Activated carbon recovery apparatus and activated carbon recovery method

Abstract

The present application relates to the field of nuclear power special tools, especially to a kind of activated carbon recovery equipment and activated carbon recovery method.The collecting member of a kind of activated carbon recovery equipment proposed in the present application has collecting cavity and lower end has discharge port, one end of feeding pipe can be inserted in activated carbon in activated carbon bed, when suction member is opened, negative pressure will be generated in collecting cavity, activated carbon can be inhaled into collecting cavity by feeding pipe, activated carbon is still able to be dispersed by negative pressure by feeding pipe when activated carbon is damp and caked, so as to improve the fluency of extracting activated carbon, after a period of time of suction, collecting cavity and the suction port of suction member are switched to be connected with atmosphere and the suction port of suction member, at this time, operating opening and closing member makes activated carbon discharge, without stopping suction member, suction and discharging can be alternately carried out, which greatly improves the efficiency of extracting activated carbon.The activated carbon recovery method proposed in the present application improves the fluency of extracting activated carbon and improves the efficiency of extracting activated carbon.

Description

Technical Field

[0001] This invention relates to the field of nuclear power-specific tools, and more particularly to an activated carbon recovery device and a method for activated carbon recovery. Background Technology

[0002] The activated carbon delayed treatment device in the radioactive gas waste treatment system of a nuclear power plant includes a continuous U-shaped activated carbon bed filled with specialized activated carbon. The activated carbon bed comprises a delayed bed and a protective bed. After the waste gas passes through the activated carbon bed, the radioactive inert gases in the waste gas are adsorbed by the activated carbon. The radioactive inert gases are delayed and decay within the activated carbon bed, eventually meeting emission requirements. Excessive humidity in the waste gas or operational errors can lead to excessive moisture content in the activated carbon, rendering it unable to continue its adsorption function. In such cases, the activated carbon must be removed from the activated carbon bed and replaced.

[0003] In existing technologies, when replacing activated carbon in an activated carbon bed, the discharge port at the bottom of the bed is typically opened, allowing the activated carbon to fall into a material cart under gravity for recovery. However, the activated carbon tends to clump together due to moisture, resulting in an uneven discharge process that requires temporary stirring by staff, leading to low efficiency. Therefore, a solution to address these issues is urgently needed. Summary of the Invention

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

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

[0006] Based on the above concept, the technical solution adopted by this invention is as follows:

[0007] An activated carbon recovery device is used to recover activated carbon from a waste gas treatment unit in a nuclear power plant. The waste gas treatment unit includes an activated carbon bed. The activated carbon recovery device includes a receiving component and a feeding pipe. The receiving component has a receiving chamber and a discharge port at its lower end. One end of the feeding pipe can be inserted into the activated carbon in the activated carbon bed, and the other end communicates with the receiving chamber. The activated carbon recovery device also includes a first three-way valve and a suction component. The first port of the first three-way valve communicates with the receiving chamber, and the second port of the first three-way valve communicates with the receiving chamber. For communication with the atmosphere, the third port of the first three-way valve is connected to the air intake of the air intake component. The activated carbon recovery equipment also includes an opening and closing component, which is disposed on the receiving component. The air intake component can create a negative pressure in the receiving chamber to draw the activated carbon on the activated carbon bed into the receiving chamber. The opening and closing component has a receiving state and a discharging state. In the receiving state, the opening and closing component prevents the activated carbon from being discharged from the discharging port. In the discharging state, the opening and closing component allows the activated carbon to be discharged from the discharging port.

[0008] Optionally, a heated suction nozzle is provided at the end of the feeding pipe away from the receiving component.

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

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

[0011] Optionally, the receiving component has a feed inlet on its side wall, the feeding pipe is connected to the feed inlet, and the lowest position of the first filter component is higher than the central axis of the feed inlet.

[0012] Optionally, the activated carbon recovery equipment further includes a backflushing device, which is located at the upper end of the receiving component, and the air outlet of the backflushing device is connected to the receiving chamber and can blow air onto the first filter element.

[0013] Optionally, the backflush device includes a backflush pipe and a second three-way valve. One end of the backflush 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 element. The second port of the second three-way valve is connected to the air inlet of the backflush device, and the third port of the second three-way valve is used to communicate with the atmosphere.

