Sinter dust removal powder pneumatic conveying filter device

Abstract

The utility model discloses a kind of sintering dust removal powder pneumatic dust conveying filtering devices, belong to pneumatic dust conveying technical field, including filter body, dust removal filter assembly is arranged in filter body middle part, dust removal filter assembly divides filter body into upper chamber and lower chamber, and the plugging detection assembly is set on upper chamber and lower chamber, the sundries carried in the process of pneumatic conveying can be blocked and separated, to ensure that dust removal powder passes smoothly, the plugging condition of dust removal filter assembly can be detected in real time, avoid pipeline serious blockage or appear when overpressure cannot stop, affect the normal operation of entire filtering system, improve the stability of system operation.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic ash conveying technology, specifically a pneumatic ash conveying and filtration device for sintering dust removal powder. Background Technology

[0002] Sintering dust is typically collected during production using electrostatic precipitators and bag filters, and then pressurized by a silo pump before being transported to the sintering raw material silo via pneumatic conveying pipelines. Because the dust collectors also draw in various lightweight impurities while collecting dust, these impurities can easily enter the pneumatic conveying pipelines, causing blockages. Furthermore, the ash discharge valves, pipe connections, and downstream conveying equipment used for dust collection may malfunction or shut down under blockage conditions, affecting production continuity and equipment safety. Currently, these issues still require manual inspection and maintenance, making it difficult to monitor blockages in real time, posing safety hazards and downtime risks.

[0003] Chinese utility model patent CN213504845U discloses a pneumatic ash conveying pipe with a foreign object collection device. The device includes a pneumatic ash conveying pipe consisting of an inner pipe and an outer pipe. The inner pipe is located inside the outer pipe and is fixedly connected to the upper end of the inner wall of the outer pipe. The foreign object collection device is installed on the pneumatic ash conveying pipe, comprising a collection pipe and an intercepting grate. The collection pipe has a three-way tubular structure. The front and rear ends of the horizontal pipe are sealed to the outer pipe of the pneumatic ash conveying pipe via flanges. The upper end of the vertical pipe has a flange cover. An intercepting grate is installed on the inner side of the rear end of the horizontal pipe. The intercepting grate adopts a design with larger mesh openings at the top and smaller mesh openings at the bottom.

[0004] This device has a simple structure and is easy to install. It can effectively collect foreign objects, reduce pipe blockage and wear, and eliminate some potential equipment hazards. However, the above structure relies solely on physical barriers and cannot detect blockages in real time. This means that when the pipe is severely blocked or overpressure occurs, it cannot promptly alarm or shut down, affecting the normal operation of the entire filtration system and posing safety risks and maintenance inconveniences. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic conveying and filtration device for sintering dust removal powder, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A sintering dust removal powder pneumatic conveying and filtration device is provided, including a traction mechanism and a filter body. A dust removal and filtration component is provided in the middle of the filter body. The dust removal and filtration component divides the filter body into an upper chamber and a lower chamber. A blockage detection component is provided on both the upper chamber and the lower chamber.

[0007] Furthermore, the dust removal and filtration assembly includes a guide mounting plate, which is disposed in the middle of the inner wall of the filter body. A filter plate is detachably connected to the guide mounting plate, and the filter plate is detachably connected to the filter cover.

[0008] Furthermore, the filter plate includes a mounting part, which is detachably connected to the guide mounting plate and the filter cover plate. A filter part is provided on one side of the mounting part, and the filter part is provided with a plurality of through holes.

[0009] Furthermore, the diameter R of the through hole is 4-6 mm.

[0010] Furthermore, a cover sealing gasket is provided on one side of the upper part of the filter cover.

[0011] Furthermore, a filter sealing gasket is provided between the filter cover and the mounting portion of the filter cover.

[0012] Furthermore, a feed pipe is connected to the lower inlet of the filter body via a quick connector.

[0013] Furthermore, a discharge pipe is connected to the upper discharge port of the filter body via a quick connector.

[0014] Furthermore, the blockage detection component includes a mounting bracket, a detection pipe is mounted on the mounting bracket, and a pressure transmitter is mounted on the detection pipe.

