-
高硫煤用于煤气化之脱硫方法探讨
介绍了针对高硫煤气化采用的气化炉中脱硫和粗煤气脱硫2种净化方法;探讨了气化炉中加入钙基脱硫剂的脱硫反应机理、脱硫效率及其影响因素;总结了高硫煤制粗煤气采用低温甲醇洗涤法脱硫的技术优势和脱硫效果。...
2020-07-10 14:39:05浏览：39
查看 -
适用于整体煤气化联合循环发电的国产煤气化技术概述
指出对于中长期以燃煤发电为主要格局和可持续发展要求的中国而言，发展洁净煤发电具有十分重要的意义。论述了整体煤气化联合循环发电作为一种非常重要的洁净煤发电技术受到了各国的青睐，而煤气化技术作为煤炭转化的龙头技术是整体煤气化联合循环电站系统的重要组成部分。在吸收引进国外先进技术和经验的同时，国内开发了多种大型煤气化技术，详细介绍了这些新技术，并对它们的技术特点进行了综合分析与讨论。...
2020-07-10 14:39:05浏览：43
查看 -
非等温气化实验条件下温度对煤气化的影响
目前煤炭气化技术作为清洁、高效利用煤炭的先进技术之一是我国能源领域的重要发展对象，煤的气化是利用气化剂将煤及其干馏产物最大限度的转变为煤气的过程。本文是利用热重分析法对褐煤进行非等温气化，研究褐煤在 CO2气氛下的气化特性，并且进行了相应的分析。实验结果表明，在非等温条件下，通过 FT-IR 的分析得到不同热解温度的半焦物理化学结构的特点。...
2020-07-10 14:39:05浏览：41
查看 -
浅谈煤气化技术进展及选择
阐述了研究和开发煤气化技术的重要意义,详细介绍了目前国内外主流煤气化技术的进展及应用,比较了各种煤气化技术的优缺点,并对如何选择煤气化技术提出了自己的看法....
2020-07-10 14:39:05浏览：36
查看 -
淮南煤气化灰渣特性研究
以高灰熔融温度淮南煤(朱集西煤和谢桥煤)为研究对象,在弱还原性气氛下,分析两种煤在不同温度下制得渣样的表观形态、微观形貌和晶体矿物组成的变化.结果表明:淮南煤气化渣样在1 300℃、1 500℃下具有一定粘结性,渣样中有非晶态的共熔物生成,晶体矿物随着温度的升高逐渐转变为莫来石....
2020-07-10 14:39:05浏览：35
查看 -
聚乙二醇改性脱除煤沥青中3，4-苯并芘
以聚乙二醇为改性剂，研究在溶剂条件下降低煤沥青中3，4-苯并芘的工艺。研究表明，当混合溶剂V环己烷∶V甲苯＝2∶1为反应溶剂、硫酸用量为煤沥青质量的6．67％、聚乙二醇600用量为煤沥青质量的10％、反应温度为80℃、反应时间为5h时，3，4-苯并芘降低率为85．59％。...
2020-07-10 14:39:05浏览：56
查看 -
煤矿生活污水处理研究
通过对煤矿厂生活污水特点的分析,结合原有污水处理站工艺及多家同类污水站的实践经验,提出采用BAF工艺＋混凝沉淀工艺处理煤矿厂区生活污水。运行结果表明：出水CODcr、BOD5、SS、色度均满足《城镇污水处理厂污染物排放标准》（GB18918—2002）一级B标准,同时CODcr、BOD5、SS及色度的去除率分别达到92.5%、92.5%、90.9%、90%,采用该组合工艺处理煤矿厂生活污水,在技术和经济上稳定可行。...
2020-07-10 14:39:05浏览：32
查看 -
Study on numerical simulation to water lowering in an open coal mine digging
In view of the situation of excavation of open coal mine for the underground water disaster, we should carry out simulation studies for the numerical value of the water lowering project and improve the accuracy and the level of the water lowering project. On the basis of the hydrological geological conditions of certain open mine digging, a more reasonable seepage numerical model was built according to MODFLOW. It was simulated in advance that the process of the confined water level descending with the time, and combining with the actual observations to test the correctness of the model. The calculation showed that the results coincided well with the results of actual measurement. Based on this, different water lowering numerical simulations were built for the open coal mine digging. It could be simulated and forecast that the changes of the groundwater level in drainage process within and outside the mine pit, and it was quantitatively assessed that the possible water lowering result of the opencast water drainage process, which provide an important basis for the actual water lowering project and the possible project disposal....
