CN114516669A - Solar seawater desalination device - Google Patents

Solar seawater desalination device Download PDF

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Publication number
CN114516669A
CN114516669A CN202011301787.7A CN202011301787A CN114516669A CN 114516669 A CN114516669 A CN 114516669A CN 202011301787 A CN202011301787 A CN 202011301787A CN 114516669 A CN114516669 A CN 114516669A
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water
evaporation
unit
vacuum
pipeline
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CN114516669B (en
Inventor
郭春生
刘元帅
蔡嘉宁
李家臻
胡芷晴
秦一鹏
王媛
史鉴兴
郭安南
其他发明人请求不公开姓名
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Shandong University
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Shandong University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/08Thin film evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/043Details
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/14Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08Seawater, e.g. for desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20Controlling water pollution; Waste water treatment
    • Y02A20/208Off-grid powered water treatment
    • Y02A20/212Solar-powered wastewater sewage treatment, e.g. spray evaporation

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The invention provides a solar seawater desalination device which comprises a film evaporation unit, an automatic water supply unit, a gas control unit and a post-treatment unit, wherein the automatic water supply unit supplies seawater to the film evaporation unit, water vapor is generated in the film evaporation unit through evaporation, the water vapor is output to the post-treatment unit, the gas control unit comprises a vacuum pump and an air blower, a control system controls the vacuum pump and the air blower to be switched, the vacuum environment of seawater evaporation is realized through the vacuum pump, and then when seawater desalination operation is performed to discharge wastewater, the air blower inputs air and discharges the wastewater outwards. The loop heat pipe solar heat collector with a novel structure is designed, a liquid area is heated in a targeted manner, the utilization efficiency of solar energy is improved, and the effects of environmental protection and energy conservation are achieved.

Description

Solar seawater desalination device
Technical Field
The invention belongs to the field of solar energy, and particularly relates to a solar seawater desalination system.
Background
With the rapid development of modern socioeconomic, the demand of human beings on energy is increasing. However, the continuous decrease and shortage of traditional energy reserves such as coal, oil, natural gas and the like causes the continuous increase of price, and the environmental pollution problem caused by the conventional fossil fuel is more serious, which greatly limits the development of society and the improvement of the life quality of human beings. Energy problems have become one of the most prominent problems in the world today. Therefore, the search for new energy sources, especially clean energy sources without pollution, has become a hot spot of research.
The solar energy is an inexhaustible clean energy and has huge resource quantity, and the total quantity of solar radiation energy collected on the surface of the earth every year is 1 multiplied by 1018kW.h, which is ten thousand times of the total energy consumed in the world year. The utilization of solar energy has been used as an important item for developing new energy in all countries in the world, and the active development of new energy has been clearly proposed in China, wherein the utilization of solar energy particularly occupies a prominent position. However, the solar radiation has a small energy density (about one kilowatt per square meter) and is discontinuous, which brings certain difficulties for large-scale exploitation and utilization. Therefore, in order to widely use solar energy, not only the technical problems should be solved, but also it is necessary to be economically competitive with conventional energy sources.
The shortage and the increasing demand of fresh water resources become a very important problem for people in the last century, and therefore, it is necessary to obtain fresh water resources from waste water, salt water, ground, sea water and other alternative resources. Since 97% of water on the earth is seawater, the seawater desalination technology has great application prospect in solving the problem. At present, the common commercial solar seawater desalination mode has a complex structure and can consume high-grade energy seriously.
Based on the universality and indifference of solar energy distribution, the solar distiller can provide a solution for water shortage in remote and arid areas; meanwhile, the industrialization of module scale can be realized. The solar still has the characteristics of simple structure, low cost, available local materials, low maintenance cost and the like. However, since the solar still has long water production time and low efficiency, the daily production capacity is about 2-3L/m2Thermal efficiency is about 30%, so solar distillers are not generally used. Accordingly, there is a need in the art for further improvements or improvements to better achieve efficient use of solar energy to drive water evaporation and accelerated condensation to meet the needs of modern clean drinking water.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the high-efficiency focusing solar seawater desalination device, which can reduce the cost and effectively utilize solar energy.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a solar energy sea water desalination device, includes film evaporation unit, automatic water supply unit, gas control unit and aftertreatment unit, the automatic water supply unit supplies the sea water to film evaporation unit, and evaporation produces vapor in film evaporation unit, vapor exports aftertreatment unit, gas control unit includes vacuum pump and air blower, switching between control system control vacuum pump and the air blower realizes the vacuum environment of sea water evaporation through the vacuum pump, then when the sea water desalination moves to needs and carries out the waste water of wasting discharge, air blower input air, outside waste water of discharging.
Preferably, the film evaporation unit comprises a working area and a water replenishing area, the working area and the water replenishing area are communicated with each other through a pipeline, and water is replenished to the working area from the water replenishing area.
Preferably, the water replenishing zone is at a height slightly above the evaporation zone.
Preferably, a valve for controlling the flow is connected to a pipeline from the water replenishing area to the evaporation area.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, water is rapidly changed into water vapor by the heat generated under the vacuum condition, the water vapor is condensed and purified to reach the drinking standard, and after the operation of discharging wastewater, the wastewater is discharged by the air blower, so that the intelligent switching function of discharging seawater, fresh water and wastewater is realized, the wastewater discharge is further promoted, and the descaling effect of an evaporation area is realized by blowing air.
2. The organic glass cover in the evaporation area of the core area of the device adopts a hemispherical double-layer inner vacuumizing design, and the device has the advantages of keeping the temperature in the evaporation cover and improving the evaporation efficiency of water.
3. Before the evaporation operation, the thin film evaporation unit of the device is vacuumized, so that the air pressure in the unit is reduced, and the boiling point of water is reduced. The advantage is that the evaporation rate of water is further improved by applying the vacuum evaporation principle.
