An air cannon device to prevent duct blockage caused by flue gas velocity fluctuations.

Abstract

This utility model discloses an air cannon device to prevent duct blockage caused by flue gas velocity fluctuations, relating to the field of industrial ventilation and duct unblocking technology. It includes an air cannon body for storing compressed air and a stackable flue for conveying flue gas. The air outlet of the air cannon body is connected to the interior of the stackable flue via a pipe body. The pipe body is equipped with a solenoid valve electrically connected to a continuous emission monitoring device. The stackable flue contains at least one anti-clogging component. This utility model achieves automation by integrating the solenoid valve with existing continuous emission monitoring systems, eliminating the need for manual attention and frequent operation, significantly reducing manpower consumption, labor costs, and safety hazards. The periodic blowing of compressed air, combined with turbulence, effectively disperses accumulated dust, which is carried away by the flue gas, reducing duct dust accumulation, preventing flue blockage, and ensuring stable system operation.

Description

Technical Field

[0001] This utility model relates to the field of industrial ventilation and duct unblocking technology, specifically to an air cannon device to prevent duct blockage caused by flue gas velocity fluctuations. Background Technology

[0002] In industrial flue gas treatment systems, ducts are the core components for flue gas transportation. They play a crucial role in transporting dust-laden flue gas along a preset path to the treatment equipment, where it is then treated and transported to a designated location. Their stable operation is directly related to the production efficiency and safety of the entire industrial project.

[0003] However, in actual operation, the flow velocity of dust-laden flue gas often fluctuates frequently and significantly, posing a serious hidden danger to the duct system. When the flue gas velocity is low, the dust carried in the flue gas lacks kinetic energy and cannot continue to move with the airflow, easily settling and accumulating on the inner wall of the duct. Conversely, when the flue gas velocity increases, it cannot completely flush away the accumulated dust. Over time, the accumulated dust continuously encroaches on the internal flow space of the duct, causing the duct's transport resistance to rise continuously. To maintain normal flue gas transport volume, the fan needs to continuously increase its operating frequency until it reaches full frequency operation, which still cannot meet the system's requirements for flue gas transport. In more severe cases, it can directly cause duct blockage, forcing the entire flue gas treatment system to shut down, resulting in huge economic losses for industrial production.

[0004] To address the aforementioned problem of dust accumulation and blockage in air ducts, existing technologies typically employ the method of installing cleaning holes and doors on easily dust-accumulating duct sections, with regular cleaning performed manually. However, under the actual operating conditions of some industrial production projects, this traditional cleaning method has significant drawbacks: Firstly, the flue gas flow rate in these projects fluctuates extremely unpredictably, potentially experiencing multiple drastic changes within a short period, leading to accelerated dust accumulation within the ducts. This necessitates more frequent cleaning operations by dedicated personnel, resulting in a significant waste of human resources and a substantial increase in labor costs for the enterprise. Secondly, the operating temperature of dust-accumulating duct sections remains consistently high. Even when the pipeline system is operating under negative pressure, operators face serious safety threats when manually cleaning by opening the cleaning holes and doors, with a high risk of burns. Improper operation or sudden changes in operating conditions could even trigger more serious accidents, posing a significant threat to the personal safety of operators. Utility Model Content

[0005] The purpose of this invention is to provide an air cannon device to prevent duct blockage caused by flue gas velocity fluctuations, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations includes an air cannon body for storing compressed air and a stackable flue for conveying flue gas. The air outlet of the air cannon body is connected to the interior of the stackable flue via a pipe body. The pipe body is equipped with a solenoid valve electrically connected to a continuous flue gas emission monitoring device. The interior of the stackable flue is provided with at least one anti-clogging component. At least one blow hole is opened through the surface of the stackable flue. The blow hole is connected to the end of the pipe body away from the air cannon body. The anti-clogging component has two extensions, which extend to both sides of the blow hole.

[0008] Preferably, the anti-clogging component has a bent portion that corresponds to the axial direction of the blow hole, and the two extension portions extend obliquely from the bent portion to both sides of the blow hole.

[0009] Preferably, the top of the air cannon body is provided with a first switch for controlling the air passage, and one end of the first switch is connected to a local pressure gauge.

[0010] Preferably, the bottom of the air cannon body is provided with a second switch for controlling the air passage.

[0011] Preferably, both the first and second on / off components are ball valves.

[0012] Preferably, the pipeline body includes a main pipeline connected to the air outlet end of the air cannon body, a branch pipeline connected to one end of the main pipeline, and multiple connecting pipelines connected to the bottom of the easily stackable flue. The main pipeline is connected to the multiple connecting pipelines one by one through multiple flanges on the branch pipelines.

[0013] Preferably, the plurality of connecting pipes correspond one-to-one with the plurality of blow holes and are interconnected.

[0014] Preferably, five anti-clogging components are provided, and the five anti-clogging components are arranged in an array along the length of the easy-to-stall flue.

[0015] Preferably, the anti-clogging component is made of angle steel.

[0016] Preferably, the surface of the easy-to-stall flue is provided with a dust removal door.

[0017] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0018] In this invention, an automated program is formed by the electromagnetic valve and the existing continuous emission monitoring system for flue gas. This eliminates the need for special human attention and frequent operation, significantly reducing human resource consumption and labor costs. By periodically blowing compressed air, combined with turbulence, accumulated dust can be effectively dispersed and carried away by the flue gas, reducing the degree of dust accumulation in the duct and preventing blockage of the flue. This achieves a preventative technical effect and ensures stable system operation. Furthermore, the automatic dust removal method eliminates the need for manual dust removal under high-temperature conditions, completely eliminating safety risks such as burns caused by high-temperature environments and improving operational safety.

[0019] In this invention, the use of angle steel structure prevents the nozzle from becoming clogged, ensuring the device can function stably for a long time. The overall structure of the device is simple and easy to inspect and maintain. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the easy-to-stall flue of this utility model;

[0022] Figure 3 This is a schematic diagram of the pipe body structure of this utility model;

[0023] Figure 4 This is a flowchart illustrating the present invention.

[0024] In the diagram: 1. Air cannon body; 2. Easily stackable flue; 3. Pipe body; 31. Main pipe; 32. Branch pipe; 33. Connecting pipe; 4. Solenoid valve; 5. Anti-clogging component; 6. Blowing hole; 7. First on / off component; 8. Local pressure gauge; 9. Second on / off component; 10. Ash removal door. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to embodiments:

[0026] like Figures 1-4 As shown, this utility model provides an air cannon device to prevent duct blockage caused by flue gas velocity fluctuations. It includes an air cannon body 1 for storing compressed air and a stackable flue 2 for conveying flue gas. The air outlet of the air cannon body 1 is connected to the interior of the stackable flue 2 through a pipe body 3. The pipe body 3 is equipped with a solenoid valve 4 electrically connected to a continuous flue gas emission monitoring device. The interior of the stackable flue 2 is provided with at least one anti-clogging component 5. At least one blow hole 6 is opened through the surface of the stackable flue 2. The blow hole 6 is connected to the end of the pipe body 3 away from the air cannon body 1. The anti-clogging component 5 has two extensions, which extend to both sides of the blow hole 6.

[0027] It should be noted that in this invention, the air cannon is the preferred embodiment for storing compressed air. It can also be replaced by commercially available equipment such as air tanks or air distributors with equivalent air storage and supply functions. Furthermore, the compressed air storage device can be placed anywhere near the injection point and transported to the bottom of the easily stackable flue 2 via the pipe body 3. If an insulated flue is involved, the pipe body 3 can even be encased in an insulation layer. Simultaneously, the control valve linked to the monitoring equipment is preferably a solenoid valve 4, but it can also be replaced by other valves with intelligent opening and closing control functions. When using a solenoid valve 4, the operator can set the working interval of the solenoid valve 4 to achieve intermittent injection. It should also be noted that the above-mentioned replacement components are all mature commercially available products that can be directly purchased and adapted, ensuring that this invention can be flexibly selected according to actual working conditions, improving the applicability and economy of the solution.

