WO2001078912A1 - Apparatus and method for acoustic cleaning - Google Patents

Apparatus and method for acoustic cleaning Download PDF

Info

Publication number
WO2001078912A1
WO2001078912A1 PCT/FI2001/000360 FI0100360W WO0178912A1 WO 2001078912 A1 WO2001078912 A1 WO 2001078912A1 FI 0100360 W FI0100360 W FI 0100360W WO 0178912 A1 WO0178912 A1 WO 0178912A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
combustion chamber
acoustic
combustion
electrolytic unit
Prior art date
Application number
PCT/FI2001/000360
Other languages
French (fr)
Inventor
Heikki Ahonen
Arttu Salmela
Original Assignee
Nirania Ky
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nirania Ky filed Critical Nirania Ky
Priority to AU2001254850A priority Critical patent/AU2001254850A1/en
Publication of WO2001078912A1 publication Critical patent/WO2001078912A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • G10K15/043—Sound-producing devices producing shock waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • B08B7/026—Using sound waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G7/00—Cleaning by vibration or pressure waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G7/00—Cleaning by vibration or pressure waves
    • F28G7/005—Cleaning by vibration or pressure waves by explosions or detonations; by pressure waves generated by combustion processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/157—Generating seismic energy using spark discharges; using exploding wires

Definitions

  • the invention concerns an apparatus and method for acoustic cleaning.
  • Acoustic cleaning which is also called acoustic chimney sweeping, is a method used e.g. for cleaning boilers, silos, cyclones, blowing fans, filtering apparatuses and other such.
  • the acoustic cleaning method can be used in such places where e.g. powdery substances are treated or where e.g. soot or dust result as harmful byproducts. Such particles easily form pile-ups, which will make the progress of the process difficult and will reduce its functionality.
  • acoustic wave sound wave
  • the force carried to each particle by the sound pressure impulse must exceed the force keeping the particles adhering to the base or keeping the particles adhering to each other.
  • the typical duration of the sound pressure impulse is a few seconds, and these impulses are supplied with intervals of 2-15 minutes.
  • a typical basic frequency of the sound is 20-360 Hz and the strength of the sound pressure level typically used is 130-200 dB.
  • a method wherein a fuel mixture is brought into a combustion chamber, and the mixture is burnt explosively.
  • An arrangement of this kind is known from publication abstract SU-871186.
  • safety risks occur, which result from the use of easily inflammable fuels in a hot power plant environment.
  • the explosion impulse may break fuel tubing in the acoustic cleaning apparatus, which again will cause a risk of fire or explosion.
  • Another problem is the relatively slow combustion in the long cylindrical combustion chamber.
  • the purpose of the present invention is to solve the problems occurring in state-of- the-art arrangements and to bring about a safer and more efficient apparatus and method for generating sound pressure impulses for acoustic cleaning.
  • the apparatus according to the present invention is characterised mainly in that the apparatus is equipped with an electrolytic unit to produce fuel electrolytically and to use the fuel in the combustion chamber in explosive combustion.
  • the method according to the invention for its part is characterised in that the method comprises the steps of equipping an acoustic cleaning apparatus with an electrolytic unit, producing fuel electrolytically in the electrolytic unit, conducting the fuel along a fuel line to a combustion chamber, and activating igniters in the combustion chamber.
  • fuel gases are used to generate a sound pressure impulse, which fuel gases are brought about electrolytically in connection with the acoustic cleaning apparatus by using water as the raw material and e.g. potassium hydroxide or some other inorganic salt as the electrolyte.
  • water as the raw material
  • e.g. potassium hydroxide or some other inorganic salt as the electrolyte.
  • the acoustic cleaning apparatus 10 includes a combustion chamber 11, an acoustic horn 12, a power source 13, a timer 14, an electrolytic unit 15 and a voltage source 16.
  • Water is supplied along a line L a to the electrolytic unit 15, which uses a suitable electrolyte, e.g. potassium hydroxide or some other inorganic salt, to bring about electrolysis. Separation of hydrogen from oxygen is achieved by the electrolytic unit 15, when a voltage difference is connected between the positive and negative poles from the voltage source 16.
  • the resulting combustion gas H 2 is conducted to combustion chamber 11 through line L 2 .
  • the combustion chamber 11 is equipped with igniters SP, which are activated by the timer 14 to start an explosive combustion. There may be one or more igniters SP. When several igniters are used, preferably three or more, a more uniform combustion event is achieved. In the arrangement according to the invention, combustion is quick and complete, producing pure water as the combustion product.
  • the combustion chamber 11 is equipped with a pressure sensor 17, which is used to monitor the state of combustion chamber 11 and to observe the combustion event occurring after a successful ignition.
  • the electric circuit of the electrolytic unit 15 is reactivated. Should triggering of the igniting spark fail to trigger a new combustion event, then the automatic safety system of the apparatus 10 will turn off the current to the apparatus 10 and give an alarm announcement.
  • the acoustic cleaning apparatus may be equipped with safety automatics, which will prevent operation of the apparatus e.g. in a situation where there is not a normal operating temperature in the space to be cleaned. Any dust explosions in a cold space are hereby avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Multimedia (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Cleaning In General (AREA)

