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[Ãß°¡]Pump Minimum Continuous Flow °ü·ÃÇÏ¿©.
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kornight
15-01-02 16:13
±×¸²°ú °°Àº ÇüÅ·ΠMCF Line ¹× Valve¸¦ ¼³Ä¡ÇÒ °æ¿ì Pump Discharge Flow ControlÀ» µÎ ±ºµ¥¼ Çϱ⠶§¹®¿¡
°£¼·ÀÌ »ý±â°Ô µË´Ï´Ù. (MCF Line ¹× Product/Reflux Line)
MCF LineÀÇ Flow Controler¿Í LPG Product/Reflux Flow RateÀ» ÇϳªÀÇ Controler°¡ ¸Ã°Å³ª,(Split range µîÀ¸·Î)
¿©·¯°³ÀÇ FC¸¦ cascade ÇÏ¼Å¾ß ÇÒ °Í °°½À´Ï´Ù.
ȤÀº, MCF Line ´ë½Å¿¡ Reflux Line C/V¿¡ interlock À» °É¾î¼ MCFó·³ µ¿ÀÛÇϵµ·Ï ÇÏ´Â ¹æ¾Èµµ ÀÖ½À´Ï´Ù.
MCF LineÀ» µû·Î µÎ´Â °Íº¸´Ù Â÷¶ó¸® ±×ÆíÀÌ ³´°Ú½À´Ï´Ù.
¸ðµç°Ô ±ÍÂú´Ù¸é MCF Line¿¡ Control Valve ´ë½Å Restricted orifice¸¦ ¼³Ä¡ÇÏ´Â ¹æ¹ýµµ ÀÖ°ÚÀ¸³ª,
Pump Size°¡ ÇÊ¿ä ÀÌ»óÀ¸·Î Ä¿Áú ¼ö ÀÖ°í µ¿·Âºñ°¡ ³¶ºñµÉ ¼ö ÀÖ½À´Ï´Ù.
P&ID¿¡¼ FY·Î Ç¥ÇöµÈ item ÀÌ ¹» ÀÇ믜 ÇÏ´ÂÁö´Â Àß ¸ð¸£°Ú³×¿ä...
Actuator ´Â ¾Æ´Ñ °Í °°Àºµ¥.
±×¸²°ú °°Àº ÇüÅ·ΠMCF Line ¹× Valve¸¦ ¼³Ä¡ÇÒ °æ¿ì Pump Discharge Flow ControlÀ» µÎ ±ºµ¥¼ Çϱ⠶§¹®¿¡ °£¼·ÀÌ »ý±â°Ô µË´Ï´Ù. (MCF Line ¹× Product/Reflux Line) MCF LineÀÇ Flow Controler¿Í LPG Product/Reflux Flow RateÀ» ÇϳªÀÇ Controler°¡ ¸Ã°Å³ª,(Split range µîÀ¸·Î) ¿©·¯°³ÀÇ FC¸¦ cascade ÇÏ¼Å¾ß ÇÒ °Í °°½À´Ï´Ù. ȤÀº, MCF Line ´ë½Å¿¡ Reflux Line C/V¿¡ interlock À» °É¾î¼ MCFó·³ µ¿ÀÛÇϵµ·Ï ÇÏ´Â ¹æ¾Èµµ ÀÖ½À´Ï´Ù. MCF LineÀ» µû·Î µÎ´Â °Íº¸´Ù Â÷¶ó¸® ±×ÆíÀÌ ³´°Ú½À´Ï´Ù. ¸ðµç°Ô ±ÍÂú´Ù¸é MCF Line¿¡ Control Valve ´ë½Å Restricted orifice¸¦ ¼³Ä¡ÇÏ´Â ¹æ¹ýµµ ÀÖ°ÚÀ¸³ª, Pump Size°¡ ÇÊ¿ä ÀÌ»óÀ¸·Î Ä¿Áú ¼ö ÀÖ°í µ¿·Âºñ°¡ ³¶ºñµÉ ¼ö ÀÖ½À´Ï´Ù. P&ID¿¡¼ FY·Î Ç¥ÇöµÈ item ÀÌ ¹» ÀÇ믜 ÇÏ´ÂÁö´Â Àß ¸ð¸£°Ú³×¿ä... Actuator ´Â ¾Æ´Ñ °Í °°Àºµ¥.
