CN214552443U - Lime kiln flue gas dust removal SOx/NOx control clean system - Google Patents
Lime kiln flue gas dust removal SOx/NOx control clean system Download PDFInfo
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- CN214552443U CN214552443U CN202023274752.7U CN202023274752U CN214552443U CN 214552443 U CN214552443 U CN 214552443U CN 202023274752 U CN202023274752 U CN 202023274752U CN 214552443 U CN214552443 U CN 214552443U
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- flue gas
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- desulfurization
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The utility model relates to a lime kiln flue gas dedusting, desulfurizing, denitrifying and purifying system, which comprises a cyclone desulfurizing tower, a deduster, a denitrifying reactor, an induced draft fan, an ammonia diluting fan, a mixer and a chimney; the cyclone desulfurizing tower has a cyclone structure and multiple atomizing spray guns on the top; the flue gas inlet of the cyclone desulfurization tower is connected with the flue gas outlet of the lime kiln, and the flue gas outlet of the cyclone desulfurization tower is connected with the dust-containing flue gas inlet of the dust remover; a flue gas outlet of the dust remover is sequentially connected with a denitration reactor, an induced draft fan and a chimney; the outlet of the induced draft fan is additionally connected with an ammonia inlet of the denitration reactor, an ammonia diluting fan and a mixer are arranged on the ammonia inlet pipeline, and the mixer is additionally connected with an external ammonia supply pipeline. The utility model discloses a with the flue gas of lime kiln through dust removal, SOx/NOx control purification treatment back target of discharge to reach standard, discharge the flue gas and can reach national industrial furnace pollutant emission standard, effectively reduced the atmosphere pollution, be favorable to realizing the clean production of fire-resistant lime trade.
Description
Technical Field
The utility model relates to a flue gas purification technical field especially relates to a lime kiln flue gas dust removal SOx/NOx control clean system.
Background
The history of calcining quicklime in China is long, a large amount of flue gas to be treated is generated in the lime burning process, the temperature of the flue gas is about 180 ℃, the main components of the flue gas are dust, acid gas, NOx and other harmful gases, and CaO/Ca (OH) in the dust2Although the content is higher, the actual production operation process proves that only CaO/Ca (OH) in the flue gas passes through2The effect of removing acid gas is not obvious, and SO is generated in the process of discharging flue gas2And the acidic gas still exceeds the standard, thereby bringing serious harm to the environment.
Meanwhile, with the increasingly strict national emission standard of smoke dust in the industrial field, the industrial enterprises realize cleaner production at an increasingly rapid pace, and the flue gas dedusting, desulfurization and denitration process in the lime industrial field needs to be improved urgently, so that the development of an efficient lime kiln flue gas dedusting, desulfurization, denitration and purification process is imperative.
Disclosure of Invention
The utility model provides a lime kiln flue gas dust removal SOx/NOx control clean system has realized the target of discharge to reach standard after dust removal, SOx/NOx control purification treatment with the flue gas of lime kiln, and the emission flue gas can reach national industrial furnace pollutant emission standard, has effectively reduced the atmosphere pollution, is favorable to realizing the clean production of fire-resistant lime trade.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a lime kiln flue gas dedusting, desulfurization, denitrification and purification system comprises a cyclone desulfurization tower, a deduster, a denitrification reactor, an induced draft fan, an ammonia dilution fan, a mixer and a chimney; the cyclone desulfurization tower is characterized in that a cyclone structure is adopted as a body, a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the upper part of the cyclone desulfurization tower along the tangential direction, a plurality of atomizing spray guns are arranged at the top of the cyclone desulfurization tower, and an ash outlet is arranged at the bottom of the cyclone desulfurization tower; the flue gas inlet of the cyclone desulfurization tower is connected with the flue gas outlet of the lime kiln, and the flue gas outlet of the cyclone desulfurization tower is connected with the dust-containing flue gas inlet of the dust remover through a flue gas pipeline I; a flue gas outlet of the dust remover is sequentially connected with the denitration reactor, the induced draft fan and the chimney through a flue gas pipeline II; the outlet of the induced draft fan is connected with an ammonia inlet of the denitration reactor through an ammonia inlet pipeline, the ammonia inlet pipeline is sequentially provided with an ammonia diluting fan and a mixer along the air flow direction, and the mixer is additionally connected with an external ammonia supply pipeline.
The first flue gas pipeline is connected with the atmosphere through a bypass pipeline, and an electric bypass valve is arranged on the bypass pipeline.
The plurality of atomizing spray guns are uniformly arranged along the circumferential direction of the cyclone desulfurization tower, and each atomizing spray gun is arranged along the tangential direction of the cyclone desulfurization tower.
The inner wall of the cyclone desulfurizing tower body is made of anticorrosive and wear-resistant materials or is provided with an anticorrosive and wear-resistant coating.
The induced draft fan is a variable frequency fan.
The denitration reactor is a low-temperature denitration reactor.
The mixer is a gas mixer with a grating arranged inside.
The dust remover is a bag type dust remover.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the cyclone desulfurization tower adopts a structure that a cyclone is matched with an atomization spray gun at the top, so that the integration of dust removal and desulfurization is realized, dust in flue gas is purified for one time, the load of a subsequent bag type dust collector is reduced, and the service life of the bag type dust collector is prolonged;
2) the inner wall of the cyclone desulfurizing tower adopts an anti-corrosion and anti-abrasion structure, so that the cyclone desulfurizing tower can effectively resist acid corrosion and long-time dust washing;
3) the denitration reactor adopts low-temperature catalytic denitration, so that high-efficiency denitration of low-temperature flue gas can be realized;
4) the induced draft fan adopts a variable frequency fan, can be adjusted according to the actual working condition of the lime kiln, and effectively reduces energy consumption and operation cost;
5) the mixer adopts a grid type structure inside, so that ammonia gas and flue gas can be fully mixed;
6) the ammonia diluting fan takes air from the outlet of the induced draft fan to mix with ammonia, so that the mixed ammonia entering the denitration reactor is basically not cooled, and the denitration efficiency is ensured;
7) through the electric bypass valve arranged on the first flue gas conveying pipeline, the regulation of overhigh flue gas temperature can be realized, and the safe operation of subsequent equipment is ensured.
Drawings
FIG. 1 is a structural schematic diagram of a lime kiln flue gas dust removal, desulfurization and denitrification purification system.
In the figure: 1. lime kiln 2, cyclone desulfurization tower 3, dust remover 4, denitration reactor 5, draught fan 6, chimney 7, mixer 8, ammonia dilution fan 9, flue gas pipeline I10, flue gas pipeline II 11, ammonia inlet pipeline 12 and electric bypass valve
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the lime kiln flue gas dedusting, desulfurizing, denitrifying and purifying system of the utility model comprises a cyclone desulfurizing tower 2, a dust remover 3, a denitrifying reactor 4, a draught fan 5, an ammonia diluting fan 8, a mixer 7 and a chimney 6; the cyclone desulfurization tower 2 is characterized in that a cyclone structure is adopted as a body, a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the upper part of the cyclone desulfurization tower 2 along the tangential direction, a plurality of atomizing spray guns are arranged on the top of the cyclone desulfurization tower 2, and an ash outlet is arranged at the bottom of the cyclone desulfurization tower; the flue gas inlet of the cyclone desulfurization tower 2 is connected with the flue gas outlet of the lime kiln 1, and the flue gas outlet of the cyclone desulfurization tower 2 is connected with the dust-containing flue gas inlet of the dust remover 3 through a flue gas pipeline I9; a flue gas outlet of the dust remover 3 is sequentially connected with a denitration reactor 4, an induced draft fan 5 and a chimney 6 through a flue gas pipeline II 10; 5 exports of draught fan connect the ammonia import of denitration reactor 4 through ammonia inlet pipe 11 in addition, and ammonia inlet pipe 11 is gone up and is equipped with ammonia dilution fan 8, blender 7 in proper order along the air current direction, and the blender is connected the outer ammonia pipeline that supplies in addition.
The first flue gas pipeline 9 is connected with the atmosphere through a bypass pipeline, and an electric bypass valve 12 is arranged on the bypass pipeline.
The plurality of atomizing spray guns are uniformly arranged along the circumferential direction of the cyclone desulfurization tower 2, and each atomizing spray gun is arranged along the tangential direction of the cyclone desulfurization tower 2.
The inner wall of the cyclone desulfurizing tower 2 is made of anticorrosive and wear-resistant material or is provided with an anticorrosive and wear-resistant coating.
The draught fan 5 is a variable frequency fan.
The denitration reactor 4 is a low-temperature denitration reactor.
The mixer 7 is a gas mixer with a grating arranged inside.
The dust remover 3 is a bag type dust remover.
