CN102784555A - Method for strengthening seawater desulphurization by sodium fulvic acid - Google Patents
Method for strengthening seawater desulphurization by sodium fulvic acid Download PDFInfo
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- CN102784555A CN102784555A CN2012102942573A CN201210294257A CN102784555A CN 102784555 A CN102784555 A CN 102784555A CN 2012102942573 A CN2012102942573 A CN 2012102942573A CN 201210294257 A CN201210294257 A CN 201210294257A CN 102784555 A CN102784555 A CN 102784555A
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- seawater
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Abstract
The invention relates to a method for strengthening seawater desulphurization by sodium fulvic acid, which belongs to the technical field of sulfur dioxide removal. The method comprises the steps of: adding seawater and sodium fulvic acid in a mixing pool and adequately mixing; inflowing the seawater into a circulating pool; removing fly ash in smoke by a deduster; introducing dedusted smoke into a smoke cooler; guiding cooled smoke to the bottom of a filler tower to flow upwards, inflowing the seawater containing sodium fulvic acid from the circulating pool to the filler tower to spray downwards, contacting with the smoke by way of countercurrent, adequately reacting and absorbing SO2, and circularly absorbing through the circulating pool; after absorbing SO2 to saturation, inflowing acidic seawater from the circulating pool to a neutralization pond and mixing with alkali seawater from the smoke cooler adequately; inflowing the neutralized seawater into an aeration basin, blowing appropriate amount of air so that the pH value of seawater rises to 6.5, and discharging the seawater into sea. According to the method, sulfur capacity of seawater is improved, the desulfurization efficiency is enhanced by alkalescence and pH buffer of the sodium fulvic acid, so that energy conservation and emission reduction are realized.
Description
Technical field
The present invention relates to sulfur dioxide removal technical field in the waste gas, specifically is the method that a kind of sodium base fulvic acid is strengthened sea water desulfuration.
Background technology
Sulfur dioxide (SO2) can cause air quality to worsen and acid rain harm; The Environmental Protection in China law regulation; The essential flue gas desulfur device of installing of thermal power plant; In a large amount of desulfurizers that dropped at present, what most sulfur removal technologies adopted is limestone-gypsum method, but exists shortcomings such as producing secondary pollution, investment are big, operating cost height.With the desulfurization method of limestone-gypsum compared with techniques, seawater desulfurizing process has that operating cost is low, small investment, system are simple, do not have advantage such as solid useless generation, thereby becomes seashore power plant and well select.Seashore power plant ubiquity is to the sea water desulfuration technology requirement at present, and still, the Sulfur capacity of seawater is on the low side at present, and research shows that adding certain quantity of additive such as lime can improve the desulfurization performance of seawater in seawater, but have the possibility of fouling.
Literature search through to prior art is found; Chinese patent number: CN101143299B, name are called the invention of " Deuslfurizing system for sea water "; Proposition increases controller, content of sulfur dioxide meter, flue gas flow meter, seawater flow meter, adjusting device, thermometer and acid-base value monitoring meter in Deuslfurizing system for sea water, this method can be regulated exerting oneself of seawater booster pump according to the variation of sulfur content in exhaust gas volumn and the flue gas; Make desulfurization seawater amount and exhaust gas volumn optimum Match, optimize aeration rate.But this system does not fundamentally solve the little problem of seawater Sulfur capacity.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, the method that provides a kind of sodium base fulvic acid to strengthen sea water desulfuration reaches the Sulfur capacity that improves seawater, strengthens and improve the effect of sea water desulfuration.
