Phosphorus trichloride rectification and purification device

Abstract

The utility model discloses a phosphorus trichloride rectification purification device, which belongs to the technical field of phosphorus trichloride processing, and adopts the technical scheme that the phosphorus trichloride rectification purification device comprises a heating chamber, the top of the heating chamber is fixedly communicated with a condensation chamber, the surface of the condensation chamber is fixedly sleeved with a lantern ring, and the right side of the surface of the lantern ring is fixedly connected with a supporting plate; a membrane separation assembly and a pretreatment chamber are fixedly connected to the two sides of the top of a supporting plate correspondingly, by arranging the membrane separation assembly, after a phosphorus trichloride raw material enters a separation box, the phosphorus trichloride raw material can pass through a flat sheet membrane, under the separation effect of the flat sheet membrane, phosphorus trichloride molecules can pass through the flat sheet membrane, impurities can be intercepted by the flat sheet membrane, and the phosphorus trichloride molecules can be separated by the flat sheet membrane. According to the membrane separation assembly, impurities in phosphorus trichloride raw materials can be filtered out, and the flat membrane is embedded in the movable frame, so that when the flat membrane needs to be cleaned and washed, the movable frame is taken out, the flexibility of the membrane separation assembly in use is improved, and the separation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus trichloride processing, in particular to a phosphorus trichloride distillation and purification device. Background Art

[0002] Phosphorus trichloride is a colorless, clear, fuming liquid. When exposed to humid air, phosphorus trichloride can be hydrolyzed into metaphosphorous acid and hydrogen chloride. It is irritating and corrosive to the skin and mucous membranes. Inhalation of a large amount of vapor in a short period of time can cause upper respiratory tract irritation symptoms, pharyngitis, bronchitis, and in severe cases, laryngeal edema can occur, leading to suffocation, pneumonia, or pulmonary edema. Long-term low-concentration contact can cause eye and respiratory irritation symptoms, and can cause phosphorus toxic oral diseases. In order to improve the purity of phosphorus trichloride, it is necessary to perform distillation and purification on the phosphorus trichloride.

[0003] In the process of purifying phosphorus trichloride in the existing distillation purification device, the contact time between the rising steam and the refluxed condensate is short, and the mass transfer efficiency between the two is not high, which reduces the efficiency and purity of phosphorus trichloride purification;

[0004] The existing patent (publication number: CN216703388U) is a distillation and purification device for phosphorus trichloride. Through the design of the condensing mechanism, tower plates, rotating shaft and second stirring plate, the steam moves upward and contacts the condensing mechanism, most of the steam hits the condensing plate and the conical fixed block, is condensed into reflux liquid, and drips downward, the descending reflux liquid and the ascending steam meet and mass transfer occurs, the water in the steam meets the reflux liquid and is liquefied by cooling, the phosphorus trichloride in the reflux liquid is vaporized by heating, and the rotating shaft drives the second stirring plate to rotate, and the airflow inside the space between the two adjacent groups of tower plates can be rotated during the rotation of the second stirring plate. The utility model can increase the contact area and contact time between the ascending steam and the descending reflux liquid, improve the mass transfer efficiency, and thus to a certain extent improve the efficiency of phosphorus trichloride purification and the purity of phosphorus trichloride.

[0005] In view of the above problems, existing patents have provided solutions. However, during the distillation and purification process of phosphorus trichloride, the phosphorus trichloride raw material may contain certain impurities with similar properties to phosphorus trichloride, and the impurities are difficult to be completely removed by distillation, thus affecting the purity of the product.

[0006] Therefore, a phosphorus trichloride rectification and purification device is proposed. Utility Model Content

[0007] The utility model aims to provide a phosphorus trichloride distillation and purification device, which can solve the problem that in the existing phosphorus trichloride distillation and purification process, the phosphorus trichloride raw material contains some impurities with properties similar to those of phosphorus trichloride, and the impurities are difficult to be completely removed by distillation, thereby affecting the purity of the product.

[0008] To achieve the above object, the utility model provides the following technical solution: a phosphorus trichloride distillation and purification device, comprising a heating chamber, the top of the heating chamber is fixedly connected to a condensing chamber, the surface of the condensing chamber is fixedly sleeved with a collar, the right side of the collar surface is fixedly connected to a support plate, the two sides of the top of the support plate are respectively fixedly connected to a membrane separation component and a pretreatment chamber, the interior of the membrane separation component is arranged as a pressurizing component, and the pressurizing component includes a centrifugal pump;

[0009] The membrane separation assembly includes a separation box, a movable frame, a flat membrane, a sealing plate and a handle. The separation box is fixedly connected to the left side of the top of the support plate, the movable frame is movably connected to the inside of the separation box, the flat membrane is embedded in the inside of the movable frame, the sealing plate is fixedly connected to the front side of the movable frame and a side of the sealing plate close to the separation box is set as a sealing ring, and the handle is fixedly connected to the front side of the sealing block.

