A decomposition reactor for producing crude phenol and a method of using the same

Abstract

The invention discloses an environmentally friendly and efficient decomposition reactor for producing crude phenol and a method for using the reactor, which belongs to the field of chemical production equipment. The reactor is provided with a shell, a driving motor and an acid adding pipe. The acid outlet of the acid adding pipe is extended to the middle and lower part of the shell, so that the crude phenol generation amount can be better maximized. In actual production, due to the cooling medium inlet and cooling medium outlet on the shell, and the cooling pipe connected between the two, the cooling pipe is arranged inside the shell. The cooling pipe is used to directly act on the liquid inside the shell, so that the cooling efficiency can be greatly improved. At the same time, the driving motor drives the stirring shaft and the stirring blade to rotate through the transmission component. When used in combination with the cooling pipe, the temperature of the internal liquid can be uniformized to prevent the temperature difference from affecting the production, and at the same time, the amount of liquid directly acted on by the cooling pipe can be increased.

Description

[0001] The invention relates to the technical field of chemical production equipment, and in particular to an environmentally friendly and efficient decomposition reactor for producing crude phenol and a use method thereof. Background Art

[0002] The crude phenol production unit is one of the important components in the coal tar processing and production process. The decomposition reactor is the main equipment of the crude phenol production unit. It is a container used for the decomposition reaction between strong acid and sodium phenol salt produced in the coal tar processing and production process to obtain crude phenol.

[0003] At present, the decomposition reaction is mainly completed on-site manually. The on-site operator will add strong acid into the reactor to react chemically with coal tar, and use the jacket on the outside to cool the surface of the reactor. However, the internal heat cannot be dissipated, so that the generated crude phenol is eventually lost with the air. The traditional technology used in the acid addition process is to manually pour it into the reactor. Since the obtained crude phenol will float on the top of the mixed liquid, the added acid needs enough time to completely react the coal tar below the crude phenol with these acid solutions. The reaction efficiency is low, which is not conducive to production. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art, and therefore an environmentally friendly and efficient decomposition reactor and a method of use for producing crude phenol are proposed, which greatly improves production efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An environmentally friendly and efficient decomposition reactor for producing crude phenol comprises a shell, an acid addition pipe, a driving motor and a stirring shaft. A cooling medium inlet and a cooling medium outlet are provided on the shell, a cooling pipe is connected between the cooling medium inlet and the cooling medium outlet, the cooling pipe is arranged inside the shell, the acid addition pipe is arranged on the shell and one end extends to the middle and lower part of the shell, the driving motor is installed on the top of the shell, the output end of the driving motor is connected to a transmission component, the stirring shaft is arranged on the inner side of the shell, a stirring blade is fixedly connected to the stirring shaft, and the driving motor drives the stirring shaft and the stirring blade to rotate through the transmission component to achieve full mixing of the liquid inside the shell.

[0007] In a further preferred embodiment, the cooling pipe is distributed in a spiral shape on the periphery of the stirring blade, and the flow direction of the cooling medium in the cooling pipe is from bottom to top.

[0008] In a further preferred solution, an anti-vortex plate is provided at the inner bottom of the shell, and a cross-shaped spoiler is fixedly connected to the upper surface of the anti-vortex plate.

[0009] According to a further preferred embodiment, a collecting chamber is additionally provided on the top of the shell, an air inlet pipe and an air outlet pipe are provided on the collecting chamber, a fan is provided in the air inlet pipe, a nozzle and a partition are provided in the collecting chamber, the partition is obliquely arranged below the nozzle and between the air inlet pipe and the air outlet pipe, a movable cleaning cylinder is provided on the partition, a filter plate layer is provided at the free end of the partition, a servo motor and a discharge port are provided at the bottom of the side wall of the collecting chamber, the output end of the servo motor is connected to a screw conveying rod, and the screw conveying rod is arranged inside the collecting chamber.

