Continuous production device for azo reaction

Abstract

The utility model discloses an azo reaction continuous production device which comprises a reaction kettle and a product storage tank, the bottom of the reaction kettle is communicated with a discharge pipe, and one end of the discharge pipe is connected with the product storage tank through a flange; according to the utility model, by pushing the limiting seat on the support plate, the T-shaped sliding block of the limiting seat is promoted to slide in the sliding groove, so that the pointer part of the limiting seat moves up and down corresponding to the scale marks on the surface of the metering cylinder, and when the pointer part reaches a preset position, the plum blossom knob at the edge of the limiting seat is rotated to abut against the support plate; a servo motor is started to drive a screw rod at the output end of the servo motor to rotate, and then a threaded sleeve drives a guide ring arranged on the surface of a metering cylinder in a sleeving mode to move when moving along the surface of the screw rod, so that a push rod fixedly connected to the guide ring pushes a piston in the metering cylinder to move downwards; and the PLC controller cuts off the power supply of the servo motor after receiving the signal, so that the purpose of accurately feeding the diazonium salt solution is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dye production, in particular to a continuous production device for azo reaction. Background Art

[0002] The dye industry is one of the industries with the longest history in the fine chemical industry. In recent years, with the development of my country's light textile industry, the dye industry has also developed rapidly. In the process of preparing azo dyes, it is necessary to go through the steps of diazotization, acid coupling or alkaline coupling. The coupling reaction refers to the reaction process in which the diazonium salt of aromatic primary amine reacts with phenol or aromatic amine to generate azo compounds. However, due to the instability of diazonium salts, when injecting them into the reactor, the reaction conditions such as the drop rate and the drop state must be accurately controlled, otherwise it will directly affect the efficiency of the synthesis and the quality of the final product. Usually, the coupling process in the prior art is generally to directly add the materials directly into the reactor through a pipeline, and quickly stir and mix them by the stirring paddle in the reactor to react evenly. This method of adding materials requires a certain amount of time for the materials to be mixed evenly, which not only affects the reaction time, but also leads to an increase in side reactions, directly affects the purity of the product, reduces the efficiency of the coupling reaction, and cannot achieve automatic control of the coupling reaction.

[0003] After searching, the announcement number CN212215495U provides a continuous production device for coupling reaction of azo dyes, including a reactor, a metering barrel and a first detection component respectively connected to the two ends of the reactor, and a transfer kettle and a finished product pot respectively connected to the first detection component, the reactor includes a reactor body, a motor arranged on the top of the reactor body, a stirring component connected to the motor and located inside the reactor body, and a cooling component arranged around the reactor body, the metering barrel is connected to a spray part, the spray part is located inside the reactor body, the stirring component includes a stirring shaft and a first stirring part and a second stirring part connected to the stirring shaft from top to bottom, the stirring shaft is connected to the motor, and the first stirring part is located below the spray part. The utility model can ensure continuous low temperature during the coupling reaction, can ensure the sufficiency of the coupling reaction, and improve the purity of the product.

[0004] In the above scheme, the diazonium salt solution is added by connecting the spray part of the metering barrel. However, since the metering barrel is not provided with an automatic stop structure, there may be a phenomenon of excessive addition of the diazonium salt solution, resulting in insufficient feeding accuracy.

[0005] To this end, a continuous production device for azo reaction is proposed, which has the advantages of precise feeding and continuous production, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a continuous production device for azo reaction.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a continuous production device for azo reaction, comprising a reactor and a product storage tank, the bottom of the reactor is connected with a discharge pipe, and one end of the discharge pipe is connected with the product storage tank through a flange, a support plate is vertically welded on the right side of the top of the reactor, and a servo motor is fixed on the upper surface of the support plate, and a PLC controller is fixed on the lower surface of the support plate, a screw is fixed on the output end of the servo motor, and a threaded sleeve is threadedly connected on the surface of the screw, a feeding pipe is arranged on the top surface of the reactor parallel to the support plate, and a plurality of nozzles are arranged at the bottom of the feeding pipe extending into the reactor, and a metering cylinder is connected to the top of the feeding pipe, and a side of the support plate facing the metering cylinder is provided There is a slide groove, and a T-shaped slider is slidably connected in the slide groove, one end of the T-shaped slider is fixedly connected to a limit seat, and the limit seat fits the outer wall of the metering cylinder, one end of the limit seat is provided with a pointer portion corresponding to the scale line of the metering cylinder, and the other end of the limit seat is threadedly connected with a plum blossom knob, one end of the threaded sleeve passing through the support plate is fixedly connected with a guide ring, and the guide ring is sleeved on the outer surface of the metering cylinder, and a pressure sensor is installed on the bottom surface of the guide ring corresponding to the limit seat, a push rod is fixedly connected to the upper part of the guide ring through a support member, and the push rod passes through the metering cylinder and is connected to a piston, and the piston of the push rod is connected to the inner wall of the metering cylinder, the output end of the PLC controller is electrically connected to the servo motor, and the pressure sensor is electrically connected to the PLC controller.