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Stefano
15-01-02 17:04
Control System Logic»ó ¹®Á¦(Àǹ®)°¡ ÀÖ´Â »çÇ×À» ³ª¿ÇØ º¾´Ï´Ù. ±×¸²ÀÌ Æ²¸®°Ô ±×·ÁÁ® ÀÖÀ» ¼öµµ ÀÖÀ¸¹Ç·Î ¼¼ºÎÀûÀ¸·Î ¸é¹ÐÈ÷ °ËÅäÇØ º¸µµ·Ï Çϼ¼¿ä.
(1) Column TIC ('Master')¿¡ ¿¬°áµÇ¾î ÀÖ´Â ('Slave') Controller°¡ Reflux Drum Product Flow Controller (FIC-2)¿¡ ¿¬°áµÇ¾î ÀÖ´Â °ÍÀº ¿À·ùÀÔ´Ï´Ù. Product Line À¯·®À¸·Î Column TopÀÇ ¿Âµµ¸¦ Á¶ÀýÇÒ ¼ö ¾ø½À´Ï´Ù.
Column ¿ÂµµÁ¶Àý°è(TIC-1) Ãâ·ÂÀº Reflux Á¶Àý±â (FIC-1)ÀÇ ¼³Á¤Ä¡(SP)¸¦ Á¦°ø Çϵµ·Ï ¿¬°áµÇ¾î¾ß ÇÕ´Ï´Ù.
(2) Reflux Drum Level Controller(LIC-1, 'Master')¿¡ ¿¬°áµÇ¾î¾ß ÇÒ ('Slave') Controller´Â Product Flow Controller (FIC-2)°¡ µÇ¾î¾ß ÇÕ´Ï´Ù. Reflux DrumÀÌ ³ÑÄ£´Ù°í Çؼ ColumnÀ¸·Î µÇµ¹·Á º¸³»¸é Reboiler¿¡ ÀÇÇØ ´Ù½Ã Áõ¹ßµÇ¾î Condenser·Î µé¾î¿À°Ô µÇ¹Ç·Î Overhead ProductÀÇ ´©Àû ¹®Á¦¸¦ ÇØ°áÇÒ ¼ö ¾ø½À´Ï´Ù.
(3) Reflux À¯·®(F1)°ú Product À¯·®(F2)À» ÇÕÇÑ À¯·®Àº PumpÀÇ ÃÑ ¹èÃâ·®Àε¥ ÀÌ °ªÀ» °è»êÇÏ¿© ÇöÀç°ªPV)·Î °¨ÁöÇÏ°í Reflux DrumÀÇ ¾×¸éÁ¶Àý±â(LIC-1)ÀÇ Ãâ·ÂÀ» ¼³Á¤Ä¡(SP)·Î ÇÏ¿© µ¿ÀÛÇÏ´Â ÀüüÀ¯·®(F1+F2)Á¶Àý±â(FIC-3)¸¦ Á¶ÀýÇϵµ·Ï ½Ã½ºÅÛÀÌ ±×·ÁÁ® Àִµ¥ ÀÌ´Â À߸øÀÔ´Ï´Ù.
ÀüüÀ¯·®(F1+F2)Á¶Àý±â´Â Reflux DrumÀÇ ¾×¸éÀÇ ¸í·É(¼³Á¤Ä¡)¸¦ ¹Þ¾ÆµéÀÏ ¼ö°¡ ¾ø½À´Ï´Ù. ¸í·ÉÀ» ³»¸°´Ù°í Çصµ ¾×¸éº¯È È¿°ú¿Í´Â ¹«°üÇÕ´Ï´Ù. À§ (2)¿¡¼ ¼³¸íÇÑ °Íó·³ LIC-1ÀÇ Ãâ·ÂÀº FIC-2ÀÇ ¼³Á¤Ä¡(SP)°¡ µÇ¾î¾ß ÇÕ´Ï´Ù.
(4) ÀüüÀ¯·®(F1+F2)À» °è»êÇÏ¿© PumpÀÇ Minimum Flow¿Í ºñ±³Çغ¸´Â °ÍÀº Àǹ̰¡ ÀÖ°ÚÀ¸³ª ÀÌ °ªÀ» ±âÁØÀ¸·Î Reflux À¯·®(F1)À» Á¶ÀýÇÒ ¼ö ÀÖµµ·Ï ÇÑ Á¶Àý±â(FIC-1)Àº À߸øÀÔ´Ï´Ù. ¼³Á¤Ä¡°¡ ¿À¶ó°¥¼ö·Ï ¹ëºê°¡ ¿·Á¾ß ÇÏ´Â ºÒ¾ÈÁ¤»óÅÂÀÇ Á¶Àý°è¸¦ ±¸¼ºÇÏ°Ô µË´Ï´Ù.
