An industrial furnace exhaust gas treatment control system and control method

Abstract

The present invention discloses an exhaust gas treatment control system and a control method for an industrial furnace. The control system includes an exhaust main pipe, on which a primary filtration and separation mechanism for separating particulate matter in the flue gas, a gas mixing device for mixing with the flue gas to absorb the waste heat of the flue gas, and a flue gas treatment device for finally treating the flue gas to meet the discharge standards are sequentially arranged along the exhaust direction. The gas mixing device includes a flue gas inlet pipe, an air inlet pipe, and a mixed gas outlet pipe, and a gas mixing mechanism for assisting the mixing of the flue gas and air is arranged in the mixing device. The present invention does not require heat exchange between the flue gas and the combustion-supporting gas, but directly mixes the treated flue gas with the combustion-supporting gas, thus eliminating the need to consider the heat transfer efficiency problem and achieving the full utilization of the heat of the flue gas, improving the utilization efficiency; and can adjust the gas mixing volume in a timely manner according to the flue gas parameters to ensure that the temperature of the mixed gas is maintained within a stable range, thereby avoiding affecting the working conditions of the industrial furnace, avoiding fluctuations, and affecting the processing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial furnace flue gas treatment, and particularly relates to an industrial furnace exhaust gas treatment control system and a control method. Background Art

[0002] An industrial furnace is a thermal equipment that uses the heat generated by fuel combustion or electric energy conversion to heat materials or workpieces. For the flue gas generated by fuel combustion, it is generally discharged after treatment. To recover the heat in the flue gas, the existing method is generally to use a heat exchanger to exchange heat between the flue gas and gas or water, so as to reduce energy consumption and avoid waste of resources. However, the method of using a heat exchanger for heat exchange is limited by the heat exchange efficiency on the one hand. In the case of continuous flow of the flue gas, it is impossible to fully absorb the heat in the flue gas, and the flue gas temperature will also change under different working conditions of the industrial furnace, so that the heat exchange amount cannot be accurately controlled. Therefore, when using the flue gas for heating auxiliary gas, etc., the input temperature will be uneven, thus affecting the heating working condition of the industrial furnace. Summary of the Invention

[0003] Technical Objective: Aiming at the deficiencies in the existing industrial furnace exhaust gas treatment, the present invention discloses an industrial furnace exhaust gas treatment control system and a control method that can effectively treat flue gas and improve the utilization rate of flue gas waste heat at the same time.

[0004] Technical Solution: To achieve the above technical objective, the present invention adopts the following technical solution:

[0005] An industrial furnace exhaust gas treatment control system includes an exhaust main pipe. Along the exhaust direction on the exhaust main pipe, a primary filtration and separation mechanism for separating particulate matter in the flue gas, a gas mixing device for mixing with the flue gas to absorb the waste heat of the flue gas, and a flue gas treatment device for finally treating the flue gas to meet the emission standards are sequentially arranged. The gas mixing device includes a flue gas inlet pipe, an air inlet pipe, and a mixed gas outlet pipe. A gas mixing mechanism for assisting the mixing of the flue gas and air is arranged in the gas mixing device; both the flue gas inlet pipe and the air inlet pipe are connected with a delivery pump for sending gas into the gas mixing device, and the mixing temperature of the air and the flue gas is controlled by the delivery flow rates of the two delivery pumps.

[0006] Preferably, the gas mixing mechanism of the present invention includes a flow guiding protrusion for guiding the incoming gas. Guide gas flow channels with endpoints converging at the upper part of the flow guiding protrusion are arranged on the flow guiding protrusion. The flue gas inlet pipe and the air inlet pipe are respectively arranged on the left and right sides of the flow guiding protrusion, corresponding to the guide gas flow channels on the flow guiding protrusion.

[0007] Preferably, a gas supplement pipeline for supplementing the oxygen content in the mixed gas according to the mixing amount of the flue gas and air is arranged on the mixed gas outlet pipe of the gas mixing device of the present invention.

