Continuous feeding device for producing dichlorobenzidine salt

Abstract

The invention is applicable to the technical field of equipment feeding, and provides a continuous feeding device for producing dichlorobenzidine salt, which comprises a feeding control assembly, an annular frame is arranged on a reaction container, the feeding control assembly comprises a feeding box body mounted in the annular frame, a shaft body is rotatably arranged in the middle of the feeding box body, and a feeding device is arranged on the shaft body; the annular frame is provided with a driving part used for driving the shaft body to rotate, the shaft body is fixedly connected with a plurality of evenly-distributed partition plates, a baffle is arranged between every two adjacent partition plates, the edges of all the baffles and the edges of the partition plates are attached to the inner wall of the feeding box body, and the baffles, the partition plates on the two sides and the inner wall of the feeding box body form a feeding bin chamber with the fixed volume. The feeding pipe is connected with a pipeline of the feeding system, and the discharging pipe is communicated with the interior of the reaction container. The quantitative feeding device has the beneficial effects that accurate quantitative feeding is achieved through rotation switching of the multiple feeding bins, and feeding stop and recovery are faster.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment feeding, and in particular relates to a continuous feeding device for producing dichlorobenzidine salt. Background Art

[0002] Dichlorobenzidine salts usually refer to compounds containing dichlorobenzidine groups. These compounds are often used as dye intermediates or as catalysts in certain specific chemical reactions.

[0003] In the production of dichlorobenzidine salts, three types of raw materials are mainly used: benzidine (or its derivatives), chlorine and hydrochloric acid. First, benzidine (or its derivatives) will react with chlorine to produce dichlorobenzidine, and then hydrochloric acid is added to react with the product to obtain the corresponding salt.

[0004] Among them, benzidine is generally in powder state. In the prior art, a screw conveyor or a gas conveyor is usually used to add it to the reaction tank. However, these two feeding devices are not precise enough in controlling the amount. Therefore, a corresponding valve structure is also required to be provided on the reaction tank to accurately control the feed amount, which complicates the feed structure. Therefore, a continuous feeding device for producing dichlorobenzidine salt is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a continuous feeding device for producing dichlorobenzidine salt, aiming to solve the problems mentioned in the above background technology.

[0006] The embodiment of the present invention is implemented as follows: a continuous feeding device for producing dichlorobenzidine salt, comprising: A feed control assembly is located at the top of the reaction container, wherein two vertically arranged mounting plates are fixedly connected to the reaction container, and a horizontally arranged annular frame is fixedly connected to the top of the two mounting plates, and the feed control assembly includes a feed box installed in the annular frame, wherein the feed box is a vertical disc-shaped structure, and a shaft body is rotatably arranged through the middle of the feed box body, and a driving member for driving the shaft body to rotate is arranged on the annular frame, and a plurality of evenly distributed partitions are fixedly connected to the shaft body, and baffles are arranged between adjacent partitions, and the edges of all baffles and partitions are in contact with the inner wall of the feed box body, and the baffles and the partitions on both sides and the inner wall of the feed box body form a feed chamber with a fixed volume; The feed pipe and the down pipe are located at the top of the feed box, and the down pipe is located at the bottom of the feed box. The feed pipe is connected to the pipeline of the feeding system, and the down pipe is connected to the interior of the reaction container.

[0007] Preferably, a through mounting hole is provided on the feed box, the shaft body is located in the mounting hole, and adapter rings are provided in the mounting holes on both sides of the feed box, the shaft body includes a sleeve shaft rotatably connected in the adapter ring, the partition is fixedly connected to the sleeve shaft, the width of the partition and the baffle are both smaller than the length of the sleeve shaft, end shafts are fixedly connected at both ends of the sleeve shaft, the two end shafts are rotatably connected to the annular frame, and the driving member drives the shaft body to rotate through one of the end shafts.

[0008] Preferably, the sleeve shaft and the end shaft are hollow structures that are interconnected, and adjustment components are provided inside the two. The output end of the adjustment component is a plurality of push rods connected to each baffle. The baffle itself is provided with a telescopic structure. The adjustment component is used to drive the baffle to move along the radial direction of the sleeve shaft through the push rods, and when the baffle moves, the baffle and the partition and the inner wall of the feed box all remain in a fit state.

