A kind of aminosulfonic acid production equipment and production process

Abstract

The present application relates to a technical field of aminosulfonic acid production, and in particular to an aminosulfonic acid production device, which includes a reactor, wherein a plurality of cooling plates are arranged inside the reactor, and the plurality of cooling plates are arranged vertically and parallelly at intervals, and a stirring paddle is arranged at the bottom of the reactor and below the cooling plate, and the interior of the cooling plate is a hollow structure and is connected with a liquid outlet pipe and a liquid inlet pipe, and a plurality of channels are provided on the cooling plate horizontally penetrating the cooling plate; and a pushing component is arranged in the channel. The present application also discloses a process for producing aminosulfonic acid. The present application has the effect of improving the cooling efficiency of the feed liquid in the reactor.

Description

Technical Field

[0001] The present application relates to the technical field of aminosulfonic acid production, and in particular to aminosulfonic acid production equipment and production process. Background Art

[0002] Aminosulfonic acid is widely used in industry as a descaling and corrosion inhibitor, organic synthesis sulfonating agent, electroplating additive, denitrification agent and bleaching agent. In the production process of aminosulfonic acid, urea and oleum are first put into a reactor and stirred and mixed. A large amount of heat is generated when urea dissolves. However, the temperature that is more favorable for the production of aminosulfonic acid is 30-40°C, so the solution in the reactor needs to be cooled.

[0003] The related technology discloses a production device for aminosulfonic acid, including a reactor, a jacket outside the reactor, a feed pipe connected to the reactor, a connected hopper arranged on the feed pipe, a circulating coolant pipe arranged in the jacket outside the reactor, the pipe wall of the circulating coolant pipe abuts against the outer wall of the reactor, the liquid in the circulating coolant pipe is petroleum ether, and the petroleum ether circulates from bottom to top in the circulating coolant pipe to cool the feed liquid in the reactor.

[0004] However, in the above structure, since there is also liquid in the middle of the reactor, the cooling effect through the circulating coolant pipeline located outside the reactor is poor. Summary of the invention

[0005] In order to improve the efficiency of cooling the liquid in the reactor, the present application provides an aminosulfonic acid production device and a production process.

[0006] The present application provides a sulfamic acid production device, which adopts the following technical solution:

[0007] A sulfamic acid production device comprises a reactor, wherein a plurality of cooling plates are arranged inside the reactor, the plurality of cooling plates are arranged vertically and in parallel at intervals, a stirring paddle is arranged at the bottom of the reactor and below the cooling plates, the interior of the cooling plate is a hollow structure and is connected with a liquid outlet pipe and a liquid inlet pipe, a plurality of channels are opened on the cooling plate and pass through the cooling plate horizontally; a pushing component is arranged in the channel.

[0008] By adopting the above technical scheme, when in use, after adding the feed liquid into the reactor, the stirring paddle is located at the bottom of the reactor, and the rotation of the stirring paddle can make the feed liquid move to the edge of the bottom of the reactor, and at the same time move upward along the two outermost cooling plates. When it reaches the position where the channel is opened on the cooling plate, it can move horizontally along the channel to the middle of the reactor, and move downward along the cooling plate, so that the cooling plate contacts the feed liquid in the reactor and exchanges heat, and the cooling plate cools the feed liquid in the reactor through the coolant flowing through the liquid outlet pipe and the liquid inlet pipe. At the same time, since multiple cooling plates are spaced in the feed liquid, the cooling efficiency of the feed liquid in the reactor can be improved.

[0009] Preferably, the pushing assembly includes a circular outer frame and fan blades arranged in the outer frame, and the outer frame is rotatably connected to the channel; the outer frame is driven to rotate by the driving assembly.

[0010] By adopting the above technical solution, the circular outer frame is rotatably connected in the channel. When the outer frame is rotated by the driving assembly, the fan blades can also rotate with the outer frame, and then the fan blades can push the liquid in the channel to move faster in the channel, so that the liquid is distributed between multiple cooling plates, thereby improving the cooling efficiency of the liquid.

[0011] Preferably, the driving assembly includes a transmission wheel and a belt, the transmission wheel is rotatably connected in the cooling plate, and the belt is driven and connected to the transmission wheel and a plurality of circular outer frames; the transmission wheel is connected to a driving motor.