[0015] Furthermore, the diameter of the filter section is 2-2.5 times the diameter of the feed pipe and the discharge pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The dust removal and filtration assembly divides the chamber into an upper chamber and a lower chamber. The filter plates in the dust removal and filtration assembly block and separate the impurities carried in during the pneumatic conveying process, thereby ensuring the smooth passage of dust powder. Meanwhile, the blockage detection component measures the pressure across the upper and lower chambers of the dust removal filter assembly. If the pressure difference is too large, it sends a blockage signal to the external control system, prompting the operator to replace the dust removal filter assembly and clean out the debris. It can detect the blockage of the dust removal filter assembly in real time, preventing the system from failing to shut down due to severe blockage or overpressure, which would affect the normal operation of the entire filtration system and improve the stability of the system. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1This is a schematic diagram of the overall structure of a pneumatic conveying and filtration device for sintering dust removal powder. Figure 2 for Figure 1 Enlarged schematic diagram of the structure of region A in the middle; Figure 3 A cross-sectional structural diagram of the dust removal and filtration component provided by this utility model; Figure 4 A schematic diagram of the filter plate structure provided by this utility model.

[0019] In the diagram: 1. Filter body; 2. Dust removal and filtration assembly; 21. Guide mounting plate; 22. Filter plate; 221. Mounting part; 222. Filtering part; 223. Through hole; 23. Filter cover plate; 24. Cover plate sealing gasket; 25. Filter sealing gasket; 3. Upper chamber; 4. Lower chamber; 5. Blockage detection assembly; 51. Mounting bracket; 52. Detection pipe; 53. Pressure transmitter; 6. Quick coupling; 7. Feed pipe; 8. Discharge pipe; 100. Control system. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-4 As shown in the present invention, a sintering dust removal powder pneumatic conveying and filtration device includes a filter body 1, a dust removal and filtration component 2 is provided in the middle of the filter body 1, the dust removal and filtration component 2 divides the filter body 1 into an upper chamber 3 and a lower chamber 4, and a blockage detection component 5 is provided on both the upper chamber 3 and the lower chamber 4. This utility model discloses a pneumatic conveying and filtering device for sintering dust. The filter body 1 serves as the main cavity structure, which is divided into an upper chamber 3 and a lower chamber 4 by a dust removal and filtering assembly 2. The filter plates 22 in the dust removal and filtering assembly 2 intercept and separate impurities carried during pneumatic conveying, ensuring smooth passage of the dust powder. To monitor the clogging status of the dust removal and filtering assembly 2 in real time, both the upper chamber 3 and the lower chamber 4 are equipped with clogging detection components 5. When the airflow resistance of the dust removal and filtering assembly 2 increases due to the accumulation of impurities, the dust removal and filtering assembly 2 becomes clogged, creating a pressure difference between the upper chamber 3 and the lower chamber 4. The clogging detection components 5 detect the pressure signals in the upper chamber 3 and the lower chamber 4, convert the pressure signals into electrical signals, and transmit them to the control system 100 in real time. The control system 100 calculates and monitors the pressure difference between the upper chamber 3 and the lower chamber 4, and coordinates with... The system compares preset blockage thresholds and prompts maintenance personnel to perform maintenance. When the pressure difference further increases to near the compressed air pressure at the pipeline inlet, the system automatically issues a stop feeding command to prevent the continuous accumulation of dust from causing pipeline overpressure or equipment damage. It can filter various impurities entrained in the dust during the pneumatic conveying stage of sintering dust removal powder, preventing foreign objects from entering the pneumatic conveying pipeline and causing pipeline blockage. At the same time, the blockage detection component 5 measures the front and rear pressures of the upper chamber 3 and lower chamber 4 on both sides of the dust removal filter component 2. If the pressure difference is too large, it sends a filter blockage signal to the external control system 100, prompting the operator to replace the dust removal filter component 2 and clean the impurities. It can detect the blockage of the dust removal filter component 2 in real time, preventing the system from failing to shut down when the pipeline is severely blocked or overpressure occurs, which would affect the normal operation of the entire filtration system and improve the stability of the system operation.

[0027] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the dust removal and filtration assembly 2 includes a guide mounting plate 21, which is located in the middle of the inner wall of the filter body 1. A filter plate 22 is detachably connected to the guide mounting plate 21, and the filter plate 22 is detachably connected to the filter cover plate 23. The dust removal and filtration assembly 2 includes a guide mounting plate 21, which is fixedly installed in the middle of the inner wall of the filter body 1 to support and position the filter plate 22. The filter plate 22 adopts a ring or rectangular structure, and its edge is detachably connected to the guide mounting plate 21 by bolts, buckles or sealing rings. At the same time, its other end is detachably connected to the filter cover plate 23 to form a stable clamping installation method. During operation, the dust-laden gas transported by the ash conveying pipeline enters the filter body 1. After being diverted and guided by the guide mounting plate 21, it acts evenly on the surface of the filter plate 22. Dust and debris are blocked and deposited by the filter plate 22, and clean gas passes through the filter plate 22 into the downstream pipeline. As dust accumulates on the surface of the filter plate 22, if it causes an increase in airflow resistance, the operator can quickly disassemble the filter plate 22 by opening the filter cover plate 23, loosening the connector, and cleaning or replacing it, thereby maintaining the normal operation of the system.

