共查询到20条相似文献,搜索用时 797 毫秒
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我公司有四台正转链条式蒸汽锅炉。为保证锅炉的安全经济运行,锅炉的排水量基本控制在给水量的10%左右。其中的连排约占总排水量的60%~70%,即锅炉总给水量的6%~7%。此连续排水含有部分闪蒸汽(即为气水混合物),温度130℃左右。经排水管流入下水道,然后输送到公司污水处理站进行处理,达标后排放,既浪费了大量的热能,又增加了污水处理因水温高而附加的负荷。故应将热能回收利用。1.热能回收措施目前,蒸汽锅炉排水热能回收技术已成熟,并有产品销售,但费用较高。结合我公司的情况,利用闲置的板式换热器及部分旧管,制做了排水热能回收系统。其工… 相似文献
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以晋城煤业集团古书院矿为例,对燃煤采暖锅炉的排污水进行了回收利用,降低了锅炉煤耗,减少了资源浪费。该矿锅炉房几年来的运行结果表明,锅炉排污水回收与利用,节能效果显著。 相似文献
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本文研究了某汽车轮胎硫化生产线的能源节能点。从锅炉的排污、硫化车间闪蒸蒸汽和冷凝水回收方案、疏水阀的优化等几个方面着手,对轮胎硫化生产过程进行研究和分析。结果表明,通过调整锅炉连排电导率设定,提高设定点,降低锅炉排污率,能有效地改善燃气消耗量降低用气成本;直排的闪蒸蒸汽和冷凝水浪费了大量的能源,通过引射装置回收直排蒸汽,可以用于现有蒸汽系统的加热,从而提高能源利用率;蒸汽输水阀的正确设计和选型直接影响设备的换热效率。 相似文献
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蒸汽锅炉改热水锅炉后的省煤器改造黑龙江省机械制造学校马文姝白奉臣杨兴成1问题提出省煤器的作用是利用锅炉尾部烟气的势量加热锅炉给水,从而可以降低排烟温度,提高锅炉热效率,节约燃料消耗量。特别是对于蒸汽锅炉,由于蒸发受热面中工质的温度等于工作压力下的饱和... 相似文献
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锅炉给水泵是汽轮发电机组的的重要辅机,它的正常运行直接影响到单元机组的安全性和经济性。本文针对梅县发电厂三期新投产的2台135MW单元机组运行中出现的电动锅炉给水泵密封水不能正常回收的问题进行分析,提出了调整及改造的实施方法。通过对给水泵密封水的回收操作方法、调整步骤进行优化,并对设备系统进行一系列技术改造后,收到了预期效果,使给水泵密封水达到正常回收,提高了机组运行的安全性和经济性。 相似文献
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“以汽定水 液位前馈”比值控制方案在二段炉出口废热锅炉液位控制上取得了满意的效果。 相似文献
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聂汉平 《工业仪表与自动化装置》2000,(3):10-13
本文介绍了模糊逻辑控制在工业燃煤链条锅炉中的应用,控制系统由单片机系统构成,实现了对汽包水位、蒸汽坟力,过乘空气系统的模糊控制,提高了锅炉的热效率和安全运行能力,减少了烟气排放对大气的污染。 相似文献
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Nonlinearity and time delay in thermal power plant processes during the period of steady state load have been reported to be efficiently compensated for by controlling the open rate of sprays and an angle of burner tilt using a conventional cascade PID controller. However, it is not easy to compensate severe nonlinearity and time delays simultaneously due to feed water and coal flow variations during load changes. This paper introduces advanced method to mitigate these problems. A predictor based on the least square support vector machine for regression (LS-SVR) algorithm is developed to efficiently compensate the nonlinearity in the boiler system, and it enables accurate modeling of the steam temperature by applying LS-SVR algorithm by using one variable, steam temperature, for the superheater and reheater systems. Moreover, the predictor enables to compensate the time delay by generating a prior control action, based on the predicted steam temperature after a certain time interval. An LS-SVR-based predictor is combined with a PID controller that uses a gain scheduler based on an anti-reset windup algorithm to enable more sensitive and efficient steam temperature control during load changes to the boiler system in a thermal power plant. A load-changing simulation is conducted, and the proposed steam temperature controller demonstrates a more stable and efficient performance than a conventional cascade PID controller. 相似文献
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Hyomin Jeong Tony Utomo Myoungkuk Ji Yonghun Lee Gyeonghwan Lee Hanshik Chung 《Journal of Mechanical Science and Technology》2009,23(9):2366-2375
A thermo vapor compressor is simply a steam ejector employed in a multi effect desalination process. A greater understanding
of flow phenomena inside an ejector plays an important role in its performance improvement. In this paper, CFD investigation
has been carried out to study the flow structure inside a steam ejector. This research revealed the influence of operating
pressures and ejector geometries on the flow structure and the performance of a steam ejector. The CFD results were verified
with available experimental data. The angle of the converging duct as the geometry parameter was varied as 0°, 0.5°, 1°, 2°,
3.5° and 4.5°. The best performance was obtained by the ejector with converging duct angle of 1°. 相似文献
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在火力发电厂实验室测定脱盐水、锅炉给水和蒸汽中铜、铁离子含量时须对水样进行预处理以使水样中的铜和铁转化成离子态,便于测量。本文介绍了一种快速消解水样中铜、铁离子的加热预处理装置。 相似文献