A pulse backflushing cleaning experimental device with an ultrasonic module and a dust removal module.

Abstract

This invention discloses a pulse backflushing cleaning experimental device with an ultrasonic module and a dust-raising module, comprising a buffer gas tank, a pulse backflushing module, an air duct, a T-junction pipe, a dust-raising module, a frame, a powder storage tank, a control system distribution box, and a filtration system chamber. The dust-raising module, based on the Venturi effect, consists of a speed-regulating fan and a dust concentration sensor forming a closed-loop feedback system to precisely control the concentration of the generated dust cloud. The filtration system chamber houses a sintered plate filter element, a weighing sensor, an ultrasonic module, and a pressure sensor, enabling real-time monitoring of the filter element's status and research into ultrasonic-assisted cleaning. The pulse backflushing module features a quick-connect threaded connector, allowing for rapid replacement of backflushing nozzles with different structures without tools, improving experimental efficiency. This invention integrates controllable dust generation, multi-nozzle switching, multi-dimensional detection, and ultrasonic-assisted cleaning, providing experimental conditions closer to real-world scenarios and convenient operation, offering a reliable experimental support platform for optimizing pulse backflushing technology.

Description

Technical Field

[0001] This invention relates to the field of industrial dust collector technology, specifically to a pulse backflushing cleaning experimental device with an ultrasonic module and a dust removal module. Background Technology

[0002] Pulse jet cleaning technology is crucial for maintaining the long-term stable operation of equipment such as bag filters, sintered plate dust collectors, and ceramic filters. The effectiveness of pulse jet cleaning directly affects the operating resistance of the equipment, the lifespan of the filter elements, and the overall energy consumption of the equipment.

[0003] While existing pulse jet cleaning experimental devices have made progress in certain aspects, they still have significant shortcomings. For example, patent CN102949905A discloses an experimental device with a movable tube sheet and multiple combined jet pipes. This device moves the tube sheet via a pulley system and uses a series of combined jet pipes to test the cleaning effect of different numbers of filter bags, solving some of the disassembly difficulties. However, this device lacks simulation of real dust-laden conditions and cannot form a controllable and repeatable dust layer on the filter bag surface, resulting in a weak correlation between the measured cleaning efficiency and actual industrial operating conditions. Patents CN102908840A and CN102961934A propose a directional multi-hole jet nozzle and a self-excited oscillating nozzle, respectively, to improve cleaning uniformity and efficiency by optimizing the jet direction and generating pressure oscillation waves. However, these studies focus on structural innovations of the nozzle itself, and their testing platforms are mostly simplified single systems, making it impossible to systematically evaluate different nozzles, different dust concentrations, and different filter elements on the same platform. Existing experimental devices mainly suffer from the following problems: (1) Low system integration and limited functionality. Most experimental devices currently only include a pulse jet system and filter cartridges, lacking a dust-generating module that can accurately generate dust and stably control its concentration, and also lacking a real-time detection module that can quantify the dust removal effect. Patent No. CN213986116U discloses a detection system with a back-flushing device, but it mainly serves to test the back-flushing recovery performance of filters, not for systematic research on jet parameter optimization, and does not involve a quick-change design for multiple nozzles. Experimenters often need to manually coat the filter cartridges with dust on other equipment before transferring them to the jet jet test bench for testing. This fragmented process introduces uncontrollable human error.

[0004] (2) The experimental preparation is cumbersome and the testing efficiency is low. When conducting comparative experiments on nozzles with different spray orifice diameters or different structures, traditional devices usually require the complete disassembly of the spray pipeline and replacement of the entire spray pipe or nozzle, which is time-consuming and laborious. Patent No. CN114910260A proposes a plastic sintering plate pulse spraying experimental system that can change the spray orifice diameter by adjusting the ring and the adaptation cylinder, which avoids frequent replacement of the spray pipe. However, its structure is complex and it is still limited to the adjustment of a single orifice diameter parameter. It cannot be compatible with various backflush nozzles with completely different structural principles, such as ejector nozzles, multi-hole nozzles, and self-excited oscillating nozzles.

[0005] (3) The experimental environment is out of sync with real working conditions. Most experimental platforms conduct dust removal tests under dust-free or static dust source conditions, which cannot simulate the dynamic, continuous, and concentration-controllable dust load faced by dust collectors in actual operation. Such idealized test conditions cannot truly reflect the resistance growth characteristics, dust removal efficiency, and residual resistance changes of filter elements under actual cyclic conditions, and the experimental results have limited reference value.

