Efficient carbon capture device for cement industry

Abstract

The utility model provides a high-efficiency carbon capture device for cement industry, the high-efficiency carbon capture device is of a vertical absorption tower structure, and the interior of the absorption tower comprises an upper pretreatment area, a middle spraying area and a lower absorption area; the flue gas inlet is formed in the top of the absorption tower, the gas outlet is formed in the bottom of the absorption tower, the upper pretreatment area comprises a cyclone dust removal assembly and an electrostatic dust removal assembly, the middle spraying area comprises a multi-stage cross-flow spraying assembly, the multi-stage cross-flow spraying assembly is of a multi-layer structure, and each layer of spraying assembly comprises a plurality of atomizing nozzles; the spraying device is used for uniformly spraying absorption liquid to the middle spraying area, and the spraying direction of the absorption liquid is configured to be intersected with the gas flowing direction in the middle spraying area; the lower absorption area comprises a ceramic filler assembly which is of a multi-layer structure; the efficient carbon capture device disclosed by the embodiment of the utility model not only has relatively high carbon capture efficiency, but also has relatively strong environmental adaptability and durability, and can be suitable for an environment with high-temperature flue gas.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, in particular to an efficient carbon capture device for the cement industry. Background Art

[0002] During the cement production process, a large amount of high-temperature flue gas is generated by the combustion of the cement kiln. In recent years, in order to respond to the development route of low-carbon economy and reduce the greenhouse gases emitted during the production process, it is necessary to capture and recycle the carbon in the high-temperature flue gas for circular utilization.

[0003] However, the current carbon capture in the cement industry faces many challenges. Most of the existing carbon capture equipment is designed for a single process link, lacking systematic integration, resulting in poor connection between each link and limited overall carbon capture efficiency. For traditional absorption tower equipment, the gas-liquid contact area is limited and the mass transfer efficiency is low, making it difficult to efficiently capture carbon dioxide under large-scale cement production conditions. Moreover, most of the existing equipment has poor adaptability to the high temperature, high dust and complex gas components in the cement production process, the equipment is prone to corrosion and blockage, requires frequent maintenance, and has high operating costs. At the same time, in terms of energy consumption, the existing carbon capture equipment has too high energy consumption, further increasing the cement production cost and being not conducive to wide promotion and application. Summary of the Utility Model

[0004] In view of this, the embodiments of the present utility model provide an efficient carbon capture device for the cement industry to eliminate or improve one or more defects existing in the prior art.

[0005] The present utility model provides an efficient carbon capture device for the cement industry. The efficient carbon capture device has a vertical absorption tower structure, and the interior of the absorption tower includes an upper pretreatment area, a middle spraying area and a lower absorption area.

[0006] The absorption tower includes a flue gas inlet and a gas outlet. The flue gas inlet is arranged at the top position of the absorption tower, and the gas outlet is arranged at the bottom position of the absorption tower, so that after the flue gas enters the interior of the absorption tower, it can successively pass through the upper pretreatment area, the middle spray area, and the lower absorption area. The upper pretreatment area includes a cyclone dust removal component and an electrostatic dust removal component. The cyclone dust removal component is connected to the flue gas inlet through a transmission pipeline. The electrostatic dust removal component is located at the side position of the cyclone dust removal component and is connected to the cyclone dust removal component through a transmission pipeline. The middle spray area includes a multi-stage cross-flow spray component. The multi-stage cross-flow spray component is a multi-layer structure, and each layer of the spray component includes a plurality of atomizing nozzles. The multi-stage cross-flow spray component is used to uniformly spray the absorption liquid into the middle spray area, and the spraying direction of the absorption liquid is configured to intersect with the gas flow direction in the middle spray area. The lower absorption area includes a ceramic packing component. The ceramic packing component is a multi-layer structure and is used to increase the contact area between the absorption liquid and the gas.

[0007] In some embodiments of the present invention, the high-efficiency carbon capture device further includes a membrane separation component, a rectifying column, and an adsorption column. The gas outlet of the absorption tower is connected to the input end of the membrane separation component through a transmission pipeline. The carbon dioxide output end of the membrane separation component is connected to the input end of the rectifying column through a transmission pipeline. The output end of the rectifying column is connected to the input end of the adsorption column through a transmission pipeline. A gas separation membrane is arranged inside the membrane separation component and is used to separate carbon dioxide in the gas. The rectifying column is used to further rectify and purify the carbon dioxide gas. The adsorption column is filled with an adsorbent inside and is used to further remove impurities in the carbon dioxide gas.

[0008] In some embodiments of the present invention, the surface of the ceramic packing component has a porous structure. Each layer of the ceramic packing component is arranged as a regular corrugated plate structure, and the geometric shape of the corrugated plate matches the shape of the ceramic packing component.

[0009] In some embodiments of the present invention, the surface of the corrugated plate is provided with a hydrophilic coating structure.

[0010] In some embodiments of the present invention, the atomizing nozzles are arranged circumferentially on the inner wall of the middle spray area of the absorption tower, and are used for the atomizing nozzles to spray the absorption liquid from the periphery to the center of the middle spray area; and / or, the multi-stage cross-flow spray component further includes an installation main body and a fixing bracket. The installation main body is installed at the middle position in the horizontal direction of the middle spray area through the fixing bracket, and each atomizing nozzle is installed on the side wall of the installation main body and is used for the atomizing nozzles to spray the absorption liquid from the center to the periphery of the middle spray area.

[0011] In some embodiments of the present utility model, the atomizing nozzles of adjacent layers are arranged staggeredly in the transverse cross-section of the absorption tower; the atomizing nozzle includes a frustum part and a cylindrical part, the frustum part is arranged on the end face of one end of the cylindrical part, and a plurality of liquid spraying holes are arranged on the inclined side wall and the top surface of the frustum part.

