CN106823724A - A kind of flue gas integrated purification system for realizing wastewater zero discharge - Google Patents
A kind of flue gas integrated purification system for realizing wastewater zero discharge Download PDFInfo
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- 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
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- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
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- 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
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- 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
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- 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
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Abstract
Flue gas integrated purification system the present invention relates to realize wastewater zero discharge, belong to environmental project waste water and gas combined purifying and the novel energy-conserving technology for recycling, including exhaust gas integration processing unit, water supply installation, wastewater treatment equipment, exhaust gas integration processing unit includes high-pressure discharging device, PPCP reactors；Water supply installation includes supply tank, discharge casing, cyclic water tank, lye tank, some waste water flow-limiting valves, some liquid pumps and filter；Wastewater treatment equipment includes that tube type filter membrance component, micro-filtration produce water tank, cartridge filter, nanofiltration membrane component, nanofiltration product water tank, reverse osmosis membrane assembly, reverse osmosis concentrated water tank, nanofiltration concentrated water case, multiple-effect evaporation crystallization apparatus, reverse osmosis produced water tank.The present invention combines the mode of concentration plus evaporative crystallization, realizes SO2、NOx, the multiple pollutant such as dust integration removal, wastewater zero discharge is realized in processing procedure, that is, the zero-emission of waste water can be also realized while meeting flue gas minimum discharge requirement.
Description
Technical field
The present invention relates to flue gas integrated purifying field, especially a kind of flue gas integrated purifying for realizing wastewater zero discharge
System, belongs to waste water and waste gas combined purifying and the novel energy-conserving field of engineering technology of recycling in environmental project.
Background technology
Due to a large amount of burnings of coal, SO2、NOxThe main atmosphere pollution of China is turned into PM.Due to people
To the pay attention to day by day of atmosphere polluting problem, SO2、NOx, the pollutant such as PM discharge standard it is also more and more stricter.It is first in 2011
The secondary theory for proposing " minimum discharge ", and in 12 Third Sessions of the NPC in 2015《The government work report》In clearly
It is required that promoting coal-burning power plant's minimum discharge transformation, under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, discharged nitrous oxides
Concentration is no more than 5 mg/m respectively3、35mg/m3And 50mg/m3.As the cry of coal-fired plant flue gas minimum discharge is more and more fiery,
People are to realizing the attention rate of minimum discharge technology also more and more higher.
Typical technology route is administered in current flue gas minimum discharge collaboration mainly to be included with low temperature electrostatic precipitation technology as core
Flue gas collaboration Treatment process route and the flue gas with wet-esp technology as core collaboration Treatment process route.Low low temperature electric
Dedusting technology is that flue-gas temperature is reduced to below acid dew point by heat regenerator or smoke heat exchanging system, using flue gas volume stream
Amount diminishes with the characteristic of dust specific resistance decline with temperature reduction to improve dust catching efficiency with temperature reduction.With the skill
Art can realize dust and SO for the flue gas collaboration Treatment process of core3Efficient removal, but for SO2And NOxRemoval effect
Not substantially, it is and higher to coal requirement., it is necessary to existing deduster is substituted for into low temperature electric precipitation for improvement project
Device, also needs to increase heat regenerator in addition make flue-gas temperature be down to below acid dew point, and improvement cost is of a relatively high.
Wet electrical dust precipitator（WESP）It is that a kind of water removes the electric cleaner for adsorbing the dust on electrode, is mainly used in solution
The certainly dust emission problem after desulfurizing tower.Metal polar plate wet-esp technology is in corona wire using high-voltage pulse power source electric discharge
Surrounding produces corona layer, and the air in corona layer occurs avalanche type ionization, produces a large amount of anions, anion and dust or droplet
Particle collides and is attached to its surface charge, and charged particle, to dust polar motion, reaches collection in the presence of electrostatic field force
The extremely rear particle institute of dirt is electrically charged to be released and is collected by collecting plate；Current flowed down from dust collecting electrode top to be formed one layer it is uniform and stable
Moisture film, removes the dust collected in dust collecting electrode in the way of washing away.Meanwhile, the water smoke being sprayed onto in passage can also be captured or dissolving portion
Divide dust and SO3." reentrainment of dust " can be fundamentally eliminated using the method, efficiency of dust collection is greatly improved, and can reach extremely low cigarette
Dirt emission limit, to SO3Also can reach more than 60% removing effect.But for SO2And NOxRemoval effect equally not substantially,
And it is relatively difficult to achieve due to WESP equipment takes up an area larger and place in itself in actual improvement project.
