Boiler material returning air supply device
By designing a boiler return air supply device with multiple return fans and return devices, the problem of return fan failure affecting production efficiency is solved, and the boiler production efficiency is improved.
Patent Information
- Application Number
- CN202422103975.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-28
AI Technical Summary
When the return fan of the existing boiler fails, the machine needs to be shut down for maintenance, which affects production efficiency. Moreover, when multiple boilers are in production, damage to the return fan affects the overall efficiency.
A boiler return air supply device is designed, which includes a ring return pipe group, a return fan and a return device. By setting up multiple return fans and return devices, simultaneous return of multiple boilers can be achieved. A detachable valve pipe and a stainless steel conveying pipe are set to ensure that the use of other fans is not affected in the event of a failure.
The boiler production efficiency is improved, the structure is simple and stable, and it ensures that when the return fan fails, it will not affect the normal operation of other fans, thereby improving the return efficiency.
Smart Images
Figure CN223360624U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of boiler return air supply, in particular to a boiler return air supply device. Background Art
[0002] The recirculator is a key component of a circulating fluidized bed (CFB). Ash particles and burning coal carried by flue gas pass through the furnace into the separator, where most of the solid particles are separated and returned to the furnace through the recirculator, while the flue gas passes through the upper portion of the separator and enters the rear heating surface. The recirculation ratio of a typical CFB boiler is 5-20. Recirculated ash, which is more than ten times the feed coal, must pass through the recirculator and return to the combustion chamber for further combustion. The recirculation ratio is also regulated by the recirculator.
[0003] The existing return device only has one return fan to provide return air, and no other air source is set. If the return fan fails, it needs to be shut down for maintenance, which greatly affects the production efficiency of the boiler. In addition, the existing production process requires multiple boilers to be equipped for batch production. If the return fan is damaged, it will also affect the efficiency of boiler production. Summary of the Invention
[0004] The purpose of the utility model is to solve the above problems in the existing technology and to propose a boiler return air supply device, which has the advantage of improving production efficiency.
[0005] The purpose of the utility model can be achieved through the following technical solutions: a boiler return air supply device, comprising an annular return pipe group, a return blower, a return device, and four boilers arranged in four directions of the return pipe group, each of the boilers is installed with a first conveying pipe, one side of the first conveying pipe is connected to the boiler, and the other side is connected to the return device, the return device is connected to the return blower through a second conveying pipe, and the return blower is connected to the annular return pipe group;
[0006] A first return pipe is installed in the center of the annular return pipe group, and the first return pipe has four branch pipes, and the branch pipes are connected to the corresponding four boilers;
[0007] A detachable valve pipe is provided between the return material blower and the annular return material pipe group, and a one-way valve is provided on the valve pipe.
[0008] Preferably, the valve tube has an insertion end at one end away from the return blower, and the annular return tube group has a third conveying tube in four directions, the third conveying tube has a step portion, and the insertion end is limitedly engaged with the step portion.
[0009] Preferably, a sealing gasket is provided on the step portion.
[0010] Preferably, the first conveying pipe, the second conveying pipe, the annular return pipe group, and the third conveying pipe are all made of stainless steel.
[0011] Preferably, the bottom of the annular return pipe group has supporting feet.
[0012] Compared with the existing technology, the advantages of the present invention are: by setting up an annular return pipe group that can return materials to four boilers at the same time, the ash particles carried by the flue gas generated by the boiler and the burning coal particles are transported by the first conveying pipe to the return device for transportation, and then blown out into the annular return pipe group by their respective return fans, and finally the returned ash is returned to the boiler for re-combustion. If the return fan fails and needs to be shut down for maintenance, it will not affect the normal use of other return fans. At the same time, multiple return fans and return devices operate at the same time, which is conducive to improving the efficiency of return, thereby improving the efficiency of production in the boiler, and the structure is simple and stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a front view of the present utility model.
[0014] Figure 2 It is a partial structural view of the utility model.
[0015] Figure 3 It is a partial top view of the annular return pipe assembly of the present invention.
[0016] Figure 4 It is an enlarged view of point A in the present utility model.
[0017] In the figure, 2, annular return pipe group; 21, first return pipe; 22, branch pipe; 23, third conveying pipe; 231, step portion; 2311, sealing gasket; 3, return blower; 4, return device; 5, boiler; 61, first conveying pipe; 62, second conveying pipe; 71, valve pipe; 711, insertion end; 72, one-way valve; 8, support foot. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0019] like Figures 1 to 4As shown, a return air supply device for a boiler 5 includes an annular return pipe group 2, a return fan 3, a return device 4, and four boilers 5 arranged in four directions of the return pipe group. Each boiler 5 is installed with a first conveying pipe 61. One side of the first conveying pipe 61 is connected to the boiler 5, and the other side is connected to the return device 4. The return device 4 is connected to the return fan 3 through a second conveying pipe 62. The return fan 3 is connected to the annular return pipe group 2.
