·¢²¼Ê±¼ä : ÐÇÆÚÈÕ ÎÄÕ»¯¹¤ÔÀíϲḴϰ×ÊÁϸüÐÂÍê±Ï¿ªÊ¼ÔĶÁb6bd3eae750bf78a6529647d27284b73f24236bf
1.00.90.80.70.6ÔÚx¨CyͼÉÏ×÷³öƽºâÏߣ¬Èç±¾Ì⸽ͼËùʾ¡£
a5dÓÉÒÑÖªµÄxD£¬xF£¬xWÔÚ¸½Í¼É϶¨³öµãa¡¢e¡¢c¡£
x0.95¾«Áó¶Î²Ù×÷ÏߵĽؾàΪD??0.271£¬ÔÚyÖáÉ϶¨
R?12.5?1³öµãb£¬Á¬½Óµãa¼°µãb£¬¼´Îª¾«Áó¶Î²Ù×÷Ïß¡£
¹ýµãe×÷qÏߣ¨´¹Ö±Ïߣ©½»¾«Áó¶Î²Ù×÷ÏßÓÚµãd¡£Á¬½Ócd
y 0.50.40.3e ¼´µÃÌáÁó¶Î²Ù×÷Ïß¡£
´Óµãa¿ªÊ¼£¬ÔÚƽºâÏßÓë²Ù×÷ÏßÖ®¼ä»æ½×ÌÝ£¬´ïµ½Ö¸¶¨·ÖÀë³Ì¶ÈÐè11²ãÀíÂ۰壬µÚ5²ãÀíÂÛ°å½øÁÏ¡£
b0.20.10.00.011cxW0.10.20.30.4xF0.5X 0.60.70.80.9xD1.0
9£®ÔÚ°åʽ¾«ÁóËþÖзÖÀëÏà¶Ô»Ó·¢¶ÈΪ2µÄÁ½×é·ÖÈÜÒº£¬Åݵã½øÁÏ¡£Áó³öÒº×é³ÉΪ0.95£¨Ò×»Ó·¢×é·ÖµÄĦ¶û·ÖÊý£¬ÏÂͬ£©£¬
Ï°Ìâ8 ¸½ ͼ
¸ª²ÐÒº×é³ÉΪ0.05£¬ÔÁÏÒº×é³ÉΪ0.6¡£ÒѲâµÃ´ÓËþ¸ªÉÏÉýµÄÕôÆøÁ¿Îª93 kmol/h£¬´ÓËþ¶¥»ØÁ÷µÄÒºÌåÁ¿Îª58.5 kmol/h£¬Åݵã»ØÁ÷¡£ÊÔÇó£¨1£©ÔÁÏÒºµÄ´¦ÀíÁ¿£»£¨2£©²Ù×÷»ØÁ÷±ÈΪ×îС»ØÁ÷±ÈµÄ±¶Êý¡£
½â£º£¨1£©ÔÁÏÒºµÄ´¦ÀíÁ¿ ÓÉÈ«ËþµÄÎïÁϺâËãÇó½â¡£ ¶ÔÓÚÅݵã½øÁÏ£¬q = 1
qn,V??qn,V??R?1?qn,D?93kmol/h
qn,D?qn,V?qn,L??93?58.5?kmol/h=34.5 kmol/h
qn,W?qn,F?qn,D
Ôò 0.6qn,F?0.95?34.5??qn,F?34.5??0.05 ½âµÃ qn,F?56.45kmol/h
£¨2£©RΪRminµÄ±¶Êý
93??R?1??34.5
R = 1.70
¶ÔÓÚÅݵã½øÁÏ£¬RminµÄ¼ÆËãʽΪ
Rmin?1?xD?(1?xD)??0.952?(1?0.95)????1.333 ???????1?xF1?xF??0.61?0.6? ÓÚÊÇ
