CN203269702U - Pretreating device for sea water desalination - Google Patents
Pretreating device for sea water desalination Download PDFInfo
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- CN203269702U CN203269702U CN 201320229307 CN201320229307U CN203269702U CN 203269702 U CN203269702 U CN 203269702U CN 201320229307 CN201320229307 CN 201320229307 CN 201320229307 U CN201320229307 U CN 201320229307U CN 203269702 U CN203269702 U CN 203269702U
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Abstract
The utility model discloses a pretreating device for sea water desalination. The pretreating device comprises a pretreating integrated system, wherein the pretreating integrated system comprises a water intaking pump, a dosing device, a hydraulic clarifying tank, a quartz-sand filter, an active-carbon filter and a safety filter which are connected by pipelines. The pretreating device disclosed by the utility model has the advantages that since a ferric-trichloride coagulant is connected with quartz sand and active carbon in series for filtering, the desalination rate to sea water can reach 40-45%, so that the salt content of water entering an electric absorption device is greatly reduced, the load of electric absorption is reduced, the energy consumption of electric absorption is reduced and the operating cost is low.
Description
Technical field
The utility model relates to a kind of sea water desalinating plant, relates in particular to the sea water desaltination pretreatment unit in sea water desalinating plant.
Background technology
Shortage day by day along with China's Freshwater resources, the embrane method sea water desaltination was particularly used in coastal iron and steel enterprise by the time more and more widely in coastal enterprise in recent years, reverse osmosis technology with respect to other desalination technology have reduced investment, energy consumption is low, the construction period is short, be easy to the advantage such as automatically control, becomes gradually the dominant technology of sea water desaltination.Because seawater has been subject to pollution, its turbidity and organic contamination substrate concentration are higher, and contain multiple-microorganism, easily reverse osmosis membrane are polluted, cause water production rate and ratio of desalinization to descend, therefore need take effective pre-treatment measure can steady in a long-term to move to guarantee it; Owing to containing higher calcium, magnesium ion in seawater, for avoiding reverse osmosis membrane fouling, need to add a certain amount of Scale inhibitors in seawater again, present domestic antisludging agent for osmosis-reverse membrane major part is take import as main, and is expensive.
Sea water preprocessing adopts the conventional arts such as oxidation disinfection, aluminate coagulating precipitation, cascade filtration, reduction dechlorination usually at present, effect to reduction turbidity of sea water, the pre-desalination of seawater is not high, advanced treatment need to design second level reverse osmosis apparatus, also has the following disadvantages simultaneously: the defectives such as technique is tediously long, operation is loaded down with trivial details, working cost is high, energy consumption is high.Therefore, people extremely thirst for occurring a kind of stable, sea water desaltination pretreatment unit that desalination effect, working cost are low, energy consumption is low that tool is certain.
The utility model content
Technical problem to be solved in the utility model just is to provide a kind of sea water desaltination pretreatment unit, has that desalination is effective, working cost is low, low power consumption and other advantages.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of sea water desaltination pretreatment unit, it is characterized in that: comprise the pre-treatment integrated system, described pre-treatment integrated system comprises water pump, chemicals dosing plant, water clarifier, quartz filter, activated charcoal filter and the cartridge filter that connects successively by pipeline; The external seawater water tank of the import of water pump or seawater water intake well;
Described chemicals dosing plant comprises coagulant drug-adding device and sterilant chemicals dosing plant, and described coagulating agent is iron trichloride, and described sterilant is one or more in liquid chlorine, clorox or dioxide peroxide.The alumina blossom particles discreteness that the iron trichloride coagulating agent forms in water is strong, and therefore denser, and positively charged many can generate throw out with multiple high valence ion generation chemical reaction in water, then through after the road strainer filter removal.
Improved, described sea water desaltination pretreatment unit also comprises an adsorption system, and the purifying sea water after described electro-adsorption system is used for the pre-treatment integrated system is processed is done further desalination and processed, and removes the calcium-magnesium removing plasma simultaneously.The electro-adsorption system is several electro-adsorption modules by being connected in parallel, and described electro-adsorption module comprises that the electrode slice, left and right end plate and the bracing frame that are connected in series form; Described electrode slice is paired positive electrode and negative electrode, and anodic-cathodic is connected with external source by the joint on electrode slice; Described first member plate is provided with water-in, and described water-in is connected with the water outlet of cartridge filter, and described right end plate is provided with water outlet.
As preferably, the large flux foldable filter element of the in-built 5 μ m of described cartridge filter.
The beneficial effects of the utility model:
What 1, adopt is that the iron trichloride coagulating agent adds series connection quartz sand and activated carbon filtration, can reach 40～45% to the desalination rate of seawater, and the water quality saltiness that enters the electro-adsorption device is reduced greatly, has alleviated the burden of electro-adsorption, the energy consumption of reduction electro-adsorption.
2, adopt the pre-desalting plant of electro-adsorption, ratio of desalinization can reach more than 50%, and is especially high to the Cl-decreasing ratio, also good to fluorine, calcium, magnesium ion clearance effect.The electro-adsorption system has better tolerance, the core component long service life; Non-secondary pollution, running cost is low; Belong to atmospheric operation, the characteristics such as energy consumption is low.
3, adopt parallel electro-adsorption module, the control by Controlling System makes the electro-adsorption module carry out one by one desorption and regeneration, carries out when can realize electro-adsorption regeneration and operation, has improved processing efficiency, makes the utilization of continous way electro-adsorption system become possibility.
Description of drawings
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the Application Example structural representation of the utility model sea water desaltination pretreatment unit.
Fig. 2 is the structural representation of electro-adsorption system in Fig. 1.
Embodiment
As Fig. 1 and Fig. 2, for the utility model sea water desaltination pretreatment unit is applied in a kind ofly based on the embodiment on the sea water desalinating plant of continous way electro-adsorption technique, described sea water desalinating plant based on continous way electro-adsorption technique comprises pre-treatment integrated system, electro-adsorption system, reverse osmosis system.
As shown in Figure 1, described pre-treatment integrated system adopts enhanced coagulation and cascade filtration technique, is mainly used in removing opacity, organism and part salinity etc. in seawater.The pre-treatment integrated system comprises water pump 1, chemicals dosing plant, water clarifier 2, quartz filter 3, activated charcoal filter 4 and the cartridge filter 5 that connects successively by pipeline; The external seawater water intake well of the import of water pump 1; Chemicals dosing plant comprises coagulant drug-adding device 6 and sterilant chemicals dosing plant 7, and coagulating agent is iron trichloride, and sterilant is liquid chlorine; The large flux foldable filter element of the in-built 5 μ m of cartridge filter 5.
As depicted in figs. 1 and 2, the purifying sea water after described electro-adsorption system is used for the pre-treatment integrated system is processed is done further desalination and is processed, and removes the calcium-magnesium removing plasma simultaneously.The electro-adsorption system is several electro-adsorption modules 8 by being connected in parallel, and electro-adsorption module 8 comprises that the electrode slice 9, first member plate 10, right end plate 11 and the bracing frame 12 that are connected in series form; Electrode slice 9 is paired positive electrode and negative electrode, and anodic-cathodic is connected with external source by the joint on electrode slice 9; First member plate 10 is provided with water-in 13, and water-in 13 is connected with the water outlet of cartridge filter 5, and right end plate 11 is provided with water outlet 14.What electrode materials adopted is the matrix material of CNT (carbon nano-tube) and gac.Each electro-adsorption module 8 of electro-adsorption system is equipped with dense water outlet pipeline 15, and described dense water outlet pipeline 15 is provided with magnetic valve 16.Described electrode slice material is the compound electric pole piece that a kind of carbon dioxide process carbon electrode in gac, charcoal-aero gel, CNT (carbon nano-tube) or several carbon dioxide process carbon electrode combine.
As Fig. 1, the seawater after described reverse osmosis system is used for the electro-adsorption system is processed is done deep desalting treatment, obtains desalination water.Reverse osmosis system comprises chemicals dosing plant 17, high-pressure pump 18, the RO membrane module 19 that connects successively by pipeline and produces water tank 20.The RO film that RO membrane module 19 adopts is the common RO film of low pressure.
Principle of work:
Start water pump 1, sea-water pump in water intake well is entered waterpower settling pond 2, add the iron trichloride coagulating agent in the water inlet pipe of water clarifier 2, carry out coagulation pretreatment, remove its opacity, partial organic substances and metal etc., add simultaneously sterilant, kill the microorganisms such as planktonic organism, bacterium and virus in seawater, after seawater precipitates in water clarifier 2, supernatant liquor is through quartz filter 3 and the activated charcoal filter 4 of series connection, remove microorganism corpse, suspended substance and colloidalmaterial, then through cartridge filter 5 essence filters, get purifying sea water.Evidence adopts iron trichloride to make coagulating agent, simultaneously after the road strainer adopt quartz filter 3 series connection activated charcoal filters 4, can reach 40～45% to the desalination rate of seawater.
