Patent ID: 8142730

Claim:
A two-stage granular moving-bed apparatus, comprising: a filtering part, comprising: a gas inlet part, having a plurality of first louver walls, for an exhaust gas flow to enter the filtering part; a gas outlet part, disposed at one side of the gas inlet part, and having a plurality of second louver walls corresponding to the plurality of first louver walls, for a clean gas to flow out; and a plurality of flow-corrective elements, disposed between the gas inlet part and the gas outlet part, and each corresponding to the first louver wall and the second louver wall, each flow-corrective element further having a first plate and a second plate, a first angle formed between the first plate and the vertical plane, a second angle formed between the second plate and the vertical plane respectively, and one end of the second plate connected to the body of the first plate; a filter media supplying part, disposed above the filtering part, and having a partition board therein so as to form two accommodation spaces within the filter media supplying part; a first granular material, accommodated within the first accommodation space, and flowing through a channel between the flow-corrective element and the first louver wall in a state of mass flow under the gravity, wherein the first angle formed between the first plate and the vertical plane is depending on flow properties of the first granular material; and a second granular material, accommodated within the second accommodation space, and flowing through a channel between the flow-corrective element and the second louver wall in a state of mass flow under the gravity, wherein the second angle formed between the second plate and the vertical plane is depending on flow properties of the second granular material; wherein the first granular material is a coarse filter media, the second granular material is a fine filter media, and the exhaust gas flows into the first granular material then into the second granular material to remove contaminants and to form the clean gas.