Solid waste carbonation modification device based on amino carbon dioxide absorption circulation liquid and modification method thereof

Abstract

The invention discloses a solid waste carbonation modification device based on amino carbon dioxide absorption circulating liquid and a modification method thereof, and aims to solve the problems that in the solid waste carbonation modification process, carbonate generated on the surface of solid waste often does not have activity, the activity improvement degree of the solid waste after carbonation modification is reduced, and no effective solution exists. A membrane separation device and at least one carbon dioxide storage tank are arranged on a first pipeline, and the first pipeline is communicated with a carbonation solid waste powder treatment assembly; the first pipeline is arranged in the main container, the main container is connected with the auxiliary container, the stirrer is arranged in the main container, the main container is provided with a first air outlet pipe in a matched mode, the first air outlet pipe is communicated with the outside, the purification device, the first electromagnetic pump and the second electromagnetic pump are all arranged on the second pipeline, and the first electromagnetic pump is arranged between the auxiliary container and the second pipeline. The second pipeline is communicated with the auxiliary container; after an amino solution containing saturated carbon dioxide is formed according to preset requirements, the calculated solid waste powder amount is subjected to a solid waste carbonation modification treatment process.

Description

Technical Field

[0001] The present invention specifically relates to a solid waste carbonation modification device based on amine-based carbon dioxide absorption circulating liquid and a modification method thereof. Background Art

[0002] Solid waste pollution control is of great significance to improving the ecological environment and strengthening the prevention of environmental risks. At the same time, solid waste contains a wealth of recyclable materials. Through proper treatment and utilization, it is not only conducive to the problem of solid waste pollution, but also one of the important breakthroughs in alleviating my country's resource shortage problem.

[0003] Carbonation modification method is a new industrial solid waste activation treatment technology in recent years. It has been applied to the resource utilization of high-calcium industrial solid wastes such as steel slag, carbide slag, and high-calcium fly ash. In the process of carbonation modification treatment, the free calcium oxide, magnesium oxide and other unstable components contained in industrial solid waste can be converted into calcium carbonate; at the same time, the thermodynamically stable silicon-containing minerals can also be converted into silicon dioxide with volcanic ash activity. Therefore, the carbonation treatment method can achieve multiple purposes such as improving the stability of solid waste mineral admixtures, increasing activity, and efficiently solidifying and sealing carbon dioxide.

[0004] At present, the method of using organic amine solution to absorb carbon dioxide is carbon dioxide capture and emission technology. This technology is widely used and popular, but there are still many shortcomings. The existing chemical absorption method has disadvantages in the subsequent treatment of absorbents. The main problem is that the single use of amine solution has the problem that organic amine is easy to foam, degrade and corrosive. After the modification and other related measures, other related continuous problems such as increased economic costs are caused. In addition, the amine-based solution that adsorbs carbon dioxide has the risk of carbon dioxide escaping during the subsequent transportation process. The energy consumption of the amine-based solution is high, which reduces the carbon emission reduction effect of carbonated solid waste throughout the life cycle. In addition, during the carbonation modification process of solid waste, the carbonate generated on the surface of solid waste is often inactive, which reduces the degree of activity improvement of solid waste after carbonation modification. When carbonated modified solid waste is added to concrete as a mineral admixture, the shell formed by inert carbonate minerals will also inhibit the dissolution and reaction of the phases in the solid waste particles, and further reduce the activity index of the solid waste mineral admixture. At present, there are no relevant standardized treatment devices and standardized treatment methods. Summary of the invention

[0005] The present invention provides a solid waste carbonation modification device based on amine-based carbon dioxide absorption circulating liquid and a modification method thereof to solve the above problems.

[0006] The present invention provides the following technical solutions: A solid waste carbonation modification device based on amine-based carbon dioxide absorption circulating liquid, comprising a carbon dioxide separation and storage assembly and a carbonated solid waste powder processing assembly, wherein the carbon separation and storage assembly comprises a first pipeline, a membrane separation device and at least one carbon dioxide storage tank, the membrane separation device and the at least one carbon dioxide storage tank are both arranged on the first pipeline, the membrane separation device is arranged close to the air inlet end of the first pipeline, and the air outlet end of the first pipeline is connected to the carbonated solid waste powder processing assembly; The carbonated solid waste powder processing assembly includes a main container, an agitator, a second pipeline, a purification device, a first electromagnetic pump, a secondary container, a second electromagnetic pump and a first air outlet pipe. The main container and the secondary container are horizontally arranged in parallel. The main container is a container with an open top. The first pipeline is arranged at one end of the main container. The air outlet end of the first pipeline is arranged in the main container. The other end of the main container is connected to the secondary container through the second pipeline. An agitator is arranged on the top of the main container. The stirring end of the agitator is arranged in the main container. The main container is equipped with a first air outlet pipe. One end of the first air outlet pipe is connected to the interior of the main container, and the other end of the first air outlet pipe is connected to the outside. The purification device, the first electromagnetic pump and the second electromagnetic pump are all arranged on the second pipeline. The two ends of the second pipeline are respectively connected to the main container. The first electromagnetic pump is arranged between the secondary container and one end of the second pipeline. The other end of the second pipeline is connected to the secondary container through the second electromagnetic pump and the purification device.

