CN107158883B

CN107158883B - Air drying system and gas treatment system

Info

Publication number: CN107158883B
Application number: CN201710557863.2A
Authority: CN
Inventors: 张惊涛; 谢经纬
Original assignee: Chengdu Sepmem Sci & Tech Co ltd
Current assignee: Chengdu Sepmem Sci & Tech Co ltd
Priority date: 2017-07-10
Filing date: 2017-07-10
Publication date: 2023-07-18
Anticipated expiration: 2037-07-10
Also published as: CN107158883A

Abstract

An air drying system and a gas treatment system relate to the technical field of air drying. The air drying system comprises a raw material gas pipeline, a product gas pipeline, a reverse air discharge pipeline, a rotary valve and an adsorption tower. The rotary valve includes a non-rotating member having a first flow path and a rotating member having a second flow path. The rotating piece is rotated to enable the second flow passage to selectively communicate the raw material gas pipeline, the product gas pipeline, the reverse deflating pipeline and the adsorption tower. The gas treatment system comprises the air drying system. Both use a rotary valve to control the multiple pipelines, thereby reducing the cost and facilitating the control.

Description

Air drying system and gas treatment system

Technical Field

The invention relates to the technical field of air drying, in particular to an air drying system and a gas treatment system.

Background

The pressure swing adsorption dry air system comprises a plurality of operation steps, so that the number of the program control valves is very large, the investment cost and the equipment installation cost of the whole device are increased, and the valve frame area occupies a large area, so that the device is not easy to pry.

The system for pressure swing adsorption of dry air has high switching frequency of the program control valve due to short circulation time, and the failure probability of each part of the valve is greatly increased. Meanwhile, in the pressure swing adsorption pressure balancing process, the valve core is flushed by high-speed air flow, the sealing surface of the valve is easy to damage, the valve is internally leaked, the operation of the device is affected, the daily maintenance cost and the maintenance difficulty of the device are increased, the production time consumption is prolonged, and the production cost is increased.

From the operation condition of the prior pressure swing adsorption dry air device, the failure of a program control valve or the internal leakage of a sealing surface are the biggest bottlenecks affecting the stable operation of the whole device. Although the service life of the programmable valve can be prolonged by improving the design of the valve and optimizing the structure of the sealing surface, the problems of failure of the programmable valve and internal leakage of the sealing surface cannot be fundamentally avoided.

In general, the time of the adsorption operation in the adsorption process of air drying is short (less than one second), so that the short time requires that the programmable valve can respond quickly, which has very high requirements on the programmable valve, and the cost of the programmable valve is greatly increased.

Disclosure of Invention

The first object of the present invention is to provide an air drying system, which replaces a complicated programmable valve in a traditional multi-pipeline process by a rotary valve, and achieves the purpose of switching and controlling a plurality of pipelines by one rotary valve at the same time.

The second object of the present invention is to provide a gas treatment system, which uses a rotary valve to replace a complicated programmable valve in a traditional multi-pipeline process, so as to realize the purpose of switching and controlling a plurality of pipelines by one rotary valve at the same time.

Embodiments of the present invention are implemented as follows:

an air drying system includes a feed gas line, a product gas line, a reverse bleed gas line, a rotary valve, and at least one adsorption column. The adsorption cavity of the adsorption tower is filled with the catalyst for H ₂ The adsorbent for the O to specifically adsorb is provided with a first interface and a second interface which are communicated with the adsorption cavity. The rotary valve comprises a non-rotating part and a rotating part capable of rotating relative to the non-rotating part, wherein the non-rotating part is provided with a first runner penetrating through the side wall of the non-rotating part, the first runner comprises a first sub-runner, a second sub-runner, a third sub-runner, a fourth sub-runner and a fifth sub-runner, and the rotating part is provided with a second runner. The first interface is communicated with the first sub-runner, the second interface is communicated with the second sub-runner, the raw material gas pipeline is communicated with the third sub-runner, the product gas pipeline is communicated with the fourth sub-runner, and the reverse air discharge pipeline is communicated with the fifth sub-runner.

The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during one rotation period of the rotary member: the second runner selectively communicates the first sub runner with the third sub runner, and simultaneously selectively communicates the second sub runner with the fourth sub runner, and for a single adsorption tower, the communication duration of the first sub runner with the third sub runner and the communication duration of the second sub runner with the fourth sub runner are all one third of the rotation period; the second flow passage selectively communicates the first sub flow passage with the fifth sub flow passage, and for a single adsorption tower, the communication duration of the first sub flow passage with the fifth sub flow passage occupies one twelfth of the rotation period.

Further, the air drying system further comprises a flushing air inlet pipe and a flushing air outlet pipe, the first runner further comprises a sixth sub runner and a seventh sub runner, the flushing air inlet pipe is communicated with the sixth sub runner, and the flushing air outlet pipe is communicated with the seventh sub runner. The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during a rotation period: the second runner selectively communicates the second sub runner with the sixth sub runner, and simultaneously selectively communicates the first sub runner with the seventh sub runner, and for a single adsorption tower, the communication duration of the second sub runner with the sixth sub runner and the communication duration of the first sub runner with the seventh sub runner are all one third of the rotation period.

Further, the air drying system further comprises a final air charging pipeline, the first flow passage further comprises an eighth sub-flow passage, and the final air charging pipeline is communicated with the eighth sub-flow passage. The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during a rotation period: the second flow passage selectively communicates the second sub flow passage with the eighth sub flow passage, and for a single adsorption tower, the communication duration of the second sub flow passage with the eighth sub flow passage occupies one twelfth of the rotation period.

Further, the first connector, the second connector, the raw material gas pipeline, the product gas pipeline and the reverse air discharge pipeline are all connected with the non-rotating part.

Further, the second flow path includes a plurality of annular flow paths and a plurality of inter-layer flow paths. The annular runner is recessed from the outer wall of the rotating piece towards one side far away from the non-rotating piece, the annular runner is arranged along the circumferential direction of the rotating piece and is in a fan ring shape or a ring shape, the circle center of the circumference corresponding to the annular runner is positioned on the rotation axis of the rotating piece, and each interlayer runner is communicated with at least two annular runners. The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during a rotation period: the annular runner and the interlayer runner selectively communicate the first sub-runner with the third sub-runner, and simultaneously selectively communicate the second sub-runner with the fourth sub-runner; the annular runner and the interlayer runner selectively communicate the first sub-runner with the fifth sub-runner.

Further, the rotating member comprises a plurality of parallel and coaxially arranged unit layers, the axial leads of the unit layers are overlapped with the rotating axial lead of the rotating member, and each unit layer is provided with at least one annular flow channel.

Further, for any one of the sub-runners and one of the annular runners communicated with the sub-runner, along the circumferential direction of the rotating member, the ratio of the sum of the central angle degrees corresponding to the length of the annular runner and the aperture of the sub-runner to the peripheral angle degrees is a first ratio, the ratio of the flow time of the adsorption flow where the sub-runner is communicated with the annular runner and the corresponding adsorption tower is located to the one flow period is a second ratio, and the first ratio is equal to the second ratio.

Further, the adsorption tower is a plurality of, and first sub-runner and second sub-runner are also a plurality of, and every first sub-runner communicates with at least one first interface, and every second sub-runner communicates with at least one second interface, rotates the rotating member so that second runner will each second sub-runner selectivity intercommunication.

