Korea Environment Corporation (KECO) displayed the latest air pollution monitoring systems at the 34th International Exhibition on Environmental Technology & Green Energy (ENVEX 2012). 

KECO was one of 230 Korean and 76 foreign exhibitors at ENVEX 2012, which took place at COEX in Seoul from June 11-14. 

Among the exhibits KECO showcased were CLeanSys, a remote monitoring system with various functions, which measures and transmits data from smokestacks to the control center via a telecommunication line. 

The logo of CLeanSys presents a clean environment and an advanced science system. “Clean” means a fresh and clean environment and “Sys” means an advanced science system building a continuous emission monitoring system (CEM), while the two circles of the logo symbolize the earth with advanced technology and a clean environment and the creation of a new paradigm mindful of the environment and people. 

KECO monitors facilities that annually release more than 10 tons of seven air pollutants °™ dust, CO2, NOx, So2, HCI, HF, and NH3 °™ and three measured items °™ temperature, flow, and oxygen. The pollutants and three measured items are measured automatically from a smokestack and then analog current signals are transmitted to the Data Logger in real time. 

CLeanSys is designed to build infrastructure, changing from the regulation-driven paradigm to a prevention-oriented system, to ensure the scientific utilization of statistical data about air pollution for making environmental policy decisions and to build a framework for emissions trading and the regulation of total emissions. 

CLeanSys boasts of the reliability of measured data since it is a test that checks and transmits data about the transmission system, Data Logger, front-end processor (FEP), and communication conditions from companies to a control center. This is to ensure compliance for the transmission system; to examine the location of the installed analyzer; the condition of the installation; its function and performance for system suitability; and to compare differences between measured date from the analyzer and data measured directly on the spot by the reference method for comparative accuracy.   

The transmitted analog signals from the analyzer are converted into digital values and are made into the average data for between five minutes and 30 minutes. 

Data transmitted to the control center through cable or wireless communication and a self-monitoring system is useful to improve emission and pollution prevention facilities. Data are transmitted by a modem through a leased line from the wireless controller, including a wireless modem, to the control center via a base station and by the internet using the Virtual Private Network (VPN).

The functions of the CleanSys control center are data collection and analysis; monitoring; forecasting and warning; and remote controlling. 

The transmitted data is validated and the emission charges are calculated. Both source facilities and local governments are notified by fax or phone at the same time when the transmitted data nears or exceeds the emission standard levels. If there are some missing data, ‘DUMP’  command orders the transmission of them, and Zero and Span gas are injected into the analyzer by ‘RCHK’ command and the analyzer is calibrated in real time. KECO can check the status of its proper functioning and have the reliability of the data.#