Light-wind-heat multi-energy coupling evaporation strong brine desalting device

Abstract

The utility model relates to the field of brine concentration and salt extraction, in particular to a light-wind-heat multi-energy coupling evaporation strong brine desalting device which comprises a brine tank and an evaporation unit above the brine tank, and the evaporation unit is supported by a frame composed of a support, a top rolling shaft and a bottom rolling shaft. A motor and a sensor are installed on the top rolling shaft. The rotating speed of the motor is controlled by the sensor to drive the top roller to rotate. The top roller drives the fiber evaporation rope to rotate and further drives the bottom roller to rotate. The bottom roller is immersed in the brine tank, continuously supplies water upwards, and evaporates under the driving of solar energy, wind energy and environmental heat energy, so that brine in the brine tank is continuously concentrated until saturated and separated out, and brine concentration and salt extraction are realized. The device has the characteristics of simple structure, energy conservation, environmental protection and low cost, and can be applied to the fields of seawater and salt lake salt extraction, chemical high-salt wastewater desalination and the like.

Description

Technical Field

[0001] The utility model relates to the field of brine concentration and salt extraction, in particular to a concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation. Background Art

[0002] Brine salt extraction technology has important applications in production and life. There are two types of traditional brine salt extraction technologies: one is thermal evaporation treatment, such as traditional seawater and salt lake salting processes, and triple-effect evaporation technology; the other is membrane treatment, such as reverse osmosis membrane desalination and nanofiltration membrane technology. Both methods are relatively mature large-scale, intensive desalination solutions, but are also restricted by the following factors: First, they require the consumption of large amounts of high-quality energy such as fossil fuels and electricity, thereby exacerbating the greenhouse effect and environmental pollution, and are highly dependent on large-scale processing equipment, with production capacity and distribution locations limited; second, these brine salt extraction methods have the potential risk of causing certain ecological pollution, and the equipment maintenance technology requirements and costs are high. These factors have led to these traditional desalination technologies being generally applied to large-scale, centralized scenarios, and unable to meet the needs of small-scale or diversified scenarios.

[0003] To reduce energy consumption, the use of renewable energy sources such as solar and wind power to extract salt from brine has become a focus of attention in the energy, environmental, and water resource sectors. With its advantages of not consuming conventional energy and producing zero carbon emissions, the process has become a focal point for attention in the energy, environmental, and water resource sectors. In traditional solar salt production, heat raises the overall water temperature, while steam is generated only at the water surface, resulting in significant heat loss and low solar energy utilization efficiency.

[0004] In recent years, solar-driven interfacial evaporation technology, which generates steam through localized solar interfacial heating, has been developed. This technology isolates a small amount of water from the underlying water body, confining the conversion of solar energy to heat at the air-isolated water interface. This heats and evaporates only the water at this interface, significantly reducing heat loss. This allows for easy achievement of photothermal-steam conversion efficiencies exceeding 80%, significantly increasing the rate of water-salt separation. Furthermore, the market for extracting salt from salt lakes and high-salt chemical wastewater in my country is generally located in the arid northwest region with abundant wind energy resources, while the market for extracting salt from seawater is generally located in coastal areas with abundant wind energy resources. Therefore, combining solar interfacial evaporation with wind interfacial evaporation is undoubtedly an ideal approach to improve overall energy utilization for water-salt separation.

[0005] However, current research on interfacial evaporation technology is still at the laboratory stage, especially the utilization of wind energy is still a blank area. Summary of the Invention

[0006] The purpose of the utility model is to provide a concentrated brine desalination device with light-wind-heat multi-energy coupled evaporation, which has a simple structure, energy saving and environmental protection, low cost, and wide application scenarios.

[0007] To achieve the above-mentioned purpose, the utility model includes a brine tank and an evaporation unit arranged above the brine tank. The evaporation unit includes a bracket and a top roller and a bottom roller respectively arranged on the top and bottom of the bracket, which are rotatable and wrapped with hydrophilic and light-absorbing fabrics. The bottom roller is immersed in the brine tank, and a motor for driving the roller to rotate is also installed on the bracket. A fiber evaporation rope is installed between the top roller and the bottom roller.

[0008] The top and bottom of the bracket are respectively installed with a top roller and a bottom roller, and the top roller and the bottom roller are respectively arranged on the top roller and the bottom roller.

[0009] The brine tank, bracket, top roller and bottom roller are all made of corrosion-resistant materials.

[0010] The fiber evaporation rope is made of hydrophilic and light-absorbing material.

[0011] The motor is mounted on the top roller, and a sensor for controlling the motor speed is also mounted on the top roller.

[0012] The beneficial effects of the present invention are:

[0013] 1. Compared with the three-effect thermal evaporation technology and membrane filtration technology that are currently the mainstream in the desalination field, the utility model only needs to use renewable energy such as solar energy, wind energy, and ambient thermal energy for evaporation desalination, thus getting rid of the dependence on large-scale energy facilities, reducing energy consumption costs and carbon emissions, reducing the cost of replacing wearing parts, expanding the scope of application of brine salt extraction, and improving energy utilization efficiency. It is not only suitable for large-scale, centralized water supply systems, but also suitable for small, portable devices.

