Fly ash grading recovery processing device

Abstract

The utility model discloses a fly ash grading recovery processing device, which relates to the technical field of waste recovery processing and comprises a main body shell, a plurality of screening assemblies are sequentially arranged in the main body shell from top to bottom, and each screening assembly comprises a screening plate, a material receiving box, a material pushing mechanism and a rake screening mechanism. The screening plate comprises a filter screen and a vibrating screen bed arranged below the filter screen, the receiving box is arranged below the screening plate, the rake screening mechanism is arranged on the filter screen and used for reciprocating to scrape and screen coal ash on the filter screen, and the pushing mechanism is arranged on the filter screen and used for pushing the coal ash on the filter screen to the next layer of filter screen. The hole diameters of the filter screens in the screening assemblies are sequentially increased from top to bottom, a bottom material box is arranged below the lowermost material receiving box, and the material pushing mechanism in the lowermost screening assembly is used for pushing fly ash into the bottom material box. According to the utility model, the screening efficiency and effect can be improved, and the problem of dust raising is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste material recovery and treatment, in particular to a fly ash classification recovery and treatment device. Background Art

[0002] Fly ash, typically the fine dust captured from the flue gases produced by coal combustion, is a major solid waste product from coal-fired power plants. The high demand for electricity leads to the generation of large quantities of fly ash during coal-fired power generation. If untreated, this fly ash can cause air pollution and dust problems. If discharged into waterways, it can also lead to siltation, posing potential environmental and biohazardous hazards. Therefore, recycling and reusing fly ash as a resource is crucial. Fly ash produced by the natural combustion of coal has varying particle sizes and requires screening and grading before it can be used in a variety of applications, including concrete, cement, building materials, chemicals, and agriculture. Screening equipment plays a key role in this process, with vibrating screens being the most common. Vibrating screens come in two types: disc and plate. Plate vibrating screens are the most common and particularly suitable for fly ash screening.

[0003] Existing plate vibrating screens have a relatively simple structure, relying primarily on mechanical vibration to screen materials. However, fly ash screening differs from general materials in several key aspects. First, single-layer plate vibrating screens typically have only one size of sieve aperture, suitable for simple two-stage screening, but with relatively low grading accuracy. Multi-layer plate vibrating screens, on the other hand, utilize multiple sieve plates to meet multi-stage screening requirements. However, for fine powders like fly ash, the process of dropping material layer by layer onto the sieve plates can generate significant dust pollution, significantly impacting the work environment. Furthermore, because fly ash is fine and light, it easily moves with air, compromising its ability to pass through the sieve apertures, thus impacting screening effectiveness. Second, whether using a single-layer or multi-layer plate vibrating screen, material is randomly introduced during the screening process and spreads across the sieve plates as the vibrations progress. To ensure effective screening, the material introduction rate and amount must be controlled. However, large-scale material introduction often results in uneven material distribution, even resulting in thick accumulation in certain areas, further reducing screening efficiency and effectiveness. Finally, fly ash's inherent characteristics present additional challenges during screening. Due to its light weight and small size, it is easily affected by vibration and air flow, resulting in uneven distribution during screening and, in turn, affecting screening efficiency. Furthermore, potential adhesion and cohesion between fly ash particles further complicates their passage through the sieve apertures, potentially leading to clogging and further complicating the screening process. Utility Model Content

[0004] The purpose of the utility model is to provide a fly ash classification recovery and treatment device to solve the problems existing in the above-mentioned prior art, improve the screening efficiency and effect, and avoid the occurrence of dust problems.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a fly ash grading and recovery processing device, comprising a main body shell, wherein a plurality of screening components are arranged in sequence from top to bottom in the main body shell, the screening component comprises a screening plate, a material receiving box, a material pushing mechanism and a nail rake screening mechanism, the screening plate comprises a filter screen and a vibrating screen bed arranged under the filter screen, the material receiving box is arranged below the screening plate, the nail rake screening mechanism is arranged on the filter screen and is used for reciprocating movement to scrape the fly ash on the filter screen, the material pushing mechanism is arranged on the filter screen and is used for pushing the fly ash on the filter screen to the filter screen of the next layer, the aperture of the filter screen in each of the screening components increases from top to bottom, a bottom material box is provided below the lowest material receiving box, and the material pushing mechanism in the lowest screening component is used for pushing the fly ash into the bottom material box.

