KR20190039887A - Gas Humidity Control Method and Regulator - Google Patents

Abstract

And to provide a gas humidity control method and regulator that can adjust the temperature during the humidity control and improve the humidity-control efficiency. A method for controlling air humidity for a gas to be treated, comprising the steps of: flowing a first medium (22) onto a heat exchange pipe (17) of a gas-liquid contact portion (18) in a dehumidifier (11); On the other hand, the second medium (24) passes through the heat exchange pipe (17). In this state, air is supplied from the inlet 14 into the gas-liquid contact case 13 and gas-liquid contact is made by the first medium 22 on the gas-liquid contact 18, 1 medium (22). The first medium 22 contains an ionic liquid having a high degree of absorption. The temperature of the first medium 22 is controlled by the second medium 24. Thereafter, the treated air is discharged from the outlet 15 of the gas-liquid contact case 13.

Description

Gas Humidity Control Method and Regulator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a regulator for regulating moisture in air, i.e., humidity, in a hospital, a nursing home, an office, an exercise facility, a food factory, and a pharmaceutical factory.

Such a regulator is known as a liquid-moisture-absorbing air conditioner using a liquid absorbent (desiccant). The liquid-hygroscopic air conditioner is combined with a heat pump for separating the latent heat and the sensible heat, and an energy-saving air conditioning system can be constructed.

For example, a wet type moisture absorber is disclosed in Patent Document 1. The wet type moisture absorber includes a dehumidifying unit that allows moisture to be absorbed by the liquid absorbent (absorbent); A recycle unit for releasing moisture in the liquid absorbent; A dehumidification unit pump for transporting the absorbent from the dehumidification unit to the recycle unit; A recirculation unit pump for transporting the absorbent in a reverse direction; And a pump controller for driving the pump under predetermined conditions.

Specifically, the dehumidifying unit includes a case and a structure that is put in a case and provided with a fin or the like. An inlet for supplying the air to be treated is provided in the lower part of the case, and on the other hand, an outlet for discharging the dehumidified air to be treated is provided in the upper part of the case. While the liquid absorbent is poured into the structure, the air to be treated from the inlet is in contact with the liquid absorbent, so that moisture from the air to be treated is absorbed by the liquid absorbent. The dehumidified air to be treated is discharged from the outlet.

The recirculation unit has the same configuration as the dehumidifying unit. While the liquid desiccant having absorbed moisture from the dehumidifying unit is poured into the structure, the air to be recirculated from the inlet comes into contact with the liquid desiccant, the water is removed from the liquid desiccant into the air, and then the humidified air is discharged from the outlet.

Japanese Patent Application Laid-Open No. 2010-54136

In the wet type moisture absorber having the structure of the related art according to Patent Document 1, the temperature of the liquid absorbent in the dehumidifying unit is raised by the heat generated when the moisture in the air to be treated is absorbed by the liquid absorbent. Therefore, in this case, the saturated vapor pressure of the liquid absorbent increases, so that the absorption of moisture into the liquid absorbent is suppressed. Whereby the humidity-control efficiency can be reduced.

Further, when the liquid absorbent having the absorbed moisture is poured into the structure, the temperature of the liquid absorbent in the recirculating unit is lowered, and the movement of moisture from the liquid absorbent to the air to be recycled is suppressed. Whereby the humidity-control efficiency can be reduced.

It is an object of the present invention to provide a method and regulator for regulating the temperature and humidity-controlling efficiency during humidity control.

In order to attain the above object, the present invention provides a method for controlling gas humidity, comprising the steps of: providing a gas-liquid contact having a heat exchange pipe with an inlet for supplying a gas to be treated and an outlet for discharging the processed gas; A first medium provided in the case and acting as a liquid desiccant flows onto the gas-liquid contact portion, and a second medium for controlling the temperature passes through the heat exchange pipe. In this state, the gas to be treated is fed from the inlet into the gas-liquid contact case, and gas-liquid contact is made by the first medium on the gas-liquid contact portion so that moisture is absorbed from the gas to be processed into the first medium, The gas is discharged from the outlet.

Thus, the gas to be treated and the first medium make gas-liquid contact on the gas-liquid contact portion, and the moisture in the gas to be treated is absorbed into the first medium, which acts as a liquid absorbent. At this time, the second medium passes through the heat exchange pipe constituting the gas-liquid contact portion to regulate the temperature of the first medium on the gas-liquid contact portion. Thereby promoting dehumidification or humidification and increasing the humidity-control efficiency.

