CN107185355B - O (O) 2 Purification system and gas treatment system - Google Patents

O (O) 2 Purification system and gas treatment system Download PDF

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Publication number
CN107185355B
CN107185355B CN201710558311.3A CN201710558311A CN107185355B CN 107185355 B CN107185355 B CN 107185355B CN 201710558311 A CN201710558311 A CN 201710558311A CN 107185355 B CN107185355 B CN 107185355B
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sub
runner
communicated
flow passage
annular
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CN107185355A (en
Inventor
张惊涛
王振
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Chengdu Sepmem Sci & Tech Co ltd
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Chengdu Sepmem Sci & Tech Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • C01B13/0229—Purification or separation processes
    • C01B13/0248—Physical processing only
    • C01B13/0259—Physical processing only by adsorption on solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/12—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40007—Controlling pressure or temperature swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0001—Separation or purification processing
    • C01B2210/0009—Physical processing
    • C01B2210/0014—Physical processing by adsorption in solids

Abstract

O (O) 2 Purification system and gas treatment system, relate to O 2 The purification technical field. O (O) 2 The purification system comprises a raw material gas pipeline, a product gas pipeline, an evacuating 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 member is rotated to selectively communicate the feed gas line, the product gas line, the evacuation line, and the adsorption column through the second flow passage. The gas treatment system comprises the O 2 A purification system. Both use a rotary valve to control the multiple pipelines, thereby reducing the cost and facilitating the control.

Description

O (O) 2 Purification system and gas treatment system
Technical Field
The invention relates to O 2 The technical field of purification, in particular to an O 2 Purification system and gas treatment system.
Background
Pressure swing adsorption purification of O 2 The 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.
Pressure swing adsorption purification of O 2 The system has the advantages that the switching frequency of the program-controlled valve is high 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.
Purification of O from present pressure swing adsorption 2 In terms of the operation condition of the device, the failure of the program control valve or the internal leakage of the 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, O 2 The time of the adsorption operation is short (less than one second), so that the time is short, the programmable valve is required to be capable of responding quickly, the requirement on the programmable valve is very high, and the cost of the programmable valve is greatly increased.
Disclosure of Invention
A first object of the present invention is to provide an O 2 The purification system replaces a complicated program control valve in the traditional multi-pipeline process through the rotary valve, achieves the purpose that one rotary valve simultaneously carries out switching control on a plurality of pipelines, remarkably reduces consumable materials of production equipment compared with the traditional program control valve, reduces equipment input cost, simultaneously enables control of the valve to be more convenient, reduces failure rate of the valve, and reduces maintenance cost.
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:
o (O) 2 A purification system comprising a feed gas line, a product gas line, an evacuation line, a rotary valve, and at least one adsorption column. 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, 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 evacuating 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 three eighths of a 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 three eighths of a rotation period.
Further, O 2 The purification system further comprises a purge gas inlet tube, the first flow channel further comprises a sixth sub-flow channel, and the purge gas inlet tube is communicated with the sixth sub-flow channel. 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 sixth sub-runner with the second sub-runner, and for a single adsorption tower, the communication duration of the sixth sub-runner with the second sub-runner accounts for one eighth of the rotation period.
Further, when the sixth sub-runner is communicated with the second sub-runner, the fifth sub-runner is communicated with the first sub-runner.
Further, O 2 The purification system further comprises a final air charging pipeline, the first runner further comprises a seventh sub-runner, and the final air charging pipeline 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 seventh sub-runner with the second sub-runner, and for a single adsorption tower, the communication duration of the seventh sub-runner with the second sub-runner is one fourth of the rotation period.
Further, when the seventh sub-runner is communicated with the second sub-runner, the third sub-runner is communicated with the first sub-runner, and the fourth sub-runner is communicated with the second sub-runner.
Further, the first port, the second port, the raw gas line, the product gas line, and the evacuation line are all connected to the non-rotating member.
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 rough fan ring shape or a circular 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 in communication with the sub-runner, the ratio of the sum of the numbers of central angles corresponding to the length of the annular runner and the aperture of the sub-runner to the number of peripheral angles is a first ratio, and the ratio of the flow time of the adsorption flow in which the sub-runner is in communication with the annular runner and the corresponding adsorption tower is located to the cycle of the flow is a second ratio, wherein the first ratio and the second ratio are substantially equal.
