A tray-type carbon capture and storage reaction system

Abstract

The present invention discloses a tray-type carbon capture and storage reaction system, which relates to the field of environmental protection and includes a reaction tower, a pulping machine, a slurry pump, a microbubble generator and a Roots blower. A number of tray mechanisms capable of controlling the gas diffusion amount and diffusion rate according to the slurry flow rate are installed in the reaction tower from top to bottom. The slurry with suitable viscosity prepared in the pulping machine is input into the interior of the tower from the bottom slurry inlet of the reaction tower. The present invention adopts a mode with a tray-type reaction tower as the main reaction and a microbubble generator as the auxiliary to absorb carbon dioxide. Compared with a bubble column of the same volume, the slurry volume is small and the required gas is also less. When the slurry passes through the tray mechanism of the reaction tower, the overflow amount of the reaction gas can be adapted according to the flow rate of the slurry, so that the slurry is always in contact reaction with a sufficient amount of reaction gas, avoiding that excessive reaction gas contacts the slurry and cannot react fully, resulting in the gas entraining a certain amount of mist.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, and particularly to a tray-type carbon capture and storage reaction system. Background Art

[0002] The carbon sequestration and alkalinity reduction reaction refers to the process of fixing carbon dioxide through chemical reactions during industrial or natural processes, while simultaneously reducing the alkalinity of the solution. Such reactions usually involve acid-base neutralization reactions and the formation of carbonates or bicarbonates, and are a means of reducing the concentration of carbon dioxide in the atmosphere, lowering the pH value, and improving environmental quality.

[0003] The fine particulate waste generated after burning coal in a coal-fired power plant mainly consists of components such as silicon dioxide, aluminum oxide, iron oxide, and calcium oxide. The carbon sequestration and alkalinity reduction reaction using fly ash refers to the chemical reaction of the active components in fly ash with carbon dioxide, which not only fixes carbon dioxide but also reduces the alkalinity of fly ash, thereby reducing its potential negative impact on the environment. In traditional methods, a bubbling tower with stirring is used, which consists of a reaction tower body, a stirrer, and an air diffuser pipe. By aerating through the air diffuser pipe, gas enters the slurry to achieve gas-liquid reaction. The stirrer is used to agitate the slurry to prevent sedimentation, and the slurry is circulated through a pumping system. The slurry is pumped from the bottom of the tower to the top, mixed evenly with the upper slurry, and brought into full contact with the gas.

[0004] Obviously, there are many deficiencies. Firstly, the bubbling tower is large in volume, so the gas consumption is also large, and a large amount of gas is required for the reaction. The liquid level of the bubbling tower is high, and the bubbles will gradually grow larger during the rising process, resulting in a smaller gas-liquid contact area and a lower mass transfer efficiency. At the same time, a large amount of gas is likely to enter the pumping system along with the slurry, affecting the pumping efficiency of the pump and thus the overall reaction efficiency. Moreover, the bubbles are extremely likely to entrain mist to affect the operation of subsequent processes. Summary of the Invention

[0005] The purpose of the present invention is to provide a tray-type carbon capture and storage reaction system to solve the problems presented in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A tray-type carbon capture and storage reaction system, including a reaction tower, a pulping machine, a slurry pump, a microbubble generator and a Roots blower. In the reaction tower, a number of tray mechanisms capable of controlling the gas diffusion amount and diffusion rate according to the slurry flow rate are installed from top to bottom. The slurry with suitable viscosity prepared in the pulping machine is input into the interior of the tower from the bottom slurry inlet of the reaction tower. The outlet at the bottom of the reaction tower is communicated between the slurry pump and the microbubble generator respectively. The slurry is transported from the bottom of the reaction tower to the top of the reaction tower through the slurry pump, and flows through the tray mechanisms from top to bottom in turn. The reaction gas is input from the bottom of the reaction tower through the Roots blower, enters the slurry through the aeration pipe installed at the bottom of the reaction tower, and then passes through the tray mechanisms from bottom to top in turn to react with the slurry in contact. A part of the remaining reaction gas is refluxed from the top of the reaction tower to the Roots blower for circulation, and the other part is transported to the microbubble generator to be mixed with the slurry to generate slurry carrying bubbles and enter the reaction tower to participate in the circulation.

