KR101208869B1 - Non-organic desiccant rotor with high efficiency and method of manufacturing the non-organic desiccant rotor - Google Patents

Abstract

A high efficiency dehumidification rotor composed only of inorganic components and a manufacturing method thereof are disclosed.

Method for producing an inorganic dehumidifying rotor according to the present invention comprises the steps of: (a) coating the first inorganic component for low humidity dehumidification on the inorganic fiber paper; (b) converting the inorganic fiber paper coated with the first inorganic component into a single-sided corrugated cardboard sheet; (c) winding the single-faced corrugated cardboard to produce a honeycomb structure; And (d) coating a second inorganic component for high humidity dehumidification on the honeycomb structure.

Description

High-efficiency inorganic dehumidifying rotor and its manufacturing method {NON-ORGANIC DESICCANT ROTOR WITH HIGH EFFICIENCY AND METHOD OF MANUFACTURING THE NON-ORGANIC DESICCANT ROTOR}

The present invention relates to a dehumidifying rotor for indoor humidity control, and more particularly, to inorganic fiber having a high humidity efficiency of 60% or more, such as silica gel and inorganic components having excellent dehumidification efficiency at low humidity of less than 60% relative humidity such as zeolite and the like. The present invention relates to a highly efficient inorganic dehumidifying rotor including all inorganic components having excellent dehumidification efficiency and excellent in dehumidification efficiency in all relative humidity ranges, and a method of manufacturing the same.

Controlling moisture contained in indoor air is very important for maintaining a pleasant living environment of human beings, and is one of the essential controls for managing the quality of products in the industry.

To remove humidity in the air, chemical methods using calcium chloride (CaCl ₂ ), sulfuric acid (H ₂ SO ₄ ), etc., and moisture using silica, active carbon, zeolite, etc. There is a physical method of adsorbing.

A dehumidifier using a desiccant rotor generally rotates a honeycomb dehumidification rotor coated with a dehumidifying agent such as silica and zeolite, and removes moisture while high humidity air is supplied through the adsorption region of the dehumidifying rotor. The honeycomb region, which is converted to air and contains moisture, refers to a device that removes moisture from the air by repeating a regeneration process through a region through which hot air passes.

Conventional dehumidification rotors are manufactured by forming a honeycomb structure mainly by corrugating inorganic paper, and then coating a silica gel produced by the reaction of water glass and sulfuric acid on the honeycomb structure, or directly applying a zeolite to the honeycomb structure.

Due to the nature of the dehumidifying agent, silica gel has a high dehumidification efficiency under a high humidity environment with a relative humidity of 60% or higher, but a low dehumidification efficiency under a low humidity or a high temperature environment, and a zeolite has a limited dehumidification amount regardless of the relative humidity. Use as a dehumidifier in the environment.

Therefore, the conventional dehumidification rotor has a high dehumidification efficiency only in the high humidity region when the silica gel is coated on the honeycomb structure, on the contrary, when the zeolite is coated on the honeycomb structure, the dehumidification efficiency is high only in the low humidity region.

In addition, the dehumidification rotor coated with the zeolite and silica gel at the same time could be assumed, but there was a problem in the uniform coating due to the difference in particle size or specific gravity of the zeolite and silica gel in the production, there was a problem that can not be commercialized.

Accordingly, there is a need for a dehumidification rotor having high dehumidification efficiency in all relative humidity regions including a low humidity region having a relative humidity of less than 60% and a high humidity region having a relative humidity of 60% or more.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly efficient inorganic dehumidification rotor manufacturing method comprising only inorganic components capable of high efficiency dehumidification in all relative humidity regions including low humidity regions of less than 60% relative humidity and high humidity regions of 60% or higher relative humidity. will be.

Another object of the present invention is to provide a highly efficient inorganic dehumidifying rotor that is manufactured by using the method of manufacturing a dehumidifying rotor presented above, which can repeat the dehumidification process of removing moisture contained in the indoor air and the dehumidification process through high temperature regeneration air. will be.

