Coal-fired power stations generate a significant amount of fly ash, which must be safely removed from the flue gas by dust collectors. Therefore, the central task of filter media in coal-fired power stations is an efficient dust removal and the neutralisation of harmful gases. BWF Envirotec offers you filter media solutions which are designed for these tasks and matched to the individual applications.
Typical Operating Conditions:
| Cont. Temperature (°C): | 70-220°C |
| Peak Temperature (°C): | Orientation to the maximum peak temperature of the fibre polymers used |
| Dust: | Fly ash, sorption products |
| Dust Properties: | Fine, powdery, sometimes abrasive |
| Dust Source: | Dry sorption, fluidised bed firing, pulverised coal firing, scrubber, spray reactor |
| Harmful Gases: | H2O, NOx, SOx |
| Cleaning Process: | Pulse jet |
| Fuels: | Lignite, coal |
Specific Requirements for Filter Media in Coal-Fired Power Stations:
- High abrasion resistance
- High separation performance
Scrim and Fibre Types for Filter Media in Coal-Fired Power Stations:
Tailor-made needlona®-filter media made of Polyacrylonitrile homopolymer (DT)-, Polyphenylene Sulfide (PPS)-, Polyimide (PI)- and Polytetrafluoroethylene (PTFE)-fibres meet the challenges in coal-fired power stations to the highest degree. For filtration of the various fly ashes all types are also available as MPS®-filter media. The much larger filter area of the MPS®-filter media ensures that the dust is separated in a highly effective manner. Thus, under optimal operational conditions, the dust collector achieves emissions which are often far below the legally permissible limits.
For certain operating conditions, BWF Envirotec offers a special toplayer construction. In this case, the filter media is complemented with an additional fibre layer of filter active fibres. The separation properties of the filter media can be further increased with an additional CS30® or CS31® finish.
