Preparation device and preparation process of carbon-sequestration premixed concrete

Abstract

The invention relates to the technical field of concrete preparation, in particular to a preparation device and a preparation process of carbon-sequestration premixed concrete, and solves the problems that in the existing preparation process of the carbon-sequestration premixed concrete, carbon dioxide gas is inconvenient to inject into the concrete, so that a pipeline is easily blocked, and the production efficiency is high. And concentration control during carbon self-sequestration of the carbon dioxide gas is inconvenient. The device comprises a fixed carbon preparation mechanism and a split-flow carbon injection mechanism, a stirring driving mechanism is installed on the inner side of the middle of the fixed carbon preparation mechanism, a sealing pressure maintaining mechanism is installed at the upper end of the fixed carbon preparation mechanism, and the split-flow carbon injection mechanism is installed on the inner side of the bottom end of the fixed carbon preparation mechanism; the split-flow carbon injection mechanism comprises a conical separation strip; and the conical separation strip is fixedly connected with the bottom end of the stirring and material placing shell. Carbon dioxide gas is conveyed in a pressurized mode, the pipeline can be effectively prevented from being blocked by concrete, the concentration of the carbon dioxide gas can be conveniently monitored and adjusted, and high efficiency of carbon sequestration is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete preparation, and specifically to a device and a preparation process for carbon sequestration ready-mixed concrete. Background Technique

[0002] The functions of carbon sequestration ready-mixed concrete mainly include permanently sequestering carbon dioxide emitted from industries, and at the same time improving the strength and durability of concrete. Its working principle is to collect carbon dioxide emitted from industries and inject it into the concrete, enabling it to undergo a mineralization reaction with the cementitious components and other alkaline components in the concrete to form carbonate products, thereby permanently solidifying carbon dioxide in the concrete. This technology not only realizes the sequestration and utilization of carbon dioxide, but also improves the workability and compressive strength of the concrete. During the existing preparation process of carbon sequestration ready-mixed concrete, it is not convenient to inject carbon dioxide gas into the concrete, which is likely to cause blockage of the pipeline, and it is not convenient to control the concentration of carbon dioxide gas during carbon sequestration; therefore, it does not meet the existing requirements. For this reason, we propose a device and a preparation process for carbon sequestration ready-mixed concrete. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and a preparation process for carbon sequestration ready-mixed concrete to solve the problems raised in the above background technique that during the existing preparation process of carbon sequestration ready-mixed concrete, it is not convenient to inject carbon dioxide gas into the concrete, which is likely to cause blockage of the pipeline, and it is not convenient to control the concentration of carbon dioxide gas during carbon sequestration. To achieve the above purpose, the present invention provides the following technical solutions: A device for preparing carbon sequestration ready-mixed concrete includes a carbon sequestration preparation mechanism and a split-flow carbon injection mechanism. A stirring drive mechanism is installed inside the middle of the carbon sequestration preparation mechanism, a sealing and pressure-holding mechanism is installed at the upper end of the carbon sequestration preparation mechanism, and a split-flow carbon injection mechanism is installed inside the bottom end of the carbon sequestration preparation mechanism; The split-flow carbon injection mechanism includes a conical partition strip, which is fixedly connected to the bottom end of the stirring and material-placement housing. A plurality of carbon injection units are installed inside the conical partition strip. Each carbon injection unit includes a positioning seat. Conical air guide holes are provided on both sides of the positioning seat. A gas guide sleeve is installed between the two conical air guide holes. A limiting top seat is installed at the bottom end of the gas guide sleeve. Gas transmission branch pipes are fixedly provided on both sides of the bottom end of the gas guide sleeve. A blocking block is slidably connected inside the gas guide sleeve. A second support spring is provided at the upper end of the blocking block, and a guide post is installed inside the second support spring. Preferably, the carbon fixation preparation mechanism includes a support housing, a stirring and feeding housing is fixedly installed inside the support housing, a diversion chamber is provided between the support housing and the stirring and feeding housing, a gas transmission monitoring unit is installed at the rear end face of the support housing, support frames are fixedly installed at both the front and rear ends of the support housing, the two support frames are symmetrically installed relative to the support housing, a holding pressure strip is fixedly installed at the upper end of the support housing, two discharge ports are fixedly installed at the lower part of one end of the support housing, the discharge ports penetrate the support housing and are connected to the inside of the stirring and feeding housing in a through manner, and the holding pressure strip is sleeved and installed on the outer sides of the upper ends of the support housing and the stirring and feeding housing. Preferably, the gas transmission monitoring unit includes a monitoring panel, the monitoring panel is fixedly connected to the support housing, a display screen is fixedly provided on the surface of the monitoring panel, a pressure gauge, an air delivery pipe and a carbon dioxide delivery pipe are fixedly installed at the upper end of the monitoring panel, the pressure gauge, the air delivery pipe and the carbon dioxide delivery pipe are arranged linearly, the pressure gauge, the air delivery pipe and the carbon dioxide delivery pipe are all connected to the diversion chamber through the monitoring panel in a through manner, solenoid valves are arranged inside the air delivery pipe and the carbon dioxide delivery pipe, a pressure sensor is arranged inside the pressure gauge, and the display screen is electrically connected to the sensor. Preferably, the sealing and pressure maintaining mechanism includes two semi-circular mounting plates, the two semi-circular mounting plates are fixedly connected to both ends of the holding pressure strip, two movable protective covers are movably installed between the two semi-circular mounting plates, the bottom ends of the two movable protective covers are rotatably connected to the holding pressure strip through pin shafts, sealing gaskets are provided between the movable protective covers and the semi-circular mounting plates, a hydraulic cylinder is rotatably connected to one end of the movable protective cover, the bottom ends of the two hydraulic cylinders are rotatably connected to an oil cylinder mounting seat, an exhaust unit is installed in the middle of the semi-circular mounting plate, and the two semi-circular mounting plates and the exhaust unit are symmetrically installed relative to the support housing. Preferably, the exhaust unit includes a mounting sleeve, a gas concentration sensor is installed at the upper end of the mounting sleeve, a plugging seat is slidably connected inside the mounting sleeve, a first support spring is provided at one end of the plugging seat, a limiting air-permeable sheet is fixedly installed at one end of the first support spring, the limiting air-permeable sheet is fixedly connected to the semi-circular mounting plate through the mounting sleeve, one end of the plugging seat penetrates the mounting sleeve and is connected to the limiting air-permeable sheet through the first support spring, the bottom end of the gas concentration sensor is inserted into the inside of the mounting sleeve, and the gas concentration sensor is connected to the mounting sleeve through a thread. Preferably, the stirring drive mechanism includes a gear box, the gear box is fixedly connected to the support housing, a drive motor is fixedly installed on one side of the gear box, drive shafts are rotatably connected to the inner sides of both ends of the gear box, a drive frame is fixedly installed on the outer side of the middle of the drive shaft, and a plurality of spiral blades are provided on the outer sides of the two drive frames. Preferably, a gear set is provided inside the gearbox. The output end of the drive motor penetrates the gearbox and is in transmission connection with the two drive shafts through the gear set. The rotation directions of the two drive shafts are opposite, and the two drive shafts and the multiple spiral blades are fixedly connected through drive frames. Preferably, the conical partition strip is located between the two drive frames. The multiple carbon injection units are linearly arranged along the side of the conical partition strip. The conical partition strip is fixedly connected with the multiple positioning seats. The inside of the air guide sleeve is connected to the adjacent two conical air holes in a penetrating manner. The inside of the air guide sleeve is connected to the shunt chamber through two air delivery branch pipes. Preferably, the limiting top seat is fixedly connected with the support housing through screws. The upper end of the air guide sleeve penetrates the stirring and material placing housing and the positioning seat and is in threaded connection with the conical partition strip. The air guide sleeve is connected with the plugging block through the second support spring. The upper end of the guide post penetrates the plugging block and the second support spring and is in threaded connection with the air guide sleeve. The bottom end of the guide post is in close contact with the upper end surface of the limiting top seat. The present invention also provides a carbon fixation premixed concrete preparation process for preparing carbon fixation premixed concrete. The carbon fixation premixed concrete preparation process is realized through a carbon fixation premixed concrete preparation device. The carbon fixation premixed concrete preparation process includes the following steps: S1: Air is conveyed to the inside of the shunt chamber through an air conveying pipe. The inside of the air guide sleeve is connected to the shunt chamber through two air delivery branch pipes, so that the internal pressure balance between the shunt chamber and the inside of the air guide sleeve can be maintained through the air delivery branch pipes. By adjusting the air pressure in the shunt chamber, the plugging block compresses the second support spring and plugs the conical air hole. At this time, the inside of the air guide sleeve is in an initial air pressure balance state. The power is turned on, and the two hydraulic cylinders drive the two movable protective covers to rotate in opposite directions relative to the holding pressure strip under the support of the cylinder mounting seat. Then, the two movable protective covers are in an unfolded state and separated from the semi-circular mounting