Safe and environment-friendly storage and transportation device suitable for phosphorus pentasulfide

Abstract

The safe and environment-friendly storage and transportation device comprises a storage box, the upper portion of the storage box is provided with an air inlet and a feeding port, the bottom of the storage box is provided with a discharging port, the air inlet is provided with a quick connector, and one end of the quick connector is connected with a breather pipe. The nitrogen inlet is arranged in the storage box and used for introducing inert gas into the storage box to form inert gas protection in the storage box, a rotary valve is arranged at the feed port, a connecting pipe is arranged at the feed end of the rotary valve, a sealing cover is arranged at the upper end of the connecting pipe, and an exhaust valve is arranged at the upper part of the storage box. A dynamic inert gas protection layer is formed to isolate outside moisture and oxygen, the hydrolysis reaction of phosphorus pentasulfide is remarkably inhibited, corrosive phosphoric acid and highly toxic hydrogen sulfide gas are prevented from being generated, the caused explosion risk is avoided, and transportation safety and stable chemical properties of materials are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of phosphorus pentasulfide storage and transportation technology, specifically to a safe and environmentally friendly storage and transportation device suitable for phosphorus pentasulfide. Background Technology

[0002] Phosphorus pentasulfide (P2S5) is an important chemical raw material widely used in pesticide synthesis, lubricant additives, and the preparation of organosulfur compounds. However, this compound is highly hygroscopic, and its powdered form is prone to hydrolysis when exposed to water or humid air, producing highly corrosive phosphoric acid (H3PO4) and highly toxic and flammable hydrogen sulfide (H2S) gas. This characteristic poses serious safety hazards during the storage and transportation of phosphorus pentasulfide, especially during long-distance cross-border transportation through regions with drastic temperature and humidity fluctuations, which further exacerbates the risk of hydrolysis.

[0003] In the prior art, for long-distance transportation, phosphorus pentasulfide is usually packaged in iron or high-density polyethylene plastic drums, utilizing the sealing and waterproof properties of the container body to isolate it from external environmental humidity.

[0004] However, the existing filling process has significant drawbacks: during the material filling process, water vapor in the ambient air inevitably enters the container along with the powder material. Due to the high porosity between phosphorus pentasulfide powder particles, the residual moisture undergoes a progressive hydrolysis reaction with the material in the sealed space, which can lead to the loss of effective ingredients and reduce the quality of the final product. Furthermore, the continuous accumulation of hydrogen sulfide gas in the sealed container poses an explosion risk. Utility Model Content

[0005] In view of this, the present invention provides a safe and environmentally friendly storage and transportation device for phosphorus pentasulfide. Nitrogen gas can be introduced through the air inlet to replace the air in the storage tank, forming a dynamic inert gas protective layer that isolates external moisture and oxygen, significantly inhibits the hydrolysis reaction of phosphorus pentasulfide, avoids the generation of corrosive phosphoric acid and highly toxic hydrogen sulfide gas, avoids the risk of explosion, and ensures transportation safety and the stability of the chemical properties of the material.

[0006] To solve the above-mentioned technical problems, this utility model provides a safe and environmentally friendly storage and transportation device for phosphorus pentasulfide, including a storage box. The upper part of the storage box is set as a rectangular structure, the lower part of the storage box is set as a bucket structure, the upper two sides of the storage box are respectively provided with an air inlet and a material inlet, and the bottom of the storage box is provided with a material outlet.

[0007] A quick-connector is connected to the air inlet via a flange. The quick-connector is a double-stop quick-connector, which automatically seals both ends of the air inlet and the air pipe when the vent pipe is disconnected, improving leak-proof performance. One end of the quick-connector is connected to the vent pipe via a clamp. The vent pipe is used to introduce nitrogen into the storage tank to form an inert gas protection environment. Using nitrogen can save costs and also allows the introduced nitrogen to expel the original air in the storage tank, preventing the original air in the storage tank from undergoing a hydrolysis reaction with phosphorus pentasulfide.

[0008] A rotary valve is bolted to the feed inlet to control the material entering the storage tank and prevent backflow of material due to positive pressure inside the storage tank. A connecting pipe is connected to the feed end of the rotary valve via a flange, and a sealing cap is connected to the upper end of the connecting pipe via a flange. When it is necessary to add material to the storage tank, the sealing cap is removed, the feed pipe is connected to the connecting pipe via a flange, and phosphorus pentasulfide is added to the storage tank.

