CN110017499A - A kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking - Google Patents
A kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking Download PDFInfo
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- CN110017499A CN110017499A CN201910268427.2A CN201910268427A CN110017499A CN 110017499 A CN110017499 A CN 110017499A CN 201910268427 A CN201910268427 A CN 201910268427A CN 110017499 A CN110017499 A CN 110017499A
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- 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
- F23L15/02—Arrangements of regenerators
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a kind of methods that air preheater cold-end air heat accumulating element divides ring anti-blocking, in air preheater rotor cold end end face, partition is set, cold end end face is divided into more than two independent air intake passages, it is anti-blocking to purge each air intake passage progress respectively using anti-blocking grey hot wind.The present invention is leaked out by reducing anti-blocking grey hot wind passage section of same period and reducing the inorganization in anti-blocking ash content storehouse, achieve the purpose that reduce anti-blocking grey hot wind dosage under the premise of guarantee air preheater anti-blocking grey effect, there are the outstanding advantages such as with low investment, operating cost is low, blocking-proof result is significant.
Description
Technical field
The present invention relates to a kind of methods that air preheater cold-end air heat accumulating element divides ring anti-blocking, 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
Have an application, but since available anti-blocking grey hot air flow is limited, when passage section is larger anti-blocking ash hot wind flow velocity with regard to lower,
Heat is mainly transmitted to cold end heat accumulating element, though the glutinous ash of sulfuric acid type is removed, gos deep into the hydrogen sulfate of heat accumulating element middle and upper part
The glutinous ash of ammonium type, elimination effect are bad.To find out its cause, flowing through the ammonium hydrogen sulfate string of deposits when flow velocity of anti-blocking ash hot wind is lower
Hot wind temperature drop is larger, is both not enough to the ammonium hydrogen sulfate that gasifies, and is not enough to carry the glutinous ash of hydrogen sulfate ammonium type because of flow velocity after also reducing；This
Outside, cold end heat accumulating element runner not can guarantee completely enclosed, after the anti-blocking grey hot wind of high local flow velocities blows into heat accumulating element, cold
Diffusion inside heat accumulating element is held, the whole high flow condition of holding can not be penetrated through.
Summary of the invention
In order to solve the stifled grey problem of present air preheater, the effect of the anti-blocking ash of hot wind adverse current is improved, the present invention provides one
The method that kind air preheater cold-end air heat accumulating element divides ring anti-blocking.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
A kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking is arranged in air preheater rotor cold end end face
Cold end end face is divided into the independent air intake passage of two or more by partition, purges each air inlet respectively using anti-blocking grey hot wind
Channel carries out anti-blocking.
As common sense, air preheater rotor one end is cold end, the other end is hot end, ordinary circumstance, cold end is under, heat
Upper, the application is repeated no more at end.
Partition is set in air preheater rotor cold end end face, cold end end face is divided into the independent air inlet of two or more
Channel, namely using the setting of air preheater rotor cold end end face partition cold end end face be divided into it is more than two it is independent into
Wind channel.
The anti-blocking grey hot wind of the application may be derived from heat primary air or hot Secondary Air and/or hot end is leaked out.It is anti-blocking ash hot wind from (turn
Son) cold end entrance, it is flowed out from (rotor) hot end, purges the heat accumulating element flowed through.
Using the above scheme, the divergence loss for effectively preventing anti-blocking grey hot wind farthest ensure that anti-blocking ash heat
The high flow condition of wind whole process, significantly improves the elimination effect to substances such as sulfuric acid and ammonium hydrogen sulfates.
It is preferred that being equipped with the anti-blocking grey air compartment being individually connected to it on each air intake passage, anti-blocking grey air compartment is utilized
Interior anti-blocking its corresponding air intake passage of grey hot-air blowing carries out anti-blocking.
The anti-blocking grey air compartment being individually connected to it, i.e. an air intake passage corresponding one are equipped on each air intake passage
A anti-blocking grey air compartment, it is anti-blocking that the anti-blocking indoor anti-blocking grey hot wind of ash wind purges its corresponding air intake passage progress from bottom to top.
Applicant it has been investigated that, by adopting the above technical scheme, in the case where guaranteeing the anti-blocking grey effect of air preheater,
Anti-blocking grey hot wind dosage can be greatly decreased, to save the energy consumption of anti-blocking grey hot wind conveying, also reduce the anti-blocking ash heat of cold end input
Adverse effect of the wind to air preheater heat exchange property.
