Chlorination kettle for producing and processing chemical tetrachlorophthalic anhydride

Abstract

The invention relates to the technical field of chemical chlorination kettles, in particular to a chemical tetrachlorophthalic anhydride production and processing chlorination kettle which comprises a chlorination kettle body, a sealed iodizing mechanism, a precise discharging mechanism and a sealing mechanism, the outer wall of the chlorination kettle body is communicated with a material passing pipe, and the outer wall of the top of the material passing pipe is communicated with a second iodizing valve; the outer wall of the top of the second iodizing valve is communicated with a capacity-increasing short pipe, and the outer wall of the top of the capacity-increasing short pipe is communicated with a first iodizing valve. According to the iodine adding device, one-time iodine adding can be achieved through the sealing iodine adding mechanism, meanwhile, a port of a material passing pipe is sealed, a pressing disc is pulled through an accurate discharging mechanism, iodine adhering to the inner wall of the material passing pipe can be shaken off into a temporary storage barrel before iodine adding, and after iodine adding, a beating plate is in an open state and collides with a resonance plate; the iodine in the temporary storage barrel is further promoted to fall into the chlorination kettle body, and the linkage encryption mechanism can seal the temporary storage barrel and the material passing pipe during iodine adding.

Description

Technical Field

[0001] 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. Background Art

[0002] Tetrachlorophthalic anhydride is a colorless, odorless needle-like crystal or powder, soluble in organic solvents such as dioxane, insoluble in cold water. In addition to being mainly used as a flame retardant, it is also widely used in the synthesis of polyesters and epoxy resins. At the same time, it is an essential important intermediate compound in the synthesis of pesticides, dyes, synthetic drugs, and plasticizers. Tetrachlorophthalic anhydride is mainly prepared by catalytic chlorination of phthalic anhydride in a solvent, or can also be prepared by oxidizing 3,4,5,6-tetrachloro-o-xylene. Under high-temperature conditions, the chlorination reaction of phthalic anhydride needs to be carried out under the catalysis of a catalyst, for example, using iodine (or iodine compounds) as a catalyst.

[0003] In the prior art: The iodine addition structure of the chlorination kettle in the central control position is in the form of two valves stacked. The amount of iodine added per batch is 2 kg. Due to the limited space between the valves, all the iodine cannot be added into the kettle at one time. Only by repeatedly opening and closing the upper and lower valves can 2 kg of iodine all fall into the kettle. The operation process is cumbersome and risky, and there is also the situation of unorganized emission of gas in the kettle. Tetrachlorophthalic anhydride has certain toxicity and irritation. Even the phenomenon occurs that the iodine caking between the valve bodies blocks the iodine addition, resulting in the gas in the kettle rushing out during iodine addition, thus losing iodine and endangering the safety of operators. Therefore, a chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride is proposed to solve the above problems. Summary of the Invention

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

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme: A chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride, including a chlorination kettle body. The outer wall of the chlorination kettle body is communicated with a feeding pipe. The top outer wall of the feeding pipe is communicated with a second iodine addition valve. The top outer wall of the second iodine addition valve is communicated with an expansion short pipe. The top outer wall of the expansion short pipe is communicated with a first iodine addition valve. The bottom outer wall of the feeding pipe is communicated with an arc-shaped shell. The inner wall of the arc-shaped shell is rotatably connected with a temporary storage cylinder. The inner wall of the feeding pipe is rotatably connected with a first shaft rod. The end of the first shaft rod is fixedly connected with a one-time addition knob. A translation push rod is slidably connected to the inner wall of the first shaft rod. It further includes: A sealed iodine addition mechanism, which can instantaneously seal the feeding pipe during iodine addition and add the iodine in the temporary storage cylinder into the chlorination kettle body at one time. The sealed iodine addition mechanism is installed on the feeding pipe; A precise discharging mechanism, which is used to cooperate with the movement of the first shaft rod to shake all the iodine adhered to the inner wall of the material passing pipe into the temporary storage cylinder before iodine addition, and can avoid iodine remaining on the inner wall of the temporary storage cylinder after iodine addition. The precise discharging mechanism is installed on the first shaft rod; And an encryption mechanism, which is used to cooperate with the precise discharging mechanism to seal between the temporary storage cylinder and the material passing pipe during iodine addition, so as to avoid the phenomenon that the gas in the kettle rushes out and iodine is lost. The encryption mechanism is installed on the material passing pipe.

