CN108975570A - A kind of device and method handling industrially desulfurized waste water using stack gases - Google Patents
A kind of device and method handling industrially desulfurized waste water using stack gases Download PDFInfo
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- CN108975570A CN108975570A CN201811093287.1A CN201811093287A CN108975570A CN 108975570 A CN108975570 A CN 108975570A CN 201811093287 A CN201811093287 A CN 201811093287A CN 108975570 A CN108975570 A CN 108975570A
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- acid
- stack gases
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- 239000002351 wastewater Substances 0.000 title claims abstract description 61
- 239000007789 gas Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003750 conditioning effect Effects 0.000 claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 31
- 238000005273 aeration Methods 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 22
- 230000023556 desulfurization Effects 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- 238000001728 nano-filtration Methods 0.000 claims abstract description 18
- 238000005189 flocculation Methods 0.000 claims abstract description 15
- 230000016615 flocculation Effects 0.000 claims abstract description 15
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 93
- 239000002253 acid Substances 0.000 claims description 38
- 239000000243 solution Substances 0.000 claims description 34
- 150000002500 ions Chemical class 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000001376 precipitating effect Effects 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 9
- 238000009298 carbon filtering Methods 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 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000006386 neutralization reaction Methods 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 229910052740 iodine Inorganic materials 0.000 claims description 3
- 239000011630 iodine Substances 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 23
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 10
- 239000001569 carbon dioxide Substances 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 9
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 9
- 229910001424 calcium ion Inorganic materials 0.000 description 9
- 229910001425 magnesium ion Inorganic materials 0.000 description 9
- 229960004424 carbon dioxide Drugs 0.000 description 8
- 208000028659 discharge Diseases 0.000 description 7
- 239000011575 calcium Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 125000001309 chloro group Chemical group Cl* 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- B01D53/62—Carbon oxides
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4602—Treatment of water, waste water, or sewage by electrochemical methods for prevention or elimination of deposits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention discloses a kind of equipment for handling industrially desulfurized waste water using stack gases, primary sedimentation tank, aeration tank, alkaline conditioning tank, electric flocculation device, softening aeration tank, filter device, active carbon filter, nanofiltration membrane, reverse osmosis treatment device, resins exchange device and bipolar membrane device including passing sequentially through pipeline connection.The present invention utilizes the carbon dioxide treatment desulfurization wastewater in factory, power-plant flue gas discharge, achieve the effect that remove hardness, the carbon dioxide in removing exhaust gas is removed using desulfurization wastewater technique again, realizing reduces carbon emission, achieve the purpose that purify plant chimney stalk and exhaust gas simultaneously, there is good promotion prospect and application value.
Description
Technical field
It is related to waste water treatment process the present invention relates to one kind more particularly to a kind of flue gas method handles the place of industrially desulfurized waste water
Science and engineering skill.
Background technique
Desulfurization wastewater is mainly the discharge water on absorption tower during boiler smoke wet desulphurization (limestone/gypsum method).For
The balance for maintaining desulfurizer serum recycle system substance, preventing soluble fraction i.e. cl concn in flue gas is more than specified value and guarantor
Demonstrate,prove gypsum quality, it is necessary to a certain amount of waste water is discharged from system, waste water is mainly from gypsum dehydration and cleaning system.In waste water
The impurity contained mainly includes suspended matter, oversaturated sulphite, sulfate and heavy metal, wherein being much national environmental protection
The first pollutant of strict control is required in standard.Desulfurization wastewater zero discharge treatment technology has following several method at present: 1)
Pretreatment softening: at present using Dual alkali etc., problem is desulfurization wastewater extreme hardness (being greater than 10000 milligrams per liter)；2) film is dense
Reduction: due to just determining film in this high pollution based on this principle regardless of being all made of molecular sieve principle using that film
Under the conditions of the service life will not be too long, and at present this kind of membrane material can't domesticize very well, price is more expensive, and it is unnecessary to consume China
A large amount of foreign exchange reserves etc..It is folded at user or vulnerable part (film) is with changing frequently, it is used averagely to arrive running cost waterborne per ton
It is high；3) evaporation MVR method: investment is excessive, and Universal Faults rate is higher, it is high to consume a large amount of electric energy operating costs, while generating danger
Solid waste impurity salt can not be disposed or disposal costs are high.4) direct flue spray process: it is same to influence dust removing effects for damage cleaner
When generate that dangerous solid waste impurity salt can not be disposed or disposal costs are high.5) high-temperature flue gas spray drying process: by exhaust gas volumn cigarette
The restraining factors such as gas temperature fluctuation are affected, while generating that dangerous solid waste impurity salt can not be disposed or disposal costs are high.With
The treatment effect that upper processing method has is poor, and some processing costs are high, needs further to improve.
