TREATMENT OF WASTE LIQUOR FROM DESULFURIZATION AND DECYNIZATION OF COKE OVEN GAS

PURPOSE:To reduce the treatment cost for eliminating the toxic gas in cake oven gas by utilizing as heat source the sensible heat of the hot water generated from the dryer in a coal moisture conditioning equipment in a coke oven. CONSTITUTION:The waste liquor from desulfurization and decyanization p...

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Bibliographic Details
Main Authors OGAWA SHIGENORI, YASUNAGA SHUICHI, IWASAKI HIDEAKI, KANEDA JUICHI
Format Patent
LanguageEnglish
Published 05.04.1994
Edition5
Subjects
CHEMISTRY
FUELS
LUBRICANTS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE
TECHNICAL GASES CONTAINING CARBON MONOXIDE
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PURPOSE:To reduce the treatment cost for eliminating the toxic gas in cake oven gas by utilizing as heat source the sensible heat of the hot water generated from the dryer in a coal moisture conditioning equipment in a coke oven. CONSTITUTION:The waste liquor from desulfurization and decyanization processes where coke oven gas is brought into contact with an alkali absorption solution, is loaded into a concentration column, and the concentrated waste liquor from this column is combusted and cracked; the resulting cracked gas is immobilized and recovered. In this treatment process for such waste liquor, a steam reboiler and a heat exchanger are installed adjacently to each other as the heating source for the concentration column, and, as the heating source for the heat exchanger, the drain resulting from using hot water for drying feedstock coal for the coke oven is utilized; concurrently, fine regulation of the concentration degree in the concentration column with drain variation is controlled by the quantity of steam fed to the reboiler.
Bibliography:Application Number: JP19920265531