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, and the rotating piece of rotary valve is used for rotating relatively non-rotating piece to make the second runner with each second sub-runner selectivity intercommunication.
Further, the number of the adsorption towers, the first sub-runners and the second sub-runners is 2, 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 the two adsorption towers, and the communicating duration of the second interfaces of the two adsorption towers accounts for one fourth of the rotation period.
A gas treatment system comprising the O 2 A purification system.
The embodiment of the invention has the beneficial effects that:
o provided by the embodiment of the invention 2 The purification system replaces a complicated program control valve in the traditional multi-pipeline process by a rotary valve, thereby realizing one rotationThe valve is used for switching control of a plurality of pipelines. 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.
O provided by the embodiment of the invention 2 The purification system 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 a driving motor for driving the rotary valve or adjusting the setting of a timer, so that the operation time of an adsorption operation step is lower than 2 seconds, while the operation time of a conventional pressure swing adsorption program control valve cannot be lower than 2 seconds due to the limitation of the switching time of the program control 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 O 2 The purification system requires fast 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 shows O provided by an embodiment of the present invention 2 Schematic diagram of a purification system;
FIG. 2 is O in FIG. 1 2 A schematic plan view of the side wall of the non-rotating part of the rotary valve of the purifying system and the first flow passage after being cut and unfolded along the axial direction of the rotary valve;
FIG. 3 is O in FIG. 1 2 A second flow passage of a rotating member of a rotary valve of the purifying system is cut along the axial direction of the rotary valve and is unfolded to form a plan view schematic diagram;
FIG. 4 is O in FIG. 1 2 Schematic diagrams of circular arcs corresponding to annular runners and sub-runners of the purification system;
FIG. 5 is O of FIG. 1 2 Schematic of the seal of the purification system.
Icon: 1000-O 2 A purification 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; 132-a second sub-flow path; 132 a-sub-flow path; 132 b-sub-flow path; 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; 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; 04-annular flow channel; 05-an annular flow channel; 051-annular flow channels; 052-annular flow channel; 053-annular flow channel; 054-annular flow channel; 06-an annular flow channel; 07-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; 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; 220-a raw material gas pipeline; 230-a product gas line; 240-a purge gas inlet tube; 250-final inflation line; 260-evacuation line; 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.
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 figure 1 of the drawings in which,the present embodiment provides an O 2 Purification System 1000, O 2 Purification system 1000 includes rotary valve 100, an adsorption column unit (not shown), feed gas line 220, product gas line 230, purge gas inlet line 240, final charge gas line 250, and evacuation line 260.
The feed gas line 220, the product gas line 230, the purge gas inlet line 240, the final charge gas line 250, the evacuation line 260, 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 selectively communicates the raw gas line 220, the product gas line 230, the purge gas inlet line 240, the final charge line 250, and the evacuation line 260 with the adsorption tower unit during rotation, and selectively communicates the adsorption towers within the adsorption tower unit with each other, so that the adsorption tower unit can smoothly complete the whole adsorption process.
O 2 The purification system 1000 replaces a complicated program control valve in the traditional multi-pipeline process by the rotary valve 100, and achieves the aim 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 and 3, the rotary valve 100 includes a rotary member 110 and a non-rotary member 120, and the rotary member 110 is rotatably received 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, and a seventh sub-flow path 137. 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 and an adsorption tower 211. Wherein the adsorption tower 210 has a first port 210a and a second port 210b in communication with the adsorption chamber thereof; the adsorption column 211 has a first port 211a and a second port 211b communicating with its adsorption chamber. The feed gas line 220, the product gas line 230, the purge gas inlet line 240, the final charge gas line 250, the evacuation line 260, and all the first ports and all the second ports are connected to the outer sidewall of the non-rotating member 120.
Each adsorption tower is filled with an adsorbent for specifically adsorbing an impurity gas. Specifically, moisture, carbon dioxide, and a small amount of other gases are adsorbed by activated alumina packed in the bottom at the inlet of the adsorption tower, and then nitrogen is adsorbed by zeolite molecular sieves packed in the upper part of the activated alumina. Oxygen (as product gas) is withdrawn from the top outlet of the adsorption column as a non-adsorbed component. The adsorbent is not limited thereto, and may be other adsorbents that can be used for adsorbing impurity gases.
