Waste gas and waste residue collecting device for radioactive metal waste thermal cutting process

Abstract

The invention relates to the technical field of waste gas and waste residue treatment in the nuclear industry, in particular to a waste gas and waste residue collecting device used in the radioactive metal waste thermal cutting process. The waste gas and waste residue collecting device for the radioactive metal waste thermal cutting process comprises a rack, an exhaust device, a filtering box body, a dust collection inlet pipe and a dust collection outlet pipe. And the air exhaust device, the filter box body, the dust collection inlet pipe and the dust collection outlet pipe are arranged on the rack. The air exhaust device is connected with the outlet end of the filter box body through a dust collection outlet pipe, and the dust collection outlet pipe is connected with the inlet end of the filter box body. The filter box body is of a modular structure and is detachably connected with the rack, the dust collection inlet pipe and the dust collection outlet pipe. In the implementation mode, the filtering box body is arranged to be of a modular structure, and the filtering box body is detachably connected with the rack, the dust collection inlet pipe and the dust collection outlet pipe, so that long-distance replacement of the filtering box body can be realized, and secondary irradiation of an operator cannot be caused.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas and waste residue treatment in the nuclear industry, in particular to a waste gas and waste residue collection device used in a radioactive metal waste thermal cutting process. Background Art

[0002] The thermal cutting process of radioactive metal waste inevitably results in the splashing of waste residues and the spread of contaminants, leading to abnormally high aerosol levels within the cutting area or surface contamination, which is detrimental to the safety of on-site workers and the environment. When operating conditions permit, temporary gas tents are often used to address this issue. However, this approach is not practical when the on-site working space is relatively confined or the on-site dose is high. Summary of the Invention

[0003] The purpose of the present invention is to provide a waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste. The collection device is designed for metal thermal cutting operations with a small working space and high doses at the work site. It can reduce the diffusion range of waste residues and waste gas during the thermal cutting process, thereby ensuring the safety of cutting workers and the environment.

[0004] The present invention provides a waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste, which includes a frame, an exhaust device, a filter box, a dust suction inlet pipe and a dust suction outlet pipe;

[0005] The exhaust device, filter box, dust inlet pipe and dust outlet pipe are arranged on the frame;

[0006] The exhaust device is connected to the outlet end of the filter box through a dust suction outlet pipe, and the dust suction outlet pipe is connected to the inlet end of the filter box;

[0007] The filter box has a modular structure, and the filter box is detachably connected to the frame, the dust suction inlet pipe and the dust suction outlet pipe.

[0008] Preferably, the exhaust device includes a low-pressure fan, a high-pressure fan, a low-pressure air duct and a high-pressure air duct;

[0009] The low-pressure fan and the high-pressure fan are connected to the dust collection outlet pipe through the low-pressure air duct and the high-pressure air duct respectively;

[0010] Air duct valves are provided on both the low-pressure air duct and the high-pressure air duct.

[0011] Preferably, the air duct valve is an electrically controlled butterfly valve.

[0012] Preferably, the filter box includes a primary filter box and a high-efficiency filter box.

[0013] Preferably, a roller platform is provided below the primary filter box and the high efficiency filter box.

[0014] Preferably, the dust suction inlet pipe and the dust suction outlet pipe are connected to a driving device, and are connected to or separated from the inlet end and the outlet end of the filter box under the drive of the driving device.

[0015] Preferably, the driving device is a push-pull mechanism, and the push-pull mechanism includes a cylinder, which drives the dust suction inlet pipe and the dust suction outlet pipe to move.

[0016] Preferably, lead plates are provided on the top and both sides of the filter box to shield the filter.

[0017] Preferably, a filter dosage detection instrument is installed on the outer side of the lead plate.

[0018] Preferably, the pipe openings where the dust suction inlet pipe and the dust suction outlet pipe connect with the inlet end and the outlet end of the filter box are conical and are provided with sealing rubber pads.

[0019] Beneficial effects:

[0020] (1) Aiming at the different scenarios of waste gas and waste residue collection required by thermal cutting of radioactive metal waste, the waste gas and waste residue can be effectively collected during the process to ensure the safety of cutting workers and the environment;

[0021] (2) The modular design of the dust filter allows for easy remote replacement without causing secondary exposure to workers;

[0022] (3) The dust filter is designed with shielding measures and dose monitoring facilities to ensure the safety of operators and the environment;

[0023] (4) The present invention has a compact structure, complete functions, and is easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of a waste gas and waste residue collection device for a radioactive metal waste thermal cutting process according to the present invention is provided as a specific embodiment;

[0026] Description of reference numerals:

[0027] 1: Frame, 2: Dust inlet pipe, 3: Dust outlet pipe, 4: Low-pressure fan, 5: High-pressure fan, 6: Air duct valve, 7: Primary filter box, 8: High-efficiency filter box, 9: Push-pull mechanism. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] like Figure 1 As shown, this embodiment provides a waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste, which includes a frame 1, an exhaust device, a filter box, a dust suction inlet pipe 2 and a dust suction outlet pipe 3.

