TWI511774B - Dehumidification system - Google Patents

Description

Dehumidification system

This invention relates to a gas adsorption system and, more particularly, to a dehumidification system.

Dehumidification technology can be generally divided into compression refrigerating (refrigerati-on), liquid adsorption (liquid sorption), solid adsorption (solid sorption) and membrane separation (membrane separation); among them, freezing Type and solid state adsorption are the most common. Under the impact of the energy crisis, the way of solid-state moisture absorption by zeolite has attracted the attention of researchers because of its most energy-saving and energy-saving. However, the amount of adsorption of the zeolite adsorbent material and the energy and time required for the gas to desorb from it have been the subject of breakthrough. In addition, the binder added during the pelletizing process greatly reduces the adsorption capacity of the zeolite and reduces the rate of adsorption and desorption.

The invention provides a dehumidification system with good dehumidification capability.

The invention provides a dehumidification system comprising a gas guiding device and a hollow adsorption fiber module. a gas guiding device is used to drive the gas; the hollow adsorption fiber module includes at least one hollow Adsorbing fibers for adsorbing moisture in a gas as it passes through the hollow adsorbent fibers. The hollow absorbent fiber includes a tubular body having a first end and a second end and a passage disposed in the tubular body and extending from the first end to the second end.

In an embodiment of the invention, the hollow adsorption fiber module comprises a tubular hollow adsorption fiber bundle composed of a plurality of hollow adsorption fibers.

In an embodiment of the invention, the channel comprises a meandering or inner helical channel.

In an embodiment of the invention, the hollow adsorbent fibers comprise a polymeric material and an adsorbent material.

In an embodiment of the invention, the polymer material comprises polyether-sulfone (PESF), polyphenylsulfone (PPSU) or polyimide (PI).

In an embodiment of the invention, the adsorbent material comprises zeolite A, zeolite X, zeolite Y, tannin, carbon molecular sieve, sorghum molecular sieve, activated carbon or a combination of two or more of the foregoing adsorbent materials.

In an embodiment of the invention, the hollow adsorbent fibers further comprise a conductive material.

In an embodiment of the invention, the hollow adsorbent fibers are two or more layers including at least a first layer and a second layer.

In an embodiment of the invention, the first layer and the second layer of the hollow adsorbent fibers contain different adsorbent materials.

In an embodiment of the invention, the first layer of hollow adsorbent fibers comprises an adsorbent material and the second layer comprises a conductive material.

In an embodiment of the invention, the first layer is within the second layer.

In an embodiment of the invention, the first layer is outside the second layer.

In an embodiment of the invention, the conductive material comprises activated carbon, graphite, carbon black, gold It is a powder, a metal oxide or a combination of two or more of the foregoing conductive materials.

In an embodiment of the invention, the electrically conductive material has a positive temperature coefficient of resistance (PTC).

In an embodiment of the invention, the dehumidification system further includes a power source for flowing current through the hollow adsorbent fibers.

In an embodiment of the invention, the dehumidification system further includes a heating device for desorbing moisture adsorbed to the hollow adsorbent fibers.

In an embodiment of the invention, the dehumidification system further includes a refrigeration device for condensing the moisture desorbed from the hollow adsorbent fibers into liquid water.

In an embodiment of the invention, the dehumidification system further includes a humidity sensing device for sensing the ambient humidity.

In an embodiment of the invention, the gas guiding device is a first gas guiding device for passing gas through the hollow adsorption fiber module. The foregoing dehumidification system further includes a first humidity sensing device, a housing, a cooling device, a water collecting box, a second humidity sensing device, and a temperature sensing device. The first humidity sensing device is disposed on the first gas guiding device for sensing the humidity of the gas passing through the first gas guiding device. The housing has a first opening and a second opening; the hollow absorbent fibers are disposed in the housing; the first gas guiding device is disposed adjacent to the first opening, and the gas enters or leaves the housing via the first opening and the second opening. The refrigeration device is disposed in the casing for condensing the water vapor desorbed from the hollow adsorption fibers into liquid water. The water collecting box is disposed in the casing for storing liquid water. The second humidity sensing device is disposed in the housing and located downstream of the hollow adsorbent fibers for sensing the humidity of the gas passing through or about to pass through the hollow adsorbing fibers. The temperature sensing device is disposed on the hollow adsorption fiber for sensing the temperature of the hollow adsorption fiber.

In an embodiment of the invention, the dehumidification system further includes a second gas guiding device disposed adjacent to the second opening for allowing gas to enter or exit the housing via the second opening.

Based on the above, the present invention provides a dehumidification system comprising a hollow adsorbent fiber and a gas guiding device. The hollow adsorbent fiber is a porous structure. This unique hollow adsorbent fiber has a stronger adsorption capacity than conventional adsorbent materials. If a conductive material having PTC characteristics is added to the hollow adsorbent fiber, the hollow adsorbent fiber can also serve as a heat source for supplying heat to the gas and an overheat protection device.

The above described features and advantages of the present invention will become more apparent from the description of the appended claims.

