CN206875458U - Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler - Google Patents
Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler Download PDFInfo
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- CN206875458U CN206875458U CN201720752224.7U CN201720752224U CN206875458U CN 206875458 U CN206875458 U CN 206875458U CN 201720752224 U CN201720752224 U CN 201720752224U CN 206875458 U CN206875458 U CN 206875458U
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Abstract
The utility model discloses low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler, including economizer, the denitration SCR being sequentially connected with（SCR）Reactor and air preheater, in the economizer, denitration SCR（SCR）On reactor and air preheater, the high-strength sound source of Frequency Adjustable is provided with, the high-strength sound source of the Frequency Adjustable controls sounding by unified control unit.The utility model can ensure the cleaning of heating surface, it is ensured that the heat exchanger such as economizer, air preheater reaches the heat exchanger effectiveness of design, it is ensured that denitration SCR（SCR）Reactor denitrating catalyst activity, boiler is reduced because heat exchanger surface pollution causes heat exchanger effectiveness to decline and increased fuel consumption, reduces because denitrating catalyst activity reduces and increased ammonia spraying amount, saves the energy, it is ensured that NOXEmission compliance.
Description
Technical field
Low-temperature region in sonic soot cleaning energy-saving equipment, more particularly to a kind of supercritical tower-type boiler is the utility model is related to remove
Grey energy saver.
Background technology
Increasingly strict with energy-saving and emission-reduction standard, the energy-saving and emission-reduction work of Large-scale fire-electricity unit is increasingly taken seriously.Pot
Stove is the nucleus equipment of thermal power station, is one of the key link of thermal power station's energy conversion, the thermal efficiency of boiler directly affects thermoelectricity
The fuel availability stood.Coal-burning boiler is during production run, due to carrying substantial amounts of flue dust in flue gas, can be deposited in low temperature
Heating surface surface forms dust stratification, so as to reduce the heat exchanger effectiveness of heating surface；If reacted in denitration SCR (SCR)
In device, flue dust then can directly block denitrating catalyst passage, cause channel blockage, and denitrating catalyst interlayer pressure difference raises, more
The serious is denitrating catalyst activity can be reduced, denitration efficiency is caused to decline；If in air preheater, due to denitration selectivity
The local spray ammonia of catalysis reduction (SCR) reactor is excessive, ammonia and SO3Generation ammonium hydrogen sulfate is attached to air preheater heat exchange member
Part surface, it is more easy to adsorb the blocking that flue dust causes air preheater, not only reduces the heat exchange efficiency of air preheater, while
The increase of air preheater flue gas resistance, pressure difference rise can be caused.
Blocked to solve boiler economizer, denitration SCR (SCR) reactor and air preheater dust stratification
The problem of, in the prior art, mainly use steam sootblower or acoustic wave ash ejector.
Many insurmountable problems be present in steam sootblower：Blowing pipe is easily caused during operation it is stuck in stove and causes mechanical card
Extremely, fault rate is high, and service life is short, high energy consumption, easy blow loss and trigger pipe explosion accident, gas leak phenomenon is universal；Water capacity in smoke evacuation
Greatly, flue gas dew point is higher；Operating cost is higher, and boiler feedwater and water process are costly, and maintenance and maintenance workload are big；Soot blowing
Degree of filling is low, leaves many dead angles, and stove internal heating surface can be caused to wear.
The technology species of existing acoustic wave ash ejector is more, mostly the type such as resonant cavity, diaphragm, siren, and acoustical power is low, can not
Realize FMAM, soot-blowing mode is fixed during field application, can not be adjusted for slag-blowing equipmemt operating condition, dedusting effect
Difference.
