Storage medium, and bed layer switching method, device and system of three-bed reactor

Abstract

The invention discloses a storage medium and a bed layer switching method, device and system of a three-bed reactor, and the method comprises the following steps: determining the upstream and downstream relationship of each bed layer according to the bed layer state switching sequence of three bed layers; generating a control instruction for realizing bed state switching according to a preset rule; the bed layer state switching is realized by switching valve state combinations for multiple times; the preset rule comprises that no more than three valve actions are controlled in the switching of each valve state combination, and the state of the gas outlet valve of at least one bed layer is kept to be open after the switching of each valve state combination; when bed layer states are switched, only a hydraulic system capable of supporting simultaneous driving of three valves to act is needed, and therefore the cost and the occupied area of the hydraulic system can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of reactor control, and in particular to a storage medium, a bed switching method, a device and a system for a three-bed reactor. Background Art

[0002] In thermal storage oxidation devices, three-bed reactors are gradually becoming more and more popular. Compared with traditional two-bed reactors, three-bed reactors have an additional cleaning bed, the purpose of which is to purge the non-purified waste gas in the residual bed into the oxidation chamber for treatment, so as to avoid the non-purified gas being discharged into the atmosphere and affecting the treatment effect.

[0003] The three-bed reactor increases the number of beds; in the prior art, the switching of the three beds is achieved by increasing the power of the hydraulic system and the hydraulic control pipeline.

[0004] The inventors have found through research that the bed switching method of the three-bed reactor in the prior art has at least the following defects:

[0005] The power and volume of the hydraulic system are too large, resulting in excessively high equipment costs for the control device of the three-bed reactor.

[0006] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0007] The object of the present invention is to reduce the equipment cost of a control device for a three-bed reactor.

[0008] The present invention provides a bed switching method for a three-bed reactor, comprising the steps of:

[0009] S11, determining the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers;

[0010] S12. Generate a control instruction for switching the bed state according to a preset rule; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instruction is used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0011] In another aspect of the present invention, a bed switching device for a three-bed reactor is provided, comprising:

[0012] A switching sequence determining unit is used to determine the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers;

[0013] A switching process control unit is used to generate control instructions for switching bed states according to preset rules; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed when in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rules include that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instructions are used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0014] In another aspect of the embodiment of the present invention, a bed switching system for a three-bed reactor is provided, which is used to implement the bed switching method of the three-bed reactor as described above, comprising: a hydraulic pump, a hydraulic pipeline switching device and a control device;

[0015] Three sets of front-end hydraulic pipelines are connected between the hydraulic pump and the hydraulic pipeline switching device; the hydraulic pipeline switching device is connected to the nine hydraulic valves of the three bed layers through nine sets of rear-end hydraulic pipelines; the hydraulic pump supports the control of up to three hydraulic valves at a time;

[0016] The hydraulic pipeline switching device switches the rear hydraulic pipeline connected to the front hydraulic pipeline according to the control instruction generated by the control device; the control instruction is used to implement the steps of the bed switching method of the three-bed reactor.

[0017] On the other hand, an embodiment of the present invention further provides a bed switching device for a three-bed reactor; the bed switching device for the three-bed reactor includes a computer program stored on a medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the methods described in the above aspects and achieves the same technical effects.

[0018] In another aspect of the embodiment of the present invention, a storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, each step of the bed switching method of the three-bed reactor as described above is implemented.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A three-bed reactor includes three beds, each of which requires three hydraulic valves (inlet valve, outlet valve, and purge valve) to switch the bed's working state. The existing technology generally requires the use of a high-power hydraulic system to synchronously control the nine hydraulic valves through nine sets of hydraulic pipelines, which results in high cost and large floor space for the hydraulic system.

[0021] In the present invention, the bed state is switched by switching multiple valve state combinations. Since only two to three hydraulic valve control actions need to be performed in each valve state combination switch, only a hydraulic system capable of simultaneously driving three valve actions is required when switching the bed state. This can effectively reduce the cost and floor space of the hydraulic system. Since in the present invention, the state of at least one bed outlet valve is kept open after the switching of the valve state combination in each valve state combination switch, it can ensure that the gas path is smooth and there is no pressure buildup during the bed state switching process.

[0022] Furthermore, in the present invention, while switching the bed state by switching multiple valve state combinations, the outlet valve of the bed that is about to enter the air intake state is also pre-closed and controlled. In this way, when the air intake valve and the air outlet valve of the bed are opened at the same time, the bed can be additionally purged, thereby improving the pyrolysis effect and efficiency of the bed.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 is a step diagram of the bed switching method of the three-bed reactor described in the present invention;

[0026] Figure 2 Schematic diagram of the structure of the bed switching device of the three-bed reactor of the present invention;

[0027] Figure 3 Schematic diagram of the structure of the bed switching system of the three-bed reactor of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the bed switching equipment of the three-bed reactor described in the present invention. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0030] Unless expressly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0031] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit specific positions or relative relationships. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable with each other.

[0032] Example 1

[0033] In order to reduce the equipment cost of the control device of the three-bed reactor, such as Figure 1 As shown, in an embodiment of the present invention, a bed switching method of a three-bed reactor is provided, comprising the steps of:

[0034] S11, determining the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers;

[0035] The bed switching system of the three-bed reactor used to implement the bed switching method of the three-bed reactor in the embodiment of the present invention can be as follows: Figure 2 As shown, it includes a hydraulic pump 01, a hydraulic pipeline switching device 02 and a control device 03; wherein, three sets of front-end hydraulic pipelines are connected between the hydraulic pump 01 and the hydraulic pipeline switching device 02; the hydraulic pipeline switching device 02 is connected to the nine hydraulic valves of the three bed layers through nine sets of rear-end hydraulic pipelines; the hydraulic pump supports the control of up to three hydraulic valves at a time;

[0036] The hydraulic pipeline switching device 02 switches the rear hydraulic pipeline connected to the front hydraulic pipeline according to the control instruction generated by the control device 03; the control instruction is used to implement the steps of the bed switching method of the three-bed reactor.

[0037] According to the hydraulic valve that needs to perform the action involved in the control instruction, the hydraulic pipeline switching device 02 can connect the front-end hydraulic pipeline with different rear-end hydraulic pipelines respectively to control the action of the corresponding hydraulic valve and convert the corresponding hydraulic valve into the corresponding open and closed state.

[0038] The three beds in the embodiment of the invention are each equipped with three hydraulic valves, specifically including an air inlet valve 11, a purge valve 12 and an air outlet valve 13 of bed A; an air inlet valve 21, a purge valve 22 and an air outlet valve 23 of bed B; and an air inlet valve 31, a purge valve 32 and an air outlet valve 33 of bed C.

[0039] In an embodiment of the present invention, the upstream and downstream relationships between the beds can be determined based on the transition sequence of their states during operation. Specifically, if bed A is currently in the intake state and its next state should be the exhaust state, bed B, which is in the exhaust state, is the downstream bed of bed A. If bed B is currently in the exhaust state and its next state should be the purge state, bed C, which is in the purge state, is the downstream bed of bed B. If bed C is currently in the purge state and its next state should be the intake state, bed A, which is in the intake state, is the downstream bed of bed C. In other words, for a bed currently in the intake state, its downstream bed is in the exhaust state, and its upstream bed is in the purge state.

[0040] S12. Generate a control instruction for switching the bed state according to a preset rule; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instruction is used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0041] In the embodiment of the present invention, the switching of the bed state refers to the conversion of the three beds from their current states to their respective next states, specifically including: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state; switching the bed in the air discharge state to the valve state combination corresponding to the purge state; and switching the bed in the purge state to the valve state combination corresponding to the air intake state.

[0042] The valve state combination in the embodiment of the present invention refers to the combination of the open and closed states of the hydraulic valves under a certain bed state. It should be noted that in the embodiment of the present invention, after the upstream and downstream relationships of the three beds are determined, when the bed state of one bed is determined, the bed states of the other two upstream and downstream beds are also determined. Therefore, a certain bed state can be used to represent the bed states of all three beds.