[0007] As a preferred solution: the first pipeline includes an air inlet pipe, at least one intermediate pipe and a second air outlet pipe, at least one intermediate pipe is arranged between the air inlet pipe and the second air outlet pipe, the membrane separation device is arranged on the air inlet pipe, one end of the air inlet pipe is the air inlet end, the other end of the air inlet pipe is connected with one end of each intermediate pipe, the other end of each intermediate pipe is connected with one end of the second air outlet pipe, the other end of the second air outlet pipe is the air outlet end, the air outlet end of the second air outlet pipe is arranged in the main container, and each intermediate pipe is provided with a carbon dioxide storage tank.

[0008] As a preferred solution: the second pipeline includes a first component tube, a second component tube, a third component tube, a fourth component tube and a fifth component tube, the first component tube is provided with an upper valve, one end of the first component tube is connected to the main container, the other end of the first component tube is connected to the first electromagnetic pump, one end of the second component tube is connected to the first electromagnetic pump, the other end of the second component tube is connected to the auxiliary container, one end of the third component tube is connected to the auxiliary container, the other end of the third component tube is connected to the purification device, one end of the fourth component tube is connected to the purification device, the other end of the fourth component tube is connected to the second electromagnetic pump, the fifth component tube is provided with a lower valve, one end of the fifth component tube is connected to the second electromagnetic pump, and the other end of the fifth component tube is connected to the main container.

[0009] The solid waste carbonation modification method based on amine-based carbon dioxide absorption circulating liquid is realized by using the solid waste carbonation modification device based on amine-based carbon dioxide absorption circulating liquid described above. The solid waste carbonation modification method comprises the following steps: after an amine-based solution containing saturated carbon dioxide is formed according to predetermined requirements, the calculated amount of solid waste powder is subjected to a solid waste carbonation modification treatment process.

[0010] As a preferred solution: according to the experimental requirements, the corresponding amino acid salt type and potassium hydroxide reaction formula are selected, and the raw material masses of the amino acid salt and potassium hydroxide are determined respectively; after the determined amino acid salt and potassium hydroxide raw materials are added to water to prepare the amine solution, the prepared amine solution is injected into the main container, and the injection is stopped after reaching a predetermined height, and the gas outlet end of the first pipeline is opened to ensure that carbon dioxide gas enters below the liquid surface in the main container at a flow rate of 180-220 ml / min, and the amine solution absorbs carbon dioxide gas, and 5-15 ml of solution is taken out every 40-60 minutes to measure the pH value. When the pH value of the solution is continuously detected to be unchanged, the amine solution saturated with carbon dioxide is formed, and the gas outlet end of the first pipeline is closed at this time; the amount of solid waste powder is calculated and put into the main container, and the stirring speed is ensured to be at 1000-1500 rpm. The pH value of the amine solution is measured every 20-30 minutes. After the pH value is continuously tested and shown to be unchanged for more than two times, it indicates that the carbonization is completed, and the acidified and modified solid waste powder is taken out.

[0011] As a preferred solution: the calculation process of the amount of solid waste powder is to calculate the amount of solid waste powder to be added according to the amount of carbon dioxide adsorption by the amino acid salt solution. The specific process is: the amount of solid waste powder is calculated according to the equation CaO+CO2→CaCO3, and the amount of carbon dioxide absorption in the amino solution is obtained according to the acid-base titration experiment. The amount of calcium oxide to react with the carbon dioxide absorption is obtained, and then the amount of solid waste powder added is reversed.

[0012] As a preferred solution: the concentration of the amine solution is 3-6 mol / L.

