An anti-settling device and method for absorbing the bottom of a tower

Abstract

The application discloses an anti-settling device for the bottom of an absorption tower and relates to the technical field of industrial waste gas treatment equipment. The anti-settling device comprises an absorption tower, a conical discharge port, a gas distribution mechanism, a settling bottom plate and a submersible electric telescopic rod. The conical discharge port is communicated with the inner wall at the bottom end of the absorption tower. The gas distribution mechanism is arranged at the joint of the conical discharge port and the absorption tower and comprises an annular pipe, a plurality of vertical pipes, a plurality of spray heads and a connecting pipe. The annular pipe is fixed to the inner wall of the conical discharge port, the plurality of vertical pipes are communicated with the top end of the annular pipe, the top end of each vertical pipe is provided with a spray head, and the connecting pipe is communicated with the bottom end of the annular pipe and connected to an external gas supply system. The settling bottom plate is sleeved with the outer periphery of the plurality of vertical pipes and is attached to the inner wall of the absorption tower. The submersible electric telescopic rod is arranged at the bottom of the absorption tower, the output end is fixedly connected to the bottom end of the settling bottom plate, and the settling bottom plate is driven to reciprocatingly move up and down along the outer periphery of the plurality of vertical pipes. The application cooperates the gas distribution and mechanical stripping to enhance the stripping and resuspension of the attached deposits and improve the suspension stability of the slurry at the bottom of the tower.

Description

Technical Field

[0001] This application relates to the technical field of industrial waste gas treatment equipment, and in particular to an anti-settling device and method for the bottom of an absorption tower. Background Technology

[0002] In industrial processes such as wet desulfurization and waste gas scrubbing, a slurry pool is typically located at the bottom of the absorption tower. Solid products generated from the reaction of pollutants in the flue gas with the slurry, such as gypsum crystals, unreacted absorbent particles, and dust impurities, gradually settle at the bottom of the tower. The conical discharge port area at the bottom of the tower has the lowest flow velocity and is the region with the most severe solid deposition. Long-term accumulation of deposits can lead to blockage of the discharge port, accelerated wear of the slurry circulation pump, and even forced shutdown for cleaning, severely impacting the operational stability and desulfurization efficiency of the absorption tower.

[0003] In existing technologies, to prevent sedimentation at the bottom of the tower, side-entry or top-entry mechanical agitators are typically used to continuously stir the slurry, or fixed gas distribution pipes are installed near the discharge port to utilize rising air bubbles to agitate the slurry. However, the fixed gas distribution pipes are positioned in a fixed location, and the rising path of the air bubbles is concentrated near the pipe opening, resulting in uneven coverage of the central area of ​​the tower bottom and directly above the discharge port. More importantly, while fixed gas distribution can produce a certain suspension effect on solid particles that have not yet settled, it cannot apply effective mechanical stripping force to the sediments already attached to the bottom plate surface and the discharge port area. After long-term operation, the sediment layer on the bottom plate surface of the tower gradually thickens, the gas distribution channels are covered, and the anti-settling effect continuously diminishes.

[0004] Therefore, how to enhance the stripping and resuspension of deposits already attached to the bottom of the absorption tower and improve the suspension stability of the slurry at the bottom of the tower has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This application proposes a device and method for preventing sedimentation at the bottom of an absorption tower, which enhances the stripping and resuspension of deposits already attached to the bottom of the absorption tower and improves the suspension stability of the slurry at the bottom of the tower.

[0006] To achieve the above objectives, this application discloses the following technical solutions:

[0007] In a first aspect, this application provides an anti-settling device for the bottom of an absorption tower, comprising: an absorption tower; a conical discharge port fixedly connected to the inner wall of the bottom end of the absorption tower; an air distribution mechanism disposed at the connection between the conical discharge port and the absorption tower, the air distribution mechanism including an annular pipe, multiple vertical pipes, multiple nozzles and a connecting pipe; the annular pipe fixedly connected to the inner wall of the conical discharge port; multiple vertical pipes fixedly connected to the top end of the annular pipe, each vertical pipe having a nozzle at its top end; the connecting pipe fixedly connected to the bottom end of the annular pipe and configured to connect to an external air supply system; a settling bottom plate movably sleeved on the outer periphery of the multiple vertical pipes, and the outer circumferential wall of the settling bottom plate movably fitting against the inner circumferential wall of the absorption tower; and a submersible electric telescopic rod disposed at the bottom of the absorption tower, its output end fixedly connected to the outer wall of the bottom end of the settling bottom plate, and the submersible electric telescopic rod configured to drive the settling bottom plate to reciprocate up and down along the outer periphery of the multiple vertical pipes.

[0008] In some embodiments, a stirring assembly is also included, the stirring assembly comprising:

[0009] The motor is fixedly installed on the outer wall of the top of the absorption tower;

[0010] The rotating shaft is rotatably connected to the inner wall of the top of the absorption tower, and the top of the rotating shaft is connected to the output end of the motor for transmission.

[0011] Multiple stirring blades are fixed to the outer circumference of the rotating shaft.

[0012] In some embodiments, it also includes an extension chamber one and an extension chamber two, which are simultaneously fixedly connected to the inner wall of the conical discharge port; a submersible electric telescopic rod is fixedly installed on the bottom inner wall of the extension chamber one, and a seal is installed between the submersible electric telescopic rod and the extension chamber one.

[0013] In some embodiments, the connecting tube passes through the extension chamber 2, and a sealing ring 3 is provided between the inner circumferential wall of the extension chamber 2 and the outer circumferential wall of the connecting tube, and the sealing ring 3 is sealed and fitted to the extension chamber 2 and the connecting tube respectively.

[0014] In some embodiments, the annular tube is fixedly connected to the inner wall of the conical discharge port by multiple connecting brackets.

