Decontamination device for nuclear power station

Abstract

The invention discloses a decontamination device for a nuclear power plant, and relates to the technical field of nuclear power plant decontamination, the decontamination device comprises an ice crushing box, one side of the ice crushing box is connected with a first connecting pipe, one end, away from the ice crushing box, of the first connecting pipe is connected with a high-pressure gas cylinder, and one side of the ice crushing box is connected with a second connecting pipe; the end, away from the ice crushing box, of the second connecting pipe is connected with a spray gun, and one side of the spray gun is connected with a decontamination box. Dry ice particles are sprayed to the surface of the to-be-decontaminated equipment through high-pressure gas, efficient, rapid and thorough decontamination of radioactive contamination equipment is achieved, the surface of a cleaned object cannot be damaged, carbon dioxide can be directly gasified in the dry ice cleaning process and returns to air, secondary waste and residues cannot be generated, and the cleaning effect is good. The cleaning agent is high in decontamination efficiency, environment-friendly, healthy and low in requirement for use space.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant decontamination, and particularly to a decontamination device for nuclear power plants. Background Art

[0002] In the operation and maintenance work of nuclear power plants, a large number of radioactive contaminated equipment are generated every year. Most of this equipment has not lost its functionality, but it is easy to cause personnel contamination. To reduce the negative impact of radioactive contaminated equipment on the operation and maintenance of nuclear power plants, it is necessary to decontaminate the radioactive contaminated equipment. The current main decontamination processes in nuclear power plants are immersion and wiping decontamination. After chemical decontamination of components and completion of cleaning, there are often stains remaining, and there are many dead corners that cannot be cleaned. The decontamination coefficient is low, the decontamination efficiency is low, and a large amount of secondary waste liquid is generated, and it is impossible to deeply decontaminate the equipment through chemical decontamination. Laser decontamination technology has started to be applied to nuclear power plants in recent years due to its high decontamination efficiency and non-contact advantages, but the dust generated by laser decontamination has not been considered. Due to the particularity of nuclear power plants, the dust generated by laser decontamination often has radioactivity. If this dust adheres to the bodies of workers, it will affect the health of the workers, and laser decontamination will cause damage and ablation to the surface of the equipment during the decontamination process.

[0003] Therefore, there is an urgent need to propose a decontamination device for nuclear power plants. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title, but such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing decontamination devices for nuclear power plants, the present invention is proposed.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A decontamination device for nuclear power plants, comprising,

[0007] A dry ice crusher, one side of the dry ice crusher is connected with a first connecting pipe, the end of the first connecting pipe far away from the dry ice crusher is connected with a high-pressure gas cylinder, one side of the dry ice crusher is connected with a second connecting pipe, the end of the second connecting pipe far away from the dry ice crusher is connected with a spray gun, and one side of the spray gun is connected with a decontamination tank.

[0008] As a preferred solution of the decontamination device for nuclear power plants of the present invention, wherein: the dry ice crusher includes a box body and a cover plate, the box body is used to accommodate dry ice, and the cover plate is used to seal the box body.

[0009] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: a motor is provided on one side of the ice crusher, a drive shaft is provided on the motor, the drive shaft is connected to the ice crusher, and a mounting bracket is provided on one side of the motor, and the motor is placed in the mounting bracket.

[0010] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: a support frame is connected to one side of the ice crusher, a moving seat is connected to one side of the support frame, a cabinet body is provided on the moving seat, and the ice crusher, high-pressure gas cylinder and motor are all located in the cabinet body.

[0011] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: rollers are installed at the bottom of the moving seat.

[0012] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: the decontamination box includes a base, a circular clamping seat provided on the base, and a decontamination cover connected to the circular clamping seat, and a rotatable tray is installed on the base, and the equipment to be decontaminated is arranged on the rotatable tray.

[0013] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: the decontamination cover is made of organic transparent glass.

[0014] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: the second connecting pipe includes a first branch pipe connected to the side of the ice crusher and a second branch pipe connected to the first branch pipe;

[0015] The end of the second branch pipe away from the first branch pipe is connected to the tail end of the spray gun.

[0016] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: an insertion nozzle is provided on the side of the decontamination box, and the spray gun is inserted into the insertion nozzle.

[0017] As a preferred embodiment of the decontamination device for nuclear power plants according to the present invention, wherein: multiple groups of spray guns are provided, and multiple groups of insertion nozzles with the same number as the spray guns are also provided.

[0018] Advantages of the present invention: By using high-pressure gas to spray dry ice particles onto the surface of the equipment to be decontaminated, the present invention realizes efficient decontamination of radioactive contaminated equipment, which is fast, thorough, and does not damage the surface of the object to be cleaned. During the dry ice cleaning process, carbon dioxide will directly gasify, and carbon dioxide will return to the air, without generating secondary waste and residues, with high decontamination efficiency, environmental protection, health and low requirements for the use space. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention. Specific embodiments

[0021] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention in conjunction with the drawings in the specification.

