Sealing device for slag inlet of boiler slag cooler

Abstract

The utility model relates to the field of boiler slag coolers, in particular to a slag inlet sealing device of a boiler slag cooler. The sealing device for the slag inlet of the boiler slag cooler comprises a slag cooler barrel and a slag inlet pipe, an extension pipe is arranged at the slag inlet of the slag cooler barrel, a movable ring is welded to one end of the extension pipe, the slag cooler barrel and the slag inlet are coaxially arranged, the slag inlet pipe is connected to the slag inlet of the slag cooler barrel in an inserted mode, the end of the slag inlet pipe extends into the slag cooler barrel by 300 mm, and the movable ring is welded to one end of the extension pipe. A static ring is welded to one end of the slag inlet pipe, a radial gap of 20-30 mm is kept between the outer wall of the static ring and the inner wall of the extension pipe, and a gap of 50 mm is reserved between the lower portion of the static ring and the inner wall of the extension pipe to serve as a backflow port. According to the slag inlet sealing device of the boiler slag cooler, due to the design of the labyrinth type sealing structure, the slag leakage phenomenon is effectively prevented, stable operation of the slag cooler is guaranteed, the movable ring and the static ring are arranged, a proper gap is reserved, friction between iron and iron is avoided, and abrasion of the sealing ring and the slag sealing disc is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the field of boiler slag coolers, in particular to a slag inlet sealing device of a boiler slag cooler. Background Art

[0002] The original design of the slag inlet of our factory's boiler slag cooler consists of a slag dropping pipe, a slag dropping bucket, a slag inlet pan seat, an adjustment ring, a sealing ring, and a slag sealing pan. The slag sealing pan is filled with thermal insulation cotton for sealing. The design itself has defects. During operation, the thermal insulation cotton is worn out and lost, resulting in sealing relying solely on the friction between the sealing ring and the iron of the slag sealing pan. Due to the iron-to-iron friction, the sealing ring and the slag sealing pan are severely worn. During operation, slag leakage occurs due to poor sealing. By adjusting the pull rod bolt to change the friction force, the slag sealing pan is severely worn within a month, and slag leakage occurs frequently at the slag inlet. In severe cases, the cylinder welds will be worn and water will leak, resulting in the slag cooler being unable to operate normally. At the same time, frequent slag leakage leads to a poor environment around the slag cooler. The team members have to clean up the accumulated slag every shift, which increases the labor intensity of the team members.

[0003] Therefore, it is necessary to provide a new boiler slag cooler slag inlet sealing device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a slag inlet sealing device for a boiler slag cooler.

[0005] The utility model provides a sealing device for the slag inlet of a boiler slag cooler, comprising: a slag cooler barrel and a slag inlet pipe. An extension pipe is provided at the slag inlet of the slag cooler barrel, one end of the extension pipe is welded with a dynamic ring, the slag cooler barrel and the slag inlet are coaxially arranged, the slag inlet of the slag cooler barrel is plugged with the slag inlet pipe, and the end of the slag inlet pipe extends 300mm into the interior of the slag cooler barrel, a static ring is welded with one end of the slag inlet pipe, a radial gap of 20-30mm is maintained between the outer wall of the static ring and the inner wall of the extension pipe, and a gap of 50mm is retained between the lower part of the static ring and the inner wall of the extension pipe as a reflux port.

[0006] Preferably, an axial gap of 10 mm is maintained between the dynamic ring and the static ring, thereby forming a labyrinth sealing structure.

[0007] Preferably, the extension tube is a 525mm seamless tube, and the length of the extension tube is 100mm.

[0008] Preferably, the static ring is a 10 mm thick steel plate.

[0009] Preferably, a slag inlet is provided at one end of the slag inlet pipe.

[0010] Preferably, both the dynamic ring and the static ring are made of high wear-resistant alloy steel.

[0011] Compared with the related art, the sealing device for the slag inlet of the boiler slag cooler provided by the present invention has the following beneficial effects:

[0012] Effectively solve the slag leakage problem: The design of the labyrinth sealing structure effectively prevents the occurrence of slag leakage and ensures the stable operation of the slag cooler.

