共查询到18条相似文献,搜索用时 125 毫秒
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介绍了灰融聚流化床粉煤气化技术的特点、工艺流程及采取的节能减排措施和效果.对常压和加压1.0 MPa灰融聚流化床粉煤气化炉生产1 000m3煤气的能耗分别与UGI富氧气化炉进行比较,结果表明:常压灰融聚流化床粉煤气化技术的能耗略低于UGI富氧气化技术,而加压1.0 MPa灰融聚流化床粉煤气化技术比常压灰融聚流化床粉煤气... 相似文献
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灰融聚CAGG流化床粉煤气化技术是我国具有自主知识产权的新型煤气化技术.介绍了该技术的气化原理、技术特点以及CAGG气化炉的结构特点;分别阐述了常压和加压灰融聚煤气化装置的工艺流程、气化指标、"三废"排放处理和装置投资情况;结果表明,新型CAGG灰融聚流化床粉煤气化技术适宜于中小型化肥、化工装置的气头改造以及燃料气、焦... 相似文献
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我国煤气化技术的特点及应用 总被引:1,自引:0,他引:1
介绍了我国煤气化技术的发展现状;论述了固定床间歇气化技术、恩德炉粉煤流化床气化技术、灰熔聚煤气化技术、壳牌煤气化技术、德士古水煤浆加压气化技术、四喷嘴对置式水煤浆气化技术等煤气化技术的工艺特点、技术优势和不足;针对煤气化技术的选择提出了相关注意事项。 相似文献
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我厂于2004年着手气化改造工程,选用灰熔聚流化床粉煤气化工艺代替重油气化工艺,以解决国内重油资源匮乏、生产难以为继、合成氨成本居高不下的窘境,提高企业的经济效益。灰熔聚流化床粉煤气化装置于2005年6月中旬试投料,目前2台灰熔聚粉煤气化炉已进人调试阶段,正在进一步优化工艺指标和设备磨合。 相似文献
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继第一套加压灰熔聚流化床粉煤气化工业示范装置(0.6MPa)试车成功之后,2009年9月3日该技术在晋煤集团10万t/a合成油示范工程项目中再获成功应用。装置各项技术指标达到设计要求,并成功实现甲醇生产全流程贯通,实现了高灰、高灰熔点、高硫“三高”无烟煤的连续稳定气化。 相似文献
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中国高灰、高硫、高灰熔融性温度煤的灰熔聚流化床气化 总被引:6,自引:0,他引:6
煤气化将会在未来中国可持续发展中占有相当重要的位置。对目前的煤气化技术和中国的煤种特性进行了描述和分析,介绍了中国科学院山西煤炭化学研究所灰熔聚流化床的研究与开发现状以及一些煤种的实验结果。结果表明:灰熔聚流化床煤气化技术适合中国高灰、高硫、高灰熔融性温度煤的气化。 相似文献
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《Fuel Processing Technology》2004,86(3):261-266
The total carbon conversion of conventional fluidized bed gasifier is relatively low (<90%) mainly because of carbon loss in fly-ash. In this paper, a new concept of integrated coal gasification—fluidized bed+entrained flow is introduced. Within this process, large partition of coal with higher reactivity is converted in an ash agglomerating fluidized bed reactor under moderate temperature (~1000 °C). The remaining small partition of coal (fly-ash) with lower reactivity is converted in a small integrated entrained flow gasifier under higher temperature (1200–1400 °C). Low carbon content ash is withdrawn in dry mode by ash agglomerating, with no need to be melted. Preliminary experimental results show that the whole system can be operated steadily, total carbon conversion reaches >95%, efficient gas (CO+H2) concentration is 78–82%. Heat exchange between two reactors has been realized, the high temperature gas from entrained flow gasifier can be cooled, and in the mean time the temperature of fluidized bed nearly keeps constant. The high-temperature ash from entrained flow gasifier can be cooled by the char in dense phase of the fluidized bed and then withdrawn in agglomerating mode. All these results prove the concept correct and feasible. 相似文献
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流化床燃烧/气化器内流动特性 总被引:1,自引:0,他引:1
