A phosphorus pentachloride impurity screening device

Abstract

The utility model discloses a phosphorus pentachloride impurity screening device, including body mechanism and screening mechanism, the body mechanism includes the casing, and the top wall board on the casing is fixed with the feeding hopper, the screening mechanism includes the first filter screen and the second filter screen from top to bottom and install in the casing in proper order, the inside wall on the feeding hopper is fixed with a plurality of magnetic attraction strips of equal interval, the top wall board on the casing is rotatably connected with the rotating shaft in the mode of through -going, the side wall on the rotating shaft is fixedly connected with a plurality of stirring board and a plurality of back -blow board the utility model through the filter screen to the impurity in phosphorus pentachloride is filtered, and stirring board and back -blow board respectively through the nozzle and back -blow mouth with the way of obliquely downward and vertically upward blow -off inert gas, effectively avoid the blockage of filter screen, reduce the maintenance and use cost of screening device, and the dry inert gas prevents the hydrolysis of phosphorus pentachloride during screening.

Description

Technical Field

[0001] This utility model belongs to the field of phosphorus pentachloride preparation technology, specifically relating to a phosphorus pentachloride impurity screening device. Background Technology

[0002] Phosphorus pentachloride is widely used in the synthesis of pharmaceuticals, pesticides, and electronic chemicals. However, mechanical impurities are easily mixed in during its production process, such as sloughed-off material from the reactor wall and solid particles carried by the raw materials. In order to improve the purity of phosphorus pentachloride, mechanical impurities need to be separated by a sieving device.

[0003] However, existing impurity screening devices require the use of electrically powered mechanical equipment such as vibrating screens to avoid clogging of the filter screen, resulting in high maintenance and operating costs. At the same time, moisture in the air during impurity screening causes phosphorus pentachloride to hydrolyze, affecting the purity of phosphorus pentachloride.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a phosphorus pentachloride impurity removal device that can solve the problems of high maintenance and operating costs, as well as the problem of easy hydrolysis during phosphorus pentachloride impurity removal.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A phosphorus pentachloride impurity removal device includes a main body and a screening mechanism. The main body includes a housing, and a feeding hopper is fixedly mounted on the top wall of the housing. The screening mechanism includes a first filter screen and a second filter screen installed sequentially from top to bottom inside the housing. Multiple magnetic strips are fixedly mounted at equal intervals on the inner side wall of the feeding hopper. A rotating shaft is rotatably connected to the top wall of the housing in a through manner. Multiple stirring plates and multiple backflush plates are fixedly connected to the side wall of the rotating shaft. The multiple stirring plates are respectively disposed above the first filter screen and the second filter screen, and the multiple backflush plates are respectively disposed below the first filter screen and the second filter screen. The screening mechanism also includes a gas supply component for supplying inert gas to the stirring plates and the backflush plates.

[0008] In one or more embodiments of this utility model, the hopper is covered with a sealing cover, and a conveying pipe is fixedly mounted on the sealing cover.

[0009] In one or more embodiments of this utility model, a discharge pipe is installed on the bottom wall panel of the housing, and a switch valve is installed on the discharge pipe.

[0010] In one or more embodiments of this utility model, a pair of sealed slag discharge doors are installed on the side wall of the housing, and the pair of sealed slag discharge doors correspond to the first filter screen and the second filter screen respectively.

[0011] In one or more embodiments of this utility model, the lower end of the rotating shaft passes through the first filter screen and the second filter screen in a rotatable manner and is positioned below the second filter screen, and the stirring plate and the backflushing plate are staggered in a mutually perpendicular manner.

[0012] In one or more embodiments of the present invention, the gas conveying assembly includes a through groove and a gas conveying channel. The through groove is axially opened inside the rotating shaft, and the gas conveying channel is opened inside the stirring plate and the backflush plate. The through groove and the gas conveying channel are connected.

[0013] In one or more embodiments of the present invention, multiple nozzles are installed at an angle on the front and rear sidewalls of the stirring plate, and the angle between the multiple nozzles and the sidewalls of the stirring plate is set to 45 degrees.

[0014] In one or more embodiments of this utility model, the top of the back-blowing plate is provided with a plurality of back-blowing nozzles at equal intervals, and the rotating shaft is provided with a plurality of air inlets on the side wall outside the top wall of the housing.