[0010] According to a further preferred embodiment, the transmission assembly includes a first transmission wheel, a pressure plate, a sleeve, a second transmission wheel, a spline and a roller. The first transmission wheel and the pressure plate are fixedly connected to the output end of the drive motor. The upper surface of the pressure plate is an inclined surface. The sleeve is fixed to the shell and is sleeved on the outer side of the stirring shaft. The sleeve is slidingly matched with the stirring shaft. The second transmission wheel is rotatably connected to the sleeve. The second transmission wheel forms a transmission fit with the first transmission wheel. A spline hole is provided on the second transmission wheel. The spline is arranged on the stirring shaft. The spline is adapted to the spline hole and the two are slidingly matched. The roller is arranged on the top of the stirring shaft and fits with the upper surface of the pressure plate.

[0011] In a further preferred embodiment, a connecting rod is fixedly connected to the stirring shaft, and an impeller is provided on the connecting rod, which rotates in the opposite direction to the stirring blade.

[0012] A method for using an environmentally friendly and efficient decomposition reactor for producing crude phenol comprises the following steps:

[0013] S1, first inject a certain amount of coal tar into the shell 1, and pass acid into the acid adding pipe to the middle and lower part of the inner side of the shell at a certain flow rate, and start the drive motor at the same time;

[0014] S2, the output shaft of the driving motor drives the first transmission wheel and the pressure plate to rotate, and the second transmission wheel rotates synchronously with the first transmission wheel. At the same time, the pressure plate acts on the roller on the stirring shaft to achieve up and down reciprocating motion. When the stirring shaft and the stirring blade rotate, the impeller also rotates to accelerate the flow of liquid near the cooling pipe. At the same time, the cooling medium enters the cooling pipe from the cooling medium inlet, thereby accelerating the cooling of the liquid inside the reactor, and then is discharged from the cooling medium outlet;

[0015] S3. At the same time, the collection chamber on the top of the shell allows the phenolic substances carried away in the gas to enter the collection chamber under the action of the fan, and the nozzle sprays atomized liquid to capture the phenols in the air. Under the action of the filter plate layer, filtration and deodorization are achieved, and the servo motor at the bottom will drive the spiral conveying rod to accelerate the discharge of the filtrate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a shell, a driving motor and an acid adding pipe. The acid outlet of the acid adding pipe is extended to the middle and lower part of the shell, so that the crude phenol production can be better maximized. In actual production, due to the cooling medium inlet and cooling medium outlet on the shell, and the cooling pipe connected therebetween, the cooling pipe is arranged inside the shell. The cooling pipe is used to directly act on the liquid inside the shell, so that the cooling efficiency can be greatly improved. At the same time, the driving motor drives the stirring shaft and the stirring blades to rotate through the transmission component. When used in combination with the cooling pipe, the internal liquid temperature can be uniformed to prevent temperature differences from affecting production, and at the same time, the amount of liquid directly acted on by the cooling pipe can be increased.

[0018] The present invention provides a collecting chamber on the shell, and utilizes the fan provided in the air inlet on the collecting chamber to draw the gasified material generated inside the shell through the loss of high-temperature gas into the collecting chamber, and utilizes the internal spray head to effectively capture the gasified material, and flows along the partition to the filter plate layer for filtering and deodorization, and then the gas is discharged through the air outlet pipe, and the filtered liquid is discharged by the spiral conveying rod driven by the servo motor.

[0019] The transmission assembly provided in the present invention includes a first transmission wheel, a pressure plate, a sleeve, a second transmission wheel, a spline and a roller. The first transmission wheel and the second transmission wheel are engaged with each other, thereby driving the stirring shaft to rotate. At the same time, the pressure plate uses the inclined surface of the upper surface to squeeze the roller so that the stirring shaft can reciprocate up and down according to the inclined surface of the pressure plate, thereby accelerating the flow of the internal liquid to achieve a rapid cooling effect, while ensuring that the internal acid liquid and the coal-based liquid are fully mixed to obtain crude phenol. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the collecting chamber in the present invention;

[0022] Figure 3 It is a connection diagram of the partition and the cleaning cylinder in the present invention.

