JP3302833B2 - Dehumidification method and dehumidification system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidification method and a dehumidification system.

[0002]

2. Description of the Related Art Conventional dehumidification (dehumidification) devices are roughly classified into a cooling type, an absorption type, an adsorption type, and a compression type according to the dehumidification method. It has a configuration in which an absorbent having a property of absorbing water and treated air are brought into contact with each other to remove moisture in the air. In this case, a device using an absorbent in a solution is called a wet dehumidifier, and a device using an absorbent impregnated in a porous carrier is called a dry dehumidifier.

[0003] Regarding the configuration of a typical wet dehumidifier, this type of conventional dehumidifier includes an absorber for performing a dehumidification process by spraying an absorption liquid onto a processing air with a nozzle or the like; A regenerator that regenerates the absorbing solution whose concentration has been reduced by absorbing moisture.In the absorber, the heat generated at the time of absorbing the water is cooled by a cooling coil or the like, and in the regenerator, The absorption liquid whose concentration has been reduced is heated by a heating coil to evaporate water to increase the concentration and return to the absorber side.

[0004]

However, the above-mentioned absorption type dehumidifier is operated mainly in the daytime, so that the operation cost is high, and especially the cost required for the regeneration operation is high, and the use of the dehumidifier is difficult. It was a major obstacle. This requires the provision of cooling water for cooling on the absorber side and steam for heating on the regenerator side, which increases the number of types of heat sources, resulting in high operating costs of the apparatus. It had become something.

The present invention has been made in view of the above points, and has a configuration in which inexpensive nighttime electric power is used to store cold at nighttime to be used as a cold source for dehumidification (dehumidification) operation in daytime. To solve the above-mentioned problem.

[0006]

In order to achieve the above object, the present invention focuses on a latent heat storage system for loading a latent heat storage material using an inorganic eutectic material into a tank. Lithium chloride liquid that has indirectly exchanged heat with the cold water / refrigerant is stored cold as a latent heat storage material,
In the daytime, this is used as a dehumidifying absorbent to obtain low-humidity air due to the cool storage effect.

Specifically, it has the following configuration. That is, first, according to claim 1, a method for dehumidifying the treated air by bringing the absorbent into contact with the treated air, wherein the lithium chloride liquid stored in the cold by exchanging heat with an appropriate refrigerant at nighttime is used. A dehumidification method is provided, characterized in that it is sometimes used as a cooling source and absorber for dehumidification of process air. In this case, as described in claim 2, heat may be exchanged with a refrigerant of a refrigerator for cooling the processing air during nighttime to cool the air. Further, as described in claim 3, during the nighttime, the lithium chloride solution may be further subjected to a regenerating process, that is, a concentration process, using inexpensive midnight power.

According to the present invention, a liquid storage tank for storing a lithium chloride solution, a cool storage / dehumidification tank containing a cool storage material provided with a spraying device above, a refrigerant for a refrigerator and a cool storage / dehumidification. A heat exchanger for exchanging heat with the liquid in the tank; and a concentrator for concentrating the lithium chloride solution in the storage tank outside the storage tank. In addition to being configured to be able to be supplied to the spraying device in the dehumidifying tank, the liquid in the cool storage / humidification tank is configured to be able to be transferred to the liquid storage tank, and an inlet for processing air into the cool storage / humidification tank. And a discharge port for discharging the introduced processing air to the outside of the tank is provided, and the introduction port and the discharge port are each configured to be freely closed,
A dehumidification system is provided.

According to a fifth aspect of the present invention, in the dehumidification system according to the fourth aspect, the refrigerant of the refrigerator is introduced into the processing air, that is, the cool storage / humidification tank during daytime. It is characterized by being provided with a refrigerant pipe so that it can be used as a refrigerant for pretreatment cooling of the treated air.

[0010]

According to the inventor's knowledge, the lithium chloride liquid used as a dehumidifying absorbent is also excellent as a latent heat storage material. Therefore, as described in claim 1, the lithium chloride liquid which has been cooled by heat exchange with an appropriate refrigerant at nighttime is used as an absorbent for dehumidifying the processing air at daytime, whereby the processing air can be reduced. Thus, dehumidification and cooling can be performed simultaneously. In addition, since heat is stored by exchanging heat with an appropriate refrigerant at night, inexpensive electric power at night can be used.

In this case, if the lithium chloride liquid and the regenerator material are stored by exchanging heat with the refrigerant of the refrigerator for cooling the process air during the daytime, the process air cooling can be performed. Refrigeration equipment can be used efficiently, and there is no need to find another refrigerant source for cold storage. Therefore, when a system is constructed, this can be simplified.

