Activated carbon recovery equipment and activated carbon recovery method

Abstract

The invention relates to the field of special tools for nuclear power, in particular to activated carbon recovery equipment and an activated carbon recovery method. According to the activated carbon recycling equipment, the material collecting part is provided with the material collecting cavity, the lower end of the material collecting part is provided with the discharging port, one end of the feeding pipe can be inserted into activated carbon in an activated carbon bed, when the air suction part is started, negative pressure can be generated in the material collecting cavity, and the activated carbon can be sucked into the material collecting cavity through the feeding pipe; after the materials are sucked for a period of time, communication between the material collecting cavity and an air suction port of the air suction part is switched into communication between the atmosphere and the air suction port of the air suction part, and at the moment, the opening and closing part is operated to discharge the activated carbon; and material suction and material falling can be alternately carried out without stopping the air suction piece, so that the activated carbon suction efficiency is greatly improved. According to the activated carbon recovery method provided by the invention, the fluency of absorbing the activated carbon is improved, and the efficiency of absorbing the activated carbon is improved.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power special tools, and in particular to activated carbon recovery equipment and an activated carbon recovery method. Background Art

[0002] The activated carbon delay treatment unit for waste gas in nuclear power plant radioactive gas waste treatment systems consists of a continuous U-shaped activated carbon bed filled with specialized activated carbon. The bed comprises a delay bed and a guard bed. As the waste gas passes through the activated carbon bed, the radioactive inert gases in the waste gas are adsorbed by the activated carbon, where they are delayed and decayed until they meet emission requirements. Excessive humidity in the waste gas or improper operation can lead to excessive moisture in the activated carbon, rendering it incapable of adsorption and necessitating its removal and replacement.

[0003] When replacing activated carbon in an activated carbon bed, the existing technique typically involves opening a discharge port below the bed, allowing the activated carbon to fall by gravity into a material cart for recycling. However, the activated carbon can become severely lumpy due to moisture, resulting in an unsmooth discharge process and requiring temporary stirring, which is inefficient. Therefore, a solution to this problem is urgently needed. Summary of the Invention

[0004] The first object of the present invention is to provide an activated carbon recovery device to solve the problems of poor activated carbon unloading and low unloading efficiency in the prior art.

[0005] The second object of the present invention is to provide an activated carbon recovery method to solve the problems of poor activated carbon unloading and low unloading efficiency in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] An activated carbon recovery device is used to recover activated carbon from an exhaust gas treatment device in a nuclear power plant. The exhaust gas treatment device includes an activated carbon bed. The activated carbon recovery device includes a receiving piece and a feeding pipe. The receiving piece has a receiving cavity and a discharge port at the lower end. One end of the feeding pipe can be inserted into the activated carbon in the activated carbon bed, and the other end is connected to the receiving cavity. The activated carbon recovery device also includes a first three-way valve and an air suction piece. The first port of the first three-way valve is connected to the receiving cavity, and the second port of the first three-way valve is connected to the receiving cavity. Used to communicate with the atmosphere, the third port of the first three-way valve is connected to the suction port of the suction member, and the activated carbon recovery equipment also includes an opening and closing member, which is arranged on the receiving member. The suction of the suction member can form a negative pressure in the receiving chamber to suck the activated carbon on the activated carbon bed into the receiving chamber. The opening and closing member has a receiving state and a discharging state. In the receiving state, the opening and closing member prevents the activated carbon from being discharged from the discharge port, and in the discharging state, the opening and closing member allows the activated carbon to be discharged from the discharge port.

[0008] Optionally, a heating suction nozzle is provided at one end of the feeding tube away from the receiving piece.

[0009] Optionally, a mounting hole is provided at the upper end of the material receiving member, and the first port of the first three-way valve is installed in the mounting hole.

[0010] Optionally, the activated carbon recovery equipment further comprises a first filter element, which is disposed in the material receiving chamber and can prevent the activated carbon from entering the first three-way valve.

[0011] Optionally, a feed port is provided on the side wall of the material receiving component, the feeding pipe is connected to the feed port, and the lowermost end of the first filter component is higher than the center axis of the feed port.

[0012] Optionally, the activated carbon recovery equipment further comprises a back-blowing device, which is arranged at the upper end of the material receiving element, and the air blowing port of the back-blowing device is connected to the material receiving chamber and can blow air toward the first filter element.