[0023] In the figure: 1. shell; 2. acid adding pipe; 3. driving motor; 4. stirring shaft; 5. cooling pipe; 6. stirring blade; 7. anti-vortex plate; 8. collecting chamber; 9. air inlet pipe; 10. air outlet pipe; 11. nozzle; 12. partition; 13. fan; 14. cleaning cylinder; 15. filter plate layer; 16. servo motor; 17. discharge port; 18. screw conveying rod; 19. first transmission wheel; 20. pressure plate; 21. sleeve; 22. second transmission wheel; 23. roller; 24. connecting rod; 25. impeller. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 a limitation on the present invention. Example 1

[0026] An environmentally friendly and efficient decomposition reactor for producing crude phenol comprises a shell 1, an acid adding pipe 2, a driving motor 3 and a stirring shaft 4. The shell 1 is provided with a cooling medium inlet and a cooling medium outlet, a cooling pipe 5 is connected between the cooling medium inlet and the cooling medium outlet, the cooling pipe 5 is arranged inside the shell 1, the acid adding pipe 2 is arranged on the shell 1 and one end extends to the middle and lower part of the shell 1, the driving motor 3 is installed on the top of the shell 1, the output end of the driving motor 3 is connected with a transmission assembly, the stirring shaft 4 is arranged on the inner side of the shell 1, the stirring shaft 4 is fixedly connected with a stirring blade 6, and the driving motor 3 drives the stirring shaft 4 and the stirring blade 6 to rotate through the transmission assembly to achieve full mixing of the liquid inside the shell 1. Since the acid adding pipe 2 is inserted into the middle and lower part of the shell 1, it is convenient for the acid liquid to have a full chemical reaction with the liquid. The cooling pipe 5 is used in conjunction with the stirring blade 6. When the liquid inside the shell 1 is fully mixed (to ensure the yield of crude phenol), the flow rate of the liquid can also be accelerated, thereby achieving an excellent cooling effect.

[0027] In the present embodiment, a further preferred solution is that, since the starting point of the chemical reaction occurs in the lower middle part of the shell, the cooling pipe 5 is distributed in a spiral shape on the periphery of the stirring blade 6, and the flow direction of the cooling medium in the cooling pipe 5 is from bottom to top, which greatly improves the cooling effect.

[0028] In the present embodiment, a further preferred solution is that an anti-vortex plate 7 is provided at the inner bottom of the shell 1, and a cross-shaped spoiler is fixedly connected to the upper surface of the anti-vortex plate 7. The anti-vortex plate 7 at the bottom can disrupt the flow direction of the bottom liquid to prevent the occurrence of vortices that are not conducive to crude phenol production. Example 2

[0029] Based on the further optimization of the embodiment 1, a collecting chamber 8 is added to the top of the shell 1, and a trumpet-shaped air inlet pipe 9 and an air outlet pipe 10 are provided on the collecting chamber 8, and a fan 13 is provided in the air inlet pipe 9, and a nozzle 11 and a partition 12 are provided in the collecting chamber 8. The liquid sprayed by the nozzle 11 can effectively capture the gasified material in an all-round way to obtain a mixed liquid. The partition 12 is tilted below the nozzle 11 and is located between the air inlet pipe 9 and the air outlet pipe 10. A movable cleaning cylinder 14 is provided on the partition 12 (a handle is provided on one side of the cleaning cylinder 14, and the handle is located on the outer side of the shell for easy operation. The cleaning cylinder 14 is on the partition 12 A sealing bellows is provided at the movable gap on the upper side), the liquid on the surface of the partition 12 can be cleaned by a cleaning cylinder 14, and a filter plate layer 15 (including a filter layer and a deodorizing layer) is provided at the free end of the partition 12. The filter plate layer 15 can be used to effectively filter and deodorize the turbid mixed liquid and then discharge it from the outlet pipe 10. A servo motor 16 and a discharge port 17 are provided at the bottom of the side wall of the collecting chamber 8, and the inner bottom is inclined to facilitate discharge. The output end of the servo motor 16 is connected to a screw conveying rod 18, which is arranged inside the collecting chamber 8. The screw conveying rod 18 can be used to quickly discharge the internal liquid. Example 3

