Rotary shell type large fly ash catching and collecting device

Abstract

The invention provides a rotary shell type large fly ash catching and collecting device which comprises a plurality of large fly ash catching units, the large fly ash catching units are arranged in a transverse horizontal flue, and an included angle is formed between the central axis of each large fly ash catching unit and the central axis of the horizontal flue. And a large fly ash collecting unit is arranged at the bottom of each large fly ash capturing unit. The large fly ash catching unit comprises a rotating shell type large fly ash catcher, grid catching holes are formed in the side wall of the rotating shell type large fly ash catcher, and the rotating shell type large fly ash catcher can rotate. The large fly ash collecting unit comprises fly ash collecting hoppers, the fly ash collecting hoppers are in one-to-one correspondence with the rotary shell type large fly ash trappers and are communicated with the rotary shell type large fly ash trappers, and the tops of the fly ash collecting hoppers are fixedly mounted outside the side wall of the bottom of the horizontal flue. And fly ash bins are further mounted at the bottoms of the plurality of fly ash collecting hoppers. The device provided by the invention ensures that the large fly ash falls into the fly ash bin by virtue of the action of centrifugal force and gravity while intercepting the large fly ash, so that the blockage and abrasion of the SCR denitration system and the air pre-heater are prevented from the source.

Description

Technical Field

[0001] The invention belongs to the technical field of coal-fired boiler flue gas systems, relates to large fly ash, and particularly relates to a rotary shell type large fly ash capturing and collecting device. Background Art

[0002] my country's energy consumption has long been centered on coal. Coal-fired boilers, key equipment for power generation, have become the mainstream choice for flue gas denitrification from large coal-fired boilers due to their high denitrification efficiency (over 90%) and proven reliability. Currently, the vast majority of SCR denitrification systems utilize a high-ash configuration (pre-denitrification dust collector), with flue gas entering the reactor without dust removal. Under operating conditions such as frequent coal type switching, deep peak load regulation, and changes in the combustion dynamics, coal-fired boilers are prone to producing millimeter-sized fly ash. These large fly ash particles are often larger than the pores of the denitrification catalyst, causing clogging of the catalyst and severely reducing the denitrification efficiency of the SCR denitrification system.

[0003] To compensate for denitrification efficiency, power plant technicians are forced to over-inject ammonia. This excess ammonia forms ammonium bisulfate at the cold end of the air preheater, clogging the heat storage fins and reducing heat transfer efficiency. Furthermore, large fly ash particles scour the catalyst surface and the heat storage fins, shortening the life of environmental protection equipment and resulting in a waste of resources.

[0004] Therefore, improvements to existing technologies are needed, and a large fly ash capture device is urgently needed. This device must effectively intercept large fly ash particles in flue gas, preventing clogging and wear of the SCR denitrification system and air preheater at the source, thereby meeting the social demand for deep energy conservation and environmental protection of coal-fired boiler flue gas. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a swirl shell large fly ash capture and collection device to solve the technical problem in the existing technology that it is difficult to achieve both intercepting large fly ash in flue gas and improving the service life of the SCR denitrification system and air preheater.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A rotary shell type large fly ash capture and collection device includes multiple identical large fly ash capture units, which are arranged in parallel and evenly inside a horizontal flue arranged along the transverse direction. There is an angle between the central axis of each large fly ash capture unit and the central axis of the horizontal flue, and a large fly ash collection unit is also provided at the bottom of each large fly ash capture unit.

[0008] The large fly ash capturing unit comprises a swirl shell type large fly ash catcher, a plurality of grid capturing holes are opened on the side wall of the swirl shell type large fly ash catcher, and the swirl shell type large fly ash catcher can also rotate around its own central axis.

[0009] The large fly ash collection unit includes a fly ash collection bucket, which corresponds one-to-one to the swirl shell type large fly ash catcher and is connected to each other. The interior of the fly ash collection bucket is hollow and open at both axial ends. The axial top of the fly ash collection bucket is fixedly mounted on the outer surface of the bottom side wall of the horizontal flue.

[0010] A fly ash bin is also installed at the axial bottom of the plurality of fly ash collecting buckets, and the fly ash bin can be communicated with the axial bottom of the plurality of fly ash collecting buckets at the same time.

