A kind of aminosulfonic acid production equipment and production process

Abstract

The present invention relates to the technical field of aminosulfonic acid production, and discloses an aminosulfonic acid production device and a production process, wherein the aminosulfonic acid production device comprises a kettle body and a plurality of legs, a plurality of reaction chambers arranged in the kettle body, the reaction chamber is connected to the kettle body through a plurality of connecting plates, a liquid inlet pipe and a liquid outlet pipe are respectively installed on the surface of the reaction chamber, the volume of the plurality of reaction chambers gradually decreases from top to bottom, an annular reaction groove is provided in the reaction chamber, the plurality of reaction chambers do not intersect at the same vertical position, a material distribution cap is rotatably connected to the top of the reaction chamber, a connecting pipe is fixedly connected to the center position of the material distribution cap, adjacent connecting pipes are spaced a certain distance apart, a heat dissipation jacket is arranged on the inner wall of the reaction chamber, and a heat dissipation pipe is arranged between the heat dissipation jacket and the inner wall of the reaction chamber. The present invention reduces the heat dissipation pressure, increases the urea addition speed, reacts layer by layer and cools down layer by layer, and effectively improves the reaction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of aminosulfonic acid production, and more specifically, to aminosulfonic acid production equipment and a production process. Background Art

[0002] Aminosulfonic acid is a monobasic inorganic solid strong acid, also known as solid sulfuric acid. It is used as a water treatment chemical cleaning agent, electroplating polishing agent, asphalt emulsifier, chlorine stabilizer, disinfectant bleaching agent, sulfonating agent, flame retardant, herbicide, catalyst, etc. It is used in medicine, food, pesticide, electrochemistry, cleaning and other fields, and is widely used in industrial production and research.

[0003] In industry, aminosulfonic acid is mostly prepared by the liquid phase method because its reaction is easy to control and its by-products have little impact on the environment. The specific method is to carry out a sulfonation reaction between urea and fuming sulfuric acid at a certain temperature to produce a crude aminosulfonic acid product, which is then recrystallized, filtered, dried, etc. to obtain the desired product.

[0004] During the preparation process, oleum is placed in a reactor, and a quantitatively matched urea is slowly added to react. Generally speaking, the reaction of urea and oleum will generate a large amount of heat, so urea needs to be added slowly and the oleum needs to be stirred to disperse the urea. However, in the actual operation process, the reaction concentration, temperature, and environmental factors may still cause severe local or overall heating. In order to ensure that the reaction is at the optimal temperature, the reactor needs to be cooled. Currently, most reactors use external heat dissipation, and the heat exchange effect near the center of the reactor is not good, resulting in a local temperature increase. The urea addition time is prolonged, which will affect the oleum output rate to a certain extent. Summary of the invention

[0005] The present invention provides a patented aminosulfonic acid production device and production process, which solves the technical problem in the related technology that the output of oleum is reduced due to poor heat dissipation.

[0006] The present invention provides a sulfamic acid production device and production process, including a kettle body and a plurality of legs;

[0007] A plurality of reaction chambers are arranged in the kettle body, the reaction chambers are connected to the kettle body through a plurality of connecting plates, a liquid inlet pipe and a liquid outlet pipe are respectively installed on the surface of the reaction chamber, the volume of the plurality of reaction chambers gradually decreases from top to bottom, an annular reaction groove is provided in the reaction chamber, the plurality of reaction chambers do not intersect at the same vertical position, a material distribution cap is rotatably connected to the top of the reaction chamber, a connecting pipe is fixedly connected to the center of the material distribution cap, and adjacent connecting pipes are spaced a certain distance apart;

[0008] A heat dissipation jacket is arranged on the inner wall of the reaction chamber, and a heat dissipation pipe is arranged between the heat dissipation jacket and the inner wall of the reaction chamber, and a cooling inlet pipe and a cooling outlet pipe are fixedly connected at both ends of the heat dissipation pipe respectively;

[0009] The top of the kettle body is rotatably connected with a rotating shaft, and the rotating shaft is connected to the kettle body through a driving assembly. A feeding shaft is passed through the rotating shaft, and a feeding mechanism is installed on the upper end of the feeding shaft. A plurality of discharge holes are provided on the lower end surface of the feeding shaft, and a plurality of synchronization bars are fixedly connected to the surface of the feeding shaft. A plurality of slots adapted to the synchronization bars are provided on the inner walls of the rotating shaft and a plurality of connecting tubes, and a plurality of horizontal plates are rotatably connected to the surface of the feeding shaft, and the horizontal plates are connected to the kettle body through a cylinder.

[0010] The lower end of the distributing cap extends into the reaction tank and is provided with a stirring component for stirring the reactants.

