Iodine feeding device of chlorination kettle for tetrachlorophthalic anhydride production

Abstract

The utility model discloses a tetrachlorophthalic anhydride production chlorination kettle iodine adding device, which comprises an upper iodine adding valve, a lower iodine adding valve and an iodine solution transfer tank, the iodine solution transfer tank is arranged between the upper iodine adding valve and the lower iodine adding valve, the outer side of the iodine solution transfer tank is communicated with two communicating pipes, one ends of the two communicating pipes far away from the iodine solution transfer tank are communicated with a communicating box, and the communicating box is communicated with the upper iodine adding valve and the lower iodine adding valve. The end, away from the communicating pipe, of the communicating box communicates with a pressure-regulating external pipe. The effective volume between the upper iodine adding valve and the lower iodine adding valve can be increased through the arranged iodine solution transfer tank, and the pressure difference among the upper iodine adding valve, the iodine solution transfer tank and the lower iodine adding valve is adjusted in a matched manner, so that two kilograms of iodine can be added at one time, the upper iodine adding valve and the lower iodine adding valve do not need to be repeatedly opened and closed, the operation becomes simple, the labor intensity is reduced, and the production efficiency is improved. And the iodine is added in a pressure difference manner, so that the unorganized emission of harmful gas in the kettle is avoided, the risk that the iodine is suddenly flushed out is greatly reduced, and the personal safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tetrachlorophthalic anhydride production technology, specifically to an iodine dosing device for a chlorination reactor in the production of tetrachlorophthalic anhydride. Background Technology

[0002] The existing iodine addition structure in the central control station chlorination reactor uses two stacked valves. Each batch of iodine is two kilograms. Due to the limited space between the valves, all the iodine cannot be added into the reactor at once. The 2 kg of iodine can only be added into the reactor by repeatedly opening and closing the upper and lower valves. The operation is cumbersome and risky, and there is a possibility of unorganized gas emission from the reactor. In some cases, iodine clumps between the valves can cause gas to rush out during iodine addition, resulting in iodine loss and endangering the safety of the operators. Utility Model Content

[0003] The purpose of this invention is to provide an iodine dosing device for the chlorination reactor in the production of tetrachlorophthalic anhydride, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an iodine dosing device for a chlorination reactor in the production of tetrachlorophthalic anhydride, comprising an upper iodine valve, a lower iodine valve, and an iodine solution transfer tank. The iodine solution transfer tank is installed between the upper and lower iodine valves. Two connecting pipes are connected to the outside of the iodine solution transfer tank. A connecting box is connected to the end of the two connecting pipes away from the iodine solution transfer tank. A pressure regulating external pipe is connected to the end of the connecting box away from the connecting pipes.

[0005] Preferably, the upper iodine valve includes an upper main valve housing, an upper connecting shell is sealed and installed at the bottom of the upper main valve housing, a sealing connecting plate three is fixedly installed at the top of the upper main valve housing, a sealing connecting plate two is fixedly installed at the bottom of the upper connecting shell, an upper valve ball is rotatably installed inside the upper main valve housing, an upper rotating rod is fixedly installed on the outer side of the upper valve ball, and an upper rotating handle is fixedly installed on the outer side of the upper rotating rod away from the upper valve ball.

[0006] Preferably, the lower iodine valve includes a lower main valve housing, a lower connecting shell is sealed and installed on the top of the lower main valve housing, a sealing connecting plate six is ​​fixedly installed on the top of the lower connecting shell, a sealing connecting plate five is fixedly installed on the bottom of the lower main valve housing, a lower valve ball is rotatably installed inside the lower main valve housing, a lower rotating rod is fixedly installed on the outer side of the lower valve ball, and a lower rotating handle is fixedly installed on the outer side of the lower rotating rod away from the lower valve ball.

[0007] Preferably, a sealing connecting plate one is fixedly installed on the top of the iodine solution transfer tank, and a sealing connecting plate four is fixedly installed on the bottom of the iodine solution transfer tank.

[0008] Preferably, the end of the sealing connecting plate one away from the iodine transfer tank is sealed to the end of the sealing connecting plate two away from the upper connecting shell by fastening bolts.

[0009] Preferably, the end of the sealing connecting plate four away from the iodine transfer tank is sealed to the end of the sealing connecting plate six away from the lower connecting shell by fastening bolts.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the iodine solution transfer tank can increase the effective volume between the upper and lower iodine addition valves, and by adjusting the pressure difference between the upper iodine addition valve, the iodine solution transfer tank, and the lower iodine addition valve, it can be ensured that two kilograms of iodine can be added at once without repeatedly opening and closing the upper and lower iodine addition valves, making the operation simple and reducing labor intensity. Furthermore, the use of pressure difference for iodine addition not only avoids the unorganized emission of harmful gases in the vessel, but also greatly reduces the risk of sudden iodine leakage, thus ensuring personal safety. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present utility model.