[0009] Preferably, the adjustment assembly includes a drive shaft rotatably arranged in the sleeve shaft and the end shaft, and a plurality of sleeves rotatably connected to the inside of the sleeve shaft and radially distributed, the drive shaft and the sleeves are connected by a transmission member, the push rod is located in the sleeve, the push rod and the sleeve are thread-fitted, and one end of the push rod located outside the sleeve shaft is fixedly connected to the baffle; The baffle includes an arc-shaped plate fixedly connected to the top rod, and arc-shaped end covers matching the shape of the arc-shaped plate are slidably inserted at both ends of the arc-shaped plate, and both sides of the arc-shaped plate are in contact with the inner wall of the feed box body, and both sides of the arc-shaped end cover are open and the width of the arc-shaped end cover is equal to the width of the arc-shaped plate. An elastic part connected to the arc-shaped plate is fixedly connected inside the arc-shaped end cover, and the arc-shaped end cover is in contact with the partition plate and the inner wall of the feed box body.

[0010] Preferably, a rotation control member is disposed outside the sleeve shaft, and an output end of the rotation control member is connected to the drive shaft. The rotation control member is used to drive the drive shaft to rotate, so that the multiple ejector rods move synchronously along the radial direction of the sleeve shaft.

[0011] Preferably, circular holes are provided on the top and bottom of the feed box, the diameter of the circular holes is equal to the width of the inner wall of the feed box, and the feed pipe and the discharge pipe are fixedly connected to the feed box via the circular holes.

[0012] Preferably, an air inlet pipe is provided on one side of the feed box, the air inlet pipe is connected to an external air supply system, the connection between the air inlet pipe and the feed box is arranged close to the feed pipe, and the air inlet pipe is used to transport inert gas to a single feed chamber.

[0013] The embodiment of the present invention provides a continuous feeding device for producing dichlorobenzidine salt, which has the following beneficial effects: During use of the device, the feeding system feeds the raw material benzidine into the feed chamber in the feed box through a pipeline. The device utilizes the characteristic that the volume of the feed chamber is fixed. After one feed chamber is filled, all the feed chambers are driven to rotate through the driving member. When the feed chamber containing the raw material is aligned with the discharge pipe, the raw material will be put into the reaction container below. With the rotation movement of all the feed chambers, each feed chamber will be replenished successively. The volume of each feed chamber is fixed. When adding benzidine, the raw materials in one or more feed chambers can be selectively controlled to be added to the reaction container. In addition, the entire feed box is in a closed state, which will also avoid the leakage of harmful gases produced by the chemical reaction. In summary, the device utilizes the rotation switching of multiple feed chambers to achieve precise quantitative feeding, and the feeding stop and recovery are also faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the installation of a continuous feeding device and a reaction vessel for producing a dichlorobenzidine salt provided in an embodiment of the present invention; Figure 2 A three-dimensional structural diagram of a continuous feeding device for producing dichlorobenzidine salt provided in an embodiment of the present invention; Figure 3 An internal structural diagram of a feed box provided in an embodiment of the present invention; Figure 4 A three-dimensional structural diagram of a feed box provided in an embodiment of the present invention; Figure 5 A three-dimensional schematic diagram of the structure of the feed chamber provided in an embodiment of the present invention; Figure 6 A schematic diagram of the internal structure of a sleeve shaft provided in an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0015] In the attached drawings: 1. reaction vessel; 2. mounting plate; 3. annular frame; 4. feed box; 5. shaft body; 501. sleeve shaft; 502. end shaft; 6. driving member; 7. partition; 8. baffle; 801. arc plate; 802. arc end cover; 803. elastic member; 9. feed chamber; 10. feed pipe; 11. discharge pipe; 12. pipeline; 13. mounting hole; 14. adapter ring; 15. ejector rod; 16. drive shaft; 17. sleeve; 18. transmission member; 19. rotating driving member; 20. circular hole; 21. air inlet pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, a continuous feeding device for producing dichlorobenzidine salt provided by one embodiment of the present invention comprises: A feed control assembly is located at the top of the reaction vessel 1, wherein two vertically arranged mounting plates 2 are fixedly connected to the reaction vessel 1, and a horizontally arranged annular frame 3 is fixedly connected to the top of the two mounting plates 2. The feed control assembly comprises a feed box 4 installed in the annular frame 3, wherein the feed box 4 is a vertical disc-shaped structure, and a shaft 5 is rotatably arranged through the middle of the feed box 4, and a driving member 6 for driving the shaft 5 to rotate is arranged on the annular frame 3, and a plurality of evenly distributed partitions 7 are fixedly connected to the shaft 5, and baffles 8 are arranged between adjacent partitions 7, and the edges of all baffles 8 and partitions 7 are in contact with the inner wall of the feed box 4, and the baffles 8 and the partitions 7 on both sides and the inner wall of the feed box 4 form a feed chamber 9 with a fixed volume; The feed pipe 10 and the discharge pipe 11 are located at the top of the feed box 4 and the discharge pipe 11 is located at the bottom of the feed box 4 . The feed pipe 10 is connected to a pipeline 12 of a feed system and the discharge pipe 11 is communicated with the interior of the reaction container 1 .