In the present embodiment, specifically, the number of the first sub-flow passages 131 and the second sub-flow passages 132 is 2, and the number of the 2 first sub-flow passages 131 and the number of the 2 second sub-flow passages 132 are uniformly spaced along the circumferential direction of the non-rotating member 120.
The 2 first sub-flow passages 131 are connected and communicated with the 2 first interfaces of the adsorption tower unit in a one-to-one correspondence manner; the 2 second sub-flow passages 132 are connected and communicated with 2 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 evacuation line 260 is connected to and communicates with the fifth sub-flow path 135; the final charge line 250 is connected to and communicates with the seventh sub-runner 137; the purge gas inlet conduit 240 is connected to and communicates with the sixth sub-flow path 136.
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, thereby changing the communication relationship between the second flow channel 140 and the first flow channel 130, and further changing the whole O 2 The pipeline communication relationship of the purification system 1000 achieves the aim of switching between different adsorption stages.
Please refer to fig. 2 and 3. Fig. 2 is a schematic plan view of the side wall of the non-rotatable 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-rotatable member 120. Fig. 3 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. 2 and 3, the plan-expanded views of the non-rotating member 120 and the rotating member 110 are partitioned. The planar expanded view of the non-rotating member 120 and the rotating member 110 is divided into 8 consecutive small areas, numbered 1-8, along the circumference of the rotary valve 100, wherein the two areas 1 and 8 are connected before expansion, and the non-rotating member 120 and the rotating member 110 are expanded along the boundary of 1 and 8 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 which are all arranged to coincide with the rotational axis of the rotary member 110, and these unit layers represent 7 layered regions, respectively numbered a to G. The areas A-G 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 respective small regions numbered 1 to 8 in the circumferential direction of the rotary valve 100 are 1 lattice, and the widths of the 7 small regions numbered a to G 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 includes a plurality of annular flow passages, each of which is recessed from an outer side wall of the rotating member 110 toward a side far away from the non-rotating member 120, the plurality of annular flow passages are all arranged along a circumferential direction of the rotating member 110, and the plurality of annular flow passages are in a substantially fan-shaped or ring shape, a circle center of a circumference corresponding to the plurality of annular flow passages is located on a rotation axis of the rotating member 110, and the rotating member 110 is rotated to selectively communicate the plurality of annular flow passages with the first flow passage 130. The annular flow channels are arranged in the areas A-G 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 channel is 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 channel, so that the adsorption towers and pipelines are mutually communicated, and the communication relationship between the adsorption towers and the pipelines can be changed by rotating the rotating piece 110, thereby achieving the control of O 2 The purpose of purifying the adsorption state of the system 1000.
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, and an annular flow passage 07.
More specifically, the annular flow passage 01 corresponds to the entire annular region of G1 to G8, and the annular flow passage 01 is annular. The annular flow passage 02 corresponds to the entire annular region of F1 to F8, and the annular flow passage 02 is also annular.
The annular flow path 03 includes an annular flow path 031 and an annular flow path 032. The annular flow passage 031 is a continuous fan ring shape corresponding to the E7-E1 regions, wherein the length of the annular flow passage 031 in the E7 region is half of the length of the entire E7 region, i.e. the length of the annular flow passage 031 is 2.5 grids. 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 E3-E5 areas, wherein the length of the annular runner 032 in the E3 area is half of the length of the whole E3 area, namely the length of the annular runner 032 is 2.5 grids.
The annular flow channel 04 corresponds to the continuous fan ring shape of the D3 area, the length of the annular flow channel 04 is 0.5 grid, and the annular flow channel 04 is positioned at one end of the D3 area, which is close to the D4 area.