[0008] Preferably, the primary filtration and separation mechanism of the present invention includes a filtration chamber communicated with the main exhaust pipe. A filtration pipe is arranged in the filtration chamber. The filtration pipes are arranged in the filtration chamber in an array perpendicular to the intake air flow direction. One end of the filtration pipe is connected to a mounting plate arranged in the filtration chamber, and the other end is cooperatively connected to a moving plate arranged in the filtration chamber. The moving plate is arranged opposite to the mounting plate. A limiting hole groove for cooperating with the end of the filtration pipe is arranged on the side of the moving plate close to the filtration pipe. The limiting hole groove adopts a tapered structure with a gradually decreasing diameter in the direction away from the filtration pipe.

[0009] Preferably, the end of the filtration pipe of the present invention is rotatably arranged in the mounting plate, and the rotation direction is towards the intake air direction. A reset spring for applying torque to the filtration pipe is arranged on the mounting plate. When the filtration pipe is driven by the intake air flow to rotate, the reset spring drives the filtration pipe to reset, so that the filtration pipe swings back and forth along the intake air direction.

[0010] Preferably, the flue gas treatment device of the present invention includes a spray dust removal box and a catalytic converter for catalytic oxidation treatment of harmful gases in the flue gas. The catalytic converter is communicated with the outlet of the spray dust removal box. The spray dust removal box includes a dust removal box body and a dust collection box body located below the dust removal box body. A rotating shaft is arranged in the dust removal box body. A spray ring and a dust collection plate are arranged along the axis direction of the rotating shaft. The dust collection plate is located below the spray ring. When spraying treatment is carried out on the flue gas entering the dust removal box body, the spray ring and the dust collection plate rotate synchronously with the rotating shaft. A water through groove communicated with the spray ring is arranged on the rotating shaft, and water supply to the spray ring is maintained through the water through groove when the rotating shaft rotates.

[0011] Preferably, a steam-water separator for separating the spray water in the flue gas is arranged between the passages of the dust removal box body of the present invention communicated with the catalytic converter.

[0012] The present invention discloses an industrial furnace exhaust gas treatment control method, which uses the above exhaust gas treatment control system. The waste gas of the industrial furnace is discharged through the main exhaust pipe. When passing through the primary filtration and separation mechanism, solid particles in the flue gas are separated by the primary filtration and separation mechanism. Part of the flue gas is transported to the gas mixing device by the action of a transport pump and mixed with air. The mixed gas is sent into the combustion-supporting gas pipeline of the industrial furnace and enters the industrial furnace again. The remaining flue gas enters the flue gas treatment device for spray dust removal and purification treatment and then is discharged.

[0013] Preferably, when gas mixing is carried out in the gas mixing device of the present invention, the temperature of the mixed flue gas is controlled according to the exhaust gas temperature, the air temperature, and the flow rates of the flue gas and air, so that the temperature of the mixed gas meets the requirements of the combustion-supporting gas.

[0014] Preferably, in the present invention, when separating particles through a primary filtering and separating mechanism, the particles are filtered out by the filter tube so that the particles remain in the filter cavity, and during filtering and separating, by adjusting the matching position of the upper limit hole groove on the movable plate and the end of the filter tube, the filter tube is vibrated within the radial range of the limiting hole groove when subjected to the force of the airflow, thereby reducing the adhesion of particles on the filter tube.

[0015] Beneficial effects: The industrial furnace exhaust gas treatment control system and control method provided by the present invention have the following beneficial effects:

[0016] 1. The present invention does not require heat exchange between the flue gas and the combustion-supporting gas, but directly mixes the treated flue gas with the combustion-supporting gas, thereby eliminating the need to consider the issue of heat transfer efficiency, achieving full utilization of the flue gas heat and improving utilization efficiency.

[0017] 2. The gas mixing mechanism of the present invention controls the input amount of flue gas and air through a delivery pump, so that the gas mixing amount can be adjusted in time according to the working condition requirements of the industrial furnace to ensure that the temperature of the mixed gas is maintained in a stable range, thereby avoiding affecting the working condition of the industrial furnace, avoiding causing fluctuations, and affecting the processing quality.

[0018] 3. The gas mixing mechanism of the present invention utilizes the guide protrusions to guide the flue gas and air so that the two can be fully mixed, thereby improving the mixing efficiency, avoiding the situation of uneven local temperature distribution, and ensuring the stability of the combustion condition of the industrial furnace.