[0007] Preferably, the tray mechanism includes a tray. A number of outer cover assemblies are equidistantly distributed on the upper end surface of the tray. The outer cover assembly includes a main body outer cover and a riser pipe. The riser pipe is installed through the tray. Triangular tooth holes are equidistantly distributed on the upper end surface of the riser pipe. A rotating shaft member is rotatably connected to the upper end surface of the main body outer cover. The bottom end part of the rotating shaft member is threadedly connected with a top cover part. Triangular plates corresponding to the number of the triangular tooth holes are fixedly connected equidistantly on the lower end surface of the top cover part. Each triangular plate is respectively slidably connected in the corresponding triangular tooth hole. Strip-shaped holes are penetrated and equidistantly distributed on the outer side end surface of the main body outer cover. A guide frame is fixedly installed in each strip-shaped hole.

[0008] Preferably, elastic spiral guide plates are equidistantly distributed along the side wall in the inner cavity of the riser pipe. The head end and the tail end of the elastic spiral guide plate are respectively fixedly connected with connecting parts. One end of the connecting part close to the center position of the riser pipe is fixedly connected with a fixed disk. The connecting part at the tail end is fixedly connected with an installation ring. The installation ring is fixedly connected in the inner cavity of the riser pipe. The connecting part at the head end is slidably connected to the side wall of the inner cavity of the riser pipe. A fixed column is fixedly connected to the fixed disk at the head end position. The upper end of the fixed column is fixedly connected to the bottom end of the top cover part.

[0009] Preferably, a hollow cover is fixedly sleeved on the rotating shaft member, and a baffle ear is fixedly connected to the hollow cover.

[0010] Preferably, the strip-shaped hole is inclined, and the inclination angle is set at 15 - 5°.

[0011] Preferably, raised portions are respectively provided at the edges of the upper end surface of the tray, and a slurry inlet and a slurry outlet are formed on the left and right sides between the two raised portions.

[0012] Preferably, a sight glass with a neck is installed between two adjacent tray mechanisms on the outer side of the reaction tower.

[0013] Preferably, the viscosity of the slurry prepared in the pulper is controlled between 3500 - 5000 cP.

[0014] Preferably, a demister is installed at the top of the reaction tower.

[0015] Preferably, it includes controlling the input flow rates of the slurry and the reaction gas to achieve the linkage adjustment and precise control of the slurry input and gas input, and maximizing the mass transfer efficiency. The specific steps are as follows:

[0016] Step 1: Install an on-line viscosity sensor to monitor the viscosity of the slurry output by the pulper in real time, and combine it with the preset viscosity range (3500 - 5000 cP) to automatically adjust the solid-liquid mixing ratio and stirring rate in the pulper to ensure that the fluidity of the slurry meets the requirements.

[0017] Step 2: Set a liquid level sensor at the bottom of the reaction tower, adjust the slurry output of the slurry pump according to the feedback signal of the slurry liquid level height at the bottom of the tower to maintain the stability of the slurry circulation volume in the tower, and then dynamically adjust the rotation speed of the pump according to the slurry circulation demand in the reaction tower to precisely control the input of the slurry.

[0018] Step 3: Install a gas flow meter and a pressure sensor at the bottom of the reaction tower to monitor the input amount of the reaction gas and the pressure in the tower. Install displacement sensors in the outer cover components of each tray mechanism to feedback the position of the top cover in real time, so as to receive the opening degree information of the triangular tooth holes. When the opening of the triangular tooth holes expands, correspondingly increase the input flow rate of the reaction gas, thereby reversely calibrating the gas supply volume of the Roots blower to achieve the refined control of the gas flow rate.

[0019] Step 4: According to the opening degree information of the triangular tooth holes, the slurry liquid level height data at the bottom of the tower, the slurry input amount of the pump, the pressure data in the tower, and the flow rate data of the reaction gas, etc., perform a fuzzy logic algorithm to achieve the dynamic balance control of the slurry and gas in the reaction tower.

[0020] Preferably, the reflux gas in the demister at the top of the tower is monitored in real time. When the reflux gas decreases, synchronously reduce the gas distribution ratio in the microbubble generator to further reduce the comprehensive energy consumption.

