A multi-stage circulating exhaust gas decarburization treatment system

Abstract

The application discloses a multi-stage circulating waste gas decarburization treatment system, and relates to the field of waste gas decarburization, which comprises a first dust removal circulating unit, a second dehydration circulating unit and a third decarburization circulating unit. The first dust removal circulating unit comprises a physical dust removal tower, a physical filtration tower and a spraying tower which are connected in sequence along the flow path of flue gas. The second dehydration circulating unit comprises a desulfurization tower and a dehumidifier which are connected in sequence along the flow path of flue gas. The spraying tower is connected with the desulfurization tower through a first pipeline. The first pipeline is connected with the physical dust removal tower through a first circulating pipeline. The third decarburization circulating unit comprises an activated carbon adsorption tower, a catalytic conversion decarburization tower and an exhaust chimney which are connected in sequence along the flow path of flue gas. The dehumidifier is connected with the activated carbon adsorption tower through a second pipeline. The second pipeline is connected with the dehumidifier through a second circulating pipeline. The exhaust chimney is connected with the activated carbon adsorption tower through a third circulating pipeline. The application solves the problems of poor multi-stage cooperation, high operation and maintenance cost and low standard rate in the existing waste gas treatment system.

Description

Technical Field

[0001] This invention relates to the field of waste gas carbon reduction technology, specifically a multi-stage circulating waste gas carbon reduction system. Background Technology

[0002] Industrial waste gas typically contains high concentrations of dust, sulfides, and carbon components (such as CO2 and hydrocarbons). Its emissions not only exacerbate environmental problems like smog and acid rain but also make it a key target for carbon emission control. Currently, waste gas treatment often employs a series process of "dust removal-desulfurization-dehydration-carbon reduction." However, existing technologies have significant shortcomings in multi-stage synergistic treatment, circulation control, and treatment efficiency, making it difficult to meet stringent environmental standards and carbon reduction requirements. Specifically: First, the synergy of multi-stage treatment is poor, lacking a targeted circulation mechanism. In existing systems, dust removal, dehydration, and carbon reduction units mostly operate independently, without precise linkage and circulation control between each stage. For example, if the dust concentration still exceeds the standard after dust removal, the entire system must be shut down for rework or directly enter the next stage, causing a sharp drop in efficiency in subsequent desulfurization and adsorption towers due to dust adhesion. If humidity control is not up to standard in the dehydration stage, high-humidity flue gas entering the carbon reduction unit will cause catalyst deactivation. However, existing technologies cannot directionally return the substandard gas to the dehydration unit for reprocessing, and can only maintain operation by sacrificing treatment efficiency. Secondly, traditional dust removal processes involve first spraying to remove large-diameter dust from the exhaust gas, followed by filtration of small-diameter dust by a filter tower. However, this spray-then-filtration method increases the humidity of the exhaust gas, making the dust particles more prone to adhesion and clogging. This increases the burden on the filter screen, leading to more frequent clogging and impacting the exhaust gas treatment efficiency. Thirdly, current screen clogging requires manual disassembly and cleaning. This is mainly because existing screens have a one-piece structure, causing dust to simultaneously entangle and adhere to both the horizontal and vertical screen wires. This makes it difficult for the air pressure or spray cleaning provided by the filter tower to achieve a good unclogging effect, requiring regular manual disassembly and maintenance. This labor-intensive process also affects the exhaust gas treatment efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-stage circulating waste gas carbon reduction treatment system to solve the deficiencies of the prior art.

[0004] The objective of this invention is achieved through the following technical solution: a multi-stage circulating waste gas carbon reduction treatment system, comprising a primary dust suppression circulation unit, a secondary dehydration circulation unit, and a tertiary carbon reduction circulation unit. The primary dust suppression circulation unit includes a physical dust suppression tower, a physical filter tower, and a spray tower connected sequentially along the flue gas flow path. The secondary dehydration circulation unit includes a desulfurization tower and a dehumidifier connected sequentially along the flue gas flow path. The outlet of the spray tower is connected to the inlet of the desulfurization tower via a first pipe. A dust detector is installed on the first pipe. The first pipe is connected to the inlet pipe of the physical dust suppression tower via a primary circulation pipe. The dust detector is arranged between the spray tower and the primary... Between the circulation pipes, the three-stage carbon reduction circulation unit includes an activated carbon adsorption tower, a catalytic conversion carbon reduction tower, and an emission chimney connected sequentially along the flue gas flow path. The outlet of the dehumidifier is connected to the inlet of the activated carbon adsorption tower through a second pipe. The second pipe is connected to the inlet of the dehumidifier through a secondary circulation pipe. A humidity detector is installed on the second pipe and is located between the secondary circulation pipe and the dehumidifier. The outlet of the catalytic conversion carbon reduction tower is connected to the inlet of the activated carbon adsorption tower through a tertiary circulation pipe. A flue gas analyzer is installed on the tertiary circulation pipe, and the sampling port of the flue gas analyzer is located between the catalytic conversion carbon reduction tower and the tertiary circulation pipe.

[0005] Furthermore, the physical dust suppression tower is equipped with an inclined plate dust suppression assembly. The air inlet pipe of the physical dust suppression tower is located below the inclined plate dust suppression assembly. The inclined plate dust suppression assembly includes several inclined dust suppression plates. The inclined plates are arranged sequentially along the length of the physical dust suppression tower. Several corrugated dust blocking plates are fixed to the left and right end faces of the inclined plates. The corrugated dust blocking plates are spaced apart along the width of the physical dust suppression tower. The corrugated dust blocking plates are continuously bent into a corrugated shape along the height of the physical dust suppression tower. The corrugated dust blocking plates of two adjacent inclined plates contact each other to form a corrugated dust blocking pipe.

[0006] Furthermore, the dust-suppressing inclined plate is provided with a dust discharge chamber, and a wavy path is formed between two adjacent wavy dust-blocking plates on the dust-suppressing inclined plate. The wavy path has a dust discharge hole at the bending and changing position, and the dust discharge hole is connected to the dust discharge chamber. The side wall of the physical dust-suppressing tower is connected to a main dust discharge pipe, and the bottom of the dust-suppressing inclined plate is connected to a dust discharge hose, which is connected to the main dust discharge pipe.

[0007] Furthermore, the circulating tower is provided with a gas chamber and a dust storage chamber from top to bottom. The gas chamber is connected to the dust storage chamber through a dust discharge pipe. A solenoid valve is installed on the dust discharge pipe. The main dust discharge pipeline is connected to the gas chamber. An air pump is installed on the main dust discharge pipeline. The gas chamber is connected to the air inlet pipe of the physical dust reduction tower through a circulating pipeline.

[0008] Furthermore, sliding columns are fixed on both sides of the dust-suppressing inclined plate, and a rectangular inclined groove is opened at the position where the sliding columns are set in the physical dust-suppressing tower. The sliding columns are slidably set in the rectangular inclined groove. Sealing plates are fixed on the upper and lower ends of the sliding columns. The sidewall of the sealing plate contacts the sidewall of the rectangular inclined groove. The end of the sealing plate away from the sliding column slides through the physical dust-suppressing tower. A cleaning component is set above the inclined plate dust-suppressing assembly. The cleaning component includes two horizontally arranged high-pressure air pipes. The dust-suppressing inclined plate is located between the two high-pressure air pipes. Several high-pressure air jet holes are opened along the axial direction of the sidewall of the high-pressure air pipes near the dust-suppressing inclined plate.

[0009] Furthermore, the outer wall of the physical dust suppression tower is provided with a dust suppression driving mechanism, which includes a driving inclined plate, a sliding seat, and a docking cone rod. The driving inclined plate is slidably installed on the physical dust suppression tower, the driving inclined plate is perpendicular to the rectangular inclined groove, and the moving path of the driving inclined plate is parallel to the rectangular inclined groove. A sliding seat is installed on the driving inclined plate, and the moving path of the sliding seat is perpendicular to the rectangular inclined groove. A docking cone rod is provided at one end of the sliding seat near the sliding column, and a docking hole is opened at one end of the sliding column near the sliding seat. The sliding seat is connected to the sliding column through the cooperation of the docking cone rod and the docking hole.

[0010] Furthermore, the physical filtration tower is provided with an upper chamber and a lower chamber in the center. The diameter of the lower chamber is larger than that of the upper chamber. A combined fine sieve mechanism is provided in the upper chamber. The combined fine sieve mechanism has the freedom to move along the height direction of the physical filtration tower. The combined fine sieve mechanism includes an upper annular sieve disc and a lower annular sieve disc. Several transverse sieve wires are fixed at equal intervals at the bottom of the upper annular sieve disc. Several longitudinal sieve wires are fixed at equal intervals at the top of the lower annular sieve disc. The longitudinal sieve wires contact the transverse sieve wires to form a mesh-like fine sieve.

[0011] Furthermore, a pneumatic cleaning mechanism is provided in the lower chamber. The pneumatic cleaning mechanism includes a movable cleaning pipe and a cleaning drive rod. The length of the movable cleaning pipe is greater than the inner diameter of the upper annular screen. A cylinder is horizontally installed on the side wall of the physical filter tower. The telescopic shaft of the cylinder is connected to one end of the cleaning drive rod through a connecting rod. The other end of the cleaning drive rod passes through the lower chamber and connects to the movable cleaning pipe. The side wall of the movable cleaning pipe has several lower air pressure holes and several upper air pressure holes along its own axial direction. The upper air pressure holes are inclined upwards, and the lower air pressure holes are inclined downwards.

[0012] Furthermore, the top surface of the upper annular screen is connected to two hollow tubes, which are symmetrically arranged about the center of the upper annular screen. The lower annular screen is connected to two drive rods. The two hollow tubes pass through the top of the physical filtration tower and are connected together through the lower drive plate. The two drive rods pass through the top of the two hollow tubes respectively and are connected together through the upper drive plate. The physical filtration tower is vertically equipped with a first drive cylinder and a second drive cylinder. The telescopic shaft of the first drive cylinder is connected to the lower drive plate, and the telescopic shaft of the second drive cylinder moves through the lower drive plate and is connected to the upper drive plate.

[0013] Furthermore, the primary dust suppression circulation unit also includes an indirect cooling box, in which a U-shaped circulating cooling pipe is installed. The U-shaped circulating cooling pipe is immersed in cold water in the indirect cooling box. One end of the U-shaped circulating cooling pipe is connected to the flue gas emission pipe, and the other end is connected to the air inlet pipe of the physical dust suppression tower. The side wall of the indirect cooling box is connected to a water inlet pipe and a water outlet pipe.

[0014] The beneficial effects of this invention are:

[0015] 1. The dust detector on the first pipeline can monitor the dust concentration at the spray tower outlet in real time. If the concentration exceeds the standard, the substandard flue gas is directionally returned to the physical dust reduction tower for reprocessing through the primary circulation pipe. This prevents flue gas with high dust concentration from entering the desulfurization tower, avoids dust adhering to the desulfurization tower packing or the surface of subsequent adsorbents, improves desulfurization efficiency, and slows down the decay rate of activated carbon adsorption capacity, extending its service life. 2. The humidity detector on the second pipeline can accurately control the humidity of the flue gas at the dehumidifier outlet. If the humidity exceeds the standard, it is returned to the dehumidifier for secondary dehydration through the secondary circulation pipe, effectively preventing high humidity flue gas from causing catalytic degradation. The catalyst in the catalytic conversion and carbon reduction tower is deactivated, which improves the catalyst's service life and reduces the frequency of replacement. The flue gas analyzer monitors the carbon component concentration at the outlet of the catalytic conversion and carbon reduction tower in real time. If it does not meet the standard, it is returned to the activated carbon adsorption tower for secondary carbon reduction through a three-stage circulation pipe, avoiding direct emission or return to the front end of the system. This ensures that the emitted flue gas always meets the emission requirements, and reduces energy consumption compared to "full-process return". It takes into account both environmental compliance and energy saving. In summary, through "targeted circulation control + structural innovation and optimization", it specifically solves the problems of "poor multi-stage coordination, high operation and maintenance costs, and low compliance rate" in the existing waste gas treatment system.

[0016] 2. By first removing large-diameter dust through physical sedimentation, then removing small-diameter dust through filtration, and finally reducing dust through spraying, the workload of the physical filter tower is reduced. This effectively prevents dust from agglomerating and adhering to the filter screen due to the high humidity of the flue gas after spraying, greatly reducing the clogging frequency of the physical filter tower, reducing the frequency of unclogging operations, and ensuring continuous efficiency of waste gas treatment.

