Flue gas purification treatment device for power plant

Abstract

The invention provides a power plant flue gas purification treatment device which comprises a box body, a collecting hopper is communicated with the bottom of the box body, a bracket is slidably arranged on one side, close to the collecting hopper, in the box body in the direction perpendicular to the axis of an ash discharge port, a partition plate is arranged on one side, close to the bottom of an air outlet, in the box body and is parallel to the bracket, and a plurality of air blowing holes are formed in the partition plate; bag-shaped filter screens are arranged at the positions, corresponding to the blowing holes, of the partition plate in the direction of the bracket, the bag-shaped filter screens are movably connected with the bracket, air injection dust removal assemblies are arranged above the bag-shaped filter screens, and the bracket is connected with an auxiliary dust removal assembly used for controlling the bracket to slide in the box body. The bag-shaped filter screen is filled with gas through the air injection dust removal assembly, so that dust attached to the outer wall of the bag-shaped filter screen is blown away from the bag-shaped filter screen, and meanwhile, the auxiliary dust removal assembly can control the bracket to drive the bag-shaped filter screen to violently shake, so that the dust cleaning effect on the outer surface of the bag-shaped filter screen is enhanced in an auxiliary manner; and the thorough dust removal operation on the bag-shaped filter screen is completed.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas purification, and in particular to a flue gas purification treatment device for a power plant. Background Art

[0002] With increasingly stringent environmental protection requirements, power plant flue gas purification technology will develop in the direction of higher efficiency, lower cost and environmental protection. Power plant flue gas purification is a complex and important process that requires the use of a variety of technical means to remove harmful substances in flue gas. Through continuous technological innovation and optimization of treatment processes, we can better protect the environment and human health.

[0003] The flue gas purification process of power plants usually includes the following steps: 1. Flue gas collection: The flue gas generated by the power plant is collected through flue ducts, dust collectors and other equipment. 2. Pretreatment: The collected flue gas is pretreated, such as crushing, screening, drying, etc., for subsequent treatment. 3. Desulfurization: Wet or dry desulfurization technology is used to remove sulfur dioxide from the flue gas. 4. Denitrification: Use technologies such as SCR or SNCR to reduce the content of nitrogen oxides in the flue gas. 5. Dust removal: Electrostatic precipitator, bag filter or wet dust removal are used to further purify the flue gas. 6. Other purification: According to needs, the flue gas may also be further purified by equipment such as acid removal tower, activated carbon adsorber, demercuration device, etc. 7. Emission: The flue gas after purification is discharged into the atmosphere through the chimney. Before emission, pollutant concentration detection is usually carried out to ensure that the emission meets the standard.

[0004] When using a bag dust collector, a lot of dust will adhere to the outside of the bag body. Traditionally, air blowing is used to clean the dust on the bag body. Although this method can remove the dust, it may not be cleaned thoroughly enough. Therefore, a flue gas purification device for a power plant that can clean the dust thoroughly is proposed. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To achieve the above-mentioned object, the present invention proposes a flue gas purification device for a power plant, comprising a box body, a collecting hopper is connected to the bottom of the box body, an air inlet is provided at one end of the box body side wall close to the collecting hopper, an air outlet is provided at one end of the box body side wall away from the collecting hopper, and an ash discharge valve is connected to the collecting hopper toward the side away from the box body;

[0007] A bracket is provided in the box body on one side near the collecting bucket and is slidable along the axis direction of the vertical ash discharge port, a partition plate is provided in the box body on one side near the bottom of the air outlet and is parallel to the bracket, a plurality of blowing holes are provided on the partition plate, a ventilation gap for gas to pass through is provided on the bracket, a bag filter is provided on the partition plate corresponding to each blowing hole position toward the bracket, the bag filter is movably connected to the bracket, a jet dust removal assembly is provided above the bag filter, the jet dust removal assembly includes a plurality of blowing nozzles arranged one by one corresponding to the blowing holes to allow gas to be passed into each of the bag filters, and the bracket is connected to an auxiliary dust removal assembly for controlling the sliding of the bracket in the box.

[0008] The present invention uses a jet dust removal component to inject gas into the bag filter, thereby blowing dust attached to the outer wall of the bag filter away from the bag filter. At the same time, the auxiliary dust removal component can control the bracket to drive the bag filter to shake violently, thereby assisting in strengthening the dust cleaning effect on the outer surface of the bag filter and completing the thorough cleaning operation of the bag filter.

