Pulse high pressure airflow dust fall cleaning device

Abstract

The utility model belongs to dust cleaning technical field discloses a kind of pulse high-pressure airflow dust cleaning device, including venturi pipe last tour of exhaust pipe in series on dust removal device, first poppet valve is equipped in the exhaust pipe at dust removal device air outlet connection, the air outlet end of exhaust pipe is equipped with second poppet valve, the exhaust pipe between first poppet valve and second poppet valve forms cleaning section, the cleaning section is equipped with cleaning gas inlet pipe, the outside of cleaning gas inlet pipe is equipped with the pressure gas holder of high-pressure cleaning gas injection into cleaning section, pulse valve is equipped on the cleaning gas inlet pipe.The utility model uses pulse high-pressure airflow cleaning, without direct contact inner wall of pipeline, clean thoroughly and not damage equipment;Spiral arrangement nozzle can enhance airflow disturbance effect, improve the efficiency of shaking off dust.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression and cleaning technology, and in particular to a pulsed high-pressure airflow dust suppression and cleaning device. Background Technology

[0002] Dust pollution in feed mills mainly originates from raw material crushing, feed mixing, and packaging processes. The dust consists of organic dust such as corn flour and soybean meal. This dust causes dust accumulation on the workshop floor, and inhalation can easily trigger coughing. It can also pose minor hygiene hazards due to dust buildup. To reduce dust, dust suppression and removal devices are installed at each stage of feed production, and these devices all have an exhaust pipe. This organic dust is adhesive and easily adheres to the inner wall of the pipe, resulting in a small amount of untreated dust remaining in the exhaust pipe. The main components of this dust are organic, lipid-containing dust such as rice flour and soybean meal. Although the amount of dust is small, long-term use can cause dust to adhere to the inner wall of the exhaust pipe, leading to secondary pollution and affecting the effectiveness of the dust removal device. Therefore, regular cleaning of the dust in the exhaust pipe is necessary. Currently, common cleaning methods rely on manual or mechanical scraping, which is inefficient, incomplete, and can easily damage the pipes. Summary of the Invention

[0003] To overcome the technical defects of the existing technology, this utility model provides a pulse high-pressure airflow dust suppression and cleaning device.

[0004] The technical solution adopted by this utility model is: a pulse high-pressure airflow dust removal and cleaning device, including a venturi tube connected in series with the exhaust pipe of the dust removal device, a first lifting valve at the connection between the exhaust pipe and the exhaust outlet of the dust removal device, a second lifting valve at the exhaust outlet of the exhaust pipe, the exhaust pipe between the first lifting valve and the second lifting valve forming a cleaning section, the cleaning section being provided with a cleaning gas inlet pipe, a pressure storage tank for injecting high-pressure cleaning gas into the cleaning section being provided outside the cleaning gas inlet pipe, and a pulse valve being provided on the cleaning gas inlet pipe; The cleaning section is equipped with a jet pipe spirally arranged along the inner wall of the exhaust pipe. The jet pipe is equipped with multiple nozzles. Downstream of the diffuser end of the venturi tube, the exhaust pipe is equipped with an grease adsorption filter to adsorb grease during daily exhaust. A dust hopper is located directly below the grease adsorption filter. A dust outlet pipe is located at the bottom of the dust hopper. A filter bag is connected to the bottom of the dust outlet pipe. A dust discharge gap is left between the bottom end of the grease adsorption filter and the dust hopper.

[0005] Preferably, the ash hopper is positioned at a horizontal position in the cleaning section.

[0006] Preferably, the exhaust pipe is equipped with a pressure gauge on the cleaning section to monitor the air pressure in the cleaning section during cleaning.

[0007] Preferably, it also includes a controller, and the first lifting valve, the second lifting valve, the pulse valve, and the pressure gauge are all electrically connected to the controller.

[0008] Preferably, an inclined ash guiding slope is provided between the exhaust pipe and the ash hopper.

[0009] Preferably, the nozzle's air outlet direction is toward the grease adsorption filter.

[0010] Preferably, the pressure storage tank is provided with an inflation pipe, the inflation pipe is provided with a one-way inflation valve, and the end of the inflation pipe is connected to an external inflation device to inflate the pressure storage tank and maintain the gas pressure inside the pressure storage tank.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model sets a first lifting valve and a second lifting valve at both ends of the exhaust pipe of the dust removal device. After the first lifting valve and the second lifting valve are closed, a clean section is formed. Then, high-pressure pulse cleaning gas is injected into the clean section through a pressure storage tank and a pulse valve. Through a spiral jet pipe and a nozzle facing the filter screen, the energy of the pulse high-pressure airflow is concentrated on the inner wall of the pipe and the downstream filter screen. The pulse valve opens and closes continuously, thereby generating intermittent pulse airflow. The jet continuously exchanges mass and momentum with the surrounding gas, inducing the surrounding gas to flow forward together, forming a cone-shaped flow field that diffuses to the surroundings, thereby generating expansion and shaking, shaking off the dust on the pipe and the filter screen. The generated dust gas is discharged through the dust outlet pipe and collected by the filter bag, thus completing the cleaning work. After cleaning, the first lifting valve and the second lifting valve are opened, and the exhaust pipe can be used for normal exhaust. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of normal exhaust of the present invention; Figure 3 This is a system block diagram of the present invention.

