A conveyor belt-type salt-resistant crystallization cylindrical distillation system

Abstract

The present invention discloses a conveyor belt type salt-resistant crystallization cylindrical distillation system, wherein a seawater tank and a freshwater collection tank of a circular arc cylindrical structure concentric therewith are arranged in the cylindrical glass body; the conveyor belt evaporation system comprises a composite conveyor belt evaporation surface sleeved on a rolling bearing column, an inner water absorption layer, and an outer photothermal layer; the rolling bearing column is connected to a buoy through an inclined connecting rod, and a micro motor for driving the rolling bearing column is arranged in the buoy; the solar photovoltaic panel is connected to an efficient lithium polymer battery pack connected to the micro motor through a flexible cable through a power supply control circuit; the water level control circuit is connected to a pump machine to ensure that the lower side of the composite conveyor belt evaporation surface is completely immersed in the main seawater in the seawater tank, while the upper side is always exposed to the liquid surface, and the concentrated brine on the evaporation surface is mixed with the main seawater through mechanical transmission to prevent salt crystallization. The present invention is durable, not easily affected by the environment, has efficient evaporation, efficient salt resistance, high stability, convenient fresh water collection, and energy saving.

Description

Technical Field

[0001] The invention relates to the technical field of seawater desalination, and in particular to a conveyor belt type salt-resistant crystallization cylindrical distillation system. Background Art

[0002] Traditional desalination methods mainly include multi-stage flash evaporation, multi-stage reverse osmosis and multi-stage evaporation, but these methods have some problems, such as high energy consumption, complex equipment and high cost. With the development of science and technology, solar energy is increasingly used in desalination. The use of solar energy for desalination mainly utilizes the thermal effect and light effect of solar energy. The light effect of solar energy is to use photovoltaic equipment to convert photoelectricity and then use the electricity converted from clean energy to supply traditional desalination equipment, such as pressurized reverse osmosis membrane operation to complete the desalination process; while the thermal effect of solar energy is to directly use the heat energy generated by the medium material absorbing sunlight to drive the seawater to be desalinated to complete the gas-liquid phase change, and then collect the steam generated by the phase change to condense it into fresh water to complete the desalination process.

[0003] The solar seawater distiller using porous blackbody material as the core has many advantages such as economic efficiency, energy saving, easy use, simple structure and easy maintenance. However, as the interface evaporation proceeds, the seawater is vaporized by heat and becomes water vapor and leaves the evaporation component. However, the departure of water vapor will cause salt to accumulate on the surface of the evaporator, blocking the steam evaporation and the transportation channel for replenishing the water to be evaporated, so that the water cannot be effectively transported to the evaporation surface. At the same time, the salt crystals accumulated on the surface of the evaporator will also reduce the effective illumination area, greatly reducing the photothermal conversion efficiency of the photothermal conversion material.

[0004] Currently, there are usually three methods to solve the problem of salt crystallization. The first is to change the wettability of the surface of the photothermal layer to make it hydrophobic so that seawater cannot reach the surface of the photothermal layer, thereby eliminating the problem of salt accumulation in the photothermal layer. However, this method cannot improve the salt accumulation problem in the insulation layer or the water transfer layer, and the evaporation temperature is low, which reduces the evaporation efficiency; the second method is to change the structure of the porous distiller, such as introducing a pore structure or a layered structure to enhance the mass transfer of salt, but this method has poor salt resistance at a higher evaporation rate; the third method is to limit crystallization to a specific area through a special design of the evaporator shape, such as the most common conical evaporator, which can concentrate the salt on the outer edge for crystallization, and then use gravity to let the salt fall by itself, but this method cannot guarantee long-term salt resistance and has poor stability. Summary of the invention

[0005] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a conveyor belt type salt-resistant crystallization cylindrical distillation system.

