KR20180088362A - Heat source equipment for evaportation pond and method for improving evaporation rate of evaportation pond using the same - Google Patents

Abstract

The heat source equipment for an evaporation pond includes a concave mirror, a pedestal and an angle adjuster. The concave mirror is located toward the south from the north side of the evaporation pond and has a reflecting surface which condenses sunlight toward a precipitation layer to increase the temperature of the saline water and simultaneously causes convection and stirring of the saline water. The pedestal supports the concave mirror on the ground. The angle adjuster is coupled to the concave mirror and pedestal and adjusts the inclination angle of the concave mirror depending on seasonal changes so that the concave mirror follows the seasonal altitude of the sun. The reflecting surface is the curved surface set so that the angle of incidence of sunlight to the saline water is maintained at an angle of 30 to 50 degrees from the surface of the saline water, and the sunlight entering the saline water is reflected from the precipitation layer and re-reflected below the water surface to the water surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat source equipment for an evaporation pond and a method for improving the evaporation rate of the evaporation pond using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source facility for an evaporation pond, and more particularly, to a heat source facility for an evaporation pond that improves the efficiency of evaporation using solar heat and a method for improving the evaporation rate of the evaporation pond using the same.

Evaporation pond is a technology to produce resources by using natural evaporation. It is the salt tanning of the salt to make salt and the salt which obtains effective ore or minerals by evaporating salt water. Evaporation pond is a technique that is highly seasonal and climate sensitive, so it is mainly used in a dry climate of 20 ° latitude ('solar belt') with low annual precipitation.

The cost of resource production using the evaporation pond depends on the evaporation rate of the evaporation pond. It is difficult to improve the evaporation rate because the natural evaporation shows fixed characteristics in the same area. And the evaporation rate is lowered in the winter compared to the summer, so the productivity is lowered. Therefore, in order to operate the evaporation pond efficiently, it is necessary to increase the evaporation rate artificially and to reduce the evaporation rate variation due to seasonal factors.

The present invention relates to a heat source facility for an evaporation pond which can increase the evaporation rate of the evaporation pond by applying heat to the evaporation pond without consuming power and lower the variation of the evaporation rate due to seasonal factors to improve the productivity of the evaporation pond, and a method for improving the evaporation rate of the evaporation pond .

The heat source equipment for an evaporation pond according to an embodiment of the present invention includes a concave mirror, a pedestal, and an angle adjusting unit. The concave mirror is located toward the south from the north side of the evaporation pond and has a reflecting surface that condenses solar light toward the sediment layer to raise the temperature of the saline water and simultaneously causes convection and agitation of the saline water. The pedestal supports the concave mirror on the ground. The angle adjuster is coupled to the concave mirror and pedestal and adjusts the inclination angle of the concave mirror according to the seasonal changes so that the concave mirror follows the seasonal altitude of the sun. The reflection surface has a curved surface that is set so that the angle of incidence of sunlight on the salt water is maintained at an angle of 30 to 50 degrees from the surface of the salt water. The sunlight incident on the salt water is reflected from the precipitation layer, Head to the floor.

The concave mirror may be parabolic in cross-section and may have a semi-cylindrical structure extending along the east-west direction.

The angle adjusting unit includes an upper support and a lower support fixed to the rear surface of the concave mirror with a height difference therebetween, an intermediate support coupled to the upper support and the lower support, and a drive coupled to the intermediate support to rotate the intermediate support .

The evaporation rate improving method of an evaporation pond according to an embodiment of the present invention is a method of improving the evaporation rate of an evaporation pond in which a water surface is exposed to the atmosphere and a salt precipitate layer is located on the bottom, A heating step of adjusting the inclination angle of the concave mirror according to the seasonal change and a seasoning step of adjusting the inclination angle of the concave mirror according to the seasonal change; And an inclination angle adjusting step for following the altitude of the sun according to the angle of the sun. The reflecting surface is formed of a curved surface whose angle of incidence of sunlight to the brine is set to maintain an angle of 30 to 50 degrees from the surface of the brine. The sunlight entering the brine at the temperature elevation step is reflected from the precipitation layer and then reflected again under the water surface to the precipitation layer.

The heat source equipment of this embodiment can be applied to all the evaporation ponds using the natural evaporation method. In particular, the operating efficiency of the evaporation pond for the production of potassium (K), boron (B) and lithium (Li) . In addition, the heat source equipment of this embodiment is simple in arrangement of apparatus, and it is advantageous to install on a highland oasis because it does not require special maintenance other than adjusting the inclination angle of the concave mirror when the season is changed.

1 is a configuration diagram of a heat source equipment for an evaporation pond according to an embodiment of the present invention.
Fig. 2 is a sectional view of the heat source equipment for the evaporation pond shown in Fig. 1. Fig.
3 is an enlarged view of the evaporation pond shown in Fig.
4 is a configuration diagram of a heat source equipment for an evaporation pond according to an embodiment of the present invention.
5 and 6 are views showing a state in which the inclination angle of the concave mirror is adjusted in the heat source equipment for the evaporation pond shown in FIG.
FIG. 7 is a graph showing the experimental results on the variation of the evaporation amount with the temperature rise of the solution. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

FIG. 1 is a view illustrating a configuration of a heat source equipment for an evaporation pond according to an embodiment of the present invention, and FIG. 2 is a sectional view of a heat source facility for an evaporation pond shown in FIG.

Referring to FIGS. 1 and 2, the evaporation pond 200 may be an artificial pond having a certain depth and arranged long along the east-west direction. In the evaporation pond 200, for example, brine can be stored, and the brine can be evaporated and concentrated to produce resources such as potassium (K), boron (B), and lithium (Li).

In recent years, in the case of lithium having a high demand, a brine containing a low concentration of lithium is introduced into an evaporation pond (200) and concentrated by natural evaporation for a long period of time for one to two years to prepare a high concentration solution. Lithium can be obtained.

The heat source equipment 100 for the evaporation pond includes a concave mirror 110 that reflects and condenses the sunlight to the evaporation pond 200. The concave mirror 110 is installed on the north side of the evaporation pond 200 and has a linear structure parallel to the evaporation pond 200. That is, the concave mirror 110 is parabolic in cross section and has a semi-cylindrical structure extending along the east-west direction.

The concave mirror 110 has a reflection surface toward the evaporation pond 200. In addition to the sunlight directly incident from the sun, sunlight reflected and condensed by the reflection surface is added to the evaporation pond 200 and incident thereon. Therefore, evaporation of the water is promoted by the amount of sunlight in the evaporation pond 200, and the evaporation rate is improved.

3 is an enlarged view of the evaporation pond shown in Fig.

Referring to FIG. 3, when the sunlight reflected by the concave mirror 110 and incident on the water is reflected at the water surface, the heating efficiency is lowered. Therefore, it is necessary to adjust the incident angle to suppress surface reflection. The angle of incidence also has the effect of restraining sunlight from re-reflecting into the air in the water.

As described above, the angle of incidence of solar light is directly related to the thermal efficiency of sunlight and becomes a main decision function when designing the curved surface of the concave mirror 110. In the heat source equipment 100 for the evaporation pond of this embodiment, the reflecting surface of the concave mirror 110 can be set to have a curved surface such that the angle of incidence of sunlight is maintained at an angle of 30 to 50 degrees from the water surface.

If the angle of incidence of the sunlight reflected by the concave mirror 110 is less than 30 degrees or greater than 50 degrees, most of the sunlight is totally reflected from the water. Therefore, even if the concave mirror 110 provides solar light toward the evaporation pond 200, the evaporation rate improving effect due to this is lowered.

Also, the concave mirror 110 may be installed so that the condensing focus of the reflecting surface corresponds to the bottom of the evaporation pond 200. The bottom surface of the evaporation pond 200 may exhibit white color due to accumulated magnesium hydroxide, calcium chloride, or the like. The bottom surface of white reflects sunlight in water without absorbing sunlight.

Since the heating by the sunlight is focused on the focal point, a part of the water near the floor surface is heated and the temperature rises. At this time, the convection phenomenon of the solution occurs due to the temperature difference between the heated portion and the unheated periphery, and as a result, the water inside the evaporation pond 200 is slowly agitated.

Referring back to FIGS. 1 and 2, since the concave mirror 110 is arranged long in the east-west direction, it is unnecessary to change the angle depending on the position of the sun that runs from morning to afternoon during the day. However, since the altitude of the sun changes according to the season, the heat source equipment 100 of the present embodiment may include a mechanism for adjusting the inclination angle of the concave mirror 110 so as to follow the altitude of the sun according to the season.

4 is a configuration diagram of a heat source equipment for an evaporation pond according to an embodiment of the present invention.

