CN104445774B - Wastewater treating device and method - Google Patents
Wastewater treating device and method Download PDFInfo
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- CN104445774B CN104445774B CN201410680191.0A CN201410680191A CN104445774B CN 104445774 B CN104445774 B CN 104445774B CN 201410680191 A CN201410680191 A CN 201410680191A CN 104445774 B CN104445774 B CN 104445774B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000001914 filtration Methods 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 19
- 238000002425 crystallisation Methods 0.000 claims abstract description 16
- 230000008025 crystallization Effects 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims abstract description 15
- 238000001223 reverse osmosis Methods 0.000 claims description 126
- 238000000108 ultra-filtration Methods 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 30
- 238000004065 wastewater treatment Methods 0.000 claims description 26
- 238000001728 nano-filtration Methods 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000000706 filtrate Substances 0.000 claims description 10
- 238000001764 infiltration Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- 230000000844 anti-bacterial effect Effects 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000007790 solid phase Substances 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 4
- 239000008394 flocculating agent Substances 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 230000003534 oscillatory effect Effects 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims 1
- 230000026676 system process Effects 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000000126 substance Substances 0.000 description 11
- 208000028659 discharge Diseases 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000012267 brine Substances 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 241001125847 Tinca Species 0.000 description 1
- 239000005422 algal bloom Substances 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- -1 multimedium Chemical compound 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002918 waste heat Substances 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
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/444—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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a wastewater treating device. The wastewater treating device comprises an adjusting pool, a pipeline mixer, a primary filtering system, a secondary filtering system, a primary reverse osmosing system, a secondary reverse osmosing system and an evaporating and crystallizing system. The invention further discloses a wastewater treating method. By the cooperation treatment of the primary filtering system, the secondary filtering system, the primary reverse osmosing system and the secondary reverse osmosing system, a penetrating fluid accounting for about 88% of the volume of wastewater can be recycled to be used as recycled water, and evaporation and crystallization can be further conducted on the rest few penetrating fluid, so that zero emission treatment of wastewater, particularly wastewater high in salt content, can be realized.
Description
Technical field
The invention belongs to field of industrial waste water treatment is and in particular to a kind of waste water that waste water can be carried out with zero discharge treatment
Processing meanss and method.
Background technology
In recent years, with the fast development of China's oil chemical industry, coal chemical industry, industrial circulating cooling water system, chemistry
Water system, steam generator system construction scale all increasing, therewith produce problem be substantial amounts of discharge of wastewater, this effluent part arrange
High-volume account for the 10%～20% of enterprise water use total amount, and all contain higher salt.Therefore, if will be direct for this effluent part
Discharge will waste substantial amounts of water resource.Additionally, the discharge of high-salt wastewater not only can destroy locality natural water from net energy
Power, also can make a very bad impression to water ecological environment, and saline Land problem may be led to increase.
Increasingly serious with China's water scarcity situation, especially the Green GDP construction advocated energetically of country and
The proposition of recycling economy, makes industrial water saving reduce discharging particularly important with utilization of wastewater resource.Therefore how economical, efficient, reliable
Raising enterprise water resources comprehensive utilization rate be even up to " zero-emission " standard, be enterprise meet country, local government's environmental protection will
Ask, establish the important process that it is vivid that enterprise takes responsibility.
Content of the invention
It is an object of the invention to provide a kind of wastewater treatment equipment and method, to improve wastewater utilization rate, reduce
Discharge of wastewater.
