CN102838228B - Membrane seawater desalination pretreatment system - Google Patents
Membrane seawater desalination pretreatment system Download PDFInfo
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- CN102838228B CN102838228B CN2012102909734A CN201210290973A CN102838228B CN 102838228 B CN102838228 B CN 102838228B CN 2012102909734 A CN2012102909734 A CN 2012102909734A CN 201210290973 A CN201210290973 A CN 201210290973A CN 102838228 B CN102838228 B CN 102838228B
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- 239000013535 sea water Substances 0.000 title claims abstract description 75
- 239000012528 membrane Substances 0.000 title abstract description 9
- 238000010612 desalination reaction Methods 0.000 title abstract description 8
- 238000005189 flocculation Methods 0.000 claims abstract description 60
- 230000016615 flocculation Effects 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000010802 sludge Substances 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical group Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 2
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 3
- 229910017053 inorganic salt Inorganic materials 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000011001 backwashing Methods 0.000 abstract 1
- 239000008394 flocculating agent Substances 0.000 abstract 1
- 239000013049 sediment Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000002203 pretreatment Methods 0.000 description 6
- 239000003643 water by type Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 235000019600 saltiness Nutrition 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002481 rotproofing Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the field of seawater desalination, in particular to a membrane seawater desalination pretreatment system. The invention mainly solves the technical problems that in the prior art, the water quality of effluent subjected to seawater desalination pretreatment is poor, the dirt blockage of a membrane treatment system can be accelerated after a device in the prior art operates for a long time, the operation is complex, a pretreatment dosing system needs to be linked with the water quality and a flocculating agent generates the post-flocculation phenomenon in the membrane treatment system to cause the results that inorganic salt deposit is generated by a membrane in short time, the service life is influenced and the like. A method disclosed by the invention comprises the following steps of: seawater boosting, water supply and medicine addition, flocculation reaction, inclined plate precipitation, tail-end filtration, filter backwashing and sludge discharge. A crossed panel separator reactor is arranged in a mesh flocculation reaction tank.
Description
Technical field
The present invention relates to a kind of sea water desaltination field, especially relate to a kind of embrane method sea water desaltination pretreatment system.
Background technology
Along with the fast development of sea water desaltination industry, the reverse osmosis membrane desalination technology is with its lower operation energy consumption, effluent quality reliably, and the advantages such as full-automatic operation, be widely used in the China coast city.Reverse osmosis system is as the core component of sea water desalinization, and to having relatively high expectations of influent quality, the treatment effect of sea water preprocessing system, will play very crucial effect to the success or failure of reverse osmosis membrane seawater desalination system.
Conventional sea water preprocessing generally adopts the flocculation reaction deposition pool process at present.Yet seawater quality is not only larger with seasonal fluctuation; also be subject to simultaneously the every day of the impact of twice morning and evening tides sooner or later; turbidity of sea water can fluctuate usually in a big way; in the zone of reasonableness that the reaction settling basin effluent quality can't be steady in a long-term; increased the operating load of subsequent film treatment system; make cleaning frequency membrane increase, shorten work-ing life.
Therefore,, in order to guarantee the steady running of subsequent film treatment system, need to be optimized design to pre-treatment.Chinese patent discloses a kind of sea water desaltination pretreatment process and equipment, and (publication number: CN101215061), its pretreatment process adopts ozone-ultraviolet line concurrent disinfection, enhanced coagulation and precipitates and integrated seawater carried out pre-treatment.Chinese patent also disclose the pretreated processing method of a kind of industrialization sea water desaltination (publication number: CN101164908) "; it promotes the seawater in natural subsidence pond through lift pump; entering three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins in ejector with from the flocculation agent tank after the flocculation agent of volume pump metering mixes; sterilant is directly squeezed into machinery through the volume pump metering and is uniformly mixed pond; after mixing, flocculating; overflow is to inclined-plate clarifying basin, and the overflow of inclined-plate clarifying basin supernatant liquor is to the purifying sea water storage tank.Mainly there is following problem in existing treatment process: effluent quality is poor: common reaction settling basin is processed seawater, delivery turbidity is usually in the 20NTU left and right, in the situation that the seawater quality fluctuation, turbidity may be elevated to 50NTU, and the long-time running meeting is accelerated the dirt of film processing system and blocked up; Operation is complicated: seawater quality is all fluctuating every day in a big way, and the pre-treatment medicine system need to link with water quality.Due to reaction settling basin reaction and the impact of the residence time, the adjusting of dosing always lags behind the conversion of water quality, and the system operation of making is comparatively complicated; Rear flocculation phenomenon occurs: for guaranteeing the pre-treatment effluent quality, rear flocculation phenomenon occurs in the excessive flocculation agent that adds in reaction settling basin, unreacted flocculation agent completely in film processing system, cause film to produce at short notice inorganic salt crust, affects work-ing life.
