AN APPLICATION OF A BAG-TYPE DUST REMOVING METHOD IN PROCESSING CRUDE SYNTHETIC GAS PRODUCED BY FLUIDIZED-BED EQUIPMENT OF COAL GASIFICATION AND BAG-TYPE DUST REMOVING EQUIPMENT THEREOF

摘要

A dust removal method using baghouse filter to process raw syngas from fluidized bed coal gasifier, wherein temperature in the baghouse (300) is maintained at 180°C~250°C, pressure difference between the gas inlet (130) of the baghouse (300) and the gas outlet (110) of the baghouse (300) is controlled at 1000-5000Pa, the raw syngas from the fluidized bed coal gasifier enters the gas inlet under the pressure of 0.2-3.0Mpa. The present method effectively solves the technical problems of condensation and baghouse block due to high steam and ash content in the raw syngas from the fluidized bed coal gasifier and the present method is also applicable to remove dusts from the raw syngas produced by the fluidized bed coal gasifier under the conditions of high water-gas ratio (the water-gas ratio is up to 37%), high dust content (15-100g/Nm3 dusts) and 0.2-3.0Mpa pressure. The present invention also discloses a baghouse dust collector and a dense phase pneumatic conveying apparatus for the method.