CN208652615U - A kind of air preheater anti-blocking using hot wind high-speed counter-current - Google Patents
A kind of air preheater anti-blocking using hot wind high-speed counter-current Download PDFInfo
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- CN208652615U CN208652615U CN201821241878.4U CN201821241878U CN208652615U CN 208652615 U CN208652615 U CN 208652615U CN 201821241878 U CN201821241878 U CN 201821241878U CN 208652615 U CN208652615 U CN 208652615U
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- 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
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Abstract
The utility model discloses a kind of air preheaters anti-blocking using hot wind high-speed counter-current, including several radial partitions, hot end heat accumulating element, cold end heat accumulating element, hot end radial seal and cold end radial seal, it further include cold end accumulation of heat demarcation plate, cold end seal demarcation plate and the anti-blocking hot bellows of cold end, cold end accumulation of heat demarcation plate is mounted on inside cold end heat accumulating element, it is radially disposed along air preheater rotor, every packet cold end heat accumulating element is divided into two equal portions.The utility model air preheater anti-blocking using hot wind high-speed counter-current, structure is simple, with low investment, economical operation, to the glutinous ash of prevention and treatment sulfuric acid type and the glutinous ash of hydrogen sulfate ammonium type, there is better effects.
Description
Technical field
The utility model relates to a kind of air preheaters anti-blocking using hot wind high-speed counter-current, and it is anti-blocking to belong to air preheater
Gray technology field.
Background technique
Rotary regenerative air preheater (referred to as " air preheater ") is a kind of heat-exchange apparatus for large-sized station boiler,
Air needed for it heats burning using the heat of boiler smoke, the efficiency of boiler is improved with this.
Air preheater focus of attention problem mainly includes stifled ash, air leak rate of air curtain is higher, heat transfer efficiency is low, low-temperature corrosion is tight
Again etc., these problems affect the safe and economical operation of air preheater and entire boiler system for a long time.
The above problem is long-standing, and mutually promotes, influences each other.In recent years, generally putting into operation with denitrating system,
Air preheater running environment changes, and above-mentioned stifled grey problem becomes especially prominent, administers difficult, complicated.
The denitrating flue gas facility that coal-burning power plant adds at present is mainly based on selective catalytic reduction (SCR) technology.Using
Part SO after SCR denitration process, in flue gas2SO will be oxidized to by denitrating catalyst3, increase SO in flue gas3Volume it is dense
, there is inevitable the escaping of ammonia phenomenon in addition, lead to ammonium hydrogen sulfate (NH in degree4HSO4) etc. by-products a large amount of generations, and improve
Flue gas acid dew point temperature, causes low-temperature corrosion to aggravate.
Above-mentioned by-product ammonium hydrogen sulfate (NH4HSO4) temperature be 146~207 DEG C within the scope of, be in molten, can securely glue
It is attached to air preheater heat accumulating element surface, makes heat accumulating element that corrosion and dust stratification occur, it is final easily to cause stifled ash, to the peace of unit
Row for the national games causes very big hidden danger.Existing part power plant, the country leads to unit load limit because can not solve the problems, such as or alleviating this, very
To by forced-stopping machine.
When exhaust gas temperature is lower than acid dew point, sulfuric acid vapor will condense, and sulfuric acid droplets are attached on cold end heat accumulating element, rotten
Lose heat accumulating element.The acid dew point of flue gas is with SO3The raising of concentration and improve, typically up to 130~160 DEG C.Due to denitrating system
Increase SO2To SO3Conversion ratio, that is, improve SO in flue gas3Concentration, and many power plant are control cost of electricity-generating, practical coal
The sulfur of kind is generally higher than design coal, and therefore, the acid dew point of many power plant is higher than exhaust gas temperature at present, leads to low-temperature corrosion
It is quite prominent to block up ash problem for (acid dew piont corrosion) aggravation.
