CN2267393Y

CN2267393Y - Spiral-flow type high efficiency sound wave device for blowing out dust or soot

Info

Publication number: CN2267393Y
Application number: CN 96215332
Authority: CN
Inventors: 李新民; 刘瑞昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-05
Filing date: 1996-07-05
Publication date: 1997-11-12
Anticipated expiration: 2006-07-05

Abstract

The utility model belongs to a strong acoustic wave soot blower in the field of applied acoustics, which is mainly composed of a rotational flow cap, a rotational flow chamber, a flow guide cone, an outer sleeve, a voltage and flow stabilizing chamber, a locking outer sleeve pipe, and a contracting spray port. The utility model utilizes compressed air as the power source. Supersonic air flows sprayed from the spray port form shock wave faces between the spray port and the rotational flow chamber, and acoustic waves with high acoustic intensity are generated through motivation, so that soot deposits on the surfaces of heat exchanging pipes are removed, and the heat exchanging pipes are kept clean. The utility model has the advantages of high soot removing effect, energy saving, etc. and that the cracking of heat exchanging pipes can be avoided, and the service lives of boilers can be extended.

Description

Spiral-flow type efficient acoustic wave soot blower

The utility model is a kind of strong sound wave soot blower that belongs in the applied acoustics field.

Acoustic wave ash ejector is the boiler soot-blowing new technology that China just grows up the nineties, and it can be divided into the audio frequency strong sound wave soot blower of installing in outer infrasound soot blower of installing of stove and the stove.What install and use in the stove mainly is spray formula resonant cavity acoustical generator, and its primary structure is by the high speed spout, and reflection cavity and resonant cavity are formed.The supersonic airstream that the high speed spout penetrates has the eigenfrequency of itself, resonates the generation strong sound wave when the eigenfrequency of the frequency of jet and resonant cavity is consistent.The undulating pressure of high sound intensity sound wave constantly purges the heat exchanger tube surface in the air-flow, and the heat exchanger tube surface is kept clean forever, reaches to blow grey dedusting purpose.The kind of acoustic wave ash ejector is a lot, and structure and sounding principle have nothing in common with each other, and general steel ball ash disposal and high-pressure hydraulic ash disposal have that efficiency of dust collection is low, cost is high.The more important thing is the loss that it brings to boiler plant under the bump of steel ball, and the steam temperature difference makes heat exchanger tube cause be full of cracks easily.

The purpose of this utility model is to propose a kind of eddy flow cap, spin chamber, deflection cone of including, overcoat, the spiral-flow type efficient acoustic wave soot blower that voltage stabilization and current stabilization chamber locking extension tube attached and contracting nozzle are constituted, it is sound intensity height not only, good dedusting effect, simple in structure, cheap, and be convenient to processing, the precision height, good stability has wider frequency harmony power bracket, thereby has solved the existing in prior technology problem.

The technical scheme that the utility model adopted is that it has utilized the most frequently used mouth flute sounding principle among the people, through technical finesse and repeatedly experiment, makes the high sound intensity sonic generator that is fit to commercial Application.It is mainly by the eddy flow cap, deflection cone, spin chamber, and the voltage stabilization and current stabilization chamber, locking extension tube attached and contracting nozzle are formed.The Ge Erdeng whistle that has replaced industrial application for a long time, Hartmann oscillator and the improved on this basis connecting rod spray whistle.

Design feature of the present utility model is to be in the same place by the upper end weldering end of eddy flow cap and deflection cone with the sounding principle, constitute the spin chamber, gap between deflection cone and the overcoat forms contracting nozzle, overcoat and locking extension tube attached are with being threaded and deflection cone being locked on the coat, entering the mouth to the constriction of deflection cone of locking extension tube attached constitutes the voltage stabilization and current stabilization chamber.

In the voltage stabilization and current stabilization chamber with the 2-5 kilograms per centimeter ²Accelerate to critical sound velocity by the contracting nozzle step-down, in outlet moment because the increment rate of speed greater than the reduction rate of density, so annular slice air-flow supersonic speed sprays into the spin chamber, along with the increased pressure in the spin chamber, supersonic airstream forms the shock wave front outside spout, gas medium density, pressure and temperature around making increase suddenly, produce the high sound intensity sound wave; When Compressed Gas does not reach critical speed at contracting nozzle, the sheet air-flow still sprays into the spin chamber with subcritical flow, when pressure is increased to when being enough to overcome the internal stress of sheet air-flow, can change the direction of sheet air-flow, spray outside the spin chamber, the gas medium around the compression produces sound wave.Intensity of acoustic wave is near field measurement more than 160 decibels, and from 600 to 8000 hertz of frequencies, acoustical power be from 150 watts to 2000 watts, can both operate as normal in the scope of operating pressure 2-6 kilogram, and working stability, efficiency of dust collection height, be adapted at installing and using on the various type of furnaces.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 gives installation site figure in the hot device for the utility model at boiler.