[0019] 4. The present invention pre-treats the flue gas before mixing it with air to avoid affecting the combustion process of the industrial furnace, and filters the particulate matter in the flue gas through the filter tube; the end of the filter tube cooperates with the limiting hole groove on the movable plate, and when the intake disturbance causes the filter tube to move, it can vibrate back and forth within the radial range of the limiting hole groove in cooperation with the reset spring, thereby removing some particles attached to the surface of the filter tube and ensuring the filtering treatment effect.

[0020] 5. The present invention designs the movable plate to be movable forward and backward along the axial direction of the filter tube, so that the moving state of the end of the filter tube can be flexibly switched to achieve regular cleaning of attachments.

[0021] 6. The dust removal box of the present invention drives the spray ring and the dust collecting plate to rotate through the rotating shaft to spray and settle the fine dust in the flue gas, and the dust collecting plate can be used to send the falling dust into the dust collecting box to reduce the adhesion of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 This is a schematic diagram of the overall structure of the exhaust gas treatment control system of the present invention;

[0024] Figure 2 This is a structural diagram of the gas mixing device of the present invention;

[0025] Figure 3 This is a structural diagram of the primary filtration and separation mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the cooperation of the filter tube, mounting plate and moving plate of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the flue gas treatment device of the present invention;

[0028] Among them, 1 - exhaust main pipe, 2 - primary filtration and separation mechanism, 3 - gas mixing device, 4 - flue gas treatment device, 5 - flue gas inlet pipe, 6 - air inlet pipe, 7 - mixed gas outlet pipe, 8 - guide bulge, 9 - gas guide channel, 10 - gas supply pipeline, 11 - filtration chamber, 12 - filter tube, 13 - mounting plate, 14 - moving plate, 15 - limit hole groove, 16 - return spring, 17 - spray dust removal box, 18 - catalytic converter, 19 - dust removal box body, 20 - dust collection box body, 21 - rotating shaft, 22 - spray ring, 23 - dust collection plate, 24 - water through channel, 25 - steam-water separator. Detailed implementation manners

[0029] Now, reference will be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth below. Each embodiment and example is provided by way of explanation of the devices, components and materials of the present disclosure, and not by way of limitation. On the contrary, the following description provides a convenient illustration for implementing the exemplary embodiments of the present disclosure. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made within the teachings of the present disclosure without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be combined with another embodiment to yield yet another embodiment. It is intended that the present disclosure cover such modifications and variations as fall within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present disclosure are disclosed or are apparent from the following detailed description. It is to be understood by those of ordinary skill in the art that this description is only for the description of exemplary embodiments and is not intended to limit the broader aspects of the present disclosure.

[0030] As Figures 1-5As shown in the figure, the present invention discloses an exhaust gas treatment control system for an industrial furnace, which includes an exhaust main pipe 1. Along the exhaust gas direction on the exhaust main pipe 1, a primary filtration and separation mechanism 2 for separating particulate matter in the flue gas, a gas mixing device 3 for mixing with the flue gas to absorb the waste heat of the flue gas, and a flue gas treatment device 4 for finally treating the flue gas to meet the discharge standards are sequentially arranged. The gas mixing device 3 includes a flue gas inlet pipe 5, an air inlet pipe 6, and a mixed gas outlet pipe 7. A gas mixing mechanism for assisting the mixing of the flue gas and air is arranged in the gas mixing device 3; both the flue gas inlet pipe 5 and the air inlet pipe 6 are connected with a delivery pump for sending gas into the gas mixing device 3, and the mixing temperature of the air and the flue gas is controlled by the delivery flow rates of the two delivery pumps.

[0031] The flue gas of the present invention first passes through the primary filtration and separation mechanism 2 to separate the particulate matter in the flue gas, then enters the gas tank, and then the gas tank supplies gas to the gas mixing device 3. The remaining flue gas can enter the flue gas treatment device 4 through the flue gas treatment outlet provided on the gas tank for treatment and is discharged up to the standard after reaching the standard. Through the setting of the gas tank, the parameters of the flue gas can be detected in the gas tank and the flow rate of the flue gas extracted by the delivery pump during gas mixing can be reduced, so as to facilitate the control of the mixed flue gas volume. And preferably, before the waste gas participates in the up-to-standard treatment, waste heat recovery facilities such as a waste heat boiler can also be set up to further recover the heat energy in the residual flue gas to improve the overall heat energy utilization rate of the flue gas.

