JP2002263434A - Dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifier whose energy consumption is made small. SOLUTION: This dehumidifier has a moisture absorbing body 1 made permeable a part of which is used as a dehumidifying zone 1d through which the air Ad to be dehumidified is made to pass and the other part of which is used as a regenerating zone 1r through which a regenerating gas Gr is made to pass so that each part is used as the zone 1d or the zone 1r alternately. The gas Gr is produced by mixing the combustion exhaust gas Ge from a combustion unit F with a humidity reducing gas Gm having the humidity lower than that of the gas Ge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a moisture absorbing body which is configured to be ventilated, a part of which serves as a dehumidifying area through which air to be dehumidified flows, and the other part serves as a regenerating area through which a regeneration gas flows. And each part is provided so that it may replace the dehumidification area and the regeneration area in order, The air to be dehumidified passes through the dehumidification area of the moisture absorbent, and the regeneration gas is supplied to the regeneration area of the moisture absorbent. The present invention relates to a dehumidifying device configured to allow a gas to pass therethrough.

[0002]

2. Description of the Related Art In such a dehumidifying device, each part of a moisture absorbing body is successively replaced by a dehumidifying area and a regenerating area, and in the dehumidifying area, absorbs moisture in the passing air to be dehumidified to dehumidify the air. In the regenerating region, moisture passing through the regenerating gas evaporates and is removed from the moisture absorbent and is dehumidified and regenerated, thereby continuously dehumidifying the air to be dehumidified. The air to be dehumidified by the dehumidifier is supplied to, for example, a living space such as a room, or a dehumidification target area such as a storage room for articles that dislike moisture, and is used for dehumidification of the dehumidification target area or a burner. Used as low-humidity air for processes such as air for combustion and air for powder flow in powder coating machines.

[0003] In such a dehumidifier, conventionally, as the regeneration gas, the outside air is heated to a temperature at which the moisture in the hygroscopic body can be removed by evaporation by heating means (hereinafter sometimes abbreviated as regeneration temperature). It was configured to generate.

[0004]

However, conventionally, in order to generate the regeneration gas, it is necessary to heat the room temperature outside air to the regeneration temperature, and a large amount of energy is consumed for generating the regeneration gas. Therefore, there is a problem that energy consumption is large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dehumidifier which consumes less energy.

[0006]

Means for Solving the Problems [Invention according to claim 1]
The characteristic configuration according to claim 1, wherein the regeneration gas is:
It is configured to mix and generate a combustion exhaust gas from a combustion device and a gas for lowering the humidity of the combustion exhaust gas. According to the characteristic configuration of the first aspect, by mixing the combustion exhaust gas from the combustion device and the dehumidifying gas having a lower humidity than the combustion exhaust gas, the regeneration gas is generated and generated as such. The regeneration gas passes through the dehumidifying area of the absorbent. In other words, although the flue gas from the combustion device has a higher temperature than the outside air, but contains moisture generated by combustion, by mixing the flue gas with a dehumidifying gas having a lower humidity than the flue gas. ,
The moisture absorbent is reduced to a reproducible extent and used as a regeneration gas. Therefore, since the regeneration gas is generated using the combustion exhaust gas from the combustion device having a higher temperature than the outside air, the energy consumed for generating the regeneration gas can be reduced. It has become possible to provide a dehumidifying device with a small amount.

According to a second feature of the present invention, a heating means for heating the regeneration gas without humidifying the gas is provided. According to the second aspect of the present invention, the regenerating gas is heated by the heating means without being humidified. In other words, the regeneration gas is heated without being humidified to reduce the relative humidity, and by regenerating the moisture absorbent with the regeneration gas having the reduced relative humidity, the evaporation of the moisture from the moisture absorbent is further enhanced. Since it is promoted, the regeneration state of the moisture absorbing body is improved, and the dehumidifying ability for dehumidifying the air to be dehumidified is improved. Moreover, the combustion exhaust gas is mixed with a dehumidifying gas until the temperature after the mixing becomes equal to or lower than the regeneration temperature, and the mixture is heated again to the regeneration temperature by the heating means, and the regeneration gas is mixed with the regeneration gas. Therefore, it is possible to effectively increase the amount of the dehumidifying gas mixed with the combustion exhaust gas, and it is possible to further reduce the humidity of the regeneration gas. Will be improved. By the way, in order to further improve the dehumidifying capacity,
The amount of water contained in the regeneration gas should be 40 g / kg or less (hereinafter referred to as absolute humidity and described as 40 g / kg (dry gas)) in 1 kg of the dry regeneration gas without moisture. It is more preferably 30 g / kg (dry gas) or less, and even more preferably 25 g / kg (dry gas) or less. Therefore, the dehumidifying capacity for dehumidifying the air to be dehumidified can be further improved while reducing energy consumption.

