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Alternative TitleDeep Clean-up Process and Experimental Investigation on Coal Pyrolysis Gas
Thesis Advisor宋文立
Degree Grantor中国科学院研究生院
Degree Discipline化学工程
Keyword煤热解气   吸附   净化工艺   活性炭   分子筛
Abstract煤炭是我国最主要的能源资源,低阶煤的高效清洁转化利用,是我国能源领域的重大研究课题。煤热解分级混合发电技术正是在这种背景下应用而生的,和传统的燃煤发电相比,其发电效率提高了3~5个百分点,该技术的主要难题之一在于对进燃气轮机前的煤热解气进行净化处理以满足燃气轮机的进气要求。但目前,关于煤热解气用于燃气轮机发电的实例和净化工艺研究还尚未见报道。 焦炉煤气-燃气轮机发电已开始进入工业化尝试应用阶段,基于对我国现有焦炉煤气-燃气轮机发电深度净化工艺的研究,本文提出了煤热解气-燃气轮机发电的深度净化工艺,并对深度净化工艺中的脱BTX、脱多环芳烃、脱水和脱乙炔等关键工序进行研究。 本论文在实验室设计并搭建了一套固定床反应器装置,研究了低浓度模型化合物苯、萘在GH-8型活性炭上的吸附行为,水、乙炔在4A分子筛上的吸附行为。得到了如下结论: 1)在实验条件范围内,苯、萘在GH8上的吸附等温线可用Langmuir模型很好地描述;不同操作条件下低浓度萘的吸附穿透曲线,可用Yoon-Nelson模型进行描述。在此基础上,结合传质区模型计算了萘吸附传质区长度及其移动速度。 2)由实验知水-4A分子筛吸附等温线可用Langmuir模型描述,乙炔-4A分子筛吸附等温线可由Freundlich吸附等温式描述。并对不同操作条件下,乙炔在4A分子筛上的穿透曲线,采用Yoon-Nelson模型进行回归分析,得到了不同操作条件下的模型参数。结合传质区模型计算了乙炔吸附的吸附传质区长度及其移动速度。 3)结合50MW传统燃煤热电厂的设计改造工程,给出了煤热解气-燃气轮机发电的深度净化工艺。同时,给出了单环芳烃和多环芳烃共吸附反应器、乙炔吸附反应器和水吸附反应器的设计参数。
Other AbstractBased on current status of Chinese energy resource distribution, clean and efficient utilization of low rank coal is a major research issue for china. Hybrid Coal pyrolysis bridged hybrid power generation system emerged as the times require, when compared with traditional coal-fired power generation system, its power generation efficiency has a 3~5% increase. One of the technical problems is the coal pyrolysis gas clean-up, before feed into gas turbine for combustion. So far, there is no example of coal pyrolysis gas-gas turbine power generation and its clean-up process has not been reported. Coke oven gas-gas turbine power generation system has begun to come to industrial trial. Based on investigation of deep clean-up systems of coke-oven gas for gas turbine power generation in china, a new deep clean-up process for coal pyrolysis gas-gas turbine power generation systems has been proposed and experimental research on the removal of BTX, PAHs, water vapor and acetylene has been conducted. A fixed-bed reactor apparatus has been set up in lab to research the adsorption behavior of benzene and naphthalene on GH8 activated carbon at low concentrations. At the same time, the adsorption behavior of water and acetylene on 4A molecule sieve were also studied. Conclusions are as follows: 1)Langmuir isotherm can be used to describe the behaviors of benzene and naphthalene adsorption on GH8 activated carbon, and the breakthrough curves of low concentration were also measured at different experimental conditions, the breakthrough cueves of naphthalene can be described by Yoon-Nelson model. Calculation of the length and moving speed of mass transfer zone were obtained with mass transfer model. 2) The adsorption isotherm of water-4A molecule sieve can be described by Langmuir model and adsorption isotherm of acetylene-4A molecule sieve can be described by Freundlich isotherm. Yoon-Nelson model was used to fitted the datas of acetylene adsorption on 4A molecule sieve. Based on that, the length and moving speed of mass transfer zone with mass transfer model have been obtained. 3)For the design retrofit project of a 50MW traditional coal-fired thermal power plant, a deep clean-up process for coal pyrolysis gas has been proposed. At the same time, the design parameters of BTX and PAHs co-adsorption reactor, acetylene adsorption reactor and water vapor adsorption reactor have also been given.
Document Type学位论文
Recommended Citation
GB/T 7714
梅磊. 煤热解气深度净化工艺及其实验研究[D]. 中国科学院研究生院,2014.
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