A low-temperature economizer ash purging device

Abstract

This utility model relates to a low-temperature economizer ash purging device, belonging to the technical field of ash treatment for thermal power economizers. It includes an economizer body, with purging branch pipes rotatably mounted in an array at the upper part of the economizer body. Purging heads are fixedly mounted in an array at the lower end of the purging branch pipes. A main jet pipe is fixedly mounted on one side of the economizer body, with a connecting ring fixedly mounted at the lower end of the main jet pipe. One end of the purging branch pipe is rotatably mounted inside the connecting ring. A connecting frame is fixedly mounted on one side of the main jet pipe, with a toothed plate slidably engaged at the lower end of the connecting frame. The toothed plate meshes with one end of the purging branch pipe. The rotating purging branch pipe increases the purging coverage area. During purging, the reciprocating motion of the toothed plate causes the rubber column to create a pulling and inserting effect inside the purging branch pipe, alternately supplying air to the inside of the purging branch pipe, forming a pulse purging effect. This facilitates the removal of stubborn ash and is easy to use.

Description

Technical Field

[0001] This utility model relates to the field of ash treatment technology for economizers in thermal power plants, and in particular to a low-temperature economizer ash blowing device. Background Technology

[0002] Boiler flue gas heat loss is the largest component of boiler heat loss. To improve the thermal economy of power plants and achieve energy conservation and consumption reduction, it is essential to find ways to lower the flue gas temperature. Low-temperature economizers utilize flue gas preheating devices to reduce boiler flue gas temperature, lower coal consumption, and increase the unit's operational economy. Low-temperature economizers are installed downstream of the boiler outlet flue, operating at low temperatures. Simultaneously, the tube arrangement is relatively dense, and the flue gas contains a high amount of dust. Therefore, during operation, wear, low-temperature corrosion, and ash accumulation on the heat exchange tubes are common problems. Severe ash accumulation can lead to tube blockage, causing a significant increase in the differential pressure of the low-temperature economizer, thus affecting the safe and stable operation of the unit. Consequently, a purging device is needed to remove the dust adhering to the tubes. Currently, most methods use purgers to purge the tubes, but the purging position is directional and the purging intensity is uniform, resulting in poor coverage and the potential for dead zones or stubborn dust accumulation that cannot be removed. Utility Model Content

[0003] To overcome the technical defects of the existing technology, this utility model provides a low-temperature economizer ash purging device, which allows for flexible adjustment of the purging direction to form a purging effect and a pulse purging effect, thereby improving the purging coverage and the thoroughness of the purging.

[0004] The technical solution adopted by this utility model is: a low-temperature economizer ash purging device, including an economizer body, an ash collection hopper fixedly installed at the lower end of the economizer body, purging branch pipes rotatably mounted in an array at the upper end of the economizer body, purging heads fixedly mounted in an array at the lower end of the purging branch pipes, a main jet pipe fixedly installed on one side of the economizer body, a connecting ring fixedly installed at the lower end of the main jet pipe, one end of the purging branch pipe rotatably installed inside the connecting ring, and the purging branch pipe is connected to the main jet pipe through the connecting ring, a connecting frame fixedly installed on one side of the main jet pipe, and a toothed plate slidably engaged at the lower end of the connecting frame. The plate engages with one end of the purging branch pipe. In use, the economizer body is installed on the boiler outlet flue, and then the external high-pressure gas path is connected to the main injection pipe, so that the high-pressure gas enters the purging branch pipe through the connecting ring. During purging, the purging branch pipe swings back and forth, which in turn causes the purging head to swing, increasing the purging range and avoiding purging dead corners inside the economizer body. The accumulated ash from the purging process is blown into the ash collection hopper. When the purging branch pipe is rotated, the toothed plate moves back and forth on the connecting frame, causing the toothed plate to drive the purging branch pipe to swing back and forth, facilitating the purging operation inside the economizer body.

[0005] Preferably, one end of the purge branch pipe has through holes arranged in a circumferential array, and the through holes are located inside the connecting ring. The purge branch pipe is connected to the connecting ring through the through holes. Through the through holes, when the purge branch pipe swings, the main jet pipe and the purge branch pipe are stably connected.

[0006] Preferably, a T-shaped slide bar is fixedly installed on the upper end of the toothed plate, and the toothed plate is slidably engaged with the connecting frame through the slide bar, so that when the toothed plate moves, it swings along the direction of the connecting frame, which facilitates the swinging of the purging branch pipe.

[0007] Preferably, an electric telescopic rod is fixedly installed on one side of the upper end of the connecting frame. The telescopic end of the electric telescopic rod is fixedly connected to one end of the toothed plate. The electric telescopic rod drives the toothed plate to reciprocate on the connecting frame, which facilitates the driving of the purging branch pipe.

[0008] Preferably, a gear is fixedly installed on the outer side of one end of the purge branch pipe, and the gear meshes with the toothed plate. When the toothed plate reciprocates, the gear rotates alternately in the forward and reverse directions, thereby driving the purge branch pipe to swing.

[0009] Preferably, a rubber column is plugged into the inside of the purging branch pipe. The rubber column is located at the through hole. A connecting rod is fixedly installed at one end of the rubber column, and an L-shaped contact plate is fixedly installed at the other end of the connecting rod. The contact plate contacts one side of the toothed plate. When the toothed plate reciprocates, the toothed plate pushes the contact plate, causing the contact plate to alternately move away from the purging branch pipe. This facilitates the formation of a pulse purging effect in the purging branch pipe, making it easier to perform purging operations on the economizer body.

[0010] Preferably, a spring is fixedly installed at one end of the purging branch pipe, and the other end of the spring is fixedly connected to one side of the contact plate to facilitate the reset of the contact plate.

[0011] Preferably, wedge-shaped blocks are fixedly installed in an array on one side of the toothed plate, and the wedge-shaped blocks are installed alternately in opposite directions. One side of the contact plate has an inclined structure, and one end of the contact plate is in contact with the wedge-shaped blocks. By using the wedge-shaped blocks installed alternately in opposite directions, the purging branch pipes are alternately connected to the main injection pipe, which facilitates pulse purging of the interior of the economizer body.

[0012] The beneficial effects of this utility model are as follows: By using a rotating purge branch pipe, the purge head swings during the purge process, increasing the purge coverage area and reducing dead angles. Furthermore, through the rubber column, the reciprocating motion of the toothed plate during purge drives the wedge block to reciprocate, thereby creating a pulling and inserting effect inside the purge branch pipe. This alternating air supply to the inside of the purge branch pipe creates a pulse purge effect between the purge branch pipes, improving the purge effect on accumulated dust, making it easier to blow off stubborn accumulated dust, and facilitating its use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention after removing the main body of the economizer;

[0015] Figure 3 This utility model Figure 2 A magnified structural diagram of location A in the middle;

[0016] Figure 4 This is a structural schematic diagram of the location of the main jet pipe in this utility model;

[0017] Figure 5 This is a schematic diagram of the structure after the explosion at the location of the main jet pipe in this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Economizer body; 2. Ash hopper; 3. Purge branch pipe; 4. Purge head; 5. Main jet pipe; 6. Connecting ring; 7. Connecting frame; 8. Toothed plate; 9. Through hole; 10. Sliding bar; 11. Electric telescopic rod; 12. Gear; 13. Rubber column; 14. Connecting rod; 15. Contact plate; 16. Spring; 17. Wedge block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] like Figures 1-5 As shown, this embodiment provides a low-temperature economizer ash purging device, including an economizer body 1, an ash collection hopper 2 fixedly installed at the lower end of the economizer body 1, purging branch pipes 3 rotatably mounted in an array inside the upper end of the economizer body 1, purging heads 4 fixedly mounted in an array at the lower end of the purging branch pipes 3, a main jet pipe 5 fixedly installed on one side of the exterior of the economizer body 1, a connecting ring 6 fixedly installed at the lower end of the main jet pipe 5, one end of the purging branch pipe 3 rotatably installed inside the connecting ring 6, and the purging branch pipe 3 is connected to the main jet pipe 5 through the connecting ring 6, a connecting frame 7 fixedly installed on one side of the main jet pipe 5, and a toothed plate 8 slidably engaged at the lower end of the connecting frame 7, the toothed plate 8 and... One end of the purge branch pipe 3 is engaged. In use, the economizer body 1 is installed on the boiler outlet flue, and then the external high-pressure gas line is connected to the injection main pipe 5, so that the high-pressure gas enters the purge branch pipe 3 through the connecting ring 6. During purging, the purge branch pipe 3 is oscillating back and forth, which in turn causes the purge head 4 to oscillate, increasing the purging range and avoiding purging dead corners inside the economizer body 1. The accumulated ash from the purging process is blown into the ash collection hopper 2 for later processing. When the purge branch pipe 3 is rotated, the toothed plate 8 moves back and forth on the connecting frame 7, causing the toothed plate 8 to drive the purge branch pipe 3 to oscillate back and forth, which facilitates the purging operation inside the economizer body 1.

[0021] As a technical optimization solution of this utility model, specifically as follows: Figures 3-5As shown, one end of the purge branch pipe 3 has through holes 9 arranged in a circular array, and the through holes 9 are located inside the connecting ring 6. The purge branch pipe 3 is connected to the connecting ring 6 through the through holes 9. Through the through holes 9, when the purge branch pipe 3 swings, the main jet pipe 5 and the purge branch pipe 3 are stably connected, improving the purging effect. A T-shaped slide bar 10 is fixedly installed on the upper end of the toothed plate 8. The toothed plate 8 is slidably engaged with the connecting frame 7 through the slide bar 10. When the toothed plate 8 moves, it swings along the direction of the connecting frame 7, which facilitates the swinging of the purge branch pipe 3. An electric telescopic rod 11 is fixedly installed on one side of the upper end of the connecting frame 7. The telescopic end of the electric telescopic rod 11 is fixedly connected to one end of the toothed plate 8. When the telescopic end of the electric telescopic rod 11 reciprocates, it drives the toothed plate 8 to reciprocate on the connecting frame 7, which facilitates the driving of the purge branch pipe 3. A gear 12 is fixedly installed on the outer side of one end of the purge branch pipe 3, and the gear 12 meshes with the toothed plate 8. When the toothed plate 8 reciprocates, the gear 12 rotates alternately in the forward and reverse directions, thereby driving the purge branch pipe 3 to swing.

