Hot-end fan plate ash removal pipeline

Abstract

The utility model provides a hot end fan plate ash removal pipeline, and belongs to the technical field of rotary air preheaters. The problem that dust is accumulated on the fan-shaped plate at the hot end due to the small dust suction and blowing range is solved. The dust removal device comprises dust removal boxes, an air inlet pipeline, a dust suction pipe and a dust blowing pipe, the dust removal boxes are arranged on one side of a hot end sector plate at intervals, the dust removal boxes comprise the dust blowing box and the dust suction box, the air inlet end of the dust blowing pipe is connected with the air inlet pipeline, the air outlet end of the dust blowing pipe is connected with the dust blowing box, the air inlet end of the dust suction pipe is connected with the dust suction box, and the air outlet end of the dust blowing pipe is connected with the dust blowing box. The air outlet end is communicated with the smoke side, soot blowing holes are formed in the bottom and the two sides of the soot blowing and removing box, and soot suction holes are formed in the bottom and the two sides of the soot suction and removing box. The cleaning device is mainly used for cleaning accumulated dust generated on the fan-shaped plate at the hot end of the rotary air preheater.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary air preheaters, in particular to a hot end fan plate dust removal pipeline. Background Art

[0002] The existing method for removing dust from the hot-end sector plates of rotary air preheaters uses positive-pressure primary air from the cold end of the preheater to purge the accumulated dust from the hot-end sector plates. Simultaneously, a dust collection duct is installed at the preheater inlet flue to remove the accumulated dust using negative pressure. Currently, the outlet area of ​​this duct is small, resulting in a limited suction and removal range. This inability to effectively cover the accumulated dust areas results in poor dust removal, leading to severe dust accumulation on the hot-end sector plates. This hinders adjustment of the hot-end sector plates, making it impossible to meet sealing gap requirements. This increases air leakage, deteriorates air preheater performance, and ultimately reduces boiler thermal efficiency. Utility Model Content

[0003] In view of this, the utility model aims to propose a hot end fan plate dust removal pipeline to solve the problem of dust accumulation on the hot end fan plate due to the small dust suction and dust blowing range.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a hot end fan plate dust removal duct, comprising an air inlet duct, a dust blowing device and a dust removal device, the dust blowing device and the dust suction device are spaced apart on one side of the hot end fan plate, the dust blowing device comprises a dust blowing and dust removal box and a dust blowing pipe, the air inlet end of the dust blowing pipe is connected to the air inlet duct, and the air outlet end is connected to the dust blowing and dust removal box, a plurality of dust blowing holes are provided on the dust blowing and dust removal box, the dust suction device comprises a dust suction and dust removal box and a dust suction pipe, the air inlet end of the dust suction and dust removal pipe is connected to the dust suction and dust removal box, and the air outlet end is connected to the flue gas side, and a plurality of dust suction holes are provided on the dust suction and dust removal box.

[0005] Furthermore, the plurality of soot blowing holes are arranged at equal intervals on the bottom and both sides of the soot blowing and removing box, and the plurality of soot suction holes are arranged at equal intervals on the bottom and both sides of the soot suction and removing box.

[0006] Furthermore, there are multiple soot blowing devices and multiple soot sucking devices, and multiple soot removing devices and multiple soot sucking devices are alternately arranged.

[0007] Furthermore, the hot end sector plate, ash removal box, ash suction pipe and ash blowing pipe are all fixed inside the air preheater through a truss.

[0008] Furthermore, the air inlet duct is fixed inside the air preheater via a duct bracket.

[0009] Furthermore, there are a plurality of hot end sector plates, and a static seal is formed between the hot end sector plates and the air preheater.

[0010] Furthermore, a stop valve is provided on the air inlet duct.

[0011] Furthermore, a gate valve is provided on the ash suction pipe.

[0012] Furthermore, the air inlet end of the ash suction pipe is connected to the ash suction and removal box through multiple air inlet pipes.

[0013] Furthermore, the air outlet end of the soot blowing pipe is connected to the soot blowing and removing box through multiple air outlet pipes.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model can remove dust more effectively by arranging a dust removal box at the bottom of the dust removal pipe;

[0016] 2. The utility model creates a high pressure difference by delivering high-pressure cold primary air in the air inlet duct, thereby cleaning the dust accumulated on the hot end fan-shaped plate;

[0017] 3. The utility model sets a gate valve on the ash removal pipeline, which can be opened or closed according to the degree of ash accumulation on the hot end sector plate;

[0018] 4. The utility model adopts the use of dust suction device and dust removal device in conjunction with each other. Both the dust suction device and the dust removal device are provided with a dust removal box. The dust removal box is provided with multiple air inlet and outlet openings, which can effectively expand the dust removal range and accurately cover the dust removal area.

