Boiler assembly
By designing the circulation pipeline and pneumatic conveying part, the uniform distribution of the return ash in the circulating fluidized bed boiler is solved, and the problems of large area and uneven distribution of the return ash in the ash filling system are solved, which improves the uniformity of the bed temperature and system efficiency. Extend the service life of key components.
Patent Information
- Application Number
- CN202420283687.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The ash replenishment system of the existing circulating fluidized bed boiler covers a large area, and the ash replenishment is directly replenished into the furnace, resulting in uneven distribution of the ash replenishment and affecting the uniformity of the bed temperature distribution.
A boiler assembly is designed, including a circulation pipeline and a pneumatic conveying part. The ash in the ash warehouse is transported to the return port through the main pipeline and the sub-pipe line. Through the diversion of the pneumatic conveying part and the spreading of the sub-pipe line, the return ash is realized. Evenly distributed; and improve the efficiency and durability of the system through components such as fireproof parts, ash volume adjustment parts, air volume adjustment parts, expansion joints and seals.
Reduces the floor space of boiler components, improves the uniformity of return ash and the uniformity of bed temperature distribution, reduces the backflow of ash and flue gas backflow, and extends the service life of the sub-pipeline and main pipelines .
Smart Images
Figure CN222210301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to a boiler component. Background Art
[0002] Due to its own combustion characteristics, circulating fluidized bed boilers have the advantages of good stable combustion at low loads and strong peak-shaving capabilities. At the same time, circulating fluidized bed boilers account for an increasingly larger proportion in thermal power units, and the role of fluidized bed units in grid peak-shaving is becoming increasingly prominent.
[0003] During the operation of a circulating fluidized bed boiler, a large amount of circulating ash is required to ensure heat transfer on the heating surface in the furnace. In the prior art, the return ash is usually quickly added through an external ash replenishment system, which can increase the amount of return ash entering the furnace in a shorter time, so that more circulating ash can quickly participate in the combustion in the furnace and the heat exchange on the heating surface.
[0004] Usually, the ash replenishment system directly replenishes the return ash into the furnace. However, the external ash replenishment system occupies a large area and usually needs to replenish the return ash directly into the furnace. Such a setting may lead to poor uniformity of bed temperature. Utility Model Content
[0005] The utility model provides a boiler component to solve the problem that the external ash supply system in the prior art occupies a large area and the return ash is directly supplied into the furnace, which may cause uneven distribution of the return ash and thus affect the uniformity of bed temperature distribution.
[0006] The utility model provides a boiler assembly, which includes: a boiler body, including a return port, a furnace and an ash bin connected in sequence; a circulation pipeline, including a main pipeline and multiple branch pipelines, one end of the main pipeline is connected to the ash bin, one end of the multiple branch pipelines are respectively connected to the main pipeline, and the other ends of the multiple branch pipelines are respectively connected to the return port; a pneumatic conveying part, which is arranged on the main pipeline, and the pneumatic conveying part is used to convey the boiler ash in the ash bin to the return port through the main pipeline and the multiple branch pipelines; an auxiliary pipeline, one end of the auxiliary pipeline is connected to the main pipeline, and the other end of the auxiliary pipeline has an open state and a blocked state which are relatively set; a first fan, which is arranged in the auxiliary pipeline, and the first fan is used to blow air into the main pipeline.
[0007] Furthermore, the boiler assembly further includes: a refractory part, which is arranged on the boiler body, and is provided with a mounting port, a conveying channel and an ash outlet. There are multiple mounting ports, and the mounting ports correspond to the branch pipelines one by one. The ends of the branch pipelines away from the main pipeline are respectively passed through the multiple mounting ports, and the ash outlet is connected to the return port. Such an arrangement can improve the protection effect of the branch pipelines and reduce the situation where the branch pipelines are damaged by heat.
[0008] Furthermore, the refractory part is cast by concrete, which has a simple structure and low cost.
[0009] Furthermore, the boiler assembly also includes a shell, the refractory part is arranged in the shell, and the shell is made of a steel plate. Such an arrangement can protect the refractory part and facilitate the connection between the refractory part and the boiler body.
[0010] Furthermore, the boiler assembly also includes: an ash quantity adjustment member, which is arranged on the main pipe to adjust the ash delivery quantity.
[0011] Furthermore, the boiler assembly also includes: an air volume adjustment member, which is arranged on the auxiliary pipeline to adjust the air intake volume.
