Application method of hydrogen-rich gas produced after LNG process in coke oven heating

An application method of hydrogen-rich gas produced after an LNG process in coke oven heating comprises the following steps: 1) the hydrogen-rich gas is mixed into a main coal gas pipeline, which is heated, through a hydrogen-rich gas adding pipeline according to 3-5% of the total amount of coal gas in order to form a heated mixed gas; 2) the mixed gas is preheated, and air is preheated; 3) the preheated mixed gas and the preheated air enter an updraft combustion chamber and undergo mixed combustion; 4) residual hot waste gas enters a downdraft combustion chamber through a crossing hole; and (5) the hot waste gas in the downdraft combustion chamber enters a downdraft heat storage chamber from an inclined channel and is finally discharged into the atmosphere from a large chimney to form a closed-loop gas flow circulation process. The application method of the hydrogen-rich gas produced after LNG process in coke oven heating adopts the hydrogen-rich gas for coke oven heating, so the current situation of waste o