KR200328337Y1 - Rotary Valve System for Air Separation System by Pressure Swing Adsorption - Google Patents

Abstract

The present invention relates to a rotary valve system for an air separation device by a PSA (Pressure Swing Adsoption) method.

The present invention has a circular cylindrical shape having a horizontal cross section perpendicular to the axis of rotation, and a compressed air supply passage 106 serving as an inlet passage of compressed air, and an exhaust passage 108 serving as a discharge passage of gas generated during regeneration of the adsorption tower. And having a horizontal cross section perpendicular to the axis of rotation being smaller than the cross section of the lower structure 102 attached to the upper portion of the lower structure 102 and receiving a driving force from the driving shaft 204. A rotary valve 100 including an upper structure 104 having a drive shaft receiving portion 116; And regeneration of the adsorption tower and the adsorption port plate 144 having a compressed air supply port 126 receiving compressed air and one or more adsorption ports 142 for delivering compressed air to the adsorption tower and receiving gas generated during regeneration of the adsorption tower. In the PSA method characterized in that it comprises a housing including one or more discharge port 150 for discharging the gas generated at the time and the drive shaft 204 and the insertion portion for connecting the rotary valve 100 and the drive shaft 204 It provides a rotary valve system for an air separation device.

Description

Rotary Valve System for Air Separation System by PSA {Rotary Valve System for Air Separation System by Pressure Swing Adsorption}

The present invention relates to a rotary valve system for an air separation device by a PSA (Pressure Swing Adsorption: "PSA") method. More specifically, compressed air is supplied to an adsorption bed in an adsorption process, compressed air is supplied to a rotary valve and a rotary valve that collects and discharges gas generated from the adsorption tower in a regeneration process to the outside. The present invention relates to a rotary valve system comprising a housing that connects a rotary valve and an adsorption tower to discharge exhaust gas discharged through the outside.

In the past, Cryogenic Air Separation has been used to liquefy air to separate oxygen or nitrogen by separating oxygen or nitrogen from the air. However, the air separation method by cooling has the advantage of increasing the purity, but there is a disadvantage that the device configuration is complicated and expensive.

In contrast, in recent years, non-Cryogenic Air Separation such as a PSA method or a hollow fiber membrane (Membrane) method, which has a simple device configuration and can reduce equipment costs, is frequently used. Among these, the PSA method is a method of separating nitrogen and oxygen components in the air by using the selective adsorption capacity of the adsorbent such as Zeolite Molecular Sieve (ZMS), and the pressurization of one or more adsorption beds filled with the adsorbent, Adsorption, blowdown and purge are included. On the other hand, when CMS (Carbon Molecular Sieve) is used as the adsorbent in the PSA system, it is also possible to selectively adsorb carbon dioxide in the air.

In the case of separation of oxygen or nitrogen by the PSA method, two or more adsorption towers are generally used alternately. When oxygen is separated using two adsorption towers, while the adsorption of nitrogen and oxygen separation are carried out in one adsorption column, the other adsorption tower proceeds to remove the adsorbed nitrogen from the adsorbent. It is repeated repeatedly. Therefore, in order to effectively separate oxygen and nitrogen, the role of an air distribution valve that distributes compressed air to two adsorption towers and discharges nitrogen removed from the adsorption towers is important. In addition, when the number of adsorption towers is increased, continuous operation of the air distribution valve is greatly required in order to enable each adsorption tower to continuously perform processes such as pressurization, adsorption, depressurization, and purification.

Conventional PSA valves used in the oxygen and nitrogen separation device in the air is a solenoid (Solenoid) valve or a linear motion valve using a spool (Spool) and the like, using a method of compression swing using such a valve.

However, the solenoid valve is composed of a fixed iron core, a coil and a moving iron core to convert the electrical energy into mechanical energy to linearly move the valve, which causes mechanical noise due to mechanical valve shielding and requires an additional controller to control the valve. There was a problem.

In addition, the controller of the valve using the solenoid and the spool serves to increase the oxygen purity by precisely adjusting the air flow rate through the compression swing in the oxygen and nitrogen separation device in the air through the PSA method. However, since such adjustment requires a fine adjustment and adjustment time, there are problems such as impact after adjustment, possibility of change according to ambient temperature, and stability of the product accordingly.

