A seawater primary desalination system using green energy and construction waste

Abstract

The application belongs to the technical field of seawater desalination, and particularly relates to a seawater primary desalination system using green energy and construction waste, which comprises a seawater conveying pipe, an evaporation slope, a light-permeable fresh water collection plate obliquely arranged above the evaporation slope, and a flow divider; the flow divider comprises a plurality of slots; the seawater conveying pipe comprises a replaceable pipe with a seawater desalination filter core arranged inside; the seawater desalination filter core is formed by pressing construction waste powder; the water outlet end of the seawater conveying pipe is arranged at the upper portion of the evaporation slope; the lower surface of the fresh water collection plate is provided with a wavy flange for collecting fresh water and concentrating sunlight; the water outlet ends of the evaporation slope and the fresh water collection plate correspond to two slots of the flow divider respectively; the application has a simple structure, fully utilizes construction waste as a seawater desalination filter core, realizes the recycling of resources, collects rainwater, and improves the efficiency of solar seawater desalination.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of seawater desalination, and particularly relates to a seawater primary desalination system using green energy and construction waste. BACKGROUND

[0002] The shortage and uneven distribution of water resources can lead to overexploitation and pollution of water resources, which threatens the ecological environment. Through seawater desalination technology, the exploitation and pollution of freshwater resources can be reduced, and the ecological environment can be protected. Seawater desalination refers to the process of removing salt and impurities from seawater to obtain drinkable fresh water. The technologies of seawater desalination mainly include distillation method, reverse osmosis method, electrodialysis method, ion exchange method, etc. Among them, the distillation method has the advantages of simple operation, high reliability, stable desalination effect, and is suitable for small-scale fresh water demand areas such as islands and fishing villages. However, due to the need for a large amount of energy to heat seawater, the energy consumption is high, and the seawater desalination equipment and maintenance cost are also high, which requires a large amount of investment and maintenance cost. In addition, the distillation method also needs to handle a large amount of brine, and if it cannot be effectively treated and recycled, the precipitated salt will corrode and block the distillation equipment, reducing the efficiency of seawater desalination.

[0003] Construction waste refers to the waste generated in construction engineering, including construction waste, waste bricks, waste tiles, waste steel, waste wood, waste sand, etc. If the construction waste is not reasonably classified and recycled, many useful substances will be wasted, wasting valuable resources. Therefore, if the construction waste can be used for seawater desalination, it can certainly reduce the cost of seawater desalination equipment. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a seawater primary desalination system using green energy and construction waste, which uses construction waste as a seawater desalination filter core to realize resource recycling, and collects rainwater and improves the efficiency of solar seawater desalination.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] A seawater primary desalination system using green energy and construction waste, comprising a seawater conveying pipe, an evaporation slope, a light-transmissive fresh water collection plate obliquely arranged above the evaporation slope, and a flow divider; the flow divider comprises a plurality of slots;

[0007] The seawater conveying pipe comprises a replaceable pipe with a seawater desalination filter core inside; the seawater desalination filter core is formed by pressing construction waste powder;

[0008] The water outlet end of the seawater conveying pipe corresponds to the upper part of the evaporation slope, the upper surface of the evaporation slope is paved with a hydrophobic layer and an energy absorption layer, and the water outlet end of the evaporation slope is suspended on one slot of the flow distribution groove.

[0009] The lower surface of the fresh water collecting plate is provided with a wave flange for collecting fresh water and concentrating sunlight, the focal point position of the wave flange is the surface position of the evaporation slope, and the water outlet end of the fresh water collecting plate is suspended on the other slot of the flow distribution groove.

[0010] Further, the building waste powder used for preparing the seawater desalination filter core is one or more of waste concrete, waste gypsum, steel slag, fly ash, waste stone powder, waste wood, waste brick powder and waste glass powder with a particle size of less than 1 mm, and the required building waste powder is pressed in the replaceable pipe.

[0011] Further, the preparation method of the seawater desalination filter core is to fill the building waste powder in the replaceable pipe after adjusting the moisture content of the building waste powder to 40% to 60% by adding water, and to press the building waste powder into a core material at a static pressure of 10 MPa to 30 MPa.

[0012] Further, the upper surface of the evaporation slope is paved with a graphite layer as the hydrophobic layer and the energy absorption layer, and the thickness of the graphite layer is greater than 200 μm.