[0011] Preferably, a conical block is fixedly connected to the bottom of the discharge shaft, the conical block and the plurality of discharge holes are arranged at the same height, a guide groove connected to the card groove is provided on the top of the inner wall of the connecting tube, and the surface of the guide groove is arc-shaped.

[0012] Preferably, the stirring assembly includes a plurality of fixed shafts fixedly connected to the dispensing cap near the bottom surface, the surface of the fixed shaft is rotatably connected to a rotating block, the surface of the rotating block is provided with a plurality of material storage grooves, one side of the rotating block is fixedly connected to a gear, the inner wall of the reaction tank is fixedly connected to a rack matched with the gear, the surface of the gear is fixedly connected to a plurality of stirring plates, the stirring plates are arranged in the material storage groove, and the surface of the fixed shaft is respectively provided with a feed port and a discharge port matched with the material storage groove.

[0013] Preferably, a baffle is fixedly connected to the surface of the distributing cap near the top of the reaction tank, a plurality of screens are arranged on the surface of the baffle, and an auxiliary through hole is opened on the surface of the baffle above the rotating block.

[0014] Preferably, two discharge ports are provided, and a protrusion is fixedly connected to the inner wall of the fixed shaft between the two discharge ports, and the center of the protrusion protrudes upward.

[0015] Preferably, it also includes an insulation component, which includes a plurality of sliding plates fixedly connected to the lower surface of the horizontal plate, the lower ends of the sliding plates penetrate the kettle body and extend inside the kettle body, the inner wall of the kettle body is provided with a sliding groove adapted to the sliding plates, the lower end of the sliding plate is fixedly connected to a fixed block, a push rod is slidably connected inside the fixed block, the push rod is connected to the sliding plate through a spring, one end of the push rod is fixedly connected to a heat pipe, the heat pipe is "L" shaped, and the upper and lower ends of the heat pipe are respectively attached to two adjacent reaction chambers.

[0016] Preferably, a plurality of guide rails are fixedly connected to the inner wall of the kettle body, guide rods adapted to the guide rails are fixedly connected to both sides of the push rod, the upper and lower ends of the guide rails are both arranged in an outwardly flared opening shape, and thermal insulation cotton is fixedly connected to the surface of the heat pipe.

[0017] Preferably, the driving assembly comprises a driving disk fixedly connected to the surface of the rotating shaft, a driving motor is installed on the surface of the kettle body, and an output end of the driving motor is connected to the driving disk via a belt.

[0018] Preferably, the unloading mechanism comprises a discharge box fixedly connected to the top of the unloading shaft, and a discharge valve for controlling the unloading is installed at the connection between the discharge box and the unloading shaft.

[0019] A process for producing aminosulfonic acid comprises the following steps:

[0020] S1: Add oleum into the uppermost reaction chamber through the liquid inlet pipe, and add urea through the discharge box, open the drive assembly and the discharge valve, and the urea passes through the discharge hole and is dispersed by the rotating distribution cap to enter the annular reaction tank for mixing and reaction with oleum;

[0021] S2: uniformly mixing oleum and urea through a stirring assembly, and controlling the reaction temperature through a heat dissipation pipe until a mixture is obtained;

[0022] S3: After the urea in the uppermost reaction bin is added, the discharge valve is closed, and the cylinder is contracted to drive the discharge shaft downward, and the lower end of the discharge shaft is inserted into the connecting pipe where the next layer of reaction bin is located, driving the next layer of the distributing cap to rotate, and the discharge valve is opened to continue the urea discharge and react with fuming sulfuric acid;

[0023] S4: The mixed material obtained in step S2 is discharged from the liquid outlet pipe, and the finished aminosulfonic acid is obtained after separation and crystallization.

[0024] The beneficial effects of the present invention are:

[0025] The present invention divides the reaction chambers into several groups, sets them in a ring shape, and gradually reduces the volume downward, thereby reducing the amount of oleum in a unit volume, and evenly distributes the unit amount of oleum in several groups of reaction chambers, thereby reducing the problem of poor heat dissipation effect during reaction caused by direct accumulation of oleum. Moreover, since several groups of reaction chambers do not intersect each other at the same vertical position, the independence between layers is effectively improved, the heat conduction between layers is reduced, and the heat dissipation pressure is alleviated. Accordingly, since the heat dissipation pressure is reduced and the reaction chambers are divided into multiple groups, the urea amount demand of a single reaction chamber is reduced, so the urea addition speed can be correspondingly accelerated, and after the single layer of urea is added, it can be immediately switched to the next layer, and urea can be continuously released for reaction, and the reaction is performed layer by layer and the temperature is lowered layer by layer, thereby effectively improving the heat dissipation effect.

