CN204111474U

CN204111474U - A kind of seawater cleaning reverse osmosis unit

Info

Publication number: CN204111474U
Application number: CN201420579406.5U
Authority: CN
Inventors: 陈传好; 单双武
Original assignee: Qingdao Nanche Huaxuan Water Affair Co Ltd
Current assignee: Qingdao Zhongche Huaxuan Water Company Limited
Priority date: 2014-10-08
Filing date: 2014-10-08
Publication date: 2015-01-21
Anticipated expiration: 2024-10-08

Abstract

A kind of seawater cleaning reverse osmosis unit, it relates to a kind of reverse osmosis unit.It comprises seawater original water inlet end, quartzite strainer, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter, product water tank, also comprises the anti-scale inhibition system of protection against corrosion and chemically-cleaning device.Quartz filter, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter filter through row step by step for the former water of seawater, the anti-scale inhibition system of protection against corrosion ensures filter effect, quartz filter filtering accuracy is high, effective removal colloidal particle and macromolecule organic, activated charcoal filter planar water free chlorine, and also have higher clearance to organism and colourity.First step accurate filter and second stage accurate filter do further filtration treatment to the former water of seawater, filter out the less bacterium of volume, microorganism, the impurity such as colloid, make the former water of seawater reach the standard entering RO membrane filtration.

Description

A kind of seawater cleaning reverse osmosis unit

Technical field

The utility model relates to a kind of reverse osmosis unit, especially a kind of seawater cleaning reverse osmosis unit.

Background technology

At present, filter element filtering is widely used in sea water desaltination treating processes, and charging seawater, through pre-treatment, removes suspended solids and other nuisance.Then after high-pressure pump supercharging, utilize the principle of reverse osmosis to apply the pressure larger than naturally osmotic pressure at raw water side, make water molecules by the high side's reverse osmosis of concentration to the low side of concentration, the middle freshwater product of output enters reprocessing facility.Existing seawater filtering device, the former water of seawater is after elementary simple pre-treatment is filtered, just be directly delivered into RO film filter to filter, still the materials such as a large amount of bacteriums, colloid are had in the former water of seawater, the RO film of long-term RO film filter inside in the past can produce the phenomenon such as biological attachment, scale inhibition, have a strong impact on the work-ing life of RO film filter, meanwhile, the quality of filtering rear product water cannot be ensured.

Utility model content

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provides a kind of seawater cleaning reverse osmosis unit.It is by arranging quartz filter, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter for the former water of seawater step by step through row filtration, the anti-scale inhibition system of protection against corrosion is coordinated to ensure filter effect, its filtering accuracy of quartz filter is high, effective removal colloidal particle and macromolecule organic, activated charcoal filter efficient adsorption water free chlorine, adsorptive power reaches 99%, and activated charcoal filter also has higher clearance to organism and colourity.First step accurate filter and second stage accurate filter do further filtration treatment to the former water of seawater, filter out the less bacterium of volume, microorganism, the impurity such as colloid, make the former water of seawater reach the standard entering RO film filter.

For achieving the above object, the utility model adopts following technical proposals:

A kind of seawater cleaning reverse osmosis unit, it comprises seawater original water inlet end, quartz filter, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter, product water tank, described seawater original water inlet end is communicated with quartz filter input terminus by connecting pipeline, described quartz filter output terminal is communicated with activated charcoal filter input terminus by connecting pipeline, described activated charcoal filter output terminal is communicated with first step accurate filter input terminus by connecting pipeline, described first step accurate filter output terminal is communicated with second stage accurate filter input terminus by connecting pipeline, described second stage accurate filter output terminal is communicated with RO film filter input terminus by connecting pipeline, described RO film filter output terminal is communicated with product water tank by connecting pipeline, described reverse osmosis unit also comprises the anti-scale inhibition system of protection against corrosion and chemically-cleaning device.

Preferably, described protection against corrosion anti-scale inhibition system its have and to connect between seawater original water inlet end and quartz filter pipeline for carrying out the iron(ic) chloride device of flocculation reaction for the former water of seawater; To connect between iron(ic) chloride device and quartz filter pipeline for the sterilant device of the sterilization that carries out disinfection for the former water of seawater; Connecting pipeline between activated charcoal filter and first step accurate filter is that the former water of seawater carries out reduction reaction and neutralizes reductive agent device more than oxygenant; And connect between second stage accurate filter and RO film filter pipeline and prevent it from causing the antiscaling device of scale inhibition in advance to RO film filter for the former water of further purification seawater.

