Investigation Of Smoke Characteristics Of Cable Fire And Experimental Study On Smoke Elimination By Acoustic Agglomeration

Cable smoke is very difficult for firefighters to search and rescue due to its strong shading and toxicity.At present,there is no effective means to control cable fire smoke.This article innovatively proposes the idea of using sonic agglomeration technology to eliminate cable fire smoke.The sonic agglomeration technology is a fast and effective aerosol processing technology.Through the application of a sound field,the particles collide and reunite due to relative movement.Reduce the number of particles concentration.Existing literature shows that when this technology is applied to fire smoke,its extinction coefficient can be rapidly weakened and the visibility of the fire field can be increased.In view of this,this paper uses the acoustic wave agglomeration technology as the basis to explore the characteristics of using the acoustic wave agglomeration technology to eliminate the fire smoke of the cable.Helping firefighters in search and rescue efforts.This article first conducts combustion tests on common cables,explores the characteristics of cable fire smoke generation under different boundary conditions,and obtains its solid-phase and gas-phase data sets.During the burning of the cable,a large amount of white smoke will be produced,accompanied by a pungent acid odor;The smoke production rate of the YJV cable is higher than that of the YJV cable as a whole,and its light transmittance decline trend is obviously greater than that of the YJV cable.The smoke production experiment of each layer of the cable is carried out.The outer sheath layer of the cable produces the most smoke,followed by the insulating layer,and the white filler produces the least smoke.Therefore,during the cable production process,you should pay close attention to the external Sheath and insulation material In the process of cable production,pay close attention to the material of the outer sheath and insulation layer of the cable;the smoke generation performance of the cable when burning vertically and horizontally differs greatly,and the smoke generated when placed horizontally is significantly greater than that when placed vertically;the laying method of the cable affects the combustion The influence of smoke is greater,and the amount of smoke generated when the cables are arranged at intervals is more when they are arranged closely.Then this article tried to use sonic agglomeration technology to eliminate cable fire smoke.The results show that the sonic agglomeration technology has a significant effect on the elimination of cable fire smoke.The frequency of use is 1.5k Hz and the sound wave with a sound power of 12 W has an initial light transmittance of about After 0.1 fire smoke was eliminated,its light transmittance increased to around 0.6 after about 15 s,and its light transmittance was close to 1after about 2 minutes,and most of the smoke particles have been eliminated.For cable fire smoke,the frequency of 1.5 k Hz is appropriate,higher or lower than this frequency will quickly reduce the reunion effect,and can show that the control mechanism is the same direction reunion.The higher the sound wave power,the higher the reunion efficiency,and the faster the smoke elimination process.However,when the sound power increases to a certain range,the sound power has a very limited effect on improving the reunion effect,so choosing a reasonable sound power can reduce energy consumption.Improve economic efficiency.In addition,the higher the initial concentration,the better the elimination effect in the early stage,but in the later stage of the agglomeration,the initial concentration has a smaller effect on the agglomeration effect.Finally,this paper uses the newly developed aerodynamic sound source to eliminate the cable fire smoke in the large space reunion room.The electric horn has poor effect on the cable smoke elimination in the large reunion room and the flowing space.