Corrosion-resistant falling film absorption device based on silicon carbide tube nest

Abstract

The utility model belongs to the field of waste gas treatment, and particularly relates to a corrosion-resistant falling film absorption device based on silicon carbide tubes, which comprises an upper-section absorption part, a middle-section absorption part and a lower-section discharge part which are sequentially butted up and down, a plurality of longitudinally-arranged absorption pipes are installed in the middle-section absorption part through a fixed arc plate, a cooling liquid opening is formed in the outer side wall of the middle-section absorption part, the lower-section discharge part comprises a lower pipeline and a discharging connector, a drain outlet is formed in the outer side wall of the lower pipeline, and the discharging connector is arranged below the lower-section discharge part. According to the device, liquid can be assisted to be uniformly distributed through the convex structure of the distributor, 'dry areas' are reduced, an electric cylinder drives an inner scraper to clean impurities, the distributor is prevented from being blocked, the silicon carbide absorption pipe is high in strength and resistant to corrosion, mass transfer efficiency, universality and structural stability are considered in the design of the pipe diameter, the wall thickness and the length, and long-term stable operation of equipment is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment, and in particular relates to a corrosion-resistant falling film absorption device based on silicon carbide tube array. Background Technology

[0002] Falling film absorbers are a type of high-efficiency chemical mass transfer equipment, mainly used in gas-liquid mass transfer processes. Their core function is to achieve rapid absorption, reaction, or heat transfer by forming a thin film of liquid on a vertical surface and contacting the gas.

[0003] Although falling film absorption devices are highly efficient, existing technologies still have the following key drawbacks, which directly affect their performance and reliability:

[0004] 1. Traditional orifice plate distributors are prone to clogging of the distribution pores by impurities (such as CaSO4 crystals, polymer adhesion), resulting in "dry zones" in the liquid film and a decrease in absorption efficiency;

[0005] 2. Most absorption tubes on the market are made of plastic. This design makes the inner wall of the absorption tube prone to crystallization (such as NH4Cl, Na2SO4) or corrosion and perforation (HCl gas conditions), requiring frequent shutdowns for cleaning, which affects production efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a corrosion-resistant falling film absorption device based on silicon carbide tube arrays to solve the problems existing in the prior art.

[0007] To achieve the above objectives, the present invention adopts a corrosion-resistant falling film absorption device based on silicon carbide tube arrays, comprising an upper absorption section, a middle absorption section, and a lower discharge section connected sequentially. The upper absorption section is provided with a liquid inlet assembly and a vent. The middle absorption section has multiple longitudinally arranged absorption tubes installed inside by a fixed arc plate. A coolant port is provided on the outer wall of the middle absorption section. The lower discharge section includes a lower pipe and a discharge port. The lower pipe is located below the middle absorption section, and the discharge port is located below the lower pipe. A drain port is provided on the outer wall of the lower pipe, and a filter inlet is located below the drain port. An activated carbon plate is placed inside the filter inlet, and a plug is provided on the filter inlet to seal the filter inlet. A discharge port is located below the lower discharge section.

[0008] The upper absorption section includes an upper end plate, an upper pipe, a partition, a distributor, an electric cylinder, a top plate, and an inner scraper. The upper end plate is located above the middle absorption section, the upper pipe is located above the upper end plate, the partition is located inside the upper pipe, and the upper pipe is divided into an upper cavity and a lower cavity by the partition. The distributor is located below the partition and has multiple holes of the same shape and size as the absorption tube running through it. The absorption tube extends through the upper end plate into the distributor and is adapted to and communicates with the holes on the distributor. The electric cylinder is located on the periphery of the lower cavity and its output end extends into the upper cavity. The top plate is located on the output end of the electric cylinder. The inner scraper is located below the top plate and has the same position and shape as the absorption tube below it. The inner scraper is sealed at both ends and can slide up and down inside the distributor.

[0009] The middle section absorption unit includes a middle pipe, a lower end plate, a ring cover, and a piezoelectric ceramic vibrator. The middle pipe is located below the upper end plate. Multiple longitudinally arranged absorption tubes are installed inside the middle pipe through a fixed arc plate. The lower end plate is located below the middle pipe. The ring cover is located around the absorption tubes. The piezoelectric ceramic vibrator is located inside the ring cover.

[0010] Preferably, the absorption tube is made of silicon carbide and has multiple longitudinal grooves on its inner circumference.

[0011] Preferably, the liquid inlet assembly includes a liquid inlet pipe, a filter element, a refrigeration coil, a compressor refrigeration system, and a piezoelectric ceramic fine-tuning valve. The liquid inlet pipe is located above the upper pipe, the filter element is located inside the liquid inlet pipe, the refrigeration coil is located below the filter element, the compressor refrigeration system is located above the upper pipe and is electrically connected to the refrigeration coil, and the piezoelectric ceramic fine-tuning valve is located on the liquid inlet pipe for controlling the opening and closing of the liquid.