10, 20, 30‧‧‧ hollow adsorption fibers

12‧‧‧Tubular body

14‧‧‧Zigzag channel

12a‧‧‧ first end

12b‧‧‧second end

22‧‧‧ first floor

24‧‧‧ second floor

40, 204, 304, 404, 504, 604, 704‧‧‧ hollow adsorption fiber module

50, 202, 208, 302, 402, 502, 602, 702 ‧ ‧ gas guiding device

60‧‧‧Center needle

70‧‧‧first nozzle

80‧‧‧second nozzle

100, 200, 300, 400, 500, 600, 700‧‧ dehumidification systems

201, 601‧‧‧ pipes

203, 205, 207, 305, 505, 605, 705‧‧ air

206, 218, 306, 318, 406, 418, 506, 518, 606, 618, 706, 718 ‧ ‧ humidity sensing device

210, 310, 410, 510, 610‧‧‧ power supplies

212, 312, 412, 512, 612, 712‧‧‧ refrigeration equipment

214, 314, 414, 514, 614, 714‧‧ ‧ water collection box

216, 316, 416, 516, 616‧‧‧ temperature sensing devices

303, 403, 503, 603, 703‧‧‧ air

313‧‧‧Condensation zone

315‧‧‧ Path

617‧‧‧ pumping pump

719‧‧‧ heating device

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevational view of one embodiment of a hollow adsorbent fiber of the present invention.

Figure 2 is a cross-sectional view showing an embodiment of the hollow adsorbent fiber of the present invention.

Figure 3 is a cross-sectional view showing an example of a spinning head.

4 is a schematic illustration of one embodiment of a dehumidification system of the present invention.

5A-5F are schematic illustrations of several non-limiting embodiments of a dehumidification system of the present invention.

Figure 6 is a configuration diagram of experimental equipment for a water vapor adsorption experiment.

Fig. 7 is a graph showing the adsorption curves of a straight and spiral hollow adsorbent fiber subjected to an adsorption experiment at a normal pressure and a gas flow rate of 1 L/min.

Fig. 8 is an adsorption curve of a conventional granular, straight, and spiral hollow adsorbent fiber subjected to an adsorption experiment at a normal pressure and a gas flow rate of 5 L/min.

Fig. 9 is an adsorption curve of a straight and spiral hollow adsorbent fiber subjected to an adsorption experiment at a pressure of 2.5 bar and a flow rate of 1 L/min.

Figure 10 is an adsorption curve of a conventional granular, straight, and spiral hollow adsorbent fiber subjected to adsorption experiments at a pressure of 2.5 bar and a flow rate of 5 L/min.

Fig. 11A is an adsorption curve of a hollow adsorption fiber of a straight channel under an atmospheric pressure and a pressure of 2.5 bar, respectively, at a gas flow rate of 1 L/min.

Fig. 11B is an adsorption curve obtained by an adsorption experiment of a hollow adsorption fiber of a spiral passage under a normal pressure and a pressure of 2.5 bar at a gas flow rate of 1 L/min.

In the present specification, a range of values from "a value to another value", even if it does not specifically disclose other values in the range, is defined by any value in the range and any value in the range. Smaller range. For example, the length range of "1 cm to 100 cm" still covers the length range of "2 cm to 58 cm" when the specification does not specifically disclose other values between 1 cm and 100 cm.

The present invention provides a dehumidification system comprising a gas guiding device and a hollow adsorbing fiber. The gas guiding device can transport the gas; the gas guiding device can be a fan (for example, a common DC fan, a Kukker knife fan or a turbo fan, the flow rate can be selected from 2 to 3000 L/min, and the fan voltage is 5 -24 V _DC ). The gas in the environment is driven by the gas guiding device and can pass through the hollow portion of the hollow adsorption fiber. The hollow adsorbent fiber contains an adsorbent material, and when the gas passes through the hollow adsorbent fiber, the moisture in the gas can be adsorbed.

Hereinafter, examples and experimental examples will be given, and the structure and production method of the hollow adsorbent fibers will be specifically described. However, the hollow adsorbent fibers of the present invention are not limited to those described below. For other embodiments of the hollow adsorbent fibers of the present invention, reference may be made to the PCT Patent Application entitled "REGENERABLE ADSORPTION UNIT", filed on March 14, 2008, at the World Intellectual Property Office (WIPO) (Publication No. WO 2008/110820) A1), filed on December 19, 2012 at the US Patent Office, the patent application entitled "HOLLOW FIBERS HAVING WINDING CHANNEL" (Application No. 13/719945) and the US Patent Provider on December 20, 2012 The Patent Office (USPTO) proposes a provisional patent application entitled "HOLLOW FIBER ADSORBENT AIR DEHUMIDIFIER" (Application No. 61/740,441). The disclosure of the foregoing three cases is hereby incorporated by reference in its entirety in its entirety in its entirety in its entirety.

Figure 1 is a side elevational view of one embodiment of a hollow adsorbent fiber of the present invention. In order to clearly show the structure of the hollow adsorbent fibers, FIG. 1 further shows a tortuous path inside the hollow adsorbent fibers in a broken line.

As shown in FIG. 1, in the present embodiment, the hollow adsorbent fiber 10 includes a tubular body 12 and a meandering channel 14. The tubular body 12 has a first end 12a and a second end 12b; the meandering channel 14 is disposed in the tubular body 12 and extends from the first end 12a to the second end 12b. The tubular body 12 can have a porous structure so that the gas can be adsorbed to the tubular body 12 as it passes through the tortuous path 14. In an embodiment, the meandering channel 14 may be a spiral channel, but the invention is not limited thereto. In other embodiments, the tortuous channel 14 may also be a zigzag or other kind of curve. Curved channel. Alternatively, the hollow adsorbent fibers may also be comprised of a tubular body and a straight passage (not shown). If the channel is curved, the gas will travel through the hollow adsorbent fibers over a longer path, and the adsorption and separation will be better.

