CN221098593U - Wind distributing hood and fluidized bed boiler - Google Patents

Abstract

The utility model provides an air distribution hood and a fluidized bed boiler, wherein the air distribution hood comprises: a convex outer cover, the inside of which is provided with a containing cavity; the upper end of the convex outer cover is provided with an installation cavity; the circumference of the convex outer cover is provided with a ventilation opening which is communicated with the accommodating cavity; the convex air pipe is internally provided with an air inlet channel; the two ends of the convex air pipe are respectively a first end and a second end, and the first end extends into the accommodating cavity and is in clearance fit with the inner wall of the accommodating cavity so as to pass through air flow; the convex air pipe is also provided with a flow hole which is respectively communicated with the air inlet channel and the accommodating cavity; the convex body is detachably arranged in the mounting cavity and is in limit fit with the inner wall of the mounting cavity; the upper end of the convex body is provided with an arc-shaped surface; the convex body is made of refractory materials. The utility model protects the top of the wind distribution hood from abrasion and high-temperature damage, prolongs the service life of the wind distribution hood, achieves the aim of uniform wind distribution, ensures safe and economical operation of the fluidized bed boiler, and realizes long-period operation of the fluidized bed boiler.

Description

Wind distributing hood and fluidized bed boiler

Technical Field

The utility model relates to the technical field of air distribution equipment of fluidized bed boilers, in particular to an air distribution hood and a fluidized bed boiler.

Background

The air distribution hood of the circulating fluidized bed boiler is a part of a primary air inlet device of the boiler, and the primary air inlet device has the function of enabling air to uniformly enter a combustion zone at the bottom end of the boiler so as to ensure the combustion of fuel; the wind distribution hood can play a role in uniformly distributing wind, so that the whole hearth is fluidized uniformly, local coking is avoided, and safe and economic operation of the fluidized bed boiler is ensured; the primary air inlet device comprises an air distribution plate and a plurality of air distribution caps densely arranged on the air distribution plate, and the conventional air distribution caps are in the forms of mushrooms, columns, spheres, umbrella shapes and the like.

At present, the existing wind distribution wind cap has the problems that the wind hole of the outer cover is seriously worn, the top is leaked due to wear, and even the wind cap falls off during operation; after the top of the blast cap is worn and leaked or falls off, slag in the boiler furnace can leak into the air chamber, thereby affecting the normal operation; meanwhile, the serious abrasion of the air holes of the outer cover and the slag entering of the air chamber can cause the problems of uneven air distribution and reduced resistance of the air distribution plate, and in order to ensure normal fluidization, the primary air quantity is usually increased, and the primary air quantity is increased to accelerate the abrasion of the air holes of the outer cover, the abrasion of the heating surface of the hearth and seriously influence the safe and economic operation of the fluidized bed boiler; meanwhile, after the existing hood is damaged, the overhaul and maintenance difficulty is high, and the replacement period is long.

Disclosure of utility model

The utility model provides an air distribution hood and a fluidized bed boiler, which are used for solving the problems that the top of the hood is easy to wear and difficult to replace and maintain in the prior art.

In order to solve the above-described problems, according to an aspect of the present utility model, there is provided a wind distribution cap for use on a wind distribution plate of a fluidized bed boiler, the wind distribution cap comprising: the convex outer cover is internally provided with a containing cavity, and the opening of the containing cavity faces the lower end of the convex outer cover; the upper end of the convex outer cover is provided with an installation cavity; the circumference of the convex outer cover is provided with a ventilation opening which is communicated with the accommodating cavity; the convex air pipe is internally provided with an air inlet channel; the two ends of the convex air pipe are respectively a first end and a second end, and the first end extends into the accommodating cavity from the opening of the accommodating cavity and is in clearance fit with the inner wall of the accommodating cavity so as to pass through air flow; the convex air pipe is also provided with a flow hole which is respectively communicated with the air inlet channel and the accommodating cavity; the convex body is detachably arranged in the mounting cavity and is in limit fit with the inner wall of the mounting cavity; the upper end of the convex body is provided with an arc-shaped surface; the convex body is made of refractory materials; the air flow in the air inlet channel enters the accommodating cavity from the circulating hole, passes through the gap between the convex air pipe and the inner wall of the accommodating cavity, flows out of the ventilation opening and enters the furnace body of the fluidized bed boiler.

