Low-carbon recycled aggregate surface strengthening and micro-powder carbon mineralization integrated equipment

Abstract

The novel low-carbon recycled aggregate surface strengthening micro-powder carbon mineralization integrated equipment disclosed by the application comprises a rack, a carbonization cylinder one and a carbonization cylinder two, the carbonization cylinder one is horizontally installed on the rack through vibration, the top surface of the carbonization cylinder one is provided with a lower hopper, the top surface of the carbonization cylinder one is provided with an inlet, the lower hopper is provided with a buffer sealing structure, the bottom surface of the carbonization cylinder one is provided with a first discharge port and a second discharge port, the first discharge port is provided with a filter screen, the lower portion of the carbonization cylinder one is provided with the two carbonization cylinder two, the upper ends of the two carbonization cylinder two are in one-to-one correspondence with the first discharge port and the second discharge port and are communicated with the first discharge port and the second discharge port, the carbonization cylinder two is provided with a stirring rod, the lower ends of the two carbonization cylinder two are provided with lower outlets, the top surfaces of the two carbonization cylinder two are respectively provided with an air inlet and a liquid inlet, the carbonization cylinder one is provided with a rod body and a spiral blade, the rod body is provided with a rubbing part, and the surface of the rubbing part is provided with a stripping surface. Compared with the prior art, the carbonization effect of the aggregate is better.

Description

Technical Field

[0001] This invention relates to the field of construction waste recycling technology, and in particular to an integrated device for surface strengthening and carbon mineralization of low-carbon recycled aggregate. Background Technology

[0002] Construction waste refers to solid waste generated during construction and demolition activities. Waste concrete is a significant component of this solid waste. Crushing waste concrete yields recycled concrete aggregate. However, the surface cement mortar of recycled concrete aggregate suffers from drawbacks such as poor surface strength, low interfacial bonding, high and unstable water absorption, limiting its use to low-requirement concrete or foundation layer mixes, resulting in significant resource waste. Currently, carbonation is one of the effective technologies for enhancing the properties of recycled concrete aggregate. Carbonated recycled concrete aggregate can effectively improve the mechanical strength, workability, and durability of concrete, even achieving performance comparable to concrete made with natural aggregate. Existing methods for carbonating crushed recycled concrete aggregate mostly involve thoroughly mixing carbon dioxide gas, a carbonation reaction solution, and the recycled concrete aggregate to allow for a chemical reaction, completing the carbonation process. For example, free calcium ions in the mortar can combine with water and carbon dioxide gas to form a calcium carbonate layer, significantly improving the properties of the carbonated concrete aggregate. Existing concrete aggregate carbonization equipment, such as the solid waste recycled concrete aggregate carbonization device with application number 2024115742262, includes a mixing cylinder, a spiral injection structure, a sliding sealing plate, a telescopic mixing mechanism, a liquid addition structure, a curved aeration mechanism, and a sloped discharge channel. The sliding sealing plate is slidably disposed within the mixing cylinder. A through-slide opening is provided on one side of the mixing cylinder, through which the spiral injection structure is slidably disposed. The spiral injection structure is fixedly connected to the sliding sealing plate. One end of the sliding sealing plate near the spiral injection structure is between the spiral injection structure and the inner wall of the mixing cylinder. The liquid addition structure is disposed at the bottom of the spiral injection structure. The curved aeration mechanism is disposed at the top of the mixing cylinder. A discharge port is connected to the bottom of the mixing cylinder, and the sloped discharge channel is connected to the bottom of the discharge port. A closed structure is provided between the discharge port and the sloped discharge channel. In application, concrete aggregate is added into the mixing cylinder using a spiral injection structure. Simultaneously, carbonation reaction solution is added into the mixing cylinder through a liquid injection component. Carbon dioxide is introduced into the carbonation reaction solution through a curved aeration mechanism. The concrete aggregate and carbonation reaction solution are mixed and stirred using a telescopic mixing mechanism to complete the carbonation of the concrete aggregate. Finally, the concrete slurry is discharged through a sloping discharge channel.

[0003] However, the telescopic mixing mechanism of the aforementioned recycled concrete aggregate carbonation device only achieves the mixing of carbon dioxide gas, carbonation reaction solution, and aggregate through mixing frame one and mixing frame two. This means that the carbonation reaction solution and carbon dioxide gas only penetrate the surface of the concrete aggregate, requiring a long time, possibly several years or even longer, to achieve a deep carbonation effect. Moreover, it cannot peel off most of the mortar from the surface of the recycled concrete aggregate and grind it into fine powder, because the mortar powder contains a large number of uncarbonized free calcium ions, which can combine with carbon dioxide gas and liquid to form a calcium carbonate layer, thus significantly improving the properties of the carbonized concrete aggregate. This results in the mortar not being effectively utilized in the carbonation process, and the mortar powder not being fully utilized as a resource, leading to a poor carbonation effect.

[0004] In view of this, the inventors of this case conducted in-depth research on the problem, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated equipment for surface strengthening and carbonization of low-carbon recycled aggregates, which has the good effect of separating coarse and fine aggregates by peeling off cement mortar powder and simultaneously and rapidly carbonizing them. The carbonized mortar powder can be used as a raw material for cement, thus achieving low-carbon, energy-saving and emission-reduction, and solving the problem of poor carbonization effect of existing carbonization devices.

