Sulfamic acid preparation device

Abstract

The invention provides a sulfamic acid preparation device, and particularly relates to the technical field of sulfamic acid preparation, in particular to a reaction device for generating sulfamic acid, the reaction device is connected with a pre-cooling structure, the pre-cooling structure is connected with a refrigerator body, and the refrigerator body is connected to the outer side of a buffer cylinder in an up-down sliding mode. A filter plate is arranged on the inner side of the refrigerator body in an up-down sliding manner; a piston plate is arranged on the inner side of the buffer cylinder in an up-down sliding manner; the piston plate is connected with a discharging structure used for discharging sulfamic acid, the discharging structure penetrates through the filter plate and is connected with a heat exchange structure, and the heat exchange structure is connected to the conveying filter assembly and further connected with a pre-cooling structure; and a discharging structure is arranged at the bottom end of the temporary storage barrel. The sulfamic acid preparation device provided by the invention can improve the crystallization efficiency of sulfamic acid, increase the filtration and separation efficiency of crude sulfamic acid, improve the cooling efficiency of a sulfamic acid crude product solution, reduce the energy consumption of a refrigerator and realize sufficient solid-liquid separation of sulfamic acid.

Description

Technical Field

[0001] The invention belongs to the technical field of aminosulfonic acid preparation, and in particular relates to an aminosulfonic acid preparation device. Background Art

[0002] Aminosulfonic acid (H2NSO3H) is a monobasic solid strong acid, soluble in water and liquid ammonia, insoluble in ethanol, with low corrosiveness, non-volatile, odorless and extremely low toxicity to the human body. In industry, aminosulfonic acid is used as an acid cleaning agent, flame retardant, sulfonating agent, etc., and in agriculture as a herbicide, pesticide, etc., with a wide range of uses. The large-scale production process of conventional aminosulfonic acid is as follows: urea and oleum are added to a reactor and stirred and mixed, so that urea is dissolved in oleum, and the dissolution temperature is controlled at 30-40°C; when the urea is completely dissolved, the reaction temperature is raised to 80-85°C, and the reaction is kept warm for 3-4 hours to generate crude aminosulfonic acid and carbon dioxide. The crude product is diluted, recrystallized, filtered and dried to obtain a finished aminosulfonic acid with a purity of at least 99.5%.

[0003] However, in the traditional solid-liquid separation process of crude aminosulfonic acid, there are several technical problems as follows:

[0004] (1) When the crude aminosulfonic acid solution at a relatively high temperature enters the refrigerator, the temperature drops significantly, which reduces the cooling efficiency and increases the energy consumption of the refrigerator. Therefore, it is necessary to improve the cooling efficiency of the crude aminosulfonic acid solution and reduce the energy consumption of the refrigerator.

[0005] (2) In the solid-liquid separation process of crude aminosulfonic acid, the prior art generally places the crude aminosulfonic acid and liquid phase mixture in a volumetric tank, first centrifuges or settles for a long time, and then manually siphons off the liquid phase. This is inefficient and has a long production cycle. In addition, part of the crude aminosulfonic acid may dissolve back into the liquid phase, resulting in incomplete solid-liquid separation.

[0006] The present application proposes a device for preparing aminosulfonic acid, which is used to simultaneously solve the above-mentioned technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a sulfamic acid preparation device, which solves the technical problems of how to improve the crystallization efficiency of sulfamic acid and increase the filtering and separation efficiency of crude sulfamic acid, improves the cooling efficiency of the crude sulfamic acid solution, reduces the energy consumption of the refrigerator, and realizes sufficient solid-liquid separation of sulfamic acid.

[0008] A sulfamic acid preparation device, a reaction device for generating sulfamic acid, the reaction device is connected to a pre-cooling structure, the pre-cooling structure is connected to a refrigerator body, the refrigerator body is slidably connected to the outside of a buffer cylinder, a filter plate is slidably provided on the inside of the refrigerator body, and a piston plate is slidably provided on the inside of the buffer cylinder;

[0009] The piston plate is connected to a discharge structure for discharging aminosulfonic acid, the discharge structure is arranged through the filter plate, the discharge structure is connected to a heat exchange structure, the heat exchange structure is connected to a conveying and filtering component, the heat exchange structure is also connected to the pre-cooling structure, and a drying device is arranged on the conveying and filtering component;

[0010] A discharge structure is arranged at the bottom end of the buffer cylinder, and the discharge structure is arranged above the conveying and filtering assembly.

