Steel slag carbon capture equipment and process method

Abstract

The invention discloses steel slag carbon capture equipment and a process method. The equipment comprises a gas-solid reactor, an atomization device and a dust removal device, the gas-solid reactor comprises a reactor body as well as a feeding mechanism and a rotary driving mechanism which are respectively arranged at the head end and the tail end of the reactor body; the atomization device is mounted above the reactor body and close to the head end, the atomization device is used for conveying a catalyst reacting with steel slag into the reactor body, and the rotation driving mechanism is used for driving the stirring assembly to rotate so as to drive the stirring assembly to uniformly mix the steel slag and the catalyst for reaction and convey the catalyst in the axial direction; the dust removal device is mounted above the reactor body and close to the tail end, and the dust removal device is used for treating and discharging dust-containing waste gas generated after the reaction of the steel slag in the reactor body. According to the equipment, rapid carbonization of the steel slag can be achieved, the water consumption is reduced, efficient, high-quality and large-scale utilization of the steel slag is achieved, the comprehensive utilization rate of resources is increased, and meanwhile carbon emission is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of gas processing, and specifically relates to a steel slag carbon capture device and process method. Background Art

[0002] Steel slag is a solid waste generated during the steel production process. Its generation rate is 8% to 15% of crude steel production. It is rich in calcium, iron, silicon, magnesium, aluminum, manganese and other elements, and has a high resource utilization value. However, the actual resource utilization level is not high. There are three reasons: first, it has high hardness and poor grindability, which leads to high cost in processing and preparing powder; second, the minerals in steel slag (C 2 S.C. 2 F)Dense crystal structure and high activity C 2 S.C. 3 The low content of S minerals results in low hydration activity of steel slag; thirdly, there is a small amount of f-CaO and f-MgO in the steel slag, which cause volume expansion after hydration and cause volume stability problems.

[0003] As a by-product of steel production, steel slag has a huge stock and is difficult to handle. Traditional treatment methods have many disadvantages, such as occupying land and polluting the environment. Steel slag carbonization technology is an emerging treatment method, but the existing reaction equipment has problems such as low reaction efficiency, unstable product quality, high energy consumption and poor equipment durability. There is an urgent need to develop new equipment. Summary of the invention

[0004] The purpose of this application is to provide a steel slag carbon capture device and process method to achieve rapid carbonization of steel slag, improve the utilization efficiency of steel slag, reduce carbon emissions, and reduce environmental pollution.

[0005] In order to achieve the above objectives, the present application provides, on one hand, a steel slag carbon capture device, comprising:

[0006] A gas-solid reactor comprises a reactor body and a feeding mechanism and a rotary drive mechanism respectively arranged at the head end and the tail end of the reactor body, wherein the feeding mechanism is used to feed the steel slag material into the reactor body, and a stirring assembly is arranged in the axial direction of the reactor body;

[0007] an atomizing device, installed above the reactor body and arranged near the head end, the atomizing device is used to transport the catalyst that reacts with the steel slag into the reactor body, and the rotary drive mechanism is used to drive the stirring assembly to rotate, so as to drive the steel slag and the catalyst in the reactor body to mix and react and transport them axially;

[0008] The dust removal device is installed above the reactor body and arranged near the tail end. The dust removal device is used to process and discharge the dust-containing waste gas generated after the steel slag reaction in the reactor body.

[0009] In some embodiments, the stirring assembly comprises:

[0010] A stirring shaft, which penetrates the reactor body in the axial direction, wherein the tail end of the stirring shaft is connected to the rotary drive mechanism for rotational driving; and installed on the outer periphery of the stirring shaft:

[0011] A stirring wing, wherein the stirring wing is in a plurality and is arranged at intervals along the axial direction of the stirring shaft;

[0012] Partitions, the number of the partitions is multiple and they are respectively arranged close to the corresponding stirring wings, each of the partitions is located at the front end of the corresponding stirring wing along the material conveying direction, and an airflow blocking space is formed between any two adjacent partitions.

[0013] In some embodiments, the stirring wing includes a rake rod extending in a radial direction and a rake plate installed at an end of the rake rod away from the stirring shaft, and a deflection angle of the rake plate ranges from 4° to 6°.