In the present embodiment, the diameter of the meandering channel 14 is between 0.05 mm and 9.95 mm, such as 0.1 mm to 5 mm, 0.5 mm to 2 mm, 0.2 mm to 0.6 mm, and 1 mm to 3 mm. The length of the tubular body 12 can be from 10% to 90% of the length of the tortuous channel 14, such as 20% to 60%, 20% to 40%, 10% to 80%, 20% to 70%. The wall thickness of the tubular body 12 may be between 0.05 mm and 9.95 mm, such as 0.5 mm to 4 mm, 0.5 mm to 2 mm, 0.1 mm to 9 mm, 0.2 mm to 8 mm, 1 mm to 4 mm, 1 mm to 5 mm. The outer diameter of the tubular body 12 may be between 0.1 mm and 10 mm, such as 1 mm to 5 mm, 1 mm to 3 mm, 3 mm to 8 mm, 2 mm to 4 mm, 0.2 mm to 2.5 mm, 0.3 mm to 6 mm, 0.5 mm to 3 mm. The effective surface porosity of the tubular body 12, i.e., the ratio of surface porosity to the length of the pores, ε / L _p , may be between 100 and 10,000, such as 200 to 8000, 400 to 6000. The diameter of the tubular body 12 may be between 1 nm and 50 μm, such as 0.1 μm to 10 μm, 1 nm to 100 nm, 10 nm to 50 μm. The surface-area-to-volume ratio of the tubular body 12 may be between 10 m ² /m ³ and 20,000 m ² /m ³ , for example, 10 m ² /m ³ to 10000 m ² /m ³ , 200 m ² /m ³ to 6000 m ² /m ³ , 1000 m ² /m ³ to 4000 m ² /m ³ , 100 m ² /m ³ to 5000 m ² /m ³ , 250 m ² /m ³ to 3000 m ² /m ³ , 500 m ² /m ³ to 8000 m ² /m ³ .

In the present embodiment, the hollow adsorbent fibers 10 include a polymer material and an adsorbent material. The polymer material can be used as a binder, and the proportion of the hollow adsorbent fibers 10 can be between 5 wt% and 90 wt%. The selection of the polymer material requires at least the following factors: 1) the mechanical properties (softness) required for the hollow adsorbent fiber 10; 2) the heat resistance required for the hollow adsorbent fiber 10; and 3) between the polymer material and the adsorbent material. Compatibility. The polymer materials are, for example, polyfluorene (PSF), polyethersulfone (PESF), polyphenylsulfone (PPSU), polyvinylidene fluoride (PVDF), cellulose acetate (cellulose acetate). CA), polyimide (PI) or a mixture of two or more of the foregoing compounds.

In the present embodiment, the proportion of the adsorbent material in the hollow adsorbent fibers 10 may be between 80 wt% and 95 wt%. The adsorbent material may be in a powder form, and is, for example, a type A zeolite (for example, 3A, 4A or 5A), a type X zeolite (10X), a type Y zeolite (13X), a silica gel, a carbon molecular sieve. , a high silica molecular sieve, activated carbon or a combination of two or more of the foregoing adsorbent materials.

In the present embodiment, the hollow adsorbent fibers 10 may further contain a conductive material. In general, the method of desorbing a gas from an adsorbent material is to heat the adsorbent material (and the gas adsorbed thereto) so that the gas has a higher energy, thereby overcoming the attraction of the adsorbent material to the gas. If the hollow adsorbent fibers 10 contain a conductive material, the hollow adsorbent fibers 10 can be heated by joule heating (i.e., current is passed through the hollow adsorbent fibers 10). Thereby, additional heating means can be omitted, the system can be simplified, and the cost can be reduced. The conductive material may be in a powder form such as activated carbon, graphite, carbon black, metal powder, metal oxide (such as copper oxide or BaTiO ₃ ) or a combination of two or more of the foregoing conductive materials. In addition, the conductive material may be a material having a positive temperature coefficient of resistance (PTC). More specifically, the resistance of the conductive material may rise sharply when the temperature rises to a certain degree, thereby achieving power-off protection. Effect.

Figure 2 is a cross-sectional view showing an embodiment of the hollow adsorbent fiber of the present invention, the cross section of Figure 2 being perpendicular to the axial direction of the hollow adsorbent fibers. In FIG. 2, the hollow adsorbent fibers 20 are a two-layer structure including a first layer 22 and a second layer 24. However, the present invention is not limited thereto. In other embodiments, the hollow adsorption fibers 20 may be a single layer structure or a multilayer structure of more than two layers.

As shown in FIG. 2, the hollow adsorbent fibers 20 include a first layer 22 and a second layer 24. In FIG. 2, the first layer 22 is depicted as an inner layer and the second layer 24 is illustrated as an outer layer; however, the following description of the first layer 22 and the second layer 24 is not limited to this configuration, that is, In other embodiments of the two-layer structure, the first layer 22 can be an outer layer and the second layer 24 can be an inner layer.

