Reaction kettle of phosphorus oxychloride production system

Abstract

The utility model relates to the technical field of phosphorus oxychloride production, in particular to a reaction kettle of a phosphorus oxychloride production system. According to the technical scheme, the reaction kettle comprises a reaction kettle body, a fixed sleeve is fixedly installed at the axis position of the upper surface of the reaction kettle body, an air inlet pipe is fixedly connected to the upper surface of the fixed sleeve, a spiral spring is fixedly connected to the top of the inner wall of the fixed sleeve, and a hollow piston is fixedly connected to the tail end of the spiral spring; a plurality of communicating holes are formed in the outer surface of the hollow piston in an annular array at equal intervals, an annular groove is formed in the position, close to the lower surface, of the inner wall of the fixing sleeve, and a plurality of communicating grooves are formed in the position, located above the annular groove, of the inner wall of the fixing sleeve in an annular array at equal intervals. In the process of producing phosphorus oxychloride through oxidation reaction of the reaction kettle, the oxygen adding pipeline is prevented from being immersed in phosphorus oxychloride liquid for a long time, so that the oxygen adding pipeline is prevented from being damaged due to corrosion, and the service life of the oxygen adding pipeline is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus oxychloride production, in particular to a reaction kettle of a phosphorus oxychloride production system. Background Art

[0002] Phosphorus oxychloride is an important chemical raw material, which is widely used in the production of pesticides, medicines, dyes and flame retardants. It is mainly used to produce phosphates such as tricresyl phosphate. It can also be used for chlorination reaction after mixing with phosphorus trichloride. It is an intermediate in the production of dyes, a chlorinating agent and catalyst in organic synthesis, and an extractant for uranium ore.

[0003] At present, in the process of producing phosphorus oxychloride by oxidation method, an oxygen-adding pipe needs to be inserted into the interior of a reactor, and oxygen is injected from the interior of the reactor. However, since phosphorus oxychloride is highly corrosive, the oxygen-adding pipe is corroded and damaged when immersed in phosphorus oxychloride for a long time. Therefore, we propose a reactor for a phosphorus oxychloride production system. Utility Model Content

[0004] The utility model aims to provide a reactor for a phosphorus oxychloride production system, which has the advantages of preventing an oxygenating pipeline from being immersed in a phosphorus oxychloride liquid for a long time during the process of producing phosphorus oxychloride by oxidation reaction in the reactor, thereby preventing the oxygenating pipeline from being damaged by corrosion and extending the service life of the oxygenating pipeline, and solving the problem that in the process of producing phosphorus oxychloride by oxidation method, an oxygenating pipeline needs to be inserted into the interior of the reactor and oxygen is injected from the interior of the reactor, and since phosphorus oxychloride is highly corrosive, the oxygenating pipeline is damaged by corrosion when it is immersed in phosphorus oxychloride for a long time.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reactor of a phosphorus oxychloride production system, comprising a reactor body, a fixed sleeve fixedly installed at the axial position of the upper surface of the reactor body, an air inlet pipe fixedly connected to the upper surface of the fixed sleeve, a coil spring fixedly connected to the top of the inner wall of the fixed sleeve, a hollow piston fixedly connected to the end of the coil spring, a plurality of connecting holes equidistantly arranged in an annular array on the outer surface of the hollow piston, an annular groove is arranged at a position of the inner wall of the fixed sleeve near the lower surface, a plurality of connecting grooves equidistantly arranged in an annular array on the inner wall of the fixed sleeve at a position above the annular groove, and the connecting grooves are connected to the annular groove, and a lifting air pipe is fixedly connected to the lower surface of the hollow piston.

[0006] Preferably, an aeration plate is fixedly connected to the end of the lifting air pipe.

[0007] Preferably, a limiting ring is fixedly installed on the inner wall of the fixed sleeve at a position below the annular groove.

[0008] Preferably, a liquid adding valve is fixedly installed on one side of the upper surface of the reactor body.

[0009] Preferably, a liquid outlet valve is fixedly installed on one side of the lower surface of the reactor body.