At present, supercritical tower-type boiler contains compared with polybasic salt in flue dust because using high-alkali coal, causes ash fusion point to reduce, save
Coal device dust stratification is serious, and the easily stifled ash of denitration SCR (SCR) reactor denitrating catalyst, air preheater dust stratification blocks
Situation is more serious.The problem of existing can not carry out frequent soot blowing due to steam sootblower and soot blowing is ineffective, so as to cause
The thermal efficiency of supercritical tower-type boiler reduces, and flue gas resistance increase causes blower fan electric current to raise.
The content of the invention
The shortcomings that the purpose of this utility model is to overcome above-mentioned prior art and deficiency, there is provided a kind of overcritical tower
Low-temperature region ash disposal energy saver in formula boiler, solve boiler economizer, denitration SCR (SCR) reactor and sky
The technical problem that air preheater dust stratification blocks.Using the high-strength sound source combination of a variety of Frequency Adjustables, low-temperature space in boiler is respectively arranged in
Domain：Economizer, denitration SCR (SCR) reactor and air preheater, the dust stratification blocking for solving the said equipment are asked
Topic, the heat exchange efficiency of economizer and air preheater is improved, it is online to keep denitration SCR (SCR) reactor denitration
The activity of catalyst, extend its service life, reduce the flue gas resistance of the said equipment, realize energy conservation object.
The technical solution of the utility model is as follows：
Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler, including be sequentially connected with economizer, denitration choosing
Selecting property catalysis reduction (SCR) reactor and air preheater, reacted in the economizer, denitration SCR (SCR)
On device and air preheater, the high-strength sound source of Frequency Adjustable is provided with, the high-strength sound source of the Frequency Adjustable passes through unified control unit control
Sounding processed.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, the high-strength sound source of Frequency Adjustable by
Unified sound source dynamical system provides sound source power, and sound source power can be compressed air.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, in denitration selective catalysis
The high-strength sound source of Frequency Adjustable set on reduction (SCR) reactor and air preheater carries acoustic conducting pipe, and acoustic conducting pipe is set respectively
Inside denitration SCR (SCR) reactor and air preheater.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, what is set on economizer can
The high-strength sound source of frequency modulation is extension type, can carry out telescopic moving in economizer inner space.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, what is set on economizer can
It is 20~600Hz that the high-strength sound source of frequency modulation, which provides frequency of sound wave,.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, denitration selective catalysis is also
It is 20~8000Hz that the high-strength sound source of Frequency Adjustable set on former (SCR) reactor, which provides frequency of sound wave,.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, denitration selective catalysis is also
The high-strength sound source of Frequency Adjustable set on former reactor is included in the high-strength sound source of high frequency Frequency Adjustable or the high-strength sound source of low frequency Frequency Adjustable
One or two kinds of combinations.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, set on air preheater
The high-strength sound source of Frequency Adjustable to provide frequency of sound wave be 20~8000Hz.
Further, low-temperature region ash disposal energy saver in described supercritical tower-type boiler, set on air preheater
The high-strength sound source of Frequency Adjustable include one or two kinds of combinations of the high-strength sound source of high frequency Frequency Adjustable, the high-strength sound source of low frequency Frequency Adjustable.
The utility model provides low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler, the cigarette in tower-type furnace
Gas passes through economizer, denitration SCR (SCR) reactor and air preheater successively in the process of running.Sound wave removes
Ash has concertedness to the trizonal purging, and specific effect is as follows：
The high-strength sound source of Frequency Adjustable of Telescopic movable by being set on economizer provides 20~600Hz ash disposal sound wave,
With movement of the sound source in economizer inner space, ash disposal sound wave realizes the removal to dust stratification inside economizer large space, improves
The heat exchange efficiency of economizer, unit coal consumption amount is reduced, subsequently enters denitration SCR (SCR) reactor so as to reduce
The dust content of equipment；
20 are provided by the high-strength sound source of the Frequency Adjustable being arranged on denitration SCR (SCR) reactor~
8000Hz ash disposal sound wave, it is passed to by acoustic conducting pipe in denitration SCR (SCR) reactor, by ash disposal sound wave de-
Nitre SCR (SCR) reactor flue diffusion inside is propagated, and removes denitrating catalyst surface, the product of the interior attachment of aperture
Ash, extends the service life of denitrating catalyst, improves the activity of denitrating catalyst online, allows reactant fully with taking off
Denox catalyst contacts, and reduces ammonia spraying amount during unit operation, reduces the escaping of ammonia so that by the flue gas of air preheater
Hydrogen sulfate ammonia content is effectively reduced.
