Recovery device for phosphorus trichloride

Abstract

The utility model discloses a recovery device for phosphorus trichloride, which comprises a cooling chamber, two side walls in the cooling chamber are obliquely connected with a plurality of guide plates, the plurality of guide plates are alternately arranged in the oblique direction, and guide through holes are formed in one sides of the plurality of guide plates and at the lower edge positions. Tail gas obtained after water separation is introduced into the cooling chamber through the gas inlet pipe and then flows into the S-shaped channel composed of the multiple guide plates through the guide through holes, in the flowing process, the cooling effect of the condensation pipe is achieved, phosphorus trichloride in the tail gas is liquefied and falls into the surfaces of the guide plates, and therefore phosphorus trichloride in the tail gas is liquefied. And then phosphorus trichloride flows among the guide plates under the action of gravity and finally falls into toluene in the storage chamber to be stored, so that efficient recovery of trichlorotoluene is realized, the circulation time of tail gas in the cooling chamber is prolonged, and the recovery efficiency of phosphorus trichloride is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus trichloride recovery, in particular to a recovery device for phosphorus trichloride. Background Art

[0002] Phosphorus trichloride is a commonly used organic synthesis reagent and is also widely used in catalysts, flame retardants, pharmaceuticals and other fields. It is a colorless or light yellow transparent liquid with a pungent odor. Its hydrolysis products include hydrochloric acid and phosphites, etc. These products are also toxic to a certain extent. It can be used as one of the treatment methods for organic waste liquid. The main principle is to convert organic solvents into combustible gases and then treat them by burning.

[0003] In the prior art, for example, Chinese patent CN217410288U discloses a phosphorus trichloride recovery device, comprising a base, a mounting block is provided at the upper end of the base, a steam-water separator is provided at the upper end of the mounting block, a condenser is provided at the upper end of the base, a conveying pipe is provided between the steam-water separator and the condenser, a liquid sealing tank is provided above the base, and a feeding mechanism for feeding phosphorus trichloride is provided on the steam-water separator.

[0004] At present, most of the recovery devices cool down the phosphorus trichloride tail gas by passing the gas directly through the condensation tower. Since the phosphorus trichloride tail gas flows quickly in the condensation tower, some phosphorus trichloride still exists in the tail gas after leaving the condensation tower and cannot be recovered, thus reducing the recovery efficiency of phosphorus trichloride. Summary of the invention

[0005] The purpose of the utility model is to provide a recovery device for phosphorus trichloride to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a recovery device for phosphorus trichloride, comprising a cooling chamber, wherein the inner side walls of the cooling chamber are obliquely connected to a plurality of guide plates, the plurality of guide plates are alternately placed in oblique directions, a plurality of guide plates are provided with guide through holes on one side and at the lower edge, the bottom ends of the plurality of guide plates are fixedly connected to condensing pipes, the bottom end of the cooling chamber is fixedly connected to a storage chamber, and the storage chamber is filled with toluene.

[0007] As a further preferred embodiment of the present technical solution, a cleaning pipe is fixedly connected to one side of the cooling chamber near the upper edge, a suction pump is fixedly connected to the outer surface of the cleaning pipe, an input end of the suction pump is fixedly connected to a suction pipe, the other end of the suction pipe is fixedly connected to a storage box, one side of the storage box is fixedly connected to one side of the cooling chamber, and toluene is filled inside the storage box.

[0008] As a further preferred embodiment of the technical solution, a material guide plate is fixedly connected to a side wall of the cooling chamber at the position of the guide through hole of the guide plate at the bottom layer, and a guide bucket is fixedly connected to the inner surface of the cooling chamber.

[0009] As a further preferred embodiment of the present technical solution, a U-shaped tube is fixedly connected to one side of the cooling chamber and located at the upper edge position, and the other end of the U-shaped tube is fixedly connected to a purification chamber, and the bottom end of the purification chamber is fixedly connected to the top end of the cooling chamber.

[0010] As a further preferred embodiment of the present technical solution, a discharge port is fixedly connected to one side of the purification chamber and located at the lower edge, a sealing plug is inserted into the discharge port, one end of the sealing plug is interference fit with the inside of the discharge port, and an inclined plate is fixedly connected to the bottom surface of the purification chamber.

[0011] As a further preferred embodiment of the technical solution, an air inlet pipe is fixedly connected to one side of the cooling chamber and near the lower edge, and an exhaust pipe is fixedly connected to the top of the purification chamber.

[0012] As a further preferred embodiment of the present technical solution, one side of the storage chamber is fixedly connected to a feeding pipe, and the bottom end of the storage chamber is fixedly connected to a discharge pipe.

