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Sludge disposal process

  • US 5,490,918 A
  • Filed: 11/22/1994
  • Issued: 02/13/1996
  • Est. Priority Date: 01/25/1989
  • Status: Expired due to Term
First Claim
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1. A process for deodorizing, sterilizing and disposing of odor producing petroleum sludge or industrial waste and to produce a sanitized and deodorized petroleum coke, said process consisting essentially of disposing of and sanitizing and deodorizing said odor producing petroleum sludge or industrial waste by mixing said sludge or waste with steam and utilizing said mixture during a portion of a steam cooling step of a three stage cooling procedure of hot coke in a delayed petroleum coke process said three cooling stages comprising a) the sludge or waste and steam mixture cooling stage, b) an intermediate water to steam cooling stage, and c) a liquid water cooling stage wherein the hot coke is at a temperature above 725°

  • F.;

    wherein the mixture of steam and sludge or waste is injected during the said steam cooling step after coke drum vapors are diverted to a delayed coke blowdown/vapor recovery system thus exposing the mixture of steam and petroleum sludge or waste to steam distillation or "stripping" just prior to entering and while inside the coke drum and to thermal decomposition once deposited on the hot coke.

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