For NOxRemoving be mainly NO be oxidized to water-soluble NO2、HNO2And HNO3Deng material, then again with alkali
Property absorbent reaction.In Practical Project, NO is oxidized to NO2Vapour phase oxidation process typically is used, i.e., mixes strong in flue gas
Oxidizing substance（Such as O, OH the isoreactivity free radical in plasma）.Impulse electric corona plasma chemical method（PPCP）It is to obtain
The preferred approach of plasma, since being proposed from the 80's of 20th century, because it can realize height to various flue gas pollutants
Effect is removed and received much concern.The flue gas integrated purifying technology with PPCP methods as core is not limited by coal condition simultaneously, is accounted for
Ground area is small, is particularly suited for being reached the need for having the improvement project of minimum discharge.On the other hand, in Practical Project, profit
A certain amount of waste water can be produced with PPCP methods, the waste water contains a certain amount of sulphite, sulfate, nitrate and other solids
Impurity, because its murder by poisoning is strong, it is difficult to which stably reaching standard is discharged, current China（And the U.S. and West Europe）All Qiang Zhiyaoqiu and realized zero-emission
Put, but at present temporarily without ripe processing method, and investment and operating cost are high.
The content of the invention
Present invention is generally directed to problem present in wastewater and exhaust gas purification treatment, a kind of wastewater zero discharge realized has been invented
Flue gas integrated purification system, the system combines the mode of concentration plus evaporative crystallization, can realize SO2、NOx, various dirts such as dust
The integration removal of dye thing, and wastewater zero discharge is realized in processing procedure, that is, while meeting flue gas minimum discharge requirement
Also the zero-emission of waste water can be realized.
Above-mentioned technical problem of the invention is carried out by the following technical programs：A kind of wastewater zero discharge realized
Flue gas integrated purification system, including exhaust gas integration processing unit, water supply installation, wastewater treatment equipment, it is characterised in that institute
Stating exhaust gas integration processing unit includes high-pressure discharging device, PPCP reactors；The water supply installation includes supply tank, draining
Case, cyclic water tank, lye tank, some waste water flow-limiting valves, some liquid pumps and filter；The wastewater treatment equipment includes that tubular type is micro-
Filter membrane component, micro-filtration produce water tank, cartridge filter, nanofiltration membrane component, nanofiltration product water tank, reverse osmosis membrane assembly, reverse osmosis concentrated water
Case, nanofiltration concentrated water case, multiple-effect evaporation crystallization apparatus, reverse osmosis produced water tank.
Using the above-mentioned flue gas integrated purification system for realizing wastewater zero discharge, produced in PPCP reactor runnings
Waste water realizes zero-emission by the way of concentration plus evaporative crystallization, and carrying out practically step is as follows：
The flue gas that a, boiler are produced sequentially passes through denitrification apparatus, electric cleaner, desulfurizer, PPCP reactors, most afterwards through chimney
Discharge, a large amount of waste water are produced in PPCP reactor runnings；
The waste water that b, PPCP reactor are produced enters discharge casing through the pipeline with waste water flow-limiting valve, and discharge casing plays depositing for waste water
Storage and the effect for precipitating；
C, oil removal is removed using tube type filter membrance component depth, after micro-filtration produces water through cartridge filter, into nanofiltration membrane component,
Sulfate is retained；
D, nanofiltration produce water and enter reverse osmosis membrane assembly, the most of salt contained in retention waste water；
E, reverse osmosis concentrated water are back to nanofiltration system and continue cycling through treatment, and reverse osmosis produced water is back to PPCP reactor spray groups
The spray process and system supply water of part；
F, nanofiltration concentrated water are processed through multiple-effect evaporation crystal system, and use fractional crystallization technique by the sulfate and nitric acid in waste water
Salt out, so as to realize the zero-emission of flue gas integrated purification system waste water.
