CN103611406A - Magnetic separation device and method for sulfur dioxide in smoke - Google Patents
Magnetic separation device and method for sulfur dioxide in smoke Download PDFInfo
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- CN103611406A CN103611406A CN201310663675.XA CN201310663675A CN103611406A CN 103611406 A CN103611406 A CN 103611406A CN 201310663675 A CN201310663675 A CN 201310663675A CN 103611406 A CN103611406 A CN 103611406A
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Abstract
The invention discloses a magnetic separation device for sulfur dioxide in smoke. The magnetic separation device comprises a smoke washing cooling tower and a plurality of sets of magnetic desulfurization device units, wherein each set of the magnetic desulfurization device unit comprises a pressurizing pump, an agitating machine, a magnetic separation pipe and a centrifugal machine which are connected in sequence; the magnetic desulfurization device units are divided into various separation grades and various concentration grades. Smoke including oxysulfide or other industrial waste gas is discharged into the smoke washing cooling tower to be washed to cool the washing water to 48-52 DEG C; the washing water passes through the pressurizing pumps and the agitating machines and enters the magnetic separation pipes; under the diffusion effect of opposite magnetic fields of the magnetic separation pipes, sulfuric acid and the water are separated to be close to pipe walls of the magnetic separation pipes, are enriched and then enter the centrifugal machines. Low-concentration industrial sulfuric acid is obtained by a plurality of grades of separation and concentration. The magnetic separation device has the good desulfurization effect; the whole technological process does not use a desulfurization agent; phenomena of scaling, blocking, corroding, abrading equipment and the like do not occur, and the emission and pollution problems of desulfurization byproducts are avoided; meanwhile, the emission amount of CO2 is not increased.
Description
Technical field
The present invention relates to flue gas desulfurization technique field, specifically a kind of device method of the oxysulfide such as sulfur dioxide in separating flue or in other industrial waste gas.
Background technology
In burning institute emission gases or the oxysulfides such as sulfur dioxide in other industrial waste gas be the main factor that forms acid rain, and building, soil and the mankind's living environment has been arrived in acid rain serious harm; Therefore, must take technological means by its before fume emission except from, this process is referred to as flue gas desulfurization; At present flue gas desulfurization technique has tens kinds, but the most ripe be that wet fuel gas desulfurizing technology flow process, form and mechanism are similar, be mainly to use lime stone (CaCO
3), lime (CaO) or sodium carbonate (Na
2cO
3) etc. slurries make desulfurizing agent, in reaction tower, flue gas is washed, thereby removes the SO in flue gas
2; This technique history of existing 50 years, through after Improvement and perfection constantly, technology comparative maturity, has desulfuration efficiency high (90%～98%), and unit capacity is large, and coal adaptability is strong, and the lower and byproduct of operating cost is the advantage such as recovery easily; Countries in the world (as China, the U.S., Germany, Japan etc.) are in large thermal power plant, more than 90% adopt wet type lime/lime stone-gypsum method flue gas desulfurization technique flow process, but lime/lime stone technique has its potential defect, main manifestations is incrustation, obstruction, corrosion and the wearing and tearing of equipment, and increases CO
2discharge capacity, desulfurizing byproduct---desulfurated plaster also needs to fully utilize again, otherwise pollutes the environment; Therefore, need to innovate existing flue gas desulfurization technique, provide can overcome above-mentioned shortcoming, technique and the device of the oxysulfide such as sulfur dioxide in efficient separating flue or in other industrial waste gas.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lime stone (CaCO that do not use
3), lime (CaO) or sodium carbonate (Na
2cO
3) etc. the magnetic separating device of sulfur dioxide in flue gas of desulfurizing agent.
For solving above technical problem, the following technical scheme that the present invention adopts.
A kind of magnetic separating device of sulfur dioxide in flue gas, comprise flue gas washing temperature-reducing tower and some groups of magnetic desulfurizer unit, every group of magnetic desulfurizer unit comprises force (forcing) pump, mixer, magnetic separator tube and the centrifuge connecting successively, wherein, force (forcing) pump connects flue gas washing temperature-reducing tower, magnetic separator tube is made by nonmagnetic material, radially evenly embeds a plurality of ndfeb magnets on the tube wall of magnetic separator tube, and the center line of the same pole of all magnetic patch comes together in the center of circle of magnetic separator tube.