以灰熔聚流化床粉煤气化工艺为背景,概括了射流床内床层动力学、射流特性以及密相中的气泡性质的研究进展。旨在为该工艺过程的工业化放大和实际操作提供必要的参考和有益的信息。 相似文献
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流化床煤气化技术的研究进展 总被引:5,自引:3,他引:2
结合流化床煤气化过程原理和循环流化床反应器开发应用状况,综述了流化床煤气化技术的进展,分析比较了目前广泛应用的3种煤气化流化床:鼓泡流化床,循环流化床及增压流化床的工艺及特点,并对工业上应用的典型的煤气化流化床(高温温克勒(HTW)及灰熔聚气化)的气化工艺流程具有的优势和存在的问题进行了较为详细的分析,并概括了流化床煤气化技术的发展趋势及应用前景. 相似文献
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Duan Feng Bao-Sheng Jin Ya-Ji Huang Bin Li Yu Sun Yiming Wu Ming-Yao Zhang 《Korean Journal of Chemical Engineering》2010,27(6):1707-1714
High temperature preheated air and steam as gasifying agent and coal gasification was performed in a pressurized turbulent
circulating fluidized bed (CFB) gasification pilot plant to investigate the pressurized gasification process and estimate
its potential. Within the scope of this paper this test facility as well as its operation behavior was described. Furthermore,
the parameter pressure has been investigated regarding its influence on the syngas composition and was presented and discussed
in the following. The results show that the gasification quality is improved at higher pressure because of the better fluidization
in the reactor. Coal gasification at a higher pressure shows advantages in lower heat value and carbon conversion. With the
gasifier pressure increased from 0.1MPa to 0.3MPa, the gas heating value is increased by 15%. Increasing the gasifier pressure
would increase the carbon conversion from 57.52% to 76.76%. Also, the dry gas yield and efficiency of cold gas increase little
with the increase of the gasifier pressure. The operating parameter of pressure exists at optimum operating range for this
specific CFB coal gasification process. 相似文献
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煤催化气化工艺中碱金属催化剂的引入加剧了气化炉的结渣,直接影响了流化床气化炉的正常操作。煤灰的烧结特性是流化床气化炉结渣的主要影响因素之一。通过自制的压差法烧结温度测定实验装置,并结合XRD 等分析表征及Factsage热力学软件模拟计算,考察了不同添加剂对煤灰烧结特性及气化性能的影响,并从矿物学角度探讨了添加剂对煤灰结渣特性及气化工艺的影响。结果表明,添加硅铝系添加剂可提高煤灰的烧结温度;相比硅系添加剂,添加高铝系添加剂对改善煤灰的烧结温度效果更明显;高铝系添加剂可作为一种高效的阻熔剂,但因在气化过程中容易同催化剂反应,导致催化剂催化性能降低,对煤的气化活性及催化剂回收率产生不利影响;添加氧化钙添加剂,煤的灰熔温度及烧结温度均增加,随氧化钙含量增加,灰熔点及烧结温度均升高,且对气化活性及催化剂回收率有良性作用;氧化钙可作为改善煤种结渣性的添加剂用于催化气化工艺中,需根据煤种性质及工艺特点确定适宜的添加量。 相似文献
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Coal is successfully gasified in the presence of a pilot flame in a modified fluidized bed. Except for the pilot flame, no external heat is required to operate this gasifier. The results showed that increasing the solid-to-air ratio in the feed increased the temperature and the products, carbon monoxide and hydrogen. About 95% of the volatile materials and 80% of the fixed carbon of the feed coal could be gasified by this pilot-flame gasification method. The ash could be efficiently separated during gasification by a distributor within the dead-zone collector of this gasifier. 相似文献