According to the gas humidity control method according to the present invention, the temperature can be adjusted during the humidity control, whereby the humidity-control efficiency can be improved.

1 is an explanatory view schematically showing an air humidity controller including a dehumidifier and a humidifier according to one embodiment.
Fig. 2 (a) is a front view showing a gas-liquid contact structure on a gas-liquid contact part for a dehumidifier or a humidifier, and Fig. 2 (b) is an explanatory view schematically showing a gas-
Fig. 3 (a) is a perspective view showing a gas-liquid contact structure in a dehumidifier or humidifier, and Fig. 3 (b) is a perspective view showing a gas-liquid contact structure on the gas-
4 is a graph showing the relationship between the flow rate and the absolute humidity of the first medium in the embodiment or the comparative example.
In Fig. 4, the x-axis represents the flow rate (unit: kg / m ² · s) of the first medium. 4, the y-axis represents the absolute humidity (unit " g / kg ") of the first medium.
The meaning of the points in Fig. 4 represents the results obtained for the solutions of the respective examples as follows:
Example 1:?: Example 2:?; Example 3: ◇;
Example 4:?; Example 5: x; Example 6: *;
Example 7: +; Comparative Example 1: ○.
5 is a graph showing the relationship between the viscosity of the first medium and the saturated vapor pressure in Examples and Comparative Examples.
In Fig. 5, the x-axis represents the viscosity (unit " mPa · s ") of the first medium. In Fig. 5, the y-axis represents the saturated vapor pressure (unit " kPa ") of the first medium.
In Figure 5 the meanings of the points represent the results obtained for the solutions of the respective examples as follows:
Example 1:?: Example 2:?; Example 3: ◇;
Example 4:?; Example 5: x; Example 6: *;
Example 7: +; Comparative Example 1: ○.
6 is a graph showing the relationship between the flow rate and the absolute humidity of the first medium in the embodiment or the comparative example.
In FIG. 6, the x-axis represents the flow rate (unit: kg / m ² · s) of the first medium. In Fig. 6, the y-axis represents the absolute humidity (unit " g / kg ") of the first medium.
The meaning of the points in Fig. 6 represents the results obtained for the solutions of the respective examples as follows:
Examples 1 to 4 (average value): ???; Comparative Example 1: ○.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 is a schematic diagram showing a gas humidity controller 10 according to the present embodiment. The regulator (10) includes a dehumidifier (11) and a humidifier (12) connected to each other. The dehumidifier 11 and the humidifier 12 have the same basic structure. The dehumidifier 11 will first be discussed below.

An inlet 14 for supplying air as a gas to be treated is formed on the side wall 13a of the gas-liquid contact case 13 constituting the gas humidity controller 10, An outlet 15 for discharging the treated air is formed on the upper wall 13b of the gas-liquid contact case 13.

As shown in Figures 2 (a) and 2 (b), the gas-liquid contact case 13 comprises a serpentine heat exchange pipe 17 having a fin 16 provided on the surface of the heat exchange pipe 17 . The heat exchange pipe 17 constitutes a dehumidifying unit which functions as the gas-liquid contact portion 18. [ The heat exchange pipe 17 and the fins 16 are made of a metal such as aluminum, stainless steel or an alloy and can improve the heat exchange function.

As shown in Fig. 3 (a), for example, the heat exchange pipe 17 includes a meandering pipe 19 arranged in five rows in parallel horizontally, and the pipe 19 meanders in regular intervals Lt; / RTI > As shown in Fig. 3 (b), the gas-liquid contacts 18 for gas-liquid contact in the related art have paper contact members 51 arranged at regular intervals. The gas-liquid contact portion 18 is configured such that the absorbent flows along the surface of the contact member 51.

As shown in Fig. 1, a spray pipe 21 having a plurality of outlets 20 at the bottom of the spray pipe 21 is disposed on the heat exchange pipe 17. A receiving pan (23) for receiving the first medium (22) is disposed below the heat exchange pipe (17). A mixed solution of a solution mainly composed of an ionic liquid and water serving as a first medium 22 is sprayed from the discharge port 20 of the spray pipe 21 to the fin 16 and the heat exchange pipe 17, The medium 22 accumulates and stays on the surface of the heat exchange pipe, and the excess first medium 22 is collected in the receiving pan 23.

