A chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride

Abstract

The present invention relates to the technical field of chemical chlorination kettles, and in particular to a chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride, comprising a chlorination kettle body, a sealed iodine addition mechanism, a precise discharge mechanism, and an encryption mechanism. The outer wall of the chlorination kettle body is connected to a feed pipe, the top outer wall of the feed pipe is connected to a second iodine addition valve, the top outer wall of the second iodine addition valve is connected to a volume expansion short pipe, and the top outer wall of the volume expansion short pipe is connected to a first iodine addition valve. The present invention can add iodine at one time while sealing the port of the feed pipe through the sealed iodine addition mechanism. The precise discharge mechanism pulls a pressing plate to shake off all iodine adhering to the inner wall of the feed pipe into a temporary storage tube before iodine addition. After iodine addition, a flapping plate is in an open state to collide with a resonance plate, further promoting the iodine in the temporary storage tube to fall into the chlorination kettle body. The linkage encryption mechanism can seal between the temporary storage tube and the feed pipe during iodine addition.

Description

Technical Field

[0001] The invention relates to the technical field of chemical chlorination kettles, in particular to a chlorination kettle for producing and processing chemical tetrachlorophthalic anhydride. Background Art

[0002] Tetrachlorophthalic anhydride (TETA) occurs as colorless, odorless needle-shaped crystals or powder. It is soluble in organic solvents such as dioxane but insoluble in cold water. Besides its primary use as a flame retardant, it is also widely used in the synthesis of polyesters and epoxy resins. It is also an essential intermediate in the synthesis of pesticides, dyes, synthetic pharmaceuticals, and plasticizers. Tetrachlorophthalic anhydride is primarily produced by the catalytic chlorination of phthalic anhydride in a solvent. It can also be produced by the oxidation of 3,4,5,6-tetrachloro-o-xylene. The chlorination of phthalic anhydride at high temperatures requires the use of a catalyst, such as iodine (or an iodine compound).

[0003] In the prior art, the iodine addition structure of the central control station chlorination kettle uses two valves stacked together. The iodine addition amount is 2kg per batch. Due to the limited space between the valves, the iodine cannot be added to the kettle all at once. The 2kg of iodine can only be fully released by repeatedly opening and closing the upper and lower valves. The operation process is cumbersome and risky, and there is a risk of unorganized gas emission from the kettle. Tetrachlorophthalic anhydride is toxic and irritating. There is even a phenomenon where iodine clumping and blockage between the valves can cause gas to burst out of the kettle during iodine addition, resulting in iodine loss and endangering the safety of operators. Therefore, a chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride was proposed to address the above-mentioned issues. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A chlorination kettle for producing and processing tetrachlorophthalic anhydride in the chemical industry, comprising a chlorination kettle body, wherein the outer wall of the chlorination kettle body is connected to a feed pipe, the top outer wall of the feed pipe is connected to a second iodine addition valve, the top outer wall of the second iodine addition valve is connected to a volume expansion short pipe, the top outer wall of the volume expansion short pipe is connected to a first iodine addition valve, the bottom outer wall of the feed pipe is connected to an arc-shaped shell, the inner wall of the arc-shaped shell is rotatably connected to a temporary storage cylinder, the inner wall of the feed pipe is rotatably connected to a first shaft, the end of the first shaft is fixedly connected to a disposable addition knob, and the inner wall of the first shaft is slidably connected to a translation push rod, and further comprising:

[0007] The sealed iodine adding mechanism can instantly seal the feed pipe when adding iodine, and add the iodine in the temporary storage cylinder into the chlorination kettle body at one time. The sealed iodine adding mechanism is installed on the feed pipe;

[0008] The precise discharging mechanism is used to cooperate with the movement of the first shaft to shake off all the iodine adhering to the inner wall of the feed pipe into the temporary storage cylinder before iodine addition, so as to prevent iodine from remaining on the inner wall of the temporary storage cylinder after iodine addition. The precise discharging mechanism is installed on the first shaft;

[0009] And an encryption mechanism is used to cooperate with the precise discharge mechanism, so that when adding iodine, the temporary storage cylinder and the feeding pipe can be sealed to avoid the gas in the kettle rushing out and thus losing iodine. The encryption mechanism is installed on the feeding pipe.

