CN214287556U - Calcium hydroxide dry flue gas desulfurization system - Google Patents
Calcium hydroxide dry flue gas desulfurization system Download PDFInfo
- Publication number
- CN214287556U CN214287556U CN202022710894.7U CN202022710894U CN214287556U CN 214287556 U CN214287556 U CN 214287556U CN 202022710894 U CN202022710894 U CN 202022710894U CN 214287556 U CN214287556 U CN 214287556U
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- China
- Prior art keywords
- inlet
- reaction tower
- desulfurization
- flue gas
- pipeline
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 58
- 230000023556 desulfurization Effects 0.000 title claims abstract description 58
- 239000003546 flue gas Substances 0.000 title claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 27
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 26
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 12
- 239000000571 coke Substances 0.000 claims description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 abstract description 19
- 239000006227 byproduct Substances 0.000 abstract description 8
- 235000019504 cigarettes Nutrition 0.000 abstract description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 3
- 239000011575 calcium Substances 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Abstract
The utility model discloses a calcium hydrate dry flue gas desulfurization system, including desulfurization reaction tower and sack cleaner, wherein the desulfurization reaction tower divide into the triplex, and the desulfurization reaction tower lower part is the ash bin, the middle part is the choke, upper portion is the expansion part, choke one side is equipped with into the mouth, it communicates with each other with the choke is inside to advance the mouth inner, it is connected with into the cigarette pipeline to advance the mouth outer end, be equipped with the draught fan on advancing the cigarette pipeline, and advance and be equipped with compressed gas entry and sodium hydroxide entry on the cigarette pipeline, one side intercommunication feed inlet of advancing the mouth is kept away from to the expansion part, the feed inlet is connected to the ash bin through circulating fan through the feed pipeline, expandThe smoke outlet at the top end of most of the smoke outlets are connected with the smoke inlet at one side of the bag-type dust remover through a smoke outlet pipeline. The utility model uses the powder Ca (OH)2Replacement of NaHCO3Removing SO in flue gas2The operation cost can be greatly reduced while the desulfurization effect is not reduced, and the desulfurization byproduct calcium sulfate can be used as a cement additive or can be used for landfill and road repair treatment, so that secondary pollution is avoided.
Description
Technical Field
The utility model relates to a desulfurization system specifically is a calcium hydrate dry flue gas desulfurization system.
Background
At present, the dry desulphurization of the coke oven flue gas generally adopts a sodium-based dry method, namely NaHCO3Reacts with SO2 in the flue gas to generate Na2SO3、CO2And other byproducts, the process has the advantages that firstly, the desulfurization efficiency is high, secondly, the integration of flue gas desulfurization, dust removal and whitening is realized, and the process has the following two main defects: 1. the operation cost is higher, the flue gas desulfurization cost is higher due to the higher price of NaHCO3, and particularly, the operation cost is higher when the SO2 in the flue gas exceeds 300mg/Nm 3; 2. the desulfurization by-products are not easy to handle because the reaction by-products are mainly Na2SO3、Na2SO3And Na2CO3And the byproducts are not easy to separate and treat, belong to solid wastes and have low utilization value, and the byproducts of most dry desulfurization factories cannot be treated at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a calcium hydrate dry flue gas desulfurization system to solve the problem that prior art exists.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a calcium hydrate dry flue gas desulfurization system, including desulfurization reaction tower and sack cleaner, wherein the desulfurization reaction tower divide into the triplex, and the desulfurization reaction tower lower part is the ash bin, the middle part is the choke, upper portion is the expansion part, choke one side is equipped with into the mouth, it communicates with each other with the choke is inside to advance the mouth inner, it is connected with into the cigarette pipeline to advance the mouth outer end, be equipped with the draught fan on advancing the cigarette pipeline, and it has compressed gas entry and sodium hydroxide entry to advance on the cigarette pipeline, one side intercommunication feed inlet that the mouth was kept away from to the expansion part, the feed inlet is connected to the ash bin through circulating fan through the feed pipeline, the outlet flue on expansion part top passes through the inlet flue that goes out cigarette pipeline connection sack cleaner one side, the outlet flue of sack cleaner opposite side connects the big chimney of coke oven.
According to the calcium hydroxide dry-method flue gas desulfurization system, the inner lining of the desulfurization reaction tower is made of carbon steel, and the inner side of the inner lining is provided with the glass flake coating.
