A quenching absorption tower for acrylic acid production

Abstract

The present invention discloses a quenching absorption tower for acrylic acid production, and relates to the technical field of acrylic acid production; specifically, it comprises a collecting box, one side outer wall of the collecting box is provided with a water tank, and the top outer wall of the collecting box is provided with a connecting tube, a quenching absorption tube and a conical tube in sequence, and the bottom side of the connecting tube is fixedly connected with an air inlet pipe, the top outer wall of the quenching absorption tube is provided with a conical tube, and the top of the conical tube is connected with a purifier, the top of the purifier is provided with a gas phase outlet pipe, a spray mechanism is provided in the quenching absorption tube, and a disturbance mechanism is provided on the top of the spray mechanism. The present invention solves the problem that the contact area between the reaction gas and the water is limited due to the fixed nozzle spraying water in the traditional tank body, improves the efficiency of the heat loss of the reaction gas, ensures the quality of the contact cooling between the reaction gas and the water, and ensures the stability and safety of the reaction gas drainage process.

Description

Technical Field

[0001] The invention relates to the technical field of acrylic acid production, in particular to a quenching absorption tower used for acrylic acid production. Background Art

[0002] In the production process of acrylic acid, the quench absorber (also called the rapid cooling absorber) is an important equipment used to handle the reaction between acrylic acid and water in the gas phase. The main function of the quench absorber is to recover acrylic acid by rapidly cooling the reaction gas. In the gas phase reaction of acrylic acid production, the reaction gas produced contains acrylic acid, water vapor and other by-products. These gases need to be cooled so that acrylic acid can be condensed from the gas phase at a suitable temperature.

[0003] After searching, the Chinese patent application number CN2021109711085 discloses a quenching absorption tower for recycling overhead gas to produce acrylic acid, which involves the technical field of chemical equipment, including a tank body, a liquid inlet pipe, a tower plate, a hydrator, a motor, a transmission component, a rotating drum and a heating tube. The liquid inlet pipe is fixedly connected to one side of the tank body, and several tower plates are fixedly connected to the tank body at intervals along the axis of the tank body. Several hydrators are fixedly connected to the top surface of the highest tower plate at intervals, and two motors are fixedly connected to the bottom of the outer side of the tank body at intervals. The transmission component is rotatably connected to the output end of the motor. The quenching absorption tower for recycling overhead gas to produce acrylic acid in the above patent has the following shortcomings:

[0004] Although the above device can absorb vaporized acrylic acid and separate the intermediate product to make the liquid acrylic acid flowing out of the quenching absorption tower have a higher content, when the reaction gas contacts with water, it only passes through the fixed nozzle inside the top of the tank body, so that the contact area between the reaction gas and water is limited, resulting in a general cooling effect of the reaction gas. Therefore, there is an urgent need for an efficient quenching absorption tower for acrylic acid production. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a quenching absorption tower for acrylic acid production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A quenching absorption tower for acrylic acid production comprises a collecting box, a water tank is arranged on one side outer wall of the collecting box, a connecting tube, a quenching absorption tube and a conical tube are arranged in sequence on the top outer wall of the collecting box, an air inlet pipe is fixedly connected to one side of the bottom of the connecting tube, a conical tube is arranged on the top outer wall of the quenching absorption tube, a purifier is connected to the top of the conical tube, a gas phase outlet pipe is arranged on the top of the purifier, a spray mechanism is arranged in the quenching absorption tube, and a disturbance mechanism is arranged on the top of the spray mechanism.

[0008] Preferably: a water pump is fixed to the top outer wall of the water tank through a support plate, and a water inlet pipe and a guide pipe are respectively provided at the output end and the input end of the water pump, and the end of the water inlet pipe is connected to the top of the water tank through a thread, the guide pipe is connected to one side of the quenching absorption cylinder through a thread, and the end of the guide pipe is connected to one side of the spray mechanism through a thread.

