CN217392016U - Circulating fluidized bed desulphurization unit with injection device - Google Patents
Circulating fluidized bed desulphurization unit with injection device Download PDFInfo
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- CN217392016U CN217392016U CN202220000074.5U CN202220000074U CN217392016U CN 217392016 U CN217392016 U CN 217392016U CN 202220000074 U CN202220000074 U CN 202220000074U CN 217392016 U CN217392016 U CN 217392016U
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Abstract
The utility model discloses a circulating fluidized bed desulphurization unit of area induction apparatus belongs to gas cleaning technical field. The device comprises an absorption tower (1), a cyclone separator (2), a circulating ash hopper (3), a primary circulating ash conveying pipe (4) and a secondary circulating ash conveying pipe (5). The absorption agent, the circulating ash and the circulating ash air conveying air form an injection effect when entering the absorption tower, so that the mixing effect of gas-liquid-solid three-phase flow can be obviously enhanced, the existence time of liquid drops can be prolonged, and the desulfurization efficiency can be improved.
Description
Technical Field
The utility model relates to a flue gas purification technical field, specifically, the utility model relates to a take injection device's circulating fluidized bed desulphurization unit.
Background
At present, the flue gas desulfurization process can be basically divided into three types: wet, dry and semi-dry processes. The desulfurizer of the wet desulphurization process adopts a slurry form, the desulphurization byproduct has high water content, and the byproduct with low water content can be obtained only after concentration and dehydration; dry desulfurization adopts a dry desulfurizer, and desulfurization byproducts are dry solids; the semi-dry method is between the wet method and the dry method, the desulfurizing agent exists in the form of atomized or humidified small particles in the desulfurizing process, and the byproduct is solid in a dry state. The flue gas circulating fluidized bed desulfurization process belongs to a semi-dry desulfurization technology, and compared with a wet desulfurization process, the flue gas circulating fluidized bed desulfurization process has the characteristics of low investment and operation cost, less system equipment, small occupied area, no desulfurization wastewater discharge and the like, and has a good application prospect.
In the flue gas circulating fluidized bed desulfurization process, absorbent liquid drops, desulfurization circulating ash, flue gas and the like simultaneously interact in an absorption tower, and the mixing effect of gas-liquid-solid three-phase flow and the existence time of the liquid drops have obvious influence on the desulfurization efficiency.
Disclosure of Invention
The utility model provides a take injection apparatus's circulating fluidized bed desulphurization unit makes absorbent, circulation ash defeated air supply form the injection effect when getting into the absorption tower, can show the mixed effect and the extension liquid drop live time that strengthen the solid three-phase flow of gas-liquid, is favorable to improving desulfurization efficiency.
The utility model provides a circulating fluidized bed desulphurization device with an injection device, which is characterized by comprising an absorption tower (1), a cyclone separator (2), a circulating ash hopper (3), a primary circulating ash conveying pipe (4) and a secondary circulating ash conveying pipe (5); the absorption tower (1) comprises an inlet section (10), a lower reaction section (11) and an upper reaction section (12); the inlet section (10) is provided with a discharge port (100) and a flue gas inlet (101); the lower reaction section (11) is provided with a primary liquid nozzle (110) and a primary injection port (111); the upper reaction section (12) is provided with a secondary liquid nozzle (120), a secondary injection port (121) and a smoke outlet (122).
The utility model provides a circulating fluidized bed desulphurization unit with an injection device, which is characterized in that a cyclone separator (2) is connected with a flue gas outlet (122) of an absorption tower (1) and a circulating ash bucket (3); the circulating ash bucket (3) is connected with the primary circulating ash conveying pipe (4) through a primary ash discharging valve (31), is also connected with the secondary circulating ash conveying pipe (5) through a secondary ash discharging valve (32), and is provided with a circulating ash discharging valve (30).
The utility model provides a circulating fluidized bed desulphurization device with an injection device, which is characterized in that a primary circulating ash conveying pipe (4) is connected with a primary injection port (111) and is also connected with a primary conveying air flow regulating valve (40); and the secondary circulating ash conveying pipe (5) is connected with the secondary injection port (121) and is also connected with the secondary conveying air flow regulating valve (50).
The utility model provides a circulating fluidized bed desulphurization device with an injection device, which is characterized in that flue gas containing sulfur dioxide enters an inlet section (10) of an absorption tower (1) through a flue gas inlet (101); the absorbent is pretreated to form slurry and enters the lower reaction section (11) together with water through a primary liquid nozzle (110) or enters the upper reaction section (12) through a secondary liquid nozzle (120); solid particles from the circulating ash hopper (3) are carried by conveying air in the primary circulating ash conveying pipe (4) and enter the lower reaction section (11) through the primary injection port (111), or are carried by conveying air in the secondary circulating ash conveying pipe (5) and enter the upper reaction section (12) through the secondary injection port (121).
The utility model provides a take injection apparatus's circulating fluidized bed desulphurization unit, the absorbent thick liquid forms the atomizing liquid drop and attaches to the solid particle surface after getting into absorption tower (1), and react with the sulfur dioxide in the flue gas under the effect of water, the desulfurization accessory substance of formation is solid-state, flue gas outlet (122) through absorption tower (1) together with flue gas and the complete absorbent of unreacted get into cyclone (2), wherein the great solid particle of granularity is mended and gets into circulation ash bucket (3), the less solid particle of granularity gets into low reaches dust collecting equipment along with flue gas eduction gear.
