Phosphorus pentasulfide feeding device

Abstract

The utility model discloses a phosphorus pentasulfide feeding device, belongs to the field of refined sulfuric acid, and particularly discloses the phosphorus pentasulfide feeding device which is characterized in that a first hopper, a second hopper, a third hopper, a first gate valve and a second gate valve are arranged, heated nitrogen is introduced into the first hopper, in the phosphorus pentasulfide feeding process, the nitrogen is introduced into the second hopper, and the nitrogen is introduced into the second hopper; and after the humidity and oxygen concentration in the first hopper, the second hopper and the third hopper meet the requirements, the materials are sequentially fed, so that in the whole process of feeding phosphorus pentasulfide, the phosphorus pentasulfide does not react with water vapor to generate toxic hydrogen sulfide, and the safety of the phosphorus pentasulfide feeding process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refined phosphoric acid, in particular to a phosphorus pentasulfide feeding device. Background Art

[0002] Wet phosphoric acid purification is an important direction for the development of phosphorus chemical industry, but the production process is complicated, especially the arsenic removal process has great safety hazards. The mainstream arsenic removal process mainly uses phosphorus pentasulfide as the arsenic removal agent. When phosphorus pentasulfide meets water, it will produce highly toxic gas hydrogen sulfide. The safety risk of the feeding process in the production process is high. Therefore, designing a device for safely conveying phosphorus pentasulfide is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0003] The purpose of the utility model is to provide a phosphorus pentasulfide feeding device, which realizes closed feeding, adds nitrogen protection through a three-stage hopper, and also adds a dehumidification device to effectively avoid safety risks and improve the safety in the process of conveying phosphorus pentasulfide.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A phosphorus pentasulfide feeding device comprises a first hopper, a second hopper, a third hopper, a first gate valve arranged between the first hopper and the second hopper, a second gate valve arranged between the second hopper and the third hopper, a nitrogen storage tank, a first air pipe connecting the nitrogen storage tank and the first hopper, and a carrier gas heater arranged on the first air pipe for heating nitrogen, wherein the air outlet end of the first air pipe extends into the first hopper.

[0006] In a possible implementation, the phosphorus pentasulfide feeding device further includes a motor, a rotating shaft, a butt joint, a rotary joint, a fixed sleeve, and a stirring air pipe;

[0007] The rotary joint comprises a fixed body and a swivel, the bottom of the swivel can rotate around the fixed body, the fixed sleeve is fixed to the end of the gas outlet end of the first gas pipe, the fixed body is fixedly connected to the fixed sleeve, the top of the swivel is fixedly connected to the bottom of the butt joint, and the gas inlet end of the stirring gas pipe is fixed to the outer wall of the butt joint;

[0008] The motor is installed on the top of the first hopper, one end of the rotating shaft is fixedly connected to the output end of the motor, and the other end of the rotating shaft is fixedly connected to the butt joint pipe;

[0009] The first air pipe, the fixed sleeve, the butt joint pipe and the stirring air pipe are connected in sequence.

[0010] In a possible implementation, the stirring air pipe is L-shaped, and the outlet of the stirring air pipe is arranged upward.

[0011] In a possible implementation, the number of the stirring air pipes is four, and they are evenly arranged on the periphery of the butt joint pipe.

[0012] In a possible implementation, the phosphorus pentasulfide feeding device further includes a control unit, a humidity sensor, and a nitrogen concentration sensor;

[0013] The sensing end of the humidity sensor and the sensing end of the nitrogen concentration sensor are both located in the first hopper, and the humidity sensor, the nitrogen concentration sensor, the first gate valve, and the second gate valve are all electrically connected to the control unit.

[0014] In a possible implementation, the phosphorus pentasulfide feeding device further includes a second air pipe and a rapper provided on the second air pipe;

[0015] One end of the second gas pipe is communicated with the carrier gas heater, and the other end of the second gas pipe extends into the second hopper.

[0016] In a possible implementation, the phosphorus pentasulfide feeding device further includes a third air pipe, one end of the third air pipe is connected to the carrier gas heater, and the other end of the third air pipe extends into the third hopper.

