Chemical Industry

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Colour filtration with FG automatic filter AF 133

Process optimization: Automatic for sure. For the production of paints, our customer relies on FG automatic filters. In the chemical industry, they filter low- to high-viscosity products particularly efficiently and reliably – in 24-hour continuous operation. The compact automatic filters from FG Industrial can be aligned particularly variably to the strict requirements in production. Compliance with the various ATEX zones, must be taken into account in the selection of machines and their components. Toxic gases force the plant operators to change the filter bag only while wearing breathing masks. Due to these difficult working conditions, a filter system was needed that could perform filter cleaning automatically without the use of filter aids.

Challenge

The focus is on the removal of metal particles and gel plugs from solvent-based resin varnishes. The separation limit was set at

  • Reduction of paint losses and manpower
  • Use in ATEX zone 1 possible
  • Completely made of stainless steel (V4A)
  • Shortening of batch processing times
  • Use of filter aids

Product information

  • semi-finished product
  • Highly filled with titanium dioxide
  • On nitrocellulose basis
  • Flow rate: ~5m³/h
  • Operating temperature: 50°C
  • Viscosity: approx. 335mPa/s at shear rate 10001/s

Solution statement

After a comprehensive requirements analysis and a one-year test run, the customer decided on the recommendation of Filtration Group staff to install an AF 133 automatic filter with filter coil and segment cleaning system with external pressure. This made it possible to replace the previous bag filter system, which could only be maintained with a great deal of work and expense. Thanks to the modular design of the automatic filter, it was possible to develop a custom-fit solution for the customer. In addition, the requirements of the various ATEX zones could be met without any problems, so that nothing stood in the way of its use. For the future, it is planned to use 8 more automatic filters in the customer’s plant.

Customer value

  • Lead time has increased four times in comparison to bag filters
  • Process reliability thanks to the efficient filter cleaning
  • Effective segmentally cleaning process of the filter with a high backflush pulse
  • Protection of the maintenance workers because of the elimination of toxic gases
  • No expensive process downtimes due to maintenance works
  • Protection of the environment, thanks to the avoidance of waste

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