[0011] It should be noted that the reaction device described in this scheme is actually a preparation process in which urea and oleum are put into a reactor, and after dilution, they enter the pre-cooling structure and then enter the refrigerator body. The working principle and dilution process of the reaction device are both existing technologies and will not be described in detail here.

[0012] Two lifting cylinders are vertically arranged on both sides of the refrigerator body, and the buffer cylinder includes a column part and a conical part coaxially fixed at the bottom end of the column part. The column part is slidably connected to the inner side of the refrigerator body up and down to form a piston structure, and the lower end of the conical part is fixedly connected to a vertically arranged support column;

[0013] The upper edge of the column portion is provided with a chamfer, and the upper edge of the chamfer is attached to the inner side surface of the refrigerator body.

[0014] The discharge structure includes a suction pipe, a bellows connected to one end of the suction pipe, a baffle coaxially fixed to the outside of the bellows, and saw teeth arranged in a ring array on the outer edge of the other end of the bellows. The bellows extends into the interior of the refrigerator body, the other end of the suction pipe is connected to a suction pump, and a solenoid valve 1 is arranged on the suction pipe.

[0015] The piston plate is horizontally slidably arranged inside the cylindrical portion, the bottom end of the piston plate is connected to a vertically arranged lifting cylinder 1, and the free end of the lifting cylinder 1 extends into the conical portion;

[0016] The upper end surface of the piston plate is a conical surface, the tip of the conical surface is arranged upward, and the tip is fixedly connected to the saw teeth on the bellows.

[0017] The filter plate is horizontally slidably arranged on the inner side of the refrigerator body, and the upper end surface of the filter plate is fixedly connected to the free end of the lifting cylinder three, and the lifting cylinder three is vertically connected to the top of the refrigerator body;

[0018] A through hole is provided at the center of the filter plate, and the inner diameter of the through hole is larger than the outer diameter of the bellows and smaller than the outer diameter of the baffle.

[0019] The conveying and filtering assembly comprises a horizontally arranged conveyor belt, rollers respectively arranged at both ends of the conveyor belt, a driving motor connected to one of the rollers, and a support box arranged inside the conveyor belt, the conveyor belt has two and a filter belt is fixedly arranged between the two, the rollers are rotatably connected to the roller frame, and the two ends of the support box are respectively fixed to the two roller frames;

[0020] The inner side of the support box is provided with a containing space, and a plurality of support bars are arranged in a linear array, and the inner side of the filter belt is in contact with the support bars.

[0021] The heat exchange structure includes a ventilation pipe with one end connected to the outside of the suction pipe, a heat exchange tube with one end connected to an air pump and one end connected to the air pump, the heat exchange tube passes through the support box horizontally in a broken line, a solenoid valve 2 is provided on the ventilation pipe, and the other end of the heat exchange tube is a free end extending into the atmosphere.

[0022] The precooling structure includes a precooling pool, a precooling cylinder arranged inside the precooling pool, a feed pipe connected to the precooling cylinder at one end, a discharge pipe connected to the precooling pool at one end, and a liquid inlet pipe connected to the precooling cylinder at one end, the other end of the feed pipe is connected to the reaction device, and the other end of the liquid inlet pipe is connected to the upper end of the refrigerator body.

[0023] The discharging structure includes a discharging barrel coaxially connected to the bottom end of the conical portion, an adjusting cylinder slidably connected to the bottom end of the discharging barrel, and a discharging pipe with one end connected to the outside of the discharging barrel. A solenoid valve three is provided on the discharging pipe, and the other end of the discharging pipe is located above the conveyor belt.

[0024] A waterproof high-definition camera is arranged on the filter plate, and the waterproof high-definition camera is fixedly connected to one end of a video cable, and the other end of the video cable extends out of the top of the refrigerator body and is connected to a display screen.