Preferably, the negative pole of the high-pressure discharging device is connected with PPCP reactor corona wires, high-pressure discharging device
Positive pole is connected ground connection with dust collecting electrode.O, OH free radical of strong oxidizing property etc. is produced by electrion, SO is realized2、NOxAnd dust
Oxidation removal.The basic structure of the PPCP reactors can be line-board-like, pin-board-like, line-cartridge type；The PPCP reactions
Device can have a various deformation according to processing requirement, such as pin-plate electric discharge spacing is adjustable, dust collecting electrode shape, dust collecting electrode material etc.,
Deformation including reactor enclosure shape, material etc..
Preferably, the water supply installation, wherein discharge casing communication loop water tank；Cyclic water tank connects two liquid simultaneously
Pump, one of liquid pump connects filter, and filter is communicated to PPCP reactors again, another liquid pump connection lye tank；It is described
Supply tank connects the 3rd liquid pump, and the 3rd liquid pump is communicated to PPCP reactors again.
Preferably, being provided with waste water flow-limiting valve between the discharge casing and PPCP reactors；The discharge casing and circulation
Waste water flow-limiting valve is provided between water tank, setting waste water current limliting valve can adjust water according to actual conditions；The cyclic water tank
With automatic stirrer is provided with lye tank；Automatic stirrer makes its pH more stable accurate for being stirred continuously solution.
Preferably, the wastewater treatment equipment, wherein tube type filter membrance component, micro-filtration produce water tank, cartridge filter, receive
Filter membrane component, nanofiltration are produced water tank, reverse osmosis membrane assembly, reverse osmosis concentrated water tank and are sequentially communicated；Shown reverse osmosis concentrated water tank again with it is micro-
Water tank connection is produced in filter；Shown nanofiltration membrane component, nanofiltration concentrated water case, multiple-effect evaporation crystallization apparatus, reverse osmosis produced water tank are sequentially communicated；
The reverse osmosis membrane assembly is connected with reverse osmosis produced water tank again.
Preferably, tube type filter membrance component in discharge casing in the water supply installation and the wastewater treatment equipment it
Between be connected with liquid pump；The reverse osmosis produced water tank of the wastewater treatment equipment is connected with the supply tank in the water supply installation.
In sum, the present invention has the following advantages that compared with prior art：
The cleaning system that the present invention is provided, due to the strong oxidizing property of plasma, can realize SO2、NOxOxidation with dust takes off
Remove, wherein NOxClearance is significantly improved, and realizes the integrated purifying of flue gas；The waste water that the present invention is produced in the process of running
It is effectively handled and reuse, realizes wastewater zero discharge；The present invention is low to place space requirement, easy for installation, and equipment operation is steady
Fixed, more energy efficient, operating cost is low.
Brief description of the drawings
Fig. 1 is agent structure block diagram of the invention；
Fig. 2 is operating procedure block diagram of the present invention.
In figure marked as：1st, boiler；2nd, denitrification apparatus；3rd, air preheater；4th, electric cleaner；5th, blower fan；6th, desulfurization dress
Put；7th, PPCP reactors；8th, waste water flow-limiting valve；9th, discharge casing；10th, cyclic water tank；11st, filter；12nd, liquid pump；13rd, alkali lye
Case；14th, supply tank；15th, tube type filter membrance component；16th, micro-filtration produces water tank；17th, cartridge filter；18th, nanofiltration membrane component；19、
Water tank is produced in nanofiltration；20th, reverse osmosis membrane assembly；21st, reverse osmosis concentrated water tank；22nd, nanofiltration concentrated water case；23rd, multiple-effect evaporation crystal system；
24th, reverse osmosis produced water tank；25th, demister；26th, chimney.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment 1：
As shown in figure 1, a kind of flue gas integrated purification system for realizing wastewater zero discharge, agent structure is including at exhaust gas integration
Reason device, water supply installation, wastewater treatment equipment, the exhaust gas integration processing unit include that high-pressure discharging device, PPCP react
Device 7；The negative pole of high-pressure discharging device is connected with the corona wire of PPCP reactors 7, and the positive pole of high-pressure discharging device is connected with dust collecting electrode
Ground connection.
