Small-angle pipeline dust collection system
By using square tubes as dust collection pipes in the powder bulk device and setting up a filter cloth and an inflation system inside it, the problem of dust accumulation and blockage under small angle arrangements is solved, and efficient dust collection and energy consumption savings are achieved.
Patent Information
- Application Number
- CN202421901170.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In powder bulk devices, due to space limitations, the newly installed dust collection pipeline can only be arranged at an angle less than 45°, resulting in dust easily accumulate and blocking the pipeline. Raising wind speed to solve the problem of dust accumulation will greatly increase energy consumption and cannot meet the standards of economics and production energy saving.
A square tube is used instead of a conventional circular tube as a dust collection pipe, and a filter cloth is installed inside the oblique square tube to divide its internal space into two cavityes, and a sinking dust particles are suspended by the inflatable system to prevent them from accumulating in the pipe.
It effectively avoids the accumulation and blockage of dust in the dust collection pipeline, reduces energy consumption, improves the dust collection effect and the operating stability of the system, and meets the requirements of economy and production energy saving.
Smart Images
Figure CN222871725U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of material dust collection, and specifically relates to a small-angle pipeline dust collection system. Background Art
[0002] In the production process of cement clinker, sand and gravel aggregates, and ultrafine powder in the building materials industry, dust will be generated when the materials are shipped from the storage bin in bulk and loaded onto trucks. At this time, it is necessary to effectively collect dust at the dust point to reduce dust and meet the requirements of environmental emission. Conventional dust collection systems generally arrange dust collection equipment near the dust point or other suitable locations, so that the dust collection pipeline (dust-containing gas transmission pipeline) enters the dust collection equipment from the dust point at an angle of not less than 45° (that is, the angle between the dust collection pipeline and the horizontal plane is ≥45°), dust will not accumulate in the dust collection pipeline, and dust removal work is smooth.
[0003] However, when the existing powder bulk device is technically modified to add dust collection equipment, the newly added dust collection duct can only be arranged at an angle less than 45° due to the layout restrictions of the existing production equipment on site, the small space at the bottom of the warehouse or other conditions. Due to the small angle, dust is easily accumulated in the dust collection duct and the duct is blocked. Increasing the dust collection wind speed can solve the dust accumulation problem in the duct, but this will greatly increase energy consumption. The smaller the angle of the dust collection duct, the greater the dust collection wind speed required and the higher the energy consumption, which cannot meet the standard requirements of economy and production energy saving.
[0004] In order to solve the above problems, the utility model provides a small-angle duct dust collection system, which can meet the production requirements of dust removal equipment where the dust collection duct can only be installed at less than 45°, saving production energy consumption. The utility model uses square tubes instead of conventional round tubes as dust collection ducts, which can be flexibly controlled during production; the process is simple, the operation is stable and reliable, which not only solves the dust collection problem of the powder bulk system, but also meets the use requirements of the dust collection duct, and at the same time makes the workshop process layout more reasonable. Summary of the invention
[0005] In view of the above problems, the utility model provides a small-angle pipeline dust collection system, which can meet the dust collection requirements of bulk powder systems, effectively improve the dust collection effect, and simplify the process flow; the system has simple process, stable and reliable operation, and convenient maintenance. The specific technical solution is as follows.
[0006] The small-angle duct dust collection system comprises a bulk machine, a dust collection duct one, an inclined square pipe, an air charging system, a dust collection duct two, a dust collector and a negative pressure device.
[0007] The inclined square tube uses a square tube (instead of a conventional round tube) with a square cross section. It is a conveying pipe for dusty gas. When the inclined square tube is placed on a horizontal ground, the tube wall in contact with the horizontal ground is the bottom surface, the tube wall parallel to the bottom surface is the top surface, and the tube wall perpendicular to the horizontal ground is the side surface. The raised end of the inclined square tube is the high end, and the other end is the low end. The two ports of the high end and the low end are blocked with a plugging plate, and the blocking surface is the end surface. When one end of the inclined square tube is raised, the angle between its bottom surface and the horizontal plane is the horizontal angle of the inclined square tube, and the horizontal angle of the inclined square tube is 5°~45°.
