Desalting device for distillation type seawater desalination apparatus

Abstract

The invention relates to the field of seawater desalination, in particular to a desalting device for a distillation type seawater desalinator, which comprises a desalinator, and a plurality of layers of screens are inserted into one end of the desalinator; the multi-layer screen comprises a frame and screen pieces, the screen pieces are fixedly installed in the frame, the number of the screen pieces on the inner side of the multi-layer screen is not smaller than two, meshes between the screen pieces are transversely arranged in a staggered mode, coatings are arranged on the surfaces of the screen pieces, and the screen pieces are iron wire screen pieces. According to the scheme, a rectangular groove is formed in one side of the desalting device, and a plurality of pulleys are mounted on the desalting device, so that the multiple layers of screens are horizontally plugged in in a sliding manner, and the manner is simple in structure and easy to operate; besides, the rectangular groove is higher than the screen in the multiple layers of screens, and the pulley is only in contact with the frame of the multiple layers of screens, so that the salt crystals are prevented from being scraped by the wall surface and further falling into the desalter when the multiple layers of screens are taken out.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seawater desalination, in particular to a desalination device for a distillation type seawater desalination device. BACKGROUND

[0002] Fresh water is one of the indispensable important resources for modern social family life, agriculture, and industry. More than 70% of the earth's surface is covered by seawater, but seawater contains a large amount of salt and cannot be directly utilized, so it needs to be extracted through seawater desalination. However, after seawater desalination, salt crystallization occurs in the evaporator, which causes deposition in the evaporator, resulting in a decrease in the heat exchange efficiency of the equipment. These salt crystals adhere to the surface of the heat exchanger, forming a thermal resistance that affects the heat transfer efficiency, thereby reducing the energy efficiency of the entire seawater desalination system. In addition, salt crystallization can also cause equipment blockage and corrosion, further increasing the maintenance and cleaning costs of the equipment, prolonging the downtime, and reducing the reliability and stability of the equipment. Furthermore, the presence of salt crystals can adversely affect the quality of the desalinated water. These salt crystals can re-dissolve in the steam tank, causing an increase in the salt concentration in the desalinated water, thereby reducing the purity and quality of the desalinated water. This not only affects the production efficiency and economy of the seawater desalination system, but also can affect the final application of the desalinated water.

[0003] In the patent with application number CN202021224132 and publication date 2021.01.05, a high-salt industrial wastewater resource recovery and treatment system is disclosed, which uses NaOH or Na2CO3 to induce crystallization for the treatment of industrial wastewater. However, in this patent, there is no good way to remove salt crystals, so more complex treatment methods are needed subsequently.

[0004] In the patent with application number CN202410198315 and publication date 2024.03.26, a wastewater treatment device combined with MVR crystallization and salt separation device is disclosed, which uses a cleaning assembly to crush the attached salt to reduce the accumulation of salt. However, this method only reduces the accumulation of salt, and the broken crystals re-dissolve in water, increasing the treatment cost.

[0005] Therefore, how to inhibit the accumulation of salt crystals in water and avoid their potential impact on the operation of the equipment, and develop an efficient desalination device for seawater desalination are urgent problems in the field of solar seawater desalination technology. SUMMARY

[0006] The purpose of the present application is to provide a desalination device for a distillation type seawater desalination device, which induces crystallization by installing a plurality of coarse screens in the seawater desalination device, and improves the interaction between the iron wire and the salt crystals, increases the adhesion of the salt crystals, and reduces the salt accumulation of the salt crystals in the water by coating the screens with a coating, thereby solving the problems presented in the background art.

[0007] To achieve the above-mentioned purpose, a desalination device for a distillation type seawater desalination device, comprising a desalination device, one end of the desalination device is inserted with a plurality of screens; The plurality of screens comprises a frame and a screen mesh, a plurality of screen meshes are fixedly installed inside the frame, the number of screen meshes inside the plurality of screens is not less than two, the mesh between the screen meshes is arranged in a transverse staggered manner, the surface of the screen mesh is provided with a coating, and the screen mesh is an iron wire screen mesh; One end of the plurality of screens is fixedly connected with a sealing rubber ring, and the sealing rubber ring is in the shape of a T.