The water supply installation include supply tank 14, discharge casing 9, cyclic water tank 10, lye tank 13, multiple waste water flow-limiting valve 8,
Some liquid pumps 12 and filter 11；The wherein communication loop water tank 10 of discharge casing 9；Cyclic water tank 10 connects two liquid pumps simultaneously, its
In liquid pump 12 connection filter 11, filter 11 is communicated to PPCP reactors 7 again, and another liquid pump 12 connects lye tank
13；The supply tank 14 connects the 3rd liquid pump 12, and the 3rd liquid pump 12 is communicated to PPCP reactors 7 again.
Waste water flow-limiting valve 8 is provided between the discharge casing 9 and PPCP reactors 7；The discharge casing 9 and cyclic water tank 10
Between be provided with waste water flow-limiting valve 8；Automatic stirrer is provided with the cyclic water tank 10 and lye tank 13.
The wastewater treatment equipment includes that tube type filter membrance component 15, micro-filtration produces water tank 16, cartridge filter 17, NF membrane
Component 18, nanofiltration produces water tank 19, reverse osmosis membrane assembly 20, reverse osmosis concentrated water tank 21, nanofiltration concentrated water case 22, multiple-effect evaporation crystallization dress
Put 23, reverse osmosis produced water tank 24；Wherein tube type filter membrance component 15, micro-filtration produces water tank 16, cartridge filter 17, nanofiltration membrane component
18th, nanofiltration is produced water tank 19, reverse osmosis membrane assembly 20, reverse osmosis concentrated water tank 21 and is sequentially communicated；Shown reverse osmosis concentrated water tank 21 again with
Micro-filtration produces water tank 16 and connects；Shown nanofiltration membrane component 18, nanofiltration concentrated water case 22, multiple-effect evaporation crystallization apparatus 23, reverse osmosis produced water
Case 24 is sequentially communicated；The reverse osmosis membrane assembly 20 is connected with reverse osmosis produced water tank 24 again.
Connected between the tube type filter membrance component 15 in discharge casing 9 and the wastewater treatment equipment in the water supply installation
There is liquid pump 12；The reverse osmosis produced water tank 24 of the wastewater treatment equipment is connected with the supply tank 14 in the water supply installation.
As shown in Fig. 2 the flue gas integrated purification system for realizing wastewater zero discharge, also including boiler 1, denitrification apparatus
2nd, air preheater 3, electric cleaner 4, blower fan 5, demister 25 and chimney 26 etc..
Carrying out practically step is：Boiler 1 discharges flue gas, and the flue gas system is actual flue gas, can be sintered discharge gas, ball
Group's waste gas, blast furnace gas, coke-stove gas, coal-fired plant boiler waste gas, furnace exhaust etc. need to meet minimum discharge requirement
Flue gas；Flue gas removes most of NOx by denitrification apparatus 2 first, then the heat of heat smoke and air is realized by air preheater 3
Exchange, reduce thermal losses, the flue-gas temperature of electric cleaner 4 can also be lowered into addition, improve efficiency of dust collection, then by electricity
The blower fan 5 in the exit of deduster 4 carries out desulfurization process into desulfurizer 6, subsequently into the reality with PPCP reactors 7 as core
The flue gas integrated purifying device of existing wastewater zero discharge carries out pollutant secondary deep treatment, eventually passes at the demisting of demister 25
Discharged from chimney 26 after reason.
Wherein, PPCP reactors 7 can produce the waste water of a certain amount of waste water, general 300MW units to produce in the process of running
Raw amount is about 12 t/h or so.The wastewater pH is about 6.5, in faintly acid, mainly contains a certain amount of sulphite, sulfuric acid
Salt, nitrate and other solid impurities, with certain toxicity and are difficult disposal.The present invention is set in the lower end of PPCP reactors 7
Discharge pipe line, is mounted with waste water flow-limiting valve 8 to control wastewater flow on pipeline, and waste water is accessed into discharge casing 9, discharge casing 9
In most of water be circulated utilization into cyclic water tank 10, appropriate alkaline liquor is pumped to following from lye tank 13 by liquid pump 12
Ring water tank 10 carries out the regulation of pH, and the water of cyclic water tank 10 for front end spray equipment after the filtration treatment of filter 11 by rinsing
Motor, sprays, and benefit is played to system water additionally, being also provided with supply tank 14 and providing raw water to rear end spray equipment
The effect filled.Pumped the part water in discharge casing 9 by liquid pump 12 is carried out treatment and realizes waste water zero-emission to wastewater treatment equipment
Put.