If the lithium chloride solution is subjected to a regeneration treatment at night, the lithium chloride solution can be further concentrated under inexpensive electric power at night. it can.

According to the dehumidifying system of the present invention, at night, the inlet and the outlet are closed, and the lithium chloride solution in the storage tank is transferred to the cool storage / dehumidification tank via the spray device. Then, it can be cooled by the heat exchanger to cool the cold storage material. On the other hand, the lithium chloride solution in the storage tank can be concentrated and regenerated by the concentrator. Then, during the daytime, the cooled lithium chloride liquid in the cool storage / humidification tank is returned to the liquid storage tank, and then the closed state of the inlet and the discharge port is released to introduce the processing air into the cool storage / humidification tank. When the lithium chloride liquid in the liquid storage tank is sprayed from the spraying device, the treated air comes into contact with the lithium chloride liquid into which the regenerator material is dropped, is dehumidified, cooled, and discharged from the discharge port.

In this case, the refrigerant of the refrigerator can be used as pretreatment cooling refrigerant for processing air in the daytime, that is, processing air introduced into the cool storage / humidification tank. If a refrigerant pipe is provided, the refrigerator can be used for cold storage of lithium chloride by a heat exchanger at night and for pre-cooling of processing air at daytime.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a system of a dehumidification system according to the present embodiment. A supply pipe 4 and a regeneration supply pipe 5 are connected to a liquid collection pipe 2 connected to the bottom of the supply pipe 2 via a circulation pump 3. The supply pipe 4 is connected to a cool storage / dehumidification tank 7 via a valve 6.
It is connected to the spraying device 8 provided in the upper part inside.

On the other hand, the regeneration supply pipe 5 is connected via a valve 9 and a liquid heater 10 to a spraying device 12 provided in the upper part of the concentrator 11. The concentrator 11 has a configuration in which outside air taken in by the regenerative blower 13 is introduced into a processing space in the concentrator 11 through an air heater 14, and the lithium chloride liquid sprayed by the spray device 12 is supplied to the concentrator 11. It is configured to be heated by the regenerated air that has passed through the air heater 14 to evaporate water and concentrate the lithium chloride solution. Then, the concentrated lithium chloride solution is returned to the storage tank 1 by the return pipe 15.

A spray device 8 in the cool storage / humidification tank 7
A cold storage material 16 is provided below the space. The cold storage material 16 has a container having an outer shape having a large number of fins on its surface, for example, and the inside thereof is filled with a latent heat storage material. Then, the lithium chloride liquid sprayed from the spray device 8 is dropped on the surface of the cold storage material 16 to cool and cool the dehumidification tank 7.
It descends to the bottom. A return pipe 18 is provided at the bottom of the cool storage / humidification tank 7 through a valve 17.
Is connected, so that the lithium chloride liquid accumulated in the cool storage / dehumidification tank 7 is returned to the liquid storage tank 1 through the return pipe 18.

In the cool storage / humidification tank 7, refrigerant headers 21 and 22 facing each other with the above-mentioned cold storage material 16 interposed therebetween are installed. Outside the tank 7, they are connected by a circulation line 23. A heat exchanger 24 and a circulation pump 25 are provided in the circulation line 23. The heat exchanger 24 includes:
It is configured to exchange heat with the refrigerant of the refrigerator 26,
When the valve 27 is opened, the refrigerant of the refrigerator 26 is
The lithium chloride liquid flowing through the circulation line 23 is supplied to the heat exchanger 24 via the cooling device 8, and is cooled by the heat exchanger 24.

The top plate of the cool storage / dehumidification tank 7 is provided with an inlet 31 and an outlet 32 for the processing air. They are in a positional relationship of being sandwiched and separated. In addition, these inlets 31
The outlet duct 32 is connected to an inlet duct 33 and an outlet duct 34, respectively.
3 and the discharge duct 34 have motor dampers 35 and 36, respectively.
Is interposed. Therefore, each of these motor dampers 3
By closing 5, 36, the cool storage / humidification tank 7 is airtightly shut off from the external atmosphere.

The introduction duct 33 is connected to an outside air introduction passage 37, and air introduced through a filter 38 and an air conditioner 39 is introduced into the cool storage / humidification tank 7 through the introduction duct 33. It has become. On the other hand, a blower 40 is interposed in the discharge duct 34. Therefore, when the blower 40 is operated, the processing air pre-cooled through the air conditioner 39, for example, is introduced into the cool storage / humidification tank 7 through the introduction duct 33 and the introduction port 31, and passes through the cool storage material 16. The air is blown into a predetermined chamber by a blower 40 through a discharge port 32 and a discharge duct 34.