[0021] In summary, the beneficial effects of the present invention are:

[0022] 1. The present invention absorbs carbon dioxide by using a tray-type reaction tower as the main reaction and a microbubble generator as the auxiliary. Compared with a bubble column of the same volume, the slurry volume is small and the required gas is also less. When the slurry is pressurized by a pump and passes through the microbubble generator, the high-speed slurry creates a negative pressure area in the microbubble generator, sucking the gas into the device and then releasing it, causing the bubbles to burst into micro-nano bubbles, further increasing the gas-liquid mass transfer area. At the same time, during this process, the slurry is stirred by the impeller of the slurry pump, and alkaline substances are precipitated, absorbing more carbon dioxide and increasing the carbon fixation amount.

[0023] 2. When the slurry passes through the tray mechanism of the reaction tower, it can adapt the overflow amount of the reaction gas according to the flow rate of the slurry, allowing the slurry to always contact and react with a sufficient amount of reaction gas, avoiding excessive reaction gas contacting the slurry and not fully reacting, resulting in the gas entraining a certain amount of mist and entering the upper tray mechanism. At the same time, when the reaction gas enters the riser pipe, the elastic spiral deflector can also be used to reduce the mist entrainment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall process structure of a tray-type carbon capture and storage reaction system of the present invention;

[0026] Figure 2 It is a schematic diagram of the partial structure of the reaction tower in a tray-type carbon capture and storage reaction system of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the tray mechanism in a tray-type carbon capture and storage reaction system of the present invention;

[0028] Figure 4 It is a top view structure schematic diagram of the tray mechanism in a tray-type carbon capture and storage reaction system of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the outer cover assembly in a tray-type carbon capture and storage reaction system of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the riser pipe and the top cover part in a tray-type carbon capture and storage reaction system of the present invention;

[0031] Figure 7Schematic structural diagram of the strip-shaped hole in a tray-type carbon capture and storage reaction system of the present invention;

[0032] Figure 8 Schematic unfolded structural diagram of the riser pipe and the top cover part in a tray-type carbon capture and storage reaction system of the present invention;

[0033] Figure 9 Schematic top view structural diagram of the riser pipe in a tray-type carbon capture and storage reaction system of the present invention;

[0034] Figure 10 Schematic bottom view structural diagram of the riser pipe in a tray-type carbon capture and storage reaction system of the present invention.

[0035] The reference signs in the drawings are described separately as follows: reaction tower 1; pulper 2; slurry pump 3; microbubble generator 4; Roots blower 5; sight glass with neck 6; reaction gas storage tank 7; tray 10; convex part 11; slurry outlet 12; slurry inlet 13; outer cover assembly 20; main outer cover 21; strip-shaped hole 22; guiding frame 23; hollow cover 24; rotating shaft part 25; baffle ear 26; riser pipe 27; triangular tooth hole 28; fixing column 29; top cover part 30; triangular plate 31; elastic spiral guide plate 32; connecting part 33; fixing disk 34; mounting ring 35. Detailed implementation manners

[0036] Now, the present invention will be further described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0037] To facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant accompanying drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0038] All the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0039] Any feature disclosed in this specification (including any appended claims, abstract and drawings) can be replaced by other equivalent or alternative features with a similar purpose, unless specifically stated. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0040] In the present invention, unless otherwise clearly defined and limited, terms such as "install", "connect", "link", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside at least two elements or the interaction relationship between at least two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The following combines Figures 1 - 10 A detailed description of the present invention is provided. An embodiment provided by the present invention is: a tray-type carbon capture and storage reaction system, including a reaction tower 1, a pulper 2, a slurry pump 3, a microbubble generator 4 and a Roots blower 5. Among them, ten groups of tray mechanisms capable of controlling the gas diffusion amount and diffusion rate according to the slurry flow rate are installed in the reaction tower 1 from top to bottom. The slurry inlet at the bottom of the reaction tower 1 is communicated with the pulper 2, and the pulper 2 is fed through a screw conveyor and a water pump in a certain proportion. The pulper 2 makes pulp, and the viscosity of the prepared slurry is controlled between 3500-5000 cP, which can ensure good gas-liquid contact. After the pulping is completed, it is pumped into the reaction tower 1 through the pulper pump. The discharge port at the bottom of the reaction tower 1 is respectively communicated with the slurry pump 3 and the microbubble generator 4. Most of the generated slurry is transported from the bottom of the reaction tower 1 to the top of the reaction tower 1 through the slurry pump 3 and flows through the tray mechanism from top to bottom. The reaction gas is input from the reaction gas storage tank 7 into the Roots blower 5, and the air outlet end of the Roots blower 5 is communicated with the air inlet end at the bottom of the reaction tower 1, so that the reaction gas is pressurized and input into the reaction tower 1 through the Roots blower 5. An air diffuser pipe is installed at the bottom of the reaction tower 1, and the reaction gas enters the slurry through the air diffuser pipe for aeration, and then passes through the tray mechanism from bottom to top to react with the slurry in contact. After the reaction gas passes through the ten-layer tray mechanism, the remaining reaction gas is subjected to gas-liquid separation through a demister provided at the top of the reaction tower 1, and then enters the suction port of the Roots blower 5 through the exhaust pipe for gas recycling. It should be noted that when the remaining reaction gas enters the Roots blower 5 for recycling, a part of the reaction gas enters the microbubble generator 4, is mixed with the slurry to generate a slurry carrying bubbles and enters the reaction tower 1 to participate in the cycle.