[0013] Optionally, the back-blowing device includes a back-blowing pipe and a second three-way valve, one end of the back-blowing pipe is connected to the first port of the second three-way valve, and the other end is connected to the air outlet of the suction member, the second port of the second three-way valve is connected to the air inlet of the back-blowing device, and the third port of the second three-way valve is used to connect to the atmosphere.

[0014] Optionally, the opening and closing member includes an operating part and a movable part that are connected to each other, the operating part is installed on the side wall of the material receiving member, an installation opening is opened on the material receiving member, and the movable part extends from the installation opening into the material receiving cavity, and the operating part can drive the movable part to move so that the outer periphery of the movable part abuts against or detaches from the inner wall of the material receiving cavity. When the outer periphery of the movable part abuts against the inner wall of the material receiving cavity, the opening and closing member is in a material receiving state, and when the outer periphery of the movable part detaches from the inner wall of the material receiving cavity, the opening and closing member is in a material discharging state.

[0015] Optionally, the activated carbon recovery device further includes a second filter element, which is connected between the third port of the first three-way valve and the air intake of the air intake element.

[0016] An activated carbon recovery method, wherein the activated carbon recovery method uses the activated carbon recovery equipment, and the activated carbon recovery method comprises the following steps:

[0017] S1. Insert the feeding pipe into the activated carbon on the activated carbon bed, open the air suction member and switch the opening and closing member to the material receiving state;

[0018] S2. Operate the first three-way valve to connect the first port of the first three-way valve with the third port of the first three-way valve and maintain the connection for a first preset time;

[0019] S3, after the first preset time has expired, the first three-way valve is operated to connect the second port of the first three-way valve with the third port of the first three-way valve, the opening and closing member is switched to the discharge state, and the state is maintained for the second preset time;

[0020] S4, after the second preset time period ends, the backflush device is turned on and maintained for a third preset time period, and after the third preset time period ends, the backflush device is turned off and the opening and closing member is restored to the material receiving state;

[0021] S5. Repeat steps S2 to S4 until all the activated carbon in the activated carbon bed is sucked out.

[0022] Beneficial effects of the present invention:

[0023] The present invention proposes an activated carbon recovery device for recovering activated carbon from the waste gas treatment device of a nuclear power plant, comprising a receiving part and a feeding pipe, the receiving part having a receiving cavity and a discharge port at the lower end, one end of the feeding pipe being capable of being inserted into the activated carbon in the activated carbon bed, and the other end being connected to the receiving cavity, the activated carbon recovery device also comprising a first three-way valve and an air suction part, the first port of the first three-way valve being connected to the receiving cavity, the second port of the first three-way valve being used to be connected to the atmosphere, the third port of the first three-way valve being connected to the air suction port of the air suction part, the activated carbon recovery device also comprising an opening and closing part, the opening and closing part being arranged on the receiving part, the air suction part being able to form a negative pressure in the receiving cavity by suction, so as to suck the activated carbon on the activated carbon bed into the receiving cavity, the opening and closing part having a receiving state and a discharge state, the opening and closing part preventing the activated carbon from being discharged from the discharge port in the receiving state, and the opening and closing part allowing the activated carbon to be discharged from the discharge port in the discharge state. The present invention provides a feeding pipe. When the suction piece is opened, negative pressure will be generated in the receiving chamber, and the activated carbon can be sucked into the receiving chamber through the feeding pipe. When the activated carbon becomes damp and agglomerated, the feeding pipe can still forcibly absorb the activated carbon blocks with the help of negative pressure, thereby improving the smoothness of absorbing the activated carbon. In addition, by providing a first three-way valve, after the feeding pipe has absorbed the material for a period of time, the activated carbon in the receiving chamber will reach a certain height. In order to prevent the activated carbon from clogging the receiving chamber, the connection between the receiving chamber and the suction port of the suction piece can be switched to the connection between the atmosphere and the suction port of the suction piece. At this time, the opening and closing piece can be operated to switch it from the receiving state to the discharging state, and the activated carbon is discharged from the discharge port. That is, by providing the three-way valve, the suction port of the suction piece can be connected to the receiving chamber or to the atmosphere. Therefore, the suction and discharge can be carried out alternately without stopping the suction piece, which greatly improves the efficiency of absorbing activated carbon.