Method for producing a high efficiency inorganic dehumidifying rotor according to an embodiment of the present invention for achieving the above object is (a) coating a first inorganic component for low humidity dehumidification on the inorganic fiber paper; (b) converting the inorganic fiber paper coated with the first inorganic component into a single-sided corrugated cardboard sheet; (c) winding the single-faced corrugated cardboard to produce a honeycomb structure; And (d) coating a second inorganic component for high humidity dehumidification on the honeycomb structure.

In this case, the low-humidity dehumidifying first inorganic component may be a zeolite, in which case (a) is a process of applying a slurry containing the zeolite, an inorganic binder and a solvent to the inorganic fiber paper, and then drying Can proceed.

The second inorganic component for high humidity dehumidification may be selected from a porous silica gel, a porous alumina gel, a porous silica-alumina gel composite, and a porous silica gel-inorganic salt, in which case, the step (d) may include (d1) the Applying or impregnating a coating liquid comprising a precursor of the second inorganic component for high humidity dehumidification in a sol state to a honeycomb structure; And (d2) converting the precursor of the second inorganic component for high humidity dehumidification in the sol state into the second inorganic component for high humidity dehumidification in the gel state by using a sol-gel method. Can proceed.

High-efficiency inorganic dehumidification rotor according to an embodiment of the present invention for achieving the above another object is manufactured by using the above-described method, including both the first inorganic component for low humidity dehumidification and the second inorganic component for high humidity dehumidification. It features.

High-efficiency inorganic dehumidifying rotor according to the present invention and a method for manufacturing the same are coated with a first inorganic component for low humidity dehumidification, such as zeolite, in the form of inorganic fiber paper before the formation of honeycomb structures, and after the formation of honeycomb structures, silica is obtained by using a sol-gel method. The coating of the second inorganic component for high humidity dehumidification, such as a gel, provides an effect of providing an inorganic dehumidification rotor having excellent low humidity dehumidification function and high humidity dehumidification function.

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 this specification.

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

Referring to Figure 1, the inorganic dehumidification rotor manufacturing method shown is a low humidity dehumidification of the first inorganic component coating step (S110), inorganic fiber paper corrugation step (S120), one-side corrugated cardboard winding step (S130) and high humidity dehumidifying agent 2 inorganic component coating step (S140).

In the coating of the first inorganic component for low humidity dehumidification (S110), the first inorganic component for low humidity dehumidification is coated on the inorganic fiber paper.

Here, the term 'low humidity dehumidifying inorganic component' refers to an inorganic component having a higher dehumidifying effect at a humidity of 60% or less relative humidity than a relative humidity of 60% or more, and the term 'high humidity dehumidifying inorganic component' refers to a relative component. Humidity means an inorganic component having a higher dehumidifying effect at a humidity of 60% or more than a humidity of less than 60%.

Inorganic fiber paper is a base material that becomes a honeycomb structure through corrugation, winding, and the like. The inorganic fiber paper may be made of inorganic fibers such as glass fibers and ceramic fibers as a main component. Any one of glass fibers and ceramic fibers may be used alone, or a mixture thereof may be used.

In this case, it is preferable that inorganic fibers such as glass fibers, ceramic fibers, etc. are included at least 40% by weight of the total weight of the inorganic fiber paper.

In addition, the inorganic fiber paper is preferably used having a thickness of 50 ~ 700㎛, more preferably as a thickness of the inorganic fiber paper can present 100 ~ 200㎛. When the thickness of the inorganic fiber paper is less than 50㎛, the wet tensile strength of the paper is weak and the paper is torn during the first dip coating of the coating solution of the aqueous solution, which causes a problem in the continuous process production of the paper impregnated with the dehumidifying agent. In addition, when the thickness of the inorganic fiber paper exceeds 700㎛ the problem of forming an accurate corrugated pattern in the corrugation process of the coated paper and the depth from the surface where the air is in contact with the inside, the contact with the dehumidifying agent and the air coated inside There is a problem that the effective dehumidification efficiency is lower than the dehumidifying agent is low probability.

