共查询到18条相似文献,搜索用时 765 毫秒
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孤东采油厂注汽锅炉热效率测试分析显示,在平均注汽干度70%情况下,平均吨汽耗油量达68kg,比胜利石油管理局下发的湿蒸汽发生器标准(Q/SL0128-88)中规定的65kg高出3kg,但平均热效率只有84.5%,造成注汽成本偏高.对两台锅炉的排烟温度、过剩空气系数等进行测试表明,锅炉排烟温度高、过剩空气系数大,雾化参数不匹配,是影响热效率低,进而导致吨汽耗油高的主要因素.采取以下方法提高燃油热效率:强制停炉清灰,安装给水预热器,定期更换对流段腐蚀和结垢严重的翅片管,有效降低排烟温度;优化风门开度、油阀开度、燃油压力,确定合理的过剩空气系数;确定合理油温、合理雾化压力、合理油压,从而确定合理的雾化压力参数.上述措施实施后,在平均注汽干度70%情况下,吨汽耗油量为64.2kg,平均热效率为86.68%,节省燃油382.8t,产生直接经济效益114.8万元. 相似文献
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本文根据锅炉燃烧理论,分析了影响锅炉运行热效率的主要因素及热效率与空气过剩系数的关系,提出一种简化的外推内插自寻优法,找出最佳值的空气过剩系数,达到控制燃烧的最佳送风量,使锅炉运行热效率较高的目的。并以实例证实了该方法是可行的,节能效果是显著的。 相似文献
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本文针对稠油热力开发在用23t/h工业注汽锅炉燃烧渣油过程中出现的炉管结渣和积灰严重、导致热效率下降的状况,通过技术调研,根据弱爆炸吹灰原理,经过优化设计,首次在稠油油田注蒸汽锅炉上应用弱爆吹灰技术,确保注汽锅炉的高效运行,有明显的节能效果。 相似文献
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对大连石化公司自备电厂锅炉和汽轮发电机组进行全面的测试,在此基础上进行了锅炉正、反平衡计算,汽轮机机相对内效率、汽轮机械效率和汽机发电机效率的计算,综合各项数据,得出了热电厂余热资源的综合热效率,并分析了热效率低的原因。 相似文献
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Oguz Borat 《Energy Conversion and Management》1982,22(1):13-18
An open cycle gas turbine with a heat exchanger and its modifications have been studied. These modifications include the combinations of the gas turbine with a steam injection system and the gas turbine with a closed cycle steam turbine. The steam is generated by a waste heat boiler. It was found that in both cases the efficiency and the net output of the gas turbine increased considerably, of the order of 20–40%. In order to define the superiority regions of the systems studied on various ranges of power output, an economic analysis per unit power has been done. For short duration, intermittent type of operation the steam injection was found superior. Above this mode of operation, the operational modes of electric base and continuous were covered by the gas turbine combined with the steam turbine. 相似文献
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运用实验方法首次对蒸汽喷射泵式蓄热器进行了实验研究。实验结果表明,和常规蓄热系数相比,蒸汽喷射泵式蓄热器具有较强的锅炉负荷平衡能力;能有效提高蓄热器单位水容积的蓄热量,并具有较强的锅炉负荷调节能力,可取代常规蓄热系统中的电动调节阀,在实际应用中进行负荷调节。 相似文献
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Waste heat recovery (WHR) is crucial to the efficiency improvement of natural gas‐fired boiler systems. Two‐stage WHR systems based on the natural gas‐fired boiler were analyzed from the viewpoints of thermal efficiency and heat transfer irreversibility. An overall entransy dissipation‐based thermal resistance was derived to evaluate the irreversibility of WHR, including the entransy dissipations during condensation and in absorption heat pump (AHP). Compared with the basic WHR system, the two‐stage WHR systems have higher boiler efficiency and less irreversibility. The air‐humidified system recycles both the heat and vapor in flue gas, while the unutilized latent heat in the recovered vapor causes the boiler to be less efficient than the AHP system. Investigation on heat exchanger effectiveness of two‐stage WHR systems illustrated: in the two‐stage WHR system with air humidification, the increasing effectiveness of both heat exchangers could effectively increase boiler efficiency and reduce heat transfer irreversibility. In the two‐stage WHR system with AHP, boiler efficiency has a local optimum when the dew point occurs near the outlet of the first heat exchanger; increasing the second heat exchanger effectiveness is more efficient in improving boiler efficiency. The present work may provide available references and guidance for the design and optimization of the two‐stage WHR systems. 相似文献
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降低燃气锅炉排烟热损失方法探讨 总被引:4,自引:0,他引:4
燃用天然气的锅炉其排烟温度较高,除带走大量显热之外,烟气中还存在大量水蒸汽的潜热,若将这两部分热量充分回收,则将大幅度提高锅炉热效率。文章在对天然气的燃烧特性计算的基础上,分析燃气锅炉烟气潜热回收的效果和需要解决的问题。 相似文献