A continuous crystallization device for the production of sulfamic acid and its usage method

Abstract

The present invention discloses a continuous crystallization device for sulfamic acid production and its usage method, belonging to the technical field of sulfamic acid preparation. A top cover is movably installed between the outer ring platform and the inner ring platform, and the threaded ring triggers multiple locking rods and lifting blocks to double-lock the top cover; the end of the diversion pipe is provided with multiple spray heads located inside the condensation cylinder; multiple condensation pipelines are opened on the inner wall of the condensation cylinder, an air inlet annular groove communicating with the condensation pipelines is opened on the inner wall of the first closed cover, a second closed cover is further installed on the right side of the condensation cylinder, an air outlet annular groove communicating with the condensation pipelines is opened on the inner wall of the second closed cover, and an air outlet nozzle is arranged on the outer wall of the second closed cover. The present invention can quickly crystallize the sulfamic acid solution through the condensation cylinder. After the waste liquid is discharged from the condensation cylinder, the discharge motor is started and the sector plate is driven to rotate to open the discharge cavity. With the cooperation of the inner cylinder and the scraping strip, the sulfamic acid crystals are scraped off. This design improves the practicability of the continuous crystallization device.

Description

Technical Field

[0001] The present invention relates to the technical field of sulfamic acid preparation, and specifically to a continuous crystallization device for sulfamic acid production and its usage method. Background Art

[0002] Sulfamic acid is an inorganic solid acid formed by substituting the hydroxyl group of sulfuric acid with an amino group. It is soluble in water and liquid ammonia. At room temperature, as long as it is kept dry and not in contact with water, solid sulfamic acid does not absorb moisture and is relatively stable. The aqueous solution of sulfamic acid has the same strong acidity as hydrochloric acid, sulfuric acid, etc., so it is also called solid sulfuric acid. It has the characteristics of non-volatility, no odor, and low toxicity to the human body. Dust or solution is irritating to the eyes and skin, can cause burns, and the maximum allowable concentration is 10mg / m 3 . Sulfamic acid can be used to synthesize herbicides, fire retardants, sweeteners, preservatives, metal cleaning agents, etc., and is a common chemical raw material.

[0003] The patent application with the publication number CN119588270A discloses a device and process for realizing continuous crystallization production of sulfamic acid, including a filtration box and a production box. The production box is fixedly connected to the upper surface of the filtration box by bolts. The top of the production box is provided with a feed pipe. The middle part of the production box is provided with a partition plate, and the middle part of the partition plate is provided with a conveying pipe. A discharge pipe is arranged between the production box and the filtration box, a production reaction module, and a filtration and cleaning module. This technical solution can, during the continuous crystallization production of sulfamic acid, when the filtration cylinder filters out sulfamic acid crystals from the mother liquor, spray pure water into the interior of the filtration cylinder through a nozzle, and make the sulfamic acid crystals be quickly and evenly washed to remove impurities through the continuously reciprocating shaking of the filtration cylinder during rotation, which can effectively increase the efficiency of continuous crystallization production of sulfamic acid.

[0004] However, the sealing effect of the above-disclosed sulfamic acid crystallization device is average, lacking a high-sealing quick-locking structure, and the cooling effect is also average. It cannot fully crystallize the reacted solution, the crystallization efficiency is low, and it is easy to cause waste. Summary of the Invention

[0005] The purpose of the present invention is to provide a continuous crystallization device for sulfamic acid production and its usage method to solve the problems that the existing sulfamic acid crystallization device has an average sealing effect, lacks a high-sealing quick-locking structure, has an average cooling effect, cannot fully crystallize the reacted solution, has a low crystallization efficiency, and is easy to cause waste, etc.

