A fluidized fly ash storage bin

Abstract

This invention discloses a fluidized bed fly ash storage silo, comprising: a cylindrical body, a silo top plate, a conical hopper, multiple ash storage bags, and a flue gas distribution pipe; the silo top plate is provided with a fly ash inlet and a flue gas inlet, the ash storage bags are connected to the fly ash inlet, and the flue gas distribution pipe is connected to the flue gas inlet and is provided with flue gas holes facing the ash storage bags; fly ash is stored in the ash storage bags, and clean flue gas flows through the flue gas holes to flush and insulate the fly ash in the ash storage bags, keeping the fly ash in a loose state; the bottom of the ash storage bags is provided with an openable and closable bottom plate, and the conical hopper is provided with a fly ash outlet and a flue gas outlet; this silo can reduce the risks of fly ash caking, bag sticking, poor material discharge, and silo wall corrosion, and utilizes the waste heat of flue gas to reduce energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of waste incineration flue gas purification technology, specifically a fluidized fly ash storage bin. Background Technology

[0002] During the flue gas purification process of waste incineration, the flue gas treatment system generates a certain amount of fly ash. This type of fly ash usually needs to be temporarily stored before entering subsequent solidification, stabilization, or off-site treatment processes. Current fly ash storage methods mostly employ steel ash silos or steel containers for centralized storage, maintaining the fly ash storage temperature through electric heating and external insulation to reduce problems such as moisture absorption, clumping, and poor discharge. Some fly ash silos are also located in outdoor open-air environments, subject to long-term temperature and humidity changes, as well as the corrosive components of the fly ash itself. This can easily lead to problems such as silo wall corrosion, thinning of the slabs, and damage to the insulation layer, thereby affecting equipment operation safety and maintenance costs.

[0003] However, fly ash is typically piled up in a monolithic state within traditional steel ash silos. The fly ash particles are prone to caking and bridging due to changes in moisture content, temperature, or prolonged static storage, leading to poor discharge and even silo blockage. When manual cleaning or maintenance is required, it is not only physically demanding but also prone to fly ash scattering, damage to external insulation, and environmental pollution. Furthermore, traditional electric heating and external insulation methods are energy-intensive and fail to continuously improve the loose state of the fly ash within the silo.

[0004] As factors such as the source of waste, its calorific value, and moisture content change, the amount of fly ash produced during waste incineration also fluctuates. Existing fixed-volume ash silos struggle to flexibly adjust their effective ash storage capacity according to daily fly ash production: when fly ash production increases, the silo capacity may be insufficient; when fly ash production decreases, the remaining space within the silo is large, making it difficult to maintain stable fly ash falling distance and airflow distribution, which may still affect the feeding efficiency. Therefore, it is necessary to provide a fly ash storage silo structure that can improve fly ash caking and feeding bottlenecks, reduce the risk of silo wall corrosion, and enhance the adaptability of ash storage conditions. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, a fluidized fly ash storage silo is proposed.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a fluidized fly ash storage bin, comprising: a cylinder, an ash bin top plate connected to the top of the cylinder, a conical hopper connected to the bottom of the cylinder, a plurality of ash storage bags and a flue gas distribution pipe inside the cylinder and connected to the ash bin top plate, a fly ash outlet set at the bottom of the conical hopper, a flue gas outlet set at the side of the conical hopper, and a bottom plate set at the bottom of the ash storage bags and capable of being opened and closed;

[0007] The top plate of the ash silo is equipped with multiple fly ash inlets and flue gas inlets. The ash storage bag is connected to the fly ash inlet, and the flue gas distribution pipe is connected to the flue gas inlet. The flue gas distribution pipe has multiple flue gas holes facing the ash storage bag.

[0008] Preferably, the ash storage bag is provided with multiple fixing rings spaced apart along the axial direction, and adjacent fixing rings are connected by a traction rope, which is connected to the traction machine.

