TWI771584B - Adsorption apparatus and adsorption method - Google Patents

Abstract

An adsorption apparatus includes an intake unit, an exhaust unit and at least two adsorption modules. The intake unit is configured to provide a mixed gas that is higher than an atmospheric pressure. The exhaust unit is configured to provide an evacuation environment below an atmospheric pressure. One of the adsorption modules is connected to another one of the adsorption modules, and each adsorption module is connected to the intake unit and the exhaust unit, and includes a pressure switch unit and a hollow fiber adsorption unit. The hollow fiber adsorption unit includes at least one hollow fiber adsorption material which is tubular. The mixed gas is adsorbed when the adsorption modules at a high operating pressure and the adsorption modules are regenerated at a low operating pressure. The operation of each adsorption module is controlled by each pressure switch unit, therefore achieving the continuous production of product gas with low energy consumption.

Description

Adsorption device and adsorption method

The present invention relates to an adsorption device and an adsorption method, and in particular, to an adsorption device and an adsorption method using hollow fibers as adsorption materials.

In traditional industries and high-tech processes, the quality requirements for high-purity gas are extremely strict. In order to meet the quality requirements of high-purity gas, many related filtration, cleaning and purification equipment need to be equipped in the engineering system to obtain high-quality clean high-purity gas. .

However, the traditional gas purification treatment method has complicated operation process, high operation cost, high energy consumption, and requires high pressure (7kg/cm ² ~15kg/cm ² ) and 10%-30% product gas consumption during the operation process. In view of the above, the consumption of energy can be reduced by solving the gas loss and energy conversion efficiency caused in the purification process of high-purity gas. Therefore, how to reduce unnecessary energy consumption in the process of purifying gas has become the joint goal of relevant industry players.

The present invention provides an adsorption device and an adsorption method, which utilize the characteristics of high mass transfer, high adsorption and high desorption recovery of the hollow fiber adsorption material in the hollow fiber adsorption unit to achieve the effects of low operating pressure and low energy consumption. The pressure change performs adsorption and desorption of the target gas, and continuously produces high-purity product gas.

According to an aspect of the present invention, an adsorption device is provided, which includes an air intake unit, an exhaust unit and at least two adsorption modules. The air intake unit is used for providing the mixed gas with a pressure higher than an atmospheric pressure, and the exhaust unit is used for providing a suction environment with a pressure lower than an atmospheric pressure. One of the adsorption modules is connected to the other adsorption module, and each adsorption module is connected to the air intake unit and the exhaust unit, and each adsorption module includes a pressure switching unit and a hollow fiber adsorption unit. The pressure switching unit is used to control the operating pressure of each adsorption module, and its operating pressure is high operating pressure or low operating pressure, wherein the high operating pressure is provided by the air intake unit, and makes each adsorption module perform air intake action, and the low operating pressure Provided by the exhaust unit, and make each adsorption module perform exhaust action. The hollow fiber adsorption unit is connected to the pressure switching unit, and includes at least one hollow fiber adsorption material, which is a tubular structure, and when the operating pressure is high, it adsorbs the mixed gas and generates product gas, and when the operating pressure is low, each hollow fiber adsorbs material for desorption regeneration.

The adsorption device according to the aforementioned aspect, wherein when the mixed gas passes through one of the adsorption modules, the mixed gas is adsorbed at a high operating pressure to generate a product gas, and the other adsorption module is desorbed at a low operating pressure Regenerate, and generate adsorbed gas, and the adsorbed gas is discharged from the exhaust unit.

According to the adsorption device of the aforementioned aspect, when one adsorption module reaches a preset adsorption value, the pressure switching unit of the other adsorption module switches the other adsorption module from the low operating pressure to the high operating pressure, and cooperates with one of the adsorption modules. The adsorption modules are all kept at high operating pressure, and after a transition time value, the pressure switching unit of one of the adsorption modules that reaches the preset adsorption value switches the high operating pressure to the low operating pressure.

According to the adsorption device of the aforementioned aspect, the high operating pressure may be greater than 1 atm; the low operating pressure may be lower than -300 mmHg.

The adsorption device according to the aforementioned aspect may further include a product gas outlet, which is connected to each adsorption module and allows the product gas to be discharged.

The adsorption device according to the aforementioned aspect may further include a flow control valve disposed between one adsorption module and another adsorption module, wherein the product gas discharged from one of the adsorption modules under high operating pressure passes through The flow control valve divides the flow to generate a stripping gas, which enters another adsorption module for regenerative stripping.

The adsorption device according to the aforementioned aspect may further include a heating element disposed between one adsorption module and another adsorption module, and used for heating the stripping gas.

According to the adsorption device of the aforementioned aspect, it may further include a plurality of airflow check elements, which are respectively disposed between one adsorption module and the other adsorption module.

According to the adsorption device of the aforementioned aspect, when the gas passes through each adsorption module, its flow direction can be perpendicular or parallel to the axial direction of each hollow fiber adsorption material.

According to the adsorption device of the aforementioned aspect, the placement of the adsorption device may be horizontal, vertical or at an angle with a horizontal plane.

According to the adsorption device of the aforementioned aspect, in each adsorption module, the hollow fiber adsorption material can include at least one channel, and the diameter of the opening of the channel is 50um-4000um.

According to the adsorption device of the aforementioned aspect, the diameter of each hollow fiber adsorption material is D1, and the diameter of the opening of each hollow fiber adsorption material is d1, which can satisfy the following conditions: 1<D1/d1<100.

According to an aspect of the present invention, an adsorption method is provided, which provides at least two adsorption modules and includes a first adsorption step, a second adsorption step, and a desorption step. The first adsorption step is to introduce the mixed gas into an adsorption module to provide the adsorption module with a high operating pressure and to generate product gas. In the second adsorption step, when the first adsorption step elapses for a predetermined time, the mixed gas is introduced into another adsorption module to provide the other adsorption module with a high operating pressure, and both the other adsorption module and the adsorption module are maintained. at high operating pressures and produces product gas. The desorption step is to switch the adsorption module from a high operating pressure to a low operating pressure after the second adsorption step performs a transitional time value, and introduce a flushing gas, and the flushing gas passes through the adsorption module to make the adsorption module Desorption regeneration, and discharge of adsorbed gas. When the preset time value has elapsed, the adsorption module is switched from the low operating pressure to the high operating pressure, so that the adsorption module can adsorb the mixed gas.

