Adsorbent vacuum regeneration system

Abstract

The present invention relates to the field of carbon capture technology, and specifically to an adsorbent vacuum regeneration system, which includes multiple regeneration towers and a control module; each regeneration tower is used to sequentially perform various regeneration processing operations under the control of the control module to regenerate the adsorbent; wherein the regeneration processing operations sequentially include feeding operation, heating operation, vacuum operation and discharge operation; and under the control of the control module, at the same time, multiple regeneration towers respectively perform various regeneration processing processes. In this way, by controlling multiple regeneration towers to respectively perform various regeneration processing processes at the same time, the adsorbent can maintain continuous and uniform flow during the entire vacuum regeneration process, providing a continuous and stable adsorption material flow for the adsorption process, and at the same time, the product gas flow is relatively stable, creating conditions for the subsequent compression liquefaction process.

Description

Technical Field

[0001] The invention relates to the technical field of carbon capture, and in particular to an adsorbent vacuum regeneration system. Background Art

[0002] With the continuous advancement of the international process of responding to climate change, the development level of Carbon Capture Utilization and Storage (CCUS) technology has been significantly improved. CCUS technology has become an important part of the carbon neutrality technology system. It is currently the only technical option for near-zero emissions of fossil energy. It is a feasible technical solution for deep decarbonization of difficult-to-reduce industries such as steel and cement, and the main technical means to support carbon recycling in the future.

[0003] Adsorption carbon capture technology is a technical method that uses solid adsorbents to adsorb CO2 in multi-component gases (such as flue gas), and then regenerates the saturated adsorbent by pressure swing or temperature swing to obtain a high-concentration CO2 product gas. According to the different adsorbent regeneration methods, it can be divided into pressure swing adsorption (PSA), vacuum pressure swing adsorption (VSA), temperature swing adsorption (TSA) and vacuum pressure swing temperature swing adsorption (VTSA), etc. These technologies are all through the change of temperature or pressure to achieve the adsorption and separation of the adsorbate on the surface of the adsorbent. Among them, the adsorption capacity of the adsorbent directly affects the size of the device, so the thorough regeneration of the adsorbent to maintain sufficient adsorption capacity is the technical focus of adsorption carbon capture.

[0004] In the existing technology, to achieve this goal, it is often necessary to continuously increase the pressure difference or temperature difference to achieve a sufficient desorption rate. However, in the field of flue gas carbon capture applications, flue gas has the characteristics of large flow and low CO2 partial pressure. Increasing the flue gas pressure requires huge energy consumption and is not economical. Through the application of various efficient heat exchange technologies and refrigeration technologies, the temperature swing adsorption (TSA) method of lowering the flue gas temperature to achieve low-temperature adsorption and high-temperature desorption has more obvious feasibility. However, due to the existence of "thermal inertia", if the cycle of heating and cooling is achieved in the same container, the operating energy consumption is no longer economical. Therefore, the temperature swing adsorption (TSA) technology mostly uses a moving bed rather than a fixed bed solution.

[0005] In the application of carbon capture technology using moving bed adsorption, in order to achieve complete regeneration of adsorbent, blindly increasing the regeneration temperature and increasing the temperature difference between adsorption and regeneration will bring huge energy consumption, and too high regeneration temperature will cause the loss of adsorbent to increase exponentially. The technical solution of variable temperature regeneration coupled with vacuum regeneration regenerates the heated adsorbent by vacuuming it. Under negative pressure conditions, the adsorbent regeneration will be more thorough, which can maximize the adsorption capacity of the adsorbent, enhance selectivity, and greatly improve the purity of the product gas. However, due to the vacuuming process, the flow of the adsorbent in the regeneration tower will no longer be continuous, which will lead to unstable product gas flow and bring difficulties to subsequent compression and liquefaction processes. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide an adsorbent vacuum regeneration system to overcome the problems of unstable product gas flow and influence on subsequent compression liquefaction process in the current moving bed adsorption carbon capture technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions:

[0008] The embodiment of the present application provides an adsorbent vacuum regeneration system, comprising: a plurality of regeneration towers and a control module;

[0009] Each of the regeneration towers is used to sequentially perform various regeneration processing operations under the control of the control module to regenerate the adsorbent; wherein the regeneration processing operations sequentially include a feeding operation, a heating operation, a vacuum operation and a discharge operation;

[0010] And under the control of the control module, at the same time, the plurality of regeneration towers respectively execute the respective regeneration processing processes.