[0006] To achieve the above object, the technical solution of the present invention is: a continuous crystallization device for the production of sulfamic acid, including a sulfonation kettle and a crystallization mechanism. The top of the sulfonation kettle is provided with a kettle opening, and coaxially arranged outer and inner ring platforms are fixedly provided at the top of the kettle opening. A top cover is movably installed between the outer and inner ring platforms. A plurality of locking rods are movably arranged inside the outer ring platform, and a plurality of lifting blocks and compression columns are also arranged vertically inside the outer ring platform. A threaded ring is threadedly installed on the outer ring platform, and the threaded ring triggers the plurality of locking rods and lifting blocks to double-lock the top cover. A diversion pipe is arranged at the bottom of the sulfonation kettle, and a blanking valve is installed on the diversion pipe. The crystallization mechanism includes a condensation cylinder, and a plurality of spray heads located inside the condensation cylinder are arranged at the end of the diversion pipe. A plurality of condensation pipelines are opened on the inner wall of the condensation cylinder. A first airtight cover movably connected to the condensation cylinder is fixedly provided on the diversion pipe. An air intake ring groove communicated with the condensation pipeline is opened on the inner wall of the first airtight cover, and an air intake nozzle is arranged on the outer wall of the first airtight cover. A second airtight cover is also installed on the right side of the condensation cylinder. An air outlet ring groove communicated with the condensation pipeline is opened on the inner wall of the second airtight cover, and an air outlet nozzle is arranged on the outer wall of the second airtight cover.

[0007] As a further scheme of the present invention: the crystallization mechanism further includes a support frame fixedly installed on the ground. A rotating hoop is fixedly provided at the top of the support frame, and the condensation cylinder is movably installed inside the rotating hoop. A flipping gear ring is also installed on the outer wall of the condensation cylinder, and a flipping motor is installed on the outer wall of the support frame. A flipping gear meshing with the flipping gear ring is installed at the output end of the flipping motor.

[0008] As a further scheme of the present invention: a rotating cavity is opened on the inner wall of the condensation cylinder, and a plurality of scraping bars located inside the rotating cavity are also arranged on the inner wall of the condensation cylinder. A rotating groove penetrating the outer wall of the condensation cylinder is opened at the top of the rotating cavity. An inner cylinder is movably installed inside the rotating cavity, and a blanking gear ring movably arranged in the rotating groove is fixedly provided at the top of the inner cylinder. Through holes communicating the two sides of the condensation pipeline are opened on the blanking gear ring. A blanking motor is installed on the outer wall of the condensation cylinder, and a blanking gear meshing with the blanking gear ring is installed at the output end of the blanking motor.

[0009] As a further scheme of the present invention: a cantilever is also arranged on the outer wall of the support frame, and the second airtight cover is fixedly provided on the cantilever. A plurality of spaced drain grooves and discharge cavities are opened on the second airtight cover.

[0010] As a further solution of the present invention: a sector plate is rotatably arranged on the outer wall of the second sealing cover, a discharge gear ring is installed on the outer wall of the sector plate, a discharge motor is installed on the top of the second sealing cover, and a discharge gear meshing with the discharge gear ring is installed at the output end of the discharge motor.

[0011] As a further solution of the present invention: a plurality of sets of extrusion chambers I are formed inside the outer ring platform, and the locking rod is movably installed in the extrusion chamber I; symmetrical reset chambers I are formed on both sides of the extrusion chamber I, a convex plate I which is movably arranged in the reset chamber I is fixedly arranged on the outer wall of the locking rod, and a first reset spring is connected to the bottom of the convex plate I; a locking block is fixedly arranged on the inner side of the locking rod, and a plurality of locking grooves cooperating with the locking block are formed on the outer wall of the top cover.

[0012] As a further solution of the present invention: a plurality of positioning members are arranged at the bottom of the top cover, and each positioning member includes a horizontal portion and a vertical portion; a quick-locking chamber is formed between the outer ring platform and the inner ring platform, a positioning groove for quickly positioning the positioning member is formed at the bottom of the quick-locking chamber, and a locking groove for locking the horizontal portion is formed on the inner wall of the positioning groove in the clockwise direction.

[0013] As a further solution of the present invention: a lifting chamber is formed at the bottom of the positioning groove, a lifting block is movably installed in the lifting chamber, and a second reset spring is further connected to the bottom of the lifting block; a plurality of sets of extrusion chambers II communicating with the lifting chamber are formed on the outer ring platform, a linkage member is movably installed at the bottom of the extrusion chamber II, an extrusion portion cooperating with the lifting block is arranged on the inner side of the linkage member, and a lifting inclined surface is arranged on the outer wall of the lifting block; a plurality of third reset springs are connected to the outer wall of the linkage member, a compression column is movably arranged on the top of the linkage member, a lower inclined block is arranged at the bottom of the compression column, and an upper inclined block abutting against the lower inclined block is arranged on the top of the linkage member.

