Carbon dioxide management system and carbon dioxide management method

Abstract

To provide a carbon dioxide management system and a carbon dioxide management method that efficiently recover carbon dioxide emitted from a construction site.SOLUTION: A carbon dioxide management system includes: a recovery pipe 105 and a recovery line 101; a separation device 112 in a construction site; and a CO2 storage device 113 in a construction site. The recovery pipe 105 and the recovery line 101 transport an exhaust gas emitted from a construction machine M1 that is used in a construction site. The separation device 112 separates carbon dioxide from the exhaust gas transported to the recovery pipe 105 and the recovery line 101. The CO2 storage device 113 stores the carbon dioxide separated by the separation device 112 at the construction site so that the carbon dioxide can be used.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a carbon dioxide management system and a carbon dioxide management method for assisting in the recovery of carbon dioxide emitted at a construction site.

Background Art

[0002] In order to suppress global warming and climate change, reduction of carbon dioxide (CO2) emissions is also required in construction work. Therefore, technologies for calculating this carbon dioxide emission amount have been studied (see Patent Document 1). In the technology described in this document, the CO2 emission amount per unit of each major material is multiplied by the quantity of the major material to calculate the CO2 emission amount of each major material. Also, the CO2 emission amount per unit of fuel is multiplied by the fuel consumption amount consumed by each major construction machine to calculate the CO2 emission amount of each major construction machine.

[0003] On the other hand, a carbon dioxide recovery system for recovering carbon dioxide contained in the exhaust gas of an engine has also been studied (see Patent Document 2). The carbon dioxide recovery system described in this document includes an absorption unit, an exhaust gas supply path, and a pressure boosting device. Then, CO2 is separated and recovered from the exhaust gas of the engine.

[0004] Also, a carbon dioxide immobilization technology for immobilizing CO2 in cement hydrate has been studied (see Patent Document 3). In the technology described in this document, cement hydrate and water are placed in a container. Then, while stirring the mixed liquid of cement hydrate and water, carbon dioxide is blown into the container.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] However, at a construction site, it is difficult to recover carbon dioxide emitted from construction machinery and the like. For this reason, efficient utilization of carbon dioxide has been difficult.

MEANS FOR SOLVING THE PROBLEMS

[0007] A carbon dioxide management system for solving the above problems includes a transport facility that transports exhaust gas emitted from construction machinery used at a construction site within the construction site, a separation facility within the construction site that separates carbon dioxide from the exhaust gas transported by the transport facility, and a storage facility within the construction site that stores the carbon dioxide separated by the separation facility so that it can be utilized.

EFFECTS OF THE INVENTION

[0008] The present disclosure can efficiently recover carbon dioxide emitted at a construction site.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

MODE FOR CARRYING OUT THE INVENTION

[0010] Hereinafter, an embodiment of a carbon dioxide management system and a carbon dioxide management method will be described with reference to FIGS. 1 to 6. In this embodiment, it will be described as a carbon dioxide management system and a carbon dioxide management method used when recovering carbon dioxide emitted from construction machinery at a construction site such as a building. Thereby, carbon dioxide emitted from the construction machinery into the atmosphere is reduced.

[0011] As shown in FIG. 1, the carbon dioxide management system A1 of this embodiment recovers carbon dioxide contained in the exhaust gas emitted from the construction machinery M1 used at the construction site 100. As the construction machinery M1, for example, a backhoe (hydraulic excavator) can be used. For this purpose, a recovery line 101 is provided on the exterior structure around the construction site 100. Further, the exhaust gas emitted from the construction machinery M1 is recovered by a recovery pipe 105. For this purpose, connection ports of the recovery pipe 105 are provided at predetermined intervals on the recovery line 101. Here, the recovery line 101 and the recovery pipe 105 function as transportation facilities. Then, in the recovery device 10 provided at the construction site 100, carbon dioxide contained in the exhaust gas is separated from the exhaust gas. This recovery device 10 is connected to the support server 20 and the management device 30 via a network.

[0012] (Description of Hardware Configuration) The hardware configuration of the information processing device H10 that realizes the recovery device 10, the support server 20, and the management device 30 will be described with reference to FIG. 2. The information processing device H10 includes a communication device H11, an input device H12, a display device H13, a storage device H14, and a processor H15. Note that this hardware configuration is an example, and it is also possible to be realized by other hardware.

