A dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator

Abstract

The present application discloses a dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator, including a first-layer maze exhaust and a second-layer accelerator chamber exhaust. The first-layer maze exhaust is composed of an air inlet, an exhaust metal duct, a concrete exhaust duct, a first-layer maze exhaust fan and its support system. Natural wind enters through the mazes on both sides, and finally merges into the exhaust main duct on the top through the duct and the fan. The first and second-layer exhaust can take away the heat generated by the irradiation window and the second-layer accelerator chamber machine at the same time to ensure stable operation of the equipment; the main exhaust duct is set as a dual-channel structure, and the exhaust of the first-layer maze and the second-layer accelerator can be independently merged into the main duct, and each independently enters the corresponding channel without affecting each other, which is conducive to reducing air outlets, facilitating duct fixation and reducing design difficulty and cost.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust technology for an irradiation chamber of an irradiation electron accelerator, in particular to a double-fan exhaust system for an irradiation chamber of an irradiation electron accelerator. Background Art

[0002] When the irradiation electron accelerator is working for irradiation sterilization, a large amount of ozone will be generated. Since high-concentration ozone is a harmful gas, the national standard of the irradiation station requires that the generated ozone must be discharged in time to ensure the health and safety of surrounding personnel; during irradiation work, the irradiation window and its titanium film part will generate high temperature due to the highly concentrated beam energy. If the heat is not dissipated in time, the high-intensity beam will burn the titanium film and cause equipment downtime; the accelerator room equipment will also generate a large amount of heat when working, and the heat must be taken away in time to ensure stable and reliable operation of the equipment; at the same time, the radiation dose will overflow through the reserved air duct openings, and special design is required to block it to ensure that the external radiation dose meets the national standard requirements; when the first and second floors are ventilated separately, if separate air ducts are built, due to national standards, the external air ducts are as high as more than ten meters. Multiple air ducts increase the installation and maintenance costs, and are not conducive to later safety. This application proposes a dual-fan exhaust system for the irradiation room of an irradiation electron accelerator to solve the above problems. Summary of the invention

[0003] The technical solution adopted by the present invention to solve the above technical problems is to provide a dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator, wherein the specific technical solution is:

[0004] Including the first floor maze exhaust and the second floor accelerator room exhaust;

[0005] The first layer of maze exhaust includes a first layer of maze exhaust metal duct, the first layer of maze exhaust metal duct is provided with a first layer of maze exhaust metal duct, the first layer of maze exhaust metal duct is connected to a first layer of maze exhaust concrete duct, the first layer of maze exhaust concrete duct is connected to a first layer of maze exhaust fan, the first layer of maze exhaust fan is connected to a first layer of maze exhaust fan outlet, the first layer of maze exhaust fan outlet is connected to the exhaust main duct, and the exhaust main duct is fixed by a first layer of maze exhaust fan bracket;

[0006] The second-floor accelerator room exhaust includes a second-floor accelerator room natural wind inlet, the second-floor accelerator room natural wind inlet is connected to the second-floor accelerator room external metal wind duct, the second-floor accelerator room external metal wind duct is fixed by an exhaust duct fixing frame, the second-floor accelerator room external metal wind duct is connected to the second-floor accelerator room exhaust fan, and the second-floor accelerator room exhaust fan is connected to the second-floor accelerator room exhaust fan outlet;

[0007] The exhaust fan outlet of the second-floor accelerator room is provided with a main exhaust duct of the fan exhaust duct of the second-floor accelerator room, the exhaust fan outlet of the first-floor maze is provided with a main exhaust duct of the fan exhaust duct of the first-floor maze, the main exhaust duct of the fan exhaust duct of the second-floor accelerator room and the main exhaust duct of the fan exhaust duct of the first-floor maze are both connected to the main exhaust duct, the main exhaust duct is provided with an air outlet, and the main exhaust duct is fixed by a main exhaust duct fixing frame.

[0008] The above-mentioned dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator, wherein: the air inlet of the first-layer maze is close to the irradiation window, and the center of the air duct is higher than the outlet of the irradiation window, the concrete air duct of the first-layer maze exhaust is an S-shaped structure, the exhaust fan of the first-layer maze is a silent box-type centrifugal fan, the outlet of the exhaust fan of the first-layer maze is independently merged into the main air duct of the exhaust main air duct, the natural wind inlet of the first-layer maze enters through the maze outlet, and is merged into the main exhaust air duct on the top through the metal air duct, the concrete air duct and the fan.

[0009] The above-mentioned dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator, wherein: the natural wind inlet of the second-layer accelerator chamber is formed by the cross-section of the natural wind inlet duct of the second-layer accelerator chamber, and the duct is L-shaped. The exhaust fan of the second-layer accelerator chamber is a silent box-type centrifugal fan. The air inlet of the second-layer accelerator chamber is in an inverted Z shape. The outlet of the exhaust fan of the second-layer accelerator chamber independently merges into the main air duct of the exhaust main air duct. The natural wind inlet of the second-layer accelerator chamber enters through the cross-section of the natural wind inlet duct of the second-layer accelerator chamber, and is merged into the main exhaust air duct on the top through the metal air duct, the concrete air duct and the fan.

