300 MW 機組循環(huán)水泵的在線(xiàn)優(yōu)化運行

300 MW機組循環(huán)水泵的在線(xiàn)優(yōu)化運行田小冬,劉福君唐山熱電公司,河北唐山063029[摘要] 介紹了300 MW機組循環(huán)水泵在線(xiàn)優(yōu)化運行的計算方法、模塊結構及優(yōu)化實(shí)施方法。優(yōu)化系統投入后,解決了循環(huán)水泵起停的隨意性和盲目性,節電效果較好。[關(guān)鍵詞] 300MW機組;汽輪機;凝汽器;循環(huán)水泵;在線(xiàn)優(yōu)化[中圖分類(lèi)號] TK264. I[文獻標識碼] B[文章編號] 1002 - 3364(2008)01 - 0083 - 02唐山熱電公司300 MW機組汽輪機為東方汽輪機式中:Dc為凝汽器蒸汽負荷,kg/s;Dw為循環(huán)水流廠(chǎng)制造的C30/220- 16. 7/0. 3/537/537型、亞臨界、- -量,kg/s;h,為排汽焓;h。為凝結水焓,kJ/kg。當排汽次中間再熱.兩缸兩排汽、抽汽供熱式,配3臺長(cháng)沙水泵壓力變化不大時(shí),Oh=h,- he 近似不變,一般取Oh=廠(chǎng)生產(chǎn)的60LKXC - 26型立式混流循環(huán)水泵。2臺泵或2 250 kJ/kg。實(shí)測的不同臺數循環(huán)水泵運行時(shí)的循3臺泵運行時(shí),凝汽器真空提高,供電煤耗下降,但循環(huán)環(huán)水流量和循環(huán)水泵總耗電量見(jiàn)表2。水泵耗電量大,使供電煤耗上升。因此，合理安排循環(huán)表2不同臺數循環(huán)水泵運行時(shí)的水泵的運行臺數,對機組運行經(jīng)濟性具有重要意義。本循環(huán)水流量和循環(huán)水泵總耗電量文介紹了循環(huán)水泵運行臺數在線(xiàn)優(yōu)化的實(shí)施方法,以及項目，1號機組2號機組循環(huán)水系運行臺數123廠(chǎng)23在1號、2號機組上的應用情況。循環(huán)水流量/t*h-I 17748 30240 40284 18212 30 96041 177循環(huán)水泵功率/kW 1237 2402 3498 1325 2579 3 6041循環(huán)水泵在線(xiàn) 優(yōu)化計算方法和步驟:(3)凝汽器端差8t計算: .(1)循環(huán)水人口水溫L為實(shí)測值與循環(huán)水泵運行8=一xA臺數對入口水溫影響的修正值相加。試驗測得不同臺eT8IF一1數循環(huán)水泵運行時(shí)修正數值見(jiàn)表1。式中:Aw為凝汽器冷卻面積(18000 m?);K為總體傳表1不同臺循環(huán)水泵運對循環(huán)水入口水溫的修正值熱系數:K= 14 650qpw qqoqs ,其中:支循環(huán)水泵循環(huán)水泵循環(huán)水泵 循環(huán)水泵循環(huán)水泵φ-冷卻表面清潔程度修正系數,開(kāi)式循環(huán)時(shí)q=不由1臺改由2臺改由3臺改由2臺改0.8~0.85,閉式循環(huán)0. 75~0.8,不清潔時(shí)充運行臺數變至2臺變至3臺 變至2臺變至1臺0.65~0.75,選取φ=0.85;循環(huán)水入口溫度修正值/C+2+1.5-1.50.12q(1+0.152)q-一流速與管徑修正系數:q°=(會(huì ))力(2)循環(huán)水溫升Ot計算由熱平衡方程可求得: .其中,Cw為循環(huán)水流速; d為冷卻水管內徑;1電DcX(h,-h)為循環(huán)水入口水溫。DwX4. 187作者簡(jiǎn)介:田小冬 ,唐山熱電公司副總工程師兼發(fā)電部部長(cháng)。八E-mail:txd6280@dtts. cng.-水溫修正系數:=1-.42√2(35-t1)21號機組DCS 2號 機組DCS1 000DCS路由器 |[ DCS路由器qo---流程修正系數:q.=1+T(1 - t:/35),z為凝PI雙機服務(wù)器]C性能計算服務(wù)器汽器流程數。廠(chǎng)內管理信息ps一 蒸汽負荷修正系數:φs=δ(δ- 2),當dc> de'系統(MIS)網(wǎng)l用戶(hù)用戶(hù)2][用戶(hù)3用戶(hù)]時(shí),δ=1,否則8=dc/dc。其中,dc為單位面圖1生產(chǎn)管理系統網(wǎng)絡(luò )結構積蒸汽負荷;de°為單位面積蒸汽負荷的臨界值,de =(0.9-0.012t )de ;dc'為設計單位面從實(shí)時(shí)數據庫中獲取計算所毒數據積蒸汽負荷,其值為30. 1 kg/m2.(4)計算不同臺數循環(huán)水泵運行時(shí)汽輪機排汽溫從給定數據中獲取計算所需數據度:t.=t+Ot+8t式中:,一汽輪 機排汽溫度(凝汽器壓力px對應的出箱壞水入口水溫、循環(huán)水量變化飽和蒸汽溫度),C;(5)根據排汽溫度1,查出對應不同臺數循環(huán)水泵通過(guò)凝結器變工況，計算出在假定的循環(huán)水泵運行臺數下排汽溫度運行時(shí)的排汽壓力p。。