According to the adsorption method of the aforementioned aspect, each adsorption module may include at least one hollow fiber adsorption material, which has a tubular structure.

According to the adsorption method of the aforementioned aspect, the stripping gas may be generated by splitting the product gas.

The invention provides an adsorption device, which includes an air intake unit, an exhaust unit and at least two adsorption modules. The intake unit is used for providing mixed gas, and each adsorption module is connected to the intake unit and the exhaust unit and includes a first switching unit and a hollow fiber adsorption unit. The first switching unit is used for opening and closing the communication between each adsorption module, the intake unit and the exhaust unit. The hollow fiber adsorption unit is connected to the first switching unit and includes at least one hollow fiber adsorption material, which is a tubular structure. When the air intake unit communicates with each adsorption module, each adsorption module adsorbs the mixed gas; when the exhaust unit communicates with each adsorption module, each adsorption module performs desorption and regeneration.

According to the adsorption device of the aforementioned aspect, when the air intake unit is communicated with an adsorption module, and the mixed gas is passed through an adsorption module, the adsorption module adsorbs the mixed gas and generates a product gas. Another adsorption module communicates with the exhaust unit and performs desorption and regeneration to generate adsorbed gas.

According to the adsorption device of the aforementioned aspect, when one adsorption module reaches a preset adsorption value, the first switching unit of the other adsorption module opens the communication between the other adsorption module and the air intake unit, and at a transition time After the value is set, the first switching unit of the adsorption module closes the communication between the adsorption module and the air intake unit, and opens the communication between the adsorption module and the exhaust unit.

The adsorption device according to the aforementioned aspect may further include a product gas outlet, which is connected to each adsorption module and discharges the product gas, and includes an air extraction device, which is used to pass the mixed gas through each adsorption module and used for The extracted product gas is discharged to each adsorption module.

According to the adsorption device of the aforementioned aspect, each adsorption module may further include a second switching unit, which is connected to each hollow fiber adsorption unit and used to provide each adsorption module with a stripping gas, so that each adsorption module can be desorbed regeneration.

According to the adsorption device of the aforementioned aspect, when the gas passes through each adsorption module, its flow direction can be perpendicular or parallel to the axial direction of each hollow fiber adsorption material.

According to the adsorption device of the aforementioned aspect, the adsorption device can be arranged horizontally, vertically or at an angle with a horizontal plane.

According to the adsorption device of the aforementioned aspect, in each adsorption module, the hollow fiber adsorption material can include at least one channel, and the diameter of the opening of the channel is 50um-4000um.

According to the adsorption device of the aforementioned aspect, the diameter of each hollow fiber adsorption material is D1, and the diameter of the opening of each hollow fiber adsorption material is d1, which can satisfy the following conditions: 1<D1/d1<100.

100, 200, 300: adsorption device

110, 210, 310: The first adsorption module

111, 211: The first pressure switching unit

311, 321: the first switching unit

112, 212, 312: the first hollow fiber adsorption unit

113, 123, 313, 323: first open end

114, 124, 314, 324: second open end

115, 115a, 215, 315: the first hollow fiber adsorbent

116, 116a: channel

117, 117a: Opening

120, 220, 320: The second adsorption module

121, 221: The second pressure switching unit

122, 222, 322: the second hollow fiber adsorption unit

125, 225, 325: the second hollow fiber adsorbent

140, 240, 340: Exhaust unit

141, 241, 341: discharge port

150, 250, 350: product gas outlet

351: Air extraction device

151: The first divergence point

152: Second divergence point

160, 260: flow control valve

181, 182: Airflow check element

290: Heating element

400: first adsorption step

500: Second adsorption step

600: Desorption step

t1: preset time value

t2: Transition time value

G: mixed gas

P: Product gas

A: Adsorbed gas

E: flushing gas

F1: Parallel direction

F2: vertical direction

D1: The diameter of the first hollow fiber adsorbent

316, 326: the second switching unit

130, 230, 330: intake unit

d1: opening diameter

T1, T2, T3, T4: Period

Figure 1 shows a schematic diagram of an adsorption device according to an embodiment of the present invention; Figure 2 shows an adsorption curve diagram of the adsorption device according to the embodiment of Figure 1; Figure 3 shows adsorption according to another embodiment of the present invention Figure 4 shows a schematic diagram of the airflow of the first hollow fiber adsorption material according to the embodiment of Figure 1; Figure 5A shows the first hollow fiber adsorption material according to the embodiment of Figure 1. An enlarged perspective view; FIG. 5B shows a schematic cross-sectional view of the first hollow fiber adsorbent according to the embodiment of FIG. 5A ; FIG. 6A illustrates an enlarged perspective view of the first hollow fiber adsorbent according to another embodiment of the present invention; Figure 6B shows a schematic cross-sectional view of the first hollow fiber adsorption material according to the embodiment of Figure 6A; Figure 7 shows a schematic diagram of the arrangement of the adsorption device according to the embodiment of Figure 1; Figure 8 shows the implementation according to Figure 1 Figure 9 shows a flow chart of an adsorption method according to another embodiment of the present invention; and Figure 10 shows a schematic diagram of an adsorption device according to another embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. For the sake of clarity, many practical details are set forth in the following description. The reader should understand, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, to simplify the drawings, some well-known and conventional structures and elements will be shown in a simplified and schematic manner in the drawings; and repeated elements may be denoted by the same or similar numerals.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an adsorption device 100 according to an embodiment of the present invention. As can be seen from the embodiment in FIG. 1, the adsorption device 100 includes an air intake unit 130, an exhaust unit 140, and at least two adsorption modules. In this embodiment, the adsorption device 100 includes two adsorption modules, which are the first The adsorption module 110 and the second adsorption module 120, but the invention is not limited to this. The intake unit 130 is used to provide a mixed gas G with a pressure higher than an atmospheric pressure, and the exhaust unit 140 is used to provide a suction environment with a pressure lower than an atmospheric pressure. The first adsorption module 110 is connected to the second adsorption module 120 , and the first adsorption module 110 and the second adsorption module 120 are both connected to the intake unit 130 and the exhaust unit 140 .