[0024] The present invention proposes an activated carbon recovery method, which adopts activated carbon recovery equipment, wherein a feeding pipe is inserted into the activated carbon on the activated carbon bed, the suction piece is opened to operate the first three-way valve to connect the suction port of the suction piece with the material receiving chamber and maintain the first preset time, a negative pressure is formed in the material receiving chamber, and the activated carbon begins to enter the material receiving chamber. When the first preset time ends, the suction port of the suction piece is connected to the atmosphere by operating the first three-way valve, and the negative pressure in the material receiving chamber gradually disappears. After the first preset time ends, the activated carbon reserve in the material receiving chamber is relatively large. At this time, by switching the opening and closing The part is in the discharging state and maintains the second preset time so that the activated carbon is discharged from the discharge port. At the end of the second preset time, most of the activated carbon has fallen off. At this time, the back-blowing device is turned on and maintained for the third preset time. After the end of the third preset time, the activated carbon remaining on the first filter and the wall of the receiving chamber is blown off. At this time, the back-blowing device can be closed and the opening and closing part can be restored to the receiving state. One material collection and discharge operation is completed, and steps S2 to S4 are repeated. During the process, the suction part can cycle through the collection, discharge and back-blowing operations without stopping, which greatly improves the absorption efficiency of the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the structure of an activated carbon recovery device provided by an embodiment of the present invention;

[0027] Figure 2 This is a structural schematic diagram of an activated carbon recovery device provided by an embodiment of the present invention from another perspective.

[0028] In the picture:

[0029] 100. Activated carbon bed;

[0030] 1. Material receiving part; 2. Material feeding pipe; 3. First three-way valve; 4. Opening and closing part; 5. Air suction part; 6. Heating suction nozzle; 7. First filter element; 8. Second filter element; 9. Back-blowing device; 10. Flexible tube; 20. Brush assembly; 30. Support part; 40. Connecting part; 50. Mobile trolley; 60. Electric control cabinet. DETAILED DESCRIPTION

[0031] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be an element located in the middle.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] This embodiment provides an activated carbon recovery device and an activated carbon recovery method, which are used to solve the problems of poor activated carbon unloading and low unloading efficiency in the prior art.

[0039] like Figure 1-Figure 2 As shown, the activated carbon recovery equipment includes a receiving part 1 and a feeding pipe 2, the receiving part 1 has a receiving cavity and the lower end is open, one end of the feeding pipe 2 can be inserted into the activated carbon in the activated carbon bed 100, and the other end is connected to the receiving cavity, the activated carbon recovery equipment also includes a first three-way valve 3 and an air suction part 5, the first port of the first three-way valve 3 is connected to the receiving cavity, the second port of the first three-way valve 3 is used to connect with the atmosphere, the third port of the first three-way valve 3 is connected to the suction port of the air suction part 5, the activated carbon recovery equipment also includes an opening and closing part 4, the opening and closing part 4 is arranged on the receiving part 1, the air suction part 5 can form a negative pressure in the receiving cavity by suction, so as to suck the activated carbon on the activated carbon bed 100 into the receiving cavity, the opening and closing part 4 has a receiving state and a discharging state, in the receiving state, the opening and closing part 4 prevents the activated carbon from being discharged from the discharge port, and in the discharging state, the opening and closing part 4 allows the activated carbon to be discharged from the discharge port.

