Ricehull-fed pyrolyzer system for farm irrigation
2000
Pulmano, D.B. | Bisana, B.B. | Bondad, A.D.M. (Forest Products Research and Development Inst., College, Laguna (Philippines))
A study on the improvement of existing FPRDI [Forest Products Research and Development Inst.] pyrolyzer systems was conducted. Five prototypes of FPRDI-developed pyrolyzer were installed from 1994 to 1996: 2 in Dipolog City, Zamboanga del Norte [Philippines]; 1 in Samar; 1 in Sta. Lucia, Ilocos Sur; and 1 in Lubao, Pampanga. After several days of operation, the units in Dipolog City, Sta. Maria and Lubao ceased to function efficiently because of the rapid accumulation of tar and pyroligneous liquor in the cleaning tray. The engine was overhauled. The cleaning system was also improved to address the problem of tar deposits. Findings revealed that biomass pyrolysis is the thermal decomposition of cellulosic matter subjected below its stoichiometric air or oxygen requirement with resulting products of charcoal, tar, and combustible gas. The pyrolyzer system consisted of three main parts: the reactor, gas cleaning system and engine-pump set. In the reactor, combustible gas was produced 15 to 30 minutes from initial firing depending on the moisture content (MC) of the fuel. The engine initially powered by LPG, would suck the producer gas from the reactor. The gas passed through the cleaning system and air gas mixing box before finally replacing the LPG to run the engine coupled to a centrifugal pump with a rating of 500 gpm at 1800 rpm and 20 ft TDH. It used ricehull as alternative energy sources for fossil fuel in farm irrigation. It generated about 10 kw of thermal energy for shaft power applicable for water pumps for farm irrigation. It reduced cost of irrigation on a per hectare basis. It provided a more efficient and beneficial disposal system for ricehull. It encouraged the production of useful and marketable by-products of combustion, e.g. charcoal briquettes
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