Further, the number of the adsorption towers, the first sub-runners and the second sub-runners is 12, the first interfaces are communicated with the first sub-runners in a one-to-one correspondence manner, and the second interfaces are communicated with the second sub-runners in a one-to-one correspondence manner. The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during a rotation period: the annular flow channel and the interlayer flow channel are used for selectively communicating the second interfaces of at least two adsorption towers, and the communicating duration of the second interface of one adsorption tower and the second interfaces of other adsorption towers accounts for one sixth of the rotation period.

A gas treatment system comprising the air drying system described above.

The embodiment of the invention has the beneficial effects that:

the air drying system provided by the embodiment of the invention replaces a complicated program control valve in the traditional multi-pipeline process by the rotary valve, thereby realizing the purpose of switching and controlling a plurality of pipelines by one rotary valve. By rotating the rotating part of the rotary valve, the second flow passage can be selectively communicated with each sub-flow passage of the first flow passage, and then the adsorption tower is selectively communicated with each pipeline, so that each flow in the pressure swing adsorption is completed. Compared with the traditional program control valve, the consumable of production equipment is obviously reduced, the equipment input cost and the installation cost are reduced, the equipment installation is simplified, and the time consumption of equipment installation and disassembly is shortened. Meanwhile, the connection mode of the pipeline of the whole system can be controlled and adjusted by rotating the rotating part of the rotary valve, so that the operation burden of the valve during switching is greatly simplified, the control of the valve is more convenient, the failure rate of the valve is reduced, and the maintenance cost is reduced.

The air drying system provided by the embodiment of the invention can change the connection relation of the whole pipeline by rotating the rotary valve, and can effectively reduce the pressure swing adsorption cycle time by adjusting the rotating speed of the driving motor for driving the rotary valve or adjusting the setting of the timer, so that the operation time of the adsorption operation step is possible to be lower than 2 seconds, and the operation time of the conventional pressure swing adsorption program-controlled valve cannot be lower than 2 seconds due to the limitation of the switching time of the program-controlled valve. By reducing the pressure swing adsorption cycle time, the adsorbent can be rapidly subjected to adsorption work, thereby reducing the loading size of the adsorbent and reducing the equipment cost investment. In addition, because the pressure swing adsorption cycle time is shortened, the size of the adsorption tower is reduced, the whole device is convenient to pry, and the manufacturing and mounting cost of the device is reduced. Meanwhile, the rotary valve can completely meet the requirement of an air drying system on quick switching.

The gas treatment system provided by the embodiment of the invention can replace a complicated program control valve in the traditional multi-pipeline process by using the rotary valve, and simultaneously, the switching control is carried out on a plurality of pipelines.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an air drying system according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a rotary valve of the air drying system of FIG. 1;

FIG. 3 is a schematic plan view of a side wall of a non-rotating member of a rotary valve and a first flow passage of the air drying system of FIG. 1 after cutting and expanding along an axial direction of the rotary valve;

FIG. 4 is a schematic plan view of a second flow path of a rotary member of the rotary valve of the air drying system of FIG. 1 after cutting and expanding along an axial direction of the rotary valve;

FIG. 5 is a schematic view of circular arcs corresponding to the annular flow channels and the sub-flow channels of the air drying system of FIG. 1;

fig. 6 is a schematic view of a seal of the air drying system of fig. 1.

Icon: 1000-an air drying system; 100-rotating the valve; 110-a rotating member; 120-non-rotating member; 130-a first flow channel; 131-a first sub-flow path; 131 a-sub-flow path; 131 b-sub-flow path; 131 c-sub-flow path; 131 d-sub-flow channels; 131 e-sub-flow path; 131 f-sub-flow path; 131 g-sub-flow channels; 131 h-sub-flow channels; 131 i-sub-flow channels; 131 j-sub-flow path; 131 k-sub-flow channels; 131 l-sub-flow channel; 132-a second sub-flow path; 132 a-sub-flow path; 132 b-sub-flow path; 132 c-sub-flow path; 132 d-sub-flow path; 132 e-sub-flow path; 132 f-sub-flow path; 132 g-sub-flow path; 132 h-sub-flow path; 132i—a sub-flow channel; 132 j-sub-flow path; 132 k-sub-flow path; 132 l-sub-flow channel; 133-a third sub-flow path; 134-fourth sub-flow path; 135-fifth sub-flow path; 136-sixth sub-flow path; 137-seventh sub-flow path; 138-eighth sub-flow path; 140-a second flow channel; 01-annular flow channel; 02-an annular flow channel; 03-annular flow channel; 031-annular flow channel; 032-annular flow channel; 033-annular flow channel; 04-annular flow channel; 05-an annular flow channel; 06-an annular flow channel; 061-an annular flow channel; 062-annular flow channels; 063-annular flow channel; 064-annular flow passage; 065-annular flow passage; 07-annular flow channel; 08-annular flow channel; 001-interlayer flow channels; 002-interlayer flow channels; 003-interlayer flow channels; 004-interlayer flow channels; 005-interlayer flow channels; 006-inter-layer flow channels; 007-inter-layer flow channels; 210-an adsorption tower; 210 a-a first interface; 210 b-a second interface; 211-an adsorption tower; 211 a-a first interface; 211 b-a second interface; 212-an adsorption tower; 212 a-a first interface; 212 b-a second interface; 213-adsorption tower; 213 a-a first interface; 213 b-a second interface; 214-an adsorption tower; 214 a-a first interface; 214 b-a second interface; 215-an adsorption column; 215 a-a first interface; 215 b-a second interface; 216-an adsorption tower; 216 a-a first interface; 216 b-a second interface; 217-adsorption column; 217 a-first interface; 217 b-a second interface; 218-an adsorption column; 218 a-a first interface; 218 b-a second interface; 219-an adsorption column; 219 a-a first interface; 219 b-a second interface; 2110-an adsorption tower; 2110 a-first interface; 2110 b-second interface; 2111-adsorption tower; 2111 a-first interface; 2111 b-second interface; 220-a raw material gas pipeline; 230-a product gas line; 240-a reverse bleed line; 250-final inflation line; 260-a purge gas inlet tube; 270-a purge gas outlet tube; 290-connecting the tubes; 300-seals.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

The terms "substantially," "essentially," and the like are intended to be interpreted as referring to the fact that the term is not necessarily to be construed as requiring absolute accuracy, but rather as a deviation.

Furthermore, the terms "parallel," "perpendicular," and the like, do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1, the present embodiment provides an air drying system 1000, wherein the air drying system 1000 includes a rotary valve 100, an adsorption tower unit (not shown), a raw gas pipeline 220, a product gas pipeline 230, a reverse bleed gas pipeline 240, a final air charging pipeline 250, a purge gas inlet pipe 260 and a purge gas outlet pipe 270.

The feed gas line 220, the product gas line 230, the reverse bleed line 240, the final charge gas line 250, the purge gas inlet line 260, the purge gas outlet line 270, and the adsorption column unit are all connected to the rotary valve 100. It should be noted that fig. 1 only shows the connection relationship between the above-mentioned respective pipes and the respective interfaces of the adsorption tower unit and the rotary valve 100, and fig. 1 is a schematic diagram of the connection relationship, and the connection positions are not limited.

The rotary valve 100 can selectively communicate the raw material gas line 220, the product gas line 230, the reverse bleed gas line 240, the final charge gas line 250, the purge gas inlet line 260 and the purge gas outlet line 270 with the adsorption tower unit during rotation, and can selectively communicate each adsorption tower in the adsorption tower unit with each other, so that the adsorption tower unit can smoothly complete the whole adsorption process.