In order to simplify structure, while guaranteeing blocking-proof result, the upstream of all anti-blocking grey air compartments merges in same anti-
In stifled ash bellows, carried out using each air intake passage of anti-blocking grey hot wind taking turn purging in anti-blocking grey bellows anti-blocking.Namely it is same
Period is only passed through anti-blocking its corresponding air intake passage of grey hot-air blowing in an anti-blocking grey air compartment.Certainly, no matter purge that into
Wind channel can all first pass through corresponding anti-blocking grey air compartment.
The flow direction of anti-blocking grey hot wind in the direction namely anti-blocking grey air compartment in downstream is swum over on anti-blocking ash air compartment.
In order to facilitate controlling and adjusting, anti-blocking hot wind is equipped on each anti-blocking grey air compartment and adjusts door, passes through actuator list
Solely adjust each anti-blocking grey indoor anti-blocking grey hot blast rate of wind of control.Accumulation of heat member when taking turn purging, in each air intake passage
Part cold end taking turn is purged using anti-blocking grey hot wind, the same period, is only passed through anti-blocking grey hot wind in an anti-blocking grey air compartment, and
Anti-blocking hot wind corresponding to other anti-blocking grey air compartments adjusts door and completely closes.
In order to facilitate control, it is ensured that blocking-proof result, partition are the circumferential partition of circular ring structure, and circumferential partition has the road n, cold
End end face is divided into n+1 independent circular air inlet channels.
Further preferably, it is a independent to be virtually divided into n+1 by the concentric setting of all circumferential partitions for cold end end face
Concentric ring air intake passage.Further preferably, 1≤n≤5.The application " concentric " namely concentric.
To improve the utilization efficiency of anti-blocking grey hot wind, reducing anti-blocking ash content storehouse cold end slip, at least ring in most outer ring
The intermediate radial partition that the rotor cold end end face setting of shape air intake passage is connect with circumferential partition.Intermediate radial partition is along rotor diameter
To setting.Using abovementioned technology, when mushroom deformation occurs for air preheater rotor, cold end outer ring radially leaks out can be big
Width is reduced, and on the one hand advantageously reduces air leak rate of air preheater, the inorganization on the other hand reducing anti-blocking ash content storehouse is leaked out.
Further preferably, the corresponding intermediate radial partition of each rotor storehouse lattice, intermediate radial partition is along its corresponding turn
The angular bisector of sub- storehouse lattice is arranged.
As common sense, rotor is equipped with n block radial direction partition, rotor is divided into n rotor storehouse lattice, per adjacent two radial partitions
A rotor storehouse lattice are constituted, heat accumulating element is installed in the lattice of rotor storehouse, and the application repeats no more.
To further increase the utilization efficiency of anti-blocking grey hot wind, reducing anti-blocking ash content storehouse cold end slip, above-mentioned circumferential direction every
It is equipped on plate on circumferential seal piece and/or intermediate radial partition and intermediate radial diaphragm seal is installed.
In order to simplify structure, guarantees blocking-proof result, facilitate control, be equipped with one and its list on each circular air inlet channel
The anti-blocking grey air compartment being solely connected to, the upstream of all anti-blocking grey air compartments merges in the same anti-blocking grey bellows, each anti-blocking
It is equipped with anti-blocking hot wind on grey air compartment and adjusts door, purges each air intake passage using the anti-blocking grey hot wind taking turn in anti-blocking grey bellows
It carries out anti-blocking.
The method that above-mentioned air preheater cold-end air heat accumulating element divides ring anti-blocking, in the anti-blocking grey wind of air preheater cold-end air setting
Case is passed through anti-blocking grey hot wind in anti-blocking ash bellows, and anti-blocking ash hot-air blowing air preheater rotor cold end end face constructs anti-blocking ash
Divide storehouse, anti-blocking ash bellows are made of n+1 anti-blocking grey air compartments, and the corresponding anti-blocking grey air compartment of every ring heat accumulating element cold end is independent
Connection；The anti-blocking grey hot blast rate that each anti-blocking grey air compartment is passed through, which adjusts door by anti-blocking hot wind, can individually adjust control.
As published technical solution, above-mentioned anti-blocking grey hot wind is derived from heat primary air or hot Secondary Air and/or hot end leakage
Wind, anti-blocking ash bellows are mounted below air preheater rotor cold end end face.
It puts into operation level to improve equipment automatization, all anti-blocking hot winds adjust door (n+1) and install pneumatically or electrically
Executing agency, according to the interval time of program-controlled setting, automatic taking turn opens one of them anti-blocking hot wind and adjusts door, and keeps it
Its anti-blocking hot wind adjusts door and closes.
