the blanking plate is opened by the cooperation of the locking piece to transfer the mixed solution containing aminosulfonic acid to the lower tank body of the preparation tank for dilution and cooling, thereby promoting the precipitation of aminosulfonic acid and reducing the difficulty of subsequent processing.

[0017] Optionally, the locking member includes a second spring pin disposed on the blanking plate, a locking hole for inserting the second spring pin is opened on the partition plate, and a trigger member for withdrawing the second spring pin from the locking hole is disposed between the partition plate and the sleeve.

[0018] By adopting the above technical solution, when the second spring pin is inserted into the locking hole, the blanking plate can block the blanking opening opened on the partition plate.

[0019] Optionally, the trigger member includes a hydraulic oil circuit arranged between the partition and the sleeve, and the two ends of the hydraulic oil circuit are respectively connected to the locking hole and the inner cavity of the sleeve, and a push block capable of pushing the second spring pin out of the locking hole is arranged inside the locking hole.

[0020] By adopting the above technical solution, the air pressure inside the preparation tank is used as the trigger condition for unlocking the blanking plate, so that the mixed solution containing aminosulfonic acid can be quickly transferred after the reaction of urea and oleum is completed, which is beneficial to improving the production efficiency of aminosulfonic acid.

[0021] Optionally, a transition slope matching the second spring pin is provided at the lower edge of the locking hole.

[0022] By adopting the above technical solution and using a transition slope to provide a guiding effect for the second spring pin, the possibility that the blanking plate is interfered with by the second spring pin and cannot be reset normally can be reduced.

[0023] Optionally, a sealing gasket that matches the inner cavity of the locking hole is provided at the edge of the push block.

[0024] By adopting the above technical solution, the sealing gasket can prevent the mixed solution from entering and blocking the locking hole, so as to prevent the plugging work of the locking hole and the second spring pin from being affected.

[0025] Optionally, a flexible scraper located above the partition is provided on the stirring shaft, and the flexible scraper can abut against the upper surface of the partition.

[0026] By adopting the above technical solution, the flexible scraper can rotate along with the stirring shaft and scrape off the mixed solution remaining on the upper surface of the partition. In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. Urea is fed into oleum by intermittent feeding. At the same time, stirring and turbulence are used to make each batch of urea dissolved in oleum more stably and evenly, thereby reducing the possibility of violent reaction between urea and oleum and affecting the mixing quality of the two, thereby improving the subsequent production quality of aminosulfonic acid.

[0027] 2. When the urea added into the oleum reaches saturation, the feeding pipe can be automatically closed to prevent excessive urea from affecting the production quality of aminosulfonic acid. When the feeding pipe is closed, it can also prevent the water vapor generated by the reaction from flowing back into the feeding pipe to a certain extent, so as to prevent the urea from being damp and causing deterioration of urea during subsequent use.

[0028] 3. With the compartment design, after the reaction of urea and oleum is completed, the mixed solution containing aminosulfonic acid can be transferred to the lower tank for dilution and cooling. At the same time, the aminosulfonic acid is precipitated from the mixed solution through the coordination of stirring and turbulence, thus reducing the burden of subsequent processing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a dissolving device for producing aminosulfonic acid in the present application; Figure 2 A schematic diagram of the structure of the tank and the stirring shaft is prepared for this application; Figure 3 A cross-sectional view of the tank and agitator shaft was prepared for this application; Figure 4 For this application Figure 3 A partial enlarged view of the middle area A; Figure 5 This is a schematic diagram of the structure of the cam and the first spring pin of the present application; Figure 6 For this application Figure 3 A partial enlarged view of the middle area B; Figure 7 This is a schematic diagram of the structure of the stirring shaft and the linkage shaft of this application.

