A device and method for removing oil smoke from factory-mixed hot regeneration tail gas

Abstract

The present invention relates to the technical field of asphalt hot regeneration equipment, and provides an oil fume removal device and method for factory-mixed hot regeneration tail gas, the oil fume removal device comprising a bag dust collector, a powder spraying device and an oil fume removal box; an exhaust gas outlet is formed in the middle of the oil fume removal box, the exhaust gas outlet is equipped with an adjustable damper, and the input end of the bag dust collector is connected with the exhaust gas outlet; a powder bin for storing mineral powder is formed at the lower part of the oil fume removal box; an exhaust gas inlet is provided at the top of the oil fume removal box, and a plurality of the powder spraying devices are provided around the exhaust gas inlet on the inner top wall of the oil fume removal box. The advantages of the present invention are: it can effectively remove asphalt oil fume in the hot regeneration tail gas before entering the bag dust collector, so that the asphalt oil fume in the hot regeneration tail gas will not enter the bag dust collector, and the bag dust collector will not reduce the air permeability due to being filled with asphalt oil fume, thereby effectively improving the service life of the bag dust collector.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt hot regeneration equipment, and in particular to a device and method for removing oil smoke from factory-mixed hot regeneration tail gas. Background Art

[0002] During the production process of asphalt mixture plant hot regeneration equipment, the hot regeneration exhaust gas generated is mainly composed of asphalt fume and dust particles. At present, most of the process flows for treating hot regeneration exhaust gas in the industry are to generate hot regeneration exhaust gas from the regeneration drum, collect it in the exhaust gas chamber through negative pressure, and finally reach the original bag dust collector through the fan; but this process flow is often used in downstream plant hot regeneration equipment, but not in countercurrent plant hot regeneration equipment, because if the countercurrent plant hot regeneration equipment uses this process flow, the following problems will arise: the countercurrent structure determines that the feeding end of the old asphalt cold material is the outlet end of the hot regeneration exhaust gas. When the hot regeneration exhaust gas is sucked away, a large amount of dust generated when the old asphalt material is fed will also be taken away. At this time, the content of dust and asphalt particles in the hot regeneration exhaust gas is much higher than that in the downstream hot regeneration exhaust gas, and the countercurrent structure determines that its hot regeneration exhaust gas temperature is lower than that of the downstream type. Therefore, when the hot regeneration exhaust gas passes through the fan blades, the fan blades will quickly be covered with sludge, and the fan will lose dynamic balance and be damaged.

[0003] In order to better treat the countercurrent hot regeneration exhaust gas, a new countercurrent plant-mixed hot regeneration equipment exhaust gas treatment method has emerged in the industry, that is, adding a bag dust collector between the induced draft fan and the exhaust chamber to filter the dust and oil fume particles in the hot regeneration exhaust gas. However, due to the presence of oil fume particles, the bag dust collector will quickly become filled with paste, thereby reducing the air permeability of the bag dust collector, which greatly shortens the service life of the bag dust collector. Therefore, in order to improve the service life of the bag-type dust collector, it is very necessary to purify the asphalt fume in the hot regeneration exhaust gas. At present, the most economical and simple method for treating asphalt fume in the hot regeneration exhaust gas is to mix the hot regeneration exhaust gas with mineral powder, so that the mineral powder wraps the asphalt fume to form particle sedimentation, such as a purification control method for factory-mixed hot regeneration exhaust gas disclosed in Chinese invention patent application number CN202311471519.3; however, this method sprays the mineral powder into the intake pipe through a powder spraying pipe to mix with the hot regeneration exhaust gas, and the hot regeneration exhaust gas in the intake pipe has a very fast flow rate. After the mineral powder is sprayed into the intake pipe, it is not in the form of a spray but in the form of a line, and under the action of the high flow rate of the hot regeneration exhaust gas, it will quickly reach the position of the bag-type dust collector, which makes the mineral powder unable to fully merge with the hot regeneration exhaust gas, and the effect of powder wrapping the asphalt fume is very unsatisfactory, and the service life of the bag-type dust collector cannot be effectively improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a device and method for removing oil fume from factory-mixed hot regeneration exhaust gas, so as to solve the problem that the prior art adopts the method of spraying mineral powder into the intake pipe through a powder spraying pipe to mix with the hot regeneration exhaust gas, and the hot regeneration exhaust gas has a very fast flow rate in the intake pipe. After the mineral powder is sprayed into the intake pipe, it is not in the form of a spray but in the form of a line, and under the action of the high flow rate of the hot regeneration exhaust gas, it will quickly reach the position of the bag dust collector, resulting in the mineral powder being unable to fully merge with the hot regeneration exhaust gas, the effect of powder coating the asphalt oil fume is very unsatisfactory, and the service life of the bag dust collector cannot be effectively improved.

