Modular quick-release absorption tower and online maintenance method thereof

Abstract

This invention discloses a modular quick-disassembly absorption tower and its online maintenance method. The absorption tower includes a tower body, at least one drawer-type flat membrane tank unit arranged along the axial direction of the tower body, a membrane tank support assembly for supporting each drawer-type flat membrane tank unit, a liquid supply assembly disposed above each drawer-type flat membrane tank unit, and a louvered fluid control assembly disposed between the liquid supply assembly and the drawer-type flat membrane tank unit. The membrane tank support assembly can regulate the airflow channel inside the tower and eliminate the gas bypass effect. During normal operation, the louvered fluid control assembly opens its blades to assist in liquid distribution; during maintenance, it closes to form a liquid interception barrier, directing the liquid to the side of the membrane tank. This device retains the advantages of low pressure drop and high-throughput mass transfer while solving the spray safety hazards and gas leakage problems during online module replacement through mechanical isolation, achieving online maintenance without shutting down the system.

Description

Technical Field

[0001] This invention belongs to the technical field of chemical gas-liquid mass transfer equipment, specifically relating to a gas-liquid contact device for processes such as acid gas purification and tail gas treatment, and particularly to a modular quick-disassembly absorption tower and its online maintenance method. Background Technology

[0002] Absorption towers are core equipment in natural gas desulfurization, flue gas decarbonization, and industrial tail gas purification processes. Traditional absorption towers typically use welding or bolting to fix internal components to the tower body, forming a rigid, integral structure. This structure has significant maintenance limitations during long-term operation: if the core mass transfer components inside the tower experience localized fouling, blockage, or corrosion damage, it often requires shutting down the entire tower, purging, purging, and manual inspection. This not only leads to production interruptions and substantial economic losses but also poses safety risks associated with confined space operations.

[0003] Existing technologies for the installation and maintenance of absorption towers mainly focus on the rapid construction of the tower body or the hoisting and replacement of specific components. Patent CN119550012A discloses a method for replacing the top spray main pipe of an absorption tower. This method uses a moving trolley, guide rails, and a rotating pallet, along with multiple hoists working in tandem, to remove the damaged main pipe from the tower. While this method solves the problem of replacing specific large components to some extent, it suffers from technical drawbacks such as complex construction processes, long preparation periods, and the requirement for the entire tower to be shut down, emptied, and replaced before it can be performed. Patent CN106593065A discloses a rapid tower installation method using a hydraulic lifting device and an inverted installation process to achieve simultaneous and rapid assembly of the tower body and the flue gas outlet pipe. This technology addresses the issues of large-scale construction and efficiency during the absorption tower construction phase, but it does not improve the convenience of operation and maintenance after the tower is completed and put into operation. If the core mass transfer components inside the tower become locally fouled, clogged, or damaged, the entire tower still needs to be shut down for maintenance due to its integral or semi-permanent fixed connection method. The disassembly process is cumbersome and time-consuming, which seriously affects the annual operating hours and economic benefits of the unit.

[0004] In summary, existing absorption tower technologies suffer from technical problems such as difficulty in replacing internal components, long maintenance cycles, and the inability to perform partial online maintenance. Therefore, developing an absorption tower device with standardized structure, rapid interface, and the ability to independently replace faulty units while maintaining the operation of the main tower body is a pressing technical challenge that needs to be addressed in this field. Summary of the Invention

[0005] To address the technical problems in existing absorption towers, such as the need for complete tower shutdown for maintenance of internal components and the safety hazards of online maintenance liquid spraying in traditional modular designs, this invention provides a modular quick-disassembly absorption tower and its online maintenance method. This device achieves online maintenance of localized levels while the tower is in continuous operation by incorporating mechanically linked fluid control components and membrane support components between layers.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a modular quick-release absorption tower is provided, the absorption tower comprising a tower body, at least one drawer-type flat membrane box unit arranged along the axial direction of the tower body, a membrane box support assembly for supporting each drawer-type flat membrane box unit, a liquid supply assembly disposed above each drawer-type flat membrane box unit, and a louvered fluid control assembly disposed between the liquid supply assembly and the drawer-type flat membrane box unit; wherein:

