CN207002499U - Thermal power plant's high slat-containing wastewater processing unit - Google Patents
Thermal power plant's high slat-containing wastewater processing unit Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000012267 brine Substances 0.000 claims abstract description 39
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 39
- 239000013505 freshwater Substances 0.000 claims abstract description 30
- 238000002425 crystallisation Methods 0.000 claims abstract description 25
- 230000008025 crystallization Effects 0.000 claims abstract description 25
- 150000003839 salts Chemical class 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 239000010802 sludge Substances 0.000 claims abstract description 18
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 238000004821 distillation Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 97
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 56
- 239000007788 liquid Substances 0.000 claims description 36
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 28
- 239000006228 supernatant Substances 0.000 claims description 28
- 239000012266 salt solution Substances 0.000 claims description 23
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 22
- 239000000920 calcium hydroxide Substances 0.000 claims description 22
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 22
- 238000001556 precipitation Methods 0.000 claims description 22
- 238000004062 sedimentation Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 17
- 238000001764 infiltration Methods 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 17
- 239000003814 drug Substances 0.000 claims description 15
- 230000008595 infiltration Effects 0.000 claims description 15
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 11
- 239000013049 sediment Substances 0.000 claims description 11
- 238000001640 fractional crystallisation Methods 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 7
- 238000011033 desalting Methods 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 6
- 239000012895 dilution Substances 0.000 claims description 6
- 238000009738 saturating Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 3
- WJEIYVAPNMUNIU-UHFFFAOYSA-N [Na].OC(O)=O Chemical compound [Na].OC(O)=O WJEIYVAPNMUNIU-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 208000028659 discharge Diseases 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- -1 and content is high Chemical compound 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-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
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009292 forward osmosis Methods 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- RECVMTHOQWMYFX-UHFFFAOYSA-N oxygen(1+) dihydride Chemical compound [OH2+] RECVMTHOQWMYFX-UHFFFAOYSA-N 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Field of waste water treatment is the utility model is related to, discloses thermal power plant's high slat-containing wastewater processing unit.The wastewater treatment equipment includes：Wastewater Pretreatment unit (A), film upgrading unit (B) and evaporative crystallization unit (C), wherein, Wastewater Pretreatment unit (A) is used to filter thermal power plant's high slat-containing wastewater, soften, and obtains softened water and sludge；Film upgrading unit (B) is connected with Wastewater Pretreatment unit (A), for the softened water to be carried out into concentration decrement, obtains strong brine and fresh water production water；Evaporative crystallization unit (C) is connected with film upgrading unit (B), for the strong brine to be carried out into Crystallization Separation, obtains crystal salt and distillation aquatic products water.The device can reduce fouling, have the advantages of simple in construction, easy to operate, energy consumption is low, evaporated water is big, energy-conserving and environment-protective, cost of investment are low and operating cost is low.
Description
Technical field
It the utility model is related to field of waste water treatment, and in particular to thermal power plant's high slat-containing wastewater processing unit.
Background technology
Wastewater zero discharge refer to by the salt content of waste water and pollutant it is highly concentrated realize fresh water reuse, solid outward transport, nothing
Any waste liquid discharges factory.Salt and pollutant in water discharge factory by condensing crystallizing and send destructor plant to fill out in solid form
Bury or reclaimed as useful industrial chemicals.
The domestic processing to waste water at present, for example coal-burning power plant's high slat-containing wastewater is (with desulfurization wastewater, water process and precision processing
Regenerative wastewater is representative) processing be still in the starting stage, domestic full factory's near-zero release project is using hot method to tail end height
Brine waste is handled, domestic without application and popularization on a large scale at home because cost of investment and operating cost are higher
Partial fuel coal power plant carries out wastewater treatment using reverse osmosis membrane technology, but reverse osmosis process cost of investment is larger, operating cost
Height, often handling 1 ton of brine waste needs to spend the operating cost of members up to a hundred, is not of practical significance for extensive implementation.
Foreign countries carry out high slat-containing wastewater processing using membrane technology and are concentrated mainly on percolate, wastewater from chemical industry, pharmacy, fruit juice industry,
But not yet it is related in coal-burning power plant high slat-containing wastewater field.
The waste water that desulfurization wastewater treatment system special disposal desulfurization island is discharged.Water in desulfurizer is constantly circulating
During, can enriching heavy metal ion and Cl-Ion etc., with slurries, being continuously increased for these ions will produce to desulphurization system
Raw certain influence：On the one hand accelerate the corrosion of desulphurization plant, on the other hand influence the quality of gypsum.Therefore, desulfurizer will be arranged
Put a certain amount of waste water, i.e. desulfurization wastewater.
