TW201923288A - Gas humidity regulating method and regulator - Google Patents

Abstract

To provide a gas humidity regulating method and a regulator that can regulate a temperature during humidity control and improve humidity-control efficiency. In an air humidity regulating method for gas subjected to treatment, a first medium 22 is caused to flow onto a heat exchanging pipe 17 of a gas-liquid contact part 18 in a dehumidifier 11; meanwhile, a second medium 24 is passed through the heat exchanging pipe 17. In this state, air is fed into a gas-liquid contact case 13 from an inlet port 14 and gas-liquid contact is made by the first medium 22 on the gas-liquid contact part 18 so as to absorb water content from the air into the first medium 22. The first medium 22 contains an ionic liquid having high absorbency. The temperature of the first medium 22 is regulated by the second medium 24. After that, treated air is discharged from an outlet port 15 of the gas-liquid contact case 13.

Description

Gas humidity adjustment method and regulator

The invention relates to a gas humidity regulating method and a regulator for controlling moisture in the air, that is, for example, in hospitals, nursing homes, offices, sports facilities, food factories, and pharmaceutical factories.

This regulator is called a liquid-desiccant air conditioner, in which a liquid desiccant (desiccant) is used. The liquid desiccant air conditioner is combined with a heat pump to separate latent heat and sensible heat, and an energy-saving air-conditioning system can be constructed.

For example, Patent Literature 1 discloses a wet desiccant apparatus. Wet dehumidifier equipment includes a dehumidifier unit that allows moisture to be absorbed into a liquid dehumidifier (absorbent); a recovery unit that releases moisture from the liquid dehumidifier; a dehumidifier unit pump that transports the absorbent from the dehumidifier to the recovery unit; A recovery unit pump that transports the absorbent; and a pump controller that drives the pump under predetermined conditions.

Specifically, the dehumidifying unit includes a casing and a structure provided with fins or the like in the casing. An inlet for feeding the air to be treated is provided at the lower part of the casing, and an outlet for exhausting the air to be dehumidified is provided at the upper part of the casing. When a liquid desiccant is poured into the structure, the air to be treated from the inlet is brought into contact with the liquid desiccant to absorb moisture from the air to be treated into the liquid desiccant. The dehumidified air to be treated is discharged from the outlet.

The recovery unit has the same configuration as the dehumidification unit. When a liquid desiccant having absorbed moisture from the dehumidifying unit is poured into the structure, the air to be recovered from the inlet is brought into contact with the liquid desiccant to remove moisture from the liquid desiccant into the air, and The humidified air is discharged from the outlet.
[List of cited files]
[Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2010-54136

[technical problem]

In a wet type dehumidifier device having a related technical field configuration according to Patent Document 1, the liquid dehumidifier in the dehumidifying unit increases in temperature due to heat generated when moisture in the air to be treated is absorbed into the liquid desiccant . Therefore, the saturated vapor pressure of the liquid desiccant is increased in this case, thereby suppressing the absorption of moisture into the liquid desiccant. This may reduce the efficiency of humidity control.

In addition, when a liquid desiccant having absorbed moisture is poured into the structure, the temperature of the liquid desiccant is lowered in the recirculation unit to suppress the movement of moisture from the liquid desiccant into the air to be recycled. This may reduce the efficiency of humidity control.

It is an object of the present invention to provide a gas humidity adjustment method and a regulator which can adjust the temperature and improve the humidity control efficiency during the humidity control.

[Solution of the problem]

In order to achieve the object, in the gas humidity adjustment method of the present invention, a gas-liquid contact member having a heat exchange tube is provided in a gas-liquid contact having an inlet for feeding a gas to be treated and an outlet for discharging a processed gas In the casing, a first medium as a liquid dehumidifying agent is caused to flow onto the gas-liquid contact member, and a second medium for adjusting temperature is passed through the heat exchange tube. In this state, the gas to be treated is fed into the gas-liquid contact housing from the inlet, and the gas-liquid contact is made by the first medium on the gas-liquid contact member to absorb moisture from the gas to be treated to the first medium. Medium, and then the treated gas is discharged from the outlet.