[0014] In some embodiments, the feeding mechanism comprises:

[0015] A feed pipe is connected to the head end of the reactor body, the stirring shaft extends from the reactor body into the feed pipe, and a first spiral blade is arranged in the feed pipe and wound around the stirring shaft;

[0016] A feeding pipe is connected to the top of the feeding pipe, and one end of the feeding pipe away from the feeding pipe is provided with a feeding port for feeding steel slag material.

[0017] In some embodiments, a second spiral blade is further wound around the stirring shaft, the outer diameter of the second spiral blade is greater than the outer diameter of the first spiral blade, and the second spiral blade is arranged close to the rear end of the reactor body.

[0018] In some embodiments, the atomizing device comprises:

[0019] An atomizing tank, with a reaction heat source installed on the top and capable of filling the atomizing tank with heat source;

[0020] The catalyst storage tank stores the catalyst inside and is used to transport the catalyst to the atomization tank for atomization reaction.

[0021] In some embodiments, the dust removal device comprises:

[0022] An air outlet pipe connected to the upper end of the reactor body and arranged corresponding to the position of the second spiral blade;

[0023] A dust removal fan is installed at one end of the air outlet pipe away from the reactor body.

[0024] In some embodiments, the steel slag carbon capture device further comprises a discharge pipe disposed below the reactor body, the discharge pipe being disposed corresponding to the position of the second spiral blade, and the discharge pipe being used to discharge reacted materials from the reactor body.

[0025] In some embodiments, a plurality of nitrogen blowing interfaces are provided at intervals below the reactor body, and the ends of the plurality of nitrogen blowing interfaces facing away from the reactor body are connected to a connecting pipe, the connecting pipe is connected to an external nitrogen supply device, and the plurality of nitrogen blowing interfaces are located between the discharge pipe and the head end of the reactor body.

[0026] A second aspect of the present application provides a steel slag carbon capture process method, which is applied to the steel slag carbon capture device as described above. The steel slag carbon capture process method comprises the following steps:

[0027] S10: opening the feeding mechanism and the atomizing device so that the slag material and the catalyst are simultaneously transported into the reactor body from the head end;

[0028] S20: starting the rotary drive mechanism to rotate the stirring assembly to stir and mix the slag material and the catalyst and transport them to the tail end of the reactor body;

[0029] S30: opening a dust removal device to receive the dust-containing waste gas discharged from the reactor body after the reaction, and performing dust removal treatment on the dust-containing waste gas through the dust removal device until the dust-containing waste gas meets the emission standard and is discharged.

[0030] Through the above technical solution, the steel slag carbon capture equipment and process provided in the embodiment of the present application have the following beneficial effects:

[0031] The steel slag carbon capture equipment of the present application includes a gas-solid reactor, an atomizing device and a dust removal device; the gas-solid reactor includes a reactor body and a feeding mechanism and a rotary drive mechanism respectively arranged at the head end and the tail end of the reactor body, the feeding mechanism is used to put the steel slag material into the reactor body, and a stirring assembly is axially arranged in the reactor body; the atomizing device is installed above the reactor body and arranged near the head end, the atomizing device is used to transport the catalyst that reacts with the steel slag in the reactor body, and the rotary drive mechanism is used to drive the stirring assembly to rotate, so as to drive the stirring assembly in the reactor body to mix the steel slag and the catalyst and transport them axially; the dust removal device is installed above the reactor body and arranged near the tail end, and the dust removal device is used to treat and discharge the dust-containing waste gas generated after the steel slag reaction in the reactor body. The present application adopts a new internal structure of the reactor and a special layout to ensure that the steel slag is fully mixed with carbon dioxide, water, etc., so as to improve the uniformity of the reaction. In addition, it can achieve normal temperature, normal pressure, and low CO2 The rapid carbonization of steel slag under high concentration conditions reduces water consumption and realizes heat transfer, mass transfer and chemical reaction of gas, liquid and solid phases. In addition, by using steel slag as CO 2 Mineralized raw materials can convert unstable components in steel slag into carbonates, while achieving CO 2 Dual benefits of emission reduction and stable utilization of steel slag.