[0010] Preferably, the end of the first shaft is fixedly connected to a pressing plate, the outer wall of the first shaft is fixedly connected to a connecting plate, a plurality of first springs are fixedly connected between the connecting plate and the pressing plate, the outer wall of the first shaft is slidably connected to a fixing rod, the bottom of the fixing rod is fixedly connected to a mounting block, and the mounting block is fixedly connected to the arc-shaped shell.

[0011] Preferably, the sealed iodine adding mechanism includes a chain, an arc-shaped connecting plate, a first bearing, a transmission gear 1, a third shaft and a transmission gear 2, the arc-shaped connecting plate is fixedly connected to the first shaft, the first bearing is fixedly connected to the other end of the arc-shaped connecting plate, the first bearing is fixedly connected to the transmission gear 1, the third shaft is fixedly connected to the temporary storage tube, the transmission gear 2 is fixedly connected to the third shaft, and the chain is sleeved on the outer walls of the transmission gear 1 and the transmission gear 2.

[0012] Preferably, the precise discharging mechanism includes a second spring, a second fixed plate, a lower pressure plate and a double-angle push plate, the double-angle push plate is fixedly connected to the translation push rod, the lower pressure plate is slidingly connected to the mounting block, the second fixed plate is fixedly connected to the lower pressure plate, the second spring is fixedly connected between the mounting block and the second fixed plate, and the lower pressure plate is arranged below the double-angle push plate.

[0013] Preferably, the precise discharging mechanism also includes a slide, a fixed disc, two special-shaped slide grooves, two mounting seats 2 and four third springs. The fixed disc is fixedly connected to the outer wall of the third shaft rod, the two mounting seats 2 are symmetrically distributed and fixedly connected to the third shaft rod, the slide is slidably connected to the inner wall of the fixed disc, every two third springs are respectively fixedly connected between the mounting seat 2 and the slide, the two special-shaped slide grooves are symmetrically distributed and fixedly connected to the slide.

[0014] Preferably, the precise discharging mechanism also includes two translation slides, two racks, two flip gears, two second shafts and two flapping plates. The two translation slides are respectively slidably connected to the two special-shaped slide grooves, the two racks are respectively fixedly connected to the two translation slides, the two flip gears are respectively engaged with the two racks, the two second shafts are respectively fixedly connected to the two flip gears, the two second shafts are both rotatably connected to the temporary storage cylinder, and the two flapping plates are respectively fixedly connected to the two second shafts.

[0015] Preferably, the encryption mechanism includes two sealing strips, a pressure column, two connecting rods II, two encryption rods and two connecting blocks. The two connecting rods II are fixedly connected to both sides of the double-angle push plate. The two encryption rods are fixedly connected to the two connecting rods II respectively. The two connecting blocks are fixedly connected to the pressure column. The pressure column is slidingly connected to the inner wall of the material passage pipe. The bottom outer wall of the pressure column is fixedly connected to the sealing strip. The two connecting blocks are arranged below the two encryption rods.

[0016] Preferably, two resonance plates are fixedly connected to the outer wall of the arc-shaped shell, a bracket is fixedly connected to the outer wall of the arc-shaped shell, the transmission gear 2 is rotatably connected to the bracket through a set shaft, and sliding grooves are provided on the outer walls of both sides of the feeding pipe.

