30-01-2020 дата публикации
Номер: US20200032150A1
Принадлежит:
A continuous multi-stage vertically sequenced gasification process for conversion of solid carbonaceous fuel material into clean (low tar) syngas. The process involves forming a pyrolysis residue bed having a uniform depth and width to pass raw syngas there through for an endothermic reaction, while controlling the reduction zone pressure drop, resident time and syngas flow space velocity during the endothermic reaction to form substantially tar free syngas, to reduce carbon content in the pyrolysis residue, and to reduce the temperature of raw syngas as compared to the temperature of the partial oxidation zone. 2. The process of claim 1 , wherein the process is carried out under pressure claim 1 , preferably greater than full vacuum and less than 600 psig claim 1 , more preferably between atmospheric pressure and 100 psig.3. The process of claim 1 , wherein the syngas composition has a H2:CO ratio from about 0.5 to about 1.5 claim 1 , preferably about 0.8 to about 1.0.4. The process of claim 1 , wherein the carbonaceous fuel material comprises biomass fuel selected from wood chips claim 1 , railway tie chips claim 1 , waste wood claim 1 , forestry waste claim 1 , sewage sludge claim 1 , pet coke claim 1 , coal claim 1 , Municipal Solid Waste (MSW) claim 1 , Refuse-derived Fuel (RDF) claim 1 , or any combination.5. The process of claim 4 , wherein the biomass fuel is formed by a chipping claim 4 , shredding claim 4 , extrusion claim 4 , mechanical processing claim 4 , compacting claim 4 , pelletizing claim 4 , granulating claim 4 , or crushing process.6. The process of claim 4 , where the biofuel has been sprayed with claim 4 , coated with or impregnated with liquid or solid carbonaceous materials.7. The process of claim 1 , wherein the PDX stage temperature is greater than 1250° C. claim 1 , or greater than the ash fusion temperature to create liquid slag.8. The process of claim 1 , further comprising processing and cooling the tar free syngas to be used for ...
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