[0040] Understandably, after nuclear waste gas passes through the activated carbon bed 100, the radioactive inert gas in the waste gas will be adsorbed by the activated carbon. After a period of adsorption on the activated carbon, the radioactive inert gas will decay, thereby meeting emission requirements. However, when the waste gas humidity is high or the operator misoperates and moisture is present in the activated carbon bed 100, the activated carbon will no longer be able to perform its adsorption function, and the activated carbon needs to be removed from the activated carbon bed 100 and replaced. In the prior art, when replacing the activated carbon in the activated carbon bed 100, the activated carbon is severely agglomerated due to moisture, resulting in an unsmooth unloading process of the activated carbon, requiring temporary stirring by the staff, which is inefficient. The activated carbon recovery equipment proposed in this embodiment is specifically designed for recovering activated carbon from waste gas treatment devices in nuclear power plants. By providing a feed pipe 2, when the air intake member 5 is opened, the first and third ports of the first three-way valve 3 are connected, generating a negative pressure within the receiving chamber. At this point, the opening and closing member 4 is in a receiving state, allowing activated carbon to be drawn through the feed pipe 2 and stored in the receiving chamber. If the activated carbon becomes damp and agglomerated, the feed pipe 2 can still forcibly absorb the activated carbon clumps using the negative pressure, thereby improving the smoothness of activated carbon extraction. Furthermore, due to the provision of the first three-way valve 3, after a period of time of intake by the feed pipe 2, the activated carbon in the receiving chamber will reach a certain level. To prevent the activated carbon from clogging the receiving chamber, the first three-way valve 3 can be operated to switch the connection between the first and third ports of the first three-way valve 3 to the connection between the second and third ports. This means that the connection between the receiving chamber and the air intake port of the air intake member 5 is switched to atmospheric air. Simultaneously, the opening and closing member 4 is switched to a discharging state, allowing the activated carbon to be discharged from the discharge port. That is, by setting a three-way valve, the suction port of the suction component 5 can be connected to the material receiving chamber or to the atmosphere, so the suction and blanking operations can be performed alternately without the need for frequent start and stop of the suction component 5, which greatly improves the efficiency of absorbing activated carbon.

[0041] Optionally, the opening and closing component 4 includes an operating part and a movable part that are connected to each other. The operating part is installed on the side wall of the material receiving component 1. A mounting opening is provided on the material receiving component 1. The movable part extends from the mounting opening into the material receiving cavity. The operating part can drive the movable part to move so that the outer periphery of the movable part abuts against or separates from the inner wall of the material receiving cavity. When the outer periphery of the movable part abuts against the inner wall of the material receiving cavity, the opening and closing component 4 is in a material receiving state. When the outer periphery of the movable part separates from the inner wall of the material receiving cavity, the opening and closing component 4 is in a material discharging state.

[0042] It can be understood that when the outer periphery of the movable portion abuts the inner wall of the receiving chamber, the receiving chamber is blocked by the movable portion, and the activated carbon cannot be discharged from the discharge port. At this time, the opening and closing member 4 is in the receiving state. When the outer periphery of the movable portion is separated from the inner wall of the receiving chamber, the activated carbon can pass through the gap between the movable portion and the inner wall of the receiving chamber and be discharged through the discharge port. At this time, the opening and closing member 4 is in the discharge state. That is, by operating the operating portion, the operating portion can drive the movable portion to move, and the outer periphery of the movable portion abuts or separates from the inner wall of the receiving chamber, thereby switching the opening and closing member 4 between the receiving state and the discharge state. This simple structure and reliable operation improve the reliability of the activated carbon recovery equipment.

[0043] For example, the receiving chamber is cylindrical and the cross section of the movable portion is circular. This arrangement can improve the compatibility between the opening and closing member 4 and the receiving member 1, thereby improving the opening and closing smoothness of the opening and closing member 4 and improving the reliability of the activated carbon recovery equipment.

[0044] For example, the opening and closing member 4 is a CFQ-J pneumatic flap valve. This configuration uses compressed air as its power source, changing the air path direction via a solenoid reversing valve to reciprocate the piston of the pneumatic flap valve cylinder, thereby driving the valve plate to move horizontally or flip, thereby opening or closing the material receiving chamber where the valve plate is located. This provides strong airtightness and enhances the reliability of the opening and closing member 4.

[0045] Of course, in other embodiments, the opening and closing member 4 may also be other types of valves on the market, as long as they are reliable and airtight, and no excessive restrictions are imposed here.

[0046] Optionally, a heating suction nozzle 6 is provided at one end of the feeding tube 2 away from the receiving member 1. It is understandable that the activated carbon is difficult to absorb due to moisture and agglomeration. The heating suction nozzle 6 can heat the activated carbon when absorbing it, thereby reducing the moisture level of the activated carbon and improving the smoothness of the activated carbon absorption.

[0047] For example, the heated suction nozzle 6 includes a nozzle body and a heating wire, which is wound around the nozzle body and connected to a power source via a wire. This arrangement has a simple structure and a reliable heating principle, thereby improving the reliability of the heated suction nozzle 6.