[0028] In one embodiment, see Figure 1 , Figure 3 and Figure 4 As shown, the filter plate 22 includes a mounting part 221, which is detachably connected to the guide mounting plate 21 and the filter cover plate 23. A filter part 222 is provided on one side of the mounting part 221, and the filter part 222 is provided with a plurality of through holes 223. The filter part 222 is fixed on one side of the mounting part 221, and the filter part 222 is provided with a plurality of through holes 223 evenly. The opening ratio of the through holes 223 is designed to be greater than the cross-sectional area of ​​the inlet and outlet feed pipes 7 and 8 to ensure that the airflow will not be severely blocked due to insufficient filtration area. The aperture of the through holes 223 can be selected according to the particle size range of the dust removal powder, so that the gas can pass smoothly while effectively blocking larger impurities and preventing them from entering the downstream conveying pipe. During operation, the dust-laden airflow enters from the feed end, is diverted by the guide plate 21, and then acts evenly on the surface of the filter section 222. Dust particles are blocked and deposited by the through holes 223, while the relatively clean airflow passes through the filter plate 22 into the lower chamber and is discharged. As the operating time increases, if the resistance of the through holes 223 on the filter section 222 increases due to dust accumulation, the operator can restore the normal filtration effect by opening the filter cover plate 23, disassembling the mounting section 221, and replacing the filter plate 22, thus ensuring the stable operation of pneumatic ash conveying.

[0029] In one embodiment, see Figure 1 , Figure 3 and Figure 4 As shown, the diameter R of the through hole 223 is 4-6 mm. In specific applications, several through holes 223 are evenly distributed on the filter section 222 of the filter plate 22. The diameter R of each through hole 223 is designed to be within the range of 4-6 mm to adapt to the operating conditions of the pneumatic ash conveying system. The distribution of the through holes 223 adopts a regular array layout to ensure uniform gas flow path and avoid localized wear aggravation of the filter plate 22 due to localized airflow concentration.

[0030] In a preferred embodiment, the diameter R of the through hole 223 is set to 5 mm. When the dust-laden airflow passes through the filter section 222, the dust particles are blocked and deposited because their particle size is larger than that of the through hole 223. Meanwhile, smaller gas molecules and micro powders can pass smoothly through the through hole 223 from the lower chamber 4 into the upper chamber 3, ensuring the ash conveying efficiency and maintaining a low differential pressure growth rate during operation, thus reducing the need for frequent inspection and maintenance.

[0031] In one embodiment, see Figure 1 , Figure 3 and Figure 4 As shown, a cover sealing gasket 24 is provided on one side of the upper part of the filter cover plate 23. In a specific embodiment, the filter cover plate 23 is connected to the opening end of the filter body 1 by bolts. A cover sealing gasket 24 is provided between the filter cover plate 23 and the filter body 1. The cover sealing gasket 24 is made of polytetrafluoroethylene material, and its thickness and hardness have been optimized to ensure that a stable and tight seal can be formed when the bolts are tightened. During operation, the dust-laden airflow flows at high speed inside the filter body 1 and is blocked by the filter plate 22. Without the cover sealing gasket 24, the gas is very likely to leak from the joint between the cover plate and the body, causing abnormal pressure difference, dust escape and reduced equipment efficiency. By setting the cover sealing gasket 24, a reliable sealing layer is formed on the joint surface, ensuring that the upper chamber 3 and the lower chamber 4 maintain a stable pressure environment, thereby making the filtration process and the pneumatic ash conveying process safer and more efficient.