[0008] As a further description of the above technical solution: the reactor is provided with an agitator, and the agitator is composed of a motor and a stirring paddle fixedly connected to its output end, and the stirring paddle of the agitator extends into the interior of the reactor, and two scraping bars are fixedly connected to the upper surface of the stirring paddle through a Y-shaped support rod, and both scraping bars are in contact with the inner wall of the reactor.

[0009] As a further description of the above technical solution: valves are installed on the surfaces of the discharge pipe and the feeding pipe.

[0010] As a further description of the above technical solution: a side of the limit seat away from the T-shaped slider is provided with an arc surface adapted to the outer wall of the metering cylinder, and a screw hole adapted to the plum blossom knob is provided at one end of the limit seat away from the pointer portion.

[0011] As a further description of the above technical solution: a strip-shaped opening is provided on the surface of the support plate, and the threaded sleeve is inserted into the strip-shaped opening.

[0012] As a further description of the above technical solution: tempered glass is embedded in the surface of the product storage tank, and the lower surface of the product storage tank is connected to a discharge nozzle with a manual valve.

[0013] As a further description of the above technical solution: the support member on the guide ring is composed of two metal strips and a metal disc welded on the top thereof, and the push rod is fixed at the center of the metal disc.

[0014] The utility model has the following beneficial effects:

[0015] In the utility model, by pushing the limit seat on the support plate, the T-shaped slider of the limit seat is prompted to slide in the slide groove, so that the pointer part of the limit seat moves up or down corresponding to the scale line on the surface of the metering cylinder. When the pointer part reaches the predetermined position, the plum blossom knob at the edge of the limit seat is rotated to abut against the support plate, and the screw at its output end is driven to rotate by starting the servo motor, and then the threaded sleeve drives the guide ring sleeved on the surface of the metering cylinder to move when it moves along the surface of the screw, so that the push rod fixed on the guide ring pushes the piston in the metering cylinder to move downward, and when the pressure sensor of the guide ring contacts the limit seat, the PLC controller cuts off the power supply of the servo motor after receiving the signal, so as to achieve the purpose of accurate feeding of the diazonium salt solution. Combined with the setting of the product storage tank, compared with the existing azo reaction continuous production device, the filling amount of the diazonium salt solution can be adjusted as needed, and automatic feeding operation can be realized. Moreover, through the setting of the product storage tank, the product output in the reactor can be stored during transition, so as to realize the continuous production of the azo reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a continuous azo reaction production device of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of a reactor of a continuous azo reaction production device of the utility model;

[0018] Figure 3 This is a sectional view of the connection state of a support plate and a metering cylinder of a continuous azo reaction production device of the utility model.

[0019] Legend:

[0020] 1. Reactor; 2. Discharge pipe; 3. Product storage tank; 4. Discharge nozzle; 5. Agitator; 6. Measuring cylinder; 7. Support plate; 8. PLC controller; 9. Servo motor; 10. Screw; 11. Threaded sleeve; 12. Guide ring; 13. Push rod; 14. Piston; 15. Pressure sensor; 16. Slide; 17. Limit seat; 18. Feeding pipe; 19. Agitator paddle; 20. Nozzle; 21. Plum blossom knob; 22. T-shaped slider; 23. Pointer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] According to an embodiment of the utility model, a continuous production device for azo reaction is provided.