Preferably, described iron(ic) chloride device comprises iron(ic) chloride device volume pump, the square dosing tank of iron(ic) chloride device, iron(ic) chloride device first control valve, iron(ic) chloride device second control valve and iron(ic) chloride device the 3rd control valve, the input terminus of described iron(ic) chloride device volume pump is connected with the square dosing tank of iron(ic) chloride device by pipeline, described iron(ic) chloride device first control valve and iron(ic) chloride device second control valve are connected on the connecting pipeline between iron(ic) chloride device volume pump and the square dosing tank of iron(ic) chloride device, described iron(ic) chloride device the 3rd control valve is placed on the pipeline between iron(ic) chloride device volume pump output terminal connection seawater original water inlet end and quartz filter.

Preferably, described sterilant device comprises sterilant device volume pump, the square dosing tank of sterilant device, sterilant device first control valve, sterilant device second control valve and sterilant device the 3rd control valve, the input terminus of described sterilant device volume pump is connected with the square dosing tank of sterilant device by pipeline, described sterilant device first control valve and sterilant device second control valve are connected on the connecting pipeline between sterilant device volume pump and the square dosing tank of sterilant device, described sterilant device the 3rd control valve is placed on the pipeline between sterilant device volume pump output terminal connection iron(ic) chloride device and quartz filter.

Preferably, described reductive agent device comprises reductive agent device volume pump, the square dosing tank of reductive agent device, reductive agent device first control valve, reductive agent device second control valve and reductive agent device the 3rd control valve, the input terminus of described reductive agent device volume pump is connected with the square dosing tank of reductive agent device by pipeline, described reductive agent device first control valve and reductive agent device second control valve are connected on the connecting pipeline between reductive agent device volume pump and the square dosing tank of reductive agent device, described reductive agent device the 3rd control valve is placed on the pipeline between reductive agent device volume pump output terminal connection activated charcoal filter and two-stage precision strainer.

Preferably, described Scale inhibitors device comprises Scale inhibitors device volume pump, the square dosing tank of Scale inhibitors device, Scale inhibitors device first control valve, Scale inhibitors device second control valve and Scale inhibitors device the 3rd control valve, the input terminus of described Scale inhibitors device volume pump is connected with the square dosing tank of Scale inhibitors device by pipeline, described Scale inhibitors device first control valve and Scale inhibitors device second control valve are connected on the connecting pipeline between Scale inhibitors device volume pump and the square dosing tank of Scale inhibitors device, described Scale inhibitors device the 3rd control valve is placed on the pipeline between Scale inhibitors device volume pump output terminal connection second stage accurate filter and RO film filter.

Preferably, described chemically-cleaning device comprises cleaning case, first control valve, flushing water pump, second control valve, cartridge filter, 3rd diverting valve, 4th reversing valve, the output terminal of described cleaning case is communicated with by the inlet end of pipeline with the 3rd diverting valve, a shunting end of described 3rd diverting valve is communicated with first accurate filter that will clean by pipeline, another shunting end of described 3rd diverting valve is communicated with RO film filter with second accurate filter of connecting by pipeline, the described input terminus of the 4th reversing valve is communicated with the dense water output of RO film filter, an output terminal of described 4th reversing valve is by pipeline connection blowoff basin, another output terminal of 4th reversing valve is communicated with the refluxing opening of cleaning case by pipeline.

Preferably, described cleaning case comprises citric acid addition room, citric acid addition room control valve, hydrochloric acid addition room, hydrochloric acid addition room control valve, sodium hydroxide addition room, sodium hydroxide addition room control valve, additional medicaments addition room, additional medicaments addition room control valve and mixing section, described mixing section by connecting pipeline respectively with citric acid addition room, hydrochloric acid addition room, sodium hydroxide addition room, additional medicaments addition room is connected, described citric acid addition room control valve is arranged on the pipeline between citric acid addition room and mixing section, described hydrochloric acid addition room control valve is arranged on the pipeline between hydrochloric acid addition room and mixing section, described sodium hydroxide addition room control valve is arranged on the pipeline between sodium hydroxide addition room and mixing section, described additional medicaments addition room control valve is arranged on the pipeline between additional medicaments addition room and mixing section, described mixing section is provided with water filling port and mixing section top is communicated with refluxing opening, described mixing section lower end is communicated with cleaning case output terminal.