In addition to desulfurization wastewater, the current main high slat-containing wastewater in domestic coal-burning power plant also has water process regenerative wastewater, at essence
Regenerative wastewater, desalinization concentrated water etc. are managed, this effluent part its salt content compared with desulfurization wastewater is higher, but heavy metal contains
Amount, suspension, COD, ammonia nitrogen are much lower compared with desulfurization wastewater, therefore handle it mainly concentration and recovery utilization.
Using the power plant desulfurization wastewater total salt quantity (TDS) of lime stone-gypsum wet desulphurization typically in 20000~30000mg/L,
Wherein chlorion about 10000mg/L, sulfate radical about 2000mg/L, 1500~6000mg/L of sodium ion, total hardness about 10000~
20000mg/L is (with CaCO3Meter), 20000~60000mg/L of suspension, also containing the huge sum of money such as a small amount of mercury, cadmium, lead in waste water
Belong to ion, if in flue gas desulfurization technique upstream, be equipped with SCR (SCR) denitrating technique, then also in waste water
It there may exist unreacted ammonia.
At present, the characteristic that thermal power plant's high slat-containing wastewater has is：1) waste water is in faintly acid, and pH is typically between 4~6；2)
A large amount of suspensions, main suspension are gypsum particle, silica and iron, the hydroxide of aluminium；3) the main sun in waste water
Ion is the hardness ionses such as calcium, magnesium, and content is high, and iron, aluminium equal size are also higher, and other heavy metal ion contents are not high, but far
Far above GB8978-1996《Integrated wastewater discharge standard》Limit value；4) anion mainly has Cl in waste water-, SO4 2-、SO3 2-、F-
Deng these ions are mainly derived from coal and limestone mine.
Comprehensive analysis, thermal power plant's high slat-containing wastewater have the characteristics of high saliferous, high rigidity, and zero discharge treatment is very difficult,
In traditional technique, it is difficult to isolate the suspension and salinity in waste water, it is also difficult to produce it is pure, can be with the water of reuse.
In existing technology, even with film concentration, crystallization technique, but operating cost is big, and cost of investment is big, also exists seriously
Scale problems, it is quite big for steam, the consumption of electric power equal energy source, do not save also not environmentally.
Utility model content
The defects of the purpose of this utility model is to overcome existing thermal power plant's high slat-containing wastewater processing unit to exist, carries
For a kind of thermal power plant's high slat-containing wastewater processing unit, the device can reduce fouling, have simple in construction, easy to operate, energy consumption
The advantages of low, evaporated water is big, energy-conserving and environment-protective, cost of investment are low and operating cost is low.
To achieve these goals, the utility model provides a kind of thermal power plant's high slat-containing wastewater processing unit, wherein, should
Wastewater treatment equipment includes：Wastewater Pretreatment unit, film upgrading unit and evaporative crystallization unit, wherein, Wastewater Pretreatment unit
For being filtered, being softened by thermal power plant's high slat-containing wastewater, softened water and sludge are obtained；Film upgrading unit and Wastewater Pretreatment list
Member is connected, and for the softened water to be carried out into concentration decrement, obtains strong brine and fresh water production water；Evaporative crystallization unit and film are dense
Contracting unit is connected, and for the strong brine to be carried out into Crystallization Separation, obtains crystal salt and distillation aquatic products water.
Preferably, the Wastewater Pretreatment unit includes：Raw water sedimentation basin, one-level pliable cell, secondary softening unit and
Soften precipitation unit；Wherein, raw water sedimentation basin is used to thermal power plant's high slat-containing wastewater carrying out standing separation of solid and liquid, obtains on first
Clear liquid and the first sediment；One-level pliable cell is connected with raw water sedimentation basin, for first supernatant and will contain hydrogen
The medicament of calcium oxide is reacted, and obtains the first waste water；Secondary softening unit is connected with one-level pliable cell, for by described in
First waste water is reacted with the medicament containing flocculant and sodium carbonate, obtains the second waste water；Soften precipitation unit and two level is soft
Change unit to be connected, for second waste water progress separation of solid and liquid to be obtained into the second supernatant, the softened water, and discharge institute
State sludge.
Preferably, one-level pliable cell includes：One-level softening reactor, calcium hydroxide agitator tank and calcium hydroxide storage tank；
Wherein, one-level softening reactor is connected with raw water sedimentation basin；Wherein, calcium hydroxide agitator tank and one-level softening reactor and hydrogen
Calcium oxide storage tank is connected, and for part second supernatant to be diluted into the calcium hydroxide from calcium hydroxide storage tank, and adds
Enter and reacted in one-level softening reactor with first supernatant；Secondary softening unit includes：Secondary softening reactor, flocculant
Agitator tank, flocculant storage tank, sodium carbonate agitator tank and sodium carbonate storage tank；Wherein, secondary softening reactor reacts with one-level softening
Device is connected；Wherein, flocculant agitator tank is connected with secondary softening reactor and flocculant storage tank, for by part described
Two supernatants dilute the flocculant from flocculant storage tank, and add secondary softening reactor；Wherein, sodium carbonate agitator tank and two
Level softening reactor is connected with sodium carbonate storage tank, for part second supernatant to be diluted into the carbon from sodium carbonate storage tank
Sour sodium, and add secondary softening reactor.
