Patents by Inventor Norbert Ohlms

Norbert Ohlms has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process of purifying flue gases
    Patent number: 4842835
    Abstract: Flue gases or other contaminated humid exhaust gases which contain SO.sub.3 are cooled by an indirect heat exchange in a heat exchanger to a temperature below the dew point temperature of sulfuric acid and are cooled further to a predetermined temperature in an SO.sub.3 condenser by means of dilute sulfuric acid, which is sprayed to flow in a countercurrent to the gas, whereby dilute sulfuric acid having a predetermined concentration is condensed. The gas leaving the SO.sub.3 condenser is scrubbed and cooled to a temperature from 40.degree. to 55.degree. C. in a fine scrubber by a treatment with a sprayed aqueous liquor. The exit gas is reheated to a predetermined temperature in a reheater by a treatment with sprayed dilute sulfuric acid from the SO.sub.3 and after the condensation of SO.sub.3 is passed through a filter. Dilute sulfuric acid from the reheater is sprayed into the SO.sub.3 condenser.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: June 27, 1989
    Assignees: Metallgesellschaft Aktiengesellschaft, Stadtwerke Munster GmbH
    Inventors: Karl H. Dorr, Hugo Grimm, Heinz Neumann, Wolfgang Fennemann, Norbert Ohlms