[0043] In the embodiment of the present invention, since only three sets of front-end hydraulic pipelines are connected between the hydraulic pump 01 and the hydraulic pipeline switching device 02, the hydraulic pump 01 supports the control of a maximum of three hydraulic valves at a time. Therefore, it is impossible to synchronously control nine hydraulic valves at a time to switch the bed state of each bed layer. Specifically, in the embodiment of the present invention, the bed state is switched by switching multiple valve state combinations, so there will be multiple transitional valve state combinations.

[0044] Preferably, in an embodiment of the present invention, the specific steps of switching the bed state by performing multiple valve state combination conversions may include:

[0045] The bed in the air intake state before the switching is set as the reference bed, and each valve is switched from the current valve state combination to the first transition state, including: closing the purge valve of the upstream bed (bed C) of bed A of the reference bed, and opening the outlet valve of the upstream bed (bed C);

[0046] Switching the valve state combination of each valve from the first transition state to the second transition state includes: closing the outlet valve of the downstream bed layer (bed layer B) of the bed layer A;

[0047] Switching the valve state combination of each valve from the second transition state to the bed state after the bed conversion is completed includes: opening the purge valve of the reference bed (bed A), closing the air inlet valve of (A) and opening the air inlet valve of the downstream bed (bed B) of bed A.

[0048] It should be noted that, in the embodiment of the present invention, the time interval for each conversion of the valve state combination may be set to 5-60 seconds.

[0049] In the embodiment of the present invention, the outlet valve of the bed layer that is about to enter the air intake state is pre-closed. In order to achieve the effect of additional purge of the bed layer when the air intake valve and the air outlet valve of the bed layer are opened at the same time, the embodiment of the present invention also sets the differential pressure from closing to opening of the purge valve to 8-10 kPa, thereby effectively improving the cleaning effect of the bed layer.

[0050] In summary, in the embodiment of the present invention, the bed state switching is achieved by performing multiple valve state combination conversions. Since, in each valve state combination conversion in the embodiment of the present invention, only one to three hydraulic valve control actions need to be performed, the present invention only requires a hydraulic system capable of simultaneously driving three valve actions when switching the bed state, thereby effectively reducing the cost and footprint of the hydraulic system. Since, in each valve state combination conversion in the embodiment of the present invention, the state of the outlet valve of at least one bed layer is kept open after the switching of the valve state combination, it can be ensured that the gas path is smooth and there is no pressure buildup during the bed state switching process.

[0051] Furthermore, in the embodiment of the present invention, when switching the bed state by switching multiple valve state combinations, the outlet valve of the bed that is about to enter the air intake state is also pre-closed. In this way, when the air intake valve and the air outlet valve of the bed are opened at the same time, the bed can be additionally purged, thereby improving the pyrolysis effect and efficiency of the bed.

[0052] Example 2

[0053] Corresponding to the method embodiment, the present invention also provides a bed switching system for a three-bed reactor for realizing Figure 1 The bed switching method of the three-bed reactor in the corresponding embodiment is as follows: Figure 2 As shown, the bed switching system of the three-bed reactor in the embodiment of the present invention includes: a hydraulic pump 01, a hydraulic pipeline switching device 02 and a control device 03;

[0054] Three sets of front-end hydraulic pipelines are connected between the hydraulic pump 01 and the hydraulic pipeline switching device 02; the hydraulic pipeline switching device 02 is connected to the nine hydraulic valves of the three bed layers through nine sets of rear-end hydraulic pipelines; the hydraulic pump supports the control of up to three hydraulic valves at a time;

[0055] The hydraulic pipeline switching device 02 switches the rear hydraulic pipeline connected to the front hydraulic pipeline according to the control instruction generated by the control device 03; the control instruction is used to implement the steps of the bed switching method of the three-bed reactor.