4. The top end of the hemispherical double-layer organic glass cover, the top end of the water replenishing tank and the pipeline at the front part of the electromagnetic valve 7 for vacuumizing the evaporation area and discharging condensed water are connected by the transparent hose, the advantage of the design is that the gas pressure in the evaporation area and the water replenishing area is always kept consistent, and when the two areas are replenished with water by utilizing the principle of a communicating vessel, the flow velocity of water entering the evaporation area from the water replenishing area is stable.
5. The device collects water vapor by using a transparent hose for a pipeline at the top end of a hemispherical double-layer organic glass cover, the top end of a water supplementing tank and the front part of an electromagnetic valve 7 for vacuumizing an evaporation area and discharging condensed water; the pipeline for receiving the condensed water of the drainage ring is used for collecting the condensed water, and the advantage is that gas-liquid two-phase multiple collection is realized.
6. PDMS film has been pasted at double-deck organic glass cover innermost to the sculpture width and the degree of depth have been 0.5 mm's rectangle microchannel on the film, and its advantage is to make the water droplet merge the speed and accelerate, thereby be favorable to releasing surface space, do benefit to that vapor further condenses while surface heat transfer coefficient is high, can guarantee that vapor lasts the condensation and the surface flow resistance is little, be favorable to the liquid droplet landing and remove, improve the water intaking volume.
7. By adopting the nano porous graphene oxide film, the porous graphene not only keeps the excellent properties of graphene, but also promotes the improvement of the material transportation efficiency due to the existence of pores compared with the inert graphene surface. Meanwhile, the flexibility and the cost of the graphene oxide are more potential advantages than those of single-layer graphene. The unique properties of graphene oxide thin films make them the best candidate membranes for filtration or desalination applications. The device has the advantages that the porous graphene oxide film has the advantages, and the device is an excellent water purification new material integrating high efficiency and energy conservation.
8. And the light energy evaporation film is adopted, so that the energy is saved, the environment is protected, and the efficiency is high. The graphene oxide is used as a high-efficiency and stable photo-thermal conversion material, and has the advantage that low-grade, discontinuous-dispersion solar energy can be converted into high-grade heat energy, so that the solar energy can be utilized to the maximum extent. The device can fully absorb heat generated by solar energy, quickly change water into vapor, and realize separation of liquid phase and gas phase so as to achieve the water purification effect.
And 9, the PLC control system is divided into two operation modes of automatic control and manual control, and has the advantages that the simple and convenient full-automatic operation requirement in normal operation can be met, the operation can be manually adjusted according to special working conditions and special requirements, and the operation mode is very simple and easy to operate.
10. The device is small in size and convenient to carry, the whole volume is 800 × 500 mm, the occupied area is about 0.4 square meter, and the device can be widely applied to the field of ships and can be operated remotely.
11. The power consumption of the device is 2.056 degrees each day under the whole-day operation condition. When the solar cell panel is adopted to supply power to the device, an external power supply is not needed. The unit water production price of the device is 1-3 yuan lower than that of other products in the market.
12. The residual heat of flue gas on the ship is fully utilized to heat the water replenishing tank, and the full utilization of heat energy is realized.
13. The utility model provides a new samming device through set up the drainage plate in flue gas pipe for gaseous some flows along the drainage plate and guides to opposite direction, with the gaseous intensive mixing of opposite direction entering, thereby realize that gaseous temperature is even, in order to realize further heat transfer needs, improve product life.
Drawings
FIG. 1 is a schematic diagram of the structure of the main components of a solar seawater desalination plant
FIG. 2-1, 2-2, 2-3 is a diagram of the internal structure of a solar seawater desalination system
FIG. 3 is a schematic diagram of a thin film evaporation unit
FIG. 4 is a cross-sectional view of a thin film evaporation unit of the present invention;
FIG. 5 is a schematic view of the appearance of the plexiglass cover of the present invention;
FIG. 6 is a schematic view of a die assembly of the present invention;
FIG. 7 is a schematic view of a condensate drain ring structure according to the present invention;
FIG. 8 is an axial sectional view of a flue gas duct of the present invention provided with a flow guide plate;
figure 9 is a schematic diagram of the size of the flue gas duct setting baffle of the present invention.
FIG. 10 is a perspective view of 1 drainage plate per layer.
FIG. 11 is a perspective view of 3 drainage plates per layer.
Fig. 12 is a product entity diagram of the solar seawater desalination device.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of main components of a practical product of the device. As shown in fig. 1, seawater passes through a joint 3, is treated by a pretreatment filter element, enters a water supplementing tank through a water pump 2, then enters an evaporation area through the water supplementing tank, is evaporated in the evaporation area, and is condensed into fresh water after being evaporated, and the fresh water enters a water storage tank for storage. Fresh water passes through the water pump 1, then is filtered by the post-treatment filter element, and is utilized through the joint 4. The spent brine from the evaporation zone is discharged to a waste water collection unit.
Preferably, an electromagnetic valve 1 is arranged between the water pump 2 and the water replenishing tank, and the electromagnetic valve 1 is used for controlling the water pump to flow. The moisturizing case sets up on water pump upper portion, through setting up solenoid valve 1, prevents that the water that has got into the moisturizing case from under the action of gravity, reverse backward flow to water pump, alleviates the pressure that the water pump impeller receives, improves the water pump life-span.
Preferably, an electromagnetic valve 9 is arranged between the water pump 1 and the water storage tank, and the electromagnetic valve 9 is used for controlling the water pump to work. The electromagnetic valve 9 has the functions of: the water entering the water storage tank is prevented from flowing downwards to the water pump under the action of gravity, the pressure borne by the impeller of the water pump is reduced, and the service life of the water pump is prolonged. 2 the time of the fresh water collected in the water storage tank of the discharging device can be controlled by controlling the opening and closing of the electromagnetic valve 9.
Preferably, an electromagnetic valve 2 is arranged between the evaporation area and the wastewater collection device, and the wastewater is discharged by opening and closing the electromagnetic valve 2.
