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On-line ultrasonic decontamination method and device thereof

A decontamination device, ultrasonic technology, applied in the field of online decontamination of metal containers or pipeline inner surface, ultrasonic device field, can solve the risk of increasing the secondary pollution of the outer surface of equipment components, increasing the risk of radioactive pollutant diffusion, complex and huge structure and other issues, to reduce the risk of radioactive pollution spread, enhance safety and reliability, and enhance the effect of decontamination

Inactive Publication Date: 2009-12-16
苏婕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1). Contaminated equipment components need to be dismantled and dismantled before decontamination can be performed. However, dismantling and dismantling is an open operation method, which will greatly increase the risk of radioactive pollutants spreading
[0006] 2). The structure of the overall process device for decontamination is complex and huge
[0007] 3). Decontamination produces a large amount of secondary waste
[0008] 4). When the equipment parts with contaminated inner surface are decontaminated by this device, it may increase the risk of secondary pollution on the outer surface of the equipment parts

Method used

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  • On-line ultrasonic decontamination method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The structure of the online ultrasonic decontamination device is as follows: figure 1 , including an ultrasonic generator 1 and a transducer 3, the ultrasonic generator 1 is a vehicle-mounted movable type, the ultrasonic generator 1 and the transducer 3 are connected by a wire 2, and a flexible connection is made at the front end of the transducer 3 Replacement special-shaped horn 5, the front end surface of the special-shaped horn 5 has a curvature matching the shape of the part to be decontaminated.

[0038] A fixing seat 4 is fixedly installed on the transducer 3, and a fastening device 6 is movably connected to the fixing seat 4 for pressing the special-shaped horn 5 on the outer surface of the part to be decontaminated.

Embodiment 2

[0040] For the removal of radioactive contamination on the inner surface of carbon steel containers or pipelines:

[0041] First, fill the parts to be decontaminated with deionized water (if possible, the water temperature should be controlled at 50-80°C), select the hot spots of the parts to be decontaminated, and use the fastening device to connect the ultrasonic transducer and the special-shaped amplitude The rod is tightly fixed on the outer surface of the part to be decontaminated, start the ultrasonic generator, control the ultrasonic frequency to 20-40kHz, and the power density to 10-30W / cm 2 , through the outer wall of the container to form cavitation and acceleration effects in the deionized water in the container, dissolve the radioactive pollutants on the inner surface of the parts to be decontaminated into the clean water, turn off the ultrasonic wave, drain the waste liquid, and rinse the container with clean water for 0.5-1 Hour.

Embodiment 3

[0043] For the removal of radioactive contamination on the inner surface of online stainless steel containers or pipelines:

[0044] First, fill the parts to be decontaminated with oxidative decontamination solution (1% potassium permanganate and 2% sodium hydroxide aqueous solution, the water temperature is better controlled at 50-80°C), select the hot spots of the parts to be decontaminated, and pass The fastening device tightly fixes the ultrasonic transducer and the special-shaped horn on the outer surface of the part to be decontaminated, starts the ultrasonic generator, controls the ultrasonic frequency to 20-40kHz, and the power density to 10-30W / cm 2 , form cavitation and acceleration effects in the solution in the container through the outer wall of the container, dissolve the radioactive pollution deposited on the inner surface of the component into the solution, turn off the ultrasonic wave, drain the waste liquid, and rinse the container with clean water for 0.5 to ...

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Abstract

The invention relates to an on-line ultrasonic decontamination method, which comprises the following steps that: decontamination media fill up a container or a pipeline which needs to be decontaminated; an ultrasonic transducer is fixedly arranged on an external surface; and under the action of ultrasonic, contaminants in the container or the pipeline which needs to be decontaminated enter the decontamination media and are discharged from the container or the pipeline following the decontamination media. An on-line ultrasonic decontamination device used by the decontamination method comprises an ultrasonic generator and the ultrasonic transducer connected with the ultrasonic generator through a wire, wherein the front end of the ultrasonic transducer is movably connected with a replaceable special amplitude transformer; and the front end of the special amplitude transformer has a curvature matched with that of the external form of a component which needs to be decontaminated. The on-line ultrasonic decontamination method solves the problem that the prior ultrasonic cannot decontaminate internal surfaces of the large-scale equipment and the pipeline in an on-line mode, eliminates the operation procedures of the dismantling and disassembly of contaminated equipment, reduces a risk of pollution diffusion, reduces the amount of secondary waste generation, shortens an overhauling construction period and improves operation efficiency.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic decontamination, and in particular relates to a method for online decontamination of metal containers or pipeline inner surfaces and an ultrasonic device suitable for the method. Background technique [0002] In the equipment of nuclear industry or other industries, there are many containers or pipelines seriously polluted by radioactive elements. Most of these radioactive pollutants accumulate on the inner surface of the equipment cavity, which will form a strong source of external radiation to the maintenance personnel during the maintenance process; in addition , due to equipment leakage or open operation, there is also a risk of radioactive pollution spreading. Therefore, in order to protect maintenance personnel and protect the environment, it is necessary to remove such pollution. [0003] Ultrasonic wave is a kind of alternating sound pressure, which can make the liquid appear sparse st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/032B08B9/08
Inventor 崔慧玲袁志江邬强
Owner 苏婕
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