[0013] The communication device H11 is an interface that establishes a communication path with other devices and executes data transmission and reception, and is, for example, a network interface or a wireless interface.

[0014] The input device H12 is a device that accepts the input of various information, such as a mouse, a keyboard, etc. The display device H13 is a display or the like that displays various information. Note that a touch panel display may be used as the input device H12 and the display device H13.

[0015] The storage device H14 is a storage device that stores data and various programs for executing the various functions of the collection device 10, the support server 20, and the management device 30. Examples of the storage device H14 include a read-only memory (ROM), a random access memory (RAM), a hard disk, etc.

[0016] The processor H15 controls each process in the collection device 10, the support server 20, and the management device 30 using the programs and data stored in the storage device H14. Examples of the processor H15 include, for example, a central processing unit (CPU), a microprocessor unit (MPU), etc. This processor H15 expands the program stored in the ROM or the like into the RAM and executes various processes for each process.

[0017] The processor H15 is not limited to performing software processing for all the processes it executes. For example, the processor H15 may include a dedicated hardware circuit (for example, an application-specific integrated circuit: ASIC) that performs hardware processing for at least a part of the processes it executes. That is, the processor H15 may be configured as follows.

[0018] (1) One or more processors that operate according to a computer program (software) (2) One or more dedicated hardware circuits that execute at least a part of the various processes (3) A combination thereof, including circuitry The processor includes a CPU and memories such as RAM and ROM, and the memories store program codes or instructions configured to cause the CPU to execute processes. The memory, i.e., the computer-readable medium, includes any available medium accessible by a general-purpose or special-purpose computer.

[0019] (System Configuration) Next, each function of the carbon dioxide management system A1 will be described. As shown in FIG. 3, a recovery pipe 105 is connected to an exhaust pipe M12 (tail pipe) of an engine M11 of a construction machine M1 via a detachable attachment 121. A blower 122, a flow meter 123, and a check valve 124 are provided in this recovery pipe 105. The blower 122 sends out the exhaust gas from the engine M11 to the recovery pipe 105. The flow meter 123 measures the flow rate of the exhaust gas. The check valve 124 suppresses the backflow of the exhaust gas.

[0020] Since the recovery pipe 105 is connected to the construction machine M1, a relatively flexible and stretchable member (for example, a flexible hose, etc.) is used. This recovery pipe 105 is connected to the recovery device 10 via a recovery line 101 and supplies the exhaust gas to the recovery device 10. As the recovery line 101, a member with relatively high rigidity (such as a metal pipe or a vinyl chloride pipe, etc.) is used.

[0021] The recovery device 10 includes an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. The exhaust gas storage device 111 is a storage facility (for example, a container such as a cylinder or a tank) that stores the exhaust gas recovered via the recovery line 101. A measuring instrument D11 is provided in this exhaust gas storage device 111. This measuring instrument D11 measures the volume of the exhaust gas before separation and the concentration of carbon dioxide in the exhaust gas.

[0022] The separation device 112 is a separation facility that separates carbon dioxide from the exhaust gas. Here, the membrane separation method is used as the method for separating carbon dioxide. The membrane separation method is a method of separating carbon dioxide and other gases by utilizing the difference in their membrane permeability. As the membrane, a polyamide membrane, a polysulfone membrane, a polytetrafluoroethylene membrane, etc. are used. Here, the separation rate varies depending on the type of membrane, and the higher the permeability of the carbon dioxide membrane, the faster the separation rate. Also, substances with a small molecular size or high polarity tend to easily pass through the membrane. And the cost also varies depending on the type of membrane. Also, by repeating the membrane separation process, the efficiency deteriorates, but the concentration can be increased.

[0023] The CO2 storage device 113 is a storage facility (for example, a container such as a cylinder or a tank) that stores the separated carbon dioxide. A measuring instrument D12 is provided in this CO2 storage device 113. This measuring instrument D12 measures the volume and concentration of carbon dioxide in the exhaust gas after separation.

[0024] And the carbon dioxide stored in the CO2 storage device 113 is utilized in the processing facility device 150. As the processing facility device 150, for example, a device that mixes carbon dioxide into concrete is used.

