KR101322536B1 - Alumina desiccant rotor and method of manufacturing the alumina desiccant rotor - Google Patents

Abstract

An alumina dehumidification rotor and a manufacturing method thereof are disclosed.
Method for producing alumina dehumidifying rotor according to the present invention comprises the steps of: (a) coating aluminum hydroxide on inorganic paper; (b) manufacturing a honeycomb structure by polarizing and winding the aluminum hydroxide coated inorganic paper; (c) coating the honeycomb structure with a binder; And (d) forming alumina from the aluminum hydroxide through heat treatment.

Description

ALUMINA DESICCANT ROTOR AND METHOD OF MANUFACTURING THE ALUMINA DESICCANT ROTOR with Excellent Regeneration Temperature Lowering Effect and Dehumidifying Effect in High Humidity Range

The present invention relates to a dehumidifying rotor for indoor humidity control, and more particularly, to a technique capable of manufacturing an alumina dehumidifying rotor at low cost using aluminum hydroxide.

Maintaining proper temperature and humidity in the room is the most basic requirement for creating a pleasant indoor environment. Maintaining proper temperature and humidity in these rooms is becoming more important according to the desire of modern people to pursue higher quality of life.

Dehumidifiers are used to maintain indoor humidity in summer with high humidity and to obtain low humidity when storing digital devices or clothes.

The dehumidifier includes a condenser dehumidifier and an adsorber dehumidifier.

Among these, the condensation type dehumidifier has a disadvantage in that it is bulky and noisy. However, the adsorption type dehumidifier can be said to be useful as a household dehumidifier because of its small volume and low noise.

The adsorption type dehumidifier is driven in such a way that the dehumidifying rotor impregnated with the dehumidifying agent repeats the process of absorbing and desorbing moisture.

Zeolites, which are widely used as dehumidifiers, have fast adsorption rates and high dehumidification efficiency in low humidity ranges.

However, in the case of the zeolite dehumidification rotor using zeolite as a dehumidifying agent, there is a limit to the amount of dehumidification in the high humidity region.

In addition, the zeolite dehumidification rotor has a high energy consumption since the regeneration temperature for moisture desorption must be higher than 150 ° C., and the regeneration temperature is higher than 150 ° C., so that the temperature of the air discharged after passing through the dehumidification rotor is high. have.

An object of the present invention is to provide a method for producing an alumina dehumidification rotor that can easily produce an alumina dehumidification rotor.

Another object of the present invention is to provide an alumina dehumidification rotor capable of lowering the regeneration temperature for water desorption to 100 ° C. or less and exhibiting excellent dehumidification efficiency in a high humidity range.

Method for producing an alumina dehumidifying rotor according to an embodiment of the present invention for achieving the above object is (a) coating aluminum hydroxide on inorganic paper; (b) manufacturing a honeycomb structure by polarizing and winding the aluminum hydroxide coated inorganic paper; (c) coating the honeycomb structure with a binder; And (d) forming alumina from the aluminum hydroxide through heat treatment.

Method for producing an alumina dehumidifying rotor according to another embodiment of the present invention for achieving the above object is (a) applying a coating liquid containing aluminum hydroxide powder, a binder and a solvent to the inorganic paper and drying it; (b) coating the inorganic paper with a binder; (c) manufacturing a honeycomb structure by polarizing and winding the inorganic paper; And (d) forming a porous alumina from the aluminum hydroxide powder through a heat treatment.

Alumina dehumidifying rotor according to another embodiment of the present invention for achieving the above another object is manufactured by the above-described method, characterized in that the regeneration temperature is 100 ℃ or less.

The method for manufacturing the alumina dehumidification rotor according to the present invention can form porous alumina through heat treatment using aluminum hydroxide fine powder having a low cost of 1 μm, thereby reducing the manufacturing cost of the dehumidification rotor.

In addition, the alumina dehumidification rotor according to the present invention can absorb moisture into the pores by the capillary force, can lower the regeneration temperature to 100 ℃ or less, can exhibit excellent dehumidification performance in the high humidity range.

1 is a flow chart schematically showing a method for manufacturing an alumina dehumidifying rotor according to an embodiment of the present invention.

Hereinafter, a highly efficient inorganic dehumidifying rotor and a manufacturing method thereof according to the present invention will be described in detail.

In this case, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a flow chart schematically showing a method for manufacturing an alumina dehumidifying rotor according to an embodiment of the present invention.

Referring to FIG. 1, the illustrated alumina dehumidifying rotor manufacturing method includes an aluminum hydroxide coating step (S110), a honeycomb structure manufacturing step (S120), a binder coating step (S130), and a heat treatment step (S140).

First, in the aluminum hydroxide coating step (S110) is coated aluminum hydroxide (Al (OH) ₃ ) to the inorganic paper.

Coating of aluminum hydroxide may be carried out by applying a coating liquid containing an aluminum hydroxide powder, a binder and a solvent to the inorganic fiber paper, and then drying. To the viscosity of the coating solution, a viscosity modifier may be added.

