自备热电厂的热经济性指标分析.doc

2007 2 1 49, (, 255052) , ; ; ; TK 11 + 2 B 1008 - 5122 (2007) 01 - 0049 - 05Analysis on thermal economic indexes ofca ptive stea m and po wer plantGEN G Ho ng mei , ZHAN G Zo ng junAbstract : Co mbined wit h t he analysis o n examples of t her mal eco no my indexes f ro m a cap tive steamand power plant , t hro ugh analysis and estimatio n fo r different perfo r mances of heat supply f ro m steamand power plant , co nclusio ns are o btained fo r t he increase of t her malized power generating ratio andfo r t he decrease of rated coal co nsump tio n fo r heat supply and power supply. U nder t he co nditio n ofmeeting demands f ro m client s , heat supply parameters are reduced as lower as po ssible so t hat coalco nsump tio n ratio will be decreased by applying lower p ressure no n adjustable at t racted steam to heatt he feedwater .Key words : t her mal eco no my ; rated coal co nsump tio n ; integrated t her mal power p ro ductio n ; energy saving0 5 3 ,5 382M Pa,450 ,3 75,t / h,150 ,85%,275 t / h ,150 ,907 % 3 1C12 - 3 43/, 0981, 102 t / h ,60 t /h ,2 B6 - 3 43/ 0 981 2006 - 06 - 236 M W , ( 1971 - ) , , , 92 2 t / h ,3 43 MPa ,435,21 B1 5 -1 . 3/ 0 2 50(01 # ) ;,13 076 t ,41 605 GJ2 30 t 60 t 1 (3) 75 t /h 5 8M Pa 130 ,550 kJ / kg ,222 999 t ,122 650 GJ (4) :42 876 t , , 3 25(1) MPa435,33076 kJ/ kg ,141 817 GJ ,= -3 % ,84 28 % + = 551 854 GJ (2) 0 981(5) = / M Pa ,310 ,3 063 kJ / kg ; = 413 951/ 551 854 = 75 0 % 0 9 M Pa ,300 ,2 4 3 054 kJ / kg ;0 7 M Pa, ,280 ,3 018 kJ / kg (3) 20 %(4 ) 23 061 t, 413 951 GJ 2 (1) = 20 % ,(2) d = / =297 8 (1 - 75 %) / 1489 = 5 00 %(3) r = / =2 1 297 8 75 % 104 / 413951 = 5 40 k Wh/ GJ2 B6 :2 5 65 283 t + 58 732 t = 124 015 t,=01 # :13 076 tC12 :24 605 t + - ,23 061 t 2 B6 = 2 B6-01 # = 110 939 t17296 t ,5 765 t ()= 2 B6 +C12 = 135 544t= 17296 000/ 413 951 = 41 78 kg/ GJ= 5 765 000/ 14 890 000 = 0 387 kg/ kWh:01 # 1 # 2 # = 5 765 000/ (14 890 000 - 14 890 000 ,5 %) = 0 408 kg/ k Wh2 2 :1489 kWh ,3 1 191 2 k W h , 297 8 k Wh 3 1 B6 2 3 ,( )(1) B6 C12 B6 ,C12 3 25M Pa 435 ,3 307 6 kJ / kg ,:3 1 1 65 283 + 58 732 + 49 613 = 173 628 tB6 0953,:14 48 kg/ k Wh , 6 M W173 628 3 307 6 10 - 3 = 574 292 GJ,:(2) 01 # 1 3514 48 6 000/ 1 000 = 86 88 t / hM Pa , 364 , 3181 8 kJ / kg , ,7012007 2 1 51,293 kJ / kg 150 5 09 M Pa :635 kJ / kg , 16 47 12 000 8883 % 3 063 3 % ,10 -6 = 537 75 GJ/ h:1 03 (635 - 293) / 3 063 = 11 50 %12 000/ 537 75 = 22 32 k Wh/ GJ:C12 ,1 - 11 50 % = 88 50 %5 % ,0 981 M Pa 14 48kg/ kW h , 6 :M W :22 32 (1 + 5 %) = 23 44 k Wh/ GJ14 48 6 000 88 50 % 3 063 10 - 6 = 235 51 GJ / h3 2 2 435 3 305 kJ /kg ,:0 7 M Pa ,280 ,3 018 kJ / kg ,6 000/ 235 51 = 25 . 