[0017] 3. The corrugated dust-blocking plates of adjacent inclined dust-suppressing plates form corrugated dust-blocking pipes, which can extend the flue gas flow path and allow dust to be captured by inertial collision and gravity settling, greatly reducing the cleaning frequency of the inclined plate dust-suppressing components. The inclined plate dust-suppressing components can quickly remove large-diameter dust in the exhaust gas, effectively relieving the working pressure of the physical filter tower. Moreover, the dust removal process of dust suppression-filtration-spraying can quickly and effectively remove dust from the exhaust gas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the principle of a multi-stage circulating waste gas carbon reduction treatment system according to the present invention.

[0019] Figure 2 This is a schematic diagram of the inclined plate dust suppression component in a multi-stage circulating waste gas carbon reduction treatment system of the present invention;

[0020] Figure 3 This is a top view of the inclined plate dust suppression component in a multi-stage circulating waste gas carbon reduction treatment system of the present invention;

[0021] Figure 4 for Figure 3 Sectional view along line AA;

[0022] Figure 5 This is a schematic diagram of the internal structure of the physical dust reduction tower in a multi-stage circulating waste gas carbon reduction treatment system of the present invention;

[0023] Figure 6 This is a schematic diagram of the external structure of a physical dust suppression tower in a multi-stage circulating waste gas carbon reduction treatment system according to the present invention. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the external structure of a physical dust suppression tower in a multi-stage circulating waste gas carbon reduction treatment system according to the present invention. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the structure of the circulation tower in a multi-stage circulating waste gas carbon reduction treatment system of the present invention;

[0026] Figure 9 This is a schematic diagram of the internal structure of the physical filter tower in a multi-stage circulating waste gas carbon reduction treatment system of the present invention.

[0027] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0028] Figure 11 This is a schematic diagram of the external structure of the physical filter tower in a multi-stage circulating waste gas carbon reduction treatment system of the present invention.

[0029] Figure 12This is a cross-sectional schematic diagram of a moving cleaning pipe in a multi-stage circulating waste gas carbon reduction treatment system of the present invention;

[0030] Figure 13 This is a schematic diagram of the internal structure of the indirect cooling box in a multi-stage circulating waste gas carbon reduction treatment system of the present invention.

[0031] In the diagram, 1-Physical dust suppression tower, 2-Physical filtration tower, 3-Spray tower, 4-Desulfurization tower, 5-Dehumidifier, 6-First pipeline, 7-Dust detector, 8-First-stage circulation pipe, 9-Activated carbon adsorption tower, 10-Catalytic conversion carbon reduction tower, 11-Emission chimney, 12-Second pipeline, 13-Second-stage circulation pipe, 14-Humidity detector, 15-Third-stage circulation pipe, 16-Flue gas analyzer, 17-Dust suppression inclined plate, 18-Corrugated dust barrier plate, 19-Dust discharge chamber, 20-Dust discharge hole, 21-Main dust discharge pipeline, 22-Dust discharge hose, 23-Circulation tower, 24-Gas chamber, 25-Dust storage chamber, 26-Dust discharge pipe, 27-Circulation pipeline, 28-Sliding column, 29-Rectangular inclined chute, 30-Sealing slide plate, 31-High-pressure gas pipe 32-High-pressure jet hole, 33-Drive inclined plate, 34-Sliding seat, 35-Docking cone rod, 36-Docking hole, 37-Upper chamber, 38-Lower chamber, 39-Upper annular screen plate, 40-Lower annular screen plate, 41-Transverse screen wire, 42-Vertical screen wire, 43-Moving cleaning pipe, 44-Cleaning drive rod, 45-Cylinder, 46-Lower air pressure hole, 47-Upper air pressure hole, 48-Hollow tube, 49-Drive vertical rod, 50-Lower drive plate, 51-Upper drive plate, 52-First drive cylinder, 53-Second drive cylinder, 54-Indirect cooling box, 55-U-shaped surrounding cooling pipe, 56-First linear drive module, 57-Second linear drive module, 58-Docking cylinder, 59-Upper mounting plate, 60-Lower mounting plate. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0033] Example 1