[0015] In some embodiments, multiple vertical tubes are fixedly connected at equal intervals to the top of the annular tube.

[0016] In some embodiments, a plurality of sealing rings 1 are fixedly installed on the inner wall of the top of the settlement base plate, and the plurality of sealing rings 1 are respectively movably sleeved on the outer periphery of a plurality of vertical pipes; a sealing ring 2 is fixedly sleeved on the outer circumference of the settlement base plate.

[0017] In some embodiments, a blocking mechanism is also included, which includes:

[0018] A circular through-groove is installed through the center of the settlement slab.

[0019] A cavity is provided on the inner wall of the settlement slab;

[0020] Multiple fan-shaped baffles are equidistantly interspersed within the cavity.

[0021] In some embodiments, the blocking mechanism further includes:

[0022] Multiple side supports are fixedly connected at equal intervals to the inner circumference of the cavity, and each side support is fixedly connected to the corresponding sector-shaped baffle with a spring.

[0023] Multiple limiting rods are fixedly connected to the outer wall of one side of multiple side supports, and simultaneously move through the corresponding fan-shaped baffles.

[0024] In some embodiments, the blocking mechanism further includes:

[0025] The bottom end of the pivot is rotatably connected to the base;

[0026] The limiting vertical rod is fixedly connected to the bottom outer wall of the base, and one end of multiple fan-shaped baffles is movably attached to the circumferential outer wall of the limiting vertical rod;

[0027] Multiple inclined guide plates are fixedly connected at equal intervals to the outer circumference of the limiting vertical rod, and one end of multiple fan-shaped baffles is movably attached to the outer wall of the multiple inclined guide plates.

[0028] The T-shaped bracket is fixedly connected to the bottom outer wall of the limiting vertical rod, and both ends of the T-shaped bracket are simultaneously fixedly connected to the inner circumference of the conical discharge port.

[0029] As can be seen from the above technical solution, this application expands the coverage area of ​​bubble disturbance by setting the gas distribution mechanism at the connection between the conical feed inlet and the absorption tower, utilizing annular pipes, multiple vertical pipes, and multiple nozzles to form a multi-point rising bubble flow at the bottom of the tower. Simultaneously, the settling plate is movably fitted around the outer periphery of multiple vertical pipes and is driven by a submersible electric telescopic rod to reciprocate up and down along the outer periphery of the vertical pipes. During the reversal process, a mechanical peeling force is applied to the deposits already attached to the surface of the settling plate, and the surrounding slurry is driven to scour the surface of the settling plate and the outer periphery of the vertical pipes, causing the peeled deposits to resuspend in the bubble disturbance zone above. Therefore, the synergistic effect of gas distribution disturbance and mechanical peeling enhances the peeling and resuspension effect of the deposits already attached to the bottom of the absorption tower, improving the suspension stability of the slurry at the bottom of the tower.

[0030] Secondly, this application provides a method for preventing settlement at the bottom of an absorption tower, applicable to any of the aforementioned absorption tower bottom anti-settlement devices, comprising the following steps:

[0031] S1: Gas is supplied to the annular pipe through the connecting pipe. The gas is sprayed vertically upwards from the nozzle through multiple vertical pipes, forming a rising bubble flow at the bottom of the absorption tower.

[0032] S2: Activate the submersible electric telescopic rod, whose output end drives the settling bottom plate to move up and down reciprocally along the outer periphery of multiple vertical pipes, so as to apply mechanical stripping force to the sediment on the settling bottom plate and resuspend the stripped sediment.

[0033] In some embodiments, the submersible electric telescopic rod is intermittently telescopic, with a telescopic cycle of 5 to 60 seconds, a telescopic duration to intermittent duration ratio of 1:1 to 3:1, an upward stroke of the settling bottom plate of 50 to 200 mm, and an outlet air velocity of 5 to 20 m / s.

[0034] In some embodiments, the buoyancy height and reciprocating frequency of the settling bottom plate are controlled by adjusting the air supply pressure and the extension and retraction frequency of the submersible electric telescopic rod.

[0035] In some embodiments, step S3 is also included: during the normal floating process of the settling bottom plate, multiple fan-shaped baffles are always attached to the cylindrical outer wall of the limiting vertical rod under the action of springs, and the circular through groove is sealed to keep the settling bottom plate in a sealed state, intercepting impurities from falling downward into the conical discharge port.

[0036] In some embodiments, step S4 is also included: the submersible electric telescopic rod performs intermittent extension and retraction, wherein when it extends, the sinking base plate floats up and step S2 is executed, and when it retracts, the sinking base plate falls down and step S3 is executed, forming a periodic cycle.

[0037] In some embodiments, step S5 is also included: when the submersible electric telescopic rod drives the sedimentation bottom plate to continue to descend to a low position, the fan-shaped baffle contacts the inclined guide plate, and the inclined guide plate pushes the fan-shaped baffle to overcome the spring force and unfold outward, so that the circular through-slot opens, and the sediment is discharged through the circular through-slot from the conical discharge port.

[0038] Since the method for preventing settlement at the bottom of the absorption tower provided in this application is applicable to the aforementioned device for preventing settlement at the bottom of the absorption tower, it possesses all of its technical effects, which will not be elaborated upon here. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings, all of which fall within the scope of protection of this application. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structure or operation.

[0040] Figure 1This is a schematic diagram of the overall structure of an anti-settlement device at the bottom of an absorption tower, provided in an embodiment of this application.

[0041] Figure 2 This application provides a schematic diagram of the internal structure of an anti-settlement device at the bottom of an absorption tower.

[0042] Figure 3 This is a schematic diagram of the gas distribution mechanism in an anti-settlement device at the bottom of an absorption tower, provided in an embodiment of this application.

