Carbon dioxide injection system

Abstract

The utility model provides a carbon dioxide injection system which comprises a carbon dioxide liquid tank and at least one transmission channel, one end of each transmission channel is communicated with the carbon dioxide liquid tank, and the other end of each transmission channel is communicated with a concrete carbonization device. A switch valve is arranged on each transmission channel, the transmission channels are communicated with the carbon dioxide liquid tank and the concrete carbonization device when the switch valves are in an open state, and the transmission channels are not communicated with the carbon dioxide liquid tank and the concrete carbonization device when the switch valves are in a closed state; the monitoring device is used for collecting carbon dioxide state parameters. The carbon dioxide injection system can accurately control the injection of carbon dioxide according to the carbon dioxide state parameters collected by the monitoring device, so that the injection efficiency is improved, and the quality of concrete after the carbon dioxide is injected is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete production, and in particular relates to a carbon dioxide injection system for injecting carbon dioxide into concrete. Background Art

[0002] To support the goals set by the Paris Agreement and promote the use of renewable energy, countries have established carbon reduction targets and related action plans. The construction industry is currently one of the largest emitters of greenhouse gases (GHGs) and a major source of these gases in cities. As we all know, concrete is one of the most widely used materials in the construction industry. In many countries and regions, ready-mix concrete production accounts for the majority of annual concrete production. However, the manufacturing process of ready-mix concrete generates significant amounts of carbon dioxide, which increases greenhouse gas emissions. Therefore, reducing CO2 emissions during concrete production can help achieve carbon reduction goals.

[0003] Concrete carbonation involves adding a medium such as carbon dioxide to concrete, causing it to chemically react with the alkaline substances within. Injecting carbon dioxide into concrete, it reacts with the cement to form calcium carbonate, reducing the porosity within the concrete and thereby improving its density and durability. This process utilizes carbon dioxide from industrial waste gas, reducing its environmental impact. It also improves the mechanical properties and durability of concrete while reducing carbon dioxide emissions during the concrete production process.

[0004] In the prior art, carbon dioxide gas is injected into a mixture of water, cement and aggregates when carbonizing precast concrete. However, the control of parameters such as the injection pressure, injection volume, and processing time of the carbon dioxide will affect the injection effect and reduce efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a carbon dioxide injection system which can improve the carbon dioxide injection efficiency and facilitate the control of carbon dioxide injection parameters during the carbonization of precast concrete.

[0006] To solve the above technical problems, the utility model discloses a carbon dioxide injection system, comprising: a carbon dioxide liquid tank, which stores carbon dioxide; at least one transmission channel, one end of each transmission channel is connected to the carbon dioxide liquid tank and the other end is connected to a concrete carbonization device; each transmission channel is provided with a switch valve, when the switch valve is in an open state, the transmission channel is connected to the carbon dioxide liquid tank and the concrete carbonization device, and when the switch valve is in a closed state, the transmission channel is not connected to the carbon dioxide liquid tank and the concrete carbonization device; and a monitoring device, which is used to collect state parameters of carbon dioxide; the monitoring device includes at least one pressure sensor, each pressure sensor is provided on the transmission channel, and is used to collect the pressure of carbon dioxide transmitted in the transmission channel.

[0007] By adopting the above technical solution, the injection process of carbon dioxide can be accurately controlled according to the state parameters of carbon dioxide collected by the monitoring device to improve the injection efficiency, especially the pressure of the injected carbon dioxide can be accurately controlled.

[0008] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, the carbon dioxide stored inside the carbon dioxide liquid tank is liquid carbon dioxide; at least one transmission channel includes: a first transmission channel, one end of which is connected to the upper part of the carbon dioxide liquid tank, for transmitting gaseous carbon dioxide; a second transmission channel, one end of which is connected to the lower part of the carbon dioxide liquid tank, for transmitting liquid carbon dioxide.

[0009] By adopting the above technical solution, gaseous carbon dioxide can be injected into the transmission channel to purge the transmission channel first, and then liquid carbon dioxide can be injected at a predetermined pressure for reaction, thereby improving the carbon dioxide injection efficiency and reducing energy consumption.

[0010] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, the monitoring device also includes a mass sensor, which is connected to the carbon dioxide liquid tank and is used to collect the mass of carbon dioxide in the carbon dioxide liquid tank.

[0011] By adopting the above technical solution, carbon dioxide can be injected into the concrete carbonization device according to the quality control of the output carbon dioxide.

[0012] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, the monitoring device further includes a timer, and the timer is used to collect the duration of the open state of each control valve.

[0013] By adopting the above technical solution, the injection of carbon dioxide into the concrete prefabrication device can be controlled according to the time of outputting carbon dioxide.

[0014] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, the first transmission channel and the second transmission channel respectively include an upstream section and a downstream section, wherein each upstream section is arranged between the carbon dioxide liquid tank and the corresponding switch valve, and each downstream section is arranged between the corresponding switch valve and the concrete carbonization device; the downstream section of the first transmission channel and the downstream section of the second transmission channel are merged to form an output section, and at least one pressure sensor is arranged on the output section.

[0015] According to another specific embodiment of the present invention, the carbon dioxide injection system disclosed in the embodiment of the present invention also includes a valve box, in which part of the upstream section of the first transmission channel and the second transmission channel, each switching valve, and part of the output section are arranged; and at least one pressure sensor includes a first pressure sensor, and the first pressure sensor is arranged in the valve box.

[0016] According to another specific embodiment of the present invention, the carbon dioxide injection system disclosed in the embodiment of the present invention also includes a pressurized valve and a pressurized gas source, one end of the pressurized valve is connected to the pressurized gas source, and the other end is connected to the output section; and the pressurized valve is arranged in the valve box.

[0017] According to another specific embodiment of the present invention, the carbon dioxide injection system disclosed in the embodiment of the present invention, the monitoring device also includes at least one temperature sensor, each temperature sensor is arranged on the output section, and is used to collect the temperature of the carbon dioxide transmitted in the transmission channel; wherein at least one temperature sensor includes a first temperature sensor, and the first temperature sensor is arranged in the valve box.

[0018] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, at least one pressure sensor includes a second pressure sensor, and the second pressure sensor is arranged at one end of the output section close to the concrete carbonization device; and at least one temperature sensor includes a second temperature sensor, and the second temperature sensor is arranged at one end of the output section close to the concrete carbonization device.

[0019] According to another specific embodiment of the present invention, the carbon dioxide injection system disclosed in the embodiment of the present invention further includes a nozzle, which is arranged at the end of the output section near one end of the concrete carbonization device; the outlet of the nozzle has a pressurizing hole; the at least one temperature sensor includes a third temperature sensor, and the third temperature sensor is arranged on the nozzle.

[0020] According to another specific embodiment of the present invention, in the carbon dioxide injection system disclosed in the embodiment of the present invention, the diameter of the pressurization hole is 2.5 to 5 mm.

[0021] According to another specific embodiment of the present invention, the carbon dioxide injection system disclosed in the embodiment of the present invention also includes a control module, which is connected to the monitoring device and the switch valve respectively, and controls the opening or closing of the switch valve according to the state parameters of carbon dioxide collected by the monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a simplified structural diagram of an embodiment of the carbon dioxide injection system of the present utility model;

[0023] Figure 2 This is a structural schematic diagram of another embodiment of the carbon dioxide injection system of the present invention;

[0024] Figure 3 This is a structural schematic diagram from another angle of another embodiment of the carbon dioxide injection system of the present invention, wherein the valve box door is in an open state;

[0025] Figure 4 It is a structural diagram of the control module of the carbon dioxide injection system of the present utility model;

[0026] Figure 5 This is an example of the parameter interface displayed by the control module of the carbon dioxide injection system of the present invention during a specific injection process;

[0027] Figure 6 This is a flow chart of a control process of the carbon dioxide injection system of the present utility model;

[0028] Figure 7 This is a structural schematic diagram of another embodiment of the valve box and its interior of the carbon dioxide injection system of the present invention;

[0029] Figure 8 It is a schematic cross-sectional structural diagram of the nozzle of the carbon dioxide injection system of the present utility model.