plate. At this time, it is convenient to place a quantitatively proportioned cement and mineral admixture inside the stirring and material placing housing. S2: After the material is placed, the paired movable protective covers are reset, so that the upper part of the carbon fixation preparation mechanism can be hermetically isolated by the two movable protective covers and the semi-circular mounting plate. The drive motor is started, and the drive motor drives the two drive shafts to rotate in opposite directions synchronously through the gear set provided inside the gearbox under the support of the gearbox. Then, the drive shafts drive the spiral blades to rotate reciprocally through the drive frames and fully stir the cement and mineral admixture to form concrete. S3: The gas guide sleeve is blocked by the blocking block to effectively prevent concrete from seeping into the interior of the gas guide sleeve. While the concrete is being stirred, carbon dioxide gas is introduced into the inner side of the shunt chamber through the carbon dioxide delivery pipe. Then, the carbon dioxide gas is shunted through multiple carbon injection units and enters the interior of the gas guide sleeve. The interior of the gas guide sleeve is in a carbon fixation air pressure balance state, and the carbon fixation air pressure is greater than the initial air pressure, causing the carbon dioxide gas to push the blocking block upward on the inner side of the gas guide sleeve, achieving the through connection between the conical gas holes and the gas guide sleeve and delivering the carbon dioxide gas to the inner side of the stirring and feeding housing; S4: Then, the carbon dioxide gas is introduced from the bottom of the stirred concrete and reacts chemically with the cement and mineral admixtures in the concrete to form multiple new minerals mainly composed of calcium carbonate, thereby achieving carbon solidification and sequestration, reducing the amount of cement used in the concrete. At the same time, a quantitative viscosity-reducing polycarboxylate water reducer is placed in the concrete to reduce the viscosity and pumping resistance of the concrete, thereby improving the pumping efficiency and pumping height. The use of a mixture of recycled aggregate and ordinary aggregate reduces the water-cement ratio and improves the freeze-thaw resistance of recycled concrete; S5: The blocking seat can exhaust the carbon dioxide gas used for carbon fixation under the support of the first support spring, maintaining the stability of the carbon dioxide gas concentration during the carbon fixation process. At the same time, the concentration of the carbon dioxide gas can be monitored through the gas concentration sensor. After the concrete is prepared, rapid discharging operation can be carried out through the two discharging ports, and air is introduced again through the air delivery pipe to facilitate the flushing of the concrete in the conical gas holes, thereby avoiding the residue and accumulation of concrete. Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, air is delivered to the inner side of the shunt chamber through the air delivery pipe. The air pressure balance between the shunt chamber and the interior of the gas guide sleeve can be maintained through the air delivery branch pipe. By adjusting the air pressure in the shunt chamber, the blocking block compresses the second support spring and blocks the conical gas holes. The interior of the gas guide sleeve is in an initial air pressure balance state. The upper part of the carbon fixation preparation mechanism can be sealed and isolated by the two movable protective covers and the semi-circular mounting plate. The driving motor synchronously drives the two transmission shafts to rotate in opposite directions through the gear set. Then, the transmission shafts drive the spiral blades to rotate reciprocally through the transmission frame and fully stir the cement and mineral admixtures to form concrete; 2. The present invention effectively prevents concrete from seeping into the air guide casing through the plugging block. Carbon dioxide gas is shunted through multiple carbon injection units and enters the interior of the air guide casing. The interior of the air guide casing is in a carbon sequestration air pressure balance state, and the carbon sequestration air pressure is greater than the initial air pressure, causing the carbon dioxide gas to push the plugging block to move upward on the inner side of the air guide casing. Then, the carbon dioxide gas is introduced from the bottom of the stirred concrete and reacts chemically with the cement and mineral admixtures in the concrete to form various new minerals mainly composed of calcium carbonate, thereby achieving carbon solidification and storage and reducing the amount of cement used in the concrete. 3. The present invention places a quantitative viscosity-reducing polycarboxylate superplasticizer into the concrete to reduce the viscosity and pumping resistance of the concrete, thereby improving the pumping efficiency and pumping height. The plugging seat can exhaust the carbon dioxide gas used for carbon sequestration under the support of the first support spring, maintaining the stability of the carbon dioxide gas concentration during the carbon sequestration process. At the same time, the concentration of carbon dioxide gas can be monitored through a gas concentration sensor, and air is introduced again through the air delivery pipe to facilitate flushing of the concrete in the conical air holes, thereby avoiding the residue and accumulation of concrete. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a rear view of the whole of the present invention; Figure 3 is a rear view of the carbon sequestration preparation mechanism of the present invention; Figure 4 is a schematic sectional structural diagram of the whole of the present invention; Figure 5 of the present invention Figure 4 is an enlarged structural diagram of area A; Figure 6 is a top view of the stirring drive mechanism of the present invention; Figure 7 is a schematic sectional structural diagram of the carbon sequestration preparation mechanism of the present invention; Figure 8 of the present invention Figure 7 is an enlarged structural diagram of area B. In the figure: 1. Carbon fixation preparation mechanism; 101. Support frame; 102. Support housing; 103. Holding pressure strip; 104. Gas transmission monitoring unit; 105. Discharge port; 106. Monitoring panel; 107. Display screen; 108. Pressure gauge; 109. Air delivery pipe; 110. Carbon dioxide delivery pipe; 111. Stirring and feeding housing; 112. Diverting chamber; 2. Sealing and pressure maintaining mechanism; 201. Movable protective cover; 202. Semi-circular mounting plate; 203. Exhaust unit; 204. Oil cylinder mounting seat; 205. Hydraulic oil cylinder; 206. Mounting sleeve; 207. Gas concentration sensor; 208. Plugging seat; 209. Limiting air-permeable sheet; 210. First support spring; 3. Stirring drive mechanism; 301. Driving motor; 302. Gear box; 303. Transmission shaft; 304. Transmission frame; 305. Spiral blade; 4. Diverting and carbon injection mechanism; 401. Conical partition strip; 402. Carbon injection unit; 403. Positioning seat; 404. Conical air guide hole; 405. Limiting top seat; 406. Air guide sleeve; 407. Gas transmission branch pipe; 408. Guide post; 409. Plugging block; 410. Second support spring. Detailed implementation mode Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The hydraulic oil cylinder 205 (model number HOB80X250-100) and the driving motor 301 (model number YEJ3-112M-4) mentioned in the present invention can be obtained from the market or customized privately. Please refer to Figures 1 to 4 , an embodiment provided by the present invention: a carbon fixation premixed concrete preparation device, including a carbon fixation preparation mechanism 1 and a diverting and carbon injection mechanism 4. The carbon fixation preparation mechanism 1 includes a support housing 102. A stirring and feeding housing 111 is fixedly installed inside the support housing 102. A gas transmission monitoring unit 104 is installed on the rear end face of the support housing 102. Support frames 101 are fixedly installed at both the front and rear ends of the support housing 102. The two support frames 101 are symmetrically installed relative to the support housing 102. A holding pressure strip 103 is fixedly installed at the upper end of the support housing 102. Two discharge ports 105 are fixedly installed at the lower part of one end of the support housing 102. The discharge ports 105 penetrate the support housing 102 and are connected to the inside of the stirring and feeding housing 111 in a through manner. The holding pressure strip 103 is sleeved and installed on the outside of the upper ends of the support housing 102 and the stirring and feeding housing 111. A diverting chamber 112 is provided between the support housing 102 and the stirring and feeding housing 111, which is convenient for the transmission and diversion of air and carbon dioxide gas. Please refer to Figure 2 and Figure 3, the gas transmission monitoring unit 104 includes a monitoring panel 106. The monitoring panel 106 is fixedly connected to the support housing 102. A display screen 107 is fixedly provided on the surface of the monitoring panel 106. A pressure gauge 108, an air delivery pipe 109, and a carbon dioxide delivery pipe 110 are fixedly installed at the upper end of the monitoring panel 106. The pressure gauge 108, the air delivery pipe 109, and the carbon dioxide delivery pipe 110 are linearly arranged. The pressure gauge 108, the air delivery pipe 109, and the carbon dioxide delivery pipe 110 are all connected to the shunt chamber 112 through the monitoring panel 106 in a penetrating manner. Solenoid valves are provided inside the air delivery pipe 109 and the carbon dioxide delivery pipe 110, and a pressure sensor is provided inside the pressure gauge 108. The display screen 107 is electrically connected to the sensor. Through the air delivery pipe 109 and the carbon dioxide delivery pipe 110, it is convenient to input air and carbon dioxide gas respectively and display the air pressure through the pressure gauge 108. Please refer to Figure 1 , Figure 4 and Figure 6 , a stirring drive mechanism 3 is installed inside the middle of the carbon fixation preparation mechanism 1. The stirring drive mechanism 3 includes a gearbox 302. The gearbox 302 is fixedly connected to the support housing 102. A drive motor 301 is fixedly installed on one side of the gearbox 302. Drive shafts 303 are rotatably connected to the inner sides of both ends of the gearbox 302. A gear set is provided inside the gearbox 302. The output end of the drive motor 301 penetrates the gearbox 302 and is in transmission connection with the two drive shafts 303 through the gear set. The rotation directions of the two drive shafts 303 are opposite. A drive frame 304 is fixedly installed on the outer side of the middle of the drive shaft 303. A plurality of spiral blades 305 are provided on the outer sides of the two drive frames 304. The two drive shafts 303 and the plurality of spiral blades 305 are all fixedly connected through the drive frame 304, so that the drive motor 301 synchronously drives the two drive shafts 303 to rotate in opposite directions through the gear set. Furthermore, the drive shafts 303 drive the spiral blades 305 to rotate reciprocally through the drive frame 304 and fully stir the cement and mineral admixture to form concrete. Please refer to Figures 1 to 4, a sealing and pressure