On the other hand, as a way to solve this problem, the Republic of Korea Utility Model Model No. 20-0287428 proposed a disk-type air dispersion valve system. However, in this case, the upper and lower rotary plates are separated, which is complicated in structure, and the partition inside the rotary plate does not provide smooth air supply and discharge, and the number of adsorption towers that can be used is limited to two. There is this.

In addition, the conventional valve system shortens the motor life of the pump supplying the compressed air due to the discontinuous supply of compressed air, promotes abrasion of the blade or the head of the pump, and generates excessive vibration and noise. There is a problem.

In order to solve the above problems, the present invention is to provide a rotary valve system for continuous supply of compressed air to the adsorption tower and the continuous discharge of gas generated during regeneration in the adsorption tower as an air distribution device of the PSA device. do.

In addition, by separating the supply passage of the compressed gas and the exhaust passage of the gas generated in the adsorption tower to enable the separation of high-purity oxygen or nitrogen, it is possible to attach and use a plurality of adsorption tower motor and compression pump to supply compressed air at the same time It is an object of the present invention to provide a rotary valve system that can improve the durability of the.

1 is a schematic exploded perspective view of a rotary valve system according to a first embodiment of the present invention,

2 is a cross-sectional view of a rotary valve system according to a first preferred embodiment of the present invention,

3 is a cross-sectional view of the rotary valve in the rotary valve system according to the first embodiment of the present invention,

4 is a top plan view of a rotary valve in the rotary valve system according to the first embodiment of the present invention;

5 is a bottom plan view of a rotary valve in a rotary valve system according to a first embodiment of the present invention;

6 is a plan view of a compressed air supply port housing in a rotary valve system according to a first embodiment of the present invention;

7 is a side view of a compressed air supply port part housing in a rotary valve system according to a first embodiment of the present invention;

8 is a cross-sectional view showing a state in which a rotary valve is inserted into a compressed air supply port housing;

9 is a plan view of a suction port housing of a rotary valve system according to a first embodiment of the present invention;

10 is a side view of a suction port housing of a rotary valve system according to a first embodiment of the present invention;

11 is a view illustrating a state in which a rotary valve is inserted into a suction port housing;

12 is a view for explaining the operation of the rotary valve system according to a first embodiment of the present invention,

Figure 13a is a view showing the appearance of the rotary valve in the rotary valve system according to a second embodiment of the present invention,

Figure 13b is a top plan view of a rotary valve in the rotary valve system according to a second embodiment of the present invention,

14 is a cross-sectional view of a rotary valve in a rotary valve system according to a third embodiment of the present invention;

15 is a plan view of a lower structure of a rotary valve in a rotary valve system according to a third embodiment of the present invention;

16 is a plan view of a suction port housing in a rotary valve system according to a third embodiment of the present invention;

17 is a side view of the suction port housing in a rotary valve system according to a third embodiment of the present invention;

18A is a cross-sectional view of a compressed air supply port part housing in a rotary valve system according to a fourth embodiment of the present invention;

18B is a sectional view of the suction port housing 140 according to the fourth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: rotary valve 102: lower structure

104: upper structure 106: compressed air supply passage

108: exhaust passage 110: compressed air distribution unit

112: exhaust gas collecting portion 114: buffer groove

116: drive shaft housing 120: compressed air supply port housing

124: drive shaft insert 126: compressed air supply port

140: suction port housing 142: suction port

144: suction port plate 146: rotary valve guide cylindrical portion

148: cylinder for gas discharge 150: discharge port

In order to achieve the above object, the present invention, in a rotary valve system for an air separation device by the PSA method, a horizontal cross section perpendicular to the axis of rotation is formed in a cylindrical shape of a circular shape and serves as an inlet passage of compressed air A lower cross section 102 having a supply passage 106 and an exhaust passage 108 serving as a discharge passage of gas generated during regeneration of the adsorption tower, and a horizontal cross section perpendicular to the axis of rotation is smaller than the cross section of the lower structure 102. A rotary valve (100) including a top structure (104) attached as a structure to an upper portion of the bottom structure (102) and having a drive shaft receiving portion (116) to receive driving force from the drive shaft (204); And an adsorption port plate 144 having a compressed air supply port 126 for receiving compressed air, one or more adsorption ports 142 for delivering compressed air to the adsorption tower and receiving gas generated when the adsorption tower is regenerated. It characterized in that it comprises a housing including one or more discharge port 150 for discharging the gas generated during the regeneration of the outside and the drive shaft 204 insert for connecting the drive shaft 204 and the rotary valve 100 Provides a rotary valve system.