[0014] As a further solution of the present invention: symmetrical reset chambers II are formed on both sides of the extrusion chamber II, convex plates II which are movably arranged in the reset chambers II are fixedly arranged on both sides of the compression column, and a fourth reset spring is connected to the bottom of the convex plate II; a stirring motor is installed on the top of the top cover, a stirring shaft is arranged at the output end of the stirring motor, and a control panel is arranged on the outer wall of the sulfonation kettle.

[0015] As a further solution of the present invention: A method for using a continuous crystallization device for the production of sulfamic acid. S1. The top cover is quickly installed through the locking rod and the lifting block, and then urea and fuming sulfuric acid are added to the sulfonation kettle in proportion. S2. After the sulfonation reaction is completed, a small amount of dilute sulfuric acid is added to the sulfonation kettle and the pH value is adjusted. S3. The feed valve is opened, and the sulfamic acid solution is transported to the condensation cylinder through the diversion pipe. S4. Condensing gas is input into the air inlet nozzle, and the condensation cylinder is driven to rotate by a driving device. S5. The excess liquid is discharged through the second closed cover, and the sulfamic acid crystals are collected.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the top cover can be quickly installed in the quick-lock cavity through the positioning member. When the threaded ring is installed, the threaded sleeve will squeeze the locking rod and the compression column. At this time, the locking rod moves inward and locks the outer wall of the top cover. Under the cooperation of the upper inclined block and the lower inclined block, the linkage member will slide inward. At this time, the lifting block slides upward along the lifting cavity and locks again between the vertical part and the inner wall of the positioning groove, thus greatly improving the tightness and avoiding the escape of harmful gases generated by the sulfonation reaction. This design improves the stability and safety of the continuous crystallization device for the production of sulfamic acid.

[0018] 2. In the present invention, the condensation cylinder can quickly cool the sulfamic acid solution. Under the cooperation of the nozzle and the condensation cylinder, the sulfamic acid can be quickly crystallized. After the crystallization is completed, the discharge motor is driven to rotate the sector plate and open the drain tank. At this time, the waste liquid is discharged from the drain tank out of the condensation cylinder. Then the discharge motor is started again and the sector plate is driven to rotate and open the discharge cavity. Under the cooperation of the inner cylinder and the scraping strip, the sulfamic acid crystals are scraped off. This design improves the practicability of the continuous crystallization device for the production of sulfamic acid. Description of the Drawings

[0019] The present invention will be further explained below with reference to the drawings and embodiments:

[0020] Figure 1 is the three-dimensional structure diagram of the present invention;

[0021] Figure 2 is the three-dimensional structure diagram of the sulfonation kettle in the present invention;

[0022] Figure 3 is the partial three-dimensional structure diagram of the kettle mouth in the present invention;

[0023] Figure 4 is the three-dimensional structure diagram of the top cover in the present invention;

[0024] Figure 5 is the partial cross-sectional view of the kettle mouth in the present invention;

[0025] Figure 6 is a partial cross-sectional view of the present invention;

[0026] Figure 7 is an internal three-dimensional structure diagram of the sulfonation kettle in the present invention;

[0027] Figure 8 is a three-dimensional structure diagram of the crystallization mechanism in the present invention;

[0028] Figure 9 is a cross-sectional view of the crystallization mechanism in the present invention;

[0029] Figure 10 is a three-dimensional structure diagram of the condensation cylinder in the present invention;

[0030] Figure 11 is a three-dimensional structure diagram of the inner cylinder in the present invention;

[0031] Figure 12 is a three-dimensional structure diagram of the support frame in the present invention;

[0032] Figure 13 is a three-dimensional structure diagram of the sector plate in the present invention.

