CN112610976A - Self-cleaning rotary air preheater with middle sound wave soot blowing function - Google Patents
Self-cleaning rotary air preheater with middle sound wave soot blowing function Download PDFInfo
- Publication number
- CN112610976A CN112610976A CN202011111905.8A CN202011111905A CN112610976A CN 112610976 A CN112610976 A CN 112610976A CN 202011111905 A CN202011111905 A CN 202011111905A CN 112610976 A CN112610976 A CN 112610976A
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- CN
- China
- Prior art keywords
- air preheater
- sound wave
- heat exchange
- rotary air
- rotor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 239000004071 soot Substances 0.000 title claims abstract description 18
- 238000004140 cleaning Methods 0.000 title claims abstract description 16
- 238000007664 blowing Methods 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000012546 transfer Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 4
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000003546 flue gas Substances 0.000 abstract description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- 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
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a self-cleaning rotary air preheater with middle sound wave soot blowing, which belongs to the technical field of new energy and energy conservation and comprises a rotary air preheater rotor and a rotor shell outside the rotary air preheater rotor, wherein a hot section heat exchange element and a cold section heat exchange element are arranged inside the rotary air preheater rotor along the axial direction, a sound wave transmission channel is reserved between the hot section heat exchange element and the cold section heat exchange element, a sound wave generator is connected to the outside of the rotor shell, the sound wave generator is communicated with the sound wave transmission channel through a wave guide cylinder, and the sound wave generator is connected with a compressed air electromagnetic valve. The invention uses sound wave with certain frequency generated by a sound wave generator to guide the sound wave into the middle parts of the cold and hot end heat exchange elements, and the metal sheets of the cold and hot end heat exchange elements resonate with the sound wave to shake down ammonium bisulfate and ash deposited on the surfaces of the heat exchange elements and discharge the ammonia bisulfate and the ash along with flue gas, thereby achieving the purpose of self-cleaning of the rotary air preheater and solving the problem of blockage of the air preheater.
Description
Technical Field
The invention relates to a self-cleaning rotary air preheater with middle sound wave soot blowing, belongs to the technical field of new energy and energy conservation, and is suitable for a thermal generator set.
Background
The thermal power factory all sets up air heater for reducing exhaust gas temperature, improving boiler efficiency and improving combustion-supporting wind temperature simultaneously. The unit with the capacity of more than 300MW is widely applied to the rotary air preheater, and has the advantages of small metal consumption, strong heat transfer capacity and convenient soot blowing and water washing in operation; the defects are that the air leakage rate is high and the blockage is serious. In recent years, due to the requirement of environmental protection, after an ammonia denitration system is put into use, an air preheater is seriously blocked, particularly a unit burning high-sulfur coal is used, sulfur is combusted in a boiler to produce sulfur dioxide and a small amount of sulfur trioxide, and the sulfur dioxide is partially oxidized into sulfur trioxide through a denitration catalyst. Sulfur trioxide reacts with the ammonia of escape and generates ammonium bisulfate, ammonium bisulfate is the very strong material of viscidity because its physical characteristic is in the liquid state, bond in rotary air heater heat transfer original paper middle part with the flying dust, because the heat transfer original paper height is at 2.0 meters to 2.7 meters, it is cold, the deposit can't effectively be clear away to the hot junction soot blower at the ammonium bisulfate deposition in air preheater middle part, air preheater resistance will continuously rise, forced frequently carry out air heater water washing and air heater and blow the ash in succession, cause air heater heat transfer original paper damaged seriously, life shortens by a wide margin, increase the power plant and overhaul maintenance cost, influence the economic nature of unit operation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a self-cleaning rotary air preheater with middle sound wave soot blowing, which has reasonable structural design, wherein sound waves with specific frequency generated by a sound wave generator are guided into the middle parts of cold and hot end heat exchange elements, metal sheets of the cold and hot end heat exchange elements resonate with the sound waves to vibrate ammonium bisulfate and ash deposited on the surfaces of the heat exchange elements to be discharged along with flue gas, so that the problem that the ammonium bisulfate and the ash deposited in the middle parts of the air preheater in the prior art cannot be removed by a cold and hot end steam soot blower is solved, and the problems of serious blockage, high resistance, high air leakage rate, high power consumption of auxiliary machinery, high boiler exhaust temperature and the like of the air preheater are solved.