[0019] In one embodiment of the present invention, during use of the device, the feeding system feeds the raw material benzidine into the feed chamber 9 in the feed box 4 through the pipeline 12. The device utilizes the characteristic that the volume of the feed chamber 9 is fixed. After one feed chamber 9 is filled, all the feed chambers 9 are driven to rotate through the driving member 6. When the feed chamber 9 filled with the raw material is aligned with the discharge pipe 11, the raw material will be put into the reaction vessel 1 below. With the rotation movement of all the feed chambers 9, each feed chamber 9 will be replenished successively. The volume of each feed chamber 9 is fixed. When adding benzidine, the raw materials in one or more feed chambers 9 can be selectively controlled to be added to the reaction vessel 1. In addition, the feed box 4 as a whole is also in a closed state, which will also avoid the leakage of harmful gases produced by the chemical reaction. In summary, the device utilizes the rotation switching of multiple feed chambers 9 to achieve precise quantitative feeding, and the feeding stop and recovery are also faster.

[0020] In one embodiment of the present invention, Figure 3As shown, circular holes 20 are provided on the top and bottom of the feed box 4, and the diameter of the circular hole 20 is equal to the width of the inner wall of the feed box 4. The feed pipe 10 and the discharge pipe 11 are fixedly connected to the feed box 4 through the circular hole 20. When one of the feed chambers 9 corresponds to the position of the feed pipe 10, the benzidine raw material will fall into the feed chamber 9. When the feed chamber 9 is filled, the benzidine raw material will be automatically blocked and cannot enter again. As the feed chamber 9 rotates, the subsequent empty feed chambers 9 are aligned with the feed pipe 10 in succession, so that continuous feeding is achieved. In addition, the size restriction of the circular hole 20 is mainly for the benzidine raw material transportation process at the discharge pipe 11. As the partition 7 rotates, enough benzidine raw material falls from the circular hole 20 to minimize the residual raw material in the feed chamber 9.

[0021] like Figure 4 , Figure 5 and Figure 6 As shown, as a preferred embodiment of the present invention, a through mounting hole 13 is opened on the feed box 4, the shaft body 5 is located in the mounting hole 13, and adapter rings 14 are provided in the mounting holes 13 on both sides of the feed box 4. The shaft body 5 includes a sleeve shaft 501 rotatably connected in the adapter ring 14, and the partition 7 is fixedly connected to the sleeve shaft 501. The widths of the partition 7 and the baffle 8 are both smaller than the length of the sleeve shaft 501. End shafts 502 are fixedly connected at both ends of the sleeve shaft 501. The two end shafts 502 are rotatably connected to the annular frame 3, and the driving member 6 drives the shaft body 5 to rotate through one of the end shafts 502.

[0022] In one case of the present embodiment, the driving member 6 can be in the form of a reduction motor, and of course, it can also be in the form of a pneumatic motor, the purpose of which is to control the rotation of the feed chamber 9. In the above embodiment, the capacity of each feed chamber 9 is fixed. When feeding, the benzidine raw material in one or more feed chambers 9 can be added at one time to achieve the specified dosage. However, there may be special cases where the corresponding dosage cannot be obtained even if multiple feed chambers 9 are combined. Therefore, the sleeve shaft 501 and the end shaft 502 are hollow structures that are interconnected. Adjustment components are provided inside the two. The output end of the adjustment component is a plurality of push rods 15 connected to each baffle 8. The baffle 8 itself is provided with a telescopic structure. The adjustment component is used to drive the baffle 8 to move along the radial direction of the sleeve shaft 501 through the push rod 15, and when the baffle 8 moves, the baffle 8 and the partition 7 and the inner wall of the feed box 4 are kept in contact. The above structure can realize the synchronous change of the capacity of each feed chamber 9, thereby making the combined dosage of the feed chamber 9 more flexible and changeable.