maintaining mechanism 2 is installed at the upper end of the carbon sequestration preparation mechanism 1. The sealing and pressure maintaining mechanism 2 includes two semi-circular mounting plates 202. The two semi-circular mounting plates 202 are fixedly connected to both ends of the holding strip 103. Two movable protective covers 201 are movably installed between the two semi-circular mounting plates 202. The bottom ends of the two movable protective covers 201 are rotatably connected to the holding strip 103 through pin shafts. A sealing gasket is provided between the movable protective cover 201 and the semi-circular mounting plate 202. One end of the movable protective cover 201 is rotatably connected to a hydraulic cylinder 205. The bottom ends of the two hydraulic cylinders 205 are rotatably connected to an oil cylinder mounting seat 204. An exhaust unit 203 is installed in the middle of the semi-circular mounting plate 202. The two semi-circular mounting plates 202 and the exhaust unit 203 are symmetrically installed relative to the support housing 102. The two movable protective covers 201 and the semi-circular mounting plates 202 can seal and isolate during concrete carbon sequestration to keep the pressure of carbon dioxide gas stable. Please refer to Figure 4 and Figure 5 , the exhaust unit 203 includes a mounting sleeve 206. A gas concentration sensor 207 is installed at the upper end of the mounting sleeve 206. A plugging seat 208 is slidably connected to the inner side of the mounting sleeve 206. One end of the plugging seat 208 is provided with a first support spring 210. One end of the first support spring 210 is fixedly installed with a limiting air-permeable sheet 209. The limiting air-permeable sheet 209 is fixedly connected to the semi-circular mounting plate 202 through the mounting sleeve 206. One end of the plugging seat 208 penetrates through the mounting sleeve 206 and is connected to the limiting air-permeable sheet 209 through the first support spring 210. The bottom end of the gas concentration sensor 207 is inserted into the interior of the mounting sleeve 206. The gas concentration sensor 207 is threadedly connected to the mounting sleeve 206. The plugging seat 208 can exhaust the carbon dioxide gas used for carbon sequestration under the support of the first support spring 210. The gas concentration sensor 207 can monitor the concentration of carbon dioxide gas. Please refer to Figures 4 to 7 , a flow splitting and carbon injection mechanism 4 is installed inside the bottom end of the carbon sequestration preparation mechanism 1. The flow splitting and carbon injection mechanism 4 includes a conical dividing strip 401. The conical dividing strip 401 is located between two transmission frames 304. The conical dividing strip 401 is fixedly connected to the bottom end of the stirring and feeding housing 111. A plurality of carbon injection units 402 are installed inside the conical dividing strip 401. The plurality of carbon injection units 402 are linearly arranged along the side of the conical dividing strip 401. The plurality of carbon injection units 402 facilitate the flow splitting of carbon dioxide gas and uniformly injecting it into the interior of the concrete; Please refer to Figure 7 and Figure 8, the carbon injection unit 402 includes a positioning seat 403. The conical partition strip 401 is fixedly connected to a plurality of positioning seats 403. Conical air guide holes 404 are provided on both sides of the positioning seat 403. An air guide sleeve 406 is installed between the two conical air guide holes 404. The upper end of the air guide sleeve 406 penetrates through the stirring and feeding housing 111 and the positioning seat 403 and is threadedly connected to the conical partition strip 401. The inside of the air guide sleeve 406 is connected to the adjacent two conical air guide holes 404 in a through manner. A limiting top seat 405 is installed at the bottom end of the air guide sleeve 406. The limiting top seat 405 is fixedly connected to the support housing 102 by screws. The air guide sleeve 406 is fixed by jacking up through the limiting top seat 405, which is convenient for the disassembly and assembly of the air guide sleeve 406; Gas delivery branch pipes 407 are fixedly provided on both sides of the bottom end of the air guide sleeve 406. The inside of the air guide sleeve 406 is connected to the shunt chamber 112 in a through manner through the two gas delivery branch pipes 407. A plugging block 409 is slidably connected to the inside of the air guide sleeve 406. A second support spring 410 is provided at the upper end of the plugging block 409. The air guide sleeve 406 is connected to the plugging block 409 through the second support spring 410. A guide post 408 is installed inside the second support spring 410. The upper end of the guide post 408 penetrates through the plugging block 409 and the second support spring 410 and is threadedly connected to the air guide sleeve 406. The bottom end of the guide post 408 is in close contact with the upper end surface of the limiting top seat 405. When the pressure of the carbon dioxide gas increases, the plugging block 409 is pushed to move upward inside the air guide sleeve 406, realizing the through connection between the conical air guide hole 404 and the air guide sleeve 406 and delivering the carbon dioxide gas. The present invention also provides a carbon sequestration ready-mixed concrete preparation process for preparing carbon sequestration ready-mixed concrete. The carbon sequestration ready-mixed concrete preparation process is realized by a carbon sequestration ready-mixed concrete preparation device. The carbon sequestration ready-mixed concrete preparation process includes the following steps: S1: Air is conveyed to the inner side