CN102120126A - Preparation method of Mg(OH)2 slurry in marine desulfurization system by virtue of magnesium base-seawater method - Google Patents
Preparation method of Mg(OH)2 slurry in marine desulfurization system by virtue of magnesium base-seawater method Download PDFInfo
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- CN102120126A CN102120126A CN 201110039592 CN201110039592A CN102120126A CN 102120126 A CN102120126 A CN 102120126A CN 201110039592 CN201110039592 CN 201110039592 CN 201110039592 A CN201110039592 A CN 201110039592A CN 102120126 A CN102120126 A CN 102120126A
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Abstract
The invention discloses a preparation method of a Mg(OH)2 slurry in a marine desulfurization system by virtue of a magnesium base-seawater method. The device utilized in the method mainly comprises a slurry tank, an electric mixing rotary vane, a temperature probe, a flowmeter, an electric steam valve, a feed hole, a discharge hole, a steam heating pipeline, a condensation drain pipe and the like. The magnesium oxide powder, seawater and a dispersing agent are mixed in a certain proportion and are heated at a constant temperature and uniformly mixed to prepare a 10-25% slurry, and then the slurry is transferred by a variable-frequency pipeline pump to a desulfurizing tower, so that the purpose of desulfurization is achieved. In the method, the seawater can be directly taken for use, so that the process is simple and convenient, the Mg(OH)2 with smaller grain size and better appearance can be prepared, the problems such as scaling, blocking and the like in the desulfurization system can be effectively avoided, and the continuous high-efficient desulfurization reliability is ensured.
Description
Technical field
The present invention relates to the flue gas desulfurization technique field, refer more particularly to Mg (OH) in magnesium method and the seawater method desulphurization system
2Blank preparation technics.
Background technology
The most successful desulfur technology that reaches commercial Application is a chemical method at present, and with respect to dry method and semidry method, wet desulphurization is used widely with its mature technique.Magnesium base-sea water desulfuration method desulfuration efficiency height, non-secondary pollution, take that volume is little, non-scaling, operating cost be low, considered again simultaneously that seawater obtains easy fresh water on the ship and obtained difficulty, combining the common advantage of desulfurization of magnesium method and the desulfurization of seawater method, is a kind of novelty and sulfur method efficiently.
Existing magnesium method desulfur technology absorbs lime stone gypsum law technology mostly and produces, though the not last magnesian technology of utilizing of optimizing that improves to some extent.Only still there is variety of problems, can not satisfies long-term, the stable specification requirement of user with the pulping system domestic technique.
In order to improve desulfuration efficiency, Mg (OH)
2The activity of slurry becomes a main technological parameter, i.e. Mg (OH)
2The source of desulfurizing agent becomes restriction M﹠amp; The key factor of S flue gas desulfurization law technology development.Chinese patent CN1291588A discloses the calcining of a kind of magnesite and has generated light calcined magnesia, and the light calcined magnesia hydrolysis generates the new technology of magnesium hydroxide, inevitably produces residue during the magnesium hydroxide desulfurizing agent of this explained hereafter.Chinese patent CN1309087 discloses the manufacture method of a kind of magnesium hydroxide and suspension thereof, this method mixed grinding light calcined magnesia in the presence of low amounts of water, and in the presence of certain moisture, powder shape magnesium hydroxide is made in slaking at a certain temperature then.It is wayward and cause hydrolysis insufficient that practical operation finds that magnesia is hydrolyzed into the condition of magnesium hydroxide, causes magnesium hydroxide and sour composition reaction speed slow, and promptly the desulphurization reaction activity is low, can not satisfy high efficiency desulfurization requirement.
To sum up, it is good that this area lacks a kind of reactivity, and the desulfuration efficiency height is effectively avoided problem such as fouling, obstruction in the desulphurization system, and do not have the Mg (OH) of secondary pollution
2The preparation technology of desulfurizing agent.
Summary of the invention
For realizing that magnesium base-seawater method desulfur technology is applied to boats and ships flue gas high-efficiency desulfurization, guarantee desulfurizer reliably and with long-term, operation up to standard, the invention provides Mg (OH) in a kind of magnesium base-seawater method desulphurization system peculiar to vessel
2Slurry preparation method is prepared highly active Mg (OH)
2Slurry.
