Water purification means comprising fluorocarbon yarn coated with fluorine

Abstract

To provide water purification means in which fluorocarbon yarn is coated with fluorine.SOLUTION: A width of a clearance II, which is formed by bundling a plurality of "fluorocarbon yarns" made by polymerizing fluorine onto carbon yarns, is made to about 0.9 nm by coating means passed an aqueous hydrogen fluoride solution. Further, processes for "drying and fixing" by heating to about 120°C are alternately "repeated multiple times", and further, "high temperature firing" is performed in a final process. In order to create a subtle space, a concentration of hydrogen fluoride (FH) is decreased as approaching the final process side, and finally, "the concentration of hydrogen fluoride" is made to about zero", and "water is gradually increased and dried each time, and high temperature firing is performed in the final process", whereby one water purification kit with a subtle space having a diameter of 0.9 nm can be created. By connecting of a plurality of kits with the afore-mentioned content, a purification apparatus for purifying sea water and polluted water can be provided.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] Regarding the desalination of contaminated water and seawater. [Background technology]

[0002] Conventional desalination technology involves applying strong pressure to a reverse osmosis membrane to produce fresh water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] [Non-patent literature]

[0004] [Non-Patent Document 1] According to a pre-release by a research group at the University of Tokyo, a tube made from a macrocyclic compound with tightly bound fluorine atoms has been found to have a water permeability 4,500 times greater than that of aquaporins, which were previously considered the best for removing salt from seawater, while still blocking salt. Summary of the Invention [Problem to be solved by the invention]

[0005] Aquaporins have attracted attention in the desalination of seawater to date. Aquaporins have tiny holes with an inner diameter of 0.3 nm, just large enough for water molecules to pass through, and have both high water permeability and high salt removal capabilities. The latest prior art technology is a macrocyclic compound developed by a research group at the University of Tokyo, in which fluorine atoms are tightly bonded to the inside. By stacking these compounds in a row using a technique called molecular polymerization, it was possible to obtain a fluorinated nanotube structure with a diameter of 0.9 nm, with an inner wall as dense as Teflon. When the water permeability and salt removal capacity of this nanotube were evaluated, it was found that it had a water permeability 4,500 times that of aquaporins, but was impermeable to salt. However, "it is extremely difficult to produce the above-mentioned fluorinated nanotubes," and they are only occasionally produced. At present, the cost is too high to put them into practical use. [Means for solving the problem]

[0006] The objective of this invention is to overcome the extremely difficult and costly manufacturing challenges mentioned above by providing a means for obtaining the same desalination and removal capabilities as fluorinated nanotubes using a completely different manufacturing method. This method combines and arranges carbon yarn and Teflon coating technology. One manufacturing method involves passing an aqueous hydrogen fluoride solution through the gaps in a fabric woven with carbon yarn, followed by multiple drying processes, and then in the final process, baking the fabric at a high temperature to create a multi-layer structure with gaps of approximately 0.9 nm. This is the basic invention of a purification device for purifying seawater and polluted water.

[0007] Currently available carbon and fluorocarbon yarns range in thickness from 500μ to 5μm, and the thickness of the yarn used in this patent is "thicker." The fibers are available in plain weave, twill weave, and satin weave, and although any of these would be acceptable, this proposal will use "plain weave" for explanation. The diameter of the fluorinated nanotube structure is 0.9nm, so the gaps in the plain weave are significantly larger. A primer coat may be applied to the carbon yarn to coat it with hydrogen fluoride. Alternatively, a plain weave fabric made of "fluorocarbon yarn (polytetrafluoroethene)," a polymer of carbon yarn and fluorine, may be used instead of carbon yarn. Next, a plain weave fabric made of carbon fiber is passed through an aqueous hydrogen fluoride solution, then "heated to around 120°C and dried, and in the final process, "high-temperature fired," which fixes the fluorine, reducing the gaps in the fabric to about 0.9 nm.The fluorine-coated fabric is then "high-temperature burned in the final process," creating spaces of 0.9 nm.This fluorine-coated "wide plain weave carbon fluoride fabric" is then "cut to an appropriate size," and "one kid" with a "layered structure" is then passed through "multiple water purifiers" to produce purified fresh water, using seawater or contaminated water. [Effects of the Invention]

