CN208869418U - A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release - Google Patents
A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release Download PDFInfo
- Publication number
- CN208869418U CN208869418U CN201821494133.9U CN201821494133U CN208869418U CN 208869418 U CN208869418 U CN 208869418U CN 201821494133 U CN201821494133 U CN 201821494133U CN 208869418 U CN208869418 U CN 208869418U
- Authority
- CN
- China
- Prior art keywords
- pond
- order reaction
- reaction pond
- waste water
- processing system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000003513 alkali Substances 0.000 title claims abstract description 34
- 230000009977 dual effect Effects 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000012545 processing Methods 0.000 title claims abstract description 30
- 238000005201 scrubbing Methods 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 93
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 230000023556 desulfurization Effects 0.000 claims abstract description 42
- 238000004062 sedimentation Methods 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims description 23
- 229910052602 gypsum Inorganic materials 0.000 claims description 20
- 239000010440 gypsum Substances 0.000 claims description 20
- 239000000920 calcium hydroxide Substances 0.000 claims description 19
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 5
- 238000005189 flocculation Methods 0.000 claims description 5
- 230000016615 flocculation Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract description 4
- 239000003517 fume Substances 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 230000036632 reaction speed Effects 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 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
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model provides a kind of processing system of dual alkali scrubbing FGD process waste water near-zero release, including sump, the first open trough, reaction tank, sedimentation basin, the second open trough, mix pond, clear water reserviors and plate and frame filter press, wherein the reaction tank includes first order reaction pond, second order reaction pond and third-order reaction pond, and it is sequentially connected, wherein, the water inlet in the first order reaction pond is connect with first open trough, and its top is equipped with desulfurization antisludging agent chemicals dosing plant and flocculant chemicals dosing plant, second order reaction pond is connected with air aeration system.The utility model in reaction tank by being aerated, and add desulfurization antisludging agent JHWT-FGD-4, effectively increase smoke desulfurization efficiency, stabilize the concentration of SO 2 from fume discharge, it reduces and is especially the content into scale-forming ion easy in the desulphurization circulating liquid of absorption tower in desulphurization circulating liquid, reduces desulfurization wastewater discharge, realize the purpose of desulfurization wastewater near-zero release.
Description
Technical field
The utility model relates to wastewater zero discharge process fields, and in particular, to a kind of dual alkali scrubbing FGD process waste water is close
The processing system of zero-emission.
Background technique
Double alkali (the CaO/Ca (OH) of sodium calcium2- NaOH) method flue gas desulfurization technique generate desulfurization wastewater, containing a large amount of sodium,
Calcium, chlorine, sulfate radical, inferior sulfate radical and fluorine and heavy metal ion etc..Peng little Yu etc. is " Pitzer theory is in CaSO4-Ca(OH)2-
H2O system sulfate radical equilibrium concentration calculate in application ", Yan Ya alliance etc. is " solubility and solubility product of the calcium sulfate in salt water are real
Test research " and Zhu Jiabing in the research of " calcium sulfate is in the solubility in high temperature salting liquid " etc., show meeting in desulfurization wastewater
Exist simultaneously a large amount of easily crystal (sodium sulphate) and easy foulant (calcium sulfate, calcium sulfite etc.).Desulfurization wastewater is unprocessed,
Each material concentration is built up during continuous operation, in systems can serious scale blocking, be if being directly discharged to other
Serious harm will be generated in system or natural water environment.
Inventor has found that conventional dual alkali scrubbing FGD process system has the following disadvantages: conventional Dual alkali under study for action
Desulphurization system theoretically can be with reliability service.But in practical operation operation, due to flue gas fluctuating change, to guarantee that flue gas is de-
Sulphur efficiency causes lime/liquid alkaline without forensic science, in time, accurately adds, so that the crystallization fouling such as absorption tower, reaction tank is serious.
In conclusion existing dual alkali scrubbing FGD process system there are aiming at the problem that, do not tear open very much greatly change under the premise of, explore exploitation
Follow-on dual alkali scrubbing FGD process has significant economic benefit and important Engineering Guidance meaning.
