CN101249373A - Flue gas desulfurization agent - Google Patents
Flue gas desulfurization agent Download PDFInfo
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- CN101249373A CN101249373A CNA2007101949447A CN200710194944A CN101249373A CN 101249373 A CN101249373 A CN 101249373A CN A2007101949447 A CNA2007101949447 A CN A2007101949447A CN 200710194944 A CN200710194944 A CN 200710194944A CN 101249373 A CN101249373 A CN 101249373A
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Abstract
The invention relates to a desulfurizer, in particular to a stack gas desulfurizer, which primarily consists of active carbon powder, calcium hydroxide, carboxymethyl cellulose and natural mineral. The stack gas desulfurizer is prepared in the following steps that: firstly, the active carbon powder and the flaky sodium hydroxide are mixed according to the proportion of 1:0.4-1:1 by weight; water is added to the mixture while the mixture is stirred so that the concentration of sodium hydroxide solution ranges from 0.5 mol/L to 2mol/L; the mixture is stirred continuously; one to five hours later, the mixture is arranged in an oven, and is dried, thus obtaining a powdered component A; the component A of 20 percent to 60 percent of the final mass of the desulfurizer, quicklime of 20 percent to 60 percent of the final mass of the desulfurizer, carboxymethyl cellulose of 3 percent to 15 percent of the final mass of the desulfurizer, and natural mineral of 2 percent to 15 percent of the final mass of the desulfurizer are mixed after weighing, and are stirred with water adding in 8 to 15 times of the quicklime at the temperature from 20 DEG C to 35 DEG C; the mixture is stirred continuously before the mixture is arranged in an oven at the temperature of 80 DEG C for drying; subsequently, the dried mixture is taken out, and is compressed into strips and molded, thus obtained finished products. The invention makes use of the porous structure of the active carbon and the high reactivity of calcium hydroxide to sulfur dioxide for cooperation in desulphurization, and has low cost, high desulphurization percent and no secondary pollution.
Description
Technical field
The present invention relates to a kind of desulfurizing agent, specifically a kind of fume desulfurizing agent.
Background technology
China's energy-consuming expects the year two thousand twenty based on coal, and coal production will reach 3,000,000,000 tons. it is estimated that to reach the environmental carrying capacity of national quality secondary standard be 1,200 ten thousand tons to sulfur dioxide concentration in China's atmosphere, and coal fire discharged SO
2Surpass 2,000 ten thousand tons for years, cause China's acid rain and SO
2Pollution is on the rise.The area of acid rain influence has accounted for 30% of area.SO
2The direct economic loss that Chinese national economy is caused has accounted for 2% of GDP, and 3% of GNP has seriously hindered China's sustainable development of economy.The control sulfur dioxide pollution is imperative.The Chinese government attaches great importance to the sulfur dioxide pollution problem; " 11th Five-Year is " in the planning outline (environmental protection part) in national economy and social development; " strengthening prevention and control of air pollution and " partly clearly proposing to strengthen 113 key cities' prevention and control of air pollution dynamics; accelerate existing coal-burning power plant's desulfurization Facilities Construction; desulfurizer must be installed according to discharge standard by newly-built coal-burning power plant, advances the industry sulfur dioxide comprehensive regulations such as iron and steel, coloured, chemical industry, building materials.Add big city flue dust, dust, fine particle and treating vehicle exhaust dynamics." the environmental improvement key project " in, at the coal-fired plant flue gas desulfurization, propose to increase existing coal-burning power plant desulphurizing ability, make 90% existing power plant qualified discharge.
Processing form according to desulfurization method and product is divided, and flue gas desulfurization generally can be divided into wet method, dry method and semidry method three classes again.
The wet process of FGD technology is liquid or pulpous state absorbent desulfurization and processing desulfurization product under wet condition.This method has fast, the desulfuration efficiency advantages of higher of desulphurization reaction speed, but has investment and operation and maintenance cost is all very high, the desulfurization afterproduct is handled difficulty, easily cause problems such as secondary pollution, system complex, start and stop inconvenience.One desulfurization absorption of dry flue gas desulphurization technology and product are handled and are all carried out under dry state.This method has that no sewage and spent acid are discharged, equipment corrosion is little, flue gas in purification process cigarette temperature height after no obvious temperature drop, the purification, be beneficial to advantage such as chimney exhaust diffusion, but desulfuration efficiency is low, reaction speed slowly, equipment is huge.The semi-dry process flue gas desulphurization technology is to make the lime slurry that sprays into and the SO in the flue gas
2Reaction generates calcium sulfite etc., and utilizes obvious heat of smoke to make end product be the dry powder shape, has some characteristics of dry method and wet method concurrently, and it is a variety of that the semi-dry process flue gas desulphurization technology has, present comparative maturity spray drying process, in-furnace calcium spraying afterbody humidification activation method etc. are arranged.
