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Flue gas cleaning

Customised flue gas cleaning – Eco-friendly and economical

The innovative developments and improvements we continually create are the product of several decades of expertise in the field of extraction and dedusting plants as well as exhaust gas and flue gas cleaning. Particularly when it comes to flue gas cleaning in the demanding area of bio-based fuels, our new solutions set benchmarks for technology.

Scheuch plants easily cope with stricter environmental demands as their emissions are considerably below legal limits. These plants are able to process between a few thousand and several hundred thousand cubic metres of flue gas per hour.

our solutions


For simple dedusting and pre-separation

Cyclones such as spark and rotary separators, as well as tangential and axial cyclone systems, act as pre-separators and today, due to their limited degree of separation and for safety and economic reasons, they are primarily combined with additional dedusting systems such as electrostatic precipitators or bag filters.




For the dry separation of dusts and gases

The multi-cyclone is used for the dry separation of dusts and gases. It consists of a specified number of separating elements that are mounted in a common housing and is used as a separator or pre-separator depending on the particular application - for air quantities from 800 Am3/h to 400,000 Am3/h. If greater air quantities are required, several multicyclones can be used in parallel - e.g. 2x400,000 Am³/h.

Electrostatic precipitators


For reliable particulate control

Scheuch electrostatic precipitators are an efficient, beautifully engineered solution for particulate control in biomass-fuelled boiler plants. They can be installed in any application that uses wood and wood waste, bark and so on.Electrostatic precipitators are exclusively used for dedusting clean gas dust loads of up to 10 mg/Nm³. With up to three electrical fields installed in series, it is possible to achieve degrees of separation of as much as 99% and above. Their real standout feature is their robust design, which takes account of operational modes and fuel fluctuations in practice. Operators particularly value their excellent accessibility, which allows maintenance and inspection to be performed with ease.

Fabric filters


Outstanding cleaning performance combined with an excellent degree of separation 

Due to their excellent filtration properties, fabric filter systems are ideally suited to separating fine dust up to a guaranteed value of < 5 mg/Nm³, and in combination with sorptive processes for reducing other contaminants. The following factors determine the quality of the filter bag material used:

  • Gas composition
  • Operating temperature
  • Dust loading
  • Filter surface loading
  • Type of fuel
  • Mode of operation

Scheuch offers fabric filters in the form of compact units as well as single-chamber and multi-chamber filter systems with the patented Scheuch IMPULS cleaning system, depending on plant size.

Dry sorption


Proprietary developments for separating acidic noxious gases and other gaseous substances

Dry sorption

  • with hydrated lime
  • with sodium bicarbonate

Conditioned dry sorption

  • with a gas conditioning tower
  • with direct humidification of the recirculated material

When selecting the process, the resources and disposal costs as well as the expenditure required for spare parts and maintenance must be considered in the economic feasibility analysis.

Conditioned sorption


Proprietary developments for separating acidic noxious gases and other gaseous substances

Fluidised bed processes, which operate according to the principle of conditioned dry sorption, have increasingly been used for purifying flue gases for a number of years.

In the process of conditioned dry sorption with a gas conditioning tower, water is injected in order to cool the exhaust gas to a temperature of < 160 °C so that contaminant sorption can take place – if Ca(OH)2 is being used, 145 - 140 °C is ideal – and the flue gas humidity is raised as required to improve reaction conditions.

Direct conditioning of the recirculated material is achieved by applying water to the recirculated material for the purpose of self-reactivation. Conditioned sorption produces a significant improvement in the removal of acidic exhaust gases.


Klaus Emprechtinger
Head of Sales Energy & Metals Tel.: +43 7752 905-5369
Fax.: +43 7752 905-65369

Scheuch GmbH, Weierfing 68, A-4971 Aurolzmünster, Tel.: +43 77 52 905-0, Fax: -65000, E-Mail:

We provide systems for maintaining clean air

Innovative air and environmental technology for industrial applications has been Scheuch‘s stock in trade for 50 years now. Whether the solutions involve extraction, dedusting, conveying, flue gas purification or plant manufacturing, Scheuch is a leading expert with a pole position on the market in numerous sectors, and offers its customers application-specific, high-quality solutions to their air and environmental technology issues.