[0012] In some embodiments of the present utility model, the atomizing nozzle is further provided with an angle adjusting mechanism, the angle adjusting mechanism includes a rotating shaft mechanism and a telescopic driving mechanism, the atomizing nozzle is rotationally connected to the inner wall of the absorption tower or the installation main body through the rotating shaft mechanism, one end of the telescopic driving mechanism is connected to the atomizing nozzle, and the other end is connected to the inner wall of the absorption tower or the installation main body, for adjusting the spraying angle and spraying direction of the atomizing nozzle.

[0013] In some embodiments of the present utility model, the cyclone dust removal assembly is located at the outer peripheral position of the upper pretreatment area, the cyclone dust removal assembly includes a conical cylinder for preliminarily separating gas and dust, and a dust collecting bin for collecting and storing the separated dust, the dust collecting bin is connected to the bottom dust outlet of the conical cylinder, and the electrostatic dust removal assembly is connected to the top gas outlet of the conical cylinder through a transmission pipeline; the electrostatic dust removal assembly is located at the inner peripheral position of the upper pretreatment area, so that the gas outlet area of the electrostatic dust removal assembly corresponds to the middle area of the middle spraying area, and an electrostatic adsorption mechanism is arranged inside the electrostatic dust removal assembly.

[0014] In some embodiments of the present utility model, a first gas distributor is arranged at the outlet position of the electrostatic dust removal assembly, so that gas can enter the middle spraying area evenly; a second gas distributor and a third gas distributor are arranged between the layers of the ceramic filler assembly.

[0015] In some embodiments of the present utility model, the filler pores of each layer of the ceramic filler assembly decrease layer by layer from top to bottom.

[0016] In some embodiments of the present utility model, the absorption tower further includes a liquid-solid mixing assembly, the liquid-solid mixing assembly includes a collecting tank and a stirring assembly; the collecting tank is arranged at the bottom of the lower absorption area of the absorption tower for receiving and collecting the absorption liquid; the stirring assembly includes stirring blades and a driving mechanism, the stirring blades are located inside the collecting tank, and the driving mechanism is fixedly connected to the stirring blades for driving the stirring blades to rotate inside the collecting tank.

[0017] According to the technical solutions described in the high-efficiency carbon capture device for the cement industry in the embodiments of the present utility model, the beneficial effects that can be obtained at least include:

[0018] The carbon capture device of the present utility model is integrally arranged in a vertical absorption tower structure, which can reduce the floor area occupied by the device body, is beneficial to improving the space utilization rate, and can also obtain a better overall heat dissipation effect; in the upper pretreatment area of the carbon capture device, a cyclone dust removal component and an electrostatic dust removal component are arranged, which can perform dust removal operations on the incoming gas, is beneficial to reducing the probability of dust blockage inside the device after long-term operation, and reducing the adverse effects of dust on internal equipment, is beneficial to improving the adaptability of the carbon capture device to the flue gas environment, and extending the service life of the equipment; in the middle spraying area of the carbon capture device, a multi-stage cross-flow spraying component is arranged, which not only has a good cooling effect on high-temperature gas, but also can increase the gas-liquid contact area and improve the gas-liquid mixing effect, is beneficial to improving the mass transfer efficiency of the absorbent; in the lower absorption area of the carbon capture device, a ceramic packing component is arranged, using ceramic materials can improve the stability and durability of the packing structure, and the ceramic packing component is arranged in a multi-layer structure can further improve the gas-liquid mixing efficiency, is beneficial to improving the carbon capture efficiency of the carbon capture device, and improving the adaptability of the carbon capture device to the high-temperature flue gas environment.

[0019] Additional advantages, objects, and features of the present utility model will be partially described below and will become partially apparent to those of ordinary skill in the art after studying the following text, or may be learned from the practice of the present utility model. The objects and other advantages of the present utility model can be realized and obtained by the structures specifically pointed out in the specification and the drawings.

[0020] Those skilled in the art will understand that the objects and advantages that can be achieved by the present utility model are not limited to the above specifically described, and the above and other objects that the present utility model can achieve will be more clearly understood according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present utility model, form a part of this application, and do not constitute a limitation to the present utility model. The components in the drawings are not drawn to scale, but are only for showing the principles of the present utility model. In order to facilitate showing and describing some parts of the present utility model, the corresponding parts in the drawings may be enlarged, that is, may become larger relative to other components in the exemplary device actually manufactured according to the present utility model.

[0022] Figure 1 It is a schematic diagram of the absorption tower structure of the high-efficiency carbon capture device for the cement industry in an embodiment of the present utility model.

[0023] Figure 2 It is a schematic diagram of the overall structure of the high-efficiency carbon capture device for the cement industry in an embodiment of the present utility model.

[0024] Figure 3This is a schematic structural diagram of Example 2 of the multi-stage cross-flow spray assembly in an embodiment of the present utility model.

[0025] Figure 4 This is a schematic side view of an atomizing nozzle in an embodiment of the present utility model.

[0026] Figure 5 This is a schematic top view of an atomizing nozzle in an embodiment of the present utility model.

[0027] Figure 6 This is a schematic structural diagram of an angle adjustment mechanism in an embodiment of the present utility model.

[0028] Figure 7 This is a schematic layered structure diagram of a ceramic packing assembly in an embodiment of the present utility model.

[0029] Figure 8 This is a schematic structural diagram of a second gas distributor in a top view in an embodiment of the present utility model.