According to an aspect of the present invention, the invention provides a kind of wastewater treatment equipment, described wastewater treatment equipment bag
Include：
Regulating reservoir, for receiving pending waste water and making reception waste water mix homogeneously；
Pipe-line mixer, for making the waste water from described regulating reservoir mix homogeneously with additional flocculating agents and flocculate；
Single filter system, for filtering the floccule body in the waste water of described pipe-line mixer, float and solid phase
Impurity, described single filter system includes mechanical filter and piping filter, and described mechanical filter is used for from described
The waste water of pipe-line mixer is filtered, and described piping filter is used for the filtrate of described mechanical filter is filtered；
Cascade filtration system, described cascade filtration system includes ultrafiltration apparatuss and nanofiltration equipment, and described ultrafiltration apparatuss are used for
Hyperfiltration treatment is carried out to the waste water after processing through described single filter system, described nanofiltration equipment is used for through described ultrafiltration apparatuss
Waste water after process carries out nanofiltration process；
First-stage reverse osmosis system, for carrying out reverse-osmosis treated to the waste water after processing through described cascade filtration system；
Two-stage reverse osmosis system, for carrying out reverse-osmosis treated to the seepage remaining liquid of described first-stage reverse osmosis system；
Evaporation and crystallization system, for being evaporated to the seepage remaining liquid of described two-stage reverse osmosis system crystallizing.
Wastewater treatment equipment according to the present invention is it is preferable that described wastewater treatment equipment also includes product water tank, described product
Product water tank is used for receiving the penetrating fluid of described first-stage reverse osmosis system and two-stage reverse osmosis system.
Wastewater treatment equipment according to the present invention it is preferable that described wastewater treatment equipment also includes heat exchanger, described heat exchange
Device is arranged between described single filter system and cascade filtration system, for adjusting after the process of described single filter system
The temperature of waste water.
Wastewater treatment equipment according to the present invention is it is preferable that described first-stage reverse osmosis system includes：
First booster pump, for being pressurized to the waste water from described cascade filtration system；
First accurate filter, for filtering to the waste water from described first booster pump；
First high-pressure pump, for lifting the pressure of the filtrate of described first cartridge filter；
First reverse osmosis equipment, for carrying out reverse-osmosis treated to the waste water from described first high-pressure pump；
First concentrated water case, for receiving the seepage remaining liquid of described first reverse osmosis equipment.
Described two-stage reverse osmosis system includes：
Second booster pump, for being pressurized to the waste water from described first concentrated water case；
Second accurate filter, for filtering to the waste water from described second booster pump；
Second high-pressure pump, for lifting the pressure of the filtrate of described second cartridge filter；
Second reverse osmosis equipment, for carrying out reverse-osmosis treated to the waste water from described second high-pressure pump；
Second concentrated water case, for receiving the seepage remaining liquid of described second reverse osmosis equipment.
Wastewater treatment equipment according to the present invention is it is preferable that the reverse osmosis membrane that described first reverse osmosis equipment is adopted is
Antipollution complex reverse osmosis membrane；Described second reverse osmosis membrane equipment is disc tube reverse osmosis (dt-ro) film device, oscillatory shear reinforced film sets
Standby or ductwork type reverse osmosis membrane equipment.
According to another aspect of the present invention, present invention also offers a kind of process waste water using above-mentioned wastewater treatment equipment
Method, methods described comprises the steps：
A, waste water introducing regulating reservoir is carried out homogenizing and all measures regulation, add flocculant in the waste water to after adjust and make waste water
Pipe-line mixer is fully flocculated；
B, the waste water being obtained using described mechanical filter and piping filter process step a, to remove the wadding in waste water
Solidifying body, float and solid phase impurity, make delivery turbidity≤5NTU；
C, carry out ultrafiltration using the waste water that described ultrafiltration apparatuss obtain to step b, make ultra-filtration water SDI≤3；Using described
Nanofiltration equipment carries out nanofiltration to described ultra-filtration water, removes in ultra-filtration water more than 80% hardness ions；
D, the waste water that step c is obtained carry out reverse-osmosis treated, and the seepage remaining liquid obtaining after reverse-osmosis treated are steamed
Send out crystallization；TDS≤the 600mg/L of reverse-osmosis treated gained penetrating fluid, is sent to circulation.