Rotary valve system according to the present invention is composed of a housing (Housing) that allows the rotary valve to rotate about the same axis by embedding the rotary valve and the rotary valve. The housing is provided with a compressed air supply port (Port) through which compressed air is input. In addition, the housing is provided with an adsorption port for connecting the compressed air supply passage or the exhaust passage of the rotary valve and the adsorption tower, and an exhaust port for discharging gas generated during regeneration of the adsorption tower.

On the other hand, the rotary valve is provided with a cylindrical lower cylindrical structure having a horizontal cross section of the shaft core and a cylindrical upper structure whose diameter of the horizontal cross section of the shaft core is smaller than the diameter of the lower cross section. The lower structure of the rotary valve is provided with a compressed air supply passage for supplying compressed air to the adsorption tower and an exhaust passage for discharging the gas discharged from the adsorption tower to the outside. The upper structure of the rotary valve is provided with a drive shaft receiving portion connected to the drive shaft of the rotary valve driving motor to receive the driving force.

According to the rotary valve system according to the present invention, the compressed air supplied through the compressed air supply port of the housing is supplied to the adsorption tower in the adsorption process by the rotation of the rotary valve, the gas generated in the adsorption tower in the regeneration process is By rotation, it is discharged to the outside through the exhaust port of the housing through the exhaust passage.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Example 1

1 is a schematic exploded perspective view of a rotary valve system according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of a rotary valve system according to a first embodiment of the present invention.

Rotary valve system according to a first embodiment of the present invention is composed of a housing (120, 140) to allow the rotary valve 100 to rotate about the same axis by embedding the rotary valve 100 and the rotary valve 100 . On the other hand, the housing (120,140) is a compressed air supply port housing having a compressed air supply port 126, the compressed air is supplied to the adsorption tower (not shown) by the rotation of the housing 120 and the rotary valve 100 Adsorption port unit housing 140 is provided with an adsorption port 142 for supplying or discharging the gas generated during the regeneration of the adsorption tower.

Rotary valve 100 is composed of a lower structure 102 and the upper structure 104. The lower structure 102 of the rotary valve 100 is formed in a cylindrical shape having a horizontal horizontal cross section of the shaft center, and the outer circumferential surface of the lower structure 102 has a compressed air supply port housing 120 and an adsorption port housing 140. To contact.

Like the lower structure 102, the upper structure 104 of the rotary valve 100 has a cylindrical shape in which the horizontal cross section of the shaft center is circular, but the diameter of the horizontal cross section of the upper structure 104 is the diameter of the horizontal cross section of the lower structure 102. Is less than That is, the rotary valve 100 has a shape in which a small cylinder is joined to a large cylinder. In addition, the upper structure 104 of the rotary valve 100 is coupled to the drive shaft 204 connected to the drive motor 202 is provided with a drive shaft receiving portion 116 of the female type so as to transmit a driving force to the rotary valve 100. do. However, the shape of the upper structure 104 is not limited to the cylindrical shape, it is also possible to have a polygonal column shape including the drive shaft receiving portion 116. In addition, in the implementation of the present invention, the drive shaft accommodating part 116 is not only formed in a female shape as shown in FIG. 1 or 2, but also the drive shaft accommodating part 116 is formed to protrude in a male shape and the drive shaft 204 is formed. It is also possible to be a female type to be coupled to the drive shaft receiving portion 116 protruding in the male.

3 is a cross-sectional view of the rotary valve 100 in the rotary valve system according to the first preferred embodiment of the present invention, Figure 4 is a rotary valve 100 in the rotary valve system according to the first preferred embodiment of the present invention 5 is a bottom plan view of the rotary valve 100 in the rotary valve system according to the first preferred embodiment of the present invention.

