發(fā)布時(shí)間：2018-05-23 11:59

  本文選題：井下降溫技術(shù) + 空壓機(jī)　； 參考：《江西理工大學(xué)》2015年碩士論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的不斷發(fā)展,礦產(chǎn)資源開(kāi)采量不斷增加,迫使大部分礦山轉(zhuǎn)入深部或地質(zhì)條件復(fù)雜的礦床開(kāi)采。伴隨著開(kāi)采深度的不斷增加,深井高溫?zé)岷?wèn)題已成為制約采礦業(yè)發(fā)展的重要因素之一。特別是近年來(lái)隨著科技的不斷發(fā)展,越來(lái)越多大型設(shè)備安裝在井下,井下機(jī)電設(shè)備硐室的高溫?zé)岷τ葹閲?yán)重。高溫工作環(huán)境不僅易造成設(shè)備故障,而且嚴(yán)重威脅著工人的身心健康,制約著礦山經(jīng)濟(jì)效益的提高。研究井下機(jī)電硐室熱質(zhì)交換機(jī)理,采取有效的降溫技術(shù)措施具有非常重要的現(xiàn)實(shí)意義。本文基于熱力學(xué)、流體力學(xué)和環(huán)境工程學(xué)等基礎(chǔ)學(xué)科,在分析空壓機(jī)硐室主要熱源及空壓機(jī)工作原理的基礎(chǔ)上,對(duì)空壓機(jī)硐室內(nèi)風(fēng)流熱質(zhì)交換過(guò)程進(jìn)行了理論分析,得到了傳熱微分方程及硐室內(nèi)風(fēng)流溫度預(yù)測(cè)方程,從理論上分析了空壓機(jī)硐室內(nèi)的對(duì)流換熱過(guò)程。同時(shí)本文以某鐵礦井下空壓機(jī)硐室為研究對(duì)象,從質(zhì)量守恒、動(dòng)量守恒和能量守恒等基本原理出發(fā),建立其數(shù)學(xué)模型,依據(jù)現(xiàn)場(chǎng)實(shí)際,建立其物理模型。應(yīng)用FLUENT軟件,對(duì)特定模型下的空壓機(jī)硐室內(nèi)對(duì)流換熱過(guò)程進(jìn)行了數(shù)值模擬,研究了不同入口風(fēng)速、入口溫度條件下空壓機(jī)硐室內(nèi)風(fēng)流流場(chǎng)、溫度場(chǎng)的基本變化規(guī)律。通過(guò)數(shù)值模擬與溫度、風(fēng)速的現(xiàn)場(chǎng)測(cè)試,提出了利用風(fēng)障調(diào)節(jié)硐室流場(chǎng)、安裝型號(hào)為K-4-.No12的風(fēng)機(jī)增加風(fēng)量及降低風(fēng)流入口溫度等綜合技術(shù)措施對(duì)某鐵礦井下空壓機(jī)硐室進(jìn)行了降溫。研究結(jié)果表明：溫度場(chǎng)受流場(chǎng)分布的影響,硐室形狀突變及風(fēng)流做繞流運(yùn)動(dòng)時(shí)易形成高溫渦流區(qū)；入口溫度在15～25℃時(shí),其入口風(fēng)速3-5 m/s為經(jīng)濟(jì)合理風(fēng)速；當(dāng)入口風(fēng)速超過(guò)5m/s時(shí),硐室溫度并無(wú)明顯下降趨勢(shì),而采用降低入口風(fēng)流溫度的方法效果明顯；經(jīng)實(shí)踐證明,在三臺(tái)功率為132KW的空壓機(jī)同開(kāi)的熱源條件下,當(dāng)入口溫度19.4℃,入口風(fēng)速3.2 m/s時(shí),空壓機(jī)硐室出口的溫度降低到30.1℃,一年多來(lái),硐室內(nèi)空壓機(jī)正常穩(wěn)定運(yùn)行。有效的保障了硐室內(nèi)機(jī)械設(shè)備的正常運(yùn)行,為礦井硐室降溫提供理論指導(dǎo)和技術(shù)支持,對(duì)保證礦山安全生產(chǎn)有重要的現(xiàn)實(shí)意義。
[Abstract]:With the development of the national economy, the exploitation of mineral resources is increasing, which forces most mines to be mined in deep or complicated geological conditions. With the increasing of mining depth, the problem of high temperature thermal damage in deep wells has become one of the important factors restricting the development of mining industry. Especially in recent years, with the development of science and technology, more and more large equipments are installed underground, especially the high temperature thermal damage of underground electromechanical equipment chamber. The high temperature working environment is not only easy to cause equipment malfunction, but also threatens workers' physical and mental health seriously, and restricts the improvement of mine economic benefit. It is of great practical significance to study the heat and mass exchange mechanism of underground electromechanical chamber and to take effective cooling technical measures. Based on the basic subjects of thermodynamics, hydrodynamics and environmental engineering, based on the analysis of the main heat sources in the air compressor chamber and the working principle of the air compressor, this paper makes a theoretical analysis of the air flow heat and mass exchange process in the air compressor chamber. The heat transfer differential equation and the air flow temperature prediction equation are obtained, and the convection heat transfer process in the air compressor chamber is analyzed theoretically. At the same time, based on the basic principles of mass conservation, momentum conservation and energy conservation, this paper takes the underground air compressor chamber of a certain iron mine as the research object, sets up its mathematical model and establishes its physical model according to the field practice. By using FLUENT software, the convection heat transfer process in the chamber of air compressor is simulated, and the basic variation law of air flow field and temperature field in the air compressor chamber under different inlet wind speed and inlet temperature is studied. Through numerical simulation and field test of temperature and wind speed, it is proposed that the chamber flow field be regulated by wind barrier. Comprehensive technical measures such as increasing air volume and lowering inlet temperature of air flow with K-4-.No12 installation model have cooled the underground air compressor chamber of a certain iron mine. The results show that the temperature field is affected by the distribution of the flow field, the high temperature eddy zone is easily formed when the chamber shape changes and the air flow moves around the flow, the inlet wind speed of 3-5 m / s is economical and reasonable when the inlet temperature is 15 ~ 25 鈩，

本文編號(hào)：1924634