发明名称 |
METHOD FOR REDUCING AEROSOL EMISSIONS IN A UREA GRANULATION PLANT |
摘要 |
The invention relates to a process for the granulation of a concentrated urea solution whereas the granulation produces a urea granulate and a dust laden air, which is then fed into a dust scrubber which removes the coarser dust with a less concentrated urea solution and which releases a residual air comprising air with ammonia, carbon dioxide water and an aerosol comprising mainly ammonium isocyanate and a part of very fine urea sublimate, whereas the aerosol is then separated off and fed into a isomerisation unit which comprises a stripping where the ammonium isocyanate reacts with steam to form urea which is then redirected into the dust scrubber as a less concentrated urea solution, and the residual air is directed into an acidic scrubber which releases clean air into the atmosphere which finally leads to a recycling of the aerosol of ammonium isocyanate into urea. The invention also relates to a device for carrying out the related process. |
申请公布号 |
WO2009138178(A1) |
申请公布日期 |
2009.11.19 |
申请号 |
WO2009EP03171 |
申请日期 |
2009.05.04 |
申请人 |
UHDE FERTILIZER TECHNOLOGY B.V.;NIEHUES, PAUL;FRANZRAHE, HARALD;POTTHOFF, MATHIAS;MONSTREY, ROLAND |
发明人 |
NIEHUES, PAUL;FRANZRAHE, HARALD;POTTHOFF, MATHIAS;MONSTREY, ROLAND |
分类号 |
B01D53/58;B01D53/78;C05G3/00 |
主分类号 |
B01D53/58 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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