[0017] In a possible implementation, the phosphorus pentasulfide feeding device further includes a negative pressure air pipe and a negative pressure generator, one end of the negative pressure air pipe is connected to the negative pressure generator, and the other end of the negative pressure air pipe extends into the third hopper.

[0018] In a possible implementation, the phosphorus pentasulfide feeding device further includes a leg having one end fixed to the bottom of the third hopper and a weighing unit;

[0019] The supporting legs include an upper supporting leg and a lower supporting leg, the top of the upper supporting leg is fixed to the bottom of the third hopper, and the weighing unit is arranged between the upper supporting leg and the lower supporting leg.

[0020] In a possible implementation, the phosphorus pentasulfide feeding device further includes an auger, and the auger is connected to the bottom of the third hopper.

[0021] Compared with the prior art, the phosphorus pentasulfide feeding device of the utility model has the following beneficial effects:

[0022] In the utility model, by setting the first hopper, the second hopper, the third hopper, the first gate valve and the second gate valve, and introducing heated nitrogen into the first hopper, during the process of adding phosphorus pentasulfide, the humidity and oxygen concentration in the first hopper, the second hopper and the third hopper all meet the requirements before adding materials in sequence, so that during the whole process of adding phosphorus pentasulfide, phosphorus pentasulfide will not react with water vapor to produce toxic hydrogen sulfide, thereby improving the safety of the process of adding phosphorus pentasulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereogram of an embodiment of the phosphorus pentasulfide feeding device of the utility model;

[0024] Figure 2 The utility model is a schematic cross-sectional structure diagram of a phosphorus pentasulfide feeding device embodiment.

[0025] In the figure:

[0026] 10-first hopper; 11-second hopper; 12-third hopper; 13-first gate valve; 14-second gate valve; 15-nitrogen storage tank; 16-first air pipe; 161-first air pump; 162-first air valve; 17-carrier gas heater; 18-motor; 19-rotating shaft; 20-butt joint; 21-rotating joint; 211-fixed body; 212-rotating body; 22-fixed sleeve; 23-stirring air pipe; 24-control unit; 25-humidity sensor; 26-nitrogen concentration sensor; 27-second air pipe; 28-rapper; 29-third air pipe; 291-second air pump; 292-second air valve; 30-negative pressure air pipe; 31-negative pressure generator; 32-support leg; 321-upper support leg; 322-lower support leg; 33-weighing unit; 34-auger; 341-discharging pipe. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] In the description of the utility model, it should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0030] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be understood that the terms “first”, “second”, etc. used in the present application are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0032] In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] See also Figure 1As shown, the phosphorus pentasulfide feeding device disclosed in the embodiment of the present application may include a first hopper 10, a second hopper 11, and a third hopper 12 arranged in sequence from top to bottom, and a first gate valve 13 is arranged between the discharge end of the first hopper 10 and the feed end of the second hopper 11. The first gate valve 13 is used to control whether the phosphorus pentasulfide in the first hopper 10 falls into the second hopper 11. The second gate valve 14 is arranged between the discharge end of the second hopper 11 and the feed end of the third hopper 12. The second gate valve 14 is used to control whether the phosphorus pentasulfide in the second hopper 11 falls into the third hopper 12. The nitrogen storage tank 15 is placed on one side of the third hopper 12. The first air pipe 16 connects the nitrogen storage tank 15 and the first hopper 10. The first air pipe 16 is equipped with a first air pump 161 and a first air valve 162. The outlet end of the first air pipe 16 extends into the first hopper 10. The carrier gas heater 17 is installed on the first air pipe 16 for heating the nitrogen. The first air pump 161 heats the nitrogen from the nitrogen storage tank 15 and then inputs it into the first hopper 10, so as to reduce the oxygen content in the first hopper 10 and remove the water vapor in the gas in the first hopper 10 to prevent the phosphorus pentasulfide from reacting with the water vapor to generate toxic hydrogen sulfide.

[0035] Specifically, during use, a certain amount of phosphorus pentasulfide is added into the first hopper 10, and then heated nitrogen is introduced into the first hopper 10 to remove the water vapor in the first hopper 10 and reduce the oxygen concentration in the first hopper 10. After the humidity and oxygen concentration in the first hopper 10 meet the requirements, the first gate valve 13 is opened, and the phosphorus pentasulfide in the first hopper 10 is put into the second hopper 11. After the phosphorus pentasulfide in the first hopper 10 falls into the second hopper 11, the second gate valve 14 is opened, and the phosphorus pentasulfide in the second hopper 11 is put into the third hopper 12, and the phosphorus pentasulfide in the third hopper 12 is put into the next required process. Therefore, the present application sets the first hopper 10, the second hopper 11, the third hopper 12, the first gate valve 13, the second gate valve 14, and introduces heated nitrogen into the first hopper 10, so that during the process of adding phosphorus pentasulfide, the humidity and oxygen concentration in the first hopper 10, the second hopper 11 and the third hopper 13 meet the requirements, and then the materials are added. During the entire process of adding phosphorus pentasulfide, phosphorus pentasulfide will not react with water vapor to produce toxic hydrogen sulfide, thereby improving the safety of the process of adding phosphorus pentasulfide.

[0036] In one embodiment, see Figure 2As shown, the phosphorus pentasulfide feeding device also includes a motor 18, a rotating shaft 19, a butt joint 20, a rotary joint 21, a fixed sleeve 22, and at least one stirring air pipe 23; the motor 18 is installed on the top of the first hopper 10, the output shaft of the motor 18 extends inside the first hopper 10, one end of the rotating shaft 19 is connected to the output shaft of the motor 18 through a coupling transmission, the torque of the output shaft of the motor 18 is transmitted to the rotating shaft 19, and the other end of the rotating shaft 19 is fixedly connected to the butt joint 20 by welding or other fixing methods; the motor 18 drives the rotating shaft 19 to rotate, and the rotating shaft 19 drives the butt joint to rotate; the fixed sleeve 22 is fixed to the end of the air outlet end of the first air pipe 16 by welding or integral molding, and supports the fixed sleeve 22; the rotary joint 21 includes a fixed body 211 and a rotating body 212, the bottom of the rotating body 212 can rotate around the fixed body 211, during the rotation of the rotating body 212, the fixed body 211 does not rotate, so the fixed sleeve 22 does not rotate. The fixed sleeve 22 is fixed to the end of the gas outlet end of the first gas pipe 16, the fixed body 211 is fixedly connected to the fixed sleeve 22, the top of the rotating body 212 is fixedly connected to the bottom of the docking pipe 20, the gas inlet end of the stirring gas pipe 23 is fixed to the outer wall of the docking pipe 20, and the docking pipe 20 drives the stirring gas pipe 23 to rotate. The fixed sleeve 22 is hollow inside, the docking pipe 20 is hollow inside, the first gas pipe 16, the fixed sleeve 22, the docking pipe 20 and the stirring gas pipe 23 are connected in sequence, so that the heated nitrogen flows from the first gas pipe 16 to the first hopper 10, reducing the oxygen concentration and humidity in the first hopper 10. After the stirring air pipe 23 is heated by the heated nitrogen in the stirring air pipe 23, the phosphorus pentasulfide added to the first hopper 10 is stirred to dehumidify the phosphorus pentasulfide, prevent the phosphorus pentasulfide from reacting with water vapor, and prevent the phosphorus pentasulfide from agglomerating, so that the phosphorus pentasulfide in the first hopper 10 is dry before entering the second hopper 11, and the first hopper 10 is in a low-oxygen or oxygen-free atmosphere; then the first gate valve 13 is opened to put the phosphorus pentasulfide in the first hopper 10 into the second hopper 11; the dry phosphorus pentasulfide is put into the second hopper 11 in a low-oxygen or oxygen-free atmosphere, so that the phosphorus pentasulfide has a humidity that meets the requirement and is low-oxygen or oxygen-free during the process of being put into the second hopper 11, so that the phosphorus pentasulfide is prevented from reacting with water during the process of being put into the second hopper 11 to produce toxic gas hydrogen sulfide, and the safety of the phosphorus pentasulfide during being put into the second hopper 11 is improved.

[0037] In one embodiment, the stirring air pipe 23 is L-shaped, and the outlet of the stirring air pipe 23 is set upward. The stirring air pipe 23 is made of hard materials such as hard plastic, metal, etc., and is fixed to the butt joint pipe 20 by integral molding or welding and is connected to the butt joint pipe 20. The stirring air pipe 23 not only heats the phosphorus pentasulfide added to the first hopper 10, but also stirs and breaks it up to prevent the phosphorus pentasulfide from agglomerating. It heats while stirring to increase the speed of removing water vapor in the phosphorus pentasulfide. In the process of adding phosphorus pentasulfide to the first hopper 10, the height of the stirring air pipe 23 outlet end is higher than the height of the material of the added phosphorus pentasulfide. During the stirring process, the stirring air pipe 23 will not block the outlet hole of the stirring air pipe 23, so as to avoid the added phosphorus pentasulfide blocking the outlet hole of the stirring air pipe 23 to affect the heated nitrogen entering the first hopper 10 and affecting the low oxygen or oxygen-free atmosphere in the first hopper 10.

[0038] In one embodiment, the number of the stirring air pipes 23 is four, and they are evenly arranged on the outer circumference of the butt joint 20. The four stirring air pipes 23 are evenly arranged, which can increase the speed of removing water vapor and reducing oxygen concentration.

[0039] In one embodiment, the phosphorus pentasulfide feeding device also includes a control unit 24, a humidity sensor 25 and a nitrogen concentration sensor 26; the control unit 24 can adopt a PLC or a single-chip microcomputer, the sensing end of the humidity sensor 25 and the sensing end of the nitrogen concentration sensor 26 are both located in the first hopper 10, and the humidity sensor 25, the nitrogen concentration sensor 26, the first gate valve 13, and the second gate valve 14 are all electrically connected to the control unit 24.

[0040] The humidity sensor 25 monitors the humidity in the first hopper 10, and the nitrogen concentration sensor 26 monitors the nitrogen concentration in the first hopper 10. The control unit 24 presets the standard values ​​of the humidity and nitrogen concentration in the first hopper. When the humidity and nitrogen concentration in the first hopper 10 reach the preset values ​​set by the control unit 24, the control unit 24 controls the first gate valve 13 to open, so that all the phosphorus pentasulfide in the first hopper 10 falls into the second hopper 11; then, the control unit 24 controls the first gate valve 13 to close, and then the second gate valve 14 to open, and the phosphorus pentasulfide in the second hopper 11 falls into the third hopper 12. The process of feeding phosphorus pentasulfide from the first hopper 10 to the third hopper 12 is automated, manual operations are reduced, and the efficiency of the feeding process is improved. In addition, by presetting a specified temperature value and nitrogen concentration value in the control unit 24, the humidity sensor 25 and the nitrogen concentration sensor 26 monitor the humidity and nitrogen concentration in the first hopper 10, so that the humidity and nitrogen concentration in the first hopper 10 can be obtained more accurately and timely, and the humidity and atmosphere in the first hopper 10 can be accurately and timely monitored. The first gate valve 13 and the second gate valve 14 can be opened or closed more sensitively in time according to the monitored humidity and nitrogen concentration, so that the humidity or nitrogen concentration in the first hopper 10 or the second hopper 11 will not fluctuate greatly due to the failure to open or close the first gate valve 13 or the second gate valve 14 in time, thereby improving the accuracy of monitoring the humidity and nitrogen concentration in the first hopper 10.

[0041] In one embodiment, the phosphorus pentasulfide feeding device also includes a second air pipe 27 and a rapper 28 disposed on the second air pipe 27; the rapper 28 generates a nitrogen shock wave from the heated nitrogen input from the second air pipe 27 to vibrate the phosphorus pentasulfide in the second hopper 11, so that the phosphorus pentasulfide in the second hopper 11 falls more smoothly and thoroughly into the third hopper 12, thereby reducing the possibility of phosphorus pentasulfide sticking to the inner wall of the second hopper and improving the accuracy of feeding of the phosphorus pentasulfide feeding device.