[0008] The inside of the oblique square tube is provided with a filter cloth parallel to its bottom surface. The edges of the filter cloth are respectively fixed on the inner walls of the two end surfaces and two side surfaces of the oblique square tube, and the cloth surface is tensioned. The filter cloth is arranged close to the bottom surface of the oblique square tube, dividing the internal space of the oblique square tube into two cavities, an upper cavity and a lower cavity. The cross-sectional area of the upper cavity is large, and it is the channel for the dust-containing gas to flow to the dust collector. The cross-sectional area of the lower cavity is small. The filter cloth can prevent dust from entering the lower cavity from the upper cavity.
[0009] The top of the bulk loader is connected to the lower port of the dust collecting pipe 1, and the upper port of the dust collecting pipe 1 is connected to the side or end surface of the lower end of the oblique square pipe. The top surface of the upper end of the oblique square pipe is connected to the lower port of the dust collecting pipe 2. The dust collecting pipe 2 is then connected to the dust collector and the negative pressure device in sequence. The dust collecting pipes 1 and 2 have a sufficiently large inclination angle, and no dust particles will accumulate in the pipes.
[0010] The inflation system includes an inflation fan and an inflation pipe. One end of the inflation pipe is connected to the inflation fan, and the other end is provided with a number of inflation branches according to the length of the oblique square pipe. Each inflation branch is connected to the bottom surface of the oblique square pipe and the lower cavity of the oblique square pipe. The specific number of inflation branches is limited to the amount of settled dust particles suspended on the filter cloth. Valves can be set on each inflation branch for easy maintenance.
[0011] The lower edge of the connection port between the dust collecting pipe 1 and the oblique square pipe is slightly higher than the filter cloth, ensuring that the settled dust particles can smoothly flow into the dust collecting pipe 1 and enter the bulk loader.
[0012] The joints between the above parts are tight and airtight.
[0013] Beneficial effects of the utility model: in the process of technical transformation of adding dust collection facilities to the existing powder bulk device, due to the restrictions of the layout of the existing production equipment on site, the narrow space at the bottom of the warehouse or other conditions, the newly added conveying pipeline can only be arranged at a horizontal angle of less than 45°. The utility model uses square tubes instead of round tubes as the conveying pipeline for dust-containing gas, and sets filter cloth near the bottom surface of the inner part of the oblique square tube to divide the inner space of the oblique square tube into an upper cavity and a lower cavity. The upper cavity serves as the conveying channel for the dust-containing airflow, and at the same time, the air flow is introduced into the lower cavity to make the large dust particles settled in the oblique square tube suspended above the filter cloth. Most of the suspended dust will be entrained by the subsequent dust-containing airflow into the dust collector for purification, and a small part of the heavier suspended dust will flow back into the bulk machine along the filter cloth under the action of the gravity component force, which can effectively prevent the settled dust particles from accumulating in the oblique square tube and clogging the pipeline. The above technical solution utilizes a small-angle inclined square tube to effectively collect dust from dust-generating points. The length and angle of the inclined square tube can be flexibly arranged and adjusted according to the specific conditions on site, and can adapt to different space requirements and equipment layouts. Large particles of dust settled in the inclined square tube will be cleaned and discharged in time to avoid pipeline blockage, reduce the dust collection load of the dust collector, and improve the operating stability and dust collection effect of the system.
[0014] The utility model discloses the dust collector has the advantages of simple structure, space saving, flexible design and installation, low transformation cost, energy saving and environmental protection, stable and reliable operation and low failure rate, and can not only maintain the stability of dust collection efficiency at dust generating points, but also ensure the integrity of the system and the convenience of maintenance, solves the problem of large dust particles clogging in small-angle inclined square pipes, realizes the recycling of large dust particles, and reduces the amount of dust generated. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the dust collection system. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 It is a structural schematic diagram of the utility model in the front view.
[0017] Figure 2 It is a structural schematic diagram of the utility model from the right side.
[0018] Figure 3 It is a schematic diagram of force analysis of suspended dust particles in the utility model.
[0019] Figure 4 It is a partial enlarged view of the utility model.
[0020] In the figure: 1 bulk loader, 2 dust collecting duct 1, 3 oblique square pipe, 31 filter cloth, 4 inflation system, 41 inflation fan, 42 inflation duct, 5 dust collecting duct 2, 6 dust collector, 7 negative pressure device. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation method of the dust collection system will be further described in detail below with reference to the accompanying drawings.
[0022] The small-angle duct dust collection system comprises a bulk loader 1, a dust collection duct 1 2, an oblique square pipe 3, an air charging system 4, a dust collection duct 2 5, a dust collector 6 and a negative pressure device 7.