[0042] Microbubble generator: Bubbles of different sizes generally exist between liquids and the liquid-solid contact surface, which play an important role in actual production applications. According to different bubble diameters, they can be divided into large bubbles, microbubbles, micro-nano bubbles, and nano bubbles. Among them, the tiny bubbles with a diameter of 0.1-50 μm are called micro-nano bubbles.

[0043] Characteristics of micro-nano bubbles: (1) Large specific surface area (2) Long existence time (3) High gas-liquid mass transfer rate (4) High gas dissolution rate

[0044] It is worth mentioning that in this embodiment, refer to Figures 3 - 6, the tray mechanism includes a tray 10, the tray 10 is fixedly installed in the inner cavity of the reaction tower 1, raised portions 11 are respectively arranged at the edges of the upper end surface of the tray 10, a slurry inlet 13 and a slurry outlet 12 are formed on the left and right sides between the two raised portions 11, and a number of outer cover assemblies 20 are equidistantly distributed on the upper end surface of the tray 10, so that the slurry enters from the slurry inlet 13, passes through the distributed outer cover assemblies 20 and exits from the slurry outlet 12, and then flows to the next layer. The outer cover assembly 20 includes a main outer cover 21 and a riser pipe 27. The riser pipe 27 is installed through the tray 10, and the reaction gas enters from below through the riser pipe 27. Triangular tooth holes 28 are equidistantly distributed on the upper end surface of the riser pipe 27. A rotating shaft member 25 is rotatably connected to the upper end surface of the main outer cover 21. A hollow cover 24 is fixedly sleeved on the rotating shaft member 25. A torsion spring is connected between the top wall of the inner cavity of the hollow cover 24 and the main outer cover 21. A baffle ear 26 is fixedly connected to the hollow cover 24. The bottom end portion of the rotating shaft member 25 is threadedly connected with a top cover portion 30. Triangular plates 31 corresponding to the number of the triangular tooth holes 28 are fixedly connected to the lower end surface of the top cover portion 30 at equal intervals. Each triangular plate 31 is respectively slidably connected in the corresponding triangular tooth hole 28. Strip-shaped holes 22 are penetrated and arranged on the outer side end surface of the main outer cover 21 at equal intervals. A guiding frame 23 is fixedly installed in each strip-shaped hole 22. The reaction gas enters from the inner cavity of the riser pipe 27, overflows outwards from the triangular tooth holes 28 at the top, and reacts with the slurry through the guiding frame 23. The guiding frame 23 can extend into the slurry to a certain distance, so that the reaction gas can better enter the slurry and react with the slurry. When the flow rate of the slurry becomes faster, the impact force of the slurry on the baffle ear 26 is greater, so that the slurry with a large flow rate will impact the baffle ear 26 to rotate, thereby driving the rotating shaft member 25 to rotate, and further causing the top cover portion 30 to move upwards. The triangular plate 31 also slides upwards accordingly, so that the opening area of the triangular tooth hole 28 becomes larger, and the amount of the reaction gas overflowing per unit time also increases. When the flow rate of the slurry increases, the overflow amount of the reaction gas is increased, so that the slurry can be fully utilized, and the contact efficiency between the slurry and the reaction gas is ensured. When the flow rate of the slurry becomes slower, the rotating shaft member 25 will reset, thereby reducing the opening area of the triangular tooth hole 28 to reduce the overflow amount of the reaction gas. After the flow rate of the slurry becomes slower, the amount of the slurry flowing through the tray mechanism per unit time also decreases. Therefore, by reducing the overflow amount of the reaction gas, it can react fully with the slurry, so as to avoid that a certain amount of mist will be entrained due to the inability of the excessive reaction gas to react fully with the slurry and enter the upper layer tray mechanism upwards. At the same time, the utilization rate of the slurry on each tray mechanism reaches the maximum. The slurry descends layer by layer through the tray mechanism, reacts fully with the gas, and finally returns to the slurry storage part at the bottom of the tower. The slurry returning to the bottom is divided into two parts,A part of the slurry is pumped to the top of the tower again by a pump, and the cycle repeats. The slurry is in sufficient contact with the gas during the process. Another part of the slurry is pressurized by a pump and then undergoes a secondary reaction through a microbubble generator. The slurry after the reaction enters the slurry storage part at the bottom of the tower.