[0013] Further, the graphite layer is adhered to the surface of the evaporation slope by one or more of cement, vulcanized rubber, epoxy resin, polyurethane, polyurea and acrylic resin.

[0014] Further, the fresh water collecting plate and the wave flange are made of inorganic glass or organic glass with a light transmittance of more than 95%, the thickness of the fresh water collecting plate ranges from 5 mm to 100 mm, the maximum thickness of the wave flange ranges from 10 mm to 100 mm, and the wave flange on one fresh water collecting plate has 3 to 100 protrusions.

[0015] Further, the inclination angle of the fresh water collecting plate and the evaporation slope ranges from 2° to 10°, and the length of the fresh water collecting plate and the evaporation slope ranges from 2 meters to 5 meters.

[0016] Further, the upper surface of the evaporation slope is parallel to the fresh water collecting plate, and the spacing distance between the evaporation slope and the fresh water collecting plate is 20 mm to 100 mm.

[0017] Further, the water inlet end of the seawater conveying pipe is provided with a seawater pumping device, the seawater pumping device is a water pump powered by a permanent magnet wind power generator, and the permanent magnet wind power generator has an automatic wind adjustment function.

[0018] Further, the seawater conveying pipe is provided with a pipe mounting seat, axial two ends of the replaceable pipe are provided with flange mounting seats, the pipe mounting seat and the flange mounting seat are connected through fasteners, and the outer periphery of the pipe mounting seat and the flange mounting seat is provided with a handle.

[0019] The beneficial effects of the present application are:

[0020] The seawater desalination filter element made of construction waste filters seawater through the construction waste layer, removes impurities and particulate matters and most of chlorine ions and sodium ions in seawater, reduces the cost burden of seawater desalination equipment, improves the efficiency and economy of seawater desalination, helps to reduce environmental pressure, and realizes resource recycling;

[0021] The evaporation slope surface is provided with a hydrophobic layer and an energy absorption layer, the hydrophobic layer can eliminate the long-term adhesion of precipitated salt and has the effect of surface self-cleaning, the energy absorption layer can absorb a large amount of solar heat energy and increase the seawater evaporation efficiency, the wave flange can gather sunlight and evaporated fresh water, the sunlight can accelerate heat energy enrichment in winter and avoid local icing, and at the same time, after seawater evaporation, the condensed water can flow along the shape of the wave flange to the bottom of the convex part of the wave flange, and the efficiency of collecting fresh water from the fresh water collection plate is improved.

[0022] The fresh water collection plate is set outdoors, the diversion groove can not only realize the diversion of once desalinated water and twice desalinated water, but also can gather rainwater and other natural fresh water in the desalinated water to maximize the green desalinated water collection efficiency.

[0023] In summary, the seawater is desalinated twice by the seawater desalination filter element and solar distillation, green energy such as tidal energy, wind energy and solar energy is used as the energy of seawater desalination, construction waste is used as the seawater desalination filter element to realize resource recycling, rainwater is collected and the efficiency of solar seawater desalination is improved, and the structure is simple, the cost and maintenance burden of seawater desalination equipment are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the application, and together with the description of the application provided below, explain the application.

[0025] Figure 1 The structural schematic diagram of the embodiment of the present application.

[0026] Figure 2 The end surface schematic diagram of the wave flange of the embodiment of the present application.

[0027] Figure 3 Fig. 1 is a schematic view of the installation structure of the replaceable tube of the embodiment of the present application.

[0028] In the figure, 1-seawater pumping device, 2-seawater delivery pipe, 3-sea embankment, 4-seawater desalination filter core, 5-sprinkling port, 6-freshwater collection plate, 7-evaporation slope, 8-diversion groove, 81-first slot, 82-second slot, 9-wave flange, 10-blade, 11-handle, 12-upper pipe sleeve, 13-replaceable tube, 14-lower pipe sleeve, 15-tube clamping protruding ring, 16-bolt fastening port. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application belong to the scope of protection of the present application.