Therefore, the gas to be treated makes gas-liquid contact with the first medium on the gas-liquid contact member and the moisture in the gas to be treated is absorbed into the first medium as a liquid dehumidifier. At this moment, the second medium passes through the heat exchange tube constituting the gas-liquid contact member to adjust the temperature of the first medium on the gas-liquid contact member. This can speed up dehumidification or humidification to improve the efficiency of humidity control.

[Beneficial effects of the invention]

According to the gas humidity adjustment method according to the present invention, the temperature can be adjusted during the humidity control, thereby improving the humidity control efficiency.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic diagram showing a gas humidity regulator 10 according to the present embodiment. The regulator 10 includes a dehumidifier 11 and a humidifier 12 connected to each other. The dehumidifier 11 has the same basic configuration as the humidifier 12. The dehumidifier 11 will be discussed first below.

As shown in FIG. 1, an inlet 14 for feeding air as a gas to be treated is formed on a side wall 13 a of a gas-liquid contact case 13 constituting a gas humidity regulator 10, and an outlet for treating the air The outlet 15 is formed on the upper wall 13 b of the gas-liquid contact case 13.

As shown in FIGS. 2 (a) and 2 (b), the gas-liquid contact case 13 includes a meandering heat exchange tube 17 having a fin 16 provided on the surface of the heat exchange tube 17. The heat exchange tube 17 constitutes a dehumidifying unit as a gas-liquid contact member 18. The heat exchange tubes 17 and the fins 16 are made of metal (such as aluminum, stainless steel, or alloy) and can improve the heat exchange function.

As shown in FIG. 3 (a), for example, the heat exchanging tubes 17 include winding tubes 19 arranged horizontally and in parallel in five rows, the tubes 19 extending vertically to meander at regular intervals. As shown in FIG. 3 (b), the gas-liquid contact member 18 for gas-liquid contact in the related art has paper contact members 51 provided at regular intervals. The gas-liquid contact member 18 is configured so that the absorbent flows along the surface of the contact element 51.

As shown in FIG. 1, a sprinkler pipe 21 having a plurality of discharge ports 20 at the bottom of the sprinkler pipe 21 is disposed above the heat exchange pipe 17. The receiving pot 23 for receiving the first medium 22 is disposed below the heat exchange tube 17. A mixed solution of water as the first medium 22 and a solution mainly composed of an ionic liquid is sprayed from the discharge port 20 of the sprinkler pipe 21 to the fins 16 and the heat exchange pipe 17 so that the first medium 22 is deposited and stays in the heat exchange pipe The excess of the first medium 22 on the surface is collected in the receiving pot 23.

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

The first medium 22 sprayed from the sprinkler pipe 21 preferably has a flow rate of 0.5 to 10 kg / m ² × s. If the flow rate of the first medium 22 is less 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 results in a poor dehumidification function. If the flow rate of the first medium 22 is higher than 10 kg / m ² × s, the flow rate is too large and it is difficult to absorb water in the air again. Therefore, an improvement in the dehumidifying function is not expected, and the first medium 22 may be wasted.

In the dehumidifier 11, the air fed from the inlet 14 will contact the fins 16 and the first medium 22 on the surface of the heat exchange tube 17, the air will contact the flowing first medium 22, and the moisture in the air will be The ionic liquid in the medium 22 is absorbed, 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 desiccant. The preferred use of a high water absorbing and non-corrosive to metals ionic liquid of formula C ⁺ A ^-, where C ⁺ is 1,3-dialkyl imidazolium cation, and A ^- is an acid anion. As the alkyl group, an alkyl group having 1 to 4 carbon atoms is preferred, and a methyl group or an ethyl group is more preferred. Preferred acid anions are sulfonate, phosphate or carboxylate anions.