[0013] As a preferred solution, the amine solution saturated with carbon dioxide is an amine solution in a state of being saturated with carbon dioxide, and the carbon dioxide absorption amount of the amine solution saturated with carbon dioxide is determined by an acid-base titration experiment using an amino acid salt solution used for the first time.

[0014] Compared with the prior art, the present invention provides a solid waste carbonation modification device and modification method based on amine-based carbon dioxide absorption circulating liquid, which has the following beneficial effects: 1. The solid waste carbonation modification device based on the amino carbon dioxide absorption circulating liquid in the present invention has a reasonable and simple structure, and can be used to improve existing equipment. The improvement is easy to implement with low difficulty. The mutual cooperation between the carbon dioxide separation and storage assembly and the carbonated solid waste powder processing assembly is conducive to the formation of a quantitative solid waste carbonation modification process.

[0015] 2. The solid waste carbonation modification method based on the amino carbon dioxide absorption circulating liquid of the present invention uses an amino acid salt solution as a carbon dioxide absorption carrier, and performs a carbonation reaction with the solid waste after absorbing carbon dioxide. By utilizing the crystal stabilizing effect of amino acid salts on calcium carbonate, amorphous, vaterite and other metastable, highly active calcium carbonates are allowed to exist in the carbonated solid waste for a long time, thereby increasing the activity of the carbonate shell layer on the surface of the carbonated solid waste, thereby increasing the activity index of the carbonated solid waste as a cement-based material. Since amino acid salts have a strong ability to absorb carbon dioxide, the waste of carbon dioxide gas caused by excessive escape in conventional carbonation modification can be avoided, forming a reasonable and standardized resource processing and utilization process.

[0016] 3. The present invention can improve the efficiency of solid waste carbon dioxide storage and solidification through the cooperation between the carbon dioxide separation and storage assembly and the carbonated solid waste powder processing assembly, and can also induce the formation of metastable carbonate minerals on the surface of the solid waste, standardize and quantitatively enhance the activity of the solid waste, improve the activity of the carbonated modified solid waste as a concrete mineral admixture, and form a cyclic and standardized utilization and treatment process of the amine-based solution, which is conducive to the development and standardization of the on-site utilization process of carbon dioxide and the reduction of energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial front view structural diagram of the carbon dioxide separation and storage assembly; Figure 2 It is a schematic diagram of the overall main structure of the present invention; Figure 3 It is a partial front view structural diagram of the carbonated solid waste powder processing assembly; Figure 4 Schematic diagram of steel slag carbonation results under different carbonation conditions; Figure 5 Schematic diagram of the comparison curve of calcium carbonate crystal form after carbonation of steel slag at different carbonation temperatures.

[0018] In the figure: 1-first pipeline; 1-1-inlet pipe; 1-2-middle pipe; 1-3-second outlet pipe; 2-membrane separation device; 3-carbon dioxide storage tank; 4-main container; 5-agitator; 6-second pipeline; 6-1-first component pipe; 6-2-second component pipe; 6-3-third component pipe; 6-4-fourth component pipe; 6-5-fifth component pipe; 7-purification device; 8-first electromagnetic pump; 9-auxiliary container; 10-second electromagnetic pump; 11-first outlet pipe; 12-upper valve; 13-lower valve; 14-clean outlet pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Specific implementation method 1: Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present embodiment is described. The present embodiment includes a carbon dioxide separation and storage assembly and a carbonated solid waste powder processing assembly. The carbon separation and storage assembly includes a first pipeline 1, a membrane separation device 2 and at least one carbon dioxide storage tank 3. The membrane separation device 2 and the at least one carbon dioxide storage tank 3 are both arranged on the first pipeline 1. The membrane separation device 2 is arranged close to the air inlet end of the first pipeline 1, and the air outlet end of the first pipeline 1 is connected to the carbonated solid waste powder processing assembly. The number of carbon dioxide storage tanks 3 is an even number, which is conducive to the uniform arrangement of carbon dioxide reserves and to improving the uniformity of subsequent solid waste carbonation modification treatment. The adaptable number of carbon dioxide storage tanks 3 is two, four, six or other even numbers, depending on the specific experimental requirements and the scale conditions of the actual adaptation site.