In order to debug convenient and monitoring device operating status, it is equipped in the anti-blocking grey bellows of all anti-blocking grey air compartment upstreams
One anti-blocking grey hot air flow meter.Namely the anti-blocking grey hot blast rate that is passed through of each anti-blocking grey air compartment by share a flowmeter into
Row monitoring.
To monitor the anti-blocking effect of each ring of air preheater cold-end air heat accumulating element respectively, above-mentioned every ring heat accumulating element hot end,
Corresponding anti-blocking ash content storehouse outlet port, is arranged at least one anti-blocking grey hot wind sample tap, and taking-up has flowed through the anti-blocking of heat accumulating element
Grey hot wind, its dust concentration of on-line measurement.The Dust Capacity being carried out in the unit area of above-mentioned heat accumulating element cold end end face is more,
Illustrate that the stifled ash tendency of heat accumulating element that anti-blocking grey hot wind is purged is more obvious；It is passed through in some anti-blocking grey air compartment when increase anti-
When stifled ash hot blast rate, above-mentioned monitoring dust concentration decline then illustrates that a corresponding anti-blocking ash of ring heat accumulating element works well, before increase
Anti-blocking grey hot blast rate be best air quantity in one ring heat accumulating element of correspondence.
The application air intake passage hot end, heat accumulating element hot end etc., equal respective rotor hot end；Air intake passage cold end, accumulation of heat member
Part cold end etc., equal respective rotor cold end.
The unmentioned technology of the present invention is referring to the prior art.
The method that air preheater cold-end air heat accumulating element of the present invention divides ring anti-blocking, has the following beneficial effects: and passes through reduction
Anti-blocking grey hot wind passage section of same period and the inorganization for reducing anti-blocking ash content storehouse are leaked out, and are reached and are being guaranteed air preheater
The purpose that anti-blocking grey hot wind dosage is reduced under the premise of anti-blocking ash effect, has with low investment, operating cost is low, blocking-proof result is significant etc.
Outstanding advantage.
Detailed description of the invention
Fig. 1 is the method that 300MW grade unit air preheater cold-end air heat accumulating element divides ring anti-blocking in the embodiment of the present invention 1
Schematic diagram.
Fig. 2 is that air preheater rotor cold end end face separates schematic diagram in the embodiment of the present invention 1.
Fig. 3 is the method that 600MW grade unit air preheater cold-end air heat accumulating element divides ring anti-blocking in the embodiment of the present invention 3
Schematic diagram.
Fig. 4 is that air preheater rotor cold end end face separates schematic diagram in the embodiment of the present invention 3.
In figure, 1 is the first circumferential partition, and 2 be the second circumferential partition, and 3 be intermediate radial partition, and 4 be anti-blocking grey hot air flow
Meter；11 be the first anti-blocking grey air compartment, and 12 be the second anti-blocking grey air compartment, and 13 be the anti-blocking grey air compartment of third；21 be the first anti-blocking heat
Wind adjusts door, and 22 adjust door for the second anti-blocking hot wind, and 23 adjust door for the anti-blocking hot wind of third.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
Embodiment 1
As shown in Figs. 1-2, a kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking, in 300MW grade unit
The first circumferential partition of 1 circular ring structure is arranged in air preheater rotor cold end end face, cold end end face be divided into 2 it is independent
Concentric circular air inlet channel, to improve the utilization efficiency of anti-blocking grey hot wind, reducing anti-blocking ash content storehouse cold end slip, outermost
The intermediate radial partition that the rotor cold end end face setting in the circular air inlet channel of ring is connect with circumferential partition, each rotor storehouse lattice pair
An intermediate radial partition is answered, intermediate radial partition is arranged along the angular bisector of its corresponding rotor storehouse lattice, using above-mentioned technology
Measure, when mushroom deformation occurs for air preheater rotor, cold end outer ring, which radially leaks out, to be greatly decreased, and be on the one hand conducive to
Air leak rate of air preheater is reduced, the inorganization on the other hand reducing anti-blocking ash content storehouse is leaked out；On each circular air inlet channel
The anti-blocking grey air compartment being individually connected to equipped with one with it, namely have 2 anti-blocking grey air compartments, be respectively the first anti-blocking grey air compartment and the
The upstream of two anti-blocking grey air compartments, the first anti-blocking grey air compartment and the second anti-blocking grey air compartment merges in the same anti-blocking grey bellows,
First anti-blocking grey air compartment is equipped with the first anti-blocking hot wind and adjusts door, and the second anti-blocking grey air compartment is equipped with the second anti-blocking hot wind and adjusts door, benefit
Pass through the first anti-blocking grey air compartment respectively with the anti-blocking grey hot wind in anti-blocking grey bellows and the second anti-blocking grey air compartment taking turn purges 2 solely
Vertical concentric circular air inlet channel namely same period, being only passed through anti-blocking grey hot-air blowing in an anti-blocking grey air compartment, its is right
The air intake passage answered, and anti-blocking hot wind corresponding to another anti-blocking grey air compartment adjusts door and completely closes.