of the shunt chamber 112 through the air conveying pipe 109. The inside of the air guiding sleeve 406 is connected to the shunt chamber 112 through two air conveying branch pipes 407 in a through connection manner, so that the pressure balance between the shunt chamber 112 and the inside of the air guiding sleeve 406 can be maintained through the air conveying branch pipes 407. By adjusting the air pressure in the shunt chamber 112, the plugging block 409 compresses the second support spring 410 and plugs the conical air guide hole 404. At this time, the inside of the air guiding sleeve 406 is in an initial air pressure balance state. The power is turned on, and the two hydraulic cylinders 205 drive the two movable protective covers 201 to rotate in opposite directions relative to the holding pressing strip 103 under the supporting action of the cylinder mounting seat 204. Then, the two movable protective covers 201 are in an unfolded state and separated from the semi-circular mounting plate 202. At this time, it is convenient to place a quantitative ratio of cement and mineral admixture into the inner side of the stirring and feeding housing 111; S2: After the feeding is completed, the pair of movable protective covers 201 are reset, so that the upper part of the carbon fixation preparation mechanism 1 can be sealed and isolated by the two movable protective covers 201 and the semi-circular mounting plate 202. The driving motor 301 is started, and the driving motor 301 drives the two transmission shafts 303 to rotate in opposite directions synchronously through the gear set provided inside the gearbox 302 under the supporting action of the gearbox 302. Then, the transmission shafts 303 drive the spiral blades 305 to rotate reciprocally through the transmission frame 304 and fully stir the cement and mineral admixture to form concrete; S3: The plugging of the air guiding sleeve 406 by the plugging block 409 effectively prevents the concrete from infiltrating into the inside of the air guiding sleeve 406. While the concrete is being stirred, carbon dioxide gas is introduced into the inner side of the shunt chamber 112 through the carbon dioxide conveying pipe 110. Then, the carbon dioxide gas is shunted through the multiple carbon injection units 402 and enters the inside of the air guiding sleeve 406. The inside of the air guiding sleeve 406 is in a carbon fixation air pressure balance state, and the carbon fixation air pressure is greater than the initial air pressure, so that the carbon dioxide gas pushes the plugging block 409 to move upward inside the air guiding sleeve 406, realizing the through connection between the conical air guide hole 404 and the air guiding sleeve 406 and conveying the carbon dioxide gas to the inner side of the stirring and feeding housing 111; S4: Then, the carbon dioxide gas is introduced from the bottom of the stirred concrete and reacts with the cement and mineral admixture in the concrete to form a variety of new minerals mainly composed of calcium carbonate, thereby realizing carbon solidification and storage, reducing the amount of cement in the concrete. At the same time, a quantitative viscosity-reducing polycarboxylate water reducer is placed into the concrete to reduce the viscosity and pumping resistance of the concrete, thereby improving the pumping efficiency and pumping height. The use of a mixture of recycled aggregate and ordinary aggregate reduces the water-cement ratio and improves the frost resistance of recycled concrete; S5: Under the support of the first support spring 210, the plugging seat 208 can exhaust the carbon dioxide gas used for carbon fixation, maintaining the stability of the carbon dioxide gas concentration during the carbon fixation process. At the same time, the concentration of the carbon dioxide gas can be monitored through the gas concentration sensor 207. After the concrete is prepared, rapid discharging operation can be carried out through the two discharging ports 105, and air is introduced again through the air delivery pipe 109 to facilitate the flushing of the concrete in the conical air guide hole 404, thereby avoiding the residue and accumulation of the concrete. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A carbon sequestration ready-mixed concrete preparation device, comprising a carbon sequestration preparation mechanism (1) and a shunt carbon injection mechanism (4), characterized in that: Inside the middle of the carbon fixation preparation mechanism (1), a stirring drive mechanism (3) is installed. At the upper end of the carbon fixation preparation mechanism (1), a sealing and pressure maintaining mechanism (2) is installed. Inside the bottom end of the carbon fixation preparation mechanism (1), a flow splitting and carbon injection mechanism (4) is installed; The flow splitting and carbon injection mechanism (4) includes a conical partition strip (401). The conical partition strip (401) is fixedly connected to the bottom end of the stirring and material placing housing (111). Inside the conical partition strip (401), a plurality of carbon injection units (402) are installed. The carbon injection unit (402) includes a positioning seat (403). On both sides of the positioning seat (403), conical air guide holes (404) are provided. Between the two conical air guide holes (404), an air guide sleeve (406) is installed. At the bottom end of the air guide sleeve (406), a limiting top seat (405) is installed. On both sides of the bottom end of the air guide sleeve (406), air delivery branch pipes (407) are fixedly provided. Inside the air guide sleeve (406), a blocking block (409) is slidably connected. At the upper end of the blocking block (409), a second support spring (410) is provided. Inside the second support spring (410), a guiding column (408) is installed.