[0021] The carbonated solid waste powder processing assembly comprises a main container 4, an agitator 5, a second pipeline 6, a purification device 7, a first electromagnetic pump 8, a secondary container 9, a second electromagnetic pump 10 and a first air outlet pipe 11. The main container 4 and the secondary container 9 are arranged horizontally in parallel. The main container 4 is a container with an open top. The first pipeline 1 is arranged at one end of the main container 4. The air outlet end of the first pipeline 1 is arranged in the main container 4. The other end of the main container 4 is connected to the secondary container 9 through the second pipeline 6. The top of the main container 4 is provided with an agitator 5. The stirring end of the agitator 5 is arranged in the main container 4. A first air outlet pipe 11 is provided in conjunction with the main container 4, one end of which is connected to the interior of the main container 4, and the other end of the first air outlet pipe 11 is connected to the outside. The purification device 7, the first electromagnetic pump 8 and the second electromagnetic pump 10 are all arranged on the second pipeline 6, and the two ends of the second pipeline 6 are respectively connected to the main container 4. The main container 4 is a plastic container, and its shape is a square or cylindrical container with an open top. The first electromagnetic pump 8 is arranged between the auxiliary container 9 and one end of the second pipeline 6, and the other end of the second pipeline 6 is connected to the auxiliary container 9 through the second electromagnetic pump 10 and the purification device 7.

[0022] Furthermore, the membrane separation device 2 is provided with a clean gas outlet pipe 14. During use, the flue gas enters from the first pipeline 1. When the flue gas passes through the membrane separation device 2, the membrane separation device 2 separates the carbon dioxide, and the excess gas is discharged through the clean gas outlet pipe 14. The separated carbon dioxide enters the carbon dioxide storage tank 3 through the first pipeline 1 for storage. At the same time, the carbon dioxide can flow into the main container 4 through the first pipeline 1 and be absorbed by the amine-based carbon dioxide absorption solution, and is stirred by the stirrer 5 to achieve carbonation modification and activation of solid waste powder based on the amine-based carbon dioxide absorption solution.

[0023] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1, the first pipeline 1 includes an air inlet pipe 1-1, at least one intermediate pipe 1-2 and a second air outlet pipe 1-3, at least one intermediate pipe 1-2 is arranged between the air inlet pipe 1-1 and the second air outlet pipe 1-3, the membrane separation device 2 is arranged on the air inlet pipe 1-1, one end of the air inlet pipe 1-1 is the air inlet end, the other end of the air inlet pipe 1-1 is connected with one end of each intermediate pipe 1-2, the other end of each intermediate pipe 1-2 is connected with one end of the second air outlet pipe 1-3, the other end of the second air outlet pipe 1-3 is the air outlet end, the air outlet end of the second air outlet pipe 1-3 is arranged in the main container 4, and each intermediate pipe 1-2 is provided with a carbon dioxide storage tank 3.

[0024] Furthermore, the flue gas enters from the air inlet pipe 1-1 and the membrane separation device 2 separates the carbon dioxide in the flue gas, and the separated carbon dioxide is transported to the carbon dioxide storage tank 3 through the intermediate pipe 1-2 for storage. Two carbon dioxide storage tanks 3 are arranged on the intermediate pipe 1-2 to avoid that a single carbon dioxide storage tank 3 does not have enough space to safely store the processed carbon dioxide gas when processing part of the flue gas. At the same time, the number of carbon dioxide storage tanks 3 can also be increased or decreased according to actual conditions.

[0025] Specific implementation method three: This implementation method is a further limitation of specific implementation method one or two, the second pipeline 6 includes a first component tube 6-1, a second component tube 6-2, a third component tube 6-3, a fourth component tube 6-4 and a fifth component tube 6-5, the first component tube 6-1 is provided with an upper valve 12, one end of the first component tube 6-1 is connected to the main container 4, the other end of the first component tube 6-1 is connected to the first electromagnetic pump 8, one end of the second component tube 6-2 is connected to the first electromagnetic pump 8, the other end of the second component tube 6-2 is connected to the auxiliary container 9, one end of the third component tube 6-3 is connected to the auxiliary container 9, the other end of the third component tube 6-3 is connected to the purification device 7, one end of the fourth component tube 6-4 is connected to the purification device 7, the other end of the fourth component tube 6-4 is connected to the second electromagnetic pump 10, the fifth component tube 6-5 is provided with a lower valve 13, one end of the fifth component tube 6-5 is connected to the second electromagnetic pump 10, and the other end of the fifth component tube 6-5 is connected to the main container 4.

