JP2000218127A - Dry adsorption device and its adsorbent - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce energy required for rotor regeneration while suppressing an increase in size and an increase in product cost. A duct (11) is driven by driving an intake / exhaust fan (13).
Air flows into the adsorption zone 4 of the rotating dehumidifying rotor (adsorbent) 1 through the air, and flows through the ventilation holes 2 of the dehumidifying rotor 1 to adsorb moisture to the desiccant, and then to dry air A2 is discharged from the duct 12. Further, the suction / exhaust fan 17 is driven to heat the regeneration air A3 flowing through the duct 14 by the heater 15 to produce high-temperature regeneration air A4, which flows into the desorption zone 5 of the dehumidification rotor 1, and The water that has been adsorbed by the desiccant is desorbed by flowing the air holes 2, and the humidified air A5 is discharged from the duct 16. In such a continuous-rotation type dry adsorption device, the dehumidifying rotor (adsorbent) 1 has a ventilation hole 2 inclined in the thickness direction of the rotor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorbent for a dry adsorber, and more particularly, to an adsorbent having a honeycomb structure and having a vent formed from one side to the other side.
In particular, the present invention relates to an adsorbent for adsorbing moisture from a gas to be treated and a dry adsorption apparatus equipped with the adsorbent.

[0002]

2. Description of the Related Art FIG. 7 is a schematic diagram of a continuous rotation type dry adsorption apparatus for humidity control according to the prior art.
FIG. 8A is a perspective view of the dehumidifying rotor, and FIG. 8B is a sectional view of the dehumidifying rotor. The disc-shaped adsorbent 1 supporting the desiccant has a honeycomb structure in which the ventilation holes 2 are formed in parallel with the thickness direction, and is rotatable around a central axis 3 parallel to the thickness direction. It is configured as a dehumidifying rotor 1. The “adsorbent” and the “dehumidifying rotor” have the same substance, and are denoted by a common reference numeral 1. The dehumidifying rotor 1 is driven and rotated by a motor (not shown) connected to the central shaft 3.

The air to be treated A1 sucked through the introduction duct 11 flows into the adsorption zone 4 of the dehumidifying rotor (adsorbing material) 1, and the moisture is adsorbed by the desiccant while flowing through the ventilation holes 2 of the dehumidifying rotor 1. Then, dehumidification is performed. The dried air A2 that has released the moisture is supplied to a required area by the intake / exhaust fan 13 through the exhaust duct 12. Further, the regeneration air A3 sucked through the introduction duct 14 is heated while passing through the heater 15, and the high-temperature regeneration air A3 is heated.
Numeral 4 flows into the desorption zone 5 of the dehumidifying rotor 1 and removes moisture from the desiccant while flowing through the ventilation holes 2 of the dehumidifying rotor 1 to regenerate the dehumidifying rotor (adsorbent) 1. The humidified air A5 containing water is supplied to a required area by the intake / exhaust fan 17 through the exhaust duct 16, or is exhausted. When the humidified air A5 is returned to the room, the amount of water increases, and a humidifying effect is obtained. If the humidified air A5 is discharged outside the room and only the dry air A2 is sent into the room, a dehumidifying effect can be obtained.

[0004]

However, the above-mentioned prior art has the following problems in improving the water adsorption capacity.
Although the moisture adsorption capacity of the dehumidifying rotor 1 depends on the flow path length of the ventilation hole 2, in the case of the related art, the direction of the ventilation hole 2 is parallel to the thickness direction of the dehumidifying rotor (adsorbent) 1. Therefore, the thickness of the dehumidifying rotor 1 had to be increased in order to increase the water adsorption capacity, and the increase in size was inevitable.
In addition, when the thickness of the dehumidifying rotor 1 is increased, it is necessary to increase the output of the heater 15 at the time of regeneration for removing the adsorbed moisture. However, the heater 15 is set so that the outlet temperature of the dehumidifying rotor 1 is set to a temperature necessary for regeneration of the adsorbent.
, The inlet temperature of the dehumidifying rotor 1 becomes unnecessarily high, the energy loss increases, and the running cost (regeneration power cost) increases. In addition, since the temperature is hardly lowered in the adsorption operation, the adsorption characteristics are adversely affected.

As measures for reducing power consumption and increasing reproduction efficiency, Japanese Patent Application Laid-Open No. 5-168840 discloses that
There is disclosed a technique in which a honeycomb structure (adsorbent) is divided into at least three in the ventilation direction and a heater is individually embedded between adjacent adsorbents. Japanese Patent Application Laid-Open No. 7-308537 discloses a technique. A technique is disclosed in which a copper heat transfer member in which a plurality of heat transfer legs are integrated into a heat transfer plate in a comb shape is embedded in an adsorbent. These are intended to suppress energy loss during regeneration by direct heating of the adsorbent.

