Flue gas purification treatment apparatus for power plant

Abstract

The present invention provides a flue gas purification treatment apparatus for a power plant, comprising a box body. A collection hopper is provided in communication with the bottom of the box body. A bracket is slidably provided within the box body on the side close to the collection hopper along a direction perpendicular to an axis of a dust discharge port. A partition plate is provided within the box body on the side close to the bottom of a gas outlet and parallel to the bracket. The partition plate is provided with a plurality of gas blowing holes. A bag-shaped filter mesh is provided on the partition plate at a position corresponding to each gas blowing hole in a direction facing toward the bracket. The bag-shaped filter meshes are movably connected to the bracket. A gas-jet dust removal assembly is provided above the bag-shaped filter meshes. The bracket is connected to an auxiliary dust removal assembly for controlling the bracket to slide within the box body. According to the present invention, gas is filled into the bag-shaped filter meshes by means of the gas-jet dust removal assembly, so that dust attached to outer walls of the bag-shaped filter meshes is blown away from the bag-shaped filter meshes. In addition, the auxiliary dust removal assembly can control the bracket to drive the bag-shaped filter meshes to violently shake, thereby assisting in enhancing the dust cleaning effect on outer surfaces of the bag-shaped filter meshes, and completing a thorough dust cleaning operation on the bag-shaped filter meshes.

Description

A flue gas purification device for power plants Technical Field

[0001] This invention relates to the field of flue gas purification technology, and in particular to a flue gas purification and treatment device for power plants. Background Technology

[0002] With increasingly stringent environmental protection requirements, power plant flue gas purification technology will develop towards greater efficiency, lower cost, and environmental friendliness. Power plant flue gas purification is a complex and crucial process, requiring the use of various technologies to remove harmful substances from the 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 in power plants typically includes the following steps: 1. Flue gas collection: The flue gas generated by the power plant is collected through equipment such as flue ducts and dust collectors. 2. Pretreatment: The collected flue gas undergoes pretreatment, such as crushing, screening, and drying, for subsequent processing. 3. Desulfurization: Sulfur dioxide is removed from the flue gas using wet or dry desulfurization technologies. 4. Denitrification: The nitrogen oxide content in the flue gas is reduced using technologies such as SCR or SNCR. 5. Dust removal: The flue gas is further purified using methods such as electrostatic precipitators, bag filters, or wet scrubbers. 6. Other purification: As needed, the flue gas may also undergo further purification through equipment such as acid removal towers, activated carbon adsorbers, and mercury removal devices. 7. Emission: The purified flue gas is discharged into the atmosphere through a chimney. Before emission, pollutant concentration testing is usually performed to ensure compliance with emission standards.

[0004] When using bag filters, a lot of dust will adhere to the outside of the bags. Traditionally, the dust on the bags is cleaned by blowing air. However, although this method can remove dust, it is not thorough enough. Therefore, a power plant flue gas purification device that can thoroughly clean dust is proposed. Summary of the Invention

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

[0006] To achieve the above objectives, the present invention proposes a flue gas purification and treatment device for power plants, including a box body, a collection hopper connected to the bottom of the box body, an air inlet provided at the end of the side wall of the box body near the collection hopper, an air outlet provided at the end of the side wall of the box body away from the collection hopper, and an ash discharge valve connected to the side of the collection hopper away from the box body.

[0007] A bracket is slidably mounted inside the box along the vertical axis of the ash discharge port, near the collection hopper. A partition plate is mounted inside the box parallel to the bracket, near the bottom of the air outlet. The partition plate has multiple air blowing holes. The bracket has ventilation intervals for gas passage. A bag-shaped filter screen is mounted on the partition plate facing the bracket, corresponding to each air blowing hole. The bag-shaped filter screen is movably connected to the bracket. An air jet dust removal assembly is mounted above the bag-shaped filter screen. The air jet dust removal assembly includes several air nozzles that correspond one-to-one with the air blowing holes to allow gas to be introduced into each bag-shaped filter screen. An auxiliary dust removal assembly is connected to the bracket to control the sliding movement of the bracket inside the box.

