CN110743403A - Method and device for optimizing reverse osmosis seawater desalination water quality of ship - Google Patents
Method and device for optimizing reverse osmosis seawater desalination water quality of ship Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/405—Methods of mixing liquids with liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/48—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids
- B01F23/483—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids using water for diluting a liquid ingredient, obtaining a predetermined concentration or making an aqueous solution of a concentrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/49—Mixing systems, i.e. flow charts or diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/708—Filtering materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2202—Controlling the mixing process by feed-back, i.e. a measured parameter of the mixture is measured, compared with the set-value and the feed values are corrected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J1/00—Arrangements of installations for producing fresh water, e.g. by evaporation and condensation of sea water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
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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
Abstract
The invention discloses a method and a device for optimizing reverse osmosis seawater desalination water quality of ships. Firstly, setting the flow ratio of tap water to desalted water according to the content of boron in seawater desalted effluent, and setting standard parameters of total hardness, total alkalinity and pH value of mixed water in a controller; secondly, feeding back three index values of total hardness, total alkalinity and pH value detected by the tap water and desalted water quality instrument to the controller, and calculating the target values of total hardness, total alkalinity and pH value required to be reached by the mineralization of the desalted water by the controller; the controller starts the desalted water delivery pump, the desalted water is introduced into the mineralization device to be mineralized, the mineralized water is detected on line and fed back to the controller, when the detected value meets the target value, the controller starts the tap water delivery pump and the mineralized water delivery pump, and the mineralized desalted water and the tap water are delivered to the mixed water tank in proportion according to the set flow ratio of the tap water to the desalted water. The invention can effectively increase the water consumption of the ship, improve and stabilize the water quality, reduce the consumption of mineralizers and ensure the health of personnel and the safety of equipment.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to a method and a device for optimizing reverse osmosis seawater desalination water quality of a ship.
Background
With the increase of the long-range voyage mission of the ship, the construction requirement of the marine endurance of the ship is increasingly outstanding. In order to ensure daily fresh water of equipment and personnel, the reverse osmosis seawater desalination device is widely applied to ships except for supplying municipal tap water on the shore. At present, main chemical indexes and toxicological indexes of reverse osmosis seawater desalinated water of a ship basically accord with GB 5749-:
firstly, the reverse osmosis membrane has low boron removal rate, and potential hidden dangers can be caused to human health by drinking the produced water of the reverse osmosis process for a long time;
secondly, the reverse osmosis seawater desalination water has low hardness and alkalinity, and is lack of mineral elements such as calcium, magnesium and the like which are beneficial to human bodies;
thirdly, when the desalted water is used for bathing and washing, the desalted water is difficult to rinse clean, the skin can generate greasy feeling, and the taste is not good when the desalted water is drunk;
fourthly, the desalted water is acidic and contains chloride ions, and pitting corrosion is easily caused to equipment such as a water pipeline, a heater and the like.
Meanwhile, the water quality of the tap water supplied by the ship is unstable due to different regional sources, large water quality difference and different hardness degrees.
The problems of the water quality of the reverse osmosis seawater desalination water of the ship and the difference of the quality of the supplied tap water make the stability of the fresh water supply of the ship poor, and influence on the safety of ship equipment and the health of personnel to a certain extent. For the problems, the common treatment method is to mineralize the desalted water by using a liquid addition method or a solid filtration method, but the methods have the defects that a mineralization device occupies a large space, the consumption of a mineralizer is large, and index control is not easy to give consideration to, so that the investment and operation costs are increased; in particular, for the first problem, there is currently no efficient, low cost method for reducing the boron content.