[0030] Reference numerals:

[0031] 1, absorption tower; 11, flue gas inlet; 12, gas outlet; 13, cyclone dust removal assembly; 131, conical cylinder; 132, dust collection bin; 14, electrostatic dust removal assembly; 141, electrostatic adsorption mechanism; 142, first gas distributor; 15, multi-stage cross-flow spray assembly; 151, atomizing nozzle; 151-1, frustum part; 151-2, cylindrical part; 151-3, liquid spraying hole; 152, installation main body; 153, fixing bracket; 154, angle adjustment mechanism; 154-1, rotating shaft mechanism; 154-2, telescopic driving mechanism; 16, ceramic packing assembly; 161, corrugated plate; 162, second gas distributor; 163, third gas distributor; 17, liquid-solid mixing assembly; 171, collection tank; 172, stirring assembly; 172-1, stirring blade; 172-2, driving mechanism; 18, membrane separation assembly; 19, distillation column; 20, adsorption tower. Detailed implementation manners

[0032] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with the implementation manners and the drawings. Here, the illustrative implementation manners of the present utility model and their descriptions are used to explain the present utility model, but do not limit the present utility model.

[0033] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, and other details less related to the present utility model are omitted.

[0034] It should be emphasized that when the term "comprising / including" is used herein, it refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0035] Here, it should also be noted that if not otherwise specified, the term "connection" in this text can not only refer to direct connection, but also represent indirect connection with intermediates.

[0036] In the following, embodiments of the present utility model will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0037] To solve the problems in the prior art that the carbon capture device in the cement industry has a limited gas-liquid contact area, resulting in low carbon capture efficiency, and the device has poor adaptability to high temperature, high dust and complex gases in the cement production process and requires frequent shutdown for maintenance, the present utility model provides an efficient carbon capture device for the cement industry. In the upper pretreatment area inside it, a cyclone dust removal component 13 and an electrostatic dust removal component 14 are provided. Through the multi-stage dust removal method, most of the dust or dust in the gas can be removed in advance. Especially for the high-dust gas in the cement industry, the dust content in the gas can be effectively reduced; the carbon capture device is also provided with a special multi-stage cross-flow spraying component 15, which can not only effectively increase the contact area between the gas and the absorbent liquid, but also has a good cooling effect on the high-temperature gas, which is beneficial to improving the mass transfer efficiency of the absorbent liquid; the carbon capture device is also provided with a ceramic packing component 16, which is the main area for gas-liquid mixing. Its multi-layer structure is beneficial to improving the gas-liquid mixing efficiency. Using ceramic materials can be suitable for the complex gas environment in the cement industry, which is beneficial to improving the durability of the packing, and thus extending the overall working life of the carbon capture device and reducing the number of shutdowns for maintenance.

[0038] An embodiment of the present utility model provides an efficient carbon capture device for the cement industry. The efficient carbon capture device is a vertical absorption tower 1 structure, as Figure 1As shown, the interior of the absorption tower 1 includes an upper pretreatment area, a middle spraying area, and a lower absorption area. The absorption tower 1 includes a flue gas inlet 11 and a gas outlet 12. The flue gas inlet 11 is arranged at the top position of the absorption tower 1, and the gas outlet 12 is arranged at the bottom position of the absorption tower 1, so that after the flue gas enters the interior of the absorption tower 1, it can successively pass through the upper pretreatment area, the middle spraying area, and the lower absorption area. The absorption tower 1 of this carbon capture device adopts the method of inlet air at the top and outlet air at the bottom. For the high-temperature flue gas in the cement industry, the method of inlet air at the top makes most of the heat of the absorption tower 1 directly gather at the top of the absorption tower 1. Since the equipment density at the top of the absorption tower 1 is low and the air flow is faster, a better heat dissipation effect can be obtained. The structure of inlet air at the top can avoid the situation that a large amount of heat accumulates at the bottom of the absorption tower 1 and cannot be dissipated compared with the structure of inlet air at the bottom, and has higher safety.

[0039] The upper pretreatment area includes a cyclone dust removal component 13 and an electrostatic dust removal component 14. The cyclone dust removal component 13 is connected to the flue gas inlet 11 through a transmission pipeline. The electrostatic dust removal component 14 is located at the side position of the cyclone dust removal component 13 and is connected to the cyclone dust removal component 13 through a transmission pipeline. After the gas enters the interior of the absorption tower 1, a dust removal operation is first carried out to separate the dust in the gas from the gas, which can avoid a large amount of dust entering the interior of the absorption tower 1 and affecting the normal operation of the equipment or causing blockage. The upper pretreatment area performs multiple dust removal steps through the cyclone dust removal component 13 and the electrostatic dust removal component 14. The large particle dust in the gas (particle diameter size above 0.1 micrometer) is removed through the cyclone dust removal component 13, and the small particle dust in the gas (particle diameter size between 0.01 and 0.1 micrometer) is further removed through the electrostatic dust removal component 14. Combining the cyclone dust removal technology and the electrostatic dust removal technology can improve the separation effect of the dust in the gas, which is beneficial to reducing the dust content in the gas and reducing the wear and influence of the dust on the internal equipment of the absorption tower 1.

[0040] The middle spraying area includes a multi-stage cross-flow spraying assembly 15. The multi-stage cross-flow spraying assembly 15 is of a multi-layer structure, and each layer of the spraying assembly includes a number of atomizing nozzles 151. The multi-stage cross-flow spraying assembly 15 is used to uniformly spray the absorption liquid into the middle spraying area. The spraying direction of the absorption liquid is configured to intersect with the gas flow direction in the middle spraying area. As a preferred embodiment, the included angle between the liquid spraying direction and the gas flow direction can be set to 90° to achieve a better cross-flow effect. The cross-flow spraying assembly adopts a layered design, which can improve the coverage range of the spraying assembly and enhance the adaptability to different areas. For example, for the upper spraying assembly, since it is in contact with the gas first, a larger spraying amount may be required, and a better spraying effect can be achieved by increasing the number of nozzles. For the lower spraying assembly, since the gas may have mixed with a certain number of liquid droplets, the spraying pressure can be appropriately reduced or the number of nozzles can be decreased. The multi-stage cross-flow spraying assembly 15 sprays the absorption liquid in a cross-flow manner with the gas, which is beneficial to improving the gas-liquid mixing effect and the mass transfer efficiency.

