Slag discharging device for boiler and boiler

Abstract

The utility model discloses a deslagging device for a boiler and the boiler, and relates to the technical field of boilers, the deslagging device for the boiler comprises a deslagging pipe suitable for being connected with the boiler; the outer side of at least part of the slag discharging pipe is sleeved with the heat preservation sleeve, and the heat preservation sleeve and the slag discharging pipe are arranged in a spaced mode to form a cavity; and the supporting ring is arranged in the cavity and is supported between the slag discharging pipe and the heat preservation sleeve. Therefore, at least part of the outer side of the slag discharging pipe is sleeved with the heat preservation sleeve, the heat preservation sleeve and the slag discharging pipe are arranged at intervals to form the cavity, a certain heat preservation effect can be achieved, the heat loss rate in the slag discharging pipe is reduced, the risk that the slag discharging pipe is blocked due to slag caking can be reduced, smooth slag discharging work is facilitated, and the service life of the slag discharging pipe is prolonged. Moreover, the supporting ring is arranged in the cavity and is supported between the slag discharging pipe and the heat preservation sleeve, so that the structural strength of the slag discharging device can be improved, and the probability of bending and sinking of the slag discharging pipe and / or the heat preservation sleeve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a slag discharge device for a boiler and a boiler. Background Art

[0002] In the related art, at least part of the structure of the boiler's slag discharge pipe is exposed to the air. After the slag is discharged, the interior thereof gradually cools down. When the air temperature is low and the humidity is high, the slag inside the slag discharge pipe may condense, causing the cooled slag to agglomerate and get stuck in the slag discharge pipe, thereby causing the slag discharge pipe to be blocked and affecting the smooth progress of the slag discharge work. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a slag discharge device for a boiler, wherein the slag discharge pipe of the boiler has a low heat loss rate, thereby reducing the risk of slag agglomeration causing clogging of the slag discharge pipe and facilitating smooth slag discharge.

[0004] The utility model further proposes a boiler.

[0005] According to the utility model, the slag discharge device for a boiler includes: a slag discharge pipe, which is suitable for being connected to the boiler; a thermal insulation sleeve, which is provided on at least part of the outer side of the slag discharge pipe, and the thermal insulation sleeve is spaced apart from the slag discharge pipe to form a cavity; and at least one support ring, which is provided in the cavity and supported between the slag discharge pipe and the thermal insulation sleeve.

[0006] According to the slag discharge device for a boiler of the present invention, by providing a thermal insulation sleeve on at least part of the outer side of the slag discharge pipe and spacing the thermal insulation sleeve and the slag discharge pipe to form a cavity, a certain thermal insulation effect can be achieved, and the heat loss rate inside the slag discharge pipe can be reduced, thereby reducing the risk of clogging the slag discharge pipe due to slag agglomeration, which is conducive to the smooth progress of the slag discharge work. In addition, by providing a support ring in the cavity and supporting it between the slag discharge pipe and the thermal insulation sleeve, the structural strength of the slag discharge device can be improved, and the probability of bending or sinking of the slag discharge pipe and / or the thermal insulation sleeve can be reduced.

[0007] In some examples of the present invention, there are multiple support rings, and the multiple support rings are arranged at intervals along the extension direction of the slag discharge pipe.

[0008] In some examples of the present invention, the support ring has at least one communicating hole that penetrates the support ring along a thickness direction of the support ring.

[0009] In some examples of the present invention, the slag discharge device for a boiler further includes: a heat-insulating component, which is arranged in the cavity.

[0010] In some examples of the present invention, the slag discharge device for the boiler also includes: a compensator, the slag discharge pipe includes: a first sub-slag discharge pipe and a second sub-slag discharge pipe, the insulation sleeve includes: a first sub-sleeve and a second sub-sleeve, the first sub-slag discharge pipe is at least partially sleeved on the outside with the first sub-sleeve, the second sub-slag discharge pipe is at least partially sleeved on the outside with the second sub-sleeve, the compensator is connected between the first sub-slag discharge pipe and the second sub-slag discharge pipe, and the compensator can be telescopic.

[0011] In some examples of the present invention, the compensator is connected between the first sub-bushing and the second sub-bushing.

[0012] In some examples of the present invention, the compensator is constructed as a sleeve-type compensator or a bellows-type compensator.

[0013] In some examples of the present invention, the slag discharge device for a boiler further includes: a locking member, which is provided on the slag discharge pipe and can close the outlet end of the slag discharge pipe.