[0048] Optionally, the activated carbon recovery apparatus further includes a first filter element 7, which is disposed in the material receiving chamber and is capable of preventing the activated carbon from entering the first three-way valve 3. It is understood that the first filter element 7 can prevent the activated carbon from entering the air intake element 5 through the first three-way valve 3, thereby preventing the air intake element 5 from becoming stuck. This extends the service life of the air intake element 5 and thereby improves the reliability of the activated carbon recovery apparatus.

[0049] For example, the first filter element 7 is a PE filter. The PE filter includes multiple filter cartridges. The activated carbon is blocked by the mesh in the filter cartridges, and the clean air is discharged through the outlet of the PE filter, thereby improving the filtering performance of the first filter element 7.

[0050] Of course, in other embodiments, the first filter element 7 may also be other types of filters, as long as they can block the activated carbon, and no further restrictions are imposed here.

[0051] For example, the air suction member 5 is a fan or an air pump. This configuration can improve the reliability of the air suction member 5 and improve the economic efficiency of the activated carbon recovery equipment.

[0052] Optionally, a feed port is provided on the side wall of the receiving member 1, the feed pipe 2 is connected to the feed port, and the lowermost end of the first filter element 7 is positioned above the central axis of the feed port. This arrangement allows the airflow discharged from the feed pipe 2 to completely pass through the first filter element 7, thereby improving the filtering effect of the first filter element 7 and reducing the risk of activated carbon entering the air intake member 5.

[0053] Optionally, a mounting hole is formed at the upper end of the receiving member 1, into which the first end of the first three-way valve 3 is mounted. This arrangement minimizes the possibility that activated carbon will enter the first three-way valve 3 due to gravity, preventing impurities from entering the air intake member 5, and improving the reliability of the activated carbon recovery apparatus.

[0054] Optionally, the activated carbon recovery equipment further includes a back-blowing device 9, which is disposed at the upper end of the receiving member 1, and the air outlet of the back-blowing device 9 is connected to the receiving chamber and can blow air toward the first filter element 7. Understandably, when the activated carbon in the receiving chamber reaches a certain storage volume, it is necessary to switch the air intake of the suction member 5 to be connected to the atmosphere, and at the same time switch the opening and closing member 4 to the discharging state, so that the activated carbon is discharged from the discharge port. However, activated carbon powder may remain on the first filter element 7 and the inner wall of the receiving chamber. At this time, the back-blowing device 9 can be opened to blow air toward the first filter element 7, and the activated carbon remaining on the first filter element 7 and the wall of the receiving chamber can be blown down into the material cart below the discharge port.

[0055] For example, the back-blowing device 9 includes a high-pressure gas source and a buffer tank, one end of which is connected to the high-pressure gas source, and the other end of which is connected to the air outlet of the back-blowing device 9. This arrangement can maintain a relatively high pressure of the gas blown out of the air outlet, and can prevent the activated carbon in the material vehicle from being blown up due to excessive pressure, thereby improving the reliability of the back-blowing device 9.

[0056] In other embodiments, the back-blowing device 9 may not be provided with a high-pressure gas source and a buffer tank, but may be provided with a blower or other equipment connected to the air blowing port of the back-blowing device 9, and no excessive restrictions are made here.

[0057] Optionally, an observation hole is provided on the side wall of the receiving member 1, in which a sight glass is installed. This arrangement allows the operator to observe the activated carbon reserve in the receiving chamber, thereby adjusting the suction time and improving the operability of the activated carbon recovery equipment.

[0058] Optionally, the side wall of the receiving member 1 is further provided with a brush hole and a brush assembly 20. The brush assembly 20 comprises an operating rod and a brush. The brush is mounted at one end of the operating rod and extends into the receiving chamber, abutting against the viewing mirror. The operating rod is rotated and disposed in the brush hole. This arrangement allows the brush to wipe the viewing mirror by rotating the operating rod, preventing the viewing mirror from being contaminated with activated carbon and obstructing observation of the receiving chamber, thereby improving the user experience.

