Epoxidation reaction device

Abstract

The utility model discloses an epoxidation reaction device which comprises a tank body, a tank cover is fixedly arranged at the top of the tank body, an air inlet is arranged on the outer wall of the tank body close to the bottom, a discharge port is arranged at the bottom end of the tank body, and a plurality of packed beds are arranged in the tank body above the air inlet. An air outlet is formed in the top of the tank cover, a pressure relief pipe and a pressure relief opening are arranged at the top of the tank cover, and a pressure relief valve is mounted on the pressure relief pipe; through the arrangement of the pressure relief pipe and the pressure relief valve, when the pressure intensity in the tank body is too high, the pressure relief valve is automatically opened so as to guide redundant gas into the recovery pipe through the pressure relief pipe, and when the pressure relief valve fails and cannot be automatically opened, after the pressure intensity in the tank body is continuously increased, the explosion venting piece at the pressure relief opening can be broken through, and the explosion venting piece can be recovered. According to the reaction device, by arranging the telescopic pipe, redundant gas in the tank body is discharged into the recovery pipe through the telescopic pipe, so that the safety of the reaction device is effectively improved, and by arranging the telescopic pipe, the explosion venting sheet is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an epoxidation reaction device. Background Art

[0002] Hexafluoropropylene oxide is one of the main raw materials for the preparation of perfluorohexanone. It is produced by the epoxidation reaction of hexafluoropropylene. In the prior art, the production of hexafluoropropylene oxide is carried out by mixing hexafluoropropylene gas and oxygen in a certain proportion, and then introducing the gaseous mixture into a reactor. The hexafluoropropylene gas and oxygen fully react in the solvent layer, and the resulting reactants continuously accumulate in the gas phase space in the reactor. The pressure is adjusted to control the continuous discharge of the reactants out of the reactor.

[0003] Since the pressure inside the hexafluoropropylene oxide reactor is relatively high during the preparation of hexafluoropropylene oxide using an epoxidation reactor, such reactors need to be equipped with a pressure relief valve to ensure the safety of the device. However, the use of a single pressure relief valve is not safe enough. When the pressure relief valve fails, there is still a major safety hazard, which needs to be improved. Utility Model Content

[0004] The purpose of the present invention is to provide an epoxidation reaction device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An epoxidation reaction device comprises a tank body, a tank cover is fixedly installed on the top of the tank body, an air inlet is provided on the outer wall of the tank body near the bottom, a discharge port is provided at the bottom end of the tank body, a plurality of filler beds are provided in the tank body above the air inlet, an air outlet is provided on the top of the tank cover, a pressure relief pipe and a pressure relief port are provided on the top of the tank cover, a pressure relief valve is installed on the pressure relief pipe, the pressure relief port is connected to a recovery pipe through a telescopic pipe, an explosion relief plate is sealed between the pressure relief port and the bottom end of the telescopic pipe, a weak groove is provided at the corresponding position of the explosion relief plate and the pressure relief port opening, and the air outlet end of the pressure relief pipe is connected to the recovery pipe.

[0007] As a further solution of the present invention: the telescopic tube includes an inner tube and a sleeve, the bottom end of the inner tube is connected to the pressure relief port flange, the explosion relief plate is located between the pressure relief port and the inner tube, two sealing gaskets are arranged between the pressure relief port and the inner tube, and the two sealing gaskets are respectively located on both sides of the explosion relief plate, the explosion relief plate is provided with a through hole for passing bolts, the top end of the inner tube is located in the inner end of the sleeve, the top end of the sleeve is connected to the recovery pipe flange, and the top outer wall of the inner tube and the bottom inner wall of the sleeve are both embedded with sealing rings.

[0008] As a further scheme of the utility model: the middle part of the explosion venting sheet is integrally formed with a spherical bulge part at the corresponding position of the bottom end opening of the explosion venting sheet.

[0009] As a further scheme of the utility model: a first grating plate is fixedly installed in the pressure relief port.

[0010] As a further scheme of the utility model: a second grating plate is fixedly installed in the inner tube.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses a kind of safety devices for epoxy reaction device, including tank body, gas inlet, discharge port, filler bed, tank cover, gas outlet, pressure relief pipe, pressure relief valve, pressure relief port, first grating plate, explosion venting sheet, spherical bulge part, weak groove, through hole, sealing gasket, inner tube, sleeve pipe, sealing ring, second grating plate and telescopic pipe, recovery pipe. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a kind of structure schematic view of epoxy reaction device.

[0014] Figure 2 It is Figure 1 Partial sectional view.

[0015] Figure 3 It is a kind of structure schematic view of explosion venting sheet in epoxy reaction device.

[0016] Among them, tank body 1, gas inlet 2, discharge port 3, filler bed 4, tank cover 5, gas outlet 6, pressure relief pipe 7, pressure relief valve 8, pressure relief port 9, first grating plate 10, explosion venting sheet 11, spherical bulge part 12, weak groove 13, through hole 14, sealing gasket 15, inner tube 16, sleeve pipe 17, sealing ring 18, second grating plate 19, telescopic pipe 20, recovery pipe 21. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] Please refer to Figures 1 to 3In an embodiment of the present invention, an epoxidation reaction device includes a tank body 1, a tank cover 5 is fixedly installed on the top of the tank body 1, an air inlet 2 is provided on the outer wall of the tank body 1 near the bottom, a discharge port 3 is provided at the bottom end of the tank body 1, a plurality of packing beds 4 are provided above the air inlet 2 in the tank body 1, an air outlet 6 is provided on the top of the tank cover 5, a pressure relief pipe 7 and a pressure relief port 9 are provided on the top of the tank cover 5, a pressure relief valve 8 is installed on the pressure relief pipe 7, the pressure relief port 9 is connected to the recovery pipe 21 through a telescopic tube 20, an explosion relief piece 11 is sealed between the pressure relief port 9 and the bottom end of the telescopic tube 20, a weak groove 13 is provided at the corresponding position of the explosion relief piece 11 and the opening of the pressure relief port 9, and the air outlet end of the pressure relief pipe 7 is connected to the recovery pipe 21.