[0008] Further, the material of the coating is activated carbon.

[0009] Further, the inner wall of the desalination device is provided with a plurality of pulleys below the insertion position of the plurality of screens.

[0010] Further, the top of the desalination device is fixedly installed with a water injection pipe and a steam pipe, and the bottom of the desalination device is fixedly installed with a drain pipe, and one end of the water injection pipe and the drain pipe is fixedly installed with a valve.

[0011] Further, a heating coil is fixedly installed between the water injection pipe and the drain pipe inside the desalination device, and the heating coil is located below the plurality of screens.

[0012] Further, the size of the frame of the plurality of screens is matched with the size of the inner wall of the desalination device Further, one end of the sealing rubber ring towards the outside of the desalination device is provided with a pull ring, and the middle part of the pull ring is provided with a vertical through hole.

[0013] Further, a rectangular slot with a size matched with the size of the plurality of screens is formed in the outer wall of the desalination device.

[0014] Further, one end of the sealing rubber ring towards the desalination device is provided with a protruding strip, and one end of the desalination device towards the sealing rubber ring is provided with a slot with a size matched with the size of the protruding strip.

[0015] Further, the length of the sealing rubber ring is greater than the width of the plurality of screens.

[0016] Compared with the prior art, the present application has the following advantages: 1、 In this scheme, a rectangular slot is opened on one side of the desalinator, and multiple pulleys are installed on the desalinator, so that the multi-layer screen is horizontally inserted by sliding. This way is simple in structure and easy to operate. In addition, the height of the rectangular slot is higher than the height of the screen in the multi-layer screen, and the pulley only contacts the frame of the multi-layer screen, avoiding scratching the salt crystals by the wall when taking out the multi-layer screen, and then falling into the desalinator; 2、 In this scheme, the multi-layer screen is inserted into the multi-layer screen. When the water vapor evaporates, the salt in the seawater tends to be saturated and accumulates on the surface of the wire screen, forming salt crystals. Because the surface of the wire mesh is rough and coated with a coating, the surface crystal adhesion is stronger and less likely to fall off. In addition, the wire mesh is formed by multiple wire meshes staggered and stacked. This staggered and stacked method increases the crystal surface area and crystal space, and also reduces the risk of blocking the multi-layer wire mesh, which helps to improve the efficiency and controllability of salt crystallization in the seawater desalination process; 3、 In this scheme, when there are enough crystals attached to the multi-layer wire mesh, the wire mesh is taken out and replaced with a wire mesh without crystals, and the seawater desalination process continues. Through the above method, the deposition of salt crystals on the wire can be better controlled, and the subsequent removal or processing is facilitated. This helps to improve the efficiency and controllability of the seawater desalination process, thereby achieving more reliable and sustainable seawater desalination. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a vertical view of the device before the multi-layer screen is inserted in the present application; Fig. 2 is a schematic view of the internal structure of the device after the multi-layer screen is inserted in the present application; Fig. 3 is a partial enlarged view of the multi-layer screen and the sealing rubber ring on one side of the multi-layer screen in the present application.

[0018] In the figure: 1, desalinator; 11, multi-layer screen; 111, sealing rubber ring; 12, water injection pipe; 13, steam pipe; 14, pulley; 15, valve; 16, heating coil; 17, drain pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] A desalination device for distillation type seawater desalinator, such as Figs. 1-3As shown, the desalination device 1 comprises a desalination device 1 characterized in that one end of the desalination device 1 is inserted with a multi-layer screen 11; The multi-layer screen 11 comprises a frame and screen meshes, a plurality of screen meshes are fixedly installed inside the frame, the number of screen meshes inside the multi-layer screen 11 is not less than two, the mesh between the screen meshes is arranged in a transverse staggered manner, the surface of the screen mesh is provided with a coating, and the screen mesh is a wire screen mesh; One end of the multi-layer screen 11 is fixedly connected with a sealing rubber ring 111, and the sealing rubber ring 111 is in the shape of a T.

[0021] Specifically, the material of the coating is activated carbon, which has strong adsorption capacity due to its high surface area, and can adsorb various salts. Although it has stable chemical properties, it usually needs to be replaced or regenerated regularly to maintain the salt adsorption effect. It needs to be supplemented that the coating is used to help intercept and absorb salt in water, and the coating can also be made of cotton cloth to effectively adsorb and isolate salt.

[0022] Among them, in order to facilitate the insertion of the multi-layer screen 11 into the desalination device 1, a plurality of pulleys 14 are arranged on the inner wall of the desalination device 1 at the lower side of the insertion position of the multi-layer screen 11. When the multi-layer screen 11 is taken out, the pulley 14 only contacts the frame of the multi-layer screen 11, so as to avoid scratching the salt crystals on the wall surface when taking out the multi-layer screen 11, and then falling into the evaporator, so that the multi-layer screen 11 is horizontally inserted in a sliding manner. This way is simple in structure and easy to operate, making the insertion and removal of the multi-layer screen 11 more labor-saving.

[0023] It can be understood that the top of the desalination device 1 is fixedly installed with a water injection pipe 12 and a steam pipeline 13, respectively used for supplementing seawater and discharging pure steam, and the bottom of the desalination device 1 is fixedly installed with a drain pipe 17, which can discharge the residual seawater in the desalination device 1 when needed. One end of the water injection pipe 12 and the drain pipe 17 is fixedly installed with a valve 15 to facilitate the control of the inflow and outflow of seawater, and facilitate the use of the device.

[0024] Specifically, the inside of the desalination device 1 is fixedly installed with a heating coil 16 between the water injection pipe 12 and the drain pipe 17, which is used for heating the seawater in the desalination device 1. The heating coil 16 is located on the lower side of the multi-layer screen 11, so that the seawater falling from the water injection pipe 12 can first contact the multi-layer screen 11.

[0025] It can be understood that in order to make the seawater passing through the multi-layer screen 11 be able to contact the screen mesh and the coating, the size of the frame of the multi-layer screen 11 is matched with the size of the inner wall of the desalination device 1, and the screen mesh can be a wire screen mesh. The wire screen has high strength, strong corrosion resistance, and long service life. Even in harsh environments such as high temperature, humidity or acid and alkali environment, the wire screen can maintain stable performance, reducing the cost of maintenance and replacement; It should be noted that the price of the wire mesh is relatively low, and the cost performance is high. Compared with other high-grade materials such as stainless steel or high-strength alloy, the wire mesh has obvious cost performance advantage.

[0026] To facilitate the removal of the multi-layer screen 11, the end of the sealing rubber ring 111 towards the outside of the desalinator 1 is provided with a pull ring, and the middle of the pull ring is provided with a vertical through hole. Some external tools such as crowbar or rope can be used to pull out the sealing rubber ring 111 and the multi-layer screen 11 through the through hole to clean or replace them.

[0027] To facilitate the insertion of the multi-layer screen 11 into the desalinator 1, a rectangular slot with a size suitable for the multi-layer screen 11 is formed in the outer wall of the desalinator 1. It should be noted that the screen mesh in the multi-layer screen 11 is located near the middle of the frame, so that when the multi-layer screen 11 is removed, the salt crystals on the surface of the screen mesh can be prevented from contacting the rectangular slot.

[0028] To make the connection between the sealing rubber ring 111 and the desalinator 1 more stable, the end of the sealing rubber ring 111 towards the desalinator 1 is provided with a protrusion, and the end of the desalinator 1 towards the sealing rubber ring 111 is provided with a slot with a size suitable for the protrusion.

[0029] It can be understood that the length of the sealing rubber ring 111 is greater than the width of the multi-layer screen 11, so that the contact between the sealing rubber ring 111 and the desalinator 1 is more stable.

[0030] In this embodiment, before starting the seawater desalination, the multi-layer screen 11 is first inserted into the desalinator 1 from the rectangular slot on the outside of the desalinator 1. During the process, the multi-layer screen 11 is horizontally inserted by sliding with the help of the pulley 14, which is more labor-saving. The sealing rubber ring 111 cooperates with the multi-layer screen 11 to close the rectangular slot of the desalinator 1, so that a closed cavity is formed in the desalinator 1. Then, the valve 15 on the water inlet pipe 12 is opened, and seawater is smoothly injected into the desalinator 1. After the seawater is filled, the valve 15 on the water inlet pipe 12 is closed, and heating steam is injected into the heating coil 16 to heat the seawater. As the temperature of the seawater rises, the water in the seawater gradually evaporates, the steam is discharged from the steam pipe 13, and the remaining seawater is continuously concentrated by the increasing salt, which is finally precipitated in the form of crystals on the multi-layer screen 11. Once the water level in the desalinator 1 drops below the multi-layer screen 11, heating is immediately stopped, and the multi-layer screen 11 saturated with salt crystals is carefully removed and replaced with a new spare multi-layer screen 11. The above process is repeated continuously during the seawater desalination process to ensure that each seawater desalination operation can maintain high efficiency in long-term use. When the sea water exceeds the grid position, if the multi-layer screen 11 needs to be cleaned or replaced, the heating of the heating coil 16 is first suspended, then the drain valve 15 on the drain pipe 17 is opened to drain the excess sea water, then the multi-layer screen 11 is taken out and replaced with a new one, and the above steps are repeated, so that the continuous sea water desalination treatment can be achieved.

[0031] The above is a further detailed description of the present application in combination with the specific embodiments, and cannot be deemed to limit the specific embodiments of the present application to these descriptions. For ordinary skilled persons in the technical field of the present application, without departing from the concept of the present application, a number of simple deductions or replacements can be made, which shall be deemed to belong to the protection scope determined by the claims submitted by the present application.

Claims

1. A desalination device for a distillation-type seawater desalination unit, comprising a desalination unit (1), characterized in that, One end of the desalination unit (1) is connected to a multi-layer screen (11). The multi-layer screen (11) includes a frame and screen mesh sheets. Several screen mesh sheets are fixedly installed inside the frame. The number of screen mesh sheets inside the multi-layer screen (11) is not less than two. The mesh between the screen mesh sheets is arranged in a horizontally staggered manner. The surface of the screen mesh sheets is coated. The screen mesh sheets are iron wire screen mesh sheets. One end of the multi-layer screen (11) is fixedly connected to a sealing rubber ring (111), and the sealing rubber ring (111) is T-shaped.

2. The desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The coating material is activated carbon.

3. The desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The inner wall of the desalination unit (1) is provided with several pulleys (14) on the lower side of the insertion point of the multi-layer screen (11).

4. A desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The top of the desalination unit (1) is fixedly equipped with a water injection pipe (12) and a steam pipe (13), and the bottom of the desalination unit (1) is fixedly equipped with a drain pipe (17). A valve (15) is fixedly installed at one end of both the water injection pipe (12) and the drain pipe (17).

5. A desalination device for a distillation-type seawater desalination plant according to claim 4, characterized in that: The desalination unit (1) has a heating coil (16) fixedly installed inside between the water injection pipe (12) and the drain pipe (17), and the heating coil (16) is located below the multi-layer screen (11).

6. A desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The frame size of the multi-layer screen (11) is adapted to the inner wall size of the desalination unit (1).

7. A desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The sealing rubber ring (111) has a pull ring at one end facing the outside of the desalination unit (1), and a vertical through hole is provided in the middle of the pull ring.

8. A desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The outer wall of the desalination unit (1) is provided with a rectangular groove that matches the size of the multi-layer screen (11).

9. A desalination device for a distillation-type seawater desalination plant according to claim 1, characterized in that: The sealing rubber ring (111) has a protrusion at one end facing the desalination unit (1), and the desalination unit (1) has a slot at one end facing the sealing rubber ring (111) that matches the size of the protrusion.

10. A desalination device for a distillation-type seawater desalination plant according to claim 9, characterized in that: The length of the sealing rubber ring (111) is greater than the width of the multi-layer screen (11).

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