[0025] As shown in FIG. 4, the support server 20 is a computer system that executes support processing for the utilization of the recovered carbon dioxide. This support server 20 includes a control unit 21, a construction information storage unit 22, a work plan storage unit 23, and a recovery information storage unit 24.

[0026] The control unit 21 performs processes (processes including an acquisition stage, an analysis stage, an instruction stage, etc.) described later. By executing a processing program for this purpose, the control unit 21 functions as an acquisition unit 211, an analysis unit 212, an instruction unit 213, etc.

[0027] The acquisition unit 211 acquires various information from the flow meter 123 and the recovery device 10. The acquisition unit 211 periodically acquires measurement values from the flow meter 123 and the measuring instruments D11 and D12 and records them in the recovery information storage unit 24.

[0028] The analysis unit 212 determines the installation position of the recovery pipe 105 according to the work plan. Furthermore, the analysis unit 212 determines the separation method based on the construction content (purpose of using CO2) using carbon dioxide. This analysis unit 212 holds CO2 condition information for determining the required concentration grade of carbon dioxide and the required amount of carbon dioxide according to the unit amount of the work content according to the specified construction content. The instruction unit 213 instructs the management device 30 about the determined installation position and separation method.

[0029] The construction information storage unit 22 records construction management information about the structures constructed at the construction site. This construction management information is created using BIM (Building Information Modeling). The construction management information includes three-dimensional model information (element model, arrangement information, attribute information) for the project information.

[0030] The project information includes information about the project ID, the name of the work site, the location (longitude and latitude) of the work site, etc. The element model is information about the three-dimensional shape (three-dimensional model) of each element constituting the work site. In this embodiment, element objects related to the capital equipment and work areas used in construction are used.

[0031] The arrangement information includes information about the arrangement of the three-dimensional model (coordinates in the three-dimensional virtual space). The attribute information includes the object ID of this element model. The object ID is information about the identifier for specifying the three-dimensional shape (three-dimensional model) of each element. The building element object further records property information about the specifications (type, standard, dimensions, area, volume, material, price, etc.) of the capital equipment, the process, and the construction period.

[0032] The work plan storage unit 23 records work plan information for construction work. This work plan information is recorded when a work plan for performing construction management across the entire site is formulated. The work plan information includes information on work summaries, process schedules, site organizations, safety measures, quality control, environmental measures, and construction machinery.

[0033] The work summary information includes information on the project name, construction period, work content, construction location, construction cost, etc. The process schedule information includes information on the construction sequence and construction period of each trade. From this process schedule information, construction operations that utilize CO2 can be identified.

[0034] The site organization information includes information on the project responsible person, site supervisor, layout diagrams of workers, etc. The safety measure information includes information on work hazards and countermeasures, the content of safety education implementation, etc.

[0035] The quality control information includes information on inspection items and inspection methods, etc. The environmental measure information includes information on environmental impact countermeasures such as noise and vibration. The construction machinery information includes information on the specifications of construction machinery, driver qualifications, layout diagrams, etc.

[0036] The specification information is information regarding the type and performance of construction machinery. Based on this specification information, exhaust gas and the emission amount per unit time can be identified. The driver qualification information is information regarding the qualifications required to operate construction machinery. The layout diagram information is information indicating the location where construction machinery is arranged at the construction site. This layout diagram information is determined according to the elements of the construction target recorded in the construction information storage unit 22.

[0037] The recovery information storage unit 24 records the recovery management information about the carbon dioxide recovered at the construction site. This recovery management information is recorded when measured periodically during the recovery of the exhaust gas containing carbon dioxide. The recovery management information includes information about the recovery date and time, flow rate, concentration before separation, and concentration after separation. The recovery date and time information is the year, month, day, and time when the exhaust gas was recovered. The flow rate information is the flow rate of the recovered exhaust gas. By multiplying this flow rate by the measurement time, the recovery amount can be calculated. The concentration information before separation is the concentration and volume of carbon dioxide in the air (in the exhaust gas) measured by the measuring instrument D11 of the recovery device 10 before separating carbon dioxide from the exhaust gas. The concentration information after separation is the concentration and volume of carbon dioxide in the air measured by the measuring instrument D12 of the recovery device 10 after separating carbon dioxide from the exhaust gas.

[0038] The management device 30 is a computer terminal used by the person in charge of managing the construction site.

[0039] 〔Carbon dioxide management process〕 The carbon dioxide management process will be described with reference to FIGS. 5 and 6.

[0040] (Arrangement process) The arrangement process will be described with reference to FIG. 5. First, the recovery line is arranged in the outer groove (step S11). Here, the recovery line 101 is provided around the outer structure of the construction site 100 so as to go around the construction site 100.

[0041] Next, the control unit 21 of the support server 20 acquires the planned construction (step S12). Specifically, the acquisition unit 211 of the control unit 21 acquires the construction management information including the construction period from the construction information storage unit 22 for a predetermined planning period. Next, the acquisition unit 211 uses the construction management information to identify the location and content of the construction within the construction site 100.

[0042] Next, the control unit 21 of the support server 20 identifies the work content of the construction machine (step S13). Specifically, the acquisition unit 211 of the control unit 21 acquires work plan document information for the planned period from the work plan storage unit 23. Then, the acquisition unit 211 identifies the construction machines used during the planned period using the work plan document information. Further, the acquisition unit 211 acquires the specification information (displacement) of the construction machines used during the planned period.

[0043] Next, the control unit 21 of the support server 20 identifies the arrangement and operation range of the construction machine according to the work content (step S14). Specifically, the analysis unit 212 of the control unit 21 identifies the installation location and movement range for each construction machine based on the construction location and construction content in the construction management information. For example, according to the work area and location of the construction target, the places where the construction machines can be arranged for work are identified.

[0044] Next, the control unit 21 of the support server 20 sets the specifications of the recovery pipe according to the work content (step S15). Specifically, the analysis unit 212 of the control unit 21 predicts the operating time of the construction machine in the work plan document information according to the construction content in the construction management information for each construction machine. For example, the required operating time is calculated by dividing the work target amount by the specifications (performance) of the construction machine. Next, the analysis unit 212 calculates the exhaust gas emission amount from the displacement and operating time of the construction machine. Then, the analysis unit 212 determines the specifications (arrangement, size, etc.) of the recovery pipe 105 from the emission amount and the operation range of the construction machine M1 to the recovery line 101. In this case, an arrangement that does not overlap with the flow lines of other construction machines M1 is used. Further, the analysis unit 212 determines the size (pipe diameter) of the recovery pipe 105 according to the transport distance calculated from the arrangement. Here, the larger the emission amount and the longer the transport distance, the larger the size of the recovery pipe 105. Note that the size is not limited as long as the recovery pipe 105 does not interfere with the work.

[0045] Next, the instruction unit 213 of the control unit 21 of the support server 20 gives an instruction on the arrangement of the recovery pipe up to the recovery line (step S16). Here, an arrangement instruction for the recovery pipe 105 is output to the management device 30 for each construction machine. This arrangement instruction includes information regarding the connection destination construction machine and size of the recovery pipe 105. Next, connect the recovery pipe. Specifically, the person in charge using the management device 30 connects the recovery pipe 105 of the instructed size from the connection destination construction machine M1 to the recovery line 101 (step S17). In this case, connect it at a short distance within the possible range without causing obstacles to the work.

[0046] (Utilization of carbon dioxide) Next, the utilization of carbon dioxide will be described with reference to FIG. 6.

[0047] First, recover CO2 (step S21). Here, the exhaust gas discharged from the construction machine M1 is transported to the recovery device 10 via the recovery pipe 105 and the recovery line 101 and stored in the exhaust gas storage device 111.

[0048] Next, when it is determined that the construction work for the day has ended, the control unit 21 of the support server 20 acquires the storage information of the exhaust gas (step S22). Specifically, the acquisition unit 211 of the control unit 21 determines the end of the construction work for the day using the work plan information recorded in the work plan storage unit 23. And when it is determined that the construction work has ended, the acquisition unit 211 acquires information regarding the capacity and carbon dioxide concentration of the exhaust gas stored in the exhaust gas storage device 111 from the measuring instrument D11 of the recovery device 10. In this case, according to the measured values of the flowmeter 123 and the measuring instruments D11 and D12, the acquired information is recorded in the recovery information storage unit 24 as recovery management information. The recovery amount of carbon dioxide can be calculated from this recovery management information.

