Ash conveying device for preventing ash deposition in horizontal flue
By designing an ash conveying device to prevent ash accumulation in horizontal flues, and utilizing the coordinated action of the ash hopper and the airlock, the problem of obstructed expansion of the heating surface and reduced flue gas flow area caused by ash accumulation in the furnace of a coal-fired power plant boiler under low load was solved, thus achieving continuous ash conveying and preventing blockage.
Patent Information
- Application Number
- CN202520449804.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Under long-term low load, fly ash settles in the horizontal flue area of coal-fired power plant boiler furnaces, causing ash accumulation, which leads to obstruction of the expansion of the upper heating surface and a reduction in the flue gas flow area.
Design an ash conveying device to prevent ash accumulation in horizontal flues, including an ash settling component and an ash conveying component. By utilizing the coordinated action of the ash settling funnel, the upper airlock and the lower airlock, the ash is continuously conveyed to prevent accumulation and blockage.
It effectively prevents dust from accumulating and clogging during the conveying process, avoids downtime for maintenance and increased production costs, ensures that dust is continuously conveyed to the next stage, and reduces air leakage caused by pressure changes.
Smart Images
Figure CN223814669U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a boiler technical field more specifically, relate to a kind of ash conveying device for preventing horizontal flue ash deposition. BACKGROUND
[0002] Coal-fired power plant boiler furnace is by furnace wall the three-dimensional space for fuel combustion, also called combustion chamber, which is composed of. Its main function is to organize the combustion process of fuel, to ensure that fuel can burn as much as possible, and convert the chemical energy of fuel into heat energy of combustion products. At the same time, the furnace also undertakes the task of organizing the heat exchange of the furnace, so that the flue gas is cooled to the temperature allowed by the safe operation of the convection heating surface at the outlet of the furnace.
[0003] The coal-fired power plant boiler furnace is settled under long-term low load in horizontal flue area, which leads to ash deposition. After ash deposition, there are some problems, such as the expansion of the upper heating surface being blocked due to ash deposition and the problem of the flue gas flow area becoming smaller. Therefore, an ash removal device is needed to remove the dust in the horizontal flue area. SUMMARY
[0004] The technical problem to be solved by the utility model is that the coal-fired power plant boiler furnace is settled under long-term low load in horizontal flue area, which leads to ash deposition. After ash deposition, there are some problems, such as the expansion of the upper heating surface being blocked due to ash deposition and the problem of the flue gas flow area becoming smaller. Therefore, an ash removal device is needed to remove the dust in the horizontal flue area. In view of the above defects of the prior art, the utility model provides an ash conveying device for preventing horizontal flue ash deposition.
[0005] The utility model adopts the technical scheme to solve the technical problem:
[0006] A kind of ash conveying device for preventing horizontal flue ash deposition is constructed, comprising:
[0007] Ash settling component, the ash settling component includes ash settling hopper;
[0008] Ash conveying component, the ash conveying component includes the first ash inlet pipe piece communicated with the bottom of the ash settling hopper, the first ash inlet pipe piece is sequentially provided with upper air lock and lower air lock from top to bottom.
[0009] Optionally, the first ash inlet pipe piece includes first ash inlet pipeline, second ash inlet pipeline and third ash inlet pipeline sequentially arranged from top to bottom, the first ash inlet pipeline is detachably connected with the top of the upper air lock, the top and bottom of the second ash inlet pipeline are detachably connected with the bottom of the upper air lock and the top of the lower air lock respectively, and the top of the third ash inlet pipeline is detachably connected with the bottom of the lower air lock.
[0010] Optionally, a second ash inlet pipe for connecting the first ash inlet pipe with the ash settling hopper is further included, and the bottom of the ash settling hopper is inserted into the second ash inlet pipe and connected with the second ash inlet pipe through a first expansion joint.
[0011] Optionally, a bending is arranged at the middle part of the second ash inlet pipe, and the end of the second ash inlet pipe away from the ash settling hopper is integrally formed with the first ash inlet pipe.
[0012] Optionally, the top of the first ash inlet pipe is connected with the bottom of the second ash inlet pipe, and the bottom of the first ash inlet pipe is connected with the economizer ash hopper.
[0013] Optionally, a fence is arranged at the opening of the ash settling hopper.
[0014] Optionally, the bottom of the first ash inlet pipe and the top of the second ash inlet pipe are connected with the upper lock through a second expansion joint.
[0015] Optionally, the bottom of the second ash inlet pipe and the top of the third ash inlet pipe are connected with the lower lock through a third expansion joint.