20~8000Hz ash disposal, dirty sound wave, warp are provided by the high-strength sound source of the Frequency Adjustable being arranged on air preheater
Cross acoustic conducting pipe to be passed to inside air preheater, sound wave directly acts on heat exchange element surface, removes the dust stratification on heat exchange element surface
Fouling, in the case where hydrogen sulfate ammonia content reduces, the fouling condition of air preheater cold-end air will be improved significantly.
Multiple operation principles are the utility model is related to, it is specific as follows：
Operation principle one：Sound source dynamical system provides working media to the high-strength sound of portable Frequency Adjustable for economizer
Source, control system control the running parameter of the high-strength sound source of Frequency Adjustable, so as to send the ash disposal sound wave of specific frequency and determine row
Enter speed and residence time.
Operation principle two：Sound source dynamical system provides working media and reacted to for denitration SCR (SCR)
The high-strength sound source of the Frequency Adjustable of device and air preheater, control system controls the running parameter of the high-strength sound source of Frequency Adjustable, so as to send
The ash disposal scale removal sound wave of specific frequency.
Operation principle three：The ash disposal scale removal sound wave that the high-strength sound source of Frequency Adjustable provides, it is necessary to pass through exponential type acoustic conducting pipe ability
Ensure that the acoustic wave energy loss of incoming denitration SCR (SCR) reactor and air preheater is minimum, frequency is not sent out
Changing.
Operation principle four：Transmission of the sound wave inside flue, it is real by flue gas and the ash of heating surface surface attachment, dirt
Existing, when ash, dirt are during sound wave is transmitted, it may occur that deformation, it is viscous between black dirt and heating surface metal wall so as to cut down
Attached power, gradually peel off.
Low-temperature region ash disposal energy saver in supercritical tower-type boiler provided by the utility model, economizer is using portable
The high-strength sound source of Frequency Adjustable, the portable high-strength sound source of Frequency Adjustable can be installed with original steam soot blowing hole, according to Frequency Adjustable
The purging scope and shift motion of high-strength sound source determine rational installation site and quantity.The high-strength sound source work of Frequency Adjustable
When, by being analyzed ash content in economizer and being selected soot blowing optimum frequency (frequency range is 20~600Hz).
The high-strength sound source of denitration SCR (SCR) reactor Frequency Adjustable is arranged in above every layer of denitrating catalyst,
The specific installation site of the high-strength sound source of Frequency Adjustable, control system are determined according to denitration SCR (SCR) reactor size
The running parameter of the system control high-strength sound source of Frequency Adjustable, so as to provide the ash disposal scale removal sound wave of corresponding frequencies, frequency of sound wave scope is
20~8000Hz.For the purging effect of the raising high-strength sound source of Frequency Adjustable, the purging side that high and low frequency sound wave can be used to be used alternatingly
Formula.
Separate unit air preheater installs 1~4 high-strength sound source of Frequency Adjustable, and frequency can be adjusted in the range of 20~8000Hz.
Wherein 1~2 hot junction for being installed on fume side, it is the high-strength sound source of high frequency Frequency Adjustable；1~2 cold end for being installed on Secondary Air side,
For the high-strength sound source of low frequency Frequency Adjustable.Under conditions of physical parameter is certain, absorption coefficient and frequency it is square directly proportional, frequency is got over
Low, sound wave is decayed fewer in media as well.Sound wave has diffracting power simultaneously, and the frequency of sound wave is lower, and wavelength is longer, for equal
The barrier (size is less than wavelength) of size, diffracting power is stronger, so the distance of low-frequency sound wave effect is quite far and without dead angle.
