energy solutions

since 1929

Eckrohr Boilers are always ahead when it comes to techno-economical solutions.

More than 6,000 boilers in operation and support from basic design to detail engineering

Complete energy solutions with highest efficiencies

Marine boilers – compact and high steam purity

Complete engineering services from design to simulation

CSP-system design, absorber tubes and back-up boilers (photomontage)

The right solution for each size

Travelling grates

Travelling grate firing systems can be combined with steam generators, hot water heaters as well as thermal oil heaters. For economic reasons, the maximum combustion capacity is set to 80MW. This can be increased to 120MW by means of spreader feeding. It is even possible to incinerate highly calorific hard coal with travelling grates, as long as its ashes do not form a lot of slag. The slag would immediately jam and cause wear to functional elements of the grate. In order to achieve sufficiently low exposure times, the maximum particle size of 30mm should not be exceeded. If possible, small-grained fractions should be pushed, not thrown, onto the grate.

Other advantages

  • only low dust percentages in the flue gas due to low primary air velocities
  • easy to use
  • good burnout of the fuel
  • easy to maintain; the individual grate links can also be accessed from outside the combustion chamber
  • highly reliable
  • the exposure time of the fuel in the combustion chamber can be regulated by the grate velocity
  • coal with a higher tendency to cake can be used with tipping grates

Water-cooled grates

Due to the functional separation of combustion air feed and grate cooling this type of grate is especially suited for highly calorific and wet fuels (hard coal, garbage, biomass, etc.). The combustion air feed is exclusively used for reaction engineering purposes. The grate is cooled by tubes containing water. The discharged heat is integrated downstream in the boiler system to generate steam, hot water or thermal oil.

Other advantages

  • it is possible to reduce set a low emission level
  • suited to a broad range of fuels, including very wet fuels
  • high combustion capacities can be achieved (the current limit is 150MW)
  • good fuel burnout
  • the grate can be incorporated into the water circulation system
  • reduction of caking due to water cooling
  • robust and low-cost design
  • little wear and tear

Fluidised bed combustion systems

Stationary fluidised bed combustion systems are universally applicable due to their fuel-oriented versatility using slurry, waste and hard coal, and the possibility of incinerating various fuels at the same time. Fluidised bed combustion systems have a simpler design and are thus low cost. Using fluidised beds is more difficult than operating a grate system as a result of trying to keeping emissions to a minimum. ERK has experience with plants with combustion capacities of up to 75MW.

Other advantages

  • very broad range of fuels
  • very well suited to wet fuels
  • simultaneous incineration of various materials of equal density
  • very low NOx, SO2 and other pollution from contaminants in the flue gas
  • very good burnout
  • reduced boiler volume in comparison to other types of design
  • fast load changes are possible
  • homogeneous temperature distribution in the entire fluidised bed
  • easily available

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