[0026] Furthermore, when the lower valve 13 is opened, the second electromagnetic pump 10 is started to extract the analyzed amine-based carbon dioxide absorption solution, and at the same time, it flows through the fifth component pipe 6-5 and the fourth component pipe 6-4 through the purification device 7 and enters the auxiliary container 9, so as to facilitate the removal of the solid waste powder in the purification device 7; after the solid waste powder is taken out, the lower valve 13 is closed, the upper valve 12 is opened, and the first electromagnetic pump 8 is started to extract the amine-based solution in the auxiliary container 9 and inject it into the main container 4. Thus, the amine-based carbon dioxide absorption solution is recycled to carbonate the solid waste powder.

[0027] Specific implementation method four: Combination Figures 1 to 5 The present embodiment is described. The solid waste carbonation modification method of the present embodiment is to form an amine solution containing saturated carbon dioxide according to predetermined requirements, and then subject the calculated amount of solid waste powder to a solid waste carbonation modification treatment process.

[0028] The solid waste carbonation modification device involved therein includes a carbon dioxide separation and storage assembly and a carbonated solid waste powder processing assembly, wherein the carbon separation and storage assembly includes a first pipeline 1, a membrane separation device 2 and at least one carbon dioxide storage tank 3, the membrane separation device 2 and at least one carbon dioxide storage tank 3 are both arranged on the first pipeline 1, the membrane separation device 2 is arranged close to the air inlet end of the first pipeline 1, and the air outlet end of the first pipeline 1 is connected to the carbonated solid waste powder processing assembly; The carbonated solid waste powder processing assembly includes a main container 4, an agitator 5, a second pipeline 6, a purification device 7, a first electromagnetic pump 8, a secondary container 9, a second electromagnetic pump 10 and a first air outlet pipe 11. The main container 4 and the secondary container 9 are arranged horizontally in parallel. The main container 4 is a container with an open top. The first pipeline 1 is arranged at one end of the main container 4. The air outlet end of the first pipeline 1 is arranged in the main container 4. The other end of the main container 4 is connected to the secondary container 9 through the second pipeline 6. The top of the main container 4 is provided with an agitator 5. The stirring of the agitator 5 The end is arranged in the main container 4, and the main container 4 is equipped with a first air outlet pipe 11. One end of the first air outlet pipe 11 is connected to the interior of the main container 4, and the other end of the first air outlet pipe 11 is connected to the outside. The purification device 7, the first electromagnetic pump 8 and the second electromagnetic pump 10 are all arranged on the second pipeline 6, and the two ends of the second pipeline 6 are respectively connected to the main container 4. The first electromagnetic pump 8 is arranged between the auxiliary container 9 and one end of the second pipeline 6, and the other end of the second pipeline 6 is connected to the auxiliary container 9 through the second electromagnetic pump 10 and the purification device 7.

[0029] Specifically, the first pipeline 1 includes an air inlet pipe 1-1, at least one intermediate pipe 1-2 and a second air outlet pipe 1-3, at least one intermediate pipe 1-2 is arranged between the air inlet pipe 1-1 and the second air outlet pipe 1-3, the membrane separation device 2 is arranged on the air inlet pipe 1-1, one end of the air inlet pipe 1-1 is the air inlet end, the other end of the air inlet pipe 1-1 is connected with one end of each intermediate pipe 1-2, the other end of each intermediate pipe 1-2 is connected with one end of the second air outlet pipe 1-3, the other end of the second air outlet pipe 1-3 is the air outlet end, the air outlet end of the second air outlet pipe 1-3 is arranged in the main container 4, and each intermediate pipe 1-2 is provided with a carbon dioxide storage tank 3.

[0030] Specifically, the second pipeline 6 includes a first component tube 6-1, a second component tube 6-2, a third component tube 6-3, a fourth component tube 6-4 and a fifth component tube 6-5, the first component tube 6-1 is provided with an upper valve 12, one end of the first component tube 6-1 is connected to the main container 4, the other end of the first component tube 6-1 is connected to the first electromagnetic pump 8, one end of the second component tube 6-2 is connected to the first electromagnetic pump 8, the other end of the second component tube 6-2 is connected to the auxiliary container 9, one end of the third component tube 6-3 is connected to the auxiliary container 9, the other end of the third component tube 6-3 is connected to the purification device 7, one end of the fourth component tube 6-4 is connected to the purification device 7, the other end of the fourth component tube 6-4 is connected to the second electromagnetic pump 10, and the fifth component tube 6-5 is provided with a lower valve 13, one end of the fifth component tube 6-5 is connected to the second electromagnetic pump 10, and the other end of the fifth component tube 6-5 is connected to the main container 4.

[0031] The present invention can capture and remove greenhouse gases such as carbon dioxide in flue gas in a factory, and utilize high-calcium solid waste for in-situ analysis, which can facilitate the standardized recycling of amine-based solutions.

