A fly ash separation device
By adopting a meandering airway and flow guiding structure design in the fly ash separation device, combined with textile filter cloth and filter bags, the problems of short airflow residence time and single path are solved, achieving efficient settling of fly ash and stable filtration of filter bags, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGYANG WEIMING ENVIRONMENTAL PROTECTION ENERGY CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-24
AI Technical Summary
Existing fly ash separation devices suffer from poor settling effects due to short airflow residence time and single path, making fly ash prone to escape. Filter-type devices are also prone to clogging, and filter bags wear out quickly, resulting in short service life and high maintenance costs.
The design employs a meandering airway and a flow guiding structure, including an inverted V-shaped reverse airway and a semi-reverse airway, to extend the airflow distance and residence time. Combined with woven filter cloth or non-woven felt filter bags, it utilizes centrifugal force and gravity to promote fly ash settling, and supports the filter bags through a frame structure to prevent deformation.
It improves the initial settling and separation accuracy of fly ash, reduces fly ash escape, extends the service life of filter bags, and reduces maintenance costs.
Smart Images
Figure CN224541338U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fly ash treatment technology, and more specifically to a fly ash separation device. Background Technology
[0002] The short residence time and single path of the airflow in the device result in poor settling effect of large-diameter fly ash, and fly ash is easy to escape with the airflow. In addition, some filter-type separation devices capture fly ash by interception, which is prone to clogging, affecting the filtration effect. A large amount of fly ash directly impacts the filter bag, resulting in rapid wear and short service life of the filter bag, which increases maintenance costs. Utility Model Content
[0003] This invention provides a fly ash separation device, the purpose of which is to increase the fly ash settling effect.
[0004] The above objectives are achieved through the following technical solutions:
[0005] A fly ash separation device includes a housing, an air inlet on the housing, and an air outlet on the opposite side of the air inlet. A flow guiding structure is fixed inside the housing to form a meandering air passage that communicates with the air inlet and the air outlet.
[0006] The outer casing includes a housing, a first guide shell and a second guide shell that are fixedly connected and connected to the left and right ends of the upper side of the housing, respectively. The first guide shell forms the air inlet and the second guide shell forms the air outlet.
[0007] The airflow guiding structure includes a lower airflow guiding structure, which includes a first airflow guide plate, a second airflow guide plate, and a third airflow guide plate to form an inverted V-shaped reverse airflow channel located below the air intake.
[0008] The first guide plate is fixed to the housing, and the second guide plate is fixed to the first guide plate and / or the housing, with the second guide plate located to the right of the first guide plate.
[0009] The outer casing includes a housing and a connecting seat fixed to the bottom of the housing;
[0010] The first guide vane includes a first vertical section at the bottom, a first inclined section connected to the upper end of the first vertical section, and a second vertical section connected to the upper end of the first inclined section.
[0011] The second deflector includes a third vertical section at the bottom and a second inclined section connected to the upper end of the third vertical section. The second inclined section and the first inclined section form the top layer of the reverse airway.
[0012] The third guide vane has a fourth vertical section parallel to the first vertical section, a third inclined section connected to the top of the fourth vertical section and parallel to the first inclined section, a fourth inclined section connected to the top of the third inclined section and parallel to the second inclined section, and a fifth vertical section connected to the bottom of the fourth inclined section; the third guide vane forms the bottom layer of the reversing airway.
[0013] The second vertical section is fixed to the top of the box, and the fifth vertical section is fixed to the bottom of the connecting seat.
[0014] The third guide plate and the connecting seat form a drainage cavity, which is a groove that opens at the bottom and is recessed at the top in the direction of the air inlet.
[0015] The flow guiding structure also includes an upper flow guiding structure, which includes a fourth flow guiding plate and a fifth flow guiding plate fixed to the housing. The fourth flow guiding plate has the same shape as the first flow guiding plate, and the vertical section at the top of the fourth flow guiding plate is shorter than the first vertical section. The fifth flow guiding plate has the same shape as the third flow guiding plate, and the vertical section at the bottom of the fifth flow guiding plate is longer than the fifth vertical section, so as to form a semi-reverse airway that is the same as the left half of the reverse airway. The semi-reverse airway is higher than the reverse airway.
[0016] The outer shell includes a box body and a connecting seat fixed to the bottom of the box body; the connecting seat is equipped with a support frame, and the outer periphery of the support frame is fixed with a filter bag that can be opened up and down; the lower end of the connecting seat is fixed with a funnel-shaped guide box.
[0017] The filter bags are made of woven filter cloth or non-woven felt.
[0018] A valve is installed at the bottom of the flow guide box.
[0019] The beneficial effects of the fly ash separation device of this utility model are as follows:
[0020] The meandering air passage formed by the flow guiding structure inside the shell extends the flow distance and residence time of the flue gas from the inlet to the outlet, allowing the airflow to flow fully within the device, providing sufficient conditions for fly ash settling, and effectively increasing the initial settling amount of fly ash.
[0021] The lower guide structure forms an inverted V-shaped reversing air passage, causing the airflow to flow downwards to the bottom of the box and then reverse direction, prompting some fly ash to settle to the left side of the lower guide structure under inertia; the semi-reversing air passage of the upper guide structure is higher than the reversing air passage, causing the airflow to turn back further at a higher position, increasing the difficulty for fly ash to escape the airflow.
[0022] The third guide plate and the connecting seat form a flow-guiding pit facing the air inlet. This recessed groove structure guides the airflow to swirl downwards. By utilizing the centrifugal force and gravity generated by the swirling airflow, it further promotes the separation and settling of fly ash from the airflow, reducing secondary fly ash re-entrainment.
[0023] The support frame on the connecting seat provides stable support for the filter bags through rings and ribs, preventing deformation or sticking and ensuring the effective filtration area of the filter bags. The filter bags are made of woven filter cloth or non-woven felt, which can perform deep filtration after pre-treatment and sedimentation, further improving the fly ash separation accuracy. The array arrangement of filter bags creates a fly ash isolation zone, making it difficult for fly ash below to escape, which is conducive to its continued downward discharge and separation. Attached Figure Description
[0024] Figure 1 This is a front view of a fly ash separation device according to the present invention;
[0025] Figure 2 This is a side view of the fly ash separation device;
[0026] Figure 3 Cross-sectional view of the fly ash separation unit after removing valves and support feet;
[0027] Figure 4 for Figure 3 A schematic diagram of the cut-off structure of the box and connecting seat in the shown structure;
[0028] Figure 5 This is a schematic diagram of the structure of the first guide vane, the second guide vane, and the third guide vane;
[0029] Figure 6 This is a schematic diagram of the structure of the fourth and fifth guide vanes;
[0030] Figure 7 This is a schematic diagram of the structure of the support frame and filter bag.
[0031] In the diagram: 1-1, housing; 1-2, first guide shell; 1-3, second guide shell; 2-1, first guide plate; 2-2, second guide plate; 2-3, third guide plate; 2-4, fourth guide plate; 2-5, fifth guide plate; 3-1, reverse air passage; 3-2, drainage hole; 4-1, connecting seat; 4-2, support frame; 4-3, filter bag; 5-1, guide housing; 5-2, valve; 5-3, support foot. Detailed Implementation
[0032] A fly ash separation device, reference Figure 1 and 2 The device includes an outer shell, which includes a box 1-1 with a lower opening. The left and right ends of the upper side of the box 1-1 are respectively fixed and connected to a first guide shell 1-2 and a second guide shell 1-3. The connection between the box 1-1 and the first guide shell 1-2 forms an air inlet, and the connection between the box 1-1 and the second guide shell 1-3 forms an air outlet.
[0033] Basic configuration: A connecting seat 4-1 is fixedly connected to the bottom of the box 1-1 to close the lower opening, and a flow guide structure is installed inside the box 1-1 to form a meandering flow channel to extend the distance that the flue gas enters from the inlet and leaves from the outlet, thereby increasing the amount of fly ash settling.
[0034] The flow guiding structure increases the settling rate of fly ash by creating flow channels with both low and high points. Specifically, this includes a lower-positioned flow guiding structure that forms the low point.
[0035] Among them, reference Figures 3 to 5 The lower-mounted flow guide structure includes a first flow guide plate 2-1. The first flow guide plate 2-1 includes a first vertical section at the bottom, a first inclined section fixedly or integrally connected to the upper end of the first vertical section, and a second vertical section fixedly or integrally connected to the upper end of the first inclined section. The first inclined section is lower on the left and higher on the right. The first vertical section, the first inclined section, and the second vertical section are fixed to the housing 1-1. There is a gap between the bottom of the first vertical section and the connecting seat, and the top of the second vertical section is fixed to the top of the housing 1-1.
[0036] The lower guide structure also includes a second guide plate 2-2. The second guide plate 2-2 includes a third vertical section at the bottom and a second inclined section fixed or integrally connected to the upper end of the third vertical section. The second inclined section is higher on the left and lower on the right. The third vertical section is fixed on the box 1-1, and the second inclined section is fixed on the first guide plate 2-1 and the box 1-1.
[0037] The lower-mounted flow guide structure also includes a third flow guide plate 2-3. The third flow guide plate 2-3 includes a fourth vertical section parallel to the first vertical section, a third inclined section fixedly or integrally connected to the top of the fourth vertical section and parallel to the first inclined section, a fourth inclined section fixedly or integrally connected to the top of the third inclined section and parallel to the second inclined section, and a fifth vertical section fixedly or integrally connected to the bottom of the fourth inclined section. The third flow guide plate 2-3 is fixed to the housing 1-1.
[0038] The first guide plate 2-1, the second guide plate 2-2, and the third guide plate 2-3 form an inverted V-shaped reversing air passage 3-1. The third guide plate 2-3 is the bottom layer of the reversing air passage 3-1, while the first guide plate 2-1, the second guide plate 2-2, and the third guide plate 2-3 are the top layer of the reversing air passage 3-1. The reversing air passage 3-1 allows the airflow to enter from the inlet, flow downwards to the bottom of the housing 1-1, and then flow backwards into the reversing air passage 3-1, facilitating the settling of fly ash on the left side of the lower guide structure. Subsequently, the airflow flows downwards and leaves the reversing air passage 3-1, allowing it to rise from the bottom to the inlet of the upper guide structure. During this process, it helps the fly ash to detach from the airflow and settle. The third guide plate 2-3 and the connecting seat 4-1 form a drainage recess 3-2, which is a groove that opens at the bottom and is recessed at the top towards the inlet, allowing the airflow to swirl downwards and promote fly ash settling.
[0039] The upper-mounted flow guiding structure includes a fourth flow guide plate 2-4 and a fifth flow guide plate 2-5 fixed to the housing 1-1. The fourth flow guide plate 2-4 has the same shape as the first flow guide plate 2-1, consisting of six vertical sections and a fifth inclined section fixed to the upper end of the vertical sections. The fifth inclined section is lower on the left and higher on the right, and a seventh vertical section is fixed to the top of the fifth inclined section. The seventh vertical section is shorter than the first vertical section. The fifth flow guide plate 2-5 has the same shape as the third flow guide plate 2-3. The vertical section at the bottom of the fifth flow guide plate 2-5 is longer than the fifth vertical section, forming a semi-reversing airway identical to the left half of the reversing airway 3-1. The semi-reversing airway is higher than the reversing airway 3-1. This causes the airflow to swirl in the area to the left of the fourth flow guide plate 2-4, promoting fly ash settling. The inlet of the semi-reversing airway faces upwards, increasing the difficulty for fly ash to further exit the semi-reversing airway. After leaving the semi-reversing airway, the airflow is at a higher position in the next area.
[0040] Enhanced configuration: As needed, the number of lower and upper airflow guide structures can be repeatedly increased sequentially from left to right. Figure 3 and 4 The example shows a lower guide structure, an upper guide structure, and a second lower guide structure.
[0041] Alternatively, evenly distributed circular holes can be made on the connecting seat 4-1, with a support 4-2 placed in each hole. The top and bottom of the support 4-2 are circular ring structures, and ribs are evenly distributed around the circumference between the two circular ring structures. The upper and lower ends of the ribs are fixed to the two circular ring structures respectively. The upper ring, i.e., the top of the support 4-2, is fixed to the connecting seat 4-1. Filter bags 4-3 with vertical conduction are fitted and fixed on the outer circumference of the support 4-2, i.e., on the ribs. A funnel-shaped flow guide box 5-1 is fixed to the lower end of the connecting seat 4-1, thereby reducing the upward flow of fly ash and facilitating the downward retention and separation of fly ash. The filter bags 4-3 are made of woven filter cloth or non-woven felt. During operation, the bottom of the flow guide box 5-1 can be closed, for example, by installing a hinged door that can be opened and closed. The door can be an existing product, and the specific installation method can be based on the manufacturer's instructions without restriction. The flow guide box 5-1 is opened to recover fly ash when needed. A valve 5-2 can also be installed at the bottom of the flow guide box 5-1, preferably a plate valve. Support feet 5-3 can be fixed to the bottom of the flow guide box 5-1. Welding is preferred for the above fixing method, or a right-angle piece, plate, and bolt connection can be used to connect the two corners or a spliced structure.
Claims
1. A fly ash separation device, characterized in that, It includes an outer casing with an air inlet and an air outlet on the opposite side of the air inlet. A flow guide structure is fixed inside the outer casing to form a meandering air passage that communicates with the air inlet and the air outlet.
2. The fly ash separation device according to claim 1, characterized in that the outer shell... Includes a housing (1-1), and a first guide shell (1-2) and a second guide shell (1-3) fixedly connected and connected to the left and right ends of the upper side of the housing (1-1), respectively. The first guide shell (1-2) forms the air inlet, and the second guide shell (1-3) forms the air outlet.
3. The fly ash separation device according to claim 1, characterized in that the flow guide... The structure includes a lower guide structure, which includes a first guide plate (2-1), a second guide plate (2-2), and a third guide plate (2-3) to form an inverted V-shaped reverse air passage (3-1) located below the air inlet.
4. The fly ash separation device according to claim 3, characterized in that, The first guide plate (2-1) is fixed to the housing (1-1), and the second guide plate (2-2) is fixed to the first guide plate (2-1) and / or the housing (1-1). The second guide plate (2-2) is located to the right of the first guide plate (2-1).
5. The fly ash separation device according to claim 3, characterized in that the outer shell... Includes a housing (1-1) and a connecting seat (4-1) fixed to the bottom of the housing (1-1); The first guide vane (2-1) includes a first vertical section at the bottom, a first inclined section connected to the upper end of the first vertical section, and a second vertical section connected to the upper end of the first inclined section. The second guide plate (2-2) includes a third vertical section at the bottom and a second inclined section connected to the upper end of the third vertical section. The second inclined section and the first inclined section form the top layer of the reverse airway (3-1). The third guide vane (2-3) has a fourth vertical section parallel to the first vertical section, a third inclined section connected to the top of the fourth vertical section and parallel to the first inclined section, a fourth inclined section connected to the top of the third inclined section and parallel to the second inclined section, and a fifth vertical section connected to the bottom of the fourth inclined section; the third guide vane (2-3) forms the bottom layer of the reverse airway (3-1). The second vertical section is fixed to the top of the housing (1-1), and the fifth vertical section is fixed to the bottom of the connecting seat (4-1).
6. The fly ash separation device according to claim 3, characterized in that, The third guide plate (2-3) and the connecting seat (4-1) form a drainage hole (3-2), which is a groove that is open at the bottom and recessed at the top in the direction of the air inlet.
7. The fly ash separation device according to claim 5, characterized in that the flow guide... The structure also includes an upper-mounted flow guide structure, which includes a fourth flow guide plate (2-4) and a fifth flow guide plate (2-5) fixed to the housing (1-1). The fourth flow guide plate (2-4) has the same shape as the first flow guide plate (2-1), and the vertical section at the top of the fourth flow guide plate (2-4) is shorter than the first vertical section. The fifth flow guide plate (2-5) has the same shape as the third flow guide plate (2-3), and the vertical section at the bottom of the fifth flow guide plate (2-5) is longer than the fifth vertical section, so as to form a semi-reverse airway that is the same as the left half of the reverse airway (3-1). The semi-reverse airway is higher than the reverse airway (3-1).
8. The fly ash separation device according to claim 1, characterized in that the outer shell... Includes a housing (1-1), a connecting seat (4-1) fixed to the bottom of the housing (1-1); a support frame (4-2) is distributed and fixed on the connecting seat (4-1), a filter bag (4-3) with vertical and horizontal conduction is fixed on the outer periphery of the support frame (4-2), and a bucket-shaped flow guide box (5-1) is fixed to the lower end of the connecting seat (4-1).
9. The fly ash separation device according to claim 8, characterized in that, The filter bag (4-3) is made of woven filter cloth or non-woven felt.
10. The fly ash separation device according to claim 8, characterized in that, A valve (5-2) is installed at the bottom of the flow guide box (5-1).