[0010] Preferably, the centrifugal pump is fixedly connected to the top of the separation box, the outlet end of the centrifugal pump is fixedly connected to a material guide pipe, and the material guide pipe passes through the separation box and is fixedly connected to the separation box.

[0011] Preferably, the bottom of the material guide pipe is fixedly connected with a diversion pipe, and the bottom of the surface of the diversion pipe is fixedly connected with a discharge pipe, and the number of the discharge pipes is set to be several and evenly distributed.

[0012] Preferably, the inlet end of the centrifugal pump is fixedly connected to a suction pipe, and the side of the suction pipe close to the pretreatment chamber is fixedly connected to the pretreatment chamber.

[0013] Preferably, a filter screen is fixedly connected to the interior of the pretreatment chamber, and a cleaning plate is attached to the surface of the filter screen.

[0014] Preferably, a multi-stage electric push rod is fixedly connected to the top of the pretreatment chamber, the telescopic end of the multi-stage electric push rod extends to the interior of the pretreatment chamber, and the output end of the multi-stage electric push rod is fixedly connected to the top of the cleaning plate.

[0015] Preferably, a thread groove is provided on the front side of the separation box, and the internal threads of the sealing plate are connected with screws, and the screws are used in conjunction with the thread groove.

[0016] Preferably, the bottom of the separation box is fixedly connected with a delivery pipe, and the other end of the delivery pipe is fixedly connected with the heating chamber.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The present application sets a membrane separation component. When the phosphorus trichloride raw material enters the separation box, the phosphorus trichloride raw material will pass through the flat membrane. Under the separation effect of the flat membrane, the phosphorus trichloride molecules can pass through the flat membrane, while the impurities will be intercepted by the flat membrane, so that the impurities in the phosphorus trichloride raw material can be filtered out. Moreover, since the flat membrane is embedded in the movable frame, when the flat membrane needs to be cleaned and rinsed, the movable frame can be taken out, which improves the flexibility of the membrane separation component when used and further improves the separation effect.

[0019] 2. In the present application, by setting a pressurizing component, the centrifugal pump can suck out the phosphorus trichloride raw material in the pretreatment chamber through the suction pipe, and then the centrifugal pump will pressurize the phosphorus trichloride raw material, and then introduce the pressurized phosphorus trichloride raw material into the inside of the diversion pipe through the guide pipe, and then under the diversion effect of the diversion pipe, the phosphorus trichloride raw material will be discharged to the top of the flat membrane through the discharge pipe, thereby improving the separation effect of the phosphorus trichloride raw material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure diagram of the phosphorus trichloride distillation and purification device of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the membrane separation component of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the pressurizing component of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the pretreatment chamber of the utility model;

[0024] Figure 5 For this utility model Figure 2 Schematic diagram of part of the structure.

[0025] In the figure, 1. heating chamber; 2. condensation chamber; 3. sleeve ring; 4. support plate; 5. membrane separation assembly; 501. separation box; 502. movable frame; 503. flat membrane; 504. sealing plate; 505. handle; 6. pretreatment chamber; 7. pressurizing assembly; 701. centrifugal pump; 702. material guide pipe; 703. diverter pipe; 704. discharge pipe; 705. suction pipe; 8. filter screen; 9. cleaning plate; 10. multi-stage electric push rod; 11. threaded groove; 12. screw; 13. delivery pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 , the utility model provides a technical solution:

[0028] A phosphorus trichloride rectification and purification device comprises a heating chamber 1, the top of the heating chamber 1 is fixedly connected to a condensing chamber 2, a collar 3 is fixedly sleeved on the surface of the condensing chamber 2, a support plate 4 is fixedly connected to the right side of the surface of the collar 3, a membrane separation component 5 and a pretreatment chamber 6 are fixedly connected to both sides of the top of the support plate 4, a pressurizing component 7 is arranged inside the membrane separation component 5, and the pressurizing component 7 comprises a centrifugal pump 701;

[0029] The membrane separation assembly 5 includes a separation box 501, a movable frame 502, a flat membrane 503, a sealing plate 504 and a handle 505. The separation box 501 is fixedly connected to the left side of the top of the support plate 4, the movable frame 502 is movably connected to the inside of the separation box 501, the flat membrane 503 is embedded in the inside of the movable frame 502, the sealing plate 504 is fixedly connected to the front side of the movable frame 502 and the side of the sealing plate 504 close to the separation box 501 is set as a sealing ring, and the handle 505 is fixedly connected to the front side of the sealing block.