[0010] The above-mentioned dual-fan exhaust system for the irradiation chamber of an irradiation electron accelerator, wherein: the exhaust main air duct is arranged in a dual-channel structure, the exhaust air of the first-layer maze and the second-layer accelerator can be independently merged into the main air duct, and each independently enters the corresponding main air duct-first-layer maze fan exhaust duct, main air duct-second-layer accelerator room fan exhaust duct, the metal exhaust duct fixing frame, the exhaust fan bracket, and the main air duct fixing frame are all metal welded frame structures.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the first-layer exhaust concrete duct is in a vertical "S" shape, the second-layer exhaust concrete duct is in a horizontal inverted "Z" shape, and the second-layer exhaust natural wind inlet duct is in an "L" shape, which attenuates the intensity of the overflowing radiation rays and ensures the radiation safety of the air outlet. At the same time, the first-layer and second-layer exhaust can simultaneously take away the heat generated by the irradiation window and the second-layer accelerator room machine to ensure the stable operation of the equipment; the main exhaust duct is set as a dual-channel structure, and the exhaust of the first-layer maze and the second-layer accelerator can be independently merged into the main duct, and each independently enters the corresponding channel without affecting each other, which is conducive to reducing the air outlet, facilitating the fixing of the duct and reducing the design difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the first-floor maze exhaust structure.

[0013] Figure 2 This is a schematic diagram of the exhaust structure and total exhaust of the second-floor accelerator room.

[0014] In the figure:

[0015] 1-1 Electron accelerator radiation shielding room; 1-2 Beam irradiation window; 1-3 Air inlet of the first floor maze; 1-4 Exhaust direction of the first floor maze; 1-5 Metal air duct for exhaust of the first floor maze; 1-6 Concrete air duct for exhaust of the first floor maze; 1-7 Air inlet of the second floor accelerator room; 1-8 Exhaust fan of the first floor maze; 1-9 Exhaust fan outlet of the first floor maze; 1-10 Main exhaust duct; 1-11 Exhaust fan bracket of the first floor maze; 1-12 Main exhaust duct bracket.

[0016] 2-1 Natural wind inlet of the accelerator room on the second floor; 2-2 Section of the natural wind inlet duct of the accelerator room on the second floor; 2-3 Exhaust direction of the accelerator room on the second floor; 2-4 External metal air duct of the accelerator room on the second floor; 2-5 Exhaust duct fixing frame; 2-6 Exhaust fan of the accelerator room on the second floor; 2-7 Exhaust fan outlet of the accelerator room on the second floor; 2-8 Exhaust main air duct fixing frame; 2-9 Air outlet of exhaust main air duct; 2-10 Main air duct of fan exhaust duct of the accelerator room on the second floor; 2-11 Main air duct of fan exhaust duct of the first floor maze. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] The invention provides a double-fan exhaust system for an irradiation chamber of an irradiation electron accelerator, comprising a first layer of maze exhaust and a second layer of accelerator chamber exhaust.

[0019] The first-layer maze exhaust includes: a first-layer maze air inlet 1-3, a first-layer maze exhaust metal air duct 1-5, a first-layer maze exhaust concrete air duct 1-6, a first-layer maze exhaust fan 1-8, a first-layer maze exhaust fan outlet 1-9, an exhaust main air duct 1-10 and a first-layer maze exhaust fan bracket 1-11. The first-layer maze air inlet 1-3 is close to the irradiation window, and the center of the air duct is higher than the irradiation window outlet, which is used to take away the high temperature heat of the irradiation window and its titanium film, ensuring the long life and stable operation of the irradiation window. The first-layer maze exhaust concrete duct 1-6 is an S-shaped structure, which is used to attenuate the radiation dose overflowing from the duct. The first-layer maze exhaust fan 1-8 is a silent box-type centrifugal fan. The first-layer maze exhaust fan outlet 1-9 independently merges into the main exhaust duct 1-10 - the first-layer maze fan exhaust duct. The first-layer maze natural wind enters through the maze port, and finally merges into the top exhaust main duct 1-10 through the metal duct, concrete duct and fan.

[0020] The exhaust system of the second-floor accelerator room includes: the natural wind inlet 2-1 of the second-floor accelerator room, the natural wind inlet duct section 2-2 of the second-floor accelerator room, the external metal air duct 2-4 of the second-floor accelerator room, the exhaust duct fixing frame 2-5, the exhaust fan 2-6 of the second-floor accelerator room, the exhaust fan outlet 2-7 of the second-floor accelerator room, the air inlet 2-1 of the second-floor accelerator room, and the air inlet 2-1 of the second-floor accelerator room is a concrete air duct.