[0008] The drawer-type flat membrane box unit includes a main frame and a flat membrane assembly disposed within the main frame; the flat membrane assembly consists of several vertically arranged flat plates; a walking component is disposed at the bottom of the main frame;

[0009] The louvered fluid control assembly is used to control the flow or cut-off of the liquid coming from above, and includes several guide vanes and a through-wall drive mechanism for driving the guide vanes to rotate.

[0010] The membrane box support assembly includes a sealing plate and a track that matches the walking assembly. The sealing plate has through holes corresponding to the flat membrane assembly, and the track is arranged on both sides of the through holes.

[0011] The sidewalls of the tower are provided with disassembly and assembly ports at positions corresponding to each drawer-type flat membrane box unit.

[0012] Furthermore, the guide vanes have a V-shaped or arc-shaped structure, both of which include a first vane and a second vane;

[0013] The guide vane includes several axisymmetric guide vanes and one non-axisymmetric guide vane located near the disassembly / removal port.

[0014] The first and second blades of the axisymmetric guide vane are of equal length;

[0015] The length of the second blade of the non-axisymmetric guide vane is 1 / 4 to 1 / 3 of the length of the first blade.

[0016] Furthermore, in the operating mode, the axisymmetric guide vanes have their openings facing right and are arranged sideways, while the non-axisymmetric guide vanes have their openings facing downward, forming a smooth liquid flow channel.

[0017] In maintenance mode, the openings of the axisymmetric guide vanes face downwards, and the openings of the non-axisymmetric guide vanes face left; adjacent guide vanes abut against each other, forming a continuous wavy liquid interception shield layer above the drawer-type flat membrane box unit.

[0018] Furthermore, the through-wall drive mechanism includes a linkage rod located inside the tower body for connecting each guide vane, a sealed drive shaft passing through the side wall of the tower body, and a maintenance operation handle disposed on the outer wall of the tower body; the inner end of the sealed drive shaft is connected to the linkage rod, and the outer end is connected to the maintenance operation handle.

[0019] Furthermore, the sealing plate is provided with a plurality of drainage holes, and a one-way drainage valve is provided in each drainage hole.

[0020] Furthermore, the front end of the drawer-type flat membrane box unit is provided with a membrane box unit sealing assembly. The membrane box unit sealing assembly includes a front panel body, an operating handle disposed on the outside of the front panel body, and a panel sealing gasket and a positioning guide wedge disposed on the inside of the front panel body. The positioning guide wedge is disposed on the upper and lower sides of the front panel body.

[0021] The tower body has wedge-shaped mating grooves on the upper and lower sides of the disassembly and assembly port that match the positioning guide wedges, and the tower body has quick-locking buckles on the left and right sides of the disassembly and assembly port.

[0022] Furthermore, the absorption tower also includes an intelligent feedback control system, which includes pressure detectors installed on the upper and lower sides of each drawer-type flat membrane box unit to monitor pressure drop changes.

[0023] The top of the tower body is provided with an air outlet, and the bottom is provided with a liquid tank;

[0024] The intelligent feedback control system also includes a gas concentration detector located at the gas outlet and a liquid level monitor located at the liquid tank.

[0025] Furthermore, the absorption tower also includes a fluid transport and control system, which includes a main supply pipe and several branch supply pipes. Each branch supply pipe is equipped with a corresponding spray control valve. The main supply pipe is connected to the liquid tank and the branch supply pipes, and the branch supply pipes are connected to the supply assembly.

[0026] Secondly, an online maintenance method for the aforementioned modular quick-release absorption tower is provided, including the following steps:

[0027] S1: Monitor the voltage drop changes of each drawer-type flat membrane box unit. When the voltage drop of a certain layer is abnormal, it is determined to be a faulty layer.

