JP4195457B2 - Seawater concentrator - Google Patents

Description

  The present invention relates to an apparatus for obtaining concentrated seawater as a salt production raw material.

  Conventionally, various systems have been proposed as devices for concentrating seawater as a salt production raw material.

For example, Patent Document 1 describes that seawater is atomized and water is evaporated by applying warm air to the seawater to crystallize salt, and Patent Document 2 discloses a flame-heated rotary drum. Is provided in a plurality of stages, and the seawater concentrated in the previous stage is sprayed on the surface of the rotating drum in the next stage to evaporate the water and sequentially concentrate the seawater. Describes a method in which a rotating annular net immersed and circulated in seawater is placed in a greenhouse using natural sunlight, and the seawater adhering to the rotating annular net is dried using wind power. Patent Document 4 describes a method of suspending a large number of branch-type evaporators on a ceiling, pouring seawater into the suspension, and concentrating while circulating seawater flowing down from the evaporator, and further, Patent Documents 5 is the middle space of the double-structure rotor By flowing seawater, it is described as the method to promote the evaporation of water in the seawater.
International Publication No. 98/35911 JP 2000-228964 A JP 2001-114513 A JP 2002-167217 A JP 2002-356324 A

  Among the conventionally proposed seawater concentrators, those described in Patent Document 3 basically use wind power as a power source for rotating the ring net, and use wind power together with solar heat as a source of evaporation of seawater moisture. It is excellent in terms of energy saving.

  However, since the annular net rotates in the vertical direction while immersed in seawater, it is not possible to obtain a driving force for rotation with ordinary wind power, and the evaporation of water in the seawater attached to the net is not possible. Therefore, there are many problems to be solved for practical use, such as inadequate wind perception.

  The first object of the present invention is to put a seawater concentrator using natural wind power and solar heat into practical use, and to achieve high efficiency in seawater concentration at a low cost.

  Another problem is to provide a seawater concentrator that minimizes the effects of weather.

  Furthermore, the other subject exists in the realization of reduction of the construction cost and operating cost of the said seawater concentrator.

  The present invention arranges a rotating body attached to a vertical rotating shaft that rotates using natural energy in a greenhouse, sprays seawater on the rotating body, and rotates the water in the dispersed seawater to rotate the rotating body. A device for concentrating seawater by evaporating by solar heat, wherein the greenhouse has a triangular cross section with an inclined surface for collecting solar heat, and the cross section has a structure in which the top portion of the triangular shape is open to the outside, and By arranging the rotating body directly below the top of the greenhouse, an upward air flow is generated in the greenhouse to promote the vaporization of water in the seawater.

  The inclined surface of the greenhouse preferably has a so-called plastic house shape covered with glass or a synthetic resin sheet having good solar heat collecting property.

  Moreover, it is good to spread seawater from the upper position of the rotary body arrange | positioned perpendicularly | vertically in a greenhouse using the circulation of concentrated seawater.

  Natural energy such as wind power, wind power generation or solar power generation can be used as a drive source for the rotating body provided in the greenhouse.

  When using wind power as a drive source, install a windmill at the open part of the top of the greenhouse and connect the rotating shaft of the windmill directly to the axis of the rotating body, or a method of transmitting rotational force with a gear, etc. Can be used.

  Moreover, as a rotating body to which seawater is attached, a structure in which cloth, a net, or the like is incorporated into a vertical rotating shaft can be used.

  This rotating body has its rotating shaft held vertically, and can be rotated by a relatively small wind, wind power or solar power motor via a bearing, etc. In addition, the temperature distribution in the greenhouse can generate a considerable updraft in the greenhouse, helping to evaporate it.

  By the seawater evaporation apparatus of the present invention, seawater is sprayed from above onto a rotating body having a seawater adhesion function, and the seawater adhering to the wind and atmosphere of the greenhouse generated by the rotation of the rotating body in the process of descending the rotating body Then, moisture is vaporized and concentrated by the rising airflow formed in the greenhouse.

  Moreover, the seawater evaporation apparatus of the present invention can be a continuous processing type in which a plurality of rotating bodies are continuously arranged in a greenhouse and the concentration of seawater is increased stepwise through each rotating body. By making the seawater evaporation apparatus of the present invention a continuous processing type, the amount of seawater to be processed is increased, and the concentration efficiency of seawater is markedly improved. At that time, the rotating bodies may be arranged in series, or any arrangement such as a U-shape may be adopted.

  The seawater concentrator of the present invention basically uses only solar heat and natural wind to form an updraft in the greenhouse, which can concentrate seawater with high efficiency, and stably stabilize a large amount of seawater with small equipment. It becomes possible to concentrate.

  Hereinafter, an embodiment of the seawater concentration device of the present invention will be described based on an example in which a plurality of rotating bodies rotating by a windmill are arranged.

  FIG. 1 is a view of a whole view of a building A provided with a seawater concentration device 10 in which four rotating bodies 1 are arranged in series, as seen from the side, partially in cross section, and FIG. 2 is a building shown in FIG. It is the figure which looked at the rotary body 1 arranged in A from the upper direction.

  B is a maintenance work staircase arranged on one side of the building A, and the staircase is connected to a maintenance corridor C provided on the side of the building A.

  FIG. 3 shows the seawater concentrator 10 by a cross section taken along line XX of FIG.

  In the figure, a building A has a triangular roof structure formed by a beam material F, and its lower inner surface is lined with a heat-permeable material 21 such as glass or vinyl, and is heated to an equivalent temperature by solar heat. A warming greenhouse 2 is formed.

