The conversion of low ratio fabric filter or the electrostatic precipitator on the pulse jet bag filter especially in the aspect of heavy metals removal

S. Szulc*, Bipromet SA, Poland

The Electrostatic Precipitators (ESP) may require major upgrade or replacement due to present and future emissions consideration such as the ESP is not meeting outlet emissions requirements due to chemical composition of dust and especially in relation to mercury emissions control by sorbent injection upstream of the ESP, addition of a semidry or dry FGD system, and compliance with upcoming fine particulate control regulations. A lower cost option to consider for compliance strategy is the conversion of the existing ESP to a pulse jet fabric filter. This lecture introduces idea of conversion of the ESP to pulse jet bag filter executed at ArcelorMittal plant in Galati in Romania. Also is discussed the criteria that makes the conversion possible. The conversion of an existing ESP to a pulse jet bag filter is a process that is becoming common as more plants seek an air pollution control to minimize the emission.
A key to succesfully appying this retrofit technology is using long filter bags and ability to clean effectively the full lenght of these long bags. First of all checking of :
• the casing condition depending of the ESP life and operation conditions.
• Static re-calculations due to a higher under-pressure. The advantages of converting an ESP to pulse jet filter was taken into account:
1. lower cost than replacing with a new bag filter
2. minimal works of ducts modification
3. reuse of existing dust hoppers and dust conveying system
4. shortage of project time schedule
5. reduction of dust emission
6. reduction of power consumption
7. ready for future emission standards.

The conversion of an existing ESP to a pulse jet bag filter is a process that is becoming common as more plants seek an air pollution control to minimize the emission . A key to succesfully appying this retrofit technology is using long filter bags and ability to clean effectively the full lenght of these long bags.

Session: G14 - Industrial Air and Gas Cleaning
Day: 15 March 2018
Time: 09:00 - 10:15 h

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