The air drying system 1000 replaces a complicated program control valve in the traditional multi-pipeline process by the rotary valve 100, and achieves the purpose of switching and controlling a plurality of pipelines by the rotary valve 100 at the same time. Compared with the traditional program control valve, the method has the advantages that the consumable of production equipment is obviously reduced, the equipment input cost is reduced, the control on the valve and the pipeline switching is more convenient, the failure rate of the valve is reduced, and the maintenance cost is reduced.

Referring to fig. 2, 3 and 4, the rotary valve 100 includes a rotary member 110 and a non-rotary member 120, and the rotary member 110 is rotatably accommodated in the non-rotary member 120. In the present embodiment, the rotating member 110 has a substantially cylindrical shape, the non-rotating member 120 is sleeved on the rotating member 110, the non-rotating member 120 is coaxially disposed with the rotating member 110, and an inner side wall of the non-rotating member 120 abuts against an outer side wall of the rotating member 110. In other embodiments of the present invention, the rotating member 110 may have a substantially cylindrical shape.

Further, the non-rotating member 120 has a first flow path 130, and the first flow path 130 includes a first sub-flow path 131, a second sub-flow path 132, a third sub-flow path 133, a fourth sub-flow path 134, a fifth sub-flow path 135, a sixth sub-flow path 136, a seventh sub-flow path 137, and an eighth sub-flow path 138. The first flow channels 130 each penetrate the sidewall of the non-rotating member 120. The rotating member 110 has a second flow passage 140. The first flow channel 130 is used for communicating with the adsorption tower unit and each pipeline, and the adsorption state of the adsorption tower unit is indirectly controlled by controlling the communication relation between the first flow channel 130 and the second flow channel 140.

Further, the adsorption tower unit includes an adsorption tower 210, an adsorption tower 211, an adsorption tower 212, an adsorption tower 213, an adsorption tower 214, an adsorption tower 215, an adsorption tower 216, an adsorption tower 217, an adsorption tower 218, an adsorption tower 219, an adsorption tower 2110, and an adsorption tower 2111. Wherein the adsorption tower 210 has a first port 210a and a second port 210b in communication with the adsorption chamber thereof; the adsorption tower 211 has a first port 211a and a second port 211b communicating with its adsorption chamber; the adsorption tower 212 has a first interface 212a and a second interface 212b in communication with its adsorption cavity; the adsorption tower 213 has a first port 213a and a second port 213b in communication with the adsorption chamber thereof; the adsorption tower 214 has a first port 214a and a second port 214b in communication with its adsorption cavity; the adsorption tower 215 has a first port 215a and a second port 215b communicating with its adsorption chamber; the adsorption column 216 has a first port 216a and a second port 216b in communication with its adsorption cavity; the adsorption column 217 has a first port 217a and a second port 217b communicating with its adsorption chamber; the adsorption column 218 has a first port 218a and a second port 218b in communication with its adsorption cavity; the adsorption tower 219 has a first port 219a and a second port 219b in communication with its adsorption chamber; the adsorption tower 2110 has a first port 2110a and a second port 2110b communicating with the adsorption chamber thereof; the adsorption tower 2111 has a first port 2111a and a second port 2111b communicating with its adsorption chambers. The raw gas line 220, the product gas line 230, the reverse bleed line 240, the final charge line 250, the purge gas inlet line 260, the purge gas outlet line 270, and all the first ports and all the second ports are connected to the outer sidewall of the non-rotating member 120.

The adsorption towers are filled with a catalyst for H ₂ The adsorbent, which specifically adsorbs O, thereby drying the air.

In the present embodiment, specifically, the first sub-flow passages 131 and the second sub-flow passages 132 are 12, and the 12 first sub-flow passages 131 and the 12 second sub-flow passages 132 are uniformly spaced along the circumferential direction of the non-rotating member 120.

The 12 first sub-runners 131 are connected and communicated with 12 first interfaces of the adsorption tower unit in a one-to-one correspondence manner; the 12 second sub-flow passages 132 are connected and communicated with 12 second interfaces of the adsorption tower unit in a one-to-one correspondence manner; the raw material gas pipeline 220 is connected and communicated with the third sub-runner 133; the product gas line 230 is connected to and communicates with the fourth sub-flow path 134; the reverse bleed air pipeline 240 is connected and communicated with the fifth sub-runner 135; the final charge line 250 is connected to and communicates with the eighth sub-flow path 138; the purge gas inlet tube 260 is connected to and communicates with the sixth sub-flow passage 136; the purge gas outlet pipe 270 is connected to and communicates with the seventh sub-flow passage 137.

By rotating the rotating member 110, the rotating member 110 can rotate relative to the non-rotating member 120, so that the second flow channel 140 rotates relative to the first flow channel 130, and the communication relationship between the second flow channel 140 and the first flow channel 130 is changed, so as to change the pipeline communication relationship of the whole air drying system 1000, thereby achieving the purpose of switching between different adsorption stages.

Please refer to fig. 3 and fig. 4. Fig. 3 is a schematic plan view of the side wall of the non-rotary member 120 and the first flow channel 130 after being cut and expanded along the axial direction of the rotary valve 100, and the side facing this is the inner side wall of the non-rotary member 120. Fig. 4 is a schematic plan view of the second flow path 140 of the rotary member 110 after being cut and expanded along the axial direction of the rotary valve 100, and the side facing toward us is the inner side of the rotary member 110.

In fig. 3 and 4, the plan-expanded views of the non-rotating member 120 and the rotating member 110 are partitioned. The planar development of the non-rotating member 120 and the rotating member 110 is divided into 12 consecutive small areas, numbered 1-12, along the circumference of the rotary valve 100, wherein the two areas 1 and 12 are connected before development, and the non-rotating member 120 and the rotating member 110 are developed along the boundary of 1 and 12 for convenience of illustration. Along the axial direction of the rotary valve 100, the rotary member 110 has a plurality of parallel and coaxially arranged unit layers, the axes of the unit layers are all overlapped with the rotation axis of the rotary member 110, and the unit layers respectively represent 8 layered regions, and are respectively numbered a-H. The areas A-H corresponding to the unit layers are arranged at intervals.

In an embodiment of the present invention, the widths of the first and second flow passages 130 and 140 refer to the width along the axial direction of the rotary valve 100, and the lengths of the first and second flow passages 130 and 140 refer to the length along the circumferential direction of the rotary valve 100. The lengths of the small areas numbered 1 to 12 in the circumferential direction of the rotary valve 100 are 1 lattice, and the widths of the 8 small areas numbered a to H in the axial direction of the rotary valve 100 are equal.

Specifically, the second flow path 140 includes an annular flow path unit (not shown) and an interlayer flow path unit (not shown). The annular flow passage unit comprises a plurality of annular flow passages, the outer side walls of the rotating members 110 are recessed towards one side far away from the non-rotating members 120, the annular flow passages are all arranged along the circumference of the rotating members 110, the annular flow passages are in a fan ring shape or a ring shape, the circle centers of the circumferences corresponding to the annular flow passages are located on the rotating shaft line of the rotating members 110, and the rotating members 110 are rotated to enable the annular flow passages to be selectively communicated with the first flow passages 130. The annular flow channel is arranged in the areas A-H corresponding to the unit layers. The interlayer runner unit comprises a plurality of interlayer runners, and the interlayer runners are used for communicating the two annular runners.