[0032] Specific implementation method 5: This implementation method is a further limitation of specific implementation method 4. In this implementation method, the corresponding amino acid salt type and potassium hydroxide reaction formula are selected according to the experimental requirements, and the raw material quality of the amino acid salt and potassium hydroxide is determined respectively; after the determined amino acid salt and potassium hydroxide raw materials are added into water to prepare the amine solution, the prepared amine solution is injected into the main container 4, and the injection is stopped after reaching a predetermined height, and the outlet end of the first pipeline 1 is opened to ensure that the carbon dioxide gas is 180~220 ml / min flow rate into the main container 4 below the liquid level, the amine solution absorbs carbon dioxide gas, 5-15 ml of solution is taken out every 40-60 minutes to measure the pH value, when the pH value of the solution is continuously detected to be unchanged, it means that the amine solution is saturated with carbon dioxide, forming an amine solution saturated with carbon dioxide. The amine solution saturated with carbon dioxide is the amine solution in the state of saturated with carbon dioxide, and at this time, the gas outlet end of the first pipeline 1 is closed; the amount of solid waste powder is calculated and put into the main container 4, the stirring speed is set to 1000-1500 rpm, the pH value of the amine solution is measured every 20-30 minutes, and when the pH value is detected to be unchanged for more than two times, it indicates that the carbonization is completed, and the acidified and modified solid waste powder can be taken out.

[0033] In this embodiment, according to sample experiments, after the calculated amount of solid waste powder is placed in the main container 4, the stirring speed is set to 1000-1500 rpm, and the pH value of the amine solution is measured every 20-30 minutes. After one hour, carbonization is basically completed and the carbonization conversion rate is basically flat.

[0034] In this embodiment, the amine-based solution saturated with carbon dioxide is an amine-based solution in a state of being saturated with carbon dioxide. The carbon dioxide absorption amount of the amine-based solution saturated with carbon dioxide is determined by an acid-base titration experiment using an amino acid salt solution used for the first time.

[0035] In this embodiment, the solid waste carbonation modification device mainly uses amino acid solution as the main carrier for adsorbing carbon dioxide and carbonating high-calcium solid waste. It is a non-toxic and harmless bio-friendly material with good carbon dioxide adsorption performance, and also reduces the problem of corrosion by chemical solutions during use.

[0036] Specific implementation method six: This implementation method is a further limitation of specific implementation method four or five. The calculation process of the amount of solid waste powder is to calculate the amount of solid waste powder to be added according to the amount of carbon dioxide adsorption by the amino acid salt solution. The specific process is: the amount of solid waste powder is calculated according to the equation CaO+CO2→CaCO3, and the amount of carbon dioxide absorption in the amino solution obtained according to the acid-base titration experiment is used to obtain the amount of calcium oxide to react with the carbon dioxide absorption, and then the amount of solid waste powder to be added is reversely deduced.

[0037] In the process of using the solid waste carbonation modification device to carry out the solid waste carbonation modification method, taking the steel slag used as an example, the carbon dioxide absorption capacity of 3 mol / L carbon-rich potassium glycine solution is 19.8×10-4 mol / ml, and the CaO content of the steel slag used is 37.03%. The CaO content in 10g of steel slag is 3.703g, that is, 0.066125 mol, and the amount of carbon-rich potassium glycine solution required for 10g of steel slag is 0.066125 / 19.8×10-4=34 ml. The above calculation principle can be used for the same calculation, and the specific calculation can be carried out according to the measured carbon dioxide adsorption capacity of the amine-based solution and the CaO content in the solid waste powder.

[0038] In this embodiment, the amount of solid waste powder added is calculated according to the following formula: In the above formula, A is the carbon dioxide absorption of the amine-based solution, in mol / mL; B is the volume of the amine-based solution in the device, in mL; 56 is the relative molar mass of CaO, in g / mol; C is the mass fraction of calcium oxide in the corresponding solid waste.

[0039] Specific implementation method 7: This implementation method is a further limitation of specific implementation methods 4, 5 or 6. In this implementation method, the concentration of the amine solution is 3-6 mol / L, and the minimum limit of the concentration of the amine solution to ensure the stable increase of the amount of carbonized solid waste powder is 3 mol / L. When the minimum concentration of the amine solution is 3 mol / L, it can not only increase the amount of solid waste powder carbonized at one time and improve work efficiency, but also make the amine solution fully used.

