Cross-shaped ultrasonic agglomeration pipeline smoke abatement array device based on novel ultrasonic transducer

Abstract

The utility model discloses a cross-shaped ultrasonic agglomeration pipeline smoke abatement array device based on a novel ultrasonic transducer. Comprising an ultrasonic array module, a sound wave generation module and a power amplification module, the sound wave generation module can generate step sound waves in the forms of sine waves, triangular waves and square waves after being connected with a power source, the different sound waves are transmitted to the cross-shaped ultrasonic smoke abatement array located on the periphery of the smoke abatement pipeline after passing through the power amplification module, and the ultrasonic smoke abatement array is formed by orthogonally arranging four ultrasonic smoke abatement units. The ultrasonic array module directionally outputs sound waves to smoke in a pipeline to achieve the purpose of ultrasonic agglomeration and smoke abatement. The ultrasonic smoke abatement unit is composed of a flange cover, piezoelectric ceramics, an amplitude-change pole and a sawtooth-shaped vibration unit so as to achieve a better agglomeration effect. According to the device, smoke in the pipeline is agglomerated and settled in a novel ultrasonic array mode, the problem that the radial vibration effect of a transducer is not remarkable is solved, the overall smoke abatement effect is improved, reliability is high, and smoke abatement is rapid.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire protection and safety, and more specifically relates to an intelligent fire smoke elimination device which adopts an ultrasonic transducer array to aggregate and eliminate smoke, and a smoke elimination method of the device. Background Art

[0002] With the advancement of industrialization, the types of harmful gases contained in particulate matter emitted by factories have increased. Industrial production, especially the combustion process, produces a large amount of particulate matter, which is very harmful. The cyclone separators, electrostatic precipitators and bag filters that are widely used can achieve a very high total removal rate. The cyclone separator allows the gas containing dust to enter the separator along the tangential direction. Under the special flow channel design, the airflow rotates from top to bottom. During the rotation process, the dust is "thrown" to the periphery because its density is greater than that of the gas and the centrifugal force is greater. It is discharged from the dust outlet along the wall under the combined action of the downward airflow and gravity.

[0003] However, since the particle sizes of particulate matter emitted by factories are widely distributed, the efficiency of cyclone separators in removing dust and smoke with smaller particles is very low. Once harmful gases with smaller particles are discharged into the atmosphere, they will cause irreparable damage to the environment. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a cross-shaped ultrasonic agglomeration pipe smoke elimination array device based on a new ultrasonic transducer, which arranges a smoke elimination unit array inside the required smoke elimination pipe and agglomerates and eliminates smoke of different particle sizes in the pipe by outputting sound waves of continuously changing frequency.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model comprises an ultrasonic agglomeration module placed inside a pipeline, a power amplification module connected to the ultrasonic agglomeration module, and a sound wave generating module connected to the power amplification module; the ultrasonic agglomeration module comprises two pairs of ultrasonic transducer groups arranged in a cross shape, each pair of ultrasonic transducer groups consists of two ultrasonic transducers arranged oppositely, and each ultrasonic transducer is arranged radially along the pipeline.

[0007] A radially arranged cross-shaped support frame is fixed to the inner wall of the smoke duct, and two pairs of ultrasonic transducer groups are installed in the smoke duct through the cross-shaped support frame. Four ultrasonic transducers are respectively installed on the four support columns constituting the cross-shaped support frame.

[0008] Each ultrasonic transducer is composed of a cover, piezoelectric ceramics, a horn and a sawtooth vibration unit, which are coaxially arranged from top to bottom; the horn and the vibration unit are made of aluminum.

[0009] The four ultrasonic transducers are located in the same plane, the vibration units are all facing the center of the pipe, and the distance between the bottom of the four ultrasonic transducers and the center of the pipe is the same, which makes the superposition of sound waves more uniform and the smoke elimination effect better.

[0010] The ultrasonic transducer generates sound waves in both the longitudinal and radial directions.

