A dust removal system

Abstract

This invention provides a dust removal system, relating to the field of safe and environmentally friendly decomposition technology of calcium carbide dust. It includes a dust collection branch system, a conveying pipeline system, a dust cleaning and collection system, and the dust cleaning system is used to clean calcium carbide dust inside the conveying pipeline. The dust collection branch system comprises several dust collection branch pipes, with a variable diameter structure at the connection between the dust collection branch pipes and the conveying pipeline system. This invention adopts a novel low-profile, high-climbing wave-shaped conveying pipeline design concept, which can effectively divert dust during the conveying process, reduce the dust content of the conveying system, and maintain efficient system operation.

Description

Technical Field

[0001] This invention relates to the field of safe and environmentally friendly decomposition technology of calcium carbide dust, specifically to a dust removal system. Background Technology

[0002] In chemical industrial production, acetylene preparation processes are divided into dry and wet processes. Most existing enterprises treat calcium carbide dust as ordinary dust for removal. Although explosion-proof measures are considered, this type of operation places all risks within the dust collector. If the dust collector explodes, all the dust inside the collector chamber will escape, causing short-term, high-concentration environmental damage. This type of dust collection has the following characteristics: A large amount of dust collected by the dust collection system falls into the ductwork after the system shuts down. Although the ductwork has a certain slope, the small size of the dust particles means that a large amount of dust will still fall into the ductwork. After the system shuts down, moisture in the air easily combines with the trapped dust to form Ca(OH)2, forming a paste. This paste further reacts with CO2 to form CaCO3 and water. The water then further reacts with the calcium carbide dust, and the cycle repeats. The amount of CaCO3 adhering to and drying on the surface increases, increasing air resistance and further burdening the duct supports, potentially leading to duct collapse and injury accidents. Because the existing dust removal system uses a ramp design, the inlet of the dust removal system is located at the lowest point of the main pipeline. Acetylene gas, a byproduct, has a molecular weight of 26, which is smaller than air's 29, causing it to accumulate within the pipeline and concentrate at higher elevations, preventing its external discharge. As shutdown time increases, the amount of acetylene gas accumulated within the pipeline grows, posing a significant safety hazard. If there is a spark in the environment, an explosion could even occur. Currently, there is no dedicated dust removal system for calcium carbide dust within pipelines in China; therefore, there is an urgent need to design a pipeline dust removal system and process for wet calcium carbide-to-acetylene production. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dust removal system that solves the drawback of the prior art being unable to remove calcium carbide dust in pipelines.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A dust removal system includes a dust collection branch system, a conveying pipeline system, a gas protection system, a dust cleaning system, a dust collection system, a control system, a venting system, and a fire prevention system. The output end of the dust collection branch system is connected to the conveying pipeline system for collecting calcium carbide dust. The conveying pipeline system is used to convey gas containing calcium carbide dust. The gas protection system is used to replace acetylene gas in the calcium carbide dust-containing gas within the conveying pipeline system with inert gas. The dust cleaning system is used to clean the calcium carbide dust within the conveying pipeline system. The dust collection system is located at the end of the conveying pipeline system. The venting system is used to vent acetylene gas from the conveying pipeline system. The fire prevention system is located at the tail end of the conveying pipeline system. The fire system is used to prevent open flames from entering the dust collection system; the control terminals of the dust suction branch system, conveying pipeline system, gas protection system, dust cleaning system, dust collection system, venting system, and fire prevention system are electrically connected to the control system; the dust suction branch system includes several dust suction branch pipes, one end of each of the several dust suction branch pipes is sequentially connected to the conveying pipeline system, and the other end of each dust suction branch pipe is connected to the fan hood. The interface between the dust suction branch pipe and the fan hood is a single interface, a double interface, or a triple interface. The connection angle between the dust suction branch pipe and the conveying pipeline system is ≤30°. The connection between the conveying pipeline system and the dust suction branch pipe is a variable diameter structure, and the diameter of the conveying pipeline system after connecting to the dust suction branch pipe is larger than the diameter before connecting.