[0006] In summary, although existing technologies have made some progress in optimizing individual components or implementing specific functions of pulse-jet cleaning devices, a comprehensive experimental platform that highly integrates functions such as controlled dust generation, system filtration, and rapid replacement of multiple nozzles has yet to emerge. Therefore, there is an urgent need to develop a highly integrated pulse-jet cleaning experimental device that simulates real-world operating conditions and is easy to operate, capable of systematically and accurately evaluating the cleaning performance of backflushing nozzles with different structures under dynamic conditions close to actual industrial applications. Summary of the Invention

[0007] The purpose of this invention is to provide a pulse backflushing cleaning experimental device with an ultrasonic module and a dust generation module, which can quickly integrate controllable dust generation, system filtration and multiple nozzles into one, thereby reducing manual intervention and improving the accuracy of dust removal performance evaluation, so as to solve the shortcomings of the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: An experimental device for pulse backflushing cleaning with an ultrasonic module and a dust removal module includes a frame, and a buffer gas tank, a pulse backflushing module, an air duct, a three-way pipe, a dust removal module, and a control system distribution box connected to the frame. The frame has a filtration system chamber and a powder storage tank inside, with the powder storage tank located below the filtration system chamber. The filtration system chamber has a door on the outside. Two door hinges are installed on the side of the frame, and the door is fixed to the door hinges.

[0009] Furthermore, the dust-raising module, based on the Venturi effect, draws in dust from the filtration system chamber and blows it out to generate a dust cloud. The dust-raising module includes a speed-regulating fan and a dust concentration sensor, which together form a closed-loop control system for generating a dust cloud of a specified concentration within the filtration system chamber. The dust-raising module also includes a geared motor, a coupling, a dust storage bin cover, a stirring rod, a dust storage bin, a butterfly valve, clamps, a converging and expanding tube, and a dust diffusion orifice plate. The dust storage bin cover is located on top of the dust storage bin, and a stirring rod is installed inside the dust storage bin. The output shaft of the geared motor is connected to the stirring rod via a coupling. The bottom of the dust storage bin is connected to the upper dust inlet end of the converging and expanding tube via a butterfly valve, and clamps are used to secure the two connections.

[0010] Furthermore, the filtration system chamber is equipped with an ultrasonic module, which emits frequency-adjustable sound waves to study the auxiliary effect of different frequency ultrasonic waves on dust removal. The filtration system chamber also includes a sintered plate filter element, a buffer rubber gasket, a fixed tube sheet, a weighing sensor, fixing bolts, a pressure sensor bracket, a pressure sensor, a dust collection conical shell, and temperature, humidity, and oxygen content sensors. The fixing bolts pass through the buffer rubber gasket, the fixed tube sheet, the weighing sensor, and the sintered plate filter element in sequence and are fixed to the ultrasonic module. The pressure sensor is fixed on the pressure sensor bracket, which is located inside the sintered plate filter element. The temperature, humidity, and oxygen content sensors are installed on one side of the filtration system chamber to monitor environmental parameters within the chamber. The dust collection conical shell is located at the bottom of the filtration system chamber, and its outlet is connected to the powder storage tank.

[0011] Furthermore, the pulse backflush module includes a pulse solenoid valve, a pulse backflush pipe, and a backflush nozzle. The air inlet of the pulse solenoid valve is connected to a buffer gas tank, and the air outlet is connected to the pulse backflush pipe. The backflush nozzle is installed on the pulse backflush pipe through a threaded connector. The pulse backflush module is used to test the dust removal performance of different backflush nozzles.

[0012] Furthermore, the air outlet of the speed-regulating fan is connected to the air inlet of the converging and expanding tube, the air outlet of the converging and expanding tube is connected to the filter system chamber, and the upper part of the powder inlet of the converging and expanding tube is provided with a groove, on which the dust diffusion plate is placed.

[0013] Furthermore, the tapered and diffuser is designed based on the Venturi effect: the airflow flows in from the air inlet end, and the flow velocity increases and the pressure decreases when passing through the throat where the pipe diameter gradually narrows, forming a negative pressure zone. This negative pressure zone is located at the powder inlet opening and is used to suck up the powder falling from the powder storage bin.

