Patent ID: 7794514
Filing Date: 2010-09-14
Classification: C10J,C10K,Y02E,Y02P

Abstract:
1. A two-stage gasification apparatus coupled with heat recovery and washing, the apparatus comprising: a columnar shell; an entrained flow gasification chamber, a fixed bed gasification chamber, a waste heat boiler and a gas cooling-washing chamber set coaxially from top to bottom inside the columnar shell; process nozzle chambers are set at a sidewall and/or a top of the entrained flow gasification chamber, and process nozzles are set in the process nozzle chambers, the process nozzle chambers and the process nozzles are coaxial, and axes of the process nozzles are set at the top of the entrained flow gasification chamber parallel to or to coincide with axes of the entrained flow gasification chamber, and the process nozzles are set at the sidewall of the entrained flow gasification chambers are parallel to a horizontal plane or at an angle of 1 to 10 degrees; a feed-in lock hopper is set at a joint of the entrained flow gasification chamber and a fixed bed gasification chamber; a grate with non-symmetrical sides and a water-cooled jacket is set in the middle of a lower part of the fixed bed gasification chamber, and the grate is connected with an ash-pan, which is conjoined with a motor via transmission mechanism; on the ash-pan, there is an ash scrubber and slag outlet pores, and below the ash-pan, there is a slag channel at whose inlet an ash blower is set; an inverse cone is located in an upper part of a cooling-washing chamber, and a washing-cooling water distributor through which water enters the cone is seated at a top of the cone, and a gas duct is set below the cone and is located in the cooling-washing chamber, and bubble breaking plates are set between an inside of the washing-cooling chamber and an outside of a gas duct, wherein the bubble breaking plates are fixed at an inner side of the shell by brackets and have interspaces with an exterior of the gas duct; at the upper part of the cooling-washing chamber, there is a gas outlet, and at a lower part of the cooling-washing chamber a black water outlet is set and at a bottom of the washing-cooling chamber a slag water outlet is set.