A liquid inlet device and usage method for a falling film absorption tower in chemical production

Abstract

The present invention discloses a liquid inlet device and a usage method for a falling film absorption tower in chemical production, which relates to the field of liquid inlet devices for falling film absorption towers, and solves the problem that liquid caustic soda will crystallize at a relatively low temperature and easily block the nozzle. The device includes a liquid storage tank, a connecting pipe, a connecting part, a falling film absorption tower main body, and an air outlet pipe; through the mutual cooperation of a buffer assembly and a rotating assembly, the flow rate of the liquid caustic soda can be slowed down by the rotation of the first rotating plate, and then the crystallized caustic soda can be quickly melted in the water flow through the cooperation of the auxiliary block, avoiding the phenomenon that liquid caustic soda crystallizes at a relatively low temperature. The lower the temperature, the more serious the crystallization. Due to seasonal or weather changes, when the temperature near the falling film absorption tower main body becomes lower, a part of the liquid caustic soda will crystallize. When the liquid caustic soda flows, it will drive a part of the crystallized caustic soda to flow, which easily blocks the nozzle, resulting in a lower treatment efficiency for harmful gases. The treatment efficiency of harmful gases is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid inlet devices for falling film absorption towers, and specifically to a liquid inlet device for a falling film absorption tower used in chemical production and its usage method. Background Technique

[0002] An absorption tower is a device for realizing absorption operations; it is divided into three categories according to the gas-liquid phase contact form: the first category is plate towers, bubble absorption towers, and stirred bubble absorption towers in which gas is dispersed in the liquid phase in the form of bubbles; the second category is ejectors, venturi tubes, and spray towers in which liquid is dispersed in the gas phase in the form of liquid droplets; the third category is packed absorption towers and falling film absorption towers in which liquid moves in a film shape to contact the gas phase; the flow mode of the gas-liquid two-phase in the tower can be countercurrent or cocurrent, and 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. There are many methods for treating harmful gases, and recycling harmful gases using a falling film absorption tower is an important aspect among them.

[0003] The falling film absorption tower uses the absorption and neutralization effect of liquid caustic soda to treat harmful gases. Industrial products contain many impurities, mainly sodium chloride and sodium carbonate, and sometimes a small amount of iron oxide. When dissolved into concentrated liquid caustic soda, most of the impurities will float on the liquid surface and can be separated. The structure of the falling film absorption tower includes a tower body, falling film absorption tubes, a support plate, a liquid phase initial distribution device, a gas phase outlet collector, and a gas phase initial distribution filler; its characteristic is that the falling film absorption tubes are placed in the absorption tower, fixed by the support plate, with the upper end being the liquid phase inlet and gas phase outlet, and the lower end being the liquid phase outlet and gas phase inlet. The liquid phase inlet is equipped with a distributor and an initial distribution filler; an initial distribution filler is installed at the gas phase inlet, and a gas phase collector with a fractal structure and gradually increasing levels is installed at the gas phase outlet.

[0004] Since liquid caustic soda will crystallize at lower temperatures, and the lower the temperature, the more serious the crystallization. Due to seasonal or weather changes, when the temperature near the main body of the falling film absorption tower becomes lower, it will cause a part of the liquid caustic soda to crystallize. When the liquid caustic soda flows, it will drive a part of the crystallized caustic soda to flow, which is likely to block the nozzle, resulting in the problem of reduced treatment efficiency for harmful gases. Summary of the Invention

[0005] The purpose of the present invention is to provide a liquid inlet device for a falling film absorption tower used in chemical production and its usage method, which can solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A liquid inlet device for a falling film absorption tower used in chemical production and its usage method, including a liquid storage tank, a connecting pipe, a connecting part, a falling film absorption tower main body, and an air outlet pipe;

[0007] The liquid storage tank is used to store liquid caustic soda,

[0008] The connecting pipe is a pipe for connecting the liquid storage tank and the main body of the falling film absorption tower;

[0009] The gas outlet pipe is used to discharge the treated gas;

[0010] One side of the liquid storage tank is fixedly connected with a connecting pipe. The outer wall of the connecting pipe is fixedly connected with a connecting part. The end of the connecting pipe far away from the liquid storage tank is fixedly connected with the main body of the falling film absorption tower. There are multiple main bodies of the falling film absorption tower. The top of one of the main bodies of the falling film absorption tower is fixedly connected with a gas outlet pipe. A buffer assembly is arranged inside the connecting part;