[0006] To achieve the objective, this invention adopts the following technical solution:

[0007] A low-carbon recycled aggregate surface-strengthened micro-powder carbon mineralization integrated equipment includes a frame and a mixing cylinder mounted on the frame. A stirring mechanism is rotatably installed inside the mixing cylinder. The mixing cylinder has a liquid inlet, a gas inlet, a feed inlet, and a discharge outlet. The mixing cylinder comprises a carbonization cylinder one and a carbonization cylinder two. Carbonization cylinder one is horizontally mounted on the frame via a vibrating device that drives it to vibrate. A hopper is located on the top surface of one axial end of carbonization cylinder one, and the feed inlet connected to the hopper is located on the top surface of carbonization cylinder one. The output end of the hopper is equipped with a discharge adjustment structure capable of adjusting the flow of aggregates of different particle sizes into carbonization cylinder one. A transverse discharge adjustment structure is located on the bottom surface of the other axial end of carbonization cylinder one. A first discharge port and a second discharge port are arranged at intervals. The first discharge port is located between the inlet and the second discharge port. A filter screen is provided within the range of the first discharge port. The carbonization cylinder 2 is erected below the carbonization cylinder 1, corresponding to the first discharge port and the second discharge port. The upper ends of the two carbonization cylinder 2 are respectively connected to the first discharge port and the second discharge port through a connecting hopper with a buffer for feeding and sealing the input end of the carbonization cylinder 2 after feeding. The carbonization cylinder 2 has an upright and rotatably installed stirring rod. The lower ends of the two carbonization cylinder 2 have a feeding port that can be controlled to be sealed or opened. The two feeding ports constitute the discharge port. The top surfaces of the two carbonization cylinder 2 are respectively provided with the above-mentioned gas filling port and liquid filling port.

[0008] A helical rod is rotatably installed inside the carbonization cylinder and extends along the axial direction of the carbonization cylinder. The helical rod has a rod body and helical blades extending along the length direction of the rod body. An abrasive is vertically installed on the outer wall of the rod body. The surface of the abrasive has a peeling surface with a concave-convex structure. The helical rod, the abrasive, and the stirring rod constitute the stirring mechanism.

[0009] With the axial direction of carbonization cylinder one as the left-right direction, the vibration device is installed on the bottom surface of carbonization cylinder one. The hopper is located above the left end of the top surface of carbonization cylinder one, and the inlet is located on the left end of the top surface of carbonization cylinder one. The hopper is connected to the inlet through the above-mentioned discharge adjustment structure. The first discharge port and the second discharge port are both located on the bottom surface of the right end of carbonization cylinder one, and the first discharge port is located to the left of the second discharge port. The first discharge port is supported by the first discharge hopper below, and the second discharge port is supported by the second discharge hopper below. The filter screen is installed in the upper end of the first discharge hopper, and the first discharge hopper and the second discharge hopper are respectively connected to the two carbonization cylinders two through the connecting hopper. The lower end of the carbonization cylinder two has a control mechanism to control the release or cut-off of aggregate in the carbonization cylinder two. The rod is horizontally arranged in the carbonization cylinder one along the left-right direction.

[0010] The vibration device is a vibration motor, which is installed on the left end of the bottom surface of the carbonization cylinder. The frame has several uprights set on the front and rear sides of the carbonization cylinder. A connecting rod is set horizontally on the outer side wall of the carbonization cylinder above the uprights. The upper end of the uprights is connected to the end of the connecting rod through a vibration damping mechanism.

[0011] The vibration damping mechanism consists of two vertically arranged vibration damping rubbers, which are horizontally spaced apart. The bottom surfaces of the two vibration damping rubbers are connected to a lower connecting plate, which is locked to the top surface of the upright. The top surfaces of the two vibration damping rubbers are connected to an upper connecting plate. The top surface of the upper connecting plate has a protruding lower protrusion, and the top surface of the lower protrusion has a recessed lower groove. The top surface of the lower protrusion is locked with an upper protrusion, and the bottom surface of the upper protrusion has a recessed upper groove corresponding to the position of the lower groove. The upper groove and the lower groove form an insert groove for the connecting rod to be embedded.

[0012] The output end of the hopper is equipped with a bar valve, and the output end of the hopper is connected to the feed inlet of the carbonization cylinder through the bar valve. The bar valve is the aforementioned discharge adjustment structure.

[0013] The connecting hopper is a counterweight valve. The input ends of the two counterweight valves are respectively connected to the output ends of the first discharge hopper and the second discharge hopper, and the output ends of the two counterweight valves are respectively connected to the input ends of the two carbonized cylinders.

[0014] The stirring rod is vertically positioned inside the carbonization cylinder. The output end of the carbonization cylinder is equipped with a discharge valve that controls the opening or sealing of the output end of the carbonization cylinder. This discharge valve is the aforementioned control mechanism.

[0015] There is a material space between the outer wall of the spiral blade and the inner wall of the carbonized cylinder. Several grinding components are provided, and each grinding component is spaced apart along the left and right direction of the rod. Several grinding blocks are provided on each grinding component, and grinding grooves are formed between two adjacent grinding blocks. Each grinding block and grinding groove constitutes the above-mentioned concave and convex structure, and the outer surface of each grinding block is the above-mentioned peeling surface.

