生物质利用优化生产规模分析

Analysis of the optimum production scale for biomass utilization

为指导生物质资源利用，基于生物质资源岛式分布特点及生产力指数法，建立了生物质收集与加工利用过程的成本模型，提出了以单位原料的总成本最低为目标函数的生产规模优化方法。以气化技术为例，考察了秸秆类生物质在不同分布情况下的优化经济规模，并分析相关因素影响。结果表明：气化技术的优化经济规模为6～9万t／a；优化规模及总成本随固定投资增加而增加；运输费率增加导致优化规模下降，总成本上升。

A mathematical model was developed for biomass resource utilization to estimate the collection and production costs based on the biomass island distribution and productivity capacity index method. The production scale of a biomass utilization system can be optimizazed using the production cost as the objective function. Gasification technology was used as an example to determine the best plant sizes for various waste straw distributions. The factors affecting the optimum scale of operation and production cost were analyzed. The optimum gasification plant scale is 6× 10^4 -10 × 10^4 t/a. The optimum production scale and its cost increase with the capital cost. The production cost increases and the optimum scale decreases with increases in the transportation fees.