And high frequency sound wave, then on the contrary, its action effect in short distance is quite notable, it can make the different material phase inside black dirt
Interreaction force increases and then shows as mutually vibrating, and gradually dismisses black dirt from internal comminution.Pass through the phase interaction of high and low frequency sound wave
With black dirt inside air preheater can be made effectively to be removed.
Low-temperature region ash disposal energy saver in supercritical tower-type boiler provided by the utility model, in supercritical tower-type boiler
Low-temperature region strong sound wave ash disposal energy saver is applied to low-temperature region in supercritical tower-type boiler：Economizer, denitration are selectively urged
Change reduction (SCR) reactor and air preheater, the device forms simple, simple installation, short construction period, sound source dynamical system
User maintenance source of the gas can be directly derived from.Ash disposal, scale removal sound wave will not produce any side effect to heating surface body, and user is transported
Row, which is safeguarded, will not increase any burden, have a extensive future.
The utility model can thoroughly solve the problems, such as the supercritical tower-type boiler economizer dust stratification for using high-alkali coal, solve de-
Nitre SCR (SCR) reactor denitrating catalyst superficial dust problem, solve air preheater and block problem, exclude
Potential safety hazard in boiler operatiopn.
The utility model can ensure the cleaning of heating surface, it is ensured that the heat exchanger such as economizer, air preheater reaches design
Heat exchanger effectiveness, it is ensured that denitration SCR (SCR) reactor denitrating catalyst activity, reduce boiler because of heat exchanger
Surface contamination causes heat exchanger effectiveness to decline and increased fuel consumption, reduces because denitration SCR (SCR) reacts
Device denitrating catalyst activity reduces and increased ammonia spraying amount, saves the energy, it is ensured that NOXEmission compliance.
System structure of device provided by the utility model is compact, and implementation is simple, safe and reliable to operation, has promotion price
Value.
Brief description of the drawings
Fig. 1 is that low-temperature region ash disposal energy saver is illustrated in the supercritical tower-type boiler that the utility model embodiment 1 provides
Figure；
Wherein 1 is the high-strength sound source of the first Frequency Adjustable, and 2 be the high-strength sound source of the second Frequency Adjustable, and 3 be the 3rd high-strength sound of Frequency Adjustable
Source, 4 be the first acoustic conducting pipe, and 5 be the second acoustic conducting pipe, and 6 be control unit, and 7 be sound source dynamical system, and 8 be economizer, and 9 be denitration
SCR (SCR) reactor, 10 be air preheater.
Embodiment：
Embodiment 1
As shown in figure 1, low-temperature region ash disposal energy saver schematic diagram in the supercritical tower-type boiler provided for the present embodiment,
Including the economizer 8, denitration SCR (SCR) reactor 9 and air preheater 10 being sequentially connected with, coal is being saved
The high-strength sound source 1 of the first Frequency Adjustable is provided with device 8, it is adjustable to be provided with second on denitration SCR (SCR) reactor 9
Frequently high-strength sound source 2, is provided with the high-strength sound source 3 of the 3rd Frequency Adjustable on air preheater 10, and the high-strength sound source of above Frequency Adjustable passes through
Unified control unit 6 controls sounding.The high-strength sound source of above Frequency Adjustable provides sound source power by unified sound source dynamical system 7,
Sound source power is the gas with certain pressure.The high-strength sound source 1 of the Frequency Adjustable of the above first, the high-strength sound source 2 of the second Frequency Adjustable and
The high-strength sound source 3 of three Frequency Adjustables controls the generation for carrying out sound wave by control unit 6.The high-strength sound source 2 of second Frequency Adjustable is with the
One acoustic conducting pipe 4, the first acoustic conducting pipe 4 are arranged inside denitration SCR (SCR) reactor 9, and the 3rd Frequency Adjustable is high-strength
Sound source 3 carries the second acoustic conducting pipe 5, and the second acoustic conducting pipe 5 is arranged inside air preheater 10.First set on economizer 8 can
The high-strength sound source 1 of frequency modulation is extension type, can carry out telescopic moving in the inner space of economizer 8.Denitration selective catalysis is also
The high-strength sound source 2 of the second Frequency Adjustable set on former (SCR) reactor 9 can select the high-strength sound source of high frequency Frequency Adjustable or low frequency adjustable
Frequently any one in high-strength sound source or combination.The 3rd Frequency Adjustable set on air preheater 10 is high-strength
Sound source 3 can select in the high-strength sound source of high frequency Frequency Adjustable or the high-strength sound source of low frequency Frequency Adjustable any one or the two
Combination.