R1.7??1.275 Rmin1.33310£®ÔÚ³£Ñ¹Á¬Ðø¾«ÁóËþÄÚ·ÖÀë±½¡ªÂȱ½»ìºÏÎï¡£ÒÑÖª½øÁÏÁ¿Îª85 kmol/h£¬×é³ÉΪ0.45£¨Ò×»Ó·¢×é·ÖµÄĦ¶û·ÖÊý£¬ÏÂͬ£©£¬Åݵã½øÁÏ¡£Ëþ¶¥Áó³öÒºµÄ×é³ÉΪ0.99£¬Ëþµ×¸ª²ÐÒº×é³ÉΪ0.02¡£²Ù×÷»ØÁ÷±ÈΪ3.5¡£Ëþ¶¥²ÉÓÃÈ«ÄýÆ÷£¬Åݵã»ØÁ÷¡£±½¡¢Âȱ½µÄÆû»¯ÈÈ·Ö±ðΪ30.65 kJ/molºÍ36.52 kJ/mol¡£Ë®µÄ±ÈÈÈÈÝΪ4.187 kJ/ (kg ?¡æ)¡£ÈôÀäȴˮͨ¹ýÈ«ÄýÆ÷ζÈÉý¸ß15 ¡æ£¬¼ÓÈÈÕôÆû¾ø¶ÔѹÁ¦Îª500 kPa£¨±¥ºÍζÈΪ151.7 ¡æ£¬Æû»¯ÈÈΪ2 113 kJ/kg£©¡£ÊÔÇóÀäÈ´Ë®ºÍ¼ÓÈÈÕôÆûµÄÁ÷Á¿¡£ºöÂÔ×é·ÖÆû»¯ÈÈËæζȵı仯¡£
½â£ºÓÉÌâ¸øÌõ¼þ£¬¿ÉÇóµÃËþÄÚµÄÆøÏฺºÉ£¬¼´
x?xW0.45?0.02qn,D?qn,FF?85?kmol/h?37.94kmol/h
xD?xW0.99?0.02¶ÔÓÚÅݵã½øÁÏ£¬¾«Áó¶ÎºÍÌáÁó¶ÎÆøÏฺºÉÏàͬ£¬Ôò
qn,V?qn,V??qn,D?R?1??4.5?37.94kmol/h?170.7 kmol/h
£¨1£©ÀäÈ´Ë®Á÷Á¿ ÓÉÓÚËþ¶¥±½µÄº¬Á¿ºÜ¸ß£¬¿É°´´¿±½¼ÆË㣬¼´
Qc?qn,V?A?170.7?30.65?103kJ/h?5.232kJ/hqm,c
Qc5.232?106??kg/h ?8.33?104kg/h cp,c(t2?t1)4.187?15£¨2£©¼ÓÈÈÕôÆûÁ÷Á¿ ¸ªÒºÖÐÂȱ½µÄº¬Á¿ºÜ¸ß£¬¿É°´´¿Âȱ½¼ÆË㣬¼´
QB?qn,V??B?170.7?36.52?103kJ/h ? 6.234kJ/hqm,h?QB
?B6.234?106?kg/h£½2.95kg/h
211311£®ÔÚ³£Ñ¹Á¬ÐøÌáÁóËþÖУ¬·ÖÀëÁ½×é·ÖÀíÏëÈÜÒº£¬¸ÃÎïϵƽ¾ùÏà¶Ô»Ó·¢¶ÈΪ2.0¡£ÔÁÏÒºÁ÷Á¿Îª100 kmol/h£¬½øÁÏÈÈ״̬²ÎÊýq=1£¬Áó³öÒºÁ÷Á¿Îª60 kmol/h£¬¸ª²ÐÒº×é³ÉΪ0.01£¨Ò×»Ó·¢×é·ÖµÄĦ¶û·ÖÊý£©£¬ÊÔÇó£¨1£©²Ù×÷Ïß·½³Ì£»£¨2£©ÓÉËþÄÚ×îÏÂÒ»²ãÀíÂÛ°åϽµµÄÒºÏà×é³Éx¡äm¡£