The present invention is achieved through the following technical solutions, may further comprise the steps:
A, at preparing pool, add seawater and sodium base fulvic acid, fully stirring, wherein the mass percent of sodium base fulvic acid is 1% ~ 30%;
B, the above-mentioned seawater that has added sodium base fulvic acid is flowed in the circulatory pool;
C, flue gas is earlier removed flying dust through deduster;
D, the flue gas after the dedusting is fed in the gas cooler, reduce to 40 ~ 60 ℃, help improving reaction rate with seawater through the flue-gas temperature of subcooler;
E, cooled smoke is imported packed tower bottom upwards flow, the seawater that will contain sodium base fulvic acid flows into packed tower by circulatory pool, and spray contacts with flue gas adverse current downwards; Fully reaction absorbs SO2, through the circulatory pool absorption that repeatedly circulates, because sodium base fulvic acid is a kind of strong base-weak acid salt; Not only have alkalescent, can increase the basicity of seawater, and be a kind of pH buffer; Can slow down the reduction of absorption liquid pH value, thereby strengthen the Sulfur capacity of seawater, improve desulfuration efficiency;
F, wait to absorb SO2 saturated after, in the future the acid seawater in self-loopa pond flows in the neutralization pond, fully mixes with alkaline seawater from gas cooler;
Seawater after g, the neutralization flows in the aeration tank, blasts an amount of air, and the sulfite oxidation that desulfurization in the seawater is generated is to stablize harmless sulfate, makes seawater pH value rise to 6.5 and enters later the sea.
The present invention utilizes the alkalescent and the pH resiliency of sodium base fulvic acid, improves the Sulfur capacity of seawater, has improved desulfuration efficiency, has not only realized energy-saving and emission-reduction, and technology is simple, cost is lower.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
Like Fig. 1, at preparing pool, the adding mass percent is 1% sodium base fulvic acid in seawater, after fully stirring; Flow in the circulatory pool, flue gas is removed flying dust through deduster earlier, in gas cooler, be cooled to 60 ℃ again; Cooled smoke imports the packed tower bottom and upwards flows, and the seawater that will contain sodium base fulvic acid flows into packed tower by circulatory pool, contacts with flue gas adverse current; Fully reaction absorbs SO2, and desulfuration efficiency can reach 95%, through the circulatory pool absorption that repeatedly circulates; Wait to absorb SO2 saturated after, in the future the acid seawater in self-loopa pond flows in the neutralization pond, fully mixes with alkaline seawater from gas cooler; Seawater after the neutralization flows in the aeration tank, blasts an amount of air, makes seawater pH value rise to 6.5 and enters later the sea.
Embodiment 2
Like Fig. 1, at preparing pool, the adding mass percent is 10% sodium base fulvic acid in seawater, after fully stirring; Flow in the circulatory pool, flue gas is removed flying dust through deduster earlier, in gas cooler, be cooled to 50 ℃ again; Cooled smoke imports the packed tower bottom and upwards flows, and the seawater that will contain sodium base fulvic acid flows into packed tower by circulatory pool, contacts with flue gas adverse current; Fully reaction absorbs SO2, and desulfuration efficiency can reach 96%, through the circulatory pool absorption that repeatedly circulates; Wait to absorb SO2 saturated after, in the future the acid seawater in self-loopa pond flows in the neutralization pond, fully mixes with alkaline seawater from gas cooler; Seawater after the neutralization flows in the aeration tank, blasts an amount of air, makes seawater pH value rise to 6.5 and enters later the sea.
Embodiment 3
Like Fig. 1, at preparing pool, the adding mass percent is 15% sodium base fulvic acid in seawater, after fully stirring; Flow in the circulatory pool, flue gas is removed flying dust through deduster earlier, in gas cooler, be cooled to 40 ℃ again; Cooled smoke imports the packed tower bottom and upwards flows, and the seawater that will contain sodium base fulvic acid flows into packed tower by circulatory pool, contacts with flue gas adverse current; Fully reaction absorbs SO2, and desulfuration efficiency can reach 97%, through the circulatory pool absorption that repeatedly circulates; Wait to absorb SO2 saturated after, in the future the acid seawater in self-loopa pond flows in the neutralization pond, fully mixes with alkaline seawater from gas cooler; Seawater after the neutralization flows in the aeration tank, blasts an amount of air, makes seawater pH value rise to 6.5 and enters later the sea.
