Urea sulfate and ammonia tubular reactor

Abstract

The utility model relates to the technical field of reactors, in particular to a urea sulfate and ammonia tubular reactor which comprises a reactor body, the reactor body comprises a reaction container, and the surface of the reaction container is fixedly connected with a first feed port. According to the reaction device, the first rotating rod drives the first conical teeth to rotate, so that the second conical teeth can drive the second rotating rod to rotate under the action of the first conical teeth, the stirring rod and the scraper blade can rotate along with the second rotating rod, and urea sulfate and ammonia in the reaction container can be stirred through the rotation of the stirring rod; the contact area between urea sulfate and ammonia can be increased, the reaction can be more uniform and rapid, the urea sulfate and the ammonia can be fully mixed, the reaction efficiency can be improved, the reaction can be more complete, and therefore the granulation quality is improved; the inner wall of the reaction container can be scraped through rotation of the scraping plate, and accumulation of urea sulfate can be avoided; furthermore, urea sulfate and ammonia can be better mixed and reacted.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, specifically to a tubular reactor for urea sulfate and ammonia. Background Technology

[0002] Urea sulfate is a chemical substance, a white granular crystal, highly soluble in water but insoluble in organic solvents. Ammonia is an inorganic compound, a colorless gas with a strong, pungent odor, widely used in chemical, agricultural, and pharmaceutical industries. In the production of compound fertilizers, sulfuric acid and urea are reacted in a specific ratio to produce urea sulfate liquid, which is then granulated. Therefore, a tubular reactor is typically used to react urea sulfate and ammonia. A tubular reactor is a continuous-operation reactor with a large length-to-diameter ratio, belonging to the plug flow reactor category. Tubular reactors can be single-tube or multi-tube parallel structures; they can be empty tubes or filled tubes with granular catalyst to conduct heterogeneous catalytic reactions. When reacting urea sulfate and ammonia in a tubular reactor, urea is typically dissolved in water in a specific ratio. Then, a measured amount of concentrated sulfuric acid reacts with the urea solution to generate a urea sulfate solution. This solution, after metering, enters the tubular reactor. Simultaneously, liquid ammonia, also metered, enters the reactor, resulting in a rapid and intense reaction that generates a high-temperature ammonium urea sulfate slurry. This slurry, propelled by back pressure, is sprayed onto the solid bed in a rotary drum granulator, thus granulating compound fertilizer. The specific chemical reaction between urea sulfate and ammonia in a tubular reactor improves the quality and yield of compound fertilizer, reduces energy waste in the drying process, and achieves the goals of energy conservation, increased compound fertilizer yield and production efficiency, raw material savings, improved compound fertilizer quality, and enhanced pelleting rate.

[0003] In the prior art, when reacting urea sulfate and ammonia in a tubular reactor, urea sulfate and ammonia are usually added directly into the reactor for reaction. However, since the two cannot be well stirred during the reaction, the mixing of urea sulfate and ammonia in the reactor may not be sufficient, which is not conducive to improving reaction efficiency and ensuring the sufficiency of the reaction, thus hindering the improvement of granulation quality. Therefore, in order to solve the above problems, a tubular reactor for urea sulfate and ammonia is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a tubular reactor for urea sulfate and ammonia to solve the problem mentioned in the background art, where the mixture of urea sulfate and ammonia in the reactor may be insufficient due to the inability to stir them well during the reaction, which is detrimental to improving reaction efficiency, ensuring the sufficiency of the reaction, and thus hindering the improvement of granulation quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tubular reactor for urea sulfate and ammonia, comprising a body, the body including a reaction vessel, a first inlet fixedly connected to the surface of the reaction vessel, a feed pipe fixedly connected to the surface of the first inlet, a shut-off valve installed on the surface of the feed pipe, a regulating valve installed on the surface of the feed pipe, a flow meter installed on the surface of the feed pipe, a second inlet fixedly connected to the surface of the reaction vessel, the feed pipe fixedly connected to the surfaces of the first and second inlets, a discharge pipe fixedly connected to the surface of the reaction vessel, a nozzle provided at the bottom end of the discharge pipe, a granulator provided on one side of the reaction vessel, and the discharge pipe and the nozzle both located inside the granulator;

[0006] A mixing mechanism is provided inside the reaction vessel. The mixing mechanism includes a first rotating rod, which is movably connected to the inside of the reaction vessel. A first conical tooth is fixedly connected to the bottom end of the first rotating rod. A motor is fixedly installed at the top of the reaction vessel. A fixing block is fixedly connected to the inner wall of the reaction vessel. A second rotating rod is movably connected to the inner side of the fixing block. A second conical tooth is fixedly connected to the surface of the second rotating rod. A stirring rod is fixedly connected to the surface of the second rotating rod.

