CN207929005U - A kind of SCR equipment for denitrifying flue gas - Google Patents
A kind of SCR equipment for denitrifying flue gas Download PDFInfo
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- CN207929005U CN207929005U CN201721870450.1U CN201721870450U CN207929005U CN 207929005 U CN207929005 U CN 207929005U CN 201721870450 U CN201721870450 U CN 201721870450U CN 207929005 U CN207929005 U CN 207929005U
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- ash bucket
- flue gas
- filtration members
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000003546 flue gas Substances 0.000 title claims abstract description 73
- 238000001914 filtration Methods 0.000 claims abstract description 53
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 239000004071 soot Substances 0.000 claims description 9
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 103
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 7
- 239000002956 ash Substances 0.000 description 65
- 235000013339 cereals Nutrition 0.000 description 27
- 238000010586 diagram Methods 0.000 description 15
- 230000005484 gravity Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 230000000903 blocking effect Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003500 flue dust Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 235000013578 rice krispies Nutrition 0.000 description 1
Abstract
The utility model is related to a kind of SCR equipment for denitrifying flue gas comprising be sequentially communicated the economizer, flue and reactor of setting, be equipped with catalyst in reactor, further include the first ash bucket, third ash bucket and at least one second ash bucket；Flue includes at least two linkage sections set gradually and reactor inlet section, and ammonia-gas spraying device is equipped in linkage section, filtration members are equipped in reactor inlet section；First ash bucket is set to the bottom of the corner between economizer and linkage section adjacent thereto；Each linkage section is not less than one end towards air-flow upstream towards one end of airflow downstream, and the second ash bucket is set to the bottom of the corner between two neighboring linkage section；Third ash bucket is set to the bottom of reactor inlet section, and filtration members are located at one end of third ash bucket orientating reaction device.The SCR equipment for denitrifying flue gas can be suitable for the pre- dust removal process of high cloud of dust gas and can effectively improve efficiency of dust collection, the problems such as abrasion occurs to prevent catalyst, blocks and is poisoned.
Description
Technical field
The utility model is related to gas denitrifying technology fields, and in particular to a kind of SCR equipment for denitrifying flue gas.
Background technology
Selective catalytic reduction (SCR, selective catalyst reactive) denitration technology with it is simple in structure, can
By the advantages that property is good, denitration efficiency is high, the denitrating flue gas market in the world 80% is occupied, coal-burning power plant of China is widely used in
In.
In order to maintain the high activity of catalyst and the economy of operation, the denitrating system of existing SCR generally to use high dirt cloth
Mode is set, i.e., SCR reactors are arranged between boiler economizer and air preheater.Due to catalyst in high dirt environment work
Make, is easy to cause catalyst dust stratification, blocks.Simultaneously as containing there are many featheriness or flower-shaped big of rice krispies in coal-fired flue-gas
Grain dust, accelerates the blocking of catalyst.Analysis finds that catalyst dust stratification, blocking will cause flue gas flow field to deteriorate, dust stratification area stream
Fast smaller, dust stratification is more serious, high velocity flow velocity bigger, and abrasion is more serious, ultimately causes the destruction of monolith design,
Lead to catalyst inactivation.Data statistics shows that catalyst costs account for about the 24% of operation ingredient, and catalyst service life is shorter,
Denitration operating cost is higher.
Above-mentioned to solve the problems, such as, existing solution is usually that the flue before catalyst lays pre- dedusting dress
It sets, intercepts bulky grain flying dust.To alleviate catalyst blockage and abrasion.
As 104208958 B of utility model patent CN disclose a kind of turnable pre- dedusting dress for SCR denitration system
It sets, as shown in Figure 1, including mainly ash bucket 01, pre- dust removing units 02 and flue dust block 03 etc. may be reversed.This is installed on economizer and goes out
Mouth flue connection, the Involving velocity for utilizing flue dust block 03 and the filter plate that pre- dust removing units 02 may be reversed intercept big in flue gas
Grain flying dust.Although there is good pre- dust removing effects, it is only applicable in the medium relatively low unit of flying dust concentration in flue gas, faces higher
Concentration dust (ash concentration like flying>50g/Nm3) the case where, it be easy to cause the blocking of pre- dust removing units 02, resistance increases, filters
The problems such as plate is worn, so that the problems such as catalyst still faces abrasion, blocking and poisoning.Meanwhile the technology mainly for
It is bulky grain flying dust, and to bad compared with the flying dust dust removing effects of small particle.Further, since the technology pre-dedusting device is arranged in height
The flue section of flow velocity can additionally increase higher local resistance, to increase the operating cost of SCR denitration system.
