CN108043204A - A kind of high-calcium powder flue-gas desulphurization system and its application - Google Patents
A kind of high-calcium powder flue-gas desulphurization system and its application Download PDFInfo
- Publication number
- CN108043204A CN108043204A CN201711383727.2A CN201711383727A CN108043204A CN 108043204 A CN108043204 A CN 108043204A CN 201711383727 A CN201711383727 A CN 201711383727A CN 108043204 A CN108043204 A CN 108043204A
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- Prior art keywords
- desulfurizing tower
- calcium
- calcium powder
- desulphurization system
- gas outlet
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- 239000011575 calcium Substances 0.000 title claims abstract description 41
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 39
- 239000003546 flue gas Substances 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 title claims abstract description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 31
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 14
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- WJEIYVAPNMUNIU-UHFFFAOYSA-N [Na].OC(O)=O Chemical compound [Na].OC(O)=O WJEIYVAPNMUNIU-UHFFFAOYSA-N 0.000 claims 1
- 239000000292 calcium oxide Substances 0.000 abstract description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000706 filtrate Substances 0.000 abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 2
- 239000004571 lime Substances 0.000 abstract description 2
- 230000001172 regenerating effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 5
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000010754 BS 2869 Class F Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012066 reaction slurry Substances 0.000 description 1
- 230000009719 regenerative response Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of high-calcium powder flue-gas desulphurization system and its applications, system includes boiler, the deduster being connected with boiler flue gas outlet, the desulfurizing tower being connected with deduster exhanst gas outlet, the reheater being connected with desulfurizing tower exhanst gas outlet, the chimney being connected with reheater exhanst gas outlet, the slurry pool that flyash entrance is connected with the outlet of deduster flyash, the settling tank being connected with slurry pool outlet, configures the stirring pool of soda ash solution, makes absorption SO2The regenerated reactor that high-calcium fly ass filtrate in doctor solution and settling tank afterwards is fully reacted carries out regenerated reactor slurries the sedimentation basin of sedimentation separation, and remaining liq in sedimentation basin is squeezed into the circulating pump of desulfurizing tower.Calcium oxide in high-calcium fly ass for regenerative sulfur binding liquid, is made high-calcium fly ass in power station be fully used, saves power station buying lime cost, improve economic benefit by the present invention.
Description
Technical field
The invention belongs to fume treatment fields, and in particular to a kind of high-calcium powder flue-gas desulphurization system and its application.
Background technology
High-calcium fly ass is a kind of higher flyash of calcium oxide content that thermal power plant gives off, it can be used as cement
Mixing material or concrete admixture have many advantages, such as that water-reducing effect is good, early strength development is fast, but due to its free calcium oxide
Content is high, can cause cement stability is unqualified to even result in concrete expansion cracking, thus not yet obtains good profit so far
With.With the rapid development of power industry, in some areas, the discharge capacity of high-calcium fly ass is considerably beyond low calcium fine coal
Ash, and the too high levels of calcium oxide limit its usability in high-calcium fly ass, are typically only capable in a manner that storage fills
It is handled, causes the waste of a large amount of calcium oxide.
The content of the invention
The purpose of the present invention is exactly to solve the above-mentioned problems and provides a kind of high-calcium powder flue-gas desulphurization system and its answer
With.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high-calcium powder flue-gas desulphurization system, the deduster being connected including boiler, with boiler flue gas outlet and with except
The desulfurizing tower of dirt device exhanst gas outlet connection, the flyash outlet connection slurry pool of the deduster, the slurry pool connection sedimentation
Pond, the settling tank connect regenerated reactor, and the regenerated reactor connects sedimentation basin, and the liquid circulation of the sedimentation basin squeezes into desulfurizing tower,
Desulfurizing tower bottom liquid is passed through regenerated reactor.
Further, the exhanst gas outlet connection reheater of the desulfurizing tower, the exhanst gas outlet connection chimney of the reheater.
Further, the liquid of the sedimentation basin squeezes into desulfurizing tower through circulating pump.
Further, the desulfurizing tower connection stirring pool.
Further, soda ash is added in the stirring pool and slurry pool, increases the pH value of slurries, reduce gelatin phenomenon pair
The loss of calcium, while increase the sodium ion in regenerated reactor, eliminate follow-up sodium ion supplies program.
Further, the soda ash is sodium carbonate.