Abstract

The invention concerns an apparatus for acoustic cleaning apparatus (10) includes a combustion chamber (11), an acoustic horn (12), a fuel supply line (L2) and one or more igniters (SP) for igniting the fuel. The apparatus (10) is equipped with an electrolytic unit (15) to produce fuel electrolytically and to use the fuel in the combustion chamber (11) in explosive combustion. The invention also concerns a method for acoustic cleaning. In the method, an acoustic cleaning apparatus (10) is equipped with an electrolic unit (15), fuel is produced electrolytically in the electrolytic unit (15), the fuel is conducted along a fuel line (L2) to the combustion chamber (11) and igniters (SP) in the combustion chamber (11) are activated.

Description

Apparatus and method for acoustic cleaning
The invention concerns an apparatus and method for acoustic cleaning.
Acoustic cleaning, which is also called acoustic chimney sweeping, is a method used e.g. for cleaning boilers, silos, cyclones, blowing fans, filtering apparatuses and other such. The acoustic cleaning method can be used in such places where e.g. powdery substances are treated or where e.g. soot or dust result as harmful byproducts. Such particles easily form pile-ups, which will make the progress of the process difficult and will reduce its functionality.
The possibility to operate without interrupting the process is an advantage of acoustic cleaning compared with various mechanical cleaning methods. Another noteworthy advantage is the method's ability to clean also fringe areas and other places, which are difficult to reach. The method does not wear and tear the objects to be cleaned, it is easy to use and its maintenance costs are low.
In acoustic cleaning, the object to be cleaned is subjected to an acoustic wave (sound wave), which carries a pressure shock to the particles to be worked loose. In order to achieve a cleaning result, the force carried to each particle by the sound pressure impulse must exceed the force keeping the particles adhering to the base or keeping the particles adhering to each other.
Acoustic cleaning apparatuses are known e.g. from the publications WO-82/01328 and WO-82/03803.
hi an acoustic cleaning apparatus, the typical duration of the sound pressure impulse is a few seconds, and these impulses are supplied with intervals of 2-15 minutes. A typical basic frequency of the sound is 20-360 Hz and the strength of the sound pressure level typically used is 130-200 dB.
To form a sound pressure impulse a method is known, wherein a fuel mixture is brought into a combustion chamber, and the mixture is burnt explosively. An arrangement of this kind is known from publication abstract SU-871186. In such arrangements safety risks occur, which result from the use of easily inflammable fuels in a hot power plant environment. In addition, the explosion impulse may break fuel tubing in the acoustic cleaning apparatus, which again will cause a risk of fire or explosion. Another problem is the relatively slow combustion in the long cylindrical combustion chamber.
The purpose of the present invention is to solve the problems occurring in state-of- the-art arrangements and to bring about a safer and more efficient apparatus and method for generating sound pressure impulses for acoustic cleaning.
The apparatus according to the present invention is characterised mainly in that the apparatus is equipped with an electrolytic unit to produce fuel electrolytically and to use the fuel in the combustion chamber in explosive combustion.
The method according to the invention for its part is characterised in that the method comprises the steps of equipping an acoustic cleaning apparatus with an electrolytic unit, producing fuel electrolytically in the electrolytic unit, conducting the fuel along a fuel line to a combustion chamber, and activating igniters in the combustion chamber.
In the arrangement according to the present invention, fuel gases are used to generate a sound pressure impulse, which fuel gases are brought about electrolytically in connection with the acoustic cleaning apparatus by using water as the raw material and e.g. potassium hydroxide or some other inorganic salt as the electrolyte. With such an arrangement no separate fuel storage is needed, whereby no problems will result from the storing of easily inflammable fuel gases. Hereby, pure water also results as the combustion result of the explosive combustion produced to bring about the sound pressure impulse, which is advantageous in environmental terms.
In the following, the invention will be described in greater detail with reference to the appended drawing, which shows the functional diagram of the acoustic cleaning apparatus according to the invention.
The acoustic cleaning apparatus 10 includes a combustion chamber 11, an acoustic horn 12, a power source 13, a timer 14, an electrolytic unit 15 and a voltage source 16. Water is supplied along a line La to the electrolytic unit 15, which uses a suitable electrolyte, e.g. potassium hydroxide or some other inorganic salt, to bring about electrolysis. Separation of hydrogen from oxygen is achieved by the electrolytic unit 15, when a voltage difference is connected between the positive and negative poles from the voltage source 16. The resulting combustion gas H2 is conducted to combustion chamber 11 through line L2. The combustion chamber 11 is equipped with igniters SP, which are activated by the timer 14 to start an explosive combustion. There may be one or more igniters SP. When several igniters are used, preferably three or more, a more uniform combustion event is achieved. In the arrangement according to the invention, combustion is quick and complete, producing pure water as the combustion product.
In an advantageous embodiment of the invention, the combustion chamber 11 is equipped with a pressure sensor 17, which is used to monitor the state of combustion chamber 11 and to observe the combustion event occurring after a successful ignition.
After each successful ignition, the electric circuit of the electrolytic unit 15 is reactivated. Should triggering of the igniting spark fail to trigger a new combustion event, then the automatic safety system of the apparatus 10 will turn off the current to the apparatus 10 and give an alarm announcement.
In addition, the acoustic cleaning apparatus according to the present invention may be equipped with safety automatics, which will prevent operation of the apparatus e.g. in a situation where there is not a normal operating temperature in the space to be cleaned. Any dust explosions in a cold space are hereby avoided.
In the following the patent claims are presented, to which the invention is not limited exclusively.

