CN2234041Y - Low frequency sound wave ash blower - Google Patents

Abstract

The utility model relates to a low frequency sound wave ash blower which is mainly used for the ash blowing of the heat exchanger of an industrial boiler, comprising a circular-pipe shape rotor, the drive device of the rotor and a circular pipe shape stator which is positioned on the outer circle of the rotor. The rotor and the stator have a same circular center. The upper parts of the stator and the stator which are adopted are respectively provided with a through hole. Ash blowing gas passes through the through hole of the stator and the through hole of the rotor, and is discharged from a gas outlet on the rotor by utilizing the variation of the turning position of the rotor. With adopting the circular pipe shape stator structure and the circular pipe shape rotor structure, the utility model is suitable for working under the situation of high temperature and high pressure. The utility model can obtain larger sound power and conversion efficiency in lower sound wave frequency range because the opening hole area and the hole shape of the rotor and the stator are easily enlarged and regulated.

Description

Low frequency acoustic wave soot blower

The utility model belongs to mechanical field, particularly is applicable to the soot blower of large scale industry boiler heat-exchanger.

The technology of utilizing acoustic method to improve methods removing boiler heat-exchanger flue gas dust stratifications such as strength and steam power at present has multinomial, what have reaches industrial preferably effect, the proof acoustic method is feasible, and one of major technique key of application is the sound field that will form strong sound level in whole heat exchanger space.In order to reduce the decay of sound wave, need to adopt the less low frequency sound wave of acoustic attenuation coefficient in whole heat exchanger space.But acoustical power that low-frequency sound wave takes place and efficient are difficult to the higher level of maintenance again.Technology of using such as Chinese patent " resonant acoustic dedusting apparatus " and " infrasound and low-frequency sound generator " all are to utilize to modulate to decide plate and transfer keep plate now, and area size, shape and the position of periodic variation nozzle inlet reach and produce the sound wave of various frequencies and waveform.Utilize above method shortcoming to be, efficient is not high enough, all can not take into account the requirement of low frequency, high-power and high efficiency three aspects, influences practical function.

The purpose of this utility model is to overcome above-mentioned shortcoming, provides a kind of and has more high-power, greater efficiency and the acoustic wave ash ejector of the lower solution three contradiction of frequency.

The technical solution adopted in the utility model is, includes the rotor of a tubular, the rotor supports drive unit, one tubular rotor cylindrical and with the stator of the concentric tubular of rotor, and the inlet chamber that forms with the tubular stator.Seal isolation between rotor and the stator faces.On the tube wall of tubular rotor and tubular stator, respectively have through hole.When motor drives pipe rotor rotation, the perforate of rotor and the perforate of stator, the time and overlap and be connected state, the time and misplace and be closed condition.During connection, gas is pressed the end ejection of people by the pipe rotor by the stator exocoel.When closing, gas can not flow.The interrupted ejection of gas promptly forms the air-borne sound compressional wave.

The frequency of emission sound wave is by the rotating speed and the hole count decision of rotor.For example hole count is 1, and motor speed is changeed by per minute 600, and then the frequency of sound wave of Chan Shenging is 10 hertz.If the drive unit speed-regulating type then is easy to obtain several hertz to tens hertz sound wave of Frequency Adjustable, is low frequency audible sound wave and blows sound wave.The acoustical power of low-frequency sound wave depends primarily on the circulation area of air-flow, be the size in hole, because the hole on cylindrical rotor and the tubular stator barrel can expand to slot aspect axially, its circulation area can be done greatlyyer, thereby obtains bigger acoustical power.If the hole shape of slot is adopted in the hole on rotor and the stator barrel, have switching characteristic and bigger adjusting range preferably in addition, be convenient to obtain higher sound conversion efficiency.The technical solution of the utility model has solved the contradiction of disk rotor and stator cann't be solved in the prior art frequency, power and efficient with columnar rotor and stator.Thereby formed low frequency acoustic wave soot blower more high-power, greater efficiency.

Fig. 1 is a structural representation of the present utility model.

Further specify principle of the present utility model and enforcement below in conjunction with accompanying drawing.

The utility model comprises tubular rotor 1, has through hole 8 on its barrel, and two ends of rotor can adopt bearings, and the one end is connected with drive unit 11 by hitch bar 10.The other end of tubular rotor is the mouth of pipe of giving vent to anger.Outside tubular rotor 1, be with coaxial tubular stator 2, ring-shaped sealing sleeve 5 is equipped with in the both sides of through hole between rotor 1 and stator 2.Have through hole 9 on stator 2 barrels, for obtaining effect through hole 8 and through hole 9 employing slots preferably.Stator 2 forms annular cavity with urceolus 3, and links by air inlet pipe 4 and source of the gas, adopts sealing shroud 7 seal isolation between the end face of rotor 1 and stator 2.

Its course of work is that source of the gas enters the inlet chamber of being made up of urceolus 3 and tubular stator 2 from air inlet pipe 4.Have shape, big or small corresponding through hole 8 and 9 on the rotor 1 of tubular and the stator 2, if hole 8 and hole 9 overlap, then the gas in the inlet chamber sprays in via hole 9 and hole 8 enter into the tube of rotor 1 and by escape pipe 6, if hole 8 and hole 9 dislocation, then the gas in the inlet chamber is blocked, and escape pipe 6 does not have the gas ejection.Promptly formed the interrupted compressional wave sonic generator of gas, be used for sound and blow ash.Drive unit adopts motor, and the frequency of sound wave is by the rotating speed decision of motor, and the gentle sound of the power of sound wave conversion efficiency is by decisions such as the circulation area of perforate, hole shapes.This practical flow area can be increased by the axial length of elongated hole, and rectangular hole shape can have bigger gas sound conversion efficiency.Thereby freed the restriction between the three, formation has more high-power, greater efficiency, and the acoustic wave ash ejector of lower frequency.

Adopt the utility model, the area of rotor and stator perforate and hole shape can be enlarged and adjust very easily, can still keep bigger acoustical power and conversion efficiency in lower frequency of sound wave scope, take into account three aspect indexs, solve practical required.

Rotor and the stator structure of the utility model because adopting is so there is the not yielding height that is applicable to The advantage of wet body.

The utility model can under the condition of relatively high power and greater efficiency, produce than low frequency The sound wave of rate. Be suitable for having good practical value as sonic soot blowing.

Claims (2)

1, a kind of low frequency acoustic wave soot blower comprises the rotor, stator and the rotor drive that have the hole, it is characterized in that rotor is a round tube shape, at the cylindrical of tubular rotor the tubular stator concentric with rotor is housed, and constitutes inlet chamber between stator and the rotor cylindrical; On stator and rotor wall, have shape, big or small corresponding through hole, the outer wall air inlet pipe hole of stator, an end of round rotor is connected with drive unit, and the other end is the mouth of pipe of giving vent to anger, and the end face of stator and rotor adopts sealing shroud to isolate.

2, soot blower according to claim 1 is characterized in that the hole of opening on stator inner wall and the rotor wall is a rectangle.