300MW機(jī)組各參數(shù)變化對(duì)供電煤耗

1、300mw機(jī)組各參數(shù)變化對(duì)供電煤耗的影響計(jì)算及結(jié)果匯總表一、廠用電率對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）b=0.01b/（1-0.0593）=0.0106b二、主汽溫度對(duì)供電煤耗的影響（每變化1）b=（0.88-0）b/（538-513）*100=0.000352b三、主汽壓力對(duì)供電煤耗的影響（每變化1mpa）b=（0.3-0）b/（16.67-16）*100=0.004478b四、再熱汽溫度對(duì)供電煤耗的影響（每變化1）b=（0.64-0）b/（538-514）*100=0.0002667b五、凝汽器背壓對(duì)供電煤耗的影響（每變化1kpa）b=（7.2-0）b/（13.5-5.4）*100=0.

2、008889b六、補(bǔ)水率對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）b=（1/0.99335-1）b/3*100=0.002232b七、給水溫度對(duì)供電煤耗的影響（每變化1）（1）.做功能力增加=808=（1205.3-1049.2）*0.5126/(274.7-241.9)=2.44(kj/kg)（2）.吸熱量增加q=8（1+qzr-8/q8）=4.759*（1+462.82/2071.8）=5.82(kj/kg)（3）.裝置效率降低i=（qi-）*100%/(+)=(5.82*0.468-2.44)*100%/(1218.74+2.44)=0.0233%。（4）.b=0.002232b八、飛灰可燃物

3、對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）b=0.003298b九、爐渣可燃物對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）b=0.000825b對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）十、制粉單耗對(duì)供電煤耗的影響（每變化1kwh/tm）b=0.0106*120*100*b/300000=0.000424b十一、排煙溫度對(duì)供電煤耗的影響（每變化1）b=（3.55py+0.44）*b/(100*92)=0.000561b十二、氧量對(duì)供電煤耗的影響（每變化1個(gè)百分點(diǎn)）b=0.000321b十三、凝汽器端差對(duì)供電煤耗的影響（每變化1）b=0.002702b十四、循環(huán)水泵耗電率、除塵耗電率、輸煤耗電率、除灰耗電率、對(duì)供電

4、煤耗的影響（每變化1個(gè)百分點(diǎn)）b=0.0106b十五、過熱減溫水量對(duì)供電煤耗的影響（每變化1噸/小時(shí)）1.減溫水量按1000kg/h計(jì)算2.減溫水因不經(jīng)過高加減少抽汽多做功8=jwr0r=1000*(137.1*0.3367+191.6*0.483+156.1*r=60.5126)/911910=0.2398(kj/kg)3.減溫水造成過熱吸熱量增加8qg=jwr=1000*(137.1+191.6+156.1)/911910r=6=0.5316(kj/kg)4.減溫水造成再熱吸熱量增加qzr-7=jw7/q7=1000*510*191.6/(911910*2152.3)=0.04979(kj

5、/kg)qzr-8=jw8(1-7/q7)/q8=1000*510*156.1*(1-199.1/2152.3)/(911910*2071.8)=0.03824(kj/kg)5.減溫水造成總吸熱量增加q=qg+qzr-7+qzr-8=0.5316+0.04979+0.03824=0.6196(kj/kg)6.裝置效率減小i=(-qi)/(+)*100%=(0.2398-0.6196*0.468)/(1218.74+0.2398)*100%=4.116*10-3%.7.b=0.00004116b十六、再熱減溫水量對(duì)經(jīng)濟(jì)性的影響計(jì)算1.減溫水量按1000kg/h計(jì)算2.再熱減溫水造成做功能力的減少

6、8=jw（i0-izl）-(r0r+b/2)=1000(3394.4-3026.8)r=6-137.1*0.3367+191.6*0.483+156.1*0.5126+(720.5-696.6)/2=0.1588(kj/kg)其中：jw（i0-izl）是減溫水不經(jīng)高壓缸而少做功8r0r是減溫水不進(jìn)高加減少抽汽而多做功r=63.循環(huán)吸熱量減少q=jw(i0-igs)-（izl-ijw）-*(7/q7)+(1-7/q7)(8/q8)=jw(i0-izl)-（igs-ijw）-*(7/q7)+(1-7/q7)(8/q8)8=jw(i0-izl)-r-*(7/q7)+(1-7/q7)(8r=6/q8)

7、=1000*(3394.4-3026.8)-（137.1+191.6+156.1）-(720.5-696.6)/2-510*(191.6/2152.3)+(1-199.1/2152.3)(156.1/2071.8)=-0.2297(kj/kg)其中：jw(i0-igs)是減溫水不經(jīng)鍋爐而少吸熱量jw（izl-ijw）是減溫水進(jìn)入再熱器多吸熱量*(7/q7)+(1-7/q7)(8/q8)是減溫水不經(jīng)高加排擠抽汽造成的再熱器吸熱量增加4.裝置效率減小i=(-qi)/(-)*100%=(0.1588+0.2297*0.468)/(1218.74-0.1588)*100%=0.02185%.5.b=0

8、.0002185b表：結(jié)果匯總表序號(hào)自變量名稱自變量變化單位影響函數(shù)備注1廠用電率每變化1個(gè)百分點(diǎn)b=0.0106bb：為當(dāng)前的供電煤耗；b：為對(duì)應(yīng)自變量變化單位的供電煤耗變化量。2補(bǔ)水率每變化1個(gè)百分點(diǎn)b=0.002232b3主汽溫度每變化1b=0.000352b4再熱汽溫度每變化1b=0.0002667b5主汽壓力每變化1mpab=0.004478b6給水溫度每變化1b=0.000233b7凝汽器背壓每變化1kpab=0.008889b8飛灰可燃物每變化1個(gè)百分點(diǎn)b=0.003298b9爐渣可燃物每變化1個(gè)百分點(diǎn)b=0.000825b10制粉單耗每變化1kwh/tmb=0.000424b11氧量每變化1個(gè)百分點(diǎn)b=0.00321b12排煙溫度每變化1b=0.000561b13給水泵單耗每變化1kwh/tqb=0.00322b14循環(huán)水泵耗電率每變化1個(gè)百分點(diǎn)b=0.0106b15除塵耗電率每變化1個(gè)百分點(diǎn)b=0.0106b16輸煤耗電率每變化1個(gè)百分點(diǎn)b=0