½â£º±¾ÌâΪÌáÁóËþ£¬¼´ÔÁÏÓÉËþ¶¥¼ÓÈ룬Òò´Ë¸ÃËþ½öÓÐÌáÁó¶Î¡£ÔÙ·ÐÆ÷Ï൱һ²ãÀíÂÛ°å¡£ £¨1£©²Ù×÷Ïß·½³Ì ´ËΪÌáÁó¶Î²Ù×÷Ïß·½³Ì£¬¼´
y??qn,L?qn,V?x??qn,Wqn,V?xW
ʽÖÐ qn,L??qqn,F?100kmol/h
qn,V??qn,D?60kmol/h
qn,W?qn,F?qn,D??100?60?kmol/h£½40 kmol/h
Ôò y??100x??40?0.01?1.667x??0.0067
6060£¨2£©×îϲãËþ°åϽµµÄÒºÏà×é³É ÓÉÓÚÔÙ·ÐÆ÷Ï൱ÓÚÒ»²ãÀíÂ۰壬¹Ê
?xW2?0.01y????0.0198 W1?(??1)xW1?0.01x¡ämÓëy¡äW·ûºÏ²Ù×÷¹Øϵ£¬Ôò
y??0.00670.0198?0.0067??Wxm??0.0159
1.6671.667ÌáÁóËþµÄËþ¶¥Ò»°ãûÓÐÒºÏà»ØÁ÷¡£
12£®ÔÚ³£Ñ¹Á¬Ðø¾«ÁóËþÖУ¬·ÖÀë¼×´¼¡ªË®»ìºÏÒº¡£ÔÁÏÒºÁ÷Á¿Îª100 kmol/h£¬Æä×é³ÉΪ0.3£¨¼×´¼µÄĦ¶û·ÖÊý£¬ÏÂͬ£©£¬ÀäÒº½øÁÏ£¨q =1.2£©£¬Áó³öÒº×é³ÉΪ0.92£¬¼×´¼»ØÊÕÂÊΪ90£¥£¬»ØÁ÷±ÈΪ×îС»ØÁ÷±ÈµÄ3±¶¡£ÊԱȽÏÖ±½ÓË®ÕôÆø¼ÓÈȺͼä½Ó¼ÓÈÈÁ½ÖÖÇé¿öϵĸªÒº×é³ÉºÍËùÐèÀíÂÛ°å²ãÊý¡£¼×´¼¡ªË®ÈÜÒºµÄt¨Cx¨CyÊý¾Ý¼û±¾Ì⸽±í
Ï°Ìâ12 ¸½ ±í ζÈt ¡æ ÒºÏàÖм״¼µÄĦ¶û·ÖÊý ÆøÏàÖм״¼µÄĦ¶û·ÖÊý ζÈt ¡æ ÒºÏàÖм״¼µÄĦ¶û·ÖÊý ÆøÏàÖм״¼µÄĦ¶û·ÖÊý 100 96.4 93.5 91.2 89.3 87.7 84.4 81.7 78.0 0.0 0.02 0.04 0.06 0.08 0.10 0.15 0.20 0.30 0.0 0.134 0.234 0.304 0.365 0.418 0.517 0.579 0.665 75.3 73.1 71.2 69.3 67.6 66.0 65.0 64.5 0.40 0.50 0.60 0.70 0.80 0.90 0.95 1.0 0.729 0.779 0.825 0.870 0.915 0.958 0.979 1.0 ½â£º£¨1£©¸ªÒº×é³É ÓÉÈ«ËþÎïÁϺâËãÇó½â¡£ ¢Ù ¼ä½Ó¼ÓÈÈ