As described above, the upper structure 104 of the rotary valve 100 is provided with a drive shaft accommodating part 118 that is connected to the drive shaft 204 of the drive motor 202 and transmits a driving force to the rotary valve 100. On one side of the lower structure 102, the compressed air supply passage 106 which serves as a passage for delivering the compressed air supplied from the compressed air supply port 126 to the adsorption tower and the gas discharged from the adsorption tower in the regeneration process are discharged. An exhaust passage 108 is provided that serves as a passage to the port 148. The exhaust passage 108 is preferably located in the 180 degree direction of the compressed air supply passage 106, and the bottom opening 108b of the exhaust passage 108 is located at the bottom of the lower structure 102 and the exhaust passage 108 The side opening 108a of the toward the outer peripheral surface of the lower structure (102).

While the rotary valve 100 rotates, compressed air is delivered to the adsorption tower in the adsorption process through the compressed air supply passage 106, and the gas generated in the adsorption tower in the regeneration process is discharged through the exhaust port 108. Is delivered.

Meanwhile, the bottom surface of the lower structure 102 of the rotary valve 100 includes a compressed air distribution unit 110 and an exhaust passage including a bottom structure opening 106b of the lower structure of the compressed air supply passage 106 as shown in FIG. 5. An exhaust gas collection 112 is provided that includes a bottom opening 108b of 108. Compressed air distribution unit 110 and the exhaust gas collecting unit 112 is provided in an annular position in a position facing each other, as shown in Figure 5 centered on the axis of rotation of the rotary valve 100, of the rotary valve 100 It is formed engraved in the lower structure (102).

The compressed air distribution unit 110 communicates the compressed air supply passage 106 with the adsorption tower being adsorbed, and the exhaust gas collecting unit 112 communicates the regeneration adsorption tower with the exhaust passage 108. That is, the compressed air distribution unit 110 receives compressed air supplied from the compressed air supply passage 106 to one or more adsorption towers through the adsorption port 142 provided in the adsorption port housing 140 for a predetermined time. The exhaust gas collecting unit 112 serves to discharge the gas generated in the adsorption tower during regeneration to the discharge port 148 through the exhaust passage 108 for a predetermined time.

In addition, the bottom surface of the lower structure 102 of the rotary valve 100 may be provided with a buffer groove 114 at a position that becomes a symmetry line between the compressed air distribution unit 110 and the exhaust gas collecting unit 112. The reason for having the buffer groove 114 is as follows.

The adsorption tower at the symmetrical position is in the stage where one adsorption tower completes the adsorption process and is converted to a regeneration process, while the other adsorption tower completes the regeneration process and is converted to an adsorption process. At this time, since the compressed air distribution unit 110 and the exhaust gas collecting unit 112 are disconnected from each other, the discharge of the gas generated during supply of compressed air to the adsorption tower and regeneration in the adsorption tower is temporarily blocked. Therefore, in the adsorption tower entering the regeneration process, a sudden gas discharge is started at the start of the regeneration process, and noise is generated. In the adsorption tower entering the compression process, a pump for supplying compressed air by a sudden supply of compressed air at the start of the adsorption process is started. Will be burdened. In order to solve this problem, a buffer groove 114 is introduced.

When the buffer groove 114 is installed on the bottom surface of the rotary valve 100, the adsorption tower which completes the adsorption process and is converted to the regeneration process and the adsorption tower which completes the regeneration process and is converted to the adsorption process are temporarily transferred through the buffer groove 114. Is connected. Then, the compressed air remaining in the adsorption tower in which the adsorption process is completed is transferred through the buffer recess 114 to the adsorption tower in which the regeneration process is completed. Therefore, in the case of the adsorption tower which completes the adsorption process and is converted to the regeneration process, the pressure of the gas discharged to the exhaust passage is reduced, so that the noise generated at the time of discharge is reduced, Since the air is filled before the adsorption process starts, the burden on the pump for supplying the compressed air is reduced.

FIG. 6 is a plan view of the compressed air supply port housing 120 in the rotary valve system according to the first preferred embodiment of the present invention, and FIG. 7 is the compression in the rotary valve system according to the first preferred embodiment of the present invention. It is a side view of the air supply port part housing 120. FIG. However, the planar shape of the compressed air supply port housing 120 shown in FIG. 6 is rectangular, but in a preferred embodiment of the present invention, the planar shape of the compressed air supply port housing 120 is not limited thereto. It can have the form of a circle, oval or polygon.