[0005] The present invention is achieved in that:

[0006] In a first aspect, a fume removal device for factory-mixed hot regeneration tail gas includes a bag filter, a powder spraying device, and an oil fume removal box;

[0007] An exhaust gas outlet is formed in the middle of the oil fume removal box, and an adjustable damper is provided at the exhaust gas outlet. The input end of the bag filter is connected to the exhaust gas outlet.

[0008] A powder bin for storing mineral powder is formed at the lower part of the oil fume removal box; an exhaust gas inlet is arranged at the top of the oil fume removal box, and a plurality of powder spraying devices are arranged on the inner top wall of the oil fume removal box around the exhaust gas inlet.

[0009] Furthermore, the upper and middle part of the fume removal box is divided into a first chamber and a second chamber by a diversion partition, and the lower end of the diversion partition extends downward to a position close to the powder bin; the powder spraying device and the exhaust gas inlet are arranged at the top of the second chamber, and the exhaust gas outlet and the adjustable damper are arranged on the side wall of the first chamber.

[0010] Furthermore, the powder bin has an inverted cone-shaped structure.

[0011] Furthermore, a slope is formed at the lower part of the second chamber on a side away from the diversion baffle for gradually narrowing the second chamber from top to bottom.

[0012] Furthermore, it also includes a first material level meter arranged at the upper part of the powder bin and a second material level meter arranged at the lower part of the powder bin.

[0013] Furthermore, the adjustable damper is an electrically adjustable shutter damper.

[0014] Furthermore, an automatic discharge valve is provided at the bottom of the powder bin.

[0015] In a second aspect, a method for removing oil fume from factory-mixed hot regeneration tail gas is provided, wherein the method uses the above-mentioned oil fume removal device for factory-mixed hot regeneration tail gas; the method comprises the following steps:

[0016] The hot regeneration exhaust gas generated by the regeneration drum is introduced into the oil fume removal box through the exhaust gas inlet, and at the same time, each powder spraying device is controlled to continuously spray mineral powder toward the hot regeneration exhaust gas, so that the mineral powder and the asphalt oil fume in the hot regeneration exhaust gas are fused and coated to form particles and precipitate in the powder bin;

[0017] The hot regeneration exhaust gas after the first fusion continues to rush downward to the powder bin at the bottom of the fume removal box. The mineral powder in the powder bin will be lifted up under the impact of the airflow of the hot regeneration exhaust gas, and form a local cyclone reflux with the hot regeneration exhaust gas at the upper part of the powder bin, so that the mineral powder and the asphalt fume in the hot regeneration exhaust gas are fully fused and coated for the second time to form particles and settle in the powder bin;

[0018] The hot regeneration exhaust gas after the asphalt fume is removed is introduced into the bag filter through the exhaust gas outlet for dust removal and filtration.

[0019] Furthermore, the method comprises:

[0020] When it is detected that the mineral powder storage volume in the powder bin reaches the preset high material level, the bottom of the powder bin is controlled to open to discharge the powder, and at the same time, the adjustable air door is controlled to increase the opening and closing angle to increase the passing rate of the mineral powder;

[0021] When it is detected that the mineral powder storage amount in the powder bin reaches the preset low material level, the bottom of the powder bin is controlled to close to discharge the powder, and at the same time the adjustable air door is controlled to reduce the opening and closing angle to reduce the passing rate of the mineral powder.