[0011] Among them, the buffer assembly includes a first rotating plate arranged inside the connecting part. A rotating assembly is arranged on the side wall of the first rotating plate. The inner wall of the first rotating plate is fixedly connected with a first connecting rod. A moving assembly is arranged inside the first connecting rod. One end of the first connecting rod is embedded in the inner wall of the connecting part and is rotatably connected. The other end of the first connecting rod passes through the inner wall of the connecting part and extends to one side of the connecting part. A motor is arranged on one side of the connecting part. The motor is fixedly installed at one end of the first connecting rod. A filter screen is arranged on one side of the first rotating plate. The filter screen is fixedly installed on the inner wall of the connecting pipe. A cleaning assembly is arranged on one side of the filter screen, avoiding the phenomenon that liquid caustic soda crystallizes when the temperature is relatively low. The lower the temperature, the more serious the crystallization. Due to seasonal or weather changes, when the temperature near the main body of the falling film absorption tower becomes lower, it will cause a part of the liquid caustic soda to crystallize. When the liquid caustic soda flows, it will drive a part of the crystallized alkali to flow, which is easy to block the nozzle, thus resulting in the problem of low treatment efficiency of harmful gases and ensuring the treatment efficiency of harmful gases.

[0012] Preferably, the first rotating plates are evenly installed on the outer wall of the first connecting rod in a circumferential array. The first rotating plates are slidably connected with the connecting part. The diameter of the first rotating plate is the same as the diameter of the connecting part, preventing the liquid caustic soda from flowing into the nozzle together with the crystallized alkali and blocking the nozzle, affecting the treatment of harmful gases.

[0013] Preferably, the rotating assembly includes a second connecting rod arranged on the side wall of the first rotating plate. The second connecting rods are evenly installed on one side of the first rotating plate. One end of each second connecting rod is embedded in the side wall of the first rotating plate and is rotatably connected. Auxiliary blocks are evenly distributed on the outer wall of each second connecting rod, so that the auxiliary blocks stir the nearby liquid caustic soda to accelerate the dissolution of the liquid caustic soda crystallization.

[0014] Preferably, the moving component includes a third connecting rod disposed inside the first connecting rod. Both ends of the third connecting rod are embedded in the inner wall of the connecting portion and fixedly connected. The outer wall of the third connecting rod is uniformly provided with bumps and fixedly connected. One end of each bump away from the third connecting rod is provided with a first connecting plate. The top of each first connecting plate is fixedly installed with a second connecting plate. A return component is provided at the top of each second connecting plate. Each second connecting plate is embedded in the inner wall of the first rotating plate and slidably connected. A gear is meshed on one side of each first connecting plate. The gear is fixedly installed at one end of the second connecting rod. By providing the moving component, the first connecting plate can move up and down during the rotation of the first rotating plate with the cooperation of the return component, driving the second connecting rod to rotate, and enabling the auxiliary block to stir the nearby liquid caustic soda, thereby improving the melting speed of the crystal caustic soda.

[0015] Preferably, the return component includes a spring disposed at the top of the second connecting plate. A fixing plate is provided at the top of the spring. The two ends of the spring are respectively fixedly connected to the second connecting plate and the fixing plate, causing the first connecting plate to move towards the bump, facilitating the next contact with the bump and improving the stability of the device.

[0016] Preferably, the top of the bump and the top of the first connecting plate are both provided as inclined surfaces. The bump and the first connecting plate are slidably connected. During the movement of the first connecting plate, it contacts the bump and moves upward, providing power for the moving component.

[0017] Preferably, the cleaning component includes a cleaning plate disposed on one side of the filter screen. The cleaning plates are uniformly installed on the outer wall of the fourth connecting rod in a circumferential array. The fourth connecting rod is disposed on one side of the first rotating plate. A connecting component is provided between the fourth connecting rod and the first rotating plate. A brush is fixedly installed on one side of each cleaning plate close to the filter screen. The rotation of the cleaning plate can cause the brush to contact the filter screen, and during the rotation, the brush is embedded in the holes opened in the filter screen to clean the filter screen, preventing some un-melted alkali from entering the interior of the filter screen and jamming the filter screen.

