CN112194300A - Integral type sea water purifier - Google Patents
Integral type sea water purifier Download PDFInfo
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- CN112194300A CN112194300A CN202010981561.XA CN202010981561A CN112194300A CN 112194300 A CN112194300 A CN 112194300A CN 202010981561 A CN202010981561 A CN 202010981561A CN 112194300 A CN112194300 A CN 112194300A
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an integrated seawater purification device which comprises a power supply part, a control part, a purification part, a detection part and a storage part, wherein the power supply part supplies power to the control part and the detection part, the purification part desalts input seawater, the detection part detects unpurified seawater, purified fresh water and purified waste liquid in the purification part and feeds the unpurified seawater, purified fresh water and purified waste liquid back to the control part, and the storage part respectively stores the unpurified seawater, purified fresh water and purified waste liquid. The invention uses the air gap type module group device, the efficiency of transporting steam and condensing is improved by the mutual matching of different module group devices, and the air gap device provides an operating environment for the device needing to be started, thereby improving the effective utilization rate of the purification device and the harmony of the whole device.
Description
Technical Field
The invention belongs to the field of seawater desalination, and particularly relates to an integrated seawater purification device.
Background
The current seawater desalination technology is still in the starting stage, China has a large demand for water resources, and in recent years, a great deal of energy is put into the seawater desalination research, and the seawater desalination technology in China mainly adopts a reverse dialysis technology in membrane desalination, and accounts for about 65% of market share.
The membrane distillation method has the advantages of pure distillate, normal-pressure operation, simple equipment and low requirement on an external heat source, but for the membrane distillation seawater desalination technology, the applied hydrophobic porous membrane is an important factor for limiting large-scale commercial application of the membrane distillation seawater desalination technology, and in order to improve the hydrophobic property of the membrane, relevant treatment needs to be carried out in the selection and preparation processes of the membrane material, so that the membrane preparation cost is increased, and the maintenance process is very difficult.
The prior art has the following disadvantages: at present, a seawater desalination system is still in a starting stage, production and purification are difficult in fresh water-deficient areas which need multiple purposes and low cost or need large-scale application, and currently, seawater desalination equipment used in the world is simple, most of seawater desalination systems depend on large-scale thermal power plants, and the seawater desalination system which is high in practicability, low in energy consumption and high in efficiency and integrated is not available. We have therefore made a corresponding improvement.
Disclosure of Invention
In view of the above technical problems, the present invention provides a complete integrated device (integrating energy supply, distillation, condensation, purification, and cleaning) for providing a mature water purification technical solution with better system compatibility and higher durability for seawater purification or other related water purification aspects, aiming at the defects of the prior art.
The following technical scheme is adopted specifically:
the seawater desalination device comprises a power supply part, a control part, a purification part, a detection part and a storage part, wherein the power supply part supplies power to the control part and the detection part, the purification part desalts input seawater, the detection part detects unpurified seawater, purified fresh water and purified waste liquid in the purification part and feeds the unpurified seawater, purified fresh water and purified waste liquid back to the control part, and the storage part respectively stores the unpurified seawater, purified fresh water and purified waste liquid;
the purification part comprises three layers of purification membrane plates, a heater, a heat insulation plate, a shell, a condensation plate, a metal partition plate, a cold water runner plate, a feeding pipeline, a fresh water pipe and a waste liquid pipe; the heater is arranged at the top; the three layers of purification membrane plates, the heat insulation plate, the condensation plate, the metal partition plate and the cold water flow channel plate are all arranged in the shell; the three-layer purification membrane plate consists of an electrospinning nanofiber layer, a microporous layer and a back lining layer which are sequentially arranged;
the control part comprises three electromagnetic valves which are respectively used for outputting unpurified seawater, purified fresh water and purified waste liquid through a feeding pipeline, a fresh water pipe and a waste liquid pipe;
the detection part comprises three flowmeters which are respectively used for monitoring the flow data of the unpurified seawater, the purified waste liquid and the purified fresh water;
the storage part comprises a seawater tank, a fresh water tank and a waste liquid tank, and is used for respectively storing unpurified seawater, purified fresh water and purified waste liquid;
the device comprises a seawater tank, a feed pipeline, a cold water flow channel plate, a heater, a heating part, a water tank, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the three layers of purification membrane plates and the heater form an;
the method is characterized in that unpurified seawater enters a seawater flow channel from a feeding pipeline, a cold water flow channel plate is arranged beside the seawater flow channel, a fresh water flow channel is arranged between the cold water flow channel plate and the three layers of purification membrane plates, a waste liquid flow channel is arranged on the other side of the three layers of purification membrane plates, the unpurified seawater flows in the three layers of purification membrane plates, water vapor in the air on the surfaces of the cold water flow channel plate and the condensation plate is in a saturated state, the temperature of the three layers of purification membrane plates is higher than that of the condensation flow channel plate, the concentration of the water vapor in the air on the surfaces of the electrospun nanofiber layers is higher than that of the condensation plate, the partial pressure of the water vapor on the three layers of purification membrane plates is larger than that on the condensation plate, and the partial pressure of the water vapor is evaporated and diffused from the sides of the electrospun nanofiber layers of.