According to the calcium hydroxide dry flue gas desulfurization system, the desulfurization reaction tower has good gas sealing performance.
According to the calcium hydroxide dry-method flue gas desulfurization system, the compressed gas inlet and the sodium hydroxide inlet are both positioned on one side, far away from the desulfurization reaction tower, of the induced draft fan.
According to the calcium hydroxide dry flue gas desulfurization system, the compressed gas inlet is arranged at the bottom of the flue gas inlet pipeline, and the sodium hydroxide inlet is arranged at the top of the flue gas inlet pipeline.
The utility model has the advantages that: the utility model uses the powder Ca (OH)2Replacement of NaHCO3Removing SO in flue gas2The operation cost can be greatly reduced while the desulfurization effect is not reduced, and the desulfurization byproduct calcium sulfate can be used as a cement additive or can be used for landfill and road repair treatment, so that secondary pollution is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. a desulfurization reaction tower; 2. a bag-type dust collector; 3. an ash bin; 4. a throat; 5. an enlarged portion; 6. a smoke inlet; 7. a smoke inlet pipeline; 8. an induced draft fan; 9. a compressed gas inlet; 10. a sodium hydroxide inlet; 11. a feed inlet; 12. a feed line; 13. a circulating fan; 14. a smoke outlet pipeline; 15. a coke oven large chimney.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in figure 1, a calcium hydroxide dry flue gas desulfurization system comprises a desulfurization reaction tower 1 and a bag-type dust remover 2, wherein the desulfurization reaction tower 1 is divided into three parts, the lower part of the desulfurization reaction tower 1 is an ash bin 3, the middle part is a throat 4, the upper part is an enlarged part 5, one side of the throat 4 is provided with a smoke inlet 6, the inner end of the smoke inlet 6 is communicated with the inside of the throat 4, the outer end of the smoke inlet 6 is connected with a smoke inlet pipeline 7, the smoke inlet pipeline 7 is provided with a draught fan 8, and a compressed gas inlet 9 and a sodium hydroxide inlet 10 are arranged on the smoke inlet pipeline 7, one side of the expanded part 5 far away from the smoke inlet 6 is communicated with a feed inlet 11, the feed inlet 11 is connected to the ash bin 3 through a feed pipeline 12 via a circulating fan 13, a smoke outlet at the top end of the expanded part 5 is connected with a smoke inlet at one side of the bag-type dust collector 2 through a smoke outlet pipeline 14, and a smoke outlet at the other side of the bag-type dust collector 2 is connected with a coke oven large chimney 15. When the device is used, the induced draft fan 8 works to promote the coke oven flue gas subjected to denitration and waste heat recovery to enter the throat pipe 4 through the flue gas inlet pipeline 7, the powdery calcium hydroxide enters the throat pipe 4 in the middle of the desulfurization reaction tower 1 along with the coke oven flue gas under the blowing of compressed air, the powdery calcium hydroxide and the flue gas in the throat pipe 4 are subjected to rapid reaction to remove most of SO2 in the flue gas, then the powdery calcium hydroxide enters the expansion part 5 on the upper part of the desulfurization reaction tower 1, the calcium hydroxide and the SO2 in the expansion part 5 continue to react, unreacted calcium hydroxide powder enters the ash bin 3 on the lower part of the desulfurization reaction tower 1, the circulating fan 13 works to promote the calcium hydroxide powder in the ash bin 3 to enter the expansion part 5 on the upper part of the desulfurization reaction tower 1 through the feeding pipeline 12, SO that the effective components of the calcium hydroxide can completely react with the SO2, and the reacted waste ash is periodically discharged and cleaned; the reacted flue gas and part of calcium hydroxide enter the bag-type dust collector 2 through the flue gas outlet pipeline 14, and a small amount of SO in the flue gas in the bag-type dust collector 22Fully reacts with calcium hydroxide to ensure that the desulfurization efficiency reaches more than 90 percent and the particle is controlled to be 15mg/Nm3The qualified flue gas after desulfurization and dust removal is discharged into the atmosphere through a coke oven large chimney 15; the utility model uses the powder Ca (OH)2Replacement of NaHCO3Removing SO in flue gas2Ensure thatThe operation cost can be greatly reduced while the desulfurization effect is not reduced, and a desulfurization byproduct calcium sulfate can be used as a cement additive or can be treated in landfill and road repair, so that secondary pollution can not be caused.