Moreover, the flow meter 32 and the thermometer 33 are connected to the inlet of the heat exchange pipe 17 while the thermometer 33 is connected to the outlet of the heat exchange pipe 17. This configuration allows measurement of the flow rate and temperature of the second medium 24.

The first medium 22 injected from the spray pipe 21 preferably has a flow rate of 0.5 to 10 kg / m ² .s. When the flow rate of the first medium 22 is lower than 0.5 kg / m ² · s, only a small amount of moisture is absorbed from the air into the first medium 22, which adversely causes a bad dehumidification function. When the flow rate of the first medium 22 is higher than 10 kg / m ² · s, the flow rate is too high, and moisture in the air is hardly absorbed any more. Therefore, improvement of the dehumidifying function is not expected and the first medium 22 can be wasted.

In the dehumidifier 11, the air supplied from the inlet 14 is contacted with the first medium 22 on the surface of the fin 16 and the heat exchange pipe 17, and the air flows through the first medium 22 And moisture in the air is absorbed by the ionic liquid in the first medium 22, and then the dehumidified air is discharged from the outlet 15. [

A solution mainly composed of an ionic liquid is preferably used as a liquid absorbent. A preferably used ionic liquid having a high water absorption and not corrosive to metals is represented by the formula C ⁺ A ^- , wherein C ⁺ is a 1,3-dialkylimidazolium cation and A ^- is Acid anion. As the alkyl group, an alkyl group containing from 1 to 4 carbon atoms is preferable, and a methyl group or an ethyl group is more preferable. A preferred acid anion is a sulfonate anion, a phosphate anion, or a carboxylate anion.

The 1,3-dialkylimidazolium cation is represented by the following formula:

[Chemical Formula 1]

Wherein R ¹ and R ² are alkyl groups containing from 1 to 4 carbon atoms.

Specifically, the ionic liquid 1,3-dimethyl-imidazolium acetate (anions are CH ₃ COO ^- Im), 1,3-dimethyl-imidazolium methyl sulfonate (anion is SO ₃ H ^- Im), 1 Ethyl-3-methylimidazolium diethyl phosphate [the anion is (C ₂ H ₅ ) ₂ PO ₃ ^- ], 1,3-dimethylimidazolium propionate (the anion is C ₂ H ₅ COO ^- ) Is selected. Most preferably, the ionic liquid is 1-ethyl-3-methyl imidazolium diethyl phosphate [the anion is (C ₂ H ₅ ) ₂ PO ₃ ^- ]. The ionic liquid is 1,3-dimethyl-imidazolium acetate (anions are CH ₃ COO ^- Im), 1,3-dimethyl-imidazolium methyl sulfonate (anion is SO ₃ H ^- Im), 1-ethyl-3- Methyl imidazolium diethyl phosphate [the anion is (C ₂ H ₅ ) ₂ PO ₃ ^- ], and 1,3-dimethylimidazolium propionate (the anion is C ₂ H ₅ COO ^- ) , It is preferred that the humidification is carried out at 40 to 90 DEG C, particularly 50 to 80 DEG C, even more preferably 45 to 70 DEG C, even more preferably 50 to 60 DEG C, most preferably 55 DEG C .

Solutions consisting predominantly of ionic liquids contain mediums such as water and other components. The amount of the ionic liquid contained in the solution is preferably 60 to 99, preferably 60 to 90, or alternatively 70 to 99 mass%. Unless otherwise stated, " mass% " refers to the percentage of a particular material (e.g., ionic liquid) relative to the weight of the complete solution.

The ionic liquid satisfactorily functions as a liquid desiccant having an appropriate viscosity, so that the first medium 22 is mainly used as a mixed solution of a solution composed of an ionic liquid and water. The ionic liquid in the first medium 22 preferably has a concentration of 60 to 90, preferably 70 to 80 mass%. When the concentration of the ionic liquid drops to less than 60 mass%, the concentration of the ionic liquid in the mixed solution is extremely low, so that the water absorption of the ionic liquid is adversely reduced. When the concentration of the ionic liquid is more than 90% by mass, the viscosity of the mixed solution excessively increases and the contact between the air and the ionic liquid is deteriorated to lower the water absorption.

When the concentration of the ionic liquid is 80 mass%, the first medium 22 preferably has a low saturated vapor pressure at 35 占 폚. For example, a saturated vapor pressure of 1.9 kPa or less is preferred. However, an ionic liquid having a low saturated vapor pressure tends to become unstable, and therefore, it is preferable to selectively use an ionic liquid type. When the saturated vapor pressure of the first medium 22 exceeds 1.9 kPa, the water absorption degree is adversely reduced due to the vapor-liquid equilibrium.