Preferably, the device further comprises a cleaning part for removing scale and residue from the storage part.
Preferably, the cleaning part comprises a pH detector arranged in the waste liquid tank and a cleaning opening arranged on the seawater tank, the pH detector is used for measuring the pH value of liquid in the waste liquid tank, and the corrosion inhibitor and the pickling solution are injected into the seawater tank through the cleaning opening.
Preferably, the corrosion inhibitor includes an organic phosphine, a copolymer, and a copper corrosion inhibitor.
Preferably, the power supply unit includes a wind power generation device, a battery, a solar power generation device, and a voltage converter, wherein the wind power generation device and the solar power generation device charge the battery, and the voltage converter converts the voltage of the battery and supplies the converted voltage to the control unit and the detection unit.
Preferably, the electrospun nanofiber layer has a contact angle of 140 ° to 160 °.
Preferably, the pore size of the electrospun nanofiber layer is between 0.05 μm and 5.0 μm.
Preferably, the electrospun nanofiber layer is prepared from titanium dioxide.
Preferably, the microporous layer comprises a polyvinyl acetal foam material.
Preferably, the solenoid valve is switched by a relay control.
The invention has the following beneficial effects:
1. the design scheme of the system integrating energy supply, distillation, condensation, purification, collection, storage, transportation and cleaning control is provided;
2. the invention uses the air gap type module group device, and the efficiency of transporting steam and condensing can be improved by the mutual matching of different module group devices. The air gap device provides an operating environment for the device needing to be started, and the effective utilization rate of the purification device and the harmony of the whole device are improved;
3. the wind-solar integrated energy supply device is arranged by using wind-solar integrated energy supply, and compared with a simple thermal distillation method, the air gap type module has extremely low heat source requirement, the operating temperature is lower than the boiling point by utilizing dew point evaporation, the energy consumption in the operation process can be reduced, and the heat can be provided by clean energy sources such as solar energy, geothermal energy or wind energy;
4. the invention designs a three-layer purification membrane plate structure, the outer surface of an electrospinning nanofiber layer is adjacent to feed seawater, the outer surface of a back lining layer is the distillate side facing a condensation plate, and a microporous layer 403 is used as a filter for removing pollutants in vapor;
5. electromagnetic valves and a water flow meter are arranged for control and detection, and the three electromagnetic valves are respectively used for controlling and conveying unpurified seawater, purified fresh water and purified waste liquid; the three flow meters are respectively used for monitoring data of unpurified seawater, purified waste liquid and purified fresh water;
6. a cleaning part is arranged to remove waste substances such as water scales and the like of the water purification system by adopting an acid washing mode, a corrosion inhibitor is injected into a cleaning port reserved on the seawater tank, and the interior of the seawater desalination device is kept in cold state circulation in the system; opening a cleaning port to slowly inject the pickling solution after the pickling solution is prepared; measuring the pH value of liquid in the waste liquid tank, stopping adding acid to keep the system circulating when the pH value meets the requirement, monitoring the pH acidity in real time to record, opening an electromagnetic valve after cleaning, conveying the waste water to the waste liquid tank, and injecting fresh seawater into the seawater tank; and (4) checking whether the liquid is acidic or not from a pH detector of the waste liquid tank, and draining all effluent liquid until the pH value of the effluent liquid is the same as that of the original seawater.