The annular flow passage is used for selectively communicating with the first flow passage 130, and the annular flow passage can be rotated by rotating the rotating member 110, so that the communication relation between the annular flow passage and the first flow passage 130 is changed. The interlayer flow channels are used for communicating the two annular flow channels, and the two sub-flow channels of the first flow channel 130 can be indirectly communicated by utilizing the indirect communication function of the interlayer flow channels, so that each adsorption tower and each pipeline are mutually communicated, and the communication relationship between each adsorption tower and each pipeline can be changed by rotating the rotating member 110, so that the aim of controlling the adsorption state of the air drying system 1000 is fulfilled.

It should be noted that, since the inner side wall of the non-rotating member 120 abuts against the outer side wall of the rotating member 110, the non-rotating member 120 has a sealing effect on the annular flow channel, so that the gas entering the annular flow channel cannot escape from between the non-rotating member 120 and the rotating member 110, and the gas in the annular flow channel can smoothly and accurately enter the preset path. In other embodiments of the present invention, the interlayer flow channel may be used to connect three or more annular flow channels, and the two annular flow channels may not necessarily be connected by only one interlayer flow channel, but may be connected by two or more interlayer flow channels.

Further, in the present embodiment, the annular flow passage unit includes an annular flow passage 01, an annular flow passage 02, an annular flow passage 03, an annular flow passage 04, an annular flow passage 05, an annular flow passage 06, an annular flow passage 07, and an annular flow passage 08.

More specifically, the annular flow channel 01 corresponds to the entire annular region of H1 to H12, and the annular flow channel 01 is annular. The annular flow channel 02 corresponds to the whole annular area of G1-G12, and the annular flow channel 02 is also annular.

The annular flow passage 03 includes an annular flow passage 031, an annular flow passage 032, and an annular flow passage 033. The annular flow passage 031 is a continuous fan ring shape corresponding to the F10-F1 region, wherein the length of the annular flow passage 031 in the F1 region is half of the length of the whole F1 region, i.e. the length of the annular flow passage 031 is 3.5 lattice. Similarly, unless specified otherwise, it is indicated that the entire corresponding region is occupied. The annular runner 032 is a continuous fan ring shape corresponding to the F4-F7 area, wherein the length of the annular runner 032 in the F7 area is half of the length of the whole F7 area, namely the length of the annular runner 032 is 3.5 lattice. The annular flow channel 033 is a continuous fan ring shape corresponding to the F8 region, wherein the length of the annular flow channel 033 in the F8 region is half of the length of the whole F8 region, namely the length of the annular flow channel 033 is 0.5 lattice.

The annular flow channel 04 corresponds to the whole annular area of E1-E12, and the annular flow channel 04 is annular. The annular flow passage 05 corresponds to the whole annular area of D1-D12, and the annular flow passage 05 is also annular.

The annular flow passage 06 includes an annular flow passage 061, an annular flow passage 062, an annular flow passage 063, an annular flow passage 064, and an annular flow passage 065. The annular flow passage 061 is a continuous fan ring shape corresponding to the C10-C1 area, wherein the length of the annular flow passage 061 in the C1 area is half of the length of the whole C1 area, namely the length of the annular flow passage 061 is 3.5 lattice. The annular flow channel 062 is a continuous fan ring shape corresponding to the C2 region, wherein the length of the annular flow channel 062 in the C2 region is half of the length of the whole C2 region, that is, the length of the annular flow channel 062 is 0.5 lattice, and the distance between the annular flow channel 062 and the annular flow channel 061 is 0.5 lattice. The annular flow channel 063 is a continuous fan ring shape corresponding to the C3 region, wherein the length of the annular flow channel 063 in the C3 region is half of the length of the entire C3 region, that is, the length of the annular flow channel 063 is 0.5 grid, and the distance between the annular flow channel 062 and the annular flow channel 063 is 0.5 grid. The annular flow passage 064 is a continuous fan ring shape corresponding to the C4-C7 area, wherein the length of the annular flow passage 064 in the C7 area is half of the length of the whole C7 area, namely the length of the annular flow passage 064 is 3.5 lattice, and the distance between the annular flow passage 064 and the annular flow passage 063 is 0.5 lattice. The annular flow passage 065 is a continuous fan ring shape corresponding to the C9 area, wherein the length of the annular flow passage 065 in the C9 area is half of the length of the whole C9 area, namely the length of the annular flow passage 065 is 0.5 grid, and the distance between the annular flow passage 065 and the annular flow passage 064 is 1.5 grid.

The annular flow channel 07 corresponds to the whole annular region of B1-B12, and the annular flow channel 07 is annular. The annular flow channel 08 corresponds to the whole annular area A1-A12, and the annular flow channel 08 is annular.

The inter-layer flow path unit includes an inter-layer flow path 001, an inter-layer flow path 002, an inter-layer flow path 003, an inter-layer flow path 004, an inter-layer flow path 005, an inter-layer flow path 006, and an inter-layer flow path 007.

Wherein the interlayer runner 001 communicates the annular runner 01 with the annular runner 031; the interlayer flow channel 002 communicates the annular flow channel 02 with the annular flow channel 033; the interlayer runner 003 communicates the annular runner 04 with the annular runner 032; the interlayer flow channel 004 communicates the annular flow channel 05 with the annular flow channel 062; the interlayer flow passage 005 communicates the annular flow passage 063 with the annular flow passage 065; the interlayer flow channel 006 communicates the annular flow channel 064 with the annular flow channel 07; the interlayer flow path 007 communicates the annular flow path 061 and the annular flow path 08.

In this embodiment, each interlayer flow channel is a communication pipe provided on the rotating member 110, and each interlayer flow channel is used for communicating two specific annular flow channels, and does not interfere with other annular flow channels or other interlayer flow channels. More preferably, each interlayer flow passage is approximately arc-shaped, so that resistance to gas flow can be reduced, and stability in the gas flow process can be improved. In other embodiments of the present invention, the shape of each of the interlayer flow paths is not particularly limited and specified, and two specific annular flow paths may be connected. In other embodiments of the present invention, each of the interlayer flow paths may be a communication groove formed by recessing a sidewall of the rotating member 110 toward a side away from the non-rotating member 120, but is not limited thereto.

Further, in the present embodiment, the first flow channel 130 is a through hole penetrating the non-rotating member 120 along the radial direction of the non-rotating member 120. In the present embodiment, the interval between each first sub-runner 131 is 0.5 grid, the interval between each second sub-runner 132 is also 0.5 grid, and the length of each first sub-runner 131 and each second sub-runner 132 is 0.5 grid. The 12 first sub-runners 131 are a sub-runner 131a, a sub-runner 131b, a sub-runner 131c, a sub-runner 131d, a sub-runner 131e, a sub-runner 131f, a sub-runner 131g, a sub-runner 131h, a sub-runner 131i, a sub-runner 131j, a sub-runner 131k, and a sub-runner 131l, respectively. The 12 second sub-runners 132 are a sub-runner 132a, a sub-runner 132b, a sub-runner 132c, a sub-runner 132d, a sub-runner 132e, a sub-runner 132f, a sub-runner 132g, a sub-runner 132h, a sub-runner 132i, a sub-runner 132j, a sub-runner 132k, and a sub-runner 132l, respectively. The third sub-runner 133, the fourth sub-runner 134, the fifth sub-runner 135, the sixth sub-runner 136, the seventh sub-runner 137 and the eighth sub-runner 138 are all one in number and each have a length of 0.5 lattice. The sub-flow paths 131a, 132a, 133, 134, 135, 136, 137 and 138 are arranged substantially linearly in the axial direction of the rotary valve 100.

