KR20190103509A - Evaporator for Seawater Desalination Equipment and its Manufacturing Method Using 3D Printing - Google Patents

Abstract

The present invention relates to an evaporator which is a part used in an evaporation type seawater desalination facility and a method for manufacturing the same. In particular, by forming a coating layer of the evaporator with a good corrosion resistance material, the corrosion due to seawater is minimized. By forming the coating layer and a pattern layer into a porous structure using 3D printing, the speed of the seawater flowing in the evaporator is controlled, and the energy efficiency of the evaporator is increased.

Description

Evaporator for Seawater Desalination Equipment and its Manufacturing Method Using 3D Printing}

The present invention relates to an evaporator which is a component used in an evaporation desalination plant and a method of manufacturing the same.

Seawater desalination refers to a process in which salt is removed to obtain fresh water for use in beverages or other uses in seawater containing salt. Types of seawater desalination technologies include evaporation, crystallization, reverse osmosis, and electrodialysis.

The double evaporation method is the desalination technology using the evaporation phenomenon among the seawater desalination technology, which is the oldest and most widely used, and has economical strengths and strengths in large-scale desalination facilities. The basic principle of the evaporation method is to separate freshwater from seawater by using the property that only the solvent evaporates and the solute remains when evaporating the solution.The seawater desalination evaporator heats the seawater to a boiling point to a boiling point to remove water as a solvent. It is a technique of obtaining fresh water by evaporating water vapor and condensing the water vapor again using a low temperature heat source.

1 is a view of the prior art seawater desalination plant of the evaporation method, which is disclosed in Korea Patent Publication No. 10-2016-0092263 (2016.08.04).

Referring to FIG. 1, the constitution of an evaporation seawater desalination plant 90 may be largely divided into an evaporator 91 for heating and vaporizing seawater and a condenser 93 for liquefying the vaporized corresponding steam using a low temperature heat source. .

The conventional evaporator has a limited portion that can control the flow rate of seawater during the evaporation process, it required a lot of energy to evaporate the seawater. In addition, since seawater has a large amount of chlorine ions and dissolved oxygen, frequent replacement of parts due to corrosion of the evaporator is required in the process of heating and evaporating seawater.

The present invention has been made to solve the above problems,

An object of the present invention is to provide a substrate for heating seawater to evaporate seawater, a coating layer formed on the surface of the substrate to prevent corrosion of the evaporator, and formed on the surface of the coating layer to control the flow rate of seawater in the evaporator. By constructing an evaporator for seawater desalination plant comprising a pattern layer, by laminating the coating layer and the pattern layer in a 3D printing method to increase the corrosion resistance of the evaporator, while controlling the flow rate of seawater in the evaporator to increase energy efficiency The present invention provides a cost-effective evaporator for seawater desalination plant and a method of manufacturing the same.

Another object of the present invention is to increase the energy efficiency of the seawater desalination plant by 3D printing a coating layer and a patterned layer coated with a material having excellent corrosion resistance and thermal conductivity on an inexpensive material having low corrosion resistance but low thermal conductivity. The present invention provides a highly competitive seawater desalination plant evaporator and a method of manufacturing the same.

Another object of the present invention, by forming a coating layer and a pattern layer having a variety of characteristics by applying the 3D printing technology to the evaporator for seawater desalination plant that can meet a variety of needs according to the situation of the customer or installation site and its manufacturing method To provide.

Another object of the present invention, the coating layer includes a first region and a second region, the second region and the first region to have a different structure and / or material so that the various functions of the evaporator for seawater desalination plant and It is to provide a manufacturing method.

Still another object of the present invention is that the coating layer forms a different thickness of the coating layer, so that the angle of inclination of the surface of the coating layer is larger in the outflow region of the seawater than in the inflow region of the seawater, and flows on the surface of the evaporator. It is to provide an evaporator for a seawater desalination plant and a method of manufacturing the same that can make the speed of seawater constant.

Another object of the present invention, the coating layer is composed of a laminate having a multi-layer structure to control the flow rate of the seawater in the evaporator, the seawater desalination plant that can increase the energy efficiency by widening the surface area in contact with the seawater evaporator It is to provide an evaporator and a method of manufacturing the same.

Another object of the present invention, the coating layer is configured to further comprise a plurality of spaces consisting of empty spaces between the stack, to control the flow rate of seawater in the evaporator, by increasing the surface area of the evaporator in contact with the seawater It is to provide an evaporator for a seawater desalination plant and a method of manufacturing the same that can increase energy efficiency.

