Method and apparatus for pre-heating recirculated flue gas to a dry scrubber during periods of low temperature
US-9186625-B2 · Nov 17, 2015 · US
Method for preventing inactivation of flue gas desulfurization apparatus
US9718024B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9718024-B2 |
| Application number | US-201214241112-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 22, 2012 |
| Priority date | Aug 30, 2011 |
| Publication date | Aug 1, 2017 |
| Grant date | Aug 1, 2017 |
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Abstract
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To provide a method for predicting a deactivation phenomenon in a flue-gas desulfurization unit to prevent the occurrence of the deactivation phenomenon before it happens. There is provided a method for preventing the occurrence of a deactivation phenomenon in a flue-gas desulfurization unit that treats flue gas of a coal-fired boiler, the method includes calculating a deactivation potential as an index of the deactivation phenomenon based on alkaline components such as Na, Ca, Mg, and K contained in ash in the flue gas, and performing an operation management, such as adjustment of set value of a pH control system, on the flue-gas desulfurization unit depending on change of the deactivation potential.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for preventing occurrence of a deactivation phenomenon in a flue-gas desulfurization unit that treats flue gas of a coal-fired boiler, the method comprising: calculating a deactivation potential as an index of the deactivation phenomenon based on alkaline components contained in ash in the flue gas; and performing an operation management of the flue-gas desulfurization unit depending on change of the deactivation potential. 2. The method for preventing a deactivation phenomenon according to claim 1 , wherein the operation management is to make an adjustment of at least any of a pH control system, a wastewater control system, and a chemical addition control system of the flue-gas desulfurization unit. 3. The method for preventing a deactivation phenomenon according to claim 1 , wherein the deactivation potential takes into consideration a vitrification ratio of the ash and an atomic arrangement structure of glass. 4. The method for preventing a deactivation phenomenon according to claim 1 , wherein the deactivation potential is calculated using, as a parameter, a ratio of the alkaline components to a soluble material contained in the ash. 5. The method for preventing a deactivation phenomenon according to claim 2 , wherein the deactivation potential takes into consideration a vitrification ratio of the ash and an atomic arrangement structure of glass. 6. The method for preventing a deactivation phenomenon according to claim 2 , wherein the deactivation potential is calculated using, as a parameter, a ratio of the alkaline components to a soluble material contained in the ash. 7. The method for preventing a deactivation phenomenon according to claim 3 , wherein the deactivation potential is calculated using, as a parameter, a ratio of the alkaline components to a soluble material contained in the ash. 8. The method for preventing a deactivation phenomenon according to claim 5 , wherein the deactivation potential is calculated using, as a parameter, a ratio of the alkaline components to a soluble material contained in the ash.
Assignees
Inventors
Classifications
of purifiers, e.g. for removing noxious material (traps for solid residues F23J3/04) · CPC title
Sulfur compounds · CPC title
Flue gases · CPC title
of calcium · CPC title
Gaseous mixtures, e.g. polluted air · CPC title
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- What does patent US9718024B2 cover?
- To provide a method for predicting a deactivation phenomenon in a flue-gas desulfurization unit to prevent the occurrence of the deactivation phenomenon before it happens. There is provided a method for preventing the occurrence of a deactivation phenomenon in a flue-gas desulfurization unit that treats flue gas of a coal-fired boiler, the method includes calculating a deactivation potent…
- Who is the assignee on this patent?
- Takei Noboru, NISHIZAKI Chisa, Chiyoda Corp
- What technology area does this patent fall under?
- Primary CPC classification B01D53/346. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 01 2017 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).