Fuel Oil Firing
Reliable fuel oil supplies need careful design to cope with high pour point stocks, dirty stocks, pressure control of liquid packed systems, and variable viscosities.
Firing oil through dual burners with a minimum flow of gas to the operating burners at all times is strongly recommended, regardless of whether oil or gas is the prime fuel. The flow of gas, in effect, acts as a safety pilot.
Individual plant considerations will significantly affect design details, but there are some concepts common to all fuel oil systems. See Figure 600-11 which shows a typical process control diagram for a fuel oil system.