Preferably, described RO film filter its have and to roll on center set water pipe and the filtration module be limited in putamina that described center set water pipe sleeve is loaded on, and be arranged on the closed end cap at putamina two ends; Described filtration module has and is attached at being used as to support RO film and playing the stratum reticulare of guide functions for the seawater that will filter of RO film both sides; The filter pore aperture of described RO film increases gradually, and the filter pore aperture of described RO film is aperture smallest end from rolling in center set water pipe end, the filter pore aperture of described RO film is increased to 50 μm gradually by 5 μm, and the sidewall of described center set water pipe offers seawater inlet port.

The beneficial effects of the utility model are,

1, the utility model is by arranging quartz filter, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter for the former water of seawater step by step through row filtration, the anti-scale inhibition system of protection against corrosion is coordinated to ensure filter effect, its filtering accuracy of quartz filter is high, effective removal colloidal particle and macromolecule organic, activated charcoal filter efficient adsorption water free chlorine, adsorptive power reaches 99%, and activated charcoal filter also has higher clearance to organism and colourity.First step accurate filter and second stage accurate filter do further filtration treatment to the former water of seawater, filter out the less bacterium of volume, microorganism, the impurity such as colloid, make the former water of seawater reach the standard entering RO membrane filtration.

2, the utility model is by arranging the anti-scale inhibition system of protection against corrosion, regulates the former water of seawater, prevents RO film filter from blocking in advance, improve the working efficiency of RO film filter, ensure product water quality, extend the work-ing life of sea water purifier, save maintenance and repair cost.

3, the utility model is by arranging chemically-cleaning device, realizes the routine cleaning to reverse osmosis unit, ensures the filter effect of strainer at different levels, guarantees product water quality.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation;

Fig. 2 is cleaning case inside composition schematic diagram;

Fig. 3 is RO film filter structural representation;

Fig. 4 is filtration module structural representation;

Fig. 5 is filter membrane structural representation;

Wherein 1 seawater original water inlet end, 2 quartz filters, 3 activated charcoal filters, 4-1 first step accurate filter, 4-2 second stage accurate filter, 5 RO film filters, 100 product water tanks, 6 iron(ic) chloride devices, 6-1 iron(ic) chloride device volume pump, the square dosing tank of 6-2 iron(ic) chloride device, 6-3 iron(ic) chloride device first control valve, 6-4 iron(ic) chloride device second control valve, 6-5 iron(ic) chloride device the 3rd control valve, 7 sterilant devices, 7-1 sterilant device volume pump, the square dosing tank of 7-2 sterilant device, 7-3 sterilant device first control valve, 7-4 sterilant device second control valve, 7-5 sterilant device the 3rd control valve, 8 reductive agent devices, 8-1 reductive agent device volume pump, the square dosing tank of 8-2 reductive agent device, 8-3 reductive agent device first control valve, 8-4 reductive agent device second control valve, 8-5 reductive agent device the 3rd control valve, 9 Scale inhibitors devices, 9-1 Scale inhibitors device volume pump, the square dosing tank of 9-2 Scale inhibitors device, 9-3 Scale inhibitors device first control valve, 9-4 Scale inhibitors device second control valve, 9-5 Scale inhibitors device the 3rd control valve, 10 cleaning cases, 20 first control valves, 30 flushing water pumps, 40 second control valves, 50 cartridge filters, 60 the 3rd diverting valves, 70 the 4th reversing valves, 10-1 citric acid addition room, 10-10 citric acid addition room control valve, 10-2 hydrochloric acid addition room, 10-20 hydrochloric acid addition room control valve, 10-3 sodium hydroxide addition room, 10-30 sodium hydroxide addition room control valve, 10-4 additional medicaments addition room, 10-40 additional medicaments addition room control valve, 10-5 mixing section, 5-1 center set water pipe, 5-2 putamina, 5-3 filtration module, 5-3-1RO film, 5-3-2 stratum reticulare, 5-4 closed end cap.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated.

