Gas-solid reactor and steel slag carbon capture equipment
By using a rotary stirring mechanism and catalyst mixing in a gas-solid reactor, rapid carbonization and stable utilization of steel slag are achieved, solving the problems of low efficiency and serious pollution of traditional equipment, and realizing efficient CO2 emission reduction and resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-03-24
AI Technical Summary
Existing steel slag processing equipment suffers from low reaction efficiency, unstable product quality, high energy consumption, and poor equipment durability, resulting in low resource utilization and serious environmental pollution.
A gas-solid reactor is used, and a stirring mechanism is driven by a rotary drive mechanism to achieve uniform mixing of steel slag and catalyst, and to carry out rapid carbonization reaction at room temperature and pressure with low CO2 concentration. Steel slag is used as CO2 mineralization raw material to convert unstable components into carbonates, reduce water consumption and achieve CO2 emission reduction.
It improves the utilization efficiency of steel slag, reduces carbon emissions and environmental pollution, realizes rapid carbonization and stable utilization of steel slag, and enhances the durability and reaction efficiency of the equipment.
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Figure CN224024991U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of gas treatment, and particularly relates to a gas-solid reactor and a steel slag carbon capture device. BACKGROUND
[0002] Steel slag is a solid waste generated in the process of steel production, and its generation rate is 8% to 15% of the crude steel output. It contains rich calcium, iron, silicon, magnesium, aluminum, manganese and other elements, and has high resource utilization value. However, the actual resource utilization degree is not high, and the reasons are as follows: first, the hardness is large, the grindability is poor, and the cost is high when processing and preparing powder; second, the mineral (C2S, C2F) crystal structure of the steel slag is dense, and the content of high-activity C2S and C3S minerals is less, which makes the hydration activity of the steel slag lower; third, a small amount of f-CaO and f-MgO exists in the steel slag, which causes volume expansion after hydration and causes volume stability problems.
[0003] As a byproduct of steel production, steel slag has a huge stock and is difficult to handle. The traditional treatment method has many drawbacks, such as occupying land and polluting the environment. Steel slag carbonization technology is a new treatment approach, but the existing reaction equipment has problems such as low reaction efficiency, unstable product quality, high energy consumption, and poor equipment durability, so new equipment needs to be developed. SUMMARY
[0004] The purpose of the present application is to provide a gas-solid reactor and a steel slag carbon capture device to realize rapid carbonization of steel slag, improve the utilization efficiency of steel slag and reduce carbon emissions, and reduce environmental pollution.
[0005] In order to achieve the above-mentioned purpose, the present application provides a gas-solid reactor for steel slag treatment, which comprises:
[0006] A reactor body is provided with a solid material feeding port for feeding steel slag at the first end, a gas feeding port is provided on the reactor body near the solid material feeding port, the gas feeding port is in communication with an external catalyst device, a stirring mechanism is provided in the reactor body along the axial direction, and a discharge port is provided at the position near the tail end below the reactor body.
[0007] A rotary drive mechanism is installed at the tail end of the reactor body, and the rotary drive mechanism is connected with the stirring mechanism and used to drive the stirring mechanism to rotate, so as to drive the steel slag and the external catalyst in the reactor body to mix and react uniformly and be transported along the axial direction to the discharge port.
[0008] In some embodiments, the stirring mechanism comprises:
[0009] A stirring shaft is provided in the reactor body along the axial direction, and the tail end of the stirring shaft is rotationally drivenly connected with the rotary drive mechanism.
[0010] stirring fins arranged on the outer periphery of the stirring shaft, the number of the stirring fins being multiple and arranged along the axial direction of the stirring shaft.
[0011] In some embodiments, the stirring mechanism further comprises baffles arranged on the outer periphery of the stirring shaft, the number of the baffles being multiple and arranged close to the corresponding stirring fins respectively, each of the baffles being located at the front end of the corresponding stirring fin along the material conveying direction.
[0012] In some embodiments, the stirring fin comprises a radially extending rake rod and a rake plate mounted on the end of the rake rod away from the stirring shaft, the deflection angle of the rake plate ranging from 4° to 6°.