[0014] Explanation of reference numerals in the attached drawings: 1. Dust removal device; 2. Exhaust pipe; 3. Venturi tube; 4. First lifting valve; 5. Second lifting valve; 6. Clean gas inlet pipe; 7. Pressure storage tank; 8. Pulse valve; 9. Jet pipe; 10. Nozzle; 11. Grease adsorption filter; 12. Dust hopper; 13. Dust outlet pipe; 14. Filter bag; 15. Dust guide slope; 16. Pressure gauge; 17. Controller; 18. Inflation pipe; 19. One-way inflation valve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0016] like Figures 1 to 3 As shown, this embodiment provides a pulse high-pressure airflow dust suppression and cleaning device, including a Venturi tube 3 connected in series at the end of the exhaust pipe 2 of the dust removal device 1. The exhaust pipe 2 has a first lift valve 4 at its connection with the exhaust outlet of the dust removal device 1, and a second lift valve 5 at its outlet end. The exhaust pipe 2 between the first lift valve 4 and the second lift valve 5 forms a cleaning section. When both the first lift valve 4 and the second lift valve 5 are closed simultaneously, this section of the exhaust pipe forms an independent, sealed chamber isolated from the production operation, creating conditions for internal cleaning. The function of the Venturi tube 3 is to utilize the energy conversion of fluid in a variable-diameter pipe to create a controllable, gentle negative pressure or ejection effect downstream of the cleaning section. When the pulse valve opens, high-pressure gas is instantly injected into the cleaning section, causing a sudden increase in pressure within the chamber. After completing the impact cleaning, this high-pressure gas carries the detached dust through the grease adsorption filter and flows towards the single outlet (Venturi tube). When the high-speed airflow passes through the throat (narrowest part) of the Venturi tube 3, according to Bernoulli's principle, its velocity is at its maximum and its static pressure is at its minimum. This creates a localized low-pressure area (i.e., a slight negative pressure) in the throat and the surrounding diffusion initiation region.

[0017] This localized micro-negative pressure acts like a gentle "suction pump," creating a directional traction force on the gas within the upstream cleaning section. It helps guide the dust-laden airflow in a more orderly manner downstream (towards the grease trap and dust hopper), rather than causing it to flow turbulently within the chamber. This promotes the settling and movement of the dislodged dust towards the collection device (dust hopper), improving cleaning efficiency and reducing secondary dust adhesion in other parts of the chamber.

[0018] A cleaning gas inlet pipe 6 is provided in the cleaning section. A pressure storage tank 7 is located outside the cleaning gas inlet pipe 6 to inject high-pressure cleaning gas into the cleaning section. A pulse valve 8 is installed on the cleaning gas inlet pipe 6. Clean gas is injected into the cleaning section through the cleaning gas inlet pipe 6. A pressure storage tank 7 is connected to the cleaning gas inlet pipe 6 to store and provide a stable high-pressure gas source. An inflation pipe 18 with a one-way inflation valve 19 can be connected to the pressure storage tank 7 to connect to an external gas source for pressurization. A pulse valve 8 is installed on the cleaning gas inlet pipe 6 to control the release mode of the high-pressure gas (instantaneous opening / closing, forming a pulse). The core of the cleaning section is the jet pipe 9, which extends spirally along the inner wall of the exhaust pipe 2, and has multiple nozzles 10 evenly distributed on it.

[0019] Within the cleaning section, downstream of the diffuser ends of the jet pipe 9 and the venturi tube 3, an grease-absorbing filter 11 is installed. This filter is specifically designed to absorb fine dust containing grease. A dust hopper 12 is located directly below the grease-absorbing filter 11, with its bottom connected to a dust outlet pipe 13 and a filter bag 14 at its end for final dust collection. A dust discharge gap is designed between the bottom of the grease-absorbing filter 11 and the inlet of the dust hopper 12 to ensure that dust shaken off by the pulse airflow or detached after self-saturation can fall smoothly into the dust hopper 12. For further airflow guidance, an inclined dust-guiding slope 15 can be installed at the connection between the exhaust pipe 2 and the dust hopper 12.