The device is a solar vacuum seawater desalination device based on photothermal conversion and nano porous graphene oxide materials. The device is controlled by a PLC control system based on a mechanical system and integrally adopted, and can realize automatic operation of the platform. The photo-thermal material graphene oxide film fully absorbs and utilizes solar energy, and the generated heat rapidly changes water into water vapor under the vacuum condition, so that the water vapor is condensed and purified to reach the drinking standard.
As described in further detail below. As shown in fig. 1, solar seawater desalination system, including film evaporation unit, automatic water supply unit, gas control unit and aftertreatment unit, the automatic water supply unit supplies the sea water to film evaporation unit, evaporates the vapor in film evaporation unit, the vapor exports aftertreatment unit, gas control unit includes external vacuum pump and external machine of blowing, switching between control system control vacuum pump and the machine of blowing realizes the vacuum environment of sea water evaporation through the vacuum pump, then when the seawater desalination moves to needs and carries out the waste water of arranging, closes the vacuum pump, and the machine of blowing inputs air, outside exhaust waste water. According to the invention, water is rapidly changed into water vapor by the heat generated under the vacuum condition, the water vapor is condensed and purified to reach the drinking standard, and after the operation of discharging wastewater, the wastewater is discharged by the air blower, so that the intelligent switching function of discharging seawater, fresh water and wastewater is realized, the wastewater discharge is further promoted, and the descaling effect of an evaporation area is realized by blowing air.
The evaporation principle of the film evaporation unit is that the micro-nano film material absorbs light energy and heat energy in the environment to be converted into self heat, and water molecules on the surface of the film material are heated to be continuously converted into steam. Because of the gas concentration difference in the pipeline, the steam can automatically flow in the pipeline.
The vacuum evaporation principle used means: the evaporation operation is carried out under vacuum, i.e. the boiling point of the solution is lowered at low pressure and a large amount of water is evaporated with less steam. By utilizing the principle, the boiling point of the solution can be effectively reduced, and the utilization of a low-temperature heat source is realized, so that the energy consumption is reduced.
As shown in fig. 3 and 4, the film evaporation unit comprises an evaporation area and a water replenishing area, the two areas are communicated with each other through a pipeline, and water is replenished to the evaporation area from the water replenishing area. The water replenishing area is slightly higher than the evaporating area, so that the water consumption of the film evaporating area is sufficient, the tension of the surface of the film is stable, the film can be fully contacted with the liquid level in the evaporating process, and the evaporating process is better realized. Preferably, a manual regulating valve for controlling the flow is connected to a pipeline from the water replenishing area to the evaporation area, and the water in the test area can not submerge the membrane by manually or automatically regulating the flow.
Preferably, a water level meter is arranged in the evaporation area and used for measuring the water level in the evaporation area, the water level meter is in data connection with a controller, and the controller automatically controls the opening and closing of the valve according to the water level measured by the water level meter.
When the water level measured by the water level gauge reaches the height of the film, the controller controls the valve to be closed, the phenomenon that the water level is too high to cover the film is avoided, and when the water level measured by the water level gauge is lower than the height of the porous medium, the controller controls the valve to be opened, the phenomenon that the water level is too low is avoided, and therefore the seawater desalination efficiency is influenced.
Preferably, the evaporation zone comprises an organic glass cover, a shell component, a pressed film component and a nano-porous graphene oxide film.
Preferably, the organic glass cover is of a double-layer semicircular arc structure. The organic glass cover adopts the 'pot cover principle', so that the liquefied water can directly flow down along the inner wall of the semicircular glass cover, and the nano porous graphene oxide film is prevented from being wetted by the direct flow-down of the water, and the evaporation rate is influenced. The organic glass plate is a high-transmittance organic glass plate and is placed at the top of the evaporation area to meet the illumination condition. Meanwhile, the organic glass cover adopts a double-layer design, and the vacuumizing treatment is performed in the middle of two layers of organic glass in advance, so that the purpose is to insulate heat, and the heat of an evaporation area is prevented from being dissipated to the environment through the organic glass cover so as to collect more water vapor.
PDMS film has been pasted at double-deck organic glass cover innermost to the sculpture width and the degree of depth have been 0.5 mm's rectangle microchannel on the film, and its advantage is to make the water droplet merge the speed and accelerate, thereby be favorable to releasing surface space, do benefit to that vapor further condenses while surface heat transfer coefficient is high, can guarantee that vapor lasts the condensation and the surface flow resistance is little, be favorable to the liquid droplet landing and remove, improve the water intaking volume.
Preferably, the housing assembly is three layers, stacked one on top of the other. From bottom to top, the first layer is the portion of the evaporation zone in the base that is shared by the evaporation zone and the water replenishing zone in the thin film evaporation unit. It is used for placing a metal porous medium which sucks water from the lower part to the upper part of the medium through capillary suction. The second layer is a cylindrical shell on the base and below the double-layer organic glass cover. The middle part of the shell is provided with a drainage hole which is externally connected with a condensed water collecting pipeline, and the inner side of the drainage hole is aligned with the lowest point of the condensed water drainage ring. The inside of the shell is divided into two parts, the inner diameter of the lower part is small, and the inner diameter of the upper part is large, so that the film pressing assembly can be placed in the shell. The nano porous graphene oxide film is arranged on the upper portion of the porous medium and used for uniformly diffusing water absorbed by the metal porous medium, fully absorbing and utilizing solar energy, rapidly changing water into water vapor by heat generated by the nano porous graphene oxide film under a vacuum condition, and the third layer shell is arranged on the second layer shell and is hermetically connected with the second layer shell to ensure the fixation and airtightness of the whole evaporation area. The edge of the plexiglass cover is embedded between the second and third shells. Preferably, the three layers of the housing assembly are insulated to prevent heat from the membrane from being dissipated to the housing assembly in a thermally conductive manner. The two-layer dismantlement of inside can carry out artifical clearance impurity to inside after long-time work, prevents to block up.