Chinese patent CN 104192975B discloses a method for modifying seawater by reverse osmosis of ships by adding modifying agents (calcium chloride, magnesium sulfate and sodium bicarbonate) into a pipeline mixer, but it has the problems of large dosage of modifying agents and inconvenient storage; a similar method is disclosed in the chinese patent application with publication No. CN 102603034 a (a tempering method and device for seawater desalination produced water), and the problems of complicated dosing device and large consumption of tempering agent also exist. In addition, the methods related to the two comparison documents do not consider the removal of boron, and the adopted device for mixing the desalted water and the modifying agent is a pipeline mixer, so that the defects of unstable and uniform mixing exist.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an optimization method for reverse osmosis seawater desalination water quality of a ship, so as to solve the problems of excessive boron element, lack of nutrient elements such as calcium and magnesium, and insufficient quantity of conditioner in mineralization link of the existing seawater desalination water of the ship, complex conditioning process, unstable water production, and the like, avoid pitting corrosion on ship pipelines and equipment, improve and stabilize tap water quality, provide healthy water with stable water quality for sailors, and effectively improve seawater desalination water quality of the ship and safe water supply capacity.
The invention also aims to provide an optimization device for reverse osmosis seawater desalination of ships.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for optimizing reverse osmosis seawater desalination water quality of a ship comprises the following steps:
1) setting the flow ratio of tap water and desalted water according to the measured boron content in the seawater desalted effluent, so that the boron content in the mixed water of the tap water and the desalted water is lower than the limit value of GB 5749-;
2) setting standard value ranges of the total hardness, the total alkalinity and the pH value of the mixed water in the step 1);
3) respectively obtaining three water quality index values of total hardness, total alkalinity and pH value of tap water and desalted water by a water quality online monitor, and determining the total hardness, total alkalinity and pH value required by the mineralization of the desalted water according to the standard value range in the step 2);
4) introducing the desalted water into a mineralization device for mineralization according to the flow of the desalted water determined in the step 1), so that the effluent quality index meets the requirements of the total hardness, the total alkalinity and the pH value of the desalted water after mineralization in the step 3);
5) pumping tap water out of the water tank according to the flow determined in the step 1), and mixing the tap water with the desalted water mineralized in the step 4) to obtain mixed water with the water quality meeting the standard requirement of the step 2) for users to use.
The limit value of the boron content in the step 1) is 0.5 mg/L.
The standard value ranges of the total hardness, the total alkalinity and the pH value of the mixed water in the step 2) are respectively that the pH is more than or equal to 7.0 and less than or equal to 8.5, the total hardness is more than or equal to 80 mg/L and less than or equal to 120 mg/L, and the total alkalinity is more than or equal to 60 mg/L.
And step 5) after the tap water is pumped out of the water tank, the tap water enters an ultrafiltration system to remove particulate matters such as silt, rust, bacteria and the like.
An optimization device for reverse osmosis seawater desalination of a ship, comprising: the system comprises a seawater desalination tank, a tap water tank, a desalination water delivery pump, a mineralization device, a tap water delivery pump, a mixed water tank and a water quality detection control system, wherein the desalination water delivery pump delivers desalination water to the mineralization device, and the mineralization desalination water is delivered to the mixed water tank; the tap water delivery pump delivers tap water to the mixed water tank, and mineralized desalinated water and tap water are mixed in the mixed water tank and delivered to users.
The mineralization device comprises a sealed tank body, a mineralizer loaded in the tank body, a circulating water pump and a matched pipeline, wherein the circulating water pump is connected with the tank body through the matched pipeline, the circulating water pump carries out circulating reflux on the desalinated water filled in the tank, and the total hardness, the total alkalinity and the pH value of the mineralized desalinated water are controlled through the release amount of the mineralizer.
The mineralizer contains active ingredients such as calcium, magnesium and the like which can be controllably released.
The water quality detection control system comprises a controller, a pH detector, a total alkalinity detector and a total hardness detector, wherein the pH detector, the total alkalinity detector and the total hardness detector are respectively arranged in a desalination water tank, a tap water tank, a mineralization device and a mixed water tank in a set, each detector is connected with the controller, the controller is connected with each water pump, corresponding water quality detection data are collected and calculated by the controller, and then the corresponding water pumps are controlled, so that the pH, the total alkalinity and the total hardness indexes of the outlet water of the mineralization device meet the requirements of mixed water.
The invention also comprises a filter used for removing the particulate matters such as silt, rust and bacteria of tap water between the tap water cabin and the mixing water tank, wherein the tap water is filtered by the filter and then mixed with the desalted water mineralized by the mineralization device in the mixing water tank according to a certain mixing proportion.
The filter is an ultrafiltration device.