[0009] Optionally, a plurality of the blowing holes are arranged in an array, and the bag-shaped filter nets are arranged in the same array corresponding to the positions of the blowing holes.

[0010] Furthermore, the jet assembly includes a plurality of first pipes arranged above the partition plate, each of the first pipes is correspondingly arranged above a plurality of blowing holes, and the blowing nozzle is connected to the first pipe on the side facing the blowing hole, the plurality of first pipes are connected to each other through a plurality of second pipes, and one end of any one of the first pipes extends out of the side wall of the box body to be connected to a pipe connector, the free end of the pipe connector is connected to a gas cylinder, and an electromagnetic pulse valve for controlling the opening or closing of the gas cylinder is provided at the opening position of the gas cylinder.

[0011] Furthermore, the auxiliary dust removal component includes a telescopic power member fixedly arranged on the outer wall of the box body at a position corresponding to the bracket, the output end of the telescopic power member passes through the side wall of the box body and is fixedly connected to a connecting plate, the connecting plate is fixedly connected to one end of the bracket with a plurality of connecting rods, and the bracket is provided with a plurality of supports fixedly connected to the connecting rods one by one.

[0012] Furthermore, the bracket is provided with a swing component for driving the bagged filter to swing at multiple angles, the reporting component includes a lower connecting seat fixedly connected to the bracket, a double ball head rod is movably connected to the lower connecting seat, the other end of the double ball head rod is movably connected to an upper connecting seat, the upper connecting plate is fixedly connected to a bottom plate on the side facing away from the bracket, and the bagged filter is fixedly connected to the bottom plate at one end facing the bracket.

[0013] Furthermore, a plurality of driving rods are vertically and centrally symmetrically arranged on the surface of the bottom plate facing the partition plate, the driving rods are arranged inside the bag-shaped filter net, and the plurality of driving rods are fixedly connected to the same fixing ring facing the partition plate, and the fixing ring is movably connected to the partition plate.

[0014] Furthermore, a universal ball is movably arranged in the blowing hole, a ventilation hole is penetrated in the universal ball, one end of the ventilation hole is arranged toward the blowing nozzle, and the other end of the ventilation hole is fixedly connected to the fixing ring.

[0015] Furthermore, the rotation angle of the universal ball needs to ensure that the ventilation hole does not deviate from the blowing coverage angle of the blowing nozzle.

[0016] Furthermore, a bracket is arranged on the periphery of the collecting hopper below the box body.

[0017] Furthermore, a viewing port is provided on a side of the box body facing away from the collecting hopper, and a top cover is detachably and fixedly provided on the box body opposite to the viewing port.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cutaway structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the pulse solenoid valve, the cross pipe and the air nozzle of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the partition plate, the connecting ball and the bag body of the present invention;

[0024] Figure 5 This is a schematic diagram of the exploded structure of the connection ball, the vertical rod and the bag body of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the upper connecting seat, the supporting plate and the cylinder of the present invention;

[0026] Figure 7 It is a schematic diagram of the exploded structure of the upper connecting seat, the ball head rod and the lower connecting seat of the present invention.

[0027] Description of reference numerals:

[0028] 1. Box body; 2. Collecting bucket; 3. Ash discharge valve; 4. Bracket; 5. Air inlet; 6. Top cover; 7. Air outlet; 8. First pipeline; 9. Air nozzle; 10. Second pipeline; 11. Connector; 12. Pulse solenoid valve; 13. Gas cylinder; 14. Partition plate; 15. Universal ball; 16. Fixing ring; 17. Driving rod; 18. Bottom plate; 19. Bag filter; 20. Upper connecting seat; 21. Double ball head rod; 22. Lower connecting seat; 23. Bracket; 24. Support; 25. Connecting rod; 26. Connecting plate; 27. Telescopic power part. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The present invention provides a flue gas purification device for a power plant, as shown below Figures 1 to 7 Elaborate in detail.