[0016] The grinding component is an upright plate. The left or right side of the plate is the peeling surface. The peeling surface is recessed with a plurality of first grinding grooves that run through the front and back direction and are spaced apart in the vertical direction, and a plurality of second grinding grooves that run through the vertical direction and are spaced apart in the front and back direction. The vertical spacing direction of the first grinding grooves is perpendicular to the extension direction of the rod. Each first grinding groove and each second grinding groove is perpendicularly arranged, and a plurality of grinding blocks arranged in a matrix are formed between each first grinding groove and each second grinding groove. Each first grinding groove and each second grinding groove constitutes the grinding groove.

[0017] Of the two carbonization cylinders, the one located below the first discharge hopper is the fine carbonization cylinder. The input end of the fine carbonization cylinder is connected to a slurry injection mechanism, which has a slurry pump. The input end of the slurry pump is connected to a placement tank containing waste concrete slurry, and the output end of the slurry pump is connected to the input end of the fine carbonization cylinder.

[0018] This novel integrated carbon mineralization equipment for surface-strengthening micro-powdered low-carbon recycled aggregate involves crushing recycled concrete aggregate into particles with a diameter ranging from 5mm to 31.5mm and feeding it into the hopper. Particles larger than 31.5mm enter the carbonization cylinder through the discharge regulating structure. The rotating rod drives the spiral blades to mix the recycled concrete aggregate and convey it towards the output of the carbonization cylinder. Simultaneously, a vibration device vibrates the carbonization cylinder, causing relative friction and collision between the recycled concrete aggregate particles, thus stripping away the mortar from the surface and transforming the aggregate into mortar powder. Under the action of the device, mortar powder is vibrated and fed into a filter screen for sieving. Mortar powder with a particle size smaller than the diameter of the filter screen holes falls from the first discharge port into the carbonation cylinder two below the first discharge port. Mortar powder with a particle size larger than the diameter of the filter screen holes is vibrated and fed into the second discharge port and falls into another carbonation cylinder two below the second discharge port. At the same time, atomized carbonation reaction solution and carbon dioxide gas are introduced into both carbonation cylinder two and stirred by a stirring rod. The carbonation reaction solution, carbon dioxide gas and mortar powder react to form a calcium carbonate layer, realizing the carbonation of recycled concrete aggregate, which significantly improves the properties of the carbonated concrete aggregate. The carbonated recycled concrete aggregate is finally output from the carbonation cylinder two. Compared with the existing technology, the recycled concrete aggregate is separated into mortar powder, which allows water and carbon dioxide gas to react better with the recycled concrete aggregate, resulting in better carbonation effect and improved performance of recycled concrete aggregate. Simultaneously, during the transportation process, the recycled concrete aggregate vibrates and moves relative to each other, colliding and rubbing against the grinding parts, thereby better stripping the mortar powder and enhancing the stripping effect of the recycled concrete aggregate mortar powder. This effectively strips the mortar powder, which is beneficial to improving the penetration efficiency of water and carbon dioxide. This also allows the mortar powder to carbonize rapidly and simultaneously, achieving deep carbonization within a few hours. The fast carbonization speed improves the performance of the recycled concrete aggregate. Furthermore, the carbonized recycled concrete aggregate can be used as a cement raw material, fully realizing resource utilization and achieving low-carbon, energy-saving, and emission-reduction goals. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this novel invention.

[0020] Figure 2 This is a schematic diagram of the structure of the novel carbonized cylinder.

[0021] Figure 3 This is a schematic diagram of the side structure of this novel invention.

[0022] Figure 4 This is a schematic diagram of another aspect of the structure of this novel invention.

[0023] Figure 5 This is a schematic diagram of the installation structure of the new type of rubber vibration damping block.

[0024] Figure 6 This is a schematic diagram of the structure of the new grinding part. Detailed Implementation

[0025] To further explain the technical solution of this invention, a detailed description is provided below in conjunction with the accompanying drawings.

[0026] A low-carbon recycled aggregate surface-strengthening micro-powder carbon mineralization integrated equipment, such as... Figures 1-6 As shown, the device includes a frame 1 and a mixing cylinder 2 mounted on the frame 1. A stirring mechanism is rotatably installed inside the mixing cylinder 2. The mixing cylinder 2 has a liquid inlet, a gas inlet, a feed inlet, and a discharge outlet. The mixing cylinder 2 has a carbonization cylinder 1 21 and a carbonization cylinder 22. The top surface of one axial end of the carbonization cylinder 1 21 has a hopper 211, and the top surface of the carbonization cylinder 1 21 has the aforementioned feed inlet connected to the hopper 211. The hopper is equipped with... A discharge adjustment structure is provided to adjust the flow of aggregates of different particle sizes from the hopper 211 to the carbonization cylinder 21. The hopper 211 is located above the top left end of the carbonization cylinder 21, and is connected to the inlet via the aforementioned discharge adjustment structure. Specifically, the carbonization cylinder 21 is horizontally arranged in the left-right direction, and a bar valve 3 for adjusting the output port diameter of the hopper 211 is provided at the output end of the hopper 211. The specific structure of the bar valve and... The method of adjusting the flow of aggregates of different particle sizes from the hopper into the carbonization cylinder is well known to those skilled in the art and will not be elaborated here. The feed inlet is located on the top left end of the carbonization cylinder 21. The output end of the hopper 211 is connected to the feed inlet of the carbonization cylinder 21 through a bar valve 3. The input end of the bar valve 3 is connected to the output end of the hopper 211, and the output end of the bar valve 3 is connected to the feed inlet. In application, recycled concrete aggregates crushed into particle sizes of 5mm-31.5mm enter from the input end of the hopper 211. The spacing of the output ends of the bar valves is adjusted to about 31.5mm. Recycled concrete aggregates larger than 31.5mm cannot fall into the carbonization cylinder 21. The bar valves can prevent aggregates with particle sizes larger than the spacing from falling. Recycled concrete aggregates with particle sizes less than or equal to 31.5mm pass through the bar valves and the feed inlet and enter the carbonization cylinder 21.