[0009] The rotary valve includes a valve body and a rotating vane. A sealing ring is provided between the rotating vane and the inner wall of the valve body. The sealing ring is made of fluororubber and is embedded in the annular groove on the inner wall of the valve body. It is axially pressed by a retaining ring or pressure plate to prevent it from falling off. The sealing ring is provided to prevent the rotary valve from flowing with the outside air when it is closed, thus preventing positive pressure gas leakage.

[0010] An exhaust valve is installed at the top of the storage tank, which is connected to the storage tank and is connected to the top of the storage tank via a flange. It is used to discharge air and excess nitrogen.

[0011] The upper part of the exhaust valve is equipped with a dust filtration mechanism. The dust filtration mechanism is used to intercept material dust and prevent dust from escaping with the gas and polluting the environment. The dust filtration mechanism is set as a multi-layer fiber filter structure. The pore size of the multi-layer fiber filter is smaller than the particle size of phosphorus pentasulfide dust, so as to achieve efficient interception of phosphorus pentasulfide dust.

[0012] The discharge port of the storage tank is connected to a discharge valve via a flange. The discharge valve is a pneumatic plate valve that can be driven by compressed air. It can control the speed of phosphorus pentasulfide discharge to prevent excessive discharge speed from causing it to escape and be blown up, and further reduce the hydrolysis reaction with air.

[0013] Angle steel is vertically connected to the four right-angled sides of the storage box. The storage box is fixedly connected to the angle steel. The lower ends of the four angle steels are fixedly connected to the upper part of the support frame. A reinforcing tube is horizontally connected between every two adjacent angle steels. Both ends of each reinforcing tube are bolted to the angle steel.

[0014] The support frame has a fixed groove through both vertical surfaces. The cross-section of the fixed groove is set as a rectangular structure, which is used to connect with transportation equipment (such as forklift forks) or fixed brackets (such as placing it on a bracket with support rods) to improve the convenience of transportation. When loading, the storage box can be lifted by quickly inserting the forks of the forklift into the fixed groove.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. Inert gas protection inhibits hydrolysis reaction and enhances safety: Nitrogen gas is introduced through the air inlet to create an inert environment in the storage tank, effectively replacing the original air and preventing phosphorus pentasulfide from hydrolyzing with air or moisture. This reduces the generation of highly toxic and flammable hydrogen sulfide gas and highly corrosive phosphoric acid, lowering the risk of explosion and equipment corrosion during storage and transportation, and ensuring personnel and environmental safety.

[0017] 2. Multiple sealing and anti-backflow design: The double-stop quick connector automatically seals both ends when the vent pipe is disconnected to prevent nitrogen leakage and intrusion of external air or moisture. The rotary valve is tightly fitted with the valve body through a fluororubber sealing ring, which completely isolates the outside air when closed, avoiding material backflow caused by positive pressure in the storage tank and ensuring airtightness during transportation.

[0018] 3. Highly efficient dust interception and improved environmental friendliness: The exhaust valve is equipped with a multi-layer fiber filter with a pore size smaller than that of phosphorus pentasulfide dust particles, which can intercept more than 99% of the drifting dust, avoiding environmental pollution and the risk of flammable dust explosions. At the same time, it reduces material loss and improves economic efficiency.

[0019] 4. Optimized Structural Stability and Transportation Convenience: The storage box adopts a combination of angle steel frame and reinforcing tubes for support, significantly improving overall rigidity and adapting to vibrations and impacts during long-distance transportation. Standardized fixing slots are opened on both sides of the support frame to accommodate forklift forks and fixed brackets, enabling rapid loading, unloading, and stacking, and reducing logistics costs.

[0020] 5. Controllable unloading and enhanced operational safety: The pneumatic plate unloading valve precisely controls the unloading speed by adjusting the compressed air pressure, avoiding material dust and contact with air, further inhibiting hydrolysis reaction. Combined with full-process inert gas protection, closed-loop protection is achieved from filling, storage and transportation to unloading.

[0021] 6. Pressure balance and safety assurance: The exhaust valve can release air and excess nitrogen from the storage tank to prevent excessive internal pressure from causing safety hazards. Combined with inert gas protection, it forms a stable micro-positive pressure environment, further inhibiting the intrusion of external air and moisture and the hydrolysis of materials. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is another overall structural schematic diagram of the present invention;

[0024] Figure 3 This is a top view of a partial component of this utility model.