[0032] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0034] Figure 1 It is a schematic diagram of the main view of the steel slag carbon capture equipment of the present application;

[0035] Figure 2 It is a schematic diagram of the main view of the gas-solid reactor in the steel slag carbon capture equipment of the present application;

[0036] Figure 3 It is a schematic top view of the gas-solid reactor in the steel slag carbon capture equipment of the present application.

[0037] Description of Reference Numerals

[0038] 100 Gas-solid reactor 18 Nitrogen injection interface

[0039] 10 Rotation drive mechanism 19 Reactor body

[0040] 11 Stirring assembly 200 Atomizing device

[0041] 12 Stirring shaft 20 Atomizing tank

[0042] 13 Stirring fins 21 Catalyst storage tank

[0043] 131 Rake bar 300 Dust removal device

[0044] 132 rake plate 30 air outlet pipe

[0045] 14 partition 31 dust removal fan

[0046] 15 First spiral blade 400 Feeding mechanism

[0047] 16 Second spiral blade 41 Feed pipe

[0048] 17 Discharge pipe 42 Feed pipe DETAILED DESCRIPTION

[0049] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0050] The steel slag carbon capture equipment and process according to the present application are described below with reference to the accompanying drawings.

[0051] Since the steel manufacturing industry is one of the largest sources of carbon dioxide emissions, the steel industry emits about 3.8 billion tons of carbon dioxide throughout the year, accounting for 7% of global anthropogenic carbon dioxide emissions. Steel slag is the main solid waste generated in the production of pig iron and crude steel in steel plants, with an annual output of about 2.4 million tons. The composition of CaO and MgO in steel slag is 30% to 60% and 3% to 15% respectively, and the rest is mainly Fe 2 O 3 (3%~9%), SiO 2 (10%~20%) and Al 2 O (31% to 18%). The mineral components of steel slag mainly include tricalcium silicate (C 3 S), dicalcium ferrite (C 2 F), dicalcium silicate (C 2 S), reverse RO phase, free CaO and forsterite. At present, steel slag is mainly used as a building material, but its stability needs to be considered. For example, free CaO and MgO may cause expansion and cracking of concrete, and the dissolution of heavy metals such as vanadium and chromium may pollute groundwater.

[0052] In view of this, if Figure 1 As shown, the present application provides a steel slag carbon capture device, including a gas-solid reactor 100, an atomizing device 200 and a dust removal device 300; the gas-solid reactor 100 includes a reactor body 19 and a feeding mechanism 400 and a rotary drive mechanism 10 respectively arranged at the head end and the tail end of the reactor body 19, the feeding mechanism 400 is used to put the steel slag material into the reactor body 19, and a stirring assembly 11 is axially arranged in the reactor body 19; the atomizing device 200 is installed above the reactor body 19 and arranged near the head end, the atomizing device 200 is used to transport the catalyst that reacts with the steel slag in the reactor body 19, and the rotary drive mechanism 10 is used to drive the stirring assembly 11 to rotate, so as to drive the stirring assembly 11 in the reactor body 19 to mix the steel slag and the catalyst and transport them axially; the dust removal device 300 is installed above the reactor body 19 and arranged near the tail end, and the dust removal device 300 is used to treat and discharge the dust-containing exhaust gas generated after the steel slag reaction in the reactor body 19.

[0053] In this embodiment, when the steel slag needs to be processed, the steel slag to be reacted is added to the reactor body 19 through the feeding mechanism 400, and the catalyst is added to the reactor body 19 through the atomizing device 200, so that the catalyst and the steel slag undergo a carbonization reaction in the reactor body 19. Since a stirring assembly 11 is provided in the reactor body 19, when the stirring assembly 11 rotates, it can stir the catalyst and the steel slag while driving the material toward the tail end of the reactor body 19, so that the carbonized steel slag material in the reactor body 19 is discharged at the tail end of the reactor body 19, and the dust-containing exhaust gas generated after the reaction is subjected to dust treatment by the dust removal device 300, and the treated dust is discharged in compliance with the emission standards. The present application adopts a new internal structure of the reactor and a special layout to ensure that the steel slag is fully mixed with carbon dioxide, water, etc., so as to improve the uniformity of the reaction. In addition, it can achieve normal temperature, normal pressure, and low CO 2 The rapid carbonization of steel slag under high concentration conditions reduces water consumption and realizes heat transfer, mass transfer and chemical reaction of gas, liquid and solid phases. In addition, by using steel slag as CO 2 Mineralized raw materials can convert unstable components in steel slag into carbonates, while achieving CO 2 Dual benefits of emission reduction and stable utilization of steel slag.

