CN219160411U

CN219160411U - Boiler bottom sealing device and boiler bottom structure

Info

Publication number: CN219160411U
Application number: CN202223553800.5U
Authority: CN
Inventors: 胡波; 胡庆权; 张华聪; 李建; 高立发; 周云; 李疆; 黄超生; 蒋长虹
Original assignee: Spic Chongqing Hechuan Power Generation Co ltd
Current assignee: Spic Chongqing Hechuan Power Generation Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-09
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a boiler bottom sealing device and a boiler bottom structure. The boiler bottom sealing device provided by the utility model has the advantages of avoiding water consumption, reducing cleaning of boiler ash and avoiding overflow of ash water.

Description

Boiler bottom sealing device and boiler bottom structure

Technical Field

The utility model relates to the technical field of boilers, in particular to a boiler bottom sealing device and a boiler bottom structure.

Background

At present, a water seal is often adopted to seal the furnace bottom of a boiler of a thermal power plant, and in long-term operation, boiler ash can be accumulated and deposited in the water seal tank, so that the deposited boiler ash in the water seal tank needs to be cleaned regularly. In addition, in operation, the ash water in the water seal tank is easy to overflow under the action of the internal pressure of the boiler, and the ash water overflows to the outside to influence civilized production.

In summary, the boiler bottom sealing measures in the related art have the problems of large water consumption, labor and time consumption for cleaning the furnace ash and outward overflow of ash water.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present utility model provide a boiler bottom sealing arrangement that has the advantages of avoiding water usage, reducing ash cleaning, and avoiding ash water overflow.

The embodiment of the utility model also provides a boiler bottom structure.

The boiler bottom sealing device comprises a first sealing plate and a second sealing plate, wherein the first sealing plate is connected with a water cooling wall of a boiler; the second sealing plate is connected with the slag hopper of the boiler and is positioned below the first sealing plate, and at least part of the second sealing plate and the first sealing plate are overlapped and are in sliding fit.

According to the sealing device for the boiler bottom, disclosed by the embodiment of the utility model, the sealing mode of the first sealing plate and the second sealing plate is adopted, so that no water flow is introduced, and water consumption is avoided. In addition, the boiler ash in the embodiment falls into the slag hopper and is transported downwards by the slag hopper, so that accumulation of the boiler ash is avoided, cleaning of the boiler ash is reduced, and labor and time are saved. In addition, in the embodiment, because the water seal furnace bottom is avoided, no ash water is generated, thereby solving the problem that the ash water overflows to the outside and ensuring civilized production.

In some embodiments, the boiler bottom sealing device further comprises a first ash baffle and a second ash baffle, the first ash baffle is connected with the water-cooled wall, the first sealing plate and the second sealing plate form a sealing assembly, and the first ash baffle is positioned on one side of the sealing assembly adjacent to the center of the boiler furnace; the second ash blocking plate is connected with the slag hopper and is positioned below the first ash blocking plate, the second ash blocking plate is positioned on one side, adjacent to the center of the hearth, of the sealing assembly, and at least part of the second ash blocking plate and at least part of the first ash blocking plate are vertically overlapped.

In some embodiments, the boiler bottom sealing device further comprises an insulating layer, the insulating layer is located on one side, away from the center of the hearth, of the sealing assembly, and two ends of the insulating layer are respectively connected with the water cooling wall and the slag hopper.

In some embodiments, the boiler bottom sealing device further comprises a skin, the skin is located on one side, away from the center of the hearth, of the heat insulation layer, and two ends of the skin are respectively connected with the water-cooled wall and the slag bucket.

In some embodiments, the cross-section of the skin is arcuate, protruding outside the firebox.

In some embodiments, the boiler bottom sealing device further comprises angle irons and a bottom plate, wherein the angle irons are installed at the bottom end of the water-cooled wall, and the first sealing plate, the heat insulation layer and the top end of the skin are all connected with the angle irons; the bottom plate install in the top of sediment fill, the second closing plate the heat preservation with the bottom of covering all with the bottom plate links to each other.

