一起煤仓爆炸事故分析

煤仓在一定的条件下会聚积瓦斯 ,而瓦斯达到一定的浓度 ,且氧气含量足够时 ,遇明火则会发生爆炸。因此 ,在建煤仓时 ,应使其便于观察煤仓的储煤情况 ;用明火测煤仓储煤量是绝对应禁止的。     

《煤矿安全监察条例》与安全生产立法问题探讨

基于对国务院 2 96号令《煤矿安全监察条例》和我国现行的安全生产法律、行政法规的全面比较分析 ,从执法主体、执法内容、执法监督及行政强制措施、即时强制和法律责任等 5个方面 ,研究、总结了《煤矿安全监察条例》在立法上的 13个特点及其对新时期安全生产立法的指导意义     

安全流变理论及其在煤矿事故中的应用

提出了“安全流变理论”,分析了事物“安全流变”的基本特征和理论基础 ,描述了煤矿事故的安全流变特性 ,同时指出煤矿事故的发生和发展可以用“安全流变理论”进行解释 ,进而说明“安全流变理论”是符合事物发展变化规律的。     

粉煤灰的有效利用

介绍了我国粉煤灰利用状况及政策,结合实例分析了粉煤灰的有效利用和清洁生产对促进粉煤灰有效利用的作用。     

Safe storage of selected fuels with regard to their tendency to spontaneous combustion

European standard EN 15188 is dedicated to the assessment of the tendency of solid flammable substances to spontaneous combustion. Fossil fuels and biofuels that substitute them are a frequent reason of fires caused by spontaneous combustion. Even though having different properties, both types of fuels can be assessed according to this standard by the method of the determination of the dependency of self-ignition temperature against the ratio of volume to surface area of geometrically exactly defined solid body, or based on the theory of thermal explosion according to Frank-Kamenetskii. The comparison of calculated values confirmed the agreement of both methods results, and the tendency of fuels to spontaneous combustion can be assessed by them.     

草原区煤炭开发的生态问题及其税费改革对策

锡林郭勒盟是我国重要的煤炭能源基地,近年来,煤电一体化开发为地区带来经济效益的同时也给环境带来巨大压力,大面积的草原受到破坏和威胁,引发了一系列生态问题,需要在锡盟未来的地区经济发展中引起注意。应该借鉴国际上对煤炭业开征环境保护税的经验,进行我国草原区煤炭业环境保护税费改革的制度设计和政策落实。     

SH-A工艺处理煤焦油加工废水的研究

采用"SH-A节能型强化生物脱氮除碳工艺"进行煤焦油加工废水处理的研究,讨论了各个处理环节的运行情况和处理效果。经该工艺对煤焦油加工废水进行处理后,COD、NH-N和矿物油的去除率均可达到98%,色Cr 3度和酚的去除率均可达到99%,氰的去除率可达到95%,各项指标均可达到国家《污水综合排放标准》(GB8978-1996)一级。     

煤化工有机废水处理技术探讨—以煤制气项目为例

文章以煤制气项目为例,介绍了煤化工项目生产中有机废水的来源及特性,探讨了三种常用的煤化工废水处理方法。总结出多级生物处理法在煤制气有机废水处理的实用性,对今后煤制气有机废水处理的工作起到一定的指导意义。     

Elemental mercury (Hg0) removal from coal syngas using magnetic tea-biochar: Experimental and theoretical insights

Mercury is ranked 3^rd as a global pollutant because of its long persistence in the environment. Approximately 65% of its anthropogenic emission (Hg⁰) to the atmosphere is from coal-thermal power plants. Thus, the Hg⁰ emission control from coal-thermal power plants is inevitable. Therefore, multiple sorbent materials were synthesized using a one-step pyrolysis method to capture the Hg⁰ from simulated coal syngas. Results showed, the Hg⁰ removal performance of the sorbents increased by the citric acid/ultrasonic application. T5CUF_0.3 demonstrated the highest Hg⁰ capturing performance with an adsorption capacity of 106.81 µg/g within 60 min at 200 °C under complex simulated syngas mixture (20% CO, 20% H₂, 10 ppmV HCl, 6% H₂O, and 400 ppmV H₂S). The Hg⁰ removal mechanism was proposed, revealing that the chemisorption governs the Hg⁰ removal process. Besides, the active Hg⁰ removal performance is attributed to the high dispersion of valence Fe₃O₄ and lattice oxygen (α) contents over the T5CUF_0.3 surface. In addition, the temperature programmed desorption (TPD) and XPS analysis confirmed that H₂S/HCl gases generate active sites over the sorbent surface, facilitating high Hg⁰ adsorption from syngas. This work represented a facile and practical pathway for utilizing cheap and eco-friendly tea waste to control the Hg⁰ emission.     

Mercury release behaviors of Guizhou bituminous coal during co-pyrolysis: Influence of chlorella

Co-pyrolysis of coal and seaweed can not only effectively decrease the carbon footprint but also improve the quality and output of coal pyrolysis products, however, the influence of seaweed on thermal releasing behaviors of mercury during co-pyrolysis process are still unclear. In this work, the chlorella and Guizhou bituminous coal were mixed and used to reveal the mercury release behavior during co-pyrolysis by the temperature programmed pyrolysis experiments, thermogravimetric and differential thermogravimetric analysis (TG-DTG) and thermogravimetry-mass spectrometry (TG-MS) methods, offering a sufficient explanation on the control technology of mercury pollutants in co-pyrolysis. The results exhibited that a large amount of reducing gases such as CO, H₂ and H₂O were generated in chlorella at the temperature range of 100-500°C, which was favorable for the transformation from oxidized mercury to elemental mercury, thus remarkably increased the release of elemental mercury in the raw coal sample. The mixed chlorella also significantly lowered the decomposition temperature range (from 400-600 to 300-400°C) of pyrite-bound mercury and decreased the decomposition temperatures of the pyrite-bound mercury species. Additionally, in the co-pyrolysis about 91.82% of mercury was released into the gas phase below 400°C and was 13.77% higher than that of in individual pyrolysis of coal.