Patent ID: 9464248
Filing Date: 2016-10-11
CPC Classification: C10K

Claim Text:
1. A crude gas scrubbing system configured and operable for having a high separation level of dust in an entrained flow gasification unit for the reaction of ash-containing fuels with a gasifying agent containing free oxygen to give a crude gas having a high hydrogen content, comprising: a gasification reactor operable at temperatures of 1200 to 1900° C. and process pressures up to 10 MPa for processing the fuel through the reactor and for converting the fuel to crude gas and liquid slag, a quencher arranged beneath the gasification reactor, a gas and slag outlet from the reactor into the quencher for transferring the crude gas and liquid slag into the quencher, a central tube in the quencher and connected to the gas and slag outlet and the central tube also dips into a water bath at a lower end of the quencher, the central tube has an upper end and a water jet at the upper end is configured to introduce water into the stream of crude gas and slag; a lower end of the central tube is configured to separate the slag into the water bath while the crude gas rises upward within a bubble column outside the central tube, a crude gas outlet via which the crude gas leaves the quencher in an upper region of the quencher, at least one nozzle ring between a surface of the water bath and the crude gas outlet and the nozzle ring is configured to spray water into the crude gas, a guide tube concentrically surrounding the lower end of the central tube, wherein the central tube has a double-walled configuration to form an annular channel and cooling water is supplied to a top of the annular channel and leaves an annular gap in the water bath.