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瑞典流体碳(Fluidcarbon)公司在马尔摩建成25万吨/年的煤水浆生产装置,这座称之为世界最大的煤炼厂,可象处理重质油那样,将煤稳定地分散在水中。燃用煤水浆比油便宜,以当量能量基准计,其费用仅为油费用的2/3。煤水浆便于贮存、运送、泵送和使用燃油设备燃烧。 相似文献
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在以重油和煤焦油为油相制备油煤浆的研究中,重点考察了温度、煤粉性质、煤粉添加量、配比和煤粉粒度等对油煤浆黏度的影响,结果表明:随温度升高,油煤浆黏度值降低,重油与煤焦油配比(u/v)为3:1时,油煤浆黏度下降速率为234.5mPa·s/℃,配比为7:1时,下降速率为302mPa·s/℃。温度变化对油煤浆黏度变化影响显著;高灰分煤粉在一定程度上利于油煤浆黏度的降低;添加含碳量高的煤有利于油煤浆黏度降低;油煤浆的黏度与煤粉的粒度关系呈“N”字型,油煤浆中最佳的煤粉添加粒度为250目~300目。 相似文献
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水煤浆作为煤炭深加工的产品,是一种低污染、高效能的新型洁净燃料。针对水煤浆的燃料特点,分析了当前水煤浆锅炉设计与运行中存在的问题,并以35 t/h锅炉为例,着重介绍了流化悬浮燃烧水煤浆锅炉的结构特点及其技术优势,详细分析了流化悬浮燃烧锅炉如何解决水煤浆在小空间燃烧易结焦、燃烧不稳定这一难题,从而真正实现了水煤浆的低温、高效洁净燃烧,对工业锅炉洁净煤技术的发展将产生深远的影响。 相似文献
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Coal-water slurry pipeline systems are in various stages of development and exhibit many similarities, but they also have several unique characteristics. Existing and proposed systems range from conventional coarse- and fine-coal slurry pipeline media to the stabilized flow and coal-water mixture slurries that are under development. The roles planned for the coal being burned and the coal slurry pipeline, combined with the advantages and disadvantages of the alternative systems, tend to determine which system is most applicable for a particular use. Principal selection criteria include transport distance, water requirements, cost, and end use. Conventional coarse-coal slurries are best suited to very short-distance applications, where low water use is possible through closed-loop operation. Conventional fine-coal slurries generally require greater preparation and dewatering costs but can be transported great distances. These two systems offer excellent opportunities for rapid implementation because they have been tested on a full-scale basis. Use of the stabilized-flow system offers opportunities for domestic combustion and export because it is cheaper than coal-water mixtures. Coal-water mixtures provide the unique capability to displace oil use in oil-fired boilers. The coal-water pipeline systems for stabilized-flow and coal-water mixtures have not yet been tested on a large-scale basis. 相似文献
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