The invention according to claim 3 is characterized in that the air to be dehumidified that has passed through the dehumidification area is supplied to the dehumidification target area, and the low humidity Switching means for switching between an outside air mixing state in which outside air is mixed as a forming gas and a return air mixing state in which air in the dehumidification target area is mixed is provided.
According to the characteristic configuration of the third aspect, the dehumidification target air that has passed through the dehumidification region and is dehumidified is supplied to the dehumidification target region, and the dehumidification target region is dehumidified. When the dehumidifier is operated to dehumidify the air, the switching means uses the switching means to mix the outside air with the combustion exhaust gas as the dehumidifying gas and the air in the dehumidification target area (hereinafter referred to as return air). ) Can be switched to the return air mixing state in which is mixed. That is, for example, it is possible to switch between the outside air mixing state and the return air mixing state by the switching unit in accordance with the situation of giving priority to improving the ability to dehumidify the dehumidification target area or giving priority to energy saving. For example, when the temperature and absolute humidity of the air in the dehumidification target area and the outside air are compared under the same condition where the regeneration temperature of the hygroscopic body is the same, and priority is given to improving the dehumidification capacity of the dehumidification target area,
The mixture is switched to the mixing state in which the lower absolute humidity of the outside air and the return air is mixed, and when the energy saving is prioritized, the mixture is switched to the mixing state in which the higher temperature of the outside air and the return air is mixed. Therefore, when dehumidifying the dehumidification target area, it is possible to switch between the outside air mixing state and the return air mixing state according to various situations, so that usability can be improved.

According to a fourth aspect of the present invention, the combustion exhaust gas for generating the regeneration gas heats the absorbent for regeneration in an absorption type chiller / heater. It is the combustion exhaust gas from the combustion device provided for the purpose. According to the characteristic configuration of claim 4, by mixing the combustion exhaust gas from the combustion device provided to heat the absorbent for regeneration in the absorption chiller / heater and the dehumidifying gas, A regeneration gas is generated. In other words, the temperature of the dehumidification target area is adjusted using the chilled / hot water generated by the absorption chiller / heater, and a regeneration gas is generated using the combustion exhaust gas from the combustion device of the absorption chiller / heater. By operating the dehumidifier using the regeneration gas, the dehumidification target area is dehumidified with less energy consumption. Therefore, in order to control the temperature of the dehumidification target area and to perform dehumidification and air conditioning while reducing energy consumption,
A preferred embodiment can be provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an air conditioning system configured by using a dehumidifier D according to the present invention. This air conditioner system includes, in addition to the dehumidifier D, an absorption chiller / heater R and an air conditioning target room S (in the dehumidification target area). (Equivalent) is provided. Then, the air to be dehumidified Ad that has been dehumidified by the dehumidifier D is supplied to the room to be air-conditioned S through the dehumidifying air passage 6 to dehumidify the room to be air-conditioned S, and the absorption type chiller / heater R
Is cooled and heated by the fan coil unit U in which the cold and hot water generated in the above is circulated and supplied through the cold and hot water circulation path 37, and the air conditioning room S is air-conditioned.

The dehumidifying device D includes a dehumidifying rotor 1 as a dehumidifying member which is configured to be able to ventilate, a part of which serves as a dehumidifying region 1d through which the air to be dehumidified flows, and the other part through which a regeneration gas Gr flows. The dehumidification target air Ad is passed through the dehumidification region 1d of the dehumidification rotor 1 and the regeneration gas Gr is supplied. The dehumidifying rotor 1 is configured to pass through the regeneration region 1r.

In the present invention, as the regeneration gas Gr, the combustion exhaust gas Ge from the combustion device F and the gas for lowering the humidity of the combustion exhaust gas Ge are mixed and generated. In the first embodiment, the combustion exhaust gas Ge for generating the regeneration gas Gr includes:
In the absorption chiller / heater R, the combustion exhaust gas Ge from the combustion device F provided to heat the absorption liquid for regeneration is used.

The dehumidifier D will be described with reference to FIGS. The dehumidifying device D includes a cylindrical dehumidifying rotor inside a casing 4 in which a dehumidifying flow path 2 through which dehumidification target air Ad flows and a regeneration flow path 3 through which regeneration gas Gr flows. 1 is rotated by the electric motor 5 around the axis of the cylinder as a rotation axis, with a part of the cylinder 1 located in the dehumidifying channel 2 and another portion located in the regeneration channel 3 in the circumferential direction. It is provided so as to be performed. The dehumidifying rotor 1 is provided with a honeycomb-shaped base material capable of ventilation in the direction of the rotation axis, and a hygroscopic agent (silica gel, lithium chloride, or the like).
Is held. That is, in the dehumidifying rotor 1, a portion located in the dehumidifying channel 2 is a dehumidifying region 1 d, a portion located in the regenerating channel 3 is a regenerating region 1 r, and the dehumidifying rotor 1 is rotated by the electric motor 5. Accordingly, each part of the dehumidifying rotor 1 is sequentially replaced with the dehumidifying area 1d and the regeneration area 1r.

The outlet of the dehumidifying passage 2 and the room S to be air-conditioned are connected by a dehumidifying air passage 6.
In the portion of the dehumidification rotor 1 on the upstream side of the dehumidification region 1d,
A dehumidifying blower 7 is provided, and by the ventilating action of the dehumidifying blower 7, the outside air Ao is sucked in from the channel inlet as air to be dehumidified, passed through the dehumidifying region 1 d of the dehumidifying rotor 1, and then dehumidified. It is configured to supply to the room S to be air-conditioned through the road 6. A filter 8 for dust reduction is provided at the flow path inlet of the dehumidifying flow path 2.