[0030] Description of reference numerals:

[0031] 10. Carbon dioxide liquid tank;

[0032] 20. Transmission channel; 21. On / off valve; 211. Gas carbon dioxide on / off valve; 212. Liquid carbon dioxide on / off valve;

[0033] 22. First transmission channel; 221. Upstream section of first transmission channel; 23. Second transmission channel; 231. Upstream section of second transmission channel; 24. Output section; 25. Regulating valve; 26. Pressure relief valve; 27. Pressure gauge; 28. One-way valve; 29. Nozzle; 291. Pressurization hole; 292. Through hole;

[0034] 30. Monitoring device; 31. First pressure sensor; 32. Second pressure sensor; 33. Mass sensor; 34. First temperature sensor; 35. Second temperature sensor; 36. Third temperature sensor;

[0035] 40. Control module; 41. Operation panel; 42. Start button; 43. Fault indicator light; 44. Emergency stop button;

[0036] 50. Valve box;

[0037] 60. Pressurized pipeline; 61. Pressurized valve; 62. Ball valve; 63. Check valve. DETAILED DESCRIPTION

[0038] Injecting carbon dioxide into concrete can reduce carbon emissions, mitigate its environmental impact, and improve concrete's mechanical properties and durability. Carbon dioxide injection into concrete primarily occurs within concrete carbonation units, such as concrete batching plants. However, simple injection lacks precise control, impacting efficiency. Therefore, there is a need for carbon dioxide injection equipment that can accurately control injection parameters.

[0039] In order to solve the above problems, the utility model provides a carbon dioxide injection system, such as Figure 1-Figure 3 As shown, the carbon dioxide injection system includes a carbon dioxide liquid tank 10 , at least one transmission channel 20 and a monitoring device 30 .

[0040] The carbon dioxide liquid tank 10 stores liquid carbon dioxide and can output gaseous carbon dioxide and / or liquid carbon dioxide. Further, the carbon dioxide liquid tank 10 can be a conventional carbon dioxide storage tank in the prior art.

[0041] At least one transmission channel 20 is used to transmit the carbon dioxide in the carbon dioxide liquid tank 10 to the concrete carbonization device (such as a concrete mixing plant, not shown in the figure). The specific number of the transmission channels 20 is set according to specific needs. One end of each transmission channel 20 is connected to the carbon dioxide liquid tank 10, and the other end leads to the concrete carbonization device; each transmission channel 20 is provided with a switch valve 21. When the switch valve 21 is in the open state, the transmission channel 20 connects the carbon dioxide liquid tank 10 and the concrete carbonization device, and the carbon dioxide in the carbon dioxide liquid tank 10 can be transmitted to the concrete carbonization device. Figure 1 The middle arrow shows the flow direction of the carbon dioxide fluid when the switch valve 21 is in the open state; when the switch valve 21 is in the closed state, the transmission channel 20 is not connected to the carbon dioxide liquid tank 10 and the concrete carbonization device, and the carbon dioxide in the carbon dioxide liquid tank 10 cannot be transmitted to the concrete carbonization device. Figure 1 As shown, a regulating valve 25, a pressure relief valve 26, a pressure gauge 27, a one-way valve 28, etc. can also be provided on the transmission channel 20 as needed.

[0042] The monitoring device 30 is used to collect state parameters of carbon dioxide so as to control the opening or closing of the switch valve 21 according to the state parameters to control the transmission of carbon dioxide. The monitoring device 30 includes at least one pressure sensor (31 / 32), each of which is disposed on the transmission channel 20 and is used to collect the pressure of carbon dioxide transmitted in the transmission channel 20.

[0043] When the carbon dioxide injection system provided by the present invention is used, the switch valve 21 is opened to transmit the carbon dioxide in the carbon dioxide liquid tank 10 to the concrete carbonization device, and the carbon dioxide state parameters collected by the monitoring device 30, including the output carbon dioxide pressure collected by the pressure sensor (31 / 32), are closed when the carbon dioxide state parameters reach a preset value, such as when the output carbon dioxide reaches a predetermined amount or when the carbon dioxide pressure changes significantly.

