CN211936200U

CN211936200U - System for preventing dust explosion in workshop by utilizing sound wave agglomeration

Info

Publication number: CN211936200U
Application number: CN202020445985.XU
Authority: CN
Inventors: 黄长江; 刘菊芳; 郑建威; 黄超
Original assignee: Hangzhou Xinji Energy Technology Co ltd
Current assignee: Hangzhou Xinji Energy Technology Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-17
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses an utilize sound wave reunion to prevent dust explosion's in workshop system relates to dust disposal equipment. Comprises a sound source system and a spraying system; the sound source system comprises a compressed air storage tank and a sound source device which are connected through a gas pipeline; the spraying system comprises an agglomeration agent storage tank, a delivery pump and an atomizing nozzle which are connected through an atomizing pipeline; the sound source device and the atomizing nozzles are a plurality of in number and are uniformly distributed indoors. The utility model discloses a sound wave reunion adds the method of spraying and reduces dust concentration and reach the purpose of prevention dust explosion after making the dust granule reunion.

Description

System for preventing dust explosion in workshop by utilizing sound wave agglomeration

Technical Field

The utility model relates to an indoor dust disposal equipment especially relates to an utilize sound wave to reunite the system that prevents dust explosion in the workshop.

Background

The dust explosion refers to the dust cloud formed by mixing combustible dust with air in a limited space, and under the action of an ignition source, the formed dust-air mixture is rapidly combusted, and a chemical reaction of which the temperature and the pressure are suddenly increased is caused.

Dust explosion is often accompanied with production and processing places where aluminum powder, zinc powder, aluminum material processing grinding powder, various plastic powders, intermediates of organic synthetic drugs, wheat flour, sugar, wood chips, dyes, glue wood ash, milk powder, tea powder, tobacco powder, coal dust, plant fiber dust and the like are generated. Similar to combustible gas, dust explosion also has a certain concentration range, and dust can easily explode after reaching a certain concentration, so that the concentration of the dust is controlled by one of the methods for effectively preventing the dust explosion. At present, no method for eliminating dust in the early stage well aiming at dust explosion so as to reduce the occurrence of dust explosion accidents exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an utilize the sound wave to reunite the system that prevents the interior dust explosion of workshop, the motion of dust makes its reunion become the large granule and subsides and reduce dust concentration's purpose with higher speed.

In order to achieve the above object, the utility model provides a following technical scheme:

a system for preventing dust explosion in a workshop by utilizing sound wave agglomeration is characterized by comprising a sound source system and a spraying system; the sound source system comprises a compressed air storage tank and a sound source device which are connected through a gas pipeline; the spraying system comprises an agglomeration agent storage tank, a delivery pump and an atomizing nozzle which are connected through an atomizing pipeline; the sound source device and the atomizing nozzles are a plurality of in number and are uniformly distributed indoors.

Furthermore, the sound source device comprises a horn cover, and a nozzle, a central connecting rod and a resonance cavity which are arranged in the horn cover; the nozzle is arranged at the center of the horn cover, the first end of the nozzle is positioned outside the horn cover, and the second end of the nozzle is positioned in the horn cover; the first end of the central connecting rod extends into the nozzle, and the middle part of the central connecting rod is provided with a convex part which forms a slit with the nozzle; the resonance cavity is mounted at the second end of the center link.

Furthermore, the first end of the central connecting rod is provided with a mounting table, and a plurality of through air holes are formed in the mounting table.

Further, the nozzle is connected with the mounting table through threads, and comprises internal threads of the nozzle and external threads on the peripheral side of the mounting table.

Furthermore, the upper surface of convex part is provided with the first inclined plane that encircles central connecting rod, the inner wall of nozzle is provided with the second inclined plane, first inclined plane, second inclined plane are the same angle with the horizontal direction respectively.

Further, the same angle is 30 ° to 60 °.

Further, an extension portion facing the resonance chamber is provided on the opening side of the nozzle.

Further, still include dust monitored control system, including evenly laying a plurality of dust concentration sensor indoor, dust concentration sensor connects on the controller.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an at indoor evenly arranged sound source device, utilize the high-strength sound wave that sound source device sent, handle indoor fine particle (aerosol), make and take place relative displacement between its granule, with higher speed fine particle's rate of motion makes fine particle bump, agglomerates into great granule and subsides. Meanwhile, spraying devices are uniformly arranged and adopt ultrasonic atomization, and ultrafine dry mist with the particle size of 1-100 mu m can be generated; the superfine dry mist particles are fine and dense, the contact area between the superfine dry mist particles and the dust particles is fully increased, the water mist particles and the dust particles collide and agglomerate under the action of high-strength sound waves to form agglomerates, the agglomerates continuously grow and become heavy until the agglomerates are naturally settled, and the purpose of reducing the dust concentration to prevent dust explosion is achieved.

