Exhaust Treatment Applications

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  • Category: Air & Climate ×

  • Subcategory: Exhaust Treatment ×

Extraction of many emission sources in extensive factory premises

by Chemisch Thermische Prozesstechnik GmbH / CTP Air Pollution Control     based in Graz, AUSTRIA

CTP achieved the continuous and individual ventilation of every work station and overall compliance with statutory limits, as well as the production of usable steam as a by-product of the excess heat.

Gas monitoring instruments and systems for titanium dioxide

by Gasmet Technologies Oy     based in Helsinki, FINLAND

Titanium dioxide is the most important white pigment used in the polymer industry. It is widely used, because it efficiently scatters visible light, thereby imparting whiteness, brightness, and opacity when incorporated into a plastic product.

Emission control & air dedusting for calcination processes

by Advanced Cyclone Systems, S. A.     based in Porto, PORTUGAL

In calcination processes, solid intermediates and products are regularly handled in fine powder form. (ex: kaolin or metakaulin). There is a need to separate these very fine powders from the exhaust streams of calciners, fluid bed dryers or incinerators, often at critical temperature conditions 

Waste gas treatment for the TFT industry

by DAS Environmental Expert GmbH     based in Dresden, GERMANY

Manufacturing TFT/LCD displays requires waste gas treatment as well. Processes that produce large scale Thinfilm Transistors (TFT) on glass substrates, for instance, use Chemical Vapour Deposition – CVD – to separate the thin films onto the material. The process requires cleaning the process chamber periodically and usually employs etching with NF3. Etching of the separated thin films typically utilises CF4, SF6 and chlorinated gases, which release large amounts of waste gas mixtures.

Waste gas treatment for the semiconductor industry

by DAS Environmental Expert GmbH     based in Dresden, GERMANY

In the early 1990s no appropriate and comprehensive technical solution had been available for waste gas treatment in the semiconductor industry. Back then as well as today many industrial and research production procedures use process gases and generate waste gases. These waste gases, considered greenhouse gases, are toxic and/or highly flammable and very often pose a significant risk to production facilities and the environment. The semiconductor industry, for instance, uses perfluorocarbons, whose global warming potential is extremely high and therefore requires an efficient waste gas treatment. Combining and transporting different gases into a fab’s central waste gas system might produce highly flammable and highly explosive gaseous mixtures, which in the past has occasionally caused the total loss of entire production facilities. Particles contained within gases may also cause exhaust blockages. To eliminate these risks, process waste gases need to be treated at the “Point-of-Use” (POU) where harmful exhausts are abated immediately.

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