[0019] 5. The utility model improves the dust removal effect of the hot end fan-shaped plate, reduces the burden of the hot end fan-shaped plate, and ensures that the adjustment range of the fan-shaped plate is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the connection structure of the hot end fan plate dust removal pipeline described in the utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at the middle BB;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0024] Figure 4 This is a partial side structural diagram of a soot blowing and soot removal box of a hot end fan plate soot removal pipeline according to the present invention;

[0025] Figure 5 This is a partial side structural schematic diagram of an ash suction and ash removal box of a hot end fan plate ash removal pipeline described in the present invention.

[0026] In the picture:

[0027] 1. Hot end fan plate; 2. Gate valve; 3. Soot blowing and ash removal box; 4. Soot suction and ash removal box; 5. Stop valve; 6. Pipe support; 7. Air inlet duct; 8. Soot suction pipe; 9. Soot blowing pipe. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0029] See also Figure 1-5 The present embodiment is described as follows: a hot end fan plate dust removal duct comprises an air inlet duct 7, a dust blowing device and a dust removal device. The dust blowing device and the dust suction device are arranged at intervals on one side of the hot end fan plate 1. The dust blowing device comprises a dust blowing and dust removal box 3 and a dust blowing pipe 9. The air inlet end of the dust blowing pipe 9 is connected to the air inlet duct 7, and the air outlet end is connected to the dust blowing and dust removal box 3. A plurality of dust blowing holes are provided on the dust blowing and dust removal box 3. By providing a plurality of dust blowing holes, the range of dust blowing is effectively expanded. The dust suction device includes a dust blowing and dust removal box 3. It includes an ash suction and removal box 4 and an ash suction pipe 8. The air inlet end of the ash suction and removal box 4 is connected to the air outlet end of the ash suction and removal box, and the air outlet end is connected to the flue gas side. The ash suction and removal box 4 is provided with a plurality of ash suction holes. By setting a plurality of ash suction holes, the range of ash suction is effectively expanded. The number of the ash blowing holes and the ash suction holes is determined according to the area of ​​the hot end fan plate 1. In this embodiment, there is an ash blowing hole on each side of the ash blowing and removal box 3, and five ash removal holes on the bottom. There is an ash suction hole on each side of the ash suction and removal box 4, and five ash removal holes on the bottom.

[0030] When it is necessary to clean the dust on the hot end sector plate 1, high-pressure cold primary air is injected into the air inlet duct 7. The high-pressure cold primary air passes through the soot blowing pipe 9 and the soot blowing and dust removal box 3 in turn. The high-pressure cold primary air blows up the dust on the hot end sector plate 1 through the soot blowing holes provided on the soot blowing and dust removal box 3, and at the same time generates a higher air pressure difference. The blown dust is then sucked into the soot suction and dust removal box 4 through the soot suction holes on the soot suction and dust removal box 4, and the dust is transported to the flue gas side through the soot suction pipe 8, and the dust is discharged through the flue gas side.

[0031] The plurality of soot blowing holes are arranged at equal intervals at the bottom and both sides of the soot blowing and dust removal box (3), and the plurality of soot suction holes are arranged at equal intervals at the bottom and both sides of the soot suction and dust removal box (4). By respectively arranging the soot blowing holes and the soot suction holes at the bottom and both sides of the soot blowing and dust removal box (3) and the soot suction and dust removal box (4), the range of soot blowing and dust suction is effectively expanded, thereby improving the dust removal efficiency.

[0032] There are several soot blowing devices and several soot sucking devices, and several soot removal devices and several soot sucking devices are arranged alternately. By alternately arranging several soot blowing devices and soot sucking devices, the range of soot removal is effectively expanded, and the problem of small soot sucking and soot blowing area in the prior art is solved. In this embodiment, two soot blowing devices and two soot sucking devices are set.

[0033] The hot end sector plate 1, the ash removal box, the ash suction pipe 8 and the ash blowing pipe 9 are all fixed inside the air preheater through a truss.

[0034] The air inlet duct 7 is fixed inside the air preheater via a duct bracket 6 .

[0035] There are a plurality of hot end sector plates 1, and a static seal is formed between the hot end sector plates 1 and the air preheater.

[0036] A stop valve 5 is provided on the air inlet duct 7, and the stop valve 5 is used to control the soot blowing operation. When the stop valve 5 is opened, the high-pressure cold primary air enters the soot blowing pipe 9 and the soot blowing and dust removal box 3 in sequence through the air inlet duct 7, and the dust is blown up through the soot blowing holes provided on the soot blowing and dust removal box 3. When the stop valve 5 is closed, the soot blowing operation is not performed.

[0037] A gate valve 2 is provided on the ash suction pipe 8, and the gate valve 2 is used to control the ash suction operation. When the gate valve 2 is opened, the ash suction and ash removal box 4 uses the pressure difference to transport the sucked dust through the gate valve 2 to the flue gas side. When the gate valve 2 is closed, the ash suction and ash removal box 4 does not work.

[0038] The air inlet end of the ash suction pipe (8) is connected to the ash suction and ash removal box (4) through multiple air inlet pipes. The number of the ash suction pipes 8 is set according to the area of ​​the hot end fan plate 1. In this embodiment, the number of the air inlet pipes is three.