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

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

Specifically, the ionic liquid is selected from 1,3-dimethyl-imidazolium acetate (anion of CH ₃ COO ^-), 1,3- dimethyl-imidazolium methanesulfonate (anion is SO ₃ H ^-), 1‑ethyl-3-methylimidazolium diethyl phosphate [anion is (C ₂ H ₅ ) ₂ PO ₃ ⁻ ], 1,3-dimethylimidazolium propionate (anion is C ₂ H ₅ COO ^- ). Most preferably, the ionic liquid is 1-ethyl-3-methylimidazolium diethyl phosphate [anion is (C ₂ H ₅ ) ₂ PO ₃ ⁻ ]. When the ionic liquid is selected from 1,3-dimethyl-imidazolium acetate (anion of CH ₃ COO ^-), 1,3- dimethyl-imidazolium methanesulfonate (anion is SO ₃ H ^-), 1- ethyl diethyl-3-methyl imidazolium phosphate [anions _{(C 2 H 5) 2 PO} 3 -], 1,3- dimethyl-imidazolium propionate (anion is C ₂ H ₅ COO ^-) when Preferably, humidification is performed at 40 ° C to 90 ° C, especially 50 ° C to 80 ° C, even more preferably 45 ° C to 70 ° C, even more preferably 50 ° C to 60 ° C, and most preferably 55 ° C.

A solution consisting mainly of an ionic liquid contains a medium such as water and other components. The content of the ionic liquid contained in the solution is preferably 60 to 99% by mass, preferably 60 to 90% by mass, or 70 to 99% by mass. Unless otherwise stated, "mass%" gives the percentage of a substance (such as an ionic liquid) relative to the weight of the complete solution.

The ionic liquid satisfactorily functions as a liquid dehumidifier having an appropriate viscosity, and thus the first medium 22 is used as a mixed solution of water and a solution mainly composed of an ionic liquid. The ionic liquid in the first medium 22 preferably has a concentration of 60 to 90% by mass, and more preferably 70 to 80% by mass. If the concentration of the ionic liquid falls below 60% by mass, the concentration of the ionic liquid in the mixed solution is extremely low, so that the water absorption of the ionic liquid is unfavorably reduced. If the concentration of the ionic liquid exceeds 90% by mass, the viscosity of the mixed solution excessively increases, resulting in poor contact between the air and the ionic liquid, thereby reducing water absorption.

When the concentration of the ionic liquid is 80% by mass, the first medium 22 preferably has a low saturated vapor pressure at 35 ° C. For example, the saturated vapor pressure is preferably 1.9 kPa or lower. However, an ionic liquid having a low saturated vapor pressure may become unstable, and thus it is desirable to selectively use various ionic liquids. If the saturated vapor pressure of the first medium 22 exceeds 1.9 kPa, the water absorption is disadvantageously reduced due to vapor-liquid equilibrium.

The first medium 22 preferably has a viscosity of 13 to 21 mPa · s. If the viscosity of the first medium 22 is lower than 13 mPa · s, the first medium 22 has a high saturated vapor pressure, which disadvantageously reduces water absorption. If the viscosity of the first medium 22 is higher than 21 mPa · s, the fluidity of the first medium 22 is reduced and the gas-liquid contact between the degraded air and the first medium 22 is reduced, thereby reducing water absorption.

In the heat exchange tube 17, the second medium 24 flows and performs heat exchange (mainly by cooling) with the heat exchange tube 17 and the first medium 22 on the surface of the fin 16. This adjusts the temperature of the first medium 22 to adjust the water absorption. The second medium 24 may be water, a hydrofluorocarbon (HFC), or a hydrofluoroolefin (HFO). Given the heat exchange capacity and ease of handling, water is the best.

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

The container 25 is placed below the receiving pot 23. The first medium 22 collected in the receiving pot 23 is stored and accumulated in a container 25. One end of the first connection pipe 26 is connected to the bottom of the container 25.

The humidifier 12 will be discussed below. The basic configuration of the humidifier 12 is the same as that of the dehumidifier 11. Therefore, the same components are designated by the same reference symbols and their explanations are omitted.