[0032] In one embodiment, see Figure 1 , Figure 3 and Figure 4 As shown, a filter sealing gasket 25 is provided between the filter cover plate 23 and the mounting portion 221 of the filter cover plate 23. In a specific embodiment, the mounting portion 221 of the filter plate 22 is fixed to the corresponding position of the filter cover plate 23 by bolts, and the filter sealing gasket 25 is provided between the two. The filter sealing gasket 25 is made of pressure-resistant and wear-resistant sealing material, such as rubber, silicone, or polytetrafluoroethylene. Its thickness and hardness are designed according to the structure and operating pressure of the filter plate 22 to ensure that a uniformly stressed sealing layer is formed after installation and locking. During operation, the dust-laden airflow enters the filter body 1 and is separated from the dust through the filter section 222 of the filter plate 22. Since there is a joint interface between the mounting section 221 and the filter cover plate 23, if there is no sealing structure, the dust-laden airflow may leak through the gaps, resulting in a decrease in filtration effect and dust escape. By setting the filter sealing gasket 25, this leakage path is effectively blocked, ensuring a single channel for the filtered airflow and improving the filtration accuracy and system operation stability.

[0033] In one embodiment, see Figure 1 , Figure 3and Figure 4 As shown, the feed inlet at the lower end of the filter body 1 is connected to the feed pipe 7 via a quick connector 6. During operation, dust particles are carried by the airflow into the filter body 1 through the feed pipe 7, then introduced into the feed inlet via the quick connector 6, and enter the chamber for subsequent filtration and separation. The quick connector 6 ensures smooth gas flow while preventing loosening and leakage caused by pipe vibration or airflow impact. When maintenance of the filter or pipe is required, the operator only needs to release the locking structure of the quick connector 6 to quickly disconnect the feed pipe 7, facilitating equipment cleaning or pipe replacement and improving maintenance efficiency.

[0034] In one embodiment, see Figure 1 , Figure 3 and Figure 4 As shown, the upper outlet of the filter body 1 is connected to the discharge pipe 8 via a quick connector 6. During operation, the clean airflow or dust powder separated by the filter plate 22 is discharged from the upper outlet of the filter body 1, passes through the quick connector 6, and enters the discharge pipe 8, which is then transported to the downstream system. The quick connector 6 not only ensures the sealing stability between the discharge pipe 8 and the outlet, but also facilitates equipment cleaning or pipeline replacement when maintenance, replacement, or cleaning of the discharge pipe 8 is required, thus improving maintenance efficiency.

[0035] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the blockage detection component 5 includes a mounting bracket 51, which is disposed on the outer wall of the filter body 1. A detection pipe 52 is disposed on the mounting bracket 51, and a pressure transmitter 53 is disposed on the detection pipe 52. In a specific embodiment, the blockage detection component 5 includes a mounting bracket 51, which is welded or screwed to the outer wall of the filter body 1. The filter body 1 is divided into an upper chamber 3 and a lower chamber 4 by the dust removal and filtration assembly 2. When the ash is pneumatically conveyed through the filter plate 22, the dust is deposited on the through holes 223 on the filter plate 22. If the filter screen begins to clog, the pressure difference between the upper chamber 3 and the lower chamber 4 will gradually increase. Mounting bracket 51 is fixed to the outer wall of filter body 1 to support detection pipe 52. Detection pipe 52 is connected to upper chamber 3 and lower chamber 4 respectively, and discharges the gas pressure inside the chamber to the external detection position. Pressure transmitter 53 (such as Chongqing Chuanyi PDS803) is installed on detection pipe 52 to convert the pressure value into an electrical signal and transmit it to control system 100. The control system 100 calculates the pressure difference between the upper chamber 3 and the lower chamber 4 in real time and compares it with the preset threshold. When the pressure difference exceeds the set threshold but is lower than the compressed air pressure of the feed pipe 7, it indicates that the filter plate 22 is partially blocked. The system triggers an audible and visual alarm to prompt the operator to check or prepare to replace the filter plate 22. When the pressure difference rises to near or reach the compressed air pressure of the pipe, it indicates that the filter plate 22 is severely blocked or the pipe is close to overpressure. The system automatically triggers a stop feeding command, closes the feed valve or cuts off the air supply to prevent the equipment from overpressure or the ash conveying system from paralyzing. The specific work process is divided into three stages; During the pressure detection stage, the dust-laden airflow enters the filter body 1 through the feed pipe 7. The airflow passes through the lower chamber 4 and the upper chamber 3, and the dust is separated by the filter plate 22. The detection pipe 52 transmits the pressure of the lower chamber 4 and the upper chamber 3 to the pressure transmitter 53 to collect pressure data in real time. During the data calculation and alarm judgment stage, the pressure transmitter 53 converts the pressure data into an electrical signal and transmits it to the control system 100. The system calculates the pressure difference and compares it with the set threshold. If the pressure difference is less than the threshold, the filter plate 22 is normal and continues to operate. If the pressure difference is greater than or equal to the threshold but less than the inlet pressure of feed pipe 7: the system will issue an audible and visual alarm, indicating that filter plate 22 is partially blocked; If the pressure difference is greater than or equal to the air inlet pressure of feed pipe 7, the system will issue a stop feeding command, close the feed valve or cut off the air inlet to prevent overpressure. During the filter plate 22 replacement stage, when the alarm is triggered, the operator can remove the filter cover 23 to observe the status of the filter plate 22. By removing the mounting part 221, the entire filter plate 22 can be replaced. After installation, ensure that the cover gasket 24 and the filter gasket 25 are intact, reset the system, reopen the feed valve or air source, and restore normal ash conveying operation.

