A catalytic device for the preparation of n-butyl acetate

Abstract

The utility model discloses a kind of catalytic apparatus for preparing n-butyl acetate, it is related to catalytic apparatus technical field, including processing bin, the inside fixedly connected with catalyst base plate of processing bin, the side of processing bin is provided with feeding mechanism.The utility model is filled with solid catalyst catalyst tank, by quantitative cylinder opening quantitative sliding door, it can be filled with quantitative tank, by feeding cylinder opening feeding door, it can be filled with catalyst inside quantitative tank on the surface of catalyst base plate, by scraping cylinder driving scraper and rake tooth, the catalyst of accumulation can be scraped and spread, more conducive to processing raw materials and catalyst to be fully contacted and react, each cylinder is provided with electromagnetic positioner, can be realized automatic control by control box and solenoid valve, more in line with the trend of modernization industrial development, improve the adaptability of device.

Description

Technical Field

[0001] This utility model relates to the field of catalytic device technology, specifically to a catalytic device for preparing n-butyl acetate. Background Technology

[0002] The industrial production of n-butyl acetate typically involves the esterification reaction of acetic acid and n-butanol under catalysis. In this process, the catalytic unit is the core equipment, its main function being to provide a site for the reaction and to carry the catalyst to accelerate the reaction process. Traditional catalytic units are usually fixed-bed reactors, filled with solid acid catalysts, where the reactants undergo conversion as they flow through the catalyst bed. This type of unit forms the basis of existing catalytic technologies.

[0003] Patent publication number CN211412041U discloses a catalytic device for the preparation of isooctane. A rotating sleeve is fixedly mounted on the upper surface of the base plate via several supporting legs. A rotating part is rotatably mounted inside the rotating sleeve. An installation sleeve is fixedly mounted on the top of the rotating part. A barrel body is provided inside the installation sleeve. A barrel cover is threaded onto the top of the barrel body. A feed pipe and a handle are fixedly mounted on the barrel cover. A pipe cap is threaded onto the top of the feed pipe. A telescopic column is movably mounted on the upper surface of the base plate via a limiting mechanism. A connecting rod is hinged between one end of the telescopic column and the bottom of the rotating part. A drive motor is fixedly mounted on the upper surface of the base plate via a support mechanism. The other end of the telescopic column is driven by the output shaft of the drive motor via a transmission mechanism.

[0004] To address the issue of poor catalytic performance, existing technologies employ a drive motor to rotate the tank via a transmission mechanism. This rotation, combined with blades on the inner wall of the tank, facilitates the process. However, this approach still results in catalyst replacement that is not quick or convenient enough, thus impacting processing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a catalytic device for preparing n-butyl acetate, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A catalytic device for preparing n-butyl acetate includes a processing chamber, a catalyst base plate fixedly connected inside the processing chamber, a feeding mechanism on one side of the processing chamber, a slag removal mechanism on the side of the processing chamber away from the feeding mechanism, and a control unit at one end of the processing chamber.

[0007] The feeding mechanism includes a feeding channel and a leveling cylinder. One end of the rod chamber of the leveling cylinder is fixedly connected to the end of the processing chamber away from the control unit. One end of the feeding channel is fixedly connected to the side of the processing chamber away from the slag removal mechanism. A metering box is fixedly connected to the top of the feeding channel. A catalyst box is fixedly connected to the top of the metering box. The catalyst box, the metering box, and the inner cavity of the feeding channel are connected to the interior of the processing chamber.

[0008] A further improvement of the present invention is that a metering cylinder and a feeding cylinder are fixedly connected to one side of the metering box, and the piston rods of the metering cylinder and the feeding cylinder extend into the interior of the metering box and are respectively fixedly connected to a metering sliding door and a feeding door.

[0009] A further improvement of this utility model is that: the two sides of the quantitative sliding door are slidably connected to the two sides of the top inside of the quantitative box, the two sides of the feeding door are slidably connected to the two sides of the bottom inside of the quantitative box, and a limit block is fixedly connected to one end of both the quantitative sliding door and the feeding door.

