|本期目录/Table of Contents|

[1]郭中山,张国民.微波透射式粉煤流量计在气化装置中的应用[J].工业仪表与自动化装置,2019,(01):64-67.[doi:1000-0682（2019）01-0000-00]
　GUO Zhongshan,ZHANG Guomin.Application of a microwave mass flow meter for pulverized coal in a coal gasification system[J].Industrial Instrumentation & Automation,2019,(01):64-67.[doi:1000-0682（2019）01-0000-00]
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微波透射式粉煤流量计在气化装置中的应用

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2019年01期
页码:
64-67
栏目:
出版日期:
2019-02-15

文章信息/Info

Title:
Application of a microwave mass flow meter for pulverized coal in a coal gasification system
作者:
郭中山;  张国民
神华宁夏煤业集团煤制油分公司，银川 750411
Author(s):
GUO Zhongshan; ZHANG Guomin
Coal to Oil Branch Company of Shenhua Ningxia Coal Industry Group,Yinchuan 750411,China
关键词:
洁净煤技术; 煤气化; 密相气力输送; 气固两相流; 微波透射式
Keywords:
clean coal;  coal gasification;  dense phase pneumatic conveying;  gas-solid two-phase flow;  microwave transmission
分类号:
TP212
DOI:
1000-0682（2019）01-0000-00
文献标志码:
A
摘要:
为解决煤气化过程中粉煤密相气力输送的流量在线测量问题，设计了一种基于微波透射法原理的气固两相流质量流量测量装置。该装置利用天线发射微波穿透粉煤流，并在粉煤流另一侧接收微波，将微波衰减程度作为粉煤浓度的衡量手段。与核放射式质量流量计在粉煤输送的工业现场中进行了对比实验。实验结果表明，两者在流量测量方面均具有良好的动态性能，能够跟踪粉煤流量的瞬态波动。但是，核放射式质量流量计测量得到的粉煤净浓度需要考虑背景载气密度、工作气压和温度的补偿，而且核放射源长期衰减会导致零点漂移，并具有核放射性污染的风险。与之相比，采用微波透射法的质量流量计结构简单，成本较低，安全可靠。
Abstract:
A gas-solid bi-phase mass flow rate measurement technology based on microwave transmission is presented to meet the demand of online flow measurement of pulverized coal in gasification plant. The microwave mass flow meter transmitted microwave through the pulverized coal flow and received on the opposite by antennas. The energy of microwave was absorbed by coal particles. The attenuation degree of the microwave indicated the concentration of the pulverized coal flow. Comparative experiment of microwave mass flow meter and radiometric mass flow meter was conducted in a full-scale gasification plant. Experimental results demonstrate both of them achieved reliable tracking both transient fluctuations of pulverized coal flow under real gasification plant conditions. However, the radiometric mass flow meter has more complicated structure due to compensation for carrier gas concentration, operation pressure and temperature, and suffers from zero-drift due to radioactive source decay and risk of radioactive pollution.

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备注/Memo

备注/Memo:
收稿日期：2018-11-05
基金项目：国家重点研发计划“先进煤间接液化及产品加工成套技术开发”(2017YFB0602500)
作者简介：郭中山(1966),男,高级工程师,从事煤化工自动化设计工作。
更新日期/Last Update: 2019-01-15