[0013] In some embodiments, the stirring mechanism further comprises:
[0014] a first helical blade mounted on the leading end of the stirring shaft and arranged corresponding to the solid material feeding port;
[0015] a second helical blade mounted on the trailing end of the stirring shaft and arranged corresponding to the discharging port, the outer diameter of the second helical blade being larger than that of the first helical blade.
[0016] In some embodiments, the reactor body is provided below with multiple nitrogen injection interfaces arranged at intervals, the ends of the multiple nitrogen injection interfaces away from the reactor body are communicated with communication pipes, and the communication pipes are communicated with external nitrogen supply equipment.
[0017] In some embodiments, the multiple nitrogen injection interfaces are located between the discharging port and the leading end of the reactor body.
[0018] In some embodiments, the discharging port is further connected with a discharging pipe, and the discharging pipe is provided with a plate plug valve.
[0019] In some embodiments, the upper part of the reactor body is provided with an air outlet, and the air outlet is arranged close to the trailing end of the reactor body.
[0020] The second aspect of the present application provides a steel slag carbon capture device, which comprises the gas-solid reactor as described above.
[0021] By the technical scheme, the gas-solid reactor comprises a reactor body and a rotary driving mechanism; a solid material feeding port for feeding steel slag is arranged at a head end of the reactor body, a gas feeding port is arranged on the reactor body close to the solid material feeding port, the gas feeding port is communicated with an external catalyst device, a stirring mechanism is arranged in the reactor body in an axial direction, and a discharge port is arranged at a position close to a tail end of the reactor body; the rotary driving mechanism is installed at the tail end of the reactor body, and is connected with the stirring mechanism and used for driving the stirring mechanism to rotate, so as to drive the steel slag and the external catalyst in the reactor body to mix and react uniformly and be transported to the discharge port in the axial direction. The application adopts a novel internal structure of the gas-solid reactor, adopts a special layout, ensures that the steel slag is fully mixed with carbon dioxide and moisture, and improves the reaction uniformity. Moreover, the rapid carbonization of the steel slag under the conditions of normal temperature, normal pressure and low CO2 concentration can be realized, the water consumption is reduced, and the heat transfer, mass transfer and chemical reaction of the gas-liquid-solid three phases are realized. In addition, by using the steel slag as the CO2 mineralization raw material, the unstable components in the steel slag can be converted into carbonates, and the dual benefits of CO2 emission reduction and stable utilization of the steel slag are realized.
[0022] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0023] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the embodiments of the present application together with the following specific embodiments, but do not constitute a limitation of the embodiments of the present application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:
[0024] Figure 1 It is a front view of the gas-solid reactor of the present application;
[0025] Figure 2 It is a top view of the gas-solid reactor of the present application.
[0026] Explanation of reference signs
[0027] 100 gas-solid reactor 14 partition
[0028] 10 rotary driving mechanism 15 first spiral blade
[0029] 11 stirring mechanism 16 second spiral blade
[0030] 12 stirring shaft 17 discharge pipe
[0031] 13 stirring fin 18 nitrogen injection interface
[0032] 131 Rake rod 19 Reactor body
[0033] 132 rake plate Detailed Implementation
[0034] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.
[0035] The gas-solid reactor and steel slag carbon capture device according to this application are described below with reference to the accompanying drawings.
[0036] like Figure 1 and Figure 2 As shown, this application provides a gas-solid reactor 100 for steel slag treatment. The gas-solid reactor 100 includes a reactor body 19 and a rotary drive mechanism 10. The reactor body 19 has a solid material feed port for feeding steel slag at its front end, and a gas feed port near the solid material feed port on the reactor body 19. The gas feed port is connected to an external catalyst device. An agitator 11 is arranged axially inside the reactor body 19, and a discharge port is opened at the lower end of the reactor body 19 near its rear end. The rotary drive mechanism 10 is installed at the rear end of the reactor body 19. The rotary drive mechanism 10 is connected to the agitator 11 and is used to drive the agitator 11 to rotate, so as to drive the steel slag inside the reactor body 19 and the external catalyst to mix and react, and then transport them axially to the discharge port.