The low humidity dehumidifying first inorganic component may be a zeolite known to have excellent dehumidification performance at low relative humidity. In this case, coating of the zeolite may be carried out by applying a slurry containing the zeolite, the inorganic binder and the solvent to the inorganic fiber paper, and then drying.

The amount of zeolite impregnation of the inorganic fiber paper can be adjusted according to the concentration, viscosity, number of times of impregnation, etc. of the zeolite slurry.

In the inorganic fiber paper corrugation step (S120), the inorganic fiber paper coated with the first inorganic component is corrugated to produce single-sided corrugated cardboard.

The corrugating step of the inorganic fiber paper (S120) uses a general corrugated cardboard manufacturing process, and the corrugated cardboard forming conditions are determined according to the tensile strength, flexibility, formability, surface properties, etc. of the inorganic fiber paper.

In the single-sided corrugated cardboard winding step (S130), the single-sided corrugated cardboard produced through the inorganic fiber paper corrugation step (S120) is wound in a circular shape according to a required standard, thereby manufacturing a honeycomb structure.

In the coating of the second inorganic component for high humidity dehumidification (S140), the second inorganic component for high humidity dehumidification is coated on the honeycomb structure. That is, in this step, the second inorganic component for high humidity dehumidification is additionally coated on the inorganic fiber paper-based honeycomb structure coated with the first inorganic component for low humidity dehumidification.

The second inorganic component for high humidity dehumidification may be selected from porous silica gel, porous alumina gel, porous silica-alumina gel composite, and porous silica gel-inorganic salt.

Various methods can be used for impregnating the dehumidifying component of the silica or alumina system, and typical gelling and aging of the conventional Sol-Gel corporation after impregnating the silica sol or the alumina sol-containing coating solution. It may be suggested that porous silica gel and alumina gel are formed through drying and heat treatment.

On the other hand, when the second inorganic component for high humidity dehumidification comprises silica gel, the precursor of the second inorganic component for high humidity dehumidification is a commercially available silica sol, various silanes such as tetraethoxysilane (TEOS), methyltriethoxysilane (MTEOS), or the like. It may include a compound. In addition, when the second inorganic component for high humidity dehumidification includes an alumina gel, a commercially available alumina sol may be used as the precursor.

The coating solution including the precursor of the high humidity dehumidifying second inorganic component may further include an inorganic salt. The inorganic salt may be used by using one kind selected from CaCl ₂ , MgCl ₂ , LiCl ₂ , KCl, and NaCl, or by mixing two or more kinds thereof.

For example, when the inorganic salt is added to the coating solution of the silica gel, the dehumidification performance may be increased while the inorganic salt is deposited in the pores of the formed silica gel.

In addition, when the second inorganic component for high humidity dehumidification is silica gel, the precursor may be a structure in which water glass and H-form zeolite are mixed. In this case, the hydrogen ions of the H-form zeolite are replaced with sodium in the water glass to form a zeolite of sodium ions (Na-zeolite), and the silica component of the water glass forms a porous silica gel through the silica sol.

Compared to the case of using inorganic acid such as hydrochloric acid or sulfuric acid as a catalyst, the use of H-form zeolite does not require the removal of the sodium salt formed by the reaction by-product of water glass and inorganic acid, and the formed Na-zeolite acts as a dehumidifying agent. This can contribute to increase the dehumidification performance at low relative humidity.

As described above, the second inorganic component coating step for high humidity dehumidification (S140) is a second inorganic component coating is applied to the honeycomb structure, the coating liquid containing the precursor of the high humidity dehumidifying second inorganic component in a sol (Sol) state Or impregnating and converting the precursor of the second inorganic component for high humidity dehumidification in the sol state into the second inorganic component for high humidity dehumidification in the gel state by using a sol-gel method. Can proceed.