The invention has the following advantages:
1) the mixing of tap water and seawater desalination water can effectively reduce the boron content in seawater desalination, ensure the health of personnel and reduce the equipment investment and the operation cost;
2) substances contained in tap water are fully utilized, the pH value, the total hardness and the total alkalinity of the seawater desalted water are adjusted, the occupied space of a mineralizing device and the using amount of a mineralizing agent are saved, and the using time of the mineralizing agent is prolonged;
3) the quality of the seawater desalinated water is optimized, and the safety of ship pipelines and equipment is improved;
4) the water quality variation difference of the supplied tap water in different shore areas is solved, and the tap water quality is improved and stabilized.
In conclusion, the method and the device can effectively increase the water volume of the ship water, improve and stabilize the water quality of the water, reduce the usage amount of the mineralizer, and ensure the health of personnel and the safety of equipment.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a schematic structural view of an apparatus according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of an apparatus according to embodiment 2 of the present invention.
Fig. 4 is a schematic structural view of an apparatus according to embodiment 3 of the present invention.
Detailed Description
The invention will be further illustrated by means of specific embodiments, but the invention is not limited to the specific embodiments, which are shown in the drawings.
Example 1:
as shown in fig. 2, the device for optimizing reverse osmosis seawater desalination water quality of a ship comprises: a seawater desalination tank, a tap water tank, a desalination water delivery pump, a mineralization device, a tap water delivery pump, a filter, a mixed water tank and a water quality detection control system; the water quality detection control system comprises a controller, a pH detector, an alkalinity detector and a hardness detector.
The desalted water is conveyed to the mineralization device by the desalted water conveying pump, the mineralizer in the mineralization device contains soluble effective components such as calcium, magnesium and the like, and the mineralized desalted water is conveyed to the mixed water tank; tap water is pumped out of the water tank, enters the filter to remove particulate matters such as silt, rust and bacteria, enters the mixing water tank, is mixed with mineralized desalted water, and is conveyed to a user.
The operation process of the invention is as follows: firstly, setting the flow ratio of tap water to desalted water according to the content of boron in seawater desalted effluent, and manually setting standard parameters of total hardness, total alkalinity and pH value of mixed water in a controller; secondly, feeding back three index values of total hardness, total alkalinity and pH value detected by the tap water and desalted water quality instrument to the controller, and calculating the target values of total hardness, total alkalinity and pH value required to be reached by the mineralization of the desalted water by the controller; the controller starts the desalted water delivery pump, the desalted water is introduced into the mineralization device, after the set water amount of the mineralization device is reached, the desalted water delivery pump is closed, the desalted water is enabled to stand still in the mineralization device, the mineralizer is enabled to be in contact with the mineralization device for dissolution, meanwhile, the total hardness, the total alkalinity and the pH value of the water in the mineralization device are detected on line, the detected values are fed back to the controller, when the detected values meet the target values, the controller starts the water tap water delivery pump and the mineralized water delivery pump, and the mineralized desalted water and the tap water are delivered to the mixed water tank in proportion according to the set flow ratio of the tap water to the.
Example 2:
as shown in fig. 3, the device for optimizing reverse osmosis seawater desalination water quality of a ship comprises: a seawater desalination tank, a tap water tank, a desalination water delivery pump, a mineralization device, a tap water delivery pump, a filter, a mixed water tank and a water quality detection control system; the water quality detection control system comprises a controller, a pH detector, an alkalinity detector and a hardness detector.
The desalted water is conveyed to the mineralization device by the desalted water conveying pump, the mineralizer in the mineralization device contains active ingredients such as calcium, magnesium and the like which can be controllably released, and the mineralized desalted water is conveyed to the mixed water tank; tap water is pumped out of the water tank, enters the filter to remove particulate matters such as silt, rust and bacteria, enters the mixing water tank, is mixed with mineralized desalted water, and is conveyed to a user.
