Gas scrubbers for aggressive media in India
Location: India
Project Date: 2016
Product: ECTFE sheets, pipes and welding rods
Medium: Industrial exhaust gases
ECTFE Sheets, Pipes and Welding Rods supplied by AGRU.
Hydrogen bromide, sodium hydroxide, and sulfuric acid are extremely aggressive chemicals, which are formed during the condensation of certain industrial exhaust gases. AGRU delivered semifinished products made from the partially fluorinated and thus highly resistant polymer ECTFE for a well-known chemical processing company in India.
As a system supplier, AGRU was able to provide all the necessary components.
Due to the tight schedule, all products were sent by airfreight to the Indian fabricator J.R. FIBREGLASS INDUSTRIES PVT. LTD., who manufactured gas scrubbers and drying towers by applying the dual-laminate construction method.
For this purpose, the equipments made from glass fibre-reinforced plastic (GRP) were to be lined with the chemically resistant ECTFE Sheets produced by AGRU. In total, 65 m² of glass fabric backed ECTFE sheets, 430 metres of ECTFE pipes, and 32 kgs of ECTFE welding rod were supplied.
Specifically for alkaline solutions (like NaOH), ECTFE shows an excellent chemical resistance in comparison to other partially fluorinated materials (e.g. PVDF). The material can also withstand 98% sulfuric acid at a temperature of 60 °C, to which it´s being exposed in the drying tower.
Due to excellent support by AGRU's Indian representatives (AGRU India and SHREERAM POLYMERS) in combination with the technical support from AGRU Austria, the customer had been convinced of the ECTFE system solution. As a system supplier, AGRU were able to provide all the necessary parts without any delay, as entire materials had been shipped via air freight. This contributed to the quick and successful commissioning of these equipments and piping.
Advantages of AGRU fluoroplastics for extreme applications
Due to their high chemical resistance and broad operating temperature range, the fluoroplastics PVDF, ECTFE, FEP and PFA processed by AGRU are ideal for high-end applications in apparatus construction and plant engineering. The fluoroplastics are characterised by the following properties:
- Very high chemical resistance
- Outstanding temperature stability between -200 °C and +260 °C
- Very good weldability and thermoformability
- Good anti-adhesive qualities due to extremely low surface tension