In wastewater treatment equipment, waste water raw water discharge casing 9 precipitation after, upper strata primary water through tube type filter membrance component 14 at
Reason, depth removes oil removal, and micro-filtration concentrated water is back to discharge casing 9 again, produces water and then enters micro-filtration product water tank 16, and micro-filtration produces water tank
After 16 water is through cartridge filter 17, into nanofiltration membrane component 18, sulfate is retained, nanofiltration is produced water and enters nanofiltration product water
Case 19, then processed via reverse osmosis membrane assembly 20, concentrated water enters nanofiltration concentrated water case 22, and reverse osmosis produced water enters reverse osmosis produced water tank
24, reuse to the makeup Water System of supply tank 14.Reverse osmosis concentrated water is back to micro-filtration and produces water tank 16, weight via reverse osmosis concentrated water tank 21
Fresh warp thread is processed by nanofiltration system.Concentrated water in nanofiltration concentrated water case 22 enters multiple-effect evaporation crystal system 23, and vapo(u)rization system produces water simultaneously
Enter reverse osmosis produced water tank 24, crystal system uses fractional crystallization technique, sulfate and nitric acid of the purity more than 95% are obtained respectively
Salt.
Application example：Certain power plant 350MW coal units, under 100% load, the exhaust gas volumn discharged from boiler 1 is 19.2
Ten thousand Nm3/ h, through the denitration of denitrification apparatus 2, the dedusting of electric cleaner 4 and the desulfurization of desulfurizer 6 after, i.e. the porch of PPCP reactors 7
Flue-gas temperature is 50oC, water capacity is 10%, SO in flue gas2、NOxIt is respectively 108mg/m with dust concentration3、140 mg/m3With
21.5 mg/m3, SO after being processed through PPCP reactors 72、NOx99%, 65.7% and 80.3% can be reached respectively with dust clearance,
PPCP reactors 7 export each material concentration can reach minimum discharge standard.The wastewater flow rate that PPCP reactors 7 are produced is 14.4t/
H, pH are about 6.5, in faintly acid, SO in waste water4 2−Content is 3400mg/L, NO3 −Content is 4400 mg/L, through nanofiltration membrane component
It is 85% ~ 95% that Water Sproading rate is produced in the nanofiltration obtained after 15 treatment, produces water salt content and is less than 1000mg/L.Salt content in nanofiltration concentrated water
It is 50000 ~ 150000mg/L, concentrated water yield is the 5 ~ 15% of raw water inflow.The reverse osmosis obtained after the treatment of reverse osmosis membrane assembly 20
It is 80 ~ 85% to produce Water Sproading rate thoroughly, produces water salt content and is less than 50mg/L.Nanofiltration concentrated water enters multiple-effect evaporation crystal system 23, crystallization
System uses fractional crystallization technique, final to obtain sulfate and nitrate of the purity more than 95%.
Specific embodiment described in text is only to the spiritual explanation for example of the present invention.The technical field of the invention
Technical staff described specific embodiment can be made it is various modification supplement or using similar mode substitute,
But without departing from spirit of the invention or surmount scope defined in appended claims.