[0025] Figure 4 This is a schematic diagram of the support frame and its components of the present invention.

[0026] In the diagram: 101, storage tank; 102, air inlet; 103, feed inlet; 104, quick connector; 105, vent pipe; 106, rotary valve; 107, connecting pipe; 108, sealing cap; 109, exhaust valve; 110, feed guide pipe;

[0027] 201. Discharge valve;

[0028] 301. Angle steel; 302. Support frame;

[0029] 401. Reinforced pipe;

[0030] 501. Fixing groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0032] A safe and environmentally friendly storage and transportation device suitable for phosphorus pentasulfide, such as Figure 1 , 3As shown: The system includes a storage tank 101, allowing phosphorus pentasulfide to be stored within it, preventing contact with external air or moisture during transportation and further preventing hydrolysis. The inner wall of the storage tank 101 is coated with an anti-corrosion coating to prevent phosphorus pentasulfide from corroding the inner wall, extending the service life of the storage tank 101. The storage tank 101 is made of aluminum, whose low density reduces weight during transportation, decreasing energy consumption and costs. Furthermore, aluminum readily forms an aluminum oxide protective film on its surface, reducing its resistance to atmospheric moisture and oxygen. This, combined with the inner wall coating... The anti-corrosion coating forms a double protection, extending the service life of the storage box. The upper part of the storage box 101 is set as a rectangular structure, which can be stored against the factory wall before transportation or after transportation to the purchaser, reducing space waste. It is especially suitable for sites with limited space and is easy to stack horizontally or vertically. The lower part of the storage box 101 is set as a bucket structure, that is, the lower part of the storage box 101 is set as an inverted cone structure, which is used to guide phosphorus pentasulfide to concentrate at the discharge port, so that phosphorus pentasulfide can be discharged easily when the material needs to be discharged. The upper two sides of the storage box 101 are respectively opened with air inlet 102 and feed inlet 103, and the bottom of the storage box 101 is opened with discharge port.

[0033] like Figure 1 , 2 As shown: A quick connector 104 is connected to the air inlet 102 via a flange. The quick connector 104 is a double-stop quick connector. When the air inlet 102 is disconnected from the vent pipe 105, the double-stop quick connector can automatically seal both ends of the air inlet 102 and the vent pipe 105, improving the anti-leakage performance. After nitrogen is filled into the storage tank 101 through the vent pipe 105 and the quick connector 104, the vent pipe 105 needs to be disconnected for subsequent transportation. The double-stop quick connector has a built-in spring stop valve in both the male and female connectors, which automatically seals both ends of the pipe when disconnected, and there is zero leakage at the moment of insertion and removal. It is suitable for frequent disassembly scenarios in this device.

[0034] One end of the quick connector 104 is connected to a vent pipe 105 via a clamp. The vent pipe 105 is used to introduce nitrogen into the storage tank 101 to form an inert gas protection within the storage tank 101. Using nitrogen saves costs and also allows the introduced nitrogen to expel the original air in the storage tank 101, preventing the original air in the storage tank 101 from undergoing a hydrolysis reaction with phosphorus pentasulfide. In use, the vent pipe 105 is connected to one end of the quick connector 104 via a clamp, and the other end of the vent pipe 105 is connected to the outlet of the inert gas storage tank. Opening the valve of the inert gas storage tank allows inert gas to be introduced into the storage tank 101. When not in use, the valve of the inert gas storage tank is closed to stop the flow of inert gas, and then the quick connector 104 is disconnected. The self-sealing function maintains a seal, thus ensuring a tight seal.

[0035] like Figure 1 , 2 As shown: A rotary valve 106 is bolted to the feed inlet 103. The rotary valve 106 controls the material to enter the storage tank 101 by rotating its blades. The blades of the rotary valve 106 can prevent the material from flowing back into the storage tank 101 due to positive pressure. Backflow may carry moisture from the air into the storage tank 101, causing the phosphorus pentasulfide in the storage tank 101 to undergo a hydrolysis reaction.

[0036] A connecting pipe 107 is connected to the feed end of the rotary valve 106 via a flange. The connecting pipe 107 is used to connect the sealing cap 108 and the guide pipe 110. The upper end of the connecting pipe 107 is connected to the sealing cap 108 via a flange. The sealing cap 108 is used to cover one end of the connecting pipe 107 after the material is introduced, which further improves the sealing performance during storage and transportation and prevents humid air or moisture from entering the storage tank 101 through the rotary valve 106 from the connecting pipe 107. When it is necessary to add material to the storage tank 101, the sealing cap 108 is removed and the guide pipe 110 is connected to the connecting pipe 107 via a flange. Phosphorus pentasulfide material can then be added to the storage tank 101. Therefore, the corresponding working mode can be switched according to different usage conditions.