[0026] The present invention transfers the heat generated by the reaction in the upper reaction chamber to the surface of the lower reaction chamber that is about to react by setting a heat preservation component, and preheats and insulates the oleum inside to keep it warm to the optimal reaction temperature, so that urea is more likely to react when entering. While the heat is dissipated from the upper reaction chamber, the lower layer is insulated, which effectively improves the heat exchange utilization rate, speeds up the reaction time to a certain extent, and improves the output efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the aminosulfonic acid production equipment of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the aminosulfonic acid production equipment of the present invention after removing the kettle body;

[0029] Figure 3 This is a cross-sectional view of the aminosulfonic acid production equipment of the present invention for showing a single reaction chamber and its internal structure;

[0030] Figure 4 The aminosulfonic acid production equipment of the present invention Figure 3 A in the enlarged view;

[0031] Figure 5 It is a partial schematic diagram of the aminosulfonic acid production equipment of the present invention for displaying the stirring component;

[0032] Figure 6 It is a schematic diagram of the aminosulfonic acid production equipment of the present invention for showing the connection relationship between the feed shaft and the connecting pipe;

[0033] Figure 7 This is a cross-sectional view of the aminosulfonic acid production equipment of the present invention for showing the internal structure of the kettle;

[0034] Figure 8 The aminosulfonic acid production equipment of the present invention is used to separately display the position relationship diagram of several heat dissipation pipes;

[0035] Fig. 9 It is a schematic diagram of the heat preservation component of the aminosulfonic acid production equipment of the present invention;

[0036] Fig.10 It is a schematic diagram of the aminosulfonic acid production equipment of the present invention for showing the matching state of the guide rod and the guide rail.

[0037] In the figure: 1, kettle body; 11, support foot; 12, rotating shaft; 13, driving plate; 14, driving motor; 2, unloading shaft; 21, synchronous bar; 22, conical block; 221, discharge hole; 23, discharge box; 231, unloading valve; 3, reaction chamber; 31, distributing cap; 311, connecting pipe; 312, card slot; 313, guide slot; 314, baffle; 315, screen; 316, auxiliary through hole; 32, fixed shaft; 321, feed port; 322, discharge port; 323 , convex block; 33, rotating block; 331, stirring plate; 332, gear; 333, rack; 34, heat dissipation pipe; 341, heat dissipation jacket; 342, cooling inlet pipe; 343, cooling outlet pipe; 35, liquid inlet pipe; 36, liquid outlet pipe; 37, connecting plate; 4, heat conduction pipe; 41, thermal insulation cotton; 42, sliding plate; 421, slide groove; 422, cross plate; 423, cylinder; 43, fixed block; 431, push rod; 432, guide rod; 433, spring; 44, guide rail. DETAILED DESCRIPTION

[0038] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0039] Embodiment 1:

[0040] This embodiment discloses a sulfamic acid production device, such as Figure 1-Figure 10 As shown, it includes: a kettle body 1 and a plurality of legs 11, the legs 11 are used to support the kettle body 1, the number of the legs 11 is determined according to the weight of the kettle body 1 that can be supported, and the legs 11 are fixed to the bottom of the kettle body 1; a plurality of reaction chambers 3 arranged in the kettle body 1, the reaction chamber 3 is connected to the kettle body 1 through a plurality of connecting plates 37, the two ends of the connecting plates 37 are respectively fixedly connected to the reaction chamber 3 and the inner wall of the kettle body 1, so as to fix the reaction chamber 3, and the surface of the reaction chamber 3 is respectively installed with a liquid inlet pipe 35 and a liquid outlet pipe 36, correspondingly, the liquid inlet pipe 35 is located at a relatively upper position of the reaction chamber 3, and the liquid outlet pipe 36 is located at a relatively upper position of the reaction chamber 3. The tube 36 is located near the bottom of the reaction bin 3, and both penetrate the kettle body 1 and extend outside the kettle body 1. Solenoid valves can be installed on the surfaces of the liquid inlet pipe 35 and the liquid outlet pipe 36 to facilitate feeding and discharging. The volume of the reaction bins 3 gradually decreases from top to bottom. An annular reaction groove is provided in the reaction bin 3. The reaction bins 3 do not intersect at the same vertical position. The top of the reaction bin 3 is rotatably connected with a distributing cap 31, and the center of the distributing cap 31 is fixedly connected with a connecting pipe 311. Adjacent connecting pipes 311 are spaced a certain distance apart, and the spacing distance is used for discharging, i.e., urea.

[0041] Specifically, the number of reaction chambers 3 is set according to actual reaction needs. In this article, it is set to three groups, namely, upper, middle and lower groups. The reaction chamber 3 is annular, and the annular diameter gradually decreases from top to bottom, which can effectively reduce the longitudinal interlayer heat conduction. The dividing cap 31 is conical, buckled on the reaction chamber 3, and can rotate in a circle along the center of the reaction chamber 3 as the axis.

[0042] The heat dissipation jacket 341 is generally made of stainless steel, aluminum alloy and other materials, and is arranged on the inner wall of the reaction chamber 3. A heat dissipation pipe 34 is arranged between the heat dissipation jacket 341 and the inner wall of the reaction chamber 3. The heat dissipation pipe 34 is fixedly connected to the heat dissipation jacket 341 and the reaction chamber 3, respectively. The two ends of the heat dissipation pipe 34 are fixedly connected with a cooling inlet pipe 342 and a cooling outlet pipe 343, respectively. The cooling inlet pipe 342 and the cooling outlet pipe 343 both penetrate the kettle body 1 and extend outside the kettle body 1. The penetration is sealed and connected. The cooling inlet pipe 342 and the cooling outlet pipe 343 are both connected to an external compressor for circulating coolant for heat dissipation. Temperature sensors can be arranged at multiple locations on the surface of each layer of the reaction chamber 3. According to the value of the temperature sensor, the temperature of the coolant is controlled by the external compressor. The coolant enters through the cooling inlet pipe 342, circulates through the heat dissipation pipe 34, and passes through the cooling outlet pipe 343 and takes away the heat, so that the reaction temperature is constant.

[0043] A rotating shaft 12 is rotatably connected to the top of the kettle body 1, and the rotating shaft 12 is connected to the kettle body 1 through a driving component. A feeding shaft 2 is passed through the rotating shaft 12, and a feeding mechanism is installed on the upper end of the feeding shaft 2. A plurality of discharge holes 221 are provided on the lower end surface of the feeding shaft 2, and a plurality of synchronization bars 21 are fixedly connected to the surface of the feeding shaft 2. A plurality of card slots 312 adapted to the synchronization bars 21 are provided on the inner walls of the rotating shaft 12 and a plurality of connecting tubes 311. When the synchronization bars 21 are inserted into the card slots 312, the rotating shaft 12 and the feeding shaft 2 rotate synchronously, or the rotating shaft 12, the feeding shaft 2 and the connecting tube 311 rotate synchronously. A plurality of cross plates 422 are rotatably connected to the surface of the feeding shaft 2, and the cross plates 422 are connected to the kettle body 1 through cylinders 423. The output and contraction of the cylinders 423 will drive the cross plates 422 to move up and down, thereby moving down or up the feeding shaft 2 to engage with the connecting tubes 311 at different heights.

[0044] The lower end of the distributing cap 31 extends into the reaction tank and is provided with a stirring assembly for stirring the reactants.

[0045] Specifically, after the cylinder 423 outputs and controls the height of the unloading shaft 2 so that it is inserted into the connecting tube 311, the driving assembly drives the rotating shaft 12 to rotate under the cooperation of the synchronization bar 21 and the card slot 312, and then cooperates with the unloading shaft 2 to make the connecting tube 311 rotate, and the distributing cap 31 can rotate on the surface of the reaction bin 3. At this time, urea is passed into the unloading shaft 2 through the unloading mechanism, and the urea is discharged through the plurality of discharge holes 221 at the bottom thereof, and the urea is evenly dispersed through the rotating distributing cap 31, and the urea is lowered into the reaction tank to be mixed with fuming sulfuric acid. The reaction is combined and evenly stirred by the stirring component. Since the reaction bin 3 is annular as a whole, its lateral width is reduced compared with the barrel-shaped reactor. Therefore, the heat dissipation pressure of the heat dissipation pipe 34 arranged on its inner wall is correspondingly reduced, and the corresponding speed of adding urea can be accelerated accordingly. After the quantitative urea is discharged, the discharge shaft 2 is further lowered by the cylinder 423 to be inserted into the connecting pipe 311 where the next layer of reaction bin 3 is located, and the same steps are continued to be performed to add urea to the oleum in the next layer of reaction bin 3 for reaction mixing.

[0046] It is worth noting that when the feed shaft 2 is inserted into the first layer, that is, the topmost connecting tube 311, the driving component only drives the first layer of the dividing cap 31 and the connecting tube 311 to rotate, while the dividing caps 31 of the following layers will not rotate. In addition, when the feed shaft 2 is continuously inserted into two layers of connecting tubes 311, the two layers of dividing caps 31 will rotate synchronously. Although the upper layer of urea has been added, the dividing cap 31 can still drive the stirring component to stir the fuming sulfuric acid and urea mixture, thereby improving the mixing reaction efficiency.