[0032] The exhaust device, the filter box, the dust suction inlet pipe 2 and the dust suction outlet pipe 3 are arranged on the frame 1.

[0033] The exhaust device is connected to the outlet end of the filter box through the dust suction outlet pipe 3, and the dust suction outlet pipe 3 is connected to the inlet end of the filter box.

[0034] The filter box has a modular structure, and the filter box is detachably connected to the frame 1, the dust inlet pipe 2 and the dust outlet pipe 3.

[0035] In this embodiment, by setting the filter box into a modular structure and detachably connecting the filter box to the frame 1, the dust inlet pipe 2 and the dust outlet pipe 3, the filter box can be replaced remotely without causing secondary exposure to the operators.

[0036] The exhaust device includes a low-pressure fan 4, a high-pressure fan 5, a low-pressure air duct and a high-pressure air duct.

[0037] The low-pressure fan 4 and the high-pressure fan 5 are connected to the dust outlet pipe 3 through a low-pressure air duct and a high-pressure air duct respectively. Air duct valves 6 are provided on the low-pressure air duct and the high-pressure air duct.

[0038] The air duct valve 6 is an electrically controlled butterfly valve.

[0039] High-pressure air ducts are designed for scenarios where the exhaust gas emission requirements are high pressure and small flow, such as small-scale operations such as pipe cutting and grinding in equipment rooms; low-pressure air ducts are designed for scenarios where the exhaust gas emission requirements are low pressure and large flow, such as metal pipe and tank cutting in an open environment. The fans in each air duct are also adapted to their specific emission requirements. Taking the high-pressure exhaust duct as an example, when using the high-pressure air duct, first close the electric butterfly valve and fan corresponding to the low-pressure air duct through the control system, then connect the outlet pipe of the exhaust device to the exhaust system pipe of the working area, turn on the high-pressure air duct fan and then carry out the cutting operation. After the exhaust gas and waste residue from the cutting process enter the air duct, they are filtered through the primary and high-efficiency filters respectively before entering the exhaust system.

[0040] By setting up different air ducts, it is possible to effectively collect waste gas and waste residue during the thermal cutting of radioactive metal waste in accordance with different collection requirements, thus ensuring the safety of cutting workers and the environment.

[0041] The filter box body comprises a primary filter box 7 and a high efficiency filter box 8. A roller platform is provided below the primary filter box 7 and the high efficiency filter box 8.

[0042] The dust suction inlet pipe 2 and the dust suction outlet pipe 3 are connected to the driving device, and are connected to or separated from the inlet end and the outlet end of the filter box under the drive of the driving device.

[0043] The driving device is a push-pull mechanism 9 , which includes a cylinder. The cylinder drives the dust suction inlet pipe 2 and the dust suction outlet pipe 3 to move.

[0044] Lead plates are provided on the top and both sides of the filter box to shield the filter.

[0045] A filter dosage detection instrument is installed on the outside of the lead plate.

[0046] The pipe openings where the dust suction inlet pipe 2 and the dust suction outlet pipe 3 are connected to the inlet end and the outlet end of the filter box are conical and are provided with sealing rubber pads.

[0047] Specifically,

[0048] The filter housing adopts a modular design, with roller platforms located beneath the primary and high-efficiency filter housings. The push-pull mechanism 9, mounted on the dust inlet pipe 2, moves left and right to connect and disconnect the dust inlet pipe 2 from the filter housing inlet. The dust outlet pipe 3 is also connected to the dust filter using a cylinder, making it easy to connect and disconnect.