Further, the wind distribution hood further comprises a connecting piece; the convex outer cover is also provided with a first mounting hole, and two ends of the first mounting hole are respectively communicated with the accommodating cavity and the mounting cavity; the first end is provided with a second mounting hole; one end of the connecting piece is positioned in the mounting cavity; the other end of the connecting piece penetrates through the first mounting hole and is in threaded fit with the inner wall of the second mounting hole so as to fix the convex outer cover and the convex air pipe relatively.

Further, the wind distribution hood further comprises a sealing gasket, and the sealing gasket is arranged between the first end and the inner wall of the accommodating cavity; the middle part of the sealing gasket is provided with a through hole, and the other end of the connecting piece penetrates through the through hole to be in threaded fit with the inner wall of the second mounting hole.

Further, the gasket is made of a high-temperature-resistant material.

Further, one end of the sealing gasket in the axial direction is abutted with the first end, and the other end of the sealing gasket in the axial direction is abutted with the top wall of the accommodating cavity in the axial direction; the outer peripheral surface of the sealing gasket is in sealing fit with the inner wall of the accommodating cavity in the circumferential direction.

Further, the connecting piece is a bolt, and the bolt is made of high-temperature resistant materials; the external thread on the bolt is in threaded fit with the internal thread on the inner wall of the second mounting hole.

Further, the bottom wall of the mounting cavity is provided with a protruding portion, the first mounting hole penetrates through the protruding portion, and one end of the bolt located in the mounting cavity is in butt fit with the protruding portion.

Further, the arc-shaped surface is a spherical surface, and the spherical surface covers the upper end of the convex outer cover.

According to another aspect of the present utility model, there is provided a fluidized bed boiler including the above-described hood.

Further, the fluidized bed boiler also comprises a furnace body and an air distribution plate, wherein the air distribution plate is arranged in the furnace body and is provided with a mounting opening communicated with the upper part and the lower part of the air distribution plate, and the second end of the convex air pipe in the air distribution hood is matched with the inner wall of the mounting opening so as to fix the convex air pipe on the air distribution plate; the air inlet channel is communicated with the lower part of the air distribution plate; the lower part of the air distribution plate is a primary air inlet chamber of the furnace body, the upper part of the air distribution plate is a combustion zone of the furnace body, and air flow in the primary air inlet chamber enters the combustion zone through the air distribution hood so as to provide air for the combustion of fuel in the combustion zone.

By applying the technical scheme of the utility model, in one aspect, the utility model provides an air distribution hood, which is used on an air distribution plate of a fluidized bed boiler and comprises: the convex outer cover is internally provided with a containing cavity, and the opening of the containing cavity faces the lower end of the convex outer cover; the upper end of the convex outer cover is provided with an installation cavity; the circumference of the convex outer cover is provided with a ventilation opening which is communicated with the accommodating cavity; the convex air pipe is internally provided with an air inlet channel; the two ends of the convex air pipe are respectively a first end and a second end, and the first end extends into the accommodating cavity from the opening of the accommodating cavity and is in clearance fit with the inner wall of the accommodating cavity so as to pass through air flow; the convex air pipe is also provided with a flow hole which is respectively communicated with the air inlet channel and the accommodating cavity; the convex body is detachably arranged in the mounting cavity and is in limit fit with the inner wall of the mounting cavity; the upper end of the convex body is provided with an arc-shaped surface; the convex body is made of refractory materials; the air flow in the air inlet channel enters the accommodating cavity from the circulating hole, passes through the gap between the convex air pipe and the inner wall of the accommodating cavity, flows out of the ventilation opening and enters the furnace body of the fluidized bed boiler. According to the wind distribution hood, the convex body is made of the refractory material, so that the temperature of the top of the hood is reduced, the top of the wind distribution hood is protected from abrasion and high-temperature damage, the service life of the hood is prolonged, the purpose of uniform wind distribution is achieved, the safe and economic operation of the fluidized bed boiler is ensured, and the long-period operation of the fluidized bed boiler is realized; the convex outer cover, the convex air pipe and the convex body are of split structures, so that the wind distribution hood is easy to disassemble, assemble and maintain later, the maintenance difficulty of the hood is reduced, and the replacement period is effectively shortened; the wind distribution hood provided by the utility model has the advantages of simple structure, low cost, long service life, convenience in overhaul and maintenance, short replacement period, wear resistance and high temperature resistance, and is suitable for large-area popularization and use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a specific structural schematic diagram of the inside of a wind distribution hood according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. A wind distribution plate;

