流化床厌氧反应器工艺研究

论文编号:HG096  论文字数:13397,页数:35

摘  要：本文研究了流量对反应床层特性的影响，获得了流化床厌氧反应器生产负荷变化规律，流量对反应床层膨胀率、各组分产气量、产生气体中各组分含量、反应器内污泥颗粒大小的影响和气体产生对床层膨胀率的影响；并对中试规模的关键设备进行了选型及设计计算，同时规划了工艺流程。研究结果显示：床层实际初始流化流量vmf在3.73～4.16mL·min-1之间，与理论计算值3.864mL·min-1一致；在一定范围内，流量增大对反应量的提高是有利的，当流量为11.2mL·min-1时，单位时间内的反应量达到最大，反应负荷为4.66mg·L-1·min-1；适当提高流量有利于提高各组分的产气量，但流量对气体相对含量的影响不显著，甲烷含量约是二氧化碳含量的7倍；由于气体产生，热模时床层膨胀率明显高于冷模，在实验范围内，随流量的增大，膨胀率相差有越来越大的趋势；适当提高流量有助于污泥颗粒的成长。
关键词：污泥颗粒；流量；反应器；工艺设计

Study on the Fluidized Bed Anaerobic Reactor

Abstract：In this paper, the influence of flow on the bed characteristics is researched, variation of the production load of the fluidized bed anaerobic reactor, the influence of the flow on the bed expansion rate, gas production of each component, the relative content of the gas produced, the size of granular sludge and the influence of the gas produced on the bed expansion rate are obtained. The key pilot scale equipments are selected on the basis of calculation and the process flow is designed. Research shows that: actual minimum fluidization flow, 3.73～4.16mL·min-1, is in good consistency with minimum fluidization flow, 3.864mL·min-1, in theory. Within a certain range of the flow, large flow is help to production load. When the flow is 11.2mL·min-1, the maximum production load is 4.66mg·L-1·min-1. Improving the flow properly is help to gas production of each component, but influence of flow on the relative content of the gas produced is not significant, the content of CH4 is almost 7 times than CO2. The bed expansion rate in cold model test is obviously higher than it in hot model test due to the gas produced. Within a certain range of the experiments, the difference value of bed expansion rate in the tests becomes larger when improving the flow. Improving the flow properly is help to the growth of the granular sludge.
Keywords：Granular sludge; Flow; Reactor; Technology design

目  录

中文摘要 I
英文文摘 II
目  录 III
1  绪论 1
1.1  工艺设计概述 1
1.2  污泥颗粒概述 4
2  实验部分 8
2.1  实验试剂及仪器 8
2.2  测定项目及方法 9
2.3  实验流程 10
2.4  实验步骤 11
3  结果与讨论 13
3.1  蠕动泵标准曲线的测定 13
3.2  流量对反应床层膨胀率的影响研究 13
3.3  流化床厌氧反应器生产负荷变化规律研究 15
3.4  流量对各组分产气量的影响研究 18
3.5  流量对产生气体中各组分含量的影响研究 20
3.6  气体产生对床层膨胀率的影响研究 20
3.7  流量对反应器内污泥颗粒大小的影响研究 21
3.8  污泥性质与成分的测定 22
4  中试规模厌氧反应器处理猪粪废水工艺设计 24
4.1  工艺流程设计 24
4.2  主要设备选型 25
5  总结与展望 28
致  谢 29
参考文献 30