[0031] A flue gas purification device for a power plant, comprising a box body 1, a collecting hopper 2 is connected to the bottom of the box body 1, an air inlet 5 is arranged at one end of the side wall of the box body 1 close to the collecting hopper 2, an air outlet 7 is arranged at one end of the side wall of the box body 1 away from the collecting hopper 2, and an ash discharge valve 3 is connected to the side of the collecting hopper 2 away from the box body 1;

[0032] A bracket 23 is provided in the box body 1 on one side near the collecting bucket 2 so as to slide along the axis direction of the vertical ash discharge port. A partition plate 14 is provided in the box body 1 on the bottom side near the air outlet 7 and parallel to the bracket 23. The partition plate 14 is provided with a plurality of blowing holes. The bracket 23 is provided with a ventilation interval for gas to pass through. A bag filter 19 is provided in the direction of the bracket 23 corresponding to each blowing hole position of the partition plate 14. The bag filter is movably connected to the bracket 23. A jet dust removal assembly is provided above the bag filter 19. The jet dust removal assembly includes a plurality of blowing nozzles arranged one by one corresponding to the blowing holes so that gas can be passed into each bag filter 19. The bracket 23 is connected with an auxiliary dust removal assembly for controlling the sliding of the bracket 23 in the box body 1.

[0033] After the dust-containing airflow enters the box body 1 from the air inlet 5, a closed environment is formed in the box body 1 due to the arrangement of the partition plate 14 and the dust discharge valve 3. Under the action of air pressure, the dust-containing airflow enters the bag filter 19 and is discharged from the blowing hole along the air flow channel in the bag filter 19. The discharged airflow is discharged from the air outlet 7. At this time, the dust is filtered out by the bag filter 19, thereby completing the filtering operation.

[0034] When the bag filter 19 needs to be dusted, the present invention fills gas into the bag filter 19 through the jet dust removal assembly, and the air blowing nozzle blows air into the air holes one by one, and the gas enters the bag filter 19 from the air holes, and enters the box body 1 in the reverse direction under the action of air pressure, thereby driving the dust attached to the outer wall of the bag filter 19 to leave the bag filter 19, so as to realize the cleaning of the bag filter 19;

[0035] At the same time, the auxiliary dust removal component can control the bracket 23 to drive the bag filter 19 to shake violently, thereby assisting in strengthening the dust cleaning effect on the outer surface of the bag filter 19 and completing the thorough cleaning operation of the bag filter 19.

[0036] In some embodiments, a plurality of blowing holes are arranged in an array, and the bag filter 19 is arranged in the same array at the positions corresponding to the blowing holes. The blowing holes and the bag filter 19 are arranged in an array, so that the bag filter 19 can be evenly arranged in the space of the box 1, so that the gas can be evenly filtered after entering the box 1, reducing the situation where some bag filter 19 filters a large amount of gas while other bag filter 19 filters a small amount of gas. In one embodiment, the blowing holes are arranged in a rectangular array, and the bag filter 19 corresponding to the blowing holes are also arranged in a rectangular array.

[0037] In some embodiments, the jet assembly includes a plurality of first pipes 8 arranged above the partition plate 14, each of the first pipes 8 is correspondingly arranged above a plurality of blowing holes, and the blowing nozzle is connected to the first pipe 8 on the side facing the blowing hole, the plurality of first pipes 8 are connected to each other through a plurality of second pipes 10, and one end of any first pipe 8 extends out of the side wall of the box body 1 and is connected to a pipe connector 11, the free end of the pipe connector 11 is connected to a gas cylinder 13, and an electromagnetic pulse valve for controlling the opening or closing of the gas cylinder 13 is arranged at the opening position of the gas cylinder 13.

[0038] A plurality of first pipes 8 and a plurality of second pipes 10 form a pipe network, which can realize the gas supply effect to a plurality of blowing nozzles under the premise that only one first pipe 8 is connected to the gas cylinder 13; the setting of the electromagnetic pulse valve can effectively and accurately control the on-off status of the gas supply.

[0039] In some embodiments, the auxiliary dust removal assembly includes a telescopic power member 27 fixedly arranged on the outer wall of the box body 1 at a position corresponding to the bracket 23. The telescopic power member 27 can be one of a cylinder, an oil cylinder, an electric telescopic rod, etc. that can realize a telescopic control device. In one embodiment, the telescopic power member 27 is set as a cylinder. The output end of the telescopic power member 27 passes through the side wall of the box body 1 and is fixedly connected with a connecting plate 26. The connecting plate 26 is fixedly connected with a plurality of connecting rods 25 at one end toward the bracket 23. The bracket 23 is provided with a plurality of supports 24 that are fixedly connected with the connecting rods 25 one by one. The telescopic power member 27 controls the plurality of connecting rods 25 through the connecting plate 26 to drive the bracket 23 to slide back and forth quickly in the box body 1, thereby driving the bag filter 19 that is movably connected above the bracket 23 to shake violently. Through the violent shaking, the dust attached to the outer wall of the bag filter 19 can be separated from the outer surface of the bag filter 19, thereby further improving the dust removal effect.