[0012] Furthermore, the main pipeline includes a plurality of first connecting pipes and a plurality of first expansion joints, and the first connecting pipes and the first expansion joints are alternately connected along the extension direction of the main pipeline. This arrangement allows the length of the main pipeline to have a certain deformation margin as the temperature changes, thereby increasing the service life of the main pipeline.
[0013] Furthermore, the auxiliary pipeline includes a plurality of second connecting pipes and a plurality of second expansion joints, and the second connecting pipes and the second expansion joints are alternately connected along the extension direction of the auxiliary pipeline. Such an arrangement allows the length of the auxiliary pipeline to have a certain deformation margin as the temperature changes, thereby increasing the service life of the auxiliary pipeline.
[0014] Furthermore, the auxiliary pipeline includes a pipeline body and a sealing cover, one end of the pipeline body is connected to the main pipeline, and the sealing cover is arranged at the end of the pipeline body away from the main pipeline, and the sealing cover is used to block or open the pipeline body. Such a setting can facilitate the switching of the auxiliary pipeline between the blocked state and the open state.
[0015] Furthermore, the boiler assembly further comprises: a sealing member arranged between the pipeline body and the sealing cover, the sealing member being used to seal the gap between the pipeline body and the sealing cover. Such an arrangement can improve the sealing effect of the pipeline body.
[0016] The application of the technical solution of the utility model can reduce the floor space of the boiler assembly, and improve the uniformity of the spreading of the return ash into the furnace, and improve the uniformity of the bed temperature distribution. Specifically, when it is necessary to replenish the return ash into the furnace, the pneumatic conveying part is started, so that the ash in the ash bin is diverted into multiple branch pipes through the main pipe, and the ash is scattered to the return port from the multiple branch pipes, and enters the furnace through the return port. In this solution, the arrangement of the circulation pipeline and the pneumatic conveying part allows the return ash to come from the ash bin of the boiler body. With this arrangement, it is not necessary to set up an additional ash replenishment bin or ash replenishment tank, saving floor space; and in this solution, the circulation pipeline includes a main pipe and multiple branch pipes, and the return ash from the main pipe is diverted into multiple branch pipes. With this arrangement, it is possible to improve the uniformity of the distribution of the return ash at the return port, and improve the uniformity of the bed temperature distribution. After the pneumatic conveying unit stops running, the auxiliary pipeline is opened and the first fan is started. This setting can cool the main pipeline and reduce or avoid the backflow of ash or smoke when the pneumatic conveying unit stops working. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0018] Figure 1 A partial structural schematic diagram of a boiler assembly provided by the utility model is shown;
[0019] Figure 2 Shows Figure 1 Schematic diagram of the local structure in.
[0020] The above drawings include the following reference numerals:
[0021] 01. Return material port;
[0022] 10. Main road;
[0023] 11. First connecting pipe; 12. First expansion joint;
[0024] 20. Division of roads;
[0025] 30. Pneumatic conveying unit;
[0026] 40. Auxiliary pipelines;
[0027] 41. second connecting pipe; 42. second expansion joint;
[0028] 50. The first fan;
[0029] 60. Refractory part;
[0030] 70. Shell;
[0031] 80. Ash volume adjustment part;
[0032] 90. Air volume adjustment part. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a boiler assembly, which includes a boiler body, a circulation pipeline, a pneumatic conveying part 30, an auxiliary pipeline 40 and a first fan 50, including a return port 01, a furnace and an ash bin connected in sequence; the circulation pipeline includes a main pipeline 10 and a plurality of branch pipelines 20, one end of the main pipeline 10 is connected to the ash bin, one end of the plurality of branch pipelines 20 are respectively connected to the main pipeline 10, and the other ends of the plurality of branch pipelines 20 are respectively connected to the return port 01; the pneumatic conveying part 30 is arranged on the main pipeline 10, and the pneumatic conveying part 30 is used to convey the boiler ash in the ash bin to the return port 01 through the main pipeline 10 and the plurality of branch pipelines 20; the auxiliary pipeline 40, one end of the auxiliary pipeline 40 is connected to the main pipeline 10, and the other end of the auxiliary pipeline 40 has a relatively set open state and a blocked state; the first fan 50 is arranged in the auxiliary pipeline 40, and the first fan 50 is used to blow air into the main pipeline 10.