[0017] Compared with the existing technology, the chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride has the following benefits:

[0018] The present invention can add iodine at one time and seal the port of the feed pipe at the same time by means of a sealed iodine adding mechanism; the precise discharging mechanism pulls the pressing plate to shake off all the iodine adhering to the inner wall of the feed pipe into the temporary storage cylinder before adding iodine; after adding iodine, the flapping plate is in an open state to collide with the resonance plate, further promoting the iodine in the temporary storage cylinder to fall into the chlorination kettle body; the linkage encryption mechanism can seal the temporary storage cylinder and the feed pipe when adding iodine, thereby avoiding the unorganized emission of harmful gases in the kettle, greatly reducing the risk of iodine rushing out, and ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure inside the chlorination kettle body of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the arc-shaped shell of the present invention;

[0022] Figure 4 This invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 5 This invention Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle;

[0024] Figure 6 This is a schematic diagram of the internal structure of the arc-shaped housing of the present invention;

[0025] Figure 7 This invention Figure 6 A schematic diagram of the partially enlarged structure at point C in the middle;

[0026] Figure 8 This is a schematic diagram of the structure of the special-shaped chute of the present invention;

[0027] Figure 9 It is a schematic diagram of the internal structure of the fixed disc of the present invention;

[0028] Figure 10 It is a schematic diagram of the encryption mechanism structure of the present invention.

[0029] In the figure: 1. Chlorination kettle body; 2. First iodine dosing valve; 3. Capacity expansion short tube; 4. Second iodine dosing valve; 5. Feeding tube; 6. Disposable dosing knob; 7. Pressing plate; 8. First spring; 9. First shaft; 10. Arc-shaped shell; 11. Temporary storage cylinder; 12. Connecting plate; 13. Resonance plate; 14. Bracket; 15. Chain; 16. Mounting block; 17. Fixing rod; 18. Second spring; 19. Slapping plate; 20. Second fixing plate; 21. Second connecting rod; 22. Encryption rod; 23. Sliding groove; 24. Connecting block; 25. Arc-shaped connecting plate; 26. First bearing; 27. Lower pressure plate; 28. Transmission gear 1; 29. Translation push rod; 30. Double-angle push plate; 31. Sealing strip; 32. Second shaft; 33. Translation slide rod; 34. Slide; 35. Third shaft; 36. Rack; 37. Flip gear; 38. Transmission gear 2; 39. Pressure column; 40. Fixed disc; 41. Third spring; 42. Special-shaped slide; 43. Mounting seat 2; 101. Sealing and iodine-adding mechanism; 202. Precision discharging mechanism; 303. Encryption mechanism. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Reference Figures 1-10A chlorination kettle for producing and processing tetrachlorophthalic anhydride in a chemical industry, comprising a chlorination kettle body 1, wherein the outer wall of the chlorination kettle body 1 is connected to a feed pipe 5, the top outer wall of the feed pipe 5 is connected to a second iodine addition valve 4, the top outer wall of the second iodine addition valve 4 is connected to a volume expansion short tube 3, the top outer wall of the volume expansion short tube 3 is connected to a first iodine addition valve 2, the bottom outer wall of the feed pipe 5 is connected to an arc-shaped shell 10, the inner wall of the arc-shaped shell 10 is rotatably connected to a temporary storage cylinder 11, the inner wall of the feed pipe 5 is rotatably connected to a first shaft rod 9, the end of the first shaft rod 9 is fixedly connected to a disposable addition knob 6, and the inner wall of the first shaft rod 9 is slidably connected to a translation push rod 29, and further comprising:

[0033] The sealed iodine adding mechanism 101 can instantly seal the feed pipe 5 when adding iodine, and add the iodine in the temporary storage cylinder 11 into the chlorination kettle body 1 at one time. The sealed iodine adding mechanism 101 is installed on the feed pipe 5;

[0034] The precise discharge mechanism 202 is used to cooperate with the movement of the first shaft 9 to shake off all the iodine adhering to the inner wall of the feed pipe 5 into the temporary storage cylinder 11 before iodine addition, so as to prevent iodine from remaining on the inner wall of the temporary storage cylinder 11 after iodine addition. The precise discharge mechanism 202 is installed on the first shaft 9;

[0035] And the encryption mechanism 303 is used to cooperate with the precise discharge mechanism 202, so that the temporary storage cylinder 11 and the feeding pipe 5 can be sealed when iodine is added, to avoid the gas in the kettle rushing out and thus losing iodine. The encryption mechanism 303 is installed on the feeding pipe 5.