[0033] Description of reference numerals:

[0034] 1. Sulfonation kettle; 101. Kettle opening; 102. Outer ring platform; 103. Inner ring platform; 104. Quick-lock cavity; 105. Top cover; 106. Stirring motor; 107. Stirring shaft; 108. Extrusion cavity one; 109. Locking rod; 110. Reset cavity one; 111. Convex plate one; 112. Reset spring one; 113. Locking block; 114. Locking groove; 115. Positioning member; 116. Horizontal part; 117. Vertical part; 118. Positioning groove; 119. Locking groove; 120. Lifting cavity; 121. Lifting block; 122. Reset spring two; 123. Extrusion cavity two; 124. Linkage member; 125. Extrusion part; 126. Lifting inclined surface; 127. Reset spring three; 128. Compression column; 129. Upper inclined block; 130. Lower inclined block; 131. Reset cavity two; 132. Convex plate two; 133. Reset spring four; 134. Control panel; 135. Threaded ring; 136. Diversion pipe; 137. Discharge valve; 138. Sprinkler head;

[0035] 2. Crystallization mechanism; 201. Support frame; 202. Condensation cylinder; 203. Rotating hoop; 204. Tipping gear ring; 205. Tipping motor; 206. Tipping gear; 207. First sealing cover; 208. Cantilever; 209. Second sealing cover; 210. Condensation pipeline; 211. Air inlet ring groove; 212. Air inlet nozzle; 213. Air outlet ring groove; 214. Air outlet nozzle; 215. Rotating cavity; 216. Scraping strip; 217. Rotating groove; 218. Inner cylinder; 219. Feeding gear ring; 220. Through hole; 221. Feeding motor; 222. Feeding gear; 223. Drainage groove; 224. Discharge cavity; 225. Sector plate; 226. Discharge gear ring; 227. Discharge motor; 228. Discharge gear. Detailed implementation manners

[0036] The following will combine with the attached Figures 1 to 13 The technical solutions of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The present invention provides a continuous crystallization device for the production of sulfamic acid through improvement. As Figures 1 - 13 shown, it includes a sulfonation kettle 1 and a crystallization mechanism 2. A kettle opening 101 is provided at the top of the sulfonation kettle 1. An outer ring platform 102 and an inner ring platform 103 with the same axis are fixedly provided at the top of the kettle opening 101. A top cover 105 is movably installed between the outer ring platform 102 and the inner ring platform 103. A plurality of groups of locking rods 109 are movably arranged inside the outer ring platform 102. A plurality of groups of lifting blocks 121 and compression columns 128 are also vertically arranged inside the outer ring platform 102; A threaded ring 135 is threadedly installed on the outer ring platform 102, and the threaded ring 135 triggers a plurality of groups of locking rods 109 and lifting blocks 121 to double-lock the top cover 105; A diversion pipe 136 is provided at the bottom of the sulfonation kettle 1, and a blanking valve 137 is installed on the diversion pipe 136; The crystallization mechanism 2 includes a condensation cylinder 202. A plurality of spray heads 138 located inside the condensation cylinder 202 are provided at the end of the diversion pipe 136; A plurality of groups of condensation pipelines 210 are opened on the inner wall of the condensation cylinder 202. A first sealing cover 207 movably connected to the condensation cylinder 202 is fixedly provided on the diversion pipe 136. An air inlet ring groove 211 communicating with the condensation pipeline 210 is opened on the inner wall of the first sealing cover 207, and an air inlet nozzle 212 is provided on the outer wall of the first sealing cover 207; A second sealing cover 209 is also installed on the right side of the condensation cylinder 202. An air outlet ring groove 213 communicating with the condensation pipeline 210 is opened on the inner wall of the second sealing cover 209, and an air outlet nozzle 214 is provided on the outer wall of the second sealing cover 209.

[0038] In this embodiment, the continuous crystallization device for sulfamic acid production is mainly divided into two parts: a sulfonation kettle 1 and a crystallization mechanism 2. When the device is in use, first, the top cover 105 is quickly installed through the locking rod 109 and the lifting block 121. Then, urea and fuming sulfuric acid are added to the sulfonation kettle 1 in proportion through the feeding port, and the stirring motor 106 is started to fully stir the raw materials. After the sulfonation reaction is completed, a small amount of dilute sulfuric acid is added to the sulfonation kettle 1 to adjust the pH value, and then the discharge valve 137 is opened. The sulfamic acid solution is transported to the inclined condensation cylinder 202 through the diversion pipe 136. Then, an external condensation gas device is connected to the air inlet nozzle 212. At this time, the condensation gas sequentially passes through the air inlet annular groove 211, the condensation pipeline 210, and the air outlet annular groove 213 and quickly cools the inner wall of the condensation cylinder 202. The turning motor 205 is started to drive the condensation cylinder 202 to rotate, and the solution sprayed through the nozzle 138 is quickly condensed and crystalized. After crystallization is completed, the discharge motor 227 is started to drive the sector plate 225 to rotate and open the drain tank 223. At this time, the waste liquid is discharged from the condensation cylinder 202 through the drain tank 223. Finally, the discharge motor 227 and the feeding motor 221 are started. While the discharge motor 227 drives the sector plate 225 to close the drain tank 223, the discharge cavity 224 is opened, and the feeding motor 221 drives the inner cylinder 218 to rotate and scrape the sulfamic acid crystals for discharging.