It being determined according to the physical property of above-mentioned sulfuric acid and ammonium hydrogen sulfate, sulfuric acid is mainly deposited on the lower part of cold end heat accumulating element, and
Ammonium hydrogen sulfate is mainly deposited on the middle and upper part of cold end heat accumulating element.Currently, the air preheater scheme anti-blocking using hot wind adverse current
Has application, but since design hot wind flow velocity is lower, heat is mainly transmitted to cold end heat accumulating element, is deposited under cold end heat accumulating element
The glutinous ash of the sulfuric acid type in portion can be removed, and go deep into the glutinous ash of the hydrogen sulfate ammonium type of cold end heat accumulating element middle and upper part, remove effect
Fruit is bad.To find out its cause, when flowing through the ammonium hydrogen sulfate string of deposits, hot wind temperature drop is larger, neither when the flow velocity of anti-blocking hot wind is lower
It is enough the ammonium hydrogen sulfate that gasifies, is not enough to carry the glutinous ash of hydrogen sulfate ammonium type because of reduction of the flow velocity with temperature after also reducing.
Utility model content
In order to solve the stifled grey problem of present air preheater, the utility model provides a kind of anti-blocking using hot wind high-speed counter-current
Air preheater.
In order to solve the above technical problems, technical solution used by the utility model is as follows:
A kind of air preheater anti-blocking using hot wind high-speed counter-current, including rotor, hot end fanning strip and cold end sector plate；
The upper end of rotor is hot end, lower end is cold end, and hot end fanning strip is located at the hot end of rotor, and cold end sector plate is located at the cold of rotor
End；Rotor is equipped with n block radial direction partition, and rotor is divided into n rotor storehouse lattice, constitutes a rotor storehouse per adjacent two radial partitions
Lattice, wherein n >=12；Rotor storehouse the lattice more than middle position of rotor axial length are provided with hot end heat accumulating element, rotor axial
The middle position of length rotor storehouse lattice below are provided with cold end heat accumulating element；The upper edge of radial partition is equipped with hot end radial direction
Sealing element and cooperatively form sealing pair with hot end fanning strip, the lower edge of radial partition be equipped with cold end radial seal and with
Cold end sector plate cooperatively forms sealing pair；It further include the anti-blocking hot bellows of cold end, the anti-blocking hot bellows setting of cold end is cold in rotor cold end
The upper surface of anti-blocking hot wind roof box is held to flush with the upper surface of cold end sector plate, the top plate of the anti-blocking hot bellows of cold end is equipped with heat
Wind snout；
Cold end accumulation of heat demarcation plate, cold end are equipped between the radial partition in the middle position of rotor axial length below adjacent two
Cold end heat accumulating element in the lattice of rotor storehouse is divided into two parts along rotor axial by accumulation of heat demarcation plate；The lower edge of cold end accumulation of heat demarcation plate
Equipped with cold end seal demarcation plate, the top plate of cold end seal demarcation plate and cold end sector plate or the anti-blocking hot bellows of cold end cooperatively forms close
Envelope is secondary；The top plate of cold end radial seal and cold end sector plate or the anti-blocking hot bellows of cold end cooperatively forms sealing pair.
The nouns of locality such as the upper and lower of the application, left and right, top, bottom refer both to opposite position when air preheater normal use
It sets.
As common sense, rotor upper end is hot end, lower end is cold end；Hot end heat accumulating element is in upper, cold end heat accumulating element under；
Radial partition is through rotor axial setting；The cross section of rotor storehouse lattice is fan shape.
When the top plate namely air preheater use state of the anti-blocking hot bellows of cold end, highest is located on the anti-blocking hot bellows of cold end
The composition plate of position, as common sense, a cabinet is spliced by multiple plates that form.
Hot wind source in the anti-blocking hot bellows of cold end at least one of can be First air, Secondary Air or leak out, cold end
Anti-blocking hot bellows are equipped with air inlet, or directly hot wind are introduced into the anti-blocking hot bellows of cold end by pipeline, the anti-blocking hot wind of cold end
Hot wind in case is sprayed from hot air spout forms high-speed jet, realizes to the purging of cold end accumulation of heat original part, and then by glutinous grey gas
Change or takes away.
The application countercurrently refers to that the hot blast flow direction in the anti-blocking hot bellows of cold end is opposite with flue gas flow direction.
Cold end heat accumulating element in the lattice of rotor storehouse is divided into two parts along rotor axial by above-mentioned cold end accumulation of heat demarcation plate, Ye Jileng
Hold accumulation of heat demarcation plate that one rotor storehouse lattice is divided into two points of storehouse lattice, the cross section of point storehouse lattice is also fan shape, that is, cold end stores
Hot demarcation plate is mounted on inside cold end heat accumulating element, and the width direction of cold end accumulation of heat demarcation plate is radially pacified along air preheater rotor
It sets, the short transverse of cold end accumulation of heat demarcation plate is along armature spindle axially setting (similar with the setting of conventional radial partition), and then by one
A rotor storehouse lattice are divided into two points of storehouse lattice.