[0030] In this embodiment: by setting up a membrane separation component 5, when the phosphorus trichloride raw material enters the separation box 501, the phosphorus trichloride raw material will pass through the flat membrane 503. Under the separation effect of the flat membrane 503, the phosphorus trichloride molecules can pass through the flat membrane 503, while the impurities will be retained by the flat membrane 503, so that the impurities in the phosphorus trichloride raw material can be filtered out. Moreover, since the flat membrane 503 is embedded in the movable frame 502, when the flat membrane 503 needs to be cleaned and rinsed, the movable frame 502 can be taken out, thereby improving the flexibility of the membrane separation component 5 when used and further improving the separation effect.

[0031] Specifically, Figure 1 , Figure 3 As shown, the centrifugal pump 701 is fixedly connected to the top of the separation box 501 , and the outlet end of the centrifugal pump 701 is fixedly connected to a material guide pipe 702 , and the material guide pipe 702 passes through the separation box 501 and is fixedly connected to the separation box 501 .

[0032] Specifically, Figure 3As shown, the bottom of the guide pipe 702 is fixedly connected with a diversion pipe 703, and the bottom of the surface of the diversion pipe 703 is fixedly connected with a discharge pipe 704. The number of the discharge pipes 704 is set to be several and evenly distributed.

[0033] Specifically, Figure 1 , Figure 3 As shown, the inlet end of the centrifugal pump 701 is fixedly connected to a suction pipe 705 , and the side of the suction pipe 705 close to the pretreatment chamber 6 is fixedly connected to the pretreatment chamber 6 .

[0034] In this embodiment, a pressurizing component 7 is provided, and a centrifugal pump 701 can suck out the phosphorus trichloride raw material in the pretreatment chamber 6 through a suction pipe 705. Subsequently, the centrifugal pump 701 will pressurize the phosphorus trichloride raw material, and then the pressurized phosphorus trichloride raw material will be introduced into the inside of the diversion pipe 703 through the guide pipe 702. Under the diversion effect of the diversion pipe 703, the phosphorus trichloride raw material will be discharged to the top of the flat membrane 503 through the discharge pipe 704, thereby improving the separation effect of the phosphorus trichloride raw material.

[0035] Specifically, Figure 4 As shown, a filter screen 8 is fixedly connected to the interior of the pretreatment chamber 6 , and a cleaning plate 9 is attached to the surface of the filter screen 8 .

[0036] Specifically, Figure 1 , Figure 4 As shown, a multi-stage electric push rod 10 is fixedly connected to the top of the pretreatment chamber 6, the telescopic end of the multi-stage electric push rod 10 extends to the interior of the pretreatment chamber 6, and the output end of the multi-stage electric push rod 10 is fixedly connected to the top of the cleaning plate 9.

[0037] In this embodiment: through the above arrangement, the filter 8 can filter out large particles of impurities in the phosphorus trichloride raw material to prevent the large particles of impurities from clogging the flat membrane 503. The filtered large particles of impurities will remain on the surface of the filter 8. The multi-stage electric push rod 10 is started, and the multi-stage electric push rod 10 will drive the cleaning plate 9 to move downward. When the cleaning plate 9 moves, the impurities on the surface of the filter 8 can be cleaned, thereby improving the filtering effect of the filter 8.

[0038] Specifically, Figure 2 , Figure 5 As shown, a thread groove 11 is provided on the front side of the separation box 501 , and a screw 12 is connected to the inner thread of the sealing plate 504 , and the screw 12 cooperates with the thread groove 11 for use.

[0039] Specifically, Figure 1 As shown, the bottom of the separation box 501 is fixedly connected with a delivery pipe 13, and the other end of the delivery pipe 13 is fixedly connected with the heating chamber 1.

[0040] In this embodiment: through the above arrangement, the sealing plate 504 can be bolted to the separation box 501 by means of the screws 12, thereby improving the stability of the movable frame and the flat membrane 503 during use, and the conveying pipe 13 can introduce the separated phosphorus trichloride raw material into the interior of the heating chamber 1, so as to facilitate the subsequent distillation and purification of the phosphorus trichloride raw material.