Method in accordance with the invention it is preferred that the TDS of described waste water is not less than 1500mg/L, turbidity is not less than 10NTU,
And the COD value of described waste water is not less than 100mg/L；It is further preferred that the TDS of described waste water be 2000mg/L～
6000mg/L, turbidity is 10-25NTU, and the COD value of described waste water is 100-250g/L；It is further preferred that it is described useless
The TDS of water is 3000mg/L～5000mg/L, and turbidity is 15-20NTU, and the COD value of described waste water is 150-200g/L.Root
According to process of the present invention it is preferred that ground, in step c, the waste water that described step b obtains adds antibacterial before carrying out ultrafiltration, described
Antibacterial can be antibacterial commonly used in the art.
Method in accordance with the invention it is preferred that in step c, waste water that described step b obtains is before carrying out ultrafiltration using changing
Hot device adjusts temperature to 5 DEG C -30 DEG C, more preferably 20 DEG C -35 DEG C.
Method in accordance with the invention it is preferred that in step d, the TDS of the penetrating fluid of described first-stage reverse osmosis system≤
500mg/L, yield is the 60%-70% of the wastewater flow that described first-stage reverse osmosis system is processed；Described two-stage reverse osmosis system
Penetrating fluid TDS≤1000mg/L, yield is the 70%-80% of the wastewater flow that described two-stage reverse osmosis system is processed.
Compared with prior art, the present invention passes through joining of single filter system, cascade filtration system and counter-infiltration system
Conjunction is processed, and can reclaim the penetrating fluid accounting for wastewater volume 88% as recirculated water recycling, remaining a small amount of seepage remaining liquid enters
One step carries out evaporative crystallization process, thus realizing waste water, the zero discharge treatment of the particularly higher waste water of salt content, reduces saliferous
The baneful influence to local water environment for the discharge of wastewater, alleviates increasingly serious water scarcity situation simultaneously.
In addition, the present invention further preferably adopts two-pass RO system, when processing waste water, two steps ro can be made
System adopts the low response rate, effectively prevents reverse osmosis membrane surface from concentration polarization phenomenon too early, extends reverse osmosis membrane system
Usage cycles, reduce reverse osmosis equipment stop cleaning frequency.
Additionally, the present invention carried out ultrafiltration and nanofiltration before reverse osmosiss, so that waste water is before entering counter-infiltration system
Hardness reduces more than 80%, significantly reduces concentration polarization phenomenon and the scale effect of the hardness ions on reverse osmosis membrane surface.
Meanwhile, in the whole system of the present invention, investment and operating cost highest part are evaporation and crystallization system, therefore adopt one-level
To reduce the sewage load of evaporation and crystallization system with two-stage reverse osmosis system, with investment reduction and operating cost.Due to two grades
Waste water handled by counter-infiltration system is the seepage remaining liquid of first-stage reverse osmosis system, for this reason, the present invention preferably especially applies rubbish
Reverse osmosis equipment employed in permeated liquid system, and be successfully applied to, in the middle of brine waste process field, efficiently solve and contain
Minimizing processes this technical barrier to salt waste water to greatest extent.Save investment and the fortune of subsequent evaporation crystal system to greatest extent
Row cost.
Brief description
Fig. 1 is the schematic diagram of the wastewater treatment equipment of the present invention.
Specific embodiment
The present invention provides a kind of wastewater treatment equipment, and in the present invention, described wastewater treatment equipment includes regulating reservoir, pipeline
Blender, single filter system, cascade filtration system, first-stage reverse osmosis system, two-stage reverse osmosis system and evaporation and crystallization system.
In the present invention, described regulating reservoir is those known to described in this area, for receiving pending waste water and making
Receive waste water mix homogeneously.