[0012] By adopting the above technical solution, the transmission wheel is rotatably connected to the cooling plate, and the transmission wheel is driven by a driving motor. When the transmission wheel rotates, the transmission wheel can drive multiple outer frames to rotate through a belt, thereby facilitating the simultaneous operation of the pushing components in multiple channels, and the structure is relatively simple.

[0013] Preferably, the drive motor is fixed on the bottom wall of the reactor, the output shaft of the drive motor is coaxially fixed on the stirring paddle, a driving bevel gear is coaxially fixed on the output shaft of the drive motor, a transmission shaft is coaxially fixed on the transmission wheel, and a driven bevel gear meshing with the driving bevel gear is coaxially fixed on the transmission shaft.

[0014] By adopting the above technical solution, the driving motor is fixed at the bottom of the reactor, the driving motor is connected to the stirring paddle, and the transmission shaft is driven by the active bevel gear and the driven bevel gear, and the transmission shaft is connected to the transmission wheel, so that the driving motor can drive the pushing assembly and the stirring paddle at the same time.

[0015] Preferably, the middle cooling plate among the multiple cooling plates is located above the middle position of the stirring paddle, and the middle cooling plate separates the slurry on both sides; the transmission shafts are provided with two and are coaxially arranged, and the driven bevel gears on the two transmission shafts are meshed with the same driving bevel gear.

[0016] By adopting the above technical solution, the middle cooling plate can separate the liquid on both sides so that the plates on both sides can be controlled separately. At the same time, the two transmission shafts drive the liquid on both sides of the cooling plate to approach the middle cooling plate, thereby more evenly distributing the liquid in the reactor.

[0017] Preferably, a liquid guide plate is provided below the cooling plate and above the stirring paddle, and the liquid guide plate is fixed on the side wall of the reactor. Two liquid guide plates are provided and are blocked below the multiple liquid guide plates and close to the side wall of the reactor; the two liquid guide plates are spaced apart at a position above the middle of the stirring paddle.

[0018] By adopting the above technical solution, the liquid guide plate is located above the stirring paddle and below the cooling plate. When the stirring paddle moves the slurry to the position between the liquid guide plate and the bottom wall of the reactor, the liquid guide plate can block the slurry from moving upward from the position between two adjacent cooling plates, thereby enabling the slurry to circulate smoothly in the reactor.

[0019] Preferably, a control device is provided in the reactor, and the control device includes a partition plate and an adjustment component for adjusting the up and down movement of the partition plate; the partition plate is parallel to the cooling plate and is located between adjacent cooling plates, and the partition plate is provided with through holes corresponding to the channels, and temperature sensors are fixedly provided on multiple cooling plates.

[0020] By adopting the above technical solution, the control device includes a partition plate, which can move vertically under the action of the adjustment component. When the through hole on the partition plate is aligned with the channel, more slurry can be moved closer to the middle cooling plate. When the through hole on the partition plate is staggered with the channel, the flow rate of the slurry can be adjusted, thereby adjusting the distribution of the slurry between multiple cooling plates.

[0021] Preferably, the adjusting assembly comprises an adjusting motor, a cam and a frame, the adjusting motor is fixed on the top of the reactor, the cam is coaxially fixed on the output shaft of the adjusting motor, the frame is fixed to the partition plate, and the cam is arranged in the frame.

[0022] By adopting the above technical solution, a cam is coaxially fixed on the output shaft of the adjusting motor, and the cam is located in the frame. The cam is driven by the adjusting motor to rotate in the frame, so that the cam can rotate in the frame, and then the frame can be moved up and down and drive the partition plate to adjust its upper and lower position, which is more convenient to operate.

[0023] Preferably, a spiral circulating coolant pipe is wound on the outer wall of the reactor, one end of the circulating coolant pipe is connected to the liquid outlet pipe, and the other end is connected to the liquid inlet pipe, and the setting position of the liquid outlet pipe is higher than the setting position of the liquid inlet pipe.

[0024] By adopting the above technical solution, one end of the circulating coolant pipeline is connected to the liquid outlet pipe, and the other end is connected to the liquid inlet pipe, so that the circulating coolant pipeline can cooperate with the cooling plate to cool the liquid in the reactor, and the liquid outlet pipe and the liquid inlet pipe are used to cool the inside and outside of the reactor at the same time.

