Ash deposition prevention device and flue system

Abstract

The utility model discloses an ash deposition prevention device and a flue system, the ash deposition prevention device comprises a plurality of disturbance assemblies arranged in a flue at intervals, in each disturbance assembly, an air inlet pipe with controllable on-off is inserted into the side portion of the flue and is in sealing fit with the flue, and the on-off of the air inlet pipe can realize the on-off of the inside and outside of the flue. An ash sealing cover and a protective net are arranged at the two ends of the air inlet pipe, the ash sealing cover is located in the flue, the air inlet pipe is communicated so that airflow outside the flue can flow to the multiple disturbance through holes from the protective net, the multiple disturbance through holes promote airflow flowing in different directions, flowing of particles or accumulated ash is promoted, and the accumulated ash is reduced. The dust sealing cover is provided with an anti-blocking part, the anti-blocking part expands outwards relative to the air inlet pipe and surrounds the end, located in the flue, of the air inlet pipe in the circumferential direction, the blocking possibility of the disturbance through hole is reduced, the protective net can reduce the situation that large obstacles or particles enter the disturbance through hole and the flue, and the blocking frequency and the maintenance frequency are reduced. The technical problems that an accumulated dust cleaning device is frequently maintained and the accumulated dust treatment efficiency is not ideal enough are solved to a certain extent.

Description

Technical Field

[0001] The present application belongs to the technical field of flue gas and flue technology, and in particular relates to an anti-ash deposition device and a flue system. Background Art

[0002] The flue is a tubular device for exhaust gas and smoke emission. The flue is also set in the sintering machine to play the role of air induction and flue gas flow. During the production process of the sintering machine, the high-temperature dusty flue gas enters the machine head dust collector through the flue. At the places where the flue changes diameter and bends, the flow of flue gas is blocked, the flow rate of flue gas decreases, and dust particles of a certain mass in the flue gas are easy to fall and accumulate under the action of gravity, posing a threat to the load-bearing capacity of the flue. In the case of severe dust accumulation, major production and safety accidents such as flue falling may even occur.

[0003] At present, in order to reduce the impact of ash accumulation on the flue of the sintering machine, a nozzle connected to the flue is set at one end. The nozzle extracts the ash in the flue and then flows out from the other end of the nozzle to reduce the ash accumulation in the flue. However, the nozzle is easy to clog and requires frequent maintenance. In addition, the efficiency of the nozzle spraying ash through the end is not ideal, and there will still be a certain amount of ash accumulation in the flue and cause load-bearing. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problems that the dust cleaning device is frequently maintained and the dust treatment efficiency is not ideal. To this end, the present application provides a dust prevention device and a flue system.

[0005] An anti-ash accumulation device provided in an embodiment of the present application is used to prevent ash accumulation in a flue. The anti-ash accumulation device includes a plurality of spaced disturbance components, and the disturbance components include:

[0006] An on-off controllable air intake pipe is inserted into the side of the flue and sealed with the flue, the two ends of the air intake pipe are respectively located inside and outside the flue, and one end located inside the flue is provided with a plurality of disturbance through holes;

[0007] The ash sealing cover and the protection net are respectively covered at the two ends of the air inlet pipe. The ash sealing cover is located in the flue and is provided with an anti-blocking part. The anti-blocking part is spaced from the air inlet pipe and surrounds one end of the air inlet pipe located in the flue.

[0008] In some embodiments, a plurality of the disturbance through holes are spaced apart and distributed in a circle along the circumference of the air intake pipe, and the air intake pipe is provided with at least one circle of the disturbance through holes.

[0009] In some embodiments, n times the cross-sectional area of ​​the disturbance through hole is 0.5-0.75 of the cross-sectional area of ​​the inner hole corresponding to the air inlet pipe, where n is the total number of the disturbance through holes.

[0010] In some embodiments, the ash sealing cover comprises:

[0011] A circular cover body coaxially covers one end connected to the air inlet pipe and has a diameter greater than that of the air inlet pipe;

[0012] The anti-blocking portion is connected to the peripheral wall of the circular cover body and surrounds one end of the air inlet pipe located in the flue along the circumference of the air inlet pipe.

[0013] In some embodiments, the anti-blocking portion is in the shape of an annular plate with an axis extending along the axis of the circular cover body, and the ratio of the inner diameter of the anti-blocking portion to the inner diameter of the air inlet pipe is 1.5-2.

[0014] In some embodiments, the two ends of the anti-blocking portion are respectively a connecting end and an extending end, the connecting end is connected to the peripheral wall of the circular cover body in a circular manner, and the minimum distance between the extending end and the circular cover body is greater than the maximum distance between the disturbance through hole and the circular cover body.

[0015] In some embodiments, the difference between the minimum distance between the extension end and the circular cover body and the maximum distance between the disturbance through hole and the circular cover body is equal to the diameter of the disturbance through hole.

[0016] In some embodiments, the disturbance component includes:

[0017] A plurality of mechanical valves and electric control valves arranged at intervals in the intake pipe to control the intake pipe passage;

[0018] A pressure sensor is provided in the intake pipe.

[0019] The present application provides a flue system, the flue system comprising:

[0020] Flue;

[0021] As described above in the dust accumulation prevention device, a plurality of disturbance components are arranged in the flue at equal intervals along the axial direction of the flue.

[0022] In some embodiments, the air inlet pipe is a straight pipe, and the axial length of the air inlet pipe in the flue is less than the distance between two adjacent disturbance components.

[0023] Advantageous effects provided by one or more embodiments of the present application:

[0024] The anti-ash accumulation device can be used to prevent ash accumulation in the flue. The anti-ash accumulation device includes a plurality of disturbance components arranged at intervals in the flue, and in each disturbance component, the air intake pipe is inserted into the side of the flue and is sealed with the flue to achieve the connection of the air intake pipe without affecting the normal use of the flue. The on-off controllable air intake pipe can choose to connect or cut off the passage between the two ends, so that the inside of the flue and the outside of the flue can be connected through the air intake pipe. The two ends of the air intake pipe are respectively located inside and outside the flue, and a plurality of disturbance through holes are provided at one end of the flue. When the pressure inside and outside the flue is different, after the air intake pipe is connected, a pressure difference airflow will be formed at the two ends of the air intake pipe. The pressure difference airflow drives the gas flow in the flue, and the airflow flowing in the flue drives the ash or particles on the inner wall of the flue to flow. When there is gas flow in the flue itself, the ash and particles are driven to the part that needs to be discharged, which can reduce the ash accumulation in the flue. An ash sealing cover and a protective net are provided at both ends of the air intake pipe. The ash sealing cover is located in the flue. When the air intake pipe is connected, the airflow can flow from the protective net to the multiple disturbance through holes or flow in the opposite direction. The air intake pipe is provided with multiple disturbance through holes at one end in the flue. The multiple disturbance through holes can promote the flow of airflow from different directions to promote the flow of particles or ash accumulation, and effectively improve the efficiency of placing ash accumulation in the flue. At the same time, the ash sealing cover is provided with an anti-blocking part, which is spaced from the air intake pipe and surrounds one end of the air intake pipe located in the flue. The anti-blocking part and the air intake pipe are located at the same end in the flue. There is a spacing between the multiple disturbance through holes at the end, which will not affect the normal operation of the disturbance through holes. At the same time, the anti-blocking part can also protect the disturbance through holes, reducing the possibility of more particles or dust entering the disturbance through holes during airflow and causing blockage of the disturbance through holes. When the air intake pipe is connected, it can reduce the risk of larger obstacles or particles entering the protective net in the flue, and can also prevent obstacles or particles from blocking the disturbance through holes, effectively reducing the possible blockage of the disturbance component as a whole, and reducing the frequency of maintenance required for the disturbance component and the anti-dust device. To a certain extent, it solves the technical problems that the maintenance of the dust cleaning device is relatively frequent and the dust treatment efficiency is not ideal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic structural diagram of a dust accumulation prevention device in some embodiments or certain embodiments is shown.

[0027] Figure 2 A schematic diagram of the structure of a disturbance component in some embodiments or certain embodiments is shown.

[0028] Figure 3 A schematic cross-sectional view of a disturbance assembly in some embodiments or certain embodiments is shown.

[0029] Figure 4 A schematic structural diagram of a flue system in some embodiments or certain embodiments is shown.

[0030] Figure numerals: 1. disturbance component; 11. air intake pipe; 111. disturbance through hole; 12. ash sealing cover; 121. circular cover body; 122. anti-clogging part; D1. diameter of the anti-clogging part; D2. diameter of the inner hole corresponding to the air intake pipe; 13. protective net; 14. mechanical valve; 15. electric control valve; 16. pressure sensor; H. axial length of the air intake pipe in the flue; D. spacing between two adjacent disturbance components; 10. flue; 101. side; 102. curved section; 20. dust collector; 100. dust. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0036] Figure 1 A schematic diagram of the structure of a dust accumulation prevention device in some embodiments or certain embodiments is shown. Figure 2 FIG. 1 shows a schematic diagram of a structure of a disturbance component in some embodiments or certain embodiments, referring to FIG. Figure 1 and Figure 2 The embodiment of the present application provides an anti-ash accumulation device, which is used to prevent ash accumulation in a flue 10. The anti-ash accumulation device includes a plurality of spaced disturbance components 1, and the disturbance component 1 includes:

[0037] The on-off controllable air intake pipe 11 is inserted into the side 101 of the flue 10 and sealed with the flue 10. The two ends of the air intake pipe 11 are respectively located inside and outside the flue 10, and the end located inside the flue 10 is provided with a plurality of disturbance through holes 111.

[0038] The ash sealing cover 12 and the protection net 13 are respectively covered at both ends of the air inlet pipe 11. The ash sealing cover 12 is located in the flue 10 and is provided with an anti-blocking part 122. The anti-blocking part 122 is spaced from the air inlet pipe 11 and surrounds one end of the air inlet pipe 11 located in the flue 10.

[0039] The anti-ash accumulation device can be used to prevent ash accumulation in the flue 10. The anti-ash accumulation device includes a plurality of disturbance components 1 arranged at intervals in the flue 10, and in each disturbance component 1, an air intake pipe 11 is inserted into a side portion 101 of the flue 10 and is sealed with the flue 10 to achieve connection of the air intake pipe 11 without affecting the normal use of the flue 10. The on-off controllable air intake pipe 11 can choose to connect or cut off the passage between the two ends, so that the inside of the flue 10 and the outside of the flue 10 can be connected through the air intake pipe 11. The two ends of the air intake pipe 11 are respectively located inside and outside the flue 10, and a plurality of disturbance through holes 111 are provided at one end of the flue 10. When the pressures inside and outside the flue 10 are different, after the air intake pipe 11 is connected, a pressure difference airflow will be formed at both ends of the air intake pipe 11. The pressure difference airflow drives the gas flow in the flue 10, and the airflow flowing in the flue 10 drives the ash or particles on the inner wall of the flue 10 to flow. When there is gas flow in the flue 10 itself, the ash and particles are driven to the location where they need to be discharged, thereby reducing the ash accumulation in the flue 10. Both ends of the air intake pipe 11 are provided with an ash sealing cover 12 and a protective net 13. The ash sealing cover 12 is located in the flue 10. When the air intake pipe 11 is connected, the airflow can flow from the protective net 13 to the multiple disturbance through holes 111 or flow in the opposite direction. The air intake pipe 11 is provided with a plurality of disturbance through holes 111 at one end in the flue 10. The plurality of disturbance through holes 111 can promote the flow of airflow from different directions to promote the flow of particles or ash accumulation, and effectively improve the efficiency of placing ash accumulation in the flue 10. At the same time, the ash sealing cover 12 is provided with an anti-blocking portion 122. The anti-blocking portion 122 is spaced from the air intake pipe 11 and surrounds one end of the air intake pipe 11 located in the flue 10. Then, the anti-blocking portion 122 is spaced from the air intake pipe 11 and surrounds the end of the air intake pipe 11 located in the flue 10. There is a spacing between the multiple disturbance holes 111 at one end of the tube 11 in the flue 10, which will not affect the normal operation of the disturbance holes 111. At the same time, the anti-blocking part 122 can also protect the disturbance holes 111, reducing the possibility of more particles or dust entering the disturbance holes 111 during airflow and causing the disturbance holes 111 to be blocked. When the air intake pipe 11 is connected, it can reduce the large obstacles or particles entering the protective net 13 in the flue 10, and can also prevent obstacles or particles from blocking the disturbance holes 111, effectively reducing the possible blockage of the disturbance component 1 as a whole, and reducing the frequency of maintenance required for the disturbance component 1 and the anti-dust device. To a certain extent, it solves the technical problems that the device for cleaning dust accumulation is frequently maintained and the dust accumulation treatment efficiency is not ideal.

[0040] It should be noted that the side portion 101 of the flue 10 is a portion on one side of the flue 10 in the circumferential direction. According to the use requirements, the air intake pipe 11 can be inserted into the lateral part of the flue 10 where dust is easily accumulated. For example, the side of the flue 10 close to the ground in the circumferential direction is more prone to dust accumulation. In this case, the air intake pipe 11 can be set on the side of the flue 10 close to the ground. The air intake pipe 11 is inserted into the flue 10 horizontally or at an angle with the gravity direction. The air intake pipe 11 can also promote the flow of air in the flue 10 and reduce the dust accumulation in the flue 10. The disturbance through hole 111 provided at one end of the air intake pipe 11 in the flue 10 is a through hole structure that radially penetrates the air intake pipe 11 and connects the inner peripheral wall and the outer peripheral wall of the air intake pipe 11. The inner peripheral wall and the outer peripheral wall of the air intake pipe 11 are two peripheral walls of the air intake pipe 11 with different diameters, and the peripheral wall with the smaller diameter is the inner peripheral wall.

[0041] Figure 1 Part of the disturbance component 1 disposed in the flue 10 is not shown. Figure 2 The arrow in the figure indicates the flow direction of an airflow in the air inlet pipe 11, and the dotted line indicates the dust 100 that may be deposited in the flue 10. The dust 100 is dust or particles. The height of the dust 100 is only for illustration and is not used to limit the specific use of the disturbance component 1.

[0042] It should be noted that generally, the flue 10 is under negative pressure. Therefore, when the air intake pipe 11 connects the flue 10 with the outside of the flue 10, the gas outside the flue 10 will automatically enter the flue 10 through the air intake pipe 11 under the action of the pressure difference, and will be ejected from the disturbance through hole 111 of the air intake pipe 11 into the flue 10, blowing away the ash and particles that may be deposited on the wall of the flue 10. A pump or blower that promotes gas flow can also be added to the end of the air intake pipe 11 where the protective net 13 is provided. The following description will be based on the situation that the flue 10 is under negative pressure and the airflow enters the flue 10 from the outside of the flue 10 through the air intake pipe 11.

[0043] In some embodiments, each disturbance through hole 111 may be arranged along the radial direction of the air intake pipe 11, which is convenient for preparation and has a better effect of reducing dust accumulation. The axis of the disturbance through hole 111 may not intersect with the axis of the air intake pipe 11, which can also play a certain effect of reducing dust accumulation and can blow away dust or particles in different directions.

[0044] In some embodiments, the plurality of disturbance through holes 111 are spaced apart and distributed in a circle along the circumference of the air intake pipe 11 , and the air intake pipe 11 is provided with at least one circle of disturbance through holes 111 .

[0045] A plurality of disturbance through holes 111 are spaced along the circumference of the air intake pipe 11, and form a circle of disturbance through holes 111 surrounding the air intake pipe 11. The aperture of the disturbance through hole 111 is smaller than the inner hole of the air intake pipe 11. When the airflow entering the air intake pipe 11 enters the disturbance through hole 111, the flow area is reduced, and the pressure and flow velocity of the airflow are increased. The airflow can be ejected into the flue 10 from the disturbance through hole 111 at a higher flow velocity, and the airflow is ejected into the flue 10 more evenly around the circumference of the air intake pipe 11. The dust and particles at different positions on the peripheral wall of the flue 10 can be driven by the airflow, and then flow to, for example, a dust collector connected to the flue 10, so as to reduce the dust accumulation or the deposition of particles on the flue 10 better, and effectively reduce the possibility of dust accumulation in the flue 10. The air intake pipe 11 is provided with at least one circle of disturbance through holes 111, which can also increase the area of ​​the airflow outflow in the axial direction of the air intake pipe 11, and can further reduce the possibility of dust accumulation.

[0046] It should be noted that the plurality of disturbance through holes 111 are spaced apart and distributed in a circle along the circumference of the air intake pipe 11 , which means that an ellipse or a circle can be obtained by fitting and connecting the centers of one end of the plurality of disturbance through holes 111 .

[0047] In some embodiments, a plurality of disturbance holes 111 are distributed at equal intervals along the circumference of the air inlet pipe 11. The air inlet pipe 11 is located at one end in the flue 10 and may be provided with 1 to 3 circles of disturbance holes 111. The airflow may be ejected in many directions, and the ejection direction of the airflow may also be controlled by controlling the position of the air inlet pipe 11. The plurality of disturbance holes 111 may also be distributed in an array at one end of the air inlet pipe 11 in the flue 10.

[0048] In some embodiments, n times the cross-sectional area of ​​the disturbance through hole 111 is 0.5-0.75 of the cross-sectional area of ​​the corresponding inner hole of the intake pipe 11 , where n is the total number of the disturbance through holes 111 .

[0049] The relationship between the cross-sectional area of ​​the disturbance through hole 111 and the cross-sectional area of ​​the corresponding inner hole of the air inlet pipe 11 is within the above range. The airflow velocity and pressure ejected from the disturbance through hole 111 are relatively high, which can effectively blow away particles and ash accumulation, and reduce the possibility of ash accumulation in the flue 10.

[0050] It should be noted that the cross-sectional area is the area of ​​the cross section. The cross section of a hole in the present application is the cross section of the hole taken perpendicular to the axial direction of the corresponding hole.

[0051] In some embodiments, the cross-sectional area corresponding to the disturbance through hole 111 and the cross-sectional area of ​​the inner hole corresponding to the intake pipe 11 may not be within the above range. The cross-sectional area of ​​the disturbance through hole 111 is smaller than the cross-sectional area of ​​the inner hole corresponding to the intake pipe 11, which can also increase the flow rate and pressure of the airflow ejected from the disturbance through hole 111 to reduce the possibility of dust accumulation.

[0052] Figure 3A cross-sectional schematic diagram of a disturbance component in some embodiments or certain embodiments is shown, with reference to Figure 2 and Figure 3 In some embodiments, the ash sealing cover 12 may include:

[0053] The circular cover 121 coaxially covers one end connected to the air inlet pipe 11 and has a diameter greater than that of the air inlet pipe 11 .

[0054] The anti-blocking portion 122 is connected to the peripheral wall of the circular cover 121 and surrounds one end of the air inlet pipe 11 located in the flue 10 along the circumferential direction of the air inlet pipe 11 .

[0055] The structure is relatively simple, and it is easy to realize the spacing and surrounding arrangement of the anti-blocking part 122 and the air inlet pipe 11, and the effect of preventing the disturbance through hole 111 is also good. Moreover, the anti-blocking part 122 surrounds the end of the air inlet pipe 11 in the flue 10 along the circumferential direction, and the airflow flowing out of the disturbance through hole 111 on the air inlet pipe 11 will also be guided by the anti-blocking part 122, so that the airflow can be evenly sprayed around one end of the air inlet pipe 11, blowing away the air and particles, and reducing the probability of dust accumulation in the flue 10.

[0056] It should be noted that Figure 3 Can be Figure 2 A schematic cross-sectional view of the disturbance assembly 1 shown in FIG. Figure 1 and Figure 2 In FIG. 1 , the ash sealing cover 12, the anti-blocking part 122 and the air intake pipe 11 are shown in lines. Figure 3 The structure of the anti-blocking portion 122 and the air intake pipe 11 is fully shown in the middle.

[0057] In some embodiments, the anti-blocking portion 122 is in the shape of an annular plate with an axis extending along the axis of the circular cover body 121 , and the ratio of the inner diameter D1 of the anti-blocking portion 122 to the inner diameter D2 of the air inlet pipe 11 is 1.5-2.

[0058] The axis of the anti-blocking portion 122 extends along the axis of the circular cover body 121, that is, the axis of the anti-blocking portion 122 can extend along the axis of one end of the air inlet pipe 11 in the flue 10. The ratio of the inner diameter D1 of the anti-blocking portion 122 to the inner diameter D2 of the air inlet pipe 11 is within the above range. When the airflow flows from the disturbance through hole 111 into the flue 10, there is a larger space for flow. The anti-blocking portion 122 also has a better guiding effect on the airflow flowing out of the disturbance through hole 111, which is beneficial to reduce the possibility of dust accumulation in the flue 10.

[0059] In some embodiments, the anti-blocking portion 122 may also be conical, and the conical anti-blocking portion 122 is annularly connected to the peripheral wall of the circular cover body 121. The ratio of the diameter D1 of the anti-blocking portion 122 to the diameter of the air intake pipe 11 may not be within the above range, which can also play a better effect of reducing ash accumulation in the flue 10.

[0060] In some embodiments, the two ends of the annular plate-shaped anti-blocking portion 122 are respectively a connecting end and an extending end, the connecting end is connected to the peripheral wall of the circular cover body 121, and the minimum distance between the extending end and the circular cover body 121 is greater than the maximum distance between the disturbance hole 111 and the circular cover body 121.

[0061] The anti-clogging portion 122 is connected in the above manner, has a compact structure, and is relatively simple to prepare. The minimum distance between the extension end and the circular cover body 121 is greater than the maximum distance between the disturbance through hole 111 and the circular cover body 121, which can effectively reduce the situation where dust enters the disturbance through hole 111, thereby reducing the possibility of the disturbance component 1 requiring maintenance.

[0062] In some embodiments, the difference between the minimum distance between the extension end and the circular cover 121 and the maximum distance between the disturbance through hole 111 and the circular cover 121 is equal to the diameter of the disturbance through hole 111. The airflow out of the disturbance through hole 111 can be effectively guided, and the dust accumulation into the disturbance through hole 111 can be reduced, so as to reduce the possibility of the disturbance assembly 1 requiring maintenance.

[0063] In some embodiments, the ash sealing cover 12 may also be configured as a disc-shaped or rectangular plate-shaped or rectangular block-shaped main body, the main body covers one end of the air inlet pipe 11 located in the flue 10, the anti-blocking portion 122 is connected around the main body along the circumference of the air inlet pipe 11, the cross-section of the anti-blocking portion 122 may be ring-shaped or frame-shaped, and the main body may be an integral structure. One end of the ring-shaped or frame-shaped anti-blocking portion 122 may also be connected to the peripheral wall of the circular cover body 121 or the main body, or the edge portion extending relative to the air inlet pipe 11, and the present application does not limit this.

[0064] In some embodiments, the disturbance component 1 may further include:

[0065] A plurality of mechanical valves 14 and an electrically controlled valve 15 are disposed at intervals in the intake pipe 11 to control a passage of the intake pipe 11 .

[0066] A pressure sensor 16 is provided in the intake pipe 11 .

[0067] Both the mechanical valve 14 and the electric control valve 15 can control the on-off of the intake pipe 11 , and can be electrically controlled or manually operated, and can also operate the intake pipe 11 according to the pressure of the intake pipe 11 detected by the pressure sensor 16 , which is beneficial to improving the convenience of the disturbance component 1 .

[0068] In some embodiments, both the mechanical valve 14 and the electric control valve 15 can be located outside the flue 10, the mechanical valve 14 can be a manual valve, the mechanical valve 14 can be an electric valve, and the pressure sensor 16 can be arranged between the mechanical valve 14 and the electric control valve 15. It is convenient to observe the pressure of the pressure sensor 16, and the manual valve and the electric valve can meet manual operation and automatic operation respectively. The operation is more convenient.

[0069] In some embodiments, the disturbance component 1 may also include a detector for detecting the pressure in the flue 10. The pressure sensor 16 may be a pressure detection instrument or a pressure transmitter, etc., and is used to detect the pressure of the portion where the air intake pipe 11 is connected to the flue 10. The electric valve is electrically connected to the pressure sensor 16, and is also electrically connected to a detector (not shown in the figure) for detecting the pressure in the flue 10. When there is dust accumulation in the flue 10, the pressure of the portion where the air intake pipe 11 is connected to the flue 10 will change, and will differ from the normal pressure in the flue 10. The pressure of the portion where the air intake pipe 11 is connected to the flue 10 is marked as F2, and the pressure in the flue 10 is marked as F1. The air intake pipe 11 can be opened when F2=1 / 3~1 / 2F1, and closed when F2=2 / 3~1F2, so as to effectively prevent the dust accumulation and sedimentation in the flue 10.

[0070] In some embodiments, the air intake pipe 11 may be provided with only one control valve, and the control valve may be a mechanical valve 14 or an electric control valve 15. This application does not impose any limitation on this.

[0071] In some embodiments, the ash sealing cover 12 and the air intake pipe 11 may be welded, and the connection strength is relatively high. The protective net 13 may be a wire mesh or a high temperature resistant net, etc. The protective net 13 and the air intake pipe 11 may be detachably connected by fasteners, or the protective net 13 and the air intake pipe 11 may be welded. This is beneficial to improving the service life of the disturbance component 1.

[0072] In some embodiments, the air inlet pipe 11 may be a straight pipe or a curved pipe.

[0073] Figure 4 A schematic diagram of the structure of a flue system in some embodiments or certain embodiments is shown, referring to Figure 4 Based on the same inventive concept, the present application provides a flue system, the flue system comprising:

[0074] Flue 10.

[0075] As described above, in the dust accumulation prevention device, a plurality of disturbance components 1 are arranged in the flue 10 at equal intervals along the axial direction of the flue 10 .

[0076] The structure and effect of the dust prevention device can be referred to above, and will not be described in detail here. A plurality of disturbance components 1 are arranged in the flue 10 at equal intervals along the axial direction of the flue 10, which can effectively reduce the possibility of dust accumulation in the flue 10.

[0077] It should be noted that when the anti-ash accumulation device has been installed on the flue 10, when installing the flue system, the position of the flue 10 and the anti-ash accumulation device can be adjusted according to actual needs, so that the anti-ash accumulation device can be installed in a position of the flue 10 where ash is easily accumulated. Figure 4 Only the position and number of the disturbance components 1 are shown, and the specific structure of the disturbance components 1 is simplified.

[0078] In some embodiments, the flue 10 may have a diameter-changing section (not shown in the figure) or a curved section 102, where the diameter-changing section is a portion where the flue 10 has a changed diameter, and the curved section 102 is a portion where the flue 10 has a curved shape. Each diameter-changing section and curved section 102 of the flue 10 may be provided with an anti-ash accumulation device, which can effectively prevent ash accumulation at the curved or diameter-changing portion of the flue 10.

[0079] In some embodiments, the air inlet pipe 11 is a straight pipe, and the axial length of the air inlet pipe 11 in the flue 10 is less than the distance between two adjacent disturbance components 1 , which is beneficial to reduce the possibility of dust accumulation in the flue 10 .

[0080] In some embodiments, the air inlet pipe 11 is a straight pipe, one end of which can be inserted into the flue 10 axially perpendicular to the flue 10, and the extended end of the anti-blocking part 122 in the ash sealing cover 12 is opposite to the peripheral wall of the flue 10. The anti-blocking part 122 can guide the airflow to the peripheral wall of the flue 10, and the airflow blows away the ash and particles that are easily deposited within the peripheral wall of the flue 10, effectively reducing the ash accumulation in the flue 10.

[0081] In some embodiments, the air inlet pipe 11 is a straight pipe, and one end of the air inlet pipe 11 can be inserted into the flue 10 axially perpendicular to the flue 10. In each dust prevention device, the axial length of the air inlet pipe 11 in the flue 10 is H, and the distance between two adjacent disturbance components 1 is D. H and D can satisfy the following formula:

[0082] D = 2H / tanβ.

[0083] In the formula, β (not shown in the figure) is the stacking angle of the ash in the flue 10, which is also the maximum angle (the angle of a single side to the horizontal plane) at which the ash can maintain a natural stable state when stacked, also known as the repose angle. The specific parameters of β can be obtained by measurement or multiple tests.

[0084] In some embodiments, the flue 10 through which people can pass can be provided with a switch door (not shown in the figure), and the side 101 of the flue 10 can be provided with a plug hole (not shown in the figure) corresponding to the air inlet pipe 11. After the air inlet pipe 11 is inserted into the flue 10 through the plug hole, one end of the air inlet pipe 11 is manually connected to the ash sealing cover 12. Alternatively, after the plug hole is provided on the flue 10, the ash sealing cover 12 of the disturbance device is inserted into the flue 10, and the peripheral wall of the air inlet pipe 11 and the flue 10 can be sealed by welding, or tightly connected by a flange (not shown in the figure), a fastener and a sealing ring.

[0085] In some embodiments, one end of the flue 10 can be connected to other equipment or devices that require smoke exhaust, and the other end of the flue 10 can be connected to equipment such as a dust collector 20. The dust collector 20 can extract gas from the flue 10 to create a negative pressure in the flue 10.

[0086] It should be noted that the parallel or perpendicular involved in this application is relative to the concept of absolute parallel or absolute perpendicular in geometry, and a deviation of 0 to 5 degrees is allowed. The axial direction is the direction in which the axis of the corresponding structure extends, and the radial direction is the direction in which a certain diameter of the corresponding structure extends. This application does not impose any restrictions on this.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0088] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0089] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A dust accumulation prevention device, characterized in that: Applied to prevent dust accumulation in a flue, the anti-dust accumulation device comprises a plurality of disturbance components arranged at intervals in the flue, and the disturbance components comprise: An on-off controllable air intake pipe is inserted into the side of the flue and sealed with the flue, the two ends of the air intake pipe are respectively located inside and outside the flue, and one end located inside the flue is provided with a plurality of disturbance through holes; The ash sealing cover and the protection net are respectively covered at the two ends of the air inlet pipe. The ash sealing cover is located in the flue and is provided with an anti-blocking part. The anti-blocking part is spaced from the air inlet pipe and surrounds one end of the air inlet pipe located in the flue.

2. The dust accumulation prevention device according to claim 1, characterized in that: The plurality of disturbance through holes are spaced apart and distributed in a circle along the circumference of the air intake pipe, and the air intake pipe is provided with at least one circle of disturbance through holes.

3. The dust accumulation prevention device according to claim 2, characterized in that: The cross-sectional area of ​​the disturbance through hole is n times the cross-sectional area of ​​the disturbance through hole, which is 0.5 to 0.75 of the cross-sectional area of ​​the inner hole corresponding to the air intake pipe, and n is the total number of the disturbance through holes.

4. The dust accumulation prevention device according to any one of claims 1 to 3, characterized in that: The ash sealing cover comprises: A circular cover body coaxially covers one end connected to the air inlet pipe and has a diameter greater than that of the air inlet pipe; The anti-blocking portion is connected to the peripheral wall of the circular cover body and surrounds one end of the air inlet pipe located in the flue along the circumference of the air inlet pipe.

5. The dust accumulation prevention device according to claim 4, characterized in that: The anti-blocking portion is in the shape of an annular plate with an axis extending along the axis of the circular cover body. The ratio of the inner diameter of the anti-blocking portion to the inner diameter of the air inlet pipe is 1.5-2.

6. The dust accumulation prevention device according to claim 4, characterized in that: The two ends of the anti-blocking portion are respectively a connecting end and an extending end, the connecting end is connected to the peripheral wall of the circular cover body in a surrounding manner, and the minimum distance between the extending end and the circular cover body is greater than the maximum distance between the disturbance through hole and the circular cover body.

7. The dust accumulation prevention device according to claim 6, characterized in that: The difference between the minimum distance between the extension end and the circular cover body and the maximum distance between the disturbance through hole and the circular cover body is equal to the diameter of the disturbance through hole.

8. The dust accumulation prevention device according to any one of claims 1 to 3, characterized in that: The disturbance component comprises: A plurality of mechanical valves and electric control valves arranged at intervals in the intake pipe to control the intake pipe passage; A pressure sensor is provided in the intake pipe.

9. A flue system, characterized in that: The flue system comprises: Flue; In the dust accumulation prevention device according to any one of claims 1 to 8, a plurality of the disturbance components are arranged in the flue at equal intervals along the axial direction of the flue.

10. The flue system according to claim 9, characterized in that: The air inlet pipe is a straight pipe, and the axial length of the air inlet pipe in the flue is smaller than the distance between two adjacent disturbance components.

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