电力与能源
電力與能源
전력여능원
Power and Energy
2014年
3期
353-355
,共3页
掺烧劣质煤%供电煤耗率%定量分析
摻燒劣質煤%供電煤耗率%定量分析
참소렬질매%공전매모솔%정량분석
Mixed burning inferior coal%Coal consumption rate of power supply%Quantitative analysis
燃煤机组掺烧劣质煤，除了增加维护和维修成本外，还会影响锅炉效率、蒸汽参数、辅机电耗等指标。为了定量分析掺烧劣质煤对机组供电煤耗的影响，以12号机组不掺烧（全神木煤）工况为基准，340 g/kWh达标煤耗为标杆，分别比对240、180、120 MW三种工况下掺烧劣质煤的供电煤耗。试验结果为：240 MW电负荷，掺烧劣质煤后供电煤耗上升2．869 g/kWh；180 MW电负荷，掺烧劣质煤后供电煤耗上升3．987 g/kWh；120 MW电负荷，掺烧劣质煤后供电煤耗上升3．769 g/kWh。为此建议：要控制好掺烧大混煤的煤量，可适当掺烧些褐煤等煤种来对冲；要尽量运行高位磨煤机，通过燃烧器摆角和风烟挡板进行调整，抬高再热器出口温度；要综合考虑掺烧大混煤的比例。
燃煤機組摻燒劣質煤，除瞭增加維護和維脩成本外，還會影響鍋爐效率、蒸汽參數、輔機電耗等指標。為瞭定量分析摻燒劣質煤對機組供電煤耗的影響，以12號機組不摻燒（全神木煤）工況為基準，340 g/kWh達標煤耗為標桿，分彆比對240、180、120 MW三種工況下摻燒劣質煤的供電煤耗。試驗結果為：240 MW電負荷，摻燒劣質煤後供電煤耗上升2．869 g/kWh；180 MW電負荷，摻燒劣質煤後供電煤耗上升3．987 g/kWh；120 MW電負荷，摻燒劣質煤後供電煤耗上升3．769 g/kWh。為此建議：要控製好摻燒大混煤的煤量，可適噹摻燒些褐煤等煤種來對遲；要儘量運行高位磨煤機，通過燃燒器襬角和風煙擋闆進行調整，抬高再熱器齣口溫度；要綜閤攷慮摻燒大混煤的比例。
연매궤조참소렬질매，제료증가유호화유수성본외，환회영향과로효솔、증기삼수、보궤전모등지표。위료정량분석참소렬질매대궤조공전매모적영향，이12호궤조불참소（전신목매）공황위기준，340 g/kWh체표매모위표간，분별비대240、180、120 MW삼충공황하참소렬질매적공전매모。시험결과위：240 MW전부하，참소렬질매후공전매모상승2．869 g/kWh；180 MW전부하，참소렬질매후공전매모상승3．987 g/kWh；120 MW전부하，참소렬질매후공전매모상승3．769 g/kWh。위차건의：요공제호참소대혼매적매량，가괄당참소사갈매등매충래대충；요진량운행고위마매궤，통과연소기파각화풍연당판진행조정，태고재열기출구온도；요종합고필참소대혼매적비례。
Mixed burning inferior coal in coal-fired units will not only increase the cost of maintenance and re-pair,but also affect the indicators for efficiency of the boiler,steam parameters and auxiliary power consump-tion.To quantitative analysis of impact on the power supply coal consumption of working unit when mixed burning inferior coal,choose working condition of No.12 working unit,which didn't burning inferior coal (contains full of Shenmu Coal)and 340 g/kWh for coal consumption as a benchmark,to respectively compared with the power supply coal consumption of mixed burning inferior coal under 240 MW,180 MW,120 MW working conditions.The test result is:when mixed burning inferior coal,power supply coal consumption rose 2.869 g/kWh for 240 MW electrical load.Power supply coal consumption rose 3.987 g/kWh for 180 MW electrical load.Power supply coal consumption rose 3.769 g/kWh for 120 MW electrical load.The suggestions are:Control the quantity of mixed burning inferior coal.Appropriate to mixed burning lignite to hedge,which can specifically reduce the impact of risk after mixed burning inferior coal.Try to run high level coal pulveriz-er,and through adjust of burner angular and specific baffle to raise the outlet temperature of re-heater;Com-prehensive consider of the proportion of mixed burning inferior coal.