[0019] By adopting the above-mentioned scheme, the utility model, when in use, after the mixed gas of hexafluoropropylene gas and oxygen enters the tank body 1 through the air inlet 2, contacts with the solvent in each packing layer to react and generate hexafluoropropylene oxide. By setting the pressure relief pipe 7 and the pressure relief valve 8, when the pressure in the tank body 1 is too high, the pressure relief valve 8 will automatically open to guide the excess gas into the recovery pipe 21 through the pressure relief pipe 7. When the pressure relief valve 8 fails to open automatically, causing the pressure in the tank body 1 to continue to increase, it will break through the explosion relief plate 11 at the pressure relief port 9, so that the excess gas in the tank body 1 is discharged into the recovery pipe 21 through the telescopic tube 20, thereby effectively improving the safety of the reaction device. The setting of the telescopic tube 20 facilitates the replacement of the explosion relief plate 11.

[0020] Specific combination Figure 1 and Figure 2 In one embodiment of the present utility model, the telescopic tube 20 includes an inner tube 16 and a sleeve 17. The bottom end of the inner tube 16 is flange-connected to the pressure relief port 9. The explosion-relief piece 11 is located between the pressure relief port 9 and the inner tube 16. Two sealing gaskets 15 are provided between the pressure relief port 9 and the inner tube 16. The two sealing gaskets 15 are respectively located on both sides of the explosion-relief piece 11. A through hole 14 for passing a bolt is opened on the explosion-relief piece 11. The top end of the inner tube 16 is located in the inner end of the sleeve 17. The top end of the sleeve 17 is flange-connected to the recovery pipe 21. The outer wall of the top end of the inner tube 16 and the inner wall of the bottom end of the sleeve 17 are both embedded with a sealing ring 18. A spherical protrusion 12 is integrally formed in the middle of the explosion-relief piece 11 corresponding to the opening of the bottom end of the explosion-relief piece 11, and the weak groove 13 is located at the spherical protrusion 12.

[0021] By providing a telescopic tube 20 consisting of an inner tube 16 and a sleeve 17, when the explosion venting disc 11 needs to be replaced, it is only necessary to remove the bolts connecting the inner tube 16 and the pressure relief port 9, move the inner tube 16 upward, and then take out the explosion venting disc 11 from between the inner tube 16 and the pressure relief port 9 and insert a new explosion venting disc 11. The operation is simple and convenient.

[0022] Specific combination Figure 2 In one embodiment of the present invention, a first grid plate 10 is fixedly installed in the pressure relief port 9 , and further, a second grid plate 19 is fixedly installed in the inner tube 16 .

[0023] The provision of the first grid plate 10 can prevent fragments generated when the explosion venting piece 11 is ruptured from falling into the tank body 1 through the pressure relief port 9 , and the provision of the second grid plate 19 can prevent fragments generated when the explosion venting piece 11 is ruptured from entering the recovery pipe 21 .

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An epoxidation reaction device, characterized in that: The invention comprises a tank body (1), a tank cover (5) is fixedly installed on the top of the tank body (1), an air inlet (2) is provided on the outer wall of the tank body (1) near the bottom, a discharge port (3) is provided at the bottom end of the tank body (1), a plurality of packing beds (4) are provided above the air inlet (2) in the tank body (1), an air outlet (6) is provided on the top of the tank cover (5), a pressure relief pipe (7) and a pressure relief port (9) are provided on the top of the tank cover (5), a pressure relief valve (8) is installed on the pressure relief pipe (7), the pressure relief port (9) is communicated with a recovery pipe (21) through a telescopic pipe (20), an explosion relief plate (11) is sealed between the pressure relief port (9) and the bottom end of the telescopic pipe (20), a weak groove (13) is provided at the corresponding position of the explosion relief plate (11) and the opening of the pressure relief port (9), and the air outlet end of the pressure relief pipe (7) is communicated with the recovery pipe (21).

2. An epoxidation reaction device according to claim 1, characterized in that: The telescopic tube (20) comprises an inner tube (16) and a sleeve (17). The bottom end of the inner tube (16) is flange-connected to the pressure relief port (9). The explosion relief plate (11) is located between the pressure relief port (9) and the inner tube (16). Two sealing gaskets (15) are provided between the pressure relief port (9) and the inner tube (16). The two sealing gaskets (15) are respectively located on both sides of the explosion relief plate (11). A through hole (14) for inserting a bolt is provided on the explosion relief plate (11). The top end of the inner tube (16) is located inside the inner end of the sleeve (17). The top end of the sleeve (17) is flange-connected to the recovery pipe (21). The outer wall of the top end of the inner tube (16) and the inner wall of the bottom end of the sleeve (17) are both embedded with a sealing ring (18).

3. An epoxidation reaction device according to claim 2, characterized in that: A spherical raised portion (12) is integrally formed at the middle of the explosion venting piece (11) and at a position corresponding to the bottom opening of the explosion venting piece (11), and the weak groove (13) is located at the spherical raised portion (12).

4. The epoxidation reaction device according to claim 1, characterized in that: A first grid plate (10) is fixedly installed in the pressure relief port (9).

5. An epoxidation reaction device according to claim 2, characterized in that: A second grid plate (19) is fixedly installed in the inner tube (16).

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