300MW機(jī)組循環(huán)水泵的在線優(yōu)化運(yùn)行田小冬,劉福君唐山熱電公司,河北唐山063029[摘要]介紹了300MW機(jī)組循環(huán)水泵在線優(yōu)化運(yùn)行的計(jì)算方法、模塊結(jié)構(gòu)及優(yōu)化實(shí)施方法。優(yōu)化系統(tǒng)投入后,解決了循環(huán)水泵起停的隨意性和盲目性,節(jié)電效果較好。[關(guān)鍵詞]300MW機(jī)組;汽輪機(jī);凝汽器;循環(huán)水泵;在線優(yōu)化[中圖分類(lèi)號(hào)]TK264.1[文獻(xiàn)標(biāo)識(shí)碼]B[文章編號(hào)]1002-3364(2008)01-083-02唐山熱電公司300MW機(jī)組汽輪機(jī)為東方汽輪機(jī)式中:De為凝汽器蒸汽負(fù)荷,kg/s;Dw為循環(huán)水流廠制造的C300/220-16.70.3/537/537型、亞臨界、一量,kg/s;h,為排汽焓;h為凝結(jié)水焓,kJ/kg。當(dāng)排汽次中間再熱兩缸兩排汽、抽汽供熱式配3臺(tái)長(zhǎng)沙水泵壓力變化不大時(shí),△h=h,-h近似不變,一般取△h=廠生產(chǎn)的60IKXC-26型立式混流循環(huán)水泵。2臺(tái)泵或2250kJ/kg。實(shí)測(cè)的不同臺(tái)數(shù)循環(huán)水泵運(yùn)行時(shí)的循3臺(tái)泵運(yùn)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(tái)數(shù)循環(huán)水泵運(yùn)行時(shí)的水泵的運(yùn)行臺(tái)數(shù),對(duì)機(jī)組運(yùn)行經(jīng)濟(jì)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(yùn)行臺(tái)數(shù)在線優(yōu)化的實(shí)施方法,以及1號(hào)機(jī)組2號(hào)機(jī)組在1號(hào)、2號(hào)機(jī)組上的應(yīng)用情況循環(huán)水泵運(yùn)行臺(tái)數(shù)1循環(huán)水流量/t·h-1177483024040284182123096041177循環(huán)水泵功率/kW1237240234981325257936041循環(huán)水泵在線優(yōu)化計(jì)算方法和步驟(3)凝汽器端差計(jì)算:(1)循環(huán)水入口水溫t1為實(shí)測(cè)值與循環(huán)水泵運(yùn)行臺(tái)數(shù)對(duì)入口水溫影響的修正值相加。試驗(yàn)測(cè)得不同臺(tái)數(shù)循環(huán)水泵運(yùn)行時(shí)修正數(shù)值見(jiàn)表1。式中:Aw為凝汽器冷卻面積(18000m2);K為總體傳表1不同臺(tái)循環(huán)水泵運(yùn)對(duì)循環(huán)水入口水溫的修正值熱系數(shù):K=14650999qu,其中循環(huán)水泵循環(huán)水泵循環(huán)水泵循環(huán)水泵循環(huán)水泵9冷卻表面清潔程度修正系數(shù),開(kāi)式循環(huán)時(shí)中=交運(yùn)行臺(tái)數(shù)由1臺(tái)改由2臺(tái)改由3臺(tái)改由2臺(tái)改0.8~0.85,閉式循環(huán)0.75~0.8,不清潔時(shí)流變至2臺(tái)變至3臺(tái)變至2臺(tái)變至1臺(tái)0.65~0.75,選取g=0.85;循環(huán)水人口溫度+2+1.5修正值/℃1.1Cw流速與管徑修正系數(shù)9((2)循環(huán)水溫升△t計(jì)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(nèi)徑;h甫△-=x12中國(guó)煤化工CNMHG二00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(zhǎng)xd6280@dtts.cnp—水溫修正系數(shù):9=1-014249(3-4)號(hào)機(jī)組Ds2號(hào)機(jī)組DCS:g=1+x-2DCS路由DCS路由器流程修正系數(shù)10-(1-4/35),x為凝汽器流程數(shù)。P雙機(jī)服務(wù)器性能計(jì)算服務(wù)器廠內(nèi)管理信息g蒸汽負(fù)荷修正系數(shù):g=8(8-2),當(dāng)dc>dc[用戶(hù)門(mén)[用2】[用戶(hù)3[用戶(hù)時(shí),=1,否則δ=dc/dc。其中,dc為單位面圖1生產(chǎn)管理系統(tǒng)網(wǎng)絡(luò)結(jié)構(gòu)積蒸汽負(fù)荷;dcs為單位面積蒸汽負(fù)荷的臨界值,dcs=(0.9-0.012t1)d;dc為設(shè)計(jì)單位面積蒸汽負(fù)荷,其值為30.1kg/m2。(4)計(jì)算不同臺(tái)數(shù)循環(huán)水泵運(yùn)行時(shí)汽輪機(jī)排汽溫度式中:t,——汽輪機(jī)排汽溫度(凝汽器壓力pk對(duì)應(yīng)的假定循環(huán)水泵臺(tái)數(shù)改變后,查表得飽和蒸汽溫度),℃C;(5)根據(jù)排汽溫度t查出對(duì)應(yīng)不同臺(tái)數(shù)循環(huán)水泵通過(guò)凝結(jié)器變工況,計(jì)算出在假定勺循環(huán)水泵運(yùn)行臺(tái)數(shù)下排汽溫度運(yùn)行時(shí)的排汽壓力p。