CN106630275A - Zero-discharge treatment process for pickling passivation wastewater - Google Patents
Zero-discharge treatment process for pickling passivation wastewater Download PDFInfo
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- CN106630275A CN106630275A CN201611126977.3A CN201611126977A CN106630275A CN 106630275 A CN106630275 A CN 106630275A CN 201611126977 A CN201611126977 A CN 201611126977A CN 106630275 A CN106630275 A CN 106630275A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000008569 process Effects 0.000 title claims abstract description 65
- 208000028659 discharge Diseases 0.000 title claims abstract description 36
- 238000002161 passivation Methods 0.000 title claims abstract description 28
- 238000005554 pickling Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 148
- 238000001728 nano-filtration Methods 0.000 claims abstract description 97
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 89
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims description 32
- 239000006200 vaporizer Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 20
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000008020 evaporation Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000006386 neutralization reaction Methods 0.000 claims description 12
- 239000003643 water by type Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
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- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000008394 flocculating agent Substances 0.000 claims description 3
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
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- 239000005708 Sodium hypochlorite Substances 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
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- 230000000694 effects Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
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- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
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- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 239000000149 chemical water pollutant Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material 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
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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 zero-discharge treatment process for pickling passivation wastewater. The zero-discharge treatment process comprises a pretreatment process and a deep treatment process, wherein the deep treatment process comprises the following steps: lifting the pretreated wastewater into a raw water tank; pressurizing the raw water with a raw water pressure pump, adding a bactericidal scale inhibitor, and then delivering to an ultrafiltration device; filtering the raw water with the ultrafiltration device, delivering to an ultrafiltration water producing tank, and then feeding into a nanofiltration security filter with a nanofiltration water supply pump for filtration; delivering the wastewater filtered by the nanofiltration security filter to a nanofiltration device for filtration, and then delivering to a nanofiltration water producing tank; delivering nanofiltration supernatant in the nanofiltration water producing tank to a reverse osmosis security filter by a reverse osmosis water supply pump for filtration, and delivering the filtered wastewater to a reverse osmosis device by a reverse osmosis high-pressure pump for filtration; delivering the reverse osmosis supernatant filtered by the reverse osmosis device to the reverse osmosis water producing tank, and producing and recycling by a recycling water pump. The treatment process provided by the invention reduces investment cost and can be operated stably and effectively after pretreatment and deep treatment.
Description
Technical field
The present invention relates to acid wash passivation technical field of waste water processing, specifically one kind can reach wastewater zero discharge mark
Accurate acid wash passivation waste water zero discharge treatment process.
Background technology
Existing acid wash passivation waster water process, discharge of wastewater is performed and receives pipe discharge standard, and after wastewater treatment is up to standard city is entered
City's sewage network.Existing sewage disposal system contains：Materialization and biochemical processing process, system can stable operation, effluent quality is steady
Fixed, big portion removes SS and colloid, organic pollution, colourity, the surfactant in waste water.Existing acid wash passivation waste water work
Reach after the enough original sub-blocks that will contain 1500mg/L or so COD of artistic skill and receive pipe discharge standard and require (≤500mg/L) adapter discharge,
Actual discharge COD concentration is 350mg/L or so.At present Taihu Lake basin zero emission requirement effluent quality reaches：CODCrFor≤30mg/
L、BODrIt is≤0.5NTU, NH for≤5mg/L, turbidity4- N is zero-emission, total nitrogen is zero-emission, total phosphorus is zero-emission, pH value is
6-9, salinity are≤100mg/L, and existing acid wash passivation waster water process does not obviously reach above-mentioned requirements.
The content of the invention
The purpose of the present invention is the problem existed for prior art, there is provided a kind of wastewater zero discharge standard of can reaching
Acid wash passivation waste water zero discharge treatment process.
The purpose of the present invention is solved by the following technical programs：
A kind of acid wash passivation waste water zero discharge treatment process, including pretreating process and advanced treatment process, its feature exists
In：The step of advanced treatment process, is as follows：
2.1) pond is discharged by pretreated waste water lifting to raw water box from wastewater treatment using waste water lifting pump；
2.2) raw water that ultrafiltration apparatus are filtered is sent to raw water box using raw water force (forcing) pump to be pressurizeed and in pressurization
After add sterilizing scale inhibiting agent；
2.3) raw water delivers to ultrafiltration product water tank Jing after ultrafiltration apparatus filtration and is pumped into nanofiltration using nanofiltration feedwater and ensured public security
Filter is filtered；
2.4) waste water after the filtration of nanofiltration cartridge filter is delivered to after nanofiltration device is filtered using nanofiltration high-pressure pump and is sent to
Water tank is produced in nanofiltration；
2.5) the nanofiltration clear liquid that nanofiltration is produced in water tank is sent to reverse osmosis cartridge filter filtration and is carried out by reverse osmosis feedwater pump
Filter, and the waste water after using reverse osmosis high-pressure pump is filtered reverse osmosis cartridge filter is delivered to reverse osmosis unit and is filtered；
2.6) counter-infiltration clear liquid that reverse osmosis unit is filtered out is delivered to reverse osmosis produced water tank and is produced by reuse water pump
Reuse.
The step 2.2) in sterilizing scale inhibiting agent be non-oxidiser.
The step 2.3) in waste water deliver to ultrafiltration produce water tank before add sodium hypochlorite, acid, alkali, and waste water ultrafiltration produce
Nanofiltration cartridge filter is pumped in water tank by nanofiltration feedwater after neutralization reaction to be filtered.
The step 2.3) in nanofiltration feed pump waste water is delivered to add during nanofiltration cartridge filter acid and receive
Filter antisludging agent adjusts pH value and is sent to nanofiltration cartridge filter after reacting, and the filtering accuracy of the nanofiltration cartridge filter is 10 μm.
The step 2.4) in the nanofiltration membrane component molecular cut off of nanofiltration device be 150～300 dalton, and nanofiltration
The nanofiltration concentrated water produced after device nanofiltration is sent to nanofiltration concentrated water case and the feedwater of Jing concentrated waters is pumped to DTRO cartridge filters and carried out
Filter, DTRO cartridge filters are sent to DTRO after filtering enrichment facility does not carry out concentration, DTRO not enrichment facility concentration
Acquisition concentrated water afterwards is sent to integrated concentrated water case, and the concentrated water in integrated concentrated water case delivers to vaporizer and is evaporated process, and vaporizer steams
The steam for going out sent out is sent to the condensed water obtained after condenser condensation and is sent to reverse osmosis produced water tank, and the material that vaporizer is retained is sent to
The solid waste outward transport that centrifuge is obtained.
The step 2.5) in the filtering accuracy of reverse osmosis cartridge filter be 5 μm, and will be anti-in reverse osmosis high-pressure pump
Waste water after infiltration cartridge filter is filtered delivers to addition reduction antisludging agent during reverse osmosis unit.
The step 2.6) in reverse osmosis unit produce reverse osmosis concentrated water be sent to nanofiltration concentrated water case and Jing concentrated waters feedwater
It is pumped to DTRO cartridge filters to be filtered, DTRO cartridge filters are sent to DTRO after filtering, and enrichment facility is not carried out at concentration
Reason, acquisition concentrated waters of the DTRO not after enrichment facility concentration is sent to integrated concentrated water case, and the concentrated water in integrated concentrated water case delivers to steaming
Send out device and be evaporated processs, the steam for going out of evaporator evaporation be sent to the condensed water of acquisition after condenser condensation be sent to it is reverse osmosis produced
Water tank, the material that vaporizer is retained is sent to the solid waste outward transport of centrifuge acquisition.
The step 2.6) in reverse osmosis unit produce reverse osmosis concentrated water be sent to after integrated concentrated water case neutralisation treatment
Nanofiltration concentrated water delivers to vaporizer and is evaporated process after being mixed, the steam for going out of evaporator evaporation is sent to after condenser condensation
The condensed water of acquisition is sent to reverse osmosis produced water tank, and the material that vaporizer is retained is sent to the solid waste outward transport of centrifuge acquisition.
Cleaning device is all configured with ultrafiltration apparatus, nanofiltration device and reverse osmosis unit in the advanced treatment process.
The step of pretreating process, is as follows：
1.1) acid wash passivation waste water is pumped into mechanical neutralization reaction pond by waste water lifting, enters in mechanical neutralization reaction pond
NaOH solution regulation pH value is added while row stirring makes phosphorus generate hydroxyapatite to remove；
1.2) calcium chloride solution is added during the waste water after stir process being sent to into microvovtex depositing reservoir, and it is clear in microvovtex
Flocculating agent is added in clear pond, the insoluble precipitate for fully producing after reaction delivers to sludge-tank and Jing pressure filter is processed into outside dry mud
Fortune；
1.3) microvovtex depositing reservoir water outlet is first sent to be sent to again in biological contact oxidation pond after biochemical anoxic pond is processed and is processed, raw
Dissolved oxygen in thing contact-oxidation pool is not less than 3.0g/l；
1.4) waste water after biological contact oxidation pond is processed is sent to Radial Flow Secondary Sedimentation Tank carries out solid-liquid separation；
1.5) waste water produced after solid-liquid separation sequentially sends into intermediate pool, sand filter, active carbon filter process simultaneously
Acquisition clear water is sent to wastewater treatment discharge pond and waits for advanced treating.
The present invention has the following advantages compared to existing technology：
The acid wash passivation waste water zero discharge treatment process of the present invention passes through pretreatment and advanced treatment so that the handling process
Subsequently improved on the basis of existing apparatus are not changed substantially, reduce cost of investment and steadily can effectively run；
The normal operation for being disposed to guarantee reverse osmosis unit of pretreatment, it is effectively pre- to carrying out into the water source of reverse osmosis unit
Process to prevent from causing reverse osmosis unit expendable damage；All return so that processing water outlet additionally, due to zero emission requirement
With, consider first salt balance cause technique must salt discharge, system is unable to effluent, unique selection row's solid salt, therefore last place
Science and engineering sequence is evaporative crystallization, and because the cost of waste water evaporative crystallization is very high, therefore Waste water concentrating is considered before evaporative crystallization.
Description of the drawings
Accompanying drawing 1 is acid wash passivation waste water zero discharge treatment process pretreatment process figure of the invention；
Accompanying drawing 2 is acid wash passivation waste water zero discharge treatment process advanced treating flow chart of the invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further illustrated with embodiment.
As shown in Figure 1-2：A kind of acid wash passivation waste water zero discharge treatment process, including pretreating process and depth science and engineering
The step of skill, wherein pretreating process, is as follows：
1.1) acid wash passivation waste water is pumped into mechanical neutralization reaction pond by waste water lifting, enters in mechanical neutralization reaction pond
NaOH solution regulation pH value is added while row stirring makes phosphorus generate hydroxyapatite to remove；
1.2) calcium chloride solution is added during the waste water after stir process being sent to into microvovtex depositing reservoir, and it is clear in microvovtex
Flocculating agent is added in clear pond, the insoluble precipitate for fully producing after reaction delivers to sludge-tank and Jing pressure filter is processed into outside dry mud
Fortune；
1.3) microvovtex depositing reservoir water outlet is first sent to be sent to again in biological contact oxidation pond after biochemical anoxic pond is processed and is processed, raw
Dissolved oxygen in thing contact-oxidation pool is not less than 3.0g/l；1.4) waste water after biological contact oxidation pond is processed is sent to radial-flow two
Heavy pond carries out solid-liquid separation；
1.5) waste water produced after solid-liquid separation sequentially sends into intermediate pool, sand filter, active carbon filter process simultaneously
Acquisition clear water is sent to wastewater treatment discharge pond and waits for advanced treating；
The step of advanced treatment process, is as follows：
2.1) pond is discharged by pretreated waste water lifting to raw water box from wastewater treatment using waste water lifting pump；
2.2) raw water that ultrafiltration apparatus are filtered is sent to raw water box using raw water force (forcing) pump to be pressurizeed and in pressurization
Add non-oxidiser afterwards as sterilizing scale inhibiting agent；
2.3) raw water delivers to ultrafiltration Jing after ultrafiltration apparatus filtration and produces water tank and add hypochlorous acid before delivering to ultrafiltration and producing water tank
Sodium, acid, alkali, waste water is pumped to nanofiltration cartridge filter and carried out after neutralization reaction in ultrafiltration product water tank by nanofiltration feedwater
Filter, while nanofiltration feed pump adds acid and nanofiltration antisludging agent to adjust pH value simultaneously during waste water is delivered to into nanofiltration cartridge filter
Nanofiltration cartridge filter is sent to after reaction, the filtering accuracy of the nanofiltration cartridge filter is 10 μm；
2.4) waste water after the filtration of nanofiltration cartridge filter is delivered to after nanofiltration device is filtered using nanofiltration high-pressure pump and is sent to
Water tank is produced in nanofiltration, and the nanofiltration membrane component molecular cut off of nanofiltration device is to produce after 150～300 dalton, and nanofiltration device nanofiltration
Raw nanofiltration concentrated water is sent to nanofiltration concentrated water case and the feedwater of Jing concentrated waters is pumped to DTRO cartridge filters and is filtered, and DTRO ensured public security
Filter is sent to DTRO after filtering enrichment facility does not carry out concentration, and acquisition concentrated waters of the DTRO not after enrichment facility concentration is sent
Toward integrated concentrated water case, the concentrated water in integrated concentrated water case delivers to vaporizer and is evaporated process, and the steam for going out of evaporator evaporation send
The condensed water obtained toward after condenser condensation is sent to reverse osmosis produced water tank, and the material that vaporizer is retained is sent to centrifuge acquisition
Solid waste outward transport；
2.5) the nanofiltration clear liquid that nanofiltration is produced in water tank is sent to reverse osmosis cartridge filter filtration and is carried out by reverse osmosis feedwater pump
Filter, and the waste water after using reverse osmosis high-pressure pump is filtered reverse osmosis cartridge filter is delivered to reverse osmosis unit and is filtered,
The filtering accuracy of reverse osmosis cartridge filter is 5 μm, and useless after reverse osmosis high-pressure pump filters reverse osmosis cartridge filter
Water adds reduction antisludging agent during delivering to reverse osmosis unit；
2.6) counter-infiltration clear liquid that reverse osmosis unit is filtered out is delivered to reverse osmosis produced water tank and is produced by reuse water pump
Reuse；The reverse osmosis concentrated water that specifically reverse osmosis unit is produced is sent to nanofiltration concentrated water case and the feedwater of Jing concentrated waters is pumped to DTRO guarantors
Peace filter is filtered, and DTRO cartridge filters are sent to DTRO after filtering, and enrichment facility does not carry out concentration, and DTRO is not dense
Acquisition concentrated water after compression apparatus concentration is sent to integrated concentrated water case, and the concentrated water in integrated concentrated water case is delivered to vaporizer and is evaporated
Process, the steam for going out of evaporator evaporation is sent to the condensed water obtained after condenser condensation and is sent to reverse osmosis produced water tank, vaporizer
The material of retention is sent to the solid waste outward transport of centrifuge acquisition；Or reverse osmosis unit produce reverse osmosis concentrated water be sent to it is integrated
Nanofiltration concentrated water after concentrated water case neutralisation treatment delivers to vaporizer and is evaporated process, the steaming for going out of evaporator evaporation after being mixed
Vapour is sent to the condensed water obtained after condenser condensation and is sent to reverse osmosis produced water tank, and the material that vaporizer is retained is sent to centrifuge
The solid waste outward transport of acquisition.
Cleaning device is all configured with ultrafiltration apparatus, nanofiltration device and reverse osmosis unit in other advanced treatment process.
Below by operation principle and processing performance to ultrafiltration apparatus involved in advanced treatment process, nanofiltration device,
Reverse osmosis unit, DTRO film condensing devices and evaporation and crystallization system are described in further detail.
First, ultrafiltration apparatus
The operation principle of ultrafiltration apparatus is：Under certain ambient pressure effect, when solution to be separated (feeding liquid) is with one
When fixed flow velocity is along film side Surface runoff, solvent (such as water) and low molecule solute (such as inorganic salts) will transmit through membrane micropore extremely
The opposite side of film, and the envelope such as polymer substance, colloidal particles, pyrogen and antibacterial, microorganism in solution dams to get off,
So as to realizing separating, concentrating and purification, the purpose for purifying.It is generally acknowledged that ultrafiltration is the mistake of a kind of " screening " and cross-flow and slipstream
Journey, due to forming the condition of fluid shearing on the wall of doughnut, so that pollutant are more difficult formed on film surface, and
Discharged as concentration relief liquor.This filter process declines can the pollution tendencies of film, and the cleaning frequency extends.In ultrafiltration apparatus
Membrane module performance parameter it is as follows：
| Membrane quantity (is propped up) | 1×52 |
| Ultrafiltration apparatus are exerted oneself | 1×1.5m3/h |
| Operating pressure | 0.1～0.2MPa |
| Operation pressure | 0.01～0.1MPa |
| Backwash pressure | ≤0.1MPa |
| Microorganism clearance | >=99% |
| Clearance to colloidal silicon | 99.0% |
| Clearance to CI | 99.0% |
| Clearance to colloidal aluminum | 99.0% |
| Clearance to suspended solid | 99.99% |
| Clearance to TOC | About 30% |
| Delivery turbidity | <0.2NTU |
| Water outlet SDI | <3.0 |
| The response rate of water | >=90% |
| Filter cycle | >=30 minutes |
| Backwash always lasts | ≤ 2 minutes |
| The Chemical cleaning cycle | 1-3 month |
| Enter water ph value | 1-10 |
| Film service life | >=2 years |
The inflow requirement of the membrane module in ultrafiltration apparatus is：Undissolved solid thing content is less than 5wt%, grain diameter in water
It is 1-13 less than 100 μm, chlorine residue or oxygenate content ＜ 0.1, pH value range.
2nd, nanofiltration device
The operation principle of nanofiltration device is：Without thalline and float, ammonia nitrogen index is for waste water water outlet after pretreatment
Substantially it is up to standard, but can not also remove in part difficult degradation CODcr, Organic substance, colourity, ammonia nitrogen and total nitrogen still can not be up to standard, intend adopting
Advanced treating is carried out with nanofiltration.Organic substance in percolate, heavy metal and high valence ion can be further removed using nanofiltration, while
Good Effect of Pretreatment is played to follow-up reverse-osmosis treated, the fouling and dirt for being prevented effectively from reverse osmosiss is stifled.The work of nanofiltration device
Skill feature is：Operation force down, energy consumption it is low：Nanofiltration membrane component there is selectivity to retain ion, it is allowed to which monovalent salt passes through film, tool
There is medium desalination rate；Due to monovalention permeable membrane, osmotic pressure will not be produced, so comparing reverse osmosiss with lower operation
Pressure；(2) it is good to Organic substance, heavy metal, colourity removal effect：Nanofiltration membrane component molecular cut off is 150～300 dalton, right
The removing of Organic Pollutants of Landfill Leachate, heavy metal, high price salt and colourity is imitated, while avoiding the fouling and dirt of follow-up reverse osmosiss stifled；⑶
Antifouling property is good：Using three layers of composite nanometer filter membrane component, its resistance tocrocking is good, stable, relatively small by variation water quality；
(4) the response rate is high：The nanofiltration response rate can reach more than 85-90%, compare reverse osmosiss and can reach the higher response rate.10 ton days
The technical parameter of rolling nanofiltration device is：
Due to waste water composition complicated, there is various calcium, magnesium, silicon etc. and plant difficulty soluble salt, these indissoluble inorganic salts are entered and received
Due to being trapped and high power concentration after filter system, knot will be produced on film surface when the dissolubility under the conditions of its concentration exceedes this
Dirty phenomenon.To prevent inorganic salt fouling, pH value regulation must be carried out to raw water before into nanofiltration；In addition to silicon fouling is prevented,
A certain amount of antisludging agent is added before into nanofiltration cartridge filter.To improve the nanofiltration response rate, while overcome fouling membrane, rolling
Using concentration interior circulation pattern, membrane module part concentrated water is returned directly to the component or the import of this section, and mutually mixes with water inlet for nanofiltration
Close, so as to ensure film surface filtration flow velocity.Nanofiltration concentrated water enters nanofiltration concentrated water case, and nanofiltration clear liquid enters nanofiltration and produces water tank.
3rd, reverse osmosis unit
The operation principle of reverse osmosis unit is：Particle separation diameter is generally less than 0.1nm, and its separating particles rank can reach ion
Rank, is most accurate embrane method liquid separation technology, and it can stop the Organic substance of all dissolubility salt and molecular weight more than 100,
Slaine, organic pollution, antibacterial, colloidal particle, the pyrogen of solubility can be removed, its salt rejection rate is right more than 99%
The removal efficiency of COD, ammonia nitrogen and total nitrogen can reach more than 90%, effluent quality self-stabilization.Because nanofiltration is to nitrate nitrogen, nitrous state
Nitrogen, sodium ion removal efficiency it is relatively low, the water outlet of nanofiltration except total nitrogen may not it is up to standard in addition to, outward remaining index can be stablized and reach
Mark.The clear liquid that back segment nanofiltration is produced further is processed using reverse osmosiss, guarantees that water outlet total nitrogen reaches further to remove total nitrogen
Discharge standard.According to the difference of influent quality, reverse osmosiss operating pressure is 20bar -70bar.The process characteristic of reverse osmosis unit
For：(1) stable effluent quality is up to standard：Reverse osmosis membrane assembly can reach more than 90% to the removal efficiency of COD, ammonia nitrogen and total nitrogen, go out
Water water quality self-stabilization is up to standard；(2) antifouling property is good：Using three layers of composite polyamide membrane component, its resistance tocrocking is good, and operation is steady
It is fixed, it is relatively small by variation water quality；(3) the response rate is high：There are thing pollutant, institute due to through MBR pretreatment, having removed major part
One higher level can be reached with the reverse osmosiss response rate.The technical parameter of 8.5 ton day rolling reverse osmosis units is：
To improve the reverse osmosiss response rate, while overcoming fouling membrane, rolling reverse osmosiss are also adopted by concentrating interior circulation pattern, film group
Part part concentrated water is returned directly to the component or the import of this section, and mixes with water inlet, so as to ensure film surface filtration flow velocity；Separately
Outer reverse osmosis concentrated water enters concentration liquid treating system and processes, and standard water discharge is discharged or reuse.
4th, DTRO film condensing devices
DTRO film condensing devices can remove various organic or inorganic impurity, including heavy metal, ammonia, various Organic substances, nothing
Machine thing and other harmful substances；Efficiently, operating cost is low for DT films column performance.Feed liquid is led to behind the gap between diaphragm and shell
Flow-guiding channel is crossed in the flow guiding disc of bottom, processed liquid flows quickly through filter membrane with most short distance, then 180 ° it is inverse
Go to another face, then be flowed into next filtration membrane, so as to film surface formed by flow guiding disc circumference to justify center, again to
Circumference, the tangential flow filtration at Zai Daoyuan centers, concentrated solution finally flows out from feed end flange.Feed liquid flows through the same of filter membrane
When, permeate is constantly discharged by central collection tube.Concentrated solution and permeate by the O-ring seal that is installed on flow guiding disc every
From.The technological process of DTRO film condensing devices：Nanofiltration concentrated water is lifted and Jing after DTRO cartridge filters are filtered Jing concentrated water feed pump,
DTRO film condensing devices are entered by piston high-pressure pump pressurization, the fresh water gravity flow Jing after DTRO film device concentration enters DTRO fresh water
Pond (or returning reverse osmosis produced water tank reprocessing), concentrated water then enters integrated concentrated water case；Reach after DTRO film condensing device concentrated waters are concentrated
6% concentration, then follow-up multiple-effect evaporation crystal system is lifted into by elevator pump carries out crystallization treatment, crystal is filled after drying
Car is transported outward；Condensed fluid is back to reverse osmosis produced water tank.
DTRO cartridge filters in concentrated water concentration systems be in order to prevent water in microgranule enter DTRO film condensing devices,
Fine Machinery impurity, the crushing activated carbon granule leaked in DTRO cartridge filter energy effectively catching pre-processing devices, it is ensured that anti-
The cleannes of infiltration water inlet, this granule may puncture reverse-osmosis membrane element Jing after high-pressure pump acceleration, cause letting out for a large amount of salts
Leakage, while the impeller of high-pressure pump may be scratched.DTRO cartridge filters filtering element is the replaceable cassette filter of 5 μm of aperture GE companies of the U.S.
Unit, it has surface area big；Filter efficiency is high, can enter in-depth filtration；Contamination capacity is big, long service life, changes simplicity etc.
Advantage.
5th, evaporation and crystallization system
Vaporizer i.e. a kind of heat exchanger.But compare with general diabatic process, evaporation operation there are following features again：⑴
The elevation of boiling point：Solute containing fixedness in the solution of evaporation is pure under at the same pressure the vapour pressure of solution is more synthermal
The steam of solvent is forced down, and makes the boiling point of solution higher than the boiling point of neat solvent, and this phenomenon is referred to as the rising of solution boiling point.In heating
In the case that vapor (steam) temperature is certain, heat transfer temperature difference when evaporating solution is necessarily smaller than the temperature difference of heating neat solvent, and solution
Concentration is higher, this to affect also more notable；(2) the operational characteristic of material：The solution of evaporation itself has some characteristics, for example, have
A little materials may separate out crystal in concentration, or be easy to fouling；Some then have larger corrosivity of viscosity or stronger etc..Such as
What selects suitable evaporation flow process and equipment to be that evaporation operation has to asking for consideration according to the characteristic and technological requirement of material
Topic；(3) energy saving：The quantity of solvent vaporized during evaporation is larger, needs to consume larger energy.How heat is made full use of, be to steam
Send out operation another to be considered problem.The main body of evaporation equipment is vaporizer, and it is mainly made up of heater and separator, this
Equipment adopts forced circling evaporator.The equipment technical parameters of vaporizer：(1) name of material：Brine waste；(2) at design
Reason amount：≥200L/h；(3) feeding temperature (DEG C)：Room temperature；(4) drop temperature (DEG C)：-75；(5) equipment material：Material contact site
Position adopts 304, miscellaneous part Q235B；(6) heat form：Electrical heating, electric heating tube makes material be uniformly distributed in each row
The outer wall of pipe, makes heating tube and heated material fully contact heat exchange, balances whole heter temperature.
The acid wash passivation waste water zero discharge treatment process of the present invention passes through pretreatment and advanced treatment so that the handling process
Subsequently improved on the basis of existing apparatus are not changed substantially, reduce cost of investment and steadily can effectively run；
The normal operation for being disposed to guarantee reverse osmosis unit of pretreatment, it is effectively pre- to carrying out into the water source of reverse osmosis unit
Process to prevent from causing reverse osmosis unit expendable damage；All return so that processing water outlet additionally, due to zero emission requirement
With, consider first salt balance cause technique must salt discharge, system is unable to effluent, unique selection row's solid salt, therefore last place
Science and engineering sequence is evaporative crystallization, and because the cost of waste water evaporative crystallization is very high, therefore Waste water concentrating is considered before evaporative crystallization.
Above example technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within；The technology that the present invention is not directed to can be realized by prior art.
Claims (10)
1. a kind of acid wash passivation waste water zero discharge treatment process, including pretreating process and advanced treatment process, it is characterised in that：
The step of advanced treatment process, is as follows：
2.1) pond is discharged by pretreated waste water lifting to raw water box from wastewater treatment using waste water lifting pump；
2.2) raw water that ultrafiltration apparatus are filtered is sent to raw water box using raw water force (forcing) pump to be pressurizeed and added after the pressurizing
Plus sterilizing scale inhibiting agent；
2.3) raw water delivers to ultrafiltration Jing after ultrafiltration apparatus filtration and produces water tank and be pumped into nanofiltration cartridge filter using nanofiltration feedwater
Filtered；
2.4) waste water after the filtration of nanofiltration cartridge filter is delivered to after nanofiltration device is filtered using nanofiltration high-pressure pump and is sent to nanofiltration
Produce water tank；
2.5) the nanofiltration clear liquid that nanofiltration is produced in water tank is sent to reverse osmosis cartridge filter and is filtered by reverse osmosis feedwater pump,
And the waste water after using reverse osmosis high-pressure pump is filtered reverse osmosis cartridge filter is delivered to reverse osmosis unit and is filtered；
2.6) counter-infiltration clear liquid that reverse osmosis unit is filtered out delivers to reverse osmosis produced water tank and carries out production reuse by reuse water pump.
2. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The step 2.2) in
Sterilizing scale inhibiting agent be non-oxidiser.
3. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The step 2.3) in
Waste water deliver to ultrafiltration and produce and add before water tank sodium hypochlorite, acid, alkali, and waste water and produce in water tank after neutralization reaction by receiving in ultrafiltration
Filter feedwater is pumped to nanofiltration cartridge filter and is filtered.
4. the acid wash passivation waste water zero discharge treatment process according to claim 1 or 3, it is characterised in that：The step
2.3) the nanofiltration feed pump in adds acid and nanofiltration antisludging agent to adjust pH value during waste water is delivered to into nanofiltration cartridge filter
And nanofiltration cartridge filter is sent to after reacting, the filtering accuracy of the nanofiltration cartridge filter is 10 μm.
5. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The step 2.4) in
Nanofiltration device nanofiltration membrane component molecular cut off be 150～300 dalton, and nanofiltration device nanofiltration after produce nanofiltration it is dense
Water is sent to nanofiltration concentrated water case and the feedwater of Jing concentrated waters is pumped to DTRO cartridge filters and is filtered, after DTRO cartridge filters are filtered
Enrichment facility does not carry out concentration to be sent to DTRO, and acquisition concentrated waters of the DTRO not after enrichment facility concentration is sent to integrated concentrated water
Case, the concentrated water in integrated concentrated water case delivers to vaporizer and is evaporated process, and it is cold that the steam for going out of evaporator evaporation is sent to condenser
The condensed water obtained after solidifying is sent to reverse osmosis produced water tank, and the material that vaporizer is retained is sent to outside the solid waste of centrifuge acquisition
Fortune.
6. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The step 2.5) in
The filtering accuracy of reverse osmosis cartridge filter be 5 μm, and after reverse osmosis high-pressure pump filters reverse osmosis cartridge filter
Waste water adds reduction antisludging agent during delivering to reverse osmosis unit.
7. acid wash passivation waste water zero discharge treatment process according to claim 1 or 5, it is characterised in that：The step
2.6) reverse osmosis concentrated water that the reverse osmosis unit in is produced is sent to nanofiltration concentrated water case and the feedwater of Jing concentrated waters is pumped to DTRO and ensured public security
Filter is filtered, and DTRO cartridge filters are sent to DTRO after filtering, and enrichment facility does not carry out concentration, and DTRO does not concentrate dress
Put the acquisition concentrated water after concentration and be sent to integrated concentrated water case, the concentrated water in integrated concentrated water case delivers to vaporizer and is evaporated place
Reason, the steam for going out of evaporator evaporation is sent to the condensed water obtained after condenser condensation and is sent to reverse osmosis produced water tank, and vaporizer is stayed
The material deposited is sent to the solid waste outward transport of centrifuge acquisition.
8. acid wash passivation waste water zero discharge treatment process according to claim 1 or 5, it is characterised in that：The step
2.6) the nanofiltration concentrated water that the reverse osmosis concentrated water that the reverse osmosis unit in is produced is sent to after integrated concentrated water case neutralisation treatment is mixed
After deliver to vaporizer and be evaporated process, the steam for going out of evaporator evaporation is sent to the condensed water obtained after condenser condensation and is sent to
Reverse osmosis produced water tank, the material that vaporizer is retained is sent to the solid waste outward transport of centrifuge acquisition.
9. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The depth science and engineering
Cleaning device is all configured with ultrafiltration apparatus, nanofiltration device and reverse osmosis unit in skill.
10. acid wash passivation waste water zero discharge treatment process according to claim 1, it is characterised in that：The pretreatment work
The step of skill, is as follows：
1.1) acid wash passivation waste water is pumped into mechanical neutralization reaction pond by waste water lifting, is stirred in mechanical neutralization reaction pond
NaOH solution regulation pH value is added while mixing makes phosphorus generate hydroxyapatite to remove；
1.2) calcium chloride solution is added during the waste water after stir process being sent to into microvovtex depositing reservoir, and in microvovtex depositing reservoir
Flocculating agent is inside added, the insoluble precipitate for fully producing after reaction delivers to sludge-tank and Jing pressure filter is processed into dry mud outward transport；
1.3) microvovtex depositing reservoir water outlet is first sent to be sent to again in biological contact oxidation pond after biochemical anoxic pond is processed and is processed, and biology connects
Dissolved oxygen in tactile oxidation pond is not less than 3.0g/l；
1.4) waste water after biological contact oxidation pond is processed is sent to Radial Flow Secondary Sedimentation Tank carries out solid-liquid separation；
1.5) waste water produced after solid-liquid separation sequentially sends into intermediate pool, sand filter, active carbon filter and processes and obtain
Clear water is sent to wastewater treatment discharge pond and waits for advanced treating.
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| CN107698060A (en) * | 2017-11-06 | 2018-02-16 | 江苏新海石化有限公司 | A kind of water-saving method for saving crude oil water consume |
| CN108218088A (en) * | 2018-02-11 | 2018-06-29 | 安徽江淮汽车集团股份有限公司 | Coating wastewater zero discharge treatment method and system |
| CN108249674A (en) * | 2018-02-08 | 2018-07-06 | 杭州意能电力技术有限公司 | A kind of pickle liquor Treatment and recovery utilizes device and method |
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| CN117003422A (en) * | 2023-08-03 | 2023-11-07 | 北京赛诺膜技术有限公司 | Resource treatment process applicable to pea protein whey wastewater |
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Application publication date: 20170510 |