Energy Intensity Lowering in Selected Textile Process

Abstract

Energy intensity as a quantitative parameter is helpful in estimation of efficient energy use in a particular industrial process and at the same time it is the basis for proposing measures to improve energy application. In this paper the steam pressing process as a consumer of heat energy in textile industry is analysed. Flue gases waste heat is detected as valuable energy source that can be reused instead being rejected into surroundings. Two alternative options for flue gases heat recovery are proposed: combustion air preheating and boiler feed water preheating. First option resulted in natural gas saving of 7.8 % while second option gives 6.5 % natural gas saving. This is obtained by flue gases temperature lowering from 204 to 61.8 °C and 85.9 °C respectively. Lowered fuel consumption leads to better environmental compatibility of process because flue gases production is decreased from 315.84 m3/h to 291.25 m3/h and 295.35 m3/h respectively.