[0022] The present invention adopts an oil fume removal box body arranged between the bag dust collector and the regeneration drum, and the middle part of the oil fume removal box body is connected with the bag dust collector, a powder bin for storing mineral powder is formed at the bottom of the oil fume removal box body, and a plurality of powder spraying devices are arranged around the exhaust gas inlet on the top of the oil fume removal box body; when the hot regenerated exhaust gas generated by the regeneration drum is introduced into the oil fume removal box body through the exhaust gas inlet during specific operation, each powder spraying device can be used to continuously spray powder toward the hot regenerated exhaust gas, so that the mineral powder and the asphalt oil fume in the hot regenerated exhaust gas are once fused and coated with powder to form particles and precipitate into the powder bin, and the hot regenerated exhaust gas after the once fusion will continue to rush downward Toward the powder bin at the lower part of the fume removal box, the mineral powder stored in the powder bin will be lifted upward under the impact of the airflow of the hot regeneration exhaust gas, and form a local cyclone reflux with the hot regeneration exhaust gas at the upper part of the powder bin, so that the mineral powder can be fully fused and coated with the asphalt fume in the hot regeneration exhaust gas for a second time and form particles to settle in the powder bin; therefore, the technical solution of the present invention can effectively remove the asphalt fume in the hot regeneration exhaust gas before entering the bag collector, so that the asphalt fume in the hot regeneration exhaust gas will not enter the bag collector, and the bag collector will not reduce the air permeability due to being filled with asphalt fume, thereby effectively improving the service life of the bag collector and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0024] Figure 1 This is a structural diagram of a device for removing oil smoke from factory-mixed hot regeneration tail gas according to the present invention;

[0025] Figure 2 It is a structural diagram of a device for removing oil smoke from factory-mixed hot regeneration tail gas of the present invention when the mineral powder and the hot regeneration tail gas form a local cyclone reflux at the upper part of the powder bin;

[0026] Figure 3 This is a structural diagram of the powder bin in the present invention when it is at a high material level;

[0027] Figure 4 It is a structural diagram of the powder bin when the powder bin is at a low material level in the present invention.

[0028] Description of reference numerals:

[0029] Oil fume removal device 100;

[0030] Bag dust collector 1;

[0031] Powder spraying device 2;

[0032] Fume removal box 3, exhaust gas outlet 31, powder bin 32, exhaust gas inlet 33, first chamber 34, second chamber 35, inclined surface 351;

[0033] Adjustable air door 4;

[0034] Diverter baffle 5;

[0035] A first material level meter 61, a second material level meter 62;

[0036] Automatic discharge valve 7. DETAILED DESCRIPTION

[0037] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. In addition, the terms "first", "second", etc., etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. Embodiment 1

[0039] See also Figures 1 to 4 As shown, the present invention is a device 100 for removing oil smoke from factory-mixed hot regeneration tail gas, and the oil smoke removal device 100 comprises a bag filter 1, a powder spraying device 2 and an oil smoke removal box 3;

[0040] An exhaust gas outlet 31 is formed in the middle of the oil fume removal box 3, and the exhaust gas outlet 31 is equipped with an adjustable damper 4. The input end of the bag filter 1 is connected to the exhaust gas outlet 31, so that the hot regenerated exhaust gas can enter the bag filter 1 through the exhaust gas outlet 31 for dust removal and filtration;

[0041] A powder bin 32 for storing mineral powder is formed at the lower part of the oil fume removal box 3; an exhaust gas inlet 33 is provided at the top of the oil fume removal box 3, so that the hot regeneration exhaust gas generated by the regeneration drum can be introduced into the oil fume removal box 3 by using the exhaust gas inlet 33, and a plurality of the powder spraying devices 2 are provided around the exhaust gas inlet 33 on the inner top wall of the oil fume removal box 3, so that the powder spraying devices 2 can be used to spray powder toward the hot regeneration exhaust gas. In the specific implementation of the present invention, a plurality of powder spraying devices 2 can be evenly distributed around the exhaust gas inlet 33, and each powder spraying device 2 can be controlled to spray powder evenly and uninterruptedly on the input hot regeneration exhaust gas.