[0011] The sound emission direction of the ultrasonic agglomeration module includes a direction perpendicular to the pipeline axis and a radial direction of each ultrasonic transducer.

[0012] The cylindrical vibration unit is circumferentially provided with annular saw teeth, and the vertex angle α of the saw teeth ranges from 60° to 100°.

[0013] The smoke duct material has an influence on the intensity of sound waves of less than 20% and meets the general requirements of ducts under normal circumstances.

[0014] The sound wave generating module generates different sound waves according to the set sound wave parameters, and transmits the different sound waves to the power amplifying module; the sound wave parameters include the period of the sound wave, the intensity of the sound wave, the waveform of the sound wave, etc.

[0015] The power amplifier module is used to receive the electrical signal from the sound wave generating module, amplify the received electrical signal and transmit it to the ultrasonic transducer.

[0016] The sound wave generating module is connected with the power supply and the power amplifying module through corrosion-resistant and high-temperature-resistant wires.

[0017] The power amplification module is connected to the signal generation module via a wire, and is connected to the four ultrasonic transducers via a data line.

[0018] Beneficial effects of the utility model:

[0019] The utility model improves the ultrasonic transducer, combines the improved new ultrasonic transducer with the smoke elimination array pipe, and solves the problem of low efficiency of traditional dust and smoke elimination by adding vibration sawtooth to the ultrasonic transducer and surrounding it in the form of an array inside the smoke elimination pipe. In addition, the ultrasonic transducer of the utility model has not only longitudinal vibration sound waves, but also radial vibration sound waves, which greatly increases the space for smoke elimination.

[0020] The utility model adopts a novel ultrasonic array to aggregate and settle the smoke in the pipe, which solves the problem that the radial vibration effect of the transducer is not significant, improves the overall smoke elimination effect, has strong reliability, and eliminates smoke quickly; the utility model is easy to use, highly economical, and highly versatile. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a general schematic diagram of the utility model device;

[0022] Figure 2 This is a schematic diagram of the smoke elimination function part of the device of the utility model;

[0023] Figure 3 This is a cross-sectional view of the smoke elimination function portion of the device of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the novel ultrasonic transducer in the device of the utility model.

[0025] Figure 5 It is a structural cross-sectional view of the novel ultrasonic transducer in the device of the utility model.

[0026] Figure 6 This is a simulation result diagram of the new ultrasonic transducer in the utility model device.

[0027] In the figure: ultrasonic agglomeration module (1), sound wave generating module (2), power amplification module (3), pipeline (4), novel ultrasonic transducer (5), cover (6), piezoelectric ceramic (7), amplitude transformer (8), sawtooth vibration unit (9), cross support frame (10), top angle (11) DETAILED DESCRIPTION

[0028] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, the smoke elimination device of the utility model comprises an ultrasonic array module 1, a sound wave generating module 2 and a power amplifier module 3. The sound wave generating module can generate step sound waves in the form of sine waves, triangle waves and square waves of 5-11kHz after being connected to a power source. Different sound waves are transmitted to the cross-shaped ultrasonic smoke elimination array located around the smoke elimination pipe after passing through the power amplifier module (sound wave frequency 20kHz). The ultrasonic smoke elimination array is mainly composed of four ultrasonic smoke elimination units arranged orthogonally. The ultrasonic array module outputs sound waves to the smoke in the pipe in a directional manner to achieve the purpose of ultrasonic agglomeration and smoke elimination.

[0030] like Figure 2 As shown, the smoke elimination part includes a smoke pipe 4, a novel ultrasonic transducer 5, and a cross-shaped support frame 10.

[0031] like Figure 2-3 As shown, the novel ultrasonic transducer 5 is used to receive the sound wave waveform and sound wave frequency processed by the power amplification module 3 and generate corresponding ultrasonic waves. The sound emission direction of the novel ultrasonic transducer 5 is not only perpendicular to the pipeline axis, but also along the radial direction of the ultrasonic agglomeration unit 1. The influence of the material of the smoke pipe 4 on the sound wave intensity must be less than 20% and meet the general requirements of the pipe under normal circumstances.