Utility model content
For the defects in the prior art, the purpose of the utility model is to provide a kind of dual alkali scrubbing FGD process waste water nearly zero
The processing system of discharge improves double alkali by adding air aeration system and desulfurization antisludging agent chemicals dosing plant etc. in reaction tank
Method desulfurization operation system, and be aerated in reaction tank, and add desulfurization antisludging agent JHWT-FGD-4, reduce desulphurization circulating
Especially smoke desulfurization efficiency is effectively increased, is stabilized into the content of scale-forming ion easy in the desulphurization circulating liquid of absorption tower in liquid
The concentration of SO 2 from fume discharge reduces desulfurization wastewater discharge, realizes the purpose of desulfurization wastewater near-zero release.
One aspect according to the present utility model provides a kind of processing system of dual alkali scrubbing FGD process waste water near-zero release
System, including sump, the first open trough, reaction tank, sedimentation basin, the second open trough, mixing pond, clear water reserviors and plate and frame filter press,
The sump, the first open trough, reaction tank, sedimentation basin, mixing pond and plate and frame filter press are successively connect with desulfuration absorbing tower；
Wherein
-- first open trough is connected to sump by elevator pump, is stirred throwing device with milk of lime and is connected by pipeline
It connects；Milk of lime agitating device throws the milk of lime being stirred into the first open trough, mixes with the waste water flowed into from sump；
-- the reaction tank includes first order reaction pond, second order reaction pond and third-order reaction pond, and it is sequentially connected, wherein
The water inlet in the first order reaction pond is connect with first open trough, and its top is equipped with desulfurization antisludging agent chemicals dosing plant and wadding
Solidifying agent chemicals dosing plant；Desulfurization antisludging agent JHWT-FGD-4 and flocculant PAC (aluminium polychloride) energy are added in first order reaction pond
The utilization efficiency of lime is effectively improved, the content of easy scale-forming ion in sedimentation basin clear liquid is reduced, reduces absorbing liquid de- from source
Fouling risk in sulphur tower；
-- the upper end of the sedimentation basin is equipped with water decanter, is clear liquid water outlet；The bottom of the sedimentation basin is equipped with sludge bucket,
It is connected to by pipeline with pond is mixed, and is provided with elevator pump between sedimentation basin and mixing pond；The sedimentation basin will be for that will react
Full gypsum slurries are staticly settled, and the clear liquid on top is discharged in clear water reserviors by water decanter, and the sludge for being deposited in bottom is logical
Elevator pump is crossed to be evacuated in mixing pond；
-- the clear water reserviors are connect with soda chemicals dosing plant, and are connected to by the second open trough with the desulfuration absorbing tower；
Soda, which is added in clear water reserviors, carries out neutralization reaction with the clear liquid flowed out in sedimentation basin, to adjust the pH value of clear liquid；
-- the mixing pond is connect by elevator pump with plate and frame filter press, and the pressing filtering liquid discharge outlet of the plate and frame filter press is logical
Piping is connect with first order reaction pond.
Preferably, the desulfurization antisludging agent chemicals dosing plant adds desulfurization into first order reaction pond using impact type dosing method
Antisludging agent；Impact type dosing method can effectively quickly increase the production quantity of sediment.
Preferably, the water inlet in the second order reaction pond is connect with the water outlet in first order reaction pond, water outlet and three-level
The water inlet of reaction tank connects, and second order reaction pond is connected with air aeration system；Waste water and milk of lime pass through in reaction tank
It is stirred and is reacted；In the prior art, waste water only reacts in open-top receptacle with milk of lime, it may appear that gypsum aoxidizes not
Situations such as abundant, and this system connects air aeration system in second order reaction pond, is aerated, so that gypsum and air are abundant
Contact, oxidation is more complete, and increases waste water and milk of lime mixing probability, improves reaction speed.
Preferably, the water outlet in the third-order reaction pond is connect with the sedimentation basin, and its top and flocculation aid dosing fill
Connection is set, adds flocculation aid PAM (polyacrylamide) in third-order reaction pond, facilitates the gypsum slurries for obtaining reaction heavy
Solid-liquid layering is quickly carried out in the pond of shallow lake, the time is saved, and solid-liquid layering is more complete, convenient for the progress of subsequent technique.