[0009] Furthermore: the disturbance mechanism includes a mounting plate, a motor, a fixed gear plate, a moving gear, an L-shaped guide plate, a rotating rod, a ball hinge, a triangular disturbance rod and an activated carbon net, and the mounting plate is arranged on the top circumferential inner wall of the quenching absorption cylinder.

[0010] Based on the above scheme: the motor is arranged on the top side of the mounting plate, a connecting rod is arranged at the output end of the motor, and a fixed gear plate is arranged on the bottom circumference of one end of the mounting plate, and an L-shaped guide plate is arranged on the circumference of the connecting rod.

[0011] A better solution in the above-mentioned solution is: the rotating rod is rotatably connected to one end of the L-shaped guide plate, and the moving gear is arranged on the top circumferential outer wall of the rotating rod, the fixed gear plate and the moving gear are meshed with each other, and the activated carbon net is arranged on the inner circumference of the rapid cooling absorption cylinder.

[0012] As a further solution of the present invention: the ball hinge is embedded in the activated carbon net through bolts, and the top end of the ball hinge is fixedly connected to the bottom end of the rotating rod, and the triangular disturbance rod is arranged at the bottom end of the ball hinge.

[0013] At the same time, the spray mechanism includes inner ring teeth, linkage teeth, driving teeth, a fixed rod, a rotating shaft, a triangular guide plate and an installation shaft, and the inner ring teeth are arranged on the circumferential inner wall of the rapid cooling absorption cylinder near the bottom of the activated carbon net, the fixed rod is arranged on the bottom end circumference of the connecting rod, the driving teeth are arranged at both ends of the fixed rod, and the installation shaft is arranged at the bottom end of the connecting rod.

[0014] As a preferred embodiment of the present invention: the triangular guide plate is arranged on the bottom end circumference of the mounting shaft, and one end of the guide tube is rotatably connected to the bottom of the triangular guide plate through a bearing, a cavity is left in the triangular guide plate, and the rotating shaft is rotatably connected to the triangular top outer wall of the triangular guide plate.

[0015] At the same time, the triangular bottom outer wall of the triangular guide plate is connected to the top of the sprinkler through a conduit, the linkage teeth are arranged on the circumference of the rotating shaft, the linkage teeth are meshed with the driving teeth, and the linkage teeth are meshed with the inner ring teeth.

[0016] As a more optimal solution of the present invention: a guide hole is opened in the center of the triangular guide plate, and the inner wall of the cavity in the triangular guide plate is fixedly connected with a corrugated inner strip, the triangular inner wall of the triangular guide plate is opened with guide holes, and the inner circumference of each guide hole is fixedly connected with a filter.

[0017] The beneficial effects of the present invention are:

[0018] 1. A rapid cooling absorption tower for acrylic acid production, wherein a starting motor drives the connecting rod to rotate, thereby driving the L-shaped guide plate to rotate, and the rotating L-shaped guide plate drives the moving gear at the top of the rotating rod to move around the circumference of the fixed toothed disc, and the moving gear moving in a circular trajectory drives the rotating rod of its inner ring to rotate, and the rotating rotating rod is supported by a ball hinge to drive the triangular disturbance rod at its bottom to rotate obliquely. During the rising process of the reaction gas, the activated carbon net can adsorb impurities and particulate matter in the gas, thereby promoting the cleanliness of the reaction gas inside, thereby accelerating the diffusion and mixing of the reaction gas, making it more quickly and thoroughly guided upward, avoiding excessively high or low local concentrations of the reaction gas during the rising process, ensuring the stability and safety of the reaction gas guidance process, and improving the quality of the rapid cooling absorption of the reaction gas.

[0019] 2. A rapid cooling absorption tower for acrylic acid production, when the connecting rod is driven to rotate by the motor, the rotating connecting rod drives the driving teeth at its bottom to rotate, and the rotating driving teeth drive the linkage teeth to move in a circular trajectory in the inner ring teeth through the meshing relationship with the linkage teeth, and the circular motion of the linkage teeth drives the sprinkler at its bottom to move in a circular motion, and water is injected into the sprinkler through the cavity in the triangular guide plate, and the sprinkler atomizes the water downward for spraying, thereby solving the problem of limited contact area between the reaction gas and water due to fixed nozzles spraying water in traditional tanks, improving the efficiency of heat loss of the reaction gas, and ensuring the quality of contact cooling between the reaction gas and water.