[0054] In some embodiments, the stirring assembly 11 includes a stirring shaft 12, and stirring wings 13 and partitions 14 installed on the outer periphery of the stirring shaft 12; the stirring shaft 12 axially penetrates the reactor body 19, and the tail end of the stirring shaft 12 is connected to the rotating drive mechanism 10 for rotation; the number of stirring wings 13 is multiple and they are arranged at intervals along the axial direction of the stirring shaft 12; the number of partitions 14 is multiple and they are respectively arranged close to the corresponding stirring wings 13, each partition 14 is located at the front end of the corresponding stirring wing 13 along the material conveying direction, and an airflow blocking space is formed between any two adjacent partitions 14.

[0055] In the present application, the rotary drive mechanism 10 can be a rotary drive structure of a rotary drive motor, and the output shaft of the rotary drive motor is connected to the tail end of the stirring shaft 12, so that the stirring shaft 12 can be driven to rotate when the rotary drive motor is started. When the steel slag is added to the reactor body 19 via the feeding mechanism 400, and the catalyst enters the reactor body 19 via the atomizing device 200, after the steel slag and the catalyst enter the reactor body 19, the stirring shaft 12 rotates so that the material can be brought in along the axial direction, and the steel slag and the catalyst are stirred and scattered and lifted by the stirring wings 13 in the reactor body 19. Among them, the stirring wings 13 are spirally distributed on the stirring shaft 12, and can drive the material to be pushed axially toward the tail of the reactor body 19 while breaking up the material. Since the speed of the stirring shaft 12 is adjustable, the walking time of the steel slag and the catalyst in the reactor body 19 is controllable and adjustable, so that the 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 material at the tail discharge port of the reactor body 19.

[0056] In addition, in order to prevent the steel slag from moving too fast toward the tail end with the air flow in the reactor body 19, a partition 14 is provided at the position of the stirring fin 13, and the number of the partitions 14 is less than the number of the stirring fins 13; Figure 2 As shown, partitions 14 are installed at the positions of several stirring wings 13 selected from the upper row of multiple stirring wings 13, so that a blocking space for blocking airflow is formed between any two adjacent partitions 14 to prevent the slag from moving too fast and causing incomplete reaction. In addition, multiple airflow blocking spaces can also ensure that the lifted raw materials can settle due to weight and fall into the position of the stirring shaft 12 to be spirally sent out.

[0057] In some embodiments, the stirring wing 13 includes a rake rod 131 extending radially and a rake plate 132 installed at the end of the rake rod 131 away from the stirring shaft 12, and the deflection angle range of the rake plate 132 is 4° to 6°. By setting the rake plate 132 in a deflectable structure, the reaction mixing uniformity of the catalyst and the steel slag can be improved, and the catalyst and the steel slag can be assisted in breaking up. In order to prevent the deflection angle of the rake plate 132 from being too large and weakening the breaking up effect, the deflection angle range of the rake plate 132 is optimized to 4° to 6° to achieve the best mixing effect.

[0058] In some embodiments, the feeding mechanism 400 includes a feeding pipe 41 and a feeding pipe 42; the feeding pipe 41 is connected to the head end of the reactor body 19, the stirring shaft 12 extends from the reactor body 19 into the feeding pipe 41, a first spiral blade 15 is provided in the feeding pipe 41, and the first spiral blade 15 is wound around the stirring shaft 12; the feeding pipe 42 is connected to the top of the feeding pipe 41, and the end of the feeding pipe 42 facing away from the feeding pipe 41 has a feeding port for feeding steel slag material.

[0059] When the steel slag enters the feed pipe 41 from the feed port of the feed pipe 42, the first spiral blade 15 is provided on the stirring shaft 12, so that the first spiral blade 15 can spiral the steel slag material in the feed pipe 41 into the reactor body 19, so as to transport and mix the steel slag material in the reactor body 19, thereby achieving smooth entry of the steel slag material. The steel slag is powdered steel slag ground to 300 meshes and is added through the feed port.

