热力发电
熱力髮電
열력발전
Thermal Power Generation
2015年
10期
9-14
,共6页
王群英%苏攀%张健%郝功涛%邓庆德%张琨
王群英%囌攀%張健%郝功濤%鄧慶德%張琨
왕군영%소반%장건%학공도%산경덕%장곤
锅炉%烟煤%褐煤%掺烧%热效率%安全性%经济性
鍋爐%煙煤%褐煤%摻燒%熱效率%安全性%經濟性
과로%연매%갈매%참소%열효솔%안전성%경제성
boiler%bituminous%lignite%blending combustion%thermal efficiency%safety%economy
在超超临界660 MW机组上进行了褐煤间接掺混(炉内掺混)的试验研究,从制粉系统试验和褐煤掺烧试验两方面,对系统掺烧后运行的安全性和经济性进行了评估。结果表明:中速磨煤机从研磨单一烟煤改为单一褐煤后,为了保证褐煤出力量一致,褐煤的颗粒细度稍有变大;对于收到基水质量分数为30%的褐煤,无需添加脱水装置,仅通过磨煤机内预热即可保证一次风管道内煤输送的安全性;磨煤机内阻力增加后,保证一次风进口压力并控制一次风出口温度在55~65℃,是保证磨煤机安全运行的关键;掺烧褐煤对锅炉系统热效率影响较小,当褐煤与烟煤的单价差在50元以上时,可有效降低企业运行成本。
在超超臨界660 MW機組上進行瞭褐煤間接摻混(爐內摻混)的試驗研究,從製粉繫統試驗和褐煤摻燒試驗兩方麵,對繫統摻燒後運行的安全性和經濟性進行瞭評估。結果錶明:中速磨煤機從研磨單一煙煤改為單一褐煤後,為瞭保證褐煤齣力量一緻,褐煤的顆粒細度稍有變大;對于收到基水質量分數為30%的褐煤,無需添加脫水裝置,僅通過磨煤機內預熱即可保證一次風管道內煤輸送的安全性;磨煤機內阻力增加後,保證一次風進口壓力併控製一次風齣口溫度在55~65℃,是保證磨煤機安全運行的關鍵;摻燒褐煤對鍋爐繫統熱效率影響較小,噹褐煤與煙煤的單價差在50元以上時,可有效降低企業運行成本。
재초초림계660 MW궤조상진행료갈매간접참혼(로내참혼)적시험연구,종제분계통시험화갈매참소시험량방면,대계통참소후운행적안전성화경제성진행료평고。결과표명:중속마매궤종연마단일연매개위단일갈매후,위료보증갈매출역량일치,갈매적과립세도초유변대;대우수도기수질량분수위30%적갈매,무수첨가탈수장치,부통과마매궤내예열즉가보증일차풍관도내매수송적안전성;마매궤내조력증가후,보증일차풍진구압력병공제일차풍출구온도재55~65℃,시보증마매궤안전운행적관건;참소갈매대과로계통열효솔영향교소,당갈매여연매적단개차재50원이상시,가유효강저기업운행성본。
Experimental investigations on indirect blending lignite with bituminous coal were carried out on an ultra supercritical 660 MW unit.On the basis of pulverizing system test and lignite co-combustion test, the operation safety and economy of the system after co-firing lignite was evaluated.The results show that, after the medium speed roller mill was retrofitted from grinding single lignite to single lignite coal,to en-sure the same lignite particle production,the particle size will increase a little.In term of raw lignite with moisture mass ratio of 30%,the heating process in mill can guarantee the stability and safety of coal feed-ing in the primary air pipeline,in which no additional heating device was required.After the resistance in-side the coal mill increased,the primary air inlet pressure and its outlet temperature (5 5 ℃ to 6 5 ℃)in mill are two factors to ensure the operation safety.Blending lignite affects little on the boiler thermal efficiency. When the price difference between lignite and bituminous coal reaches about 50 yuan,the operation cost in the power plant will be reduced effectively.