In the regeneration channel 3, the dehumidifying rotor 1
Is located on the downstream side of the regeneration region 1r.
Is sucked from the inlet of the flow passage, and the regeneration area 1 of the dehumidifying rotor 1 is sucked.
r, after passing through the outlet of the flow path, a regeneration blower 9 is provided, and steam for heating the regeneration gas Gr flowing to the portion of the dehumidification rotor 1 upstream of the regeneration region 1r. A heater (corresponding to a heating means for heating the regeneration gas Gr without humidification) 10 is provided, and a filter 11 for dust reduction is provided at a flow path inlet of the regeneration flow path 3. The steam heater 10 is configured to indirectly heat the regeneration gas Gr with steam flowing through the heat transfer tube.

A regeneration gas flow path 12 is connected to the flow path entrance of the regeneration flow path 3, and is discharged from a flue 36 of the absorption refrigerator R at an upstream end of the regeneration gas flow path 12. The exhaust gas flow path 13 for guiding the exhausted combustion exhaust gas Ge, the external air flow path 14 for introducing the external air Ao from the upstream end, and the return air flow path 15 for returning the return air Ar from the air-conditioned room S are connected to each other. . The outside air passage 14 is provided with an outside air damper 16 for interrupting the supply of outside air Ao through the outside air passage 14 and adjusting the supply amount. The return air passage 15 is provided with the outside air passage 15 through the return air passage 15. The supply of the return air Ar is intermittently provided, and a return air damper 17 for adjusting the supply amount is provided.

That is, by opening the outside air damper 16 and closing the return air damper 17, the outside exhaust gas Am is mixed with the combustion exhaust gas Ge as the low-humidification gas Gm. Is closed, and the return air damper 17 is opened, so that the return gas Ar is mixed with the combustion exhaust gas Ge as the low-humidification gas Gm. That is, the outside air damper 1
A switching means for switching between the outside air mixing state and the return air mixing state is constituted by 6 and the return air damper 17.

An outside air humidity sensor 18 for detecting the relative humidity of the outside air Ao, an outside air temperature sensor 19 for detecting the temperature of the outside air Ao, and a return for detecting the relative humidity of the air in the air-conditioned room S, ie, the return air Ar. An air humidity sensor 20 and a return air temperature sensor 21 for detecting the temperature of the return air Ar are provided. Further, a control unit 22 for performing various controls of the dehumidifying device D and an operation unit 23 for instructing the control unit 22 of control information are provided.

Next, the control operation of the control unit 22 will be described. The operation unit 23 includes, in addition to an operation switch (not shown) for instructing start and stop of operation, a dehumidification priority mode in which the dehumidification device D is operated with an increased dehumidification capacity, and an operation in which energy consumption is reduced in operating the dehumidifier D. There is provided a mode changeover switch (not shown) for switching the operation mode between the energy saving priority mode and the humidity setting section for setting the target humidity. The storage unit (not shown) of the control unit 22 stores a humid air chart, and the control unit 22 stores the humid air chart storage information and the relative humidity of the outside air Ao detected by the outside air humidity sensor 18. And, based on the temperature of the outside air Ao detected by the outside air temperature sensor 19, the absolute humidity of the outside air Ao is obtained, and the stored information of the humid air chart and the return air detected by the return air humidity sensor 20 The absolute humidity of the return air Ar is determined based on the relative humidity of Ar and the temperature of the return air Ar detected by the return air temperature sensor 21.

When a start of operation is instructed from the operation unit 23, the control unit 22 operates the electric motor 5, rotates the dehumidifying rotor 1, heats the steam heater 10, and operates the dehumidifying blower 7 and Activate the regeneration blower 9 and
When the operation of the dehumidifying operation is started and an operation stop command is issued from the operation unit 23, the electric motor 5 is stopped and the steam heater 10 is stopped.
Is stopped, and the dehumidifying fan 7 and the regenerating fan 9 are stopped to stop the operation of the dehumidifying operation. During operation, the rotation speed of the dehumidifying blower 7 is adjusted so that the relative humidity of the return air Ar detected by the return air humidity sensor 20 becomes the target humidity set by the humidity setting unit of the operation unit 23. Is adjusted to adjust the flow rate of the dehumidification target air Ad.

When the dehumidification priority mode is instructed from the operation unit 23, the control unit 22 calculates the absolute humidity of the outside air Ao and the absolute humidity of the return air Ar, compares them, and compares the absolute humidity of the outside air Ao. Is lower, the outside air damper 16 is opened, the return air damper 17 is closed and the outside air is mixed, and when the absolute humidity of the return air Ar is lower, the outside air damper 16 is closed and the return air is closed. The use damper 17 is opened to bring the return air mixture state. When the energy saving priority mode is instructed, the temperature of the outside air Ao detected by the outside air temperature sensor 19 is compared with the temperature of the return air Ar detected by the return air temperature sensor 21 to determine the temperature of the outside air Ao. When the temperature is higher, the outside air damper 16 is opened, the return air damper 17 is closed, and the outside air is mixed, and when the temperature of the return air Ar is higher, the outside air damper 16 is closed and the return air is closed. The use damper 17 is opened to bring the return air mixture state.