[0030] Explanation of the accompanying drawings: 1. preparation tank; 11. stirring shaft; 12. driving member; 13. liquid inlet pipe; 14. feeding pipe; 2. valve block; 21. first elastic member; 22. first spring pin; 221. rolling ball; 3. linkage shaft; 31. cam; 32. sleeve; 33. second elastic member; 4. transmission member; 41. driving gear; 42. driven gear; 5. partition; 51. blanking plate; 52. water inlet pipe; 6. locking member; 61. second spring pin; 62. locking hole; 621. transition slope; 63. trigger member; 631. hydraulic oil circuit; 632. push block; 633. sealing gasket; 7. flexible scraper. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 7 , the technical solutions of the embodiments of the present application are clearly and completely described. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0032] Reference Figure 1 and Figure 2 The present embodiment provides a dissolving device for producing aminosulfonic acid, comprising a preparation tank 1, a stirring shaft 11, a driving member 12 and an intermittent feeding mechanism. The stirring shaft 11 is rotatably connected to the inside of the preparation tank 1, the driving member 12 is arranged on the preparation tank 1, and when the driving member 12 runs and drives the stirring shaft 11 to rotate, the stirring shaft 11 can stir the oleum and urea in the preparation tank 1, so that the urea reacts with the oleum and dissolves in the oleum, and the preparation tank 1 is provided with a liquid inlet pipe 13 for introducing oleum and a feeding pipe 14 for feeding urea.

[0033] Among them, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7The intermittent feeding mechanism includes a valve block 2, a first elastic member 21, a first spring pin 22, a linkage shaft 3, a cam 31 and a transmission member 4. The valve block 2 is vertically slidably connected to the open bottom end of the feeding pipe 14 through the first elastic member 21, and the valve block 2 can block the feeding pipe 14. The first spring pin 22 is arranged on the pipe wall of the feeding pipe 14 in a transverse sliding connection manner, and the inclined end face of the right end of the first spring pin 22 abuts against the inclined edge of the upper end of the valve block 2. The linkage shaft 3 is rotatably connected to the inner top wall of the preparation tank 1. The cam 31 is arranged on the linkage shaft 3 and can be abutted by the first spring pin 22. The transmission member 4 is arranged between the stirring shaft 11 and the linkage shaft 3, and is used to make the linkage shaft 3 rotate synchronously with the stirring shaft 11. The transmission member 4 includes a driving gear 41 and a driven gear 42. The driving gear 41 is fixedly sleeved on the stirring shaft 11, and the driven gear 42 is fixedly sleeved on the linkage shaft 3. The driving gear 41 is meshed with the driven gear 42. When the driving member 12 drives the stirring shaft 11 to rotate, the linkage shaft 3 will rotate accordingly under the transmission cooperation of the driving gear 41 and the driven gear 42.

[0034] The personnel firstly pass the oleum into the preparation tank 1 through the liquid inlet pipe 13, and then put the urea into the preparation tank 1 through the feeding pipe 14. During the process of putting the urea, the driving member 12 drives the stirring shaft 11 to rotate to initially stir the oleum. At the same time, with the cooperation of the transmission member 4, the linkage shaft 3 drives the cam 31 to rotate with the stirring shaft 11. When the distal arc surface of the cam 31 abuts against the left end of the first spring pin 22, the first spring pin 22 will move to the right and press the valve block 2 downward, so that the valve block 2 overcomes the elastic potential energy of the first elastic member 21 and moves downward. At this time, urea can enter the preparation tank 1 from the gap between the valve block 2 and the feeding pipe 14; on the contrary, when the proximal arc surface of the cam 31 abuts against the left end of the first spring pin 22, the first spring pin 22 and the first elastic member 21 cooperate to drive the valve block 2 to move up and reset, so that the valve block 2 blocks the bottom opening of the feeding pipe 14 again. As the cam 31 continues to rotate, the valve block 2 will be in a reciprocating lifting process to achieve intermittent feeding of urea. At the same time, the disturbance effect generated by the stirring shaft 11 can make the urea dissolve in the oleum more stably and evenly.

[0035] Reference Figure 4 and Figure 5 The bottom end of the linkage shaft 3 is vertically slidably connected to a sleeve 32 via a second elastic member 33 , and the cam 31 is fixedly sleeved outside the sleeve 32 .

