High-efficiency low-resistance multi-stage multifunctional fixed bed flue gas purification integrated device

Abstract

The invention discloses an efficient low-resistance multi-stage multifunctional fixed bed flue gas purification integrated device, and relates to the technical field of flue gas purification, the efficient low-resistance multi-stage multifunctional fixed bed flue gas purification integrated device comprises a fixing frame and a control module, a mounting box is fixedly connected to the middle of the fixing frame, and openings are formed in the left side and the right side of the mounting box; the device comprises a mounting box, the inner wall of the mounting box is rotatably connected with two sealing plates through bearings, the two sealing plates are fixedly connected through a connecting frame, a plurality of flow guide plates are arranged between the two sealing plates, and the flow guide plates are honeycomb flow guide plates with nano active calcium sprayed in channels. The electric valve and the control module are cooperatively arranged to control the input and output states of airflow in a linkage mode, the flue gas temperature and the pollutant concentration can be monitored and adjusted in real time, the purification working condition is dynamically optimized, the air inlet direction is switched according to the purification effect, and the device has the advantages of being high in practicability and capable of stably and efficiently achieving flue gas purification.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and in particular to a high-efficiency, low-resistance, multi-stage, multifunctional fixed-bed flue gas purification integrated device. Background Art

[0002] Currently, flue gas from high-emission industries such as steel, coking, nonferrous metallurgy, and coal-fired power generation commonly contains a variety of pollutants, including sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter. Industrial enterprises generally use flue gas desulfurization, denitrification, and dust removal equipment. Existing flue gas purification technologies mainly include wet desulfurization, dry or semi-dry fixed bed / moving bed systems, and catalytic reduction denitrification systems. Among them, although the wet desulfurization process has a high desulfurization efficiency, it generally has problems such as severe equipment corrosion, high operating costs, and complex wastewater treatment, making it difficult to adapt to high-frequency and high-load operating conditions. The dry fixed bed structure is widely used in small and medium-sized enterprises due to its advantages of simple system and no wastewater discharge. However, the common structure mostly uses a single-stage or tandem reaction bed, with a short airflow path and low disturbance level, making it difficult to achieve both high-efficiency removal and low-energy operation. In addition, the guide structure is prone to dust accumulation and clogging, resulting in increased operating resistance and reduced reagent utilization. Existing Chinese patent CN114904383A discloses a fixed-bed desulfurization system that efficiently utilizes a desulfurizer. This device utilizes a fixed-bed desulfurization system for a desulfurizer. The desulfurization column of the desulfurization tower used in the fixed-bed desulfurization system is hollow, with an inner purification chamber inside and an inner baffle. The inner purification chamber is designed to be divided into compartments, so that sulfur-containing flue gas can pass through the desulfurizer in the same desulfurization column twice. Compared with traditional desulfurization towers with horizontal air intake, one desulfurization column is less configured, the volume of a single reaction tower is reduced, the flue gas distribution is more uniform, the utilization rate of the desulfurizer is improved, and the overall installation of the desulfurization tower can be realized. However, this system and similar systems often lack the ability to monitor and control the flue gas flow state, temperature changes, and pollutant concentrations in real time, and cannot dynamically adjust the reaction process according to actual working conditions, resulting in large fluctuations in treatment efficiency and insufficient adaptability. Therefore, there is an urgent need for a multifunctional fixed-bed flue gas purification device with a reasonable structure, high functional integration, low operating resistance and adaptive control capability, which can improve the system operation stability and economy while meeting ultra-low emission standards and achieve coordinated control of pollutants. Summary of the Invention

[0003] The object of the present invention is to provide a high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device, comprising a fixed frame and a control module, a mounting box fixedly connected to the middle of the fixed frame, openings being provided on both the left and right sides of the mounting box, the inner wall of the mounting box being rotatably connected to two sealing plates via bearings, the two sealing plates being fixedly connected via a connecting frame, a number of guide plates being arranged between the two sealing plates, the guide plates being honeycomb guide plates with nano-active calcium sprayed on the channel, air distribution ducts being fixedly connected to the openings on both sides of the mounting box, a reversing mechanism being provided on the outside of the mounting box, and a rotating mechanism being provided on the upper side of the mounting box.