2. The carbon sequestration premixed concrete preparation device according to claim 1, characterized in that: The carbon fixation preparation mechanism (1) includes a support housing (102). Inside the support housing (102), a stirring and material placing housing (111) is fixedly installed. A flow splitting cavity (112) is provided between the support housing (102) and the stirring and material placing housing (111). At the rear end face of the support housing (102), a gas transmission monitoring unit (104) is installed. At the front and rear ends of the support housing (102), support frames (101) are fixedly installed. The two support frames (101) are symmetrically installed with respect to the support housing (102). At the upper end of the support housing (102), a holding pressure strip (103) is fixedly installed. At the lower part of one end of the support housing (102), two discharge ports (105) are fixedly installed. The discharge ports (105) penetrate through the support housing (102) and are connected to the inside of the stirring and material placing housing (111). The holding pressure strip (103) is sleeved and installed on the outer sides of the upper ends of the support housing (102) and the stirring and material placing housing (111).

3. The carbon sequestration premixed concrete preparation device according to claim 2, wherein: The gas transmission monitoring unit (104) includes a monitoring panel (106). The monitoring panel (106) is fixedly connected to the support housing (102). A display screen (107) is fixedly provided on the surface of the monitoring panel (106). A pressure gauge (108), an air delivery pipe (109), and a carbon dioxide delivery pipe (110) are fixedly installed at the upper end of the monitoring panel (106). The pressure gauge (108), the air delivery pipe (109), and the carbon dioxide delivery pipe (110) are arranged linearly. The pressure gauge (108), the air delivery pipe (109), and the carbon dioxide delivery pipe (110) are all connected to the shunt chamber (112) through the monitoring panel (106) in a penetrating manner. Solenoid valves are provided inside the air delivery pipe (109) and the carbon dioxide delivery pipe (110), and a pressure sensor is provided inside the pressure gauge (108). The display screen (107) is electrically connected to the sensor.

4. The carbon sequestration ready-mixed concrete preparation device according to claim 3, wherein: The sealing and pressure maintaining mechanism (2) includes two semi-circular mounting plates (202). Both ends of the two semi-circular mounting plates (202) are fixedly connected to the holding strip (103). Two movable protective covers (201) are movably installed between the two semi-circular mounting plates (202). The bottom ends of the two movable protective covers (201) are rotatably connected to the holding strip (103) through pin shafts. Sealing gaskets are provided between the movable protective covers (201) and the semi-circular mounting plates (202). One end of the movable protective cover (201) is rotatably connected to a hydraulic cylinder (205). The bottom ends of the two hydraulic cylinders (205) are rotatably connected to an oil cylinder mounting seat (204). An exhaust unit (203) is installed in the middle of the semi-circular mounting plate (202). The two semi-circular mounting plates (202) and the exhaust unit (203) are symmetrically installed relative to the support housing (102).

5. The carbon sequestration ready-mixed concrete preparation device according to claim 4, characterized in that: The exhaust unit (203) includes a mounting sleeve (206). A gas concentration sensor (207) is installed at the upper end of the mounting sleeve (206). A plugging seat (208) is slidably connected inside the mounting sleeve (206). A first support spring (210) is provided at one end of the plugging seat (208). A limiting air-permeable sheet (209) is fixedly installed at one end of the first support spring (210). The limiting air-permeable sheet (209) is fixedly connected to the semi-circular mounting plate (202) through the mounting sleeve (206). One end of the plugging seat (208) penetrates through the mounting sleeve (206) and is connected to the limiting air-permeable sheet (209) through the first support spring (210). The bottom end of the gas concentration sensor (207) is inserted into the interior of the mounting sleeve (206). The gas concentration sensor (207) is connected to the mounting sleeve (206) through a thread.

6. The carbon sequestration ready-mixed concrete preparation device according to claim 5, characterized in that: The stirring drive mechanism (3) includes a gearbox (302), the gearbox (302) is fixedly connected to the support housing (102), a drive motor (301) is fixedly installed on one side of the gearbox (302), both inner sides of the two ends of the gearbox (302) are rotatably connected to a transmission shaft (303), a transmission frame (304) is fixedly installed on the outer side of the middle of the transmission shaft (303), and a plurality of spiral blades (305) are arranged on the outer sides of the two transmission frames (304).

7. The carbon sequestration ready-mixed concrete preparation device according to claim 6, characterized in that: A gear set is provided inside the gearbox (302), the output end of the drive motor (301) penetrates through the gearbox (302) and is in transmission connection with the two transmission shafts (303) through the gear set, the rotation directions of the two transmission shafts (303) are opposite, and the two transmission shafts (303) and the plurality of spiral blades (305) are fixedly connected through the transmission frame (304).