  In the center of the building A, a bearing base 3 of a rotating body is formed, and on both sides of the building A, a seawater reservoir 4 forming a part of an inclined conduit for circulating the concentrated seawater shown in FIG. Is formed. Furthermore, a discharge path 5 is formed on the outer side for discharging water in which water generated by vaporization and evaporation from seawater descends along the inner wall of the greenhouse 2.

  E1 to E3 are upper frames of the building A, and form an upper part of the greenhouse whose section has a triangular apex, and an open space that communicates with the outside air is formed in this part.

  A rotating shaft 6 for the rotating body 1 is vertically arranged just below the upper part of the greenhouse whose section is the apex of the triangle, and is arranged vertically on the bearing stand 3 through a gear and other connecting rotating members 61. Has been.

  The rotating body 1 is formed by attaching a tubular body made of a cloth or a net such as a net, which temporarily holds the scattered seawater, to the arm 7 of the vertical rotating shaft 6.

  Reference numeral 8 denotes a windmill having a plurality of blades 81 attached to an open portion above a greenhouse whose section has a triangular apex. The rotational driving force by the windmill 8 rotationally drives the vertical rotating shaft 6 of the rotating body 1 through a rotational force transmitting means such as an arbitrary gear. In the illustrated case, the rotating shaft of the windmill 8 and the vertical rotating shaft 6 of the rotating body are directly connected, but it is desirable to increase the effect of transmitting the rotational force of the windmill 8 by gear coupling.

  Reference numeral 9 denotes a seawater spraying device that sucks concentrated seawater from the seawater reservoir 4 and sprays it on the rotating body 1 from above, and can utilize the rotation of a windmill 8 (not shown).

  As shown in FIG. 1 and FIG. 2, in the example in which four rotating bodies are continuously arranged, when the seawater introduced into the seawater reservoir 4 is pumped from the outside and dispersed on the rotating body 1 rotated by the windmill 8. The water of the seawater adhering to the rotating body 1 is volatilized by the temperature in the greenhouse and the rising airflow generated in the greenhouse, and the seawater W scattered by the rotation of the rotating body 1 and adhering to the inner wall of the greenhouse is along the wall surface. The seawater that flows down and remains in the rotator 1 flows down into the seawater reservoir 4 by the seawater that is scattered. By repeating this for each rotating body 1, the salinity of the seawater in the seawater reservoir 4 increases with the downstream flow.

  And when the seawater which concentrated the salt content in this way becomes a fixed salt concentration, it supplies to the salt production equipment of the next step.

  The operating conditions of the seawater concentrator shown in the above figures are shown below.

  Rotating body 1 rotating at a speed of 15 rpm on a rotating body 1 having a height of 5500 mm, a diameter of 4000 mm, and a length of 4 m, which is disposed in a greenhouse having an inner height of 7 m, a width of 12 m, and an upper temperature of 28 ° C. Above, the initial seawater with a salt content of 3.5% and a temperature of 23 ° C. stored in the seawater reservoir 4 was sucked up by the seawater spraying device 9 and sprinkled at a rate of 10 liters / minute.

  In FIG. 3, an updraft is generated as indicated by an arrow Z, and the evaporated water becomes water droplets as indicated by an arrow W, which is drained as a flow in a drain along the inner wall of the greenhouse. I was able to confirm.

  At this first stage, the sprayed seawater descended the rotating body 1, and it was confirmed that concentrated seawater with a salt content of 4% was stored in the next seawater reservoir at a rate of 8.74 liters / minute.

  Concentration of 0.5% was confirmed for each of these rotating bodies, and the concentration of the seawater in a system in which four rotating bodies were continuously deployed was confirmed by the continued concentration.

The side view of the building which has arranged the seawater concentration device of the present invention is shown. The top view of FIG. 1 is shown. It is a figure which shows the structure of the seawater concentration apparatus of this invention by the cross section by the XX line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating body 2 Greenhouse 21 Heat permeable material 3 Rotating bearing stand 4 Seawater pool 5 Drainage channel 6 Vertical rotating shaft 61 Rotating body bearing 7 Connecting arm 8 Windmill 81 Windmill blade 9 Seawater spraying device 10 Seawater concentrator A Building

Claims (3)

A rotating body that is attached to a vertical rotating shaft that rotates using natural energy in a greenhouse and that has a cloth and net is placed. Sprinkle seawater on this rotating body and rotate the water in the dispersed seawater to rotate the rotating body. A device that concentrates seawater by evaporating with solar heat,
The greenhouse is composed of a triangular roof structure whose top of the cross section is open to the outside, and a lower inner surface of a building lined with a heat-permeable material such as glass or vinyl,
Immediately below the top of the building is a bearing base for the rotating body, and on both sides of the building is formed a seawater reservoir that forms part of an inclined conduit for the circulation of concentrated seawater. On the outside, a drainage path is formed for moisture generated by evaporation and evaporation from seawater to fall along the inner wall of the building and discharge it,
The rotating body is a seawater concentrating device in which concentrated seawater is circulated and sprayed from above in a greenhouse . The seawater concentration apparatus according to claim 1, wherein a plurality of the rotating bodies are continuously arranged in a greenhouse, and the continuous seawater concentration apparatus is configured to gradually increase the seawater concentration through each rotating body . When wind power is used as a drive source, a wind turbine is provided in an open part of the top of the building with the outside, and the rotating shaft of the wind turbine is directly connected to the shaft of the rotating body, or the rotational force is transmitted by a gear. The seawater concentration apparatus according to claim 1.

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