CN101164908A - Industrialized Technique for sea water desalination and pretreatment - Google Patents
Industrialized Technique for sea water desalination and pretreatment Download PDFInfo
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- CN101164908A CN101164908A CNA2007100598316A CN200710059831A CN101164908A CN 101164908 A CN101164908 A CN 101164908A CN A2007100598316 A CNA2007100598316 A CN A2007100598316A CN 200710059831 A CN200710059831 A CN 200710059831A CN 101164908 A CN101164908 A CN 101164908A
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Abstract
This invention relates to pretreatment of sea-water for commercial desalination. In this invention, the seawater from natural sedimentation tank is pumped, and mixed with flocculent which is from flocculent tank and being after meterage by proportioning pump, into a three-step, mechanical agitation, flocculation reaction, tilted plate separator. And bacteriacide, after meterage by proportioning pump, is direct pumped into a mechanical agitating mixing pound. After mixing, flocculation, it overflows into said tilted plate separator. The upper clear liquid overflows into seawater storage tank for further purification. The waste sludge in the bottom of the tilted plate separator is discharged periodically. This invention provides a pretreatment of seawater for commercial desalination which overcomes the prior art shortcomings, with advantages of: simple process, easy operation and low cost.
Description
Technical field
The present invention relates to desalination technology, the pretreated processing method of particularly a kind of industrialization sea water desaltination.Seawater is realized seawater cleaning by unit such as sterilization, flocculation, precipitation, filtrations, and purifying the back seawater can use for industries such as sea water desaltination, industrial cycle cooling, landscape water, agricultural irrigation water, breeding waters.
Background technology
96.5% of water globe resource is the ocean salt water, only has 3.5% to be fresh water; And fresh water 2.5% is level land, polar region, has only 1% can use for human.Thereby unique hope from water scarcity to the sea that want fresh water to become to solve.
China is one of 13 countries of serious water shortage in the world, and whole nation fresh water occupancy volume per capita only is world occupancy volume per person's 1/4.Since 1970's, most of maritime nations have added the trend of sea water desaltination owing to water resources problems becomes increasingly conspicuous.Existing 125 countries in the whole world adopt the fresh water devices, have installed or the desalination water device total amount of having signed a contract is 15233, and its gross production is ten thousand stere fresh water every days 3240.China's coastal cities water resources is all comparatively deficient, and the shortage of water resources has become the bottleneck of restriction coastal cities development, and the development and use seawater resources are inevitable choices of economy and social development.
In recent years, coastal cities immediate offshore area water pollution is more serious, major cause is the great-leap-forward development along with China's economy, the industry sanitary sewage discharges in a large number, being on the increase of the continuous reinforcement of offshore oil development and dealing trade ship, emitted accident at blowdown and the race in boats and ships blowdown, overflow dirt and the offshore oil drilling process, causes the marine site severe contamination, particularly red tide repeatedly appears in the Bohai Sea, the Huanghai Sea etc. in recent years, brings heavy losses to sea farming.Therefore coastal seawater can not be directly as mariculture industry and special industry water, therefore carrying out seawater cleaning provides the high-quality purifying sea water for industry, aquaculture, agricultural, especially sea water desaltination, can reduce the production cost of industries such as industry and aquaculture greatly, increase economic efficiency, promote economic development.Setting up large-scale seawater cleaning factory and can accelerate Bohai Sea Gulf seawater circulation, reduce sea pollution, is the important behave of implementing blue sea Blue Sky Project, can form eucyclic Economic development system.
The sea water desaltination pretreatment process is a lot of both at home and abroad at present.Regional preferably for water quality, generally adopt the direct current cohesion to add multiple filtering technology:, to adopt the pretreatment technology of coagulation, precipitation, sand filtration, micro-filtration (ultrafiltration) for the relatively poor zone of water quality; For the higher marine site of organic content, also need add active carbon filtering device.Though above-mentioned technology is used in many countries and regions, be very difficult practicable in marine site, Chinese Bohai Sea Gulf.
Summary of the invention
The purpose of this invention is to provide the pretreated processing method of a kind of industrialization sea water desaltination, can overcome the deficiencies in the prior art, seawater is added flocculation agent, sterilant through automatic medicament feeding system, dark and the flocculation through the integrated multistage mechanical stirring, inclined-plate clarifying basin precipitation, sand-bed filter filtration treatment, when algae in the seawater or oils content are higher, the inclined-plate clarifying basin water outlet is handled through air flotation pool, and sand-bed filter is filtered into sea water desaltination the high-quality water inlet is provided again.Product water turbidity＜5NTU, COD clearance＞40%.Technology of the present invention is simple, processing ease, and cost is low.