[0014] Furthermore, the dust diffusion plate is provided with equidistant circular holes, and the size and spacing of the holes can be adjusted according to the characteristics of the experimental powder material.

[0015] Furthermore, there are two weighing sensors, which are fixed at both ends of the fixing hole of the sintered plate filter element, respectively, for real-time detection of the dust deposited on the surface of the sintered plate filter element.

[0016] Furthermore, the pulse backflush pipe is provided with equally spaced sealing pipe thread holes in its radial direction. The threaded connector is connected to the pulse backflush pipe through the pipe thread, so that backflush nozzles with different structures can be freely replaced, thereby verifying the dust removal performance of different backflush nozzles.

[0017] Furthermore, the three ports of the three-way pipe are respectively connected to duct valve A, duct valve B and duct valve C. Each duct valve includes a duct valve blade and a duct valve housing. The opening and closing of the pipe is controlled by rotating the valve blade. Among them, duct valve A is connected to the air outlet of the filtration system chamber through the duct; duct valve B is connected to the air inlet of the speed-regulating fan in the ash removal module; and duct valve C is connected to the air to form a bypass.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust-raising module. The dust-raising module integrates a tapered and diffused tube based on the Venturi effect and adopts a closed-loop control strategy of a speed-regulating fan and a dust concentration sensor. It can generate a dust cloud of a specified concentration inside the filter system chamber, making the experiment closer to the real dynamic dust load situation. The measured data such as filter element resistance additive curve and residual resistance are closer to the actual working conditions, and the experimental data have strong guiding significance. 2. The present invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust removal module. The pulse backflushing pipe adopts a quick-change threaded connector design and is tapped with a sealing pipe thread to facilitate the replacement of the backflushing nozzle. Compared with the existing operation method that requires the entire blow pipe to be disassembled before the nozzle can be replaced, the present invention can replace the backflushing nozzle in seconds without any tools, which greatly shortens the preparation time of the experiment, facilitates large-scale multivariate experiments, greatly improves experimental efficiency, and makes the operation more convenient. 3. The present invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust removal module, which integrates multiple detection methods: the surface pressure of the sintered plate filter element is detected in real time by a pressure sensor; the amount of dust deposited and removed on the filter element surface is calculated accurately in real time by a weighing sensor, realizing an indirect quantitative evaluation of cleaning efficiency; and the influence of different sound wave frequencies on the cleaning effect can be studied by a variable frequency ultrasonic module. The present invention provides experimental support for a deeper understanding of the cleaning mechanism through multi-dimensional data synchronous acquisition, and the evaluation of cleaning indicators is more comprehensive. 4. This invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust removal module. Through a combination design of a three-way pipe and multiple air duct valves, it achieves convenient switching between multiple operating modes. It can perform both static dust accumulation tests and dynamic cyclic cleaning tests on filter elements. A single experimental platform meets multiple experimental requirements, reduces equipment procurement costs, has a high degree of functional integration, and possesses significant application value and promising prospects for widespread adoption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the experimental device of the present invention when the hatch is open; Figure 2 This is a schematic diagram of the overall structure of the experimental apparatus of the present invention when the hatch is closed; Figure 3 This is a schematic diagram of the frame structure in the experimental apparatus of the present invention; Figure 4 This is a schematic diagram of the internal structure of the filtration system chamber when the experimental device of the present invention has a concealed hatch; Figure 5 This is a schematic diagram of the pulse backflush module in the experimental apparatus of the present invention; Figure 6 This is a cross-sectional view showing the structural relationship of the ash-generating module in the experimental apparatus of the present invention. Figure 7 This is a cross-sectional view showing the structural relationship of the sintered plate filter element installation inside the chamber of the experimental apparatus of the present invention. Figure 8 This is a schematic diagram of the air duct circulation system in the experimental apparatus of the present invention; Figure 9 This is a schematic diagram of the three-way pipe in the air circulation system of the experimental device of the present invention.