[0032] In a specific embodiment, as Figure 2 shown, the gas mixing mechanism of the present invention includes a diversion protrusion 8 for guiding the incoming gas. A gas guiding flow channel 9 with the end points converging on the upper part of the diversion protrusion 8 is arranged on the diversion protrusion 8. The flue gas inlet pipe 5 and the air inlet pipe 6 are respectively arranged on the left and right sides of the diversion protrusion 8 and correspond to the gas guiding flow channel 9 on the diversion protrusion 8. When the flue gas enters the gas mixing mechanism, it flows along the gas guiding flow channel 9, and the flue gas and the air are mixed through the arc-shaped structure at the top of the gas guiding flow channel 9, thereby improving the mixing uniformity; in addition, a gas supplement pipeline 10 for supplementing the oxygen content in the mixed gas according to the mixing amount of the flue gas and the air is arranged on the mixed gas outlet pipe 7 of the gas mixing device 3 of the present invention. The gas supplement pipeline can also be directly arranged on the gas mixing device. Directly using the gas supplement pipeline can make the oxygen content of the formed combustion-supporting gas meet the gas supply requirements of the industrial furnace, and the oxygen content can be adjusted according to needs to achieve full combustion of the fuel. Compared with the method of using air as the combustion-supporting gas, the present invention has good uniformity of the temperature distribution of the combustion-supporting gas, can realize the full utilization of the heat of the mixed flue gas, and the oxygen content is adjustable, so the use flexibility is better.

[0033] As Figure 3 and Figure 4As shown in the figure, the primary filtration and separation mechanism 2 of the present invention includes a filtration chamber 11 communicating with the main exhaust pipe 1. A filter pipe 12 is arranged in the filtration chamber 11. The filter pipes 12 are arranged in an array in the filtration chamber 11 perpendicular to the intake air flow direction. One end of the filter pipe 12 is connected to a mounting plate 13 arranged in the filtration chamber 11, and the other end is cooperatively connected to a moving plate 14 arranged in the filtration chamber 11. The moving plate 14 is arranged opposite to the mounting plate. A limiting hole groove 15 for cooperating with the end of the filter pipe 12 is arranged on the side of the moving plate 14 close to the filter pipe 12. The limiting hole groove 15 adopts a tapered structure with a gradually decreasing diameter in the direction away from the filter pipe 12.

[0034] The end of the filter pipe 12 is rotatably arranged in the mounting plate 13, and the rotation direction is towards the intake air direction. A return spring 16 for applying torque to the filter pipe 12 is arranged on the mounting plate 13. When the filter pipe 12 is driven by the intake air flow to rotate, the return spring 16 drives the filter pipe 12 to reset, so that the filter pipe 12 swings back and forth in the intake air direction.

[0035] The installation structure of the filter pipe 12 of the present invention can realize the transformation of the working state of the filter pipe 12 by adjusting the position of the moving plate 14. The moving plate 14 is driven to slide by a linear motor or a cylinder or other linearly movable power sources, so that the moving plate 14 approaches or moves away from the end of the filter pipe 12; when initially filtering, the moving plate 14 moves towards the side where the end of the filter pipe 12 is located. Since the limiting hole groove 15 is a tapered structure, as the moving plate 14 moves, the diameter of the position where the limiting hole groove 15 cooperates with the end of the filter pipe 12 gradually decreases, so as to achieve the purpose of fixing the end of the filter pipe 12 and keep the position of the filter pipe 12 stable during the flue gas filtration process. When it is necessary to remove the particulate matter attached to the filter pipe 12, the moving plate 14 is directly moved backward, so that the end of the filter pipe 12 can move within the radial range of the corresponding position of the limiting hole groove 15, so that under the action of the force generated by the air flow and the elastic force of the return spring 16, the filter pipe 12 vibrates reciprocally to achieve the purpose of removing the attached particulate matter and ensure the filtration treatment effect of the flue gas.