The operation process of the invention is as follows: firstly, setting the flow ratio of tap water to desalted water according to the content of boron in seawater desalted effluent, and manually setting standard parameters of total hardness, total alkalinity and pH value of mixed water in a controller; secondly, feeding back three index values of total hardness, total alkalinity and pH value detected by the tap water and desalted water quality instrument to the controller, and calculating the target values of total hardness, total alkalinity and pH value required to be reached by the mineralization of the desalted water by the controller; the controller starts the desalted water and water delivery pump, the desalted water is introduced into the mineralization device, and the desalted water and water delivery pump is closed after the set water quantity of the mineralization device is reached; then starting a mineralization circulating pump, controlling the release amount of a mineralizer by using the number of hydraulic circulation and time, simultaneously carrying out online detection on the total hardness, the total alkalinity and the pH value of water in the mineralization device, feeding a detection value back to a controller, and stopping the mineralization circulating pump by the controller when the detection value meets a target value; and according to the set flow ratio of the tap water to the desalted water, the controller respectively controls the flow of the tap water delivery pump and the mineralized water delivery pump, and the mineralized desalted water and the tap water are delivered to the mixed water tank in proportion.
Example 3:
as shown in fig. 4, the device for optimizing reverse osmosis seawater desalination water quality of a ship comprises: a seawater desalination tank, a tap water tank, a desalination water delivery pump, a mineralization device, a tap water delivery pump, a filter and a water quality detection control system; the water quality detection control system comprises a controller, a pH detector, an alkalinity detector and a hardness detector.
The desalted water is conveyed to the mineralization device by the desalted water conveying pump, the mineralizer in the mineralization device contains active ingredients such as calcium, magnesium and the like which can be controllably released, and the mineralized desalted water is placed in the mineralization device to wait for being mixed with tap water; tap water is pumped out of the water tank, enters the filter to remove particulate matters such as silt, rust and bacteria, enters the mineralization device, is mixed with the mineralized desalinated water, and is conveyed to a user.
The operation process of the invention is as follows: firstly, setting the flow ratio of tap water to desalted water according to the content of boron in seawater desalted effluent, and manually setting standard parameters of total hardness, total alkalinity and pH value of mixed water in a controller; secondly, feeding back three index values of total hardness, total alkalinity and pH value detected by the tap water and desalted water quality instrument to the controller, and calculating the target values of total hardness, total alkalinity and pH value required to be reached by the mineralization of the desalted water by the controller; the controller starts the desalted water and water delivery pump, the desalted water is introduced into the mineralization device, and the desalted water and water delivery pump is closed after the set water quantity of the mineralization device is reached; then starting a mineralization circulating pump, controlling the release amount of a mineralizer by using the number of hydraulic circulation and time, simultaneously carrying out online detection on the total hardness, the total alkalinity and the pH value of water in the mineralization device, feeding a detection value back to a controller, and stopping the mineralization circulating pump by the controller when the detection value meets a target value; and according to the set flow ratio of the tap water to the desalted water, the controller controls the flow of the tap water delivery pump, the tap water is delivered to the mineralization device, and the tap water and the mineralized desalted water are mixed and delivered to a user.
Example of effects:
taking the water quality indexes of seawater desalination effluent and tap water make-up water of a certain ship as an example, the boron content of the seawater desalination effluent is 0.72mg/L, the boron content of the tap water make-up water is 0.00mg/L, and the mixing ratio of the seawater desalination effluent and the tap water is determined to be 1: 2, the content of boron after mixing is 0.48mg/L, which is lower than the limit value of the water quality standard of drinking water. Through the optimization process, other water quality indexes of the mixed water are obtained as follows:
TABLE 1 Water quality index at different treatment stages
It should be noted that the present invention is not limited to the above-described embodiments. For a person skilled in the art, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An optimization method for reverse osmosis seawater desalination water quality of ships is characterized by comprising the following steps:
1) setting the flow ratio of tap water and desalted water according to the measured boron content in the seawater desalted effluent, so that the boron content in the mixed water of the tap water and the desalted water is lower than the limit value of GB 5749-;
2) setting standard value ranges of the total hardness, the total alkalinity and the pH value of the mixed water in the step 1);
3) respectively obtaining three water quality index values of total hardness, total alkalinity and pH value of tap water and desalted water by a water quality online monitor, and determining the total hardness, total alkalinity and pH value required by the mineralization of the desalted water according to the standard value range in the step 2);
4) introducing the desalted water into a mineralization device for mineralization according to the flow of the desalted water determined in the step 1), so that the effluent quality index meets the requirements of the total hardness, the total alkalinity and the pH value of the desalted water after mineralization in the step 3);
5) pumping tap water out of the water tank according to the flow determined in the step 1), and mixing the tap water with the desalted water mineralized in the step 4) to obtain mixed water with the water quality meeting the standard requirement of the step 2) for users to use.