Above-mentioned cold end seal demarcation plate is similar with cold end radial seal, and radially disposes along air preheater rotor,
Cold end seal demarcation plate and cold end accumulation of heat demarcation plate are in same facade.
Applicant it has been investigated that, by adopting the above technical scheme, ejected from hot air spout on the anti-blocking hot bellows of cold end
Hot wind, followed by the cold end heat accumulating element and hot end heat accumulating element in the lattice of current rotor storehouse, because cold end heat accumulating element is by cold end
Accumulation of heat divides, and have cold end seal demarcation plate and the barrier of cold end radial seal, it can be improved inside cold end heat accumulating element
Local velocity, and then remove the glutinous ash of ammonium hydrogen sulfate of the glutinous ash of the sulfuric acid of cold end heat accumulating element lower part and middle and upper part all.
In order to further increase the cleaning effect to the glutinous ash of hydrogen sulfate ammonium type, the middle position of rotor axial length with
Under, per between adjacent two radial partitions be equipped with one piece of cold end accumulation of heat demarcation plate.
And each cold end seal demarcation plate lower edge is equipped with cold end radial seal, that is, cold end radial seal
Quantity is twice of hot end radial seal quantity.
It is preferred that the middle position of rotor axial length rotor storehouse lattice below are bisected into two phases by cold end accumulation of heat demarcation plate
Same divides storehouse lattice.Namely cold end accumulation of heat demarcation plate is mounted on inside cold end heat accumulating element, and every storehouse cold end heat accumulating element is divided into two
Equal portions.It can preferably guarantee ash-removal effect and sealing effect in this way.
Above-mentioned phase is all that shape is identical, equal in magnitude；The cross section of point storehouse lattice is also fan shape.
In order to further increase the flow velocity of the sprayed hot wind of hot air spout, hot air spout is preferably wedge-shaped hot air spout.
The cross section of the application wedge shape hot air spout is triangle.
In order to further ensure ash-removal effect, wherein one jiao of direction rotor axis of wedge-shaped hot air spout defines this angle
For interior angle, the half of less than the one rotor storehouse lattice angle of angle of interior angle.Further preferably, the angle of interior angle is 1~3 °.
Above-mentioned angle is the angle of the cross section of wedge-shaped hot air spout.
Applicant it has been investigated that, by adopting the above technical scheme, the wedge-shaped hot air spout injection from the anti-blocking hot bellows of cold end
Hot wind out, followed by the cold end heat accumulating element and hot end heat accumulating element in the lattice of current rotor storehouse, because of cold end heat accumulating element quilt
Cold end accumulation of heat divides, and have cold end seal demarcation plate and the barrier of cold end radial seal, cold end heat accumulating element can be improved
Internal local velocity, and flow velocity is still maintained at reduced levels inside the heat accumulating element of hot end.The case where obtaining same blocking-proof result
Under, by adopting the above technical scheme, the flow and pressure of anti-blocking hot wind can all reduce, to save anti-blocking system operation energy consumption.
In order to guarantee the hot wind for anti-blocking ash not with cold secondary air flow mixing, the fan-shaped cabinet of the above-mentioned anti-blocking hot bellows of cold end
Structure, the top plate of the anti-blocking hot bellows of cold end are fanning strip.
In order to improve the heat exchange efficiency of air preheater, the central angle of the anti-blocking hot wind roof box of cold end is greater than a rotor storehouse
Less than two rotor storehouse lattice angles of lattice angle guarantee that there is the top of two groups of diaphragm seals Yu the anti-blocking hot bellows of cold end in rotor any time
Plate forms sealing cooperation.
The central angle of the application is consistent with central angle concept fan-shaped in existing concept.
In order to avoid hot wind leakage, the anti-blocking hot bellows of cold end are located at rotor cold end and fan with First air/Secondary Air side cold end
Shape plate is adjacent.