The first layer 22 and the second layer 24 may contain the same or different materials. Specifically, the first layer 22 and the second layer 24 may each comprise the same or different polymeric materials, adsorbent materials or conductive materials. Here, the selection of various materials can be referred to the content described with respect to FIG. If the first layer 22 and the second layer 24 contain the same material, their porosity or pore size must be different to distinguish them into two different layers. In an embodiment, the first layer 22 and the second layer 24 may contain different adsorbent materials, thereby making the hollow adsorbent fibers 20 a multifunctional adsorbent fiber. For example, with proper material selection, the first layer 22 can adsorb moisture while the second layer 24 It can adsorb carbon dioxide or be used to deodorize. Further, the two-layer or two-layer multilayer structure also has an effect of adjusting the mechanical properties of the hollow adsorbent fibers. For example, a large amount of adsorbent material may be disposed in the inner layer to promote the adsorption effect of the hollow adsorbent fibers, and at the same time, a large amount of polymer material is disposed on the outer layer to ensure the mechanical properties of the hollow adsorbent fibers.

In an embodiment, the first layer 22 may contain an adsorbent material without a conductive material; the second layer 24 contains a conductive material. At this time, the second layer 24, which is also referred to as a conductive hollow fiber, can be used to heat (by Joule heating) the hollow adsorbent fibers 20. In this embodiment, the first layer 22 and the second layer 24 are different in heat resistance, and therefore, each may comprise a different polymer material, for example, the first layer 22 may contain PESF or PPSU, and the second layer 24 It may contain PI and contain both PESF or PPSU. In another embodiment, the second layer 24 may additionally contain an adsorbent material (for example, 10 wt%) in addition to the conductive material to enhance the adsorption capacity of the hollow adsorbent fibers 20. In Fig. 2, the conductive hollow fiber is the outer layer of the hollow adsorbent fiber 20, but the invention is not limited thereto. In other embodiments, the electrically conductive hollow fibers can also be the inner layer of hollow absorbent fibers.

Next, a method of producing the hollow adsorbent fiber will be exemplified. Although the following is an example of a double-layer fiber, however, those having ordinary knowledge in the field of spinning technology can produce any of the above-mentioned fibers (including single-layer fibers and multilayer fibers) without undue experimentation according to the following description. ).

1. "Preparation of spinning dope"

1) Preparation of polymer solution

A polymer material (for example, about 100 g) is selected and placed in a 1 L glass bottle. The polymer material may be PSF, PESF, PPSU, CA, PVDF or PI. Add N-methyl-2-pyrrolidone (NMP), dimethyl acetamide (DMAC), dimethyl formamide (DMF) or other organic solvents (eg about 400 ml to 500 ml). Place the polymer/organic solvent mixture in a drum mixer (turn The speed is, for example, 50 rpm to 100 rpm), and stirred for about 24 hours until the polymer is completely dissolved.

2-1) Preparation of spinning dope of adsorbed fiber

Place the polymer/organic solvent clear solution in a high-speed stirrer (for example, 1000 rpm to 3000 rpm), and slowly add a powder adsorbent material having a weight of 4 to 7 times (for example, 500 g to 700 g) of the polymer material. (For example, 3A, 4A, 5A, 13X or silicone), stir for 6 hours to 12 hours.

2-2) Preparation of spinning dope of conductive fiber

Place the polymer/organic solvent clear solution in a high-speed stirrer (for example, 1000 rpm to 3000 rpm), and slowly add a powder conductive material having a weight of 4 to 7 times (for example, 500 g to 700 g) of the polymer material. (for example, carbon molecular sieve, activated carbon, carbon black, graphite or metal oxide), stirred for 6 hours to 12 hours.

3) The mixture obtained in the step 2-1 or 2-2 is placed in a tumbler (rotation speed, for example, 50 rpm to 100 rpm), and degased for 24 hours to 48 hours.

2. <Spinning Process>

1) providing a spinneret having a central tube and a first nozzle surrounding the central needle and a second nozzle; wherein the center needle has a bevel angle of 0 to 90 degrees . 3 is a cross-sectional view of an example of a spinneret in which the center needle, the first nozzle and the second nozzle are designated by the symbol numbers 60, 70 and 80, respectively. In Figure 3, the central needle 60 has an oblique angle of 45 degrees and the hollow fibers made through such a spinning head will have internal helical passages.

2) by applying a pressure of a gas (for example, 4 to 6 bar of nitrogen), a bore fluid such as water, acetone or ethanol flows out from the center needle (flow rate is, for example, 4 ml/min to 10 ml/min), The first spinning dope flows out of the first nozzle, and the second spinning dope flows out from the second nozzle. If a hollow fiber with a straight passage is to be made, the bevel angle of the center needle is maintained at 0 degrees; If a hollow fiber having an inner spiral passage is to be made, the bevel angle of the center needle is maintained to be greater than 0 degrees, and at the same time, the driving motor on the spinning head (for example, 60 rpm to 120 rpm) is started, so that the center needle starts to spin. To form a hollow fiber precursor having an inner spiral structure.

3) The hollow fiber precursor is coagulated in a coagulation tank (condensation liquid such as water) to obtain a hollow fiber.

4) The hollow fiber is allowed to stand in the coagulation tank for 24 hours to 48 hours to be completely formed.

5) Remove the hollow fiber from the coagulation tank and let it dry naturally.

Table 1 shows the formulations of the hollow adsorbent fibers of Samples 1 and 2.

In Table 1, Sample 1 is a hollow adsorbent fiber having a two-layer structure in which both the inner layer and the outer layer are composed of an adsorbent material and a polymer. Sample 2 is also a hollow adsorbent fiber having a two-layer structure, the inner layer of which is composed of an adsorbent material and a polymer material, the outer layer is composed of a conductive material and a polymer material, and the outer layer of the conductive material may also have an adsorption capacity (for example, The conductive material is activated carbon). Of course, the invention is not limited to the various materials disclosed in Table 1. In fact, almost all conventional powder-based adsorbent materials can be made into hollow adsorbent fibers by the aforementioned method.