[0014] In some examples of the present invention, the boiler includes a water-cooled air chamber, which is arranged at the bottom of the furnace of the boiler, the slag discharge pipe is passed through the water-cooled air chamber, and the insulation sleeve is arranged outside the water-cooled air chamber.

[0015] The boiler according to the present invention comprises the above-mentioned slag discharge device for the boiler.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a slag discharge device according to an embodiment of the present utility model;

[0019] Figure 2 It is an enlarged schematic diagram of the slag discharge device according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] Slag discharge device 100;

[0022] Slag discharge pipe 10; first sub-slag discharge pipe 11; second sub-slag discharge pipe 12;

[0023] Insulation casing 20; first sub-casing 21; second sub-casing 22;

[0024] Support ring 30; cavity 40; compensator 50; locking member 60; water-cooling air chamber 70;

[0025] Wind hood 80; wind distribution plate 81. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] Reference below Figure 1 and Figure 2 A slag discharge device 100 for a boiler according to an embodiment of the present invention is described.

[0028] like Figure 1 and Figure 2 As shown, the slag discharge device 100 according to an embodiment of the present invention includes: a slag discharge pipe 10 , a thermal insulation sleeve 20 and at least one support ring 30 .

[0029] The slag discharge pipe 10 is suitable for connection with the boiler; at least part of the outer side of the slag discharge pipe 10 is provided with an insulation sleeve 20, and the insulation sleeve 20 is spaced apart from the slag discharge pipe 10 to form a cavity 40; the support ring 30 is provided in the cavity 40 and supported between the slag discharge pipe 10 and the insulation sleeve 20.

[0030] Among them, the slag discharge pipe 10 can be connected to the boiler, and the connection method between the slag discharge pipe 10 and the boiler can be but is not limited to welding, bolt connection, etc. As some embodiments of the present application, the slag discharge pipe 10 is connected to the boiler by welding, and the slag generated by the boiler can be discharged through the slag discharge pipe 10.

[0031] At least a portion of the outer side of the slag discharge pipe 10 is sheathed with a thermal insulation sleeve 20, that is, a portion of the outer side of the slag discharge pipe 10 is sheathed with the thermal insulation sleeve 20, or the entire outer side of the slag discharge pipe 10 is sheathed with the thermal insulation sleeve 20. In some embodiments of the present application, a portion of the outer side of the slag discharge pipe 10 is sheathed with the thermal insulation sleeve 20. The thermal insulation sleeve 20 is spaced apart from the slag discharge pipe 10 to form a cavity 40, that is, the thermal insulation sleeve 20 is sheathed on the slag discharge pipe 10 without contacting the slag discharge pipe 10, so that a cavity 40 is formed between the thermal insulation sleeve 20 and the slag discharge pipe 10.

[0032] As some embodiments of the present application, the slag discharge device 100 includes a support ring 30 . The support ring 30 is disposed in the cavity 40 , and the support ring 30 is supported between the slag discharge pipe 10 and the insulation sleeve 20 .

[0033] As some embodiments of the present application, the slag discharge device 100 includes a plurality of support rings 30 , each of which is disposed in the cavity 40 , and each of which is supported between the slag discharge pipe 10 and the insulation sleeve 20 .

[0034] As some embodiments of the present application, the insulation sleeve 20 can be connected to the slag discharge pipe 10 through the support ring 30. As some embodiments of the present application, the insulation sleeve 20 can be connected to the water-cooled air chamber 70 at the bottom of the boiler described below. As some embodiments of the present application, the slag discharge pipe 10 can be connected to the compensator 50 described below.

[0035] It should be noted that after the slag produced by the boiler is discharged through the slag discharge pipe 10, the inside of the slag discharge pipe 10 gradually cools down. If the ambient air temperature and humidity of the slag discharge pipe 10 are low, the slag inside the slag discharge pipe 10 may condense and cause the slag discharge pipe 10 to be blocked. By arranging an insulation sleeve 20 on at least part of the outside of the slag discharge pipe 10, it can play an insulation role, reduce the heat loss rate inside the slag discharge pipe 10, and reduce the risk of slag condensation inside the slag discharge pipe 10.

[0036] Therefore, by providing the outer side of at least part of the slag discharge pipe 10 with an insulation sleeve 20 and spacing the insulation sleeve 20 and the slag discharge pipe 10 to form a cavity 40, a certain insulation effect can be achieved, reducing the heat loss rate inside the slag discharge pipe 10, thereby reducing the risk of slag agglomeration causing blockage of the slag discharge pipe 10, which is conducive to the smooth progress of the slag discharge work. In addition, by providing the support ring 30 in the cavity 40 and supporting it between the slag discharge pipe 10 and the insulation sleeve 20, the structural strength of the slag discharge device 100 can be improved, and the probability of the slag discharge pipe 10 and / or the insulation sleeve 20 bending or sinking can be reduced.

