CN1701837A - Technology for improving utilization rate of limestone desulfurizer in flue gas desulfurization - Google Patents
Technology for improving utilization rate of limestone desulfurizer in flue gas desulfurization Download PDFInfo
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- CN1701837A CN1701837A CN 200510046202 CN200510046202A CN1701837A CN 1701837 A CN1701837 A CN 1701837A CN 200510046202 CN200510046202 CN 200510046202 CN 200510046202 A CN200510046202 A CN 200510046202A CN 1701837 A CN1701837 A CN 1701837A
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- flue gas
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Abstract
This invention relates to desulfurization technique for SO2 in coal-fired gas, which comprises, take activating process in activation device to desulfurizing agent with gas contained CO2 before entering desulfurizing device; mixing slurry of limestone and water rolling driven by stirring paddle; activated slurry entering desulfurizing device through charging jar or directly; desulfurizing agent encountering the flue gas and removing its SO2. This invention can increase desulfurizing rate and its utilization rate.
Description
Technical field
The present invention relates to SO in the coal-fired flue-gas
2The technology that removes, what be specifically related to is to utilize lime stone (main component is CaCO
3) do in the wet method and semi-dry process flue gas desulphurization process of desulfurizing agent, improve the technology of limestone desulfurizer utilization rate.
Background technology
Flue gas desulfurization is control SO
2The major technique approach of discharging.In flue gas desulfurization industry, what generally adopt is to utilize desulfurizing agent to the SO in the flue gas
2The technical process that removes.In this sweetening process, desulfurizing agent plays crucial effects, and the utilization rate of desulfurizing agent is the greatest factor that influences the flue gas desulfurization course cost.
The lime stone source is abundant, price is low, be easy to transportation and storage, and and SO
2Reacted product is a gypsum, can be as the raw material of other production process and be utilized, and be one of desulfurizing agent of the most normal use in the flue gas desulfurization industry.But, not limestone desulfurizer desulphurizing activated not high, making generally needs bigger calcium amount surplus in the real process, and this causes the utilization rate of lime stone in flue gas desulfurization not high, has influenced the further reduction of flue gas desulfurization cost.
In order to improve the utilization rate of lime stone in flue gas desulfurization, present technical method is to wherein adding some other active material, as materials such as flyash.Though this process has reached the purpose that improves limestone desulfurization efficient and then improve its utilization rate, but the adverse consequences that is produced is the product after the desulfurization can not do the gypsum use too greatly because of impurity level, and has increased the cost of desulfurization under some situation because of other material that is added.Therefore, prior art does not still have fine solution under the prerequisite that does not influence the utilization of desulfurization product gypsum, improves limestone desulfurization efficient and then improves its utilization rate, this technical barrier of reduction desulphurization cost.
Summary of the invention
The objective of the invention is to propose the process that a kind of use cost is low, realization does not reduce the utilization rate of raising lime stone in flue gas desulfurization of gypsum product purity easily, again, this purpose contains CO by utilization
2Gas the processing procedure of limestone desulfurizer is realized.The technology of the present invention is applicable to the wet method of lime masonry desulfurizing agent and semi-dry process flue gas desulphurization process.
The objective of the invention is to be achieved through the following technical solutions:
This technical process is: limestone desulfurizer accepted to contain CO before entering desulphurization plant
2The activation processing of gas; The activation processing of limestone desulfurizer is carried out in activation equipment, contains the mixed slurry of lime stone and water in the equipment, and slurry moves under the driving of paddle and mixes; Feed in the lime stone hydration slurry in activation equipment and contain CO
2Gas, the gas of feeding disperses in activation equipment and contacts with lime stone hydration slurry; Desulfurizing agent slurry after the activation is through feed pot or directly enter flue gas desulfurization device, and the desulfurizing agent slurry contacts and remove SO wherein with flue gas in desulphurization plant
2
When with the flue gas after the desulfurization as containing CO
2When gas carried out activation processing to limestone desulfurizer, the flue gas after the desulfurization of discharging from desulphurization plant partly or entirely fed activation equipment, rather than directly or after the dedusting directly through smoke stack emission.
Make the CO that contains of lime stone hydration slurry desulfuration efficiency raising
2Gas comprises the flue gas after the desulfurization, CO in the gas
2Volume content be not less than 5%, do not contain other composition that may produce chemical reaction with lime stone.