[0042] Because the existing technology is to spray the mineral powder into the intake pipe through a powder spray pipe to mix it with the hot regeneration exhaust gas, and the hot regeneration exhaust gas in the intake pipe has a very fast flow rate during actual operation. After the mineral powder is sprayed into the intake pipe, it will not appear in a spray shape but in a line shape, and the flow rate of the hot regeneration exhaust gas is very fast, so that the mineral powder will quickly reach the bag dust collector together with the hot regeneration exhaust gas. The contact time between the mineral powder and the hot regeneration exhaust gas is very short, resulting in the mineral powder being unable to fully integrate with the asphalt fume in the hot regeneration exhaust gas. The effect of powder coating the asphalt fume is very unsatisfactory, and the service life of the bag dust collector cannot be effectively improved. The cost of replacing a set of bag dust collectors each time is as high as more than one million, and the cost is very high. Therefore, how to effectively improve the service life of bag dust collectors has always been an important technical problem that has plagued industry technicians. In view of the above technical difficulties, the present invention changes the traditional powder spraying method, and adopts an oil fume removal box body 3 to be set between the bag dust collector 1 and the regeneration drum, and the middle part of the oil fume removal box body 3 is connected to the bag dust collector 1, and a powder bin 32 for storing mineral powder is formed at the bottom of the oil fume removal box body 3, and a plurality of powder spraying devices 2 are arranged around the exhaust gas inlet 33 at the top of the oil fume removal box body 3; so that in specific operation, when the hot regeneration exhaust gas generated by the regeneration drum is introduced into the oil fume removal box body 3 through the exhaust gas inlet 33, each powder spraying device 2 can be used to continuously spray powder toward the hot regeneration exhaust gas, so that the mineral powder and the asphalt oil fume in the hot regeneration exhaust gas are fused and coated with powder to form particles and precipitated in the powder bin 32, and the fusion is carried out at one time The hot regeneration exhaust gas will continue to rush downward to the powder bin 32 at the bottom of the fume removal box 3, and the mineral powder stored in the powder bin 32 will be lifted up under the impact of the airflow of the hot regeneration exhaust gas, and form a local cyclone reflux with the hot regeneration exhaust gas at the upper part of the powder bin 32, so that the mineral powder can be fully fused and coated with the asphalt fume in the hot regeneration exhaust gas for a second time and form particles to settle in the powder bin; therefore, the technical solution of the present invention can effectively remove the asphalt fume in the hot regeneration exhaust gas before entering the bag-type dust collector 1, so that the asphalt fume in the hot regeneration exhaust gas will not enter the bag-type dust collector 1, and the air permeability of the bag-type dust collector 1 will not be reduced due to being filled with asphalt fume, thereby effectively improving the service life of the bag-type dust collector 1 and reducing the production cost.

[0043] In some embodiments of the present invention, the upper and middle part of the fume removal box 3 is divided into a first chamber 34 and a second chamber 35 by a diverter partition 5, and the lower end of the diverter partition 5 extends downward to a position close to the powder bin 32; the powder spraying device 2 and the exhaust gas inlet 33 are arranged at the top of the second chamber 35, and the exhaust gas outlet 31 and the adjustable damper 4 are arranged on the side wall of the first chamber 34.

[0044] The present invention divides the middle and upper part of the fume removal box 3 into a first chamber 34 and a second chamber 35 by adopting a diversion partition 5, and arranges the powder spraying device 2 and the exhaust gas inlet 33 at the top of the second chamber 35, and arranges the exhaust gas outlet 31 and the adjustable damper 4 on the side wall of the first chamber 34, so that during specific operation, the hot regeneration exhaust gas entering from the exhaust gas inlet 33 can only go down along the second chamber 35 to impact the mineral powder in the powder bin 32, and then continue to go up to the first chamber 34 and be output through the exhaust gas outlet 31, but cannot be directly output from the exhaust gas outlet 31 of the first chamber 34, thereby ensuring that the asphalt fume in the hot regeneration exhaust gas can be effectively removed.

[0045] In some embodiments of the present invention, the powder bin 32 has an inverted cone-shaped structure, which not only facilitates the discharge of excess mineral powder from the bottom of the powder bin 32, but also provides a larger top space for the powder bin 32, so that the hot regeneration exhaust gas and the mineral powder have a larger contact area, thereby ensuring that the asphalt fume in the hot regeneration exhaust gas can be more fully integrated with the mineral powder, thereby more reliably removing the asphalt fume in the hot regeneration exhaust gas.

