论文中文题名: | 载铜吸附剂对采煤工作面上隅角CO消除性能研究及应用 |
姓名: | |
学号: | 16220214061 |
学生类型: | 工程硕士 |
学位年度: | 2019 |
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专业: | |
研究方向: | 矿井有害气体防治 |
第一导师姓名: | |
论文外文题名: | Study and Application of Elimination Performance of Copper-loaded Adsorbent for CO in Upper Corner of Coal Mining Face |
论文中文关键词: | |
论文外文关键词: | CO in Upper Corner ; CuCl ; Adsorbent ; Device development ; Elimination |
论文中文摘要: |
采煤工作面上隅角CO气体浓度超限问题始终困扰着矿井的正常生产活动,严重制约了开采进度,甚至对矿工的生命健康造成威胁,并且CO来源众多,治理困难。本文从消除的角度出发,结合工业CO吸附技术,制备吸附剂,研究CO消除性能最佳参数,提出适用于矿井采煤工作面的消除工艺方法,能够有效地降低采煤工作面上隅角CO浓度,对保障煤矿安全高效生产具有重要意义。
针对研究内容需要,设计研发了CO消除性能测试实验装置,主要包括:装置主体部分、配件气源部分、传感器、风速仪等,并对实验装置作用进行介绍,可以实现固体、液体吸附剂在不同影响因素下的实验研究。
理论分析选取了对CO选择吸附性大的氯化亚铜,浸渍法制备负载氯化亚铜的分子筛和活性炭吸附剂,高温焙烧使氯化亚铜以单层分散的形式负载到载体上;对负载氯化亚铜的分子筛、活性炭和未负载的分子筛、活性炭进行比表面积、孔结构测试,分析发现载体负载氯化亚铜后出现比表面积减小,孔容减小,平均孔径增大的趋势,并且分子筛的比表面积最大,孔容也最大,负载氯化亚铜效果最好;XRD测试结果显示氯化亚铜在载体上实现单层分散,但仍有部分氯化亚铜未负载到载体上,并且分子筛负载氯化亚铜的效果更好。
通过密闭空间静态消除实验,得到吸附剂消除CO变化规律为:第一次加入吸附剂后一氧化碳浓度急剧下降,10min后下降趋于平缓,15min时浓度基本不变;再次加入吸附剂后的一氧化碳浓度变化趋势跟第一次相同,但下降速率要小于第一次,并且第一次加入吸附剂后的消除量大于第二次,结果表明CO浓度对吸附剂消除效果影响明显,浓度越高,消除效果越好。测得消除量为:CuCl/NaY吸附剂> CuCl/AC吸附剂>NaY吸附剂>AC吸附剂,CuCl/NaY吸附剂消除效果最好,最高消除量达230ppm,消除率达61.17%。采用设计研发的CO消除性能测试实验装置对四种吸附剂进行动态消除性能测试实验,结果表明采用CuCl/NaY吸附剂,在风速为1.0m/s,吸附剂质量为600g,放置于管道中部时得到的消除性能最好,瞬时最大消除量为82ppm。采用正交试验设计测得吸附剂消除性能影响因素重要度为:吸附剂质量>吸附剂位置>风速。
最后采用固体消除工艺在某矿130205综采工作面进行现场试验,结果显示在综采面开采时上隅角CO浓度明显降低,说明固体消除工艺对降低工作面上隅角CO浓度有较好的效果。
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论文外文摘要: |
The problem of excessive CO gas concentration in the coal mining face has always plagued the normal production activities of the mine, seriously restricting the mining progress, and even threatening the life and health of the miners, in addition, the CO source is numerous and the treatment is difficult. In this paper, from the perspective of elimination, combined with industrial CO adsorption technology, adsorbent was prepared, the optimum parameters of CO elimination performance were studied, and the eliminating technology suitable for coal mining face was put forward. It can effectively reduce the CO in the upper corner of coal mining face, which is of great significance for ensuring the safe and efficient production of coal mine.
According to the research content, the CO elimination performance test experimental device was designed and developed, including: the main part of the device, the gas source, the sensor, the anemometer and so on, and introduced the function of the experimental device, which can realize the experimental study of solid and liquid adsorbents under different influencing factors.
Theoretical analysis selected CuCl with high selectivity to CO, and prepared with CuCl-loaded zeolite and active carbon adsorbent by impregnation method. The high-temperature calcination allowed the CuCl to be supported on the carrier in a single layer. The zeolite and active carbon adsorbents loaded with CuCl, and unsupported zeolite and active carbon are tested for specific surface area and pore structure. It is found that the specific surface area decreased, the pore volume decreased, and the average pore diameter increased after the carrier was loaded with CuCl. The specific surface area and pore volume of zeolite are the largest, and the effect of loading CuCl is the best. The XRD test results show that CuCl achieves a single layer dispersion on the support, but some of the CuCl was not loaded on the support, and the effect of CuCl loaded on zeolite is better.
Through the static elimination experiment in the closed space, the change rule of CO elimination by the adsorbent is obtained: the concentration of CO decreases sharply after the first addition of the adsorbent, and the decline tends to be gentle after 10 minutes, and remains unchanged at 15 minutes; the trend of CO concentration after adding adsorbent again is the same as that of the first time, but the decline rate is less than the first time, and the amount of elimination after the first addition of the adsorbent is greater than the second time. The results show that the CO concentration has a significant effect on the elimination effect of the adsorbent, and the higher the concentration, the better the elimination effect. The measured elimination amount is CuCl/NaY adsorbent > CuCl/AC adsorbent > NaY adsorbent > AC adsorbent, CuCl/NaY adsorbent has the best elimination effect, the highest elimination amount is 230ppm, and the elimination rate is 61.17%. Four kinds of adsorbents are tested for dynamic elimination performance by using the CO elimination performance test device. The results show that the CuCl/NaY adsorbent has the best elimination performance when it was placed in the middle of the pipeline at 1.0m/s wind speed and 600g adsorbent weight. The maximum elimination amount is 82ppm. The importance factors of the adsorbent elimination performance measured by orthogonal experimental design, the result is adsorbent weight> adsorbent position> wind speed.
Finally, the solid elimination process was used in the field of 130205 fully mechanized mining face. The results showed that the CO concentration in the upper corner was significantly reduced when the coal mining face was mined, indicating that the solid elimination process has a better effect on reducing the CO concentration in the working face.
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中图分类号: | TD711 |
开放日期: | 2019-06-20 |