[0037] The rotary valve 106 includes a valve body and a rotating vane. A sealing ring is provided between the rotating vane and the inner wall of the valve body. The sealing ring is made of fluororubber and is embedded in the annular groove of the inner wall of the valve body. It is axially pressed by a retaining ring or a pressure plate to prevent it from falling off. The sealing ring is provided to prevent the rotary valve 106 from flowing with the outside air when it is closed, thus preventing positive pressure gas leakage.

[0038] like Figure 2 As shown: An exhaust valve 109 is installed at the upper axis of the storage tank 101. The exhaust valve 109 is connected to the storage tank 101 and is connected to the upper part of the storage tank 101 through a flange. It is used to exhaust air and excess nitrogen. Before adding phosphorus pentasulfide, there will still be air in the storage tank 101. Therefore, the air in the storage tank 101 needs to be exhausted before adding phosphorus pentasulfide to avoid hydrolysis reaction with phosphorus pentasulfide. The exhaust valve 109 can exhaust the air in the storage tank 101 when nitrogen is filled. When adding phosphorus pentasulfide, excess nitrogen will also be discharged through the exhaust valve 109 to prevent the gas pressure in the storage tank 101 from being too high and causing an explosion.

[0039] The upper part of the exhaust valve 109 is equipped with a dust filtration mechanism. The dust filtration mechanism is used to intercept material dust and prevent phosphorus pentasulfide dust from escaping with the exhaust gas (such as air, nitrogen, etc.) and polluting the environment. The dust filtration mechanism is set as a multi-layer fiber filter structure. Alternatively, a small filter cartridge can be directly installed on the upper part of the exhaust valve 109. The multi-layer fiber filter is connected to the upper part of the exhaust valve 109 in a cylindrical form.

[0040] The multi-layer fiber filter is encased in a shell to prevent it from detaching due to airflow from exhaust. The shell has multiple vents to allow gas to escape. The pore size of the multi-layer fiber filter is smaller than the particle size of phosphorus pentasulfide dust, achieving highly efficient interception of the dust. Even if phosphorus pentasulfide dust is discharged with the airflow, it will be blocked by the multi-layer fiber filter, further preventing it from escaping into the air. Therefore, it prevents dust from entering valves and other equipment, reducing mechanical wear and extending equipment lifespan. Furthermore, since phosphorus pentasulfide dust is flammable, this design prevents explosions caused by excessively high concentrations of dust suspended in the air.

[0041] like Figure 1 , 4 As shown: The discharge port of storage tank 101 is connected to a discharge valve 201 via a flange. The discharge valve 201 is a pneumatic plate valve that can be driven by compressed air. It can control the speed of phosphorus pentasulfide discharge to avoid excessive discharge speed causing dispersion and dusting, and further reduce hydrolysis reaction with air.

[0042] like Figure 2 , 4 As shown: Angle steel 301 is vertically connected to the four right-angled sides of the storage box 101. Using angle steel 301 can reduce production costs and support the storage box 101 with the included angle of the inner sidewall of the angle steel 301. The storage box 101 is fixedly connected to the inner sidewall of the angle steel 301. The lower ends of the four angle steels 301 are fixedly connected to the upper part of the support frame 302. The support frame 302 is set so that the storage box 101 can be placed on the ground and supported. Furthermore, it allows phosphorus pentasulfide to be stored in the storage box 101 and placed on the ground.

[0043] A reinforcing tube 401 is horizontally connected between every two adjacent angle steels 301. Both ends of each reinforcing tube 401 are bolted to the angle steel 301. The reinforcing tube 401 can improve the support strength of every two angle steels 301, and further improve the stability of the storage box 101 and the phosphorus pentasulfide support inside the storage box 101.

[0044] The support frame 302 has a fixed groove 501 through it on both vertical surfaces. The cross-section of the fixed groove 501 is set as a rectangular structure to fit the transportation equipment (such as the forks of a forklift) or the fixed bracket (such as placing it on a bracket with a support rod), which improves the convenience of transportation. When loading, the storage box 101 can be lifted by quickly inserting the forks of the forklift into the fixed groove 501. This makes it easy to insert the support frame 302 through the fixed groove 501 when loading. When it is necessary to unload phosphorus pentasulfide, the support frame 302 can be placed on the bracket, and the unloading valve 201 can be opened to discharge phosphorus pentasulfide, thereby improving the efficiency of loading and unloading.

