發(fā)布時(shí)間：2018-03-25 07:47

  本文選題：甲烷重整　切入點(diǎn)：強(qiáng)化重整　出處：《西南石油大學(xué)》2015年碩士論文

【摘要】：探索新型的能源轉(zhuǎn)化利用以及低能耗控制CO2氣體是21世紀(jì)上半葉能源科學(xué)領(lǐng)域研究的重要課題之一。本論文針對(duì)常規(guī)甲烷重整制氫過(guò)程所存在的能源利用不合理及CO2分離功耗過(guò)大等弊端在化學(xué)工程、環(huán)境工程及工程熱力學(xué)等學(xué)科的層面上進(jìn)行探討,提出了基于化學(xué)鏈燃燒熱耦合蒸汽強(qiáng)化重整氫電聯(lián)產(chǎn)系統(tǒng)并對(duì)其進(jìn)行研究。 基于總能系統(tǒng)物理能與化學(xué)能綜合梯級(jí)利用基本原理,分析了燃料直接燃燒過(guò)程炯損失較大的主要原因,即燃燒反應(yīng)的能量品位不匹配、不合理利用反應(yīng)特性、反應(yīng)中化學(xué)能損失的增大。依據(jù)燃料炯、化學(xué)反應(yīng)Gibbs自由能變化及熱量炯之間的相互關(guān)系,研究了燃料直接燃燒過(guò)程和化學(xué)鏈燃燒過(guò)程炯利用特性,從理論上分析了化學(xué)鏈燃燒系統(tǒng)燃料炯利用率提升機(jī)理。為證明化學(xué)鏈燃燒系統(tǒng)可增加系統(tǒng)有效輸出功,分析燃燒前分離、燃燒后分離、純氧燃燒及化學(xué)鏈燃燒等四種能源動(dòng)力系統(tǒng)。結(jié)果表明化學(xué)鏈燃燒中間換熱系統(tǒng)具有最高的炯效率(50.09%),較燃燒前分離(40.88%),燃燒后分離(44.59%)及純氧燃燒(42.51%)分別高出9.21、5.5、7.58個(gè)百分點(diǎn)�；瘜W(xué)鏈燃燒中間換熱系統(tǒng)燃料煳損僅為447.74MW。針對(duì)傳統(tǒng)制氫過(guò)程能耗較大的問(wèn)題,根據(jù)“降低CO2分離能耗、提高重整氣中H2純度”的系統(tǒng)集成原則,提出了基于化學(xué)鏈燃燒熱耦合蒸汽強(qiáng)化重整氫電聯(lián)產(chǎn)系統(tǒng)。通過(guò)與傳統(tǒng)蒸汽重整制氫系統(tǒng)比較,并且采用熱力學(xué)第二定律分析方法,探討聯(lián)產(chǎn)系統(tǒng)內(nèi)部能量轉(zhuǎn)化利用規(guī)律和制氫過(guò)程能耗降低的機(jī)理。結(jié)果表明新型聯(lián)產(chǎn)系統(tǒng)的最大炯效率為83.1%。聯(lián)產(chǎn)系統(tǒng)相對(duì)于常規(guī)甲烷蒸汽重整制氫系統(tǒng)節(jié)能14.4%。
[Abstract]:Exploring new energy conversion and controlling CO2 gas with low energy consumption is one of the most important topics in the field of energy science in the first half of the 21st century. And the disadvantages of CO2 separation such as excessive power consumption in chemical engineering, Based on the discussion of environmental engineering and engineering thermodynamics, the hydrogen electricity cogeneration system based on chemical chain combustion heat coupled steam enhanced reforming is proposed and studied. Based on the basic principle of comprehensive cascade utilization of physical and chemical energy of total energy system, the main reasons for the loss of fuel in direct combustion process are analyzed, that is, the energy grade of combustion reaction does not match and the characteristics of reaction are used unreasonably. According to the change of Gibbs free energy and the relationship between heat and energy, the characteristics of direct combustion of fuel and chemical chain combustion are studied. In order to prove that the chemical chain combustion system can increase the effective output work of the system, the separation before and after combustion is analyzed. Pure oxygen combustion and chemical chain combustion are four kinds of energy power systems. The results show that the chemical chain combustion intermediate heat transfer system has the highest efficiency of 50.09, which is higher than that of 40.88g before combustion and 44.59m after combustion) and 42.51% of pure oxygen combustion. The fuel loss of the chemical chain combustion intermediate heat transfer system is only 447.74 MW. In view of the problem of high energy consumption in the traditional hydrogen production process, According to the system integration principle of "reducing the energy consumption of CO2 separation and improving the purity of H _ 2 in reforming gas", a hydrogen-electricity cogeneration system based on chemical chain combustion heat coupled steam enhanced reforming is proposed. The system is compared with the traditional steam reforming system. And using the second law of thermodynamics analysis, The law of energy conversion and the mechanism of energy consumption reduction during hydrogen production in the cogeneration system are discussed. The results show that the maximum efficiency of the new system is 83.1 and the energy saving of the co-generation system is 14.4in comparison with the conventional methane steam reforming hydrogen production system.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ116.2

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本文編號(hào)：1662185