The above-mentioned desulphurization system is used to handle boiler high-calcium powder flue-gas.
Concrete operating principle of the present invention is that boiler smoke is collected through deduster, and sulfur-containing smoke gas is sent to desulfurizing tower desulfurization, high calcium
Flyash is sent to slurry pool processing.
Soda ash, which is added in, during desulfurizing tower desulfurization, in stirring pool prepares doctor solution Na2CO3It is sent with NaOH to desulfurizing tower, flue gas is de-
It is contacted in sulphur tower with doctor solution, reaction is come into full contact in range of atomization, the desulfurization absorption of flue gas and further dedusting are completed, through de-
Flue gas after sulphur is into reheater and by smoke stack emission.
High-calcium fly ass send to slurry pool handle when, high-calcium fly ass and water are mixed by constant weight volume ratio in slurry pool
Slurry is made into conjunction, while adds in the solubility that suitable soda ash improves calcium oxide, and slurry pool outlet is connected with settling tank, has settled
Outward transport is dried into rear sediment, doctor solution enters regenerated reactor with the high-calcium fly ass filtrate in settling tank and fully reacts, after reaction
Slurries flow into sedimentation basin precipitated, precipitation complete final settling tanks in sediment dry outward transport, remaining liq is beaten through circulating pump
Enter desulfurizing tower to recycle, settling tank lower floor liquid is Ca (OH)2And Na2CO3Solution.
Specifically reaction is in slurry pool：
CaO+H2O→Ca(OH)2 (1)
During the specific reaction of desulfurizing tower is：
Na2CO3+SO2→Na2SO3+CO2 (2)
2NaOH+SO2→Na2SO3+H2O (3)
Na2SO3+SO2+H2O→2NaHSO3 (4)
Specifically reaction is in regenerated reactor：
2NaHSO3+Ca(OH)2→Na2SO3+CaSO3+2H2O (5)
Na2SO3+Ca(OH)2→2NaOH+CaSO3 (6)
The present invention provides a kind of mode for the processing and application of high-calcium fly ass, and compared with prior art, the present invention is excellent
It puts and is：
1st, high-calcium fly ass is fully used, and recycles the calcium oxide in flyash, and removes high calcium fine coal
Calcium oxide in ash；
2nd, high-calcium fly ass is made to be converted into Class F fly ash, improves the availability in its building materials market；
3rd, power station buying lime cost is saved, is increased economic efficiency.
Description of the drawings
Fig. 1 is the structure diagram of inventive desulfurization system；
Fig. 2 is settling tank schematic diagram in the present invention；
In figure：1- boilers；2- dedusters；3- desulfurizing towers；4- reheaters；5- chimneys；6- slurry pools；7- stirring pools；8- is again
Raw pond；9- sedimentation basins；10- circulating pumps；11- settling tanks.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, it is clear that described embodiment is only this
The part of the embodiment of invention, instead of all the embodiments.Based on the embodiment of the present invention, creative work is not being made
Under the premise of other all embodiments for being obtained, belong to the scope of protection of the invention.
The present invention provides a kind of high-calcium powder flue-gas desulphurization system, as shown in Figure 1, going out including boiler 1, with 1 flue gas of boiler
Deduster 2 that mouth is connected, the desulfurizing tower 3 being connected with 2 exhanst gas outlet of deduster, the reheating that is connected with 3 exhanst gas outlet of desulfurizing tower
Slurry pool 6 that device 4, the chimney 5 being connected with 4 exhanst gas outlet of reheater, the outlet of flyash entrance and 2 flyash of deduster are connected,
The settling tank 11 being connected, the stirring pool 7 for configuring soda ash solution are exported with slurry pool 6, make absorption SO2Doctor solution and settling tank afterwards
Regenerated reactor 8 that high-calcium fly ass filtrate in 11 is fully reacted, the sedimentation basin 9 that regenerated reactor slurries are carried out with sedimentation separation will precipitate
Remaining liq squeezes into the circulating pump 10 of desulfurizing tower 3 in pond 9.Boiler smoke reaches slurry pool 6 after the collection of deduster 2, will
High-calcium fly ass is mixed by constant weight volume ratio with water and makes into slurry, while adds in the dissolving that suitable soda ash improves calcium oxide
Degree, high-calcium fly ass slurries are arranged after the sedimentation of settling tank 11 outside sediment, and settling tank schematic diagram is as shown in Figure 2.