[0060] In some embodiments, a second spiral blade 16 is further wound around the stirring shaft 12, the outer diameter of the second spiral blade 16 is larger than the outer diameter of the first spiral blade 15, and the second spiral blade 16 is arranged near the tail end of the reactor body 19. In this embodiment, by setting the outer diameter of the first spiral blade 15 to be smaller than the outer diameter of the second spiral blade 16, the reacted material to be output at the tail end of the reactor body 19 can be quickly discharged through the spiral of the second spiral blade 16, and the steel slag material put at the head end of the reactor body 19 can slowly enter the reactor body 19 through the spiral of the first spiral blade 15, so as to prevent incomplete reaction of the material inside the reactor body 19 or congestion of the material.

[0061] In some embodiments, the atomization device 200 includes an atomization tank 20 and a catalyst storage tank 21; a reaction heat source is installed on the top of the atomization tank 20 and can add heat source to the atomization tank 20. In addition, the top of the atomization tank 20 is the steel plant purified waste gas inlet, and the steel plant's purified waste gas (carbon dioxide content is about 20%, flue gas temperature is about 90°C~100°C) is directly introduced into the atomization tank 20 through the waste gas inlet through a pipeline, and the waste gas is heated by the added heat source to improve the mixing uniformity of the waste gas and the catalyst; the catalyst storage tank 21 stores the catalyst inside and is used to transport the catalyst to the atomization tank 20 for atomization reaction.

[0062] Among them, the catalyst storage tank 21 is located on the side of the atomizing tank 20 and has a catalyst agent inlet. The catalyst is a weak alkaline liquid, which is configured with water in a ratio of 1:19 and sprayed through the atomizer nozzle. The prepared catalyst dosage is 70kg / 1t steel slag, and the addition flow rate and pressure are regulated by the ball valve. The purified waste gas and the catalyst liquid are evenly mixed in the atomizing tank 20 to form a waste gas containing the catalyst, which enters the reactor body 19 to wait for reaction with the steel slag. When the waste gas containing the catalyst and the steel slag in the atomizing tank 20 enter the reactor body 19, the gas and solid materials have the same direction. The powdered steel slag is stirred and lifted by the stirring wings 13 in the reactor body 19, and fully contacts and reacts with the waste gas containing the catalyst, thereby realizing the rapid carbonization treatment of the steel slag, reducing the water consumption in the reaction process, and realizing the heat transfer, mass transfer, and chemical reaction of the three phases of gas, liquid, and solid, improving the utilization efficiency of the steel slag and reducing carbon emissions, and reducing environmental pollution.

[0063] In this embodiment, by using purified exhaust gas, catalyst and steel slag for carbonization reaction, it is possible to overcome the problem of high water consumption in traditional wet carbonization (water-to-solid ratio greater than 5), control the humidity environment of the carbonization reaction, and use less than 5% of the amount of water used in the powder, and gradually evaporate during flue gas carbonization.

[0064] In some embodiments, the dust removal device 300 includes an air outlet pipe 30 and a dust removal fan 31; the air outlet pipe 30 is connected to the upper end of the reactor body 19 and is arranged corresponding to the position of the second spiral blade 16; the dust removal fan 31 is installed at the end of the air outlet pipe 30 away from the reactor body 19. After the steel slag completes the carbonization reaction in the reactor body 19, the dust-containing waste gas after the reaction is completed is led to the dust collector through the dust removal fan 31 through the air outlet pipe 30 for dust removal treatment, and the treated dust-containing waste gas is led to the exhaust pipe through the pipeline to meet the discharge standards.

[0065] In some embodiments, the steel slag carbon capture device further includes a discharge pipe 17 disposed below the reactor body 19, the discharge pipe 17 is disposed corresponding to the position of the second spiral blade 16, and the discharge pipe 17 is used to discharge the reacted material from the reactor body 19. A plate plug valve is also disposed on the discharge pipe 17, and the reacted material is brought to the tail of the reactor body 19 by the stirring wing 13 in the reactor body 19. Since a large-diameter second spiral blade 16 is disposed at the tail of the reactor body 19, when discharge is required, the plate plug valve is opened, and the material passes through the spiral discharge of the second spiral blade 16 to output the material from the discharge pipe 17. When the discharge is completed, the plate plug valve can be closed.