[0043] Figure 4 An exploded view of the sealing mechanism and the settling bottom plate in an anti-settlement device at the bottom of an absorption tower, provided in an embodiment of this application;

[0044] Figure 5 This is a partial structural diagram of the sealing mechanism in an anti-settlement device at the bottom of an absorption tower, provided in an embodiment of this application.

[0045] The annotations in the attached figures are explained as follows:

[0046] 1. Motor; 2. Absorption Tower; 3. Extension Chamber 1; 4. Extension Chamber 2; 5. Conical Discharge Port; 6. Gas Distribution Mechanism; 7. Sealing Mechanism; 8. Agitator Blade; 9. Rotating Shaft; 601. Sealing Ring 1; 602. Settling Bottom Plate; 603. Sealing Ring 2; 604. Nozzle; 605. Vertical Pipe; 606. Connecting Frame; 607. Connecting Pipe; 608. Sealing Ring 3; 609. Submersible Electric Telescopic Rod; 610. Annular Pipe; 701. Base Support; 702. Limiting Vertical Rod; 703. T-Shaped Bracket; 704. Cavity; 705. Circular Through-Gate; 706. Fan-Shaped Baffle; 707. Inclined Guide Plate; 708. Spring; 709. Side Support; 710. Limiting Insert Rod. Detailed Implementation

[0047] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0048] To improve the removal and resuspension of deposits attached to the bottom of the absorption tower 2, the first aspect of this application provides an anti-settlement device for the bottom of the absorption tower. See also Figures 1 to 5 The anti-settlement device at the bottom of the absorption tower includes the absorption tower 2, the conical discharge port 5, the gas distribution mechanism 6, the settling bottom plate 602, and the submersible electric telescopic rod 609.

[0049] The absorption tower 2 is a vertical tower structure, its interior used to contain the slurry and carry out gas-liquid reactions. A conical discharge port 5 is fixedly connected to the inner wall of the bottom of the absorption tower 2. The conical discharge port 5 has a cone-shaped structure, wider at the top and narrower at the bottom, used to guide the sediment at the bottom of the tower to collect and be discharged. The connection between the conical discharge port 5 and the absorption tower 2 forms a transition zone at the bottom of the tower, where the flow velocity is low, making it a location where sediment easily adheres and accumulates.

[0050] A gas distribution mechanism 6 is located at the connection between the conical discharge port 5 and the absorption tower 2. Specifically, the gas distribution mechanism 6 includes an annular pipe 610, multiple vertical pipes 605, multiple nozzles 604, and a connecting pipe 607. The annular pipe 610 is disposed on the inner wall of the conical discharge port 5 and extends circumferentially along the conical discharge port 5. The outer periphery of the annular pipe 610 is fixedly connected to the inner wall of the conical discharge port 5 by multiple connecting brackets 606, thereby maintaining a stable position of the annular pipe 610 at the bottom of the tower. Multiple vertical pipes 605 are equidistantly fixedly connected to the top end of the annular pipe 610, and each vertical pipe 605 extends vertically upward. A nozzle 604 is provided at the top end of each vertical pipe 605, and the nozzle 604 communicates with the inner cavity of the vertical pipe 605. The connecting pipe 607 is fixedly connected to the bottom end of the annular pipe 610, and the input end of the connecting pipe 607 is configured to communicate with an external gas supply system.

[0051] An external gas supply system supplies gas to the annular pipe 610 via a connecting pipe 607. The gas is then distributed through the annular pipe 610 to multiple vertical pipes 605, and then sprayed vertically upwards from the nozzles 604 at the top of each vertical pipe 605. Since the multiple vertical pipes 605 are equidistantly arranged along the annular pipe 610, and each nozzle 604 sprays gas upwards, multiple rising bubble flows distributed in a ring shape are formed at the bottom of the absorption tower 2. Compared to a single fixed gas distribution pipe, this multi-point gas distribution structure expands the coverage area of ​​the bubble rising path, ensuring that bubble disturbance is obtained in the central area of ​​the tower bottom and directly above the conical discharge port 5, reducing dead zones in the gas distribution.

[0052] A settling plate 602 is positioned above the gas distribution mechanism 6. The settling plate 602 is movably fitted around the outer periphery of multiple vertical pipes 605, and its outer circumferential wall is movably fitted against the inner circumferential wall of the absorption tower 2. The settling plate 602 can move up and down along the outer periphery of the multiple vertical pipes 605. Multiple sealing rings 601 are fixedly installed on the inner top wall of the settling plate 602. These sealing rings 601 are movably fitted around the outer periphery of the multiple vertical pipes 605, forming a dynamic seal when the settling plate 602 moves relative to the vertical pipes 605, preventing slurry leakage along the gaps around the vertical pipes 605. A second sealing ring 603 is fixedly fitted around the outer circumferential wall of the settling plate 602, movably fitting against the inner circumferential wall of the absorption tower 2, forming a dynamic seal when the settling plate 602 moves relative to the inner wall of the absorption tower 2, preventing slurry leakage along the gaps between the tower walls.

[0053] A submersible electric telescopic rod 609 is installed at the bottom of the absorption tower 2. Specifically, the submersible electric telescopic rod 609 is fixedly installed on the inner wall of the bottom end of the extension chamber 3. The extension chamber 3 is fixedly connected to the inner wall of the conical discharge port 5, providing installation space for the submersible electric telescopic rod 609. A seal is installed between the submersible electric telescopic rod 609 and the extension chamber 3 to prevent slurry from entering the interior of the extension chamber 3. The output end of the submersible electric telescopic rod 609 is fixedly connected to the outer wall of the bottom end of the settling plate 602, and the submersible electric telescopic rod 609 is configured to drive the settling plate 602 to reciprocate up and down along the outer periphery of multiple vertical pipes 605.