[0006] According to a further preferred embodiment of the above technical solution, the conveying pipeline system includes a first conveying pipeline, a second conveying pipeline, and a third conveying pipeline. The first, second, and third conveying pipelines are in multiple sets. The first conveying pipeline is a downhill pipeline with a slope ≤30°. The second conveying pipeline is an uphill pipeline with a slope ≥45°. The third conveying pipeline is a double-bend structure with its ends connected. The high end of the first and second conveying pipelines are connected by a transitional third conveying pipeline, and the low end of the first and second conveying pipelines are connected by a bend transitional pipe.

[0007] Preferably, a dust collection port is provided at the low point connection of the first conveying pipe and the second conveying pipe. The dust collection port is connected to the dust collection system. A detection switch is provided at the dust collection port. The detection switch is used to control the opening and closing of the dust collection port. The detection switch is electrically connected to the control system.

[0008] Preferably, a vent is provided at the high point connection between the first and second conveying pipelines, and a flame arrester is provided on the outside of the vent to prevent backfire at the vent. A valve is provided at the vent to control the opening and closing of the vent, and the valve is electrically connected to the control system.

[0009] Preferably, the dust cleaning system includes dust cleaning pipes and valve control components. Multiple sets of dust cleaning pipes are provided, and the dust cleaning pipes are vertically inserted into the pipes of the conveying pipe system. The multiple sets of dust cleaning pipes are evenly distributed in various sections of the conveying pipe system.

[0010] Preferably, the dust cleaning system includes a dust blowing pipe, which is disposed inside the pipeline of the conveying pipeline system, and the dust blowing pipe is provided with a plurality of blowing holes.

[0011] Preferably, the dust cleaning system is an inert gas cleaning system.

[0012] Preferably, the control system is a DCS control system or a PLC controller system.

[0013] Preferably, the dust extraction branch system and the conveying pipeline system can be connected by welding or by flange connection.

[0014] Preferably, the dust collection system includes a silo and a dust collector, and both the silo and the dust collector are equipped with fire dampers to effectively isolate fire sources and enhance safety.

[0015] Preferably, in addition to adopting explosion-proof facilities, the dust collector also uses inert gas jetting to further reduce safety risks.

[0016] Preferably, the conveying pipeline system further includes a fixed support for fixing the first conveying pipeline, the second conveying pipeline, and the third conveying pipeline.

[0017] A dust removal process for a dust removal system, the dust removal process comprising the following steps:

[0018] Step a: Before starting the system, the venting system is started by controlling the control system. The venting system is used to release the acetylene in the delivery pipeline system to the atmosphere or the acetylene recovery pipeline. After the venting system has been working for a period of time and there is no acetylene gas in the delivery pipeline system, the venting system is shut down.

[0019] Step b, then the gas protection system is started by controlling the control system to release the air in the system by using the negative pressure of the gas protection system. After a period of time, the dust cleaning system is started by controlling the control system to replace the air in the system with inert gas. After the air replacement is qualified, the dust cleaning system is turned off.

[0020] Step c: During system operation, the high-level material level sensor of the unloading system starts the unloading and unloading conveying system, while the low-level material level sensor closes the unloading valve. At the same time, the unloading conveying system is delayed to ensure that there is no dust in the conveying system.

[0021] Step d: Before the system stops, the dust is transported along the conveying pipeline system to the lowest point or end of the pipeline system through the inert gas protection system. The dust conveying system will automatically start according to step c and gradually clean the dust in the conveying pipeline system in sections through the automatic control dust cleaning system. The dust is collected and transferred by the dust collection system. After cleaning one end for a period of time until there is no calcium carbide dust in the conveying pipeline system, the dust cleaning system and the gas protection system will be shut down again.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention provides a dust removal system. This invention adopts a brand-new concept of low-speed, high-speed, wave-shaped conveying pipeline system design, which can effectively divert dust during the conveying process, reduce the dust content of the conveying system, and maintain the efficient operation of the system.

