A reaction kettle for producing mesotrione raw material

Abstract

The present application relates to the technical field of mesotrione raw material production, and particularly relates to a reaction kettle for mesotrione raw material production, which comprises a reaction kettle body, an outer ring surface of the reaction kettle body is rotationally sleeved with a treatment column, an outer surface of the treatment column is rotationally sleeved with a fixed outer cylinder, an upper end of the fixed outer cylinder is fixed to an outer ring surface of the reaction kettle body, an outer circumferential surface of the treatment column is provided with an annular treatment groove, a power structure is connected to an upper end of the treatment column, the power structure is installed on an outer surface of the reaction kettle body, an upper end of the reaction kettle body is fixedly connected with a gas extraction pump, an outer surface of the fixed outer cylinder is fixed with a fixed cover plate, and a separation structure is slidably inserted into the annular treatment groove. The present application can set the annular treatment groove, the separation structure and the venting box, because the separation structure is inserted into the annular treatment groove, the gas can only move around the annular treatment groove once and then be discharged from the venting box on the other side of the separation structure, so that the moving path of the gas in the annular treatment groove is increased.

Description

Technical Field

[0001] This invention relates to the technical field of nicosulfuron raw material production, and in particular to a reaction vessel for nicosulfuron raw material production. Background Technology

[0002] Mesotrione is a broad-spectrum selective pre-emergence and post-emergence herbicide that can inhibit hydroxyphenyl pyruvate dioxygenase (HPPD). It can effectively control major broadleaf weeds and some grass weeds. Mesotrione production equipment includes: chlorination kettle, synthesis kettle and downstream post-processing, drying, crushing and other related supporting equipment.

[0003] The reactor is one of the important reaction equipment in the production of nicosulfuron raw materials. When the raw materials are produced in the reactor, polluting gases are generated. In order to prevent direct emission and environmental pollution, the polluting gases are purified by passing through the absorbent liquid. However, the polluting gases generated in the existing reactors have a short time to pass through the absorbent liquid, resulting in insufficient absorption of the polluting gases and still polluting the environment after emission. Therefore, a reactor for the production of nicosulfuron raw materials is proposed. Summary of the Invention

[0004] To prevent incomplete absorption due to short contact time between polluting gases and the absorbent liquid, this invention provides a reaction vessel for the production of nicosulfuron raw materials.

[0005] This invention provides a reaction vessel for the production of nicosulfuron-methyl raw material, employing the following technical solution: It includes a reaction vessel body, a processing column rotatably sleeved on the outer circumference of the reaction vessel body, a fixed outer cylinder rotatably sleeved on the outer surface of the processing column, the upper end of the fixed outer cylinder being fixed to the outer circumference of the reaction vessel body, an annular processing groove formed on the outer circumference of the processing column, a power structure connected to the upper end of the processing column, the power structure being installed on the outer surface of the reaction vessel body, a vacuum pump fixedly connected to the upper end of the reaction vessel body, a fixed cover plate fixed to the outer surface of the fixed outer cylinder, a partition structure slidably inserted inside the annular processing groove, three vertical grooves formed on the outer circumference of the fixed outer cylinder, the middle vertical groove slidably sleeved on the outer surface of the partition structure, and three through vertical grooves formed on the side of the fixed cover plate away from the axis of the reaction vessel body, the three vertical grooves respectively connecting to three vertical... The tanks are connected, and two vent boxes are fixed on the side of the fixed cover away from the fixed outer cylinder. The middle vertical tank is slidably fitted onto the outer surface of the partition structure. The other two vertical tanks are connected to the two vent boxes respectively. The outlet of the vacuum pump is fixedly connected to one of the vent boxes. The upper surface of the treatment column is a concave structure. A liquid supply structure is rotatably inserted into the concave structure of the treatment column. The other end of the liquid supply structure is connected to the fixed outer cylinder. The bottom wall of the concave structure of the treatment column has multiple liquid passage holes that communicate with the annular treatment tank. A collection ring cylinder is set below the treatment column. The collection ring cylinder is fixedly fitted onto the outer surface of the reactor body. A ring plate is rotatably inserted into the upper surface of the collection ring cylinder. A liquid outlet structure is fixedly inserted into the upper surface of the ring plate. The upper end of the liquid outlet structure is fixedly inserted through the bottom surface of the treatment column. The upper end of the liquid outlet structure is connected to the interior of the annular treatment tank.