[0034] like Figures 1 to 13As shown, a multi-stage circulating exhaust gas carbon reduction treatment system includes a primary dust suppression circulation unit, a secondary dehydration circulation unit, and a tertiary carbon reduction circulation unit. The primary dust suppression circulation unit includes a physical dust suppression tower 1, a physical filter tower 2, and a spray tower 3 connected sequentially along the flue gas flow path. The secondary dehydration circulation unit includes a desulfurization tower 4 and a dehumidifier 5 connected sequentially along the flue gas flow path. The outlet of the spray tower 3 is connected to the inlet of the desulfurization tower 4 via a first pipe 6. A dust detector 7 is installed on the first pipe 6. The first pipe 6 is connected to the inlet pipe of the physical dust suppression tower 1 via a primary circulation pipe 8. The dust detector 7 is arranged between the spray tower 3 and the primary circulation pipe 8. The tertiary carbon reduction circulation unit includes an activated carbon adsorption tower 9 and a catalytic conversion carbon reduction tower 1 connected sequentially along the flue gas flow path. The carbon tower 10 and the exhaust chimney 11 are connected. The outlet of the dehumidifier 5 is connected to the inlet of the activated carbon adsorption tower 9 via a second pipe 12. The second pipe 12 is connected to the inlet of the dehumidifier 5 via a secondary circulation pipe 13. A humidity detector 14 is installed on the second pipe 12 and is located between the secondary circulation pipe 13 and the dehumidifier 5. The outlet of the catalytic conversion carbon reduction tower 10 is connected to the inlet of the activated carbon adsorption tower 9 via a tertiary circulation pipe 15. A flue gas analyzer 16 is installed on the tertiary circulation pipe 15 and its sampling port is located between the catalytic conversion carbon reduction tower 10 and the tertiary circulation pipe 15. The flue gas, combustion exhaust gas, and other waste gases first pass through a primary dust reduction circulation unit to remove dust, ash, and other solid impurities from the waste gas, and then pass through a secondary dehydration circulation unit. The unit removes water vapor from the exhaust gas and performs desulfurization treatment. Finally, the carbon content in the exhaust gas is reduced through a three-stage carbon reduction cycle unit to meet the standard emission standards before being discharged. Specifically, the exhaust gas first enters the physical dust suppression tower 1. Utilizing the velocity difference between the airflow and solid impurities, combined with the gravity of the solid impurities, the solid impurities gradually accumulate and settle. This step effectively removes a large amount of large-diameter solid impurities from the exhaust gas, preventing them from entering the subsequent physical filter tower 2, thus relieving the workload of the filtration station and reducing its clogging frequency. The dust-treated exhaust gas then enters the physical filter tower 2, where small-diameter impurities are filtered out through a screen, further removing solid impurities. Finally, it enters the spray tower 3 at the end of the first-stage dust suppression cycle unit. Inside the spray tower 3, atomized water vapor adsorbs and settles tiny solid impurities in the exhaust gas, effectively removing solid particles from the exhaust gas through the primary dust suppression circulation unit. The exhaust gas then enters the secondary dehydration circulation unit for purification. Before entering the secondary dehydration circulation unit, the dust concentration in the exhaust gas at the outlet of the spray tower 3 is monitored in real time by a dust detector 7 on the first pipe 6. If the dust concentration exceeds the standard, the primary circulation pipe 8 opens, and the valve located between the primary circulation pipe 8 and the desulfurization tower 4 on the first pipe 6 closes. The substandard flue gas is then directionally returned to the physical dust suppression tower 1 for reprocessing through the primary circulation pipe 8, preventing exhaust gas with high dust concentration from entering the desulfurization tower 4, thus improving desulfurization efficiency and preventing dust from adhering to the surface of the subsequent adsorbent, which would reduce the adsorption capacity of the activated carbon.This extends the service life of the three-stage carbon reduction cycle unit. When the dust concentration is only slightly above the standard, the primary circulation pipe 8 can be opened, and the flow rate of the exhaust gas entering the desulfurization tower 4 can be reduced. This allows some of the exhaust gas to enter the secondary dehydration cycle unit, while the rest returns to the primary dust reduction cycle unit for reprocessing. This ensures continuous treatment of the exhaust gas and gradually reduces the dust concentration, bringing the solid particles in the exhaust gas to the specified standard. The exhaust gas that has undergone dust reduction treatment enters the desulfurization tower 4 for desulfurization treatment. Because the spray tower 3 mixes a large amount of water vapor into the exhaust gas, and the desulfurization reaction in the desulfurization tower 4 also produces a large amount of water vapor, to avoid water vapor affecting the three-stage carbon reduction cycle unit, the desulfurized exhaust gas enters the dehumidifier 5. The dehumidifier 5 dehydrates the exhaust gas, which can quickly and effectively remove water vapor. The exhaust gas contains a large amount of water vapor. Dehumidifier 5 uses a rotary dehumidifier, which is existing technology. The exhaust gas, after being treated by the secondary dehydration circulation unit, enters the tertiary carbon reduction circulation unit through the second pipe 12. Before entering the tertiary carbon reduction circulation unit, the exhaust gas humidity is monitored in real time by a humidity detector 14 on the second pipe 12. If the humidity exceeds the standard, it is returned to dehumidifier 5 for secondary dehydration through the secondary circulation pipe 13. This effectively prevents high humidity from causing catalyst deactivation in the catalytic conversion carbon reduction tower, improving catalyst lifespan and reducing replacement frequency. Similarly, when the exhaust gas humidity is only slightly above the standard, the flow rate in the second pipe 12 is reduced, causing part of the exhaust gas to enter the tertiary carbon reduction circulation unit and the other part to enter dehumidifier 5 for re-dehydration. If the exhaust gas humidity is excessively high... The second pipe 12 is closed, allowing the exhaust gas to return to the dehumidifier 5 only through the second pipe 12 and the secondary circulation pipe 13. If the humidity does not decrease significantly under this condition, it indicates a malfunction in the dehumidifier 5, requiring maintenance. The exhaust gas treated by the secondary dehydration circulation unit enters the tertiary carbon reduction circulation unit. The exhaust gas first passes through the activated carbon adsorption tower 9 to physically adsorb and remove residual impurities, providing a clean reaction environment for subsequent catalytic carbon reduction. Specifically, it adsorbs small molecule carbon-containing organic matter: for volatile organic compounds (such as hydrocarbons) in the exhaust gas that have not been treated by the previous units, the activated carbon's porous structure physically traps them; it removes residual sulfides / dust: further adsorbing trace amounts of SO2 and dust that were not completely removed in the secondary dehydration circulation unit, preventing these impurities from adhering to the catalytic conversion. The catalyst surface of the carbon reduction tower 10 is poisoned, causing the catalyst to fail. The exhaust gas, after carbon reduction pretreatment, enters the catalytic conversion carbon reduction tower 10. Under the action of the catalyst, harmful carbon-containing substances in the exhaust gas are chemically converted into harmless substances. After catalytic conversion, the main carbon pollutants (CO, hydrocarbons) in the exhaust gas are converted into substances that meet emission standards, and finally discharged through the exhaust chimney 11. Before emission, the carbon component concentration of the exhaust gas is monitored in real time by the flue gas analyzer 16. If it does not meet the standards, it is returned to the activated carbon adsorption tower 9 for secondary carbon reduction through the three-stage circulation pipe 15, avoiding direct emission or return to the front end of the system. This ensures that the emitted flue gas always meets emission requirements, and compared to "full-process return," it reduces energy consumption, balancing environmental compliance and energy saving.When emissions fail to meet standards, the valve on the exhaust chimney 11 closes, preventing waste gas emissions. The waste gas is then circulated through the three-stage circulation pipe 15 to reduce carbon emissions. Once emissions meet standards, the waste gas is finally emitted. In summary, through "directional circulation control + structural innovation and optimization," the problems of "poor multi-stage coordination, high operation and maintenance costs, and low compliance rate" in existing waste gas treatment systems are specifically addressed. In practical implementation, the dust detector 7 uses a German DURAG DR 820F, with its sampling probe installed on the side wall of the first pipe 6 and extending into it. The humidity detector 14 uses a Vaisala HMP110, employing a capacitive sensor with an anti-condensation design and an insertion-type installation, with the probe pointing in the direction of airflow. The flue gas analyzer 16 uses an LB-62 series integrated flue gas analyzer, simultaneously detecting CO, hydrocarbons, and SO2 residues. The sampling system uses heated pipelines to prevent hydrocarbon condensation, and the sampling point is located between the outlet of the catalytic conversion carbon reduction tower 10 and the three-stage circulation pipe 15.