As preferred technical scheme, the residual magnetic flux density of ndfeb magnet is 1.1T～1.3T.
As preferred technical scheme, the interior diameter of magnetic separator tube is 200 ㎜～300 ㎜.
As preferred technical scheme, the length of magnetic separator tube is 10-15 times of its interior diameter.
As preferred technical scheme, described magnetic desulfurizer unit is divided into first from different levels and concentrated at different levels, concentrated at different levels being connected in just from rear portions at different levels.
As preferred technical scheme, described each device interior concentrated at different levels is equipped with anticorrosive PTFE coating.
The present invention also provides a kind of magnetism separate method that makes the sulfur dioxide in flue gas of the said equipment, the method be by the flue gas that contains oxysulfide or other industrial waste gas enter after flue gas washing temperature-reducing tower, through gas scrubbing process, make the oxysulfide in gas water-soluble, and make water for cooling to the 48 ° C～52 ° C after washing; Water after washing enters magnetic separator tube after by force (forcing) pump and mixer; Under the disperse function of the opposition magnetic field of magnetic separator tube, sulfuric acid and water are separated near the also enrichment of tube wall of magnetic separator tube, enter subsequently centrifuge, under the centrifugal motion effect of centrifuge, the sulfuric acid of boundary layer is separated, through multi-stage separation and the low industrial sulphuric acid of concentrated acquisition.
The present invention can be efficiently separates the oxysulfide such as sulfur dioxide in flue gas or in other industrial waste gas, and desulfurized effect is good, and desulfurization degree reaches more than 90%, and is condensed into industrial low sulfuric acid, and whole technical process is not used lime stone (CaCO
3), lime (CaO) or sodium carbonate (Na
2cO
3) etc. desulfurizing agent; There is no the phenomenons such as incrustation, obstruction, corrosion and wearing and tearing of equipment and discharge and the pollution problem of desulfurizing byproduct, also do not increase CO simultaneously yet
2discharge capacity is the flue gas desulphurization system apparatus and method that a kind of cost performance is very high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of system and device of the present invention and technological process.
Fig. 2 is magnetic separator tube profile of the present invention.
In figure, 1-flue gas washing temperature-reducing tower, 2-force (forcing) pump, 3-mixer, 4-magnetic separator tube, 5-centrifuge, 6-ndfeb magnet, 7-circulating water pipe, C1-is first from one-level, and C2-is first from secondary, and C3-is just from three grades, and N1-concentrates one-level, and N2-concentrates secondary, concentrated three grades of N3-.
The specific embodiment
In order to make those skilled in the art better understand the present invention, below in conjunction with accompanying drawing, the present invention is done to further clear, complete explanation.
The magnetic separating device of a kind of sulfur dioxide in flue gas of the present invention, comprise flue gas washing temperature-reducing tower 1 and some groups of magnetic desulfurizer unit, every group of magnetic desulfurizer unit comprises force (forcing) pump 2, mixer 3, magnetic separator tube 4 and the centrifuge 5 connecting successively, wherein, force (forcing) pump 2 connects flue gas washing temperature-reducing tower 1, magnetic separator tube 4 is made by nonmagnetic material, as copper, aluminium alloy etc., on the tube wall of magnetic separator tube 4, radially evenly embed a plurality of ndfeb magnets 6, the center line of the same pole of all magnetic patch 6 comes together in the center of circle of magnetic separator tube 4.
Flue gas washing temperature-reducing tower 1, pressure pump 2, high-speed continuous mixer and centrifuge 5 are all equipment conventional, that meet drainability.
In order to improve magnetic separating effect, following parameter that the present invention is preferred: the residual magnetic flux density of ndfeb magnet 6 is 1.1T～1.3T, the interior diameter of magnetic separator tube 4 is 200 ㎜～300 ㎜, the length of magnetic separator tube 4 is 10-15 times of its interior diameter, and the length of magnetic separator tube is directly proportional to its interior diameter.