The first adsorption module 110 includes a first pressure switching unit 111 and a first hollow fiber adsorption unit 112 , and the second adsorption module 120 includes a second pressure switching unit 121 and a second hollow fiber adsorption unit 122 . The first pressure switching unit 111 is used to control the operating pressure of the first adsorption module 110, and the second pressure switching unit 121 is used to control the operating pressure of the second adsorption module 120, and the operating pressure is a high operating pressure or a low operating pressure , wherein the high operating pressure is provided by the air intake unit 130 and causes the first adsorption module 110 and the second adsorption module 120 to perform air intake action; while the low operating pressure is provided by the exhaust unit 140 and causes the first adsorption module The group 110 and the second adsorption module 120 perform the exhaust operation.

The first hollow fiber adsorption unit 112 and the second hollow fiber adsorption unit 122 are respectively connected to the first pressure switching unit 111 and the second pressure switching unit 121, and the first hollow fiber adsorption unit 112 includes at least one first hollow fiber adsorption material 115, The second hollow fiber adsorption unit 122 includes at least one The second hollow fiber adsorption material 125, wherein the first hollow fiber adsorption material 115 and the second hollow fiber adsorption material 125 are both tubular structures, and adsorb the mixed gas G when the operating pressure is high, and the first hollow fiber adsorption material when the operating pressure is low. The first hollow fiber adsorbent 115 and the second hollow fiber adsorbent 125 are desorbed and regenerated.

With the above configuration, the adsorption device 100 can switch the operating pressures of the first pressure switching unit 111 and the second pressure switching unit 121 to make the first adsorption module 110 and the second adsorption module 120 perform adsorption or desorption respectively and simultaneously. For example, when the first adsorption module 110 performs adsorption, the second adsorption module 120 can simultaneously perform desorption and regeneration, and can alternately cycle for adsorption and desorption regeneration. In this way, the adsorption device 100 can continuously and uninterruptedly generate purified gas, and through the arrangement of the tubular first hollow fiber adsorption material 115 and the second hollow fiber adsorption material 125, the energy consumption and improvement of the adsorption device 100 can be reduced. The capacity of the adsorption device 100 to purify the gas.

It should be noted here that this embodiment takes the adsorption of water molecules as an example, but according to different operational requirements, the present invention can be matched with the characteristics of different hollow fiber adsorbents to adsorb different target gases, but the present invention does not This is limited, and please refer to the airflow direction indicated by the arrow in Figure 1, which is defined as a forward operation. The embodiment in Figure 1 can also be operated in the reverse direction, and the airflow direction shown by the arrow in the reverse operation is the same as The direction of the forward operation is symmetrical and opposite, and the forward operation will be described in detail below.

In detail, the air intake unit 130 can be a gas compressor, and a gas containing water (not shown) is compressed by the air intake unit 130 to form a mixed gas G with a pressure higher than an atmospheric pressure, and the mixed gas G is delivered to the first The pressure switching unit 111, the first pressure switching unit 111 controls the mixed gas G to enter the first hollow fiber adsorption unit 112, wherein the first pressure switching unit 111 can be a solenoid valve, but not limited thereto.

The mixed gas G passes through the first adsorption module 110 to raise the first adsorption module 110 to a high operating pressure, and the first adsorption module 110 adsorbs the mixed gas G and generates a product gas P under the high operating pressure. More specifically, the mixed gas G passes through the first hollow fiber adsorption unit 112 from the first open end 113 of the first adsorption module 110 toward the second open end 114 , and the mixed gas is absorbed by the tubular first hollow fiber adsorption material 115 . The water molecules in G are adsorbed to form anhydrous and dry product gas P, which leaves the first hollow fiber adsorption unit 112 from the second open end 114 .

The adsorption device 100 may further include a product gas outlet 150, which is connected to the first adsorption module 110 and the second adsorption module 120, and allows the product gas P to be directly discharged, or discharged into a gas storage device (such as a barrel, not shown in the figure). Show). The adsorption device 100 may further include a flow control valve 160 disposed between the first adsorption module 110 and the second adsorption module 120, wherein the product gas P discharged from the first adsorption module 110 under high operating pressure , the flow is split through the flow control valve 160 to generate a flushing gas E, which enters the second adsorption module 120 , so that the second adsorption module 120 is regenerated and flushed. In more detail, after the product gas P leaves the first hollow fiber adsorption unit 112 from the second open end 114, a part of the product gas P is diverted from the first branch point 151 to the product gas outlet 150 for discharge, and the other part of the product gas is discharged. P is split through the flow control valve 160 and enters the second adsorption module 120 through the second branch point 152 . Specifically, flow control The valve 160 can control the stripping gas E to be 3%-7% of the product gas P, thereby effectively reducing the consumption of the product gas P.

When the mixed gas G passes through the first adsorption module 110 and adsorbs the mixed gas G under a high operating pressure, the second adsorption module 120 performs desorption and regeneration under a low operating pressure to generate an adsorbed gas A , the adsorbed gas A is discharged from the exhaust unit 140 . Specifically, the second hollow fiber adsorption material 125 in the second hollow fiber adsorption unit 122 has adsorbed water molecules and reaches a preset adsorption value, and the flushing gas E flows from the second hollow fiber adsorption unit through the flow control valve 160 The second open end 124 of the 122 passes toward the first open end 123, and takes away the adsorbed water molecules in the second hollow fiber adsorption material 125, and makes the second adsorption module 120 perform desorption and regeneration under low operating pressure. . It is worth mentioning that the stripping gas E strips the second hollow fiber adsorption unit 122 from the second open end 124 toward the first open end 123. The advantage is that the airflow direction of the stripping gas E is the same as that of the mixed gas G during adsorption. The flow direction is opposite, thereby avoiding repeated contamination of the non-adsorbed blocks in the second hollow fiber adsorption unit 122 by the adsorbed gas A with moisture.

