A new boiler furnace bottom water seal mechanical seal structure

Abstract

The application provides a novel mechanical seal structure of a boiler bottom water seal, which comprises a water cooling wall, a slag baffle is arranged at the lower part of the water cooling wall, a mechanical seal mechanism is arranged at one side of the slag baffle, a water seal groove reconstruction base is arranged at the bottom surface of the mechanical seal mechanism, a buffer layer is arranged at one side of the water seal groove reconstruction base, and the water seal groove reconstruction base and the buffer layer are arranged at the upper part of a slag well. The application adopts a novel mechanical seal technology of a boiler bottom water seal, cancels the original designed sealing water system, saves a large amount of fresh water resources, solves the problems of the boiler bottom seal, reduces the boiler efficiency, eliminates the stubborn problem of ash water leakage and equipment pollution caused by the deformation of the inner and outer protection plates, and completely cures the stubborn problem of the longitudinal expansion limitation of the water cooling wall of the boiler body.

Description

Technical Field

[0001] This invention relates to the field of large boiler equipment technology, specifically to a novel water seal mechanical seal structure for the boiler furnace bottom. Background Technology

[0002] Traditional thermal power plant ash removal systems employ wet ash removal machines, with ash wells positioned above the machines. These wells are sealed to the boiler bottom using water-sealed baffles. As ash accumulates in the water-sealed trough, its height gradually increases, with measurements showing an average depth of 400-500 mm. This causes the inner and outer baffles of the water-sealed trough to deform and tilt, leading to leakage and affecting the boiler bottom seal, thus reducing boiler efficiency. More seriously, the continuous accumulation of ash in the water-sealed trough directly impacts the longitudinal expansion of the boiler's water-cooled walls, threatening the safe operation of the boiler. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a novel water seal mechanical seal structure for the boiler furnace bottom. The purpose is to solve the technical problem mentioned in the background art, which is that ash accumulation in the water seal groove causes the inner and outer baffles of the water seal groove to be squeezed, deformed, and tilted, and even affects the longitudinal expansion of the boiler body's water-cooled wall.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a novel water-sealed mechanical seal structure for boiler bottom, comprising a water-cooled wall, a slag curtain at the lower part of the water-cooled wall, a mechanical seal mechanism on one side of the slag curtain, a water seal groove modified base on the bottom surface of the mechanical seal mechanism, a buffer layer on one side of the water seal groove modified base, and both the water seal groove modified base and the buffer layer being located above the slag well.

[0005] Furthermore, the distance between the top surface of the modified base of the water seal trough and the bottom surface of the water-cooled wall is not less than 1200mm.

[0006] Furthermore, the slag baffle includes a baffle fixing plate, the upper end of which is fixedly connected to the bottom surface of the water-cooled wall. The lower part of the baffle fixing plate is provided with multiple movable hanging rings, the lower parts of which are all located at the upper end of the first baffle plate. The lower end of the first baffle plate is provided with multiple baffle hanging rings, the lower parts of which are all located at the upper end of the second baffle plate, the lower end of which are provided at the lower end of the second baffle plate, and the lower ends of which are all located at the upper end of the third baffle plate.

[0007] Furthermore, a first auxiliary baffle is provided on one side of the lower end of the curtain fixing plate.

[0008] Furthermore, a second auxiliary baffle is provided on the lower side of both the first baffle and the second baffle.

[0009] Furthermore, the lower end of the third curtain panel is provided with an inclined baffle.

[0010] Furthermore, the mechanical seal mechanism includes an upper sealing plate, the upper end of which is fixedly connected to the bottom surface of the water-cooled wall. The upper part of the upper sealing plate is provided with multiple elastic support units, the lower ends of which are all located at the lower part of the lower sealing plate. The lower end of the lower sealing plate is located at the top surface of the modified water seal groove base. One side of each of the multiple elastic support units is provided with a sealing heat insulation heat pipe. The upper end of the upper sealing plate is fixedly connected to the upper end of the sealing heat insulation outer sealing plate, and the lower end of the sealing heat insulation outer sealing plate is fixedly connected to the lower end of the lower sealing plate.

[0011] Furthermore, the elastic support unit includes an outer spring sheet, and an inner spring sheet is provided on the inner side of the outer spring sheet. The upper ends of the outer spring sheet and the inner spring sheet are both fixedly connected to the upper part of the upper sealing plate by rivets, and the lower ends of the outer spring sheet and the inner spring sheet are both fixedly connected to the lower part of the lower sealing plate by rivets.

[0012] Furthermore, the modified base of the water seal trough includes a channel steel, the bottom surface of which is fixedly connected to the top surface of the slag well. One side of the channel steel is provided with the original water seal trough shell, the upper end of which is provided with an I-beam, and one side of which is provided with an F-shaped support block. The lower end of the F-shaped support block is located inside the channel steel.

[0013] Furthermore, the buffer layer is made of rubber.