The main material that uses in the flue gas desulfurization is a calcium-based desulfurizing agent, material such as the flyash that refers to contain lime stone, quick lime, white lime, gypsum or contain these materials, dolomite, calcium carbonate mud rock, industrial electro rock ballast and carry out the material that modification obtains on these material bases.Its desulfurization principle all is based on sulfur dioxide and these materials react.Calcium-based desulfurizing agent is mainly used in the process after the burning neutralization burning.Desulfurization is exactly in the coal process in burning, adds calcium-based desulfurizing agent, makes the sulphur in the coal generate harmless gypsum with the calcium reaction in combustion process, is fixed in the slag.It is flue gas desulfurization that calcium agent desulfurizing agent is used in burning back desulfurization.The characteristics of calcium-based desulfurizing agent are cheap and easy to get.But in dry desulfurizing process, desulfurization degree is lower.
Active carbon (Jiao) is the material that can select in the dry flue gas desulphurization practice.Active carbon (Jiao) absorption method is a kind of flue gas desulfurization method of comparative maturity, existing at home and abroad small-scale application.It can be with the SO of concentration in the flue gas
2Make various products again after concentrating and be used, both with control SO
2Discharging can reclaim the sulphur resource again.But have problem: 1. desulfuration efficiency is on the low side, and rate of sulphur expulsion is slow, and regeneration is frequent, has influenced industrialization promotion.2. washing regeneration water consumption is big, easily causes secondary pollution.3. activated carbon desulphurization agent and desulfurizer cost are higher.In addition, active carbon (Jiao) price is more expensive, thereby has limited the extensive use of this method.
Summary of the invention
Goal of the invention of the present invention is the many deficiencies at prior art, a kind of a kind of fume desulfurizing agent that is become with a kind of natural ore deposit local soil type by activated carbon powder, calcium hydroxide, the methyl fiber sodium that contracts is provided, it utilizes loose structure that active carbon has and the calcium hydroxide sound response performance coordinated desulfurization to sulfur dioxide, and cost is low, significant desulfurization effect, avoid secondary pollution.
Realize the foregoing invention purpose by the following technical solutions: a kind of fume desulfurizing agent, described desulfurizing agent are mainly become with natural ore deposit local soil type by activated carbon powder, calcium hydroxide, the sodium carboxymethylcellulose pyce that contracts, and specifically the preparation method is:
A. earlier activated carbon powder and flaky sodium hydrate are mixed in 1: 0.4～1: 1 ratio of mass ratio, add entry under stirring, the concentration that makes sodium hydroxide solution is 0.5～2mol.L
-1., continue to stir 1～5 hour, put into 50～80 ℃ of baking oven oven dry then and obtain powdered components A;
B. take by weighing component A 20～60% by final desulfurizing agent quality, quick lime 20～60%, sodium carboxymethylcellulose pyce 3～15% contracts, natural ore deposit soil 2～15%, stir the water that adds 20～35 ℃ of 8～15 times of amounts of quick lime down, continue then to stir 1～5 hour, put into 80 ℃ of baking ovens at last and dry the moulding of 18～24 hours taking-up press strips, both got the tobacco product gas desulfurizer.
Adopt technique scheme, compared with prior art, the present invention utilizes loose structure that active carbon has and calcium hydroxide to the sound response performance coordinated desulfurization of sulfur dioxide, reduces greatly than independent use active carbon desulfurization cost; Active carbon and calcium hydroxide through the NaOH modification have compatibility preferably, sodium carboxymethylcellulose pyce and a kind of natural ore deposit soil are down auxiliary contracting, this sulfur elimination can contain the moisture of holding q.s, promote on the one hand the reaction of sulfur dioxide and calcium hydroxide, made the regeneration of can spraying water of inactivation sulfur elimination on the other hand; This sulfur elimination is installed in the fixed bed reactors with graininess, and after desulfurization was finished, sulfur elimination existed with the dry state form, and desulfurization degree has been avoided the secondary pollution that may cause in the wet desulphurization between 60～90%.
The specific embodiment
Embodiment 1
Activated carbon powder and flaky sodium hydrate are pressed mass ratio mixing in 1: 0.5, add entry under stirring, the concentration that makes sodium hydroxide solution is 1mol.L
-1., continue to stir 2 hours, put into 50～80 ℃ of baking oven oven dry then and obtain powdered components A; Take by weighing component A, 50% quick lime, 8% contract sodium carboxymethylcellulose pyce, 7% natural ore deposit soil by mass ratio 35%, stir the water that adds 20 ℃ of 500 grams down, continue then to stir 2 hours, put into 80 ℃ of baking ovens at last and dry diel.Take out press strip moulding (diameter is about 2mm), promptly get desulfurizing agent.Use for the first time desulfurization degree 86%.