It should be noted that, in other embodiments of the present invention, the first flow channel 130 may have other shapes, and the shape of the first flow channel 130 is not limited, so long as the first flow channel 130 may connect a specific annular flow channel and an external pipeline.

Specifically, in the present embodiment, the sub-flow passage 131a is located in the F1 region and at one end of the F1 region near the F2 region, and the first sub-flow passage 131 is used to communicate with the annular flow passage 03. The sub-flow passage 132a is located in the region C1 and at one end of the region C1 near the region C2, and the second sub-flow passage 132 is used for communicating with the annular flow passage 06. The third sub-flow channel 133 is located in the H1 region and at one end of the H1 region near the H2 region, and the third sub-flow channel 133 is used for communicating with the annular flow channel 01. The fourth sub-flow passage 134 is located in the area A1 and at an end of the area A1 near the area A2, and the fourth sub-flow passage 134 is used for communicating with the annular flow passage 08. The fifth sub-flow passage 135 is located in the G1 region and at an end of the G1 region near the G2 region, and the fifth sub-flow passage 135 is used for communicating with the annular flow passage 02. The sixth sub-flow passage 136 is located in the B1 region and at one end of the B1 region near the B2 region, and the sixth sub-flow passage 136 is used for communicating with the annular flow passage 07. The seventh sub-flow passage 137 is located in the E1 region and at an end of the E1 region near the E2 region, and the seventh sub-flow passage 137 is configured to communicate with the annular flow passage 04. The eighth sub-flow passage 138 is located in the D1 region and located at an end of the D1 region near the D2 region, and the eighth sub-flow passage 138 is configured to communicate with the annular flow passage 05.

It should be noted that, the indirect connection is between the 12 first interfaces and the 12 second interfaces and the non-rotating member 120. The connection tube 290 connects 12 first interfaces and 12 second interfaces to the non-rotating member 120. Namely: the connection pipe 290 connects the first interface 210a, the first interface 211a, the first interface 212a, the first interface 213a, the first interface 214a, the first interface 215a, the first interface 216a, the first interface 217a, the first interface 218a, the first interface 219a, the first interface 2110a, and the first interface 2111a with the sub-runner 131a, the sub-runner 131b, the sub-runner 131c, the sub-runner 131d, the sub-runner 131e, the sub-runner 131f, the sub-runner 131g, the sub-runner 131h, the sub-runner 131i, the sub-runner 131j, the sub-runner 131k, and the sub-runner 131l in a one-to-one correspondence, that is, the first interface 210a is communicated with the sub-runner 131a by the connection pipe 290, the first interface 211a is communicated with the sub-runner 131b by the connection pipe 290, and so on. The connection pipe 290 connects the second port 210b, the second port 211b, the second port 212b, the second port 213b, the second port 214b, the second port 215b, the second port 216b, the second port 217b, the second port 218b, the second port 219b, the second port 2110b, and the second port 2111b to the sub-flow path 132a, the sub-flow path 132b, the sub-flow path 132c, the sub-flow path 132d, the sub-flow path 132e, the sub-flow path 132f, the sub-flow path 132g, the sub-flow path 132h, the sub-flow path 132i, the sub-flow path 132j, the sub-flow path 132k, and the sub-flow path 132l in one-to-one correspondence. That is, the second port 210b communicates with the sub-flow channel 132a via the connecting pipe 290, the second port 211b communicates with the sub-flow channel 132b via the connecting pipe 290, and so on, which will not be described herein.

The rotary valve 100 and the air drying system 1000 are described in detail below in connection with a specific adsorption process of the air drying system 1000.

The operational schedule of the air drying system 1000 is shown in table 1, wherein: a represents adsorption; ED represents the mean pressure drop; d represents reverse discharge; p represents flushing; ER represents the average pressure rise; FR represents the final boost. Each time sequence represents a time period of the same length.

Table 1 timing chart for operation of air drying system 1000

Referring to fig. 3 and 4, for example, as shown in table 1, when the air drying system 1000 enters the time sequence 1, the small area 1 of the rotating member 110 in fig. 4 coincides with the small area 1 of the non-rotating member 120 in fig. 3, and the small area 12 of the rotating member 110 coincides with the small area 12 of the non-rotating member 120. At this time, the annular flow passage 031 is about to communicate with the sub-flow passage 131a, and the annular flow passage 061 is about to communicate with the sub-flow passage 132a, and the adsorption tower 210 is about to enter the adsorption stage. Note that, the present invention is not limited to the above-described embodiments. Throughout the timing of the air drying system 1000, the rotational direction of the rotary member 110 is the direction K along the circumferential direction of the rotary valve 100, and the non-rotary member 120 remains stationary, i.e., the rotary member 110 rotates relative to the non-rotary member 120.

When the air drying system 1000 enters the timing 1, the annular flow passage 031 is communicated with the sub-flow passage 131a, and the annular flow passage 061 is communicated with the sub-flow passage 132a, and the adsorption tower 210 enters the adsorption stage.

Raw material gas (air) enters the annular runner 01 through the third sub-runner 133 by the raw material gas pipeline 220, then enters the annular runner 031 through the interlayer runner 001, enters the adsorption tower 210 through the sub-runner 131a and the first interface 210a, and after adsorption, the dried air enters the product gas pipeline 230 through the second interface 210b in sequence through the sub-runner 132a, the annular runner 061, the interlayer runner 007, the annular runner 08 and the fourth sub-runner 134 for discharge. In the adsorption stage, H in the raw material gas ₂ O is basically absorbed by the adsorbent, and the product gas contains little H ₂ O, even in the absence of H ₂ O。

Because the sum of the lengths of the annular flow passage 061 and the sub-flow passage 132a is 4 grids, and the sum of the lengths of the annular flow passage 031 and the sub-flow passage 131a is also 4 grids, the whole adsorption stage of the adsorption tower 210 can last for a period corresponding to 4 grids, that is, the ratio of the adsorption stage of the adsorption tower 210 to the whole period is 4 grids/12 grids, which is equal to one third, which is consistent with the ratio of the adsorption stage of the adsorption tower 210 to the whole time sequence period in the time sequence table being 4/12. The entire adsorption stage of the adsorption tower 210 lasts for the entire time sequence 1 to time sequence 4.

It should be noted that, the ratio of the lengths of the annular flow channel 031 and the sub flow channel 131a to the whole 12 grids is a first ratio, the ratio of the lengths of the annular flow channel 061 and the sub flow channel 132a to the whole 12 grids is also a first ratio, and the ratio of the adsorption stage to the whole time sequence period is a second ratio. Theoretically, the first ratio and the second ratio should be equal. It should be noted that, as shown in fig. 5, the length of the annular flow path 031 refers to an arc length L3 corresponding to the annular flow path 031 along the circumferential direction of the rotary valve 100, the length of the sub-flow path 131a refers to an arc length L2 corresponding to the aperture L1 of the sub-flow path 131a along the circumferential direction of the rotary valve 100, and specifically, the length of the sub-flow path 131a does not refer to the aperture L1 of the sub-flow path 131a, but refers to the arc length L2 corresponding to the aperture L1 of the sub-flow path 131a along the circumferential direction of the rotary valve 100. The length of L2 and L3 and the ratio of the circumference of the rotating member 110 are equal to the ratio of the corresponding phases to the whole time period. The ratio may also be expressed as a ratio of the sum of the degrees of the central angles corresponding to L2 and L3 to the circumferential angle, i.e., the ratio of the sum of the degrees of the central angles corresponding to L2 and L3 to the circumferential angle is equal to the ratio of the corresponding stage to the entire timing cycle. In this embodiment, the length ratio is used for simplicity. However, in the actual production process, it is difficult to achieve the two ratios completely consistent, and a certain error will generally exist, so long as the normal function of the air drying system 1000 is not affected, and a certain error is acceptable. Therefore, it is also possible that the first ratio is equal to the second ratio. All annular flow channels and sub-flow channels meet this requirement.