2. The optimization method for the water quality of the reverse osmosis seawater desalination of the ship according to claim 1, wherein the limit value of the boron content in the step 1) is 0.5 mg/L.
3. The optimization method for the water quality of the reverse osmosis seawater desalination of the ship according to claim 1, characterized in that the standard value ranges of the total hardness, the total alkalinity and the pH value of the mixed water in the step 2) are respectively 7.0-8.5, 80 mg/L-120 mg/L and 60 mg/L-60 mg/L.
4. The optimization method for the water quality of the reverse osmosis seawater desalination of the ship according to claim 1, wherein the step of pumping the tap water from the water tank in the step 5) further comprises the step of removing particulate matters such as silt, rust and bacteria in an ultrafiltration system.
5. An optimization device for reverse osmosis seawater desalination of ships is characterized by comprising: the system comprises a desalted water conveying pump, a mineralization device, a tap water conveying pump, a mixed water tank and a water quality detection control system, wherein the desalted water conveying pump conveys desalted water to the mineralization device, and the mineralized desalted water is conveyed to the mixed water tank; the tap water delivery pump delivers tap water to the mixed water tank, and mineralized desalinated water and tap water are mixed in the mixed water tank and delivered to users.
6. The optimization device for the quality of the desalinated water by the ship reverse osmosis seawater according to claim 5, wherein the mineralization device comprises a sealed tank body, a mineralizer loaded in the tank body, a circulating water pump and a matched pipeline, the circulating water pump is connected with the tank body through the matched pipeline, the circulating water pump carries out circulating reflux on the desalinated water filled in the tank, and the total hardness, the total alkalinity and the pH value of the mineralized desalinated water are controlled through the release amount of the mineralizer.
7. The optimization device for the water quality of the reverse osmosis seawater desalination of the ship of claim 6, wherein the mineralizer contains active ingredients such as calcium, magnesium and the like which can be controllably released.
8. The optimization device for the water quality of the ship reverse osmosis seawater desalination according to claim 5, wherein the water quality detection control system comprises a controller, a pH detector, a total alkalinity detector and a total hardness detector, the pH detector, the total alkalinity detector and the total hardness detector are respectively arranged in a desalination water tank, a tap water tank, a mineralization device and a mixed water tank in a set, each detector is connected with the controller, the controller is connected with each water pump, corresponding water quality detection data are collected and calculated by the controller, and then the corresponding water pumps are controlled, so that the pH, the total alkalinity and the total hardness indexes of the water discharged from the mineralization device meet the mixed water requirement.
9. The optimization device for the water quality of the reverse osmosis seawater desalination of the ship according to claim 5, characterized in that a filter for removing particulate matters such as silt, rust and bacteria of tap water is further arranged between the tap water tank and the mixing water tank, and the tap water is filtered by the filter and then mixed with the desalinated water mineralized by the mineralizing device in the mixing water tank according to a certain mixing proportion.
10. The optimization device for the water quality of the reverse osmosis seawater desalination of the ship of claim 9, wherein the filter is an ultrafiltration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911072817.9A CN110743403A (en) | 2019-11-05 | 2019-11-05 | Method and device for optimizing reverse osmosis seawater desalination water quality of ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911072817.9A CN110743403A (en) | 2019-11-05 | 2019-11-05 | Method and device for optimizing reverse osmosis seawater desalination water quality of ship |
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| CN111320249A (en) * | 2020-03-04 | 2020-06-23 | 辽宁莱特莱德环境工程有限公司 | Seawater desalination mineralization steam-water mixing device |
| TWI778630B (en) * | 2020-05-20 | 2022-09-21 | 萊福美特股份有限公司 | Control system for drinking water treatment system and drinking water treatment system |
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