[0007] Preferably, the mixing mechanism further includes a connecting rod, which is fixedly connected to the surface of the second rotating rod, and a scraper is fixedly connected to the surface of the connecting rod.

[0008] Preferably, the end of the first rotating rod away from the first conical tooth is fixedly connected to the output end of the motor, and the stirring rods are evenly distributed in a ring array on the surface of the second rotating rod.

[0009] Preferably, the connecting rods are arranged in four groups and fixedly connected to the scraper, and the two ends of the connecting rods are respectively fixed to the second rotating rod and the scraper.

[0010] Preferably, a feeding mechanism is provided on the inner side of the first feed inlet, and the feeding mechanism further includes a movable plate. The movable plate is movably connected to the inner side of the first feed inlet. A fixed rod is fixedly connected to the inner wall of the first feed inlet. A connecting block is movably connected to the surface of the fixed rod. A movable rod is movably connected to the surface of the connecting block. A spring is fixedly connected to the surface of the connecting block.

[0011] Preferably, the movable plate is movably connected to the first feed port via a rotating shaft, the two ends of the movable rod are movably connected to the first feed port and the movable plate via rotating shafts, and the two ends of the spring are fixedly connected to the fixed rod and the connecting block, respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The first rotating rod drives the first conical tooth to rotate, which in turn drives the second conical tooth to rotate under the action of the first conical tooth. Consequently, the stirring rod and scraper will rotate under the action of the second rotating rod. The rotation of the stirring rod can stir the urea sulfate and ammonia in the reaction vessel, which helps to increase the contact area between urea sulfate and ammonia, making the reaction more uniform and rapid, and facilitating thorough mixing of the two. This helps to improve reaction efficiency and make the reaction more complete, thereby improving the granulation quality. The rotation of the scraper can scrape the inner wall of the reaction vessel, which can prevent the accumulation of urea sulfate, thus facilitating better mixing and reaction of urea sulfate and ammonia, while reducing the waste of ammonium urea sulfate slurry.

[0014] 2. The movable plate design slows down the falling speed of urea sulfate, ensuring more sufficient contact and reaction time between urea sulfate and ammonia within the reaction vessel. This improves reaction efficiency, makes the reaction more complete, and allows for better control of the reaction process. Simultaneously, the movable block on the surface of the fixed rod, combined with the movable rod and spring, allows the movable plate to move when urea sulfate falls, reducing the impact of the urea sulfate on the plate and providing protection. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial front sectional view of the reaction vessel and stirring rod of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0018] Figure 4 This is a side sectional view of the structure of the stirring rod and scraper of this utility model.

[0019] In the diagram: 1. Reaction vessel; 11. First feed inlet; 12. Feed pipe; 13. Shut-off valve; 14. Regulating valve; 15. Flow meter; 16. Second feed inlet; 17. Discharge pipe; 18. Nozzle; 19. Granulator; 2. First rotating rod; 21. First conical tooth; 22. Motor; 23. Fixed block; 24. Second rotating rod; 25. Second conical tooth; 26. Stirring rod; 27. Connecting rod; 28. Scraper; 3. Movable plate; 31. Fixed rod; 32. Connecting block; 33. Movable rod; 34. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 One embodiment provided by this utility model:

[0022] The shut-off valve 13, regulating valve 14, flow meter 15 and motor 22 used in this application are products that can be purchased directly from the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0023] A tubular reactor for urea sulfate and ammonia includes a body comprising a reaction vessel 1. A first inlet 11 is fixedly connected to the surface of the reaction vessel 1. A feed pipe 12 is fixedly connected to the surface of the first inlet 11. A shut-off valve 13, a regulating valve 14, and a flow meter 15 are installed on the surface of the feed pipe 12. A second inlet 16 is fixedly connected to the surface of the reaction vessel 1. The feed pipe 12 is fixedly connected to the surfaces of the first inlet 11 and the second inlet 16. An outlet pipe 17 is fixedly connected to the surface of the reaction vessel 1. A nozzle 18 is provided at the bottom of the feed pipe 17, and a granulator 19 is provided on one side of the reaction vessel 1. Both the discharge pipe 17 and the nozzle 18 are located inside the granulator 19. Through the setting of the flow meter 15, the precise metering of urea sulfate and ammonia can be achieved, thereby ensuring the reaction effect of urea sulfate and ammonia. After being metered, urea sulfate and ammonia enter the reaction vessel 1, and a violent reaction will occur instantly, thereby generating a high-temperature ammonium urea sulfate slurry. Back pressure is generated to spray it through the nozzle 18 onto the solid material bed inside the granulator 19, thus facilitating the granulation of the ammonium urea sulfate slurry.

