SIMPLIFIED WET ASH ARRESTING SYSTEM OPERATION AT DARYA KHAN SUGAR MILLS

Abstract

There are number of techniques to combat the fly ash carryover with Boiler flue gas in Cane Sugar Industry. These are mainly dry Ash Collecting Cyclones, Wet Scrubbing, Electrostatic Precipitation and Wet Ash Arresting with Water Showing & Recycling. The Wet Ash Arresting System (WAAS) with water showering and recycling in a closed circuit, is the best ash arresting system for the Sugar Industry Boiler. The performance of the WAAS is improved if ash collection load is decreased with in-line installation of dry ash collecting cyclones system at primary stage. At Darya khan Sugar Mills wet ash arresting system was installed with the erection of the boiler but it was not operative since long due to certain reasons. In off season 2018, major low cost modifications were made at site and system operated with success in season 2018-19. Full detail of modification, design, erection and operation of the system is discussed in the underlined paper.