It should be noted that the flue gas G
e, the mixing amount of the outside air Ao to be mixed is set in advance,
The opening degree of the outside air damper 16 is set so that the set amount of outside air Ao is supplied, and the control unit 22 operates the outside air damper 16 so that the set opening degree is obtained. Control. Similarly, in the return air mixing state, the mixing amount of the return air Ar mixed with the combustion exhaust gas Ge is set in advance, and the return air damper 17 is supplied so that the set mixing amount of the return air Ar is supplied. The opening is set and the control unit 2
No. 2 controls the operation of the return air damper 17 so as to reach the set opening degree.

When the dehumidifier D is operated, the outside air Ao is used as dehumidification target air Ad by the ventilation action of the dehumidification blower 7.
Flows through the dehumidifying channel 2. When the dehumidification target air Ad flowing through the dehumidification flow path 2 passes through the dehumidification region 1d of the dehumidification rotor 1, the moisture contained therein is absorbed by the desiccant of the dehumidification rotor 1 and dehumidified. The dehumidified air Ad thus dehumidified is supplied to the air-conditioned room S through the dehumidified air passage 6.

When the outside air is mixed, the exhaust gas Ge from the combustion device F is guided through the exhaust gas passage 13 by the ventilation action of the regeneration blower 9, and the outside air Ao is taken in from the upstream end of the outside air passage 14 through the intake port. Then, the intake outside air Ao is guided through the outside air passage 14 and the combustion exhaust gas Ge
And the outside air Ao flow into the regeneration gas flow path 12 and are mixed,
The mixture is used as the regeneration gas Gr as the regeneration gas flow path 12.
Is supplied to the regeneration channel 3 through the
Through the outlet of the flow path.

In the mixed state of the return air, the exhaust gas Ge from the combustion device F is guided through the exhaust gas passage 13 and the return air Ar is guided through the return air passage 15 by the ventilation action of the regeneration blower 9. Then, the combustion exhaust gas Ge and the return gas Ar flow into the regeneration gas channel 12 and are mixed, and the mixture is supplied to the regeneration channel 3 through the regeneration gas channel 12 as the regeneration gas Gr, It flows through the regeneration channel 3 and is discharged from the channel outlet

The regeneration gas Gr flowing through the regeneration channel 3 is heated by the steam heater 10 and then passes through the regeneration region 1r of the dehumidification rotor 1, so that the moisture is absorbed by the moisture absorbent. The water is removed by being heated and evaporated by the passing regeneration gas Gr, and the dehumidification rotor 1 is regenerated. Since the regeneration gas Gr heated by the steam heater 10 and having a reduced relative humidity passes through the regeneration region 1r of the dehumidification rotor 1, the ability to remove moisture from the moisture absorbent is further improved.

Since the absorption-type water heater / heater R is well known, a detailed description thereof will be omitted, but an evaporator 31 for evaporating the refrigerant liquid is provided.
And an absorber 32 for absorbing the refrigerant vapor generated by the evaporator 31 into the absorbing liquid, and regenerating the absorbing liquid by heating the diluted absorbing liquid generated by the absorber 32 to generate the refrigerant vapor. A regenerator 33 and a condenser 34 for condensing the refrigerant vapor generated in the regenerator 33 are provided, and can be switched between a cold water generating operation for generating cold water and a hot water generating operation for generating hot water. It is composed. Although a detailed description is omitted, the cold water generation operation is performed to obtain cold water based on the latent heat of evaporation by refrigerant evaporation in the evaporator 31, and the hot water generation operation is performed by the refrigerant vapor generated in the regenerator 33. Is supplied to the evaporator 31 to obtain hot water using the refrigerant vapor as a heat source, or to obtain hot water using the heat of absorption generated by the absorber 32 and the heat of condensation generated by the condenser 34 as heat sources. I do.

In the regenerator 33, a combustion chamber 35 is formed.
The combustion device F is provided to burn fuel gas such as city gas in the combustion chamber 35, and is configured to heat the absorbing liquid by the heat of combustion. The combustion exhaust gas Ge generated from the combustion device F is configured to be discharged through the flue 36.

The fan coil unit U is provided with a heat transfer tube 38 connected to the absorption refrigerator R through a cold / hot water circulation path 37.
And an air-conditioning blower 39 for ventilating the air in the air-conditioned room S so as to pass through the heat transfer tube 38. When the room S to be air-conditioned is cooled, the absorption chiller R is operated in the cold water generating operation to supply cold water to the fan coil unit U, and when the room S to be air-conditioned is heated, the absorption refrigeration is performed. The machine R is operated in the hot water generating operation to supply hot water to the fan coil unit U.