Preferably, softening precipitation unit includes：Soften sedimentation basin, precipitation concentration pond, sludge dewatering equipment and Weak Acid Ion to hand over
Parallel operation；Softening sedimentation basin is connected with secondary softening reactor, for second waste water to be carried out into precipitation separation, obtains described
Second supernatant and the second sediment；Weak Acid Ion exchanger is connected with softening sedimentation basin, for by part described second
Clear liquid is adjusted to neutral and scale removal, obtains the softened water；Second sediment is successively by precipitation concentration pond, sludge dewatering equipment
Afterwards, turn into the sludge to be transported outward.
Preferably, the film upgrading unit includes：First-stage reverse osmosis unit, two-pass reverse osmosis unit and positive permeation unit；
Wherein, first-stage reverse osmosis unit is connected with the softened water of Wastewater Pretreatment unit, subtracts for the softened water to be carried out into concentration
Amount, obtains first-stage reverse osmosis fresh water and first-stage reverse osmosis concentrated water；Two-pass reverse osmosis unit is connected with first-stage reverse osmosis unit, uses
In the first-stage reverse osmosis fresh water is carried out into concentration decrement, fresh water production water and two-pass reverse osmosis concentrated water are obtained；Positive permeation unit with
First-stage reverse osmosis unit, two-pass reverse osmosis unit are connected, for by the first-stage reverse osmosis concentrated water and the two-pass reverse osmosis
Concentrated water carries out concentration decrement, obtains just permeating fresh water and strong brine, wherein, the positive infiltration fresh water is passed through the two-pass reverse osmosis
Unit carries out concentration decrement.
Preferably, first-stage reverse osmosis unit includes the first-stage reverse osmosis feed-water tank and first-stage reverse osmosis device being connected,
The softened water is passed through after first-stage reverse osmosis feed-water tank to be passed through first-stage reverse osmosis device and carries out concentration decrement again；Two-pass reverse osmosis
Unit includes the two-pass reverse osmosis water tank and second level reverse osmosis apparatus being connected, and the first-stage reverse osmosis fresh water is passed through two level reverse osmosis
Second level reverse osmosis apparatus is passed through after permeable case again and carries out concentration decrement；Positive permeation unit includes the positive permeability apparatus being connected and just
Permeate concentrated water water tank, the first-stage reverse osmosis concentrated water and the two-pass reverse osmosis concentrated water, which are passed through positive permeability apparatus and carry out concentration, to be subtracted
Amount, obtains just permeate concentrated water and the positive infiltration fresh water, the positive infiltration concentrated water be passed through just permeate concentrated water water tank obtain it is described dense
Salt solution, meanwhile, the positive infiltration fresh water is passed through two-pass reverse osmosis water tank.
Preferably, the evaporative crystallization unit includes：Strong brine surge tank, crystallizer, heat exchanger and fractional crystallization unit；
Wherein, strong brine surge tank is connected with the strong brine of film upgrading unit, for the strong brine to be entered into row buffering, obtains pressure
Stable strong brine；Crystallizer is connected with strong brine surge tank, for the stable strong brine of the pressure to be concentrated by evaporation, obtains
To evaporation water and high concentration salt solution；Heat exchanger is connected with crystallizer, for by the evaporation water and the part high salt concentration
Water carries out heat exchange, obtains distilling the high concentration salt solution of aquatic products water and heating, and the high concentration salt solution of heating passes through in crystallizer
The water return outlet in portion is recycled back to crystallizer；Fractional crystallization unit is connected with crystallizer, for consolidating to part high concentration salt solution
Liquid separates, and obtains crystal salt and desalting liquids.
Preferably, the fractional crystallization unit includes：Crystallize cooling tank and solid-liquid separator；Wherein, crystallize cooling tank with
Crystallizer is connected, for by part high salt concentration water cooling, the high concentration salt solution cooled down；Solid-liquid separator is cold with crystallizing
But tank is connected, and for the high concentration salt solution of cooling to be carried out into separation of solid and liquid, obtains crystal salt and desalting liquids.
Preferably, demister is installed at the top of the crystallizer.
Preferably, the open up angle and the angle α of crystallizer main body inner wall of the crystallizer water return outlet are 30 °~45 °.
According to device described in the utility model, in Wastewater Pretreatment unit, by adding sodium carbonate, flocculant, hydrogen
Calcium oxide, ion exchange resin, antisludging agent and hydrochloric acid, so that thermal power plant's high slat-containing wastewater fully softens, effectively remove waste water
In hardness ions, such as Ca2+、Mg2+、SO4 2-、SO3 2-Deng, and heavy metal ion, good fortune is provided for film upgrading unit
Row condition, the generation of fouling can also be reduced.
