Fans for ClO2
Paper is a material made from cellulose fibers that are obtained by chemical and mechanical processes .
The main source of the cellulose is wood. Its chemical composition is highly variable and is composed primarily of cellulose, lignin , hemicellulose, and 5% to 10% of other materials. The lignin polymer is the responsible of the typical brown color of pulp paper.
Depending on the chosen final product pulp follows different manufacturing processes. In the case of white paper a bleaching process in required to remove off the hemicellulose and the lignine , producing minimal physical damage to the cellulose fiber.
Bleaching methods used are the ECF (Elemental Chlorine free ) and TCF (Totally Chlorine Free).
One of the most important changes in the process of pulp bleaching was the substitution of Cl2 with ClO2, chlorine dioxide . Such change was essential in reducing the amount and type of organochlorines formed and produced and the disappearance of dioxins and tetrachloride furans in the effluents.
Industrial production of chlorine dioxide is generally based on processes to reduce the NaCl in NaClO3 in H2SO4 solutions. However, to minimize risks of transport and for being chemically stable , is produced on site.
The chlorine dioxide gas is transported to an absorption tower where it is dissolved in cold water to produce the bleach solution of aqueous chlorine dioxide .
As chlorine dioxide is an element highly toxic and corrosive, facilities must have safety systems designed specially for the operation and to avoid risk of exposure to this fluid in case of leakage.
Also the choice of materials is critical to ensure the life of the equipment.
Tecnium supplies centrifugal fans for handling chlorine dioxide being our clients from companies providing installations to the end user’s paper mills.
The fans are available in materials specially adapted to process conditions and with sealing systems to prevent leakage of polluted gases into the atmosphere.
Give us your contact details and we will advise you on the best solution for your application.
Tecnium obtains the Innovative Company seal
Tecnium has recently obtained the Innovative Company seal awarded by the Ministry of Science and Innovation. This award recognizes the company's trajectory in the field of R+D+i, something that has characterized us throughout our [...]
IFAT 2022 Exhibition in Munich
We are just back from IFAT 2022 exhibition in Munich, the leading trade fare for Environmental Technologies. We are very happy with the results and happy to see that step by step [...]
Corrosion Resistant Equipment
Corrosion resistant plastic equipment in: FRP, thermoplastics and dual laminated.