[0047] like Figure 4 as well as Figure 6 As shown, in the present embodiment, a conical block 22 is fixedly connected to the bottom of the discharge shaft 2, and the conical block 22 and a plurality of discharge holes 221 are arranged at the same height. Specifically, the lowest position of the conical block 22 is at the same height as the bottom of the discharge hole 221. Therefore, the urea particles falling from the top of the discharge shaft 2 will be scattered to the surroundings by the conical block 22 and pass through the plurality of discharge holes 221. A guide groove 313 connected to the card slot 312 is provided on the top of the inner wall of the connecting tube 311. The surface of the guide groove 313 is arc-shaped. Specifically, the guide groove 313 is convenient for guiding the synchronization bar 21 into the card slot 312. Due to its arc shape, when the synchronization bar 21 enters the inner wall of the connecting tube 311 at any angle, it will be guided by the guide groove 313 and be stuck into the card slot 312, or directly enter the card slot 312.

[0048] like Figure 3 and Figure 5As shown, in the present embodiment, the stirring assembly includes a plurality of fixed shafts 32 fixedly connected to the dispensing cap 31 near the bottom surface, the surface of the fixed shaft 32 is rotatably connected with a rotating block 33, the surface of the rotating block 33 is provided with a plurality of material storage grooves, a gear 332 is fixedly connected to one side of the rotating block 33, a rack 333 adapted to the gear 332 is fixedly connected to the inner wall of the reaction groove, the gear 332 is meshed with the rack 333, a plurality of stirring plates 331 are fixedly connected to the surface of the gear 332, the stirring plates 331 are arranged in the material storage groove and are located at the center of the material storage groove, and a feed port 321 and a discharge port 322 adapted to the material storage groove are respectively provided on the surface of the fixed shaft 32.

[0049] Specifically, when the distributing cap 31 rotates, the fixed shaft 32 on its surface will be driven to rotate synchronously, thereby causing the gear 332 meshing with the rack 333 to rotate in coordination, so that the stirring plate 331 stirs the mixed liquid. During this period, some urea particles falling through the distributing cap 31 will temporarily enter the storage tank and enter the fixed shaft 32 through the feed port 321. As the rotating block 33 continues to rotate, after the storage tank and the discharge port 322 are connected, the urea particles enter the storage tank along the discharge port 322 and are discharged to a deeper position of the mixed liquid following the stirring plate 331. Compared with the urea particles only penetrating and mixing from the liquid surface, mixing directly at a deeper level can improve the mixing reaction efficiency and accelerate the reaction time.

[0050] Furthermore, in the present embodiment, a baffle 314 is fixedly connected to the surface of the distribution cap 31 near the top of the reaction tank. The baffle 314 is annular and just covers the top of the reaction tank. A plurality of screens 315 are arranged on the surface of the baffle 314. The aperture of the screen 315 is determined according to the average size of the urea particles. The arrangement of the screen 315 can prevent urea from accumulating into a certain area of ​​the oleum mixed liquid, causing the problem of excessive concentration in some areas and difficult temperature control. The urea entering the mixed liquid is averaged per unit time by screening through the screen 315. Since the baffle 314 rotates synchronously with the distribution cap 31, the accumulated urea can also be gradually dispersed during the rotation, thereby improving the mixing efficiency. An auxiliary through hole 316 is opened on the surface of the baffle 314 above the rotating block 33. Some urea particles falling from the auxiliary through hole 316 can enter the storage tank on the surface of the rotating block 33, which is convenient for deeper mixing.

[0051] Furthermore, in the present embodiment, two discharge ports 322 are provided, both of which are open downward, and a protrusion 323 is fixedly connected to the inner wall of the fixed shaft 32 between the two discharge ports 322, and the center of the protrusion 323 protrudes upward. Through the setting of the protrusion 323, the incoming urea is divided into two parts, which enter the two discharge ports 322 respectively, and are dispersed to different positions to improve the uniform mixing degree.

[0052] like Figure 1 , Fig. 9 and Fig.10 As shown, in the present embodiment, a heat preservation component is also included, which includes a plurality of sliding plates 42 fixedly connected to the lower surface of the transverse plate 422. The lower end of the sliding plate 42 passes through the kettle body 1 and extends into the kettle body 1. The inner wall of the kettle body 1 is provided with a slide groove 421 adapted to the sliding plate 42. The sliding plate 42 is limitedly slidable in the slide groove 421. The lower end of the sliding plate 42 is fixedly connected to a fixed block 43. A push rod 431 is slidably connected in the fixed block 43. The push rod 431 is connected to the sliding plate 42 through a spring 433. Both ends of the spring 433 are fixedly connected to the push rod 431 and the sliding plate 42, respectively. One end of the push rod 431 is fixedly connected to a heat conduction pipe 4, which is a copper pipe or a carbon steel pipe. The heat conduction pipe 4 is "L"-shaped. The heat conduction pipe 4 is a closed ring pipe, and the upper and lower ends of the heat conduction pipe 4 are respectively attached to two adjacent reaction chambers 3.

