| 摘要 |
<p>A method of recovering ammonium sulphate from a gas stream produced in a urea plant (1), and in particular by a solidification unit (10) of the urea plant, the method including the steps of : treating a gas stream from a solidification unit (10) in a scrubber (13) to remove ammonia from the gas steam and form an ammonium sulphate solution; mixing the ammonium sulphate solution from the scrubber (13) with a low-concentration urea solution produced in the urea plant (1), and removing water in an evaporator (15), to form a urea-ammonium sulphate eutectic; and feeding the eutectic, mixed with high-concentration urea melt produced by the urea plant (1), to the solidification unit (10).</p> |
