Anti-blocking conveying device for dry ash removal system of thermal power plant

Abstract

The invention discloses a thermal power plant dry ash removal system anti-blocking conveying device which comprises a cloth bag dust removal device, the cloth bag dust removal device is composed of a filter bag dust collection mechanism, a pulse injection mechanism and a dust removal fan mechanism, the cloth bag dust removal device further comprises a support and a dust gas inlet, and the dust gas inlet is fixedly installed on the filter bag dust collection mechanism; the support is fixedly connected with the filter bag dust collecting mechanism, the discharging device is arranged below the filter bag dust collecting mechanism, the dust airflow conveying device is arranged below the discharging device, and the anti-blocking device is arranged on the dust airflow conveying device. The dust airflow conveying device comprises a high-pressure fan; the miniature pressure sensor monitors the air pressure of the pipeline in real time, accurately recognizes the blockage risk and triggers the dredging action, and blockage expansion is avoided; the corner loosening structure can actively move to the blocking position, lump dust is directionally removed through the loosening piece rotating at a high speed, the dredging efficiency is obviously improved compared with a traditional manual mode, the problem of system shutdown caused by pipeline blocking is thoroughly solved, and the continuity of dust removal operation is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection equipment of thermal power plants, and particularly relates to a dry ash removal system anti-blocking conveying device for thermal power plants. BACKGROUND

[0002] In the dry ash removal system of a thermal power plant, the traditional ash removal conveying has the following key problems: dust is easy to deposit and block in the pipeline, which causes the pipeline to be blocked, affecting the continuous operation of the system; after being blocked, manual dredging is required, which is labor-intensive, low in operation efficiency, and has safety hazards; the existing anti-blocking device is mostly passive cleaning, lacks precise detection and active dredging linkage, and has limited anti-blocking effect, so a dry ash removal system anti-blocking conveying device for thermal power plants is proposed. SUMMARY

[0003] To solve the problems of easy blocking of the pipeline, low dredging efficiency and poor anti-blocking effect in the dry ash removal system of a thermal power plant, the present application provides a dry ash removal system anti-blocking conveying device for thermal power plants.

[0004] The present application specifically adopts the following technical solutions to achieve the above-mentioned purposes: A dry ash removal system anti-blocking conveying device for thermal power plants, comprising a bag-type dust collector, wherein the bag-type dust collector is composed of a filter bag dust collecting mechanism, a pulse blowing mechanism and a dust removal fan mechanism; the bag-type dust collector further comprises a support and a dust gas inlet; the dust gas inlet is fixedly installed on the filter bag dust collecting mechanism; the support is fixedly connected with the filter bag dust collecting mechanism; a discharging device is arranged below the filter bag dust collecting mechanism; a dust gas flow conveying device is arranged below the discharging device; and an anti-blocking device is arranged on the dust gas flow conveying device. The dust gas flow conveying device comprises a high-pressure fan, a collecting box, a pumping pipe and a collecting pipe; the high-pressure fan is fixedly connected with the collecting box through a pipeline; the pumping pipe is fixedly connected with the collecting pipe; and the pumping pipe is fixedly connected with the collecting box. The anti-blocking device comprises a first driving motor, a corner loosening structure and an end fixed disc; a screw rod is fixedly installed on the first driving motor; a moving disc is threadedly installed on the screw rod; the corner loosening structure is arranged on the moving disc; the corner loosening structure and the end fixed disc are both installed in the pumping pipe; and a micro pressure sensor is fixedly installed on the end fixed disc.

[0005] Preferably, the upper end of the collecting box is fixedly connected with the discharging device; the side, away from the high-pressure fan, of the collecting box is fixedly connected with the pumping pipe; and a lower arc plate is fixedly installed in the collecting box.

[0006] Preferably, the collecting pipe is fixedly installed in the middle section of the pumping pipe, and the collecting pipe is communicated with the pumping pipe; a plurality of arc-shaped blocking rings are fixedly installed in the pumping pipe on the side of the collecting pipe close to the collecting box.

[0007] Preferably, the first driving motor is fixedly installed at one end of the pumping pipe away from the collecting tank, the lead screw is fixedly connected with the output shaft of the first driving motor, the lead screw is rotatably installed in the pumping pipe, the end fixing disc is fixedly installed in the pumping pipe and located at the side of the collecting pipe away from the collecting tank, and the end of the lead screw away from the first driving motor is rotatably installed on the end fixing disc through a bearing.

[0008] Preferably, the micro pressure sensor is fixedly installed on the side of the moving disc close to the collecting tank, and the micro pressure sensor is electrically connected with the external master controller.