[0053] Specifically, a heat pipe 4 is provided, and its upper and lower ends are respectively attached between two corresponding reaction chambers 3. In this way, when the upper reaction chamber 3 reacts and releases heat, the heat is conducted through the heat pipe 4. Since heat is always transferred from a high-temperature object to a low-temperature object, the middle reaction chamber 3 does not participate in the reaction at this time, and its temperature is lower than that of the upper reaction chamber 3. Therefore, the heat pipe 4 conducts the heat to the middle reaction chamber 3, heats and keeps the middle reaction chamber 3 warm, and keeps the temperature of the middle reaction chamber 3 at 20-40 degrees, which is the optimal temperature for the fuming sulfuric acid to start the reaction. At the same time, the upper reaction chamber 3 can be cooled. By setting the spring 433, the heat pipe 4 can be made close to the reaction chamber 3 to improve the heat conduction efficiency. At this time, the heat pipe 4 is arranged between the upper reaction chamber 3 and the middle reaction chamber 3, and conducts the heat of the upper reaction chamber 3 to the middle reaction chamber 3.

[0054] Furthermore, a plurality of guide rails 44 are fixedly connected to the inner wall of the kettle body 1, and the guide rails 44 are arranged between the middle reaction chamber 3 and the lower reaction chamber 3. The guide rails 44 are inclined, and guide rods 432 adapted to the guide rails 44 are fixedly connected on both sides of the push rod 431. The upper and lower ends of the guide rails 44 are arranged to be outwardly opened, and the surface of the heat pipe 4 is fixedly connected with thermal insulation cotton 41. The thermal insulation cotton 41 can reduce heat loss and improve the thermal insulation effect.

[0055] Specifically, the reaction chamber 3 is set as three groups in this paper. When the middle reaction chamber 3 needs to react, it does not need to be kept warm and heated. Therefore, following the contraction of the cylinder 423, the cross plate 422 is driven to move downward, and the unloading shaft 2 is moved downward synchronously. The sliding plate 42 follows the cross plate 422 to move downward, driving the heat pipe 4 to move downward. During the downward movement of the heat pipe 4, the spring 433 will not pop out because it is closely attached to the middle reaction chamber 3. Until the guide rod 432 is stuck in the guide rail 44 and follows the inclined guidance of the guide rail 44, the push rod 431 is pushed out, and the spring 433 is stretched synchronously. At this time, due to the push rod 431 The heat pipe 4 is pushed forward to the surface of the lower reaction chamber 3 with a smaller diameter. When the spring 433 is fully relaxed, the heat pipe 4 is pushed to be close to the surface of the lower reaction chamber 3, and its upper end is attached to the bottom of the middle reaction chamber 3. In this way, the heat generated by the reaction in the middle reaction chamber 3 will be partially conducted to the surface of the lower reaction chamber 3 through the heat pipe 4, and the lower reaction chamber 3 will continue to be heated and kept warm. When the lower reaction chamber 3 needs to react, the heat pipe 4 will completely detach from the lower reaction chamber 3 as the sliding plate 42 continues to move downward, so as to avoid affecting the heat dissipation.

[0056] More specifically, when the sliding plate 42 moves upward, the guide rod 432 is inserted into the open lower end of the guide rail 44 and moves the compression spring 433 along the path of the guide rail 44 , so that the heat pipe 4 returns to its initial position, that is, between the upper reaction chamber 3 and the middle reaction chamber 3 .

[0057] It should be noted that the connection between the sliding plate 42 and the kettle body 1 is sealed, the rotation connection position between the rotating shaft 12 and the kettle body 1 is sealed, and the connection between the unloading shaft 2 and the rotating shaft 12 is sealed to avoid leakage of reaction by-products.

[0058] In this embodiment, the driving assembly includes a driving disk 13 fixedly connected to the surface of the rotating shaft 12, the driving disk 13 is located outside the kettle body 1, and a driving motor 14 is installed on the surface of the kettle body 1. The output end of the driving motor 14 is connected to the driving disk 13 through a belt. Specifically, the output end of the driving motor 14 is fixedly connected to an active disk, and the belt transmission is connected between the active disk and the driving disk 13. The driving motor 14 is a servo motor and can be connected to the driving disk 13 after being connected to a reducer to improve the rotation stability.