[0011] Further, in some embodiments of the present application, the number of the regeneration towers is 5;

[0012] One feeding operation, two heating operations, one vacuum operation and one discharge operation sequentially constitute a regeneration cycle; wherein the system control is divided into 5 time sequences, for each regeneration tower, each time sequence corresponds to one regeneration operation, and the corresponding operation durations are equal, and the two heating operations correspond to two adjacent time sequences;

[0013] Each of the regeneration towers is used to cyclically execute the regeneration cycle based on the timing;

[0014] And at any time sequence, the five regeneration towers respectively perform the feeding operation, the vacuum operation, the discharging operation and the two heating operations.

[0015] Further, in some embodiments of the present application, the number of the regeneration towers is 4;

[0016] One feeding operation, one heating operation, one vacuum operation and one discharge operation sequentially constitute a regeneration cycle; wherein the system control is divided into 4 time sequences, and for each regeneration tower, each time sequence corresponds to one regeneration processing operation, and the corresponding operation durations are equal;

[0017] Each of the regeneration towers is used to cyclically execute the regeneration cycle based on the timing;

[0018] And at any time sequence, the four regeneration towers respectively perform the feeding operation, the heating operation, the vacuum operation and the discharging operation.

[0019] Furthermore, in some embodiments of the present application, a program-controlled valve is provided on the regeneration tower, and the program-controlled valve includes a feed valve, a discharge valve, a vacuum valve and an air valve;

[0020] A first pipe opening is arranged at the bottom end of the regeneration tower, and a second pipe opening, a third pipe opening and a fourth pipe opening are arranged at the top end of the regeneration tower; wherein the first pipe opening is connected to the discharge valve, the second pipe opening is connected to the feed valve, the third pipe opening is connected to the air valve, and the fourth pipe opening is connected to the vacuum valve.

[0021] Furthermore, in some embodiments of the present application, an air filter device is installed on the air-facing side of the air valve.

[0022] Furthermore, in some embodiments of the present application, a metal dust filter is installed on the inner side of the regeneration tower of the third pipe outlet.

[0023] Furthermore, in some embodiments of the present application,

[0024] When the regeneration tower is in feeding operation, the feed valve and the air valve are both opened, and the discharge valve and the vacuum valve are both closed;

[0025] When the regeneration tower is in heating operation, the feed valve, the discharge valve, the vacuum valve and the air valve are all closed;

[0026] When the regeneration tower is in vacuum operation, the vacuum valve is opened, and the feed valve, the discharge valve and the air valve are all closed;

[0027] When the regeneration tower is performing a discharging operation, the discharging valve and the air valve are both opened, and the feeding valve and the vacuum valve are both closed.

[0028] Furthermore, in some embodiments of the present application, a dust filter and a vacuum negative pressure station are also included;

[0029] The first end of the dust filter is connected to the vacuum valve of each regeneration tower, and the second end of the dust filter is connected to the vacuum negative pressure station;

[0030] The vacuum valve of each regeneration tower is also connected to the air valve of the corresponding regeneration tower, sharing a regeneration tower pipe port. During vacuum regeneration, the airflow is extracted from the regeneration tower, and the fine dust or particles that may exist in the regeneration tower are intercepted by the metal dust filter element at the top of the regeneration tower or retained on the filter element surface. After the vacuuming is completed, the discharge sequence is entered, the system closes the vacuum valve and opens the air valve, and the outside air is quickly poured into the regeneration tower from the same pipe port to backwash the metal dust filter element, thereby effectively ensuring the filtration efficiency of the dust filter element.

[0031] Furthermore, in some embodiments of the present application, a plurality of layers of spiral metal coils, a heat medium inlet and a heat medium outlet are provided in the regeneration tower, so that the heat medium flows into the metal coil through the heat medium inlet and flows out from the heat medium outlet; wherein the heat medium in the metal coil is used to heat the adsorbent in the regeneration tower through the wall surface of the metal coil.