[0006] Optionally, the power structure includes an electric motor, a driving gear, and a driven gear ring. The lower end of the driven gear ring is fixed to the upper end of the processing column. The driving gear meshes with the outer ring surface of the driven gear ring. The driving gear is fixedly sleeved on the output end of the electric motor. The electric motor is fixed to the reactor body.

[0007] Optionally, the partition structure includes a movable vertical plate and a partition column. The movable vertical plate is fixedly sleeved on the outer surface of the partition column. The upper and lower ends of the movable vertical plate slide through the upper and lower inner walls of the fixed cover plate, respectively. Short grooves are provided on the front of the movable vertical plate and on both sides of the partition column. The two short grooves are respectively connected to two vertical grooves. The partition column is slidably inserted into the interior of the adjacent vertical grooves and vertical grooves.

[0008] Optionally, the separator column is a tubular structure with a closed rear end. Multiple elastic sealing bags are fixed at one end of the separator column inside the annular treatment tank. A bent pipe is fixedly connected to the front end of the separator column. An air cylinder is fixedly connected to the upper end of the bent pipe. A pressure plate is slidably inserted into the air cylinder. The upper surface of the pressure plate is elastically connected to the inner top wall of the air cylinder. The upper end of the pressure plate slides through the inner top wall of the air cylinder.

[0009] Optionally, the liquid supply structure includes a liquid supply pipe and a cap ring. The cap ring is rotatably inserted into the recessed structure of the treatment column, and the cap ring is fixedly sleeved on the lower end of the liquid supply pipe. The upper end of the liquid supply pipe is fixed to the upper end of the fixed outer cylinder.

[0010] Optionally, the annular processing groove is distributed in an annular wave shape, and the line connecting the crest and trough of the annular processing groove is inclined.

[0011] Optionally, the liquid outlet structure includes an upper tube and a lower tube, with the lower end of the upper tube fixed to the upper end of the lower tube, the upper end of the upper tube fixedly penetrating the bottom surface of the treatment column, and the lower end of the lower tube fixedly penetrating the upper surface of the ring plate.

[0012] Optionally, the upper tube is equipped with a floating head inside, the outer diameter of which is smaller than the inner diameter of the upper tube. A thick rod is fixed to the bottom surface of the floating head. Both the upper tube and the lower tube are slidably sleeved on the outer surface of the thick rod. A thin rod is fixed to the lower end of the thick rod. A fork is slidably sleeved on the outer surface of the thin rod. The fork is fixedly inserted into the interior of the lower tube. The outer diameter of the thin rod is smaller than the outer diameter of the thick rod. The upper end of the upper tube is located at the bottom of the annular treatment tank wall.

[0013] Optionally, the height of the vertical trough is equal to the height of the vertical channel, and the height of the vertical trough is greater than the distance between the highest and lowest points of the annular processing channel.

[0014] In summary, the present invention has the following beneficial technical effects:

[0015] 1. This invention, by setting up an annular treatment tank, a partition structure, and a venting box, allows absorbent liquid to be poured into the annular treatment tank through a liquid inlet. A fixed outer cylinder seals the outer ring surface of the annular treatment tank. The partition structure separates the interior of the annular treatment tank. A vacuum pump injects gas generated inside the reactor into the annular treatment tank from one side of the partition structure. Because the partition structure is inserted inside the annular treatment tank, the gas can only circulate once inside the annular treatment tank before being discharged from the venting box on the other side of the partition structure, increasing the movement path of the gas within the annular treatment tank. The wavy annular treatment tank further increases the gas's travel path and the contact time between the gas and the absorbent liquid.

[0016] 2. This invention, by setting up a movable vertical plate, a partition column, a short groove, an elastic sealing bladder, and a pressure plate, allows the pressure plate, in an elastic connection with the air cylinder, to tend to fill the partition column with gas from the air cylinder. The filled gas pushes the elastic sealing bladder to expand and fully contact the inner wall of the annular treatment tank, preventing gas from leaking directly to the other side through the partition column and the inner wall of the annular treatment tank. When the motor drives the treatment column to rotate through transmission, the partition column slides within the annular treatment tank, causing the movable vertical plate to slide within the fixed cover plate. As the movable vertical plate moves, the short groove moves up and down with the movable vertical plate, connecting the vertical groove, the annular treatment tank, and the air pump continuously changes the position of the new gas to be treated entering the annular treatment tank through the connected ventilation box, continuously pushing the previously filled gas out of the ventilation box on the other side of the partition column.

