A falling film absorption tower structure for phosphorus trichloride production

Abstract

The invention discloses a falling film absorption tower structure for phosphorus trichloride production, comprising a bottom shell, wherein the upper and lower ends of the bottom shell are respectively provided with a gas delivery pipeline and a first shell, the top of the first shell is movably connected with a second shell through a sealing bearing, the top of the second shell is movably connected with a third shell through a sealing bearing, a top shell is fixedly provided on the top of the third shell, and a liquid delivery pipeline runs through the top of the top shell, one end of the liquid delivery pipeline extends to the inside of the top shell for spraying liquid, so that all gases pass through the liquid surface in the form of underwater bubbles, and the best treatment effect can be achieved when the gas flow rate is increased, that is, when the gas becomes more, a liquid surface with a height is added on the basis of the primary filler, the secondary filler and the primary filler to adapt to special situations and emergency situations, thereby increasing the emergency treatment effect of the invention.

Description

Technical Field

[0001] The present invention belongs to the field of phosphorus trichloride production equipment, and particularly relates to a falling film absorption tower structure for phosphorus trichloride production. Background Art

[0002] Phosphorus trichloride, as a basic chemical raw material, is widely used and in large demand. In the production process of phosphorus trichloride, a falling film absorption tower is required to purify gases. The flow mode of the gas-liquid two-phase in the tower can be countercurrent or cocurrent. Usually, countercurrent operation is adopted. The absorbent is added from the top of the tower and flows downward, contacting the gas flowing upward from the bottom. The liquid that has absorbed the absorbate is discharged from the bottom of the tower, and the purified gas is discharged from the top of the tower.

[0003] In the traditional falling film absorption tower, due to the fixed size of the packing area, that is, the maximum area after the fixed liquid inflow, the absorption and filtration effect on the gas is also limited by the maximum area. This results in that the gas to be treated cannot exceed a certain amount. Once it exceeds, unqualified gas will be discharged, and it cannot cope with special and emergency situations. Once the gas transportation increases, a large amount of unqualified gas will be discharged, affecting the overall quality of phosphorus trichloride production. Summary of the Invention

[0004] The purpose of the present invention is to provide a falling film absorption tower structure for phosphorus trichloride production to solve the above problems.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A falling film absorption tower structure for phosphorus trichloride production, including a bottom shell. Gas transmission pipelines and an outer shell one are respectively arranged at the upper and lower ends of the bottom shell. The top of the outer shell one is movably connected to an outer shell two through a sealed bearing. The top of the outer shell two is movably connected to an outer shell three through a sealed bearing. A top shell is fixedly arranged at the top of the outer shell three, and a liquid transmission pipeline penetrates through the top of the top shell. One end of the liquid transmission pipeline extends into the interior of the top shell for spraying liquid;

[0006] A gear ring is machined on the outer side of the outer shell two. A central shaft is movably connected to the interior of the gas transmission pipeline through a sealed bearing, and a gas delivery component is arranged at one end of the central shaft extending into the interior of the gas transmission pipeline. A pressure sensor is also arranged in the gas transmission pipeline. A dual-power mechanism is arranged between the central shaft and the gear ring to drive the central shaft and the gear ring to rotate;

[0007] Tertiary packing, secondary packing, and primary packing are respectively installed inside the outer shell one, the outer shell two, and the outer shell three. An acceleration component is arranged at the bottom of the secondary packing;

[0008] The acceleration component includes an annular electromagnet rotatably connected to the bottom of the secondary filler, a filter plate 1 is provided at the bottom of the annular electromagnet and a plurality of main flow holes are provided on the filter plate 1, a magnet is fixedly provided at the top edge of the main flow hole and the magnet corresponds to a plurality of electromagnet heads on the annular electromagnet, a filter plate 2 is movably connected to the bottom of the filter plate 1 and both the filter plate 1 and the filter plate 2 are movably connected to the inner wall of the second shell through bearings, a plurality of secondary flow holes are provided on the outer side of the filter plate 2 and the secondary flow holes correspond one to one to the main flow holes, a blade for filling the bottom gas into the center hole is provided in the middle of the filter plate 2, and the center axis of the blade is fixedly connected to the bottom of the secondary filler and rotates with the rotation of the secondary filler.

[0009] Preferably, a blocking block is slidably arranged inside the guide hole, and a spring is fixedly connected between one side of the blocking block and the inner wall of the secondary filler so that the blocking block is compressed by the centrifugal force of the secondary filler and the spring retracts to remove the blockage of the guide hole.

