Strona glówna
•
FAQ
•
Szukaj
•
Użytkownicy
•
Grupy
•
Galerie
•
Rejestracja
•
Profil
•
Zaloguj się, by sprawdzić wiadomości
•
Zaloguj
Forum Forum MESA !! Strona Główna
->
Sędziowie
Napisz odpowiedź
Użytkownik
Temat
Treść wiadomości
Emotikony
Więcej Ikon
Kolor:
Domyślny
Ciemnoczerwony
Czerwony
Pomarańćzowy
Brązowy
Żółty
Zielony
Oliwkowy
Błękitny
Niebieski
Ciemnoniebieski
Purpurowy
Fioletowy
Biały
Czarny
Rozmiar:
Minimalny
Mały
Normalny
Duży
Ogromny
Zamknij Tagi
Opcje
HTML:
TAK
BBCode
:
TAK
Uśmieszki:
TAK
Wyłącz HTML w tym poście
Wyłącz BBCode w tym poście
Wyłącz Uśmieszki w tym poście
Kod potwierdzający: *
Wszystkie czasy w strefie EET (Europa)
Skocz do:
Wybierz forum
Nabór do ZESPÓŁ Forum MESA
----------------
Nabór
MESA - DRUŻYNY
----------------
GKS Bełchatów
Cracovia Kraków
Dyskobolia Grodzisk Wielkopolski
Górnik Zabrze
Jagiellonia Białystok
Korona Kielce
Lech Poznań
Legia Warszawa
ŁKS Łódź
Odra Wodzisław Śląski
Polonia Bytom
Ruch Chorzów
Wisła Kraków
Zagłębie Lubin
Zagłębie Sosnowiec
MESA - OGÓLNIE
----------------
Regulamin
Terminarz
Sędziowie
Wyniki
DLA KIBICA
----------------
Typer
Rozrywka
Sonda
INNE
----------------
Hydepark
Reklama
PARTNERZY
----------------
Parnerzy w reklamie i realizacji projektu !!
Przegląd tematu
Autor
Wiadomość
43nike9485qt
Wysłany: Pon 10:17, 03 Sty 2011
Temat postu: puma shoes The production of polyether polyol to d
The production of polyether polyol to determine the best aging time
Time is only the conversion rate of relationship, nothing to do with the initial concentration, but the actual production of the total conversion rate for the pursuit of the improvement requirements of the transformation is not cured after a minimum amount of propylene oxide. Taking into account the equipment operating costs, making the lowest cost of production, actual production is the ultimate goal. Extended aging time, increase product yield, but water, electricity, gas and other operating costs increase, therefore, investigated the relationship between them will be able to find an optimal curing time allowing for the lowest cost. Table 1,
puma shoes
, a brand for the company polyether calculated and measured values of the comparison. Wrapped in a theoretical total value-ff Huang Shu-value real compare products at the end of feeding time when the L values calculated aging 4h measured relative error,% of measured values of relative error,% intermediate 3.3963.3351.8290.2820 .2791.075 finished 1.9051.8811.2760.1570.1551.290 data can be seen from Table 1, the calculated and measured values is not, more in line with the actual situation. Error is mainly due to polymerization reactor vapor space due to propylene oxide. 3 When asked to determine the best curing usually the production of polyether, the reaction time is much less than the refined processing time. Reactor time normally does not affect the productive capacity of the device. Therefore, to obtain a higher yield can be increased response and ripening time, without affecting device yield. The following are obtained according to the actual situation of the reactor operation time and operating costs of the relationship. Y = 105t. Where: y. During the reactor for the aging operating costs, Yuan (including water, electricity, gas, labor and other costs); ? for the reactor operating time, h. The reaction of propylene oxide is not the cost of the loss (in polyether price of 8,000 yuan, t) dollars, dollars. Y ~ = 13900 [Mo]. [Mendelevium the end of the ripening of propylene oxide concentration,
abercrombie outlet
, mol / kg reaction mixture. Therefore, the total cost: yy. + Yoo = lO5t +13900 [Mo] that: Y ~ = lO5t +13900 [Mi] e-Kt ~ To make the total cost of the minimum, the following equation to be solution: dYJdt = 105 +13900 [Mo] (-K [cat]) e-~ = Ot =- (K [cat]) In (105 / (13900 [Mo] k [cat])) as the best aging time on the type formula,
ralph lauren outlet
, substituting the data into the case can get the best aging time to 9.014h. Ripening time can be taken 9h, designed for the aging time 4h, can be calculated as the difference between the two costs: a Krcat1t-K ��cat1tY ~ 105 (tl-t2) +13900 x3.396 (e eleven e) tl- -4, t2 = 9 ʱ, y = 3321 Ԫ ripening time is 9h, the cost of 3321 yuan per tank savings. That the cost per ton of product may be reduced by 110 yuan or so. Improve the aging temperature, reduce the curing time and improve the conversion rate can also reduce costs. But raising the temperature also increased the monomer chain transfer rate, making lower-quality product, under normal circumstances should not be easily used. Manufacture the finished product can get the best ripening time, by calculating the reaction at the end of that most of = 1.9, using the formula was the best solution aging time 8.1h, taking approximately 8h, and the original design for 4h. According to equation solve for yz = 1590 yuan, 53 yuan per ton savings. Intermediate manufacturing cost savings combine ton polyether polyols using the best ripening time can save costs 89.7 yuan. Intermediates can be produced per ton of finished 3t. 4 Conclusion The production of polyether polyols obtained Kinetics of fed-type polyether production of dynamic mathematical model,
uggs nederland
, based on the dynamic mathematical model to calculate the value of the response phase, and production compared to measured values. Error is small, then get the best value of the ripening time, ripening time using the best production of polyether aging time than the original design to reduce costs 89.7 yuan / t product, has significant economic benefits.
More articles related to topics:
buy ghd hair PC Like Shadows Tablet PC2005_2809
tory burch outlet The combination of XML and Java
tory burch shoes Fuji Digital Academy - The Basics
fora.pl
- załóż własne forum dyskusyjne za darmo
Theme
FrayCan
created by
spleen
&
Download
Powered by
phpBB
© 2001, 2005 phpBB Group
Regulamin