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Preparation and Application of Porous 316 Stainless Steel Filter Tube

Abstract: In the Shell Coal Gasification Process (SCGP), a porous stainless steel cone is used as a gas-distributor to make pulverized coal entering fluidization, ensuring the continuous transportation of coal powder and improving the combustion efficiency. In the service conditions, the porous cone must have high and uniform permeability and the proper strength. This study focuses on preparing porous stainless steel cones and tubes with high performance, permeability, strength, etc., for applications. The porous cone/tube with 32%-35% in porosity and 20 microns in maximum pore size was prepared by CIP. After welding

and sealing, the breaking pressures of cone/tube are more significant than 2.5 MPa, which meets the requirements for fluidization transportation of coal powder in SCGP.

Keywords: porous stainless steel; cone; shell coal gasification process; gas-distributor

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