JP2016132614A - Chlorine dioxide gas generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chlorine dioxide gas generator that wasting before beginning to use is extremely little, manufacturing is easy and simply with cheap cost, can produce chlorine dioxide gas with enough level, and the function is not lost even if it is inclined.SOLUTION: A chlorine dioxide gas generator consists of: a first hydrophilic porous layer 4 having absorbed a first component consisting of chlorite; a second hydrophilic porous layer 3 which can absorb a second component if necessary; and a third hydrophilic porous layer 2 having absorbed a third component consisting of an acidic substance and a buffer for pH. The hydrophilic porous layers 2, 3, 4 are piled up to adhere between face each other, and are comprised so that water 6 can be supplied to the hydrophilic porous layers.SELECTED DRAWING: Figure 5

Description

Detailed Description of the Invention

  The present invention relates to a chlorine dioxide gas generator, and more particularly to a chlorine dioxide gas generator that is easy and simple to manufacture, consumes very little until the start of use, and generates a sufficient concentration of chlorine dioxide gas.

  A composition that generates chlorine dioxide gas is described, for example, in JP-A-11-278808 (Patent Document 1). This composition comprises a chlorine dioxide solution produced by dissolving chlorine dioxide gas in water, a chlorite solution, and a pH adjuster such as citric acid. Moreover, the chlorine dioxide gas generating composition which improved this is described in the patent 5593423 (patent document 2). This composition uses a phosphate-based pH adjuster in place of citric acid so that the pH of the composition is 4.5 to 6.5 and an effective concentration of chlorine dioxide is generated for a longer period of time. It is a thing.

  Such a chlorine dioxide gas generating composition maintains the effective concentration of chlorine dioxide gas by suppressing the reaction that liberates chlorine dioxide. Unavoidable.

  An apparatus for generating chlorine dioxide by dropping an acidic substance onto chlorite from above is described in Japanese Patent Application Laid-Open No. 2000-202010 (Patent Document 3). This equipment is composed of a chlorite container, an acidic substance container, an apparatus (parts) for dropping an acidic substance at a desired rate (speed), its control device, a blower, an air filter to be taken in, and other parts. The structure is complicated and the manufacturing cost is high.

  A chlorine dioxide gas generator (apparatus) having a similar mechanism is described in Japanese Unexamined Patent Application Publication No. 2009-256141 (Patent Document 4). This apparatus consists of a container for gel-stabilized chlorine dioxide, its lid, and a container for acidic substances (granular citric acid). The container and the lid are rotatable with respect to each other, and particulate citric acid is dropped from the container onto the gel-stabilized chlorine dioxide by the vibration generated when the lid is rotated to generate chlorine dioxide gas. This device is much simpler in structure than the device described in Patent Document 3, and can be made at low cost (see Patent Document 4, paragraph [0008]).

  However, in this apparatus of Patent Document 4, it is not easy to arbitrarily adjust the amount of particulate citric acid falling. Moreover, there is a possibility that the granular citric acid may accidentally fall out of the storage part other than during use.

  JP-A-2006-51485 (Patent Document 5) discloses a calcium chloride particle on a perforated plate having a chlorite layer formed at the bottom of a container having an opening at the top and provided at an intermediate height. A container for dehumidification, mold prevention, and deodorization in which an upper layer and a lower layer of a solid organic acid are formed is described. In addition, a layer of calcium chloride particles is formed on a porous plate provided at the intermediate height of the same container, and an upper layer of solid organic acid and a lower layer of chlorite are formed on the bottom of the container, dehumidification, Containers for mold prevention and deodorization are also described.

  However, in the container having such a structure, a layer of particles of various substances is formed on the bottom and the perforated plate. When the container is tilted, the particles are shifted to one side, and the position is kept as it is due to moisture absorption of calcium chloride. It hardens and does not return. In particular, when the particles on the perforated plate are displaced, a part of the perforated plate becomes transparent (no component particles), and the functions of dehumidification, mold prevention, and deodorization are remarkably deteriorated.

  JP-A-11-278808   Japanese Patent No. 5593423   JP 2000-202010 A   JP 2009-256141 A   JP 2006-51485 A

  Therefore, an object of the present invention is to realize a chlorine dioxide gas generating apparatus that can generate chlorine dioxide gas having a sufficient concentration with very little consumption before the start of use.

  Another object of the present invention is to realize a chlorine dioxide gas generator which is easy and simple to manufacture and can be manufactured at a low cost.

  Another object of the present invention is to realize a chlorine dioxide gas generator that does not lose its function even when tilted.

  The object of the present invention is to provide a first hydrophilic porous layer in which the first component is absorbed, a second hydrophilic porous layer in which the second component may be absorbed if necessary, and a third Consists of a third hydrophilic porous layer that has absorbed components, the first component is composed of chlorite, the third component can be acidic, or can impart acidity to the first hydrophilic porous layer Consists of a pH buffer, and the first, second and third hydrophilic porous layers are stacked in order so that they are in close contact with each other, and configured to supply water to any of the hydrophilic porous layers. This is achieved by a chlorine dioxide gas generator.