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

[0015] The new boiler bottom water seal mechanical seal technology eliminates the need for the original sealing water system, saving a significant amount of fresh water. It also solves the problem of bottom sealing, which reduces boiler efficiency and eliminates the persistent issue of ash and water leakage causing equipment contamination due to deformation of the inner and outer protective plates. Furthermore, it completely eradicates the problem of limited longitudinal expansion of the boiler body's water-cooled walls. This approach saves fresh water, improves boiler efficiency, and ensures safe boiler operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the front cross-section of the internal structure of the present invention;

[0018] Figure 3 This is schematic diagram A showing the internal structure of the present invention when opened;

[0019] Figure 4 This is schematic diagram B showing the internal structure of the present invention when opened;

[0020] Figure 5 This is a schematic diagram of the slag curtain structure of the present invention;

[0021] Figure 6 This is a side view schematic diagram of the slag curtain structure of the present invention;

[0022] Figure 7 This is a schematic diagram of the internal structure of the mechanical seal of the present invention when opened;

[0023] Figure 8 This is a schematic diagram of the elastic support unit structure of the present invention.

[0024] In the diagram: 1. Water-cooled wall; 2. Slag curtain; 21. Curtain fixing plate; 211. First auxiliary curtain; 22. Movable lifting ring; 23. First curtain plate; 231. Second auxiliary curtain; 24. Curtain lifting ring; 25. Second curtain plate; 26. Third curtain plate; 261. Inclined baffle; 3. Mechanical seal mechanism; 31. Upper sealing plate; 32. Elastic support unit; 321. Outer spring; 322. Inner spring; 33. Lower sealing plate; 34. Sealing insulation heat pack; 35. Sealing and heat insulation outer sealing plate; 4. Water seal trough modified base; 41. Channel steel; 42. Original water seal trough shell; 43. I-beam; 44. F-shaped support block; 5. Buffer layer; 6. Slag well. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please refer to the following examples. Figure 1-4A novel water-sealed mechanical seal structure for boiler furnace bottom includes a water-cooled wall 1, a slag curtain 2 at the lower part of the water-cooled wall 1, a mechanical seal mechanism 3 on one side of the slag curtain 2, a water seal groove modified base 4 on the bottom surface of the mechanical seal mechanism 3, a buffer layer 5 on one side of the water seal groove modified base 4, and both the water seal groove modified base 4 and the buffer layer 5 are located on the upper part of the slag well 6.

[0029] Please refer to the following examples. Figure 2 The distance between the top surface of the modified base 4 of the water seal trough and the bottom surface of the water-cooled wall 1 is not less than 1200mm. This design takes into account that after the boiler is in operation, the lower header may sink to a certain extent in the cold state compared with the original design elevation. Therefore, a 1200mm installation space is guaranteed for the mechanical seal.

[0030] Please refer to the following examples. Figure 5-6 The slag curtain 2 includes a curtain fixing plate 21. The upper end of the curtain fixing plate 21 is fixedly connected to the bottom surface of the water-cooled wall 1. The lower part of the curtain fixing plate 21 is provided with multiple movable hanging rings 22. The lower part of the multiple movable hanging rings 22 is provided at the upper end of the first curtain plate 23. The lower end of the first curtain plate 23 is provided with multiple curtain hanging rings 24. The lower part of the multiple curtain hanging rings 24 is provided at the upper end of the second curtain plate 25. The lower end of the second curtain plate 25 is provided with multiple curtain hanging rings 24. The lower end of the multiple curtain hanging rings 24 is provided at the upper end of the third curtain plate 26. The lower end of the curtain fixing plate 21 is provided with a first auxiliary baffle 211. The lower part of the first curtain plate 23 and the second curtain plate 25 are both provided with a second auxiliary baffle 231. The lower end of the third curtain plate 26 is provided with an inclined baffle strip 261. This design prevents slag from entering the mechanical seal mechanism 3 through the slag curtain 2.

[0031] Please refer to the following examples. Figure 7 The mechanical seal mechanism 3 includes an upper sealing plate 31, the upper end of which is fixedly connected to the bottom surface of the water-cooled wall 1. The upper part of the upper sealing plate 31 is provided with multiple elastic support units 32, the lower ends of which are all located at the lower part of the lower sealing plate 33. The lower end of the lower sealing plate 33 is located at the top surface of the water seal groove modification base 4. A sealing heat insulation tape 34 is provided on one side of the multiple elastic support units 32. The upper end of the upper sealing plate 31 is fixedly connected to the upper end of the sealing heat insulation outer sealing plate 35, and the lower end of the sealing heat insulation outer sealing plate 35 is fixedly connected to the lower end of the lower sealing plate 33. This design ensures that the water-cooled wall does not jam when it expands vertically through the installation and gap adjustment of the upper sealing plate 31 and the lower sealing plate 33. The sealing heat insulation tape 34 ensures that the internal temperature is 950 degrees Celsius and the external temperature does not exceed 50 degrees Celsius.