[0006] The technical solution provided by the present invention is as follows: a conveyor belt type salt-resistant crystallization cylindrical distillation system, characterized in that it includes a cylindrical glass body, a seawater tank is arranged inside the cylindrical glass body, the seawater tank is a circular arc cylindrical structure concentric with the cylindrical glass body, and a fresh water collection tank is formed between the seawater tank and the cylindrical glass body; the fresh water collection tank is connected to a guide pipe, and the seawater tank is connected to a water inlet pipe provided with a pump, the side of the cylindrical glass body is connected to a hollow aluminum bracket, the seawater tank in the cylindrical glass body is always placed in the forward direction, and a conveyor belt evaporation system is arranged on the seawater tank; the conveyor belt evaporation system includes a composite conveyor belt evaporation surface, the composite conveyor belt evaporation surface adopts a double-layer composite closed belt structure, and the two ends are sleeved on two rolling bearing columns, and the water absorption layer of the composite conveyor belt close to the rolling bearing column is coated with a light thermal layer; the rotation of the rolling bearing column drives the evaporation surface of the composite conveyor belt to move, the outer sides of the two rolling bearing columns are connected to a buoy through a connecting rod, the upper end of the connecting rod is inclined outwardly to connect the buoy, and the lower end is inclined inwardly to connect the rolling bearing column, and the buoy is equipped with a micro motor for driving the rolling bearing column; the two end faces of the cylindrical glass body are respectively connected to two symmetrical solar photovoltaic panels, each of which is connected to a power supply control circuit, which is connected to a high-efficiency lithium polymer battery pack, and the high-efficiency lithium polymer battery pack is respectively connected to the micro motor built into the buoy through a flexible cable; the cylindrical glass body is connected to a water level control circuit, which is connected to a pump to ensure that the lower side of the evaporation surface of the composite conveyor belt is completely immersed in the main seawater in the seawater tank, while the upper side is always exposed to the liquid surface.

[0007] Furthermore, the water absorbing layer is made of one of hydrophilic hydrogel, non-woven fabric, and cellulose paper, and the photothermal layer is made of gold nanoparticles or graphene mixed hydrogel.

[0008] Furthermore, the seawater tank is a four-sevenths arc cylindrical structure.

[0009] The beneficial effects of the present invention are as follows: due to the widespread existence of salt precipitation and the micro-nano porous structure characteristics of the evaporator itself, the common salt resistance method - passive salt resistance has limited effect and cannot produce obvious long-term improvement. The present invention adopts the strategy of active salt resistance, using external power to dissolve salt crystals, which is more efficient than the existing technology, and is durable, not easily affected by the environment, and has high stability.

[0010] In the conveyor belt evaporation system provided by the present invention, a composite conveyor belt evaporation surface of a double-layer composite closed belt structure and two rolling bearing columns are combined. The composite conveyor belt evaporation surface is sleeved on the two rolling bearing columns, and the salt crystals gradually precipitated above the liquid surface as the gas-liquid interface evaporates are transferred to below the liquid surface along the composite conveyor belt evaporation surface, and the crystallized salt is gradually dissolved, that is, the salt crystals precipitated on the evaporation side are transferred to the seawater for dissolution, so that the evaporation side always maintains a state of less crystallized salt, thereby evaporating efficiently, achieving the purpose of resisting salt crystallization, and making the system evaporate efficiently. The water-absorbing layer close to the rolling bearing column adopts a flexible water-absorbing and heat-insulating material, which plays a role in heat storage while providing sufficient friction. The outer side of the water-absorbing layer is covered with a layer of photothermal porous material to form an outer photothermal layer, which completes efficient photothermal conversion while fully utilizing the capillary effect to absorb water.

[0011] The power and power structure of the present invention is relatively ingenious, including solar photovoltaic panels, power supply control circuits, water level control circuits, high-efficiency lithium polymer battery packs, etc. A float specifically providing buoyancy is arranged on the outside of the rolling bearing columns at both ends of the evaporation surface of the composite conveyor belt, which not only ensures that one side of the evaporation surface is always above the liquid level, but also places a micro motor inside, drives the rolling bearing column through a gear connecting rod transmission, so that the two rolling bearing columns rotate synchronously with the built-in micro motor. In this way, the float not only serves as a buoyancy component, but also serves as a power source for the conveyor belt evaporation system. In addition, by adopting solar photovoltaic panels, power supply control circuits, high-efficiency lithium polymer battery pack control circuits and maintaining power supply, it is possible to effectively prevent the system from idling due to the external energy drive motor under the influence of lighting conditions, thereby saving energy.