[0008] This invention uses an air jet dust removal component to inject gas into the bag filter, thereby blowing away the dust adhering to the outer wall of the bag filter. At the same time, the auxiliary dust removal component can control the bracket to cause the bag filter to shake violently, thereby helping to enhance the dust cleaning effect on the outer surface of the bag filter and completing the thorough dust removal operation of the bag filter.

[0009] Optionally, multiple air holes are arranged in an array, and the bag-shaped filter screens are arranged in the same array corresponding to the positions of the air holes.

[0010] Furthermore, the jet assembly includes a plurality of first pipes disposed above the partition plate, each first pipe being disposed above a plurality of air holes, and the air nozzle being connected to the side of the first pipe facing the air holes. The plurality of first pipes are connected to each other through a plurality of second pipes, and one end of any first pipe extends out of the side wall of the housing and is 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 disposed at the opening position of the gas cylinder.

[0011] Furthermore, the auxiliary dust removal component includes a telescopic power component fixedly installed on the outer side wall of the housing at the position corresponding to the bracket. The output end of the telescopic power component passes through the side wall of the housing and is fixedly connected to a connecting plate. Multiple connecting rods are fixedly connected to the end of the connecting plate facing the bracket. Multiple supports are provided on the bracket and are fixedly connected to the connecting rods one by one.

[0012] Furthermore, the bracket is provided with a swing assembly that drives the bagged filter screen to swing at multiple angles. The swing assembly includes a lower connecting seat fixedly connected to the bracket, a double ball joint rod movably connected to the lower connecting seat, an upper connecting seat movably connected to the other end of the double ball joint rod, a bottom plate fixedly connected to the side of the upper connecting plate away from the bracket, and the bagged filter screen fixedly connected to the bottom plate at the end facing the bracket.

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

[0014] Furthermore, a universal ball is movably disposed inside the air blowing hole, and a ventilation hole is disposed through the universal ball. One end of the ventilation hole is disposed facing the air blowing nozzle, and the other end of the ventilation hole is fixedly connected to the fixing ring.

[0015] Furthermore, the rotation angle of the omnidirectional ball must ensure that the ventilation hole does not detach from the air blowing nozzle's air blowing coverage angle.

[0016] Furthermore, a support is provided below the box and around the collection hopper.

[0017] Furthermore, an inspection port is provided on the side of the box away from the collection hopper, and a top cover is detachably and fixedly provided on the box facing the inspection port.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

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

[0021] Figure 2 is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 3 is a schematic diagram of the pulse solenoid valve, horizontal tube and jet nozzle of the present invention;

[0023] Figure 4 is a structural schematic diagram of the separator, connecting ball and bag body of the present invention;

[0024] Figure 5 is an exploded structural diagram of the connecting ball, vertical rod and bag body of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the connecting seat, the support plate and the cylinder of the present invention;

[0026] Figure 7 is an exploded structural diagram of the upper connecting seat, ball joint, and lower connecting seat of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Housing; 2. Collection hopper; 3. Ash discharge valve; 4. Support; 5. Air inlet; 6. Top cover; 7. Air outlet; 8. First pipe; 9. Air nozzle; 10. Second pipe; 11. Connector; 12. Pulse solenoid valve; 13. Gas cylinder; 14. Divider plate; 15. Universal ball joint; 16. Fixing ring; 17. Drive rod; 18. Base plate; 19. Bag filter screen; 20. Upper connecting seat; 21. Double ball joint rod; 22. Lower connecting seat; 23. Bracket; 24. Support; 25. Connecting rod; 26. Connecting plate; 27. Telescopic power component. Detailed Implementation

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

[0030] This invention provides a power plant flue gas purification and treatment device, which will be described in detail below with reference to Figures 1 to 7.

