A high-mixing-efficiency aluminum phosphide tablet reaction vessel

Abstract

The utility model belongs to phosphor bronze production technical field, concretely relates to a kind of phosphor bronze tablet reaction container of high mixing efficiency, including reaction tank, feeding mechanism, material bucket, the tank top of reaction tank is connected exhaust valve and mixing pipe, exhaust valve is connected exhaust pipeline and material bucket by three-way pipe, the both ends of feeding mechanism are connected nitrogen pipeline and mixing pipe respectively, the throat of venturi in feeding mechanism is connected lower three-way pipe by material extraction pipe, lower three-way pipe bottom end blind dead and top end intercommunication guide slot, guide slot top is connected material bucket bucket mouth by sanitary clamp, the variable diameter section part of material bucket is threadedly connected bucket cover, unscrambling cover subassembly is rotatably installed on lower three-way pipe, unscrambling cover subassembly transmission connection bucket cover. Through the cooperation of positive pressure nitrogen and venturi structure, safe negative pressure mixing feeding in the sealing system formed by reaction tank, feeding mechanism and material bucket is realized, and the safety of feeding and the uniformity of mixing are effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum phosphide production technology, specifically relating to a reaction vessel for aluminum phosphide tablets with high mixing efficiency. Background Technology

[0002] Aluminum phosphide tablets, as a highly efficient fumigant, are widely used in grain storage, quarantine and epidemic prevention, and other fields. The mixing and reaction of yellow phosphorus and aluminum powder is a core step in its production process, directly affecting the purity and safety of the product. Traditional mixing and reaction equipment has the following problems:

[0003] In terms of safety, existing equipment's feeding systems are mostly open or semi-open structures. Yellow phosphorus is highly toxic, has a low auto-ignition point, and aluminum powder is easily flammable and oxidizable, generating dust during transfer (dust concentration can reach 5-10 mg / m³). Inhalation by operators poses a risk of poisoning (phosphine poisoning threshold is 0.3 ppm). Furthermore, the dust mixed with air can easily form an explosive mixture (explosion limits 1.4%-4.5%). Simultaneously, traditional feeding methods rely on manual dumping or screw conveyors, resulting in poor equipment sealing and easy leakage of the generated phosphine gas (highly toxic and flammable) (leakage rate > 5%), leading to excessive concentrations in the workshop environment.

[0004] Furthermore, insufficient uniformity of mixing severely restricts product quality. Existing equipment mostly uses single-tank stirring and mixing. The large density difference between yellow phosphorus and aluminum powder (yellow phosphorus density 1.82 g / cm³, aluminum powder 2.7 g / cm³) easily leads to stratification, resulting in incomplete reaction. This not only reduces the content of effective ingredients in the product, but also causes overheating due to violent local reactions, potentially leading to spontaneous combustion of yellow phosphorus or decomposition and explosion of phosphine. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a high-efficiency aluminum phosphide tablet reaction vessel, solving the problems of poor safety of the feeding system and insufficient mixing uniformity in traditional aluminum phosphide tablet reaction equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency aluminum phosphide tablet reaction vessel, comprising a reaction tank, a feeding mechanism, and a material tank. The top of the reaction tank is connected to an exhaust valve and one end of a mixing pipe. The exhaust valve is connected to one end of a three-way pipe, and the other two ends of the three-way pipe are respectively connected to an exhaust pipeline and a material tank. The feeding mechanism includes a nitrogen valve, the two ends of which are respectively connected to a nitrogen pipeline and one end of a three-way pipe. The other two ends of the three-way pipe are each connected to a... One end of a venturi tube is connected to both ends of a second tee tube, and the other end of the second tee tube is connected to a mixing pipe. The throat of the venturi tube is connected to one end of a lower tee tube through a suction pipe. The bottom end of the lower tee tube is closed, while the top end is connected to the bottom of a guide trough. The top of the guide trough is connected to the mouth of a material bucket through a sanitary clamp. The material bucket has a diameter reducing section formed on it, and a bucket lid is threadedly connected to the diameter reducing section. A lid removal assembly is rotatably installed on the lower tee tube, and the lid removal assembly is driven by the bucket lid.