Claims

Claims
1. Apparatus for acoustic cleaning, which apparatus (10) includes a combustion chamber (11), an acoustic horn (12), a fuel supply line (L2) and one or more igniters (SP) to ignite the fuel, characterised in that the apparatus (10) is equipped with an electrolytic unit (15) to produce fuel electrolytically and to use the fuel in the combustion chamber (11) in explosive combustion.
2. Apparatus as defined in claim 1, characterised in that the electrolytic unit (15) is adapted to produce fuel from water in the presence of an electrolyte.
3. Apparatus as defined in claim 1 or 2, characterised in that the electrolyte is potassium hydroxide or some other inorganic salt.
4. Method for acoustic cleaning, characterised in that the method comprises the steps of:
- equipping an acoustic cleaning apparatus (10) with an electrolytic unit (15),
- producing fuel electrolytically in the electrolytic unit (15),
- conducting the fuel along a fuel line (I^) to a combustion chamber (11), and - activating igniters (SP) in the combustion chamber (11).
5. Method as defined in Claim 4, characterised by activating the electrolytic unit (15) after a successful combustion.
6. Method as defined in Claim 4 or 5, characterised by equipping the apparatus
(10) with safety automatics, which will prevent operation of the apparatus (10) when the object to be cleaned is not in normal use.
7. Method as defined in any one of Claims 4-6, characterised by noticing a successful explosive combustion event by a pressure sensor (17).
PCT/FI2001/000360 2000-04-14 2001-04-11 Apparatus and method for acoustic cleaning WO2001078912A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001254850A AU2001254850A1 (en) 2000-04-14 2001-04-11 Apparatus and method for acoustic cleaning

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20000893 2000-04-14
FI20000893A FI109098B (en) 2000-04-14 2000-04-14 Acoustic Cleaning Apparatus and Method

Publications (1)

Publication Number Publication Date
WO2001078912A1 true WO2001078912A1 (en) 2001-10-25

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AU (1) AU2001254850A1 (en)
FI (1) FI109098B (en)
WO (1) WO2001078912A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533048A1 (en) * 2003-11-20 2005-05-25 United Technologies Corporation Control of detonative cleaning apparatus
WO2005095008A1 (en) * 2004-04-02 2005-10-13 Nirafon Oy Method and apparatus for generating gas pulses
US7011047B2 (en) 2003-11-20 2006-03-14 United Technologies Corporation Detonative cleaning apparatus
US7104223B2 (en) 2003-11-20 2006-09-12 United Technologies Corporation Detonative cleaning apparatus
US7267134B2 (en) 2004-03-15 2007-09-11 United Technologies Corporation Control of detonative cleaning apparatus
FR2903178A1 (en) * 2006-07-03 2008-01-04 Rech S De L Ecole Nationale Su METHOD AND DEVICE FOR CLEANING SURFACES OF RUNNING WATER IN AN AIR / WATER THERMAL EXCHANGER
WO2010025574A2 (en) * 2008-09-04 2010-03-11 Explo Engineering Gmbh Apparatus and method for producing explosions
CN102588108A (en) * 2011-01-07 2012-07-18 高宗寓 Cleaning device for internal combustion engine
CN105392570A (en) * 2013-07-22 2016-03-09 艾克维斯塔股份有限公司 Machine tool window
CN108413424A (en) * 2018-05-16 2018-08-17 河南理工大学 A kind of adjustable hydrogen-oxygen detonation safety type boiler of power plant soot blower of equivalent proportion
CN112317461A (en) * 2019-08-05 2021-02-05 康宁股份有限公司 Sonic cleaning of fiber draw furnace
WO2022105752A1 (en) * 2020-11-17 2022-05-27 北京滤分环保技术有限责任公司 Method and device for removing impurities from granular material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053085A1 (en) * 1980-11-26 1982-06-02 Etablissements SOMALOR - FERRARI "SOMAFER" S.A. Method of cleaning surfaces soiled by deposits accrued during conbustion of carbon materials
US5799624A (en) * 1993-07-02 1998-09-01 Hsieh; Wen-Chan Electrolytic fueling system for engine
WO1998053926A1 (en) * 1997-05-28 1998-12-03 Ulf Krogars Method and apparatus for acoustic cleaning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053085A1 (en) * 1980-11-26 1982-06-02 Etablissements SOMALOR - FERRARI "SOMAFER" S.A. Method of cleaning surfaces soiled by deposits accrued during conbustion of carbon materials
US5799624A (en) * 1993-07-02 1998-09-01 Hsieh; Wen-Chan Electrolytic fueling system for engine
WO1998053926A1 (en) * 1997-05-28 1998-12-03 Ulf Krogars Method and apparatus for acoustic cleaning