[0041] The lower absorption area includes a ceramic packing assembly 16. The ceramic packing assembly 16 is of a multi-layer structure and is used to increase the contact area between the absorption liquid and the gas. The packing layer uses ceramic materials, taking advantage of the stability of ceramics, which are not prone to reaction or corrosion, and can maintain a stable structure in high-temperature, high-dust, and complex gas environments, facilitating the extension of the stability and working life of the packing assembly, thereby reducing the maintenance frequency of the carbon capture device. As the main gas-liquid mixing assembly in the absorption tower 1, the packing assembly is set as a multi-layer structure, which can increase the contact area between the absorption liquid and the gas and is beneficial to improving the gas pressure mass transfer efficiency.

[0042] In the above embodiment, the advantages of the high-efficiency carbon capture device for the cement industry are as follows: The overall structure adopts a vertical absorption tower 1, which can not only reduce the floor area occupied by the device body and improve the space utilization rate but also obtain a better overall heat dissipation effect. The upper pretreatment area of the carbon capture device is provided with a cyclone dust removal assembly 13 and an electrostatic dust removal assembly 14, which can perform dust removal operations on the incoming gas, facilitating the reduction of the probability of dust blockage inside the device after long-term operation and the reduction of the adverse effects of dust on internal equipment, improving the adaptability of the carbon capture device to the flue gas environment and extending the service life of the equipment. The middle spraying area of the carbon capture device is provided with a multi-stage cross-flow spraying assembly 15, which not only has a cooling effect on high-temperature gas but also can increase the gas-liquid contact area and improve the gas-liquid mixing effect, facilitating the improvement of the mass transfer efficiency of the absorption liquid. The lower absorption area of the carbon capture device is provided with a ceramic packing assembly 16. Using ceramic materials can improve the stability and durability of the packing assembly structure. The packing assembly is set as a multi-layer structure, which can further improve the gas-liquid mixing efficiency, facilitating the improvement of the carbon capture efficiency of the carbon capture device for carbon dioxide and the adaptability of the carbon capture device to the high-temperature flue gas environment.

[0043] Compared with the common co-current mode, the absorption liquid using the cross-flow spraying mode has the following advantages: Since the gas-liquid flow directions intersect, stronger turbulence and mixing can be formed, which is beneficial to increasing the gas-liquid contact area and improving the mass transfer efficiency; The relative velocity of the gas-liquid in cross-flow spraying is higher than that in the co-current mode, which can extend the effective contact time of the gas-liquid and is suitable for rapid reaction or high-concentration gas treatment situations; Cross-flow spraying makes the liquid distribution more uniform and can improve the overall mass transfer effect; Cross-flow spraying has a higher capture efficiency for high-concentration gases and is beneficial to adapting to the high-dust environment in the cement industry.

[0044] Compared with the common counter-current mode, the absorption liquid using the cross-flow spraying mode has the following advantages: The fluid resistance of cross-flow spraying is smaller than that of counter-current spraying. Therefore, the pressure of the liquid is relatively lower, which can reduce the energy consumption of the spraying system; Cross-flow spraying can also avoid the flooding phenomenon that occurs in high-flow-rate environments and is beneficial to improving the stability of the spraying system.

[0045] In some embodiments, as Figure 2 shown, the high-efficiency carbon capture device further includes a membrane separation module 18, a distillation column 19, and an adsorption column 20; The gas outlet 12 of the absorption tower 1 is connected to the input end of the membrane separation module 18 through a transmission pipeline, the carbon dioxide output end of the membrane separation module 18 is connected to the input end of the distillation column 19 through a transmission pipeline, and the output end of the distillation column 19 is connected to the input end of the adsorption column 20 through a transmission pipeline; A gas separation membrane is arranged inside the membrane separation module 18 for separating carbon dioxide in the gas, the distillation column 19 is used for further rectifying and purifying the carbon dioxide gas, and the adsorption column 20 is filled with an adsorbent inside for further removing impurities in the carbon dioxide gas.

[0046] Inside the membrane separation module 18, multiple layers of gas separation membranes can be provided for the preliminary separation of the gas discharged from the absorption tower 1. For example, the gas separation membrane can be a polyimide membrane, a polysulfone membrane, a carbon molecular sieve membrane, etc. Using the principle of selective permeation of the gas separation membrane, carbon dioxide is preferentially separated and captured. The advantage of using the membrane separation technology for carbon dioxide separation is that since most of the carbon dioxide in the gas has been absorbed by the absorbent inside the absorption tower 1, the carbon dioxide content in the gas discharged from the absorption tower 1 is relatively low. The gas separation membrane has a good capture effect on low-concentration carbon dioxide, and the separation efficiency is 50% - 90%. The energy consumption during the separation process is low, there is no consumption of chemical solvents, and secondary pollution can be avoided. Setting the membrane separation module 18 is beneficial to further improve the overall carbon capture efficiency of the carbon capture device; since the separation efficiency of the distillation tower 19 in carbon dioxide capture reaches 95% - 99%, and the distillation process is mature without chemical consumption, the distillation tower 19 is set to further purify the carbon dioxide separated by the membrane separation module 18 to increase the carbon dioxide concentration. The adsorption tower 20 removes impurities in the gas (mainly trace impurities with a diameter greater than 0.33 nanometers) through the adsorbent inside. The adsorbent can adopt structures such as activated carbon with a small pore diameter or a nano filter screen to further purify the carbon dioxide. Using the membrane separation process combined with the distillation process can further capture carbon from the gas discharged from the absorption tower 1, and the captured carbon dioxide has a high content and can be directly recycled, which is beneficial to improving the overall carbon capture efficiency.

[0047] In some embodiments, the surface of the ceramic packing module 16 has a porous structure. Setting the porous structure can increase the surface area of the ceramic packing module 16. During operation, the absorbent is evenly distributed in the pores of the porous ceramic packing, which can not only ensure sufficient contact between the absorbent and air but also prevent the loss of the absorbent during use, being beneficial to reducing the consumption of the absorbent.