[0014] Optionally, the opening and closing component includes an operating part and a movable part connected to each other. The operating part is installed on the side wall of the receiving component, and the receiving component has an installation port. The movable part extends into the receiving cavity from the installation port. The operating part can drive the movable part to move so that the outer periphery of the movable part abuts against or disengages from the inner wall of the receiving cavity. When the outer periphery of the movable part abuts against the inner wall of the receiving cavity, the opening and closing component is in a material receiving state. When the outer periphery of the movable part disengages from the inner wall of the receiving cavity, the opening and closing component 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 aforementioned activated carbon recovery equipment, and the activated carbon recovery method includes the following steps:

[0017] S1. Insert the feeding pipe into the activated carbon on the activated carbon bed, and at the same time open the air suction device and switch the opening and closing device 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 ends, operate the first three-way valve to connect the second port of the first three-way valve with the third port of the first three-way valve, switch the opening and closing element to the discharge state, and maintain it for the second preset time.

[0020] S4. After the second preset time ends, open the back-blowing device and maintain it for the third preset time. After the third preset time ends, close the back-blowing device and restore the opening and closing parts to the material-bearing state.

[0021] S5. Repeat steps S2-S4 until all the activated carbon in the activated carbon bed is extracted.

[0022] The beneficial effects of this invention are:

[0023] This invention proposes an activated carbon recovery device for recovering activated carbon from waste gas treatment equipment in nuclear power plants. The device includes a receiving component and a feeding pipe. The receiving component has a receiving chamber and a discharge port at its 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 chamber. The activated carbon recovery device also includes a first three-way valve and an air suction component. The first port of the first three-way valve is connected to the receiving chamber, the second port of the first three-way valve is connected to the atmosphere, and the third port of the first three-way valve is connected to the air suction port of the air suction component. The activated carbon recovery device also includes an opening and closing component disposed on the receiving component. The air suction component can create a negative pressure in the receiving chamber to draw the activated carbon from the activated carbon bed into the receiving chamber. The opening and closing component has a receiving state and a discharging state. In the receiving state, the opening and closing component prevents the activated carbon from being discharged from the discharge port; in the discharging state, the opening and closing component allows the activated carbon to be discharged from the discharge port. This invention utilizes a feeding pipe. When the suction unit is activated, a negative pressure is generated in the receiving chamber, allowing activated carbon to be drawn into the receiving chamber through the feeding pipe. Even when the activated carbon becomes damp and clumps, the feeding pipe can still forcefully disperse the activated carbon clumps using the negative pressure, thereby improving the smoothness of activated carbon extraction. Furthermore, by setting a first three-way valve, after the feeding pipe has been absorbing material for a period of time, the activated carbon in the receiving chamber will reach a certain height. To prevent the activated carbon from clogging the receiving chamber, the connection between the receiving chamber and the suction port of the suction unit can be switched to the connection between the atmospheric air and the suction port of the suction unit. At this time, the opening and closing device can be operated to switch it from the receiving state to the discharging state, and the activated carbon is discharged from the discharge port. In other words, by setting a three-way valve, the suction port of the suction unit can be connected to the receiving chamber or to the atmosphere. Therefore, the suction and discharge can be alternated without stopping the suction unit, greatly improving the efficiency of activated carbon extraction.

[0024] This invention proposes an activated carbon recovery method using activated carbon recovery equipment. A feeding pipe is inserted into the activated carbon on the activated carbon bed. The first three-way valve of the suction device is opened to connect the suction port of the suction device with the receiving chamber and maintain this connection for a first preset time. A negative pressure is created in the receiving chamber, and activated carbon begins to enter. When the first preset time ends, the suction port of the suction device is connected to the atmosphere by operating the first three-way valve. The negative pressure in the receiving chamber gradually disappears, and a significant amount of activated carbon remains in the receiving chamber after the first preset time. At this point, the opening and closing mechanisms are switched... The device is in the discharge state and is maintained for a second preset time to allow activated carbon to be discharged from the outlet. After the second preset time ends, most of the activated carbon has fallen off. At this time, the backflushing device is turned on and maintained for a third preset time. After the third preset time ends, the activated carbon remaining in the first filter and the wall of the receiving chamber is blown off. At this time, the backflushing device can be turned off and the opening and closing device can be restored to the receiving state. One material receiving and discharging operation is completed. Repeat steps S2-S4. During the process, the suction device can perform material receiving, discharging and backflushing operations in a cycle without stopping the machine, which greatly improves the absorption efficiency of activated carbon. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an activated carbon recovery device provided in an embodiment of the present invention;

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

[0028] In the picture:

[0029] 100. Activated carbon bed;

[0030] 1. Receiving component; 2. Feeding pipe; 3. First three-way valve; 4. Opening and closing component; 5. Suction component; 6. Heated suction nozzle; 7. First filter component; 8. Second filter component; 9. Backflushing device; 10. Flexible pipe; 20. Brush assembly; 30. Support component; 40. Connecting component; 50. Moving trolley; 60. Electrical control cabinet. Detailed Implementation

[0031] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal 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," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

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

[0038] This embodiment proposes an activated carbon recovery device and method to solve the problems of poor activated carbon discharge and low discharge efficiency in the prior art.