[0012] The present invention arranges a concentric cylindrical structure made of a whole piece of glass material, wherein the inner layer is arranged in a four-sevenths arc cylinder as a seawater tank, which can prevent seawater from overflowing, and the outer cylindrical glass body is a standard cylindrical glass shell, which functions to evaporate the seawater through sunlight and at the same time make the evaporated seawater vapor gather along the outer wall of the cylinder to the freshwater collection tank, and the cylindrical structure is convenient for the arrangement of the seawater tank and the setting of the freshwater collection tank, which can be highly intensive and convenient for freshwater collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 is a cross-sectional view of the present invention;

[0015] Figure 3 It is a structural schematic diagram of the conveyor belt evaporation system of the present invention;

[0016] Figure 4 It is a schematic diagram of the structure of the electric power and power structure part of the present invention;

[0017] Figure 5It is a schematic structural diagram of the solar power supply part of the present invention;

[0018] Figure 6 It is a structural schematic diagram of the water level control part of the present invention;

[0019] Figure 7 It is a schematic structural diagram of the seawater tank and the freshwater collection tank of the present invention.

[0020] In the figure, 1 is a float, 2 is a composite conveyor belt evaporation surface, 3 is a rolling bearing column, 4 is a solar photovoltaic panel, 5 is a pump, 6 is a water inlet pipe, 7 is a guide pipe, 8 is a hollow aluminum bracket, 9 is a cylindrical glass body, 10 is a flexible cable, 11 is a water level control circuit, 12 is a high-efficiency lithium polymer battery pack, 13 is a power supply control circuit, 14 is a sea water tank, 15 is a fresh water collection tank, and 16 is a connecting rod. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 7 As shown, a conveyor belt type salt-resistant crystallization cylindrical distillation system includes a closed cylindrical glass body 9, a seawater tank 14 is arranged inside the cylindrical glass body 9, the seawater tank 14 and the cylindrical glass body 9 are concentric cylindrical structures, the seawater tank 14 is a four-sevenths arc cylindrical structure, and a freshwater collection tank 15 is formed between the bottom of the seawater tank 14 and the cylindrical glass body 9. The freshwater collection tank 15 is connected to the guide pipe 7 to guide the collected fresh water at any time, and the seawater tank 14 is connected to the water inlet pipe 6, and the water inlet pipe 6 is provided with a pump 5. The seawater tank 14 and the freshwater collection tank 15 are arranged inside the cylindrical glass body 9. Compared with the traditional distillation system with separate seawater and freshwater tanks, this design is more compact, has fewer parts and is easier to maintain, and has the advantage of integrated molding in production and manufacturing.

[0023] The side of the cylindrical glass body 9 is connected to the hollow aluminum bracket 8 to ensure that the seawater tank 14 in the cylindrical glass body 9 is always placed in the right direction. The seawater tank 14 is provided with a conveyor belt evaporation system.

[0024] like Figure 3As shown, the conveyor belt evaporation system includes a composite conveyor belt evaporation surface 2. The composite conveyor belt evaporation surface 2 adopts a double-layer composite closed belt structure, and both ends are sleeved on two rolling bearing columns 3. The inner layer close to the rolling bearing column 3, that is, the water absorption layer, adopts a flexible water absorption and heat preservation material such as hydrophilic hydrogel, non-woven fabric, cellulose paper, etc., and a layer of photothermal porous material is covered on the outside of the water absorption layer to form an outer photothermal layer. The photothermal porous material can be gold nanoparticles or graphene mixed hydrogel, etc., and gold nanoparticles can be loaded on the surface of the water absorption layer or reduced oxide graphene mixed hydrogel can be used. The composite conveyor belt evaporation surface 2 is mounted on two rolling bearing columns 3. When the rolling bearing columns 3 rotate, the composite conveyor belt evaporation surface 2 is driven to move. As time goes by, the evaporation side of the composite conveyor belt evaporation surface 2 will move to the immersion side, and the corresponding immersion side will also turn to the evaporation side. In this way, the salt crystals accumulated during the evaporation process will also be gradually immersed in the main seawater in the seawater tank 14 as the composite conveyor belt evaporation surface 2 rotates. The crystallized salt on the evaporation surface will dissolve quickly, and a new cycle will begin when the immersion side slowly turns back to the evaporation side. This cycle repeats itself, so that the evaporation side always remains in a state of no or only a small amount of crystallized salt, thereby achieving the purpose of resisting salt crystallization and long-term stable operation of the system. The outer sides of the two rolling bearing columns 3 at both ends of the composite conveyor belt evaporation surface 2 are each connected to a buoy 1 specially providing buoyancy through a connecting rod 16. The upper end of the connecting rod 16 is tilted outward to connect to the buoy 1, and the lower end is tilted inward to connect to the rolling bearing column 3. The connecting rod 16 is used to ensure that the lower side of the composite conveyor belt evaporation surface 2 is completely immersed in the main seawater in the seawater tank 14 at an inclined angle, while the upper side is always exposed above the liquid surface. The two buoys 1 are respectively connected to the rolling bearing columns 3 on both sides of the composite conveyor belt evaporation surface 2, which not only support the composite conveyor belt evaporation surface 2 but also provide power to the rolling bearing column 3.