[0022] As a technical optimization solution of this utility model, specifically as follows: Figure 5 As shown, a rubber column 13 is plugged inside the purge branch pipe 3. The rubber column 13 is located at the through hole 9. A connecting rod 14 is fixedly installed at one end of the rubber column 13, and an L-shaped contact plate 15 is fixedly installed at the other end of the connecting rod 14. The contact plate 15 contacts one side of the toothed plate 8. When the toothed plate 8 reciprocates, it pushes the contact plate 15, causing the contact plate 15 to alternately move away from the purge branch pipe 3. When the contact plate 15 moves away from the purge branch pipe 3, the connecting rod 14 causes the rubber column 13 to move towards the outside of the purge branch pipe 3, releasing the blockage of the through hole 9 and connecting the main jet pipe 5 to the purge branch pipe 3. When the contact plate 15 approaches the purge branch pipe 3, the rubber column 13 blocks the through hole 9, and the main jet pipe 5 and the purge branch pipe 3 are not connected. This facilitates the formation of a pulse purging effect in the purging branch pipe 3, making it easier to purge the economizer body 1. A spring 16 is fixedly installed at one end of the purging branch pipe 3, and the other end of the spring 16 is fixedly connected to one side of the contact plate 15. The spring 16 facilitates the reset of the contact plate 15. Wedge blocks 17 are fixedly installed in an array on one side of the toothed plate 8, and the wedge blocks 17 are installed alternately in opposite directions. One side of the contact plate 15 has a sloping structure, and one end of the contact plate 15 contacts the wedge blocks 17. Through the alternately installed wedge blocks 17, when the wedge blocks 17 move back and forth with the toothed plate 8, the wedge blocks 17 push the contact plate 15, so that the purging branch pipe 3 is alternately connected to the main injection pipe 5, which facilitates pulse purging of the interior of the economizer body 1.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A low-temperature economizer ash deposition blowing device, comprising an economizer main body (1), a dust hopper (2) is fixedly installed at the lower end of the economizer main body (1), characterized in that: The upper part of the economizer body (1) is equipped with a purge branch pipe (3) arranged in an array. The lower end of the purge branch pipe (3) is fixedly equipped with a purge head (4) arranged in an array. The outer side of the economizer body (1) is fixedly equipped with a main injection pipe (5). The lower end of the main injection pipe (5) is fixedly equipped with a connecting ring (6). One end of the purge branch pipe (3) is rotatably installed inside the connecting ring (6). The purge branch pipe (3) is connected to the main injection pipe (5) through the connecting ring (6). A connecting frame (7) is fixedly installed on one side of the main injection pipe (5). The lower end of the connecting frame (7) is slidably engaged with a toothed plate (8). The toothed plate (8) meshes with one end of the purge branch pipe (3).

2. The low-temperature economizer ash purging device according to claim 1, characterized in that: One end of the purge branch pipe (3) is provided with through holes (9) arranged in a circular array, and the through holes (9) are located inside the connecting ring (6). The purge branch pipe (3) is connected to the connecting ring (6) through the through holes (9).

3. The low-temperature economizer ash purging device according to claim 1, characterized in that: The upper end of the toothed plate (8) is fixedly installed with a T-shaped slide bar (10), and the toothed plate (8) is slidably engaged with the connecting frame (7) through the slide bar (10).

4. The low-temperature economizer ash purging device according to claim 1, characterized in that: An electric telescopic rod (11) is fixedly installed on one side of the upper end of the connecting frame (7), and the telescopic end of the electric telescopic rod (11) is fixedly connected to one end of the toothed plate (8).

5. The low-temperature economizer ash purging device according to claim 1, characterized in that: A gear (12) is fixedly installed on the outer side of one end of the purge branch pipe (3), and the gear (12) meshes with the toothed plate (8).

6. The low-temperature economizer ash purging device according to claim 2, characterized in that: A rubber column (13) is plugged inside the purge branch pipe (3). The rubber column (13) is located at the position of the through hole (9). A connecting rod (14) is fixedly installed at one end of the rubber column (13), and an L-shaped contact plate (15) is fixedly installed at the other end of the connecting rod (14). The contact plate (15) is in contact with one side of the toothed plate (8).

7. The low-temperature economizer ash purging device according to claim 6, characterized in that: A spring (16) is fixedly installed at one end of the purge branch pipe (3), and the other end of the spring (16) is fixedly connected to one side of the contact plate (15).

8. The low-temperature economizer ash purging device according to claim 7, characterized in that: One side of the toothed plate (8) is fixedly mounted with wedge blocks (17) in an array, and the wedge blocks (17) are installed alternately in opposite directions. One side of the contact plate (15) has a sloping structure, and one end of the contact plate (15) is in contact with the wedge blocks (17).

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