The upper portion of the compressed air supply port housing 120 is provided with a drive shaft inserting portion 124 through which the drive shaft 204 of the drive motor 202 passes, and an empty hollow space is formed therein. The inner diameter of the cylindrical hollow space is equal to or slightly larger than the outer diameter of the lower structure 102 of the rotary valve 100 so that a portion of the lower structure 102 of the rotary valve 100 fits into the cylindrical hollow space. However, when the O-ring for sealing is inserted into the rotary valve 100 as described below, the inner diameter of the cylindrical hollow space is smaller than the outer diameter of the lower structure 102 of the rotary valve 100. It is also possible to make it slightly larger. Meanwhile, a compressed air supply port 126 for supplying compressed air is formed on one side of the compressed air supply port housing 120. The compressed air supply port 126 is for supply of compressed air but is connected to an air compression pump although shown in the figure.

The rotary valve 100 is inserted into the internal space of the compressed air supply port housing 120. The upper portion of the upper structure 104 of the rotary valve 100 is attached to the top of the compressed air supply port housing 120 and a portion of the outer circumferential surface of the lower structure of the rotary valve 100 is compressed air supply port housing 120 It adheres to the wall of the inner cylindrical space.

8 is a cross-sectional view illustrating a state in which the rotary valve 100 is inserted into the compressed air supply port housing 120. As shown in FIG. 8, since the diameter of the upper structure 102 of the rotary valve 100 is smaller than the diameter of the lower structure 104, the compressed air supply port housing 120 and the rotary valve 100 may be separated from each other. Constant internal space is formed. This interior space 802 performs a kind of compression vessel that collects compressed air. The compressed air collected in the internal space 802 pushes the rotary valve 100 downward so that the bottom surface of the lower structure 102 of the rotary valve 100 and the suction port plate 144 of the suction port housing 140 Make sure this is in close contact. In addition, the inner space 802 allows the compressed air to be stably delivered to the adsorption tower during the adsorption process through the compressed air supply passage 106 of the rotary valve 100.

On the other hand, although the compressed air supply port 126 can also be formed in the rotation axis center direction of the rotary valve 100, Preferably it is formed so that it may be eccentric with the rotation axis center of the rotary valve 100. FIG. When the compressed air supply port 126 is formed to be eccentric with the rotary shaft center of the rotary valve 100 as shown in FIG. 6, air introduced through the compressed air supply port 126 causes the rotary valve 100 to rotate the shaft center. By providing a centrifugal force to rotate about the has the advantage of obtaining a cyclone effect.

On the other hand, the bottom of the compressed air supply port housing 120 is provided with a sealing member (not shown) such as an O-ring for maintaining airtightness when the compressed air supply port housing 120 and the suction port housing 140 is combined It is also possible.

Next, the suction port housing 140 will be described.

9 is a plan view of a suction port housing 140 of the rotary valve system according to a first embodiment of the present invention, Figure 10 is a suction port housing of the rotary valve system according to a first embodiment of the present invention ( 140 is a side view. However, the planar shape of the adsorption port housing 140 shown in FIG. 9 is a square, but in a preferred embodiment of the present invention, the planar shape of the adsorption port housing is not limited thereto. It may have a form.

The lower portion of the suction port housing 140 is provided with a suction port 142 that serves as a connection passage between compressed air or generated gas between the rotary valve 100 and the suction tower. The adsorption tower port 142 is preferably provided with the number of adsorption towers connected to the rotary valve system and is preferably two or more to increase the efficiency of air separation. In addition, it is preferable to form a plurality of pairs formed so as to face a 180 degree position around the axis of rotation of the rotary valve 100 so that the adsorption and regeneration processes can be continuously repeated. However, the number and configuration of the adsorption port 142 is not limited to the above description, and in some cases, may be an odd number.

Referring to FIG. 10, the suction port housing 140 has a stepped circular space in two stages. The rotary valve guide cylinder 146 at the bottom of the suction port housing 140 is equal to or slightly larger than the diameter of the rotary valve 100 so that the lower structure 102 of the rotary valve 100 can be inserted. . The gas discharge cylinder portion 148 formed at the upper end of the rotary valve guide cylinder portion 146 is configured to be larger than the diameter of the rotary valve guide cylinder portion 146. In addition, one or more gas discharge passages 150 are provided at an upper portion of the suction port housing 140.