Drawings
FIG. 1 is a block diagram of an integrated seawater purification apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the purification principle of the integrated seawater purification device according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of an integrated seawater purification apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a purifying part of the integrated seawater purifying apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a three-layer purification membrane plate of the integrated seawater purification device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a DC power circuit of the integrated seawater purification device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a single chip microcomputer circuit in a control part of the integrated seawater purification device according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a solenoid valve driving circuit of the integrated seawater purification device according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating an energy supply flow of the power supply unit of the integrated seawater purification apparatus according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a seawater transportation and purification process of the integrated seawater purification apparatus according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating a cleaning process of the cleaning portion of the integrated seawater cleaning apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the invention discloses an integrated seawater purification device.
Referring to fig. 1, the seawater desalination device comprises a power supply unit 10, a control unit 20, a purification unit 30, a detection unit 40 and a storage unit 50, wherein the power supply unit 10 supplies power to the control unit 20 and the detection unit 40, the purification unit 30 desalts input seawater, the detection unit 40 detects unpurified seawater, purified fresh water and purified waste liquid in the purification unit 30 and feeds the detected seawater, purified fresh water and purified waste liquid back to the control unit 20, and the storage unit 50 stores the unpurified seawater, purified fresh water and purified waste liquid respectively;
the purification part 30 comprises three layers of purification membrane plates 1, a heater 3, a heat insulation plate 303, a shell 306, a condensation plate 4, a metal partition plate 302, a cold water flow channel plate 2, a feeding pipeline 5, a fresh water pipe 304 and a waste water pipe 305; the heater 3 is arranged at the top; the three layers of purification membrane plates 1, the heat insulation plate 303, the condensation plate 4, the metal partition plate 302 and the cold water runner plate 2 are all arranged in the shell 306; the three-layer purification membrane plate 1 consists of an electrospinning nanofiber layer 401, a microporous layer 403 and a backing layer 402 which are sequentially arranged;
the control part 20 comprises three electromagnetic valves 205, 209 and 211 which are respectively used for outputting unpurified seawater, purified fresh water and purified waste liquid through a feeding pipeline 5, a fresh water pipe 304 and a waste liquid pipe 305;
the detection part 40 comprises three flow meters 204, 208 and 210 which are respectively used for monitoring the flow data of the unpurified seawater, the purified waste liquid and the purified fresh water;
the storage part 50 includes a seawater tank 212, a fresh water tank 206 and a waste liquid tank 207, which respectively store unpurified seawater, purified fresh water and purified waste liquid;
the three layers of purification membrane plates 1 and the heater 3 form an evaporation structure, the cold water runner plate 2 and low-temperature seawater flowing in the cold water runner plate form a low-temperature condensation structure, in the operation process of the device, the low-temperature seawater flows into the bottom of the cold water runner plate 2 from the seawater tank 212 through the control of an electromagnetic valve along the feeding pipeline 5, flows upwards along the flow channel, flows out from the top of the low-temperature condensation structure, is heated by the heating part arranged at the top of the device, flows through the three layers of purification membrane plates 1 of the evaporation structure, and flows through the evaporation structure from top to bottom;
raw seawater enters a seawater flow channel 301 from a feeding pipeline 5, a cold water flow channel plate 2 is arranged beside the seawater flow channel 301, a fresh water flow channel 14 is arranged between the cold water flow channel plate 2 and a three-layer purification membrane plate 1, a waste liquid flow channel 12 is arranged on the other side of the three-layer purification membrane plate 1, raw seawater flows in the three-layer purification membrane plate 1, water vapor in surface air of the cold water flow channel plate 2 and a condensation plate 4 is in a saturated state, because the temperature of the three-layer purification membrane plate 1 is higher than that of the condensation runner plate, the concentration of water vapor in the air on the surface of the electrospun nano-fiber layer 401 is higher than that on the surface of the condensation plate 4, which shows that the partial pressure of water vapor on the three-layer purification membrane plate 1 is higher than that on the condensation plate 4, and the water vapor is driven by the pressure difference to evaporate and diffuse from the electrospun nano-fiber layer 401 side of the three-layer purification membrane plate 1, passes through the microporous layer 403 and the backing layer 402, and is condensed on the condensation plate 4 to generate fresh water.