Above-mentioned anti-blocking grey hot wind may be derived from heat primary air or hot Secondary Air and/or hot end is leaked out.
Using the above scheme, the divergence loss for effectively preventing anti-blocking grey hot wind farthest ensure that anti-blocking ash heat
The high flow condition of wind whole process, significantly improves the elimination effect to substances such as sulfuric acid and ammonium hydrogen sulfates.
It has been proved by practice that by adopting the above technical scheme, in the case where guarantee air preheater anti-blocking grey effect, can reduce
30%~50% anti-blocking grey hot wind dosage also reduces cold end and inputs anti-blocking ash to save the energy consumption of anti-blocking grey hot wind conveying
Adverse effect of the hot wind to air preheater heat exchange property.
Embodiment 2
On the basis of embodiment 1, following improvement has further been made: having been imitated to further increase anti-blocking utilizing for grey hot wind
Rate reduces anti-blocking ash content storehouse cold end slip, is equipped with circumferential seal piece on above-mentioned circumferential direction partition, is equipped on radial partition
Intermediate radial diaphragm seal.
Embodiment 3
As shown in Figure 3-4, a kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking, in 600MW grade unit
(the respectively first circumferential partition and second is circumferentially for the circumferential partition of 2 circular ring structures of air preheater rotor cold end end face setting
Partition), cold end end face is divided into 3 independent concentric circular air inlet channels；One is equipped on each circular air inlet channel
A anti-blocking grey air compartment being individually connected to it, namely have 3 anti-blocking grey air compartments, be respectively the first anti-blocking grey air compartment, second anti-blocking
Grey air compartment and the anti-blocking grey air compartment of third, the upstream of the first anti-blocking grey air compartment, the second anti-blocking grey air compartment and the anti-blocking grey air compartment of third are equal
It merges in the same anti-blocking grey bellows, an anti-blocking grey hot air flow meter, the first anti-blocking grey air compartment is equipped in anti-blocking ash bellows
Door is adjusted equipped with the first anti-blocking hot wind, the second anti-blocking grey air compartment is equipped with the second anti-blocking hot wind and adjusts door, and the anti-blocking grey air compartment of third is set
There is the anti-blocking hot wind of third to adjust door, passes through 3 anti-blocking grey air compartment taking turns respectively using the anti-blocking grey hot wind in anti-blocking grey bellows and blow
3 independent concentric circular air inlet channels namely same period are swept, only anti-blocking grey hot wind is passed through in an anti-blocking grey air compartment and blows
Its corresponding air intake passage is swept, and anti-blocking hot wind corresponding to the anti-blocking grey air compartment of another two adjusts door and completely closes.
Above-mentioned anti-blocking grey hot wind may be derived from heat primary air or hot Secondary Air and/or hot end is leaked out.
It has been proved by practice that by adopting the above technical scheme, it, can be substantially in the case where guarantee air preheater anti-blocking grey effect
It reduces by 40% or so anti-blocking grey hot wind dosages, to save the energy consumption of anti-blocking grey hot wind conveying, also reduces cold end and input anti-blocking ash
Adverse effect of the hot wind to air preheater heat exchange property.
Embodiment 4
On the basis of embodiment 3, following improvement is further made: having put into operation level to improve equipment automatization, 3 anti-blocking
Hot wind adjusts door and installs pneumatically or electrically executing agency, and according to the interval time of program-controlled setting, automatic taking turn is opened wherein
One anti-blocking hot wind adjusts door, and keeps other anti-blocking hot winds to adjust door and close.
Embodiment 5
On the basis of embodiment 4, following improvement is further made: to monitor air preheater cold-end air heat accumulating element respectively
The anti-blocking effect of each ring, above-mentioned every ring heat accumulating element hot end, corresponding anti-blocking ash content storehouse outlet port, is arranged at least one anti-blocking ash
Hot wind sample tap takes out the anti-blocking grey hot wind for having flowed through heat accumulating element, its dust concentration of on-line measurement；Above-mentioned heat accumulating element cold end
The Dust Capacity being carried out in the unit area of end face is more, illustrates that the stifled ash tendency of heat accumulating element that anti-blocking grey hot wind is purged is brighter
It is aobvious；When increasing the anti-blocking grey hot blast rate being passed through in some anti-blocking grey air compartment, above-mentioned monitoring dust concentration declines, then explanation pair
The anti-blocking ash of Ying Yihuan heat accumulating element works well, and the anti-blocking grey hot blast rate before increase is the best wind in a corresponding ring heat accumulating element
Amount.