Preferably, blender is equipped in the first order reaction pond, second order reaction pond and third-order reaction pond；Fill reaction more
Divide quick.
Preferably, the water decanter is connect with the second open trough.
Preferably, the sludge bucket is the structure of falling tetragonous cone table, facilitates elevator pump and extracts sludge into mixing pond.
Preferably, the mixing pond is connect with air aeration system, is aerated, and reaction can be promoted more abundant.
Preferably, blender is equipped in the mixing pond to facilitate elevator pump so that gypsum slurries are not stratified and extract to plate
Filters pressing is carried out in frame filter press, if being in solid-liquid stratification state, will affect filters pressing effect.
Preferably, the mixing pond periodically passes through slush pump gypsum slurries is pumped into plate and frame filter press filters pressing, carries out
It is separated by solid-liquid separation；The gypsum filter cake periodically outward transport processing, filtrate are back to first order reaction pond.
Compared with prior art, the utility model have it is following the utility model has the advantages that
(1) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, design principle are as follows:
Double alkali method desulfurizing operating system is improved by adding air aeration system and desulfurization antisludging agent chemicals dosing plant etc. in reaction tank,
And be aerated in reaction tank, and add desulfurization antisludging agent JHWT-FGD-4, it reduces in desulphurization circulating liquid especially into suction
The content for receiving easy scale-forming ion in tower desulphurization circulating liquid, effectively increases smoke desulfurization efficiency, stabilizes SO 2 from fume row
The concentration put reduces desulfurization wastewater discharge, realizes the purpose of desulfurization wastewater near-zero release；
(2) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, in first order reaction
Pond adds desulfurization antisludging agent JHWT-FGD-4, improves the reaction efficiency of sulfate radical in lime/milk of lime and doctor solution, increases stone
Ash/milk of lime utilization efficiency reduces the yield of gypsum under the premise of guaranteeing sulfate radical removing amount, can greatly reduce gypsum
The processing cost of solid waste；
(3) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, in first order reaction
Pond adds desulfurization antisludging agent JHWT-FGD-4, moreover it is possible to substantially reduce the calcium ion content in sedimentation basin clear liquid, clear liquid reuse, which is done, inhales
Liquid is received, absorbing liquid is reduced and enters the deposition fouling risk after desulfurizing tower；
(4) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, in first order reaction
Air aeration system is added in pond and mixing pond, is aerated, increases waste water and milk of lime mixing probability, reaction speed is improved
Degree, and gypsum and air are come into full contact with, it aoxidizes more complete；
(5) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, system composition letter
Single, ingenious in design, significant effect；
(6) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, system composition close
Reason, waste water near-zero release, environmental protection and energy saving；
(7) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, it is easy for installation fast
Victory, reaction is sufficiently quick, realizes process automation；
(8) processing system of dual alkali scrubbing FGD process waste water near-zero release involved in the utility model, system are simply high
Effect, it is at low cost, it is suitable for large-scale promotion.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon:
Fig. 1 is the composition connection schematic diagram of the processing system of dual alkali scrubbing FGD process waste water near-zero release；
In Fig. 1,1 it is desulfuration absorbing tower, 2 is first order reaction pond, 3 is second order reaction pond, 4 is third-order reaction pond, 5 is precipitating
Pond, 6 be mix pond, 7 be plate and frame filter press, 8 be clear water reserviors.
Specific embodiment
The utility model is described in detail combined with specific embodiments below.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made.
These are all within the protection scope of the present invention.