[0006] Preferably, a pressing disc is fixedly connected to the end of the first shaft rod, a connecting disc is fixedly connected to the outer wall of the first shaft rod, a plurality of first springs are fixedly connected between the connecting disc and the pressing disc, a fixing rod is slidably connected to the outer wall of the first shaft rod, an installation block is fixedly connected to the bottom of the fixing rod, and the installation block is fixedly connected to the arc-shaped shell.

[0007] Preferably, the sealed iodine addition mechanism includes a chain, an arc-shaped connecting plate, a first bearing, a transmission gear one, a third shaft rod and a transmission gear two. The arc-shaped connecting plate is fixedly connected to the first shaft rod, 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 one, the third shaft rod is fixedly connected to the temporary storage cylinder, the transmission gear two is fixedly connected to the third shaft rod, and the chain is sleeved on the outer walls of the transmission gear one and the transmission gear two.

[0008] Preferably, the precise discharging mechanism includes a second spring, a fixing plate two, a lower pressing plate and a double-angle pushing plate. The double-angle pushing plate is fixedly connected to the translation push rod, the lower pressing plate is slidably connected to the installation block, the fixing plate two is fixedly connected to the lower pressing plate, the second spring is fixedly connected between the installation block and the fixing plate two, and the lower pressing plate is arranged below the double-angle pushing plate.

[0009] Preferably, the precise discharging mechanism further includes a sliding frame, a fixed disc, two special-shaped sliding grooves, two installation seats two and four third springs. The fixed disc is fixedly connected to the outer wall of the third shaft rod, the two installation seats two are symmetrically distributed and fixedly connected to the third shaft rod, the sliding frame is slidably connected to the inner wall of the fixed disc, every two third springs are respectively fixedly connected between the installation seat two and the sliding frame, and the two special-shaped sliding grooves are symmetrically distributed and fixedly connected to the sliding frame.

[0010] Preferably, the precise discharging mechanism further includes two translation sliding rods, two racks, two flipping gears, two second shaft rods and two beating plates. The two translation sliding rods are respectively slidably connected to the two special-shaped sliding grooves, the two racks are respectively fixedly connected to the two translation sliding rods, the two flipping gears are respectively meshed with the two racks, the two second shaft rods are respectively fixedly connected to the two flipping gears, the two second shaft rods are both rotatably connected to the temporary storage cylinder, and the two beating plates are respectively fixedly connected to the two second shaft rods.

[0011] 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 respectively fixedly connected to the two connecting rods II, the two connecting blocks are both fixedly connected to the pressure column, the pressure column is slidingly connected to the inner wall of the material passing pipe, the bottom outer wall of the pressure column is fixedly connected to the sealing strip, and the two connecting blocks are arranged below the two encryption rods.

[0012] 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 via a shaft, and sliding grooves are provided on both side outer walls of the feed pipe.

[0013] Compared with the existing technology, the chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride has the following benefits: The present invention can add iodine at one time and seal the port of the feed pipe at the same time through the sealed iodine adding mechanism; the precise discharging mechanism can pull the pressing plate to shake all the iodine adhering to the inner wall of the feed pipe into the temporary storage cylinder before adding iodine; after adding iodine, the slapping plate is in an open state to collide with the resonance plate, which further promotes 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

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the chlorination kettle body of the present invention; Figure 3 It is a structural schematic diagram of the arc-shaped housing of the present invention; Figure 4 The present invention Figure 3 A schematic diagram of the partially enlarged structure at center A; Figure 5 The present invention Figure 3 A schematic diagram of the partially enlarged structure at B in the middle; Figure 6 It is a schematic diagram of the internal structure of the arc-shaped housing of the present invention; Figure 7 The present invention Figure 6 A schematic diagram of the partially enlarged structure at C in the middle; Figure 8 This is a schematic diagram of the structure of the special-shaped chute of the present invention; Figure 9 It is a schematic diagram of the internal structure of the fixed disc of the present invention; Figure 10It is a schematic structural diagram of the encryption mechanism of the present invention.

