Bottom material screening device and boiler

Abstract

The utility model provides a backing material screening device and a boiler, the backing material screening device comprises: a stock bin for storing a backing material, the backing material comprising a plurality of material slags with different diameters; the storage tank is located on one side of the stock bin, and the storage tank is used for storing first material slag with the diameter larger than the first preset diameter; the screening device comprises a screen mesh and a conveying track, the screen mesh is provided with a plurality of screen holes with the diameter being a first preset diameter, the screen mesh is arranged at the feeding port of the stock bin in an openable and closable mode and used for screening first material residues, one end of the conveying track is connected with the screen mesh, and the other end of the conveying track is connected with the storage tank; and the first material slag screened out by the screen is conveyed to the storage tank. The bottom material screening device solves the problem that in the prior art, bottom material screening efficiency is low.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler ignition bottom material sorting equipment, specifically to a bottom material screening device and a boiler. Background Technology

[0002] Fluidized bed combustion technology is one of the most effective technologies for achieving efficient and clean fuel combustion, especially suitable for the combustion of fuels such as coal gangue, coal slime, and biomass fuels. The core of fluidized bed combustion technology is the circulating fluidized bed boiler, which mainly consists of three parts: a combustion system, a gas-solid separation system, and a material circulation system. Therefore, circulating fluidized bed boilers are widely used. For coal-fired circulating fluidized bed boilers, bed ignition is typically used. However, because the bottom material used for ignition usually contains a large amount of fine powder, it easily leads to boiler ignition failure. To reduce ignition failure, large-sized slag is usually manually screened from the bottom material for ignition. However, manual screening is labor-intensive and inefficient. Utility Model Content

[0003] The main purpose of this invention is to provide a bottom material screening device and a boiler to solve the problem of low bottom material screening efficiency in the prior art.

[0004] To achieve the above objectives, this utility model provides a bottom material screening device, comprising: a silo for storing bottom material, the bottom material including various slag particles of different diameters; a storage tank located on one side of the silo for storing first slag particles with a diameter greater than a first preset diameter; and a screening device including a screen and a conveying track. The screen has multiple screen holes with a diameter equal to the first preset diameter. The screen is closable and is installed at the feed inlet of the silo. The screen is used to screen the first slag particles. One end of the conveying track is connected to the screen, and the other end of the conveying track is connected to the storage tank, so that the first slag particles screened by the screen are conveyed to the storage tank.

[0005] Furthermore, the screen switches between a first position and a second position, wherein the first position is when the screen is covered at the feed inlet, and the second position is when the screen opens the feed inlet.

[0006] Furthermore, the screen includes: a screen body having multiple screen holes, a first end of the screen body being pivotally connected to a first sidewall of the feed inlet; and a drive unit connected to a hopper, which is also connected to the screen body and drives the screen body to rotate.

[0007] Furthermore, the drive unit is connected to the second end of the screen body, which is away from the first end.

[0008] Furthermore, the drive unit is connected to the second sidewall of the feed inlet. The second sidewall is positioned opposite to the first sidewall, and the height of the second sidewall is greater than the height of the first sidewall. When the screen is in the first position, the screen body is in contact with the top surface of the second sidewall.

[0009] Furthermore, when the screen is in the first position, the angle between the screen body and the second sidewall is greater than or equal to 40 degrees and less than or equal to 50 degrees.

[0010] Furthermore, the conveying track includes: a conveying cylinder, which is parallel to the height of the silo, and one end of the conveying cylinder is connected to the slag inlet of the storage tank; and a conveying slide, which is set at an angle to the conveying cylinder, with the top of the conveying slide connected to the screen and the bottom of the conveying slide connected to the conveying cylinder.

[0011] Furthermore, the width of the transfer slide gradually decreases from the top to the bottom.

[0012] Furthermore, the bottom material screening device also includes a chain bucket elevator, the discharge port of which is located above the feed inlet of the silo.

[0013] According to another aspect of the present invention, a boiler is provided, including the aforementioned bottom material screening device.

[0014] The present invention provides a bottom material screening device comprising a silo, a storage tank, and a screening device. The silo stores bottom material, which includes various types of slag with different diameters. The storage tank is located on one side of the silo and stores first slag with a diameter greater than a first preset diameter. The screening device includes a screen and a conveyor track. The screen has multiple screen holes with a diameter equal to the first preset diameter. The screen is closable at the inlet of the silo and is used to screen the first slag. One end of the conveyor track is connected to the screen, and the other end is connected to the storage tank, so that the first slag screened by the screen is conveyed to the storage tank.