[0028] S2: Close the liquid supply component corresponding to the drawer-type flat membrane box unit of the faulty layer; then drive the guide vane above the layer to switch to maintenance mode through the through-wall drive mechanism, so that the guide vane closes to cut off the liquid falling from the upper layer, and guides the liquid to flow down from the side of the drawer-type flat membrane box unit and fall into the sealing plate.

[0029] S3: After the residual liquid in the drawer-type flat plate membrane box unit of the faulty layer has drained, use the walking component to move the faulty drawer-type flat plate membrane box unit horizontally out of the tower; then push the spare drawer-type flat plate membrane box unit into the tower.

[0030] S4: Reset the louvered fluid control component to the operating mode and restart the fluid supply component.

[0031] Furthermore, in steps S2-S4, the spray flow rate controlled by the liquid supply components of the remaining operating levels is adjusted to compensate for the loss of mass transfer efficiency caused by the shutdown of the faulty level.

[0032] (1) This device precisely cuts off the liquid supply and physically isolates the maintenance station through the coordinated operation of “closing the spray first and then cutting off the liquid”. This completely solves the industry pain point that traditional absorption tower maintenance requires the entire tower to be shut down and emptied. The core components can be repaired and replaced without shutdown, significantly improving the annual operating rate of the device and reducing downtime losses.

[0033] (2) The present invention effectively eliminates the gas bypass effect in the tower by sealing plate, and constructs a regular vertical gas flow channel with flat membrane internals, so that the gas flow is distributed in piston flow. At the same time, the liquid film-gas flow contact mode is adopted to significantly reduce the gas phase pressure drop, avoid flooding, and further improve the mass transfer efficiency and the stability of the device operation.

[0034] (3) The present invention utilizes the membrane box unit sealing component and the wedge-shaped matching structure of the tower body and quick snap-fit, which can complete the module docking and sealing without disassembling the bolts, effectively preventing the leakage of toxic gases, while simplifying the operation process and reducing maintenance costs.

[0035] (4) The present invention integrates pressure drop monitoring, gas concentration and liquid monitoring system, which can accurately locate faulty modules through pressure drop changes and compensate by automatically adjusting the spray parameters of other levels, so as to ensure that the device can still meet environmental emission requirements even when one less module is in operation, and achieve stable operation without human intervention around the clock. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the modular quick-release absorption tower of the present invention.

[0037] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0038] Figure 3 This is a schematic diagram of gas-liquid flow between adjacent flat plates.

[0039] Figure 4 This is a schematic diagram showing the relative positions of the drawer-type flat membrane box unit and the membrane box support assembly.

[0040] Figure 5 This is a top view of the membrane box support assembly.

[0041] Figure 6 This is a side view of the membrane box support assembly.

[0042] Figure 7 This is a schematic diagram of the louvered fluid control component in operation mode.

[0043] Figure 8 This is a schematic diagram of the louvered fluid control component in maintenance mode.

[0044] Figure 9 yes Figure 1 A cross-sectional view along the AA direction.

[0045] In the picture:

[0046] 10-Tower body; 11-Air inlet; 12-Air outlet; 13-Liquid inlet; 14-Liquid outlet; 15-Liquid tank;

[0047] 20-Drawer-type flat membrane box unit; 21-Main frame; 22-Flat plate; 23-Moving assembly; 24-Front panel body; 25-Operating handle; 26-Panel sealing gasket; 27-Positioning guide wedge;

[0048] 30-Membrane box support assembly; 31-Sealing plate; 32-Railway; 33-Through hole; 34-Drain hole;

[0049] 40 - Liquid supply assembly; 41 - Main liquid supply pipe; 42 - Branch liquid supply pipe; 43 - Spray control valve;

[0050] 50-Louvre-type fluid control assembly; 51-Guide vane; 52-First vane; 53-Second vane; 54-Linkage rod; 55-Sealed drive shaft; 56-Maintenance operation handle;

[0051] 61-Gas concentration detector; 62-Liquid monitoring instrument. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] Example 1: A modular quick-release absorption tower:

[0054] refer to Figure 1 and Figure 2 As shown, this embodiment provides a modular quick-release absorption tower, including a tower body 10, at least one drawer-type flat membrane box unit 20 arranged axially along the tower body 10, a membrane box support assembly 30 for supporting each drawer-type flat membrane box unit 20, a liquid supply assembly 40 disposed above each drawer-type flat membrane box unit 20, and a louvered fluid control assembly 50 disposed between the liquid supply assembly 40 and the drawer-type flat membrane box unit 20; wherein:

[0055] The tower body 10 has an air inlet 11 and a liquid outlet 14 at its bottom, and an air outlet 12 at its top. Each layer of the tower body 10 has a liquid inlet 13 corresponding to a liquid supply assembly 40, allowing the gas and liquid phases to flow counter-currently within the tower body 10. The sidewalls of the tower body 10 have disassembly / removal ports (not shown in the figure) corresponding to each drawer-type flat membrane box unit 20, for the pull-out installation and disassembly of the drawer-type flat membrane box unit 20. A liquid tank 15 is also provided at the bottom of the tower body 10.

[0056] Combination Figure 3 As shown, the drawer-type flat membrane box unit 20 includes a main frame 21 and a flat membrane assembly disposed within the main frame 21; the flat membrane assembly is composed of several vertically arranged flat plates 22, and gas-liquid flow channels are formed between adjacent flat plates 22; a walking component 23 is disposed at the bottom of the main frame 21.

[0057] Combination Figures 4-6 As shown, the membrane box support assembly 30 is fixedly connected to the inner wall of the tower body 10, and is used to support the drawer-type flat membrane box unit 20 and correct the gas flow channel inside the tower. The membrane box support assembly 30 includes a sealing plate 31 and a track 32 that matches the traveling assembly 23. The sealing plate 31 has through holes 33 corresponding to the flat membrane assembly for gas-liquid two-phase flow. The track 32 is arranged on both sides of the through holes 33.

[0058] The sealing plate 31 is provided with a plurality of drainage holes 34, and a one-way drainage valve (not shown in the figure) is provided in each drainage hole 34. The one-way drainage valve allows liquid to pass downward under the action of gravity and is kept closed by the pressure of the rising airflow to block the upward flow of gas. The membrane box support assembly 30 regularizes the circular cross section of the tower body 10 into a rectangular flow channel adapted to the drawer-type flat plate membrane box unit 20, which helps to reduce the bypass flow of gas that rises directly without passing through the flat plate membrane assembly and guides the gas into the flat plate membrane assembly.

[0059] Combination Figures 7-8 As shown, the louvered fluid control assembly 50 is used to control the flow or cutoff of the incoming liquid from above. It includes several guide vanes 51 and a through-wall drive mechanism for driving the guide vanes 51 to rotate. The guide vanes 51 have a V-shaped or arc-shaped structure, each including a first vane 52 and a second vane 53. The guide vanes 51 include several axisymmetric guide vanes and a non-axisymmetric guide vane located near the disassembly port. The first vane 52 and the second vane 53 of the axisymmetric guide vane have equal lengths. The length of the second vane 53 of the non-axisymmetric guide vane is 1 / 4 to 1 / 3 of the length of the first vane 52.

[0060] like Figure 2 As shown, the through-wall drive mechanism includes a linkage rod 54 located inside the tower body 10 and used to connect each guide vane 51, a sealed drive shaft 55 passing through the side wall of the tower body 10, and a maintenance operation handle 56 disposed on the outer wall of the tower body 10. The inner end of the sealed drive shaft 55 is connected to the linkage rod 54, and the outer end is connected to the maintenance operation handle 56. By rotating the maintenance operation handle 56, the linkage rod 54 can be driven to drive each guide vane 51 to rotate synchronously.