Summary of the invention
The present invention is to provide a kind of embrane method sea water desaltination pretreatment system, it is mainly that the pretreated effluent quality of the solution existing sea water desaltination of prior art is poor, the long-time running meeting is accelerated the dirt of film processing system and is blocked up, operation is complicated, the pre-treatment medicine system need to link with water quality, and flocculation agent occurs in film processing system after, the flocculation phenomenon, cause film to produce at short notice inorganic salt crust, affects the technical problem in work-ing life etc.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of embrane method sea water desaltination pretreatment system of the present invention is characterized in that described system comprises:
A. seawater boosts: be stored in the seawater in the former pond of seawater,, by sea water booster pump, be transported to the grid flocculation reaction tank;
B. the dosing of feeding water: on reaction tank advancing water pipeline, static line mixer is set,, by the dosing volume pump, adds flocculation agent and sterilant;
C. flocculation reaction: seawater carries out flocculation reaction in grid flocculation, generates alumen ustum;
D. sloping plate deposition: by the ripple inclined-plate clarifying basin, alumen ustum is through gravity settling, and water outlet flows automatically to the V-type filter tank;
E. end filters: the seawater gravity flow, through the V-type filter tank, further reduces delivery turbidity and suspended substance, produces the water gravity flow and enters the seawater clean water basin;
F. filter tank backwash: combined water and air backwash after operation for some time, is regularly carried out in the V-type filter tank, guarantees effluent quality;
G. mud discharging: the regular spoil disposal of ripple inclined-plate clarifying basin and V-type filter tank, muddy water enters the sludge sump subsequent disposal.
V-type filter tank treatment process is set after the ripple inclined-plate clarifying basin, homogeneous filtering material by the V-type filter tank, further reduce delivery turbidity and suspended substance, whole sea water preprocessing system delivery turbidity is reached below 5NTU, be far superior to the influent quality requirement of subsequent film treatment system.
For preventing sea-water corrosion, the pre-treatment principal facility all adopts the ground type skeleton construction, and the semi-underground type skeleton construction is adopted in pond, and rotproofing is done in inside.Equipment in reaction settling basin, all adopt the corrosion resistant materials such as glass reinforced plastic or PE as grid reaction device, swash plate etc.
As preferably, described grid flocculation reaction tank and ripple inclined-plate clarifying basin adopt concrete structures, and the pond body is built jointly, save floor space.
As preferably, be provided with cross fin piece partition plate reactor in described grid flocculation reaction tank, cross fin piece partition plate reactor comprises many PE pipes, is fixed with criss-cross PE fin on the PE pipe, the PE fin on all PE pipes forms grid type.Cross fin piece partition plate reactor can be strengthened the waterpower mixing effect, strengthens the alumen ustum cohesion, makes flocculation reaction more abundant.
, as preferably, be provided with closely spaced ripple swash plate in described ripple inclined-plate clarifying basin.Alumen ustum precipitation distance is obviously reduced, flow resistance is increased, in settling tank, flow distribution is even, improves settling condition, improves sedimentation effect.
As preferably, add flocculation agent and sterilant in described static line mixer, flocculation agent is iron trichloride, sterilant is clorox.
As preferably, the filtrate in described V-type filter tank is individual layer homogeneous quartz sand filter media.