The first connection pipe 26 connected to the container 25 of the dehumidifier 11 passes through the valve 31 and is connected to the sprinkler pipe 21 of the humidifier 12 via a heat exchanger 27 provided between the dehumidifier 11 and the humidifier. The heat exchange tube 17 in the humidifier 12 constitutes a humidifying unit as a gas-liquid contact member 18. One end of the second connection pipe 28 is connected to the bottom of the container 25 in the humidifier 12. The second connection pipe 28 is a sprinkler pipe 21 connected to the dehumidifier 11 through the valve 31 and through the heat exchanger 27. The flow rate meter 32 and the thermometer 33 are connected to the first connection pipe 26 and the second connection pipe 28 to measure the flow rate and 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 moment, on the gas-liquid contact member 18, the water released from the first medium 22 is increased, thereby improving the humidification efficiency.

In the humidifier 12, the air fed from the inlet 14 comes into contact with the first medium 22 and the droplets of the first medium 22 flowing on the surface of the heat exchange tube 17, and the moisture in the first medium 22 is released to The air, and then the humidified air is discharged from the outlet 15.

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

As shown in FIG. 1, in the dehumidification of humid air, a first medium 22 containing an ionic liquid is sprayed from a discharge port 20 of a sprinkler pipe 21 in a dehumidifier 11 to a fin 16 as a gas-liquid contact member 18 and heat exchange Tube 17. In this state, wet air is blown from the inlet 14 of the gas-liquid contact case 13 to the gas-liquid contact member 18.

At this moment, the air will be in contact with the droplets of the first medium 22 and the first medium 22 deposited on the surface of the heat exchange tube 17, causing gas-liquid contact. Since the first medium 22 contains an ionic liquid with high water absorption, the moisture in the air is absorbed into the ionic liquid on the gas-liquid contact member 18, thereby reducing the moisture in the air and achieving dehumidification.

In addition, the second medium 24 passes through a heat exchange tube 17 on the gas-liquid contact member 18. This will exchange heat between the second medium 24 and the first medium 22 on the surface of the heat exchange tube 17. Specifically, the first medium 22 on the surface of the heat exchange tube 17 is cooled, and the absorption of moisture from the air to the ionic liquid is accelerated. This can also suppress the temperature rise caused by the heat generated by the absorption of moisture into the ionic liquid. Therefore, the air can be quickly dehumidified with a high dehumidification rate.

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

(1) In the air humidity adjustment method of this embodiment, the first medium 22 is caused to flow to the heat exchange tube 17 of the gas-liquid contact member 18 in the dehumidifier 11; meanwhile, the second medium 24 passes through the heat exchange tube 17 . In this state, air is fed into the gas-liquid contact housing 13 from the inlet 14 and is brought into gas-liquid contact by the first medium 22 on the gas-liquid contact member 18 to absorb moisture from the air into the first medium 22. After that, the treated air is discharged from the outlet 15.

Therefore, air makes gas-liquid contact with the first medium 22 on the gas-liquid contact member 18, and moisture in the air is absorbed into the first medium 22 as a liquid desiccant. In this case, the second medium 24 passes through the heat exchange tube 17 constituting the gas-liquid contact member 18, and thus the temperature of the first medium 22 can be adjusted on the gas-liquid contact member 18, thereby accelerating dehumidification.

In the humidifier 12, the first medium 22 of the dehumidifier 11 is fed from the first connection pipe 26 into the sprinkler pipe 21 and then sprayed onto the gas-liquid contact member 18. At this moment, the air fed into the gas-liquid contact housing 13 makes gas-liquid contact with the first medium 22, and then the moisture in the first medium 22 is released into the air. In this case as well, the second medium 24 passes through the heat exchange tube 17 and thus the temperature of the first medium 22 can be adjusted on the gas-liquid contact member 18, thereby accelerating dehumidification.

This can effectively dehumidify indoor air in summer and humidify indoor air effectively in winter. Therefore, the air humidity adjustment method of the present embodiment can adjust the temperature during the humidity control, thereby improving the humidity control efficiency.

(2) The first medium 22 is a mixed solution of water and a solution mainly composed of an ionic liquid. Therefore, the viscosity of the ionic liquid as a liquid dehumidifier can be adjusted to improve gas-liquid contact. This can effectively exert the water absorption of the ionic liquid, thereby improving the humidity control efficiency.