[0039] Refer to the appendix Figure 8 - appendix Figure 9 The crystallization mechanism 2 further includes a support frame 201 fixedly installed on the ground. The top of the support frame 201 is fixedly provided with a rotating hoop 203, and the condensation cylinder 202 is movably installed inside the rotating hoop 203. A turning gear ring 204 is further installed on the outer wall of the condensation cylinder 202, and a turning motor 205 is installed on the outer wall of the support frame 201. The output end of the turning motor 205 is installed with a turning gear 206 meshing with the turning gear ring 204.

[0040] In this embodiment, in order to ensure the free rotation of the condensation cylinder 202 relative to the support frame 201, thereby increasing the contact area between the sulfamic acid solution and the condensation cylinder 202, the rotating hoop 203 structure is designed. In order to automatically drive the rotation of the condensation cylinder 202, the turning motor 205 structure is designed. During the crystallization operation, first, the sulfamic acid solution is introduced into the condensation cylinder 202 through the inclined diversion pipe 136, and then an external condensation gas device is connected to the air inlet nozzle 212. At this time, the condensation gas sequentially passes through the air inlet annular groove 211, the condensation pipeline 210, and the air outlet annular groove 213 and quickly cools the inner wall of the condensation cylinder 202.

[0041] Refer to the appendix Figure 10 - appendix Figure 11, a rotating cavity 215 is formed on the inner wall of the condensation cylinder 202, and a plurality of scraping bars 216 located inside the rotating cavity 215 are further arranged on the inner wall of the condensation cylinder 202. A rotating groove 217 penetrating the outer wall of the condensation cylinder 202 is formed at the top of the rotating cavity 215; an inner cylinder 218 is movably installed in the rotating cavity 215, and a blanking gear ring 219 movably arranged in the rotating groove 217 is fixedly arranged at the top of the inner cylinder 218; through holes 220 communicating with the condensation pipelines 210 on both sides are formed in the blanking gear ring 219; a blanking motor 221 is installed on the outer wall of the condensation cylinder 202, and a blanking gear 222 meshing with the blanking gear ring 219 is installed at the output end of the blanking motor 221.

[0042] In this embodiment: during the crystallization operation, the sulfamic acid crystals will adhere to the inner walls of the condensation cylinder 202 and the inner cylinder 218. In order to facilitate blanking, a structure of the inner cylinder 218 and the scraping bars 216 that cooperate with each other is designed. In order to prevent the blanking gear ring 219 from blocking the condensation pipelines 210 and thus affecting the condensation effect, a plurality of through holes 220 are designed. In order to drive the inner cylinder 218 to rotate automatically, a structure of the blanking motor 221 is designed.

[0043] Refer to the appendix Figure 9 and the appendix Figure 12 - appendix Figure 13 , a cantilever 208 is further arranged on the outer wall of the support frame 201, and the second sealing cover 209 is fixedly arranged on the cantilever 208; a plurality of drain grooves 223 and a discharging cavity 224 arranged at intervals are formed in the second sealing cover 209; a sector plate 225 is rotatably arranged on the outer wall of the second sealing cover 209, a discharging gear ring 226 is installed on the outer wall of the sector plate 225, a discharging motor 227 is installed at the top of the second sealing cover 209, and a discharging gear 228 meshing with the discharging gear ring 226 is installed at the output end of the discharging motor 227.