In the present invention, described pipe-line mixer is used for making the waste water from described regulating reservoir mix all with additional flocculating agents
Even and flocculate；Described flocculant be known in the art those, such as aluminum salt flocculant and Ferric Salt Flocculants, preferably aluminium salt
Flocculant, to reduce the pollution to subsequent film processing procedure.Described pipe-line mixer be known in the art those, such as
For nozzle-type, eddy current type, multiaperture-type or different orifice-plate type blender, it is added with waste water entrance blender and the coagulant of flocculant
It is sufficiently mixed, form floccule body, be easy to subsequent mechanical filter and carry out adsorbing, retain, filter.
In the present invention, described single filter system is used for filtering the flocculation in the waste water of described pipe-line mixer
Body, float and solid phase impurity, including mechanical filter and piping filter, described mechanical filter is known in the art
Those, for example, quartz sand, multimedium, activated carbon or manganese sand filter, preferably many media, filters, for from described pipeline
The waste water of blender is filtered, to filter out most float, colloidal substance moreover it is possible to make the COD (chemical oxygen demand of waste water
Amount) value reduction about 10%.Described piping filter can be well known in the art those, for example, Y type or basket filter,
Preferably y-type filter, for filtering to the filtrate of described mechanical filter, prevents the filtrate in small, broken bits of mechanical filter from letting out
The machinery scuffing revealed and subsequent ultrafiltration equipment membrane component is caused.
In the present invention, described cascade filtration system includes ultrafiltration apparatuss and nanofiltration equipment, and it is right that described ultrafiltration apparatuss are used for
Waste water after processing through described single filter system carries out hyperfiltration treatment, and described nanofiltration equipment is used at through described ultrafiltration apparatuss
Waste water after reason carries out nanofiltration process.Described ultrafiltration apparatuss can be known in the art those, such as Tao Shi, GE or east
The commercial ultra-filtration equipment of beautiful company, makes the SDI (pollution index)≤3 of ultra-filtration water, to ensure the normal of follow-up counter-infiltration system
Run；Described nanofiltration equipment be known in the art those, such as the commercially available nanofiltration equipment of Tao Shi, GE or Toray,
So that the total hardness of waste water reduces more than 80%, reduce fouling tendency ion to greatest extent and accumulate and supersaturation in reverse osmosis membrane
Separate out, the long-period stable operation for follow-up reverse osmosis membrane system lays the foundation.
In the present invention, described first-stage reverse osmosis system is used for the waste water after processing through described cascade filtration system is carried out
Reverse-osmosis treated.It is preferably carried out in mode at one, described first-stage reverse osmosis system includes the first booster pump, the first accurate mistake
Filter, the first high-pressure pump, the first reverse osmosis equipment and the first concentrated water case, wherein, described first booster pump is used for from described two
The waste water of level filtration system is pressurized, so that waste water energy obtains enough pressure and filters through described first accurate filter；The
One accurate filter is used for the waste water from described first booster pump being filtered, just to protect described first reverse osmosis equipment
Often run.Described first accurate filter can be known in the art those, be also called cartridge filter, its material for core
Can be sintering chimney filter, fusion-jet type fabric filter element and Nidus Vespae filter element etc., preferably Nidus Vespae filter element, be conveniently replaceable, be conducive to equipment
Operation and Maintenance and management, secondary filter equipment filtering accuracy is 5 μm, is set with preventing large particulate matter from entering described first reverse osmosiss
Standby, protect the reverse osmosis membrane of described first reverse osmosis equipment not scratched by machinery to greatest extent.Described first high-pressure pump is used for
Lift the pressure of the filtrate of described first accurate filter, so that smoothly and carry out reverse-osmosis treated.