[0039] like Figures 1-2 As shown, the activated carbon recovery equipment includes a receiving component 1 and a feeding pipe 2. The receiving component 1 has a receiving chamber and is open at the bottom. 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 chamber. The activated carbon recovery equipment also includes a first three-way valve 3 and an air suction component 5. The first port of the first three-way valve 3 is connected to the receiving chamber, the second port of the first three-way valve 3 is used to connect to the atmosphere, and the third port of the first three-way valve 3 is connected to the air suction port of the air suction component 5. The activated carbon recovery equipment also includes an opening and closing component 4, which is disposed on the receiving component 1. The air suction component 5 can create a negative pressure in the receiving chamber to draw the activated carbon on the activated carbon bed 100 into the receiving chamber. The opening and closing component 4 has a receiving state and a discharging state. In the receiving state, the opening and closing component 4 prevents the activated carbon from being discharged from the discharge port. In the discharging state, the opening and closing component 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 gases in the waste gas are adsorbed by the activated carbon. After a period of adsorption on the activated carbon, the radioactive inert gases decay, thus meeting emission requirements. However, when the waste gas has high humidity or when operator error causes moisture to be present in the activated carbon bed 100, the activated carbon will be unable to continue its adsorption function, requiring the activated carbon to be removed and replaced. In the existing technology, when replacing the activated carbon in the activated carbon bed 100, the activated carbon clumps due to moisture, resulting in an uneven unloading process that requires temporary stirring by staff, leading to low efficiency. The activated carbon recovery equipment proposed in this embodiment is specifically designed for recovering activated carbon from the exhaust gas treatment devices of nuclear power plants. By setting up a feeding pipe 2, when the suction component 5 is opened, the first and third ports of the first three-way valve 3 are connected, generating negative pressure in the receiving chamber. At this time, the opening and closing component 4 is in the receiving state, allowing activated carbon to be sucked in through the feeding pipe 2 and stored in the receiving chamber. When the activated carbon becomes damp and clumps, the feeding pipe 2 can still use the negative pressure to forcibly disperse the activated carbon clumps, thereby improving the smoothness of activated carbon extraction. Furthermore, by setting up the first three-way valve 3, after the feeding pipe 2 has been sucking material for a period of time, the activated carbon in the receiving chamber will reach a certain height. 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 to the connection between the second and third ports. That is, the connection between the receiving chamber and the suction port of the suction component 5 is switched to the connection between the atmosphere and the suction port of the suction component 5. Simultaneously, the opening and closing component 4 is switched to the discharge state, allowing the activated carbon to be discharged from the discharge port. By setting a three-way valve, the air intake of the air intake component 5 can be connected to the material receiving chamber or to the atmosphere. Therefore, the air intake and discharge operations can be alternated without the air intake component 5 frequently starting and stopping, 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 connected to each other. The operating part is installed on the side wall of the receiving component 1. The receiving component 1 has an installation port. The movable part extends into the receiving cavity from the installation port. The operating part can drive the movable part to move so that the outer periphery of the movable part abuts against or disengages from the inner wall of the receiving cavity. When the outer periphery of the movable part abuts against the inner wall of the receiving cavity, the opening and closing component 4 is in a material receiving state. When the outer periphery of the movable part disengages from the inner wall of the receiving cavity, the opening and closing component 4 is in a material discharging state.

[0042] Understandably, when the outer periphery of the movable part abuts against the inner wall of the receiving chamber, the receiving chamber is blocked by the movable part, and activated carbon cannot be discharged from the outlet. At this time, the opening and closing part 4 is in the receiving state. When the outer periphery of the movable part disengages from the inner wall of the receiving chamber, activated carbon can pass through the gap between the movable part and the inner wall of the receiving chamber and be discharged through the outlet. At this time, the opening and closing part 4 is in the discharging state. That is, by operating the operating part, the operating part can drive the movable part to move, and the outer periphery of the movable part abuts against or disengages from the inner wall of the receiving chamber, thereby switching the receiving state and the discharging state of the opening and closing part 4. The structure is simple and the operation is reliable, which improves the reliability of the activated carbon recovery equipment.