[0020] The entire cleaning process can be automatically managed by a controller 17 (such as a PLC or microcontroller). The first lifting valve 4, the second lifting valve 5, and the pulse valve 8 are all electrically connected to the controller 17. A pressure gauge 16 (also connected to the controller 17) is installed on the pipe wall of the cleaning section to monitor the pressure changes in the chamber in real time during the cleaning process.

[0021] The device has two main operating modes: normal exhaust mode and cleaning mode.

[0022] Normal exhaust mode: First lift valve 4 and second lift valve 5 are open, pulse valve 8 is closed. The gas purified by dust removal device 1 passes sequentially through the cleaning section and venturi tube 3 before being discharged into the atmosphere. Minor amounts of penetrating grease and dust are trapped by the grease adsorption filter 11.

[0023] Cleaning mode (can be triggered by timer or manually): The controller 17 issues a command to close the first lifting valve 4 and the second lifting valve 5, isolating the cleaning section from the system. The controller 17 opens the pulse valve 8, and the high-pressure gas in the pressure storage tank 7 rushes into the cleaning section instantly. The gas is ejected through multiple nozzles 10 on the spiral jet pipe 9, forming a strong, rotating pulse airflow. This airflow violently impacts the inner wall of the pipe, the jet pipe itself, and the downstream grease adsorption filter 11, generating vibration and shearing force, causing the clump of dust attached to it to peel off. The shaken-off dust slides down the pipe wall or through the dust guide slope 15 under the action of gravity, falls into the dust hopper 12 through the dust discharge gap at the bottom of the grease adsorption filter 11, and finally collects in the filter bag 14. After completing the preset number of pulse cleaning cycles, the pulse valve 8 closes. It can be allowed to stand for a while to allow the dust to settle. Subsequently, the controller 17 first opens the second lifting valve 5, and then opens the first lifting valve 4, to vent any residual dust and gas in the cleaning section and restore the normal exhaust process; during the cleaning process, the pressure gauge 16 can be used to monitor the pressure and prevent overpressure.

[0024] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A pulse high-pressure airflow dust suppression and cleaning device, characterized in that: The system includes a venturi tube (3) connected in series with the exhaust pipe (2) at the end of the dust removal device (1). The exhaust pipe (2) is provided with a first lift valve (4) at the connection point with the exhaust outlet of the dust removal device (1), and a second lift valve (5) is provided at the outlet end of the exhaust pipe (2). The exhaust pipe (2) between the first lift valve (4) and the second lift valve (5) forms a cleaning section. The cleaning section is provided with a cleaning gas inlet pipe (6). A pressure storage tank (7) for injecting high-pressure cleaning gas into the cleaning section is provided outside the cleaning gas inlet pipe (6). A pulse valve (8) is provided on the cleaning gas inlet pipe (6). The cleaning section is provided with a jet pipe (9) spirally arranged along the inner wall of the exhaust pipe (2). The jet pipe (9) is provided with multiple nozzles (10). The exhaust pipe (2) is provided with an oil adsorption filter (11) for adsorbing oil during daily exhaust process downstream of the diffuser end of the venturi tube (3). A dust hopper (12) is provided directly below the oil adsorption filter (11). A dust outlet pipe (13) is provided at the bottom of the dust hopper (12). A filter bag (14) is connected to the bottom of the dust outlet pipe (13). A dust discharge gap is left between the bottom end of the oil adsorption filter (11) and the dust hopper (12).

2. The pulse high-pressure airflow dust suppression and cleaning device according to claim 1, characterized in that: The ash hopper (12) is positioned horizontally in the cleaning section.

3. The pulse high-pressure airflow dust suppression and cleaning device according to claim 1, characterized in that: The exhaust pipe (2) is equipped with a pressure gauge (16) on the cleaning section to monitor the air pressure of the cleaning section during cleaning.

4. The pulse high-pressure airflow dust suppression and cleaning device according to claim 3, characterized in that: It also includes a controller (17), and the first lift valve (4), the second lift valve (5), the pulse valve (8), and the pressure gauge (16) are all electrically connected to the controller (17).

5. The pulse high-pressure airflow dust suppression and cleaning device according to claim 1, characterized in that: An inclined ash guide slope (15) is provided between the exhaust pipe (2) and the ash hopper (12).

6. The pulse high-pressure airflow dust suppression and cleaning device according to claim 1, characterized in that: The nozzle (10) is directed to grease adsorption filter (11).

7. The pulse high-pressure airflow dust suppression and cleaning device according to claim 1, characterized in that: The pressure storage tank (7) is provided with an inflation pipe (18), and the inflation pipe (18) is provided with a one-way inflation valve (19). The end of the inflation pipe (18) is connected to an external inflation device to inflate the pressure storage tank (7) and maintain the gas pressure inside the pressure storage tank (7).

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