JP5037908B2 - Dehumidification rotor and manufacturing method thereof - Google Patents

Description

  The present invention relates to a dehumidification rotor used in a rotary regenerative dehumidifier that performs dehumidification of air to be treated with a dehumidifying agent and regeneration of the dehumidifying agent that has absorbed moisture, and continuously dehumidifies the air to be treated.

  A household dehumidifier is a rotary regenerative dehumidifier having a rotary dehumidification rotor carrying a dehumidifying agent and a heater for regenerating the dehumidifying agent. The household dehumidifier is used not only in summer when the absolute humidity is high, but also in winter when the absolute humidity is low, to dry laundry in the room and prevent condensation. Therefore, the dehumidifying rotor of the household dehumidifier needs to have excellent dehumidifying performance even under conditions where the absolute humidity is low.

  In the field of industrial dehumidifiers, the demand for lower humidity air is increasing. Especially in semiconductor manufacturing factories, the demand for so-called dry air that removes moisture that causes oxidation as much as possible is increasing. . Therefore, an industrial dehumidifier needs to have an excellent dehumidifying performance even under conditions where the absolute humidity is low.

  Zeolite is known as a substance capable of adsorbing moisture in the air having a low absolute humidity. Examples of the zeolite include Y-type zeolite, X-type zeolite, and A-type zeolite. Among these, Y-type zeolite can dehumidify moisture at a lower temperature than X-type zeolite or A-type zeolite. It is considered to be most suitable as a dehumidifying agent for a rotary regenerative dehumidifier that continuously dehumidifies.

  Generally, the zeolite obtained by synthesis is a sodium zeolite in which the cation that is a counter ion of the aluminum portion of the zeolite is a sodium ion. The sodium zeolite has a high moisture absorption rate even in air with a low absolute humidity, and exhibits excellent moisture absorption performance.

  Therefore, as a conventional dehumidifying rotor, one carrying the sodium zeolite has been used.

  However, the sodium zeolite has high hygroscopicity but low dehumidification. Therefore, a large amount of heat energy is required to dehumidify the sodium zeolite by heating to regenerate the hygroscopic performance of the sodium zeolite. That is, in the rotary regenerative dehumidifier, when the dehumidification rotor carrying the sodium zeolite is used, the heater temperature has to be increased.

  However, in recent years, on the basis of energy saving, it is preferable that the heater temperature of the rotary regenerative dehumidifier is low. And, when the heater temperature is low, the regeneration of the sodium zeolite is not sufficiently performed. Therefore, the dehumidification rotor on which the sodium zeolite is supported has a problem that the dehumidification performance becomes insufficient when the heater temperature is lower than the conventional temperature. was there.

A hydrogen ion-exchanged zeolite in which the counter ion of the aluminum part (Al—O ⁻ ) in the zeolite is ion-exchanged with a hydrogen ion is known as one that can be dehumidified at a lower temperature than the sodium zeolite. . However, when the hydrogen ion exchanged zeolite repeatedly absorbs and desorbs moisture at a high temperature, the zeolite skeleton contracts and the specific surface area decreases, so the dehumidification amount decreases rapidly at high temperatures, that is, easily deteriorates. . In the rotary regeneration dehumidifier, when a high-temperature heater is disposed in the vicinity of the dehumidification rotor, the dehumidification rotor is exposed to a high temperature. Therefore, the dehumidification rotor on which the hydrogen ion exchange zeolite is supported is not practical because the hydrogen ion exchange zeolite is rapidly deteriorated and the dehumidification amount is rapidly reduced.

  Accordingly, an object of the present invention is to provide a dehumidification rotor that has excellent dehumidifying performance even when the heater temperature is lower than that of the prior art, that is, has a high dehumidification amount and has a small decrease in dehumidification amount over time, that is, excellent durability. Is to provide.

  As a result of intensive studies to solve the above-described problems in the prior art, the present inventors have determined that (1) dehumidification performance is a dehumidification amount per rotation (hygroscopic amount-dehumidification) during continuous rotation. (2) a first layer containing a zeolite having a high specific surface area reduction rate and a low dehumidification peak temperature in a dehumidifying rotor, and a hydrothermal resistance test. Containing a zeolite having a low specific surface area reduction rate and a high dehumidification peak temperature, and forming a three-layer dehumidifier layer sandwiching the first layer, the high temperature passing through the dehumidification rotor The regeneration air first comes into contact with the second layer. Therefore, while dehumidifying moisture, the heat of vaporization is deprived to lower the temperature, and then comes into contact with the first layer. As a result, the temperature of the regeneration air is low when contacting the first layer, so that the first layer zeolite is less likely to deteriorate, and the first layer zeolite is less than the second layer zeolite. Since it is also a zeolite that can be dehumidified at low temperatures, it is regenerated even when the temperature of the regeneration air is lowered. Therefore, it has been found that the amount of dehumidification per rotation of the dehumidification rotor is increased, and the present invention has been completed.

That is, the present invention (1) is a dehumidification rotor in which two or more types of zeolite are supported on the fibrous carrier of the dehumidification rotor, and the counter ion of the aluminum part in the original zeolite is converted to hydrogen ions on the fibrous carrier. Hydrogen ion-exchanged zeolite obtained by performing a hydrogen ion-exchange process to obtain a hydrogen-ion-exchanged zeolite by ion exchange, or hydrogen ions obtained by ion-exchange of the counter ion at the aluminum site in the original zeolite with hydrogen ions An exchange step, and a second metal ion exchange step of obtaining a second metal ion exchange zeolite by ion exchange of hydrogen ions in the hydrogen ion exchange zeolite with a second metal ion other than the counter ion of the aluminum part of the original zeolite. The first layer containing the second metal ion exchanged zeolite obtained and the original zeolite Dehumidifying agent layer of a three-layer structure comprising a second layer sandwiching the first layer and is formed, the raw zeolite is sodium zeolite, and, that said second metal ion is non-sodium ion A dehumidifying rotor is provided.

Further, the present invention (2) is a dehumidification rotor in which two or more types of zeolite are supported on the fibrous carrier of the dehumidification rotor, and the decrease rate of the specific surface area in the hydrothermal resistance test is 15 to A three-layer dehumidifier comprising a first layer containing 50% zeolite and a zeolite having a specific surface area reduction rate of 0 to 10% in a hydrothermal resistance test, and a second layer sandwiching the first layer layers are formed, Ri difference 1 to 60 ° C. der dehumidifying peak temperature of the zeolite contained in more dehumidified peak temperature and said zeolite contained in the second layer, said second a zeolite sodium zeolite contained in the layer, and, in which the zeolite contained in said first layer to provide a dehumidification rotor and said zeolite der Rukoto which is ion-exchanged with non-sodium ions.

The present invention (3) also provides a molding process for obtaining a rotor-shaped fibrous carrier by molding a sheet-shaped fibrous carrier, and the rotor-shaped fibrous carrier containing a first layer zeolite. A first layer forming step of obtaining a rotor-shaped fibrous carrier in which a first layer is formed by dipping or coating with a slurry for forming a single layer, and a rotor-shaped fiber in which the first layer is formed A second layer forming step of obtaining a dehumidification rotor by dipping or coating with a slurry for forming a second layer containing a second layer zeolite, wherein the first layer zeolite is contained in the original zeolite Hydrogen ion exchange zeolite obtained by performing a hydrogen ion exchange process to obtain hydrogen ion exchanged zeolite by ion exchange of the counter ion of aluminum part with hydrogen ion, or the counter ion of aluminum part in raw zeolite A hydrogen ion exchange step to obtain a hydrogen ion exchanged zeolite by ion exchange on, and ion exchange of the hydrogen ions in the hydrogen ion exchanged zeolite with a second metal ion other than the counter ion of the aluminum part of the original zeolite, bimetallic ion exchange is zeolite a second metal ion-exchange step the second metal ion-exchange zeolite obtained performed to obtain, second layer zeolite, raw zeolite der is, the raw zeolite is sodium zeolite, and, in which said second metal ion to provide a method of manufacturing a dehumidifying rotor and said non-sodium ion der Rukoto.

Further, the present invention (4) is a sheet-like fibrous carrier in which a first layer is formed by immersing or coating a sheet-like fibrous carrier with a slurry for forming a first layer containing a first layer zeolite. First layer forming step for obtaining a fibrous carrier, forming a sheet-like fibrous carrier on which the first layer is formed, and forming a rotor-shaped fibrous carrier on which the first layer is formed Step and formation of a second layer to obtain a dehumidifying rotor by subjecting the rotor-shaped fibrous carrier on which the first layer is formed to a dipping or coating treatment with a slurry for forming a second layer containing a second layer zeolite A hydrogen ion-exchanged zeolite obtained by performing a hydrogen ion exchange step in which the first layer zeolite is subjected to ion exchange of a counter ion of an aluminum site in the original zeolite with hydrogen ions to obtain a hydrogen ion-exchanged zeolite, or Zeora A hydrogen ion exchange step for obtaining a hydrogen ion-exchanged zeolite by ion-exchange of the counter ion at the aluminum site in the catalyst with hydrogen ions, and the hydrogen ion in the hydrogen ion-exchanged zeolite other than the counter ion at the aluminum site of the original zeolite. by ion-exchange in two metal ion, a second metal ion-exchange zeolite obtained performed a second metal ion-exchange step to obtain a second metal ion-exchange zeolite, the second layer zeolite, Ri original zeolite der, the original zeolite is sodium zeolite, and, in which said second metal ion to provide a method of manufacturing a dehumidifying rotor and said non-sodium ion der Rukoto.