[0023] The oblique square tube 3 uses a square tube (instead of a conventional round tube) with a square cross section, and is a conveying pipe for dusty gas. When the oblique square tube 3 is placed on a horizontal ground, the tube wall in contact with the horizontal ground is the bottom surface, the tube wall parallel to the bottom surface is the top surface, and the tube wall perpendicular to the horizontal ground is the side surface. The raised end of the oblique square tube 3 is the high end, and the other end is the low end. The two ports of the high end and the low end are blocked with a plugging plate, and the blocking surface is the end surface. When one end of the oblique square tube 3 is raised, the angle between its bottom surface and the horizontal plane is the horizontal angle of the oblique square tube 3, and the horizontal angle of the oblique square tube 3 is 5° to 45°.
[0024] The inside of the oblique square tube 3 is provided with a filter cloth 31 parallel to the bottom surface thereof, and the edges of the filter cloth 31 are respectively fixed to the inner walls of the two end surfaces and two side surfaces of the oblique square tube 3, and the cloth surface is tensioned. The filter cloth 31 is arranged close to the bottom surface of the oblique square tube 3, dividing the internal space of the oblique square tube 3 into an upper cavity and a lower cavity. The cross-sectional area of the upper cavity is large, and it is the passage for the dust-containing gas to flow to the dust collector 6, and the cross-sectional area of the lower cavity is small. The filter cloth 31 can prevent dust from entering the lower cavity from the upper cavity.
[0025] like Figure 1 , 2 As shown, the top of the bulk loader 1 is connected to the lower end of the dust collecting pipe 1 2, and the upper end of the dust collecting pipe 1 2 is connected to the side or end surface of the lower end of the oblique square pipe 3. The top surface of the upper end of the oblique square pipe 3 is connected to the lower end of the dust collecting pipe 2 5. The dust collecting pipe 2 5 is then connected to the dust collector 6 and the negative pressure device 7 in sequence. The dust collecting pipe 1 2 and the dust collecting pipe 2 5 have a sufficiently large inclination angle, and no dust particles will accumulate in the pipes.
[0026] The inflation system 4 includes an inflation fan 41 and an inflation pipe 42. One end of the inflation pipe 42 is connected to the inflation fan 41, and the other end is provided with a plurality of inflation branches according to the length of the oblique square tube 3, each inflation branch is connected to the bottom surface of the oblique square tube 3, and is connected to the lower cavity of the oblique square tube 3. The specific number of inflation branches is limited to enable the settled dust particles to be suspended on the filter cloth 31, and valves can be provided on each inflation branch for easy maintenance.
[0027] The lower edge of the connection port between the dust collecting pipe 2 and the oblique square pipe 3 is slightly higher than the filter cloth 31, ensuring that the settled dust particles can smoothly flow into the dust collecting pipe 2 and enter the bulk loader 1.
[0028] The joints between the above parts are tight and airtight.
[0029] When the system is in production and operation, the negative pressure device 7 generates negative pressure, and the dust-containing gas in the bulker 1 enters the upper cavity of the oblique square tube 3 through the dust collecting pipe 1 2 at the top of the bulker 1 under the suction effect of the negative pressure, and enters the dust collector 6 through the oblique square tube 3 and the dust collecting pipe 2 5 in turn for dust removal and purification.
[0030] When the dust-laden gas passes through the oblique square tube 3, most of the fine dust particles follow the airflow into the dust collector 6 for dust collection and purification, while a small amount of large dust particles settle in the upper cavity of the oblique square tube 3. The inflation system 4 adjusts the flow and pressure of the inflation fan 41 as the dust removal system (dust collector 6 and negative pressure device 7) operates. The air flow generated by the inflation fan 41 flows into the lower cavity of the oblique square tube 3 through the inflation pipe 42. The air flow vertically passes through the filter cloth 31 and blows toward the settled dust particles, so that the settled dust particles are suspended above the filter cloth 31.