The boiler bottom structure according to the embodiment of the utility model comprises the boiler bottom sealing device according to the embodiment, the boiler bottom sealing device further comprises the hearth, the water-cooled wall and the slag hopper, the bottom end of the hearth forms a slag hole, and the boiler bottom sealing device is positioned below the hearth; the two water cooling walls are symmetrical in the radial direction of the hearth, the two water cooling walls are respectively arranged on two opposite peripheral walls of the hearth, the two boiler bottom sealing devices are in one-to-one correspondence with the water cooling walls, and the angle irons in the boiler bottom sealing devices are connected with the corresponding water cooling walls; the top of the slag hopper forms a slag inlet, the slag hopper is positioned below the hearth, the slag inlet is vertically opposite to the slag outlet, and the bottom plates in the two boiler bottom sealing devices are respectively arranged on two sides of the top of the slag hopper.

Thereby, two boiler bottom sealing means achieve a seal against both sides of the boiler bottom.

Other technical advantages of the boiler bottom structure according to the embodiment of the present utility model are the same as those of the boiler bottom sealing device of the above embodiment, and will not be described here again.

Drawings

FIG. 1 is a schematic view of a boiler bottom sealing device and a boiler bottom structure according to an embodiment of the present utility model.

Reference numerals: 1. a first sealing plate; 2. a second sealing plate; 3. a water cooling wall; 31. angle iron; 4. a slag bucket; 41. a bottom plate; 5. a first dust baffle; 6. a second dust baffle; 7. a heat preservation layer; 8. and (5) covering.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A boiler bottom sealing device and a boiler bottom structure according to an embodiment of the present utility model are described below with reference to fig. 1.

As shown in fig. 1, the boiler bottom sealing device according to the embodiment of the utility model comprises a first sealing plate 1 and a second sealing plate 2, wherein the first sealing plate 1 is connected with a water cooling wall 3 of a boiler. The second sealing plate 2 is connected with the slag hopper 4 of the boiler and is positioned below the first sealing plate 1, and at least part of the second sealing plate 2 and the first sealing plate 1 are overlapped and are in sliding fit.

According to the boiler bottom sealing device provided by the embodiment of the utility model, the water cooling wall 3 is often expanded with heat and contracted with cold due to the high temperature of the boiler during operation. When the water cooling wall 3 expands downwards, the first sealing plate 1 is driven to slide downwards relative to the second sealing plate 2, and in the process of sliding the first sealing plate 1 and the second sealing plate 2 relatively, the first sealing plate 1 and the second sealing plate 2 keep a fitting state, so that the first sealing plate 1 and the second sealing plate 2 realize real-time sealing on the bottom of the boiler.

As can be seen from the above, the sealing manner of the first sealing plate 1 and the second sealing plate 2 in this embodiment does not introduce water flow, thereby avoiding water consumption. In addition, the boiler ash in the embodiment falls into the slag hopper 4 and is transported downwards by the slag hopper 4, thereby avoiding accumulation of the boiler ash, reducing cleaning of the boiler ash, and saving labor and time. In addition, in the embodiment, because the water seal furnace bottom is avoided, no ash water is generated, thereby solving the problem that the ash water overflows to the outside and ensuring civilized production.

In particular, the first sealing plate 1 is located on the side of the second sealing plate 2 facing away from the boiler furnace.

Specifically, the first sealing plate 1 and the second sealing plate 2 each extend in the vertical direction, and at least portions of the first sealing plate 1 and the second sealing plate 2 overlap and are in sliding fit in the vertical direction.

For ease of understanding, arrow CD in fig. 1 shows the up-down/vertical direction of the boiler bottom sealing arrangement.