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7011047B2 (en) 2003-11-20 2006-03-14 United Technologies Corporation Detonative cleaning apparatus
US7104223B2 (en) 2003-11-20 2006-09-12 United Technologies Corporation Detonative cleaning apparatus
AU2004229043B2 (en) * 2003-11-20 2007-04-26 United Technologies Corporation Control of detonative cleaning apparatus
EP1533048A1 (en) * 2003-11-20 2005-05-25 United Technologies Corporation Control of detonative cleaning apparatus
US7267134B2 (en) 2004-03-15 2007-09-11 United Technologies Corporation Control of detonative cleaning apparatus
US7585372B2 (en) 2004-04-02 2009-09-08 Nirafon Oy Method and apparatus for generating gas pulses
WO2005095008A1 (en) * 2004-04-02 2005-10-13 Nirafon Oy Method and apparatus for generating gas pulses
AU2007271079B2 (en) * 2006-07-03 2011-02-10 Dyanergie Method and device for cleaning the water trickling surfaces in an air/water heat exchanger
FR2903178A1 (en) * 2006-07-03 2008-01-04 Rech S De L Ecole Nationale Su METHOD AND DEVICE FOR CLEANING SURFACES OF RUNNING WATER IN AN AIR / WATER THERMAL EXCHANGER
WO2008003851A2 (en) * 2006-07-03 2008-01-10 Dyanergie Method and device for cleaning the water trickling surfaces in an air/water heat exchanger
WO2008003851A3 (en) * 2006-07-03 2008-04-03 Rech S De L Ecole Nationale Su Method and device for cleaning the water trickling surfaces in an air/water heat exchanger
US8393051B2 (en) 2006-07-03 2013-03-12 Dyanergie Method and device for cleaning the water trickling surfaces in an air/water heat exchanger
US8973362B2 (en) 2008-09-04 2015-03-10 Explo Engineering Gmbh Method and device for producing explosions
CN102165517A (en) * 2008-09-04 2011-08-24 爆破工程有限公司 Apparatus and method for producing explosions
WO2010025574A3 (en) * 2008-09-04 2011-01-06 Explo Engineering Gmbh Apparatus and method for producing explosions
WO2010025574A2 (en) * 2008-09-04 2010-03-11 Explo Engineering Gmbh Apparatus and method for producing explosions
CN102588108A (en) * 2011-01-07 2012-07-18 高宗寓 Cleaning device for internal combustion engine
CN105392570A (en) * 2013-07-22 2016-03-09 艾克维斯塔股份有限公司 Machine tool window
US10150143B2 (en) 2013-07-22 2018-12-11 Echovista Gmbh Apparatus and method for clearing water from a window
US10207300B2 (en) 2013-07-22 2019-02-19 Echovista Gmbh Ultrasonically clearing precipitation
CN108413424A (en) * 2018-05-16 2018-08-17 河南理工大学 A kind of adjustable hydrogen-oxygen detonation safety type boiler of power plant soot blower of equivalent proportion
CN112317461A (en) * 2019-08-05 2021-02-05 康宁股份有限公司 Sonic cleaning of fiber draw furnace
WO2021022914A1 (en) * 2019-08-05 2021-02-11 康宁股份有限公司 Acoustic wave cleaning of optical fiber drawing furnace
US11407012B2 (en) 2019-08-05 2022-08-09 Corning Incorporated Sonic cleaning of optical fiber draw furnace
WO2022105752A1 (en) * 2020-11-17 2022-05-27 北京滤分环保技术有限责任公司 Method and device for removing impurities from granular material

Also Published As

Publication number Publication date
FI109098B (en) 2002-05-31
AU2001254850A1 (en) 2001-10-30
FI20000893A (en) 2001-10-15
FI20000893A0 (en) 2000-04-14

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