Carbonized recycled aggregate preparation device

Abstract

The utility model relates to a carbonized recycled aggregate preparation device which comprises a carbon dioxide gas cylinder, a first container for preparing a calcium bicarbonate solution and a second container for carbonizing recycled aggregate which are communicated in sequence, the first container and the second container are respectively provided with a first temperature controller and a second temperature controller which are used for controlling the temperature, the preparation of the calcium bicarbonate solution and the carbonization of the recycled aggregate are arranged in two different containers, and the temperature controller is arranged in each container; according to the present invention, the temperature suitable for each reaction can be adjusted during the generation of the calcium bicarbonate solution and the carbonization of the recycled aggregate, such that the preparation of the calcium bicarbonate solution can be adjusted to the low temperature so as to ensure the concentration of the calcium bicarbonate solution, and then the high-concentration calcium bicarbonate solution is introduced into the second container, and after the temperature is adjusted to a proper temperature through the second temperature controller, the recycled aggregate is carbonized, so that the carbonization effect of the recycled aggregate is improved.

Description

Technical Field

[0001] This utility model belongs to the field of carbonization technology of recycled aggregate, and specifically relates to a carbonized recycled aggregate preparation device. Background Technology

[0002] Recycled aggregate is produced from waste concrete through mechanical crushing, washing, and screening. The large-scale stockpiling of recycled aggregate leads to severe resource waste. Carbonated recycled aggregate offers a new solution to the problems of natural aggregate shortage and solid waste environmental pollution. Through specific carbonation processes, such as mixing recycled aggregate with a calcium-rich solution and conducting a carbonation reaction under certain carbon dioxide concentrations and pressures, a calcium carbonate deposition layer can form on and inside the recycled aggregate particles. This fills microcracks and increases the hardness of the aggregate particles, thereby significantly improving the mechanical properties and durability of the recycled aggregate.

[0003] The inventors have disclosed a wet carbonization apparatus comprising: a base mounted on a support; a magnetic stirrer mounted on the base and connected to a beaker containing a matrix solution; a rotor and a gas disperser within the matrix solution; the gas disperser connected to a carbon dioxide cylinder via a conduit; a metal filter screen mounted on the support; and recycled aggregate placed within the metal filter screen, which is positioned within the matrix solution. This apparatus combines the preparation of calcium bicarbonate solution with carbonization within a single container. However, the preparation of the calcium bicarbonate solution requires maintaining a low temperature, while the carbonization of the recycled aggregate requires a specific temperature. The inability to maintain stable and accurate temperature control inevitably reduces the concentration of the calcium bicarbonate solution, thereby diminishing the carbonization effect of the recycled aggregate.

[0004] Therefore, in order to address the above-mentioned technical problems, designing a carbonized recycled aggregate preparation device to separately control the temperature during the preparation of calcium bicarbonate solution and the carbonation of recycled aggregate, thereby ensuring the concentration of carbonic acid and improving the carbonation effect of recycled aggregate, is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a carbonized recycled aggregate preparation device. After preparing a calcium bicarbonate solution at a low temperature, the solution is then introduced into the recycled aggregate to carbonize it, ensuring the concentration of carbonic acid and thereby improving the carbonation effect of the recycled aggregate.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A carbonized recycled aggregate preparation apparatus includes a carbon dioxide gas cylinder, a first container for preparing calcium bicarbonate solution, and a second container for carbonizing recycled aggregate, which are connected in sequence. The first container and the second container are respectively equipped with a first temperature controller and a second temperature controller for controlling the temperature.

[0008] Preferably, both the first container and the second container are provided with a stirring device, the stirring device including a drive motor disposed at the top of the first container, and a stirring rod connected to the drive motor and extending into the first container.

[0009] Preferably, the first container is provided with a carbon dioxide inlet, a deionized water inlet and a first recycled aggregate inlet, and the second container is provided with a second recycled aggregate inlet.

