本文選題：煤炭地下氣化　切入點：煤氣泄漏　出處：《華北科技學(xué)院》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：煤炭地下氣化(Underground Coal Gasification,簡稱UCG)是世界煤炭開采的研究方向之一,是從根本上解決傳統(tǒng)開采方法存在的一系列技術(shù)和環(huán)境問題的重要途徑,是一項符合可持續(xù)發(fā)展需要的環(huán)境友好的綠色技術(shù),必將成為我國潔凈煤技術(shù)研究的重要領(lǐng)域。我國煤炭地下氣化項目仍處于工業(yè)試驗階段,在項目開展時會面臨諸多安全問題,其中煤氣泄漏引發(fā)的安全問題最為突出,因此對煤氣泄漏安全問題研究至關(guān)重要。本文以計算流體動力學(xué)軟件(CFD)為基礎(chǔ),模擬分析煤氣泄漏在巷道中擴散規(guī)律,在此基礎(chǔ)上提出安全應(yīng)急預(yù)防措施。本文首先對煤炭地下氣化系統(tǒng)的組成部分,工藝流程和氣化原理進(jìn)行分析,通過對煤氣組分進(jìn)行了物理、化學(xué)性質(zhì)歸納,重點分析了主要成份一氧化碳、氫氣、甲烷的毒害機理。其次對整個系統(tǒng)進(jìn)行危險性分析,確定煤氣泄漏問題是煤炭地下氣化應(yīng)更重視的安全問題,同時對產(chǎn)生煤氣的重點區(qū)域氣化區(qū)進(jìn)行易泄漏點的分析,為后續(xù)數(shù)值模擬提供數(shù)據(jù)參考;然后,分析歸納了計算流體動力學(xué)CFD的技術(shù)理論以及氣體擴散方程,建立了煤氣在巷道中的擴散方程。依據(jù)現(xiàn)場項目實際的氣化區(qū)平面圖和通風(fēng)圖,選取1#氣化爐附近的巷道進(jìn)行物理建模和模擬。數(shù)值模擬過程中,選取泄漏速度、通風(fēng)風(fēng)速等因素作為可變參數(shù),得到了煤氣的擴散的規(guī)律。最后依據(jù)模擬結(jié)果提出安全預(yù)防應(yīng)急措施,可為實際煤炭地下氣化項目的安全進(jìn)行提供理論指導(dǎo)。
[Abstract]:Underground coal gasification (Coal) is one of the research directions of coal mining in the world. It is an important way to solve a series of technical and environmental problems existing in traditional mining methods. It is an environmentally friendly green technology that meets the needs of sustainable development and will certainly become an important field in the research of clean coal technology in China. The underground coal gasification project in China is still in the industrial test stage. During the development of the project, many safety problems will be faced, among which the safety problems caused by gas leakage are the most prominent, so it is very important to study the safety problems of gas leakage. This paper is based on the computational fluid dynamics software (CFDs). On the basis of simulating and analyzing the diffusion law of gas leakage in roadway, the safety emergency prevention measures are put forward. Firstly, this paper analyzes the components, technological process and gasification principle of underground coal gasification system. By summarizing the physical and chemical properties of the gas components, the toxic mechanism of the main components carbon monoxide, hydrogen and methane is emphatically analyzed. Secondly, the hazard analysis of the whole system is carried out. The problem of gas leakage is a safety problem that should be paid more attention to in underground gasification of coal. At the same time, the leakage points of the gasification area in the key area where the gas is generated are analyzed to provide data reference for the subsequent numerical simulation. The technical theory of computational fluid dynamics (CFD) and the gas diffusion equation are analyzed and summarized, and the gas diffusion equation in the roadway is established. Selecting the roadway near the 1# gasifier for physical modeling and simulation. In the process of numerical simulation, factors such as leakage velocity, ventilation speed and other factors are selected as variable parameters. Finally, according to the simulation results, the safety prevention and emergency measures are put forward, which can provide theoretical guidance for the safety of actual underground coal gasification projects.
【學(xué)位授予單位】：華北科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD84

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃雪馳;馬貴陽;楊奇睿;王敏健;;天然氣管道非穩(wěn)態(tài)泄漏擴散的數(shù)值模擬[J];安全與環(huán)境學(xué)報;2017年01期

2 姚娜;張云鵬;劉王政;;風(fēng)速對煤氣泄露擴散影響的數(shù)值模擬[J];現(xiàn)代礦業(yè);2016年01期

3 鄧云峰;李群;蓋文妹;;有毒氣體泄漏場景模擬與區(qū)域疏散分析[J];中國安全生產(chǎn)科學(xué)技術(shù);2014年06期

4 朱銘;徐道一;孫文鵬;王作棠;韓孟;余學(xué)東;;國外煤炭地下氣化技術(shù)發(fā)展歷史與現(xiàn)狀[J];煤炭科學(xué)技術(shù);2013年05期

5 黃溫鋼;王作棠;辛林;;從低碳經(jīng)濟看我國煤炭地下氣化的前景[J];礦業(yè)研究與開發(fā);2012年02期

6 唐鳳金;李文軍;;淺述煤炭地下氣化面臨的問題及解決措施[J];化肥設(shè)計;2011年06期

7 郭湛;李力;商一帆;;煤炭地下氣化工藝危險有害因素的辨識與分析[J];安全與環(huán)境工程;2011年06期

8 閻超;于劍;徐晶磊;范晶晶;高瑞澤;姜振華;;CFD模擬方法的發(fā)展成就與展望[J];力學(xué)進(jìn)展;2011年05期

9 張明;王世鵬;;國內(nèi)外煤炭地下氣化技術(shù)現(xiàn)狀及新奧攻關(guān)進(jìn)展[J];探礦工程(巖土鉆掘工程);2010年10期

10 沈芳;梁新星;毛偉志;李玉蘭;李文軍;梁杰;;中國煤炭地下氣化的近期研究與發(fā)展[J];能源工程;2008年01期

，

本文編號：1618390