[0020] In the diagram: 1. Buffer gas tank; 2. Pulse backflush module; 201. Pulse solenoid valve; 202. Pulse backflush pipe; 203. Threaded connector; 204. Backflush nozzle; 3. Air duct; 4. T-pipe; 401. Air duct valve A; 402. Air duct valve B; 403. Air duct valve C; 404. Air duct valve blade; 405. Air duct valve housing; 5. Dust removal module; 501. Gear motor; 502. Coupling; 503. Powder storage silo cover; 504. Stirring rod; 505. Powder storage silo; 506. Butterfly valve; 507. Dust concentration sensor; 508. Card 509. Hoop; 510. Gradient-expanding pipe; 511. Variable speed fan; 512. Dust diffusion perforated plate; 6. Frame; 7. Door hinge; 8. Door; 9. Powder storage tank; 10. Control system distribution box; 11. Filtration system chamber; 1101. Sintered plate filter element; 1102. Buffer rubber gasket; 1103. Fixed tube sheet; 1104. Weighing sensor; 1105. Fixing bolt; 1106. Ultrasonic module; 1107. Pressure sensor bracket; 1108. Pressure sensor; 1109. Dust collection conical shell; 1110. Temperature, humidity and oxygen content sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-9 This invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module, mainly used for studying the pulse backflushing cleaning performance of sintered plastic plate dust collectors. Its overall structure is as follows: Figure 1-2 As shown, it mainly includes a frame 6, and a buffer air tank 1, a pulse backflushing module 2, an air duct 3, a three-way pipe 4, a dust removal module 5, and a control system power distribution box 10 connected to the frame 6; the frame 6 is equipped with a filtration system chamber 11 and a powder storage tank 9 inside, the powder storage tank 9 is located below the filtration system chamber 11, and the filtration system chamber 11 is equipped with a door 8 on the outside. Specifically, two door hinges 7 are installed on the side of the frame 6, and the door 8 is fixed on the door hinges 7.

[0023] like Figure 6As shown, the dust-raising module 5 in this embodiment of the invention includes a geared motor 501, a coupling 502, a powder storage hopper cover 503, a stirring rod 504, a powder storage hopper 505, a butterfly valve 506, a dust concentration sensor 507, a clamp 508, a converging and expanding tube 509, a speed-regulating fan 510, and a dust diffusion perforated plate 511. The powder storage hopper 505 is used to store experimental powder. The powder storage hopper cover 503 is located on the top of the powder storage hopper 505, and a stirring rod 504 is located inside the powder storage hopper 505. The output shaft of the geared motor 501 is connected to the stirring rod 504 via the coupling 502. The geared motor 501 drives the stirring rod 504 to rotate to prevent the experimental powder from clumping. The bottom of the powder storage hopper 505 is connected to the upper powder inlet end of the converging and expanding tube 509 via the butterfly valve 506. The two connections are fixed with clamps 508. The butterfly valve 506 is used to fine-tune the powder flow rate.

[0024] The outlet of the variable-speed fan 510 is connected to the inlet of the converging-diffuser 509. The outlet of the converging-diffuser 509 is connected to the filter system chamber 11. The converging-diffuser 509 is designed based on the Venturi effect: airflow flows in from the inlet, and as it passes through the throat where the diameter gradually narrows, the flow velocity increases and the pressure decreases, forming a negative pressure zone. This negative pressure zone is located at the powder inlet opening and is used to draw in the powder falling from the powder storage bin 505. A groove is provided on the upper part of the powder inlet of the converging-diffuser 509, and a dust diffusion plate 511 is placed on the groove. The dust diffusion plate 511 has equidistantly distributed circular holes, and the size and spacing of the circular holes can be adjusted according to the characteristics of the experimental powder material. After the powder is sucked in, it first impacts the dust diffusion plate 511 and disperses. After falling into the converging and expanding tube 509, the powder is further impacted and dispersed by the high-speed airflow. Finally, a uniform dust cloud is formed at the air outlet of the converging and expanding tube 509 and sent into the filter system chamber 11.

[0025] In this embodiment, the dust-generating module 5 is mainly used to simulate the dust-laden airflow in the actual production process and generate a dust cloud of a specified concentration within the filtration system chamber 11. Its working principle is based on the Venturi effect. The airflow blown by the variable-speed fan 510 forms a negative pressure in the smaller diameter section of the converging and expanding pipe 509. The powder used in the experiment is drawn in through the butterfly valve 506 and the dust diffusion plate 511, and is impacted and dispersed by the high-speed airflow, forming a dust cloud. To ensure the concentration of the dust cloud, the variable-speed fan 510 and the dust concentration sensor 507 can form a closed-loop control system. The fan speed is automatically adjusted according to the real-time concentration value fed back by the sensor, generating a dust cloud of a specified concentration within the filtration system chamber 11.