The annular flow channels 05 include annular flow channels 051, annular flow channels 052, annular flow channels 053 and annular flow channels 054. The annular flow channel 051 is a continuous fan ring shape corresponding to the C7-C1 region, wherein the length of the annular flow channel 051 in the C7 region is half of the length of the whole C7 region, namely the length of the annular flow channel 051 is 2.5 grids. The annular flow channel 052 is a continuous fan ring shape corresponding to the C2 area, wherein the length of the annular flow channel 052 in the C2 area is half of the length of the whole C2 area, namely the length of the annular flow channel 052 is 0.5 grid, and the interval between the annular flow channel 052 and the annular flow channel 051 is 0.5 grid. The annular flow passage 053 is a continuous fan ring shape corresponding to the C3 region, wherein the length of the annular flow passage 053 in the C3 region is half of the length of the whole C3 region, namely the length of the annular flow passage 053 is 0.5 lattice, and the distance between the annular flow passage 053 and the annular flow passage 052 is 0.5 lattice. The annular flow passage 054 is a continuous fan ring shape corresponding to the C6 area, wherein the length of the annular flow passage 054 in the C6 area is half of the length of the whole C6 area, namely the length of the annular flow passage 054 is 0.5 grid, and the distance between the annular flow passage 054 and the annular flow passage 053 is 2.5 grids.
The annular flow channel 06 corresponds to the continuous fan ring shape of the B1 area, the length of the annular flow channel 06 is 0.5 grid, and the annular flow channel 06 is positioned at one end of the B1 area, which is close to the B2 area. The annular flow passage 07 corresponds to the entire annular region of A1 to A8, and the annular flow passage 07 is annular.
The interlayer runner unit includes an interlayer runner 001, an interlayer runner 002, an interlayer runner 003, an interlayer runner 004, an interlayer runner 005, and an interlayer runner 006.
Wherein the interlayer runner 001 communicates the annular runner 01 with the annular runner 031; the interlayer runner 002 communicates the annular runner 02 with the annular runner 032; the interlayer runner 003 communicates the annular runner 04 with the annular runner 053; interlayer flow channel 004 communicates annular flow channel 052 with annular flow channel 054; the interlayer flow channel 005 communicates the annular flow channel 051 with the annular flow channel 06; the interlayer flow path 006 communicates the annular flow path 051 with the annular flow path 07.
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 3.5 grids, the interval between each second sub-runner 132 is also 3.5 grids, and the length of each first sub-runner 131 and each second sub-runner 132 is 0.5 grid. The 2 first sub-runners 131 are a sub-runner 131a and a sub-runner 131b, respectively. The 2 second sub-runners 132 are sub-runner 132a and sub-runner 132b, respectively.
The third sub-runner 133, the fourth sub-runner 134, the fifth sub-runner 135, the sixth sub-runner 136 and the seventh sub-runner 137 are all one in number and each have a length of 0.5 lattice. The sub-flow paths 131a, 132a, 133, 134, 135, 136 and 137 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 E2 region and at one end of the E2 region near the E1 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 C2 region and at an end of the C2 region near the C1 region, and the second sub-flow passage 132 is used for communicating with the annular flow passage 05. The third sub-flow channel 133 is located in the G2 region and located at one end of the G2 region near the G1 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 A2 region and at one end of the A2 region near the A1 region, and the fourth sub-flow passage 134 is for communicating with the annular flow passage 07. The fifth sub-flow passage 135 is located in the F2 region and at an end of the F2 region near the F1 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 D2 region and at an end of the D2 region near the D1 region, and the sixth sub-flow passage 136 is configured to communicate with the annular flow passage 04. The seventh sub-flow passage 137 is located in the B2 region and at an end of the B2 region near the B1 region, and the seventh sub-flow passage 137 is configured to communicate with the annular flow passage 06.
It should be noted that, the indirect connection is between the 2 first interfaces and the 2 second interfaces and the non-rotating member 120. The connection pipe 290 connects 2 first interfaces and 2 second interfaces to the non-rotating member 120. That is, the first port 210a communicates with the sub-flow path 131a through the connection pipe 290, and the first port 211a communicates with the sub-flow path 131b through the connection pipe 290; the second port 210b communicates with the sub-flow path 132a via the connection pipe 290, and the second port 211b communicates with the sub-flow path 132b via the connection pipe 290.
The following is combined with O 2 Specific adsorption flow of purification System 1000 rotating valve 100 and O 2 Purification system 1000 is described in detail。
O 2 The operational timing schedule for purification system 1000 is shown in table 1, wherein: a represents adsorption; ED represents the mean pressure drop; v represents evacuation; ER represents the average pressure rise; FR represents the final boost; p represents flushing. Each time sequence represents a time period of the same length.
