CN201988328U - Flue gas desulfurization device using double alkali method - Google Patents
Flue gas desulfurization device using double alkali method Download PDFInfo
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- CN201988328U CN201988328U CN2011200600553U CN201120060055U CN201988328U CN 201988328 U CN201988328 U CN 201988328U CN 2011200600553 U CN2011200600553 U CN 2011200600553U CN 201120060055 U CN201120060055 U CN 201120060055U CN 201988328 U CN201988328 U CN 201988328U
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Abstract
The utility model relates to a flue gas desulfurization device using a double alkali method. Most of the existing flue gas desulfurization devices using the double alkali method have a problem that an oxidation crystallization of a desulfurization product is incomplete and difficult to be dehydrated, and impurities are too much so as to be difficult to comprehensively use. The flue gas desulfurization device using the double alkali method comprises a desulfurizing tower lime storage bunker and a soda storage bunker, and is characterized in that the desulfurizing tower lime storage bunker is communicated with a lime emulsion tank and a regeneration pond sequentially, the soda storage bunker is communicated with a sodium hydroxide tank and a circulating pond sequentially, the bottom of a desulfurizing tower is communicated with the circulating pond communicated with the regeneration pond through a regeneration pump, the circulating pond is communicated with a spraying layer of the desulfurizing tower, and a sedimentation pond is communicated with the circulating pond and a crystallization pond communicated with the regeneration pond through a swirler. A processing water pipeline communicated with an ager, the lime emulsion tank, the sodium hydroxide tank and the spraying layer of the desulfurizing tower sequentially is arranged on the flue gas desulfurization device using the double alkali method. The flue gas desulfurization device is complete in crystallization, has fewer impurities, is excellent in stability, and guarantees a higher quality of an end product of gypsum.
Description
Technical field
The utility model belongs to the smoke gas treatment field, is specially a kind of dual alkali scrubbing FGD process device.
Background technology
Double alkali method flue gas desulfurization technology is for the shortcoming development that overcomes the easy fouling of desulfurizing tower and obstruction in the limestone-gypsum wet method and come, be characterized in that the soda clear liquid with solubility carries out desulfurization in the tower, tower external application lime slurry is regenerated then, and the sodium base desulfurizer that bears again returns desulfurizing tower again and recycles.Owing to adopt the soda clear liquid to carry out desulfurization in the tower, soda absorbent reactivity height, infiltration rate are fast, the solubility of absorbent and product is big simultaneously, can not cause the supersaturation crystallization, thereby the scale problems that can avoid the limestone-gypsum wet desulphurization often to be run into, be convenient to equipment operation and maintenance, improved reliability of system operation.
But present double alkali method desulfurizing device exists the desulfurization product oxidizing and crystallizing not exclusively to be difficult to dehydration mostly, and impurity too much is difficult to comprehensive utilization.The impurity such as sandstone particle that contain in the lime also can influence the stability of its operation in the system equipment bottom deposit simultaneously.
The utility model content
The utility model provides a kind of dual alkali scrubbing FGD process device, and prior art desulfurization product oxidizing and crystallizing not exclusively is difficult to dewater and impurity is too much to overcome, the problem of poor stability.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of dual alkali scrubbing FGD process device, comprise desulfurizing tower, lime warehouse and soda warehouse, its special character is: described lime warehouse is communicated with milk of lime flow container and regenerated reactor successively, described soda warehouse is communicated with NaOH jar and circulatory pool successively, communication loop pond, described desulfurizing tower bottom, circulatory pool is communicated with regenerated reactor by regenerative pump, circulatory pool is communicated with the spraying layer of desulfurizing tower by circulating pump, described sedimentation basin communication loop pond and crystallizing pond, crystallizing pond is communicated with regenerated reactor by cyclone, and described double alkali method desulfurizing device is provided with and leads to ager successively, the milk of lime flow container, the fresh water (FW) pipeline of NaOH jar and desulfurizing tower spraying layer.
Be communicated with ager, sand removing machine successively between above-mentioned lime warehouse and the milk of lime flow container.
Above-mentioned crystallizing pond is connected with oxidation fan, and described circulatory pool is provided with agitator.
Above-mentioned cyclone underflow liquid outlet connects dewaterer.