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

[0044] For example, the opening and closing element 4 is a CFQ-J type pneumatic flap valve. This configuration enables the opening and closing element 4 to use compressed air as power, and changes the air path direction through an electromagnetic reversing valve, causing the piston of the pneumatic flap valve cylinder to reciprocate, thereby driving the valve plate to move horizontally or flip, realizing the opening or closing of the receiving chamber where the valve plate is located. It has strong airtightness and improves the reliability of the opening and closing element 4.

[0045] Of course, in other embodiments, the opening and closing element 4 can also be other types of valves available on the market, as long as they are reliable and airtight. No further restrictions are imposed here.

[0046] Optionally, a heated suction nozzle 6 is provided at the end of the feeding pipe 2 away from the receiving part 1. Understandably, activated carbon is difficult to absorb when it is damp and clumps together. The heated suction nozzle 6 can heat the activated carbon during the absorption process, thereby reducing the moisture content of the activated carbon and improving the absorption smoothness of the activated carbon.

[0047] For example, the heated suction nozzle 6 includes a nozzle body and a heating wire. The heating wire is wound around the outer periphery of the nozzle body and connected to a power source via a wire. This configuration is simple in structure and has a reliable heating principle, thus improving the reliability of the heated suction nozzle 6.

[0048] Optionally, the activated carbon recovery equipment also includes a first filter element 7, which is disposed in the receiving chamber and prevents activated carbon from entering the first three-way valve 3. Understandably, the first filter element 7 can prevent activated carbon from entering the suction element 5 through the first three-way valve 3, causing the suction element 5 to jam, thus extending the service life of the suction element 5 and improving the reliability of the activated carbon recovery equipment.

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

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

[0051] For example, the suction component 5 is a fan or air pump. This arrangement can improve the reliability of the suction component 5 and enhance the economics of the activated carbon recovery equipment.

[0052] Optionally, the receiving component 1 has a feed inlet on its side wall, and the feeding pipe 2 is connected to the feed inlet. The lowest point of the first filter element 7 is higher than the central axis of the feed inlet. This arrangement allows the airflow discharged from the feeding pipe 2 to completely pass through the first filter element 7, thereby improving the filtration effect of the first filter element 7 and reducing the risk of activated carbon entering the intake component 5.

[0053] Optionally, the receiving component 1 has a mounting hole at its upper end, and the first end of the first three-way valve 3 is installed in the mounting hole. This arrangement can minimize the chance of activated carbon entering the first three-way valve 3 due to gravity, prevent impurities from entering the suction component 5, and improve the reliability of the activated carbon recovery equipment.

[0054] Optionally, the activated carbon recovery equipment also includes a backflushing device 9, which is located at the upper end of the receiving component 1. The air outlet of the backflushing device 9 is connected to the receiving chamber and can blow air onto the first filter element 7. Understandably, when the activated carbon in the receiving chamber reaches a certain storage amount, the air inlet of the suction component 5 needs to be switched to be connected to the atmosphere, and the opening and closing component 4 needs to be switched to the discharge state to allow the activated carbon to be 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 backflushing device 9 can be opened to blow air onto the first filter element 7, blowing the activated carbon remaining on the first filter element 7 and the wall of the receiving chamber into the material cart below the discharge port.

[0055] For example, the backflushing device 9 includes a high-pressure air source and a buffer tank. One end of the buffer tank is connected to the high-pressure air source, and the other end is connected to the air outlet of the backflushing device 9. This configuration enables the gas blown out of the air outlet to maintain a high pressure and prevents the activated carbon in the material cart from being blown away by excessive pressure, thereby improving the reliability of the backflushing device 9.

[0056] In other embodiments, the backflush device 9 may not be equipped with a high-pressure air source and a buffer tank, but instead may be equipped with a fan or other equipment connected to the air outlet of the backflush device 9. No further restrictions are imposed here.

[0057] Optionally, an observation hole with a sight glass is also provided on the side wall of the receiving component 1. This feature allows operators to easily observe the amount of activated carbon stored in the receiving chamber, thereby adjusting the feeding time and improving the operability of the activated carbon recovery equipment.