[0009] Preferably, the cylinder includes: an outer cylinder, an inner cylinder sleeved outside the outer cylinder and movable along the axial direction of the outer cylinder, and a sealing element disposed between the outer cylinder and the inner cylinder; the top plate of the ash silo is connected to the outer cylinder, and the cone hopper is connected to the inner cylinder.

[0010] Preferably, two racks are symmetrically arranged on the outside of the outer cylinder along the axis of the outer cylinder, and a motor is installed on the external support. The output shaft of the motor is provided with a gear that meshes with the racks.

[0011] Preferably, the inner walls of the inner cylinder and the cone are provided with guide plates, and multiple guide grooves are formed on the guide plates.

[0012] Preferably, the fly ash inlets are arranged in a circular array along the top plate of the ash silo, and the flue gas inlets are arranged around the fly ash inlets.

[0013] Preferably, the flue gas distribution pipe includes: an upper flue gas ring pipe, a plurality of vertical branch pipes connected to the upper flue gas ring pipe, and a lower flue gas ring pipe connected to the bottom of the upper flue gas ring pipe through a flue gas connecting pipe; The top of the vertical flue gas branch pipe is connected to the fly ash inlet; the upper flue gas ring pipe is located at the upper part of the cone, and the lower flue gas ring pipe is horizontally positioned above the flue gas outlet.

[0014] Preferably, multiple flue gas holes are provided at intervals on the vertical flue gas branch pipe, and the flue gas holes on the upper and lower flue gas ring pipes are located below the center lines of the upper and lower flue gas ring pipes.

[0015] Preferably, the bottom of the ash storage bag is hinged to a bottom plate, and a support plate is connected to the bottom of the ash storage bag. A pneumatic telescopic rod is hinged between the support plate and the bottom plate.

[0016] Preferably, a filter layer is provided at the flue gas outlet, and a cleaning nozzle is provided at the filter layer, with the cleaning nozzle blowing in the direction of the filter layer.

[0017] The beneficial effects of this invention are as follows: 1. The fluidized fly ash storage bin of the present invention employs multiple ash storage bags arranged inside a cylinder and connected to the fly ash inlet respectively. Simultaneously, a flue gas distribution pipe connected to the flue gas inlet is installed inside the cylinder, with the flue gas holes on the distribution pipe facing the ash storage bags. Fly ash is stored in units through the ash storage bags, and the flue gas ejected from the flue gas holes continuously flushes and insulates the ash storage bags and the fly ash inside, achieving the goal of reducing direct contact between fly ash and the metal inner wall of the bin and maintaining a loose, flowing state of the fly ash. This reduces the risk of bin corrosion, reduces fly ash caking and sticking to the bags, improves material flow, and utilizes waste heat from the flue gas to reduce insulation energy consumption. Furthermore, it solves the technical problems of existing fly ash storage bins, such as easy fly ash caking, poor material flow, easy bin wall corrosion, and high energy consumption due to reliance on electric heating or external insulation.

[0018] 2. The fluidized fly ash storage bin of the present invention, by setting multiple fixed rings at axial intervals on the ash storage bag and connecting adjacent fixed rings with traction ropes, and connecting the traction ropes to the traction machine, allows the traction machine to drive the fixed rings to retract or expand along the axial direction of the ash storage bag by raising and lowering the traction ropes, thereby adjusting the actual ash storage capacity of the ash storage bag. This avoids the problem that the fixed capacity ash bin has insufficient storage when the amount of fly ash increases, or that the space inside the bin is too large and the material discharge distance is too long when the amount of fly ash decreases, thus affecting the stability of material discharge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the fluidized fly ash storage silo of the present invention; Figure 2 This is a schematic diagram of the structure of the top plate of the ash silo in this invention; Figure 3 This is a top view of the guide vane in this invention; Figure 4 This is a top view of the upper flue gas ring pipe, flue gas connecting pipe and lower flue gas ring pipe in this invention; Figure 5 This is a schematic diagram of the vertical branch pipe for flue gas in this invention; Figure 6 This is a schematic diagram of the traction machine, traction rope, and fixing ring in this invention; Figure 7 This is a schematic diagram of the structure of the cylinder in this invention; Figure 8 This is a schematic diagram of the rack and gear structure in this invention; Figure 9 This is a schematic diagram of the structure of the base plate, support plate, and pneumatic telescopic rod in this invention.