As shown in fig. 4 and 7, the laminated film assembly is disposed on the second housing assembly, and includes a lower laminated film assembly and an upper laminated film assembly, the lower laminated film assembly includes a sponge porous medium, and the upper laminated film assembly includes a nano-porous graphene oxide film. This application has adopted nanometer porous graphene oxide film, and porous graphene has not only kept the good nature of graphite alkene, compares the graphite alkene surface of inertia moreover, and the existence in hole has promoted the improvement of material transport efficiency. Meanwhile, the flexibility and the cost of the graphene oxide are more potential advantages than those of single-layer graphene. The unique properties of graphene oxide thin films make them the best candidate membranes for filtration or desalination applications. The device has the advantages that the porous graphene oxide film has the advantages, and the device is an excellent water purification new material integrating high efficiency and energy conservation. And the light energy evaporation film is adopted, so that the energy is saved, the environment is protected, and the efficiency is high. The graphene oxide is used as a high-efficiency and stable photo-thermal conversion material, and has the advantage that low-grade, discontinuous-dispersion solar energy can be converted into high-grade heat energy, so that the solar energy can be utilized to the maximum extent. The device can fully absorb heat generated by solar energy, quickly change water into vapor, and realize separation of liquid phase and gas phase so as to achieve the water purification effect.
A drainage ring is arranged above the film pressing component. As shown in fig. 7, the drain ring includes a horizontal wall provided at the filter paper pressing sheet and a vertical wall provided inside the horizontal wall and extending upward such that the cross-section of the drain ring forms an L-shape. The water outlet is arranged on the shell opposite to the vertical wall. By providing a drainage ring, water condensing on the perspex will flow down the tube wall and around the drainage ring into the pipe. Preferably, the horizontal wall may be provided as an inclined wall, so that the drain ring is designed to have an inclined angle, which may prevent the water leakage problem, so that the liquefied water flows out of the evaporation zone instantly.
Preferably, the water outlet is opposite the lowest point of the drain ring.
Preferably, the water outlet is also an air outlet at the same time, and the air outlet is connected with the air blower through a pipeline. When air needs to be conveyed, the electromagnetic valve 7 on the water outlet pipeline is closed, the electromagnetic valve on the air outlet pipeline is opened, air is blown to the inside, the blowing has the effect of blowing air to cause dirt on the surface of the evaporation area, and simultaneously, accumulated water is further blown away, so that the water yield is calculated more accurately. Preferably, the shell component at the lower part of the sponge porous medium is provided with an air blowing port, and the lower part of the first layer shell component is provided with a wastewater outlet. Through setting up the waste water mouth, realize the emission of waste water. Through setting up the mouth of blowing, can further realize waste water discharge and scale removal effect.
Preferably, the bottom of the evaporation zone is provided with a seawater concentration detection device for detecting the concentration of seawater, and the controller automatically controls the seawater discharge according to the detected seawater concentration. If the measured seawater concentration exceeds a certain value, the controller controls the electromagnetic valve 2 to be opened, the wastewater outlet at the lower part of the evaporation area is opened, and the strong brine is discharged through the wastewater outlet. If the measured seawater concentration is lower than a certain value, the controller controls the circulation solenoid valve 2 to be closed.
Preferably, the automatic water supply unit can realize continuous and stable input of seawater and real-time adjustment of water delivery rate according to water level change in the evaporation process.
This automatic water supply unit is through being linked together with outside storage water tank, and the pretreatment filter core is connected through joint 3 to outside storage water tank, realizes the water supply to device moisturizing case. The control of the water supply speed and the start and stop of the water supply function are realized by using the electromagnetic valve. And monitoring the internal pressure of the pipeline in real time by using a pressure sensor. The water level of the upper water replenishing tank of the device is monitored by a device water level meter. The seawater which is pretreated is stored by the water replenishing tank, so that the influence on the evaporation environment in the film evaporation area due to the change of water pressure in the water supply process is avoided.
The automatic water supply unit comprises a water inlet pipeline, an external water storage tank, an electromagnetic valve 1, a pressure sensor, a water level sensor, a pretreatment filter element and a water pump 2. The external storage water tank of water inlet line connection, external storage water tank pass through joint 3 and connect the pretreatment filter core, and pretreatment filter core connects water pump 2, sets up the storage water tank between water pump 2 and the pretreatment filter core. An electromagnetic valve 1 is arranged between the water pump 2 and the water replenishing tank
The water inlet pipeline in the automatic water supply unit is positioned in front of the water replenishing tank, and the water inlet pipeline interface is led to the outside of the external water storage tank body and is used for connecting the external water tank or directly connecting a water source; the electromagnetic valve is arranged on the water inlet pipeline and controls the water pump to pump seawater to be input into the water storage tank from the primary filtering device; the pressure sensors are respectively positioned on the water inlet pipelines and used for monitoring the pressure change of the film evaporation area in real time; the water level of the water replenishing tank of the water level gauge monitoring device is utilized to judge the water consumption condition of the evaporation area, and then the water level of the water replenishing tank is controlled by opening and closing the electromagnetic valve 1 and opening and closing the water pump 2, so that the automatic control of the water consumption of the film evaporation area and the stability of the water pressure are ensured.
The gas control unit completes the conversion between the vacuum environment module and the gas inlet module through the switching between the external vacuum pump and the gas blower.
The vacuum environment control module can vacuumize the interior of the device, so that a vacuum environment in the device is constructed.
The vacuum environment control module can vacuumize the interior of the device, create a vacuum environment for an evaporation process, realize the utilization of a vacuum evaporation principle, and effectively increase the evaporation rate by exhausting air in the device.
The vacuum environment control module realizes the vacuum pumping treatment of the interior of the device by a vacuum pump; controlling the connection and disconnection of the vacuum pump and the evaporation area by using an electromagnetic valve; the degree of vacuum in the pipe is detected by a pressure vacuum sensor, and the degree of progress of the vacuum process is determined.