[0037] In this embodiment, when steel slag needs to be processed, the steel slag to be reacted is added into the reactor body 19 through the solid material feeding port, and the catalyst is added into the reactor body 19 through the gas feeding port, so that the catalyst and steel slag can undergo a carbonization reaction within the reactor body 19. Since a stirring mechanism 11 is installed inside the reactor body 19, when the stirring mechanism 11 rotates, it can stir the catalyst and steel slag while simultaneously moving the material towards the tail end of the reactor body 19. Thus, the carbonized steel slag material is discharged from the tail end of the reactor body 19 through the discharge port. This application adopts a novel internal structure of the gas-solid reactor 100, employing a special layout to ensure thorough mixing of steel slag with carbon dioxide, water, etc., improving reaction uniformity. Furthermore, it can achieve rapid carbonization of steel slag under normal temperature, normal pressure, and low CO2 concentration conditions, reducing water consumption and realizing heat transfer, mass transfer, and chemical reactions in the gas-liquid-solid three-phase system. In addition, by using steel slag as a CO2 mineralization raw material, unstable components in the steel slag can be converted into carbonates, achieving the dual benefits of CO2 emission reduction and stable utilization of steel slag.
[0038] In some embodiments, the stirring mechanism 11 comprises a stirring shaft 12 and stirring fins 13; the stirring shaft 12 is arranged axially through the reactor body 19, and the tail end of the stirring shaft 12 is rotationally driven connected with the rotation driving mechanism 10; the stirring fins 13 are arranged on the outer periphery of the stirring shaft 12, and the number of the stirring fins 13 is multiple and arranged in the axial direction of the stirring shaft 12.
[0039] In the present application, the rotation driving mechanism 10 can be in the form of a rotation driving structure of a rotation driving motor, and the output shaft of the rotation driving motor is driving connected with the tail end of the stirring shaft 12, so that the stirring shaft 12 can be rotated when the rotation driving motor is started. When the steel slag is added into the reactor body 19 through the solid material feeding port, and the catalyst is added into the reactor body 19 through the gas feeding port, after the steel slag and the catalyst are both added into the reactor body 19, the stirring shaft 12 is rotated so as to carry the materials in the axial direction, and the steel slag and the catalyst in the reactor body 19 are stirred and dispersed by the stirring fins 13. The stirring fins 13 are helically distributed on the stirring shaft 12, which can carry the materials in the axial direction to the tail of the reactor body 19 while dispersing the materials. Since the rotating speed of the stirring shaft 12 is adjustable, the running time of the steel slag and the catalyst in the reactor body 19 is controllable and adjustable, so that the rotating speed of the stirring shaft 12 can be set according to the carbonization reaction of the steel slag, so as to obtain the optimal reaction materials at the tail discharge port of the reactor body 19.
[0040] In some embodiments, the stirring mechanism 11 further comprises baffles 14 arranged on the outer periphery of the stirring shaft 12, the number of the baffles 14 is multiple and each baffle 14 is arranged close to the corresponding stirring fin 13, each baffle 14 is located at the front end of the corresponding stirring fin 13 in the material conveying direction, and the air flow blocking space is formed between any two adjacent baffles 14. In order to prevent the steel slag from moving too fast towards the tail end along with the air flow in the reactor body 19, one baffle 14 is arranged at the position of the stirring fin 13, and the number of the baffles 14 is less than the number of the stirring fins 13; as shown in the figure, the baffles 14 are installed at the positions of several stirring fins 13 in the above row of multiple stirring fins 13, so that the air flow blocking space is formed between any two adjacent baffles 14, so as to prevent the incomplete reaction caused by the too fast movement of the steel slag. In addition, the multiple air flow blocking spaces can also ensure that the raised raw materials can be settled and fall into the position of the stirring shaft 12 to be spirally discharged due to the weight. Figure 1
[0041] In some embodiments, the stirring fin 13 comprises a radially extending rake rod 131 and a rake plate 132 mounted at the end of the rake rod 131 away from the stirring shaft 12, and the deflection angle of the rake plate 132 ranges from 4° to 6°. In this embodiment, by setting the rake plate 132 in a deflection structure, the reaction mixing uniformity of the catalyst and the steel slag can be improved, and the dispersion of the catalyst and the steel slag can be assisted. In order to prevent the deflection angle of the rake plate 132 from being too large and weakening the dispersion effect, the deflection angle of the rake plate 132 is optimized to range from 4° to 6° to achieve the optimal mixing effect.