[0013] Reduce wear: Setting dynamic and static rings and maintaining appropriate gaps avoids iron-to-iron friction and significantly reduces wear on sealing rings and slag sealing plates.

[0014] Optimized slag flow: The reflux hole design at the bottom of the static ring ensures that the accumulated slag at the bottom can smoothly flow into the cylinder of the slag cooler, optimizing the slag flow path.

[0015] Reduce resistance: The original insulation cotton and high-temperature filler seal are removed, which reduces friction resistance and improves equipment efficiency.

[0016] Simplified structure: The new device has a simple structure, using only a few components such as the dynamic ring, static ring and cylinder extension seamless pipe, and the installation process is simple.

[0017] Improved environment: After the transformation, the environment around the slag cooler has been significantly improved, reducing the labor intensity and cleaning difficulty of the team members. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the sealing device for the slag inlet of a boiler slag cooler provided by the utility model;

[0019] Figure 2 for Figure 1 The structural diagram of the partial enlarged view is shown.

[0020] Numbers in the figure: 1, slag cooler cylinder; 2, extension pipe; 3, moving ring; 4, slag inlet pipe; 5, static ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0023] See also Figure 1-2A sealing device for the slag inlet of a boiler slag cooler, the sealing device for the slag inlet of a boiler slag cooler comprising: a slag cooler barrel 1 and a slag inlet pipe 4, an extension pipe 2 is provided at the slag inlet of the slag cooler barrel 1, one end of the extension pipe 2 is welded with a dynamic ring 3, the slag cooler barrel 1 and the slag inlet are coaxially arranged, the slag inlet of the slag cooler barrel 1 is plugged with the slag inlet pipe 4, and the end of the slag inlet pipe 4 extends 300mm into the interior of the slag cooler barrel 1, one end of the slag inlet pipe 4 is welded with a static ring 5, the outer wall of the static ring 5 is connected to the extension pipe 2. A radial gap of 20-30mm is maintained between the inner walls of the tubes 2, a gap of 50mm is retained between the lower part of the static ring 5 and the inner wall of the extension tube 2 as a reflux port, and an axial gap of 10mm is maintained between the dynamic ring 3 and the static ring 5 to form a labyrinth sealing structure. The extension tube 2 adopts a 525mm seamless tube, and the length of the extension tube 2 is 100mm. The static ring 5 is a 10mm thick steel plate. A slag inlet is provided at one end of the slag inlet pipe 4. The dynamic ring 3 and the static ring 5 are both made of high-wear-resistant alloy steel.

[0024] It should be noted that a slag inlet sealing device was fabricated based on a labyrinth seal structure and the operating principles of mechanical and oil seals. The existing slag sealing plate, adjustment ring, sealing ring, slag inlet plate seat, and adjustment bolts were all removed, retaining the slag drop pipe and slag hopper. The cylinder at the slag inlet was lengthened by 100mm (using 525mm seamless pipe). The slag drop pipe was also extended 300mm into the cylinder using wear-resistant pipe of the same diameter. A stationary ring 5 (common 10mm thick steel plate) was welded to the slag inlet pipe 4, maintaining a 20-30mm radial clearance with the extended cylinder. A 50mm clearance was maintained at the bottom, serving as a return port to ensure smooth slag flow into the cooler cylinder 1. The cylinder port was also lengthened, and a dynamic ring 3 was welded to its end, rotating with the cylinder. A 10mm axial clearance was maintained between the dynamic and static rings 5. The cooler cylinder 1 and the slag inlet were coaxially arranged to form a labyrinth seal. At present, our factory has completed the transformation of three slag coolers, and the operating effect is good. There is no more slag leakage, which ensures that the slag cooler will not stop operating due to slag leakage. At the same time, it reduces the labor intensity of the team members and improves the environment around the slag cooler.