[0020] 3. A quenching absorption tower for acrylic acid production. When water enters the inner cavity of the triangular guide plate through the guide tube, the corrugated inner strips arranged inside can generate turbulence in the inner cavity, reduce or prevent scaling in the inner cavity, keep the inner cavity unobstructed and clean, and the corrugated inner strips can increase the strength and stability of the inner wall of the inner cavity, reduce vibration and deformation of the inner cavity, and extend the service life of the triangular guide plate. Secondly, the corrugated inner strips can reduce the resistance of the fluid in the inner cavity, reduce the pressure drop of the fluid, and improve the conveying efficiency of the triangular guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the main structural diagram of the whole invention;

[0022] Figure 2 It is a top view of the overall structure of the present invention;

[0023] Figure 3 This is a diagram of the internal structure of the quenching absorption tube in the present invention;

[0024] Figure 4 It is a structural diagram of the disturbance mechanism of the quenching absorption cylinder in the present invention;

[0025] Figure 5 It is a structural diagram of the spray mechanism of the rapid cooling absorption tube in the present invention;

[0026] Figure 6 It is a partial structural diagram of the spray mechanism in the present invention;

[0027] Figure 7 This is a diagram showing the internal structure of the triangular guide plate of the spray mechanism of the present invention.

[0028] In the figure: 1, collecting box; 2, air inlet pipe; 3, connecting tube; 4, quenching absorption tube; 5, conical tube; 6, gas phase outlet pipe; 7, guide tube; 8, water tank; 9, water inlet pipe; 10, water pump; 11, mounting plate; 12, motor; 13, disturbance mechanism; 14, connecting rod; 15, spray mechanism; 16, sprayer; 1301, fixed gear plate; 1302, moving gear; 1303, L-shaped guide plate; 1304, rotating rod; 1305, ball hinge; 1306, triangular disturbance rod; 1307, activated carbon net; 1501, inner ring gear; 1502, linkage gear; 1503, driving gear; 1504, fixed rod; 1505, rotating shaft; 1506, triangular guide plate; 1507, mounting shaft; 15061, filter screen; 15062, corrugated inner strip; 15063, guide hole. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Embodiment 1:

[0031] A quenching absorption tower for acrylic acid production, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, it includes a collecting box 1, a water tank 8 is fixed to one side of the outer wall of the collecting box 1 by bolts, and a connecting tube 3, a quenching absorption tube 4 and a conical tube 5 are sequentially arranged on the top outer wall of the collecting box 1, and an air inlet pipe 2 is fixedly connected to one side of the bottom of the connecting tube 3, a conical tube 5 is fixed to the top outer wall of the quenching absorption tube 4 by bolts, and a purifier is connected to the top of the conical tube 5, and a gas phase outlet pipe 6 is connected to the top of the purifier by threads, a spray mechanism 15 is arranged in the quenching absorption tube 4, and a disturbance mechanism 13 is arranged on the top of the spray mechanism 15;

[0032] A water pump 10 is fixed to the top outer wall of the water tank 8 through a support plate, and the output end and input end of the water pump 10 are respectively connected to the water inlet pipe 9 and the guide pipe 7 through threads, and the end of the water inlet pipe 9 is connected to the top of the water tank 8 through threads, the guide pipe 7 is connected to one side of the quenching absorption cylinder 4 through threads, and the end of the guide pipe 7 is connected to one side of the spray mechanism 15 through threads.