The technical scheme adopted by the invention for solving the problems is as follows: a self-cleaning rotary air preheater with middle sound wave soot blowing comprises a rotary air preheater rotor and a rotor shell outside the rotary air preheater rotor, and is characterized in that a hot section heat exchange element and a cold section heat exchange element are arranged inside the rotary air preheater rotor along the axial direction, a sound wave transmission channel is reserved between the hot section heat exchange element and the cold section heat exchange element, sound waves enter the sound wave transmission channel from the rotor shell and are transmitted to the inside of the rotary air preheater rotor along the diameter direction, and the hot section heat exchange element and the cold section heat exchange element vibrate under the action of the sound waves; the rotor comprises a rotor shell, and is characterized in that a sound generator is connected to the outer part of the rotor shell and communicated with a sound wave transmission channel through a wave guide cylinder, the sound generator is a diaphragm type sound generator driven by compressed air or steam, sound waves generated by the sound generator are transmitted to the inner part of a rotor of the rotary air preheater through the wave guide cylinder, the sound generator is connected with a compressed air electromagnetic valve, and the start and stop of the sound generator are controlled by the compressed air electromagnetic valve.
Furthermore, the sound wave transmission channel is located in the radial direction of the rotor of the rotary air preheater, the outlet height of the wave guide cylinder is 10cm-20cm, and correspondingly, a square hole with the height of 10cm-20cm is formed in the side wall of the rotor shell and used for communicating the wave guide cylinder with the sound wave transmission channel.
Furthermore, inside the rotor of the rotary air preheater, a bracket is used for supporting the hot section heat exchange element and the cold section heat exchange element of each compartment to form a sector columnar cavity, the number of the sector columnar cavities is the same as that of the compartments of the air preheater, and each compartment is provided with one cavity and is independent of the other compartment.
Further, the sound generator is fixed on a wave guide cylinder, the wave guide cylinder is fixed on the rotor shell, and an outlet of the wave guide cylinder faces the sound wave transmission channel.
Furthermore, sound waves emitted by the sound wave generator are transmitted into the rotary air preheater rotor through the wave guide cylinder, the sound waves enter the rotary air preheater rotor from the sound wave transmission channel, and the heat exchange element vibrates under the action of the sound waves.
Furthermore, due to the fact that the mode of sonic purging from the middle of the cold and hot sections is added, the heat exchange plates are driven by sound waves to vibrate to shake off ammonium bisulfate and ash, the purpose of self-cleaning of the rotary air preheater can be achieved, and the operation differential pressure of the rotary air preheater is reduced; due to the reduction of the operation pressure difference, the air leakage rate of the air preheater can be reduced, and the power consumption of a boiler fan can be reduced; the invention can be directly manufactured according to the scheme and also can be formed by reforming an active rotary air preheater.
Compared with the prior art, the invention has the following advantages and effects: according to the invention, the soot blowing channel is arranged between the heat exchange elements at the cold section and the hot section, the sound wave generator is correspondingly arranged at the opening of the channel, the heat exchange plate is driven to vibrate by sound waves, so that ash on the heat exchange plate is vibrated, the problem that ammonia bisulfate and ash in the middle of the heat transfer element cannot be effectively removed by performing steam soot blowing from the cold end and the hot end is solved, the purpose of self-cleaning of the rotary air preheater is achieved, the heat transfer element of the air preheater can be ensured to be clean and not blocked, and the problem of blockage of the air preheater is; the operation differential pressure of the air preheater is reduced, the air leakage rate of the air preheater is reduced, and the power consumption rate of a boiler fan is reduced; the heat exchange element is driven to be self-cleaned by sound waves, so that the use frequency of the steam soot blower can be reduced, soot blowing steam can be greatly saved, and the blowing loss of the steam soot blower to the heat transfer element, particularly the enamel heat transfer element, can be reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
FIG. 3 is a schematic view of the structure of the sound wave generator according to the present invention.
