广东电力
廣東電力
엄동전력
Guangdong Electric Power
2015年
9期
37-42,91
,共7页
600 MW 机组%劣质煤%掺烧%经济性%安全性%配风%低温腐蚀
600 MW 機組%劣質煤%摻燒%經濟性%安全性%配風%低溫腐蝕
600 MW 궤조%렬질매%참소%경제성%안전성%배풍%저온부식
600 MW unit%fault coal%blending combustion%economy%security%air distribution%low temperature corrosion
对某厂600 MW 亚临界机组进行掺烧高水分、低发热量劣质煤后锅炉与制粉系统的带负荷能力、安全性与经济性等进行研究，结果表明：掺烧高水分、低发热量劣质煤会降低磨煤机干燥出力，影响锅炉带负荷能力与变负荷速率，锅炉高负荷运行时要减少劣质煤的掺混比例；掺烧高水分、高硫分的劣质煤，烟气酸露点明显升高，低温腐蚀加重；对于易结焦的劣质煤，通过“炉前掺混”的方式与不易结焦煤混烧能够明显减轻其结焦；过量空气和配风方式对锅炉效率影响大，倒塔型配风方式对减少劣质煤掺烧热损失和氮氧化物(NOx )生成有利；掺烧劣质煤会降低锅炉效率，但机组整体经济效益增加。
對某廠600 MW 亞臨界機組進行摻燒高水分、低髮熱量劣質煤後鍋爐與製粉繫統的帶負荷能力、安全性與經濟性等進行研究，結果錶明：摻燒高水分、低髮熱量劣質煤會降低磨煤機榦燥齣力，影響鍋爐帶負荷能力與變負荷速率，鍋爐高負荷運行時要減少劣質煤的摻混比例；摻燒高水分、高硫分的劣質煤，煙氣痠露點明顯升高，低溫腐蝕加重；對于易結焦的劣質煤，通過“爐前摻混”的方式與不易結焦煤混燒能夠明顯減輕其結焦；過量空氣和配風方式對鍋爐效率影響大，倒塔型配風方式對減少劣質煤摻燒熱損失和氮氧化物(NOx )生成有利；摻燒劣質煤會降低鍋爐效率，但機組整體經濟效益增加。
대모엄600 MW 아림계궤조진행참소고수분、저발열량렬질매후과로여제분계통적대부하능력、안전성여경제성등진행연구，결과표명：참소고수분、저발열량렬질매회강저마매궤간조출력，영향과로대부하능력여변부하속솔，과로고부하운행시요감소렬질매적참혼비례；참소고수분、고류분적렬질매，연기산로점명현승고，저온부식가중；대우역결초적렬질매，통과“로전참혼”적방식여불역결초매혼소능구명현감경기결초；과량공기화배풍방식대과로효솔영향대，도탑형배풍방식대감소렬질매참소열손실화담양화물(NOx )생성유리；참소렬질매회강저과로효솔，단궤조정체경제효익증가。
This paper studies load carrying capability,security and economy of the boiler and coal pulverizing system after 600 MW subcritical unit co-firing with fault coal of high moisture andlowcalorific value.Results indicate that blending combus-tion with fault coal of high moisture and low calorific value may reduce drying capacity of the pulverizer and affect load car-rying capability and load variation rate of the boiler,so it is ought to reduce mixing proportion of fault coal when the boiler running with high load.Secondly,acid dew point of fuel gas obviously increases when co-firing with fault coal of high mois-ture and high sulfur content and low temperature corrosion aggravates as well.For fault coal easy to coking,it is able to ob-viously relieve coking by means of furnace mixing for co-firing with coal not easy to coking.Influence on the boiler efficien-cy is big by excessive air and air distribution mode while inverted-triangle air distribution mode is good for reducing heat loss of blending combustion with fault coal and producing NOx .In addition,blending combustion with fault coal may reduce boiler efficiency but entire economic benefit of the unit may increase.