Further specify embodiment of the present utility model now in conjunction with the accompanying drawings.

The utility model is mainly by eddy flow cap 1, spin chamber 2, and deflection cone 3, overcoat 4, voltage stabilization and current stabilization chamber 5, locking extension tube attached 6 and contracting nozzle 7 are formed, as shown in Figure 1.Wherein each part all adopts the stainless steel of heat-resistant antifriction to process, and its oxidation resistance temperature is more than 750 ℃, and hardness number HRC is more than 40.Adopt the way of welding to fix between eddy flow cap 1 and the deflection cone 3, indeformable in order to weld, assembled portion adopts interference fit, welds after being pressed into; In order to guarantee one of the spout 7 circumferential clearances concentricity of making peace, the one-level interference fits of closed tolerance is adopted in the assembling between deflection cone 3 and the overcoat 4, and it is locked with it with the locking extension tube attached to be pressed into the back; Because between overcoat 4 and the locking extension tube attached 6 is to be threaded, for preventing that vibrating the loose method of spot welding of using after the peace cooperation is suitable welds overcoat 4 and locking extension tube attached 6 dead.The end that is connected locking extension tube attached 6 for ease of soot blower and outer pipeline is provided with gas thread made in Great Britain, wherein the cutting edge inclination alpha of eddy flow cap 1 is 30-60 ° of scope, the angle of throat θ of deflection cone 3 is 15-30 ° of scope, the lower end has 6-8 circular hole evenly to distribute around axis, the aperture is in φ 4-φ 30 scopes, the inner diameter d of eddy flow cap 1 (being the outer wall of spin chamber 2) is at the 20-90 millimeter, each interior angle radius R of spin chamber 2 is at the 6-30 millimeter, the inner diameter φ 1 of spin chamber 2 is at the 8-30 millimeter, the inner diameter φ 2 of contracting nozzle 7 is at the 19-88 millimeter, the width H of spout 7 is at the 0.4-2 millimeter, the length L of eddy flow cap 1 ₁At the 15-140 millimeter, the distance L between eddy flow cap 1 and the spout 7 ₂At the 8-28 millimeter, spout 7 direct current segment length L ₃At the 6-16 millimeter.Concentricity and the squareness tolerance of all parts in process requires to be not more than 0.03 millimeter, and the connecting thread of extension tube attached 6 is the gas thread of 1/2-2 (1/2).Can obtain colory spiral-flow type efficient acoustic wave soot blower by above dimensioned.

As shown in Figure 2, it includes Pressure gauge 8, magnetic valve 9, heat exchanger 10, soot blower 11 and time controller 12.It is the installation example of 670 tons of electricity generation boilers, 2-4 soot blower of general notes vapour stove below 35 tons, and the Large Furnace more than hundred tons evenly distributes with 20-60 soot blower; Distance between soot blower and the soot blower is a 1.5-2 rice, and the height between every layer and every layer is a 3-5 rice.Soot blower can be weaved into some groups of wheels during installation and change jobs, the quantity of every group of soot blower can be decided according to the air feed condition at scene and the air consumption of institute's use soot blower.As long as guarantee acoustic wave ash ejector 2-6 kilograms per centimeter ²Operating pressure get final product.The opening and closing time of soot blower is controlled by the triggered time automatic controller of special use, the control time have 1 second to 99 hours adjustable, do not need manually-operated, therefore have very strong practicality.

Claims

1. spiral-flow type efficient acoustic wave soot blower, it is characterized in that it includes an eddy flow cap, a spin chamber, a deflection cone, an overcoat, a voltage stabilization and current stabilization chamber, a locking extension tube attached and a contracting nozzle, wherein, said fair water cone is that upper end with deflection cone welds together and the spin chamber that constitutes; And the gap between deflection cone and the overcoat has formed contracting nozzle; Said overcoat, it with the locking extension tube attached by being threaded and deflection cone tightly being locked in outer putting, the inlet of locking extension tube attached and the constriction of deflection cone have constituted the voltage stabilization and current stabilization chamber.

2. according to the said spiral-flow type efficient acoustic wave of claim 1 soot blower, it is characterized in that said deflection cone, its angle of throat θ is 15 ° of-30 ° of scopes, and its lower end is provided with 6 to 8 circular holes, and its aperture is 4 to 30 millimeters scopes at φ.

3. according to the said spiral-flow type efficient acoustic wave of claim 1 soot blower, it is characterized in that said spout, its width is 0.2 to 4 millimeter scope.

4. according to the said spiral-flow type efficient acoustic wave of claim 1 soot blower, it is characterized in that said eddy flow cap, its inner diameter d is 20 to 90 millimeters scopes.

5. according to the said spiral-flow type efficient acoustic wave of claim 1 soot blower, it is characterized in that said spin chamber, its inner diameter φ is 8 to 30 millimeters scopes.