Emission Reduction with ESP Upgrade at Coal-fired Power Plant
(Room Garuda 12, 1st Floor)
19 Sep 18
11:30 AM
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1:00 PM
Tracks:
TRACK D - Power Plant Technologies
Apart from maximum power generation capabilities, emission is another major concern among all the power and utility plants due to the stringent emission regulations from government, as well as the public awareness for clean air. Therefore, electrostatic precipitator (ESP) has played a significant role to control dust particulate caused from boilers. Emission concern requires the plant not to only prepare for a good ESP maintenance practice, but also to have a plan for ESP performance enhancement due to ESP deterioration. In this paper, we will share a case study regarding ESP upgrade at the coal-fired boiler in one of the power plants in Indonesia. Its chimney emitted a lot of dust emission higher than government’s regulation at 80 mg/Nm3, which caused public pressure from the residents nearby the plant. The plant encountered with the problems of bent, cracked and detached mechanical parts inside ESP. Therefore, all these problems caused high spark and arc rate, which led performance of the ESP to be deficient when the controller tried to reach high kV and mA level and eventually resulted in high emission. Accordingly, ESP upgrade was recommended to be implemented, where the original saw band DE type was upgraded to rigid discharge electrode (RDE) to increase the corona discharge efficiency. Conventional T/R set was replaced by high frequency T/R set (HFTR) in order to get more power output (kW) with the same power input (kVA). Apart from that, the new CP design was replaced in order to reduce the quantity of CEs with the same collecting area. As a result, the ESP was able to perform better with the emission level below 50 mg/Nm3. The ESP upgrade not only can bring back ESP to its original operating condition, but also to enhance the performance and dust collecting efficiency of the ESP. KEYWORDS: ESP UPGRADE, EMISSION REDUCTION, RDE UPGRADE, HFTR UPGRADE