[0037] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, there are multiple support rings 30, which are arranged along the extension direction of the slag discharge pipe 10 (i.e. Figure 1 In the Z direction shown in the figure), a plurality of support rings 30 are arranged at intervals.

[0038] That is, the slag discharge device 100 includes a plurality of support rings 30, and the plurality of support rings 30 are all arranged in the cavity 40, and along the extension direction of the slag discharge pipe 10 (ie Figure 1 In the Z direction shown in the figure), a plurality of support rings 30 are arranged at intervals, and the plurality of support rings 30 are all supported between the slag discharge pipe 10 and the insulation sleeve 20.

[0039] By making the support ring 30 multiple and making the multiple support rings 30 extend along the extension direction of the slag discharge pipe 10 (ie Figure 1The slag discharge pipe 10 and the insulation sleeve 20 are arranged at intervals (in the Z direction shown in the figure), which can separate the slag discharge pipe 10 from the insulation sleeve 20, and can achieve the technical effect of insulation. Moreover, such an arrangement can effectively improve the structural strength of the slag discharge device 100, which is beneficial to improving the reliability of the slag discharge device 100.

[0040] In some embodiments of the present invention, the support ring 30 has at least one communicating hole that penetrates the support ring 30 along the thickness direction of the support ring 30, that is, the support ring 30 has a communicating hole that penetrates the support ring 30 along the thickness direction of the support ring 30, or the support ring 30 has multiple communicating holes that penetrate the support ring 30 along the thickness direction of the support ring 30, wherein the thickness direction of the support ring 30 can be understood as the extension direction of the slag discharge pipe 10 (i.e. Figure 1 Z direction as shown).

[0041] It should be noted that the support ring 30 can divide the cavity 40 into multiple sub-cavities. By providing the support ring 30 with at least one connecting hole that penetrates the support ring 30 along the thickness direction of the support ring 30, the sub-cavities on both sides of the support ring 30 can be connected, so that the gas in the sub-cavities on both sides of the support ring 30 can circulate, thereby making the temperatures in the multiple sub-cavities tend to be consistent, and making the temperatures in various parts of the cavity 40 tend to be consistent, which is beneficial to reducing the risk of local low temperature and reducing the probability of slag agglomerates stuck in the slag discharge pipe 10.

[0042] In some embodiments of the present invention, the slag discharge device 100 for the boiler also includes: an insulation part, which is arranged in the cavity 40. The insulation part can be but is not limited to a polystyrene insulation board, a silicate insulation board, etc. By arranging the insulation part in the cavity 40, the insulation effect of the insulation sleeve 20 can be significantly improved, and the probability of slag agglomeration stuck in the slag discharge pipe 10 can be further reduced, which is conducive to the smooth progress of the slag discharge work.

[0043] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the slag discharge device 100 for a boiler further includes: a compensator 50, the slag discharge pipe 10 includes: a first sub-slag discharge pipe 11 and a second sub-slag discharge pipe 12, the insulation casing 20 includes: a first sub-casing 21 and a second sub-casing 22, the first sub-slag discharge pipe 11 is at least partially sheathed on the outside with the first sub-casing 21, the second sub-slag discharge pipe 12 is at least partially sheathed on the outside with the second sub-casing 22, the compensator 50 is connected between the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12, and the compensator 50 can be extended and retracted.

[0044] Among them, the first sub-slag discharge pipe 11 is at least partially sheathed with the first sub-casing 21 on the outside, that is, the first sub-slag discharge pipe 11 is partially sheathed with the first sub-casing 21 on the outside, or the first sub-slag discharge pipe 11 is entirely sheathed with the first sub-casing 21 on the outside, and the second sub-slag discharge pipe 12 is at least partially sheathed with the first sub-casing 21 on the outside, that is, the second sub-slag discharge pipe 12 is partially sheathed with the second sub-casing 22 on the outside, or the second sub-slag discharge pipe 12 is entirely sheathed with the second sub-casing 22 on the outside.

[0045] The compensator 50 is connected between the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12. In other words, the compensator 50 is connected to the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12. In some embodiments of the present application, the compensator 50 is connected to the first sub-slag discharge pipe 11 by welding. In some embodiments of the present application, the compensator 50 is connected to the second sub-slag discharge pipe 12 by welding. In some embodiments of the present application, the compensator 50 is sleeved on the outside of the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12.