[0042] In some embodiments, the stirring mechanism 11 further comprises:
[0043] The first helical blade 15 is mounted at the leading end of the stirring shaft 12 and corresponds to the solid material feeding port.
[0044] The second helical blade 16 is mounted at the trailing end of the stirring shaft 12 and corresponds to the discharge port, and the outer diameter of the second helical blade 16 is greater than that of the first helical blade 15.
[0045] When the steel slag enters the reactor body 19 from the solid material feeding port, the first helical blade 15 provided on the stirring shaft 12 can spiral the steel slag material entering from the solid material feeding port into the reactor body 19 for conveying and mixing at the same time, so as to realize the smooth entry of the steel slag material. The steel slag is a pulverized steel slag with a particle size of 300 mesh, which is added through the solid material feeding port. In addition, by setting the outer diameter of the first helical blade 15 to be smaller than that of the second helical blade 16, the reaction material to be output at the trailing end of the reactor body 19 can be quickly discharged through the spiral of the second helical blade 16, and the steel slag material added at the leading end of the reactor body 19 can slowly enter the reactor body 19 through the spiral of the first helical blade 15, so as to prevent incomplete reaction of the material in the reactor body 19 or material congestion.
[0046] Further, in the present application, the catalyst is a weakly basic liquid, which is configured in a ratio of 1:19 with water, sprayed through the atomizer nozzle, and the dosing amount of the prepared catalyst is 70 kg / 1 t of steel slag, and the dosing flow rate and pressure are controlled by the ball valve. The purified exhaust gas and the catalyst liquid are mixed uniformly in the external atomizing tank to form the exhaust gas containing the catalyst, which enters the reactor body 19 to wait for reaction with the steel slag. When the exhaust gas containing the catalyst in the atomizing tank and the steel slag all enter the reactor body 19, the gas and solid materials move in the same direction. The powdered steel slag is scattered and lifted by the stirring fins 13 in the reactor body 19, and fully contacts and reacts with the exhaust gas containing the catalyst, thereby realizing rapid carbonization treatment of the steel slag, reducing water consumption in the reaction process, and realizing heat transfer, mass transfer, and chemical reaction of the gas-liquid-solid three phases, improving the utilization efficiency of the steel slag and reducing carbon emissions, and reducing environmental pollution.
[0047] In this embodiment, by using purified exhaust gas, catalyst and steel slag for carbonization reaction, the problem of high water consumption in traditional wet carbonization (water-solid ratio greater than 5) can be overcome, the humidity environment of the carbonization reaction is controlled, and the water consumption is less than 5% of the powder consumption, and the water is gradually evaporated in the flue gas carbonization.
[0048] In some embodiments, the discharge port is also connected with a discharge pipe 17, and a plate-insert valve is arranged on the discharge pipe 17. The completed material is brought to the tail of the reactor body 19 by the stirring fins 13 in the reactor body 19. When discharging is needed, the plate-insert valve is opened, and the material is discharged through the second spiral blade 16 to output the material from the discharge pipe 17. When the discharging is completed, the plate-insert valve is closed.
[0049] After the steel slag carbon capture equipment runs for a period of time, cleaning is needed, so a plurality of nitrogen blowing interfaces 18 are arranged at intervals below the reactor body 19, and the ends of the plurality of nitrogen blowing interfaces 18 away from the reactor body 19 are in communication with the communication pipes, and the communication pipes are in communication with the external nitrogen supply equipment.
[0050] In some embodiments, the plurality of nitrogen blowing interfaces 18 are located between the discharge port and the head end of the reactor body 19. Preferably, as shown in Figure 1 and Figure 2As shown, the number of nitrogen injection ports 18 is five, and they are distributed at the front end, the tail end and the middle section of the reactor body 19. During cleaning of the equipment, a large amount of nitrogen is delivered to each nitrogen injection port 18 through a communication pipe by an external nitrogen supply device, and the nitrogen is injected into the reactor body 19 through the nitrogen injection port 18 to clean the dust in the reactor body 19. During the cleaning process, the plate plug valve at the discharge pipe 17 is closed to prevent dust from entering the discharge pipe 17 and causing pollution. The injected dust enters the dust collector through the air outlet at the tail end of the reactor body 19 and is treated to meet the emission standards.