[0005] According to the above technical solution, an even number of guide plates are arranged inside the sealing plate, and two adjacent guide plates are symmetrically arranged. A hexagonal channel inclined at thirty degrees is opened inside the guide plate. Several internal channels of the guide plates are interconnected, and the outer wall of the guide plate is fixedly connected to the inner wall of the sealing plate.

[0006] According to the above technical solution, one end of the air distribution duct is fixedly connected to the inner wall of the opening on the installation box, and a plurality of circular holes are opened on the other side of the air distribution duct, and the air distribution duct is used to evenly distribute the airflow.

[0007] According to the above technical solution, the reversing mechanism includes a first air duct and a second air duct, one end of the first air duct and one end of the second air duct are fixedly connected to the opening on one side of the installation box, the first air duct and the second air duct are provided on both sides of the installation box, the two first air ducts and the two second air ducts are connected at one end away from the installation box, and the first air duct and the second air duct are respectively provided with an electric valve inside, and the electric valve is electrically connected to the control module.

[0008] According to the above technical solution, two groups of wind speed detection modules and nitrogen detection modules are provided on the left and right sides of the installation box, and the wind speed detection modules and nitrogen detection modules are electrically connected to the control module, and the detection ends of the wind speed detection modules and nitrogen detection modules are both located between the sealing plate and the inner wall of the installation box.

[0009] According to the above technical solution, the rotating mechanism includes a motor, which is located on the upper side of the mounting box. The outer wall of the mounting box is fixedly connected to the outer wall of the motor. The output end of the motor is fixedly connected to a gear. A transmission groove is provided in an annular shape on the outer wall of the connecting frame. One side of the gear passes through the mounting box and extends to the inner wall of the mounting box to engage with the inner wall of the transmission groove.

[0010] According to the above technical solution, the motor is electrically connected to the control module, and the motor is used to drive the connecting frame to rotate. The outer walls of several of the guide plates form upper and lower protrusions, and the interior of the installation box is filled with insulation material on the outside of the guide plates.

[0011] Compared with the existing technology, the beneficial effects achieved by the present invention are: by providing a guide plate and an air distribution duct, the present invention can make the flue gas undergo multiple deflections and disturbances through the inclined hexagonal channel after entering the installation box, effectively prolonging the gas-solid contact time; by providing a guide plate with a nano-active calcium coating, the synergistic reaction of desulfurization, denitrification and dust removal can be achieved, the pollutant capture efficiency is improved, and the operating resistance is reduced.

[0012] By setting up a wind speed detection module and a nitrogen detection module, and coordinating the electric valve and the control module to control the airflow input and output status, the flue gas temperature and pollutant concentration can be monitored and adjusted in real time, the purification conditions can be dynamically optimized, and the air inlet direction can be switched according to the purification effect.

[0013] By setting up a motor, gears and transmission grooves in the rotating mechanism, the connecting frame is driven to rotate, driving the sealing plate and the guide plate to rotate synchronously. Combined with the raised structure of the guide plate and the filling insulation material, it can disturb the insulation layer to prevent sedimentation, maintain thermal stability and adjust the reaction angle to improve purification efficiency.