[0009] Preferably, a limiting rod is fixedly installed in the pumping pipe, the limiting rod is symmetrically installed on both sides of the lead screw, the limiting rod penetrates the moving disc, the moving disc is threadedly connected with the lead screw, and the moving disc is slidably matched with the limiting rod.

[0010] Preferably, the edge corner loosening structure comprises a second driving motor, the second driving motor is fixedly installed on the moving disc, a rotating shaft is fixedly installed on the output shaft of the second driving motor, an end plug is fixedly installed at the end of the rotating shaft away from the second driving motor, and a plurality of loosening pieces are fixedly installed on the rotating shaft in a distributed manner.

[0011] Preferably, a first notch is formed in the arc-shaped blocking ring, and a first through hole is formed in the end fixing disc, the diameter of the first through hole is equal to the diameter of the end plug.

[0012] Preferably, the unloading device comprises a third driving motor and a roller, the roller is rotatably installed at the lower part of the filter bag dust collecting mechanism, the third driving motor is fixedly installed on one side of the filter bag dust collecting mechanism, the output shaft of the third driving motor is fixedly connected with the roller, and a plurality of partitions are fixedly installed on the roller in a circumferential distributed manner.

[0013] The application has the following beneficial effects: (1) The micro pressure sensor can monitor the pipeline wind pressure in real time, accurately identify the risk of blockage and trigger the dredging action, and avoid the expansion of blockage; the edge corner loosening structure can be actively moved to the blocked position, and the loosening pieces rotating at high speed can be used to directionally disperse the dust agglomerates, so that the dredging efficiency is obviously improved compared with the traditional manual method, the problem of system shutdown caused by pipeline blockage is completely solved, and the continuity of dust removal operation is ensured.

[0014] (2) The integrated dust removal, unloading, conveying and anti-blocking four core functions do not need to be additionally configured with multiple independent devices, the system structure and operation process are simplified, the automation degree is high, manual unloading and dredging are not needed, the labor intensity and safety hazards of the operating personnel are reduced, the arc-shaped blocking ring can prevent dust deposition in advance, the blockage frequency is reduced, and the modular design of the vulnerable parts can greatly reduce the equipment maintenance cost and long-term operation loss.

[0015] (Three) the discharging device pushes dust evenly through the partition, avoids the accumulation of the discharging port; the lower arc plate of the collecting box guides dust to converge, the high-pressure fan provides stable airflow, ensures smooth dust conveying; the active dredging design of the anti-blocking device avoids excessive dust clumping, reduces dust loss and pipeline wear during conveying, while ensuring efficient dust collection and improving the overall operation efficiency and practicality of the dust removal system. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of the present application; Figure 2 is an enlarged structure schematic diagram of part A of the present application Figure 1 Figure 3 is a sectional structure schematic diagram of the present application; Figure 4 is an enlarged structure schematic diagram of part B of the present application Figure 3 Figure 5 is a three-dimensional structure schematic diagram of the dust airflow conveying device and the anti-blocking device and other structures of the present application; Figure 6 is a sectional structure schematic diagram of the dust airflow conveying device and the anti-blocking device and other structures of the present application; Figure 7 is a three-dimensional structure schematic diagram of the anti-blocking device of the present application; Figure 8 is a structure schematic diagram of the arc-shaped blocking ring and the end fixed disc and other structures of the present application.

[0017] Reference signs: 1, cloth bag dust removal device; 2, dust airflow conveying device; 3, anti-blocking device; 4, discharging device; 10, filter bag dust collecting mechanism; 11, dust gas inlet; 12, pulse blowing mechanism; 13, dust removal fan mechanism; 14, support; 20, high-pressure fan; 21, collecting box; 22, lower arc plate; 23, pumping pipe; 24, arc-shaped blocking ring; 25, first slot; 26, collecting pipe; 30, first drive motor; 31, lead screw; 32, limit rod; 33, moving disc; 34, corner loosening structure; 35, end fixed disc; 36, micro pressure sensor; 37, first through hole; 340, second drive motor; 341, rotating shaft; 342, end plug; 343, loosening piece; 40, third drive motor; 41, roller; 42, partition. DETAILED DESCRIPTION

[0018] ​​In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0020] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0021] The electrical components appearing in the text are all electrically connected with the master controller and 220V mains, and the master controller can be a conventional known device such as a computer.

[0022] In the description of the embodiments of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer", "upper", etc. are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the product of the present application is used, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application.