[0025] The beneficial effects of the present invention are as follows:

[0026] (1) The discharge structure is provided, and cooperates with the piston plate, which has the following technical effects:

[0027] First, when a large amount of aminosulfonic acid crystallizes, it will be crystallized and precipitated on the piston plate. At this time, gas is introduced into the vent pipe, and the gas enters the bellows through the suction pipe, and at the connection position between the bellows and the piston plate, the gas passes through the fine holes at the sawtooth position, flushing the aminosulfonic acid deposited on the piston plate and causing it to fall into the buffer cylinder;

[0028] Second, when the aminosulfonic acid crystals are completed and deposited on the piston plate, the lifting cylinder 1 is started to drive the piston plate to rise, so that the piston plate is separated from the buffer cylinder, so that there is a gap between the outer edge of the piston plate and the chamfer, so that the aminosulfonic acid crystals are washed into the gap and enter the buffer cylinder;

[0029] Third, when all the aminosulfonic acid crystals enter the buffer cylinder, the suction tube is started to suck out the liquid above the filter plate. At this time, the fine holes at the sawtooth position also have the function of suction;

[0030] (2) A bellows is provided, and a baffle is provided on the bellows, which interacts with the filter plate and the piston plate, and has the following technical effects:

[0031] First, the filter plate moves downward, close to the aminosulfonic acid crystals. At this time, under the flushing effect of the sawtooth position, the amount of liquid entering the buffer cylinder can be reduced as much as possible;

[0032] Second, the bellows can be telescopically moved up and down, which is convenient for adaptive adjustment according to the actual position of the filter plate. The through hole set in the center of the filter plate is larger than the outer diameter of the bellows, which helps to increase the movement speed of the filter plate. The inner diameter of the through hole is smaller than the outer diameter of the baffle, so that the baffle can be blocked at the position of the through hole, preventing the aminosulfonic acid crystals from being washed into the buffer cylinder and entering the top of the filter plate through turbulence;

[0033] (3) A conveying and filtering component is provided to cooperate with the drying equipment. On the one hand, after the aminosulfonic acid crystals flow out from the discharge barrel, they enter the conveyor belt and pass through the filter belt, so that the liquid enters the support box; on the other hand, driven by the filter belt, they enter the drying equipment and then enter the next process;

[0034] (4) A support box is provided, which, on the one hand, supports the conveyor belt and the filter belt to ensure the smooth progress of the conveying process, and on the other hand, receives and holds the filtrate. At this time, the temperature of the filtrate is very low. In conjunction with the heat exchange tube, cold air enters the suction pipe and the bellows. The cold air enters the aminosulfonic acid solution through the fine holes at the sawtooth position, which helps to accelerate the cooling of the liquid and speed up the crystallization process.

[0035] (5) The purpose of providing the pre-cooling pool and the pre-cooling cylinder is to contain the filtrate in the support box to prevent the filtrate from overflowing from the support box, and at the same time, to pass the aminosulfonic acid solution into the pre-cooling cylinder for buffering, which helps to pre-cool the aminosulfonic acid solution and facilitate the rapid cooling of the aminosulfonic acid solution in the refrigerator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view of the aminosulfonic acid preparation device of the present invention.

[0037] Figure 2 It is a stereoscopic diagram of the aminosulfonic acid preparation device of the present invention.

[0038] Figure 3 It is a schematic diagram of the external connection structure of the refrigerator body and the buffer cylinder in the present invention.

[0039] Figure 4 It is a schematic diagram of the internal connection structure of the refrigerator body and the buffer cylinder in the present invention.

[0040] Figure 5 It is a schematic diagram of the connection structure of the piston plate, the filter plate and the bellows in the present invention.

[0041] Figure 6 It is a schematic diagram of the connection structure of the buffer cylinder, the piston plate and the bellows in the present invention.

[0042] Figure 7 It is a structural schematic diagram of the connection between the support box and the heat exchange tube in the present invention.

[0043] Figure 8 It is a schematic diagram of the connection structure of the precooling tank and the precooling cylinder in the present invention.