[0010] Preferably, a plurality of inclined holes 1 and inclined holes 2 are provided inside the secondary filler, and the inclined holes 1 and inclined holes 2 are both inclined so that the rotating secondary filler can increase the water flow resistance by utilizing the inclined angle.

[0011] Preferably, the air delivery assembly includes a spiral blade fixed on a central axis extending to the inside of a gas delivery pipeline, a delivery pipe is provided on the top of the spiral blade, and the delivery pipe is fixedly connected to the inner wall of the bottom shell, and the delivery pipe is used to shield the gas outlet of the gas delivery pipeline to prevent liquid from directly pouring in.

[0012] Preferably, the dual-power mechanism includes a dual-axis motor fixed on the outside of a shell, the output shaft at the bottom of the dual-axis motor is transmission-connected with a rotating shaft, a synchronous belt is provided between the rotating shaft and the central shaft, and the rotating shaft and the rotating shaft move synchronously with each other through the synchronous belt.

[0013] Preferably, an electromagnet is fixedly connected to the output shaft at the top of the dual-axis motor, a metal block is adsorbed on the electromagnet, a second transmission shaft passes through the inside of the metal block, and the second transmission shaft is movably connected to the output shaft at the top of the dual-axis motor via a bearing, a limiting rod is arranged on the outer side of one end of the second transmission shaft extending into the inside of the metal block, and the metal block is limited in the circumferential direction between itself and the second transmission shaft through the limiting rod.

[0014] Preferably, a gear is fixedly connected to the top of the second transmission shaft, and the gear is meshed with a gear ring to drive the second housing to rotate.

[0015] Preferably, a gas discharge hole is provided at the top of the top shell, and a liquid discharge circulation hole is provided at one side of the bottom of the bottom shell.

[0016] Preferably, one end of the liquid delivery pipeline extending into the top shell is fixedly connected with a spray head, and a plurality of support columns are arranged on the outer sides of the first shell, the second shell and the third shell.

[0017] The technical effects and advantages of the present invention: By driving the second shell and the secondary packing inside the second shell to rotate, the secondary packing in high-speed rotation will reduce the flow rate of the liquid at the top passing through the secondary packing due to the inclined openings of the first inclined holes and the second inclined holes, so that a certain liquid level is formed at the top of the secondary packing. At the same time, the rotation of the secondary packing is used to drive the rotation of the blades, so that the rotation of the blades forms suction to fill the gas at the bottom of the blades into the secondary packing. The gas is passed through the liquid level formed by the secondary packing and the top of the secondary packing by using external force. During this period, the suction of the blades is used to increase the gas flow rate, and then the liquid level at the top of the secondary packing is used to make all the gas pass through the liquid level in the form of underwater bubbles. When the gas flow rate is increased, the best treatment effect can be achieved, that is, when the gas increases, a liquid level with a certain height is added on the basis of the primary packing, the secondary packing and the primary packing to adapt to special situations and emergencies, and the emergency treatment effect of the present invention is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is of the present invention Figure 1 partial enlarged view of part A;

[0020] Figure 3 is a schematic internal structure diagram of the present invention Figure 1 ;

[0021] Figure 4 is a schematic internal structure diagram of the present invention Figure 2 ;

[0022] Figure 5 is an unfolded view of the acceleration component of the present invention;

[0023] Figure 6 is a schematic diagram of the installation structure of the blocking block of the present invention;

[0024] Figure 7 is a schematic diagram of the inclined hole structure of the present invention.