The utility model provides a take injection apparatus's circulating fluidized bed desulphurization unit, the pressure of absorbent thick liquid is showing and is being greater than circulation ash and carry wind, can form the injection effect when circulation ash gets into the absorption tower, is showing the mixed effect that strengthens gas-liquid solid three-phase fluid to be favorable to improving desulfurization efficiency.
The utility model provides a take injection device's circulating fluidized bed desulphurization unit, the solid three-phase fluid of gas-liquid is under injection effect, and is regional at the inside local high pressure that forms of absorption tower, and the regional existence of high pressure will form certain inhibitory action to the liquid drop evaporation, is favorable to prolonging the liquid drop dwell time, is favorable to improving desulfurization efficiency.
Based on the above utility model, the utility model has the advantages of:
1. the absorbent slurry, the circulating ash and the circulating ash conveying air form an injection effect when entering the absorption tower, so that the mixing effect of gas-liquid-solid three-phase fluid can be obviously enhanced, and the desulfurization efficiency is favorably improved.
2. The gas-liquid-solid three-phase fluid forms a local high-pressure area in the absorption tower, and the existence of the high-pressure area can form a certain inhibition effect on the evaporation of liquid drops, thereby being beneficial to prolonging the existence time of the liquid drops and improving the desulfurization efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a circulating fluidized bed desulfurization device with an injection device provided by the utility model.
The system comprises an absorption tower 1, an inlet section 10, a discharge port 100, a flue gas inlet 101, a lower reaction section 11, a primary liquid nozzle 110, a primary injection port 111, an upper reaction section 12, a secondary liquid nozzle 120, a secondary injection port 121, a flue gas outlet 122, a cyclone separator 2, a circulating ash hopper 3, a circulating ash discharge valve 30, a primary ash discharge valve 31, a secondary ash discharge valve 32, a primary circulating ash conveying pipe 4, a primary conveying air flow regulating valve 40, a secondary circulating ash conveying pipe 5 and a secondary conveying air flow regulating valve 50.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Example 1
The rated flow rate of the flue gas circulating fluidized bed desulfurization device shown in the figure 1 is 350000 Nm 3 H ofDesulfurizing the flue gas (the temperature of the flue gas is 120 ℃, the water content is 10 percent), and the design value of the content of the imported sulfur dioxide is 1800 mg/Nm 3 (dry state), the desired export sulphur dioxide content is 35 mg/Nm 3 (dry state). Quicklime with the calcium oxide content of 90% is used as an absorbent. The temperature of the flue gas at the outlet of the cyclone separator (2) is controlled to be not lower than 70 ℃ by adjusting the spray water flow. Circulating ash is respectively sent to the injection ports of the lower reaction section (11) and the upper reaction section (12) by adjusting the opening degrees of the primary conveying air flow regulating valve (40), the secondary conveying air flow regulating valve (50), the primary ash discharging valve (31), the secondary ash discharging valve (32) and the ash discharging valve (30) in a matching manner. Accordingly, the absorbent slurry and the shower water are fed to the liquid jets of the lower reaction zone (11) and the upper reaction zone (12), respectively. The sulfur dioxide content at the outlet of the cyclone separator (2) meets the emission requirement.
Claims (3)
1. A circulating fluidized bed desulphurization device with an injection device is characterized by comprising an absorption tower (1), a cyclone separator (2), a circulating ash hopper (3), a primary circulating ash conveying pipe (4) and a secondary circulating ash conveying pipe (5); the absorption tower (1) comprises an inlet section (10), a lower reaction section (11) and an upper reaction section (12); the inlet section (10) is provided with a discharge port (100) and a flue gas inlet (101); the lower reaction section (11) is provided with a primary liquid nozzle (110) and a primary injection port (111); the upper reaction section (12) is provided with a secondary liquid nozzle (120), a secondary injection port (121) and a smoke outlet (122).
2. The circulating fluidized bed desulfurization apparatus with an injection device according to claim 1, wherein the primary circulating ash conveying pipe (4) is connected with the primary injection port (111) and further connected with a primary conveying air flow regulating valve (40); and the secondary circulating ash conveying pipe (5) is connected with the secondary injection port (121) and is also connected with the secondary conveying air flow regulating valve (50).
3. The circulating fluidized bed desulfurization apparatus with an injection device according to claim 1, characterized in that the cyclone separator (2) is connected to the flue gas outlet (122) of the absorption tower (1) and the circulating ash hopper (3); the circulating ash bucket (3) is connected with the primary circulating ash conveying pipe (4) through a primary ash discharge valve (31), is also connected with the secondary circulating ash conveying pipe (5) through a secondary ash discharge valve (32), and is provided with a circulating ash discharge valve (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220000074.5U CN217392016U (en) | 2022-01-01 | 2022-01-01 | Circulating fluidized bed desulphurization unit with injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220000074.5U CN217392016U (en) | 2022-01-01 | 2022-01-01 | Circulating fluidized bed desulphurization unit with injection device |
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| CN217392016U true CN217392016U (en) | 2022-09-09 |
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| CN202220000074.5U Active CN217392016U (en) | 2022-01-01 | 2022-01-01 | Circulating fluidized bed desulphurization unit with injection device |
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| CN (1) | CN217392016U (en) |
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