Biomass gasification device

Abstract

The biomass gasification device described in this embodiment is equipped with temporary holding sections ( 10 )( 20 ) that temporarily hold and discharge heat carriers ( 30 ). The temporary holding section has a vessel ( 111 )( 121 ) and a discharge section ( 119 )( 129 ) for discharging the heat carriers. A baffle ( 115 )( 125 ) within the vessel ( 111 )( 121 ) is provided to form a gap between the main body of the baffle and the interior side wall of the vessel, for the heat carriers ( 30 ) to pass through. Alternatively, piping ( 131 )( 141 ) may be provided on the interior side walls of the vessel ( 111 )( 121 ) for passage of the heat carriers.

What is claimed is: 
     
         1 . A biomass gasifier comprising a temporary holding section for temporarily holding and discharging heat carriers,
 wherein the temporary holding section has a vessel and an outlet for discharging the heat carriers, the biomass gasifier is provided with a baffle within the vessel that forms a gap for the heat carriers to pass through the space between the main body of the baffle and the interior side walls of the vessel, or with a piping for the heat carriers to pass through on the interior side walls of the vessel.   
     
     
         2 . The biomass gasifier according to  claim 1 , wherein the temporary holding section is a preheater that preheats the heat carriers, and the discharge section is the preheater discharge section, the heat carriers that were discharged from the preheater bottom are fed to the pyrolyzer. 
     
     
         3 . The biomass gasifier according to  claim 1 , wherein the temporary holding section is a pyrolyzer that receives a supply of heat carriers preheated in a preheater, the pyrolyzer performs pyrolysis of the biomass using the heat coming from the heat carriers, and the discharge section is the pyrolyzer discharge section, and the heat carriers that were discharged from the pyrolyzer discharge section are fed to the preheater through the circulation section. 
     
     
         4 . The biomass gasifier according to  claim 1 , wherein the central region of the front face of the baffle is positioned higher than the peripheral region, and a sloping surface is provided between the central region and the peripheral region. 
     
     
         5 . The biomass gasifier according to  claim 1 , wherein the back surface of the baffle has a central region positioned lower than the peripheral region, and a sloping surface is provided between the central region and the peripheral region. 
     
     
         6 . The biomass gasifier according to  claim 1 , wherein a plurality of fixing members is provided between the main body of the baffle and the interior side walls of the vessel to secure the main body of the baffle to the vessel, and wherein the gap between the fixing members is a gap for the heat carriers to pass through. 
     
     
         7 . The biomass gasifier according to  claim 1 , wherein the main body of the baffle is disk-shaped, the main body of the baffle is attached to the vessel by a plurality of fixing members between the main body of the baffle and the interior side wall of the vessel, or by a plurality of fixing members on the back side of the main body. 
     
     
         8 . The biomass gasifier according to  claim 1 , wherein the vessel has an upper body and a lower body below the upper body, the cross-section of the lower end of the upper body is smaller than the cross-section of the upper end of the lower body, a baffle is provided below the lower end of the upper body, and a gap is formed between the baffle and the lower body.