[0059] The unloading mechanism includes a discharge box 23 fixedly connected to the top of the unloading shaft 2. The discharge box 23 is closed and a sealing cover is installed on its surface. After opening the sealing cover, a unit amount of urea is put in and the sealing cover is tightly closed for sealing. A discharge valve 231 for controlling the unloading is installed at the connection between the discharge box 23 and the unloading shaft 2. The discharge valve 231 is a hopper valve or a solid valve, etc. The urea unloading is controlled by the discharge valve 231.

[0060] Embodiment 2:

[0061] In this embodiment, a sulfamic acid production process is proposed, comprising the following steps:

[0062] S1: Add oleum into the uppermost reaction bin 3 through the liquid inlet pipe 35, and add urea through the discharge box 23, open the drive assembly and the discharge valve 231, and the urea passes through the discharge hole 221 and is dispersed by the rotating distribution cap 31 to enter the annular reaction tank for mixing and reaction with oleum;

[0063] S2: uniformly mixing oleum and urea through a stirring assembly, and controlling the reaction temperature through a heat dissipation pipe 34 until a mixture is obtained;

[0064] S3: After the urea is added to the uppermost reaction bin 3, the discharge valve 231 is closed, and the cylinder 423 is contracted to drive the discharge shaft 2 to move downward, and the lower end of the discharge shaft 2 is inserted into the connecting pipe 311 where the next reaction bin 3 is located, driving the next layer of the distributing cap 31 to rotate, and the discharge valve 231 is opened to continue the urea discharge and react with the fuming sulfuric acid;

[0065] S4: The mixed material obtained in step S2 is discharged from the liquid outlet pipe 36, and the finished aminosulfonic acid is obtained after separation and crystallization.

[0066] The present invention provides a multi-layer reaction chamber 3, and the annular reaction chamber 3 improves the heat dissipation efficiency. The reaction chambers 3 react separately layer by layer, and heat transfer between layers is avoided. The heat control is stable, and the urea feeding speed can be increased. The reaction efficiency is improved by the stirring component, and the aminosulfonic acid output rate can be effectively improved to a certain extent.

[0067] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation mode. The above-mentioned specific implementation mode is merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make more forms of equivalent embodiments, all of which are within the protection of this embodiment.

Claims

1. A sulfamic acid production equipment, characterized in that, include: A kettle body (1) and a plurality of legs (11); A plurality of reaction chambers (3) are arranged in the kettle body (1), the reaction chambers (3) are connected to the kettle body (1) via a plurality of connecting plates (37), a liquid inlet pipe (35) and a liquid outlet pipe (36) are respectively installed on the surface of the reaction chambers (3), the volume of the plurality of reaction chambers (3) gradually decreases from top to bottom, an annular reaction groove is provided in the reaction chamber (3), the plurality of reaction chambers (3) do not intersect at the same vertical position, a material distribution cap (31) is rotatably connected to the top of the reaction chamber (3), a connecting pipe (311) is fixedly connected to the center of the material distribution cap (31), and adjacent connecting pipes (311) are spaced a certain distance apart; A heat dissipation jacket (341) is arranged on the inner wall of the reaction chamber (3), and a heat dissipation pipe (34) is arranged between the heat dissipation jacket (341) and the inner wall of the reaction chamber (3), and a cooling inlet pipe (342) and a cooling outlet pipe (343) are respectively fixedly connected at both ends of the heat dissipation pipe (34); The top of the kettle body (1) is rotatably connected to a rotating shaft (12), the rotating shaft (12) is connected to the kettle body (1) through a driving assembly, a material discharge shaft (2) is passed through the rotating shaft (12), a material discharge mechanism is installed at the upper end of the material discharge shaft (2), a plurality of discharge holes (221) are provided on the lower end surface of the material discharge shaft (2), a plurality of synchronization bars (21) are fixedly connected to the surface of the material discharge shaft (2), a plurality of slots (312) adapted to the synchronization bars (21) are provided on the inner walls of the rotating shaft (12) and the plurality of connecting tubes (311), a plurality of transverse plates (422) are rotatably connected to the surface of the material discharge shaft (2), and the transverse plates (422) are connected to the kettle body (1) through cylinders (423); The lower end of the material distribution cap (31) extends into the reaction tank and is provided with a stirring component for stirring the reactants.

