Dosing in heating systems with heavy fuel oil boilers

In heating systems that are equipment with heavy fuel oil boilers, active environmental protection is pursued to reduce the emission values. Real-time emission readings determine the exact amount of additives that fed to each furnace, necessary to keep the emissions within the legal limits. Lutz-Jesco metering pumps are used for this purpose. They deliver controlled quantities of additives into the bunker tanks.

To ensure reliable operating conditions for the Lutz-Jesco magnetic diaphragm metering pumps which deliver to the boilers, a ring circuit is installed linking the bunker tanks. This is fed by upstream metering pumps, to ensure that the downstream MAGDOS pumps operate uniformly and reliably at all times. The additive metering quantity is regulated to correspond to the load on the burners; it is communicated to the metering pumps as a 4...20 mA steplessly variable analogue signal. Pulsation dampers fitted in the pipes as metering accessories ensure smooth and continuous metering, for a long working life of the complete system.