[0046] In some embodiments of the present invention, a slope 351 is formed at the lower part of the second chamber 35 on the side away from the diversion baffle 5 for gradually narrowing the second chamber 35 from top to bottom; by adopting the above slope 351 design, on the one hand, the hot regeneration exhaust gas can be better guided to enter the powder bin 32 to merge with the mineral powder, and on the other hand, the second chamber 35 is gradually narrowed from top to bottom. After passing through the second chamber 35, the hot regeneration exhaust gas can better impact the mineral powder in the powder bin 32, so that the mineral powder can be better lifted and fully merged with the asphalt fume of the hot regeneration exhaust gas.

[0047] In some embodiments of the present invention, the oil fume removal device 100 further includes a first level meter 61 disposed on the upper part of the powder bin 32 and a second level meter 62 disposed on the lower part of the powder bin 32, wherein the first level meter 61 is used to detect a high level, and the second level meter 62 is used to detect a low level. In the specific operation of the present invention, when the first level meter 61 detects that the storage amount of mineral powder in the powder bin 32 reaches a preset high level, the bottom of the powder bin 32 is controlled to be opened for powder discharge, and the adjustable damper 4 is controlled to increase the opening and closing angle to increase the passing rate of the mineral powder; and when the second level meter 62 detects that the storage amount of mineral powder in the powder bin 32 reaches a preset low level, the bottom of the powder bin 32 is controlled to be closed for powder discharge, and the adjustable damper 4 is controlled to reduce the opening and closing angle to reduce the passing rate of the mineral powder.

[0048] In some embodiments of the present invention, the adjustable damper 4 is an electrically adjustable shutter damper, so as to control the adjustable damper 4 to automatically adjust the opening and closing angle.

[0049] In some embodiments of the present invention, an automatic discharge valve 7 is provided at the bottom of the powder bin 32 to control the automatic discharge of the bottom of the powder bin 32 by using the automatic discharge valve 7; as a specific embodiment of the present invention, the automatic discharge valve 7 can be a pneumatic valve. Embodiment 2

[0050] See also Figures 1 to 4 As shown, a method for removing oil fume from factory-mixed hot regeneration tail gas of the present invention uses the above-mentioned oil fume removal device 100 for factory-mixed hot regeneration tail gas. The specific structure and technical effects that can be obtained by the oil fume removal device 100 are exactly the same as those of the first embodiment. Please refer to the detailed introduction of the first embodiment for details, which will not be repeated here.

[0051] The method comprises the following steps:

[0052] The hot regeneration exhaust gas generated by the regeneration drum is introduced into the oil fume removal box 3 through the exhaust gas inlet 33, and at the same time, each powder spraying device 2 is controlled to continuously spray mineral powder toward the hot regeneration exhaust gas, so that the mineral powder and the asphalt oil fume in the hot regeneration exhaust gas are once fused and coated with powder to form particles and precipitated into the powder bin 32, so as to preliminarily remove the asphalt oil fume in the hot regeneration exhaust gas; in the specific implementation of the present invention, the induced draft fan of the bag filter 1 can be used to form a negative pressure and realize the introduction of the hot regeneration exhaust gas generated in the regeneration drum into the oil fume removal box 3;

[0053] The hot regeneration exhaust gas after the first fusion continues to rush downward to the powder bin 32 at the lower part of the fume removal box 3. The mineral powder in the powder bin 32 will be lifted upward under the impact of the airflow of the hot regeneration exhaust gas, and form a local cyclone reflux with the hot regeneration exhaust gas at the upper part of the powder bin 32, so that the mineral powder and the asphalt fume in the hot regeneration exhaust gas are fully fused and coated for a second time and form particles to settle in the powder bin 32, so as to further effectively remove the asphalt fume in the hot regeneration exhaust gas.

[0054] The hot regeneration tail gas after the asphalt fume is removed is introduced into the bag filter 1 through the tail gas outlet 31 for dust removal and filtration.