[0030] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and are not required to be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "connected", "connected" used in the present application should be understood broadly, for example, can be fixed connection, can also be detachable connection; can be directly connected, can also be indirectly connected through intermediate components. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] As shown in Figures 1-3 A seawater primary desalination system utilizing green energy and construction waste, comprising a seawater delivery pipe 2 erected on a sea embankment 3, an evaporation slope 7, a light-transmissive freshwater collection plate 6 obliquely erected above the evaporation slope 7, and a diversion groove 8; the diversion groove 8 at least comprises a first slot 81 and a second slot 82 arranged side by side, the first slot 81 is used for guiding the seawater flowing down the evaporation slope 7, and the second slot 82 is used for guiding the freshwater flowing down the wave flange 9;

[0033] The seawater delivery pipe 2 includes a replaceable pipe 13 with a seawater desalination filter element 4 inside; the seawater delivery pipe 2 is a seawater corrosion resistant metal pipe, and the seawater desalination filter element 4 is formed by pressing construction waste powder; the seawater desalination filter element 4 can remove suspended solids, particulate matter, organic matter and other substances in seawater, thereby improving the purification effect of seawater; the use of seawater desalination filter element 4 made of construction waste improves the efficiency and economy of seawater desalination, and also helps to reduce environmental pressure and realize the recycling of resources;

[0034] The seawater conveying pipe 2 is equipped with a seawater pumping device 1 at its inlet end. The seawater pumping device 1 is a water pump powered by a permanent magnet wind turbine. The permanent magnet wind turbine has an automatic wind-adjusting function. The seawater pumping device 1 is powered by the blades 10 of the permanent magnet wind turbine driven by sea tides, wind energy, etc., to pump seawater into the seawater conveying pipe 2.

[0035] The seawater conveying pipe 2 is equipped with a spray nozzle 5 at its outlet end, which is located on the upper part of the evaporation slope 7. The primary seawater desalination water is evenly sprayed onto the upper surface of the evaporation slope 7 through the spray nozzle 5. The upper surface of the evaporation slope 7 is covered with a hydrophobic layer and an energy-absorbing layer. The outlet end of the evaporation slope 7 is suspended above the first slot 81 of the diversion channel 8. The seawater filtered by the seawater desalination filter element 4 is the primary seawater desalination water. The primary seawater desalination water flowing down the evaporation slope 7 flows into the first slot 81 of the diversion channel 8 for collection.

[0036] The lower surface of the freshwater collection plate 6 is provided with a wavy flange 9 for collecting freshwater and sunlight. The focal point of the wavy flange 9 is located at the surface of the evaporation slope 7, so that sunlight passes through the freshwater collection plate 6 and converges at the surface of the evaporation slope 7, making full use of solar energy to accelerate the accumulation of heat energy on the surface of the evaporation slope 7. The water outlet of the freshwater collection plate 6 is suspended on the second slot 82. The water condensed after the primary seawater desalination water evaporates is secondary seawater desalination water. The secondary seawater desalination water and the rainwater collected by the freshwater collection plate 6 flow into the second slot 82 for collection, thereby maximizing the green desalination water collection efficiency.

[0037] Both the freshwater collection plate 6 and the corrugated flange 9 have the ability to transmit sunlight. The corrugated flange 9 has the ability to collect both sunlight and evaporated freshwater. The collected sunlight can accelerate the accumulation of heat energy in winter and prevent local freezing. At the same time, the corrugated flange 9 can improve the efficiency of the desalinated seawater collected at the bottom of the freshwater collection plate 6.

[0038] The construction waste powder used in the preparation of the seawater desalination filter element 4 is one or more of the following: waste concrete, waste gypsum, steel slag, fly ash, waste stone powder, waste wood, waste brick powder, slag, waste sand and gravel, and waste glass powder, with a particle size of less than 1 mm. The required construction waste powder is pressed in the replaceable tube 13. Utilizing construction waste for seawater desalination is an emerging sustainable development approach that can simultaneously solve the problems of construction waste treatment and seawater desalination. Construction waste contains a large amount of gravel, sand, steel slag, gypsum, etc., which can be used as filter materials. Some materials in construction waste, such as concrete, wood, and bricks, have adsorption capacity and can be used to adsorb salt and impurities in seawater, thereby achieving seawater desalination.

[0039] The seawater desalination filter element 4 is prepared by adding water to the construction waste powder to adjust the moisture content to 40%–60%, filling it into a replaceable tube 13, and pressing it into a core material under a static pressure of 10 MPa–30 MPa. The seawater desalination filter element 4 is typically made of multiple materials, including both construction waste as adsorbent material and construction waste as filter material. In one specific embodiment, the seawater desalination filter element 4 is made of waste concrete, waste gypsum, and steel slag. The raw materials are adjusted to a moisture content of 40% and filled into a replaceable metal tube, then pressed into a core material under a static pressure of 10 MPa. In another specific embodiment, the seawater desalination filter element 4 is made of waste concrete, waste brick powder, and waste glass powder. The raw materials are adjusted to a moisture content of 60% and filled into a replaceable metal tube, then pressed into a core material under a static pressure of 30 MPa. In another specific embodiment, the seawater desalination filter element 4 is made of waste concrete, waste gypsum, steel slag, fly ash, waste stone powder, and waste wood. The raw materials are adjusted to a moisture content of 50% and filled into a replaceable metal tube and pressed into a core material at a static pressure of 20 MPa in one step.