[0035] The application of the technical solution of the utility model can reduce the space occupied by the boiler assembly, and improve the uniformity of the return ash spreading into the furnace, and improve the uniformity of the bed temperature distribution. Specifically, when it is necessary to replenish the return ash into the furnace, the pneumatic conveying unit 30 is started, so that the ash in the ash bin is diverted to multiple branch pipes 20 through the main pipe 10, and the ash is scattered to the return port 01 by the multiple branch pipes 20, and enters the furnace through the return port 01. In this solution, the setting of the circulation pipeline and the pneumatic conveying unit 30 allows the return ash to come from the ash bin of the boiler body. In this setting, it is not necessary to set up an additional ash replenishment bin or ash replenishment tank, saving space; and in this solution, the circulation pipeline includes the main pipe 10 and multiple branch pipes 20, and the return ash from the main pipe 10 is diverted into multiple branch pipes 20. In this setting, it can improve the uniformity of the return ash distribution at the return port 01 and improve the uniformity of the bed temperature distribution. After the pneumatic conveying part 30 stops running, the auxiliary pipeline 40 is opened and the first fan 50 is started. Such an arrangement can achieve cooling of the main pipeline 10 and can reduce or avoid the backflow of ash or smoke when the pneumatic conveying part 30 stops working.
[0036] Furthermore, the boiler assembly also includes a refractory portion 60, which is arranged on the boiler body. The refractory portion 60 is provided with an installation port, a conveying channel and an ash outlet. There are multiple installation ports, which correspond to the branch pipes 20 one by one. The ends of the multiple branch pipes 20 away from the main pipe 10 are respectively inserted into the multiple installation ports, and the ash outlet is connected to the return port 01. During the operation of the boiler assembly, the temperature of the boiler body near the furnace is extremely high. The ends of the multiple branch pipes 20 away from the main pipe 10 are arranged close to the furnace. After a long period of operation, under the high temperature of the furnace, the end of the branch pipe 20 close to the furnace may be deformed. The setting of the refractory portion 60 can play a role in heat insulation, reduce the deformation of the branch pipe 20 due to heat, and improve the service life of the branch pipe 20.
[0037] The present solution does not limit the specific form of the refractory portion 60 , as long as the refractory portion 60 has the properties of heat insulation and fire resistance.
[0038] In this embodiment, the fireproof part 60 is cast by concrete, which has low cost, simpler molding and strong fireproof effect.
[0039] Furthermore, the boiler assembly further includes a shell 70, in which the refractory part 60 is disposed, and the shell 70 is made of a steel plate. This arrangement can reduce the occurrence of cracks or damage in the refractory part 60 cast by concrete, so that the shell 70 plays a role in protecting the refractory part 60. Moreover, this arrangement can be connected to the boiler body through the shell 70, so that the refractory part 60 is fixed to the boiler body.
[0040] Furthermore, the boiler assembly further includes an ash amount adjustment member 80, which is disposed on the main pipe 10 to adjust the ash delivery amount. The provision of the ash amount adjustment member 80 can improve the convenience of controlling the ash amount of the return ash.
[0041] Furthermore, the boiler assembly further includes an air volume adjustment member 90, which is arranged on the auxiliary pipeline 40 to adjust the air intake. This arrangement can control the air volume blown from the auxiliary pipeline 40 into the main pipeline 10, thereby improving the adaptability of the device.
[0042] Furthermore, the main pipeline 10 includes a plurality of first connecting pipes 11 and a plurality of first expansion joints 12, and the first connecting pipes 11 and the first expansion joints 12 are alternately connected along the extension direction of the main pipeline 10. The return ash transported from the ash bin to the return port 01 has a certain temperature, which is transmitted to the main pipeline 10, raising the temperature of the main pipeline 10, causing the main pipeline 10 to deform. When the temperature changes, the deformation of the first expansion joint 12 along the axial direction is large, and the first expansion joint 12 cooperates with the first connecting pipe 11 to reduce the deformation effect of temperature change on the main pipeline 10, further improving the service life of the main pipeline 10.
[0043] Furthermore, the auxiliary pipeline 40 includes a plurality of second connecting pipes 41 and a plurality of second expansion joints 42, and the second connecting pipes 41 and the second expansion joints 42 are alternately connected along the extension direction of the auxiliary pipeline 40. When the pneumatic conveying part 30 is working, the end of the auxiliary pipeline 40 away from the main pipeline 10 is in a blocked state, and the high-temperature return material ash in the main pipeline 10 may be blown into the auxiliary pipeline 40, or the high-temperature gas in the main pipeline 10 enters the auxiliary pipeline 40, raising the temperature of the auxiliary pipeline 40, causing the auxiliary pipeline 40 to deform. When the temperature changes, the deformation of the second expansion joint 42 along its axial direction is large. The cooperation between the second expansion joint 42 and the second connecting pipe 41 can reduce the deformation effect of temperature change on the auxiliary pipeline 40, and further improve the life of the auxiliary pipeline 40.