[0017] 3. This invention uses an upper pipe, a lower pipe, a float head, a thick rod, and a thin rod. The treatment liquid sprayed into the annular treatment tank flows into the upper pipe. The thick rod seals the connection between the upper and lower pipes. As the liquid level in the upper pipe increases, the liquid level pushes the float head, causing the thick and thin rods to gradually move upward. When the thin rod is pulled into the upper pipe, the liquid in the upper pipe flows from the gap between the thin rod and the upper and lower pipes into the lower pipe, and then flows into the collection ring cylinder. After the liquid level in the upper pipe drops below a certain height, the thick rod re-seals the upper and lower pipes, ensuring that liquid always exists in the upper pipe and preventing gas leakage from the connection between the upper and lower pipes and the thick rod. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection between the driving gear and the driven gear ring in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the connection between the collecting ring cylinder and the ring plate in an embodiment of the present invention;

[0021] Figure 4 This is a top view schematic diagram of some structures in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the connection between the movable vertical plate and the fixed cover plate in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection between the upper and lower pipes in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the connection between the separator column and the elastic sealing bag in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the connection between the thin rod and the thick rod in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the connection between the air pressure plate and the air cylinder in an embodiment of the present invention.

[0027] Reference numerals: 1. Reactor body; 2. Fixed outer cylinder; 3. Processing column; 4. Annular processing tank; 5. Power structure; 51. Electric motor; 52. Driving gear; 53. Driven gear ring; 6. Separation structure; 61. Movable vertical plate; 62. Separation column; 621. Elastic sealing bag; 622. Bend; 623. Gas cylinder; 624. Pressure plate; 63. Short trough; 7. Liquid supply structure; 71. Liquid supply pipe; 72. Cover ring; 8. Liquid outlet structure; 81. Upper pipe; 82. Lower pipe; 83. Float head; 84. Thick rod; 85. Fork; 86. Thin rod; 9. Vacuum pump; 10. Fixed cover plate; 11. Vertical trough; 12. Vertical trough; 13. Ventilation box; 14. Collection ring cylinder; 15. Ring plate; 16. Liquid passage hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-9 The present invention will be described in further detail below.

[0029] This invention discloses a reaction vessel for the production of nicosulfuron-methyl feedstock. For example... Figure 1-9 As shown, the reactor includes a reactor body 1. A processing column 3 is rotatably sleeved on the outer ring surface of the reactor body 1. A fixed outer cylinder 2 is rotatably sleeved on the outer surface of the processing column 3. The upper end of the fixed outer cylinder 2 is fixed to the outer ring surface of the reactor body 1. An annular processing groove 4 is formed on the outer circumferential surface of the processing column 3. The annular processing groove 4 is distributed in an annular wave shape. The line connecting the crest and trough of the annular processing groove 4 is inclined to increase the path of the gas when it moves one revolution in the annular processing groove 4. A power structure 5 is connected to the upper end of the processing column 3. The power structure 5 is installed on the outer surface of the reactor body 1. The power structure 5 includes a motor 51, a driving gear 52, and a driven gear ring 53. The lower end of the driven gear ring 53 is fixed to the upper end of the processing column 3. The driving gear 52 meshes with the outer ring surface of the driven gear ring 53. The driving gear 52 is fixedly sleeved on the output end of the motor 51. The motor 51 is fixed to the reactor body 1. The motor 51 drives the driving gear 52 to rotate. The driven gear ring 53 drives the processing column 3 to rotate by meshing with the driving gear 52.

[0030] A vacuum pump 9 is fixedly connected to the upper end of the reactor body 1. A fixed cover plate 10 is fixed to the outer surface of the fixed outer cylinder 2. A partition structure 6 is slidably inserted into the interior of the annular treatment tank 4. Three vertical grooves 11 are opened on the outer ring surface of the fixed outer cylinder 2. The vertical groove 11 located in the middle position of the three vertical grooves 11 is slidably sleeved on the outer surface of the partition structure 6. Three through vertical grooves 12 are opened on the side of the fixed cover plate 10 away from the axis of the reactor body 1. The three vertical grooves 12 are respectively connected to the three vertical grooves 11. The height of the vertical grooves 11 is equal to the height of the vertical grooves 12. The height of the vertical grooves 11 is greater than the distance between the highest point and the lowest point of the annular treatment tank 4. Two ventilation boxes 13 are fixed on the side of the fixed cover plate 10 away from the fixed outer cylinder 2.