[0024] 2. This invention provides a dust removal system. The dust cleaning system designed in this invention can remove calcium carbide powder to the maximum extent, preventing dust accumulation.

[0025] Ensure the safe and stable operation of the dust removal system.

[0026] 3. This invention provides a dust removal system. This invention designs an exhaust system that can safely and reliably discharge residual acetylene gas before the system is started, thereby reducing the safety risks of the system.

[0027] 4. This invention provides a dust removal system. This invention employs a flame arrestor system, which can effectively isolate potential fires during operation and reduce the fire risk of the system.

[0028] 5. The invention provides a dust removal system. The invention designs a detachable pipeline, which can be used during construction, thereby improving maintenance efficiency and reducing maintenance costs.

[0029] 6. This invention provides a dust removal system. The control system of this invention adopts a DCS system or a PLC system, which is highly mobile. The control system of this invention can be designed with one-button start-up and one-button stop-up systems, and all systems can be interlocked to achieve safe and reliable operation of the system. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the device structure according to Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the device structure in Embodiment 2 of the present invention;

[0032] Figure 3 This is a schematic diagram of the third conveying pipeline structure of the present invention.

[0033] Figure 4 This is a top view of the third conveying pipeline of the present invention;

[0034] Figure 5 This is an enlarged schematic diagram of the jet pipe structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the vacuum branch pipe type structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the electrical principle of the present invention.

[0037] In the diagram: 1. Dust collection branch system; 11. Dust collection branch pipe; 2. Conveying pipeline system; 21. First conveying pipeline; 22. Second conveying pipeline; 23. Dust collection port; 24. Detection switch; 25. Vent port; 26. Valve; 27. Third conveying pipeline; 28. Flame arrester; 3. Gas protection system; 4. Dust cleaning system; 41. Dust cleaning pipeline; 42. Valve control assembly; 43. Dust blowing pipeline; 44. Blowing hole; 5. Dust collection system; 6. Control system; 7. Exhaust system; 8. Fire protection system. Detailed Implementation

[0038] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "first," "second," and "middle end" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements in this disclosure and do not specifically refer to any component or element in this disclosure, nor should they be construed as limiting this disclosure.

[0039] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0040] Example 1

[0041] like Figures 1 to 7As shown, a dust removal system includes a dust collection branch system 1, a conveying pipeline system 2, a gas protection system 3, a dust cleaning system 4, a dust collection system 5, a control system 6, an exhaust system 7, and a fire prevention system 8. The output end of the dust collection branch system 1 is connected to the conveying pipeline system 2 for collecting calcium carbide dust from a crusher. The conveying pipeline system 2 is used to convey gas containing calcium carbide dust. The gas protection system 3 is used to replace acetylene gas in the calcium carbide dust gas in the conveying pipeline system 2 with inert gas. The dust cleaning system 4 is used to clean the calcium carbide dust in the conveying pipeline system 2. The dust collection system 5 is located at the end of the conveying pipeline system 2. The exhaust system 7 is used to discharge acetylene gas from the conveying pipeline system 2. The fire prevention system 8 is used to prevent open flames from entering the dust collection system 5. The control terminals of the dust collection branch system 1, the conveying pipeline system 2, the gas protection system 3, the dust cleaning system 4, the dust collection system 5, the exhaust system 7, and the fire prevention system 8 are electrically connected to the control system 6.