[0013] The utility model provides a recovery device for phosphorus trichloride, which has the following beneficial effects:

[0014] (1) The utility model introduces the exhaust gas after water separation into the cooling chamber through the air inlet pipe, and then flows into the S-shaped channel composed of multiple guide plates through the guide through hole. During the flow, the exhaust gas receives the cooling effect of the condenser, so that the phosphorus trichloride in the exhaust gas is liquefied and falls onto the surface of the guide plate. Then, the phosphorus trichloride flows between the guide plates under the action of gravity and finally falls into the toluene in the storage chamber for storage, thereby realizing the efficient recovery of trichlorotoluene, increasing the circulation time of the exhaust gas in the cooling chamber, and improving the recovery efficiency of the phosphorus trichloride.

[0015] (2) The utility model uses a pump to pump the toluene in the storage box into the cleaning pipe through the pump pipe, and then sends the toluene into the cooling chamber. Under the action of gravity, the toluene flows between the guide plates and takes away the phosphorus trichloride remaining on the guide plates, and finally falls into the storage chamber, thereby cleaning the inside of the cooling chamber and recovering the residual phosphorus trichloride, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a first structural schematic diagram of the utility model as a whole;

[0017] Figure 2 It is a second structural schematic diagram of the utility model as a whole;

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 4 It is a side view schematic diagram of the internal structure of the utility model.

[0020] In the figure: 1. Cooling chamber; 2. Guide plate; 3. Guide through hole; 4. Condenser; 5. Guide plate; 6. Guide bucket; 7. Storage chamber; 8. Purification chamber; 9. U-shaped tube; 10. Cleaning tube; 11. Storage box; 12. Extraction tube; 13. Extraction pump; 14. Inlet pipe; 15. Exhaust pipe; 16. Feeding tube; 17. Discharge tube; 18. Discharge port; 19. Sealing plug; 20. Inclined plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figure 1-4 As shown, in the present embodiment, a recovery device for phosphorus trichloride comprises a cooling chamber 1, wherein the inner side walls of the cooling chamber 1 are obliquely connected with a plurality of guide plates 2, the plurality of guide plates 2 are alternately placed in oblique directions, a guide through hole 3 is provided on one side of the plurality of guide plates 2 and located at the lower edge position, a condenser tube 4 is fixedly connected to the bottom end of the plurality of guide plates 2, a storage chamber 7 is fixedly connected to the bottom end of the cooling chamber 1, and the storage chamber 7 is filled with toluene, and the tail gas can be blocked by the colored guide plates 2, and the flow path of the tail gas in the cooling chamber 1 can be increased by setting a plurality of guide plates 2, so that the tail gas can be fully cooled and the recovery efficiency of phosphorus trichloride can be improved, and the guide plates 2 are obliquely set, so that the liquefied phosphorus trichloride solution can flow between the guide plates 2 under the action of gravity and fall into the storage chamber 7 for storage, and the storage chamber 7 can be filled with toluene to store the phosphorus trichloride to prevent it from reacting with moisture in the air.

[0023] like Figure 2 As shown, a cleaning pipe 10 is fixedly connected to one side of the cooling chamber 1 and near the upper edge, a suction pump 13 is fixedly connected to the outer surface of the cleaning pipe 10, an input end of the suction pump 13 is fixedly connected to a suction pipe 12, and the other end of the suction pipe 12 is fixedly connected to a storage box 11, one side of the storage box 11 is fixedly connected to one side of the cooling chamber 1, and the storage box 11 is filled with toluene. By setting the suction pump 13, toluene can be pumped into the cooling chamber 1.

[0024] like Figure 3 and Figure 4As shown, a guide plate 5 is fixedly connected to a side wall of the cooling chamber 1 and located at the guide through hole 3 of the bottom guide plate 2, and a guide bucket 6 is fixedly connected to the inner surface of the cooling chamber 1. By providing the guide plate 5, the phosphorus trichloride solution can be guided into the storage chamber 7. By providing the guide bucket 6, the convergence of the phosphorus trichloride solution can be accelerated and the recovery efficiency can be improved.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a U-shaped tube 9 is fixedly connected to one side of the cooling chamber 1 and located at the upper edge position, and the other end of the U-shaped tube 9 is fixedly connected to a purification chamber 8. The bottom end of the purification chamber 8 is fixedly connected to the top end of the cooling chamber 1. By setting the U-shaped tube 9, the sealing performance can be improved, and the purification chamber 8 is filled with liquid water.

[0026] like Figure 1 and Figure 3 As shown, a discharge port 18 is fixedly connected to one side of the purification chamber 8 and located at the lower edge position, a sealing plug 19 is inserted into the discharge port 18, one end of the sealing plug 19 is interference fit with the inside of the discharge port 18, and an inclined plate 20 is fixedly connected to the bottom surface of the purification chamber 8. By setting the inclined plate 20, the reactants can be discharged faster during discharge.