[0024] A mixing mechanism is provided inside the reaction vessel 1. The mixing mechanism includes a first rotating rod 2, which is movably connected to the inside of the reaction vessel 1. A first conical tooth 21 is fixedly connected to the bottom end of the first rotating rod 2. A motor 22 is fixedly installed at the top of the reaction vessel 1. A fixing block 23 is fixedly connected to the inner wall of the reaction vessel 1. A second rotating rod 24 is movably connected to the inner side of the fixing block 23. A second conical tooth 25 is fixedly connected to the surface of the second rotating rod 24. A stirring rod 26 is fixedly connected to the surface of the second rotating rod 24. By rotating the second rotating rod 24, the stirring rod 26 can be driven to rotate accordingly. The rotation of the stirring rod 26 can stir urea sulfate and ammonia, thereby achieving the mixing of the two and improving the reaction effect and efficiency of urea sulfate and ammonia.

[0025] Furthermore, the mixing mechanism also includes a connecting rod 27, which is fixedly connected to the surface of the second rotating rod 24. A scraper 28 is fixedly connected to the surface of the connecting rod 27. By setting the scraper 28, when the second rotating rod 24 rotates, the scraper 28 rotates accordingly and can scrape against the wall of the reaction vessel 1, which can avoid the residue of ammonium sulfate urea slurry on the inner wall of the reaction vessel 1, thereby reducing waste.

[0026] Furthermore, the end of the first rotating rod 2 away from the first conical tooth 21 is fixedly connected to the output end of the motor 22. The stirring rod 26 is evenly distributed in a ring array on the surface of the second rotating rod 24. The first rotating rod 2 drives the first conical tooth 21 to rotate, so that the second conical tooth 25 can rotate under the action of the first conical tooth 21 and can transmit power to the second rotating rod 24. This allows the second rotating rod 24 to drive the stirring rod 26 and the connecting rod 27 to rotate.

[0027] Furthermore, the connecting rods 27 are fixedly connected to the scraper 28 in four groups. The two ends of the connecting rods 27 are fixed to the second rotating rod 24 and the scraper 28 respectively. The connecting rods 27 connect the second rotating rod 24 and the scraper 28, so that when the second rotating rod 24 rotates, the connecting rods 27 can drive the scraper 28 to rotate accordingly, thereby enabling the scraper 28 to scrape the wall of the reaction vessel 1.

[0028] Furthermore, a feeding mechanism is provided inside the first feed inlet 11. The feeding mechanism also includes a movable plate 3, which is movably connected to the inside of the first feed inlet 11. A fixed rod 31 is fixedly connected to the inner wall of the first feed inlet 11. A connecting block 32 is movably connected to the surface of the fixed rod 31. A movable rod 33 is movably connected to the surface of the connecting block 32. A spring 34 is fixedly connected to the surface of the connecting block 32. By setting the movable plate 3, the falling speed of urea sulfate can be slowed down, thereby ensuring that urea sulfate and ammonia can have more sufficient contact and reaction time in the reaction vessel 1.

[0029] Furthermore, the movable plate 3 is movably connected to the first feed port 11 via a rotating shaft, and the two ends of the movable rod 33 are movably connected to the first feed port 11 and the movable plate 3 via rotating shafts, respectively. The two ends of the spring 34 are fixedly connected to the fixed rod 31 and the connecting block 32, respectively. With the setting of the spring 34, the movable plate 3 can move when it is impacted by urea sulfate, thereby reducing the impact of urea sulfate falling on the movable plate 3 and helping to protect the movable plate 3.