[0022] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that mutually excludes other embodiments.

[0024] Furthermore, the present invention will be described in detail in conjunction with the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention here. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0025] Embodiment 1

[0026] Refer to Figure 1, which is the first embodiment of the present invention, provides a decontamination device for a nuclear power plant, including a dry ice crusher 100 for crushing dry ice. A first connecting pipe 200 is fixedly connected to the side of the dry ice crusher 100. One end of the first connecting pipe 200 away from the dry ice crusher 100 is fixedly connected to a high-pressure gas cylinder 300. The high-pressure gas (usually compressed air or other inert gas) stored in the high-pressure gas cylinder 300. Another side of the dry ice crusher 100 is fixedly connected to a second connecting pipe 400. One end of the second connecting pipe 400 away from the dry ice crusher 100 is fixedly connected to a spray gun 500. One side of the spray gun 500 is connected to a decontamination tank 600. Equipment to be decontaminated is placed in the decontamination tank 600. The high-pressure gas cylinder 300 and the dry ice crusher 100 are used in cooperation to break dry ice into fine particles, and the dry ice particles are sprayed onto the surface of the decontamination equipment in the decontamination tank 600 through the jet force of the high-pressure gas through the spray gun 500 to achieve decontamination.

[0027] The dry ice crusher 100 includes a box body 101 and a cover plate 102. The box body 101 is used to accommodate dry ice. The cover body and the cover plate 102 are detachably connected. The cover plate 102 is used to seal the cover plate 102 to ensure that dry ice will not leak during the decontamination process.

[0028] A motor 103 is provided at the bottom of the dry ice crusher 100. A drive shaft 105 is provided on the motor 103. The drive shaft 105 is connected to the drive component of the dry ice crusher 100. An installation frame 104 is provided on one side of the motor 103. The motor 103 is placed in the installation frame 104. The dry ice crusher 100 is located on the installation frame 104. The motor 103 is used to provide driving force for the dry ice crusher 100.

[0029] A support frame 106 is fixedly installed at the bottom of the dry ice crusher 100. A moving seat 107 is fixedly installed at the bottom of the support frame 106. A cabinet 108 is fixedly installed on the moving seat 107. The second connecting pipe 400 passes through the cabinet. The dry ice crusher 100, the high-pressure gas cylinder 300 and the motor 103 are all located in the cabinet 108. The dry ice crusher 100 is fixedly arranged in the cabinet 108. The cabinet 108 can protect the equipment inside it, and the dry ice crusher 100, the high-pressure gas cylinder 300 and the motor 103 can be moved integrally through the moving seat 107.

[0030] A plurality of rollers 109 are installed at the bottom of the moving seat 107 to provide support for the moving seat 107 and enable the moving seat 107 to move. A brake is provided on the rollers 109. When needed, the brake is opened to avoid unnecessary rolling of the rollers 109.

[0031] When in use, after moving this device to the site, turn on the wheel brakes, check that the equipment connections are stable, place the equipment to be decontaminated into the decontamination box 600, insert the spray gun 500 into the decontamination box 600, open the cabinet door of the cabinet body 108 and the cover plate 102 of the ice crusher 100, add dry ice to the ice crusher 100, start the dry ice cleaning machine. After the dry ice is crushed, open the high-pressure gas cylinder 300 and start the cleaning work.

[0032] Dry ice cleaning uses the method of dry ice particle spraying, which can quickly and thoroughly remove dirt and will not damage the surface of the object being cleaned. During the dry ice cleaning process, carbon dioxide will directly vaporize and return to the air, without generating secondary waste and residues. It has high decontamination efficiency, is environmentally friendly and healthy, and has low requirements for the use space, and the machine is easy to operate.

[0033] When the cleaning work is in progress, pay attention to the pressure of the high-pressure gas cylinder 300. The air pressure needs to be adjusted according to the material of the cleaning surface and the degree of cleaning. After the high-pressure gas cylinder 300 is used up, replace the gas cylinder. At the same time, observe the cleaning condition of the dirt on the equipment surface. When there is no dirt on the equipment surface and a metallic luster appears, the cleaning work ends.

[0034] After the cleaning is completed, clean the sundries and dry ice particles inside the equipment, and check and replace the parts of the equipment to ensure the normal use of the equipment.

[0035] Embodiment 2

[0036] Refer to Figure 1 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the decontamination box 600 includes a base 601, a circular card seat 602 fixedly connected to the upper side of the base 601, and a decontamination cover 603 clamped on the circular card seat 602. A rotatable tray is installed on the upper side of the base 601, and the equipment to be decontaminated is placed on the rotatable tray.

[0037] The decontamination cover 603 is made of organic transparent glass, which not only ensures the strength of the decontamination cover 603 but also provides good transparency, facilitating the operator to observe the decontamination process.