[0036] When urea reacts with oleum to generate heat, the air pressure inside the preparation tank 1 will gradually rise, and the sleeve 32 will overcome the elastic potential energy of the second elastic member 33 as the air pressure rises and drive the cam 31 to move upward until the cam 31 no longer abuts against the first spring pin 22. At this time, the valve block 2 will be in a normally closed state to prevent the continued addition of urea.

[0037] In addition, refer to Figure 4 and Figure 5 The lower edge of the cam 31 is tilted inward from top to bottom, and a rolling ball 221 capable of abutting against the cam 31 is provided at the left end of the first spring pin 22 .

[0038] When the sleeve 32 and the cam 31 are moved downward and reset due to the elastic potential energy of the second elastic member 33, the rolling ball 221 can replace the first spring pin 22 to abut against the inclined edge of the cam 31 to prevent the cam 31 from being blocked and interfered by the first spring pin 22 when moving downward and reset.

[0039] Reference Figure 1 , Figure 2 and Figure 3 The preparation tank 1 is provided with a partition mechanism in the middle thereof, which is used to separate the mixed solution containing aminosulfonic acid in the preparation tank 1 into compartments. The partition mechanism includes a partition plate 5, a blanking plate 51, a water inlet pipe 52 and a locking member 6 (refer to Figure 6 ), the partition 5 is arranged in the middle of the preparation tank 1, the blanking plate 51 is hinged at the blanking port opened on the partition 5 through a torsion spring, and the water inlet pipe 52 is connected to the lower tank body of the preparation tank 1 and can be used for external cold water injection; the locking member 6 is arranged between the partition 5 and the blanking plate 51, and is used to lock the position of the blanking plate 51 or unlock the position of the blanking plate 51.

[0040] When the reaction of urea and oleum is completed, the blanking plate 51 is opened by the cooperation of the locking member 6, and the mixed solution containing aminosulfonic acid will enter the lower tank body in the preparation tank 1. Since the solubility of aminosulfonic acid will decrease with the decrease of temperature, when personnel pass external cold water into the lower tank body in the preparation tank 1 through the water inlet pipe 52 to dilute the mixed solution containing aminosulfonic acid, aminosulfonic acid will gradually precipitate from the mixed solution, and in this process, the stirring shaft 11 can still stir the mixed solution, which is beneficial to the precipitation of aminosulfonic acid, thereby reducing the burden of subsequent processing work.

[0041] Among them, refer to Figure 2 , Figure 3 , Figure 4 and Figure 6The locking member 6 includes a second spring pin 61, a locking hole 62 and a trigger member 63. The second spring pin 61 is arranged on the blanking plate 51, and the locking hole 62 is provided on the partition 5 and can be inserted into the second spring pin 61; the trigger member 63 includes a hydraulic oil circuit 631 and a push block 632, the hydraulic oil circuit 631 is arranged between the partition 5 and the sleeve 32, and the two ends of the hydraulic oil circuit 631 are respectively connected to the locking hole 62 and the inner cavity of the sleeve 32, and the push block 632 is slidably connected to the inside of the locking hole 62 and can push the second spring pin 61 out of the locking hole 62.

[0042] During the rising process of the sleeve 32, its internal volume will gradually decrease. At this time, through the cooperation of the hydraulic oil circuit 631, as the internal volume of the sleeve 32 decreases, the push block 632 will gradually move toward the outside of the locking hole 62 under the action of the hydraulic oil inside the hydraulic oil circuit 631, until the push block 632 pushes the second spring pin 61 out of the locking hole 62, thereby completing the unlocking work of the blanking plate 51.

[0043] In addition, refer to Figure 6 A transition slope 621 matching the second spring pin 61 is provided at the lower edge of the locking hole 62 .

[0044] When the blanking plate 51 is reset under the action of the torsion spring and blocks the blanking opening on the partition 5, the transition slope 621 can provide a guiding effect for the second spring pin 61, prompting the second spring pin 61 to retract moderately and align with the locking hole 62, so as to prevent the blanking plate 51 from being unable to reset normally due to the interference of the second spring pin 61.

[0045] In addition, refer to Figure 6 A sealing gasket 633 that matches the inner cavity of the locking hole 62 is provided at the edge of the push block 632.