[0042] like Figure 3 and Figure 4As shown, the conveying pipeline system 2 includes a first conveying pipeline 21, a second conveying pipeline 22, and a third conveying pipeline 27. The first conveying pipeline 21, the second conveying pipeline 22, and the third conveying pipeline 27 are multiple sets. The first conveying pipeline 21 is a downhill pipeline with a slope ≤30°. The second conveying pipeline 22 is an uphill pipeline with a slope ≥45°. The third conveying pipeline 27 is a double-bend structure with its ends connected. The high end of the first conveying pipeline 21 and the high end of the second conveying pipeline 22 are connected via the third conveying pipeline 27, and the low end of the first conveying pipeline 21 and the low end of the second conveying pipeline 22 are connected via a bend transition. In the prior art, the slope of pipelines generally does not exceed 15°. Due to the long pipeline transport distance, a minimum 30° inclination angle for long-distance transport would result in a high starting point for the conveying system. Therefore, this embodiment of the invention uses a wave-like pipeline for transport, with an inclination angle of at least 45° for uphill sections and at least 30° for downhill sections. This effectively reduces dust accumulation in the conveying pipeline system. In this embodiment of the invention, when calcium carbide dust encounters an uphill slope during transport, it is inclined at an angle of not less than 45°. The air containing calcium carbide dust will impact the uphill pipe, and some dust will slide down to the dust collection port 23 at the lower point. The dust collection port 23 is connected to the dust collection system, and the calcium carbide dust is collected and transferred to the treatment station. This invention adopts a novel low-step, high-climb concept, which can effectively divert dust during transport, reduce the dust content of the transport pipeline system, and maintain the efficient operation of the system. In this embodiment of the invention, the high point connection between the first transport pipeline 21 and the second transport pipeline 22 is connected by a third transport pipeline 27. The third transport pipeline 27 is a structure of two bends connected end to end. Through the connection and conversion of the third transport pipeline 27, the first transport pipeline 21 and the second transport pipeline 22 can be in different vertical planes, which can facilitate the adjustment of the angle between the first transport pipeline 21 and the second transport pipeline 22.The inclination angle of the first conveying pipe is no greater than 30°, and the inclination angle of the second conveying pipe 22 is no less than 45°. Based on the required pipe height and pipe wind resistance calculation, the optimal inclination angle of the first conveying pipe 21 is 30°, and the optimal inclination angle of the second conveying pipe 22 is 60°. If a 90° bend is directly used between the first conveying pipe 21 and the second conveying pipe 22, it is impossible to control the inclination angle of the first conveying pipe 21 and the second conveying pipe 22. Therefore, this invention adopts a third conveying pipe 27 with a double bend between the first conveying pipe 21 and the second conveying pipe 22. The first conveying pipe 21 and the second conveying pipe 22 are not in the same vertical section, forming a three-dimensional bend design at the connection. This makes it easier to control the angle between the first conveying pipe 21 and the second conveying pipe 22, and is not limited to a 90° bend. Under the premise of ensuring the minimum wind resistance design requirements, the inclination angle between the first conveying pipe 21 and the second conveying pipe 22 can be freely designed, which can adapt to application scenarios with multiple ramp lengths.

[0043] A dust collection port 23 is provided at the low point where the first conveying pipe 21 and the second conveying pipe 22 connect. The dust collection port 23 is connected to the dust collection system 5. A detection switch 24 is provided at the dust collection port 23. The detection switch 24 is used to control the opening and closing of the dust collection port 23. The detection switch 24 is electrically connected to the control system 6 or wirelessly connected. In this embodiment of the invention, after the detection switch 24 detects that dust has accumulated to a certain level or storage capacity at the low-point dust collection port 23, it opens the external conveying system to convey the material to the dust collection system 5. After no storage capacity is detected, the conveying system is shut down after a certain period of time.

[0044] like Figure 1 As shown, a vent 25 is provided at the high point where the first conveying pipe 21 and the second conveying pipe 22 connect. The vent 25 is connected to the venting system 7. A valve 26 and a flame arrester 28 are provided at the vent 25. The valve 26 is used to control the opening and closing of the vent 25. The valve 26 is electrically connected to the control system 6 or wirelessly connected.

