we are facing with environmental affects of dust emission on our 1500 MTPD urea plant prilling tower. We are searching for involved and expert companies for performing a project in our plant to reduce the dust emission. Would you please search and inform me if there are any companies which could help us? Thank you for your prompt reply. masoud

Dear Mr. C.V.Srinivasan Nishi thanks a lot for your advice.It is to be informed that our urea plant constructed under stamicarbon license.In this plant the urea liquid send to top of the prilling tower and after spraying inside it the exhaust air stream send directly to environment by ID fans which are located inside the stacks.Recently governmental regulation for the emission of prilling tower become more and more restricted.Not meeting these requirement might lead to force plant closure.So it is necessary to perform a project to reduce dust emission.Allowable emission levels are maximum 50-100 mg/m3 dust , however current emission is around 225mg/m3. we would like to find companies which are involved in this kind of projects ( Europe or India companies)and could help us. Masoud > >Dust emission from prill tower could be due to ID fan not >working well or FD blower fan at the top floor (near >evaporators at the top) not functioning well. >Also it could be due to evaporator and demister above >evaporator with steam lancing may not function well. With >improved mechanical and process control demister function >could be improved. > >For this. first to study the problem at hand: Your process >designer and mechanical equipment supplier should study. If >this is a process design problem process improvement will >be needed to control the emission due to ID fan and FD >blower fan. If it is a mechanical problem, look into ID fan >blade cracks or FD blower fan excessive vibration problems >and also evaporator demister problem. > >Evaporators if inadequately designed with demister function >not working well may also have to be looked into. Based on >process design study and any defect in mechanical equipment >mal-function - ID fans, FD blower fans you can control the >dust emission well. > >Suggest your process and mechanical supplier companies >first. > >Hope this helps >C.V.Srinivasan Nishi Engineers pvt ltd India Dec 27, 2008 >E-mai: nishi@vsnl.com > > >>we are facing with environmental affects of dust emission on >>our 1500 MTPD urea plant prilling tower. >> >>We are searching for involved and expert companies for >>performing a project in our plant to reduce the dust >>emission. >> >>Would you please search and inform me if there are any >>companies which could help us? >> >>Thank you for your prompt reply. >>masoud