Another object of the present invention, the coating layer is configured to further include a three-dimensional channel formed by the space is in communication with each other, to control the flow rate of seawater in the evaporator, energy efficiency by widening the surface area that the evaporator is in contact with the seawater It is to provide an evaporator for the seawater desalination plant and a method of manufacturing the same that can increase the.

Still another object of the present invention is to control the flow rate of the seawater in the evaporator by forming a flow path through which the unit layers stacked in an irregular shape are continuous at regular intervals and fluid flows between neighboring unit layers. The present invention also provides an evaporator for a seawater desalination plant and a method of manufacturing the same, which can increase energy efficiency by widening a surface area in contact with seawater.

It is still another object of the present invention to provide an evaporator for a seawater desalination plant and a method of manufacturing the same, wherein the unit layer includes a curved surface including protrusions and grooves, thereby increasing energy efficiency by increasing the surface area of the evaporator in contact with the seawater. It is.

The present invention is implemented by the embodiment having the following configuration to achieve the above object.

According to an embodiment of the present invention, the present invention provides a substrate for heating seawater to evaporate seawater, a coating layer formed on the surface of the substrate to prevent corrosion of the evaporator, and a surface formed on the surface of the coating layer in the evaporator. Characterized in that it comprises a pattern layer for controlling the flow rate of sea water.

According to another embodiment of the present invention, the present invention is characterized in that the substrate is a material having excellent thermal conductivity, and the coating layer and the pattern layer are materials having excellent thermal conductivity and corrosion resistance.

According to another embodiment of the present invention, the present invention, the coating layer is formed by varying the thickness of the coating layer, the angle of inclination of the surface of the coating layer relative to the ground is greater in the outflow area of seawater than in the inflow area of seawater It is characterized by.

According to another embodiment of the present invention, the present invention is characterized in that the coating layer includes a laminate having a multilayer structure.

According to an embodiment of the present invention, the present invention is characterized in that the coating layer further comprises a plurality of spaces consisting of empty spaces between the laminates.

According to an embodiment of the present invention, the present invention is characterized in that the coating layer further comprises a three-dimensional channel formed by the space communicating with each other.

According to an embodiment of the present invention, the present invention is characterized in that the coating layer is produced by combining metal powders in a state where the surface of the substrate is melted.

According to one embodiment of the present invention, the present invention is that the pattern layer comprises a unit layer stacked in an irregular shape to form a flow path through which fluid flows between adjacent unit layers are continuous at regular intervals. It features.

According to an embodiment of the present invention, the unit layer is characterized in that the protrusions and bridges are formed to be bent repeatedly.

According to an embodiment of the present invention, the unit layer is characterized in that the metal powder melted by a laser is produced by bonding and laminating on the surface of the coating layer.

According to an embodiment of the present invention, the present invention is characterized in that the unit layer further comprises a plurality of spaces consisting of empty spaces between the stacks.

According to an embodiment of the present invention, the present invention is characterized in that the unit layer further comprises a three-dimensional channel formed by communicating the space with each other.

According to an embodiment of the present invention, the present invention is characterized in that the pattern layer is produced by combining the metal powder in the molten state of the surface of the coating layer.

According to another embodiment of the present invention, in the manufacturing method of the present invention, the coating layer forming step is to supply a metal powder by irradiating a laser, the metal powder reaches the surface of the substrate in a state of melting by the heat supplied by the laser The coating layer is formed by bonding, and the pattern layer forming step is to supply a metal powder by irradiating a laser, so that the pattern layer is formed by bonding to reach the surface of the coating layer while the metal powder is melted by the heat supplied by the laser. Characterized in that.

According to another embodiment of the present invention, the manufacturing method of the present invention, in the forming of the coating layer, irradiating a laser on the surface of the substrate to melt the surface of the substrate, and supplying a metal powder on the surface of the molten heat-dissipating substrate coating Forming the step of forming the pattern layer is characterized in that to form a pattern layer by melting the surface of the coating layer by irradiating a laser on the surface of the coating layer, by supplying a metal powder on the surface of the molten coating layer.

According to another embodiment of the present invention, the manufacturing method of the present invention, the irradiation of the laser in the coating layer forming step and the pattern layer forming step is 'front movement-right movement-front movement-left movement' is continuously repeated. Characterized in that along the path.

According to another embodiment of the present invention, the manufacturing method of the present invention, the step of forming the coating layer is a base wall coupled to the surface of the substrate to form a base layer and an additional wall coupled to the base wall to form an additional layer And the pattern layer forming step includes an additional wall coupled to the surface of the coating layer to form a foundation layer and coupled to the foundation wall and the foundation wall to form an additional layer.

The present invention can achieve the following effects by the configuration, combination, and use relationship described above with the present embodiment.

The present invention provides a substrate for heating seawater to evaporate seawater, a coating layer formed on the surface of the substrate to prevent corrosion of the evaporator, and a pattern layer formed on the surface of the coating layer to control the flow rate of seawater in the evaporator. By constructing an evaporator for seawater desalination plant comprising a, to increase the corrosion resistance of the evaporator, to control the flow rate of seawater in the evaporator to increase the energy efficiency to provide an evaporator for seawater desalination plant and its manufacturing method Have

The present invention, the substrate is a material having excellent thermal conductivity, the coating layer and the pattern layer is composed of a material having excellent thermal conductivity and corrosion resistance, to increase the energy efficiency of the seawater desalination plant, strong corrosion resistance evaporator and There is also an effect of providing the production method.

The present invention, the coating layer is formed by varying the thickness of the coating layer, the angle of inclination of the surface of the coating layer relative to the ground consists of a larger in the outflow area of the seawater than in the inflow area of the seawater, flowing in the surface of the evaporator There is an effect of providing an evaporator for a seawater desalination plant and a method of manufacturing the same that can make the speed of seawater constant.

The present invention, the coating layer is composed of a laminate having a multi-layer structure, to control the flow rate of the seawater in the evaporator, the evaporator for seawater desalination plant that can increase the energy efficiency by increasing the surface area in contact with the seawater evaporator and its It has the effect of providing a manufacturing method.

The present invention, the coating layer is configured to further include a plurality of spaces consisting of empty spaces between the stack, to control the flow rate of seawater in the evaporator, to increase the energy efficiency by widening the surface area in contact with the seawater evaporator There is also an effect of providing an evaporator for a seawater desalination plant and a method of manufacturing the same.

The present invention, the coating layer is configured to further include a three-dimensional channel formed by the spaces in communication with each other, to control the flow rate of the seawater in the evaporator, it is possible to increase the energy efficiency by widening the surface area in contact with the seawater evaporator There is an effect to provide an evaporator for a seawater desalination plant and a method of manufacturing the same.

In the present invention, the pattern layer is formed by irregularly stacked unit layers are continuous at regular intervals, forming a flow path through which fluid can flow between neighboring unit layers to control the flow rate of sea water in the evaporator, By increasing the surface area in contact with sea water has an effect of providing an evaporator for seawater desalination plant and a method of manufacturing the same that can increase the energy efficiency.

The present invention has an effect of providing an evaporator for a seawater desalination plant and a method of manufacturing the same, wherein the unit layer is repeatedly formed with a protrusion and a bridge, thereby increasing energy efficiency by increasing the surface area in contact with the seawater.

The present invention, the unit layer is formed by further comprising a plurality of spaces consisting of the empty space between the stack, the evaporator for seawater desalination plant that can increase the energy efficiency by increasing the surface area in contact with the seawater and its manufacture It has the effect of providing a method.

The pattern layer is configured to further include a three-dimensional channel formed by the spaces in communication with each other, to control the flow rate of seawater in the evaporator, to increase the energy efficiency by increasing the surface area of the evaporator in contact with the seawater There is also an effect of providing an evaporator for a seawater desalination plant and a method of manufacturing the same.

1 is a schematic configuration diagram of a prior art seawater desalination plant.
2 is a perspective view of an evaporator according to one embodiment of the present invention.
3 is a side view of FIG. 2;
Figure 4 is a perspective view of the evaporator to vary the thickness of the coating layer according to another embodiment of the present invention.
5 is a side view of FIG. 4.
6 is a cross-sectional view of the coating layer to increase the surface area of the coating layer according to an embodiment of the present invention.
Figure 7 is a diagram illustrating a zigzag pattern layer in accordance with an embodiment of the present invention.
FIG. 8 is a micrograph of a pattern layer embodying the pattern layer shown in FIG. 7 by 3D printing.
9 is a diagram illustrating a square wave pattern layer according to another embodiment of the present invention.
FIG. 10 is a sectional view taken along line AA ′ of FIG. 9;
Figure 11 is a flow chart of the manufacturing method of the evaporator for seawater desalination plant according to an embodiment of the present invention.
12 is a conceptual diagram of one embodiment of the coating layer forming step.
FIG. 13 is a traveling path of the 3D printer tool in FIG. 12. FIG.
14 is an electron micrograph of the coating layer obtained through the progress path of the 3D printer tool of FIG.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the manufacturing method using the evaporator and 3D printing for seawater desalination plant according to the present invention will be described in detail. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Unless otherwise defined, all terms in this specification are equivalent to the general meaning of the terms understood by those of ordinary skill in the art to which the present invention pertains, and in case of conflict with the meaning of the terms used herein Follow the definitions used in the specification. In describing the embodiments of the present invention, the position and movement of each component are defined according to the directions indicated by the arrows in each drawing, and are separately defined in the text as necessary.

2 is a perspective view of an evaporator for seawater desalination plant according to an embodiment of the present invention, Figure 3 is a side view of FIG. Referring to Figures 2 and 3, the present inventors seawater desalination plant evaporator 1 includes a substrate 10, a coating layer 30, a pattern layer 50.

The said base material 10 is a base material which heats and vaporizes the seawater supplied to the evaporator. The substrate 10 may use a material having excellent thermal conductivity such as copper (Cu) to increase energy efficiency of the seawater desalination process.

The coating layer 30 is formed on the surface of the substrate 10 to prevent corrosion of the evaporator 1. Since seawater has a large amount of chlorine ions and dissolved oxygen, corrosion of the evaporator 1 is likely to occur in the process of heating and evaporating seawater. Although the entire evaporator 1 may be made of a single material with a material such as titanium (Ti) having excellent thermal conductivity and corrosion resistance, the material is expensive and thus has a problem in terms of cost. Therefore, the present invention forms a coating layer 30 coated with a material having high corrosion resistance as well as thermal conductivity on the surface of the base material 10 having a low corrosion resistance but having a low corrosion resistance, thereby making the evaporator 1 a multi-material. It is intended to prevent corrosion of the evaporator 1 and to achieve economic efficiency.

4 is a perspective view of an evaporator for varying the thickness of the coating layer according to another embodiment of the present invention, Figure 5 is a side view of FIG. Referring to FIGS. 4 and 5, by stacking the coating layer 30 using a 3D printer, the thickness of the coating layer 30 is variously formed in three dimensions, and the speed of seawater flowing on the surface of the evaporator is adjusted. Can be.

The coating layer 30 includes a first region 301 and a second region 303. The first region 301 and the second region 302 may be formed of the same structure and / or material, but may be formed of different structures and / or materials. In this specification, both "structure and / or material" are referred to as properties.

As shown in FIG. 5, the evaporator 1 is installed at an inclined angle with a constant inclination angle θ according to the installation site. The first region 301 may be an inflow region in which seawater flows into the evaporator 1, and the second region 303 may be an outflow region in which seawater exits the evaporator. The thickness of the coating layer 30 is different from the inclination in the first region 301 which is the seawater inflow region and the inclination in the second region 303 which is the seawater outflow region, so that the seawater flows in the evaporator 1. The angle can be made smaller in the inflow area of seawater, and the inclination angle can be increased in the outflow area. That is, the first region 301 has a predetermined inclination angle and the thickness of the coating layer 30 of the inflow area so as to become thicker from one end to the other end is thinly coated at one end of the seawater inflow area, the other end is the end The thick coating slows down the flow rate of the seawater flowing into the inflow area, thereby increasing the amount of seawater evaporating into fresh water, that is, the evaporation rate. On the other hand, the second region 303 extends from the other end of the first region 301 so that the thickness becomes thinner toward the other end at a predetermined inclination angle, so that the first end of the coating layer 30 in the outflow region is thickly coated. As a result, the flow rate of the seawater is slightly higher than that of the first region. Since seawater is introduced into the evaporator 1 and flows, evaporation of seawater occurs, so the flow rate is lowered in the inflow area and the amount of seawater decreases toward the outflow area, thereby increasing the flow rate in the outflow area. Through this, it is possible to adjust the flow rate of sea water. In addition to adding the change in the thickness of the coating layer to the first region 301 and the second region 303 as described above, the change of the material is added to the first region 301 and the second region 303 to provide corrosion resistance and thermal conductivity. You can also try to change. Thus, the present invention, by applying the 3D printing technology to the evaporator it is possible to implement the evaporator 1 having a variety of functions by changing the structure / material and the like.

6 is a cross-sectional view of the coating layer to increase the surface area of the coating layer according to an embodiment of the present invention. Referring to FIG. 6, the coating layer 30 is formed on the surface of the substrate 10 to increase a heat transfer area, and includes a laminate 31 and a space 33.

The laminate 31 is a laminate formed on the surface of the substrate 10 by using a laser or the like. The laminate 31 includes a foundation wall 311 and an additional wall 312, which is a wall that is joined to the surface of the substrate 10 to form a foundation layer, and the additional wall ( 312 is a wall that is joined on the foundation wall 311 to form an additional layer. The additional wall 312 may be further formed while being joined on the preformed additional wall 312 to increase the height of the stack 31. That is, the laminate 31 has a multilayer structure.

The space 33 is a space formed between the laminates 31 and is a space in which heat is released. Since the foundation wall 311 and the additional wall 312 are stacked in a curved shape to form the stack 31, a plurality of empty spaces, that is, porous structures are formed inside the stack 31. The space 33 effectively increases the surface area of the stack 31, and as a result allows the heat transfer in the evaporator 1 to be carried out efficiently.

In addition, according to an embodiment of the present invention, the coating layer 30 includes a three-dimensional channel 35 formed by communicating the space 33 with each other to enable air flow. The three-dimensional channel 35 allowing the space 33 to communicate with each other increases the heat transfer efficiency by forming a flow path through which the seawater flows by communicating with the space 33. That is, by allowing the seawater to flow smoothly through the three-dimensional channel 35 it is possible to maximize the heat transfer effect in the evaporator (1).

7 is a diagram illustrating a zigzag pattern layer according to an embodiment of the present invention, FIG. 8 is an exemplary photograph of FIG. 7, and FIG. 9 is a square wave pattern layer according to an embodiment of the present invention. It is a schematic diagram. 7 to 9, the pattern layer 50 is formed on the surface of the coating layer 30 and includes a plurality of unit layers 51 having a specific shape, and each unit layer ( 51 is formed spaced apart at regular intervals, by forming a flow path through which the fluid can flow between the adjacent unit layer 51, thereby controlling the speed of the sea water flowing on the surface of the evaporator (1). Like the material of the coating layer 30, the pattern layer 50 uses a material having excellent thermal conductivity and corrosion resistance, such as titanium (Ti), in order to prevent corrosion by seawater.

The pattern layer 50 includes a plurality of unit layers 51. The unit layer 51 is formed by 3D printing to have a structure that can slow down the flow rate of seawater. Each unit layer 51 includes a first wall 513 and a second wall 515, and the first wall 513 and the second wall 515 are formed in 3D printing to achieve a predetermined angle a. And a predetermined angle a is 0 ° <a <180 °. The first wall 513 and the second wall 515 are repeatedly formed by 3D printing to form the unit layer 51. The unit layer 51 may be formed to have a zigzag shape or a quadrangle shape as illustrated in FIG. 9 as shown in FIG. 7. According to another embodiment of the present invention, it may be formed to have various patterns in addition to the zigzag shape or the square shape.

The pattern layer 50 is introduced into the evaporator 1 by forming a flow path through which a unit layer 51 having a specific shape is continuous at regular intervals and fluid flows between the neighboring unit layers 51. When seawater flows on the surface of the evaporator 1, it is allowed to flow along the wall of the unit layer 51. Since the seawater flowing along the wall of the unit layer 51 increases the length of the flow and the velocity also decreases, the residence time in the evaporator 1 increases. Therefore, the seawater introduced from the evaporator 1 is secured the time required for heating and evaporating, it is possible to further increase the efficiency of the evaporation process of the seawater desalination plant.

10 is a cross-sectional view of the pattern layer 50 and an enlarged view thereof according to an embodiment of the present invention. Referring to FIG. 10, the unit layer 51 irradiates a surface of the coating layer with a laser to melt the surface of the coating layer 30 to form a molten pool 103, and to form a metal in the molten pool 103. By supplying the powder 102 to be bonded and laminated on the surface of the coating layer 30, it can be formed in an irregular shape, it can be formed as a curved surface 511 in which the protrusions 5111 and grooves 5113 are repeated. . The curved surface 511 increases the area where the unit layer 51 and the seawater contact each other, so that heat transfer to the seawater is efficiently performed, and finally, the thermal efficiency of the evaporator 1 is increased.