The formed air gap type seawater desalinator mainly comprises parallel plates which are oppositely arranged, and is an embodiment of six groups of desalinators as shown in figures 3 and 4, 6 corresponding three layers of purification membrane plates 1, a cold water flow channel plate 2 and a condensation plate 4 are respectively arranged, 6 inlets are arranged on a feeding pipeline 5, an evaporation structure is formed by the three layers of purification membrane plates 1 and a heater 3 as shown in figure 2, a cold water flow channel plate 2 and low-temperature seawater flowing in the cold water flow channel plate form a low-temperature condensation structure, in the operation process of the device, the low-temperature seawater flows into the bottom of the cold water flow channel plate 2 from a seawater tank 212 along a bottom feeding pipeline 5 through a seawater electromagnetic valve 211, a seawater flow channel 301 is formed in the cold water flow channel plate 2, the seawater flows upwards along the seawater flow channel 301, after flowing out from the top of the cold water flow channel plate 2, the heater 3 arranged at the top of the device is heated, and then flows through the three layers of purification membrane, flowing through the evaporation structure from top to bottom.
When seawater to be purified flows in the three-layer purification membrane plate 1, water vapor in the air on the surface layers of the cold water flow channel plate 2 and the condensation plate 4 is in a saturated state, the temperature of the three-layer purification membrane plate 1 is higher than that of the condensation flow channel plate, the concentration of the water vapor in the air on the surface of the electrospun nanofiber layer 401 of the three-layer purification membrane plate 1 is higher than that of the air on the surface of the condensation plate 4, the partial pressure of the water vapor on the three-layer purification membrane plate 1 is larger than that of the water vapor on the condensation plate 4, and the water vapor is evaporated from the left side of the three-layer purification membrane plate 1 under the driving of the pressure difference, diffuses through an air gap and is condensed on. Latent heat is taken away when water evaporates on the three-layer purification membrane plate 1, the temperature of fluid is reduced, and vapor diffuses through the air gap and releases the latent heat on the condensing plate 4 to heat the low-temperature seawater on the right side of the condensing plate 4, so that energy recovery and utilization are realized. Since the latent heat of evaporation and condensation is approximately the same, the temperature difference between the fluid in the three purification membrane plates 1 and the fluid in the condensation plate 4 remains constant at the same height position, and the existence of the temperature difference enables the evaporation and condensation process of water to be carried out in the whole height direction. The heating temperature of the device is lower than the boiling point of water, and fresh water can be produced as long as the temperature difference exists between the three layers of purification membrane plates 1 and the condenser. The treated fresh water flows out to the fresh water pipe 304 through the fresh water flow passage 14 and is then conveyed to the fresh water tank 206 for storage, and the waste liquid flows out to the waste liquid pipe 305 through the waste liquid flow passage 12 and is then conveyed to the waste liquid tank 207 for storage.
Referring to FIG. 5, which shows a three-layer purification membrane plate 1 used in the present invention, the electrospun nanofiber layer 401 is made of TiO2The prepared fiber layer has the advantages of small diameter, small aperture, high porosity and good fiber uniformity, and the fiber layer also has strong corrosion resistance, hydrophobicity and stable property; the main material of the microporous layer 403 is polyvinyl acetal foam, which is white foam with an open-cell structure, has excellent hydrophilicity, can quickly absorb water, has liquid absorption capacity far higher than that of cotton yarn, is flexible and good in strength, and can be disinfected; the backing layer 402 is mainly constructed as a hard plate to enhance the strength of the three-layer filter membrane.