[0045] It is worth mentioning that, in order to further reduce the entrainment of mist into the tray mechanism, referring to Figure 9 and Figure 10 In this embodiment, elastic spiral guide plates 32 are equidistantly distributed along the side wall in the inner cavity of the riser pipe 27. Connecting parts 33 are fixedly connected to the head end and the tail end of the elastic spiral guide plate 32 respectively. A fixed disk 34 is fixedly connected to one end of the connecting part 33 close to the center position of the riser pipe 27. An installation ring 35 is fixedly connected to the connecting part 33 at the tail end, and the installation ring 35 is fixedly connected in the inner cavity of the riser pipe 27. The connecting part 33 at the head end is slidably connected to the side wall of the inner cavity of the riser pipe 27. A fixed column 29 is fixedly connected to the fixed disk 34 at the head end position, and the upper end of the fixed column 29 is fixedly connected to the bottom end of the top cover part 30. When the reaction gas enters from the bottom of the riser pipe 27, the reaction gas passes through the elastic spiral guide plate 32 and spirally upward through the triangular tooth holes 28 into the main body outer cover 21. When the reaction gas passes through the elastic spiral guide plate 32, the mist entrained in the reaction gas will be subjected to a certain centrifugal force and separated from the reaction gas, thereby effectively reducing the mist entrained in the reaction gas. At the same time, when the flow rate of the slurry increases, the rotation of the rotating shaft member 25 will drive the top cover part 30 to move upward, thereby pulling the fixed column 29 upward, and then pulling the head end of the elastic spiral guide plate 32 upward. Since the tail end of the elastic spiral guide plate 32 is fixed, the pitch of the elastic spiral guide plate 32 will increase, but the total length of the elastic spiral guide plate 32 remains unchanged. At this time, the speed of the reaction gas passing through the elastic spiral guide plate 32 will be accelerated to fully react with the slurry.

[0046] It should be noted that, in order to allow the reaction gas to enter the slurry more fully, referring to Figure 5 and Figure 7 In this embodiment, the strip-shaped holes 22 are inclined, and the inclination angle is preferably set at 15 - 5°, preferably 30 degrees at the top cover part 30. The strip-shaped holes 22 are arranged along the outer circular surface of the main body outer cover 21 and inclined 30 degrees at the top cover part 30, so that the air outlet of the guide frame 23 faces obliquely downward. When the reaction gas passes through the guide frame 23, it will be injected obliquely downward into the slurry to fully react with the slurry, thereby improving the contact with the slurry and ensuring the mass transfer efficiency.

[0047] In addition, in one embodiment, for convenient observation, a sight glass with a neck 6 is installed outside the reaction tower 1 between two adjacent tray mechanisms.

[0048] During specific operation, first, a screw conveyor and a water pump are used to feed materials into the pulper 2 in a certain proportion, and the viscosity of the slurry is controlled between 3500 and 5000 cP. After pulping is completed, the slurry is pumped to the reaction tower 1 by the pulper pump. Most of the slurry in the reaction tower 1 is transported to the top of the reaction tower 1 by the slurry pump, and then descends through ten tray mechanisms from the top of the tower back to the bottom of the tower. At the same time, the reaction gas is output from the reaction gas storage tank 7, pressurized by the Roots blower 5 and sent into the reaction tower 1, and enters the slurry through the aeration pipe at the bottom. It passes through the tray mechanisms layer by layer from bottom to top in the tower, contacts and reacts with the slurry. Finally, after the reaction gas passes through the demister installed at the top of the reaction tower 1 for gas-liquid separation, it enters the suction port of the Roots blower 5 through the exhaust pipe for gas recycling. At the same time, a part of the gas is diverted into the microbubble generator 4, mixed with part of the slurry to generate a slurry carrying a large number of tiny bubbles and enters the reaction tower 1. The reaction gas in the reaction gas storage tank 7 is provided by a carbon dioxide gas cylinder. The gas first enters the reaction gas storage tank 7 to ensure stable gas supply to the reaction system. Finally, the reacted slurry is discharged through the bottom slurry discharge port.