20. a convex outer cover; 21. a receiving chamber; 22. a mounting cavity; 23. a vent; 24. a first mounting hole; 25. a protruding portion;

30. A convex air pipe; 31. an air inlet channel; 32. a first end; 33. a second end; 34. a flow hole; 35. a second mounting hole;

40. A convex body; 41. an arc surface;

50. a connecting piece;

60. a sealing gasket; 61. and a through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, an embodiment of the present utility model provides a wind cap for use on a wind deflector 10 of a fluidized bed boiler, the wind cap comprising: a convex outer cover 20, a convex air duct 30 and a convex body 40;

The convex outer cover 20 is internally provided with a containing cavity 21, and an opening of the containing cavity 21 faces to the lower end of the convex outer cover 20; the upper end of the convex housing 20 has a mounting cavity 22; the circumference of the convex outer cover 20 is provided with a vent 23, and the vent 23 is communicated with the accommodating cavity 21;

The convex air pipe 30 is internally provided with an air inlet channel 31; the two ends of the convex air pipe 30 are respectively provided with a first end 32 and a second end 33, and the first end 32 extends into the accommodating cavity 21 from the opening of the accommodating cavity 21 and is in clearance fit with the inner wall of the accommodating cavity 21 so as to pass through air flow; the convex air pipe 30 is also provided with a circulation hole 34 which is respectively communicated with the air inlet channel 31 and the accommodating cavity 21;

The convex body 40 is detachably arranged in the mounting cavity 22 and is in limit fit with the inner wall of the mounting cavity 22; the upper end of the convex body 40 is provided with an arc-shaped surface 41; the convex body 40 is made of refractory material;

The air flow in the air inlet channel 31 enters the accommodating cavity 21 from the circulating hole 34, passes through the gap between the convex air pipe 30 and the inner wall of the accommodating cavity 21, flows out of the ventilation opening 23 and enters the furnace body of the fluidized bed boiler.

According to the wind distribution hood provided by the utility model, the convex body 40 is made of refractory materials, so that the temperature of the top of the hood is reduced, the top of the wind distribution hood is protected from abrasion and high-temperature damage, the service life of the hood is prolonged, the purpose of uniform wind distribution is achieved, the safe and economic operation of the fluidized bed boiler is ensured, and the long-period operation of the fluidized bed boiler is realized; the convex outer cover 20, the convex air pipe 30 and the convex body 40 are of split structures, so that the wind distribution hood is easy to disassemble, assemble and maintain later, the maintenance difficulty of the hood is reduced, and the replacement period is effectively shortened; the wind distribution hood provided by the utility model has the advantages of simple structure, low cost, long service life, convenience in overhaul and maintenance, short replacement period, wear resistance and high temperature resistance, and is suitable for large-area popularization and use.

In one embodiment of the present utility model, the lower end of the convex outer cover 20 and the position near the vent 23 are thickened to improve the working reliability of the vent 23; the convex body 40 adopts a plastic refractory material, the plastic refractory material can be firmly adsorbed and fixed in the installation cavity 22, the plastic refractory material well protects the top of the wind distribution wind cap, the temperature of the wind cap is reduced, the top of the wind cap is protected from abrasion, and the service life of the wind cap is prolonged.

As shown in fig. 1, the hood further includes a connector 50; the convex housing 20 further has a first mounting hole 24, and both ends of the first mounting hole 24 are respectively communicated with the accommodating chamber 21 and the mounting chamber 22; the first end 32 has a second mounting hole 35; wherein one end of the connector 50 is located within the mounting cavity 22; the other end of the connecting member 50 passes through the first mounting hole 24 and is screw-engaged with the inner wall of the second mounting hole 35 to relatively fix the male housing 20 and the male air duct 30. By this arrangement, the convex type housing 20 and the convex type duct 30 are relatively fixed with a simple structure.