Embodiment 2
Activated carbon powder and flaky sodium hydrate are pressed mass ratio mixing in 1: 0.5, add entry under stirring, the concentration that makes sodium hydroxide solution is 1mol.L
-1., continue to stir 2 hours, put into 50～80 ℃ of baking oven oven dry then and obtain powdered components A; Take by weighing component A, 40% quick lime, 8% contract sodium carboxymethylcellulose pyce, 7% natural ore deposit soil by mass ratio 45%, stir the water that adds 20 ℃ of 500 grams down, continue then to stir 2 hours, put into 80 ℃ of baking ovens at last and dry diel.Take out press strip moulding (diameter is about 2mm), promptly get desulfurizing agent.Use for the first time desulfurization degree 80%.
Embodiment 3
Activated carbon powder and flaky sodium hydrate are pressed mass ratio mixing in 1: 0.5, add entry under stirring, the concentration that makes sodium hydroxide solution is 1mol.L
-1, continue to stir 2 hours, put into 50～80 ℃ of baking oven oven dry then and obtain powdered components A; Take by weighing component A, 40% quick lime, 8% contract sodium carboxymethylcellulose pyce, 7% natural ore deposit soil by mass ratio 45%, stir the water that adds 20 ℃ of 500 grams down, continue then to stir 2 hours, put into 80 ℃ of baking ovens at last and dry diel.Take out press strip moulding (diameter is about 2mm), promptly get desulfurizing agent.For the first time use desulfurization degree 80%, react that desulfurization degree takes out desulfurizing agent less than 60% after 5 hours, squirt and make it moisture percentage, use for the second time, desulfurization degree 81% 40%; After so using six times, desulfurization degree maintains more than 80%, begins to descend after the 7th time.
Natural ore deposit of the present invention soil is to contain aluminium oxide 39.40%, silica 45.75%, iron oxide 0.20% by weight percentage, the natural ore deposit soil of titanium dioxide 0.64% calcic or magnesium or other composition 14.01.Originate in the Inner Mongol.
Activated carbon powder and flaky sodium hydrate, quick lime, the sodium carboxymethylcellulose pyce that contracts all can be bought from the market.
Using method of the present invention: choosing length is 2～6mm desulfurizing agent, is installed in the fixed bed reactors, and temperature of reactor is controlled at 50～150 ℃, feeds the normal pressure simulated flue gas, and flue gas consists of SO
23%, 10% water, all the other are nitrogen, the flue gas air speed is 400～1200h
-1.2 hour in, this sulfur elimination desulphurizing ratio can be regenerated by squirting behind the inactivation 60～90%.
Claims (2)
1, a kind of fume desulfurizing agent is characterized in that: described desulfurizing agent is mainly become with natural ore deposit local soil type by activated carbon powder, calcium hydroxide, the sodium carboxymethylcellulose pyce that contracts, and concrete preparation method is:
A. earlier activated carbon powder and flaky sodium hydrate are mixed in 1: 0.4～1: 1 ratio of mass ratio, add entry under stirring, the concentration that makes sodium hydroxide solution is 0.5～2mol.L
-1., continue to stir 1～5 hour, put into 50～80 ℃ of baking oven oven dry then and obtain powdered components A;
B. take by weighing component A 20～60% by final desulfurizing agent quality, quick lime 20～60%, sodium carboxymethylcellulose pyce 3～15% contracts, natural ore deposit soil 2～15%, stir the water that adds 20～35 ℃ of 8～15 times of amounts of quick lime down, continue then to stir 1～5 hour, put into 80 ℃ of baking ovens at last and dry the moulding of 18～24 hours taking-up press strips, both got the tobacco product gas desulfurizer.