[0018] Preferably, the brushes are uniformly distributed on one side of the cleaning plate. One end of the brush is provided as an arc, preventing some incompletely melted alkali from getting stuck in the filter screen, affecting the flow of the liquid caustic soda, and thus affecting the treatment effect of the toxic gas, and improving the stability of the device treatment.

[0019] Preferably, the connection component includes a first bevel gear disposed between the fourth connecting rod and the first rotating plate. One end of the fourth connecting rod away from the cleaning plate is fixedly installed with the first bevel gear. A second bevel gear is meshed on one side of the first bevel gear. Both the first bevel gear and the second bevel gear are installed inside the protective sleeve. The second bevel gear is fixedly installed at one end of the fifth connecting rod. One end of the fifth connecting rod is fixedly connected to the second rotating plate. During the rotation of the buffer component, the first rotating plate can contact the second rotating plate to drive the second rotating plate to rotate, thereby driving the cleaning component to rotate, so that the buffer component provides power for the cleaning component.

[0020] A method for feeding liquid into a falling film absorption tower for chemical production:

[0021] S1: Start the device and the motor;

[0022] S2: Liquid caustic soda flows from the inside of the liquid storage tank into the inside of the connecting pipe. The first rotating plate rotates and contacts the liquid caustic soda. At the same time, the rotation of the first rotating plate drives the rotation of the second connecting rod, so that the auxiliary block rotates to stir the liquid caustic soda;

[0023] S3: When the first rotating plate rotates and contacts the second rotating plate, the rotation of the first rotating plate drives the rotation of the second rotating plate, thereby driving the rotation of the cleaning plate. The rotation of the cleaning plate drives the brush bristles to clean the inner wall of the filter screen;

[0024] S4: Liquid caustic soda is sprayed out from the nozzle to contact the harmful gas for treatment, and the treated gas is discharged from the air outlet pipe.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. Through the mutual cooperation of the buffer component and the rotating component, the present invention can slow down the flow rate of liquid caustic soda through the rotation of the first rotating plate, and then through the cooperation of the auxiliary block, the crystallized alkali can be quickly melted in the water flow, avoiding the phenomenon that liquid caustic soda will crystallize when the temperature is relatively low. The lower the temperature, the more serious the crystallization. Due to seasonal or weather changes, when the temperature near the main body of the falling film absorption tower becomes lower, it will cause a part of the liquid caustic soda to crystallize. When the liquid caustic soda flows, it will drive a part of the crystallized alkali to flow, which is easy to block the nozzle, resulting in the problem of low treatment efficiency for harmful gases, and ensuring the treatment efficiency of harmful gases.

[0027] 2. Through the arranged moving component, the present invention can, with the cooperation of the restoring component, move the first connecting plate up and down during the rotation of the first rotating plate, drive the second connecting rod to rotate, and make the auxiliary block stir the nearby liquid caustic soda, improving the melting speed of the crystallized alkali. Description of the Drawings

[0028] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the connecting portion structure of the present invention;

[0031] Figure 4 This is a structural diagram of the buffer assembly of the present invention;

[0032] Figure 5 This is a schematic diagram of the internal structure of the buffer assembly of the present invention;

[0033] Figure 6 This is a schematic structural diagram of the cleaning component of the present invention;

[0034] Figure 7 This is a structural diagram of the mobile component of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the connection component of the present invention.

[0036] In the figure: 1. liquid storage tank; 2. connecting pipe; 3. connecting part; 4. falling film absorption tower body; 5. outlet pipe; 6. first rotating plate; 7. first connecting rod; 8. motor; 9. filter; 10. second connecting rod; 11. auxiliary block; 12. third connecting rod; 13. bump; 14. first connecting plate; 15. second connecting plate; 16. gear; 17. spring; 18. fixing plate; 19. cleaning plate; 20. fourth connecting rod; 21. bristles; 22. first bevel gear; 23. second bevel gear; 24. fifth connecting rod; 25. second rotating plate; 26. protective cover. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1-8 , the figure shows a liquid inlet device for a falling film absorption tower for chemical production and a method of use thereof, comprising a liquid storage tank 1, a connecting pipe 2, a connecting portion 3, a falling film absorption tower body 4 and an outlet pipe 5;

[0040] Liquid storage tank 1, used to store liquid alkali,

[0041] Connecting pipe 2, a pipe for connecting the liquid storage tank 1 and the main body 4 of the falling film absorption tower;