The technical indexes which can be realized by the unit are as follows: the vacuum degree in the device is less than 1 Pa.
As shown in fig. 1, the vacuum environment control module comprises a solenoid valve 5, a pressure vacuum sensor, a solenoid valve 7, a solenoid valve 3, and a vacuum pumping device, preferably a vacuum pump. The vacuumizing device is connected with the evaporation area through the electromagnetic valve 5 and the electromagnetic valve 7, the water storage tank is connected to a pipeline between the electromagnetic valve 5 and the electromagnetic valve 7, the electromagnetic valve 3 is arranged on the pipeline between the water storage tank and the electromagnetic valve 5 and the pipeline between the water storage tank and the electromagnetic valve 7, and the pressure vacuum sensor is connected with the evaporation area and used for detecting the vacuum degree of the evaporation area.
Preferably, before the device is operated, the solenoid valves 3 and 6 are closed, the solenoid valves 5 and 7 are opened, and the evaporation area is vacuumized by the vacuumizing device.
Preferably, in operation, the solenoid valve 5 is closed and the solenoid valves 7, 3 are opened so that condensate is continuously drained into the reservoir. When the vacuum degree detected by the vacuum pressure sensor does not meet the requirement, the electromagnetic valve 5 is opened, and the vacuumizing device performs vacuumizing operation. When the vacuum degree detected by the vacuum pressure sensor reaches the requirement, the electromagnetic valve 5 is closed, and the vacuumizing device stops vacuumizing operation.
By vacuumizing the water storage tank and the evaporation area,the device can create a vacuum environment in its entirety, including the evaporation zone of the device Vacuumizing and vacuumizing the water storage tank. Thereby further improving the efficiency of seawater desalination.
Preferably, before the device is operated, the electromagnetic valves 7 and 6 are closed, the electromagnetic valves 3 and 5 are opened, and the operation is performed by a vacuum-pumping device And (5) vacuumizing the water storage tank.
The pressure vacuum sensor is arranged on a pipeline between the vacuum environment control unit and the thin film evaporation area unit, can monitor the vacuum degree in the pipeline in real time, further judges the proceeding degree of vacuum pumping treatment, feeds the degree back to the electromagnetic valve 5 from the proceeding degree, and controls the on-off of the vacuum pump and the evaporation area. Preferably, the external vacuum pump consists of a VRD-4 bipolar rotary vane vacuum pump and a KF16 multiplied by 100 vacuum bellows, wherein the KF16 multiplied by 100 vacuum bellows is used as an air extraction pipeline and is connected with an internal pipeline interface of the device. The vacuum pump is a VRD-4 bipolar rotary vane vacuum pump, an automatic anti-oil return valve is arranged in the vacuum pump, the limiting pressure is 0.5Pa, and the interface is KF 16. The vacuum pump is arranged at a position which is not contacted with the box body, so that the influence of the vibration generated by the vacuum pump on the evaporation can be prevented. Because the evaporation medium is vapor, so in order to prevent polluting the vacuum gauge and causing damage, the vacuum gauge is arranged at the opening of the vacuum pump, and the measurement range of the used vacuum gauge is as follows:
the air inlet module can blow dry air into the device before a working period begins, and the water yield in the evaporation process can be correctly measured.
The air inlet module can blow dry air into the device after one working period is finished, so that steam generated in the evaporation process can be liquefied sufficiently and flows out, and waste water can be discharged completely.
The air inlet module uses a compressor device to blow dry air into the pipeline; liquefying the residual water vapor by using a condenser; the air outlet is used for discharging air, the electromagnetic valve 5 is used for controlling the on-off of the compressor device and the inside of the device, and the device at the air outlet is communicated with the atmosphere.
The collecting and measuring unit can further purify the evaporated seawater to reach the standard of drinking water, and simultaneously obtain the real-time evaporation parameters and the average evaporation parameters of the film material.
The post-treatment unit comprises a filtering device, and the liquefied water is treated by the filtering device. The filtering device sequentially comprises a PP filter element, a resin filter element, RO reverse osmosis and active carbon, thereby realizing the secondary purification of the liquefied water. The PP filter element realizes the filtration of impurities, colloid and macromolecules; the resin filter element achieves the effects of desalting water and changing hard water into soft water; the RO realizes the removal of ions and germs; the post-positioned active carbon is used for improving the taste of the drinking water.
As shown in fig. 1, the post-treatment unit consists of a water storage tank, a post-treatment filter element and a water pump 1. And the condensed water of the evaporation device enters the post-treatment module. The water storage tank is connected with the electromagnetic valve 9 through a pipeline, then connected with the water pump 1 through a pipeline, and finally connected with the filter element through a pipeline.
The input pipeline of the post-treatment device is connected with the condenser pipeline, the output pipeline is directly connected with the collecting device, the tail end of the input pipeline is connected with the water storage tank, the water outlet of the water storage tank is connected with the electromagnetic valve 9 and the water pump 1, the electromagnetic valve 9 controls the water pump pipeline to be opened and closed, and the water outlet of the water pump is connected with the filter element to ensure that liquid water is fully filtered by a filter membrane in the post-treatment device and make residual condensed water in the device to be discharged. Preferably, VCR connectors are adopted at the pipelines at the two sides of the post-processing device, so that the post-processing device is convenient to disassemble.
The wastewater treatment device can realize the discharge of wastewater and ensure the density of seawater in the evaporation zone.
After the evaporation is carried out for a certain time, preferably 5 hours, the whole device integrally carries out a cycle of air inflation, waste water discharge, vacuum pumping and water inlet, the unit reduces the internal and external pressure difference after the air inflation, and opens the electromagnetic valve so as to discharge the waste water in the evaporation area by using the gravity effect.