Further, the present invention (5) is a sheet-like fibrous carrier in which a first layer is formed by immersing or coating a sheet-like fibrous carrier with a slurry for forming a first layer containing a first layer zeolite. A first layer forming step for obtaining a fibrous carrier, a sheet-like fibrous carrier on which the first layer is formed, is immersed in or coated with a slurry for forming a second layer containing a second layer zeolite, A second layer forming step for obtaining a sheet-like fibrous carrier in which the first layer and the second layer are formed, and a sheet-like fibrous carrier in which the first layer and the second layer are formed in a rotor shape A hydrogen ion exchange step of obtaining a hydrogen ion exchanged zeolite by ion exchange of the counter ion of the aluminum part in the original zeolite with hydrogen ions. Hydrogen ions obtained by A hydrogen ion exchange step for obtaining a hydrogen ion-exchanged zeolite by ion-exchange of the counter ion of the aluminum site in the zeolite or the original zeolite with hydrogen ions, and the hydrogen ion in the hydrogen ion-exchanged zeolite in the aluminum site of the original zeolite A second metal ion exchange zeolite obtained by performing a second metal ion exchange step of obtaining a second metal ion exchange zeolite by ion exchange with a second metal ion other than a counter ion, wherein the second layer zeolite is an original zeolite der is, raw zeolite is sodium zeolite, and, in which said second metal ion to provide a method of manufacturing a dehumidifying rotor and said non-sodium ion der Rukoto.

  According to the present invention, it is possible to provide a dehumidification rotor that has a large amount of dehumidification and a small decrease in the dehumidification amount over time, that is, excellent durability even when the heater temperature is lower than that of the prior art.

  The dehumidification rotor of the present invention is a dehumidification rotor in which two or more types of zeolite are supported on the fibrous carrier of the dehumidification rotor, and the decrease rate of the specific surface area in the hydrothermal resistance test is 15 to 50%. A dehumidifying agent layer having a three-layer structure is formed which includes a first layer containing zeolite and a zeolite having a specific surface area reduction rate of 0 to 10% in a hydrothermal resistance test, and a second layer sandwiching the first layer. The difference between the dehumidification peak temperature of the zeolite contained in the second layer and the dehumidification peak temperature of the zeolite contained in the first layer is 1 to 60 ° C. A ventilation cavity is formed in the dehumidification rotor to ventilate the air to be treated and the regeneration air in parallel to the rotation axis direction.

  The dehumidification rotor of this invention is demonstrated with reference to FIGS. 1-3. FIG. 1 is a schematic view showing a dehumidification rotor according to an embodiment of the present invention, FIG. 2 is an enlarged view of portion A of the opening surface of the dehumidification rotor, and FIG. 3 is a flat portion of the dehumidification rotor. Or it is an enlarged view of a cross section when a corrugated part is cut | disconnected by the surface orthogonal to the direction in which the ventilation | gas_flowing cavity is formed. In FIG. 1, a ventilation cavity 4 is formed in the dehumidifying rotor 1 in parallel with the rotational axis direction to vent the air to be treated and the regenerated air. Opening surfaces 3a and 3b which are openings of the ventilation cavity 4 are provided. The opening surfaces 3a and 3b are entrances and exits for the air to be treated and the regeneration air. The dehumidifying rotor 1 has a center hole 2 for attaching a rotor shaft in the vicinity of the center. As shown in FIG. 2, the ventilation cavity 4 is formed by alternately laminating flat portions 5 and corrugated portions 6. As shown in FIG. 3, the fibrous carrier 7 of the dehumidifying rotor 1 has a first layer 8 formed by supporting zeolite on the fibrous carrier 7 and a first layer 8 sandwiching the first layer 8. A dehumidifying agent layer 10 having a three-layer structure composed of two layers 9 is formed. The first layer 8 contains a zeolite, and the second layer 9 contains a different type of zeolite from the first layer 8. Hereinafter, in order to distinguish between the zeolite contained in the first layer 8 and the zeolite contained in the second layer 9, the zeolite contained in the first layer 8 is referred to as a first layer zeolite. The zeolite contained in the second layer 9 is referred to as a second layer zeolite. In other words, two different types of zeolite are supported on the fibrous carrier 7 of the dehumidifying rotor 1, and more specifically, the first layer is supported on the fibrous carrier 7 of the dehumidifying rotor 1. Zeolite is supported, and the second layer zeolite is supported on the first layer zeolite. The first layer zeolite is also carried in the fiber gaps (interfiber gaps) of the fibrous carrier 7.

  As shown in FIG. 2, the fibrous carrier 7 of the dehumidifying rotor 1 has a honeycomb structure. The fibrous carrier 7 having the honeycomb structure includes, for example, a porous flat fibrous carrier and a corrugated fibrous carrier obtained by corrugating the flat fibrous carrier, using an inorganic adhesive or an organic adhesive. Are used to bond and stack at the peak of the corrugated fibrous carrier. At this time, since a substantially semi-cylindrical cavity formed between the flat fibrous carrier and the corrugated fibrous carrier serves as an air flow path, both of the hollows rotate the dehumidifying rotor 1. They are stacked so as to be formed in the axial direction. As a method of performing the lamination, for example, a method of laminating a pair of the flat fibrous carrier and the corrugated fibrous carrier, winding up into a roll shape, and laminating can be mentioned. Although FIGS. 1 to 3 show the fibrous carrier 7 having a honeycomb structure, the structure of the fibrous carrier 7 is not limited thereto, and a ventilation cavity is formed in a direction parallel to the rotor shaft. It only has to be.

  The fibrous carrier is a woven or non-woven fabric formed from fibers. The fiber is not particularly limited, and glass fiber such as E glass fiber, NCR glass fiber, ARG fiber, ECG fiber, S glass fiber, and A glass fiber, and its chopped strand, ceramic fiber, alumina fiber, mullite fiber, silica Examples thereof include inorganic fibers and organic fibers such as fibers, rock wool fibers, and carbon fibers. As the organic fiber, an aramid fiber, a nylon fiber, a polyethylene terephthalate fiber, or the like can be used. It is preferable to use inorganic fibers as the fibers of the fibrous carrier because the strength of the dehumidifying rotor can be increased.

Examples of the fibers forming the fibrous carrier include biosoluble inorganic fibers. The biologically soluble inorganic fiber refers to an inorganic fiber having a physiological saline dissolution rate at 40 ° C. of 1% or more. More specifically, examples of the biologically soluble inorganic fibers include those disclosed in JP 2000-220037, JP 2002-68777, JP 2003-73926, or JP 2003-212596. inorganic fibers described, that is, the total content of SiO ₂ and CaO is more than 85 mass%, 0.5 to 3.0 wt% MgO and 2.0 to 8.0 wt% of _P 2 O ₅ and an inorganic fiber having a carcinogenicity index (KI value) of 40 or more according to German hazardous substance regulations, SiO ₂ , MgO and TiO ₂ as essential components, SiO ₂ , MgO and manganese oxide are essential inorganic fibers as a _component, SiO 2 52 to 72 wt%, _Al less than 2 _{O 3} 3 wt%, MgO 0 to 7 wt%, CaO 7.5 to 9.5 _wt%, B 2 _{O 3} 12 wt%, BaO 0 to 4 wt%, SrO 0 to 3.5 _wt%, Na 2 O from 10 to 20.5 _wt%, K 2 O 0.5 to 4.0 wt% and _P 2 _O 5 0 An inorganic fiber containing -5 mass% is mentioned. The biosoluble inorganic fiber may be one type or a combination of two or more types.

A method for measuring the physiological saline dissolution rate will be described. First, 1000 mg of a sample obtained by grinding inorganic fibers to 200 mesh or less and 150 ml of physiological saline are placed in an Erlenmeyer flask (300 ml) and placed in an incubator at 40 ° C. The Erlenmeyer flask is then subjected to horizontal shaking at 120 revolutions per minute for 50 hours. After shaking, the mixture is filtered, and the concentration (mg / L) of each element is measured by ICP emission analysis for silicon, magnesium, calcium and aluminum contained in the obtained filtrate. Then, the physiological saline dissolution rate C (%) is calculated from the concentration of each element and the content (mass%) of each element in the inorganic fiber before dissolution by the following formula (1). The concentration of each element obtained by ICP emission analysis is as follows: silicon element concentration: a1 (mg / L), magnesium element concentration: a2 (mg / L), calcium element concentration: a3 (mg / L) and The aluminum element concentration a4 (mg / L), the content of each element in the inorganic fiber before dissolution, silicon element content: b1 (mass%), magnesium element content: b2 (mass%), Calcium element content: b3 (mass%) and aluminum element content: b4 (mass%).
C (%) = {filtrate amount (L) × (a1 + a2 + a3 + a4) × 100} / {amount of inorganic fiber before dissolution (mg) × (b1 + b2 + b3 + b4) / 100} (1)

  The fibrous carrier is a porous body having a large number of voids between the fibers of the fibrous carrier. The inter-fiber porosity of the fibrous carrier is usually 80 to 95%, and the thickness of the fibrous carrier is usually 0.05 to 1 mm. The inter-fiber porosity is a portion obtained by subtracting the volume of fibers in the fibrous carrier from the apparent volume of the fibrous carrier (hereinafter also referred to as inter-fiber void), and the apparent volume of the fibrous carrier. The percentage of the total. And since this fibrous support | carrier is a porous body, this 1st layer zeolite is carry | supported also by the space | gap between fibers of this fibrous support | carrier 7. FIG.