Drawings

Fig. 1 is a system structure diagram according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a sound source device according to an embodiment of the present invention.

Fig. 3 is a partial view of the connection between the nozzle and the center link according to an embodiment of the present invention.

Fig. 4 is a schematic view of a central link structure according to an embodiment of the present invention.

In the figure: 61. a gas pipeline; 62. a compressed air storage tank; 63. a sound source device; 64. an air compressor; 71. an atomization conduit; 72. an agglomeration agent storage tank; 73. a delivery pump; 74. an atomizing nozzle; 81. a dust concentration sensor; 82. a controller; 2. a horn cover; 3. a nozzle; 31. a second inclined plane; 32. an extension portion; 4. a central link; 41. a convex portion; 411. a first inclined plane; 42. an installation table; 421. a vent hole; 5. a resonance chamber; 9. a slit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a system for preventing dust explosion in a workshop by using sound wave agglomeration, which includes a sound source system and a spraying system. The sound source system comprises a compressed air storage tank 62 and a sound source device 63 which are connected through a gas pipeline 61; the sound source devices 63 are uniformly distributed indoors, the air transmission pipeline 61 is provided with electromagnetic valves for controlling the circulation of compressed air, and the compressed air is converted into sound with the sound generation frequency of 0-10kHz, low frequency and the sound pressure level of about 150 decibels through the sound source devices 63, so that fine dust particles in the air are agglomerated and settled. It is worth mentioning that an air compressor 64 is connected to the compressed air storage tank 62 in order to supplement the compressed air storage tank 62 with compressed air.

To further enhance the dust removal effect, a spray system is also included. The spraying system comprises an agglomeration agent storage tank 72, a delivery pump 73 and an atomizing nozzle 74 which are connected through an atomizing pipe 71; the atomizing nozzles 74 are distributed in a plurality of numbers and are uniformly distributed in the room. The agglomeration agent is atomized and sprayed indoors, so that the agglomeration effect of dust is further enhanced.

In this embodiment, a dust monitoring system is further included to monitor the indoor dust in real time for feedback. Dust monitored control system is including evenly laying a plurality of dust concentration sensor 81 indoor, dust concentration sensor connects on controller 82, and the indoor dust concentration of real-time supervision feeds back to the user for control sound source system and spraying system stop.

In particular, in order to achieve the generation of such high intensity sound waves. Referring to fig. 2, the sound source device 30 includes a horn housing 2, and a nozzle 3, a center link 4, and a resonance chamber 5 installed in the horn housing 2. Nozzle 3 sets up in the central point of loudspeaker cover 2 and puts, and the first end of nozzle 3 is located loudspeaker cover 2 and links to each other with gas transmission pipeline outward, and is leading-in with external compressed air, and the second end of nozzle 3 is located loudspeaker cover 2. The opening of the nozzle 3 is disposed toward the opening of the bell housing 2 for ejecting the compressed air flow outward.

Referring to fig. 2 and 3, a first end of the central link 4 extends into the nozzle, a protrusion 41 is disposed in the middle of the central link 4, and the protrusion 41 and the nozzle 3 form a slit 9 with a width of 0.05-5 mm; the narrow slit 9 is annular, so that the total pressure distribution of the airflow at the outlet of the nozzle 3 can be changed, and the total pressure near the axis of the central connecting rod 4 is effectively reduced, thereby being more beneficial to the discharge of the gas in the pipe in the outflow stage.

The resonance cavity 5 is a cylinder with one closed end and the other open end and is used for generating high-frequency vibration in a gas flow field, and the resonance cavity 5 is arranged at the second end of the central connecting rod 4. The opening side of the resonance chamber 5 faces the nozzle 3.

Referring to fig. 3 and 4, in order to fix the center link 4, a mounting table 42 is disposed at a first end of the center link 4, and a plurality of ventilation holes 421 penetrating up and down are formed in the mounting table 42. The vent holes 421 are fan-shaped and evenly distributed on the mounting table 42, so that compressed air enters the slits 9 below through the vent holes 421; the nozzle 3 is connected with the mounting table 42 through threads, and comprises an internal thread of the nozzle 3 and an external thread on the peripheral side of the mounting table 4.

The width of the slit 9 directly affects the pressure distribution at the outlet of the nozzle 3 in order to achieve adjustability of the slit 9. The upper surface of the convex part 41 is provided with a first inclined surface 411 surrounding the central connecting rod 4, the inner wall of the nozzle 3 is provided with a second inclined surface 31, and the first inclined surface 411 and the second inclined surface 31 respectively form the same angle of 30-60 degrees, preferably 60 degrees with the horizontal direction; a slit 9 is formed between the first inclined surface 411 and the second inclined surface 31. The height adjustment of the center link 4 can be realized by rotating the center link 4, so that the approaching or separating between the first inclined surface 411 and the second inclined surface 31 is adjusted, and the width of the slit 9 is adjusted.