[0045] The dust cleaning system 4 includes dust cleaning pipes 41 and valve control components 42. Multiple sets of dust cleaning pipes 41 are provided and are vertically inserted into the pipeline of the conveying pipeline system 2. These multiple sets of dust cleaning pipes 41 are evenly distributed in various sections of the conveying pipeline system 2. In this embodiment of the invention, the cleaning pipes of the dust cleaning system 4 are arranged perpendicularly to the pipeline of the conveying pipeline system 2. Multiple sets of dust cleaning pipes 41 are vertically inserted into the conveying pipeline system 2 and distributed in various sections of the conveying pipeline system 2 to clean dust from each section. The dust cleaning system 4 uses inert gas for cleaning, ensuring the safe and reliable operation of the dust removal system. The inert gas dust cleaning system 4 provided in this embodiment of the invention operates in stages, starting from the furthest point from the end dust collector and moving closer. One or a group of valves are opened at a time. Dust is blown off the bottom of the pipe and carried by the system's directional airflow to the system's lowest point and the end dust collector. This system effectively blows away dust adhering to the pipe wall, and the airflow through the pipeline system carries the dust to the system's lowest point and the dust collector. After the system stops, a large amount of calcium carbide dust accumulates in the pipeline, requiring periodic cleaning. This invention's system ensures maximum removal of calcium carbide dust each time the system stops, preventing dust accumulation and reducing the risk of calcium carbide dust buildup.

[0046] The dust collection branch system 1 includes several dust collection branch pipes 11. One end of each of the several dust collection branch pipes 11 is sequentially connected to the conveying pipeline system 2. The other end of each dust collection branch pipe 11 is connected to a fan hood. The interface between the dust collection branch pipe 11 and the fan hood is a single interface, a double interface, or a triple interface. The connection angle between the dust collection branch pipe 11 and the conveying pipeline system 2 is ≤30°. The connection between the conveying pipeline system 2 and the dust collection branch pipe 11 is a variable diameter structure, where the diameter of the conveying pipeline system 2 after connecting to the dust collection branch pipe 11 is larger than the diameter before connecting. In this embodiment of the invention, the conveying pipeline system 2 adopts a variable diameter structure, which not only meets the air volume design requirements but also reduces construction costs, making it highly practical. In this embodiment of the invention, the variable diameter structure of the conveying pipeline system 2 adopts a tapered transition structure, which minimizes the accumulation of calcium carbide dust. The dust collection branch pipe 11 connects to the conveying pipeline system 2 at the variable diameter structure, and the angle between the dust collection branch system 1 and the conveying pipeline system 2 is ≤30°.

[0047] The control system 6 adopts a DCS control system or a PLC controller system.

[0048] Example 2

[0049] like Figures 2-7As shown, a dust removal system includes a dust collection branch system 1, a conveying pipeline system 2, a gas protection system 3, a dust cleaning system 4, a dust collection system 5, a control system 6, an exhaust system 7, and a fire prevention system 8. The output end of the dust collection branch system 1 is connected to the conveying pipeline system 2 and is used to collect calcium carbide dust from a crusher. The conveying pipeline system 2 is used to convey gas containing calcium carbide dust. The gas protection system 3 is used to replace the calcium carbide dust-containing gas in the conveying pipeline system 2 with atmospheric pressure. The dust cleaning system 4 is used to clean the calcium carbide dust in the conveying pipeline system 2. The dust collection system 5 is located at the end of the conveying pipeline system 2. The exhaust system 7 is used to discharge acetylene gas from the conveying pipeline system 2. The control terminals of the dust collection branch system 1, the conveying pipeline system 2, the gas protection system 3, the dust cleaning system 4, the dust collection system 5, the exhaust system 7, and the fire prevention system 8 are electrically connected to the control system 6.