[0055] In some embodiments of the present invention, in order to keep the mineral powder storage in the powder bin 32 in a dynamic equilibrium state, thereby ensuring that the mineral powder can be fully integrated with the asphalt fume in the hot regeneration tail gas, the method includes:

[0056] like Figure 3 As shown, when it is detected that the mineral powder storage amount in the powder bin 32 reaches a preset high material level, the bottom of the powder bin 32 is controlled to open for powder discharge, and the adjustable damper 4 is controlled to increase the opening and closing angle, that is, the gap of the adjustable damper 4 becomes larger, so that the passing rate of the mineral powder is increased, thereby reducing the powder storage rate;

[0057] like Figure 4As shown, when it is detected that the mineral powder storage amount in the powder bin 32 reaches a preset low material level, the bottom of the powder bin 32 is controlled to close to discharge the powder, and at the same time, the adjustable damper 4 is controlled to reduce the opening and closing angle, that is, the gap of the adjustable damper 4 becomes smaller, so that the passage rate of the mineral powder is reduced, thereby increasing the powder storage rate.

[0058] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A device for removing oil smoke from factory-mixed hot regeneration tail gas, characterized in that: It includes a bag dust collector, a powder spraying device and a fume removal box; An exhaust gas outlet is formed in the middle of the oil fume removal box, and an adjustable damper is provided at the exhaust gas outlet. The input end of the bag filter is connected to the exhaust gas outlet. A powder bin for storing mineral powder is formed at the lower part of the oil fume removal box; an exhaust gas inlet is arranged at the top of the oil fume removal box, and a plurality of powder spraying devices are arranged on the inner top wall of the oil fume removal box around the exhaust gas inlet.

2. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 1, characterized in that: The upper and middle part of the fume removal box is divided into a first chamber and a second chamber by a diversion partition, and the lower end of the diversion partition extends downward to a position close to the powder bin; the powder spraying device and the exhaust gas inlet are arranged on the top of the second chamber, and the exhaust gas outlet and the adjustable damper are arranged on the side wall of the first chamber.

3. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 1, characterized in that: The powder bin is in an inverted cone-shaped structure.

4. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 2, characterized in that: A slope for gradually narrowing the second chamber from top to bottom is formed at a side of the lower portion of the second chamber away from the flow dividing baffle.

5. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 1, characterized in that: It also includes a first material level meter arranged at the upper part of the powder bin and a second material level meter arranged at the lower part of the powder bin.

6. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 1, characterized in that: The adjustable damper is an electrically adjustable shutter damper.

7. The oil fume removal device for hot regeneration exhaust gas from a plant as claimed in claim 1, characterized in that: The bottom of the powder bin is equipped with an automatic discharge valve.

8. A method for removing oil smoke from factory-mixed hot regeneration tail gas, characterized in that: The method uses the oil fume removal device for factory-mixed hot regeneration tail gas according to any one of claims 1 to 7; the method comprises the following steps: The hot regeneration exhaust gas generated by the regeneration drum is introduced into the oil fume removal box through the exhaust gas inlet, and at the same time, each powder spraying device is controlled to continuously spray mineral powder toward the hot regeneration exhaust gas, so that the mineral powder and the asphalt oil fume in the hot regeneration exhaust gas are fused and coated to form particles and precipitate in the powder bin; The hot regeneration exhaust gas after the first fusion continues to rush downward to the powder bin at the bottom of the fume removal box. The mineral powder in the powder bin will be lifted up under the impact of the airflow of the hot regeneration exhaust gas, and form a local cyclone reflux with the hot regeneration exhaust gas at the upper part of the powder bin, so that the mineral powder and the asphalt fume in the hot regeneration exhaust gas are fully fused and coated for the second time to form particles and settle in the powder bin; The hot regeneration exhaust gas after the asphalt fume is removed is introduced into the bag filter through the exhaust gas outlet for dust removal and filtration.

9. The method for removing oil smoke from factory-mixed hot regeneration tail gas as claimed in claim 8, characterized in that: The method comprises: When it is detected that the mineral powder storage volume in the powder bin reaches the preset high material level, the bottom of the powder bin is controlled to open to discharge the powder, and at the same time, the adjustable air door is controlled to increase the opening and closing angle to increase the passing rate of the mineral powder; When it is detected that the mineral powder storage amount in the powder bin reaches the preset low material level, the bottom of the powder bin is controlled to close to discharge the powder, and at the same time the adjustable air door is controlled to reduce the opening and closing angle to reduce the passing rate of the mineral powder.

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