The aluminum hydroxide powder may use a 1 μm class having an average particle diameter of 0.5 μm to 1.5 μm so as to easily form porous alumina.

The coating liquid including the aluminum hydroxide powder, the binder and the solvent may have a viscosity of 10 to 50 cPs, more preferably 20 cPs. If the viscosity is less than 10 cPs, the coating liquid may flow down from the inorganic paper due to the low viscosity, the film density is too low can lower the dehumidification performance. In contrast, when the viscosity exceeds 50 cPs, the aluminum hydroxide powder and the binder in the coating liquid are difficult to uniformly disperse.

The drying temperature may be slightly different depending on the type of the solvent, it may present 120 ~ 140 ℃ corresponding to about 130 ℃.

The inorganic paper corresponds to a base material that becomes a honeycomb structure through polarization molding and winding. The inorganic paper may be made of inorganic fibers such as glass fibers and ceramic fibers having large voids, and any one of glass fibers and ceramic fibers may be used alone, or a mixture thereof may be used.

On the other hand, the inorganic paper is preferably used having a thickness of 50 ~ 700 ㎛, more preferably 100 ~ 200 ㎛ can be presented. When the thickness of the inorganic paper is less than 50 μm, the wet tensile strength of the paper may be weak, causing breakage prevention in dip coating, etc., which may cause problems in the continuous process of the inorganic hydroxide coated inorganic paper. On the contrary, when the thickness of the inorganic paper exceeds 700 μm, there is a problem of forming an accurate wave pattern in the polarization molding process of the inorganic paper, and the possibility of contacting alumina and air even after manufacturing the dehumidification rotor is lowered, thereby increasing the actual dehumidification efficiency. Can fall.

Next, in the honeycomb structure production step (S120), the honeycomb structure is manufactured by polarizing and winding the inorganic paper coated with aluminum hydroxide.

The polarization forming process may use a general corrugated cardboard manufacturing process, the corrugated cardboard forming conditions are determined according to the tensile strength, flexibility, formability, surface properties of the inorganic paper.

Winding process is wound in a circular shape in accordance with the required specifications for the production of honeycomb structure, one-side corrugated cardboard formed by corrugation molding.

Next, in the binder coating step (S130), the manufactured honeycomb structure is coated with an organic or inorganic binder.

As the binder, a silica binder may be used. For example, the honeycomb structure may be dip-coated in a silica sol (Sol), and then dried in a temperature range of about 120 to 140 ° C. In the case of the silica sol is converted to silica gel by heat treatment, the silica gel can exhibit a dehumidification performance in a high humidity region of approximately 60% or more relative humidity, it is possible to further improve the dehumidification performance in the high humidity region of the alumina dehumidification rotor according to the present invention have.

In FIG. 1, the binder coating is performed after the honeycomb structure is manufactured, but the binder coating may be performed before the honeycomb structure is manufactured. In this case, a binder coating is performed on the inorganic paper coated with aluminum hydroxide.

Next, in the heat treatment step (S140) to form alumina from aluminum hydroxide through heat treatment. In this step, H ₂ O is released from the hydroxide hydroxide aluminum hydroxide (Al (OH) ₃ ) to form an oxide alumina (Al ₂ O ₃ ). When an organic binder is used as the binder, the organic binder is removed during the heat treatment.

The heat treatment is preferably performed at about 1 hour or more in the temperature range of 450-600 degreeC. If the heat treatment temperature is less than 450 ℃, alumina formation may be insufficient from aluminum hydroxide, if the heat treatment temperature exceeds 600 ℃, the porosity of the formed alumina can be lowered to lower the dehumidification efficiency, and also the manufacturing cost of the dehumidification rotor May cause an increase.

After the heat treatment, in order to improve the adhesion of the alumina, an inorganic binder is coated on the honeycomb structure.

As described above, the method for manufacturing the alumina dehumidification rotor according to the present invention can produce a porous alumina dehumidification rotor through heat treatment using inexpensive aluminum hydroxide, thereby reducing the manufacturing cost of the dehumidification rotor, thereby securing a price competitiveness. have.

In addition, the alumina dehumidification rotor produced by the method according to the present invention may exhibit excellent dehumidification performance in a high humidity region of approximately 60% or more relative humidity. In addition, since the alumina dehumidification rotor has a regeneration temperature of 100 ° C. or lower, energy saving can be pursued.

Example

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

1. Dehumidification rotor manufacturer

Example 1

(1) After dispersing 420 g of aluminum hydroxide powder having an average particle diameter of 1 μm and 80 g of an organic binder in 500 g of water to prepare a slurry having a solid content of 50 wt%, the viscosity was adjusted to 20 cPs using a viscosity modifier. The coating solution was prepared by stirring for 30 minutes.

(2) After 32 g / m ² glass paper was dip coated on the prepared coating liquid, it was dried at 130 ° C.

(3) The honeycomb structure was produced by polarizing and winding the dried glass paper.