Because each separating effect is limited, whole flue gas desulfurization course needs classification to complete.Magnetic desulfurizer unit is divided into first from different levels and concentrated at different levels, concentrated at different levels being connected in just from rear portions at different levels.As shown in Figure 1, comprise first from one-level C1, just from secondary C2, just from three grades of C3, and concentrated one-level N1, concentrated secondary N2, concentrated three grades of N3.Just from different levels identical with basic structure concentrated at different levels.In order to prevent from improving concentrated antiseptic property at different levels, concentrated each device interior at different levels is equipped with anticorrosive PTFE coating.
In the flue gas that contains the oxysulfides such as sulfur dioxide or other industrial waste gas enter after flue gas washing temperature-reducing tower 1, through gas scrubbing process, make the oxysulfides such as sulfur dioxide in gas water-soluble, and make water for cooling to the 48 ° C～52 ° C after washing, otherwise can affect desulfurized effect; Water after washing enters the first magnetic separator tube 4 from one-level after by force (forcing) pump 2 and mixer 3; Because sulfuric acid is strong electrolyte, there is rapidly secondary ionization in water-soluble meeting, produces two hydrogen ions and a sulfate ion; Therefore, utilize physicochemical properties and the light water of these ions to have very large otherness, under the disperse function of the opposition magnetic field of magnetic separator tube 4, sulfuric acid and water are separated near the also enrichment of tube wall of magnetic separator tube 4, enter subsequently centrifuge 5, under the centrifugal motion effect of centrifuge 5, the sulfuric acid of boundary layer is separated, through multi-stage separation and the low industrial sulphuric acid of concentrated acquisition.Liquid after concentrated is the industrial sulphuric acid of low concentration, and concentration is 15%～20%; And can returning to flue gas washing temperature-reducing tower by circulating water pipe 7, water after separation recycles.
Because each separating effect is limited, whole flue gas desulfurization course needs classification to complete, and water after separation can recycle, and again enters flue gas washing temperature-reducing tower.The rotating speed of centrifuge is controlled at 800 revs/min～1000 revs/min, mixer employing continuous high-speed mixer, and rotating speed is controlled at more than 2800 revs/min, ensures that current are to corkscrew.
The scope of protection of present invention is not limited to the above specific embodiment; to those skilled in the art; the present invention can have various deformation and change, all any modifications of doing within design of the present invention and principle, improves and is equal within replacement all should be included in protection scope of the present invention.
Claims (7)
1. the magnetic separating device of a sulfur dioxide in flue gas, it is characterized in that: comprise flue gas washing temperature-reducing tower (1) and some groups of magnetic desulfurizer unit, every group of magnetic desulfurizer unit comprises the force (forcing) pump (2) connecting successively, mixer (3), magnetic separator tube (4) and centrifuge (5), wherein, force (forcing) pump (2) connects flue gas washing temperature-reducing tower (1), magnetic separator tube (4) is made by nonmagnetic material, on the tube wall of magnetic separator tube (4), radially evenly embed a plurality of ndfeb magnets (6), the center line of the same pole of all magnetic patch (6) comes together in the center of circle of magnetic separator tube (4).
2. device according to claim 1, is characterized in that: the residual magnetic flux density of ndfeb magnet (6) is 1.1T～1.3T.
3. device according to claim 1, is characterized in that: the interior diameter of magnetic separator tube (4) is 200 ㎜～300 ㎜.
4. according to the device described in claim 1,2 or 3, it is characterized in that: the length of magnetic separator tube (4) is 10-15 times of its interior diameter.
5. device according to claim 1, is characterized in that: described magnetic desulfurizer unit is divided into first from different levels and concentrated at different levels concentrated at different levels being connected in just from rear portions at different levels.
6. device according to claim 5, is characterized in that: described each device interior concentrated at different levels is equipped with anticorrosive PTFE coating.