[0040] Specific implementation method eight: This implementation method is a further limitation of specific implementation methods four, five, six or seven. Figure 4 and Figure 5As shown, the physical properties of the carbonated solid waste in this embodiment are significantly affected by the properties of calcium carbonate crystals. Generally, the most unstable amorphous calcium carbonate is first formed during the carbonation process, and then crystallizes to form metastable aragonite calcium carbonate, and finally forms the most stable calcite calcium carbonate. The device uses an organic matrix of amino acids to control the mineral structure and properties of calcium carbonate generated during the carbonated solid waste, especially stabilizing metastable amorphous calcium carbonate, aragonite calcium carbonate and other crystalline calcium carbonate, and further improves the performance of high-calcium solid waste by changing the polymorphism of calcium carbonate produced by carbonated solid waste. For example, aspartic acid is most effective in stabilizing amorphous calcium carbonate; serine stabilizes amorphous calcium carbonate and vaterite crystalline calcium carbonate; arginine significantly reduces the crystal form of calcium carbonate. As the carbonation temperature increases, the carbonation rate continues to increase. When the temperature is in a lower range below 40°C, the carbonation time can be set to one hour; when the temperature is in a higher range above 40°C, the carbonation time can be set to half an hour. From the results of the infrared spectrum experiment, it can be seen that the calcium carbonate crystal forms generated by carbonating high-calcium solid waste with an amino solution include amorphous calcium carbonate, vaterite and calcite.

[0041] The present invention mainly aims at the drawbacks of the existing chemical absorption method for subsequent treatment of absorbents and then proposes this device, thereby realizing the on-site utilization of carbon dioxide, proposing a solid waste mineralization and decomposition method, and realizing further energy conservation and emission reduction. The amine-based solution not only has a good carbon dioxide adsorption capacity, but also the presence of its functional groups can regulate the crystal form of calcium carbonate, making it have a certain activity, and further weakening the influence of the carbonate mineral shell. The local solid waste powder is used as a desorbent to improve the performance of the solid waste powder while realizing the recycling of the amine-based solution.

Claims

1. A solid waste carbonation modification device based on amine-based carbon dioxide absorption circulating liquid, characterized in that: The invention comprises a carbon dioxide separation and storage assembly and a carbonated solid waste powder processing assembly, wherein the carbon separation and storage assembly comprises a first pipeline (1), a membrane separation device (2) and at least one carbon dioxide storage tank (3), wherein the membrane separation device (2) and the at least one carbon dioxide storage tank (3) are both arranged on the first pipeline (1), the membrane separation device (2) is arranged close to the air inlet end of the first pipeline (1), and the air outlet end of the first pipeline (1) is arranged in communication with the carbonated solid waste powder processing assembly; The carbonated solid waste powder processing assembly comprises a main container (4), an agitator (5), a second pipeline (6), a purification device (7), a first electromagnetic pump (8), a secondary container (9), a second electromagnetic pump (10) and a first air outlet pipe (11); the main container (4) and the secondary container (9) are arranged horizontally in parallel; the main container (4) is a container with an open top; the first pipeline (1) is arranged at one end of the main container (4); the air outlet end of the first pipeline (1) is arranged in the main container (4); the other end of the main container (4) is connected to the secondary container (9) via the second pipeline (6); the top of the main container (4) is provided with an agitator (5); the air outlet end of the agitator (5) is arranged in the main container (4); The stirring end is arranged in the main container (4), and the main container (4) is provided with a first air outlet pipe (11), one end of the first air outlet pipe (11) is connected to the interior of the main container (4), and the other end of the first air outlet pipe (11) is connected to the outside. The purification device (7), the first electromagnetic pump (8) and the second electromagnetic pump (10) are all arranged on the second pipeline (6), and the two ends of the second pipeline (6) are respectively connected to the main container (4). The first electromagnetic pump (8) is arranged between the auxiliary container (9) and one end of the second pipeline (6), and the other end of the second pipeline (6) is connected to the auxiliary container (9) through the second electromagnetic pump (10) and the purification device (7).