ÀüüÀ¯·®(F1+F2)Àº ½Ã½ºÅÛ ±â´É»ó PumpÀÇ Minimum Flow À̻󰪸¸À» À¯ÁöÇÏ¸é µÉ °ÍÀ̹ǷΠÀüüÀ¯·®Á¶Àý±â(FIC-3)ÀÇ Ãâ·ÂÁß¿¡¼ (F1+F2)°ªÀÌ FmÀ» ÃÊ°úÇÏ´Â °æ¿ì("Range A")¿¡´Â Minimum Flow Control Valve(FV-3)ÀÇ Opening 0, Fm¿¡ ¹Ì´ÞÇÏ´Â °æ¿ì("Range B") FV-1ÀÌ ´õ ¿·Á ÃÖ¼ÒÇÑÀÇ À¯·®À» À¯ÁöÇÒ ¼ö ÀÖµµ·Ï ¿·Á¾ßÇÒ °ÍÀÔ´Ï´Ù. ÀÌ ¶§ FV-1ÀÌ TIC-1ÀÇ Set Point¿Í ¿¬°áµµ¾î ÀÖ´Â °æ¿ì¶ó¸é FIC-3ÀÇ Ãâ·ÂÀ¸·Î ´ëü(Override) ½ÃÄÑ¾ß ÇÕ´Ï´Ù.
(5) Minimum Flow Controller¸¦ À§ÇØ º°µµÀÇ À¯·®°è/Àü¼Û±â¸¦ µÎ°í Àִµ¥ ÀÌ´Â ºñ°æÁ¦ÀûÀÏ °ÍÀ̹ǷΠPump ¹èÃâÀ¯·®Àº Reflux À¯·®(FT-1)°ú Product À¯·®(FT-2)À» PLC ȤÀº DCS»ó¿¡¼ ÇÕ»êÇÏ¿© °è»êÇϵµ·Ï ÇÏ°í À̸¦ °¨ÁöÇÏ°í ÆßÇÁÀÇ Minimum Flow¸¦ ÃÖÀúÀ¯Áö À¯·®À¸·Î ¼³Á¤ÇÏ¿© Á¶ÀýÇÏ·Ï ÇÏ´Â °ÍÀÌ Àû´çÇÒ °ÍÀÔ´Ï´Ù.
±×·¯³ª ¾Õ¼± ´ä±Û¿¡¼ ¼³¸íÇÑ °Íó·³ Electric Control SystemÀ̳ª Control ValveÀÇ ÀÛµ¿½ÇÆп¡ ´ëºñÇÏ¿© ±â°è½Ä Minimum Flow Bypass Check Valve¸¦ ´Þ¾ÆµÎ´Â °ÍÀÌ ÈξÀ ¾ÈÀüÇÏ´Ù°í ÆǴܵ˴ϴÙ. (½Ã½ºÅÛ ¾ÈÀü¿¡ °üÇÑ»çÇ×À̹ǷΠÇùÀÇ °áÁ¤ÇÊ¿ä)
Control System Logic»ó ¹®Á¦(Àǹ®)°¡ ÀÖ´Â »çÇ×À» ³ª¿ÇØ º¾´Ï´Ù. ±×¸²ÀÌ Æ²¸®°Ô ±×·ÁÁ® ÀÖÀ» ¼öµµ ÀÖÀ¸¹Ç·Î ¼¼ºÎÀûÀ¸·Î ¸é¹ÐÈ÷ °ËÅäÇØ º¸µµ·Ï Çϼ¼¿ä. (1) Column TIC ('Master')¿¡ ¿¬°áµÇ¾î ÀÖ´Â ('Slave') Controller°¡ Reflux Drum Product Flow Controller (FIC-2)¿¡ ¿¬°áµÇ¾î ÀÖ´Â °ÍÀº ¿À·ùÀÔ´Ï´Ù. Product Line À¯·®À¸·Î Column TopÀÇ ¿Âµµ¸¦ Á¶ÀýÇÒ ¼ö ¾ø½À´Ï´Ù. Column ¿ÂµµÁ¶Àý°è(TIC-1) Ãâ·ÂÀº Reflux Á¶Àý±â (FIC-1)ÀÇ ¼³Á¤Ä¡(SP)¸¦ Á¦°ø Çϵµ·Ï ¿¬°áµÇ¾î¾ß