[0012] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0013] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0014] In the diagram: 1. Upper main valve housing; 2. Upper connecting housing; 3. Sealing connecting plate one; 4. Sealing connecting plate two; 5. Upper rotary handle; 6. Sealing connecting plate three; 7. Connecting pipe; 8. Connecting box; 9. Pressure regulating external pipe; 10. Iodine solution transfer tank; 11. Sealing connecting plate four; 12. Lower connecting housing; 13. Lower main valve housing; 14. Sealing connecting plate five; 15. Lower rotary handle; 16. Lower rotating rod; 17. Lower valve ball; 18. Upper rotating rod; 19. Upper valve ball; 20. Sealing connecting plate six. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-3This utility model provides a technical solution: an iodine dosing device for a chlorination reactor in the production of tetrachlorophthalic anhydride, comprising an upper iodine valve, a lower iodine valve, and an iodine solution transfer tank 10. The iodine solution transfer tank 10 is installed between the upper iodine valve and the lower iodine valve. Two connecting pipes 7 are connected to the outside of the iodine solution transfer tank 10. A connecting box 8 is connected to the end of the two connecting pipes 7 away from the iodine solution transfer tank 10. A pressure regulating external pipe 9 is connected to the end of the connecting box 8 away from the connecting pipes 7.

[0017] The working principle of the above technical solution is as follows: First, connect the upper iodine addition valve to the iodine addition pipe and the lower iodine addition valve to the reaction vessel. Then, connect the lower valve to an external pressure regulating device via the external pressure regulating pipe 9. Next, the external pressure regulating device extracts the gas inside the iodine transfer tank 10 through the external pressure regulating pipe 9, the connecting box 8, and the two connecting pipes 7, thereby reducing the pressure inside the iodine transfer tank 10. When iodine addition is needed, first open the upper iodine addition valve. The iodine solution will enter the iodine transfer tank 10 all at once under the pressure difference. Then, close the upper iodine addition valve and connect the external pressure regulating device... Gas is injected into the iodine transfer tank 10 via the pressure regulating external pipe 9, the connecting box 8, and the two connecting pipes 7, causing the pressure in the iodine transfer tank 10 to rise. Then, the lower iodine valve is opened, and the iodine inside the iodine transfer tank 10 will completely enter the interior of the reactor under the action of pressure difference, thus ensuring that two kilograms of iodine can be added at once without repeatedly opening and closing the upper and lower iodine valves, simplifying the operation, reducing labor intensity, and using pressure difference for iodine addition. This not only avoids the unorganized emission of harmful gases in the reactor, but also greatly reduces the risk of sudden iodine leakage, ensuring personal safety.

[0018] In another implementation scheme, such as Figures 1-3As shown, the upper iodine valve includes an upper main valve housing 1, with an upper connecting housing 2 sealed at the bottom of the upper main valve housing 1. A sealing connecting plate 3 6 is fixedly installed at the top of the upper main valve housing 1, and a sealing connecting plate 2 4 is fixedly installed at the bottom of the upper connecting housing 2. An upper valve ball 19 is rotatably installed inside the upper main valve housing 1, and an upper rotating rod 18 is fixedly installed on the outside of the upper valve ball 19. An upper rotating handle 5 is fixedly installed on the outside of the end of the upper rotating rod 18 away from the upper valve ball 19. The lower iodine valve includes a lower main valve housing 13, with a lower connecting housing 12 sealed at the top of the lower main valve housing 13. A sealing connecting plate 6 20 is fixedly installed at the top of the lower connecting housing 12, and a sealing connecting plate 4 is fixedly installed at the bottom of the lower main valve housing 13. 5.14. A lower valve ball 17 is rotatably installed inside the lower main valve housing 13. A lower rotating rod 16 is fixedly installed on the outside of the lower valve ball 17. A lower rotating handle 15 is fixedly installed on the outside of the end of the lower rotating rod 16 away from the lower valve ball 17. A sealing connecting plate 11 is fixedly installed on the top of the iodine transfer tank 10. A sealing connecting plate 4 is fixedly installed on the bottom of the iodine transfer tank 10. The end of the sealing connecting plate 11 away from the iodine transfer tank 10 is sealed and connected to the end of the sealing connecting plate 24 away from the upper connecting shell 2 by fastening bolts. The end of the sealing connecting plate 41 away from the iodine transfer tank 10 is sealed and connected to the end of the sealing connecting plate 620 away from the lower connecting shell 12 by fastening bolts.

[0019] The upper iodine valve can be connected to an external iodine addition pipe via sealing connection plate 36, and the lower iodine valve can be connected to the reaction vessel via sealing connection plate 514. The upper iodine valve can be connected to the iodine solution transfer tank 10 via sealing connection plate 24 and sealing connection plate 13, and the iodine solution transfer tank 10 can be connected to the lower iodine valve via sealing connection plate 411 and sealing connection plate 620. Rotating the upper rotary handle 5 causes the upper valve ball 19 to rotate inside the upper main valve housing 1 via the upper rotary rod 18, thus opening and closing the upper iodine valve. Rotating the lower rotary handle 15 causes the lower valve ball 17 to rotate inside the lower main valve housing 13 via the lower rotary rod 16, thus opening and closing the lower iodine valve.

