JPH0985084A - Adsorbing material and adsorbing object using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform high capacity adsorption by an adsorbing material and an adsorbing object using the same. SOLUTION: A hydrophilic adsorbent 2 with a particle size of below 10μm is supported on a carrier 1 composed of inorg. fibers with a diameter of 1-20μm and density of 100-200kg/m<3> , and having a thickness of 0.15-1.5mm. A liquid is permeated throughout the fibers of the carrier without laminating adsorbent particles on the surface of the carrier to enhance adsorbing capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorbent and an adsorbent using the adsorbent, which is used in dehumidifying and humidifying devices.

[0002]

2. Description of the Related Art Conventionally, this type of adsorbent has been disclosed in Japanese Patent Publication No. 5-2.
As disclosed in Japanese Patent No. 0141, an example is known in which porous ore such as zeolite or activated carbon is attached to a porous sheet material such as paper or cotton cloth or nonwoven cloth. Then, when the fluid to be treated, for example air, comes into contact with the adsorbent, odors and water in the air are adsorbed by the porous ore and activated carbon.

[0003]

However, in the above constitution, a combination of the particle diameter of the adsorbent particles such as the porous ore to be carried and the fiber diameter of the fibrous sheet-like carrier, the fiber density and the sheet thickness is used. Depending on the situation, as shown in FIG. 6, the adsorbent particles 12 do not penetrate into the inside of the carrier 11,
It may be laminated on the surface of the carrier. At this time, the flow of the fluid to be processed into the inside of the sheet is hindered,
The adsorbent in which the front, rear, left, and right sides are covered with adsorbent particles cannot exhibit an effective adsorption capacity, and there is a drawback that the effect is small relative to the apparent adsorbent adhering amount.

Further, there is a problem that air pollution and a decrease in hygroscopicity occur due to the falling of the adsorbent particles carried.

The present invention rapidly adsorbs moisture in the air,
The purpose of the present invention is to obtain an adsorbent and an adsorbent suitable for the purpose of desorbing the water adsorbed by heating. For this purpose, the first purpose is to disperse as much adsorbent as possible and support it on a carrier. To do.

A second object is to firmly support the adsorbent on the carrier. Further, the third purpose is to make it easy for air to pass through.

[0007]

In order to achieve the first object of the present invention, the adsorbent comprises a carrier made of an inorganic fiber having a fiber diameter of 1 to 20 μm, and a hydrophilic material having a particle diameter not exceeding 10 μm. It carries a hydrophilic adsorbent.

The adsorbent has a fiber density of 100 to 20.
A carrier consisting of 0 kg / m ³ of inorganic fiber has a particle size of 1
It carries a hydrophilic adsorbent that does not exceed 0 μm.

The adsorbent has a sheet thickness of 0.15 to 0.15.
A carrier composed of an inorganic fiber having a size of 1.5 mm and a hydrophilic adsorbent having a particle diameter not exceeding 10 μm is carried.

Further, the carrier is an inorganic fiber which is surface-treated by impregnating it with a solution of a flocculant containing a cationic organic polymer electrolyte as a main component.

In order to achieve the second object of the present invention, a suspension in which an adsorbent and a binder containing silica as a main component are dispersed is impregnated into a carrier and baked in a temperature range of 200 to 600 ° C. Is.

In order to achieve the third object, the present invention has a fiber diameter of 1 to 20 μm and a fiber density of 100 to 200.
0.15 to 1.5 mm thick inorganic fiber of kg / m ³
An air passage is formed by an adsorbent in which a hydrophilic adsorbent having a particle diameter not exceeding 10 μm is carried on the sheet-shaped carrier.

[0013]

The present invention is an adsorbent and an adsorbent used for the purpose of dehumidifying or humidifying the air in a specific space by rapidly adsorbing the moisture in the air and repeating the rapid desorption by heating the adsorbed moisture. Then, the adsorbent according to the present invention was used to form an adsorbent under the same conditions, and the adsorbed amount of water in the air was evaluated under the same conditions.

As a result, by using an adsorbent in which a hydrophilic adsorbent having a particle diameter not exceeding 10 μm is carried on a carrier made of an inorganic fiber having a fiber diameter of 1 to 20 μm, the case where the adsorbent is out of the above fiber diameter range The water adsorption capacity was superior to that of The fiber density of 100 to 200 kg / m ³
By using an adsorbent in which a hydrophilic adsorbent having a particle diameter of not more than 10 μm is supported on a carrier made of inorganic fiber, it is possible to enhance the water adsorption capacity, and at the same time, the carrier is used to maintain mechanical strength. It is also excellent in workability. Furthermore,
An adsorbent in which a hydrophilic adsorbent having a particle diameter not exceeding 10 μm is carried on a carrier made of an inorganic fiber having a sheet thickness of 0.15 to 1.5 mm has high mechanical strength as a carrier while maintaining high adsorption capacity. It was rich in workability. Within these numerical ranges of fiber diameter, fiber density and sheet thickness, the particle size is 1
When a suspension in which a hydrophilic adsorbent having a diameter of 0 μm is dispersed is impregnated into a carrier by a method such as coating or dipping,
The adsorbent particles penetrated the inside of the carrier sheet so well that the particle layer was not easily formed on the surface layer, and at the same time a large surface area of the fiber carrying the adsorbent could be secured.

Further, the carrier is impregnated with a solution of a coagulant containing a cationic organic polymer electrolyte as a main component and is surface-treated with an inorganic fiber, so that the adsorbent particles adhere to the fiber. The adsorbent particles that have improved and permeated into the carrier can be reliably retained on the fiber surface, and can be dispersed and supported in the carrier fiber.

Further, the carrier is impregnated with a suspension in which an adsorbent and a binder having silica as a main component are dispersed, and the suspension is 200-60.
By firing in the temperature range of 0 ° C., the adsorbent particles carried can be prevented from falling off. Moreover, when zeolite particles such as zeolite are used as the adsorbent, since they have the same main component as the binder, they do not hinder the adsorbability of the adsorbent and are stable against thermal fluctuations. In addition, the adsorbent particles are more firmly held by firing the adsorbent supported on the carrier.

The inorganic fiber having a fiber diameter of 1 to 20 μm and a fiber density of 100 to 200 kg / m ³ has a thickness of 0.1.
The particle size is 10μ on a carrier in the form of a sheet of 5 to 1.5 mm.
Since the air that is the fluid to be processed is formed by the adsorbent that supports the hydrophilic adsorbent that does not exceed m, the air and the adsorbent are likely to come into contact with each other, and another member that forms the air passage is required. And not.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a carrier 1 which is made of inorganic fibers and has a fiber diameter of 1 to 20 μm, preferably 3 to 10 μm.
FIG. 2 is a cross-sectional view of an adsorbent having a particle diameter not exceeding 0 μm and impregnated with and carrying a suspension of a hydrophilic adsorbent 2 liquid-dispersed using water or isopropyl alcohol set to a temperature of 20 to 90 ° C. as a dispersion medium. is there.

In the above structure, the adsorbent 2 penetrates into the inside of the fiber of the carrier 1 without being laminated. Therefore, diffusion of water in the air, which is the fluid to be processed, into the carrier 1 is facilitated, and the adsorption capacity is improved. The temperature range of the suspension is appropriate because the adsorbent is less likely to penetrate deep into the carrier at a temperature lower than 20 ° C. and the suspension may be deteriorated at a temperature of 90 ° C. or higher. .
FIG. 2 shows an example of the adsorbent 3 in which the sheet-shaped carrier 1 carrying the adsorbent 2 is processed into a flat plate and a corrugated plate and alternately stacked to facilitate the passage of air. The corrugated plate-shaped carrier is capable of coming into contact with air on both the front and back surfaces thereof, and has a structure suitable for the purpose of rapid adsorption.

Now, how the constituent requirements of the inorganic fiber as the carrier relate to the performance as the adsorbent will be described below. In these explanations, fine particles having a particle size of all of the adsorbents 2 not exceeding 10 μm are selected. The method of impregnation and the conditions of drying and baking of the impregnating liquid are common. Further, the sheet-shaped carrier 1 was processed to form the adsorbent 3 of FIG. 2, and the size at this time is 110 pieces per piece.
It was a cube of mm. Further, the space occupied by the carrier 1 in the space occupied by the adsorbent 3 is approximately 30%. After the cubic adsorbent 3 was left at 250 ° C. for 3 hours so as to have almost no water retained, the adsorbent 3 was removed.
The amount of adsorbed water per unit time can be known by measuring how much the weight increases when air is sent so as to penetrate from one surface to the opposite surface.
The air at this time has a relative humidity of 60% at 27 ° C., and this air is passed through the adsorbent ³ by 1 m ³ per minute.