[0012] Preferably, the upper surface of the distributor is provided with a plurality of protrusions, which are arranged around the periphery of the distributor hole.

[0013] Preferably, the fixed arc plate has multiple arc-shaped and discontinuously distributed sections along its length.

[0014] Preferably, the outer periphery of the central pipe is provided with multiple lifting ports.

[0015] Preferably, the absorption tube has a diameter of 30-100 mm, a wall thickness of 3-10 mm, and a length of 1-6 m.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] This invention utilizes an electric cylinder, top plate, and inner scraper structure in the upper absorption section. The electric cylinder drives the inner scraper to slide up and down within the distributor, promptly removing crystalline impurities and preventing uneven liquid film formation due to blockage. This ensures sufficient gas-liquid contact and improves absorption efficiency. The middle section uses silicon carbide tubes instead of traditional plastic materials. Their high strength and corrosion resistance resist crystallization and corrosion, reducing downtime maintenance frequency. The piezoelectric ceramic vibrator inside the ring shroud vibrates, which can clean the crystals on the inner wall of the absorption tube to a certain extent, further improving the absorption effect. The lower section's drain port, filter inlet, and activated carbon plate facilitate the discharge of impurities and the purification of the discharge, preventing impurity accumulation from affecting equipment operation, ensuring stable equipment operation, and extending service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional view of the overall structure of a corrosion-resistant falling film absorption device based on silicon carbide tubes;

[0020] Figure 2 This is a schematic diagram of the internal structure of the central pipeline;

[0021] Figure 3 This is a schematic diagram of the internal structure of the upper pipeline;

[0022] Figure 4 This is a schematic diagram of the liquid inlet assembly;

[0023] Figure 5 This is a schematic diagram of the absorption tube.