[0025] In the figure: 1. Gas delivery pipeline; 2. Bottom shell; 3. Outer shell one; 4. Outer shell two; 5. Outer shell three; 6. Top shell; 7. Liquid delivery pipeline; 8. Support column; 9. Gear; 10. Transmission shaft two; 11. Rotating shaft one; 12. Central shaft; 13. Synchronous belt; 14. Limiting barbs; 15. Metal block; 16. Electromagnet; 17. Biaxial motor; 18. First-stage packing; 19. Diversion hole; 20. Second-stage packing; 201. Inclined hole one; 202. Inclined hole two; 21. Acceleration assembly; 2101. Ring-shaped electromagnet; 2102. Filter plate one; 2103. Secondary diversion hole; 2104. Filter plate two; 2105. Blade; 2106. Central hole; 2107. Main diversion hole; 2108. Magnet; 22. Delivery pipe; 23. Spiral blade; 24. Blocking block; 25. Spring; 26. Sprayer; 27. Third-stage packing; 28. Gear ring. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides a falling film absorption tower structure for phosphorus trichloride production as shown in Figures 1-7 which includes a bottom shell 2. A gas delivery pipeline 1 and an outer shell one 3 are respectively arranged at the upper and lower ends of the bottom shell 2. The top of the outer shell one 3 is movably connected to an outer shell two 4 through a sealed bearing. The top of the outer shell two 4 is movably connected to an outer shell three 5 through a sealed bearing. The top of the outer shell three 5 is fixedly provided with a top shell 6 and the top of the top shell 6 is penetrated by a liquid delivery pipeline 7. One end of the liquid delivery pipeline 7 extends into the top shell 6 for spraying liquid;

[0028] A gear ring 28 is machined on the outer side of the outer shell two 4. A central shaft 12 is movably connected to the inside of the gas delivery pipeline 1 through a sealed bearing and a gas delivery component is arranged at one end of the central shaft 12 extending into the gas delivery pipeline 1. A pressure sensor is also arranged inside the gas delivery pipeline 1. A double-power mechanism is arranged between the central shaft 12 and the gear ring 28 for driving the central shaft 12 and the gear ring 28 to rotate;

[0029] The outer shell one 3, the outer shell two 4 and the outer shell three 5 are respectively internally provided with a third-stage packing 27, a second-stage packing 20 and a first-stage packing 18. An acceleration assembly 21 is arranged at the bottom of the second-stage packing 20;

[0030] The acceleration component 21 includes an annular electromagnet 2101 that is rotatably connected to the bottom of the secondary filler 20, a filter plate 2102 is provided at the bottom of the annular electromagnet 2101, and a plurality of main flow holes 2107 are provided on the filter plate 2102, a magnet 2108 is fixedly provided at the top edge of the main flow hole 2107, and the magnet 2108 corresponds to a plurality of electromagnet heads on the annular electromagnet 2101, a filter plate 2104 is movably connected to the bottom of the filter plate 1 2102, and the filter plate 1 2102 and the filter plate 2 2104 are both movably connected to the inner wall of the shell 2 4 through bearings, a plurality of secondary flow holes 2103 are provided on the outer side of the filter plate 2104, and the secondary flow holes 2103 correspond one-to-one to the main flow holes 2107, a blade 2105 for filling the bottom gas into the center hole 2106 is provided in the middle of the filter plate 2104, and the central axis of the blade 2105 is fixedly connected to the bottom of the secondary filler 20 and rotates with the rotation of the secondary filler 20.

[0031] Specifically, a blocking block 24 is slidably arranged inside the guide hole 19, and a spring 25 is fixedly connected between one side of the blocking block 24 and the inner wall of the secondary filler 20 so that the blocking block 24 is compressed by the centrifugal force of the secondary filler 20 to retract the spring 25 and remove the blockage of the guide hole 19.

[0032] Specifically, a plurality of inclined holes 1 201 and inclined holes 202 are provided inside the secondary filler 20 , and both the inclined holes 1 201 and the inclined holes 202 are provided at an angle to facilitate the rotation of the secondary filler 20 , and the water flow resistance is increased by utilizing the inclination angle.

[0033] Specifically, the air delivery component includes a spiral blade 23 fixed on a central axis 12 extending into the interior of the gas delivery pipeline 1, a delivery pipe 22 is provided on the top of the spiral blade 23, and the delivery pipe 22 is fixedly connected to the inner wall of the bottom shell 2, and the delivery pipe 22 is used to shield the gas outlet of the gas delivery pipeline 1 to prevent liquid from directly pouring in.

[0034] Specifically, the dual-power mechanism includes a dual-axis motor 17 fixed on the outside of the outer shell 3, and the output shaft at the bottom of the dual-axis motor 17 is transmission-connected with a rotating shaft 11, a synchronous belt 13 is sleeved between the rotating shaft 11 and the central shaft 12, and the rotating shaft 11 and the central shaft 12 move synchronously with each other through the synchronous belt 13, an electromagnet 16 is fixedly connected to the output shaft at the top of the dual-axis motor 17, and a metal block 15 is adsorbed on the electromagnet 16, a transmission shaft 2 10 runs through the inside of the metal block 15, and the transmission shaft 2 10 and the output shaft at the top of the dual-axis motor 17 are movably connected through a bearing, a limiting rib 14 is arranged on the outside of one end of the transmission shaft 2 10 extending to the inside of the metal block 15, and the metal block 15 is limited in the circumferential direction between the limiting rib 14 and the transmission shaft 2 10, and a gear 9 is fixedly connected to the top of the transmission shaft 2 10, and the gear 9 is meshed with the gear ring 28 to drive the outer shell 2 4 to rotate.

