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Gas-cleaning apparatus and method for high-pressure blast furnace

  • US 4,152,123 A
  • Filed: 02/28/1978
  • Issued: 05/01/1979
  • Est. Priority Date: 12/16/1977
  • Status: Expired due to Term
First Claim
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1. A gas-cleaning installation for a pressurized blast furnace comprising, in combination:

  • particle-separation means connected to a gas outlet of said pressurized blast furnace for removing particulates from a gas emerging therefrom;

    a wash tower connected to said particle-separation means, said tower being provided with spray nozzles for scrubbing gas from said particle-separation means with water, and a venturi scrubber downstream from said spray nozzles;

    a turbine unit receiving gas from said venturi scrubber, said turbine unit including an expansion turbine, a gas bypass bridged across said turbine, and means for selectively cutting off said turbine and rendering said turbine effective; and

    wash-water preparation means for receiving water from said wash tower and recycling water to said nozzles, said wash-water preparation means including;

    settling means for settling solids from wash water derived from said wash tower,a collecting reservoir for receiving water from said settling means,cooling means connectable with said reservoir for subjecting wash water to be recycled to cooling,a water bypass connected to said reservoir and across said cooling means for delivering uncooled water to said tower, andcontrol means for rendering said water bypass effective when said turbine is operative to deliver relatively warm water to said wash tower and for cutting off said water bypass and rendering said cooling means effective when said turbine is inoperative.

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