(3) ionic liquid system to the formula C ⁺ A ^-, where C ⁺ is 1,3-dialkyl imidazolium cation, and A ^- is an acid anion. In this way, proper design choices for ion pairs promote ionization. This can improve the water absorption of the first medium 22 and prevent the metal from being corrosive.

(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 are particularly highly absorbent, which helps to improve the efficiency of humidity control.

(5) The ionic liquid in the first medium 22 preferably has a concentration of 60 to 90% by mass, and more preferably 70 to 80% by mass. In this case, the viscosity of the ionic liquid can be set within a suitable range, so that the water absorption based on the ionic liquid can be appropriately exerted.

(6) When the ionic liquid has water with a concentration of 80% by mass and preferably 20% by mass, the first medium 22 has a saturated vapor pressure of 1.9 kPa or lower, preferably 1.8 kPa or lower, and more preferably 1.2 kPa at 35 ° C. Or lower, even better 1.0 kPa or lower, and a viscosity of 13 to 21 mPa × s, preferably 14 to 16 mPa × s. Therefore, the first medium 22 has a proper saturated vapor pressure and a proper viscosity on the gas-liquid contact member 18, so that the water absorption of the ionic liquid is effectively exerted.

(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. This can improve the contact efficiency between the first medium 22 on the gas-liquid contact member 18 and the air, thereby achieving high humidity control efficiency.

(8) In the regulator 10 for an air humidity adjustment method, a heat exchange tube 17 as a gas-liquid contact member 18 is provided in a meandering manner in a gas-liquid contact case 13, which includes An inlet 14 for feeding air and an outlet for discharging treated air. A sprinkler pipe 21 spraying the first medium 22 onto the heat exchange pipe 17 is provided above the heat exchange pipe 17, and the second medium 24 passes through the heat exchange pipe 17.

Therefore, gas-liquid contact is made between the air and the first medium 22 on the gas-liquid contact member 18. At this moment, the second medium 24 adjusts the temperature of the first medium 22, thereby improving the humidity control efficiency.

(9) The regulator 10 includes a pair of a dehumidifier 11 and a humidifier 12. The first connection pipe 26 is equipped with a sprinkler pipe 21 provided to guide the first medium 22 collected in the container 25 of the dehumidifier 11 to the humidifier 12. The second connection pipe 28 is equipped with a sprinkler pipe 21 provided to guide the first medium 22 collected in the container 25 of the humidifier 12 to the dehumidifier 11.

This can improve the dehumidification efficiency in the dehumidifier 11 and the humidification efficiency in the humidifier 12 at the same time, thereby improving the energy efficiency of the dehumidifier 11 and the humidifier 12.

(10) The heat exchange tube 17 and the fins 16 are made of metal, preferably aluminum, stainless steel, or alloy, even more preferably aluminum or stainless steel, and most preferably aluminum. Therefore, heat is efficiently exchanged on the gas-liquid contact member 18, thereby improving water absorption.

[Example]
Hereinafter, embodiments will be described more specifically based on examples and comparative examples.
Measure the parameter values cited in this article and can be reproduced by the following respective methods:
"Absolute humidity" refers to the total mass of water vapor (in g) per given mass of dry air (in kg). It can be measured by methods known to those skilled in the art, such as ISO / TR 18931: 2001 (en).
"Saturated vapor pressure" is measured by the method described in the following: OECD Guidelines for the Testing of Chemicals (1981): Test No. 104, items 14-19 "Static Method", adopted March 23, 2006.
The "flow rate" of a solution is measured using a Coriolis flow meter known to those having ordinary skill in the art.
As used herein, "viscosity" refers to dynamic viscosity. The measurement of the dynamic viscosity is carried out at the indicated temperature (for example at 35 ° C.) by DIN EN ISO 3104 (“multi-range capillary”). All viscosity values given in this specification refer to viscosity values obtained using this method.
The density measurement was performed using DIN 51757, procedure 4 (" Biegeschwinger-Verf. " = "Bend Vibrator Method").