[0036] Among them, the end of the first shaft rod 9 is fixedly connected to the pressing plate 7, the outer wall of the first shaft rod 9 is fixedly connected to the connecting plate 12, a number of first springs 8 are fixedly connected between the connecting plate 12 and the pressing plate 7, the outer wall of the first shaft rod 9 is slidably connected to the fixing rod 17, the bottom of the fixing rod 17 is fixedly connected to the mounting block 16, and the mounting block 16 is fixedly connected to the arc-shaped shell 10.

[0037] Among them, the sealed iodine adding mechanism 101 includes a chain 15, an arc-shaped connecting plate 25, a first bearing 26, a transmission gear 1 28, a third shaft rod 35 and a transmission gear 2 38. The arc-shaped connecting plate 25 is fixedly connected to the first shaft rod 9, the first bearing 26 is fixedly connected to the other end of the arc-shaped connecting plate 25, the first bearing 26 is fixedly connected to the transmission gear 1 28, the third shaft rod 35 is fixedly connected to the temporary storage tube 11, the transmission gear 2 38 is fixedly connected to the third shaft rod 35, and the chain 15 is sleeved on the outer walls of the transmission gear 1 28 and the transmission gear 2 38.

[0038] Among them, the precise discharging mechanism 202 includes a second spring 18, a fixed plate 20, a lower pressure plate 27 and a double-angle push plate 30. The double-angle push plate 30 is fixedly connected to the translation push rod 29, the lower pressure plate 27 is slidingly connected to the mounting block 16, the fixed plate 20 is fixedly connected to the lower pressure plate 27, the second spring 18 is fixedly connected between the mounting block 16 and the fixed plate 20, and the lower pressure plate 27 is arranged below the double-angle push plate 30.

[0039] Among them, the precise discharging mechanism 202 also includes a slide 34, a fixed disc 40, two special-shaped slide grooves 42, two mounting seats 43 and four third springs 41. The fixed disc 40 is fixedly connected to the outer wall of the third shaft rod 35. The two mounting seats 43 are symmetrically distributed and fixedly connected to the third shaft rod 35. The slide 34 is slidingly connected to the inner wall of the fixed disc 40. Every two third springs 41 are respectively fixedly connected between the mounting seat 43 and the slide 34. The two special-shaped slide grooves 42 are symmetrically distributed and fixedly connected to the slide 34.

[0040] Among them, the precise discharging mechanism 202 also includes two translation slides 33, two racks 36, two flip gears 37, two second shafts 32 and two flapping plates 19. The two translation slides 33 are respectively slidably connected to the two special-shaped slide grooves 42, the two racks 36 are respectively fixedly connected to the two translation slides 33, the two flip gears 37 are respectively engaged with the two racks 36, the two second shafts 32 are respectively fixedly connected to the two flip gears 37, the two second shafts 32 are both rotatably connected to the temporary storage tube 11, and the two flapping plates 19 are respectively fixedly connected to the two second shafts 32.

[0041] In this embodiment, when in use, iodine enters the expansion short tube 3 through the first iodine adding valve 2, and the expansion short tube 3 has a fixed capacity. Then the first iodine adding valve 2 is closed and the expansion short tube 3 is opened. A certain amount of iodine enters the arc-shaped shell 10 and the temporary storage cylinder 11 through the feeding tube 5. The pressing plate 7 is pulled in the direction away from the disposable adding knob 6 until the side wall of the double-angle push plate 30 conflicts with the fixed rod 17, so that the pressing plate 7 drives the translation push rod 29 and the double-angle push plate 30 to move. The convex corner on one side of the double-angle push plate 30 squeezes the lower pressing plate 27, thereby causing the lower pressing plate 27 to move downward. 27 squeezes the slide 34, so that the slide 34 drives the special-shaped slide 42 to move downward, so that the translation slide 33 extends along the inclined surface of the special-shaped slide 42 and thus along the inner wall of the fixed disc 40, driving the flip gear 37 to rotate, so that the flip gear 37 drives the second shaft 32 and the two slapping plates 19 to rotate, and then the pressing plate 7 is reset, so that the slapping plate 19 is hit by the elastic force of the second spring 18 and the third spring 41 to the inner wall of the temporary storage tube 11, promoting the iodine on the inner wall of the capacity expansion short tube 3, the second iodine addition valve 4 and the feed pipe 5 to fall, so as to avoid errors in iodine addition.