Next, the results of verifying the performance of the dehumidifier configured as described above will be described. In the verification test, the dehumidifying device according to the present invention (hereinafter abbreviated as the present device),
The performance of each of two types of dehumidifiers (hereinafter, abbreviated as comparative devices 1 and 2) not having the characteristic configuration of the present invention was compared. Both the device of the present invention and the comparison devices 1 and 2
The dehumidifying rotor 1 used was one holding silica gel as a desiccant, and the regeneration temperature of the dehumidifying rotor 1 was set at 140 ° C. The ratio of the area of the dehumidifying area 1d to the area of the regenerating area 1r in the dehumidifying rotor 1 is 3: 1, and the surface velocity of each of the dehumidifying air Ad and the regenerating gas Gr (the air volume converted to 30 ° C. Divided by the cross-sectional area of
Is set to 2 m / s, and the diameter of the dehumidifying rotor 1 is set, and the thickness of the dehumidifying rotor 1 is set to 200 mm. Hereinafter, test conditions and results of each of the device of the present invention and the comparison devices 1 and 2 will be described. (Apparatus of the present invention) Test conditions: The combustion exhaust gas Ge from the combustion device F of the absorption type chiller / heater R has a temperature of 180 ° C and a moisture ratio of 14.5.
%, the temperature of the outside air Ao was 30 ° C., and the absolute humidity was 17 g / kg (dry air). Then, the operation was performed in a mixed state of the outside air, and the combustion exhaust gas Ge of 230 m ³ / h (converted to 30 ° C.) was added with the air Ao of 1388 m ³ / h.
And the air-fuel mixture is
Reheat to 40 ° C, absolute humidity 30g / kg
1618 m ³ / h of regeneration gas (dry gas) was generated and passed through the regeneration region 1 r of the dehumidification rotor 1. The dehumidification target air Ad is 4850 m ³ /
The outside air Ao of h passed through the dehumidification area 1d of the dehumidification rotor 1. Result: The absolute humidity of the dehumidification target air Ad that passed through the dehumidification region 1d of the dehumidification rotor 1 was 9.8 g / kg.
(Dry air), and the relative humidity when the dehumidification target air Ad passed through this dehumidification area 1d and cooled to 30 ° C. was 37%. The energy consumed by the steam heater 10 to generate the regeneration gas Gr by heating the air-fuel mixture was 45 kW.

(Comparative device 1) Test conditions: outside air Ao under the same conditions as in the case of the above-described device of the present invention.
Was heated to 140 ° C. by a steam heater to generate a regeneration gas Gr of 1618 m ³ / h, which was passed through the regeneration region 1 r of the dehumidification rotor 1. Air to be dehumidified Ad
Is the same condition as in the case of the above-mentioned device of the present invention. Result: The performance of dehumidifying the air to be dehumidified Ad was substantially the same as that of the above-described device of the present invention, but the energy consumed to heat the outside air Ao to generate the regeneration gas Gr was the same as that of the above-described device of the present invention. 24% more than was the case.

(Comparative device 2) Test conditions: The combustion exhaust gas Ge under the same conditions as in the case of the above-described device of the present invention was cooled to 140 ° C., and the regeneration gas Gr was reduced by 1%.
618 m ³ / h and the regeneration area 1 of the dehumidifying rotor 1
r. The dehumidification target air Ad is under the same conditions as in the case of the above-described device of the present invention. Result: The absolute humidity of the dehumidification target air Ad passed through the dehumidification region 1d of the dehumidification rotor 1 was 13 g / kg (dry air), and the dehumidification target air passed through this dehumidification region 1d and dehumidified. The relative humidity when the Ad was cooled to 30 ° C. was 48%.

As can be seen from the results of the verification test described above, the dehumidifier of the present invention is compared with the comparative device 1 (corresponding to the prior art) which generates the regeneration gas Gr by heating the outside air Ao to the regeneration temperature. In addition, the energy consumed for generating the regeneration gas can be reduced, and the dehumidification performance can be significantly improved as compared with the comparison device 2 that generates the regeneration gas Gr using only the combustion exhaust gas Ge.

Hereinafter, each of the second and third embodiments of the present invention will be described. In each embodiment, the same components and components having the same functions as those in the first embodiment will be described in order to avoid redundant description. , The description is omitted by giving the same reference numerals, and the configuration different from the first embodiment will be mainly described.

[Second Embodiment] Hereinafter, a second embodiment will be described. FIG. 2 shows an air conditioning system configured by using a dehumidifying device D according to the present invention. This air conditioning system includes, in addition to the dehumidifying device D, an air conditioning device C for cooling and heating an air-conditioned room S (corresponding to a dehumidifying region). It is provided with. As the air conditioner C, various well-known air conditioners can be used. For example, an air conditioner having a gas engine driven heat pump in which a compressor is driven by a gas engine or a motor driven heat pump in which a compressor is driven by an electric motor can be used. What you have can be used. In FIG. 2, B is a once-through boiler provided to supply steam to a steam demand destination.

In the second embodiment, the dehumidifier D
Is the combustion exhaust gas Ge from the combustion device F of the once-through boiler B as the combustion exhaust gas Ge for generating the regeneration gas Gr.
The configuration is the same as that of the above-described first embodiment, except that it is configured to use.

The dehumidified air Ad dehumidified by the dehumidifier D is supplied to the air-conditioned room S as the dehumidified area through the dehumidified air passage 6, as in the first embodiment. Is dehumidified, and the air-conditioning apparatus C cools and heats the room S to be air-conditioned to air-condition the room S to be air-conditioned.

Since the once-through boiler B is well known, its detailed description is omitted.
Is disposed in a vertical position, and the central cavity of the annular water pipe group 42 is used as a combustion chamber 43, and the combustion apparatus F is set in the upper part of the can body 41 so as to burn fuel gas such as city gas in the combustion chamber 43. And the flue gas Ge generated from the combustion device F
Is passed through so as to heat the annular water pipe group 42 and then discharged from the flue 44.