(6)計算排汽壓力變化對機組熱耗影響。采用制由排汽溫度計算出排汽樂(lè )力變化由排汽壓力變化，計算出對汽輪機熱耗的影響造廠(chǎng)提供的額定工況下排汽壓力對熱耗影響的關(guān)系曲線(xiàn)與排汽量變化擬合方法計算。計算出汽輪機熱耗變化后對經(jīng)濟性的影啊、循環(huán)水泵耗電量增加對經(jīng)濟性的影響(7)綜合比較汽輪機熱耗與循環(huán)水泵耗功的變化，給出在線(xiàn)優(yōu)化運行結果。給出優(yōu)化運行結論團2循環(huán)水泵在線(xiàn)優(yōu)化程序 :2循環(huán)水泵在線(xiàn)優(yōu)化運行實(shí)現循環(huán)水泵優(yōu)化運行是在生產(chǎn)管理信息系統上實(shí)現3循環(huán)水泵優(yōu)化運行情況的,該系統的網(wǎng)絡(luò )結構見(jiàn)圖1。唐山熱電公司1號、2號機組循環(huán)水泵優(yōu)化運行模循環(huán)水泵在線(xiàn)優(yōu)化運行計算機程序見(jiàn)圖2。塊于2006年10月30日投人運行,數據采樣和模塊運行周期為5 min。循環(huán)水泵優(yōu)化運行指導畫(huà)面見(jiàn)圖3。系統投運后,從根本上解決循環(huán)百查名條件水泵的隨意和盲目起停,保證了凝汽機組?；貦C組工重牧」器真空接近最佳值,大幅降低了廠(chǎng)用O鹵環(huán)術(shù)無(wú)房行把堂電,提高了機組運行經(jīng)濟性。2006 年當前灣環(huán)水策運行方式(紅色表示運行，是色表示停止)1號浦環(huán)水豪運行2號佛環(huán)水柔送行3號德環(huán)水蒙運行11月循環(huán)水泵電耗為0.64%，同期電環(huán)水茶運行方式優(yōu)化建議耗為0, 76%,同比下降了0. 12%。T環(huán)水象百新運行狀者優(yōu)化計在區同蔡當前26潘環(huán)水聚運行200元/小時(shí)203.77元/小時(shí)[參考文獻]流就定3臺鋪環(huán)水栗運行1] 剪天聰.汽輪機原理[M].北京:水-循環(huán)永茶雪托電斯金部?jì)?yōu)化運行承農益379.22元/小時(shí)66.72元/小時(shí)312.49元/小時(shí)力電力出版社,1992.熱南環(huán)水蜜和康K景實(shí)時(shí)熟務(wù)力政務(wù)單位代號[2] C300/220 - 16. 7/0. 3/537/537型10機舊有功功車(chē)汽輪機熱力特性書(shū)[Z]東方汽輪機電”101898.63kPa廠(chǎng),2001.1都機組制追環(huán)水入口溫度10.171日機組B制事壞水入口溫度10.24[3]吳季蘭. 汽輪機設備及系統[M].北京:8中國電力出版社,006.(下轉第88頁(yè))八圈3循環(huán)水泵運行 臺數優(yōu)化指示畫(huà)面CAUSE ANALYSIS FOR STALL OF AXIAL FANS OPERATING IN PARALLELHOU Fan- jun' ,GENG Li, WANG Jia - xin'1. Shandong Electric Power Research Institute, Jinan 250002，Shandong Province, PRC2. Huangtai Themal Power Plant, Jinan 250100, Shandong Province, PRCAbstract:The stall of a forced draft fan and a primary air fan for boiler no. 2 in one power plant has been analysed. Through test andinspection, it was found that the main cause leading to stall of the forced draft fan is reversely installed the outlet guide blades, andthat leading to stall of the primary air fan is most higher ventilation resistance and most higher outlet temperature of the coal pulveri-zer. After retrofitting, no stall appears again on the said forced draft fan and the primary air fan.Key words:axial fan; stall; guide blades; coal pulverizing system; ventilation resistance(上接第79頁(yè))PROBLEMS EXISTING IN THE SPRAYING SYSTEM OFLARGE TOOTH GEAR IN BALL MILLSLI Xiong :Guodian Anshun Power Plant, Anshun 