[0044] In this embodiment, the auxiliary pipeline 40 includes a pipeline body and a sealing cover, one end of the pipeline body is connected to the main pipeline 10, and the sealing cover is arranged at the end of the pipeline body away from the main pipeline 10, and the sealing cover is used to block or open the pipeline body. Such a configuration can facilitate the switching of the auxiliary pipeline 40 between a blocked state and an open state.
[0045] In this embodiment, the sealing cover can be hingedly arranged at one end of the pipeline body away from the main pipeline 10, and the auxiliary pipeline also includes a fastener, and the sealing cover is connected to the pipeline body through the fastener. Such an arrangement has a simple structure and is easy to operate.
[0046] Furthermore, the boiler assembly further includes a seal, which is disposed between the pipeline body and the sealing cover, and is used to seal the gap between the pipeline body and the sealing cover. The provision of the seal can improve the sealing performance of the sealing cover on the pipeline body, and reduce the possibility of return ash escaping when the pneumatic conveying part 30 is working.
[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0049] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A boiler assembly, characterized in that: The boiler assembly comprises: The boiler body comprises a return port (01), a furnace and an ash storage which are connected in sequence; A circulation pipeline, comprising a main pipeline (10) and a plurality of branch pipelines (20), wherein one end of the main pipeline (10) is connected to the ash bin, one end of the plurality of branch pipelines (20) is respectively connected to the main pipeline (10), and the other ends of the plurality of branch pipelines (20) are respectively connected to the return port (01); A pneumatic conveying unit (30) is arranged on the main pipeline (10), and the pneumatic conveying unit (30) is used to convey the boiler ash in the ash bin to the return port (01) through the main pipeline (10) and the plurality of branch pipelines (20); An auxiliary pipeline (40), one end of the auxiliary pipeline (40) being in communication with the main pipeline (10), and the other end of the auxiliary pipeline (40) having an open state and a blocked state which are relatively arranged; A first fan (50) is disposed in the auxiliary pipeline (40), and the first fan (50) is used to blow air into the main pipeline (10).
2. The boiler assembly according to claim 1, characterized in that The boiler assembly further comprises: The refractory part (60) is arranged on the boiler body, and the refractory part (60) is provided with a mounting port, a conveying channel and an ash outlet. There are multiple mounting ports, and the mounting ports correspond to the branch pipes (20) one by one. The ends of the multiple branch pipes (20) away from the main pipe (10) are respectively passed through the multiple mounting ports, and the ash outlet is connected to the return port (01).
3. The boiler assembly according to claim 2, characterized in that The fire-resistant part (60) is cast by concrete.
4. The boiler assembly according to claim 3, characterized in that The boiler assembly further comprises a shell (70), the refractory portion (60) is arranged in the shell (70), and the shell (70) is made of a steel plate.
5. The boiler assembly according to claim 1, characterized in that The boiler assembly further comprises: An ash quantity adjustment member (80) is arranged on the main pipeline (10) to adjust the ash delivery quantity.
6. The boiler assembly according to claim 1, characterized in that The boiler assembly further comprises: An air volume adjustment member (90) is arranged on the auxiliary pipeline (40) to adjust the air intake volume.
7. The boiler assembly according to claim 1, characterized in that The main pipe (10) comprises a plurality of first connecting pipes (11) and a plurality of first expansion joints (12), wherein the first connecting pipes (11) and the first expansion joints (12) are alternately connected along an extending direction of the main pipe (10).
8. The boiler assembly according to claim 1, characterized in that The auxiliary pipeline (40) comprises a plurality of second connecting pipes (41) and a plurality of second expansion joints (42), wherein the second connecting pipes (41) and the second expansion joints (42) are alternately connected along an extending direction of the auxiliary pipeline (40).
9. The boiler assembly according to claim 1, characterized in that The auxiliary pipeline (40) comprises a pipeline body and a sealing cover, one end of the pipeline body is connected to the main pipeline (10), and the sealing cover is arranged at an end of the pipeline body away from the main pipeline (10), and the sealing cover is used to block or open the pipeline body.
10. The boiler assembly according to claim 9, characterized in that The boiler assembly further comprises: A sealing member is arranged between the pipeline body and the sealing cover, and is used to seal the gap between the pipeline body and the sealing cover.