[0044] The carbon dioxide injection system provided by the present invention can accurately control the injection of carbon dioxide based on the carbon dioxide state parameters collected by the monitoring device to improve the injection efficiency and ensure that a certain amount of carbon dioxide is injected into the concrete carbonization device within a predetermined time (for example, within 90 seconds).

[0045] According to one specific embodiment of the present invention, Figure 1 As shown, the carbon dioxide injection system also includes a control module 40, which is connected to the monitoring device 30 and the switch valve 21 respectively, and controls the opening and closing of the switch valve 21 according to the state parameters of carbon dioxide collected by the monitoring device 30. Specifically, the control module 40 is electrically connected to the monitoring device 30 through an electric wire, and the monitoring device 30 transmits the collected state parameters of carbon dioxide to the control console. The control panel is also connected to the switch valve 21, and controls the opening or closing of the switch valve 21 according to the state parameters collected and transmitted by the monitoring device 30, wherein the control module 40 pre-stores the preset values that the specific state parameters of carbon dioxide need to reach. Figure 4 As shown, the console may be a PLC ("Programmable Logic Controller") console having an operation interface 41 through which the monitoring device 30 can perform control operations; Figure 5 This is an example of the operation interface 41 of the control module 40 during a specific injection process. There are different control keys in the operation interface 41. Clicking them will lead to the relevant interface. For example, clicking the main interface key will display the main interface shown in the figure. Clicking the parameter interface will enter the parameter interface, which can display the specific parameters of the injection process. Figure 4 As shown, the console can also be provided with a start button 42, a fault indicator light 43, and an emergency stop button 44. The start button 42 is used for local start operation. After local start, the corresponding main interface can display a manual start signal; the fault indicator light 43 is used to alarm for system faults. When the system has a fault alarm, the fault indicator light 43 lights up; the emergency stop button 44 is the same as the emergency stop operation. If the system encounters an attack situation during operation and needs to stop immediately, you can press the emergency stop button 44 and the system will stop.

[0046] According to one embodiment of the present invention, liquid carbon dioxide is stored in the carbon dioxide tank 10; Figure 1-Figure 3 As shown, at least one transmission channel 20 includes a first transmission channel 22 and a second transmission channel 23. One end of the first transmission channel 22 is connected to the upper portion of the carbon dioxide liquid tank 10 for transmitting gaseous carbon dioxide, and the first transmission channel 22 is provided with a gaseous carbon dioxide on-off valve 211. One end of the second transmission channel 23 is connected to the lower portion of the carbon dioxide liquid tank 10 for transmitting liquid carbon dioxide, and the second transmission channel 23 is provided with a liquid carbon dioxide on-off valve 212. The specific structure of the carbon dioxide liquid tank 10 can be a conventional carbon dioxide liquid tank structure, and this application will not be repeated here.

[0047] It should be noted that when storing liquid carbon dioxide, the pressure within the carbon dioxide tank 10 must reach above 15 bar before the carbon dioxide injection step. Furthermore, to maintain the liquid carbon dioxide during the transfer process, the pressure within the second transfer channel 23 must also be maintained above 15 bar. Therefore, to prevent a sudden drop in pressure within the transfer channel 20, the distance between the carbon dioxide tank 10 and the concrete carbonization device must be less than 20 meters, and can be 15 meters, 10 meters, or even closer.