The first medium 22 preferably has a viscosity of 13 to 21 mPa · s. When the viscosity of the first medium 22 is less than 13 mPa.s, the first medium 22 has a high saturation vapor pressure and the water absorption is adversely reduced. When the viscosity of the first medium 22 is more than 21 mPa · s, the fluidity of the first medium 22 is reduced and the gas-liquid contact between the air and the first medium 22 is lowered, .

In the heat exchange pipe 17 the second medium 24 flows and exchanges heat (primarily by cooling) with the first medium 22 on the surface of the heat exchange pipe 17 and the fins 16 . As a result, the temperature of the first medium (22) is regulated and the degree of water absorption is regulated. The second medium 24 may be water, hydrofluorocarbon (HFC), or hydrofluoroolefin (HFO). Water is most preferable in view of heat-exchange ability and ease of handling.

The temperature of the second medium 24 is preferably equal to or lower than the temperature of the first medium 22. At this time, the degree of water absorption of the first medium 22 increases on the gas-liquid contact portion 18, thereby improving the dehumidification efficiency.

The container 25 is placed under the receiving pan 23. The first medium (22) collected in the receiving pan (23) is stored and accumulated in the container (25). One end of the first connecting pipe 26 is connected to the bottom of the container 25.

The humidifier 12 will be discussed below. The basic structure of the humidifier 12 is the same as that of the dehumidifier 11. Therefore, the same parts are denoted by the same reference numerals, and a description thereof will be omitted.

The first connecting pipe 26 connected to the container 25 of the dehumidifier 11 is connected to the humidifier 12 through the heat exchanger 27 provided between the dehumidifier 11 and the humidifier 12 via the valve 31 And is connected to the spray pipe 21. The heat exchange pipe 17 in the humidifier 12 constitutes a humidifying unit acting as a gas-liquid contact portion 18. [ One end of the second connecting pipe 28 is connected to the bottom of the container 25 in the humidifier 12. The second connecting pipe 28 is connected to the spraying pipe 21 of the dehumidifier 11 through the heat exchanger 27 via the valve 31. Furthermore, the flow meter 32 and the thermometer 33 are connected to the first connecting pipe 26 and the second connecting pipe 28 to measure the flow rate and the temperature of the first medium 22.

The temperature of the second medium 24 is preferably equal to or higher than the temperature of the first medium 22. At this time, the water discharge from the first medium 22 is promoted on the gas-liquid contact portion 18, thereby improving the humidifying efficiency.

In the humidifier 12, the air supplied from the inlet 14 is in contact with the droplets of the first medium 22 and the flowing first medium 22 on the surface of the heat exchange pipe 17, and the first medium 22 ) Is discharged into the air, and then the humidified air is discharged from the outlet (15).

The effects of the air humidity controller 10 and the adjusting method according to the present embodiment will be described below.

1, the first medium 22 containing the ionic liquid is discharged from the discharge port 20 of the spray pipe 21 in the dehumidifier 11 to the gas-liquid contact portion 18 And a heat exchange pipe 17, which serves as a heat exchanger. In this state, humid air is blown into the gas-liquid contact portion 18 from the inlet 14 of the gas-liquid contact case 13.

At this time, the air comes into contact with the droplets of the first medium 22 and the first medium 22 deposited on the surface of the heat exchange pipe 17, causing gas-liquid contact. Since the first medium 22 contains an ionic liquid having a high water absorption degree, moisture in the air is absorbed by the ionic liquid on the gas-liquid contact portion 18, and moisture in the air is reduced, do.

In addition, the second medium 24 passes through a heat exchange pipe 17 on the gas-liquid contact portion 18. Whereby heat is exchanged between the second medium 24 and the first medium 22 on the surface of the heat exchange pipe 17. Specifically, the first medium 22 on the surface of the heat exchange pipe 17 is cooled and water absorption from the air to the ionic liquid is promoted. Thereby, the temperature rise caused by the heat generated when moisture is absorbed into the ionic liquid can be suppressed. Thus, the air can be quickly dehumidified at a high dehumidification rate.

The effects of the specifically discussed embodiments will be described below.