[0042] Outlet gas pipe 5, used to discharge the treated gas;

[0043] One side of the liquid storage tank 1 is fixedly connected with a connecting pipe 2, the outer wall of the connecting pipe 2 is fixedly connected with a connecting part 3, one end of the connecting pipe 2 far from the liquid storage tank 1 is fixedly connected with the main body 4 of the falling film absorption tower, there are multiple main bodies 4 of the falling film absorption tower, the top of one of the main bodies 4 of the falling film absorption tower is fixedly connected with an outlet gas pipe 5, and a buffer assembly is arranged inside the connecting part 3;

[0044] Among them, the buffer assembly includes a first rotating plate 6 arranged inside the connecting part 3, a rotating assembly is arranged on the side wall of the first rotating plate 6, a first connecting rod 7 is fixedly connected to the inner wall of the first rotating plate 6, a moving assembly is arranged inside the first connecting rod 7, one end of the first connecting rod 7 is embedded in the inner wall of the connecting part 3 and is rotationally connected, the other end of the first connecting rod 7 passes through the inner wall of the connecting part 3 and extends to one side of the connecting part 3, a motor 8 is arranged on one side of the connecting part 3, the input end of the motor 8 is electrically connected to an external power supply through a wire, the output end of the motor 8 is connected to the first connecting rod 7, the motor 8 is fixedly installed at one end of the first connecting rod 7, a filter screen 9 is arranged on one side of the first rotating plate 6, the holes opened in the inner wall of the filter screen 9 are smaller than the nozzle holes, the filter screen 9 is fixedly installed on the inner wall of the connecting pipe 2, a cleaning assembly is arranged on one side of the filter screen 9. Through the mutual cooperation of the buffer assembly and the rotating assembly, the flow rate of the liquid caustic soda can be slowed down by the rotation of the first rotating plate 6, and then through the cooperation of the auxiliary block 11, the crystallized alkali can be quickly melted in the water flow, avoiding the phenomenon that the liquid caustic soda crystallizes when the temperature is relatively low. The lower the temperature, the more serious the crystallization. Due to seasonal or weather changes, when the temperature near the main body 4 of the falling film absorption tower becomes lower, it will cause a part of the liquid caustic soda to crystallize. When the liquid caustic soda flows, it will drive a part of the crystallized alkali to flow, which is easy to block the nozzle, resulting in the problem of reduced treatment efficiency of harmful gases, and ensuring the treatment efficiency of harmful gases.

[0045] The first rotating plates 6 are evenly installed on the outer wall of the first connecting rod 7 in a circumferential array, the first rotating plates 6 are slidably connected with the connecting part 3, and the diameter of the first rotating plates 6 is the same as the diameter of the connecting part 3. By making the diameter of the first rotating plates 6 the same as the diameter of the connecting part 3, the first rotating plates 6 can block the pipes connecting the two sides of the connecting part 3 and the connecting pipe 2, block the liquid, and prevent the liquid caustic soda from flowing into the nozzle together with the crystallized alkali and blocking the nozzle, affecting the treatment of harmful gases.

[0046] The rotating assembly includes a second connecting rod 10 arranged on the side wall of the first rotating plate 6. The second connecting rods 10 are evenly installed on one side of the first rotating plate 6. One end of each second connecting rod 10 is embedded in the side wall of the first rotating plate 6 and is rotationally connected. Auxiliary blocks 11 are evenly distributed on the outer wall of each second connecting rod 10. By means of the arranged rotating assembly, during the rotation of the first rotating plate 6, it can cooperate with the moving assembly to make the second connecting rod 10 rotate. The rotation of the second connecting rod 10 drives the rotation of the auxiliary blocks 11, so that the auxiliary blocks 11 stir the nearby liquid caustic soda to accelerate the dissolution of the liquid caustic soda crystals.

[0047] The moving assembly includes a third connecting rod 12 arranged inside the first connecting rod 7. Both ends of the third connecting rod 12 are embedded in the inner wall of the connecting part 3 and are fixedly connected. Protrusions 13 are evenly arranged on the outer wall of the third connecting rod 12 and are fixedly connected. A first connecting plate 14 is arranged at one end of each protrusion 13 away from the third connecting rod 12. A second connecting plate 15 is fixedly installed at the top of each first connecting plate 14. A restoring assembly is arranged at the top of each second connecting plate 15. Each second connecting plate 15 is embedded in the inner wall of the first rotating plate 6 and is slidably connected. A gear 16 is meshed on one side of each first connecting plate 14. The gear 16 is fixedly installed at one end of the second connecting rod 10. By means of the arranged moving assembly, under the cooperation of the restoring assembly, the first connecting plate 14 can move up and down during the rotation of the first rotating plate 6, driving the second connecting rod 10 to rotate, so that the auxiliary blocks 11 stir the nearby liquid caustic soda, improving the melting speed of the crystalline caustic soda.