11 is a view illustrating a state in which the rotary valve 100 is inserted into the suction port housing 140. The rotary valve 100 is inserted into the rotary valve guide cylindrical portion 146 to contact the adsorption tower port plate 144. At this time, since the diameter of the gas discharge cylindrical portion 148 is larger than the diameter of the rotary valve 100, an annular space is formed between the rotary valve 100 and the gas discharge cylindrical portion 148. The side opening 108a of the exhaust passage 108 in the rotary valve 100 is directed to this annular space. Therefore, the gas generated in the adsorption tower during the regeneration process is discharged into the annular space through the exhaust passage 108 of the rotary valve 100. That is, the annular space serves as a collecting vessel for collecting gas generated during regeneration. The gas generated during regeneration discharged into the annular space is discharged to the outside through the gas discharge passage 150. On the other hand, since noise may be generated during gas discharge, a noise suppression medium such as a sound absorbing material may be provided in the annular space.

The function of supplying compressed air to each adsorption tower and discharging the exhaust gas generated in each adsorption tower to the outside using the rotary valve system described above is as follows.

12 is a view for explaining the operation of the rotary valve system according to a first embodiment of the present invention. For convenience of description, the six adsorption tower ports 142 are disposed at the adsorption tower port plate 144 at regular intervals, and the rotary valve 100 is rotated in the clockwise direction.

The adsorption tower connected to the adsorption tower ports 142a, 142b, and 142c in the position (a) of FIG. 12 receives the compressed air by the compressed air distribution unit 110 and is in the adsorption process, and the adsorption tower ports 142d, 142e, and 142f. The adsorption tower connected to is in the regeneration process and the generated gas is discharged through the exhaust gas collecting unit 112. When the rotary valve 100 rotates clockwise to be in the position (b) of FIG. 12, the adsorption tower connected to the adsorption tower ports 142b and 142c is still in the adsorption process, and the adsorption tower connected to the adsorption tower ports 142e and 142f. Will be during the playback process. Meanwhile, the adsorption tower ports 142a and 142d communicate with each other by the buffer recess 114, and some air is transferred from the adsorption tower port 142a to the adsorption tower port 142d to be connected to the adsorption tower port 142a as described above. When switching to this regeneration process, the noise caused by the discharge of gas is reduced, and when the adsorption tower connected to the adsorption tower port 142d is switched to the adsorption process, the compression pump is not subjected to excessive impact. When the rotary valve 100 rotates clockwise again to the position (c) of FIG. 12, the adsorption tower ports 142b, 142c, and 142d perform the adsorption process and are connected to the adsorption tower ports 142e, 142f, and 142a. The adsorption tower performs a regeneration process.

Example 2

Figure 13a is a view showing the appearance of the rotary valve 100 in a rotary valve system according to a second preferred embodiment of the present invention, Figure 13b is a rotary in the rotary valve system according to a second preferred embodiment of the present invention Top view of the valve 100.

When the rotary valve 100 is inserted into the compressed air supply port housing 120 and the adsorption port housing 140 and rotates, the compressed air or the exhaust gas is discharged between the rotary valve 100 and the housings 120 and 140. Leakage may occur. Therefore, in order to prevent this, the rotary valve 100 may be provided with a sealing material such as an O-ring. As shown in FIGS. 13A and 13B, the lower structure 102 of the rotary valve 100 includes a compressed air sealing unit 1302 and an exhaust gas sealing unit 1304, and the upper structure of the rotary valve 100 ( The driving motor sealing part 1306 is provided at a portion where the 104 is in contact with the upper surface of the compressed air supply port housing 120.

Each sealing portion 1302, 1304, 1306 inserts a sealing member such as an O-ring. The O-ring inserted into the compressed air sealing unit 1302 is in contact with the compressed air supply port housing 120 to prevent the compressed air from leaking toward the adsorption port housing 140. In addition, the O-ring inserted into the drive motor sealing part 1306 prevents leakage of compressed air to the drive shaft insertion part 124 of the compressed air supply port part housing 120.

On the other hand, the O-ring inserted into the exhaust gas sealing part 1304 prevents air leakage in the adsorption port part housing 140. However, as described above, since the rotary valve 100 is in close contact with the adsorption port plate 144 in the adsorption port unit housing 140 by the compressed air, the exhaust gas sealing unit 1304 may be provided.

