CN2697478Y - Thermoacoustic sound wave ash remover for hearth of boiler - Google Patents
Thermoacoustic sound wave ash remover for hearth of boiler Download PDFInfo
- Publication number
- CN2697478Y CN2697478Y CN 200420021739 CN200420021739U CN2697478Y CN 2697478 Y CN2697478 Y CN 2697478Y CN 200420021739 CN200420021739 CN 200420021739 CN 200420021739 U CN200420021739 U CN 200420021739U CN 2697478 Y CN2697478 Y CN 2697478Y
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- boiler
- sound wave
- thermoacoustics
- acoustical generator
- boiler furnace
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Abstract
The utility model discloses a thermoacoustics sound wave ash remover for hearth of boiler, comprising a thermoacoustics acoustical generator and an acoustic wave amplifier. The thermoacoustics acoustical generator comprises a resonating tube, a cold end heat exchanger, a thermoacoustics pack and a high temperature end in sequence. The acoustic wave amplifier is exponential type horn. The existing sound wave ash remover (such as siren, whistle, etc.) is realized through high pressure air driving definite sounding structure and the air compressor providing air supply need input additional energy resource and increases the structural complexity. The utility model relates to the thermoacoustics acoustical generator which adopts the flue gas of the hearth of the boiler as a driving source, the sound wave output is realized by simple thermoacoustics structure, the sound wave extracted from the resonating tube is amplified by the exponential type horn structure and the utility model gets higher acoustic pressure level to reach the level of removing ash. The ash remover is integrated in boiler system and avoids using an additional acoustical generator. The utility model does not have component which is easy to damage, and is convenient to maintain.
Description
Technical field
The utility model relates to a kind of hot several ripple soot blowers that are used for boiler furnace.
Background technology
Boiler heating surface is under the situation of slight dust stratification, and the additional thermal resistance that the dust stratification layer brings also can have a strong impact on the inside and outside heat transmission of boiler heating surface.In addition, dust stratification also can further cause heating surface to reduce service life, and the quick-fried leakage phenomenon of boiler tubes is frequent, the safety and economic operation of serious harm boiler and heat exchanger.Conventional ash-blowing method comprises that steam (or compressed air) blows ash, rapping and steel ball and method such as scrubs, and facts have proved that these methods all exist some problems to some extent in actual motion.
The mechanism of sonic soot cleaning is not to rely on medium (steam or air) directly to contact heating surface to purge dust, but the sound wave that acoustic wave ash ejector produces is sent into the area of space of dust stratification, by the acoustic energy effect, making air molecule and powder dust particle produce vibration destroys, stop powder dust particle at the heating surface surface deposition, also stop combination between the particle simultaneously, make it to be in suspended state, so that flue gas taken away it or by the self gravitation sedimentation, reach the purpose of deashing.Sound wave has isotropic directivity, can evenly be covered with whole space, carries out comprehensive deashing and prevents grey fouling.Compare with traditional ash-blowing method, it is low, effective that sonic soot blowing has investment, can influence the deposit formation mechanism, prevents from and delay deposit to form, and boiler component produces the advantages such as effect of thermal stress hardly.The common form of sound wave ash remover has siren formula and whistle formula etc.Yet the common feature of these sound wave ash removers is to need a source of high pressure air drive vocal structure, and the additional air compressor that is equipped with needs external energy, and also more complicated of system architecture.Hot several wave producer then is to utilize thermal source to drive an appropriate thermal acoustic driver structure just can realize sound wave output, is amplified to certain intensity through gathering again and just can be used for ash disposal.
Summary of the invention
The purpose of this utility model provides a kind of hot several ripple soot blowers that are used for boiler furnace.
It has heat sound acoustical generator and acoustic amplifier, heat sound acoustical generator has resonatron, cool end heat exchanger, folded, the temperature end of heat sound plate successively, be provided with thermal insulation layer in the folded outside of heat sound plate, acoustic amplifier is exponential type loudspeaker bugles, is provided with the sound wave inlet between the temperature end of heat sound acoustical generator and the exponential type loudspeaker bugle.
Present sound wave ash remover has forms such as siren formula and whistle formula, and they drive certain vocal structure by source of high pressure air, and source of the gas is then provided by air compressor, thereby needs external energy and increased the complexity of system architecture.Hot several wave producers that the utility model adopts then are to utilize thermal source (this is hands-down in boiler) as drive source, just can realize sound wave output by certain structure (i.e. the heat sound nuclear that is made of the cold and hot end heat exchanger of heat sound plate superimposition).After sound wave produces, in order to obtain higher sound pressure level, consider the sound wave of drawing from resonatron is passed through exponential type loudspeaker bugle structure, assemble amplification to reach the level that can remove dust.
Description of drawings
Accompanying drawing is the hot several ripple soot blower structural representations that are used for boiler furnace.
The specific embodiment
The hot several ripple soot blowers that are used for boiler furnace have heat sound acoustical generator and acoustic amplifier, heat sound acoustical generator has folded 3, the temperature end 4 of resonatron 1 cool end heat exchanger 2, heat sound plate successively, be provided with thermal insulation layer 5 in folded 3 outsides of heat sound plate, acoustic amplifier is an exponential type loudspeaker bugle 7, is provided with sound wave inlet 6 between the temperature end 4 of heat sound acoustical generator and the exponential type loudspeaker bugle 7.