Next, the result of verifying the performance of the dehumidifier configured as described above will be described. In the verification test, the dehumidifying device according to the present invention (hereinafter abbreviated as the present device),
And, the performance of each dehumidifier not provided with the characteristic configuration of the present invention (hereinafter, abbreviated as comparative device 3) was compared. In both of the present invention device and the comparative device 3, the dehumidifying rotor 1 uses silica gel as a hygroscopic agent,
The regeneration temperature of the dehumidifying rotor 1 was set at 82.5 ° C.
The dehumidifying area 1d and the regenerating area 1d in the dehumidifying rotor 1
The ratio of the area to the area r is 1: 1 and, as in the first embodiment, the surface velocity of each of the dehumidifying air Ad and the regeneration gas Gr (the value obtained by dividing the air volume converted to 30 ° C. by the respective cross-sectional areas). ) Was set to 2 m / s, the diameter of the dehumidifying rotor 1 was set, and the thickness of the dehumidifying rotor 1 was set to 200 mm. Hereinafter, test conditions and results of the present invention apparatus and the comparison apparatus 3 will be described. In the present invention apparatus, the performance was verified by operating in each of the outside air mixing state and the return air mixing state. And the results in each of the return air mixing states will be described. (Apparatus of the present invention) Test conditions in a mixed state of outside air; combustion device F of once-through boiler B
The exhaust gas Ge from the furnace has a temperature of 400 ° C., a moisture content of 14.5 vol%, and a temperature of the outside air Ao of 30 ° C.
° C, absolute humidity was 17 g / kg (dry air).
Then, 1388 m ³ / h of outside air Ao is mixed with 230 m ³ / h (30 ° C. conversion) of flue gas Ge, and the temperature is 82.5 ° C. and the absolute humidity is 30 g / kg (dry gas).
Was generated at 1618 m ³ / h and passed through the regeneration region 1 r of the dehumidification rotor 1. Air A to be dehumidified
As d, the ambient air Ao of 1618 m ³ / h under the same conditions as above
Was passed through the dehumidification area 1d of the dehumidification rotor 1. Result in mixed state of outside air; dehumidifying region 1d of dehumidifying rotor 1
The absolute humidity of the dehumidification target air Ad dehumidified by passing through
It was 9 g / kg (dry air), and the relative humidity when the dehumidification target air Ad passed through this dehumidification area 1d and cooled to 30 ° C. was 34%.

Test conditions in a mixed state of return air; once-through boiler B
The combustion exhaust gas Ge from the combustion device F has a temperature of 400 °
C, the water content was 14.5 vol%,
Had a temperature of 26 ° C. and an absolute humidity of 9.5 g / kg (dry air). Then, 1388 m ³ / h of return air Ar is added to the combustion exhaust gas Ge of 230 m ³ / h (converted to 30 ° C.).
Were mixed to generate a regeneration gas Gr, which was passed through the regeneration region 1r of the dehumidification rotor 1. As the air to be dehumidified, 1618 m ³ / h of outside air Ao under the same conditions as above was passed through the dehumidification region 1 d of the dehumidification rotor 1. Result in mixed state of return air; dehumidifying region 1d of dehumidifying rotor 1
The absolute humidity of the dehumidification target air Ad dehumidified by passing through
8.6 g / kg (dry air).
And the relative humidity when the dehumidification target air Ad dehumidified and cooled to 30 ° C. was 32%. (Comparative device 3) Test conditions: The combustion exhaust gas Ge under the same conditions as in the case of the above-described device of the present invention was cooled to 82.5 ° C., and a regeneration gas Gr was generated at 1618 m ³ / h. Through the reproduction area 1r. The dehumidification target air Ad is under the same conditions as in the case of the above-described device of the present invention. Result: The absolute humidity of the dehumidification target air Ad that passed through the dehumidification region 1d of the dehumidification rotor 1 was 13.5 g / kg.
(Dry air), and the relative humidity when the dehumidified air Ad passed through the dehumidification area 1d and cooled to 30 ° C. was 51%.

As can be seen from the results of the verification test described above, the dehumidifying apparatus of the present invention can improve the dehumidifying performance as compared with the comparative configuration 3 in which the regeneration gas Gr is generated only from the combustion exhaust gas Ge. In the dehumidifier of the present invention, when a gas having a low absolute humidity is used as the dehumidifying gas Gm mixed with the combustion exhaust gas Ge from the combustion device F in order to generate the regeneration gas Gr, the dehumidifying performance is improved. can do.

[Third Embodiment] The third embodiment will be described below. FIG. 3 shows an air conditioning system configured by using a dehumidifying device D according to the present invention. This air conditioning system includes, in addition to the dehumidifying device D, an absorption type chiller / heater R, as in the first embodiment. , Air-conditioned room S (corresponding to dehumidification target area)
Is provided with the fan coil unit U provided in the first embodiment.

In the third embodiment, the return air flow path 15 is directly connected to the flow path inlet of the regeneration flow path 3, and the return air flow as the dehumidification gas Gm flowing through the regeneration flow path 3 is burned. The exhaust gas passage 13 is connected to a part of the regeneration passage 3 on the upstream side of the dehumidification rotor 1 so as to generate the regeneration gas Gr by mixing the exhaust gas Ge.

Further, the flue gas Ge is provided in the regeneration passage 3.
Dehumidifier cooler 2 for cooling the return air Ar before mixing
4, and heat for exchanging the return air Ar before being mixed with the combustion exhaust gas Ge after being cooled by the dehumidification type cooler 24 with the dehumidification target air Ad after being passed through the dehumidification rotor 1 and dehumidified. An exchanger 25 is provided. By the way, heat exchanger 25
Various types can be used, such as a rotary rotor type, a stationary cross-flow type, and a type using a heat pipe.