[0048] When the carbon dioxide injection device of the above embodiment is used, the gaseous carbon dioxide switch valve 211 can be opened first to transmit the gaseous carbon dioxide to the concrete carbonization device, and the pressure sensor is used to monitor the carbon dioxide pressure in the first transmission channel 22 in real time. When the output gaseous carbon dioxide reaches a certain pressure (e.g., 10 bar), the gaseous carbon dioxide switch valve 22 is closed; then the liquid carbon dioxide switch valve 23 is opened to transmit the liquid carbon dioxide to the concrete carbonization device, and the pressure sensor is used to monitor the carbon dioxide pressure in the transmission channel 20 in real time to ensure that the pressure of the second transmission channel 23 is maintained within a preset pressure range (e.g., above 15 bar). Once the pressure changes significantly, the liquid carbon dioxide switch valve 212 of the second transmission channel 22 is closed in time. By using this method, the transmission channel is first purged with gaseous carbon dioxide to facilitate the subsequent liquid carbon dioxide injection step. Furthermore, when injecting liquid carbon dioxide, the liquid carbon dioxide can be injected into the concrete carbonization device in a very short time (e.g., 90 seconds or less), thereby greatly improving the injection efficiency of the liquid carbon dioxide. Of course, it is also possible to inject only liquid carbon dioxide into the concrete carbonization device, as long as the transmission channel is unobstructed and does not affect the injection efficiency of the liquid carbon dioxide.

[0049] According to one specific embodiment of the present invention, Figure 1 and Figure 3As shown, the first transmission channel 22 includes an upstream section 221 and a downstream section, wherein the upstream section 221 is the first transmission channel 22 between the carbon dioxide liquid tank 10 and the gaseous carbon dioxide switch valve 211, and the downstream section is the first transmission channel 22 between the gaseous carbon dioxide switch valve 211 and the concrete carbonization device; similarly, the second transmission channel 23 includes an upstream section 231 and a downstream section, wherein the upstream section 231 is the second transmission channel 23 between the carbon dioxide liquid tank 10 and the liquid carbon dioxide switch valve 212, and the downstream section is the second transmission channel 23 between the liquid carbon dioxide switch valve 212 and the concrete carbonization device. That is, both the first transmission channel 22 and the second transmission channel 23 have an upstream section, a switch valve, and a downstream section arranged in sequence. In this embodiment, as shown in FIG. Figure 1 and Figure 3 As shown, the downstream section of the first transmission channel 22 and the downstream section of the second transmission channel 23 are merged. That is, the first transmission channel 22 is connected downstream of the gaseous carbon dioxide on-off valve 211, and the second transmission channel 23 is connected downstream of the liquid carbon dioxide on-off valve 212, and is connected to form a channel, namely the output section 24. Both gaseous carbon dioxide and liquid carbon dioxide are output to the concrete carbonization device through the output section 24. At least one pressure sensor (31 / 32) is provided on the output section 24. It should be noted that the terms "upstream" and "downstream" in this utility model refer to the direction of carbon dioxide flow, and carbon dioxide is transmitted from upstream to downstream.

[0050] According to one specific embodiment of the present invention, Figure 1-Figure 3 As shown, the monitoring device 30 also includes a mass sensor 33, which is connected to the carbon dioxide liquid tank 10 and is used to collect the mass of the carbon dioxide in the carbon dioxide liquid tank 10. Specifically, the mass sensor 33 can be a platform scale. The carbon dioxide liquid tank 10 storing carbon dioxide is placed on the platform scale. The platform scale measures the mass of the carbon dioxide therein, and the mass of the output carbon dioxide is then determined based on the change in mass. Furthermore, if a control module 40 is provided, the mass sensor 33 is connected to the control module 40.

[0051] The carbon dioxide injection system of the above embodiment can be used to inject carbon dioxide into the concrete carbonization device in a weighing mode. The pressure sensor (31 / 32) collects the pressure of the injected gaseous carbon dioxide, and the mass sensor 33 collects the mass of the carbon dioxide in the carbon dioxide liquid tank 10. Control is performed based on the pressure of the gaseous carbon dioxide and the mass of the output carbon dioxide.

[0052] like Figure 6 As shown, the process of injecting carbon dioxide into a precast concrete device in a weighing mode includes the following steps:

[0053] S101 : Open the gaseous carbon dioxide switch valve 211 , and the storage container 10 outputs the gaseous carbon dioxide to the concrete prefabrication device through the first transmission channel 22 .

[0054] S102 : The pressure sensor ( 31 / 32 ) collects the pressure of the gaseous carbon dioxide in the transmission channel 20 , and the mass sensor 33 continuously collects the mass of the carbon dioxide in the storage container 10 .

