Paper Industry

Fabrication process 3. RECOVERY OF CHEMICALS This process, also known as kraft pulping, gives rise to a subproduct, black liquor, which contains the used chemicals and dissolved lignin. Converts wood into tiny pieces called “chips”. The digester eliminates lignin. White liquor (NaOH + Na2S) is used for this purpose, at temperatures of between 165-170 °C and a pressure of 7 Kg/cm2. The end result is pulp and traces of lignin dissolved in water. Black liquor is concentrated by evaporation and burned in a recovery boiler to generate high pressure steam. Its function is to separate impurities from...

Mechanical seals with special designs, for working with pastes and in chemically aggressive conditions. Variable requirements, depending on the machinery used: high pressures and speeds, high temperatures and vibrations. Fabrication process In paper manufacturing, the cellulose fibres are mixed with water, giving rise to dense mixtures and products that often require a seal with a design that favours the lubrication of the contact surfaces, or facilitates special assemblies (API 52, 54). 3. RECOVERY OF 2. DIGESTER 1. GRINDER MECHANICAL SEALS This process, also kno black liquor, which con Converts...

Lidering S.A.R.L. France Tel. 04 72 67 02 67 Lidering GmbH Deutschland Tel. 0211 522 890 94 S.A. Lidering N.V. Belgique-Belgie Tel. +34 93 480 44 22 Lidering Mechanical Seals, S.A. Panama Tel. 397-1572 www.lidering.com email: [email protected] iEPI INDUSTRIES family of companies Maritime Industry Water Treatment Industry Food and Beverages Industry Chemical Industry Recycling of waste Industry A Recycling of waste Industry