2, a kind of fume desulfurizing agent according to claim 1, it is characterized in that: described natural ore deposit soil is to contain aluminium oxide 39.40%, silica 45.75%, iron oxide 0.20% by weight percentage, titanium dioxide 0.64%, remainder are the natural ore deposit soil of calcium or magnesium 14.01%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101949447A CN101249373B (en) | 2007-12-07 | 2007-12-07 | Flue gas desulfurization agent preparation method |
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|---|---|---|---|
| CN2007101949447A CN101249373B (en) | 2007-12-07 | 2007-12-07 | Flue gas desulfurization agent preparation method |
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| CN101249373A true CN101249373A (en) | 2008-08-27 |
| CN101249373B CN101249373B (en) | 2010-12-15 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804289A (en) * | 2010-03-31 | 2010-08-18 | 淮阴工学院 | Preparation of flue gas desulfurizer and use and regeneration method thereof |
| CN101455936B (en) * | 2008-12-17 | 2011-09-07 | 武汉科技大学 | Flue gas desulfurization method based on hot carbon reduction |
| CN102836621A (en) * | 2012-09-28 | 2012-12-26 | 浙江商达环保有限公司 | Flue gas desulfurizing agent and preparation method thereof |
| CN105536489A (en) * | 2015-12-09 | 2016-05-04 | 安徽中泰创展环境科技有限公司 | Slurry for flue gas desulfurization |
| CN105727730A (en) * | 2016-03-22 | 2016-07-06 | 天津滨环化学工程技术研究院有限公司 | Efficient flue gas desulfurization and denitrification method and materials adopted by same |
| CN105771617A (en) * | 2016-03-22 | 2016-07-20 | 天津滨环化学工程技术研究院有限公司 | Flue gas desulfurization and denitrification method |
| CN105944553A (en) * | 2016-05-12 | 2016-09-21 | 张锐 | Quick waste gas desulphurization agent and preparation method thereof |
| CN108479374A (en) * | 2018-06-14 | 2018-09-04 | 江苏华本环境科技有限公司 | A kind of double tower desulfurizer |
| CN109433000A (en) * | 2018-12-04 | 2019-03-08 | 厦门朗净钙业科技有限公司 | A kind of desulfurization absorbent and its preparation method and application |
| CN112516780A (en) * | 2020-10-27 | 2021-03-19 | 蒲城驭腾新材料科技有限公司 | Calcium-based desulfurizer and preparation method thereof |
| CN114307576A (en) * | 2021-12-27 | 2022-04-12 | 山东嘉盛博纳环保科技有限公司 | Medium-low temperature desulfurizing agent and preparation method thereof |
| CN115337896A (en) * | 2022-07-22 | 2022-11-15 | 西南化工研究设计院有限公司 | Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof |
-
2007
- 2007-12-07 CN CN2007101949447A patent/CN101249373B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455936B (en) * | 2008-12-17 | 2011-09-07 | 武汉科技大学 | Flue gas desulfurization method based on hot carbon reduction |
| CN101804289A (en) * | 2010-03-31 | 2010-08-18 | 淮阴工学院 | Preparation of flue gas desulfurizer and use and regeneration method thereof |
| CN102836621A (en) * | 2012-09-28 | 2012-12-26 | 浙江商达环保有限公司 | Flue gas desulfurizing agent and preparation method thereof |
| CN105536489A (en) * | 2015-12-09 | 2016-05-04 | 安徽中泰创展环境科技有限公司 | Slurry for flue gas desulfurization |
| CN105727730A (en) * | 2016-03-22 | 2016-07-06 | 天津滨环化学工程技术研究院有限公司 | Efficient flue gas desulfurization and denitrification method and materials adopted by same |
| CN105771617A (en) * | 2016-03-22 | 2016-07-20 | 天津滨环化学工程技术研究院有限公司 | Flue gas desulfurization and denitrification method |
| CN105944553A (en) * | 2016-05-12 | 2016-09-21 | 张锐 | Quick waste gas desulphurization agent and preparation method thereof |
| CN108479374A (en) * | 2018-06-14 | 2018-09-04 | 江苏华本环境科技有限公司 | A kind of double tower desulfurizer |
| CN109433000A (en) * | 2018-12-04 | 2019-03-08 | 厦门朗净钙业科技有限公司 | A kind of desulfurization absorbent and its preparation method and application |
| CN109433000B (en) * | 2018-12-04 | 2021-12-24 | 厦门朗净钙业科技有限公司 | Desulfurization absorbent and preparation method and application thereof |
| CN112516780A (en) * | 2020-10-27 | 2021-03-19 | 蒲城驭腾新材料科技有限公司 | Calcium-based desulfurizer and preparation method thereof |
| CN114307576A (en) * | 2021-12-27 | 2022-04-12 | 山东嘉盛博纳环保科技有限公司 | Medium-low temperature desulfurizing agent and preparation method thereof |
| CN115337896A (en) * | 2022-07-22 | 2022-11-15 | 西南化工研究设计院有限公司 | Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof |
| CN115337896B (en) * | 2022-07-22 | 2023-12-01 | 西南化工研究设计院有限公司 | Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof |
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| CN101249373B (en) | 2010-12-15 |
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