The concentration of desulfurizing agent slurry represents that with solvent and solute weight ratio its scope is 15～150 in the activation equipment.
The desulfurizing agent slurry in activation equipment with contain CO
2The average contact time of gas, promptly the mean residence time of desulfurizing agent slurry in activation equipment is no less than 0.5 hour.
Temperature during the activation of desulfurizing agent slurry is 20 ℃～80 ℃.
Advantage of the present invention and effect are:
1. under the identical desulfurization condition (equipment and operating condition), adopt the limestone desulfurizer slurry after the technology of the present invention is handled, its smoke desulfurization efficiency and calcium transformation ratio significantly improve, and have improved the utilization rate of limestone desulfurizer, reduce the cost of flue gas desulfurization.
2. technology of the present invention, the material that does not change limestone desulfurizer desulfurization afterproduct is formed, and does not reduce the purity of gypsum product, does not therefore influence the utilization again of desulfurization product.
3. technology of the present invention, do not need to change during application existing operation lime (stone)---gypsum method flue gas desulfurization technique flow process and equipment are easy to practical application.And (main component is Ca (OH) to substitute higher lime (main component is CaO) of price and calcium hydroxide through the lime stone of activation processing
2) desulfurizing agent, can save the process cost of flue gas desulfurization.
4. technology of the present invention can utilize flue gas after the desulfurization as containing CO
2Gas, gas source enriches, take conveniently, and simple in structure, the processing ease of employed process equipment, application cost is low.
Description of drawings
Accompanying drawing of the present invention is the technology schematic flow sheet when being used for flue gas desulfurization industry.
Title about two equipment among the figure is described as follows:
(1) activated bath that is to say activation equipment in the bright book among the figure;
(2) desulfurization reactor that is to say desulphurization plant in the bright book among the figure, as: absorption tower etc.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Make the CO that contains of lime stone hydration slurry desulfuration efficiency raising
2Gas comprises the flue gas after the desulfurization.When the flue gas after utilizing desulfurization carried out activation processing to limestone desulfurizer, its technological process as shown in drawings.Limestone desulfurizer accepted to contain CO before entering desulphurization plant
2The activation processing of gas.Alleged activation processing is meant the processing through this process, and lime stone is to SO
2Chemical reactivity improve, and then its utilization rate in flue gas desulfurization is improved.
The activation processing of limestone desulfurizer is carried out in activation equipment (activated bath), contains the mixed slurry of lime stone and water in the activation equipment, and slurry moves under the driving of paddle and mixes.
Feed in the lime stone hydration slurry in activation equipment and contain CO
2Gas, the gas of feeding disperses in activation equipment and contacts with lime stone hydration slurry, realizes the activation to limestone desulfurizer.
Desulfurizing agent slurry after the activation is through feed pot or directly enter flue gas desulfurization device (desulfurization reactor), and the desulfurizing agent slurry contacts and remove SO wherein with flue gas in desulphurization plant
2
(1) makes the CO that contains of limestone desulfurizer activation
2Gas comprises the flue gas after the desulfurization, CO in the gas
2Volume content be not less than 5%, not containing may to produce other composition or its concentration of chemical reaction very low with lime stone.
(2) concentration of activation equipment sodalime stone desulfurizing agent slurry is represented with solvent and solute weight ratio, and its scope is 15～150.
(3) the desulfurizing agent slurry in activation equipment with contain CO
2The average contact time of gas, i.e. the mean residence time of desulfurizing agent slurry in activation equipment, or be called average soak time and be no less than 0.5 hour.
(4) in the activation equipment, the limestone desulfurizer slurry activates under 20 ℃～80 ℃.
Embodiment one
To CO in the gas of limestone desulfurizer activation
2Volume content be 5%～15%., the solvent and solute weight ratio of desulfurizing agent slurry is 15～75 in the activation equipment, and the desulfurizing agent soak time is 5 hours, and activation temperature is 20 ℃.
Embodiment two
To CO in the gas of limestone desulfurizer activation
2Volume content be 15%～50%, the solvent and solute weight ratio of desulfurizing agent slurry is 75～150 in the activation equipment, the desulfurizing agent soak time is 2.5 hours, activation temperature is 80 ℃.