[0059] Optionally, the back-blowing device 9 includes a back-blowing pipe and a second three-way valve, one end of the back-blowing pipe is connected to the first port of the second three-way valve, and the other end is connected to the air outlet of the air suction member 5, the second port of the second three-way valve is connected to the air inlet of the back-blowing device 9, and the third port of the second three-way valve is used to connect to the atmosphere. It can be understood that this arrangement can reuse the air discharged by the air suction member 5. When the back-blowing device 9 needs to be operated, the first port of the second three-way valve can be connected to the second port, so that the air discharged by the air suction member 5 is introduced into the material receiving chamber to purge the material receiving chamber. When the back-blowing is completed, the first port of the second three-way valve can be connected to the third port to allow the air to continue to be discharged to the atmosphere, thereby providing a gas source for the back-blowing device 9 without setting up new equipment, thereby improving the economy of the activated carbon recovery equipment.

[0060] To further prevent impurities from entering the air intake member 5, the activated carbon recovery device optionally further includes a second filter element 8, which is connected between the third end of the first three-way valve 3 and the air intake port of the air intake member 5. This arrangement can further filter the gas entering the air intake member 5, preventing impurities not intercepted by the first filter element 7 from entering the air intake member 5 and causing damage to the air intake member 5, thereby extending the service life of the air intake member 5 and improving the reliability of the activated carbon recovery device.

[0061] For example, the second filter element 8 is an air filter. The first filter element 7 can filter activated carbon and most impurities, so the second filter needs to focus on filtering fine impurities in the air. This setting can further improve the filtering ability and extend the service life of the air inlet element 5.

[0062] Optionally, the activated carbon recovery apparatus further includes a flexible tube 10, one end of which is connected to the third port of the first three-way valve 3 and the other end of which is connected to the second filter element 8. This arrangement allows the flexible connection of the flexible tube 10 to eliminate the need for simultaneous position adjustment of other components when the position of the material receiving element 1 needs to be adjusted, thereby improving the operational convenience of the activated carbon recovery apparatus.

[0063] Optionally, the activated carbon recovery equipment further includes a mobile cart 50, on which the second filter and the air intake member 5 are both mounted. The activated carbon recovery equipment further includes a lifting assembly, which includes a support member 30 and a connector 40. The support member 30 extends vertically and is provided with a slide rail along the extension direction. The connector 40 is connected to the material receiving member 1 and is provided with a slider that cooperates with the slide rail. This arrangement enables the activated carbon recovery equipment to have a displacement function, thereby improving its operational flexibility and adaptability to various scenarios. Furthermore, by providing the lifting assembly, the material receiving member 1 can be moved vertically to accommodate material carts of different heights, thereby improving the adaptability and operational reliability of the activated carbon recovery equipment.

[0064] For example, a first roller and a second roller are rotatably provided on the support member 30. The edge of the first roller abuts against the edge of the second roller and can drive the second roller to rotate. The edge of the first roller abuts against one side of the slider. The slider slides in the slide rail to rotate the first roller, thereby driving the second roller to rotate. The second roller is coaxially connected to a ratchet. A pawl is provided on the support member 30. One end of the pawl is rotatably provided on the support member 30, and the other end is engaged with the ratchet. When raising or lowering the material receiving member 1, the pawl can be first rotated to disengage the pawl from the ratchet. Then, the material receiving member 1 can be moved to move the slider in the slide rail, thereby driving the first roller to rotate. The second roller rotates accordingly and drives the ratchet to rotate. When the material receiving member 1 reaches a preset height, the pawl is rotated to engage with the ratchet, thereby locking the material receiving member 1 at the preset height.

[0065] For example, the heating suction nozzle 6 and the suction member 5 are both connected to an electric control cabinet 60, which is connected to a power supply. This arrangement facilitates control of the start and stop of the suction member 5 and the heating suction nozzle 6, thereby improving the operability of the activated carbon recovery equipment.

[0066] For example, the receiving member 1 includes a first portion, a first conical connecting portion, a second portion, and a third portion, which are connected in sequence from top to bottom. The first and second portions are both cylindrical. The first portion is equipped with a first filter element 7, the large end of the conical connecting portion is connected to the first portion, the second portion is equipped with an opening and closing member 4, and the third portion is funnel-shaped and connected to the large end of the second portion. This arrangement gradually reduces the diameter of the first to third portions, making the diameter of the lower end of the receiving member 1 smaller, making it easier to connect with the material vehicle below the discharge port, thereby reducing the generation of smoke and dust. In addition, the first and second portions have larger capacities and can store more activated carbon, which to a certain extent improves the conveying efficiency of the activated carbon recovery equipment.