Described first reverse osmosis equipment is used for carrying out reverse-osmosis treated to the waste water from described first high-pressure pump.Described
One reverse osmosis equipment can be those reverse osmosis equipments known in the art, such as Tao Shi, section's formula, day east electrician or eastern beautiful public affairs
The commercially available reverse osmosis equipment of department it is preferable that the reverse osmosis membrane that adopted of described first reverse osmosiss is antipollution complex reverse osmosis membrane,
The BW30XFR--400/34i type antipollution complex reverse osmosis membrane of such as Dow Chemical, because waste water is turbid after aforementioned processing
Degree is low, and hardness is low, and TDS (dissolvability solid amount) value is higher, can be met using traditional antipollution complex reverse osmosis membrane
Require.After reverse osmosis deaslination is processed, can contribute to Waste water concentrating to higher concentration so that wastewater flow rate greatly reduces
Reduce scale and the cost of investment of subsequent evaporation crystal system.Described first concentrated water case is used for receiving described first reverse osmosis equipment
Seepage remaining liquid.The penetrating fluid of described first reverse osmosis equipment can utilize directly as the recirculated water in enterprise.
In the present invention, described two-stage reverse osmosis system is used for carrying out reverse osmosis to the seepage remaining liquid of described first counter-infiltration system
Thoroughly process.Preferably, described two-stage reverse osmosis system include the second booster pump, the second accurate filter, the second high-pressure pump, second
Reverse osmosis equipment and the second concentrated water case, wherein, described second booster pump is used for remaining from oozing of described first-stage reverse osmosis system
Liquid is pressurized；Described second accurate filter is used for the waste water from described second booster pump is filtered；Described second
High-pressure pump is used for lifting the pressure of the filtrate of described second accurate filter；Described second reverse osmosis equipment is used for from described
The waste water of the second high-pressure pump carries out reverse-osmosis treated, the second reverse osmosis equipment be known in the art those.Because second is anti-
The water inlet of penetration equipment is the seepage remaining liquid of the first reverse osmosis equipment, and its TDS, hardness Deng Cheng branch are multiplied, in order to more preferable
Ground processes this seepage remaining liquid it is preferable that described second reverse osmosis equipment is the disc tube reverse osmosis (dt-ro) equipment of Pall company of the U.S., the U.S.
Film device or the ductwork type reverse osmosis membrane equipment of German Tenche company are strengthened in the oscillatory shear of New Logic company, above-mentioned set
Although standby be traditionally applied to percolate system, apply it in the middle of brine waste process field, equally permissible
Effectively solving brine waste processes minimizing to greatest extent and processes this technical barrier.Described second concentrated water case is used for receiving described
The seepage remaining liquid of the second reverse osmosis equipment, the penetrating fluid of described second reverse osmosis equipment can be directly as the circulation water conservancy in enterprise
With.
In the present invention, described evaporation and crystallization system is used for making the seepage remaining liquid evaporative crystallization of described two-stage reverse osmosis system,
Described evaporation and crystallization system is known in the art, can be such as crystallizing evaporator or evaporation pond, if enterprise's land used is nervous, can
To be taken up an area with saving equipment from crystallizing evaporator；If enterprise's land used is more, especially Northwest inland area, wasteland is more, gas
Wait drying, preferably use evaporation pond and process seepage remaining liquid.Substantial amounts of afterheat steam is contained in general factory, and described evaporation and crystallization system can
By the use of the low-quality afterheat steam of factory as thermal source, this part of waste heat steam to be introduced evaporation and crystallization system, can substantially reduce
The operating cost of evaporation crystallization equipment.
It is preferably carried out in mode at one, described wastewater treatment equipment also includes heat exchanger, described heat exchanger is arranged on
Between described single filter system and cascade filtration system, to adjust the inflow temperature of described cascade filtration system, such as by institute
The temperature adjustment stating cascade filtration system to 5 DEG C～30 DEG C, preferably 20 DEG C～25 DEG C, to ensure subsequent ultrafiltration, nanofiltration, reverse osmosiss
The normal work of system film device, reduces and filters pressure drop；Described heat exchanger can be known in the art those, such as board-like
Heat exchanger or tubular heat exchanger, preferably plate type heat exchanger.
In one preferred embodiment, described wastewater treatment equipment also includes product water tank, and described product water tank is used
In the penetrating fluid receiving described first-stage reverse osmosis system and two-stage reverse osmosis system, and send as recirculated water.