As preferably, the flocculation time 10-14min of described former water in the grid flocculation reaction tank, the ripple inclined-plate clarifying basin residence time is 20-40min, upflow velocity is 2.0-2.5mm/s, surface load 8-9m
3/ m
2/ h.
Therefore, the present invention is by arranging cross grid reaction device and little spacing ripple swash plate, improve treatment effect and the shock-resistant ability of reaction settling basin, can better adapt to the fluctuation of seawater quality, the predigested running operation, arrange the V-type filter tank after reaction settling basin, make and do not precipitate alumen ustum completely and obtain filtration treatment, effectively reduce the risk of rear flocculation, more than extending ultra-filtration membrane cleaning interval to 3 month, reduce operation and maintenance cost; Improve effluent quality, turbidity is dropped to below 5NUT by common 20NUT, met the influent quality requirement of seawater desalination system by film method fully, can realize the long-term stability operation of seawater desalination system.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is a kind of structural representations of cross fin piece partition plate reactor of the present invention.
Component, position and numbering in figure: the former pond 1 of seawater, sea water booster pump 2, grid flocculation reaction tank 3, static line mixer 4, ripple inclined-plate clarifying basin 5, V-type filter tank 6, seawater clean water basin 7, PE pipe 8, PE fin 9, ripple swash plate 10.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: this technique of application in the six Heng Dao marine site projects of Zhoushan.Surrounding waters, factory site salinity mainly is subjected to weather effect, and the seawater saltiness is 27000～31000mg/L approximately.Surrounding waters, factory site sediment source be mainly the Changjiang river come husky, winter sediment concentration greater than summer, according to relevant hydrometry data, surrounding waters, factory site mean lower low water spring sediment concentration is 0.217kg/m
3, ebb tide actual measurement sediment concentration is 0.554kg/m
3～0.079kg/m
3, after maximum sediment concentration generally appears at rise urgency or the urgency that falls within the tide cycle.
A kind of embrane method sea water desaltination pretreatment system of this example, as Fig. 1, its treatment step is:
A. seawater boosts: be stored in the seawater in the former pond 1 of seawater,, by sea water booster pump 2, be transported to grid flocculation reaction tank 3;
B. the dosing of feeding water: static line mixer 4 is set on reaction tank advancing water pipeline,, by the dosing volume pump, adds flocculation agent and sterilant, wherein flocculation agent is iron trichloride, and sterilant is clorox;
C. flocculation reaction: seawater carries out flocculation reaction in grid flocculation, generate alumen ustum, be provided with cross fin piece partition plate reactor in the grid flocculation reaction tank, as Fig. 2, cross fin piece partition plate reactor comprises many PE pipes 8, be fixed with criss-cross PE fin 9 on the PE pipe, the PE fin on all PE pipes forms grid type, the flocculation time 12min of the former water after dosing in the grid flocculation reaction tank;
D. sloping plate deposition: by ripple inclined-plate clarifying basin 5, alumen ustum is through gravity settling, and water outlet flows automatically to V-type filter tank 6, the residence time 35min of ripple inclined-plate clarifying basin wherein, upflow velocity 2.2mm/s, surface load 7.9m
3/ m
2/ h;
E. end filters: the seawater gravity flow is through V-type filter tank 6, and V-type filter tank design filtering velocity is 8.3m/h, adopts individual layer homogeneous quartz sand filter media, thickness is 1.2m, effective size of grain is 0.90-1.20mm, further reduces delivery turbidity and suspended substance, produces the water gravity flow and enters seawater clean water basin 7;
F. filter tank backwash: combined water and air backwash after operation for some time, is regularly carried out in V-type filter tank 6, guarantees effluent quality;
G. mud discharging: the regular spoil disposal of ripple inclined-plate clarifying basin 5 and V-type filter tank 6, muddy water enters the sludge sump subsequent disposal.
Adopt HACH 2100N turbidimeter, the detection system rear water quality situation that puts into operation.The reaction settling basin delivery turbidity is generally 18NUT, and V-type filter tank delivery turbidity is less than 5NTU.