561000 ,Guizhou Province, PRCAbstract: In operation of the spraying system for large tooth gear in the ball mills at Guodian Anshun Power Plant, some problems,such as troubles of the spraying oil pump frequently occurred, and the reversal valve of the spraying head can't automatically opera-ted etc. ，have often appeared. For this, analysis has been carried out, and corresponding measures being put forward. After imple-mentation, the troubles have been substantially reduced, ensuring normal operation of the system.Key words; ball mill; tooth gear; spraying oil pump; reversal system四0004000000000000400040.14(上接第82頁(yè))COORDINATING APPLICATION OF FUEL GASCOMPRESSOR ON MICRO - GAS - TURBINEZUO Zhi -yuan, LI Xi-ya, YANG Xiao- xiDongguan College of Science & Technology ，Dongguan 523808 , Guangdong Province, PRCAbstract:The influence of fuel gas pressure upon the performance of micro - gas - turbine has been brielly discussed, the developmentsituation of fuel gas compressor applied in coordination with micro - gas - turbine being presented. Combined with actual situation ofthe designed pressure in pipelines of the natural gas transportation and distribution system and the end - pressure of customers, anapproach to the influence of fuel gas compressor upon the strategic decision of a micro - gas - turbine project has been made, and somerecommendations for equiping fuel gas compressor being put forward.Key words:fuel gas compressor; micro- gas - turbine; transportation and distibution of natural gas; distributed energy system; pipeline pressure交(上接第84頁(yè))流ON - LINE OPTIMIZED OPERATION OF THE CIRCULATING WATERPUMP FOR 300 MW UNITTIAN Xiao- dong, LIU Fu- jun電Tangshan Thermal Power Co Ltd, Tangshan 063029, Hebei Province, PRCAbstract: The calculation method, module structure, and optimization - implementing method of the on - line optimized operation for circulating water pump of 300 MW unit have been presented. After putting the said optimization system into operation, the casualness and blindness八in start - up and shutdown of circulating water pump have been overcome, having better ectricity - saving ffectiveness.Key words:300 MW unit; steam turbine; condenser; circulating water pump; on - line optimization