Environment-friendly fly ash pretreatment device for thermal power plant

Abstract

The invention relates to the technical field of fly ash storage, and discloses an environment-friendly fly ash pretreatment device for a thermal power plant. The feeding component and the discharging component are respectively communicated with the top and the bottom of the storage tank; the air outlet assembly comprises a lower air outlet pipe communicating with the top of the storage tank, a sealing plate and an upper air outlet pipe, the sealing plate and the upper air outlet pipe are sequentially arranged above the lower air outlet pipe, the sealing plate is rotationally connected to the top of the storage tank, and a plurality of filter plates distributed circumferentially at intervals are distributed on the sealing plate; and by rotating the sealing plate, the filter plate can be clamped between the lower air outlet pipe and the upper air outlet pipe or the blocking can be realized between the lower air outlet pipe and the upper air outlet pipe. By rotating the sealing plate, the filter plate is erected between the lower air outlet pipe and the upper air outlet pipe, the lower air outlet pipe can exhaust air, and at the moment, the device is suitable for the process of filling the coal ash into the storage tank. And the sealing plate is rotated again, so that the lower air outlet pipe and the upper air outlet pipe are blocked, the effect of blocking the lower air outlet pipe can be achieved, and at the moment, the device is suitable for the storage process of the coal ash.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash storage, in particular to an environmentally friendly fly ash pretreatment device for a thermal power plant. Background Art

[0002] With the development of the electric power industry, the amount of fly ash discharged during coal combustion has increased year by year and has become one of the largest industrial waste residues in my country. It is particularly important to develop an efficient and environmentally friendly fly ash pretreatment device.

[0003] The patent with publication number CN117755861A discloses an environmentally friendly fly ash pretreatment device for thermal power plants. The patent utilizes two sets of first filter plates and second filter plates that are aligned and staggered, which greatly reduces the filtering burden of the semicircular filter screen and solves the problem of poor filtering effect and environmental pollution during the exhaust process; after the collection operation is completed, the sealing cover can be driven by a motor to close and the storage tank can be sealed to extend the storage time of the fly ash; the motor can also synchronously drive the first filter plate and the second filter plate to vibrate, as well as knock on the semicircular filter screen, and clean the fly ash attached to the surface of the filter screen and the filter plate to ensure the filtering capacity of the filter screen and the filter plate; and a downward airflow can be generated during the descent of the sealing cover, further improving the cleaning effect of the semicircular filter screen.

[0004] However, the above patent still has certain limitations during use. The first filter plate, the second filter plate and the semicircular filter screen are always installed on the square tube, and the fly ash attached to the surface is cleaned by vibration and knocking, which has limited cleaning process of fly ash. This means that in some cases, it may not be possible to completely remove all attached dust, resulting in a gradual decline in filtering effect. Summary of the invention

[0005] The present invention aims to provide an environmentally friendly fly ash pretreatment device for a thermal power plant to overcome the above-mentioned shortcomings.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: an environmentally friendly fly ash pretreatment device for a thermal power plant, comprising:

[0007] Storage tanks;

[0008] A feed assembly and a discharge assembly connected to the top and bottom of the storage tank respectively; and

[0009] The air outlet assembly includes a lower air outlet pipe connected to the top of the storage tank, a closed plate and an upper air outlet pipe arranged in sequence above the lower air outlet pipe, the closed plate is rotatably connected to the top of the storage tank, and is provided with a plurality of filter plates distributed at circumferential intervals. Rotating the closed plate can sandwich the filter plate between the lower air outlet pipe and the upper air outlet pipe or achieve blocking.

[0010] Preferably, a gear box is installed on the top of the storage tank, the upper end of the lower air outlet duct and the lower end of the upper air outlet duct are respectively connected to the gear box, and the sealed plate is rotatably connected in the gear box. A driving assembly is provided in the gear box, and the driving assembly is used to drive the sealed plate to rotate intermittently.

[0011] Preferably, the drive assembly comprises:

[0012] A rotating shaft rotatably connected to the gear box, a sealing plate and a second intermittent gear being coaxially fixedly connected to the rotating shaft; and

[0013] A driving motor is installed on the gear box, and the output shaft key of the driving motor is connected with the first intermittent gear. The first intermittent gear and the second intermittent gear are meshed, and the transmission ratio of the first intermittent gear and the second intermittent gear is greater than.

[0014] Preferably, a plurality of stepped holes are arranged on the sealed plate, a filter plate and an upper pressure ring are embedded in the large holes of the stepped holes, the upper pressure ring is detachably connected to the sealed plate, and the stepped holes, the filter plate and the upper pressure ring are detachably connected one by one.

[0015] Preferably, there are N filter plates, the angle between the N filter plates is 360 / N+, and the transmission ratio of the first intermittent gear and the second intermittent gear is N, where N is a positive integer greater than.

[0016] Preferably, the surface of the first intermittent gear is provided with first intermittent teeth and an arc convex surface, and the surface of the second intermittent gear is provided with N second intermittent teeth and N arc concave surfaces, the second intermittent teeth and the first intermittent teeth are selectively meshed, and the arc convex surface is slidably connected with the arc concave surface.