Claims (6)
1. a kind of flue gas integrated purification system for realizing wastewater zero discharge, including exhaust gas integration processing unit, water supply installation,
Wastewater treatment equipment, it is characterised in that the exhaust gas integration processing unit includes high-pressure discharging device, PPCP reactors（7）；
The water supply installation includes supply tank（14）, discharge casing（9）, cyclic water tank（10）, lye tank（13）, some waste water current limlitings
Valve（8）, some liquid pumps（12）And filter（11）；
The wastewater treatment equipment includes tube type filter membrance component（15）, micro-filtration produce water tank（16）, cartridge filter（17）, nanofiltration
Membrane module（18）, nanofiltration produce water tank（19）, reverse osmosis membrane assembly（20）, reverse osmosis concentrated water tank（21）, nanofiltration concentrated water case（22）, it is many
Effect evaporated crystallization device（23）, reverse osmosis produced water tank（24）；
Using the above-mentioned flue gas integrated purification system for realizing wastewater zero discharge, the waste water produced in PPCP reactor runnings
Zero-emission is realized by the way of concentration plus evaporative crystallization, carrying out practically step is as follows：
The flue gas that a, boiler are produced sequentially passes through denitrification apparatus, electric cleaner, desulfurizer, PPCP reactors, most afterwards through chimney
Discharge, a large amount of waste water are produced in PPCP reactor runnings；
The waste water that b, PPCP reactor are produced enters discharge casing through the pipeline with waste water flow-limiting valve, and discharge casing plays depositing for waste water
Storage and the effect for precipitating；
C, oil removal is removed using tube type filter membrance component depth, after micro-filtration produces water through cartridge filter, into nanofiltration membrane component,
Sulfate is retained；
D, nanofiltration produce water and enter reverse osmosis membrane assembly, the most of salt contained in retention waste water；
E, reverse osmosis concentrated water are back to nanofiltration system and continue cycling through treatment, and reverse osmosis produced water is back to PPCP reactor spray groups
The spray process and system supply water of part；
F, nanofiltration concentrated water are processed through multiple-effect evaporation crystal system, and use fractional crystallization technique by the sulfate and nitric acid in waste water
Salt out, so as to realize the zero-emission of flue gas integrated purification system waste water.
2. the flue gas integrated purification system for realizing wastewater zero discharge according to claim 1, it is characterised in that the height
Press the negative pole and PPCP reactors of electric installation（7）Corona wire is connected, and the positive pole of high-pressure discharging device is connected ground connection with dust collecting electrode.
3. the flue gas integrated purification system for realizing wastewater zero discharge according to claim 1, it is characterised in that the confession
Water installations, wherein discharge casing（9）Communication loop water tank（10）；Cyclic water tank（10）Two liquid pumps, one of liquid are connected simultaneously
Pump（12）Connection filter（11）, filter（11）PPCP reactors are communicated to again（7）, another liquid pump（12）Connection lye tank
（13）；The supply tank（14）Connect the 3rd liquid pump（12）, the 3rd liquid pump（12）PPCP reactors are communicated to again（7）.
4. the flue gas integrated purification system for realizing wastewater zero discharge according to claim 3, it is characterised in that the row
Water tank（9）With PPCP reactors（7）Between be provided with waste water flow-limiting valve（8）；The discharge casing（9）With cyclic water tank（10）Between
It is provided with waste water flow-limiting valve（8）；The cyclic water tank（10）And lye tank（13）Inside it is provided with automatic stirrer.
5. the flue gas integrated purification system for realizing wastewater zero discharge according to claim 1, it is characterised in that described useless
Water treatment facilities, wherein tube type filter membrance component（15）, micro-filtration produce water tank（16）, cartridge filter（17）, nanofiltration membrane component
（18）, nanofiltration produce water tank（19）, reverse osmosis membrane assembly（20）, reverse osmosis concentrated water tank（21）It is sequentially communicated；Shown reverse osmosis concentrated water
Case（21）Again water tank is produced with micro-filtration（16）Connection；Shown nanofiltration membrane component（18）, nanofiltration concentrated water case（22）, multiple-effect evaporation crystallization dress
Put（23）, reverse osmosis produced water tank（24）It is sequentially communicated；The reverse osmosis membrane assembly（20）And and reverse osmosis produced water tank（24）Connection.
6. the flue gas integrated purification system for realizing wastewater zero discharge according to claim 1 or 4 or 5, it is characterised in that
Discharge casing in the water supply installation（9）With the tube type filter membrance component in the wastewater treatment equipment（15）Between be connected with liquid
Pump（12）；The reverse osmosis produced water tank of the wastewater treatment equipment（24）With the supply tank in the water supply installation（14）Connection.
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Inventor after: Shi Xiaodong Inventor after: Xi Yongxin Inventor after: Liang Yongge Inventor after: Tang Xuanlin Inventor before: Weng Shan Inventor before: Shi Xiaodong Inventor before: Xi Yongxin Inventor before: Liang Yongge Inventor before: Tang Xuanlin |
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Application publication date: 20170613 |