[0032] Furthermore, in some embodiments of the present application, a shell and tube heat exchanger is provided in the regeneration tower. When the adsorbent in the tower is heated, the adsorbent is distributed in the tube side of the shell and tube heat exchanger, and the hot air is distributed in the shell side of the shell and tube heat exchanger.

[0033] The present invention relates to the field of carbon capture technology, and specifically to an adsorbent vacuum regeneration system, which includes multiple regeneration towers and a control module; each regeneration tower is used to sequentially perform various regeneration processing operations under the control of the control module to regenerate the adsorbent; wherein the regeneration processing operations sequentially include feeding operation, heating operation, vacuum operation and discharge operation; and under the control of the control module, at the same time, multiple regeneration towers respectively perform various regeneration processing processes. In this way, by controlling multiple regeneration towers to respectively perform various regeneration processing processes at the same time, the adsorbent can maintain continuous and uniform flow during the entire vacuum regeneration process, providing a continuous and stable adsorption material flow for the adsorption process, and at the same time, the product gas flow is relatively stable, creating conditions for the subsequent compression liquefaction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0035] Figure 1 A schematic diagram of the structure of an adsorbent vacuum regeneration system provided in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the structure of a regeneration tower in an adsorbent vacuum regeneration system provided in an embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of an adsorbent vacuum regeneration system provided in another embodiment of the present application;

[0038] Figure 4 A control timing diagram of the adsorbent vacuum regeneration system provided in an embodiment of the present application;

[0039] Figure 5 A logic diagram of the actions of valves in a single regeneration tower in a regeneration cycle in an adsorbent vacuum regeneration system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0041] Figure 1 For a schematic diagram of the structure of the adsorbent vacuum regeneration system provided in an embodiment of the present invention, please refer to Figure 1 , the adsorbent vacuum regeneration system includes multiple regeneration towers and a control module.

[0042] Each regeneration tower is used to perform various regeneration processing operations in sequence under the control of the control module to regenerate the adsorbent; wherein the regeneration processing operations include feeding operation, heating operation, vacuum operation and discharge operation in sequence. And under the control of the control module, at the same time, multiple regeneration towers respectively perform various regeneration processing processes.

[0043] It should be noted that the above-mentioned control module can be a specific control device or system, or it can be a control program integrated in other parts of the adsorbent vacuum regeneration system provided in the present application, which is used to control multiple regeneration towers to regenerate the adsorbent.

[0044] On this basis, each regeneration tower is used to sequentially perform feeding operation (i.e. placing the adsorbent in the regeneration tower), heating operation (i.e. heating the adsorbent in the tower), vacuum operation (i.e. evacuating the tower to form a vacuum or near-vacuum environment in the tower) and discharging operation (i.e. discharging the regenerated adsorbent from the regeneration tower).

[0045] In the present application, each regeneration tower sequentially performs the above-mentioned regeneration processing operation. At the same time, for multiple regeneration towers, at the same time, multiple regeneration towers respectively execute various regeneration processing processes. For example, at the same time, one regeneration tower is in a feeding state, i.e., performing a feeding operation, one regeneration tower is in a discharging state, i.e., performing a discharging operation, one regeneration tower is in a heating state, i.e., performing a heating operation, and one regeneration tower is in a vacuum state, i.e., performing a vacuum operation. In this way, by adopting a regeneration method of a multi-tower combination, the regeneration system, i.e., the adsorbent vacuum regeneration system, has continuous material flow, continuous product gas output, good system stability, and is conducive to the subsequent processing and utilization of the product gas.

[0046] It should be noted that the adsorbent vacuum regeneration system provided in the present application is based on a vacuum pressure swing temperature swing adsorption (VTSA) process using a moving bed. By vacuuming and regenerating the heated adsorbent, under negative pressure conditions, the adsorbent regeneration will be more thorough and can maximize the utilization of the adsorption capacity of the adsorbent.