Magnesium base-seawater method desulphurization system peculiar to vessel mainly comprises desulfurizing tower, cooled with seawater sprayer unit, slurry tank, multi-stage spray device, seawater, be provided with slurry pool in described desulfurizing tower bottom, slurry pool top is the multi-stage spray device, by oxidation fan aerating oxygen in slurry pool, feed seawater by new water pump in slurry pool, the slurry pool bottom is provided with excavationg pump; Described slurry tank be provided with steam, magnesia powder, seawater pipeline, wherein jet chimney is provided with electronic steam valve, seawater pipeline is provided with the seawater flow meter, be provided with agitator in the slurry tank, slurry tank lower end discharge pipe is provided with the frequency conversion tubing pump, also is provided with the slurry flow meter on the discharge pipe and is connected to the multi-stage spray device; The multi-stage spray device also is connected to slurry pool by spray pump; Boiler smoke enters the cooled with seawater sprayer unit through the smoke discharging pipe that is provided with electric butterfly valve, frequency conversion fan, flue gas flow meter successively, and the cooled with seawater sprayer unit is along the spraying of boiler smoke direction of ventilation, and the boiler smoke through cooling off enters desulfurizing tower; The desulfurizing tower top is provided with demist net and new water spray system, and flue gas enters chimney and discharge from the exhaust opening of desulfurizing tower after handling, and the exhaust opening sidewall is provided with SO
2The analyzer probe; Also be provided with pH meter, float type level gauge in the slurry pool.
By Mg (OH)
2Slurry multi-stage spray device, slurry pH regulation and control, plumbing control develop this magnesium base-seawater method desulphurization system peculiar to vessel, and pass through SO
2Corresponding optimization operational factor is determined in concentration determination, implement device reliably and with long-term, operation up to standard.
Principle of the present invention is: be equipped with magnesium hydroxide Mg (OH) with magnesia aquation legal system
2Water around magnesia at first adsorbs, reaction forms the magnesium hydroxide crystallite.Add dispersant and can reduce the surface energy effectively, prevent particle agglomeration and grow up that by steric hindrance and Coulomb repulsion effect it is littler to make particle diameter, the Mg (OH) that pattern is better
2, effectively avoided problems such as the fouling in the desulphurization system, obstruction, guarantee to continue the reliability of high-efficiency desulfurization.
The present invention is achieved through the following technical solutions: Mg (OH) in magnesium base-seawater method desulphurization system peculiar to vessel
2Capital equipment comprises parts such as slurry tank, electronic stirring vane, temp probe, flowmeter, electronic steam valve, charging aperture, discharging opening, steam-heated pipe line, condensate drainage pipe in the slurry preparation method, control steady temperature, mixing speed, the normal pressure optimum hydration condition of curing time are with the legal preparation of magnesia hot water Mg (OH)
2Slurry.
Flowmeter cooperates motor-driven valve control seawater quantitatively to be introduced in the slurry tank by pipeline, adds magnesia powder (magnesium oxide granularity is 200 orders and impure few) through charging aperture, and dropping into seawater and magnesian mass ratio is 8: 2; Utilize on the ship heat steam respectively by different pipelines heating slurry tank housings (sandwich) and inside, condensed water is discharged by lower drain port, heats to guarantee circulation.Temp probe immediately monitoring slurry temperature is housed in the slurry tank, controls the material temperature automatically by attemperating unit and keep 80～90 ℃ of constant temperature.Electronic stirring vane mixing speed is 400r/min.Curing time 2h throws in micro-dispersant more under these conditions, and its quality accounts for 3% of gross mass, and continuing to stir slaking 1h can provide quantitative slurry to spray through the frequency conversion tubing pump to desulfurizing tower spray pipings at different levels by discharging opening output slurry at the bottom of the slurry tank.Slurry quantity delivered and spray flux are fed back electrical apparatus control system control automatically by pH auto-control in the slurry pool and multichannel.
Effect of the present invention and benefit are preparation Mg (OH)
2Slurry is active high, and it is few to produce residue, not blocking pipe.Directly get seawater and be used, solved marine problem of getting the fresh water difficulty.And make full use of the self-produced steam heating of ship, directly save operating cost.Supply with control by temperature automatic regulating system and slurry, guaranteed high desulfurization efficiency, guarantee M﹠amp peculiar to vessel; S desulfurizer safety, reliable, up to standard operation.
Description of drawings
The present invention will be further described below in conjunction with accompanying drawing and concrete embodiment.
Fig. 1 is magnesium base-seawater method desulphurization system schematic diagram peculiar to vessel.
The structure principle chart of the slurry tank that Fig. 2 this method relates to.
Among the figure, 1, desulfurizing tower, 2, slurry tank, 3, chimney, 4, slurry pool, 5, seawater, 6, steam, 7, magnesia powder, 8, new water pump, 9, the seawater flow meter, 10, motor-driven valve, 11, electronic steam valve, 12, frequency conversion tubing pump, 13, the slurry flow meter, 14, spray pump, 15, excavationg pump, 16, waste liquid, 17, oxidation fan, 18, boiler smoke, 19, electric butterfly valve, 20, frequency conversion fan, 21, the flue gas flow meter, 22, handle back gas.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Mg (OH) to preparing after real ship is used this method on certain container ship
2Percentage is tested.The control liquid-solid ratio is seawater and magnesia quality ratio, hydration temperature, curing time, 4 influence factors of mixing speed, draws the Mg (OH) of preparation according to used MgO breeze composition proportion (reference table 1)
2Percentage also compares, and determines the optimum hydration condition.Test result such as table 2:
Each component content of table 1MgO breeze
| NaOH | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO |
| 8.49％ | 4.27％ | 0.25％ | 0.75％ | 1.24％ | 85％ |
Table 2 preparation Mg (OH)
2The experiment orthogonal table
(following one page)
By test result as can be seen to Mg (OH)
2The activity influence significance level is A＞C＞B＞D.Solid-to-liquid ratio is to Mg (OH)
2Activity influence is much larger than other three factors.Experiment preferred plan is A1B2C2D3, i.e. solid-to-liquid ratio 8: 2,80 ℃ of hydration temperatures, curing time 2h, mixing speed 400rmin
-1
The present invention is not limited to the foregoing description, and protection scope of the present invention is all classified in any equivalent concepts or change in the technical scope that the present invention discloses as.