[0040] In some embodiments, a swing assembly for driving the bagged filter to swing at multiple angles is provided on the bracket 23. The assembly includes a lower connecting seat 22 fixedly connected to the bracket 23, a double ball head rod 21 movably connected to the lower connecting seat 22, and the other end of the double ball head rod 21 movably connected to the upper connecting seat 20. The upper connecting plate 26 is fixedly connected to the bottom plate 18 on the side away from the bracket 23, and the bagged filter 19 is fixedly connected to the bottom plate 18 at one end facing the bracket 23. Both ends of the double ball head rod 21 have a spherical structure, and the two spherical structures are rotatably connected to the upper connecting seat 20 and the lower connecting seat 22 respectively to form two universal joints. When the telescopic power member 27 drives the bracket to slide back and forth quickly, the bottom plate 18 can be swung at multiple angles due to the setting of the two universal joints, thereby driving the bagged filter 19 to swing violently at multiple angles, intensifying the swinging effect of the bagged filter 19 to achieve rapid shaking off of dust, thereby improving the dust removal efficiency.

[0041] In some embodiments, a plurality of driving rods 17 are vertically arranged on the surface of the bottom plate 18 facing the partition plate 14 in a centrally symmetrical manner. The driving rods 17 are arranged inside the bag filter 19. The plurality of driving rods 17 are fixedly connected to the same fixing ring 16 facing the partition plate 14. The fixing ring 16 is movably connected to the partition plate 14. The arrangement of the plurality of driving rods 17 can effectively drive the bag filter 19 away from one end of the bottom plate 18 to swing synchronously, thereby avoiding the situation where the bag filter 19 away from one end of the bottom plate 18 swings in a small amplitude due to inertia, resulting in poor dust removal effect. The arrangement of the fixing ring 16 can fix the ends of the plurality of driving rods 17 as a whole, reduce the occurrence of collision or dislocation between the plurality of driving rods 17, and avoid the situation where the end of the driving rod 17 punctures the bag filter 19.

[0042] In some embodiments, since the fixing ring 16 is arranged at the end of the driving rod 17, when the telescopic power member 27 drives the bottom plate 18 to swing rapidly and violently, the fixing ring 16 at the end of the driving rod 17 will generate a large kinetic energy, so that the fixing ring 16 and the external bag filter 19 will produce a violent impact collision, but if the fixing ring 16 is fixed to the partition plate 14, the driving rod 17 and the bottom plate 18 will be fixedly connected and cannot be swung, so a universal ball 15 is movably arranged in the blowing hole, and a ventilation hole is arranged through the universal ball 15, one end of the ventilation hole is arranged toward the blowing nozzle, and the other end of the ventilation hole is fixedly connected to the fixing ring 16. After the universal ball 15 is fixedly connected to the fixing ring 16, the fixing ring 16 swings at multiple angles, which will drive the universal ball 15 to rotate, and due to the setting of the fixing ring 16, the fixing ring 16 will produce an obstruction with the blowing hole wall, and the universal ball 15 will not rotate too much to cause the ventilation hole to transition out of the blowing range of the upper blowing nozzle. Furthermore, since the fixing ring 16 is fixedly connected to the universal ball 15, it will no longer collide with the bag filter 19, thereby protecting the bag filter 19 and achieving

[0043] In some embodiments, the rotation angle of the universal ball 15 needs to ensure that the ventilation hole does not deviate from the blowing coverage angle of the air blowing nozzle. When the telescopic power member 27 drives the bag filter 19 to shake violently, the air blowing nozzle can blow gas into the ventilation hole of the universal ball 15, thereby facilitating the joint operation of the jet dust removal component and the auxiliary dust removal component, and further enhancing the dust removal effect.

[0044] In some embodiments, a bracket 4 is provided below the box body 1 and outside the collecting hopper 2. The arrangement of the bracket 4 can stably raise the box body 1, thereby facilitating the arrangement of the collecting hopper 2 and the pipeline connected to the ash discharge gate.