2. The solid waste carbonation modification device based on amino carbon dioxide absorption circulating liquid according to claim 1 is characterized in that: The first pipeline (1) comprises an air inlet pipe (1-1), at least one intermediate pipe (1-2) and a second air outlet pipe (1-3), wherein at least one intermediate pipe (1-2) is arranged between the air inlet pipe (1-1) and the second air outlet pipe (1-3), the membrane separation device (2) is arranged on the air inlet pipe (1-1), one end of the air inlet pipe (1-1) is an air inlet end, the other end of the air inlet pipe (1-1) is connected to one end of each intermediate pipe (1-2), the other end of each intermediate pipe (1-2) is connected to one end of the second air outlet pipe (1-3), the other end of the second air outlet pipe (1-3) is an air outlet end, the air outlet end of the second air outlet pipe (1-3) is arranged in a main container (4), and each intermediate pipe (1-2) is provided with a carbon dioxide storage tank (3).

3. The solid waste carbonation modification device based on amino carbon dioxide absorption circulating liquid according to claim 1 or 2, characterized in that: The second pipeline (6) comprises a first component pipe (6-1), a second component pipe (6-2), a third component pipe (6-3), a fourth component pipe (6-4) and a fifth component pipe (6-5); the first component pipe (6-1) is provided with an upper valve (12); one end of the first component pipe (6-1) is connected to the main container (4); the other end of the first component pipe (6-1) is connected to the first electromagnetic pump (8); one end of the second component pipe (6-2) is connected to the first electromagnetic pump (8); the other end of the second component pipe (6-2) is connected to the auxiliary container (9), one end of the third component pipe (6-3) is connected to the auxiliary container (9), the other end of the third component pipe (6-3) is connected to the purification device (7), one end of the fourth component pipe (6-4) is connected to the purification device (7), the other end of the fourth component pipe (6-4) is connected to the second electromagnetic pump (10), a fifth component pipe (6-5) is provided with a lower valve (13), one end of the fifth component pipe (6-5) is connected to the second electromagnetic pump (10), and the other end of the fifth component pipe (6-5) is connected to the main container (4).

4. A solid waste carbonation modification method based on amine-based carbon dioxide absorption circulating liquid, which is implemented using the solid waste carbonation modification device according to claim 1, 2 or 3, characterized in that: The solid waste carbonation modification method is to form an amine solution containing saturated carbon dioxide according to predetermined requirements, and then subject the calculated amount of solid waste powder to a solid waste carbonation modification treatment process.

5. The solid waste carbonation modification method based on amino carbon dioxide absorption circulating liquid according to claim 4 is characterized in that: According to the experimental requirements, the corresponding amino acid salt type and potassium hydroxide reaction formula are selected, and the raw material masses of the amino acid salt and potassium hydroxide are determined respectively; after the determined amino acid salt and potassium hydroxide raw materials are added to water to prepare the amine solution, the prepared amine solution is injected into the main container (4), and the injection is stopped after reaching a predetermined height, and the outlet end of the first pipeline (1) is opened to ensure that carbon dioxide gas enters below the liquid level in the main container (4) at a flow rate of 180-220 ml / min, and the amine solution absorbs carbon dioxide gas. 5-15 ml of the solution is taken out every 40-60 minutes to measure the pH value. When the pH value of the solution is continuously detected to be unchanged, the amine solution saturated with carbon dioxide is formed, and the outlet end of the first pipeline (1) is closed at this time; the amount of solid waste powder is calculated and put into the main container (4), and the stirring speed is ensured to be at 1000-1500 rpm. The pH value of the amine solution is measured every 20-30 minutes. When the pH value is continuously detected to be unchanged for more than two times, it indicates that carbonization is completed, and the solid waste powder after acidification modification is taken out.

6. The solid waste carbonation modification method based on amino carbon dioxide absorption circulating liquid according to claim 5 is characterized in that: The calculation process of the amount of solid waste powder is to calculate the amount of solid waste powder according to the amount of carbon dioxide adsorption by the amino acid salt solution. The specific process is: the amount of solid waste powder is calculated according to the equation CaO+CO2→CaCO3, and the amount of carbon dioxide absorption in the amino solution is obtained according to the acid-base titration experiment. The amount of calcium oxide that reacts with the carbon dioxide absorption is obtained, and then the amount of solid waste powder is reversed.

7. The solid waste carbonation modification method based on amino carbon dioxide absorption circulating liquid according to claim 6 is characterized in that: The concentration of the amine solution is 3~6mol / L.

8. The solid waste carbonation modification method based on amino carbon dioxide absorption circulating liquid according to claim 5, 6 or 7, characterized in that: The amine solution saturated with carbon dioxide is an amine solution in a state of being saturated with carbon dioxide. The amine solution saturated with carbon dioxide is subjected to an acid-base titration experiment using an amino acid salt solution used for the first time to determine the carbon dioxide absorption amount of the solution.

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