[0044] Among them, the figure markings are: 1. conveyor belt; 2. support box; 21. support bar; 22. containing tank; 3. heat exchange tube; 4. lifting cylinder one; 5. discharge barrel; 51. regulating cylinder; 6. discharge pipe; 7. lifting cylinder two; 8. support column; 9. buffer barrel; 91. piston plate; 92. chamfer; 10. refrigerator body; 101. filter plate; 11. ventilation pipe; 12. suction pipe; 121. bellows; 122. baffle; 123. fine hole; 13. lifting cylinder three; 14. video line; 15. top cover; 16. liquid inlet pipe; 17. precooling tank; 171. precooling barrel; 172. drain pipe; 18. drying equipment; 19. feed pipe. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0046] See also Figure 1-Figure 8A sulfamic acid preparation device, a reaction device for generating sulfamic acid, the reaction device is connected to a pre-cooling structure, the pre-cooling structure is connected to a refrigerator body 10, the refrigerator body 10 is connected to the outside of a buffer cylinder 9 by sliding up and down, a filter plate 101 is provided on the inside of the refrigerator body 10 for sliding up and down, and a piston plate 91 is provided on the inside of the buffer cylinder 9 for sliding up and down;

[0047] The piston plate 91 is connected to a discharge structure for discharging aminosulfonic acid, the discharge structure is arranged through the filter plate 101, the discharge structure is connected to a heat exchange structure, the heat exchange structure is connected to the conveying and filtering assembly, the heat exchange structure is also connected to a pre-cooling structure, and a drying device 18 is arranged on the conveying and filtering assembly;

[0048] The bottom end of the buffer cylinder 9 is provided with a discharge structure, and the discharge structure is arranged above the conveying and filtering assembly.

[0049] A lifting cylinder 7 is vertically arranged on both sides of the refrigerator body 10, and the buffer cylinder 9 includes a columnar portion and a conical portion coaxially fixed to the bottom end of the columnar portion. The columnar portion is slidably connected to the inner side of the refrigerator body 10 up and down to form a piston structure, and the lower end of the conical portion is fixedly connected to the vertically arranged support column 8;

[0050] The upper edge of the column portion is provided with a chamfer 92 , and the upper edge of the chamfer 92 is in contact with the inner side surface of the refrigerator body 10 .

[0051] A top cover 15 is fixedly and closedly provided on the top of the refrigerator body 10 .

[0052] The discharge structure includes a suction pipe 12, a bellows 121 having one end connected to the other end of the suction pipe 12, a baffle 122 coaxially fixed to the outside of the bellows 121, and saw teeth arranged in a ring array on the outer edge of the other end of the bellows 121. The bellows 121 extends into the interior of the refrigerator body 10, the other end of the suction pipe 12 is connected to the suction pump, and a solenoid valve 1 is arranged on the suction pipe 12.

[0053] The piston plate 91 is horizontally slidably arranged inside the column tube portion, and the bottom end of the piston plate 91 is connected to a vertically arranged lifting cylinder 4, and the free end of the lifting cylinder 4 extends into the conical portion;

[0054] The upper end surface of the piston plate 91 is a conical surface, the tip of which is arranged upward, and the tip is fixedly connected to the saw teeth on the bellows 121 .

[0055] The filter plate 101 is horizontally slidably arranged on the inner side of the refrigerator body 10, and the upper end surface of the filter plate 101 is fixedly connected to the free end of the lifting cylinder 3 13, and the lifting cylinder 3 13 is vertically connected to the top of the refrigerator body 10;

[0056] A through hole is disposed at the center of the filter plate 101 , and the inner diameter of the through hole is larger than the outer diameter of the bellows 121 and smaller than the outer diameter of the baffle 122 .

[0057] The conveying and filtering assembly comprises a horizontally arranged conveyor belt 1, rollers respectively arranged at both ends of the conveyor belt 1, a driving motor connected to one of the rollers, and a support box 2 arranged inside the conveyor belt 1. The conveyor belt 1 has two and a filter belt is fixedly arranged between the two. The rollers are rotatably connected to the roller frame, and the two ends of the support box 2 are respectively fixed to the two roller frames.