47 k Wh/ GJ:3 1 2 3 305 - 3 018 = 287 kJ / kgB6 ,:,B6 1250 kg/ kWh ,3 600/ (287 0 96 0 97 0 97) = 13 89 kg/ kWh:C12 70 ,293 kJ / kg ,1 - 1 03 (635 - 293) / 3 018 = 88 67 %135 ,565 kJ / kg ,6 M W :3 % ,:12 5 6 000 88 67 % 3 018 10 - 6 = 200 7 GJ / h1 - 1 03 (565 - 293) / 3 018 = 90 72 %:, 12M W 6 000/ 200 7 = 29 . 90 k Wh/ GJ:,B6 13 89 12 0000 907 2 3 018 10 - 6 =0 981 M Pa 0 7 M Pa,456 36 GJ / h:(29 90 - 25 47) / 25 47 = 17 4 %12 000/ 456 36 = 26 . 30 k Wh/ GJ,C12 ,5 % ,:3 2 C12 26 30 1 05 = 27 62 k Wh/ GJ3 2 1 4 C12 C12 4 1 0 981 M Pa 310 3063kJ / kg ,(1) C12 24 605t , 3 43 M Pa 435 3 305 kJ / kg75 365 GJ ,:23 44 75 365 = 1 766 556 k Wh3 305 - 3 063 = 242 kJ / kg(2) B6 110 939 t , :339 806 GJ ,:3 600/ (242 0 96 0 97 0 97) = 16 47 kg/ k Wh25 47 339 806 = 8 654 859 k Wh:0 96 ;(3) 2 B6 1 C12 0 87 10 421 415 k Wh ,:C12 B6 ,14 890 000 - 10 421 415 = 4 468 585 k Wh88 50 % (4) bdr:0 981 M Pa 310 ,12 M Wbdr = 3 600/ (29 308 0 95 0 96 0 97 111520 842 8) = 0165 kg/ k Wh:(5) C12 brp = 3412/ (glgd) +rbdp4 812 kg/ k Wh ,C12 gl ,84 28 %;:gd ,0 98 ;4 812 (3 305/ 0 98 - 635) = 13 173 kJ / k Whr ,5 40k Wh/ GJ ;dp(6) b 0 281 kg/ kWh 3 % ,84 28% , C12brp : bnd:brp = 34 12/ (0 842 8 0 98) + 5 40 bnd = 13 173/ (29 308 0 97 84 28 %) =0 55 kg/ k Wh(7) bdp :0 281 = 42 83 kg/ GJ,brp : bdp = (0 . 165 10 421 415 + 0 . 55 4 468 585) /14 890 000 = 0 281 kg/ k Whbrp = 34 12/ (0 842 8 0 98) +5 40 0 233 = 42 57 kg/ GJ(8) bgp :6 bgp = bdp (1 - r) / (1 - ) = 0 281 1 -(20 % - 5 %) / (1 - 20 %) = 0 299 kg/ k Wh6 1 41 78kg/ GJ , :r ;0 408 kg/ k Wh ,4 2 = + = 14 890 000 (1 - 20 %) 0 . 408 10 - 3 +0981M Pa0 7M Pa ,B6 17 8% ,41 78 413 951 10 - 3 = 22 155 t23061 t ,:906 t ,4 % ,10 421 415 117 8 % = 12 276 427 k Wh6 2 := + = 1 489 104 - 12 276 427 = 2 613 575 k Whbdp :bdp = (0 . 165 12 276 427) + 0 55 2 613 575) /14 890 000 = 0 233 kg/ k Whbgp :bgp = bdp (1 - r) / (1 - ) = 0 . 234 1 -(20 % - 0 050) / (1 - 20 %) = 0 248 kg/ k Wh14 890 000 (1 - 20 %) 0 299 10 - 3 +42 . 83 135 544 3 063 10 - 6 = 21 344 t6 3 = + = 14 890 000 (1 - 20 %) 0 248 10 - 3 +42 57 135 544 3 018 10 - 6 = 20 368 t7 5 20011 ,brp1 /kg( k Wh) - 1kg( k Wh) - 1kgGJ - 1tkJ kg - 10 . 3870 . 40841 . 7823 0613 0540 . 2810 . 29942 . 8321 3443 0630 . 2330 . 24842 . 5720 368