As common sense, general air preheater rotor includes at least three points of storehouses: a flue gas Fen Cang, a First air point
Storehouse and a secondary air separating storehouse, each point storehouse is made of a certain number of rotor storehouses lattice, First air/Secondary Air side namely one
The separation of secondary wind and Secondary Air, First air/Secondary Air side cold end sector plate namely with First air/Secondary Air side face cold end
Fanning strip is the expression of this field specification.
Applicant it has been investigated that, the anti-blocking hot bellows of cold end are placed on and rotor cold end First air/Secondary Air cold end fans
The adjacent position of shape plate, rather than it is adjacent with fume side, it can avoid that the problem of cold end hot wind is leaked to fume side occurs, to control
Therefore average exhaust gas temperature does not rise, ensure that boiler efficiency is unaffected.
It is further preferred that the anti-blocking hot bellows of cold end be located at the underface in the secondary air separating storehouse of rotor cold end and with First air/secondary
Wind side cold end sector plate is adjacent.
Hot wind in the anti-blocking hot bellows of cold end can be derived from during heat primary air main pipe, hot Secondary Air main pipe or hot end leak out
It is at least one, it is preferable that further include taking out the machine that leaks out, taking out to leak out and completely cut off door, heat using the air preheater that hot wind high-speed counter-current is anti-blocking
Secondary Air branch Men He general pipeline；The middle position of fume side hot end fanning strip, which is equipped with, takes out the entrance that leaks out；The one end general pipeline and heat are secondary
The connection of wind main pipe, the other end branch into the first branch and second branch；Wherein, the first branch leads to pumping and leaks out entrance, and second
The anti-blocking hot bellows of cold end are led on road；Hot Secondary Air branch door is located on the general pipeline before branch；Pumping, which is leaked out, to be completely cut off door and is located at first
On the road；The pumping machine that leaks out is located in second branch.
As common sense, fume side hot end fanning strip namely hot end of rotor and flue gas divide the fanning strip of storehouse face.
Heat primary air main pipe, hot Secondary Air mother etc. are the conventional conception in existing air preheater field, and the application is to very
Mature prior art part repeats no more.
The first branch leads to that pumping leaks out entrance namely first branch one end separates from general pipeline, is connected to general pipeline, the other end into
Enter pumping leak out entrance, extract leak out.Second branch leads to the anti-blocking hot bellows of cold end namely second branch one end is separated from general pipeline,
It is connected to general pipeline, the other end enters the anti-blocking hot bellows of cold end, provides hot wind for the anti-blocking hot bellows of cold end.
The above-mentioned wind regime for collecting and taking away as anti-blocking ash system that leaks out by the fanning strip of hot end is solving air preheater
While stifled ash problem, air preheater air leakage problem can also be administered.
The hot wind of above-mentioned pumping leakage fans entrance is mentioned by leaking out for fume side hot end fanning strip extraction under normal operating conditions
For providing supplement wind regime by hot Secondary Air main pipe when the inleakage deficiency of extraction.
When air preheater is there is no grey risk is blocked up, above-mentioned pumping, which is leaked out, completely cuts off door closing, and hot Secondary Air branch door is closed,
Pumping leak out machine stoppage in transit, in this operating mode, it is out of service to be equivalent to anti-blocking system；When air preheater has stifled grey risk
When, it opens to take out to leak out and completely cuts off door, opens to take out and leak out machine, the pumping machine that leaks out from the pumping of the fume side hot end fanning strip entrance that leaks out extracts leakage
Wind is sent after pressurization to the anti-blocking hot bellows of cold end of cold end；If unit load is lower, when the inleakage deficiency of extraction, heat two is opened
Secondary wind branch door supplements hot Secondary Air into the anti-blocking hot bellows of cold end；In this operating mode, 300 DEG C or so of leakage of extraction
Wind and/or hot Secondary Air are sprayed from the air nozzle of the anti-blocking hot bellows fanning strip of cold end, form the Gas Jet of high temperature, high flow rate,
Purging heat accumulating element upwards, establishes localized hyperthermia, high-flow area inside air preheater rotor, makes to be deposited on accumulation of heat member
The acid dust stratification on part surface becomes loosely, to carry and removed under the action of high flow rate；Since air preheater rotor is continuous
Rotation, heat accumulating element obtains primary complete purging for each revolution, and avoiding dust stratification aggravation leads to stifled ash.