[0035] Specifically, a gas discharge hole is provided at the top of the top shell 6, a liquid discharge and circulation hole is provided at one side of the bottom of the bottom shell 2, one end of the liquid delivery pipe 7 extending into the interior of the top shell 6 is fixedly connected to a nozzle 26, and a plurality of support columns 8 are provided on the outer sides of the outer shell one 3, the outer shell two 4, and the outer shell three 5.

[0036] Working principle: When using the present invention, the rotation of the spiral blade 23 is driven by the start of the dual-axis motor 17, and the spiral blade 23 is used to quantitatively convey gas. When the spiral blade 23 reaches the maximum conveying limit and the pressure sensor inside the gas conveying pipe 1 detects that the air pressure is still rising, the electromagnet 16 is started to be energized to adsorb the metal block 15, so that the original metal block 15 and the transmission shaft two 10 are movably connected to the output shaft of the dual-axis motor 17. Due to the adsorption and fixation of the electromagnet 16 and the metal block 15 and the limitation of the limiting strip 14, the transmission shaft two 10 is driven to rotate, thereby driving the outer shell two 4 and the secondary packing 20 inside the outer shell two 4 to rotate. The secondary packing 20 during high-speed rotation will reduce the flow rate of the liquid flowing through the top of the secondary packing 20 due to the inclined openings of the inclined hole one 201 and the inclined hole two 202, forming a certain liquid level at the top of the secondary packing 20. At the same time, the rotation of the secondary packing 20 drives the rotation of the blade 2105, so that the rotation of the blade 2105 forms a suction to fill the gas at its bottom into the secondary packing 20. The gas is forced to pass through the secondary packing 20 and the liquid level formed at the top of the secondary packing 20. During this period, the suction of the blade 2105 is used to increase the gas flow rate, and then the liquid level at the top of the secondary packing 20 is used to make all the gas pass through the liquid level in the form of underwater bubbles. When the gas flow rate is increased, the best treatment effect can be achieved, that is, when the gas increases, a liquid level with a certain height is added on the basis of the tertiary packing 27, the secondary packing 20, and the primary packing 18 to adapt to special and emergency situations and enhance the emergency treatment effect of the present invention;

[0037] While a liquid blockage is formed on the secondary packing 20 to form a liquid level, the blockage block 24 is thrown off by centrifugal force, causing the diversion hole 19 to lose its blockage. Then, the current of the annular electromagnet 2101 is adjusted from the state of adsorbing the magnet 2108 to the current in the opposite electromagnetic direction, so that the main diversion hole 2107 coincides with the secondary diversion hole 2103, thereby enabling the diversion hole 19, the main diversion hole 2107, and the secondary diversion hole 2103 to form a connection between the top and the bottom of the secondary packing 20, so as to supplement the liquid for the tertiary packing 27 to ensure the liquid treatment effect of the tertiary packing 27. During this period, the size of the opening of the diversion hole 19 is used. A smaller opening can not only ensure the formation of the liquid level but also ensure the liquid supplement for the tertiary packing 27.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A falling film absorption tower structure for phosphorus trichloride production, comprising a bottom shell (2), wherein the bottom shell (2) is provided with a gas delivery pipeline (1) and a shell 1 (3) at the upper and lower ends thereof, respectively, and characterized in that: The top of the shell one (3) is movably connected to the shell two (4) via a sealed bearing, the top of the shell two (4) is movably connected to the shell three (5) via a sealed bearing, a top shell (6) is fixedly arranged on the top of the shell three (5), and a liquid delivery pipeline (7) runs through the top of the top shell (6), one end of the liquid delivery pipeline (7) extends to the inside of the top shell (6) for spraying liquid; The outer side of the second housing (4) is processed with a gear ring (28); the gas delivery pipeline (1) is movably connected to a central shaft (12) via a sealed bearing; an air delivery assembly is provided at one end of the central shaft (12) extending into the gas delivery pipeline (1); a pressure sensor is also provided inside the gas delivery pipeline (1); a dual power mechanism is provided between the central shaft (12) and the gear ring (28) for driving the central shaft (12) and the gear ring (28) to rotate; The first shell (3), the second shell (4) and the third shell (5) are respectively provided with a third-level filler (27), a second-level filler (20) and a first-level filler (18), and an accelerating component (21) is provided at the bottom of the second-level filler (20); The acceleration component (21) comprises an annular electromagnet (2101) rotatably connected to the bottom of the secondary filler (20); a filter plate 1 (2102) is arranged at the bottom of the annular electromagnet (2101); and a plurality of main flow holes (2107) are provided on the filter plate 1 (2102); a magnet (2108) is fixedly arranged at the top edge of the main flow holes (2107); and the magnet (2108) corresponds to a plurality of electromagnet heads on the annular electromagnet (2101); and a filter plate 2 (2104) is movably connected to the bottom of the filter plate 1 (2102) and The filter plate 1 (2102) and the filter plate 2 (2104) are both movably connected to the inner wall of the outer shell 2 (4) via bearings; a plurality of guide holes (2103) are provided on the outer side of the filter plate 2 (2104); and the guide holes (2103) correspond one to one with the main guide holes (2107); a blade (2105) is provided in the middle of the filter plate 2 (2104) for filling the bottom gas into the center hole (2106); and the center axis of the blade (2105) is fixedly connected to the bottom of the secondary filler (20) and rotates with the rotation of the secondary filler (20).

2. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: It also comprises a guide hole (19), wherein a blocking block (24) is slidably arranged inside the guide hole (19), and a spring (25) is fixedly connected between one side of the blocking block (24) and the inner wall of the secondary filler (20), so that the blocking block (24) is compressed by the centrifugal force of the secondary filler (20) to retract the spring (25) and remove the blockage of the guide hole (19).

3. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: A plurality of inclined holes 1 (201) and inclined holes 2 (202) are provided inside the secondary filler (20), and the inclined holes 1 (201) and inclined holes 2 (202) are both inclinedly provided so that the secondary filler (20) in rotation can increase water flow resistance by utilizing the inclination angle.

4. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: The gas delivery component comprises a spiral blade (23) fixed on a central axis (12) extending into the interior of the gas delivery pipeline (1); a delivery pipe (22) is arranged on the top of the spiral blade (23); and the delivery pipe (22) is fixedly connected to the inner wall of the bottom shell (2); the delivery pipe (22) is used to shield the gas outlet of the gas delivery pipeline (1) to prevent liquid from directly pouring in.

5. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: The dual-power mechanism comprises a dual-axis motor (17) fixed on the outside of the housing (3); the output shaft at the bottom of the dual-axis motor (17) is drivingly connected to the rotating shaft (11); a synchronous belt (13) is sleeved between the rotating shaft (11) and the central shaft (12), and the rotating shaft (11) and the central shaft (12) move synchronously with each other through the synchronous belt (13).

6. A falling film absorption tower structure for phosphorus trichloride production according to claim 5, characterized in that: An electromagnet (16) is fixedly connected to the output shaft at the top of the dual-axis motor (17), a metal block (15) is adsorbed on the electromagnet (16), a transmission shaft 2 (10) runs through the metal block (15), and the transmission shaft 2 (10) and the output shaft at the top of the dual-axis motor (17) are movably connected via a bearing, a limiting rib (14) is arranged on the outer side of one end of the transmission shaft 2 (10) extending into the metal block (15), and the metal block (15) is limited in the circumferential direction with the transmission shaft 2 (10) via the limiting rib (14).

7. A falling film absorption tower structure for phosphorus trichloride production according to claim 6, characterized in that: A gear (9) is fixedly connected to the top of the second transmission shaft (10), and the gear (9) is meshedly connected with the gear ring (28) to drive the second housing (4) to rotate.

8. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: The top of the top shell (6) is provided with a gas discharge hole, and one side of the bottom of the bottom shell (2) is provided with a liquid discharge circulation hole.

9. A falling film absorption tower structure for phosphorus trichloride production according to claim 1, characterized in that: One end of the liquid delivery pipe (7) extending to the interior of the top shell (6) is fixedly connected to a spray head (26), and a plurality of support columns (8) are arranged on the outside of the shell one (3), the shell two (4) and the shell three (5).

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