(1) In the air humidity control method of this embodiment, the first medium 22 flows onto the heat exchange pipe 17 of the gas-liquid contact portion 18 in the dehumidifier 11; On the other hand, the second medium (24) passes through the heat exchange pipe (17). In this state, air is supplied from the inlet 14 into the gas-liquid contact case 13 and gas-liquid contact is made by the first medium 22 on the gas-liquid contact portion 18, 1 medium (22). Thereafter, the treated air is discharged from the outlet 15.

Thus, the air and the first medium 22 make gas-liquid contact on the gas-liquid contact 18 and the moisture in the air is absorbed in the first medium 22, which acts as a liquid desiccant. In this case, the second medium 24 passes through the heat exchange pipe 17 constituting the gas-liquid contact portion 18, so that the temperature of the first medium 22 is regulated on the gas- So that dehumidification can be promoted.

In the humidifier 12, the first medium 22 of the dehumidifier 11 is supplied from the first connecting pipe 26 to the spray pipe 21, and then to the gas-liquid contact portion 18. At this time, the air supplied into the gas-liquid contact case 13 makes gas-liquid contact with the first medium 22, and then moisture in the first medium 22 is released into the air. Also in this case the second medium 24 passes through the heat exchange pipe 17 and therefore the temperature of the first medium 22 can be adjusted on the gas-liquid interface 18, .

This enables efficient dehumidification of indoor air in summer and efficient humidification of indoor air in winter. Thus, the air humidity control method of this embodiment can adjust the temperature during humidity control, thus improving the humidity-control efficiency.

(2) The first medium 22 is a mixed solution of a solution and water mainly composed of an ionic liquid. Thus, the viscosity of the ionic liquid acting as a liquid absorbent can be controlled to improve gas-liquid contact. Thus effectively influencing the water absorption of the ionic liquid, thus improving the humidity-control efficiency.

(3) The ionic liquid is represented by the formula C ⁺ A ^- , wherein C ⁺ is a 1,3-dialkylimidazolium cation and A ^- is an acid anion. In this way, ionization is facilitated through proper design selection of ion pairs. Thus, it is possible to improve water absorption of the first medium 22 and to prevent corrosion of the metal.

(4) The alkyl group of the 1,3-dialkylimidazolium cation is preferably a methyl group or an ethyl group. The acid anion is a carboxylate anion, a sulfonate anion, or a phosphate anion. These ionic liquids have a particularly high water absorption and thus contribute to the improvement of the humidity-control efficiency.

(5) The ionic liquid in the first medium 22 preferably has a concentration of 60 to 90 mass%, preferably 70 to 80 mass%. In this case, the viscosity of the ionic liquid can be set in an appropriate range, and thus can appropriately affect the water absorption based on the ionic liquid.

(6) When the ionic liquid has a concentration of 80% by mass and preferably 20% by mass water, the first medium 22 has a pH of 1.9 kPa or less, preferably 1.8 kPa or less at 35 캜, A saturated vapor pressure of 1.2 kPa or less, even more preferably 1.0 kPa or less, and a viscosity of 13 to 21, preferably 14 to 16 mPa · s. Thus, the first medium 22 has a suitable saturation vapor pressure and a suitable viscosity on the gas-liquid interface 18, thus effectively influencing the water absorption of the ionic liquid.

(7) The first medium 22 has a flow rate of 0.5 to 3 kg / m ² · s, preferably 0.5 to 1.0 kg / m ² · s. Thus, the contact efficiency between the first medium 22 and the air on the gas-liquid contact portion 18 can be improved, whereby high humidity-control efficiency can be obtained.

(8) In a regulator (10) used for air humidity regulation, a heat exchange pipe (17) serving as a gas-liquid contact (18) has an inlet (14) for supplying air and an outlet Liquid contact case 13 including an outlet 15 for the gas-liquid contact case 13. A spraying pipe 21 for spraying the first medium 22 to the heat exchange pipe 17 is provided on the heat exchange pipe 17 and the second medium 24 is passed through the heat exchange pipe 17.

Thus, on the gas-liquid contacting portion 18, a gas-liquid contact is made between air and the first medium 22. At this time, the second medium 24 adjusts the temperature of the first medium 22, thereby improving the humidity-controlling efficiency.

(9) The regulator (10) includes a pair of dehumidifiers (11) and a humidifier (12). A first connecting pipe 26 for guiding the first medium 22 collected in the container 25 of the dehumidifier 11 to the spraying pipe 21 of the humidifier 12 is provided. A second connecting pipe 28 for leading the first medium 22 collected in the container 25 of the humidifier 12 to the spraying pipe 21 of the dehumidifier 11 is provided.