[0014] The wind direction switching function is achieved by providing a reversing mechanism in conjunction with the control module, and the rotating mechanism is linked to periodically drive the guide plate to rotate, so that the condensation by-products attached to the surface of the guide plate can fall off and be discharged with the airflow, preventing structural blockage and agent passivation, and effectively extending the equipment service life and maintenance interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the split structure of the present invention; Figure 3 It is a partial structural schematic diagram of the present invention; Figure 4 It is a schematic structural diagram of the reversing mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the installation box of the present invention; Figure 6 Schematic diagram of the cross-sectional structure of the guide plate of the present invention; In the figure: 1. Fixing frame; 2. Mounting box; 3. Sealing plate; 4. Connecting frame; 5. Guide plate; 6. Air distribution duct; 7. Reversing mechanism; 8. Rotating mechanism; 701. First air duct; 702. Second air duct; 703. Electric valve; 704. Wind speed detection module; 705. Nitrogen detection module; 801. Motor; 802. Gear; 803. Transmission slot. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figure 1-5 The present invention provides a high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device, comprising a fixing frame 1 and a control module matched therewith. A mounting box 2 is fixedly connected to the middle of the fixing frame 1. Openings are respectively provided on the left and right sides of the mounting box 2 for realizing the inlet and outlet of flue gas. The inner wall of the mounting box 2 is rotatably connected to two sealing plates 3 through a bearing structure. The two sealing plates 3 are fixedly connected by a connecting frame 4 to form a closed and stable support skeleton. A plurality of guide plates 5 are arranged between the two sealing plates 3. The guide plates 5 are honeycomb guide plates with nano-active calcium sprayed on the inner wall of the channel. A hexagonal channel with an inclination angle of thirty degrees is provided inside the structure, and multiple The channels between the guide plates 5 are interconnected to form a continuous multi-stage purification path. The outer wall of the guide plate 5 is stably fixed to the inner wall of the sealing plate 3 to form a closed airflow channel, thereby improving the mass transfer efficiency. The openings at both ends of the installation box 2 are respectively fixedly connected to the air distribution pipe 6. A plurality of circular holes are provided on one side of the air distribution pipe 6 to achieve uniform distribution of the airflow. This structure forms a synergistic reaction path through nano-active calcium and the inclined hexagonal channel, extending the gas-solid contact time to 2.5 seconds for the installation box, thereby effectively improving the pollutant adsorption efficiency. In addition, several devices can be vertically stacked through the connection of the fixing frame 1, and several installation boxes 2 are connected in series through pipelines to form an adjustable multi-stage purification path. After the device is started, the external flue gas is first guided by the fan into the left opening of the installation box 2. Before entering the interior of the installation box 2, the air flow passes through the air distribution pipe 6. The air distribution pipe 6 is provided with multiple circular holes, which can perform preliminary rectification and distribution on the incoming flow, so that the gas enters the interior of the installation box body evenly. After entering the installation box 2, the gas is guided by multiple guide plates 5. These guide plates 5 are honeycomb guide plates with nano-active calcium sprayed on the channel surface. The guide plates are inclined at 30 degrees and have a hexagonal channel structure. The gas continuously hits the inner wall of the hexagonal channel during the flow process, which increases gas disturbance and extends the path, thereby improving the contact efficiency with the active material. Under the impact of airflow, the nano-active calcium coating undergoes physical adsorption and chemical reaction with SO2, NOx and particulate matter therein, realizing simultaneous desulfurization, denitrification and dust removal. Since the channels between the multiple guide plates 5 are interconnected, the airflow presents a segmented flow form, the overall path becomes longer, and the contact time is extended to more than 2.5 seconds in the installation box, which is conducive to the deep capture of pollutants. The treated gas is evenly discharged from the air distribution duct 6 on the other side. The whole process has low resistance and high mass transfer efficiency, and can continuously and stably complete the efficient purification of flue gas.

[0018] Example 2: Please refer to Figure 1-5 , based on the first embodiment, the present invention provides a technical solution: a reversing mechanism 7 is arranged outside the installation box 2, for adjusting the airflow path and realizing dynamic control of the purification efficiency, one end of the first air duct 701 and one end of the second air duct 702 are fixedly connected to the opening on one side of the installation box 2, and the first air duct 701 and the second air duct 702 are provided on both sides of the installation box 2. The two first air ducts 701 and the two second air ducts 702 are connected to each other at one end away from the installation box 2 to form a stable airflow channel, and the first air duct 701 and the second air duct 702 are both provided with an electric valve 703 inside. The electric valve 703 is a remotely controllable electric valve electrically connected to the control module for realizing real-time adjustment of the airflow input and output, and two sets of wind speed detection modules 7 are also provided on the left and right sides of the installation box 2. 04 and nitrogen detection module 705, respectively, are used to monitor the wind speed and nitrogen oxide content of the airflow passing through the device, and are both communicatively connected to the control module. The detection ends of the wind speed detection module 704 and the nitrogen detection module 705 are located between the sealing plate 3 and the inner wall of the installation box 2, that is, the main path area of ​​the airflow channel. As the airflow passes through the inclined honeycomb structure guide plate 5, it will repeatedly collide along the inner wall of the hexagonal channel. Especially under the setting of the inclination angle, the collision path presents a left-right alternating steering effect, which effectively increases the contact area between the gas-solid mixture and the reagent, and improves the desulfurization and denitrification efficiency. The control module automatically adjusts the opening and closing state of the electric valve 703 according to the real-time data of the wind speed detection module 704 and the nitrogen detection module 705, realizes adaptive airflow management, and improves the overall response speed and purification performance of the system; After the device is started in this embodiment, the smoke still enters the interior of the installation box 2 through the left air distribution duct 6 and maintains a uniform flow state under the action of the air distribution duct. At this time, the first air duct 701 provided at the front left side of the installation box 2 serves as the air inlet duct, the electric valve 703 on the first air duct 701 at the front right side of the installation box 2 is in a closed state, the second air duct 702 at the rear right side of the installation box 2 serves as the exhaust duct, and the electric valve 703 on the second air duct 702 at the rear left side of the installation box 2 is in a closed state. At this time, the airflow forms a complete passage. When the airflow passes through the interior of the deflector 5, due to inertia, the windward surface of the inner wall of the deflector 5 will come into contact with the airflow more, thereby making it react faster. After the guide plate 5 has been working for a long time, the purification effect decreases due to the adhesion of the inner wall and the advancement of the reaction process, which will cause the nitrogen detection module 705 on the right side to detect an increase in nitrogen content. At this time, the electric valves 703 on the four first air ducts 701 and the second air duct 702 are triggered again, forming an air flow input by the first air duct 701 at the front right and output by the second air duct 702 at the rear left, thereby reversing the direction of the air flow through the inside of the guide plate 5, changing the windward side of the guide plate 5, thereby ensuring its purification efficiency and extending its service life.