The refrigerant of the air conditioner 39 is supplied to the valve 4
1 and branched from the preceding refrigerant line 28
Thus, it is configured to be supplied from the refrigerator 26 described above.

The dehumidification system according to the present embodiment is configured as described above. Next, an operation example using this dehumidification system will be described. Is made.

That is, first, with the valve 17 closed,
The circulation pump 3 is operated by opening the valve 6, and the liquid storage tank 1 is opened.
A part of the lithium chloride solution in the supply pipe 4 and the spraying device 8
And transferred into the cool storage / humidification tank 7 to be filled.
After the transfer is completed, the valve 6 is closed while the refrigerant line 4 is closed.
The second valve 41 is closed, the valve 27 of the refrigerant line 28 is opened, and the circulation pump 25 is operated, and at the same time, the refrigerator 26 is operated. Then, the lithium chloride liquid in the cool storage / humidification tank 7 circulates through the circulation pipe 23 in the order of the refrigerant header 22 → the heat exchanger 24 → the refrigerant header 21 → the cool storage / humidification tank 7, while the refrigerator 26 The refrigerant circulates through the refrigerant line 28 with the heat exchanger 24, and the lithium chloride liquid in the liquid storage tank 1 is cooled and stored by this heat exchange.

In a state where the valve 9 is opened separately, the lithium chloride solution in the storage tank 1 is supplied to the supply pipe 5 for regeneration.
Through the concentrator 11 while being heated by the liquid heater 10.
Is sprayed into the concentrator 11 by the spraying device 12. At this time, the regenerative blower 13 is operated to supply outside air to the air heater 1.
When introduced into the concentrator 11 while heating by 4, the water in the sprayed lithium chloride solution is exhausted to the atmosphere and concentrated. Then, the concentrated lithium chloride solution is returned into the storage tank 1 through the return pipe 15, and the lithium chloride solution in the storage tank 1 is extremely concentrated in the storage tank 1 by such a circulating concentration path. And be prepared for dehumidifying operation in the daytime.

When the nighttime operation is completed and the cold storage / concentration of the lithium chloride solution and the cold storage material 16 are completed, the daytime dehumidification operation is performed. That is, first, the valve 1 of the return pipe 18 connecting the cold storage / dehumidification tank 7 and the liquid storage tank 1.
7 is opened, and the stored lithium chloride solution in the cold storage / humidification tank 7 is transferred to the liquid storage tank 1. Further, the valve 27 of the refrigerant pipe 28 is closed, and the circulation pump 25 is stopped.

The air conditioner 39 is operated by opening the valve 41 of the refrigerant pipe 42 and the blower 40 is operated. At the same time, the valve 9 of the regeneration supply pipe 5 is closed, and The lithium liquid is sprayed toward the cold storage material 16 in the cold storage / humidification tank 7 through the supply pipe 4 and the spray device 8.

Then, the introduced outside air is pre-cooled and dehumidified by the air conditioner 39, passes through the duct 33 and the inlet 31, and is partially partitioned by the regenerator 16 in the cold storage / dehumidification tank 7. Introduced within. At this time, since the lithium chloride solution is dripped on the surface of the cold storage material 16 by the spraying device 8, the introduced air transfers the lithium chloride solution to the other space in the cool storage / humidification tank 7. Dehumidified by contact with liquid. As described above, the lithium chloride solution itself is cold-stored at nighttime, and the cold storage material 16 also stores extremely large cold heat due to cold storage at nighttime. Not only is absorbed, but also the air itself is cooled. Therefore, the introduced air is cooled at the same time as dehumidification. The air thus dehumidified and cooled is blown by a blower 40 to a predetermined room through a discharge port 32 and a duct 34.

In the daytime, the lithium chloride solution diluted by the dehumidifying operation is returned to the storage tank 1 through the return pipe 18, and is prepared for the next nighttime concentration.

As described above, according to this embodiment, cold storage and concentration of the lithium chloride solution are performed using inexpensive power at night.
And cold storage of the cold storage material can be achieved. In the dehumidification operation in the daytime, it is possible to cool the treated air simultaneously with the dehumidification. Moreover, since the refrigerant used for the cold storage is the refrigerant of the refrigerator 26 used for the air conditioner 39 used for pre-cooling the processing air in the daytime, the operation efficiency of the device itself is also good, and the efficiency is extremely high. It is a good system.