Example 3

14 to 17 is a view of a rotary valve system according to a third embodiment of the present invention. In the first preferred embodiment of the present invention, the compressed air distribution unit 110 and the exhaust gas collecting unit 112 are formed in the rotary valve 100, but the compressed air distribution unit 110 and the exhaust gas collecting unit 112 are Can be formed in the suction port plate 144 of the suction port portion housing 140.

14 is a cross-sectional view of the rotary valve 100 in the rotary valve system according to the third preferred embodiment of the present invention, Figure 15 is a lower portion of the rotary valve 100 in the rotary valve system according to the third preferred embodiment of the present invention Top view of the structure 102.

As shown in FIGS. 14 and 15, only the bottom openings 106b and 108b of the compressed air supply passage and the exhaust passage are provided at the bottom of the lower structure 102 of the rotary valve 100, and the compressed air distribution unit 110 is provided. And the exhaust gas collecting unit 112 and the buffer groove 114 is not provided.

16 is a plan view of the suction port housing 140 in the rotary valve system according to a third embodiment of the present invention, Figure 17 is a suction port housing (in the rotary valve system according to a third embodiment of the present invention) 140 is a side view.

The compressed air distribution unit 110 'and the exhaust gas collecting unit 112' are formed as grooves in the adsorption port plate 144, and each of the compressed air distribution unit 110 'and the exhaust gas collecting unit 112' is formed at 1. The above suction port 142 is provided. However, in the third preferred embodiment of the present invention, the compressed air distribution unit 110 'and the exhaust gas collection unit 112' are merely names given for the association with the first embodiment, and each distribution unit 110 'is provided. 112 ', when in communication with the compressed air supply passage 106 by the rotation of the rotary valve 100, functions as a compressed air distribution unit, and when in communication with the exhaust passage 108, 112'.

Example 4

In the practice of the present invention, the compressed air supply port housing and the suction port housing are not limited to the same configuration as in the first embodiment.

FIG. 18A is a cross-sectional view of the compressed air supply port housing 120 in the rotary valve system according to the fourth embodiment of the present invention, and FIG. 18B is a cross-sectional view of the adsorption port housing 140 according to the fourth embodiment of the present invention. to be.

In the fourth preferred embodiment of the present invention, the gas discharge cylinder portion 148 serving as an exhaust gas collecting vessel for collecting the exhaust gas passing through the exhaust passage 108 of the rotary valve 100 has a suction port housing 140. It is to be provided in the compressed air supply port unit housing 120, rather than being provided in).

In addition, although not separately illustrated, in the preferred embodiment of the present invention, the compressed air supply port part housing 120 includes all the spaces into which the rotary valve 100 is inserted, and the adsorption port part housing 140 has an adsorption port plate. It can also be configured as a flat plate containing only 144.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, by switching the valve opening and closing method by the reciprocating motion as in the conventional solenoid valve in the PSA type air separation device to the valve opening and closing method by the rotary motion, the mechanical noise can be reduced. In addition, since there is no need for an additional controller or the like, the number of parts can be reduced, and the durability of the valve can be increased.

In addition, according to the present invention, it is possible to obtain a high-purity oxygen or nitrogen by dualizing the path so that the compressed air supplied during the adsorption of the adsorption tower and the gas generated during the regeneration of the adsorption tower are not mixed with each other.

In addition, according to the present invention, since two or more adsorption towers can be used, the time for separating oxygen and nitrogen in the air is shortened and the production cost is also reduced.

In addition, according to the present invention, the number of parts required for the valve can be significantly reduced, thereby reducing the valve production cost and having an advantageous effect on maintenance.

In addition, according to the present invention, by installing a buffer groove in the valve to reduce the discharge noise of the gas generated during regeneration, to reduce the burden on the compression pump for supplying compressed air to reduce the burden of the motor used in the compression pump and pump It has the effect of extending the life.