A kind of seawater cleaning reverse osmosis unit, it comprises seawater original water inlet end 1, quartz filter 2, activated charcoal filter 3, first step accurate filter 4-1, second stage accurate filter 4-2, RO film filter 5, product water tank 100, described seawater original water inlet end 1 is communicated with quartz filter 2 input terminus by connecting pipeline, described quartz filter 2 output terminal is communicated with activated charcoal filter 3 input terminus by connecting pipeline, described activated charcoal filter 3 output terminal is communicated with first step accurate filter 4-1 input terminus by connecting pipeline, described first step accurate filter 4-1 output terminal is communicated with second stage accurate filter 4-2 input terminus by connecting pipeline, described second stage accurate filter 4-2 output terminal is communicated with RO film filter 5 input terminus by connecting pipeline, described RO film filter 5 output terminal is communicated with product water tank 100 by connecting pipeline, described reverse osmosis unit also comprises the anti-scale inhibition system of protection against corrosion and chemically-cleaning device.

On technique scheme basis, described protection against corrosion anti-scale inhibition system its have and to connect between seawater original water inlet end 1 and quartz filter 2 pipeline for for the former water of seawater is through the iron(ic) chloride device 6 of row flocculation reaction; To connect and between iron(ic) chloride device 6 and quartz filter 2, pipeline is used for carrying out disinfection the sterilant device 7 of sterilization for the former water of seawater; Connecting pipeline between activated charcoal filter 3 and first step accurate filter 4-1 is that the former water of seawater carries out reduction reaction and neutralizes reductive agent device 8 more than oxygenant; And to connect and between second stage accurate filter 4-2 and RO film filter 5, pipeline is used for the former water of further purification seawater and prevents it from causing the antiscaling device 9 of in advance scale inhibition to RO film filter.

The former aqueous suspension particulate of seawater, macrobead organism is made to produce flocculation by iron(ic) chloride device at seawater original water inlet end, anticipate, for the filter effect playing quartz filter and activated charcoal filter to greatest extent provides safeguard for obtaining in the follow-up quartz filter of seawater raw water filtration and activated charcoal filter fully filtering.By sterilant device, the former water of seawater is carried out disinfection sterilization, ensure that seawater cleaning quality reaches standard for drinking.By the oxidizing substance in the former water of reductive agent device reduction seawater and unnecessary chlorine, eliminate medicament unnecessary in the former water of seawater, the particulate matter in the former water of seawater is eliminated further by Scale inhibitors device, prevent RO film filter from blocking in advance, improve the working efficiency of RO film filter, extend the work-ing life of sea water purifier, save maintenance and repair cost.

On technique scheme basis, described iron(ic) chloride device 6 comprises iron(ic) chloride device volume pump 6-1, the square dosing tank 6-2 of iron(ic) chloride device, iron(ic) chloride device first control valve 6-3, iron(ic) chloride device second control valve 6-4 and iron(ic) chloride device the 3rd control valve 6-5, the input terminus of described iron(ic) chloride device volume pump 6-1 is connected by the square dosing tank 6-2 of pipeline and iron(ic) chloride device, described iron(ic) chloride device first control valve 6-3 and iron(ic) chloride device second control valve 6-4 is connected on the connecting pipeline between iron(ic) chloride device volume pump 6-1 and the square dosing tank 6-2 of iron(ic) chloride device, described iron(ic) chloride device the 3rd control valve 6-5 is placed on the pipeline between iron(ic) chloride device volume pump 6-1 output terminal connection seawater original water inlet end 1 and quartz filter 2.

On technique scheme basis, described sterilant device 7 comprises sterilant device volume pump 7-1, the square dosing tank 7-2 of sterilant device, sterilant device first control valve 7-3, sterilant device second control valve 7-4 and sterilant device the 3rd control valve 7-5, the input terminus of described sterilant device volume pump 7-1 is connected by the square dosing tank 7-2 of pipeline and sterilant device, described sterilant device first control valve 7-3 and sterilant device second control valve 7-4 is connected on the connecting pipeline between sterilant device volume pump 7-1 and the square dosing tank 7-2 of sterilant device, described sterilant device the 3rd control valve 7-5 is placed on the pipeline between sterilant device volume pump 7-1 output terminal connection iron(ic) chloride device 6 and quartz filter 2.