[0033] Start the water pump 10 to pump the water out of the water tank 8 through the water inlet pipe 9, and inject the water into the spray mechanism 15 in the quenching absorption cylinder 4 through the guide pipe 7;

[0034] In order to accelerate the diffusion and mixing of the reaction gases; Figure 3 and Figure 4 As shown, the disturbance mechanism 13 includes a mounting plate 11, a motor 12, a fixed toothed disc 1301, a moving gear 1302, an L-shaped guide plate 1303, a rotating rod 1304, a ball hinge 1305, a triangular disturbance rod 1306 and an activated carbon net 1307, and the mounting plate 11 is fixed to the inner wall of the top circumference of the quenching absorption cylinder 4 by bolts, the motor 12 is fixed to one side of the top of the mounting plate 11 by bolts, the output end of the motor 12 is connected to the connecting rod 14 by threads, and the fixed toothed disc 1301 is connected to the bottom circumference of one end of the mounting plate 11 by threads, and the L-shaped guide plate 1303 is connected to the circumference of the connecting rod 14 by threads;

[0035] The rotating rod 1304 is rotatably connected to one end of the L-shaped guide plate 1303, and the moving gear 1302 is connected to the top circumferential outer wall of the rotating rod 1304 by bolts, the fixed gear plate 1301 and the moving gear 1302 are meshed with each other, the activated carbon net 1307 is connected to the inner circumference of the rapid cooling absorption cylinder 4 by threads, the ball hinge 1305 is embedded in the activated carbon net 1307 by bolts, and the top end of the ball hinge 1305 is fixedly connected to the bottom end of the rotating rod 1304, and the triangular disturbance rod 1306 is connected to the bottom end of the ball hinge 1305 by threads.

[0036] The starting motor 12 drives the connecting rod 14 to rotate, which drives the L-shaped guide plate 1303 to rotate. The rotating L-shaped guide plate 1303 drives the moving gear 1302 at the top of the rotating rod 1304 to move around the circumference of the fixed gear plate 1301, and the moving gear 1302 moving in a circular trajectory drives the rotating rod 1304 on its inner ring to rotate. The rotating rotating rod 1304 is supported by the ball hinge 1305 and drives the triangular disturbance rod 1306 at its bottom to rotate obliquely. During the rising process of the reaction gas, the activated carbon net 1307 can adsorb impurities and particulate matter in the gas, thereby promoting the cleanliness of the reaction gas inside. Thereby, the diffusion and mixing of the reaction gas is accelerated, making it more quickly and thoroughly guided upward, avoiding excessively high or low local concentrations of the reaction gas during the rising process, ensuring the stability and safety of the reaction gas guidance process, and improving the quality of the rapid cooling absorption of the reaction gas.

[0037] In order to expand the contact area between the reaction gas and water and improve the cooling efficiency of the reaction gas; Figure 3 , Figure 5 and Figure 6 As shown, the spray mechanism 15 includes an inner ring gear 1501, a linkage gear 1502, a driving gear 1503, a fixed rod 1504, a rotating shaft 1505, a triangular guide plate 1506 and a mounting shaft 1507, and the inner ring gear 1501 is connected to the circumferential inner wall of the quenching absorption cylinder 4 near the bottom of the activated carbon net 1307 by a thread, the fixed rod 1504 is connected to the bottom circumference of the connecting rod 14 by a thread, the driving gear 1503 is fixed to both ends of the fixed rod 1504 by bolts, and the mounting shaft 1507 is connected to the bottom end of the connecting rod 14 by a thread;

[0038] The triangular guide plate 1506 is connected to the bottom circumference of the mounting shaft 1507 by means of threads, and one end of the guide tube 7 is rotatably connected to the bottom of the triangular guide plate 1506 by means of a bearing, a cavity is left in the triangular guide plate 1506, the rotating shaft 1505 is rotatably connected to the triangular top outer wall of the triangular guide plate 1506, the triangular bottom outer wall of the triangular guide plate 1506 is connected to the top of the sprinkler 16 by means of a conduit, the linkage gear 1502 is connected to the circumference of the rotating shaft 1505 by means of threads, the linkage gear 1502 is meshed with the driving gear 1503, and the linkage gear 1502 is meshed with the inner ring gear 1501; the model of the sprinkler 16 is MC180.