[0055] S103: When the pressure of the gaseous carbon dioxide in the output section 24 reaches a preset pressure value, the gaseous carbon dioxide switch valve 211 is closed, the liquid carbon dioxide switch valve 212 is opened, and liquid carbon dioxide is injected into the concrete prefabrication device through the second transmission channel 23; the preset pressure value may be 10 bar.

[0056] S104: Calculate the mass change of the carbon dioxide in the storage container 10. When the mass change reaches a preset mass, close the liquid carbon dioxide switch valve 212; the preset mass is 1 to 8 kilograms.

[0057] Furthermore, in the case where the downstream section of the first transmission channel 22 and the downstream section of the second transmission channel 23 are combined to form an output section 24 , the following step S105 may be further included.

[0058] S105: Open the gaseous carbon dioxide switch valve 211 to input gaseous carbon dioxide into the transmission channel 20. The transmission channel 20 is cleaned and purged for a predetermined time to push the remaining liquid carbon dioxide out of the transmission channel 20. When the cleaning and purging time reaches a preset time, the gaseous carbon dioxide switch valve 211 is closed, where the preset time is at least 6 seconds.

[0059] According to one specific embodiment of the present invention, the monitoring device further includes a timer (not shown in the figure), which is used to collect the duration of the open state of each switch valve 21; and if a control module is provided, the timer is connected to the control module.

[0060] The carbon dioxide injection system of the above embodiment can use a timer to collect the injection time of the carbon dioxide, and control the opening or closing of the switch valve according to the injection time of the carbon dioxide.

[0061] According to one specific embodiment of the present invention, Figure 2 and Figure 3As shown, the carbon dioxide injection system also includes a valve box 50, in which part of the upstream section 221 of the first transmission channel and the gaseous carbon dioxide switch valve 211, part of the upstream section 231 of the second transmission channel and the liquid carbon dioxide switch valve 212, and the upstream part of the output section 24 are arranged; and at least one pressure sensor (31 / 32) includes a first pressure sensor 31, and the first pressure sensor 31 is arranged in the valve box 50, that is, the first pressure sensor 31 is arranged at the upstream position of the output section 24.

[0062] Set up a valve box and centrally place multiple devices that require power supply, such as switch valves, pressure sensors, etc. in the valve box. The valve box can be set near the electrical box to facilitate the layout of wires.

[0063] According to one specific embodiment of the present invention, Figure 1 and Figure 7 As shown, the at least one pressure sensor (31 / 32) further includes a second pressure sensor 32. The second pressure sensor 32 is disposed at one end of the output section 24, downstream of the valve box 50 and adjacent to the concrete carbonization device. In the case of a control module 40, the second pressure sensor 32 is connected to the control module 40.

[0064] According to one specific embodiment of the present invention, Figure 1-Figure 3 As shown, the monitoring device 30 further includes at least one temperature sensor (34 / 35 / 36), each temperature sensor (34 / 35 / 36) being disposed on the output section 24 for collecting the temperature of the carbon dioxide transmitted in the transmission channel 20; Figure 1 and Figure 3 As shown, the at least one temperature sensor (34 / 35 / 36) includes a first temperature sensor 34, which is disposed in the valve box 50. In the case of a control module 40, the first temperature sensor 34 is connected to the control module 40.

[0065] According to one specific embodiment of the present invention, Figure 1-Figure 3 As shown, the at least one temperature sensor (34 / 35 / 36) further includes a second temperature sensor 35. The second temperature sensor 35 is disposed in the downstream portion of the output section 24 outside the valve box 50, near one end of the concrete carbonization device. In the case of a control module 40, the second temperature sensor 35 is connected to the control module 40.