[0027] The bottom surface of the carbonization cylinder 21 at the other end of the axial direction has a first discharge port and a second discharge port arranged horizontally at intervals. The first discharge port is located between the inlet and the second discharge port. A filter screen 4 is provided within the range of the first discharge port. The carbonization cylinder 21 is horizontally mounted on the frame 1 by a vibrating device that drives the carbonization cylinder 21 to vibrate. Specifically, the vibrating device is a vibrating motor 212, which is mounted on the left end of the bottom surface of the carbonization cylinder 21. The frame 1 has several uprights arranged on the front and rear sides of the carbonization cylinder 21. Preferably, the uprights 4 are equipped with... Four connecting rods 11 are horizontally arranged on the outer wall of the carbonized cylinder 21 above the four uprights, and a connecting crossbar 111 connects the lower ends of each pair of connecting rods. The upper end of the upright is connected to the end of the connecting rod 11 through a vibration damping mechanism, namely, the vibration damping mechanism is a vertically arranged rubber vibration damping block 5. There are two rubber vibration damping blocks 5, which are arranged horizontally at intervals. The bottom surfaces of the two rubber vibration damping blocks 5 are connected to a lower connecting plate 51. The lower connecting plate 51 is locked together with the top surface of the upright. That is, the top surface of the upright is recessed at the position outside the rubber vibration damping block 5. A locking groove is formed, and the lower connecting plate 51 has a locking hole that runs vertically through the groove. The lower connecting plate 51 is locked to the upright by connecting bolts through the locking hole and the locking groove. The top surfaces of the two rubber damping blocks 5 are connected to the upper connecting plate 52. The top surface of the upper connecting plate 52 has a protruding lower protrusion 521, and the top surface of the lower protrusion 521 has a recessed lower groove. The top surface of the lower protrusion 521 is locked with an upper protrusion 5211. The locking method between the upper protrusion 5211 and the lower protrusion 521 is similar to the way the lower connecting plate 51 is locked to the upright. The bottom surface of the upper protrusion 5211 corresponds to... An upper groove is recessed at the lower groove position, and the upper and lower grooves form an embedding groove for the connecting rod 11 to be embedded in; the first discharge port and the second discharge port are both located on the bottom right end of the carbonization cylinder 21, and the first discharge port is located to the upper left of the second discharge port. A first discharge hopper 213 is connected below the first discharge port, and a second discharge hopper 214 is connected below the second discharge port. The filter screen 4 is installed in the upper end of the first discharge hopper 213. The specific structure of the filter screen 4 and the way the filter screen 4 is installed in the upper end of the first discharge hopper 213 are technologies known to those skilled in the art.In application, the carbonization cylinder 21 is mounted on the frame 1 via the connecting rod 11. As needed, a filter screen capable of screening out recycled concrete aggregate of the corresponding particle size is installed in the first discharge port. Under the action of the vibrating motor, the vibrating motor can disperse the recycled concrete aggregate, and then the recycled concrete aggregate is vibrated and output to the right from the carbonization cylinder 21. The recycled concrete aggregate falls into the range of the filter screen. The recycled concrete aggregate with a particle size smaller than the diameter of the filter screen hole falls from the screen hole of the filter screen and falls into the first discharge hopper 213 from the first discharge port. The recycled concrete aggregate with a particle size larger than the diameter of the filter screen hole continues to vibrate and output to the right from the carbonization cylinder 21 and falls into the second discharge hopper 214 from the second discharge port. For example, if the diameter of the mesh openings of the filter screen is 5mm-10mm, the vibrating motor can disperse the recycled concrete aggregate. The recycled concrete aggregate is then vibrated and output to the right from the carbonization cylinder 21. The first discharge hopper 213 can then output finer recycled concrete aggregate with a particle size of 5mm-10mm, while the coarser recycled concrete aggregate with a particle size of 10mm-31.5mm is output from the second discharge hopper 214. Furthermore, the rubber vibration damping blocks 5 can slow down the vibration of the carbonization cylinder 21, allowing the recycled concrete aggregate to slowly enter the filter screen 4 for screening, preventing material blockage and resulting in better screening. Simultaneously, driving the carbonization cylinder 21 to vibrate at a certain frequency also achieves relative motion friction between the recycled concrete aggregates, further enhancing the peeling effect.