The unmentioned technology of the utility model is referring to the prior art.
The utility model air preheater anti-blocking including the use of hot wind high-speed counter-current, has the following beneficial effects: structure
Simply, with low investment, economical operation has better effects to the glutinous ash of prevention and treatment sulfuric acid type and the glutinous ash of hydrogen sulfate ammonium type.
Detailed description of the invention
Fig. 1 is the circumferentially deploying structure feature figure using the anti-blocking air preheater of hot wind high-speed counter-current.
In figure, 1 is radial partition, and 2 be hot end heat accumulating element, and 3 be cold end heat accumulating element, and 4 be hot end radial seal, 5
It is cold end accumulation of heat demarcation plate for cold end radial seal, 6,7 be cold end seal demarcation plate, and 8 be the anti-blocking hot bellows of cold end, and 9 be wedge
Shape hot air spout, 10 be hot end fanning strip, and 11 be cold end sector plate.
Specific embodiment
The utility model in order to better understand furthers elucidate the content of the utility model below with reference to embodiment, but
The content of the utility model is not limited solely to the following examples.
Embodiment 1
300MW unit air preheater, including rotor, hot end fanning strip, cold end sector plate and the anti-blocking hot bellows of cold end；Turn
The upper end of son is hot end, lower end is cold end, and hot end fanning strip is located at the hot end of rotor, and cold end sector plate is located at the cold end of rotor；
Rotor is equipped with 36 pieces of radial partitions, and rotor is divided into 36 rotor storehouse lattice, constitutes a rotor storehouse per adjacent two radial partitions
Lattice, each rotor storehouse lattice angle are 10 °；Rotor storehouse the lattice more than middle position of rotor axial length are provided with hot end accumulation of heat member
Part, the middle position of rotor axial length rotor storehouse lattice below are provided with cold end heat accumulating element；Pacify the upper edge of radial partition
Sealing pair is cooperatively formed equipped with hot end radial seal and with hot end fanning strip, the lower edge of radial partition is equipped with cold end diameter
Sealing pair is cooperatively formed to sealing element and with cold end sector plate；
The fan-shaped body structure of the anti-blocking hot bellows of cold end, the top plate of the anti-blocking hot bellows of cold end are that central angle is greater than a rotor
The fanning strip of less than two rotor storehouse lattice angles of storehouse lattice angle；The anti-blocking hot bellows of cold end are arranged in rotor cold end, the anti-blocking heat of cold end
The upper surface of bellows top plate is flushed with the upper surface of cold end sector plate, and the top plate of the anti-blocking hot bellows of cold end is equipped with wedge shape or triangle
Shape hot air spout；This angle is defined as interior angle by wherein one jiao of direction rotor axis of hot air spout, and the angle of interior angle is 2.2.
It is equipped with cold end accumulation of heat demarcation plate below the middle position of rotor axial length, per between adjacent two radial partitions, it is cold
Hold accumulation of heat demarcation plate that the middle position of rotor axial length rotor storehouse lattice below are bisected into two identical point of storehouse lattice, simultaneously
Cold end heat accumulating element in the lattice of rotor storehouse is also bisected into two parts along rotor axial；The lower edge of cold end accumulation of heat demarcation plate is equipped with cold
The top plate of sealed separation plate, cold end seal demarcation plate and cold end sector plate or the anti-blocking hot bellows of cold end is held to cooperatively form sealing pair；
The top plate of cold end radial seal and cold end sector plate or the anti-blocking hot bellows of cold end cooperatively forms sealing pair.
Hot wind source in the above-mentioned anti-blocking hot bellows of cold end at least one of can be First air, Secondary Air or leak out,
The anti-blocking hot bellows of cold end are equipped with air inlet, or directly hot wind is introduced into the anti-blocking hot bellows of cold end by pipeline, and cold end is anti-blocking
Hot wind in hot bellows is sprayed from hot air spout forms high-speed jet, realizes the purging to cold end accumulation of heat original part, and then will stick
Ash gasification is taken away.
It was verified that by adopting the above technical scheme, from the hot wind that hot air spout ejects on the anti-blocking hot bellows of cold end, because cold
It holds heat accumulating element by cold end accumulation of heat divides, and has cold end seal demarcation plate and the barrier of cold end radial seal, can be improved
Local velocity inside cold end heat accumulating element, and then keep the ammonium hydrogen sulfate of the glutinous ash of the sulfuric acid of cold end heat accumulating element lower part and middle and upper part glutinous
Ash is all removed.
