Chemistry: physical processes – Physical processes – Crystallization
Reexamination Certificate
1999-07-30
2002-12-31
Nguyen, Ngoc-Yen (Department: 1754)
Chemistry: physical processes
Physical processes
Crystallization
C023S298000, C023S30200R, C023S29500G, C203S010000, C203S090000, C203S048000, C159S048100, C159S045000, C159S004010, C159S004100, C423S499400
Reexamination Certificate
active
06500216
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and apparatus for producing natural salt by treating sea water.
2. Description of Related Art
According to a currently known method of producing natural salt, a number of pieces of bamboo with branches are hung upside down in a tower formed by piling up blocks, sea water is sprinkled from thereabove and water is evaporated by wind and solar heat while flowing down on the surface of bamboo by which sea water is condensed and water is evaporated on evaporating shelves for three through seven days, thereafter, brine is moved to crystallizing shelves of a green house type and salt is crystallized. Successively, the brine is separated into salt and bittern. According to the salt production process, there is provided an advantage in which compared with a process of boiling it in a kettle, various rare substances are not changed in respect of the qualities or vanished by intense heat.
Meanwhile, as a process of producing drinking water artificially from sea water, there has been known a desalination apparatus by a reverse osmosis membrane process which is used in a district having a small amount of rainfall or a district having a small number of dams.
According to the salt producing process mentioned above, salt component is crystallized over a number of days and therefore, the efficiency is poor and the process is not suitable for mass production. As a result, expensive natural salt is brought about.
Further, according to the process of producing fresh water from sea water by the reverse osmosis membrane process, a very complicated and high degree of technology is required and the installation cost becomes high. Further, the efficiency is poor and the process is not suitable for mass production of fresh water.
It is the technological problem of the invention to realize a treating method and a treating apparatus of sea water capable of producing natural salt with no need of an expensive equipment, in an extremely short period of time and efficiently by paying attention to such problems.
SUMMARY OF THE INVENTION
The technical problem of the invention is revolved by the following means.
Invention according to a first through a seventh aspect relates to a method of treating sea water for producing salt by means of atomizing sea water by rotating a centrifugal generator and of evaporating a water component to crystallize the salt by blowing warm wind thereto, wherein between a treating chamber and an outflow portion for the evaporated water component there is arranged at least one of net and cloth in one stage or a plurality of stages, the salt component is adhered to at least one of the net and the cloth when the evaporated water component passes through at least one of the net and the cloth, and thereafter the adhered salt component is peeled and dropped from at least one of the net and cloth.
When the net and the cloth are respectively used in a plurality of stages, the respective nets and cloths may be directly overlapped or may be spaced with an interval being kept therebetween. Further, also when both the net and the cloth are used, they may be mutually overlapped or may be spaced. In this case, either may be laid above.
When sea water is atomized in this way, innumerable small particles of sea water are composed and therefore, the surface area in contrast to the volume becomes large and vaporization of the water component is facilitated. As a result, vaporization of the water component from the salt crystal can efficiently be carried out. Further, warm wind is blown thereto and therefore, vaporization of the water component is expedited by thermal energy and wind and natural salt can inexpensively be produced. Further, sea water is brought into very fine mist and therefore, natural salt having very fine particles can be provided. Distilled water can be recovered and utilized as fresh water. Accordingly, at least one or both of fresh water and salt can be produced.
Particularly, between the treating chamber and the outflow portion of the evaporating water component there is arranged at least one of net (first screen) and cloth (second screen) is arranged in one stage or a plurality of stages and accordingly, when the evaporated component passes through at least one of the net and the cloth, the salt component is prevented from passing therethrough and is adhered to at least one of the net and the cloth. Here, within the context of the present invention, the phrase of “at least one of net and cloth” is used to mean either (1) net, (2) cloth, or (3) net and cloth. The cloth (second screen) has a mesh size smaller than that of the net (first screen).
As a result, it is possible to prevent the salt component separated from the water component and the condensed sea water from being discharged wastefully. Further, the salt component and the condensed sea water are hampered by at least one of the net and the cloth to suppress discharges therefrom. Therefore, an amount of the salt component contained in the discharged water component is reduced and accordingly, water obtained becomes more resembled to fresh water.
And, since the salt component adhered to the net and the cloth is peeled and dropped therefrom, only the salt component is efficiently recovered and mass-production of salt becomes possible.
According to the second aspect of the invention, there is provided a method of treating sea water according to the first aspect, wherein at least one of the net and the cloth is made to hang on a side portion of the treating chamber and the salt component is adhered thereto.
In this way, according to the method wherein at least one of the net and the cloth is made to hang also on a side portion of the treating chamber and the salt component is adhered thereto, also the salt component floating in the vicinity of a side wall of the treating chamber is adhered to the net and the cloth, so that salt is produced more efficiently by peeling and dropping the adhered salt component.
According to the third aspect, there is provided the method of treating sea water according to the first or second aspect, wherein a number of strings are made to hang on a lower side of at least one of the net and the cloth and the salt component is adhered to the number of strings. In this way, when a number of strings are made to hang below the net or the cloth for preventing the salt component from passing through without stopping and the salt component is adhered thereto, salt crystal can be provided before reaching the net or the cloth and by knocking or shaking the number of strings or knocking or shaking them after collecting them to one place, the salt component can easily be collected to one place.
According to the fourth aspect, there is provided the method of treating sea water according to the second aspect or the third aspect, wherein the salt component adhered to at least one of the net and the cloth is recovered by washing off the salt component by sea water or by other method. Further, in respect of a method of separating the salt component adhered onto at least one of the net and the cloth from the net or the cloth, there can be provided a method of knocking, shaking it down by applying vibration other than a method of washing it off by sea water.
In this way, when the salt component or the condensed sea water adhered to the net or the cloth by being prevented from passing therethrough can be recovered in the treating chamber when it is washed off or shaken off by spraying sea water and accordingly, the salt component separated from the water component or the condensed sea water can be utilized for salt production and salt production can be carried out efficiently.
According to the fifth aspect of the invention, there is provided a method of treating sea water according to any one of the first through the fourth aspects, wherein the atomization of the sea water is carried out by means of applying a centrifugal force to the sea water by rotating an impeller in which arcuate blades are radially provided in a sp
Muramatsu & Associates
Nguyen Ngoc-Yen
LandOfFree
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