The outer surface of the electrospun nanofiber layer 401 is adjacent to the feed solution, while the outer surface of the backing layer 402 is the distillate side facing the condensation plate 4. Microporous layer 403 acts as a filter to remove contaminants from the vapor. The seawater three-layer purification membrane plate 1 is evaporated at the left side, and the filtered steam is diffused in the air gap condensation layer and condensed on the surface of the condensation plate 4 with lower temperature. The filter membrane structure applied by the invention adds the electrospun nanofiber layer 401 on the flowing solution side, so that the hydrophobicity of the three-layer purification membrane plate 1 is greatly increased, and therefore, the three-layer purification membrane plate 1 can be effectively and effectively used in membrane distillation, and the gaps in the microporous layer 403 are effectively protected by the electrospun nanofiber layer 401 with higher hydrophobicity. In the three-layer purification membrane panel 1, a liquid-gas interface is formed at the entrance of the membrane pores at the boundary where the flowing solution adjoins the electrospun nanofiber layer 401, and a liquid-liquid interface is formed at the entrance of the membrane pores at the boundary where the microporous layer 403 adjoins the backing layer 402. At the liquid-gas interface, the flowing solution abuts the electrospun nanofiber layer 401 and water molecules diffuse through the air gap condensation chamber to the condensation plate 4.
The three-layer purification membrane plate 1 structure of the present invention forms electrospun nanofiber layer 401 on the first surface of microporous layer 403 using electrospinning technique, and by depositing electrospun nanofiber layer 401 on the first surface of microporous layer 403, the hydrophobicity of the membrane is greatly increased when the contact angle of electrospun nanofiber layer 401 is set between 140 ° and 160 °. Microporous layer 403 will not be easily flooded with water due to the extremely high hydrophobicity of electrospun nanofiber layer 401 formed on microporous layer 403. The pore diameter of the electrospun nanofiber layer 401 is between 0.05 μm and 5.0 μm, air is trapped between pores due to the porosity and pore diameter of the electrospun nanofiber layer 401, bubbles are formed in the electrospun nanofiber layer 401, and the bubbles act as a thermal insulator, preventing heat transfer between the flowing solution and the feeding solution, thereby effectively reducing heat loss and improving energy utilization.
Referring to fig. 6, for the dc power supply section 10 of the power supply section 10, a rectifier circuit formed by diodes D1-D4 converts the alternating electrical signal output from the power transformer into pulsating dc power and outputs the dc power to the filter circuit, and the rectifier circuit mainly uses the unidirectional conductivity of the diodes to perform rectification. The rectifying circuit may be formed of one or more rectifying diodes depending on the rectifying manner.
In the filter circuit, a direct current pulse signal output by the rectifier circuit is output. The changed direct current pulse input signal enables the voltage at two ends of a capacitor in the circuit or the current flowing through an inductor to change, and the capacitors C1-C6 or the inductor can filter partial ripples in the direct current pulse signal by inhibiting the change trend of the direct current pulse signal, so that the purpose of smoothing the input signal is achieved.
The linear direct current voltage-stabilized power supply mostly adopts a linear integrated voltage-stabilizing device for voltage stabilization. The voltage stabilizing circuit designed by the linear integrated voltage stabilizing device has the advantages of simple peripheral circuit, stable output voltage, small ripple factor, low circuit noise and the like.
U1 and U2 can adopt LM78XX series and LM79XX series three-terminal integrated voltage regulators, and are the most commonly used fixed output integrated linear voltage regulator devices. Wherein, the output voltage of the LM78XX series voltage regulator is positive voltage; the output voltage of the LM79XX series voltage regulator device is a negative voltage. And the three-terminal integrated linear voltage stabilizing devices of the LM78XX series and the LM79XX series are internally provided with short-circuit protection and overheating protection circuits, so that the permanent damage of the devices caused by instantaneous overload of the circuits can be prevented.
Referring to fig. 7, which is a schematic circuit diagram of the single chip microcomputer in the control unit 20, the PIN9 RST of the single chip microcomputer AT89C52 is connected to a reset circuit, and the reset circuit is composed of a capacitor C3, a key switch S1, and a resistor R33. When the reset switch S1 is pressed, VCC is connected to RST pin by the switch, and the level of RST pin is changed from low level to high level, thus the single chip microcomputer is reset. If S1 is opened when the closing has not reached two machine cycles due to the switch jitter, the capacitor C3 and the resistor R33 will provide an RC charge delay, and the reset terminal of the single chip will remain high until the delay is over. After reset, the singlechip resets all internal data and starts to execute all program segments from 0000H.