Embodiment 2
It is substantially the same manner as Example 1, except that: use 600MW unit air preheater, 48 points of chamber structures, each
Rotor storehouse lattice angle is 7.5 °, and the wedge-shaped hot air spout of the anti-blocking hot bellows of cold end is 1.8 °.
It was verified that in the case where obtaining same blocking-proof result, by adopting the above technical scheme, the flow of anti-blocking hot wind and
Pressure can all reduce, to save anti-blocking system operation energy consumption.
Embodiment 3
It is substantially the same manner as Example 1, except that: the anti-blocking hot bellows of cold end are located at the secondary air separating storehouse of rotor cold end
Underface and adjacent with First air/Secondary Air side cold end sector plate.
It was verified that the anti-blocking hot bellows of cold end are placed on adjacent with rotor cold end First air/Secondary Air cold end sector plate
Position, rather than it is adjacent with fume side, can avoid that the problem of cold end hot wind is leaked to fume side occurs, thus the average smoke evacuation of control
Therefore temperature does not rise, ensure that boiler efficiency is unaffected.
Embodiment 4
It is substantially the same manner as Example 1, except that: air preheater further includes taking out the machine that leaks out, taking out and leak out and completely cut off door, heat
Secondary Air branch Men He general pipeline；The middle position of fume side hot end fanning strip, which is equipped with, takes out the entrance that leaks out；The one end general pipeline and heat are secondary
The connection of wind main pipe, the other end branch into the first branch and second branch；Wherein, the first branch leads to pumping and leaks out entrance, and second
The anti-blocking hot bellows of cold end are led on road；Hot Secondary Air branch door is located on the general pipeline before branch；Pumping, which is leaked out, to be completely cut off door and is located at first
On the road；The pumping machine that leaks out is located in second branch.
The above-mentioned wind regime for collecting and taking away as anti-blocking ash system that leaks out by the fanning strip of hot end is solving air preheater
While stifled ash problem, air preheater air leakage problem can also be administered.
The hot wind of above-mentioned pumping leakage fans entrance is mentioned by leaking out for fume side hot end fanning strip extraction under normal operating conditions
For providing supplement wind regime by hot Secondary Air main pipe when the inleakage deficiency of extraction.
When air preheater is there is no grey risk is blocked up, above-mentioned pumping, which is leaked out, completely cuts off door closing, and hot Secondary Air branch door is closed,
Pumping leak out machine stoppage in transit, in this operating mode, it is out of service to be equivalent to anti-blocking system；When air preheater has stifled grey risk
When, it opens to take out to leak out and completely cuts off door, opens to take out and leak out machine, the pumping machine that leaks out from the pumping of the fume side hot end fanning strip entrance that leaks out extracts leakage
Wind is sent after pressurization to the anti-blocking hot bellows of cold end of cold end；If unit load is lower, when the inleakage deficiency of extraction, heat two is opened
Secondary wind branch door supplements hot Secondary Air into the anti-blocking hot bellows of cold end；In this operating mode, 300 DEG C or so of leakage of extraction
Wind and/or hot Secondary Air are sprayed from the air nozzle of the anti-blocking hot bellows fanning strip of cold end, form the Gas Jet of high temperature, high flow rate,
Purging heat accumulating element upwards, establishes localized hyperthermia, high-flow area inside air preheater rotor, makes to be deposited on accumulation of heat member
The acid dust stratification on part surface becomes loosely, to carry and removed under the action of high flow rate；Since air preheater rotor is continuous
Rotation, heat accumulating element obtains primary complete purging for each revolution, and avoiding dust stratification aggravation leads to stifled ash.