In addition, the exhaust unit 140 can be a vacuum pump, but the present invention is not limited to this, and applies a vacuum force to provide a vacuuming environment below an atmospheric pressure. The second pressure switching unit 121 controls the exhaust unit 140 to apply a vacuum force to the second hollow fiber adsorption unit 122 , and the adsorbed gas A in the second hollow fiber adsorption unit 122 passes through the second pressure switching unit 121 and is received by the exhaust unit 140 The vacuum force is drawn and discharged to the discharge port 141 .

The above-mentioned high operating pressure may be greater than 1 atm, and the low operating pressure may be lower than -300 mmHg, but the present invention is not limited thereto.

It can be seen from the above description that when the first adsorption module 110 adsorbs the mixed gas G under a high operating pressure, the second adsorption module 120 performs desorption and regeneration under a low operating pressure. After the first adsorption module 110 performs adsorption and reaches the preset adsorption value, the second pressure switching unit 121 of the second adsorption module 120 switches the second adsorption module 120 from a low operating pressure to a high operating pressure, and the first The adsorption modules 110 maintain high operating pressure, and after a transition time value, the first pressure switching unit 111 of the first adsorption module 110 switches the high operating pressure to the low operating pressure.

In addition, the above-mentioned preset adsorption value can be adjusted according to the operation requirements of the adsorption device 100 , and the preset adsorption value can be a value close to the adsorption saturation of the first adsorption module 110 or has reached adsorption saturation.

Specifically, when the first hollow fiber adsorption unit 112 reaches the preset adsorption value, at this time, the second hollow fiber adsorption unit 122 also completes desorption and regeneration, and the second pressure switching unit 121 turns on the second hollow fiber adsorption unit 122 and The air inlet unit 130 is communicated, so that the mixed gas G enters from the first open end 123 of the second hollow fiber adsorption unit 122, and the operating pressure of the second hollow fiber adsorption unit 122 is increased from a low operating pressure to a high operating pressure, The mixed gas G passes through the second hollow fiber adsorption unit 122 from the first open end 123 to the second open end 124 to adsorb water molecules in the mixed gas G and generate product gas P. That is to say, at this time, both the first adsorption module 110 and the second adsorption module 120 are kept at a high operating pressure, and the mixed gas G enters the first adsorption module 110 and the second adsorption module 120 at the same time, so that the first adsorption module 110 and the second adsorption module 120 are adsorbed at the same time. The module 110 and the second adsorption module 120 simultaneously generate the product gas P and discharge it to the product gas outlet 150 .

After a transition time value t2, the first pressure switching unit 111 closes the communication between the first hollow fiber adsorption unit 112 and the air intake unit 130, stops the mixed gas G from entering the first hollow fiber adsorption unit 112, and starts the first hollow fiber adsorption unit 112. The unit 112 is in communication with the exhaust unit 140. The exhaust unit 140 applies a vacuum force to the first adsorption module 110, so that the operating pressure of the first adsorption module 110 is reduced from a high operating pressure to a low operating pressure. Module 110 begins desorption regeneration at low operating pressure. Specifically, the transition time value t2 is a time value when the operating pressure of the second adsorption module 120 is stabilized, that is, the operating pressure of the second adsorption module 120 is completely converted from the low operating pressure to the high operating pressure, and The time value required to stabilize at high operating pressure, and the transition time value t2 can be adjusted according to different operating requirements.

Through the above operations, the first adsorption module 110 and the second adsorption module 120 are switched, and the second adsorption module 120 adsorbs the mixed gas G while the first adsorption module 110 performs desorption and regeneration. It is worth mentioning that, within the transition time value t2, the first adsorption module 110 and the second adsorption module 120 maintain the intake of the mixed gas G at the same time, and jointly produce the product gas P, so that the continuous supply of the product gas can be achieved. P, will not cause instantaneous pressure drop and gas cut-off problems due to the switching process.

To sum up, the first adsorption module 110 and the second adsorption module 120 can be switched with each other for adsorption or desorption regeneration, and are alternated in a continuous cycle, thereby achieving continuous and uninterrupted production of high-purity product gas P. effect.

Please refer to FIG. 2 and Table 1 below. FIG. 2 shows the adsorption curve of the adsorption device 100 according to the embodiment of FIG. 1, and Table 1 records the time period T1 and the time period T2 of the adsorption device 100 in the embodiment of FIG. 1 respectively. , the operating pressure of the period T3 and the period T4, the flow rate of the product gas outlet 150 and the parameter values of the flow ratio of the stripping gas E and the product gas P. Specifically, the adsorption curve in Figure 2 is the adsorption curve of the adsorption device 100 according to the embodiment in Figure 1 under the operating conditions in Table 1 for adsorbing water molecules, and it can be seen from Figure 2 that the operating pressure of the adsorption device 100 Under the operating conditions that the flow rate of the product gas outlet is 2Kg/cm ² , the flow rate of the product gas outlet is 70LPM, and the flow rate ratio of the purge gas E to the product gas P is 6.6%, the product gas P with a dew point of -40°C can be obtained. Compared with the traditional adsorption The device requires extremely high pressure (7Kg/cm ² ~15Kg/cm ² ) and 10%~30% product gas consumption to obtain product gas with a dew point of -40°C. The adsorption device 100 of the embodiment in Figure 1 passes through the first The arrangement of the hollow fiber adsorption material 115 and the second hollow fiber adsorption material 125 can obtain a product gas P with a low dew point under a relatively low operating pressure and a relatively low amount of stripping gas. Therefore, compared with the traditional adsorption device , the adsorption device 100 of the present invention can further achieve the effect of low energy consumption.

In addition, the adsorption device 100 may further include a plurality of airflow check elements 181 and 182 , which are respectively disposed between the first adsorption module 110 and the second adsorption module 120 . In detail, the airflow check element 181 is arranged between the first hollow fiber adsorption unit 112 and the product gas outlet 150 , and the airflow check element 182 is arranged between the second hollow fiber adsorption unit 122 and the product gas outlet 150 . The arrangement of the airflow check elements 181 and 182 can prevent the gas from flowing back and pollute the product gas P or each adsorption module.