(Examples 1 to 7 and Comparative Example 1)
In Examples 1 to 7, the air humidity regulator 10 in FIG. 1 was used to test the air humidity conditioning method under the following conditions:

[First Medium 22]
Example 1: A mixed solution of 80% by mass of 1,3-dimethylimidazolium acetate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 1.0 kPa, and the viscosity at 35 ° C is 14 mPa × s
Example 2: A mixed solution of 80% by mass of 1,3-dimethylimidazolium mesylate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 1.9 kPa, and the viscosity at 35 ° C is 13 mPa × s
Example 3: A mixed solution of 80% by mass of 1-ethyl-3-methylimidazolium diethyl phosphate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 1.8 kPa, and the viscosity at 35 ° C 21 mPa × s
Example 4: A mixed solution of 80% by mass of 1,3-dimethylimidazolium propionate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 1.2 kPa, and the viscosity at 35 ° C is 16 mPa × s
Example 5: A mixed solution of 80% by mass of 1-ethyl-3-methylimidazolium tetrafluoroborate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 3.5 kPa, and the viscosity at 35 ° C 4 mPa × s
Example 6: A mixed solution of 80% by mass of 1-ethyl-3-methylimidazolium nitrate and 20% by mass of water, the saturated vapor pressure at 35 ° C is 2.8 kPa, and the viscosity at 35 ° C is 21 mPa × s
Example 7: A mixed solution of 80% by mass of 1,3-dimethylimidazolium chloride and lithium chloride (mass ratio 5 to 1) and 20% by mass of water, the saturated vapor pressure at 35 ° C is 1.9 kPa And a viscosity of 52 mPa × s at 35 ° C
Comparative Example 1: Lithium chloride (33 mass% aqueous solution, 35 ° C) as an absorbent, a saturated vapor pressure of 1.8 kPa at 35 ° C, and a viscosity of 4 mPa × s at 35 ° C

[Dehumidifier 11]
Air as the gas to be treated: temperature 34 ° C, absolute humidity 19.5 g / kg, and flow rate 216 m ³ / h [In Fig. 3 (a), L = 0.1m, H = 0.4m, and the flow rate is measured Is 1.5 m / s and therefore 0.1 ´ 0.4 ´ 1.5 ´ 3600 = 216 m ³ / h. ]
First medium 22: temperature 17 ° C
Second medium 24: temperature 17 ° C, flow rate 6 L / min

[Humidifier 12]
Air as the gas to be treated: temperature 34 ° C, absolute humidity 19.5 g / kg, and flow rate 216 m ³ / h (as in the case of dehumidifier 11)
First medium 22: temperature 50 ° C
Second medium 24: temperature 50 ° C, flow 2.5 L / min

The flow rate of the first medium 22 is changed and the absolute humidity is measured in the air as the processed gas. Figure 4 shows the measurement results.

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

According to the results of FIG. 4, in Examples 1 to 4, when the first medium 22 has a flow rate of 0.5 to 3 kg / m ² × s, especially when the flow rate is 0.5 to 1.0 kg / m ² × s, The absolute humidity of the treated air is reduced to a target humidity or lower, ie, 13 g / kg or lower. Since L = 0.1 m and W = 0.2 m are determined in FIG. 3 (a), the cross-sectional area of the channel of the first medium 22 is 0.02 m ² . The flow rate is calculated by dividing the flow velocity (kg / s) of the first medium 22 by the cross-sectional area of the channel of the first medium 22.

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

In Comparative Example 1, the treated air had a high absolute humidity of 14 to 18 g / kg, and when the absorbent had a low flow rate of 2 kg / m ² × s or less, the absolute humidity did not decrease to 13 g / kg or lower. This is because the paper contact element 51 as the gas-liquid contact member 18 does not suppress the temperature rise, and excludes heat exchange. Furthermore, the dehumidifier in Comparative Example 1 is highly corrosive to metals, and therefore metal fins 16 or metal heat exchange tubes 17 cannot be used.

[Relationship between the viscosity of the first medium and the saturated vapor pressure]
The viscosity and the saturated vapor pressure of the first medium 22 or the absorbent used in Examples 1 to 7 and Comparative Example 1 were measured according to the methods described above. Figure 5 shows the measurement results.