[0010] Preferably, a plurality of legs are fixedly connected at equal intervals in a circular array near the edge of the lower surface of the reactor body.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model achieves the effect of preventing the oxygenation pipeline from being immersed in the phosphorus oxychloride liquid for a long time in the process of producing phosphorus oxychloride through oxidation reaction in the reactor by arranging a reactor body, a fixed sleeve, a coil spring, a hollow piston, a connecting hole, an annular groove, a connecting groove and a lifting air pipe, thereby preventing the oxygenation pipeline from being damaged by corrosion and extending the service life of the oxygenation pipeline. Oxygen enters the fixed sleeve through the air inlet pipe, and the air pressure inside the fixed sleeve increases. When the hollow piston moves downward, the coil spring stretches. When the hollow piston moves to the inside of the fixed sleeve close to the lower surface, the oxygenation pipeline is prevented from being damaged by corrosion and the service life of the oxygenation pipeline is extended. When the oxygen is in the fixed position, the end of the lifting air pipe is inserted into the phosphorus trichloride liquid in the reactor body. At this time, the oxygen in the fixed sleeve enters the hollow piston along the connecting groove, the annular groove and the connecting hole, and is then injected into the phosphorus trichloride liquid in the reactor body through the lifting air pipe. After the phosphorus trichloride and oxygen come into contact, phosphorus oxychloride is generated by reaction. After the oxygen injection is completed, the injection of oxygen into the fixed sleeve is stopped, and the stretched coil spring drives the hollow piston to rise and reset, so that the lifting air pipe is separated from the phosphorus oxychloride liquid in the reactor body, thereby avoiding the lifting air pipe from being damaged by corrosion.

[0013] 2. The utility model provides a limiting ring to limit the hollow piston, thereby preventing the hollow piston from slipping out of the fixed sleeve.

[0014] 3. The utility model uses an aeration plate to allow oxygen in the lift air pipe to evenly enter the phosphorus trichloride inside the reactor body after passing through the aeration plate. After the phosphorus trichloride and oxygen are evenly contacted, phosphorus oxychloride is reacted to form. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0018] Figure 4 It is a partial three-dimensional schematic diagram of the hollow piston of the utility model.

[0019] Figure numerals: 1. Support leg; 2. Reactor body; 3. Liquid adding valve; 4. Fixed sleeve; 5. Air inlet pipe; 6. Coil spring; 7. Lifting air pipe; 8. Aeration plate; 9. Liquid outlet valve; 10. Connecting groove; 11. Annular groove; 12. Limiting ring; 13. Hollow piston; 14. Connecting hole. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1-Figure 4 As shown, a phosphorus oxychloride production system reactor proposed by the utility model includes a phosphorus oxychloride production system reactor, including a reactor body 2, a liquid adding valve 3 is fixedly installed on one side of the upper surface of the reactor body 2, phosphorus trichloride liquid is added into the reactor body 2 from the liquid adding valve 3, a fixed sleeve 4 is fixedly installed at the axial position of the upper surface of the reactor body 2, an air intake pipe 5 is fixedly connected to the upper surface of the fixed sleeve 4, oxygen used for phosphorus oxychloride oxidation reaction is added into the fixed sleeve 4 through the air intake pipe 5, a coil spring 6 is fixedly connected to the top of the inner wall of the fixed sleeve 4, a hollow piston 13 is fixedly connected to the end of the coil spring 6, after oxygen is injected into the fixed sleeve 4, the air pressure inside the fixed sleeve 4 increases, and the coil spring 6 stretches while the hollow piston 13 moves downward.

[0022] The outer surface of the hollow piston 13 is provided with a plurality of connecting holes 14 in an annular array and equidistantly spaced from each other. The inner wall of the fixed sleeve 4 is provided with an annular groove 11 near the lower surface. The inner wall of the fixed sleeve 4 is provided with a plurality of connecting grooves 10 in an annular array and equidistantly spaced from each other above the annular groove 11. The connecting grooves 10 and 11 are connected. When the interior of the hollow piston 13 and the upper space thereof are connected through the connecting grooves 10 and 11, the oxygen inside the fixed sleeve 4 enters the interior of the hollow piston 13. A lifting air pipe 7 is fixedly connected to the lower surface of the hollow piston 13, and the lifting air pipe 7 rises and falls with the rise and fall of the hollow piston 13.