[0031] Figure 3 A schematic diagram of the force analysis of suspended dust particles is given. The dust particles suspended above the filter cloth 31 are subject to a vertical downward gravity G, and the gravity G can be decomposed into a component force G1 that is vertical and points to the direction of the filter cloth 31, and a component force G2 that is parallel to the filter cloth 31 and in a downward direction. The force exerted by the air flow generated by the inflation fan 41 on the suspended dust particles is f, and the magnitude of f is the same as G1, and the direction of f is opposite to G1. The force exerted by the dust-laden airflow on the suspended particles is fa, and the direction of fa is opposite to G2. Most of the suspended dust particles are subject to a fa greater than G2, and will be entrained by the subsequent dust-laden airflow into the dust collector 6 for dust removal and purification; a small number of heavier suspended dust particles are subject to a fa less than G2, and will flow back into the bulk loader 1 along the filter cloth 31. Figure 4 The direction of the arrow in the figure is the backflow direction of the suspended dust particles.
[0032] The above technical solution solves the problem of accumulation and blockage of large dust particles in small-angle conveying pipes, reduces the amount of dust generated, and realizes the recycling of large dust particles; the returned dust particles can also be sold as a separate product variety, increasing the company's economic income.
[0033] When the equipment is shut down for maintenance, the dust particles remaining in the oblique square tube 3 can be cleaned by opening and adjusting the air volume of the negative pressure device 7 and the inflation system 4.
[0034] The size of the dust collector 6 and the negative pressure device 7 is selected and configured according to the specific conditions of the dust generating point, and the size of the air filling system 4 is selected according to the size of the oblique square pipe 3. Take the dust removal technology transformation of a bulk cement tanking device in a cement plant as an example: Figure 1 , 2 As shown, the dust collecting pipe 2 on the top of the bulk loader 1 is welded to the side of the lower end of the oblique square pipe 3; the air filling pipe 42 is divided into three air filling branches, which are respectively welded to the upper section, middle section and lower section of the bottom surface of the oblique square pipe 3; the specification model of the oblique square pipe 3 is XZ400×8000 (that is, the cross-sectional size of the square pipe is 400mm×400mm, and the pipe length is 8000mm), the horizontal angle between the oblique square pipe 3 and the horizontal plane is 10°, wherein the distance between the filter cloth 31 and the bottom surface of the oblique square pipe 3 is 83mm (this distance is adjusted with the model of the oblique square pipe), and the dust-containing gas flow rate in the oblique square pipe 3 is about 7500m 3 / h, then by calculation, the air volume of the inflation system 4 is 384m 3 / h, and the wind pressure is about 5100Pa according to the equipment selection manual.
Claims
1. Small angle duct dust collection system, characterized by: It comprises a bulk loader (1), a dust collecting pipe 1 (2), an oblique square pipe (3), an air charging system (4), a dust collecting pipe 2 (5), a dust collector (6) and a negative pressure device (7); The oblique square tube (3) is a square tube; A filter cloth (31) parallel to the bottom surface of the oblique square tube (3) is provided inside the oblique square tube (3); the edges of the filter cloth (31) are respectively fixed to the inner walls of the two end surfaces and two side surfaces of the oblique square tube (3); the cloth surface is tensioned; the filter cloth (31) is arranged close to the bottom surface of the oblique square tube (3) to divide the internal space of the oblique square tube (3) into an upper cavity and a lower cavity; the upper cavity has a large cross-sectional area and is a passage for the dust-containing gas to flow to the dust collector (6); the lower cavity has a small cross-sectional area; the filter cloth (31) can prevent dust from entering the lower cavity from the upper cavity; The top of the bulk loader (1) is connected to the lower port of the dust collecting duct one (2); the upper port of the dust collecting duct one (2) is connected to the side or end surface of the lower end of the oblique square tube (3); the top surface of the upper end of the oblique square tube (3) is connected to the lower port of the dust collecting duct two (5); the dust collecting duct two (5) is then connected in sequence to the dust collector (6) and the negative pressure device (7); The lower edge of the connection between the dust collecting pipe 1 (2) and the oblique square pipe (3) is slightly higher than the filter cloth (31); The inflation system (4) comprises an inflation fan (41) and an inflation pipe (42); one end of the inflation pipe (42) is connected to the inflation fan (41), and the other end is provided with a plurality of inflation branches according to the length of the oblique square tube (3); the inflation branches are in communication with the bottom surface of the oblique square tube (3) and the lower cavity of the oblique square tube (3).
2. The small-angle duct dust collection system according to claim 1, characterized in that: The horizontal angle of the oblique square tube (3) is 5° to 45°.
3. The small-angle duct dust collection system according to claim 1, characterized in that: A valve is arranged on the inflation branch.