[0015] In the figure: 1, the main body of the chlorination kettle; 2, the first iodine addition valve; 3, the capacity-increasing short pipe; 4, the second iodine addition valve; 5, the material-passing pipe; 6, the one-time addition knob; 7, the pressing disc; 8, the first spring; 9, the first shaft rod; 10, the arc-shaped shell; 11, the temporary storage cylinder; 12, the connecting disc; 13, the resonance plate; 14, the bracket; 15, the chain; 16, the mounting block; 17, the fixing rod; 18, the second spring; 19, the flapping plate; 20, the second fixing plate; 21, the second connecting rod; 22, the encryption rod; 23, the sliding groove; 24, the connecting block; 25, the arc-shaped connecting plate; 26, the first bearing; 27, the lower pressing plate; 28, the first transmission gear; 29, the translation push rod; 30, the double-angle push plate; 31, the sealing strip; 32, the second shaft rod; 33, the translation slide rod; 34, the sliding frame; 35, the third shaft rod; 36, the rack; 37, the flipping gear; 38, the second transmission gear; 39, the pressing column; 40, the fixed disc; 41, the third spring; 42, the special-shaped sliding groove; 43, the second mounting seat; 101, the sealed iodine addition mechanism; 202, the precise discharging mechanism; 303, the encryption mechanism. Detailed implementation mode

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] Refer to Figures 1-10 , a chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride, including the main body 1 of the chlorination kettle, the outer wall of the main body 1 of the chlorination kettle is communicated with a material-passing pipe 5, the top outer wall of the material-passing pipe 5 is communicated with a second iodine addition valve 4, the top outer wall of the second iodine addition valve 4 is communicated with a capacity-increasing short pipe 3, the top outer wall of the capacity-increasing short pipe 3 is communicated with a first iodine addition valve 2, the bottom outer wall of the material-passing pipe 5 is communicated with an arc-shaped shell 10, the inner wall of the arc-shaped shell 10 is rotatably connected with a temporary storage cylinder 11, the inner wall of the material-passing pipe 5 is rotatably connected with a first shaft rod 9, the end of the first shaft rod 9 is fixedly connected with a one-time addition knob 6, and a translation push rod 29 is slidably connected to the inner wall of the first shaft rod 9. It also includes: The sealed iodine addition mechanism 101 can instantaneously seal the material feeding pipe 5 during iodine addition and add the iodine in the temporary storage cylinder 11 into the chlorination kettle body 1 at one time. The sealed iodine addition mechanism 101 is installed on the material feeding pipe 5; The precise discharging mechanism 202 is used to cooperate with the movement of the first shaft rod 9 to shake all the iodine adhering to the inner wall of the material feeding pipe 5 into the temporary storage cylinder 11 before iodine addition, and can avoid iodine remaining on the inner wall of the temporary storage cylinder 11 after iodine addition. The precise discharging mechanism 202 is installed on the first shaft rod 9; And the sealing mechanism 303 is used to cooperate with the precise discharging mechanism 202 to seal between the temporary storage cylinder 11 and the material feeding pipe 5 during iodine addition, avoiding the phenomenon that the gas in the kettle rushes out and iodine is lost. The sealing mechanism 303 is installed on the material feeding pipe 5.

[0019] Among them, a pressing disc 7 is fixedly connected to the end of the first shaft rod 9, a connecting disc 12 is fixedly connected to the outer wall of the first shaft rod 9, several first springs 8 are fixedly connected between the connecting disc 12 and the pressing disc 7, a fixing rod 17 is slidably connected to the outer wall of the first shaft rod 9, a mounting block 16 is fixedly connected to the bottom of the fixing rod 17, and the mounting block 16 is fixedly connected to the arc-shaped housing 10.

[0020] Among them, the sealed iodine addition mechanism 101 includes a chain 15, an arc-shaped connecting plate 25, a first bearing 26, a first transmission gear 28, a third shaft rod 35 and a second transmission gear 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 first transmission gear 28, the third shaft rod 35 is fixedly connected to the temporary storage cylinder 11, the second transmission gear 38 is fixedly connected to the third shaft rod 35, and the chain 15 is sleeved on the outer walls of the first transmission gear 28 and the second transmission gear 38.

[0021] Among them, the precise discharging mechanism 202 includes a second spring 18, a second fixing plate 20, a lower pressing plate 27 and a double-angle pushing plate 30. The double-angle pushing plate 30 is fixedly connected to the translation push rod 29, the lower pressing plate 27 is slidably connected to the mounting block 16, the second fixing plate 20 is fixedly connected to the lower pressing plate 27, the second spring 18 is fixedly connected between the mounting block 16 and the second fixing plate 20, and the lower pressing plate 27 is arranged below the double-angle pushing plate 30.

[0022] Among them, the precise discharging mechanism 202 further includes a sliding frame 34, a fixed disc 40, two special-shaped sliding grooves 42, two second 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 second mounting seats 43 are symmetrically distributed and fixedly connected to the third shaft rod 35, the sliding frame 34 is slidably connected to the inner wall of the fixed disc 40, every two third springs 41 are respectively fixedly connected between the second mounting seats 43 and the sliding frame 34, and the two special-shaped sliding grooves 42 are symmetrically distributed and fixedly connected to the sliding frame 34.

[0023] Among them, the precise material arranging mechanism 202 further includes two translation sliding rods 33, two racks 36, two flipping gears 37, two second shaft rods 32 and two flapping plates 19. The two translation sliding rods 33 are respectively slidably connected to the two special-shaped sliding grooves 42. The two racks 36 are respectively fixedly connected to the two translation sliding rods 33. The two flipping gears 37 are respectively meshed with the two racks 36. The two second shaft rods 32 are respectively fixedly connected to the two flipping gears 37. The two second shaft rods 32 are both rotatably connected to the temporary storage cylinder 11. The two flapping plates 19 are respectively fixedly connected to the two second shaft rods 32.

[0024] In this implementation scheme, during use, iodine enters the capacity increasing short tube 3 through the first iodine adding valve 2. The capacity increasing short tube 3 has a fixed capacity. Then, the first iodine adding valve 2 is closed and the capacity increasing short tube 3 is opened. The quantified iodine enters the arc-shaped housing 10 and the temporary storage cylinder 11 through the material passing tube 5. Pull the pressing disc 7 in the direction away from the disposable adding knob 6 until the side wall of the double-angle push plate 30 abuts against the fixed rod 17, so that the pressing disc 7 drives the translation push rod 29 and the double-angle push plate 30 to move. One convex angle of the double-angle push plate 30 presses the lower pressing plate 27, so that the lower pressing plate 27 moves downward. The lower pressing plate 27 presses the sliding frame 34, so that the sliding frame 34 drives the special-shaped sliding groove 42 to move downward, so that the translation sliding rod 33 extends out along the inclined surface of the special-shaped sliding groove 42 and then along the inner wall of the fixed disc 40, driving the flipping gear 37 to rotate, so that the flipping gear 37 drives the second shaft rod 32 and the two flapping plates 19 to rotate. Then, the pressing disc 7 is reset, so that the flapping plate 19 is knocked against the inner wall of the temporary storage cylinder 11 by the elastic forces of the second spring 18 and the third spring 41, promoting the iodine on the inner walls of the capacity increasing short tube 3, the second iodine adding valve 4 and the material passing tube 5 to fall, and avoiding iodine adding errors.

[0025] Among them, the encryption mechanism 303 includes two sealing rubber strips 31, a pressing column 39, two second connecting rods 21, two encryption rods 22 and two connecting blocks 24. The two second connecting rods 21 are fixedly connected to both sides of the double-angle push plate 30. The two encryption rods 22 are respectively fixedly connected to the two second connecting rods 21. The two connecting blocks 24 are both fixedly connected to the pressing column 39. The pressing column 39 is slidably connected to the inner wall of the material passing tube 5. The outer wall of the bottom of the pressing column 39 is fixedly connected to the sealing rubber strip 31. The two connecting blocks 24 are arranged below the two encryption rods 22.

[0026] Among them, two resonance plates 13 are fixedly connected to the outer wall of the arc-shaped housing 10. A bracket 14 is fixedly connected to the outer wall of the arc-shaped housing 10. The transmission gear two 38 is rotatably connected to the bracket 14 through the arranged shaft rod. Sliding grooves 23 are opened on both outer walls of the material passing tube 5.

[0027] In this implementation, the second iodine addition valve 4 is then closed, and the one-time addition knob 6 is rotated half a turn. The one-time addition knob 6 drives the first bearing 26 and the first transmission gear 28 to rotate through the first shaft rod 9 and the arc-shaped connecting plate 25. The first transmission gear 28 drives the chain 15 and the second transmission gear 38 to rotate, thereby driving the third shaft rod 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 seals the port of the material feeding pipe 5 to prevent gas from escaping.

[0028] Then, the pressing plate 7 is pushed in the direction close to the one-time addition 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 pressing 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 second connecting rod 21 and the encryption rod 22, so that the connecting block 24 drives the pressing column 39 and the sealing strip 31 to move downward, further strengthening the seal of the port of the material feeding pipe 5. At this time, since the temporary storage cylinder 11 has been flipped half a turn, the carriage 34 is squeezed by the lower pressing plate 27 at this time, so that the translation sliding rod 33 moves along the other side of the special-shaped chute 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. At the same time, the continuously rotating two flapping plates 19 push the surrounding gas to a position away from the material feeding pipe 5.