[0023] An aeration plate 8 is fixedly connected to the end of the lifting air pipe 7. After passing through the aeration plate 8, the oxygen in the lifting air pipe 7 evenly enters the phosphorus trichloride inside the reactor body 2. After the phosphorus trichloride and oxygen are evenly contacted, phosphorus oxychloride is reacted to generate a limit ring 12. The limit ring 12 limits the hollow piston 13 to prevent the hollow piston 13 from slipping out of the fixed sleeve 4. A liquid outlet valve 9 is fixedly installed on one side of the lower surface of the reactor body 2. The phosphorus oxychloride liquid generated by the reaction is discharged through the liquid outlet valve 9. A plurality of legs 1 are evenly fixedly connected to the lower surface of the reactor body 2 near the edge in a circular array.

[0024] When the utility model is in use, oxygen enters the interior of the fixed sleeve 4 through the air inlet pipe 5, then the air pressure inside the fixed sleeve 4 increases, the spiral spring 6 stretches while the hollow piston 13 moves downward, when the hollow piston 13 moves to the interior of the fixed sleeve 4 close to the lower surface, the end of the lifting air pipe 7 is inserted into the phosphorus trichloride liquid inside the reactor body 2, at this time, the oxygen inside the fixed sleeve 4 enters the interior of the hollow piston 13 along the connecting groove 10, the annular groove 11 and the connecting hole 14, and then is injected into the phosphorus trichloride liquid inside the reactor body 2 through the lifting air pipe 7, after the phosphorus trichloride and oxygen contact, they react to generate phosphorus oxychloride, and after the oxygen injection is completed, the injection of oxygen into the interior of the fixed sleeve 4 is stopped, then the stretched spiral spring 6 drives the hollow piston 13 to rise and reset, then the lifting air pipe 7 is separated from the phosphorus oxychloride liquid inside the reactor body 2, thereby avoiding the lifting air pipe 7 from being damaged by corrosion and extending its service life.

[0025] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A reactor for a phosphorus oxychloride production system, comprising a reactor body (2), characterized in that: A fixed sleeve (4) is fixedly installed at the axial center position of the upper surface of the reactor body (2); an air inlet pipe (5) is fixedly connected to the upper surface of the fixed sleeve (4); a coil spring (6) is fixedly connected to the top of the inner wall of the fixed sleeve (4); a hollow piston (13) is fixedly connected to the end of the coil spring (6); a plurality of connecting holes (14) are evenly spaced in an annular array on the outer surface of the hollow piston (13); an annular groove (11) is provided on the inner wall of the fixed sleeve (4) near the lower surface; a plurality of connecting grooves (10) are evenly spaced in an annular array on the inner wall of the fixed sleeve (4) at a position above the annular groove (11); and the connecting grooves (10) and the annular groove (11) are connected; and a lifting air pipe (7) is fixedly connected to the lower surface of the hollow piston (13).

2. A phosphorus oxychloride production system reactor according to claim 1, characterized in that: The end of the lifting air pipe (7) is fixedly connected to an aeration plate (8).

3. A phosphorus oxychloride production system reactor according to claim 1, characterized in that: A limiting ring (12) is fixedly installed on the inner wall of the fixed sleeve (4) at a position below the annular groove (11).

4. A reactor for phosphorus oxychloride production system according to claim 1, characterized in that: A liquid adding valve (3) is fixedly mounted on one side of the upper surface of the reaction kettle body (2).

5. A reactor for phosphorus oxychloride production system according to claim 1, characterized in that: A liquid outlet valve (9) is fixedly mounted on one side of the lower surface of the reaction kettle body (2).

6. A reactor for phosphorus oxychloride production system according to claim 5, characterized in that: A plurality of legs (1) are fixedly connected at equal intervals in a circular array near the edge of the lower surface of the reactor body (2).

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