[0042] One end of the second air pipe 27 is connected to the carrier gas heater 17, and the other end of the second air pipe 27 extends into the second hopper 11. The second air pipe 27 inputs heated nitrogen into the second hopper 11, and the heated nitrogen input into the second hopper 11 can remove water vapor in the second hopper 11, ensuring a low oxygen or oxygen-free atmosphere and dryness in the second hopper 11, thereby ensuring that phosphorus pentasulfide will not react with water vapor in the second hopper 11 during the feeding process to produce toxic gas hydrogen sulfide, further improving the safety of the phosphorus pentasulfide feeding process.

[0043] In one embodiment, the phosphorus pentasulfide feeding device further includes a third air pipe 29, one end of which is connected to the carrier gas heater 17, and the other end of the third air pipe 29 extends inside the third hopper 12. The third air pipe 29 is provided with a second air pump 291 and a second air valve 292.

[0044] The third air pipe 29 inputs heated nitrogen into the third hopper 12. The heated nitrogen input into the third hopper 12 can remove water vapor in the third hopper 12, ensuring a low-oxygen or oxygen-free atmosphere and dryness in the third hopper 12. Therefore, it is ensured that phosphorus pentasulfide will not react with water vapor in the third hopper 12 during the feeding process to produce toxic gas hydrogen sulfide, further improving the safety of the phosphorus pentasulfide adding process.

[0045] In one embodiment, the phosphorus pentasulfide feeding device further includes a negative pressure air pipe 30 and a negative pressure generator 31 , one end of the negative pressure air pipe 30 is connected to the negative pressure generator 31 , and the other end of the negative pressure air pipe 30 extends into the third hopper 12 .

[0046] The negative pressure generator 31 generates negative pressure, and after being connected to the third hopper 12 through the negative pressure air pipe 30, the third hopper 12 is also in a negative pressure state. The second hopper 11 is in a high pressure state relative to the third hopper 12, so that the phosphorus pentasulfide in the second hopper 11 falls from the second hopper 11 into the third hopper 12 more smoothly due to the pressure difference, thereby improving the smoothness of the phosphorus pentasulfide feeding process.

[0047] In one embodiment, the phosphorus pentasulfide feeding device also includes a support leg 32 with one end fixed to the bottom of the third hopper 12 and a weighing unit 33; the support leg 32 includes an upper support leg 321 and a lower support leg 322, the top of the upper support leg 321 is fixed to the bottom of the third hopper 12, and the weighing unit 33 is arranged between the upper support leg 321 and the lower support leg 322. The top of the upper leg 321 is fixed to the bottom of the third hopper 12 by welding or integral molding, and the bottom of the upper leg 321 is placed on the top of the weighing unit 33. The weighing unit 33 bears the weight of the first hopper 10, the second hopper 11, the third hopper 12, the phosphorus pentasulfide in the above three, and the components fixedly installed on the above three, so as to facilitate the measurement of the weight of the phosphorus pentasulfide added to the hopper without manual weighing, thereby increasing the speed of adding phosphorus pentasulfide, reducing the contact time of phosphorus pentasulfide with air when it is put into the first hopper 10, reducing the amount of air entering the first hopper 10, and reducing the amount of air that needs to be removed from the first hopper 10 later.

[0048] In one embodiment, the phosphorus pentasulfide feeding device further includes an auger 34, which is connected to the bottom of the third hopper 12. A discharge pipe 341 is provided at the bottom of the auger 34, which can transfer the phosphorus pentasulfide from the third hopper 12 to the next required process.

[0049] Working process:

[0050] A fixed amount of phosphorus pentasulfide is added into the first hopper 10, and then heated nitrogen is introduced into the first hopper 10 to remove the water vapor in the first hopper 10 and reduce the oxygen concentration in the first hopper 10. After the humidity and oxygen concentration in the first hopper 10 meet the requirements, the first gate valve 13 is opened, and the phosphorus pentasulfide in the first hopper 10 is put into the second hopper 11. After the phosphorus pentasulfide in the first hopper 10 falls into the second hopper 11, the second gate valve 14 is opened, and the phosphorus pentasulfide in the second hopper 11 is put into the third hopper 12, and the phosphorus pentasulfide in the third hopper 12 is put into the next required process.

