共查询到18条相似文献,搜索用时 156 毫秒
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针对云煤能源公司下属焦化公司生产中因配煤水分高而造成的煤饼剥蚀量大、易坍塌、捣固成型困难等问题,进行了煤调湿工艺开发,以焦炉烟道气余热为热源或动力源,开发的"焦炉烟道废气-流化床"和"焦炉烟道废气-滚筒干燥机"煤调湿技术,可以控制配煤水分在10%左右,并且在节能、降耗、减排方面效益显著。 相似文献
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针对攀钢钒煤化工厂焦炉用煤特点和捣固配合煤水分要求,采用煤调湿工艺并安装微波在线测水和加水控制装置,保证捣固炼焦配合煤水分波动在1%以内,稳定装入煤水分,为生产顺行提供保障。 相似文献
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以处理量400t/h煤调湿为例,对比了蒸汽热源和焦炉煤气燃烧后废气热源2种煤调湿技术的技术可行性、出口废气露点、能源利用效率和操作安全性,结果表明,以焦炉煤气燃烧后废气或掺入一定比例甲醇驰放气的焦炉煤气燃烧后废气为热源的煤调湿技术是可行的。 相似文献
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焦炉装炉煤调湿及其效益 总被引:1,自引:1,他引:1
介绍装炉煤调湿技术的优点及近十年来日本普遍开展焦炉装炉煤调湿技术的试验和生产实践。利用荒煤气及烟道废气或干熄焦发电机背压蒸汽做热载体与湿煤进行热交换,使装炉煤达到预期的含水量。 相似文献
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煤调湿技术开发及在焦化厂的应用 总被引:1,自引:0,他引:1
中国是世界第一焦炭生产大国,但我国焦化厂炼焦用煤普遍存在含水量偏高(10%左右)的问题。采用煤调湿技术,将焦化厂入炉煤稳定在5%~6%,可降低炼焦耗热量,提高焦炉生产能力,改善焦炭质量,延长焦炉寿命。介绍了煤调湿技术进展及在日本和我国应用的情况,指出煤调湿是我国焦化工业今后重点开发和推广的技术之一。 相似文献
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S. K. Das A. S. Nandy A. Paul B. K. Sahoo B. Chakraborty A. Das 《Coke and Chemistry》2013,56(4):126-136
A by-product coke making plant is required to supply sufficient coke of good quality and adequate gas of high calorific value for the integrated steel plant to be a going concern. The one element that influences the handling of coal and impacts the operation and efficiency of the plant is moisture. Compared to other important properties of the coal blend, moisture can be easily manipulated. The coal moisture can be increased simply by adding water through hose pipes. Also, it can be reduced to 5–6 mass percent using Coal Moisture Control (CMC) and 2–4 mass percent using Dry-cleaned & Agglomerated Pre-compaction System (DAPS). Moisture content is one among the many variables affecting the bulk density of coal blend and those controlling the coke qualities and yield. Increase in moisture reduces coal grindability, coking pressure and internal gas pressure; helps in dust suppression during charging and hence reduces jamming of ascension pipes and hydraulic main. Batteries charging coals with high moisture content are not troubled with roof carbon deposits. It was observed that when moisture content in coal blend of SAIL-Bokaro Steel Plant increased to more than 8.50%, the calorific value of coke oven gas improved. In the working moisture range of 9–11%, the increase of the yield of coke oven gas per 1% of working moisture is 5.2 m3. Studies have shown, however, that the increase in moisture content of coal beyond 8% hampers strong coke formation. Pre-carbonization preheating process generally showed an increase in the proportion of 40–80 mm coke, compared with wet charges. For SAILBokaro coke ovens, driving out 1% moisture from coal blend requires 125 Mega-calories of heat/oven. With lesser moisture, the emission of NO x in atmosphere will also be low. On using dry to low moisture coal blend, the swelling of coke mass increases leading to difficulty in oven pushings. Hence, an optimum level of moisture content of charge coal needs to be maintained for improving coke oven productivity, coke quality and operational smoothness. The coke oven managers all around the globe maintain this optimum level according to their requirement, the operating conditions, the quality of product and by products, the oven health & age and the ease of handling. 相似文献
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初步分析了韶钢热电厂140t/h鼓泡流化床锅炉焦炉煤气床上整床点火失败的情况,详细介绍了木炭分床点火的成功方法。 相似文献