[0054] When the output end of the submersible electric telescopic rod 609 extends, the settling plate 602 moves upward along the outer periphery of the vertical pipe 605; when the output end of the submersible electric telescopic rod 609 retracts, the settling plate 602 moves downward along the outer periphery of the vertical pipe 605. During the reversal process of the rising and falling of the settling plate 602, the settling plate 602 applies a mechanical peeling force to the deposits already attached to its upper surface. Because the deposits are subjected to a force opposite to the attachment direction at the moment of reversal, the adhesion between the deposits and the surface of the settling plate 602 is broken. At the same time, the up and down movement of the settling plate 602 causes additional flow in the surrounding slurry, creating a scouring effect on the surface of the settling plate 602 and the outer periphery of the vertical pipe 605. The peeled deposits enter the upper bubble disturbance zone with the slurry. The rising bubble flow in the upper bubble disturbance zone resuspends the peeled deposits and they participate in the reaction inside the tower with the slurry circulation.

[0055] Therefore, the multi-point rising bubble flow provided by the gas distribution mechanism 6 and the reciprocating mechanical stripping effect of the settling bottom plate 602 not only expand the gas distribution coverage area, but also apply an effective stripping force to the attached deposits, thereby improving the stripping and resuspension effect of the attached deposits at the bottom of the absorption tower 2 and improving the suspension stability of the slurry at the bottom of the tower.

[0056] To further improve the overall fluidity of the slurry inside the tower, in some embodiments, the anti-settling device at the bottom of the absorption tower also includes a stirring assembly. The stirring assembly includes a motor 1, a rotating shaft 9, and multiple stirring blades 8. The motor 1 is fixedly installed on the outer wall of the top of the absorption tower 2. The rotating shaft 9 is rotatably connected to the inner wall of the top of the absorption tower 2, and the top of the rotating shaft 9 is drively connected to the output end of the motor 1. Multiple stirring blades 8 are simultaneously fixed to the outer periphery of the rotating shaft 9. The motor 1 drives the rotating shaft 9 to rotate, and the rotating shaft 9 drives the multiple stirring blades 8 to rotate inside the absorption tower 2, performing basic stirring of the slurry inside the tower. The stirring assembly, in conjunction with the reciprocating motion of the bottom gas distribution mechanism 6 and the settling bottom plate 602, keeps the slurry inside the tower in a generally fluid state.

[0057] Considering that both the submersible electric telescopic rod 609 and the connecting pipe 607 need to be connected to the bottom of the absorption tower 2, and that leakage of slurry along the connection point needs to be prevented, the anti-settlement device at the bottom of the absorption tower further includes an extension chamber 3 and an extension chamber 4. Extension chamber 3 and extension chamber 4 are simultaneously fixedly connected to the inner wall of the conical discharge port 5. The submersible electric telescopic rod 609 is fixedly installed on the bottom inner wall of extension chamber 3, and a seal is installed between the submersible electric telescopic rod 609 and extension chamber 3. Extension chamber 3 provides an independent installation space for the submersible electric telescopic rod 609, preventing the telescopic rod from being directly exposed to the slurry. Extension chamber 4 is used to accommodate the connecting pipe 607. The connecting pipe 607 passes through extension chamber 4, and a sealing ring 608 is provided between the inner circumference of extension chamber 4 and the outer circumference of connecting pipe 607, and the sealing ring 608 is sealed and fitted to both extension chamber 4 and connecting pipe 607. Sealing ring 3 608 prevents slurry from leaking along the gap between connecting pipe 607 and extension chamber 2 4.

[0058] To improve the stability of the annular pipe 610 at the bottom of the tower and the uniformity of gas distribution in the circumferential direction of the vertical pipes 605, in one optional embodiment, the annular pipe 610 is fixedly connected to the inner wall of the conical discharge port 5 by multiple connecting brackets 606. The multiple connecting brackets 606 are arranged circumferentially along the annular pipe 610, providing stable support for the annular pipe 610. Multiple vertical pipes 605 are equidistantly fixedly connected to the top of the annular pipe 610. This equidistant arrangement ensures that the nozzles 604 are evenly distributed in the circumferential direction, thereby making the rising bubble flow more uniformly covered in the circumferential direction at the bottom of the tower.

[0059] To prevent slurry leakage along the gap between the outer circumference of the vertical pipe 605 and the tower wall during the reciprocating motion of the settling base plate 602, multiple sealing rings 601 are fixedly installed on the inner wall of the top of the settling base plate 602. These sealing rings 601 are movably fitted onto the outer circumference of the vertical pipes 605. A second sealing ring 603 is fixedly fitted onto the outer circumference of the settling base plate 602. The sealing rings 601 and 603 together constitute a dynamic sealing structure for the settling base plate 602 during its vertical movement, preventing slurry leakage along the gap between the outer circumference of the vertical pipe 605 and the tower wall.

[0060] To address the issue of impurities at the bottom of the tower potentially falling into the conical discharge port 5 and the need to open the channel during discharge, in some embodiments, the anti-settlement device at the bottom of the absorption tower also includes a sealing mechanism 7. The sealing mechanism 7 includes a circular through-slot 705, a cavity 704, and multiple sector-shaped baffles 706. The circular through-slot 705 is disposed through the center of the settling bottom plate 602. The cavity 704 is disposed on the inner wall of the settling bottom plate 602. The multiple sector-shaped baffles 706 are equidistantly and movably inserted into the cavity 704. The sector-shaped baffles 706 can move radially within the cavity 704.