[0049] The dust filter is designed with shielding measures and dose monitoring facilities to ensure the safety of operators and the environment. Specifically, lead plates are designed on both sides and the top of the filter box to shield it. A filter dose monitoring instrument is installed on the outside of the lead plate. When its dose rate reaches the replacement requirement, the dust inlet pipe 2 is pushed open by the cylinder, and the dust outlet pipe 3 is separated from the filter box by the push-pull cylinder. Then, the top lead plate is lifted remotely by a special hoist. In order to position the filter box, a filter box clamping cylinder is provided on the frame 1. Clamping cylinders are provided on both sides of the filter box. Under normal conditions, the filter box is clamped by the clamping cylinder to fix the filter box. When the filter box needs to be replaced, the clamping cylinder is released, and the filter core and its shell are lifted remotely by the hoist. The new filter box is installed by the positioning ramp and positioning slot. Sealing rubber pads are installed at the docking positions of the filter box inlet and outlet ends with the dust inlet pipe 2 and dust outlet pipe 3. The docking pipe ports are conical surfaces, which can ensure the centering of the filter box and the air duct during docking and the sealing after docking.

[0050] In order to further illustrate the above-mentioned waste gas and waste residue collection device, this embodiment also provides the specific working process of the device as follows:

[0051] (1) According to the specific exhaust scene requirements, the control system will open the corresponding air duct electric butterfly valve and close the other air duct electric butterfly valve;

[0052] (2) The outlet pipe of the exhaust device is connected to the exhaust pipe of the working area through the exhaust duct hose, and the on-site personnel are notified to appropriately increase the exhaust volume of the area;

[0053] (3) Connect the dust suction inlet pipe 2 to the air inlet hose, move the air inlet hose to the vicinity of the working position, turn on the corresponding air duct fan, check whether there is any air leakage at the connection between the filter and the air duct, whether the filter box shell is pressed tightly, and whether the air duct pressure display is normal;

[0054] (4) After all parts of the equipment are operating normally, start cutting operation. If it is found that the cutting smoke and waste residue cannot be effectively collected, the fan speed will be appropriately increased through the control system;

[0055] (5) When the filter element dosage monitoring instrument indicates that the filter needs to be replaced, the on-site personnel stop working and shut down the fan through the control system;

[0056] (6) Close all the electric butterfly valves in the air ducts and lift the shielding lead plate on the top of the filter box with a special lifting device;

[0057] (7) Loosen the compression cylinders on both sides of the dust filter box, lift the filter box from a distance using a special lifting device, and place it in a designated location for processing;

[0058] (8) Place the filter box with the new filter element on the roller platform, start the push-pull cylinder, and reconnect the dust suction inlet pipe 2 and the dust suction outlet pipe 3 to the filter box;

[0059] (9) Check whether the dosage level of the new filter meets the operating requirements. If so, continue the cutting operation.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for collecting waste gas and waste residue during the thermal cutting process of radioactive metal waste, characterized in that: It includes a frame, an exhaust device, a filter box, a dust suction inlet pipe and a dust suction outlet pipe; The exhaust device, filter box, dust inlet pipe and dust outlet pipe are arranged on the frame; The exhaust device is connected to the outlet end of the filter box through a dust suction outlet pipe, and the dust suction outlet pipe is connected to the inlet end of the filter box; The filter box has a modular structure, and the filter box is detachably connected to the frame, the dust suction inlet pipe and the dust suction outlet pipe.

2. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 1 is characterized in that: The exhaust device includes a low-pressure fan, a high-pressure fan, a low-pressure air duct and a high-pressure air duct; The low-pressure fan and the high-pressure fan are connected to the dust collection outlet pipe through the low-pressure air duct and the high-pressure air duct respectively; Air duct valves are provided on both the low-pressure air duct and the high-pressure air duct.

3. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 2 is characterized in that: The air duct valve is an electrically controlled butterfly valve.

4. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 1 is characterized in that: The filter box includes a primary filter box and a high-efficiency filter box.

5. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 4 is characterized in that: A roller platform is provided below the primary filter box and the high efficiency filter box.

6. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 1 is characterized in that: The dust suction inlet pipe and the dust suction outlet pipe are connected to the driving device, and are connected to or separated from the inlet end and the outlet end of the filter box body under the drive of the driving device.

7. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 6 is characterized in that: The driving device is a push-pull mechanism, which includes a cylinder. The cylinder drives the dust suction inlet pipe and the dust suction outlet pipe to move.

8. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 1 is characterized in that: Lead plates for shielding the filter are arranged on the top and both sides of the filter box.

9. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 8, characterized in that: A filter dosage detection instrument is installed on the outer side of the lead plate.

10. The waste gas and waste residue collection device for the thermal cutting process of radioactive metal waste according to claim 1, characterized in that: The pipe openings where the dust suction inlet pipe and the dust suction outlet pipe are connected to the inlet end and the outlet end of the filter box are conical and are provided with sealing rubber pads.

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