热力发电
熱力髮電
열력발전
Thermal Power Generation
2015年
8期
90-94
,共5页
300 MW机组%锅炉%富氧燃烧%离心式%烟气压缩机%转速%级参数
300 MW機組%鍋爐%富氧燃燒%離心式%煙氣壓縮機%轉速%級參數
300 MW궤조%과로%부양연소%리심식%연기압축궤%전속%급삼수
300 MW unit%boiler%oxy-fuel combustion%centrifugal%flue gas compressor%rotation speed%stage parameter
建立了离心式压缩机级内烟气压缩过程中级的能量传递、流动损失及压比等数学模型，并以300 MW机组富氧煤粉燃烧锅炉离心式烟气压缩机中压段第1级为研究对象，计算并分析了不同转速、进口烟气温度、进口烟气压力对级性能参数的影响，得到了不同工况下，级的效率、损失、等熵能量头、压比与烟气质量流量的变化关系。结果表明：稳定工况区域内，压缩机转速越高，级的损失越小，效率和压比越高且随烟气质量流量的变化幅度越大，性能曲线越陡；相对进口烟气压力，进口烟气温度对级参数的影响较大。建议在压缩机中间增设冷却器，控制进口烟气温度，以提高级的效率。
建立瞭離心式壓縮機級內煙氣壓縮過程中級的能量傳遞、流動損失及壓比等數學模型，併以300 MW機組富氧煤粉燃燒鍋爐離心式煙氣壓縮機中壓段第1級為研究對象，計算併分析瞭不同轉速、進口煙氣溫度、進口煙氣壓力對級性能參數的影響，得到瞭不同工況下，級的效率、損失、等熵能量頭、壓比與煙氣質量流量的變化關繫。結果錶明：穩定工況區域內，壓縮機轉速越高，級的損失越小，效率和壓比越高且隨煙氣質量流量的變化幅度越大，性能麯線越陡；相對進口煙氣壓力，進口煙氣溫度對級參數的影響較大。建議在壓縮機中間增設冷卻器，控製進口煙氣溫度，以提高級的效率。
건립료리심식압축궤급내연기압축과정중급적능량전체、류동손실급압비등수학모형，병이300 MW궤조부양매분연소과로리심식연기압축궤중압단제1급위연구대상，계산병분석료불동전속、진구연기온도、진구연기압력대급성능삼수적영향，득도료불동공황하，급적효솔、손실、등적능량두、압비여연기질량류량적변화관계。결과표명：은정공황구역내，압축궤전속월고，급적손실월소，효솔화압비월고차수연기질량류량적변화폭도월대，성능곡선월두；상대진구연기압력，진구연기온도대급삼수적영향교대。건의재압축궤중간증설냉각기，공제진구연기온도，이제고급적효솔。
The mathematic model for relationship between and among energy transfer,flow loss and pressure ratio in stages of centrifugal compressor during compression was established.Taking the stages in centrifu-gal flue gas compressor of a 300 MW unit oxy-coal fired boiler as the example,the effects of rotation speed, inlet gas temperature and pressure on the stage performance parameters were investigated.The correspond-ing relationship between mass flow rate and the stage efficiency,flow loss,equivalent entropy head and pressure ratio was obtained,under different working conditions.The results show that,under stable work-ing conditions,with an increase in the rotation speed,the stage flow loss decreased,the stage efficiency and pressure ratio increased and the stage performance curve became steeper.The inlet flue gas temperature af-fected more on the stage parameters comparing with the inlet pressure.It suggests that a cooler should be located in the middle of the compressor to control the inlet flue gas temperature thus to enhance the stage efficiency.