[0051] In some embodiments, an air outlet is formed in the upper part of the reactor body 19, and the air outlet is arranged near the tail end of the reactor body 19. After the carbonization reaction of the steel slag is completed in the reactor body 19, the dust-containing exhaust gas after the reaction is introduced into the dust collector through the air outlet for dust removal treatment, and the treated dust-containing exhaust gas is introduced into the exhaust stack through the pipeline for emission to meet the emission standards.
[0052] The second aspect of the present application provides a steel slag carbon capture device, which comprises the gas-solid reactor 100 as described above. Since the steel slag carbon capture device adopts all the embodiments of the gas-solid reactor 100 described above, it has all the beneficial effects brought by the gas-solid reactor 100, which will not be listed one by one here.
[0053] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0054] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0055] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0056] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.
Claims
1. A gas-solid reactor for steel slag treatment, characterized in that, include: The reactor body (19) has a solid material feeding port for feeding steel slag at the front end. A gas feeding port is provided on the reactor body (19) near the solid material feeding port. The gas feeding port is connected to an external catalyst device. A stirring mechanism (11) is provided in the reactor body (19) along the axial direction. A discharge port is provided at the bottom of the reactor body (19) near the tail end. A rotary drive mechanism (10) is installed at the tail end of the reactor body (19). The rotary drive mechanism (10) is connected to the stirring mechanism (11) and is used to drive the stirring mechanism (11) to rotate, so as to drive the steel slag in the reactor body (19) and the external catalyst to mix and react and be transported axially to the discharge port.
2. The gas-solid reactor according to claim 1, characterized in that, The stirring mechanism (11) includes: A stirring shaft (12) is axially inserted inside the reactor body (19), and the tail end of the stirring shaft (12) is axially connected to the rotary drive mechanism (10). A stirring fin (13) is arranged on the outer periphery of the stirring shaft (12), and there are multiple stirring fins (13) arranged at intervals along the axial direction of the stirring shaft (12).
3. The gas-solid reactor according to claim 2, characterized in that, The stirring mechanism (11) also includes a partition (14) disposed on the outer periphery of the stirring shaft (12). There are multiple partitions (14) and they are respectively disposed close to the corresponding stirring blades (13). Each partition (14) is located at the front end of the corresponding stirring blade (13) along the material conveying direction.
4. The gas-solid reactor according to claim 2, characterized in that, The stirring blade (13) includes a rake bar (131) extending radially and a rake plate (132) mounted on the end of the rake bar (131) away from the stirring shaft (12), the rake plate (132) having a deflection angle range of 4° to 6°.
5. The gas-solid reactor according to claim 2, characterized in that, The stirring mechanism (11) also includes: The first spiral blade (15) is installed at the head end of the stirring shaft (12) and is set corresponding to the solid material feeding port; The second spiral blade (16) is installed at the tail of the stirring shaft (12) and is set corresponding to the discharge port. The outer diameter of the second spiral blade (16) is larger than the outer diameter of the first spiral blade (15).
6. The gas-solid reactor according to any one of claims 1 to 5, characterized in that, The reactor body (19) is provided with a plurality of spaced nitrogen injection ports (18) at the bottom. The ends of the plurality of nitrogen injection ports (18) away from the reactor body (19) are all connected to a connecting pipe, which is connected to an external nitrogen supply device.
7. The gas-solid reactor according to claim 6, characterized in that, Multiple nitrogen injection ports (18) are located between the discharge port and the beginning of the reactor body (19).
8. The gas-solid reactor according to any one of claims 1 to 5, characterized in that, The discharge port is also connected to a discharge pipe (17), and a plate valve is provided on the discharge pipe (17).
9. The gas-solid reactor according to any one of claims 1 to 5, characterized in that, An air outlet is provided on the upper part of the reactor body (19), and the air outlet is arranged near the tail end of the reactor body (19).
10. A steel slag carbon capture device, characterized in that, The steel slag carbon capture device includes a gas-solid reactor (100) according to any one of claims 1 to 9.