Document e7aJ2bKaJv9zrD6L29aM6K3j9

TABLE 7 VI 7/1 il7Z Wl lb " EXPLANATION OF ACID/ALKAU SEWER-NUMBERS ' _. COLT.'r tC f^x f l^th Judic^r.1 ftcient Acid Distribution Ka vZ jt All numbers were token from records department and/or operating personnel. ST - .V U r' Acid sources (HCI plant productions) do not include inventory change . The orifice measuring Per/Tri reactor vent flows to the HCI absorber was not accurately accounting for all the weak acid produced in the absorber due to the erroneous assumption that the reactors were operating at a constant pressure. The vent flows have been corrected for varying reactor pressures by a factor of 0.803. This correction produced an HCI TPD that confirmed the total HCI TPD being measured fromthe bottom of the Per/Tri HCI absorber. The agreement of the two HCI measurements assures greater efficiency in accounting for weak acid produced and consumed. Miscellaneous acid sewers was an adjustment stream to balance the alkali presently being sewered, Alkali to Sewer v Silica Pigments' effluent to the sewer was calculated to have 13 TPD HCI equivalent of alkali. This was calculated using the alkali reported from the ^4 overflow and scaling up to the total sewer flowrate. This was checked using the material balance for the Pigments plant. >0 (2.5'gr/K*UH^(8.3452 Ib/gal) = 0.02085 Ib/gal (lit) (1000^'Wlit, Assume total plant sewer/^ 1500 gpmjs)) production rate of 100 TPD. (0.02085 fi/gol) (1500 gol/m}^) (1440 m/fi) (1 ton) = 22.5 TPD Na^O D 2000 Ikf. jt- *1022.5 TPD ^47 TPD HCIL/V mole/D Na,0) = jl'TPD HCI equivalent Z&'TT'lO `iS t a mole/ITRCT)^ (61.98 TPD NajO) Caustic for pH control was taken from the Records Department, as was tank 17 & 18 equivalent TPD. Alkali in the incinerator secondary scrubber effluent was based on a 14.5 gpm flowrate of cell liquor to the secondary scrubber. NaHC03 + HCI N&CI + H20 + C02 1350 Ib/hr NoHCO^ (36.47 Lb/hr HCI) = 586.06 IbAr = 7.03 TPD HCI (84.01 Ib/hr NaHCOg) -48- Sb X>44566 /J!* 018 Sewer NaOH - HC1 Balance Based on Conditions Acid Sources to 018 #1 WTU SS Effl. #2 WTU SS Effl. #1 Inc. Prim. Effl. 02 Inc. Prim. Effl. 03 Inc. Prim. Effl. 04 Inc. Prim. Effl. TOTAL 1 ue 5<lo^ --Ai~^ywgeM 9/ Flow (gpm) HCl (gpl) HCl (TPD) 4-0 0 -3. S' 4- ~)ob JX. *0 STO 6 * Is 2. or 0)Qud VI 1"0 O IO 0 2 "0 1gP2.00 0 D0 edI 2.&>S`9 TPDHCL Plant C - Clo + Caustic FLOW f2. g o eom. -Z.T ACID HEADER TOTAL 'LL, Yf TPD HC1 - ( | p. ~2. gpl NaOH = CAUSTIC HEADER TOTAL Silica @ /o $-Q Rpm + ~2 4" gpl Na20 = *2 J 7-P.^ iyr-j H, - TPP NaOH /7. / TPDJJCt c).07^' 34 TPP Xs HC In Acid H /C/ g ( ft O TPD Na^O VDCM Rx^Bottoms Total _gpm @ "2.0 , 4** TPD NaOH 018 Total HC1 Before COS J.ZJ TTOMC/ ?.o7 TPD HCl - (J2Xij=_TPD Na7o((^~^-i-y - ( 3.4 7. TPD NaOH*^,1N.1aQ2H hc: (Acid Hdr.) (Caustic Hdr.) ^77 *<,.1 ^ (VDCM) fjlliisde. t2.cj.hte Z&V L4J li/ &rvtt dit ^*7// I _ * .__ \-3Jr*r- tpd -3*079 SL 044567 A tQ fltfA ildW O Z )