However, according to the technique disclosed in the former publication, since the heater is individually provided, not only the product cost is greatly increased, but also the adsorbent is made into a rotor due to structural restrictions, and a continuous rotary dry adsorber is used. It is difficult to apply the method itself, and it is not a realistic method.

[0007] In the technique disclosed in the latter publication, since the comb-shaped heat transfer member is embedded, the adsorbing surface area of the adsorbent decreases, and the adsorbing ability decreases. To provide the required adsorption capacity, the diameter of the dehumidifying rotor must be increased. However, doing so results in not only an increase in product cost but also an increase in power consumption. In addition, the heat capacity of the entire dehumidifying rotor (adsorbent) is increased and cooling becomes difficult, resulting in a bad influence on the adsorption efficiency. This is because the lower the temperature of the dehumidifying rotor (adsorbent), the more water can be adsorbed.

The present invention has been made in order to solve the above-mentioned problems, and aims to reduce the energy required for the regeneration of the rotor while suppressing an increase in size and an increase in product cost. The purpose is.

[0009]

The adsorbent having a honeycomb structure in the dry adsorption apparatus according to the first aspect of the present invention has the following structure. That is, in forming a through hole from one side surface to the other side surface which is in a front-to-back relationship, the air hole is formed in a state inclined with respect to the thickness direction of the adsorbent. According to this configuration, the air holes for flowing the gas to be treated such as air and adsorbing the target substance such as moisture contained therein are inclined with respect to the thickness direction of the adsorbent, so that the required adsorption is achieved. In order to secure the flow path length of the ventilation hole required for the function, the required thickness of the adsorbent may be reduced as compared with the related art in which the ventilation hole is parallel to the thickness direction. Also,
By reducing the thickness of the adsorbent, the heat capacity of the adsorbent is reduced. Structurally, a simple and simple structure improvement in which ventilation holes are formed parallel to the thickness direction of the adsorbent in the prior art, but ventilation holes are formed in an inclined direction is sufficient.

[0010] The adsorbent in the dry adsorption device according to the second aspect is the adsorbent according to the first aspect, in which a honeycomb structure is loaded with a moisture absorbent to adsorb moisture. The carrier may be attached or impregnated. According to this configuration, it is suitable for humidity control in indoor air conditioning (air conditioning).

A third aspect of the present invention relates to a dry adsorption apparatus, wherein the adsorbent according to the first or second aspect is constituted by a rotor rotatable about a central axis parallel to a thickness direction thereof. The rotor is configured as a continuous rotation type dry adsorption apparatus that alternately repeats adsorption and desorption regeneration by using a fixed angular range in the circumferential direction of the rotor as an adsorption zone and the remaining range as a desorption zone. Since the heat capacity of the adsorbent is reduced, the amount of heat required for dissociating or desorbing the adsorbed components in the desorption zone due to the rotation of the rotor is reduced. Further, the heat conduction efficiency to the adsorbent is improved, and the heating efficiency due to radiant heat from a heating means such as a heater is improved. As described above, structurally, it is only necessary to simply and simply improve the structure by changing the ventilation holes from the direction parallel to the thickness direction of the adsorbent material to the inclination direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a dry adsorption apparatus and its adsorbent according to the present invention will be described below in detail with reference to the drawings. In the following embodiment, a continuous rotation type dry adsorption device for humidity control will be described as an example. FIG. 1 is a schematic configuration diagram of a continuous-rotation type dry adsorption device, FIG. 2A is a perspective view of a dehumidification rotor or an adsorbent in the dry adsorption device, and FIG. 2B is a cross-sectional view of the dehumidification rotor.

In a dehumidifying rotor (adsorbing material) 1 having a disc-shaped honeycomb structure while supporting a dry-type moisture absorbing agent, a large number of ventilation holes 2 are formed from a first plane 1a to a second plane 1b. However, unlike the prior art, the dehumidifying rotor 1 of the present embodiment has its ventilation holes 2 inclined with respect to the thickness direction of the rotor. Details of the aspect of the inclination of the ventilation hole 2 will be described later. In addition, the substance called “adsorbent” and the substance called “dehumidifying rotor” are the same entity,
Is attached.