[0031] The middle vertical slot 12 of the three vertical slots 12 is slidably fitted onto the outer surface of the partition structure 6. The partition structure 6 includes a movable vertical plate 61 and a partition column 62. The movable vertical plate 61 is fixedly fitted onto the outer surface of the partition column 62. The upper and lower ends of the movable vertical plate 61 slide through the upper and lower inner walls of the fixed cover plate 10, respectively. Short slots 63 are provided on the front of the movable vertical plate 61 and on both sides of the partition column 62. The two short slots 63 are respectively connected to the two vertical slots 12. The partition column 62 is slidably inserted into the adjacent vertical slots 11 and 12. Inside the vertical trough 12, when the processing column 3 rotates, the partition column 62 slides in the annular processing trough 4. The partition column 62 drives the movable vertical plate 61 to move up and down in the fixed cover plate 10. When the movable vertical plate 61 moves, the two short troughs 63 are connected to the two vertical troughs 12 respectively, and the other two vertical troughs 12 are connected to the two ventilation boxes 13 respectively. The exhaust end of the vacuum pump 9 is fixedly connected to one of the ventilation boxes 13. The exhaust end of the vacuum pump 9 fills the annular processing trough 4 with the gas in the reactor body 1 through the connected ventilation box 13.

[0032] The partition column 62 is a tubular structure with a closed rear end. Multiple elastic sealing bags 621 are fixed at one end of the partition column 62 inside the annular treatment tank 4. The front end of the partition column 62 is fixedly connected to a bend pipe 622. The upper end of the bend pipe 622 is fixedly connected to an air cylinder 623. A pressure plate 624 is slidably inserted into the air cylinder 623. The upper surface of the pressure plate 624 is elastically connected to the inner top wall of the air cylinder 623. The upper end of the pressure plate 624 slides through the inner top wall of the air cylinder 623. The pressure plate 624, through its elastic connection with the air cylinder 623, has the tendency to fill the partition column 62 with gas. The filled gas has the tendency to push the elastic sealing bags 621 to expand and fully contact the annular treatment tank 4, effectively preventing gas from directly communicating through the partition column 62.

[0033] The upper surface of the treatment column 3 is a concave structure. A liquid supply structure 7 is rotatably inserted into the concave structure of the treatment column 3. The other end of the liquid supply structure 7 is connected to the fixed outer cylinder 2. The liquid supply structure 7 includes a liquid supply pipe 71 and a cover ring 72. The cover ring 72 is rotatably inserted into the concave structure of the treatment column 3. The cover ring 72 is fixedly sleeved on the lower end of the liquid supply pipe 71. The upper end of the liquid supply pipe 71 is fixed to the upper end of the fixed outer cylinder 2. The outer end of the liquid supply pipe 71 is connected to the absorption liquid supply structure.

[0034] The bottom wall of the concave structure of the treatment column 3 is provided with multiple liquid passage holes 16 that communicate with the annular treatment tank 4. The liquid supply pipe 71 fills the concave structure of the treatment column 3 with absorbent liquid, and then the absorbent liquid is poured into the annular treatment tank 4 through the liquid passage holes 16.

[0035] A collecting ring cylinder 14 is installed below the processing column 3. The collecting ring cylinder 14 is fixedly sleeved on the outer surface of the reactor body 1. An annular plate 15 is rotatably inserted into the upper surface of the collecting ring cylinder 14. A liquid outlet structure 8 is fixedly inserted into the upper surface of the annular plate 15. The upper end of the liquid outlet structure 8 is fixedly inserted through the bottom surface of the processing column 3. The upper end of the liquid outlet structure 8 is connected to the interior of the annular processing tank 4. The liquid outlet structure 8 includes an upper pipe 81 and a lower pipe 82. The lower end of the upper pipe 81 is fixed to the upper end of the lower pipe 82. The upper end of the upper pipe 81 is fixedly inserted through the bottom surface of the processing column 3. The lower end of the lower pipe 82 is fixedly inserted through the upper surface of the annular plate 15. A float head 83 is installed inside the upper pipe 81. The outer diameter of the float head 83 is smaller than the inner diameter of the upper pipe 81. A thick rod 84 is fixed to the bottom surface of the float head 83. Both the upper pipe 81 and the lower pipe 82 are slidably sleeved on the outer surface of the thick rod 84. A thin rod 86 is fixed to the lower end of the thick rod 84. A fork 85 is slidably fitted onto the outer surface of the thin rod 86. The fork 85 is fixedly inserted into the interior of the lower pipe 82. The outer diameter of the thin rod 86 is smaller than that of the thick rod 84. The upper end of the upper pipe 81 is located at the bottom of the wave in the annular treatment tank 4. The treatment liquid sprayed into the annular treatment tank 4 flows into the upper pipe 81. As the liquid level of the absorbent in the upper pipe 81 increases, the liquid level pushes the float 83, causing the thick rod 84 and the thin rod 86 to gradually move upward. When the thin rod 86 is pulled into the upper pipe 81, the liquid in the upper pipe 81 flows from the gap between the thin rod 86, the upper pipe 81, and the lower pipe 82 into the lower pipe 82, and then flows into the collecting ring cylinder 14. After the liquid in the upper pipe 81 is lower than a certain height, the thick rod 84 re-seals the upper pipe 81 and the lower pipe 82 to ensure that there is always liquid in the upper pipe 81 and to prevent gas from leaking from the joint between the upper pipe 81, the lower pipe 82, and the thick rod 84.