The pretreated processing method of industrialization sea water desaltination provided by the invention comprises the steps:
The seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the 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.The heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
The pretreated processing method of industrialization sea water desaltination provided by the invention comprises the steps:
The seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, after mixing, flocculating, overflow is to inclined-plate clarifying basin, the overflow of inclined-plate clarifying basin supernatant liquor is to the gravity type boat davit sand-bed filter, and the sand-bed filter water outlet is to the purifying sea water storage tank, for sea water desaltination provides the high-quality water inlet.The heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
The pretreated processing method of industrialization sea water desaltination provided by the invention comprises the steps:
The seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, after mixing, flocculating, overflow is to inclined-plate clarifying basin, and the overflow of inclined-plate clarifying basin supernatant liquor is to air flotation pool, air flotation pool water outlet overflow gravity type boat davit sand-bed filter, the sand-bed filter water outlet is to the purifying sea water storage tank, for sea water desaltination provides the high-quality water inlet.The heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
Described three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins mix pond, frame stirring flocculation basin and inclined-plate clarifying basin by the isometrical turbomachine of perpendicular axis type and form.
Described mechanical stirring mixing pit or flocculation basin are provided with three cover whipping apptss respectively.Described mechanical stirring mixing pit, the residence time is no less than 5min, and mixing speed is 150～200r/min.Described mechanical stirring flocculation basin, the residence time is no less than 5min, and mixing speed is respectively 40～80r/min, 10～40r/min, 24～48h arranges a mud.
The inner reeve of described inclined-plate clarifying basin is spaced apart 50～200 millimeters swash plate.
Described flocculant addition is 20～50mg/L seawater, and the sterilant add-on is 3～8mg/L seawater, and sterilant also can adopt and per hour add once, and add-on still is 3～8mg/L seawater in Total Water per hour.Described flocculation agent is bodied ferric sulfate or iron trichloride.
Described sterilant can directly add flocculation basin, and the ejector position should add point more than 2 meters apart from sterilant.
Described flocculation basin is the series connection of level Four flocculation basin, and three-step gear shift stirs, and one-level does not have stirring, mixing speed is respectively 150～200r/min, 40～80r/min, 10～40r/min, the single-stage flocculation basin residence time is 5～8min, and 4 flocculation basin residence time are 20～30min.
Described level Four flocculation basin current move towards, and intake on first flocculation basin, and water outlet enters second flocculation basin by the bottom, the second flocculation basin overflow to the, three flocculation basins, and the 3rd flocculation basin enters the 4th flocculation basin by the bottom water outlet, and the 4th flocculation basin overflow is to inclined-plate clarifying basin.
Described inclined-plate clarifying basin surface load 3～10m
3/ (m
2/ h), the residence time is 25～50min.Inclined-plate clarifying basin mud-sinking area rectangular parallelepiped and cone junction are provided with the wash-down water coil pipe, regularly the throw out attached to the inclined-plate clarifying basin side surface are washed away.Described inclined-plate clarifying basin is the reverse flow inclined-plate clarifying basin, and inner swash plate is spaced apart 50～200 millimeters, and 8～24h arranges a mud.
Described air flotation pool should be provided with slag scraper and dissolving for larger project.
Described sand-bed filter is the quartz sand filter media gravity filter of different-grain diameter, and quartz sand loading height 700～1200mm, minimum quartz sand particle size are 0.20mm.
Processing method of the present invention is that the seawater from the natural subsidence pond is promoted through seawater lift pump, with enter three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins after the flocculation agent through volume pump metering from medicine system mixes in ejector, sterilant measures through volume pump and directly squeezes into machinery and mix the pond.These three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins mix pond, frame stirring flocculation basin and inclined-plate clarifying basin by the isometrical turbomachine of perpendicular axis type and form.Mixing pit is diffused in the seawater medicament by stirring quickly and evenly, and flocculation basin makes the little flocs unit that is produced after medicament and the sea water mixing by different stirring velocitys, be condensed within a certain period of time have good physical behavior, not breakable flocs unit; Supernatant liquid enters reverse inclined-plate clarifying basin bottom, utilizes in the reverse flow precipitation process water (flow) direction and the glaur opposite characteristics that glide, and makes water and swash plate contact surface little and be more convenient for gliding and eliminating, has improved solid-liquid separation effect.The overflow of inclined-plate clarifying basin supernatant liquor enters the purifying sea water storage tank to the gravity type boat davit sand-bed filter after sand-bed filter filters.When algae in the seawater or oils content were higher, the inclined-plate clarifying basin water outlet was through air flotation pool, and air flotation pool water outlet overflow enters the purifying sea water storage tank to the gravity type boat davit sand-bed filter after sand-bed filter filters.The inclined-plate clarifying basin delivery turbidity is general＜5NTU, and COD clearance＞40%; The sand-bed filter delivery turbidity is general＜3NTU.