7. the magnetism separate method of a sulfur dioxide in flue gas, it is characterized in that: in the flue gas that contains oxysulfide or other industrial waste gas enter (1) after flue gas washing temperature-reducing tower, through gas scrubbing process, make the oxysulfide in gas water-soluble, and make water for cooling to the 48 ° C～52 ° C after washing; Water after washing enters magnetic separator tube (4) after by force (forcing) pump (2) and mixer (3); Under the disperse function of the opposition magnetic field of magnetic separator tube (4), sulfuric acid and water are separated near the also enrichment of tube wall of magnetic separator tube (4), enter subsequently centrifuge (5), under the centrifugal motion effect of centrifuge (5), the sulfuric acid of boundary layer is separated, through multi-stage separation and the low industrial sulphuric acid of concentrated acquisition.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763022A (en) * | 2019-04-02 | 2020-10-13 | 上海梅山钢铁股份有限公司 | Method for preparing desulfurized gypsum by using dry-process desulfurized fly ash |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162536A1 (en) * | 1984-02-20 | 1985-11-27 | Babcock-Hitachi Kabushiki Kaisha | Apparatus for wet type flue gas desulfurization |
| JP2003144849A (en) * | 2001-11-15 | 2003-05-20 | Mitsubishi Heavy Ind Ltd | Exhaust gas desulfurization system and method therefor |
| CN102151480A (en) * | 2011-04-29 | 2011-08-17 | 长沙华泰环保设备工程有限公司 | Boiler flue gas desulfurization method and device |
| CN102343211A (en) * | 2011-10-08 | 2012-02-08 | 湖北双环科技股份有限公司 | Method for desulfurizing flue gas of combustion boiler |
| CN103183442A (en) * | 2012-08-31 | 2013-07-03 | 大庆市乾晟机械制造有限公司 | Water treatment technology adopting oil-sludge magnetic separation |
| CN203043828U (en) * | 2013-01-10 | 2013-07-10 | 贵州开磷（集团）有限责任公司 | Sulfur-containing tail gas washing device |
-
2013
- 2013-12-10 CN CN201310663675.XA patent/CN103611406B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162536A1 (en) * | 1984-02-20 | 1985-11-27 | Babcock-Hitachi Kabushiki Kaisha | Apparatus for wet type flue gas desulfurization |
| JP2003144849A (en) * | 2001-11-15 | 2003-05-20 | Mitsubishi Heavy Ind Ltd | Exhaust gas desulfurization system and method therefor |
| CN102151480A (en) * | 2011-04-29 | 2011-08-17 | 长沙华泰环保设备工程有限公司 | Boiler flue gas desulfurization method and device |
| CN102343211A (en) * | 2011-10-08 | 2012-02-08 | 湖北双环科技股份有限公司 | Method for desulfurizing flue gas of combustion boiler |
| CN103183442A (en) * | 2012-08-31 | 2013-07-03 | 大庆市乾晟机械制造有限公司 | Water treatment technology adopting oil-sludge magnetic separation |
| CN203043828U (en) * | 2013-01-10 | 2013-07-10 | 贵州开磷（集团）有限责任公司 | Sulfur-containing tail gas washing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763022A (en) * | 2019-04-02 | 2020-10-13 | 上海梅山钢铁股份有限公司 | Method for preparing desulfurized gypsum by using dry-process desulfurized fly ash |
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| CB03 | Change of inventor or designer information |
Inventor after: Shi Xiufeng Inventor after: Wang Jinping Inventor after: Han Lingcui Inventor after: Wu Xu Inventor after: Pan Hanming Inventor after: Zhang Li Inventor after: Ren Qinqin Inventor after: Guo Jianwei Inventor after: Sun Fei Inventor before: Han Lingcui Inventor before: Wu Xu Inventor before: Pan Hanming Inventor before: Zhang Li Inventor before: Ren Qinqin Inventor before: Guo Jianwei Inventor before: Sun Fei |
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Free format text: CORRECT: INVENTOR; FROM: HAN LINGCUI WU XU PAN HANMING ZHANG LI REN QINQIN GUO JIANWEI SUN FEI TO: SHI XIUFENG WANG JINPING HAN LINGCUI WU XU PAN HANMING ZHANG LI REN QINQIN GUO JIANWEI SUN FEI |
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Granted publication date: 20150902 Termination date: 20161210 |
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