8. The carbon sequestration ready-mixed concrete preparation device according to claim 7, characterized in that: The conical partition strip (401) is located between the two transmission frames (304), a plurality of carbon injection units (402) are linearly arranged along the side of the conical partition strip (401), the conical partition strip (401) is fixedly connected to a plurality of positioning seats (403), the inside of the air guide sleeve (406) is in through connection with two adjacent conical air holes (404), and the inside of the air guide sleeve (406) is in through connection with the shunt chamber (112) through two air delivery branch pipes (407).

9. The carbon sequestration ready-mixed concrete preparation device according to claim 8, characterized in that: The limit top seat (405) is fixedly connected to the support housing (102) by screws, the upper end of the air guide sleeve (406) penetrates through the stirring and material placing housing (111) and the positioning seat (403) and is in threaded connection with the conical partition strip (401), the air guide sleeve (406) is connected to the plugging block (409) through a second support spring (410), the upper end of the guide post (408) penetrates through the plugging block (409) and the second support spring (410) and is in threaded connection with the air guide sleeve (406), and the bottom end of the guide post (408) is in abutting contact with the upper end surface of the limit top seat (405).

10. A carbon sequestration ready-mixed concrete preparation process for preparing carbon sequestration ready-mixed concrete, characterized in that: The process for preparing carbonated ready-mixed concrete is realized by a carbonated ready-mixed concrete preparation device, and the process for preparing carbonated ready-mixed concrete includes the following steps: S1: Air is conveyed to the inner side of the shunt chamber (112) through the air conveying pipe (109). The interior of the air guide sleeve (406) and the shunt chamber (112) are connected through two air conveying branch pipes (407), so that the internal pressure balance between the shunt chamber (112) and the interior of the air guide sleeve (406) can be maintained through the air conveying branch pipes (407). By adjusting the air pressure in the shunt chamber (112), the plugging block (409) compresses the second support spring (410) and plugs the conical air guide hole (404). At this time, the interior of the air guide sleeve (406) is in an initial air pressure balance state. The power is turned on, and the two hydraulic cylinders (205) drive the two movable protective covers (201) to rotate in opposite directions relative to the holding strip (103) under the support of the cylinder mounting seat (204). Then, the two movable protective covers (201) are in an unfolded state and separated from the semi-circular mounting plate (202). At this time, it is convenient to place a quantitatively proportioned mixture of cement and mineral admixture inside the mixing and feeding housing (111). S2: After the feeding is completed, the paired movable protective covers (201) are reset, so that the upper part of the carbon fixation preparation mechanism (1) can be sealed and isolated by the two movable protective covers (201) and the semi-circular mounting plate (202). The drive motor (301) is started, and the drive motor (301) drives the two drive shafts (303) to rotate in opposite directions synchronously through the gear set provided inside the gearbox (302) under the support of the gearbox (302). Then, the drive shafts (303) drive the spiral blades (305) to rotate reciprocally through the drive frame (304) and fully mix the cement and mineral admixture to form concrete. S3: The plugging of the air guide sleeve (406) by the plugging block (409) effectively prevents the concrete from infiltrating into the interior of the air guide sleeve (406). While the concrete is being stirred, carbon dioxide gas is introduced into the inner side of the shunt chamber (112) through the carbon dioxide conveying pipe (110). Then, the carbon dioxide gas is shunted through multiple carbon injection units (402) and enters the interior of the air guide sleeve (406). The interior of the air guide sleeve (406) is in a carbon fixation air pressure balance state, and the carbon fixation air pressure is greater than the initial air pressure, so that the carbon dioxide gas pushes the plugging block (409) to move upward inside the air guide sleeve (406), realizing the through connection between the conical air guide hole (404) and the air guide sleeve (406) and conveying the carbon dioxide gas to the inner side of the mixing and feeding housing (111). S4: Then, the carbon dioxide gas is introduced from the bottom of the stirred concrete and reacts with the cement and mineral admixture in the concrete to form multiple new minerals mainly composed of calcium carbonate, thus realizing carbon solidification and sequestration, reducing the amount of cement used in the concrete. At the same time, a quantitative viscosity-reducing polycarboxylate water reducer is placed in the concrete to reduce the viscosity and pumping resistance of the concrete, thereby improving the pumping efficiency and pumping height. The use of a mixture of recycled aggregate and ordinary aggregate reduces the water-cement ratio and improves the freeze-thaw resistance of recycled concrete. S5: The plugging seat (208) can exhaust the carbon dioxide gas for carbon sequestration under the support of the first support spring (210), maintaining the stability of the carbon dioxide gas concentration during the carbon sequestration process. At the same time, the concentration of the carbon dioxide gas can be monitored through the gas concentration sensor (207). After the concrete is prepared, rapid discharging operations can be carried out through the two discharging ports (105), and air is introduced again through the air delivery pipe (109) to facilitate the flushing of the concrete in the conical air guide holes (404), thereby avoiding the residue and accumulation of the concrete.

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