With respect to prior art, the utility model has the advantages that: in pulping system, pulverized limestone in the lime warehouse is introduced into ager and adds water and carry out slaking, enter the milk of lime flow container again after removing impurity such as sandstone particle in the milk of lime by sand removing machine then, effectively reduced the impurity content in the milk of lime, guaranteed that end product gypsum quality is higher; Stock tank is not established in the desulfurizing tower bottom, tower prime cement liquid is all delivered to the outer circulatory pool of tower, the spraying layer of delivering in the tower by circulating pump is recycling then, doctor solution after the regeneration and soda replenish liquid and also enter circulatory pool, utilize circulatory pool that the desulphurization circulating section rationally is communicated with the regeneration cycle section, effectively avoid calcium ion to enter desulfurizing tower; Adopt oxidation fan that gypsum slurries in the crystallizing pond is carried out blast aeration, forced oxidation guarantees that end product is high-quality gypsum.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Wherein: 1-desulfurizing tower; 2-circulatory pool; 3-regenerated reactor; 4-sedimentation basin; 5-crystallizing pond; 6-cyclone; 7-dewaterer; 8-soda warehouse; 9-NaOH jar; 10-lime warehouse; 11-ager; 12-sand removing machine; 13-milk of lime flow container; 14-oxidation fan; 15-agitator; 16-circulating pump; 17-regenerative pump.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is described further.
A kind of double alkali method desulfurizing device, comprise desulfurizing tower 1, lime warehouse 10 and soda warehouse 8, its special character is: described lime warehouse 10 is communicated with milk of lime flow container 13 and regenerated reactor 3 successively, described soda warehouse 8 is communicated with NaOH jar 9 and circulatory pool 2 successively, communication loop pond, described desulfurizing tower 1 bottom 2, circulatory pool 2 is communicated with regenerated reactor 3 by regenerative pump 17, circulatory pool 2 is communicated with the spraying layer of desulfurizing tower 1 by circulating pump 16, described sedimentation basin 4 communication loop ponds 2 and crystallizing pond 5, crystallizing pond 5 is communicated with regenerated reactor 3 by cyclone 6, and described double alkali method desulfurizing device is provided with and leads to ager 11 successively, milk of lime flow container 13, the fresh water (FW) pipeline of NaOH jar 9 and desulfurizing tower 1 spraying layer.Be communicated with ager 11, sand removing machine 12 between described lime warehouse 10 and the milk of lime flow container 13 successively.Described crystallizing pond 5 is connected with oxidation fan 14, and described circulatory pool 2 is provided with agitator 15.Described cyclone 6 underflow liquid outlet connects dewaterer 7.
Sweetening process: desulfurizing tower 1 is a void tower, flue gas enters in the desulfurizing tower 1, NaOH counter current contacting with the ejection of top spraying layer, carry out the absorption reaction of sulfur dioxide, remove drop by demister then, discharge desulfurizing tower 1 by the cat head exhanst gas outlet at last, the doctor solution that collect desulfurizing tower 1 bottom is sent to circulatory pool 2, returns spraying layer by circulating pump 16 again and realizes that circulation repeatedly utilizes.Circulatory pool 2 is provided with agitator 15, when doctor solution reaches finite concentration in the circulatory pool 2, with regenerative pump 17 partial desulfurization liquid is delivered to regenerated reactor 3, regenerates with the milk of lime generation displacement reaction that adds.When soda concentration in circulatory pool 2 doctor solutions was low, the alkali lye of NaOH jar 9 can directly add to circulatory pool 2, guaranteed that the doctor solution that absorbs circulation has higher desulphurizing ability.Simultaneously the lime in the lime warehouse 10 is introduced into ager 11 and adds water and carry out slaking, enters milk of lime flow container 13 again after removing wherein impurity such as sandstone particle by sand removing machine 12 again, participates in regenerative responses by the emulsion pumping toward regenerated reactor 3 then.The slurries that react completely in the regenerated reactor 3 are transported to sedimentation basin 4 to be separated, supernatant liquor returns circulatory pool 2, the bottom concentrated slurry enters crystallizing pond 5 again and carries out gypsum crystallization, adopt oxidation fan 14 to carry out forced oxidation simultaneously to crystallizing pond 5 continuous blast aerations, carry out processed by cyclone 6 and dewaterer 7 more at last, obtain desulfurated plaster.Cyclone 6 overflowing liquids return regenerated reactor 3, realize recycling.