Mechanical stirring mixing pit, flocculation basin are owing to be provided with three cover whipping apptss, the adjusting of different mixing speed can be adjusted submicroscopic mass transfer preferably, make the medicament hydrolyzate finish submicroscopic diffusion rapidly in several seconds, when saving flocculation agent, shortened the time of flocculation sediment greatly.Inclined-plate clarifying basin is because reeve is spaced apart a lot of swash plates of 50～200 millimeters in inside, it has increased desilting area on the one hand, on the other hand since current swash plate at interval in from bottom to top, the mud of from former water, separating that is deposited on the swash plate face, slide in the mud enrichment region of below against the surging force of water body and the gravity of mud itself, the clear water after swash plate is handled is then collected by water gathering system and is led in effluent trough.Not only improve deposition efficiency, prevented that again foam from causing the reduction of flocculation agent drug effect simultaneously.The quartz sand of variable grain diameter can effectively be removed suspended substance, colloid and molecule etc. in the inclined-plate clarifying basin supernatant liquor.Bigger, the active micro-floccule of air flotation pool algae content when water temperature is higher plays extraordinary booster action to inclined-plate clarifying basin more for a long time, effectively guarantees sand-bed filter delivery turbidity＜5NTU.
The pretreated processing method of a kind of industrialization sea water desaltination provided by the invention has overcome the deficiencies in the prior art, seawater is added flocculation agent, sterilant through automatic medicament feeding system, dark and the flocculation through the integrated multistage mechanical stirring, inclined-plate clarifying basin precipitation, sand-bed filter filtration treatment, when algae in the seawater or oils content are higher, the inclined-plate clarifying basin water outlet is handled through air flotation pool, and sand-bed filter is filtered into sea water desaltination the high-quality water inlet is provided again.Product water turbidity＜5NTU, COD clearance＞40%.Technology of the present invention is simple, processing ease, and cost is low.
Description of drawings:
Fig. 1 is flocculation, precipitation, air supporting, sand filtration process flow sheet.
Fig. 2 is flocculation, precipitation sand filtration process flow sheet.
Fig. 3 is flocculation, precipitation, air supporting, sand filtration process flow sheet.
Embodiment
As shown in the figure: 1-preliminary sedimentation tank, the 2-pump of fetching water, 3-ejector, 4 flocculation basins, 5 flocculation basins, 6 flocculation basins, 7 flocculation basins, the 8-inclined-plate clarifying basin, 9 flocculation basins stir, and 10 flocculation basins stir, and 11 flocculation basins stir, 12-sterilant jar, 13-flocculation agent jar, 14-backwashing pump, 15-sand-bed filter, 16-air flotation pool.
Seawater from the natural subsidence pond promotes through seawater lift pump, and enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins after the flocculation agent (bodied ferric sulfate) through volume pump metering from medicine system mixes in ejector, and flocculant addition is 30mg/L.Sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, and the sterilant add-on is 4mg/L.The mixing pit mixing speed is 165r/min, and the flocculation basin mixing speed is respectively 40r/min, 18r/min, and mixed flocculation pond total residence time is 25min.The inclined-plate clarifying basin residence time is 30min, and the spoil disposal time is 10h.The overflow of inclined-plate clarifying basin supernatant liquor is to air flotation pool, air flotation pool water outlet overflow gravity type boat davit sand-bed filter.The sand-bed filter water outlet is to the purifying sea water storage tank.Sand-bed filter delivery turbidity＜1.6NTU, COD clearance＞45.6%.See Fig. 1.
Seawater from the natural subsidence pond promotes through seawater lift pump, and enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins after the flocculation agent (iron trichloride) through volume pump metering from medicine system mixes in ejector, and flocculant addition is 40mg/L.Sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, and the sterilant add-on is 5mg/L., the mixing pit mixing speed is 180r/min, the flocculation basin mixing speed is respectively 50r/min, 15r/min, mixed flocculation pond total residence time is 20min.The inclined-plate clarifying basin residence time is 25min, and the spoil disposal time is 12h.The overflow of inclined-plate clarifying basin supernatant liquor is to the purifying sea water storage tank.Product water turbidity＜5NTU, COD clearance＞40.3%.See Fig. 2.