[0050] like Figure 3 and Figure 4As shown, the conveying pipeline system 2 includes a first conveying pipeline 21, a second conveying pipeline 22, and a third conveying pipeline 27. The first, second, and third conveying pipelines are in multiple sets. The first conveying pipeline 21 is a downhill pipeline with a slope ≤30°. The second conveying pipeline 22 is an uphill pipeline with a slope ≥45°. The third conveying pipeline 27 is a double-bend structure with its ends connected. The high end of the first and second conveying pipelines 21 and 22 are connected via the third conveying pipeline 27, and the low end of the first and second conveying pipelines 21 and 22 are connected via a bend. In existing technologies, the slope of pipelines generally does not exceed 15°. Due to the long pipeline length, a long-distance conveying angle of at least 30° would result in a high starting point for the conveying system. Therefore, this embodiment of the invention uses a wave-like pipeline for conveying, with an uphill angle of at least 45° and a downhill angle of at least 30°. This effectively reduces dust accumulation on the conveying pipeline system 2. In this embodiment of the invention, when calcium carbide dust encounters an uphill slope during transport, it is inclined at an angle of not less than 45°. The air containing calcium carbide dust will impact the uphill pipe, and some dust will slide down to the dust collection port 23 at the lower point. The dust collection port 23 is connected to the dust collection system, and the calcium carbide dust is collected and transferred to the treatment station. This invention adopts a novel concept of low-speed, high-climbing transport, which can effectively divert dust during transport, reduce the dust content of the transport system, and maintain the system's efficient operation. In this embodiment of the invention, the high point connection between the first transport pipe 21 and the second transport pipe 22 is connected by a third transport pipe 27. The third transport pipe 27 is a structure of two bent pipes connected end to end. Through the connection and conversion of the third transport pipe 27, the first transport pipe 21 and the second transport pipe 22 can be in different vertical planes, which can facilitate the adjustment of the angle between the first transport pipe 21 and the second transport pipe 22. The inclination angle of the first conveying pipe is no greater than 30°, and the inclination angle of the second conveying pipe 22 is no less than 45°. Based on the required pipe height and calculated pipe wind resistance, the optimal inclination angle for the first conveying pipe 21 is 30°, and for the second conveying pipe 22, it is 60°. Using a 90° bend directly between the first and second conveying pipes 21 and 22 makes it difficult to control their inclination angles. Therefore, this invention employs a third conveying pipe 27 with double bends between the first and second conveying pipes 21 and 22, which makes it easier to control the angle between them. This invention adopts a novel low-travel, high-climb concept, which effectively diverts dust during the conveying process, reducing the dust content of the conveying system and maintaining efficient system operation.

[0051] A dust collection port 23 is provided at the low point of the connection between the first conveying pipe 21 and the second conveying pipe 22. The dust collection port 23 is connected to the dust collection system 5. A detection switch 24 is provided at the dust collection port 23. The detection switch 24 is used to control the opening and closing of the dust collection port 23. The detection switch 24 is electrically connected to the control system 6 or wirelessly connected.

[0052] A vent 25 is provided at the high point where the first conveying pipe 21 and the second conveying pipe 22 connect. The vent 25 is connected to the venting system 7. A valve 26 and a flame arrester 28 are provided at the vent 25. The valve 26 is used to control the opening and closing of the vent 25. The valve 26 is electrically connected to the control system 6 or wirelessly connected.

[0053] The dust cleaning system 4 includes a dust blowing pipe 43, which is disposed inside the conveying pipeline system 2. The dust blowing pipe 43 has several blowing holes 44. In this embodiment of the invention, the dust cleaning system 4 can effectively blow away dust adhering to the pipe wall, and the airflow within the conveying pipeline system 2 carries the calcium carbide dust to the lowest point or end dust collector of the dust removal system. This embodiment of the invention effectively solves the problem of calcium carbide dust accumulation in the dust removal pipeline system after system shutdown, effectively reducing the safety operation risks of the dust removal system.

[0054] The dust cleaning system 4 is an inert gas cleaning system.