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

[For the test of the ionic liquid concentration in the first medium 22]
The air humidity adjustment 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 changed from 50% by mass to 95% by mass with a variable of 5% by mass and the A medium 22 has a flow rate of 2 kg / m ² × s. Table 1 shows the test results, where good (indicated by "○") indicates that the absolute humidity is not higher than 13 g / kg, and bad (indicated by "x") indicates that the absolute humidity is not lower than 13 g / kg, without testing (Indicated by "-") indicates an untested state with high viscosity.

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

[Humidification test for humidifier 12]
As in the dehumidification test for the dehumidifier 11 in Examples 1 to 4, the humidification test was performed under the condition of the humidifier 12. The relationship between the flow rate of the first medium 22 and the absolute humidity was measured. The test results are shown in Fig. 6.

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

As shown in FIG. 6, when the first medium 22 has a low flow rate in the humidification test, the absolute humidity in Examples 1 to 4 is higher than that in Comparative Example 1.

[Effect of temperature on humidification during 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 became from 30 ° C to 90 ° C. Table 2 shows the test results, where good (indicated by "○") indicates that the absolute humidity is not lower than 22 g / kg and bad (indicated by "x") indicates that the absolute humidity is lower than 22 g / kg.

As shown in Table 2, proper humidification was obtained at a temperature of 40 to 90 ° C during humidification.

The implementation scheme can be changed in the following specific forms:
• The first connection pipe 26 or the second connection pipe 28 that allows the first medium 22 to pass may be equipped with a heat exchanger for heat exchange with the second medium 24, and accelerates the passage through the heat exchange with the second medium 24. The temperature of a medium 22 is adjusted.

The discharge opening 20 of the sprinkler pipe 21 can have a change in the diameter of the opening, so as to adjust the droplet size of the first medium 22 flowing out from the discharge opening 20.

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

10‧‧‧ Regulator

11‧‧‧ dehumidifier

12‧‧‧ Humidifier

13‧‧‧ gas-liquid contact case

13a‧‧‧ Gas-liquid contacts the side wall of the casing

13b‧‧‧ gas and liquid contact the upper wall of the casing

14‧‧‧ entrance

15‧‧‧ exit

16‧‧‧ fins

17‧‧‧heat exchange tube

18‧‧‧ gas-liquid contact parts

19‧‧‧ tube

20‧‧‧Export

21‧‧‧Sprinkler

22‧‧‧First Medium

23‧‧‧Receiving pot

24‧‧‧Second Medium

25‧‧‧container

26‧‧‧First connecting pipe

27‧‧‧Heat exchanger

28‧‧‧Second connection pipe

31‧‧‧ Valve

32‧‧‧ flow rate meter

33‧‧‧ thermometer

51‧‧‧paper contact element

[Fig. 1] Fig. 1 is an illustrative explanatory diagram schematically showing an air humidity conditioner including a dehumidifier and a humidifier according to an embodiment.

[Fig. 2] Fig. 2 (a) is a front view showing a gas-liquid contact structure on a gas-liquid contact member of a dehumidifier or a humidifier, and Fig. 2 (b) is an example schematically showing a gas-liquid contact structure Illustrating.

[Fig. 3] Fig. 3 (a) is a perspective view showing a gas-liquid contact structure in a dehumidifier or a humidifier, and Fig. 3 (b) shows a gas-liquid contact structure on a gas-liquid contact member in the related art. Perspective view.

[Fig. 4] Fig. 4 is a graph showing the relationship between the flow rate of the first medium and the absolute humidity in the example or the comparative example.

The x-axis in FIG. 4 shows the flow rate of the first medium (the unit is “kg / m ² ∙ s”). The y-axis in Fig. 4 shows the absolute humidity of the first medium (unit is "g / kg").

The meaning of the dots in FIG. 4 represents the results obtained for the solutions of the following examples:

Example 1: ◎; Example 2: △; Example 3: ◇;

Example 4: □; Example 5: ×; Example 6: *;

Example 7: +; Comparative Example 1: ○.

[Fig. 5] Fig. 5 is a graph showing the relationship between the viscosity of the first medium and the saturated vapor pressure in Examples and Comparative Examples.