[0026] like Figure 4 , Figure 7As shown, the filtration system chamber 11 in this embodiment of the invention is the unit that performs the core experimental function. It includes a sintered plate filter element 1101, a buffer rubber gasket 1102, a fixed tube sheet 1103, a weighing sensor 1104, a fixing bolt 1105, an ultrasonic module 1106, a pressure sensor bracket 1107, a pressure sensor 1108, a dust collection conical shell 1109, and temperature, humidity, and oxygen content sensors 1110. The fixing bolt 1105 passes sequentially through the buffer rubber gasket 1102, the fixed tube sheet 1103, the weighing sensor 1104, and the sintered plate filter element 1101 to fix it to the ultrasonic module 1106. The ultrasonic module 1106 can emit frequency-adjustable sound waves to study the auxiliary effect of different frequency ultrasonic waves on dust removal. Two weighing sensors 1104 are provided, each fixed to the sintered plate. The filter element 1101 has two fixing holes at both ends for real-time detection of the dust deposited on the surface of the sintered plate filter element 1101. By calculating the mass difference before and after dust removal, the dust removal effect is indirectly quantified. The pressure sensor 1108 is fixed on the pressure sensor bracket 1107, which is located inside the sintered plate filter element 1101, for real-time monitoring of pressure changes upstream and downstream of the sintered plate filter element 1101. The temperature, humidity and oxygen content sensor 1110 is installed on one side of the filtration system chamber 11 for monitoring environmental parameters inside the chamber to ensure the consistency and safety of experimental conditions. The dust collection conical shell 1109 is located at the bottom of the filtration system chamber 11, and its outlet is connected to the powder storage tank 9. The dust that falls off during filtration and dust removal falls into the bottom of the dust collection conical shell 1109 under the action of gravity and into the powder storage tank 9 for centralized treatment.

[0027] like Figure 5 As shown, the pulse backflush module 2 in this embodiment of the invention includes a pulse solenoid valve 201, a pulse backflush pipe 202, a threaded connector 203, and a backflush nozzle 204. The air inlet of the pulse solenoid valve 201 is threadedly connected to the air outlet of the buffer gas tank 1, and the air inlet of the buffer gas tank 1 is connected to compressed gas. The air outlet of the pulse solenoid valve 201 is connected to the pulse backflush pipe 202. The pulse backflush pipe 202 has equally spaced sealing pipe thread holes in its radial direction. The threaded connector 203 is threadedly connected to the pulse backflush pipe 202, and the backflush nozzle 204 is installed at the outlet end of the threaded connector 203. The pulse backflush module 2 is mainly used to test the dust removal performance of different backflush nozzles 204. Specifically, the pulse backflush pipe 202 is provided with equally spaced sealing pipe thread holes in the radial direction. The threaded connector 203 is connected to the pulse backflush pipe 202 through the pipe thread, so that backflush nozzles 204 with different structures can be freely replaced. The pulse backflush module 2 provides high-pressure pulse airflow to clean the sintered plate filter element 1101, thereby verifying the dust removal performance of different backflush nozzles 204.

[0028] like Figure 1 , Figure 8 , Figure 9 As shown, the experimental apparatus of the present invention also has an air duct circulation system, which can realize the switching of different working modes. Specifically, air duct valves A401, B402 and C403 are respectively connected to the three ports of the three-way pipe 4. Each air duct valve includes an air duct valve blade 404 and an air duct valve housing 405. The opening and closing of the pipe is controlled by rotating the valve blade 404. Among them, air duct valve A401 is connected to the air outlet of the filter system chamber 11 through the air duct 3; air duct valve B402 is connected to the air inlet of the speed-regulating fan 510 in the dust removal module 5; air duct valve C403 is connected to the air to form a bypass.

[0029] Based on the above structural principles, at least the following three working modes can be achieved: (1) Static dust hanging mode: Open the air duct valve C403, air duct valve B402 and air duct valve A401. The dust raising module 5 generates a dust cloud, which flows into the filter system chamber 11 in one direction. The dust is captured by the sintered plate filter element 1101, simulating a continuous filtration process.

[0030] (2) Circulating dust hanging mode: Close the air duct valve C403, open the air duct valve B402 and the air duct valve A401, and the dust-laden airflow circulates inside the filter system chamber 11.

[0031] (3) Dust removal mode: Close duct valve C 403, duct valve B 402 and duct valve A 401. Close all valves to prevent gas flow, and start pulse backflushing module 2 and ultrasonic module 1106 to conduct dust removal experiment.