[0049] The present invention uses a tray-type reaction tower as the main mode and a microbubble generator as the auxiliary mode. The slurry first enters the tray-type reaction tower from the top of the tower, descends layer by layer through the trays, fully contacts and reacts with the gas, and finally returns to the slurry storage part at the bottom of the tower. The slurry returning to the bottom is divided into two parts. One part is pumped to the top of the tower again by a pump, and the cycle repeats. The slurry is in full contact with the gas during the process. The other part of the slurry is pressurized by a pump and undergoes a secondary reaction through the microbubble generator. The reacted slurry enters the slurry storage part at the bottom of the tower. When the slurry passes through the tray mechanism in Reaction Tower 1, the overflow amount of the reaction gas per unit time can be controlled according to the flow rate of the slurry. Thus, when the flow rate of the slurry becomes faster, the impact force of the slurry on the baffle ear 26 is greater, causing the slurry with a large flow rate to impact the baffle ear 26 and rotate, thereby driving the rotating shaft member 25 to rotate, and further causing the top cover part 30 to move upward. The triangular plate 31 also slides upward accordingly, so that the opening area of the triangular tooth hole 28 becomes larger, and the amount of reaction gas overflowing per unit time also increases. When the flow rate of the slurry increases, the overflow amount of the reaction gas is increased, so that the slurry can be fully utilized and the contact efficiency between the slurry and the reaction gas can be ensured. When the flow rate of the slurry slows down, the rotating shaft member 25 will reset, thereby reducing the opening area of the triangular tooth hole 28 to reduce the overflow amount of the reaction gas. After the flow rate of the slurry slows down, the amount of slurry flowing through the tray mechanism per unit time also decreases. Thus, by reducing the overflow amount of the reaction gas, it can fully contact and react with the slurry, avoiding the situation that a certain amount of mist is entrained due to the inability of excessive reaction gas to fully react with the slurry and entering the upper tray mechanism. At the same time, the utilization rate of the slurry on each tray mechanism is maximized. Moreover, when the reaction gas enters the outer cover assembly 20, the elastic spiral guide plate 32 can also be used to reduce the entrainment of mist.

[0050] As described above, it is only the specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A tray-type carbon capture and storage reaction system, comprising a reaction tower (1), a pulper (2), a slurry pump (3), a microbubble generator (4) and a Roots blower (5), characterized in that: In the reaction tower (1), a number of tray mechanisms capable of controlling the gas diffusion amount and diffusion rate according to the slurry flow rate are installed from top to bottom. The slurry with suitable viscosity prepared in the pulping machine (2) is input into the interior of the tower from the bottom slurry inlet of the reaction tower (1). The discharge port at the bottom of the reaction tower (1) is communicated between the slurry pump (3) and the microbubble generator (4). The slurry is transported from the bottom of the reaction tower (1) to the top of the reaction tower (1) through the slurry pump (3), and flows through the tray mechanism from top to bottom in sequence. The reaction gas is input from the bottom of the reaction tower (1) through the Roots blower (5), enters the slurry through aeration from the aeration pipe installed at the bottom of the reaction tower (1), and then passes through the tray mechanism from bottom to top in sequence to react with the slurry in contact. A part of the remaining reaction gas is recycled from the top of the reaction tower (1) to the Roots blower (5), and the other part is transported to the microbubble generator (4) to be mixed with the slurry to generate slurry carrying bubbles and enter the reaction tower (1) to participate in the cycle. The tray mechanism includes a tray (10). A number of outer cover assemblies (20) are equidistantly distributed on the upper end surface of the tray (10). The outer cover assembly (20) includes a main body outer cover (21) and a riser pipe (27). Elastic spiral guide plates (32) are equidistantly distributed along the side wall in the inner cavity of the riser pipe (27). The riser pipe (27) is installed through the tray (10). Triangular tooth holes (28) are equidistantly distributed on the upper end surface of the riser pipe (27). A rotating shaft member (25) is rotatably connected to the upper end surface of the main body outer cover (21). The bottom end part of the rotating shaft member (25) is threadedly connected with a top cover part (30). Triangular plates (31) corresponding to the number of the triangular tooth holes (28) are fixedly connected equidistantly on the lower end surface of the top cover part (30). Each triangular plate (31) is respectively slidably connected in the corresponding triangular tooth hole (28). Strip-shaped holes (22) are penetrated and arranged equidistantly on the outer side end surface of the main body outer cover (21). A guide frame (23) is fixedly installed in each strip-shaped hole (22).