[0061] like Figure 7 As shown, in the operating mode, the axisymmetric guide vanes have their openings facing right and are arranged sideways, while the non-axisymmetric guide vanes have their openings facing downwards, forming a smooth liquid flow channel. Liquid from the upper liquid supply assembly 40 is sprayed onto the surface of the guide vanes 51, and after being impacted, divided, and splashed back to achieve secondary uniform distribution, it enters the lower drawer-type flat membrane box unit 20 evenly.

[0062] like Figure 8As shown, in maintenance mode, the through-wall drive mechanism controls the synchronous rotation of each guide vane 51, so that the opening of the axisymmetric guide vane faces downward and the opening of the non-axisymmetric guide vane faces left. Adjacent guide vanes 51 abut against each other, forming a continuous wavy liquid interception shielding layer above the drawer-type flat membrane box unit 20, achieving overall shielding of the membrane box area. The liquid falling from the upper layer is guided along the slope of the guide vane 51 to the front, rear, and left sides of the drawer-type flat membrane box unit 20, falling onto the sealing plate 31 and opening the one-way drain valve in the drain hole 34, and draining layer by layer into the liquid tank 15. Among them, the second blade 53 of the non-axisymmetric guide vane is shorter in length, and can be in an almost vertical position after rotation, which can reduce the liquid dripping to the disassembly port side, avoid affecting the rightward pulling operation of the drawer-type flat membrane box unit 20, and keep the drawer-type flat membrane box unit 20 under maintenance in a dry and isolated state, thereby realizing single-module maintenance without shutting down and emptying the entire tower.

[0063] Furthermore, such as Figure 9 As shown, the front end of the drawer-type flat membrane box unit 20 is provided with a membrane box unit sealing assembly. The membrane box unit sealing assembly includes a front panel body 24, an operating handle 25 disposed on the outside of the front panel body 24, and a panel sealing gasket 26 and a positioning guide wedge 27 disposed on the inside of the front panel body 24. The positioning guide wedge 27 is disposed at the center of the upper and lower sides of the front panel body 24.

[0064] The tower body 10 has a wedge-shaped mating groove that matches the positioning guide wedge 27 at the middle of the upper and lower sides of the disassembly port, which is used to achieve self-alignment when the drawer-type flat membrane box unit 20 is pushed in; the tower body 10 has quick-locking buckles on the left and right sides of the disassembly port (not shown in the figure). After the drawer-type flat membrane box unit 20 is fully pushed in, the front panel body 24 is locked by the quick-locking buckles, and the panel sealing gasket 26 is squeezed to ensure the sealing effect.

[0065] Furthermore, such as Figure 1 As shown, the modular quick-release absorption tower is also equipped with a fluid transport and control system. The fluid transport and control system includes a main liquid supply pipe 41 and several branch liquid supply pipes 42. Each branch liquid supply pipe 42 is equipped with a corresponding spray control valve 43. The main liquid supply pipe 41 is connected to the liquid tank 15 and the branch liquid supply pipes 42. The branch liquid supply pipes 42 are connected to the liquid supply assembly 40 to realize liquid circulation.

[0066] Furthermore, the modular quick-release absorption tower also includes an intelligent feedback control system. The intelligent feedback control system includes pressure detectors (not shown in the figure) installed on the pressure detectors on the upper and lower sides of each drawer-type flat membrane box unit 20. By calculating the pressure difference, it monitors the pressure drop change of each drawer-type flat membrane box unit 20. When the pressure drop of the layer changes abnormally, maintenance is carried out.

[0067] like Figure 1 As shown, the intelligent feedback control system also includes a gas concentration detector 61 installed at the gas outlet 12 of the tower body 10, and a liquid level monitor 62 installed at the liquid tank 15. When any layer of louvered fluid control assembly 50 is in maintenance mode, the flow rate of the liquid supply assembly 40 above the remaining operating layers is automatically adjusted according to the feedback from the gas concentration detector 61; when the pollutant concentration at the gas outlet 12 exceeds a preset threshold and the liquid level monitor 62 shows that the absorbent is saturated, liquid drainage and replenishment are automatically triggered.