[0030] Further optimized on the basis of Example 1, the transmission assembly includes a first transmission wheel 19, a pressure plate 20, a sleeve 21, a second transmission wheel 22, a spline and a roller 23. The first transmission wheel 19 and the pressure plate 20 are fixedly connected to the output end of the drive motor 3. The upper surface of the pressure plate 20 is an inclined surface. The sleeve 21 is fixedly arranged on the shell 1 and is sleeved on the outer side of the stirring shaft 4. The sleeve 21 and the stirring shaft 4 are in a sliding fit. The second transmission wheel 22 is rotatably connected to the top of the sleeve 21. The second transmission wheel 22 forms a transmission fit with the first transmission wheel 19. A spline hole is opened on the second transmission wheel 22. The spline is arranged on the stirring shaft 4. The spline and the spline hole are adapted to each other and the two are in a sliding fit. The roller 23 is arranged on the top of the stirring shaft 4 and fits with the upper surface of the pressure plate 20. The first transmission wheel 19 and the pressure plate 20 are driven to rotate by the driving motor 3. The first transmission wheel 19 drives the second transmission wheel 22 to rotate, so that the stirring shaft 4 and the stirring blade 16 rotate. The pressure plate 20 uses the inclined surface of the upper surface to act on the roller 23 to make the stirring shaft 4 reciprocate up and down, thereby ensuring the mixing efficiency and the cooling effect of the cooling tube.

[0031] In a further preferred solution of this embodiment, a connecting rod 24 is fixedly connected to the stirring shaft 4, and an impeller 25 is provided on the connecting rod 24, which rotates in the opposite direction to the stirring blade 6. The impeller 25 also rotates when the stirring shaft 4 rotates and moves up and down, so that the flow rate of the liquid near the cooling pipe 5 is increased, and its cooling efficiency is further improved.

[0032] The present invention can be implemented in actual production as follows: first, acid liquid is introduced into the shell 1 containing the crude phenol liquid to be extracted through the acid adding pipe 2 (to control the flow rate), the driving motor 3 is started, and the first transmission wheel 19 is used to drive the second transmission wheel 22 to rotate. At the same time, the pressure plate 20 acts on the roller 23 of the stirring shaft 4 to achieve up and down reciprocating motion. When the stirring shaft 4 and the stirring blade 6 rotate, the impeller 25 also rotates to accelerate the flow of liquid near the cooling pipe 5. At the same time, the cooling medium enters the cooling pipe 5 from the cooling medium inlet to achieve the effect of accelerating the cooling of the internal liquid. At the same time, the collection chamber 8 at the top of the shell 1 allows the phenolic substances carried away in the gas to enter the collection chamber 8 under the action of the fan 13, and the nozzle 11 sprays atomized liquid to capture phenols in the air. Under the action of the filter plate layer 15, filtering and deodorization are achieved, and the servo motor 16 at the bottom will drive the spiral conveying rod 18 to accelerate the discharge of the filtrate. Example 4

[0033] A method for using an environmentally friendly and efficient decomposition reactor for producing crude phenol comprises the following steps:

[0034] S1, first inject a certain amount of coal tar into the shell 1, and pass the acid solution into the acid adding pipe 2 to the middle and lower part of the inner side of the shell 1 at a certain flow rate, and start the driving motor 3 at the same time;

[0035] S2, the output shaft of the driving motor 3 drives the first transmission wheel 19 and the pressure plate 20 to rotate, and the second transmission wheel 22 rotates synchronously with the first transmission wheel 19. At the same time, the pressure plate 20 acts on the roller on the stirring shaft 4 to achieve up and down reciprocating motion. When the stirring shaft 4 and the stirring blade 6 rotate, the impeller 25 also rotates to accelerate the flow of the liquid near the cooling pipe 5. At the same time, the cooling medium enters the cooling pipe 5 from the cooling medium inlet, thereby accelerating the cooling of the liquid inside the reactor, and then is discharged from the cooling medium outlet;

