Patent ID: 9126133
Filing Date: 2015-09-08
Classification: B01D,C10L

Abstract:
1. A dust removal method using baghouse filter to process raw syngas from fluidized bed coal gasifier, wherein the raw syngas from the fluidized bed coal gasifier enters a baghouse from a gas inlet of a baghouse dust collector, flows through fibre spaces of the baghouse, and enters a clean gas pipe from a gas outlet of the baghouse dust collector; ashes are blocked and absorbed by outer surface of the baghouse and released fiom an ash outlet on the lower portion of the baghouse dust collector, wherein the baghouse dust collector comprises: a baghouse dust collector case body having an outer wall, wherein the baghouse in the case body, the gas outlet on the upper potion of the case body and in communication with the baghouse, and a gas outlet valve arranged on the gas outlet; the gas inlet on the lower potion of the case body and in communication with the case body and the outer surface of the baghouse, a gas inlet valve arranged on the gas inlet; a back flush inlet on the upper portion of the case body and in communication with the case body and the outer surface of the baghouse, a back flush gas source connected with the back flush inlet, a back flush valve arrmaged on the back flush inlet; wherein the ash outlet is at the bottom of the baghouse dust collector and in communication with the case body and the outer surface of the baghouse; and an ash hopper in communication with the ash outlet; wherein an insulating layer is arranged on the outer wall of the baghouse dust collector case body encompassing the baghouse to keep the temperature in the baghouse at 180° C.-250° C., and wherein the insulating layer is a steam-heated insulating layer comprising a steam tube wound around the outer wall of the case body and the steam tube is connected with a general steam valve.