Process for dry cooling of coke with carbon dioxide with subsequent use of the carbon monoxide produced

Abstract

A process for dry cooling of coke with carbon dioxide with subsequent use of the carbon monoxide produced, in which the coal is cyclically converted to coke and the coke, after the coking oven has been unloaded, is introduced into a cooling apparatus, and carbon dioxide is introduced in the cooling apparatus for dry cooling, such that a Boudouard reaction gives rise to carbon monoxide, and the carbon monoxide produced is used to heat the coking oven. The process allows utilization of the heat which arises in the course of coking for production of carbon monoxide, which in turn is used in the heating, such that a very balanced heat budget of the overall process can be achieved overall.

1 . A method for the dry quenching of coke in which
 coal is heated in a coke oven via heating by means of a high calorific gas and coke is obtained via cyclic coking, said coke being pushed out into a coke quenching car on completion of the coking, and   the incandescent coke is transported to a coke quenching device in a coke quenching car in which said incandescent coke is quenched to a temperature below the kindling temperature by means of a quenching gas, and   carbon dioxide (CO 2 ), which reacts at least partially with the incandescent coke to form carbon monoxide (CO) according to the Boudouard reaction, is used as the quenching gas,   wherein due to the dry quenching being carried out in a coke quenching device the carbon monoxide-containing quenching gas obtained is collected, and   the gas mixture obtained is at least partially returned to the coke oven in order to heat said oven with the carbon monoxide (CO).   
     
     
         2 . The method for the dry quenching of coke according to  claim 1 , wherein steam is added to the quenching gas. 
     
     
         3 . The method for the dry quenching of coke according to  claim 2 , wherein the steam is added to the coke quenching device above the coke cake and downstream in the direction of flow so that a reaction for converting surplus carbon dioxide into carbon monoxide can subsequently be carried out. 
     
     
         4 . The method for the dry quenching of coke according to  claim 1  wherein liquid water is sprayed into the quenching gas after it has passed through the coke cake so that a reaction for converting surplus carbon dioxide into carbon monoxide can subsequently be carried out. 
     
     
         5 . The method for the dry quenching of coke according to  claim 1 , wherein a hydrocarbonaceous fuel gas is mixed with the carbon monoxide used to heat the coke oven before said carbon monoxide is fed to the coke oven. 
     
     
         6 . The method for the dry quenching of coke according to  claim 5 , wherein the fuel gas is natural gas. 
     
     
         7 . The method for the dry quenching of coke according to  claim 5 , wherein the fuel gas is blast furnace gas from a blast furnace process. 
     
     
         8 . The method for the dry quenching of coke according to  claim 5 , wherein the fuel gas is coke oven gas. 
     
     
         9 . The method for the dry quenching of coke according to  claim 1 , wherein the carbon monoxide is subjected to a heat recovery process before being fed to the coke oven for heating. 
     
     
         10 . The method for the dry quenching of coke according to  claim 9 , wherein steam is generated during the heat recovery process. 
     
     
         11 . The method for the dry quenching of coke according to  claim 1 , wherein the carbon dioxide for quenching is split into at least two part streams, with one carbon dioxide part stream being fed into the coke quenching device from below and a further carbon dioxide part stream being fed in in a part of the coke quenching device in which the coke to be quenched has a temperature of 500 to 900° C. 
     
     
         12 . The method for the dry quenching of coke according to  claim 1 , wherein the coke oven battery from which the coke comes and which is heated by the carbon monoxide is a “heat-recovery”-type coke oven battery. 
     
     
         13 . The method for the dry quenching of coke according to  claim 1 , wherein the coke oven battery from which the coke comes and which is heated by the carbon monoxide is a “non-recovery”-type coke oven battery. 
     
     
         14 . The method for the dry quenching of coke according to  claim 1 , wherein the coke oven battery from which the coke comes and which is heated by the carbon monoxide is a coke oven battery in which the coking gas is collected and processed. 
     
     
         15 . The method for the dry quenching of coke according to  claim 1 , wherein the waste gas or coking gas from the coke oven is subjected to gas scrubbing in which the carbon dioxide is scrubbed from the waste gas and the carbon dioxide obtained is added to the carbon dioxide for quenching the coke. 
     
     
         16 . The method for the dry quenching of coke according to  claim 1 , wherein the coke quenching device is a coke quenching shaft. 
     
     
         17 . The method for the dry quenching of coke according to  claim 1 , wherein the coke quenching device is a coke quenching chamber. 
     
     
         18 . The method for the dry quenching of coke according to  claim 1 , wherein the coke quenching chamber is equipped with an antechamber.