[0038] Before starting the ice crusher, place the equipment to be decontaminated on the rotatable tray in advance, then use the organic equipment to clamp it on the circular card seat 602, cover and enclose the equipment to be decontaminated to prevent the leakage of the pollution medium during the decontamination process. During decontamination, drive the rotatable tray to drive the equipment to be decontaminated to rotate relative to the spray gun 500 to clean the entire circumference of the equipment to be decontaminated.

[0039] The remaining structures are the same as those in Embodiment 1.

[0040] Embodiment 3

[0041] Refer to Figure 1, which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the connecting pipe two 400 includes a branch pipe one 401 fixedly connected to the side of the shredder refrigerator 100 and a branch pipe two 402 fixedly connected to the branch pipe one 401. One end of the branch pipe two 402 far from the branch pipe one 401 is fixedly connected to the tail end of the spray gun 500.

[0042] A muzzle 501 is fixedly arranged on the side of the decontamination box 600, and the spray gun 500 is inserted into the muzzle 501.

[0043] Four groups of spray guns 500 are provided, and four groups of muzzles 501 with the same number as the spray guns 500 are also provided.

[0044] High-pressure gas can enter the shredder refrigerator 100 from the connecting pipe one 200 and then enter the branch pipe one 401, enter the branch pipe two 402 through the branch pipe one 401, and enter each spray gun 500 from the branch pipe two 402. The nozzles of the spray guns 500 are all nozzles that can be adjusted at multiple angles. The provision of multiple groups of spray guns 500 is to increase the decontamination range. The multi-angle adjustable setting of the nozzles can be adjusted according to the height, shape and angle of the cleaning surface, improving the decontamination efficiency.

[0045] The rest of the structure is the same as that of Embodiment 2.

[0046] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible on the premise of not substantially deviating from the novel teachings and advantages of the subject matter described in this application (for example, the dimensions, scales, structures, shapes and proportions of various components, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structure that performs the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0047] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the invention or those features that are not relevant to the implementation of the invention).

[0048] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts would be a routine task of design, fabrication, and production.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A decontamination device for a nuclear power plant, characterized in that: include, A crushed refrigerator (100), wherein one side of the crushed refrigerator (100) is connected to a connecting pipe 1 (200), an end of the connecting pipe 1 (200) away from the crushed refrigerator (100) is connected to a high-pressure gas cylinder (300), one side of the crushed refrigerator (100) is connected to a connecting pipe 2 (400), an end of the connecting pipe 2 (400) away from the crushed refrigerator (100) is connected to a spray gun (500), and one side of the spray gun (500) is connected to a decontamination box (600).

2. The decontamination device for a nuclear power plant according to claim 1, characterized in that: The crushed ice box (100) comprises a box body (101) and a cover plate (102), wherein the box body (101) is used to contain dry ice, and the cover plate (102) is used to seal the cover plate (102).

3. The decontamination device for a nuclear power plant according to claim 2, characterized in that: A motor (103) is provided on one side of the crushed ice box (100), a driving shaft (105) is provided on the motor (103), the driving shaft (105) is connected to the crushed ice box (100), a mounting frame (104) is provided on one side of the motor (103), and the motor (103) is placed in the mounting frame (104).

4. The decontamination device for a nuclear power plant according to claim 3, characterized in that: One side of the crushed refrigerator (100) is connected to a support frame (106), one side of the support frame (106) is connected to a movable seat (107), a cabinet (108) is arranged on the movable seat (107), and the crushed refrigerator (100), the high-pressure gas cylinder (300) and the motor (103) are all located in the cabinet (108).

5. The decontamination device for a nuclear power plant according to claim 4, characterized in that: A roller (109) is installed at the bottom of the movable seat (107).

6. The decontamination device for a nuclear power plant according to claim 1 or 5, characterized in that: The decontamination box (600) comprises a base (601), a circular card seat (602) arranged on the base (601), and a decontamination cover (603) connected to the circular card seat (602); a rotatable tray is installed on the base (601), and equipment that needs to be decontaminated is arranged on the rotatable tray.

7. The decontamination device for a nuclear power plant according to claim 6, characterized in that: The decontamination cover (603) is made of organic transparent glass.

8. The decontamination device for a nuclear power plant according to claim 7, characterized in that: The connecting pipe 2 (400) comprises a branch pipe 1 (401) connected to the side of the crushed refrigerator (100) and a branch pipe 2 (402) connected to the branch pipe 1 (401); One end of the branch pipe 2 (402) away from the branch pipe 1 (401) is connected to the tail end of the spray gun (500).

9. The decontamination device for a nuclear power plant according to claim 8, characterized in that: The side of the decontamination box (600) is provided with a gun insertion port (501), and the spray gun (500) is inserted into the gun insertion port (501).

10. The decontamination device for a nuclear power plant according to claim 9, characterized in that: The spray guns (500) are provided in a plurality of groups, and the gun insertion ports (501) are also provided in a plurality of groups, the number of which is the same as that of the spray guns (500).

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