[0041] Working principle: When the phosphorus trichloride raw material is distilled and purified, the phosphorus trichloride raw material is first introduced into the right side of the pretreatment chamber 6. The filter screen 8 can filter out the large particles of impurities in the phosphorus trichloride raw material passing through. The large particles of impurities that are filtered out will remain on the surface of the filter screen 8. Then the multi-stage electric push rod 10 is started, and the multi-stage electric push rod 10 will drive the cleaning plate 9 to move downward. When the cleaning plate 9 moves, the impurities on the surface of the filter screen 8 can be cleaned. Then the centrifugal pump 701 is started. The centrifugal pump 701 will suck out the phosphorus trichloride raw material in the pretreatment chamber 6 through the suction pipe 705. Then the centrifugal pump 701 will add the phosphorus trichloride raw material. The phosphorus trichloride raw material is pressurized, and then the pressurized phosphorus trichloride raw material is introduced into the inside of the shunt pipe 703 through the guide pipe 702. Under the shunting effect of the shunt pipe 703, the phosphorus trichloride raw material is discharged to the top of the flat membrane 503 through the discharge pipe 704. When the phosphorus trichloride raw material passes through the flat membrane 503, under the separation effect of the flat membrane 503, the phosphorus trichloride molecules can pass through the flat membrane 503, while the impurities will be retained by the flat membrane 503, so that the impurities in the phosphorus trichloride raw material can be filtered out. When it is necessary to clean and rinse the flat membrane 503, loosen the screw 12, and pull the handle 505 to take out the movable frame 502.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A phosphorus trichloride distillation and purification device, comprising a heating chamber (1), characterized in that: The top of the heating chamber (1) is fixedly connected to a condensing chamber (2); a collar (3) is fixedly sleeved on the surface of the condensing chamber (2); a support plate (4) is fixedly connected to the right side of the surface of the collar (3); a membrane separation component (5) and a pretreatment chamber (6) are fixedly connected to the two sides of the top of the support plate (4); a pressurizing component (7) is arranged inside the membrane separation component (5); and the pressurizing component (7) comprises a centrifugal pump (701); The membrane separation assembly (5) comprises a separation box (501), a movable frame (502), a flat membrane (503), a sealing plate (504) and a handle (505); the separation box (501) is fixedly connected to the left side of the top of the support plate (4); the movable frame (502) is movably connected to the inside of the separation box (501); the flat membrane (503) is embedded in the inside of the movable frame (502); the sealing plate (504) is fixedly connected to the front side of the movable frame (502) and a side of the sealing plate (504) close to the separation box (501) is provided as a sealing ring; and the handle (505) is fixedly connected to the front side of the sealing block.

2. A phosphorus trichloride rectification and purification device according to claim 1, characterized in that: The centrifugal pump (701) is fixedly connected to the top of the separation box (501), and the outlet end of the centrifugal pump (701) is fixedly connected to a material guide pipe (702), and the material guide pipe (702) passes through the separation box (501) and is fixedly connected to the separation box (501).

3. A phosphorus trichloride rectification and purification device according to claim 2, characterized in that: The bottom of the guide pipe (702) is fixedly connected to a diversion pipe (703), and the bottom of the surface of the diversion pipe (703) is fixedly connected to a discharge pipe (704), and the number of the discharge pipes (704) is set to be several and evenly distributed.

4. A phosphorus trichloride rectification and purification device according to claim 1, characterized in that: The inlet end of the centrifugal pump (701) is fixedly connected to a suction pipe (705), and the suction pipe (705) is fixedly connected to the pretreatment chamber (6) on a side close to the pretreatment chamber (6).

5. A phosphorus trichloride rectification and purification device according to claim 1, characterized in that: A filter screen (8) is fixedly connected to the interior of the pretreatment chamber (6), and a cleaning plate (9) is attached to the surface of the filter screen (8).

6. A phosphorus trichloride rectification and purification device according to claim 5, characterized in that: A multi-stage electric push rod (10) is fixedly connected to the top of the pretreatment chamber (6), the telescopic end of the multi-stage electric push rod (10) extends into the interior of the pretreatment chamber (6), and the output end of the multi-stage electric push rod (10) is fixedly connected to the top of the cleaning plate (9).

7. A phosphorus trichloride rectification and purification device according to claim 1, characterized in that: A thread groove (11) is provided on the front side of the separation box (501), and a screw (12) is connected to the inner thread of the sealing plate (504), and the screw (12) is used in conjunction with the thread groove (11).

8. A phosphorus trichloride rectification and purification device according to claim 1, characterized in that: The bottom of the separation box (501) is fixedly connected to a delivery pipe (13), and the other end of the delivery pipe (13) is fixedly connected to the heating chamber (1).

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