Embodiment
The utility model discloses a kind of processing system of dual alkali scrubbing FGD process waste water near-zero release, system composition connects
It is as shown in Fig. 1 to connect schematic diagram: including sump, the first open trough, reaction tank, sedimentation basin 5, the second open trough, mix pond 6,
Clear water reserviors 8 and plate and frame filter press 7, the sump, reaction tank, sedimentation basin 5, mix pond 6 and plate and frame filter press at the first open trough
7 successively connect with desulfuration absorbing tower 1；
Wherein
-- first open trough is connected to sump by elevator pump, is stirred throwing device with milk of lime and is connected by pipeline
It connects；Milk of lime agitating device throws the milk of lime being stirred into the first open trough, mixes with the waste water flowed into from sump；
-- the reaction tank includes first order reaction pond 2, second order reaction pond 3 and third-order reaction pond 4, and it is sequentially connected,
In, the water inlet in the first order reaction pond 2 is connect with first open trough, and its top is equipped with desulfurization antisludging agent chemicals dosing plant
With flocculant chemicals dosing plant；Desulfurization antisludging agent JHWT-FGD-4 and flocculant PAC (polyaluminium are added in first order reaction pond 2
Aluminium) utilization efficiency of lime can be effectively improved, the easily content of scale-forming ion is reduced in 5 clear liquid of sedimentation basin, reduces and absorbs from source
Fouling risk of the liquid in desulfurizing tower；
-- the upper end of the sedimentation basin 5 is equipped with water decanter, is clear liquid water outlet；The bottom of the sedimentation basin 5 is equipped with sludge
Bucket is connected to pond 6 is mixed by pipeline, and is provided with elevator pump between sedimentation basin 5 and mixing pond 6；The sedimentation basin 5 is used for will
The gypsum slurries of fully reacting are staticly settled, and the clear liquid on top is discharged in clear water reserviors 8 by water decanter, are deposited in bottom
Sludge is evacuated to by elevator pump and is mixed in pond 6；
-- the clear water reserviors 8 are connect with soda chemicals dosing plant, and are connected by the second open trough and the desulfuration absorbing tower 1
It is logical；Soda, which is added in clear water reserviors 8, carries out neutralization reaction with the clear liquid flowed out in sedimentation basin 5, to adjust the pH value of clear liquid；
-- the mixing pond 6 is connect by elevator pump with plate and frame filter press 7, the pressing filtering liquid discharge of the plate and frame filter press 7
Mouth is connect by pipeline with first order reaction pond 2.
Further, the desulfurization antisludging agent chemicals dosing plant is added using impact type dosing method into first order reaction pond 2
Desulfurization antisludging agent；Impact type dosing method can effectively quickly increase the production quantity of sediment, and desulfurization antisludging agent is desulfurization antisludging agent
JHWT-FGD-4。
Further, the water inlet in the second order reaction pond 3 is connect with the water outlet in first order reaction pond 2, water outlet with
The water inlet in third-order reaction pond 4 connects, and second order reaction pond 3 is connected with air aeration system；Waste water and milk of lime are in reaction tank
In mix by stirring and reacted；In the prior art, waste water only reacts in open-top receptacle with milk of lime, it may appear that gypsum
Aoxidize situations such as insufficient, and this system connects air aeration system in second order reaction pond 3, is aerated so that gypsum and
Air comes into full contact with, and oxidation is more complete, and increases waste water and milk of lime mixing probability, improves reaction speed.
Further, the water outlet in the third-order reaction pond 4 is connect with the sedimentation basin 5, and its top adds with flocculation aid
Medicine device connection, adds flocculation aid PAM (polyacrylamide) in third-order reaction pond 4, facilitates the calcium plaster for obtaining reaction
Liquid quickly carries out solid-liquid layering in sedimentation basin, the time is saved, and solid-liquid layering is more complete, convenient for the progress of subsequent technique.
Further, blender is equipped in the first order reaction pond 2, second order reaction pond 3 and third-order reaction pond 4；Make anti-
It should more sufficiently quickly.
Further, the water decanter is connect with the second open trough.
Further, the sludge bucket is the structure of falling tetragonous cone table, facilitates elevator pump and extracts sludge into mixing pond.
Further, the mixing pond 6 is connect with air aeration system, is aerated, and reaction can be promoted more abundant.
Further, it is equipped with blender in the mixing pond 6, so that gypsum slurries are not stratified, facilitates elevator pump extraction
Filters pressing is carried out into plate and frame filter press, if being in solid-liquid stratification state, will affect filters pressing effect.