  In the description of the dehumidifying rotor 1, the dehumidifying rotor 1 is obtained by forming a flat fibrous carrier into the shape of a dehumidifying rotor and then supporting zeolite on the obtained molded product. However, in the dehumidification rotor of the present invention, first, a flat fibrous carrier carrying the first layer zeolite and the second layer zeolite is prepared, and then the carrier sheet is dehumidified. It may be obtained by molding into the shape of a rotor. First, the first layer zeolite is supported on a flat fibrous carrier, and then the flat layer formed with the first layer is formed. It may be obtained by forming a fibrous carrier into the shape of a dehumidifying rotor and then supporting the second layer zeolite on the rotor-shaped fibrous carrier formed with the one layer.

The framework structure of the first layer zeolite contained in the first layer 8 and the second layer zeolite contained in the second layer 9 is not particularly limited, and is A type, X type, faujasite. Examples include molds. Among these, the faujasite type is preferable in terms of low dehumidification peak temperature, and the Y type is particularly preferable among the faujasite types. And this 1st layer zeolite and this 2nd layer zeolite are the following general formula (1):
aM _x O _y · Al ₂ O ₃ · bSiO ₂ (1)
(In the formula, M represents sodium, calcium, rare earth, zinc, tin, lithium, magnesium, potassium, manganese, iron, and the values of x and y are integers of 1 or more, and depend on the valence of M, The value of is 0.5 to 5, and the value of b is 1 to 20.)
It is represented by

  The reduction rate of the specific surface area in the hydrothermal resistance test of the first layer zeolite is 15 to 50%, preferably 15 to 40%, particularly preferably 15 to 30%. Since the reduction rate of the specific surface area in the hydrothermal resistance test of the first layer zeolite is in the above range, the dehumidification amount of the dehumidification rotor is practically hardly lowered, so that the initial dehumidification amount is maintained over a long period of time. When the decrease rate of the specific surface area in the hydrothermal resistance test of the first layer zeolite is less than 15%, the dehumidification amount of the dehumidification rotor decreases under the condition that the heater temperature of the dehumidifier is low, and when it exceeds 50%, In practice, the dehumidification amount of the dehumidification rotor is lowered, and the initial dehumidification amount cannot be maintained over a long period of time.

  The reduction rate of the specific surface area in the hydrothermal resistance test of the second layer zeolite is 0 to 10%, preferably 0 to 8%, particularly preferably 0 to 5%. Since the decrease rate of the specific surface area in the hydrothermal resistance test of the second layer zeolite is in the above range, the zeolite is not easily deteriorated even when exposed to high temperatures, so the decrease in the dehumidification amount of the dehumidification rotor with time is reduced. That is, the durability of the dehumidifying rotor is increased. If the reduction rate of the specific surface area in the hydrothermal resistance test of the second layer zeolite exceeds 10%, the zeolite is likely to be deteriorated, so that the dehumidification amount of the dehumidification rotor during the time conversion is rapidly reduced.

The hydrothermal resistance test according to the present invention is performed according to the following procedure.
(1) Into a glass sample bottle having an inner diameter of 30 mm and a height of 30 mm that is open at the top, 1 to 4 zeolites of 0.5 to 2 g are placed in a pressure vessel having a volume of 2 L. At this time, the installation position of the sample bottle is set to be above the surface of the distilled water to be put into the pressure vessel later, and the opening of the sample bottle is prevented so that condensed water does not fall into the sample bottle. Install a dew condensation fall prevention device above.
(2) 500 ml of distilled water is put into the pressure vessel, and the pressure vessel is sealed.
(3) The pressure vessel is heated to 105 ° C., and the zeolite is exposed to water vapor at 105 ° C. and 0.12 MPa for 48 hours.
(4) After 48 hours, the pressure vessel is cooled, the pressure vessel is opened, the zeolite is taken out, and the zeolite after the test is obtained.
Then, the specific surface area B (mm ² / g) of the zeolite before the hydrothermal resistance test and the specific surface area C (mm ² / g) of the zeolite after the hydrothermal resistance test were measured, and the specific surface area was calculated by the following formula (3). Decrease rate D (%) is calculated.
D = {(BC) / B} × 100 (3)
The rate of decrease of the specific surface area in the hydrothermal resistance test is an index indicating the ease of deterioration when the zeolite is repeatedly dehumidified at a high temperature, that is, the rate of decrease in the dehumidification amount over time. A zeolite with a low specific surface area reduction rate in the hydrothermal resistance test is less likely to deteriorate even after repeated dehumidification at high temperatures, while a zeolite with a high specific surface area reduction rate in the hydrothermal resistance test is dehumidified at high temperatures. It is easy to deteriorate when repeated.

  The difference between the dehumidification peak temperature of the second layer zeolite and the dehumidification peak temperature of the single layer zeolite (dehumidification peak temperature of the second layer zeolite−dehumidification peak temperature of the single layer zeolite) is 1 to 60 ° C., preferably It is 2-40 degreeC, Most preferably, it is 3-20 degreeC, More preferably, it is 3-18 degreeC, More preferably, it is 3-15 degreeC. When the difference in the dehumidification peak temperature is within the above range, the dehumidification amount of the dehumidification rotor is increased. That is, the dehumidification peak temperature of the first layer zeolite is 1 to 60 ° C., preferably 2 to 40 ° C., particularly preferably 3 to 20 ° C. lower than the dehumidification peak temperature of the second layer zeolite. Preferably it is 3-18 degreeC low, More preferably, it is 3-15 degreeC low.

  The dehumidification peak temperature of the first layer zeolite is preferably 70 to 160 ° C, particularly preferably 100 to 155 ° C, and further preferably 120 to 145 ° C. When the dehumidification peak temperature of the first layer zeolite is in the above range, the dehumidification amount of the dehumidification rotor is increased. Further, when the dehumidifying peak temperature of the first layer zeolite exceeds 160 ° C., the dehumidifying amount of the dehumidifying rotor decreases. Moreover, it is difficult to synthesize zeolite having a dehumidification peak temperature of less than 70 ° C.

  The dehumidification peak temperature of the second layer zeolite is preferably 120 to 200 ° C, particularly preferably 125 to 180 ° C, and more preferably 130 to 160 ° C. When the dehumidification peak temperature of the second layer zeolite is in the above range, the dehumidification amount of the dehumidification rotor is increased. Further, when the dehumidification peak temperature of the second layer zeolite exceeds 200 ° C., the dehumidification amount of the dehumidification rotor is reduced under the condition that the heater temperature of the dehumidifier is low. In addition, zeolite with a low dehumidification peak temperature tends to have a large decrease in specific surface area in the hydrothermal resistance test. Therefore, if the dehumidification peak temperature of the second layer zeolite is less than 120 ° C, the zeolite is likely to deteriorate. In addition, the dehumidification amount of the dehumidification rotor decreases with time.

  In the present invention, the dehumidifying peak temperature is a value determined as follows. First, the zeolite is allowed to stand at 25 ° C. and 50% RH until saturation is reached, and moisture is adsorbed. Next, 20 mg of zeolite adsorbed with water is sampled, and the temperature required for dehumidification is measured by raising the temperature from room temperature to 600 ° C. at 10 ° C./min with a differential scanning calorimeter. And let the temperature of the peak top of the energy curve required for the dehumidification obtained be this dehumidification peak temperature. The dehumidification peak temperature is an index indicating the ease of dehumidification when the temperature is lowered. For example, the dehumidification peak temperature of zeolite a is 150 ° C., and the dehumidification peak temperature of zeolite b is 100 ° C. If it is, the lower limit of the temperature at which the zeolite b can be dehumidified is lower than the lower limit of the temperature at which the zeolite a can be dehumidified. The dehumidifying peak temperature does not directly indicate the temperature at which the zeolite is completely dehumidified.

The relationship between the decrease rate of the specific surface area and the dehumidification peak temperature in the hydrothermal resistance test of zeolite and the number of acid sites where the counter ion of the aluminum part (Al—O ⁻ ) in the zeolite is a hydrogen ion will be described. The greater the number of acid sites in the zeolite, the easier it is to cause shrinkage of the skeletal structure when repeated moisture absorption and desorption at high temperatures, so the specific surface area tends to decrease due to repeated moisture absorption and desorption. That is, the reduction rate of the specific surface area in the hydrothermal resistance test increases. Also, the more acid sites in the zeolite, the lower the dehumidification peak temperature.

  Further, in zeolites synthesized by a known synthesis method and not subjected to ion exchange treatment (hereinafter, zeolite not subjected to ion exchange treatment is also referred to as original zeolite), the acid point is There is little or even a small amount. For example, in the case of a raw zeolite in which the counter ion at the aluminum site is a sodium ion, most of the counter ion at the aluminum site is a sodium ion. Therefore, the raw zeolite has a low reduction rate of the specific surface area in the hydrothermal resistance test and a high dehumidification peak temperature.

  On the other hand, when the counter ion of the aluminum portion of the original zeolite is ion-exchanged to hydrogen ion by a known method, more than half of the counter ions of the aluminum portion are hydrogen ions (hereinafter also referred to as hydrogen ion-exchanged zeolite). Is obtained). The number of acid sites in the hydrogen ion exchanged zeolite is greater than the number of acid sites in the raw zeolite. Therefore, the hydrogen ion-exchanged zeolite has a higher specific surface area reduction rate in the hydrothermal resistance test and a lower dehumidification peak temperature than the original zeolite.

