Posted by(작성하신 분) Angela Santos ( September 21, 2001 at 21:10:40: )
In Reply to(원문) : Re: viscometer and return on investment
posted by(원문 작성자) : Solartron Mobrey on January 30, 2001 at 09:18:08:
: Hi
: The polymerisation application information given by CBC is a good example. Atoglas in Holland use process viscometers supplied by Solartron for end point spotting in methyl methacrylate polymerisation control. Using lab instruments to plot the reaction and predict the end point is risky and can mean 10% failure. Reaction time is approx 2.5hours and the reaction becomes exothermic in the final stages.There is a 20second target which they now hit everytime using process viscometers.
: An article was published and may be obtained from Rob Tucker of Wordsun (http://www.wordsun.com)
: This is what we (Solarrton) term an analytical application where kinematic viscosity is related to the mean polymer chain length through ASTM 2502 (?)the molecular weight, via the viscosity at 40degC and at 100degC.
: In another application, the control of heavy fuel oil viscosity, (which we term behavioral... we are only interested in the viscosity at the process temperature)the viscosity must be controlled through heating the oil to obtain the optimum droplet size. Too large a droplet and the oil drop takes too long to burn with resultant pollution. Supplying excess oxygen can cost as much as �100,000 per annum for a typical petrochemical plant or poor control can mean excess soot blowing and more frequent down time for replacing boiler tubes. Typical cost can be �50,000 per annum. Downtime and lost production may cost more. An article will shortly be published on a typical applictaion at a UK petrochemicals plant. A group of power stations in the US are similarly dependant on viscometers to control the heating of bunker C to the burners. Here the lack of suitable control and for the pollution due to using temperature control when their viscometers are down has cost them millions of dollars in fines (an for other problems). They are now changing out their original 60 year old technology for the latest technology from Solartron. (www.solartron.com) For large diesel engines HFO heating is a common application with many suppliers such as Cambridge instruments (www.cambridge-applied.com), VAF (www.Vaf-fluidtechnik.de)to suggest two.
: Unfortunately, the most impressive cost savings cannot be published because of the commercial sensitivities however a typical application where the financial benefits can be very very significant is in the Canadian pipelines where heavy crude must be blended with distillate to get the density and viscosity inside allowable limits. The distillate is a refined product delivered to the oil fields by road tanker. Every tanker load saved by good process viscosity measurement is extremely valuable. This is an area of intense activity among the various pipeline operators and the companies shipping crude into the pipe lines.
: www.nametre.com is a very useful site of the Nametre company and www.viscosity.com is the site of Norcross, both of which give good application examples.
: Should you require more assistance please contact me.