Project: Sonic Horn for DE Nox System(SCR) of Goseong Hai Power Plant(1040MW x 2 Units)
Date: Unit #1 15th August 2018(36 Sets) / Unit #2 15th February 2019 (36 Sets)
Location: Goseong, Gyeongsangnam do
Product: Primasonics ® Acoustic Cleaning System
Principal (Provider): Artronix System Co., Ltd.(South Korea Distributor)
Problem: Ash accumulation on the top of the catalyst in SCR
In order to prevent ash from accumulating in the catalyst of the SCR De-Noxsystem during the new construction of the GoseongHai Thermal Power Plant, an efficient Acoustic Cleaner was selected rather than the Steam Soot Blower, which is difficult to operate and maintain. The installed quantity is Unit #1 –36 sets(6ea per Layer) / Unit #2 –36 sets(6ea per Layer), and the applied model is SAH-75C.
DHIC (Doosan Heavy Industries & Construction Co., Ltd), which installs the boiler, conducted a bid only for companies that passed the technical review through technical bid evaluation. Artronixconducted a technology evaluation and bid under the support of Primasonics, and received the order for this project.
Both Units #1 & 2 Boilers of GoseongHai Thermal Power Plant are operating, and they are operating stably without any problems due to the loading of ash in the SCR. Based on SCR application experience and Primasonics’ technical support, we were able to calculate and apply sounding sequence & time according to catalyst type and application conditions. Plate type catalyst is applied to the SCR of this power plant, but there are places where the honeycomb type is used in power plants with a small capacity or an old construction. In the case of SCR using honeycomb type, it operates repeatedly at a cycle of about 5 ~ 6 minutes per cycle, and in case of SCR using plate type, it operates at a cycle of
8 ~ 10 minutes. The Acoustic Cleaner is operated at the same cycle and is operated stably for 2-3 years, or as long as 4-5 years, without any maintenance.
In the case of SCR of Goseong Hai Thermal Power Plant, 2 horns operate at 10 sec each, and the next horn operates after 5 sec. (ON time 10 sec / OFF time 5 sec). The period of 1 cycle is set to 10 minutes.