2020-07-08 21:52:19浏览：38
查看 -
Characteristics of the main polluting trace elements in the water environment of mining subsidence p
Mining subsidence pools are water bodies formed by soil subsidence near mines. We studied the impact the surrounding coal production activities and power plants have on these waters by measuring the concentrations of harmful trace elements in these waters. The concentration of the four elements F, Hg, Se and As increased by 0.92%, 0.78%, 0.70% and 0.81%, respectively, in the Datong mining subsidence pool from November 2004 to November 2006. The four elements increased by 1.58%, 1.23%, 1.08% and 0.92%, respectively, in the Xie'er mining subsidence pool and 1.16%, 1.06%, 1.02% and 1.01%, respectively, in the Pansan mining subsidence pool over the same time period. The absolute levels of F, Hg, Se and As in the pool are related to the background levels of the elements. A close relationship between nearby coal mines and power plants and increasing levels of the measured elements is noted....
2020-07-08 21:52:19浏览：43
查看 -
Removal of heavy metals from mine water by cyanobacterial calcification
The influence of different illumination intensities on cyanobacterial calcification induced removal of heavy metals from contaminated mine water was studied. Cyanobacterial calcification experiments were performed using a growth medium intended to simulate contaminated mine water. The results indicate that calcification can promote the removal of heavy metal ions. As the illumination intensity became stronger calcification rates increased and the removal of Zn2+ and Cd2+ became more obvious. When the illumination intensity was 10000 lux the removal of Pb2+ was the largest observed: stronger or weaker illumination reduced the amount of lead removed. The removal of three different heavy metals complies with an index function. For identical illumination intensities different ions were removed to different degrees....
2020-07-08 08:49:41浏览：55
查看 -
Mining-induced variation in water levels in unconsolidated aquifers and mechanisms of water preserva
Phreatic water resources are widely found in thick unconsolidated surface layers in western China, where water levels respond sensitively and quickly to large-scale underground mining in conjunction with shallow coal seams. Longwall face #32201 of the Bulianta Coal Mine, in the Shendong coalfield was selected as an industrial trail base, where field observations on ground-water levels were conducted when the working face was below a water-rich area. The space-time variation in the behavior of un-consolidated water levels in response to underground mining and its relation with of advance were observed through the field trials. The basic conditions for water preservation in mines are presented and the mechanisms of water preservation in mining analyzed, given the geological condition of two key strata and a severely weathered layer buried in the overburden. The field trails show that water preservation in mining shallow coal seams can be successful under suitable conditions, providing new technology for envi-ronmental protection in the desert coalfields of northwestern China....
2020-07-08 08:49:41浏览：24
查看 -
A penetrative addictive for water infusion in coal seams
The manufacturing process, characteristics, and application results of a rod-like penetrative additive (the penetrative rod)were discussed. The components and functions of the penetrative rod were studied carefully. A large number of orthogonal combinedtests were carried out and over 100 sample molds were made. Ultimately the components were decided after careful selection amongthese molds, mainly including hygroscopic major components and auxiliary material. The results of on-site practical applicationshow that such an addictive can increase the water penetrative ability effectively and has a remarkable effect on preventing dust pro-duction during coal seam excavation. The penetrating radius, the infusing velocity and the dust-preventive effect were systematicallystudied....
2020-07-08 08:49:41浏览：64
查看 -
煤气化反应机理研究进展
论述了目前国内外煤气化反应机理的研究现状，对氧化－还原反应机理进行了阐述，分析了影响气化反应速率的因素。列举了通过实验方法对气化反应活性中间产物进行的研究，指出了碳氧络合物的可能存在形态。进而通过量子化学理论对气化反应机理研究做出了补充，阐述了气化反应进程。最后对煤气化反应机理的进一步研究方向进行了展望。...
2020-07-04 21:56:39浏览：1447
查看 -
-
GSP气化煤粉输送问题及优化措施
为了实现GSP干煤粉气化工业装置煤粉密相输送系统的稳定输送,对锁斗与发料罐容积、锁斗阀、搅拌器、煤粉管线、疏松元件等影响煤粉稳定输送的因素进行研究.结果表明,通过调整锁斗疏松气标准状态下体积流量为900～1 200 m3/h,在疏松气管线上设置旁路,下料阀中设置吹扫气,发科罐上安装连续料位计,以及对发料罐中的煤粉管线进行固定,输送元件的布气板厚度增加2～3 mm,控制金属丝网孔隙为260 μm,实现了煤粉密相输送系统质量流量波动幅度小于5％....
2020-07-04 21:56:39浏览：1397
查看