[0047] Figure 2 This is a schematic diagram of the structure of the regeneration tower in the adsorbent vacuum regeneration system provided in the embodiment of the present application. Figure 3 A schematic diagram of the structure of an adsorbent vacuum regeneration system provided in another embodiment of the present application is shown in FIG. Figure 2 and Figure 3 As shown, in the adsorbent vacuum regeneration system of the embodiment of the present application, multiple regeneration towers are of the same size, such as regeneration tower AE, which, in addition to the regeneration tower 1, may also include a dust filter 2, a vacuum negative pressure station 3 and associated pipes and valves.

[0048] Specifically, for each regeneration tower 1, the system includes program-controlled valves arranged on the regeneration tower 1, including a feed valve F1, a discharge valve F2, a vacuum valve F3 and an air valve F4, wherein an air filter device is installed on the air side of the air valve F4 to prevent rain and dust. The first end of the dust filter 2 is connected to the vacuum valve F3 of each regeneration tower 1, and the second end is connected to the vacuum negative pressure station 3, and the vacuum valve F3 of each regeneration tower 1 is also connected to the air valve F4 of the same regeneration tower 1.

[0049] As for each regeneration tower 1, the tower body can be set as a cylindrical container (of course, the tower body can also be set as a structure with other cross-sections such as a rectangular cross-section, etc.), and a multi-layer spiral metal coil 11 is installed in the tower. The high-temperature heat medium (such as steam, heat transfer oil, etc.) flows into and out of the coil through the heat medium inlet and the heat medium outlet, and contacts the adsorbent through the coil wall surface in the regeneration tower 1 to heat the adsorbent. By building a heating coil in the regeneration tower 1, the adsorbent is directly contacted and heated with the outer wall of the heating coil, thereby improving the heating efficiency. In practical applications, the spacing of the heating coil 11 can be set to 25-100mm, and the pipe diameter can be selected to be 15-26mm.

[0050] Alternatively, in some other embodiments of the present application, the regeneration tower 1 can be designed as a shell-and-tube heat exchanger. When the adsorbent in the tower is heated, the adsorbent is distributed in the tube side of the shell-and-tube heat exchanger, and the heat medium is distributed in the shell side of the shell-and-tube heat exchanger to achieve the same function of the above-mentioned multi-layer spiral metal coil 11.

[0051] Each regeneration tower 1 is provided with a first pipe opening 12 at the bottom, and a second pipe opening 13 and a third pipe opening 14 at the top; wherein the first pipe opening 12 is the discharge port of the adsorbent, connected to the discharge valve. The second pipe opening 13 is the loading port of the adsorbent, connected to the feed valve. The third pipe opening 14 is the interface of the air program-controlled valve F4 and the vacuum valve F3. Among them, a metal dust filter element 15 with a filtration accuracy of 100 mesh is installed in the tower body below the third pipe opening 14 (in actual application, the filter element with a specification of 50-200 mesh can be selected according to demand) to prevent the adsorbent from being sucked into the vacuum pipe. In actual application, the adsorbent is loaded from the top of the regeneration tower 1 and discharged from the bottom.

[0052] On this basis, if Figure 3 and Figure 4 As shown, in the adsorbent vacuum regeneration system provided by the present application, the number of regeneration towers can be 5, namely AE. Correspondingly, one feeding operation, two heating operations, one vacuum operation and one discharge operation sequentially constitute a regeneration cycle; wherein, the system control is divided into 5 time sequences, and for each regeneration tower, each time sequence corresponds to a regeneration treatment operation, and the corresponding operation durations are equal, and the two heating operations correspond to two adjacent time sequences; each regeneration tower is used to cyclically execute the regeneration cycle based on the time sequence; and under any time sequence, the five regeneration towers respectively execute the feeding operation, vacuum operation, discharge operation and two heating operations, so as to continuously heat and vacuum regenerate the adsorbent through multi-tower regeneration.

[0053] Specifically, the four program-controlled valves installed on the regeneration tower can be operated according to the set program to achieve continuous feeding, discharging and vacuum regeneration. Figure 4 As shown, for each regeneration tower, 5 regeneration processing operations are performed in a complete regeneration cycle. At the same time, the system control is divided into 5 time sequences, namely T1-T5. Among them, the time represented by each time sequence is the same, and the heating state has 2 time sequences. And in each time sequence, there is always 1 feeding, 1 discharging, 1 vacuuming, and 2 heating states in the 5 regeneration towers. After the time sequence runs from T1 to T5, it returns to T1 and circulates again. Figure 3 It shows the valve switch status on each regeneration tower and the material status in the regeneration tower at the end of time sequence T1.