Present invention also offers a kind of method of wastewater treatment, methods described includes：A, by waste water introducing regulating reservoir carry out all
Matter all measures regulation, adds flocculant and so that waste water is fully flocculated in pipe-line mixer in the waste water to after adjust；B, profit
The waste water being obtained with described mechanical filter and piping filter process step a, with remove the floccule body in waste water, float and
Solid phase impurity, makes delivery turbidity≤5NTU；C, carry out ultrafiltration using the waste water that described ultrafiltration apparatuss obtain to step b, make ultrafiltration
Water outlet SDI≤3；Using described nanofiltration equipment, nanofiltration is carried out to described ultra-filtration water, make ultra-filtration water hardness reduce 80% with
On；D, the waste water that step c is obtained carry out reverse-osmosis treated, and the seepage remaining liquid obtaining after reverse-osmosis treated are evaporated tie
Crystalline substance, the TDS≤1000mg/L of gained penetrating fluid, is sent to circulation.
In the present invention, it is preferred to, the TDS value of described waste water is not less than 1500mg/L, more preferably 2000mg/L
～6000mg/L, still more preferably for 3000mg/L～5000mg/L；The turbidity of described waste water is not less than 10NTU, further
It is preferably 10-25NTU, still more preferably for 15-20NTU, and the COD value of described waste water is not less than 100mg/L, further
It is preferably 100-250mg/L, still more preferably for 150-200mg/L.It will be understood by those skilled in the art that described waste water
These parameters value is less, processes simpler.It is highly preferred that described waste water is the waste water that petrochemical industry or coal chemical industry enterprises are discharged,
Including water in water circulating system with water, chemical water System drainage and steam generator system sewer, wherein chemical water System drainage includes this
The backwashing water of each equipment, such as hyperfiltration reverse-rinsing water, nanofiltration backwash water etc. in the wastewater treatment equipment of invention.
In the present invention, it is preferred to, the reverse-osmosis treated in step d includes a reverse-osmosis treated and to described once anti-
The secondary reverse-osmosis treated that carries out of seepage remaining liquid that infiltration is processed, wherein, the TDS of the penetrating fluid of a described reverse-osmosis treated≤
500mg/L, yield is the 60%-70% of the wastewater flow of a described reverse-osmosis treated；The oozing of described secondary reverse-osmosis treated
TDS≤the 1000mg/L of transparent liquid, yield is the 70%-80% of the wastewater flow that described two-pass reverse osmosis are processed.
In the present invention, it is preferred to, in step c, the waste water that described step b obtains has been also added with sterilization before carrying out ultrafiltration
Agent.Added antibacterial can carry out sterilization processing to waste water before ultra-filtration filters, prevent from being formed carefully after entering ultra-filtration filters
Bacterium, algal bloom grow and ultrafilter membrane are caused dirty stifled, thus affecting exerting oneself of ultrafiltration apparatuss, lead to stop cleaning.Separately
Outward, antibacterial adds after single filter system, so that sterilization and flocculation is separately processed, and prevents flocculant and antibacterial medicament
Influence each other effect and affect the performance of drug effect.It is further preferred that in step c, utilizing heat exchanger before waste water carries out ultrafiltration
Temperature is adjusted to 5 DEG C -30 DEG C, more preferably 20 DEG C -25 DEG C.
Below in conjunction with drawings and Examples, the present invention will be described further.