[0044] In this embodiment: the central angles of the drain grooves 223 and the discharging cavity 224 are equal and both are in a sector structure, and the angle of a single sector plate on the sector plate 225 is equal to the sum of the drain grooves 223 and the discharging cavity 224. During the crystallization operation, the sector plate 225 completely blocks the drain grooves 223 and the discharging cavity 224. After the crystallization is completed, some uncrystallized sulfamic acid solution still remains inside the condensation cylinder 202. The sector plate 225 is driven to rotate by the discharging motor 227 to open the drain grooves 223, and at this time, the waste liquid is discharged from the condensation cylinder 202 through the drain grooves 223. Finally, the discharging motor 227 is started again to drive the sector plate 225 to close the drain grooves 223 and at the same time open the discharging cavity 224.

[0045] Refer to the appendix Figure 4 - appendix Figure 5 and the appendix Figure 7, a plurality of sets of first extrusion cavities 108 are formed inside the outer ring platform 102, and the locking rods 109 are movably installed in the first extrusion cavities 108; symmetric first reset cavities 110 are formed on both sides of the first extrusion cavities 108, and convex plates 111 movably arranged in the first reset cavities 110 are fixedly arranged on the outer walls of the locking rods 109. A first reset spring 112 is connected to the bottom of the convex plate 111; a locking block 113 is fixedly arranged on the inner side of the locking rod 109, and a plurality of locking grooves 114 cooperating with the locking block 113 are formed on the outer wall of the top cover 105.

[0046] In this embodiment: when the threaded ring 135 is installed, the inner wall of the threaded ring 135 presses against the locking rod 109. At this time, the locking rod 109 moves inward along the first extrusion cavity 108 and locks the upper locking groove 114 on the outer wall of the top cover 105 through the locking block 113. When the threaded ring 135 is disassembled, under the action of the first reset spring 112, the locking rod 109 automatically pops out and unlocks the outer wall of the top cover 105.

[0047] Refer to the appendix Figure 4 - appendix Figure 6 , a plurality of positioning members 115 are arranged at the bottom of the top cover 105. The positioning members 115 include a horizontal portion 116 and a vertical portion 117; a quick-lock cavity 104 is formed between the outer ring platform 102 and the inner ring platform 103. A positioning groove 118 for quickly positioning the positioning members 115 is formed at the bottom of the quick-lock cavity 104, and a locking groove 119 for locking the horizontal portion 116 is formed on the inner wall of the positioning groove 118 in the clockwise direction.

[0048] In this embodiment: when the top cover 105 is installed, first insert the positioning member 115 into the positioning groove 118. At this time, the top of the lifting block 121 is flush with the bottom of the positioning groove 118 under the action of the second reset spring 122. Then rotate the top cover 105 clockwise. When the horizontal portion 116 is inserted into the locking groove 119, the preliminary locking installation is completed. At this time, there is still a space for the lifting block 121 to lock between the outer wall of the vertical portion 117 and the inner wall of the positioning groove 118.

[0049] Refer to the appendix Figure 4 - appendix Figure 7, a lifting cavity 120 is formed at the bottom of the positioning groove 118. A lifting block 121 is movably installed in the lifting cavity 120, and a second reset spring 122 is connected to the bottom of the lifting block 121. A plurality of groups of second extrusion cavities 123 communicating with the lifting cavity 120 are formed on the outer ring platform 102. A linkage member 124 is movably installed at the bottom of the second extrusion cavity 123. An extrusion portion 125 cooperating with the lifting block 121 is arranged on the inner side of the linkage member 124. A lifting inclined surface 126 is arranged on the outer wall of the lifting block 121. A plurality of groups of third reset springs 127 are connected to the outer wall of the linkage member 124. A compression column 128 is movably arranged on the top of the linkage member 124. A lower inclined block 130 is arranged at the bottom of the compression column 128. An upper inclined block 129 abutted against the lower inclined block 130 is arranged on the top of the linkage member 124.

[0050] In this embodiment: When the threaded ring 135 is installed, its top will extrude the compression column 128. Since the upper inclined block 129 and the lower inclined block 130 are in a fitting state, the linkage member 124 will slide inward along the bottom of the second extrusion cavity 123 at this time. Under the action of the lifting inclined surface 126, the lifting block 121 moves upward along the lifting cavity 120. At this time, the lifting block 121 will lock the space between the outer wall of the vertical portion 117 and the inner wall of the positioning groove 118.