[0023] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3 As shown, a continuous production device for azo reaction according to an embodiment of the utility model comprises a reactor 1 and a product storage tank 3, the bottom of the reactor 1 is connected with a discharge pipe 2, and one end of the discharge pipe 2 is connected with the product storage tank 3 through a flange, a support plate 7 is vertically welded on the right side of the top of the reactor 1, and a servo motor 9 is fixed on the upper surface of the support plate 7, and a PLC controller 8 is fixedly connected to the lower surface of the support plate 7, a screw 10 is fixedly connected to the output end of the servo motor 9, and a threaded sleeve 11 is threadedly connected to the surface of the screw 10, and the reactor The top surface of the reactor 1 is parallel to the support plate 7 and is provided with a feeding pipe 18, and the bottom of the feeding pipe 18 extends into the reactor 1 and is provided with a plurality of nozzles 20, and the top of the feeding pipe 18 is connected with the metering cylinder 6, and the support plate 7 is provided with a slide groove 16 on the side facing the metering cylinder 6, and a T-shaped slider 22 is slidably connected in the slide groove 16, one end of the T-shaped slider 22 is fixedly connected to the limit seat 17, and the limit seat 17 is in contact with the outer wall of the metering cylinder 6, and one end of the limit seat 17 is provided with a pointer portion 23 corresponding to the scale line of the metering cylinder 6, and the limit seat 17 is provided with a pointer portion 23 corresponding to the scale line of the metering cylinder 6, and the limit seat 17 is provided with a pointer portion 23 corresponding to the scale line of the metering cylinder 6. One end is threadedly connected with a plum blossom knob 21, one end of the threaded sleeve 11 passes through the support plate 7 and is fixedly connected with a guide ring 12, and the guide ring 12 is sleeved on the outer surface of the metering cylinder 6, and the bottom surface of the guide ring 12 corresponds to the limit seat 17 and is installed with a pressure sensor 15, the upper part of the guide ring 12 is fixedly connected with a push rod 13 through a support member, and the push rod 13 passes through the metering cylinder 6 and is connected with a piston 14, and the piston 14 of the push rod 13 is connected to the inner wall of the metering cylinder 6, the output end of the PLC controller 8 is electrically connected to the servo motor 9, and the pressure sensor 15 is connected to the The PLC controller 8 is electrically connected, and the control circuit of the PLC controller 8 can be realized by simple programming by technicians in this field. The wiring diagram of the power element and the provision of the power supply belong to the common knowledge in this field. It is only used without modification, so the control method and circuit connection are not described in detail. The guide ring 12 is set, which can be used as a carrier of the pressure sensor 15 and as an auxiliary guide structure of the push rod 13. Among them, the filling amount of the diazonium salt solution in the metering cylinder 6 is based on the final discharge amount of the feeding pipe 18;

[0024] In one embodiment, a stirrer 5 is provided on the reactor 1, and the stirrer 5 is composed of a motor and a stirring paddle 19 fixedly connected to its output end, and the stirring paddle 19 of the stirrer 5 extends into the interior of the reactor 1, and two scraping bars are fixedly connected to the upper surface of the stirring paddle 19 through a Y-shaped support rod, and the two scraping bars are in contact with the inner wall of the reactor 1. By starting the stirrer 5, the stirring blades of the stirring paddle 19 stir the reaction materials to increase the reaction effect. The scraping bars are set to scrape off the attachments on the inner wall of the reactor 1 to increase the adequacy of the discharge. In this patent, we only use the stirrer 5 and do not improve its structure and function. For technicians in this field, its setting method, installation method and electrical connection method only need to be debugged and operated according to the requirements of its instruction manual, and will not be described in detail here.

[0025] In one embodiment, valves are installed on the surfaces of the discharge pipe 2 and the feeding pipe 18, and the discharge and feeding of materials can be performed through the valves of the discharge pipe 2 and the feeding pipe 18.

[0026] In one embodiment, a side of the limit seat 17 away from the T-shaped slider 22 is provided with an arc surface that is compatible with the outer wall of the metering cylinder 6, and an end of the limit seat 17 away from the pointer portion 23 is provided with a screw hole that is compatible with the plum blossom knob 21. By setting the arc surface, the fit between the limit seat 17 and the metering cylinder 6 is increased, wherein the plum blossom knob 21 locks the position of the limit seat 17 by abutting against the support plate 7.

[0027] In one embodiment, a strip-shaped opening is provided on the surface of the support plate 7, and the threaded sleeve 11 is inserted into the strip-shaped opening. The setting of the strip-shaped opening facilitates the movement of the threaded sleeve 11 on the one hand, and limits the threaded sleeve 11 on the other hand to ensure the stability of its movement.

[0028] In one embodiment, tempered glass is embedded in the surface of the product storage tank 3, and the lower surface of the product storage tank 3 is connected to a discharge nozzle 4 with a manual valve. The tempered glass is provided to observe the liquid level of the product storage tank 3, and the stored reaction product is discharged through the discharge nozzle 4.

[0029] In one embodiment, the support member on the guide ring 12 is composed of two metal strips and a metal disc welded on the top thereof, and the push rod 13 is fixed at the center of the metal disc. The support member is arranged to drive the push rod 13 to push the piston 14, wherein the height of the support member is adapted to the stroke of the push rod 13.

