Mixer for preparing paraphthaloyl chloride from phosgene

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a mixer for preparing paraphthaloyl chloride from phosgene, which comprises a reaction tank, and a gas inlet pipe is fixedly arranged on one side of the reaction tank. Through the arrangement of the gas flow meter and the first electromagnetic valve, when phosgene needs to be added into the reaction tank, the gas flow meter can detect the specific amount of the conveyed phosgene, when the phosgene conveying amount reaches a certain standard, the first electromagnetic valve is closed, and through the arrangement of the weight detection device, the second electromagnetic valve and the third electromagnetic valve, the phosgene can be added into the reaction tank. When toluene needs to be added into the reaction tank, the second electromagnetic valve is opened, toluene in the liquid storage tank enters the feeding hopper, the weight detection device detects the weight change in the feeding hopper in real time, and when the weight in the feeding hopper reaches a certain standard, the second electromagnetic valve is closed, and the third electromagnetic valve is opened; toluene in the feeding hopper enters the reaction tank, so that the effects of accurately controlling the reaction addition amount of phosgene and toluene and avoiding insufficient reaction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a mixer for preparing terephthaloyl chloride from phosgene. Background Art

[0002] In chemical production, terephthaloyl chloride is an important chemical raw material, widely used in pesticides, medicines, dyes and other industrial fields. At present, the preparation methods of terephthaloyl chloride mainly include phosgene method, acyl chloride and oxidative coupling method. Among them, the phosgene method is widely used due to its mature process, easy availability of raw materials and stable product quality.

[0003] Traditional mixers lack precise control functions in the process of preparing terephthaloyl chloride by the phosgene method, which can easily lead to excessive addition of phosgene and toluene during use, resulting in insufficient reaction. Moreover, traditional mixers lack temperature regulation functions, which can easily lead to unstable internal reactions during use, resulting in unqualified product quality. Utility Model Content

[0004] The purpose of the utility model is to provide a mixer for preparing terephthaloyl chloride from phosgene to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mixer for preparing terephthaloyl chloride from phosgene, comprising a reaction tank, an air inlet pipe fixedly arranged on one side of the reaction tank, a first solenoid valve fixedly arranged on the surface of the air inlet pipe, a gas flow meter fixedly arranged on one side of the first solenoid valve, a liquid inlet pipe fixedly arranged on the right side of the top of the reaction tank, first support columns fixedly arranged on both sides of the first liquid inlet pipe, a liquid storage tank fixedly arranged on the top of the first support column, a liquid outlet pipe fixedly arranged on the bottom of the liquid storage tank, a second solenoid valve fixedly arranged on the surface of the liquid outlet pipe, a weight detection device fixedly arranged on both sides of the liquid outlet pipe, a feed hopper fixedly arranged on the bottom end of the weight detection device, and a third solenoid valve fixedly arranged on the bottom surface of the feed hopper;

[0007] A stirring assembly is fixedly arranged in the middle of the top end of the reaction tank, a temperature detecting device is fixedly arranged on one side of the bottom end of the reaction tank, a temperature regulating assembly is fixedly arranged on the other side of the reaction tank, and the temperature regulating assembly includes a first delivery pipe, a condensing tank, a delivery pump and a second delivery pipe. The first delivery pipe is fixedly arranged on the other side of the bottom end of the reaction tank, a condensing tank is fixedly arranged on one end of the first delivery pipe, a delivery pump is fixedly arranged on the top end of the condensing tank, a second delivery pipe is fixedly arranged on the top end of the delivery pump, and the second delivery pipe passes through the shell wall of the reaction tank and is fixedly connected to one side of the top end of the reaction tank.

[0008] Preferably, the stirring assembly comprises a motor, a rotating rod and a stirring rod, the motor is fixedly arranged in the middle of the top of the reaction tank, the rotating rod is rotatably arranged at the output end of the motor, and a plurality of stirring rods are fixedly arranged on the surface of the rotating rod.

[0009] Preferably, a protective shell is fixedly arranged in the middle of the top of the reaction tank, and the motor is located inside the protective shell.

[0010] Preferably, a connecting pipe is fixedly arranged in the middle of the bottom end of the reaction tank, a fourth solenoid valve is fixedly arranged on the surface of the connecting pipe, second support columns are fixedly arranged on both sides of the connecting pipe, a filter tank is fixedly arranged at the bottom end of the second support column, and the middle of the top end of the filter tank is fixedly connected to the bottom end of the connecting pipe.