Summary of the invention
Goal of the invention: present invention aims in view of the deficiencies of the prior art, two in factory, power-plant flue gas discharge are utilized
The method that carbonoxide handles industrially desulfurized waste water reduces cost for wastewater treatment, lifting waste water treatment effect.
Technical solution: the equipment of the present invention for handling industrially desulfurized waste water using stack gases, including pass sequentially through pipe
The primary sedimentation tank of road connection, aeration tank, alkaline conditioning tank, electric flocculation device, softening aeration tank, filter device, active carbon filter,
Nanofiltration membrane, reverse osmosis treatment device, resins exchange device and bipolar membrane device；
The water inlet of the primary sedimentation tank is connected to desulfurization wastewater raw water discharge outlet, two water outlets point of the bipolar membrane device
It is not connected to acid compartment and alkaline chamber；The aeration tank and the air inlet for softening aeration tank are connected to desulfurization rear end flue respectively；It is described
Primary sedimentation tank, aeration tank, alkaline conditioning tank, electric flocculation device, softening aeration tank, filter device and active carbon filter solid go out
Mouth is connected to sludge collecting pit；The nanofiltration membrane, reverse osmosis treatment device, resins exchange device and bipolar membrane device concentrated water go out
The mouth of a river is connected to the water inlet of wastewater collection pond.
Preferably, the water outlet of the wastewater collection pond is connected to the water inlet of primary sedimentation tank.
Preferably, it is additionally provided with acid conditioning tank between the active carbon filter and nanofiltration membrane and neutralizes water tank, it is described
The water outlet of active carbon filter is connected to the water inlet of acid conditioning tank, the water outlet and neutralization water tank of the acidity conditioning tank
Water inlet connection, it is described neutralize water tank water outlet be connected to the water inlet of the nanofiltration membrane.
Preferably, the outlet of the acid compartment is connected to the filling opening of the acid conditioning tank, the outlet of the alkaline chamber and institute
State the filling opening connection of alkaline conditioning tank.
The method of the present invention for handling industrially desulfurized waste water using stack gases, includes the following steps:
(1), desulfurization wastewater raw water is put to primary sedimentation tank or buffer pool, preliminary sedimentation is carried out, into primary sedimentation tank or buffer pool
20~55 DEG C of stack gases are passed through, calcium ions and magnesium ions in carbon dioxide and water is promoted to form carbonic acid precipitating；
(2), it will be discharged into pH conditioning tank through the supernatant in step (1) treated primary sedimentation tank or buffer pool, and in pond
Sodium hydroxide is added, solution in pond is adjusted to alkalinity, forms OH root calcium and magnesium precipitating in pond；
(3), the alkaline aqueous solution after adjusting step (2) is added electric flocculation device and carries out electric flocculation reaction, removes part
Calcium ions and magnesium ions and heavy metal；
(4), softening aeration tank is added in clear liquid, and sodium carbonate is added in pond, replace calcium ions and magnesium ions, then be passed through 20~55
DEG C stack gases, promote calcium ions and magnesium ions in carbon dioxide and water to form carbonic acid precipitating；
(5), after mechanical filter or micro-filtrate membrane filtration, sediment, the sludge of generation enter the supernatant of aeration tank
Desulphurization system filter press, the clear water of generation enter active carbon filtering device filtering, go the chlorine residue generated in water removal by electric flocculation, and
Further remove the suspended matter and coloration in water removal；
(6), step (5) filtered clear water enters nanofiltration membrane and is separated into monovalent ion solution and divalent ion solution；
(7), the divalent ion solution that step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water is discharged into waste water
Collecting pit；The monovalent ion solution that step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water enters resins exchange
Device, the water outlet of resins exchange device enter bipolar membrane device and are separated into acid solution and aqueous slkali, by acid solution and aqueous slkali point
It is not recovered to acid compartment and alkaline chamber reuse.