[0032] Please refer to the following examples. Figure 8 The elastic support unit 32 includes an outer spring sheet 321, and an inner spring sheet 322 is provided on the inner side of the outer spring sheet 321. The upper ends of the outer spring sheet 321 and the inner spring sheet 322 are fixedly connected to the upper part of the upper sealing plate 31 by rivets, and the lower ends of the outer spring sheet 321 and the inner spring sheet 322 are fixedly connected to the lower part of the lower sealing plate 33 by rivets. This design provides longitudinal support force to the mechanical seal mechanism 3 through the elastic support unit 32.

[0033] Please refer to the following examples. Figure 2 The modified base 4 of the water seal trough includes a channel steel 41. The bottom surface of the channel steel 41 is fixedly connected to the top surface of the slag well 6. The original water seal trough shell 42 is provided on one side of the channel steel 41. The upper end of the original water seal trough shell 42 is provided with an I-beam 43. An F-shaped support block 44 is provided on one side of the I-beam 43. The lower end of the F-shaped support block 44 is located inside the channel steel 41.

[0034] In this embodiment, the buffer layer 5 is made of rubber, which is designed to reduce the wear of slag on the slag well.

[0035] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A novel water-sealed mechanical seal structure for boiler furnace bottom, comprising a water-cooled wall (1), characterized in that: The lower part of the water-cooled wall (1) is provided with a slag curtain (2), and a mechanical sealing mechanism (3) is provided on one side of the slag curtain (2). A water seal groove modification base (4) is provided on the bottom surface of the mechanical sealing mechanism (3). A buffer layer (5) is provided on one side of the water seal groove modification base (4). The water seal groove modification base (4) and the buffer layer (5) are both located on the upper part of the slag well (6). The slag baffle (2) includes a baffle fixing plate (21). The upper end of the baffle fixing plate (21) is fixedly connected to the bottom surface of the water-cooled wall (1). The lower part of the baffle fixing plate (21) is provided with multiple movable hanging rings (22). The lower part of the multiple movable hanging rings (22) is provided at the upper end of the first baffle plate (23). The lower end of the first baffle plate (23) is provided with multiple baffle hanging rings (24). The lower part of the multiple baffle hanging rings (24) is provided at the upper end of the second baffle plate (25). The lower end of the second baffle plate (25) is provided with multiple baffle hanging rings (24). The lower end of the multiple baffle hanging rings (24) is provided at the upper end of the third baffle plate (26). The mechanical seal mechanism (3) includes an upper sealing plate (31), the upper end of which is fixedly connected to the bottom surface of the water-cooled wall (1). The upper part of the upper sealing plate (31) is provided with multiple elastic support units (32), the lower ends of the multiple elastic support units (32) are all located at the lower part of the lower sealing plate (33), the lower end of the lower sealing plate (33) is located at the top surface of the water seal groove modification base (4), a sealing heat insulation heat pack (34) is provided on one side of the multiple elastic support units (32), the upper end of the upper sealing plate (31) is fixedly connected to the upper end of the sealing heat insulation outer sealing plate (35), and the lower end of the sealing heat insulation outer sealing plate (35) is fixedly connected to the lower end of the lower sealing plate (33). The elastic support unit (32) includes an outer spring sheet (321), and an inner spring sheet (322) is provided on the inner side of the outer spring sheet (321). The upper ends of the outer spring sheet (321) and the inner spring sheet (322) are fixedly connected to the upper part of the upper sealing plate (31) by rivets, and the lower ends of the outer spring sheet (321) and the inner spring sheet (322) are fixedly connected to the lower part of the lower sealing plate (33) by rivets.

2. The novel water-sealed mechanical seal structure for boiler furnace bottom according to claim 1, characterized in that: The distance between the top surface of the modified base (4) of the water seal trough and the bottom surface of the water-cooled wall (1) is not less than 1200mm.

3. The novel boiler bottom water seal mechanical seal structure according to claim 1, characterized in that: The lower end of the curtain fixing plate (21) is provided with a first auxiliary baffle (211).

4. The novel boiler bottom water seal mechanical seal structure according to claim 1, characterized in that: A second auxiliary baffle (231) is provided on one side of the lower part of the first baffle (23) and the second baffle (25).

5. The novel boiler bottom water seal mechanical seal structure according to claim 1, characterized in that: The lower end of the third curtain panel (26) is provided with an inclined baffle (261).

6. The novel boiler bottom water seal mechanical seal structure according to claim 1, characterized in that: The modified base (4) of the water seal trough includes a channel steel (41). The bottom surface of the channel steel (41) is fixedly connected to the top surface of the slag well (6). The original water seal trough shell (42) is provided on one side of the channel steel (41). The upper end of the original water seal trough shell (42) is provided with an I-beam (43). An F-shaped support block (44) is provided on one side of the I-beam (43). The lower end of the F-shaped support block (44) is located inside the channel steel (41).

7. The novel boiler bottom water seal mechanical seal structure according to claim 1, characterized in that: The buffer layer (5) is made of rubber.

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