In the figure: the device comprises a rotary air preheater rotor 1, a rotor shell 2, a wave guide cylinder 3, a hot section heat exchange element 4, a sound wave transmission channel 5, a cold section heat exchange element 6, a compressed air electromagnetic valve 7 and a sound wave generator 8.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, a self-cleaning rotary air preheater with middle sound wave soot blowing comprises a rotary air preheater rotor 1 and a rotor shell 2 outside the rotary air preheater rotor 1, wherein a hot section heat exchange element 4 and a cold section heat exchange element 6 are arranged in the rotary air preheater rotor 1 along the axial direction, a sound wave transmission channel 5 is reserved between the hot section heat exchange element 4 and the cold section heat exchange element 6, and sound waves enter the sound wave transmission channel 5 from the rotor shell 2 and are transmitted to the inside of the rotary air preheater rotor 1 along the diameter direction; the external of rotor shell 2 is connected with acoustic generator 8, acoustic generator 8 passes through waveguide cylinder 3 and communicates with sound wave transfer passage 5, and acoustic generator 8 is the diaphragm formula acoustic generator by compressed air or steam drive, and the sound wave that acoustic generator 8 produced is conveyed to the inside of rotary air preheater rotor 1 by waveguide cylinder 3, and acoustic generator 8 is connected with compressed air solenoid valve 7, and the start-stop of acoustic generator 8 is controlled by compressed air solenoid valve 7.
Specifically, the sound wave transmission channel 5 is located in the radial direction of the rotary air preheater rotor 1, the outlet height of the wave guide cylinder 3 is 10cm-20cm, and correspondingly, a square hole with the height of 10cm-20cm is formed in the side wall of the rotor shell 2 and used for communicating the wave guide cylinder 3 with the sound wave transmission channel 5.
Specifically, inside the rotor 1 of the rotary air preheater, a hot section heat exchange element 4 and a cold section heat exchange element 6 of each compartment are supported by a support to form a sector columnar cavity, the number of the sector columnar cavities is the same as that of the compartments of the air preheater, and each compartment is provided with one cavity and is independent of the other compartment.
Specifically, the acoustic wave generator 8 is fixed to the wave guide cylinder 3, the wave guide cylinder 3 is fixed to the rotor housing 2, and an outlet of the wave guide cylinder 3 faces the acoustic wave transmission channel 5.
Specifically, sound waves emitted by the sound wave generator 8 are transmitted into the rotary air preheater rotor 1 through the wave guide cylinder 3, the sound waves enter the rotary air preheater rotor 1 from the sound wave transmission channel 5, and the heat exchange element vibrates under the action of the sound waves.
Specifically, the air preheater can be directly manufactured according to the scheme, and can also be formed by reforming an active rotary air preheater.
The use process comprises the following steps: when the rotary air preheater rotor 1 normally operates, the electrified interval of the compressed air electromagnetic valve 7 is set, the sound wave generator 8 is periodically started, sound waves generated by the sound wave generator 8 are guided into the sound wave transmission channel 5 through the wave guide cylinder 3, the sound waves and the heat exchange plates resonate in the sound wave transmission channel 5, and the vibration of the heat exchange plates enables ammonium bisulfate and ash to be taken away by smoke after vibration, so that the self-cleaning effect is started.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structures of the present invention. All equivalent variations of the structures, features and principles described in accordance with the present inventive concepts are included within the scope of the present invention. Those skilled in the art to which the invention relates will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (5)
1. A self-cleaning rotary air preheater with middle sound wave soot blowing comprises a rotary air preheater rotor (1) and a rotor shell (2) outside the rotary air preheater rotor (1), and is characterized in that a hot section heat exchange element (4) and a cold section heat exchange element (6) are arranged in the rotary air preheater rotor (1) along the axial direction, a sound wave transmission channel (5) is reserved between the hot section heat exchange element (4) and the cold section heat exchange element (6), sound waves enter the sound wave transmission channel (5) from the rotor shell (2) and are transmitted to the inside of the rotary air preheater rotor (1) along the diameter direction, and the hot section heat exchange element (4) and the cold section heat exchange element (6) vibrate under the action of the sound waves; the outer part of the rotor shell (2) is connected with a sound wave generator (8), the sound wave generator (8) is communicated with the sound wave transmission channel (5) through a wave guide cylinder (3), the height of an outlet of the wave guide cylinder (3) is 10cm-20cm, correspondingly, a square hole with the height of 10cm-20cm is formed in the side wall of the rotor shell (2) and used for communicating the wave guide cylinder (3) with the sound wave transmission channel (5), and sound waves generated by the sound wave generator (8) are transmitted to the inner part of the rotary air preheater rotor (1) through the wave guide cylinder (3); the sound generator (8) is connected with a compressed air electromagnetic valve (7), and the start and stop of the sound generator (8) are controlled by the compressed air electromagnetic valve (7).