[0042] Among them, the encryption mechanism 303 includes two sealing strips 31, a pressure column 39, two connecting rods 21, two encryption rods 22 and two connecting blocks 24. The two connecting rods 21 are fixedly connected to both sides of the double-angle push plate 30, and the two encryption rods 22 are fixedly connected to the two connecting rods 21 respectively. The two connecting blocks 24 are both fixedly connected to the pressure column 39. The pressure column 39 is slidingly connected to the inner wall of the material passage 5. The bottom outer wall of the pressure column 39 is fixedly connected to the sealing strip 31, and the two connecting blocks 24 are arranged below the two encryption rods 22.

[0043] Among them, two resonance plates 13 are fixedly connected to the outer wall of the arc-shaped shell 10, and a bracket 14 is fixedly connected to the outer wall of the arc-shaped shell 10. The transmission gear 2 38 is rotatably connected to the bracket 14 through a set shaft, and sliding grooves 23 are provided on the outer walls of both sides of the feeding pipe 5.

[0044] In this embodiment, the second iodine addition valve 4 is then closed, and the disposable addition knob 6 is rotated half a circle. The disposable addition knob 6 drives the first bearing 26 and the transmission gear 28 to rotate through the first shaft 9 and the arc-shaped connecting plate 25. The transmission gear 28 drives the chain 15 and the transmission gear 2 38 to rotate, thereby driving the third shaft 35 and the temporary storage tube 11 to rotate, causing the iodine in the temporary storage tube 11 to fall into the chlorination reactor body 1 at one time. At the same time, the outer wall of the temporary storage tube 11 closes the port of the feed pipe 5 to prevent gas from escaping.

[0045] Then, the pressing plate 7 is pushed in the direction close to the disposable adding knob 6, so that the pressing plate 7 drives the double-angle push plate 30 to move through the translation push rod 29, thereby driving the lower pressure plate 27 to move downward again. At this time, the movement of the double-angle push plate 30 drives the connecting block 24 to move downward through the connecting rod 21 and the encryption rod 22, so that the connecting block 24 drives the pressurizing column 39 and the sealing strip 31 to move downward, further strengthening the sealing of the port of the feed pipe 5. At this time, since the temporary storage cylinder 11 has been flipped half a circle, the slide 34 is squeezed by the lower pressure plate 27, so that the translation slide rod 33 moves along the other side of the special-shaped slide groove 42. At this time, the two flapping plates 19 are in an open state and collide with the resonance plate 13, further promoting the iodine in the temporary storage cylinder 11 to fall into the chlorination kettle body 1, and at the same time, the two continuously rotating flapping plates 19 push the surrounding gas to a position away from the feed pipe 5.

[0046] The specific working principle and use method of the present invention are explained in detail below: when in use, iodine enters the expansion short tube 3 through the first iodine adding valve 2, and the expansion short tube 3 has a fixed capacity. Then the first iodine adding valve 2 is closed and the expansion short tube 3 is opened. A certain amount of iodine enters the arc-shaped shell 10 and the temporary storage cylinder 11 through the feed pipe 5. The pressing plate 7 is pulled away from the disposable adding knob 6 until the side wall of the double-angle push plate 30 contacts the fixed rod 17, so that the pressing plate 7 drives the translation push rod 29 and the double-angle push plate 30 to move. The convex corner of one side of the double-angle push plate 30 squeezes the lower pressing plate 27, thereby making the lower The pressure plate 27 moves downward, and the lower pressure plate 27 squeezes the slide 34, so that the slide 34 drives the special-shaped slide 42 to move downward, so that the translation slide 33 extends along the inclined surface of the special-shaped slide 42 and thus along the inner wall of the fixed disc 40, driving the flip gear 37 to rotate, so that the flip gear 37 drives the second shaft 32 and the two slapping plates 19 to rotate, and then the pressing plate 7 is reset, so that the slapping plate 19 is subjected to the elastic force of the second spring 18 and the third spring 41 to knock the inner wall of the temporary storage tube 11, promoting the iodine on the inner wall of the capacity expansion short tube 3, the second iodine addition valve 4 and the feed pipe 5 to fall, thereby avoiding errors in iodine addition.