According to the inventor's calculation, the use of the dehumidification system according to the present embodiment provides about one unit in obtaining the same moisture as compared with a dry dehumidifier which cannot use electric power at night.
It turned out that the operation cost was / 5.

In the embodiment described above, it is possible to obtain low-temperature air by installing a humidifier at the outlet of the blower 40.

[0032]

According to the first aspect of the present invention, the dehumidification and the cooling can be simultaneously performed on the processing air.
In addition, since cold is stored by exchanging heat with an appropriate refrigerant at night, cold can be stored using inexpensive electric power at night. According to the dehumidification method of claim 2, since the heat exchange is performed with the refrigerant of the refrigerator for further cooling the processing air, there is no need to obtain another refrigerant source for cool storage, and the refrigerator can be effectively used. It can be used to simplify the system.

According to the dehumidifying method of the third aspect, the lithium chloride solution can be further concentrated under inexpensive electric power at night in preparation for dehumidifying during the daytime.
Cooling is possible.

According to the dehumidification system of the fourth aspect, the methods of the first and third aspects can be carried out, and further, the cold storage and the dehumidification processing can be carried out in one cold storage / dehumidification tank. According to the dehumidification system of the fifth aspect, a refrigerator for pre-cooling the processing air during the daytime can be further effectively used, and the system itself is simplified.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a system of a dehumidification system according to an embodiment of the present invention, and is an explanatory diagram illustrating an operation state at night.

FIG. 2 is a diagram illustrating a system of a dehumidification system according to an embodiment of the present invention, and is an explanatory diagram illustrating an operation state during daytime.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 3, 25 Circulation pump 7 Cold storage / humidification tank 8 Sprayer 11 Concentrator 16 Cold storage material 21, 22 Refrigerant header 24 Heat exchanger 26 Refrigerator 31 Inlet 32 Outlet 39 Air conditioner 40 Blower

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 53/26-53/28 F24F 1/00 F24F 5/00 F28C 1/00 C09K 5/00

Claims (5)

(57) [Claims] 1. A method for bringing a absorbent into contact with treated air to dehumidify the treated air, wherein a cold storage material and a lithium chloride liquid which have been stored by exchanging heat with an appropriate refrigerant at nighttime are:
A dehumidification method characterized in that it is used as an absorbent for a dehumidification cooling source of treated air in the daytime. 2. A method for dehumidifying processing air by bringing an absorbent into contact with processing air, the method comprising storing heat at night to exchange heat with a refrigerant of a refrigerator for cooling the processing air. A dehumidifying method, comprising using a material and a lithium chloride liquid as absorbents of a cooling source for dehumidifying treated air during daytime. 3. The dehumidification method according to claim 1, wherein a regeneration and concentration treatment is performed on the lithium chloride solution at night. 4. A storage tank for storing a lithium chloride liquid, a cool storage / humidification tank containing a cool storage material provided with a spraying device above, a refrigerant of a refrigerator and a liquid in the cool storage / humidification tank. A heat exchanger for heat exchange, and a concentrator for concentrating the lithium chloride solution in the storage tank outside the storage tank, and spraying the lithium chloride solution in the storage tank in the cool storage / humidification tank. The apparatus is configured to be capable of being supplied to the apparatus, and configured to be able to transfer the liquid in the cool storage / humidification tank to the liquid storage tank. Further, an inlet for processing air into the cool storage / humidification tank, and the introduced processing air. A discharge port for discharging the water to the outside of the tank, and the introduction port and the discharge port are each configured to be freely closed. 5. A storage tank for storing a lithium chloride liquid, a cool storage / dehumidification tank containing a cool storage material provided with a spraying device above, a refrigerant of a refrigerator and a liquid in the cool storage / dehumidification tank. A heat exchanger for heat exchange, and a concentrator for concentrating the lithium chloride solution in the storage tank outside the storage tank, and spraying the lithium chloride solution in the storage tank in the cool storage / humidification tank. The apparatus is configured to be capable of being supplied to the apparatus, and configured to be able to transfer the liquid in the cool storage / humidification tank to the liquid storage tank. Further, an inlet for processing air into the cool storage / humidification tank, and the introduced processing air. And a discharge port for discharging the gas to the outside of the tank.The inlet and the discharge port are each configured to be able to be closed.Furthermore, the refrigerant of the refrigerator is also used as a refrigerant for pre-processing and cooling the processing air in the daytime. A dehumidification system characterized by being provided with a refrigerant pipe so as to be free.