[0066] In the technical solution of this application, both pressure and temperature affect the state of carbon dioxide. A pressure sensor is used to ensure that the pressure parameters within the pipeline are correct, indicating that the carbon dioxide state is normal and there is no pipeline blockage, thereby ensuring carbon dioxide injection efficiency. During the process of transporting liquid carbon dioxide, to avoid blockage in the transmission channel, the pressure throughout the entire transmission process must be maintained at approximately 20 bar. Therefore, pressure sensors are installed upstream and downstream of the output section to collect the carbon dioxide pressure within the transmission channel to monitor the pressure throughout the entire transmission process. This arrangement allows for timely implementation of appropriate measures to prevent channel blockage if the pressure detected by any pressure sensor changes suddenly, indicating a possible blockage. A temperature sensor also serves to monitor the state of liquid carbon dioxide within the channel. If the temperature within the channel is too high or too low, it may be due to channel blockage or leakage, allowing for timely channel inspection and other measures. It should be noted that the number of pressure sensors and temperature sensors in the carbon dioxide injection system of the present invention is not specifically limited. The specific number is selected based on the length of the transmission channel, the transmission environment, and other factors. For example, if the transmission channel is relatively long, a third pressure sensor and a fourth pressure sensor may be installed.

[0067] According to one specific embodiment of the present invention, Figure 1 and Figure 7 As shown, the carbon dioxide injection system further includes a pressurized pipeline 60, which has a pressurized valve 61 and a pressurized gas source (not shown in the figure). One end of the pressurized valve 61 is connected to the pressurized gas source, and the other end is connected to the output section 24. When the pressurized valve 61 is open, the pressurized gas from the pressurized gas source can be passed into the output section 24; Figure 1 As shown, a ball valve 62 and a one-way valve 63 can also be provided on the pressurized pipeline 60. Figure 7 As shown, the pressurizing valve 61 is provided in the valve box 50, specifically, it can be provided at the most upstream of the output section 24, that is, upstream of the first pressure sensor 31 and the first temperature sensor 34. In the case of a control module 40, the pressurizing valve 61 can be connected to the control module 40, and the control module 40 controls the opening or closing of the pressurizing valve 61 according to the pressure parameters of the transmission channel 20 collected by the monitoring device 30. If the switch valve 21 of each transmission channel 20 is in the closed state and no carbon dioxide is transmitted in the transmission channel 20, if the pressure sensor (31 / 32) collects the pressure of the output section 24 and it does not meet the preset parameters, it indicates that the transmission channel 20 may be blocked, and pressurized gas can be injected by opening the pressurizing valve 61 to clear the transmission channel 20. The pressurized gas source can specifically be an air pressurizing device.

[0068] According to one specific embodiment of the present invention, Figure 2 and Figure 3As shown, the carbon dioxide injection system further includes a nozzle 29, which is disposed at the end of the output section 24 close to one end of the concrete carbonization device, that is, the nozzle 29 is downstream of the second pressure sensor 32 and the second temperature sensor 35; Figure 8 As shown, the nozzle 29 has a pressurizing hole 291 at its outlet. The nozzle 29 serves two functions: firstly, to facilitate the injection of liquid carbon dioxide into the concrete carbonization device; secondly, the pressurizing hole 291 in the nozzle 29 reduces the phase transition of the liquid carbon dioxide. Preferably, the diameter of the pressurizing hole 291 is set to 2.5 to 5 mm; and the diameter of the main channel upstream of the pressurizing hole 291 in the nozzle 29 can be 15 to 20 mm, for example, 17 mm, 19 mm, etc.

[0069] like Figure 1-Figure 3 As shown, the at least one temperature sensor further includes a third temperature sensor 36, which is disposed on the nozzle 29 and is used to collect the temperature of the carbon dioxide at the nozzle 29. In the case of a control module 40, the third temperature sensor 36 is connected to the control module 40. Figure 8 As shown, the third temperature sensor 36 can be set at the main channel position through the through hole 292.

[0070] Using the carbon dioxide injection system provided by the present invention during the concrete precast process, carbon dioxide is injected into concrete according to the aforementioned weighing control mode. The resulting concrete product, upon testing, meets the compressive strength, wear resistance and skid resistance, water absorption, dimensional tolerance, shrinkage, and / or fire resistance requirements specified in relevant standards. This demonstrates that the carbon dioxide injection system provided by the present invention can ensure the quality of concrete after carbon dioxide injection.