[0039] When the connecting rod 14 is driven to rotate by the motor 12, the rotating connecting rod 14 drives the driving tooth 1503 at its bottom end to rotate. The rotating driving tooth 1503 drives the linkage tooth 1502 to move in a circular trajectory in the inner ring tooth 1501 through the meshing relationship with the linkage tooth 1502. The circularly moving linkage tooth 1502 drives the sprinkler 16 at its bottom to move in a circular motion. Water is injected into the sprinkler 16 through the cavity in the triangular guide plate 1506. The sprinkler 16 atomizes the water and sprays it downward, which promotes contact cooling between water and reaction gas. As a result, the problem of limited contact area between reaction gas and water due to fixed nozzle water spraying in traditional tank body is solved, the efficiency of heat dissipation of reaction gas is improved, and the quality of contact cooling between reaction gas and water is ensured.

[0040] Working principle: The reaction gas is introduced into the overall device through the air intake pipe 2, and enters the quenching absorption cylinder 4 through the connecting cylinder 3. At this time, the starting motor 12 drives the connecting rod 14 to rotate and drives the L-shaped guide plate 1303 to rotate. The rotating L-shaped guide plate 1303 drives the moving gear 1302 at the top of the rotating rod 1304 to move around the circumference of the fixed toothed disc 1301, and the moving gear 1302 moving in a circular trajectory drives the rotating rod 1304 on its inner ring to rotate. The rotating rotating rod 1304 is supported by the ball hinge 1305 and drives the triangular disturbance rod 1306 at the bottom to rotate obliquely. During the rising process of the reaction gas, the activated carbon net 1307 can adsorb impurities and particulate matter in the gas, which promotes the cleanliness of the reaction gas. As a result, the diffusion and mixing of the reaction gas are accelerated, making it more quickly and thoroughly guided upward.

[0041] When the connecting rod 14 is driven to rotate by the motor 12, the rotating connecting rod 14 drives the driving tooth 1503 at its bottom end to rotate. The rotating driving tooth 1503 drives the linkage tooth 1502 to move in a circular trajectory in the inner ring tooth 1501 through the meshing relationship with the linkage tooth 1502. The circularly moving linkage tooth 1502 drives the sprinkler 16 at its bottom to move in a circular motion, and water is injected into the sprinkler 16 through the cavity in the triangular guide plate 1506, and the sprinkler 16 atomizes the water for spraying downward.

[0042] Embodiment 2:

[0043] A quenching absorption tower for acrylic acid production, such as Figure 7 As shown, in order to improve the conveying efficiency of the triangular guide plate 1506, this embodiment makes the following improvements on the basis of embodiment 1: a guide hole 15063 is opened in the center of the triangular guide plate 1506, and the inner wall of the cavity in the triangular guide plate 1506 is fixedly connected with a corrugated inner strip 15062, and the triangular inner wall of the triangular guide plate 1506 is opened with guide holes, and the inner circumference of each guide hole is fixedly connected with a filter 15061.