Preferred technical solution, soda ash are sent into stirring pool 7 and prepare doctor solution Na2CO3And NaOH solution, flue gas is in desulfurizing tower 3
In contacted with doctor solution, the alkaline desulfurizing agent in flue gas and doctor solution comes into full contact with reaction in range of atomization, completes taking off for flue gas
Sulphur absorbs and further dedusting, the flue gas after desulfurization are discharged into reheater 4 and by chimney 5.
11 lower floor's liquid of settling tank is Ca (OH)2And Na2CO3Solution, 11 liquid of settling tank are sent into regenerated reactor 8.It absorbs
SO2Doctor solution flow into regenerated reactor 8, carry out regenerative response with the high-calcium fly ass filtrate of feeding, the slurries after reaction flow into heavy
Shallow lake pond 9 is precipitated, the sediment then precipitated by manual cleaning this sedimentation basin 9, after waste residue dries outward transport handle, in circulatory pool
Filtrate after regenerating and precipitating filtering is squeezed into desulfurizing tower 3 by circulating pump 10 and is recycled.
It is in slurry pool that high calcium fine coal concrete operating principle is as follows：Grey mixed with enough water makes into slurry, then to carry
The dissolving of high oxidation calcium adds in suitable soda ash, increases the pH value of slurries, reduces loss of the gelatin phenomenon to calcium, increases simultaneously
Sodium ion in regenerated reactor, eliminate follow-up sodium ion supplies program.It fully settles, filtering precipitate, will filter in settling tank
Liquid is sent into regenerated reactor.Doctor solution in regenerated reactor after desulfurization is regenerated with calcium hydroxide reaction, will be precipitated in sedimentation basin
Filter, gained filtrate are sent into desulfurizing tower and carry out desulfurization.
More than content is only the basic explanation under this design, and any equivalent change that technical solution according to the invention is made
It changes, is within the scope of protection of the invention.
Claims (7)
1. a kind of high-calcium powder flue-gas desulphurization system, which is characterized in that be connected including boiler (1), with boiler (1) exhanst gas outlet
Deduster (2) and the desulfurizing tower (3) being connected with deduster (2) exhanst gas outlet, the flyash outlet connection of the deduster (2)
Slurry pool (6), slurry pool (6) the connection settling tank (11), settling tank (11) the connection regenerated reactor (8), the regenerated reactor
(8) sedimentation basin (9) is connected, the liquid circulation of the sedimentation basin (9) squeezes into desulfurizing tower (3), and desulfurizing tower (3) bottom liquid is passed through again
Raw pond (8).
2. a kind of high-calcium powder flue-gas desulphurization system according to claim 1, which is characterized in that the desulfurizing tower (3)
Exhanst gas outlet connection reheater (4), the exhanst gas outlet connection chimney (5) of the reheater (4).
3. a kind of high-calcium powder flue-gas desulphurization system according to claim 1, which is characterized in that the sedimentation basin (9)
Liquid squeezes into desulfurizing tower (3) through circulating pump (10).
4. a kind of high-calcium powder flue-gas desulphurization system according to claim 1, which is characterized in that the desulfurizing tower (3) is even
Connect stirring pool (7).
5. a kind of high-calcium powder flue-gas desulphurization system according to claim 4, which is characterized in that the stirring pool (7) with
And soda ash is added in slurry pool (6).
6. a kind of high-calcium powder flue-gas desulphurization system according to claim 5, which is characterized in that the soda ash is carbonic acid
Sodium.
7. a kind of a kind of application of high-calcium powder flue-gas desulphurization system as described in any one of claim 1-6 claim,
It is characterized in that, which is used to handle boiler high-calcium powder flue-gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383727.2A CN108043204B (en) | 2017-12-20 | 2017-12-20 | High-calcium pulverized coal flue gas desulfurization system and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383727.2A CN108043204B (en) | 2017-12-20 | 2017-12-20 | High-calcium pulverized coal flue gas desulfurization system and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108043204A true CN108043204A (en) | 2018-05-18 |
| CN108043204B CN108043204B (en) | 2024-01-26 |
Family
ID=62130605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711383727.2A Active CN108043204B (en) | 2017-12-20 | 2017-12-20 | High-calcium pulverized coal flue gas desulfurization system and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108043204B (en) |
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