Tailor-made extraction and filtering units against aerosols

During processing of workpieces in a vertical eroding machine, emissions escape from the eroding bath which harm the health of staff as well as impair safety at the work place. To rule out these risks, the company needs an effective extraction and filtering system which does not disturb the work process.

A vertical eroding machine erodes material from special components in a special fluid (dielectric). Hereby, material is melted out at high temperatures, the vapours of which rise up out of the immersion bath as eroding mist.

This mist consists of health-hazardous aerosols and presents a safety-relevant risk for the machine personnel and staff standing nearby.
Due to the high degree of material removal, large emission quantities occur which can only be eliminated completely with the appropriate separation factors. The limit values (MAC) of the materials can often be within the critical range. Handling of electrical voltage additionally presents the risk of explosion so that the explosion limits also need to be considered in the planning.

• High emission quantities demand high separation factors of the filters.
• The limit values (MAC) of the materials are often critical.
• Explosion limits (LEL = lower explosive limit of the materials according to the ATEX directive) must be observed as well as the appropriate fire safety measures.

The customer's first contact is already with the engineers of Fuchs Umwelttechnik. The focus here is on sound advice which takes all specific conditions and requirements into consideration. Project planning begins already here, where the specialist engineers of Fuchs Umwelttechnik develop the requirement specification for the optimum extraction and filtering unit together with the customer.

• In order to find the best solution for eroding mist extraction, the first talks take place directly between the customer and a specialist engineer from Fuchs Umwelttechnik.
• Project planning: The analysis of all customer requirements as well as the existing working and space conditions are the prerequisites for the tailor-made extraction system.
• Examination of the exact emission quantities and the optimum capture parameters are indispensable for our engineers for developing the most suitable application.

Based on the information acquired from the customer, the engineers from Fuchs Umwelttechnik design the perfectly adapted extraction solution: Specifically aimed at the eroding machine, the specially adapted capture, the efficient transport and the corresponding extraction and filtering unit integrate smoothly into the existing system.
Multi-stage filter technologies are used, adapted to the bath size of the vertical eroding machine, the high pollutant quantities and the corresponding MAC limits. Larger particle concentrations are pre-separated by large metal mesh filters and expansion stages. HEPA filters are used for extremely fine aerosols. Activated carbon looks after solvent residues and minimises odour pollution.

In detail:

 

1. Complete capture: Direct extraction and the special flow control of the extraction unit ensure direct capture of all vapours.
   
   
2. Pre-separation: Large metal mesh filters and expansion stages for pre-separation of larger concentrations.
   
   
3. Multi-stage filtering: Multi-stage filter technologies in the filtering unit eliminate the large pollutant quantities, adapted to the respective MAC limits.
   
   
4. Particulate filtering: HEPA filters as policing filters for filtering extremely fine aerosols.
   
   
5. Activated carbon filtering: Gas adsorption on activated carbon to remove solvent residues from the air stream and minimise odour pollution.
   
   
6. Energy efficiency as a cost saver: The intelligent flow control reduces the energy consumption of the suction blower and therefore sustainably saves running costs.
   
   
7. Intelligent control: The extraction and filtering unit communicates directly with the laser via the integrated interface for trouble-free extraction.
   
   
8. Space-saving behind the scenes: The compact design allows the extraction and filtering unit to be operated without disturbing the process.

Fuchs Umwelttechnik supplies the made-to-measure eroding mist extraction system with technical competence and customer orientation. The customer can now remove released vapours and their aerosols from the air stream with our development. The different filter systems in the filtering unit reliably separate all pollutants. The cleaned air is then fed back into the environment. This modern extraction and filtering unit therefore contributes not only to protecting the health of the staff but also improves the process safety and prolongs the machine service life.