With continued reference to fig. 3 and 4, when the adsorption phase of the adsorption tower 210 is just over and about to enter the uniform pressure drop, i.e., when the adsorption tower 210 is about to enter the time sequence 5, the small area 1 of the rotating member 110 coincides with the small area 5 of the non-rotating member 120. At this time, the sub-flow passage 132a is just disconnected from the annular flow passage 061 and is about to communicate with the annular flow passage 065; the sub-runner 131a is just disconnected from the annular runner 031. When the adsorption tower 210 enters the time sequence 5, the annular flow passage 065 is communicated with the sub-flow passage 132a, the annular flow passage 063 is communicated with the sub-flow passage 132g, the interlayer flow passage 005 communicates the annular flow passage 063 with the annular flow passage 065, the adsorption tower 210 is communicated with the adsorption tower 216, the adsorption tower 210 is in a pressure equalizing stage, and the adsorption tower 216 is in a pressure equalizing stage. While the sub-flow path 131a is in an open state.

In this stage, since the sum of the lengths of the sub-flow passage 132a and the annular flow passage 065 is 1 lattice, and the sum of the lengths of the sub-flow passage 132g and the annular flow passage 063 is also 1 lattice, the duration of the pressure equalizing and rising stages of the adsorption column 210 and the adsorption column 216 are each one-twelfth of the entire timing cycle. The pressure equalization stage of the adsorption column 210 and the pressure equalization stage of the adsorption column 216 last for the entire time sequence 5.

When the equalizing and reducing stage of the adsorption tower 210 is just finished and the reverse discharge stage is about to be started, that is, the adsorption tower 210 is about to enter the time sequence 6, the small area 1 of the rotating member 110 coincides with the small area 6 of the non-rotating member 120. At this time, the sub flow path 132a is just disconnected from the annular flow path 065; while the sub-flow passage 131a is about to communicate with the annular flow passage 033. When the adsorption tower 210 enters the time sequence 6, the sub-runner 131a is communicated with the annular runner 033, the sub-runner 132a is in a disconnected state, and the adsorption tower 210 is in a reverse discharge stage. The reverse bleed air is discharged from the reverse bleed air pipeline 240 after passing through the sub-runner 131a, the annular runner 033, the interlayer runner 002, the annular runner 02 and the fifth sub-runner 135 in sequence by the first connector 210 a.

In this stage, since the sum of the lengths of the sub-flow passage 131a and the annular flow passage 033 is 1 lattice, the duration of the reverse discharge stage of the adsorption tower 210 is one-twelfth of the entire timing cycle. The reverse discharge phase of the adsorption tower 210 continues for the entire time sequence 6.

When the reverse discharge stage of the adsorption tower 210 is just ended and the flushing stage is about to be entered, that is, when the adsorption tower 210 is about to enter the timing 7, the small area 1 of the rotating member 110 coincides with the small area 7 of the non-rotating member 120. At this time, the sub-runner 131a is also just disconnected from the annular runner 033 and is about to communicate with the annular runner 032; the sub-flow passage 132a is about to communicate with the annular flow passage 064. When the adsorption tower 210 enters the time sequence 7, the sub-runner 131a is communicated with the annular runner 032, the sub-runner 132a is communicated with the annular runner 064, and the adsorption tower 210 is in a flushing stage. The flushing gas sequentially passes through the sixth sub-runner 136, the annular runner 07, the interlayer runner 006, the annular runner 064, the sub-runner 132a and the second interface 210b through the flushing gas inlet pipe 260, then enters the adsorption tower 210 to flush the adsorbent in the adsorption tower 210, and the flushed flushing gas sequentially passes through the sub-runner 131a, the annular runner 032, the interlayer runner 003, the annular runner 04 and the seventh sub-runner 137 through the first interface 210a and then is discharged through the flushing gas outlet pipe 270.

In this stage, since the sum of the lengths of the sub-flow passage 131a and the annular flow passage 032 is 4 cells and the sum of the lengths of the sub-flow passage 132a and the annular flow passage 064 is also 4 cells, the duration of the flushing stage of the adsorption tower 210 is four twelve times of the entire timing cycle. The rinse phase of the adsorption tower 210 continues throughout the time sequence 7 to 10.

When the rinse phase of the adsorption tower 210 is just ended and the pressure equalizing phase is about to be entered, that is, when the adsorption tower 210 is about to enter the time sequence 11, the small area 1 of the rotating member 110 coincides with the small area 11 of the non-rotating member 120. At this time, the sub flow path 131a is just disconnected from the annular flow path 032; the sub-flow passage 132a is just disconnected from the annular flow passage 064 and is about to communicate with the annular flow passage 063. When the adsorption tower 210 enters the time sequence 11, the annular flow passage 063 is communicated with the sub-flow passage 132a, the annular flow passage 065 is communicated with the sub-flow passage 132g, the interlayer flow passage 005 communicates the annular flow passage 063 with the annular flow passage 065, the adsorption tower 210 is communicated with the adsorption tower 216, the adsorption tower 210 is in a pressure equalizing and rising stage, and the adsorption tower 216 is in a pressure equalizing and pressure reducing stage. While the sub-flow path 131a is in an open state.

In this stage, since the sum of the lengths of the sub-flow passage 132a and the annular flow passage 063 is 1 lattice, and the sum of the lengths of the sub-flow passage 132g and the annular flow passage 065 is also 1 lattice, the duration of the pressure equalizing and rising stage of the adsorption column 210 and the pressure equalizing and reducing stage of the adsorption column 216 are each one-twelfth of the entire timing cycle. The pressure equalization up stage of the adsorption column 210 and the pressure equalization down stage of the adsorption column 216 last for the entire time sequence 11.

When the pressure equalization stage of the adsorption tower 210 is just ended and the final pressure equalization stage is about to be entered, that is, when the adsorption tower 210 is about to enter the timing 12, the small region 1 of the rotor 110 coincides with the small region 12 of the non-rotor 120. At this time, the sub-flow passage 132a is just disconnected from the annular flow passage 063 and is about to communicate with the annular flow passage 062. When the adsorption tower 210 enters the time sequence 12, the annular flow channel 062 is communicated with the sub-flow channel 132a, and the adsorption tower 210 is in a final pressure increasing stage. The sub-flow path 131a is still in an open state. The final inflation enters the adsorption tower 210 through the second interface 210b to perform final pressure boosting treatment on the adsorption tower 210 after sequentially passing through the eighth sub-runner 138, the annular runner 05, the interlayer runner 004, the annular runner 062 and the sub-runner 132a by the final inflation pipeline 250.

