Abstract: 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.

Abstract: An HRSG for fluidized bed gasification comprises a high temperature evaporator (200), a superheater (300), a low temperature evaporator (400), and an economizer (500) connected in series. The superheater (300), the low temperature evaporator (400) and the economizer (500) have a water-tube structure, and the high temperature evaporator (200) has a fire-tube structure. The HRSG of the present invention allows efficient heat recovery from the raw syngas of a fluidized bed coal gasifier, while avoids or reduces the corrosion of and damage to the components of the HRSG caused by high-speed ash particles in the syngas.

Abstract: A HRSG for fluidized bed gasification comprises a high temperature evaporator (200), a superheater (300), a low temperature evaporator (400), and an economizer (500) in series. The superheater (300), the low temperature evaporator (400) and the economizer (500) have water-tube structure, and the high temperature evaporator (200) has fire-tube structure.

Abstract: 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 1000-5000 Pa, the raw syngas from the fluidized bed coal gasifier enters the gas inlet under the pressure of 0.2-3.0 Mpa. 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 (15-100 g/Nm3 dusts) and 0.2-3.0 Mpa pressure. The present invention also discloses a baghouse dust collector and a dense phase pneumatic conveying apparatus for the method.