[0046] With the help of the sealing gasket 633 , the push block 632 can push the mixed solution that may exist in the locking hole 62 out of the locking hole 62 when it moves, so as to prevent the locking hole 62 from being blocked by the mixed solution and affecting the insertion of the second spring pin 61 .

[0047] Reference Figure 2 and Figure 3 A flexible scraper 7 located above the partition 5 is provided on the stirring shaft 11 , and the flexible scraper 7 can abut against the upper surface of the partition 5 .

[0048] During the rotation of the stirring shaft 11 , the flexible scraper 7 will rotate along with the stirring shaft 11 to scrape off the residual mixed solution on the upper surface of the partition 5 , so that the mixed solution containing aminosulfonic acid can effectively participate in the subsequent treatment work.

[0049] The implementation principle of a dissolving device for producing aminosulfonic acid in the embodiment of the present application is as follows: When carrying out the production of aminosulfonic acid, the personnel first pass oleum into the preparation tank 1 through the liquid inlet pipe 13, and then feed urea into the preparation tank 1 through the feeding pipe 14. During the process of feeding urea, the driving member 12 runs and drives the stirring shaft 11 to rotate, so that the stirring shaft 11 can stir the oleum and urea in the preparation tank 1, so as to cause the urea to react with the oleum and dissolve in the oleum. At the same time, with the cooperation of the transmission member 4, the linkage shaft 3 will drive the cam 31 to rotate together with the stirring shaft 11.

[0050] When the distal arc surface of the cam 31 abuts against the left end of the first spring pin 22, the first spring pin 22 will move to the right and apply downward pressure to the valve block 2, so that the valve block 2 overcomes the elastic potential energy of the first elastic member 21 and moves downward. At this time, urea can enter the preparation tank 1 from the gap between the valve block 2 and the feeding pipe 14; conversely, when the proximal arc surface of the cam 31 abuts against the left end of the first spring pin 22, the first spring pin 22 and the first elastic member 21 cooperate to drive the valve block 2 to move up and reset, so that the valve block 2 again blocks the bottom opening of the feeding pipe 14.

[0051] As the cam 31 continues to rotate, the valve block 2 will be in a reciprocating lifting process to achieve intermittent feeding of urea. At the same time, the disturbance effect generated by the stirring shaft 11 can make the urea dissolve in the oleum more stably and evenly.

[0052] In addition, when urea reacts with oleum to generate heat, the air pressure inside the preparation tank 1 will gradually rise, and the sleeve 32 will overcome the elastic potential energy of the second elastic member 33 as the air pressure rises and drive the cam 31 to move upward until the cam 31 no longer abuts against the first spring pin 22. At this time, the valve block 2 will be in a normally closed state to prevent the continued addition of urea.

[0053] When the reaction of urea and fuming sulfuric acid is completed, the sleeve 32 rises to the highest point, and its internal volume is reduced to the limit state. At this time, with the cooperation of the hydraulic oil circuit 631, as the internal volume of the sleeve 32 is reduced, the push block 632 will gradually move toward the outside of the locking hole 62 under the action of the hydraulic oil inside the hydraulic oil circuit 631, until the push block 632 pushes the second spring pin 61 out of the locking hole 62, thereby completing the unlocking of the blanking plate 51, and then under the influence of the gravity of the mixed solution containing aminosulfonic acid, the blanking plate 51 will open downward to allow the mixed solution containing aminosulfonic acid to enter the lower tank body in the preparation tank 1.

[0054] Since the solubility of sulfamic acid decreases with the decrease of temperature, when an operator dilutes the mixed solution containing sulfamic acid by introducing external cold water into the lower tank of the preparation tank 1 through the water inlet pipe 52, sulfamic acid will gradually precipitate from the mixed solution. During this process, the stirring shaft 11 can still stir the mixed solution, which is conducive to the precipitation of sulfamic acid, thereby reducing the burden of subsequent treatment work.

