Falling film absorption tower structure for phosphorus trichloride production

Abstract

The falling film absorption tower structure for phosphorus trichloride production comprises a bottom shell, the upper end and the lower end of the bottom shell are provided with a gas conveying pipeline and a first shell respectively, the top of the first shell is movably connected with a second shell through a sealing bearing, and the top of the second shell is movably connected with a third shell through a sealing bearing; a top shell is fixedly arranged at the top of the third shell, a liquid conveying pipeline penetrates through the top of the top shell, one end of the liquid conveying pipeline extends into the top shell and is used for spraying liquid, all gas passes through the liquid level in the form of underwater bubbles, and the best treatment effect can be achieved while the gas flow rate is increased; in other words, a liquid level with a high height is added on the basis of the first-stage filler, the second-stage filler and the second-stage filler when gas becomes much so as to adapt to special situations and emergency situations, and the emergency treatment effect of the device is improved.

Description

Technical Field

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

[0002] Phosphorus trichloride is a basic chemical raw material, widely used and in high demand. In the production process of phosphorus trichloride, a falling film absorption tower is needed to purify the gas. The flow of gas and liquid in the tower can be countercurrent or cocurrent. Countercurrent operation is usually adopted. The absorbent is added at the top of the tower and flows from top to bottom, contacting with the gas flowing from bottom to top. The liquid that absorbs the absorbent is discharged from the bottom of the tower, and the purified gas is discharged from the top of the tower.

[0003] The traditional falling film absorption tower has a fixed packing area, which means the maximum area after the liquid flows in is fixed. Therefore, the gas absorption and filtration effect is also limited by the maximum area. This means that the gas that needs to be treated cannot exceed a certain point. Once it exceeds a certain point, substandard gas will be discharged. It cannot cope with special and emergency situations. Once the gas transportation increases, a large amount of substandard gas will be discharged, affecting the overall phosphorus trichloride production quality. Summary of the invention

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

[0005] To achieve the above object, the present invention provides the following technical solution: 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 shell one, the top of the shell one is movably connected to the shell two through a sealed bearing, the top of the shell two is movably connected to the shell three through a sealed bearing, the top of the shell three is fixedly provided with a top shell and a liquid delivery pipeline is penetrated through the top of the top shell, and one end of the liquid delivery pipeline extends to the inside of the top shell for spraying liquid; A gear ring is processed on the outer side of the second shell, a central shaft is movably connected to the inside of the gas delivery pipeline through a sealing bearing, and a gas delivery component is arranged at one end of the central shaft extending into the gas delivery pipeline, a pressure sensor is also arranged inside the gas delivery pipeline, and 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; The first shell, the second shell and the third shell are respectively installed with a third-level filler, a second-level filler and a first-level filler, and an accelerating component is arranged at the bottom of the second-level filler; The acceleration component includes an annular electromagnetic sticker rotatably connected to the bottom of the secondary filler, a filter plate 1 is provided at the bottom of the annular electromagnetic sticker 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 electromagnetic sticker, 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.

[0006] Preferably, a blocking block is slidably provided 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.

[0007] 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 provided at an angle so that the rotating secondary filler can increase the water flow resistance by utilizing the inclination angle.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] Preferably, one end of the liquid delivery pipeline extending to the inside of the top shell is fixedly connected to a nozzle, and a plurality of support columns are arranged on the outside of the shell one, the shell two and the shell three.

[0014] The technical effects and advantages of the present invention are as follows: by driving the outer shell 2 and the secondary filler inside the outer shell 2 to rotate, the secondary filler in high-speed rotation will reduce the rate at which the top liquid flows through the secondary filler due to the inclined opening of the inclined hole 1 and the inclined hole 2, so that a certain liquid level is formed on the top of the secondary filler, and at the same time, the rotation of the secondary filler drives the rotation of the blades, so that the rotation of the blades forms a suction to fill the bottom gas into the secondary filler, and the gas is passed through the secondary filler and the liquid surface formed on the top of the secondary filler by external force. During this period, the gas flow rate is increased by the suction of the blades, and then the liquid surface on the top of the secondary filler is used to achieve that all gases pass through the liquid surface in the form of underwater bubbles, so that 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 present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part; Figure 3 The internal structure of the present invention is shown in FIG. Figure 1 ; Figure 4 The internal structure of the present invention is shown in FIG. Figure 2 ; Figure 5 It is an expanded view of the acceleration component of the present invention; Figure 6 This is a schematic diagram of the installation structure of the blocking block of the present invention; Figure 7 It is a schematic diagram of the inclined hole structure of the present invention.