TABLE 1O 2 Operation time schedule of purification system 1000
Referring to FIGS. 2 and 3, as shown in Table 1, when O, using the adsorption column 210 as an example 2 At this point, when the purification system 1000 is about to enter sequence 1, the small area 1 of the rotating member 110 in fig. 3 coincides with the small area 1 of the non-rotating member 120 in fig. 2, and the small area 8 of the rotating member 110 coincides with the small area 8 of the non-rotating member 120. At this time, the annular flow passage 031 is about to communicate with the sub-flow passage 131a, the annular flow passage 051 is about to communicate with the sub-flow passage 132a, the annular flow passage 06 is about to communicate with the seventh sub-flow passage 137, and the adsorption tower 210 is about to enter the adsorption/final pressure increasing stage. Note that, the present invention is not limited to the above-described embodiments. At O 2 Throughout the sequence of the purification 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 O is 2 The purification system 1000 enters the time sequence 1, the annular runner 031 is communicated with the sub-runner 131a, the annular runner 051 is communicated with the sub-runner 132a, the annular runner 06 is communicated with the seventh sub-runner 137, and the adsorption tower 210 enters the adsorption/final pressure boosting stage. The raw material gas enters the annular flow passage 01 through the third sub-flow passage 133 by the raw material gas pipeline 220, then enters the annular flow passage 031 through the interlayer flow passage 001 and enters the adsorption tower 210 through the sub-flow passage 131a and the first connector 210a for adsorption. When the raw gas starts to enter the adsorption tower 210, the pressurized gas for final pressurization also enters the adsorption tower 210 through the seventh sub-flow passage 137, the annular flow passage 06, the interlayer flow passage 005, the annular flow passage 031, the sub-flow passage 132a, and the second port 210b in this order from the final charging line 250, and performs final pressurization treatment on the adsorption tower 210.
Since the pressure in the adsorption cavity of the adsorption tower 210 does not completely reach the set adsorption pressure after the pressure equalization of the adsorption tower 210, and when the raw material gas starts to enter the adsorption tower 210, the pressure at one end of the adsorption tower 210 near the first port 210a rapidly rises and approaches the set adsorption pressure, but the pressure at one end of the adsorption tower 210 near the second port 210b is still lower, so that the adsorption requirement cannot be well satisfied. Then, when the raw material gas just starts to enter the adsorption tower 210, the adsorption tower 210 is subjected to final pressure increasing treatment by the final aeration so that the pressures of both the end of the adsorption tower 210 close to the first port 210a and the end close to the second port 210b are balanced and close to the set adsorption pressure, thereby ensuring that the adsorption operation of the adsorption tower 210 can be performed efficiently and improving the adsorption effect.
The final pressure increasing process for the adsorption tower 210 is performed immediately after the start of the adsorption stage of the adsorption tower 210, and the final pressure increasing process is performed for a short period of time, and the final pressure increasing process may be determined according to the actual situation, not necessarily taking up one third of the total adsorption time.
In the present embodiment, since the sum of the lengths of the annular flow path 051 and the sub flow path 132a is 3 cells, and the sum of the lengths of the annular flow path 031 and the sub flow path 131a is also 3 cells. The whole adsorption stage of the adsorption tower 210 lasts for a period corresponding to 3 lattice lengths, i.e. the adsorption stage of the adsorption tower 210 occupies 3 lattice/8 lattice of the whole period, which is equal to three eighths, which is consistent with the ratio of the adsorption stage of the adsorption tower 210 in the whole time period of 3/8 in the time schedule. The entire adsorption stage of the adsorption tower 210 lasts for the entire time sequence 1 to the time sequence 3.