Claims (12)

In the rotary valve system for air separation apparatus by PSA method, It is formed in a cylindrical shape having a horizontal cross section perpendicular to the axis of rotation, and has a compressed air supply passage 106 serving as an inlet passage of compressed air and an exhaust passage 108 serving as a discharge passage of gas generated during regeneration of the adsorption tower. A drive shaft accommodating part which has a horizontal cross section perpendicular to the lower structure 102 and the axis of rotation being smaller than a cross section of the lower structure 102 attached to the upper portion of the lower structure 102 and receives a driving force from the driving shaft 204. A rotary valve 100 comprising an upper structure 104 having a 116; And The adsorption port plate 144 having a compressed air supply port 126 for receiving compressed air, one or more adsorption ports 142 for delivering compressed air to the adsorption tower and receiving gas generated during regeneration of the adsorption tower, A housing including one or more discharge ports 150 for discharging gas generated during regeneration to the outside, and a drive shaft 204 insert for connecting the drive shaft 204 and the rotary valve 100 to the outside; Rotary valve system comprising a. The method of claim 1, The compressed air supply passage 106 penetrates the upper and lower surfaces of the lower structure 102 of the rotary valve 100, and one opening 108b of the exhaust passage 108 is provided at the bottom of the lower structure and the other The opening (108b) is provided on the side outer peripheral surface of the substructure. The method of claim 1, The rotary valve 100, Compressed air distribution unit that is formed of an annular intaglio surface including a bottom opening 106b of the compressed air supply passage 106 provided at the bottom of the rotary valve 100 to distribute compressed air to an adsorption tower in an adsorption process. 110; And It is formed of an annular intaglio surface including an bottom surface opening 108b of the exhaust passage 108 provided on the bottom surface of the rotary valve 100 to collect gas generated from the adsorption tower being regenerated and transfer to the exhaust passage 108. Discharge gas collector 112 Rotary valve system comprising a. The method of claim 3, wherein The rotary valve 100 is provided on the bottom surface of the rotary valve 100, completes the adsorption process when the rotary valve 100 rotates and completes the adsorption tower and the regeneration process is converted to the regeneration process, and switched to the adsorption process Rotary valve system, characterized in that it comprises a buffer groove 114 for temporarily connecting the adsorption tower. The method according to any one of claims 1 to 4, The outer circumferential surface of the rotary valve (100) is provided with at least one O-ring (O-Ring) for preventing the leakage of air between the rotary valve and the housing. The method according to any one of claims 1 to 4, And an o-ring for preventing leakage of air between the upper structure (104) of the rotary valve (100) and the contact surface of the housing. The method according to any one of claims 1 to 4, The compressed air supply port (126) is provided on one side of the housing eccentric to the rotation axis of the rotary valve (100). The method according to any one of claims 1 to 4, The housing, Compressed air supply comprising a cylindrical hollow space 122 having the compressed air supply port 126 and the drive shaft inserting portion 124 and into which a part of the lower structure 102 of the rotary valve 100 is inserted. Port housing 120: and At least one suction port plate 142 is provided with a suction port plate 144 and the rotary valve guide cylindrical portion 146 for guiding the rotation of the rotary valve 100, and the rotary valve guide cylindrical portion 146 A gas discharge cylinder 148 formed at an upper end and larger than a diameter of the rotary valve guide part 146 to collect exhaust gas discharged from the exhaust passage 108, and the exhaust gas Discharge port housing 140 including one or more discharge ports 150 for discharging to the outside Rotary valve system, characterized in that consisting of. The method according to any one of claims 1 to 4, The housing, A cylindrical hollow space portion 122 into which the compressed air supply port 126, the drive shaft inserting portion 124, a part of the lower structure 102 of the rotary valve 100 is inserted, and the cylindrical hollow A compression including a gas discharge cylinder 148 for collecting exhaust gas discharged from the exhaust passage 108 below the space, and one or more discharge ports 150 for discharging the exhaust gas to the outside; An air supply port housing 120; And Discharge port housing 140 including a rotary valve guide cylindrical portion 146 for guiding rotation of the rotary valve 100 including the suction port plate 144 having one or more suction ports 142 formed thereon. Rotary valve system, characterized in that consisting of. The method of claim 8, A sealing member is inserted between the compressed air supply port housing 120 and the discharge port housing 140 to closely bond the compressed air supply port housing 120 and the discharge port housing 140. Rotary valve system characterized in that. The method of claim 1, The exhaust port plate 144 of the housing includes an annular compressed air distribution 110 'and an exhaust gas collection 112' for controlling compressed air supply and exhaust gas discharge at the adsorption port 142. Rotary valve system, characterized in that. In the aerosol separation device of the PSA system, PSA type air separation device, characterized in that using the rotary valve system as described in claim 1.