[0031] A flue gas purification and treatment device for a power plant includes a housing 1, a collection hopper 2 connected to the bottom of the housing 1, an air inlet 5 provided on the side wall of the housing 1 near the collection hopper 2, an air outlet 7 provided on the side wall of the housing 1 away from the collection hopper 2, and an ash discharge valve 3 connected to the side of the collection hopper 2 away from the housing 1.

[0032] Inside the housing 1, a bracket 23 is slidably installed along the vertical ash discharge port axis on the side near the collection hopper 2. Inside the housing 1, a partition plate 14 is installed parallel to the bracket 23 on the side near the bottom of the air outlet 7. The partition plate 14 is provided with multiple air blowing holes. The bracket 23 is provided with ventilation intervals for gas to pass through. A bag-shaped filter screen 19 is provided on the partition plate 14 corresponding to each air blowing hole and facing the bracket 23. The bag-shaped filter screen is movably connected to the bracket 23. An air jet dust removal assembly is provided above the bag-shaped filter screen 19. The air jet dust removal assembly includes several air blowing nozzles that correspond one-to-one with the air blowing holes to allow gas to be introduced into each bag-shaped filter screen 19. The bracket 23 is connected to an auxiliary dust removal assembly for controlling the sliding of the bracket 23 inside the housing 1.

[0033] After the dust-laden airflow enters the housing 1 through the air inlet 5, a sealed environment is formed inside the housing 1 due to the partition plate 14 and the dust discharge valve 3. Under the action of air pressure, the dust-laden airflow will enter the bag filter 19 and be discharged from the air blowing hole through the airflow channel inside the bag filter 19. The discharged airflow will be discharged from the air outlet 7. At this time, the dust is filtered out by the bag filter 19, thus completing the filtration operation.

[0034] When dust removal is required for the bag filter 19, the present invention uses an air jet dust removal assembly to fill the bag filter 19 with gas. The air nozzle blows air one-to-one into the air hole. The gas enters the bag filter 19 from the air hole and enters the housing 1 in the opposite direction under the action of air pressure, thereby driving the dust attached to the outer wall of the bag filter 19 away from the bag filter 19, so as to achieve cleaning of the bag filter 19.

[0035] Meanwhile, the auxiliary dust removal component can control the bracket 23 to drive the bag filter 19 to shake violently, thereby helping to enhance the dust cleaning effect on the outer surface of the bag filter 19 and completing the thorough dust cleaning operation of the bag filter 19.

[0036] In some embodiments, multiple air holes are arranged in an array, and the bag filters 19 are arranged in the same array corresponding to the air holes. The array arrangement of the air holes and bag filters 19 ensures that the bag filters 19 are evenly distributed within the space of the housing 1, thereby ensuring uniform filtration of gas entering the housing 1 and reducing the occurrence of some bag filters 19 filtering larger volumes of gas than others. In one embodiment, the air holes are arranged in a rectangular array, and the bag filters 19 are also arranged in a rectangular array corresponding to the air holes.

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

[0038] Multiple first pipes 8 and multiple second pipes 10 form a pipe network, which can achieve the effect of supplying gas to multiple air nozzles even when only one first pipe 8 is connected to a gas cylinder 13; the electromagnetic pulse valve can effectively and accurately control the on and off status of the gas supply.

[0039] In some embodiments, the auxiliary dust removal assembly includes a telescopic power component 27 fixedly disposed on the outer wall of the housing 1 at a position corresponding to the bracket 23. The telescopic power component 27 can be one of the following: a cylinder, a hydraulic cylinder, or an electric telescopic rod, which can realize telescopic control. In one embodiment, the telescopic power component 27 is configured as a cylinder. The output end of the telescopic power component 27 is fixedly connected to a connecting plate 26 through the side wall of the housing 1. Multiple connecting rods 25 are fixedly connected to the end of the connecting plate 26 facing the bracket 23. Multiple supports 24 are provided on the bracket 23, which are fixedly connected to the connecting rods 25 one by one. The telescopic power component 27 controls the multiple connecting rods 25 simultaneously through the connecting plate 26 to drive the bracket 23 to slide back and forth rapidly within the housing 1, thereby causing the bag-shaped filter 19 movably connected above the bracket 23 to shake violently. Through violent shaking, the dust adhering to the outer wall of the bag-shaped filter 19 can be removed from the outer surface of the bag-shaped filter 19, thereby further improving the dust removal effect.