2. A sulfamic acid production equipment according to claim 1, characterized in that, A conical block (22) is fixedly connected to the bottom of the discharge shaft (2), and the conical block (22) and the plurality of discharge holes (221) are arranged at the same height. A guide groove (313) connected to the clamping groove (312) is provided at the top of the inner wall of the connection tube (311), and the surface of the guide groove (313) is arc-shaped.

3. A sulfamic acid production equipment according to claim 1, characterized in that, The stirring assembly comprises a plurality of fixed shafts (32) fixedly connected to the surface of the material dispensing cap (31) near the bottom, a rotating block (33) rotatably connected to the surface of the fixed shaft (32), a plurality of material storage grooves are provided on the surface of the rotating block (33), a gear (332) is fixedly connected to one side of the rotating block (33), a rack (333) matched with the gear (332) is fixedly connected to the inner wall of the reaction groove, a plurality of stirring plates (331) are fixedly connected to the surface of the gear (332), the stirring plates (331) are arranged in the material storage groove, and a material inlet (321) and a material outlet (322) matched with the material storage groove are respectively provided on the surface of the fixed shaft (32).

4. A sulfamic acid production equipment according to claim 3, characterized in that, A baffle (314) is fixedly connected to the surface of the material distribution cap (31) near the top of the reaction tank, a plurality of screens (315) are arranged on the surface of the baffle (314), and an auxiliary through hole (316) is opened on the surface of the baffle (314) above the rotating block (33).

5. A sulfamic acid production equipment according to claim 4, characterized in that, Two discharge ports (322) are provided, and a protrusion (323) is fixedly connected to the inner wall of the fixed shaft (32) between the two discharge ports (322), and the center of the protrusion (323) protrudes upward.

6. A sulfamic acid production equipment according to any one of claims 1 to 5, characterized in that: The invention also comprises a heat-insulating component, wherein the heat-insulating component comprises a plurality of sliding plates (42) fixedly connected to the lower surface of the transverse plate (422), the lower end of the sliding plate (42) passes through the kettle body (1) and extends into the kettle body (1), the inner wall of the kettle body (1) is provided with a slide groove (421) adapted to the sliding plate (42), the lower end of the sliding plate (42) is fixedly connected to a fixed block (43), a push rod (431) is slidably connected inside the fixed block (43), the push rod (431) is connected to the sliding plate (42) via a spring (433), one end of the push rod (431) is fixedly connected to a heat-conducting pipe (4), the heat-conducting pipe (4) is in an "L" shape, and the upper and lower ends of the heat-conducting pipe (4) are respectively in contact with two adjacent reaction chambers (3).

7. A sulfamic acid production equipment according to claim 6, characterized in that: The inner wall of the kettle body (1) is fixedly connected to a plurality of guide rails (44), both sides of the push rod (431) are fixedly connected to guide rods (432) adapted to the guide rails (44), the upper and lower ends of the guide rails (44) are both arranged in an outwardly flared opening shape, and the surface of the heat conduction pipe (4) is fixedly connected to heat insulation cotton (41).

8. A sulfamic acid production equipment according to claim 1, characterized in that: The driving assembly comprises a driving disc (13) fixedly connected to the surface of a rotating shaft (12); a driving motor (14) is mounted on the surface of the kettle body (1); an output end of the driving motor (14) is connected to the driving disc (13) via a belt.

9. A sulfamic acid production equipment according to claim 1, characterized in that: The material discharge mechanism comprises a material discharge box (23) fixedly connected to the top of the material discharge shaft (2), and a material discharge valve (231) for controlling material discharge is installed at the connection between the material discharge box (23) and the material discharge shaft (2).

10. A process for producing sulfamic acid using the sulfamic acid production equipment according to any one of claims 1 to 9, characterized in that: The steps include: S1: Add oleum into the uppermost reaction chamber (3) through the liquid inlet pipe (35), and add urea through the discharge box (23), open the drive assembly and the discharge valve (231), and the urea passes through the discharge hole (221) and is dispersed by the rotating distribution cap (31) to enter the annular reaction tank to mix with the oleum for reaction; S2: uniformly mixing oleum and urea through a stirring assembly, and controlling the reaction temperature through a heat dissipation pipe (34) until a mixture is obtained; S3: After the urea is added to the uppermost reaction chamber (3), the discharge valve (231) is closed, and the cylinder (423) is contracted to drive the discharge shaft (2) to move downward, and the lower end of the discharge shaft (2) is inserted into the connecting pipe (311) where the next reaction chamber (3) is located, driving the next distributing cap (31) to rotate, and opening the discharge valve (231) to continue to discharge urea to react with fuming sulfuric acid; S4: The mixed material obtained in step S2 is discharged from the liquid outlet pipe (36) and separated and crystallized to obtain the finished aminosulfonic acid.

Images