[0036] The working principle is as follows: the liquid supply pipe 71 fills the concave structure of the treatment column 3 with absorbent liquid, and then the absorbent liquid is poured into the annular treatment tank 4 through the liquid passage hole 16. The outer cylinder 2 is fixed to seal the outer ring surface of the annular treatment tank 4. The partition column 62 is inserted into the annular treatment tank 4 to separate it. The pressure plate 624, under the elastic connection with the gas cylinder 623, has the tendency to fill the gas in the gas cylinder 623 into the partition column 62. The filled gas pushes the elastic sealing bag 621 to expand and fully contact the inner wall of the annular treatment tank 4. The vacuum pump 9 fills the annular treatment tank 4 with the gas generated in the reactor body 1 from one side of the partition column 62. Since the partition column 62 is inserted inside the annular treatment tank 4, the gas can only be... The gas must travel around the annular treatment tank 4 before it can be discharged from the vent box 13 on the other side of the partition column 62. The wavy annular treatment tank 4 further increases the gas's path and the contact time between the gas and the absorbent liquid. When the treatment column 3 rotates, the partition column 62 slides within the annular treatment tank 4, causing the movable vertical plate 61 to slide within the fixed cover plate 10. As the movable vertical plate 61 moves, the short trough 63 moves up and down with it, connecting the vertical trough 12, the vertical trough 11, and the annular treatment tank 4. The vacuum pump 9 continuously changes the position of the new gas to be treated entering the annular treatment tank 4 through the connected vent box 13, continuously pushing the previously filled gas out of the vent box 13 on the other side of the partition column 62.

[0037] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A reaction vessel for the production of nicosulfuron-methyl feedstock, comprising a reaction vessel body (1), characterized in that: The outer ring of the reactor body (1) is rotatably fitted with a processing column (3), and the outer surface of the processing column (3) is rotatably fitted with a fixed outer cylinder (2). The upper end of the fixed outer cylinder (2) is fixed to the outer ring of the reactor body (1). An annular processing groove (4) is opened on the outer circumferential surface of the processing column (3). The upper end of the processing column (3) is connected to a power structure (5). The power structure (5) is installed on the outer surface of the reactor body (1). The upper end of the reactor body (1) is fixedly connected to a vacuum pump (9). The outer surface of the fixed outer cylinder (2) is fixed with a fixed... The fixed cover plate (10) has a partition structure (6) that is slidably inserted into the annular treatment tank (4). The outer ring surface of the fixed outer cylinder (2) has three vertical grooves (11). The vertical groove (11) in the middle position of the three vertical grooves (11) is slidably sleeved on the outer surface of the partition structure (6). The side of the fixed cover plate (10) away from the axis of the reactor body (1) has three through vertical grooves (12). The three vertical grooves (12) are respectively connected to the three vertical grooves (11). The side of the fixed cover plate (10) away from the fixed outer cylinder (2) is fixed. There are two ventilation boxes (13). The middle vertical slot (12) of the three vertical slots (12) is slidably fitted onto the outer surface of the partition structure (6). The other two vertical slots (12) are respectively connected to the two ventilation boxes (13). The air outlet of the suction pump (9) is fixedly connected to one of the ventilation boxes (13). The upper surface of the treatment column (3) is a concave structure. A liquid supply structure (7) is rotatably inserted into the concave structure of the treatment column (3). The other end of the liquid supply structure (7) is connected to the fixed outer cylinder (2). The treatment column (3) has... The concave structure has multiple liquid passage holes (16) that communicate with the annular treatment tank (4) on its inner bottom wall. A collection ring cylinder (14) is provided below the treatment column (3). The collection ring cylinder (14) is fixedly sleeved on the outer surface of the reactor body (1). A ring plate (15) is rotatably inserted into the upper surface of the collection ring cylinder (14). A liquid outlet structure (8) is fixedly inserted into the upper surface of the ring plate (15). The upper end of the liquid outlet structure (8) is fixedly inserted through the bottom surface of the treatment column (3). The upper end of the liquid outlet structure (8) communicates with the interior of the annular treatment tank (4). The partition structure (6) includes a movable vertical plate (61) and a partition column (62). The movable vertical plate (61) is fixedly sleeved on the outer surface of the partition column (62). The upper and lower ends of the movable vertical plate (61) slide through the inner walls of the upper and lower sides of the fixed cover plate (10). Short grooves (63) are provided on the front of the movable vertical plate (61) and on both sides of the partition column (62). The two short grooves (63) are connected to the two vertical grooves (12) respectively. The partition column (62) is slidably inserted into the interior of the adjacent vertical grooves (11) and vertical grooves (12). The separator (62) is a tubular structure with a closed rear end. One end of the separator (62) located inside the annular treatment tank (4) is fixed with multiple elastic sealing bags (621). The front end of the separator (62) is fixedly connected to a bend (622). The upper end of the bend (622) is fixedly connected to an air cylinder (623). An air pressure plate (624) is slidably inserted into the air cylinder (623). The upper surface of the air pressure plate (624) is elastically connected to the inner top wall of the air cylinder (623). The upper end of the air pressure plate (624) slides through the inner top wall of the air cylinder (623).