[0048] The restoring assembly includes a spring 17 arranged at the top of the second connecting plate 15. A fixing plate 18 is arranged at the top of the spring 17. Both ends of the spring 17 are fixedly connected to the second connecting plate 15 and the fixing plate 18 respectively. By means of the arranged restoring assembly, when the first connecting plate 14 is not in contact with the protrusion 13, under the action of the spring 17, it can squeeze the second connecting plate 15 to slide in the inner wall of the first rotating plate 6, making the first connecting plate 14 move towards the protrusion 13, facilitating the next contact with the protrusion 13 and improving the stability of the device.

[0049] The top of the protrusion 13 and the top of the first connecting plate 14 are both set as inclined surfaces. The protrusion 13 and the first connecting plate 14 are slidably connected. By setting the top of the protrusion 13 and the top of the first connecting plate 14 as inclined surfaces, when the first connecting plate 14 moves and contacts the protrusion 13, it moves upward, providing power for the moving assembly.

[0050] A method for feeding liquid into a falling film absorber in chemical production:

[0051] S1: Start the device and the motor 8;

[0052] S2: The liquid caustic soda flows from the inside of the liquid storage tank 1 to the inside of the connecting pipe 2. The first rotating plate 6 rotates and contacts the liquid caustic soda. At the same time, the rotation of the first rotating plate 6 drives the rotation of the second connecting rod 10, so that the auxiliary block 11 rotates to stir the liquid caustic soda;

[0053] S3: When the first rotating plate 6 rotates and contacts the second rotating plate 25, the rotation of the first rotating plate 6 drives the rotation of the second rotating plate 25, thereby driving the rotation of the cleaning plate 19. The rotation of the cleaning plate 19 drives the brush hairs 21 to clean the inner wall of the filter screen 9;

[0054] S4: The liquid caustic soda is sprayed out from the nozzle and contacts the harmful gas for treatment. The treated gas is discharged from the air outlet pipe 5.

[0055] Embodiment 2

[0056] Please refer to Figure 6 , this embodiment further illustrates Embodiment 1. In the figure, the cleaning assembly includes a cleaning plate 19 arranged on one side of the filter screen 9. The cleaning plates 19 are evenly installed on the outer wall of the fourth connecting rod 20 in a circumferential array. The fourth connecting rod 20 is arranged on one side of the first rotating plate 6. A connecting assembly is arranged between the fourth connecting rod 20 and the first rotating plate 6. A brush hair 21 is fixedly installed on one side of each cleaning plate 19 close to the filter screen 9. Through the arranged cleaning assembly, the brush hair 21 can contact the filter screen 9 by the rotation of the cleaning plate 19, and the brush hair 21 can be embedded in the holes opened in the filter screen 9 during the rotation process to clean the filter screen 9, preventing some unmelted alkali from entering the inside of the filter screen 9 and jamming the filter screen 9.

[0057] The brush hairs 21 are evenly distributed on one side of the cleaning plate 19. One end of the brush hair 21 is set to be arc-shaped. By setting one end of the brush hair 21 to be arc-shaped and made of an elastic material, the brush hair 21 can be embedded in the water passing holes opened on the inner wall of the filter screen 9 during the rotation of the cleaning plate 19, preventing some incompletely melted alkali from getting stuck in the filter screen 9, affecting the flow of the liquid caustic soda, and thus affecting the treatment effect of the toxic gas, and improving the stability of the device treatment.