[0010] A further improvement of this utility model is that: the piston rod end of the scraping cylinder extends into the interior of the processing chamber and is fixedly connected to a scraper, and a number of rake teeth are fixedly connected to the bottom of the scraper, with the bottom ends of the rake teeth movably connected to the surface of the catalyst bottom plate.

[0011] A further improvement of this utility model is that the slag removal mechanism includes a slag removal cylinder, a slag removal door, and a waste collection box. One end of the slag removal cylinder is fixedly connected to the side of the processing chamber away from the feeding mechanism. The piston rod of the slag removal cylinder extends into the interior of the processing chamber and is fixedly connected to a push plate. A hard brush is fixedly connected to the bottom of the push plate. The bottom end of the hard brush is movably connected to the surface of the catalyst bottom plate. The top of the slag removal door is rotatably connected to one side of the processing chamber. A waste collection box is movably connected to the outside of one side of the processing chamber.

[0012] A further improvement of this utility model's technical solution is that: the control unit includes a control box, one side of which is fixedly connected to the other end of the processing chamber; the surface of the control box is provided with a control panel and the interior employs a programmable logic controller; four solenoid valves are fixedly installed on the top of the control box; each of the four solenoid valves is connected to and drives a metering cylinder, a feeding cylinder, a leveling cylinder, and a slag removal cylinder respectively through an air pipe; a pair of electromagnetic limiters are fixedly installed on the cylinder body surface of each of the metering cylinder, feeding cylinder, leveling cylinder, and slag removal cylinder; and each of the solenoid valves and electromagnetic limiters is signal-connected to the control box.

[0013] A further improvement of this utility model is that the surface of the catalyst base plate is provided with several through holes.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: This invention provides a catalytic device for preparing n-butyl acetate. Through the coordination of a catalyst box, a metering box, a metering cylinder, a feeding cylinder, a metering sliding door, and a feeding door, the catalyst box is filled with solid catalyst. The metering cylinder opens the metering sliding door to fill the metering box, and the feeding cylinder opens the feeding door to pour the catalyst from inside the metering box onto the surface of the catalyst base plate. A leveling cylinder drives a scraper and rake teeth to level and spread the accumulated catalyst, facilitating better contact and reaction between the raw materials and the catalyst. Each cylinder is equipped with an electromagnetic limiter, enabling automated control via a control box and solenoid valves. This design aligns with modern industrial development trends and enhances the adaptability of the device.

[0015] This invention provides a catalytic device for the preparation of n-butyl acetate. Through the cooperation of a slag removal cylinder, a pusher plate, a hard brush, a slag removal door, and a waste collection box, starting the slag removal cylinder drives the pusher plate and hard brush to move linearly, pushing the deactivated catalyst through the slag removal door into the waste collection box. Simultaneously, the hard brush removes debris from the holes in the catalyst bottom plate, preventing blockage. All driving components of the entire device are cylinders, resulting in low cost and good performance. When used in conjunction with a feeding mechanism, it can automatically remove catalyst waste and feed, improving the device's convenience. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the feeding mechanism of this utility model; Figure 4 This is a schematic diagram of the feeding mechanism and slag removal mechanism of this utility model.