[0011] The present invention also has the following technical features:

[0012] Specifically, multiple large swirl shell fly ash catchers are evenly arranged longitudinally inside the horizontal flue, the cross-section of each large swirl shell fly ash catcher is spiral, the central axis of each large swirl shell fly ash catcher is arranged vertically, and the axial bottom of each large swirl shell fly ash catcher also extends vertically to the outside of the bottom side wall of the horizontal flue.

[0013] The plurality of square capture holes are evenly arranged in an array on the side wall of the rotary shell type large fly ash catcher.

[0014] Specifically, the swirl shell type large fly ash catcher is also integrated with a fixed rotating shaft, the fixed rotating shaft and the swirl shell type large fly ash catcher correspond one to one, the central axis of the fixed rotating shaft and the central axis of the swirl shell type large fly ash catcher are collinear, and the axial length of the fixed rotating shaft is greater than or equal to the vertical height of the swirl shell type large fly ash catcher.

[0015] The axial top of the fixed shaft is also coaxially provided with a catcher top support, the axial bottom of the catcher top support is rotatably connected to the axial top of the fixed shaft, and the axial top of the catcher top support is fixedly connected to the inner side of the top side wall of the horizontal flue.

[0016] The axial bottom of the fixed shaft is also coaxially provided with a catcher bottom bracket, the axial top of the catcher bottom bracket is rotatably connected to the axial bottom of the fixed shaft, and the axial bottom of the catcher bottom bracket is fixedly connected to the inner side of the side wall of the fly ash collection bucket.

[0017] Specifically, the fly ash collecting hopper is in the shape of a funnel, and vertically comprises an integrally arranged funnel cone and a funnel neck in sequence from top to bottom.

[0018] The funnel cone is coaxially arranged with the swirl shell large fly ash catcher, and the axial top of the funnel cone is sealed and fixedly connected to the outer side of the bottom side wall of the horizontal flue. The maximum cross-sectional area of ​​the funnel cone is greater than the maximum cross-sectional area of ​​the swirl shell large fly ash catcher.

[0019] Specifically, a fly ash valve is further installed on the funnel neck. The fly ash valve corresponds to the funnel neck one-to-one, and the fly ash valve can connect or isolate the funnel neck and the fly ash bin.

[0020] Specifically, the axial bottoms of the plurality of funnel necks are sealed with the fly ash bin and are in communication with each other.

[0021] A weight sensor is also provided in the fly ash bin, and the bottom or side wall of the fly ash bin can be opened or closed.

[0022] Specifically, the material of the rotary shell type large fly ash catcher includes 316L stainless steel or 2205 stainless steel.

[0023] Specifically, the fly ash bin is made of Q345 low alloy steel.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] (I) The device of the present invention combines a swirl shell large fly ash catcher with a fixed rotating shaft, which can effectively realize the rotation of the swirl shell large fly ash catcher with the help of the flow of flue gas; under the premise of ensuring the interception of large fly ash, it can also effectively use the effects of centrifugal force and gravity to ensure that large fly ash falls into the fly ash collection bucket in time and finally falls into the fly ash bin through the fly ash valve, thereby preventing the blockage and wear of the SCR denitrification system and the air preheater from the source.

[0026] (II) The device of the present invention utilizes flue gas as a power source for the rotation of the swirl shell type large fly ash catcher, and achieves self-cleaning of the swirl shell type large fly ash catcher without the aid of electrical energy. The device is simple and has strong adaptability, so that the device can operate stably for a long time.

[0027] (III) The cross-section of the rotary shell type large fly ash catcher of the present invention is in the shape of a spiral curve, which is conducive to collecting large fly ash in the flue gas.

[0028] (IV) The device of the present invention utilizes the centrifugal force generated by the rotating shell-type large fly ash catcher during rotation, as well as the changes in the internal flow field of the rotating shell-type large fly ash catcher caused by the rotation, to avoid the blockage of the grid capture holes that may be caused by large fly ash, thereby achieving self-cleaning of the device; at the same time, the device of the present invention can efficiently capture large fly ash, protecting the downstream SCR denitrification equipment and air preheater from the source, and has good energy-saving and environmental protection benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a perspective schematic diagram of the three-dimensional overall structure of the device in the present invention.

[0030] Figure 2 It is a perspective schematic diagram of the main structure of the device in the present invention.

[0031] Figure 3 It is a perspective schematic diagram of the left side structure of the device in the present invention.

[0032] Figure 4 Schematic diagram of the perspective view of the top structure of the device of the present invention.

[0033] The meanings of the numbers in the figure are: 1-large fly ash capture unit, 2-large fly ash collection unit, 3-horizontal flue.

[0034] 101-swirl shell type large fly ash catcher, 102-grid catch hole, 103-fixed rotating shaft, 104-catcher top support, 105-catcher bottom support.

[0035] 201-fly ash collection hopper, 202-fly ash bin, 203-fly ash valve, 204-weight sensor.

[0036] 20101-funnel cone, 20102-funnel neck.

[0037] The specific contents of the present invention are further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] It should be noted that, unless otherwise specified, all systems, equipment, components and materials in the present invention adopt the systems, equipment, components and materials commonly known in the art in the prior art. For example, the SCR denitrification system adopts the known SCR denitrification system, the air preheater adopts the known air preheater, the weight sensor adopts the known weight sensor, the fly ash valve adopts the known fly ash valve, 316L stainless steel adopts the known 316L stainless steel, 2205 stainless steel adopts the known 2205 stainless steel, and Q345 low alloy steel adopts the known Q345 low alloy steel.

[0039] The technical concept behind this invention is that, without the device, a 600MW coal-fired boiler, due to long-term peak load regulation, experiences large load fluctuations and high frequency, and combustion easily produces large fly ash particles. This phenomenon presents two problems: First, large fly ash easily clogs the SCR denitrification system. To ensure environmental compliance, technicians must inject excessive ammonia, which in turn clogs the air preheater. Second, large fly ash particles scour the catalyst surface and air preheater heat storage fins, shortening the life of environmental protection equipment and resulting in a waste of resources. Therefore, a device is needed to capture large fly ash in flue gas at the source. The device in the present invention is to install a spiral-shaped cross-section swirl shell type large fly ash catcher 101 in the horizontal flue 3. Driven by the flue gas in the horizontal flue 3, the swirl shell type large fly ash catcher 101 can rotate around the fixed rotating shaft 103; when the large fly ash in the flue gas is blocked by the capture hole, due to the rotation of the swirl shell type large fly ash catcher 101, the large fly ash will fall into the fly ash bin 202 in the large fly ash collection unit 2 under the action of centrifugal force and gravity, and finally realize the capture and collection of the large fly ash.

[0040] In the present invention, a plurality refers to one or more than one.

[0041] In the present invention, the OXYZ coordinate system is a three-dimensional rectangular coordinate system, wherein the X axis is horizontal and points to the right; the Y axis is vertical and points to the front; and the Z axis is vertical and points to the top.

[0042] In the present invention, large fly ash refers to fly ash having a particle size greater than or equal to millimeter level.

[0043] In accordance with the above technical solution, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0044] Example:

[0045] This embodiment provides a rotary shell type large fly ash capture and collection device, such as Figure 1 As shown, it includes multiple identical large fly ash capture units 1, and the multiple large fly ash capture units 1 are arranged in parallel and evenly inside the horizontal flue 3 arranged along the transverse direction. There is an angle between the central axis of each large fly ash capture unit 1 and the central axis of the horizontal flue 3, and a large fly ash collection unit 2 is also provided at the bottom of each large fly ash capture unit 1.

[0046] like Figure 1 As shown, the large fly ash capture unit 1 includes a swirl shell type large fly ash catcher 101, a plurality of grid capture holes 102 are opened on the side wall of the swirl shell type large fly ash catcher 101, and the swirl shell type large fly ash catcher 101 can also rotate around its own central axis.

[0047] The large fly ash collection unit 2 includes a fly ash collection hopper 201, which corresponds one-to-one to the swirl shell type large fly ash catcher 101 and is interconnected. The interior of the fly ash collection hopper 201 is hollow and open at both axial ends. The axial top of the fly ash collection hopper 201 is fixedly mounted on the outer surface of the bottom side wall of the horizontal flue 3.

[0048] A fly ash bin 202 is further installed at the axial bottom of the plurality of fly ash collecting hoppers 201 , and the fly ash bin 202 can be communicated with the axial bottom of the plurality of fly ash collecting hoppers 201 at the same time.

[0049] In this embodiment, both axial ends of the swirl shell type large fly ash catcher 101 are open.

[0050] In this embodiment, the flue gas is transported from left to right in the horizontal flue 3 .

[0051] As a preferred solution of this embodiment, multiple large swirl shell type fly ash catchers 101 are evenly arranged longitudinally inside the horizontal flue 3, the cross-section of each large swirl shell type fly ash catcher 101 is spiral, the central axis of each large swirl shell type fly ash catcher 101 is arranged vertically, and the axial bottom of each large swirl shell type fly ash catcher 101 also extends vertically to the outside of the bottom side wall of the horizontal flue 3.

[0052] A plurality of grid capture holes 102 are evenly arranged in an array on the side wall of the rotary shell type large fly ash catcher 101 .

[0053] In this embodiment, Figure 3 As shown, the vortex-type large fly ash catcher 101 is covered with a grid of capture holes 102, which intercept large fly ash in the flue gas within the horizontal flue 3. Depending on the longitudinal dimension of the inner diameter of the horizontal flue 3, multiple vortex-type large fly ash catchers 101 can be installed simultaneously. Furthermore, in this embodiment, two vortex-type large fly ash catchers 101 are installed longitudinally within the horizontal flue 3. These two vortex-type large fly ash catchers 101 share the same fly ash bin 202 and can be simultaneously connected to the same fly ash bin 202.

[0054] As a preferred solution of this embodiment, Figure 4 As shown, a fixed rotating shaft 103 is also integrated on the swirl shell type large fly ash catcher 101. The fixed rotating shaft and the swirl shell type large fly ash catcher 101 correspond one to one. The central axis of the fixed rotating shaft 103 and the central axis of the swirl shell type large fly ash catcher 101 are collinear, and the axial length of the fixed rotating shaft 103 is greater than the vertical height of the swirl shell type large fly ash catcher 101.

[0055] like Figure 2As shown, the axial top of the fixed shaft 103 is also coaxially provided with a catcher top support 104, the axial bottom of the catcher top support 104 is rotatably connected to the axial top of the fixed shaft 103, and the axial top of the catcher top support 104 is fixedly connected to the inner side of the top side wall of the horizontal flue 3.

[0056] The axial bottom of the fixed shaft 103 is also coaxially provided with a catcher bottom bracket 105, the axial top of the catcher bottom bracket 105 is rotatably connected to the axial bottom of the fixed shaft 103, and the axial bottom of the catcher bottom bracket 105 is fixedly connected to the inner side of the side wall of the fly ash collection bucket 201.

[0057] In this embodiment, the rotational connection method adopts the commonly used rotational connection method known in the art.

[0058] In this embodiment, the axial top of the trap top support 104 and the inner side of the top side wall of the horizontal flue 3 are fixedly connected by welding.

[0059] In this embodiment, the axial bottom of the catcher bottom bracket 105 and the inner side of the side wall of the fly ash collecting hopper 201 are fixedly connected by welding.

[0060] In this embodiment, the vertical height of the top support 104 of the catcher is smaller than the vertical height of the inner diameter of the horizontal flue 3, or compared with the vertical height of the swirl shell type large fly ash catcher 101, so the vertical height of the top support 104 of the catcher can be ignored, that is, the swirl shell type large fly ash catcher 101 covers the entire vertical height inside the horizontal flue 3, thereby enabling the swirl shell type large fly ash catcher 101 to capture large fly ashes of the entire vertical height inside the horizontal flue 3.

[0061] In this embodiment, the cross-section of the swirl shell type large fly ash catcher 101 is spiral-shaped. Driven by the flue gas in the horizontal flue 3, the swirl shell type large fly ash catcher 101 can rotate around the fixed rotating shaft 103; when the large fly ash in the flue gas is blocked by the capture hole, due to the rotation of the swirl shell type large fly ash catcher 101, the large fly ash will fall into the fly ash bin 202 in the large fly ash collection unit 2 under the action of centrifugal force and gravity.

[0062] As a preferred solution of this embodiment, the fly ash collecting hopper 201 is funnel-shaped. The fly ash collecting hopper 201 includes an integrally arranged funnel cone 20101 and a funnel neck 20102 in sequence from top to bottom along the vertical direction.

[0063] The funnel cone 20101 is coaxially arranged with the swirl shell type large fly ash catcher 101, and the axial top of the funnel cone 20101 is sealed and fixedly connected to the outer side of the bottom side wall of the horizontal flue 3. The maximum cross-sectional area of ​​the funnel cone 20101 is greater than the maximum cross-sectional area of ​​the swirl shell type large fly ash catcher 101.

[0064] As a preferred solution of this embodiment, a fly ash valve 203 is also installed on the funnel neck 20102. The fly ash valve 203 corresponds to the funnel neck 20102 one by one. The fly ash valve 203 can connect or isolate the funnel neck 20102 and the fly ash bin 202.

[0065] As a preferred solution of this embodiment, the axial bottoms of the multiple funnel necks 20102 are also sealed with the fly ash bin 202 and are in communication with each other.

[0066] A weight sensor 204 is further provided in the fly ash bin 202 , and the bottom or side wall of the fly ash bin 202 can be opened or closed.

[0067] In this embodiment, large fly ash carried in the flue gas within the horizontal flue 3 falls from the swirl-type large fly ash catcher 101 into the fly ash collection hopper 201 under the action of centrifugal force and gravity. It then passes through the fly ash valve 203 and enters the fly ash bin 202. A weight sensor 204 is installed within the fly ash bin 202. When the weight of the large fly ash in the fly ash bin 202 reaches a set value, the fly ash valve 203 is closed, and a technician transfers the large fly ash from the fly ash bin 202.

[0068] In this embodiment, the fly ash bin 202 is arranged in the longitudinal direction. When the fly ash valve 203 is opened, the fly ash bin 202 can be connected to two large swirl shell fly ash catchers 101 at the same time.

[0069] As a preferred solution of this embodiment, the material of the rotary shell type large fly ash catcher 101 includes 316L stainless steel or 2205 stainless steel.

[0070] As a preferred solution of this embodiment, the fly ash bin 202 is made of Q345 low alloy steel.

[0071] In this embodiment, the material of the rotary shell type large fly ash catcher 101 is 316L stainless steel; the material of the fly ash bin 202 is Q345 low alloy steel.

[0072] In this embodiment, two swirl-type large fly ash catchers 101 are installed longitudinally along the horizontal flue 3 of the coal-fired boiler, based on its flue dimensions. When the coal-fired boiler's operating conditions fluctuate due to peak load regulation, a large amount of large fly ash is generated in the furnace. The flue gas carries this large fly ash into the swirl-type large fly ash catcher 101, which rotates around a fixed shaft 103. After being intercepted by the catch holes, the swirl-type large fly ash catcher 101 rotates around a fixed shaft 103. The large fly ash carried in the flue gas is then trapped by the catch holes. Due to the rotation of the swirl-type large fly ash catcher 101, the large fly ash falls into the fly ash collection hopper 201 under the influence of centrifugal force and gravity. The ash then passes through the fly ash valve 203 and enters the fly ash bin 202. A weight sensor 204 is installed in the fly ash bin 202. When the fly ash weight reaches a set value, the fly ash valve 203 closes, and technicians transfer the large fly ash from the bin 202.

[0073] The device in this embodiment combines a swirl shell large fly ash catcher 101 with a fixed rotating shaft 103, and can effectively utilize the flow of flue gas to realize the rotation of the swirl shell large fly ash catcher 101. On the premise of ensuring the interception of large fly ash, it can also effectively utilize the effects of centrifugal force and gravity to ensure that large fly ash falls into the fly ash collection bucket 201 in a timely manner, and finally falls into the fly ash bin 202 when the fly ash valve 203 is open. At the same time, the centrifugal force generated by the rotation of the swirl shell large fly ash catcher 101 and the changes in the internal flow field of the swirl shell large fly ash catcher 101 caused by the rotation are utilized to avoid the blockage of the grid capture holes 102 caused by large fly ash, thereby achieving self-cleaning of the device in this embodiment. The device in this embodiment can effectively capture large fly ash, protect the downstream SCR denitrification system and air preheater from the source, and has good energy-saving and environmental protection benefits.

Claims

1. A rotary shell type large fly ash capture and collection device, characterized in that: The invention comprises a plurality of identical large fly ash capture units (1), wherein the plurality of large fly ash capture units (1) are arranged in parallel and evenly inside a horizontal flue (3) arranged in a transverse direction, an angle is formed between the central axis of each large fly ash capture unit (1) and the central axis of the horizontal flue (3), and a large fly ash collection unit (2) is further provided at the bottom of each large fly ash capture unit (1); The large fly ash capture unit (1) comprises a swirl shell type large fly ash catcher (101), a plurality of grid capture holes (102) are provided on the side wall of the swirl shell type large fly ash catcher (101), and the swirl shell type large fly ash catcher (101) can also rotate around its own central axis; The large fly ash collection unit (2) comprises a fly ash collection hopper (201), the fly ash collection hopper (201) corresponds to the swirl shell type large fly ash catcher (101) one by one and is interconnected, the fly ash collection hopper (201) is hollow inside and open at both axial ends, and the axial top of the fly ash collection hopper (201) is fixedly mounted on the outer surface of the bottom side wall of the horizontal flue (3); A fly ash bin (202) is also installed at the axial bottom of the plurality of fly ash collecting hoppers (201), and the fly ash bin (202) can be simultaneously connected to the axial bottoms of the plurality of fly ash collecting hoppers (201).

2. The swirl shell type large fly ash capture and collection device according to claim 1, characterized in that: A plurality of the swirl shell type large fly ash catchers (101) are uniformly arranged longitudinally inside the horizontal flue (3), the cross section of each swirl shell type large fly ash catcher (101) is spiral-shaped, the central axis of each swirl shell type large fly ash catcher (101) is arranged vertically, and the axial bottom of each swirl shell type large fly ash catcher (101) also extends vertically to the outside of the bottom side wall of the horizontal flue (3); The plurality of square capture holes (102) are evenly arranged in an array on the side wall of the rotary shell type large fly ash catcher (101).

3. The swirl shell type large fly ash capture and collection device according to claim 1, characterized in that: The swirl shell type large fly ash catcher (101) is further integrated with a fixed rotating shaft (103), the fixed rotating shaft and the swirl shell type large fly ash catcher (101) correspond one to one, the central axis of the fixed rotating shaft (103) and the central axis of the swirl shell type large fly ash catcher (101) are collinear, and the axial length of the fixed rotating shaft (103) is greater than or equal to the vertical height of the swirl shell type large fly ash catcher (101); The axial top of the fixed rotating shaft (103) is also coaxially provided with a trap top support (104), the axial bottom of the trap top support (104) is rotatably connected to the axial top of the fixed rotating shaft (103), and the axial top of the trap top support (104) is fixedly connected to the inner side of the top side wall of the horizontal flue (3); The axial bottom of the fixed rotating shaft (103) is also coaxially provided with a catcher bottom bracket (105), the axial top of the catcher bottom bracket (105) is rotatably connected to the axial bottom of the fixed rotating shaft (103), and the axial bottom of the catcher bottom bracket (105) is fixedly connected to the inner side of the side wall of the fly ash collecting bucket (201).

4. The swirl shell type large fly ash capture and collection device according to claim 1, characterized in that: The fly ash collecting hopper (201) is funnel-shaped, and vertically, from top to bottom, comprises an integrated funnel cone (20101) and a funnel neck (20102); The funnel cone (20101) is coaxially arranged with the swirl shell type large fly ash catcher (101), and the axial top of the funnel cone (20101) is sealed and fixedly connected to the outer side of the bottom side wall of the horizontal flue (3), and the maximum cross-sectional area of ​​the funnel cone (20101) is greater than the maximum cross-sectional area of ​​the swirl shell type large fly ash catcher (101).

5. The swirl shell type large fly ash capture and collection device according to claim 4, characterized in that: A fly ash valve (203) is also installed on the funnel neck (20102), and the fly ash valve (203) corresponds to the funnel neck (20102) one to one. The fly ash valve (203) can connect or isolate the funnel neck (20102) and the fly ash bin (202).

6. The swirl shell type large fly ash capture and collection device according to claim 5, characterized in that: The axial bottoms of the plurality of funnel necks (20102) are also sealed with the fly ash bin (202) and are in communication with each other; A weight sensor (204) is also provided in the fly ash bin (202), and the bottom or side wall of the fly ash bin (202) can be opened or closed.

7. The swirl shell type large fly ash capture and collection device according to claim 1, characterized in that: The material of the rotary shell type large fly ash catcher (101) includes 316L stainless steel or 2205 stainless steel.

8. The swirl shell type large fly ash capture and collection device according to claim 1, characterized in that: The fly ash bin (202) is made of Q345 low alloy steel.

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