Embodiment
As shown in figure 1, the wastewater flow of certain enterprise discharge is 200m3/ h, the TDS of described waste water be about 4000mg/L～
5000mg/L, turbidity is about 10-20NTU, and COD value is about 150-200mg/L.Described waste water is firstly introduced into regulating reservoir 1 to be carried out all
Matter all measures regulation, is then sent to be sufficiently mixed with the aluminum salt flocculant adding in pipe-line mixer 2, produces flocculation,
Form bulky grain floccule body, send in single filter system 3 and filtered, through mechanical filter 31 in single filter system 3
Filter, retention more than 99% bulky grain suspended material, more than 80% colloidal substance, delivery turbidity≤5NTU, COD value is about
150mg/L, then goes the removal of impurity further through piping filter 32.Waste water after processing through single filter system 3 enters heat exchange
Device 4 adjusts the temperature to 22 DEG C～25 DEG C, enters cascade filtration system 5, removes surplus in cascade filtration system 5 through ultrafiltration apparatuss 51
Remaining colloidal substance, ultra-filtration water turbidity≤0.5NTU, water outlet SDI≤3, ultra-filtration water enters nanofiltration equipment 52, and nanofiltration makes waste water
Hardness reduce more than 80%.Waste water after removing firmly enters first-stage reverse osmosis system 6, successively through the first booster pump 61, first
Accurate filter 62, the first high-pressure pump 63 enter the first reverse osmosis equipment 64, and the seepage remaining liquid obtaining enters the first concentrated water case 65, its
Middle penetrating fluid accounts for 60%, its TDS≤500mg/L of the waste water cumulative volume entering first-stage reverse osmosis system, and remaining 40% is remaining for oozing
Liquid, its TDS is in 8000mg/L～12000mg/L.Seepage remaining liquid in described first concentrated water case 65 is as two-stage reverse osmosis system 7
Raw water, enters two-stage reverse osmosis system 7 and carries out reverse-osmosis treated, successively through the second booster pump 71, the second accurate filter 72, the
Two high-pressure pump 73 enters the second reverse osmosis equipment 74, and the seepage remaining liquid obtaining enters the second concentrated water case 75, and wherein penetrating fluid accounts for two grades
The 70% of the wastewater volume of counter-infiltration system, its TDS≤1000mg/L, the TDS >=25000mg/L of seepage remaining liquid.Described one-level is anti-
The penetrating fluid of osmosis system and two-stage reverse osmosis system pools together entrance product water tank 9 and makes as recirculated water supply enterprise
With.The comprehensive recovery of above-mentioned waste water is 88%, reclaims water yield 176m3/h.The seepage remaining liquid of described two-stage reverse osmosis system 7 enters one
Step sends into evaporative crystallization in crystallizing evaporator 8, can recycle, thus realizing waste water zero-emission after the steam of gained is condensed
Put.
Claims (8)
1. a kind of wastewater treatment equipment, described wastewater treatment equipment includes：
Regulating reservoir, for receiving pending waste water and making reception waste water mix homogeneously；
Pipe-line mixer, for making the waste water from described regulating reservoir mix homogeneously with additional flocculating agents and flocculate；
Single filter system, for filtering the floccule body in the waste water of described pipe-line mixer, float and solid phase impurity,
Including mechanical filter and piping filter, described mechanical filter is used for the waste water from described pipe-line mixer was carried out
Filter, described piping filter is used for the filtrate of described mechanical filter is filtered；
Cascade filtration system, described cascade filtration system includes ultrafiltration apparatuss and nanofiltration equipment, and described ultrafiltration apparatuss are used for warp
Waste water after described single filter system is processed carries out hyperfiltration treatment, and described nanofiltration equipment is used for processing to through described ultrafiltration apparatuss
Waste water afterwards carries out nanofiltration process；
First-stage reverse osmosis system, for carrying out reverse-osmosis treated to the waste water after processing through described cascade filtration system；Described one
Level counter-infiltration system includes：
First booster pump, for being pressurized to the waste water from described cascade filtration system；
First cartridge filter, for filtering to the waste water from described first booster pump；
First high-pressure pump, for lifting the pressure of the filtrate of described first cartridge filter；
First reverse osmosis equipment, for carrying out reverse-osmosis treated to the waste water from described first high-pressure pump；Described first reverse osmosis
The reverse osmosis membrane that equipment is adopted thoroughly is antipollution complex reverse osmosis membrane；
First concentrated water case, for receiving the seepage remaining liquid of described first reverse osmosis equipment；
Two-stage reverse osmosis system, for carrying out reverse-osmosis treated to the seepage remaining liquid of described first-stage reverse osmosis system；Described two grades anti-
Osmosis system includes：
Second booster pump, for being pressurized to the waste water from described first concentrated water case；
Second cartridge filter, for filtering to the waste water from described second booster pump；
Second high-pressure pump, for lifting the pressure of the filtrate of described second cartridge filter；
Second reverse osmosis equipment, for carrying out reverse-osmosis treated to the waste water from described second high-pressure pump；Described second reverse osmosis
Saturating equipment is disc tube reverse osmosis (dt-ro) film device, film device or ductwork type reverse osmosis membrane equipment are strengthened in oscillatory shear；
Second concentrated water case, for receiving the seepage remaining liquid of described second reverse osmosis equipment；
Evaporation and crystallization system, for making the seepage remaining liquid evaporative crystallization of described two-stage reverse osmosis system.