[0011] Preferably, a filter tank is provided inside, and limit blocks are fixedly arranged on both sides of the filter tank, a fixed frame is movably arranged on the top of the limit block, a first filter net is fixedly arranged on the bottom of the fixed frame, a pull rod is fixedly arranged on the front of the fixed frame, and a drain pipe is fixedly arranged on one side of the filter tank.

[0012] Preferably, a touch display screen is fixedly provided on the front of the reaction tank, a second filter screen is fixedly provided inside the other end of the first delivery pipe, and a liquid level detection device is fixedly provided on the right side of the top inside the reaction tank.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The phosgene preparation terephthaloyl chloride mixer, through the setting of the gas flow meter and the first electromagnetic valve, when it is necessary to add phosgene to the inside of the reaction tank, the gas flow meter can detect the specific amount of phosgene delivered, when the phosgene delivery amount reaches a certain standard, the first electromagnetic valve is closed, and through the setting of the weight detection device, the second electromagnetic valve and the third electromagnetic valve, when it is necessary to add toluene to the inside of the reaction tank, the second electromagnetic valve is opened, and the toluene inside the liquid storage tank enters the inside of the feed hopper, the weight detection device detects the weight change inside the feed hopper in real time, when the weight inside the feed hopper reaches a certain standard, the second electromagnetic valve is closed, and the third electromagnetic valve is opened, so that the toluene inside the feed hopper enters the inside of the reaction tank, thereby achieving the effect of accurately controlling the reaction addition amount of phosgene and toluene and avoiding insufficient reaction.

[0015] 2. The phosgene preparation terephthaloyl chloride mixer is provided with a temperature detection device and a condenser. When in use, the temperature detection device detects the temperature change inside the reaction tank in real time. When the temperature inside the reaction tank is high, the delivery pump is adjusted to allow the liquid inside the reaction tank to enter the condenser through the first delivery pipe to cool down, and then be discharged into the reaction tank through the second delivery pipe. This can not only reduce the temperature inside the reaction tank, but also circulate the liquid inside the reaction tank, thereby achieving the effect of controlling the temperature inside the reaction tank and accelerating the reaction rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 For the utility model Figure 1 A magnified schematic diagram;

[0019] Figure 4 For the utility model Figure 2 Enlarged schematic diagram at point B.

[0020] In the figure: 1. reaction tank; 2. air inlet pipe; 3. first solenoid valve; 4. gas flowmeter; 5. liquid inlet pipe; 6. first support column; 7. liquid storage tank; 8. liquid outlet pipe; 9. second solenoid valve; 10. weight detection device; 11. feed hopper; 12. third solenoid valve; 13. temperature detection device; 14. temperature adjustment component; 15. first delivery pipe; 16. condenser; 17. delivery pump; 18. second delivery pipe; 19. motor; 20. rotating rod; 21. stirring rod; 22. protective shell; 23. connecting pipe; 24. second support column; 25. filter tank; 26. filter tank; 27. limit block; 28. fixing frame; 29. ​​first filter screen; 30. pull rod; 31. drain pipe; 32. touch display screen; 33. second filter screen; 34. liquid level detection device. 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] See also Figure 1-Figure 4As shown, the utility model provides a technical solution: a phosgene preparation terephthaloyl chloride mixer, comprising a reaction tank 1, an air inlet pipe 2 is fixedly arranged on one side of the reaction tank 1, a first solenoid valve 3 is fixedly arranged on the surface of the air inlet pipe 2, a gas flow meter 4 is fixedly arranged on one side of the first solenoid valve 3, a liquid inlet pipe 5 is fixedly arranged on the right side of the top of the reaction tank 1, first support columns 6 are fixedly arranged on both sides of the first liquid inlet pipe 5, a liquid storage tank 7 is fixedly arranged on the top of the first support column 6, a liquid outlet pipe 8 is fixedly arranged at the bottom of the liquid storage tank 7, a second solenoid valve 9 is fixedly arranged on the surface of the liquid outlet pipe 8, a weight detection device 10 is fixedly arranged on both sides of the liquid outlet pipe 8, a feed hopper 11 is fixedly arranged at the bottom end of the weight detection device 10, and a third solenoid valve 12 is fixedly arranged on the bottom surface of the feed hopper 11;

[0023] In this embodiment, through the setting of the gas flow meter 4 and the first solenoid valve 3, when it is necessary to add phosgene to the inside of the reaction tank 1, the gas flow meter 4 can detect the specific amount of phosgene delivered. When the phosgene delivery amount reaches a certain standard, the first solenoid valve 3 is closed. Through the setting of the weight detection device 10, the second solenoid valve 9 and the third solenoid valve 12, when it is necessary to add toluene to the inside of the reaction tank 1, the second solenoid valve 9 is opened, and the toluene inside the liquid storage tank 7 enters the inside of the feed hopper 11. The weight detection device 10 detects the weight change inside the feed hopper 11 in real time. When the weight inside the feed hopper 11 reaches a certain standard, the second solenoid valve 9 is closed, and the third solenoid valve 12 is opened, so that the toluene inside the feed hopper 11 enters the inside of the reaction tank 1, thereby achieving the effect of accurately controlling the reaction addition amount of phosgene and toluene to avoid insufficient reaction;