ÇÕ´Ï´Ù. (2) Reflux Drum Level Controller(LIC-1, 'Master')¿¡ ¿¬°áµÇ¾î¾ß ÇÒ ('Slave') Controller´Â Product Flow Controller (FIC-2)°¡ µÇ¾î¾ß ÇÕ´Ï´Ù. Reflux DrumÀÌ ³ÑÄ£´Ù°í Çؼ ColumnÀ¸·Î µÇµ¹·Á º¸³»¸é Reboiler¿¡ ÀÇÇØ ´Ù½Ã Áõ¹ßµÇ¾î Condenser·Î µé¾î¿À°Ô µÇ¹Ç·Î Overhead ProductÀÇ ´©Àû ¹®Á¦¸¦ ÇØ°áÇÒ ¼ö ¾ø½À´Ï´Ù. (3) Reflux À¯·®(F1)°ú Product À¯·®(F2)À» ÇÕÇÑ À¯·®Àº PumpÀÇ ÃÑ ¹èÃâ·®Àε¥ ÀÌ °ªÀ» °è»êÇÏ¿© ÇöÀç°ªPV)·Î °¨ÁöÇÏ°í Reflux DrumÀÇ ¾×¸éÁ¶Àý±â(LIC-1)ÀÇ Ãâ·ÂÀ» ¼³Á¤Ä¡(SP)·Î ÇÏ¿© µ¿ÀÛÇÏ´Â ÀüüÀ¯·®(F1+F2)Á¶Àý±â(FIC-3)¸¦ Á¶ÀýÇϵµ·Ï ½Ã½ºÅÛÀÌ ±×·ÁÁ® Àִµ¥ ÀÌ´Â À߸øÀÔ´Ï´Ù. ÀüüÀ¯·®(F1+F2)Á¶Àý±â´Â Reflux DrumÀÇ ¾×¸éÀÇ ¸í·É(¼³Á¤Ä¡)¸¦ ¹Þ¾ÆµéÀÏ ¼ö°¡ ¾ø½À´Ï´Ù. ¸í·ÉÀ» ³»¸°´Ù°í Çصµ ¾×¸éº¯È È¿°ú¿Í´Â ¹«°üÇÕ´Ï´Ù. À§ (2)¿¡¼ ¼³¸íÇÑ °Íó·³ LIC-1ÀÇ Ãâ·ÂÀº FIC-2ÀÇ ¼³Á¤Ä¡(SP)°¡ µÇ¾î¾ß ÇÕ´Ï´Ù. (4) ÀüüÀ¯·®(F1+F2)À» °è»êÇÏ¿© PumpÀÇ Minimum Flow¿Í ºñ±³Çغ¸´Â °ÍÀº Àǹ̰¡ ÀÖ°ÚÀ¸³ª ÀÌ °ªÀ» ±âÁØÀ¸·Î Reflux À¯·®(F1)À» Á¶ÀýÇÒ ¼ö ÀÖµµ·Ï ÇÑ Á¶Àý±â(FIC-1)Àº À߸øÀÔ´Ï´Ù. ¼³Á¤Ä¡°¡ ¿À¶ó°¥¼ö·Ï ¹ëºê°¡ ¿·Á¾ß ÇÏ´Â ºÒ¾ÈÁ¤»óÅÂÀÇ Á¶Àý°è¸¦ ±¸¼ºÇÏ°Ô µË´Ï´Ù. ÀüüÀ¯·®(F1+F2)Àº ½Ã½ºÅÛ ±â´É»ó PumpÀÇ Minimum Flow À̻󰪸¸À» À¯ÁöÇÏ¸é µÉ °ÍÀ̹ǷΠÀüüÀ¯·®Á¶Àý±â(FIC-3)ÀÇ Ãâ·ÂÁß¿¡¼ (F1+F2)°ªÀÌ FmÀ» ÃÊ°úÇÏ´Â °æ¿ì("Range A")¿¡´Â Minimum Flow Control Valve(FV-3)ÀÇ Opening 0, Fm¿¡ ¹Ì´ÞÇÏ´Â °æ¿ì("Range B") FV-1ÀÌ ´õ ¿·Á ÃÖ¼ÒÇÑÀÇ À¯·®À» À¯ÁöÇÒ ¼ö ÀÖµµ·Ï ¿·Á¾ßÇÒ °ÍÀÔ´Ï´Ù. ÀÌ ¶§ FV-1ÀÌ TIC-1ÀÇ Set Point¿Í ¿¬°áµµ¾î ÀÖ´Â °æ¿ì¶ó¸é FIC-3ÀÇ Ãâ·ÂÀ¸·Î ´ëü(Override) ½ÃÄÑ¾ß ÇÕ´Ï´Ù. (5) Minimum Flow Controller¸¦ À§ÇØ º°µµÀÇ À¯·®°è/Àü¼Û±â¸¦ µÎ°í Àִµ¥ ÀÌ´Â ºñ°æÁ¦ÀûÀÏ °ÍÀ̹ǷΠPump ¹èÃâÀ¯·®Àº Reflux À¯·®(FT-1)°ú Product À¯·®(FT-2)À» PLC ȤÀº DCS»ó¿¡¼ ÇÕ»êÇÏ¿© °è»êÇϵµ·Ï ÇÏ°í À̸¦ °¨ÁöÇÏ°í ÆßÇÁÀÇ Minimum Flow¸¦ ÃÖÀúÀ¯Áö À¯·®À¸·Î ¼³Á¤ÇÏ¿© Á¶ÀýÇÏ·Ï ÇÏ´Â °ÍÀÌ Àû´çÇÒ °ÍÀÔ´Ï´Ù. ±×·¯³ª ¾Õ¼± ´ä±Û¿¡¼ ¼³¸íÇÑ °Íó·³ Electric Control SystemÀ̳ª Control ValveÀÇ ÀÛµ¿½ÇÆп¡ ´ëºñÇÏ¿© ±â°è½Ä Minimum Flow Bypass Check Valve¸¦ ´Þ¾ÆµÎ´Â °ÍÀÌ ÈξÀ ¾ÈÀüÇÏ´Ù°í ÆǴܵ˴ϴÙ. (½Ã½ºÅÛ ¾ÈÀü¿¡ °üÇÑ»çÇ×À̹ǷΠÇùÀÇ °áÁ¤ÇÊ¿ä)
Great´ëÁø
hansome016
15-01-05 19:01
Stefano ´Ô °¨»çµå¸³´Ï´Ù.
ÀÏ´Ü ±×¸²Àº Uxx PID¸¦ ¹ÙÅÁÀ¸·Î ±×¸° °ÍÀÔ´Ï´Ù.
Á¶±Ý ´õ ¸é¹ÐÇÑ °ËÅä°¡ ÇÊ¿ä ÇÒ °Í °°³×¿ä.¤Ð.¤Ð
Stefano ´Ô °¨»çµå¸³´Ï´Ù. ÀÏ´Ü ±×¸²Àº Uxx PID¸¦ ¹ÙÅÁÀ¸·Î ±×¸° °ÍÀÔ´Ï´Ù. Á¶±Ý ´õ ¸é¹ÐÇÑ °ËÅä°¡ ÇÊ¿ä ÇÒ °Í °°³×¿ä.¤Ð.¤Ð
Áö¸®ºÎµµ
qkd84
15-01-06 14:28
Great´ëÁø´Ô²²¼ ¿Ã·ÁÁֽŠ÷ºÎ´Â Column TICÀÇ signalÀ» ¹Þ¾Æ¼ LPG Product flowrate¸¦ Á¶ÀýÇÏ´Â °ÍÀ¸·Î Material Balance Control¿¡ ÀÇÇÑ LPG ProductÀÇ Composition Control ÀÔ´Ï´Ù. Distillation flowrate°¡ Reflux flowrateº¸´Ù »ó´ëÀûÀ¸·Î ÀÛ°Å´Ù Distillation ProductÀÇ CompositionÀÌ Áß¿äÇÑ °øÁ¤ º¯¼ö À϶§ »ç¿ëÇÕ´Ï´Ù. ÇÏÁö¸¸ ÀÀ´ä¼Óµµ°¡ ´Ê±â ¶§¹®¿¡ ½ÇÁ¦·Î´Â ³Î¸® »ç¿ëµÇÁö ¾Ê½À´Ï´Ù.
ÀÀ´ä¼Óµµ°¡ ´ÊÀº ÀÌÀ¯´Â Material Balance ControlÀÇ procedure¸¦ ÀÌÇØÇÏ¸é ¼³¸íµË´Ï´Ù.