The pre-treatment water outlet is sent into the electro-adsorption system and is carried out pre-desalting treatment, by external dc power supply, anodic-cathodic is conducted electricity, make electrode produce positive and negative charge, the ion in the seawater that passes through or charged particle be respectively by the electrode adsorption of oppositely charged, thereby reach the effect of desalination.The electro-adsorption system can remove the saltiness more than 50%, and is 60% left and right to the clearance of hardness, is 40% left and right to the clearance of COD.After electrode adsorption reaches capacity, direct supply is removed, and with the positive and negative electrode short circuit, the ion that is adsorbed on electrode surface is come back in passage, to discharge with current, dense water is collected with dense water outlet pipeline 15 dischargings, and electrode is regenerated thus.The electro-adsorption system adopts the structure of a plurality of electro-adsorption module 8 parallel connections, by the control of Controlling System, electro-adsorption module 8 is carried out desorption and regeneration one by one, carries out when can realize electro-adsorption regeneration and operation, has improved processing efficiency, reaches the effect of continuous operation.
The water outlet of electro-adsorption system is sent into low pressure reverse osmosis assembly 19 by high-pressure pump 18 after chemicals dosing plant 17 dosings, remove the saltiness more than 97%, produces water and sends into 20 storages of product water tank.
Table 1 seawater quality and effluent quality
| Sequence number | Project | Seawater quality | Effluent quality | Drinking water standard |
| 1 | PH | 7.9-8.4 | 8.0 | 6.5-8.5 |
| 2 | Turbidity (NTU) | 20 | <0.5 | <1 |
| 3 | TDS(mg/l) | 30265 | <500 | <1000 |
| 4 | COD(mg/l) | 3 | <0.3 | <3 |
| 5 | Cl -(mg/l) | 19000 | <150 | <250 |
As shown in table 1, after the sea water desalinating plant of the utility model based on continous way electro-adsorption technique, effluent quality satisfies drinking water standard with seawater.
Claims (5)
1. sea water desaltination pretreatment unit, it is characterized in that: comprise the pre-treatment integrated system, described pre-treatment integrated system comprises water pump, chemicals dosing plant, water clarifier, quartz filter, activated charcoal filter and the cartridge filter that connects successively by pipeline.
2. sea water desaltination pretreatment unit according to claim 1, it is characterized in that: also comprise the electro-adsorption system, described electro-adsorption system is several electro-adsorption modules by being connected in parallel, and described electro-adsorption module comprises that the electrode slice, left and right end plate and the bracing frame that are connected in series form; Described electrode slice is paired positive electrode and negative electrode, and anodic-cathodic is connected with external source by the joint on electrode slice; Described first member plate is provided with water-in, and described water-in is connected with the water outlet of cartridge filter, and described right end plate is provided with water outlet.
3. sea water desaltination pretreatment unit according to claim 1 and 2, it is characterized in that: described chemicals dosing plant comprises coagulant drug-adding device and sterilant chemicals dosing plant.
4. sea water desaltination pretreatment unit according to claim 1 and 2, is characterized in that: the large flux foldable filter element of the in-built 5 μ m of described cartridge filter.
5. sea water desaltination pretreatment unit according to claim 2 is characterized in that: described electro-adsorption system also is provided with dense water outlet pipeline, and described dense water outlet pipeline is provided with magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229307 CN203269702U (en) | 2013-04-28 | 2013-04-28 | Pretreating device for sea water desalination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229307 CN203269702U (en) | 2013-04-28 | 2013-04-28 | Pretreating device for sea water desalination |
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| CN203269702U true CN203269702U (en) | 2013-11-06 |
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| CN 201320229307 Expired - Fee Related CN203269702U (en) | 2013-04-28 | 2013-04-28 | Pretreating device for sea water desalination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108928968A (en) * | 2018-08-17 | 2018-12-04 | 卢响锋 | A kind of multifunctional seawater desalting salt analysis apparatus |
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2013
- 2013-04-28 CN CN 201320229307 patent/CN203269702U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108928968A (en) * | 2018-08-17 | 2018-12-04 | 卢响锋 | A kind of multifunctional seawater desalting salt analysis apparatus |
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Granted publication date: 20131106 Termination date: 20210428 |
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