[0025] The present application also provides a sulfamic acid production process, which adopts the following technical solution:

[0026] A sulfamic acid production process comprises adding a feed liquid into a reaction kettle and cooling the middle position of the feed liquid inside the reaction kettle through a plurality of cooling plates.

[0027] By adopting the above technical solution, after the feed liquid is added into the reactor, the inside of the feed liquid is cooled by multiple cooling plates at the same time, thereby improving the cooling efficiency of the feed liquid and reducing the excessive temperature inside the feed liquid.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The rotation of the stirring paddle can make the feed liquid move to the edge of the bottom of the reactor, and move upward along the two outermost cooling plates. When it reaches the position where the channel is opened on the cooling plate, it can move horizontally along the channel to the middle of the reactor, and move downward along the cooling plate, so that the cooling plate contacts the feed liquid in the reactor and performs heat exchange. Multiple cooling plates are spaced in the feed liquid, thereby improving the cooling efficiency of the feed liquid in the reactor;

[0030] 2. It is connected to the cooling plate through the transmission wheel, which is driven by the driving motor. When the transmission wheel rotates, the transmission wheel can drive multiple outer frames to rotate through the belt, thereby facilitating the simultaneous operation of the driving components in multiple channels;

[0031] 3. When the through holes on the partition plate are aligned with the channels, more liquid can be brought closer to the middle cooling plate. When the through holes on the partition plate are staggered with the channels, the flow rate of the liquid can be adjusted, thereby adjusting the distribution of the liquid between multiple cooling plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0033] Figure 2 It is a schematic diagram of the internal structure of the reactor in the embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the arrangement position of the cooling plate in the embodiment of the present application;

[0035] Figure 4 is a schematic diagram of the structure of the driving component in an embodiment of the present application;

[0036] Figure 5 yes Figure 2 A partial enlarged schematic diagram of part A;

[0037] Figure 6 is a schematic diagram of the position of the partition plate in the embodiment of the present application;

[0038] Figure 7 yes Figure 1 A partial enlarged schematic diagram of part B.

[0039] Explanation of the accompanying drawings: 1. Reactor; 11. Jacket; 12. Circulating coolant pipeline; 2. Stirring paddle; 21. Driving motor; 22. Liquid guide plate; 3. Cooling plate; 31. Channel; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 5. Pushing assembly; 51. Outer frame; 52. Fan blade; 6. Driving assembly; 61. Transmission wheel; 62. Belt; 63. Active bevel gear; 64. Driven bevel gear; 65. Transmission shaft; 7. Temperature sensor; 8. Control device; 81. Partition plate; 811. Through hole; 82. Adjusting assembly; 821. Adjusting motor; 822. Cam; 823. Frame; 83. Guide groove. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-7 This application is described in further detail.

[0041] The present application embodiment discloses a sulfamic acid production device, referring to Figure 1 , comprising a reactor 1, a jacket 11 is arranged on the outer wall of the reactor 1, a spiral circulating coolant pipe 12 is arranged in the jacket 11, the circulating coolant pipe 12 is wound around the cylindrical outer wall of the reactor 1 and at the lower part of the reactor 1, the circulating coolant pipe 12 abuts against the outer wall of the reactor 1, and then the reactor 1 can be cooled by flowing a coolant for cooling the feed liquid in the reactor 1 through the circulating coolant pipe 12.

[0042] refer to Figure 2 A stirring paddle 2 is provided inside the reactor 1 and at the bottom of the reactor 1. The stirring paddle 2 is connected to a driving motor 21, and the driving motor 21 drives the stirring paddle 2 to rotate horizontally. The driving motor 21 is fixed to the outer wall at the bottom of the reactor 1, so that the output shaft of the driving motor 21 coincides with the center line of the reactor 1, and the output shaft of the driving motor 21 penetrates into the reactor 1. One end of the stirring paddle 2 is fixed to the output shaft of the driving motor 21, and the other end extends to the edge of the reactor 1. When the feed liquid moves toward the position of the stirring paddle 2, the feed liquid is subjected to centrifugal force under the rotation of the stirring paddle 2 and moves toward the edge of the reactor 1.

[0043] refer to Figure 2 and Figure 3A plurality of cooling plates 3 are arranged in the middle of the reactor 1. The cooling plates 3 are hollow structures. The cooling plates 3 are arranged vertically, and the plurality of cooling plates 3 are parallel to each other and arranged at intervals. The center of the middle cooling plate 3 is located directly above the center of the stirring paddle 2. The cooling plates 3 deviating from the middle of the stirring paddle 2 are provided with horizontal channels 31. The horizontal channels 31 are used for the feed liquid to move horizontally, so that the feed liquid can enter the middle of the plurality of cooling plates 3, and exchange heat with the cooling plates 3 through contact between the feed liquid and the cooling plates 3, thereby cooling the feed liquid in the reactor 1.

[0044] refer to Figure 3 The cooling plate 3 is connected with a liquid inlet pipe 41 and a liquid outlet pipe 42, and the liquid outlet pipe 42 and the liquid inlet pipe 41 are both arranged perpendicular to the cooling plate 3, and the liquid inlet pipe 41 and the liquid outlet pipe 42 sequentially penetrate the plurality of cooling plates 3, and the liquid inlet pipe 41 and the liquid outlet pipe 42 are both connected with the cavity inside each cooling plate 3. The liquid inlet pipe 41 is fixed at the lower part of the cooling plate 3, and the liquid outlet pipe 42 is connected at the upper part of the cooling plate 3. At the same time, the lower end of the circulating coolant pipe 12 is connected with the liquid inlet pipe 41, and the upper end of the circulating coolant pipe 12 is connected with the liquid outlet pipe 42, so that the coolant enters the cooling plate 3 through the liquid inlet pipe 41, and flows out of the cooling plate 3 from the upper part of the cooling plate 3 and enters the liquid outlet pipe 42. At the same time, the cooling plate 3 cools the feed liquid at the middle position of the feed liquid, and the circulating coolant pipe 12 is outside the reactor 1, and cools the outer side of the feed liquid, thereby improving the cooling efficiency of the feed liquid. In this embodiment, two liquid inlet pipes 41 and two liquid outlet pipes 42 are provided, and two circulating coolant pipelines 12 are also provided. One circulating coolant pipeline 12 is connected to one liquid inlet pipe 41 and one liquid outlet pipe 42 correspondingly.

[0045] refer to Figure 3A liquid guide plate 22 is provided between the stirring paddle 2 and the cooling plate 3. The liquid guide plate 22 is arranged horizontally. There are two liquid guide plates 22. The two liquid guide plates 22 are arc-shaped. One side of the arc-shaped liquid guide plate 22 is close to the inner wall of the reactor 1 and is fixedly connected to the inner wall of the reactor 1. The two liquid guide plates 22 are symmetrically arranged so that the position between the two liquid guide plates 22 is directly above the center of the stirring paddle 2. The two ends of the liquid guide plate 22 are respectively connected to the two outermost cooling plates 3 so that the liquid guide plate 22 can separate the positions between the multiple cooling plates 3 and close to the edge of the reactor 1 up and down, so that the stirring paddle 2 rotates to the position of the liquid guide plate 22. When the feed liquid is placed, it moves between the liquid guide plate 22 and the bottom wall of the reactor 1 and its speed reaches the speed of the stirring paddle 2. Then, after moving to the end position of the liquid guide plate 22, it moves in the longitudinal direction of the reactor 1. At the same time, the feed liquid that reaches the upper part of the reactor 1 can move along the channel 31 of the cooling plate 3 to the position in the middle of the multiple cooling plates 3. At the same time, due to the lack of feed liquid at the center of the stirring paddle 2, the feed liquid will flow from top to bottom along the position between the two cooling plates 3. Then, the feed liquid is cooled in the process of moving along the cooling plates 3, and a larger circulation is formed, so that the feed liquid can contact the cooling plates 3 more fully. No channel 31 is provided in the middle cooling plate 3, so that the feed liquid on both sides of the middle cooling plate 3 is separated, and the temperature of the feed liquid on each side is conveniently controlled.

