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分析引起SE-东方炉渣口压差高的主要原因是更换煤种后气化炉操作温度偏低,引起渣的流动性差导致排渣不畅。通过优化排渣流程,在线处理并优化气化炉工艺操作,提高气化炉操作温度,恢复了气化炉的正常排渣及渣口压差,保障了气化炉的正常运行。 相似文献
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《化学工业与工程技术》2017,(3):16-20
Texaco煤气化炉是气化装置的核心设备,其操作控制的首要原则就是保证气化炉的顺畅排渣。分析了Texaco水煤浆气化的反应机理,探讨了Texaco煤气化炉堵渣对气化工艺运行的影响,从熔渣黏温特性、气化炉操作温度、气化炉工艺烧嘴、气化炉激冷环等方面对气化炉堵渣问题的影响因素进行了分析,介绍了对Texaco煤气化炉堵渣问题进行判断的方法,主要包括渣口压差判断法,气体成分组成判断法,以及从锁斗温度振幅、排渣量、煤气化粗渣的残碳含量分析炉温等其他辅助判断法。根据某Texaco煤气化装置的实际运行经验,提出了控制原料煤质、控制适宜的操作温度、加强工艺烧嘴的运行管理、延长激冷环的使用寿命等预防措施,对气化炉堵渣进行预防,并结合实际情况介绍了Texaco煤气化炉堵渣后的应急处理方法。 相似文献
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天然气直烧气化炉全自动开停车及联锁系统的实现 总被引:1,自引:0,他引:1
我公司采用天然气非催化部分氧化工艺,即天然气直烧工艺,对气化炉进行重油改天然气改造。由于天然气燃烧值高、反应剧烈,气化炉操作温度、压力均较高,工艺复杂,影响开停车和正常生产的因素较多,且存在过氧易发生爆炸等危险,因此,如何顺利实现气化炉的安全开停车及联锁保护等功能,从而使设备安全、长周期运行,是气化炉由燃油改为天然气直烧需要解决的一个重要课题。 相似文献
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介绍了多喷嘴对置式水煤浆气化炉工艺流程及气化炉炉温控制的重要性。分析了气化炉炉温控制的影响因素,介绍了多喷嘴对置式新型气化炉装置操作温度的控制方法,并阐述了更换煤种和炉壁超温工况下的炉温调整方法。 相似文献
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结合渭化德士古气化装置实际运行情况,从加强原料煤质量管理、选择适当的操作温度和抓好备炉工作等3方面论述了德士古气化炉稳定运行的要点。 相似文献
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航天炉渣口压差高制约着气化炉的安全运行。介绍了航天炉的结构及工作原理,阐述了渣口压差高的表现及对气化炉的影响,分析了气化炉操作温度偏低、煤质变化、渣口盘管损坏、烧嘴设计制作不合理、烧嘴通道堵塞等造成渣口压差高的原因,并给出了相应的解决措施和事故预防措施。 相似文献
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针对低压多喷嘴对置式水煤浆气化炉在掺烧石油焦期间出现的问题,从掺烧石油焦对炉壁挂渣、气化炉操作温度和气化装置经济指标的影响3个方面进行了分析。实际运行结果表明,掺烧石油焦期间,应控制石油焦的掺烧比例稳定、焦浆粒度合适,密切关注拱顶温度的变化,以确保气化装置的稳定运行。 相似文献
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Coal chars of four coal types were gasified with carbon dioxide using a PDTF or TGA at high temperature and pressure. Test conditions of temperature and partial pressure of the gasifying agent were determined to simulate the conditions in air-blown or oxygen-blown entrained flow coal gasifiers. Coal chars were produced by rapid pyrolysis of pulverized bituminous coals using a DTF with a nitrogen gas flow at 1670 K. In gasification tests with the PDTF, gasification temperatures were 1670 K or below and partial pressures of carbon dioxide were 0.7 MPa or below. Carbon monoxide of 0.6 MPa or below was supplied for the gasification tests with the TGA.As a result, coal types showed a large difference in the char gasification rate with carbon dioxide, and this difference remained large without decreasing even in the high-temperature area when the gasification rate was controlled by pore diffusion the same as in entrained flow gasifiers. Inhibition of the gasification reaction by carbon monoxide was also observed. Reaction rate equations of both the nth order and Langmuir-Hinshelwood type were applied to the char gasification reaction with the random pore model and the effectiveness factor, and the applicability of these rate equations to air-blown and oxygen-blown entrained flow gasifiers evaluated. Gasification rate equations and kinetic parameters applicable to a pore diffusion zone at high temperature were obtained for each coal. 相似文献
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新型气流床气化炉综合了现有干湿法气流床气化炉的优点,分段设计理念,采用湿法进料和干法气化原理,特殊的激冷器结构,喷嘴设计采用空间多通道设计,煤浆和氧气喷嘴均为单通道结构且单独进料,拉长了着火点与喷嘴头部距离,气化指标好,生产能力大。 相似文献
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《Fuel》2006,85(12-13):1935-1943
This paper presents modeling of a coal gasification reaction, and prediction of gasification performance for an entrained flow coal gasifier. The purposes of this study are to develop an evaluation technique for design and performance optimization of coal gasifiers using a numerical simulation technique, and to confirm the validity of the model. The coal gasification model suggested in this paper is composed of a pyrolysis model, char gasification model, and gas phase reaction model. A numerical simulation with the coal gasification model is performed on the CRIEPI 2 tons/day (T/D) research scale coal gasifier. Influence of the air ratio on gasification performance, such as a per pass carbon conversion efficiency, amount of product char, a heating value of the product gas, and cold gas efficiency is presented with regard to the 2 T/D gasifier. Gas temperature distribution and product gas composition are also presented. A comparison between the calculation and experimental data shows that most features of the gasification performance were identified accurately by the numerical simulation, confirming the validity of the current model. 相似文献
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以褐煤为原料,对几种煤气化技术即壳牌粉煤气化技术、航天炉粉煤气化技术、GSP气化技术、BGL气化技术和五环炉气化技术的先进性及适用性进行分析;提出在褐煤的干燥和输送能够满足工业运行的前提下,优先推荐选用粉煤气流床激冷流程气化技术,符合现代煤气化技术发展方向;气化炉设置应该考虑多炉互备运行。 相似文献
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褐煤气流床气化相关问题探讨 总被引:1,自引:0,他引:1
国内现有的煤气化技术有十几种,不同的技术适用于不同的场合;随着褐煤的开发和利用,当前褐煤气化颇受关注;规模为50 000m~3/h以上的单台褐煤气化炉,干煤粉气流床技术是选择之一,其中GSP、CH0REN公司的CCG、HT-L等下喷式气化技术受到青睐;在化工应用的情况下,干煤粉气流床的激冷流程有其合理的一面。 相似文献
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