And in the whole adsorption stage of the adsorption tower 210, the sum of the lengths of the annular flow passage 06 and the seventh sub-flow passage 137 is 1 lattice. The entire final pressure-increasing stage of the adsorption tower 210 is continued for a period corresponding to 1 lattice length, and the final pressure-increasing stage of the adsorption tower 210 is continued for the entire time sequence 1. At time 1, the final pressure increasing stage of the adsorption tower 210 and the adsorption stage of the adsorption tower 210 are performed simultaneously, i.e., the adsorption/final pressure increasing stage. And the final charge of the final pressure boost stage of the adsorption column 210 is the product gas. At timings 2 to 3, the annular flow passage 06 and the seventh sub-flow passage 137 have been disconnected, and the adsorption tower 210 performs only the adsorption operation. The product gas sequentially passes through the sub-runner 132a, the annular runner 051, the interlayer runner 006, the annular runner 07 and the fourth sub-runner 134 by the second connector 210b and then enters the product gas pipeline 230 for discharge. In the adsorption stage, most of impurity gas in the raw material gas is adsorbed by the adsorbent, and only a small amount of impurity gas or even no impurity gas exists in the product gas.
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 8-grid is a first ratio, the ratio of the lengths of the annular flow channel 051 and the sub flow channel 132a to the whole 8-grid 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. 4, 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, the two proportions are difficult to be completely consistent, and a certain error generally exists as long as O is not influenced 2 Certain errors are acceptable for proper functioning of purification system 1000. Thus, it is also possible that the first ratio is substantially equal to the second ratio. All annular flow channels and sub-flow channels meet this requirement.
With continued reference to fig. 2 and 3, 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 4, the small area 1 of the rotating member 110 coincides with the small area 4 of the non-rotating member 120. At this time, the sub flow channel 132a is just disconnected from the annular flow channel 051 and is about to be communicated with the annular flow channel 054; the sub-runner 131a is just disconnected from the annular runner 031. When the adsorption tower 210 enters the time sequence 4, the annular flow passage 054 is communicated with the sub-flow passage 132a, the annular flow passage 052 is communicated with the sub-flow passage 132b, the annular flow passage 054 is communicated with the annular flow passage 052 by the interlayer flow passage 004, the adsorption tower 210 is communicated with the adsorption tower 211, the adsorption tower 210 is in a pressure equalizing stage, and the adsorption tower 211 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 path 132a and the annular flow path 054 is 1 lattice, and the sum of the lengths of the sub-flow path 132b and the annular flow path 052 is also 1 lattice, the duration of the pressure equalizing and rising stage of the adsorption column 210 and the pressure equalizing and rising stage of the adsorption column 211 are each one eighth of the entire timing cycle. The pressure equalization stage of the adsorption column 210 and the pressure equalization stage of the adsorption column 211 last for the entire time series 4.
When the pressure equalizing and reducing stage of the adsorption tower 210 is just finished and is about to enter the evacuation stage, that is, 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 path 132a is just disconnected from the annular flow path 054, and the sub-flow path 131a is about to communicate with the annular flow path 032. When the adsorption tower 210 enters the time sequence 5, the sub-flow passage 131a is communicated with the annular flow passage 032, and the adsorption tower 210 is in the evacuation stage. While the sub-flow path 132a is in an open state.
In this stage, since the sum of the lengths of the sub-flow path 131a and the annular flow path 032 is 3 lattice, the duration of the evacuation stage of the adsorption tower 210 is three eighths of the entire timing cycle. The evacuation phase of the adsorption column 210 continues throughout the time sequence 5 to 7.
And when the adsorption tower 210 is about to enter the timing 7, the sub-flow passage 132a is about to communicate with the annular flow passage 053. When the adsorption tower 210 enters the timing 7, the sub-flow passage 132a is communicated with the annular flow passage 053. At this time, the purge gas enters the adsorption column 210 through the purge gas inlet pipe 240 sequentially through the sixth sub-flow passage 136, the annular flow passage 04, the inter-layer flow passage 003, the annular flow passage 053, the sub-flow passage 132a and the second port 210b and flushes the adsorption column 210. During the flushing process, evacuation is continued and the flushed flushing gas is evacuated through evacuation line 260. The washing can enable the regeneration of the adsorbent to be more thorough, and the adsorption effect of the subsequent adsorption stage is improved.
Since the sum of the lengths of the sub-flow path 132a and the annular flow path 053 is 1 lattice, the duration of the flushing stage of the adsorption tower 210 is one eighth of the entire timing cycle. The rinse phase of the adsorption column 210 continues for the entire time sequence 7.