[0061] Based on this, to enable the sector-shaped baffles 706 to automatically assemble and seal the circular through-slots 705 in their natural state, the sealing mechanism 7 also includes multiple side supports 709 and multiple limiting rods 710. The multiple side supports 709 are equidistantly fixed to the inner circumference of the cavity 704, and each side support 709 is fixedly connected to the corresponding sector-shaped baffle 706 with a spring 708. The springs 708 consistently apply a radially inward elastic force to the sector-shaped baffles 706. The multiple limiting rods 710 are respectively fixedly connected to one outer wall of the multiple side supports 709, and simultaneously move through the corresponding sector-shaped baffles 706. The limiting rods 710 provide guidance for the radial movement of the sector-shaped baffles 706.

[0062] To enable the sealing mechanism 7 to automatically open and close according to the position of the settling base plate 602, the sealing mechanism 7 further includes a base support 701, a limiting vertical rod 702, multiple inclined guide plates 707, and a T-shaped bracket 703. The base support 701 is located at the center of the settling base plate 602, and the bottom end of the rotating shaft 9 is rotatably connected to the base support 701. The limiting vertical rod 702 is fixedly connected to the bottom outer wall of the base support 701, and one end of multiple fan-shaped baffles 706 is movably attached to the circumferential outer wall of the limiting vertical rod 702. Multiple inclined guide plates 707 are equidistantly fixedly connected to the circumferential outer wall of the limiting vertical rod 702, and one end of each fan-shaped baffle 706 is movably attached to the outer wall of the multiple inclined guide plates 707. The T-shaped bracket 703 is fixedly connected to the bottom outer wall of the limiting vertical rod 702, and both ends of the T-shaped bracket 703 are simultaneously fixedly connected to the circumferential inner wall of the conical discharge port 5.

[0063] During the normal floating process of the settling plate 602, multiple sector-shaped baffles 706, under the action of springs 708, remain attached to the cylindrical outer wall of the limiting vertical rod 702, sealing the circular through-slot 705 and keeping the settling plate 602 in a sealed state, intercepting impurities from falling downwards into the conical discharge port 5. When the submersible electric telescopic rod 609 drives the settling plate 602 to continuously descend to the low position, one end of the multiple sector-shaped baffles 706 contacts the top inclined surface of the inclined guide plate 707 on the outer periphery of the limiting vertical rod 702. The inclined guide plate 707 pushes the sector-shaped baffles 706 to overcome the force of springs 708 and unfold outwards along the limiting insert rod 710. The circular through-slot 705 is opened, and the sediment falls through the circular through-slot 705, passes through the gap between adjacent limiting insert rods 710, and is discharged from the conical discharge port 5.

[0064] The complete working process of the embodiments of this application is described below.

[0065] In the initial state, the absorption tower 2 is filled with slurry, the settling bottom plate 602 is located in the middle or low position of its stroke, multiple fan-shaped baffles 706 are attached to the outer wall of the limiting vertical rod 702 under the action of spring 708, and the circular through groove 705 is in a blocked state.

[0066] When anti-settlement operation is required, the external gas supply system supplies gas to the annular pipe 610 through the connecting pipe 607. The gas is distributed to multiple vertical pipes 605 through the annular pipe 610, and then sprayed vertically upwards from the nozzles 604 at the top of each vertical pipe 605. Since the multiple vertical pipes 605 are equidistantly arranged along the annular pipe 610, the gas forms multiple rising bubble flows distributed in a ring at the bottom of the absorption tower 2. The rising bubble flows drive the solid-liquid mixture at the bottom of the tower to generate a turbulent flow field, keeping the solid particles in a suspended state.

[0067] Simultaneously, the submersible electric telescopic mast 609 is activated. The output end of the submersible electric telescopic mast 609 drives the settling plate 602 to reciprocate up and down along the outer periphery of multiple vertical pipes 605. When the output end of the submersible electric telescopic mast 609 extends, the settling plate 602 moves upward along the outer periphery of the vertical pipes 605; when the output end of the submersible electric telescopic mast 609 retracts, the settling plate 602 moves downward along the outer periphery of the vertical pipes 605. During the reversal process of the settling plate 602's ascent and descent, the settling plate 602 applies a mechanical peeling force to the sediments already attached to its upper surface. At the instant of reversal, the sediments are subjected to a force opposite to the direction of attachment, disrupting the adhesion between the sediments and the surface of the settling plate 602. Simultaneously, the up-and-down movement of the settling plate 602 causes additional flow of the surrounding slurry, creating a scouring effect on the surface of the settling plate 602 and the outer periphery of the vertical pipes 605. The stripped sediments enter the upper bubble disturbance zone with the slurry and are resuspended under the action of the rising bubble flow.

[0068] During the normal floating process of the settling bottom plate 602, multiple fan-shaped baffles 706 are always attached to the cylindrical outer wall of the limiting vertical rod 702 under the action of spring 708, and are combined to seal the circular through groove 705, so that the settling bottom plate 602 remains sealed and impurities are intercepted from falling into the conical discharge port 5.

[0069] When discharge is required, the submersible electric telescopic rod 609 drives the settling plate 602 to descend continuously to its lowest position. At this time, one end of multiple fan-shaped baffles 706 contacts the top inclined surface of the inclined guide plate 707 on the outer periphery of the limiting vertical rod 702. As the settling plate 602 continues to descend, the inclined guide plate 707 pushes the fan-shaped baffles 706 to overcome the force of the spring 708 and unfold outward along the limiting insert rod 710. The circular through-slot 705 is opened, and the sediment falls through the circular through-slot 705, passes through the gap between adjacent limiting insert rods 710, and is discharged from the conical discharge port 5.