  The first, second and third porous layers may be flexible and are advantageous when the stacked first, second and third porous layers form a curved surface.

  The superimposed first, second and third porous layers may form a flat surface or a curved surface. The superposed first, second and third porous layers may form at least a part of the cylindrical surface.

  A neutral or weakly alkaline component may be used as the second component. A weak alkaline component having a pH of 7.2 to 9 is suitable.

  As the pH buffering agent, a substance capable of adjusting the pH of the first component to a pH in the range of 3.5 or more and less than 7.0 in the presence of water is advantageous. Particularly advantageous are buffers that allow the pH of the first component to be between 4.5 and 6.5 in the presence of water. It is even more advantageous if the pH buffering agent can make the pH of the first component 4.5 or more and less than 6.0 in the presence of water. As the pH buffering agent, a phosphate, an aliphatic carboxylate (for example, an alkali citrate salt, an alkali succinate), an aliphatic carboxylate (for example, an alkali salt of benzoate), or the like can be used.

  The third component may contain a hygroscopic substance, and as the hygroscopic substance, magnesium chloride, potassium dihydrogen phosphate, calcium lactate, glycerin, polyethylene glycol (especially molecular weight 2000 or less) and the like can be used.

The chlorine dioxide gas generator of the present invention can take the following aspects.
(1) The third porous layer is overlaid so as to be the outermost side.
(2) The first porous layer is exposed to the outside.
(3) The stacked first, second and third porous layers are accommodated in a bowl-shaped container having an opening at the top.
(4) It is configured so that moisture can be supplied from below to at least the third hydrophilic porous layer.

  Unlike the chlorine dioxide gas generating composition of Patent Document 1 or 2, the chlorine dioxide gas generating apparatus of the present invention consumes very little before the start of use. In addition, a sufficient concentration of chlorine dioxide gas can be generated.

  The chlorine dioxide gas generator of the present invention is easy and simple to manufacture and can therefore be manufactured at low cost.

  Unlike the apparatus of Patent Document 5, the chlorine dioxide gas generating apparatus of the present invention has no fear of losing its function even if it is tilted.

  It is the side view and sectional drawing which show the 1st embodiment of the chlorine dioxide gas generator of this invention. 1A is a side view, and FIG. 1B is a cross-sectional view.   It is another sectional view showing the first embodiment of the chlorine dioxide gas generator of the present invention.   It is the side view and sectional drawing which show the 2nd embodiment of the chlorine dioxide gas generator of this invention. 3A is a side view, and FIG. 3B is a cross-sectional view.   It is another sectional drawing which shows the 2nd embodiment of the chlorine dioxide gas generator of this invention.   It is sectional drawing which shows the state at the time of use of the 1st form of implementation of the chlorine dioxide gas generator of this invention.

(First embodiment)
One advantageous form for carrying out the invention is shown in FIG. 1A is a side view, and FIG. 1B is a cross-sectional view taken along line XX. The chlorine dioxide gas generator 10 includes a container 1, a porous layer 2, a porous layer 3, a porous layer 4, and a container lid 5. The container 1 can be poured with water from above. The porous layer 2, the porous layer 3, and the porous layer 4 are stacked so as to be in close contact with each other along the inner wall of a cylindrical container (with a bottom) as shown in FIG. Forming. FIG. 2 shows a cross section of the device 10 along the line YY in FIG. The hatch is omitted in the cross-sectional view.

  The porous layer 4 is impregnated with sodium chlorite by impregnating a sodium chlorite aqueous solution (for example, 10%) and drying at room temperature. The porous layer 2 is impregnated with sodium citrate by infiltrating a citrate-sodium aqueous solution (for example, 10%) and drying at room temperature. Prior to use, the container 1 is sealed with a lid 5.

(Operation of the first embodiment)
When the lid 5 of the container 1 is removed and a small amount of water is poured into the container 1 from above, the water accumulated at the bottom of the container 1 soaks into the porous layer 2, the porous layer 3 and the porous layer 4, and the respective layers Spread throughout. The sodium citrate impregnated in the porous layer 2 is gradually dissolved and diffuses toward the porous layer 4 through the porous layer 3. The sodium citrate diffused in the porous layer 4 lowers the pH of the porous layer 4 and acts on the sodium chlorite impregnated in the porous layer 4 to generate chlorine dioxide gas. Chlorine dioxide gas is discharged to the outside from the opening at the top of the container 1 and diffuses. FIG. 5 shows a cross section along the line YY of the apparatus in a state where water is poured into the container 1.