[0058] Embodiment 3

[0059] Please refer to Figure 8, this embodiment further elaborates on other embodiments. In the illustration, the connecting component includes a first bevel gear 22 disposed between the fourth connecting rod 20 and the first rotating plate 6. One end of the fourth connecting rod 20 away from the cleaning plate 19 is fixedly installed with the first bevel gear 22. A second bevel gear 23 is meshed on one side of the first bevel gear 22. Both the first bevel gear 22 and the second bevel gear 23 are installed inside the protective sleeve 26. The second bevel gear 23 is fixedly installed at one end of the fifth connecting rod 24. One end of the fifth connecting rod 24 is fixedly connected to the second rotating plate 25. Through the provided connecting component, during the rotation of the buffer component, the first rotating plate 6 can contact the second rotating plate 25 to drive the second rotating plate 25 to rotate, thereby driving the cleaning component to rotate, enabling the buffer component to provide power for the cleaning component.

[0060] Working principle: First, start the device, and then start the motor 8 through an external power source. The start of the motor 8 drives the rotation of the first connecting rod 7. The rotation of the first connecting rod 7 drives the rotation of the first rotating plate 6. The rotation of the first rotating plate 6 drives the movement of the second connecting rod 10 and the first connecting plate 14. When the first connecting plate 14 contacts the convex block 13, the first connecting plate 14 moves to the side away from the convex block 13. The movement of the first connecting plate 14 drives the rotation of the gear 16. The rotation of the gear 16 drives the rotation of the second connecting rod 10. The rotation of the second connecting rod 10 drives the rotation of the auxiliary block 11.

[0061] At the same time, the movement of the first connecting plate 14 drives the second connecting plate 15 to slide inside the inner wall of the first rotating plate 6, causing the second connecting plate 15 to squeeze the spring 17 and move towards the fixing plate 18. When the first connecting plate 14 is no longer in contact with the convex block 13, under the action of the spring 17, the second connecting plate 15 moves in the reverse direction, causing the first connecting plate 14 to move towards one end of the convex block 13. Similarly, the movement of the first connecting plate 14 drives the rotation of the gear 16. The rotation of the gear 16 drives the rotation of the second connecting rod 10.

[0062] When the first rotating plate 6 rotates and contacts the second rotating plate 25, the rotation of the first rotating plate 6 drives the rotation of the second rotating plate 25. The rotation of the second rotating plate 25 drives the rotation of the fifth connecting rod 24. The rotation of the fifth connecting rod 24 drives the rotation of the second bevel gear 23. The rotation of the second bevel gear 23 drives the rotation of the first bevel gear 22. The rotation of the first bevel gear 22 drives the rotation of the fourth connecting rod 20. The rotation of the fourth connecting rod 20 drives the rotation of the cleaning plate 19. The rotation of the cleaning plate 19 drives the brush bristles 21 to clean the inner wall of the filter screen 9.

[0063] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" - "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process - method - article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process - method - article or device.

[0064] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid inlet device for a falling film absorption tower used in chemical production, characterized in that: Including: A liquid storage tank (1), a connecting pipe (2), a connecting part (3), a falling film absorption tower main body (4) and an air outlet pipe (5); The liquid storage tank (1) is used for storing liquid caustic soda; The connecting pipe (2) is a pipe for connecting the liquid storage tank (1) and the falling film absorption tower main body (4); The air outlet pipe (5) is used for discharging the treated gas; One side of the liquid storage tank (1) is fixedly connected to the connecting pipe (2), the outer wall of the connecting pipe (2) is fixedly connected to the connecting part (3), one end of the connecting pipe (2) far from the liquid storage tank (1) is fixedly connected to the falling film absorption tower main body (4), there are multiple falling film absorption tower main bodies (4), the top of one of the falling film absorption tower main bodies (4) is fixedly connected to the air outlet pipe (5), and a buffer assembly is arranged inside the connecting part (3); Among them, the buffer assembly includes a first rotating plate (6) arranged inside the connecting part (3), a rotating assembly is arranged on the side wall of the first rotating plate (6), a first connecting rod (7) is fixedly connected to the inner wall of the first rotating plate (6), a second connecting rod (10) on the side wall of the first rotating plate (6), the second connecting rods (10) are evenly installed on one side of the first rotating plate (6), one end of each second connecting rod (10) is embedded in the side wall of the first rotating plate (6) and is rotatably connected, auxiliary blocks (11) are evenly distributed on the outer wall of each second connecting rod (10), a moving assembly is arranged inside the first connecting rod (7), one end of the first connecting rod (7) is embedded in the inner wall of the connecting part (3) and is rotatably connected, the other end of the first connecting rod (7) passes through the inner wall of the connecting part (3) and extends to one side of the connecting part (3), a motor (8) is arranged on one side of the connecting part (3), the motor (8) is fixedly installed at one end of the first connecting rod (7), the moving assembly includes a third connecting rod (12) arranged inside the first connecting rod (7), both ends of the third connecting rod (12) are embedded in the inner wall of the connecting part (3) and are fixedly connected, bumps (13) are evenly arranged on the outer wall of the third connecting rod (12) and are fixedly connected, a first connecting plate (14) is arranged at one end of each bump (13) far from the third connecting rod (12), a second connecting plate (15) is fixedly installed at the top of each first connecting plate (14), a restoring assembly is arranged at the top of each second connecting plate (15), each second connecting plate (15) is embedded in the inner wall of the first rotating plate (6) and is slidably connected, a gear (16) is meshed on one side of each first connecting plate (14), the gear (16) is fixedly installed at one end of the second connecting rod (10), a filter screen (9) is arranged on one side of the first rotating plate (6), the filter screen (9) is fixedly installed on the inner wall of the connecting pipe (2), and a cleaning assembly is arranged on one side of the filter screen (9).