Claims (1)
1. sodium base fulvic acid is strengthened the method for sea water desulfuration, it is characterized in that, may further comprise the steps:
A, at preparing pool, add seawater and sodium base fulvic acid, fully stirring, wherein the mass percent of sodium base fulvic acid is 1% ~ 30%;
B, the above-mentioned seawater that has added sodium base fulvic acid is flowed in the circulatory pool;
C, flue gas is earlier removed flying dust through deduster;
D, the flue gas after the dedusting is fed in the gas cooler, reduce to 40 ~ 60 ℃, help improving reaction rate with seawater through the flue-gas temperature of subcooler;
E, cooled smoke is imported packed tower bottom upwards flow, the seawater that will contain sodium base fulvic acid flows into packed tower by circulatory pool, and spray contacts with flue gas adverse current downwards; Fully reaction absorbs SO2, through the circulatory pool absorption that repeatedly circulates, because sodium base fulvic acid is a kind of strong base-weak acid salt; Not only have alkalescent, can increase the basicity of seawater, and be a kind of pH buffer; Can slow down the reduction of absorption liquid pH value, thereby strengthen the Sulfur capacity of seawater, improve desulfuration efficiency;
F, wait to absorb SO2 saturated after, in the future the acid seawater in self-loopa pond flows in the neutralization pond, fully mixes with alkaline seawater from gas cooler;
Seawater after g, the neutralization flows in the aeration tank, blasts an amount of air, and the sulfite oxidation that desulfurization in the seawater is generated is to stablize harmless sulfate, makes seawater pH value rise to 6.5 and enters later the sea.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102942573A CN102784555A (en) | 2012-08-19 | 2012-08-19 | Method for strengthening seawater desulphurization by sodium fulvic acid |
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| CN2012102942573A CN102784555A (en) | 2012-08-19 | 2012-08-19 | Method for strengthening seawater desulphurization by sodium fulvic acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394275A (en) * | 2013-07-24 | 2013-11-20 | 张光太 | Process for synchronously removing SO2 and NOX out of flue gas of coal-fired boiler and controlling haze by seawater method |
| CN105457474A (en) * | 2015-12-16 | 2016-04-06 | 无锡蓝天电子有限公司 | Marine exhaust axial and radial flow desulfurization tower based on exhaust radial or axial and radial flowing |
| CN115337775A (en) * | 2022-08-18 | 2022-11-15 | 四川恒乐达能源工程有限公司 | Complex iron desulfurizer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017349A (en) * | 1989-03-21 | 1991-05-21 | The University Of Tennessee Research Corporation | Method for desulfurization of flue gases |
| CN1416940A (en) * | 2001-11-08 | 2003-05-14 | 中国石化上海石油化工股份有限公司 | Method of utilizing sea water to eliminate SO2 from fume |
| CN101703881A (en) * | 2009-11-17 | 2010-05-12 | 中国石油集团长城钻探工程有限公司 | Method for protecting carbon and desulfurizing boiler flue gas |
| CN201603514U (en) * | 2010-02-05 | 2010-10-13 | 广东省电力设计研究院 | Raw gas temperature reducing device used for seawater desulfurization system |
| CN101920158A (en) * | 2010-09-02 | 2010-12-22 | 上海交通大学 | Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method |
-
2012
- 2012-08-19 CN CN2012102942573A patent/CN102784555A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017349A (en) * | 1989-03-21 | 1991-05-21 | The University Of Tennessee Research Corporation | Method for desulfurization of flue gases |
| CN1416940A (en) * | 2001-11-08 | 2003-05-14 | 中国石化上海石油化工股份有限公司 | Method of utilizing sea water to eliminate SO2 from fume |
| CN101703881A (en) * | 2009-11-17 | 2010-05-12 | 中国石油集团长城钻探工程有限公司 | Method for protecting carbon and desulfurizing boiler flue gas |
| CN201603514U (en) * | 2010-02-05 | 2010-10-13 | 广东省电力设计研究院 | Raw gas temperature reducing device used for seawater desulfurization system |
| CN101920158A (en) * | 2010-09-02 | 2010-12-22 | 上海交通大学 | Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394275A (en) * | 2013-07-24 | 2013-11-20 | 张光太 | Process for synchronously removing SO2 and NOX out of flue gas of coal-fired boiler and controlling haze by seawater method |
| CN105457474A (en) * | 2015-12-16 | 2016-04-06 | 无锡蓝天电子有限公司 | Marine exhaust axial and radial flow desulfurization tower based on exhaust radial or axial and radial flowing |
| CN115337775A (en) * | 2022-08-18 | 2022-11-15 | 四川恒乐达能源工程有限公司 | Complex iron desulfurizer |
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Application publication date: 20121121 |