[0015] Boiler ignition feedstock is typically the slag left after boiler combustion. To reduce the risk of ignition failure, larger slag particles are usually used, while the remaining slag is discarded and sent directly to the silo. A screen is closable at the silo's inlet. When sieving is required, the screen covers the inlet, separating the feedstock and removing the slag particles larger than a preset diameter. These particles are then transported via a conveyor track to a storage tank, effectively improving sieving efficiency. When sieving is not needed, the screen opens the inlet, allowing the feedstock to flow directly into the silo. This effectively controls the amount of slag removed, preventing overfilling of the storage tank. Through this design, the feedstock sieving device effectively separates the slag particles, enabling their reuse, improving resource utilization, and reducing environmental impact. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This diagram shows a structural schematic of the bottom material screening device of an optional embodiment of the present invention from one angle.

[0018] Figure 2 It shows Figure 1 Enlarged view of point P in the middle;

[0019] Figure 3 It shows Figure 1 Schematic diagram showing the positional relationship between the intermediate screening device and the silo and storage tank.

[0020] Figure 4 It shows Figure 1 A schematic diagram showing the positional relationship between the second inspection port of the storage tank and the transfer cylinder.

[0021] The above figures include the following reference numerals:

[0022] 10. Hopper; 11. Feed inlet; 111. First side wall; 112. Second side wall; 12. First inspection port; 20. Storage tank; 21. Second inspection port; 30. Screening device; 31. Screen; 311. Screen body; 312. Drive component; 32. Conveyor track; 321. Conveyor cylinder; 322. Conveyor slide; 40. Chain bucket elevator; 41. Discharge port. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0026] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0027] To address the problem of low efficiency in bottom material screening in existing technologies, this utility model provides a bottom material screening device and a boiler.

[0028] like Figures 1 to 4 As shown, the bottom material screening device includes a silo 10, a storage tank 20, and a screening device 30. The silo 10 is used to store bottom material, which includes various types of slag with different diameters. The storage tank 20 is located on one side of the silo 10 and is used to store first slag with a diameter greater than a first preset diameter. The screening device 30 includes a screen 31 and a conveying track 32. The screen 31 has multiple screen holes with a diameter of the first preset diameter. The screen 31 is closably set at the feed inlet 11 of the silo 10 and is used to screen the first slag. One end of the conveying track 32 is connected to the screen 31, and the other end of the conveying track 32 is connected to the storage tank 20 so that the first slag screened by the screen 31 is conveyed to the storage tank 20.

[0029] The bottom material used for boiler ignition is usually the slag from boiler combustion. To reduce the risk of boiler ignition failure, larger-sized slag from the bottom material is typically used, while the remaining slag is discarded and directly fed into the silo 10. A screen 31 is closable at the feed inlet 11 of the silo 10. When bottom material screening is required, the screen 31 covers the feed inlet 11, screening the bottom material entering the silo 10 and removing the first slag with a diameter larger than a first preset diameter. The screened first slag then enters the storage tank 20 via the conveyor track 32, effectively improving the screening efficiency. When bottom material screening is not required, the screen 31 opens the feed inlet 11, allowing the bottom material to directly enter the silo 10. This effectively controls the amount of first slag screened, preventing an excess of first slag that the storage tank 20 cannot hold. Through the above design, the bottom material screening device of this utility model can effectively separate the first material residue, so that the first material residue can be reused, thereby improving the utilization rate of resources and reducing the impact on the environment.

[0030] This invention, by incorporating a screening device 30, directly filters out the first slag from the bottom material during its entry into the silo 10 and stores it in a storage tank 20. When the boiler needs ignition, the first slag in the storage tank 20 is used directly. The first slag contains less fine powder, which helps improve the ignition success rate. Furthermore, it eliminates the need for manual screening of the bottom material, effectively improving screening efficiency and reducing labor costs.

[0031] In this invention, the diameter of the sieve holes is not specifically limited and can be designed according to actual screening needs.

[0032] In some alternative embodiments, a first inspection port 12 is provided on the silo 10 to facilitate observation of the material level in the silo 10. The first inspection port 12 is located on one side of the feed inlet 11. In addition, a second inspection port 21 is also provided on the top surface of the storage tank 20 to facilitate inspection of the material level of the first slag in the storage tank 20.

[0033] For example, the diameter of the sieve aperture is greater than or equal to 4 mm and less than or equal to 6 mm.