[0016] The utility model discloses the beneficial effect lies in:
[0017] The utility model discloses a set up ash settling subassembly and ash conveying subassembly, ash settling subassembly includes ash settling hopper, ash conveying subassembly includes with the bottom of ash settling hopper is connected with first ash inlet pipe, first ash inlet pipe is arranged with upper lock and lower lock from top to bottom in proper order, when using the utility model, the ash in horizontal flue under the action of gravity, enters the ash settling hopper of lower part, then by ash settling hopper enters first ash inlet pipe, and after passing through upper lock and lower lock, enters the economizer ash hopper below, when the ash gravity of upper lock inside is greater than the counterweight moment of outside, upper lock acts, and the ash enters lower lock, when the ash gravity of lower lock inside is greater than the counterweight moment of outside, lower lock acts, makes the dust in first ash inlet pipe enter the economizer ash hopper, and the upper and lower lock do not act simultaneously, prevent the front and rear intercommunication, and the arrangement of upper lock and lower lock ensures the continuity of dust in the conveying process, prevents the air intercommunication of coal powder or ash particle when pressure changes, thereby maintaining the smooth flow of powder particle, which ensures that the dust can continuously and unceasingly convey from ash settling hopper to the next link through first ash inlet pipe, and through the coordination of upper lock and lower lock, effectively prevent the accumulation and blockage of dust in first ash inlet pipe, avoid the shutdown maintenance and production cost increase caused by blockage. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be further described below with reference to the drawings and embodiments, and the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise that they do not pay creative labor.
[0019] Fig. 1 is the overall shaft schematic diagram of the present application.
[0020] Fig. 2 is the overall side schematic diagram of the present application.
[0021] Fig. 3 is the overall top schematic diagram of the present application.
[0022] The reference signs are:
[0023] 100, ash setting assembly; 110, ash setting hopper; 111, fence;
[0024] 200, ash conveying assembly; 210, first ash inlet pipe; 211, first ash inlet pipeline; 212, second ash inlet pipeline; 213, third ash inlet pipeline; 220, upper air lock; 230, lower air lock; 240, second ash inlet pipe; 241, bending;
[0025] 300, first expansion joint; 400, second expansion joint; 500, third expansion joint. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0027] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0028] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature can be above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature can be below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.
[0029] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.
[0030] The utility model discloses an embodiment such as Figs. 1-3As shown in the figure, it relates to a kind of prevent horizontal flue dust conveying device, including dust settling component 100 and dust conveying component 200, the dust settling component 100 includes dust settling hopper 110;The dust conveying component 200 includes the first ash inlet pipe 210 that the bottom of the dust settling hopper 110 is connected, the first ash inlet pipe 210 is sequentially provided with upper lock air device 220 and lower lock air device 230 from top to bottom, further, the dust in horizontal flue under the action of gravity, into lower dust settling hopper 110, then by dust settling hopper 110 into first ash inlet pipe 210, after passing through upper lock air device 220 and lower lock air device 230 into lower economizer ash bucket, when the dust gravity inside upper lock air device 220 is greater than the weight moment of external counterweight, upper lock air device 220 act, dust enters lower lock air device 230, when the dust gravity inside lower lock air device 230 is greater than the weight moment of external counterweight, lower lock air device 230 act, so that the dust in first ash inlet pipe 210 enters economizer ash bucket, upper and lower lock air device is not simultaneous action, prevent before and after cross, the setting of upper lock air device 220 and lower lock air device 230 ensures the continuity of dust in the conveying process, prevent air channeling when coal dust or ash particle occurs under pressure change, to maintain the smooth flow of powder particle, this guarantees that dust can continuously and uninterruptedly from dust settling hopper 110 through first ash inlet pipe 210 to next link, through the coordination of upper lock air device 220 and lower lock air device 230, effectively prevent dust accumulation and blockage in first ash inlet pipe 210, avoid downtime repair and production cost increase due to blockage.
[0031] In the embodiment, the first ash inlet pipe 210 includes first ash inlet pipe 211, second ash inlet pipe 212 and third ash inlet pipe 213 sequentially arranged from top to bottom, the first ash inlet pipe 211 is detachably connected with the top of the upper lock air device 220, the top and bottom of the second ash inlet pipe 212 are detachably connected with the bottom of the upper lock air device 220 and the top of the lower lock air device 230 respectively, the top of the third ash inlet pipe is detachably connected with the bottom of the lower lock air device 230, further, since first ash inlet pipe 211, second ash inlet pipe 212 and third ash inlet pipe 213 are detachably connected with upper lock air device 220 and lower lock air device 230, flexible adjustment and combination can be carried out according to actual needs, for example, when the nature or conveying amount of dust changes, different size pipes or lock air devices can be replaced to adapt to new working conditions, without large-scale disassembly and replacement of the entire system during maintenance, thereby reducing maintenance cost and production loss caused by downtime maintenance, and detachable connection is also an important advantage for transportation and storage, each component can be stored separately, reducing the occupied space, and the mutual collision and damage between components can also be avoided during transportation.
[0032] In this embodiment, a second ash inlet pipe 240 is provided for connecting the first ash inlet pipe 210 with the ash settling hopper 110. The bottom of the ash settling hopper 110 is inserted into the second ash inlet pipe 240 and connected with the second ash inlet pipe 240 through a first expansion joint 300. The presence of the first expansion joint 300 allows it to compensate for the displacement of the pipeline system caused by temperature changes, settlement or other factors. This ensures that the connection between the ash settling hopper 110 and the second ash inlet pipe 240 remains tight and stable even in the presence of displacement or vibration. By using an expansion joint, the connection between the ash settling hopper 110 and the second ash inlet pipe 240 becomes more flexible. This allows fine-tuning and adjustment of the system as necessary to adapt to different working conditions or conveying requirements.