The x-axis in FIG. 5 shows the viscosity of the first medium (the unit is “mPa · s”). The y-axis in FIG. 5 shows the saturated vapor pressure (in kPa) of the first medium.

The meaning of the dots in FIG. 5 represents the results obtained for the solutions of the following examples:

Example 1: ◎; Example 2: △; Example 3: ◇;

Example 4: □; Example 5: ×; Example 6: *;

Example 7: +; Comparative Example 1: ○.

6 is a graph showing a relationship between a flow rate of a first medium and an absolute humidity in an example or a comparative example.

The x-axis in FIG. 6 shows the flow rate of the first medium (the unit is “kg / m ² ∙ s”). The y-axis in FIG. 6 shows the absolute humidity of the first medium (the unit is "g / kg").

The meaning of the dots in FIG. 6 represents the results obtained for the solutions of the following examples:

Examples 1 to 4 (average value): ◎; Comparative Example 1: ○.

Claims (12)

A method for adjusting humidity of a gas, comprising: The gas to be treated is fed from the inlet <14> of the gas-liquid contact housing <13> to the gas-liquid contact housing <13>, and the first medium <22> serving as a liquid dehumidifier is set on the gas-liquid contact member <18> The second medium for adjusting the temperature <24> passes through the heat exchange tube <17>, and the gas-liquid contact member <18> includes the heat exchange tube in the gas-liquid contact housing <13> <17>, the gas-liquid contact housing <13> having the inlet <14> for feeding a gas to be treated and an outlet <15> for exhausting the processed gas; Absorbing moisture from the gas to be treated into the first medium <22> while making gas-liquid contact with the first medium <22> on the gas-liquid contact member <18>; and The processed gas is discharged from the outlet <15>. The gas humidity adjusting method according to claim 1, wherein the first medium is a mixed solution of water and a solution mainly composed of an ionic liquid. Item 2 requests the gas humidity conditioning method, wherein the ionic liquid of formula C ⁺ A ^-, where C ⁺ is 1,3-dialkyl imidazolium cation, and A ^- is an acid anion. The gas humidity adjustment method according to claim 3, wherein the alkyl group of the 1,3-dialkylimidazolium cation is methyl or ethyl, and the acid anion is a carboxylate anion, a sulfonate anion, or a phosphate anion. The gas humidity adjustment 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% by mass. The gas humidity adjustment method according to any one of claims 2 to 5, wherein when the ionic liquid has a concentration of 80% by mass, the first medium <22> has a saturated vapor pressure of 1.9 kPa or lower at 35 ° C and a viscosity of 13 Up to 21 mPa × s. The gas humidity adjustment 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 ² × s. A gas humidity regulator <10>, in which a heat exchange tube <17> and a fin <16> are set in a gas-liquid contact housing <13> in a meandering manner as a gas-liquid contact member <18>, and the gas The liquid contact housing <13> includes an inlet <14> for feeding the gas to be treated, and an outlet <15> for exhausting the processed gas, and the regulator <10> includes a heat exchanger tube <17> The sprinkler pipe <21> spraying the first medium <22> onto the heat exchange pipe <17>, and the second medium <24> passing through the heat exchange pipe <17>. If the gas humidity regulator <10> of the item 8, further includes a pair of a dehumidifier <11> and a humidifier <12>; The first connecting pipe <26> passes through the dehumidified first between the gas-liquid contact housing <13> of the dehumidifier <11> and the sprinkler pipe <21> of the humidifier <12>. Medium <22>; and The second connecting pipe <28> passes through the humidified first between the gas-liquid contact housing <13> of the humidifier <12> and the sprinkler pipe <21> of the dehumidifier <11>. Medium <22>. For example, the gas humidity controller <10> of claim 8 or 9, wherein the heat exchange tube <17> and the fin <16> are made of metal. For example, the gas humidity controller <10> of claim 10, wherein the heat exchange tube <17> and the fins <16> are made of aluminum or stainless steel. The gas humidity regulator <10> according to any one of claims 8 to 11, which is used for the gas humidity regulating method according to any one of claims 1 to 7.