As a result of measuring the adsorption capacity produced under the above conditions, first, FIG. 3 shows a case where the fiber diameter is changed. Here, the fiber density is 180 kg / m ³ and the carrier sheet thickness is 0.5 mm. The fiber diameter of 1 to 20 μm showed good adsorption ability. When the fiber diameter is 1 μm or less, it is difficult for the adsorbent to penetrate into the inside of the carrier when the adsorbent is loaded,
Further, it is considered that when the thickness is 20 μm or more, the surface area of the fibers to be supported is reduced, so that the adsorbent loading amount is decreased in any case.

Next, FIG. 4 shows the influence of the fiber density. Here, the fiber diameter is 10 μm, and the carrier has a sheet thickness of 0.5.
mm. Other conditions are the same as those described above. Here, an excellent adsorption capacity was obtained in a fiber density range of 100 to 200 μm. This is because when the fiber density is 100 μm or less, the amount of fibers to be supported is small and the adsorbent carrying capacity is reduced, and when the fiber density is 200 μm or more, the adsorbent is less likely to be impregnated into the inside of the sheet and the adsorbent carrying amount is also decreased. . In addition to this, when the fiber density becomes high, the sheet becomes hard, which makes it difficult to process the adsorbent as shown in FIG.

Further, FIG. 5 shows the relationship with the thickness of the sheet which is the carrier. Here, the fiber diameter is 10 μm, the fiber density is 180 kg / m ³ , and the other conditions are as described above. In addition, the volume occupied by the carrier in the adsorbent in the form of a cube of which one piece is 110 mm has a sheet thickness of 0.5.
When the sheet thickness is 30%, the ratio of the carrier volume to the space volume changes when the sheet thickness is different, but the apparent surface area is the same. When the sheet thickness is 0.15 mm or less, the adsorption capacity is reduced, but this is because the absolute amount of the adsorbed fibers is reduced and the adsorbent loading amount is reduced. On the other hand, as the sheet thickness becomes thicker, the adsorbent becomes less likely to permeate into the sheet and air as the fluid to be adsorbed is also less likely to pass into the sheet. It did not bring about an improvement in the adsorption capacity. Further, when the sheet thickness is increased, there is a problem that the corrugated plate in the case of configuring the adsorbent 3 as shown in FIG. 2 becomes difficult to form. As a result, the sheet thickness is 0.15 to 1.5 m
The range of m was appropriate.

By this treatment, the adhesion of the adsorbent particles to the carrier fiber can be enhanced, and the hydrophilic adsorbent particles can be uniformly supported on the entire surface of the carrier without agglomeration. As a result, the surface area of the adsorbent that acts on adsorption increases, and the adsorption rate can be increased.

Next, in order to firmly hold the adsorbent on the carrier, a binder having silica as a main component is added to the adsorbent to prepare a suspension, and the suspension is applied or dipped. The carrier is impregnated by the above method, and then firing is performed in the range of 200 ° C to 600 ° C. As a result, since the silica dissolves and adheres between the surface of the fiber as the carrier and the adsorbent particles, the adsorbent does not come off. In particular, when zeolite is used as the adsorbent, since it is a component of the same type as silica that is the binder, it has good adsorbability and can block the ultrafine holes on the adsorbent surface that hinder the adsorbent's adsorption ability. Can be reduced.

When produced under the above-mentioned carrier fiber conditions, a good adsorption capacity can be obtained, but preferably the fiber diameter is 3 to 10 μm and the fiber density is 150 to 180 kg /
In the case of carrying a hydrophilic adsorbent that does not exceed 10 μm on a sheet-shaped carrier with a thickness of 0.25 to 0.5 mm, which is made of m ³ inorganic fiber, in terms of adsorption capacity, mechanical strength and processability It is excellent and it is easy to form an adsorbent as shown in FIG. The configuration of the ventilation passage of the adsorbent is not limited to the shape shown in FIG. 2, and it is easy to stack a flat plate and a corrugated plate and wind them into a cylindrical shape, and a triangular wave or rectangular cross section. It is also possible to stack the plates molded so as to have the projections abutting each other so that the ventilation passages are a set of rhombic or square small holes.