According to device described in the utility model, in film upgrading unit by increasing positive permeability apparatus, correspondingly reduce anti-
Permeability apparatus, it is possible to reduce the use of high-pressure pump, substantially reduce system energy consumption, reduce pollution and fouling, make system safer
Reliably.
Brief description of the drawings
Fig. 1 is the flow chart of thermal power plant's high slat-containing wastewater processing unit；
Fig. 2 is the device flow chart of Wastewater Pretreatment unit；
Fig. 3 is the device flow chart of film upgrading unit；
Fig. 4 is the device flow chart of evaporative crystallization unit.
Description of reference numerals
A, Wastewater Pretreatment unit B, film upgrading unit
C, evaporative crystallization unit I, one-level pliable cell
II, secondary softening unit III, softening precipitation unit
IV, first-stage reverse osmosis unit V, two-pass reverse osmosis unit
VI, positive permeation unit VII, fractional crystallization unit
1st, calcium hydroxide storage tank 2, flocculant storage tank
3rd, sodium carbonate storage tank 4, calcium hydroxide agitator tank
5th, flocculant agitator tank 6, sodium carbonate agitator tank
7th, raw water sedimentation basin 8, one-level softening reactor
9th, secondary softening reactor 10, softening sedimentation basin
11st, precipitation concentration pond 12, sludge dewatering equipment
13rd, Weak Acid Ion exchanger 14, first-stage reverse osmosis feed-water tank
15th, first-stage reverse osmosis device 16, two-pass reverse osmosis water tank
17th, second level reverse osmosis apparatus 18, positive permeability apparatus
19th, concentrated water water tank 20, strong brine surge tank are just permeated
21st, crystallizer 22, heat exchanger
23rd, cooling tank 24, solid-liquid separator are crystallized
25th, demister
Embodiment
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The utility model provides a kind of thermal power plant's high slat-containing wastewater processing unit, as shown in figure 1, the wastewater treatment equipment
Including：Wastewater Pretreatment unit A, film upgrading unit B and evaporative crystallization unit C, wherein, Wastewater Pretreatment unit A is used for fire
Power plant's high slat-containing wastewater is filtered, softened, and obtains softened water and sludge；Film upgrading unit B is connected with Wastewater Pretreatment unit A
It is logical, for the softened water to be carried out into concentration decrement, obtain strong brine and fresh water production water；Evaporative crystallization unit C and film concentration are single
First B is connected, and for the strong brine to be carried out into Crystallization Separation, obtains crystal salt and distillation aquatic products water.
In the utility model, as shown in Fig. 2 Wastewater Pretreatment unit A includes：Raw water sedimentation basin 7, one-level pliable cell
I, secondary softening unit II and softening precipitation unit III.
In the utility model, raw water sedimentation basin 7 is used to thermal power plant's high slat-containing wastewater carrying out standing separation of solid and liquid, obtains
First supernatant and the first sediment.
In the utility model, one-level pliable cell I is connected with raw water sedimentation basin 7, for by first supernatant
Reacted with the medicament containing calcium hydroxide, obtain the first waste water.
In the utility model, secondary softening unit II is connected with one-level pliable cell I, for by first waste water
Reacted with the medicament containing flocculant and sodium carbonate, obtain the second waste water.
In the utility model, softening precipitation unit III is connected with secondary softening unit II, for described second to be given up
Water carries out separation of solid and liquid and obtains the second supernatant, the softened water, and discharges the sludge.
In the utility model, as shown in Fig. 2 one-level pliable cell I includes：One-level softening reactor 8, calcium hydroxide stir
Mix tank 4 and calcium hydroxide storage tank 1.
In the utility model, one-level softening reactor 8 is connected with raw water sedimentation basin 7.
In the utility model, calcium hydroxide agitator tank 4 softens reactor 8 with one-level and calcium hydroxide storage tank 1 is connected,
For part second supernatant to be diluted into the calcium hydroxide from calcium hydroxide storage tank 1, and add one-level softening reactor 8
In with first supernatant react.
In the utility model, as shown in Fig. 2 secondary softening unit II includes：Secondary softening reactor 9, flocculant stir
Mix tank 5, flocculant storage tank 2, sodium carbonate agitator tank 6 and sodium carbonate storage tank 3.
In the utility model, secondary softening reactor 9 is connected with one-level softening reactor 8.
In the utility model, flocculant agitator tank 5 is connected with secondary softening reactor 9 and flocculant storage tank 2, is used for
By the part flocculant of the second supernatant dilution from flocculant storage tank 2, and add secondary softening reactor 9.
According to the utility model, flocculant can be the conventional organic or inorganic flocculant in this area, it is preferable that flocculant
For the one or more in aluminium polychloride, polyaluminium sulfate, poly-ferric chloride and bodied ferric sulfate.