[0056] According to the hydraulic valve that needs to perform the action involved in the control instruction, the hydraulic pipeline switching device 02 can connect the front-end hydraulic pipeline with different rear-end hydraulic pipelines respectively to control the action of the corresponding hydraulic valve and convert the corresponding hydraulic valve into the corresponding open and closed state.

[0057] The three beds in the embodiment of the invention are each equipped with three hydraulic valves, specifically including an air inlet valve 11, a purge valve 12 and an air outlet valve 13 of bed A; an air inlet valve 21, a purge valve 22 and an air outlet valve 23 of bed B; and an air inlet valve 31, a purge valve 32 and an air outlet valve 33 of bed C.

[0058] It should be noted that the specific implementation method and technical effects of the bed switching system of the three-bed reactor in the embodiment of the present invention can be referred to Figure 1 The corresponding bed switching method of the three-bed reactor will not be described in detail here.

[0059] Example 3

[0060] Corresponding to the method embodiment, another aspect of the present invention provides a bed switching device for a three-bed reactor. Figure 3 The structure diagram of the bed switching device of the three-bed reactor provided by the embodiment of the present invention is shown. The bed switching device of the three-bed reactor is Figure 1 The device corresponding to the bed switching method of the three-bed reactor described in the corresponding embodiment, that is, the device is realized by means of a virtual device. Figure 1 In the corresponding embodiment, the bed switching method for a three-bed reactor, each virtual module constituting the bed switching device of the three-bed reactor can be executed by an electronic device, such as a network device, a terminal device, or a server. Specifically, the bed switching device of the three-bed reactor in the embodiment of the present invention includes:

[0061] The switching sequence determining unit 001 is used to determine the upstream and downstream relationship of each bed layer according to the bed state switching sequence of the three beds;

[0062] The switching process control unit 002 is used to generate control instructions for switching the bed state according to preset rules; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed when in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rules include that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instructions are used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0063] It should be noted that the specific implementation method and technical effects of the bed switching device of the three-bed reactor in the embodiment of the present invention can be referred to Figure 1 The corresponding bed switching method of the three-bed reactor will not be described in detail here.

[0064] Example 4

[0065] Corresponding to the method embodiments, embodiments of the present invention also provide a bed switching device for a three-bed reactor, such as a terminal, server, etc. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be, but is not limited to, a smartphone, tablet computer, laptop computer, desktop computer, etc.

[0066] An example of a hardware block diagram of a bed switching device for a three-bed reactor provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, this may include:

[0067] Processor 1, communication interface 2, memory 3 and communication bus 4;

[0068] The processor 1, the communication interface 2, and the memory 3 communicate with each other via the communication bus 4;

[0069] Optionally, the communication interface 2 may be an interface of a communication module, such as an interface of a GSM module;

[0070] The processor 1 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0071] The memory 3 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0072] The processor 1 is specifically configured to execute the computer program stored in the memory 3 to perform the following steps:

[0073] S11, determining the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers;

[0074] S12. Generate a control instruction for switching the bed state according to a preset rule; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instruction is used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0075] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the bed switching method of the three-bed reactor provided by the embodiment of the present invention.

[0076] Example 5

[0077] In an embodiment of the present invention, a storage medium is further provided. The storage medium may store a program suitable for execution by a processor, wherein the program is used to:

[0078] S11, determining the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers;

[0079] S12. Generate a control instruction for switching the bed state according to a preset rule; the bed state switching is achieved by converting multiple valve state combinations; the bed state switching includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state; the valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open; the preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed remains in the open state; the control instruction is used to control the on / off states of the air intake valve, air outlet valve, and purge valve of each of the beds.

[0080] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0081] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the methods provided by other embodiments of the present invention.

[0082] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0083] In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0084] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0085] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0086] It should be understood that in the embodiments of the present application, the various embodiments and features can be combined with each other to solve the aforementioned technical problems.