[0070] After discharge, the submersible electric telescopic rod 609 drives the settling base plate 602 to rise and reset. Under the action of the spring 708, the sector-shaped baffle 706 moves radially inward along the limiting rod 710, re-attaching to the cylindrical outer wall of the limiting vertical rod 702, thus sealing the circular through-slot 705. This completes one working cycle, and the system waits for the next trigger signal.

[0071] To improve the removal and resuspension of deposits attached to the bottom of the absorption tower 2, a second aspect of this application provides a method for preventing sedimentation at the bottom of the absorption tower, applied to the aforementioned anti-settlement device at the bottom of the absorption tower. This method includes the following steps:

[0072] S1: Gas is supplied to the annular pipe 610 through the connecting pipe 607. The gas is sprayed vertically upward from the nozzle 604 through multiple vertical pipes 605, forming an upward bubble flow at the bottom of the absorption tower 2.

[0073] Specifically, the external gas supply system supplies gas to the annular pipe 610 via the connecting pipe 607. The gas is then distributed through the annular pipe 610 to multiple vertical pipes 605, and then sprayed vertically upwards from the nozzles 604 at the top of each vertical pipe 605. Since the multiple vertical pipes 605 are equidistantly arranged along the annular pipe 610, the gas forms multiple rising bubble flows distributed in a ring at the bottom of the absorption tower 2. These rising bubble flows create a turbulent flow field in the solid-liquid mixture at the bottom of the tower, keeping the solid particles in suspension.

[0074] S2: Start the submersible electric telescopic rod 609, whose output end drives the settling bottom plate 602 to move up and down reciprocally along the outer periphery of multiple vertical pipes 605, so as to apply mechanical stripping force to the sediment on the settling bottom plate 602 and resuspend the stripped sediment.

[0075] Specifically, when the output end of the submersible electric telescopic rod 609 extends, the settling plate 602 moves upward along the outer periphery of the vertical pipe 605; when the output end of the submersible electric telescopic rod 609 retracts, the settling plate 602 moves downward along the outer periphery of the vertical pipe 605. During the reversal process of the rising and falling of the settling plate 602, the settling plate 602 applies a mechanical peeling force to the sediments already attached to its upper surface. At the moment of reversal, the sediments are subjected to a force opposite to the direction of attachment, and the adhesion between the sediments and the surface of the settling plate 602 is broken. At the same time, the up and down movement of the settling plate 602 causes additional flow in the surrounding slurry, creating a scouring effect on the surface of the settling plate 602 and the outer periphery of the vertical pipe 605. The peeled sediments enter the upper bubble disturbance zone with the slurry and are resuspended under the action of the rising bubble flow.

[0076] In one embodiment, S1 and S2 can be performed simultaneously. That is, while the gas distribution mechanism 6 continuously supplies gas to form an upward bubble flow, the submersible electric telescopic rod 609 continuously drives the settling bottom plate 602 to move up and down reciprocally. Through the synergistic effect of gas distribution disturbance and mechanical stripping, the deposits attached to the bottom of the tower are continuously stripped off and resuspended.

[0077] In some embodiments, the submersible electric telescopic rod 609 extends and retracts intermittently, with an extension cycle of 5–60 seconds and an extension-to-interval ratio of 1:1 to 3:1. The upward stroke of the settling plate 602 is 50–200 mm, and the outlet gas velocity of the nozzle 604 is 5–20 m / s. By coordinating these parameters, periodic pressure pulses and flow field reversals can be generated at the bottom of the tower, breaking the concentration gradient and agglomeration structure of solid particles, further enhancing the stripping and resuspension effects.

[0078] Furthermore, the rising height and reciprocating frequency of the settling plate 602 are controlled by adjusting the air supply pressure and the extension / retraction frequency of the submersible electric telescopic rod 609. For example, when enhanced mechanical stripping is required, the extension / retraction frequency or rising stroke of the submersible electric telescopic rod 609 can be increased; when enhanced bubble agitation is required, the air supply pressure can be increased to improve the outlet air velocity of the nozzle 604. Through the above adjustment methods, operating parameters can be flexibly adjusted according to slurry concentration, solid particle size, and deposition conditions.

[0079] In some embodiments, the method further includes step S3: during the normal floating process of the settling bottom plate 602, multiple fan-shaped baffles 706 are always attached to the cylindrical outer wall of the limiting vertical rod 702 under the action of spring 708, and the circular through groove 705 is sealed to keep the settling bottom plate 602 in a sealed state, and to intercept impurities from falling downward into the conical discharge port 5.

[0080] Specifically, during the normal reciprocating floating process of the settling base plate 602, multiple fan-shaped baffles 706, under the radial inward elastic force of the spring 708, remain in contact with the cylindrical outer wall of the limiting vertical rod 702. The multiple fan-shaped baffles 706 combine to form a circular sealing surface, the center of which is precisely in contact with the cylindrical outer wall of the limiting vertical rod 702, thus sealing the circular through-slot 705. At this time, the settling base plate 602 is in a sealed state, preventing impurities in the slurry above from falling into the conical discharge port 5 through the circular through-slot 705, thereby achieving impurity interception.

[0081] Furthermore, the method also includes step S4: the submersible electric telescopic rod 609 intermittently extends and retracts, wherein when it extends, the sinking bottom plate 602 floats up and step S2 is executed, and when it retracts, the sinking bottom plate 602 falls down and step S3 is executed, forming a periodic cycle.

[0082] Specifically, the submersible electric telescopic rod 609 extends and retracts according to a preset intermittent pattern. When the submersible electric telescopic rod 609 extends, the settling plate 602 floats up, performing the mechanical stripping action in S2; when the submersible electric telescopic rod 609 retracts, the settling plate 602 falls, performing the blocking and interception action in S3. Through the above periodic cycle, periodic pressure pulses and flow field reversals are formed at the bottom of the tower, preventing solid particles from forming a stable deposition layer on the surface of the settling plate 602 and in the area of ​​the conical discharge port 5.