Further, gypsum slurries are periodically pumped the filters pressing into plate and frame filter press 7 by slush pump by the mixing pond 6,
It is separated by solid-liquid separation；The gypsum filter cake periodically outward transport processing, filtrate are back to first order reaction pond 2.
The present embodiment have it is following the utility model has the advantages that
(1) by adding air aeration system and desulfurization antisludging agent chemicals dosing plant etc. in reaction tank, to improve Dual alkali de-
Sulphur operating system, and be aerated in reaction tank, and add desulfurization antisludging agent JHWT-FGD-4, it reduces in desulphurization circulating liquid
Especially into the content of scale-forming ion easy in the desulphurization circulating liquid of absorption tower, smoke desulfurization efficiency is effectively increased, flue gas is stabilized
The concentration of sulfur dioxide (SO2) emissions reduces desulfurization wastewater discharge, realizes the purpose of desulfurization wastewater near-zero release；
(2) desulfurization antisludging agent JHWT-FGD-4 is added in first order reaction pond, improves sulfuric acid in lime/milk of lime and doctor solution
The reaction efficiency of root increases lime/milk of lime utilization efficiency, and the production of gypsum is reduced under the premise of guaranteeing sulfate radical removing amount
Raw amount, can greatly reduce the processing cost of gypsum solid waste；
(3) desulfurization antisludging agent JHWT-FGD-4 is added in first order reaction pond, moreover it is possible to substantially reduce the calcium in sedimentation basin clear liquid
Absorbing liquid is done in ion concentration, clear liquid reuse, is reduced absorbing liquid and is entered the deposition fouling wind after desulfurizing tower；
(4) air aeration system is added in first order reaction pond and mixing pond, is aerated, increases waste water and milk of lime
Probability is mixed, improves reaction speed, and gypsum and air are come into full contact with, is aoxidized more complete；
(5) system forms simple, ingenious in design, significant effect；
(6) system forms reasonable, waste water near-zero release, environmental protection and energy saving；
(7) quick and easy for installation, reaction is sufficiently quick, realizes process full automation；
(8) system is simple and efficient, at low cost, suitable for large-scale promotion.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on the substantive content of the utility model.
Claims (10)
1. a kind of processing system of dual alkali scrubbing FGD process waste water near-zero release, which is characterized in that including sump, the first opening
Slot, sedimentation basin, the second open trough, mixes pond, clear water reserviors and plate and frame filter press at reaction tank, the sump, the first open trough,
Reaction tank, sedimentation basin, mixing pond and plate and frame filter press are successively connect with desulfuration absorbing tower；
Wherein
-- first open trough is connected to sump by elevator pump, is connect with milk of lime stirring throwing device by pipeline；
-- the reaction tank includes first order reaction pond, second order reaction pond and third-order reaction pond, and it is sequentially connected, wherein described
The water inlet in first order reaction pond is connect with first open trough, and its top is equipped with desulfurization antisludging agent chemicals dosing plant and flocculant
Chemicals dosing plant；
-- the upper end of the sedimentation basin is equipped with water decanter, is clear liquid water outlet；The bottom of the sedimentation basin is equipped with sludge bucket, leads to
Piping is connected to pond is mixed, and is provided with elevator pump between sedimentation basin and mixing pond；
-- the clear water reserviors are connect with soda chemicals dosing plant, and are connected to by the second open trough with the desulfuration absorbing tower；
-- the mixing pond connect by elevator pump with plate and frame filter press, the pressing filtering liquid discharge outlet of plate and frame filter press pass through pipeline and
The connection of first order reaction pond.
2. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
Desulfurization antisludging agent chemicals dosing plant adds desulfurization antisludging agent into first order reaction pond using impact type dosing method.
3. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
The water inlet in second order reaction pond is connect with the water outlet in first order reaction pond, and water outlet is connect with the water inlet in third-order reaction pond,
And second order reaction pond is connected with air aeration system.
4. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
The water outlet in third-order reaction pond is connect with the sedimentation basin, and its top is connect with flocculation aid chemicals dosing plant.
5. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
Blender is equipped in first order reaction pond, second order reaction pond and third-order reaction pond.
6. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
Water decanter is connect with the second open trough.
7. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
Sludge bucket is the structure of falling tetragonous cone table.
8. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
Pond is mixed to connect with air aeration system.
9. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that described
It mixes and is equipped with blender in pond.
10. the processing system of dual alkali scrubbing FGD process waste water near-zero release according to claim 1, which is characterized in that institute
It states and mixes pond and periodically pass through slush pump gypsum slurries are pumped into plate and frame filter press filters pressing, be separated by solid-liquid separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821494133.9U CN208869418U (en) | 2018-09-13 | 2018-09-13 | A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821494133.9U CN208869418U (en) | 2018-09-13 | 2018-09-13 | A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208869418U true CN208869418U (en) | 2019-05-17 |
Family
ID=66467544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821494133.9U Expired - Fee Related CN208869418U (en) | 2018-09-13 | 2018-09-13 | A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208869418U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429893A (en) * | 2020-11-30 | 2021-03-02 | 杭州正和纳米科技有限公司 | Desulfurization wastewater treatment process and system |
| CN112897734A (en) * | 2021-01-16 | 2021-06-04 | 佰利天控制设备(北京)股份有限公司 | External drainage discharge system for fine desulfurization of coal gas |
-
2018
- 2018-09-13 CN CN201821494133.9U patent/CN208869418U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429893A (en) * | 2020-11-30 | 2021-03-02 | 杭州正和纳米科技有限公司 | Desulfurization wastewater treatment process and system |
| CN112897734A (en) * | 2021-01-16 | 2021-06-04 | 佰利天控制设备(北京)股份有限公司 | External drainage discharge system for fine desulfurization of coal gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105692959B (en) | A kind of desulfurizing waste water processing device and method of low sludge yield | |
| CN104761079A (en) | Flue gas desulfurization wastewater treatment process for coal-fired boiler | |
| CN107758962A (en) | A kind of system of the preparing magnesium sulfate from desulfurization wastewater | |
| CN102531229A (en) | Comprehensive treatment process of desulfuration waste water | |
| CN103693770A (en) | Purifying device for wet-process flue gas desulfurization wastewater and using method thereof | |
| CN106938866A (en) | A kind of desulfurization wastewater resource utilization system and method | |
| CN208869418U (en) | A kind of processing system of dual alkali scrubbing FGD process waste water near-zero release | |
| CN111423046A (en) | Power plant desulfurization wastewater advanced treatment and resource utilization system and method | |
| CN112429877A (en) | Method for reducing chloride ion concentration in wastewater | |
| CN206127018U (en) | Pretreatment systems suitable for thermal power plant's desulfurization waste water | |
| CN107285489A (en) | A kind of device and method of desulfurization wastewater pretreatment | |
| CN103011462B (en) | Device and method for treating waste residues of circulating make-up water by reutilizing lime softening method of power plant | |
| CN107215980A (en) | The device and method of novel desulphurization wastewater treatment | |
| CN110697939A (en) | Thermal power plant flue gas desulfurization wastewater chlorine reduction recycling system and process | |
| CN110745927A (en) | Coupling separation device for removing SS (suspended substance) in catalytic cracking flue gas desulfurization wastewater | |
| CN206901925U (en) | The device of novel desulphurization wastewater treatment | |
| CN109095483A (en) | A kind of system and its application method of oxalate precipitation method recycling power plant desulfurization wastewater calcium and magnesium | |
| CN203128332U (en) | Acidic industrial wastewater treatment system | |
| CN108686481A (en) | Caustic sludge desulfuration and the two-way combined governance device of desulfurization wastewater and administering method | |
| CN206735967U (en) | A kind of desulfurization wastewater resource utilization system | |
| CN209456086U (en) | A kind of system of oxalate precipitation method recycling power plant desulfurization wastewater calcium and magnesium | |
| CN208829348U (en) | A kind of desulfurization wastewater sofening treatment system | |
| CN208526285U (en) | Caustic sludge desulfuration and the two-way combined governance device of desulfurization wastewater | |
| CN208829427U (en) | A kind of high SS waste water treatment system of filtering | |
| CN207792876U (en) | A kind of desulfurizing waste water processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |