JP2020019676A - Method for obtaining sea brine in salt field, and structure of salt field - Google Patents

Abstract

To provide an efficient method and a structure of a salt field, which reduce a large amount of effort.SOLUTION: In a salt field 1, an impermeable sheet 4 is placed on an inclined surface 3 formed, wherein a sand layer or a pebble layer 5 is formed on the impermeable sheet 4. Sea water is spread on the pebble layer 5 to immerse the pebble layer, and then its water content is vaporized by sunlight to form crystals of salt on a surface of the sand. Thereafter, sea water for dissolving the crystals of salt is spread, and then the sea water flowing on the impermeable sheet 4, in which the crystals of salt are dissolved, is collected as sea brine.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a method of taking brine (brine) in a salt field and a structure of the salt field in a deep-sea beach type salt manufacturing method, which is one of the salt manufacturing methods.

  In a conventional salt production method, a method of taking brine is considered to be a deep-sea type salt field, an incoming-type salt field, or a down-flow type salt field.

In the Agehama-type salt field, the ground above the sea surface is hardened flat with clay, seawater is laid on the laid sand, and concentrated saltwater (brine) is taken using the sand whose moisture has been evaporated by solar heat and wind.
In addition, the Irihama salt field uses the difference in tides to wet the seawater by capillary action, and uses the sand that evaporates the water with solar heat and wind to extract the salt water (brine). .

Then, the down-flow type salt field is a diversion of the entering beach salt field. And the concentrated seawater is dropped and evaporated by wind power to obtain brine.
This down-flowing salt field does not require a large amount of sand to be transported and transported as compared with the above-mentioned floating beach-type salt field and entering beach-type salt field, so that labor is reduced.

JP-A-2002-255543 JP 2004-149339 JP-A-2004-331467 JP 2005-330168A

The deep-flooded beach and the wet-flooded beach use the salt of the beach where water is evaporated by solar heat and wind to collect the salt water (brine), and collect the sand with salt crystals formed on the surface. Further, salt attached to the sand by further applying seawater is dissolved in the seawater to obtain a highly concentrated salt water (brine).
Therefore, it is essential to collect the sand from the salt fields and to re-spread and spread the sand, which requires a large amount of labor.

Although the traditional Shiota method has a touristic element, it is undeniable that it has problems of aging and successors.
Therefore, the present invention aims to reduce such a large labor and provide an efficient method for production and a structure of the salt field.

  The invention of claim 1, which relates to a method of collecting brine in a salt field, is characterized in that, in a salt field in which a sand layer or a pebble layer is formed on a formed slope, seawater is sprayed on the sand layer or the pebble layer to be immersed in the sand or pebble and the water is collected. By evaporating day by day, salt crystals are formed on the surface of sand or pebbles, and then seawater dissolving the crystal salt is sprayed to collect seawater having a high salt concentration flowing on the inclined surface dissolving the crystal salt. It is characterized by watering.

  A second aspect of the invention relating to a method for collecting brine in a salt field is the salt field according to the first aspect, wherein an impermeable sheet is laid on the formed inclined surface, and a sand layer or a pebble layer is formed on the impermeable sheet. And collecting seawater having a high salt concentration flowing over the water-impermeable sheet in which the crystalline salt is dissolved to form brine.

  The invention relating to a method for collecting water in a salt field according to claim 3 is the invention according to claim 1 or 2, wherein a water collecting basin is provided at a central portion of the salt field, and an inclined surface is formed around the water collecting basin as a bottom surface. Then, seawater having a high salt concentration is collected in the catchment basin to form brine.

  According to a fourth aspect of the present invention relating to a method for collecting water in a salt field, in the invention according to the first or second aspect, a groove is provided at an inclined end in which a slope is formed in one direction in the salt field. It is characterized by guiding salty seawater to a catchment basin.

  The invention relating to the structure of the salt field according to claim 5, wherein a water collecting basin leading to the irrigation tank is buried in the central part of the salt basin, the periphery is formed on an inclined surface with the water collecting basin as a bottom surface, and a sand layer is formed on the inclined surface. Is formed.

  The invention relating to the structure of the salt field according to claim 6 is characterized in that, in the invention according to claim 5, a water retaining wall is installed between the water collecting basin and the lower end of the inclined surface so as to be removable.

  The invention related to the structure of the salt field according to claim 7, wherein the slope is formed in one direction in the salt field, a sand layer is formed on the slope, and a groove connected to a catchment basin at the lower end of the slope. Is provided.

  The invention relating to the structure of the salt field according to claim 8 is characterized in that, in the invention according to claim 7, a water stop wall is removably installed between the groove and the lower end of the inclined surface.

  According to a ninth aspect of the invention relating to the structure of a salt field, in the invention according to the sixth or eighth aspect, the height of the water blocking wall is equal to the top of the inclined surface.

  According to a tenth aspect of the invention relating to the structure of a salt field, in the invention according to any one of the fifth to ninth aspects, an impermeable sheet is laid on an inclined surface, and a sand layer is formed on the impermeable sheet. It is assumed that.

  An eleventh aspect of the invention relating to the structure of a salt field is the invention of the tenth aspect, wherein the color of the water-impermeable sheet is black.

  According to a twelfth aspect of the invention relating to the structure of a salt field, in the invention according to any one of the fifth to eleventh aspects, a pebble layer is formed instead of the sand layer.

  Since salt fields are formed on an inclined surface, if seawater is sprayed, the salt crystals formed on the surface of the sand will melt, and the concentrated salty seawater will naturally flow down the inclined surface and be collected to form brine. Demonstrate the effect that can be.

  If a water collecting basin is provided in the center of the salt field, and the water collecting basin is formed as a lower surface and an inclined surface is formed around the water collecting basin, water can be directly received by the water collecting basin, and if the inclined surface is formed in one direction, A groove can be provided at the lower end of the slope to link to the catchment basin, and it is possible to make various salt field structures according to the installation location.

When the water-impermeable sheet is laid on the inclined surface, it is possible to prevent seawater in which the salt crystals are dissolved from seeping into the ground of the inclined surface, and to obtain an effect that water can be obtained without waste.
Further, if the color of the water-impermeable sheet is black, the effect of absorbing solar heat and increasing the temperature to promote the efficient evaporation of sand moisture can be expected.

  Furthermore, by installing the water stop wall at the lower end of the slope so that it can be removed, when seawater is sprayed on the sand layer or pebble layer and immersed in sand or pebble, seawater can not be evenly spread over the entire slope. However, since excess seawater stays at the water stop wall, it has the effect of immersing seawater into the sand or pebbles in places where seawater was not directly scattered by capillary action, making it easier to work even with uneven seawater supply. It can be achieved.

Also, if the height of the water stop wall is equal to the top of the slope, if seawater is supplied up to the height of the water stop wall even if the seawater is biased, the seawater will be immersed in the sand layer or pebble layer on the entire slope. It becomes possible.
The removal of the water barrier does not impede the flow of concentrated salt water for collecting brine.

  Therefore, as before, seawater is scattered in the salt field to evaporate the water in the sun, collect the sand with salt crystals formed on the surface, carry it to Talefune, pour seawater from the top of the Talephne, While melting the salt water to obtain salted seawater, the tarephne is dismantled and the sand inside is returned to the salt field, eliminating the need for maintenance work on the salt field, thereby contributing to a reduction in labor. At the same time, a small number of people can efficiently obtain watering.

It is a top view showing one embodiment of a salt field of the present invention. It is principal part sectional drawing of FIG. It is a top view showing other embodiments of the salt field of the present invention. It is principal part sectional drawing of FIG. It is principal part sectional drawing which shows the other embodiment of the salt field of this invention. It is principal part sectional drawing which shows the other embodiment of the salt field of this invention.

An embodiment of the present invention will be described with reference to the drawings.
The method of the present invention follows the basic steps of the conventional deep-floating beach type salt making, and FIG. 1 provides a water collecting basin in the center of the salt field, and forms an inclined surface around the water collecting basin as a bottom surface. FIG. 2 is a plan view showing an embodiment of a salt field which collects flowing seawater into the catchment basin to form brine, and FIG. 2 is a sectional view of a main part.

The salt field 1 is divided into squares, and a catchment basin 2 is buried in the center.
A gentle slope 3 is formed toward the opposing four sides of the salt field 1 with the four sides of the water collecting basin 2 as the lowest bottom positions.
If a water collecting basin 2 is provided in the center of the salt field 1 and the inclined surface 3 is formed around the water collecting basin 2 as a bottom surface, the generated brine that flows down the inclined surface 3 is received by the water collecting basin 2. Can be.
The section shape of the salt field 1 is not limited to a square.
Further, the inclined surface 3 is preferably formed at an angle of 0.5% to 10%, so that seawater can be immersed in sand or pebbles to be described later, or the seawater with a high concentration of salt can flow down without any trouble.

The inclined surface 3 is preferably formed by solidifying a clay ground, and a water-impermeable sheet 4 is laid on the surface, and is fixed by an appropriate fixing means so as not to be released, floated or shifted from the inclined surface 3. You.
The water-impermeable sheet is, for example, a resin sheet having the corresponding physical properties. If the color is black, it can be expected to absorb solar radiation heat, raise the temperature of sand, and efficiently promote water evaporation.

Further, sand is placed on the water-impermeable sheet 4 at a uniform thickness to form a sand layer 5.
The sand layer is about a few centimeters, and it is possible to follow the conventional example in which the sand is scored in order to increase the surface area of the salt field. Even if fine stones are used instead of sand, the same effect as sand can be obtained. be able to.

On the other hand, the water collecting basin 2 has a horizontal flange portion 21 at the upper end edge, and is connected to the end of the inclined surface 3 of the salt field 1 substantially in a continuous manner, and the seawater of the concentrated salt flowing down flows into the basin body 22. To be introduced.
An endless sand reservoir groove 23 is formed in the horizontal flange portion 21 so as to retain foreign matter such as sand flowing down in seawater or the like.
It may be fixedly installed and formed of concrete or resin.

A step portion 24 is formed in the upper portion of the basin body 22 and a filtration mat 25 is erected to remove foreign matter. Further, a mud recess 26 is provided at the bottom of the basin body 22.
An openable / closable flow passage hole 27 is provided in the lower part of the basin body 22, and the inflowed brackish water flows to the brine storage tank 6 through the distribution pipe 28.
Further, a drain hole 29 for rainwater or the like which is opened when necessary is provided in a lower portion of the basin body 22 and drained from a drain pipe 30.

In addition, in the drawing, a pump 8 for pumping seawater, a seawater storage tank 7, a pump 9A and a water spout 10A for sprinkling seawater to the salt field, a pump 9B and a water spout 10B for sprinkling water from the water storage tank 6 are shown. Is composed.
Spraying of seawater to the salt field 1 can be easily performed by evenly spraying the spray nozzle using the pump pressure.

  Then, in the salt field 1, seawater is sprayed on the sand layer 5 to immerse the seawater in the sand, and the water is evaporated by the sun and wind to form salt crystals on the sand surface, and then the crystal salt is dissolved. Seawater is sprayed to cause the water-impermeable sheet 4 to flow down, and the seawater having a high salt concentration obtained by dissolving the crystal salt is collected in the water collecting basin 2 to form brine.

Since the salt field 1 is formed on the slope 3, if seawater is sprayed, the salt crystals formed on the surface of the sand are dissolved, and the seawater of the concentrated salt naturally flows down the slope 3 and flows down to collect the water. It can be collected in two.
Since the impermeable sheet 4 is laid on the inclined surface 3, it is possible to prevent seawater in which salt crystals are dissolved from seeping into the ground of the inclined surface 3 and collect the water in the water collecting basin 2 without waste. Can be.

  The step of spraying seawater on the sand layer 5 to immerse the seawater in the sand, and evaporating the water by the sun to form salt crystals on the sand surface is carried out by increasing the amount of salt crystals as conventionally performed a plurality of times. It may be formed, or it may be used to spray seawater instead of seawater or to dissolve salt crystals.

FIGS. 3 and 4 show another embodiment, in which the inclined surface 3 of the salt field 1 is formed in one direction, and a groove 11 is provided at the lower end of the inclined surface to link with the water collecting basin 2.
It is possible to make various salt field structures according to the construction site.
In the drawings, the same reference numerals as those used in the description of FIGS. 1 and 2 denote the same parts.

FIG. 5 shows another embodiment, in which a water blocking wall 31 is provided between the catchment basin 2 and the lower end of the inclined surface 3, and FIG. Is installed.
The water stop wall 31 is a frame, and the water stop wall 32 is a form in which opposing long plates are integrated by a connecting member, and is made of resin or wood and is disposed so as to be removable.

When spraying seawater to form salt crystals on the sand layer or pebble layer 5, excess seawater flows down and stays at the water stop walls 31, 32, so that the seawater is not directly sprayed on sand or pebble where the seawater was not scattered. It also has the effect of immersing seawater by capillary action.
If the height of the water blocking walls 31 and 32 is equal to the height of the top of the inclined surface 3, if the seawater is supplied up to the height of the water blocking walls 31 and 32 even if the seawater is biased, the sand layer on the entire surface of the inclined surface 3 is formed. In addition, seawater can be immersed in the pebble layer 5.
The removal of the water stop walls 31 and 32 does not prevent the flow of the concentrated salt water for collecting the brine.

  The technical scope of the present invention described above is not limited to the above-described embodiment, and the scope of the technical idea that is truly intended by the present invention becomes clear from the matters described in the present specification and the drawings. It is widespread throughout.

Reference Signs List 1 salt field 2 catchment basin 3 inclined surface 4 impermeable sheet 5 sand layer 6 irrigation storage tank 7 seawater storage tank 8 pump 9A, 9B pump 10A, 10B water spout 11 groove 22 basin body 23 sand pit 25 filtration mat 27 flow path Holes 31, 32 Water stop wall

  TECHNICAL FIELD The present invention relates to a method of taking brine (brine) in a salt field and a structure of the salt field in a deep-sea beach type salt manufacturing method, which is one of the salt manufacturing methods.

  In the conventional salt production method, a method of taking brine is considered to be a deep-sea type salt field, an in-line type salt field, a flowing down type salt field, or the like.

In the Agehama-type salt field, the ground above the sea surface is hardened flat with clay, seawater is laid on the laid sand, and concentrated saltwater (brine) is taken using the sand whose moisture has been evaporated by solar heat and wind.
In addition, the Irihama salt field uses the difference in tides to wet the seawater by capillary action, and uses the sand that evaporates the water with solar heat and wind to extract the salt water (brine). .

Then, the down-flow type salt field is a diversion of the entering beach salt field, in which seawater is poured into a salty field that is made up of clay and loosely sloped to evaporate and concentrate water. And the concentrated seawater is dropped and evaporated by wind power to obtain brine.
This down-flowing salt field does not require a large amount of sand to be transported and transported as compared with the above-mentioned floating beach-type salt field and entering beach-type salt field, so that labor is reduced.

JP-A-2002-255543 JP 2004-149339 JP-A-2004-331467 JP 2005-330168A

The deep-flooded beach and the wet-flooded beach use the salt of the beach where water is evaporated by solar heat and wind to collect the salt water (brine), and collect the sand with salt crystals formed on the surface. Further, salt attached to the sand by further applying seawater is dissolved in the seawater to obtain a highly concentrated salt water (brine).
Therefore, it is essential to collect the sand from the salt fields and to re-spread and spread the sand, which requires a large amount of labor.

Although the traditional Shiota method has a touristic element, it is undeniable that it has problems of aging and successors.
Therefore, the present invention aims to reduce such a large labor and provide an efficient method for production and a structure of the salt field.

The invention according to claim 1 relating to a method of collecting brine in a salt field, wherein in a salt field in which a sand layer or a pebble layer is formed on a formed slope, an impermeable sheet is laid on the formed slope, and a sand layer or a sand layer is formed on the water-impermeable sheet. A salt field with a pebble layer formed thereon, seawater is sprayed on the sand layer or the pebble layer, immersed in the sand or pebble, and the moisture is evaporated by the sun to form salt crystals on the surface of the sand or pebble. It is characterized in that seawater in which the crystal salt is dissolved is sprayed, and seawater having a high salt concentration flowing on the water-impermeable sheet in which the crystal salt is dissolved is collected to form brine.

The invention relating to a method for collecting water in a salt field according to claim 2 is the invention according to claim 1 , wherein a water collecting basin is provided at a central portion of the salt field, and an inclined surface is formed around the water collecting basin as a bottom surface. It is characterized in that seawater having a high salt concentration is collected in the catchment basin to form brine.

A third aspect of the invention relating to a method for collecting water in a salt field is the invention according to the first aspect, wherein the salt field is provided with a groove at an inclined end in which a slope is formed in one direction. The seawater is guided to the catchment basin.

The invention relating to the structure of the salt field according to claim 4 is that the water collecting basin leading to the irrigation tank is buried in the central part of the salt basin, the water collecting basin is formed as a bottom surface, and the periphery is formed on an inclined surface, And a sand layer formed on the water-impermeable sheet.

The invention relating to the structure of the salt field according to claim 5 is the invention according to claim 4 , characterized in that a water retaining wall is installed between the water collecting basin and the lower end of the inclined surface so as to be removable.

The invention relating to the structure of the salt field according to claim 6 , wherein the slope is formed in one direction in the salt field, an impermeable sheet is laid on the slope , and a sand layer is formed on the impermeable sheet , A groove connected to a water collecting basin is provided at a lower end of the inclined surface.

The invention relating to the structure of the salt field according to claim 7 is the invention according to claim 6 , characterized in that a water blocking wall is installed between the groove and the lower end of the inclined surface so as to be removable.

The invention relating to the structure of the salt field according to claim 8 is the invention according to claim 5 or 7 , characterized in that the height of the water blocking wall is equal to the top of the inclined surface.

A ninth aspect of the invention relating to the structure of a salt field is the invention according to the fourth to eighth aspects, wherein the color of the impermeable sheet is black.

According to a tenth aspect of the invention relating to the structure of a salt field, in the inventions of the fourth to ninth aspects, a pebble layer is formed instead of the sand layer.

  Since salt fields are formed on an inclined surface, if seawater is sprayed, the salt crystals formed on the surface of the sand will melt, and the concentrated salty seawater will naturally flow down the inclined surface and be collected to form brine. Demonstrate the effect that can be.

  If a water collecting basin is provided in the center of the salt field, and the water collecting basin is formed as a lower surface and an inclined surface is formed around the water collecting basin, water can be directly received by the water collecting basin, and if the inclined surface is formed in one direction, A groove can be provided at the lower end of the slope to link to the catchment basin, and it is possible to make various salt field structures according to the installation location.

When the water-impermeable sheet is laid on the inclined surface, it is possible to prevent seawater in which the salt crystals are dissolved from seeping into the ground of the inclined surface, and to obtain an effect that water can be obtained without waste.
Further, if the color of the water-impermeable sheet is black, the effect of absorbing solar heat and increasing the temperature to promote the efficient evaporation of sand moisture can be expected.

  Furthermore, by installing the water stop wall at the lower end of the slope so that it can be removed, when seawater is sprayed on the sand layer or pebble layer and immersed in sand or pebble, seawater can not be evenly spread over the entire slope. However, since excess seawater stays at the water stop wall, it has the effect of immersing seawater into the sand or pebbles in places where seawater was not directly scattered by capillary action, making it easier to work even with uneven seawater supply. It can be achieved.

Also, if the height of the water stop wall is equal to the top of the slope, if seawater is supplied up to the height of the water stop wall even if the seawater is biased, the seawater will be immersed in the sand layer or pebble layer on the entire slope. It becomes possible.
The removal of the water barrier does not impede the flow of concentrated salt water for collecting brine.

  Therefore, as before, seawater is scattered in the salt field to evaporate the water in the sun, collect the sand with salt crystals formed on the surface, carry it to Talefune, pour seawater from the top of the Talephne, While melting the salt water to obtain salted seawater, the tarephne is dismantled and the sand inside is returned to the salt field, eliminating the need for maintenance work on the salt field, thereby contributing to a reduction in labor. At the same time, a small number of people can efficiently obtain watering.

It is a top view showing one embodiment of a salt field of the present invention. It is principal part sectional drawing of FIG. It is a top view showing other embodiments of the salt field of the present invention. It is principal part sectional drawing of FIG. It is principal part sectional drawing which shows the other embodiment of the salt field of this invention. It is principal part sectional drawing which shows the other embodiment of the salt field of this invention.

An embodiment of the present invention will be described with reference to the drawings.
The method of the present invention follows the basic steps of the conventional deep-floating beach type salt making, and FIG. 1 provides a water collecting basin in the center of the salt field, and forms an inclined surface around the water collecting basin as a bottom surface. FIG. 2 is a plan view showing an embodiment of a salt field which collects flowing seawater into the catchment basin to form brine, and FIG. 2 is a sectional view of a main part.

The salt field 1 is divided into squares, and a catchment basin 2 is buried in the center.
A gentle slope 3 is formed toward the opposing four sides of the salt field 1 with the four sides of the water collecting basin 2 as the lowest bottom positions.
If a water collecting basin 2 is provided in the center of the salt field 1 and the inclined surface 3 is formed around the water collecting basin 2 as a bottom surface, the generated brine that flows down the inclined surface 3 is received by the water collecting basin 2. Can be.
The section shape of the salt field 1 is not limited to a square.
Further, the inclined surface 3 is preferably formed at an angle of 0.5% to 10%, so that seawater can be immersed in sand or pebbles to be described later, or the seawater with a high concentration of salt can flow down without any trouble.

The inclined surface 3 is preferably formed by solidifying a clay ground, and a water-impermeable sheet 4 is laid on the surface, and is fixed by an appropriate fixing means so as not to be released, floated or shifted from the inclined surface 3. You.
The water-impermeable sheet is, for example, a resin sheet having the corresponding physical properties. If the color is black, it can be expected to absorb solar radiation heat, raise the temperature of sand, and efficiently promote water evaporation.

Further, sand is placed on the water-impermeable sheet 4 at a uniform thickness to form a sand layer 5.
The sand layer is about a few centimeters, and it is possible to follow the conventional example in which the sand is scored in order to increase the surface area of the salt field. Even if fine stones are used instead of sand, the same effect as sand can be obtained. be able to.

On the other hand, the water collecting basin 2 has a horizontal flange portion 21 at the upper end edge, and is connected to the end of the inclined surface 3 of the salt field 1 substantially in a continuous manner, and the seawater of the concentrated salt flowing down flows into the basin body 22. To be introduced.
An endless sand reservoir groove 23 is formed in the horizontal flange portion 21 so as to retain foreign matter such as sand flowing down in seawater or the like.
It may be fixedly installed and formed of concrete or resin.

A step portion 24 is formed in the upper portion of the basin body 22 and a filtration mat 25 is erected to remove foreign matter. Further, a mud recess 26 is provided at the bottom of the basin body 22.
An openable / closable flow passage hole 27 is provided in the lower part of the basin body 22, and the inflowed brackish water flows to the brine storage tank 6 through the distribution pipe 28.
Further, a drain hole 29 for rainwater or the like which is opened when necessary is provided in a lower portion of the basin body 22 and drained from a drain pipe 30.

In addition, in the drawing, a pump 8 for pumping seawater, a seawater storage tank 7, a pump 9A and a water spout 10A for sprinkling seawater to the salt field, a pump 9B and a water spout 10B for sprinkling water from the water storage tank 6 are shown. Is composed.
Spraying of seawater to the salt field 1 can be easily performed by evenly spraying the spray nozzle using the pump pressure.

  Therefore, in the salt field 1, seawater is sprayed on the sand layer 5 to immerse the seawater in the sand, the water is evaporated by the sun and wind to form salt crystals on the sand surface, and then the crystal salt is dissolved. Seawater is sprayed to cause the water-impermeable sheet 4 to flow down, and the seawater having a high salt concentration obtained by dissolving the crystal salt is collected in the water collecting basin 2 to form brine.

Since the salt field 1 is formed on the slope 3, if seawater is sprayed, the salt crystals formed on the surface of the sand are dissolved, and the seawater of the concentrated salt naturally flows down the slope 3 and flows down to collect the water. It can be collected in two.
Since the impermeable sheet 4 is laid on the inclined surface 3, it is possible to prevent seawater in which salt crystals are dissolved from seeping into the ground of the inclined surface 3 and collect the water in the water collecting basin 2 without waste. Can be.

  The step of spraying seawater on the sand layer 5 to immerse the seawater in the sand, and evaporating the water by the sun to form salt crystals on the sand surface is carried out by increasing the amount of salt crystals as conventionally performed a plurality of times. It may be formed, or it may be used to spray seawater instead of seawater or to dissolve salt crystals.

FIGS. 3 and 4 show another embodiment, in which the inclined surface 3 of the salt field 1 is formed in one direction, and a groove 11 is provided at the lower end of the inclined surface to link with the water collecting basin 2.
It is possible to make various salt field structures according to the construction site.
In the drawings, the same reference numerals as those used in the description of FIGS. 1 and 2 denote the same parts.

FIG. 5 shows another embodiment, in which a water blocking wall 31 is provided between the catchment basin 2 and the lower end of the inclined surface 3, and FIG. Is installed.
The water stop wall 31 is a frame, and the water stop wall 32 is a form in which opposing long plates are integrated by a connecting member, and is made of resin or wood and is disposed so as to be removable.

When spraying seawater to form salt crystals on the sand layer or pebble layer 5, excess seawater flows down and stays at the water stop walls 31, 32, so that the seawater is not directly sprayed on sand or pebble where the seawater was not scattered. It also has the effect of immersing seawater by capillary action.
If the height of the water blocking walls 31 and 32 is equal to the height of the top of the inclined surface 3, if the seawater is supplied up to the height of the water blocking walls 31 and 32 even if the seawater is biased, the sand layer on the entire surface of the inclined surface 3 is formed. In addition, seawater can be immersed in the pebble layer 5.
The removal of the water stop walls 31 and 32 does not prevent the flow of the concentrated salt water for collecting the brine.

  The technical scope of the present invention described above is not limited to the above-described embodiment, and the scope of the technical idea that is truly intended by the present invention becomes clear from the matters described in the present specification and the drawings. It is widespread throughout.

Reference Signs List 1 salt field 2 catchment basin 3 inclined surface 4 impermeable sheet 5 sand layer 6 irrigation storage tank 7 seawater storage tank 8 pump 9A, 9B pump 10A, 10B water spout 11 groove 22 basin body 23 sand pit 25 filtration mat 27 flow path Holes 31, 32 Water stop wall

Claims (12)

  In a salt field where a sand layer or a pebble layer is formed on the formed slope, seawater is sprayed on the sand layer or the pebble layer to be immersed in the sand or pebble, the water is evaporated by the sun, and salt crystals are formed on the surface of the sand or pebble. Forming a salt water, and then spraying sea water for dissolving the crystal salt, collecting sea water having a high salt concentration flowing on the inclined surface in which the crystal salt is dissolved, and collecting the sea water to obtain brine. .   An impervious sheet is laid on the formed inclined surface to form a salt field in which a sand layer or a pebble layer is formed on the impermeable sheet, and seawater having a high salt concentration flowing on the impermeable sheet in which the crystalline salt is dissolved is collected. The method for taking water in a salt field according to claim 1, wherein the water is used as water.   A water collecting basin is provided in the center of the salt field, and an inclined surface is formed around the water collecting basin as a bottom surface, and seawater with a high salt concentration is collected in the water collecting basin to form brine. 3. The method for collecting brine in a salt field according to 1 or 2.   A groove is provided at an inclined end in which a slope is formed in one direction in the salt field, and the salt water from the groove is guided to the catchment basin from the groove. How to take water.   A structure of a salt field, wherein a water collecting basin leading to the irrigation tank is buried in the central part of the salt field, that the water collecting basin is formed as a bottom surface, the periphery is formed on an inclined surface, and a sand layer is formed on the inclined surface. .   The structure of the salt field according to claim 5, wherein a water stop wall is installed between the water collecting basin and the lower end of the inclined surface so as to be removable.   A salt field, wherein a slope is formed in one direction in the salt field, a sand layer is formed on the slope, and a groove linked to a catchment basin is provided at a lower end of the slope. Structure.   The structure of a salt field according to claim 7, wherein a water stop wall is installed between the groove and the lower end of the inclined surface so as to be removable.   The structure of a salt field according to claim 6 or 8, wherein the height of the water blocking wall is equal to the top of the inclined surface.   The structure of a salt field according to any one of claims 5 to 9, wherein an impermeable sheet is laid on the inclined surface, and a sand layer is formed on the impermeable sheet.   The structure of the salt field according to claim 10, wherein the color of the water-impermeable sheet is black.   The structure of a salt field according to any one of claims 5 to 11, wherein a pebble layer is formed instead of the sand layer.

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