[0040] like Figure 1 As shown, the upper surface of the evaporation slope 7 is covered with a graphite layer as both a hydrophobic layer and an energy-absorbing layer. Graphite is inexpensive, which helps reduce equipment costs. The hydrophobic layer prevents long-term adhesion of precipitated salts, providing a self-cleaning effect. The energy-absorbing layer absorbs a large amount of solar thermal energy, increasing seawater evaporation efficiency. The graphite layer is thicker than 200 μm and is adhered to the surface of the evaporation slope 7 using one or more of the following: cement, vulcanized rubber, epoxy resin, polyurethane, polyurea, and acrylic resin. In one specific embodiment, the graphite layer is adhered to the surface of the evaporation slope 7 using cement. In another specific embodiment, the graphite layer is adhered to the upper surface of the evaporation slope 7 using vulcanized rubber or epoxy resin. In yet another specific embodiment, the graphite layer is adhered to the upper surface of the evaporation slope 7 using polyurethane, polyurea, or acrylic resin.

[0041] likeFigure 1 , Figure 2 As shown, the freshwater collection plate 6 and the corrugated flange 9 are made of inorganic glass or organic glass with a light transmittance of 95% or more. The thickness of the freshwater collection plate 6 ranges from 5mm to 100mm, and the maximum thickness of the corrugated flange 9 is 10mm to 100mm. The corrugated flange 9 on a freshwater collection plate 6 has 3 to 100 protrusions.

[0042] like Figure 1 , Figure 2 As shown, the inclination angles of the freshwater collection plate 6 and the evaporation slope 7 are both in the range of 2° to 10°, and the lengths are both in the range of 2 meters to 5 meters. Preferably, the upper surface of the evaporation slope 7 is parallel to the freshwater collection plate 6, and the distance between the evaporation slope 7 and the freshwater collection plate 6 is 20 mm to 100 mm. In one specific embodiment, the inclination angles of the evaporation slope 7 and the freshwater collection plate 6 are both 2°, and the length is 2 meters, with a distance of 20 centimeters between them. In another specific embodiment, the inclination angles of the evaporation slope 7 and the freshwater collection plate 6 are both 10°, and the length is 5 meters, with a distance of 10 centimeters between them. In yet another specific embodiment, the inclination angles of the evaporation slope 7 and the freshwater collection plate 6 are both 5°, and the length is 4 meters, with a distance of 7 centimeters between them.

[0043] like Figure 3 As shown, the seawater conveying pipe 2 is provided with a pipe mounting seat. The seawater conveying pipe 2 has a middle port for installing the replaceable pipe 13. The pipe mounting seat includes an upper pipe sleeve 12 and a lower pipe sleeve 14 installed at the middle port of the seawater conveying pipe 2. The inner walls of the upper pipe sleeve 12 and the lower pipe sleeve 14 are provided with pipe clamping protrusions 15 for fixing the pipe head at the middle port. Flange mounting seats are provided at both ends of the replaceable pipe 13. The upper pipe sleeve 12, the lower pipe sleeve 14 and the flange mounting seats are respectively provided with bolt fastening ports 16. The pipe mounting seat and the flange mounting seat are connected by fasteners. The outer periphery of the pipe mounting seat and the flange mounting seat are provided with handles 11 for centering adjustment. After the replaceable pipe 13 is installed, the handles 11 of the pipe mounting seat are aligned with the handles 11 of the flange mounting seat.

[0044] In actual use, the evaporation ramp 7 can be widened or set up side by side according to the site size. Baffles need to be installed on both sides of the outermost edge of all evaporation ramps.

[0045] This invention desalinates seawater twice through a seawater desalination filter and solar distillation. It utilizes green energy sources such as tidal energy, wind energy, and solar energy as the energy source for seawater desalination, and makes full use of construction waste as the seawater desalination filter to achieve resource recycling. At the same time, it collects rainwater and improves the efficiency of solar seawater desalination. Moreover, the structure is simple, reducing the cost and maintenance burden of seawater desalination equipment.