[0040] In some embodiments, the bracket 23 is provided with a swing assembly that drives the bag filter to swing at multiple angles. The swing 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, an upper connecting seat 20 movably connected to the other end of the double ball-head rod 21, a base plate 18 fixedly connected to the side of the upper connecting plate 26 away from the bracket 23, and a bag filter 19 fixedly connected to the base plate 18 at the end facing the bracket 23. Both ends of the double ball-head rod 21 have spherical structures, and the two spherical structures are rotatably connected to the upper connecting seat 20 and the lower connecting seat 22 respectively, forming two universal joints. When the telescopic power member 27 drives the bracket to slide back and forth quickly, the two universal joints allow the base plate 18 to swing at multiple angles, thereby driving the bag filter 19 to swing violently at multiple angles, intensifying the swinging effect of the bag filter 19 to quickly shake off dust, thereby improving dust removal efficiency.

[0041] In some embodiments, a plurality of driving rods 17 are centrally symmetrically and vertically arranged on the surface of the base plate 18 facing the partition plate 14. The driving rods 17 are disposed inside the bag filter 19, and the plurality of driving rods 17 are fixedly connected to the same fixing ring 16 on the side 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 at the end away from the base plate 18 to swing synchronously, avoiding the situation where the bag filter 19 at the end away from the base plate 18 has a small swing 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, reducing the occurrence of collisions or misalignments between the plurality of driving rods 17, and preventing the ends of the driving rods 17 from puncturing the bag filter 19.

[0042] In some embodiments, since the retaining ring 16 is located at the end of the driving rod 17, when the telescopic power member 27 drives the base plate 18 to swing rapidly and violently, the retaining ring 16 at the end of the driving rod 17 will generate a large kinetic energy, causing the retaining ring 16 to violently impact the external bag-shaped filter screen 19. However, if the retaining ring 16 is fixed to the partition plate 14, the driving rod 17 and the base plate 18 will be fixedly connected and unable to swing. Therefore, a universal ball 15 is movably arranged inside the air hole, and a ventilation hole is provided through the universal ball 15. One end of the ventilation hole faces the air nozzle, and the other end of the ventilation hole is fixedly connected to the retaining ring 16. After the universal ball 15 is fixedly connected to the retaining ring 16, the retaining ring 16 swings at multiple angles, which will drive the universal ball 15 to rotate. Due to the arrangement of the retaining ring 16, the retaining ring 16 will create an obstruction between itself and the wall of the air hole, and the universal ball 15 will not rotate too far, causing the ventilation hole to excessively leave the air blowing range of the upper air nozzle. Furthermore, since the retaining ring 16 is fixedly connected to the ball joint 15, it will no longer collide with the bag filter 19, thus protecting the bag filter 19 and simultaneously achieving...

[0043] In some embodiments, the rotation angle of the omnidirectional ball 15 must ensure that the ventilation hole does not fall out of the air blowing coverage angle of the air nozzle. When the telescopic power component 27 causes the bag filter 19 to shake violently, the air nozzle can blow air into the ventilation hole of the omnidirectional 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 support 4 is provided below the housing 1 and around the collection hopper 2. The support 4 can stably raise the housing 1, thereby facilitating the arrangement of the collection hopper 2 and the pipes connected to the ash discharge gate.