[0010] Preferably, a gas flow meter is installed on the connecting pipe between the carbon dioxide cylinder and the carbon dioxide inlet.

[0011] Preferably, the carbon dioxide inlet is provided with a delivery pipe extending into the first container, and the end of the delivery pipe is provided with a gas disperser for dispersing carbon dioxide gas.

[0012] Preferably, the first container and the second container are connected via a magnetic pump.

[0013] Preferably, a filter is provided between the magnetic pump and the first container.

[0014] Preferably, a pH meter extending into the interior of the second container is provided on the side of the second container.

[0015] Preferably, the second container is provided with a filter screen for placing recycled aggregate.

[0016] Preferably, a level gauge is installed inside the first container.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] By setting the preparation of calcium bicarbonate solution and the carbonization of recycled aggregate in two different containers, and installing a temperature controller in each container, the temperatures for each reaction during the formation of calcium bicarbonate solution and the carbonization of recycled aggregate can be adjusted to suitable levels. Specifically, the preparation of calcium bicarbonate solution is adjusted to a lower temperature to ensure the concentration of calcium bicarbonate solution. Then, a calcium bicarbonate solution with a higher concentration is introduced into the second container, and after being adjusted to a suitable temperature by the second temperature controller, the recycled aggregate is carbonized, thereby improving the carbonization effect of the recycled aggregate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Appendix Figure 1 This is a schematic diagram of the overall structure of the carbonized recycled aggregate preparation device disclosed in the embodiment of this utility model;

[0021] Appendix Figure 2 This is a schematic flowchart of the carbonized recycled aggregate preparation device disclosed in the embodiments of this utility model;

[0022] The components include: 1. Carbon dioxide cylinder; 2. First container; 3. Stirring device; 4. First temperature controller; 5. Filter; 6. Magnetic pump; 7. Second container; 8. pH meter; 9. Second temperature controller; 10. Calcium bicarbonate solution; 11. Gas disperser; 12. Filter screen; and 13. Gas flow meter. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this invention is to provide a carbonized recycled aggregate preparation device that can control the temperature during the preparation of calcium bicarbonate solution and the carbonation of recycled aggregate to ensure the concentration of carbonic acid and thus improve the carbonation effect of recycled aggregate.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] refer to Figure 1The carbonized recycled aggregate preparation apparatus disclosed in this embodiment of the present invention includes at least a carbon dioxide cylinder 1, a first container 2 for preparing calcium bicarbonate solution 10, and a second container 7 for carbonizing recycled aggregate, which are connected in sequence. The first container 2 and the second container 7 are respectively equipped with a first temperature controller 4 and a second temperature controller 9 for controlling the temperature. By setting the preparation of calcium bicarbonate solution 10 and the carbonization of recycled aggregate in two different containers, and setting a temperature controller in each container, the generation of calcium bicarbonate solution 10 and the carbonization of recycled aggregate can be adjusted to the appropriate temperature for each reaction. That is, the preparation of calcium bicarbonate solution 10 is adjusted to a lower temperature to ensure the concentration of calcium bicarbonate solution 10. Then, a calcium bicarbonate solution 10 with a higher concentration is introduced into the second container 7. After the second temperature controller 9 adjusts the temperature to a suitable level, the recycled aggregate is carbonized, thereby improving the carbonization effect of recycled aggregate.

[0027] It should be noted that since the temperature probes of the first temperature controller 4 and the second temperature controller 9 are electrical components, an insulating layer is wrapped around the outside of the first container 2 and the second container 7 to prevent leakage and potential danger. At the same time, the first container 2 and the second container 7 must be grounded. The first temperature controller 4 and the second temperature controller 9 can control the temperature inside the first container 2 and the second container 7, and can also monitor the temperature inside the first container 2 and the second container 7.