[0023] Embodiment: Reference Figures 1-8 A fire power plant dry ash removal system anti-blocking conveying device, comprising a bag dust removal device 1, the bag dust removal device 1 is composed of a filter bag dust collecting mechanism 10, a pulse blowing mechanism 12 and a dust removal fan mechanism 13, the bag dust removal device 1 further comprises a support 14 and a dust gas inlet 11, the dust gas inlet 11 is fixedly installed on the filter bag dust collecting mechanism 10, the support 14 is fixedly connected with the filter bag dust collecting mechanism 10, a discharging device 4 is arranged below the filter bag dust collecting mechanism 10, a dust gas flow conveying device 2 is arranged below the discharging device 4, and an anti-blocking device 3 is arranged on the dust gas flow conveying device 2. The dust gas flow conveying device 2 comprises a high-pressure fan 20, a collecting box 21, a pumping pipe 23 and a collecting pipe 26, the high-pressure fan 20 is fixedly connected with the collecting box 21 through a pipeline, the pumping pipe 23 is fixedly connected with the collecting pipe 26, and the pumping pipe 23 is fixedly connected with the collecting box 21. The anti-blocking device 3 comprises a first driving motor 30, a corner loosening structure 34 and an end fixed disc 35. The first driving motor 30 is fixedly installed on a screw rod 31, and the screw rod 31 is threadedly installed on a moving disc 33. The corner loosening structure 34 is arranged on the moving disc 33. The corner loosening structure 34 and the end fixed disc 35 are both installed in the pumping pipe 23. The end fixed disc 35 is fixedly installed with a micro pressure sensor 36.

[0024] The upper end of the collecting box 21 is fixedly connected with the discharging device 4. The side, away from the high-pressure fan 20, of the collecting box 21 is fixedly connected with the pumping pipe 23. The collecting box 21 is fixedly installed with a lower arc plate 22. A collecting pipe 26 is fixedly installed in the middle section of the pumping pipe 23 and communicates with the pumping pipe 23. A plurality of arc-shaped blocking rings 24 are fixedly installed in the pumping pipe 23 on the side, close to the collecting box 21, of the collecting pipe 26. The first driving motor 30 is fixedly installed on the side, away from the collecting box 21, of the pumping pipe 23. The screw rod 31 is fixedly connected with the output shaft of the first driving motor 30 and is rotatably installed in the pumping pipe 23. The end fixed disc 35 is fixedly installed in the pumping pipe 23 and is located on the side, away from the collecting box 21, of the connecting position of the collecting pipe 26 and the pumping pipe 23. The end, away from the first driving motor 30, of the screw rod 31 is rotatably installed on the end fixed disc 35 through a bearing. The micro pressure sensor 36 is fixedly installed on the side, close to the collecting box 21, of the moving disc 33 and is electrically connected with an external main controller. A limiting rod 32 is fixedly installed in the pumping pipe 23 and is symmetrically installed on both sides of the screw rod 31. The limiting rod 32 penetrates through the moving disc 33. The moving disc 33 is threadedly connected with the screw rod 31 and is slidably matched with the limiting rod 32. The corner loosening structure 34 comprises a second driving motor 340 fixedly installed on the moving disc 33. A rotating shaft 341 is fixedly installed on the output shaft of the second driving motor 340. An end plug 342 is fixedly installed on the end, away from the second driving motor 340, of the rotating shaft 341. A plurality of loosening pieces 343 are distributedly fixedly installed on the rotating shaft 341. The arc-shaped blocking ring 24 is provided with a first slot 25. The end fixed disc 35 is provided with a first through hole 37. The diameter of the first through hole 37 is equal to the diameter of the end plug 342. The discharging device 4 comprises a third driving motor 40 and a roller 41. The roller 41 is rotatably installed on the lower part of the filter bag dust collecting mechanism 10. The third driving motor 40 is fixedly installed on one side of the filter bag dust collecting mechanism 10. The output shaft of the third driving motor 40 is fixedly connected with the roller 41. A plurality of partition plates 42 are distributedly fixedly installed on the circumference of the roller 41.

[0025] Working principle: Before the device starts, the equipment inspection and parameter calibration need to be completed: confirm that the filter bag of the filter bag dust collecting mechanism 10 is intact without damage, the dust removal fan mechanism 13, each driving motor 30, 340, 40 and high pressure fan 20 are normally connected, the micro pressure sensor 36 is stably connected with the external main controller signal; the initial wind pressure threshold of the micro pressure sensor 36 is calibrated to ensure that it can accurately feedback the wind pressure change in the dust gas conveying device 2. Then start the system, the main controller controls each mechanism to enter standby state, ready to receive dust-containing gas flow.