[0048] In some embodiments, each layer of the ceramic packing assembly 16 is arranged in a structured corrugated plate 161 structure, and the geometric shape of the corrugated plate 161 matches the shape of the ceramic packing assembly 16. On the one hand, arranging the ceramic packing assembly 16 in a structured corrugated plate 161 structure can improve the mass transfer and reaction efficiency. The regular corrugated structure of the corrugated plate 161 increases the surface area of gas-liquid contact, promoting the full reaction of carbon dioxide with the absorbent liquid. The grooves on the surface of the corrugated plate 161 have a guiding effect on the absorbent liquid. By arranging the corrugated plates 161 regularly, the absorbent liquid forms a uniform film, which is beneficial to reducing the dry area and channeling phenomenon and improving the absorption efficiency. The corrugated plate 161 with a geometric shape can also guide the gas to form an orderly eddy current, which is beneficial to strengthening gas-liquid mass transfer and shortening the reaction time. On the other hand, the corrugated plates 161 at each position in the regularly arranged corrugated plate 161 structure adopt standard sizes. The ceramic packing assembly 16 arranged in a structured corrugated plate 161 structure is a modular design, which is convenient for daily replacement and cleaning. For example, when a part of the structure of the ceramic packing assembly 16 is blocked or damaged, a new plate of the corresponding size can be directly replaced without replacing the overall structure of the packing assembly, which is beneficial to reducing the replacement time of the ceramic packing assembly 16, reducing the downtime and operating costs caused by maintenance, and improving the overall working efficiency and economy of the device.

[0049] Furthermore, a hydrophilic coating structure is provided on the surface of the corrugated plate 161. The hydrophilic coating can be a fluoropolymer coating or a ceramic-based coating, etc. The provided hydrophilic coating can not only protect the corrugated plate 161, but also extend the service life of the corrugated plate 161 by preventing oxidation and high-temperature corrosion. It can also make the flow of the absorbent liquid on the surface of the corrugated plate 161 smoother, enhance the scouring effect of the absorbent liquid and reduce the fouling risk, which is beneficial to maintaining the long-term stable performance of the ceramic packing assembly 16 in an environment of high dust, high humidity or easily fouling flue gas, and thus reducing the unplanned shutdown of the carbon capture device.

[0050] In some embodiments, since the gas flow path passes through the inside of the absorption tower 1 from top to bottom, the flow direction in the middle spray zone of the gas is downward. The multi-stage cross-flow spray assembly 15 arranged in the middle spray zone sprays the absorbent liquid at an angle intersecting the gas flow direction to achieve the cross-flow of gas and liquid. There are various embodiments for the multi-stage cross-flow spray assembly 15 in the middle spray zone: the atomizing nozzles 151 can be arranged on the inner wall around the middle spray zone; the atomizing nozzles 151 can also be installed at the middle position in the horizontal direction of the middle spray zone through brackets; the atomizing nozzles 151 can also be arranged both around and at the middle position of the middle spray zone.

[0051] In Embodiment 1, the atomizing nozzles 151 can be installed on the inner wall around the middle spraying area. Installing the atomizing nozzles 151 on the inner wall does not require setting up additional bracket structures or transmission pipelines, and directly installing the atomizing nozzles 151 on the inner wall of the absorption tower 1 is convenient for installation or replacement, which is beneficial to reducing the structural complexity of the multi-stage cross-flow spraying assembly 15 and improving the stability and reliability of the device. Specifically, as Figure 2 shown, the atomizing nozzles 151 are arranged circumferentially on the inner wall of the middle spraying area of the absorption tower 1, and the atomizing nozzles 151 are used to spray the absorption liquid from the periphery to the center of the middle spraying area.

[0052] In Embodiment 2, as Figure 3 shown, the atomizing nozzles 151 can be installed at the middle position in the horizontal direction of the middle spraying area through brackets. In the horizontal direction of the middle spraying area, the absorption liquid diffuses and sprays from the center to the surroundings, which can improve the uniformity of the absorption liquid distribution, is beneficial to reducing the dry spraying area in the inner wall area, and improving the gas-liquid mass transfer efficiency. Specifically, as Figure 3 shown, the multi-stage cross-flow spraying assembly further includes an installation main body 152 and a fixing bracket 153. The installation main body 152 is installed at the middle position in the horizontal direction of the middle spraying area through the fixing bracket 153, and each atomizing nozzle 151 is installed on the side wall of the installation main body 152, and the atomizing nozzles 151 are used to spray the absorption liquid from the center to the periphery of the middle spraying area.

[0053] In Embodiment 3, atomizing nozzles 151 can also be provided both around and at the middle position of the middle spraying area, and the absorption liquid is sprayed in a staggered manner in the inner and outer directions of the middle spraying area, which can further increase the contact area between the absorption liquid and the gas, improve the impact probability of the gas and liquid, and is beneficial to improving the gas-liquid mass transfer efficiency. However, the structural complexity of the corresponding multi-stage cross-flow spraying assembly 15 increases, and it needs to be selected in combination with the actual use scenario and economy during design.

[0054] In the above embodiments, different spraying effects of the absorption liquid are achieved by adjusting the installation positions of the atomizing nozzles 151 in the multi-stage cross-flow spraying assembly 15, and the absorption liquid is evenly distributed in the middle spraying area through the spraying of each atomizing nozzle 151 to increase the gas-liquid contact area.

[0055] In some embodiments, the atomizing nozzles 151 of adjacent layers are arranged in a staggered manner in the transverse section of the absorption tower 1. Arranging the atomizing nozzles 151 of different layers in a staggered manner can reduce the dry area of the absorption liquid distribution in the transverse section, which is beneficial to improving the uniformity of the absorption liquid distribution.

