Filter system for purifying gas or air streams

US4263028A · kind A · utility

Assignee

• Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

• Manfred Ohlmeyer · Leopoldshafen, DE
• Jurgen Wilhelm · Gondelsheim, DE

Key dates

• Filing date: Jan 18, 1979
• Grant date: Apr 21, 1981
• Expiry date: Jan 18, 1999

Classification

• Technology area (CPC G): Physics
• CPC primary: G21F9/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter system is provided for purifying a gas stream by means of flowable or tricklable contact filter material, wherein the stream flows through the filter material and the filter material forms a movable bed. The system contains a filter chamber through which the filter material can flow and which is provided with an inlet opening and an outlet opening for the filter material between which the filter material is conveyed by gravity. The filter system includes deflection means for deflecting the stream, after a first passage of the stream through the filter bed to charge the filter bed for a first time, to a position above where the stream first passed through the filter bed and for conducting the stream at least once again transversely through the filter bed above the first charge so that the filter bed is charged a second time. The filter chamber contains a first opening where the stream enters the filter bed for the first time and is aligned with the deflection means, and a second opening aligned with the deflection means and above the first opening. The second opening is located where the stream leaves the filter bed for the second time, with a partial quantity of the gas st…