The dehumidifying rotor 1 is fixed to a center shaft 3 as a rotation axis, and the center shaft 3 is connected to a motor (not shown). The dehumidifying rotor 1 is continuously rotated in one direction by the motor, but a fixed area larger than 180 degrees in the rotation range over 360 degrees is the adsorption zone 4 and the remaining area is Is the desorption zone 5. An adsorption system introduction duct 11 communicating with the adsorption zone 4 of the dehumidifying rotor 1 on its first plane 1a is provided, and an adsorption system communicating with the adsorption zone 4 on its second plane 1b. An exhaust duct 12 is provided.
The suction / exhaust fan 13 of the adsorption system is provided at an appropriate position.
In addition, the desorption zone 5 of the dehumidifying rotor 1
A desorption introduction duct 14 communicating with the flat surface 1b is provided, and a heater 15 as a heating means is disposed in the introduction duct 14 so as to face the dehumidifying rotor 1. A detachable exhaust duct 16 communicating with the plane 1 a is provided, and a detachable intake / exhaust fan 17 is provided at an appropriate position of the exhaust duct 16.

The adsorbent 1 constituting the dehumidifying rotor 1 is shown in FIG.
It is manufactured by winding the corrugated paper 20 as shown in FIGS. First, corrugated paper 20
Is cut into a rectangle. In this cutting, the corrugated paper 20 is cut into strips with the ridge line direction b of the peaks and valleys having a required angle θ with respect to the direction of the short side. For example, 30 ° is set as the angle θ in the ridgeline direction b. The strip-shaped corrugated paper 20 is wound in a cylindrical shape around a winding axis c parallel to the direction of the short side, and the adsorbent 1 having a honeycomb structure is manufactured. The shape of the honeycomb structure made using the corrugated paper 20 is shown in FIG.
(A).

In the disk-shaped dehumidifying rotor 1 made of the adsorbent 1, as shown in FIG. 2, the direction of the ventilation hole 2 is inclined at an angle θ with respect to the thickness direction of the rotor. The flow path length of the ventilation hole 2 from the first plane 1a to the second plane 1b is L, and the thickness of the dehumidifying rotor 1 is D.
Then, D = Lcos θ or L = D / cos θ. The difference Δ between the required flow path length L and the rotor thickness D is Δ =
L−D = L−L cos θ = (1−cos θ) L. θ = 3
At 0 °, Δ ≒ 0.13 L, and the rotor thickness can be reduced by about 13% as compared with the conventional case shown in FIG. Since the heat capacity of the thinned dehumidifying rotor 1 is reduced, it is possible to reduce the output of the heater 15 required to raise the temperature of the dehumidifying rotor 1 to a predetermined temperature in order to exhibit required desorption performance. it can. In addition, as the heat capacity decreases, the efficiency of cooling the area of the adsorbent 1 heated for regeneration in the desorption zone 5 in the process of returning to the adsorption zone 4 increases, so that the adsorption efficiency improves.

The angle θ of the ventilation hole 2 with respect to the thickness direction of the rotor can be set arbitrarily. For example, θ = 45
When set to °, the difference Δ between the required flow path length L and the rotor thickness D is Δ ≒ 0.29L, and the rotor thickness can be reduced by about 29% compared to the conventional case. .
Alternatively, when θ = 60 °, Δ ≒ 0.5
It becomes 0L, and can be reduced by 50%.

Next, another method for producing the adsorbent 1 with the ventilation hole 2 inclined with respect to the thickness direction of the rotor will be described. As shown in FIG. 4, when the adsorbent 1 having the honeycomb structure is molded by the extrusion molding machine 30, the adsorbent 1 is extruded in the axial direction indicated by the arrow d and simultaneously rotated in the circumferential direction indicated by the arrow e to thereby increase the thickness direction. Vent 2 inclined to
Is obtained. Alternatively, as shown in FIG. 5, a large number of oblique ventilation holes 2 are formed through a non-porous disc-shaped molded body 31 obtained by simple extrusion molding with a drill 32 so as to be formed in the thickness direction. An adsorbent 1 having a vent hole 2 inclined with respect to the adsorbent 1 is obtained. The shape of the honeycomb structure of the extrusion molding is as shown in FIGS.

In the honeycomb structure in which the ventilation holes 2 are formed in an inclined state as described above, any one or any combination of silica gel, zeolite, activated alumina, and salts having adsorptivity is used as a moisture absorbent. The dehumidifying rotor 1 is constituted by carrying by adhesion or impregnation. When a honeycomb structure is made of corrugated paper, it is preferable to further mix sepiolite and a binder.

