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Firing systems

ERK Firing Systems

We devoloped our own bubbling fluidised bed technology and have implemented numerous combustion systems.
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Our first combustion system dates back to the 1950’s and had a 2 megawatt water-cooled inclined grate for biomass firing. Thanks to our experience with in-house water circulation, the combustion system was integrated into the boiler’s natural circulation to achieve optimal cooling of all components exposed to high temperatures.
Since the first unit, many combustion systems have been manufactured with firing capacities of up to 64 megawatts.

more than
260References

Fuels

  • coal
  • biomass
  • fuel mixtures

Working Fluids

  • steam
  • hot water
  • thermal oil
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In case one of ERK’s own combustion systems is not ideally suited for your project, we can recommend one of our licensees, as nearly every combustion system available on the market is covered by our licensee network. This also applies to the reciprocating grates, vibrating grates, circulating fluidised beds and gasification. This combined know-how places ERK among the leading fluidised bed technology provider, as independently verified.

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Technologies
We provide the following two main firing systems:
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Bubbling Fluidised Bed

2018_04_09_Firing_systems_1
more than
14References

Special features

high fuel efficiency, 

low part load operation

and lowest emissions

Largest parameters
max
55
MWth
/
110%
Load
Smallest parameters
min
0.3
MWth
/
30%
Load

Based on our experience with combustion systems ERK has developed a bubbling fluidised bed (BFB) technology capable of burning biomass and waste feedstocks, thereby achieving high fuel burnout, low NOx emissions and low part-load operation.

The combustion system is fully integrated into the boiler and can be preassembled in the workshop to minimise site work. Some units were transported to site fully assembled.

To broaden our BFB portfolio ERK has partnered with Alera on the TwinFluid® technology. TwinFluid® is complementary as it allows the use of multiple fuels, such as coal with biomass, and waste materials, such as RDF, sludges and chicken litter.

The technology permits very compact boiler systems and is based on a modular design philosophy, which enables a simple system scale up to 200 MWth.

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Fuels

  • wood
  • wood waste
  • tabacco waste
  • rice husk
  • lignite
  • fuel mixture

System suitable for

  • water tube boiler
  • hot gas heater
  • thermal oil heater
  • combi boiler
  • fire tube boiler

Working Fluids

  • steam
  • hot water
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Water-Cooled Inclined Grate

2018_04_09_Firing_Systems_2
more than
250References

Special Feature

integrated water circulation, high reliability and robust design

Largest parameters
max
64
MW
/
110%
Load
Smallest parameters
min
0,4
MW
/
35%
Load

Our experience with water-cooled inclined grates goes back decades and the technology has proven to be effective for many biomass and coal feedstocks. As the name indicates, the grate is water-cooled and the water circulation is incorporated into the boiler’s water circulation. The grate is a membrane wall construction with air nozzles for primary air supply. The angle of the grate is adapted to the fuel specification. Until now, all installations had a fixed grate angle and we are now commercializing an improved version where we can adjust the grate angle during operation to use a variety of fuels.

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Fuels

  • wood
  • bark
  • palm waste
  • bagasse
  • peanut shells
  • rice husk
  • sunflower husk
  • hard coal
  • lignite
  • waste materials
  • fuel mixtures

System suitable for

  • water tube boiler
  • fire tube boiler
  • combi boiler
  • thermal oil heater
  • hot gas generator

Working Fluids

  • hot water
  • steam
  • thermal oil
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