Embodiment 1: the SO behind certain boiler dust remover in the flue gas
2Concentration 2000mg/Nm
3Adopt described in the utility model pair of alkaline process to carry out flue gas desulfurization, the purity of used lime is 80%, doctor solution pH is 6 in the control circulatory pool, enter regenerated reactor regeneration by regenerative pump after stopping 8min, the crystallizing pond slurries time of staying is 15h, and the purity of final accessory substance gypsum is greater than 95%, and water content is 9%.
Embodiment 2: the SO in the former flue gas of certain Industrial Stoves
2Concentration 3500mg/Nm
3Adopt described in the utility model pair of alkaline process to carry out flue gas desulfurization, the purity of used lime is 90%, doctor solution pH is 8 in the control circulatory pool, enter regenerated reactor regeneration by regenerative pump after stopping 6min, the crystallizing pond slurries time of staying is 30h, and the purity of final accessory substance gypsum is greater than 97%, and water content is 8%.
Claims (4)
1. dual alkali scrubbing FGD process device, comprise desulfurizing tower (1), lime warehouse (10) and soda warehouse (8), it is characterized in that: described lime warehouse (10) is communicated with milk of lime flow container (13) and regenerated reactor (3) successively, described soda warehouse (8) is communicated with NaOH jar (9) and circulatory pool (2) successively, communication loop pond (2), described desulfurizing tower (1) bottom, circulatory pool (2) is communicated with regenerated reactor (3) by regenerative pump (17), circulatory pool (2) is communicated with the spraying layer of desulfurizing tower (1) by circulating pump (16), described sedimentation basin (4) communication loop pond (2) and crystallizing pond (5), crystallizing pond (5) is communicated with regenerated reactor (3) by cyclone (6), and described double alkali method desulfurizing device is provided with and leads to ager (11) successively, milk of lime flow container (13), the fresh water (FW) pipeline of NaOH jar (9) and desulfurizing tower (1) spraying layer.
2. a kind of dual alkali scrubbing FGD process device according to claim 1 is characterized in that: be communicated with ager (11), sand removing machine (12) between described lime warehouse (10) and the milk of lime flow container (13) successively.
3. a kind of dual alkali scrubbing FGD process device according to claim 1 and 2 is characterized in that: described crystallizing pond (5) is connected with oxidation fan (14), and described circulatory pool (2) is provided with agitator (15).
4. a kind of dual alkali scrubbing FGD process device according to claim 3 is characterized in that: the outlet of described cyclone (6) underflow liquid connects dewaterer (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200600553U CN201988328U (en) | 2011-03-09 | 2011-03-09 | Flue gas desulfurization device using double alkali method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200600553U CN201988328U (en) | 2011-03-09 | 2011-03-09 | Flue gas desulfurization device using double alkali method |
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| CN201988328U true CN201988328U (en) | 2011-09-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166470A (en) * | 2011-03-09 | 2011-08-31 | 西安西矿环保科技有限公司 | Dual-alkali smoke desulfurization device and desulfurization method thereof |
| CN102728205A (en) * | 2012-07-20 | 2012-10-17 | 成都德美工程技术有限公司 | Method for flue gas desulfurization by sodium-calcium double alkali method |
| CN106512678A (en) * | 2016-11-28 | 2017-03-22 | 西华大学 | Flue gas desulphurization and decarburization device and flue gas desulphurization and decarburization method |
| CN111644061A (en) * | 2020-06-15 | 2020-09-11 | 碧水蓝天环境工程有限公司 | Wet-type dual-alkali desulfurization dust collector |
-
2011
- 2011-03-09 CN CN2011200600553U patent/CN201988328U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166470A (en) * | 2011-03-09 | 2011-08-31 | 西安西矿环保科技有限公司 | Dual-alkali smoke desulfurization device and desulfurization method thereof |
| CN102728205A (en) * | 2012-07-20 | 2012-10-17 | 成都德美工程技术有限公司 | Method for flue gas desulfurization by sodium-calcium double alkali method |
| CN106512678A (en) * | 2016-11-28 | 2017-03-22 | 西华大学 | Flue gas desulphurization and decarburization device and flue gas desulphurization and decarburization method |
| CN111644061A (en) * | 2020-06-15 | 2020-09-11 | 碧水蓝天环境工程有限公司 | Wet-type dual-alkali desulfurization dust collector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20170309 |
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| CF01 | Termination of patent right due to non-payment of annual fee |