In the utility model, sodium carbonate agitator tank 6 is connected with secondary softening reactor 9 and sodium carbonate storage tank 3, is used for
By the part sodium carbonate of the second supernatant dilution from sodium carbonate storage tank 3, and add secondary softening reactor 9.Sodium carbonate
The generation of fouling can be reduced, meets just permeating the requirement for pending waste water.
In the utility model, after the medicament in flocculant agitator tank 5 can mix with the medicament in sodium carbonate agitator tank 6
It is common to add secondary softening reactor 9, or the medicament in the flocculant agitator tank 5 and the medicament in sodium carbonate agitator tank 6
It is separately added into secondary softening reactor 9.In the case of the utility model is preferable, medicament in the flocculant agitator tank 5 with
Medicament in sodium carbonate agitator tank 6 is separately added into secondary softening reactor 9.
In the utility model, as shown in Fig. 2 softening precipitation unit III includes：Soften sedimentation basin 10, precipitation concentration pond
11st, sludge dewatering equipment 12 and Weak Acid Ion exchanger 13.
In the utility model, softening sedimentation basin 10 is connected with secondary softening reactor 9, for by second waste water
Precipitation separation is carried out, obtains second supernatant and the second sediment.According to dilution needs, the supernatant of part second enters hydrogen
Calcium oxide agitator tank 4, flocculant agitator tank 5 and sodium carbonate agitator tank 6, for diluting the medicament in calcium hydroxide storage tank 1, flocculation
The medicament in medicament and sodium carbonate storage tank 3 in agent storage tank 2.The supernatant of part second enters Weak Acid Ion exchanger 13.
In the utility model, Weak Acid Ion exchanger 13 is connected with softening sedimentation basin 10, for by part described the
Two supernatants are adjusted to neutral and scale removal, obtain the softened water.
In situations where it is preferred, the filling of the inside of Weak Acid Ion exchanger 13 contains ion exchange resin, hydrochloric acid and antisludging agent
Liquid.Weak Acid Ion exchanger 13 can effectively reduce the hardness in waste water, reduce apparatus structure, ensure counter-infiltration and just ooze
Saturating safe and stable arrangement operation.
According to the utility model, antisludging agent can be PBTCA, polyacrylic acid PAA and one kind or more in multiple copolymer
Kind.
In the utility model, second sediment after precipitation concentration pond 11, sludge dewatering equipment 12, turns into successively
The sludge is transported outward.Wherein, the second sediment carries out precipitation separation, the 3rd isolated supernatant in precipitation concentration pond 11
Liquid enters raw water sedimentation basin 7, and the 3rd isolated sediment enters sludge dewatering equipment 12.
In the utility model, as shown in figure 3, film upgrading unit B includes：First-stage reverse osmosis unit IV, two-pass reverse osmosis
Unit V and positive permeation unit VI.
In the utility model, first-stage reverse osmosis unit IV is connected with Wastewater Pretreatment unit A softened water, for inciting somebody to action
The softened water concentration decrement, obtains first-stage reverse osmosis fresh water and first-stage reverse osmosis concentrated water.
In the utility model, two-pass reverse osmosis unit V is connected with first-stage reverse osmosis unit IV, for by the one-level
Reverse osmosis freshwater carries out concentration decrement, obtains fresh water production water and two-pass reverse osmosis concentrated water.
In the utility model, positive permeation unit VI is connected with first-stage reverse osmosis unit IV, two-pass reverse osmosis unit V,
For the first-stage reverse osmosis concentrated water and the two-pass reverse osmosis concentrated water to be carried out into concentration decrement, obtain just permeating fresh water and just ooze
Saturating concentrated water.
In the utility model, the positive infiltration fresh water is passed through the two-pass reverse osmosis unit V and carries out concentration decrement.
In the utility model, as shown in figure 3, first-stage reverse osmosis unit IV includes the first-stage reverse osmosis feedwater water being connected
Case 14 and first-stage reverse osmosis device 15, the softened water is passed through after first-stage reverse osmosis feed-water tank 14 is passed through first-stage reverse osmosis dress again
Put 15 and carry out concentration decrement.First-stage reverse osmosis feed-water tank 14 can play cushioning effect to first-stage reverse osmosis unit I, be high pressure
Water pump provides water source.After first-stage reverse osmosis and/or two-pass reverse osmosis, it usually needs using the higher pump of pressure, but just
Permeability apparatus can also effectively remove the dissolving salt in waste water, have the advantages of system energy consumption is low without high-pressure pump.
In the utility model, two-pass reverse osmosis unit V includes the two-pass reverse osmosis water tank 16 and two level reverse osmosis being connected
Saturating device 17, the first-stage reverse osmosis fresh water be passed through after two-pass reverse osmosis water tank 16 be passed through again second level reverse osmosis apparatus 17 carry out it is dense
Reduction.Two-pass reverse osmosis water tank 16 can play cushioning effect to two-pass reverse osmosis unit II, provide water source for high-pressure hydraulic pump.