[0046] refer to Figure 4 There are multiple channels 31 on the cooling plate 3, and the channels 31 are distributed in multiple rows up and down, and each row is provided with multiple channels. In this embodiment, there are four channels 31 on each cooling plate 3, and the number of cooling plates 3 is set to five in this embodiment. A pushing component 5 is arranged in each channel 31, and the pushing component 5 includes a circular outer frame 51 and a fan blade 52. The outer frame 51 is rotatably connected to the inner wall of the channel 31, and a driving component 6 is arranged in the cooling plate 3. The driving component 6 rotates multiple pushing components 5 at the same time, and the fan blade 52 is fixed at the center position of the outer frame 51. The driving component 6 includes a transmission wheel 61 and a belt 62. The transmission wheel 61 is rotatably installed in the middle position of the lower part of the cooling plate 3, and then the belt 62 passes through the transmission wheel 61 and is connected to the outer side of multiple circular outer frames 51, so that the belt 62 can drive multiple pushing components 5 to work at the same time, and the pushing components 5 located on both sides of the middle cooling plate 3 are used to transport the liquid toward the direction close to the middle cooling plate 3.

[0047] refer to Figure 5, a driving bevel gear 63 is coaxially fixed on the output shaft of the driving motor 21, and the driving bevel gear 63 is located inside the cavity of the middle cooling plate 3. A transmission shaft 65 is coaxially fixed on the transmission wheel 61. There are two transmission shafts 65, and the two transmission shafts 65 respectively penetrate the cooling plates 3 on both sides of the middle cooling plate 3. The transmission wheel 61 is coaxially fixed on the transmission wheel 61, and a driven bevel gear 64 is coaxially fixed at one end of the transmission shaft 65 close to the middle cooling plate 3. The driving bevel gear 63 meshes with the driven bevel gear 64, so that the rotation directions of the two transmission shafts 65 are opposite, and the rotation directions of the pushing assembly 5 are opposite, so that the slurry can be moved closer to the middle cooling plate 3. At the same time, the stirring paddle 2 can be driven to rotate by a driving motor 21, and multiple pushing assemblies 5 can be driven at the same time, reducing the number of power sources required.

[0048] refer to Figure 2 A temperature sensor 7 is fixedly arranged on each cooling plate 3, and the temperature sensor 7 can measure the temperature of the liquid in each area separated by the cooling plate 3, so as to monitor multiple positions of the liquid inside the reactor 1, and timely find the situation where the internal local temperature is high. A control device 8 is arranged in the reactor 1, and the control device 8 is used to control the flow rate of the liquid in the multiple areas separated by the cooling plate 3, so as to adjust the temperature of the liquid in the separated areas.

[0049] refer to Figure 2 and Figure 6 The control device 8 includes a partition plate 81 and an adjustment component 82. The partition plate 81 is located between two cooling plates 3 far away from the middle cooling plate 3, that is, between the first and second cooling plates 3 arranged along the direction of the liquid outlet pipe 42 or the liquid inlet pipe 41 in this embodiment, and the partition plate 81 is arranged parallel to the cooling plate 3. A plurality of through holes 811 are provided on the partition plate 81. The plurality of through holes 811 are arranged in a one-to-one correspondence with the plurality of channels 31, and the diameter of the through holes 811 is equal to the diameter of the channels 31. Guide grooves 83 are provided on the vertical sides of the partition plate 81. The guide grooves 83 are fixed on the liquid outlet pipe 42 or the liquid inlet pipe 41. The partition plate 81 is vertically slidably connected in the guide grooves 83. The adjustment component 82 is used to adjust the height of the partition plate 81, so that the positions of the through holes 811 and the channels 31 can be mutually misaligned. When the through hole 811 and the channel 31 are on the same center line, it is easier to enter between the second cooling plate 3 and the middle cooling plate 3 from between the first and second cooling plates 3; when the center line of the through hole 811 is away from the center line of the channel 31, the feed liquid passing through the second cooling plate 3 is gradually reduced, and the height of the partition plate 81 is adjusted according to the temperature measured by the temperature sensor 7, so that the temperature of the feed liquid in multiple areas in the reactor 1 can be controlled.

[0050] refer to Figure 7The adjusting assembly 82 includes an adjusting motor 821, a cam 822 and a frame 823. The frame 823 is provided with a rectangular shape. The adjusting motor 821 is fixed on the top wall of the reactor 1. The cam 822 is coaxially fixed on the output shaft of the adjusting motor 821. The cam 822 is located inside the frame 823. The axis of the cam 822 is arranged horizontally. Then, when the farthest point of the cam 822 abuts against the upper side wall and the lower side wall of the frame 823 respectively, the height of the frame 823 can be adjusted. At the same time, the frame 823 is fixed on the partition plate 81, so that the frame 823 drives the partition plate 81 to adjust in the vertical direction.