[0068] Example 2: Online maintenance method for modular quick-disassembly absorption towers:

[0069] This embodiment provides an online maintenance method for the modular quick-disassembly absorption tower using the above-described embodiment 1, including the following steps:

[0070] S1: Monitor the voltage drop changes of each drawer-type flat sheet membrane box unit. When the voltage drop of a certain layer is abnormal, it is determined to be a faulty layer.

[0071] S2: Close the spray control valve 43 corresponding to the drawer-type flat membrane box unit 20 of the faulty layer; then drive the guide vane 51 above the layer to switch to maintenance mode through the through-wall drive mechanism, so that the guide vane 51 closes to cut off the liquid falling from the upper layer, and guides the liquid to flow down to the side of the drawer-type flat membrane box unit 20 and fall into the sealing plate 31.

[0072] S3: After the residual liquid in the drawer-type flat membrane box unit 20 of the faulty layer has drained, loosen the quick-locking buckle on the outside of the drawer-type flat membrane box unit 20, and use the walking component 23 to move the faulty drawer-type flat membrane box unit 20 horizontally to the right out of the tower body 10; then push the spare drawer-type flat membrane box unit 20 into the tower, and guide it to position it by the positioning wedge block 27.

[0073] S4: Lock the membrane box unit sealing assembly, reset the louvered fluid control assembly 50 to the operating mode, and reopen the spray control valve 43.

[0074] In steps S2-S4 above, the intelligent feedback control system automatically increases the spray flow rate controlled by the spray control valve 43 of the other operating levels based on the real-time data of the gas concentration detector 61, in order to compensate for the loss of mass transfer efficiency caused by the shutdown of the faulty level.

[0075] Application Example 1

[0076] This application example is a natural gas boiler tail gas desulfurization technical renovation project in a chemical industrial park, which aims to verify the actual operating performance and online maintenance advantages of the device described in this invention in an industrial environment.

[0077] 1. Design parameters and device configuration:

[0078] Flue gas volume treated: 45000 Nm 3 / h;

[0079] Absorbent: 5% Na2CO3 aqueous solution;

[0080] Inlet SO2 concentration: 1200 mg / Nm³;

[0081] Emission standard: <30mg / Nm 3 ;

[0082] Tower internal configuration: The modular quick-release absorption tower described in Embodiment 1 of this invention is configured with a 3-layer drawer-type flat membrane box unit;

[0083] Flat sheet membrane parameters: Effective membrane area per layer: 400m² 2 The material is a 316L stainless steel plate with a micro-textured surface to enhance the adhesion of the liquid film.

[0084] 2. Comparison device:

[0085] The comparative example uses a traditional plate absorption tower before modification, with the same tower diameter as in this embodiment, and three layers of fixed sieve plates installed inside, with the same layer spacing as in this embodiment.

[0086] 3. Performance Comparison:

[0087] The device operated continuously for 3 months, during which one online maintenance operation was simulated. The average operating data of the two groups of equipment are shown in Table 1 below:

[0088] Table 1:

[0089]

[0090] The results in Table 1 demonstrate that this device, through the coordinated operation of "closing the spray first and then intercepting the liquid," precisely cuts off the liquid supply and physically isolates the maintenance workstation, completely resolving the industry pain point of traditional absorption tower maintenance requiring a complete tower shutdown and evacuation. Core components can be repaired and replaced without shutdown, significantly improving the annual operating rate of the device and reducing downtime losses. Particularly during maintenance, the louvered fluid control component successfully blocks the upper layer of liquid from falling, and the intelligent control system, by adjusting the margin, ensures that emissions still meet standards even with one less layer operating. Only two operators are needed to complete the extraction and replacement of a single-layer drawer-type flat membrane box unit within 30 minutes, resolving the conflict between equipment maintenance and production operation in continuous chemical production, and possessing extremely high industrial application value.

