Technological conception of in-situ pulverized coal combustion and explosion power generation based on the deep fluidization mining
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摘要: 针对煤矿井下煤粉环境污染及传统煤炭燃烧能量利用效率低等问题,提出了流态化开采过程中煤粉爆轰发电的能量利用方式。在煤矿井下流态化开采的同时,以煤粉为燃料,掺混相应的助燃剂诱发煤粉爆轰,利用爆轰产生的能量驱动发电机发电,降低传统燃煤燃烧发电过程中化学能到蒸汽内能再到机械能的能量损耗;爆轰残留物经过除尘净化后回填采空区,避免采空区坍塌,促进废弃物的资源化利用;余热和余能经过高效回收用于供暖供热,促进能量的多级利用。流态化开采煤粉爆轰发电的技术构想将促进煤炭资源能量利用率的提高,推进煤炭资源朝着清洁、高效、安全、智能化的方向发展。Abstract: Aiming at solving the problems of underground coal dust pollution and low energy efficiency of traditional coal combustion, the energy utilization mode of pulverized coal explosion power generation in the process of fluidized mining was proposed.In fluidization mining in underground coal mines, pulverized coal is used simultaneously as fuel and mixed with corresponding combustion supporting agents to induce pulverized coal combustion and explosion.The energy generated by detonation is used to drive the generator to generate electricity, which will reduce the energy loss from transferring chemical energy to steam internal energy and then to mechanical energy in traditional coal-fired power generation.After dust removal and purification, the explosive residue is backfilled into the goaf to avoid the goaf collapse and promote the resource utilization of the waste.Waste heat and energy, through efficient recovery, can be used for heating to promote multi-level utilization of energy.The technical conception of fluidized mining coal combustion and explosion power generation will promote the improvement of the energy utilization rate of coal resources and push the development of the clean, efficient, safe, and intelligent use of coal resources.
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Key words:
- pulverized coal /
- combustion and explosion /
- power generation /
- energy utilization /
- key technology
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表 1 煤粉的挥发分与爆炸难易程度关系[12]
Table 1. Relationship between volatile matter and pulverized coal explosivity
挥发分Vdaf/ % 爆炸性 < 6.5 极难爆炸 >6.5~10 难爆炸 >10~25 中等爆炸 >25~35 易爆炸 >35 极易爆炸 -
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