Research And Design Of Acoustic Soot Removal System For Cam Boiler

During the operation of the coal-fired boiler,slagging and slagging will occur in the inner heat exchange surface.On the one hand,fouling and slagging will affect the heat exchange efficiency of the boiler heat exchange surface,on the other hand,it will cause the blockage of the internal flue of the coal-fired boiler,thus affecting the safe operation of the boiler.Eliminating the ash and slagging in the heat exchanging area of the coal-fired boiler can raise the production efficiency of coal-fired boilers,reduce pollution emissions and reduce production accidents.The common coal-fired boiler ash removal technology with shaking type,steam,shock pulse and acoustic wave,the sound wave ash remover because of its advantages such as ash ash and wide area,low energy consumption,low equipment investment,no harm to human body is widely used in large power plant.Aiming at the problems existing in the practical application of the rotary flute type sonic soot remover in the project of cooperation with Beijing De Jong Hengtong Environmental Technology Co.,Ltd.In this project,a new type of boiler wheel type acoustic wave ash removal system has been developed,which has the advantages of simple structure,low cost,integration and intelligence.It can make up for the shortcomings of the existing acoustic soot cleaner system.The main contents of this paper are as follows:Firstly,the causes of heat transfer area,ash and slagging in different positions of coal fired boiler and their forces were analyzed.This paper expounds the principle of acoustic wave produced by acoustic wave dust remover,and analyzes the characteristics of different frequency acoustic wave dedustingThen,the basic principle of air source modulation is analyzed and discussed briefly.The mathematical model of air source modulation is established.Based on the mathematical model of air flow source,the throat structure of cam type sonic soot remover is designed.The throat cutting structure and cam structure were simulated by using MATLAB and ANSYS software,and the change of throat area was analyzed.On the basis of the throat structure,the structure of index horn tube,cylinder and connecting piece is designed,and the whole structure design of the cam type sonic soot remover is completed.Then,the characteristics of FLUENT software and its simulation process are briefly described.The performance of different exponential curve loudspeakers is simulated by using FLUENT software.A simulation model of a convex type acoustic wave ash separator is established,and the mesh generation is performed by dynamic mesh method.The air source state of a cam type sonic soot remover is simulated under different operating frequencies and pressures.Finally,The controller of cam type acoustic soot removal system is studied and designed.The STM32F4 controller is used and the man-machine interface design of the controller is realized by using STemwin.According to the electrical design principle,choose the appropriate hardware module,design a safe,reliable and intelligent dust removal system controller.