In this case, the sol-gel method is a gelation step, an aging step of aging for 24 hours at a temperature of about 50 ° C. in a closed state, and a drying step of sufficiently drying at a temperature of about 130 ° C. for about 3 hours. And a heat treatment process of removing the organic material by heat treatment at a temperature of about 600 ° C. for about 60 minutes, may be performed only once, and may be performed two or more times.

As described above, the inorganic dehumidification rotor manufactured using the method illustrated in FIG. 1 includes both the first inorganic component for low humidity dehumidification and the second inorganic component for high humidity dehumidification. Accordingly, the dehumidification performance is excellent for all humidity regions including low humidity and high humidity compared to the dehumidification rotor using a single dehumidifying agent.

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  Produce

Example  One

(a) 48 parts by weight of NaX zeolite was added to 44 parts by weight of a polyvinyl alcohol (PVA) solution having 1% by weight of solids, followed by stirring. Then, 8 parts by weight of 50% by weight of an acrylic emulsion binder was added and stirred to prepare 100 parts by weight of zeolite slurry. do. The zeolite slurry was impregnated with a thickness of 200 μm and a basis weight of 33 g / m ² glass fiber paper, followed by drying to prepare a zeolite-containing glass fiber paper.

(b) The glass fiber paper produced by the corrugation process to produce a corrugated cardboard height of 1.2mm, pitch 3.2mm single-sided.

(c) Single-sided corrugated paper is cut to 20mm in width and wound up to produce a honeycomb structure with a diameter of 240mm.

(d) 100% by weight of the honeycomb structure is impregnated with 25% by weight of an acidic silica sol solid and aged at 50 ° C for 24 hours in a closed state to form silica gel. After drying for 3 hours at 130 ℃ 60 ℃ heat treatment at 600 ℃ to remove the organics.

(e) The zeolite-silica gel honeycomb structure from which the organic matter was removed was impregnated in a silica sol for the second time to prepare a highly efficient dehumidifying rotor through gelation, aging and drying.

Example  2

(a) Zeolite impregnation, (b) single sided corrugated cardboard production, and (c) honeycomb structural body production were the same as in Example 1.

 (d) Honeycomb structure containing zeolite particles impregnated with 20% by weight of alumina sol gelled, aged at 50 ° C for 24 hours, dried at 130 ° C for 3 hours, and heat treated at 600 ° C for 60 minutes to apply activated alumina-zeolite A dehumidification rotor was produced.

Example  3

(a) Zeolite impregnation, (b) single sided corrugated cardboard production, and (c) honeycomb structural body production were the same as in Example 1.

(d) Gelation by impregnating a honeycomb structure containing zeolite particles with a silica sol-inorganic salt solution of 24% by weight of silica and 5% by weight of CaCl ₂ solids, gelling, aging at 50 ° C for 24 hours, and drying at 130 ° C for 3 hours. , Dehumidification rotor was coated with silica-CaCl ₂ -zeolite through heat treatment at 600 ℃ 60 minutes.

Example  4

(a) Zeolite impregnation, (b) single sided corrugated cardboard production, and (c) honeycomb structural body production were the same as in Example 1.

(d) H-form zeolite and slurry containing water glass were prepared and impregnated into the honeycomb structure containing zeolite particles, followed by gelation, aging at 50 ° C for 24 hours, drying at 130 ° C for 3 hours, and heat treatment at 600 ° C for 60 minutes. A dehumidifying rotor to which zeolite-silica gel was applied was prepared.

2. Measurement of physical properties

In order to evaluate the dehumidifying ability of the dehumidifying rotors prepared according to Examples 1 to 3, the physical property measuring method is a constant temperature for maintaining the dehumidifying rotor dried at 130 ° C, 25 ° C, 50% and 25 ° C, and 90% relative humidity, respectively. The weight of the absorbed moisture was measured by changing the weight of the dehumidifying rotor by leaving it in the humidifier for 30 minutes.

3. Property evaluation

The weight change (dehumidification amount) of the dehumidification rotors prepared in Examples 1 to 3 are shown in Table 1.