[0030] Working principle:

[0031] When in use, first rotate the rubber plug threaded on the surface of the piston 14 to expose the feed hole on the surface of the piston 14, so as to facilitate the injection of a sufficient amount of diazonium salt solution into the metering cylinder 6. After the feeding is completed, re-tighten the rubber plug. When the diazonium salt solution is added to the reactor 1, first push the limit seat 17 on the support plate 7 to cause the T-shaped slider 22 of the limit seat 17 to slide in the slide groove 16, so that the pointer part 23 of the limit seat 17 moves up or down corresponding to the scale line on the surface of the metering cylinder 6. When the pointer part 23 reaches the predetermined position, rotate the plum blossom knob 21 at the edge of the limit seat 17 to abut against the support plate 7, and then open the valve on the surface of the feeding tube 18, and start the servo motor 9 to drive its output The screw 10 at the end rotates, and then the threaded sleeve 11 moves along the surface of the screw 10, driving the guide ring 12 sleeved on the surface of the metering cylinder 6 to move, so that the push rod 13 fixed on the guide ring 12 pushes the piston 14 in the metering cylinder 6 to move downward, and the diazonium salt solution discharged from the metering cylinder 6 enters the feeding pipe 18, and is then sprayed out by a plurality of nozzles 20 arranged at the bottom of the feeding pipe 18. When the pressure sensor 15 of the guide ring 12 contacts the limit seat 17, the PLC controller 8 cuts off the power supply of the servo motor 9 after receiving the signal, so as to achieve the purpose of accurately feeding the diazonium salt solution. When the reaction in the reactor 1 is complete, the valve of the discharge pipe 2 is opened, so that the reaction product is stored in the product storage tank 3.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous azo reaction production device, comprising a reaction kettle (1) and a product storage tank (3), characterized in that: The bottom of the reactor (1) is connected to a discharge pipe (2), and one end of the discharge pipe (2) is connected to a product storage tank (3) via a flange. A support plate (7) is vertically welded to the right side of the top of the reactor (1), and a servo motor (9) is fixed to the upper surface of the support plate (7), and a PLC controller (8) is fixed to the lower surface of the support plate (7). A screw (10) is fixed to the output end of the servo motor (9), and a screw thread is connected to the surface of the screw (10). The top surface of the reaction kettle (1) is parallel to the support plate (7) and is provided with a feeding pipe (18), and the bottom of the feeding pipe (18) extends into the interior of the reaction kettle (1) and is provided with a plurality of nozzles (20), and the top of the feeding pipe (18) is connected to a metering cylinder (6), and a sliding groove (16) is provided on a side of the support plate (7) facing the metering cylinder (6), and a T-shaped sliding block (22) is slidably connected in the sliding groove (16), and one end of the T-shaped sliding block (22) is fixed A limit seat (17) is connected, and the limit seat (17) is fitted with the outer wall of the metering cylinder (6); one end of the limit seat (17) is provided with a pointer portion (23) corresponding to the scale line of the metering cylinder (6), and the other end of the limit seat (17) is threadedly connected with a plum blossom knob (21); one end of the threaded sleeve (11) passing through the support plate (7) is fixedly connected with a guide ring (12), and the guide ring (12) is sleeved on the outer surface of the metering cylinder (6), and the bottom of the guide ring (12) is A pressure sensor (15) is installed on the surface corresponding to the limit seat (17); a push rod (13) is fixedly connected to the top of the guide ring (12) through a support member, and the push rod (13) passes through the metering cylinder (6) and is connected to a piston (14), and the piston (14) of the push rod (13) is connected to the inner wall of the metering cylinder (6); the output end of the PLC controller (8) is electrically connected to the servo motor (9), and the pressure sensor (15) is electrically connected to the PLC controller (8).

2. The continuous production device for azo reaction according to claim 1, characterized in that: The reactor (1) is provided with a stirrer (5), which is composed of a motor and a stirring paddle (19) fixedly connected to its output end. The stirring paddle (19) of the stirrer (5) extends into the interior of the reactor (1), and two scraping bars are fixedly connected to the upper surface of the stirring paddle (19) via a Y-shaped support rod, and both scraping bars are in contact with the inner wall of the reactor (1).

3. The continuous production device for azo reaction according to claim 1, characterized in that: Valves are installed on the surfaces of the discharge pipe (2) and the feeding pipe (18).

4. The continuous production device for azo reaction according to claim 1, characterized in that: A side of the limit seat (17) away from the T-shaped slide block (22) is provided with an arc surface matched with the outer wall of the metering cylinder (6), and an end of the limit seat (17) away from the pointer portion (23) is provided with a screw hole matched with the plum blossom knob (21).

5. The continuous production device for azo reaction according to claim 1, characterized in that: The surface of the support plate (7) is provided with a strip-shaped opening, and the threaded sleeve (11) is inserted into the strip-shaped opening.

6. The continuous production device for azo reaction according to claim 1, characterized in that: The surface of the product storage tank (3) is embedded with tempered glass, and the lower surface of the product storage tank (3) is connected to a discharge nozzle (4) with a manual valve.

7. The continuous production device for azo reaction according to claim 1, characterized in that: The support member on the guide ring (12) is composed of two metal strips and a metal disc welded on the top thereof, and the push rod (13) is fixed at the center of the metal disc.

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