Column compositionÀÌ º¯°æÇÏ°Ô µÇ¸é Column TIC°¡ À̸¦ °¨ÁöÇÏ¿© LPG Product flowrate¸¦ Á¶ÀýÇÕ´Ï´Ù. º¯ÈµÈ LPG Product flowrate´Â Reflux Drum Level¿¡ º¯È¸¦ ÁÖ°Ô µÇ°í ¼³Á¤µÈ LevelÀ» ¸ÂÃß±â À§ÇØ Reflux Drum LIC°¡ Reflux flowrate¸¦ Á¶ÀýÇÏ¿© Reflux ¾çÀ» º¯È ½ÃÄѼ CompositionÀ» ¿øÇÏ´Â °ª¿¡ ¸ÂÃß°Ô µË´Ï´Ù.
¿¹¸¦ µé¾î LPG Product°¡ Spec. º¸´Ù Heavier ÇÑ »óŶó¸é Column TIC´Â ³ôÀº ¿Âµµ¸¦ ³ªÅ¸³¾ °ÍÀÌ°í LPG Product flowrate¸¦ °¨¼Ò½ÃÅ°°Ô µË´Ï´Ù. LPG Product flowrate°¡ °¨¼ÒÇϹǷΠReflux Drum LevelÀº ³ô¾ÆÁö°í LevelÀ» ¸ÂÃß±â À§Çؼ Reflux flowrate´Â Áõ°¡ÇÏ°í Column TIC´Â ¿Âµµ°¡ ³»·Á°¡°í LPG Product on-Spec.À¸·Î º¯ÇÏ°Ô µË´Ï´Ù.
Material Balance ControlÀº Column TIC°¡ Á÷Á¢ Reflux flowrate¸¦ Á¶ÀýÇÏ´Â °ÍÀÌ ¾Æ´Ï°í À§ÀÇ procedure ó·³ ¿©·¯ ´Ü°è¸¦ °ÅÄ¡±â ¶§¹®¿¡ ÀÀ´ä¼Óµµ°¡ ´Ê°Ô µË´Ï´Ù. ÇÏÁö¸¸ Energy Balance¿Í °£¼·ÀÌ Àû°í internal reflux°¡ ÀÏÁ¤ÇÏ´Ù´Â ÀåÁ¡ÀÌ ÀÖ½À´Ï´Ù.
Great´ëÁø´Ô²²¼ ¿Ã·ÁÁֽŠ÷ºÎ´Â Column TICÀÇ signalÀ» ¹Þ¾Æ¼ LPG Product flowrate¸¦ Á¶ÀýÇÏ´Â °ÍÀ¸·Î Material Balance Control¿¡ ÀÇÇÑ LPG ProductÀÇ Composition Control ÀÔ´Ï´Ù. Distillation flowrate°¡ Reflux flowrateº¸´Ù »ó´ëÀûÀ¸·Î ÀÛ°Å´Ù Distillation ProductÀÇ CompositionÀÌ Áß¿äÇÑ °øÁ¤ º¯¼ö À϶§ »ç¿ëÇÕ´Ï´Ù. ÇÏÁö¸¸ ÀÀ´ä¼Óµµ°¡ ´Ê±â ¶§¹®¿¡ ½ÇÁ¦·Î´Â ³Î¸® »ç¿ëµÇÁö ¾Ê½À´Ï´Ù. ÀÀ´ä¼Óµµ°¡ ´ÊÀº ÀÌÀ¯´Â Material Balance ControlÀÇ procedure¸¦ ÀÌÇØÇÏ¸é ¼³¸íµË´Ï´Ù. Column compositionÀÌ º¯°æÇÏ°Ô µÇ¸é Column TIC°¡ À̸¦ °¨ÁöÇÏ¿© LPG Product flowrate¸¦ Á¶ÀýÇÕ´Ï´Ù. º¯ÈµÈ LPG Product flowrate´Â Reflux Drum Level¿¡ º¯È¸¦ ÁÖ°Ô µÇ°í ¼³Á¤µÈ LevelÀ» ¸ÂÃß±â À§ÇØ Reflux Drum LIC°¡ Reflux flowrate¸¦ Á¶ÀýÇÏ¿© Reflux ¾çÀ» º¯È ½ÃÄѼ CompositionÀ» ¿øÇÏ´Â °ª¿¡ ¸ÂÃß°Ô µË´Ï´Ù. ¿¹¸¦ µé¾î LPG Product°¡ Spec. º¸´Ù Heavier ÇÑ »óŶó¸é Column TIC´Â ³ôÀº ¿Âµµ¸¦ ³ªÅ¸³¾ °ÍÀÌ°í LPG Product flowrate¸¦ °¨¼Ò½ÃÅ°°Ô µË´Ï´Ù. LPG Product flowrate°¡ °¨¼ÒÇϹǷΠReflux Drum LevelÀº ³ô¾ÆÁö°í LevelÀ» ¸ÂÃß±â À§Çؼ Reflux flowrate´Â Áõ°¡ÇÏ°í Column TIC´Â ¿Âµµ°¡ ³»·Á°¡°í LPG Product on-Spec.À¸·Î º¯ÇÏ°Ô µË´Ï´Ù. Material Balance ControlÀº Column TIC°¡ Á÷Á¢ Reflux flowrate¸¦ Á¶ÀýÇÏ´Â °ÍÀÌ ¾Æ´Ï°í À§ÀÇ procedure ó·³ ¿©·¯ ´Ü°è¸¦ °ÅÄ¡±â ¶§¹®¿¡ ÀÀ´ä¼Óµµ°¡ ´Ê°Ô µË´Ï´Ù. ÇÏÁö¸¸ Energy Balance¿Í °£¼·ÀÌ Àû°í internal reflux°¡ ÀÏÁ¤ÇÏ´Ù´Â ÀåÁ¡ÀÌ ÀÖ½À´Ï´Ù.