[0035] Example 2

[0036] Since most of the waste gas is industrial flue gas, which has a high temperature, the high-temperature flue gas directly enters the physical filter tower 2, causing the screen to soften under long-term high temperature, thus affecting the service life of the filter element in the physical filter tower 2. Therefore, based on Example 1, as follows... Figure 1 and Figure 13 As shown, the primary dust suppression circulation unit also includes an indirect cooling box 54. A U-shaped circulating cooling pipe 55 is installed inside the indirect cooling box 54 and is immersed in cold water. One end of the U-shaped circulating cooling pipe 55 is connected to the flue gas emission pipe, and the other end is connected to the air inlet pipe of the physical dust suppression tower 1. A water inlet pipe and a water outlet pipe are connected to the side wall of the indirect cooling box 54. The water inlet pipe first adds cold water to the indirect cooling box 54, submerging the U-shaped circulating cooling pipe 55. Then, the water outlet pipe is opened, creating a circulation between the water inlet and outlet. High-temperature flue gas is discharged into the U-shaped circulating cooling pipe 55 and undergoes heat exchange through indirect contact with the cold water, thereby reducing the temperature of the high-temperature flue gas. This indirect contact method prevents the exhaust gas from becoming high-humidity exhaust gas, avoiding the stickiness of solid particles under water vapor, which could cause the physical filter tower 2 to easily adhere to solid particles and cause blockage. This further reduces the frequency of blockage in the physical filter tower 2 and greatly extends its maintenance cycle.

[0037] Example 3

[0038] Based on Example 2, such as Figures 1 to 7As shown, a sloped dust suppression assembly is installed inside the physical dust suppression tower 1. The air inlet pipe of the physical dust suppression tower 1 is located below the sloped dust suppression assembly. The sloped dust suppression assembly includes several inclined dust suppression slopes 17, which are arranged sequentially along the length of the physical dust suppression tower 1. Several corrugated dust blocking plates 18 are fixed to the left and right end faces of each of the inclined dust suppression slopes 17. The corrugated dust blocking plates 18 are spaced apart along the width of the physical dust suppression tower 1. The corrugated dust blocking plates 18 are continuously bent into a corrugated shape along the height of the physical dust suppression tower 1. The corrugated dust blocking plates 18 of two adjacent inclined dust suppression slopes 17 contact to form a corrugated dust blocking pipe. Multiple corrugated dust blocking pipes are formed between two adjacent inclined dust suppression slopes 17, and the inclined dust suppression slopes 17 are arranged at an incline. As the exhaust gas flows from bottom to top, the inclined dust-collecting plate 17 is tilted, causing the flue gas to frequently collide with the inner wall of the corrugated dust-blocking pipe during its flow. Since the flow velocity between the gas and solid particles in the exhaust gas is different (i.e., the flow velocity of the solid particles is less than that of the gas), the velocity difference between the gas and solid particles gradually increases during the collision process, causing the solid particles, especially large-diameter solid particles, to gradually settle down. Because the corrugated dust-blocking pipe is corrugated, it can extend the flow path of the exhaust gas, allowing the dust to be captured by inertial collision and gravity settling, and finally fall to the bottom of the physical dust-collecting tower 1. This can effectively relieve the working pressure of the physical filter tower 2, and the dust collection process of dust collection-filtration-spraying can quickly and effectively remove dust from the exhaust gas.

[0039] Example 4

[0040] Because of its wavy shape, the corrugated dust-blocking duct is prone to dust accumulation at its bends. Furthermore, the dust in these areas is obstructed by the bends and does not easily slide downwards. Over time, this significantly reduces the conductivity of the inclined plate dust-collecting assembly, and may even lead to blockages. Therefore, based on Embodiment 3, as... Figures 1 to 8As shown, the dust-falling inclined plate 17 has a dust discharge chamber 19. A wavy path is formed between two adjacent corrugated dust-blocking plates 18 on the dust-falling inclined plate 17. Dust discharge holes 20 are opened at the bends and changes of direction on the wavy path, and these holes 20 connect to the dust discharge chamber 19. A main dust discharge pipe 21 is connected to the side wall of the physical dust-falling tower 1. A dust discharge hose 22 is connected to the bottom of the dust-falling inclined plate 17, and the hose 22 connects to the main dust discharge pipe 21. A gas chamber 24 and a dust storage chamber 25 are arranged sequentially from top to bottom inside the circulation tower 23. The gas chamber 24 is connected to the dust storage chamber 25 through a dust discharge pipe 26. A solenoid valve is installed on the dust discharge pipe 26. The main dust discharge pipe 21 connects to the gas chamber 24 and is equipped with an air pump. The gas chamber 24 is connected to the air inlet pipe of the physical dust-falling tower 1 through a circulation pipe 27. Dust discharge is performed on the corrugated dust-blocking pipe at regular intervals to ensure the smooth operation of the wavy dust-blocking pipe. It can maintain high conductivity continuously. Specifically, the solenoid valve on the dust discharge pipe 26 is opened and the air pump is turned on. The air pump generates suction, which acts on the corrugated dust-blocking pipe through the dust discharge chamber 19 and the dust discharge hole 20. This discharges solid particles, dust and other impurities inside the corrugated dust-blocking pipe into the gas chamber 24 of the circulation tower 23. Since the exhaust gas also enters the circulation tower 23 during the dust discharge process, in order to prevent the exhaust gas from being discharged into the air, the exhaust gas in the gas chamber 24 is discharged into the physical dust settling tower 1 through the circulation pipe 27. The impurities settled in the gas chamber 24 are discharged into the dust storage chamber 25 through the dust discharge pipe 26. The dust storage chamber 25 can be cleaned by workers regularly. This allows for online discharge of the corrugated dust-blocking pipe without affecting the normal treatment of exhaust gas, greatly improving the efficiency of exhaust gas treatment and reducing the risk of blockage of the corrugated dust-blocking pipe.

