CORROSION INHIBITION OF COAL LIQUEFYING APPARATUS

摘要

PURPOSE:To effectively inhibit the corrosion of an apparatus, by a method wherein water is added to a mixture of a solvent and a liquefied product (obtd. by treating coal with the solvent in a hydrogen atmosphere at an elevated temperature under a high pressure), and said mixture is washed with water, whereby corrosive materials are removed from the mixture of the liquefied product and the solvent. CONSTITUTION:An emulsion breaker is added through a line 32 to a mixture of a solvent and a liquid coal-liquefied product passing, through a line 31. Then washing water is added through a line 33 to the mixture. The resulting mixture is thoroughly stirred in a stirring apparatus 12 for mixing. In a heat exchanger 13, the temperature of the mixture is adjusted to a temp. at which water, the solvent and the liquid liquefied product are not evaporated under pressure. Pref. the temp. is adjusted to 80 deg.C or higher. Then the mixture of the liquid liquefied product and the solvent is introduced into an oil-water separating tank 14 where oily component and water are separated from each other by the difference in specific gravity. The oily component, i.e. a mixture of the liquid liquefied product and the solvent is supplied through a line 34 to a next stage as the mixture of the liquid liquefied product and the solvent, from which corrosive materials being removed.