[0021] The natural wind inlet 2-1 of the second-floor accelerator room is formed by the natural wind inlet duct section 2-2 of the second-floor accelerator room. The duct is L-shaped and is used to attenuate the radiation dose overflowing from the duct. The exhaust fan 2-6 of the second-floor accelerator room is a silent box-type centrifugal fan. The air inlet 2-1 of the second-floor accelerator room is in an inverted Z shape and is used to attenuate the radiation dose overflowing from the duct. The exhaust fan outlet 2-7 of the second-floor accelerator room independently merges into the main duct of the exhaust main duct-the second-floor accelerator room fan exhaust duct. The natural wind inlet of the second-floor accelerator room enters through the natural wind inlet duct section 2-2 of the second-floor accelerator room, and finally merges into the exhaust main duct at the top through the metal duct, concrete duct and fan. The second-floor accelerator room takes away the high temperature heat generated by the second-floor accelerator equipment through natural exhaust to ensure stable operation of the equipment.

[0022] The exhaust main air ducts 1-10 are set as a dual-channel structure. The exhaust air from the first-floor maze and the second-floor accelerator can be independently merged into the main air duct, and each independently enters the corresponding main air duct-first-floor maze fan exhaust duct and main air duct-second-floor accelerator room fan exhaust duct. The exhaust does not affect each other, which greatly simplifies the difficulty of fixing and designing the exhaust duct. The metal exhaust duct fixing frame, exhaust fan bracket, and main air duct fixing frame are all metal welded frame structures. During installation, the rack support feet are cast in concrete to increase the stability of the rack.

[0023] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A dual-fan exhaust system for an irradiation chamber of an irradiation electron accelerator, characterized in that: Including the first floor maze exhaust and the second floor accelerator room exhaust; The first layer of maze exhaust includes a first layer of maze exhaust metal duct, the first layer of maze exhaust metal duct is provided with a first layer of maze exhaust metal duct, the first layer of maze exhaust metal duct is connected to a first layer of maze exhaust concrete duct, the first layer of maze exhaust concrete duct is connected to a first layer of maze exhaust fan, the first layer of maze exhaust fan is connected to a first layer of maze exhaust fan outlet, the first layer of maze exhaust fan outlet is connected to the exhaust main duct, and the exhaust main duct is fixed by a first layer of maze exhaust fan bracket; The second-floor accelerator room exhaust includes a second-floor accelerator room natural wind inlet, the second-floor accelerator room natural wind inlet is connected to the second-floor accelerator room external metal wind duct, the second-floor accelerator room external metal wind duct is fixed by an exhaust duct fixing frame, the second-floor accelerator room external metal wind duct is connected to the second-floor accelerator room exhaust fan, and the second-floor accelerator room exhaust fan is connected to the second-floor accelerator room exhaust fan outlet; The exhaust fan outlet of the second-floor accelerator room is provided with a main exhaust duct of the fan exhaust duct of the second-floor accelerator room, the exhaust fan outlet of the first-floor maze is provided with a main exhaust duct of the fan exhaust duct of the first-floor maze, the main exhaust duct of the fan exhaust duct of the second-floor accelerator room and the main exhaust duct of the fan exhaust duct of the first-floor maze are both connected to the main exhaust duct, the main exhaust duct is provided with an air outlet of the main exhaust duct, and the main exhaust duct is fixed by a main exhaust duct fixing frame; The air inlet of the first-floor maze is close to the irradiation window, and the center of the air duct is higher than the outlet of the irradiation window. The concrete air duct of the first-floor maze exhaust is an S-shaped structure. The exhaust fan of the first-floor maze is a silent box-type centrifugal fan. The outlet of the exhaust fan of the first-floor maze is independently connected to the main air duct of the exhaust main air duct. The natural wind inlet of the first-floor maze enters through the maze outlet and is connected to the main exhaust air duct on the top through the metal air duct, concrete air duct and fan. The natural wind inlet of the second-floor accelerator room is formed by the section of the natural wind inlet duct of the second-floor accelerator room, and the duct is L-shaped. The exhaust fan of the second-floor accelerator room is a silent box-type centrifugal fan. The air inlet of the second-floor accelerator room is in an inverted Z shape, and the exhaust fan outlet of the second-floor accelerator room independently merges into the main air duct of the exhaust main air duct. The natural wind inlet of the second-floor accelerator room enters through the section of the natural wind inlet duct of the second-floor accelerator room, and is merged into the main exhaust air duct on the top through the metal air duct, concrete air duct and fan.

2. A dual-fan exhaust system for an irradiation chamber of an irradiation electron accelerator according to claim 1, characterized in that: The exhaust main air duct is set as a dual-channel structure. The exhaust air from the first-floor maze and the second-floor accelerator can be independently merged into the main air duct, and each independently enters the corresponding main air duct-first-floor maze fan exhaust duct and main air duct-second-floor accelerator room fan exhaust duct. The metal exhaust duct fixing frame, exhaust fan bracket, and main air duct fixing frame are all metal welded frame structures.

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