[0046] It can be understood that the compensator 50 is connected to the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12, so that the slag produced by the boiler can be discharged through the first sub-slag discharge pipe 11, the compensator 50, and the second sub-slag discharge pipe 12 in sequence, and the compensator 50 can be extended and retracted for compensation. Specifically, the compensator 50 can be extended and retracted to compensate for the expansion of the slag discharge pipe 10 when heated, so as to reduce the risk of cracking at the connection between the slag discharge pipe 10 and the boiler.

[0047] By connecting the compensator 50 between the first sub-slag discharge pipe 11 and the second sub-slag discharge pipe 12, the compensator 50 can compensate for the expansion of the slag discharge pipe 10 when heated, thereby reducing the probability of cracking at the connection between the boiler and the slag discharge pipe 10 due to thermal expansion, which is beneficial to improving the service life of the slag discharge device 100.

[0048] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the compensator 50 is connected between the first sub-casing 21 and the second sub-casing 22, that is, the compensator 50 is connected to the first sub-casing 21, and the compensator 50 is connected to the second sub-casing 22. By connecting the compensator 50 between the first sub-casing 21 and the second sub-casing 22, the compensator 50 can provide an installation point for the first sub-casing 21 and the second sub-casing 22, so as to improve the installation stability of the first sub-casing 21 and the second sub-casing 22, which is beneficial to improving the overall structural stability of the slag discharge device 100, and can make the compensator 50 more stably compensate for the expansion of the slag discharge pipe 10 when heated, which is beneficial to improving the service life of the slag discharge device 100.

[0049] In some embodiments of the present invention, the compensator 50 is configured as a sleeve-type compensator 50 or a bellows-type compensator 50 .

[0050] As some embodiments of the present application, the compensator 50 is constructed as a sleeve-type compensator 50, which can automatically expand and contract to compensate for the expansion of the slag discharge pipe 10 when heated, so as to reduce the risk of cracking at the connection between the slag discharge pipe 10 and the boiler.

[0051] As some embodiments of the present application, the compensator 50 is constructed as a corrugated compensator 50, which compensates for the expansion of the slag discharge pipe 10 when heated by the expansion and contraction of its peaks and troughs, so as to reduce the risk of cracking at the connection between the slag discharge pipe 10 and the boiler.

[0052] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the slag discharge device 100 for the boiler further includes: a locking member 60, which is provided on the slag discharge pipe 10 and can open or close the outlet end of the slag discharge pipe 10, that is, along the extension direction of the slag discharge pipe 10 (i.e. Figure 1 The slag discharge pipe 10 has an outlet end, and the slag produced by the boiler can be discharged through the outlet end of the slag discharge pipe 10. The locking member 60 is provided at the outlet end of the slag discharge pipe 10, and the locking member 60 can open or close the outlet end of the slag discharge pipe 10. When the locking member 60 opens the outlet end of the slag discharge pipe 10, the slag produced by the boiler can be discharged through the outlet end of the slag discharge pipe 10.

[0053] The locking member 60 can be, but is not limited to, a manual locking member 60, an automatic locking member 60, etc. As some embodiments of the present application, the outlet end of the slag discharge pipe 10 is provided with a manual locking member 60, so that the outlet end of the slag discharge pipe 10 can be safely and stably closed. As some embodiments of the present application, the outlet end of the slag discharge pipe 10 is provided with an automatic locking member 60. This setting does not require on-site operation by personnel, can facilitate the closure of the outlet end of the slag discharge pipe 10, and is conducive to improving the operational convenience of the slag discharge assembly 100.

[0054] By arranging the locking member 60 at the outlet end of the slag discharge pipe 10 , the outlet end of the slag discharge pipe 10 can be closed when slag discharge is not required, so that the boiler can operate reliably.

[0055] In some embodiments of the present invention, Figure 1 As shown, the boiler includes a water-cooling air chamber 70 , which is arranged at the bottom of the furnace of the boiler. The slag discharge pipe 10 is passed through the water-cooling air chamber 70 , and the insulation sleeve 20 is arranged outside the water-cooling air chamber 70 .

[0056] Among them, the water-cooled air chamber 70 is arranged at the bottom of the furnace of the boiler, and the water-cooled air chamber 70 is used to cool the bottom of the furnace. The slag discharge pipe 10 is passed through the water-cooled air chamber 70, that is, the slag discharge pipe 10 passes through the water-cooled air chamber 70 and extends to the outside. As some embodiments of the present application, the insulation sleeve 20 is arranged outside the water-cooled air chamber 70, that is, the insulation sleeve 20 is sleeved on the part of the slag discharge pipe 10 located outside the water-cooled air chamber 70. As some embodiments of the present application, the insulation sleeve 20 is connected to the water-cooled air chamber 70 by welding.

[0057] By passing the slag discharge pipe 10 through the water-cooled air chamber 70 and arranging the thermal insulation sleeve 20 outside the water-cooled air chamber 70, the setting position of the slag discharge pipe 10 can be made reasonable, and the part of the slag discharge pipe 10 located outside can be reduced, which can reduce the interference of the external environment on the slag discharge pipe 10, and is conducive to the smooth progress of the slag discharge work. Moreover, the required size of the thermal insulation sleeve 20 can be reduced, which is conducive to cost saving. In addition, the water-cooled air chamber 70 can provide an installation point for the thermal insulation sleeve 20 to improve the installation firmness of the thermal insulation sleeve 20.

[0058] As some embodiments of this application, Figure 1 As shown, an air distribution plate 81 is provided at the bottom of the furnace of the boiler, and the slag discharge pipe 10 is installed on the air distribution plate 81. As some embodiments of the present application, a plurality of air hoods 80 are provided at the bottom of the furnace of the boiler.

[0059] The boiler according to the embodiment of the present invention includes the slag discharge device 100 for the boiler of the above embodiment. By providing the outer side of at least part of the slag discharge pipe 10 with an insulation sleeve 20 and spacing the insulation sleeve 20 from the slag discharge pipe 10 to form a cavity 40, a certain insulation effect can be achieved, reducing the heat loss rate inside the slag discharge pipe 10, thereby reducing the risk of clogging the slag discharge pipe 10 due to slag agglomeration, which is conducive to the smooth progress of the slag discharge work. In addition, by providing the support ring 30 in the cavity 40 and supporting it between the slag discharge pipe 10 and the insulation sleeve 20, the structural strength of the slag discharge device 100 can be improved, and the probability of bending or sinking of the slag discharge pipe 10 and / or the insulation sleeve 20 can be reduced.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0061] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0062] In the description of the present invention, “plurality” means two or more.

[0063] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0064] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0065] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A slag discharge device for a boiler, characterized in that: include: a slag discharge pipe, the slag discharge pipe being suitable for being connected to the boiler; A thermal insulation sleeve, at least part of the outer side of the slag discharge pipe is covered with the thermal insulation sleeve, and the thermal insulation sleeve and the slag discharge pipe are spaced apart to form a cavity; A plurality of support rings are provided in the cavity and supported between the slag discharge pipe and the thermal insulation sleeve. The plurality of support rings are arranged at intervals along the extension direction of the slag discharge pipe. The support ring has at least one connecting hole penetrating the support ring along the thickness direction of the support ring.

2. The slag discharge device for a boiler according to claim 1, characterized in that: Also includes: A heat-insulating component is arranged in the cavity.

3. The slag discharge device for a boiler according to claim 1, characterized in that: Also includes: The compensator comprises: a first sub-slag discharge pipe and a second sub-slag discharge pipe, and the thermal insulation sleeve comprises: a first sub-sleeve and a second sub-sleeve. The first sub-slag discharge pipe is at least partially sleeved on the outside with the first sub-sleeve, and the second sub-slag discharge pipe is at least partially sleeved on the outside with the second sub-sleeve. The compensator is connected between the first sub-slag discharge pipe and the second sub-slag discharge pipe, and the compensator can be extended and retracted.

4. The slag discharge device for a boiler according to claim 3, characterized in that: The compensator is connected between the first sub-bushing and the second sub-bushing.

5. The slag discharge device for a boiler according to claim 3, characterized in that: The compensator is configured as a sleeve-type compensator or a bellows-type compensator.

6. The slag discharge device for a boiler according to claim 1, characterized in that: Also includes: A locking member is provided on the slag discharge pipe and is capable of closing the outlet end of the slag discharge pipe.

7. The slag discharge device for a boiler according to claim 1, characterized in that: The boiler comprises a water-cooling air chamber, the water-cooling air chamber is arranged at the bottom of the furnace of the boiler, the slag discharge pipe is passed through the water-cooling air chamber, and the insulation sleeve is arranged outside the water-cooling air chamber.

8. A boiler, characterized in that: The utility model comprises a slag discharge device for a boiler according to any one of claims 1-7.

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