[0051] Refer to the appendix Figure 5 and the appendix Figure 7 , symmetric second reset cavities 131 are formed on both sides of the second extrusion cavity 123. Second convex plates 132 fixedly arranged on both sides of the compression column 128 are movably installed in the second reset cavities 131. A fourth reset spring 133 is connected to the bottom of the second convex plates 132. A stirring motor 106 is installed on the top of the top cover 105. A stirring shaft 107 is arranged at the output end of the stirring motor 106. A control panel 134 is arranged on the outer wall of the sulfonation kettle 1.

[0052] In this embodiment: In order to further improve the stability and drive the compression column 128 to automatically return to its original state, the structure of the fourth reset spring 133 is designed. In order to improve the reaction effect of urea and fuming sulfuric acid, the structure of the stirring motor 106 is designed.

[0053] Working principle of the present invention: When the device is in use, first, the top cover 105 is quickly installed through the locking rod 109 and the lifting block 121. Then, urea and fuming sulfuric acid are added into the sulfonation kettle 1 in proportion through the feeding port, and the stirring motor 106 is started to fully stir the raw materials. After the sulfonation reaction is completed, a small amount of dilute sulfuric acid is added into the sulfonation kettle 1 to adjust the pH value, and then the discharge valve 137 is opened. The aminosulfonic acid solution is transported to the inclined condensation cylinder 202 through the diversion pipe 136. Then, an external condensation gas device is connected to the air inlet nozzle 212. At this time, the condensation gas sequentially passes through the air inlet annular groove 211, the condensation pipeline 210 and the air outlet annular groove 213 to quickly cool the inner wall of the condensation cylinder 202. The flipping motor 205 is started to drive the condensation cylinder 202 to rotate, and the solution sprayed through the nozzle 138 is quickly condensed and crystals are precipitated. After the crystallization is completed, the discharge motor 227 is started to drive the sector plate 225 to rotate and open the liquid discharge groove 223. At this time, the waste liquid is discharged from the condensation cylinder 202 through the liquid discharge groove 223. Finally, the discharge motor 227 and the feeding motor 221 are started. While the discharge motor 227 drives the sector plate 225 to close the liquid discharge groove 223, the discharge cavity 224 is opened, and the feeding motor 221 drives the inner cylinder 218 to rotate and scrape and discharge the aminosulfonic acid crystals.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and creative features disclosed herein.

Claims

1. A continuous crystallization device for the production of sulfamic acid, comprising a sulfonation kettle and a crystallization mechanism, characterized in that: The top of the sulfonation kettle is provided with a kettle opening. The top of the kettle opening is fixedly provided with a coaxial outer ring platform and an inner ring platform. A top cover is movably installed between the outer ring platform and the inner ring platform. A plurality of locking rods are movably arranged inside the outer ring platform. A plurality of lifting blocks and compression columns are also arranged vertically inside the outer ring platform. A threaded ring is threadedly installed on the outer ring platform. The threaded ring triggers a plurality of the locking rods and the lifting blocks to double-lock the top cover. The bottom of the sulfonation kettle is provided with a diversion pipe, and a blanking valve is installed on the diversion pipe. The crystallization mechanism includes a condensation cylinder. The end of the diversion pipe is provided with a plurality of spray heads located inside the condensation cylinder. A plurality of condensation pipelines are arranged on the inner wall of the condensation cylinder. A first airtight cover fixedly connected to the condensation cylinder is arranged on the diversion pipe. An air inlet annular groove communicating with the condensation pipeline is arranged on the inner wall of the first airtight cover, and an air inlet nozzle is arranged on the outer wall of the first airtight cover. A second airtight cover is also installed on the right side of the condensation cylinder. An air outlet annular groove communicating with the condensation pipeline is arranged on the inner wall of the second airtight cover, and an air outlet nozzle is arranged on the outer wall of the second airtight cover. A plurality of positioning members are arranged at the bottom of the top cover. The positioning members include a horizontal part and a vertical part. A quick-lock cavity is formed between the outer ring platform and the inner ring platform. A positioning groove for quickly positioning the positioning members is arranged at the bottom of the quick-lock cavity. A locking groove for locking the horizontal part is opened on the inner wall in the clockwise direction of the positioning groove. A lifting cavity is arranged at the bottom of the positioning groove. The lifting block is movably installed in the lifting cavity, and a second return spring is also connected to the bottom of the lifting block. A plurality of extrusion cavities II communicating with the lifting cavity are arranged on the outer ring platform. A linkage member is movably installed at the bottom of the extrusion cavity II. An extrusion part cooperating with the lifting block is arranged on the inner side of the linkage member, and a lifting inclined surface is arranged on the outer wall of the lifting block. A plurality of third return springs are connected to the outer wall of the linkage member. The compression column is movably arranged on the top of the linkage member. A lower inclined block is arranged at the bottom of the compression column, and an upper inclined block abutting against the lower inclined block is arranged on the top of the linkage member. When the threaded ring is installed, the threaded sleeve will squeeze the locking rod and the compression column. At this time, the locking rod moves inward and locks the outer wall of the top cover.