[0055] like Figure 6As shown, the dust collection branch system 1 includes several dust collection branch pipes 11. One end of each of the several dust collection branch pipes 11 is sequentially connected to the conveying pipeline system 2. The other end of each dust collection branch pipe 11 is connected to a belt sealing cover. The interface between the dust collection branch pipe 11 and the fan cover is a single interface, a double interface, or a triple interface. The connection angle between the dust collection branch pipe 11 and the conveying pipeline system 2 is ≤30°. The connection between the conveying pipeline system 2 and the dust collection branch pipe 11 is a variable diameter structure, where the diameter of the conveying pipeline system 2 after connecting to the dust collection branch pipe 11 is larger than the diameter before connection. In this embodiment of the invention, the conveying pipeline system 2 adopts a variable diameter structure, which not only meets the air volume design requirements but also reduces construction costs, making it highly practical. In this embodiment of the invention, the variable diameter structure of the conveying pipeline system 2 adopts a tapered transition structure, which minimizes the accumulation of calcium carbide dust. The dust collection branch pipe 11 connects to the conveying pipeline system 2 at the variable diameter structure, and the angle between the dust collection branch system 1 and the conveying pipeline system 2 is ≤30°. In the implementation of this invention, the dust collection branch pipe 11 can be connected to the sealing cover of the conveyor belt, or to the air intake of enclosed equipment such as a silo or bucket elevator. A fire damper is installed at the air intake of the sealing cover or similar equipment to prevent flames from entering the dust removal system of this invention. The connection between the system of this invention and the air intake of the sealing equipment such as the belt sealing cover, silo, or bucket elevator can be a flexible connection or a rigid connection. Valves are added at the connection points between the multiple dust collection branch pipes 11 and the conveying pipeline system. These valves can be regulating valves, with each dust collection branch pipe 11 pressure-linked to the main pipe of the conveying pipeline system 2, or they can be ordinary manual valves. In this embodiment of the invention, a vent 25 is provided at the highest point where the dust collection branch pipe 11 connects to the conveying pipeline system 2.

[0056] The control system 6 adopts a DCS control system or a PLC controller system.

[0057] In a preferred embodiment of the present invention, the dust extraction branch system and the conveying pipeline system can be connected by welding or by flanges to adapt to different pipeline connection requirements.

[0058] Preferably, the dust collection system includes a silo and a dust collector, and both the silo and the dust collector are equipped with fire dampers to effectively isolate fire sources and enhance safety.

[0059] Preferably, in addition to adopting explosion-proof facilities, the dust collector also uses inert gas jetting to further reduce safety risks.

[0060] Preferably, the conveying pipeline system further includes a fixed support for fixing the first conveying pipeline, the second conveying pipeline, and the third conveying pipeline.

[0061] A dust removal process for a dust removal system, the dust removal process comprising the following steps:

[0062] Step a: Before starting the system, control system 6 controls the start of venting system 7 to release acetylene from pipeline system 2 to the atmosphere or acetylene recovery pipeline. After venting system 7 has been working for a period of time and there is no acetylene gas in pipeline system 2, venting system 7 is shut down.

[0063] Step b, then the gas protection system 3 is started by the control system 6. The gas protection system 3 is used to replace the acetylene gas in the gas containing calcium carbide dust in the conveying pipeline system 2 with inert gas. After a period of time, the dust cleaning system 4 is turned on by the control system 6 to replace the air in the system with inert gas. After the air replacement is qualified, the dust cleaning system 4 is turned off.

[0064] Step c: During system operation, when the detection switch 24 detects a high material level at the dust collection port 23, it automatically controls the valve to open for unloading. The collected dust is then transported through the dust collection system 5. When the dust collection port 23 is at a low material level, the unloading valve is automatically closed, and the unloading and conveying system is delayed to ensure that there is no dust in the conveying pipeline system 2.

[0065] Step d: Before the system stops, the gas protection system 3 is turned on. The gas protection system 3 transports the dust along the conveying pipeline system 2 to the lowest point or end of the conveying pipeline. The dust collection system 5 will be turned on automatically according to step c. The dust cleaning system 4 is automatically controlled to clean the dust in the conveying pipeline system 2 in stages. After the dust is collected and transferred by the dust collection system 5, the dust is cleaned until there is no calcium carbide dust in the conveying pipeline system. Then the dust cleaning system 4 and the gas protection system 3 are turned off in sequence.

