WSP10774 - Laserfiche WebLink

Home Browse Search

f.-... en only 15 percent processed in T~sco II retorts, the water ~anagement scheme is CT) similar to that for the Tosco II design2. This is ascribed to the fact that (Ji the~rocessed spent shale will contain about 9 percent rnois~ure by weigh~, requi:ing all of the process and cooling wastewaters for mois~urizi~g as well as additional makeup from the White River itself. In fact over 60 percent of the water required for moisturizing the sgent shale for disposal would be fresh water f~om the White River. The wastewaters that will be discussed include runoff, boiler feedwater makeup trea~T.ent blcwdown, cooling tower blowdown, retorting anc u~qrading wastewaters, and domestic wastes frcm the plant. ~e have assumed t~at the~e is no excess mine drainage water procuced during the surface ret:.or~ing process. If there is, t~e trea~~ent or ~andling of these excess g~oundwaters can be car~ied out in a manner described in Section 4.2. The wastewater ~u~'tities for t~e Tosco II process will be estirna~ed although ~e cos~s of was~ewa~er treatmene are considered to be zero since all of the wastewater is us~d fe: spent shale disposal~ The various treatment options have bee~ discussec ~n Section 2 and will no~ be repeated. The ~a~er guan~ities presented in this section will be based upon a 50,000 barrel/day plan~. There are, however, different interpretations c: ~he , meaning of ~~is size plant in te~s of the product output. In the ?araho desic~4 the ~ominal out?ut is expressed in terms of the crude shale oil prccuction, d . 2 , 10 h while the Tcscc es~g~ expresses the out?ut as t e sum of the uccrraded liquid fuels. !~ order ~o have a uniform basis :or comparing ci==srent retorting procedures and different grades of oil shale, a standard size oil shal~ cocplex will be one that is designed to praduce 50,000 bar~els/day of synthetic crude pl~s any byproducts not utilized as plant fuel. The total heating value of the basic product fuel is 2.9 x loll Btu/day4. The sized shale feed rate in the Paraho Direct and Indirect processes to produce 50,000 barrelS/day of synthetic crude is 87,350 and 100,000 tons/day of 30 gal/ton shale. respec~ively, while in the Tosco II process the sized shale feed rate is 73,350 tons/day of 35 gal/ton shale The water quanti-:.ies will be specified for both the "50,000 barrelS/day design" and a plant producing 50,000 bar~els/day of synthetic crude, ~here synthetic c~de for Paraho means pumpable crace shale oil and for Tasca II means partially ~pgraded shale oil. 60