The wastewater treatment device comprises an external wastewater tank, an electromagnetic valve 2 and a pipeline. Solenoid valve 2 is located between evaporation zone and the external waste water tank, and through opening solenoid valve 2, the waste water in the device evaporation zone can be because self gravity and all flow into in the external waste water tank, opens the module of admitting air, and the residual waste water in the promotion device is discharged to the device internal blowing.
Before evaporation operation, the device needs to be subjected to vacuum treatment through a vacuum environment control module to reduce the boiling point of water so as to ensure the evaporation efficiency. The vacuum environment control module consists of an electromagnetic valve 5, a pressure vacuum sensor, an external vacuum pump and a pipeline. The electromagnetic valve 5 is arranged on the air exhaust pipeline and can control the connection and disconnection of the vacuum pump and the evaporation area. The pressure vacuum sensor is arranged on a pipeline between the vacuum environment control unit and the thin film evaporation area unit, can monitor the vacuum degree in the pipeline in real time, further judges the proceeding degree of vacuum pumping treatment, feeds the degree back to the electromagnetic valve 5 from the proceeding degree, and controls the on-off of the vacuum pump and the evaporation area. The external vacuum pump consists of a VRD-4 bipolar rotary vane vacuum pump and KF16 multiplied by 100 vacuum bellows, wherein the KF16 multiplied by 100 vacuum bellows is used as an air extraction pipeline and is connected with an internal pipeline interface of the device. The vacuum pump is a VRD-4 bipolar rotary vane vacuum pump, an automatic anti-oil return valve is arranged in the vacuum pump, the limiting pressure is 0.5Pa, and the interface is KF 16. The vacuum pump is arranged at a position which is not contacted with the box body, so that the influence of the vibration generated by the vacuum pump on the evaporation can be prevented. Because the evaporation medium is vapor, consequently in order to prevent to pollute the vacuum gauge, cause the damage, the vacuum gauge will be placed in the vacuum pump mouth, and used vacuum gauge measuring range is: 1X 10-5~1×105Pa
Seawater enters the device through the automatic water supply unit and supplies water to the water replenishing area of the film evaporation area, and the automatic water supply unit is communicated with an external water storage tank to realize water supply to a water tank of the device. The control of the water supply speed and the start and stop of the water supply function are realized by using the electromagnetic valve. And monitoring the internal pressure of the pipeline in real time by using a pressure sensor. The water level in the upper tank of the device is monitored by a transparent hose on the right side of the device. The upper water storage tank is utilized to store the pretreated seawater, so that the influence on the evaporation environment in the film evaporation area due to the change of water pressure in the water supply process is avoided.
The film evaporation area comprises an evaporation area and a water replenishing area, the two areas are mutually communicated through a pipeline, and water is replenished to the evaporation area from the water replenishing area. The water replenishing area is slightly higher than the evaporating area, so that the water in the film evaporating area is sufficient, the tension of the surface of the evaporating film is stable, the evaporating film can fully contact the liquid level in the evaporating process, and the evaporating process is better realized. Two areas connect the pipes: the pipeline from the water replenishing area to the evaporation area is connected with a valve for controlling the flow, and the water in the test area can not submerge the film by manually adjusting the flow. The sewage evaporates in the evaporation zone and condenses on the plexiglas housing, and the condensed water will flow down the housing walls and around the drain into the pipe. The water discharge ring is designed to have an inclination angle, so that the problem of water leakage caused by water storage can be prevented, and liquefied water can flow out of the evaporation area immediately.
Condensed water flowing out of the evaporation zone enters the post-treatment unit through a pipeline, an input pipeline of the post-treatment device is connected with the pipeline of the evaporation zone, an output pipeline is directly connected with the collecting device, the tail end of the input pipeline is connected with the water storage tank, a water outlet of the water storage tank is connected with the electromagnetic valve 9 and the water pump 1, the electromagnetic valve 9 controls the pipeline of the water pump to be opened and closed, and a water outlet of the water pump is connected with the filter element to ensure that liquid water is fully filtered by a filter membrane in the post-treatment device and residual condensed water in the device is discharged. And the pipelines at the two sides of the post-processing device are all provided with VCR joints, so that the post-processing device is convenient to disassemble.
The high-concentration wastewater after the evaporation operation is finished is discharged through the wastewater treatment module, so that preparation is made for further harmless treatment. The wastewater treatment module consists of an external wastewater tank, an electromagnetic valve 2 and a pipeline. Solenoid valve 2 is located between evaporation zone and the external waste water tank, and through opening solenoid valve 2, the waste water in the device evaporation zone can be because self gravity and all flow into in the external waste water tank, opens the module of admitting air, and the residual waste water in the promotion device is discharged to the device internal blowing.
Whole operation process all can go on through manual and automatic two kinds of operation modes, is that the device can adjust according to actual sewage kind, has improved the adaptability of device to different operational environment. Meanwhile, in order to further improve the performance such as coordination, flexibility and the like among modules of the film evaporation tester and solve the problems of low manual operation efficiency, large human error and the like, an S7-200 SMART programmable PLC controller produced by Germany Siemens company is selected as a control system. The PLC controller is utilized to drive the solenoid valve to be switched on and off, and the characteristics of powerful functions, simplicity and easiness in programming, complete matching, stable performance, convenience in use and the like of the PLC are fully combined, so that flexible control over each evaporation stage is realized.
As an improvement, the seawater desalination device is arranged on a ship. The device can also utilize the flue gas waste heat on the ship boiler.
The flue gas is led out by a bypass of a main engine exhaust pipeline, and is blown into the water replenishing tank through the blower after being filtered, so as to heat hot water in the water replenishing tank.
Preferably, the system comprises a temperature equalizing device, wherein the temperature equalizing device is arranged on a pipeline for the flue gas to enter the water replenishing tank. The flue gas heats the water in the water replenishing tank through a plurality of heat exchange pipes arranged in the water replenishing tank. The temperature of water can be improved by preheating the water in the water replenishing tank in advance, so that the efficiency of seawater desalination is further improved.