[0008] It has been publicly announced that a macrocyclic compound with tightly bound fluorine atoms has 4,500 times the water permeability of aquaporins used for purifying seawater, as a water purification function, by the Graduate School of Engineering at Tokyo University. This invention is a fundamental invention that can purify seawater or polluted water more cheaply by taking the water permeability of fluorine discovered by the University of Tokyo and coating the gaps in fluorocarbon yarn fabric with fluorine to create a structure equivalent to that of a macrocyclic compound with tightly bound fluorine atoms. [Brief explanation of the drawings]

[0009] [Figure 1] This is the structural formula of fluorocarbon yarn. [Figure 2] FIG. 1 is a diagram of a plain weave of carbon or fluorocarbon yarns. [Figure 3] This is a diagram showing multiple kits of plain woven carbon or fluorocarbon yarns. [Figure 4] FIG. 1 is an explanatory diagram of the supply of pure water and hydrogen fluoride from supply hoses A and B. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Example]

[0011] The basic structure of this invention is that gaps (spaces) are created when "bundling carbon threads" or "weaving carbon threads," and rather than filling these "gaps" 100%, the effect of polymerizing fluorine (F) as a material to create spaces with a diameter of around 0.9 nm makes it possible to turn seawater or final contaminated water into fresh water. This is a basic patent for a water purification system that is easy to manufacture and inexpensive, rather than forming fluorinated nanotubes, which are difficult to manufacture.

[0012] After "coating the carbon yarn with a coating primer," or after passing a hydrogen fluoride solution through the gaps in the carbon yarn fabric (1), the fabric is heated to approximately 120°C and dried multiple times. The gaps are then "high-temperature fired" in the final process, resulting in a layered structure (2). Contaminated water or seawater can be desalined by passing multiple layers of this fabric through a water purifier. Alternatively, instead of carbon yarn fabric, a "fluorocarbon yarn fabric" in which fluorine is polymerized onto the carbon yarn from the beginning can be used, and a hydrogen fluoride solution can be passed through the gaps in the initial process to create a 0.9 nm gap diameter. Coating multiple plain-woven fabrics at once is more efficient, but in this case, the weaves must be "aligned." Furthermore, to perform each step of the coating process on multiple layers (2 to 10) of fabric at once, the weaves must be "aligned." Figure 1 shows the structural formula of fluorocarbon yarn. FIG. 2 is an explanatory diagram of a plain weave fabric of carbon yarn.

[0013] In the initial process of creating the 0.9 nm diameter spaces covered with fluorine, the fabric is either "immersed" in a hydrogen fluoride solution diluted with water, or "passed through a hydrogen fluoride solution through a plain weave fabric," followed by drying at 120°C. In the later process, the plain weave fabric is passed through a hydrogen fluoride solution. Then, in the "final process, high-temperature combustion" is performed to create a 0.9 nm space, and a single fluorine-coated "wide fluorocarbon plain weave fabric" is "cut to an appropriate size" and "layered" to create a single kit (2). Multiple such kits are stratified to form a water purifier. To create the minute spaces in the water purifier, the hydrogen fluoride (FH) concentration is reduced toward the final process, ultimately "reducing the hydrogen fluoride concentration to near zero," "gradually increasing the amount of water used, drying each time, and then performing high-temperature firing in the final process," thereby creating minute 0.9 nm diameter spaces. FIG. 3 is an explanatory diagram showing a series of multiple kits with the contents of 0012. [Example]