[0071] It should be noted that, in addition to the implementation methods of the present invention described in the above-mentioned specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide an in-depth understanding of the present utility model, the above description contains many specific details, and the present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0072] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0073] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0074] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0075] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0076] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A carbon dioxide injection system, characterized in that: include: A carbon dioxide liquid tank, which stores carbon dioxide; at least one transmission channel, one end of each transmission channel being connected to the carbon dioxide liquid tank and the other end being connected to the concrete carbonization device; each transmission channel being provided with a switch valve, wherein when the switch valve is in an open state, the transmission channel is connected to the carbon dioxide liquid tank and the concrete carbonization device, and when the switch valve is in a closed state, the transmission channel is not connected to the carbon dioxide liquid tank and the concrete carbonization device; as well as A monitoring device for collecting state parameters of carbon dioxide; the monitoring device includes at least one pressure sensor, each of which is arranged on the transmission channel and is used to collect the pressure of the carbon dioxide transmitted in the transmission channel.

2. The carbon dioxide injection system according to claim 1, characterized in that: At least part of the carbon dioxide stored in the carbon dioxide liquid tank is liquid carbon dioxide; The at least one transmission channel comprises: a first transmission channel, one end of which is in communication with the upper portion of the carbon dioxide liquid tank and is used for transmitting gaseous carbon dioxide; The second transmission channel has one end connected to the lower part of the carbon dioxide liquid tank and is used for transmitting liquid carbon dioxide.

3. The carbon dioxide injection system according to claim 2, characterized in that: The monitoring device further includes a mass sensor, which is connected to the carbon dioxide liquid tank and is used to collect the mass of the carbon dioxide in the carbon dioxide liquid tank.

4. The carbon dioxide injection system according to claim 2, characterized in that: The monitoring device further includes a timer, which is used to collect the duration of the open state of each of the switch valves.

5. The carbon dioxide injection system according to claim 2, characterized in that: The first transmission channel and the second transmission channel respectively include an upstream section and a downstream section, wherein each upstream section is arranged between the carbon dioxide liquid tank and the corresponding switch valve, and each downstream section is arranged between the corresponding switch valve and the concrete carbonization device; The downstream section of the first transmission channel and the downstream section of the second transmission channel are combined to form an output section, and the at least one pressure sensor is arranged on the output section.

6. The carbon dioxide injection system according to claim 5, characterized in that: further comprising a valve box, in which parts of the upstream sections of the first transmission channel and the second transmission channel, each of the switch valves, and part of the output section are disposed; and The at least one pressure sensor includes a first pressure sensor disposed in the valve box.

7. The carbon dioxide injection system according to claim 6, characterized in that: It also includes a pressurizing valve and a pressurizing gas source, one end of the pressurizing valve is connected to the pressurizing gas source, and the other end is connected to the output section, and the pressurizing valve is arranged in the valve box.

8. The carbon dioxide injection system according to claim 6, characterized in that: The monitoring device further comprises at least one temperature sensor, each of the temperature sensors being arranged on the output section and configured to collect the temperature of the carbon dioxide transmitted in the transmission channel; in The at least one temperature sensor includes a first temperature sensor disposed in the valve box.

9. The carbon dioxide injection system according to claim 8, characterized in that: The at least one pressure sensor includes a second pressure sensor, and the second pressure sensor is disposed at one end of the output section close to the concrete carbonization device; and The at least one temperature sensor includes a second temperature sensor, and the second temperature sensor is provided at one end of the output section close to the concrete carbonization device.

10. The carbon dioxide injection system according to claim 9, characterized in that: It also includes a nozzle, which is arranged at the end of the output section close to one end of the concrete carbonization device; the outlet of the nozzle has a pressurizing hole; The at least one temperature sensor includes a third temperature sensor disposed on the nozzle.

11. The carbon dioxide injection system according to claim 10, characterized in that: The diameter of the boost hole is 2.5 to 5 mm.

12. A carbon dioxide injection system according to any one of claims 1 to 11, characterized in that: It also includes a control module, which is connected to the monitoring device and the switch valve respectively, and controls the opening or closing of the switch valve according to the state parameters of the carbon dioxide collected by the monitoring device.

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