Embodiment 2: surrounding waters, factory site, Xiangshan, Ningbo seawater saltiness is 28000～32000mg/L approximately, and surrounding waters mean lower low water spring sediment concentration is 0.242kg/m
3, ebb tide actual measurement sediment concentration is 0.563kg/m
3～0.08k2g/m
3, after maximum sediment concentration generally appears at rise urgency or the urgency that falls within the tide cycle.
A kind of embrane method sea water desaltination pretreatment system of this example, as Fig. 1, its treatment step is:
A. seawater boosts: be stored in the seawater in the former pond 1 of seawater,, by sea water booster pump 2, be transported to grid flocculation reaction tank 3;
B. the dosing of feeding water: static line mixer 4 is set on reaction tank advancing water pipeline,, by the dosing volume pump, adds flocculation agent and sterilant, wherein flocculation agent is iron trichloride, and sterilant is clorox;
C. flocculation reaction: seawater carries out flocculation reaction in grid flocculation, generate alumen ustum, as Fig. 2, be provided with cross fin piece partition plate reactor in the grid flocculation reaction tank, as Fig. 2, cross fin piece partition plate reactor comprises on many PE pipe 8, PE pipes and is fixed with criss-cross PE fin 9, PE fin on all PE pipes forms grid type, the flocculation time 12min of the former water after dosing in the grid flocculation reaction tank;
D. sloping plate deposition: by ripple inclined-plate clarifying basin 5, alumen ustum is through gravity settling, and water outlet flows automatically to V-type filter tank 6, the residence time 30min of ripple inclined-plate clarifying basin wherein, upflow velocity 2.2mm/s, surface load 8.0m3/m2/h;
E. end filters: the seawater gravity flow is through V-type filter tank 6, and V-type filter tank design filtering velocity is 8.3m/h, adopts individual layer homogeneous quartz sand filter media, thickness is 1.2m, effective size of grain is 0.90-1.20mm, further reduces delivery turbidity and suspended substance, produces the water gravity flow and enters seawater clean water basin 7;
F. filter tank backwash: combined water and air backwash after operation for some time, is regularly carried out in V-type filter tank 6, guarantees effluent quality;
G. mud discharging: the regular spoil disposal of ripple inclined-plate clarifying basin 5 and V-type filter tank 6, muddy water enters the sludge sump subsequent disposal.
Adopt HACH 2100N turbidimeter, the detection system rear water quality situation that puts into operation.The reaction settling basin delivery turbidity is generally 20NUT, and V-type filter tank delivery turbidity is less than 5NTU.
Comparative Examples: the Leqing Bay sea water salinity is subjected to the impact of Zhejiang coastal stream and Taiwan Warm Current, shows as Xia Gaodong low.According to the bank door ocean station data of gulf mouth, maximum salinity 34.4 ‰, appear at summer; Minimum 20.34 ‰, appear at winter.The turbidity near power station marine site changes also quite greatly, can change to thousands of (NTU) by tens within one hour, causes that wherein the essential substance that turbidity changes is the silty clay that suspends.
Seawater enters former pond through circulating pipe, enter reaction settling basin after boosting pump, front static line mixer adds flocculation agent and sterilant by intaking, planning grid flocculation tank flocculation time 12min, inclined-plate clarifying basin residence time 30min, upflow velocity 2.3mm/s, surface load 8.2m3/m2/h.The plastic grid reactor is set in the grid flocculation reaction tank, conventional plastics swash plate is set in the ripple inclined-plate clarifying basin.
Adopt HACH 2100N turbidimeter, the detection system rear water quality situation that puts into operation.The reaction settling basin delivery turbidity is usually in the 20NUT left and right, in the situation that the seawater quality fluctuation, effluent quality worsens to some extent.
The foregoing is only specific embodiments of the invention, but constitutional features of the present invention is not limited to this, any those skilled in the art is in the field of the invention, and the variation of doing or modification all are encompassed among the scope of the claims of the present invention.