[0030] Working principle: During use, the motor 22 is electrically connected to an external power source. The operator starts the motor 22 by pressing the switch. The motor 22 drives the first rotating rod 2 to rotate. The first conical tooth 21 will rotate under the action of the first rotating rod 2. Then, the second conical tooth 25 will rotate under the action of the first conical tooth 21 and drive the second rotating rod 24 to rotate. Thus, the stirring rod 26 and the scraper 28 will rotate under the action of the second rotating rod 24. The rotation of the stirring rod 26 can stir the urea sulfate and ammonia in the reaction vessel 1, so that the two can be better mixed and reacted. The rotation of the scraper 28 can prevent urea sulfate from accumulating on the inner wall of the reaction vessel 1, which facilitates better mixing and reaction of urea sulfate and ammonia.

[0031] When urea sulfate enters the first feed inlet 11, it falls onto the movable plate 3. The movable plate 3, under the influence of the urea sulfate, moves via the rotating shaft, causing the movable rod 33 to move accordingly. This causes the connecting block 32 to move on the surface of the fixed rod 31. At this time, the spring 34 deforms, which slows down the falling speed of the urea sulfate, allowing for a more complete reaction and contact time between the urea sulfate and ammonia.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A tubular reactor for urea sulfate and ammonia, comprising a body, the body including a reaction vessel (1), a first inlet (11) fixedly connected to the surface of the reaction vessel (1), a feed pipe (12) fixedly connected to the surface of the first inlet (11), a shut-off valve (13) installed on the surface of the feed pipe (12), a regulating valve (14) installed on the surface of the feed pipe (12), and a flow meter (15) installed on the surface of the feed pipe (12). A second feed port (16) is fixedly connected to the surface of the container (1), and the feed pipe (12) is fixedly connected to the surface of the first feed port (11) and the second feed port (16). A discharge pipe (17) is fixedly connected to the surface of the reaction container (1), and a nozzle (18) is provided at the bottom end of the discharge pipe (17). A granulator (19) is provided on one side of the reaction container (1), and the discharge pipe (17) and the nozzle (18) are both located inside the granulator (19). Its features are, The reaction vessel (1) is provided with a mixing mechanism inside. The mixing mechanism includes a first rotating rod (2), which is movably connected to the inside of the reaction vessel (1). The bottom end of the first rotating rod (2) is fixedly connected with a first conical tooth (21). The top end of the reaction vessel (1) is fixedly installed with a motor (22). The inner wall of the reaction vessel (1) is fixedly connected with a fixing block (23). The inner side of the fixing block (23) is movably connected with a second rotating rod (24). The surface of the second rotating rod (24) is fixedly connected with a second conical tooth (25). The surface of the second rotating rod (24) is fixedly connected with a stirring rod (26).

2. The tubular reactor for urea sulfate and ammonia according to claim 1, characterized in that: The mixing mechanism also includes a connecting rod (27), which is fixedly connected to the surface of the second rotating rod (24), and a scraper (28) is fixedly connected to the surface of the connecting rod (27).

3. The tubular reactor for urea sulfate and ammonia according to claim 1, characterized in that: The end of the first rotating rod (2) away from the first conical tooth (21) is fixedly connected to the output end of the motor (22), and the stirring rod (26) is evenly distributed in a ring array on the surface of the second rotating rod (24).

4. A tubular reactor for urea sulfate and ammonia according to claim 2, characterized in that: The connecting rods (27) are in four groups and fixedly connected to the scraper (28). The two ends of the connecting rods (27) are respectively fixed to the second rotating rod (24) and the scraper (28).

5. A tubular reactor for urea sulfate and ammonia according to claim 1, characterized in that: A feeding mechanism is provided on the inner side of the first feed port (11). The feeding mechanism also includes a movable plate (3). The movable plate (3) is movably connected to the inner side of the first feed port (11). A fixed rod (31) is fixedly connected to the inner wall of the first feed port (11). A connecting block (32) is movably connected to the surface of the fixed rod (31). A movable rod (33) is movably connected to the surface of the connecting block (32). A spring (34) is fixedly connected to the surface of the connecting block (32).

6. A tubular reactor for urea sulfate and ammonia according to claim 5, characterized in that: The movable plate (3) is movably connected to the first feed port (11) via a rotating shaft. The two ends of the movable rod (33) are movably connected to the first feed port (11) and the movable plate (3) via rotating shafts, respectively. The two ends of the spring (34) are fixedly connected to the fixed rod (31) and the connecting block (32), respectively.

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