[0032] It should be noted that the implementation of the above-mentioned technical measures is also inseparable from the design of the control system distribution box 10. The control system distribution box 10 is equipped with a microcontroller, in which parameters such as dust concentration, speed of the variable speed fan, pulse cleaning frequency, and ultrasonic frequency can be set. It can also collect parameters from the pressure sensor 1108 and the weighing sensor 1104 and upload them to the host computer for comprehensive processing, which will not be elaborated here.

[0033] To further explain the working process of the above-mentioned experimental apparatus, this embodiment of the invention also provides an operating method for the experimental apparatus, as follows: Step 1, Preparation stage: Connect the target backflush nozzle 204 to the threaded connector 203, close the butterfly valve 506, pour an appropriate amount of experimental powder into the powder storage bin 505, and close the chamber door 8.

[0034] Step 2, Dust Generation Stage: Set the target dust concentration. Start the variable speed fan 510 and the geared motor 501, open the butterfly valve 506, and the system will automatically enter closed-loop concentration control until the dust concentration in the filter system chamber 11 stabilizes.

[0035] Step 3, Filtration Stage: The dust-laden airflow passes through the sintered plate filter element 1101, and the dust is captured. The pressure change on the filter element surface is monitored by pressure sensor 1108, and the increase in filter element mass is monitored by weighing sensor 1104.

[0036] Step 4, Dust Removal Stage: The pulse solenoid valve 201 is opened. The high-pressure gas in the buffer gas tank 1 is instantly reverse-flowed into the sintered plate filter element 1101 through the pulse backflush pipe 202, the threaded connector 203, and the backflush nozzle 204, blowing off the surface dust layer. If ultrasonic-assisted dust removal is required, the ultrasonic module 1106 is activated simultaneously with the pulse backflush to emit sound waves, and the sound wave frequency is adjusted.

[0037] Step 5: Data Recording: Record the mass change of the filter element before and after cleaning to quantify the cleaning effect; record the changes in the pressure sensor values ​​on the filter element surface; repeat the above experimental steps by changing different nozzle structures, ultrasonic frequencies, pulse backflushing pressures, and other parameters.

[0038] In summary, this invention provides a pulse backflushing cleaning experimental device with an ultrasonic module and a dust-raising module. By integrating an active dust-raising module 5 based on the Venturi effect, and utilizing a speed-regulating fan 510 and a dust concentration sensor 507 to form a closed-loop control, it can accurately and stably generate a dust cloud of a specified concentration within the filtration system chamber 11, thereby realistically simulating the working conditions of an industrial dust collector under dynamic load. The introduction of a quick-change threaded connector 203 in the pulse backflushing module 2 allows experimenters to quickly replace backflushing nozzles 204 with different structures without any tools, improving the efficiency of comparative experiments. The filtration system chamber 11 also integrates an ultrasonic module 1106 and a weighing sensor 1104. Experiments are conducted to verify the coupling of different sound wave frequencies and pulse backflushing for cleaning, optimizing the best cleaning effect. The weighing sensor 1104 provides real-time feedback on the weight of residual dust on the filter element, indirectly evaluating the cleaning effect.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pulse back-flushing soot cleaning test device with an ultrasonic wave module and a soot raising module, characterized in that, It includes a frame (6), and a buffer air tank (1), a pulse backflushing module (2), an air duct (3), a three-way pipe (4), a dust removal module (5), and a control system distribution box (10) connected to the frame (6); the frame (6) is provided with a filter system chamber (11) and a powder storage tank (9) inside, the powder storage tank (9) is located below the filter system chamber (11), and the filter system chamber (11) is provided with a door (8) outside; The dust-raising module (5) absorbs dust from the filter system chamber (11) based on the Venturi effect and blows it out to generate a dust cloud. The dust-raising module (5) includes a speed-regulating fan (510) and a dust concentration sensor (507). The speed-regulating fan (510) and the dust concentration sensor (507) constitute a closed-loop control system for generating a dust cloud of a specified concentration in the filter system chamber (11). The filtration system chamber (11) is equipped with an ultrasonic module (1106). The ultrasonic module (1106) emits frequency-adjustable sound waves to study the auxiliary effect of ultrasonic waves of different frequencies on dust removal. The pulse backflush module (2) includes a pulse solenoid valve (201), a pulse backflush pipe (202), and a backflush nozzle (204). The air inlet of the pulse solenoid valve (201) is connected to the buffer air tank (1), and the air outlet is connected to the pulse backflush pipe (202). The backflush nozzle (204) is installed on the pulse backflush pipe (202) through a threaded connector (203). The pulse backflush module (2) is used to test the dust removal performance of different backflush nozzles (204).

2. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 1, characterized in that: The dust-raising module (5) also includes a geared motor (501), a coupling (502), a powder storage silo cover (503), a stirring rod (504), a powder storage silo (505), a butterfly valve (506), a clamp (508), a shrinking and expanding pipe (509), and a dust diffusion plate (511); the powder storage silo cover (503) is located on the top of the powder storage silo (505), and the powder storage silo (505) is equipped with a stirring rod (504) inside; the output shaft of the geared motor (501) is connected to the stirring rod (504) through the coupling (502); the bottom of the powder storage silo (505) is connected to the upper powder inlet end of the shrinking and expanding pipe (509) through the butterfly valve (506), and the two connections are fixed with clamps (508).

3. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 2, characterized in that: The outlet of the speed-regulating fan (510) is connected to the inlet of the converging and expanding tube (509). The outlet of the converging and expanding tube (509) is connected to the filter system chamber (11). The upper part of the powder inlet of the converging and expanding tube (509) is provided with a groove, and the dust diffusion plate (511) is placed on the groove.

4. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 3, characterized in that: The tapered and diffuser (509) is designed based on the Venturi effect: the airflow flows in from the air inlet end, and the flow velocity increases and the pressure decreases when passing through the throat where the pipe diameter gradually narrows, forming a negative pressure zone. This negative pressure zone is located at the powder inlet end opening and is used to suck up the powder falling from the powder storage bin (505).

5. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 3, characterized in that: The dust diffusion plate (511) has equidistant circular holes, and the size and spacing of the circular holes can be adjusted according to the characteristics of the experimental powder material.

6. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 1, characterized in that: The filtration system chamber (11) also includes a sintered plate filter element (1101), a buffer rubber gasket (1102), a fixed tube sheet (1103), a weighing sensor (1104), a fixing bolt (1105), a pressure sensor bracket (1107), a pressure sensor (1108), a dust collection conical shell (1109), and a temperature, humidity, and oxygen content sensor (1110); the fixing bolt (1105) passes sequentially through the buffer rubber gasket (1102), the fixed tube sheet (1103), and the weighing sensor (1104). The sintered plate filter element (1101) is fixed to the ultrasonic module (1106); the pressure sensor (1108) is fixed on the pressure sensor bracket (1107), the pressure sensor bracket (1107) is located inside the sintered plate filter element (1101), the temperature, humidity and oxygen content sensor (1110) is installed on one side of the filter system chamber (11) to monitor the environmental parameters inside the chamber; the dust collection conical shell (1109) is located at the bottom of the filter system chamber (11), and its outlet is connected to the powder storage tank (9).

7. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 6, characterized in that: Two weighing sensors (1104) are provided, which are fixed at both ends of the fixing hole of the sintered plate filter element (1101) respectively, and are used to detect the mass of dust deposited on the surface of the sintered plate filter element (1101) in real time.

8. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 1, characterized in that: The pulse backflush pipe (202) has equally spaced sealing pipe thread holes in its radial direction. The threaded connector (203) is connected to the pulse backflush pipe (202) through the pipe thread, so that backflush nozzles (204) with different structures can be freely replaced, thereby verifying the dust removal performance of different backflush nozzles (204).

9. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 1, characterized in that: The three ports of the three-way pipe (4) are respectively connected to the air duct valve A (401), air duct valve B (402) and air duct valve C (403). Each air duct valve includes an air duct valve blade (404) and an air duct valve housing (405). The opening and closing of the pipe is controlled by rotating the valve blade (404). Among them, the air duct valve A (401) is connected to the air outlet of the filter system chamber (11) through the air duct (3); the air duct valve B (402) is connected to the air inlet of the speed-regulating fan (510) in the dust removal module (5); the air duct valve C (403) is connected to the air to form a bypass.

10. The pulse backflushing cleaning experimental device with an ultrasonic module and a dust-removing module as described in claim 1, characterized in that: The frame (6) has two door hinges (7) on its side, and the door (8) is fixed on the door hinges (7).

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