Gas recovery method and gas recovery system

Abstract

The present invention is provided with a recovery device that has fewer recovery containers than adsorption structures provided to a prescribed area. The recovery containers are airtight containers. A process repeats, in which: a number of adsorption structures from a prescribed area are selected; said selected adsorption structures are transported from the prescribed area; the transported adsorption structures are set inside a recovery container; the separation and recovery of gas from the adsorption structures set inside the recovery container is performed using a recovery device; and adsorption structures from which gas has been recovered are removed from the recovery container.

Description

Gas recovery method and gas recovery system

[0001] The present invention relates generally to gas recovery.

[0002] As a technique for recovering gases such as carbon dioxide, for example, the techniques disclosed in Patent Documents 1 and 2 are known.

[0003] WO2020 / 212146WO2016 / 005226

[0004] In both Patent Documents 1 and 2, a unit is required for each adsorption structure to house the adsorption structure and allow gas to be desorbed from the adsorption structure. Specifically, Patent Document 1 requires a separation unit equipped with a fan for each gas adsorption structure. Patent Document 2 requires a unit having a closed wall structure that can house the adsorption structure and withstand vacuum pressure for each adsorption structure.

[0005] Therefore, as the number of adsorptive structures increases, the number of units for accommodating the adsorptive structures also increases, resulting in a larger system size and a greater maintenance burden.

[0006] A recovery device is provided having a smaller number of recovery containers than the number of adsorption structures arranged in a predetermined area. The recovery containers are sealed containers. The following process is repeated: selecting some of the adsorption structures from the predetermined area, transporting the selected adsorption structures from the predetermined area, placing the transported adsorption structures in the recovery containers, using the recovery device to desorb and collect gas from the adsorption structures placed in the recovery containers, and removing the adsorption structures from which the gas has been collected.

[0007] According to the present invention, gas can be recovered from all of the adsorptive structures using a recovery device having fewer recovery containers than the adsorptive structures, thereby preventing an increase in the system size and maintenance burden.

[0008] 1 shows a schematic diagram of an entire system according to an embodiment of the present invention; 2 shows an example of adding a honeycomb structure; 3 shows a schematic diagram of a structure container in a recovery device; 4 shows a schematic diagram of a recovery device; 5 shows a configuration of a control device; 6 shows a first example of gas recovery; 7 shows a second example of gas recovery; ２ An example of the change in the discharge amount and the change in the temperature of the honeycomb structure is shown. ２ 10A and 10B are schematic diagrams showing an example of a recovery amount; an example of history data; a flow of a structure gas recovery process; a part of a flow of an abnormality diagnosis process; a remaining part of the flow of an abnormality diagnosis process; an example of a honeycomb structure; an example of a honeycomb structure; an example of a honeycomb structure;

[0009] In the following description, an "interface apparatus" may be one or more interface devices. The one or more interface devices may be at least one of the following: - One or more I / O (Input / Output) interface devices. The I / O (Input / Output) interface device is an interface device for at least one of an I / O device and a remote display computer. The I / O interface device for the display computer may be a communication interface device. The at least one I / O device may be a user interface device, for example, either an input device such as a keyboard and a pointing device, or an output device such as a display device. - One or more communication interface devices. The one or more communication interface devices may be one or more homogeneous communication interface devices (e.g., one or more NICs (Network Interface Cards)) or two or more heterogeneous communication interface devices (e.g., a NIC and an HBA (Host Bus Adapter)).

[0010] In the following description, the term "memory" refers to one or more memory devices, which are an example of one or more storage devices, and may typically be a primary storage device. At least one memory device in the memory may be a volatile memory device or a non-volatile memory device.

[0011] In the following description, a "persistent storage device" may refer to one or more persistent storage devices, which are an example of one or more storage devices. A persistent storage device may typically be a non-volatile storage device (e.g., an auxiliary storage device), and more specifically, may be, for example, a hard disk drive (HDD), a solid state drive (SSD), a non-volatile memory express (NVME) drive, or a storage class memory (SCM).

[0012] In the following description, the term "storage device" may refer to at least one of memory and persistent storage device.

[0013] Furthermore, in the following description, a "processor" may refer to one or more processor devices. The at least one processor device may typically be a microprocessor device such as a CPU (Central Processing Unit), but may also be other types of processor devices such as a GPU (Graphics Processing Unit). The at least one processor device may be a single-core or multi-core. The at least one processor device may also be a processor core. The at least one processor device may also be a processor device in a broader sense, such as a hardware circuit that performs part or all of the processing (for example, an FPGA (Field-Programmable Gate Array), a CPLD (Complex Programmable Logic Device), or an ASIC (Application Specific Integrated Circuit)).

[0014] Furthermore, in the following description, functions may be described using the expression "yyy unit." However, the functions may be realized by one or more computer programs executed by a processor, by one or more hardware circuits (e.g., FPGAs or ASICs), or by a combination thereof. When a function is realized by a program executed by a processor, the specified processing is performed using a storage device and / or an interface device, etc., as appropriate, and therefore the function may be considered to be at least a part of the processor. Processing described using a function as the subject may be processing performed by a processor or a device having the processor. A program may be installed from a program source. The program source may be, for example, a program distribution computer or a computer-readable recording medium (e.g., a non-transitory recording medium). The description of each function is an example, and multiple functions may be combined into one function, or one function may be divided into multiple functions.

[0015] In the following description, when elements of the same type are described without distinction, common reference symbols are used, and when elements of the same type are described with distinction, reference symbols are used.

[0016] An embodiment of the present invention will be described below with reference to the drawings. In the following embodiment, the gas to be recovered is CO ２ (carbon dioxide), but in the present invention, CO ２ Alternatively or additionally, other types of gases (e.g., methane, nitrous oxide, sulfur hexafluoride, nitrogen trifluoride, perfluorocarbons, hydrofluorocarbons, or hydrocarbons) may be targeted for recovery. The adsorption structure (the honeycomb structure 100 in the embodiment) may include a type of adsorbent appropriate for the gas to be recovered. Furthermore, a gas recovery method appropriate for the gas to be recovered may be adopted, such as pressure swing adsorption (PSA) or cryogenic separation.

[0017] FIG. 1A shows a schematic diagram of an overall system according to one embodiment of the present invention.

[0018] A plurality of honeycomb structures 100 are arranged in a predetermined area 120. The predetermined area 120 is preferably an indoor area. ２ Recovery amount (and CO ２ This may be an area where surveys and reporting of emissions (e.g., emissions) are preferred, for example, within a factory.

[0019] The honeycomb structure 100 is ２ The honeycomb structure 100 is an example of an adsorption structure that adsorbs a substance. The honeycomb structure 100 is a structure made of, for example, ceramics. The honeycomb structure 100 is a columnar structure and has a large number of through holes (a large number of through holes that penetrate in the height direction) separated by partition walls.

[0020] The cross-sectional shape of the honeycomb structure 100 (the shape of the honeycomb structure 100 in a plan view) may be any shape, but is preferably a quadrangular shape (square or rectangular) as in this embodiment. This is because, as shown in FIG. 1A, the honeycomb structures 100 can be two-dimensionally arranged in a tile-like manner in a predetermined area 120 without gaps, and as a result, the honeycomb structures 100 can be arranged at a high density. ２ In order to easily manage the amount of adsorption, etc., all the honeycomb structures 100 may be identical (specifically, the same shape, size, and material). Alternatively, honeycomb structures 100 with different cross-sectional shapes may be mixed in a predetermined area 120 so that the honeycomb structures 100 can be laid out more densely in accordance with the shape of the predetermined area 120.

[0021] One or more recovery devices 150 are provided outside the predetermined area 120. One or more honeycomb structures 100 are selected from the predetermined area 120, and the selected honeycomb structures 100 are set in the recovery device 150. The recovery device 150 may be called a recovery station. The recovery device 150 recovers CO2 adsorbed in the honeycomb structure 100 from the set honeycomb structure 100. ２ For ease of explanation, it is assumed that there is one recovery device 150 in this embodiment.

[0022] Each honeycomb structure 100 is arranged in a predetermined area 120 so as to be transported from the predetermined area 120 by a transport device (not shown). The maximum number of honeycomb structures 100 that can be arranged depends on the size of the predetermined area 120 and is not restricted by the device design. Therefore, the number of honeycomb structures 100 can be easily changed. Specifically, for example, if there is an empty area in the predetermined area 120, a honeycomb structure 100 can be easily added to the empty area as shown by the dashed frame in FIG. 1B. It is also easy to reduce the number of honeycomb structures 100 or to replace the honeycomb structures 100. Furthermore, both the addition, reduction, and replacement of the honeycomb structures 100 in the predetermined area 120 can be performed without affecting the CO recovery device 150. ２ This can be done in parallel with the recovery of the honeycomb structures 100 because the number of honeycomb structures 100 is not restricted by the design of the recovery device 150.

[0023] FIG. 2 is a schematic diagram showing the configuration of a structure container 200 in the recovery device 150 .

[0024] The structure container 200 is composed of a preheating container 230Y and a collection container 230X. In the example shown in FIG. 2, there is one preheating container 230Y and one collection container 230X, but there may be two or more preheating containers 230Y and two or more collection containers 230X. Each of the preheating container 230Y and the collection container 230X may be an independent sealed container. In other words, the structure container 200 may be a collection of one or more sealed containers. When the collection container 230X and the preheating container 230Y are independent, CO 2 is also discharged from the preheating container 230Y in addition to the collection container 230X. ２ may be sucked, and the pressure, temperature, etc. of the recovery container 230X and the preheating container 230Y may be controlled individually. In this embodiment, the preheating container 230Y and the recovery container 230X correspond to vertically arranged chambers formed by dividing the inside of the structure container 200. The containers and the chambers can be collectively referred to as "compartments." Note that the partition wall 290 that divides the structure container 200 into the preheating container 230Y and the recovery container 230X can be opened and closed. In addition, the preheating container 230Y is located above the recovery container 230X.

[0025] As shown by arrow 210, CO ２The honeycomb structure 100 having adsorbed CO is set (stored) and preheated. For this preheating, a part of the heat in the recovery container 230X may be used, as shown by the arrow 214. Specifically, for example, the heat in the recovery container 230X may be recovered by a heat pump or stored in a heat accumulator, and the recovered or stored heat may be provided to the preheating container 230Y from the heat pump or the heat accumulator. Since the honeycomb structure 100 is preheated, the CO in the recovery container 230X may be used. ２ The preheated honeycomb structure 100 is transferred to a recovery container 230X as indicated by an arrow 211. In the example shown in Fig. 2, the preheated honeycomb structure 100X is transferred to the recovery container 230X by opening the openable partition wall 290, and the next honeycomb structure 100Y to be preheated is set in the empty preheating container 230Y.

[0026] The collection container 230X contains CO ２ In this embodiment, the honeycomb structure 100 that has been preheated is set in the preheating container 230Y. ２ The suction is started at the timing when the partition wall 290 is opened to move the honeycomb structure 100Y in the preheating container 230Y to the recovery container 230X after the honeycomb structure 100X in the recovery container 230X, from which heat recovery has been completed, is removed from the recovery container 230X. That is, the CO ２ is released into the preheating vessel 230Y. ２ It is preferable to suck out the CO ２ The outlet of the CO 2 in the preheating container 230Y is a single suction port provided in the collection container 230X. ２ The CO 2 is sucked from the suction port of the recovery container 230X through the opened partition wall 290. The timing for setting the honeycomb structure 200Y in the preheating container 230Y is determined by the timing indicated by the arrow 213. ２ Suction is performed and the CO ２The timing may be when the pressure in the honeycomb structure 100 drops below a certain pressure and the partition wall 290 is closed. Although not shown, the recovery container 230X has an openable / closable outlet (e.g., a door) for the honeycomb structure 100X, for example, on one side of the recovery container 230X, and when the outlet is opened, the honeycomb structure 100X is taken out from the recovery container 230X as indicated by arrow 212. Similarly, the preheating container 230Y has an openable / closable inlet (e.g., a door) for the honeycomb structure 100, for example, on one side of the preheating container 230Y, and when the inlet is opened, the honeycomb structure 100Y is set in the preheating container 230X as indicated by arrow 210.

[0027] In the recovery container 230X, CO adsorbed on the set honeycomb structure 100X is ２ The honeycomb structure 100X is heated to release the CO. For example, the recovery container 230X has a coil 220, and the honeycomb structure 100X has a dielectric and / or magnetic material. The honeycomb structure 100X is placed in the coil 220 (the honeycomb structure 100X is wound around the coil 220), and induction heating is performed. ２ is collected (e.g., aspirated) as shown by arrow 213. ２ The honeycomb structure 100 from which the particles have been released is cooled. The cooled honeycomb structure 100X is taken out of the recovery container 230X as indicated by an arrow 212.

[0028] The preheating container 230Y and the recovery container 230X may be adjacent to each other or may be spaced apart. The preheating container 230Y and the recovery container 230X are arranged vertically, but may also be arranged horizontally. In the example shown in FIG. 2 , the recovery container 230X has a coil 220, and the axial direction of the coil 220 is the vertical direction, so the preheating container 230Y is arranged above the recovery container 230X. Specifically, for example, in a plan view, the honeycomb structure 100 is set in the preheating container 230Y at a position overlapping the coil 220. After preheating, the honeycomb structure 100Y is lowered vertically downward from the preheating container 230Y into the recovery container 230X through the open partition wall 290, so that the preheated honeycomb structure 100Y is set in the coil 220. Note that when the axial direction of the coil 220 is the horizontal direction, the preheating container 230Y may be arranged to the left or right of the recovery container 230X.

[0029] The preheating container 230Y and the recovery container 230X may alternate in their roles. For example, either container 230 may be used for preheating and CO ２ Alternatively, the coil 220 may be moved to a preheated container 230, the preheated honeycomb structure 100 may be set in the coil 220, and the honeycomb structure 100 may be heated in the container 230. In other words, the preheated honeycomb structure 100 may be moved relatively to the coil 220. In this case, CO ２ The suction ports are provided in the collection container 230X and the preheating container 230Y, respectively.

[0030] Opening and closing of an entrance (e.g., a door) of the preheating container 230Y, setting (e.g., carrying) of the honeycomb structure 100 into the preheating container 230Y, temperature and / or pressure (e.g., preheating) in the preheating container 230Y, opening and closing of the partition wall 290, movement of the honeycomb structure 100X from the preheating container 200Y to the recovery container 230X, temperature and / or pressure (e.g., heating and cooling) in the recovery container 230X, opening and closing of an exit (e.g., a door) of the recovery container 230X, and CO 2 from the structure container 200 ２suction, may be controlled manually or by a control device 350 described later. In the latter case, the control device 350 controls, for example, a mechanism (e.g., a motor) for opening and closing the entrance of the preheating container 230Y, a mechanism (e.g., a motor) for setting the honeycomb structure 100 in the preheating container 230Y, a mechanism (e.g., a heat exchanger for heating, a heat pump, and a heat exchanger for cooling) that affects the temperature and / or pressure of the preheating container 230Y and / or the collection container 230X, a mechanism (e.g., a motor) for opening and closing the partition wall 290, a mechanism (e.g., a lift) for moving the honeycomb structure 100 from the preheating container 200Y to the collection container 230X, a mechanism (e.g., a motor) for opening and closing the outlet of the collection container 230X, and a mechanism (e.g., a motor) for removing CO from the structure container 200. ２ At least one of the mechanisms for suction (e.g., a suction blower or a vacuum pump) may be controlled.

[0031] 3 is a schematic diagram of the recovery device 150. Due to space limitations, the preheating container 230Y is not shown in the drawings from FIG. 3 onward. In this configuration, the preheating container 230Y (not shown) is located directly above the recovery container 230X, which is useful from the perspective of effective use of heat.

[0032] The collection device 150 includes an ID reader 380, a temperature sensor group 320, a measurement system 370, a CO ２ It includes a measuring device 330 and a control device 350 .

[0033] The ID reader 380 reads the structure ID of the honeycomb structure 100 set in the collection container 230X. For example, each honeycomb structure 100 has an ID medium 301 having data including the structure ID of the honeycomb structure 100, and the ID reader 380 reads the ID medium 301. The ID medium 301 may be any medium such as a barcode, a two-dimensional code, or an RFID (Radio Frequency Identification) tag. The data held by the ID medium 301 is transmitted from the ID reader 380 to the control device 350 and input thereto.

[0034] The temperature sensor group 320 is one or more temperature sensors. The temperature sensor group 320 includes a non-contact temperature sensor that detects the temperature of the honeycomb structure 100 set in the collection container 230X in a non-contact manner. Data representing the temperature is transmitted from each temperature sensor in the temperature sensor group 320 to the control device 350 and input thereto.

[0035] Measurement system 370 includes one or more measuring instruments that measure the voltage and current of high frequency power supply 310 connected to coil 220, and a measuring instrument that measures the temperature difference (in-out temperature difference, which is the difference between the water temperature before and after cooling) of the cooling water of coil 220. Data representing the voltage, data representing the current, and data representing the in-out temperature difference (or the cooling water temperature before and after cooling) are transmitted from measurement system 370 to control device 350 and input thereto.

[0036] CO ２ The measuring device 330 measures the CO 2 recovered from the recovery container 230X. ２ (see arrow 213) or CO obtained by branching a part of it ２ (see arrow 340) ２ The data representing the concentration of CO ２ The measurement data is transmitted from the measuring device 330 to the control device 350 and input. ２ The measuring instrument 330 measures CO separated from the mixed gas (described later) generated in the collection container 230X. ２ Measure the concentration of.

[0037] The control device 350 may be a computer such as a personal computer. ２ The control device 350 performs a control process related to recovery and an abnormality diagnosis process including a determination of the presence or absence of an abnormality. Specifically, for example, the control device 350 identifies the structure ID from the data held by the ID medium 301. In the control process, the control device 350 uses data representing the temperature of the honeycomb structure 100, data representing the voltage of the coil 220, data representing the current of the coil 220, data representing the cooling water temperature difference, and data representing the CO ２The control device 350 records data representing the concentration, and controls heating and cooling of the honeycomb structure 100 based on the data. In the abnormality diagnosis process, the control device 350 determines the presence or absence of an abnormality based on the data history. The control device 350 may also acquire data representing the outside air environment (for example, at least one of temperature, humidity, and atmospheric pressure), and create or update a schedule for gas recovery from the honeycomb structure 100 in the predetermined area 120 based on the data. In accordance with the schedule, CO is recovered from the honeycomb structure 100 in the predetermined area 120. ２ The source of the data representing the outdoor air environment may be a measuring instrument installed inside or outside the predetermined area 120, or may be a server that provides weather forecast data that includes data representing the outdoor air environment.

[0038] FIG. 4 shows the configuration of the control device 350.

[0039] The control device 350 includes an interface device 401 , an input device 404 , a display device 405 , a storage device 402 , and a processor 403 connected to these devices 401 and 402 .

[0040] The interface device 401 includes the temperature sensor group 320, the measurement system 370, and the CO ２ It communicates with the measuring device 330, the ID reader 380, a source of data representing the outside air environment, and a controlled device, such as the high frequency power supply 310 or a device that controls it, or a device that controls the flow of cooling water for the coil 220.

[0041] The input device 404 and the display device 405 are I / O devices such as man-machine interface devices, and are connected to the interface apparatus 401. The input device 404 may be a keyboard or a pointing device. A touch panel in which the input device 404 and the display device 405 are integrated may also be adopted. Furthermore, instead of the control apparatus 350 being provided with the input device 404 and the display device 405, the interface apparatus 401 may be communicably connected to a remote computer (e.g., a client) having the input device 404 and the display device 405.

[0042] The storage device 402 stores data and computer programs. Examples of data stored in the storage device 402 include history data 450 and structure management data 460. The history data 450 is stored in the CO ２ The structure management data 460 is a history of data collected (input) about the honeycomb structure 100 to be recovered and data obtained based on that data. The structure management data 460 is data for each honeycomb structure 100 arranged in a predetermined area 120, such as the structure ID of the honeycomb structure 100, the date and time when the honeycomb structure 100 was first arranged in the predetermined area 120, and the specifications and features of the honeycomb structure 100.

[0043] The processor 403 executes the programs in the storage device 402 to realize functions such as an input unit 411, an arithmetic unit 412, and an output unit 413. The input unit 411 inputs data through the interface device 401 and stores it in the storage device 402. The arithmetic unit 412 performs processes such as control processing and abnormality diagnosis processing based on the data stored in the storage device 402. The output unit 413 outputs data and control commands based on the results of processing by the arithmetic unit 412 through the interface device 401.

[0044] Fig. 5 shows a first example of gas recovery. Note that the recovery container 230X is not shown. In addition, in the configuration shown in Fig. 5 (and Fig. 6), the preheating container 230Y is not necessary because the energy used for heating is stored in the heat accumulator 550 and reused, as will be described later.

[0045] In the first example of gas recovery, heating is mainly performed by induction heating. The recovery device 150 has a heating heat exchanger 562, a heat pump 514, a heat accumulator 550, and a cooling heat exchanger 560.

[0046] CO ２At the start of recovery, as shown by arrow 512, heat stored in the heat accumulator 550 is transferred to the heat pump 514, and as shown by arrow 561, heat is provided from the heat pump 514 to the heating heat exchanger 562. As shown by arrow 520, the carrier gas heated by the heating heat exchanger 562 is provided into the recovery container 230X. The role of the carrier gas is to separate the desorbed gas from the adsorbent, and the carrier gas carries the gas to be recovered (CO in this embodiment). ２ ) is desirable. For example, in the configuration shown in FIG. ２ When using water vapor as a carrier gas for separation, cooling the water vapor to below the condensation temperature in the cooling heat exchanger 560 (condenser 660 in FIG. 6) turns the water vapor into water. The lower the temperature, the lower the water vapor pressure. Therefore, CO ２ The only part that can be easily separated is the arrow 530, which in this case represents water.

[0047] CO ２ In the recovery, a carrier gas enters from one end face of the honeycomb structure 100, passes through each communication hole of the honeycomb structure 100, and flows out from the other end face, thereby absorbing CO adsorbed in the honeycomb structure 100. ２ As indicated by arrows 540, the desorbed CO flows together with the carrier gas. ２ The carrier gas and water vapor flow to the cooling heat exchanger 560. Cooling is performed by the cooling heat exchanger 560, and as indicated by arrow 511, heat is recovered from the cooling heat exchanger 560 to the heat pump 514, and as indicated by arrow 513, heat is transferred from the heat pump 514 to the heat accumulator 550. The heat is stored in the heat accumulator 550. As indicated by arrow 530, the cooled carrier gas is reused. That is, the carrier gas cooled through the cooling heat exchanger 560 is heated by the heating heat exchanger 562, and the heated carrier gas again enters the circulation holes of the honeycomb structure 100 from one end face of the honeycomb structure 100. Also, as indicated by arrow 213, CO2 released from the honeycomb structure 100 is recycled. ２ Specifically, CO is collected (sucked) from the mixed gas (arrow 540) of the carrier gas and the desorbed gas.２ and carrier gas are separated, and as shown by arrow 213, CO ２ is discharged to the outside of the collection container 230X.

[0048] As indicated by arrow 501, data transmitted from measurement system 370 (data representing the voltage and current of high-frequency power supply 310, and data representing the in-out temperature difference of the cooling water) is input to control device 350. Furthermore, as indicated by arrow 502, first data (data representing the temperature of the carrier gas heated by heating heat exchanger 562) transmitted from a temperature sensor (part of temperature sensor group 320) provided in or near heating heat exchanger 562 is input to control device 350. Furthermore, as indicated by arrow 503, second data (data representing the temperature of cooling heat exchanger 560) transmitted from a temperature sensor (part of temperature sensor group 320) provided in or near cooling heat exchanger 560 is input to control device 350. For at least one of the first and second data input to control device 350, the temperature represented by the data (e.g., a temperature time series) may be displayed on display device 405 of control device 350 by output unit 413. For at least one of the first and second data, the user or the calculation unit 412 may check whether the heating heat exchanger 562 or the cooling heat exchanger 560 is operating normally, based on the temperature represented by the data. When the calculation unit 412 performs this check, the check result (for example, an alert if an abnormality is detected) may be displayed on the display device 405.

[0049] Fig. 6 shows a second example of gas recovery. As in Fig. 5, the recovery container 230X is not shown. The same elements as in Fig. 5 are denoted by the same reference numerals. Regarding the second example, differences from the first example will be mainly described, and descriptions of commonalities with the first example will be omitted or simplified.

[0050] In a second example of gas recovery, induction heating is added to steam heating. The recovery system 150 has a steam generator 662 instead of the heating heat exchanger 562 and a condenser 660 instead of the cooling heat exchanger 560.

[0051] CO ２At the start of collection, heat is provided from heat pump 514 to steam generator 662, as indicated by arrow 561. Hot steam is provided by steam generator 662 into collection vessel 230X, as indicated by arrow 620.

[0052] CO ２ In the recovery, high-temperature steam enters from one end face of the honeycomb structure 100, passes through each of the circulation holes of the honeycomb structure 100, and flows out from the other end face. As a result, the honeycomb structure 100 is heated by steam in addition to induction heating, and the temperature rises uniformly. ２ As shown by arrows 640, the CO ２ The water vapor flows to the condenser 660. The water vapor is cooled and condensed into water by the condenser 660, and as indicated by arrow 511, heat is recovered from the condenser 660 to the heat pump 514. As indicated by arrow 630, the water obtained by the condenser 660 is reused. That is, the water is turned into steam by the steam generator 662, and the steam enters the circulation holes of the honeycomb structure 100 from one end face of the honeycomb structure 100 in the recovery container 230X. Also, as indicated by arrow 213, the CO2 released from the honeycomb structure 100 flows through the steam generator 662. ２ is collected (sucked up).

[0053] As indicated by arrow 602, data A (data representing the temperature of the steam generator 662) transmitted from a temperature sensor (part of the temperature sensor group 320) provided in or near the steam generator 662 is input to the control device 350. Furthermore, as indicated by arrow 603, data B (data representing the temperature of the condenser 660) transmitted from a temperature sensor (part of the temperature sensor group 320) provided in or near the condenser 660 is input to the control device 350. For at least one of the data A and B input to the control device 350, the output unit 413 may display the temperature (e.g., a temperature time series) represented by the data on the display device 405 of the control device 350. For at least one of the data A and B, the user or the calculation unit 412 may check whether the steam generator 662 or the condenser 660 is operating normally, based on the temperature represented by the data. When the calculation unit 412 performs this check, the check result (for example, an alert if an abnormality is found) may be displayed on the display device 405 .

[0054] FIG. 7 shows the CO ２ 7 shows an example of a change in the amount of CO2 emitted and a change in the temperature of the honeycomb structure 100. In FIG. 7, the arrow 711 indicates the change in the amount of CO2 emitted and the temperature of the honeycomb structure 100. ２ The arrow 712 indicates that the left vertical axis should be referred to for temperature.

[0055] CO ２ Emissions (concentration) is CO ２ The concentration is represented by data from the measuring instrument 330. The temperature of the honeycomb structure 100 is represented by data from a non-contact temperature sensor that detects the temperature of the honeycomb structure 100 in a non-contact manner. These data are received by the control device 350, input by the input unit 411, and stored in the memory device 402. In addition, data (data including the structure ID) read from the ID medium 301 of the honeycomb structure 100 set in the collection container 230X is also received by the control device 350, input by the input unit 411, and stored in the memory device 402.

[0056] As indicated by the reference numeral 700, heating of the honeycomb structure 100 set in the recovery container 230X is started. The heating may be the heating exemplified in either of Figs. 5 and 6, or other heating may be used. Furthermore, since the honeycomb structure 100 set in the recovery container 230X has been preheated, the temperature of the honeycomb structure 100 is already at a relatively high temperature (for example, about 30°C). Therefore, as indicated by the reference numeral 701, the time required for the temperature of the honeycomb structure 100 to reach the maximum temperature (for example, 100°C) is shortened.

[0057] As the temperature of the honeycomb structure 100 increases, the CO ２ The concentration increases. ２ According to the configuration shown in FIGS. 5 and 6, the measuring device 330 measures the CO separated from the mixed gas (arrow 540 or 640). ２ Measure the concentration of CO ２ Emissions are calculated by dividing the CO in the mixed gas by the ２ The calculation unit 412 calculates the time integral of the product of the concentration and the flow rate of the mixed gas (see FIG. 8). As indicated by the reference numeral 702, when the temperature of the honeycomb structure 100 rises to a certain temperature (for example, about 70° C.), the CO ２ The control device 350 (e.g., the calculation unit 412) determines this point as the CO ２ At the start of emission, i.e., CO ２ This is considered the start of the collection time. ２ Based on the measurement results by the measuring instrument 330, ２ Recovery amount 903 and CO ２ The recovery time 904 (see FIG. 9) is recorded by the computing unit 412 .

[0058] As the temperature of the honeycomb structure 100 increases, CO ２ Eventually, the temperature of the honeycomb structure 100 reaches the maximum temperature, and the CO ２ The concentration also reaches a maximum concentration (for example, 100%). After that, the temperature of the honeycomb structure 100 gradually decreases, and the CO ２ The concentration also decreases.

[0059] As shown by the reference numerals 703 and 704, CO ２When the concentration has sufficiently decreased (for example, decreased to about 10% of the maximum concentration), the control device 350 (for example, the calculation unit 412) starts cooling the honeycomb structure 100. In addition, the control device 350 (for example, the calculation unit 412) determines this point as the CO ２ The temperature indicated by the reference numeral 703 is the end point of the CO ２ This is the minimum temperature during the collection time.

[0060] As indicated by the reference numeral 705, when the temperature of the honeycomb structure 100 has sufficiently decreased (for example, to the ambient temperature, or until the temperature decrease per unit time is 50% of the temperature change rate immediately after the end of heating (for example, arrow 790)), the control device 350 (for example, the calculation unit 412) finishes cooling the honeycomb structure 100. The temperature indicated by the reference numeral 705 is the temperature of the honeycomb structure 100 when cooling is completed.

[0061] As shown in FIG. 8, the calculation unit 412 calculates ２ CO per unit time during recovery ２ The concentration of CO ２ emissions and convert them into CO ２ By accumulating emissions, CO ２ The recovery amount is calculated. Specifically, for example, the control outlined below is carried out. In the following description, the XXX in "[XXX]" applies to the configuration illustrated in FIG. 2, and the rest applies to the configurations illustrated in any of FIG. 2, FIG. 5 and FIG. 6. (S70) The honeycomb structure 100X is discharged from the recovery container 230X. [The partition wall 290 opens, and the preheated honeycomb structure 100Y moves from the preheating container 230Y to the recovery container 230X.] (S71) The honeycomb structure 100X is set in the recovery container 230X. (S72) The structure ID is read from the ID medium 301 of the honeycomb structure 100X. (S73) Heating is started, and CO ２ Suction is started, and data recording to the history data 450 is started. (S74) Heating is finished. (S75) CO ２ Suction is completed. (S76) The honeycomb structure 100X is discharged from the recovery container 230X. (The partition wall 290 opens, and the preheated honeycomb structure 100Y moves from the preheating container 230Y to the recovery container 230X.)

[0062] FIG. 9 shows an example of the history data 450 .

[0063] The historical data 450 includes CO ２ There is an entry for each collection. ２ Collection date and time 901, structure ID 902, CO ２ Recovery amount 903, CO ２ The data includes a recovery time 904 , a temperature sensor maximum value 905 , a temperature sensor minimum value 906 , and a post-cooling temperature 907 .

[0064] CO ２ The collection date and time 901 is ２ The date and time of the start of the recovery time, specifically, the date and time indicated by the reference numeral 702 in Fig. 7. The structure ID 902 indicates the structure ID of the honeycomb structure 100. ２ The recovered amount 903 is CO ２ CO obtained by integrating emissions ２ Recovery amount (CO ２ CO ２ Recovery time 904 is CO ２ The collection time, specifically, the time from the date and time indicated by the reference numeral 702 to the date and time indicated by the reference numeral 704, is indicated.

[0065] The temperature sensor maximum value 905 is CO ２ The maximum value of the temperatures detected by the non-contact temperature sensor during the collection time, specifically, the maximum temperature indicated by the reference numeral 701, is shown. ２ The temperature 907 after cooling represents the temperature (temperature detected by the non-contact temperature sensor) at the completion of cooling of the honeycomb structure 100, specifically, the temperature represented by the reference symbol 705.

[0066] The calculation unit 412 performs an abnormality diagnosis process based on the history data 450. Specifically, the calculation unit 412 analyzes the history data 450 to determine whether or not an abnormality exists. The calculation unit 412 displays information indicating the determined abnormality and the location where the abnormality is estimated to have occurred on the display device 405. Furthermore, the input unit 411 may receive one or more conditions corresponding to an abnormality from the input device 404, and store data indicating each of the one or more conditions in the storage device 402.

[0067] 9, abnormalities indicated by reference numerals 911 to 915 are exemplified, and these abnormalities are detected by the calculation unit 412. These abnormalities will be explained below. In the following explanation, "honeycomb structure X" means the honeycomb structure 100 whose structure ID 902 is "X".

[0068] According to the reference numeral 911, the calculation unit 412 calculates the CO of the honeycomb structure 002 (an example of the honeycomb structure 100 having the same structure ID). ２ The decrease in the recovery amount 903 is reduced to a level that satisfies a predetermined condition (for example, CO ２ In this case, the calculation unit 412 determines that the honeycomb structure 002 has deteriorated. The cause of this abnormality is that the CO ２ This is presumably because the adsorption capacity is reduced.

[0069] According to the reference numeral 912, the calculation unit 412 calculates the CO of the honeycomb structure 002 (an example of the honeycomb structure 100 having the same structure ID). ２ The increase in the recovery time 904 is large enough to satisfy a predetermined condition (e.g., CO ２ In this case, the calculation unit 412 determines that the honeycomb structure 002 has deteriorated. The cause of this abnormality is that the CO ２ This is presumably due to a decline in the ability to separate.

[0070] According to the reference numeral 913, the calculation unit 412 determines that the temperature sensor maximum value 905 is an abnormal value. In this case, the calculation unit 412 determines that an abnormality exists in a device related to heating (e.g., the coil 220 or a heater (not shown)). This is because it is presumed that the temperature sensor maximum value 905 is an abnormal value due to an abnormality in the device related to heating. Note that an "abnormal value" may be either a value that is too high or a value that is too low. For example, the temperature sensor maximum value 905 may be equal to or greater than a first threshold value (or less than a second threshold value), or the difference between the temperature sensor maximum value 905 and the average value of the temperature sensor maximum values ​​905 may be equal to or greater than a threshold value.

[0071] According to the reference numeral 914, the calculation unit 412 calculates the CO ２ CO with a recovery amount 903 ２ All the data after the collection date and time 901 are low (for example, the data is collected a predetermined number of times or more in succession, ２ In this case, the calculation unit 412 determines whether the honeycomb structure 100, the heating device, or the CO ２ Identify the abnormality in the suction device that sucks CO ２ It is expected that the arithmetic device 412 will be able to distinguish whether the cause of the low CO 2 content (reference numeral 914) is a problem with the honeycomb structure 100 or a problem with the heating device (for example, the heating heat exchanger 562) by performing a process described later with reference to FIG. 12. ２ It can be determined whether the low level is due to a problem with the suction device.

[0072] According to the reference numeral 915, the calculation unit 412 determines that the post-cooling temperature 907 is high (for example, equal to or higher than a threshold value). In this case, the calculation unit 412 determines that there is an abnormality in the device that circulates the cooling water for the coil 220 or the cooling heat exchanger 560 (or the condenser 660). This is because it is presumed that the post-cooling temperature 907 is high due to an abnormality in the equipment related to cooling. Note that when the post-cooling temperature 907 is high, the calculation unit 412 can determine that there is an abnormality in the equipment related to cooling based on the temperature from the water thermometer.

[0073] An example of the processing performed in this embodiment will be described below.

[0074] FIG. 10 shows the flow of the structure gas recovery process.

[0075] The setting of the honeycomb structure 100 in the collection container 230X is completed, the structure ID is read from the ID medium 301 of the honeycomb structure 100, and data including the structure ID is received by the input unit 411 of the control device 350 and stored in the storage device 402 (S1001). ２ The honeycomb structure 100 after recovery may be taken out and the preheated honeycomb structure 100 may be transferred from the preheating container 230Y into the recovery container 230X, or the preheated honeycomb structure 100 may be transferred from the preheating container 230Y into the empty recovery container 230X.

[0076] Heating of the honeycomb structure 100 is started. Heating of the honeycomb structure 100 may be started in response to a command from the control device 350, or may be started manually.

[0077] The input section 411 of the control device 350 is ２ The data received from the measuring device 330 is stored in the storage device 402, and the calculation unit 412 calculates the CO ２ The storage device 402 stores collected or calculated data (for example, temperature data from a non-contact temperature sensor, CO ２ CO from the measuring instrument 330 ２ Concentration data, CO ２ CO calculated based on concentration ２ The time series of data (data representing the amount of waste collected) is stored.

[0078] The calculation unit 412 calculates the CO ２ The concentration is the CO ２ Concentration (CO before one cycle ２ If the determination result of S1003 is false (S1003: NO), the honeycomb structure 100 is not provided with CO to be recovered. ２Since there is still remaining time, the heating of the honeycomb structure 100 is not stopped (for example, cooling is not started), and therefore the process returns to S1002.

[0079] If the determination result in S1003 is true (S1003: YES), the calculation unit 412 calculates the CO ２ The concentration of CO ２ The calculation unit 412 calculates the maximum concentration of the CO ２ The concentration is CO ２ It is determined whether the concentration is 10% or less of the maximum concentration of CO (S1005). ２ If the determination result in S1004 is false (S1005: NO), the honeycomb structure 100 is ２ Since there is still remaining time, the heating of the honeycomb structure 100 is not stopped (for example, cooling is not started), and therefore the process returns to S1002.

[0080] When the determination result of S1005 is true (S1005: YES), the next process is performed (S1006). That is, the heating of the honeycomb structure 100 in the recovery container 230X is stopped, and cooling of the honeycomb structure 100 is started. Both the stopping of heating and the starting of cooling may be performed by the calculation unit 412 or may be performed manually. The heat taken from the honeycomb structure 100 during cooling is transferred to the heat accumulator 500. After the start of heating, the CO ２ Not only the concentration but also the temperature represented by the data from the non-contact temperature sensor is recorded in chronological order in the storage device 402, and the calculation unit 412 creates a record of the time series as one entry in the history data 450. In this process, for example, the calculation unit 412 calculates the CO ２ The recovered amount 903 is CO ２ Emissions (CO ２ CO based on concentration ２ The calculation unit 412 calculates the CO ２ The collection date and time 901 is ２ The date and time when the concentration reaches a predetermined value (for example, 50% as illustrated in FIG. 7) may be recorded. ２The recovery time 904 is ２ This may be recorded as the time from the collection date and time 901 to the start of cooling.

[0081] Next, an abnormality diagnosis process is performed. In this manner, the abnormality diagnosis process is performed to check the CO ２ This is carried out for the honeycomb structure 100 every time recovery is carried out.

[0082] 11 and 12 show the flow of the abnormality diagnosis process.

[0083] As shown in FIG. 11, the calculation unit 412 calculates the CO ２ For comparison with the recovery amount 903, the CO ２ Refer to the recovery amount 903. ２ The recovery amount of 903 is the CO ２ If the collected amount is smaller than any of the collected amounts 903 (S1102: YES, S1103: YES, and S1104: YES), the calculation unit 412 issues an alert that the sealing state of the collection device 150 is abnormal (S1105). The alert may be displayed on the display device 405, or an LED or the like provided on the collection container 230X or elsewhere may be lit. ２ At least one of the recovered amounts 903 ２ If the collected amount 903 is large (S1102: NO, S1103: NO, or S1104: NO), the process proceeds to S1201.

[0084] As shown in FIG. 12, the calculation unit 412 refers to the history data 450 using the structure ID read in S1101 as a key (S1201).

[0085] The calculation unit 412 calculates the current CO ２ The recovered amount 903 is the CO ２ It is determined whether the amount has decreased by P% or more (0<P<100) compared to the collected amount 903 (S1202). If the determination result of S1202 is true (S1202: YES), the calculation unit 412 calculates the current CO ２ The recovered amount 903 is the first (oldest) CO ２It is determined whether the amount has decreased by Q% or more (P<Q<100) compared to the recovery amount 903 (S1203). If the determination result of S1203 is true (S1203: YES), the calculation unit 412 issues an alert indicating deterioration or replacement of the honeycomb structure 100 to be diagnosed (S1211). The alert may be displayed on the display device 405, or an LED or the like provided in the recovery container 230X or elsewhere may be illuminated. Comparison with the initial data contributes to improving the accuracy of deterioration determination. Furthermore, comparison with the immediately preceding data contributes to detecting the presence or absence of any physical or chemical abnormality (for example, exposure to gases or liquids that deteriorate adsorption).

[0086] If the determination result of S1202 or S1203 is false (S1202: NO or S1203: NO), the calculation unit 412 calculates the current CO ２ The recovery time 904 is the CO ２ It is determined whether the increase is R % or more (0<R<100) compared to the recovery time 904 (S1204). If the determination result of S1204 is true (S1204: YES), the calculation unit 412 calculates the current CO ２ The recovery time 904 is the first CO ２ It is determined whether the time has increased by S % or more (R<S<100) compared to the recovery time 904 (S1205). If the determination result of S1205 is true (S1203: YES), the calculation unit 412 performs S1211.

[0087] If the determination result of S1204 or S1205 is false (S1204: NO or S1205: NO), the calculation unit 412 determines whether the temperature sensor maximum value 905 for the structure ID is within the set range (S1206). If the determination result of S1206 is false (S1206: NO), that is, if the temperature sensor maximum value 905 is lower or higher than the set range, the calculation unit 412 issues an alert of an abnormality in the heating device (equipment related to heating) (S1212). The alert may be displayed on the display device 405, or an LED or the like provided on the heating device or elsewhere may be illuminated. Note that the "set range" may be one of the conditions specified via the input device 404, or may be a range determined from statistics of the temperature sensor maximum value 905.

[0088] If the determination result in S1206 is true (S1206: YES), the calculation unit 412 determines that the system is normal, that is, that there is no abnormality (S1213). This determination result may be displayed on the display device 405.

[0089] The above is an example of the abnormality diagnosis process.

[0090] 11 and 12, it is possible to determine whether the post-cooling temperature 907 is within a set range, and if the result of the determination is true, to issue an alert of an abnormality in the cooling device (for example, the cooling heat exchanger 560) by the calculation unit 412. It is also possible to determine whether the temperature sensor minimum value 906 is within a set range, and if the result of the determination is true, to execute S1212. ２ Before determining the amount of recovered CO ２ A determination as to the collection time may be made (S1204 and S1205).

[0091] In addition, the determinations in S1102, S1103, and S1104 are based on the most recent CO ２ The judgment may be based on the time series of the collected amount, which makes it easy to make a comparison since the deterioration of the honeycomb structure 100 progresses in a time series.

[0092] In addition, the determinations in S1102, S1103, and S1104 are based on the most recent past CO regardless of whether the structure ID is the same or not. ２ Judgment may also be based on the time series of collected amounts, which is expected to shorten the time until an abnormality is detected.

[0093] Although one embodiment has been described above, this is merely an example for explaining the present invention, and the scope of the present invention is not limited to this embodiment. The present invention can be implemented in various other forms.

[0094] The above description can be summarized as follows: The following summary may include supplementary explanations and explanations of variations of the above description.

[0095] are arranged in a predetermined area 120, and each２ A common recovery device 150 is provided for a plurality of honeycomb structures 100 that adsorb CO (an example of a gas). By repeating the following steps (a) to (e), the CO adsorbed in the plurality of honeycomb structures 100 arranged in a predetermined area 120 is recovered. ２ (a) A honeycomb structure 100 is selected from a plurality of honeycomb structures 100. (b) The selected honeycomb structure 100 is transported. (c) The transported honeycomb structure 100 is set in a collection container 230X, which is an airtight container. (d) The CO adsorbed by the honeycomb structure 100 set in the collection container 230X is removed. ２ is separated by the recovery device 150 having the recovery container 230X, and the separated CO ２ is recovered by the recovery device 150, and CO ２ The honeycomb structure 100 that has been collected is taken out from the collection container 230 X. (e) The taken-out honeycomb structure 100 is returned to the predetermined area 120 .

[0096] As a result, CO 2 is collected from all the honeycomb structures 100 by the recovery device 150 having fewer recovery containers 230X than the honeycomb structures 100. ２ Since the honeycomb structure 100 can be recovered, it is possible to suppress an increase in the system scale and maintenance burden. Note that (e) is not necessarily required. In other words, the honeycomb structure 100 that has been removed does not have to be returned to a vacant position in the predetermined area 120 due to the honeycomb structure 100 being transported from the predetermined area 120. For example, a new honeycomb structure 100 may be placed in the vacant position. However, as described above, by transporting and returning the honeycomb structure 100 (transport for returning), it is possible to reduce CO2 emissions with a predetermined number of honeycomb structures 100. ２ It is possible to achieve adsorption and recovery of

[0097] The honeycomb structure 100 is ２In the above embodiment, the honeycomb structure 100 is a pillar-shaped honeycomb structure made of ceramics. The honeycomb structure 100 has a certain degree of strength, so it can support and transport the honeycomb structure 100, which is expected to facilitate transportation of the honeycomb structure 100. In order to make the adsorption / desorption capabilities of all the honeycomb structures 100 uniform and to facilitate management, it is preferable that the shape, size (e.g., width, depth, and height), material, etc. of all the honeycomb structures 100 are the same.

[0098] In order to optimize the balance between adsorption and recovery, it is preferable that N / X≦T1 / T2. N is the number of honeycomb structures 100 in a predetermined area 120. X is the number of recovery containers 230X. T1 is the CO ２ Specifically, for example, the time required for the honeycomb structure 100 to completely absorb CO ２ State A (e.g., CO ２ is sufficiently removed and no further CO ２ (a state in which the withdrawal of CO is not considered to have occurred) ２ At state B (where CO is considered to be adsorbed), ２ T2 is the time until the CO2 from the honeycomb structure 100 is absorbed. ２ Specifically, for example, it is the time required for the honeycomb structure 100 to change from state B to state A. By adjusting the value of N and / or the value of X so that the relationship N / X≦T1 / T2 is established, efficient CO recovery can be achieved taking T1 and T2 into consideration. ２ For example, when T1 is significantly larger than T2, the value of N may be increased (the number of honeycomb structures 100 may be increased) or the value of X may be decreased (the number of collection containers 230X may be reduced).

[0099] The control device 350 may be provided as an example of a computer. ２Every time the honeycomb structure 100 is recovered, the structure ID read from the honeycomb structure 100, the CO ２ Data representing at least one of the recovery date and time 901, the gas recovery amount 903 of the honeycomb structure 100, the gas recovery time 904 of the honeycomb structure 100, and the temperature of the honeycomb structure 100 may be stored in the storage device 402. The control device 350 may determine whether the honeycomb structure 100 is degraded or the recovery device 150 is malfunctioning based on the history data 450, which is data including a collection of the accumulated data. For example, the control device 350 may determine that the honeycomb structure 100 is degraded when the gas recovery amount 903 of the honeycomb structure 100 with the same structure ID is decreasing. Furthermore, for example, the control device 350 may determine that the recovery device 150 is malfunctioning when all of the gas recovery amounts 903 after a certain date and time are lower than a threshold value. In this way, appropriate maintenance is possible. For example, the degree of deterioration of the honeycomb structure 100 can be estimated by easily comparing the differences between honeycomb structures 100. Furthermore, the control device 350 can display the judgment result (for example, the result of the abnormality diagnosis process described above) on the display device 405 or transmit it to a remote information processing terminal (for example, an information processing terminal of a maintenance worker or a manager), thereby making it possible to notify the honeycomb structures 100 that are predicted to need replacement within a certain period of time, to issue replacement instructions for honeycomb structures 100 that need replacement, and to notify the locations of the recovery devices 150 where abnormalities are suspected. The control device 350 may be common to all the honeycomb structures 100 and all the recovery containers 230X. For example, when there are multiple recovery devices 150, the control device 350 may be located inside any of the recovery devices 150 or outside all of the recovery devices 150.

[0100] For example, the structure management data 460 may have position data of the honeycomb structure 100 (e.g., coordinate data in a predetermined area 120) for each structure ID of the honeycomb structure 100. In order to transport the selected honeycomb structure 100, the control device 350 may transmit a transport instruction associated with the position data linked to the structure ID of the honeycomb structure 100 to a transport device that transports the honeycomb structure 100. In response to the transport instruction, the transport device may pick up the honeycomb structure 100 from the position represented by the position data associated with the transport instruction and transport it to the recovery device 150. The transported honeycomb structure 100 may be set in a container 230 (e.g., a preheating container 230Y or a recovery container 230X) manually or by a robot or the like. ２ The honeycomb structure 100 may be returned by the transport device to a predetermined area 120 where the honeycomb structure 100 has been collected. The return position may be the same as or different from the original position. The transport device may be a transport belt that transports the placed honeycomb structure 100 and a device that drives the belt, or may be an unmanned aerial vehicle. For example, in (a), the control device 350 may select a honeycomb structure 100 from a plurality of honeycomb structures 100 and send a transport instruction for the structure ID of the selected honeycomb structure 100 to the transport device. The transport device has management data including data indicating the position in the predetermined area where the honeycomb structure 100 having the structure ID is located. In (b), in response to the transport instruction from the control device 350, the transport device may identify the position of the structure ID specified in the transport instruction from the management data, and transport the honeycomb structure 100 at the identified position to a predetermined position (for example, a position where a collection container is located or a standby position adjacent to that position).

[0101] The selection of the honeycomb structure 100 may be performed by the control device 350. For example, the latest CO ２ The honeycomb structure 100 may be selected after the time T1 (time required for adsorption) has elapsed since the collection date and time 901. ２ To facilitate adsorption, air may be blown into the honeycomb structure 100 using an electric blower or by other methods.