4 is a schematic illustration of one embodiment of a dehumidification system of the present invention. As shown in FIG. 4, after the preparation of the hollow adsorption fiber is completed, a plurality of hollow adsorption fibers 30 are taken, and the conventional fixed hand is used. The segment fixes it into a bundle, that is, the hollow adsorption fiber module 40 is completed. A gas guiding device 50 (for example, an exhaust fan) is disposed at one end of the hollow adsorption fiber module 40, that is, a prototype of the dehumidification system 100 is constructed. When the gas passes through the hollow adsorption fiber 30, the adsorption amount thereof is related to the gas flow rate, and the larger the flow rate, the lower the adsorption amount; therefore, the gas transportation amount of the gas guiding device 50 is adjusted (for example, if the gas guiding device 50 is a fan, Adjust the speed or power) to adjust the dehumidification force of the dehumidification system.

In one embodiment, the total power of the dehumidification system 100 is about 100 watts (including a fan power of 0.48-5 watts, a conductive fiber or a PTC heating device of about 60 watts. If a chiller is used, its power is about 30 watts. And the dehumidification system When the 100 is in operation, the start-up time of the heating and cooling device only accounts for 1/3~1/2 of the adsorption time, so the total power consumption is much lower than 100 watts. At the same time, only the fan generates noise when the dehumidification system 100 operates. The noise value is much less than 25 dBA. In contrast, the current market dehumidification turbines generally consume between 200-600 watts or even more than 600 watts, mainly because the dehumidification wheel's heating and desorption system is continuously operated, and the heating device power accounts for the total. The power of 1/2 or more, and the dehumidification wheel uses a high-torque fan (noise value is more than 39 dBA, power is 50-60 watts or more), so the power of the dehumidification system 100 is much lower than the current dehumidification wheel system.

The dehumidification system of the present invention may include other components in addition to the hollow adsorption fibers and the gas guiding device. Some possible implementations are listed below with reference to the drawings.

5A-5F are schematic illustrations of several non-limiting embodiments of a dehumidification system of the present invention. For the sake of simplicity of the description, spatially relative terms such as "upper", "lower", "left", "right", and the like are used herein to describe the relationship of one element in the figure to the other. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, elements that are described as "under" other elements will be "on" the other elements. Therefore, the exemplary term "lower" can encompass both "upper" and "lower" orientations. The device may be oriented in other ways, and the spatially relative terms used herein shall be interpreted accordingly.

Referring to FIG. 5A, the dehumidification system 200 includes a gas guiding device 202 and a hollow adsorption fiber module 204. The hollow adsorption fiber module 204 is placed in the housing. The casing of the present invention is not particularly limited as long as it can accommodate the hollow adsorption fiber module 204 and various additional devices described below. In this embodiment, the housing may be a tube 201, and the tube 201 may be a tube of glass, plastic or metal. In FIGS. 5A to 5F, the hollow adsorption fiber module is presented in a simplified manner (blocks and straight lines); it should be understood that the hollow adsorption fiber module may include at least one hollow adsorption fiber (for example, 100 pieces), and the entire group thereof The state can be similar to that shown in FIG.

In the present embodiment, the hollow adsorbent fibers contain a conductive material, and the dehumidification system 200 may further include a power source 210 for allowing current to flow through the hollow adsorbent fibers. For example, the power source 210 can be wire-bonded to both ends of the hollow adsorbent fiber module 204. After the energization, the hollow adsorption fiber itself is heated by the flow of current, and the moisture adsorbed on the hollow adsorption fiber is desorbed. In other embodiments, if the hollow adsorbent fibers do not contain a conductive material, a heating device may be additionally provided in the dehumidification system for the purpose of desorbing moisture.

In the present embodiment, the dehumidification system 200 further includes a humidity sensor 206, a humidity sensing device 218, and a cooling device 212. The humidity sensing device 206 and the humidity sensing device 218 are used to sense the ambient humidity. For example, the humidity sensing device 206 can sense the humidity of the gas passing through the gas guiding device 202, and the humidity sensing device 218 can sense the environment inside the pipe 201. Humidity (which is, for example, equal to the humidity of the gas passing through the hollow adsorption fiber module 204). The cooling device 212 is, for example, a cooler made of a thermoelectric material, and allows water vapor desorbed from the hollow adsorbing fibers to be condensed into liquid water. In addition, the dehumidification system 200 may further include a control unit (not shown); the control unit is connected to each unit of the dehumidification system 200, and coordinates the gas guiding device 202, the power source 210 (or the heating device), and the cooling device 212 according to the environmental humidity. The operation to optimize the dehumidification effect.

When the humidity sensing device 206 detects that the indoor humidity is too high, the dehumidification system 200 is removed. The wet function starts. The air 203 in the environment is driven by the gas guiding device 202 above the hollow adsorption fiber module 204, passes through the opening at the top of the pipe 201, enters the hollow adsorption fiber module 204, and the hollow adsorption fiber absorbs its moisture, and then absorbs the hollow by hollow adsorption. The gas guiding device 208 below the fiber module 204 allows the dried air 205 to be introduced into the chamber through the opening at the bottom of the tube 201.

