发明名称 |
AMMONIA RECOVERY DEVICE AND RECOVERY METHOD |
摘要 |
<p>A method includes a first step of, with a C02.cndot.H2S stripper maintained to have a pressure higher than atmospheric pressure, from the ammonia-containing wastewater, discharging CO2 and H2S in a form of gas having a low moisture concentration from a tower top of the CO2.cndot.H2S stripper while discharging an ammonia-containing solution from a tower bottom of the CO2.cndot.H2S stripper; a second step of introducing the ammonia-containing solution obtained after the first step into an ammonia stripper which is maintained to have a lower pressure than that of the CO2.cndot.H2S stripper, and thereby discharging a gas rich in ammonia containing a small amount of H2S and CO2 from a tower top of the ammonia stripper while discharging water usable as industrial water from a tower bottom of the ammonia stripper; and a third step of introducing the ammonia rich gas obtained after the second step into a washing tower which is maintained to have a lower pressure than that of the ammonia stripper, and thereby discharging a wastewater containing a Na compound from a tower bottom of the washing tower while discharging a H2S-free gas rich in ammonia from a tower top of the washing tower.</p> |
申请公布号 |
CA2717582(A1) |
申请公布日期 |
2011.04.22 |
申请号 |
CA20102717582 |
申请日期 |
2010.10.13 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
SATO, FUMIAKI;FURUICHI, HIROYUKI;KATO, YUDAI;ISHIDA, KAZUO |
分类号 |
C01C1/10;B01D19/00;C01C1/00;C02F1/00 |
主分类号 |
C01C1/10 |
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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