06 OCT 2011
Flat bottom Spray Dryer Absorber at Bayuquan Sinter in China
Flat bottom Spray Dryer Absorber at Bayuquan Sinter in China

Boosted by the rising Chinese demand for Flue Gas Desulphurization technology in general and GEA Niro’s Spray Drying Absorption process in particular, a new design with a flat bottom absorber chamber has recently been introduced to the Chinese market.

As the Spray Dryer Absorber unit sizes are growing bigger, the potential savings for a flat bottom absorber chamber vs. a traditional absorber chamber with a 60° bottom cone increase. Earlier this year, the first flat bottom Spray Dryer Absorber chamber in the world was commissioned at Ansteel’s 360 m2 sinter plant in Liaoning, China. Here, the Spray Dryer Absorber cleans the off gas of the sinter plant from acidic pollutants, primarily SO2, and dust.

Traditional Spray Dryer Absorber with bottom<br> cone at Angang Sinter in China
Traditional Spray Dryer Absorber with bottom
cone at Angang Sinter in China
The flat bottom chamber is approx. 20 meters lower than a traditional chamber with the same diameter. The height difference of the two spray dryer absorbers is evident in the shown images. The savings in construction steel alone have amounted to more than 100 tons and there are numerous side effects as well, such as reduced operating costs and easier maintenance. The overall performance of the flat bottom chamber does not differ from that of a traditional chamber.

As of October 2011, four flat bottom spray dryer absorbers are in operation or under construction in China.

The development of the flat bottom spray dryer absorber chamber (patent pending) has to a great extent taken place with the aid of CFD modeling and the expertise of the GEA Niro Research & Development Center.

Read more about GEA Niro’s Spray Dryer Absorbers.