Heat sound plate folded 3 is the boiler furnace wall with temperature end 4 junctions.The thermal source of temperature end is a boiler smoke, promptly in direct " submergence " high-temperature flue gas in burner hearth of temperature end resonatron, adds the hot end heat exchanger that heat is provided with so save in the conventional heat sound acoustical generator for input.Heat sound plate folded 3 is a ceramic porous material, has high temperature resistant and not oxidized characteristics.Exponential type loudspeaker bugle 7 is foldable type exponential type loudspeaker bugles, has dwindled its monnolithic case length, and bugle is also made with the high temperature in the anti-burner hearth by high-temperature ceramic materials.
Cool end heat exchanger (being water cooler) is arranged on the normal temperature district, cooling water is by water inlet pipe 8 and outlet pipe 9, form a relatively low temperature herein, and then form a very big temperature difference (can up to 1000 ℃) at the folded two ends of plate, be provided with that the plate of appropriate length is folded will to make the critical-temperature gradient of the thermograde at its two ends far above thermal acoustic oscillation, because of thermoacoustic effect thermal acoustic oscillation takes place and exports significantly sound wave.
The outlet of the sound wave that produces in resonatron by temperature end is incorporated in the exponential type loudspeaker bugle that is close to temperature end goes, sound wave thereby assembled amplification.Like this, just can export large amplitude sound wave at the port of export of bugle with certain frequency.According to the characteristic of sonic soot cleaning, the frequency that system's design will guarantee sound wave has reasonable dedusting effect greatly in lower frequency when the 200Hz left and right sides.In addition, the sound wave of infrasonic sound scope also has good effect to ash disposal.In view of thermoacoustic system as a resonator system, its operating frequency is directly related with physical dimension, low frequency just mean need be bigger physical dimension, so also can adopt in large-scale application scenario, and, then should not adopt time acoustic form for middle-size and small-size application scenario.
When being installed to hot several ripple soot blowers on the boiler furnace, whole high temperature distolateral (comprising partial resonance pipe and exponential type loudspeaker bugle) is placed near the boiler furnace internal protecting wall, utilizes the high-temperature flue gas mixture in the burner hearth to provide drive source for thermoacoustic system.Plate is folded all or part of position that then just is in the furnace wall of section, can directly utilize the heat-blocking action of furnace wall, for reducing scattering and disappearing of heat, can take certain reinforcement provision for thermal insulation to this furnace wall, part.After the installation, in cool end heat exchanger, lead to cooling water, just can start the work of thermoacoustic system.It should be noted that, before logical cooling water, high temperature heat in the burner hearth can be by tube wall and the folded normal temperature end that is transmitted to of plate, make cool end heat exchanger and resonatron all be in the condition of high temperature, therefore the part in burner hearth should not taked provision for thermal insulation (when system's operate as normal, thermal insulation layer is inoperative) yet.For the same reason, when design and making cool end heat exchanger, to guarantee on the technology that this heat exchanger can bear high temperature.
According to the scale of boiler, at the different parts of boiler the identical hot several ripple soot blowers of a plurality of structures are set, after each system starts working, just can in burner hearth, form an even sound field, and realize the function of online ash disposal.The output frequency of sound wave that also should guarantee each soot blower is identical or close, and the stack that helps sound wave is like this amplified, and improves sound pressure.
Claims (6)
1. hot several ripple soot blowers that are used for boiler furnace, it is characterized in that: it has heat sound acoustical generator and acoustic amplifier, heat sound acoustical generator has resonatron (1), cool end heat exchanger (2), heat sound plate folded (3), temperature end (4) successively, be provided with thermal insulation layer (5) in heat sound plate folded (3) outside, acoustic amplifier is an exponential type loudspeaker bugle (7), is provided with sound wave inlet (6) between the temperature end (4) of heat sound acoustical generator and the exponential type loudspeaker bugle (7).
2. a kind of hot several ripple soot blowers that are used for boiler furnace according to claim 1 it is characterized in that said heat sound plate folded (3) is the boiler furnace inwall with temperature end (4) junction, and thermal insulation layer (5) replace with the burner hearth wall thickness.
3. a kind of hot several ripple soot blowers that are used for boiler furnace according to claim 1, the thermal source that it is characterized in that said temperature end is a boiler smoke.
4. a kind of hot several ripple soot blowers that are used for boiler furnace according to claim 1 is characterized in that said heat sound plate folded (3) is the refractory ceramics porous material.
5. a kind of hot several ripple soot blowers that are used for boiler furnace according to claim 1 is characterized in that said exponential type loudspeaker bugle (7) is a foldable type exponential type loudspeaker bugle.
6. a kind of hot several ripple soot blowers that are used for boiler furnace according to claim 1, the material that it is characterized in that said exponential type loudspeaker bugle (7) is a high-temperature ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021739 CN2697478Y (en) | 2004-04-09 | 2004-04-09 | Thermoacoustic sound wave ash remover for hearth of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021739 CN2697478Y (en) | 2004-04-09 | 2004-04-09 | Thermoacoustic sound wave ash remover for hearth of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2697478Y true CN2697478Y (en) | 2005-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420021739 Expired - Lifetime CN2697478Y (en) | 2004-04-09 | 2004-04-09 | Thermoacoustic sound wave ash remover for hearth of boiler |
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| Country | Link |
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| CN (1) | CN2697478Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017179A (en) * | 2011-09-28 | 2013-04-03 | 江苏大自然电器标牌厂 | Acoustic energy power amplifier |
-
2004
- 2004-04-09 CN CN 200420021739 patent/CN2697478Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017179A (en) * | 2011-09-28 | 2013-04-03 | 江苏大自然电器标牌厂 | Acoustic energy power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040409 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |