CN106430739A - Sea-water-desalination pre-treatment system and technology for nuclear power station - Google Patents
Sea-water-desalination pre-treatment system and technology for nuclear power station Download PDFInfo
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- CN106430739A CN106430739A CN201611103318.8A CN201611103318A CN106430739A CN 106430739 A CN106430739 A CN 106430739A CN 201611103318 A CN201611103318 A CN 201611103318A CN 106430739 A CN106430739 A CN 106430739A
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- 238000010612 desalination reaction Methods 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 238000002203 pretreatment Methods 0.000 title abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 100
- 239000012528 membrane Substances 0.000 claims abstract description 74
- 239000013535 sea water Substances 0.000 claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000005189 flocculation Methods 0.000 claims abstract description 15
- 230000016615 flocculation Effects 0.000 claims abstract description 15
- 239000000706 filtrate Substances 0.000 claims description 49
- 230000005484 gravity Effects 0.000 claims description 46
- 239000002245 particle Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 23
- 238000011001 backwashing Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 10
- 239000003830 anthracite Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 claims description 9
- 229920002396 Polyurea Polymers 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000001764 infiltration Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 229910000885 Dual-phase steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 2
- 238000004220 aggregation Methods 0.000 claims description 2
- 244000005700 microbiome Species 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 238000001223 reverse osmosis Methods 0.000 abstract description 12
- 238000005188 flotation Methods 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 239000003814 drug Substances 0.000 abstract 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 241000195493 Cryptophyta Species 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- -1 float Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000000725 suspension 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/52—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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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 sea-water-desalination pre-treatment system and technology, particularly discloses a sea-water-desalination pre-treatment system and technology for a nuclear power station, and belongs to the technical field of nuclear-power-station sea-water desalination. The system comprises a water distributing canal (2), a medicine adding mixing pool (3), a flocculation pool (4) and a comprehensive filtering device (8), wherein the water distributing canal (2), the medicine adding mixing pool (3), the flocculation pool (4) and the comprehensive filtering device (8) are sequentially communicated. A water feeding valve (1) is arranged on the water distributing canal (2), a stirrer (5) is arranged in the medicine adding mixing pool (3), and the comprehensive filtering device (8) is communicated with a dissolved air tank (6) through a dissolved air releaser (9), and is communicated with an ultra-filtration water generating pool (19) through ultra-filtration water generating pumps (16). According to the sea-water-desalination pre-treatment system and technology, three-stage filtration of air flotation, filter-pool primary flotation and ultra filtration is adopted, the water quality of pretreated water is guaranteed, and therefore the service life of a reverse osmosis membrane is prolonged. The sea-water-desalination pre-treatment system and technology also have the corrosion resistant performance, the running service life of the whole system is prolonged, system arrangement is simpler, the structure is more compact, and comprehensive economic benefits are increased.
Description
Technical field
The present invention relates to a kind of seawater desalinization pretreatment system and technique, particularly a kind of desalinization for nuclear power station
Pretreatment system and technique, belong to nuclear power station field of sea water desalting technology.
Background technology
Reverse osmosis technology is because its technical process is simple, energy consumption is low, operational control is easy, investment operation cost is relatively low at present
Feature, be most widely used in industrialization desalinization.China has put into effect and most in the nuclear power station desalinization built
Using reverse osmosis technology.But desalinization membrane element capability is susceptible to decay, and in major influence factors probability of happening, film is dirty
Dye accounts for 77.7%.Reverse osmosis membrane can retain and filter the Organic substance that all dissolubility salt and molecular weight are more than 100, but in sea water
The impact to reverse osmosis membrane for the organic fouling of small-molecular-weight be fatal, and after in-site chemical cleaning nor preferably repair
Multiple, lead to the service life of reverse osmosis membrane to reduce, need frequently to change reverse osmosis membrane, increase nuclear power station desalinization and run into
This.Especially when the low turbid sea water of winter low temperature or summer alga eruption, because winter ocean temperature is relatively low, suspension content is not
Height, settling property is bad；The summer water temperature conveniently microbial reproduction such as algae, content of organics instantaneously increases, to pretreatment system
System is formed compared with thump.The purpose of seawater desalinization pretreatment is to remove silt particle in sea water, float, colloid, Organic substance and algae
The materials such as class, it is to avoid above material enters reverse osmosis membrane system and causes dirty blocking up.Therefore, the quality of the effluent quality of pretreatment is direct
The life-span of impact reverse osmosis membrane.Equipment in traditional nuclear power station seawater desalinization pretreatment system arranges more open, number of devices
More, floor space ratio is larger, the silt larger to particle diameter, shellfish, big float treatment effect preferably, and to little granule
Thing, colloid, algae Organic substance etc. are poor because of its settling property, and operational effect is unsatisfactory.Again because of the high salt characterstic of sea water, to metal
Equipment and container have stronger corrosivity, and the water process routine equipment such as flotation tank or filter tank cannot tolerate the high salinity of sea water, send out
Get rusty erosion impact equipment life.
Content of the invention
It is an object of the invention to, a kind of seawater desalinization pretreatment system for nuclear power station and technique are provided.The present invention
The deficiency of conventional art being made up it is ensured that entering the water quality before reverse osmosis membrane, extending reverse osmosis membrane service life, and system
In equipment be resistant to the highly-saline severe corrosive of sea water, save and take up an area, energy efficient, reduce nuclear power station desalinization and run
Cost.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that：
This kind is used for the distributing channel, dosing mixing pit, wadding that the seawater desalinization pretreatment system of nuclear power station includes being sequentially communicated
Solidifying pond and integrated filtering device, distributing channel is provided with water intaking valve, is provided with agitator in dosing mixing pit, and integrated filtering device passes through
Dissolved air release is communicated in dissolving, integrated filtering device through ultrafiltration produce water pump be communicated in ultrafiltration produce pond, ultrafiltration produce pond with
Backwash pond shares, and saves floor space.
Aforesaid integrated filtering device includes air-dissolving air-float pond, filtrate Gravity filter and the submerged ultrafiltration interconnecting
Pond, is integrated in same structures, compact conformation, than the floor space saving 20% in the past.Air-dissolving air-float pond is erected
Straight height is higher than filtrate Gravity filter, and filtrate Gravity filter is located at air-dissolving air-float pond bottom, the vertical height of filtrate Gravity filter
Higher than immersed ultrafiltration membrane pond, immersed ultrafiltration membrane pond top is provided with membrane cisterna water producing pipe.In system operation, sea water only needs weight
Power flows through filtrate Gravity filter and immersed ultrafiltration membrane pond it is not necessary to setting elevator pump, water after filter pond, self-cleaning filter etc. set
Standby, configuration is simple, saves 10% Installed capital cost, more greatly reduces post facility operating cost.
The top in aforesaid air-dissolving air-float pond is additionally provided with slag skimmer, and the low turbid sea water of winter low temperature is poor because of Brownian movement, sinks
Fall poor performance, only undesirable by filtrate Gravity filter filter effect, small particle impurity float can be floated by air-dissolving air-float pond
Select to pool surface, remove it through slag skimmer.High segasso sea water during summer alga eruption equally because Organic substance proportion is little it is also possible to
Air supporting flotation removes to pool surface.
Aforesaid filtrate Gravity filter has two, two filtrate Gravity filter connections is built jointly, complements one another, to ensure it
In filter tank when shutting down backwash, water conservancy project work is normally produced in another filter tank it is ensured that air supporting, filtering and run without interruption, and ensures simultaneously
Immersed ultrafiltration membrane pond has continual and steady water source, not because the frequent backwash in filter tank causes ultrafiltration to produce the frequent start-stop of water pump, both extends
The service life of water pump is produced in ultrafiltration, ensures that ultrafiltration produces that water level in water pool is stable it is ensured that follow-up counter-infiltration system is not because of water source
Not enough and shut down, thus ensureing that nuclear power station sea-water-desalination water producing is reliable and stable to the full extent.
The side of aforesaid filtrate Gravity filter is additionally provided with filter tank backwash drain pipe and filter tank outlet valve, filtrate from top to bottom
Gravity filter connects filter tank backwashing pump, the setting of valve, pipeline and pump also by pipeline, can periodically be recoiled in filter tank
Wash it is ensured that the normal operation of system and good effluent quality.
It is filled with filtrate in aforesaid filtrate Gravity filter, laying anthracite, quartz sand from top to bottom are joined according to filtrate level
And cobblestone, wherein anthracite granule size be 0.8～1.6, quartz sand particle size be 0.5～1.2mm, cobblestone particle diameter be 1～
8mm.More containing silt when high sea or at the incoming tide turbidity are higher, the larger float ratio of such particle diameter is great, and settleability is good, can
Sink to filter tank bottom and removal is filtered by three-layer filter.
Further, it is also equipped with hyperfiltration reverse-rinsing pump and roots blower in system, can be periodically by immersed ultrafiltration membrane pond
Carry out air-water backwashing, improve effluent quality further.Immersed ultrafiltration membrane pond lays aeration tube, immersion ultrafiltration under film row
Membrane cisterna top connects hyperfiltration reverse-rinsing pump by membrane cisterna backwash water pipe respectively, and bottom connects roots blower by compressed air hose.
In order to improve the service life of this pretreatment system, aforesaid dosing mixing pit, flocculation basin, integrated filtering device and
Ultrafiltration produces the main body in pond all using reinforced concrete structure, inner surface integral spray anti-corrosion material polyureas, contacts with sea water
Concrete inner surface, also sprayed coating polyureas.With the metal embedded part of sea water directly contact all using super-duplex stainless steel
SS2507, nonmetallic materials adopt PE PVC or polyurea materials or ABS engineering plastics or nitrile rubber material.
, all using carbon steel material, agitator adopts two phase stainless steel 2507 material for aforesaid dissolving, roots blower.Filter tank
Backwashing pump, ultrafiltration produce water pump and hyperfiltration reverse-rinsing pump all using excessively stream material two phase stainless steel 2507, and filter tank backwashing pump is lifted pressure
Power 0.2Mpa, water pump and hyperfiltration reverse-rinsing pump adherence pressure 0.3Mpa are produced in ultrafiltration.Water intaking valve adopts pneumatic butterfly valve, and filter tank goes out
Water valve adopts electric brake plate valve, and slide valve material is dual phase steel 2507.
A kind of Pretreatment Technology of Seawater Desalination for nuclear power station, using the above-mentioned seawater desalinization pretreatment for nuclear power station
System.This technique all has preferable process to imitate in low temperature and low turbidity water, algae blooms water, these three difficult sea water of high sea flood tide sea water
Really, can normally be run, filter back washing, ultrafiltration membrane pool backwash, four kinds of operating modes such as ultrafiltration membrane pool Chemical cleaning.
Accidental conditions comprise the steps：
Flocculation, sea water flows into the dosing mixing pit adding flocculant, so that particle is entered after forming aggregation after mixing
Flocculation basin produces flocculate by flocculation reaction；
Air supporting, is entered in air-dissolving air-float pond and is mixed with microbubble mixing water, microbubble adheres to small particle impurity float
Surface, makes small particle impurity float be carried by bubble and excludes through slag skimmer to the water surface；
Filter tank initial filter, the larger float of particle diameter filters through three-level filtrate Gravity filter and removes；
Ultrafiltration, water outlet goes oil removal, colloid and microorganism by the ultrafiltration membrane filaments in immersed ultrafiltration membrane pond, by super
Is produced from pond in the ultrafiltration that is pumped to that water pump is produced in filter, then flows in follow-up counter-infiltration system.
Filter back washing step：Close water intaking valve, filter tank outlet valve, ultrafiltration is produced water and entered filter after the pressurization of filter tank backwashing pump
In material Gravity filter, backwash is carried out to filter tank, surface is washed less, just washing, enter wastewater disposal basin through filter tank backwash drain pipe.
Ultrafiltration membrane pool backwash step：Close water intaking valve, water pump and filter tank outlet valve are produced in ultrafiltration, open hyperfiltration reverse-rinsing pump and
Roots blower, ultrafiltration is produced water and is entered ultrafiltration membrane filaments through membrane cisterna backwash water pipe, and the compressed air hose of compressed air enters membrane cisterna, carries out
Backwash, air-water backwashing, backwash waste enters wastewater disposal basin.
Ultrafiltration membrane pool Chemical cleaning step：Close water intaking valve, water pump and filter tank outlet valve are produced in ultrafiltration, open ultrafiltration chemistry clear
Wash pump, chemical cleaning solution enters membrane cisterna, discharge cleanout fluid after soaking 1～2h to wastewater disposal basin, open hyperfiltration reverse-rinsing pump to ultrafilter membrane
Silk carries out backwash 2 times.
Compared with prior art, the present invention disclosure satisfy that the pretreatment of sea water special media, can cannot by legacy system
The small particle impurity suspended substance removal removing, air-dissolving air-float pond, filtrate Gravity filter and immersed ultrafiltration membrane pond is integrated in same
In one structures.This system structure is compact, than the floor space saving 20% in the past, it is not necessary to setting elevator pump etc. sets
Standby, configuration is simple, saves 10% Installed capital cost, also reduces post facility operating cost.System is air supporting → filter
It is ensured that pretreatment effluent quality, thus preferably protecting reverse osmosis membrane not blocked up by dirty, prolongation makes pond initial filter → ultrafiltration three-stage filtration
Use the life-span.In system, the anticorrosive of setting is resistant to the highly-saline severe corrosive of sea water, improves the operation of whole system
Life-span, it is ensured that system safe and stable operation, improves overall economic efficiency.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structure sectional view of the present invention；
Fig. 3 is the planar structure layout drawing of the present invention.
The implication of reference：1- water intaking valve, 2- distributing channel, 3- dosing mixing pit, 4- flocculation basin, 5- agitator, 6- is molten
Gas tank, 7- membrane cisterna backwash water pipe, 8- integrated filtering device, 9- dissolved air release, 10- air-dissolving air-float pond, 11- filtrate gravity is filtered
Pond, 12- slag skimmer, 13- filter tank backwashing pump, 14- immersed ultrafiltration membrane pond, 15- filter tank backwash drain pipe, water pump is produced in 16- ultrafiltration,
17- hyperfiltration reverse-rinsing pump, 18- roots blower, pond, 20- compressed air hose, 21- filter tank outlet valve are produced in 19- ultrafiltration, and 22- membrane cisterna produces
Water pipe, 23- anthracite, 24- quartz sand, 25- cobblestone.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
Embodiments of the invention 1：As shown in Figure 1, Figure 2 and Figure 3, the distributing channel 2 that this system includes being sequentially communicated, dosing mix
Close pond 3, flocculation basin 4 and integrated filtering device 8, distributing channel 2 is provided with water intaking valve 1, is provided with agitator 5 in dosing mixing pit 3, comprehensive
Close defecator 8 and dissolving 6 is communicated in by dissolved air release 9, integrated filtering device 8 produces water pump 16 through ultrafiltration and is communicated in ultrafiltration
Produce pond 19, ultrafiltration is produced pond 19 and shared with backwash pond, saves floor space.Integrated filtering device 8 includes interconnecting
Air-dissolving air-float pond 10, filtrate Gravity filter 11 and immersed ultrafiltration membrane pond 14, be integrated in same structures, structure is tight
Gather, than the floor space saving 20% in the past.Air-dissolving air-float pond 10 vertical height is higher than filtrate Gravity filter 11, filtrate weight
Power filter tank 11 is located at air-dissolving air-float pond 10 bottom, and the vertical height of filtrate Gravity filter 11 is higher than immersed ultrafiltration membrane pond 14, leaching
Formula ultrafiltration membrane pool 14 top is not had to be provided with membrane cisterna water producing pipe 22.In system operation, sea water only needs gravity to flow through the filter of filtrate gravity
Pond 11 and immersed ultrafiltration membrane pond 14, it is not necessary to the equipment such as setting elevator pump, water after filter pond, self-cleaning filter, configure simple,
Save 10% Installed capital cost, more greatly reduce post facility operating cost.The top in air-dissolving air-float pond 10 also sets
There is slag skimmer 12, by small particle impurity float flotation to pool surface, slag skimmer 12 removes it, and can go in air-dissolving air-float pond 10
Except the less colloid of proportion, Organic substance and algae etc. in sea water, to low temperature and low turbidity water, algae blooms water, high sea flood tide sea water this three
Planting difficult sea water all has preferable treatment effect.
Filtrate Gravity filter 11 has two, two filtrate Gravity filter 11 connections is built jointly, complements one another, to ensure wherein
When backwash is shut down in one filter tank, water conservancy project work is normally produced in another filter tank it is ensured that air supporting, filtration run without interruption, and ensures leaching simultaneously
Do not have formula ultrafiltration membrane pool 14 to have continual and steady water source, not because the frequent backwash in filter tank causes ultrafiltration to produce the frequent start-stop of water pump 16, both prolonged
Grown the service life that water pump 16 is produced in ultrafiltration, ensure that ultrafiltration produce pond 19 stable level it is ensured that follow-up counter-infiltration system not
Shut down because of insufficient water sources, thus ensureing that nuclear power station sea-water-desalination water producing is reliable and stable to the full extent.Filtrate Gravity filter 11
Side be additionally provided with filter tank backwash drain pipe 15 and filter tank outlet valve 21 from top to bottom, filtrate Gravity filter 11 is also by pipeline even
Connect filter tank backwashing pump 13, the setting of valve, pipeline and pump, periodically filter tank can be carried out backwash it is ensured that the normal fortune of system
Row and good effluent quality.It is filled with filtrate in filtrate Gravity filter 11, laying anthracite from top to bottom is joined according to filtrate level
23rd, quartz sand 24 and cobblestone 25, wherein anthracite 23 particle diameter are 0.8～1.6, and quartz sand 24 particle diameter is 0.5～1.2mm,
Cobblestone 25 particle diameter is 1～8mm, and the larger float of particle diameter is removed through elimination.
It is also equipped with hyperfiltration reverse-rinsing pump 17 and roots blower 18 in system, can periodically immersed ultrafiltration membrane pond 14 be carried out
Air-water backwashing, improves effluent quality further.Immersed ultrafiltration membrane pond 14 lays aeration tube, submerged ultrafiltration under film row
Pond 14 top connects hyperfiltration reverse-rinsing pump 17 by membrane cisterna backwash water pipe 7 respectively, and bottom connects Roots's wind by compressed air hose 20
Machine 18.In order to improve the service life of this pretreatment system, dosing mixing pit 3, flocculation basin 4, integrated filtering device 8 and ultrafiltration are produced
The main body in pond 19 is all using reinforced concrete structure, inner surface integral spray anti-corrosion material polyureas, the concrete contacting with sea water
Inner surface, also sprayed coating polyureas.With the metal embedded part of sea water directly contact all using super-duplex stainless steel SS2507, non-
Metal material adopt PE PVC or polyurea materials or ABS engineering plastics or nitrile rubber material.Dissolving 6, roots blower 18 are equal
Using carbon steel material, agitator 5 adopts two phase stainless steel 2507 material, and filter tank backwashing pump 13, ultrafiltration produce water pump 16 and ultrafiltration is anti-
Wash pump 17 all using excessively stream material two phase stainless steel 2507, water intaking valve 1 adopts pneumatic butterfly valve, and filter tank outlet valve 21 is using electricity
Dynamic slide valve, slide valve material is dual phase steel 2507, being capable of seawater corrosion resistance.
Embodiments of the invention 2：The accidental conditions of this technique as shown in Figure 1, Figure 2 and Figure 3, sea water is by water intaking valve 1
Flow through distributing channel 2 and flow into the dosing mixing pit 3 adding flocculant, enter flocculation basin 4 through dosing mixing pit 3 bottom and formed after alumen ustum
Enter the molten gas release area in air-dissolving air-float pond 10, mix through the microbubble mixing water that dissolved air release 9 discharges with dissolving 6, will
The microbubble producing adheres to small particle impurity float surface, makes small particle impurity float mixture proportion be slightly less than water
Proportion is simultaneously carried to the water surface by bubble, is excluded float by slag skimmer 12.Air-dissolving air-float pond 10 bottom is two filtrate gravity
Filter tank 11, does not lay anthracite 23, quartz sand 24 and cobblestone 25 according to filtrate level partition, wherein anthracite 23 particle diameter is 0.8
～1.6, quartz sand 24 particle diameter is 0.5～1.2mm, and cobblestone 25 particle diameter is 1～8mm, and the larger float of particle diameter is through filtrate
Gravity filter 11 filters and removes.It is low that sea water after filtering through air-dissolving air-float pond 10 flotation and filtrate Gravity filter 11 leans on gravity to flow into
The immersed ultrafiltration membrane pond 14 of position setting, sets ultrafiltration membrane filaments in this membrane cisterna, produces water by the ultrafiltration that is pumped to that water pump 16 is produced in ultrafiltration
Pond 19, then flows in follow-up counter-infiltration system.
Embodiments of the invention 3：As shown in Figure 1, Figure 2 and Figure 3, one of system filtrate Gravity filter 11 is shut down instead
Wash, another filter tank is normally produced water conservancy project and made, and backwash operating mode is as described below, closes water intaking valve 1, filter tank outlet valve 21, and water is produced in ultrafiltration
Enter in filter tank after filter tank backwashing pump 13 pressurization, backwash is carried out to filter tank, surface is washed less, just washing.Just washing also referred to as suitable washing, that is,
Direction according to raw water flowing is passed through rinse water and is washed.Backwash is also referred to as back washing, is passed through according to the direction contrary with stock solution
Rinse water is carried out.The whole backwash time lasts 5～10min, enters wastewater disposal basin through filter tank backwash drain pipe 15, is just washing link
After the completion of, open water intaking valve 1 and filter tank outlet valve 21, recover the normal operation of filtrate Gravity filter 11.
Embodiments of the invention 4：As shown in Figure 1, Figure 2 and Figure 3 in this system immersed ultrafiltration membrane pond 14 backwash operating mode,
Close water intaking valve 1, water pump 16 and filter tank outlet valve 21 are produced in ultrafiltration, open hyperfiltration reverse-rinsing pump 17 and roots blower 18, water is produced in ultrafiltration
Enter ultrafiltration membrane filaments through membrane cisterna backwash water pipe 7, lay aeration tube, the compressed air of compressed air under membrane cisterna bottom film row simultaneously
Pipe 20 enters membrane cisterna, carries out backwash, air-water backwashing, the whole backwash time lasts 10～15min, and backwash waste enters waste water
Pond.After the completion of backwash, open water intaking valve 1, water pump 16 and filter tank outlet valve 21 are produced in ultrafiltration, close hyperfiltration reverse-rinsing pump 17 and Roots's wind
Machine 18, recovers the normal operation of immersed ultrafiltration membrane pond 14.
Embodiments of the invention 5：As shown in Figure 1, Figure 2 and Figure 3 in this system immersed ultrafiltration membrane pond 14 Chemical cleaning
Operating mode, closes water intaking valve 1, water pump 16 and filter tank outlet valve 21 are produced in ultrafiltration, open ultrafiltration chemical cleaning pump, chemical cleaning solution enters
Membrane cisterna, discharges cleanout fluid to wastewater disposal basin, opens hyperfiltration reverse-rinsing pump 17 and carry out backwash 2 times to ultrafiltration membrane filaments, beat after soaking 1～2h
Drive water valve 1 into, water pump 16 and filter tank outlet valve 21 are produced in ultrafiltration, recover the normal operation of immersed ultrafiltration membrane pond 14, entirely chemistry
Scavenging period lasts 4h.Soak time is long, because Chemical cleaning needs to add chemicalses, when will have certain reaction
Between, and then clean calcification impurity.
The operation principle of the present invention：Sea water flows through distributing channel 2 by water intaking valve 1 and flows into the dosing mixing pit 3 adding flocculant,
Enter flocculation basin 4 through dosing mixing pit 3 bottom and form entrance air-dissolving air-float pond 10 after alumen ustum, the microbubble with dissolving 6 release
Mixing water mixes, and generation float is carried and is removed by slag skimmer 12 to water face.Air-dissolving air-float pond 10 bottom is two filtrates
Gravity filter 11, does not lay anthracite 23, quartz sand 24 and cobblestone 25 according to filtrate level partition, the larger float warp of particle diameter
Filtrate Gravity filter 11 filters and removes.Sea water after filtering through air-dissolving air-float pond 10 flotation and filtrate Gravity filter 11 leans on gravity stream
Enter the immersed ultrafiltration membrane pond 14 of low level setting, produce water pump 16 by ultrafiltration and be pumped to ultrafiltration product pond 19, then flow into follow-up
Counter-infiltration system.
Claims (10)
1. a kind of seawater desalinization pretreatment system for nuclear power station it is characterised in that include be sequentially communicated distributing channel (2),
Dosing mixing pit (3), flocculation basin (4) and integrated filtering device (8), distributing channel (2) is provided with water intaking valve (1), dosing mixing pit
(3) it is provided with agitator (5) in, integrated filtering device (8) is communicated in dissolving (6) by dissolved air release (9), synthetic filter fills
Put (8) and be communicated in ultrafiltration product pond (19) through ultrafiltration product water pump (16).
2. the seawater desalinization pretreatment system for nuclear power station according to claim 1 is it is characterised in that synthetic filter fills
Put air-dissolving air-float pond (10), filtrate Gravity filter (11) and the immersed ultrafiltration membrane pond (14) that (8) inclusion interconnects；Molten gas gas
Floating pond (10) vertical height is higher than filtrate Gravity filter (11), and filtrate Gravity filter (11) is located at air-dissolving air-float pond (10) bottom,
The vertical height of filtrate Gravity filter (11) is higher than immersed ultrafiltration membrane pond (14)；Immersed ultrafiltration membrane pond (14) top is provided with film
Pond water producing pipe (22).
3. the seawater desalinization pretreatment system for nuclear power station according to claim 2 is it is characterised in that air-dissolving air-float pond
(10) top is additionally provided with slag skimmer (12).
4. the seawater desalinization pretreatment system for nuclear power station according to claim 3 is it is characterised in that filter in this system
Material Gravity filter (11) has two, and two filtrate Gravity filters (11) interconnect.
5. the seawater desalinization pretreatment system for nuclear power station according to claim 4 is it is characterised in that filtrate gravity is filtered
The side in pond (11) is additionally provided with filter tank backwash drain pipe (15) and filter tank outlet valve (21), filtrate Gravity filter (11) from top to bottom
Connect filter tank backwashing pump (13) also by pipeline.
6. the seawater desalinization pretreatment system for nuclear power station according to claim 5 is it is characterised in that filtrate gravity is filtered
Pond is filled with filtrate in (11), is equipped with anthracite (23), quartz sand (24) and cobblestone (25), wherein anthracite from top to bottom
(23) particle diameter is 0.8～1.6, and quartz sand (24) particle diameter is 0.5～1.2mm, and cobblestone (25) particle diameter is 1～8mm.
7. the seawater desalinization pretreatment system for nuclear power station according to claim 6 is it is characterised in that also include ultrafiltration
Backwashing pump (17) and roots blower (18), immersed ultrafiltration membrane pond is provided with ultrafiltration membrane filaments in (14), and lays aeration under film row
Pipe, immersed ultrafiltration membrane pond (14) top connects hyperfiltration reverse-rinsing pump (17) by membrane cisterna backwash water pipe (7) respectively, and pressure is passed through in bottom
Contracting air hose (20) connects roots blower (18).
8. the seawater desalinization pretreatment system for nuclear power station according to claim 7 is it is characterised in that dosing mixing pit
(3), flocculation basin (4), integrated filtering device (8) and ultrafiltration produce the main body in pond (19) all using reinforced concrete structure, interior table
Polyureas is all integrally sprayed in face.
9. the seawater desalinization pretreatment system for nuclear power station according to claim 8 it is characterised in that dissolving (6),
All using carbon steel material, agitator (5) adopts two phase stainless steel 2507 material to roots blower (18)；Filter tank backwashing pump (13), super
Filter produces water pump (16) and hyperfiltration reverse-rinsing pump (17) all using excessively stream material two phase stainless steel 2507, and filter tank backwashing pump (13) is lifted
Pressure 0.2Mpa, water pump (16) and hyperfiltration reverse-rinsing pump (17) adherence pressure 0.3Mpa are produced in ultrafiltration；Water intaking valve (1) adopts Pneumatic lining
Glue butterfly valve, filter tank outlet valve (21) adopts electric brake plate valve, and slide valve material is dual phase steel 2507.
10. a kind of Pretreatment Technology of Seawater Desalination for nuclear power station, using the sea water for nuclear power station described in claim 9
Desalination pretreatment system is it is characterised in that comprise the steps：
Flocculation, sea water flows into the dosing mixing pit (3) adding flocculant, makes particle enter wadding after forming aggregation after mixing
Solidifying pond (4) produces flocculate by flocculation reaction；
Air supporting, is entered in air-dissolving air-float pond (10) and is mixed with microbubble mixing water, microbubble adheres to small particle impurity float
Surface, makes small particle impurity float be carried by bubble and excludes through slag skimmer (12) to the water surface；
Filter tank initial filter, the larger float of particle diameter filters through three-level filtrate Gravity filter (11) and removes；
Ultrafiltration, water outlet goes oil removal, colloid and microorganism by the ultrafiltration membrane filaments in immersed ultrafiltration membrane pond (14), by super
Is produced from pond (19) in the ultrafiltration that is pumped to that water pump (16) is produced in filter, then flows in follow-up counter-infiltration system；
Filter back washing, closes water intaking valve (1), filter tank outlet valve (21), and it is laggard through filter tank backwashing pump (13) pressurization that water is produced in ultrafiltration
Enter in filtrate Gravity filter (11), filter tank is carried out with backwash, surface washing, is just washing, enter through filter tank backwash drain pipe (15)
Wastewater disposal basin；
Ultrafiltration membrane pool backwash, closes water intaking valve (1), water pump (16) and filter tank outlet valve (21) are produced in ultrafiltration, open hyperfiltration reverse-rinsing
Pump (17) and roots blower (18), ultrafiltration is produced water and is entered ultrafiltration membrane filaments, the compressed air of compressed air through membrane cisterna backwash water pipe (7)
Pipe (20) enters membrane cisterna, carries out backwash, air-water backwashing, backwash waste enters wastewater disposal basin；
Ultrafiltration membrane pool Chemical cleaning, closes water intaking valve (1), water pump (16) and filter tank outlet valve (21) are produced in ultrafiltration, open ultrafiltration
Learn cleaning pump, chemical cleaning solution enters membrane cisterna, discharge cleanout fluid after soaking 1～2h to wastewater disposal basin, open hyperfiltration reverse-rinsing pump (17)
Ultrafiltration membrane filaments are carried out with backwash 2 times.
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| CN201611103318.8A CN106430739A (en) | 2016-12-05 | 2016-12-05 | Sea-water-desalination pre-treatment system and technology for nuclear power station |
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