深圳大学学报理工版

孙猛,姜官军,冯继哲,等.竖井乏风废热提取用于井口防冻的现场实测[J].深圳大学学报理工版,2022,39(6):637-641.[doi:10.3724/SP.J.1249.2022.06637]
SUN Meng,JIANG Guanjun,FENG Jizhe,et al.The field measurement of wellhead anti-freezing technology using exhaust wind waste heat[J].Journal of Shenzhen University Science and Engineering,2022,39(6):637-641.[doi:10.3724/SP.J.1249.2022.06637]

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竖井乏风废热提取用于井口防冻的现场实测

孙猛^1,2，姜官军³，冯继哲²，马天泽²，周琳²

1.中国矿业大学深部岩土力学与地下工程国家重点实验室，江苏徐州221116;2.中国矿业大学力学与土木工程学院，江苏徐州221116;3.山东美天能源科技股份有限公司，山东泰安271019

关键词：岩土工程;节能技术;乏风;废热;井口防冻;乏风-新风换热

The field measurement of wellhead anti-freezing technology using exhaust wind waste heat

SUN Meng^1,2，JIANG Guanjun³，FENG Jizhe²，MA Tianze²，and ZHOU Lin²

1.State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;2.School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;3.Shandong Meitian Energy Technology Co. Ltd. , Tai’an 271019, Shandong Province, P. R. China

Keywords：geotechnical engineering; energy-saving technology; exhaust wind; waste heat; wellhead anti-freezing;heat transfer between exhaust wind and fresh wind

DOI: 10.3724/SP.J.1249.2022.06637

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为解决夏热冬冷地区、寒冷地区和严寒地区冬季井口防冻和节能减排等问题，提出了新型的矿井乏风-新风间壁式直接换热技术，并在神华宁夏煤业集团有限公司付诸实施.对某煤矿进行现场实测发现：换热后的新风输送至井口，与部分室外新风混合后的温度不低于2℃，满足煤矿规范要求；通过滴状冷凝充分吸收乏风中的潜热，换热过程不需要额外能源，仅需为新风提供动力，供暖期性能系数（制热量与输入功率的比值）达到12.1；通过替代原有2×104kg燃煤锅炉，年减排二氧化碳1.881×107kg、氮氧化物4.8×104kg、二氧化硫4.8×104kg；矿井乏风直接排放至大气中的矿尘减少2.178×104kg/a．该系统单个供暖季运行费用仅为225.85万元，比天然气锅炉系统节省426.65万元，比燃煤锅炉系统节省799.81万元．间壁式乏风-新风直接换热技术不仅运行费用低，而且运行过程无废水、废气及废渣等污染，是一项绿色环保、高效节能的新技术，为建设现代化新型绿色矿山提供一条新途径．

A new type of directly heat transfer technology between exhaust wind and fresh air was proposed and put into practice in Shenhua Ningxia Coal Industry Group Co. Ltd. so as to solve the problems of wellhead anti-freezing, energy saving and emission reduction in hot-summer-cold-winter region, cold region and severe cold region in winter. The field measurement results show that after heated and transported to the wellhead, the fresh air is mixed with some outdoor fresh air, and its temperature is not less than 2 ℃, which meets the requirements of coal mine specifications; the latent heat in the exhaust wind is fully absorbed through droplet condensation, and the heat transfer process does not need additional energy, but only the fresh air needs power. The average coefficient of performance (ratio of heating capacity to input power) in a heating period reaches 12. 1, by replacing the original 2. 0×104 kg of coal-fired boilers with new technology, the emissions of 1. 881×107 kg carbon dioxide, 4. 8×104 kg nitrogen oxides, 4. 8×104 kg of sulfur dioxide, and 2. 178×104 kg of dust directly, which used to be discharged into the atmosphere by mine exhaust wind, will be reduced annually. The operating cost of the system is only 2. 258 5 million Yuan per heating season, saving 4. 266 5 million Yuan compared with the natural gas boiler system and 7. 998 1 million Yuan compared with the coal-fired boiler system. The use of wall type exhaust wind and fresh air direct heat transfer technology has low operation cost, and it has no pollution of waste water, waste gas and waste residue in the operation process. It is a green environmental protection, high efficiency and energy saving technology, and can provide technical support for the construction of new modern and green mine.

引言
1 工程概况
2 技术原理
3 现场实测效果
4 经济和社会效益分析
结语

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