Preferably, the flue gas is output from the flue gas duct through a plurality of nozzles, each nozzle being connected to a heat exchange tube.
As shown in FIG. 8, a temperature equalizing device is provided in the flue gas duct, wherein a flow guide plate 52 extending from the inner wall 51 of the flue gas duct to the center of the flue gas duct is provided in the flue gas duct, the flow guide plate 52 comprises a first curved wall 521 and a second curved wall 522 extending from the inner wall, wherein an acute angle formed by a tangent at the junction of the first curved wall 521 and the inner wall 51 and the inner wall is smaller than an acute angle formed by a tangent at the junction of the second curved wall 522 and the inner wall and is smaller than an acute angle formed by a tangent at the junction of the second curved wall 522 and the inner wall, the first curved wall 521 and the second curved wall 522 extend in a curved manner towards the flow direction of flue gas, and the intersection 523 of the first curved wall 521 and the second curved wall 522 is located downstream of the junction of the first curved wall 521 and the inner wall 51 and is located downstream of the junction of the second curved wall 522 and the inner wall. The shape of the flow guide plate 52 is the shape formed by the first 521 and second 522 curved walls and the inner wall rotated along the axis of the flue gas duct.
The flue gas can lead to the layering to appear the difference in temperature because different positions keep warm different and convection reason in the transmission course, especially to many mouthfuls of input flue gas, utilizes under the flue gas waste heat condition, leads to heat transfer inhomogeneous in the distiller, influences the heat transfer and the life-span of product. The invention provides a flue gas heat exchanger, which is characterized in that the flow guide plate is arranged in the flue gas pipeline, so that a part of flue gas flows along the flow guide plate and is guided to the opposite direction, and the flue gas is fully mixed with the flue gas entering from the opposite direction, thereby realizing uniform temperature of the flue gas, realizing the requirement of further heat exchange and prolonging the service life of products.
According to the invention, the drainage plate is respectively provided with the first bending wall and the second bending wall, and the two bending walls are arranged, so that the disturbance effect of smoke is better, the area of the drainage plate contacting the inner wall is increased, and the stability is improved. And through setting up the second crooked wall for flue gas that the opposite direction water conservancy diversion was come also can be along the crooked direction motion of second crooked wall direction, increases the buffering, reduces flow resistance.
Preferably, the first curved wall 521 and the second curved wall 522 are arcs, wherein the diameter of the arc of the first curved wall 521 is smaller than the diameter of the arc of the second curved wall 522.
According to the invention, the first wall and the second wall are arc-shaped, so that the smoke flowing resistance is smaller, and the smoke is easy to flow to the opposite side for mixing.
Preferably, the tangent to the first curved wall 521 at the location of the intersection 523 forms an angle of 30-60 °, preferably 45 °, with the axis of the flue gas duct. By providing this angle, fluid can be quickly directed to the opposite downstream location, and flow resistance can be further reduced.
Preferably, as shown in fig. 8, a plurality of layers of flow guide plates 52 are arranged on the inner wall of the flue gas pipeline along the flow direction of flue gas, and the flow guide plates of adjacent layers are distributed in a staggered mode. Through the staggered distribution of the drainage plates of the adjacent rows, the flue gas can fully move to the opposite position in the flue gas pipeline, and the full and uniform mixing is ensured. FIG. 3 shows one drainage plate for each layer. Of course, there may be more than one drainage plate per layer, for example, 3 drainage plates per layer.
Preferably, the distance between the intersection point and the inner wall of the flue gas duct is 0.3-0.5 times, preferably 0.4 times the diameter of the flue gas duct. With this arrangement, the air has less flow resistance on thorough mixing.
Preferably, the length of the first curved wall is greater than the length of the second curved wall.
Preferably, the total radian of the circular arcs connecting the drainage plates of the same layer with the inner wall is 150-180 degrees. This parameter set ensures thorough mixing while meeting the resistance requirements. For example, FIGS. 8, 10, and 12 show one for each layer of flow guide plates, with a total arc of 150-. Of course, multiple drainage plates can be arranged on each layer, for example, three drainage plates are arranged on each layer in the angle of 150 and 180 degrees in total in FIG. 8.
As preferablely, A layer drainage plate sets up the polylith, sets up the interval between the A drainage plate, and the equidistant setting of A drainage plate, B layer are the adjacent row on A layer, follow the direction of flow and observe, and B layer drainage plate sets up the interval position department on A layer. Through the complementation of the positions of the drainage plates of the adjacent layers, the smoke can fully move to the opposite position in the smoke pipeline, and the full and uniform mixing is ensured. It should be noted that the layer a and the layer B are not specifically and explicitly specified, and A, B is only used as a distinction and is used as an adjacent layer.
Preferably, along the flow direction of flue gas, flue gas pipeline inner wall sets up a plurality of flow deflectors, and along the flow direction of flue gas, the distribution density of flow deflector is littleer and more. Because the mixing degree of the flue gas is better and better along with the continuous movement of the flue gas, the distribution density is required to be set to be smaller and smaller so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.
Preferably, the distribution density of the flow guide plates is increased along the flowing direction of the smoke and along the flowing direction of the smoke. The effect is the result of a large number of numerical simulation and evaporation researches, and researches show that the law accords with the law of smoke movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, along the flow direction of flue gas, flue gas pipeline inner wall sets up a plurality of drainage plates, and along the flow direction of flue gas, the size of drainage plate is littleer and smaller. Because the mixing degree of the flue gas is better and better along with the continuous movement of the flue gas, the size is required to be set to be smaller and smaller so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.