[0025] The working principle of the sealing device for the slag inlet of the boiler slag cooler provided by the utility model is as follows:

[0026] Slag cooler cylinder 1: As the main component of the slag cooler, an extension pipe 2 is set at its slag inlet; the extension pipe is a 525mm seamless pipe with a length of 100mm to increase the depth of the slag inlet and the sealing effect;

[0027] Rotating ring 3: welded to one end of the extension tube 2, rotating with the slag cooler cylinder 1; the rotating ring is made of high-wear-resistant alloy steel to improve wear resistance and service life;

[0028] Slag inlet pipe 4: plugged into the slag inlet of the slag cooler cylinder 1 and extended 300mm into the cylinder; this design ensures that most of the slag can directly enter the cylinder, reducing the retention at the slag inlet;

[0029] Stationary ring 5: Welded to one end of the slag inlet pipe 4, it is also made of high-wear-resistant alloy steel. A radial gap of 20-30mm is maintained between the outer wall of the stationary ring and the inner wall of the extension pipe 2. A 50mm gap is reserved at the bottom as a return port to allow the accumulated slag to flow smoothly back into the cylinder.

[0030] Labyrinth sealing mechanism:

[0031] An axial clearance of 10 mm is maintained between the dynamic ring 3 and the static ring 5, forming a labyrinth seal. When the slag cooler is running, the dynamic ring rotates with the cylinder, while the static ring remains stationary. The clearance and shape between the two prevent slag from passing directly, thus achieving an effective sealing effect.

[0032] The labyrinth seal not only reduces direct contact and wear between iron and iron, but also increases the difficulty of slag passing through through complex path and gap settings, thereby improving the reliability and durability of the seal.

[0033] Slag flow and sealing effect:

[0034] When the slag enters the slag cooler through the slag inlet pipe 4, it first encounters the static ring 5. Due to the radial gap between the static ring and the extension pipe 2 and the design of the return port, most of the slag can smoothly enter the cylinder, while a small amount of slag that may be retained in the gap flows back into the cylinder through the return port.

[0035] The rotation of the dynamic ring 3 and the labyrinth seal structure further prevent the leakage of slag. Even if a small amount of slag tries to pass through the gap, it will be forced to change direction due to the complexity of the labyrinth structure and the rotation of the dynamic ring, and eventually return to the inside of the cylinder or be effectively blocked.

[0036] Reduce friction and wear:

[0037] The thermal insulation cotton and high-temperature packing seal in the original design are removed, reducing unnecessary friction resistance and wear sources; at the same time, the dynamic and static rings are made of high-wear-resistant alloy steel materials, which further improves the wear resistance and extends the service life of the sealing device.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sealing device for a slag inlet of a boiler slag cooler, characterized in that: include: A slag cooler barrel (1), an extension pipe (2) is provided at the slag inlet of the slag cooler barrel (1), a moving ring (3) is welded to one end of the extension pipe (2), and the slag cooler barrel (1) and the slag inlet are coaxially arranged; A slag inlet pipe (4) is connected to the slag inlet of the slag cooler barrel (1), and the end of the slag inlet pipe (4) extends 300 mm into the interior of the slag cooler barrel (1). A static ring (5) is welded to one end of the slag inlet pipe (4), and a radial gap of 20-30 mm is maintained between the outer wall of the static ring (5) and the inner wall of the extension pipe (2). A gap of 50 mm is retained between the lower part of the static ring (5) and the inner wall of the extension pipe (2) as a reflux port.

2. The sealing device for the slag inlet of a boiler slag cooler according to claim 1, characterized in that: An axial gap of 10 mm is maintained between the dynamic ring (3) and the static ring (5), thereby forming a labyrinth seal structure.

3. The sealing device for the slag inlet of a boiler slag cooler according to claim 1, characterized in that: The extension pipe (2) is a 525 mm seamless pipe, and the length of the extension pipe (2) is 100 mm.

4. The sealing device for the slag inlet of a boiler slag cooler according to claim 1, characterized in that: The stationary ring (5) is a 10 mm thick steel plate.

5. The slag inlet sealing device of a boiler slag cooler according to claim 1, characterized in that: A slag inlet is provided at one end of the slag inlet pipe (4).

6. The sealing device for the slag inlet of a boiler slag cooler according to claim 1, characterized in that: The dynamic ring (3) and the static ring (5) are both made of high wear-resistant alloy steel.

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