After the humidity sensing device 206 detects that the indoor humidity is lowered, or the humidity sensing device 218 detects that the adsorption amount of the hollow adsorbing fibers is saturated, the power source 210 is activated to cause current to flow through the hollow adsorbing fibers (in the present embodiment, the hollow adsorbing fibers Contains conductive materials). The power source 210 is, for example, a 110V AC voltage source. The water vapor is desorbed from the hollow adsorbed fibers by heat. The moisture may condense as it passes through the refrigeration unit 212 (e.g., a heat exchange network or a fin) or may be condensed by the action of the cold air 207. The condensed water is collected by the water collection tank 214. In addition, by temperature sensing device 216 (eg, a thermocouple), the maximum temperature of the hollow adsorbent fibers can be set, for example, 150 ° C to avoid overheating of the system.

Referring to FIG. 5B, the dehumidification system 300 includes a gas guiding device 302, a hollow adsorption fiber module 304, a humidity sensing device 306, a humidity sensing device 318, a power source 310, a cooling device 312, a condensation zone 313, a water collection box 314, and a temperature. Induction device 316. Other elements than the condensing zone 313 may be the same as the corresponding components of Figure 5A.

When the humidity sensing device 306 detects that the indoor humidity is too high, the dehumidification function of the dehumidification system 300 is activated. The air 303 in the environment is driven by the gas guiding device 302 and enters the hollow adsorption fiber module 304 from the left. After the hollow adsorbent fibers adsorb moisture in the air 303, the dry air 305 is discharged from the right side of the hollow adsorbent fiber module 304.

After the humidity sensing device 306 detects that the indoor humidity is lowered, or the humidity sensing device 318 detects that the adsorption amount of the hollow adsorbing fibers is saturated, the power source 310 is activated to cause current to flow through the hollow adsorbing fibers. The water vapor is desorbed from the hollow adsorbed fibers by heat. The hot water gas enters the condensation zone 313. At this time, the refrigerating device 312 is activated to condense the water vapor, and the liquid water is collected by the water collecting box 314. The waste heat generated by the refrigeration unit 312 can be supplied to the hollow adsorption fiber module 304 to further promote moisture desorption. During the desorption process, the hot gas exhausted from the right side of the hollow adsorption fiber module 304 can be returned to the condensation zone 313 via the additionally designed conduit, along the path 315, and the hollow adsorption fiber module 304 is heated. During this time, by means of the temperature sensing device 316, the maximum temperature of the hollow adsorbent fibers can be set, for example 150 ° C, to avoid overheating of the system.

Referring to FIG. 5C , the dehumidification system 400 includes a gas guiding device 402 , a hollow adsorption fiber module 404 , a humidity sensing device 406 , a humidity sensing device 418 , a power source 410 , a cooling device 412 , a water collecting box 414 , and a temperature sensing device 416 .

When the humidity sensing device 406 detects that the indoor humidity is too high, the dehumidification function of the dehumidification system 400 is activated. The air 403 in the environment is driven by the gas guiding device 402, and enters the hollow adsorption fiber module 404 from the right side, and the moisture is adsorbed by the hollow adsorption fibers, and then discharged from the left side of the hollow adsorption fiber module 404.

After the humidity sensing device 406 detects that the indoor humidity is decreasing, or the humidity sensing device 418 detects that the adsorption amount of the hollow adsorbing fibers is saturated, the power source 410 is activated to cause current to flow through the hollow adsorbing fibers. The moisture is desorbed from the hollow adsorbent fibers by heat and condenses as it passes through the refrigeration unit 412. The condensed water is collected by the water collection tank 414. By means of the temperature sensing device 416, the maximum temperature of the fibers can be hollowed up, for example 150 ° C, to avoid overheating of the system.

Referring to FIG. 5D , the dehumidification system 500 includes a gas guiding device 502 , a hollow adsorption fiber module 504 , a humidity sensing device 506 , a humidity sensing device 518 , a power source 510 , a cooling device 512 , a water collecting box 514 , and a temperature sensing device 516 .

When the humidity sensing device 506 detects that the indoor humidity is too high, the dehumidification function of the dehumidification system 500 is activated. The air 503 in the environment is driven by the gas guiding device 502 and enters the hollow adsorption fiber module 504 from above. After the hollow adsorbent fibers adsorb the water, the dry air 505 is discharged from the outlets on the left and right sides of the hollow adsorbent fiber module 504.

The humidity sensing device 506 detects a decrease in indoor humidity, or the humidity sensing device 518 After detecting that the adsorption amount of the hollow adsorbent fibers is saturated, the power source 510 is activated to cause a current to flow through the hollow adsorbent fibers. The water vapor is desorbed from the hollow adsorbed fibers by heat. The moisture can condense as it passes through the refrigeration unit 512. The condensed water is collected by the water collection tank 514. By means of the temperature sensing device 516, the maximum temperature of the hollow adsorbent fibers is set to 150 ° C to avoid overheating of the system.

Referring to FIG. 5E , the dehumidification system 600 includes a gas guiding device 602 , a hollow adsorption fiber module 604 , a humidity sensing device 606 , a humidity sensing device 618 , a power source 610 , a cooling device 612 , a water collecting box 614 , a temperature sensing device 616 , and Pumping pump 617.

When the humidity sensing device 606 detects that the indoor humidity is too high, the dehumidification function of the dehumidification system 600 is activated. The air 603 in the environment is driven by the gas guiding device 602 to enter the hollow adsorbing fiber module 604 from the opening at the bottom of the tube 601. After the hollow adsorbent fibers adsorb their moisture, the dry air 605 is discharged from the opening at the top of the pipe 601.