Please refer to FIG. 3 , which is a schematic diagram of an adsorption device 200 according to another embodiment of the present invention. The adsorption device 200 includes an air intake unit 230 , an exhaust unit 240 , a first adsorption module 210 and a second adsorption module 220 . It should be noted here that the structure, configuration and operation method of the adsorption device 200 are the same as those of the adsorption device 100 of the embodiment in FIG. 1. Please refer to the adsorption device 100 of the embodiment in FIG. Further details. The difference between the adsorption device 200 and the adsorption device 100 is that the adsorption device 200 may further include a heating element 290 disposed between the first adsorption module 210 and the second adsorption module 220 and used for heating the elution gas E.

More specifically, in FIG. 3, the first pressure switching unit 211 controls the first adsorption module 210 to a high operating pressure, and the second pressure switching unit 221 controls the second adsorption module 220 to a low operating pressure. The mixed gas G passes through the first adsorption module 210 , and the first hollow fiber adsorption unit 212 of the first adsorption module 210 adsorbs the mixed gas G to generate product gas P, which is discharged from the product gas outlet 250 . In addition, the product gas P is split to generate a flushing gas E, and the flushing gas E flows to the second adsorption module 220 through the flow control valve 260. Before entering the second adsorption module 220, the flushing gas E flows through the heating element 290, The heating element 290 heats the flushing gas E, and by increasing the temperature of the flushing gas E, the effect of desorption and regeneration of the second hollow fiber adsorption unit 222 of the second adsorption module 220 can be better, so that the second adsorption module The second hollow fiber adsorption unit 222 of 220 has a higher desorption amount of water molecules within a certain period of time, and the adsorbed gas A passes through the second pressure switching unit 221, is drawn by the vacuum force of the exhaust unit 240, and is discharged to the discharge port 241. With the above configuration, the overall operation efficiency of the adsorption device 200 can be improved.

Please refer to Fig. 4, Fig. 5A, Fig. 5B, Fig. 6A and Fig. 6B, Fig. 4 shows a schematic diagram of the airflow of the first hollow fiber adsorbent 115 according to the embodiment of Fig. 1, and Fig. 5A shows FIG. 1 is an enlarged perspective view of the first hollow fiber adsorption material 115 according to the embodiment of FIG. 1 , FIG. 5B is a schematic cross-sectional view of the first hollow fiber adsorption material 115 according to the embodiment of FIG. 5A , and FIG. 6A is a schematic diagram according to the present invention. FIG. 6B is an enlarged perspective view of the first hollow fiber adsorbent 115a according to another embodiment, and FIG. 6B is a schematic cross-sectional view of the first hollow fiber adsorbent 115a according to the embodiment of FIG. 6A.

It is worth mentioning that the hollow fiber adsorption material used in the present invention is a porous tubular adsorption material, which has the advantages of high mass transfer, high adsorption efficiency, high desorption efficiency and no pulverization. describe its structure.

In particular, the structures of the first hollow fiber adsorption material 115 and the second hollow fiber adsorption material 125 in the adsorption device 100 and the first hollow fiber adsorption material 215 and the second hollow fiber adsorption material 225 in the adsorption device 200 can be In order to be the same, the first hollow fiber adsorption material 115 and the first hollow fiber adsorption material 115a are only represented in the embodiment in FIGS. 4 and 5A and in the embodiment in FIG. 6A, which can be replaced or combined with each other. This is the limit.

It can be seen from FIG. 5A and FIG. 6A that the first hollow fiber adsorbents 115 and 115a include at least one channel 116 and 116a, and one opening 117 and 117a of the channel 116 and 116a has a diameter of 50um to 4000um, wherein the openings 117 and 117a It is provided corresponding to the holes 116 and 116a. The diameter of the first hollow fiber adsorbents 115, 115a is D1, and the diameter of the openings 117, 117a of the channels 116, 116a is d1, which can satisfy the following conditions: 1<D1/d1<100, that is, the first hollow fiber The adsorbents 115, 115a and the openings 117, 117a have high specific surface areas, which help to increase the efficiency of adsorption and desorption regeneration. Specifically, the first hollow fiber adsorbent 115 may include a channel 116 and an opening 117, as shown in FIG. 5A and FIG. 5B; or as shown in the first hollow fiber adsorbent 115a in FIG. 6A It includes a plurality of holes 116a and a plurality of openings 117a corresponding to the holes 116a. In addition, the first hollow fiber adsorption material 115 can be assembled into a bundle in a quantity required for operation, placed in a pressure-resistant container, and formed into a first hollow fiber adsorption unit 112, which can be cylindrical, rectangular or other shapes.

Please refer to Figure 4 again, the arrows in the figure show the flow direction of the gas, the parallel direction F1 is the gas flow direction parallel to the axial direction of each hollow fiber adsorbent, and the vertical direction F2 is perpendicular to the axial direction of each hollow fiber adsorbent. In other words, the gas flows through each adsorption module, and its flow direction can be vertical or parallel to the axial direction of each hollow fiber adsorption material, wherein, the gas can be mixed gas G, product gas P, adsorbed gas A or flushing Lift gas E. In detail, through the porosity of the hollow fiber adsorbent material, when the gas passes through the tubular first hollow fiber adsorbent material 115, the gas flow direction can be through the channel 116 from bottom to top and top to bottom, as shown in the parallel direction F1; Or with a horizontal airflow, such as vertical As shown in the straight direction F2, the pores on the surface of the first hollow fiber adsorption material 115 are used to pass from the inside to the outside or from the outside to the inside of the first hollow fiber adsorption material 115 to perform adsorption and filtration. When the mixed gas G of water molecules passes through the channels 116 of the first hollow fiber adsorbent 115 from bottom to top along the parallel direction F1, as shown in FIG. When the axial direction of the first hollow fiber adsorbent 115 is advanced, water molecules can be attracted by the first hollow fiber adsorbent 115 and adsorbed along the vertical direction F2 , thereby removing water molecules from the mixed gas G and forming a product gas P.