[0016] In the figure: 1. gas delivery pipeline; 2. bottom shell; 3. shell 1; 4. shell 2; 5. shell 3; 6. top shell; 7. liquid delivery pipeline; 8. support column; 9. gear; 10. transmission shaft 2; 11. rotating shaft 1; 12. center shaft; 13. synchronous belt; 14. limit thorn; 15. metal block; 16. electromagnet; 17. double-axis motor; 18. primary packing; 19. guide hole; 20. secondary packing; 201. Inclined hole one; 202, inclined hole two; 21, acceleration component; 2101, annular electromagnetic sticker; 2102, filter plate one; 2103, secondary guide hole; 2104, filter plate two; 2105, blade; 2106, center hole; 2107, main guide hole; 2108, magnet; 22, delivery pipe; 23, spiral blade; 24, clogging block; 25, spring; 26, nozzle; 27, tertiary filler; 28, gear ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides Figure 1-Figure 7 A falling film absorption tower structure for phosphorus trichloride production shown in the figure comprises a bottom shell 2, a gas delivery pipeline 1 and a shell 1 3 are respectively arranged at the upper and lower ends of the bottom shell 2, a shell 2 4 is movably connected to the top of the shell 1 3 through a sealed bearing, a shell 3 5 is movably connected to the top of the shell 2 4 through a sealed bearing, a top shell 6 is fixedly arranged on the top of the shell 3 5, and a liquid delivery pipeline 7 is passed through the top of the top shell 6, and one end of the liquid delivery pipeline 7 extends to the inside of the top shell 6 for spraying liquid; A gear ring 28 is processed on the outer side of the housing 2 4, the 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 inside of the gas delivery pipeline 1, and a pressure sensor is also arranged inside the gas delivery pipeline 1, and a dual 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; The third-level filler 27, the second-level filler 20 and the first-level filler 18 are installed inside the housing 1 3, the housing 2 4 and the housing 3 5 respectively, and the acceleration component 21 is arranged at the bottom of the second-level filler 20; The acceleration component 21 includes an annular electromagnetic sticker 2101 which is rotatably connected to the bottom of the secondary filler 20, a filter plate 2102 is provided at the bottom of the annular electromagnetic sticker 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Specifically, a gas discharge hole is provided on the top of the top shell 6, a liquid discharge circulation hole is provided on one side of the bottom of the bottom shell 2, a liquid delivery pipe 7 extends to one end of the interior of the top shell 6 and is fixedly connected to a nozzle 26, and multiple support columns 8 are provided on the outside of the outer shell 1 3, the outer shell 2 4 and the outer shell 3 5.

[0024] Working principle: When using the present invention, the spiral blade 23 is driven to rotate by starting the dual-axis motor 17, and the rotation of the spiral blade 23 is used to quantitatively transport the gas. When the spiral blade 23 reaches the maximum transport limit, the pressure sensor inside the gas transport pipeline 1 detects that the air pressure is still rising, and then the electromagnet 16 is started to energize and adsorb the metal block 15, so that the original metal block 15 and the transmission shaft 2 10 are movably connected with 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 limiting thorn 14, the transmission shaft 2 10 is driven to rotate, thereby driving the outer shell 2 4 and the secondary filler 20 inside the outer shell 2 4 to rotate, and the secondary filler 20 rotating at high speed will reduce the top liquid flowing through the secondary due to the inclined opening of the inclined hole 1 201 and the inclined hole 2 202. The speed of the filler 20 is such that a certain liquid surface is formed on the top of the secondary filler 20. At the same time, the rotation of the secondary filler 20 drives the rotation of the blades 2105, so that the rotation of the blades 2105 forms a suction of the gas at the bottom to fill the inside of the secondary filler 20. The gas is passed through the secondary filler 20 and the liquid surface formed on the top of the secondary filler 20 by external force. During this period, the gas flow rate is increased by the suction of the blades 2105, and then the liquid surface on the top of the secondary filler 20 is used to achieve that all gases pass through the liquid surface in the form of underwater bubbles, so that when the gas flow rate is increased, the best treatment effect can also be achieved, that is, when the gas becomes more, a liquid surface with a height is added on the basis of the tertiary filler 27, the secondary filler 20 and the primary filler 18 to adapt to special situations and emergency situations, thereby increasing the emergency treatment effect of the present invention; While liquid blockage is formed on the secondary filler 20 to form a liquid surface, the centrifugal force is used to throw off the blockage block 24, so that the blockage of the guide hole 19 is removed, and then the annular electromagnetic sticker 2101 is adjusted from the state current of the adsorbed magnet 2108 to the current in the opposite direction of the electromagnetic, and the main guide hole 2107 is overlapped with the secondary guide hole 2103, so that the guide hole 19, the main guide hole 2107 and the secondary guide hole 2103 form a connection between the top of the secondary filler 20 and the bottom of the secondary filler 20, so that the tertiary filler 27 can be replenished with liquid to ensure the effect of the tertiary filler 27 on the treatment of liquid. During this period, the opening size of the guide hole 19 is used. The smaller opening can ensure both the formation of the liquid surface and the replenishment of the liquid on the tertiary filler 27.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 electromagnetic sticker (2101) rotatably connected to the bottom of the secondary filler (20); a filter plate 1 (2102) is arranged at the bottom of the annular electromagnetic sticker (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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