Embodiment three
To CO in the gas of limestone desulfurizer activation
2Volume content be 50%～80%, the solvent and solute weight ratio of desulfurizing agent slurry is 75～150 in the activation equipment, the desulfurizing agent soak time is 0.5 hour, activation temperature is 80 ℃.
Embodiment four
Embodiment four and embodiment one are basic identical, and difference is that the gas to the limestone desulfurizer activation is the flue gas after the desulfurization, and activation temperature is 50 ℃.
Claims (5)
1. improve the technology of limestone desulfurizer utilization rate in flue gas desulfurization, it is characterized in that this technical process is: limestone desulfurizer accepted to contain CO before entering desulphurization plant
2The activation processing of gas; The activation processing of limestone desulfurizer is carried out in activation equipment, contains the mixed slurry of lime stone and water in the equipment, and slurry moves under the driving of paddle and mixes; Feed in the lime stone hydration slurry in activation equipment and contain CO
2Gas, the gas of feeding disperses in activation equipment and contacts with lime stone hydration slurry; Desulfurizing agent slurry after the activation is through feed pot or directly enter flue gas desulfurization device, and the desulfurizing agent slurry contacts and remove SO wherein with flue gas in desulphurization plant
2When with the flue gas after the desulfurization as containing CO
2When gas carried out activation processing to limestone desulfurizer, the flue gas after the desulfurization of discharging from desulphurization plant partly or entirely fed activation equipment, rather than directly or after the dedusting directly through smoke stack emission.
2. the technology of raising limestone desulfurizer as claimed in claim 1 utilization rate in flue gas desulfurization is characterized in that making the CO that contains that lime stone hydration slurry desulfuration efficiency improves
2Gas comprises the flue gas after the desulfurization, CO in the gas
2Volume content be not less than 5%, do not contain other composition that may produce chemical reaction with lime stone.
3. the technology of raising limestone desulfurizer as claimed in claim 1 utilization rate in flue gas desulfurization is characterized in that the concentration of desulfurizing agent slurry in the activation equipment represents that with solvent and solute weight ratio its scope is 15～150.
4. the technology of raising limestone desulfurizer as claimed in claim 1 utilization rate in flue gas desulfurization, it is characterized in that the desulfurizing agent slurry in activation equipment with contain CO
2The average contact time of gas, promptly the mean residence time of desulfurizing agent slurry in activation equipment is no less than 0.5 hour.
5. according to claim 1, improve the technology of limestone desulfurizer utilization rate in flue gas desulfurization, the temperature when it is characterized in that the activation of desulfurizing agent slurry is 20 ℃～80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046202 CN1701837A (en) | 2005-04-08 | 2005-04-08 | Technology for improving utilization rate of limestone desulfurizer in flue gas desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046202 CN1701837A (en) | 2005-04-08 | 2005-04-08 | Technology for improving utilization rate of limestone desulfurizer in flue gas desulfurization |
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| CN1701837A true CN1701837A (en) | 2005-11-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493679C (en) * | 2007-06-07 | 2009-06-03 | 中电投远达环保工程有限公司 | Method of controlling fume speed inside desulfurizing absorption tower |
| CN104437067A (en) * | 2014-11-03 | 2015-03-25 | 武汉光谷环保科技股份有限公司 | Method for strengthening activity of limestone-gypsum wet-method flue gas desulfurization slurry |
| CN112221339A (en) * | 2019-07-15 | 2021-01-15 | 宝山钢铁股份有限公司 | Wet desulphurization device and method for dry desulphurization ash |
-
2005
- 2005-04-08 CN CN 200510046202 patent/CN1701837A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493679C (en) * | 2007-06-07 | 2009-06-03 | 中电投远达环保工程有限公司 | Method of controlling fume speed inside desulfurizing absorption tower |
| CN104437067A (en) * | 2014-11-03 | 2015-03-25 | 武汉光谷环保科技股份有限公司 | Method for strengthening activity of limestone-gypsum wet-method flue gas desulfurization slurry |
| CN112221339A (en) * | 2019-07-15 | 2021-01-15 | 宝山钢铁股份有限公司 | Wet desulphurization device and method for dry desulphurization ash |
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