Ca(OH)2Removal of SO2The reaction chemical formula of (1) is as follows:
Ca(OH)2+SO2＝CaSO3·1/2H2O+1/2H2O
2CaSO3·1/2H2O+O2+3H2O＝2CaSO4·2H2O
specifically, the inside lining of the desulfurization reaction tower 1 described in this embodiment is made of carbon steel, and the inside lining is provided with a glass flake coating.
Specifically, the desulfurization reaction tower 1 described in this embodiment has a good gas sealing performance.
Further, the compressed gas inlet 9 and the sodium hydroxide inlet 10 described in this embodiment are both located on one side of the induced draft fan 8 away from the desulfurization reaction tower 1.
Furthermore, the compressed gas inlet 9 of the present embodiment is disposed at the bottom of the smoke inlet pipe 7, and the sodium hydroxide inlet 10 is disposed at the top of the smoke inlet pipe 7.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. A calcium hydroxide dry flue gas desulfurization system is characterized in that: comprises a desulfurization reaction tower (1) and a bag-type dust remover (2), wherein the desulfurization reaction tower (1) is divided into three parts, the lower part of the desulfurization reaction tower (1) is provided with an ash bin (3), the middle part of the desulfurization reaction tower is provided with a throat (4), the upper part of the desulfurization reaction tower is provided with an expanded part (5), one side of the throat (4) is provided with a smoke inlet (6), the inner end of the smoke inlet (6) is communicated with the inside of the throat (4), the outer end of the smoke inlet (6) is connected with a smoke inlet pipeline (7), the smoke inlet pipeline (7) is provided with a draught fan (8), the smoke inlet pipeline (7) is provided with a compressed gas inlet (9) and a sodium hydroxide inlet (10), one side of the expanded part (5) far away from the smoke inlet (6) is communicated with a feed inlet (11), the feed inlet (11) is connected to the ash bin (3) through a circulating fan (13) by virtue of the feed pipeline (12), a smoke outlet at the top end of the expanded part (5) is connected with a smoke inlet on one side of the bag-type dust remover (2) by virtue of a smoke outlet pipeline (14), the smoke outlet on the other side of the bag-type dust collector (2) is connected with a coke oven large chimney (15).
2. The calcium hydroxide dry flue gas desulfurization system according to claim 1, characterized in that: the inner lining of the desulfurization reaction tower (1) is made of carbon steel, and a glass flake coating is arranged on the inner side of the inner lining.
3. The calcium hydroxide dry flue gas desulfurization system according to claim 1, characterized in that: the desulfurization reaction tower (1) has good gas sealing performance.
4. The calcium hydroxide dry flue gas desulfurization system according to claim 1, characterized in that: and the compressed gas inlet (9) and the sodium hydroxide inlet (10) are both positioned on one side of the induced draft fan (8) far away from the desulfurization reaction tower (1).
5. The calcium hydroxide dry flue gas desulfurization system according to claim 1, characterized in that: the compressed gas inlet (9) is arranged at the bottom of the smoke inlet pipeline (7), and the sodium hydroxide inlet (10) is arranged at the top of the smoke inlet pipeline (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710894.7U CN214287556U (en) | 2020-11-21 | 2020-11-21 | Calcium hydroxide dry flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710894.7U CN214287556U (en) | 2020-11-21 | 2020-11-21 | Calcium hydroxide dry flue gas desulfurization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214287556U true CN214287556U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022710894.7U Active CN214287556U (en) | 2020-11-21 | 2020-11-21 | Calcium hydroxide dry flue gas desulfurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214287556U (en) |
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2020
- 2020-11-21 CN CN202022710894.7U patent/CN214287556U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 250, East Building, No. 36 Heping Road, Lixia District, Jinan City, Shandong Province, 250000 Patentee after: Shandong Sunshine Tianrun Chemical Technology Co.,Ltd. Country or region after: China Address before: 271000 No.28 Zhengyangmen street, high tech Zone, Tai'an City, Shandong Province Patentee before: TAIAN SUNSHINE TIANRUN CHEMICAL ENGINEERING CO.,LTD. Country or region before: China |