[0020] Working principle: First, connect the upper iodine valve to the iodine pipe and the lower iodine valve to the reactor. The upper iodine valve can be connected to the external iodine pipe via sealing connection plate 3 (6), and the lower iodine valve can be connected to the reactor via sealing connection plate 5 (14). The upper iodine valve can be connected to the iodine solution transfer tank 10 via sealing connection plates 2 (4) and 1 (3), and the iodine solution transfer tank 10 can be connected to the lower iodine valve via sealing connection plates 4 (11) and 6 (20). Rotating the upper rotary handle 5 causes the upper valve ball 19 to rotate inside the upper main valve housing 1 via the upper rotary rod 18, thus opening and closing the upper iodine valve. Rotating the lower rotary handle 15 causes the lower valve ball 17 to rotate inside the lower main valve housing 13 via the lower rotary rod 16, thus opening and closing the lower iodine valve. The lower iodine valve is then connected to an external pressure regulating device via the external pressure regulating pipe 9. The gas inside the iodine transfer tank 10 is extracted through the pressure regulating external pipe 9, connecting box 8, and two connecting pipes 7, thereby reducing the pressure inside the iodine transfer tank 10. When iodine needs to be added, first open the upper iodine valve, and the iodine will enter the iodine transfer tank 10 all at once under the action of pressure difference. Then close the upper iodine valve, and inject gas into the iodine transfer tank 10 through the pressure regulating external pipe 9, connecting box 8, and two connecting pipes 7 via an external pressure regulating device, so that the pressure in the iodine transfer tank 10 increases. Then open the lower iodine valve, and the iodine inside the iodine transfer tank 10 will completely enter the reactor under the action of pressure difference, thus ensuring that two kilograms of iodine can be added at once without repeatedly opening and closing the upper and lower iodine valves, simplifying the operation, reducing labor intensity, and using pressure difference for iodine addition. This not only avoids the unorganized emission of harmful gases in the reactor, but also greatly reduces the risk of sudden iodine leakage, ensuring personal safety.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An iodine dosing device for the production of tetrachlorophthalic anhydride from chlorination reactors, comprising an upper iodine dosing valve, a lower iodine dosing valve, and an iodine solution transfer tank (10), characterized in that: The iodine transfer tank (10) is installed between the upper iodine valve and the lower iodine valve. Two connecting pipes (7) are connected to the outside of the iodine transfer tank (10). A connecting box (8) is connected to the end of each connecting pipe (7) away from the iodine transfer tank (10). A pressure regulating external pipe (9) is connected to the end of the connecting box (8) away from the connecting pipes (7). The upper iodine valve includes an upper main valve housing (1). An upper connecting shell (2) is sealed at the bottom of the upper main valve housing (1). A sealing connecting plate three (6) is fixedly installed at the top of the upper main valve housing (1). A sealing connecting plate two (4) is fixedly installed at the bottom of the upper connecting shell (2). An upper valve ball (19) is rotatably installed inside the upper main valve housing (1). The upper valve ball (19)... An upper rotating rod (18) is fixedly installed on the outside. An upper rotating handle (5) is fixedly installed on the outside of the upper rotating rod (18) away from the upper valve ball (19). The lower iodine valve includes a lower main valve shell (13). A lower connecting shell (12) is sealed on the top of the lower main valve shell (13). A sealing connecting plate six (20) is fixedly installed on the top of the lower connecting shell (12). A sealing connecting plate five (14) is fixedly installed on the bottom of the lower main valve shell (13). A lower valve ball (17) is rotatably installed inside the lower main valve shell (13). A lower rotating rod (16) is fixedly installed on the outside of the lower valve ball (17). A lower rotating handle (15) is fixedly installed on the outside of the lower rotating rod (16) away from the lower valve ball (17).

2. The iodine dosing apparatus for the tetrachlorophthalic anhydride chlorination reactor according to claim 1, characterized in that: The top of the iodine transfer tank (10) is fixedly equipped with a sealing connection plate 1 (3), and the bottom of the iodine transfer tank (10) is fixedly equipped with a sealing connection plate 4 (11).

3. The iodine dosing apparatus for the tetrachlorophthalic anhydride chlorination reactor according to claim 2, characterized in that: The end of the sealing connection plate one (3) away from the iodine transfer tank (10) is sealed and connected to the end of the sealing connection plate two (4) away from the upper connecting shell (2) by fastening bolts.

4. The iodine dosing apparatus for the tetrachlorophthalic anhydride chlorination reactor according to claim 3, characterized in that: The end of the sealing connection plate four (11) away from the iodine transfer tank (10) is sealed and connected to the end of the sealing connection plate six (20) away from the lower connecting shell (12) by fastening bolts.

Images