[0091] Application Example 2

[0092] This embodiment demonstrates the application effect of the modular quick-release absorption tower described in this invention in treating high-concentration hydrogen sulfide (H2S) tail gas generated during the production of viscose fiber in a chemical fiber plant, and verifies its ability to handle sudden flat sheet membrane fouling without shutting down the plant.

[0093] 1. Application conditions and configuration:

[0094] Source of exhaust gas: tail gas from the pickling section of a chemical fiber plant.

[0095] Inlet H2S concentration: 800 mg / m³ 3 ;

[0096] Gas temperature: 35℃;

[0097] Absorbent: 5% NaOH aqueous solution.

[0098] Device configuration: The modular quick-release absorption tower described in Embodiment 1 of this invention is used, with four vertically arranged drawer-type flat membrane box units. Each layer is equipped with a hydrophilic modified PP membrane element, and the single-layer membrane contact area is 200m². 2 .

[0099] 2. Treatment effect:

[0100] After the device has been running continuously and stably for 72 hours, the test data is as follows:

[0101] H2S concentration at outlet: <3 mg / m³ 3 ;

[0102] Removal efficiency: ≥99.6%;

[0103] Total pressure drop across the tower: 450 Pa.

[0104] 3. Online maintenance and emergency testing:

[0105] On the 30th day of operation, the simulated second-layer drawer-type flat membrane box unit experienced dust blockage in the flow channel due to the failure of the dust removal in the preceding process, and the monitoring system showed an abnormally high pressure drop in this layer.

[0106] S1: System alarm sounds. The operator closes the spray control valve on the second floor and then rotates the handle to adjust the louvered fluid control component above the second floor to maintenance mode. At this time, the first, third, and fourth floors remain operational, and the total air volume handled by the tower is maintained above 75% of the rated load. The outlet H2S concentration fluctuates briefly but does not exceed the standard.

[0107] S2: After the residual alkali solution in the second layer has drained, loosen the quick-locking buckle and pull out the drawer-type flat plate membrane box unit. Observation revealed that although the third and fourth layers were still spraying at full load, there was no leakage in the maintenance space of the second layer. All the liquid falling from the upper layer fell from the side of the drawer-type flat plate membrane box unit on the second layer and was safely drained away through the sealing plate. The operators did not come into contact with any sulfur-containing alkali solution.

[0108] S3: Push the spare clean drawer-type flat membrane box unit into the second work station, automatically center it using the positioning guide wedge, lock the buckle and then open the corresponding external spray control valve.

[0109] From fault detection to full load restoration, the entire process took only 45 minutes. This verifies the extremely high safety and ease of operation and maintenance offered by this invention when handling highly toxic gases, utilizing mechanical isolation and intelligent feedback technology.

[0110] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A modular quick-release absorption tower characterized by, The absorption tower includes a tower body, at least one drawer-type flat membrane box unit arranged along the axial direction of the tower body, a membrane box support assembly for supporting each drawer-type flat membrane box unit, a liquid supply assembly disposed above each drawer-type flat membrane box unit, and a louvered fluid control assembly disposed between the liquid supply assembly and the drawer-type flat membrane box unit; wherein: The drawer-type flat membrane box unit includes a main frame and a flat membrane assembly disposed within the main frame; the flat membrane assembly consists of several vertically arranged flat plates; a walking component is disposed at the bottom of the main frame; The louvered fluid control assembly is used to control the flow or cut-off of the liquid coming from above, and includes several guide vanes and a through-wall drive mechanism for driving the guide vanes to rotate. The membrane box support assembly includes a sealing plate and a track that matches the walking assembly. The sealing plate has through holes corresponding to the flat membrane assembly, and the track is arranged on both sides of the through holes. The sidewalls of the tower are provided with disassembly and assembly ports at positions corresponding to each drawer-type flat membrane box unit.