In this stage, since the sum of the lengths of the sub-flow passage 132a and the annular flow passage 062 is 1 lattice, the duration of the final pressure-increasing stage of the adsorption tower 210 is one-twelfth of the entire timing cycle. The final boost phase of the adsorption column 210 continues for the entire time sequence 12.

Thus, the adsorption tower 210 completes one time sequence period, and if the operation is continued, the adsorption tower 210 circulates according to the above-described flow. The timing of the other adsorption towers is similar to that of the adsorption tower 210, and the states of the other adsorption towers in different timing stages, and the connection states and connection relations of the first flow passage 130, the second flow passage 140 and the whole pipeline can be obtained from table 1. Please refer to fig. 3 and fig. 4 in conjunction with table 1, and details thereof are omitted herein.

From this, it can be derived that: the air drying system 1000 replaces the complicated program control valves in the traditional multi-pipeline process by the rotary valve 100, so that a plurality of program control valves are successfully replaced by one rotary valve 100, and the aim of switching and controlling the whole air drying system 1000 by one rotary valve 100 is fulfilled. By rotating the rotary member 110 of the rotary valve 100, the second flow path 140 selectively communicates the sub-flow paths of the first flow path 130, and thus selectively communicates the adsorption towers with the pipelines, thereby completing the processes in the pressure swing adsorption.

Compared with the traditional program control valve, the material consumption of production equipment is obviously reduced, and the equipment investment cost and the installation cost are greatly reduced. And the equipment installation is simplified, and the time consumption for equipment installation and disassembly is shortened. Meanwhile, the control and adjustment of the connection relation between each adsorption tower and each pipeline of the whole air drying system 1000 can be realized only by rotating the rotating piece 110 of the rotary valve 100, so that the workload and the operation burden of the air drying system 1000 in the adsorption state switching process are greatly simplified, the control of the air drying system 1000 is more convenient, and the production efficiency is greatly improved. Because the number of the valves is reduced to 1, the valve failure rate is greatly reduced, the overall stability and safety of the air drying system 1000 are improved, and the maintenance cost and the time loss are reduced.

The air drying system 1000 can change the connection relation of the whole system by rotating the rotary valve 100, and can effectively reduce the cycle time of the time sequence period by adjusting the rotation speed of the driving motor for driving the rotary valve 100 or adjusting the timer setting, so that the operation time of the adsorption operation step is possible to be lower than 2 seconds. For a conventional pressure swing adsorption programmable valve, the operation time of the operation steps cannot be lower than 2 seconds due to the limitation of the switching time of the programmable valve. By using the air drying system 1000, the adsorbent can be rapidly adsorbed and desorbed by reducing the cycle time of the time sequence period, thereby reducing the loading size of the adsorbent. Thus, the volume of the adsorption tower can be greatly reduced, and the equipment cost investment can be reduced. In addition, because the time sequence cycle time is shortened, the volume of the adsorption tower is reduced, the whole air drying system 1000 is convenient to pry, and the manufacturing and installation cost is reduced.

It should be noted that, in other embodiments of the present invention, the structure of the air drying system may be different, and any one of the final air charging pipe 250, the purge air inlet pipe 260 or the purge air outlet pipe 270 and the corresponding time sequence stage may be selected as an option to be selectively added to the air drying system. The number of the adsorption towers, the first flow channels and the second flow channels are correspondingly changed and deleted, and the time schedule is also different. These variations may be derived from a combination of the foregoing and are not further described herein.

Further, in other embodiments of the present invention, the processes of pre-adsorption, displacement, etc. may be added to the air drying system, and the number of pressure equalizing steps and pressure equalizing drops may be adjusted according to actual production needs. Accordingly, the structures and timing charts of the first flow channel and the second flow channel after the flow processes are added will be changed correspondingly, and these changes can be introduced according to the adsorption flow principle of the adsorption tower 210 and obtained by combining table 1, fig. 3 and fig. 4, which are not repeated here.

Further, in the present embodiment, in order to improve the sealing effect between the rotating member 110 and the non-rotating member 120, one end of each annular flow passage of the rotating member 110, which is close to the non-rotating member 120, is provided with a sealing member 300 for improving the sealing effect, as shown in fig. 6. The sealing element 300 is arranged around each annular flow passage, the sealing element 300 is simultaneously propped against the rotating element 110 and the non-rotating element 120 in interference fit, the sealing element 300 is connected to the rotating element 110, and the sealing element 300 rotates along with the rotating element 110 relative to the non-rotating element 120. The sealing member 300 can further improve the sealing effect, prevent gas from escaping from between the fingers of the rotating member 110 and the non-rotating member 120, further prevent the gas in different flow channels from mixing, and ensure the purity of the gas. Specifically, in the present embodiment, the seal 300 is an elastic seal ring. It should be noted that, in other embodiments of the present invention, the sealing member 300 may also be disposed around an end of the first flow channel 130 near the rotating member 110.

In other embodiments of the present invention, the number of adsorption towers may be different, the first interfaces of the adsorption towers may also be in communication with the same first sub-flow channel, and the second interfaces of the adsorption towers may also be in communication with the same second sub-flow channel. At this time, the plurality of adsorption towers are at the same stage at the same timing. In other embodiments of the present invention, the first port of the same adsorption column may also be in communication with a plurality of first sub-channels simultaneously, and the second port of the same adsorption column may also be in communication with a plurality of second sub-channels simultaneously. At this time, the plurality of first flow passages and the plurality of second flow passages are both used for transporting the gas of the same adsorption tower at the same time.

In still other embodiments of the present invention, the rotary valve may be different in that the rotary member 110 of the rotary valve is fixed and non-rotatable, and the non-rotary member 120 may rotate relative to the rotary member 110. The second flow channel 140 is disposed on the inner side wall of the non-rotating member 120, and the first flow channel is disposed on the rotating member 110, which is different from the first flow channel 130, and enters the rotating member 110 from the end of the rotating member 110 and penetrates the rotating member 110 from the side wall of the rotating member 110. In this case, the control of the air drying system can be achieved by rotating the non-rotating member 120.

In still other embodiments of the present invention, the rotating member is cylindrical, and the non-rotating member is disposed at an end of the rotating member, and the rotating member is rotatable relative to the non-rotating member. At this time, the second flow passage is provided at an end of the rotating member near the non-rotating member, and the first flow passage penetrates the non-rotating member. In this case, the rotating member can also control the air drying system. Similar variations are not listed here.

In still other embodiments of the present invention, the annular flow passage is not necessarily fan-shaped or annular, and may be other shapes as long as the corresponding function is achieved.

It should be noted that, in the embodiment of the present invention, the timing chart is not unique, and the timing chart may be formulated and adjusted according to actual production needs. After the timing schedule is modified, the first flow channel and the second flow channel are correspondingly adjusted. The structures of the first flow channel and the second flow channel are required to be corresponding to the corresponding time schedule, and the matching mode of the first flow channel and the second flow channel with the time schedule can be obtained by combining the above, which is not repeated here. In addition, in other embodiments of the present invention, the flushing in table 1 may be replaced by evacuation, and the second flow channel and the first flow channel also need to be changed in structure correspondingly, and the specific embodiment of the evacuation flow channel structure may be obtained by referring to the above description, which is not repeated herein.

On the other hand, in the embodiment of the invention, the positions and the arrangement order of each interlayer runner and each annular runner are not fixed, and the positions and the order of each interlayer runner and each annular runner can be flexibly adjusted according to actual needs. In addition, the positions of the respective sub-channels of the first channel 130 are not fixed, and may be changed and adjusted according to actual situations, so long as it is ensured that a specific sub-channel can communicate with a specific annular channel at a specific time. And these changes and adjustments may be made according to the actual timing schedule.