2. wastewater treatment equipment according to claim 1 is it is characterised in that described wastewater treatment equipment also includes product water
Case, described product water tank is used for receiving the penetrating fluid of described first-stage reverse osmosis system and two-stage reverse osmosis system.
3. wastewater treatment equipment according to claim 1 is it is characterised in that described wastewater treatment equipment also includes heat exchange
Device, described heat exchanger is arranged between described single filter system and cascade filtration system, for adjusting through described single filter
The temperature of the waste water after system process.
4. the method that the wastewater treatment equipment any one of a kind of employing claim 1-3 processes waste water, walks including following
Suddenly：
A, waste water introducing regulating reservoir is carried out homogenizing and all measures regulation, add flocculant in the waste water to after adjust and make waste water in pipe
Fully flocculated in road blender；
B, the waste water being obtained using described mechanical filter and piping filter process step a, with remove the floccule body in waste water,
Float and solid phase impurity, make delivery turbidity≤5NTU；
C, carry out ultrafiltration using the waste water that described ultrafiltration apparatuss obtain to step b, make ultra-filtration water SDI≤3；Using described nanofiltration
Equipment carries out nanofiltration to described ultra-filtration water, removes in ultra-filtration water more than 80% hardness ions；
D, the waste water that step c is obtained carry out reverse-osmosis treated, and the seepage remaining liquid obtaining after reverse-osmosis treated are evaporated tie
Brilliant；TDS≤the 600mg/L of reverse-osmosis treated gained penetrating fluid.
5. method according to claim 4 it is characterised in that waste water described in step a TDS be not less than 1500mg/L,
Turbidity is not less than 10NTU, and the COD value of described waste water is not less than 100mg/L.
6. method according to claim 5 is it is characterised in that in step c, the waste water that described step b obtains is being surpassed
Add antibacterial before filter.
7. method according to claim 6 is it is characterised in that in step c, the waste water that described step b obtains is being surpassed
Using heat exchanger, temperature is adjusted to 5 DEG C -30 DEG C before filter.
8. the method according to any one of claim 4-7 is it is characterised in that in step d, described first-stage reverse osmosis system
Penetrating fluid TDS≤500mg/L, yield is the 60%-70% of the wastewater flow that described first-stage reverse osmosis system is processed；Described
TDS≤the 1000mg/L of the penetrating fluid of two-stage reverse osmosis system, yield is the wastewater flow that described two-stage reverse osmosis system is processed
70%-80%.
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| CN101935118A (en) * | 2010-08-16 | 2011-01-05 | 刘春喜 | Process for purifying and recycling hot water by membrane method |
| CN201864630U (en) * | 2010-09-28 | 2011-06-15 | 上海立昌环境工程有限公司 | Zero-discharge device for treating printing and dyeing wastewater |
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