Patent ID: 8597400
Filing Date: 2013-12-03
Classification: B01D,C21B,Y02P

Abstract:
1. A method for separating at least one gaseous component from a waste gas of an installation for producing liquid pig iron, liquid primary steel products or sponge iron, comprising: in a first step, passing a stream of the waste gas through at least one adsorption separator at a first pressure, whereby the gaseous component is largely separated from the waste gas and, in a second step, largely removing the gaseous component from the adsorption separator at a second pressure, which is lower than the first pressure, wherein the second pressure is generated by at least one jet pump, which is fed a stream of a propellant gas at a third pressure, which is higher than the second pressure, wherein either a top gas, an offgas, a surplus gas or a mixture of at least two of these gases is used as the propellant gas, wherein either a top gas, an offgas, a surplus gas or a mixture of at least two of these gases is used as the waste gas, and wherein the second pressure is detected by means of a measuring device and fed to a controller, with the aid of a set of rules, and with allowance for a setpoint value, the controller determines a manipulated variable and feeds it to a control element, wherein the stream of propellant gas to the jet pump is changed in such a way that the pressure corresponds as far as possible to the setpoint value.