It should be noted that, at least two air drying systems 1000 may be connected in series to form an air multi-stage drying system, so that the purity of the product gas may be further improved, the water content may be reduced, and sufficient drying may be achieved.

In general, in the present embodiment, the air drying system 1000 replaces the complicated programmable valves in the conventional multi-line process with the rotary valve 100, so as to achieve the purpose of switching and controlling multiple lines by one rotary valve 100 at the same time. The cost is reduced, the failure rate is reduced, and the operation and control are more convenient.

The present embodiment also provides a gas treatment system that includes an air drying system 1000. The gas treatment system utilizes the rotary valve to replace a complicated program control valve in the traditional multi-pipeline process, and simultaneously carries out switching control on a plurality of pipelines, compared with the traditional program control valve, the method has the advantages that the consumable of production equipment is obviously reduced, the equipment input cost is reduced, the control is more convenient, the fault rate is reduced, and the maintenance cost is reduced.

The embodiment also provides an air drying method. The air drying method includes rotating a rotating member of an air drying system such that during one rotation period of the rotating member: at least one time period during which the second flow passage communicates the at least one first sub-flow passage with the third sub-flow passage and simultaneously communicates the at least one second sub-flow passage with the fourth sub-flow passage. There is at least another time period during which the second flow passage communicates the at least one first sub-flow passage with the fifth sub-flow passage.

Further, the air drying method further comprises rotating the rotating member such that during the rotation period: at least one time period during which the second flow passage communicates the at least one second sub-flow passage with the sixth sub-flow passage and simultaneously communicates the at least one first sub-flow passage with the seventh sub-flow passage.

Further, the air drying method further comprises rotating the rotating member such that during the rotation period: at least one time period during which the second flow passage communicates the at least one second sub-flow passage with the eighth sub-flow passage.

The air drying method provided by the embodiment is convenient to implement and simple to operate, the connection mode of the pipeline of the whole system can be controlled and adjusted by rotating the rotating piece of the rotary valve, the operation burden of the valve during switching is greatly simplified, the control of the valve is more convenient, and the operation burden caused by simultaneously controlling the large-range control valve is avoided.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air drying system is characterized by comprising a raw material gas pipeline, a product gas pipeline, a reverse air discharge pipeline, a rotary valve and at least one adsorption tower; the adsorption cavity of the adsorption tower is filled with a catalyst for H ₂ The adsorption tower is provided with a first interface and a second interface which are communicated with the adsorption cavity; the rotary valve comprises a non-rotating part and a rotating part capable of rotating relative to the non-rotating part, the non-rotating part is provided with a first runner penetrating through the side wall of the non-rotating part, the first runner comprises a first sub runner, a second sub runner, a third sub runner, a fourth sub runner and a fifth sub runner, the rotating part is provided with a second runner, the first interface is communicated with the first sub runner, the second interface is communicated with the second sub runner, the raw material gas pipeline is communicated with the third sub runner, the product gas pipeline is communicated with the fourth sub runner, and the reverse air discharging pipeline is communicated with the fifth sub runner;

The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during one rotation cycle of the rotary member: the second runner selectively communicates the first sub-runner with the third sub-runner and simultaneously selectively communicates the second sub-runner with the fourth sub-runner, and for a single adsorption tower, the communication duration of the first sub-runner with the third sub-runner and the communication duration of the second sub-runner with the fourth sub-runner are all one third of the rotation period; the second flow passage selectively communicates the first sub flow passage with the fifth sub flow passage, and for a single adsorption tower, the communication duration of the first sub flow passage with the fifth sub flow passage accounts for one twelfth of the rotation period;

the adsorption towers are multiple, the first sub-flow channels and the second sub-flow channels are also multiple, each first sub-flow channel is communicated with at least one first interface, each second sub-flow channel is communicated with at least one second interface, and the rotating piece of the rotary valve is used for rotating relative to the non-rotating piece so that the second sub-flow channels are selectively communicated with each second sub-flow channel;

The second flow passage comprises a plurality of annular flow passages and a plurality of interlayer flow passages; the annular flow channel is recessed from the outer wall of the rotating piece towards one side far away from the non-rotating piece, the annular flow channel is arranged along the circumferential direction of the rotating piece and is in a fan ring shape or a ring shape, the circle center of the circumference corresponding to the annular flow channel is positioned on the rotating axial lead of the rotating piece, and each interlayer flow channel is communicated with at least two annular flow channels;

the rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during the rotation period: the annular runner and the interlayer runner selectively communicate the first sub-runner with the third sub-runner and simultaneously selectively communicate the second sub-runner with the fourth sub-runner; the annular runner and the interlayer runner selectively communicate the first sub-runner with the fifth sub-runner;

the rotating piece comprises a plurality of parallel and coaxially arranged unit layers, the axial leads of the unit layers are overlapped with the rotating axial lead of the rotating piece, and each unit layer is provided with at least one annular flow channel.

2. The air drying system of claim 1, further comprising a purge gas inlet tube and a purge gas outlet tube, the first flow passage further comprising a sixth sub-flow passage and a seventh sub-flow passage, the purge gas inlet tube in communication with the sixth sub-flow passage, the purge gas outlet tube in communication with the seventh sub-flow passage;

The rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during the rotation period: the second runner selectively communicates the second sub-runner with the sixth sub-runner, and simultaneously selectively communicates the first sub-runner with the seventh sub-runner, and for a single adsorption tower, the duration of the communication between the second sub-runner and the sixth sub-runner, and the duration of the communication between the first sub-runner and the seventh sub-runner are all one third of the rotation period.

3. The air drying system of claim 1 or 2, further comprising a final charge line, the first flow path further comprising an eighth sub-flow path, the final charge line in communication with the eighth sub-flow path;

the rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during the rotation period: the second flow passage selectively communicates the second sub flow passage with the eighth sub flow passage, and for a single adsorption tower, the communication duration of the second sub flow passage with the eighth sub flow passage occupies one twelfth of the rotation period.

4. The air drying system of claim 1, wherein the first interface, the second interface, the feed gas line, the product gas line, and the reverse bleed gas line are all connected to the non-rotating member.

5. The air drying system according to claim 1, wherein, for any one of the sub-flow passages and one of the annular flow passages communicating with the sub-flow passage, a ratio of a sum of a length of the annular flow passage and a number of degrees of central angles corresponding to apertures of the sub-flow passage to a number of degrees of peripheral angles is a first ratio, a ratio of a flow time of an adsorption flow in which the sub-flow passage communicates with the annular flow passage to a corresponding adsorption tower is a second ratio, and the first ratio is equal to the second ratio.

6. The air drying system of claim 1, wherein the number of adsorption towers, the first sub-flow channels and the second sub-flow channels is 12, the first interfaces are in one-to-one correspondence with the first sub-flow channels, and the second interfaces are in one-to-one correspondence with the second sub-flow channels;

the rotary member of the rotary valve is configured to rotate relative to the non-rotary member such that during the rotation period: the annular flow channel is selectively communicated with the second interfaces of at least two adsorption towers through the interlayer flow channel, and the communication duration of the second interface of one adsorption tower and the second interfaces of other adsorption towers accounts for one sixth of the rotation period.

7. A gas treatment system comprising an air drying system according to any one of claims 1 to 6.