(6)計(jì)算排汽壓力變化對(duì)機(jī)組熱耗影響。采用制造廠提供的額定工況下排汽壓力對(duì)熱耗影響的關(guān)系曲線與排汽量變化擬合方法計(jì)算。計(jì)算出汽輪機(jī)熱耗變化后對(duì)經(jīng)濟(jì)響、循環(huán)水泵耗電量增加對(duì)經(jīng)濟(jì)(7)綜合比較汽輪機(jī)熱耗與循環(huán)水泵耗功的變化給出在線優(yōu)化運(yùn)行結(jié)果。[出優(yōu)化運(yùn)行結(jié)論圖2循環(huán)水泵在線優(yōu)化程序2循環(huán)水泵在線優(yōu)化運(yùn)行實(shí)現(xiàn)循環(huán)水泵優(yōu)化運(yùn)行是在生產(chǎn)管理信息系統(tǒng)上實(shí)現(xiàn)3循環(huán)水泵優(yōu)化運(yùn)行情況的,該系統(tǒng)的網(wǎng)絡(luò)結(jié)構(gòu)見(jiàn)圖1。唐山熱電公司1號(hào)、2號(hào)機(jī)組循環(huán)水泵優(yōu)化運(yùn)行模循環(huán)水泵在線優(yōu)化運(yùn)行計(jì)算機(jī)程序見(jiàn)圖2。塊于2006年10月30日投入運(yùn)行,數(shù)據(jù)采樣和模塊運(yùn)行周期為5min。循環(huán)水泵優(yōu)化運(yùn)行指導(dǎo)畫(huà)面見(jiàn)圖3。系統(tǒng)投運(yùn)后,從根本上解決循環(huán)查看條件水泵的隨意和盲目起停,保證了凝汽機(jī)組,[機(jī)熱器真空接近最佳值,大幅降低了廠用環(huán)水運(yùn)行導(dǎo)電,提高了機(jī)組運(yùn)行經(jīng)濟(jì)性。2006年環(huán)水行方式色表示行色表永停環(huán)水系行運(yùn)行11月循環(huán)水泵電耗為064%,同期電環(huán)家壇行狀數(shù)耗為0.76%同比下降了0.12%。當(dāng)前2臺(tái)水索交圖環(huán)水耗電折量金參考文獻(xiàn)流[1]剪天聰.汽輪機(jī)原理[M].北京:水鵡⊙汽力電力出版社,1992位代號(hào)[2]C30022016.7/0.3/537/537型1#機(jī)組有功巧率汽輪機(jī)熱力特性書(shū)[Z].東方汽輪機(jī)組么環(huán)水入口溫度中國(guó)煤化工輪機(jī)設(shè)備及系統(tǒng)[M北京:CNMHG出版社,2006(下轉(zhuǎn)第88頁(yè))圖3循環(huán)水泵運(yùn)行臺(tái)數(shù)優(yōu)化指示畫(huà)面CAUSE ANALYSIS FOR STALL OF AXIAL FANS OPERATING IN PARALLELHOU Fan-jun, GENG Li", WANG Jia1. 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-er. 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 resistance②必必辦必必必必必必必必必必必必必辦必必辦必必辦少②小必辦必(上接第79頁(yè))PROBLEMS EXISTING IN THE SPRAYING SYSTEM OFLARGE TOOTH GEAR IN BALL MILLSLi Xionglodian 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 problemsuch 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少①少①必必①小必辦(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 briefly 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, aapproach 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 distribution of natural gas: distributed energy system: pipeline pressure技術(shù)交流D必必必必①必①①必②必分①辦必必辦必①必小必必①必必必(上接第84頁(yè))ON- LINE OPTIMIZED OPERATION OF THE CIRCULATING WATERPUMP FOR 300 MW UNITTIAN Xiao-dong, LIU Fu-junTangshan Thermal Power Co Ltd, Tangshan 063029, Hebei Province, PRcAbstract: The calculation method, module structure, and optimization中國(guó)煤化工 imized operation for circulting water pump of 300 Mw unit have been presented. After putting theCNMHGthe casualness and blindnessA n start-up and shutdown of circulating water pump have been overcomebetter electricity- saving effectivenesKey words: 300 Mw unit; steam turbine; condenser: circulating wateron-line optimization