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Waste water processing

  • US 3,966,633 A
  • Filed: 09/23/1974
  • Issued: 06/29/1976
  • Est. Priority Date: 09/23/1974
  • Status: Expired due to Term
First Claim
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1. In a system of synthesis gas manufacture including a gasifier wherein fluidized char is reacted with steam using a particulate heat exchange material to sustain the endothermic steam-carbon reaction to produce a synthesis gas stream which on cooling gives water contaminated with H2 S and NH3 and a carbonizer wherein fluidized coal is carbonized below about 700°

  • C to provide said char and vapors which on cooling give oil and water contaminated with H2 S and NH3 and organic materials, the improvement which comprises steam-stripping the contaminated waters to remove the H2 S but retaining sufficient ammonia to keep the pH between about 8.5 to 10.5 and introducing the resulting treated water into the gasifier to provide at least a portion of the steam requirement therefor while consuming the organic materials.

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