[0020] Legend: 1. Ash silo top plate; 2. Fly ash inlet; 3. Flue gas inlet; 4. Ash storage bag; 5. Vertical flue gas branch pipe; 6. Upper flue gas ring pipe; 7. Flue gas connecting pipe; 8. Lower flue gas ring pipe; 9. Fly ash outlet; 10. Guide channel; 11. Guide plate; 12. Gas source tank; 13. Pneumatic hose; 14. Pneumatic telescopic rod; 15. Flue gas outlet; 16. Flue gas hole; 17. Traction machine; 18. Traction rope; 19. Fixing ring; 20. Outer cylinder; 21. Sealing element; 22. Inner cylinder; 23. Rack; 24. Gear; 25. Base plate; 26. Support plate; 27. Filter layer; 28. Cleaning nozzle; 29. ​​Cylinder; 30. Conical hopper; 31. Flue gas distribution pipe. Detailed Implementation

[0021] To illustrate in detail the technical solutions adopted by the present invention to achieve the intended technical objectives, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Furthermore, the technical means or technical features in the embodiments of the present invention can be replaced without creative effort. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] Example 1 like Figure 1-9 As shown, this embodiment provides a fluidized bed fly ash storage silo, including: a cylindrical body 29, a silo top plate 1, a conical hopper 30, multiple ash storage bags 4, a flue gas distribution pipe 31, a fly ash outlet 9, a flue gas outlet 15, and a bottom plate 25. The silo top plate 1 is connected to the top of the cylindrical body 29, the conical hopper 30 is connected to the bottom of the cylindrical body 29, the fly ash outlet 9 is located at the bottom of the conical hopper 30, and the flue gas outlet 15 is located on the side of the conical hopper 30. The multiple ash storage bags 4 and the flue gas distribution pipe 31 are all disposed inside the cylindrical body 29. The upper end of the ash storage bags 4 is connected to the silo top plate 1, and the bottom plate 25 is located at the bottom of the ash storage bags 4 and can be opened or closed relative to the ash storage bags 4.

[0023] Multiple fly ash inlets 2 and flue gas inlets 3 are provided on the top plate 1 of the ash silo. The fly ash inlets 2 are used to connect with the fly ash conveying pipeline, and the flue gas inlets 3 are used to connect with the clean flue gas conveying pipeline. The flue gas is taken from the clean flue gas that has undergone acid removal, denitrification, and dust removal. The multiple fly ash inlets 2 are arranged in a circular array along the center of the top plate 1 of the ash silo, and the multiple flue gas inlets 3 are arranged around the fly ash inlets 2. The ash storage bag 4 is connected to the corresponding fly ash inlet 2, and fly ash can enter the ash storage bag 4 through the fly ash inlet 2; the flue gas distribution pipe 31 is connected to the flue gas inlet 3, and clean flue gas can enter the flue gas distribution pipe 31 through the flue gas inlet 3.

[0024] The ash storage bag 4 adopts a high-temperature resistant and breathable bag structure. After fly ash enters the ash storage bag 4, it is stored inside the ash storage bag 4. The ash storage bag 4 can prevent fly ash particles from overflowing while allowing gas to pass through. When pneumatic conveying is used for feeding, the conveying gas that enters the ash storage bag 4 with the fly ash can be released outward through the ash storage bag 4, while the fly ash particles are retained inside the ash storage bag 4. Thus, the fly ash no longer directly contacts the inner walls of the cylinder 29 and the cone hopper 30 in a large volume, but is stored separately in multiple ash storage bags 4, which can reduce the corrosion of the metal silo walls by fly ash and reduce the risk of large volume fly ash caking.