[0066] Of course, the above embodiments are not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A dust removal system, characterized in that: The dust removal system includes a dust collection branch system (1), a conveying pipeline system (2), a gas protection system (3), a dust cleaning system (4), a dust collection system (5), a control system (6), an exhaust system (7), and a fire prevention system (8). The output end of the dust collection branch system (1) is connected to the conveying pipeline system (2) for collecting calcium carbide dust. The conveying pipeline system (2) is used to convey gas containing calcium carbide dust. The gas protection system (3) is used to replace acetylene gas in the gas containing calcium carbide dust in the conveying pipeline system (2) with inert gas. The dust cleaning system (4) is used to clean the conveying pipeline system (2). The calcium carbide dust in the pipeline system (2); the dust collection system (5) is located at the end of the conveying pipeline system (2); the venting system (7) is used to vent the acetylene gas in the conveying pipeline system (2); the fire prevention system (8) is located at the tail end of the conveying pipeline system (2); the fire prevention system (8) is used to prevent open flames from entering the dust collection system (5); the control terminals of the dust suction branch system (1), the conveying pipeline system (2), the gas protection system (3), the dust cleaning system (4), the dust collection system (5), the venting system (7), and the fire prevention system (8) are electrically connected to the control system (6) respectively; The vacuuming branch system (1) includes several vacuuming branch pipes (11). One end of the vacuuming branch pipe (11) is connected to the conveying pipe system (2), and the other end of the vacuuming branch pipe (11) is connected to the fan hood. The connection angle between the vacuuming branch pipe (11) and the conveying pipe system (2) is ≤30 degrees. The conveying pipe system (2) has a variable diameter structure. The diameter of the conveying pipe system (2) after the vacuuming branch pipe (11) is larger than the diameter before the vacuuming branch pipe (11). The conveying pipeline system (2) includes a first conveying pipeline (21), a second conveying pipeline (22), and a third conveying pipeline (27). The first conveying pipeline (21), the second conveying pipeline (22), and the third conveying pipeline (27) are in multiple groups. The first conveying pipeline (21) is a downhill pipeline with a slope of ≤30 degrees. The second conveying pipeline (22) is an uphill pipeline with a slope of ≥45 degrees. The third conveying pipeline (27) is a double-bend structure with the ends connected. The high end of the first conveying pipeline (21) and the high end of the second conveying pipeline (22) are connected by the third conveying pipeline (27). The low end of the first conveying pipeline (21) and the low end of the second conveying pipeline (22) are connected by a bend. A dust collection port (23) is provided at the low point connection of the first conveying pipe (21) and the second conveying pipe (22). The dust collection port (23) is connected to the dust collection system (5). A detection switch (24) is provided at the dust collection port (23). The detection switch (24) is used to control the opening and closing of the dust collection port (23). The detection switch (24) is electrically connected to the control system (6). A vent (25) is provided at the high point connection between the first conveying pipe (21) and the second conveying pipe (22). A flame arrester (28) is provided outside the vent (25). The flame arrester (28) is used to prevent backfire from the vent (25). A valve (26) is provided at the vent (25). The valve (26) is used to control the opening and closing of the vent (25). The valve (26) is electrically connected to the control system (6). The dust cleaning system (4) includes a dust cleaning pipe (41) and a valve control assembly (42). The dust cleaning pipe (41) is provided in multiple sets. The dust cleaning pipe (41) is vertically inserted into the pipe of the conveying pipe system (2). The multiple sets of dust cleaning pipes (41) are evenly distributed in each section of the pipe of the conveying pipe system (2). The dust cleaning system (4) includes a dust blowing pipe (43). The dust blowing pipe (43) is provided inside the pipe of the conveying pipe system (2). The dust blowing pipe (43) is provided with a number of blowing holes (44).

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