[0087] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0088] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bed switching method for a three-bed reactor, characterized in that: Including steps: S11, determining the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers; S12, generating a control instruction for switching the bed state according to a preset rule; The switching of the bed state is achieved by converting multiple valve state combinations. The switching of the bed state includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state. The valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open. The preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed is kept in the open state. The control instruction is used to control the switching state of the air intake valve, air outlet valve and purge valve of each of the beds.

2. The bed switching method of a three-bed reactor according to claim 1, characterized in that: The upstream and downstream relationships of each bed include: For the bed layer currently in the air intake state, the downstream bed layer is in the air discharge state, and the upstream bed layer is in the purge state.

3. The bed switching method of a three-bed reactor according to claim 2, characterized in that: The switching of the bed state further includes: Switch the bed in the gas outlet state to the purge state.

4. The bed switching method of a three-bed reactor according to claim 3, characterized in that: The switching of the bed state further includes: Switch the bed in the purge state to the air intake state.

5. The bed switching method of a three-bed reactor according to claim 4, characterized in that: The switching of the bed state is achieved by switching multiple valve state combinations, including: The bed layer in the air intake state before the switching is set as the reference bed layer, and each valve is switched from the current valve state combination to the first transition state, including: closing the purge valve of the bed layer upstream of the reference bed layer, and opening the air outlet valve of the upstream bed layer; Switching the valve state combination of each valve from the first transition state to the second transition state includes: closing the outlet valve of the downstream bed layer of the reference bed layer; Switching the valve state combination of each valve from the second transition state to the state after the bed conversion includes: opening the purge valve of the reference bed and closing the air intake valve at the same time; opening the air intake valve of the downstream bed of the reference bed.

6. The bed switching method of a three-bed reactor according to claim 5, characterized in that: The conversion of multiple valve state combinations includes: The time interval for switching each valve state combination is 5-60S.

7. The bed switching method of a three-bed reactor according to claim 6, characterized in that: Switching the bed layer in the gas outlet state to the purge state includes: The differential pressure of the purge valve from closed to open includes: 8-10KPa.

8. A bed switching device for a three-bed reactor, characterized in that: include: A switching sequence determining unit is used to determine the upstream and downstream relationship of each bed layer according to the order of bed state switching of the three bed layers; A switching process control unit, used to generate control instructions for switching the bed state according to preset rules; The switching of the bed state is achieved by converting multiple valve state combinations. The switching of the bed state includes: switching the valve state combination corresponding to the bed currently in the air intake state to the valve state combination corresponding to the downstream bed in the air intake state. The valve state combination corresponding to the bed in the air intake state includes: the air intake valve of the bed in the air intake state is open, the air outlet valve of the downstream bed is open, and the purge valve of the upstream bed is open. The preset rule includes that no more than three valve actions are controlled in each switching of the valve state combination, and after each switching of the valve state combination, the air outlet valve of at least one bed is kept in the open state. The control instruction is used to control the switching state of the air intake valve, air outlet valve and purge valve of each of the beds.

9. A bed switching system for a three-bed reactor, used to implement the bed switching method for a three-bed reactor as claimed in any one of claims 1 to 7, characterized in that: include: Hydraulic pumps, hydraulic line switching devices and control devices; Three sets of front-end hydraulic pipelines are connected between the hydraulic pump and the hydraulic pipeline switching device; the hydraulic pipeline switching device is connected to the nine hydraulic valves of the three bed layers through nine sets of rear-end hydraulic pipelines; the hydraulic pump supports the control of up to three hydraulic valves at a time; The hydraulic pipeline switching device switches the rear hydraulic pipeline connected to the front hydraulic pipeline according to the control instruction generated by the control device; the control instruction is used to implement the steps of the bed switching method of the three-bed reactor as described in any one of claims 1-7.

10. A bed switching device for a three-bed reactor, characterized in that: include: memory for storing computer programs; A processor is used to call and execute the computer program to implement the steps of the bed switching method of the three-bed reactor as described in any one of claims 1 to 7.

11. A storage medium, characterized in that: The invention comprises a software program, wherein the software program is suitable for executing the steps of the bed switching method of the three-bed reactor according to any one of claims 1 to 7 by a processor.

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