[0046] It is understood that the above description is merely exemplary and the embodiments of this application are not intended to limit the scope of the invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A system for primary desalination of seawater using green energy and construction waste, characterized in that: It comprises a seawater delivery pipe (2) erected on a coastal embankment (3), an evaporation slope (7), a light-permeable freshwater collection plate (6) obliquely erected above the evaporation slope (7), and a flow divider (8); the flow divider (8) comprises a plurality of slots; The seawater delivery pipe (2) comprises a replaceable pipe (13) with a seawater desalination filter core (4) inside; the seawater desalination filter core (4) is formed by pressing building waste powder; the building waste powder used for preparing the seawater desalination filter core (4) is one or more of waste concrete, waste gypsum, steel slag, fly ash, waste stone powder, waste wood, waste brick powder, and waste glass powder, with a particle size less than 1 mm; the seawater desalination filter core (4) is prepared by filling the building waste powder into the replaceable pipe (13) after adjusting the moisture content to 40%-60% with water, and then pressing the core material once at a static pressure of 10 MPa-30 MPa; The seawater delivery pipe (2) is provided with a pipe mounting seat, and the seawater delivery pipe (2) is provided with a middle port for installing the replaceable pipe (13); the pipe mounting seat comprises an upper pipe sleeve (12) and a lower pipe sleeve (14) mounted in the middle port of the seawater delivery pipe (2); the inner walls of the upper pipe sleeve (12) and the lower pipe sleeve (14) are provided with pipe clamping convex rings (15) for fixing the pipe heads at the middle port; the replaceable pipe (13) is provided with flange mounting seats at the axial ends thereof; the upper pipe sleeve (12), the lower pipe sleeve (14), and the flange mounting seats are respectively provided with bolt fastening ports (16); the pipe mounting seat and the flange mounting seat are connected through fasteners; the outer peripheries of the pipe mounting seat and the flange mounting seat are both provided with handles (11) for centering adjustment; after the replaceable pipe (13) is installed, the handles (11) of the pipe mounting seat are aligned with the handles (11) of the flange mounting seat; The water outlet end of the seawater delivery pipe (2) is arranged corresponding to the upper part of the evaporation slope (7); the upper surface of the evaporation slope (7) is paved with a graphite layer as a hydrophobic layer and an energy absorption layer; the water outlet end of the evaporation slope (7) is suspended over one slot of the flow divider (8); the thickness of the graphite layer is greater than 200 μm; The lower surface of the freshwater collection plate (6) is provided with a wave flange (9) for collecting freshwater and concentrating sunlight; the focal point position of the wave flange (9) is the surface position of the evaporation slope (7); the freshwater collection plate (6) and the wave flange (9) are made of inorganic glass or organic glass with a light transmittance of more than 95%; the thickness of the freshwater collection plate (6) ranges from 5 mm to 100 mm; the maximum thickness of the wave flange (9) ranges from 10 mm to 100 mm; the wave flange (9) on one freshwater collection plate (6) has 3-100 convex parts; the water outlet end of the freshwater collection plate (6) is suspended over another slot of the flow divider (8).

2. The system for seawater primary desalination using green energy and construction waste according to claim 1, characterized in that: The graphite layer is adhered to the surface of the evaporation slope (7) through one or more of cement, vulcanized rubber, epoxy resin, polyurethane, polyurea, and acrylic resin.

3. The system for seawater primary desalination using green energy and construction waste according to claim 1, characterized in that: The inclination angle of the fresh water supplement plate (6) and the evaporation slope (7) ranges from 2° to 10°, and the length ranges from 2 meters to 5 meters.

4. The system for seawater primary desalination using green energy and construction waste according to claim 3, characterized in that: The upper surface of the evaporation slope (7) is parallel to the fresh water supplement plate (6), and the interval distance between the evaporation slope (7) and the fresh water supplement plate (6) ranges from 20 mm to 100 mm.

5. The system for seawater primary desalination using green energy and construction waste according to claim 1, characterized in that: The water inlet end of the seawater conveying pipe (2) is provided with a seawater pumping device (1), the seawater pumping device (1) is a water pump powered by a permanent magnet wind driven generator, and the permanent magnet wind driven generator has an automatic windward adjustment function.

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