Design Analysis of Variable Capacity Reverse Air Bag House | |
---|---|
( Volume 3 Issue 9,September 2017 ) OPEN ACCESS | |
Author(s): | |
Thakeshwar Prasad Verma, Mukesh Kumar Verma, Devvrat Verma, Sandeep Agrawal | |
Abstract: | |
In a present day the many industries such as cement, asphalt, sugar, power plants, steel mills, pharmaceutical producers, food manufacturers, chemical producers and other industrial companies handles billion tones of dust each year and does a good job in keeping dust out of the atmosphere. Over the years, the allowable dust emissions from these industries have become lower and lower. Particulate Matter (PM) has impacts on climate and it also adversely affects the human health. Currently using process emission control device in Cement Plant include various types of Bag Houses, Bag Filters and Electro Static Precipitator (ESP).The cement sector has been rapidly growing at a rate over 8% and it is expected to grow further. In view of the growth rate it is expected that more & more cement plants would come up and the existing plants may expand their capacities through up gradation or modernization. Usage of more fly ash, slag is also increasing to create additional production capacity. In order to meet the increasing demand, most cement plants are making efforts to achieve higher production levels, at times by stretching the existing production facilities and by adding additional capacities. On the other hand, the environmental concerns in terms of emissions to atmosphere are also growing. Most cement plants have made considerable efforts in controlling the stack emissions using most efficient control systems like RABH bag filters and ESP, and these plants generally meet the environmental regulations for stack emissions. However, fugitive emissions from various sources in cement plants still remain an area of concern. There have been environmental regulations in terms of preventing/controlling fugitive emissions. Many cement plants though have taken initiatives in controlling fugitive emissions with varying degree of effectiveness. However in general more efforts are required in this area to satisfactorily control the fugitive emissions on sustainable basis. The Indian cement industry is at present going through rapid growth in production and simultaneously improving the de-dusting systems to meet lower emission levels. High cement demand forecasts dictated a very Raw Mill and Short Kiln outage for tie-in of the new collector. This article provides an over view of key issues and considerations that lead to successful installation and minimized loss of plant operating time. Typically Indian cement industries had predominantly used Electrostatic Precipitator (ESP) till about 1985. Now most of the new plants are opting for Bag House for cement Raw Mill and kiln de-dusting over ESP. Over the last few years, imported membrane type filter bags have become cheaper due to lower import duty and favorable exchange rate. At the same time, the steel prices have more than doubled. In today’s situation, membrane filter bags offer lower Capital as well as lower operating cost compared to conventional filter bags. Detailed cost analysis and references for both Reverse Air Bag House and Pulse Jet and type of filter bags is described in details in this article. Anyone involved in the selection of de-dusting equipment for cement plant would find the article very useful. |
|
Paper Statistics: | Total View : 563 | Downloads : 554 | Page No: 6-9 | |
Cite this Article: | Click here to get all Styles of Citation using DOI of the article. |