Claims (1)
1. Mg (OH) in magnesium base-seawater method desulphurization system peculiar to vessel
2Slurry preparation method is characterized in that: flowmeter cooperates motor-driven valve control seawater quantitatively to be introduced in the slurry tank by pipeline, adds magnesia powder through charging aperture, and dropping into seawater and magnesian mass ratio is 8: 2; Utilize on the ship heat steam respectively by different pipelines heating slurry tank housings and inside, condensed water is discharged by lower drain port; Temp probe immediately monitoring slurry temperature is housed in the slurry tank, controls the material temperature automatically by attemperating unit and keep 80～90 ℃ of constant temperature; Electronic stirring vane mixing speed is 400r/min; Curing time 2h throws in micro-dispersant more under these conditions, and its quality accounts for 3% of gross mass, and continuing to stir slaking 1h can provide quantitative slurry to spray through the frequency conversion tubing pump to desulfurizing tower spray pipings at different levels by discharging opening output slurry at the bottom of the slurry tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110039592 CN102120126A (en) | 2011-02-17 | 2011-02-17 | Preparation method of Mg(OH)2 slurry in marine desulfurization system by virtue of magnesium base-seawater method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110039592 CN102120126A (en) | 2011-02-17 | 2011-02-17 | Preparation method of Mg(OH)2 slurry in marine desulfurization system by virtue of magnesium base-seawater method |
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| CN102120126A true CN102120126A (en) | 2011-07-13 |
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| CN 201110039592 Pending CN102120126A (en) | 2011-02-17 | 2011-02-17 | Preparation method of Mg(OH)2 slurry in marine desulfurization system by virtue of magnesium base-seawater method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9387438B2 (en) | 2014-02-14 | 2016-07-12 | Tenneco Automotive Operating Company Inc. | Modular system for reduction of sulphur oxides in exhaust |
| CN106310942A (en) * | 2016-10-31 | 2017-01-11 | 许仁忠 | Treating device for engine exhaust emission of vehicle or mechanical engineering |
| CN112755747A (en) * | 2020-12-15 | 2021-05-07 | 辽宁荣邦科技有限公司 | Instant magnesium hydroxide desulfurizer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06246129A (en) * | 1993-02-26 | 1994-09-06 | Mitsubishi Heavy Ind Ltd | Flue gas desulfurizing method |
| CN201271566Y (en) * | 2008-05-26 | 2009-07-15 | 陆俊华 | Magnesia wet flue gas desulfurization device |
| CN101628199A (en) * | 2008-07-17 | 2010-01-20 | 中国石化集团宁波工程有限公司 | Improved magnesium method flue gas desulphurization technique |
| CN201558666U (en) * | 2009-08-10 | 2010-08-25 | 煤炭科学研究总院杭州环境保护研究所 | Fume desulfurizing equipment for fuel furnace |
-
2011
- 2011-02-17 CN CN 201110039592 patent/CN102120126A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06246129A (en) * | 1993-02-26 | 1994-09-06 | Mitsubishi Heavy Ind Ltd | Flue gas desulfurizing method |
| CN201271566Y (en) * | 2008-05-26 | 2009-07-15 | 陆俊华 | Magnesia wet flue gas desulfurization device |
| CN101628199A (en) * | 2008-07-17 | 2010-01-20 | 中国石化集团宁波工程有限公司 | Improved magnesium method flue gas desulphurization technique |
| CN201558666U (en) * | 2009-08-10 | 2010-08-25 | 煤炭科学研究总院杭州环境保护研究所 | Fume desulfurizing equipment for fuel furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9387438B2 (en) | 2014-02-14 | 2016-07-12 | Tenneco Automotive Operating Company Inc. | Modular system for reduction of sulphur oxides in exhaust |
| CN106310942A (en) * | 2016-10-31 | 2017-01-11 | 许仁忠 | Treating device for engine exhaust emission of vehicle or mechanical engineering |
| CN112755747A (en) * | 2020-12-15 | 2021-05-07 | 辽宁荣邦科技有限公司 | Instant magnesium hydroxide desulfurizer |
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Application publication date: 20110713 |