[0036] S3. At the same time, the collecting chamber 8 at the top of the shell 1 allows the phenolic substances carried away in the gas to enter the collecting chamber 8 under the action of the fan 13, and the nozzle 11 sprays atomized liquid to capture the phenols in the air. Under the action of the filter plate layer 15, filtering and deodorization are achieved, and the servo motor 16 at the bottom will drive the spiral conveying rod 18 to accelerate the discharge of the filtrate.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A method for using a decomposition reactor for producing crude phenol, characterized in that: The decomposition reactor comprises a shell (1), an acid addition pipe (2), a driving motor (3) and a stirring shaft (4); the shell (1) is provided with a cooling medium inlet and a cooling medium outlet; a cooling pipe (5) is connected between the cooling medium inlet and the cooling medium outlet; the cooling pipe (5) is arranged inside the shell (1); the acid addition pipe (2) is arranged on the shell (1) and one end thereof extends to the middle and lower part of the shell (1); the driving motor (3) is mounted on the top of the shell (1); the output end of the driving motor (3) is connected to a transmission assembly; the stirring shaft (4) is arranged on the inner side of the shell (1); a stirring blade (6) is fixedly connected to the stirring shaft (4); the driving motor (3) drives the stirring shaft (4) and the stirring blade (6) to rotate through the transmission assembly to achieve full mixing of the liquid inside the shell (1); The cooling pipe (5) is distributed in a spiral shape on the periphery of the stirring blade (6), and the flow direction of the cooling medium in the cooling pipe (5) is from bottom to top; The stirring shaft (4) is fixedly connected to a connecting rod (24), and the connecting rod (24) is provided with an impeller (25) that rotates in the opposite direction to the stirring blade (6); A collecting chamber (8) is additionally provided on the top of the shell (1), an air inlet pipe (9) and an air outlet pipe (10) are provided on the collecting chamber (8), a fan (13) is provided in the air inlet pipe (9), a nozzle (11) and a partition (12) are provided in the collecting chamber (8), the partition (12) is obliquely arranged below the nozzle (11) and between the air inlet pipe (9) and the air outlet pipe (10), a movable cleaning cylinder (14) is provided on the partition (12), a filter plate layer (15) is provided at the free end of the partition (12), a servo motor (16) and a discharge port (17) are provided at the bottom of the side wall of the collecting chamber (8), the output end of the servo motor (16) is connected to a screw conveying rod (18), and the screw conveying rod (18) is arranged inside the collecting chamber (8); The transmission assembly comprises a first transmission wheel (19), a pressure plate (20), a sleeve (21), a second transmission wheel (22), a spline and a roller (23); the first transmission wheel (19) and the pressure plate (20) are both fixedly connected to the output end of the drive motor (3); the upper surface of the pressure plate (20) is an inclined surface; the sleeve (21) is fixed to the housing (1) and sleeved on the outer side of the stirring shaft (4); the sleeve (21) and the stirring shaft (4) are slidably matched; the second transmission wheel (22) is rotatably connected to the sleeve (21); the second transmission wheel (22) and the first transmission wheel (19) form a transmission match; a spline hole is formed on the second transmission wheel (22); the spline is arranged on the stirring shaft (4); the spline is adapted to the spline hole and the two are slidably matched; the roller (23) is arranged on the top of the stirring shaft (4) and is in contact with the upper surface of the pressure plate (20); The method comprises the following steps: S1, firstly injecting coal tar into the shell (1), passing acid liquid into the acid adding pipe (2) to the middle and lower part of the inner side of the shell (1), and starting the driving motor (3); S2, the output shaft of the driving motor (3) drives the first transmission wheel (19) and the pressure plate (20) to rotate, and the second transmission wheel (22) rotates synchronously with the first transmission wheel (19). At the same time, the pressure plate (20) acts on the roller (23) on the stirring shaft (4) to achieve up and down reciprocating motion. When the stirring shaft (4) and the stirring blade (6) rotate, the impeller (25) also rotates to accelerate the flow of liquid near the cooling pipe (5). At the same time, the cooling medium enters the cooling pipe (5) from the cooling medium inlet to accelerate the cooling of the liquid inside the reactor, and then is discharged from the cooling medium outlet; S3. At the same time, the collecting chamber (8) at the top of the housing (1) is driven by the fan (13) so that the phenolic substances carried away in the gas enter the collecting chamber (8). The nozzle (11) sprays atomized liquid to capture the phenolic substances in the air, and the filtration and deodorization are achieved under the action of the filter plate layer (15). The servo motor (16) at the bottom drives the spiral conveying rod (18) to accelerate the discharge of the filtrate.

2. The method for using a decomposition reactor for producing crude phenol according to claim 1, characterized in that: An anti-vortex plate (7) is provided at the inner bottom of the shell (1), and a cross-shaped spoiler is fixedly connected to the upper surface of the anti-vortex plate (7).

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