Seawater from the natural subsidence pond promotes through seawater lift pump, and enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins after the flocculation agent (bodied ferric sulfate) through volume pump metering from medicine system mixes in ejector, and flocculant addition is 25mg/L.Sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, and the sterilant add-on is 3mg/L., the mixing pit mixing speed is 150r/min, the flocculation basin mixing speed is respectively 35r/min, 12r/min, mixed flocculation pond total residence time is 30min.The inclined-plate clarifying basin residence time is 40min, and the spoil disposal time is 18h.The overflow of inclined-plate clarifying basin supernatant liquor is to the gravity type boat davit sand-bed filter.Sand-bed filter delivery turbidity＜1.5NTU, COD clearance＞43.3%.See Fig. 3.
The sea water preprocessing production method that the present invention discloses and proposes, those skilled in the art can be by using for reference this paper content, links such as appropriate change operational path realize, although method of the present invention is described by preferred embodiment, person skilled obviously can change or reconfigure method as herein described in not break away from content of the present invention, spirit and scope, realizes net result.Special needs to be pointed out is, the replacement that all are similar and change apparent to those skilled in the artly, they all are regarded as being included in spirit of the present invention, scope and the content.
Claims (10)
1. pretreated processing method of industrialization sea water desaltination, it is characterized in that it comprises the steps: the seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, after mixing, flocculating, overflow is to inclined-plate clarifying basin, the overflow of inclined-plate clarifying basin supernatant liquor is to the purifying sea water storage tank, and the heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
2. pretreated processing method of industrialization sea water desaltination, it is characterized in that it comprises the steps: the seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, after mixing, flocculating, overflow is to inclined-plate clarifying basin, the overflow of inclined-plate clarifying basin supernatant liquor is to the gravity type boat davit sand-bed filter, the sand-bed filter water outlet is to the purifying sea water storage tank, for sea water desaltination provides the high-quality water inlet; The heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
3. pretreated processing method of industrialization sea water desaltination, it is characterized in that it comprises the steps: the seawater in natural subsidence pond is promoted through lift pump, in ejector with from the flocculation agent jar, after mixing, the flocculation agent of volume pump metering enters three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins, sterilant is directly squeezed into machinery through the volume pump metering and is mixed the pond, through mixing, after the flocculation, overflow is to inclined-plate clarifying basin, the overflow of inclined-plate clarifying basin supernatant liquor is to air flotation pool, air flotation pool water outlet overflow gravity type boat davit sand-bed filter, the sand-bed filter water outlet is to the purifying sea water storage tank, for sea water desaltination provides the high-quality water inlet; The heavy mud in inclined-plate clarifying basin bottom is regularly discharged.
4. according to claim 1,2 or 3 described methods, it is characterized in that described three grades of mechanical stirring flocculation reaction inclined-plate clarifying basins mix pond, frame stirring flocculation basin and inclined-plate clarifying basin by the isometrical turbomachine of perpendicular axis type and form, described mechanical stirring mixing pit or flocculation basin are provided with three cover whipping apptss respectively.
5. according to claim 1,2 or 3 described methods, it is characterized in that inner reeve of described inclined-plate clarifying basin is spaced apart 50～200 millimeters swash plate.
6. according to claim 1,2 or 3 described methods, it is characterized in that described flocculant addition is 20～50mg/L seawater, the sterilant add-on is 3～8mg/L seawater, and add-on still is 3～8mg/L seawater in Total Water per hour.
7. according to claim 1,2 or 3 described methods, it is characterized in that described flocculation basin is the series connection of level Four flocculation basin, three-step gear shift stirs, one-level does not have stirring, mixing speed is respectively 150～200r/min, 40～80r/min, 10～40r/min, the single-stage flocculation basin residence time is 5～8min, and 4 flocculation basin residence time are 20～30min.
8. according to claim 1,2 or 3 described methods, it is characterized in that described inclined-plate clarifying basin surface load 3～10m
3/ (m
2/ h), the residence time is 25～50min; Inclined-plate clarifying basin mud-sinking area rectangular parallelepiped and cone junction are provided with the wash-down water coil pipe.
9. it is characterized in that in accordance with the method for claim 2, described sand-bed filter, quartz sand loading height 700～1200mm, minimum quartz sand particle size are 0.20mm.
10. in accordance with the method for claim 3, it is characterized in that described air flotation pool is provided with slag scraper and dissolving.