[0007] Preferably, three screening components are sequentially arranged in the main body shell from top to bottom.

[0008] Preferably, the pushing mechanism includes a pushing plate and a pushing cylinder, the pushing plate is arranged on the filter screen, and the piston rod of the pushing cylinder extends into the main body shell and is connected with the pushing plate.

[0009] Preferably, the side of the main shell is provided with a first socket corresponding to each of the nail rake screening mechanisms, and the nail rake screening mechanism is inserted into the main shell through the first socket. The nail rake screening mechanism includes a nail rake screening brush, a material baffle plate and a reciprocating drive device, and the nail rake screening brush is slidably arranged in the U-shaped material baffle plate and connected to the reciprocating drive device.

[0010] Preferably, the side surface of the main shell is provided with second sockets corresponding to the respective material receiving boxes, and the material receiving boxes are inserted into the main shell through the second sockets.

[0011] Preferably, a third socket corresponding to the bottom material box is provided on the side of the main shell, and the bottom material box is inserted into the main shell through the third socket.

[0012] Preferably, a feeding port is provided on the top of the main shell for feeding materials onto the uppermost screening plate.

[0013] Preferably, the reciprocating drive device includes a reciprocating transverse pushing assembly, which includes a transverse pushing frame and a transverse pushing cylinder. The frame surface of the transverse pushing frame is arranged parallel to the upper surface of the filter screen. The transverse pushing frame is slidably arranged on the side plates on both sides of the material baffle and is connected to the transverse pushing cylinder. The nail rake and screen brush is connected to the transverse pushing frame, and the transverse pushing cylinder drives the transverse pushing frame to slide and thereby drives the nail rake and screen brush to move back and forth.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The fly ash grading and recovery processing device provided by the utility model has a compact structure by arranging multiple screening components in sequence from top to bottom in the main body shell, which meets the needs of multi-stage screening and greatly avoids the problem of large amounts of dust generated in the process of screening and dropping fly ash layer by layer by the plate vibrating screen with a multi-layer screen plate structure; through the reciprocating movement of the rake screening mechanism, during the screening process, the fly ash can be fully dispersed, so that the material is dispersed and spread out to avoid local accumulation, and the agglomeration effect of the fly ash is greatly weakened, the sieve holes can be cleaned synchronously, and the material is promoted to pass through the sieve holes quickly. In addition, the residence and screening time of the fly ash in a single screening component is extended, the adequacy of the screening is improved, the repeated screening of the material is avoided, and the processing efficiency and effect of the fly ash screening and recovery are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a fly ash classification recovery and treatment device in an embodiment of the present utility model;

[0018] Figure 2 This is a flow chart of screening using the fly ash classification recovery and processing device in the embodiment.

[0019] In the figure: 1-main body shell, 2-screening plate, 3-material receiving box, 4-pushing mechanism, 5-harrow screening mechanism, 6-filter screen, 7-vibrating screen bed, 8-bottom material box, 9-push plate, 10-pushing cylinder, 11-harrow screening brush, 12-material blocking plate, 13-feeding port. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The purpose of the utility model is to provide a fly ash classification recovery and treatment device to solve the problems existing in the prior art, improve the screening efficiency and effect, and avoid the occurrence of dust problems.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] like Figure 1-Figure 2 As shown, this embodiment provides a fly ash grading and recovery processing device, including a main body shell 1, and a plurality of screening components are arranged in sequence from top to bottom in the main body shell 1. Specifically, in this embodiment, three screening components are arranged in sequence from top to bottom in the main body shell 1, namely an upper screening component, a middle screening component and a lower screening component, the screening component includes a screening plate 2, a material receiving box 3, a pushing mechanism 4 and a rake screening mechanism 5, the screening plate 2 includes a filter screen 6 and a vibrating screen bed 7 arranged under the filter screen 6, the material receiving box 3 is arranged below the screening plate 2, the rake screening mechanism 5 is arranged on the filter screen 6, and is used for reciprocating to scrape the fly ash on the filter screen 6, the pushing mechanism 4 is arranged on the filter screen 6, and is used for pushing the fly ash on the filter screen 6 to the filter screen 6 of the next layer, the aperture of the filter screen 6 in each screening component increases from top to bottom, and a bottom material box 8 is provided below the lowest material receiving box 3, and the pushing mechanism 4 in the lowest screening component is used for pushing the fly ash into the bottom material box 8.