[0051] Beneficial effects:

[0052] The present application provides a first hopper 10, a second hopper 11, a third hopper 12, a first gate valve 13, a second gate valve 14, and introduces heated nitrogen into the first hopper 10, so that during the process of adding phosphorus pentasulfide, the humidity and oxygen concentration in the first hopper 10, the second hopper 11 and the third hopper 13 all meet the requirements, and then the materials are added. During the entire process of adding phosphorus pentasulfide, phosphorus pentasulfide will not react with water vapor to produce toxic hydrogen sulfide, thereby improving the safety of the process of adding phosphorus pentasulfide.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A phosphorus pentasulfide feeding device, characterized in that: The invention comprises a first hopper (10), a second hopper (11), a third hopper (12), a first gate valve (13), a second gate valve (14), a nitrogen storage tank (15), a first air pipe (16) and a carrier gas heater (17); the first hopper (10), the second hopper (11) and the third hopper (12) are arranged in sequence from top to bottom; the first gate valve (13) is arranged between the discharge end of the first hopper (10) and the feed end of the second hopper (11); the second gate valve (14) is arranged between the discharge end of the second hopper (11) and the feed end of the third hopper (12); the first air pipe (16) is connected with the nitrogen storage tank (15) and the first hopper (10); the outlet end of the first air pipe (16) extends into the first hopper (10); the carrier gas heater (17) is arranged on the first air pipe (16); and the carrier gas heater (17) is used to heat nitrogen.

2. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a motor (18), a rotating shaft (19), a butt joint (20), a rotary joint (21), a fixed sleeve (22), and a stirring air pipe (23); The rotary joint (21) comprises a fixed body (211) and a rotating body (212); the bottom of the rotating body (212) can rotate around the fixed body (211); the fixed sleeve (22) is fixed to the end of the gas outlet of the first gas pipe (16); the fixed body (211) is fixedly connected to the fixed sleeve (22); the top of the rotating body (212) is fixedly connected to the bottom of the butt joint (20); and the gas inlet end of the stirring gas pipe (23) is fixed to the outer wall of the butt joint (20); The motor (18) is installed on the top of the first hopper (10), one end of the rotating shaft (19) is fixedly connected to the output end of the motor (18), and the other end of the rotating shaft (19) is fixedly connected to the butt joint (20); The first air pipe (16), the fixed sleeve (22), the butt joint pipe (20) and the stirring air pipe (23) are connected in sequence.

3. The phosphorus pentasulfide feeding device according to claim 2, characterized in that: The stirring air pipe (23) is L-shaped, and the outlet of the stirring air pipe (23) is arranged upward.

4. The phosphorus pentasulfide feeding device according to claim 2 or 3, characterized in that: The number of the stirring air pipes (23) is four and they are evenly arranged on the outer circumference of the butt joint pipe (20).

5. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a control unit (24), a humidity sensor (25) and a nitrogen concentration sensor (26); The sensing end of the humidity sensor (25) and the sensing end of the nitrogen concentration sensor (26) are both located in the first hopper (10), and the humidity sensor (25), the nitrogen concentration sensor (26), the first gate valve (13), and the second gate valve (14) are all electrically connected to the control unit (24).

6. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a second air pipe (27) and a rapper (28) disposed on the second air pipe (27); One end of the second air pipe (27) is connected to the carrier gas heater (17), and the other end of the second air pipe (27) extends into the interior of the second hopper (11).

7. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a third air pipe (29), one end of which is connected to the carrier gas heater (17), and the other end of which extends into the interior of the third hopper (12).

8. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a negative pressure air pipe (30) and a negative pressure generator (31), one end of the negative pressure air pipe (30) is connected to the negative pressure generator (31), and the other end of the negative pressure air pipe (30) extends into the interior of the third hopper (12).

9. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes a support leg (32) with one end fixed to the bottom of the third hopper (12) and a weighing unit (33); The supporting leg (32) comprises an upper supporting leg (321) and a lower supporting leg (322), the top of the upper supporting leg (321) is fixed to the bottom of the third hopper (12), and the weighing unit (33) is arranged between the upper supporting leg (321) and the lower supporting leg (322).

10. The phosphorus pentasulfide feeding device according to claim 1, characterized in that: It also includes an auger (34), which is connected to the bottom of the third hopper (12).

Images