[0041] Example 5

[0042] In the initial stage, the high-temperature flue gas is relatively dry, and its solid impurities do not easily adhere to the corrugated dust-blocking pipe. When the humidity of the purified exhaust gas is high, the impurities accumulated in the corrugated dust-blocking pipe are not easily discharged into the circulation tower 23, which will cause blockage of the corrugated dust-blocking pipe after long-term operation. Secondly, even if only high-temperature flue gas is purified, long-term operation will still cause blockage of the corrugated dust-blocking pipe. Therefore, unblocking the corrugated dust-blocking pipe is essential. Therefore, based on Example 4, as follows... Figures 1 to 8As shown, sliding columns 28 are fixed on both sides of the dust-suppressing inclined plate 17. A rectangular inclined groove 29 is provided at the position where the sliding columns 28 are set. The sliding columns 28 are slidably set in the rectangular inclined groove 29. Sealing slide plates 30 are fixed on the upper and lower ends of the sliding columns 28. The side wall of the sealing slide plate 30 contacts the side wall of the rectangular inclined groove 29. The end of the sealing slide plate 30 away from the sliding columns 28 slides through the physical dust-suppressing tower 1. A cleaning component is provided above the inclined plate dust-suppressing component. The cleaning component includes two horizontally arranged high-pressure air pipes 31. The dust-suppressing inclined plate 17 is located between the two high-pressure air pipes 31. Several high-pressure air jet holes 32 are opened along the axial direction of the side wall of the high-pressure air pipes 31 near the dust-suppressing inclined plate 17. The corrugated dust-blocking duct is designed as a split structure to facilitate unblocking. The duct is formed by the contact of corrugated dust-blocking plates 18 on adjacent dust-collecting inclined plates 17. When the duct is blocked, the corrugated dust-blocking plates 18 on several dust-collecting inclined plates 17 are cleared sequentially from left to right or right to left. Specifically, the dust-collecting inclined plates 17 are moved parallel to the inclined direction, causing them to be offset from adjacent inclined plates 17 along the height of the physical dust collection tower 1, ensuring that both ends of the inclined plates 17 are unobstructed. Moving upwards, the cleaning component activates during this process, causing the high-pressure air nozzles 32 of the high-pressure air pipe 31 to eject high-pressure gas. This high-pressure gas impacts the area between two adjacent corrugated dust-blocking plates 18, quickly and effectively removing the clumps of solid matter adhering to the dust-sinking ramps 17. Once the dust-sinking ramp 17 is above the cleaning component, the top-to-bottom cleaning operation for that ramp 17 is complete. The ramp 17 then resets, and the next ramp 17 moves to perform the cleaning, thus completing the cleaning operation for all the dust-sinking ramps 17 one by one. It is important to note that this unblocking operation requires stopping exhaust gas treatment; exhaust gas treatment should only resume after the unblocking is complete. In practice, the high-pressure air pipe 31 is connected to an air compressor or high-pressure gas cylinder via an intake pipe, enabling the high-pressure air pipe 31 to eject high-pressure gas to clean the dust-sinking ramps 17.

[0043] Example 6

[0044] Based on Example 5, such as Figures 1 to 7As shown, the outer wall of the physical dust suppression tower 1 is equipped with a dust suppression driving mechanism, which includes a driving inclined plate 33, a sliding seat 34, and a docking cone rod 35. The driving inclined plate 33 is slidably mounted on the physical dust suppression tower 1, perpendicular to the rectangular inclined groove 29, and its movement path is parallel to the rectangular inclined groove 29. The sliding seat 34 is mounted on the driving inclined plate 33, and its movement path is perpendicular to the rectangular inclined groove 29. The end of the sliding seat 34 near the sliding column 28 is provided with a docking cone rod 35, and the end of the sliding column 28 near the sliding seat 34 is provided with a docking hole 36. The docking cone rod 35 connects to the sliding column 28. The mating hole 36 connects the sliding seat 34 to the sliding column 28. The side wall of the physical dust reduction tower 1 is provided with a first linear drive module 56 at both ends of the drive inclined plate 33. The two ends of the drive inclined plate 33 are respectively installed on the slides of the two first linear drive modules 56. A second linear drive module 57 is installed on the drive inclined plate 33. The sliding seat 34 is installed on the slide of the second linear drive module 57. A docking cylinder 58 is installed on the sliding seat 34. The telescopic shaft of the docking cylinder 58 is connected to the docking cone rod 35. The first linear drive module 56 and the second linear drive module 57 adopt a screw and nut pair or a rodless cylinder. Initially, the sliding column 28 is located at the bottom of the rectangular inclined trough 29. The dust-suppressing inclined plate 17 is kept stable by the gravity of the dust-suppressing inclined plate 17 and the cooperation between the sliding column 28 and the rectangular inclined trough 29. When the unblocking operation is performed, the second linear drive module 57 drives the sliding seat 34 to move, so that the docking cone rod 35 corresponds to the docking hole 36 on the sliding column 28. Then, the docking cylinder 58 drives the docking cone rod 35 to insert into the docking hole 36. Then, the first linear drive module 56 drives the drive inclined plate 33 to move obliquely upward, thereby driving the... The sliding column 28 moves within the rectangular inclined groove 29, causing the dust-falling inclined plate 17 to move obliquely upwards. During the movement, the cleaning component completes the cleaning action. After cleaning, the dust-falling inclined plate 17 is reset, and the docking cylinder 58 drives the docking cone rod 35 to disengage from the docking hole 36. Then, the sliding seat 34 moves to the position of the next dust-falling inclined plate 17, causing the docking cone rod 35 to insert into the docking hole 36 of the next sliding column 28 to clean the next dust-falling inclined plate 17. The above actions are repeated to complete the cleaning operation of all dust-falling inclined plates 17 one by one.