  And when the hydrogen ion of this hydrogen ion exchanged zeolite is ion-exchanged with a 2nd metal ion by a well-known method, the ion exchanged by this 2nd metal ion (henceforth a 2nd metal ion exchanged zeolite is also described. ) Is obtained. In the present invention, the second metal ion refers to a metal ion different from the counter ion of the aluminum portion of the original zeolite before ion exchange with hydrogen ions. In the ion exchange with the second metal ion, not all of the hydrogen ions of the hydrogen ion-exchanged zeolite are ion-exchanged with the second metal ion. An acid point where the counter ion of the site remains a hydrogen ion remains. Therefore, the number of acid sites in the second metal ion exchange zeolite is larger than the number of acid sites in the raw zeolite. Therefore, the second metal ion-exchanged zeolite has a higher specific surface area reduction rate in the hydrothermal resistance test and a lower dehumidification peak temperature than the original zeolite.

  And the reduction | decrease rate of the specific surface area in the hydrothermal resistance test of this original zeolite is 0-8%, and a dehumidification peak temperature is 125-160 degreeC. Moreover, the reduction rate of the specific surface area in the hydrothermal resistance test of the hydrogen ion-exchanged zeolite is 15 to 45%, and the dehumidification peak temperature is 80 to 140 ° C. The reduction rate of the specific surface area in the hydrothermal resistance test of the second metal ion-exchanged zeolite is 15 to 40%, and the dehumidification peak temperature is 100 to 150 ° C. That is, the raw zeolite satisfies the requirements of the first layer zeolite, and the hydrogen ion exchange zeolite and the second metal ion exchange zeolite satisfy the requirements of the second layer zeolite. And the reduction rate of the specific surface area in the hydrothermal resistance test of the raw zeolite is preferably 0 to 5%, and the dehumidification peak temperature is preferably 130 to 145 ° C. Moreover, the reduction rate of the specific surface area in the hydrothermal resistance test of the hydrogen ion-exchanged zeolite is preferably 15 to 40%, and the dehumidification peak temperature is preferably 90 to 120 ° C. Moreover, the reduction rate of the specific surface area in the hydrothermal resistance test of the second metal ion-exchanged zeolite is preferably 15 to 30%, and the dehumidification peak temperature is preferably 120 to 140 ° C.

  Accordingly, the first layer zeolite includes the hydrogen ion exchange zeolite or the second metal ion exchange zeolite, and the second layer zeolite includes the original zeolite.

  That is, as the second layer zeolite, sodium zeolite that is the original zeolite and the counter ion of the aluminum part is sodium ion, calcium zeolite that is the original zeolite and the counter ion of the aluminum part is calcium ion, Or the potassium zeolite which is this original zeolite and the counter ion of this aluminum site | part is a potassium ion is mentioned. Since most of the raw zeolite produced industrially is sodium zeolite, it is preferable that the second layer zeolite is the sodium zeolite because it is inexpensive.

  The raw zeolite is produced using a known zeolite production method.

  Examples of the first layer zeolite include the hydrogen ion exchanged zeolite obtained by performing a hydrogen ion exchange step in which the counter ion at the aluminum portion of the original zeolite is ion exchanged with hydrogen ions to obtain the hydrogen ion exchanged zeolite. It is done.

  Further, as the first layer zeolite, the counter ion at the aluminum portion of the original zeolite is ion-exchanged with hydrogen ions, and the hydrogen ion exchange step for obtaining the hydrogen ion-exchanged zeolite and the hydrogen ions of the hydrogen ion-exchanged zeolite are obtained. The second metal ion, that is, the second metal obtained by ion exchange with the metal ion different from the counter ion of the aluminum part of the original zeolite ion-exchanged in the hydrogen ion exchange step to obtain the second metal ion-exchanged zeolite The second metal ion exchange zeolite obtained by performing an ion exchange step is mentioned.

  In the hydrogen ion exchange step related to the hydrogen ion exchange zeolite and the second metal ion exchange zeolite, the method for ion exchange of the counter ion at the aluminum portion of the original zeolite with hydrogen ions is not particularly limited, and any known This method may be used. For example, the hydrogen ion exchange step is performed by immersing the original zeolite in an aqueous ammonium chloride solution, exchanging ions with ammonium ions, and then drying and firing.

  Further, when the original zeolite is used as the second layer zeolite, the original zeolite used in the hydrogen ion exchange step may be the same as the original zeolite used as the second layer zeolite, or a counter ion or Zeolite having a different skeleton structure may be used.

  The second metal ion in the second metal ion exchange step is not particularly limited as long as it is a metal ion different from the counter ion of the aluminum portion of the original zeolite ion-exchanged in the hydrogen ion exchange step. Ion, zinc ion, tin ion, etc. are mentioned.

  The method for ion-exchange of hydrogen ions of the hydrogen ion-exchanged zeolite obtained by the hydrogen ion exchange step with the second metal ions is not particularly limited, and any known method may be used. For example, the second metal ion exchange step includes a method of immersing the hydrogen ion exchange zeolite in an aqueous solution containing the second metal ion. The aqueous solution containing the second metal ion can be obtained, for example, by mixing rare earth, zinc or tin, for example, chloride salt, sulfate, nitrate, etc. with water. Moreover, after performing ion exchange by this 2nd metal ion exchange process, this 2nd metal ion exchange zeolite can be wash | cleaned or dried as needed.

  As described above, since many of the raw zeolites industrially produced are sodium zeolite, the first layer zeolite ion-exchanges sodium ions of the sodium zeolite, which is the raw zeolite, with hydrogen ions. The hydrogen ion exchange step for obtaining an ion exchange zeolite, and the second metal ion exchange step for obtaining the second metal ion exchange zeolite by ion exchange of the hydrogen ions of the hydrogen ion exchange zeolite with the second metal ion. The second metal ion-exchanged zeolite is preferable because it is inexpensive. That is, the first layer zeolite is preferably a non-sodium zeolite in which the counter ion at the aluminum site is a metal ion other than sodium ions.

  In addition, it is preferable that the second metal ion is a rare earth ion in that the heater temperature can be lowered because the dehumidification peak temperature of the first layer zeolite is low. That is, the first layer zeolite is preferably a rare earth zeolite in which the counter ion at the aluminum site is a rare earth ion.

The crystal structure of the zeolite, the type of counter ion of the aluminum part, the silica / alumina ratio (SiO ₂ / Al ₂ O ₃ ), etc. are selected, or the type of ions used for ion exchange, the concentration of ions, the temperature, By selecting ion exchange conditions such as time, pH, etc., and adjusting the number of acid sites in the zeolite, the reduction rate of the specific surface area and the dehumidification peak temperature in the hydrothermal resistance test are A zeolite that satisfies the requirements of the second layer zeolite can be obtained.

  The thickness of the first layer 8 including the fibrous carrier 7 is 0.05 to 2 mm, preferably 0.1 to 0.15 mm. When the thickness of the first layer 8 is in the above range, the dehumidification amount of the dehumidification rotor is increased even under a condition where the heater temperature is low. If the amount of the first layer zeolite supported is small, most of the first layer zeolite may be supported in the interfiber spaces of the fibrous carrier 7. In this case, the thickness of the first layer 8 is almost the same as the thickness of the fibrous carrier 7.

  The thickness of the second layer 9 is 0.01 to 0.2 mm, preferably 0.05 to 0.15 mm. When the thickness of the second layer 9 is in the above range, the dehumidifying performance of the dehumidifying rotor is increased.

  The ratio of the carrying amount of the first layer 8 to the carrying amount of the second layer 9 (mass ratio, the first layer: the second layer) is preferably 10:90 to 90:10, particularly preferably 20: 80-50: 50. Since the ratio of the loading amount of the first layer 8 and the loading amount of the second layer 9 is within the above range, the dehumidification amount is large and the durability is excellent even when the heater temperature is lower than the conventional temperature. The effect of the invention is enhanced.

  In addition to the first layer zeolite, the first layer 8 includes various functional agents such as a binder, a deodorizing agent, and a catalyst for supporting the first layer zeolite on the fibrous carrier 7, and a reinforcing agent. Can be contained.

  In addition to the second layer zeolite, the second layer 9 is a binder for supporting the second layer zeolite on the first layer 8, or various functional agents such as a deodorant and a catalyst, A reinforcing agent can be contained.

  The binder contained in the first layer 8 and the second layer 9 is not particularly limited, and examples thereof include silica, alkali silicate, alumina, titania and the like. Moreover, it does not restrict | limit especially as a functional agent contained in this 1st layer 8 and this 2nd layer 9, For example, a talc, a silica powder, manganese dioxide etc. are mentioned.

  The dehumidifying agent layer 10 having a three-layer structure composed of the first layer 8 and the second layer 9 first supports the first layer zeolite on the fibrous carrier 7 to form the first layer 8. Subsequently, the second layer zeolite is formed on both surfaces of the first layer 9 by supporting the second layer zeolite. The first layer zeolite is also supported in the interfiber gap of the fibrous carrier.

  The method for supporting the first layer zeolite is not particularly limited, and the fibrous carrier 7 is dipped or coated with a slurry containing the first layer zeolite, then dried, and if necessary, There is a method of calcining at about 300 to 600 ° C. The method for supporting the second layer zeolite is not particularly limited, and the fibrous carrier 7 on which the first layer is formed is used as the second layer zeolite. A method of immersing or coating with a slurry containing, followed by drying and firing at about 300 to 600 ° C. as necessary.