[0024] When in use, the fly ash material is put onto the screening plate 2 on the uppermost layer, and is screened step by step by the screening components on each layer. When the upper screening component is screening, the fly ash on the filter screen 6 is scraped and screened by the reciprocating movement of the rake screening mechanism 5, and is screened in combination with the vibration of the vibrating screen bed 7. The vibrating screen bed 7 is the main structure of the existing plate vibrating screen, which can perform vibration screening. Its specific structure is not elaborated here. After the screening of the upper screening component is completed, the fly ash screened falls into the receiving box 3 below the screening plate 2 of the upper layer, and the fly ash remaining on the screening plate 2 is pushed by the pushing mechanism 4 to the screening plate 2 of the middle layer. Then, the rake screening mechanism 5 of the middle layer moves back and forth to scrape and screen, and is screened in combination with the vibration of the vibrating screen bed 7. After the middle screening is completed, the fly ash screened falls into the receiving box 3 below the screening plate 2 of the middle layer, and the fly ash remaining on the screening plate 2 is pushed by the pushing mechanism 4 to the screening plate 2 of the lower layer, and so on. After the screening of the lower screening assembly is completed, the fly ash remaining on the screening plate 2 is pushed into the bottom material box 8 by the pushing mechanism 4.

[0025] This device has a compact structure by arranging multiple screening components from top to bottom in the main shell 1, which meets the needs of multi-stage screening. At the same time, it greatly avoids the problem of large amounts of dust that occurs in the process of screening and dropping fly ash layer by layer by the plate vibrating screen with a multi-layer screen plate structure; through the reciprocating movement of the rake screening mechanism 5, during the screening process, the fly ash can be fully dispersed, so that the material is spread out and flat to avoid local accumulation, and the agglomeration effect of the fly ash is greatly weakened, the sieve holes can be cleaned synchronously, and the material can be promoted to pass through the sieve holes quickly. In addition, the residence and screening time of the fly ash in a single screening component is extended, the adequacy of the screening is improved, the repeated screening of the material is avoided, and the processing efficiency and effect of the fly ash screening and recovery are greatly improved.

[0026] In this embodiment, the pushing mechanism 4 includes a push plate 9 and a push cylinder 10. The push plate 9 is arranged on the filter screen 6. The piston rod of the push cylinder 10 extends into the main housing 1 and is connected to the push plate 9. The push plate 9 is moved in translation by the extension and retraction of the piston rod of the push cylinder 10, thereby pushing the material into the lower layer.

[0027] In this embodiment, the side of the main body shell 1 is provided with a first socket corresponding to each spike rake screening mechanism 5, and the spike rake screening mechanism 5 is inserted into the main body shell 1 through the first socket. The spike rake screening mechanism 5 includes a spike rake screening brush 11, a material baffle 12 and a reciprocating drive device. The spike rake screening brush 11 is slidably set in the U-shaped material baffle 12 and is connected to the reciprocating drive device. Before screening, the spike rake screening mechanism 5 is inserted into the main body shell 1 so that the square structure formed by the spike rake screening brush 11 and the U-shaped material baffle 12 surrounds the filter screen 6. Afterwards, the spike rake screening brush 11 is driven by the reciprocating drive device to move back and forth inside the U-shaped material baffle 12 to prevent the material to be screened from falling onto the lower screening plate 2 in advance.

[0028] In this embodiment, the main housing 1 has a side surface provided with a second socket corresponding to each receiving box 3, through which the receiving box 3 is inserted into the main housing 1. The main housing 1 also has a side surface provided with a third socket corresponding to the bottom box 8, through which the bottom box 8 is inserted into the main housing 1. This facilitates the removal and placement of each receiving box 3 and the bottom box 8, thereby facilitating the collection of the screened fly ash.

[0029] In this embodiment, a feeding port 13 is provided on the top of the main housing 1 for feeding materials onto the uppermost screening plate 2 to facilitate the feeding of fly ash materials.

[0030] In this embodiment, the reciprocating drive device includes a reciprocating transverse pushing assembly, which includes a transverse pushing frame and a transverse pushing cylinder. The frame surface of the transverse pushing frame is arranged parallel to the upper surface of the filter 6. The transverse pushing frame is slidably arranged on the side panels on both sides of the material baffle 12 and is connected to the transverse pushing cylinder. The spike rake screening brush 11 is connected to the transverse pushing frame, and the transverse pushing cylinder drives the transverse pushing frame to slide and thereby drives the spike rake screening brush 11 to move back and forth.

[0031] Adopt this device to carry out fly ash screening, specifically comprise the following steps:

[0032] (1) Start the device and put it into working operation state;

[0033] (2) feeding fly ash into the device through external conveying equipment;

[0034] (3) Fly ash is screened step by step through each screening component;

[0035] (4) The obtained fly ash of each level is transferred and transported respectively;

[0036] (5) The obtained fly ash of each level is piled up and stored separately.

[0037] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A fly ash classification recovery and treatment device, characterized by: It includes a main body shell, in which a plurality of screening components are arranged in sequence from top to bottom, the screening components include a screening plate, a material receiving box, a pushing mechanism and a nail rake screening mechanism, the screening plate includes a filter screen and a vibrating screen bed arranged under the filter screen, the material receiving box is arranged below the screening plate, the nail rake screening mechanism is arranged on the filter screen, and is used for reciprocating movement to scrape the fly ash on the filter screen, the pushing mechanism is arranged on the filter screen, and is used for pushing the fly ash on the filter screen to the filter screen of the next layer, the aperture of the filter screen in each of the screening components increases from top to bottom, a bottom material box is provided below the lowest material receiving box, and the pushing mechanism in the lowest screening component is used for pushing the fly ash into the bottom material box.

2. The fly ash classification recovery and treatment device according to claim 1, characterized in that: Three screening components are arranged in sequence from top to bottom in the main body shell.

3. The fly ash classification recovery and treatment device according to claim 1, characterized in that: The pushing mechanism includes a pushing plate and a pushing cylinder. The pushing plate is arranged on the filter screen. The piston rod of the pushing cylinder extends into the main body shell and is connected with the pushing plate.

4. The fly ash classification recovery and treatment device according to claim 1, characterized in that: The side of the main shell is provided with a first socket corresponding to each of the nail rake screening mechanisms, and the nail rake screening mechanism is inserted into the main shell through the first socket. The nail rake screening mechanism includes a nail rake screening brush, a material baffle plate and a reciprocating drive device. The nail rake screening brush is slidably arranged in the U-shaped material baffle plate and is connected to the reciprocating drive device.

5. The fly ash classification recovery and treatment device according to claim 4, characterized in that: The side surface of the main shell is provided with second sockets corresponding to the respective material receiving boxes, and the material receiving boxes are inserted into the main shell through the second sockets.

6. The fly ash classification recovery and treatment device according to claim 5, characterized in that: A third socket corresponding to the bottom material box is provided on the side of the main shell, and the bottom material box is inserted into the main shell through the third socket.

7. The fly ash classification recovery and treatment device according to claim 1, characterized in that: A feeding port is provided on the top of the main shell for feeding materials onto the uppermost screening plate.

8. The fly ash classification recovery and treatment device according to claim 4, characterized in that: The reciprocating drive device includes a reciprocating transverse pushing assembly, which includes a transverse pushing frame and a transverse pushing cylinder. The frame surface of the transverse pushing frame is arranged parallel to the upper surface of the filter screen. The transverse pushing frame is slidably arranged on the side plates on both sides of the material baffle and is connected to the transverse pushing cylinder. The spike rake and screening brush is connected to the transverse pushing frame, and the transverse pushing cylinder drives the transverse pushing frame to slide and thereby drives the spike rake and screening brush to move back and forth.

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