[0028] Below the carbonization cylinder 21, corresponding to the first and second discharge ports, two carbonization cylinders 2 are erected vertically. The upper ends of the two carbonization cylinders 2 are connected to the first and second discharge ports respectively via connecting hoppers that have buffers for feeding and seal the input end after feeding. The top surfaces of the two carbonization cylinders 2 are respectively provided with the aforementioned liquid inlet and gas inlet. Specifically, the two carbonization cylinders 22 are divided into a fine carbonization cylinder 22a and a coarse carbonization cylinder 22b. The two connecting hoppers are correspondingly divided into a first connecting hopper 61 and a second connecting hopper 62. The first discharge hopper 213 is connected to the fine carbonization cylinder 22a via the first connecting hopper 61, and the second discharge hopper 214 is connected to the coarse carbonization cylinder 22b via the second connecting hopper 62. 22b is connected and coordinated. The connecting hopper is a counterweight valve, which consists of several layers of counterweight valves. In this embodiment, the several layers of counterweight valves are three layers of counterweight valves. The input ends of the two counterweight valves are respectively connected to the output ends of the first discharge hopper 213 and the second discharge hopper 214. The output ends of the two counterweight valves are respectively connected to the input ends of the fine carbonization cylinder 22a and the coarse carbonization cylinder 22b. That is, the top surfaces of the fine carbonization cylinder 22a and the coarse carbonization cylinder 22b are each provided with an inlet for recycled concrete aggregate to enter. The inlet is the input end of the carbonization cylinder 2. The two inlets are respectively connected below the two connecting hoppers, and the outer walls of the output ends of the two connecting hoppers are respectively in close contact with the inner walls of the two inlets. This allows the output ends of the two connecting hoppers to respectively The input ends of the fine carbonization cylinder and the coarse carbonization cylinder are sealed together to prevent carbon dioxide gas leakage. The specific structure and operation of the counterweight valve are known to those skilled in the art. A vertically installed lower spray pipe 221 that passes through the liquid filling port into the carbonization cylinder is sealed on the top surface of the carbonization cylinder. The feed port is located between the lower spray pipe 221 and the lower air jet pipe 222. The outer walls of the lower spray pipe 221 and the lower air jet pipe 222 are sealed together with the carbonization cylinder. That is, the inner wall of the liquid filling port is provided with internal threads, the lower spray pipe 221 is screwed into the liquid filling port, and the outer wall of the lower spray pipe 221 is fitted with a sealing gasket that seals with the inner wall of the liquid filling port. A vertically installed lower spray pipe 221 that passes through the gas filling port is sealed on the top surface of the carbonization cylinder. The lower jet pipe 222 is sealed in a manner similar to that of the lower spray pipe 221. The lower jet pipe 222 is connected to a gas supply device that can introduce carbon dioxide gas into the carbonization cylinder 21. The lower spray pipe 221 is connected to a spraying device that can spray the carbonization reaction solution in a mist. Taking water as an example, the way the spraying device sprays water into the carbonization cylinder 21 in a mist state through the lower spray pipe 221, the way the gas supply device introduces carbon dioxide gas into the carbonization cylinder 21 through the lower jet pipe 222, and the sealing and fitting method between the lower spray pipe 221 and the lower jet pipe 222 and the carbonization cylinder 21 are all technologies known to those skilled in the art and will not be described in detail here.During application, recycled concrete aggregate with a particle size smaller than the diameter of the filter screen 4 falls from the first discharge hopper 213, passes through the first connecting hopper 61, and enters the fine carbonization cylinder 22a. Recycled concrete aggregate with a particle size larger than the diameter of the filter screen falls from the second discharge hopper 214, passes through the second connecting hopper 62, and enters the coarse carbonization cylinder 22b. At the same time, the lower spray pipe 221 and the lower air jet pipe 222 on the fine carbonization cylinder 22a and the coarse carbonization cylinder 22b start working. The lower spray pipe 221 sprays water in an atomized state, and the lower air jet pipe 222 sprays carbon dioxide gas into the carbonization cylinder 2. The water and carbon dioxide gas mix and react with the recycled concrete aggregate, so that the recycled concrete aggregate is carbonized. Furthermore, when recycled concrete aggregate passes through the counterweight valve, the counterweight valve opens under the weight of the recycled concrete aggregate. When no recycled concrete aggregate passes through, the counterweight valve quickly seals and closes. After the recycled concrete aggregate is fed, the input end of the carbonization cylinder can quickly seal and cooperate, making it difficult for carbon dioxide gas to leak out from the carbonization cylinder, thus ensuring the concentration of carbon dioxide gas. This is beneficial for the recycled concrete aggregate to react with water and carbon dioxide inside the carbonization cylinder.