[0028] refer to Figure 1 In one embodiment, both the first container 2 and the second container 7 are equipped with a stirring device 3. The stirring device 3 includes a drive motor located at the top of the first container 2 and a stirring rod connected to the drive motor and extending into the first container 2. By setting the stirring device 3, the materials in the first container 2 and the second container 7 can be fully mixed, thereby improving the generation efficiency of calcium bicarbonate solution 10 and the carbonation efficiency of recycled aggregate.

[0029] refer to Figure 1 In one implementation, the first container 2 is provided with a carbon dioxide inlet, a deionized water inlet and a first recycled aggregate inlet, and the second container 7 is provided with a second recycled aggregate inlet. In the first container 2, by providing the carbon dioxide inlet, the deionized water inlet and the first recycled aggregate inlet, the reaction of carbon dioxide, deionized water and recycled aggregate generates a calcium bicarbonate solution 10. Then the generated calcium bicarbonate solution 10 reacts with the recycled aggregate entering through the second recycled aggregate inlet, causing the recycled aggregate to carbonize.

[0030] refer to Figure 1 As one implementation method, a gas flow meter 13 is installed on the connecting pipe between the carbon dioxide cylinder 1 and the carbon dioxide inlet, and the flow rate of carbon dioxide gas can be controlled by the gas flow meter 13.

[0031] refer to Figure 1 As one implementation, a delivery pipe extending into the first container 2 is provided at the carbon dioxide inlet, and a gas disperser 11 is provided at the end of the delivery pipe. By providing the gas disperser 11, carbon dioxide gas can be more evenly dispersed in the matrix solution in the first container 2.

[0032] It should be noted that the gas disperser 11 mainly includes a metal aeration head with a micropore diameter of 0.5-100 micrometers and a porosity of 35%-50%, and aeration bubbles with a size of 0.1-2 mm.

[0033] refer to Figure 1 In one embodiment, the first container 2 and the second container 7 are connected by a magnetic pump 6. By setting the magnetic pump 6, the calcium bicarbonate solution 10 generated in the first container 2 can be pumped to the second container 7 more quickly.

[0034] It should be noted that by adding a needle valve and a flow meter 13 between the magnetic pump 6 and the second container 7, the flow rate can be finely controlled.

[0035] refer to Figure 1 In one embodiment, a filter 5 is provided between the magnetic pump 6 and the first container 2. By providing the filter 5, particles in the calcium bicarbonate solution 10 can be prevented from entering the conveying pipeline between the first container 2 and the second container 7 and the magnetic pump 6, thereby preventing damage to the pipeline and the magnetic pump 6 and increasing maintenance costs.

[0036] It should be noted that filter 5 is a split-type filter, which facilitates later maintenance and filter element replacement.

[0037] refer to Figure 1 As one implementation method, a pH meter 8 is provided on the side of the second container 7, which extends into the interior of the second container 7. The pH meter 8 can monitor the pH value of the calcium bicarbonate solution 10 in the second container 7 throughout the process.

[0038] refer to Figure 1 As one implementation, the second container 7 is provided with a filter screen 12 for placing recycled aggregate. The filter screen 12 can provide a stable support structure so that the recycled aggregate is evenly distributed during the carbonization process, which helps to ensure that each aggregate can fully contact the calcium bicarbonate solution 10, thereby achieving a more uniform carbonization effect.

[0039] It should be noted that the filter screen 12 is a metal filter screen, and the filter screen 12 has a certain distance from the ground of the second container 7.

[0040] refer to Figure 1As one implementation method, a level gauge is installed inside the first container 2 to monitor the liquid level in the first container 2. An alarm is triggered once the liquid level exceeds the set value.

[0041] It should be noted that in this embodiment, the first temperature controller 4, the second temperature controller 9, the stirring device 3, the gas flow meter 13, the magnetic pump 6, the pH meter 8, and the level gauge are all electrically connected to the control system. The control system is a computer terminal system, which controls the operation of each block, regulates the temperature, carbon dioxide flow rate, stirring time, carbonization time, etc., and is equipped with an over-limit alarm device. Once the carbon dioxide gas in the gas cylinder is lower than the set value or the liquid level in the first container 2 is lower than the set value, the alarm signal is fed back to the computer terminal system, and the computer terminal system shuts off the magnetic pump to prevent the magnetic pump 6 from being damaged due to dry pumping.