[0025] The flue gas distribution pipe 31 includes: an upper flue gas ring pipe 6, multiple vertical branch pipes 5, a flue gas connecting pipe 7, and a lower flue gas ring pipe 8. The multiple vertical branch pipes 5 are arranged along the height of the cylinder 29 and distributed around the ash storage bag 4; the top of the vertical branch pipes 5 is connected to the flue gas inlet 3. The upper flue gas ring pipe 6 is located at the upper part of the cone hopper 30, and the lower flue gas ring pipe 8 is located below the upper flue gas ring pipe 6, with its horizontal height above the flue gas outlet 15. The upper flue gas ring pipe 6 and the lower flue gas ring pipe 8 are connected by the flue gas connecting pipe 7, allowing clean flue gas to be distributed from the straight section of the cylinder 29 to the upper section of the cone hopper 30.

[0026] Multiple flue gas holes 16 are provided on the flue gas distribution pipe 31. Among them, the flue gas holes 16 on the vertical branch pipe 5 are arranged at intervals along the length of the vertical branch pipe 5 and are set towards the ash storage bag 4; the flue gas holes 16 on the upper flue gas ring pipe 6 and the lower flue gas ring pipe 8 are set below the center line of the upper flue gas ring pipe 6 and the lower flue gas ring pipe 8. After the clean flue gas enters the flue gas distribution pipe 31, it is sprayed out through the flue gas holes 16 and acts on the outside of the ash storage bag 4. Some of the clean flue gas can pass through the ash storage bag 4 and enter the bag body to flush and insulate the fly ash in the ash storage bag 4, so that the fly ash remains in a relatively loose fluidized state, thereby reducing the phenomena of fly ash caking, bag sticking and poor material discharge; since the clean flue gas itself has residual heat, this structure can also use the residual heat of the clean flue gas to insulate the fly ash, reducing the energy consumption of traditional external insulation or electric heating methods.

[0027] The upper flue gas ring pipe 6 is located at the upper level of the cone hopper 30 and connects to the vertical flue gas branch pipe 5, allowing the clean flue gas delivered downwards by the vertical flue gas branch pipe 5 to enter the upper region of the cone hopper 30 and form a circumferential distribution in the upper part of the cone hopper 30. The lower flue gas ring pipe 8 is located at the lower level of the cone hopper 30 and connects to the upper flue gas ring pipe 6 through the flue gas connecting pipe 7, allowing the clean flue gas to be further distributed to the lower region of the cone hopper 30. This ensures that there is flue gas flow in both the upper and lower parts of the cone hopper 30, avoiding insufficient flue gas flow in the lower part of the cone hopper 30 due to gas supply only in the straight section of the cylinder 29 or the upper part of the cone hopper 30.

[0028] The lower flue gas ring pipe 8 is at a higher level than the flue gas outlet 15, so that the flue gas ejected from the lower flue gas ring pipe 8 can flow inside the cone 30 first, and then be discharged through the flue gas outlet 15. This ensures that the flue gas has the necessary flow path inside the cone 30, and avoids the flue gas being discharged directly from the flue gas outlet 15, which would weaken the flow guidance effect on the fly ash inside the cone 30.

[0029] The flue gas holes 16 on the two flue gas ring pipes are evenly distributed in the lower half of the pipe centerline, so that the flue gas is mainly sprayed out towards the area below the cone hopper 30. This can form a forward or oblique airflow in conjunction with the direction of the fly ash falling by its own weight, reducing the upward or lateral impact of the flue gas on the fly ash falling path, thereby avoiding interference with the fly ash feeding process.

[0030] The inner walls of the cylinder 29 and the conical hopper 30 are equipped with guide plates 11, and multiple guide grooves 10 are formed on the guide plates 11. The guide grooves 10 are used to guide fly ash and flue gas to flow downward. After the fly ash is discharged from the bottom of the ash storage bag 4, it flows towards the fly ash outlet 9 at the bottom of the conical hopper 30 under the guidance of the guide plates 11 and the guide grooves 10. Through the cooperation of the guide plates 11 and the guide grooves 10, the flue gas can be guided to carry the fly ash downward, thus dividing the fly ash distribution into intervals, reducing the lateral accumulation and mutual compression of fly ash in the conical hopper 30, and facilitating the discharge of fly ash in a predetermined direction by the flue gas.

[0031] A bottom plate 25 is hinged to the bottom of the ash storage bag 4, and a support plate 26 is connected to the bottom of the ash storage bag 4. A pneumatic telescopic rod 14 is hinged between the support plate 26 and the bottom plate 25. The pneumatic telescopic rod 14 is connected to an air source tank 12 via a pneumatic hose 13, and the air source tank 12 is used to provide pneumatic power to the pneumatic telescopic rod 14. The pneumatic hose 13 can be set as a flexible hose, and a metal braided mesh can be wrapped around the pneumatic hose 13 to reduce the friction and wear of fly ash particles on the pneumatic hose 13 and improve the stability of the pneumatic hose 13 in the fly ash environment.

[0032] In the feeding or ash storage state, the air source tank 12 supplies air to the pneumatic telescopic rod 14 through the pneumatic hose 13. The pneumatic telescopic rod 14 extends and supports the bottom plate 25, so that the bottom plate 25 closes the bottom of the ash storage bag 4, and the fly ash can be stably stored in the ash storage bag 4. When it is necessary to discharge, the pneumatic telescopic rod 14 corresponding to the bottom of the ash storage bag 4 loses pressure or retracts. Under the action of the fly ash's own weight, the bottom plate 25 opens around its hinge position, and the fly ash in the ash storage bag 4 falls into the cone hopper 30 and is discharged through the fly ash outlet 9. After the discharge is completed, the air source tank 12 supplies air to the pneumatic telescopic rod 14 again. The pneumatic telescopic rod 14 extends and pushes the bottom plate 25 to reset, so that the bottom of the ash storage bag 4 closes again.

[0033] Multiple ash storage bags 4 can be fed simultaneously or in batches. During feeding, a sequential feeding method can be adopted, that is, selecting one or some ash storage bags 4 and opening the bottom plate 25 to feed. This method can reduce the risk of fly ash outlet 9 being blocked due to excessive instantaneous fly ash feeding.

[0034] A filter layer 27 is installed at the flue gas outlet 15. The filter layer 27 is used to intercept fine fly ash particles that flow towards the flue gas outlet 15 with the flue gas. A cleaning nozzle 28 is installed at the filter layer 27, and the cleaning nozzle 28 blows towards the filter layer 27. The cleaning nozzle 28 is connected to the air source tank 12, which provides the blowing air source. When fly ash accumulates on the surface of the filter layer 27, the cleaning nozzle 28 can blow and clean the filter layer 27, causing the fly ash on the surface of the filter layer 27 to fall off, thereby maintaining the air permeability of the filter layer 27 and the exhaust stability of the flue gas outlet 15.

[0035] The working principle of this embodiment is as follows: Fly ash enters the ash storage bag 4 through the fly ash inlet 2, and the bottom plate 25 is in a closed state; clean flue gas enters the flue gas distribution pipe 31 through the flue gas inlet 3, and is sprayed out towards the ash storage bag 4 through the flue gas hole 16, which insulates and fluidizes the fly ash inside the ash storage bag 4. When feeding is required, the pneumatic telescopic rod 14 retracts or loses pressure, the bottom plate 25 opens, and the fly ash enters the cone hopper 30 under its own weight and the action of flue gas guidance, and is finally discharged from the fly ash outlet 9; the flue gas is discharged through the flue gas outlet 15, and the filter layer 27 intercepts the fine fly ash particles in the flue gas.

[0036] By setting multiple ash storage bags 4 inside the cylinder 29 and connecting each ash storage bag 4 to the fly ash inlet 2, fly ash can be stored in multiple ash storage bags 4 in a unitized manner, avoiding direct large-area contact between fly ash and the metal inner wall of the cylinder 29 and the cone hopper 30, thereby reducing the risk of fly ash corrosion to the inner wall of the silo. At the same time, the flue gas distribution pipe 31 is connected to the flue gas inlet 3, and a flue gas hole 16 facing the ash storage bag 4 is set on the flue gas distribution pipe 31, so that the clean flue gas can continuously act on the ash storage bag 4 from the outside, using the residual heat of the clean flue gas to keep the fly ash warm, and keeping the fly ash in a relatively loose fluidized state through airflow scouring, thereby reducing the problems of fly ash caking, bag sticking and poor material discharge.

[0037] Furthermore, by setting an openable and closable bottom plate 25 at the bottom of the ash storage bag 4, and controlling the opening and closing of the bottom plate 25 through the pneumatic telescopic rod 14, support plate 26, air source tank 12 and pneumatic hose 13, the ash storage bag 4 can be reliably sealed in the feeding and ash storage state, and opened as needed in the discharging state, thereby realizing the separate bag storage and batch discharging of fly ash, reducing the risk of blockage caused by excessive instantaneous load on fly ash outlet 9 due to simultaneous discharging of multiple ash storage bags 4.

[0038] Example 2 like Figure 6 As shown, this embodiment further implements the ash storage length adjustment structure of the ash storage bag 4 based on embodiment 1.

[0039] The ash storage bag 4 is provided with multiple fixing rings 19 at intervals along the axial direction. The fixing rings 19 are sleeved on the outer circumference of the ash storage bag 4. Adjacent fixing rings 19 are connected by traction ropes 18, which are connected to the traction machine 17. The traction machine 17 is located above the ash storage bag 4, and the traction ropes 18 extend downward from the traction machine 17 and connect to the multiple fixing rings 19 in sequence.

[0040] When it is necessary to reduce the ash storage capacity of the ash storage bag 4, the traction machine 17 winds up the traction rope 18, and the traction rope 18 drives the fixing ring 19 to roll upward, so that the ash storage bag 4 is folded along the axial direction, thereby shortening the effective ash storage length of the ash storage bag 4; when it is necessary to increase the ash storage capacity of the ash storage bag 4, the traction machine 17 loosens the traction rope 18, and the fixing ring 19 unfolds downward with the ash storage bag 4, so that the effective ash storage length of the ash storage bag 4 is increased.

[0041] By axially spaced multiple fixing rings 19 on the ash storage bag 4 and connecting adjacent fixing rings 19 with traction ropes 18, and connecting the traction ropes 18 with the traction machine 17, the traction machine 17 can drive the fixing rings 19 to retract or expand along the axial direction of the ash storage bag 4 by retracting and extending the traction ropes 18, thereby adjusting the effective ash storage length of the ash storage bag 4.

[0042] In this embodiment, the actual ash storage capacity of the ash storage bag 4 is adjusted according to the daily fly ash production, waste incineration load, and changes in waste calorific value or moisture content. This avoids the problem that the fixed-capacity ash silo is not sufficient when the fly ash production increases, or that the space inside the silo is too large and the feeding distance is too long when the fly ash production decreases, thus affecting the feeding stability.

[0043] Example 3 like Figure 7 and Figure 8 As shown, this embodiment implements the height adjustment structure of the cylinder 29 based on embodiment 1 or embodiment 2.

[0044] The cylinder 29 includes an outer cylinder 20, an inner cylinder 22, and a sealing element 21. The inner cylinder 22 is fitted over the outer cylinder 20 and is movable along the axial direction of the outer cylinder 20. The sealing element 21 is disposed between the outer cylinder 20 and the inner cylinder 22 to maintain the sealing of the interior of the cylinder 29 when the outer cylinder 20 and the inner cylinder 22 move relative to each other. The top plate 1 of the ash silo is connected to the outer cylinder 20, and the conical hopper 30 is connected to the inner cylinder 22.

[0045] Two racks 23 are symmetrically arranged on the outer cylinder 20 along its axis. A motor is mounted on the external support, and a gear 24 that meshes with the racks 23 is mounted on the motor output shaft. When the motor drives the gear 24 to rotate, the gear 24 meshes with the racks 23, causing the outer cylinder 20 to move axially relative to the inner cylinder 22, thereby changing the relative distance between the top plate 1 of the ash silo and the cone hopper 30.

[0046] When the ash storage bag 4 shrinks due to length adjustment, the distance between the bottom of the ash storage bag 4 and the cone hopper 30 may increase. After the fly ash falls from the bottom of the ash storage bag 4, it is easily affected by the lateral flow of flue gas and deviates from the direction of the fly ash outlet 9. At this time, the motor drives the gear 24 to rotate, and the gear 24 drives the rack 23 to move, so that the outer cylinder 20 drives the ash hopper top plate 1 and the ash storage bag 4 to move down as a whole, shortening the falling distance between the bottom of the ash storage bag 4 and the cone hopper 30, making it easier for the fly ash to enter the bottom of the cone hopper 30 and be discharged from the fly ash outlet 9.

[0047] When the length of the ash storage bag 4 is large, the outer cylinder 20 can be moved upward relative to the inner cylinder 22 by the cooperation of the gear 24 and the rack 23 according to the lower position of the ash storage bag 4, so as to ensure that there is an appropriate material feeding space between the bottom of the ash storage bag 4 and the cone hopper 30, and to avoid interference between the bottom of the ash storage bag 4 and the inner wall of the cone hopper 30 or the fly ash outlet 9 area.

[0048] The seal 21 is located in the joint area between the outer cylinder 20 and the inner cylinder 22. When the outer cylinder 20 and the inner cylinder 22 slide relative to each other, it can reduce the leakage of flue gas and fly ash from the joint between the two, thereby ensuring the airtightness of the silo.

[0049] In this embodiment, the guide plate 11 is disposed on the inner wall of the inner cylinder 22 and the cone 30 to continuously guide fly ash and flue gas within the inner cylinder 22 and the cone 30.

[0050] In this embodiment, by setting the cylinder 29 as a telescopic structure with the outer cylinder 20, the inner cylinder 22 and the sealing element 21, and connecting the ash silo top plate 1 to the outer cylinder 20 and the cone hopper 30 to the inner cylinder 22, the outer cylinder 20 can move axially relative to the inner cylinder 22, thereby adjusting the relative distance between the ash silo top plate 1 and the cone hopper 30.

[0051] Furthermore, by symmetrically arranging racks 23 on the outside of the outer cylinder 20 and engaging the gear 24 at the motor output shaft end with the racks 23, the outer cylinder 20 can be driven to rise and fall via a rack and pinion transmission, making the height adjustment of the cylinder 29 more stable and controllable. When the ash storage bag 4 is shortened due to capacity adjustment, the outer cylinder 20 can cause the ash hopper top plate 1 and the ash storage bag 4 to move downward as a whole, shortening the falling distance between the bottom of the ash storage bag 4 and the cone hopper 30, reducing the possibility of fly ash shifting to the side of the cone hopper 30 due to flue gas disturbance during the falling process, thereby improving the stability of fly ash entering the fly ash outlet 9.

[0052] Meanwhile, the sealing element 21 is disposed between the outer cylinder 20 and the inner cylinder 22, which can maintain the seal of the silo when the outer cylinder 20 and the inner cylinder 22 move relative to each other, reducing the leakage of flue gas and fly ash from the cylinder connection. Therefore, this embodiment can not only change the material feeding space by adjusting the capacity of the ash storage bag 4, but also ensure the sealing of the silo and the safety of operation during the adjustment process.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A fluidized bed fly ash storage bin, characterized in that, include: The cylinder (29), the ash hopper top plate (1) connected to the top of the cylinder (29), the cone hopper (30) connected to the bottom of the cylinder (29), the multiple ash storage bags (4) and the flue gas distribution pipe (31) inside the cylinder (29) and connected to the ash hopper top plate (1), the fly ash outlet (9) set at the bottom of the cone hopper (30), the flue gas outlet (15) set on the side of the cone hopper (30), and the bottom plate (25) set at the bottom of the ash storage bags (4) and capable of being opened and closed; The top plate (1) of the ash silo is provided with multiple fly ash inlets (2) and flue gas inlets (3). The ash storage bag (4) is connected to the fly ash inlets (2), and the flue gas distribution pipe (31) is connected to the flue gas inlets (3). The flue gas distribution pipe (31) is provided with multiple flue gas holes (16) facing the ash storage bag (4).

2. The fluidized bed fly ash storage silo according to claim 1, characterized in that, The ash storage bag (4) is provided with multiple fixing rings (19) spaced apart along the axial direction. Adjacent fixing rings (19) are connected by a traction rope (18), which is connected to the traction machine (17).

3. A fluidized bed fly ash storage silo according to claim 1, characterized in that, The cylinder (29) includes: an outer cylinder (20), an inner cylinder (22) sleeved on the outside of the outer cylinder (20) and moving along the axial direction of the outer cylinder (20), and a sealing element (21) disposed between the outer cylinder (20) and the inner cylinder (22); the top plate (1) of the ash silo is connected to the outer cylinder (20), and the cone hopper (30) is connected to the inner cylinder (22).

4. A fluidized bed fly ash storage silo according to claim 3, characterized in that, Two racks (23) are symmetrically arranged outside the outer cylinder (20) along the axis of the outer cylinder (20). A motor is provided on the outer support, and a gear (24) that meshes with the racks (23) is provided at the output shaft end of the motor.

5. A fluidized bed fly ash storage silo according to claim 3, characterized in that, The inner walls of the inner cylinder (22) and the cone (30) are provided with guide plates (11), and multiple guide grooves (10) are provided on the guide plates (11).

6. A fluidized bed fly ash storage silo according to claim 1, characterized in that, The fly ash inlet (2) is arranged in a circular array along the top plate (1) of the ash silo, and the flue gas inlet (3) is arranged around the fly ash inlet (2).

7. A fluidized bed fly ash storage silo according to claim 6, characterized in that, The flue gas distribution pipe (31) includes: an upper flue gas ring pipe (6), a plurality of vertical branch pipes (5) connected to the upper flue gas ring pipe (6), and a lower flue gas ring pipe (8) connected to the bottom of the upper flue gas ring pipe (6) through a flue gas connecting pipe (7). The top of the vertical flue gas branch pipe (5) is connected to the fly ash inlet (2); the upper flue gas ring pipe (6) is located above the cone hopper (30), and the horizontal height of the lower flue gas ring pipe (8) is above the flue gas outlet (15).

8. A fluidized bed fly ash storage silo according to claim 7, characterized in that, The vertical flue gas branch pipe (5) is provided with a plurality of flue gas holes (16) at intervals. The flue gas holes (16) on the upper flue gas ring pipe (6) and the lower flue gas ring pipe (8) are located below the center line of the upper flue gas ring pipe (6) and the lower flue gas ring pipe (8).

9. A fluidized bed fly ash storage silo according to claim 1, characterized in that, The bottom of the ash storage bag (4) is hinged to the bottom plate (25), and the bottom of the ash storage bag (4) is connected to the support plate (26). A pneumatic telescopic rod (14) is hinged between the support plate (26) and the bottom plate (25).

10. A fluidized bed fly ash storage silo according to claim 1, characterized in that, A filter layer (27) is provided at the flue gas outlet (15), and a cleaning nozzle (28) is provided at the filter layer (27). The blowing direction of the cleaning nozzle (28) is towards the filter layer (27).

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