After the humidity sensing device 606 detects a decrease in the indoor humidity, or the humidity sensing device 618 detects that the adsorption amount of the hollow adsorbing fibers is saturated, the power source 610 is activated to cause a current to flow through the hollow adsorbing fibers. At the same time, the pumping pump 617 is activated and the gas guiding device 602 is turned off. At this point, the gas moves in a direction opposite to the direction of motion during the dehumidification process (from top to bottom). The water vapor is desorbed from the hollow adsorbed fibers by heat. The moisture can condense as it passes through the refrigeration unit 612. The condensed water is collected by the water collection tank 614. By means of the temperature sensing device 616, the maximum temperature of the hollow adsorbent fibers can be set, for example 150 ° C, to avoid overheating of the system.

Referring to FIG. 5F, the dehumidification system 700 includes a gas guiding device 702, a hollow adsorption fiber module 704, a humidity sensing device 706, a humidity sensing device 718, a cooling device 712, a water collecting box 714, and a heating device 719.

When the humidity sensing device 706 detects that the indoor humidity is too high, the dehumidification function of the dehumidification system 700 is activated. The air 703 in the environment is driven by the gas guiding device 702, and enters the hollow adsorption fiber module 704 from above, and the hollow adsorption fiber absorbs the water, and then the hollow adsorption fiber module Dry air 705 is discharged from the lower outlet of 704.

After the humidity sensing device 706 detects a decrease in the indoor humidity, or the humidity sensing device 718 detects that the adsorption amount of the hollow adsorbing fibers is saturated, the heating device 719 is activated. The heating device 719 is, for example, a PTC heating device that can automatically control temperature at 200 °C. The water vapor is desorbed from the hollow adsorbent fibers by heat, and condenses when passing through the cooling device 712. The condensed water is collected by the water collection tank 714.

Above, various embodiments have been described in accordance with the concepts of the present invention. Here, it should be noted that the present invention is not limited to the foregoing embodiments. The respective constituent elements described in the above respective embodiments may be combined with each other or change the spatial arrangement relationship between them as necessary and appropriate to constitute a new embodiment. For example, the heating device 719 of Figure 5F can be combined with the dehumidification system 200 of Figure 5A to form a new dehumidification system. This and other possible configurations are within the scope of the invention.

<experiment>

The effects of the present invention will be described below by way of experimental examples. Although the following experiments are described, the materials used, their amounts and ratios, processing details, processing procedures, and the like can be appropriately changed without departing from the scope of the invention. Therefore, the invention should not be construed restrictively by the experiments described below.

Figure 6 is a configuration diagram of experimental equipment for a water vapor adsorption experiment. In the water vapor adsorption experiment, nitrogen (N ₂ ) was selected as the gas that carries water and gas through the reaction chamber. The reaction chamber is an adsorbent material (a conventional adsorbent material or a hollow adsorbent fiber module). The flow rate of nitrogen gas was adjusted to 1 L/min and 5 L/min, respectively, using a mass flow controller (MFC). The reaction pressure can be controlled by a pressure gauge at the rear end of the reactor. Nitrogen gas was passed through an aqueous gas buffer bottle so that the relative humidity of the effluent gas was 100% RH (dew point 20 ° C). After the conditions are stable, the adsorption experiment can be performed. The gas passing through the reactor is detected and analyzed by TEKHNE TK-100 Dewpoint Transmitter, and the change of the dew point can be measured immediately, thereby knowing the water vapor adsorption capacity of the adsorbent material.

The molecular sieve selected for the experiment is 13X commercial products of UOP (Universal Oil Products) Co., Ltd. The adsorption materials are in the form of traditional particles (13X-pellet) and hollow adsorption fibers; hollow adsorption fibers can be divided into straight lines according to the difference of channel type. (13X-straight) and spiral (13X-spiral).

Fig. 7 is a graph showing the adsorption curves of a straight and spiral hollow adsorbent fiber subjected to an adsorption experiment at a normal pressure and a gas flow rate of 1 L/min. It can be seen from Fig. 7 that the adsorption time of the inner spiral hollow adsorption fiber is long, because the inner spiral type channel can increase the reaction path and prolong the contact time of the water gas with the adsorbent material, so that the adsorbent material is in weight, When the pressure is the same as the gas flow rate, more water can be adsorbed and the dehumidification capacity can be increased.

Fig. 8 is an adsorption curve of a conventional granular, straight, and spiral hollow adsorbent fiber subjected to an adsorption experiment at a normal pressure and a gas flow rate of 5 L/min. Regardless of whether the channel of the hollow adsorbent fiber is straight or spiral, the adsorption effect is superior to that of the conventional particle form. The result is that the inner layer of the hollow adsorbent fiber is a porous structure, and the shape of the hole is coral-like. The structure or dendrite structure extends from the inside to the outside; when the gas passes, the structure provides a passage for the gas molecules to be adsorbed quickly and efficiently.

Figure 9 is a graph showing the adsorption experiments of a straight and spiral hollow adsorbent fiber at a pressure of 2.5 bar and a flow rate of 1 L/min. It can be seen from Fig. 9 that the adsorption time of the inner spiral hollow adsorption fiber is longer, and the instantaneous adsorption capacity is superior to the hollow adsorption fiber of the straight channel. The breakdown time of the two differs by about 5 hours.