[0054] It can be understood that in this embodiment, the time for feeding, vacuuming and discharging in one cycle is the same, occupying 1 timing time, and the heating time is twice the feeding time, occupying 2 timing times.

[0055] In some other embodiments of the present application, the number of regeneration towers can also be 4, and correspondingly, one feeding operation, one heating operation, one vacuum operation and one discharging operation constitute a regeneration cycle in sequence; at the same time, the system control is divided into 4 time sequences, and for each regeneration tower, each time sequence corresponds to a regeneration processing operation, and the corresponding operation durations are equal; each regeneration tower is used to cyclically execute the regeneration cycle based on the time sequence; and in any time sequence, the four regeneration towers respectively execute the feeding operation, heating operation, vacuum operation and discharging operation.

[0056] It is understandable that, under the concept of the present invention, the number of regeneration towers can be changed and adjusted, and the system can be regarded as working continuously as long as the number of regeneration towers is the same as the time sequence number.

[0057] In addition, it should be noted that in the present application, when the regeneration tower is performing a feeding operation, the feed valve F1 and the air valve F4 are opened, and the discharge valve F2 and the vacuum valve F3 are closed; when the regeneration tower is performing a heating operation, the feed valve F1, the discharge valve F2, the vacuum valve F3 and the air valve F4 are closed; when the regeneration tower is performing a vacuum operation, the vacuum valve F3 is opened, and the feed valve F1, the discharge valve F2 and the air valve F4 are closed; when the regeneration tower is performing a discharging operation, the discharge valve F2 and the air valve F4 are opened, and the feed valve F1 and the vacuum valve F3 are closed.

[0058] Figure 5 is an action logic diagram of each valve in a single regeneration tower in a regeneration cycle of an adsorbent vacuum regeneration system provided by an embodiment of the present invention, Figure 5 The diagram shows the valve switch action sequence of a regeneration tower in a timing period, i.e., a regeneration cycle. When the system time runs into a certain timing, the corresponding valve action begins to execute, and then the valve state is maintained until the next timing arrives.

[0059] Specifically, at the T1 timing, the regeneration tower first closes the discharge valve F2 opened at the previous discharge timing, and then opens the feed valve F1 to start loading. At the T2 timing, the air valve F4 and the feed valve F1 are closed, and the regeneration tower continues to be closed and heated. At the T3 timing, the vacuum valve F3 is opened to vacuum the regeneration tower for regeneration. At the T4 timing, the vacuum valve F3 is first closed to end the vacuuming, and then the air valve F4 is opened to inhale air to balance the pressure in the tower, and then the discharge valve F2 is opened to discharge.

[0060] Among them, in the present application, the feed valve F1 can also be interlocked with the high material level switch on the regeneration tower. When the regeneration tower reaches the high material level, the interlock closes the feed valve F1. In addition, an alarm message can be issued for each timing execution situation, and the corresponding prescribed action can be executed. If the time runs to the timing T2, and the regeneration tower material level is still not full, an alarm message will be issued, and the program will still be executed according to the timing specified action sequence; at the end of the T3 timing, if the vacuum degree of the regeneration tower body does not reach the set vacuum degree, an alarm message will be issued, and the program will still be executed according to the timing specified action sequence; if the time runs to the end of the timing T4 and there is still no regeneration tower low material level signal, an alarm message will be issued, and the program will still be executed according to the timing specified action sequence. And during the valve action process, if a valve action failure occurs, a serious alarm prompt will be issued, and the timing will automatically suspend execution.

[0061] The adsorbent vacuum regeneration system provided by the present application adopts a moving bed-based variable temperature heating coupled vacuum negative pressure desorption regeneration method for the adsorbent regeneration. Compared with conventional PSA, VSA and TSA adsorption regeneration technologies, the adsorbent regeneration of the present application is more thorough, with high adsorption capacity utilization, small equipment scale, low construction cost, small adsorbent loss and low operating cost. Moreover, by adopting a multi-tower combination regeneration method, the system material flow is continuous, the product gas output is continuous, the system stability is good, and it is conducive to the subsequent processing and utilization of the product gas.

