Polysulfide intercalated layered double hydroxides for metal capture applications
US-2015336050-A1 · Nov 26, 2015 · US
Exhaust gas treatment method and treatment facility
US12115489B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12115489-B2 |
| Application number | US-202017642548-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 13, 2020 |
| Priority date | Sep 11, 2019 |
| Publication date | Oct 15, 2024 |
| Grant date | Oct 15, 2024 |
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- Title
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- Abstract
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Abstract
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An exhaust gas treatment method by which mercury contained in exhaust gas can be separated and removed efficiently and inexpensively. The method includes cooling an exhaust gas containing mercury in metal vapor phase by spraying water or other methods to condense mercury in the exhaust gas from metal vapor phase into metal liquid and thus to separate and remove mercury from the exhaust gas. When the exhaust gas is cooled by spraying water, the sprayed water is collected and separated into separated water and a solid containing mercury that has condensed to metal liquid, and mercury is recovered from the solid. The metal mercury particles that have condensed to metal liquid are dispersed in cooling water. The metal mercury particles can thus be easily separated and recovered by using a suitable separation device.
First claim
Opening claim text (preview).
The invention claimed is: 1. An exhaust gas treatment method comprising; cooling an exhaust gas containing mercury in metal vapor phase at an average cooling ratio in a range of 4.5 to 18.0° C./sec by spraying water into the exhaust gas, thereby condensing the mercury in the exhaust gas from the metal vapor phase into metal liquid in order to separate and remove the mercury from the exhaust gas; collecting water sprayed into the exhaust gas; separating the collected water into separated water and a solid containing the mercury that has condensed to the metal liquid; and recovering the mercury from the solid. 2. An exhaust gas treatment facility comprising: a water spray cooling device configured to spray water into an exhaust gas containing mercury in metal vapor phase to cool the exhaust gas at an average cooling ratio in a range of 4.5 to 18.0° C./sec, thereby condensing the mercury in the exhaust gas from the metal vapor phase into metal liquid in order to separate and remove the mercury from the exhaust gas; and a solid-liquid separation device configured to collect water sprayed into the exhaust gas; separate the collected water into separated water and a solid containing the mercury that has condensed to the metal liquid; and recover the mercury from the solid. 3. The exhaust gas treatment method according to claim 1 , wherein the average cooling ratio is in a range of 7.5 to 18.0° C./sec. 4. The exhaust gas treatment facility according to claim 2 , wherein the average cooling ratio is in a range of 7.5 to 18.0° C./sec.
Assignees
Inventors
Classifications
by direct contact between vapours or gases and the cooling medium · CPC title
- B01D53/64Primary
Heavy metals or compounds thereof, e.g. mercury · CPC title
Water · CPC title
Polluted air · CPC title
from waste incineration plants · CPC title
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- What does patent US12115489B2 cover?
- An exhaust gas treatment method by which mercury contained in exhaust gas can be separated and removed efficiently and inexpensively. The method includes cooling an exhaust gas containing mercury in metal vapor phase by spraying water or other methods to condense mercury in the exhaust gas from metal vapor phase into metal liquid and thus to separate and remove mercury from the exhaust gas. Whe…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B01D53/64. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 15 2024 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).