Process and apparatus for drying and preheating coking coal by means of flue gas

US4308102A · kind A · utility

Assignee

• Didier Engineering GmbH · DE

Inventors

• Dietrich Wagener · Essen, DE
• Claus Flockenhaus · Essen, DE
• Joachim F. Meckel · Heiligenhaus, DE

Key dates

• Filing date: Feb 21, 1980
• Grant date: Dec 29, 1981
• Expiry date: Feb 21, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10B57/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Flue gas discharged from a recuperator or regenerator of a coke oven battery has the steam thereof removed by means of a direct or indirect cooling and condensation operation. After the steam is removed from the flue gas it is then passed through a coke dry cooling plant in direct contact with hot coke therein to form dry cooled coke while simultaneously increasing the temperature of the flue gas. The flue gas is then passed through a coal preheating plant to directly contact and dry and preheat moist coking coal contained therein. The entire system is open, such that a given quantity of the flue gas passes only once through the system. When the temperature of the flue gas as received from a coke oven battery is extremely high, then the flue gas may be subjected to a partial cooling operation prior to the cooling and condensation operation. Further, a portion of the heat of the flue gas, after the discharge thereof from the coke dry cooling plant and prior to the introduction thereof into the coal preheating plant, may be used to generate steam and/or electricity.