[0023] like Figure 5 , Figure 6 and Figure 7As shown, as a preferred embodiment of the present invention, the adjustment component includes a drive shaft 16 rotatably arranged in the sleeve shaft 501 and the end shaft 502, and a plurality of sleeves 17 rotatably connected to the inside of the sleeve shaft 501 and radially distributed, the drive shaft 16 and the sleeve 17 are connected by a transmission member 18, the push rod 15 is located in the sleeve 17, and the push rod 15 and the sleeve 17 are thread-fitted, and the end of the push rod 15 located outside the sleeve shaft 501 is fixedly connected to the baffle 8.

[0024] In one case of the present embodiment, the baffle 8 includes an arc-shaped plate 801 fixedly connected to the ejector rod 15, and arc-shaped end covers 802 matching the shape of the arc-shaped plate 801 are slidably inserted at both ends of the arc-shaped plate 801, and both sides of the arc-shaped plate 801 are in contact with the inner wall of the feed box 4, and both sides of the arc-shaped end covers 802 are open and the width of the arc-shaped end covers 802 is equal to the width of the arc-shaped plate 801, and an elastic member 803 connected to the arc-shaped plate 801 is fixedly connected inside the arc-shaped end covers 802, and the arc-shaped end covers 802 are in contact with the partition 7 and the inner wall of the feed box 4. A rotating control member is provided on the outside of the sleeve shaft 501, and the output end of the rotating control member is connected to the driving shaft 16. The rotating control member is used to drive the driving shaft 16 to rotate, so that multiple ejector rods 15 move synchronously along the radial direction of the sleeve shaft 501, and the rotating control member can be driven by a motor. The form can also be adopted manually. When the amount of raw material added cannot be achieved by the combination of multiple feed chambers 9, the driving shaft 16 can be driven to rotate by rotating the control member. After the transmission member 18 transmits, the multiple sleeves 17 rotate synchronously. Since one end of the top rod 15 is fixedly connected to the arc plate 801, the top rod 15 will move, thereby pushing the arc plate 801 to move radially. Due to the presence of the elastic member 803, the arc end cover 802 will automatically retract and retract at both ends of the arc plate 801, so that it can ensure the fit state with the partitions 7 on both sides, which will cause the capacity of the feed chamber 9 to change, and also enable the original amount of raw material to be achieved. The transmission member 18 can adopt the friction transmission method, or the bevel gear meshing transmission method. The elastic member 803 can be in the form of a spring or an elastic air cushion.

[0025] like Figure 2 As shown, as a preferred embodiment of the present invention, an air intake pipe 21 is arranged on one side of the feed box 4, and the air intake pipe 21 is connected to an external air supply system. The connection between the air intake pipe 21 and the feed box 4 is arranged close to the discharge pipe 11, and the air intake pipe 21 is used to transport inert gas to a single feed chamber 9.

[0026] In one case of this embodiment, since raw materials such as benzidine are in powder form, even if the partition 7 has a scraping effect, there will be raw materials remaining on the inner wall or corner of the feed chamber 9. Therefore, an inert gas, such as nitrogen, can be transported into the feed chamber 9 where the feed is being fed through the air inlet pipe 21, which can accelerate the falling process of the raw materials and remove the residual raw materials in the feed chamber 9. The inert gas will also enter the reaction vessel 1, which can be used to remove oxygen and other impurity gases in the reaction system that may cause side reactions. This helps to reduce unnecessary side reactions and improve the yield of the target product. Chlorine is a toxic and highly oxidizing gas. Using nitrogen as a protective gas can reduce the risk of chlorine leakage. By introducing nitrogen into the reaction system, the concentration of chlorine can be diluted, thereby slowing down the reaction rate and making the reaction more gentle and controllable. This is particularly important for some reactions that are sensitive to temperature or prone to out-of-control, and the tail gas (such as hydrogen chloride gas) generated during the reaction can be diluted by nitrogen, which facilitates the subsequent tail gas treatment system to more effectively absorb or neutralize these harmful gases.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A continuous feeding device for producing dichlorobenzidine salt, characterized in that, include: A feed control assembly is located at the top of a reaction container (1), wherein two vertically arranged mounting plates (2) are fixedly connected to the reaction container (1), and a horizontally arranged annular frame (3) is fixedly connected to the top of the two mounting plates (2). The feed control assembly comprises a feed box (4) installed in the annular frame (3), wherein the feed box (4) is a vertical disc-shaped structure, and a shaft (5) is rotatably arranged through the middle of the feed box (4). A driving member (6) for driving the shaft (5) to rotate is arranged on the annular frame (3), and a plurality of evenly distributed partitions (7) are fixedly connected to the shaft (5), and baffles (8) are arranged between adjacent partitions (7), and the edges of all baffles (8) and partitions (7) are in contact with the inner wall of the feed box (4), and the baffles (8) and the partitions (7) on both sides and the inner wall of the feed box (4) form a feed chamber (9) with a fixed volume; A feed pipe (10) and a discharge pipe (11), wherein the feed pipe (10) is located at the top of the feed box (4), and the discharge pipe (11) is located at the bottom of the feed box (4), the feed pipe (10) is connected to a pipe (12) of a feed system, and the discharge pipe (11) is connected to the interior of a reaction vessel (1).