[0029] The following makes a detailed explanation of the specific working principle and usage method of the present invention: During use, iodine enters the capacity increasing short pipe 3 through the first iodine addition valve 2. The capacity increasing short pipe 3 has a fixed capacity. Then, the first iodine addition valve 2 is closed and the capacity increasing short pipe 3 is opened. The quantified iodine enters the arc-shaped housing 10 and the temporary storage cylinder 11 through the material feeding pipe 5. The pressing plate 7 is pulled in the direction away from the one-time addition knob 6 until the side wall of the double-angle push plate 30 abuts against 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. One convex angle on one side of the double-angle push plate 30 squeezes the lower pressing plate 27, so that the lower pressing plate 27 moves downward. The lower pressing plate 27 squeezes the carriage 34, so that the carriage 34 drives the special-shaped chute 42 to move downward, so that the translation sliding rod 33 extends along the inclined surface of the special-shaped chute 42 and then along the inner wall of the fixed disc 40, driving the flipping gear 37 to rotate, so that the flipping gear 37 drives the second shaft rod 32 and the two flapping plates 19 to rotate. Then, the pressing plate 7 is reset, so that the flapping plates 19 are knocked against the inner wall of the temporary storage cylinder 11 by the elastic force of the second spring 18 and the third spring 41, promoting the iodine on the inner walls of the capacity increasing short pipe 3, the second iodine addition valve 4 and the material feeding pipe 5 to fall, and avoiding iodine addition errors.

[0030] Subsequently, close the second iodine addition valve 4, and rotate the one-time addition knob 6 half a turn. The one-time addition knob 6 drives the first bearing 26 and the first transmission gear 28 to rotate through the first shaft rod 9 and the arc-shaped connecting plate 25. The first transmission gear 28 drives the chain 15 and the second transmission gear 38 to rotate, thereby driving the third shaft rod 35 and the temporary storage cylinder 11 to rotate, prompting 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 material feeding pipe 5 to prevent gas from escaping.

[0031] Then, push the pressing disc 7 in the direction close to the one-time addition knob 6, so that the pressing disc 7 drives the double-angle push plate 30 to move through the translation push rod 29, thereby driving the lower pressing 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 second connecting rod 21 and the encryption rod 22, so that the connecting block 24 drives the pressure column 39 and the sealing strip 31 to move downward, further strengthening the seal of the port of the material feeding pipe 5. At this time, since the temporary storage cylinder 11 has been turned over half a turn, the carriage 34 is squeezed by the lower pressing plate 27, so that the translation sliding rod 33 moves along the other side of the special-shaped sliding 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. At the same time, the continuously rotating two flapping plates 19 push the surrounding gas to a position away from the material feeding pipe 5.

[0032] Further explanation: For the above fixed connection, unless otherwise clearly specified and limited, it should be understood in a broad sense. For example, it can be welding, gluing, or integrally formed setting, etc., which are common means well-known to those skilled in the art.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A chlorination kettle for the production and processing of chemical tetrachlorophthalic anhydride, comprising a chlorination kettle body (1), an outer wall of the chlorination kettle body (1) is communicated with a material feeding pipe (5), a top outer wall of the material feeding pipe (5) is communicated with a second iodine addition valve (4), a top outer wall of the second iodine addition valve (4) is communicated with an expansion short pipe (3), a top outer wall of the expansion short pipe (3) is communicated with a first iodine addition valve (2), a bottom outer wall of the material feeding pipe (5) is communicated with an arc-shaped shell (10), an inner wall of the arc-shaped shell (10) is rotatably connected with a temporary storage cylinder (11), an inner wall of the material feeding pipe (5) is rotatably connected with a first shaft rod (9), an end of the first shaft rod (9) is fixedly connected with a one-time addition knob (6), a translation push rod (29) is slidably connected to an inner wall of the first shaft rod (9), characterized in that, It also includes: A sealed iodine addition mechanism (101) that can instantaneously seal the material feeding pipe (5) during iodine addition and add the iodine in the temporary storage cylinder (11) into the chlorination kettle body (1) at one time. The sealed iodine addition mechanism (101) is installed on the material feeding pipe (5); A precise discharging mechanism (202) that is used to cooperate with the movement of the first shaft rod (9) to shake all the iodine adhered to the inner wall of the material feeding pipe (5) into the temporary storage cylinder (11) before iodine addition and can avoid iodine remaining on the inner wall of the temporary storage cylinder (11) after iodine addition. The precise discharging mechanism (202) is installed on the first shaft rod (9); And a sealing mechanism (303) that is used to cooperate with the precise discharging mechanism (202) to seal between the temporary storage cylinder (11) and the material feeding pipe (5) during iodine addition, avoiding the phenomenon that the gas in the kettle rushes out and iodine is lost. The sealing mechanism (303) is installed on the material feeding pipe (5).

2. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 1, characterized in that: A pressing disk (7) is fixedly connected to the end of the first shaft rod (9), a connecting disk (12) is fixedly connected to the outer wall of the first shaft rod (9), a plurality of first springs (8) are fixedly connected between the connecting disk (12) and the pressing disk (7), a fixing rod (17) is slidably connected to the outer wall of the first shaft rod (9), 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 housing (10).

3. The chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 2, characterized in that: The sealed iodine addition mechanism (101) includes a chain (15), an arc-shaped connecting plate (25), a first bearing (26), a first transmission gear (28), a third shaft rod (35) and a second transmission gear (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 first transmission gear (28), the third shaft rod (35) is fixedly connected to the temporary storage cylinder (11), the second transmission gear (38) is fixedly connected to the third shaft rod (35), and the chain (15) is sleeved on the outer walls of the first transmission gear (28) and the second transmission gear (38).

4. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 3, characterized in that: The precise discharging mechanism (202) includes a second spring (18), a second fixing plate (20), a lower pressing plate (27) and a double-angle pushing plate (30). The double-angle pushing plate (30) is fixedly connected to the translation push rod (29), the lower pressing plate (27) is slidably connected to the mounting block (16), the second fixing plate (20) is fixedly connected to the lower pressing plate (27), the second spring (18) is fixedly connected between the mounting block (16) and the second fixing plate (20), and the lower pressing plate (27) is arranged below the double-angle pushing plate (30).

5. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 4, characterized in that: The precise material discharging mechanism (202) further includes a carriage (34), a fixed disk (40), two special-shaped sliding grooves (42), two second mounting seats (43) and four third springs (41). The fixed disk (40) is fixedly connected to the outer wall of the third shaft rod (35). The two second mounting seats (43) are symmetrically distributed and fixedly connected to the third shaft rod (35). The carriage (34) is slidably connected to the inner wall of the fixed disk (40). Every two third springs (41) are respectively fixedly connected between the second mounting seat (43) and the carriage (34). The two special-shaped sliding grooves (42) are symmetrically distributed and fixedly connected to the carriage (34).

6. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 5, characterized in that: The precise material discharging mechanism (202) further includes two translation sliding rods (33), two racks (36), two flipping gears (37), two second shaft rods (32) and two flapping plates (19). The two translation sliding rods (33) are respectively slidably connected to the two special-shaped sliding grooves (42). The two racks (36) are respectively fixedly connected to the two translation sliding rods (33). The two flipping gears (37) are respectively meshed with the two racks (36). The two second shaft rods (32) are respectively fixedly connected to the two flipping gears (37). The two second shaft rods (32) are both rotatably connected to the temporary storage cylinder (11). The two flapping plates (19) are respectively fixedly connected to the two second shaft rods (32).

7. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 6, characterized in that: The encryption mechanism (303) includes two sealing rubber strips (31), a pressure column (39), two second connecting rods (21), two encryption rods (22) and two connecting blocks (24). The two second connecting rods (21) are fixedly connected to both sides of the double-angle push plate (30). The two encryption rods (22) are respectively fixedly connected to the two second connecting rods (21). The two connecting blocks (24) are both fixedly connected to the pressure column (39). The pressure column (39) is slidably connected to the inner wall of the material passing pipe (5). The bottom outer wall of the pressure column (39) is fixedly connected to the sealing rubber strip (31). The two connecting blocks (24) are arranged below the two encryption rods (22).

8. A chlorination kettle for the production and processing of chemical industrial tetrachlorophthalic anhydride according to claim 3, characterized in that: Two resonance plates (13) are fixedly connected to the outer wall of the arc-shaped housing (10). A bracket (14) is fixedly connected to the outer wall of the arc-shaped housing (10). The transmission gear two (38) is rotatably connected to the bracket (14) through a provided shaft rod. Sliding grooves (23) are formed on both outer walls of the material passing pipe (5).

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