Development of a water treatment plant for a rolling-mill train

• Autores: S. Martinez, I. Goicoechea
• Localización: Selected Proceedings from the 12th International Congress on Project Engineering: Saragossa, July 2008, 2009, ISBN 978-84-613-3557-2, págs. 343-355
• Idioma: inglés
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• Resumen

  • A plant of water treatment consists of an installation in which the water is treated and submitted to diverse processes depending on the industrial use to which it is destined. In case of a plant of treatment of waters proceeding from the refrigeration of a constant train of lamination, the elimination and separation of oils, filtration, refrigeration or the thickened one and dehydrated of mires they are some of the processes to which these waters surrender. In the majority of these plants, a circuit is dedicated to the direct refrigeration (water circuit of contact) and other one to the indirect refrigeration (water circuit of not contact). As the water circuit of contact it takes pollutant materials that reduce the useful life of the equipments of the rolling mill the principal aims of the plant they will be to extract these pollutant materials and to reduce the temperature of the fluid that is re-circulated to the train. In order to design the process we use a series of pre-established technical requirements, such as, for example, the increase in temperature needed to cool the fluid, the speed, flow, and pressure at specific points and the different concentrations of materials permitted in the water.

    Beside fulfilling the above mentioned requirements, one tries to optimize the process applying the following criteria:

    - To re-circulate the whole of the wealth that flows for the lines.

    - To reduce the consumption of the water.

    - To improve to the maximum the quality of the water that is re-circulated to the train.

    - To reduce the costs of maintenance, project of installation and costs of equipments.

    Using this information we will determine a water treatment process and then design and dimension the civil works. The fluid conduits will be calculated, and the equipment for pumping, filtering, cooling, extracting solids and oils will be selected, along with the instrumentation needed to control the plant.