[0055] After the precipitated sulfamic acid and the dilution solution remaining in the lower tank of the preparation tank 1 are discharged, the blanking plate 51 flips upward and resets under the action of the torsion spring, thereby blocking the blanking port opened on the partition plate 5. At this time, the second spring pin 61 will insert into the locking hole 62 to complete the locking and limiting of the blanking plate 51, so that the preparation tank 1 can be put into subsequent use.

[0056] The above is the preferred implementation mode of the present application. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle described in the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A dissolving device for producing aminosulfonic acid, comprising a preparation tank (1) and a stirring shaft (11) arranged therein, wherein the preparation tank (1) is provided with a liquid inlet pipe (13), a feeding pipe (14) and a driving member (12) for driving the stirring shaft (11) to rotate, characterized in that: The bottom open end of the feeding pipe (14) is vertically slidably connected to a valve block (2) capable of blocking the feeding pipe (14) via a first elastic member (21); a first spring pin (22) capable of lateral sliding is provided through the wall of the feeding pipe (14); the inclined end surface of the right end of the first spring pin (22) abuts against the inclined edge of the upper end of the valve block (2); a linkage shaft (3) is rotatably connected to the top wall of the preparation tank (1); and a cam (31) capable of being abutted by the first spring pin (22) is provided on the linkage shaft (3); A transmission member (4) is provided between the stirring shaft (11) and the linkage shaft (3), and is used to enable the linkage shaft (3) to rotate synchronously with the stirring shaft (11).

2. A dissolving device for producing aminosulfonic acid according to claim 1, characterized in that: The bottom end of the linkage shaft (3) is vertically slidably connected to a sleeve (32) via a second elastic member (33), and the cam (31) is fixedly sleeved outside the sleeve (32).

3. A dissolving device for producing sulfamic acid according to claim 2, characterized in that: The lower edge of the cam (31) is arranged to be inclined inward from top to bottom, and a rolling ball (221) capable of abutting against the cam (31) is arranged at the left end of the first spring pin (22).

4. A dissolving device for producing aminosulfonic acid according to claim 1, characterized in that: The transmission member (4) comprises a driving gear (41) arranged on the stirring shaft (11) and a driven gear (42) arranged on the linkage shaft (3), and the driving gear (41) is meshingly connected with the driven gear (42).

5. A dissolving device for producing aminosulfonic acid according to claim 2, characterized in that: A partition (5) is provided in the middle of the preparation tank (1), and a blanking plate (51) is hingedly connected to a blanking opening on the partition (5) via a torsion spring. A locking member (6) is provided between the partition (5) and the blanking plate (51), and the locking member (6) is used to lock the position of the blanking plate (51) or unlock the position of the blanking plate (51). A water inlet pipe (52) for injecting external cold water is connected to the lower tank body of the preparation tank (1).

6. A dissolving device for producing aminosulfonic acid according to claim 5, characterized in that: The locking member (6) comprises a second spring pin (61) provided on the blanking plate (51), a locking hole (62) for inserting the second spring pin (61) is provided on the partition plate (5), and a trigger member (63) for pulling the second spring pin (61) out of the locking hole (62) is provided between the partition plate (5) and the sleeve (32).

7. A dissolving device for producing aminosulfonic acid according to claim 6, characterized in that: The trigger member (63) comprises a hydraulic oil circuit (631) arranged between the partition plate (5) and the sleeve (32), and the two ends of the hydraulic oil circuit (631) are respectively connected to the locking hole (62) and the inner cavity of the sleeve (32), and a push block (632) capable of pushing the second spring pin (61) out of the locking hole (62) is arranged inside the locking hole (62).

8. A dissolving device for producing aminosulfonic acid according to claim 6, characterized in that: A transition slope (621) matching the second spring pin (61) is provided at the lower edge of the locking hole (62).

9. A dissolving device for producing aminosulfonic acid according to claim 7, characterized in that: A sealing gasket (633) is provided at the edge of the push block (632) and matches the inner cavity of the locking hole (62).

10. A dissolving device for producing aminosulfonic acid according to claim 5, characterized in that: The stirring shaft (11) is provided with a flexible scraper (7) located above the partition (5), and the flexible scraper (7) is capable of abutting against the upper surface of the partition (5).

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