[0036] The remaining flue gas other than the mixed flue gas will be sent to a flue gas treatment device for treatment before final emission to remove the fine dust in the flue gas and treat the harmful gases. The flue gas treatment device 4 of the present invention includes a spray dust removal box 17 and a catalytic converter 18 for catalytic oxidation treatment of harmful gases in the flue gas. The catalytic converter 18 is communicated with the outlet of the spray dust removal box 17. The spray dust removal box 17 includes a dust removal box body 19 and a dust collection box body 20 located below the dust removal box body 19. A steam-water separator 25 for separating the spray water in the flue gas is arranged between the dust removal box body 19 and the passage communicated with the catalytic converter 18. A rotating shaft 21 is arranged in the dust removal box body 19. A spray ring 22 and a dust collection plate 23 are arranged along the axis direction of the rotating shaft 21. The dust collection plate 23 is located below the spray ring 22. The lower end of the rotating shaft 21 is connected with a motor. When spraying and treating the flue gas entering the dust removal box body 19, the spray ring 22 and the dust collection plate 23 rotate synchronously with the rotating shaft. A water through-flow groove 24 communicated with the spray ring 22 is arranged on the rotating shaft 21. The water through-flow groove 24 is connected with a water pipe for water supply through a fluid slip ring. The existing fluid slip ring is used to supply water during the rotation of the rotating shaft, and the spray ring 22 is supplied with water through the water through-flow groove 24 when the rotating shaft 21 rotates.

[0037] The dust contained in the flue gas will fall onto the dust collection plate 23 under the action of the spray water. Since the dust collection plate 23 will rotate synchronously with the rotating shaft 21, the centrifugal force generated by the rotation will cause the spray water mixed with the dust to be flung onto the side wall of the corresponding position of the dust removal box body, so that it can be collected into the dust collection box body 20 by arranging a flow channel on the side wall of the dust removal box body, completing the collection of the dust generated by spraying, and reducing the adhesion of dust on structures such as the rotating shaft and the dust collection plate.

[0038] The present invention also discloses an industrial furnace exhaust gas treatment control method. Using the above exhaust gas treatment control system, the waste gas of the industrial furnace is discharged through the exhaust main pipe. When passing through the primary filtration and separation mechanism, the solid particles in the flue gas are separated by the primary filtration and separation mechanism and then enter the gas box.

[0039] When separating particulate matter through the primary filtration and separation mechanism, the particulate matter is filtered out by the filter tube, and the particulate matter remains in the filter cavity. And during the filtration and separation, by adjusting the matching position of the limit hole groove on the moving plate and the end of the filter tube, the filter tube vibrates within the radial range of the limit hole groove under the action of the gas flow force, reducing the adhesion of particulate matter on the filter tube. Part of the flue gas in the gas box is transported to the gas mixing device by a transport pump to be mixed with air. The temperature of the mixed flue gas is controlled according to the exhaust gas temperature, the air temperature, and the flow rates of the flue gas and air, so that the temperature of the mixed gas meets the requirements of the combustion-supporting gas. The mixed gas is sent into the combustion-supporting gas pipeline of the industrial furnace and enters the industrial furnace again, and the remaining flue gas enters the flue gas treatment device for spray dust removal and purification treatment before being discharged.

Claims

1. An industrial furnace exhaust gas treatment control system, characterized in that: The invention comprises an exhaust pipe (1), on which a primary filtering and separating mechanism (2) for separating particulate matter in flue gas, a mixing device (3) for mixing with flue gas to absorb flue gas waste heat, and a flue gas treatment device (4) for finally treating the flue gas to meet emission standards are arranged in sequence along the exhaust direction. The flue gas first passes through the primary filtering and separating mechanism (2) to separate particulate matter in the flue gas, and then enters an air box, which then supplies air to the mixing device (3). The remaining flue gas enters the flue gas treatment device (4) through a flue gas treatment outlet arranged on the air box for treatment. The mixing device (3) comprises a flue gas inlet pipe (5), an air inlet pipe (6), and a mixed gas outlet pipe (7). A mixing mechanism for assisting the mixing of flue gas and air is arranged in the mixing device (3); the flue gas inlet pipe (5) and the air inlet pipe (6) are both connected to a delivery pump for delivering gas into the mixing device (3), and the mixed temperature of the air and flue gas is controlled by the delivery flow rates of the two delivery pumps. The gas mixing mechanism comprises a flow guiding protrusion (8) for guiding the incoming gas, the flow guiding protrusion (8) is provided with a flow guiding passage (9) whose end point converges at the upper part of the flow guiding protrusion (8), and the smoke inlet pipe (5) and the air inlet pipe (6) are respectively arranged on the left and right sides of the flow guiding protrusion (8), corresponding to the flow guiding passage (9) on the flow guiding protrusion (8); The primary filtering and separation mechanism (2) comprises a filtering chamber (11) connected to the exhaust main pipe (1), a filtering tube (12) being arranged in the filtering chamber (11), the filtering tubes (12) being arranged in an array in the filtering chamber (11) perpendicular to the direction of air flow, one end of the filtering tube (12) being connected to a mounting plate (13) arranged in the filtering chamber (11), and the other end of the filtering tube (12) being connected in cooperation with a movable plate (14) arranged in the filtering chamber (11), the movable plate (14) being arranged opposite to the mounting plate (13), a limiting hole groove (15) for cooperating with an end of the filtering tube (12) being arranged on a side of the movable plate (14) close to the filtering tube (12), the limiting hole groove (15) being a tapered structure with a diameter gradually decreasing in a direction away from the filtering tube (12); The end of the filter tube (12) is rotatably arranged in the mounting plate (13), with the rotation direction facing the air intake direction. A return spring (16) for applying torque to the filter tube (12) is arranged on the mounting plate (13); when the filter tube (12) is driven by the air intake flow to rotate, the return spring (16) drives the filter tube (12) to reset, so that the filter tube (12) swings back and forth in the air intake direction.