[0019] Example 3: Please refer to Figure 1-6 On the basis of the first and second embodiments, the present invention provides a technical solution: the rotating mechanism 8 is arranged on the upper side of the installation box 2, including a motor 801, the motor 801 is a high-torque motor, the outer wall of the motor 801 is fixedly connected to the outer wall of the installation box 2, and its output end is connected to the gear 802, the gear 802 is a driving gear, and the ring is engaged with the transmission groove 803 opened on the outer wall of the connecting frame 4, thereby realizing the rotation drive of the connecting frame 4. As the connecting frame 4 rotates, the connected sealing plate 3 and the guide plate 5 rotate synchronously as a whole, driving the internal structure of the installation box 2 to realize the rotational disturbance motion. The outer wall of the guide plate 5 is designed as an upper and lower staggered convex structure, which can continuously stir the insulation material filled in the installation box 2 in combination with the rotating action to prevent the insulation filler from settling or agglomerating in a static state, thereby stabilizing the distribution of the insulation layer and improving thermal efficiency. By adjusting the spatial angles of the sealing plate 3, the connecting frame 4 and the multiple guide plates 5, the rotation speed of the guide plate 5 can be increased or decreased to increase or decrease the resistance of the airflow passing through the guide plate 5, further improving the residence time and reaction efficiency of the gas in the active area, and achieving synergistic efficiency of desulfurization, denitrification and dust removal functions. During the operation of the equipment, the motor 801 is controlled to start, driving the output gear 802 to rotate. The gear 802 engages with the transmission groove 803 on the outer wall of the connecting frame 4, driving the entire connecting frame 4 structure to rotate. Since the connecting frame 4 is connected to the two sealing plates 3 and several guide plates 5, the rotation process simultaneously drives the several guide plates 5, the connecting frame 4, and the sealing plates 3 to rotate synchronously around the central axis. This rotational motion not only causes the guide structure inside the device to continuously change its angle, disrupting the static flow field distribution and increasing the intensity of local disturbances, but also adjusts the angle of the guide plate relative to the main airflow direction, thereby dynamically changing the reaction path and contact efficiency. In addition, the outer wall of the guide plate 5 is inclined to form a convex structure up and down, and the rotation of the guide plate 5 drives the heat preservation material wrapped outside the guide plate 5 to be stirred uniformly, so that the deposition and hardening of the filler due to long-term static state are prevented, the uniform distribution of the heat preservation layer and the stable heat preservation performance are ensured, the purification efficiency of the equipment is maintained through the rotation and stirring, the reaction activity and system stability of the whole purification process are enhanced, and finally, the airflow after dynamic adjustment is discharged from the outlet, and the whole process realizes the linkage optimization of temperature control, disturbance, flow guide and reaction efficiency.