[0032] like Figure 3 As shown, the novel ultrasonic transducer 5 is installed inside a pipe wall with a certain thickness. The smoke pipe 4 is a right cylindrical hollow pipe with a horizontal axis, and the inner diameter of the pipe is less than 1m. The sound wave generating module 2 requires an external power supply. The bottoms of the four ultrasonic transducers 5 are at the same distance from the pipe axis and are in the same plane, which is perpendicular to the pipe axis, so that the sound waves are superimposed more evenly and the smoke elimination effect is better.

[0033] like Figure 4 As shown, the structure of the novel ultrasonic transducer is composed of a cover 6, a piezoelectric ceramic 7, a horn 8 and a sawtooth vibration unit 9, and the central axes of the above structures are all on the same straight line, and the cover 6 of the ultrasonic transducer is connected to the sound wave generating module through a high temperature resistant wire. The horn 8 and the sawtooth vibration unit 9 are made of aluminum material.

[0034] like Figure 5 As shown, the sawtooth vibration unit 9 is a cylindrical structure, and an annular sawtooth is arranged circumferentially on the outer surface, and the surface area of ​​the annular sawtooth accounts for 60%-80% of the surface area of ​​the whole cylinder. The optimal range of the vertex angle α of the annular sawtooth of the sawtooth vibration unit 9 is between 60° and 100°. By changing the vertex angle of the annular sawtooth, the smoke elimination efficiency of the smoke elimination device is optimized.

[0035] like Figure 5The figure shows a cross-sectional view of the structure of the new transducer in the utility model device, i.e., a cross-sectional view of the part that constitutes the ultrasonic agglomeration module 1. The cover 6 is composed of a standard cylindrical structure and a truncated cone structure, accounting for 10% of the volume of the entire new ultrasonic transducer. The bottom diameter of the cylindrical structure is 40mm and the height is 6mm. The upper bottom diameter of the truncated cone structure is 40mm, the lower bottom diameter is 50mm, and the height is 6mm. The piezoelectric ceramic 7 is a standard annular cylinder structure, accounting for 20% of the volume of the entire new ultrasonic transducer. The inner diameter of the annular cylinder structure is 17mm, the outer diameter is 50mm, and the height is 8mm. There are a total of six pieces, among which there will be a cylindrical air column with a bottom diameter of 17mm and a height of 48mm. The horn 8 is composed of three different cylindrical structures, accounting for 30% of the entire new ultrasonic transducer. The bottom diameter of the cylindrical structure close to the piezoelectric ceramic 7 is 52mm and the height is 30mm. The bottom diameter of the middle cylindrical structure is 64mm and the height is 3.5mm. The bottom diameter of the last cylindrical structure is 36mm and the height is 39mm. The three cylinders are chamfered. The sawtooth vibration unit 9 is composed of a cylinder and annular sawtooth, accounting for 40% of the volume of the new transducer. The bottom diameter of the cylindrical structure is 140mm and the height is 200mm. The width of each annular sawtooth is 40mm. The optimal angle range of the vertex angle 11 is between 60° and 100°.

[0036] Example 1

[0037] When smoke flows into the pipe 4, the power of the sound wave generating module 2 and the power amplifying module 3 is turned on. The sound wave generating module generates an electrical signal according to the set relevant sound wave parameters, including the period of the sound wave, the intensity of the sound wave, and the waveform of the sound wave, and transmits it to the power amplifying module 3 for reception through a wire; the power amplifying module 3 modifies part of the received electrical signal according to the set amplification factor parameter, and transmits it to the ultrasonic transducer 5 connected thereto through a wire again. The ultrasonic transducer 5 generates corresponding ultrasonic waves according to the transmitted electrical signal, and the annular serrations around the ultrasonic transducer 5 can increase the effective ultrasonic range of the ultrasonic transducer 5, and the array layout is adopted to ensure that the vibration of the pipeline in all directions can be better, so that the distribution of the sound waves is more uniform, so that there is no low cleaning efficiency in a certain part of the pipeline, which greatly improves the effect of sound wave agglomeration.