[0034] Specifically, the screen 31 switches between a first position and a second position. In the first position, the screen 31 covers the feed inlet 11, and in the second position, the screen 31 opens the feed inlet 11. When the hopper 10 is placed on a horizontal surface, and the screen 31 is covering the feed inlet 11, the screen 31 can be parallel to the horizontal surface or tilted relative to it. Furthermore, this switching design allows for flexible operation of the screen 31 during screening and cleaning, improving screening efficiency and facilitating daily maintenance and cleaning, making it particularly suitable for continuous production environments.

[0035] For example, when the screen 31 is installed at the feed inlet 11, the screen 31 is parallel to the horizontal plane. The first material residue screened by the screen 31 is on the screen 31. During the process of the screen 31 switching from the first position to the second position, the material residue on the screen 31 flows along the screen 31 into the conveying track 32 and enters the storage tank 20 through the conveying track 32.

[0036] For example, when the screen 31 is installed at the feed inlet 11, the screen 31 is inclined relative to the horizontal plane. During the process of the bottom material entering the silo 10 through the screen 31, the first material residue screened out flows along the inclined direction of the screen 31 into the conveyor track 32 and enters the storage tank 20 through the conveyor track 32.

[0037] It should be noted that the switching of the screen 31 between the first and second positions can be achieved manually or by mechanical equipment, and no specific restrictions are made here.

[0038] like Figures 1 to 3 As shown, the screen 31 includes a screen body 311 and a drive component 312. The screen body 311 has multiple screen holes, and the first end of the screen body 311 is pivotally connected to the first side wall 111 of the feed inlet 11. The drive component 312 is connected to the hopper 10, and is connected to the screen body 311 and drives the screen body 311 to rotate. The drive component 312 is connected to the screen body 311 and drives the screen body 311 to switch between a first position and a second position. The drive component 312 can precisely control the rotation of the screen body 311, realizing the automatic opening and closing of the screen 31 at the feed inlet 11, reducing the need for manual operation, improving the degree of automation, and making it suitable for application in automated production lines.

[0039] In some alternative embodiments, the bottom material screening device further includes a control box, which is electrically connected to the drive component 312 and is used to control the opening and closing of the drive component 312.

[0040] like Figure 1 and Figure 2 As shown, the drive member 312 is connected to the second end of the screen body 311 away from the first end. Positioning the drive member 312 at the second end facilitates the drive member 312 in driving the screen body 311 to rotate along the pivot axis, thus making the screen body 311 more stable during rotation.

[0041] Optionally, the drive unit 312 is a lifting cylinder.

[0042] like Figure 1 and Figure 2As shown, the drive unit 312 is connected to the second side wall 112 of the feed inlet 11. The second side wall 112 is positioned opposite to the first side wall 111, and the height of the second side wall 112 is greater than the height of the first side wall 111. When the screen 31 is in the first position, the screen body 311 is in contact with the top surface of the second side wall 112. By making the height of the second side wall 112 greater than the height of the first side wall 111, the screen body 311 is tilted when the screen 31 is in the first position. When the screen body 311 screens the bottom material, the first material residue rolls to the conveyor track 32 under the action of gravity, reducing the possibility of blockage and improving screening efficiency. This is more suitable for scenarios that process large amounts of bottom material, such as large industrial boilers, and can ensure screening efficiency and stability for long-term continuous operation, reducing production delays caused by equipment blockage.

[0043] Specifically, when the screen 31 is in the first position, the angle between the screen body 311 and the second side wall 112 is greater than or equal to 40 degrees and less than or equal to 50 degrees. This angle between the screen body 311 and the second side wall 112, within the range of 40 to 50 degrees, not only ensures that the first material slag rolls from the screen body 311 onto the conveyor track 32 under gravity, but also prevents the first material slag from rolling too fast and carrying too much fine powder into the conveyor track. Furthermore, it prevents the slag from accumulating on one side of the screen, thus improving the uniformity and efficiency of the screening process.

[0044] like Figures 1 to 3 As shown, the conveying track 32 includes a conveying cylinder 321 and a conveying slide 322. The conveying cylinder 321 is parallel to the height direction of the hopper 10, and one end of the conveying cylinder 321 is connected to the slag inlet of the storage tank 20. The conveying slide 322 is set at an angle to the conveying cylinder 321, with its top end connected to the screen 31 and its bottom end connected to the conveying cylinder 321. The arrangement of the conveying cylinder 321 and the conveying slide 322 defines the movement trajectory of the first slag, enabling the first slag to be quickly and accurately conveyed to the designated position. In addition, the design of the conveying track 32 in this invention utilizes a combination of gravity and mechanical force, enabling the screened first slag to be efficiently conveyed into the storage tank 20, reducing energy consumption and improving conveying efficiency.

