沼气工程产气量检测方法及装置  

Two Gas Measuring Methods and Their Devices for Anaerobic Plants

作　　者：冉毅[1,2] 席江[1,2] 丁自立[1,2] 贺莉[1,2] 蔡萍[1] 

机构地区：[1]农业部沼气科学研究所,成都610041 [2]农业部沼气产品及设备质量监督检验测试中心,成都610041

出　　处：《中国沼气》2017年第6期78-82,共5页China Biogas

基　　金：项目来源:中国农业科学院基本科研业务费(沼气工程关键检测技术研究);中国农业科学院科技创新工程(CAAS-ASTIP-2015-BIOMA)

摘　　要：基于气体流速与流量的关系和理想气体定律,文章提出了两种检测方法,设计了两套沼气工程产气量检测装置。方法 1是利用沼气输气管道已预留的采样口,采用管道风速传感器测量沼气流速V,再测管道截面积S,流量Q=VS,最后换算成标准状态下的流量;方法 2是利用精密流量计和软体袋组成检测装置连接到沼气工程发酵装置,精密流量计可测量气体流量、压力和温度,通过理想气体方程PV=nRT推导出产气量计算公式。两种方法无需沼气工程安装流量计,克服现有测量方法精确度不高、适用性不广和测量值不具备横向可比性等缺陷,在不同温度和大气压下对沼气工程产气量测量结果准确可靠,可实现第三方无损检测。Two sets of biogas measuring devices were designed based on the ideal gas law and relations of gas flow velocity with the amount of flow. One method is to measure gas velocity V with wind speed sensor,and then calculate the amount of flow in a standard state according to the pipeline cross-section area S,the amount of flow is: Q = VS. Another method is to use a precision flow meter and a gas bag,which measures the gas flow rate,pressure and temperature,and then calculate the amount of flow in a standard state based on the ideal gas equation: PV = nRT. These two methods could overcome defects such as low accuracy of existing measurement methods,inadequate applicability and low horizontal comparability for measured value. And the two methods could be used under different temperature and atmospheric pressure with accurate and reliable result.

关 键 词：沼气工程 产气量 检测 装置 方法 

分 类 号：S216.4[农业科学—农业机械化工程]