[0029] Both carbonization cylinders have a vertically mounted and rotatably installed stirring rod 223 inside. The lower end of each carbonization cylinder has a discharge port that can be controlled to seal or open. The two discharge ports constitute the discharge port. The stirring rod 223 is vertically positioned inside the carbonization cylinder. Specifically, the discharge port of each carbonization cylinder has a control mechanism to control the release or shut-off of aggregate within the carbonization cylinder. That is, the discharge port of each carbonization cylinder is equipped with a discharge valve 224 that controls the opening or sealing of the output end of the carbonization cylinder. This discharge valve 224 is the aforementioned control mechanism. The discharge valve is sealed to the output end of the carbonization cylinder. The specific structure, sealing connection method, and working method of the discharge valve 224 are known to those skilled in the art. The sealing connection method and sealing... The sealing and assembly methods are all well-known technologies and will not be elaborated upon here. The stirring rod 223 has a rotating rod vertically and rotatably installed inside the carbonization cylinder two, and rotating blades on the outer wall of the rotating rod. The upper end of the rotating rod extends beyond the top surface of the carbonization cylinder two, and the upper end of the rotating rod is offset from the feed port, air inlet, and liquid inlet. A driven gear is fitted on the upper end of the rotating rod. A rotating motor is provided outside the carbonization cylinder two. The rotating motor is vertically installed, and a driving gear meshing with the driven gear is fitted on the output end of the rotating motor. The rotation of the output end of the rotating motor drives the driving gear and the driven gear to rotate, thereby driving the stirring rod 223 to rotate. The way the stirring rod 223 rotates inside the carbonization cylinder two is well-known technology to those skilled in the art and will not be elaborated upon here. In application, the rotating motor drives the rotating rod to rotate, and the rotating blades rotate with the rotating rod, thereby stirring and mixing the recycled concrete aggregate, water, and carbon dioxide gas entering the carbonization cylinder two, thus realizing the carbonization of the recycled concrete aggregate. Furthermore, the discharge valve can control the carbonation cylinder to be in a sealed state, thereby allowing water, carbon dioxide gas, and recycled concrete aggregate to react, or it can control the carbonation cylinder to be in an open state, facilitating the output of the carbonized recycled concrete aggregate.

[0030] The carbonization cylinder 21 is provided with a spiral rod 7 rotatably installed inside the carbonization cylinder 21 and extending along the axial direction of the carbonization cylinder 21. The spiral rod 7 has a rod body 71 and spiral blades 72 extending along the length direction of the rod body 71. Specifically, there is a material space 100 between the outer wall of the spiral blades 72 and the inner wall of the carbonization cylinder 21. The rod body 71 is rotatably and horizontally arranged inside the carbonization cylinder 21 in the left and right directions, and both ends of the rod body 71 horizontally extend out of the left and right sides of the carbonization cylinder 21. The frame 1 is equipped with a device located inside the carbonization cylinder 21. The drive motor on the left side is horizontally positioned with its output end facing right and connected to the left end of the rod 71. In application, the output end of the drive motor rotates, causing the rod 71 to rotate, which in turn drives the spiral blades 72 to rotate. Recycled concrete aggregate enters the carbonization cylinder 21 from the feed port. The spiral blades 72 rotate, causing the recycled concrete aggregate to move to the right. At the same time, the material space 100 allows the recycled concrete aggregate to collide with the carbonization cylinder 21, increasing the stripping effect on the recycled concrete aggregate.

[0031] A grinding element 8 is vertically mounted on the outer wall of the rod 71. The surface of the grinding element 8 has a peeling surface 81 with a concave-convex structure. The spiral rod 7, the grinding element 8, and the stirring rod 223 constitute the stirring mechanism. Specifically, there are several grinding elements 8, which are spaced apart along the left and right direction of the rod 71. Adjacent grinding elements 8 are separated by spiral blades 72. That is, a spiral groove extending spirally in the left and right direction and open on the outside is formed between the spiral blades 72 and the rod 71. The grinding elements 8 are spaced apart along the spiral direction of the spiral groove. Adjacent grinding elements 8 are respectively erected above or below the rod 71. The grinding element 8 has several grinding blocks 82. A grinding groove is formed between adjacent grinding blocks 82. Each grinding block 82 and the grinding groove constitute the above-mentioned concave-convex structure. The convex structure has the outer surface of each grinding block 82 as the peeling surface 81. Preferably, the grinding component 8 is a vertically arranged plate, and the left or right side of the plate is the peeling surface 81. Taking the right side as the peeling surface 81 as an example, the peeling surface 81 is recessed with a plurality of first grinding grooves that run through the front-back direction and are spaced apart in the up-down direction, and a plurality of second grinding grooves that run through the up-down direction and are spaced apart in the front-back direction. The up-down spacing direction of the first grinding grooves is perpendicular to the extension direction of the rod 71. Each first grinding groove and each second grinding groove are arranged perpendicularly to each other, and a plurality of grinding blocks 82 arranged in a matrix are formed between each first grinding groove and each second grinding groove. Each first grinding groove and each second grinding groove constitutes the grinding groove. Both the first grinding groove and the second grinding groove are V-shaped grooves. In application, the carbonization cylinder 21 vibrates the recycled concrete aggregate through a vibration device. The relative motion and friction between the recycled concrete aggregate and the grinding piece 8 facilitates the removal of mortar from the surface of the recycled concrete aggregate, enhancing the mortar removal effect and turning the recycled concrete aggregate into mortar powder. The mortar powder can effectively react with water and carbon dioxide gas, resulting in higher water and carbon dioxide penetration efficiency and improving the performance of the recycled concrete aggregate. Furthermore, because the grinding groove is V-shaped, the peeling surface 81 forms a serrated shape, further enhancing the effect of removing mortar powder from the recycled concrete aggregate.