[0033] In this embodiment, the middle part of the second ash inlet pipe 240 is provided with a bend 241. The end of the second ash inlet pipe 240 away from the ash settling hopper 110 is integrally formed with the first ash inlet pipe 210. The bend 241 can guide the flow direction of the fluid in the pipeline, reducing the formation of vortex and turbulent flow. This helps to reduce the energy loss of the fluid in the pipeline and improves the ash conveying efficiency. The design of the bend 241 and the integral forming makes the structure of the entire ash conveying device more compact, which helps to reduce the occupied area.
[0034] In this embodiment, the top of the first ash inlet pipe 210 is connected with the bottom of the second ash inlet pipe 240, and the bottom of the first ash inlet pipe 210 is connected with the economizer ash hopper (not shown in the figure).
[0035] In this embodiment, a grating 111 is provided at the opening of the ash settling hopper 110. The grating 111 can effectively block oversized materials or impurities from entering the hopper, thereby preventing these materials from causing blockage or damage to the equipment in the hopper or subsequent pipeline. This ensures smooth operation of the ash conveying system. By adjusting the spacing or shape of the grating 111, the flow of materials entering the hopper can be controlled, which helps to ensure that the materials enter the hopper at an appropriate speed and prevents overflow or blockage problems caused by excessive flow.
[0036] In the embodiment, the bottom of the first ash inlet pipe 211 and the top of the second ash inlet pipe 212 are connected with the upper lock hoder 220 through the second expansion joint 400, and the bottom of the second ash inlet pipe 212 and the top of the third ash inlet pipe 213 are connected with the lower lock hoder 230 through the third expansion joint 500. Due to temperature changes, the pipe and the lock hoder may expand and contract, and the expansion joint can compensate for such displacement to ensure that the connection between the pipe and the lock hoder will not loosen or be damaged due to temperature changes. During the ash conveying process, the pipe may be subjected to vibrations and impacts generated by the material flow. The expansion joint can absorb these vibrations and impacts to protect the pipe and the lock hoder from damage. It should be understood that those skilled in the art can make improvements or changes according to the above description, and all such improvements and changes shall fall within the protection scope of the appended claims of the utility model.
Claims
1. A dust conveying device for preventing the deposition of dust in a horizontal flue, characterized in that The application relates to a dust setting assembly (100) and a dust conveying assembly (200). The dust setting assembly (100) comprises a dust setting hopper (110). The dust conveying assembly (200) comprises a first dust conveying pipe (210) communicated with the bottom of the dust setting hopper (110), wherein the first dust conveying pipe (210) is sequentially provided with an upper air lock (220) and a lower air lock (230) from top to bottom.
2. A dust conveying device for preventing the deposition of dust in a horizontal flue according to claim 1, characterized in that The first dust conveying pipe (210) comprises a first dust conveying pipeline (211), a second dust conveying pipeline (212) and a third dust conveying pipeline (213) sequentially arranged from top to bottom, wherein the first dust conveying pipeline (211) is detachably connected with the top of the upper air lock (220), the top and bottom of the second dust conveying pipeline (212) are detachably connected with the bottom of the upper air lock (220) and the top of the lower air lock (230) respectively, and the top of the third dust conveying pipeline is detachably connected with the bottom of the lower air lock (230).
3. A dust conveying apparatus for preventing the deposition of dust in a horizontal flue according to claim 1, wherein The application further comprises a second dust conveying pipe (240) for connecting the first dust conveying pipe (210) with the dust setting hopper (110), wherein the bottom of the dust setting hopper (110) is inserted into the second dust conveying pipe (240) and connected with the second dust conveying pipe (240) through a first expansion joint (300).
4. A dust transport device for preventing the deposition of dust in a horizontal flue according to claim 3, characterized in that The middle part of the second dust conveying pipe (240) is provided with a bending part (241), and the end of the second dust conveying pipe (240) away from the dust setting hopper (110) is integrally formed with the first dust conveying pipe (210).
5. A dust transport device for preventing the deposition of dust in a horizontal flue according to claim 4, characterized in that The top of the first dust conveying pipe (210) is communicated with the bottom of the second dust conveying pipe (240), and the bottom of the first dust conveying pipe (210) is communicated with a dust hopper of a coal economizer.
6. A dust transport apparatus for preventing the deposition of dust in a horizontal flue according to claim 1, wherein The dust setting hopper (110) is provided with a fence (111) at an opening.
7. A dust transport apparatus for preventing the deposition of dust in a horizontal flue according to claim 2, wherein The bottom of the first dust conveying pipeline (211) and the top of the second dust conveying pipeline (212) are connected with the upper air lock (220) through a second expansion joint (400).
8. A dust transport apparatus for preventing the deposition of dust in a horizontal flue according to claim 2, wherein The bottom of the second dust conveying pipeline (212) and the top of the third dust conveying pipeline (213) are connected with the lower air lock (230) through a third expansion joint (500).