Referring to fig. 8, which is a schematic diagram of a driving circuit of a solenoid valve, the invention uses an optical coupler U4 for isolation, the front end of the optical coupler U4 cuts off the P10 of the single chip microcomputer, an output control triode Q1, the collector of Q1 is connected with a coil of a relay, a 12V power supply is used for the relay, and the output of the relay is connected out through a terminal.
When the P10 is at high level, the optical coupler is not conducted, the base of the triode Q1 is at high level, the triode is conducted, and the relay is electrified and closed.
When the P10 is at low level, the optical coupler is conducted, the base of the triode Q1 is at low level, the triode is not conducted, the relay is not electrified, and the relay is disconnected.
According to the above, the opening and closing of the solenoid valve is controlled.
The power supply unit 10 includes a wind power generation device 201, a solar power generation device 202, and a storage battery 203 as an energy supply system, and an energy supply flowchart thereof refers to fig. 9, and includes seawater purification, data upload, operation conditions, a charging request, wind power or solar power generation, charging monitoring, and the like.
Referring to fig. 10, a flow chart of seawater transportation and recovery is shown, and in conjunction with fig. 3, a seawater tank 212 supplies purified material to the whole set of equipment, and raw seawater is transported to the equipment through an inlet pipeline 5, and a seawater flow meter 210 monitors the flow rate of seawater. The digital display control panel 215 is connected with a computer 216 to regulate and control the supply of raw materials for seawater desalination, and the quantity of seawater entering and exiting is controlled by controlling the seawater electromagnetic valve 211. After the purification is completed, the fresh water and the waste liquid are transported through the fresh water pipe 304 and the waste liquid pipe 305, detected by controlling the fresh water solenoid valve 205, the waste liquid solenoid valve 209, the fresh water flow meter 204 and the waste liquid flow meter 208, respectively, and stored in the fresh water tank 206 and the waste liquid tank 207.
The cleaning part of the invention removes waste substances such as water scales in the device by adopting an acid washing mode, injects corrosion inhibitor into a cleaning port 213 reserved on a seawater tank 212 and keeps the interior of the seawater desalination device in a system cold state circulation. After the pickling solution is prepared, the cleaning port 213 is opened to slowly inject the pickling solution, the pH value of the liquid in the waste liquid tank 207 is measured, when the pH value meets the requirement, the acid addition is stopped to keep the system circulation, and the pH acidity is monitored in real time to be recorded. After the purification device is cleaned, the waste liquid solenoid valve 209 is opened to transfer the waste water to the waste liquid tank 207. Injecting fresh seawater into the seawater tank 212, checking whether the liquid in the system is acidic through a pH detector 214 arranged in the waste liquid tank 207, and discharging all effluent liquid until the pH of the discharged liquid is the same as that of the original seawater. The system was then flushed thoroughly, and all effluent was drained. The flow chart is shown in fig. 11.
The corrosion inhibitor adopted by the invention mainly comprises organic phosphine, copolymer, copper corrosion inhibitor and the like, and comprises the following components: amino trimethylene phosphonic acid, polyacrylic acid and acid pickling corrosion inhibitor. Has good corrosion inhibition performance on carbon steel, copper and copper alloy, and has excellent scale inhibition and dispersion performance on calcium carbonate and calcium phosphate.