The following method is mentioned as a method of manufacturing the dehumidification rotor of this invention.
(I) A method for manufacturing a dehumidifying rotor according to the first aspect of the present invention (hereinafter also referred to as a manufacturing method according to the first aspect of the present invention) is obtained by forming a sheet-like fibrous carrier into a rotor shape. Forming process step (A) to obtain a fibrous carrier of the above, the rotor-shaped fibrous carrier is immersed or coated with a slurry for forming a first layer containing a first layer zeolite, then dried, A first layer forming step (A) for obtaining a rotor-shaped fibrous carrier in which a single layer is formed, and a rotor-shaped fibrous carrier in which the first layer is formed in a first layer containing a second-layer zeolite. It has a second layer forming step (A) for obtaining a dehumidification rotor by dipping treatment or coating treatment with a slurry for two layer formation and then drying.
(Ii) A method for manufacturing a dehumidification rotor according to the second aspect of the present invention (hereinafter also referred to as a manufacturing method according to the second aspect of the present invention) includes a sheet-like fibrous carrier and a first layer zeolite. First layer forming step (B) for obtaining a sheet-like fibrous carrier on which a first layer is formed by dipping treatment or coating treatment with the slurry for forming the first layer, and then drying, the first layer A sheet-like fibrous carrier formed with a molding process (B) to obtain a rotor-shaped fibrous carrier with a first layer formed, and the first layer formation is formed A second layer forming step (B) in which the rotor-shaped fibrous carrier is dipped or coated with a slurry for forming a second layer containing a second layer zeolite and then dried to obtain a dehumidified rotor. .
(Iii) A method for producing a dehumidification rotor according to the third aspect of the present invention (hereinafter also referred to as a production method according to the third aspect of the present invention) comprises a sheet-like fibrous carrier and a first layer zeolite. A first layer forming step (C) for obtaining a sheet-like fibrous carrier on which a first layer is formed by dipping or coating with a slurry for forming a first layer, and then drying the slurry. The sheet-like fibrous carrier formed with the second layer forming slurry containing the second layer zeolite is dipped or coated, and then dried to form the first layer and the second layer. A second layer forming step (C) to obtain a sheet-like fibrous carrier, and the sheet-like fibrous carrier on which the first layer and the second layer are formed into a rotor shape, and a dehumidifying rotor A molding process (C) for obtaining

  That is, the manufacturing method according to the first aspect of the present invention, the manufacturing method according to the second aspect of the present invention, and the manufacturing method according to the third aspect of the present invention are different in the dehumidifying rotor at the time of performing the forming step for forming the rotor shape. It is a manufacturing method. Therefore, the manufacturing method of the first aspect of the present invention, the manufacturing method of the second aspect of the present invention, and the manufacturing method of the third aspect of the present invention include the first layer forming step and the second layer forming step. Although the shape of the fibrous carrier used is different, the formation method of the first layer and the second layer is the same.

  The fibrous carrier according to the manufacturing method of the first aspect of the present invention, the manufacturing method of the second aspect of the present invention and the manufacturing method of the third aspect of the present invention, and the fibrous carrier according to the dehumidifying rotor of the present invention Is the same.

  The first layer zeolite and the second layer zeolite according to the production method of the first aspect of the present invention, the production method of the second aspect of the present invention and the production method of the third aspect of the present invention are the dehumidification of the present invention. This is the same as the first layer zeolite and the second layer zeolite related to the rotor. The same applies to the relationship between the decrease rate of the specific surface area and the dehumidification peak temperature in the hydrothermal resistance test between the first layer zeolite and the second layer zeolite.

  The first layer zeolite according to the production method of the first aspect of the present invention, the production method of the second aspect of the present invention, and the production method of the third aspect of the present invention is preferably the hydrogen ion exchange zeolite or The second metal ion-exchanged zeolite, the second layer zeolite according to the production method of the first aspect of the present invention, the production method of the second aspect of the present invention and the production method of the third aspect of the present invention, The raw zeolite is preferred.

  The first layer forming slurry according to the first layer forming step contains the first layer zeolite. The slurry for forming the first layer is obtained by mixing the first layer zeolite and the binder with water, and further, if necessary, a functional agent such as a deodorizing agent or a catalyst, a reinforcing agent, a dispersant, an antifoaming agent. It is prepared by mixing and dispersing the agent.

  Moreover, the slurry for 2nd layer formation which concerns on this 2nd layer formation process contains this 2nd layer zeolite. The slurry for forming the second layer is obtained by mixing the second layer zeolite and the binder with water, and further, if necessary, a functional agent such as a deodorizing agent or a catalyst, a reinforcing agent, a dispersing agent, an antifoaming agent. It is prepared by mixing and dispersing the agent. Examples of the binder relating to the first layer forming slurry and the second layer forming slurry include silica sol, alkali silicate, alumina sol, titania sol and the like.

  Then, the first layer forming steps (A) to (C) and the second layer forming steps (A) to (C) are performed by using the fibrous carrier as the first layer forming slurry or the second layer forming step. It is performed by dipping or coating with a slurry for coating and then drying. The method for performing the dipping treatment is not particularly limited, and for example, it is carried out by allowing the fibrous carrier to stand in a dipping tank containing the slurry. The method for performing the coating treatment is not particularly limited, and for example, the slurry is applied to the fibrous carrier using a roll coater, a spray, or the like. Moreover, this immersion process or this application | coating process can be repeated in multiple times. Moreover, you may perform baking at about 300-600 degreeC after this drying as needed.

  Next, a household dehumidifier in which the dehumidifying rotor of the present invention is used will be described with reference to FIGS. FIG. 4 is a diagram showing a configuration of members in a rotor case of a household dehumidifier, and FIG. 5 is a cross-sectional view showing arrangement positions of members in the rotor case of the household dehumidifier. 6 is a perspective view of the household dehumidifier, and FIG. 7 is a view of the household dehumidifier as viewed from the opening 3b side of the honeycomb rotor.

  As shown in FIG. 4, in the rotor case of a household dehumidifier, a dehumidifying rotor 1 in which a three-layer dehumidifying agent layer comprising the rotor shaft 12, the first layer, and the second layer is formed. It is comprised by the one supply machine 17, the 2nd supply machine 14, the heater 15, and the moisture absorption air exhaust duct 16, and the arrangement position in the rotor case of each structural member is as showing in FIG.

  6 and 7 includes a rotor case 22 in which the opening surfaces 3a and 3b of the dehumidification rotor 1 are configured with radial ribs 24, and the rotor case 22 installed in the rotor case 22. The dehumidification rotor 1, the first supply device 17, the second supply device 14, the heating device 15, the hygroscopic air exhaust duct 16, the dry air suction duct 21, and the drain pipe 26 are attached, and cooling fins are installed inside. And a motor for rotating the dehumidifying rotor 1 (not shown). The second feeder 14 and the heating device 15 are installed in the dry air suction duct 21.

  The hygroscopic air exhaust duct 16 is an exhaust duct for exhausting the hygroscopic air L to the outside of the rotor case 22 as shown in FIG. 5 and is supplied into the rotor case 22 by the first feeder 17. This is also a blocking wall for preventing the air to be treated M from flowing into the regeneration zone in the dehumidifying rotor 1.

  The household dehumidifier 20 is not provided with a dividing member that divides the opening surfaces 3a and 3b into a dehumidification zone and a regeneration zone, and is thus supplied by the first supply device 17 and the second supply device 14. A dehumidification zone and a regeneration zone are formed in the dehumidification rotor 1 by the flow of air. That is, a portion where the air to be treated M flows in the dehumidification rotor 1 is a dehumidification zone, and a portion where the drying air K flows is a regeneration zone. In addition, the surface of the opening surface 3a that receives the supply of the drying air K by the second supply device 14 is a regeneration zone, and the air to be treated to the dehumidification rotor 1 by the moisture absorption air exhaust duct 16 in the opening surface 3b. The area other than the surface where the supply of M is blocked is the dehumidifying zone.

  The household dehumidifier 20 is operated as follows. The household dehumidifier 20 is installed in a room where the air to be treated M exists. And the to-be-processed air M which exists in the periphery by this 1st supply machine 17 is supplied in this dehumidification rotor 1, and when this to-be-processed air M passes the inside of this dehumidification rotor 1, it contacts with a zeolite. As a result, moisture in the air to be treated M moves to the zeolite, so that the air to be treated M is dehumidified. The dehumidified air N from which moisture has been removed is discharged to the periphery from the aperture surface 3 a of the dehumidifying rotor 1.

  Next, the zeolite that has absorbed moisture in the dehumidifying zone moves to the regeneration zone as the dehumidifying rotor 1 rotates. Then, using the second supply device 14, the drying air K that has been heated and passed through the heater 15 is supplied to the dehumidifying rotor 1. When the drying air K comes into contact with the zeolite, moisture in the zeolite moves to the drying air K, so that the zeolite is dehumidified. The moisture absorption air L that has absorbed moisture is discharged from the moisture absorption air exhaust duct 16 to the outside of the dehumidification rotor 1, and the moisture absorption air L is brought into contact with the cooling fins in the condenser 25, whereby moisture is condensed. Moisture is removed from the moisture-absorbing air L, and the air P from which moisture has been removed is released to the periphery.

  Next, the zeolite dehumidified in the regeneration zone moves to the dehumidification zone when the dehumidification rotor 1 rotates, and is used again for dehumidification of the air to be treated M.

  The rotation of the dehumidifying rotor 1 may be continuous or intermittent. When the dehumidifying rotor 1 rotates continuously, the rotation speed is not particularly limited, but is approximately 10 to 120 rotations / hour, preferably 20 to 80 rotations / hour. When the dehumidifying rotor 1 rotates intermittently, the amount of rotation of the dehumidifying rotor 1 per rotation is 1/12 to 1/3 rotation, and the rotation interval may be either regular or irregular. . It is preferable to continuously rotate the dehumidification rotor 1 in that a certain amount of regenerated zeolite is always supplied to the dehumidification zone, so that the dehumidification efficiency is high and the dehumidification performance is stable.

  The air to be treated M and the drying air K are supplied from the same space, and the dehumidified air N and the air P from which the moisture has been removed are discharged into the same space.

  Regeneration of zeolite in the dehumidifying agent layer in the household dehumidifier will be described with reference to FIG. FIG. 8 is a schematic view showing a state in which the heat of the heater is transferred to the zeolite in the dehumidifying agent layer, and is a cross-sectional view. In FIG. 8, a dehumidifying agent layer 31 containing zeolite is formed on the fibrous carrier 32. The surface of the dehumidifying agent layer 31 on the supply side of the regeneration air 33 (hereinafter also simply referred to as the surface 37) is heated by the radiant heat 34 emitted from the heater 15 in the zeolite in the dehumidifying agent layer 31. The heat generated by the radiant heat 34 is transferred to the zeolite in the B portion by transferring the zeolite in the dehumidifying agent layer 31. Further, when the regenerated air 33 heated by the heater 15 passes through the dehumidifying agent layer 31 in the direction of the arrow 38, the heat in the regenerated air 33 is brought into contact with the B portion zeolite. Is transmitted to the zeolite of the B part. That is, the zeolite in part B is heated by the conduction heat 35 of the zeolite and the heat 36 from the regeneration air. The heated portion B zeolite dehumidifies the moisture that has been absorbed, and the regeneration air 33 receives the moisture, whereby the portion B zeolite is regenerated. Such a thing occurs in the whole area of the dehumidifying agent layer 31, and the dehumidifying agent layer 31 is regenerated.

  Then, the dehumidification of the zeolite in the dehumidifying agent layer 31 is performed when the regeneration air 33 passes from the surface 37 toward the inside of the dehumidifying agent layer 31 (in the direction indicated by the arrow 38). Since the water content of the zeolite evaporates and moves to the regeneration air 33 as water vapor, the zeolite in the dehumidifying agent layer 31 is deprived of the latent heat of vaporization and decreases in temperature during dehumidification. Therefore, the temperature of the zeolite in the dehumidifying agent layer 31 decreases as the distance from the surface 37 increases, that is, the distance from the surface 37 increases and the fiber carrier 32 approaches.

  In the household dehumidifier, the surface temperature of the dehumidification rotor is usually 300 to 800 ° C., so that the temperature of the surface 37 is extremely high, and the zeolite in the vicinity of the surface 37 is exposed to an extremely high temperature. Therefore, a zeolite having a small reduction rate of the specific surface area in the hydrothermal resistance test has been used for the conventional dehumidifying rotor. However, since the zeolite used in the conventional dehumidification rotor has a high dehumidification peak temperature, if the surface temperature of the dehumidification rotor is lowered by reducing power consumption, the amount of zeolite that is not sufficiently regenerated increases, Both initial performance and long-term performance decreased.

  The relationship between the temperature of the zeolite in the dehumidifying agent layer and the dehumidifying amount will be described with reference to FIGS. FIG. 9 is a diagram showing the relationship between the temperature of the zeolite in the dehumidifying agent layer formed in the dehumidifying rotor of the present invention and the dehumidifying amount. 9, (9-1) is a graph in which the temperature of the zeolite is plotted on the vertical axis and the distance from the surface 37 is plotted on the horizontal axis, and the dehumidifying agent layer 31 is present in the regeneration zone. (9-2) is an enlarged view of a part of a cross section of the dehumidifying agent layer 31 composed of the first layer and the second layer. (9-3) is a graph in which the integrated value of the dehumidification amount of zeolite is plotted on the vertical axis and the distance from the surface 37 is plotted on the horizontal axis, and is a graph when the dehumidifying agent layer 31 is present in the dehumidifying zone. In (9-1), symbol F indicates the temperature required for the zeolite contained in the second layer 41 to be completely dehumidified, and symbol G indicates the zeolite contained in the first layer 42. Indicates the temperature required for the complete dehumidification, E indicates the temperature of the boundary between the second layer 41 and the first layer 42, and in (9-2), reference numeral 38 indicates the regeneration air. Reference numeral 33 denotes a direction passing through the dehumidifying agent layer 31. FIG. 12 is a diagram showing the relationship between the temperature of the zeolite in the dehumidifying agent layer formed in the conventional dehumidifying rotor, that is, the dehumidifying agent layer containing one type of zeolite, and the dehumidifying amount. In FIG. 12, (12-1) is a graph in which the temperature of the zeolite is plotted on the vertical axis and the distance from the surface 37 is plotted on the horizontal axis, and the dehumidifying agent layer 31 is present in the regeneration zone. (12-2) is an enlarged view of a part of the cross section of the dehumidifying agent layer 31 containing a single zeolite. (12-3) is a graph in which the integrated value of the dehumidifying amount of zeolite is plotted on the vertical axis and the distance from the surface 37 is plotted on the horizontal axis, and is a graph when the dehumidifying agent layer 31 is present in the dehumidifying zone. In (12-1), symbol K indicates a temperature required for the zeolite contained in the dehumidifying agent layer 31 to be completely dehumidified, and in (12-2), symbol 38 indicates regeneration. The direction in which the air 33 passes through the dehumidifying agent layer 31 is shown.

  In the case of the conventional dehumidifying rotor, as shown in FIG. 12, the temperature of the zeolite in the dehumidifying agent layer 31 becomes lower as it goes inside the dehumidifying agent layer 31, i.e., away from the surface 37. However, if the temperature of the surface 37 is the position of H in the graph of (12-1), the temperature of the zeolite in the vicinity of the fibrous carrier 32 is such that the zeolite in the dehumidifying agent layer 31 is completely dehumidified. Therefore, all of the zeolite in the dehumidifying agent layer 31 is regenerated. Therefore, when moving to the dehumidifying zone, all the zeolite in the dehumidifying agent layer 31 exerts the dehumidifying function. Therefore, as indicated by 55 in the graph of (12-3), the integrated value of the dehumidifying amount is It increases over the entire range of the dehumidifying agent layer 31. However, when the temperature of the surface 37 falls to the position J in the graph of (12-1), the dehumidifying agent layer 31 has a temperature lower than the temperature K required for complete dehumidification of the zeolite. Portion 56 results. For this reason, the zeolite in the portion 56 that falls below the temperature K required for the zeolite to be completely dehumidified is not regenerated, so even if it moves to the dehumidification zone, it does not absorb moisture in the air to be treated. . Therefore, as indicated by 57 in the graph of (12-3), the integrated value of the dehumidification amount becomes low. For this reason, in the conventional dehumidifying rotor, when the heater temperature is lowered, the dehumidifying amount is reduced.

  On the other hand, in the case of the dehumidifying rotor of the present invention, as shown in FIG. 9, the temperature of the zeolite in the dehumidifying agent layer 31 becomes lower as the inside of the dehumidifying agent layer 31 becomes lower. Is the position of C in the graph of (9-1), the temperature of the zeolite in the second layer 41 is the temperature required for the zeolite in the second layer 41 to be completely dehumidified. Since the temperature of the zeolite in the first layer 42 is equal to or higher than the temperature G necessary for complete dehumidification of the zeolite in the first layer 42, All of the zeolite is regenerated. Therefore, when moving to the dehumidifying zone, all the zeolite in the dehumidifying agent layer 31 exerts the dehumidifying function, and therefore, as shown by 46 in the graph of (9-3), the integrated value of the dehumidifying amount is It increases over the entire range of the dehumidifying agent layer 31. Further, even if the temperature of the surface 37 falls to the position D in the graph of (9-1), the temperature of the zeolite in the second layer 41 is completely desorbed from the zeolite in the second layer 41. The temperature F required for being wetted is equal to or higher than the temperature F, and the temperature of the zeolite in the first layer 42 is equal to or higher than the temperature G required for the zeolite in the first layer 42 to be completely dehumidified. Therefore, all the zeolite in the dehumidifying agent layer 31 exhibits the dehumidifying function. Therefore, even when the temperature of the surface 37 is lowered to the position D, the graph of (9-3) is the same as the graph before the temperature of the surface 37 is lowered (when it is at the C position). For this reason, the dehumidification rotor of the present invention does not easily decrease the dehumidification amount even if the heater temperature is lowered.

  In the case of the dehumidifying rotor of the present invention, the rate of decrease in the specific surface area in the hydrothermal resistance test of the zeolite in the first layer 42 is high, but the temperature at which the zeolite in the first layer 42 is exposed is (9− Since the temperature is equal to or lower than the position E in the graph of 1), the zeolite in the first layer 42 is hardly deteriorated. That is, the presence of the second layer 41 on the first layer 42 prevents the first layer 42 from being exposed to a high temperature.

  EXAMPLES Next, although an Example is given and this invention is demonstrated more concretely, this is only an illustration and does not restrict | limit this invention.

Example 1
(Fabrication of honeycomb structure fiber carrier)
The biosoluble fiber was made with an organic fiber and an organic binder to obtain a sheet-like fibrous carrier. The sheet-like fibrous carrier was processed into a corrugated shape having a pitch of 2.7 mm and a peak height of 1.5 mm to obtain a corrugated fibrous carrier. The sheet-like fibrous carrier and the corrugated fibrous carrier were overlapped and wound into a donut shape to obtain a fibrous carrier having a honeycomb structure with an outer diameter of 250 mm, an inner diameter of 20 mm, and a thickness of 20 mm.