[0045] Example 7

[0046] Although the physical dust collection tower 1 significantly reduces the workload of the physical filter tower 2 and greatly extends the clogging cycle, clogging can still occur after prolonged operation. Therefore, unclogging the physical filter tower 2 is necessary. To this end, based on Example 6, as follows... Figures 1 to 12As shown, the physical filter tower 2 has an upper chamber 37 and a lower chamber 38 centered inside. The diameter of the lower chamber 38 is larger than the diameter of the upper chamber 37. A combined fine sieve mechanism is installed in the upper chamber 37. The combined fine sieve mechanism has the freedom to move along the height direction of the physical filter tower 2. The combined fine sieve mechanism includes an upper annular sieve plate 39 and a lower annular sieve plate 40. Several transverse sieve wires 41 are fixed at equal intervals at the bottom of the upper annular sieve plate 39, and several longitudinal sieve wires 42 are fixed at equal intervals at the top of the lower annular sieve plate 40. The longitudinal sieve wires 42 contact the transverse sieve wires 41 to form a mesh-like fine sieve. A pneumatic cleaning mechanism is installed in the lower chamber 38. The pneumatic cleaning mechanism includes a moving cleaning pipe 43 and a cleaning drive rod 44. The length of the moving cleaning pipe 43 is greater than that of the upper annular sieve plate. The physical filter tower 2 has an inner diameter of 39. A cylinder 45 is horizontally installed on the side wall. The telescopic shaft of the cylinder 45 is connected to one end of a cleaning drive rod 44 via a connecting rod. The other end of the cleaning drive rod 44 passes through the lower chamber 38 and connects to a movable cleaning pipe 43. The side wall of the movable cleaning pipe 43 has several lower air pressure holes 46 and several upper air pressure holes 47 along its own axial direction. The upper air pressure holes 47 are inclined upwards, and the lower air pressure holes 46 are inclined downwards. The inner cavity of the physical filter tower 2 is set in a stepped shape, i.e., an upper chamber 37 and a lower chamber 38. The size of the lower chamber 38 is larger than that of the upper chamber 37, used to unclog the combined fine screening mechanism. In the working state, the combined fine screening mechanism is located in the upper chamber 37, used to filter small-diameter impurities in the exhaust gas. When the combined fine screening mechanism... When blockages require clearing, the intake of exhaust gas is cut off, and the combined fine screening mechanism moves downward into the lower chamber 38. Since the combined fine screening mechanism is formed by the separate assembly of the upper annular screen 39 and the lower annular screen 40, the lower annular screen 40 continues to move downward, separating it from the upper annular screen 39 and creating a cleaning space between them for the moving cleaning pipe 43 to enter. Because the upper annular screen 39 and the lower annular screen 40 can be separated, the dust simultaneously wrapped around the transverse screen wires 41 and the longitudinal screen wires 42 is torn off, facilitating subsequent high-pressure cleaning operations. The cylinder 45 drives the moving cleaning pipe 43 into the cleaning space via the cleaning drive rod 44. The upper air pressure hole 47 on the moving cleaning pipe 43... High-pressure gas is ejected from both the upper and lower air pressure holes 46 and the lower air pressure hole 47. The high-pressure gas from the upper air pressure hole 47 acts on the transverse screen wires 41, while the high-pressure gas from the lower air pressure hole 46 acts on the longitudinal screen wires 42. This blows off the dust adhering to the transverse and longitudinal screen wires 41 and causes it to fall to the bottom of the lower chamber 38. Since the size of the lower chamber 38 is larger than that of the upper chamber 37, the size of the combined fine screening mechanism matches that of the upper chamber 37. When the combined fine screening mechanism enters the lower chamber 38, a large space is formed around it, allowing the length of the moving cleaning pipe 43 to be greater than the inner diameter of the lower annular screen plate 40. This enables it to fully cover the transverse and longitudinal screen wires 41 and 42 for cleaning, resulting in a better unblocking effect. In specific implementation...The mobile cleaning pipe 43 is connected to an air compressor or high-pressure gas cylinder via an intake hose. Secondly, two physical filter towers 2 are configured, one operating and the other on standby. When one physical filter tower 2 is being cleared, the other operates. Similarly, two physical dust suppression towers 1 can also be configured, thus enabling uninterrupted exhaust gas treatment.

[0047] Example 8

[0048] Based on Example 7, such as Figures 1 to 12 As shown, the top surface of the upper annular screen 39 is connected to two hollow tubes 48, which are symmetrically arranged about the center of the upper annular screen 39. The lower annular screen 40 is connected to two drive vertical rods 49. The two hollow tubes 48 extend from the top of the physical filtration tower 2 and are connected together through the lower drive plate 50. The two drive vertical rods 49 extend from the top of the two hollow tubes 48 and are connected together through the upper drive plate 51. The physical filtration tower 2 is vertically equipped with a first drive cylinder 52 and a second drive cylinder 53. The telescopic shaft of the first drive cylinder 52 is connected to the lower drive plate 50, and the telescopic shaft of the second drive cylinder 53 moves through the lower drive plate 50 and connects to the upper drive plate 51. Through the arrangement of the hollow tubes 48, the lower annular screen 40 is connected to the upper drive plate 51. The drive rod 49 passes through the hollow tube 48 and connects to the external second drive cylinder 53, allowing the upper annular screen 39 and the lower annular screen 40 to move independently. During operation, the first drive cylinder 52 drives the upper annular screen 39 into the upper chamber 37, and the second drive cylinder 53 drives the lower annular screen 40 into the upper chamber 37, causing the lower annular screen 40 to contact the upper annular screen 39, forming a combined fine sieve mechanism. When clearing blockages, both the upper annular screen 39 and the lower annular screen 40 move downwards into the lower chamber 38. Then, the upper annular screen 39 stops moving, and the second drive cylinder 53 continues to drive the lower annular screen downwards, creating a cleaning space between the upper annular screen 39 and the lower annular screen 40 for easy clearing operations. It should be noted that the length of the moving cleaning pipe 43 is less than the distance between the two drive rods 49, allowing the moving cleaning pipe 43 to enter the cleaning space between the two drive rods 49, thus avoiding interference.

[0049] Example 9

[0050] In practical applications, combined fine screening mechanisms, such as... Figures 1 to 11As shown, damage and replacement may occur. To facilitate the replacement of the combined fine screening mechanism, based on Embodiment 8, an upper mounting plate 59 is fixedly sleeved at the bottom of the hollow tube 48. The upper mounting plate is connected to the upper annular screen plate 39 by screws. The drive vertical rod 49 passes through the lower annular screen plate 40 and is threadedly fitted with a lower mounting plate 60. The lower mounting plate 60 is connected to the bottom of the lower annular screen plate 40 by screws. The physical filter tower 2 has operation windows on both sides of the lower chamber 38. The operation windows are sealed by sealing plates. After removing the seals, the upper annular screen plate 39 and the lower annular screen plate 40 can be replaced through the operation windows. First, remove the lower mounting plate 60 to remove the lower annular screen plate 40. Then, separate the upper mounting plate 59 from the upper annular screen plate 39 to remove the upper annular screen plate 39 downwards. During installation, first install the upper annular screen plate 39, then install the lower annular screen plate 40. Finally, thread the lower mounting plate 60 onto the drive vertical rod 49. Connecting the lower mounting plate 60 to the lower annular screen plate 40 completes the replacement operation of the combined fine screening mechanism.