In some embodiments, as shown in fig. 1, the boiler bottom sealing device further comprises a first ash baffle 5 and a second ash baffle 6, the first ash baffle 5 is connected with the water-cooled wall 3, the first sealing plate 1 and the second sealing plate 2 form a sealing assembly, and the first ash baffle 5 is positioned on one side of the sealing assembly adjacent to the center of the boiler furnace; the second ash baffle 6 is connected with the slag hopper 4 and is positioned below the first ash baffle 5, the second ash baffle 6 is positioned on one side of the sealing assembly adjacent to the center of the hearth, and at least part of the second ash baffle 6 and the first ash baffle 5 are vertically overlapped.

Therefore, the first ash baffle plate 5 and the second ash baffle plate 6 are used for separating boiler ash and impurities, the furnace ash and impurities are prevented from entering the sliding gap between the first sealing plate 1 and the second sealing plate 2, the relative sliding resistance of the first sealing plate 1 and the second sealing plate 2 is reduced, and the reliable performance of thermal expansion and cold contraction of the cold wall pipe is ensured.

In particular, the second ash deflector 6 is located on the side of the first ash deflector 5 facing away from the centre of the furnace, the second ash deflector 6 being laterally spaced from the first ash deflector 5.

Specifically, the first and second ash baffles 5 and 6 each extend in the vertical direction.

It will be appreciated that the lateral spacing of the first and second ash baffles 5, 6 is greater than the lateral spacing of the first and second seal plates 1, 2.

It will be appreciated that the expansion with heat and contraction with cold of the cold wall tube also drives the first ash baffle 5 to slide downwards relative to the second ash baffle 6, and in the relative sliding of the first ash baffle 5 and the second ash baffle 6, the overlapping part of the two keeps the function of separating the furnace ash and the impurities. The first and second ash baffles 5, 6 thus achieve a real-time blocking of furnace ash and impurities.

For ease of understanding, arrow AB in fig. 1 shows the transverse direction of the boiler bottom sealing arrangement.

In some embodiments, as shown in fig. 1, the boiler bottom sealing device further comprises an insulating layer 7, wherein the insulating layer 7 is positioned on one side of the sealing assembly, which is away from the center of the hearth, and two ends of the insulating layer 7 are respectively connected with the water-cooled wall 3 and the slag bucket 4.

Therefore, the heat preservation layer 7 is used for preserving the boiler bottom, and heat dissipation loss of the boiler bottom is reduced.

In some embodiments, as shown in fig. 1, the boiler bottom sealing device further comprises a skin 8, wherein the skin 8 is positioned on one side of the heat insulation layer 7 away from the center of the hearth, and two ends of the skin 8 are respectively connected with the water-cooled wall 3 and the slag bucket 4.

Therefore, the skin 8 is used for protecting the heat insulation layer 7, so that the heat insulation performance of the heat insulation layer 7 is prevented from being influenced by external impurities entering the heat insulation layer 7, and meanwhile, the service life of the heat insulation layer 7 is prolonged due to the protection effect of the skin 8. In addition, the skin 8 is also used for sealing the boiler bottom again, so that the overflow of the furnace ash at the boiler bottom is avoided.

In some embodiments, as shown in FIG. 1, the skin 8 has a cross-section that is arcuate, protruding outside the firebox.

When the water-cooled wall 3 expands with heat and contracts with cold, the skin 8 is driven to bend and deform, the cross section of the skin 8 is arc-shaped, the deformation direction of the skin 8 is limited, namely, when the skin 8 bends each time under the influence of the water-cooled wall 3, the bending direction is the same, and the structural damage of the skin 8 is reduced.

Specifically, the cross section of the skin 8 projects laterally outward of the firebox.

In some embodiments, as shown in fig. 1, the boiler bottom sealing device further comprises angle irons 31 and a bottom plate 41, wherein the angle irons 31 are arranged at the bottom end of the water-cooled wall 3, and the top ends of the first sealing plate 1, the heat insulation layer 7 and the skin 8 are connected with the angle irons 31; the bottom plate 41 is installed on the top of sediment fill 4, and the bottom of second closing plate 2, heat preservation 7 and covering 8 all links to each other with bottom plate 41.