[0017] Preferably, a blind groove is provided at the end surface of the large hole of the stepped hole, a sealing ring is embedded in the blind groove, and the sealing ring is interference fit with the filter plate.

[0018] Preferably, the driving motor is a stepping motor or a servo motor, and the gear box is detachably connected with an end cover.

[0019] Preferably, a pressure gauge is installed on the storage tank, a dust cover is installed on the top of the upper air outlet pipe, and a support frame is installed at the lower end of the storage tank.

[0020] Preferably, the discharge assembly comprises:

[0021] a discharge pipe connected to the bottom of the storage tank; and

[0022] Valve installed on the discharge pipe.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] By rotating the sealing plate, a filter plate is installed between the lower air outlet pipe and the upper air outlet pipe, so that the lower air outlet pipe can be exhausted, which is suitable for the process of adding fly ash to the storage tank. The sealing plate is rotated again to block the lower air outlet pipe and the upper air outlet pipe, which can achieve the effect of blocking the lower air outlet pipe, which is suitable for the storage process of fly ash.

[0025] By rotating the sealing plate, the filter plate can be moved away from the lower outlet pipe and the upper outlet pipe, and the filter plate can be disassembled or cleaned at this time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic diagram of the overall structure of an environmentally friendly fly ash pretreatment device for a thermal power plant according to the present invention;

[0028] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A area;

[0029] Figure 3 It is a schematic diagram of the assembly of the drive assembly, the sealing plate, the upper air outlet duct and the lower air outlet duct;

[0030] Figure 4 The exploded view of the sealing plate, sealing ring, filter plate and upper pressing plate of the present invention.

[0031] Figure numerals: 1. storage tank; 2. feed assembly; 3. discharge pipe; 4. valve; 5. lower air outlet duct; 6. sealing plate; 7. upper air outlet duct; 8. filter plate; 9. gear box; 10. rotating shaft; 11. second intermittent gear; 12. first intermittent gear; 13. driving motor; 14. stepped hole; 15. upper pressure ring; 16. blind groove; 17. sealing ring; 18. end cover; 19. pressure gauge; 20. dust cover; 21. support frame. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-4 The present invention provides an environmentally friendly fly ash pretreatment device for a thermal power plant, which aims to improve the storage and treatment efficiency of fly ash and reduce environmental pollution. The device includes a storage tank 1, a feed assembly 2, a discharge assembly and an air outlet assembly.

[0035] The storage tank 1 is the main storage container for fly ash. Its top and bottom are connected to the feed assembly 2 and the discharge assembly respectively to ensure the smooth entry and exit of fly ash. The feed assembly 2 is located at the top of the storage tank 1 and is responsible for inputting fly ash into the storage tank 1; the discharge assembly is located at the bottom of the storage tank 1 and discharges the treated fly ash through the discharge pipe 3. The discharge pipe 3 is equipped with a valve 4 to control the discharge of fly ash. The air outlet assembly includes a lower air outlet pipe 5, a closed plate 6, an upper air outlet pipe 7 and a filter plate 8. The lower air outlet pipe 5 is connected to the top of the storage tank 1 and is used to discharge dust-containing gas; the closed plate 6 is rotatably connected to the top of the storage tank 1 and is provided with a plurality of filter plates 8 distributed at circumferential intervals. These filter plates 8 are used to intercept dust; rotating the closed plate 6 can sandwich the filter plate 8 between the lower air outlet pipe 5 and the upper air outlet pipe 7 or block it, thereby effectively controlling the discharge of dust.

[0036] By rotating the sealing plate 6, a filter plate 8 is installed between the lower air outlet pipe 5 and the upper air outlet pipe 7, so that the lower air outlet pipe 5 can be exhausted, which is suitable for the process of adding fly ash to the storage tank 1. The sealing plate 6 is rotated again to block the lower air outlet pipe 5 and the upper air outlet pipe 7, which can achieve the effect of blocking the lower air outlet pipe 5, which is suitable for the storage process of fly ash.

[0037] By rotating the sealing plate 6 , the filter plate 8 can be moved away from the lower outlet pipe and the upper outlet pipe 7 , and the filter plate 8 can be disassembled or cleaned at this time.

[0038] In order to realize the intermittent rotation of the sealed plate 6, a gear box 9 is installed on the top of the storage tank 1. The upper end of the lower air outlet pipe 5 and the lower end of the upper air outlet pipe 7 are respectively connected to the gear box 9. The driving assembly includes a rotating shaft 10, a second intermittent gear 11 and a driving motor 13 installed on the gear box 9. The rotating shaft 10 is coaxially fixedly connected with the sealed plate 6 and the second intermittent gear 11, and the output shaft of the driving motor 13 is keyed to the first intermittent gear 12. The first intermittent gear 12 and the second intermittent gear 11 are meshed, and the transmission ratio is greater than 1 to ensure the accurate rotation of the sealed plate 6.