2. The continuous crystallization device for sulfamic acid production according to claim 1, characterized in that: The crystallization mechanism further includes a support frame fixedly installed on the ground. The top of the support frame is fixedly provided with a rotating hoop. The condensation cylinder is movably installed inside the rotating hoop. A turning gear ring is also installed on the outer wall of the condensation cylinder. A turning motor is installed on the outer wall of the support frame, and a turning gear meshing with the turning gear ring is installed at the output end of the turning motor.

3. The continuous crystallization device for sulfamic acid production according to claim 1, wherein: A rotating cavity is formed on the inner wall of the condensation cylinder. A plurality of scraping bars located inside the rotating cavity are further arranged on the inner wall of the condensation cylinder. A rotating groove penetrating the outer wall of the condensation cylinder is formed at the top of the rotating cavity. An inner cylinder is movably installed in the rotating cavity. A blanking gear ring movably arranged in the rotating groove is fixedly arranged at the top of the inner cylinder. Through holes communicating with the two condensation pipes are formed in the blanking gear ring. A blanking motor is installed on the outer wall of the condensation cylinder. A blanking gear meshing with the blanking gear ring is installed at the output end of the blanking motor.

4. The continuous crystallization device for sulfamic acid production according to claim 2, wherein: A cantilever is further arranged on the outer wall of the support frame. The second airtight cover is fixedly arranged on the cantilever. A plurality of spaced drain grooves and discharge cavities are formed in the second airtight cover.

5. A continuous crystallization device for sulfamic acid production according to claim 4, characterized in that: A sector plate is rotatably arranged on the outer wall of the second airtight cover. A discharge gear ring is further installed on the outer wall of the sector plate. A discharge motor is installed at the top of the second airtight cover. A discharge gear meshing with the discharge gear ring is installed at the output end of the discharge motor.

6. The continuous crystallization device for sulfamic acid production according to claim 1, characterized in that: A plurality of first extrusion cavities are formed inside the outer ring platform. The locking rod is movably installed in the first extrusion cavity. Symmetrical first reset cavities are formed on both sides of the first extrusion cavity. A first convex plate movably arranged in the first reset cavity is fixedly arranged on the outer wall of the locking rod. A first reset spring is connected to the bottom of the first convex plate. A locking block is fixedly arranged on the inner side of the locking rod. A plurality of locking grooves cooperating with the locking block are formed on the outer wall of the top cover.

7. The continuous crystallization device for sulfamic acid production according to claim 1, characterized in that: Symmetrical second reset cavities are formed on both sides of the second extrusion cavity. Second convex plates movably installed in the second reset cavities are fixedly arranged on both sides of the compression column. A fourth reset spring is connected to the bottom of the second convex plate. A stirring motor is installed at the top of the top cover. A stirring shaft is arranged at the output end of the stirring motor. A control panel is arranged on the outer wall of the sulfonation kettle.

8. A method for using a continuous crystallization device for sulfamic acid production according to any one of claims 1-7, characterized in that, The method comprises the following steps: S1. Quickly install the top cover through the locking rod and the lifting block, and then add urea and fuming sulfuric acid into the sulfonation kettle in proportion. S2. After the sulfonation reaction is completed, add a small amount of dilute sulfuric acid into the sulfonation kettle and adjust the pH value. S3. Open the blanking valve, and convey the sulfamic acid solution to the condensation cylinder through the diversion pipe. S4. Input condensation gas into the air inlet nozzle, and drive the condensation cylinder to rotate through a driving device. S5. Discharge the excess liquid through the second airtight cover, and collect the sulfamic acid crystals.

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