[0058] Optionally, the side wall of the receiving component 1 is also provided with a brush hole and a brush assembly 20. The brush assembly 20 includes an operating rod and a brush. The brush is installed at one end of the operating rod and extends into the receiving cavity to fit against the sight glass. The operating rod is rotatably positioned in the brush hole. This arrangement allows the brush to wipe the sight glass by rotating the operating rod, preventing activated carbon from adhering to the sight glass and thus preventing the inability to observe the situation inside the receiving cavity, thereby improving the user experience.

[0059] Optionally, the backflushing device 9 includes a backflushing pipe and a second three-way valve. One end of the backflushing 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 component 5. The second port of the second three-way valve is connected to the air inlet of the backflushing device 9, and the third port of the second three-way valve is used to connect to the atmosphere. Understandably, this arrangement allows for the reuse of the air discharged from the suction component 5. When the backflushing device 9 needs to operate, the first port and the second port of the second three-way valve can be connected to introduce the air discharged from the suction component 5 into the receiving chamber for purging. When backflushing ends, connecting the first port and the third port of the second three-way valve allows the air to continue to be discharged to the atmosphere. This eliminates the need for new equipment to provide a gas source for the backflushing device 9, improving the economic efficiency of the activated carbon recovery equipment.

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

[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 filtration capacity and extend the service life of the intake element 5.

[0062] Optionally, the activated carbon recovery equipment also 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 is connected to the second filter element 8. This design allows for position adjustments to the receiving element 1 without the need for simultaneous adjustments to other components, thus improving the operational convenience of the activated carbon recovery equipment.

[0063] Optionally, the activated carbon recovery equipment also includes a mobile trolley 50, on which the second filter and the suction component 5 are mounted. The activated carbon recovery equipment also includes a lifting assembly, which comprises a support member 30 and a connector 40. The support member 30 extends vertically and is equipped with a slide rail along its extension direction. The connector 40 is connected to the receiving component 1 and is equipped with a slider, which cooperates with the slide rail. This configuration enables the activated carbon recovery equipment to have a displacement function, thereby improving its operational flexibility and adaptability to different scenarios. Furthermore, by setting the lifting assembly, the receiving component 1 can move vertically to accommodate material carts of different heights, improving the adaptability and reliability of the activated carbon recovery equipment.

[0064] For example, a first roller and a second roller are rotatably mounted 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, which can cause the first roller to rotate, thereby driving the second roller to rotate. A ratchet is coaxially connected to the second roller. A pawl is provided on the support member 30. One end of the pawl is rotatably mounted on the support member 30, and the other end is engaged with the ratchet. When raising and lowering the receiving member 1, the pawl can be rotated first to disengage the pawl from the ratchet. Then, the receiving member 1 is moved so that the slider moves in the slide rail, thereby driving the first roller to rotate. The second roller rotates accordingly and drives the ratchet to rotate. When the receiving member 1 reaches a preset height, the pawl is rotated to engage with the ratchet, thereby locking the receiving member 1 at the preset height.

[0065] For example, both the heated suction nozzle 6 and the air intake component 5 are connected to the electrical control cabinet 60, which is connected to a power source. This arrangement facilitates the control of the start and stop of the air intake component 5 and the heated suction nozzle 6, improving the operability of the activated carbon recovery equipment.

[0066] For example, the receiving component 1 includes a first part, a first conical connecting part, a second part, and a third part connected sequentially from top to bottom. Both the first and second parts are cylindrical. A first filter element 7 is installed inside the first part. The large end of the conical connecting part is connected to the first part. The second part is equipped with an opening and closing element 4. The third part is funnel-shaped and its large end is connected to the second part. This arrangement causes the diameter of the first to third parts to gradually decrease, resulting in a smaller diameter at the lower end of the receiving component 1, making it easier to connect with the material cart below the discharge port, thereby reducing dust generation. Furthermore, the first and second parts have larger capacities, allowing for the storage of more activated carbon, which improves the conveying efficiency of the activated carbon recovery equipment to some extent.

[0067] This embodiment proposes an activated carbon recovery method applied to activated carbon recovery equipment. The activated carbon recovery method includes 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 suction device 5 and switch the opening and closing device 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 ends, operate the first three-way valve 3 to connect the second port of the first three-way valve 3 with the third port of the first three-way valve 3, switch the opening and closing element 4 to the discharge state, and maintain the second preset time.