[0032] This novel low-carbon recycled aggregate surface-strengthening micro-powder carbon mineralization integrated equipment involves crushing recycled concrete aggregate into particles with a diameter ranging from 5mm to 31.5mm and feeding it into the inlet of the hopper 211. Particles smaller than or equal to 31.5mm fall from the bar valve into the carbonization cylinder 21. The rotating rod 71 drives the spiral blades 72 to rotate, mixing and conveying the recycled concrete aggregate to the right. Simultaneously, a vibrating motor vibrates the carbonization cylinder 21, causing relative friction between the recycled concrete aggregate particles and collisions with the grinding components 8, thereby stripping mortar powder from the surface of the recycled concrete aggregate. The spiral blades continue to convey the recycled concrete aggregate to the right. During this process, the recycled concrete aggregate continuously passes through the grinding components 8, stripping away mortar powder and ensuring complete removal of mortar powder from the recycled concrete aggregate. The mortar is converted into mortar powder and conveyed to the right. Simultaneously, under the action of the vibrating motor, the mortar powder vibrates from the carbonation cylinder 1 21 to the right and is fed into the filter screen 4 for screening. Mortar powder with a particle size smaller than the diameter of the filter screen holes falls from the first discharge hopper 213 into the fine carbonation cylinder 22a. Then, the three-layer counterweight valve is sealed and closed. Mortar powder with a particle size larger than the diameter of the filter screen holes vibrates and is fed into the second discharge hopper 214 and falls into the coarse carbonation cylinder 22b. The three-layer counterweight valve is sealed and closed. At the same time, atomized water and carbon dioxide gas are introduced into both carbonation cylinders 2 and stirred by the stirring rod. The water, carbon dioxide gas and mortar powder mix and react to form a calcium carbonate layer, realizing the carbonation of recycled concrete aggregate. This significantly improves the characteristics of the carbonated recycled concrete aggregate. After carbonation, the discharge valve is opened, allowing the carbonated recycled concrete aggregate to be output from the carbonation cylinder 2. Compared to existing technologies, the stripping of recycled concrete aggregate into mortar powder allows for better reaction between water, carbon dioxide gas, and the recycled concrete aggregate, resulting in a better carbonation effect and improved performance. The vibration and relative motion friction of the recycled concrete aggregate, along with collisions and friction with the grinding parts 8, further enhances the stripping of the mortar powder, effectively removing it from the surface of the recycled concrete aggregate. During the reaction, the powdered state of the recycled concrete aggregate improves the penetration efficiency of water and carbon dioxide, enabling simultaneous and rapid carbonization of the mortar powder. Deep carbonization can be achieved within hours, resulting in a fast carbonization rate and improved performance. Furthermore, the carbonized recycled concrete aggregate can be used as a cement raw material, fully utilizing resources and achieving low-carbon, energy-saving, and emission-reduction goals. Moreover, the material enters the two carbonization cylinders in a sealed environment, allowing for the simultaneous injection of carbon dioxide gas and the carbonization reaction solution, preventing carbon dioxide leakage and ensuring the concentration of carbon dioxide throughout the device, thus guaranteeing the carbonization reaction effect.

[0033] In this novel invention, preferably, the input end of the fine carbonization cylinder 22a is connected to a slurry injection mechanism, which includes a slurry pump 9. The input end of the slurry pump 9 is connected to a placement tank containing waste concrete slurry, and the output end of the slurry pump 9 is connected to the input end of the fine carbonization cylinder 22a. Specifically, a conveying pipe is sealed between the output end of the first connecting hopper 61 and the inlet of the fine carbonization cylinder 22a. The conveying pipe is vertically arranged, and the upper outer wall of the conveying pipe is sealed to the output end of the first connecting hopper 61, while the lower outer wall of the conveying pipe is sealed to the fine carbonization cylinder. The inner wall of the feed inlet 22a is sealed, and the outer wall of the conveying pipe is connected to a branch injection pipe. The output end of the mud pump 9 is sealed and connected to the branch injection pipe. The specific structure and working principle of the mud pump 9 are well known to those skilled in the art and will not be described in detail here. In application, the waste concrete mud is added into the fine carbonization cylinder 22a through the mud pump 9, so that the waste concrete mud can be carbonized and reused together with the recycled concrete aggregate after secondary carbonization. This allows the waste concrete mud to be reused, improves resource utilization, and further realizes low carbon, energy saving and environmental protection.

[0034] The product form of this invention is not limited to the illustrations and embodiments in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of this invention.

Claims

1. A low-carbon recycled aggregate surface-strengthening micro-powder carbon mineralization integrated equipment, comprising a frame and a mixing cylinder mounted on the frame, wherein a stirring mechanism is rotatably installed inside the mixing cylinder, and the mixing cylinder has a liquid inlet, a gas inlet, a feed inlet, and a discharge outlet, characterized in that: The mixing cylinder comprises a carbonization cylinder one and a carbonization cylinder two. Carbonization cylinder one is horizontally mounted on a frame via a vibrating device that drives it to vibrate. The top surface of one axial end of carbonization cylinder one has a hopper, and the top surface of carbonization cylinder one has an inlet connected to the hopper. The output end of the hopper has a discharge adjustment structure that can adjust the flow of aggregates of different particle sizes into carbonization cylinder one. The bottom surface of the other axial end of carbonization cylinder one has a first discharge port and a second discharge port arranged horizontally at intervals. The first discharge port is located between the inlet and the second discharge port. A filter screen is provided within the material inlet area. The carbonization cylinder 2 is erected vertically below the carbonization cylinder 1, corresponding to the first and second discharge ports. The upper ends of the two carbonization cylinder 2 are respectively connected to the first and second discharge ports one-to-one through a connecting hopper with a buffer for feeding and sealing the input end of the carbonization cylinder 2 after feeding. The carbonization cylinder 2 has a vertically installed and rotatably mounted stirring rod. The lower ends of the two carbonization cylinder 2 have a feeding port that can be controlled to be sealed or opened. The two feeding ports constitute the discharge port. The top surfaces of the two carbonization cylinder 2 are respectively provided with the above-mentioned gas filling port and liquid filling port. A helical rod is rotatably installed inside the carbonization cylinder and extends along the axial direction of the carbonization cylinder. The helical rod has a rod body and helical blades extending along the length direction of the rod body. An abrasive is vertically installed on the outer wall of the rod body. The surface of the abrasive has a peeling surface with a concave-convex structure. The helical rod, the abrasive, and the stirring rod constitute the stirring mechanism.

2. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 1, characterized in that: With the axial direction of carbonization cylinder one as the left-right direction, the vibration device is installed on the bottom surface of carbonization cylinder one. The hopper is located above the left end of the top surface of carbonization cylinder one, and the inlet is located on the left end of the top surface of carbonization cylinder one. The hopper is connected to the inlet through the above-mentioned discharge adjustment structure. The first discharge port and the second discharge port are both located on the bottom surface of the right end of carbonization cylinder one, and the first discharge port is located to the left of the second discharge port. The first discharge port is supported by the first discharge hopper below, and the second discharge port is supported by the second discharge hopper below. The filter screen is installed in the upper end of the first discharge hopper, and the first discharge hopper and the second discharge hopper are respectively connected to the two carbonization cylinders two through the connecting hopper. The lower end of the carbonization cylinder two has a control mechanism to control the release or cut-off of aggregate in the carbonization cylinder two. The rod is horizontally arranged in the carbonization cylinder one along the left-right direction.

3. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregates according to claim 2, characterized in that: The vibration device is a vibration motor, which is installed on the left end of the bottom surface of the carbonization cylinder. The frame has several uprights set on the front and rear sides of the carbonization cylinder. A connecting rod is set horizontally on the outer side wall of the carbonization cylinder above the uprights. The upper end of the uprights is connected to the end of the connecting rod through a vibration damping mechanism.

4. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 3, characterized in that: The vibration damping mechanism consists of two vertically arranged vibration damping rubbers, which are horizontally spaced apart. The bottom surfaces of the two vibration damping rubbers are connected to a lower connecting plate, which is locked to the top surface of the upright. The top surfaces of the two vibration damping rubbers are connected to an upper connecting plate. The top surface of the upper connecting plate has a protruding lower protrusion, and the top surface of the lower protrusion has a recessed lower groove. The top surface of the lower protrusion is locked with an upper protrusion, and the bottom surface of the upper protrusion has a recessed upper groove corresponding to the position of the lower groove. The upper groove and the lower groove form an insert groove for the connecting rod to be embedded.

5. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 2, characterized in that: The output end of the hopper is equipped with a bar valve, and the output end of the hopper is connected to the feed inlet of the carbonization cylinder through the bar valve. The bar valve is the aforementioned discharge adjustment structure.

6. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 2, characterized in that: The connecting hopper is a counterweight valve. The input ends of the two counterweight valves are respectively connected to the output ends of the first discharge hopper and the second discharge hopper, and the output ends of the two counterweight valves are respectively connected to the input ends of the two carbonized cylinders.

7. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 2, characterized in that: The stirring rod is vertically positioned inside the carbonization cylinder. The output end of the carbonization cylinder is equipped with a discharge valve that controls the opening or sealing of the output end of the carbonization cylinder. This discharge valve is the aforementioned control mechanism.

8. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 2, characterized in that: There is a material space between the outer wall of the spiral blade and the inner wall of the carbonized cylinder. Several grinding components are provided, and each grinding component is spaced apart along the left and right direction of the rod. Several grinding blocks are provided on each grinding component, and grinding grooves are formed between two adjacent grinding blocks. Each grinding block and grinding groove constitutes the above-mentioned concave and convex structure, and the outer surface of each grinding block is the above-mentioned peeling surface.

9. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 8, characterized in that: The grinding component is an upright plate. The left or right side of the plate is the peeling surface. The peeling surface is recessed with a plurality of first grinding grooves that run through the front and back direction and are spaced apart in the vertical direction, and a plurality of second grinding grooves that run through the vertical direction and are spaced apart in the front and back direction. The vertical spacing direction of the first grinding grooves is perpendicular to the extension direction of the rod. Each first grinding groove and each second grinding groove is perpendicularly arranged, and a plurality of grinding blocks arranged in a matrix are formed between each first grinding groove and each second grinding groove. Each first grinding groove and each second grinding groove constitutes the grinding groove.

10. The integrated equipment for surface strengthening and carbon mineralization of low-carbon recycled aggregate according to claim 2, characterized in that: Of the two carbonization cylinders, the one located below the first discharge hopper is the fine carbonization cylinder. The input end of the fine carbonization cylinder is connected to a slurry injection mechanism, which has a slurry pump. The input end of the slurry pump is connected to a placement tank containing waste concrete slurry, and the output end of the slurry pump is connected to the input end of the fine carbonization cylinder.

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