[0045] In some embodiments, an inspection port is provided on the side of the housing 1 away from the collection hopper 2, and a top cover 6 is detachably and fixedly provided on the housing 1 opposite the inspection port. The inspection port allows staff to easily observe and inspect the interior of the housing 1, and the top cover 6 can cover the inspection port, forming a sealed environment under normal operation of the housing 1 to ensure that the filtered gas is not recontaminated.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A power plant flue gas purification and treatment device, characterized in that, Includes a box body, with a collection hopper connected to the bottom of the box body, an air inlet provided on the side wall of the box body near the collection hopper, an air outlet provided on the side wall of the box body away from the collection hopper, and an ash discharge valve connected to the side of the collection hopper away from the box body. A bracket is slidably mounted inside the box along the vertical axis of the ash discharge port, near the collection hopper. A partition plate is mounted inside the box parallel to the bracket, near the bottom of the air outlet. The partition plate has multiple air blowing holes. The bracket has ventilation intervals for gas passage. A bag-shaped filter screen is mounted on the partition plate facing the bracket, corresponding to each air blowing hole. The bag-shaped filter screen is movably connected to the bracket. An air jet dust removal assembly is mounted above the bag-shaped filter screen. The air jet dust removal assembly includes several air nozzles that correspond one-to-one with the air blowing holes to allow gas to be introduced into each bag-shaped filter screen. An auxiliary dust removal assembly is connected to the bracket to control the sliding movement of the bracket inside the box.

2. The power plant flue gas purification and treatment device as described in claim 1, characterized in that, The air blowing holes are arranged in an array of multiple holes, and the bag-shaped filter screens are arranged in the same array corresponding to the positions of the air blowing holes.

3. The power plant flue gas purification and treatment device as described in claim 2, characterized in that, The jet assembly includes multiple first pipes disposed above the partition plate. Each first pipe is correspondingly disposed above several air holes, and the air nozzle is connected to the side of the first pipe facing the air holes. The multiple first pipes are connected to each other through multiple second pipes. One end of any first pipe extends out of the side wall of the housing and is connected to a pipe connector. The free end of the pipe connector is connected to a gas cylinder. An electromagnetic pulse valve for controlling the opening or closing of the gas cylinder is disposed at the opening position of the gas cylinder.

4. The power plant flue gas purification and treatment device as described in claim 1, characterized in that, The auxiliary dust removal component includes a telescopic power component fixedly installed on the outer side wall of the housing at the position corresponding to the bracket. The output end of the telescopic power component passes through the side wall of the housing and is fixedly connected to a connecting plate. Multiple connecting rods are fixedly connected to the end of the connecting plate facing the bracket. Multiple supports are provided on the bracket and are fixedly connected to the connecting rods one by one.

5. The power plant flue gas purification and treatment device as described in claim 4, characterized in that, The bracket is equipped with a swing assembly that drives the bagged filter screen to swing at multiple angles. The swing assembly includes a lower connecting seat that is fixedly connected to the bracket. A double ball-head rod is movably connected to the lower connecting seat. An upper connecting seat is movably connected to the other end of the double ball-head rod. A bottom plate is fixedly connected to the side of the upper connecting plate away from the bracket. The bagged filter screen is fixedly connected to the bottom plate at the end facing the bracket.

6. The power plant flue gas purification and treatment device as described in claim 5, characterized in that, The bottom plate has multiple driving rods arranged vertically and symmetrically on the side facing the partition plate. The driving rods are located inside the bag-shaped filter screen. The multiple driving rods are fixedly connected to the same fixing ring on the side facing the partition plate. The fixing ring is movably connected to the partition plate.

7. The power plant flue gas purification and treatment device as described in claim 6, characterized in that, A universal ball is movably disposed inside the air blowing hole, and a ventilation hole is disposed through the universal ball. One end of the ventilation hole is disposed facing the air blowing nozzle, and the other end of the ventilation hole is fixedly connected to the fixing ring.

8. The power plant flue gas purification and treatment device as described in claim 7, characterized in that, The rotation angle of the omnidirectional ball must ensure that the ventilation hole does not detach from the air nozzle and cover the air blowing angle.

9. The power plant flue gas purification and treatment device as described in claim 1, characterized in that, A support frame is installed below the box and around the collection hopper.

10. The power plant flue gas purification and treatment device as described in claim 1, characterized in that, An inspection port is provided on the side of the box away from the collection hopper, and a top cover is detachably and fixedly provided on the box facing the inspection port.

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