[0049] Next, the control unit 21 of the support server 20 acquires the start time of CO2 utilization (step S23). Specifically, the acquisition unit 211 of the control unit 21 specifies the work content and time zone for starting the construction work that utilizes CO2 from the work plan storage unit 23. For example, when mixing carbon dioxide into concrete, the placement start time of the concrete mixed with carbon dioxide is specified.

[0050] Next, the control unit 21 of the support server 20 calculates the lead time until the start time of utilization (step S24). Specifically, the analysis unit 212 of the control unit 21 calculates the time difference (lead time) from the current time to the planned execution time.

[0051] Next, the control unit 21 of the support server 20 determines the concentration grade according to the content of CO2 utilization (step S25). Specifically, the analysis unit 212 of the control unit 21 determines the required concentration grade and utilization amount of carbon dioxide according to the specified work content. For example, when mixing carbon dioxide into concrete, the concentration grade of the carbon dioxide mixed into the concrete and the mixing amount according to the amount of concrete are specified.

[0052] Next, the control unit 21 of the support server 20 determines the separation method according to the lead time (step S26). Specifically, the analysis unit 212 of the control unit 21 specifies the separation method capable of generating the utilization amount and concentration of carbon dioxide required for construction within the lead time. For example, when there is sufficient lead time, a separation method with low cost is prioritized. On the other hand, when the lead time is short, a separation method with high separation speed is prioritized.

[0053] Next, the control unit 21 of the support server 20 issues a separation instruction (step S27). Specifically, the instruction unit 213 of the control unit 21 outputs a separation instruction to the management device 30. This separation instruction includes information on the carbon dioxide separation method.

[0054] (Operation of the Embodiment) Since the recovery line 101 and the recovery device 10 are provided at the construction site, the carbon dioxide discharged from the construction machine M1 is stored within the construction site.

[0055] (Effect of the Embodiment) (1) In this embodiment, a recovery line is arranged in the outer groove (step S11). Thereby, the exhaust gas discharged from the construction machine M1 can be recovered by using the external structure partitioned as the construction site.

[0056] (2) In this embodiment, the control unit 21 of the support server 20 acquires the planned construction (step S12) and specifies the work content of the construction machine (step S13). Thereby, the construction machine M1 that emits carbon dioxide can be specified.

[0057] (3) In this embodiment, the control unit 21 of the support server 20 specifies the arrangement and operating range of the construction machine according to the work content (step S14). Thereby, the installation position of the exhaust gas recovery pipe 105 can be determined.

[0058] (4) In this embodiment, the control unit 21 of the support server 20 sets the specifications of the recovery pipe 105 according to the work content (step S15). Thereby, the minimum size of the recovery pipe 105 required for exhaust gas recovery can be determined.

[0059] (5) In this embodiment, when it is detected that the construction work of the day has ended, the control unit 21 of the support server 20 acquires the storage information of the exhaust gas (step S22). Thereby, the situation of the exhaust gas to be separated can be grasped. Since carbon dioxide is separated after the construction work of the day is completed, the overall energy consumption at the construction site can be leveled.

[0060] (6) In this embodiment, the start time of CO2 utilization is acquired (step S23), and the lead time until the start time of utilization is calculated (step S24). Thereby, the time available for carbon dioxide separation can be grasped.

[0061] (7) In this embodiment, the control unit 21 of the support server 20 determines the concentration grade (step S25) and determines the separation method according to the grace period (step S26) according to the usage content of CO2. Thereby, considering the cost performance, the separation method of carbon dioxide can be determined.

[0062] (8) In this embodiment, the carbon dioxide stored in the CO2 storage device 113 is used in the processing equipment device 150. Thereby, since the carbon dioxide generated at the construction site 100 can be used within the construction site 100, the labor such as transportation can be suppressed.

[0063] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically non - conflicting range. · In the above embodiment, as the construction machine M1, for example, an excavator can be used. The construction machine M1 is not limited to an excavator. As long as it is a construction machine M1 that emits carbon dioxide, it can also be applied to a bulldozer, a wheel loader, a crane, a pile driver, a concrete pump truck, etc.

[0064] · In the above embodiment, the recovery line 101 is provided on the exterior structure around the construction site 100. The arrangement of this recovery line 101 is not limited to the periphery of the construction site 100. For example, the construction information storage unit 22 and the work plan storage unit 23 may be used to identify the locations where the construction machine M1 may be installed. Then, the recovery line 101 is arranged in an area where the exhaust gas can be recovered from the construction machine M1 within the range of this location. · In the above embodiment, the recovery line 101 is provided on the exterior structure around the construction site 100. This recovery line 101 may be used in combination with a rainwater pipe for collecting rainwater. As shown in FIG. 7, the exhaust gas 171 and the rainwater 172 are recovered by the same recovery line 161. In this case, the recovery pipe 105 of the exhaust gas 171 is connected above the recovery line 161, and the recovery pipe 162 of the rainwater 172 is connected below the recovery line 161. Thereby, the backflow of the exhaust gas 171 into the recovery pipe 162 can be suppressed by the rainwater 172 accumulated below. In this case, the pipe diameter of the recovery line 161 is determined in consideration of the maximum drainage volume by the rainwater 172.

[0065] · In the above embodiment, as the processing equipment device 150, a device for mixing carbon dioxide into concrete is used. Here, if carbon dioxide can be utilized, the processing method is not limited. For example, when there is a rock formation or ground suitable for carbon dioxide immobilization underground at the construction site, a device for immobilizing it underground at the site can be used. It can also be used as a shielding gas for welding work at the construction site. Further, at the construction site, dry ice may be produced from carbon dioxide and used for cooling. Also, carbon dioxide may be stored in a container and transported to the processing equipment device 150 located at another place.

[0066] · In the above embodiment, the separation device 112 separates carbon dioxide from the exhaust gas using the membrane separation method. If carbon dioxide can be separated, it is not limited to the membrane separation method, and an absorbent, solid adsorption, etc. may be used. For example, as methods for separating carbon dioxide, in addition to the membrane separation method, there are chemical absorption methods, chemical adsorption methods, physical adsorption methods, etc. The chemical absorption method is a method of chemically reacting carbon dioxide with an absorbent and capturing it in the absorbent. As the absorbent, ammonia, sodium hydroxide, calcium hydroxide, etc. are used. The chemical adsorption method is a method of chemically reacting carbon dioxide with an adsorbent and capturing it on the surface of the adsorbent. As the adsorbent, alumina, silica, zeolite, etc. are used. The physical adsorption method is a method of capturing carbon dioxide on the surface of the adsorbent by the surface tension of the adsorbent. As the adsorbent, activated carbon, zeolite, silica gel, etc. are used. Among these methods, the separation method is determined in consideration of the required time and cost until a predetermined concentration grade is reached.

[0067] · In the above embodiment, the support server 20 includes a control unit 21, a construction information storage unit 22, and a work plan storage unit 23. It is not limited to the construction management information and work plan information by BIM as long as information on construction machinery used at the construction site and the construction performed using the construction machinery can be specified. Note that the BIM in this embodiment includes CIM (Construction Information Modeling / Management) used for civil engineering work and the like, and is a concept indicating a modeling technology that can be provided for the entire construction.

[0068] · In the above embodiment, the control unit 21 of the support server 20 performs acquisition of the construction schedule (step S12) to an instruction for arranging the recovery pipe up to the recovery line (step S16). These processes may be performed manually.

[0069] · In the above embodiment, the control unit 21 of the support server 20 performs storage information of exhaust gas (step S22) to a separation instruction (step S27). These processes may be performed manually.

[0070] · In the above embodiment, when it is determined that the construction work of the day has ended, the control unit 21 of the support server 20 acquires the storage information of the exhaust gas (step S22). Here, the work plan information recorded in the work plan storage unit 23 is used to determine the end of the construction work of the day. The method for determining the end of the construction work is not limited to the case of using the work plan. For example, a predetermined time may be used. Also, the power consumption at the construction site may be detected and a time zone with low power consumption may be utilized.