That is, at timings 5 to 6, the adsorption column 210 is evacuated only, and at timing 7, the adsorption column 210 is evacuated and flushed simultaneously. It should be noted that flushing is typically performed at the end of the evacuation, which not only allows for more thorough regeneration of the adsorbent, but also saves more flushing gas. The flushing time is short, and does not necessarily occupy one third of the whole evacuation phase, and can be determined according to actual needs.
In other embodiments of the invention, the duration of the flushing and final boost may be different and may be determined according to actual needs.
When the evacuation phase of the adsorption column 210 has just ended and is about to enter the pressure equalization stage, i.e., when the adsorption column 210 is about to enter the timing 8, the small region 1 of the rotary member 110 coincides with the small region 8 of the non-rotary member 120. At this time, the sub flow path 131a is just disconnected from the annular flow path 032; the sub-runner 132a has just been disconnected from the annular runner 053 and is about to communicate with the annular runner 052. When the adsorption tower 210 enters the time sequence 8, the annular flow passage 052 is communicated with the sub-flow passage 132a, the annular flow passage 054 is communicated with the sub-flow passage 132b, the annular flow passage 052 is communicated with the annular flow passage 054 by the interlayer flow passage 004, the adsorption tower 210 is communicated with the adsorption tower 211, the adsorption tower 210 is in a pressure equalizing and lifting stage, and the adsorption tower 211 is in a pressure equalizing and 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 path 132a and the annular flow path 052 is 1 lattice, and the sum of the lengths of the sub-flow path 132b and the annular flow path 054 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 211 are each one eighth of the entire timing cycle. The pressure equalizing and rising stage of the adsorption tower 210 and the pressure equalizing and reducing stage of the adsorption tower 211 last for the whole time sequence 8.
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 adsorption tower 211 is similar to that of the adsorption tower 210, and the states of the adsorption tower 211 at different timing stages, and the connection states and connection relations of the first flow path 130, the second flow path 140, and the entire piping can be found from table 1. Please refer to fig. 2 and 3 in conjunction with table 1, and details thereof are omitted herein.
From this, it can be derived that: o (O) 2 The purification 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 whole O is realized by one rotary valve 100 2 The purification system 1000 performs switching control. 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. At the same time, the whole O can be realized by only rotating the rotating member 110 of the rotary valve 100 2 Control and adjustment of connection relationship between each adsorption tower and each pipeline of purification system 1000 greatly simplifies O 2 The purification system 1000 is operated with respect to the amount of work and the operation load at the time of switching the adsorption state, so that the adsorption state is changed over to O 2 The control of the purification 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, and the O is improved 2 The overall stability and safety of the purification system 1000 reduces maintenance costs and time loss.
O 2 The purification 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 lower than 2 secondsCan be used. 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 O 2 The purification system 1000 can make the adsorbent rapidly adsorb and desorb 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 period cycle time is shortened, the volume of the adsorption tower is reduced, and the whole O is convenient 2 Purification system 1000 is prized to reduce manufacturing and installation costs.
In other embodiments of the present invention, O 2 The purification system may be configured differently, either the final charge line 250 or the purge gas inlet line 240, and the corresponding timing stage, may be optionally added to O 2 In a purification 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, pre-adsorption, displacement, etc. schemes may be added to O 2 In the purification system, the number of times of uniform lifting and uniform lowering can be adjusted according to actual production requirements. 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. 2 and fig. 3, 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. 5. 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.
It should be noted that, as shown in table 1, the suction and evacuation are not performed every time during the whole time period, but have a certain time interval. Thus, in other embodiments of the present invention, each of the annular flow passage 01, the annular flow passage 02, and the annular flow passage 07 may be constituted by a plurality of annular flow passages of a fanned ring shape arranged at intervals along the circumferential direction of the rotary member 110. The arrangement of the annular flow passages is determined according to table 1, i.e. when the corresponding stage occurs, the corresponding annular flow passages communicate with the corresponding sub-flow passages. The plurality of annular flow paths of the fan shape, which are arranged at intervals along the circumferential direction of the rotary member 110, may be mutually communicated and communicated with the outside by the same raw material gas pipeline 220, product gas pipeline 230 or evacuation pipeline 260; or the plurality of fan-shaped annular flow passages spaced apart in the circumferential direction of the rotary member 110 are not communicated with each other, but each of the fan-shaped annular flow passages is communicated with the outside by a raw gas line 220, a product gas line 230 or an evacuation line 260; and is not limited thereto.