[0024] like Figure 2 As shown, a stirring assembly is fixedly arranged in the middle of the top of the reaction tank 1, a temperature detection device 13 is fixedly arranged on one side of the bottom of the reaction tank 1, a temperature adjustment assembly 14 is fixedly arranged on the other side of the reaction tank 1, and the temperature adjustment assembly 14 includes a first delivery pipe 15, a condensing tank 16, a delivery pump 17 and a second delivery pipe 18. The first delivery pipe 15 is fixedly arranged on the other side of the bottom of the reaction tank 1, the condensing tank 16 is fixedly arranged on one end of the first delivery pipe 15, the delivery pump 17 is fixedly arranged on the top of the condensing tank 16, the second delivery pipe 18 is fixedly arranged on the top of the delivery pump 17, and the second delivery pipe 18 passes through the shell wall of the reaction tank 1 and is fixedly connected to one side of the top of the reaction tank 1;

[0025] In this embodiment, by setting the temperature detection device 13 and the condensation tank 16, the temperature detection device 13 detects the temperature change inside the reaction tank 1 in real time during use. When the temperature inside the reaction tank 1 is high, the delivery pump 17 is adjusted to allow the liquid inside the reaction tank 1 to enter the condensation tank 16 through the first delivery pipe 15 to cool down, and then be discharged into the reaction tank 1 through the second delivery pipe 18. This can not only reduce the temperature inside the reaction tank 1, but also circulate the liquid inside the reaction tank 1, thereby achieving the effect of controlling the temperature inside the reaction tank 1 and accelerating the reaction rate.

[0026] like Figure 2 As shown, the stirring assembly includes a motor 19, a rotating rod 20 and a stirring rod 21. The motor 19 is fixedly arranged in the middle of the top of the reaction tank 1, and the rotating rod 20 is rotatably arranged at the output end of the motor 19. A plurality of stirring rods 21 are fixedly arranged on the surface of the rotating rod 20. A protective shell 22 is fixedly arranged in the middle of the top of the reaction tank 1. The motor 19 is located inside the protective shell 22. A connecting pipe 23 is fixedly arranged in the middle of the bottom of the reaction tank 1. A fourth solenoid valve is fixedly arranged on the surface of the connecting pipe 23. Second support columns 24 are fixedly arranged on both sides of the connecting pipe 23. A filter tank 25 is fixedly arranged at the bottom end of the second support column 24. The middle of the top of the filter tank 25 is fixedly connected to the bottom end of the connecting pipe 23.

[0027] In this embodiment, by setting the motor 19, the rotating rod 20 and the stirring rod 21, when in use, the motor 19 drives the rotating rod 20 to rotate, and the rotating rod 20 drives the stirring rod 21 to stir the inside of the reaction tank 1, thereby achieving the effect of making the reaction inside the reaction tank 1 more sufficient. By setting the protective shell 22, when in use, it is possible to prevent the motor 19 from being damaged by the outside during use. By setting the connecting pipe 23 and the fourth solenoid valve, when in use, when the reaction inside the reaction tank 1 is completed, the fourth solenoid valve is opened to allow the terephthaloyl chloride crystals that have completed the reaction inside the reaction tank 1 and the remaining reaction solution to enter the filter tank 25 from the connecting pipe 23;

[0028] like Figure 1 and Figure 2 As shown, a filter tank 25 is provided with a filter tank 26 inside, and limit blocks 27 are fixedly arranged on both sides inside the filter tank 26, a fixed frame 28 is movably arranged on the top of the limit block 27, a first filter screen 29 is fixedly arranged on the bottom of the fixed frame 28, a pull rod 30 is fixedly arranged on the front of the fixed frame 28, a liquid discharge pipe 31 is fixedly arranged on one side of the filter tank 25, a touch display screen 32 is fixedly arranged on the front of the reaction tank 1, a second filter screen 33 is fixedly arranged inside the other end of the first delivery pipe 15, and a liquid level detection device 34 is fixedly arranged on the right side of the top inside the reaction tank 1;