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| CNA2007100598316A CN101164908A (en) | 2007-10-11 | 2007-10-11 | Industrialized Technique for sea water desalination and pretreatment |
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| CNA2007100598316A CN101164908A (en) | 2007-10-11 | 2007-10-11 | Industrialized Technique for sea water desalination and pretreatment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838228A (en) * | 2012-08-16 | 2012-12-26 | 浙江东发环保工程有限公司 | Membrane seawater desalination pretreatment system |
| CN103224307A (en) * | 2013-04-28 | 2013-07-31 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| CN104045096A (en) * | 2014-05-04 | 2014-09-17 | 安徽盖娅环保科技有限公司 | Method for preparing sodium cyanide and lead sulfide by separation of desulfurization slag produced from sodium cyanide production by light oil pyrolysis method |
| CN104140172A (en) * | 2014-08-14 | 2014-11-12 | 中冶海水淡化投资有限公司 | Seawater desalination pretreatment method |
| CN105585225A (en) * | 2016-03-04 | 2016-05-18 | 重庆文理学院 | Multifunctional precipitation denitrification system |
| CN107555645A (en) * | 2016-07-01 | 2018-01-09 | 江苏巨昌环保集团有限公司 | Micropore floats mechanism of qi |
| CN109502814A (en) * | 2018-12-10 | 2019-03-22 | 湖南科技大学 | A kind of device handling mine water |
| CN111320295A (en) * | 2019-12-23 | 2020-06-23 | 山西国控环球工程有限公司 | Pretreatment equipment and method for advanced treatment and recycling of industrial 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 |
| CN113087042A (en) * | 2021-04-21 | 2021-07-09 | 天津国投津能发电有限公司 | Seawater pretreatment industrial water saving system capable of being switched online and method thereof |
| CN114105367A (en) * | 2021-12-09 | 2022-03-01 | 宝钢湛江钢铁有限公司 | Pretreatment process for seawater desalination |
| CN114702150A (en) * | 2022-03-30 | 2022-07-05 | 乾通环境科技(苏州)有限公司 | Pretreatment system for high-turbidity oil-containing seawater for small and medium-sized seawater desalination plants |
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2007
- 2007-10-11 CN CNA2007100598316A patent/CN101164908A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838228A (en) * | 2012-08-16 | 2012-12-26 | 浙江东发环保工程有限公司 | Membrane seawater desalination pretreatment system |
| CN103224307A (en) * | 2013-04-28 | 2013-07-31 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| CN104045096B (en) * | 2014-05-04 | 2016-05-18 | 安徽盖娅环保科技有限公司 | A kind of method of producing Cymag and vulcanized lead with the desuifurized separation that light oil cracking method production Cymag produces |
| CN104045096A (en) * | 2014-05-04 | 2014-09-17 | 安徽盖娅环保科技有限公司 | Method for preparing sodium cyanide and lead sulfide by separation of desulfurization slag produced from sodium cyanide production by light oil pyrolysis method |
| CN104140172A (en) * | 2014-08-14 | 2014-11-12 | 中冶海水淡化投资有限公司 | Seawater desalination pretreatment method |
| CN104140172B (en) * | 2014-08-14 | 2015-12-02 | 中冶海水淡化投资有限公司 | A kind of Seawater desalination pretreatment method |
| CN105585225B (en) * | 2016-03-04 | 2018-02-16 | 重庆文理学院 | Multi-functional precipitation denitrification system |
| CN105585225A (en) * | 2016-03-04 | 2016-05-18 | 重庆文理学院 | Multifunctional precipitation denitrification system |
| CN107555645A (en) * | 2016-07-01 | 2018-01-09 | 江苏巨昌环保集团有限公司 | Micropore floats mechanism of qi |
| CN109502814A (en) * | 2018-12-10 | 2019-03-22 | 湖南科技大学 | A kind of device handling mine water |
| CN111320295A (en) * | 2019-12-23 | 2020-06-23 | 山西国控环球工程有限公司 | Pretreatment equipment and method for advanced treatment and recycling of industrial 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 |
| CN113087042A (en) * | 2021-04-21 | 2021-07-09 | 天津国投津能发电有限公司 | Seawater pretreatment industrial water saving system capable of being switched online and method thereof |
| CN114105367A (en) * | 2021-12-09 | 2022-03-01 | 宝钢湛江钢铁有限公司 | Pretreatment process for seawater desalination |
| CN114105367B (en) * | 2021-12-09 | 2023-10-13 | 宝钢湛江钢铁有限公司 | Pretreatment process for sea water desalination |
| CN114702150A (en) * | 2022-03-30 | 2022-07-05 | 乾通环境科技(苏州)有限公司 | Pretreatment system for high-turbidity oil-containing seawater for small and medium-sized seawater desalination plants |
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