[0007] The beneficial effects of this utility model are as follows: by combining positive pressure nitrogen gas with the Venturi tube structure, safe negative pressure mixing and feeding is achieved in the sealed system consisting of the reaction vessel, feeding mechanism, and material tank, which effectively improves the safety of feeding and the uniformity of mixing; by rotating the cap removal assembly to remove the tank cover, the feeding mechanism and material tank are connected, which further improves the quality and safety of feeding.

[0008] For easy connection of the T-joint pipe and the material bucket;

[0009] As a further improvement to the above technical solution: two pagoda heads are fixed at one end of the three-way pipe, the pagoda heads are inserted into one end of the connecting hose, and the other end of the hose is connected to the air inlet valve, which is fixed on the side of the bottom of the material barrel.

[0010] The beneficial effects of this improvement are: the hose can easily connect the material bucket and the T-connector, eliminating the need for personnel to carefully adjust the installation angle of the material bucket on the guide trough, and the hose can allow nitrogen to flow stably between the T-connector and the material bucket, so as to stably replenish the pressure inside the material bucket during the process of the feeding mechanism drawing material from the material bucket.

[0011] In order to effectively rotate the bucket lid and disengage it from the variable diameter section by using the lid removal assembly;

[0012] As a further improvement to the above technical solution: the variable diameter section is a circular tube variable diameter structure with a middle section and suction at both ends, and the middle part of the variable diameter section is provided with an internal thread structure for threaded connection of the bucket lid. A bracket is fixed on the inner side of the bucket lid, and a nut is fixed on the bracket. The lid removal assembly includes a rotating rod, which is rotatably installed on the lower tee pipe and a dynamic sealing structure is provided between the rotating rod and the lower tee pipe. A hexagonal prism is fixed at the top of the rotating rod, and the hexagonal prism is slidably inserted into the nut.

[0013] The beneficial effects of this improvement are as follows: Operators can first load yellow phosphorus powder and aluminum powder into two material buckets in a safe environment, and then screw on the bucket lids to seal them. Then, the material buckets are inverted and fixed to the guide chute by sanitary clamps. At this time, the top of the hexagonal prism is inserted into the nut. As the lid removal assembly rotates, the lid moves downward and separates from the material bucket, thereby achieving safe connection between the feeding mechanism and the material bucket for feeding in an isolated and sealed environment.

[0014] To save effort, rotate the lever;

[0015] As a further improvement to the above technical solution: a handwheel is connected to the bottom end of the rotating rod.

[0016] The beneficial effect of this improvement is that the operator can turn the rotating lever with less effort by using the handwheel.

[0017] To ensure that the material in the material bucket falls completely into the guide chute;

[0018] As a further improvement to the above technical solution: the lid is a conical lid structure, and the end of the lid is set towards the bottom of the material bucket.

[0019] The beneficial effect of this improvement is that the material in the material bucket can smoothly fall into the guide chute along the conical surface of the bucket lid.

[0020] In order to ensure that the material in the feed chute is completely discharged;

[0021] As a further improvement to the above technical solution: the guide groove is a conical groove structure that is wider at the top and narrower at the bottom.

[0022] The beneficial effect of this improvement is that the material can smoothly fall into the lower tee pipe along the conical inner wall of the guide chute to achieve feeding.

[0023] To prevent the falling bucket lid from sealing the feed chute and affecting the material conveying;

[0024] As a further improvement to the above technical solution: the side of the rotating rod is formed with a support plate, and when the top surface of the support plate contacts the bottom surface of the nut, the vertical distance between the bottom end of the bucket lid and the inner wall of the guide groove is not less than 1cm.

[0025] The beneficial effects of this improvement are: the rotating rod acts as a limit support for the barrel lid, maintaining a suitable height difference between the barrel lid and the guide chute, thereby allowing the material to be smoothly conveyed through the gap between the barrel lid and the guide chute.

[0026] To prevent materials in the reaction vessel from flowing back into the feeding mechanism during the reaction process;

[0027] As a further improvement to the above technical solution: a material extraction valve is installed between the two-way pipe and the venturi pipe.

[0028] The beneficial effects of this improvement are: after closing the extraction valve, the vaporized yellow phosphorus in the reaction tank can be effectively prevented from flowing back into the feeding mechanism, and the mixing ratio of yellow phosphorus and aluminum powder can be adjusted by adjusting the valve opening size of the two extraction valves.

[0029] In order to effectively mix yellow phosphorus and aluminum powder by using a mixing pipe;

[0030] As a further improvement to the above technical solution: multiple spiral blades are installed inside the mixing pipe along the axial direction of the mixing pipe, the spiral directions of adjacent spiral blades are opposite, and the ends of adjacent spiral blades are connected.