Positive permeation unit VI includes the positive permeability apparatus 18 being connected and positive infiltration concentrated water water tank 19, the first-stage reverse osmosis
Concentrated water and the two-pass reverse osmosis concentrated water are passed through positive permeability apparatus 18 and carry out concentration decrement, obtain just permeating concentrated water and described just ooze
Saturating fresh water, the positive infiltration concentrated water are passed through positive infiltration concentrated water water tank 19 and obtain the strong brine, meanwhile, the positive infiltration fresh water leads to
Enter two-pass reverse osmosis water tank 16.Contain pellicle in positive permeability apparatus and draw liquid, the irreversible pollution of forward osmosis membrane and fouling
Tendency is lower than high pressure counter-infiltration system, and system is relatively reliable, device more energy-conserving and environment-protective.
In the utility model, as shown in figure 4, evaporative crystallization unit C includes：Strong brine surge tank 20, crystallizer 21, change
Hot device 22 and fractional crystallization unit VII.
In the utility model, strong brine surge tank 20 is connected with the strong brine of evaporative crystallization unit B, for by described in
Strong brine enters row buffering, obtains the stable strong brine of pressure.
In the utility model, crystallizer 21 is connected with strong brine surge tank 20, for the pressure is smoothly dense
Salt solution is concentrated by evaporation, and obtains evaporation water and high concentration salt solution.
In the utility model, heat exchanger 22 is connected with crystallizer 21, for by the evaporation water and the part height
Concentration salt solution carries out heat exchange, obtains distilling the high concentration salt solution of aquatic products water and heating, and the high concentration salt solution of heating passes through knot
The water return outlet at the brilliant middle part of device 21 is recycled back to crystallizer 21.
The heat exchanger 22 can be the various conventional heat exchangers in this area.In the case of the utility model is preferable, change
Hot device 22 is shell-and-tube heat exchanger.
In situations where it is preferred, the outlet pipe of the tube-side inlet of heat exchanger 22 and the high concentration salt solution of the bottom of crystallizer 21 connects
Logical, the tube side outlet of heat exchanger 22 is connected with the water return outlet at the middle part of crystallizer 21, shell side inlet and the crystallizer 21 of heat exchanger 22
The evaporation water delivery port connection at top, the shell-side outlet discharge distillation aquatic products water of heat exchanger 22.In heat exchanger 22, crystallizer 21
The evaporation water at top in heat exchanger 22 be cooled, release heat, as distillation aquatic products water discharge, the bottom of crystallizer 21 it is highly concentrated
Spend the inside that Saline Absorbent heat Posterior circle returns crystallizer 21.Thermal source of the heat of steam as crystallization heater, reduces steaming
The usage amount of vapour, reduces energy consumption.Distillation aquatic products water is available for enterprise's reuse, realizes water reuse, reduces the consumption of freshwater resources,
More energy-conserving and environment-protective.
In the utility model, fractional crystallization unit VII is connected with crystallizer 21, for entering to part high concentration salt solution
Row separation of solid and liquid, obtains crystal salt and desalting liquids.
In the utility model, fractional crystallization unit VII includes：Crystallize cooling tank 23 and solid-liquid separator 24.
In the utility model, crystallization cooling tank 23 is connected with crystallizer 21, for by part high salt concentration water cooling,
The high concentration salt solution cooled down.
According to the utility model, crystallization cooling tank 23 can be the various conventional cooling tanks in this area.Preferably, crystallize cold
But tank 23 is coil pipe cooling tank.
In the utility model, solid-liquid separator 24 is connected with crystallization cooling tank 23, for by the high salt concentration of cooling
Water carries out separation of solid and liquid, obtains crystal salt and desalting liquids.
According to the utility model, solid-liquid separator 24 can be the various conventional solid-liquid separators in this area.Preferably, Gu
Liquid/gas separator 24 is centrifuge or filter.It is further preferred that improve magma using hydrocyclone before centrifuge
Concentration.
In situations where it is preferred, in order to which the gas for being mingled with liquid or drop is carried out into depth separation, the particle of attachment
Remove, the top of the crystallizer 21 is provided with demister 25.The demister 25 is the conventional demister in this area, with can
For the purpose of realizing depth separation, limited without special.
In situations where it is preferred, returned for the ease of the high salt concentration water circulation after heating in the main body of crystallizer 21, it is described
The open up angle and the angle α of crystallizer main body inner wall of the water return outlet of crystallizer 21 are 30 °~45 °.
