PTT Global Chemical Ethanol Furnace

Thailand - Gulf of Thailand

Thermal insulation

Thailand - Gulf of Thailand

When PTT's main project contractor Calderys assigned the contract for the supply and installation for the fibre lining system of the radiant walls — and roof and the transition walls and roof — of an original Daelim Enginering pyrolysis* furnace at the PTT methanol plant, onerous standards and exacting professional priorities were not only expected but clear for all to see.

Optimal thermal performance is paramount in this lucrative but safety and strategically sensitive location. Two earlier bids from competitive suppliers — Thermal Ceramics and Unifrax — were unable to meet requirements.
In the final analysis, Promat Microtherm HPI proposed an integrated solution, engineered from tested and proven methodology. This includes:

• ALSITHERM® fibre modules where fibre orientation results in thermal conductivity less than the current system, sustaining same design thickness and still reduce heat loss;

• Anchor system adapted to incorporate a sealing layer behind the modules, resulting in a “belt and braces” approach to heat sink problems caused by construction and consequential “hot spots” on the steel casing;

• Lightweight, vacuum-formed observation doors, fabricated by PROMAFORM®, to replace current insulating castable doors, and reduce heat loss by 40% in these areas.

• Installation of a MICROTHERM® panel behind the ALSITHERM® in the exacting transition section, enabling same physical thickness but measurable reduction of heat loss.

• Full engineering drawings and Bill Of Material (BOM) certification.

Taken together, all heat loss and cold face challenges PTT ethanol plant were effectively overcome by the application of the Microtherm PROMALIGHT® range of proven microporous insulation. In this particular application, the higher density alumina based insulation board PROMALIGHT®-1200 withstands peak temperatures up to 1200°C. It is a point of considerable pride and certainly worth noting this is the FIRST refurbishment of a fired heater ever awarded to a Promat company.

Complete refurbishment, achieved in May 2013, was followed by a full thermographic report produced by PTT using heat sensitive cameras. The report confirmed that Promat HPI systems fully complied to design specification on heat loss and casing plate temperatures.

Based on this and further design improvements generated by the report, Promat HPI is now the contract winner of the next five heaters at the same plant. Two will complete installation and operational tests in Q2, 2015 and the balance of the remaining three in Q4, 2015.

The value of this single biggest contract ever awarded to Promat for oil and gas heater refurbishments goes well beyond very reassuring financial bottomline considerations. It is in fact a huge step forward for Promat HPI’s visible business profile and competitive credibility, and the cause for kudos and celebration.

PTT Global Chemical is a subsidiary of PTT, Thailand’s state-owned oil and gas corporation. Publicly-listed PTT owns and operates extensive submarine gas pipelines in the Gulf of Thailand and a network of LPG terminals throughout the Kingdom. PTT is involved in electricity generation, petrochemical products, oil and gas exploration and production, and gasoline retailing businesses.

* A pyrolysis furnace takes its name from the Greek: pyro = fire, -lysis = to separate, i.e. to separate by fire/extreme heat.