[0058] The inner side of the support box 2 is provided with a receiving groove 22 , and a plurality of support bars 21 are arranged in a linear array, and the inner side of the filter belt is in contact with the support bars 21 .

[0059] The heat exchange structure includes a ventilation pipe 11 with one end connected to the outside of the suction pipe 12, a heat exchange pipe 3 with one end connected to the air pump and one end connected to the air pump. The heat exchange pipe 3 passes through the support box 2 horizontally in a broken line. The ventilation pipe 11 is provided with a solenoid valve 2, and the other end of the heat exchange pipe 3 is a free end extending into the atmosphere.

[0060] The precooling structure includes a precooling pool 17, a precooling cylinder 171 arranged inside the precooling pool 17, a feed pipe 19 connected to the precooling cylinder 171 at one end, a discharge pipe 172 connected to the precooling pool 17 at one end, and a liquid inlet pipe 16 connected to the precooling cylinder 171 at one end. The other end of the feed pipe 19 is connected to the reaction device, and the other end of the liquid inlet pipe 16 is connected to the upper end of the refrigerator body 10.

[0061] The feed pipe 19 is used to connect the reaction device. To simplify the design, the reaction device will not be marked in detail; the function of the drain pipe 172 is to guide the liquid in the pre-cooling tank 17 to the waste liquid tank for treatment.

[0062] The discharging structure includes a discharging barrel 5 coaxially connected to the bottom end of the conical part, an adjusting cylinder 51 slidably connected to the bottom end of the discharging barrel 5, a discharging pipe 6 with one end connected to the outside of the discharging barrel 5, and a solenoid valve 3 is provided on the discharging pipe 6. The other end of the discharging pipe 6 is located above the conveyor belt 1.

[0063] When the free end of the regulating cylinder 51 descends, the discharging barrel 5 and the discharging pipe 6 are connected, and the aminosulfonic acid crystals enter into the discharging barrel 5 and flow out therefrom.

[0064] A waterproof high-definition camera is provided on the filter plate 101, and the waterproof high-definition camera is fixedly connected to one end of the video line 14, and the other end of the video line 14 extends out of the top of the refrigerator body 10 and is connected to the display screen.

[0065] It should be noted that acid-resistant, high-temperature-resistant, and low-temperature-resistant glass material protection can be provided on the waterproof high-definition camera, which will not be described in detail here.

[0066] The specific working process of the present invention is as follows:

[0067] After the sulfamic acid solution is prepared, it is passed from the reaction device into the precooling cylinder 171 for buffering. The space between the precooling tank 17 and the precooling cylinder 171 accommodates the filtered cold liquid derived from the support box 2, which can precool the sulfamic acid solution.

[0068] After a certain period of time, the aminosulfonic acid solution in the precooling cylinder 171 is introduced into the refrigerator body 10 through the liquid inlet pipe 16. The liquid inlet pipe 16 is provided with a liquid pump. Under the action of the liquid pump, the aminosulfonic acid solution is sucked into the refrigerator body 10. At this time, the filter plate 101 is at the top of the refrigerator body 10. When the aminosulfonic acid solution completely enters the refrigerator body 10 and the crystallization is completed, the filter plate 101 can be lowered under the action of the lifting cylinder 13;

[0069] A discharge structure is provided to cooperate with the piston plate 91. When a large amount of aminosulfonic acid crystallizes, it will fall on the piston plate 91. At this time, gas is introduced into the vent pipe 11, and the gas enters the bellows 121 through the suction pipe 12. At the position where the bellows 121 and the piston plate 91 are connected, the gas passes through the fine holes 123 at the sawtooth position to flush the aminosulfonic acid deposited on the piston plate 91, so that it falls into the buffer cylinder 9.