[0029] In this embodiment, by setting the fixed frame 28 and the first filter screen 29, when in use, the terephthaloyl chloride crystals and the remaining reaction solution enter the fixed frame 28, the first filter screen 29 can separate the terephthaloyl chloride crystals and the remaining reaction solution, the remaining reaction solution enters the bottom end of the filter tank 25, and is discharged from the drain pipe 31, which is convenient for centralized collection and treatment. The pull rod 30 is pulled to take out the fixed frame 28, thereby achieving the effect of obtaining terephthaloyl chloride crystals with higher purity. By setting the touch display screen 32, the specific values ​​detected by the gas flow meter 4, the temperature detection device 13 and the weight detection device 10 can be displayed when in use, which is convenient for the operator to control the corresponding solenoid valve, thereby achieving It is convenient for the operator to adjust the effect of the overall device according to the actual situation during the reaction process. Through the setting of the second filter 33, when terephthaloyl chloride crystals are generated during the reaction process inside the reaction tank 1, the second filter 33 can isolate the terephthaloyl chloride crystals inside the reaction tank 1, thereby achieving the effect of preventing the terephthaloyl chloride crystals from entering the delivery pump 17 and causing damage to the delivery pump 17. Through the liquid level detection device 34, when the reaction liquid inside the reaction tank 1 exceeds a certain level, the liquid level detection device 34 can sound an alarm to remind the operator, thereby achieving the effect of preventing the reaction liquid inside the reaction tank 1 from flooding the second delivery pipe 18 and causing the internal reaction liquid to be unable to circulate.

[0030] Working principle: through the setting of the gas flow meter 4 and the first solenoid valve 3, when it is necessary to add phosgene to the inside of the reaction tank 1, the gas flow meter 4 can detect the specific amount of phosgene delivered. When the phosgene delivery amount reaches a certain standard, the first solenoid valve 3 is closed. Through the setting of the weight detection device 10, the second solenoid valve 9 and the third solenoid valve 12, when it is necessary to add toluene to the inside of the reaction tank 1, the second solenoid valve 9 is opened, and the toluene in the liquid storage tank 7 enters the inside of the feed hopper 11. The weight detection device 10 detects the weight change inside the feed hopper 11 in real time. When the weight inside the feed hopper 11 reaches a certain standard, the second solenoid valve 9 is closed, and the third solenoid valve 12 is opened, so that the toluene in the feed hopper 11 enters the inside of the reaction tank 1, thereby achieving precise control. The amount of phosgene and toluene added in the reaction can avoid the effect of insufficient reaction. At the same time, through the arrangement of the temperature detection device 13 and the condensation tank 16, the temperature detection device 13 detects the temperature change inside the reaction tank 1 in real time during use. When the temperature inside the reaction tank 1 is high, the delivery pump 17 is adjusted to allow the liquid inside the reaction tank 1 to enter the condensation tank 16 through the first delivery pipe 15 to cool down, and then be discharged into the reaction tank 1 through the second delivery pipe 18. This can not only reduce the temperature inside the reaction tank 1, but also circulate the liquid inside the reaction tank 1, thereby achieving the effect of controlling the temperature inside the reaction tank 1 and accelerating the reaction rate. Through the arrangement of the motor 19, the rotating rod 20 and the stirring rod 21, when in use, the motor 19 drives the rotating rod 20 to rotate, and the rotating rod 20 drives the stirring rod 21 to rotate in the opposite direction. The inside of the reaction tank 1 is stirred, so as to achieve the effect of making the reaction inside the reaction tank 1 more complete. By setting the protective shell 22, the motor 19 can be prevented from being damaged by the outside during use. By setting the connecting pipe 23 and the fourth solenoid valve, when the reaction inside the reaction tank 1 is completed, the fourth solenoid valve is opened to allow the terephthaloyl chloride crystals and the remaining reaction solution that have completed the reaction inside the reaction tank 1 to enter the filter tank 25 from the connecting pipe 23. By setting the fixing frame 28 and the first filter screen 29, the terephthaloyl chloride crystals and the remaining reaction solution enter the fixing frame 28 when in use. The first filter screen 29 can separate the terephthaloyl chloride crystals and the remaining reaction solution, and the remaining reaction solution enters the bottom of the filter tank 25. , discharged from the drain pipe 31, convenient for centralized collection and treatment, and then the pull rod 30 is pulled to take out the fixed frame 28, thereby achieving the effect of obtaining terephthaloyl chloride crystals with higher purity. Through the setting of the touch display screen 32, the specific values ​​detected by the gas flow meter 4, the temperature detection device 13 and the weight detection device 10 can be displayed when used, which is convenient for the operator to control the corresponding solenoid valve, thereby achieving the effect of facilitating the operator to adjust the overall device according to the actual situation during the reaction process. Through the setting of the second filter 33, when terephthaloyl chloride crystals are generated during the reaction process inside the reaction tank 1, the second filter 33 can isolate the terephthaloyl chloride crystals inside the reaction tank 1, thereby preventing the terephthaloyl chloride crystals from entering the inside of the delivery pump 17.The liquid level detection device 34 can sound an alarm to remind the operator when the reaction liquid in the reaction tank 1 exceeds a certain level, thereby preventing the reaction liquid in the reaction tank 1 from flooding the second delivery pipe 18 and causing the internal reaction liquid to be unable to circulate.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A mixer for preparing terephthaloyl chloride from phosgene, characterized in that: It comprises a reaction tank (1), an air inlet pipe (2) is fixedly arranged on one side of the reaction tank (1), a first solenoid valve (3) is fixedly arranged on the surface of the air inlet pipe (2), a gas flow meter (4) is fixedly arranged on one side of the first solenoid valve (3), a liquid inlet pipe (5) is fixedly arranged on the right side of the top of the reaction tank (1), first support columns (6) are fixedly arranged on both sides of the liquid inlet pipe (5), a liquid storage tank (7) is fixedly arranged on the top of the first support column (6), a liquid outlet pipe (8) is fixedly arranged at the bottom of the liquid storage tank (7), a second solenoid valve (9) is fixedly arranged on the surface of the liquid outlet pipe (8), a weight detection device (10) is fixedly arranged on both sides of the liquid outlet pipe (8), a feed hopper (11) is fixedly arranged at the bottom of the weight detection device (10), and a third solenoid valve (12) is fixedly arranged on the bottom surface of the feed hopper (11); A stirring assembly is fixedly arranged in the middle of the top end of the reaction tank (1); a temperature detection device (13) is fixedly arranged on one side of the bottom end of the reaction tank (1); a temperature adjustment assembly (14) is fixedly arranged on the other side of the reaction tank (1); the temperature adjustment assembly (14) comprises a first delivery pipe (15), a condensation tank (16), a delivery pump (17) and a second delivery pipe (18); a first delivery pipe (15) is fixedly arranged on the other side of the bottom end of the reaction tank (1); a condensation tank (16) is fixedly arranged on one end of the first delivery pipe (15); a delivery pump (17) is fixedly arranged on the top end of the condensation tank (16); a second delivery pipe (18) is fixedly arranged on the top end of the delivery pump (17); the second delivery pipe (18) passes through the shell wall of the reaction tank (1) and is fixedly connected to one side of the top end of the reaction tank (1).