The method that the air preheater cold end heat accumulating element of above-mentioned each example divides ring anti-blocking, by reducing anti-blocking ash heat of same period
Wind passage section and the inorganization for reducing anti-blocking ash content storehouse are leaked out, and are reached under the premise of guarantee air preheater anti-blocking grey effect
The purpose for reducing anti-blocking grey hot wind dosage, has the outstanding advantages such as with low investment, operating cost is low, blocking-proof result is significant.
Claims (10)
1. a kind of method that air preheater cold-end air heat accumulating element divides ring anti-blocking, it is characterised in that: cold in air preheater rotor
It holds end face that partition is set, cold end end face is divided into the independent air intake passage of two or more, blown respectively using anti-blocking grey hot wind
It is anti-blocking to sweep each air intake passage progress.
2. the method that air preheater cold-end air heat accumulating element as described in claim 1 divides ring anti-blocking, it is characterised in that: Mei Gejin
The anti-blocking grey air compartment being individually connected to it is equipped on wind channel, using the anti-blocking grey indoor anti-blocking grey hot-air blowing of wind its
Corresponding air intake passage carries out anti-blocking.
3. the method that air preheater cold-end air heat accumulating element as claimed in claim 2 divides ring anti-blocking, it is characterised in that: all
The upstream of anti-blocking ash air compartment merges in the same anti-blocking grey bellows, is blown using the anti-blocking grey hot wind taking turn in anti-blocking grey bellows
It is anti-blocking to sweep each air intake passage progress.
4. the method that air preheater cold-end air heat accumulating element as claimed in claim 2 or claim 3 divides ring anti-blocking, it is characterised in that: every
Anti-blocking hot wind is equipped on a anti-blocking grey air compartment and adjusts door, and it is indoor anti-that each anti-blocking grey wind of control is individually adjusted by actuator
Stifled ash hot blast rate and purge time.
5. the method that air preheater cold-end air heat accumulating element as claimed in any one of claims 1-3 divides ring anti-blocking, feature
Be: partition is the circumferential partition of circular ring structure, shares the road n circumferential direction partition, and cold end end face is divided into n+ by concentric setting
1 independent circular air inlet channel, 1≤n≤5.
6. the method that air preheater cold-end air heat accumulating element as claimed in claim 5 divides ring anti-blocking, it is characterised in that: at least exist
The intermediate radial partition that the rotor cold end end face setting in the circular air inlet channel of most outer ring is connect with circumferential partition.
7. the method that air preheater cold-end air heat accumulating element as claimed in claim 6 divides ring anti-blocking, it is characterised in that: Mei Gezhuan
The corresponding intermediate radial partition of sub- storehouse lattice, intermediate radial partition are arranged along the angular bisector of its corresponding rotor storehouse lattice.
8. the method that air preheater cold-end air heat accumulating element as claimed in claim 6 divides ring anti-blocking, it is characterised in that: it is circumferential every
It is equipped on plate on circumferential seal piece and/or intermediate radial partition and intermediate radial diaphragm seal is installed.
9. the method that air preheater cold-end air heat accumulating element as claimed in claim 5 divides ring anti-blocking, it is characterised in that: Mei Gehuan
The anti-blocking grey air compartment being individually connected to it is equipped on shape air intake passage, the upstream of all anti-blocking grey air compartments merges in
In the same anti-blocking grey bellows, anti-blocking hot wind is equipped on each anti-blocking grey air compartment and adjusts door, utilizes preventing in anti-blocking grey bellows
It is anti-blocking that stifled ash hot wind taking turn purges each air intake passage progress.
10. the method that air preheater cold-end air heat accumulating element as claimed in any one of claims 1-3 divides ring anti-blocking, feature
It is: in the outlet port in each air intake passage hot end, at least one anti-blocking grey hot wind sample tap is set, is taken in anti-blocking grey hot wind
The dust concentration q of the sampling of sample mouth and on-line measurement samples taken, judges corresponding heat accumulating element by measured dust concentration q
Stifled grey situation；When increasing the anti-blocking grey hot blast rate being passed through in corresponding air intake passage, dust concentration q decline, then before increasing
Anti-blocking grey hot blast rate be best air quantity in corresponding air intake passage.
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