[0066] After the entire steel slag carbon capture equipment has been running for a period of time, it needs to be cleaned. Therefore, a plurality of nitrogen blowing interfaces 18 are arranged at intervals below the reactor body 19. The ends of the plurality of nitrogen blowing interfaces 18 facing away from the reactor body 19 are all connected to a connecting pipe, and the connecting pipe is connected to an external nitrogen supply device. The plurality of nitrogen blowing interfaces 18 are all located between the discharge pipe 17 and the head end of the reactor body 19.

[0067] Preferably, if Figure 2 and Figure 3 As shown, there are five nitrogen injection interfaces 18, which are distributed at the head end, tail end and middle section of the reactor body 19. When cleaning the equipment, a large amount of nitrogen is delivered to each nitrogen injection interface 18 through a connecting pipe by an external nitrogen supply device, and the nitrogen is injected into the reactor body 19 through the nitrogen injection interface 18 to clean 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 pipe 30 at the tail of the reactor body 19 for treatment and then meets the discharge standards.

[0068] In addition, the internal cross-sectional area of ​​the reactor body 19 needs to be much larger than the cross-sectional area of ​​each external pipeline, so as to effectively stabilize the pressure and reduce the speed of the gas flow and prevent a large amount of powdered raw materials from being carried out of the reactor body 19 by the gas.

[0069] The second aspect of the present application provides a steel slag carbon capture process method, which is applied to the steel slag carbon capture equipment as described above. The steel slag carbon capture process method comprises the following steps:

[0070] S10: Open the feeding mechanism 400 and the atomizing device 200 so that the slag material and the catalyst are simultaneously transported into the reactor body 19 from the head end;

[0071] S20: Turn on the rotary drive mechanism 10 to rotate the stirring assembly 11 to stir and mix the slag material and the catalyst and transport them to the rear end of the reactor body 19;

[0072] S30: Open the dust removal device 300 to receive the dust-containing waste gas discharged from the reactor body 19 after the reaction, and remove the dust-containing waste gas through the dust removal device 300 until the dust-containing waste gas meets the emission standard and is discharged.

[0073] In this embodiment, when it is necessary to carbonize the steel slag, the feeding mechanism 400 and the atomizing device 200 are first opened simultaneously, the steel slag material is added into the reactor body 19 via the feeding mechanism 400, and the catalyst is added into the reactor body 19 via the atomizing device 200. Under the rotation of the stirring component 11, the steel slag and the catalyst are mixed and reacted in the reactor body 19 while being transported toward the tail end of the reactor body 19; during the reaction, the rotation speed of the stirring component 11 is adjusted to ensure that the steel slag reaching the tail end of the reactor body 19 has completed the carbonization reaction, and the dust removal device 300 collects the dust-containing waste gas discharged from the reactor body 19 and treats it until it meets the emission standards for discharge. The present application optimizes the process and structure to ensure that the steel slag is fully mixed with carbon dioxide, water, etc., improve the uniformity of the reaction, and achieve normal temperature, normal pressure, and low CO 2 Rapid carbonization of steel slag under concentration conditions reduces water consumption and realizes heat transfer, mass transfer and chemical reaction of gas, liquid and solid three phases.

[0074] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A steel slag carbon capture device, characterized in that: include: A gas-solid reactor (100) comprises a reactor body (19) and a feeding mechanism (400) and a rotary drive mechanism (10) respectively arranged at the head end and the tail end of the reactor body (19), wherein the feeding mechanism (400) is used to feed steel slag material into the reactor body (19), and a stirring assembly (11) is arranged in the reactor body (19) along the axial direction; an atomizing device (200) installed above the reactor body (19) and arranged near the head end, the atomizing device (200) being used to transport the catalyst for reacting with the steel slag into the reactor body (19), the rotary drive mechanism (10) being used to drive the stirring assembly (11) to rotate, so as to drive the steel slag and the catalyst in the reactor body (19) to mix and react and transport them in the axial direction; The dust removal device (300) is installed above the reactor body (19) and arranged near the tail end. The dust removal device (300) is used to process and discharge the dust-containing waste gas generated after the steel slag reaction in the reactor body (19).