[0036] In one embodiment, see Figure 1 , Figure 2 and Figure 3As shown, the diameter of the filter section 222 is 2-2.5 times the diameter of the feed pipe 7 and the discharge pipe 8. In a specific embodiment, the diameter D of the filter section 222 of the filter plate 22 is designed to be 2 to 2.5 times the diameter of the feed pipe 7 and the discharge pipe 8. In one specific embodiment, if the diameters of the feed pipe 7 and the discharge pipe 8 are both 50 mm, then the diameter D of the filter section 222 can be designed to be 100 to 125 mm. Within this diameter range, the through holes 223 of the filter plate 22 are evenly arranged to ensure uniform gas flow and sufficient dust deposition in the filter section 222. During operation, the dust-laden airflow enters the filter body 1 through the feed pipe 7 and then enters the larger diameter filter section 222. Because the diameter of the filter section 222 is relatively larger than that of the inlet and outlet pipes, the gas velocity decreases, the flow is more uniform, and dust particles can be effectively deposited on the surface of the through holes 223, thereby improving filtration efficiency and reducing local wear. The discharge pipe 8 is connected to the upper or lower end of the filter section 222 to ensure that the filtered airflow is smoothly discharged and to maintain the overall pressure stability of the system.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A pneumatic conveying and filtration device for sintering dust removal powder, comprising a filter body (1), characterized in that, The filter body (1) is provided with a dust removal filter assembly (2) in the middle. The dust removal filter assembly (2) divides the filter body (1) into an upper chamber (3) and a lower chamber (4). Both the upper chamber (3) and the lower chamber (4) are provided with a blockage detection assembly (5).

2. The sintering dust removal powder pneumatic conveying and filtering device according to claim 1, characterized in that, The dust removal and filtration assembly (2) includes a guide mounting plate (21), which is located in the middle of the inner wall of the filter body (1). A filter plate (22) is detachably connected to the guide mounting plate (21), and the filter plate (22) is detachably connected to the filter cover plate (23).

3. The sintering dust removal powder pneumatic conveying and filtering device according to claim 2, characterized in that, The filter plate (22) includes a mounting part (221), which is detachably connected to the guide mounting plate (21) and the filter cover plate (23). A filter part (222) is provided on one side of the mounting part (221), and a plurality of through holes (223) are provided on the filter part (222).

4. The sintering dust removal powder pneumatic conveying and filtering device according to claim 3, characterized in that, The diameter R of the through hole (223) is 4-6 mm.

5. The sintering dust removal powder pneumatic conveying and filtering device according to claim 3, characterized in that, A cover sealing gasket (24) is provided on one side of the upper part of the filter cover (23).

6. The sintering dust removal powder pneumatic conveying and filtering device according to claim 3, characterized in that, A filter sealing gasket (25) is provided between the filter cover plate (23) and the mounting part (221) of the filter plate (22).

7. The sintering dust removal powder pneumatic conveying and filtering device according to claim 3, characterized in that, The filter body (1) is connected to a feed pipe (7) at its lower feed inlet via a quick connector (6).

8. The sintering dust removal powder pneumatic conveying and filtering device according to claim 7, characterized in that, The upper outlet of the filter body (1) is connected to a discharge pipe (8) via a quick connector (6).

9. The sintering dust removal powder pneumatic conveying and filtering device according to claim 1, characterized in that, The blockage detection component (5) includes a mounting bracket (51), which is disposed on the outer wall of the filter body (1). A detection pipe (52) is disposed on the mounting bracket (51), and a pressure transmitter (53) is disposed on the detection pipe (52).

10. A pneumatic conveying and filtering device for sintering dust removal powder according to claim 8, characterized in that, The diameter of the filter section (222) is 2-2.5 times the diameter of the feed pipe (7) and the discharge pipe (8).

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