[0047] Then, the second iodine addition valve 4 is closed, and the disposable addition knob 6 is rotated half a circle. The disposable addition knob 6 drives the first bearing 26 and the transmission gear 1 28 to rotate through the first shaft 9 and the arc-shaped connecting plate 25. The transmission gear 1 28 drives the chain 15 and the transmission gear 2 38 to rotate, thereby driving the third shaft 35 and the temporary storage cylinder 11 to rotate, causing the iodine in the temporary storage cylinder 11 to fall into the chlorination kettle body 1 at one time. At the same time, the outer wall of the temporary storage cylinder 11 closes the port of the feed pipe 5 to prevent gas from escaping.

[0048] Then, the pressing plate 7 is pushed in the direction close to the disposable adding knob 6, so that the pressing plate 7 drives the double-angle push plate 30 to move through the translation push rod 29, thereby driving the lower pressure plate 27 to move downward again. At this time, the movement of the double-angle push plate 30 drives the connecting block 24 to move downward through the connecting rod 21 and the encryption rod 22, so that the connecting block 24 drives the pressurizing column 39 and the sealing strip 31 to move downward, further strengthening the sealing of the port of the feed pipe 5. At this time, since the temporary storage cylinder 11 has been flipped half a circle, the slide 34 is squeezed by the lower pressure plate 27, so that the translation slide rod 33 moves along the other side of the special-shaped slide groove 42. At this time, the two flapping plates 19 are in an open state and collide with the resonance plate 13, further promoting the iodine in the temporary storage cylinder 11 to fall into the chlorination kettle body 1, and at the same time, the two continuously rotating flapping plates 19 push the surrounding gas to a position away from the feed pipe 5.

[0049] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A chlorination kettle for producing and processing tetrachlorophthalic anhydride in a chemical industry, comprising a chlorination kettle body (1), wherein the outer wall of the chlorination kettle body (1) is connected to a feed pipe (5), the top outer wall of the feed pipe (5) is connected to a second iodine-adding valve (4), the top outer wall of the second iodine-adding valve (4) is connected to a volume expansion short tube (3), the top outer wall of the volume expansion short tube (3) is connected to a first iodine-adding valve (2), the bottom outer wall of the feed pipe (5) is connected to an arc-shaped shell (10), the inner wall of the arc-shaped shell (10) is rotatably connected to a temporary storage cylinder (11), the inner wall of the feed pipe (5) is rotatably connected to a first shaft (9), the end of the first shaft (9) is fixedly connected to a disposable adding knob (6), and the inner wall of the first shaft (9) is slidably connected to a translation push rod (29), characterized in that: Also includes: The sealing iodine adding mechanism (101) instantly seals the feed pipe (5) when adding iodine, and adds the iodine in the temporary storage cylinder (11) into the chlorination kettle body (1) at one time. The sealing iodine adding mechanism (101) is installed on the feed pipe (5); The sealing iodine adding mechanism (101) comprises a chain (15), an arc-shaped connecting plate (25), a first bearing (26), a transmission gear 1 (28), a third shaft (35) and a transmission gear 2 (38); The precise discharging mechanism (202) is used to cooperate with the movement of the first shaft (9) to shake off all the iodine adhering to the inner wall of the feed pipe (5) into the temporary storage cylinder (11) before adding iodine, and to prevent iodine from remaining on the inner wall of the temporary storage cylinder (11) after adding iodine. The precise discharging mechanism (202) is installed on the first shaft (9); The precise discharging mechanism (202) includes a second spring (18), a second fixed plate (20), a lower pressure plate (27) and a double-angle push plate (30), the precise discharging mechanism (202) also includes a slide (34), a fixed disc (40), two special-shaped slide grooves (42), two second mounting seats (43) and four third springs (41), the precise discharging mechanism (202) also includes two translation slide rods (33), two racks (36), two flip gears (37), two second shaft rods (32) and two slapping plates (19); and an encryption mechanism (303) for cooperating with the precise discharge mechanism (202) so as to seal the temporary storage cylinder (11) and the feed pipe (5) when adding iodine, thereby preventing the gas in the kettle from rushing out and thus losing iodine. The encryption mechanism (303) is installed on the feed pipe (5); The encryption mechanism (303) comprises two sealing strips (31), a pressurizing column (39), two connecting rods (21), two encryption rods (22) and two connecting blocks (24).

2. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The end of the first shaft (9) is fixedly connected to a pressing plate (7), the outer wall of the first shaft (9) is fixedly connected to a connecting plate (12), a plurality of first springs (8) are fixedly connected between the connecting plate (12) and the pressing plate (7), the outer wall of the first shaft (9) is slidably connected to a fixing rod (17), the bottom of the fixing rod (17) is fixedly connected to a mounting block (16), and the mounting block (16) is fixedly connected to the arc-shaped shell (10).

3. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The arc-shaped connecting plate (25) is fixedly connected to the first shaft (9), the first bearing (26) is fixedly connected to the other end of the arc-shaped connecting plate (25), the first bearing (26) is fixedly connected to the transmission gear 1 (28), the third shaft (35) is fixedly connected to the temporary storage cylinder (11), the transmission gear 2 (38) is fixedly connected to the third shaft (35), and the chain (15) is sleeved on the outer walls of the transmission gear 1 (28) and the transmission gear 2 (38).

4. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The double-angle push plate (30) is fixedly connected to the translation push rod (29), the lower pressure plate (27) is slidably connected to the mounting block (16), the second fixed plate (20) is fixedly connected to the lower pressure plate (27), the second spring (18) is fixedly connected between the mounting block (16) and the second fixed plate (20), and the lower pressure plate (27) is arranged below the double-angle push plate (30).

5. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The fixed disc (40) is fixedly connected to the outer wall of the third shaft (35), the two second mounting seats (43) are symmetrically distributed and fixedly connected to the third shaft (35), the slide (34) is slidably connected to the inner wall of the fixed disc (40), each two third springs (41) are respectively fixedly connected between the second mounting seat (43) and the slide (34), and the two special-shaped slide grooves (42) are symmetrically distributed and fixedly connected to the slide (34).

6. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The two translation slide bars (33) are respectively slidably connected to the two special-shaped slide grooves (42), the two racks (36) are respectively fixedly connected to the two translation slide bars (33), the two flip gears (37) are respectively engaged with the two racks (36), the two second shafts (32) are respectively fixedly connected to the two flip gears (37), the two second shafts (32) are both rotationally connected to the temporary storage cylinder (11), and the two flapping plates (19) are respectively fixedly connected to the two second shafts (32).

7. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: The two connecting rods (21) are fixedly connected to both sides of the double-angle push plate (30), the two encryption rods (22) are fixedly connected to the two connecting rods (21) respectively, the two connecting blocks (24) are fixedly connected to the pressure column (39), the pressure column (39) is slidably connected to the inner wall of the feed pipe (5), the bottom outer wall of the pressure column (39) is fixedly connected to the sealing strip (31), and the two connecting blocks (24) are arranged below the two encryption rods (22).

8. A chlorination kettle for producing and processing tetrachlorophthalic anhydride according to claim 1, characterized in that: Two resonance plates (13) are fixedly connected to the outer wall of the arc-shaped shell (10), a bracket (14) is fixedly connected to the outer wall of the arc-shaped shell (10), the second transmission gear (38) is rotatably connected to the bracket (14) via a shaft, and sliding grooves (23) are provided on the outer walls of both sides of the feed pipe (5).

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