Emission Control
Product Recovery
  • Schemes
  • Solutions
  • Case Studies
  • References

Biomass and Coal Combustion

Burning biomass and other common methods of coal combustion lead to polluting the surroundings. Whether it is coal biomass or its biofuels: both harm the environment and human health by releasing particulate matter to the atmosphere. These processes occur in high temperature exhaust streams such as biomass or coal boilers, heaters used in the industry and in power plants. 
 
Ordinary arrangements, such as dedusters or multicyclones, are inadequate due to their low efficiency for small particles under 10µm in order to guarantee emission control.

Meeting emission limits usually requires an additional investment in a final stage deduster – an issue we acknowledge and tackled in it’s beginning stages. Therefore we need to point out the problems of existing particular traps on the market, so we can fulfill the client’s needs:
  • While being very efficient dedusters, bag filters require regular cleaning and new filter elements. For that reason they are considered very high maintenance. Glowing biomass and coal combustion particles damage filter elements, which results in an immediate increase of their emissions. Solving this problem means spending money and production downtime.
  • Electrostatic precipitators (ESPs) are very effective for a given range of dust resistivity. Temperature increases can lead ESPs to drop efficiency and resistivity. Furthermore, the cost of retrofitting an ESP or process changes are financially out of reach for many companies.
  • Venturi scrubbers can be a good alternative for end stage dedusters only if a costly infrastructure is given: When being unable to treat liquid effluent, Venturi scrubbers’ potential gets cut due to secondary wet pollution.
Given these specifics and difficulties, a highly efficient final dedusting system at a reasonable price is needed. It must be robust enough to operate for several years without significant maintenance or operating costs and avoiding production downtime.