Preferably, the precipitating that step (1), step (2), step (3), step (4) and step (5) generate enters desulfurization system
System filter press, and it is discharged into reuse in sludge collecting pit.
Preferably, the concentrated water that step (6) and step (7) generate is discharged into wastewater collection pond after processing, wastewater collection pond
Middle waste water repeats step (1)~(7) after mixing with desulfurization wastewater raw water.
Preferably, active carbon filter of the active carbon filtering device for iodine number 800~1000, active carbon mistake in step (5)
The water inlet end of filter is little particle, and water outlet is bulky grain.
Preferably, the indoor aqueous slkali of alkali is discharged into the pH conditioning tank in step (2) in step (7), solution in conditioning tank
PH value.
Preferably, clear water is first adjusted in acid conditioning tank acid molten after active carbon filtering device filters in step (5)
After liquid, enters back into and neutralize water tank neutralization, finally enter nanofiltration membrane.
Preferably, the indoor acid solution of acid is discharged into acid conditioning tank in step (7), the pH value of solution in conditioning tank.
The present invention reaches the effect of removal hardness using the carbon dioxide treatment desulfurization wastewater in factory, power-plant flue gas discharge
Fruit, and the carbon dioxide in removing exhaust gas is removed using desulfurization wastewater technique, realizing reduces carbon emission, while reaching purification plant chimney stalk
With the purpose of exhaust gas, there is good promotion prospect and application value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present device.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
Embodiment: a kind of equipment handling industrially desulfurized waste water using stack gases, including passing sequentially through pipeline connection
Primary sedimentation tank 1, aeration tank 2, alkaline conditioning tank 3, electric flocculation device 4, softening aeration tank 5, filter device 6, active carbon filter 7,
Acid conditioning tank 8 neutralizes water tank 9, nanofiltration membrane 10, reverse osmosis treatment device 11, resins exchange device 12 and bipolar membrane device 13；
The water inlet of primary sedimentation tank 1 is connected to desulfurization wastewater raw water discharge outlet, two water outlets of bipolar membrane device 13 respectively with
Acid compartment 14 is connected to alkaline chamber 15, and the outlet of acid compartment 14 is connected to the filling opening of acid conditioning tank 8, and the outlet of alkaline chamber 15 and alkalinity are adjusted
Save the filling opening connection in pond 3；Aeration tank 2 and the air inlet for softening aeration tank 5 are connected to desulfurization rear end flue respectively；Primary sedimentation tank 1,
Aeration tank 2, alkaline conditioning tank 3, electric flocculation device 4, softening aeration tank 5, filter device 6 and active carbon filter 7 solid go out
Mouth is connected to sludge collecting pit 16；Nanofiltration membrane 10, reverse osmosis treatment device 11, resins exchange device 12 and bipolar membrane device 13
Concentrated water water outlet is connected to the water inlet of wastewater collection pond 17, and the water outlet of wastewater collection pond 17 and the water inlet of primary sedimentation tank 1 connect
It is logical.
