Device and method for using carbon dioxide originating from a combustion process

Abstract

A device for using carbon dioxide originating from the combustion of a byproduct has a preparing unit which is connected to a delivery station for fossil fuels, which has a burner for combusting a byproduct that is released when the fuel is delivered, and an exhaust gas line that is connected to the burner. A depositing device is fluidically connected to the preparing unit via the exhaust gas line, for carbon dioxide. The depositing device is fluidically connected to the delivery station to redeliver fuel via a supply line for carbon dioxide. Such a device allows the production and the subsequent controlled use of carbon dioxide from previously unused byproducts in the production of crude oil. A corresponding method by which carbon dioxide originating from the combustion of a byproduct is used in a controlled manner, in particular as part of a fossil fuel extraction process.

1 . A device for using carbon dioxide formed in the combustion of a gaseous by-product, comprising
 a treatment unit which is connectable to a recovery site for fossil fuel and having a burner for combustion of a by-product that is released in the fuel recovery and having an exhaust gas line that is connected to the burner, and   a carbon dioxide separation device that is flow-connected via the exhaust gas line to the treatment unit,   wherein the separation device is flow-connectable to the recovery site for renewed fuel recovery via a feed line for carbon dioxide.   
     
     
         2 . The device as claimed in  claim 1 , further comprising
 a fuel feed line for feeding the by-product which is connected to the burner of the treatment unit.   
     
     
         3 . The device as claimed in  claim 1 , further comprising
 an air feed line for supplying combustion air which is connected to the burner of the treatment unit.   
     
     
         4 . The device as claimed in  claim 1 ,
 wherein the separation device comprises an absorber for separating off the carbon dioxide from the exhaust gas by means of a scrubbing medium, and also a desorber that is flow-connected to the absorber for releasing the carbon dioxide from the scrubbing medium.   
     
     
         5 . The device as claimed in  claim 4 ,
 wherein the desorber of the separation device is flow-connected to the recovery site via the feed line for carbon dioxide.   
     
     
         6 . The device as claimed in  claim 1 ,
 wherein the exhaust gas line is heat-connected to a steam generator.   
     
     
         7 . The device as claimed in  claim 6 ,
 wherein the steam generator is flow-connected to a steam turbine.   
     
     
         8 . The device as claimed in  claim 7 , further comprising
 a generator which is connected to the steam turbine.   
     
     
         9 . The device as claimed in  claim 7 , further comprising
 a steam circuit of the steam turbine which is heat-connected to the separation device.   
     
     
         10 . The device as claimed in  claim 7 ,
 wherein the steam turbine is constructed as a counterpressure turbine.   
     
     
         11 . The device as claimed in  claim 4 ,
 wherein the exhaust gas line is flow-connected to a feed line of the absorber of the separation device via a withdrawal line.   
     
     
         12 . The device as claimed in  claim 1 ,
 wherein the exhaust gas line is flow-connected to the burner of the treatment unit via a return line.   
     
     
         13 . The device as claimed in  claim 3 , further comprising
 a heat exchanger for preheating the combustion air which is connected into the air feed line.   
     
     
         14 . The device as claimed in  claim 4 ,
 wherein the scrubbing medium used for separating off the carbon dioxide from the exhaust gas is an amino acid salt solution.   
     
     
         15 . A method for using carbon dioxide formed in the combustion of a gaseous by-product, the method comprising:
 wherein feeding a by-product released from a recovery site in a fuel recovery to a treatment unit,   burning the by-product with feed of air in the treatment unit,   feeding the carbon dioxide-containing exhaust gas formed in the combustion to a carbon dioxide separation device, and   feeding the carbon dioxide that is separated off from the exhaust gas in the separation device to the recovery site for renewed fuel recovery.   
     
     
         16 . The method as claimed in  claim 15 ,
 wherein the carbon dioxide present in the exhaust gas is separated off from the exhaust gas by means of a scrubbing medium in an absorber of the separation device, and wherein the carbon dioxide is released from the scrubbing medium in a desorber of the separation device that is flow-connected to the absorber.   
     
     
         17 . The method as claimed in  claim 15 ,
 wherein the carbon dioxide that is separated off from the exhaust gas in the separation device is fed to the recovery site proceeding from the desorber.   
     
     
         18 . The method as claimed in  claim 15 ,
 wherein the heat that is formed in the combustion is removed via a steam generator that is connected downstream of the combustion, and wherein steam is formed in the steam generator by the heat formed in the combustion.   
     
     
         19 . The method as claimed in  claim 18 ,
 wherein the steam formed in the steam generator is expanded in a steam turbine.   
     
     
         20 . The method as claimed in  claim 19 ,
 wherein a generator is operated by means of the steam turbine.   
     
     
         21 . The method as claimed in  claim 19 ,
 wherein the steam expanded in the steam turbine is used for separating off the carbon dioxide from the exhaust gas in the separation device.   
     
     
         22 . The method as claimed in  claim 19 ,
 wherein a counterpressure turbine is used as steam turbine.   
     
     
         23 . The method as claimed in  claim 16 ,
 wherein a first substream of the exhaust gas of the combustion is fed via a withdrawal line to the absorber of the separation device.   
     
     
         24 . The method as claimed in  claim 15 ,
 wherein a second substream of the exhaust gas of the combustion is fed via a return line to the combustion of the by-product.   
     
     
         25 . The method as claimed in  claim 23 ,
 wherein the first substream of the exhaust gas preheats the combustion air before entry into the absorber.   
     
     
         26 . The method as claimed in  claim 15 ,
 wherein the scrubbing medium used for separating off the carbon dioxide from the exhaust gas is an amino acid salt solution.