[0031] The beneficial effects of this improvement are as follows: during the high-speed flow of yellow phosphorus and aluminum powder in the mixing tube, they flow along the spiral surface of multiple spiral blades. Since the spiral directions of two adjacent spiral blades are opposite, the powder will repeatedly collide with the spiral blades under the action of inertia to generate eddies and effectively mix.

[0032] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the feeding mechanism in this utility model;

[0035] Figure 3 This is a cross-sectional view of the connection structure between the feeding mechanism and the material bucket in this utility model;

[0036] Figure 4 This is a cross-sectional view of the material container in this utility model;

[0037] Figure 5 This is a cross-sectional view of the mixing pipe in this utility model;

[0038] Figure 6 This is an enlarged view of A in this utility model;

[0039] In the diagram: 1. Reaction vessel; 2. Feeding mechanism; 20. Feed chute; 21. Nitrogen valve; 23. T-connector 1; 24. Venturi tube; 25. Extraction pipe; 26. Extraction valve; 27. T-connector 2; 28. Lid removal assembly; 281. Rotating rod; 282. Handwheel; 283. Hexagonal prism; 284. Support plate; 29. ​​Lower T-connector; 3. Material bucket; 31. Variable diameter section; 32. Support; 33. Nut; 34. Bucket lid; 4. Exhaust valve; 5. T-connector; 6. Hose; 7. Inlet valve; 8. Mixing pipe; 81. Spiral blade; 9. Sanitary clamp. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way. Example 1:

[0041] like Figure 1As shown in Figure 6: A high-efficiency aluminum phosphide tablet reaction vessel includes a reaction tank 1, a feeding mechanism 2, and a material tank 3. The top of the reaction tank 1 is connected to an exhaust valve 4 and one end of a mixing pipe 8. The exhaust valve 4 is connected to one end of a three-way pipe 5. The other two ends of the three-way pipe 5 are respectively connected to an exhaust pipeline and the material tank 3. The feeding mechanism 2 includes a nitrogen valve 21. The two ends of the nitrogen valve 21 are respectively connected to a nitrogen pipeline and one end of a three-way pipe 23. The other two ends of the three-way pipe 23 are each connected to one end of a Venturi tube 24. The Venturi tube 24 is connected to both ends of a two-way pipe 27. The other end of the two-way pipe 27 is connected to the mixing pipe 8. The throat of the Venturi tube 24 is connected to a lower three-way pipe 29 via a suction pipe 25. The bottom end of the lower tee pipe 29 is closed while the top end connects to the bottom of the guide trough 20. The top of the guide trough 20 is connected to the opening of the material bucket 3 via a sanitary clamp 9. The material bucket 3 has a diameter reducing section 31 formed on it, and the diameter reducing section 31 is threadedly connected to a bucket lid 34. A lid removal assembly 28 is rotatably installed on the lower tee pipe 29. The lid removal assembly 28 is connected to the bucket lid 34. Through the cooperation of positive pressure nitrogen and the Venturi tube structure, safe negative pressure mixing and feeding are achieved in the sealed system composed of the reaction tank 1, the feeding mechanism 2, and the material bucket 3, effectively improving the safety of feeding and the uniformity of mixing. By rotating the lid removal assembly 28 to remove the bucket lid 34, the feeding mechanism 2 and the material bucket 3 are connected, further improving the feeding quality and safety. The tee pipe Two pagoda heads are fixed at one end of the 5, and the pagoda heads are inserted into one end of the connecting hose 6. The other end of the hose 6 is connected to the air inlet valve 7, which is fixed on the side of the bottom of the material tank 3. The hose 6 can easily connect the material tank 3 and the three-way pipe 5 without the need for personnel to carefully adjust the installation angle of the material tank 3 on the guide trough 20. The hose 6 can also allow nitrogen to flow stably between the three-way pipe 5 and the material tank 3, so as to stably replenish the pressure inside the material tank 3 during the process of the feeding mechanism 2 sucking the material in the material tank 3. The variable diameter section 31 is a circular tube variable diameter structure with a middle group and suction at both ends. The middle part of the variable diameter section 31 has an internal thread structure for threaded connection to the tank cover 34. A bracket 32 ​​is fixed on the inner side of the tank cover 34. A bracket 32 ​​is fixed on the bracket 32. The cap-removing assembly 28 includes a nut 33 and a rotating rod 281. The rotating rod 281 is rotatably mounted on the lower tee pipe 29 and has a dynamic sealing structure between it and the lower tee pipe 29. A hexagonal prism 283 is fixed at the top of the rotating rod 281, and the hexagonal prism 283 is slidably inserted into the nut 33. In a safe environment, the operator can first load yellow phosphorus powder and aluminum powder into two material buckets 3 respectively, and then screw on the bucket caps 34 to seal them. Then, the material buckets 3 are inverted and fixed to the guide trough 20 by sanitary clamps 9. At this time, the top of the hexagonal prism 283 is inserted into the nut 33. As the cap-removing assembly 28 rotates, the bucket cap 34 moves downward and disengages from the material buckets 3, thereby achieving safe connection and feeding between the feeding mechanism 2 and the material buckets 3 in an isolated and sealed environment.The bottom end of the rotating rod 281 is connected to a handwheel 282, allowing the operator to rotate the rotating rod 281 effortlessly using the handwheel 282. The bucket lid 34 is a conical lid structure, with its end facing the bottom of the material bucket 3. Material inside the material bucket 3 can smoothly fall into the guide groove 20 along the conical surface of the lid 34. The guide groove 20 is a conical groove structure that is wider at the top and narrower at the bottom, allowing material to smoothly fall into the lower tee pipe 29 along the conical inner wall of the guide groove 20 for feeding. A support plate 284 is formed on the side of the rotating rod 281. When the top surface of the support plate 284 contacts the bottom surface of the nut 33, the vertical distance between the bottom end of the lid 34 and the inner wall of the guide groove 20 is not less than 1 cm. The rotating rod 281 serves to limit and support the lid 34, maintaining a suitable height difference between the lid 34 and the guide groove 20. This allows the material to be smoothly conveyed through the gap between the lid 34 and the guide trough 20. A suction valve 26 is installed between the three-way pipe 27 and the venturi pipe 24. Closing the suction valve 26 effectively prevents the vaporized yellow phosphorus in the reaction tank 1 from flowing back into the feeding mechanism 2. The mixing ratio of yellow phosphorus and aluminum powder can be adjusted by adjusting the valve opening size of the two suction valves 26. Multiple spiral blades 81 are installed inside the mixing pipe 8 along its axial direction. Adjacent spiral blades 81 rotate in opposite directions, and their ends are connected. During the high-speed flow of yellow phosphorus and aluminum powder within the mixing pipe 8, they flow along the spiral surfaces of the multiple spiral blades 81. Because the rotation directions of two adjacent spiral blades 81 are opposite, the powder repeatedly impacts the spiral blades 81 under inertia, generating vortices and effectively mixing.

[0042] The working principle of this technical solution is as follows: In a safe environment, such as a nitrogen-filled operating table, yellow phosphorus and aluminum powder are respectively loaded into two material buckets 3, and the bucket lids 34 are tightened to ensure a threaded seal between the reducing section 31 and the lid 34. The material buckets 3 are then inverted, and the bucket openings are sealed to the top of the guide trough 20 using sanitary clamps 9. At this time, the top of the hexagonal prism 283 of the lid removal assembly 28 is inserted into the nut 33 of the inner bracket 32 ​​of the lid 34. The operator turns the handwheel 282, which drives the rotating rod 281 to rotate. The hexagonal prism 283 drives the nut 33 to rotate synchronously, causing the lid 34 to move downwards along the internal thread of the reducing section 31 until the top surface of the support plate 284 contacts the bottom surface of the nut 33, thus achieving the connection between the material buckets 3 and the guide trough 20. The entire process is completed in a sealed state with no dust leakage. The nitrogen valve 21 is opened, and the nitrogen pressure is adjusted. The nitrogen is diverted through the three-way pipe 23 to the two Venturi tubes 24, providing high-pressure nitrogen. The gas generates negative pressure at the throat of the venturi tube 24, drawing the material—yellow phosphorus and aluminum powder—from the feed trough 20 into the venturi tube 24 through the feed pipe 25 and the lower three-way pipe 29. This mixture with nitrogen forms a gas-solid two-phase flow. Simultaneously, the inlet valve 7 is opened, and nitrogen is supplied to the material container 3 through the hose 6 and the three-way pipe 5 to balance the negative pressure inside the container and ensure smooth material flow. Two feed valves 26 are opened, and the valve opening is adjusted to control the material flow rate. The gas-solid two-phase flows of yellow phosphorus and aluminum powder converge at the second three-way pipe 27 and enter the mixing pipe 8. As the material flows through the internal spiral blades 81, the opposing rotation directions of adjacent spiral blades cause the material to repeatedly impact the spiral surface under inertia, generating eddies and achieving efficient mixing. The mixed material then enters the reaction tank 1 through the mixing pipe 8. During this process, the exhaust valve 4 is opened, and residual air and trace amounts of gas in the system are discharged through the three-way pipe 5. The exhaust pipe is connected to a filter and a waste gas treatment device.