[0024] In the above figures, 1. Upper absorption section, 2. Middle absorption section, 3. Lower discharge section, 4. Vent, 5. Liquid inlet assembly, 501. Liquid inlet pipe, 502. Filter element, 503. Refrigeration coil, 504. Compressor refrigeration system, 505. Piezoelectric ceramic fine-tuning valve, 6. Coolant port, 7. Filter inlet, 8. Plug, 9. Discharge interface, 10. Drain outlet, 11. Lifting port, 12. Upper pipe, 13. Middle pipe, 14. Lower pipe, 15. Absorption pipe, 16. Fixed arc plate, 17. Upper end plate, 18. Lower end plate, 19. Upper cavity, 20. Lower cavity, 21. Electric cylinder, 22. Top plate, 23. Inner scraper, 24. Baffle, 25. Distributor, 26. Protrusion, 27. Inner groove, 28. Ring cover, 29. Piezoelectric ceramic vibrator. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example 1, such as Figure 1-5As shown, the specific design of the key components mentioned above is described below: A corrosion-resistant falling film absorption device based on silicon carbide tube array includes an upper absorption section 1, a middle absorption section 2, and a lower discharge section 3 connected sequentially. The upper absorption section 1 has a liquid inlet assembly 5 and a vent 4 above it. The middle absorption section 2 has multiple longitudinally arranged absorption tubes 15 installed inside it via a fixed arc plate 16. A coolant inlet 6 is provided on the outer wall of the middle absorption section 2. The lower discharge section 3 includes a lower pipe 14 and a discharge port 9. The lower pipe 14 is located in the middle... Below the middle absorption section 2, below the drain outlet 10, there is a filter inlet 7. An activated carbon plate is placed inside the filter inlet 7, and a plug 8 is provided on the filter inlet 7 to seal it. Below the lower discharge section 3, there is a discharge port 9. The upper absorption section 1 includes an upper end plate 17, an upper pipe 12, a baffle 24, a distributor 25, an electric cylinder 21, a top plate 22, and an inner scraper. The upper end plate 17 is located above the middle absorption section 2, the upper pipe 12 is located above the upper end plate 17, and the baffle 24 is located inside the upper pipe 12. The interior of chamber 12 is divided into an upper chamber 19 and a lower chamber 20 by a partition 24. A distributor 25 is located below the partition 24. The distributor 25 has multiple holes of the same shape and size as the absorption tube 15 extending vertically through it. The absorption tube 15 extends through the upper end plate 17 into the distributor 25 and connects with the holes on the distributor 25. An electric cylinder 21 is located on the periphery of the lower chamber 20, and its output end extends into the upper chamber 19. A top plate 22 is located on the output end of the electric cylinder 21, and an inner scraper is located below the top plate 22. The inner scraper and the lower absorption tube 15 are in the same position and shape. The inner scraper is sealed at both ends and can slide up and down inside the absorption tube 15. The middle absorption section 2 includes a middle pipe 13, a lower end plate 18, a ring cover 28 and a piezoelectric ceramic vibrator 29. The middle pipe 13 is located below the upper end plate 17. Multiple longitudinally arranged absorption tubes 15 are installed inside the middle pipe 13 through a fixed arc plate 16. The lower end plate 18 is located below the middle pipe 13. The ring cover 28 is located around the absorption tube 15. The piezoelectric ceramic vibrator 29 is located inside the ring cover 28.The liquid inlet assembly 5 includes an inlet pipe 501, a filter element 502, a refrigeration coil 503, a compressor refrigeration system 504, and a piezoelectric ceramic fine-tuning valve 505. The inlet pipe 501 is located above the upper pipe 12, the filter element 502 is located inside the inlet pipe 501, the refrigeration coil 503 is located below the filter element 502, the compressor refrigeration system 504 is located above the upper pipe 12 and is electrically connected to the refrigeration coil 503, and the piezoelectric ceramic fine-tuning valve 505 is located on the inlet pipe 501 to control the opening and closing of the liquid flow. The piezoelectric ceramic material has high chemical stability, strong corrosion resistance and wear resistance, and a long service life. The upper surface of the distributor 25 is provided with multiple protrusions. The protrusions 26 are arranged around the holes of the distributor 25. The fixed arc plate 16 has multiple arc-shaped and discontinuously distributed plates along its length. The outer periphery of the central pipe 13 has multiple lifting ports 11, which facilitate the lifting of the device. The diameter of the absorption pipe 15 is 30-100mm, the wall thickness is 3-10mm, and the length is 1-6m. The reasonable design of the diameter, wall thickness, and length of the absorption pipe 15 ensures the gas-liquid contact area and improves the mass transfer efficiency. The appropriate wall thickness enhances the structural strength and corrosion resistance. The length setting takes into account the equipment space layout and absorption stroke, effectively reducing pressure drop and ensuring a stable and efficient absorption process, meeting the usage requirements under different working conditions. This device significantly improves performance through structural and component innovation. The liquid inlet component 5 integrates filtration and cooling functions, purifying liquids and regulating temperature. The piezoelectric ceramic fine-tuning valve 505 precisely controls the liquid flow. The protrusion 26 structure of the distributor 25 helps to distribute the liquid evenly and reduce "dry zones". The electric cylinder 21 drives the internal scraper to clean impurities and prevent the distributor 25 from clogging. The silicon carbide absorption tube 15 is high-strength and corrosion-resistant. The design of the tube diameter, wall thickness and length takes into account mass transfer efficiency, universality and structural stability. The lifting port 11 on the middle pipe 13 facilitates equipment hoisting. The discharge section 3 at the bottom ensures the long-term stable operation of the equipment.

[0028] Vent 4 connects to an external device for input gas, allowing the processed gas to enter the upper chamber 19 inside the upper pipe 12. The processed liquid enters the upper pipe 12 through the liquid inlet assembly 5 and then through the liquid inlet pipe 501 into the upper chamber 19. It is filtered by the filter element 502, and then cooled by the compressor refrigeration system 504 and the refrigeration coil 503. A piezoelectric ceramic fine-tuning valve 505 controls the opening and closing of the liquid flow. The liquid inlet pipe 501 and vent 4 pass through the top plate 22, facilitating the entry of liquid and gas. The protrusion 26 on the distributor 25 prevents liquid from accumulating on its surface. The material is collected and processed to enter the absorption pipe 15. To prevent blockage on the distributor 25 due to material accumulation during long-term use, the top plate 22 can be moved up and down by starting the electric cylinder 21. The inner scraper 23 below the top plate 22 cooperates with the hole on the distributor 25. The top plate 22 can be moved up and down by starting the electric cylinder 21. The inner scraper 23 below the top plate 22 can extend and retract in the hole on the distributor 25 to directly unclog and remove blockages. The partition 24 can separate the upper chamber 19 and the lower chamber 20, so that the electric cylinder 21 carried in the lower chamber 20 is protected from water. Sealant is applied at the position where the partition 24 contacts the inner wall of the upper pipe 12 to form a good sealed driving environment in the lower chamber 20.