2. The steel slag carbon capture equipment according to claim 1, characterized in that: The stirring assembly (11) comprises: A stirring shaft (12) axially penetrates the reactor body (19), the tail end of the stirring shaft (12) being connected to the rotary drive mechanism (10) for rotational driving; and mounted on the outer periphery of the stirring shaft (12): A stirring wing (13), wherein the stirring wing (13) is in plurality and is arranged at intervals along the axial direction of the stirring shaft (12); Partitions (14), the number of the partitions (14) is plural and they are respectively arranged close to the corresponding stirring wings (13), each of the partitions (14) is located at the front end of the corresponding stirring wing (13) along the material conveying direction, and an airflow blocking space is formed between any two adjacent partitions (14).

3. The steel slag carbon capture equipment according to claim 2, characterized in that: The stirring wing (13) comprises a rake rod (131) extending in the radial direction and a rake plate (132) installed at the end of the rake rod (131) away from the stirring shaft (12), and the deflection angle range of the rake plate (132) is 4° to 6°.

4. The steel slag carbon capture equipment according to claim 2, characterized in that: The feeding mechanism (400) comprises: A feed pipe (41) is connected to the head end of the reactor body (19), the stirring shaft (12) extends from the reactor body (19) into the feed pipe (41), and a first spiral blade (15) is provided in the feed pipe (41) and is wound around the stirring shaft (12); The feeding pipe (42) is connected to the upper part of the feeding pipe (41), and the end of the feeding pipe (42) away from the feeding pipe (41) is provided with a feeding port for feeding the steel slag material.

5. The steel slag carbon capture equipment according to claim 4, characterized in that: A second spiral blade (16) is also wound around the stirring shaft (12). The outer diameter of the second spiral blade (16) is greater than the outer diameter of the first spiral blade (15). The second spiral blade (16) is arranged close to the rear end of the reactor body (19).

6. The steel slag carbon capture equipment according to any one of claims 1 to 5, characterized in that: The atomizing device (200) comprises: An atomizing tank (20) having a reaction heat source installed on the top thereof and capable of filling the atomizing tank (20) with a heat source; The catalyst storage tank (21) stores the catalyst therein and is used to transport the catalyst to the atomization tank (20) for atomization reaction.

7. The steel slag carbon capture equipment according to claim 5, characterized in that: The dust removal device (300) comprises: An air outlet pipe (30) connected to the upper end of the reactor body (19) and arranged corresponding to the position of the second spiral blade (16); A dust removal fan (31) is installed at one end of the air outlet pipe (30) away from the reactor body (19).

8. The steel slag carbon capture equipment according to claim 5, characterized in that: The steel slag carbon capture device also includes a discharge pipe (17) arranged below the reactor body (19), and the discharge pipe (17) is arranged corresponding to the position of the second spiral blade (16). The discharge pipe (17) is used to discharge the reacted material from the reactor body (19).

9. The steel slag carbon capture equipment according to claim 8, characterized in that: A plurality of nitrogen blowing interfaces (18) are arranged at intervals below the reactor body (19); the ends of the plurality of nitrogen blowing interfaces (18) facing away from the reactor body (19) are all connected to a connecting pipe, and the connecting pipe is connected to an external nitrogen supply device; the plurality of nitrogen blowing interfaces (18) are all located between the discharge pipe (17) and the head end of the reactor body (19).

10. A steel slag carbon capture process, characterized in that: Applied to the steel slag carbon capture equipment according to any one of claims 1 to 9, the steel slag carbon capture process method comprises the steps of: S10: opening the feeding mechanism (400) and the atomizing device (200) so that the slag material and the catalyst are simultaneously transported into the reactor body (19) from the head end; S20: starting the rotary drive mechanism (10) to rotate the stirring assembly (11) to stir and mix the slag material and the catalyst and transport them to the rear end of the reactor body (19); S30: Open the dust removal device (300), receive the dust-containing waste gas discharged from the reactor body (19) after the reaction, and remove the dust-containing waste gas through the dust removal device (300) until the dust-containing waste gas meets the emission standard and is discharged.

Images