On technique scheme basis, described reductive agent device 8 comprises reductive agent device volume pump 8-1, the square dosing tank 8-2 of reductive agent device, reductive agent device first control valve 8-3, reductive agent device second control valve 8-4 and reductive agent device the 3rd control valve 8-5, the input terminus of described reductive agent device volume pump 8-1 is connected by the square dosing tank 8-2 of pipeline and reductive agent device, described reductive agent device first control valve 8-3 and reductive agent device second control valve 8-4 is connected on the connecting pipeline between reductive agent device volume pump 8-1 and the square dosing tank 8-2 of reductive agent device, described reductive agent device the 3rd control valve 8-5 is placed on the pipeline between reductive agent device volume pump 8-1 output terminal connection activated charcoal filter 3 and two-stage precision strainer 4.

On technique scheme basis, described Scale inhibitors device 9 comprises Scale inhibitors device volume pump 9-1, the square dosing tank 9-2 of Scale inhibitors device, Scale inhibitors device first control valve 9-3, Scale inhibitors device second control valve 9-4 and Scale inhibitors device the 3rd control valve 9-5, the input terminus of described Scale inhibitors device volume pump 9-1 is connected by the square dosing tank 9-2 of pipeline and Scale inhibitors device, described Scale inhibitors device first control valve 9-3 and Scale inhibitors device second control valve 9-4 is connected on the connecting pipeline between Scale inhibitors device volume pump 9-1 and the square dosing tank 9-2 of Scale inhibitors device, described Scale inhibitors device the 3rd control valve 9-5 is placed on the pipeline between Scale inhibitors device volume pump 9-1 output terminal connection second stage accurate filter 4-2 and RO film filter 5.

On technique scheme basis, described chemically-cleaning device comprises cleaning case 10, first control valve 20, flushing water pump 30, second control valve 40, cartridge filter 50, 3rd diverting valve 60, 4th reversing valve 70, the output terminal of described cleaning case 10 is communicated with by the inlet end of pipeline with the 3rd diverting valve 60, a shunting end of described 3rd diverting valve 60 is communicated with the first accurate filter 4-1 that will clean by pipeline, another shunting end of described 3rd diverting valve 60 is communicated with RO film filter 5 with the second accurate filter 4-2 connected by pipeline, the described input terminus of the 4th reversing valve 70 is communicated with the dense water output of RO film filter, an output terminal of described 4th reversing valve 70 is by pipeline connection blowoff basin, another output terminal of 4th reversing valve 70 is communicated with by the refluxing opening of pipeline with cleaning case 10.

By injecting matting medicament in cleaning case, by flushing water pump transport cleaning liquid, scavenging solution is by the 3rd diverting valve shunting inflow first accurate filter, complete and the first accurate filter is cleaned, scavenging solution flows into the second accurate filter and the RO film filter of series connection by the 3rd diverting valve, control will can carry out the cleaning fluid discharge blowoff basin of matting for the first time by the 4th reversing valve, when avoiding first, in equipment, too much scale inhibition thing causes larger pollution to scavenging solution, change the 4th reversing valve to flow to, the follow-up scavenging solution carrying out matting can be made to flow back to cleaning case, recycle is formed to scavenging solution, cut the waste, simultaneously scavenging solution is back to cleaning case and can plays effect to stirring and washing case cleaning liquid inside.

On technique scheme basis, described cleaning case 10 comprises citric acid addition room 10-1, citric acid addition room control valve 10-10, hydrochloric acid addition room 10-2, hydrochloric acid addition room control valve 10-20, sodium hydroxide addition room 10-3, sodium hydroxide addition room control valve 10-30, additional medicaments addition room 10-4, additional medicaments addition room control valve 10-40 and mixing section 10-5, described mixing section 10-5 by connecting pipeline respectively with citric acid addition room 10-1, hydrochloric acid addition room 10-2, sodium hydroxide addition room 10-3, additional medicaments addition room 10-4 is connected, described citric acid addition room control valve 10-10 is arranged on the pipeline between citric acid addition room 10-1 and mixing section 10-5, described hydrochloric acid addition room control valve 10-20 is arranged on the pipeline between hydrochloric acid addition room 10-2 and mixing section 10-5, described sodium hydroxide addition room control valve 10-30 is arranged on the pipeline between sodium hydroxide addition room 10-3 and mixing section 10-5, described additional medicaments addition room control valve 10-40 is arranged on the pipeline between additional medicaments addition room 10-4 and mixing section 10-5, described mixing section 10-5 is provided with water filling port and mixing section 10-5 top is communicated with refluxing opening, described mixing section 10-5 lower end is communicated with cleaning case output terminal.

