AN IMPROVED DESIGN FOR AERODYNAMICS AND HIGHER PRODUCTIVITY FOR TUNNEL KILN USED IN WHITE WARE INDUSTRY.

摘要

A tunnel kiln for white ware industries adapted for circulation of products of combustion from latter half of its cooling zone to the pre heating zone comprising two horizontal hot air suction headers, each suction header operatively connected to the kiln at cooling zone, said horizontal headers connected to a main header though an inverted U shaped pipe assembly to a horizontal pipe reaching right upto the end of pre heating zone where it is connected to an inverted U shaped pipe assembly which again connects to two numbers of horizontal headers disposed slightly above the top of the moving trolley and lower portion of the products to be heated , such that uniform heating of product at all depth of stack on trolley is ensured by favoured supply of products of combustion (hot gases) from the cooling zone to the pre heating zone. Said tunnel kiln providing air ejector means and a chimney means, for creating desired draft; air-fuel ratio optimized for optimum heat availability, means to improve air/flue circulation for better convective heat transfer, enabling efficient heating and avoiding direct heating of flame over product ensuring improved quality at less cost. [IN-KOL-2008-00136A]