The exhaust gas passage 13 is provided with a heat exchanger 25.
Is connected to the regeneration flow path 3 so as to mix the flue gas Ge with the return air Ar that has passed through the steam generator 10. The steam heater 10 generates the regeneration gas generated by mixing the combustion exhaust gas Ge and the return air Ar. It is provided in the regeneration channel 3 so as to heat Gr.

That is, the heat exchange between the return air Ar in the heat exchanger 25 and the dehumidification target air Ad after passing through the dehumidification rotor heats the return air Ar, so that the amount of heat input to the steam heater 10 can be reduced. Further, since the dehumidification target air Ad after passing through the dehumidification rotor is cooled, the sensible heat load can be reduced depending on the temperature control target temperature of the air conditioning target room S. In addition, it is possible to greatly save energy.

In the third embodiment, the regeneration gas Gr is formed by mixing the combustion exhaust gas Ge with the return air Ar as the dehumidification gas Gm. The switching means provided in the embodiment is omitted. The outside air humidity sensor 1 provided in the first embodiment
8, the outside air temperature sensor 19, and the mode changeover switch of the operation unit 23 are omitted.
A control configuration for switching between the outside air mixing state and the return air mixing state is omitted.

Next, the results of verifying the performance of the dehumidifier configured as described above will be described. In the verification test, the dehumidifying device according to the present invention (hereinafter abbreviated as the present device),
And the performance of each dehumidifier (hereinafter, abbreviated as “comparator 4”) not having the characteristic configuration of the present invention was compared. In both the present invention apparatus and the comparative apparatus 4, the dehumidifying rotor 1 uses silica gel as a hygroscopic agent,
The regeneration temperature of the dehumidifying rotor 1 was set to 80 ° C. or,
The dehumidifying air Ad and the regeneration gas Gr in the dehumidifying rotor 1 have respective surface velocities (values obtained by dividing the air volume converted to 30 ° C. by the respective cross-sectional areas) of 2.66 m / s. The diameter of the rotor 1 is set, and the rotor 1 for dehumidification is set.
Was set to 200 mm. Hereinafter, the device of the present invention,
The test conditions and results of each of the comparison devices 4 will be described. (Apparatus of the present invention) Test conditions: The combustion exhaust gas Ge from the combustion device F of the absorption type water heater / heater R has a temperature of 180 ° C and an absolute humidity of 108.6.
g / kg (dry gas), the return air Ar is 26 ° C,
The relative humidity was 60%, the absolute humidity was 12.6 g / kg (dry air), the temperature of the outside air Ao was 34.8 ° C., and the absolute humidity was 18.6 g / kg (dry air). Then, the combustion exhaust gas Ge of 229.5 m ³ / h (30 ° C. conversion) was mixed with the return air Ar of 3651 m ³ / h, and the absolute humidity after passing through the steam heater 10 was 20 g / kg (dry gas). 3) m ³ / h of the regeneration gas Gr) was generated and passed through the regeneration region 1 r of the dehumidification rotor 1. As the air to be dehumidified, 3880 m ³ / h under the same conditions as above
Was passed through the dehumidifying region 1d of the dehumidifying rotor 1. Result: The absolute humidity of the dehumidification target air Ad passed through the dehumidification region 1d of the dehumidification rotor 1 is 11.77 g / k.
g (dry air), the temperature is 29.5 ° C., and the throughput of sensible heat and latent heat determined from the enthalpy difference is 2
7.6 kW, energy consumed by the steam heater 10 is 2
The temperature was 0.2 kW (the temperature rise width was 16.2 ° C.), and the coefficient of performance COP was 1.37.

(Comparison device 4) Test conditions: As the regeneration gas Gr, the outside air Ao under the same conditions as in the case of the above-mentioned device of the present invention was used, and the air Ad to be dehumidified was
The conditions are the same as in the case of the above-described device of the present invention. Result: The absolute humidity of the dehumidification target air Ad that passed through the dehumidification area 1d of the dehumidification rotor 1 was 11.04 g / k.
g (dry air), the temperature is 29.5 ° C., and the throughput of sensible heat and latent heat obtained from the enthalpy difference is 3
0.1 kW, energy consumed by the steam heater 10 is 2
The temperature was 9.3 kW (the temperature rise width was 23.5 ° C.), and the coefficient of performance COP was 1.03.

As can be seen from the results of the verification test described above, the dehumidifying apparatus of the present invention is different from the comparative apparatus 4 (corresponding to the prior art) which generates the regeneration gas Gr by heating the outside air Ao to the regeneration temperature. In addition, the energy consumed for generating the regeneration gas can be reduced by about 25%.

[Another Embodiment] Next, another embodiment will be described. (A) In each of the first and second embodiments described above, a cooling device that cools the dehumidification target air Ad that has passed through the dehumidification region 1d of the dehumidification rotor 1 may be provided.

(B) In each of the above first and second embodiments, the switching between the return air mixing state and the outside air mixing state by the opening / closing operation of each of the outside air damper 16 and the return air damper 17 is performed manually. You may be comprised so that it may perform.