[0028]

As described above, according to the adsorbent of the present invention,
When a carrier in which a hydrophilic adsorbent is dispersed in a liquid is applied to the carrier of an inorganic fiber or the carrier is immersed to carry the adsorbent, the fiber diameter of the inorganic fiber is 1 to 20.
The adsorbent particles are laminated on the surface of the carrier by applying a suspension of adsorbent particles having a particle size not exceeding 10 μm dispersed in a liquid having a particle size of 10 μm or immersing the carrier to carry the adsorbent. Without permeation, it penetrates into the inside of the fibrous material of the carrier and facilitates the diffusion of water vapor into the inside of the carrier, so that the adsorption capacity can be increased. Further, since the adsorbent particles are carried inside the fibers of the carrier, it is possible to prevent the adsorbent particles from falling off.

The fiber density of the inorganic fibers is 10
A high adsorption capacity is obtained by applying a suspension of adsorbent particles having a particle size not exceeding 10 μm to a carrier of 0 to 200 kg / m ³ or immersing the carrier to carry the adsorbent. It is also suitable for forming an air passage as an adsorbent.

Further, a sheet made of an inorganic fiber is dispersed in a liquid form on a carrier having a thickness of 0.15 to 1.5 mm.
To secure mechanical strength and processability while maintaining high adsorption capacity by applying a suspension of adsorbent particles having a particle size not exceeding 0 μm or immersing the carrier to support the adsorbent. You can

By treating the surface of the fiber with a solution of an aggregating agent containing a cationic organic polymer electrolyte as a main component, the particles of the adsorbent are uniformly supported on the surface of the carrier without agglomerating. can do.

Further, a carrier in which a suspension in which an adsorbent and a binder containing silica as a main component are dispersed is impregnated and supported.
By calcining at 00 to 600 ° C., the adsorbent particles carried can be prevented from falling off. Moreover, since it has the same main component as the adsorbent particles, it is stable against thermal fluctuations and can firmly hold the adsorbent particles without impeding the adsorption ability of the adsorbent.

Further, the adsorbent prepared by the above means, which has a ventilation path such as a layer shape or a corrugated shape, can be effectively used for a dehumidifying and humidifying device by taking advantage of the above points.

[Brief description of drawings]

FIG. 1 is a sectional view of an adsorbent in which an adsorbent powder is carried on a carrier made of an inorganic fiber according to an embodiment of the present invention.

FIG. 2 is a perspective view when the adsorbent is molded into a corrugated shape.

FIG. 3 is a diagram showing the relationship between the fiber diameter and the water adsorption amount.

FIG. 4 is a diagram showing the relationship between the fiber density and the amount of adsorbed water.

FIG. 5 is a diagram showing a relationship between a sheet thickness of the carrier and a moisture adsorption amount.

FIG. 6 is a sectional view of a conventional adsorbent.

[Explanation of symbols]

 1 carrier 2 adsorbent 3 adsorbent

Claims (8)

[Claims] 1. An adsorbent comprising a carrier made of an inorganic fiber having a fiber diameter of 1 to 20 μm and a hydrophilic adsorbent having a particle diameter not exceeding 10 μm. 2. An adsorbent comprising a carrier composed of an inorganic fiber having a fiber density of 100 to 200 kg / m ^{3 and} a hydrophilic adsorbent having a particle diameter not exceeding 10 μm. 3. An adsorbent in which a hydrophilic adsorbent having a particle diameter not exceeding 10 μm is carried on a carrier made of an inorganic fiber having a sheet thickness of 0.15 to 1.5 mm. 4. The carrier according to claim 1, wherein the carrier is an inorganic fiber which is surface-treated by impregnating a solution of a coagulation containing a cationic organic polymer electrolyte as a main component. Adsorbent. 5. A carrier is impregnated with a turbid liquid in which an adsorbent and a binder containing silica as a main component are dispersed, and the temperature is set to 200 to 600 ° C.
The adsorbent according to any one of claims 1 to 4, which is fired in the temperature range of. 6. A fiber diameter of 1 to 20 μm and a fiber density of 10
0-200 kg / m ³ of inorganic fiber having a thickness of 0.15
1.5 mm sheet-shaped carrier with a particle size of 10 μm
An adsorbent in which a ventilation path is formed by an adsorbent that supports a hydrophilic adsorbent that does not exceed 7. The adsorbent according to claim 6, wherein the carrier is surface-treated by impregnating a solution of an aggregating agent containing a cationic organic polymer electrolyte as a main component. 8. An adsorbent is impregnated into a carrier with a turbid liquid in which an adsorbent and a binder containing silica as a main component are dispersed, and the adsorbent is impregnated in a range of 200-60
The adsorbent according to claim 6 or 7, which is calcined in a temperature range of 0 ° C.