[0017] In the diagram: 1. Processing chamber; 11. Catalyst base plate; 2. Feeding mechanism; 21. Catalyst box; 22. Metering box; 23. Metering cylinder; 24. Feeding cylinder; 25. Metering sliding door; 26. Feeding door; 27. Limit block; 28. Scraping cylinder; 29. ​​Scraper; 210. Rake teeth; 211. Feeding channel; 3. Slag removal mechanism; 31. Slag removal cylinder; 32. Push plate; 33. Hard brush; 34. Slag removal door; 35. Waste collection box; 4. Control unit; 41. Control box; 42. Solenoid valve; 43. Solenoid limiter. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to embodiments: Example 1 like Figure 1-4 As shown, this utility model provides a catalytic device for preparing n-butyl acetate, including a processing chamber 1. A catalyst base plate 11 is fixedly connected inside the processing chamber 1. A feeding mechanism 2 is provided on one side of the processing chamber 1, and a slag removal mechanism 3 is provided on the side of the processing chamber 1 away from the feeding mechanism 2. A control unit 4 is provided at one end of the processing chamber 1. The feeding mechanism 2 includes a feeding channel 211 and a leveling cylinder 28. One end of the rod chamber of the leveling cylinder 28 is fixedly connected to the end of the processing chamber 1 away from the control unit 4. One end of the feeding channel 211 is fixedly connected to the side of the processing chamber 1 away from the slag removal mechanism 3. A metering box 22 is fixedly connected to the top of the feeding channel 211, and a catalyst box 21 is fixedly connected to the top of the metering box 22. The catalyst box 21, the metering box 22, and the feeding channel 211 are all connected together. The inner cavity of 11 is connected to the interior of the processing chamber 1. A metering cylinder 23 and a feeding cylinder 24 are fixedly connected to one side of the metering box 22. The piston rod ends of the metering cylinder 23 and the feeding cylinder 24 extend into the interior of the metering box 22 and are respectively fixedly connected to a metering sliding door 25 and a feeding door 26. The two sides of the metering sliding door 25 are slidably connected to the top two sides of the interior of the metering box 22, and the two sides of the feeding door 26 are slidably connected to the bottom two sides of the interior of the metering box 22. A limit block 27 is fixedly connected to one end of the metering sliding door 25 and the feeding door 26. The piston rod end of the leveling cylinder 28 extends into the interior of the processing chamber 1 and is fixedly connected to a scraper 29. Several rake teeth 210 are fixedly connected to the bottom of the scraper 29, and the bottom ends of the several rake teeth 210 are movably connected to the surface of the catalyst bottom plate 11.

[0019] In this embodiment, the device can be used in conjunction with an esterification tower for n-butyl acetate. Raw materials (acetic acid and n-butanol, both in liquid state during processing) are fed above the esterification tower and reacted by mixing, heating, and contacting the catalyst (solid granules). The cylinders in this device are supplied with gas via an external air compressor. The cylinders are connected to the air compressor via air pipes and solenoid valves 42. Air compressors are readily available and mature technology, commonly used in factories, and will not be described in detail here. Before use, the catalyst tank 21 is filled with solid catalyst. The piston rod of the metering cylinder 23 pushes the metering sliding door 25, filling the metering tank 22. A limit block 27 physically limits the metering sliding door 25 to prevent it from sliding off the track. The maximum capacity of the metering tank 22 should be sufficient for at least one processing cycle. After filling, the metering sliding door 25 is closed. The determination of fullness can be achieved by setting a timer program (a necessary logical judgment condition in program design) through the control box 41. The control box 41 is a device for managing and protecting the electrical system and is widely used in industrial automation. A programmable logic controller (PLC) is a digital computing and operating electronic system specifically designed for industrial environments. It uses a programmable memory to store and execute instructions for logical operations, sequential control, timing, counting, and arithmetic operations, and controls various mechanical equipment or production processes through digital or analog input and output. The catalyst inside the metering tank 22 is poured onto the surface of the catalyst base plate 11 by opening the feeding gate 26 via the feeding cylinder 24 (similar to the metering cylinder 23 driving the metering sliding door). The timing of pouring depends on the degree of deactivation of the previous batch of catalyst, generally using a temperature tracking method. The principle is: the higher the catalyst activity, the faster the reaction rate, and the more heat is released (or absorbed) per unit time; when deactivated, the reaction rate decreases, and the thermal effect weakens. Multiple temperature sensors are installed on the surface, middle, and bottom of the catalyst base plate 11. These sensors are all ultra-high precision PT100 RTD sensors. When the activity is good, a clear high-temperature area will be observed through the temperature sensors; when deactivation begins, this temperature curve will gradually weaken and flatten; when the temperature distribution of the catalyst base plate 11 becomes very flat, or the outlet temperature drops significantly, it can be determined that the catalyst activity has significantly decreased (a necessary judgment condition in the program design). The above text has already given two important logical judgment conditions when writing PLC programs. Technicians in this field can replicate the technology based on the principles and structure without any creative effort. After the catalyst particles are poured onto the surface of the catalyst base plate 11, the scraper 29 and rake teeth 210, driven by the leveling cylinder 28, can level and spread the accumulated catalyst. The rake teeth 210 are spaced apart; when the bottom end of the rake teeth 210 contacts the catalyst base plate 11 and moves, it can divide the catalyst particles into "ridges." Repeating this process several times will spread the catalyst particles evenly. This is more conducive to the full contact and reaction between the raw materials and the catalyst.