2. The mixer for preparing terephthaloyl chloride from phosgene according to claim 1, characterized in that: The stirring assembly comprises a motor (19), a rotating rod (20) and a stirring rod (21); the motor (19) is fixedly arranged in the middle of the top end of the reaction tank (1); the rotating rod (20) is rotatably arranged at the output end of the motor (19); and a plurality of stirring rods (21) are fixedly arranged on the surface of the rotating rod (20).

3. A phosgene preparation terephthaloyl chloride mixer according to claim 2, characterized in that: A protective shell (22) is fixedly disposed in the middle of the top of the reaction tank (1), and the motor (19) is located inside the protective shell (22).

4. The mixer for preparing terephthaloyl chloride from phosgene according to claim 1, characterized in that: A connecting pipe (23) is fixedly arranged in the middle of the bottom end of the reaction tank (1), a fourth solenoid valve is fixedly arranged on the surface of the connecting pipe (23), second support columns (24) are fixedly arranged on both sides of the connecting pipe (23), a filter tank (25) is fixedly arranged at the bottom end of the second support column (24), and the middle of the top end of the filter tank (25) is fixedly connected to the bottom end of the connecting pipe (23).

5. A phosgene preparation terephthaloyl chloride mixer according to claim 4, characterized in that: A filter tank (26) is provided inside the filter tank (25), and limit blocks (27) are fixedly provided on both sides of the filter tank (26). A fixed frame (28) is movably provided at the top of the limit block (27), and a first filter screen (29) is fixedly provided at the bottom of the fixed frame (28). A pull rod (30) is fixedly provided on the front of the fixed frame (28), and a liquid discharge pipe (31) is fixedly provided on one side of the filter tank (25).

6. The mixer for preparing terephthaloyl chloride from phosgene according to claim 1, characterized in that: A touch display screen (32) is fixedly arranged on the front of the reaction tank (1), a second filter screen (33) is fixedly arranged inside the other end of the first delivery pipe (15), and a liquid level detection device (34) is fixedly arranged on the right side of the top end inside the reaction tank (1).

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