Claims (6)
1. embrane method sea water desaltination pretreatment system is characterized in that described system comprises:
A. seawater boosts: be stored in the seawater in the former pond of seawater (1),, by sea water booster pump (2), be transported to grid flocculation reaction tank (3);
B. the dosing of feeding water: static line mixer (4) is set on reaction tank advancing water pipeline,, by the dosing volume pump, adds flocculation agent and sterilant;
C. flocculation reaction: seawater carries out flocculation reaction in grid flocculation, generate alumen ustum, be provided with cross fin piece partition plate reactor in grid flocculation reaction tank (3), cross fin piece partition plate reactor comprises many PE pipes (8), be fixed with criss-cross PE fin (9) on the PE pipe, the PE fin on all PE pipes forms grid type;
D. sloping plate deposition: by ripple inclined-plate clarifying basin (5), alumen ustum is through gravity settling, and water outlet flows automatically to V-type filter tank (6), is provided with closely spaced ripple swash plate (10) in ripple inclined-plate clarifying basin (5);
E. end filters: the seawater gravity flow, through V-type filter tank (6), further reduces delivery turbidity and suspended substance, produces the water gravity flow and enters seawater clean water basin (7);
F. filter tank backwash: V-type filter tank (6) after operation for some time, regularly carry out combined water and air backwash, guarantee effluent quality;
G. mud discharging: ripple inclined-plate clarifying basin (5) and V-type filter tank (6) are spoil disposal regularly, and muddy water enters the sludge sump subsequent disposal.
2. a kind of embrane method sea water desaltination pretreatment system according to claim 1, is characterized in that described grid flocculation reaction tank (3) and ripple inclined-plate clarifying basin (5) adopt concrete structures.
3. a kind of embrane method sea water desaltination pretreatment system according to claim 1, is characterized in that adding flocculation agent and sterilant in described static line mixer (4), and flocculation agent is iron trichloride, and sterilant is clorox.
4. a kind of embrane method sea water desaltination pretreatment system according to claim 1, is characterized in that the filtrate in described V-type filter tank (6) is individual layer homogeneous quartz sand filter media.
5. a kind of embrane method sea water desaltination pretreatment system according to claim 1, it is characterized in that the flocculation time 10-14min of former water in grid flocculation reaction tank (3) after described dosing, ripple inclined-plate clarifying basin (5) residence time is 20-40min, upflow velocity is 2.0-2.5mm/s, surface load 8-9m
3/ m
2/ h.
6. a kind of embrane method sea water desaltination pretreatment system according to claim 1, is characterized in that described V-type filter tank (6) adopts regular backwash, and backwash process is that gas punching, air water recoil simultaneously, three steps of water punching.
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| CN104692557A (en) * | 2014-12-22 | 2015-06-10 | 内蒙古久科康瑞环保科技有限公司 | Chemical pretreatment method and device thereof for treating high-salinity wastewater |
| CN105565405B (en) * | 2016-02-26 | 2018-01-19 | 徐州工程学院 | A kind of vertical Quick purifying device and its process for purifying water |
| CN106082505A (en) * | 2016-08-19 | 2016-11-09 | 北京今大禹环境技术股份有限公司 | The seawater desalinization pretreatment system that a kind of sea water is divided and ruled |
| CN108928968B (en) * | 2018-08-17 | 2022-01-04 | 沧州临港中科保生物科技有限公司 | Multifunctional sea water desalting salting-out device |
| CN111217474A (en) * | 2019-11-25 | 2020-06-02 | 天津大学 | Coagulation membrane filtration process optimization method aiming at 'post-flocculation' phenomenon |
| CN111302527A (en) * | 2020-02-21 | 2020-06-19 | 宁夏水投环保发展有限公司 | Novel corridor type treatment process and operation method for coal gasification fluorine-containing wastewater |
| CN112520903A (en) * | 2020-12-18 | 2021-03-19 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Seawater desalination pretreatment system and use method thereof |
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| CN2470347Y (en) * | 2001-03-19 | 2002-01-09 | 中国人民解放军后勤工程学院 | Sea water desalting apparatus |
| CN100577577C (en) * | 2005-03-25 | 2010-01-06 | 池万清 | Pre-treating method for desalting sea water |
| CN101164908A (en) * | 2007-10-11 | 2008-04-23 | 马敬环 | Industrialized Technique for sea water desalination and pretreatment |
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