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PULSE JET BAG FILTER ( ON/ OFF LINE )

7A BRIEF INTRODUCTION

SEIPL’s Bag Filter is a fabric filter with fully automatic bag cleaning by compressed air pulses. It serves for the dry separation of dust from exhaust air or waste gas. The SEIPL’s Bag Filters are vividly useable in the Sponge Iron Industries, as these industries have havoc problem for the air pollution. There are two types of Bag Filters available ON LINE and OFF LINE Bag Filters. They differ due to some of their unique characteristics; those are discussed late for your better understanding.

PRINCIPLE OF OPERATION OF “ON-LINE” CLEANING SYSTEM

The dust-laden gas enters through the hopper/casing by suction or positive pressure. The heavier dust particles fall immediately into the hopper, while the lighter dust gets deposited on the outside of the filter bags. This dust is removed in a predetermined cycle by a pulse of high-pressure compressed air. This dislodges the dust cake from the bag.

8The dust falls into the hopper. Bags are cleaned either by time mode or differential pressure mode. Cleaning of bags is essential to reduce operating cost and improve the performance of the bag filter. Moreover, high efficiency venture inserts mounted on the bag opening increase the cleaning effectiveness.

Bags are suspended from a tube sheet at the top of the collector and are internally supported by cylindrical wire cages to prevent them from collapsing.

In an On-line bag filter, bags are cleaned row-by-row, even when the dust-laden gas is filtered. The sequence of cleaning is controlled automatically by a sequence controller. This operates the assembly of solenoid and pulse valves which direct the compressed air flow into the manifolds for effecting “PULSING”

9PRINCIPLE OF OPERATION OF “OFF-LINE” CLEANING SYSTEM

This version incorporates the advantages of pulsejet bag filter as well as that of reverse air bag house. Each compartment is similar to an online pulse jet bag filter. The cleaning process consists of sequentially isolating each compartment and cleaning the same with compressed air. All compartments are then cleaned automatically. Off-line cleaning is suitable for light and fine dust and for larger volumes where occurrence of fluidization is a distinct possibility.

STANDARD MODELS

Our standard models have a wide range of size and cloth areas in rectangular arrangements to suit particular requirement of client. SEIPL normally use 150mm/160mm dia bags with a venture-in-cage assembly.

TYPICAL APPLIACATIONS

Core sector: Steel, Cement, Aluminium, Refractory, Paper, Biomass / Husk, Fried Boiler, Wood, Power generation Unit etc.