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Ammonia recovery device and recovery method
US9102547B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9102547-B2 |
| Application number | US-201314070048-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 1, 2013 |
| Priority date | Oct 22, 2009 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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A method includes a first step of, with a CO 2 .H 2 S stripper maintained to have a pressure higher than atmospheric pressure, from the ammonia-containing wastewater, discharging CO 2 and H 2 S in a form of gas having a low moisture concentration from a tower top of the CO 2 .H 2 S stripper while discharging an ammonia-containing solution from a tower bottom of the CO 2 .H 2 S 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 CO 2 .H 2 S stripper, and thereby discharging a gas rich in ammonia containing a small amount of H 2 S and CO 2 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 H 2 S-free gas rich in ammonia from a tower top of the washing tower.
First claim
Opening claim text (preview).
What is claimed is: 1. An ammonia recovery device for recovering ammonia from an ammonia-containing wastewater from a gasification furnace, the ammonia recovery device comprising: a CO 2 .H 2 S stripper configured for maintaining an inner pressure higher than atmospheric pressure; an ammonia stripper configured for maintaining an inner pressure lower than that of the CO 2 .H 2 S stripper; and a washing tower configured for maintaining an inner pressure maintained lower than th…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9102547B2 cover?
- A method includes a first step of, with a CO 2 .H 2 S stripper maintained to have a pressure higher than atmospheric pressure, from the ammonia-containing wastewater, discharging CO 2 and H 2 S in a form of gas having a low moisture concentration from a tower top of the CO 2 .H 2 S stripper while discharging an ammonia-containing solution from a tower bottom of the CO 2 .H 2 S stripper; a seco…
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C02F1/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).