(Second embodiment)
Another advantageous form for carrying out the invention is shown in FIGS. 3A is a side view, and FIG. 3B is a cross-sectional view taken along line ZZ. The chlorine dioxide gas generator 20 is composed of a container 1, a porous layer 2, a porous layer 3, a porous layer 4, and a container lid 5 like the chlorine dioxide gas generator 10 (hereinafter referred to as “device 10”). The shape of the porous layer multilayer body 21 formed by the porous layer 2, the porous layer 3, and the porous layer 4 is different from that of the porous layer multilayer body 11 in the device 10. Except for this point, the chlorine dioxide gas generator 20 is the same as the device 10. FIG. 4 shows a cross section of the device 20 along line U-U in FIG. The hatch is omitted in the cross-sectional view.

  As shown in FIG. 3 (b), the porous layer stack 21 includes a portion along the inner wall of the container 1 and a portion placed at the center of the cylindrical container 1. The outer surfaces of the porous layer 4 are bonded to each other near the center of the container 1 and are fixed to each other.

(Operation of Second Embodiment)
Since the operation at the time of using the chlorine dioxide gas generator 20 is the same as that of the apparatus 10, the description thereof is omitted.

  The chlorine dioxide gas generator of the present invention can supply chlorine dioxide gas having effects such as deodorization, sterilization, mold prevention, and virus removal to an indoor space at an effective concentration. Chlorine dioxide gas is also used for sterilization of medical equipment.

DESCRIPTION OF SYMBOLS 1 Container 2 Porous layer 3 Porous layer 4 Porous layer 5 Container lid 6 Water 10 Chlorine dioxide gas generator II Porous layer multilayer body 20 Chlorine dioxide gas generator 21 Porous layer multilayer body

Claims (17)

The first hydrophilic porous layer that has absorbed the first component, the second hydrophilic porous layer that may absorb the second component as necessary, and the third that has absorbed the third component Consisting of a hydrophilic porous layer of
The first component comprises chlorite;
The third component comprises an acidic substance or a pH buffer capable of imparting acidity to the first hydrophilic porous layer,
The first, second and third hydrophilic porous layers are sequentially stacked so that they are in close contact with each other,
A chlorine dioxide gas generator configured to supply moisture to any one of the hydrophilic porous layers.   The chlorine dioxide gas generator of claim 1, wherein the first, second and third porous layers are flexible.   The chlorine dioxide gas generator according to claim 1 or 2, wherein the superimposed first, second and third porous layers form a plane.   The chlorine dioxide gas generator according to claim 1 or 2, wherein the stacked first, second and third porous layers form a curved surface.   The chlorine dioxide gas generator according to claim 4, wherein the superimposed first, second and third porous layers form at least a part of a cylindrical surface.   The chlorine dioxide gas generator according to claim 1, wherein the second component is a neutral or weakly alkaline component.   The chlorine dioxide gas generator according to claim 1, wherein the pH buffering agent can adjust the pH of the first component to a pH in the range of 3.5 or more and less than 7.0 in the presence of water.   The chlorine dioxide gas generator according to claim 7, wherein the pH buffering agent can adjust the pH of the first component to 4.5 to 6.5 in the presence of water.   The chlorine dioxide gas generator according to claim 7, wherein the pH buffering agent can adjust the pH of the first component to 4.5 or more and less than 6.0 in the presence of water.   The chlorine dioxide gas generator according to claim 8 or 9, wherein the pH buffer is selected from a phosphate, an aliphatic carboxylic acid, and an aliphatic carboxylate.   The chlorine dioxide gas generator according to claim 1, wherein the third component contains a hygroscopic substance.   The chlorine dioxide gas generator according to claim 11, wherein the hygroscopic substance is magnesium chloride, potassium dihydrogen phosphate or calcium lactate.   The chlorine dioxide gas generator according to claim 4 or 5, wherein the third porous layer is stacked so as to be on the outermost side.   The chlorine dioxide gas generator according to claim 4 or 5, wherein the first porous layer is exposed to the outside.   The chlorine dioxide gas generator according to claim 14, wherein the stacked first, second and third porous layers are accommodated in a bowl-shaped container having an opening at an upper portion thereof.   The chlorine dioxide gas generator according to claim 1 or 15, wherein water is supplied to at least the third hydrophilic porous layer from below. The first hydrophilic porous layer that has absorbed the first component, the second hydrophilic porous layer that may absorb the second component as required, and the third that has absorbed the third component Consisting of a hydrophilic porous layer, and a liquid container having an opening at the top,
The first component comprises chlorite;
The second component is a neutral or weakly alkaline component;
The third component comprises an acidic substance or a pH buffer capable of imparting acidity,
The first, second and third hydrophilic porous layers are sequentially stacked so as to be in close contact with each other, and accommodated in the container,
A chlorine dioxide gas generator configured to supply water to the third hydrophilic porous layer by pouring water into the liquid container.

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