(4) The honeycomb structured body was dip coated on a silica sol, and then dried completely at 130 ° C.

(5) The honeycomb structure coated with silica sol was heat-treated at 500 ° C. for 1 hour.

(6) An inorganic binder was coated on the heat-treated honeycomb structured body, followed by drying to prepare an alumina dehumidifying rotor.

Comparative Example 1

A zeolite dehumidifying rotor was manufactured in the same manner as in Example 1 except that zeolite was used instead of aluminum hydroxide and the heat treatment was omitted.

2. Measurement of physical properties

In order to evaluate the dehumidifying ability of the dehumidifying rotors prepared according to Example 1 and Comparative Example 1, the physical property measuring method was to maintain the dehumidifying rotor dried at 130 ° C at 25 ° C, 50% relative humidity, 25 ° C, and 90% relative humidity, respectively. After standing in a constant temperature and humidity chamber for 30 minutes, the weight of the absorbed moisture was measured by changing the weight of the dehumidifying rotor.

3. Property evaluation

The weight change (dehumidification amount) of the dehumidification rotor manufactured by Example 1 and Comparative Example 1 is shown in Table 1.

[Table 1]

Referring to Table 1, at 50% relative humidity, the amount of dehumidification in the zeolite dehumidification rotor of Comparative Example 1 was slightly higher than that of the alumina dehumidification rotor of Example 1. However, it can be seen that the dehumidification amount of the alumina dehumidification rotor corresponding to Example 1 is higher than that of the zeolite dehumidification rotor of Comparative Example 1 in the relative humidity of 90% corresponding to the high humidity region.

In particular, in the case of the alumina dehumidification rotor of Example 1, it can be seen that the regeneration temperature is less than 100 ℃, much lower than the zeolite dehumidification rotor of Comparative Example 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the true scope of the present invention should be determined by the following claims.

S110: aluminum hydroxide coating step
S120: honeycomb structure production step
S130: Binder Coating Step
S140: Heat Treatment Step

Claims (16)

(a) coating aluminum hydroxide on the inorganic paper;
(b) manufacturing a honeycomb structure by polarizing and winding the aluminum hydroxide coated inorganic paper;
(c) coating the honeycomb structure with a binder;
(d) forming alumina from the aluminum hydroxide through heat treatment; And
(e) after the heat treatment, coating the inorganic binder on the honeycomb structure; alumina dehumidifying rotor manufacturing method comprising a.
delete The method of claim 1,
The step (a)
A coating solution comprising an aluminum hydroxide powder, a binder and a solvent is applied to the inorganic fiber paper, and then dried.
The method of claim 3,
The aluminum hydroxide powder
Alumina dehumidification rotor manufacturing method, characterized in that the average particle diameter is 0.5 ~ 1.5㎛.
The method of claim 3,
The coating liquid
Method for producing an alumina dehumidification rotor, characterized in that the viscosity is 10 to 50 cPs.
The method of claim 3,
The drying is
A method for producing an alumina dehumidifying rotor, which is carried out at a temperature range of 120 to 140 ° C.
The method of claim 1,
In the step (c), the binder
It is a silica type binder, The manufacturing method of the alumina dehumidification rotor characterized by the above-mentioned.
The method of claim 7, wherein
The step (c)
Method for producing an alumina dehumidifying rotor, characterized in that the honeycomb structure is dip coated on a silica sol (Sol), and then dried.
9. The method of claim 8,
The drying is
A method for producing an alumina dehumidifying rotor, which is carried out at a temperature range of 120 to 140 ° C.
The method of claim 1,
The heat treatment
A method for producing an alumina dehumidification rotor, characterized in that carried out at a temperature range of 450 ~ 600 ℃.
The method of claim 1,
The inorganic paper is
A method for producing an alumina dehumidifying rotor comprising at least one inorganic fiber of glass fiber and ceramic fiber.
(a) applying a coating liquid containing aluminum hydroxide powder, a binder, and a solvent to the inorganic paper, followed by drying;
(b) coating the inorganic paper with a binder;
(c) manufacturing a honeycomb structure by polarizing and winding the inorganic paper;
(d) forming porous alumina from the aluminum hydroxide powder through heat treatment; And
(e) after the heat treatment, coating the inorganic binder on the honeycomb structure; alumina dehumidifying rotor manufacturing method comprising a.
The method of claim 12,
The aluminum hydroxide powder
Alumina dehumidification rotor manufacturing method, characterized in that the average particle diameter is 0.5 ~ 1.5㎛.
The method of claim 12,
The heat treatment
A method for producing an alumina dehumidification rotor, characterized in that carried out at a temperature range of 450 ~ 600 ℃.
The method of claim 12,
After the heat treatment, the method for producing an alumina dehumidifying rotor, characterized in that it further comprises the step of coating an inorganic binder on the honeycomb structure.
The alumina dehumidification rotor manufactured by the manufacturing method in any one of Claims 1 and 3 to 15 and whose regeneration temperature is 100 degrees C or less.

Images