[0071] S4. After the second preset time ends, open the back-blowing device 9 and maintain it for the third preset time. After the third preset time ends, close the back-blowing device 9 and restore the opening and closing part 4 to the material-bearing state.

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

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

[0074] Optionally, step S1 further includes installing the heated suction nozzle 6 to the end of the feeding pipe 2 away from the receiving member 1. This arrangement can heat the activated carbon during suction, thereby reducing the moisture content of the activated carbon and improving the suction smoothness of the activated carbon.

[0075] Optionally, the first preset duration is 20s-40s. Within this duration, the amount of activated carbon stored in the receiving chamber is moderate, which neither affects the conveying efficiency nor prevents blockage.

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

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

[0078] It is worth mentioning that the first, second, and third preset durations can be adjusted as needed according to actual circumstances, without too many restrictions.

[0079] Note that the above description is merely a preferred embodiment 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 various obvious changes, readjustments, and substitutions can be made 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 which 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 unit in a nuclear power plant, the waste gas treatment unit comprising an activated carbon bed (100), characterized in that, The activated carbon recovery equipment includes a receiving component (1) and a feeding pipe (2). The receiving component (1) has a receiving chamber and a discharge port at its 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 connected to the receiving chamber. The activated carbon recovery equipment also includes a first three-way valve (3) and an air suction component (5). The first port of the first three-way valve (3) is connected to the receiving chamber, the second port of the first three-way valve (3) is used to connect to the atmosphere, and the third port of the first three-way valve (3) is connected to the atmosphere. The suction port of the suction component (5) is connected. The activated carbon recovery equipment also includes an opening and closing component (4). The opening and closing component (4) is disposed on the receiving component (1). The suction of the suction component (5) can create a negative pressure in the receiving chamber to draw the activated carbon on the activated carbon bed (100) into the receiving chamber. The opening and closing component (4) has a receiving state and a discharging state. In the receiving state, the opening and closing component (4) prevents the activated carbon from being discharged from the discharging port. In the discharging state, the opening and closing component (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 heated suction nozzle (6) is provided at the end of the feeding pipe (2) away from the receiving component (1).

3. The activated carbon recovery equipment according to claim 1, characterized in that, The receiving component (1) has an installation hole at its upper end, and the first port of the first three-way valve (3) is installed in the installation hole.

4. The activated carbon recovery equipment according to claim 1, characterized in that, The activated carbon recovery device further includes a first filter element (7), which is disposed in the 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 receiving component (1) has a feed inlet on its side wall, the feeding pipe (2) is connected to the feed inlet, and the lowest position of the first filter (7) is higher than the central axis of the feed inlet.

6. The activated carbon recovery equipment according to claim 4, characterized in that, The activated carbon recovery equipment also includes a backflushing device (9), which is located on the upper end of the receiving component (1), and the air blowing port of the backflushing device (9) is connected to the receiving chamber and can blow air to the first filter (7).

7. The activated carbon recovery equipment according to claim 6, characterized in that, The backflush device (9) includes a backflush pipe and a second three-way valve. One end of the backflush 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 component (5). The second port of the second three-way valve is connected to the air inlet of the backflush 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 component (4) includes an operating part and a movable part connected to each other. The operating part is installed on the side wall of the receiving component (1). The receiving component (1) has an installation port. The movable part extends into the receiving cavity from the installation port. The operating part can drive the movable part to move so that the outer periphery of the movable part abuts against or disengages from the inner wall of the receiving cavity. When the outer periphery of the movable part abuts against the inner wall of the receiving cavity, the opening and closing component (4) is in a material receiving state. When the outer periphery of the movable part disengages from the inner wall of the receiving cavity, the opening and closing component (4) is in a material discharging state.

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

10. A method for recovering activated carbon, characterized in that, The activated carbon recovery method uses the activated carbon recovery equipment as described in any one of claims 1-9, and the activated carbon recovery method includes the following steps: 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 device (5) and switch the opening and closing device (4) to the material receiving state; 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. S3. After the first preset time ends, operate the first three-way valve (3) to connect the second port of the first three-way valve (3) with the third port of the first three-way valve (3), switch the opening and closing element (4) to the discharge state, and maintain the second preset time. S4. After the second preset time ends, open the back-blowing device (9) and maintain it for the third preset time. After the third preset time ends, close the back-blowing device (9) and restore the opening and closing part (4) to the material-bearing state. S5. Repeat steps S2-S4 until all the activated carbon in the activated carbon bed (100) is extracted.

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