[0014] In the two examples above, nanobubbles were generated in the hydrogen fluoride solution to facilitate fluorine fixation on the carbon yarn and fluorocarbon yarn. This utilizes the bubbles' tendency to attach to nearby objects, making it easier for fluorine to attach to the yarn. However, the bubbles also have the opposite effect of removing impurities. Therefore, during the initial phase of supplying the hydrogen fluoride solution from the hydrogen fluoride solution supply hose A (3), which generates nanobubbles in the solution, and the hydrogen fluoride solution supply hose B (4), the hydrogen fluoride solution was first flowed from the hydrogen fluoride solution supply hose A (3), which generates nanobubbles in the solution, and then from the hydrogen fluoride solution supply hose B (4), followed by a drying process. As the process progressed, the flow rate of the supply hose A (3), which generates nanobubbles, was reduced to zero. After this, drying at 120°C was repeated for each phase in which the hydrogen fluoride solution was flowed from the hydrogen fluoride solution supply hose B (4) alone. Finally, a "high-temperature baking" process was performed in the final phase. FIG. 6 is a diagram illustrating the supply of the hydrogen fluoride aqueous solution through supply hose 1 and supply hose B, and the supply ratio of pure water and hydrogen fluoride. [Industrial Applicability]

[0014] To convert the ballast water of large cargo ships into freshwater instead of seawater and supply it to countries with water shortages, as well as coastal cities and islands, technology is needed to convert seawater into freshwater as quickly as possible. It can also "contribute to securing large quantities of water for semiconductor manufacturing." [Explanation of symbols]

[0015] (1) Gap (2) Layered structure (3) Supply hose A (4) Supply hose B

Claims

1. A water purification means in which a fluorine-coated carbon fluorocarbon yarn fabric is coated with fluorine, characterized in that the fabric is woven with carbon yarn, and the gaps I (1) are subjected to a process of passing an aqueous hydrogen fluoride solution through the gaps and then drying the fabric multiple times, and then the fabric is baked at a high temperature in the final process, resulting in a gap width of approximately 0.9 nm.The fabric is then layered and connected together to form a single kit (2).

2. 2. The water purifying means according to claim 1, wherein the carbon yarn is replaced with a fluorocarbon yarn.

3. The water purification means is a fluorine-coated carbon fluoride yarn product, characterized in that the fluorine-coated carbon fluoride yarn product is made by bundling carbon fluoride yarns having a length of 10 cm or less together, lowering the air pressure on one of both ends (4) of the gaps II (3) formed by bundling the yarns, and alternately passing an aqueous hydrogen fluoride solution through the gaps to dry them. This process is repeated multiple times, and the yarns are then baked at a high temperature in the final step. This results in multiple bundles of kid bundles (5) with a gap width of approximately 0.9 nm.

4. 4. A water purifying means comprising a fluorine-coated fluorocarbon yarn material according to claim 1, 2 or 3, characterized in that a coating means of a fluorine coating primer is applied to the surface of the carbon yarn or fluorocarbon yarn.

5. Regarding the ratio of water to hydrogen fluoride in the hydrogen fluoride aqueous solution, the coating method for the gaps of the fluorocarbon yarn is such that the amount of water is increased and the amount of hydrogen fluoride is decreased in the later stages of the processing steps, and in the final step, ２ 5. A water purifying means comprising a fluorine-coated carbon fluoride yarn according to claim 1, wherein the amount of hydrogen fluoride relative to O is nearly zero.

6. 6. A water purification means comprising a fluorine-coated carbon fluoride yarn according to claim 1, characterized in that, with regard to the supply of the hydrogen fluoride solution from the hydrogen fluoride solution supply hose I (6) that generates nanobubbles in the liquid and the hydrogen fluoride solution supply hose II (7), a process of first flowing the hydrogen fluoride solution containing nanobubbles from supply hose I (6) and then flowing only the hydrogen fluoride solution from supply hose II (7) and drying the solution is repeated only in the initial stage, and as the process approaches an intermediate stage, only the supply hose I (6) that generates nanobubbles is throttled to zero, and thereafter the hydrogen fluoride solution is supplied only using the hydrogen fluoride solution supply hose II.

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