(Preparation of first layer zeolite)
Synthetic sodium Y-type zeolite A (original zeolite whose skeletal structure is Y-type, the counter ion of the aluminum part is sodium ion, and is not subjected to ion exchange treatment. The reduction rate of the specific surface area in the hydrothermal resistance test is 3 %, The dehumidifying peak temperature is 138 ° C.) was immersed in a 10% aqueous ammonium chloride solution at room temperature for 2 hours. Next, the Y-type zeolite was filtered off, dried at 110 ° C. for 1 hour, and further calcined at 500 ° C. for 1 hour. The steps from the immersion in the aqueous ammonium chloride solution to the calcination at 500 ° C. were further performed twice to obtain hydrogen ion-exchanged Y-type zeolite B subjected to hydrogen ion exchange.

  Next, the hydrogen ion-exchanged Y-type zeolite B was immersed in an aqueous solution containing 30 mol / L lanthanum ions and 30 mol / L cerium ions at 25 ° C. for 2 hours. Next, the Y-type zeolite was filtered and washed with water, and dried at 200 ° C. for 2 hours to obtain a rare earth ion-exchanged Y-type zeolite C ion-exchanged with rare earth ions. In the hydrothermal resistance test of the rare earth ion-exchanged Y-type zeolite C, the reduction rate of the specific surface area was 25%, and the dehumidification peak temperature was 130 ° C.

(Supporting zeolite)
In the water, the rare earth ion-exchanged Y-type zeolite C and colloidal silica obtained as described above have a content of the rare earth ion-exchanged Y-type zeolite C of 24% by mass and a solid content of the colloidal silica of 6% by mass. % To prepare a slurry for forming the first layer, and the fibrous carrier having the honeycomb structure was immersed in the slurry for forming the first layer. Thereafter, the fibrous carrier having the honeycomb structure was taken out from the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a first layer-forming fibrous carrier.

  Next, the synthetic sodium Y-type zeolite A and colloidal silica are mixed with water so that the content of the synthetic sodium Y-type zeolite A is 24% by mass and the solid content of the colloidal silica is 6% by mass. Then, a slurry for forming the second layer was prepared, and the first layer-forming fibrous carrier was immersed in the slurry for forming the second layer. Thereafter, the first layer-forming fibrous carrier was taken out of the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a dehumidification rotor. In the obtained dehumidifying rotor, the supported amount of the rare earth ion-exchanged Y-type zeolite C (first layer zeolite) was 40 g, and the supported amount of the synthetic sodium Y-type zeolite A (second layer zeolite) was 80 g.

(Dehumidification durability test)
The dehumidification rotor is installed in the household dehumidifier 20 shown in FIG. 6, and the household dehumidifier is installed in a constant temperature and humidity chamber controlled at 25 ° C. and 50% RH, and dehumidified under the following operating conditions. Drove. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.
(Test conditions)
The temperature measured by the thermocouple when the thermocouple was brought into contact with the opening surface of the honeycomb rotor on the inlet side of the regeneration air; 500 ° C.
The temperature measured by the thermocouple when the thermocouple is brought into contact with the opening of the honeycomb rotor on the outlet side of the regeneration air; 60 ° C.
・ Rotation speed of dehumidification rotor 1; 0.5 rotations / minute

(Comparative Example 1)
(Fabrication of honeycomb structure fiber carrier)
In the same manner as in Example 1, a fibrous carrier having a honeycomb structure was obtained.
(Supporting zeolite)
In water, the rare earth ion-exchanged Y-type zeolite C and colloidal silica used in Example 1 had a content of the rare earth ion-exchanged Y-type zeolite C of 24% by mass and a solid content of colloidal silica of 6% by mass. The slurry for supporting was prepared, and the fibrous carrier having the honeycomb structure was immersed in the supporting slurry. Thereafter, the fibrous carrier having the honeycomb structure was taken out of the slurry and dried at 150 ° C. for 3 hours. Subsequently, the operation from the immersion to drying was performed again to obtain a dehumidifying rotor. In the obtained dehumidifying rotor, the supported amount of the rare earth ion-exchanged Y-type zeolite C was 120 g.

(Dehumidification durability test)
The same procedure as in Example 1 was performed except that the dehumidification rotor installed in the household dehumidifier 20 was the dehumidification rotor obtained as described above. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.

(Comparative Example 2)
(Fabrication of honeycomb structure fiber carrier)
In the same manner as in Example 1, a fibrous carrier having a honeycomb structure was obtained.
(Supporting zeolite)
Synthetic sodium Y-type zeolite A and colloidal silica used in Example 1 in water so that the content of synthetic sodium Y-type zeolite A is 24 mass% and the solid content of colloidal silica is 6 mass%. By mixing, a slurry for supporting was prepared, and the fibrous carrier having the honeycomb structure was immersed in the slurry for supporting. Thereafter, the fibrous carrier having the honeycomb structure was taken out of the slurry and dried at 150 ° C. for 3 hours. Subsequently, the operation from the immersion to drying was performed again to obtain a dehumidifying rotor. In the obtained dehumidifying rotor, the supported amount of the synthetic sodium Y-type zeolite A was 120 g.

(Dehumidification durability test)
The same procedure as in Example 1 was performed except that the dehumidification rotor installed in the household dehumidifier 20 was a dehumidification rotor obtained as described above. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.

(Example 2)
(Fabrication of honeycomb structure fiber carrier)
In the same manner as in Example 1, a fibrous carrier having a honeycomb structure was obtained.
(Preparation of first layer zeolite)
A rare earth ion exchange Y-type zeolite C was obtained in the same manner as in Example 1.

(Supporting zeolite)
The rare earth ion-exchanged Y-type zeolite C and colloidal silica are mixed with water so that the content of the rare-earth ion-exchanged Y-type zeolite C is 36% by mass and the solid content of the colloidal silica is 9% by mass. A slurry for forming the first layer was prepared, and the fibrous carrier having the honeycomb structure was immersed in the slurry for forming the first layer. Thereafter, the fibrous carrier having the honeycomb structure was taken out from the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a first layer-forming fibrous carrier.

  Next, the synthetic sodium Y-type zeolite A and colloidal silica are mixed with water so that the content of the synthetic sodium Y-type zeolite A is 20% by mass and the solid content of the colloidal silica is 5% by mass. Then, a slurry for forming the second layer was prepared, and the first layer-forming fibrous carrier was immersed in the slurry for forming the second layer. Thereafter, the first layer-forming fibrous carrier was taken out of the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a dehumidification rotor. In the obtained dehumidifying rotor, the supported amount of the rare earth ion-exchanged Y-type zeolite C (first layer zeolite) was 80 g, and the supported amount of the synthetic sodium Y-type zeolite A (second layer zeolite) was 40 g.

(Dehumidification durability test)
The same procedure as in Example 1 was performed except that the dehumidification rotor installed in the household dehumidifier 20 was a dehumidification rotor obtained as described above. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.

(Example 3)
(Fabrication of honeycomb structure fiber carrier)
In the same manner as in Example 1, a fibrous carrier having a honeycomb structure was obtained.
(Preparation of first layer zeolite)
Synthetic sodium Y-type zeolite D (skeleton structure is Y-type, the counter ion of the aluminum part is sodium ion, and is an original zeolite not subjected to ion exchange treatment) in 10% ammonium chloride aqueous solution, It was immersed for 2 hours at room temperature. Next, the Y-type zeolite was filtered off, dried at 110 ° C. for 1 hour, and further calcined at 500 ° C. for 1 hour. The steps from immersion in this ammonium chloride aqueous solution to calcination at 500 ° C. were further performed twice to obtain hydrogen ion-exchanged Y-type zeolite E subjected to hydrogen ion exchange. The reduction rate of the specific surface area of the hydrogen ion exchange Y-type zeolite E in the hydrothermal resistance test was 15%, and the dehumidification peak temperature was 94 ° C.

(Supporting zeolite)
The hydrogen ion-exchanged Y-type zeolite E and colloidal silica are mixed with water so that the content of the hydrogen-ion-exchanged Y-type zeolite E is 21% by mass and the solid content of the colloidal silica is 6% by mass. A slurry for forming the first layer was prepared, and the fibrous carrier having the honeycomb structure was immersed in the slurry for forming the first layer. Thereafter, the fibrous carrier having the honeycomb structure was taken out from the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a first layer-forming fibrous carrier.

  Next, the synthetic sodium Y-type zeolite A and colloidal silica used in Example 1 were mixed in water with a content of the synthetic sodium Y-type zeolite A of 24% by mass and a solid content of the colloidal silica of 6% by mass. The slurry for 2nd layer formation was prepared so that it might become, and this 1st layer formation fibrous carrier was immersed in this slurry for 2nd layer formation. Thereafter, the first layer-forming fibrous carrier was taken out of the slurry, dried at 150 ° C. for 3 hours, and then fired at 500 ° C. for 1 hour to obtain a dehumidification rotor. In the obtained dehumidification rotor, the supported amount of the hydrogen ion exchange Y-type zeolite E (first layer zeolite) was 50 g, and the supported amount of the synthetic sodium Y-type zeolite A (second layer zeolite) was 100 g.

(Dehumidification durability test)
The same procedure as in Example 1 was performed except that the dehumidification rotor installed in the household dehumidifier 20 was a dehumidification rotor obtained as described above. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.

(Comparative Example 3)
(Fabrication of honeycomb structure fiber carrier)
In the same manner as in Example 1, a fibrous carrier having a honeycomb structure was obtained.