[0025] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a micro motor is built into the cavity of the buoy 1, and the micro motor is connected to the rolling bearing column 3 through a gear connecting rod, and the rolling bearing column 3 is driven to drive the two rolling bearing columns 3, so that the two rolling bearing columns 3 rotate synchronously with the built-in micro motor. The two end faces of the cylindrical glass body 9 are respectively connected to two symmetrical solar photovoltaic panels 4, and each solar photovoltaic panel 4 is connected to a power supply control circuit 13 through a cable. The power supply control circuit 13 is connected to a high-efficiency lithium polymer battery pack 12, and the high-efficiency lithium polymer battery pack 12 is respectively connected to the micro motor built into the buoy 1 through a flexible cable 10. The power supply control circuit 13 boosts the electric energy generated by the photoelectric effect of the solar photovoltaic panel 4 and stores it in the high-efficiency lithium polymer battery pack 12. The flexible cable 10 is retractable and can extend or shrink with the rise and fall of the position of the buoy 1, thereby realizing stable power supply. The cylindrical glass body 9 is connected to a water level control circuit 11, and the water level control circuit 11 is connected to a pump 5. The start and stop of the pump 5 can be controlled to ensure the stability of the water level in the seawater tank 14. Once the water level exceeds the rolling bearing column 3, the water supply is stopped to ensure that the upper side of the composite conveyor belt evaporation surface 2 is above the water and the lower side is under the water.

[0026] The solar photovoltaic panel 4, power supply control circuit 13, water level control circuit 11, high-efficiency lithium polymer battery pack 12, buoy 1 with built-in micro motor, composite conveyor belt evaporation surface 2, etc. constitute the power and power structure of the present invention.

[0027] It should be understood that the parts not elaborated in detail in this specification belong to the prior art. The above embodiments are only descriptions of the preferred implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made by ordinary engineers and technicians in this field to the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A conveyor belt type salt-resistant crystallization cylindrical distillation system, characterized in that It includes a cylindrical glass body, in which a seawater tank is arranged, the seawater tank is a four-sevenths arc cylindrical structure, the seawater tank is an arc cylindrical structure concentric with the cylindrical glass body, and a fresh water collection tank is formed between the seawater tank and the cylindrical glass body; the fresh water collection tank is connected to a guide pipe, the seawater tank is connected to a water inlet pipe provided with a pump, the side of the cylindrical glass body is connected to a hollow aluminum bracket, the seawater tank in the cylindrical glass body is always placed forward, and a conveyor belt evaporation system is arranged on the seawater tank; the conveyor belt evaporation system includes a composite conveyor belt evaporation surface, the composite conveyor belt evaporation surface adopts a double-layer composite closed belt structure, both ends of which are sleeved on two rolling bearing columns, the water absorption layer close to the rolling bearing column is coated with a photothermal layer, the water absorption layer adopts one of hydrophilic hydrogel, non-woven fabric, and cellulose paper, and the photothermal layer adopts gold nanoparticles. Rice particles or graphene mixed hydrogel; the rolling bearing column rotates to drive the evaporation surface of the composite conveyor belt to move, the outer sides of the two rolling bearing columns are each connected to a buoy through a connecting rod, the upper end of the connecting rod is inclined outward to connect the buoy, and the lower end is inclined inward to connect the rolling bearing column, and the buoy is built with a micro motor for driving the rolling bearing column; the two end faces of the cylindrical glass body are respectively connected to two symmetrical solar photovoltaic panels, each solar photovoltaic panel is connected to a power supply control circuit, the power supply control circuit is connected to a high-efficiency lithium polymer battery pack, and the high-efficiency lithium polymer battery pack is respectively connected to the micro motor built into the buoy through a flexible cable; the cylindrical glass body is connected to a water level control circuit, and the water level control circuit is connected to a pump to ensure that the lower side of the evaporation surface of the composite conveyor belt is completely immersed in the main seawater in the seawater tank, while the upper side is always exposed to the liquid surface.

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