[0039] The air outlet end of the soot blowing pipe (9) is connected to the soot blowing and dust removal box (3) through multiple air outlet pipes. The number of the soot blowing pipes 9 is set according to the area of ​​the hot end sector plate 1. In this embodiment, the number of the air outlet pipes is two.

[0040] The working principle of the utility model is as follows: when the hot end fan plate 1 needs to be cleaned of accumulated dust, the gate valve 2 is closed and the stop valve 5 is opened. The high-pressure cold primary air is sequentially transported to the soot blowing pipe 9 and the soot blowing and removing box 3 through the air inlet pipe 7. The high-pressure cold primary air is transported to the surface of the hot end fan plate 1 through a number of soot blowing holes arranged at the bottom and both sides of the soot blowing and removing box 3, so that the dust on the hot end fan plate 1 is blown up and a higher air pressure difference is generated at the same time. After the dust on the hot end fan plate 1 is completely blown up, the stop valve 5 is closed and the gate valve 2 is opened. The ash suction and removal box 4 utilizes the air pressure difference and sucks the dust into the inside of the ash suction and removal box 4 through a number of ash suction holes on both sides and the bottom, and then transports it to the flue gas side through the ash suction pipe 8. Finally, the dust is transported to the outside of the air preheater through the flue gas side.

[0041] The utility model blows away the dust accumulated on the hot end fan-shaped plates 1 on both sides of the static seal by inputting high-pressure cold primary air at the air inlet of the air inlet duct 7, thereby establishing a higher pressure difference, which is beneficial to improving the dust removal effect. A stop valve 5 is provided on the air inlet duct 7, and a gate valve 2 is provided at the outlet end of the dust suction pipe 8, which can be opened or closed according to the depth of the dust accumulation on site, and the dust accumulated on both sides of the static seal is transported by the negative pressure of the flue gas. There are several dust blowing holes on both sides and the bottom of the dust blowing and dust removal box 3, and there are several dust suction and dust removal boxes on both sides and the bottom of the dust suction and dust removal box 4. The ash suction holes expand the range of ash blowing and ash suction by setting up an ash removal box and setting air inlet and outlet openings at the bottom and both sides of the ash removal box, and can ensure accurate coverage of the ash removal area, effectively solving the problems of ash accumulation and low ash cleaning efficiency on the hot end fan plate 1 of the air preheater, and at the same time can reduce the burden on the hot end fan plate 1, so that the adjustment range of the hot end fan plate 1 will not be affected by ash accumulation, and can meet the requirements of the sealing gap of the air preheater, reduce the air leakage rate, and improve the performance of the air preheater, thereby effectively improving the thermal efficiency of the boiler.

[0042] The embodiments of the present invention disclosed above are intended only to illustrate the present invention. These embodiments do not exhaust all details, nor do they limit the present invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A hot end fan plate dust removal pipeline, characterized by: It comprises an air inlet duct (7), a soot blowing device and a soot removal device, wherein the soot blowing device and the soot suction device are arranged at intervals on one side of the hot end fan plate (1), the soot blowing device comprises a soot blowing and dust removal box (3) and a soot blowing pipe (9), the soot blowing pipe (9) has an air inlet end connected to the air inlet duct (7), and an air outlet end connected to the soot blowing and dust removal box (3), and the soot blowing and dust removal box (3) is provided with a plurality of soot blowing holes, the soot suction device comprises a dust suction and dust removal box (4) and a dust suction pipe (8), the soot suction pipe (8) has an air inlet end connected to the dust suction and dust removal box (4), and an air outlet end communicated with the flue gas side, and the soot suction and dust removal box (4) is provided with a plurality of dust suction holes.

2. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: The plurality of soot blowing holes are arranged at equal intervals on the bottom and both sides of the soot blowing and soot removal box (3), and the plurality of soot suction holes are arranged at equal intervals on the bottom and both sides of the soot suction and soot removal box (4).

3. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: There are multiple soot blowing devices and multiple soot sucking devices, and the multiple soot blowing devices and multiple soot sucking devices are alternately arranged.

4. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: The hot end sector plate (1), the ash removal box, the ash suction pipe (8) and the ash blowing pipe (9) are all fixed inside the air preheater via a truss.

5. The hot end fan plate ash removal pipeline according to claim 4, characterized in that: The air inlet duct (7) is fixed inside the air preheater via a duct bracket (6).

6. The hot end fan plate ash removal pipeline according to claim 5, characterized in that: There are a plurality of hot end sector plates (1), and a static seal is formed between the hot end sector plates (1) and the air preheater.

7. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: A stop valve (5) is provided on the air inlet duct (7).

8. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: A gate valve (2) is provided on the ash suction pipe (8).

9. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: The air inlet end of the ash suction pipe (8) is connected to the ash suction and removal box (4) through multiple air inlet pipes.

10. The hot end fan plate ash removal pipeline according to claim 1, characterized in that: The air outlet end of the soot blowing pipe (9) is connected to the soot blowing and removing box (3) through multiple air outlet pipes.

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