共查询到19条相似文献,搜索用时 238 毫秒
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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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介绍了太钢焦化厂固体废弃物、液态废水、工业废气的回收利用措施:将除尘灰、焦油渣、再生渣及含油废水按比例添加到装入煤中制半球状型煤,降低粉尘污染;采用A2O法处理含氨废水,并在混合沉淀池前增加活性炭过滤工艺,降低废水色度;将焦炉烟道废气代替载气用于煤调湿干燥机,并替代部分氮气用于除尘系统,实现废气利用。治理后的"三废"排放达到了环保要求,具有良好的经济效益和社会效益。 相似文献
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节能转筒煤调湿技术的研究和应用 总被引:1,自引:1,他引:0
我国现有焦炉生产能力居世界第一,但炼焦煤水分偏高,而且优质炼焦煤日益短缺.煤调湿技术可以降低入炉煤水分,降低炼焦耗热量,增加入炉煤堆密度,提高焦炭质量.我公司采用节能转筒煤调湿工艺技术对河南天宏焦化公司的炼焦煤进行调湿处理,取得了良好的经济和社会效益. 相似文献
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对几种焦炉烟道气余热利用技术即煤调湿技术、应用热管技术加热除盐水和副产蒸汽分别进行了分析探讨。结合山西焦化集团有限公司焦炉装置生产实际情况,对以上3种焦炉烟道气余热利用方案,分别从工艺技术的可行性、实施的难易程度、投资、效益等方面进行比对分析,提出了相关的建议。 相似文献
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以太原市煤气化股份有限公司第二焦化厂JN60型焦炉为例,介绍了立火道温度的测量方法及原理,通过实时检测燃烧室温度和相邻上升管粗煤气温度的变化,系统地分析了立火道温度波峰、波谷与炭化室的结焦状态之间的对应关系,以对调火操作、稳定焦炉温度和保证焦炭质量起到指导作用。 相似文献
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以唐山佳华煤化工有限公司6.25 m捣固焦炉为例,从焦炉产量、生产工艺参数及塌饼率的控制等方面介绍了焦炉的生产运行状况,详细分析了捣固方式的改进及改为分层捣固技术后的经济效益。采用改进的分层捣固技术,提高了煤饼的强度,降低了入炉煤水分,减少了化产污水量,降低了炼焦耗热量,提高了热工效率,并且解决了捣固焦炉的塌饼问题,可为以后国内6.25 m捣固焦炉的发展提供经验数据。 相似文献
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通过焦炉内热量平衡模型进行分析讨论,找出影响焦炉耗热量的主要影响因素;同时,根据焦化厂3#焦炉2012年元月份实际生产数据进行回归分析,建立预测焦炉耗热量与高炉煤气流量、混合比、配合煤水分等因素的数学模型。 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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为了研究焦炉多余热回收系统中能量的利用情况,依据分析理论,通过对某焦化厂实际案例的计算,对现有的余热回收方案进行分析,指出3个子系统运行过程中的能量回收的薄弱环节。结果表明:干熄焦、荒煤气、烟气余热回收系统的效率分别为55.16%、17.18%、51.75%,干熄焦系统的损主要为换热过程中产生的不可逆换热损失,荒煤气系统的损主要为出口损以及不可逆换热损失,烟道系统的损主要为烟气出口损。在此基础上依据各等级能量匹配利用的原则对原方案进行优化,并使用分析理论对其计算并分析。结果表明:优化过后的余热回收系统的总效率为58.72%,相比优化之前提高了11.07%,系统总不可逆换热损降低了155.49MJ/t干煤。 相似文献