2. The liquid inlet device of a falling film absorption tower for chemical production according to claim 1, characterized in that: The first rotating plate (6) is uniformly installed on the outer wall of the first connecting rod (7) in a circumferential array. The first rotating plate (6) is slidably connected to the connecting portion (3), and the diameter of the first rotating plate (6) is the same as that of the connecting portion (3).

3. The liquid inlet device for a falling film absorption tower used in chemical production according to claim 1, characterized in that: The restoring component includes a spring (17) arranged at the top of the second connecting plate (15). A fixing plate (18) is arranged at the top of the spring (17). The two ends of the spring (17) are respectively fixedly connected to the second connecting plate (15) and the fixing plate (18).

4. The feed liquid device of the falling film absorption tower for chemical production according to claim 1, characterized in that: The tops of the convex block (13) and the first connecting plate (14) are both arranged as inclined surfaces. The convex block (13) is slidably connected to the first connecting plate (14).

5. A liquid inlet device for a falling film absorption tower used in chemical production according to claim 1, characterized in that: The cleaning component includes a cleaning plate (19) arranged on one side of the filter screen (9). The cleaning plate (19) is uniformly installed on the outer wall of the fourth connecting rod (20) in a circumferential array. The fourth connecting rod (20) is arranged on one side of the first rotating plate (6). A connecting component is arranged between the fourth connecting rod (20) and the first rotating plate (6). A brush (21) is fixedly installed on one side of each cleaning plate (19) close to the filter screen (9).

6. The liquid inlet device for a falling film absorption tower used in chemical production according to claim 5, characterized in that: The brushes (21) are uniformly distributed on one side of the cleaning plate (19), and one end of the brush (21) is arranged in an arc shape.

7. The feed liquid device of the falling film absorption tower for chemical production according to claim 5, wherein: The connecting component includes a first bevel gear (22) arranged between the fourth connecting rod (20) and the first rotating plate (6). The first bevel gear (22) is fixedly installed at one end of the fourth connecting rod (20) away from the cleaning plate (19). A second bevel gear (23) is meshed on one side of the first bevel gear (22). The first bevel gear (22) and the second bevel gear (23) are both installed inside the protective sleeve (26). The second bevel gear (23) is fixedly installed at one end of the fifth connecting rod (24). One end of the fifth connecting rod (24) is fixedly connected to a second rotating plate (25).

8. A method for feeding liquid into a falling film absorption tower for chemical production, using the feeding device according to claim 1, characterized in that: S1: Start the device and the motor (8); S2: Liquid caustic soda flows from the inside of the liquid storage tank (1) into the inside of the connecting pipe (2). The first rotating plate (6) rotates and contacts the liquid caustic soda. At the same time, the rotation of the first rotating plate (6) drives the rotation of the second connecting rod (10), so that the auxiliary block (11) rotates to stir the liquid caustic soda; S3: When the first rotating plate (6) rotates and contacts the second rotating plate (z), the rotation of the first rotating plate (6) drives the rotation of the second rotating plate (25), thereby driving the rotation of the cleaning plate (19). The rotation of the cleaning plate (19) drives the brushes (21) to clean the inner wall of the filter screen (9); S4: The liquid caustic soda is sprayed out from the nozzle to contact the harmful gas for treatment, and the treated gas is discharged from the air outlet pipe (5).

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