½ºÅ×Æijë
Stefano
15-01-08 20:52
(0) Áö¸®ºÎµµ´ÔÀÇ ´ä±Û¿¡¼ Material Balance Control ¹æ½Ä¿¡ °üÇØ Àß ¼³¸íÇØ Áּ̽À´Ï´Ù. ±×·¯³ª..
(1) ÀÌ Control System¿¡¼ PumpÀÇ Minimum Flow Control System°ú °ü·ÃÁö¾î °í·ÁÇØ º¸¸é Reflux Drum ¾×¸éÀÌ ³ôÀ» °æ¿ì DCS ¿¡ ÀÇÇÑ ÀüüÀ¯·®(F1+F2)Á¶Àý±âÀÇ ¼³Á¤Ä¡¸¦ ´Ã¿© RefluxÀ¯·®(F1)À» ´Ã¿©ÁÖ¸é Column TIC°ªÀÌ ¶³¾îÁö°ÔµÇ°í Product À¯·®(F2)Á¶Àý±âÀÇ ¼³Á¤Ä¡¸¦ ÁÙ¿©ÁÖ°Ô µÇ´Âµ¥...
ÀÌ·Î ÀÎÇÏ¿© Column³»·Î Reflux µÇ¾î ´Ù½Ã ²ú¾î ¿Ã¶ó Reflux Drum¿¡ ¾×ÀÌ ½×ÀÌ°Ô µÇ¹Ç·Î ¾×¸éÁ¶Àý È¿°ú°¡ ³ªÅ¸³ªÁö ¾ÊÀ» °ÍÀ̶ó´Â ÆÇ´ÜÀÔ´Ï´Ù.
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(2) À¯¸íÇÑ Henry Z. KisterÀÇ Àú¼ "Distillation Operation"À» ã¾Æº¸´Ï ÀÌ·± ¹æ½ÄÀº Direct Material Balance Control (Fig 16-4(d), p 498)Àε¥ ¨Í°©ÀÛ½º·± ºñ¿¡ ÀÇÇØ Condenser, Reflux Drum, ColumnÀÌ ºñ¿¡ÀÇÇØ ¿Âµµ°¡ °©ÀÚ°¡ ¶³¾îÁ® Internal Reflux°¡ Áõ°¡µÇ¾úÀ» ¶§ È¿°úÀûÀ̶ó´Â À̾߱Ⱑ ÀÖ°í ¨ÎÀÀ´ä¼Óµµ°¡ ´À·Á¼ Tray ColumnÀÇ °æ¿ìº¸´Ù Column LoadingÀÌ ºñ±³Àû ÀÛÀº Packed Column¿¡¼ È¿°ú¸¦ º»´Ù´Â À̾߱Ⱑ ÀÖ½À´Ï´Ù.