Thus, the dehumidifying efficiency in the dehumidifier 11 and the humidifying efficiency in the humidifier 12 can be improved at the same time, so that the energy efficiency in the dehumidifier 11 and the humidifier 12 can be increased.

(10) Heat exchange pipe 17 and fins 16 are made of a metal, preferably aluminum, stainless steel or an alloy, even more preferably aluminum or stainless steel, with aluminum being most preferred. Thus, the heat is efficiently exchanged on the gas-liquid contact portion 18, thereby improving water absorption.

[Example]

Embodiments will be described in more detail below based on examples and comparative examples.

The values of the parameters referred to herein can be measured and reproduced by each of the following methods:

&Quot; Absolute humidity " refers to the total mass (in g) of water vapor per given mass of dry air (in kg). This can be measured by a method known to a person skilled in the art, for example ISO / TR 18931: 2001 (en).

"Saturated vapor pressure" was determined by the method described in OECD Guidelines for the Testing of Chemicals (1981): Test No. 104, items 14-19 "Static Method", adopted March 23, 2006.

The " flow rate " of the solution was determined using a Coriolis flow meter known to the ordinarily skilled artisan.

As used herein, " viscosity " refers to dynamic viscosity. Measurements of dynamic viscosity were performed by DIN EN ISO 3104 (" multirange capillary ") at the indicated temperature (e.g. 35 ° C). All viscosity values given herein are those obtained when such a method is used. Density measurements were performed using DIN 51757, Step 4 (" Biegeschwinger-Verf. " = " Bending vibrator method").

(Examples 1 to 7 and Comparative Example 1)

In Examples 1 to 7, the air humidity control method was tested using the air humidity controller 10 of Fig. 1 under the following conditions:

[First medium (22)]

Example 1: A mixed solution of 80 mass% 1,3-dimethylimidazolium acetate and 20 mass% water, a saturated vapor pressure of 1.0 kPa at 35 占 폚, and a viscosity of 14 mPa 占 퐏 at 35 占

Example 2: A mixed solution of 80 mass% 1,3-dimethylimidazolium methylsulfonate and 20 mass% water, a saturated vapor pressure of 1.9 kPa at 35 占 폚, and a viscosity of 13 mPa 占 퐏 at 35 占 폚

Example 3: A mixed solution of 80 mass% of 1-ethyl-3-methylimidazolium diethyl phosphate and 20 mass% water, a saturated vapor pressure of 1.8 kPa at 35 deg. C, and a viscosity of 21 mPa

Example 4: A mixed solution of 80 mass% 1,3-dimethylimidazolium propionate and 20 mass% water, a saturated vapor pressure of 1.2 kPa at 35 占 폚, and a viscosity of 16 mPa 占 퐏 at 35 占

Example 5: A mixed solution of 80 mass% 1-ethyl-3-methylimidazolium tetrafluoroborate and 20 mass% water, a saturated vapor pressure of 3.5 kPa at 35 deg. C, and a viscosity of 4 mPa

Example 6: A mixed solution of 80 mass% 1-ethyl-3-methylimidazolium nitrate and 20 mass% water, a saturated vapor pressure of 2.8 kPa at 35 占 폚, and a viscosity of 21 mPa 占 퐏 at 35 占 폚

Example 7: A mixed solution of an 80 mass% mixture of 1,3-dimethylimidazolium chloride and lithium chloride (5: 1 by mass ratio) and 20 mass% water, a saturated vapor pressure of 1.9 kPa at 35 占 폚, and a pressure of 52 mPa · S viscosity

Comparative Example 1: Lithium chloride (33 mass% aqueous solution at 35 캜) as an absorbent, a saturated vapor pressure of 1.8 kPa at 35 캜, and a viscosity of 4 mPa 35 at 35 캜

[Dehumidifier (11)]

Target air as a gas: temperature of 34 ℃, and at an absolute humidity, and 216 m a flow rate of ³ / h [Fig. 3 (a) of 19.5 g / kg, L = 0.1 m, H = 0.4 m, 1.5 m / s Was determined and therefore 0.1 x 0.4 x 1.5 x 3600 = 216 m ³ / h was obtained.