In situations where it is preferred, being provided with compressor between the top exit of crystallizer 21 and heat exchanger 22, tied for heating
The evaporation water at the brilliant top of device 21, reduce the possibility of pipe inner structure.Preferably, compressor is Mechanical Vapor Compression.Machinery steams
Vapour compressor utilizes heat caused by evaporation water, is raised by compression pressure, temperature, heat content increase, improves heat
Efficiency, it is ensured that waste water keeps higher flow velocity in the heater, reduces the possibility of in-tube fouling.In operation, open
Need to introduce liquid in raw steam-heated evaporator during dynamic equipment so that the hard to bear thermal evaporation of waste water energy, when system stable operation
Compressor and heat exchanger is only needed to maintain system institute calorific requirement.
In situations where it is preferred, pump is provided between strong brine surge tank 20 and crystallizer 21, for strong brine to be buffered
Strong brine in tank 20 is pumped to crystallizer 21.
In situations where it is preferred, being provided with strong brine circulating pump between the outlet at bottom of crystallizer 21 and heat exchanger 22, it is used for
High concentration salt solution is pumped to heat exchanger 22.
In situations where it is preferred, in order to detect the concentration of strong brine, concentration detector or ratio are provided with the outlet of crystallizer 21
Re-detection device.Preferably, detector is real-time online detector.
Preferred embodiment of the present utility model described in detail above, still, the utility model is not limited to this.At this
In the range of the technology design of utility model, a variety of simple variants can be carried out to the technical solution of the utility model, including it is each
Technical characteristic is combined with any other suitable method, and these simple variants and combination should equally be considered as the utility model
Disclosure of that, belong to the scope of protection of the utility model.
Claims (10)
1. a kind of thermal power plant's high slat-containing wastewater processing unit, it is characterised in that the wastewater treatment equipment includes：Wastewater Pretreatment list
First (A), film upgrading unit (B) and evaporative crystallization unit (C), wherein,
Wastewater Pretreatment unit (A) is used to filter thermal power plant's high slat-containing wastewater, soften, and obtains softened water and sludge；
Film upgrading unit (B) is connected with Wastewater Pretreatment unit (A), for the softened water to be carried out into concentration decrement, obtains
Strong brine and fresh water production water；
Evaporative crystallization unit (C) is connected with film upgrading unit (B), for the strong brine to be carried out into Crystallization Separation, is tied
Brilliant salt and distillation aquatic products water.
2. wastewater treatment equipment according to claim 1, it is characterised in that the Wastewater Pretreatment unit (A) includes：It is former
Water sedimentation pond (7), one-level pliable cell (I), secondary softening unit (II) and softening precipitation unit (III)；Wherein,
Raw water sedimentation basin (7) is used to thermal power plant's high slat-containing wastewater carrying out standing separation of solid and liquid, obtains the first supernatant and first
Sediment；
One-level pliable cell (I) is connected with raw water sedimentation basin (7), for first supernatant and will contain calcium hydroxide
Medicament is reacted, and obtains the first waste water；
Secondary softening unit (II) is connected with one-level pliable cell (I), for by first waste water with containing flocculant and
The medicament of sodium carbonate is reacted, and obtains the second waste water；
Softening precipitation unit (III) is connected with secondary softening unit (II), for second waste water to be carried out into separation of solid and liquid
The second supernatant, the softened water are obtained, and discharges the sludge.
3. wastewater treatment equipment according to claim 2, it is characterised in that one-level pliable cell (I) includes：One-level softens
Reactor (8), calcium hydroxide agitator tank (4) and calcium hydroxide storage tank (1)；Wherein, one-level softening reactor (8) precipitates with raw water
Pond (7) is connected；
Wherein, calcium hydroxide agitator tank (4) and one-level softening reactor (8) and calcium hydroxide storage tank (1) are connected, for by portion
Point described calcium hydroxide of the second supernatant dilution from calcium hydroxide storage tank (1), and add in one-level softening reactor (8) with
The first supernatant reaction；
Secondary softening unit (II) includes：Secondary softening reactor (9), flocculant agitator tank (5), flocculant storage tank (2), carbonic acid
Sodium agitator tank (6) and sodium carbonate storage tank (3)；Wherein, secondary softening reactor (9) is connected with one-level softening reactor (8)；
Wherein, flocculant agitator tank (5) is connected with secondary softening reactor (9) and flocculant storage tank (2), for by part institute
Flocculant of the second supernatant dilution from flocculant storage tank (2) is stated, and adds secondary softening reactor (9)；
Wherein, sodium carbonate agitator tank (6) is connected with secondary softening reactor (9) and sodium carbonate storage tank (3), for by part institute
Sodium carbonate of the second supernatant dilution from sodium carbonate storage tank (3) is stated, and adds secondary softening reactor (9).
4. wastewater treatment equipment according to claim 2, it is characterised in that softening precipitation unit (III) includes：Softening is heavy
Shallow lake pond (10), precipitation concentration pond (11), sludge dewatering equipment (12) and Weak Acid Ion exchanger (13)；
Softening sedimentation basin (10) is connected with secondary softening reactor (9), for second waste water to be carried out into precipitation separation, obtains
To second supernatant and the second sediment；
Weak Acid Ion exchanger (13) is connected with softening sedimentation basin (10), for part second supernatant to be adjusted into neutrality
And scale removal, obtain the softened water；
Second sediment after precipitation concentration pond (11), sludge dewatering equipment (12), turns into the sludge and transported outward successively.