[0051] This embodiment also discloses a sulfamic acid production process, which uses the above-mentioned sulfamic acid production equipment, including cooling the feed liquid in multiple areas separated by multiple cooling plates 3 at the same time, so that the feed liquid in the production reactor 1 of sulfamic acid is at 30-40°C.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sulfamic acid production device, comprising a reaction kettle (1), characterized in that: A plurality of cooling plates (3) are arranged inside the reactor (1), and the plurality of cooling plates (3) are arranged vertically and in parallel at intervals. A stirring paddle (2) is arranged at the bottom of the reactor (1) and below the cooling plate (3). The interior of the cooling plate (3) is a hollow structure and is connected to a liquid outlet pipe (42) and a liquid inlet pipe (41). The cooling plate (3) is provided with a plurality of channels (31) that horizontally penetrate the cooling plate (3). A pushing assembly (5) is arranged inside the channel (31), and the pushing assembly (5) comprises a circular outer frame (51) and a fan blade (52) arranged inside the outer frame (51). The outer frame (51) is rotatably connected to the channel (31), and the outer frame (51) is driven to rotate by a driving assembly (6). The driving assembly (6) is provided to drive the outer frame (51) to rotate. The component (6) comprises a transmission wheel (61) and a belt (62), wherein the transmission wheel (61) is rotatably connected to the cooling plate (3), and the belt (62) is transmission-connected to the transmission wheel (61) and a plurality of circular outer frames (51); the transmission wheel (61) is connected to a driving motor (21), and the driving motor (21) is fixed to the bottom wall of the reaction kettle (1); the output shaft of the driving motor (21) is coaxially fixed to the stirring paddle (2); a driving bevel gear (63) is coaxially fixed to the output shaft of the driving motor (21); a transmission shaft (65) is coaxially fixed to the transmission wheel (61), and a driven bevel gear (64) meshing with the driving bevel gear (63) is coaxially fixed to the transmission shaft (65).

2. A sulfamic acid production equipment according to claim 1, characterized in that: The middle cooling plate (3) among the plurality of cooling plates (3) is located above the middle position of the stirring paddle (2), and the middle cooling plate (3) separates the slurry on both sides; two transmission shafts (65) are provided and are coaxially arranged, and the driven bevel gears (64) on the two transmission shafts (65) are meshed with the same driving bevel gear (63).

3. A sulfamic acid production equipment according to claim 1, characterized in that: A liquid guide plate (22) is provided below the cooling plate (3) and above the stirring paddle (2); the liquid guide plate (22) is fixed on the side wall of the reaction kettle (1); two liquid guide plates (22) are provided and are located below the plurality of cooling plates (3) and close to the side wall of the reaction kettle (1); the two liquid guide plates (22) are spaced apart at a position above the middle of the stirring paddle (2).

4. A sulfamic acid production equipment according to claim 1, characterized in that: A control device (8) is provided in the reactor (1), the control device (8) comprising a partition plate (81) and an adjustment component (82) for adjusting the upward and downward movement of the partition plate (81); the partition plate (81) is parallel to the cooling plate (3) and is located between adjacent cooling plates (3); a through hole (811) corresponding to the channel (31) is provided on the partition plate (81); and temperature sensors (7) are fixedly provided on a plurality of the cooling plates (3).

5. A sulfamic acid production equipment according to claim 4, characterized in that: The regulating assembly (82) comprises an regulating motor (821), a cam (822) and a frame (823); the regulating motor (821) is fixed on the top of the reaction kettle (1); the cam (822) is coaxially fixed on the output shaft of the regulating motor (821); the frame (823) is fixed to the partition plate (81); and the cam (822) is arranged in the frame (823).

6. A sulfamic acid production equipment according to claim 1, characterized in that: A spiral circulating coolant pipe (12) is wound around the outer wall of the reactor (1); one end of the circulating coolant pipe (12) is connected to a liquid outlet pipe (42), and the other end is connected to a liquid inlet pipe (41); the liquid outlet pipe (42) is arranged at a position higher than the liquid inlet pipe (41).

7. A process for producing sulfamic acid, comprising producing sulfamic acid using the sulfamic acid production equipment according to any one of claims 1 to 6, characterized in that: The method comprises adding a feed liquid into a reaction kettle (1), and cooling the middle position of the feed liquid inside the reaction kettle (1) through a plurality of cooling plates (3).

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