First medium (22): a temperature of 17 캜

Second medium (24): a temperature of 17 캜, a flow rate of 6 L / min

[Humidifier (12)]

Air as the gas to be treated: a temperature of 34 캜, an absolute humidity of 19.5 g / kg, and a flow rate of 216 m ³ / h (as in the case of the dehumidifier 11).

First medium (22): temperature of 50 캜

Second medium (24): a temperature of 50 캜 and a flow rate of 2.5 L / min

The flow rate of the first medium 22 was varied and the absolute humidity was measured in the air acting as the treated gas. Figure 4 shows the measurement results.

In Comparative Example 1, the air humidity control method was tested using a plate heat exchanger and a gas-liquid contactor according to the related art. Figure 4 shows the test results.

In Fig. According to the results of 4, Examples 1 to 4, if the first medium 22 having a low flow rate of 0.5 to 3 kg / m ² · s flow rate, in particular 0.5 to 1.0 kg / m ² · s of , The absolute humidity of the treated air was reduced below the target humidity, i.e., below 13 g / kg. 3 (a), the cross-sectional area of the first medium 22 was 0.02 m ² , because L = 0.1 m and W = 0.2 m. The flow rate was calculated by dividing the flow rate (kg / s) of the first medium 22 by the cross-sectional area of the passage of the first medium 22.

In Examples 5 to 7, when the first medium 22 had a flow rate of 0.5 to 3 kg / m ² · s, the absolute humidity decreased to 13 to 15 g / kg.

In Comparative Example 1, when the absorbent had a low flow rate of 2 kg / m ² s or less, the treated air had a high absolute humidity of 14 to 18 g / kg and the absolute humidity decreased to 13 g / kg or less Did not do it. This is because the paper contact member 51 acting as the gas-liquid contact portion 18 did not suppress the temperature rise and interfered with the heat exchange. Furthermore, the desiccant of Comparative Example 1 was highly corrosive to metals, and thus the metallic pin 16 or the metallic heat exchange pipe 17 could not be used.

[Relationship between Viscosity of First Medium and Saturated Vapor Pressure]

The viscosity and saturation vapor pressure of the first medium (22) or absorbent used in Examples 1 to 7 and Comparative Example 1 were measured according to the method mentioned above. Figure 5 shows the measurement results.

As shown in FIG. 5, the first medium 22 of Examples 1 to 4 had a low saturation vapor pressure and a relatively high viscosity. The first medium 22 of Examples 5-7 had a relatively high saturation vapor pressure and a low or high viscosity. The absorbent of Comparative Example 1 had a low saturation vapor pressure and a low viscosity.

[Test for Concentration of Ionic Liquid in First Medium (22)] [

The air humidity control method was tested as in Examples 1 to 4, while the concentration of the ionic liquid in the first medium 22 used in Examples 1 to 4 was 50 mass% to 95 mass% in 5 mass% %, And the first medium 22 had a flow rate of 2 kg / m ² · s. Table 1 shows the test results, where good (denoted as " O ") indicates absolute humidity below 13 g / kg, bad (denoted as " x ") indicates absolute humidity above 13 g / kg, (Denoted by " - ") represents an untested state of high viscosity.

<Table 1>

As shown in the test results of Table 1, the ionic liquid in the first medium 22 preferably has a concentration of 60 to 90 mass%.

[Humidification test on the humidifier 12]

As in the dehumidification test on the dehumidifier 11 in Examples 1 to 4, the humidification test was performed under the condition of the humidifier 12. Furthermore, the relationship between the flow rate of the first medium 22 and the absolute humidity was determined. The test results are shown in Fig.

Fig. 6 shows the average values of the absolute humidity in Examples 1 to 4. Fig. In Comparative Example 1, a humidification test was similarly performed. The test results are shown in Fig.

6, the absolute humidity was higher in Examples 1 to 4 than in Comparative Example 1, when the first medium 22 had a low flow rate in the humidification test.

[Influence of temperature during humidification by the humidifier 12]

In Examples 1 to 4, a humidification test was performed, while the first medium 22 had a flow rate of 2 kg / m ² s and the temperature of the first medium 22 was changed from 30 캜 to 90 캜 . Table 2 shows the test results, where good (denoted as "O") represents an absolute humidity of at least 22 g / kg and fault (denoted by "x") represents an absolute humidity of less than 22 g / kg.

<Table 2>

As shown in Table 2, adequate humidification was achieved at a temperature of 40 to 90 DEG C during humidification.