[0015] In one or more embodiments of this utility model, an air supply ring is rotatably connected to the outer side wall of the rotating shaft outside a plurality of air inlets, an air supply pipe is fixedly connected to the side wall of the air supply ring, and a dryer is installed at the end of the air supply pipe away from the air supply ring.

[0016] In one or more embodiments of this utility model, a connecting rod is fixedly connected to the lower end of the side wall of the rotating shaft, and a scraper is fixedly connected to the end of the connecting rod away from the rotating shaft.

[0017] Compared with the prior art, when the present invention filters impurities in phosphorus pentachloride through a filter screen, the stirring plate and the backflush plate blow inert gas through nozzles and backflush nozzles in an inclined downward and vertical upward manner, respectively, which effectively avoids filter screen clogging and reduces the maintenance and use cost of the screening device; at the same time, the dry inert gas protects the screening of phosphorus pentachloride and prevents hydrolysis of phosphorus pentachloride during screening. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of a phosphorus pentachloride impurity removal device according to an embodiment of the present invention;

[0020] Figure 2 This is a perspective view of a phosphorus pentachloride impurity removal device according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of a phosphorus pentachloride impurity removal device according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of a phosphorus pentachloride impurity removal device according to an embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of the backflush plate in this utility model;

[0024] Figure 6 This is a schematic diagram of the stirring plate and the backflush plate in this utility model;

[0025] Figure 7 This is an exploded view of the rotating shaft and the gas supply ring in this utility model.

[0026] Explanation of key figure labels:

[0027] 1-Main body, 11-Shell, 12-Feeding hopper, 13-Sealing cover, 14-Feeding pipe, 15-Discharge pipe, 16-Switch valve, 17-Sealed slag discharge door, 2-Screwing mechanism, 21-First filter screen, 22-Second filter screen, 23-Magnetic strip, 24-Rotating shaft, 25-Stirring plate, 26-Backflush plate, 27-Passage groove, 28-Air supply groove, 29-Nozzle, 210-Backflush nozzle, 211-Air inlet, 212-Air supply ring, 213-Air supply pipe, 214-Dryer, 215-Connecting rod, 216-Scraper. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] like Figures 1-4As shown, a phosphorus pentachloride impurity screening device according to one embodiment of the present invention includes a main body 1 and a screening mechanism 2. The main body 1 includes a housing 11, and a conveying hopper 12 is fixedly mounted on the top wall of the housing 11. The screening mechanism 2 includes a first filter screen 21 and a second filter screen 22 installed sequentially from top to bottom inside the housing 11. A plurality of magnetic strips 23 are fixedly mounted at equal intervals on the inner side wall of the conveying hopper 12. A rotating shaft 24 is rotatably connected to the top wall of the housing 11 in a through manner. A plurality of stirring plates 25 and a plurality of backflushing plates 26 are fixedly connected to the side wall of the rotating shaft 24. The plurality of stirring plates 25 are respectively disposed above the first filter screen 21 and the second filter screen 22, and the plurality of backflushing plates 26 are respectively disposed below the first filter screen 21 and the second filter screen 22. The screening mechanism 2 also includes a gas conveying assembly for conveying inert gas to the stirring plates 25 and the backflushing plates 26.

[0030] When this impurity removal device is in use, dry inert gas is first supplied to the housing 11 through the gas supply assembly, so that the housing 11 is in an oxygen-free and dry environment. Phosphorus pentachloride is then transported to the feed hopper 12. Multiple magnetic strips 23 adsorb metallic impurities in the phosphorus pentachloride and transport them to the housing 11. Inside the housing 11, the impurities are filtered through a first filter screen 21 and a second filter screen 22. Since the pore size of the first filter screen 21 is larger than that of the second filter screen 22, the impurities are processed by a filtration method that starts with larger pores and gradually decreases in size. The device separates particulate impurities from phosphorus pentachloride. The rotation of the rotating shaft 24 drives the stirring plate 25 and the backflushing plate 26 to rotate. The stirring plate 25 improves the screening efficiency of phosphorus pentachloride on the first filter screen 21 and the second filter screen 22 by stirring. The backflushing plate 26 effectively prevents clogging of the filter screens 21 and 22 by blowing backflushing gas onto them, thus improving the screening efficiency of phosphorus pentachloride impurities while preventing clogging. This improved device avoids the need for electrically powered mechanical equipment such as vibrating screens, reducing the maintenance and operating costs of the screening device. Furthermore, because phosphorus pentachloride is protected by a dry inert gas during screening within the shell 11, hydrolysis of phosphorus pentachloride during screening is effectively prevented.