Low-temperature region ash disposal energy saver in the supercritical tower-type boiler that the present embodiment provides, can by moveable first
The high-strength sound source 1 of frequency modulation provides the ash disposal sound wave of 20~600Hz frequencies, with movement of the sound source in the inner space of economizer 8, ash disposal
Sound wave realizes the removal to dust stratification inside the large space of economizer 8, improves the heat exchange efficiency of economizer 8, reduces unit coal consumption amount, from
And reduce the dust content for subsequently entering denitration SCR (SCR) reactor apparatus；Selected by being arranged on denitration
The high-strength sound source 2 of the second Frequency Adjustable on selecting property catalysis reduction (SCR) reactor provides 20~8000Hz ash disposal sound wave, by the
One acoustic conducting pipe 4 is passed in denitration SCR (SCR) reactor 9, by ash disposal sound wave in denitration SCR
(SCR) the flue diffusion inside of reactor 9 is propagated, and is removed the dust stratification of denitrating catalyst surface attachment, is extended denitrating catalyst
Service life, reduce ammonia spraying amount during unit operation so that obtain by the sulfureous in flue gas acid hydrogen ammonia content of air preheater
Effectively reduce；20~8000Hz ash disposal, dirt are provided by the high-strength sound source 3 of the 3rd Frequency Adjustable being arranged on air preheater 10
Sound wave, it is passed to by the second acoustic conducting pipe 5 inside air preheater 10, sound wave directly acts on heat exchange element surface, removes heat exchange
The ash deposit and slag buildup of element surface, in the case where hydrogen sulfate ammonia content reduces, the fouling condition of the cold end of air preheater 10 will
Be improved significantly.
Embodiment 2
Below by taking certain power plant 600MW tower-type furnaces installation high-strength sound source of Frequency Adjustable as an example, embodiment is as follows：
The low-temperature region in tower-type furnace：Economizer, denitration SCR (SCR) reactor and air preheater peace
Fill the high-strength sound source of Frequency Adjustable.
Wherein, symmetrically amount to 20 high-strength sound sources of moveable Frequency Adjustable of installation in economizer region both walls and accordingly put down
Platform staircase, during normal operation, the moveable high-strength sound source of Frequency Adjustable provide the sound wave of 20~600Hz frequencies, and pass through transmission
Mechanism passes in and out economizer and carries out efficient soot blowing, ensures the heat exchange efficiency of economizer, reduces unit coal consumption amount, follow-up so as to reduce
Into the dust content of denitration SCR (SCR) reactor apparatus.
Amount in denitration SCR (SCR) reactor front-back wall and the high-strength sound source of 18 Frequency Adjustables and corresponding is installed
Platform staircase.Under normal operation, the sound wave that the high-strength sound source of Frequency Adjustable provides 20~8000Hz is passed sound wave by acoustic conducting pipe
Enter denitration SCR (SCR) inside reactor, remove the dust stratification of denitrating catalyst surface attachment, extend denitration and urge
The service life of agent, reduce ammonia spraying amount during unit operation so that contain by the sulfureous in flue gas acid hydrogen ammonia of air preheater
Amount effectively reduces.