Lime kiln flue gas dust removal SOx/NOx control clean system's process as follows:
1) desulfurization and dust removal: the flue gas generated by the lime kiln 1 enters the cyclone desulfurizer 2 along the tangential direction and comprises CaO or Ca (OH) under the action of centrifugal force2The coarse dust particles are collected, the water sprayed from the atomizing spray gun dissolves CaO or Ca (OH)2Generating alkali liquor after the particles are granulated, and removing acid gases in the flue gas through a neutralization reaction;
2) dust removal: the desulfurized flue gas enters a dust remover 3 to capture fine particle dust in the flue gas;
3) denitration: the flue gas after desulfurization and dust removal enters a denitration reactor 4, NOx in the flue gas is removed through denitration reaction with ammonia gas from a mixer 7 in the denitration reactor 4, and purified flue gas reaching the standard is discharged out of a chimney 6 through an induced draft fan 5;
4) ammonia gas dilution: under the suction effect of the ammonia diluting fan 8, the clean flue gas at the outlet of the induced draft fan 5 is mixed with the externally supplied ammonia in the mixer 7, and then is supplied to the denitration reactor 4 as a denitration agent.
A dust removal, desulfurization, denitrification and purification process for lime kiln flue gas, when the content of acid gas in the flue gas at the outlet of a lime kiln 1 exceeds a set value, an atomizing spray gun in a cyclone desulfurization tower 2 adopts alkali liquor to replace water for spraying; when the temperature of the flue gas at the upstream of the dust remover 3 is higher than a set value, the electric bypass valve 12 is opened to mix cold air.
According to the different requirements of flue gas treatment, among a limekiln flue gas dust removal SOx/NOx control clean system, cyclone desulfurizing tower 2, dust remover 3, denitration reactor 4 (including ammonia dilution fan 8 and blender 7) can the simultaneous use, also can the exclusive use or two liang of combined use.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. A lime kiln flue gas dedusting, desulfurization, denitrification and purification system is characterized by comprising a cyclone desulfurization tower, a deduster, a denitrification reactor, an induced draft fan, an ammonia diluting fan, a mixer and a chimney; the cyclone desulfurization tower is characterized in that a cyclone structure is adopted as a body, a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the upper part of the cyclone desulfurization tower along the tangential direction, a plurality of atomizing spray guns are arranged at the top of the cyclone desulfurization tower, and an ash outlet is arranged at the bottom of the cyclone desulfurization tower; the flue gas inlet of the cyclone desulfurization tower is connected with the flue gas outlet of the lime kiln, and the flue gas outlet of the cyclone desulfurization tower is connected with the dust-containing flue gas inlet of the dust remover through a flue gas pipeline I; a flue gas outlet of the dust remover is sequentially connected with the denitration reactor, the induced draft fan and the chimney through a flue gas pipeline II; the outlet of the induced draft fan is connected with an ammonia inlet of the denitration reactor through an ammonia inlet pipeline, the ammonia inlet pipeline is sequentially provided with an ammonia diluting fan and a mixer along the air flow direction, and the mixer is additionally connected with an external ammonia supply pipeline.
2. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the flue gas duct is additionally connected with the atmosphere through a bypass duct, and an electric bypass valve is arranged on the bypass duct.
3. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the plurality of atomizing spray guns are uniformly arranged along the circumferential direction of the cyclone desulfurization tower, and each atomizing spray gun is arranged along the tangential direction of the cyclone desulfurization tower.
4. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the inner wall of the cyclone desulfurization tower body is made of an anti-corrosion and anti-wear material or is provided with an anti-corrosion and anti-wear coating.
5. The lime kiln flue gas dedusting, desulfurization and denitrification purification system as recited in claim 1, wherein the induced draft fan is a variable frequency fan.
6. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the denitrification reactor is a low temperature denitrification reactor.
7. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the mixer is a gas mixer with a grille inside.
8. The lime kiln flue gas dedusting, desulfurization, denitrification and purification system as recited in claim 1, wherein the dust collector is a bag type dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023274752.7U CN214552443U (en) | 2020-12-30 | 2020-12-30 | Lime kiln flue gas dust removal SOx/NOx control clean system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023274752.7U CN214552443U (en) | 2020-12-30 | 2020-12-30 | Lime kiln flue gas dust removal SOx/NOx control clean system |
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| Publication Number | Publication Date |
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| CN214552443U true CN214552443U (en) | 2021-11-02 |
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| CN202023274752.7U Active CN214552443U (en) | 2020-12-30 | 2020-12-30 | Lime kiln flue gas dust removal SOx/NOx control clean system |
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