[0045] In use, first connect the vent pipe 105 to the inert gas storage tank, connect the connecting pipe 107 to the feed pipe 110, and connect the feed pipe 110 to the phosphorus pentasulfide silo. At this time, the discharge valve 201 is in the closed state. Open the inert gas storage tank to allow nitrogen to enter the storage box 101, and squeeze out the air in the storage box 101 through the exhaust valve 109.

[0046] After the air in the storage tank 101 is squeezed out, the feed pipe 110 is connected to the connecting pipe 107, and the rotary valve 106 is opened to make the rotating blades on the rotary valve 106 rotate. At this time, phosphorus pentasulfide will be continuously added into the storage tank 101. During the addition process, excess nitrogen will be discharged from the exhaust valve 109. Therefore, the storage tank 101 is filled with nitrogen and phosphorus pentasulfide to form a positive pressure, preventing humid air or moisture from entering the storage tank 101 and preventing the hydrolysis reaction of phosphorus pentasulfide.

[0047] After adding phosphorus pentasulfide, adjust the rotating blades of the rotary valve 106 to the appropriate position (manually adjust the rotating rod on the rotary valve 106 so that two of the rotating blades press against the sealing ring to keep the rotary valve 106 sealed). Then remove the feed pipe 110 and connect the sealing cover 108 to the connecting pipe 107 through the flange. Then close the valve of the inert gas storage tank to stop the flow of inert gas, and then disconnect the quick connector 104 to maintain the seal using its self-sealing function.

[0048] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A safe and environmentally friendly storage and transportation device for phosphorus pentasulfide, characterized in that: It includes a storage box (101), the upper part of which is provided with an air inlet (102) and a feed inlet (103), and the bottom of which is provided with a discharge outlet; A quick connector (104) is provided at the air inlet (102), and one end of the quick connector (104) is connected to a vent pipe (105) for introducing inert gas into the storage tank (101) to form inert gas protection in the storage tank (101). A rotary valve (106) is provided at the feed inlet (103) to control the material entering the storage tank (101) and prevent the material from flowing back due to positive pressure in the storage tank (101). A connecting pipe (107) is provided at the feed end of the rotary valve (106), and a sealing cap (108) is provided at the upper end of the connecting pipe (107). The storage tank (101) is equipped with an exhaust valve (109) on the upper part for discharging air and excess inert gas.

2. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 1, characterized in that: The quick connector (104) is configured as a double-stop quick connector. When the vent pipe (105) is disconnected from the air inlet (102), the double-stop quick connector can automatically seal both ends of the air inlet (102) and the vent pipe (105) to improve the leak prevention performance.

3. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 1, characterized in that: The exhaust valve (109) is equipped with a dust filtration mechanism on its upper part. The dust filtration mechanism is used to trap material dust and prevent dust from escaping with the gas and polluting the environment.

4. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 3, characterized in that: The dust filtration mechanism is configured as a multi-layer fiber filter structure, and the pore size of the multi-layer fiber filter is smaller than the particle size of phosphorus pentasulfide dust particles.

5. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 1, characterized in that: The storage tank (101) is equipped with a discharge valve (201) at the discharge port, which is used to open the discharge valve (201) to discharge the material when it is used.

6. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 1, characterized in that: The upper part of the storage box (101) is set as a rectangular structure, and angle steel (301) is vertically connected to the four right-angled sides of the storage box (101). The lower ends of the four angle steels (301) are all connected to the support frame (302).

7. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 6, characterized in that: A reinforcing tube (401) is horizontally arranged between every two adjacent angle steels (301), and both ends of each reinforcing tube (401) are bolted to the angle steel (301).

8. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 6, characterized in that: The support frame (302) has a fixing groove (501) through it on both vertical surfaces for connecting with transportation equipment or fixed brackets to improve the convenience of transportation.

9. The safe and environmentally friendly storage and transportation device for phosphorus pentasulfide as described in claim 1, characterized in that: The rotary valve (106) includes a valve body and a rotating vane. A sealing ring is provided between the rotating vane and the inner wall of the valve body to prevent airflow with the outside when the rotary valve (106) is closed, thereby preventing positive pressure gas leakage.

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