1 high-strength sound source of Frequency Adjustable is respectively installed in every fume side hot junction of two air preheaters and Secondary Air side cold end,
Two air preheaters, which amount to, installs 4 high-strength sound sources of Frequency Adjustable, the high-strength sound source of Frequency Adjustable by acoustic conducting pipe transmission 20~
8000Hz sound wave, sound wave directly act on heat exchange element surface, the ash deposit and slag buildup on heat exchange element surface are removed, in hydrogen sulfate ammonia
In the case that content reduces, the fouling condition of air preheater cold-end air will be improved significantly.
After in-site installation terminates, pilot scale study is carried out, after unit normal operation, the high-strength acoustic source synchronization input fortune of Frequency Adjustable
OK.The stopping state of economizer, denitration SCR (SCR) reactor and air preheater has obtained substantially changing
Kind, heat exchange efficiency significantly improves.
Claims (9)
1. low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler, it is characterised in that including the province's coal being sequentially connected with
Device, denitration scr reactor and air preheater, in the economizer, denitration scr reactor
On air preheater, the high-strength sound source of Frequency Adjustable is provided with, the high-strength sound source of the Frequency Adjustable is controlled by unified control unit
Sounding.
2. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that adjustable
Frequently high-strength sound source provides sound source power by unified sound source dynamical system, and sound source power can be compressed air.
3. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that de-
The Frequency Adjustable sound source set on nitre scr reactor and air preheater carries acoustic conducting pipe, and acoustic conducting pipe is set respectively
It is placed in inside denitration scr reactor and air preheater.
4. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that save coal
The high-strength sound source of Frequency Adjustable set on device is extension type, can carry out telescopic moving in economizer inner space.
5. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that save coal
It is 20 ~ 600Hz that the high-strength sound source of Frequency Adjustable set on device, which provides frequency of sound wave,.
6. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that denitration
It is 20 ~ 8000Hz that the high-strength sound source of Frequency Adjustable set on scr reactor, which provides frequency of sound wave,.
7. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 6, it is characterised in that denitration
The high-strength sound source of Frequency Adjustable set on scr reactor includes the high-strength sound source of high frequency Frequency Adjustable or low frequency Frequency Adjustable
The combination of one or both of high-strength sound source.
8. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 1, it is characterised in that air
It is 20 ~ 8000Hz that the high-strength sound source of Frequency Adjustable set on preheater, which provides frequency of sound wave,.
9. low-temperature region ash disposal energy saver in supercritical tower-type boiler according to claim 8, it is characterised in that air
The high-strength sound source of Frequency Adjustable set on preheater includes one in the high-strength sound source of high frequency Frequency Adjustable or the high-strength sound source of low frequency Frequency Adjustable
Kind or two kinds of combination.
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| CN201720752224.7U CN206875458U (en) | 2017-06-27 | 2017-06-27 | Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler |
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Cited By (1)
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|---|---|---|---|---|
| CN107152692A (en) * | 2017-06-27 | 2017-09-12 | 国网能源哈密煤电有限公司 | Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107152692A (en) * | 2017-06-27 | 2017-09-12 | 国网能源哈密煤电有限公司 | Low-temperature region ash disposal energy saver in a kind of supercritical tower-type boiler |
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| CB03 | Change of inventor or designer information |
Inventor after: Zheng Shaoliang Inventor after: Li Shaohui Inventor after: Chen Peng Inventor after: Zhang Xinliang Inventor after: Zhou Xiaowen Inventor after: He Chao Inventor after: Sun Weiguo Inventor after: Zhu Junju Inventor before: Zheng Shaoliang Inventor before: Li Shaohui Inventor before: Zhang Xinliang Inventor before: Zhou Xiaowen Inventor before: He Chao Inventor before: Sun Weiguo Inventor before: Zhu Junju |