[0056] In some embodiments, as Figure 4 and Figure 5As shown, the atomizing nozzle 151 includes a frustum part 151-1 and a cylindrical part 151-2. The frustum part 151-1 is arranged on the end face of one end of the cylindrical part 151-2. A plurality of liquid spraying holes 151-3 are arranged on the inclined side wall and the top surface of the frustum part 151-1. The spraying surface of the atomizing nozzle 151 adopts a frustum structure with an inclined slope, which can not only increase the number of liquid spraying holes 151-3 to improve the spraying efficiency, but also expand the spraying angle of the atomizing nozzle 151, which is beneficial to realizing efficient spraying of a large-area space. In addition, the frustum part is set as a structure protruding outwards, which can also prevent dust or impurities from accumulating on the surface of the nozzle, which is beneficial to reducing the blockage probability of the atomizing nozzle 151 to ensure that the multi-stage cross-flow spraying assembly can operate stably in a high-dust environment. Including but not limited to this, the atomizing nozzle 151 can also adopt other nozzle structures that can spray the absorption liquid evenly, and can be selected in combination with factors such as the actual use scenario and procurement cost during actual use.

[0057] In some embodiments, as Figure 6 shown, the atomizing nozzle 151 is further provided with an angle adjusting mechanism 154. The angle adjusting mechanism 154 includes a rotating shaft mechanism 154-1 and a telescopic driving mechanism 154-2. The atomizing nozzle 151 is rotationally connected to the inner wall of the absorption tower 1 or the mounting body 152 through the rotating shaft mechanism 154-1. One end of the telescopic driving mechanism 154-2 is connected to the atomizing nozzle 151, and the other end is connected to the inner wall of the absorption tower or the mounting body 152, and is used to adjust the spraying angle and spraying direction of the atomizing nozzle 151. The rotating shaft structure can adopt a structure such as a straight-shaped rotating shaft or a four-way adjustable damping rotating shaft for realizing the rotational connection between the atomizing nozzle 151 and the fixed component. The telescopic driving mechanism 154-2 can adopt an electric telescopic rod or a hydraulic telescopic rod, and is used to drive the atomizing nozzle 151 to rotate around the rotating shaft through its own elongation or shortening, thereby adjusting the spraying angle. Setting the angle adjusting mechanism 154 can adjust the spraying angles of the atomizing nozzles 151 at different layer positions to adapt to gas environments with different flue gas concentrations. For example, in the middle spraying area, the spraying angle of the atomizing nozzle 151 located at the upper layer position can be set to be inclined upwards so that the absorption liquid can contact the gas faster, which is beneficial to prolonging the gas-liquid contact time. The spraying angle of the atomizing nozzle 151 located at the middle layer position is set to be horizontally transverse so that the absorption liquid and the air flow form a better cross-flow effect, which is beneficial to improving the mass transfer efficiency. The spraying angle of the atomizing nozzle 151 located at the lower layer position can be set to be inclined downwards so that the longitudinal spraying area of the absorption liquid increases, which is beneficial to increasing the gas-liquid contact area.

[0058] In some embodiments, as Figure 2As shown, the cyclone dust removal component 13 is located at the outer peripheral position of the upper pretreatment area. The cyclone dust removal component 13 includes a conical cylinder 131 for preliminarily separating gas and dust, and a dust collection bin 132 for collecting and storing the separated dust. The dust collection bin 132 is interconnected with the dust outlet at the bottom of the conical cylinder 131. The electrostatic dust removal component 14 is interconnected with the gas outlet 12 at the top of the conical cylinder 131 through a transmission pipeline. The cyclone dust removal component 13 is also provided with a driving fan for providing driving force for the flow of gas to form a cyclone airflow inside the conical cylinder 131. As a preferred embodiment, a dust concentration sensor can be arranged at the inlet position of the cyclone dust removal component 13, and the driving fan adjusts the working power according to the dust concentration in the gas. For example, when the dust content in the gas is relatively high, the power of the driving fan is increased to improve the dust removal effect; when the dust content in the gas is relatively low, the power of the driving fan is decreased to reduce the dust removal power and energy consumption.

[0059] The electrostatic dust removal component 14 is located at the inner peripheral position of the upper pretreatment area so that the gas outlet area of the electrostatic dust removal component 14 corresponds to the middle area of the middle spraying area. An electrostatic adsorption mechanism 141 and a conductive chamber are arranged inside the electrostatic dust removal component 14. The conductive chamber is used to make the particles in the passing gas become charged. The electrostatic adsorption mechanism 141 can adopt a metal dust collection plate, and the metal dust collection plate can be arranged in a multi-layer parallel metal plate structure, which is suitable for further dust removal of gas in an environment with a large flue gas volume.

[0060] In some embodiments, as Figure 2 and Figure 7 shown, a first gas distributor 142 is arranged at the outlet position of the electrostatic dust removal component 14 so that the gas can enter the middle spraying area evenly. The first gas distributor 142 is arranged at the outlet position of the electrostatic dust removal component 14, and a plurality of shunt partitions are arranged inside it for shunting the gas to improve the uniformity and consistency of the gas entering the middle spraying area. Second gas distributors 162 and third gas distributors 163 are arranged between the layers of the ceramic packing component 16. The second gas distributor 162 is located at the position between the upper layer and the middle layer of the ceramic packing component 16, and the third gas distributor 163 is located at the position between the middle layer and the lower layer of the ceramic packing component 16. The two gas distributors are used for further shunting the gas and the absorption liquid in the packing component, which is beneficial to improving the uniformity of the distribution of the gas and the absorption liquid inside each layer of packing.