4, the heat source equipment 100 for an evaporation pond includes a pedestal 120 that supports the concave mirror 110 on the ground, a concave mirror 110, and a pedestal 120 that are coupled to the concave mirror 110, And an angle adjusting unit 130 for adjusting the angle of view. The pedestal 120 may be in the form of a column, and may be provided in plurality along the longitudinal direction of the concave mirror 110.

The angle adjusting unit 130 includes upper and lower supporting members 131 and 132 fixed to the rear surface of the concave mirror 110 with a height difference therebetween and an upper supporting member 131 and a lower supporting member 132 And a driving unit 140 coupled to the intermediate support 133 to rotate the intermediate support 133.

The upper support base 131 and the lower support base 132 may be parallel to each other and the length of the upper support base 131 may be greater than the length of the lower support base 132. The lower end of the intermediate support 133 is fixed to the lower support 132 and the lower support 132 and the intermediate support 133 are hinged to the support 120. [ That is, the lower support 132 and the intermediate support 133 are coupled to the pedestal 120 by a fixed hinge 134.

The upper end of the intermediate support 133 is hinged to the upper support 131 by the movable hinge 135. The movable hinge 135 includes a guide hole 136 formed along the longitudinal direction of the intermediate support 133 and a fixed pin 137 fixed to the upper support 131 and fitted in the guide hole 136 .

The driving unit 140 may include a driving cylinder 142 having a piston 141 moving in the up and down direction and a connecting arm 143 connecting the center of the intermediate support 133 and the end of the piston 141 . The drive cylinder 142 may be installed at the ground and may be located further away from the concave mirror 110 than the pedestal 120. Both ends of the connecting arm 143 are hinged to the middle portion of the intermediate support 133 and the end of the piston 141. [

5 and 6 are views showing a state in which the inclination angle of the concave mirror is adjusted in the heat source equipment for the evaporation pond shown in FIG.

5, when the piston 141 is moved up by the operation of the driving cylinder 142, the connecting arm 143 pushes the central portion of the intermediate support 133. Then, the intermediate support 133 and the lower support 132 rotate counterclockwise about the fixed hinge 134 to change the inclination angle of the concave mirror 110. The fixing pin 137 of the upper support base 131 can be positioned at the uppermost position of the guide hole 136 when the piston 141 is located at the highest point.

6, when the piston 141 is lowered by the operation of the driving cylinder 142, the connecting arm 143 pulls the middle portion of the intermediate support 133. The intermediate support 133 and the lower support 132 rotate clockwise about the fixed hinge 134 to change the inclination angle of the concave mirror 110. The fixing pin 137 of the upper support base 131 can be positioned at the lowermost end of the guide hole 136 when the piston 141 is located at the lowest point.

Referring to FIGS. 4 to 6, in the summer when the altitude of the sun is high, the piston 141 is located at the lowest point as shown in FIG. 6, so that the concave mirror 110 can follow the high sun altitude in summer. In the winter when the sun altitude is low, as shown in FIG. 5, the piston 141 is positioned at the highest point so that the concave mirror 110 follows the low sun altitude in winter.

In the spring and autumn, the piston 141 may be positioned at an intermediate point as shown in FIG. 4 so that the concave mirror 110 follows the sun altitude in spring and autumn. Thus, the angle adjusting unit 130 having the above-described configuration can easily cope with the sun altitude according to the season only by a simple operation of operating the drive cylinder 142 once at the time when the season changes.

The heat source equipment 100 having the concave mirror 110 has a difference in that the evaporation rate is increased without energy conversion means as compared with the prior art in which solar light is converted into electricity and the water of the thus obtained electric furnace evaporation pond is warmed.

The heat source facility 100 described above can improve the evaporation rate of the evaporation pond 200 to increase the productivity of the evaporation pond 200 and improve the evaporation rate of the winter when the evaporation rate is low due to the low temperature of the solution compared with the summer, Thereby enabling operation of the fond 200.

In addition, the heat source equipment 100 of the present embodiment is simple in construction and is advantageous for installation on a highland oasis because it requires no special maintenance other than adjusting the inclination angle of the concave mirror 110 when the season is changed.

Monthly evaporation and annual evaporation in Argentina are shown in Table 1 below. Because Argentina is located in the southern hemisphere of the earth, the season is opposite to that of the earth's northern hemisphere.

Monthly evaporation (mm / month) Annual Evaporation Rate
(mm / year) January February In March April In May June In July August September October November December 313 300 275 250 225 200 187 200 225 250 275 300 3,000

As shown in Table 1, the winter evaporation rate is about 60% of that in summer, mainly due to the decrease in evaporation due to the lowering of the solution temperature.

When the solution temperature of the evaporation pond is increased by concentrating sunlight as in the present embodiment, the evaporation rate in the winter season can be improved, and in the summer season, the evaporation rate can be further increased, The deviation can be reduced. As a result, the process efficiency of the evaporation pond can be improved.

FIG. 7 is a graph showing the experimental results on the variation of the evaporation amount with the temperature rise of the solution. FIG. Experiments were conducted in the presence of ambient air, or wind.

Referring to FIG. 7, it is confirmed that the evaporation rate is doubled every time the temperature rises by 10 ° C based on normal temperature (20 ° C). The purpose of the actual heat source equipment of the present embodiment is not to heat the solution of the evaporation pond to a high temperature but to increase the temperature of the solution by about 10 ° C to 20 ° C. From the result of FIG. 7, .

That is, it is possible to improve the evaporation amount sufficiently by the heating method using the sunlight, and it is possible to maximize the operating efficiency of the existing evaporation pond without requiring additional mechanical device or heating energy. In addition, the temperature of a part of the solution rises due to the sunlight condensation, and convection occurs due to a temperature interval and an ambient temperature range. The convective phenomenon shows an increase in the amount of convection as the temperature rises by 10 ° C at 20 ° C, and the solution in the evaporation pond is gradually stirred.

The above results can be applied to all evaporation ponds using natural evaporation method. Especially, it is necessary to improve the operation efficiency of evaporation pond for potassium (K), boron (B) and lithium (Li) The effect is great. Since the evaporation pond for the production of potassium (K), boron (B), and lithium (Li) is mostly located in the area after the dryer of the highland area, the heat source equipment of this embodiment, which is simple in structure and simple in maintenance, have.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

100: Heat source facility for evaporation pond 200: Evaporation pond
110: concave mirror 120: pedestal
130: Angle adjusting part 131: Upper support part
132: lower support 133: intermediate support
140: driving part 141: piston
142: driving cylinder 143: connecting arm

Claims (4)

A heat source equipment for an evaporation pond which stores saline water whose surface is exposed to the atmosphere, a sediment layer is located at the bottom, and is arranged in parallel with the east-west direction,
A concave mirror positioned toward the south of the evaporation pond and having a reflecting surface for condensing sunlight toward the settling layer to increase the temperature of the salt water and to cause convection and stirring of the salt water;
A pedestal supporting the concave mirror on the ground; And
And an angle adjusting unit coupled to the concave mirror and the pedestal and adjusting the inclination angle of the concave mirror according to a seasonal change so that the concave mirror tracks the altitude of the sun according to the season,
Wherein the reflective surface has a curved surface set so that the angle of incidence of sunlight with respect to the saline water is maintained at an angle of 30 to 50 from the surface of the saline water, And is directed to the precipitation layer. The method according to claim 1,
Wherein the concave mirror is parabolic in cross section and has a semi-cylindrical structure extending along the east-west direction. The method according to claim 1,
Wherein the angle-
An upper support and a lower support fixed to the rear surface of the concave mirror with a height difference therebetween,
An intermediate support coupled to the upper support and the lower support,
And a driving unit coupled to the intermediate support to rotate the intermediate support. Disposing a concave mirror having a reflective surface on the north side of the evaporation pond, the surface of which is exposed to the atmosphere, the precipitate layer is located on the bottom and the evaporation pond is arranged in parallel with the east-west direction;
A temperature raising step of raising the temperature of the brine by adjusting the converging focus of the reflecting surface to the precipitation layer and simultaneously causing convection and agitation of the brine; And
And an inclination angle adjusting step of adjusting the inclination angle of the concave mirror according to the seasonal change to follow the altitude of the sun according to the season,
Wherein the reflective surface comprises a curved surface configured to maintain an angle of incidence of sunlight with respect to the saline solution at an angle of 30 to 50 degrees from the surface of the saline solution,
Wherein the solar light incident on the brine in the heating step is reflected by the precipitation layer and is reflected under the water surface to the precipitation layer, thereby improving the evaporation rate of the evaporation pond.

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