[0067] An activated carbon recovery method proposed in this embodiment is applied to an activated carbon recovery device, and the activated carbon recovery method comprises the following steps:

[0068] S1. Insert the feeding pipe 2 into the activated carbon on the activated carbon bed 100, and at the same time open the air suction member 5 and switch the opening and closing member 4 to the material receiving state;

[0069] S2. Operate the first three-way valve 3 to connect the first port of the first three-way valve 3 with the third port of the first three-way valve 3 and maintain the connection for a first preset time;

[0070] S3, after the first preset time has expired, the first three-way valve 3 is operated to connect the second port of the first three-way valve 3 with the third port of the first three-way valve 3, the opening and closing member 4 is switched to the discharge state, and the state is maintained for the second preset time;

[0071] S4, after the second preset time period ends, the backflush device 9 is opened and maintained for a third preset time period. After the third preset time period ends, the backflush device 9 is closed and the opening and closing member 4 is restored to the material receiving state;

[0072] S5. Repeat steps S2 to S4 until all the activated carbon in the activated carbon bed (100) is sucked out.

[0073] Understandably, when the activated carbon recovery equipment starts working, the feeding pipe 2 must first be inserted into the activated carbon on the activated carbon bed 100, the suction piece 5 must be opened, and the first three-way valve 3 must be operated to connect the suction port of the suction piece 5 with the receiving chamber and maintained for a first preset time. A negative pressure is formed in the receiving chamber, and the activated carbon begins to enter the suction chamber. When the first preset time is over, the first three-way valve 3 must be operated to connect the suction port of the suction piece 5 with the atmosphere. The negative pressure in the receiving chamber gradually disappears, and after the first preset time is over, the activated carbon reserves in the receiving chamber are relatively large. At this time, the opening and closing piece 4 is switched to the discharging state, and maintained. The second preset time makes the activated carbon fall from the receiving chamber into the material cart below the discharge port. At the end of the second preset time, most of the activated carbon has fallen. At this time, the back-blowing device 9 is opened and maintained for the third preset time. After the end of the third preset time, the activated carbon remaining in the first filter and the wall of the receiving chamber is blown off. At this time, the back-blowing device 9 can be closed and the opening and closing part 4 can be restored to the material receiving state. One suction and discharge operation is completed, and steps S2-step S4 are repeated to continuously complete the suction and discharge operation. During the process, the suction part 5 can cycle the suction and discharge and back-blowing operations without stopping, which greatly improves the activated carbon absorption efficiency.

[0074] Optionally, step S1 further comprises installing a heated suction nozzle 6 to the end of the feeding tube 2 away from the receiving member 1. This setting can heat the activated carbon when absorbing the activated carbon, thereby reducing the moisture content of the activated carbon and improving the smoothness of the activated carbon absorption.

[0075] Optionally, the first preset time is 20s-40s. Under this time, the activated carbon storage in the receiving chamber is moderate, which neither affects the conveying efficiency nor can blockage be avoided.

[0076] Optionally, the second preset time period is 10s-30s, during which most of the activated carbon can fall from the receiving chamber while avoiding slowing down the conveying efficiency.

[0077] Optionally, the third preset time is 3s-7s. During this time, most of the activated carbon on the first filter element 7 and the wall of the receiving chamber can be blown off, taking into account both the backflushing effect and the conveying efficiency.

[0078] It is worth mentioning that the first preset duration, the second preset duration and the third preset duration can be adjusted as needed according to actual conditions, and no excessive restrictions are imposed here.