[0026] The dust-containing gas flow is connected through the dust gas inlet 11 on the filter bag dust collecting mechanism 10 and enters the inside of the filter bag dust collecting mechanism 10. At this time, the dust removal fan mechanism 13 starts to generate negative pressure, under the action of negative pressure, the dust in the dust-containing gas flow is intercepted and adsorbed on the surface of the filter bag, and the cleaned air after filtration is discharged through the dust removal fan mechanism 13, completing the preliminary dust removal work.

[0027] With the passage of time, the dust adsorbed on the surface of the filter bag gradually accumulates, affecting the dust removal efficiency. At this time, the pulse blowing mechanism 12 starts according to the preset period or trigger signal, outputs high pressure pulse airflow, and reversely impacts the surface of the filter bag to shake off the adsorbed dust. The shaken dust falls to the lower part of the filter bag dust collecting mechanism 10 and accumulates above the unloading device 4, waiting for conveying.

[0028] The unloading device 4 starts, the third driving motor 40 outputs power to drive the roller 41 to rotate, and the fixed baffle 42 distributed on the circumference of the roller 41 rotates synchronously, which pushes the accumulated dust through the baffle 42 to be uniformly and continuously conveyed to the collection box 21 of the dust gas conveying device 2. The lower arc plate 22 in the collection box 21 can guide the dust to converge in the direction of the pumping pipe 23, avoiding the accumulation of dust in the collection box 21.

[0029] Then the high pressure fan 20 starts to generate strong airflow and convey it to the collection box 21 through the pipeline. Under the action of airflow, the dust in the collection box 21 is blown into the pumping pipe 23. When the dust flows in the pumping pipe 23 to the connection with the collection pipe 26, part of the dust enters the collection pipe 26 under the guidance of the airflow and is conveyed to the external subsidence type collection box for storage; the remaining dust continues to flow along the pumping pipe 23, and the plurality of arc-shaped blocking rings 24 fixedly installed in the pumping pipe 23 can block the dust from depositing on the pipe wall, avoiding the formation of blockage hidden danger caused by local accumulation, and at the same time, the first slot 25 on the arc-shaped blocking ring 24 reserves a movable channel for the rotating shaft 341 and the loose piece 343 of the subsequent anti-blocking device, ensuring that the components can smoothly pass through during the anti-blocking operation.

[0030] During operation, the miniature pressure sensor 36 on the mobile disk 33 monitors the air pressure in the pumping pipe 23 in real time and transmits the monitoring data to the external main controller. When dust clumps and clogs the pumping pipe 23, the airflow is obstructed, and the air pressure value detected by the miniature pressure sensor 36 will be lower than the preset threshold. The main controller will immediately determine that the pipe is blocked and activate the anti-blocking device 3.

[0031] After the anti-blocking device 3 is activated, the first drive motor 30 outputs power to drive the lead screw 31 to rotate. Since the moving disc 33 is threadedly connected to the lead screw 31 and can only slide axially under the guidance of the limit rods 32 on both sides, when the lead screw 31 rotates, it drives the moving disc 33 to move into the pumping pipe 23 at the blockage position, that is, the pumping pipe 26 near the collection box 21. During the movement, the rotating shaft 341 and the loosening plate 343 pass smoothly through the first slot 25 on the arc-shaped retaining ring 24, avoiding obstruction.

[0032] When the moving disc 33 drives the corner loosening structure 34 to the blockage position, the second drive motor 340 starts, driving the rotating shaft 341 and several loosening plates 343 fixed on the shaft to rotate at high speed. During the rotation of the loosening plates 343, they continuously agitate the outer ring of the blocked dust clumps, breaking up and loosening the clumps of dust, restoring them to a fluid state. At this time, the high-pressure blower 20 continuously provides airflow, and the loosened dust continues to be transported along the pumping pipe 23 or into the collection pipe 26 under the push of the airflow, completing the pipe unblocking.