(3) °á·ÐÀû À̾߱âÁö¸¸.. LPG¿Í °°ÀÌ VaporizingÀÌ ½ÉÇϰųª °øȸÀü½Ã Gas°¡ ¹ß»ýÇÏ´Â Amine Pumpµî°ú °°Àº °æ¿ì¿¡´Â Pump Minimum Flow¹®Á¦´Ã ÇØ°áÇϱâ À§Çؼ´Â À¯·®Á¶Àý±â³ª Á¶Àý¹ëºê¸¦ »ç¿ëÇÏ´Â °Íº¸´Ù ±â°è½Ä Minimum Flow Bypass Valve·Î ÇØ°áÇÏ´Â °ÍÀÌ ¾ÈÀüÇÏ´Ù°í »ý°¢µË´Ï´Ù.
(0) Áö¸®ºÎµµ´ÔÀÇ ´ä±Û¿¡¼ Material Balance Control ¹æ½Ä¿¡ °üÇØ Àß ¼³¸íÇØ Áּ̽À´Ï´Ù. ±×·¯³ª.. (1) ÀÌ Control System¿¡¼ PumpÀÇ Minimum Flow Control System°ú °ü·ÃÁö¾î °í·ÁÇØ º¸¸é Reflux Drum ¾×¸éÀÌ ³ôÀ» °æ¿ì DCS ¿¡ ÀÇÇÑ ÀüüÀ¯·®(F1+F2)Á¶Àý±âÀÇ ¼³Á¤Ä¡¸¦ ´Ã¿© RefluxÀ¯·®(F1)À» ´Ã¿©ÁÖ¸é Column TIC°ªÀÌ ¶³¾îÁö°ÔµÇ°í Product À¯·®(F2)Á¶Àý±âÀÇ ¼³Á¤Ä¡¸¦ ÁÙ¿©ÁÖ°Ô µÇ´Âµ¥... ÀÌ·Î ÀÎÇÏ¿© Column³»·Î Reflux µÇ¾î ´Ù½Ã ²ú¾î ¿Ã¶ó Reflux Drum¿¡ ¾×ÀÌ ½×ÀÌ°Ô µÇ¹Ç·Î ¾×¸éÁ¶Àý È¿°ú°¡ ³ªÅ¸³ªÁö ¾ÊÀ» °ÍÀ̶ó´Â ÆÇ´ÜÀÔ´Ï´Ù. ¶ÇÇÑ Reflux(F1)¸¦ ´ÃÀÌ°í Product Rate(F2)¸¦ ÁÙÀÌ°Ô µÈ´Ù°í Çصµ ÀüüÀ¯·®(F1+F2)°ªÀÌ Pump Minimum Flow(Fm) ¹Ì¸¸À¸·Î ¶³¾îÁö¸é ´ëÃ¥ÀÌ ¾øÀ» °Í °°´Ù´Â »ý°¢ÀÔ´Ï´Ù. (2) À¯¸íÇÑ Henry Z. KisterÀÇ Àú¼ "Distillation Operation"À» ã¾Æº¸´Ï ÀÌ·± ¹æ½ÄÀº Direct Material Balance Control (Fig 16-4(d), p 498)Àε¥ ¨Í°©ÀÛ½º·± ºñ¿¡ ÀÇÇØ Condenser, Reflux Drum, ColumnÀÌ ºñ¿¡ÀÇÇØ ¿Âµµ°¡ °©ÀÚ°¡ ¶³¾îÁ® Internal Reflux°¡ Áõ°¡µÇ¾úÀ» ¶§ È¿°úÀûÀ̶ó´Â À̾߱Ⱑ ÀÖ°í ¨ÎÀÀ´ä¼Óµµ°¡ ´À·Á¼ Tray ColumnÀÇ °æ¿ìº¸´Ù Column LoadingÀÌ ºñ±³Àû ÀÛÀº Packed Column¿¡¼ È¿°ú¸¦ º»´Ù´Â À̾߱Ⱑ ÀÖ½À´Ï´Ù. (3) °á·ÐÀû À̾߱âÁö¸¸.. LPG¿Í °°ÀÌ VaporizingÀÌ ½ÉÇϰųª °øȸÀü½Ã Gas°¡ ¹ß»ýÇÏ´Â Amine Pumpµî°ú °°Àº °æ¿ì¿¡´Â Pump Minimum Flow¹®Á¦´Ã ÇØ°áÇϱâ À§Çؼ´Â À¯·®Á¶Àý±â³ª Á¶Àý¹ëºê¸¦ »ç¿ëÇÏ´Â °Íº¸´Ù ±â°è½Ä Minimum Flow Bypass Valve·Î ÇØ°áÇÏ´Â °ÍÀÌ ¾ÈÀüÇÏ´Ù°í »ý°¢µË´Ï´Ù.
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