In order to guide the air flow, an extension 32 facing the resonance chamber is provided on the opening side of the nozzle 3 to guide the high-speed air flow emitted from the slit 9 and to intensively inject the high-speed air flow into the resonance chamber 5.

In order to make those skilled in the art better understand the technical solution of the sound source device, the following detailed description is made in conjunction with the specific principles of the present embodiment.

The open end of the resonance cavity 5 is opposite to the direction of the air flow and is placed in a high-speed air flow, high-frequency vibration is generated in the air flow and is transmitted outwards, and high-strength sound waves (more than 150 decibels) with high sound pressure level are generated through the guiding and sound amplification of the horn cover 2.

The compressed air enters the nozzle 3 and then forms a supersonic air flow after passing through the narrow gap 9 between the nozzle 3 and the central link 4. When the air flow passes through the resonance chamber 5, the air flow can be divided into an inflow phase and an outflow phase.

During the inflow phase, the air flow generates a series of compression waves which propagate into the resonance cavity 5, and the compression waves are rebounded out from the bottom of the resonance cavity 5 and propagate towards the pipe orifice.

The rebound compression wave (or shock wave) generates an expansion wave when reaching the orifice of the resonance chamber 5, and at this time, the air pressure at the orifice of the resonance chamber 5 is high due to the low air pressure in the resonance chamber 5, and the expansion wave propagates into the resonance chamber. This is accompanied by a transition from the inflow phase to the outflow phase.

The propagation of the expansion waves to the resonance cavity 5 improves the pressure of the air flow in the resonance cavity 5, and the pressure of the air flow at the pipe orifice of the resonance cavity 5 is reduced, so that the interface between the air flow jetted by the nozzle 3 and the air flow in the resonance cavity slowly moves towards the pipe orifice of the resonance cavity 5, and the air flow flows out in the process.

When the expansion wave rebounds at the bottom of the resonance cavity pipe 5 and reaches the pipe orifice, the pressure of the gas in the resonance cavity pipe 5 is weakened, the pipe orifice pressure of the resonance cavity pipe 5 is high, the airflow moves into the resonance cavity pipe 5 again, the outflow stage is finished, the inflow stage is started, and a cycle process is finished.

The high-speed airflow repeatedly enters and exits the resonance cavity to generate pressure fluctuation, and the pressure fluctuation generates high-strength sound waves (more than 150 decibels) with high sound pressure level through the guiding and sound amplifying effects of the horn cover 2, namely sound.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A system for preventing dust explosion in a workshop by utilizing sound wave agglomeration is characterized by comprising a sound source system and a spraying system; the sound source system comprises a compressed air storage tank and a sound source device which are connected through a gas pipeline; the spraying system comprises an agglomeration agent storage tank, a delivery pump and an atomizing nozzle which are connected through an atomizing pipeline; the sound source device and the atomizing nozzles are a plurality of in number and are uniformly distributed indoors.

2. The system for preventing dust explosion in a workshop by using sound wave agglomeration according to claim 1, wherein the sound source device comprises a horn housing, and a nozzle, a central connecting rod and a resonance cavity which are arranged in the horn housing; the nozzle is arranged at the center of the horn cover, the first end of the nozzle is positioned outside the horn cover, and the second end of the nozzle is positioned in the horn cover; the first end of the central connecting rod extends into the nozzle, and the middle part of the central connecting rod is provided with a convex part which forms a slit with the nozzle; the resonance cavity is mounted at the second end of the center link.

3. The system for preventing dust explosion in a workshop by utilizing sound wave agglomeration according to claim 2, wherein a mounting table is arranged at the first end of the central connecting rod, and a plurality of vent holes penetrating up and down are formed in the mounting table.

4. The system for preventing dust explosion in a workshop using sound wave agglomeration according to claim 2, wherein the nozzle is screw-coupled to the mount table, and includes an internal thread of the nozzle and an external thread on a peripheral side of the mount table.

5. The system for preventing dust explosion in a workshop using sound wave agglomeration according to claim 2, wherein the upper surface of the convex part is provided with a first inclined surface surrounding the central link, and the inner wall of the nozzle is provided with a second inclined surface, and the first inclined surface and the second inclined surface are respectively at the same angle with the horizontal direction.

6. The system for preventing dust explosion in a plant using sound wave agglomeration according to claim 5, wherein the same angle is 30 ° to 60 °.

7. The system for preventing dust explosion in a plant using sound wave agglomeration according to claim 2, wherein the open side of the nozzle is provided with an extension toward the resonance chamber.

8. The system for preventing dust explosion in a workshop by utilizing sound wave agglomeration according to claim 1, further comprising a dust monitoring system, wherein the dust monitoring system comprises a plurality of dust concentration sensors which are uniformly distributed in a room, and the dust concentration sensors are connected to the controller.