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Wysłany: Czw 20:48, 30 Gru 2010
Temat postu: Laguna Beach Jeans Systematic optimization method
Systematic optimization method in atmospheric and vacuum distillation unit and heat exchanger network Renovation
Although a wide variety of these alternative reagents, but with common properties: the reaction of metal ions and hydrogen sulfide reaction, of course, vary the conditions of reaction, the reaction of the sensitivity is higher than hydrogen sulfide. Remains in use hydrogen sulfide is extremely rare instances, the chemical reagents in the international standard (method for the determination of heavy metals> ISO6353/1-1982 can be considered an example. Since the lack of clearly defined pH regulation in the country's national standards for some non- to understand the strange phenomenon. For example,
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, GB629 (NaOH>, GB639 (anhydrous sodium carbonate>, GB1397 (potassium> and other chemical reagents in the specific implementation of the standard method,
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, I use the generic acid nitric oxide (and possibly break out with their nitrite) to acidified test solution, which is guilty of a \for non-oxidizing acid medium or adjust pH. Therefore,
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, this strange phenomenon is the \reagent standard. \heavy metal, \The international standard is actually no longer exists. The good news is: American Chemical Society ACS developed the standard chemical reagents has been abolished \adopted. The company produces high quality sodium hydroxide to individual heavy metal impurities Pb, only the sub-index measuring technology, general \the total abolition of the unreasonable standards of technical indicators have been just around the corner, and this late, \shortcomings. in the synthesis, and some still use hydrogen sulfide as raw material, indicating that work is still not thorough enough, as the request from the green chemistry to further the process. In the application, in the past, successful application areas of the environment due to pollution, do not meet the \areas should be j1j is imperative. Therefore, to make such as hydrogen sulfide and the like alternative of toxic reagents described as \To meet the environmental requirements to achieve the development of new reagents for pollution-free high goals. Received: June 2002 (Continued from page 16) 24.52 million tons coke, the annual fuel savings of about 1728 post-partum qualified products, the production operation data listed in Table 1. After the transformation,
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, tons of very significant economic benefits. crude oil heat exchanger design value greater than the final temperature of up to 300 �� or more, than the change (2) analysis of the system energy integration , different materials for making the system was increased by 33 ��. atmospheric temperature of furnace chamber temperature of 780 �� corresponding bit from the heat again to take reasonable arrangements to reduce the amount of steam and often reduced to 685 ��, furnace operating conditions improved. pressure top of the tower to take the heat. modified the device by the 520.47 million comprehensive energy consumption fell to 495.95 million tons of coke a coke tons. 5 Conclusion (1) In this paper, process simulation software for process simulation-wide crude oil distillation unit and comprehensive analysis to determine the bottlenecks in the operation of the original device in the final temperature is too low for the oil heat exchanger, heat exchanger network pressure drop is too large. for the transformation of the above issues, the original plant capacity increased from 250 million tons to 300 million years tons of ~. unit comprehensive energy consumption reduced by 24 * (3) of the existing heat exchanger network device to analyze the transformation of heat exchanger networks proposed two options, taking into account site conditions, equipment,
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, construction period, investment in equipment, etc. various factors, the choice of a smaller amount of heat transformation of rehabilitation programs.
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