[0079] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An activated carbon recovery device for recovering activated carbon from a waste gas treatment device of a nuclear power plant, wherein the waste gas treatment device comprises an activated carbon bed (100), characterized in that: The activated carbon recovery device comprises a material receiving member (1) and a feeding pipe (2), wherein the material receiving member (1) has a material receiving chamber and a material discharge port at the lower end, one end of the feeding pipe (2) can be inserted into the activated carbon in the activated carbon bed (100), and the other end is communicated with the material receiving chamber, and the activated carbon recovery device further comprises a first three-way valve (3) and an air suction member (5), wherein the first port of the first three-way valve (3) is communicated with the material receiving chamber, the second port of the first three-way valve (3) is used to communicate with the atmosphere, and the third port of the first three-way valve (3) is connected to the atmosphere. The suction port of the suction member (5) is connected, and the activated carbon recovery equipment further includes an opening and closing member (4), which is arranged on the receiving member (1). The suction of the suction member (5) can form a negative pressure in the receiving chamber to suck the activated carbon on the activated carbon bed (100) into the receiving chamber. The opening and closing member (4) has a receiving state and a discharging state. In the receiving state, the opening and closing member (4) prevents the activated carbon from being discharged from the discharging port, and in the discharging state, the opening and closing member (4) allows the activated carbon to be discharged from the discharging port.

2. The activated carbon recovery equipment according to claim 1, characterized in that: A heating suction nozzle (6) is provided at one end of the feeding tube (2) away from the receiving piece (1).

3. The activated carbon recovery equipment according to claim 1, characterized in that: The upper end of the material receiving member (1) is provided with a mounting hole, and the first port of the first three-way valve (3) is mounted in the mounting hole.

4. The activated carbon recovery equipment according to claim 1, characterized in that: The activated carbon recovery device further comprises a first filter element (7), which is arranged in the material receiving chamber and can prevent the activated carbon from entering the first three-way valve (3).

5. The activated carbon recovery equipment according to claim 4, characterized in that: The side wall of the receiving member (1) is provided with a feed port, the feeding pipe (2) is connected to the feed port, and the lowermost end of the first filter member (7) is higher than the center axis of the feed port.

6. The activated carbon recovery equipment according to claim 4, characterized in that: The activated carbon recovery equipment further comprises a back-blowing device (9), which is arranged at the upper end of the material receiving member (1), and the air blowing port of the back-blowing device (9) is connected to the material receiving chamber and can blow air toward the first filter member (7).

7. The activated carbon recovery equipment according to claim 6, characterized in that: The back-blowing device (9) comprises a back-blowing pipe and a second three-way valve, one end of the back-blowing pipe is connected to the first port of the second three-way valve, and the other end is connected to the air outlet of the air suction member (5), the second port of the second three-way valve is connected to the air inlet of the back-blowing device (9), and the third port of the second three-way valve is used to communicate with the atmosphere.

8. The activated carbon recovery equipment according to claim 1, characterized in that: The opening and closing member (4) includes an operating portion and a movable portion connected to each other, the operating portion is installed on the side wall of the material receiving member (1), the material receiving member (1) is provided with an installation opening, the movable portion extends from the installation opening into the material receiving cavity, the operating portion can drive the movable portion to move so that the outer periphery of the movable portion abuts against or detaches from the inner wall of the material receiving cavity, when the outer periphery of the movable portion abuts against the inner wall of the material receiving cavity, the opening and closing member (4) is in a material receiving state, and when the outer periphery of the movable portion detaches from the inner wall of the material receiving cavity, the opening and closing member (4) is in a material discharging state.

9. The activated carbon recovery equipment according to any one of claims 1 to 8, characterized in that: The activated carbon recovery device further comprises a second filter element (8), wherein the second filter element (8) is connected between the third port of the first three-way valve (3) and the air intake of the air intake element (5).

10. An activated carbon recovery method, characterized in that: The activated carbon recovery method uses the activated carbon recovery equipment according to any one of claims 1 to 9, and the activated carbon recovery method comprises the following steps: S1. Insert the feeding pipe (2) into the activated carbon on the activated carbon bed (100), and simultaneously open the air suction member (5) and switch the opening and closing member (4) to a material receiving state; S2, operating the first three-way valve (3) so that the first port of the first three-way valve (3) is connected to the third port of the first three-way valve (3) and maintaining the connection for a first preset time; S3, when the first preset time period ends, the first three-way valve (3) is operated to connect the second port of the first three-way valve (3) with the third port of the first three-way valve (3), the opening and closing member (4) is switched to the discharge state, and the second preset time period is maintained; S4, after the second preset time period ends, the backflush device (9) is opened and maintained for a third preset time period, and after the third preset time period ends, the backflush device (9) is closed and the opening and closing member (4) is restored to a material receiving state; S5. Repeat steps S2 to S4 until all the activated carbon in the activated carbon bed (100) is sucked out.

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