[0020] Embodiment four: please refer to Figure 1-6 On the basis of the embodiments one, two and three, the application provides a technical solution: after the device runs for a period of time, the control module judges the risk of deposition of condensation by-products on the surface of the internal guide plate 5 according to the cumulative running time or the change of gas flow rate, and then starts the periodic cleaning mechanism, first controls the electric valve 703 to switch the conduction direction of the first air pipe 701 and the second air pipe 702, so that the airflow reverses through the inside of the mounting box 2 in a short time; at the same time, the motor 801 drives the connecting frame 4 to rotate continuously, so that micro-disturbance is generated in the inside of the plurality of guide plates 5; Under the joint action of the airflow direction switching and the rotation disturbance, the scaling and reaction by-products on the surface of the inclined honeycomb guide plate 5 are effectively washed or shaken off and discharged from the system with the airflow, so as to avoid the channel blockage or drug failure caused by scaling blockage in long-term use. This function can be automatically executed according to the set period, so as to ensure the long-term efficient and stable operation of the system, and significantly prolong the equipment maintenance interval and the service life of the drug.

[0021] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0022] Finally, it should be noted that: the above only describes the preferred embodiments of the application, and is not used to limit the application, although the application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device, comprising a fixed frame (1) and a control module, characterized in that: The middle of the fixing frame (1) is fixedly connected to an installation box (2), and openings are provided on both the left and right sides of the installation box (2). The inner wall of the installation box (2) is rotatably connected to two sealing plates (3) through bearings, and the two sealing plates (3) are fixedly connected through a connecting frame (4). A plurality of guide plates (5) are provided between the two sealing plates (3), and the guide plates (5) are honeycomb guide plates with nano-active calcium sprayed in the channel. Air distribution pipes (6) are fixedly connected to the openings on both sides of the installation box (2), a reversing mechanism (7) is provided on the outside of the installation box (2), and a rotating mechanism (8) is provided on the upper side of the installation box (2).

2. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 1 is characterized by: An even number of guide plates (5) are provided inside the sealing plate (3), and two adjacent guide plates (5) are symmetrically arranged. A hexagonal channel inclined at thirty degrees is provided inside the guide plate (5), and the internal channels of the guide plates (5) are interconnected, and the outer wall of the guide plate (5) is fixedly connected to the inner wall of the sealing plate (3).

3. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 2 is characterized by: One end of the air distribution pipe (6) is fixedly connected to the inner wall of the upper opening of the installation box (2), and a plurality of circular holes are opened on the other side of the air distribution pipe (6). The air distribution pipe (6) is used to evenly distribute the airflow.

4. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 3 is characterized by: The reversing mechanism (7) comprises a first air duct (701) and a second air duct (702), one end of the first air duct (701) and one end of the second air duct (702) are fixedly connected to an opening on one side of the installation box (2), the first air duct (701) and the second air duct (702) are provided on both sides of the installation box (2), the two first air ducts (701) and the two second air ducts (702) are connected at one end away from the installation box (2), and the first air duct (701) and the second air duct (702) are provided inside with an electric valve (703), and the electric valve (703) is electrically connected to the control module.

5. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 4 is characterized by: Two groups of wind speed detection modules (704) and nitrogen detection modules (705) are provided on the left and right sides of the installation box (2), and the wind speed detection modules (704) and nitrogen detection modules (705) are both electrically connected to the control module, and the detection ends of the wind speed detection modules (704) and nitrogen detection modules (705) are both located between the sealing plate (3) and the inner wall of the installation box (2).

6. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 5 is characterized by: The rotating mechanism (8) includes a motor (801), the motor (801) is located on the upper side of the installation box (2), the outer wall of the installation box (2) is fixedly connected to the outer wall of the motor (801), the output end of the motor (801) is fixedly connected to a gear (802), the outer wall of the connecting frame (4) is annularly provided with a transmission groove (803), and one side of the gear (802) passes through the installation box (2) and extends to the inner wall of the installation box (2) to engage with the inner wall of the transmission groove (803).

7. The high-efficiency, low-resistance, multi-stage, multi-functional fixed-bed flue gas purification integrated device according to claim 6, characterized in that: The motor (801) is electrically connected to the control module, and the motor (801) is used to drive the connecting frame (4) to rotate. The outer walls of the guide plates (5) form upper and lower protrusions, and the interior of the installation box (2) is filled with insulation material at the outer sides of the guide plates (5).

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