[0102] Honeycomb CO ２ The amount of adsorption of CO ２ The control device 350 may create or update a schedule for gas recovery from the honeycomb structure 100 based on the data of the outside air environment. Steps (a) to (e) may be repeated according to the schedule. The data of the outside air environment is used to estimate the CO 2 in the environment. ２ The control device 350 calculates the CO concentration, humidity, temperature, and wind speed represented by the data of the outdoor air environment. ２ From the time series of the concentration, humidity, temperature and wind speed, the CO ２ The adsorption rate is estimated and the estimated CO ２ The adsorption rate and the predetermined time T1 (CO ２ The schedule for gas collection for the honeycomb structure 100 may be adjusted (for example, the time for starting gas collection for each honeycomb structure 100 may be advanced or delayed) based on the time required for gas collection (the time required for gas adsorption).

[0103] At least a part of the sensible heat generated in cooling the honeycomb structure 100 heated for gas desorption in the recovery device 150 may be utilized to heat the honeycomb structure 100 set next in the recovery container 230X and / or to preheat the honeycomb structure 100 set next in the recovery container 230X (for example, set in the preheating container 230Y). ２ The recovery container 230X may be an example of a compartment where a gas desorption operation is performed, and the preheating container 230Y may be an example of a compartment where a desorption operation is awaited.

[0104] Furthermore, the recovery container 230X may be a container as a compartment separated by an openable and closable partition wall 290 provided in the structure container 200 (an example of a predetermined container). In addition to the recovery container 230X, a preheating container 230Y may be provided as a compartment separated by the partition wall 290. A gas outlet may be provided in the recovery container 230X. The above-mentioned (c) may include the following: (c1) Setting the transported honeycomb structure 100 in the preheating container 230Y. (c2) Preheating the honeycomb structure 100 set in the preheating container 230Y. (c3) Opening the partition wall 290, setting the honeycomb structure 100 from the preheating container 230Y in the recovery container 230X, and removing the CO2 released into the preheating container 230Y by preheating. ２ is collected from the preheating vessel 230Y through the open partition wall 290 and the gas outlet of the collection vessel 230X.

[0105] Furthermore, induction heating can be used to heat the honeycomb structure 100. As an example of the honeycomb structure 100 for which induction heating is used, a honeycomb structure 100 that has been subjected to at least one of the treatments illustrated in Figs. 13 to 15 may be employed.

[0106] 13, a magnetic or dielectric material 1300 is embedded in some of the cells divided by the partition walls of the honeycomb structure 100. This is expected to cause local heating and heat the entire honeycomb structure 100 through thermal conduction.

[0107] According to the example shown in Fig. 14, a magnetic material or a dielectric material is mixed into the base material of the honeycomb structure 100. In the example shown in Fig. 14, dots on the partition walls etc. are made of a magnetic material or a dielectric material.

[0108] 15, the inner walls of the cells (through holes) are coated with a magnetic or dielectric material 1500. This is expected to allow the honeycomb structure 100 to be heated uniformly.

[0109] 100...honeycomb structure, 150...recovery device

Claims

1. A gas recovery method comprising: recovering gas adsorbed to a plurality of adsorptive structures arranged in a predetermined area by repeating the following steps (a) to (e): (a) selecting an adsorptive structure from the plurality of adsorptive structures; (b) transporting the selected adsorptive structure; (c) setting the transported adsorptive structure in a collection container which is a sealed container; (d) desorbing the gas adsorbed to the adsorptive structure set in the collection container using a collection device having the collection container, recovering the desorbed gas using the collection device, and removing the adsorptive structure from the collection container after gas recovery; and (e) returning the removed adsorptive structure to the predetermined area.

2. The gas recovery method according to claim 1, wherein each of the plurality of adsorptive structures is a pillar-shaped honeycomb structure made of ceramics.

3. The gas recovery method according to claim 1, wherein N / X≦T1 / T2, N is the number of adsorption structures in the given area, X is the number of recovery vessels, T1 is the time required for gas adsorption into the adsorption structures, and T2 is the time required for gas recovery from the adsorption structures.

4. A gas recovery method according to claim 1, wherein, each time gas is recovered from an adsorptive structure, data representing at least one of the structure ID read from the adsorptive structure, the date and time of gas recovery by the adsorptive structure, the amount of gas recovered by the adsorptive structure, the time required for gas recovery by the adsorptive structure, and the temperature of the adsorptive structure is accumulated by a computer, and the computer determines whether the adsorptive structure has deteriorated or the recovery device has an abnormality from history data which is data including a collection of the accumulated data.

5. The gas recovery method according to claim 4, wherein the history data represents the structure ID read from the adsorptive structure, the date and time of gas recovery by the adsorptive structure, and the amount of gas recovered by the adsorptive structure; and the computer determines that the adsorptive structure has deteriorated if the amount of gas recovered by an adsorptive structure with the same structure ID has decreased; and determines that the recovery device has an abnormality if all gas recovery amounts from a certain date and time are lower than a threshold value.

6. The gas recovery method according to claim 1, wherein the computer creates or updates a schedule for gas recovery from the adsorptive structure based on ambient air environmental data including data representing the gas concentration, humidity, temperature, and wind speed in the environment, and repeats steps (a) to (e) in accordance with the schedule.

7. A gas recovery method as described in claim 1, wherein at least a portion of the sensible heat generated in cooling the adsorption structure heated for gas desorption in the recovery container is utilized to heat the next adsorption structure set in the recovery container and / or to preheat the next adsorption structure set in the recovery container.

8. The gas recovery method according to claim 1, wherein the recovery container is a container as a compartment separated by an openable partition provided in a specified container, the specified container has a preheating container as a compartment separated by the partition in addition to the recovery container, a gas outlet is provided in the recovery container, and the method comprises, in (c), (c1) setting the transported adsorption structure in the preheating container, (c2) preheating the adsorption structure set in the preheating container, and (c3) opening the partition to set the adsorption structure from the preheating container in the recovery container, and recovering gas desorbed into the preheating container by the preheating from the preheating container through the open partition and the gas outlet of the recovery container.

9. A gas recovery method according to claim 1, wherein each adsorption structure is arranged in a predetermined area so as to be transported from said predetermined area by a transport device, and the maximum number of adsorption structures that can be arranged depends on the size of said predetermined area and is not restricted by the design of the device.

10. A gas recovery system comprising a recovery device common to a plurality of adsorption structures arranged in a predetermined area, each of which adsorbs gas, said recovery device comprising a recovery container which is a sealed container, and recovering gas adsorbed by said plurality of adsorption structures by repeating the following steps (a) to (e): (a) an adsorption structure is selected from said plurality of adsorption structures; (b) the selected adsorption structure is transported; (c) the transported adsorption structure is set in said recovery container; (d) the gas adsorbed by the adsorption structure set in said recovery container is desorbed by said recovery device having said recovery container, the desorbed gas is recovered by said recovery device, and the adsorption structure after gas recovery is removed from said recovery container; and (e) the removed adsorption structure is returned to said predetermined area.

11. A computer program causing a computer in a gas recovery system as defined in claim 10 to execute the following steps: each time gas is recovered from an adsorptive structure, accumulate in a storage device detection data representing at least one of the following: the ID read from the adsorptive structure, the date and time of gas recovery by the adsorptive structure, the amount of gas recovered by the adsorptive structure, the time required for gas recovery by the adsorptive structure, and the temperature of the recovery device in which the adsorptive structure is set; and determine whether the adsorptive structure has deteriorated or the recovery device has an abnormality from history data which is data including a collection of the accumulated detection data.

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