As preferred, along the flow direction of flue gas, flue gas pipeline inner wall sets up a plurality of drainage plates, along the flow direction of flue gas, the range that the size of drainage plate is littleer and more constantly increases. The effect is the result of a large number of numerical simulation and evaporation researches, and researches show that the law accords with the law of smoke movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Through a large amount of numerical simulation and evaporation research discovery, the angle and the size of drainage plate have very big influence to heat transfer and misce bene, drainage plate and inner wall contained angle are on the small side, can lead to the mixed effect variation, and lead to the drainage plate oversize, influence the flow resistance, the contained angle is on the large side, lead to stirring fluid effect not good, the resistance grow, mixed effect variation, the interval of drainage plate is too big, can lead to the vortex effect not good, the interval undersize can lead to increasing the movement resistance, consequently this application has obtained nearest drainage plate structure size optimization relation through a large amount of data simulation and evaporation.
Preferably, the length L2 of the first line between the connection point of the first curved wall and the inner wall and the intersection point 523, the length L1 of the second line between the connection point of the second curved wall and the inner wall and the intersection point 523, the acute angle between the first line and the inner wall is a2, the acute angle between the second line and the inside is a1, the distance S between adjacent wedge-shaped structures in the flow direction of the flue gas, i.e. the distance between the center points of the adjacent flow guide plates on the inner wall, and the center point is the midpoint of the connection line between the connection points of the first curved wall, the second curved wall and the inner wall, satisfy the following requirements:
n-a-b ln (M), wherein N ═ L1+ L2)/S, M ═ sin (a2)/sin (a 1); ln is a function of the logarithm of the number,
0.263<a<0.264,0.0829<b<0.0831;
preferably, 0.25< M <0.75,0.28< N <0.35,45< a1<75 °, 15< a2<45 °;
the diameter D of the pipeline 5 is 5000-.
The optimal design requirements of the drainage plate structure can be met by the various types. The structural optimization formula is a main improvement point of the invention, is the most optimized formula researched by a large number of numerical simulations and evaporation, and is not common knowledge in the field.
More preferably, a is 0.2634 and b is 0.0830.
It is found in data simulation and evaporation that the interval between the drainage plate must be greater than certain distance, otherwise can lead to the fluid to guide to opposite direction through last drainage plate, but if the interval undersize between the drainage plate, can lead to the flue gas to flow opposite, still not fully filled with whole pipeline, set up the drainage plate this moment, play not mixed effect, the drainage plate only plays a baffling board effect, does not guide the effect of mixing, can only increase the flow resistance. Therefore, the design scheme of the minimum spacing of the drainage plate is provided through a great deal of research, and the design of the drainage plate has certain guiding significance.
The meeting point 523 is the perpendicular point on the inner wall, the line formed by the meeting point and the perpendicular point is the third line, the distance between the connecting point of the first bending wall and the inner wall and the perpendicular point is H, the acute angle formed by the first line and the third line is A3, the acute angle formed by the tangent line of the first bending wall at the meeting point position and the axis of the flue gas pipeline is a4, the inner pipe diameter of the flue gas pipeline is R, and the distance S is designed in the following mode:
(S/H)>a+b*Ln(T),(S/R)2>c+d*Ln(T);
wherein T ═ sin (A3)/sin (a4), 2.74< a <2.75,17.4< b <17.5, 1.998< c <1.999, 3.431< d <3.432, 30< A3<70 °, 20< a4<60 °; preferably 1.07< T < 1.30;
preferably, a is 2.743, b is 17.47, c is 1.9984, d is 0.4316;
according to the invention, through a large amount of evaporation and numerical simulation, the minimum design distance of the drainage plate is obtained, the resistance is reduced through the design distance, and meanwhile, the full mixing can be realized.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (4)

1. The utility model provides a solar energy sea water desalination device, includes film evaporation unit, automatic water supply unit, gas control unit and aftertreatment unit, the automatic water supply unit supplies the sea water to film evaporation unit, and evaporation produces vapor in film evaporation unit, vapor exports aftertreatment unit, gas control unit includes vacuum pump and air blower, switching between control system control vacuum pump and the air blower realizes the vacuum environment of sea water evaporation through the vacuum pump, then when the sea water desalination moves to needs and carries out the waste water of wasting discharge, air blower input air, outside waste water of discharging.
2. The apparatus of claim 1, wherein the thin film evaporation unit comprises a working area and a water replenishing area, the working area and the water replenishing area being communicated with each other through a pipe, and the water replenishing area replenishing water to the working area.
3. The apparatus of claim 1, wherein the water replenishment zone is at a height slightly above the evaporation zone.
4. The device as claimed in claim 1, wherein a valve for controlling the flow is connected to the pipeline from the water replenishing region to the evaporation region.
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CN101152964A (en) * 2006-09-27 2008-04-02 北京京鹏环球科技股份有限公司 Solar energy sea water desalinating warmhouse
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JP2015020163A (en) * 2013-07-19 2015-02-02 光弘 高橋 Nanofiber membrane distillation apparatus
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CN109809516A (en) * 2019-03-28 2019-05-28 北京理工大学 A kind of water-filling exhaust natural vacuum solar energy sea water desalination apparatus
CN110104716A (en) * 2019-05-10 2019-08-09 北京理工大学 A kind of two-tube opposed type solar energy sea water desalination apparatus based on membrane distillation
CN209689206U (en) * 2019-03-14 2019-11-26 山东大学 A kind of loop circuit heat pipe solar energy collector system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1600694A (en) * 2003-09-22 2005-03-30 田凤山 Energy saving spraying distillation type seawater desalination method under negative pressure and equipment
CN101152964A (en) * 2006-09-27 2008-04-02 北京京鹏环球科技股份有限公司 Solar energy sea water desalinating warmhouse
CN102959346A (en) * 2010-11-16 2013-03-06 扎黑德·胡赛恩·阿优伯 Thin film evaporator
CN202849107U (en) * 2012-10-20 2013-04-03 刘方旭 Water ring vacuum negative-pressure evaporation solar-powered seawater desalination device
JP2015020163A (en) * 2013-07-19 2015-02-02 光弘 高橋 Nanofiber membrane distillation apparatus
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