[0031] like Figures 1-4 As shown, a sealing cover 13 is attached to the top of the feeding hopper 12, and a feeding pipe 14 is fixedly mounted on the sealing cover 13. The sealing cover 13 seals the top of the feeding hopper 12 to prevent the entry of external gas. The feeding pipe 14 is connected to the phosphorus pentachloride conveying pipe for conveying phosphorus pentachloride. At the same time, since the sealing cover 13 is detachable, it is possible to periodically remove metal impurities adsorbed on the magnetic strip 23.

[0032] like Figures 1-4As shown, a discharge pipe 15 is installed on the bottom wall panel of the shell 11, and a switch valve 16 is installed on the discharge pipe 15. The filtered phosphorus pentachloride is discharged through the discharge pipe 15.

[0033] like Figures 1-4 As shown, a pair of sealed slag discharge doors 17 are installed on the side wall of the housing 11. The pair of sealed slag discharge doors 17 correspond to the first filter screen 21 and the second filter screen 22 respectively. The impurities intercepted on the first filter screen 21 and the second filter screen 22 are periodically discharged through the corresponding sealed slag discharge doors 17.

[0034] like Figure 3 and Figure 6 As shown, the lower end of the rotating shaft 24 rotatably passes through the first filter screen 21 and the second filter screen 22 in sequence and is positioned below the second filter screen 22, so that the first filter screen 21 and the second filter screen 22 do not affect the rotation of the rotating shaft 24. The stirring plate 25 and the backflushing plate 26 are staggered in a mutually perpendicular manner, so that the stirring plate 25 agitates and moves the phosphorus pentachloride downward after sieving, and the backflushing plate 26 prevents large particles of impurities from clogging the first filter screen 21 and the second filter screen 22 by backflushing. The staggered arrangement of the stirring plate 25 and the backflushing plate 26 ensures that their effects on phosphorus pentachloride do not affect each other.

[0035] like Figures 3-5 As shown, the gas delivery assembly includes a through groove 27 and a gas delivery channel 28. The through groove 27 is axially opened inside the rotating shaft 24, and the gas delivery channel 28 is opened inside the stirring plate 25 and the backflush plate 26. The through groove 27 and the gas delivery channel 28 are connected, so that the through groove 27 can deliver inert gas to the gas delivery channel 28, so that the rotating shaft 24 can deliver the inert gas to the stirring plate 25 and the backflush plate 26.

[0036] like Figure 6 As shown, multiple nozzles 29 are installed at an angle on both the front and rear side walls of the stirring plate 25, and the angle between each nozzle 29 and the side wall of the stirring plate 25 is set to 45 degrees. When the stirring plate 25 rotates, it can spray inert gas in a downward tilting manner, which can be used to purge the material on the first filter screen 21 and the second filter screen 22, thereby improving the screening efficiency of the material.

[0037] like Figure 5 and Figure 6 As shown, the top of the backflush plate 26 is provided with multiple backflush nozzles 210 at equal intervals. Inert gas is conveyed upward through the backflush nozzles 210 to achieve backflushing of the first filter screen 21 and the second filter screen 22. The rotating shaft 24 is located on the side wall outside the top wall panel of the housing 11 and is provided with multiple air inlets 211.

[0038] like Figure 1 and Figure 7As shown, a gas supply ring 212 is rotatably connected to the outer side wall of the rotating shaft 24 outside the multiple air inlets 211. A gas supply pipe 213 is fixedly connected to the side wall of the gas supply ring 212. A dryer 214 is installed at the end of the gas supply pipe 213 away from the gas supply ring 212. After the dryer 214 dries the inert gas, it is transported to the gas supply ring 212 through the gas supply pipe 213. The gas supply ring 212 transports the gas through the air inlets 211 into the through groove 27, and then through the through groove 27 into the gas supply channel 28.

[0039] like Figure 4 As shown, a connecting rod 215 is fixedly connected to the lower end of the side wall of the rotating shaft 24, and a scraper 216 is fixedly connected to the end of the connecting rod 215 away from the rotating shaft 24. The rotation of the rotating shaft 24 drives the connecting rod 215 to rotate, and the rotation of the connecting rod 215 drives the scraper 216 to rotate. When the scraper 216 rotates, it prevents the phosphorus pentachloride after screening from adhering to the inner side wall of the bottom of the shell 11, so that the phosphorus pentachloride after screening is quickly discharged through the discharge pipe 15.

[0040] In use, the rotation of the rotating shaft 24 drives the stirring plate 25 and the backflush plate 26 to rotate, which in turn transports the inert gas dried by the dryer 214 to the through channel 27, and then to the gas delivery channel 28. Multiple nozzles 29 and backflush nozzles 210 transport the inert gas to the housing 11, creating a dry, oxygen-free environment in the housing 11. Then, phosphorus pentachloride is transported to the conveying hopper 12, and multiple magnetic strips 23 adsorb and transport the metallic impurities in the phosphorus pentachloride to the housing 11. Filtration is performed through the first filter screen 21 and the second filter screen 22. During filtration, the stirring plate 25 drives the phosphorus pentachloride to rotate, and the synchronous nozzle 29 blows the phosphorus pentachloride, which significantly improves the filtration efficiency of the first filter screen 21 and the second filter screen 22 for phosphorus pentachloride. At the same time, the backflush nozzle 210 sprays backflush gas upward to blow out the impurities blocked in the filter holes of the first filter screen 21 and the second filter screen 22, so as to avoid clogging of the first filter screen 21 and the second filter screen 22. The inert gas in the shell 11 protects the phosphorus pentachloride and ensures that hydrolysis will not occur during impurity removal.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A phosphorus pentachloride impurity screening device, characterized in that, include: The main body includes a housing, and a conveying hopper is fixedly mounted on the top wall panel of the housing; The screening mechanism includes a first filter screen and a second filter screen installed sequentially from top to bottom inside the housing. Multiple magnetic strips are fixed at equal intervals on the inner side wall of the feeding hopper. A rotating shaft is rotatably connected through the top wall of the housing. Multiple stirring plates and multiple backflush plates are fixedly connected to the side wall of the rotating shaft. The stirring plates are respectively arranged above the first filter screen and the second filter screen, and the backflush plates are respectively arranged below the first filter screen and the second filter screen. The screening mechanism also includes a gas supply assembly for supplying inert gas to the stirring plates and the backflush plates.

2. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, The hopper is covered with a sealing cap, and a conveying pipe is fixed on the sealing cap.

3. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, A discharge pipe is installed on the bottom wall panel of the housing, and a switch valve is installed on the discharge pipe.

4. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, The side wall of the housing is equipped with a pair of sealed slag discharge doors, which correspond to the first filter screen and the second filter screen respectively.

5. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, The lower end of the rotating shaft passes through the first and second filter screens in a rotatable manner and is positioned below the second filter screen. The stirring plate and the backflushing plate are staggered in a mutually perpendicular manner.

6. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, The gas delivery assembly includes a through groove and a gas delivery channel. The through groove is axially opened inside the rotating shaft, and the gas delivery channel is opened inside the stirring plate and the backflush plate. The through groove and the gas delivery channel are connected.

7. The phosphorus pentachloride impurity removal device according to claim 6, characterized in that, Multiple nozzles are installed at an angle on both the front and rear sidewalls of the stirring plate, and the angle between each nozzle and the sidewall of the stirring plate is set to 45 degrees.

8. The phosphorus pentachloride impurity removal device according to claim 7, characterized in that, The top of the back-blowing plate is provided with multiple back-blowing nozzles at equal intervals, and the rotating shaft is provided with multiple air inlets on the side wall outside the top wall panel of the housing.

9. The phosphorus pentachloride impurity removal device according to claim 8, characterized in that, An air supply ring is rotatably connected to the outer side wall of the rotating shaft on the outside of multiple air inlets. An air supply pipe is fixedly connected to the side wall of the air supply ring, and a dryer is installed at the end of the air supply pipe away from the air supply ring.

10. The phosphorus pentachloride impurity removal device according to claim 1, characterized in that, A connecting rod is fixedly connected to the lower end of the side wall of the rotating shaft, and a scraper is fixedly connected to the end of the connecting rod away from the rotating shaft.

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