[0043] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. An aluminum phosphide tablet reaction vessel with high mixing efficiency, characterized in that: The system includes a reaction tank (1), a feeding mechanism (2), and a material tank (3). The top of the reaction tank (1) is connected to an exhaust valve (4) and one end of a mixing pipe (8). The exhaust valve (4) is connected to one end of a three-way pipe (5). The other two ends of the three-way pipe (5) are connected to an exhaust pipeline and the material tank (3), respectively. The feeding mechanism (2) includes a nitrogen valve (21). The two ends of the nitrogen valve (21) are connected to a nitrogen pipeline and one end of a three-way pipe (23), respectively. The other two ends of the three-way pipe (23) are each connected to one end of a venturi tube (24). The venturi tube (24) is connected to the two ends of a two-way pipe (27). The other end of the three-way pipe (27) is connected to the mixing pipe (8). The throat of the venturi pipe (24) is connected to one end of the lower three-way pipe (29) through the extraction pipe (25). The bottom end of the lower three-way pipe (29) is closed and the top end is connected to the bottom of the guide trough (20). The top of the guide trough (20) is connected to the mouth of the material bucket (3) through the sanitary clamp (9). The material bucket (3) has a variable diameter section (31) formed on it. The variable diameter section (31) is threadedly connected to the bucket lid (34). The lower three-way pipe (29) is rotatably installed with a lid removal assembly (28). The lid removal assembly (28) is connected to the bucket lid (34) through a transmission.

2. The high-mixing-efficiency aluminum phosphide tablet reaction vessel of claim 1, wherein: Two pagoda heads are fixed at one end of the three-way pipe (5), and the pagoda heads are inserted into one end of the connecting hose (6). The other end of the hose (6) is connected to the air inlet valve (7), which is fixed on the side of the bottom of the material bucket (3).

3. The high efficiency mixing aluminum phosphide tablet reaction vessel of claim 1, wherein: The variable diameter section (31) is a circular tube with a middle section and suction at both ends. The middle part of the variable diameter section (31) is provided with an internal thread structure for connecting the barrel cover (34). The inner side of the barrel cover (34) is fixed with a bracket (32). The bracket (32) is fixed with a nut (33). The lid removal assembly (28) includes a rotating rod (281). The rotating rod (281) is rotatably installed on the lower tee pipe (29) and a dynamic sealing structure is provided between it and the lower tee pipe (29). The top end of the rotating rod (281) is fixed with a hexagonal prism (283). The hexagonal prism (283) is slidably inserted into the nut (33).

4. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 3, characterized in that: A handwheel (282) is connected to the bottom end of the rotating rod (281).

5. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 1, characterized in that: The lid (34) is a conical lid structure, and the end of the lid (34) is set towards the bottom of the material bucket (3).

6. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 1, characterized in that: The guide groove (20) is a conical groove structure that is wider at the top and narrower at the bottom.

7. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 3, characterized in that: The rotating rod (281) has a support plate (284) formed on its side. When the top surface of the support plate (284) contacts the bottom surface of the nut (33), the vertical distance between the bottom end of the bucket lid (34) and the inner wall of the guide groove (20) is not less than 1cm.

8. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 1, characterized in that: A material extraction valve (26) is installed between the two-way pipe (27) and the venturi pipe (24).

9. The aluminum phosphide tablet reaction vessel with high mixing efficiency according to claim 1, characterized in that: The mixing tube (8) has multiple spiral blades (81) installed inside along the axial direction of the mixing tube (8). The spiral directions of adjacent spiral blades (81) are opposite, and the ends of adjacent spiral blades (81) are connected.

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