FIG. 7 shows a schematic diagram of the arrangement of the adsorption device 100 according to the embodiment of FIG. 1 , and FIG. 8 shows another schematic diagram of the arrangement of the adsorption device 100 according to the embodiment of FIG. 1 . As can be seen from the above description and in conjunction with FIGS. 7 and 8, the gas can be filtered and adsorbed through the first hollow fiber adsorption material 115 in any direction, and compared with the traditional adsorption material (such as zeolite), which is granular, the first hollow fiber adsorption material 115 is a solid structure, through this feature, the placement of the adsorption device 100 can be horizontal (as shown in FIG. 8 ), vertical (as shown in FIG. 7 ) or at an angle to a horizontal plane, that is, The placement of the adsorption device 100 can be at any angle, thereby overcoming the limitation that the conventional adsorption material can only be placed vertically, and increasing the flexibility of the adsorption device 100 in use.

Please refer to FIG. 9. FIG. 9 shows a flowchart of an adsorption method according to another embodiment of the present invention. The adsorption method provides at least two adsorption modules (not shown), and includes a first adsorption step 400, a second adsorption step 400, and a second adsorption module. Adsorption step 500 and desorption step 600 . It should be noted here that the adsorption method can be applied to the adsorption device 100 of the embodiment in FIG. 1. Therefore, the following detailed description of the adsorption method Taking the application to the adsorption device 100 as an example, please refer to the drawings and labels of the adsorption device 100 of the embodiment in FIG. 1 , but the present invention is not limited thereto. The first adsorption step 400 is to introduce the mixed gas G into the first adsorption module 110 to provide the first adsorption module 110 with a high operating pressure, and to generate the product gas P. The second adsorption step 500 is to introduce the mixed gas G into the second adsorption module 120 after the first adsorption step 400 has elapsed for a predetermined time value t1 to provide the second adsorption module 120 with a high operating pressure, the second adsorption module 120 and the first adsorption module 110 are both maintained at high operating pressure and produce product gas P. In the desorption step 600, after the transition time t2 in the second adsorption step 500 is performed, the first adsorption module 110 in the first adsorption step 400 is switched from a high operating pressure to a low operating pressure, and a purge gas E is introduced, The stripping gas E passes through the first adsorption module 110 to desorb and regenerate the first adsorption module 110 and discharge the adsorbed gas A. When the preset time value t1 elapses, the first adsorption module 110 is switched from the low operating pressure to the high operating pressure, so that the first adsorption module 110 adsorbs the mixed gas G. Through the above steps, the first adsorption module 110 and the second adsorption module 120 can alternately and cyclically perform the first adsorption step 400 , the second adsorption step 500 and the desorption step 600 . That is to say, the first adsorption module 110 and the second adsorption module 120 can alternately and cyclically perform adsorption or desorption regeneration, thereby producing the product gas P continuously and uninterruptedly.

Specifically, when the first adsorption module 110 performs adsorption and produces the product gas P, the second adsorption module 120 performs desorption and regeneration at the same time. Within the value t2, the first adsorption module 110 and the second adsorption module 120 perform adsorption at the same time, and produce the product gas P at the same time. After the transition time value t2, the first adsorption module 110 is used instead. After desorption and regeneration, the second adsorption module 120 performs adsorption and alternately circulates in the above-mentioned method.

In addition, the predetermined time value t1 is a time value for the adsorption module performing adsorption to reach a predetermined adsorption value. The transition time value t2 is a time value when the operating pressure of the adsorption module for desorption and regeneration is completely converted from a low operating pressure to a high operating pressure, wherein the preset time value t1 and the transition time value t2 can be adjusted according to different operating requirements .

In addition, the first adsorption module 110 includes at least one first hollow fiber adsorption material 115, and the second adsorption module 120 includes at least one second hollow fiber adsorption material 125, which has a tubular structure.

The flushing gas E can be generated by the splitting of the product gas P. In detail, the product gas P is discharged from the first adsorption module 110, and the flushing gas E is formed by splitting and enters the second adsorption module 120 for desorption. regeneration. And preferably, the stripping gas E is 3% to 7% of the product gas P, but the present invention is not limited to this.

Please refer to FIG. 10 , which is a schematic diagram of an adsorption device 300 according to still another embodiment of the present invention. The adsorption device 300 includes an air intake unit 330, an exhaust unit 340 and at least two adsorption modules. In the embodiment of FIG. 10, the adsorption device 300 includes two adsorption modules, which are a first adsorption module 310 and a second adsorption module respectively. group 320, but the present invention is not limited to this. The air intake unit 330 is used for providing a mixed gas G. The first adsorption module 310 and the second adsorption module 320 are respectively connected to the air intake unit 330 and the exhaust unit 340. The first adsorption module 310 includes a first switching unit 311 and a The first hollow fiber adsorption unit 312, the first hollow fiber adsorption unit 312 is connected to the first switching unit 311; the second adsorption module 320 includes the first switching unit 321 and the second hollow fiber adsorption unit 311. With the attached unit 322 , the second hollow fiber adsorption unit 322 is connected to the first switching unit 321 .

The first switching units 311 and 321 are used to open and close the communication between the first adsorption module 310 and the second adsorption module 320 and the air intake unit 330 and the exhaust unit 340 respectively. When the 310 or the second adsorption module 320 is connected, the first adsorption module 310 or the second adsorption module 320 adsorbs the mixed gas G; when the exhaust unit 340 is connected to the first adsorption module 310 or the second adsorption module 320 When connected, the first adsorption module 310 or the second adsorption module 320 performs desorption and regeneration.

With the above configuration, the first adsorption module 310 and the second adsorption module 320 of the adsorption device 300 can perform adsorption or desorption regeneration separately and simultaneously, thereby helping to improve the operation efficiency of the adsorption device 300 .

Specifically, please refer to the airflow direction shown by the arrow in Figure 10, which is defined as a forward operation. The embodiment in Figure 10 can also be operated in the reverse direction, and the airflow direction shown by the arrow in the reverse operation is in the same direction. It is symmetrical and opposite to the direction of operation, which will be described in detail below with forward operation. When the air intake unit 330 makes the mixed gas G pass through the first adsorption module 310 , the first adsorption module 310 adsorbs the mixed gas G to generate the product gas P. The second adsorption module 320 communicates with the exhaust unit 340 and performs desorption and regeneration to generate an adsorbed gas A.