On technique scheme basis, described RO film filter 5 has and to roll on center set water pipe 5-1 and the filtration module 5-3 be limited in putamina 5-2 that described center set water pipe 5-1 is set in, and is arranged on the closed end cap 5-4 at putamina 5-2 two ends; Described filtration module 5-3 has and is attached at being used as to support RO film 5-3-1 and playing the stratum reticulare 5-3-2 of guide functions for the seawater that will filter of RO film 5-3-1 both sides; The filter pore aperture of described RO film 5-3-1 increases gradually, and the filter pore aperture of described RO film 5-3-1 is aperture smallest end from rolling in center set water pipe 5-1 holds, the filter pore aperture of described RO film 5-3-1 is increased to 50 μm gradually by 5 μm, and the sidewall of described center set water pipe 5-1 offers seawater inlet port.

The filter pore aperture of RO film increases gradually from rolling outer layers in center set water pipe end, roll filter core from the outer to the inner precision increase gradually, particle in the former water of filtering sea is filtered step by step according to volume size, wide aperture part can with enough space macrobeads, guarantee that filter core is unlikely to rapid blocking, provide good shape rigidity simultaneously; Small-bore part can stop fine particle, ensure that filtering accuracy, thus the filter core blocking avoiding precision high is fast, but also reduce filtration resistance, decrease energy consumption, the outer first blocked situation of filter membrane that is folded over avoiding homogeneous aperture occurs, reduce filtration resistance, improve filtration flux.

By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.

Claims

1. a seawater cleaning reverse osmosis unit, it is characterized in that: it comprises seawater original water inlet end, quartzite strainer, activated charcoal filter, first step accurate filter, second stage accurate filter, RO film filter and product water tank, described seawater original water inlet end is communicated with quartzite strainer input terminus by connecting pipeline, described quartzite strainer output terminal is communicated with activated charcoal filter input terminus by connecting pipeline, described activated charcoal filter output terminal is communicated with first step accurate filter input terminus by connecting pipeline, described first step accurate filter output terminal is communicated with second stage accurate filter input terminus by connecting pipeline, described second stage accurate filter output terminal is communicated with RO film filter input terminus by connecting pipeline, described RO film filter output terminal is communicated with product water tank by connecting pipeline, described reverse osmosis unit also comprises the anti-scale inhibition system of protection against corrosion and chemically-cleaning device.

2. a kind of seawater cleaning reverse osmosis unit as claimed in claim 1, is characterized in that: described protection against corrosion anti-scale inhibition system its have and to connect between seawater original water inlet end and quartz filter pipeline for for the former water of seawater is through the iron(ic) chloride device of row flocculation reaction; To connect and between iron(ic) chloride device and quartz filter, pipeline is used for carrying out disinfection the sterilant device of sterilization for the former water of seawater; Connecting pipeline between activated charcoal filter and two-stage precision strainer is that the former water of seawater carries out reduction reaction and neutralizes reductive agent device more than oxygenant; And to connect and between two-stage precision strainer and RO film filter, pipeline is used for the former water of further purification seawater and prevents it from causing the antiscaling device of in advance scale inhibition to RO film filter.

3. a kind of seawater cleaning reverse osmosis unit as claimed in claim 2, it is characterized in that: described iron(ic) chloride device comprises iron(ic) chloride device volume pump, the square dosing tank of iron(ic) chloride device, iron(ic) chloride device first control valve, iron(ic) chloride device second control valve and iron(ic) chloride device the 3rd control valve, the input terminus of described iron(ic) chloride device volume pump is connected with the square dosing tank of iron(ic) chloride device by pipeline, described iron(ic) chloride device first control valve and iron(ic) chloride device second control valve are connected on the connecting pipeline between iron(ic) chloride device volume pump and the square dosing tank of iron(ic) chloride device, described iron(ic) chloride device the 3rd control valve is placed on the pipeline between iron(ic) chloride device volume pump output terminal connection seawater original water inlet end and quartz filter.

4. a kind of seawater cleaning reverse osmosis unit as claimed in claim 3, it is characterized in that: described sterilant device comprises sterilant device volume pump, the square dosing tank of sterilant device, sterilant device first control valve, sterilant device second control valve and sterilant device the 3rd control valve, the input terminus of described sterilant device volume pump is connected with the square dosing tank of sterilant device by pipeline, described sterilant device first control valve and sterilant device second control valve are connected on the connecting pipeline between sterilant device volume pump and the square dosing tank of sterilant device, described sterilant device the 3rd control valve is placed on the pipeline between sterilant device volume pump output terminal connection iron(ic) chloride device and quartz filter.