It is to be understood that the exemplary embodiments described herein are illustrative and not restrictive. Although one or more embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (10)
1. An integrated seawater purification device is characterized by comprising a power supply part, a control part, a purification part, a detection part and a storage part, wherein the power supply part supplies power to the control part and the detection part, the purification part desalts input seawater, the detection part detects unpurified seawater, purified fresh water and purified waste liquid in the purification part and feeds the unpurified seawater, purified fresh water and purified waste liquid back to the control part, and the storage part respectively stores the unpurified seawater, purified fresh water and purified waste liquid;
the purification part comprises three layers of purification membrane plates, a heater, a heat insulation plate, a shell, a condensation plate, a metal partition plate, a cold water runner plate, a feeding pipeline, a fresh water pipe and a waste liquid pipe; the heater is arranged at the top; the three layers of purification membrane plates, the heat insulation plate, the condensation plate, the metal partition plate and the cold water flow channel plate are all arranged in the shell; the three-layer purification membrane plate consists of an electrospinning nanofiber layer, a microporous layer and a back lining layer which are sequentially arranged;
the control part comprises three electromagnetic valves which are respectively used for outputting unpurified seawater, purified fresh water and purified waste liquid through a feeding pipeline, a fresh water pipe and a waste liquid pipe;
the detection part comprises three flowmeters which are respectively used for monitoring the flow data of the unpurified seawater, the purified waste liquid and the purified fresh water;
the storage part comprises a seawater tank, a fresh water tank and a waste liquid tank, and is used for respectively storing unpurified seawater, purified fresh water and purified waste liquid;
the device comprises a seawater tank, a feed pipeline, a cold water flow channel plate, a heater, a heating part, a water tank, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the three layers of purification membrane plates and the heater form an;
the method is characterized in that unpurified seawater enters a seawater flow channel from a feeding pipeline, a cold water flow channel plate is arranged beside the seawater flow channel, a fresh water flow channel is arranged between the cold water flow channel plate and the three layers of purification membrane plates, a waste liquid flow channel is arranged on the other side of the three layers of purification membrane plates, the unpurified seawater flows in the three layers of purification membrane plates, water vapor in the air on the surfaces of the cold water flow channel plate and the condensation plate is in a saturated state, the temperature of the three layers of purification membrane plates is higher than that of the condensation flow channel plate, the concentration of the water vapor in the air on the surfaces of the electrospun nanofiber layers is higher than that of the condensation plate, the partial pressure of the water vapor on the three layers of purification membrane plates is larger than that on the condensation plate, and the partial pressure of the water vapor is evaporated and diffused from the sides of the electrospun nanofiber layers of.
2. The integrated seawater purifying apparatus of claim 1, further comprising a cleaning part for removing scale and residue from the storage part.
3. The integrated seawater purification apparatus of claim 2, wherein the cleaning part comprises a pH detector disposed in the waste liquid tank and a cleaning port disposed on the seawater tank, the pH detector measures the pH of the liquid in the waste liquid tank, and the corrosion inhibitor and the pickling solution are injected into the seawater tank through the cleaning port.
4. The integrated seawater purification apparatus of claim 3, wherein the corrosion inhibitor comprises an organic phosphine, a copolymer and a copper corrosion inhibitor.
5. The integrated seawater purification apparatus of claim 1, wherein the power supply part comprises a wind power generation device, a storage battery, a solar power generation device and a voltage converter, wherein the wind power generation device and the solar power generation device charge the storage battery, and the voltage converter converts the voltage of the storage battery and supplies the converted voltage to the control part and the detection part.
6. The integrated seawater purification apparatus of claim 1, wherein the electrospun nanofiber layer has a contact angle of 140 ° to 160 °.
7. The integrated seawater purification apparatus of claim 1, wherein the pore size of the electrospun nanofiber layer is in the range of 0.05 μ ι η to 5.0 μ ι η.
8. The integrated seawater purification apparatus of claim 1, wherein the electrospun nanofiber layer is prepared from titanium dioxide.
9. The integrated seawater purification apparatus of claim 1, wherein the microporous layer comprises a polyvinyl acetal foam material.
10. The integrated seawater purification apparatus of claim 1, wherein the solenoid valve is switched by a relay.
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| CN202010981561.XA CN112194300A (en) | 2020-09-17 | 2020-09-17 | Integral type sea water purifier |
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| CN111087044A (en) * | 2019-12-11 | 2020-05-01 | 江苏大学 | Solar air gap membrane distillation seawater desalination device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20100108875A (en) * | 2009-03-30 | 2010-10-08 | 한국기계연구원 | Freshwater equipment the utilization exhaust heat and freshwater a method for the same |
| CN103998115A (en) * | 2011-11-17 | 2014-08-20 | 义安理工学院 | A triple layer hydrophobic-hydrophilic membrane for membrane distillation applications |
| CN105413488A (en) * | 2015-12-11 | 2016-03-23 | 上海交通大学 | Preparation method and application of super-hydrophobic membrane |
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Application publication date: 20210108 |