Laserfiche WebLink
<br />f-.. <br />0) <br />0) <br />v:) <br /> <br />losses for the paraho Cirect process are shown in Figure 3-4j approximately <br />740 gpm (= 1190 acre-ft/yr) will be consumed in the 50,000 barrels/day paraho <br />Direct design and 950 gpm (= 1370 acre-ft/yr) will be consumed in a plant <br />5 b f. . . .' 3,5 <br />producing 0,000 arrels/day 0 synthet~c crude. In t~e Wh~te R~ver oes>gn <br />which s~ould also be characteristic of the Paraho Direct retort process, the <br />water evaporated for cooling is 900 gpm (= 1450 acre-ft/yr) for 50,000 barrel/day <br />of shale oil or about 1030 gpm (= 1660 acre-ft/yr) for a plant producing <br />50,000 barrel/day of synthetic crude. The value of 1030 gpm for White River <br />is consistent wieh the value of 850 gpm shc~~ in Figure 3-4 for the paraho <br />Direct p~ocess because the White River design requires additional energy for <br />upgrading, whereas the ?araho Direct design does not. The value of 2320 ;pm <br />shown in Table 3-1 was calculated for a design that assumed that the retort <br />gas is compressed p=ior to gas purification as ccmpar2d to the design shown i~ <br />Figure 3-4 in which tr.e gas is compressed at t~e gas turbines and is ~ot <br />cooled. Thus, ~~e higher value snown in ~able 3-1 is due ~o the cooli~g of <br /> <br />'-- <br /> <br />t~e retort gas. <br /> <br />We ~ave taken a range of a factor of three for the ~ate~ <br /> <br />consumed ~~ cooling for che paraho Direct 9rocess. In both the Tasca ar.d <br />~hite River designs, t~e blowdown from the cooling tower eventually encs up ~n <br />~oisturizing tne spent shale. <br />In both ~'e proposed Tosca II and White ~iver desi~ns, as well as the <br />?a=aho Direct design shown in ~i9ure 3-4, approximately 3 to 5 clcles of <br />concent=acion was used in the cooling tower. !~ is not necessar/ to go to <br />higher cycles of concentration in these cases because the bla~down is to be <br />used for spent shale disposal. <br />The blowdown from the cooling towers :or the Tasca I! design is 7:0 gprn <br />(= 940 acre-ft!yr) or 770 gpm (= 1240 acre-ft/gpm) for a mine-plant ~~plex <br />producing 50,000 barrel/day of synthetic crude, while fcr t~e White ~ver <br />design the blowdown is 230 gpm (= 370 acre-ft/gpm) or 260 <;Fm (= 420 acre-ft/yr) <br />for a plant producing 50,000 barrels/day of synthetic crude. For the ?araho <br />design shown in Figure 3-4, the blowdown is 630 gpm (= 1010 acre-ft/yr) for a <br />plant prOducing 50,000 barrel/day of synthetic crude. The total dissolved <br />salt concentration would range from 2000 to 10,000 ppm, depending on the <br />cycles of concentration ~~d the TOS of the source water. <br /> <br />60 <br />