In still other embodiments of the inventionIn embodiments, the rotary valves may differ 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 rotation of the non-rotating member 120 can achieve the rotation of O 2 Control of the purification system.
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 rotation member can also realize the rotation of O 2 Control of the purification 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.
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 is also possible to combine at least two O' s 2 Purification system 1000 is arranged in series to form O 2 Multistage purification system, thus can further improve product gas O 2 Is a pure product of (a).
In general, in the present embodiment, O 2 The purification system 1000 replaces a complicated program control valve in the traditional multi-pipeline process by the rotary valve 100, and achieves the aim of switching and controlling a plurality of pipelines by one rotary valve 100. 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 including O 2 Purification 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 O 2 The purification method. The O is 2 The purification method comprises the steps of rotating O 2 The rotating member of the purification 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. And at least one other time period during which the second flow passage communicates the at least one first sub-flow passage with the fifth sub-flow passage.
Further, O 2 The purification method also comprises the step of rotating O 2 The rotating member of the purification system is such that during one rotation period: at least one time period, 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 fifth sub-flow passage.
Further, O 2 The purification method also comprises the step of rotating O 2 Purification systemSuch that in one rotation period: at least one time period, the second flow passage communicates the at least one second sub-flow passage with the seventh sub-flow passage and simultaneously communicates the at least one second sub-flow passage with the fourth sub-flow passage and simultaneously communicates the at least one first sub-flow passage with the third sub-flow passage.
O provided by the present embodiment 2 The purification method 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 a 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 (9)

1. O (O) 2 The purification system is characterized by comprising a raw material gas pipeline, a product gas pipeline, an evacuating pipeline, a rotary valve and at least one adsorption tower; the adsorption tower is provided with a first interface and a second interface which are communicated with the adsorption cavity of the adsorption tower; 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 evacuation 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 three-eighths 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 three eighths 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. O according to claim 1 2 Purification system, characterized in that the O 2 The purification system further comprises a purge gas inlet pipe, the first flow channel further comprises a sixth sub-flow channel, and the purge gas inlet pipe is communicated with the sixth sub-flow channel;
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 sixth sub-flow passage with the second sub-flow passage, and for a single adsorption tower, the communication duration of the sixth sub-flow passage with the second sub-flow passage occupies one eighth of the rotation period.
3. O according to claim 2 2 The purification system is characterized in that when the sixth sub-runner is communicated with the second sub-runner, the fifth sub-runner is communicated with the first sub-runner.
4. An O according to claim 1 or 2 or 3 2 Purification system, characterized in that the O 2 The purification system further comprises a final air charging pipeline, the first runner further comprises a seventh sub-runner, and the final air charging pipeline 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 the rotation period: the second flow passage selectively communicates the seventh sub flow passage with the second sub flow passage, and for a single adsorption tower, the communication duration of the seventh sub flow passage with the second sub flow passage is one fourth of the rotation period.
5. O according to claim 4 2 The purification system is characterized in that when the seventh sub-runner is communicated with the second sub-runner, the third sub-runner is communicated with the first sub-runner, and the fourth sub-runner is communicated with the second sub-runner.
6. O according to claim 1 2 The purification system is characterized in that the first interface, the second interface, the raw material gas pipeline, the product gas pipeline and the evacuation pipeline are all connected with the non-rotating piece.
7. O according to claim 1 2 The purification system is characterized in that for any one of the sub-runners and one annular runner communicated with the sub-runner, the ratio of the sum of the number of central angles corresponding to the length of the annular runner and the aperture of the sub-runner to the number of peripheral angles 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.
8. O according to claim 1 2 The purification system is characterized in that the number of the adsorption tower, the number of the first sub-runners and the number of the second sub-runners are 2, 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 the rotation period: the annular flow channel is selectively communicated with the second interfaces of the two adsorption towers through the interlayer flow channel, and the communication duration of the second interfaces of the two adsorption towers accounts for one fourth of the rotation period.
9. A gas treatment system comprising O as claimed in any one of claims 1 to 8 2 A purification system.
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