2. The modular quick-release absorption tower of claim 1, wherein, The guide vanes are V-shaped or arc-shaped structures, each including a first vane and a second vane; The guide vane includes several axisymmetric guide vanes and one non-axisymmetric guide vane located near the disassembly / removal port. The first and second blades of the axisymmetric guide vane are of equal length; The length of the second blade of the non-axisymmetric guide vane is 1 / 4 to 1 / 3 of the length of the first blade.

3. The modular quick-release absorption tower according to claim 2, characterized in that, In operation mode, the axisymmetric guide vanes have their openings facing right and are arranged sideways, while the non-axisymmetric guide vanes have their openings facing downward, forming a smooth liquid flow channel. In maintenance mode, the openings of the axisymmetric guide vanes face downwards, and the openings of the non-axisymmetric guide vanes face left; adjacent guide vanes abut against each other, forming a continuous wavy liquid interception shielding layer above the drawer-type flat membrane box unit.

4. The modular quick-release absorption tower according to claim 2, characterized in that, The through-wall drive mechanism includes a linkage rod located inside the tower body for connecting each guide vane, a sealed drive shaft passing through the side wall of the tower body, and a maintenance operation handle disposed on the outer wall of the tower body; the inner end of the sealed drive shaft is connected to the linkage rod, and the outer end is connected to the maintenance operation handle.

5. The modular quick-release absorption tower according to claim 2, characterized in that, The sealing plate is provided with a number of drainage holes, and a one-way drainage valve is provided in each drainage hole.

6. The modular quick-release absorption tower according to claim 2, characterized in that, The front end of the drawer-type flat membrane box unit is provided with a membrane box unit sealing assembly. The membrane box unit sealing assembly includes a front panel body, an operating handle disposed on the outside of the front panel body, and a panel sealing gasket and a positioning guide wedge disposed on the inside of the front panel body. The positioning guide wedge is disposed on the upper and lower sides of the front panel body. The tower body has wedge-shaped mating grooves on the upper and lower sides of the disassembly and assembly port that match the positioning guide wedges, and the tower body has quick-locking buckles on the left and right sides of the disassembly and assembly port.

7. The modular quick-release absorption tower according to claim 1, characterized in that, The absorption tower also includes an intelligent feedback control system, which includes pressure detectors installed on the upper and lower sides of each drawer-type flat membrane box unit to monitor pressure drop changes. The top of the tower body is provided with an air outlet, and the bottom is provided with a liquid tank; The intelligent feedback control system also includes a gas concentration detector located at the gas outlet and a liquid level monitor located at the liquid tank.

8. The modular quick-release absorption tower according to claim 7, characterized in that, The absorption tower also includes a fluid transport and control system, which includes a main supply pipe and several branch supply pipes. Each branch supply pipe is equipped with a corresponding spray control valve. The main supply pipe is connected to the liquid tank and the branch supply pipes, and the branch supply pipes are connected to the supply assembly.

9. An online maintenance method for a modular quick-disassembly absorption tower as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Monitor the voltage drop changes of each drawer-type flat membrane box unit. When the voltage drop of a certain layer is abnormal, it is determined to be a faulty layer. S2: Close the liquid supply assembly corresponding to the drawer-type flat membrane box unit of the faulty layer; Subsequently, the guide vanes above this layer are switched to maintenance mode by the through-wall drive mechanism, so that the guide vanes close to cut off the liquid falling from the upper layer and guide the liquid to flow down from the side of the drawer-type flat membrane box unit and fall into the sealing plate. S3: After the residual liquid in the drawer-type flat plate membrane box unit of the faulty layer has drained, use the walking component to move the faulty drawer-type flat plate membrane box unit horizontally out of the tower; then push the spare drawer-type flat plate membrane box unit into the tower. S4: Reset the louvered fluid control component to the operating mode and restart the fluid supply component.

10. The online maintenance method for the modular quick-release absorption tower according to claim 9, characterized in that, In steps S2-S4, the spray flow rate of the liquid supply components in the remaining operating levels is adjusted to compensate for the loss of mass transfer efficiency caused by the shutdown of the faulty level.

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