[0045] In some embodiments, a viewing port is provided on the side of the box 1 away from the collecting hopper 2, and a top cover 6 is detachably fixedly provided on the box 1 opposite to the viewing port. The viewing port can be convenient for the staff to observe and inspect the internal conditions of the box 1, and the top cover 6 can cover the viewing port, forming a closed environment when the box 1 is working normally, ensuring that the filtered gas will not be contaminated again.

[0046] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flue gas purification device for a power plant, characterized in that: It comprises a box body, the bottom of the box body is connected to a collecting hopper, the side wall of the box body is provided with an air inlet at one end close to the collecting hopper, the side wall of the box body is provided with an air outlet at one end away from the collecting hopper, and the collecting hopper is connected to a side away from the box body and is provided with an ash discharge valve; A bracket is provided in the box body on one side near the collecting bucket and is slidable along the axis direction of the vertical ash discharge port, a partition plate is provided in the box body on one side near the bottom of the air outlet and is parallel to the bracket, a plurality of blowing holes are provided on the partition plate, a ventilation gap for gas to pass through is provided on the bracket, a bag filter is provided on the partition plate corresponding to each blowing hole position toward the bracket, the bag filter is movably connected to the bracket, a jet dust removal assembly is provided above the bag filter, the jet dust removal assembly includes a plurality of blowing nozzles arranged one by one corresponding to the blowing holes to allow gas to be passed into each of the bag filters, and the bracket is connected to an auxiliary dust removal assembly for controlling the sliding of the bracket in the box.

2. A flue gas purification device for a power plant as claimed in claim 1, characterized in that: The blowing holes are arranged in a plurality in an array, and the bag-shaped filter screens are arranged in the same array corresponding to the positions of the blowing holes.

3. A flue gas purification device for a power plant as claimed in claim 2, characterized in that: The jet assembly includes a plurality of first pipes arranged above the partition plate, each of the first pipes is correspondingly arranged above a plurality of blowing holes, and the blowing nozzle is connected to the first pipe on the side facing the blowing hole, the plurality of first pipes are connected to each other through a plurality of second pipes, and one end of any one of the first pipes extends out of the side wall of the box body to be connected to a pipe connector, the free end of the pipe connector is connected to a gas cylinder, and an electromagnetic pulse valve for controlling the opening or closing of the gas cylinder is arranged at the opening position of the gas cylinder.

4. A flue gas purification device for a power plant as claimed in claim 1, characterized in that: The auxiliary dust removal assembly includes a telescopic power member fixedly arranged at a bracket position on the outer side wall of the box body, the output end of the telescopic power member passes through the side wall of the box body and is fixedly connected to a connecting plate, the connecting plate is fixedly connected to one end of the bracket with multiple connecting rods, and the bracket is provided with multiple supports fixedly connected to the connecting rods one by one.

5. A flue gas purification device for a power plant as claimed in claim 4, characterized in that: The bracket is provided with a swing component for driving the bagged filter to swing at multiple angles, the reporting component includes a lower connecting seat fixedly connected to the bracket, a double ball head rod is movably connected to the lower connecting seat, the other end of the double ball head rod is movably connected to an upper connecting seat, the upper connecting plate is fixedly connected to a bottom plate on the side facing away from the bracket, and the bagged filter is fixedly connected to the bottom plate at one end facing the bracket.

6. A flue gas purification device for a power plant as claimed in claim 5, characterized in that: A plurality of driving rods are vertically and symmetrically arranged on the surface of the bottom plate facing the partition plate, and the driving rods are arranged inside the bag-shaped filter net. The plurality of driving rods are fixedly connected to the same fixing ring facing the partition plate, and the fixing ring is movably connected to the partition plate.

7. A flue gas purification device for a power plant as claimed in claim 6, characterized in that: A universal ball is movably arranged in the air blowing hole, a ventilation hole is penetrated in the universal ball, one end of the ventilation hole is arranged toward the air blowing nozzle, and the other end of the ventilation hole is fixedly connected to the fixing ring.

8. A flue gas purification device for a power plant as claimed in claim 7, characterized in that: The rotation angle of the universal ball needs to ensure that the ventilation hole does not deviate from the blowing coverage angle of the blowing nozzle.

9. A flue gas purification device for a power plant as claimed in claim 1, characterized in that: A bracket is arranged on the periphery of the collecting hopper below the box body.

10. The flue gas purification device for a power plant according to claim 1, characterized in that: The box body is provided with an inspection port on one side away from the collecting hopper, and the box body is provided with a top cover detachably and fixedly opposite to the inspection port.

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