[0038] The main principle of acoustic agglomeration technology is the same-direction agglomeration mechanism: particles of different sizes are carried by the oscillating fluid medium to different degrees, which will cause them to move relative to each other, collide, agglomerate and fuse, thereby reducing the emission of harmful gases with smaller particle sizes into the atmosphere.

[0039] Example 2

[0040] After the smoke flows into the pipe 4, if the smoke flows around the ultrasonic transducer 5 without annular serrations, only the longitudinal sound waves of the ultrasonic transducer 5 are generated, and the sound pressure level around the radial direction is close to zero, the smoke cannot be processed, and the removal efficiency is reduced. When the smoke flows around the ultrasonic transducer 5 with annular serrations, the longitudinal and radial sound pressure levels are not zero, and sound waves are generated, which greatly improves the smoke elimination effect and efficiency.

[0041] At the same time, the sound pressure level of the radial vibration of a single novel transducer 5 is obtained by computer simulation as follows: Figure 6 As shown in the results, it can be seen that the radial vibration of the new ultrasonic transducer has a more obvious sound pressure level.

Claims

1. A cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a new ultrasonic transducer, characterized in that: The invention comprises an ultrasonic agglomeration module (1) disposed inside a pipeline (4), a power amplification module (3) connected to the ultrasonic agglomeration module (1), and a sound wave generating module (2) connected to the power amplification module (3); the ultrasonic agglomeration module (1) comprises two pairs of ultrasonic transducer (5) groups arranged in a cross shape, each pair of ultrasonic transducer (5) groups comprises two ultrasonic transducers (5) arranged opposite to each other, and each ultrasonic transducer (5) is arranged radially along the pipeline; Each ultrasonic transducer (5) is composed of a cap (6), a piezoelectric ceramic (7), a horn (8) and a sawtooth vibration unit (9); the cap (6), the piezoelectric ceramic (7), the horn (8) and the sawtooth vibration unit (9) are coaxially arranged from top to bottom; the horn (8) and the vibration unit (9) are made of aluminum.

2. According to claim 1, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a new ultrasonic transducer is characterized in that: the smoke A radially arranged cross-shaped support frame (10) is fixed to the inner wall of the pipe (4); two pairs of ultrasonic transducer (5) groups are installed in the smoke pipe (4) via the cross-shaped support frame (10); and four ultrasonic transducers (5) are respectively installed on four support columns constituting the cross-shaped support frame (10).

3. According to claim 1, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a novel ultrasonic transducer is characterized in that: The four ultrasonic transducers (5) are located in the same plane, the vibration units (9) are all facing the center of the pipeline, and the distance between the bottom of the four ultrasonic transducers (5) and the center of the pipeline is the same.

4. According to claim 3, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a novel ultrasonic transducer is characterized in that: The ultrasonic transducer (5) generates sound waves in both the longitudinal and radial directions; The sound emission direction of the ultrasonic agglomeration module (1) includes a direction perpendicular to the pipeline axis and a radial direction of each ultrasonic transducer (5).

5. According to claim 1, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a novel ultrasonic transducer is characterized by: The cylindrical vibration unit (9) is provided with annular saw teeth in the circumferential direction, and the vertex angle (11) of the saw teeth has an angle α in the range of 60°-100°.

6. According to claim 1, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a novel ultrasonic transducer is characterized by: The sound wave generating module (2) generates different sound waves according to set sound wave parameters, and transmits the different sound waves to the power amplifying module (3); the sound wave parameters include the period of the sound wave, the intensity of the sound wave, and the waveform of the sound wave.

7. According to claim 1, a cross-shaped ultrasonic agglomeration pipeline smoke elimination array device based on a novel ultrasonic transducer is characterized by: The power amplification module (3) is used to receive the electrical signal from the sound wave generating module (2), amplify the received electrical signal and transmit it to the ultrasonic transducer (5).

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