A method of industrially desulfurized waste water being handled using stack gases, is included the following steps:
(1), desulfurization wastewater raw water is put to primary sedimentation tank or buffer pool, preliminary sedimentation is carried out, into primary sedimentation tank or buffer pool
20~55 DEG C of stack gases are passed through, calcium ions and magnesium ions in carbon dioxide and water is promoted to form carbonic acid precipitating；
(2), it will be discharged into pH conditioning tank through the supernatant in step (1) treated primary sedimentation tank or buffer pool, and in pond
Sodium hydroxide is added, solution in pond is adjusted to alkalinity, forms OH root calcium and magnesium precipitating in pond；
(3), the alkaline aqueous solution after adjusting step (2) is added electric flocculation device and carries out electric flocculation reaction, removes part
Calcium ions and magnesium ions and heavy metal；
(4), softening aeration tank is added in clear liquid, and sodium carbonate is added in pond, replace calcium ions and magnesium ions, then be passed through 20~55
DEG C stack gases, promote calcium ions and magnesium ions in carbon dioxide and water to form carbonic acid precipitating；
(5), after mechanical filter or micro-filtrate membrane filtration, sediment, the sludge of generation enter the supernatant of aeration tank
Desulphurization system filter press, the clear water of generation enter active carbon filtering device filtering, and active carbon filtering device is iodine number 800~1000
Active carbon filter, the water inlet end of active carbon filter is little particle, and water outlet is bulky grain, is gone in water removal because electric flocculation produces
Raw chlorine residue, and suspended matter and coloration in water removal are further removed, extend rear end nanofiltration, reverse osmosis membrane group service life；Filtering
After clear water afterwards is first adjusted to acid solution in acid conditioning tank, enters back into and neutralize water tank neutralization, finally enter nanofiltration membrane point
From；
(6), clear water enters nanofiltration membrane and is separated into monovalent ion solution and divalent ion solution；
(7), the divalent ion solution that step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water is discharged into waste water
The monovalent ion solution that collecting pit step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water enters resins exchange dress
It sets, further removes calcium ions and magnesium ions, the water outlet of resins exchange device enters bipolar membrane device and is separated into acid solution and aqueous slkali, will
Acid compartment and alkaline chamber is separately recovered in acid solution and aqueous slkali, and the indoor aqueous slkali of alkali is discharged into the pH conditioning tank in step (2), adjusts
The pH value of solution in pond；The indoor acid solution of acid is discharged into acid conditioning tank, the pH value of solution in conditioning tank.
The precipitating that step (1), step (2), step (3), step (4) and step (5) generate enters desulphurization system filters pressing
Machine, and it is discharged into reuse in sludge collecting pit.The concentrated water that step (6) and step (7) generate is discharged into wastewater collection pond after processing,
Step (1)~(7) are repeated after waste water is mixed with desulfurization wastewater raw water in wastewater collection pond.
The useless discharge of desulfurization wastewater aneroid that treated, meanwhile, carbon dioxide content is greatly reduced in stack gases.
Laboratory is using some experimental data after identical chemical environment aeration 12min
| Ventilation air | CO2Concentration | Ca before handling2+ | Ca after processing2+ | PH before handling | PH after processing | |
| Waste water raw water 1 | 21℃ | 99.9% | 1404mg/L | 306mg/L | 9.1 | 8.7 |
| Waste water raw water 2 | 21℃ | 99.9% | 536mg/L | 82mg/L | 7.4 | 7.8 |
| Waste water raw water 1 | 55℃ | 75% | 1404mg/L | 243mg/L | 9.1 | 9.0 |
| Waste water raw water 2 | 55℃ | 75% | 536mg/L | 97mg/L | 7.4 | 7.6 |
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (10)
1. a kind of equipment for handling industrially desulfurized waste water using stack gases, which is characterized in that including passing sequentially through pipeline connection
Primary sedimentation tank, aeration tank, alkaline conditioning tank, electric flocculation device, softening aeration tank, filter device, active carbon filter, nanofiltration
Film, reverse osmosis treatment device, resins exchange device and bipolar membrane device；
The water inlet of the primary sedimentation tank is connected to desulfurization wastewater raw water discharge outlet, two water outlets of the bipolar membrane device respectively with
Acid compartment is connected to alkaline chamber；The aeration tank and the air inlet for softening aeration tank are connected to desulfurization rear end flue respectively；It is described just heavy
Pond, aeration tank, alkaline conditioning tank, electric flocculation device, softening aeration tank, filter device and active carbon filter solid outlet with
The connection of sludge collecting pit；The nanofiltration membrane, reverse osmosis treatment device, resins exchange device and bipolar membrane device concentrated water water outlet
It is connected to the water inlet of wastewater collection pond.
