3 results about "Downdraft gasifier" patented technology

The utility model discloses a downdraft gasifier explosion-proof device which comprises an access hole, a mounting groove is vertically embedded in the inner wall of the access hole, a protective net is slidably inserted in the mounting groove, and the upper end of the mounting groove extends out of the side wall of the access hole and is provided with an insertion opening matched with the protective net; a reinforcing frame is arranged on the outer edge of the protective net, the reinforcing frame can be inserted into the mounting groove in a sliding mode through the insertion opening, and locking mechanisms are arranged in the side walls of the two sides of the reinforcing frame. The locking mechanism comprises a linkage rod rotationally installed in the side wall of the reinforcing frame, a locking block fixedly arranged on the linkage rod in a sleeving mode and a locking groove formed in the inner wall of the installation groove and corresponding to the locking block. The device is novel in design and simple in structure, can well avoid deflagration caused by fuel leakage when the gasification furnace sprays, is convenient to disassemble and assemble, does not affect gas inlet and maintenance of the gasification furnace, and ensures safe operation of the gasification furnace.

The invention discloses a biomass gasification system based on double-furnace linkage and intermediate product internal digestion, the biomass gasification system comprises a downdraft gasification furnace, a water gas gasification furnace and a heat insulation combustor, the downdraft gasification furnace can directionally gasify biomass, combustible gas and charcoal are generated, and advanced oxidation loss of a carbon source is avoided; the charcoal enters a water gas gasification furnace, combustible gas containing tar enters a heat insulation combustor and is mixed with oxygen-enriched air for combustion, and high-temperature flue gas and water vapor are generated; high-temperature flue gas and water vapor enter the water gas gasification furnace, the high-temperature flue gas can provide heat energy for water gas reaction in the water gas gasification furnace, the water vapor can serve as a gasifying agent to react with charcoal from the downdraft gasification furnace, and finally clean synthesis gas which does not contain tar and is rich in H2 and CO is generated by the water gas gasification furnace; the whole system does not need to additionally treat tar, the gasification efficiency and the target gas proportion are improved, the limitation of a traditional furnace type is broken through, and the requirement of high-value-added chemical synthesis for high-quality feed gas can be met.

The present application relates to biomass processing equipment technical field, specifically for a kind of biomass gas generation system, including downdraft gasifier and the sealing top cover being arranged at its top, further include: rotation is installed on the sealing top cover and extends into the guide material elbow pipe of downdraft gasifier inside;Rotation is installed on the bottom end of the guide material elbow pipe installation sleeve shell, the inside fixed mounting of the installation sleeve shell is equipped with a plurality of material dropping holes on the material dropping seat;The installation sleeve shell is provided with corresponding material dropping hole position on the material dropping seat top material mechanism and material dropping seat cover mechanism.The present application is driven installation sleeve shell by guide material elbow pipe in downdraft gasifier inside rotation and drives material dropping seat top material mechanism, and biomass fuel is extruded into group in material dropping hole, and biomass fuel is discharged in group, fundamentally eliminates the longitudinal stratification phenomenon of different fuel components due to the different natural falling speed of light and heavy, dry and wet, ensures that the material composition and density of entering gasification reaction layer are uniform.