2. Self-cleaning rotary air preheater with mid-range acoustic sootblowing according to claim 1, characterized in that the acoustic generator (8) is a diaphragm acoustic generator driven by compressed air or steam.
3. Self-cleaning rotary air preheater with mid-acoustic sootblowing according to claim 1, characterized in that the acoustic transfer channels (5) are located in the radial direction of the rotary air preheater rotor (1).
4. A self-cleaning rotary air preheater with mid-section sonic soot blowing as claimed in claim 1, wherein inside the rotary air preheater rotor (1), a sector-shaped cylindrical cavity is formed by supporting the hot section heat exchange element (4) and the cold section heat exchange element (6) of each compartment with a bracket.
5. The self-cleaning rotary air preheater with middle acoustic soot blowing of claim 1, wherein the acoustic generator (8) is fixed on a wave guide cylinder (3), the wave guide cylinder (3) is fixed on the rotor housing (2), and the outlet of the wave guide cylinder (3) faces the acoustic transmission channel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011111905.8A CN112610976A (en) | 2020-10-16 | 2020-10-16 | Self-cleaning rotary air preheater with middle sound wave soot blowing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011111905.8A CN112610976A (en) | 2020-10-16 | 2020-10-16 | Self-cleaning rotary air preheater with middle sound wave soot blowing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112610976A true CN112610976A (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011111905.8A Pending CN112610976A (en) | 2020-10-16 | 2020-10-16 | Self-cleaning rotary air preheater with middle sound wave soot blowing function |
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| Country | Link |
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| CN (1) | CN112610976A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004116799A (en) * | 2002-09-24 | 2004-04-15 | Electric Power Dev Co Ltd | Operation method of sound wave type soot blower |
| CN201764516U (en) * | 2010-09-17 | 2011-03-16 | 张荣初 | High sound intensity sound-wave expeller |
| CN204240371U (en) * | 2014-10-12 | 2015-04-01 | 大唐陕西发电有限公司 | A kind of on-line cleaning antiscaling device for desulfurization GGH |
| CN208186392U (en) * | 2018-05-20 | 2018-12-04 | 辽宁中鑫自动化仪表有限公司 | Rotary regenerative air heater sound wave ash cleaner |
| CN110513712A (en) * | 2019-07-10 | 2019-11-29 | 华电电力科学研究院有限公司 | A method of prevent air preheater from blocking using pulse of compressed air soot blowing |
| CN211146527U (en) * | 2019-11-22 | 2020-07-31 | 开曼铝业（三门峡）有限公司 | Boiler ash cleaning device applying sound wave ash cleaning principle |
-
2020
- 2020-10-16 CN CN202011111905.8A patent/CN112610976A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004116799A (en) * | 2002-09-24 | 2004-04-15 | Electric Power Dev Co Ltd | Operation method of sound wave type soot blower |
| CN201764516U (en) * | 2010-09-17 | 2011-03-16 | 张荣初 | High sound intensity sound-wave expeller |
| CN204240371U (en) * | 2014-10-12 | 2015-04-01 | 大唐陕西发电有限公司 | A kind of on-line cleaning antiscaling device for desulfurization GGH |
| CN208186392U (en) * | 2018-05-20 | 2018-12-04 | 辽宁中鑫自动化仪表有限公司 | Rotary regenerative air heater sound wave ash cleaner |
| CN110513712A (en) * | 2019-07-10 | 2019-11-29 | 华电电力科学研究院有限公司 | A method of prevent air preheater from blocking using pulse of compressed air soot blowing |
| CN211146527U (en) * | 2019-11-22 | 2020-07-31 | 开曼铝业（三门峡）有限公司 | Boiler ash cleaning device applying sound wave ash cleaning principle |
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Application publication date: 20210406 |