[0061] In some embodiments, the filler pores of each layer of the ceramic filler assembly 16 decrease layer by layer from top to bottom. The decrease in the filler pores layer by layer along the gas flow direction conforms to the flow characteristics of gas-liquid, and the gas-liquid mixing effect becomes stronger from weak to strong, which can prevent flooding in the filler layer and also reduce the blocking effect on the gas flow during the gas flow process. For example, the pores of the upper filler of the ceramic filler assembly 16 can be set to 10-50 mm, which is used to contact the gas-liquid mixture with high dust and high flow rate. Setting larger pores can prevent dust accumulation and blockage, and reduce the pressure drop and erosion wear. The pores of the middle filler of the ceramic filler assembly 16 can be set to 5-15 mm, which is used to balance the mass transfer efficiency and pressure drop and can enhance the mixing effect of gas-liquid turbulence. The pores of the lower filler of the ceramic filler assembly 16 can be set to 3-8 mm, which is used to increase the surface area of the gas and the absorption liquid and is conducive to improving the mass transfer efficiency of gas-liquid. For the pores in the ceramic filler assembly 16, the smaller the pore size, the better the gas-liquid mixing effect in the filler, but the corresponding manufacturing cost also increases. During actual design, it should be adjusted in combination with factors such as the mass transfer efficiency requirements, economy, and the pressure distribution of the gas inside the absorption tower 1.

[0062] In some embodiments, the absorption tower 1 further includes a liquid-solid mixing assembly 17, and the liquid-solid mixing assembly 17 includes a collection tank 171 and a stirring assembly 172; the collection tank 171 is arranged at the bottom of the lower absorption area of the absorption tower 1 for receiving and collecting the absorption liquid. The collection tank 171 can be made of ceramic material, which can improve the structural stability and durability. The stirring assembly 172 includes stirring blades 172-1 and a driving mechanism 172-2. The stirring blades 172-1 are located inside the collection tank 171, and the driving mechanism 172-2 is fixedly connected to the stirring blades 172-1 for driving the stirring blades 172-1 to rotate inside the collection tank 171. The driving mechanism 172-2 can adopt a DC motor or a driving motor, which is used to drive the stirring blades 172-1 to rotate after being powered on. The stirring tablets are used to stir the absorption liquid inside the collection tank 171 and the solid deposits inside the absorption liquid, which can make the absorption liquid and the solid deposits fully mixed, is conducive to accelerating the sedimentation and separation of solid impurities, and enhancing the mass transfer effect between the absorption liquid and the solid deposits, and is conducive to improving the liquid-solid mass transfer efficiency.

[0063] According to the technical solutions described in the high-efficiency carbon capture device for the cement industry in the embodiments of the present invention, the beneficial effects that can be achieved at least include:

[0064] (1) The upper pretreatment area of the carbon capture device is provided with a cyclone dust removal assembly and an electrostatic dust removal assembly for separating the dust in the gas from the gas, which can avoid a large amount of dust entering the absorption tower and affecting the normal operation of the equipment or causing blockage, and is conducive to reducing the wear and adverse effects of the dust on the internal equipment.

[0065] (2) The middle spray zone of the carbon capture device is provided with a multi-stage cross-flow spray assembly, which can improve the coverage range and uniformity of the absorption liquid spray, is beneficial to improving the gas-liquid mixing effect and the mass transfer efficiency.

[0066] (3) The lower absorption zone of the carbon capture device is provided with a ceramic packing assembly with a multi-layer structure, which can adapt to the gas environment of high temperature and high dust, and at the same time fully mix the absorption liquid with the gas to improve the mass transfer efficiency.

[0067] (4) The carbon capture device as a whole adopts a vertical absorption tower structure with top inlet gas, which can not only reduce the floor area occupied by the device body and is beneficial to improving the space utilization rate, but also enable the gas inside the absorption tower to be sprayed first and then pass through the packing, so as to obtain a better overall heat dissipation effect and is beneficial to improving the safety of the production process.

[0068] (5) The carbon capture device is also provided with a membrane separation assembly, a rectifying tower and an adsorption tower, which are used for further carbon capture of the gas discharged from the absorption tower and concentration purification of the captured carbon dioxide gas, and are beneficial to improving the overall carbon capture efficiency of the device.

[0069] (6) Each layer of the ceramic packing assembly of the carbon capture device is set as a regular corrugated plate structure, which can reduce the dry zone and channeling phenomenon and improve the absorption efficiency, and can also facilitate daily replacement and cleaning and reduce the downtime.

[0070] (7) The atomizing nozzles of the multi-stage cross-flow spray assembly of the carbon capture device are also provided with an angle adjusting mechanism for flexibly adjusting the spraying angle of the atomizing nozzles, which is beneficial to optimizing the spraying effect of the absorption liquid and improving the gas-liquid mass transfer efficiency.

[0071] (8) A second gas distributor and a third gas distributor are arranged between the layers of the ceramic packing assembly of the carbon capture device, which are used for further shunting the gas and the absorption liquid in the packing assembly, and are beneficial to improving the uniformity of the gas and the absorption liquid distribution inside each layer of the packing.

[0072] (9) The carbon capture device is provided with a liquid-solid mixing assembly for stirring the absorption liquid and the solid sediment to be fully mixed, which can accelerate the sedimentation separation of solid impurities and enhance the mass transfer effect between the absorption liquid and the solid sediment, and is beneficial to improving the liquid-solid mass transfer efficiency.

[0073] It should be clear that the present utility model is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present utility model is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present utility model.

[0074] In the present utility model, the features described and / or illustrated for one embodiment can be used in the same or a similar manner in one or more other embodiments, and / or combined with the features of other embodiments or replace the features of other embodiments.

[0075] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the embodiments of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An efficient carbon capture device for the cement industry, the efficient carbon capture device is of a vertical absorption tower structure, characterized in that, The interior of the absorption tower (1) includes an upper pretreatment area, a middle spraying area, and a lower absorption area; The absorption tower (1) includes a flue gas inlet (11) and a gas outlet (12). The flue gas inlet (11) is arranged at the top position of the absorption tower (1), and the gas outlet (12) is arranged at the bottom position of the absorption tower (1), so that after the flue gas enters the interior of the absorption tower (1), it can successively pass through the upper pretreatment area, the middle spraying area, and the lower absorption area; The upper pretreatment area includes a cyclone dust removal component (13) and an electrostatic dust removal component (14). The cyclone dust removal component (13) is connected to the flue gas inlet (11) through a transmission pipeline. The electrostatic dust removal component (14) is located at the side position of the cyclone dust removal component (13) and is connected to the cyclone dust removal component (13) through a transmission pipeline; The middle spraying area includes a multi-stage cross-flow spraying component (15). The multi-stage cross-flow spraying component (15) is a multi-layer structure, and each layer of the spraying component includes a number of atomizing nozzles (151). The multi-stage cross-flow spraying component (15) is used to uniformly spray the absorption liquid into the middle spraying area, and the spraying direction of the absorption liquid is configured to intersect with the gas flow direction in the middle spraying area; The lower absorption area includes a ceramic packing component (16). The ceramic packing component (16) is a multi-layer structure, which is used to increase the contact area between the absorption liquid and the gas.

2. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that The high-efficiency carbon capture device further includes a membrane separation component (18), a rectifying column (19), and an adsorption column (20); The gas outlet (12) of the absorption tower (1) is connected to the input end of the membrane separation component (18) through a transmission pipeline. The carbon dioxide output end of the membrane separation component (18) is connected to the input end of the rectifying column (19) through a transmission pipeline. The output end of the rectifying column (19) is connected to the input end of the adsorption column (20) through a transmission pipeline; A gas separation membrane is arranged inside the membrane separation component (18) for separating carbon dioxide in the gas. The rectifying column (19) is used to further rectify and purify the carbon dioxide gas. The adsorption column (20) is filled with an adsorbent inside for further removing impurities in the carbon dioxide gas.

3. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that The surface of the ceramic packing component (16) has a porous structure; Each layer of the ceramic packing component (16) is arranged as a regular corrugated plate structure, and the geometric shape of the corrugated plate (161) matches the shape of the ceramic packing component (16).

4. The high-efficiency carbon capture device for the cement industry according to claim 3, characterized in that, The surface of the corrugated plate (161) is provided with a hydrophilic coating structure.

5. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that The atomizing nozzles (151) are arranged circumferentially on the inner wall of the middle spraying area of the absorption tower (1) for the atomizing nozzles (151) to spray the absorption liquid from the periphery to the center of the middle spraying area; and / or, The multi-stage cross-flow spraying assembly (15) further includes an installation body (152) and a fixing bracket (153). The installation body (152) is installed at the middle position in the horizontal direction of the middle spraying area through the fixing bracket (153). Each atomizing nozzle (151) is installed on the side wall of the installation body (152) for the atomizing nozzles (151) to spray the absorption liquid from the center to the periphery of the middle spraying area.

6. The high-efficiency carbon capture device for the cement industry according to claim 5, characterized in that, The atomizing nozzles (151) of adjacent layers are arranged in a staggered manner in the transverse cross-section of the absorption tower (1); The atomizing nozzle (151) includes a frustum part (151-1) and a cylindrical part (151-2). The frustum part (151-1) is arranged on the end face of one end of the cylindrical part (151-2). A plurality of liquid spraying holes (151-3) are arranged on the inclined side wall and the top surface of the frustum part (151-1).

7. The high-efficiency carbon capture device for the cement industry according to claim 5, characterized in that, The atomizing nozzle (151) is further provided with an angle adjusting mechanism (154). The angle adjusting mechanism (154) includes a rotating shaft mechanism (154-1) and a telescopic driving mechanism (154-2). The atomizing nozzle (151) is rotationally connected to the inner wall of the absorption tower (1) or the installation body (152) through the rotating shaft mechanism (154-1). One end of the telescopic driving mechanism (154-2) is connected to the atomizing nozzle (151), and the other end is connected to the inner wall of the absorption tower or the installation body (152) for adjusting the spraying angle and spraying direction of the atomizing nozzle (151).

8. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that, The cyclone dust removal assembly (13) is located at the outer peripheral position of the upper pretreatment area. The cyclone dust removal assembly (13) includes a conical cylinder (131) for preliminarily separating gas and dust, and a dust collection bin (132) for collecting and storing the separated dust. The dust collection bin (132) is connected to the bottom dust outlet of the conical cylinder (131). The electrostatic dust removal assembly (14) is connected to the top gas outlet (12) of the conical cylinder (131) through a transmission pipeline; The electrostatic dust removal assembly (14) is located at the inner peripheral position of the upper pretreatment area so that the gas outlet area of the electrostatic dust removal assembly (14) corresponds to the middle area of the middle spraying area. An electrostatic adsorption mechanism (141) is arranged inside the electrostatic dust removal assembly (14).

9. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that, A first gas distributor (142) is provided at the outlet position of the electrostatic precipitator assembly (14) so that the gas can enter the middle spraying area evenly; A second gas distributor (162) and a third gas distributor (163) are provided between the layers of the ceramic packing assembly (16); The packing pores of each layer of the ceramic packing assembly (16) decrease layer by layer from top to bottom.

10. The high-efficiency carbon capture device for the cement industry according to claim 1, characterized in that The absorption tower (1) further includes a liquid-solid mixing assembly (17), and the liquid-solid mixing assembly (17) includes a collection tank (171) and a stirring assembly (172); The collection tank (171) is arranged at the bottom of the lower absorption area of the absorption tower (1) for receiving and collecting the absorption liquid; The stirring assembly (172) includes stirring blades (172-1) and a driving mechanism (172-2). The stirring blades (172-1) are located inside the collection tank (171), and the driving mechanism (172-2) is fixedly connected to the stirring blades (172-1) for driving the stirring blades (172-1) to rotate inside the collection tank (171).

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