qn,D?0.9qn,FxFxD?0.9?100?0.3(1?0.9)?100?0.3kmol/h?29.35kmol/hxW??0.0425
0.92100?29.35¢Ú Ö±½ÓË®ÕôÆø¼ÓÈÈ
qn,W?qn,L??Rqn,D?qqn,F
¹Ø¼üÊǼÆËãR¡£ÓÉÓÚq =1.2£¬ÔòqÏß·½³ÌΪ
xqy?x?F?6x?1.5 q?1q?1ÔÚ±¾Ì⸽ͼÉϹýµãe×÷qÏߣ¬ÓÉͼ¶ÁµÃ£ºxq = 0.37£¬yq = 0.71
Rmin?xD?yqyq?xq?0.92?0.71?0.6176
0.71?0.37R?3Rmin?3?0.6176?1.85
ÓÚÊÇ qn,W??1.85?29.35 ?1.2?100?kmol/h?174.3 kmol/h
xW?(1?0.9)?100?0.3?0.0172
183.8ÏÔÈ»£¬ÔÚËþ¶¥¼×´¼ÊÕÂÊÏàͬÌõ¼þÏ£¬Ö±½ÓË®ÕôÆø¼ÓÈÈʱ£¬ÓÉÓÚÀäÄýË®µÄÏ¡ÊÍ×÷Óã¬xWÃ÷ÏÔ½µµÍ¡£ £¨2£©ËùÐèÀíÂÛ°å²ãÊý ÔÚx¨CyͼÉÏͼ½âÀíÂÛ°å²ãÊý
1.00.90.80.70.61.0
aa(xq,yq)40.90.80.70.6¢Ù¼ä½Ó¼ÓÈÈ ¾«Áó¶Î²Ù×÷ÏߵĽؾàΪ
(xq,yq)4Y Y 0.50.40.30.20.10.00.0xd ¼ä½Ó¼ÓÈÈ0.50.40.30.20.1dÖ±½ÓÕôÆû¼ÓÈÈb6ebecW70.10.2x0.3F
0.40.50.60.70.80.9x1.0DX
0.00.0xcW0.10.2x0.3F0.40.50.60.70.80.9x1.0DX
¸½ ͼ1 ¸½ ͼ2
Ï°Ìâ12 ¸½ ͼ
xD0.92??0.323 R?12.85 ÓÉxD = 0.92¼°½Ø¾à0.323×÷³ö¾«Áó¶Î²Ù×÷Ïßab£¬½»qÏßÓëµãd¡£
ÓÉxW=0.0425¶¨³öµãc£¬Á¬½Ócd¼´ÎªÌáÁó¶Î²Ù×÷Ïß¡£
Óɵãa¿ªÊ¼ÔÚƽºâÏßÓë²Ù×÷ÏßÖ®¼ä×÷½×ÌÝ£¬NT = 5£¨²»º¬ÔÙ·ÐÆ÷£©£¬µÚ4²ãÀíÂÛ°å½øÁÏ¡£
¢ÚÖ±½ÓÕôÆû¼ÓÈÈ Í¼½âÀíÂÛ°åµÄ·½·¨²½ÖèͬÉÏ£¬µ«Ðè×¢ÒâxW=0.0172ÊÇÔÚxÖáÉ϶ø²»ÊǶԽÇÏßÉÏ£¬Èç±¾Ì⸽ͼËùʾ¡£´ËÇé¿öϹ²ÐèÀíÂÛ°å7²ã£¬µÚ4²ãÀíÂÛ°å½øÁÏ¡£
