Waste

Wet flue gas cleaning and flue gas condensation after a semi-dry system

In October 2012, Babcock & Wilcox Vølund AB supplied a wet scrubber installation for flue gas condensation and flue gas cleaning with dioxin removal to Öresundskraft's Filborna plant in Helsingborg, Sweden.

The scrubber system is installed after a semi-dry baghouse filter system. The majority of remaining acid components and dioxins in the flue gas are removed. Dioxins are removed by tower packings and droplet separators as these are made of ADIOX® material. Condensation takes place in two scrubber stages to obtain maximum energy recovery. The first stage is directly connected to the district heating system and the other stage via an absorption heat pump.

Reference brochure

Multifunctional wet ADIOX® scrubber with condensation / heat pump after a semi-dry system

Wet flue gas cleaning and flue gas condensation

In 2013 Babcock & Wilcox Vølund AB supplied a wet scrubber plant for flue gas condensation and flue gas cleaning including dioxin removal to Eksjö Energi AB.

The scrubber system is installed after a dry baghouse filter system and includes a condensation stage for energy recovery directly connected to the district heating system. The main part of remaining acid components are removed in a first scrubber stage where a concentrated water phase is brought back the combustion chamber. The dioxins are removed in tower packings and droplet separator by means of the ADIOX® material.

Semi-dry flue gas cleaning

In the fall of 2012 abcock & Wilcox Vølund AB supplied a semi-dry flue gas cleaning system to Babcock & Wilcox Vølund A/S, which had overall responsibility for delivery of the new waste boiler at Lidköping's thermal power station. The customer took over the installation in March, 2013.

The flue gases are first conditioned in a cooling tower through injection of water. Lime and activated charcoal are injected in the downstream flue gas duct before the gases are led to a bag house filter where the principal removal of dust, acid components and metals takes Place.

In 2012 Babcock & Wilcox Vølund AB supplied a wet scrubber installation for flue gas condensation and flue gas cleaning to Tekniska verken in Linköping AB, Sweden.

The scrubber is installed after a dry flue gas cleaning after three incineration lines (line 1-3). Its main task is to Clean flue gases from acid Components and to increase the energy recovery with the integrated flue gas condensation. The very efficient cleaning gives Tekniska verken a very good fuel flexibility and the assurance that the installation meets the most stringent emission requirements.

Here you can watch a film from the scrubber transport from Finland to Linköping.

Wet flue gas cleaning, flue gas condensation

In 2004, Babcock & Wilcox Vølund AB supplied two wet scrubber installations for energy recovery and flue gas cleaning with dioxin removal to Dong Energy's Måbjerg plant. The contract included upgrading the two existing scrubbers with ADIOX^® materials for dioxin removal.

The waste installation at the Måbjerg plant was required to meet the EC's new emission directive. Modification to the older installation has improved removal of hydrochloric acid (HCl) and e.g. mercury (Hg). Caustic soda (NaOH) is injected during the first stage to facilitate removal of sulfur dioxide (SO2). The majority of the hydrogen fluoride (HF) is also removed. All scrubber stages are fitted with ADIOX^® material tower packing for efficient dioxin removal. The performance test showed a dioxin removal of 99.40-99.80%. In the second stage the flue gases are cooled in a circulating water system and a significant amount of energy can be recovered.

Reference brochure

Multifunctional wet ADIOX® scrubbers with integrated energy recovery

Wet flue gas cleaning, energy recovery

In 2000 Umeå Energi AB began operating Dåva 1 – one of the world's most energy-efficient and environmentally compatible combined heat and power plants using waste as fuel. Babcock & Wilcox Vølund AB supplied flue gas cleaning, a flue gas condensation system, water treatment system, two heat pumps and a turbine. The delivery was carried out in a consortium with Svenska Von Roll, which supplied the boiler.

The combined heat and power plant processes 175,000 tonnes of household waste per year (20 tonnes per hour). Forestry residues can also be incinerated.

Flue gas cleaning takes place in a textile filter for dust and dioxin removal, followed by an acid scrubber, an alkaline scrubber and a condenser. Water is recovered from the gas, thus the process is self-sufficient in water. Energy recovery is extremely efficient, and heat efficiency is approximately 100% (compared to the fuel's effective heating value).

After a few years in operation the installation suffered dioxin memory effect problems. Götaverken Miljö supplied and installed tower packing and droplet separators in ADIOX^® material to prevent dioxin emissions from exceeding limits. 

Reference brochure

Flue gas cleaning system with energy recovery and 
ADIOX^® for dioxin memory effect removal

CUTNOX® for NOx-reduction

In 2012 Babcock & Wilcox Vølund AB supplied a CUTNOX® installation for NOx-reduction to Renova AB in Gothenburg, Sweden.

CUTNOX® is installed at boiler No 1 where two lances are installed in the rear furnace (see picture). CUTNOX® adjusts the furnace temperature and the formation of NOx is reduced due to that temperature spikes are reduced and a good remixing in the furnace is created.