2. The continuous feeding device for producing dichlorobenzidine salt according to claim 1, characterized in that: The feed box (4) is provided with a through mounting hole (13), the shaft (5) is located in the mounting hole (13), and adapter rings (14) are provided in the mounting holes (13) on both sides of the feed box (4). The shaft (5) includes a sleeve (501) rotatably connected in the adapter ring (14), and the partition (7) is fixedly connected to the sleeve (501). The widths of the partition (7) and the baffle (8) are both smaller than the length of the sleeve (501). Both ends of the sleeve (501) are fixedly connected with end shafts (502), and the two end shafts (502) are rotatably connected to the annular frame (3), and the driving member (6) drives the shaft (5) to rotate through one of the end shafts (502).

3. The continuous feeding device for producing dichlorobenzidine salt according to claim 2, characterized in that: The sleeve shaft (501) and the end shaft (502) are hollow structures interconnected, and adjustment components are arranged inside the two. The output end of the adjustment component is a plurality of push rods (15) connected to each baffle (8). The baffle (8) itself is provided with a telescopic structure. The adjustment component is used to drive the baffle (8) to move along the radial direction of the sleeve shaft (501) through the push rods (15), and when the baffle (8) moves, the baffle (8) and the partition (7) and the inner wall of the feed box (4) are kept in a fit state.

4. The continuous feeding device for producing dichlorobenzidine salt according to claim 3, characterized in that: The adjustment assembly comprises a drive shaft (16) rotatably arranged inside the sleeve shaft (501) and the end shaft (502), and a plurality of sleeves (17) rotatably connected inside the sleeve shaft (501) and radially distributed, the drive shaft (16) and the sleeves (17) being connected via a transmission member (18), the push rod (15) being located inside the sleeve shaft (17), the push rod (15) and the sleeve shaft (17) being thread-fitted, and one end of the push rod (15) located outside the sleeve shaft (501) being fixedly connected to the baffle (8); The baffle (8) comprises an arc-shaped plate (801) fixedly connected to the top rod (15), and arc-shaped end covers (802) matching the shape of the arc-shaped plate (801) are slidably inserted at both ends of the arc-shaped plate (801), and both sides of the arc-shaped plate (801) are in contact with the inner wall of the feed box (4), and both sides of the arc-shaped end cover (802) are open and the width of the arc-shaped end cover (802) is equal to the width of the arc-shaped plate (801), and an elastic member (803) connected to the arc-shaped plate (801) is fixedly connected inside the arc-shaped end cover (802), and the arc-shaped end cover (802) is in contact with the partition (7) and the inner wall of the feed box (4).

5. The continuous feeding device for producing dichlorobenzidine salt according to claim 4, characterized in that: The sleeve shaft (501) is provided with a rotation control member on the outside, the output end of the rotation control member is connected to the drive shaft (16), and the rotation control member is used to drive the drive shaft (16) to rotate, so that the multiple push rods (15) move synchronously along the radial direction of the sleeve shaft (501).

6. The continuous feeding device for producing dichlorobenzidine salt according to claim 1, characterized in that: The top and bottom of the feed box (4) are both provided with circular holes (20), the diameter of the circular holes (20) being equal to the width of the inner wall of the feed box (4), and the feed pipe (10) and the discharge pipe (11) are fixedly connected to the feed box (4) via the circular holes (20).

7. The continuous feeding device for producing dichlorobenzidine salt according to claim 1, characterized in that: An air intake pipe (21) is arranged on one side of the feed box (4), and the air intake pipe (21) is connected to an external air supply system. The connection between the air intake pipe (21) and the feed box (4) is arranged close to the feed pipe (11). The air intake pipe (21) is used to transport inert gas to a single feed chamber (9).

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