2. the equipment for handling industrially desulfurized waste water using stack gases according to claim 1, which is characterized in that the waste water
The water outlet of collecting pit is connected to the water inlet of primary sedimentation tank.
3. the equipment for handling industrially desulfurized waste water using stack gases according to claim 1, which is characterized in that the activity
It is additionally provided with acid conditioning tank between carbon filter and nanofiltration membrane and neutralizes water tank, the water outlet and acid of the active carbon filter
Property conditioning tank water inlet connection, it is described acidity conditioning tank water outlet with neutralization water tank water inlet be connected to, the neutralization water
The water outlet of case is connected to the water inlet of the nanofiltration membrane.
4. the equipment for handling industrially desulfurized waste water using stack gases according to claim 2, which is characterized in that the acid compartment
Outlet be connected to the filling opening of the acid conditioning tank, the filling opening company of the outlet of the alkaline chamber and the alkalinity conditioning tank
It is logical.
5. a kind of method for handling industrially desulfurized waste water using stack gases, which comprises the steps of:
(1), desulfurization wastewater raw water is put to primary sedimentation tank or buffer pool, 20~55 DEG C of flue is passed through into primary sedimentation tank or buffer pool
Exhaust gas carries out preliminary sedimentation；
(2), it will be discharged into pH conditioning tank through the supernatant in step (1) treated primary sedimentation tank or buffer pool, and is added in pond
Solution in pond is adjusted to alkalinity by sodium hydroxide；
(3), the alkaline aqueous solution after adjusting step (2) is added electric flocculation device and carries out electric flocculation reaction；
(4), softening aeration tank is added in clear liquid, and sodium carbonate is added in pond, then be passed through 20~55 DEG C of stack gases；
(5), for the supernatant of aeration tank after mechanical filter or micro-filtrate membrane filtration, sediment, the sludge of generation enter desulfurization
System filter press, the clear water of generation enter active carbon filtering device filtering；
(6), step (5) filtered clear water enters nanofiltration membrane and is separated into monovalent ion solution and divalent ion solution；
(7), the divalent ion solution that step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water is discharged into wastewater collection
Pond；The monovalent ion solution that step (6) obtains carries out reverse osmosis treatment, and reuse is discharged in clear water, and concentrated water enters resins exchange device,
The water outlet of resins exchange device enters bipolar membrane device and is separated into acid solution and aqueous slkali, and acid solution and aqueous slkali are separately recovered
To acid compartment and alkaline chamber reuse.
6. the method according to claim 5 for handling industrially desulfurized waste water using stack gases, which is characterized in that step
(1), the precipitating that step (2), step (3), step (4) and step (5) generate enters desulphurization system filter press, and is discharged into sludge
Reuse in collecting pit.
7. the method according to claim 5 for handling industrially desulfurized waste water using stack gases, which is characterized in that step
(6) it is discharged into wastewater collection pond after processing with the concentrated water of step (7) generation, waste water and desulfurization wastewater raw water in wastewater collection pond
Step (1)~(7) are repeated after mixing.
8. the method according to claim 5 for handling industrially desulfurized waste water using stack gases, which is characterized in that step
(5) active carbon filtering device is the active carbon filter of iodine number 800~1000 in, and the water inlet end of active carbon filter is small
Grain, water outlet is bulky grain.
9. the method according to claim 5 for handling industrially desulfurized waste water using stack gases, which is characterized in that step
(7) the indoor aqueous slkali of alkali is discharged into the pH conditioning tank in step (2) in, the pH value of solution in conditioning tank.
10. the method according to claim 5 for handling industrially desulfurized waste water using stack gases, which is characterized in that step
(5) after clear water is first adjusted to acid solution in acid conditioning tank after active carbon filtering device filtering in, neutralization water tank is entered back into
It neutralizes, finally enters nanofiltration membrane；The indoor acid solution of acid is discharged into acid conditioning tank in step (7), the pH of solution in conditioning tank
Value.
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