[0039] The sealing plate 6 is provided with a plurality of stepped holes 14, and a filter plate 8 and an upper pressure ring 15 are embedded in the large hole of each stepped hole 14, and the upper pressure ring 15 is detachably connected to the sealing plate 6. This design ensures the sealing performance and facilitates the replacement and maintenance of the filter plate 8. There are N filter plates 8, and the angle between the N filter plates 8 is 360 / N+1, and the transmission ratio of the first intermittent gear 12 and the second intermittent gear 11 is N (N is a positive integer greater than 1). Such a configuration ensures the filtering effect and rotation accuracy.

[0040] In order to further improve the performance and stability of the device, the following details are optimized: the surface of the first intermittent gear 12 is provided with first intermittent teeth and a circular arc convex surface, and the surface of the second intermittent gear 11 is provided with N second intermittent teeth and N circular arc concave surfaces. This design allows the second intermittent teeth to selectively mesh with the first intermittent teeth, while the circular arc convex surface and the circular arc concave surface are slidably connected, thereby reducing wear and improving the stability of rotation.

[0041] A blind groove 16 is provided at the end surface of the large hole of the stepped hole 14 , and a sealing ring 17 is embedded in the blind groove 16 . The sealing ring 17 is interference fit with the filter plate 8 , which further enhances the sealing effect.

[0042] The driving motor 13 is selected from stepper motors or servo motors, and both motors can provide accurate control and stable power output. Simultaneously, the gearbox 9 is detachably connected with an end cap 18, which is convenient for maintenance and overhaul.

[0043] A pressure gauge 19 is installed on the storage tank 1 for real-time monitoring of the pressure inside the tank; a dust cover 20 is installed at the top of the upper air outlet pipe 7 to prevent external impurities from entering; a support frame 21 is installed at the lower end of the storage tank 1 to ensure the stability of the entire device.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An environmentally friendly fly ash pretreatment device for a thermal power plant, characterized in that: include: Storage tank (1); A feed assembly (2) and a discharge assembly respectively connected to the top and bottom of the storage tank (1); as well as An air outlet assembly, the air outlet assembly comprising a lower air outlet pipe (5) connected to the top of the storage tank (1), a sealing plate (6) and an upper air outlet pipe (7) arranged in sequence above the lower air outlet pipe (5), the sealing plate (6) being rotatably connected to the top of the storage tank (1) and provided with a plurality of filter plates (8) distributed at circumferential intervals, and the sealing plate (6) being rotated so that the filter plate (8) can be sandwiched between the lower air outlet pipe (5) and the upper air outlet pipe (7) or blocked.

2. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 1, characterized in that: A gear box (9) is installed on the top of the storage tank (1); the upper end of the lower air outlet pipe (5) and the lower end of the upper air outlet pipe (7) are respectively connected to the gear box (9); and the sealed plate (6) is rotatably connected in the gear box (9); a driving component is arranged in the gear box (9), and the driving component is used to drive the sealed plate (6) to rotate intermittently.

3. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 2, characterized in that: The drive assembly comprises: A rotating shaft (10) rotatably connected to the gear box (9), a sealing plate (6) and a second intermittent gear (11) being coaxially fixedly connected to the rotating shaft (10); and A drive motor (13) is mounted on the gear box (9), wherein the output shaft of the drive motor (13) is keyed to a first intermittent gear (12), the first intermittent gear (12) is meshed with a second intermittent gear (11), and a transmission ratio between the first intermittent gear (12) and the second intermittent gear (11) is greater than 1.

4. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 3, characterized in that: The sealing plate (6) is provided with a plurality of stepped holes (14), the filter plate (8) and the upper pressure ring (15) are embedded in the large holes of the stepped holes (14), the upper pressure ring (15) is detachably connected to the sealing plate (6), and the stepped holes (14), the filter plate (8) and the upper pressure ring (15) are detachably connected in a one-to-one correspondence.

5. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 4, characterized in that: The filter plates (8) are provided in N numbers, the angle between the N filter plates (8) is 360 / (N+1), and the transmission ratio between the first intermittent gear (12) and the second intermittent gear (11) is N (wherein N is a positive integer greater than 1).

6. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 5, characterized in that: The surface of the first intermittent gear (12) is provided with first intermittent teeth and an arc convex surface, and the surface of the second intermittent gear (11) is provided with N second intermittent teeth and N arc concave surfaces, the second intermittent teeth and the first intermittent teeth are selectively meshed, and the arc convex surface is slidably connected with the arc concave surface.

7. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 6, characterized in that: A blind groove (16) is provided at the end surface of the large hole of the stepped hole (14), a sealing ring (17) is embedded in the blind groove (16), and the sealing ring (17) is interference-fitted with the filter plate (8).

8. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 6, characterized in that: The driving motor (13) is a stepping motor or a servo motor, and the gear box (9) is detachably connected to an end cover (18).

9. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 6, characterized in that: A pressure gauge (19) is installed on the storage tank (1), a dust cover (20) is installed on the top end of the upper air outlet pipe (7), and a support frame (21) is installed on the lower end of the storage tank (1).

10. The environmentally friendly fly ash pretreatment device for thermal power plants according to claim 6, characterized in that: The discharge assembly comprises: a discharge pipe (3) connected to the bottom of the storage tank (1); and A valve (4) is installed on the discharge pipe (3).

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