Alternative Waste Heat Recovery Systems

Figure 3300-4 shows several alternative waste heat recovery systems available to a Crude Unit.

Furnace with Steam Generation

Along with showing the process steam generated on E-68 and E-24, it highlights that:

1. The Crude Fired Heaters, (F10), instead of generating 40,500 pound/hour of 150 PSIG steam, could have:
a. Generated 23,900 pound/hour of 625 PSIG steam
b. Added an air preheater to save 73.5 MMBH
c. Combined with the exhaust from a gas turbine to make 13,000 kW of electric power and produce 53,000 pound/hour of 150 PSIG steam in the fired heaters economizer. (See Figure 3300-5.)

2. The Vacuum Fired Heaters F20, fired heaters, instead of generating 24,500 pound/hour of 625 PSIG steam, could have:
a. Generated 40,000 pound/hour of 150 PSIG steam
b. Added an air preheater to save 59.7 MMBH
c. Combined with the exhaust from a gas turbine to make 8,000 kW of electric power and produce 46,000 pound/hour of 150 PSIG steam in the fired heater economizer. (See Figure 3300-5.)

Figure 3300-5 depicts electric generators, and the turbines exhausting to the Crude-Unit fired heaters. It also details investments, annual savings, and before-tax payout.

F-10/F-20 Cogeneration Option

12. June 2018 by sam
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