Next, the operation of the continuous dry dehumidifier of the embodiment configured as described above will be described. By driving a motor (not shown), the dehumidifying rotor (adsorbent) 1 is driven and rotated via the central shaft 3 and the suction / exhaust fan 13 of the adsorption system is driven. The driving of the intake / exhaust fan 13 generates a negative pressure in the ducts 12, 11, and the air to be treated A
1 is sucked through the duct 11 and flows into the adsorption zone 4 of the dehumidifying rotor 1. The air to be treated A1 flowing into the first plane 1a side of the adsorption zone 4 flows through the oblique ventilation hole 2 and flows out to the second plane 1b side. The moisture contained in the air to be treated A1 is adsorbed by the moisture absorbent and comes into contact with the moisture absorbent carried on the inner surface of the pores 2 and is dried. That is, dehumidification is performed. The negative pressure generated by the intake / exhaust fan 13 is also applied to the second plane 1 b via the duct 12, and the dry air A 2 that has released moisture in the vent hole 2 has a required area according to the purpose of use via the duct 12. Supplied to The area of the dehumidifying rotor 1 that has adsorbed moisture in the adsorption zone 4 moves toward the desorption zone 5 with rotation around the central axis 3.

On the other hand, a negative pressure is generated in the ducts 16 and 14 by the driving of the intake / exhaust fan 17, and the outdoor regenerated air A3 is sucked through the duct 14 and flows into the desorption zone 5 in the dehumidifying rotor 1. The regeneration air A3 is heated while passing through the heater 15 facing the dehumidification rotor 1 at the end of the duct 14, and becomes high-temperature regeneration air A4. The high-temperature regeneration air A4 flows into the desorption zone 5 of the dehumidifying rotor 1. Further, the radiant heat from the heater 15 directly heats the dehumidifying rotor 1 in the desorption zone 5. The high-temperature regeneration air A4 flowing into the second plane 1b side of the desorption zone 5 flows through the oblique ventilation hole 2 and flows out to the first plane 1a side. While flowing through the ventilation hole 2, the moisture adsorbed by the moisture absorbent carried on the inner surface of the ventilation hole 2 comes into contact with the high-temperature regenerated air A4, evaporates, and is desorbed from the moisture absorption agent. Thereby, the dehumidifying rotor (adsorbent) 1 is regenerated. The negative pressure generated by the intake / exhaust fan 17 is also applied to the first flat surface 1 a via the duct 16. Is supplied to a required area according to the purpose of use. The region of the dehumidifying rotor 1 in which the water is desorbed and regenerated moves toward the adsorption zone 4 with the rotation around the central axis 3.

Humidified air A containing moisture from the duct 16
By returning 5 to the room, the humidity in the room increases and a humidifying effect is obtained. The humidified air A5 is discharged outside the room, and the dry air A5 is discharged.
If only 2 is sent into the room, a dehumidifying effect can be obtained.

As described above, in the continuous dry dehumidifier, the dehumidification rotor 1 continuously rotates to alternately perform the moisture adsorption and the moisture desorption, and the air flows in both the moisture adsorption process and the moisture desorption process. Since the ventilation hole 2 is inclined with respect to the thickness direction of the dehumidifying rotor 1, the flow path length of the ventilation hole 2 necessary for a required dehumidification function including adsorption and desorption is ensured, and The required thickness of the dehumidifying rotor 1 can be reduced as compared with the related art which is parallel to the thickness direction. In other words, it is not necessary to increase the size of the dehumidifying rotor 1 in order to increase the moisture adsorbing ability, and if the same moisture adsorbing ability is to be ensured, it is expected that the dehumidifying rotor 1 can be downsized.

The fact that the required thickness of the dehumidifying rotor 1 can be reduced means that the heat capacity of the dehumidifying rotor 1 can be reduced. As a result, the amount of heat required for removing the adsorbed moisture when the dehumidifying rotor 1 passes through the desorption zone 5 can be reduced. Dehumidifying rotor 1
Is improved, and the heating efficiency by the radiant heat from the heater 15 is improved. The heater 15 reduces the degree of temperature rise required when the regeneration air A3 is heated to the high-temperature regeneration air A4. As a synergistic effect, it is possible to promote the energy saving of the electric power supplied to the heater 15 and reduce the running cost (regeneration cost).

Furthermore, since the heat capacity is reduced, the cooling efficiency when the dehumidifying rotor 1 returns from the desorption zone 5 to the adsorption zone 4 is high, and the temperature in the adsorption operation in the adsorption zone 4 is lowered, so that the adsorption characteristics are improved. Become. In addition, good cooling efficiency allows the rotation speed of the dehumidifying rotor 1 to be increased, thereby improving the adsorption performance.