2. An industrial furnace exhaust gas treatment control system according to claim 1, characterized in that: The mixed gas outlet pipe (7) of the gas mixing device (3) is provided with an air supply pipeline (10) for supplementing the oxygen content in the mixed gas according to the mixed amount of flue gas and air.

3. An industrial furnace exhaust gas treatment control system according to claim 1, characterized in that: The flue gas treatment device (4) comprises a spray dust reduction box (17) and a catalyst (18) for catalytically oxidizing harmful gases in the flue gas, the catalyst (18) being connected to the outlet of the spray dust reduction box (17), the spray dust reduction box (17) comprising a dust removal box body (19) and a dust collection box body (20) located below the dust removal box body (19), a rotating shaft (21) being arranged in the dust removal box body (19), and a rotating shaft (21) being arranged along the axis of the rotating shaft (21) A spray ring (22) and a dust collecting plate (23) are arranged in a linear direction, and the dust collecting plate (23) is located below the spray ring (22). When the smoke entering the dust removal box (19) is sprayed, the spray ring (22) and the dust collecting plate (23) rotate synchronously with the rotating shaft. The rotating shaft (21) is provided with a water trough (24) connected to the spray ring (22), and water is supplied to the spray ring (22) through the water trough (24) when the rotating shaft (21) rotates.

4. An industrial furnace exhaust gas treatment control system according to claim 3, characterized in that: The dust removal box (19) is provided with a steam-water separator (25) between the passages communicating with the catalyst (18) for separating the spray water in the flue gas.

5. An industrial furnace exhaust gas treatment control method, using the exhaust gas treatment control system according to any one of claims 1 to 4, characterized in that: The exhaust gas from the industrial furnace is discharged through the exhaust main pipe. When passing through the first-level filtering and separation mechanism, the solid particles in the flue gas are separated by the first-level filtering and separation mechanism. Part of the flue gas is transported to the mixing device under the action of the conveying pump to mix with the air. The mixed gas is sent to the combustion-supporting gas pipeline of the industrial furnace and enters the industrial furnace again. The remaining flue gas enters the flue gas treatment device for spray dust removal and purification treatment before being discharged.

6. The industrial furnace exhaust gas treatment control method according to claim 5, characterized in that: When gases are mixed in the gas mixing device, the temperature of the mixed flue gas is controlled according to the exhaust temperature, air temperature and the flow rate of the flue gas and air, so that the temperature of the mixed gas meets the requirements of the combustion-supporting gas.

7. The industrial furnace exhaust gas treatment control method according to claim 5, characterized in that: When the particles are separated by the primary filtering and separation mechanism, the particles are filtered out by the filter tube so that the particles remain in the filter cavity. During the filtering and separation, the matching position of the upper limit hole groove on the movable plate and the end of the filter tube is adjusted so that the filter tube vibrates within the radial range of the limit hole groove when subjected to the force of the airflow, thereby reducing the adhesion of particles on the filter tube.

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