Patent ID: 9671067
Date: 2017-06-06
CPC Classifications: B03C,F17D,G01F,Y10T

Claim:
1. A method for determining injection rate of at least one Flue Gas Conditioning Agent (FGCA) from a FGCA discharge unit into a flue gas flowing from a boiler into an Electrostatic Precipitator (ESP), the method comprising: (a) obtaining a plurality of Optimal Charge Ratio Values (OCRVs) for the flue gas flowing from the boiler into the ESP via a plurality of primary modules, wherein each primary module of the plurality of primary modules is operable to measure and to calculate an Optimal Charge Ratio Value (OCRV) for the flue gas in a section of the ESP in which the primary module is arranged; (b) collecting the obtained plurality of OCRVs in at least one master module operative to electronically receive the plurality of OCRVs from the plurality of primary modules; (c) calculating in the at least one master module an average OCRV representing an average Back Corona Level (BCL) for the flue gas in the ESP; (d) comparing in the at least one master module the average OCRV to a predetermined OCRV to obtain a differential OCRV; (e) controlling the injection rate of the FGCA to adjust the differential OCRV via at least one secondary module operable to electronically receive the differential OCRV from the at least one master module and to control the injection rate of the FGCA from the FGCA discharge unit based on the electronically received differential OCRV; and (f) repeating (a) to (e) until the differential OCRV reaches substantially null.