Document 3J6pa0ed8g8VL57eeD2gyE4Zn

several stages thermal energy is re covered by means of waste-heat boilers, all of which feed into the 2?5- steam and electricity increased ac cordingly. The electric load exceeded the re One exhausts into the 65-psi header, and the other exhausts into the 30psi header. A pressure regulator [>>ie main steam system. However, most of the steam load is carried by liable capacity of the plant system. Part of the load was transferred station was installed between the 30psi header and the 20-psi header. lour gas-fired integral-furnace boilers to purchased power. Even with this The installation of the two units under automatic control. Steam for process is used at several relief, the plant system, was loaded to capacity. provided independent supply and control of the two process steam pressure levels. The gas reforming Lion's chemical plant engineers pressures, affording operating flexi < process uses steam at 65 psi and 20 showed that additional back-pressure bility and maintenance availability. psi, regeneration of purification solu turbine-generator capacity to pass The 30-psi unit was put in service tions at 30 psi, while feedwater heatins requires 20 psi. The users of intermediate and low- most of the process steam being sup plied by direct pressure reduction would add at least 2700 kw to the in DecemlxT, 1952. It has operated at nameplate rating and on test has demonstrated a capability beyond pressure steam w ere supplied by back plant generating system, and at the 2000 kw. The 65-psi unit went into pressure mechanical drive turbines same time serve to desuperheat the service the following month. It has and the original turbine-generators, process steam. operated at about three-fourths load. as well as by direct pressure reduction. A combination extraction and The El Dorado Chemical Plant's The original plant was self-suffi back-pressure unit was first con engineering staff of Lion Oil Com cient in electricity. The quantitv of sidered for supplying the various pany performed the load analysis, direct pressure-reduced steam for pressure-levels. Analysis of the steam designed footings, piping, and the process was relatively small. load at the various pressures indi electrical layout, erected the turbine- Revisions and additions to the cated that the energy recoverable generators, and installed all accesso ammonia plant increased the am from pressure reduction to 65 psi or ries pertaining thereto. monia production rate by 30 per to the lower pressure was nearly Since these turbine-generators op cent. Fertilizer solutions, pelleted equal. Two Elliott 1500-ktv back erate without increasing boiler load, ammonium nitrate, and ammonium pressure turbine-generators were in their energy cost is really low, below \ sulfate were added to the product stalled. Both turbines operate with the incremental cost on gas-engine list. The consumption of process 275-psi 540 F steam at the throttle. generators running on the system.