The adsorption device 300 may further include a product gas outlet 350, which is connected to the first adsorption module 310 and the second adsorption module 320 and discharges the product gas P, and the product gas outlet 350 may include an air extraction device 351. 351 It is used to make the mixed gas G pass through the first adsorption module 310 and to extract the product gas P to be discharged from the first adsorption module 310 .

More specifically, the air intake unit 330 can be a storage tank at atmospheric pressure. When the first switching unit 311 of the first adsorption module 310 opens the communication between the air intake unit 330 and the first adsorption module 310, the air extraction device 351 When the first adsorption module 310 is pumped, the mixed gas G in the air intake unit 330 will be pumped by the vacuum force of the air extraction device 351, and the first open end 313 of the first adsorption module 310 will move toward the second adsorption module 310. The open end 314 passes through the first hollow fiber adsorption unit 312, and the tubular first hollow fiber adsorption material 315 further adsorbs the target gas (not shown) in the mixed gas G to form a product gas P, and the product gas P The product gas is directly discharged from the product gas outlet 350, or discharged into a gas storage device (such as a barrel tank, not shown in the figure).

While the first adsorption module 310 is adsorbing the mixed gas G, the first switching unit 321 of the second adsorption module 320 opens the communication between the second adsorption module 320 and the exhaust unit 340 to perform desorption and regeneration, and generates The adsorbed gas A is discharged from the discharge port 341 of the exhaust unit 340 .

The second adsorption module 320 may include a second switching unit 326, which is connected to the second hollow fiber adsorption unit 322 and used to provide the second adsorption module 320 with a purge gas E, so that the second adsorption module 320 can be desorbed Attached regeneration.

Specifically, one end of the second switching unit 326 is communicated with the product gas outlet 350, and the other end is communicated with the outside atmosphere or a gas tank (not shown), and a pure gas can be stored in the gas tank, that is, the second toggle The element 326 can choose to use the air in the outside atmosphere or the pure gas stored in the gas tank as the purging gas E according to the operation requirements, and in the embodiment of FIG. This disclosure is limited. When the second hollow fiber adsorption material 325 in the second hollow fiber adsorption unit 322 has adsorbed the target gas and has reached or is close to adsorption saturation, the second switching unit 326 opens the communication with the outside atmosphere, and the air in the outside atmosphere is used as the flushing gas E It passes through the second hollow fiber adsorption unit 322 from the top to the bottom from the second open end 324 of the second adsorption module 320 to the first open end 323, and takes away the target gas adsorbed in the second hollow fiber adsorption material 325, and Adsorbed gas A is produced. The second adsorption module 320 is desorbed and regenerated by the stripping gas E passing through the second hollow fiber adsorption unit 322, so as to restore the second adsorption module 320 to a state suitable for adsorption.

Furthermore, in order to make the elution gas E pass through the second adsorption module 320 more smoothly, the exhaust unit 340 can be a vacuum pump, and applies a vacuum force to the second hollow fiber adsorption unit 322, so as to make the elution gas E go through the second adsorption module 320 more smoothly. E passes through the second hollow fiber adsorption unit 322 from top to bottom from the second open end 324 of the second adsorption module 320 toward the first open end 323 . It is worth mentioning that the stripping gas E flows from the second open end 324 to the first open end 323 . The first open end 323 flushes the second hollow fiber adsorption unit 322. The advantage is that the flow direction of the flushing gas E is opposite to the flow direction of the mixed gas G during adsorption, thereby preventing the adsorbed gas A from repeatedly polluting the second hollow fibers. Blocks that are not adsorbed by the adsorption unit 322 .

As can be seen from the above description, when the first adsorption module 310 communicates with the intake unit 330 and adsorbs the mixed gas G, the second adsorption module 320 communicates with the exhaust unit 340 and performs desorption and regeneration. When the first adsorption module When 310 reaches a preset adsorption value, the first switching unit 321 of the second adsorption module 320 opens the communication between the second adsorption module 320 and the air intake unit 330, and after a transition time value t2, the first adsorption module The first switching unit 311 of 310 closes the communication between the first adsorption module 310 and the air intake unit 330 , and opens the communication between the first adsorption module 310 and the exhaust unit 340 .

More specifically, when the first hollow fiber adsorption unit 312 reaches the preset adsorption value, at this time, the second hollow fiber adsorption unit 322 also completes the desorption and regeneration, and the first switching unit 321 of the second adsorption module 320 turns on the second hollow fiber adsorption unit 322. The two adsorption modules 320 communicate with the air intake unit 330, the second switching unit 326 of the second adsorption module 320 stops the purge gas E entering the second adsorption module 320, and opens the communication with the product gas outlet 350, that is, That is to say, at this time, the mixed gas G enters the first adsorption module 310 and the second adsorption module 320 at the same time, and the product gas P is generated at the same time. After a transition time value t2, the first switching unit 311 of the first adsorption module 310 closes the communication between the first adsorption module 310 and the air intake unit 330, so that the mixed gas G stops entering the first adsorption module 310, and the first adsorption module 310 stops. The second switching unit 316 of an adsorption module 310 closes the communication between the first adsorption module 310 and the product gas outlet 350, and opens the communication with the outside atmosphere, so that the flushing gas E enters the first adsorption module 310, so that the The first adsorption module 310 performs desorption regeneration.

Through the above operations, the first adsorption module 310 and the second adsorption module 320 are switched, and the second adsorption module 320 adsorbs the mixed gas G, while the first adsorption module 310 performs desorption and regeneration. It is worth mentioning that, within the transition time value t2, the first adsorption module 310 and the second adsorption module 320 maintain the intake of the mixed gas G at the same time, and jointly produce the product gas P, so that It can achieve continuous supply of product gas P without causing instantaneous pressure drop and gas cut-off due to the switching process.

In addition, in order to operate the adsorption device 300 more conveniently, the first switching unit 311 and the second switching unit 316 of the first adsorption module 310 and the first switching unit 321 and the second switching unit 326 of the second adsorption module 320 can be It is a solenoid valve, but the present invention is not limited to this.