(Supporting zeolite)
In water, the hydrogen ion-exchanged Y-type zeolite E and colloidal silica used in Example 3 were such that the content of the hydrogen-ion-exchanged Y-type zeolite E was 21% by mass and the solid content of the colloidal silica was 6% by mass. The slurry for supporting was prepared, and the fibrous carrier having the honeycomb structure was immersed in the supporting slurry. Thereafter, the fibrous carrier having the honeycomb structure was taken out of the slurry and dried at 150 ° C. for 3 hours. Subsequently, the operation from the immersion to drying was performed again to obtain a dehumidifying rotor. In the obtained dehumidifying rotor, the supported amount of the hydrogen ion exchange Y-type zeolite E was 140 g.

(Dehumidification durability test)
The same procedure as in Example 1 was performed except that the dehumidification rotor installed in the household dehumidifier 20 was a dehumidification rotor obtained as described above. FIG. 10 shows the change over time in the dehumidification amount, and FIG. 11 shows the change over time in the specific surface area of the dehumidification rotor.

  ADVANTAGE OF THE INVENTION According to this invention, the household dehumidifier which exhibits sufficient dehumidification performance even if heater temperature is low can be manufactured.

It is a schematic diagram which shows the dehumidification rotor of the embodiment of this invention. It is an enlarged view of A part of the opening surface of the dehumidification rotor in FIG. It is an enlarged view of the cross section of the dehumidification rotor in FIG. It is a figure which shows the structure of the member in the rotor case of a household dehumidifier. It is sectional drawing which shows the arrangement position of the member in the rotor case of a domestic dehumidifier. It is a perspective view of a household dehumidifier. It is the figure which looked at the household dehumidifier from the opening surface 3b side of the honeycomb rotor. It is a schematic diagram which shows a mode that the heat of a heater is transmitted to the zeolite in a dehumidifier layer. It is a figure which shows the relationship between the temperature of the zeolite in the dehumidification agent layer currently formed in the dehumidification rotor of this invention, and dehumidification amount. It is a graph which shows a time-dependent change of the dehumidification amount of a dehumidification rotor. It is a graph which shows a time-dependent change of the specific surface area of a dehumidification rotor. It is a figure which shows the relationship between the temperature of the zeolite in the dehumidifier layer currently formed in the conventional dehumidification rotor, and dehumidification amount.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dehumidification rotor 2 Center hole 3a, 3b Opening surface 4 Ventilation cavity 5 Flat part 6 Corrugated part 7, 32 Fiber carrier 8, 42 First layer 9, 41 Second layer 10, 31 Dehumidifier layer 12 Rotor shaft 14 First Two supply machines 15 Heater 16 Hygroscopic air exhaust duct 17 First supply machine 20 Household dehumidifier 21 Dry air intake duct 22 Rotor case 24 Radial rib 25 Condenser 26 Drain pipe 33 Regeneration air 34 Radiation heat 35 Conduction heat 36 of zeolite Regeneration Heat from the air 37 Regenerative air supply side 38 Regenerative air passage direction

Claims (10)

A dehumidification rotor in which two or more types of zeolite are supported on the fibrous carrier of the dehumidification rotor, and the ion exchange of the counter ion at the aluminum site in the original zeolite is performed with hydrogen ions, Hydrogen ion exchange zeolite obtained by performing a hydrogen ion exchange process for obtaining zeolite, or a hydrogen ion exchange process for obtaining a hydrogen ion exchange zeolite by ion exchange of a counter ion at an aluminum site in the original zeolite with hydrogen ions, and the hydrogen ion exchange zeolite Second metal ion exchanged zeolite obtained by performing a second metal ion exchange step in which a hydrogen ion in the original zeolite is ion exchanged with a second metal ion other than the counter ion of the aluminum part of the original zeolite to obtain a second metal ion exchanged zeolite And a second layer containing the original zeolite and sandwiching the first layer Dehumidifying agent layer of three-layer structure is formed consisting of, raw zeolite is sodium zeolite, and, dehumidification rotor, characterized in that said second metal ion is a non-sodium ions. A dehumidifying rotor in which two or more types of zeolite are supported on a fibrous carrier of a dehumidifying rotor, wherein the fibrous carrier contains a zeolite having a specific surface area reduction rate of 15 to 50% in a hydrothermal resistance test. A dehumidifying agent layer having a three-layer structure is formed, which includes a zeolite having a specific surface area reduction rate of 0 to 10% in a hydrothermal resistance test, and a second layer sandwiching the first layer. difference dehumidification peak temperature of the zeolite to be dehumidified peak temperature and said greater-containing zeolite contained in the two layers Ri 1 to 60 ° C. der, zeolite sodium zeolite contained in the second layer , and the and dehumidification rotor and said zeolite der Rukoto zeolite contained in said first layer is ion-exchanged with non-sodium ions. The dehumidification rotor according to claim 1, wherein the sodium zeolite is Y-type sodium zeolite. The dehumidification rotor according to any one of claims 1 to 3, wherein the non-sodium ion is a rare earth ion, a zinc ion, or a tin ion. The dehumidification rotor according to any one of claims 1 to 4 , wherein the fibrous carrier is a fibrous carrier obtained by molding a biosoluble fiber. A sheet-like fibrous carrier is molded and processed to obtain a rotor-shaped fibrous carrier, and the rotor-shaped fibrous carrier is immersed in a first layer forming slurry containing a first layer zeolite. Alternatively, the first layer forming step of obtaining a rotor-shaped fibrous carrier on which the first layer is formed by coating treatment, and the rotor-shaped fibrous carrier on which the first layer is formed, the second-layer zeolite The slurry for forming the second layer contains a second layer forming step for obtaining a dehumidification rotor by dipping or coating, and the first layer zeolite has hydrogen ions as counter ions at the aluminum sites in the original zeolite. Ion exchange to obtain a hydrogen ion exchange zeolite Hydrogen ion exchange zeolite obtained by performing a hydrogen ion exchange process, or counter ion of the aluminum part in the original zeolite is ion exchanged with hydrogen ions Hydrogen ion exchange step for obtaining hydrogen ion exchanged zeolite, and ion exchange of hydrogen ions in the hydrogen ion exchanged zeolite with a second metal ion other than the counter ion of the aluminum part of the original zeolite to obtain a second metal ion exchanged zeolite a second metal ion-exchange zeolite obtained performed a second metal ion-exchange step, the second layer zeolite, raw zeolite der is, the raw zeolite is sodium zeolite, and, said second metal ion is non method of manufacturing a dehumidifying rotor and said sodium ion der Rukoto. First layer formation to obtain a sheet-like fibrous carrier on which a first layer is formed by immersing or coating a sheet-like fibrous carrier with a slurry for forming a first layer containing a first-layer zeolite Forming a sheet-like fibrous carrier on which the first layer is formed, forming a rotor-shaped fibrous carrier on which the first layer is formed, and forming the first layer A second layer forming step for obtaining a dehumidification rotor by subjecting the rotor-shaped fibrous carrier to a second layer forming slurry containing a second layer zeolite and dipping or coating the slurry. Hydrogen ion-exchanged zeolite obtained by performing a hydrogen ion exchange step in which a zeolite is ion-exchanged with a counter ion at an aluminum site in the original zeolite to obtain a hydrogen ion-exchanged zeolite, or an aluminum part in the original zeolite A hydrogen ion exchange step of obtaining a hydrogen ion exchanged zeolite by ion exchange of the counter ion of hydrogen ion, and ionizing the hydrogen ion in the hydrogen ion exchanged zeolite with a second metal ion other than the counter ion of the aluminum part of the original zeolite exchange to a second metal ion-exchange zeolite obtained performed a second metal ion-exchange step to obtain a second metal ion-exchange zeolite, the second layer zeolite, raw zeolite der is, raw zeolite sodium zeolite , and the and method of the dehumidifying rotor said second metal ion and wherein the non-sodium ion der Rukoto. First layer formation to obtain a sheet-like fibrous carrier on which a first layer is formed by immersing or coating a sheet-like fibrous carrier with a slurry for forming a first layer containing a first-layer zeolite Step, a sheet-like fibrous carrier on which the first layer is formed is dipped or coated with a slurry for forming a second layer containing a second layer zeolite, whereby a first layer and a second layer are formed. A second layer forming step for obtaining a sheet-like fibrous carrier, and a sheet-like fibrous carrier on which the first layer and the second layer are formed into a rotor shape to obtain a dehumidifying rotor A hydrogen ion exchange zeolite obtained by performing a hydrogen ion exchange step, wherein the first layer zeolite has a forming process step, and the ion exchange of the counter ion of the aluminum part in the original zeolite with the hydrogen ion is carried out to obtain a hydrogen ion exchange zeolite, Or original A hydrogen ion exchange step for obtaining a hydrogen ion exchanged zeolite by ion exchange of a counter ion at an aluminum site in oleite with a hydrogen ion, and a hydrogen ion in the hydrogen ion exchanged zeolite other than the counter ion at the aluminum site of the original zeolite by ion-exchange in two metal ion, a second metal ion-exchange zeolite obtained performed a second metal ion-exchange step to obtain a second metal ion-exchange zeolite, the second layer zeolite, Ri original zeolite der, the original zeolite is sodium zeolite, and manufacturing method of the dehumidifying rotor said second metal ion and wherein the non-sodium ion der Rukoto. The method for manufacturing a dehumidifying rotor according to any one of claims 6 to 8, wherein the sodium zeolite is Y-type sodium zeolite. The method of manufacturing a dehumidifying rotor according to any one of claims 6 to 8, wherein the non-sodium ion is a rare earth ion, a zinc ion, or a tin ion.

Images