Integrated Laser Suction Assembly for Low-Emission Asbestos Removal
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Solution Overview
Problem
Existing methods for removing asbestos-containing material cover layers from metallic surfaces do not effectively maintain low asbestos fiber concentrations, failing to meet the requirements for low-emission methods as defined by TRGS 519, which stipulate an average concentration below 10,000 fibers/m3.
Innovation Solution
A cleaning laser assembly comprising a Nd: YAG solid-state laser emitting high-power laser light and a suction device with a suction opening, where the laser vaporizes the cover layer, and the suction device collects the released asbestos-containing material, aided by a HEPA filter and control device for optimized suction flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional methods are used to remove asbestos-containing material cover layers, then the removal process can be performed, but the asbestos fiber concentration exceeds the acceptance limit of 10,000 fibers/m3
Solution Approach 1:
The patent combines the laser cleaning system with a suction device into an integrated assembly. The suction device is positioned adjacent to the laser optic, allowing simultaneous vaporization of the cover layer and immediate extraction of released asbestos-containing materials. This merging eliminates the need for separate removal and extraction operations, maintaining low asbestos fiber concentrations while achieving efficient removal.
Solution Approach 2:
The suction device acts as an intermediary between the laser vaporization process and the work environment. By positioning the suction opening close to the laser optic, the system captures asbestos-containing materials at the source before they can disperse into the workplace atmosphere, thus maintaining fiber concentrations below 10,000 fibers/m3.
2Device complexity
If the suction opening is positioned far from the cleaning laser, then the device complexity is reduced, but the asbestos-containing material cannot be effectively collected
Solution Approach 1:
The suction device and cleaning laser are merged into a single integrated assembly with the suction opening positioned adjacent to the laser optic. This close integration ensures that the suction opening is optimally positioned to capture released materials without requiring complex positioning mechanisms or additional support structures, thereby maintaining low device complexity while maximizing collection effectiveness.
3Productivity
If high power density is used for laser cleaning, then the cleaning speed increases, but more asbestos fibers are released into the environment
Solution Approach 1:
The patent converts the harmful effect of high power density laser cleaning (which releases more asbestos fibers) into a benefit by simultaneously using the suction device to capture these released fibers. The suction device is positioned to exploit the upward flow of vaporized material, efficiently collecting asbestos-containing materials that would otherwise disperse into the environment. This allows the use of high power density for fast cleaning while maintaining low asbestos fiber concentrations.
Solution Approach 2:
The suction device operates continuously throughout the laser cleaning process, maintaining constant extraction of asbestos-containing materials. This continuous action ensures that even at high cleaning speeds where more fibers are released, the concentration in the work environment remains below 10,000 fibers/m3 through uninterrupted removal of released materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves a low-emission process that maintains an asbestos fiber concentration below 10,000 fibers/m3, ensuring safe and efficient removal of asbestos-containing materials while adhering to regulatory standards.
Implementation Method 1
the cover layer of the metallic surface can be removed by the laser light emitted by the laser optic, so that the asbestos-containing material can be at least partially released
Implementation Method 2
the removal of the cover layer means that the laser light emitted by the laser optics vaporizes and/or burns and/or blasts the cover layer of the metallic surface
Implementation Method 3
the suction opening is arranged adjacent to the cleaning laser so that the removed cover layer can be sucked in together with the released asbestos-containing material through the suction opening into the suction device
Implementation Method 4
aided by a HEPA filter and control device for optimized suction flow
Data Source
AI summary
A cleaning laser assembly and a method for removing asbestos-containing material cover layer from metallic surfaces. The cleaning laser assembly includes a cleaning laser that emits a laser beam and a suction device that has a auction opening.