共查询到20条相似文献,搜索用时 140 毫秒
1.
2.
本文主要以1000MW超超临界锅炉为例,简单介绍锅炉本体设计采用省煤器分组式布置、省煤器给水旁路布置、尾部烟气旁路等优化措施来满足锅炉全负荷投运SCR的要求。 相似文献
3.
4.
5.
6.
蝶形肋片省煤器在多灰烟气中的应用 总被引:1,自引:0,他引:1
目前在多灰烟气中,省煤器设计一般采用布置空间较大的顺列光管结构。然而,对已存在排烟温度偏高,省煤器磨损问题的锅炉,由于改造空间等条件的限制给这些问题的解决增加了难度。通过对蝶形肋片省煤器的产生过程、性能特点及应用前景的论述,说明了蝶形肋片省煤器是解决这类问题的一条有效途径。 相似文献
7.
目前循环流化床锅炉采用的钢管式省煤器,一般布置在对流烟道转弯后的竖井中,烟气走管间,软水走管内。省煤器由一系列蛇形换热管和集箱构成,换热管之间采用并联结构,作水平又列布置在烟道内,集箱一般布置在炉墙外,集箱和换热管在炉墙外焊接。软水由下向上顺序通过炉墙外的进口集箱、烟道内的换热管、炉墙外的出口集箱进 相似文献
8.
兰州石化公司炼油厂3.0Mt/a重油催化裂化装置的两台余热锅炉在运行中存在烟气侧运行阻力大、排烟温度高、省煤器给水入口温度低、存在尾燃等问题。采用翅片管结构省煤器、提高助燃空气温度、改造燃烧器、布置正压防爆固定旋转式蒸汽吹灰器对余热锅炉进行节能技术改造。改造后,两台锅炉炉膛压力分别由改造前的2.8kPa和2.7kPa降到1.9kPa和1.8kPa,余热锅炉烟气侧阻力降低;锅炉排烟温度由300℃降到205℃,烟气热量利用率和锅炉热效率得到提高;增设给水预热器后,省煤器给水温度及出水温度分别提高到150℃和240℃,外取热器及油浆蒸汽发生器多产蒸汽10t/h,两台锅炉总产汽量增加了60t/h,产生效益1908.42万元。 相似文献
9.
10.
11.
针对秸秆燃料的易结焦、易积灰和易腐蚀性等特性,主要介绍了一台110 t/h高温高压秸秆直燃锅炉在炉膛、过热器、省煤器和空气预热器等各个受热面从参数选取、材料选择、结构设计等各方面所采取的防治措施。 相似文献
12.
Liu Zhen-qi 《锅炉技术》1998,(5)
介绍FW双调风旋流燃烧器的结构特点和布置方式,通过试验对氧量、一次风量与煤量比、配风方式、燃烧器热功率、锅炉热负荷等因素对NOx生成量的影响。分析了该锅炉NOx排放过高的原因,必须将有关主要因素进行综合考虑。 相似文献
13.
14.
15.
M. Hasanuzzaman N.A. Rahim M. Hosenuzzaman R. Saidur I.M. Mahbubul M.M. Rashid 《Renewable & Sustainable Energy Reviews》2012,16(7):4527-4536
Energy efficiency and savings strategies in the combustion based industrial process heating has been reviewed comprehensively and presented in this paper. This work compiles latest literatures in terms of thesis, journal articles, conference proceedings, web materials, reports, books, handbooks on industrial process heating systems in the industrial sector. Different types of equipment used (i.e., recuperator, regenerators, heat wheels, heat pipes, economizers, etc.) and energy savings are reviewed in various industrial processes heating. Based on the review results, it is found that significant amounts of energy could be saved by using heat recovery system in the industrial process heating. By using recuperator up to 25% energy can be saved in the furnace. In the case of boiler, by using economizers 10% to 20% energy can be saved. Economic analysis shows that the payback period of recuperator and economizer are normally less than 2 years. It is also found that the payback period is lower when operating hour is comparatively high. 相似文献
16.
目前国家对中、低温余热资源利用的重视程度逐步提高,很多企业都使用烧结双压余热锅炉来提高整个热力循环的效率,减少环境污染。本文首先对双压余热锅炉原理进行研究后,对卧式余热锅炉和立式余热锅炉布置方式的,两种利弊和应用的场合进行研究,最后从双压余热锅炉的本体结构出发对整个系统的工作原理进行了深入的分析。 相似文献
17.
To enhance heat transfer and reduce fouling of the finned-tube surface in economizers of coal-fired power plants, heat transfer and pressure drop characteristics for H-type finned oval tube with longitudinal vortex generators (LVG) and dimples, both in-line and staggered arrangements, are studied experimentally under flue dust condition. In addition, the ash samples and heat exchanger surfaces after the test are analyzed to help understanding the ash fouling and tube wear mechanisms. Compared to the original H-type finned oval tube, the Nusselt number of H-type finned oval tube bank with longitudinal vortex generators and dimples is improved by 34.5–41.7% (in-line arrangement) and 28.1–31.7% (staggered arrangement) within the studied Reynolds numbers, while the Euler number is increased by 21.9–28.3% (in-line arrangement) and 19% (staggered arrangement) in the clean finned-tube surface state. In the stable fouling state, the Nusselt number is improved by 37.7–42.3% (in-line arrangement) and 27.8–45.1% (staggered arrangement), while the Euler number is increased by 22.9–25.2% (in-line arrangement) and 33.3–42% (staggered arrangement). The results show that the novel fin structures can both inhibit fouling and enhance heat transfer effectively. 相似文献
18.
根据复合床式循环流化床锅炉的结构特点和运行方式,研究得出其炉内传热计算方法,并编制出相应的计算机程序,可以为复合床式循环流化床锅炉的设计和运行提供理论计算依据. 相似文献
19.
20.
管壳式废热锅炉整体强度计算具有相当的复杂性,其中管板强度和管板与管子连接强度显得尤为关键。通过建立锅炉整体结构的有限元分析模型,更加全面且贴切地表征了管板、管子分布以及管板与管子连接的真实结构,从而更加详尽而准确地反映了废热锅炉整体的应力应变分布,为科学合理地设计及优化废热锅炉提供了理论指导。 相似文献