¼ÆËã½á¹û±íÃ÷£¬ÔÚ±£³ÖÁó³öÒºÖÐÒ×»Ó·¢×é·ÖÊÕÂÊÏàͬÌõ¼þÏ£¬Ö±½ÓÕôÆû¼ÓÈÈËùÐèÀíÂÛ°å²ãÊýÔö¼Ó¡£ÇÒÐè×¢Ò⣬ֱ½ÓÕôÆû¼ÓÈÈʱÔÙ·ÐÆ÷²»ÄÜÆðÒ»²ãÀíÂÛ°åµÄ×÷Óá£
13£®ÔÚ¾ßÓвàÏ߲ɳöµÄÁ¬Ðø¾«ÁóËþÖзÖÀëÁ½×é·ÖÀíÏëÈÜÒº£¬Èç±¾Ì⸽ͼËùʾ¡£ÔÁÏÒºÁ÷Á¿Îª100 kmol/h£¬×é³ÉΪ0.5£¨Ä¦¶û·ÖÊý£¬ÏÂͬ£©£¬±¥ºÍÒºÌå½øÁÏ¡£Ëþ¶¥Áókmol/h£¬×é³ÉxD1Ϊ0.98£¬¸ª²ÐÒº×é³ÉΪ0.05¡£´Ó¾«ÁóµÄ±¥ºÍÒºÌå¡£ÎïϵµÄƽ¾ùÏà¶Ô»Ó·¢¶ÈΪ2.5¡£Ëþ¶¥ÎªÈ«Á÷±ÈΪ3.0£¬ÊÔÇó£¨1£©Ò×»Ó·¢×é·ÖµÄ×ÜÊÕÂÊ£»£¨2£©ÖÐ
½â£º£¨1£©Ò×»Ó·¢×é·ÖÔÚÁ½¹ÉÁó³öÒºÖеÄ×ÜÊÕÂÊ ¿ÉµÃ
³öÒºÁ÷Á¿qn,DΪ20 ¶Î³é³ö×é³ÉxD2Ϊ0.9ÄýÆ÷£¬Åݵã»ØÁ÷£¬»Ø¼ä¶ÎµÄ²Ù×÷Ïß·½³Ì¡£ ÓÉÈ«ËþµÄÎïÁϺâË㣬
?A?qn,DxD1?qn,D2xD2qn,FxF?100%
qn,D2µÄ¼ÆËãÈçÏÂ
qn,F?qn,D1?qn,D2?qn,W
¼°
qn,FxF?20?0.98?0.9qn,D2?0.05?100?20?qn,D2?
Ï°Ìâ13¸½Í¼
ÕûÀíÉÏʽ£¬µÃµ½
0.85qn,D2?26.4
Ôò qn,D2?31.06kmol/hÓÚÊÇ ?A?
20?0.98?31.06?0.9?100%?95.1%
100?0.5£¨2£©Öмä¶ÎµÄ²Ù×÷Ïß·½³Ì ÓÉs°åÓëËþ¶¥Ö®¼äÁÐÒ×»Ó·¢×é·ÖµÄÎïÁϺâË㣬µÃ
qn,Vsys?1?qn,Lsxs?qn,DxD1?qn,D2xD2 £¨1£©
ʽÖÐ qn,Vs?(R?1)qn,D1?(4?20)kmolh?80kmolh
qn,Ls?Rqn,D1?qn,D2??3?20?31.06?kmol/h?28.94kmol/h
½«ÓйØÊýÖµ´úÈëʽ£¨1£©²¢ÕûÀí£¬µÃµ½
ys?1?0.362xs?0.5944
14£®ÔÚ³£Ñ¹Á¬Ðø¾«ÁóËþÖзÖÀëÁ½×é·ÖÀíÏëÈÜÒº¡£¸ÃÎïϵµÄƽ¾ùÏà¶Ô»Ó·¢¶ÈΪ2.5¡£ÔÁÏÒº×é³ÉΪ0.35£¨Ò×»Ó·¢×é·ÖµÄĦ¶û·ÖÊý£¬ÏÂͬ£©£¬±¥ºÍÕôÆø¼ÓÁÏ¡£ÒÑÖª¾«Áó¶Î²Ù×÷Ïß·½³ÌΪy = 0.75x+0.20£¬ÊÔÇó£¨1£©²Ù×÷»ØÁ÷±ÈÓë