[0070] When the aminosulfonic acid crystals are completed and deposited on the piston plate 91, the lifting cylinder 4 is started to drive the piston plate 91 to rise, so that the piston plate 91 is separated from the buffer cylinder 9, so that there is a gap between the outer edge of the piston plate 91 and the chamfer 92, and the upper end surface of the piston plate 91 is a conical surface, which facilitates the aminosulfonic acid crystals to be washed into the gap and enter the buffer cylinder 9. The purpose of designing the chamfer 92 is that when the aminosulfonic acid crystals are washed onto the inner side of the refrigerator body 10, they can directly fall into the gap along the chamfer 92 and then enter the buffer cylinder 9;

[0071] When all the aminosulfonic acid crystals enter the buffer cylinder 9, the liquid above the filter plate 101 drops to the bottom of the filter plate 101, and the suction pipe 12 is started to suck out the liquid above the filter plate 101. At this time, the fine holes 123 formed at the sawtooth position also have the function of suction;

[0072] A bellows 121 is provided, and a baffle 122 is vertically fixed on the side of the bellows 121, which interacts with the filter plate 101 and the piston plate 91. The filter plate 101 moves downward, approaches the aminosulfonic acid crystals, and gradually contacts the baffle 122. The baffle 122 blocks the through hole in the center of the filter plate 101. At this time, under the flushing effect of the sawtooth position, the amount of liquid entering the buffer cylinder 9 can be reduced as much as possible, and the aminosulfonic acid crystals are prevented from passing through the through holes of the filter plate 101 in a turbulent state and entering the top of the filter plate 101.

[0073] The bellows 121 can move up and down, which is convenient for adaptive adjustment according to the actual position of the filter plate 101. The through hole set in the center of the filter plate 101 is larger than the outer diameter of the bellows 121, which helps to increase the movement speed of the filter plate 101. The inner diameter of the through hole is smaller than the outer diameter of the baffle 122, so that the baffle 122 can be blocked at the position of the through hole, preventing the aminosulfonic acid crystals from being washed into the buffer cylinder 9 and entering the top of the filter plate 101 through turbulence;

[0074] A conveying and filtering component is provided, which cooperates with a drying device 18. On the one hand, after the aminosulfonic acid crystals flow out from the discharge barrel 5, they enter the conveyor belt 1, and pass through the filter belt, so that the liquid enters the support box 2; on the other hand, driven by the filter belt, they enter the drying device 18, and then enter the next program; wherein, the filter belt is made of a flexible material and has the function of blocking the aminosulfonic acid crystals.

[0075] A support box 2 is provided, which, on the one hand, supports the conveyor belt 1 and the filter belt to ensure the smooth progress of the conveying process, and on the other hand, receives and holds the filtrate. At this time, the temperature of the filtrate is very low. In conjunction with the heat exchange tube 3, cold air enters the suction tube 12 and the bellows 121. The cold air passes through the fine holes 123 at the serrated position and enters the aminosulfonic acid solution, which helps to accelerate the cooling of the liquid and speed up the crystallization process.

[0076] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A sulfamic acid preparation device, a reaction device for generating sulfamic acid, characterized in that: The reaction device is connected to the pre-cooling structure, the pre-cooling structure is connected to the refrigerator body (10), the refrigerator body (10) is connected to the outside of the buffer cylinder (9) by sliding up and down, a filter plate (101) is provided on the inside of the refrigerator body (10) for sliding up and down, and a piston plate (91) is provided on the inside of the buffer cylinder (9) for sliding up and down; The piston plate (91) is connected to a discharge structure for discharging aminosulfonic acid, the discharge structure is arranged through the filter plate (101), the discharge structure is connected to a heat exchange structure, the heat exchange structure is connected to a conveying and filtering component, the heat exchange structure is also connected to the pre-cooling structure, and a drying device (18) is arranged on the conveying and filtering component; A discharge structure is provided at the bottom end of the buffer cylinder (9), and the discharge structure is arranged above the conveying and filtering assembly.

2. A sulfamic acid preparation device according to claim 1, characterized in that: Two lifting cylinders (7) are respectively arranged vertically on both sides of the refrigerator body (10); the buffer cylinder (9) comprises a columnar portion and a conical portion coaxially fixed to the bottom end of the columnar portion; the columnar portion is slidably connected to the inner side of the refrigerator body (10) up and down to form a piston structure; the lower end of the conical portion is fixedly connected to a vertically arranged support column (8); The upper edge of the column portion is provided with a chamfer (92), and the upper edge of the chamfer (92) is fitted onto the inner side surface of the refrigerator body (10).