[0027] like Figure 1 and Figure 2 As shown, an air inlet pipe 14 is fixedly connected to one side of the cooling chamber 1 and near the lower edge, and an exhaust pipe 15 is fixedly connected to the top of the purification chamber 8, so as to determine the flow route of the exhaust gas.

[0028] like Figure 2 , Figure 3 and Figure 4 As shown, a feeding pipe 16 is fixedly connected to one side of the storage chamber 7, and a discharge pipe 17 is fixedly connected to the bottom end of the storage chamber 7. By setting the feeding pipe 16, feeding can be carried out, and by setting the discharge pipe 17, materials can be collected.

[0029] The utility model provides a recovery device for phosphorus trichloride, and the specific working principle is as follows:

[0030] The air inlet pipe 14 passes the exhaust gas after water separation into the cooling chamber 1, and then flows through the guide through hole 3 to the S-shaped channel composed of multiple guide plates 2. During the flow, the phosphorus trichloride in the exhaust gas is liquefied and falls onto the surface of the guide plate 2 due to the cooling effect of the condenser 4. Then, the phosphorus trichloride flows between the guide plates 2 under the action of gravity, and finally falls into the toluene in the storage chamber 7 for storage. The remaining exhaust gas enters the purification chamber 8 through the U-shaped tube 9. When the exhaust gas passes through water, the remaining phosphorus trichloride in the exhaust gas reacts with water to generate a by-product of phosphorous acid. When the phosphorus trichloride is recovered, the extraction pump 13 pumps the toluene in the storage box 11 into the cleaning pipe 10 through the extraction pipe 12, and sends the toluene into the cooling chamber 1. Under the action of gravity, the toluene flows between the guide plates 2 and takes away the phosphorus trichloride remaining on the guide plates 2, and finally falls into the storage chamber 7 for storage.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for recovering phosphorus trichloride, comprising a cooling chamber (1), characterized in that: The inner side walls of the cooling chamber (1) are obliquely connected to a plurality of guide plates (2), the plurality of guide plates (2) are alternately placed in oblique directions, a guide through hole (3) is provided on one side of the plurality of guide plates (2) and at the lower edge, the bottom ends of the plurality of guide plates (2) are fixedly connected to a condensing tube (4), the bottom end of the cooling chamber (1) is fixedly connected to a material storage chamber (7), and the material storage chamber (7) is filled with toluene.

2. A recovery device for phosphorus trichloride according to claim 1, characterized in that: A cleaning pipe (10) is fixedly connected to one side of the cooling chamber (1) near the upper edge, a pumping pump (13) is fixedly connected to the outer surface of the cleaning pipe (10), an input end of the pumping pump (13) is fixedly connected to a pumping pipe (12), and the other end of the pumping pipe (12) is fixedly connected to a storage box (11), one side of the storage box (11) is fixedly connected to one side of the cooling chamber (1), and toluene is filled inside the storage box (11).

3. A recovery device for phosphorus trichloride according to claim 2, characterized in that: A material guide plate (5) is fixedly connected to a side wall of the cooling chamber (1) at the position of the guide through hole (3) of the guide plate (2) at the bottom layer, and a guide bucket (6) is fixedly connected to the inner surface of the cooling chamber (1).

4. A recovery device for phosphorus trichloride according to claim 3, characterized in that: A U-shaped tube (9) is fixedly connected to one side of the cooling chamber (1) and located at the upper edge position, and the other end of the U-shaped tube (9) is fixedly connected to a purification chamber (8), and the bottom end of the purification chamber (8) is fixedly connected to the top end of the cooling chamber (1).

5. A recovery device for phosphorus trichloride according to claim 4, characterized in that: A discharge port (18) is fixedly connected to one side of the purification chamber (8) and located at the lower edge. A sealing plug (19) is inserted into the discharge port (18). One end of the sealing plug (19) is interference fit with the inside of the discharge port (18). An inclined plate (20) is fixedly connected to the bottom surface of the purification chamber (8).

6. A recovery device for phosphorus trichloride according to claim 5, characterized in that: An air inlet pipe (14) is fixedly connected to one side of the cooling chamber (1) and close to the lower edge thereof, and an exhaust pipe (15) is fixedly connected to the top of the purification chamber (8).

7. A recovery device for phosphorus trichloride according to claim 1, characterized in that: One side of the material storage chamber (7) is fixedly connected to a feeding pipe (16), and the bottom end of the material storage chamber (7) is fixedly connected to a discharge pipe (17).

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