[0014] 2. Compared with the solar interface evaporation technology that is currently a hot topic in academia, this utility model designs a rolling vertical evaporation device that combines solar energy, wind energy, and ambient thermal energy to jointly drive the evaporation of interface water. The thickness, thickness, and arrangement density of the fiber evaporation rope in the main evaporation area can be adjusted according to the contribution of solar energy and wind energy to evaporation, so that the evaporation rate of the evaporation surface in contact with light and wind reaches the optimal level, thereby achieving efficient desalination of concentrated brine.

[0015] 3. This device is equipped with sensors that monitor sunlight intensity and wind speed in real time, and accurately feedback and control the rotation rate of the entire evaporation system so that the rotation speed and evaporation rate match in real time, greatly reducing heat loss.

[0016] 4. Compared with the conventional solution of evaporating brine and then separating and collecting salt crystals, this device repeatedly evaporates and concentrates the brine in the brine tank by continuously supplying water for evaporation until crystals precipitate in the brine tank. There is no need to set up additional salt crystallization sites and perform stripping, which simplifies the device structure and maintenance costs, avoids the generation of higher salinity wastewater, and facilitates the collection of salt crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 1 In the figure, 1- brine tank, 2- bottom roller, 3- top roller, 4- fiber evaporation rope, 5- bracket, 6- top roller, 7- bottom roller, 8- motor, 9- sensor. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings.

[0020] See also Figure 1 The present invention includes a brine tank 1 and an evaporation unit arranged above the brine tank, the evaporation unit includes a bracket 5 and a top roller 6 and a bottom roller 7 respectively arranged on the top and bottom of the bracket 5, a top roller 3 and a bottom roller 2 wrapped with hydrophilic and light-absorbing fabric are respectively installed on the top roller 6 and the bottom roller 7, the bottom roller 2 is immersed in the brine tank 1, and a motor 8 for driving the top roller 3 to rotate and a sensor 9 for controlling the motor speed are also installed on the top roller 6, a fiber evaporation rope 4 made of hydrophilic and light-absorbing material is installed between the top roller 3 and the bottom roller 2, and the brine tank 1, bracket 5, top roller 6 and bottom roller 7 of the present invention are all made of corrosion-resistant materials.

[0021] The brine tank 1 is made of corrosion-resistant plastic and is placed on the ground, with the evaporation unit placed directly above it. The bracket 5, top roller 6, and bottom roller 7 of the evaporation unit are all made of corrosion-resistant aluminum alloy. The motor 8 is controlled by the sensor 9 to drive the top roller 3 to rotate. The speed is fast when the light is strong and the wind speed is high, and the speed is slow when it is low. The fiber evaporation rope 4 drives the top roller 3 and the bottom roller 2 to rotate. The bottom roller 2 is immersed in the brine tank 1, absorbs brine, and continuously supplies water upward for evaporation, continuously supplying water to the fiber evaporation rope 4 and the top roller (3). During the day, it evaporates under the action of sunlight, wind, and environmental heat energy, and at night, it evaporates under the action of wind, and brings the concentrated brine back to the brine tank 1, causing the brine in the brine tank 1 to continue to concentrate until saturation and precipitation, and at the same time, salt solids continue to precipitate on the surface of the fiber evaporation rope 4 and the top roller 3.

[0022] The utility model adopts a rolling vertical evaporation device, which combines solar energy, wind energy and environmental thermal energy to jointly drive the evaporation of interface water, thereby achieving efficient desalination of concentrated brine. It will play an important role in the fields of seawater and salt lake salt extraction, chemical high-salt wastewater desalination, etc.

Claims

1. A concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation, characterized by: The invention comprises a salt water tank (1) and an evaporation unit arranged above the salt water tank, wherein the evaporation unit comprises a bracket (5) and a top roller (3) and a bottom roller (2) respectively arranged on the top and bottom of the bracket (5) and rotatable and wrapped with hydrophilic and light-absorbing fabrics. The bottom roller (2) is immersed in the salt water tank (1), and a motor (8) for driving the roller to rotate is also installed on the bracket (5). A fiber evaporation rope (4) is installed between the top roller (3) and the bottom roller (2).

2. The concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation according to claim 1 is characterized in that: A top roller (6) and a bottom roller (7) are respectively installed on the top and bottom of the bracket (5), and the top roller (3) and the bottom roller (2) are respectively arranged on the top roller (6) and the bottom roller (7).

3. The concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation according to claim 1 is characterized in that: The brine tank (1), bracket (5), top roller (6) and bottom roller (7) are all made of corrosion-resistant materials.

4. The concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation according to claim 1 is characterized in that: The fiber evaporation rope (4) is made of hydrophilic and light-absorbing material.

5. The concentrated brine desalination device using light-wind-heat multi-energy coupled evaporation according to claim 2 is characterized in that: The motor (8) is mounted on the top roller (6), and a sensor (9) for controlling the motor speed is also mounted on the top roller (6).

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