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04-15-2014

Polyphenylene Sulfide (PPS)

Avoiding Environmental Pollution

Substituting metals by the PPS high performance plastic inside the water distributor of a heat exchanger prevents aluminum and heavy metal ions from depositing in the water circuit (figure: Celanese)

Its sophisticated characteristics make the polyphenylene sulfide (PPS) high-performance plastic suited to resist high temperatures. Supplied by Celanese GmbH in Sulzbach, this material is therefore applied in the Bomat Profitherm heat exchanger of Bomat Heiztechnik GmbH in Überlingen, both Germany, in its complex water-bearing casing components (water distributor) and its side flanges. The heat transfer pipes consist of ceramics. Thanks to this material combination Bomat has been able to develop a heat exchanger that is metal-free in its exhaust section.

With high-alloy steels and aluminum eliminated from the exhaust section, the condensed acid smoke fume is unable to solve metal ions (mainly heavy metals such as nickel and chrome). All types of heating units remove the condensed smoke fume via the conventional waste water circuit, and this is how the new technique makes sure aluminum and heavy metal ions do not reach the water circuit. It prevents additional environmental pollution from heavy metals. For the operators of heating units and block heating stations, this means: Not only do they obtain significantly more energy out of their fuels and protect natural resources. They also help the environment by reducing heavy metal deposition.

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