(C) As the regeneration gas Gr, the flue gas Ge from the combustion device F and the gas Gm having a lower humidity than the flue gas Ge are mixed and generated. In each of the second and third embodiments, the flue gas Ge contains the outside air A as the dehumidifying gas Gm.
An example has been described in which the configuration is such that it can be switched between an outside air mixing state in which o is mixed and a return air mixing state in which return air Ar is mixed as the dehumidifying gas Gm. Instead, the outside air A is added to the combustion exhaust gas Ge as the dehumidifying gas Gm.
o may be mixed. Alternatively, the outside air Ao and the return air Ar are added to the combustion exhaust gas Ge as the humidity reducing gas Gm.
Or a gas other than the outside air Ao and the return air Ar may be mixed into the combustion exhaust gas Ge as the gas for reducing humidity Gm.

(D) The specific structure of the heating means for heating the regeneration gas Gr without humidification is not limited to the steam heater 10 illustrated in each of the above embodiments, and may be, for example, an electric heater. Alternatively, it may be configured to indirectly heat with a burner, or to perform heat exchange with a high-temperature fluid other than steam. (E) In each of the above embodiments, the steam heater 10 can be omitted.

(F) The dehumidification target air Ar is not limited to the outside air Ao exemplified in each of the above-described embodiments, and may be, for example, return air Ar from the dehumidification target area S.

(G) A part of the moisture absorber is a dehumidification area 1d through which the air to be dehumidified flows, the other part is a regeneration area 1r through which the regeneration gas Gr flows, and each part is a dehumidification area 1d. The specific configuration for sequentially providing the data and the reproduction area 1r is not limited to the configuration exemplified in each of the above embodiments. For example, a moisture absorber is fixedly provided, and the moisture absorber is divided into two or more regions. Then, in a state where a region through which the dehumidification target air Ad flows and a region through which the regeneration gas Gr flows simultaneously, the dehumidification target air Ad and the regeneration gas Gr are sequentially passed through each region by a damper or the like. Switch so that That is, the region through which the dehumidification target air Ad flows is the dehumidification region 1d, and the region through which the regeneration gas Gr flows is the regeneration region 1r.

(H) In configuring an air conditioning system using the dehumidifier of the present invention, an air conditioner C equipped with a gas engine driven heat pump is provided as an air conditioner C for cooling and heating the room S to be air-conditioned to generate a regeneration gas Gr. The combustion exhaust gas Ge from the gas engine (corresponding to the combustion device F) of the gas engine driven heat pump may be used as the combustion exhaust gas Ge for performing this.

(I) The supply source of the combustion exhaust gas Ge for generating the regeneration gas Gr is limited to the combustion device F of the absorption refrigerator R and the combustion device F of the once-through boiler B exemplified in the above embodiment. Instead, it is possible to use various combustion devices F such as gas turbines and combustion devices F of various furnaces.

(V) The use of the dehumidifier according to the present invention is as follows.
It is not limited to dehumidification of the dehumidification target area as exemplified in each of the above embodiments, for example, for generating low humidity air for processes such as combustion air for burners and air for powder flow of powder coating machines. Can be used.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a dehumidifier according to a first embodiment and an air conditioning system including the dehumidifier.

FIG. 2 is a diagram illustrating a configuration of a dehumidifier according to a second embodiment and an air conditioning system including the dehumidifier.

FIG. 3 is a diagram illustrating a configuration of a dehumidifying device according to a third embodiment and an air conditioning system including the dehumidifying device.

FIG. 4 is a perspective view of a main part of the dehumidifying device according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hygroscopic body 1d Dehumidification area 1r Regeneration area 10 Heating means 16, 17 Switching means Ao Outside air Ad Dehumidification target air Ar Air in the dehumidification target area F Combustion device Ge Combustion exhaust gas Gm Dehumidification gas Gr Regeneration gas R Absorption refrigerator S Dehumidification target area

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L053 BC03 4D052 AA08 AA09 CB00 DA01 DA02 DA03 DB01 FA05 GA01 GB01 GB02 GB03 GB08 HA01 HA14 HB02

Claims (4)

[Claims] A part of a moisture-absorbing body that is configured to be ventilated serves as a dehumidifying area through which air to be dehumidified flows, another part serves as a regenerating area through which a regenerating gas flows, and each part includes the dehumidifying section. A region that is sequentially replaced with the regeneration region, wherein the air to be dehumidified passes through the dehumidification region of the moisture absorber, and the regeneration gas passes through the regeneration region of the moisture absorber. A dehumidifier configured to generate, as the regeneration gas, a mixture of a combustion exhaust gas from a combustion device and a gas for lowering the humidity of the combustion exhaust gas. 2. The dehumidifier according to claim 1, further comprising a heating means for heating the regeneration gas without humidification. 3. A dehumidification target, wherein dehumidification target air passed through the dehumidification region is supplied to a dehumidification target region, and an outside air mixing state in which outside air is mixed as the dehumidification gas and the dehumidification target The dehumidifier according to claim 1 or 2, further comprising a switching means for switching to a return air mixing state in which air in the region is mixed. 4. The combustion exhaust gas for generating the regeneration gas is a combustion exhaust gas from a combustion device provided for heating an absorbent for regeneration in an absorption chiller / heater. The dehumidifier according to any one of claims 3 to 3.