As shown in fig. 1, the wind cap further includes a gasket 60, and the gasket 60 is disposed between the first end 32 and the inner wall of the accommodating chamber 21; wherein, the middle portion of the gasket 60 has a through hole 61, and the other end of the connector 50 passes through the through hole 61 to be screw-fitted with the inner wall of the second mounting hole 35. By providing the gasket 60 to seal the gap between the first end 32 and the inner wall of the receiving cavity 21, the first mounting hole 24 and the second mounting hole 35 are effectively sealed.

Specifically, the gasket 60 is made of a high temperature resistant material. This arrangement ensures the operational reliability and durability of the gasket 60.

As shown in fig. 1, one end of the gasket 60 in the axial direction abuts against the first end 32, and the other end in the axial direction abuts against the top wall of the accommodating chamber 21 in the axial direction; the outer peripheral surface of the packing 60 is in sealing engagement with the inner wall in the circumferential direction of the accommodation chamber 21. This arrangement ensures the sealing effect of the gasket 60 to the maximum.

As shown in fig. 1, the connecting member 50 is a bolt made of a high temperature resistant material; the external threads on the bolt are threadedly engaged with the internal threads on the inner wall of the second mounting hole 35. Through setting up connecting piece 50 to the bolt, the bolt adopts high temperature resistant material for connecting piece 50 is convenient for purchase and change, and effectively reduced the cost.

As shown in fig. 1, the bottom wall of the mounting cavity 22 has a protruding portion 25, the first mounting hole 24 penetrates the protruding portion 25, and one end of the bolt located in the mounting cavity 22 is in abutting fit with the protruding portion 25. By providing the projection 25, accurate positioning and secure connection of the connection member 50 is achieved.

As shown in fig. 1, the arcuate surface 41 is a spherical surface that covers the upper end of the convex housing 20. By providing a spherical surface to cover the upper end of the convex outer cap 20, the upper end of the convex outer cap 20 is less worn inside the furnace body.

The utility model also provides a fluidized bed boiler, which comprises the wind distribution hood.

As shown in fig. 1, the fluidized bed boiler further comprises a furnace body and an air distribution plate 10, wherein the air distribution plate 10 is arranged in the furnace body, the air distribution plate 10 is provided with a mounting opening communicated with the upper part and the lower part of the air distribution plate 10, and the second end 33 of the convex air pipe 30 in the air distribution hood is matched with the inner wall of the mounting opening so as to fix the convex air pipe 30 on the air distribution plate 10; the air inlet channel 31 is communicated with the lower part of the air distribution plate 10; the lower part of the air distribution plate 10 is a primary air inlet chamber of the furnace body, the upper part of the air distribution plate 10 is a combustion zone of the furnace body, and air flow in the primary air inlet chamber enters the combustion zone through an air distribution hood so as to provide air for the combustion of fuel in the combustion zone. By the arrangement, the working reliability of the fluidized bed boiler is ensured.

In summary, the utility model provides a hood and a fluidized bed boiler; according to the wind distribution hood provided by the utility model, the convex body 40 is made of refractory materials, so that the temperature of the top of the hood is reduced, the top of the wind distribution hood is protected from abrasion and high-temperature damage, the service life of the hood is prolonged, the purpose of uniform wind distribution is achieved, the safe and economic operation of the fluidized bed boiler is ensured, and the long-period operation of the fluidized bed boiler is realized; the convex outer cover 20, the convex air pipe 30 and the convex body 40 are of split structures, so that the wind distribution hood is easy to disassemble, assemble and maintain later, the maintenance difficulty of the hood is reduced, and the replacement period is effectively shortened; the wind distribution hood provided by the utility model has the advantages of simple structure, low cost, long service life, convenience in overhaul and maintenance, short replacement period, wear resistance and high temperature resistance, and is suitable for large-area popularization and use.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A wind distribution cap for a wind distribution plate (10) of a fluidized bed boiler, the wind distribution cap comprising:

A convex housing (20) having a receiving chamber (21) therein, an opening of the receiving chamber (21) being directed toward a lower end of the convex housing (20); the upper end of the convex outer cover (20) is provided with an installation cavity (22); the circumference of the convex outer cover (20) is provided with a ventilation opening (23), and the ventilation opening (23) is communicated with the accommodating cavity (21);

A convex air pipe (30) with an air inlet channel (31) inside; the two ends of the convex air pipe (30) are respectively provided with a first end (32) and a second end (33), and the first end (32) extends into the accommodating cavity (21) from the opening of the accommodating cavity (21) and is in clearance fit with the inner wall of the accommodating cavity (21) so as to pass through air flow; the convex air pipe (30) is also provided with a circulation hole (34) which is respectively communicated with the air inlet channel (31) and the accommodating cavity (21);

The convex body (40) is detachably arranged in the mounting cavity (22) and is in limit fit with the inner wall of the mounting cavity (22); the upper end of the convex body (40) is provided with an arc-shaped surface (41); the convex body (40) is made of refractory materials;

The air flow in the air inlet channel (31) enters the accommodating cavity (21) from the circulating hole (34), passes through the gap between the convex air pipe (30) and the inner wall of the accommodating cavity (21), flows out from the ventilation opening (23), and enters the furnace body of the fluidized bed boiler.

2. A wind cap according to claim 1, characterized in that the wind cap further comprises a connection piece (50); the convex outer cover (20) is also provided with a first mounting hole (24), and two ends of the first mounting hole (24) are respectively communicated with the accommodating cavity (21) and the mounting cavity (22); the first end (32) has a second mounting hole (35); wherein one end of the connecting piece (50) is positioned in the mounting cavity (22); the other end of the connecting piece (50) penetrates through the first mounting hole (24) and is in threaded fit with the inner wall of the second mounting hole (35) so as to fix the convex outer cover (20) and the convex air pipe (30) relatively.

3. The wind cap according to claim 2, further comprising a gasket (60), the gasket (60) being arranged between the first end (32) and an inner wall of the receiving cavity (21); wherein, the middle part of the sealing gasket (60) is provided with a through hole (61), and the other end of the connecting piece (50) passes through the through hole (61) to be in threaded fit with the inner wall of the second mounting hole (35).

4. A hood according to claim 3, characterized in that the gasket (60) is made of a high temperature resistant material.

5. A hood according to claim 3, wherein one axial end of the gasket (60) abuts against the first end (32), and the other axial end abuts against the top wall of the housing chamber (21); the outer peripheral surface of the gasket (60) is in sealing engagement with the inner wall of the accommodating chamber (21) in the circumferential direction.

6. The wind cap according to claim 2, wherein the connecting piece (50) is a bolt, the bolt being made of a high temperature resistant material; the external thread on the bolt is in threaded fit with the internal thread on the inner wall of the second mounting hole (35).

7. The wind distribution cap according to claim 6, wherein the bottom wall of the installation cavity (22) is provided with a protruding part (25), the first installation hole (24) penetrates through the protruding part (25), and one end of the bolt in the installation cavity (22) is in abutting fit with the protruding part (25).

8. The wind cap according to claim 1, wherein the arc-shaped surface (41) is a spherical surface, and the spherical surface covers the upper end of the convex outer cover (20).

9. A fluidized bed boiler, characterized by comprising a hood according to any one of claims 1 to 8.

10. The fluidized bed boiler according to claim 9, further comprising a furnace body and an air distribution plate (10), wherein the air distribution plate (10) is arranged in the furnace body, the air distribution plate (10) is provided with a mounting opening communicated with the upper part and the lower part of the air distribution plate (10), and the second end (33) of the convex air pipe (30) in the air distribution hood is matched with the inner wall of the mounting opening so that the convex air pipe (30) is fixed on the air distribution plate (10); the air inlet channel (31) is communicated with the lower part of the air distribution plate (10); the lower part of the air distribution plate (10) is a primary air inlet chamber of the furnace body, the upper part of the air distribution plate (10) is a combustion zone of the furnace body, and air flow in the primary air inlet chamber enters the combustion zone through the air distribution cap so as to provide air for the combustion of fuel in the combustion zone.