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Tecniplas extends life of a composite equipment used in paper mill by 50%

News International-French

18 Nov 2020

One of the biggest advantages of composites FRP (Fiberglass Reinforced Plastic) is versatility. Not only for design, but also for allowing the combination of different types and quantities of raw materials.

Tecniplas extends life of a composite equipment used in paper mill by 50% - With a height of 42 m, the tower was transported in two sections and assembled in the field

Tecniplas extends life of a composite equipment used in paper mill by 50% - With a height of 42 m, the tower was transported in two sections and assembled in the field

Brazilian tanks manufacturer and special FRP equipment, Tecniplas took advantage of this characteristic and developed an equipment for a paper mill whose useful life was extended by 50%.

It is an up flow tower used in the pulp bleaching process, explains Luís Gustavo Rossi, director of Tecniplas:

“The customer operated this type of equipment for a decade. However, in the last five years of use, some structural reforms were necessary, due to the high aggressiveness of the environment.”

Tecniplas extends life of a composite equipment used in paper mill by 50% - Up flow tower: corrosive fluids and high process temperature
In addition to working with highly corrosive fluids, the tower operates at 70°C.

With the support of the resin manufacturer INEOS Composites, Tecniplas' engineering department redid the structural calculations based on the ASME-RTP1 standard and taking into account a 144 km/h wind load. With a diameter of 2,220 mm, the tower is 42 m in height, with two sections of 21 m each mounted in the field.

The director of Tecniplas calculates:

“After the first five years in operation, we verified a corrosion factor of about 1 mm per year.”

Then, the company considered in the lamination plan of the new tower 9 strand mats of 450 g/m² for the chemical barrier. In addition, all the equipment – liner, chemical barrier and structure – was produced with Derakane Signia 411 ester-vinyl resin.

Thanks to this new combination of raw materials, the new up flow tower is able to operate for 15 years, without the need for maintenance interruptions.

Rossi concludes:

“We were able to meet customer demand in a relatively simple way and 100% based on technical standards.”