Embodiments may be modified in specific forms as follows:

The first connecting pipe 26 or the second connecting pipe 28 that allows the first medium 22 to pass therethrough is provided with the temperature control of the first medium 22 through heat exchange with the second medium 24, A heat exchanger for heat exchange with the second medium 24 may be provided.

The outlet 20 of the spray pipe 21 may vary in opening diameter to regulate the size of the droplets of the first medium 22 flowing from the outlet 20.

The container 25 in the gas-liquid contact case 13 can be omitted and the first medium 22 can be collected in the lower part of the gas-liquid contact case 13. [ In this case, one end of the first connecting pipe 26 or the second connecting pipe 28 is connected to the gas-liquid contact case 13.

10 regulator
11 Dehumidifier
12 Humidifier
13 gas-liquid contact case
13a side wall of the gas liquid contact case
13b The upper wall of the gas liquid contact case
14 Inlet
15 outlet
16 pin
17 Heat exchange pipe
18 gas-liquid contact
19 Pipe
20 outlet
21 spray pipe
22 First medium
23 receiving fans
24 second medium
25 containers
26 First connection pipe
27 Heat exchanger
28 second connecting pipe
31 valve
32 Flowmeter
33 Thermometers
51 paper contact member

Claims (12)

Liquid contact case 13 from the inlet 14 of the gas-liquid contact case 13 having the inlet 14 for supplying the gas to be treated and the outlet 15 for discharging the processed gas into the gas- Liquid contact portion 18 including the heat exchange pipe 17 in the gas-liquid contact case 13 and the first medium 22 serving as the liquid absorbent on the one hand are arranged on the gas- Passing a second medium (24) for temperature regulation through a heat exchange pipe (17);
Absorbing moisture from the gas to be treated into the first medium 22 and making gas-liquid contact with the first medium 22 on the other hand on the gas-liquid contact portion 18;
And discharging the treated gas from the outlet 15
/ RTI &gt; The method according to claim 1, wherein the first medium is a mixed solution of a solution mainly composed of an ionic liquid and water. The method of claim 2, wherein the ionic liquid is represented by the formula C ⁺ A ^- , wherein C ⁺ is a 1,3-dialkylimidazolium cation and A ^- is a anion. 4. The method of claim 3, wherein the alkyl group of the 1,3-dialkylimidazolium cation is a methyl group or an ethyl group, and the acid anion is a carboxylate anion, a sulfonate anion, or a phosphate anion. 5. A method according to any one of claims 2 to 4, wherein the ionic liquid in the first medium (22) has a concentration of 60 to 90 mass%. 6. A process according to any one of claims 2 to 5, wherein the ionic liquid has a concentration of 80% by mass, the first medium (22) has a saturated vapor pressure at 35 DEG C of 1.9 kPa or less and 13 to 21 mPa.s Lt; RTI ID = 0.0 &gt; a &lt; / RTI &gt; viscosity. 7. The method according to any one of claims 1 to 6, wherein the first medium (22) has a flow rate of 0.5 to 3 kg / m &lt; ² &gt; A heat exchange pipe 17 and a fin 16 are disposed in the gas-liquid contact case 13 including an inlet 14 for supplying the gas to be treated and an outlet 15 for discharging the processed gas. A gas humidity controller (10) arranged in a serpentine arrangement as a liquid contact portion (18), said regulator (10) being arranged above a heat exchange pipe (17) for spraying a first medium (22) Wherein the second medium (24) comprises a dispensing pipe (21) provided therethrough, the second medium (24) passing through a heat exchange pipe (17). 9. The method of claim 8,
A pair of dehumidifiers 11 and a humidifier 12;
A first connecting pipe 26 for passing the dehumidified first medium 22 between the gas-liquid contact case 13 of the dehumidifier 11 and the spray pipe 21 of the humidifier 12; And
A second connecting pipe 28 for passing the humidified first medium 22 between the gas-liquid contact case 13 of the humidifier 12 and the spraying pipe 21 of the dehumidifier 11,
(10). &Lt; / RTI &gt; 10. A gas humidity controller (10) according to claim 8 or 9, wherein the heat exchange pipe (17) and the pin (16) are made of metal. 11. The gas humidity controller (10) according to claim 10, wherein the heat exchange pipe (17) and the pin (16) are made of aluminum or stainless steel. 12. A gas humidity controller (10) according to any one of claims 8 to 11, for use in a gas humidity control method according to any one of claims 1 to 7.

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