[0071] · In the above embodiment, when it is determined that the construction work of the day has ended, the control unit 21 of the support server 20 acquires the storage information of the exhaust gas (step S22). Here, without waiting for the end of the construction work of the day, during the construction work of the day, the separation of carbon dioxide may be performed in parallel with the recovery of the exhaust gas at the same time. In this case, according to the storage status of the exhaust gas, it is confirmed that the storage capable of separating carbon dioxide has been reached. Thereby, the separation can be performed with a time margin until the time of use of carbon dioxide.

[0072] · In the above embodiment, the recovery device 10 includes an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. Alternatively, a plurality of separation devices 112 may be provided at multiple locations in the recovery line 101. In this case, the recovery line for transporting the gas with a low carbon dioxide concentration before separation and the recovery line for transporting the gas with a high carbon dioxide concentration after separation are separated. Further, the separation device 112 may be moved according to the work location on the day.

[0073] · In the above embodiment, the recovery device 10 includes an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. Here, instead of storing the separated carbon dioxide, it may be used in the processing equipment device 150.

[0074] Next, the technical ideas that can be grasped from the above embodiment and alternative examples are added below. (a1) A carbon dioxide management system or a carbon dioxide management method, further comprising an exhaust gas storage facility within the construction site that temporarily stores the exhaust gas transported by the transportation facility at the construction site. (a2) A carbon dioxide management system or a carbon dioxide management method, further comprising a processing facility for processing the carbon dioxide stored by the storage facility. (b1) Storing the exhaust gas discharged during the operation of construction machinery at the construction site, separating carbon dioxide from the exhaust gas, identifying the construction content using the carbon dioxide from the construction plan, and determining the concentration grade of the carbon dioxide according to the construction content. A carbon dioxide management system or a carbon dioxide management method characterized by this.

[0075] (b2) In the construction content, identifying the next construction scheduled time, calculating the lead time from the start time of carbon dioxide separation to the construction scheduled time, and determining the carbon dioxide separation method according to the lead time. The carbon dioxide management system or the carbon dioxide management method according to (b1) above, characterized by this.

[0076] (c1) Identify the working content of construction machinery at the construction site, Identify the arrangement of the construction machinery according to the working content, A carbon dioxide management system or a carbon dioxide management method, characterized in that the specifications of the carbon dioxide recovery pipe are determined according to the working content and the arrangement of the construction machinery.

[0077] (c2) Obtain a work plan for construction machinery, The carbon dioxide management system or the carbon dioxide management method according to (c1) above, characterized in that the working content of the construction machinery is identified in the work plan.

[0078] (c3) Obtain BIM information of the construction object at the construction site, The carbon dioxide management system or the carbon dioxide management method according to (c1) or (c2) above, characterized in that the working content of the construction machinery is identified based on the construction work of the members in the BIM information.

[0079] (d1) A computer is used to, Identify the working content of construction machinery at the construction site, Identify the arrangement of the construction machinery according to the working content, A carbon dioxide management program, characterized in that it functions as a means for determining the specifications of the carbon dioxide recovery pipe according to the working content and the arrangement of the construction machinery.

Explanation of symbols

[0080] A1... Carbon dioxide management system, M1... Construction machinery, 100... Construction site, 101... Recovery line, 105... Recovery pipe, 10... Recovery device, 111... Exhaust gas storage device, 112... Separation device, 113... CO2 storage device, 150... Processing equipment device, 20... Support server, 21... Control unit, 22... Construction information storage unit, 23... Work plan storage unit, 30... Management device.

Claims

1. A transport facility for transporting exhaust gas emitted from a construction machine used at a construction site within the construction site; A separation facility at the construction site that separates carbon dioxide from the exhaust gas transported by the transport facility; A carbon dioxide management system comprising: a storage facility at the construction site that stores the carbon dioxide separated by the separation facility so that it can be utilized.

2. 2. The carbon dioxide management system according to claim 1, wherein the transport facility is provided in a storm water pipe installed at the construction site.

3. Conveying equipment, separating equipment and storage equipment will be provided at the construction site. Using the conveying equipment, exhaust gas discharged from a construction machine used at the construction site is conveyed to the separation equipment within the construction site; Using the separation equipment, carbon dioxide is separated from the exhaust gas transported by the transport equipment; A carbon dioxide management method, comprising: storing the carbon dioxide separated by the separation equipment at the construction site using the storage equipment so that the carbon dioxide can be utilized.

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