2. The tray-type carbon capture and storage reaction system according to claim 1, characterized in that: Connection parts (33) are fixedly connected to the head end and the tail end of the elastic spiral guide plate (32) respectively. A fixed disk (34) is fixedly connected to one end of the connection part (33) close to the center position of the riser pipe (27). An installation ring (35) is fixedly connected to the connection part (33) at the tail end. The installation ring (35) is fixedly connected in the inner cavity of the riser pipe (27). The connection part (33) at the head end is slidably connected to the inner cavity side wall of the riser pipe (27). A fixed column (29) is fixedly connected to the fixed disk (34) at the head end position. The upper end of the fixed column (29) is fixedly connected to the bottom end of the top cover part (30).

3. The tray-type carbon capture and storage reaction system according to claim 2, characterized in that: A hollow cover (24) is fixedly sleeved on the rotating shaft member (25). A baffle ear (26) is fixedly connected to the hollow cover (24).

4. The tray-type carbon capture and storage reaction system according to claim 3, wherein: The strip-shaped hole (22) is inclined, and the inclination angle is set at 15 - 5°.

5. A tray-type carbon capture and storage reaction system according to claim 4, characterized in that: On the upper end surface of the tray (10), raised portions (11) are respectively provided at the edges, and a slurry inlet (13) and a slurry outlet (12) are formed on the left and right sides between the two raised portions (11).

6. A tray-type carbon capture and storage reaction system according to claim 1, characterized in that: A necked sight glass (6) is installed between two adjacent tray mechanisms on the outer side of the reaction tower (1), and a demister is installed at the top of the reaction tower (1).

7. A tray-type carbon capture and storage reaction system according to claim 1, characterized in that: The viscosity of the slurry prepared in the pulper (2) is controlled between 3500-5000 cP.

8. A tray-type carbon capture and storage reaction system according to claim 1, characterized in that: It includes controlling the input flow rates of the slurry and the reaction gas to achieve the linkage adjustment and precise control of the slurry input and the gas input, and maximizing the improvement of the mass transfer efficiency. The specific steps are as follows: Step 1: Install an on-line viscosity sensor to monitor the viscosity of the slurry output by the pulper in real time. Combine the preset viscosity range and automatically adjust the solid-liquid mixing ratio and stirring rate in the pulper to ensure that the fluidity of the slurry meets the requirements; Step 2: Set a liquid level sensor at the bottom of the reaction tower. Adjust the slurry output of the slag slurry pump according to the feedback signal of the slurry liquid level height at the bottom of the tower to maintain the stability of the slurry circulation volume in the tower. Then, dynamically adjust the rotation speed of the pump according to the slurry circulation demand in the reaction tower to precisely control the input of the slurry; Step 3: Install a gas flow meter and a pressure sensor at the bottom of the reaction tower to monitor the input amount of the reaction gas and the pressure in the tower. Install a displacement sensor in the outer cover assembly of each tray mechanism to feedback the position of the top cover part in real time, so as to receive the information about the opening degree of the triangular tooth holes. When the opening of the triangular tooth holes expands, correspondingly increase the input flow rate of the reaction gas, so as to reverse calibrate the air supply volume of the Roots blower and achieve the refined control of the gas flow rate; Step 4: According to the information about the opening degree of the triangular tooth holes, the slurry liquid level height data at the bottom of the tower, the slurry input amount of the pump, the pressure data in the tower and the flow rate data of the reaction gas, perform a fuzzy logic algorithm to achieve the dynamic balance control of the slurry and the gas in the reaction tower.

9. A tray-type carbon capture and storage reaction system according to claim 8, characterized in that: Monitor the reflux gas in the demister at the top of the tower in real time. When the reflux gas decreases, synchronously reduce the gas distribution ratio in the microbubble generator to further reduce the comprehensive energy consumption.

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