11 is a flowchart of a method of manufacturing an evaporator for seawater desalination plant according to an embodiment of the present invention. Referring to Figure 11, the manufacturing method of the evaporator for seawater desalination plant includes a substrate preparation step (S10), coating layer forming step (S30), pattern layer forming step (S50).

The substrate preparation step (S10) is a step of preparing the evaporation substrate 10 to be the base material to form the coating layer (30). As described above, the substrate 10 is a substrate for heating and vaporizing seawater introduced into the evaporator 1, and is composed of a material having excellent thermal conductivity.

The coating layer forming step (S30) is a step of forming a coating layer 30 on the surface of the substrate 10. The coating layer 30 formed in the coating layer forming step (S30) prevents corrosion by the seawater of the substrate 10, forms a multi-layer structure to increase the thermal surface area to improve the heat transfer efficiency to the seawater.

12 is a conceptual diagram of an embodiment of the coating layer forming step (S30). Referring to FIG. 12, it is shown that the coating layer 30 is formed by using the 3D printer P. The tool 100 of the 3D printer P has the laser 101 at the top of the substrate 10. ) And at the same time the supply of the metal powder 102 as the cladding material is made.

12 is a conceptual diagram of an embodiment of the coating layer forming step (S30). Referring to this, it is shown that the coating layer 30 is formed by using the 3D printer P. The tool 100 of the 3D printer P has a laser 101 on the surface of the upper portion of the substrate 10. Irradiated to melt the substrate 10 to form a molten pool 103, and at the same time the supply of the metal powder 102 as a cladding material.

In the coating layer forming step (S30) illustrated in FIG. 12, the surface of the substrate 10 is irradiated with a laser to melt the substrate 10 to form a molten pool 103, and the metal powder 102 in the molten pool 103. It is made in such a way to form a coating layer 20 by supplying. The metal powder 102 may be titanium (Ti) or the like having excellent corrosion resistance.

When the coating layer forming step (S30) is performed in the same manner as in the embodiment shown in FIG. 12, the metal powder 102 is supplied onto the molten pool 103 formed by melting the surface of the substrate 10, and thus bonding occurs. A strong bond can be made between the 10 and the coating layer 30. Therefore, the evaporator 1 excellent in durability with little possibility of peeling of the said coating layer 30, etc. can be obtained.

In FIG. 12, the traveling path of the tool 100 of the 3D printer P, that is, the irradiation of the laser 101 is repeated as shown in FIG. 13 by 'front movement-right movement-front movement-left movement'. It can be done along the path which is made. This approach is suitable for the manufacture of coating layer 30 having a plurality of voids (porous structure) inside the coating layer as shown in FIG. 6. That is, a multilayer structure including a foundation wall 311 coupled to the surface of the substrate 10 in this manner to form a foundation layer and an additional wall 312 coupled to the foundation wall 311 to form an additional layer. Laminated body 31 can be formed.

When the coating layer 30 is formed in this manner, turning points c of the foundation wall 311 or the additional wall 312 to be formed are adjacent to the adjacent foundation wall 231 or the additional wall 232. Since it is not in contact with the point (c), the interconnect space (d) can be formed. That is, the turning point (c) is a portion in which the application path of the metal powder and the irradiation path of the laser beam 101 are suddenly changed when forming the laminate 31 to form corners. The bone may be communicated between adjacent turning points (c) through). As a result, in three-dimensional view, the spaces 33 in the stack 31 communicate with each other in one or more directions of front, rear, left and right, and form a three-dimensional channel 35 efficiently, so that smooth seawater flow can be achieved. The heat transfer effect in (1) is maximized. FIG. 14 is an electron micrograph of the coating layer obtained through the traveling path of the 3D printer tool 100 of FIG.

The pattern layer forming step (S50) is a step of forming a pattern layer 50 on the surface of the coating layer 30. The pattern layer 50 formed in the pattern layer forming step S50 adjusts the flow length of the seawater in the evaporator, adjusts the speed, and increases the residence time in the evaporator, thereby heating and evaporating the seawater introduced into the evaporator. To secure the necessary time and to increase the efficiency of the evaporation process of the seawater desalination plant.

As the material of the pattern layer 50 and the coating layer 30, both materials having excellent thermal conductivity and corrosion resistance may be used, and the same material may be used. Since the pattern layer forming step S50 is almost similar to the coating layer forming step S30 described above, a detailed description thereof will be omitted.

Thus, the present invention, by applying the 3D printing technology to the evaporator it is possible to implement the evaporator 1 having a variety of functions by changing the structure / material and the like.

The foregoing detailed description illustrates the present invention. In addition, the above-mentioned content shows and describes preferred embodiment of this invention, and this invention can be used in various other combinations, changes, and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosures described above, and / or the skill or knowledge in the art. The described embodiments illustrate the best state for implementing the technical idea of the present invention, and various modifications required in the specific application field and use of the present invention are possible. Thus, the description of the invention is not intended to limit the invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

1: evaporator
2: condenser
10: description
30: coating layer
31: laminate
311: foundation wall
312: additional walls
33: space
35: three-dimensional channel
37: inlet coating layer
39: outflow zone coating layer
50: pattern layer
51: unit layer
511: curved surface
5111: turning
5113: bridge
S10: substrate preparation step
S30: coating layer forming step
S50: pattern layer forming step
P: 3D printer
100: tool
101: laser
102: metal powder
103: molten pool

Claims (16)

Evaporator used in desalination plant,
A base made of a thermally conductive material,
A coating layer coated on the surface of the substrate to prevent corrosion of the evaporator;
Evaporator for seawater desalination plant formed on the surface of the coating layer comprising a pattern layer for controlling the flow rate of seawater in the evaporator.       The evaporator of claim 1, wherein the pattern layer is formed of a material having thermal conductivity and corrosion resistance. The evaporator of claim 2, wherein the coating layer comprises a first region and a second region having different characteristics from the first region. The evaporator of claim 3, wherein the first region and the second region are formed to have different inclinations.       The method of claim 4, wherein the first region is formed in the inflow region of the seawater and the second region is formed in the outflow region of the seawater, wherein the first region extends from one end of the inflow region to the other end at a predetermined inclination angle and is formed in the second region. Is continuously formed in the first region and extends at an inclination angle opposite to the inclination angle of the first region.       The evaporator of claim 2, wherein the coating layer further comprises a plurality of spaces formed of empty spaces between the laminates.       The evaporator of claim 6, wherein the coating layer further comprises a three-dimensional channel formed by communicating the spaces with each other. The evaporator of any one of claims 1 to 7, wherein the pattern layer includes a plurality of unit layers formed by melting and laminating metal powder on the coating layer.        The seawater desalination plant evaporator of claim 8, wherein the unit layers are formed to be spaced apart by a predetermined interval between neighboring unit layers, and form a flow path through which seawater can flow between neighboring unit layers. The evaporator of claim 9, wherein the unit layer is formed in a zigzag shape to reduce the flow rate of seawater.
The evaporator of claim 10, wherein the unit layer comprises a curved surface including protrusions and recessed grooves protruding from the surface. The evaporator of claim 8, wherein the coating layer and the pattern layer are formed by 3D printing metal powder. A substrate preparation step of preparing the substrate,
A coating layer forming step of forming a coating layer on the surface of the substrate to prevent corrosion of the evaporator;
Evaporator manufacturing method comprising a pattern layer forming step of forming a pattern layer for controlling the flow rate of seawater in the evaporator on the surface of the coating layer. The method of claim 13, wherein the forming of the coating layer comprises: spraying a metal powder on a molten pool formed by irradiating a laser onto a surface of the substrate to form a coating layer by melting the metal powder to bond to the surface of the substrate,
The pattern layer forming step is a method of manufacturing an evaporator for seawater desalination plant to form a pattern layer by injecting a metal powder in a molten pool formed by irradiating a laser on the surface of the coating layer to melt the metal powder to bond to the surface of the coating layer.      The method of claim 14, wherein the forming of the pattern layer comprises forming a unit layer by forming a unit layer by irradiating a laser beam along a zigzag path, and forming the pattern layer by repeatedly performing the forming unit layer. Evaporator manufacturing method for a desalination plant characterized in that. The method of claim 15, wherein the forming of the coating layer includes a foundation wall forming step of forming a foundation wall bonded to the surface of the substrate, and an additional wall formation step of combining on the foundation wall to form an additional wall,
The pattern layer forming step includes a curved surface forming step of forming a curved surface including a protrusion and a groove on the surface of the unit layer manufacturing method of the evaporator for a desalination plant.

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