[0020] A first return pipe 21 is installed in the center of the annular return pipe group 2. The first return pipe 21 has four branch pipes 22, and the branch pipes 22 are connected to the corresponding four boilers 5.
[0021] A detachable valve tube 71 is provided between the return blower 3 and the annular return tube assembly 2 , and a one-way valve 72 is provided on the valve tube 71 .
[0022] In the present invention, the material return device 4 and the material return fan 3 are prior art.
[0023] By adopting the above structure, an annular return pipe group 2 is set up that can return materials to four boilers 5 at the same time. The ash particles carried by the flue gas generated by the boiler 5 and the burning coal particles are transported to the return device 4 by the first conveying pipe 61 for transportation, and then blown out into the annular return pipe group 2 by their respective return fans 3. Finally, the returned ash is returned to the boiler 5 for re-combustion. If the return fan 3 fails and needs to be shut down for maintenance, it will not affect the normal use of other return fans 3. At the same time, multiple return fans 3 and return devices 4 operate at the same time, which is conducive to improving the efficiency of return, thereby improving the efficiency of production in the boiler 5. The structure is simple and stable.
[0024] Specifically, if Figures 1 to 4 As shown, the valve tube 71 has an insertion end 711 at one end away from the return blower 3, and the annular return tube group 2 has a third conveying tube 23 in four directions. The third conveying tube 23 has a step portion 231, and the insertion end 711 is limitedly engaged with the step portion 231.
[0025] By adopting the above structure, an insertion end 711 is provided on the valve tube 71, and the insertion end 711 of the valve tube 71 is inserted into the third conveying tube 23 of the annular return tube group 2 during assembly. At the same time, the third conveying tube 23 is limitedly engaged with the step portion 231, which is conducive to convenient installation and reliable connection. If the return fan 3 fails and needs to be shut down for maintenance and needs to be replaced, it is easy to replace.
[0026] like Figures 1 to 4 As shown, a sealing gasket 2311 is provided on the step portion 231 .
[0027] The provision of the sealing gasket 2311 is helpful in preventing the gas in the third delivery pipe 23 from leaking out, resulting in a better sealing effect and greatly improving the safety of the device, making it safer.
[0028] like Figures 1 to 4 As shown, the first conveying pipe 61, the second conveying pipe 62, the annular return pipe group 2, and the third conveying pipe 23 are all made of stainless steel. By setting the stainless steel material, the service life of the device and the pipeline is extended, it is not easy to rust and damage, and the strength is higher.
[0029] like Figures 1 to 4 As shown, the bottom of the annular return pipe group 2 is provided with support feet 8. By providing the support feet 8, it is conducive to firm fixation and stable structure.
[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is to include three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0032] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.
[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
Claims
1. A boiler return air supply device, characterized in that: The invention comprises an annular return pipe group (2), a return blower (3), a return device (4), and four boilers (5) arranged in four directions of the return pipe group. Each boiler (5) is installed with a first conveying pipe (61). One side of the first conveying pipe (61) is connected to the boiler (5), and the other side is connected to the return device (4). The return device (4) is connected to the return blower (3) through a second conveying pipe (62). The return blower (3) is connected to the annular return pipe group (2). A first return pipe (21) is installed at the center of the annular return pipe group (2), and the first return pipe (21) has four branch pipes (22), and the branch pipes (22) are connected to the corresponding four boilers (5); A detachable valve tube (71) is provided between the return material blower (3) and the annular return material tube group (2), and a one-way valve (72) is provided on the valve tube (71).
2. A boiler return air supply device according to claim 1, characterized in that: The valve tube (71) has an insertion end (711) at one end away from the return blower (3), and the annular return tube group (2) has third conveying tubes (23) in four directions. The third conveying tube (23) has a step portion (231), and the insertion end (711) is position-limitingly engaged with the step portion (231).
3. The boiler return air supply device according to claim 1, characterized in that: The step portion (231) is provided with a sealing gasket (2311).
4. A boiler return air supply device according to claim 1, characterized in that: The first conveying pipe (61), the second conveying pipe (62), the annular return pipe group (2), and the third conveying pipe (23) are all made of stainless steel.
5. The boiler return air supply device according to claim 1, characterized in that: The bottom of the annular return pipe group (2) is provided with supporting feet (8).