5. wastewater treatment equipment according to claim 1, it is characterised in that the film upgrading unit (B) includes：One-level is anti-
Permeation unit (IV), two-pass reverse osmosis unit (V) and positive permeation unit (VI)；Wherein,
First-stage reverse osmosis unit (IV) is connected with the softened water of Wastewater Pretreatment unit (A), for the softened water to be carried out
Concentration decrement, obtains first-stage reverse osmosis fresh water and first-stage reverse osmosis concentrated water；
Two-pass reverse osmosis unit (V) is connected with first-stage reverse osmosis unit (IV), for the first-stage reverse osmosis fresh water to be carried out
Concentration decrement, obtains fresh water production water and two-pass reverse osmosis concentrated water；
Positive permeation unit (VI) is connected with first-stage reverse osmosis unit (IV), two-pass reverse osmosis unit (V), for by the one-level
Reverse osmosis concentrated water and the two-pass reverse osmosis concentrated water carry out concentration decrement, obtain just permeating fresh water and strong brine, wherein, it is described just
Infiltration fresh water is passed through the two-pass reverse osmosis unit (V) and carries out concentration decrement.
6. wastewater treatment equipment according to claim 5, it is characterised in that first-stage reverse osmosis unit (IV) includes being connected
First-stage reverse osmosis feed-water tank (14) and first-stage reverse osmosis device (15), the softened water be passed through first-stage reverse osmosis feed-water tank
(14) first-stage reverse osmosis device (15) is passed through after again and carries out concentration decrement；
Two-pass reverse osmosis unit (V) includes the two-pass reverse osmosis water tank (16) and second level reverse osmosis apparatus (17) being connected, described
First-stage reverse osmosis fresh water is passed through after two-pass reverse osmosis water tank (16) to be passed through second level reverse osmosis apparatus (17) and carries out concentration decrement again；
Positive permeation unit (VI) includes the positive permeability apparatus (18) being connected and positive infiltration concentrated water water tank (19), the one-level reverse osmosis
Saturating concentrated water and the two-pass reverse osmosis concentrated water are passed through positive permeability apparatus (18) and carry out concentration decrement, obtain just permeating concentrated water and described
Positive infiltration fresh water, the positive infiltration concentrated water are passed through positive infiltration concentrated water water tank (19) and obtain the strong brine, meanwhile, the positive infiltration
Fresh water is passed through two-pass reverse osmosis water tank (16).
7. wastewater treatment equipment according to claim 1, it is characterised in that the evaporative crystallization unit (C) includes：Dense salt
Water surge tank (20), crystallizer (21), heat exchanger (22) and fractional crystallization unit (VII)；Wherein,
Strong brine surge tank (20) is connected with the strong brine of film upgrading unit (B), for the strong brine to be entered into row buffering, obtains
To the stable strong brine of pressure；
Crystallizer (21) is connected with strong brine surge tank (20), for the stable strong brine of the pressure to be concentrated by evaporation, obtains
To evaporation water and high concentration salt solution；
Heat exchanger (22) is connected with crystallizer (21), for the evaporation water and part the high concentration salt solution to be carried out into heat
Exchange, obtain distilling the high concentration salt solution of aquatic products water and heating, the high concentration salt solution of heating passes through returning in the middle part of crystallizer (21)
The mouth of a river is recycled back to crystallizer (21)；
Fractional crystallization unit (VII) is connected with crystallizer (21), for carrying out separation of solid and liquid to part high concentration salt solution, obtains
Crystal salt and desalting liquids.
8. wastewater treatment equipment according to claim 7, it is characterised in that the fractional crystallization unit (VII) includes：Knot
Brilliant cooling tank (23) and solid-liquid separator (24)；Wherein,
Crystallization cooling tank (23) is connected with crystallizer (21), for by part high salt concentration water cooling, what is cooled down to be highly concentrated
Spend salt solution；
Solid-liquid separator (24) is connected with crystallization cooling tank (23), for the high concentration salt solution of cooling to be carried out into separation of solid and liquid,
Obtain crystal salt and desalting liquids.
9. wastewater treatment equipment according to claim 7, it is characterised in that be provided with and remove at the top of the crystallizer (21)
Day with fog (25).
10. wastewater treatment equipment according to claim 7, it is characterised in that crystallizer (21) water return outlet opens up
The angle α of angle and crystallizer main body inner wall is 30 °~45 °.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108395043A (en) * | 2018-03-29 | 2018-08-14 | 四川高绿平环境科技有限公司 | A kind of organic liquid waste treatment technology |
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