Thereby, the first sealing plate 1, the heat insulating layer 7 and the skin 8 are connected with the water wall 3 through the angle iron 31. The second sealing plate 2, the heat insulating layer 7 and the skin 8 are connected with the slag bucket 4 through a bottom plate 41.

Specifically, angle iron 31 is welded to water wall 3.

Specifically, the bottom plate 41 is welded to the slag bucket 4.

As shown in fig. 1, the boiler bottom structure according to the embodiment of the utility model comprises the boiler bottom sealing device in the embodiment, a hearth, a water-cooled wall 3 and a slag bucket 4, wherein the bottom end of the hearth forms a slag hole, and the boiler bottom sealing device is positioned below the hearth. The two water-cooling walls 3 are symmetrical in the radial direction of the hearth, the two water-cooling walls 3 are respectively arranged on two opposite peripheral walls of the hearth, the two boiler bottom sealing devices are in one-to-one correspondence with the water-cooling walls 3, and angle irons 31 in the boiler bottom sealing devices are connected with the corresponding water-cooling walls 3. The top of the slag hopper 4 forms a slag inlet, the slag hopper 4 is positioned below the hearth, the slag inlet and the slag outlet are vertically opposite, and the bottom plates 41 in the two boiler bottom sealing devices are respectively arranged on two sides of the top of the slag hopper 4.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims

1. A boiler bottom sealing apparatus, comprising:

the first sealing plate is connected with the water cooling wall of the boiler; and

the second sealing plate is connected with the slag hopper of the boiler and is positioned below the first sealing plate, and at least part of the second sealing plate and the first sealing plate are overlapped and are in sliding fit.

2. The boiler bottom sealing apparatus of claim 1, further comprising:

the first ash blocking plate is connected with the water cooling wall, the first sealing plate and the second sealing plate form a sealing assembly, and the first ash blocking plate is positioned on one side, adjacent to the center of the boiler furnace, of the sealing assembly; and

the second ash baffle is connected with the slag hopper and positioned below the first ash baffle, the second ash baffle is positioned on one side, adjacent to the center of the hearth, of the sealing assembly, and at least part of the second ash baffle and at least part of the first ash baffle are vertically overlapped.

3. The boiler bottom sealing device of claim 2 further comprising an insulating layer located on a side of the sealing assembly facing away from the center of the furnace, wherein two ends of the insulating layer are respectively connected to the water wall and the slag hopper.

4. The boiler bottom sealing device according to claim 3, further comprising a skin, wherein the skin is located on a side of the heat insulation layer facing away from the center of the hearth, and two ends of the skin are respectively connected with the water-cooled wall and the slag bucket.

5. The boiler bottom sealing apparatus of claim 4 wherein the cross section of the skin is arcuate projecting outwardly of the firebox.

6. The boiler bottom sealing device according to claim 4 or 5, characterized in that the boiler bottom sealing device further comprises:

the angle iron is arranged at the bottom end of the water-cooled wall, and the first sealing plate, the heat insulation layer and the top end of the skin are all connected with the angle iron; and

the bottom plate, the bottom plate install in the top of sediment fill, the second closing plate the heat preservation with the bottom of covering all with the bottom plate links to each other.

7. A boiler bottom structure including the boiler bottom sealing apparatus of claim 6, further comprising:

the bottom end of the hearth forms a slag hole, and the boiler bottom sealing device is positioned below the hearth;

the two water cooling walls are symmetrical in the radial direction of the hearth, the two water cooling walls are respectively arranged on two opposite peripheral walls of the hearth, the two boiler bottom sealing devices are in one-to-one correspondence with the water cooling walls, and the angle irons in the boiler bottom sealing devices are connected with the corresponding water cooling walls; and

the slag hopper is positioned below the hearth, the slag inlet and the slag outlet are vertically opposite, and the bottom plates in the two boiler bottom sealing devices are respectively arranged on two sides of the top end of the slag hopper.