5. a kind of seawater cleaning reverse osmosis unit as claimed in claim 4, it is characterized in that: described reductive agent device comprises reductive agent device volume pump, the square dosing tank of reductive agent device, reductive agent device first control valve, reductive agent device second control valve and reductive agent device the 3rd control valve, the input terminus of described reductive agent device volume pump is connected with the square dosing tank of reductive agent device by pipeline, described reductive agent device first control valve and reductive agent device second control valve are connected on the connecting pipeline between reductive agent device volume pump and the square dosing tank of reductive agent device, described reductive agent device the 3rd control valve is placed on the pipeline between reductive agent device volume pump output terminal connection activated charcoal filter and two-stage precision strainer.

6. a kind of seawater cleaning reverse osmosis unit as claimed in claim 5, it is characterized in that: described Scale inhibitors device comprises Scale inhibitors device volume pump, the square dosing tank of Scale inhibitors device, Scale inhibitors device first control valve, Scale inhibitors device second control valve and Scale inhibitors device the 3rd control valve, the input terminus of described Scale inhibitors device volume pump is connected with the square dosing tank of Scale inhibitors device by pipeline, described Scale inhibitors device first control valve and Scale inhibitors device second control valve are connected on the connecting pipeline between Scale inhibitors device volume pump and the square dosing tank of Scale inhibitors device, described Scale inhibitors device the 3rd control valve is placed on the pipeline between Scale inhibitors device volume pump output terminal connection second stage accurate filter and RO film filter.

7. a kind of seawater cleaning reverse osmosis unit as described in claim 1 or 2 or 6, it is characterized in that: described chemically-cleaning device comprises cleaning case, first control valve, flushing water pump, second control valve, cartridge filter, 3rd diverting valve and the 4th reversing valve, the output terminal of described cleaning case is communicated with by the inlet end of pipeline with the 3rd diverting valve, a shunting end of described 3rd diverting valve is communicated with first accurate filter that will clean by pipeline, another shunting end of described 3rd diverting valve is communicated with RO film filter with second accurate filter of connecting by pipeline, the described input terminus of the 4th reversing valve is communicated with the dense water output of RO film filter, an output terminal of described 4th reversing valve is by pipeline connection blowoff basin, another output terminal of 4th reversing valve is communicated with the refluxing opening of cleaning case by pipeline.

8. a kind of seawater cleaning reverse osmosis unit as claimed in claim 7, it is characterized in that: described cleaning case comprises citric acid addition room, citric acid addition room control valve, hydrochloric acid addition room, hydrochloric acid addition room control valve, sodium hydroxide addition room, sodium hydroxide addition room control valve, additional medicaments addition room, additional medicaments addition room control valve and mixing section, described mixing section by connecting pipeline respectively with citric acid addition room, hydrochloric acid addition room, sodium hydroxide addition room, additional medicaments addition room is connected, described citric acid addition room control valve is arranged on the pipeline between citric acid addition room and mixing section, described hydrochloric acid addition room control valve is arranged on the pipeline between hydrochloric acid addition room and mixing section, described sodium hydroxide addition room control valve is arranged on the pipeline between sodium hydroxide addition room and mixing section, described additional medicaments addition room control valve is arranged on the pipeline between additional medicaments addition room and mixing section, described mixing section is provided with water filling port and mixing section top is communicated with refluxing opening, described mixing section lower end is communicated with cleaning case output terminal.

9. a kind of seawater cleaning reverse osmosis unit as claimed in claim 8, it is characterized in that: described RO film filter has and to roll on center set water pipe and the filtration module be limited in putamina that described center set water pipe sleeve is loaded on, and is arranged on the closed end cap at putamina two ends; Described filtration module has and is attached at being used as to support RO film and playing the stratum reticulare of guide functions for the seawater that will filter of RO film both sides; The filter pore aperture of described RO film increases gradually, and the filter pore aperture of described RO film is aperture smallest end from rolling in center set water pipe end, the filter pore aperture of described RO film is increased to 50 μm gradually by 5 μm, and the sidewall of described center set water pipe offers seawater inlet port.