Facts have proved: the concentration of the acid gas-containing that leaks out of the hot wind or fume side of hot Secondary Air main pipe is minimum, favorably
In the gasification of sulfuric acid and ammonium hydrogen sulfate；It is leaked out anti-blocking design using pumping, the pressure of leaking out extracted from fume side hot end fanning strip exists
1kPa or so, pumping leak out compressing head in 4kPa or so, it is ensured that from heat primary air and hot Secondary Air in air preheater hot end sector
Leaking out at plate can all be taken away by the pumping machine that leaks out, and the hot wind leakage rate of fume side is reduced；It is leaked out anti-blocking design, is taken out using pumping
The position for the hot Secondary Air that the machine that leaks out is extracted is unrestricted, can be adjusted flexibly according to site space, and the arrangement in air duct is more held
Easily, and air preheater is without change, and project amount is small.
Claims (8)
1. a kind of air preheater anti-blocking using hot wind high-speed counter-current, including rotor, hot end fanning strip and cold end sector plate；Turn
The upper end of son is hot end, lower end is cold end, and hot end fanning strip is located at the hot end of rotor, and cold end sector plate is located at the cold end of rotor；
Rotor is equipped with n block radial direction partition, and rotor is divided into n rotor storehouse lattice, constitutes a rotor storehouse lattice per adjacent two radial partitions,
Wherein, n >=12；Rotor storehouse the lattice more than middle position of rotor axial length are provided with hot end heat accumulating element, and rotor axial is long
The middle position of degree rotor storehouse lattice below are provided with cold end heat accumulating element；It is radially close that the upper edge of radial partition is equipped with hot end
Sealing and cooperatively form sealing pair with hot end fanning strip, the lower edge of radial partition be equipped with cold end radial seal and with it is cold
End fanning strip cooperatively forms sealing pair；It is characterized by also including the anti-blocking hot bellows of cold end, the anti-blocking hot bellows setting of cold end is turning
The upper surface of sub- cold end, the anti-blocking hot wind roof box of cold end is flushed with the upper surface of cold end sector plate, the top of the anti-blocking hot bellows of cold end
Plate is equipped with hot air spout；
Cold end accumulation of heat demarcation plate, cold end accumulation of heat are equipped between the radial partition in the middle position of rotor axial length below adjacent two
Cold end heat accumulating element in the lattice of rotor storehouse is divided into two parts along rotor axial by demarcation plate；The lower edge of cold end accumulation of heat demarcation plate is equipped with
The top plate of cold end seal demarcation plate, cold end seal demarcation plate and cold end sector plate or the anti-blocking hot bellows of cold end cooperatively forms sealing
It is secondary；The top plate of cold end radial seal and cold end sector plate or the anti-blocking hot bellows of cold end cooperatively forms sealing pair.
2. the air preheater anti-blocking using hot wind high-speed counter-current as described in claim 1, it is characterised in that: rotor axial is long
One piece of cold end accumulation of heat demarcation plate is equipped with below the middle position of degree, per between adjacent two radial partitions.
3. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 1 or 2, it is characterised in that: cold end stores
The middle position of rotor axial length rotor storehouse lattice below are bisected into two identical point of storehouse lattice by hot demarcation plate.
4. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 1 or 2, it is characterised in that: cold end is anti-
The top plate of stifled hot bellows is equipped with wedge-shaped hot air spout.
5. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 4, it is characterised in that: wedge-shaped hot wind spray
Mouthful wherein one jiao of direction rotor axis, this angle is defined as interior angle, the one of less than the one rotor storehouse lattice angle of angle of interior angle
Half.
6. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 5, it is characterised in that: the angle of interior angle
It is 1~3 °.
7. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 1 or 2, it is characterised in that: cold end is anti-
The top plate of stifled hot bellows is fanning strip.
8. the air preheater anti-blocking using hot wind high-speed counter-current as claimed in claim 1 or 2, it is characterised in that: anti-blocking ash
The central angle of bellows top plate is greater than less than two rotor storehouse lattice angles of a rotor storehouse lattice angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821241878.4U CN208652615U (en) | 2018-08-03 | 2018-08-03 | A kind of air preheater anti-blocking using hot wind high-speed counter-current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110017499A (en) * | 2019-04-04 | 2019-07-16 | 国家电投集团电站运营技术（北京）有限公司 | A kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110017499A (en) * | 2019-04-04 | 2019-07-16 | 国家电投集团电站运营技术（北京）有限公司 | A kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking |
| CN110017499B (en) * | 2019-04-04 | 2020-03-31 | 国家电投集团电站运营技术（北京）有限公司 | Method for preventing blockage of cold-end heat storage element of air preheater in ring-dividing manner |
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