[0083] In this application, the stroke of the submersible electric telescopic rod 609 includes a highest position, an intermediate sealing position, and a lowest discharge position. During normal anti-settling cycles, the submersible electric telescopic rod 609 intermittently extends and retracts between the highest position and the intermediate sealing position: when extended, the settling base plate 602 floats to the highest position, performing the mechanical peeling action in S2; when retracted, the settling base plate 602 falls to the intermediate sealing position, performing the blocking and interception action in S3. At this time, the settling base plate 602 does not descend to the lowest discharge position, and the circular through-slot 705 remains in a sealed state. Only when discharge is required does the submersible electric telescopic rod 609 continue to retract from the intermediate sealing position, driving the settling base plate 602 to continuously descend to the lowest discharge position, so as to open the circular through-slot 705 for discharge.

[0084] Furthermore, the method also includes step S5: when the submersible electric telescopic rod 609 drives the sedimentation bottom plate 602 to continue to descend to a low position, the fan-shaped baffle 706 contacts the inclined guide plate 707, and the inclined guide plate 707 pushes the fan-shaped baffle 706 to overcome the force of the spring 708 and unfold outward, so that the circular through groove 705 opens, and the sediment is discharged from the conical discharge port 5 through the circular through groove 705.

[0085] Specifically, when discharge is required, the submersible electric telescopic rod 609 drives the settling plate 602 to continuously descend to its lowest position. At this time, one end of multiple fan-shaped baffles 706 contacts the top inclined surface of the inclined guide plate 707 on the outer periphery of the limiting vertical rod 702. As the settling plate 602 continues to descend, the inclined surface of the inclined guide plate 707 pushes the fan-shaped baffles 706 to overcome the force of the spring 708 and unfold outward along the limiting insert rod 710. After the multiple fan-shaped baffles 706 unfold outward, the circular through-slot 705 is opened, and the sediment falls through the circular through-slot 705, passes through the gap between adjacent limiting insert rods 710, and is finally discharged through the conical discharge port 5.

[0086] After the material discharge is completed, the submersible electric telescopic rod 609 drives the settling bottom plate 602 to rise and reset. Under the action of the spring 708, the fan-shaped baffle 706 moves radially inward along the limiting rod 710, re-attaches to the cylindrical outer wall of the limiting vertical rod 702, and seals the circular through groove 705, restoring the sealing state.

[0087] In some embodiments, the above method is executed by a controller. The controller is signal-connected to the external air supply system and the submersible electric telescopic rod 609, and is used to control the air supply pressure and extension frequency. Exemplarily, the controller can be a programmable logic controller, a microcontroller, or an industrial control computer. According to a preset program or external input signals, the controller controls the external air supply system to supply air to the connecting pipe 607 at a set pressure, and controls the submersible electric telescopic rod 609 to intermittently extend and retract according to a set cycle and stroke. Through centralized control by the controller, coordinated operation of air distribution disturbance and mechanical stripping can be achieved, and operating parameters can be flexibly adjusted according to actual working conditions.

[0088] In other embodiments, a controller may not be required; instead, operators may manually adjust the air supply pressure and the extension / retraction frequency of the submersible electric telescopic rod 609 based on on-site observation. This application does not specify a particular control method, as long as it can achieve coordination between the air distribution disturbance and the reciprocating motion of the settling base plate 602.

[0089] In the above context, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0090] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0091] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0092] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A device for preventing settlement at the bottom of an absorption tower, characterized in that, include: Absorption tower (2); A conical discharge port (5) is fixedly connected to the inner wall of the bottom end of the absorption tower (2); A gas distribution mechanism (6) is provided at the connection between the conical discharge port (5) and the absorption tower (2). The gas distribution mechanism (6) includes an annular pipe (610), multiple vertical pipes (605), multiple nozzles (604), and a connecting pipe (607). The annular pipe (610) is fixed to the inner wall of the conical discharge port (5). Multiple vertical pipes (605) are fixedly connected to the top end of the annular pipe (610), and each vertical pipe (605) is provided with a nozzle (604) at its top end. The connecting pipe (607) is fixedly connected to the bottom end of the annular pipe (610) and is configured to be connected to an external gas supply system. The settling bottom plate (602) is movably sleeved on the outer periphery of the plurality of vertical pipes (605), and the outer circumferential wall of the settling bottom plate (602) is movably attached to the inner circumferential wall of the absorption tower (2); A submersible electric telescopic rod (609) is installed at the bottom of the absorption tower (2), and its output end is fixedly connected to the bottom outer wall of the settling bottom plate (602). The submersible electric telescopic rod (609) is configured to drive the settling bottom plate (602) to move back and forth along the outer periphery of the plurality of vertical pipes (605).

2. The anti-settlement device at the bottom of the absorption tower as described in claim 1, characterized in that, It also includes a stirring assembly, the stirring assembly comprising: The motor (1) is fixedly installed on the top outer wall of the absorption tower (2); The rotating shaft (9) is rotatably connected to the inner wall of the top of the absorption tower (2), and the top of the rotating shaft (9) is connected to the output end of the motor (1) for transmission. Multiple stirring blades (8) are simultaneously fixed to the outer periphery of the rotating shaft (9).

3. The anti-settlement device at the bottom of the absorption tower as described in claim 1, characterized in that, It also includes an extension chamber one (3) and an extension chamber two (4), the extension chamber one (3) and the extension chamber two (4) being fixedly connected to the inner wall of the conical discharge port (5); the underwater electric telescopic rod (609) is fixedly installed on the bottom inner wall of the extension chamber one (3), and a sealing element is installed between the underwater electric telescopic rod (609) and the extension chamber one (3).