[Table 1]

25 ℃, 50% 25 ℃, 90% Example 1 25 g 29 g Example 2 24 g 26 g Example 3 26 g 32 g

Referring to Table 1, the dehumidification amount of the dehumidification rotors prepared according to Examples 1 to 3 is 24 to 26g at 50% relative humidity corresponding to low humidity, and 26 to 32g at 90% relative humidity corresponding to high humidity. Can be.

Considering that the dehumidification amount of the conventional low humidity dehumidification rotor is about 20g when the relative humidity is 50%, and the dehumidification amount of the normal high humidity dehumidification rotor is about 25g at the relative humidity of 90%, the dehumidification prepared according to Examples 1 to 3 It can be seen that the rotor exhibits an excellent dehumidification amount at both low and high humidity.

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.

1 is a flow chart showing a method for manufacturing a high efficiency inorganic dehumidifying rotor according to one embodiment of the present invention.

Claims (14)

(a) coating a low humidity dehumidifying first inorganic component on the inorganic fiber paper; (b) converting the inorganic fiber paper coated with the first inorganic component into a single-sided corrugated cardboard sheet; (c) winding the single-faced corrugated cardboard to produce a honeycomb structure; And (d) coating a second inorganic component for high humidity dehumidification on the honeycomb structure; A method for producing an inorganic dehumidifying rotor, characterized in that both the low humidity dehumidifying first inorganic component and the high humidity dehumidifying second inorganic component are contained in the manufactured inorganic dehumidifying rotor. The method of claim 1, The inorganic fiber paper is inorganic dehumidifying rotor manufacturing method comprising at least one inorganic fiber of glass fiber and ceramic fiber. 3. The method of claim 2, The inorganic fiber manufacturing method of the inorganic dehumidifying rotor, characterized in that it comprises at least 40% by weight of the total weight of the inorganic fiber paper. The method of claim 1, The inorganic fiber paper is inorganic dehumidifying rotor manufacturing method characterized in that it has a thickness of 50 ~ 700㎛. The method of claim 1, The low humidity dehumidifying first inorganic component is a method for manufacturing an inorganic dehumidifying rotor, characterized in that the zeolite. The method of claim 5, The step (a) A method of producing an inorganic dehumidifying rotor, wherein the slurry comprising the zeolite, the inorganic binder and the solvent is applied to the inorganic fiber paper and then dried. The method of claim 1, The high humidity dehumidifying second inorganic component is a method of manufacturing an inorganic dehumidifying rotor, characterized in that selected from porous silica gel, porous alumina gel, porous silica-alumina gel composite and porous silica gel-inorganic salt. The method of claim 7, wherein Step (d) (d1) applying or impregnating a coating liquid including a precursor of the second inorganic component for high humidity dehumidification in a sol state on the honeycomb structure; And (d2) converting the precursor of the second inorganic component for high humidity dehumidification in the sol state into a second inorganic component for high humidity dehumidification in the gel state by using a sol-gel method; Inorganic dehumidification rotor manufacturing method characterized in that. 9. The method of claim 8, The coating liquid containing the precursor of the high humidity dehumidifying second inorganic component further comprises an inorganic salt. 10. The method of claim 9, The inorganic salt is a method of manufacturing an inorganic dehumidifying rotor, characterized in that selected from CaCl ₂ , MgCl ₂ , LiCl ₂ , KCl and NaCl. 9. The method of claim 8, The step (d2) is an inorganic dehumidification rotor manufacturing method comprising a gelation (aging), aging (aging) process, drying process and heat treatment process. 9. The method of claim 8, The precursor of the high-humidity dehumidifying second inorganic component comprises a silica sol or a silane-based compound. 9. The method of claim 8, The precursor of the high humidity dehumidifying second inorganic component comprises a structure in which water glass and H-form zeolite are mixed. An inorganic dehumidifying rotor, manufactured using the manufacturing method according to any one of claims 1 to 13, comprising both a first inorganic component for low humidity dehumidification and a second inorganic component for high humidity dehumidification.

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