[0042] refer to Figure 2 In this embodiment, the carbonization step of the recycled aggregate is as follows:

[0043] 1. The pretreated recycled aggregate is put into the first container 2 through the first recycled aggregate inlet. Then, deionized water is injected into the first container through the deionized water inlet by the chiller. Then, the first temperature controller 4 is controlled by the control system to keep the first container 2 in a low temperature environment.

[0044] 2. The stirring device 3 is started by the control system to fully stir the deionized water and recycled aggregate. The stirring time and stirring rate can be set by the control system.

[0045] 3. Carbon dioxide gas is introduced into the matrix solution formed by deionized water and recycled aggregate through the carbon dioxide inlet. The flow rate of carbon dioxide gas is controlled by the gas flow meter 13, and the carbon dioxide gas is more evenly dispersed in the matrix solution by the gas disperser 11.

[0046] 4. After stirring is complete, the calcium bicarbonate solution 10 generated after thorough stirring is pumped into the second container 7 by the magnetic pump 6. The calcium bicarbonate solution 10 passes through the filter 5 to filter out the particles in the solution and place the particles into the pipeline or the magnetic pump 6. The temperature of the second temperature controller 9 is controlled by the control system to keep the temperature in the second container 7 at the set value.

[0047] 5. Add recycled aggregate into the second container 7 through the second recycled aggregate inlet, place the recycled aggregate into the filter screen 12, pump the prepared calcium bicarbonate solution 10 from the first container 2 into the container, heat the solution in the second container 7 to the target temperature through the second temperature controller 9, then turn on the stirring device 3 to fully stir the solution and recycled aggregate in the second container 7, and at the same time start the pH meter 8 to monitor the pH value of the solution throughout the process until the carbonization time is reached and then stop the operation.

[0048] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0049] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A carbonized recycled aggregate preparation device, characterized in that, It includes a carbon dioxide cylinder connected in sequence, a first container for preparing calcium bicarbonate solution, and a second container for carbonizing recycled aggregate. The first container and the second container are respectively equipped with a first temperature controller and a second temperature controller for controlling the temperature.

2. The carbonized recycled aggregate preparation apparatus according to claim 1, characterized in that, Both the first container and the second container are equipped with a stirring device. The stirring device includes a drive motor located at the top of the first container and a stirring rod connected to the drive motor and extending into the first container.

3. The carbonized recycled aggregate preparation apparatus according to claim 2, characterized in that, The first container is equipped with a carbon dioxide inlet, a deionized water inlet, and a first recycled aggregate inlet, while the second container is equipped with a second recycled aggregate inlet.

4. The carbonized recycled aggregate preparation apparatus according to claim 3, characterized in that, A gas flow meter is installed on the connecting pipeline between the carbon dioxide cylinder and the carbon dioxide inlet.

5. The carbonized recycled aggregate preparation apparatus according to claim 4, characterized in that, The carbon dioxide inlet is provided with a delivery pipe that extends into the first container, and the end of the delivery pipe is provided with a gas disperser for dispersing carbon dioxide gas.

6. The apparatus for preparing carbonized recycled aggregate according to claim 1, characterized in that, The first container and the second container are connected by a magnetic pump.

7. The carbonized recycled aggregate preparation apparatus according to claim 6, characterized in that, A filter is provided between the magnetic pump and the first container.

8. The carbonized recycled aggregate preparation apparatus according to claim 1, characterized in that, A pH meter that extends into the second container is provided on the side of the second container.

9. The carbonized recycled aggregate preparation apparatus according to claim 1, characterized in that, The second container is equipped with a filter screen for holding recycled aggregate.

10. The carbonized recycled aggregate preparation apparatus according to claim 1, characterized in that, The first container is equipped with a level gauge.

Images