[0044] When water enters the inner cavity of the triangular guide plate 1506 through the guide tube 7, the corrugated inner strips 15062 arranged inside can generate turbulence in the inner cavity, reduce or prevent scaling in the inner cavity, keep the inner cavity unobstructed and clean, and the corrugated inner strips 15062 can increase the strength and stability of the inner wall of the inner cavity, reduce the vibration and deformation of the inner cavity, and extend the service life of the triangular guide plate 1506. Secondly, the corrugated inner strips 15062 can reduce the resistance of the fluid in the inner cavity, reduce the pressure drop of the fluid, and improve the conveying efficiency of the triangular guide plate 1506.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quenching absorption tower for acrylic acid production, comprising a collecting box (1), characterized in that: A water tank (8) is provided on one side outer wall of the collecting box (1), and a connecting cylinder (3), a quenching absorption cylinder (4) and a conical cylinder (5) are provided on the top outer wall of the collecting box (1) in sequence, and an air inlet pipe (2) is fixedly connected to one side of the bottom of the connecting cylinder (3), a conical cylinder (5) is provided on the top outer wall of the quenching absorption cylinder (4), and a purifier is connected to the top of the conical cylinder (5), and a gas phase outlet pipe (6) is provided on the top of the purifier, a spray mechanism (15) is provided in the quenching absorption cylinder (4), and a disturbance mechanism (13) is provided on the top of the spray mechanism (15); The disturbance mechanism (13) comprises a mounting plate (11), a motor (12), a fixed toothed disc (1301), a moving gear (1302), an L-shaped guide plate (1303), a rotating rod (1304), a ball hinge (1305), a triangular disturbance rod (1306) and an activated carbon net (1307), wherein the mounting plate (11) is arranged on the inner wall of the top circumference of the quenching absorption cylinder (4), the motor (12) is arranged on one side of the top of the mounting plate (11), a connecting rod (14) is arranged at the output end of the motor (12), the fixed toothed disc (1301) is arranged on the bottom circumference of one end of the mounting plate (11), and the L-shaped guide plate (1303) is arranged on the inner wall of the top circumference of the quenching absorption cylinder (4). 03) is arranged on the circumference of the connecting rod (14), the rotating rod (1304) is rotatably connected to one end of the L-shaped guide plate (1303), and the moving gear (1302) is arranged on the top circumferential outer wall of the rotating rod (1304), the fixed gear plate (1301) and the moving gear (1302) are meshed with each other, the activated carbon net (1307) is arranged on the inner circumference of the rapid cooling absorption cylinder (4), the ball hinge (1305) is embedded in the activated carbon net (1307) by bolts, and the top end of the ball hinge (1305) is fixedly connected to the bottom end of the rotating rod (1304), and the triangular disturbance rod (1306) is arranged at the bottom end of the ball hinge (1305).

2. The quenching absorption tower for acrylic acid production according to claim 1, characterized in that: A water pump (10) is fixed to the top outer wall of the water tank (8) via a support plate, and an output end and an input end of the water pump (10) are respectively provided with a water inlet pipe (9) and a guide pipe (7), and the end of the water inlet pipe (9) is connected to the top of the water tank (8) via a thread, the guide pipe (7) is connected to one side of the quenching absorption cylinder (4) via a thread, and the end of the guide pipe (7) is connected to one side of the spray mechanism (15) via a thread.

3. The quenching absorption tower for acrylic acid production according to claim 1, characterized in that: The spray mechanism (15) comprises an inner ring gear (1501), linkage gears (1502), drive gears (1503), a fixed rod (1504), a rotating shaft (1505), a triangular guide plate (1506) and a mounting shaft (1507), wherein the inner ring gear (1501) is arranged on the circumferential inner wall of the quenching absorption cylinder (4) below the activated carbon net (1307), the fixed rod (1504) is arranged on the bottom circumference of the connecting rod (14), the drive gears (1503) are arranged at both ends of the fixed rod (1504), and the mounting shaft (1507) is arranged at the bottom end of the connecting rod (14).

4. A quenching absorption tower for acrylic acid production according to claim 3, characterized in that: The triangular guide plate (1506) is arranged on the bottom circumference of the installation shaft (1507), and one end of the guide tube (7) is rotatably connected to the bottom of the triangular guide plate (1506) through a bearing. A cavity is left in the triangular guide plate (1506), and the rotating shaft (1505) is rotatably connected to the outer wall of the triangular top of the triangular guide plate (1506).

5. The quenching absorption tower for acrylic acid production according to claim 3, characterized in that: The triangular bottom outer wall of the triangular guide plate (1506) is connected to the top of the sprinkler (16) via a conduit, the linkage teeth (1502) are arranged on the circumference of the rotating shaft (1505), the linkage teeth (1502) and the driving teeth (1503) are meshed with each other, and the linkage teeth (1502) and the inner ring teeth (1501) are meshed with each other.

6. A quenching absorption tower for acrylic acid production according to claim 5, characterized in that: A guide hole (15063) is provided at the center of the triangular guide plate (1506), and a corrugated inner strip (15062) is fixedly connected to the inner wall of the cavity in the triangular guide plate (1506). A guide hole is provided on the triangular inner wall of the triangular guide plate (1506), and a filter screen (15061) is fixedly connected to the inner circumference of each guide hole.

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