Claims

1. A multi-stage circulating waste gas carbon reduction treatment system, characterized in that, The system includes a primary dust suppression circulation unit, a secondary dehydration circulation unit, and a tertiary carbon reduction circulation unit. The primary dust suppression circulation unit comprises a physical dust suppression tower, a physical filter tower, and a spray tower connected sequentially along the flue gas flow path. The secondary dehydration circulation unit comprises a desulfurization tower and a dehumidifier connected sequentially along the flue gas flow path. The outlet of the spray tower is connected to the inlet of the desulfurization tower via a first pipe. A dust detector is installed on the first pipe, which is connected to the inlet pipe of the physical dust suppression tower via a primary circulation pipe. The dust detector is positioned between the spray tower and the primary circulation pipe. The tertiary carbon reduction circulation unit includes... An activated carbon adsorption tower, a catalytic conversion carbon reduction tower, and an emission chimney are sequentially connected along the flue gas flow path. The outlet of the dehumidifier is connected to the inlet of the activated carbon adsorption tower via a second pipe. The second pipe is connected to the inlet of the dehumidifier via a secondary circulation pipe. A humidity detector is installed on the second pipe and is located between the secondary circulation pipe and the dehumidifier. The outlet of the catalytic conversion carbon reduction tower is connected to the inlet of the activated carbon adsorption tower via a tertiary circulation pipe. A flue gas analyzer is installed on the tertiary circulation pipe, and the sampling port of the flue gas analyzer is located between the catalytic conversion carbon reduction tower and the tertiary circulation pipe. The physical dust suppression tower is equipped with an inclined plate dust suppression assembly. The air inlet pipe of the physical dust suppression tower is located below the inclined plate dust suppression assembly. The inclined plate dust suppression assembly includes several inclined dust suppression plates. The inclined plates are arranged sequentially along the length of the physical dust suppression tower. Several corrugated dust blocking plates are fixed to the left and right end faces of the inclined plates. The corrugated dust blocking plates are spaced apart along the width of the physical dust suppression tower. The corrugated dust blocking plates are continuously bent into a corrugated shape along the height of the physical dust suppression tower. The corrugated dust blocking plates of two adjacent inclined plates contact each other to form a corrugated dust blocking pipe. The dust-falling inclined plate is provided with a dust discharge chamber. A wavy path is formed between two adjacent wavy dust-blocking plates on the dust-falling inclined plate. Dust discharge holes are opened at the bending and changing positions of the wavy path. The dust discharge holes are connected to the dust discharge chamber. The side wall of the physical dust-falling tower is connected to a main dust discharge pipe. The bottom of the dust-falling inclined plate is connected to a dust discharge hose. The dust discharge hose is connected to the main dust discharge pipe. The main dust discharge pipe is connected to the circulation tower. Both sides of the dust-suppressing inclined plate are fixed with sliding columns. The physical dust-suppressing tower has a rectangular inclined groove at the location where the sliding columns are set. The sliding columns are slidably set in the rectangular inclined groove. Sealing slide plates are fixed on the upper and lower ends of the sliding columns. The sidewall of the sealing slide plate contacts the sidewall of the rectangular inclined groove. The end of the sealing slide plate away from the sliding column slides through the physical dust-suppressing tower. A cleaning component is set above the inclined plate dust-suppressing assembly. The cleaning component includes two horizontally arranged high-pressure air pipes. The dust-suppressing inclined plate is located between the two high-pressure air pipes. The sidewall of the high-pressure air pipe near the dust-suppressing inclined plate has several high-pressure air jet holes along its own axis. The outer wall of the physical dust suppression tower is equipped with a dust suppression driving mechanism, which includes a driving inclined plate, a sliding seat, and a docking cone rod. The driving inclined plate is slidably installed on the physical dust suppression tower. The driving inclined plate is perpendicular to the rectangular inclined groove, and the moving path of the driving inclined plate is parallel to the rectangular inclined groove. A sliding seat is installed on the driving inclined plate, and the moving path of the sliding seat is perpendicular to the rectangular inclined groove. A docking cone rod is provided at one end of the sliding seat near the sliding column, and a docking hole is opened at one end of the sliding column near the sliding seat. The sliding seat is connected to the sliding column through the cooperation of the docking cone rod and the docking hole.

2. The multi-stage circulating waste gas carbon reduction treatment system according to claim 1, characterized in that, The circulating tower is provided with a gas chamber and a dust storage chamber from top to bottom. The gas chamber is connected to the dust storage chamber through a dust discharge pipe. A solenoid valve is installed on the dust discharge pipe. The main dust discharge pipeline is connected to the gas chamber. An air pump is installed on the main dust discharge pipeline. The gas chamber is connected to the air inlet pipe of the physical dust reduction tower through a circulating pipeline.

3. The multi-stage circulating waste gas carbon reduction treatment system according to claim 1, characterized in that, The physical filtration tower is centrally located with an upper chamber and a lower chamber. The diameter of the lower chamber is larger than that of the upper chamber. A combined fine sieve mechanism is installed in the upper chamber. The combined fine sieve mechanism has the freedom to move along the height of the physical filtration tower. The combined fine sieve mechanism includes an upper annular sieve disc and a lower annular sieve disc. Several transverse sieve wires are fixed at equal intervals at the bottom of the upper annular sieve disc, and several longitudinal sieve wires are fixed at equal intervals at the top of the lower annular sieve disc. The longitudinal sieve wires contact the transverse sieve wires to form a mesh-like fine sieve.

4. The multi-stage circulating waste gas carbon reduction treatment system according to claim 3, characterized in that, A pneumatic cleaning mechanism is provided in the lower chamber. The pneumatic cleaning mechanism includes a movable cleaning pipe and a cleaning drive rod. The length of the movable cleaning pipe is greater than the inner diameter of the upper annular screen. A cylinder is horizontally installed on the side wall of the physical filtration tower. The telescopic shaft of the cylinder is connected to one end of the cleaning drive rod through a connecting rod. The other end of the cleaning drive rod passes through the lower chamber and connects to the movable cleaning pipe. The side wall of the movable cleaning pipe has several lower air pressure holes and several upper air pressure holes along its own axial direction. The upper air pressure holes are inclined upwards, and the lower air pressure holes are inclined downwards.

5. The multi-stage circulating waste gas carbon reduction treatment system according to claim 4, characterized in that, The top surface of the upper annular screen is connected to two hollow tubes, which are symmetrically arranged about the center of the upper annular screen. The lower annular screen is connected to two drive rods. The two hollow tubes pass through the top of the physical filtration tower and are connected together through the lower drive plate. The two drive rods pass through the top of the two hollow tubes and are connected together through the upper drive plate. The physical filtration tower is vertically equipped with a first drive cylinder and a second drive cylinder. The telescopic shaft of the first drive cylinder is connected to the lower drive plate, and the telescopic shaft of the second drive cylinder moves through the lower drive plate and is connected to the upper drive plate.

6. The multi-stage circulating waste gas carbon reduction treatment system according to claim 1, characterized in that, The primary dust suppression circulation unit also includes an indirect cooling box, which is equipped with a U-shaped circulating cooling pipe. The U-shaped circulating cooling pipe is immersed in the cold water in the indirect cooling box. One end of the U-shaped circulating cooling pipe is connected to the flue gas emission pipe, and the other end is connected to the air inlet pipe of the physical dust suppression tower. The side wall of the indirect cooling box is connected to a water inlet pipe and a water outlet pipe.

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