[0020] Example 2 like Figure 1-4As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the slag removal mechanism 3 includes a slag removal cylinder 31, a slag removal door 34, and a waste collection box 35. One end of the slag removal cylinder 31 is fixedly connected to the side of the processing chamber 1 away from the feeding mechanism. The piston rod end of the slag removal cylinder 31 extends into the interior of the processing chamber 1 and is fixedly connected to a push plate 32. A hard brush 33 is fixedly connected to the bottom of the push plate 32. The bottom end of the hard brush 33 is movably connected to the surface of the catalyst bottom plate 11. The top of the slag removal door 34 is rotatably connected to one side of the processing chamber 1. The waste collection box 35 is movably connected to the outside of one side of the processing chamber 1. The control unit 4 includes a control box. 41. One side of the control box 41 is fixedly connected to the other end of the processing chamber 1. The surface of the control box 41 is equipped with a control panel and the internal part uses a programmable logic controller. Four solenoid valves 42 are fixedly installed on the top of the control box 41. The four solenoid valves 42 are connected to and drive the metering cylinder 23, the feeding cylinder 24, the leveling cylinder 28 and the slag removal cylinder 31 respectively through air pipes. A pair of electromagnetic limiters 43 are fixedly installed on the cylinder surface of the metering cylinder 23, the feeding cylinder 24, the leveling cylinder 28 and the slag removal cylinder 31. Each solenoid valve 42 and electromagnetic limiter 43 is connected to the control box 41 by signal. Several through holes are opened on the surface of the catalyst bottom plate 11.

[0021] In this embodiment, when the catalyst is deactivated to a certain extent, the waste material must be removed before feeding. Activating the slag removal cylinder 31 drives the push plate 32 and the hard brush 33 to move in a straight line, pushing the deactivated catalyst through the slag removal door 34 into the waste collection box 35. Simultaneously, the hard brush 33 removes debris from the holes in the catalyst base plate 11 to prevent clogging. The catalyst base plate 11 is made of thin stainless steel, and the hard brush 33 is made of PBT material, both of which have good corrosion resistance. During installation, the hard brush should be tightly in contact with the catalyst base plate 11. When the push plate 32 moves forward, the waste catalyst on the surface of the catalyst base plate 11 is directly pushed away, while the debris in the holes can be bounced away by the brush bristles (the catalyst does not chemically react with the raw material itself; only filtration is required, making processing very simple). Before the feeding mechanism 2 starts working, it should receive a return signal from the electromagnetic limiter 43 of the slag removal cylinder 31 to prevent the push plate 32 from scraping new catalyst particles to the rear or damaging the device when it moves simultaneously with the scraper 29.

[0022] The working principle of the catalytic device used to prepare n-butyl acetate will be explained in detail below.

[0023] like Figure 1-4As shown, when the catalyst is deactivated to a certain extent, the waste must be removed before feeding. Activating the slag removal cylinder 31 drives the push plate 32 and the hard brush 33 in a linear reciprocating motion, pushing the deactivated catalyst through the slag removal door 34 into the waste collection box 35. Simultaneously, the hard brush 33 removes debris from the holes in the catalyst base plate 11 to prevent blockage. After the electromagnetic limit switch 43 of the slag removal cylinder 31 sends a return signal, the feeding mechanism 2 begins operation. The solid catalyst inside the catalyst box 21 needs frequent replenishment. The metering cylinder 23 opens the metering sliding door 25 to fill the metering box 22. The maximum capacity of the metering box 22 should be sufficient for at least one processing cycle. After filling, the metering sliding door 25 is closed. A timer program can be set in the control box 41 to determine if the box is full. The feeding cylinder 24 opens the feeding door 26 to pour the catalyst from the metering box 22 onto the surface of the catalyst base plate 11. After the catalyst particles are poured onto the surface of the catalyst base plate 11, the scraper 29 and rake teeth 210 driven by the scraper cylinder 28 can be scraped and spread out, which is more conducive to the full contact and reaction between the raw materials and the catalyst.

[0024] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A catalytic device for preparing n-butyl acetate, comprising a processing chamber (1), characterized in that: The processing chamber (1) is fixedly connected to a catalyst base plate (11). A feeding mechanism (2) is provided on one side of the processing chamber (1). A slag removal mechanism (3) is provided on the side of the processing chamber (1) away from the feeding mechanism (2). A control unit (4) is provided at one end of the processing chamber (1). The feeding mechanism (2) includes a feeding channel (211) and a leveling cylinder (28). One end of the rod chamber of the leveling cylinder (28) is fixedly connected to the end of the processing chamber (1) away from the control unit (4). One end of the feeding channel (211) is fixedly connected to the side of the processing chamber (1) away from the slag removal mechanism (3). A metering box (22) is fixedly connected to the top of the feeding channel (211). A catalyst box (21) is fixedly connected to the top of the metering box (22). The inner cavity of the catalyst box (21), the metering box (22) and the feeding channel (211) are connected to the interior of the processing chamber (1).

2. The catalytic apparatus for preparing n-butyl acetate according to claim 1, characterized in that: A metering cylinder (23) and a feeding cylinder (24) are fixedly connected to one side of the metering box (22). The piston rods of the metering cylinder (23) and the feeding cylinder (24) extend into the interior of the metering box (22) and are respectively fixedly connected to a metering sliding door (25) and a feeding door (26).

3. The catalytic apparatus for preparing n-butyl acetate according to claim 2, characterized in that: The two sides of the quantitative sliding door (25) are slidably connected to the two sides of the top inside of the quantitative box (22), and the two sides of the feeding door (26) are slidably connected to the two sides of the bottom inside of the quantitative box (22). One end of the quantitative sliding door (25) and the feeding door (26) are fixedly connected to a limit block (27).

4. The catalytic apparatus for preparing n-butyl acetate according to claim 3, characterized in that: The piston rod of the leveling cylinder (28) extends into the interior of the processing chamber (1) and is fixedly connected to a scraper (29). Several rake teeth (210) are fixedly connected to the bottom of the scraper (29), and the bottom ends of the several rake teeth (210) are movably connected to the surface of the catalyst bottom plate (11).

5. The catalytic apparatus for preparing n-butyl acetate according to claim 4, characterized in that: The slag removal mechanism (3) includes a slag removal cylinder (31), a slag removal door (34), and a waste collection box (35). One end of the slag removal cylinder (31) is fixedly connected to the side of the processing chamber (1) away from the feeding mechanism (2). The piston rod end of the slag removal cylinder (31) extends into the interior of the processing chamber (1) and is fixedly connected to a push plate (32). A hard brush (33) is fixedly connected to the bottom of the push plate (32). The bottom end of the hard brush (33) is movably connected to the surface of the catalyst bottom plate (11). The top of the slag removal door (34) is rotatably connected to one side of the processing chamber (1). The waste collection box (35) is movably connected to the outside of one side of the processing chamber (1).

6. The catalytic apparatus for preparing n-butyl acetate according to claim 5, characterized in that: The control unit (4) includes a control box (41), which is fixedly connected to one end of the processing chamber (1). The surface of the control box (41) is provided with a control panel and the internal part is a programmable logic controller. Four solenoid valves (42) are fixedly installed on the top of the control box (41). The four solenoid valves (42) are connected to and drive the metering cylinder (23), the feeding cylinder (24), the leveling cylinder (28), and the slag removal cylinder (31) respectively through air pipes. A pair of electromagnetic limiters (43) are fixedly installed on the cylinder surface of the metering cylinder (23), the feeding cylinder (24), the leveling cylinder (28), and the slag removal cylinder (31). Each solenoid valve (42) and electromagnetic limiter (43) is signal connected to the control box (41).

7. The catalytic apparatus for preparing n-butyl acetate according to claim 1, characterized in that: The catalyst base plate (11) has several through holes on its surface.

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