Document rDg3pMv4K2XaGe1Jbv8Vo7RV

VWis.inlo K. E._ Bouche r r W. _C __ttrn ai_rlch Plant April 29, 1975 DISPOSITION or AROCLOR RTLATED CUOJ ECT?IN HONOCHLOROBIPHENYL SCOPE____________ B. c. Bosse w. c. F. ngtnan J. R. Savage - B2SL A . E . Le i sy C . L. Johnson The Monochlorobip heny1 scope includes about $130,000 capital for projects that would assist In the Manu facture of Aroclors. They are: 1. Relocation of eating facilities to the current foreman's office- 2. Installation of a cooler on the catalyst mix tank to keep the Biphenyl some 30*F below Its flash point. 3. Modification of the continuous chlorlnstor blow tank, to remove dissolved HC1. Modifications Included a vacuum pump and associated piping and Instrumentation. Neutralization of dissolved HC1 can lead to corrosion of the steal Intermediate storage tanks. 4. Correction of some chlorine vaporizer Instrumentation including a chlorine line routed Into the Aroclor control room for pressure Indication. 5. Replacement of #2 Intermediate storage tank. The plant now plans to replace 12 Intermediate storage tank. Maintenance will submit this project. Recommendations: 1. Include relocation of eating facilities now In the Aroclor control room In the 1976 M.L.P. 2, Make necessary design changes to control the catalyst mix tank 30*F below the reported 234*F flash point. Recommend we first try to hold the Biphenyl in the transfer line from the East Diphenyl storage between 85 and 95*C. manually using in-line temperature indicator am! high/low temperature alarm. If this approach is not piactlcal, then re-conslder Installation of a cooler for the catalyst mix tank. HONS 021691 Messrs- LeleyJJohn son DISPOSITION OF AROCI.OR RELA1 D PROJECT IN MONOCHLOROB l PHENYL SCOfF. Page 2 4/29/75 WCK Recommendations (Cont'd) 3. Before Installing a vacuum pump Co degas Aroclor crude In che blow tank (1-422), other leas costly means should be explored* A new vacuum pump system would cost about $55,000 In new capital- Recommend we first determine If the vapor space In che Intermediate tank le above che estimated140*C dew point temperature. If maintained above 140*C, no further acceleration of corrosion of the intermediate storage tanks would be expected- On the other hand, if the temperature la near or below 140*C ,i f c e r proper Insulating job, we should consider adding lime direcclv to the Aroclor column still pot. This is now done at No. 3 still for Aroclor distillation without any serious corrosion problems. 4. A safety project should be Immediately Issued by TSD to correct the problem of having a chlorine line In che Aroclor control room- I hsvo noticed that our std. steam usage In the Aroclor department far exceeds expectations. Hourly usage Is in the 10,000 11,000 l/hr range. The vacuum jets are only a small part of this usage as shown below. Yearly steam cost la expected to be about $300,000 or above. Steam Usage 12 still Aroclor column 13 still 14 atill 231 526 256 256 #/hr I/hr I/hr I/hr Total 1269 I/hr Recommend the department atesm meter be repaired and used to find actual iteam usage. Also desirable would be a check on each steam trsp and determining of the stesm source for each / tm Kenneth E. Boucher Technical Services Depsrtment HONS 021692