The Green Instruments G5000 EGE Monitor is a cutting-edge system designed to monitor temperature and pressure in boilers, specifically exhaust gas economizers. With its advanced features and capabilities, it serves as a crucial tool for marine applications where boiler accidents, such as soot-fires caused by low-grade fuels and reduced engine speed, pose significant risks. By installing the G5000 EGEM, operators can access real-time data on pressure drop and temperature, allowing them to compare these readings with the current load. This data helps maintain economizer and boiler efficiency while preventing dangerous situations like over soot burning, high-temperature fires, and boiler meltdowns. The direct alarm for low water circulation ensures timely intervention and prevents potential damages.
The G5000 Boiler Protection Monitoring Family offers a range of systems tailored to different boiler types. In the case of exhaust gas fired boilers, such as exhaust gas economizers and exhaust gas boilers, the G5000 EGE Monitor is the ideal choice. It provides dynamic load-dependent monitoring and tracks parameters like water circulation flow, pressure drop, temperatures, temperature differences, and thermic stress. Some key features of the G5000 EGE Monitor include easy configuration of early warnings and alarms, adaptability to various boiler types, demand-responsive cleaning, prevention of steam blockage, automatic auxiliary pump start, and cost-effective protection against high damage risks. By utilizing this state-of-the-art monitoring system, marine operators can ensure the safety, efficiency, and reliability of their boiler systems, minimizing the potential for accidents and costly damages.
Sufficient water circulation is crucial for containing soot burning, which under any circumstances is likely to occur. Especially under manoeuvring, the high spark load from the engine will ignite soot. This is by itself not enough to cause a major EGE breakdown. Soot burning usually dies out due to the cooling effect of the boiler water. If however the water circulation is reduced (e.g. due to an increased surplus steam production, scale build-up, pump cavitation, or the like), the heat exchange is hampered leading to excessive steam build-up within the boiler tubes. This loss of heat exchange will let soot burning develop into high-temperature fires and boiler meltdown. Our experience has shown that insufficient water circulation is the single most important cause of exhaust gas boiler breakdown. The G5000 EGE Monitor controls the water circulation and will if necessary give an alarm and start the auxiliary circulation pumps.
With the G5000 EGE Monitor, you provide your crew with a decisive tool to keep your exhaust gas boiler clean. The G5000 EGE Monitor continuously measures inlet and outlet temperatures as well as pressure drop in relation to the engine load. This allows for dynamic monitoring of the boiler’s function and thus gives an accurate and current picture of the soot clogging level and the scale build-up.
Some exhaust gas economizers have static temperature and/or pressure sensors. However, these systems are designed to give an alarm in relation to the temperatures and pressure drops that occur under full load. The pressure drop and temperature at lower load levels are much lower. A static system cannot detect an unduly high-pressure drop. Especially under manoeuvring, some risk factors are combined. A higher spark load increases the risk of soot burning. Load shifts with feedbacks and interferences in the heating system increase the risk of pump cavitation. A simple absolute measurement of temperatures and pressure drop will not discover a spread in soot burning before it develops into a full-scale soot fire. Suddenly stopping the main engine to fight the fire is at this point an impossible task. The G5000 EGE Monitor will also under manoeuvring provide you with accurate early warnings and alarms. Finally, the temperature drop over the EGE will allow you to evaluate arising problems on the boiler’s water side.
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