[0028] It is worth noting that this solution aims to protect the physical structure, but does not protect the circuitry and program control. The mention of the processing circuitry and program control in this paper is merely to supplement the feasibility and authenticity of this utility model, and this utility model does not seek protection for the circuitry and program control technology. Furthermore, the continuous emission monitoring equipment for flue gas mentioned in this utility model directly adopts a part of the industrial flue gas treatment system, which is already known and disclosed technology in the field. This paper will not elaborate on it in detail, and although it will not elaborate on it in detail, those skilled in the art will be able to understand and apply it based on their professional knowledge.

[0029] Furthermore, such as Figure 2 As shown, the anti-clogging component 5 has a bent portion, which corresponds to the axial direction of the blow hole 6, and two extension portions extend obliquely from the bent portion to both sides of the blow hole 6. By having an anti-clogging component 5 with one bent portion and two extension portions, when the ash in the easy-to-stall flue 2 falls under the action of gravity, it will be guided to the surface of the anti-clogging component 5 to form a concentrated accumulation, thereby blocking the path of the ash falling directly to the blow hole 6, effectively reducing the risk of blockage of the blow hole 6, and reducing the frequency of manual cleaning of the blow hole 6; and when compressed air enters the easy-to-stall flue 2 through the pipe body 3 for blowing, the blown gas can effectively disperse the dust accumulated on the back of the anti-clogging component 5 and form local turbulence in the flue, so that the dispersed dust is transported to the subsequent processing stage along with the mainstream flue gas.

[0030] Specifically, when compressed air is ejected from the blow hole 6, a high-speed airflow is formed. When this high-speed airflow comes into contact with the anti-clogging component 5, it flows along the surface of the anti-clogging component 5 and generates a flow around it. At the same time, a local high-pressure area is formed around the anti-clogging component 5. As a result, the flow around it and the high pressure will impact and disturb the dust accumulated on the back of the anti-clogging component 5, causing the dust particles to be lifted off the surface of the anti-clogging component 5 by the force of the airflow. They are then transported away by the flue gas, thereby achieving the dispersion of dust on the back of the anti-clogging component 5.

[0031] Furthermore, the anti-clogging component 5 is made of angle steel, which is a commercially available standard part that can be directly purchased and used in this device. This not only simplifies the assembly process but also significantly reduces the cost of obtaining components and the overall manufacturing cost.

[0032] Furthermore, such as Figure 1 As shown, the top of the air cannon body 1 is equipped with a first on / off element 7 for controlling the on / off of the air passage. One end of the first on / off element 7 is connected to a local pressure gauge 8. The bottom of the air cannon body 1 is equipped with a second on / off element 9 for controlling the on / off of the air passage. Specifically, the first on / off element 7 and the second on / off element 9 control the on / off of the air passages at the top and bottom of the air cannon body 1, respectively. Therefore, in actual use, operators can flexibly open or close the air passages at different locations according to actual needs, avoiding unnecessary gas leakage or misflow, ensuring that the air passage system of the air cannon device operates stably according to the preset logic, and providing reliable air source control for actions such as spraying.

[0033] Furthermore, both the first on / off element 7 and the second on / off element 9 are ball valves. It should be noted that ball valves are mature commercially available standard parts that can be directly purchased; and in this technical solution, ball valves are preferred for the first on / off element 7 and the second on / off element 9, but they are not limited to ball valves. They can also be replaced with other valves available on the market that have the same air circuit on / off control function (such as gate valves and globe valves).

[0034] Furthermore, such as Figure 3 As shown, the pipe body 3 includes a main pipe 31 connected to the air outlet of the air cannon body 1, a branch pipe 32 connected to one end of the main pipe 31, and multiple connecting pipes 33 connected to the bottom of the easy-to-stall flue 2. The main pipe 31 is connected to the multiple connecting pipes 33 one by one through multiple flanges on the branch pipe 32. The multiple connecting pipes 33 are connected to multiple blow holes 6 one by one and are interconnected. Five anti-clogging components 5 are provided. The five anti-clogging components 5 are arranged in an array along the length of the easy-to-stall flue 2, and each anti-clogging component 5 corresponds to at least one blow hole 6.

[0035] Specifically, the integrally formed branch pipe 32 has one air inlet and several air outlets, and each air outlet is connected to the corresponding connecting pipe 33. Through the multi-branch decentralized jetting design, compressed air can form multi-point airflow coverage in the easy-to-stall flue 2, which not only effectively improves the comprehensiveness of the jetting area and enhances the turbulence effect, ensuring that the ash accumulation in different locations in the flue can be effectively reduced, but also reduces the frequency of use of the ash cleaning door 10 and ash cleaning hole. Moreover, the overall structure is simple and easy to operate.

[0036] Furthermore, such as Figure 1 As shown, a dust removal door 10 is provided on the surface of the easily stacked material flue 2. The dust removal door 10 is used to provide an operating channel for manual unblocking operations when the easily stacked material flue 2 becomes blocked. It should be noted that the core design purpose of this utility model is to effectively reduce the probability of blockage of the easily stacked material flue 2 through the synergistic effect of air cannon blowing and anti-blocking component 5, achieving a technical effect of prevention first. When the easily stacked material flue 2 still becomes blocked due to extreme working conditions (such as a sudden accumulation of a large amount of dust), the blockage can be handled by relying on the dust removal door 10 and using existing mature manual unblocking measures. This solution does not improve the existing unblocking measures themselves, but only ensures emergency handling capabilities under extreme working conditions by reserving the dust removal door 10, forming a complete guarantee logic of prevention first and unblocking second.

[0037] As an example

[0038] like Figures 1-4 As shown, multiple blow holes 6 are arranged in groups of two, for a total of five groups. Each group of blow holes 6 corresponds one-to-one with an anti-clogging component 5. The two blow holes 6 in each group are arranged close to the two inner walls of the easily piled-up flue 2 (because when dust comes into contact with the inner wall of the flue, it is more likely to accumulate and fall onto the anti-clogging component 5. By setting the blow holes 6 close to the inner wall, the accumulated dust near the inner wall can be cleaned by blowing). The structure of the anti-clogging component 5 prevents the blow holes 6 from clogging, ensuring that the device can function stably for a long time. The branch pipe 32 consists of one main branch pipe and ten secondary branch pipes, and each secondary branch pipe is connected to the corresponding blow hole 6.

[0039] During operation: After the compressed air output from the existing equipment enters the air cannon body 1 for storage, its blowing action is intelligently controlled by the solenoid valve 4 linked to the continuous emission monitoring system (CEMS), that is:

[0040] When the continuous emission monitoring system detects that the flue gas velocity in the easily stackable flue duct 2 is low, the solenoid valve 4 remains closed to avoid unnecessary consumption of compressed air.

[0041] When the continuous emission monitoring system detects that the flue gas velocity in the easy-to-stock flue 2 is large, the solenoid valve 4 automatically enters the periodic opening mode, driving the compressed air in the air cannon body 1 to enter the easy-to-stock flue 2 through the pipeline body 3 for directional blowing.

[0042] Therefore, when compressed air is ejected from the nozzle 6, it forms a high-speed airflow that flows along the surface of the anti-clogging component 5, creating a flow around the dust. This precisely disperses the dust accumulated on the back of the anti-clogging component 5, causing the dust to detach from its surface. At the same time, the high-speed airflow also creates local turbulence in the easy-to-stall flue 2, breaking the dust accumulation inertia. Finally, the dispersed dust is transported to the subsequent treatment stage with the mainstream flue gas in the flue, and is collected and discharged uniformly by the existing dust removal equipment. This not only avoids dust clogging in the flue, but also ensures the continuity of the flue gas treatment process.

[0043] As another embodiment

[0044] There are five blow holes 6, and the five blow holes 6 are arranged in an array along the length of the easy-to-stall flue 2, and correspond one-to-one with each anti-clogging component 5. The blow holes 6 are located below the middle section of the anti-clogging component 5. The branch pipe 32 consists of one main branch pipe and five sub-branch pipes, and each sub-branch pipe is connected to the corresponding blow hole 6.

[0045] During operation: After the compressed air output from the existing equipment enters the air cannon body 1 for storage, its blowing action is intelligently controlled by the solenoid valve 4 linked to the continuous emission monitoring system (CEMS), that is:

[0046] When the continuous emission monitoring system detects that the flue gas velocity in the easily stackable flue duct 2 is low, the solenoid valve 4 remains closed to avoid unnecessary consumption of compressed air.

[0047] When the continuous emission monitoring system detects that the flue gas velocity in the easy-to-stock flue 2 is large, the solenoid valve 4 automatically enters the periodic opening mode, driving the compressed air in the air cannon body 1 to enter the easy-to-stock flue 2 through the pipeline body 3 for directional blowing.

[0048] Therefore, when compressed air is ejected from the nozzle 6, it forms a high-speed airflow that flows along the surface of the anti-clogging component 5, creating a flow around the dust. This precisely disperses the dust accumulated on the back of the anti-clogging component 5, causing the dust to detach from its surface. At the same time, the high-speed airflow also creates local turbulence in the central area of ​​the easy-to-stall flue 2, breaking the dust accumulation inertia. Finally, the dispersed dust is transported to the subsequent treatment stage with the mainstream flue gas in the flue, and is collected and discharged uniformly by the existing dust removal equipment.

[0049] In summary, this utility model, through the integration of the solenoid valve 4 with existing continuous emission monitoring systems, forms an automated program that eliminates the need for special manual attention and frequent operation, significantly reducing manpower consumption and labor costs. Furthermore, the periodic blowing of compressed air, combined with turbulence, effectively disperses accumulated dust, which is then carried away by the flue gas, reducing duct dust accumulation, preventing flue blockage, and ensuring stable system operation. The automatic dust removal method eliminates the need for manual cleaning under high-temperature conditions, completely eliminating safety risks such as burns from high-temperature environments and improving operational safety. Additionally, the angle steel structure prevents the blowing holes 6 from clogging, ensuring long-term stable operation of the device. The overall structure of the device is simple, facilitating inspection and maintenance.

[0050] It is worth noting that this solution aims to protect the physical structure, but does not protect the circuitry and program control. The mention of the processing circuitry and program control in this paper is merely to supplement the feasibility and authenticity of this utility model, and this utility model does not seek protection for the circuitry and program control technology. Furthermore, the continuous emission monitoring equipment for flue gas mentioned in this utility model directly adopts a part of the industrial flue gas treatment system, which is already known and disclosed technology in the field. This paper will not elaborate on it in detail, and although it will not elaborate on it in detail, those skilled in the art will be able to understand and apply it based on their professional knowledge.

[0051] It should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0052] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations, characterized in that: The device includes an air cannon body for storing compressed air and a stackable flue for conveying flue gas. The air outlet of the air cannon body is connected to the interior of the stackable flue via a pipe body. The pipe body is equipped with a solenoid valve electrically connected to a continuous flue gas emission monitoring device. The interior of the stackable flue is equipped with at least one anti-clogging component. The surface of the stackable flue has at least one through-hole. The through-hole is connected to the end of the pipe body away from the air cannon body. The anti-clogging component has two extensions, which extend to both sides of the through-hole.

2. The air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: The anti-clogging component has a bent portion that corresponds to the axial direction of the blow hole, and the two extension portions extend obliquely from the bent portion to both sides of the blow hole.

3. The air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: The top of the air cannon body is provided with a first switch for controlling the air circuit, and one end of the first switch is connected to a local pressure gauge.

4. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 3, characterized in that: The bottom of the air cannon body is provided with a second switch for controlling the air passage.

5. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 4, characterized in that: Both the first and second on / off components are ball valves.

6. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: The pipeline body includes a main pipeline connected to the air outlet of the air cannon body, a branch pipeline connected to one end of the main pipeline, and multiple connecting pipelines connected to the bottom of the easily stackable flue. The main pipeline is connected to the multiple connecting pipelines one by one through multiple flanges on the branch pipelines.

7. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 6, characterized in that: The multiple connecting pipes correspond one-to-one with the multiple blow holes and are interconnected.

8. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: Five anti-clogging components are provided, and the five anti-clogging components are arranged in an array along the length of the easy-to-stall flue.

9. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: The anti-clogging component is made of angle steel.

10. An air cannon device for preventing duct blockage caused by flue gas velocity fluctuations according to claim 1, characterized in that: The surface of the easily stackable flue is equipped with a dust removal door.

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