[0033] After the blockage is cleared, the wind pressure detected by the miniature pressure sensor 36 returns to the normal range. The main controller stops the second drive motor 340 from rotating and simultaneously reverses the first drive motor 30, causing the moving disc 33 and the corner loosening structure 34 to return to their initial positions. The rotating shaft 341 and the loosening piece 343 pass through the first slot 25 and the arc-shaped retaining ring 24 again. The anti-blocking device 3 returns to standby mode, and the device continues to perform dust removal and conveying operations normally. Throughout the process, the end fixing disc 35 serves to block dust and protect the internal structure of the anti-blocking device. Its first through hole 37 is matched with the diameter of the end plug 342, ensuring smooth movement of the moving disc 33 without affecting the pipe sealing performance.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A material conveying device for preventing blockage in a dry ash removal system of a thermal power plant, comprising a bag filter dust collector (1), wherein the bag filter dust collector (1) is composed of a filter bag dust collection mechanism (10), a pulse jet cleaning mechanism (12), and a dust removal fan mechanism (13), and the bag filter dust collector (1) further comprises a support (14) and a dust inlet (11), the dust inlet (11) being fixedly installed on the filter bag dust collection mechanism (10), and the support (14) being fixedly connected to the filter bag dust collection mechanism (10), characterized in that: The filter bag dust collection mechanism (10) is provided with a discharge device (4) below it, and a dust airflow conveying device (2) is provided below the discharge device (4). An anti-blocking device (3) is provided on the dust airflow conveying device (2). The dust airflow conveying device (2) includes a high-pressure blower (20), a collection box (21), a pumping pipe (23) and a collection pipe (26). The high-pressure blower (20) is fixedly connected to the collection box (21) through a pipeline. The pumping pipe (23) is fixedly connected to the collection pipe (26). The pumping pipe (23) is fixedly connected to the collection box (21). The anti-blocking device (3) includes a first drive motor (30), a corner loosening structure (34), and an end fixing plate (35). A lead screw (31) is fixedly installed on the first drive motor (30), and a movable plate (33) is threaded on the lead screw (31). The corner loosening structure (34) is set on the movable plate (33). The corner loosening structure (34) and the end fixing plate (35) are both installed in the pumping pipe (23). A miniature pressure sensor (36) is fixedly installed on the end fixing plate (35).

2. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 1, characterized in that, The upper end of the collection box (21) is fixedly connected to the unloading device (4), and the side of the collection box (21) away from the high-pressure blower (20) is fixedly connected to the pumping pipe (23). A lower arc plate (22) is fixedly installed inside the collection box (21).

3. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 2, characterized in that, The collection pipe (26) is fixedly installed in the middle section of the pumping pipe (23), and the collection pipe (26) is connected to the pumping pipe (23). Several arc-shaped retaining rings (24) are fixedly installed inside the pumping pipe (23) on the side of the collection pipe (26) near the collection box (21).

4. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 1, characterized in that, The first drive motor (30) is fixedly installed at the end of the pumping pipe (23) away from the collection box (21). The lead screw (31) is fixedly connected to the output shaft of the first drive motor (30). The lead screw (31) is rotatably installed inside the pumping pipe (23). The end fixing plate (35) is fixedly installed inside the pumping pipe (23) and the end fixing plate (35) is located on the side away from the collection box (21) at the connection between the collection pipe (26) and the pumping pipe (23). The end of the lead screw (31) away from the first drive motor (30) is rotatably installed on the end fixing plate (35) through a bearing.

5. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 4, characterized in that, The miniature pressure sensor (36) is fixedly installed on the side of the mobile disk (33) near the collection box (21), and the miniature pressure sensor (36) is electrically connected to the external main controller.

6. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 5, characterized in that, A limiting rod (32) is fixedly installed inside the pumping pipe (23). The limiting rod (32) is symmetrically installed on both sides of the lead screw (31). The limiting rod (32) passes through the moving disc (33). The moving disc (33) is threadedly connected to the lead screw (31). The moving disc (33) and the limiting rod (32) are in sliding cooperation.

7. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 1, characterized in that, The corner loosening structure (34) includes a second drive motor (340), which is fixedly mounted on the movable disk (33). A rotating shaft (341) is fixedly mounted on the output shaft of the second drive motor (340). An end plug (342) is fixedly mounted on the end of the rotating shaft (341) away from the second drive motor (340). Several loosening pieces (343) are distributed and fixedly mounted on the rotating shaft (341).

8. The anti-clogging material conveying device for a dry ash removal system in a thermal power plant according to claim 7, characterized in that, The arc-shaped retaining ring (24) has a first slot (25), and the end fixing plate (35) has a first through hole (37). The diameter of the first through hole (37) is equal to the diameter of the end plug (342).

9. A material conveying device for preventing blockage in a dry ash removal system of a thermal power plant according to claim 6, characterized in that, The unloading device (4) includes a third drive motor (40) and a roller (41). The roller (41) is rotatably installed on the lower part of the filter bag dust collection mechanism (10). The third drive motor (40) is fixedly installed on one side of the filter bag dust collection mechanism (10). The output shaft of the third drive motor (40) is fixedly connected to the roller (41). A partition plate (42) is fixedly installed on the roller (41) in a circumferentially distributed manner.

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