Figure 10 is an adsorption curve of a conventional granular, straight, and spiral hollow adsorbent fiber subjected to adsorption experiments at a pressure of 2.5 bar and a flow rate of 5 L/min. It can be seen that the inner spiral hollow adsorption fiber still exhibits a better adsorption capacity, and the failure time is shorter than that of the straight channel. The height is about 1 hour higher. The adsorption effect of the 13X particle adsorption material is still not clear, and the lowest dew point is only about -45 ° C, which is significantly higher than the lowest dew point that the hollow adsorption fiber can reach.

Fig. 11A and Fig. 11B show the adsorption results of the hollow adsorption fibers of the straight channel and the spiral channel, respectively, under different reaction pressure conditions (normal pressure, 2.5 bar) at the same flow rate (1 L/min). Compared with the experimental results under normal pressure, when the pressure is 2.5 bar, the dew point temperature can reach below -60 °C, and the adsorption time is extended to nearly 30 hours. This shows that as the pressure increases, the amount of water vapor adsorbed also increases because the high pressure causes the gas molecules to diffuse more into the hollow adsorbent fibers, so that more adsorption sites can be effectively utilized.

In summary, the present invention provides a dehumidification system comprising a hollow adsorption fiber and a gas guiding device. The hollow adsorbent fiber is a porous structure and includes a high content of adsorbent material and a polymer material which can be used as a binder. Compared with the conventional adsorption materials, this unique hollow adsorption fiber has a faster adsorption speed, a longer adsorption time, and has advantages in application such as light weight and small volume. If a conductive material having PTC characteristics is added to the hollow adsorbent fiber, the hollow adsorbent fiber itself can be used as a heat source by applying a voltage to supply heat energy required for gas desorption, and the PTC characteristic of the conductive material will cause the hollow adsorbent fiber to have Power-off protection ensures safety during use.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

30‧‧‧ hollow adsorption fiber

40‧‧‧ hollow adsorption fiber module

50‧‧‧ gas guiding device

100‧‧‧Dehumidification system

Claims (19)

A dehumidification system comprising: a gas guiding device for driving a gas; and a hollow adsorption fiber module comprising at least one hollow adsorption fiber for passing the hollow adsorption fiber of the gas through the hollow adsorption fiber module At the time of adsorbing moisture in the gas, wherein the hollow adsorbent fiber is a two-layer or multi-layer structure including at least a first layer and a second layer, the hollow adsorbing fiber comprising: a tubular body having a first end and a second And a channel disposed in the tubular body and extending from the first end to the second end, wherein the channel comprises a meandering or inner helical channel. The dehumidification system according to claim 1, wherein the hollow adsorption fiber module comprises a tubular hollow adsorption fiber bundle composed of a plurality of hollow adsorption fibers. The dehumidification system of claim 1, wherein the hollow adsorbent fibers comprise a polymer material and an adsorbent material. The dehumidification system according to claim 3, wherein the polymer material comprises polyethersulfone (PESF), polyphenylsulfone (PPSU) or polyimide (PI). The dehumidification system according to claim 3, wherein the adsorbent material comprises zeolite A, zeolite X, zeolite Y, tannin, carbon molecular sieve, sorghum molecular sieve, activated carbon or two or more of the foregoing adsorbent materials. combination. The dehumidification system of claim 1, wherein the hollow adsorbent fibers further comprise a conductive material. The dehumidification system of claim 1, wherein the first layer and the second layer contain different adsorbent materials. The dehumidification system of claim 1, wherein the first layer comprises an adsorbent material and the second layer comprises a conductive material. The dehumidification system of claim 8, wherein the first layer is within the second layer. The dehumidification system of claim 8, wherein the first layer is outside the second layer. The dehumidification system of claim 6, wherein the electrically conductive material comprises activated carbon, graphite, carbon black, metal powder, metal oxide or a combination of two or more of the foregoing electrically conductive materials. The dehumidification system of claim 6, wherein the electrically conductive material has a positive temperature coefficient of resistance (PTC). The dehumidification system of claim 12, further comprising a power source for allowing current to flow through the hollow adsorbent fibers. The dehumidification system of claim 1, further comprising a refrigeration device for condensing moisture desorbed from the hollow adsorbent fibers into liquid water. The dehumidification system of claim 1, further comprising a humidity sensing device for sensing the ambient humidity. The dehumidification system of claim 1, wherein the gas guiding device is a first gas guiding device for passing gas through the hollow adsorption fiber module; the dehumidification system further comprises: first a humidity sensing device disposed on the first gas guiding device for sensing a humidity of the gas passing through the first gas guiding device; the housing having a first opening and a second opening, the hollow adsorption a fiber module disposed in the housing, the first gas guiding device being disposed adjacent to the first opening, and gas passing through a first opening and the second opening enter or leave the housing; a cooling device disposed in the housing for condensing moisture desorbed from the hollow adsorbent fibers into liquid water; collecting water a box disposed in the housing for storing the liquid water; a second humidity sensing device disposed in the housing and located downstream of the hollow adsorption fiber module for sensing passage Or the humidity of the gas that is about to pass through the hollow adsorption fiber module; and the temperature sensing device is disposed on the hollow adsorption fiber module to sense the temperature of the hollow adsorption fiber module. The dehumidification system of claim 16, further comprising a second gas guiding device disposed adjacent to the second opening for allowing gas to enter or exit the housing via the second opening. The dehumidification system of claim 16, further comprising a power source for allowing current to flow through the hollow adsorbent fibers. The dehumidification system of claim 16, further comprising a heating device for desorbing moisture adsorbed to the hollow adsorbent fibers.