[0062] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0063] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0064] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0065] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0066] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0067] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0068] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An adsorbent vacuum regeneration system, characterized in that: include: Multiple regeneration towers and control modules; Each of the regeneration towers is used to sequentially perform various regeneration processing operations under the control of the control module to regenerate the adsorbent; wherein the regeneration processing operations sequentially include a feeding operation, a heating operation, a vacuum operation and a discharge operation; And under the control of the control module, at the same time, the plurality of regeneration towers respectively perform the regeneration processing operations; The number of the regeneration towers is 5; one feeding operation, two heating operations, one vacuum operation and one discharge operation sequentially constitute a regeneration cycle; the system control is divided into 5 time sequences, and for each regeneration tower, each time sequence corresponds to one regeneration processing operation, and the corresponding operation durations are equal, and the two heating operations correspond to two adjacent time sequences; each regeneration tower is used to cyclically execute the regeneration cycle based on the time sequence; and in any time sequence, the 5 regeneration towers respectively execute the feeding operation, the vacuum operation, the discharge operation and the two heating operations; Or the number of the regeneration towers is 4; one feeding operation, one heating operation, one vacuum operation and one discharging operation constitute a regeneration cycle in sequence; wherein, the system control is divided into 4 time sequences, and for each of the regeneration towers, each time sequence corresponds to one regeneration processing operation, and the corresponding operation durations are all equal; each of the regeneration towers is used to cyclically execute the regeneration cycle based on the time sequence; and in any time sequence, the four regeneration towers respectively execute the feeding operation, the heating operation, the vacuum operation and the discharging operation.

2. The adsorbent vacuum regeneration system according to claim 1, characterized in that: It also includes program-controlled valves arranged on the regeneration tower, and the program-controlled valves include a feed valve, a discharge valve, a vacuum valve and an air valve; A first pipe opening is provided at the bottom end of the regeneration tower, and a second pipe opening and a third pipe opening are provided at the top end of the regeneration tower; wherein the first pipe opening is connected to the discharge valve, the second pipe opening is connected to the feed valve, and the third pipe opening is connected to the air valve and the vacuum valve.

3. The adsorbent vacuum regeneration system according to claim 2, characterized in that: An air filter is provided on the air-facing side of the air valve.

4. The adsorbent vacuum regeneration system according to claim 2, characterized in that: A metal dustproof filter element is installed inside the regeneration tower of the third pipe opening.

5. The adsorbent vacuum regeneration system according to claim 2, characterized in that: When the regeneration tower is in feeding operation, the feed valve and the air valve are both opened, and the discharge valve and the vacuum valve are both closed; When the regeneration tower is in heating operation, the feed valve, the discharge valve, the vacuum valve and the air valve are all closed; When the regeneration tower is in vacuum operation, the vacuum valve is opened, and the feed valve, the discharge valve and the air valve are all closed; When the regeneration tower is performing a discharging operation, the discharging valve and the air valve are both opened, and the feeding valve and the vacuum valve are both closed.

6. The adsorbent vacuum regeneration system according to claim 1, characterized in that: It also includes dust filters and vacuum stations; The first end of the dust filter is connected to the vacuum valve of each regeneration tower, and the second end of the dust filter is connected to the vacuum negative pressure station; The vacuum valve of each regeneration tower is also connected to the air valve of the corresponding regeneration tower and shares the same regeneration tower pipe port.

7. The adsorbent vacuum regeneration system according to claim 1, characterized in that: The regeneration tower is provided with multiple layers of spiral metal coils, a heat medium inlet and a heat medium outlet, so that the heat medium flows into the metal coil through the heat medium inlet and flows out from the heat medium outlet; wherein the heat medium in the metal coil is used to heat the adsorbent in the regeneration tower through the wall surface of the metal coil.

8. The adsorbent vacuum regeneration system according to claim 1, characterized in that: A shell-and-tube heat exchanger is arranged in the regeneration tower. When the adsorbent in the tower is heated, the adsorbent is distributed in the tube side of the shell-and-tube heat exchanger, and the heat medium is distributed in the shell side of the shell-and-tube heat exchanger.

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