[0045] In addition, in order to facilitate the transfer of the first slag on the transfer slide 322, the transfer slide 322 is inclined relative to the horizontal plane, and the higher end of the transfer slide 322 is the top end and the lower end is the bottom end.

[0046] like Figure 3 As shown, the width of the conveyor slide 322 gradually decreases from the top to the bottom. This design allows the first slag to gradually concentrate during the conveying process, facilitating its collection.

[0047] like Figure 1 As shown, the bottom material screening device also includes a chain bucket elevator 40, the discharge port 41 of which is located above the feed port 11 of the silo 10. The addition of the chain bucket elevator enables automatic lifting and conveying of the bottom material, reducing the need for manual handling and improving the overall automation level of the device. This design is particularly suitable for large boilers requiring continuous production, improving production efficiency while reducing labor costs and intensity, providing strong support for large-scale industrial production.

[0048] According to another aspect of this utility model, a boiler is provided, including the aforementioned bottom material screening device. This boiler, by integrating the bottom material screening device, can automatically screen and separate large-diameter first slag, which can be reused. This not only improves combustion efficiency and reduces emissions, significantly benefiting environmental protection by reducing pollution, but also improves screening efficiency.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] It should be noted that the terms "upper" and "lower," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bottom material screening device, characterized in that, include: A silo (10) is used to store bottom material, which includes various types of slag with different diameters. Storage tank (20), the storage tank (20) is located on one side of the silo (10), the storage tank (20) is used to store the first slag with a diameter greater than the first preset diameter; A screening device (30) is provided, comprising a screen (31) and a conveying track (32). The screen (31) has a plurality of screen holes with a diameter equal to the first preset diameter. The screen (31) is closably disposed at the feed inlet (11) of the silo (10). The screen (31) is used to screen the first slag. One end of the conveying track (32) is connected to the screen (31), and the other end of the conveying track (32) is connected to the storage tank (20) so that the first slag screened by the screen (31) is conveyed to the storage tank (20).

2. The bottom material screening device according to claim 1, characterized in that, The screen (31) switches between a first position and a second position, wherein the first position is when the screen (31) covers the feed inlet (11), and the second position is when the screen (31) opens the feed inlet (11).

3. The bottom material screening device according to claim 2, characterized in that, The screen (31) includes: The screen body (311) has a plurality of screen holes, and the first end of the screen body (311) is pivotally connected to the first sidewall (111) of the feed inlet (11). A drive unit (312) is connected to the hopper (10) and is connected to the screen body (311) to drive the screen body (311) to rotate.

4. The bottom material screening device according to claim 3, characterized in that, The drive unit (312) is connected to the second end of the screen body (311) away from the first end.

5. The bottom material screening device according to claim 3, characterized in that, The drive unit (312) is connected to the second side wall (112) of the feed inlet (11). The second side wall (112) is disposed opposite to the first side wall (111). The height of the second side wall (112) is greater than the height of the first side wall (111). When the screen (31) is in the first position, the screen body (311) is in contact with the top surface of the second side wall (112).

6. The bottom material screening device according to claim 5, characterized in that, When the screen (31) is in the first position, the angle between the screen body (311) and the second side wall (112) is greater than or equal to 40 degrees and less than or equal to 50 degrees.

7. The bottom material screening device according to any one of claims 1 to 6, characterized in that, The transmission track (32) includes: A transfer cylinder (321) is parallel to the height direction of the silo (10), and one end of the transfer cylinder (321) is connected to the slag inlet of the storage tank (20). A transfer slide (322) is set at an angle to the transfer cylinder (321). The top end of the transfer slide (322) is connected to the screen (31), and the bottom end of the transfer slide (322) is connected to the transfer cylinder (321).

8. The bottom material screening device according to claim 7, characterized in that, The width of the transfer slide (322) gradually decreases from the top of the transfer slide (322) to the bottom of the transfer slide (322).

9. The bottom material screening device according to any one of claims 1 to 6, characterized in that, The bottom material screening device also includes a chain bucket elevator (40), the discharge port (41) of which is located above the feed inlet (11) of the silo (10).

10. A boiler, characterized in that, The bottom material screening device includes any one of claims 1 to 9.

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