2. The reaction vessel for producing nicosulfuron-methyl raw material according to claim 1, characterized in that: The power structure (5) includes an electric motor (51), a drive gear (52) and a driven gear ring (53). The lower end of the driven gear ring (53) is fixed to the upper end of the processing column (3). The drive gear (52) meshes with the outer ring surface of the driven gear ring (53). The drive gear (52) is fixedly sleeved on the output end of the electric motor (51). The electric motor (51) is fixed to the reactor body (1).

3. The reaction vessel for producing nicosulfuron-methyl raw material according to claim 1, characterized in that: The liquid supply structure (7) includes a liquid supply pipe (71) and a cover ring (72). The cover ring (72) is rotatably inserted into the recessed structure of the treatment column (3). The cover ring (72) is fixedly sleeved on the lower end of the liquid supply pipe (71). The upper end of the liquid supply pipe (71) is fixed to the upper end of the fixed outer cylinder (2).

4. The reaction vessel for producing nicosulfuron-methyl feedstock according to claim 1, characterized in that: The annular treatment trough (4) is distributed in an annular wave shape, and the line connecting the crest and trough of the annular treatment trough (4) is inclined.

5. A reaction vessel for producing nicosulfuron-methyl feedstock according to claim 4, characterized in that: The liquid outlet structure (8) includes an upper tube (81) and a lower tube (82). The lower end of the upper tube (81) is fixed to the upper end of the lower tube (82). The upper end of the upper tube (81) is fixed to penetrate the bottom surface of the treatment column (3), and the lower end of the lower tube (82) is fixed to penetrate the upper surface of the ring plate (15).

6. A reaction vessel for producing nicosulfuron-methyl feedstock according to claim 5, characterized in that: The upper tube (81) is equipped with a float (83) inside. The outer diameter of the float (83) is smaller than the inner diameter of the upper tube (81). A thick rod (84) is fixed on the bottom surface of the float (83). The upper tube (81) and the lower tube (82) are both slidably sleeved on the outer surface of the thick rod (84). A thin rod (86) is fixed at the lower end of the thick rod (84). A fork (85) is slidably sleeved on the outer surface of the thin rod (86). The fork (85) is fixedly inserted into the interior of the lower tube (82). The outer diameter of the thin rod (86) is smaller than the outer diameter of the thick rod (84). The upper end of the upper tube (81) is located at the bottom of the annular treatment tank (4).

7. A reaction vessel for the production of nicosulfuron-methyl feedstock according to claim 4, characterized in that: The height of the vertical groove (11) is equal to the height of the vertical groove (12), and the height of the vertical groove (11) is greater than the distance between the highest and lowest points of the annular processing groove (4).

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