3. A sulfamic acid preparation device according to claim 2, characterized in that: The discharge structure comprises a suction pipe (12), a bellows (121) having one end connected to another end of the suction pipe (12), a baffle (122) coaxially fixed to the outside of the bellows (121), and saw teeth arranged in a ring array on the outer edge of the other end of the bellows (121); the bellows (121) extends into the interior of the refrigerator body (10); the other end of the suction pipe (12) is connected to a suction pump; and a solenoid valve 1 is arranged on the suction pipe (12).

4. A sulfamic acid preparation device according to claim 3, characterized in that: The piston plate (91) is horizontally slidably arranged inside the cylindrical portion, the bottom end of the piston plate (91) is connected to a vertically arranged lifting cylinder (4), and the free end of the lifting cylinder (4) extends into the conical portion; The upper end surface of the piston plate (91) is a conical surface, the tip of the conical surface is arranged upward, and the tip is fixedly connected to the saw teeth on the bellows (121).

5. A sulfamic acid preparation device according to claim 3, characterized in that: The filter plate (101) is horizontally slidably arranged on the inner side surface of the refrigerator body (10), the upper end surface of the filter plate (101) is fixedly connected to the free end of the lifting cylinder three (13), and the lifting cylinder three (13) is vertically connected to the top of the refrigerator body (10); A through hole is provided at the center of the filter plate (101), and the inner diameter of the through hole is larger than the outer diameter of the bellows (121) and smaller than the outer diameter of the baffle (122).

6. A sulfamic acid preparation device according to claim 3, characterized in that: The conveying and filtering assembly comprises a horizontally arranged conveyor belt (1), rollers respectively arranged at both ends of the conveyor belt (1), a driving motor connected to one of the rollers, and a support box (2) arranged inside the conveyor belt (1); the conveyor belt (1) has two belts with a filter belt fixedly arranged between the two belts; the rollers are rotatably connected to a roller frame; and the two ends of the support box (2) are respectively fixed to the two roller frames; An accommodating space is provided on the inner side of the support box (2), and a plurality of support bars (21) are provided in a linear array, and the inner side of the filter belt is in contact with the support bars (21).

7. A sulfamic acid preparation device according to claim 6, characterized in that: The heat exchange structure comprises a ventilation pipe (11) with one end connected to the outside of the suction pipe (12), a heat exchange pipe (3) with one end connected to an air pump and one end connected to the air pump, the heat exchange pipe (3) passing through the support box (2) horizontally in a broken line, the ventilation pipe (11) being provided with a second solenoid valve, and the other end of the heat exchange pipe (3) being a free end extending into the atmosphere.

8. A sulfamic acid preparation device according to claim 3, characterized in that: The precooling structure comprises a precooling pool (17), a precooling cylinder (171) arranged inside the precooling pool (17), a feed pipe (19) connected to the precooling cylinder (171) at one end, a discharge pipe (172) connected to the precooling pool (17) at one end, and a liquid inlet pipe (16) connected to the precooling cylinder (171) at one end, the other end of the feed pipe (19) being connected to the reaction device, and the other end of the liquid inlet pipe (16) being connected to the upper end of the refrigerator body (10).

9. A sulfamic acid preparation device according to claim 2, characterized in that: The discharging structure comprises a discharging barrel (5) coaxially connected to the bottom end of the conical portion, an adjusting cylinder (51) slidably connected to the bottom end of the discharging barrel (5) up and down, and a discharging pipe (6) with one end connected to the outside of the discharging barrel (5), a solenoid valve 3 being provided on the discharging pipe (6), and the other end of the discharging pipe (6) being located above the conveyor belt (1).

10. The device for preparing sulfamic acid according to claim 3, characterized in that: A waterproof high-definition camera is provided on the filter plate (101), and the waterproof high-definition camera is fixedly connected to one end of a video cable (14). The other end of the video cable (14) extends out of the top of the refrigerator body (10) and is connected to a display screen.

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