Flue gas emissions continuous monitoring systems save time and money for marine and onshore monitoring applications. - Kim Hyo Young, Business Development Director, Analysis Instruments and Solutions, Asia Pacific Analytics, Emerson Process Management
The monitoring of fuel combustion efficiency and flue gas emissions is a common demand of many industries. The boilers and steam turbines in the power industry, process heaters and sulfur incinerators in the oil refining industry, industrial boilers, cement kilns and thermal power plants all require precise and compliant emissions. monitor.
Due to stricter regulatory requirements of the International Maritime Organization (IMO), emissions monitoring is also becoming a more critical testing requirement for marine applications.
The shipping company was hurt by the rising cost of energy and therefore needed to accurately measure the ship's fuel flow, including: FPSOs and other marine vessels. At the same time, due to operational requirements and extremely limited space, these ships also face some challenges when installing monitoring systems.
Similarly, onshore shipping devices also require intensive emission control to meet regulatory requirements in the region, but these devices are subject to environmental challenges, such as corrosion from sea salt environments, and therefore require changes in the configuration of the system.
Like installations in all industries in Asia, offshore installations of emissions monitoring systems have a high cost of trenching, which limits the potential expansion and change of emission monitoring systems. In response to these challenges, the applicable solution is a simple, cost-effective Continuous Emissions Monitoring System (CEMS). In some cases, an ideal continuous emission monitoring solution can use a wireless solution.
Operational Performance For Asian shipbuilding and marine engineering companies, CEMS equipment enables it to improve the operational performance of FPSOs, meet regulatory requirements, and perform real-time emission monitoring of gaseous emission compositions generated by engines on FPSO vessels.
The installation of the CEMS allows the operator to monitor the emissions of fumes from the combustion of the ship's fuel. This information helps to determine if the flue gas needs to be scrubbed to reduce CO2, NOx, and SO2 emissions because these parameters need to be met by international shipping. standard.
The CEMS system selected for the FPSO should be a customized system that analyzes the sampling gas from different flow paths. Since the sampling gas in these flow paths is full of moisture, proper removal must be considered to ensure that all sampling is performed. The components of the flow path are all gaseous.
Therefore, all sample flow paths require heat insulation from the sampling point to prevent unnecessary condensation, and AISI 904L sampling lines are used in the system. The purpose of the sampling process system is to properly process the sample gas and adapt the sample gas to the analysis of each individual gas component by different analyzers.
The sampling system is designed to ensure that the system responds quickly to sample changes at each sample point. Sampling systems and analyzers are usually placed in an IP65 weather protection CEMS. The guards are made of 316 stainless steel. A built-in programmable controller (PLC) in the system is used to perform specific functions of the sampling processing system.
The system requested the PLC to initiate a pneumatic backflush on demand, as the CEMS system is characterized by a high particulate content that may block the sampling filter at each sampling point. The backflush function is implemented in the design of the sampling processing system in order to clean the sampling filter at each sampling point. In addition, the electrical components of the entire system must meet the ATEX Zone1 and GasGroupIIA standards.
The compact layout of the FPSO has limited space and does not allow for the analysis of the cabin. It is therefore best to use an explosion-proof CEMS system because of its small footprint. In addition, the analyzers used in the CEMS system do not require air conditioning because Emerson Analytical Instruments can be designed for ambient temperatures up to 50oC.
Air conditioners take up space and generate heat, and meeting ATEX's certification requirements means using more expensive air conditioning systems. The self-contained CEMS system has good simplicity and reliability, making it an ideal choice for demanding marine applications where FPSO vessels are deployed.
The pollution receiving device land marine pollution receiving device is another application which is located in Southeast Asia. The key to hazardous waste collection and disposal is how to make CEMS meet the requirements of these challenging applications. Regulators require that incinerator emissions data be reported daily and therefore require continuous monitoring.
At the same time, the pollution receiving device needs a flexible system. If the device expansion needs to relocate the control room or other facilities in the future, the CEMS system can be easily moved. However, installing a wired CEMS system now, if the system is likely to relocate later, this will be an inefficient and wasteful budget. For this device, the wireless configuration solution is an innovative solution.
As for the carrier-based CEMS, the sampling probe of the CEMS system designed for this device draws gas from the flue, and then processes it with a sampling processing system. The CEMS system includes a process gas analyzer, an oxygen/flammable gas analyzer, and an opacity analyzer (dust meter) depending on the application. The wireless adapter connects to each analyzer and the system wirelessly transmits data to the control room. .
The system adopts the advantages of industrial wireless communication of IEC62591 (Wireless HART) international standard. In its self-organizing mesh network topology, each device in the network can transfer information to adjacent devices, so if two devices If communication interference occurs, the network will automatically provide an alternative path.
Therefore, changing the layout of the device no longer interferes with the data transmission path. Because of this high flexibility of the wireless system, the device can rearrange the location of the CEMS and expand and analyze the measurement parameters according to the requirements.
Maritime applications are a case of flexible, cost-effective CEMS work. Whether it is a wired solution or a wireless solution, CEMS is an ideal solution for meeting emission reporting requirements in specific countries throughout Asia. Continuous smoke emission monitoring system can not only save installation costs and operating costs, but also can greatly reduce the time cost of the project by adding wireless solutions.