4. The anti-settlement device at the bottom of the absorption tower as described in claim 3, characterized in that, The connecting pipe (607) passes through the extension chamber two (4), and a sealing ring three (608) is provided between the inner circumference of the extension chamber two (4) and the outer circumference of the connecting pipe (607), and the sealing ring three (608) is sealed and fitted to the extension chamber two (4) and the connecting pipe (607) respectively.

5. The anti-settlement device at the bottom of the absorption tower as described in claim 1, characterized in that, The annular tube (610) is fixedly connected to the inner wall of the conical discharge port (5) by multiple connecting brackets (606).

6. The anti-settlement device at the bottom of the absorption tower as described in claim 1, characterized in that, Multiple vertical tubes (605) are fixedly connected at equal intervals to the top end of the annular tube (610).

7. The anti-settlement device at the bottom of the absorption tower as described in claim 1, characterized in that, The top inner wall of the settling base plate (602) is fixedly equipped with a plurality of sealing rings (601), and the plurality of sealing rings (601) are respectively movably sleeved on the outer periphery of the plurality of vertical pipes (605); the outer circumferential wall of the settling base plate (602) is fixedly sleeved with sealing rings (603).

8. The anti-settlement device at the bottom of the absorption tower as described in claim 2, characterized in that, It also includes a blocking mechanism (7), which includes: A circular through-groove (705) is provided through the center of the settlement base plate (602); A cavity (704) is provided on the inner wall of the settling bottom plate (602); Multiple fan-shaped baffles (706) are equidistantly inserted into the cavity (704).

9. The anti-settlement device at the bottom of the absorption tower as described in claim 8, characterized in that, The blocking mechanism (7) also includes: Multiple side supports (709) are fixedly connected at equal intervals to the inner circumference of the cavity (704), and each side support (709) is fixedly connected to the corresponding sector baffle (706) with a spring (708). Multiple limiting rods (710) are fixedly connected to one side outer wall of multiple side supports (709) respectively, and simultaneously move through the corresponding fan-shaped baffles (706).

10. The anti-settlement device at the bottom of the absorption tower as described in claim 9, characterized in that, The blocking mechanism (7) also includes: The bottom end of the rotating shaft (9) is rotatably connected to the bottom support (701); The limiting vertical rod (702) is fixedly connected to the bottom outer wall of the base (701), and one end of each of the multiple fan-shaped baffles (706) is movably attached to the circumferential outer wall of the limiting vertical rod (702). Multiple inclined guide plates (707) are fixedly connected at equal intervals to the outer circumference of the limiting vertical rod (702), and one end of each of the multiple fan-shaped baffles (706) is movably attached to the outer wall of the multiple inclined guide plates (707); The T-shaped bracket (703) is fixedly connected to the bottom outer wall of the limiting vertical rod (702), and both ends of the T-shaped bracket (703) are simultaneously fixedly connected to the inner circumferential wall of the conical discharge port (5).

11. A method for preventing settlement at the bottom of an absorption tower, characterized in that, The anti-settlement device applied to the bottom of the absorption tower as described in any one of claims 1 to 10 includes the following steps: S1: Gas is supplied to the annular pipe (610) through the connecting pipe (607), and the gas is sprayed vertically upward through the nozzle (604) through multiple vertical pipes (605) to form an upward bubble flow at the bottom of the absorption tower (2); S2: Activate the submersible electric telescopic rod (609), whose output end drives the settling bottom plate (602) to move up and down along the outer periphery of the plurality of vertical pipes (605) to apply mechanical peeling force to the sediment on the settling bottom plate (602) and to resuspend the peeled sediment.

12. The method for preventing settlement at the bottom of the absorption tower as described in claim 11, characterized in that, The submersible electric telescopic rod (609) is intermittently telescopic, with a telescopic cycle of 5 to 60 seconds. The ratio of telescopic duration to intermittent duration is 1:1 to 3:

1. The floating stroke of the settling bottom plate (602) is 50 to 200 mm. The outlet air velocity of the nozzle (604) is 5 to 20 m / s.

13. The method for preventing settlement at the bottom of the absorption tower as described in claim 12, characterized in that, The buoyancy height and reciprocating frequency of the settling bottom plate (602) are controlled by adjusting the air supply pressure and the extension and retraction frequency of the submersible electric telescopic rod (609).

14. The method for preventing settlement at the bottom of the absorption tower as described in claim 12, characterized in that, The anti-settlement device applied to the bottom of the absorption tower as described in any one of claims 8 to 10 further includes step S3: during the normal floating process of the settling bottom plate (602), the plurality of the fan-shaped baffles (706) are always attached to the cylindrical outer wall of the limiting vertical rod (702) under the action of the spring (708), and the circular through groove (705) is sealed to keep the settling bottom plate (602) sealed and to intercept impurities falling downward into the conical discharge port (5).

15. The method for preventing settlement at the bottom of the absorption tower as described in claim 14, characterized in that, It also includes step S4: the underwater electric telescopic rod (609) performs intermittent extension and retraction, wherein when it extends, the settling bottom plate (602) floats up and step S2 is executed, and when it retracts, the settling bottom plate (602) falls down and step S3 is executed, forming a periodic cycle.

16. The method for preventing settlement at the bottom of the absorption tower as described in claim 15, characterized in that, The process also includes step S5: when the submersible electric telescopic rod (609) drives the sedimentation bottom plate (602) to continuously descend to a low position, the fan-shaped baffle (706) contacts the inclined guide plate (707), and the inclined guide plate (707) pushes the fan-shaped baffle (706) to overcome the force of the spring (708) and unfold outward, so that the circular through-slot (705) opens, and the sediment is discharged from the conical discharge port (5) through the circular through-slot (705).

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