In terms of structure, the conventional structure in which the ventilation holes are parallel to the thickness direction of the rotor has been replaced with a simple and simple structure in which the ventilation holes are formed only in a direction inclined with respect to the thickness direction of the rotor. In other words, it is a much simpler improvement compared to the case where the adsorbent is divided and the heater is embedded between them, or the comb-shaped heat transfer member is embedded, so that the unnecessary increase in product cost is You do not need to invite.

As described above, according to the embodiment of the present invention, it is possible to reduce the energy required for regenerating the rotor while suppressing an increase in size and an increase in product cost.

[0028]

According to the first aspect of the present invention regarding the adsorbent in the dry adsorption apparatus, the vent holes are formed obliquely in the honeycomb structure, so that the necessary length of the vent holes can be ensured and the adsorbent can be used. The required thickness can be reduced, and the heat capacity of the adsorbent can be reduced. This is a much simpler structural improvement than the case where a honeycomb structure is divided and a heater or a comb-shaped heat transfer member is embedded between them, so that the product cost does not increase unnecessarily. In addition, when the adsorption capacity is to be increased, the adsorption capacity can be increased without increasing the size of the adsorbent, or when the same adsorption capacity is to be ensured, the adsorbent can be reduced in size. .

According to the second aspect of the present invention, since the honeycomb structure carries the hygroscopic agent, it is suitable for humidity control in indoor air conditioning.

According to the third aspect of the present invention, since the adsorbent having a small heat capacity is used in the dry adsorber of the continuous rotation type as described above, the amount of heat required for desorption of adsorbed components, that is, regeneration of the adsorbent can be reduced. In addition, the heat transfer efficiency to the adsorbent can be improved, the heating efficiency by the radiant heat from the heating means can be increased, and the running cost (regeneration cost) can be reduced by the energy saving in the heating means. Further, since the cooling capacity when returning from the desorption zone to the adsorption zone is improved by reducing the heat capacity and the rotation speed of the rotor can be increased, the adsorption performance can be improved. Structurally, since the ventilation holes were parallel to the rotor thickness direction in the past, it is a simple structure improvement just forming the ventilation holes in the direction inclined to the rotor thickness direction, Compared with the prior art in which the honeycomb structure is divided and a heater is embedded between the honeycomb structure and a comb-shaped heat transfer member, the product cost does not increase unnecessarily.

As described above, according to the present invention, a rotor (adsorbent) can be formed while suppressing an increase in size and an increase in product cost.
It is possible to reduce the energy required for the regeneration of refuse.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a continuous-rotation type dry adsorption device according to an embodiment of the present invention.

FIG. 2 is a dehumidifying rotor (adsorbent) in the embodiment.
Perspective and cross-sectional views of

FIG. 3 is an explanatory diagram of a method for manufacturing an adsorbent having an inclined ventilation hole according to the embodiment.

FIG. 4 is an explanatory view of another method for producing an adsorbent.

FIG. 5 is an explanatory view of still another method for producing an adsorbent.

FIG. 6 is an explanatory diagram of some honeycomb structure shapes in the embodiment.

FIG. 7 is a schematic configuration diagram of a dry suction device of a continuous rotation type according to a conventional technique.

FIG. 8 shows a dehumidifying rotor (adsorbent) in the case of the conventional technique.
Perspective and cross-sectional views of

[Explanation of symbols]

1 ... dehumidifying rotor (adsorbent), 1a ... first plane, 1b
... second plane, 2 ... vent hole, 3 ... central axis, 4 ... adsorption zone, 5 ... desorption zone, 11 ... adsorption system introduction duct, 12
... Suction-system exhaust duct, 13 ... Suction-system intake and exhaust fan,
14: introduction duct for desorption system, 15: heater, 16: exhaust duct for desorption system, 17: intake and exhaust fan for desorption system, 20
... Corrugated paper, 30 ... Extruder, 31 ...
Molded body, 32: drill, A1: treated air, A2: dry air, A3: regenerated air, A4: high-temperature regenerated air, A5: humidified air

Claims (3)

[Claims] 1. An adsorbent having a honeycomb structure having a ventilation hole penetrating from one side to another side, wherein the ventilation hole is formed to be inclined with respect to the thickness direction of the adsorbent. Adsorbent in equipment. 2. The adsorbent according to claim 1, wherein the desiccant is carried on the honeycomb structure and is constituted as a moisture adsorbent. 3. The adsorbent according to claim 1 or 2, wherein the adsorbent is constituted by a rotor rotatable around a central axis parallel to a thickness direction thereof, and a fixed angular range in a circumferential direction of the rotor is defined as an adsorption zone. , A dry adsorption device in which the remaining area is a desorption zone.