To sum up, the first adsorption module 310 and the second adsorption module 320 can be switched with each other for adsorption or desorption regeneration, and are alternated in a continuous cycle to achieve the effect of continuously producing high-purity product gas P. In addition, through the arrangement of the second switching units 316 and 326 , the first adsorption module 310 and the second adsorption module 320 can choose to use gas from different sources as the purging gas E, thereby improving the practicability of the adsorption device 300 . And help to improve the production capacity of the product gas P.

In addition, the structures of the first hollow fiber adsorbent 315 and the second hollow fiber adsorbent 325 of the adsorption device 300 of the embodiment in FIG. 10 can be the same as those shown in FIGS. 4 , 5A, 5B, 6A and 6B. The first hollow fiber adsorbents 115 and 115a in the figure are the same. For the detailed structure description of the first hollow fiber adsorbent 315 and the second hollow fiber adsorbent 325, please refer to the foregoing content, and will not be repeated here.

Although the present disclosure has been disclosed above with examples, it is not intended to limit the present disclosure. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the scope of the appended patent application.

100‧‧‧Adsorption device

110‧‧‧First adsorption module

111‧‧‧First Pressure Switching Unit

112‧‧‧First hollow fiber adsorption unit

113, 123‧‧‧First open end

114, 124‧‧‧Second open end

115‧‧‧The first hollow fiber adsorbent

120‧‧‧Second adsorption module

121‧‧‧Second pressure switching unit

122‧‧‧Second hollow fiber adsorption unit

125‧‧‧Second hollow fiber adsorbent

130‧‧‧Intake unit

140‧‧‧Exhaust unit

141‧‧‧Drain

150‧‧‧Product gas outlet

151‧‧‧First point of divergence

152‧‧‧Second point of divergence

160‧‧‧Flow Control Valve

181, 182‧‧‧Airflow check element

G‧‧‧Mixed gas

P‧‧‧Product Gas

A‧‧‧Adsorbed gas

E‧‧‧Cushioning gas

Claims (11)

An adsorption device, comprising: an air intake unit for providing a mixed gas with a pressure higher than an atmospheric pressure; an exhaust unit for providing a suction environment with a pressure lower than an atmospheric pressure; and at least two adsorption molds set, wherein one of the adsorption modules is connected to the other adsorption module, and each of the adsorption modules is connected to the air intake unit and the exhaust unit and includes: a pressure switching unit for controlling one of the adsorption modules Operating pressure, the operating pressure is a high operating pressure or a low operating pressure, wherein the high operating pressure is provided by the air intake unit, and makes each adsorption module perform air intake action, and the low operating pressure is provided by the exhaust unit provide, and make each of the adsorption modules perform exhaust action; and a hollow fiber adsorption unit, connected to the pressure switching unit, and comprising: at least one hollow fiber adsorption material, which is a tubular structure, and when the high operating pressure, The mixed gas is adsorbed and a product gas is generated; at the low operating pressure, the hollow fiber adsorption material is desorbed and regenerated; wherein the at least one hollow fiber adsorption material comprises at least one channel, and the at least one hollow fiber adsorption material is The diameter is D1, the at least one The diameter of an opening of the channel of the hollow fiber adsorption material is d1, which satisfies the following conditions: 1<D1/d1<100; when one of the adsorption modules reaches a preset adsorption value, the other adsorption module has a diameter of d1. The pressure switching unit switches the other adsorption module from the low operating pressure to the high operating pressure, and maintains the high operating pressure with the adsorption module, and reaches the preset after a transition time value The pressure switching unit of the adsorption module of the adsorption value switches the high operating pressure to the low operating pressure. The adsorption device as described in claim 1, wherein when the mixed gas passes through one of the adsorption modules, and the mixed gas is adsorbed at the high operating pressure, the product gas is generated, and another adsorption The module is desorbed and regenerated under the low operating pressure, and an adsorbed gas is generated, and the adsorbed gas is discharged from the exhaust unit. The adsorption device as described in claim 1, wherein the high operating pressure is greater than 1 atm, and the low operating pressure is less than -300 mmHg. The adsorption device as described in item 1 of the scope of the patent application further comprises a product gas outlet, which is connected to each of the adsorption modules and discharges the product gas. The adsorption device as described in claim 1 of the claimed scope further comprises a flow control valve disposed between the adsorption module and the other adsorption module; wherein, the adsorption module from the high operating pressure The exhausted product gas is split through the flow control valve to generate a stripping gas, which enters the other adsorption module for regeneration and stripping. The adsorption device as described in item 1 of the claimed scope further comprises: a plurality of airflow check elements, which are respectively disposed between the adsorption module and the other adsorption module. According to the adsorption device described in claim 1, when a gas passes through each of the adsorption modules, its flow direction is perpendicular or parallel to the axial direction of each of the hollow fiber adsorption materials. The adsorption device as described in claim 7, wherein the adsorption device is arranged horizontally, vertically or at an angle with a horizontal plane. The adsorption device according to claim 1, wherein in each adsorption module, the diameter of the opening of the channel of the hollow fiber adsorption material is 50um-4000um. An adsorption method, comprising: providing at least two adsorption modules; a first adsorption step, introducing a mixed gas into one of the adsorption modules, providing the adsorption module with a high operating pressure, and generating a product gas; a second In the adsorption step, when the first adsorption step elapses for a preset time value, the mixed gas is introduced into another adsorption module to provide the other adsorption module with the high operating pressure, the other adsorption module and the adsorption module are both maintained at the high operating pressure to generate the product gas; and a desorption step, when the second adsorption step performs a transition time value, the adsorption module is switched from the high operating pressure to A low operating pressure is introduced, and a purge gas is introduced, and the purge gas passes through the adsorption module, so that the adsorption module is desorbed and regenerated, and an adsorbed gas is discharged; when the preset time value elapses, the The adsorption module is switched from the low operating pressure to the high operating pressure, so that the adsorption module can adsorb the mixed gas; wherein each adsorption module includes at least one hollow fiber adsorption material, which is in a tubular structure, and the at least one The hollow fiber adsorption material comprises at least one channel, the diameter of the at least one hollow fiber adsorption material is D1, and the at least one hollow fiber adsorption material is The diameter of an opening of the hole in the attachment is d1, which satisfies the following conditions: 1<D1/d1<100. The adsorption method as described in claim 10, wherein the stripping gas is generated by splitting the product gas.

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