[0029] Both the upper end plate 17 and the lower end plate 18 of the absorption tube 15 provide a sealing function. Material is introduced into the coolant inlet 6, creating a coolant-carrying area inside the middle pipe 13. The fixed arc plate 16 not only strengthens the fixation of the absorption tube 15 but also facilitates material flow, ensuring the outer periphery of the absorption tube 15 is filled with coolant. To prevent impurities from accumulating inside the absorption tube 15 during prolonged use, the piezoelectric ceramic vibrator 29 vibrates, causing impurities adhering to the inner wall of the absorption tube 15 to fall off. The piezoelectric ceramic vibrator 29 is sealed and protected by the ring cover 28 to prevent water intrusion. Finally, the processed material is discharged through the lower pipe 14 and the discharge port 9. Opening the plug 8 opens the filter inlet 7, where an activated carbon plate is placed for primary filtration and adsorption. The material from the absorption tube 15 can then be... Material is discharged through the feeding port 9, and sewage in the central pipe 13 can be discharged through the drain port 10. The absorption pipe 15 is made of silicon carbide and has multiple inner grooves 27 along its length on its inner circumference. Silicon carbide is resistant to all concentrations of hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, and is resistant to strong alkali halogens and organic solvents, effectively enhancing its corrosion resistance. The inner grooves 27 are straight with a depth of 0.1-0.5 mm and a width of 1-3 mm, increasing the actual gas-liquid contact area by 20%-40%. The high thermal conductivity of SiC, combined with the structure of the inner grooves 27, increases the heat flux and effectively controls the exothermic reaction temperature. For example, the temperature rise of HCl absorption is reduced by 10-15℃. The vertical inner grooves 27 divide the liquid film into multiple independent thin layers, avoiding the liquid film aggregation caused by surface tension in traditional falling film production, and providing a uniformly divided parallel micro-liquid film. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A corrosion-resistant falling-film absorption device based on silicon carbide tubes, comprising an upper absorption section, a middle absorption section and a lower discharge section which are butted together in sequence, characterized in that, The upper absorption section is provided with a liquid inlet assembly and a vent. The middle absorption section is equipped with multiple longitudinally arranged absorption tubes installed inside by a fixed arc plate. The outer wall of the middle absorption section is provided with a coolant port. The lower discharge section includes a lower pipe and a discharge port. The lower pipe is located below the middle absorption section. The discharge port is located below the lower pipe. The outer wall of the lower pipe is provided with a drain port. The drain port is located below the drain port. An activated carbon plate is placed inside the filter port. A plug is provided on the filter port to seal the filter port. The discharge port is located below the lower discharge section. The upper absorption section includes an upper end plate, an upper pipe, a partition, a distributor, an electric cylinder, a top plate, and an inner scraper. The upper end plate is located above the middle absorption section, the upper pipe is located above the upper end plate, the partition is located inside the upper pipe, and the upper pipe is divided into an upper cavity and a lower cavity by the partition. The distributor is located below the partition and has multiple holes of the same shape and size as the absorption tube running through it. The absorption tube extends through the upper end plate into the distributor and is adapted to and communicates with the holes on the distributor. The electric cylinder is located on the periphery of the lower cavity and its output end extends into the upper cavity. The top plate is located on the output end of the electric cylinder. The inner scraper is located below the top plate and has the same position and shape as the absorption tube below it. The inner scraper is sealed at both ends and can slide up and down inside the distributor. The middle section absorption unit includes a middle pipe, a lower end plate, a ring cover, and a piezoelectric ceramic vibrator. The middle pipe is located below the upper end plate. Multiple longitudinally arranged absorption tubes are installed inside the middle pipe through a fixed arc plate. The lower end plate is located below the middle pipe. The ring cover is located around the absorption tubes. The piezoelectric ceramic vibrator is located inside the ring cover.

2. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 1, characterized in that, The absorption tube is made of silicon carbide and has multiple inner grooves along its length on its inner circumference.

3. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 2, characterized in that, The liquid inlet assembly includes an inlet pipe, a filter element, a refrigeration coil, a compressor refrigeration system, and a piezoelectric ceramic fine-tuning valve. The inlet pipe is located above the upper pipe, the filter element is located inside the inlet pipe, the refrigeration coil is located below the filter element, the compressor refrigeration system is located above the upper pipe and is electrically connected to the refrigeration coil, and the piezoelectric ceramic fine-tuning valve is located on the inlet pipe to control the opening and closing of the liquid.

4. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 3, characterized in that, The upper surface of the distributor is provided with multiple protrusions, which are arranged around the periphery of the distributor hole.

5. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 4, characterized in that, The fixed arc plate has multiple arc-shaped and discontinuously distributed sections along its length.

6. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 5, characterized in that, The outer periphery of the central pipeline is provided with multiple lifting ports.

7. A corrosion resistant falling film absorption device based on silicon carbide tubes according to claim 6, characterized in that, The absorption tube has a diameter of 30-100mm, a wall thickness of 3-10mm, and a length of 1-6m.

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