Therefore, how to provide it is a kind of can be suitable for high cloud of dust gas pre- dust removal process and efficiency of dust collection can be effectively improved,
The equipment for the problems such as abrasion occurs to prevent catalyst, blocks and is poisoned is urgently to solve to one skilled in the art
Certainly the technical issues of.
Utility model content
The purpose of this utility model is to provide a kind of SCR equipment for denitrifying flue gas, can be suitable for the pre- dedusting of high cloud of dust gas
The problems such as handling and can effectively improve efficiency of dust collection, abrasion occurs to prevent catalyst, blocks and is poisoned.
In order to solve the above technical problems, the utility model provides a kind of SCR equipment for denitrifying flue gas, including it is sequentially communicated setting
Economizer, flue and reactor, catalyst is equipped in the reactor, which is characterized in that further include the first ash bucket, third ash
Bucket and at least one second ash bucket；The flue includes at least two linkage sections set gradually and reactor inlet section, described
It is equipped with ammonia-gas spraying device in linkage section, filtration members are equipped in the reactor inlet section；First ash bucket is set to the economizer
The bottom of corner between the linkage section adjacent thereto；One end of each linkage section towards airflow downstream is not less than
Towards one end of air-flow upstream, second ash bucket is set to the bottom of the corner between the two neighboring linkage section；It is described
Third ash bucket is set to the bottom of the reactor inlet section, and the filtration members are located at the third ash bucket towards the reactor
One end.
In SCR equipment for denitrifying flue gas provided by the utility model, flue includes at least two linkage sections set gradually
With reactor inlet section, wherein the first ash bucket is set to the bottom of the corner between economizer and linkage section adjacent thereto, the
Two ash buckets are set to the bottom of the corner between two neighboring linkage section, and third ash bucket is set to the bottom of reactor inlet section, should
Three dedusting stages of the pre- dust removal process of SCR equipment for denitrifying flue gas point below carry out three dedusting stages under this scheme detailed
Thin description.
First dedusting stage：Ash-laden gas flows through economizer and linkage section adjacent thereto (the hereinafter referred to as first connection
Section) between corner when, under the turning of wide-angle, flying dust is acted on by gravity and centrifugal force flow of flue gas at this time, portion
Divide big grain size flying dust to deviate flow of flue gas track, falls into the first ash bucket, and the flying dust of collection at large will be thrown toward and turn for the first time
The outer side in crook, the i.e. lower section of flue, close to the first linkage section bottom wall side, show the flying dust amount below flue
Particle size of fly ash below and flue more than the flying dust amount of the top trend big relative to the particle size of fly ash above flue.
Second dedusting stage：When flue includes two linkage sections, flue gas flows through the first linkage section and company adjacent thereto
When connecing the corner between section (hereinafter referred to as the second linkage section), flying dust is acted on by gravity and centrifugal force again, part
Big grain size flying dust deviates flow of flue gas track, falls into the second ash bucket；In addition have what the preceding paragraph (the first linkage section) was created
Sharp dedusting condition (flying dust concentration height, the grain size of the first linkage section bottom are big), may make flue gas can in second linkage section
The flying dust compared with the preceding paragraph thinner (grain size smaller) is removed, the flying dust of bulky grain is further eliminated；And the flying dust quilt of collection at large
It gets rid of to the outer side in second of turning, i.e. side of the flue far from economizer is (for the right, at this point, economizer position
In the left side of reactor), positioned at the side of the second linkage section right side wall, flying dust amount of the flying dust amount on the right side of flue than left side is presented
Particle size of fly ash more, on the right side of flue the trend big relative to the particle size of fly ash on the left of flue.
When flue includes multiple linkage sections, can be respectively provided in the bottom of the corner between all two neighboring linkage sections
Second ash bucket, since each linkage section is towards one end of airflow downstream otherwise less than one end towards air-flow upstream, i.e., each linkage section
It is horizontal along airflow direction, be obliquely or vertically arranged upwards, when flue gas flows through the corner between each linkage section, due to by turning
The centrifugal force of crook lateral direction (diagonally downward), large-sized flying dust will be fallen into and are set under the action of gravity and centrifugal force
In second ash bucket of the corner bottom, such structure setting is convenient for carrying out more efficient, thoroughly pre- dedusting to high cloud of dust gas.When
So, if multiple linkage sections at this are to be arranged or have other factors consideration due to being limited by space, then two neighboring company
Ash bucket can not be set by connecing the corner of section.
The third dedusting stage：When entering in reactor inlet section, flying dust is stopped flue gas by filtration members, and accumulation forms big
It is fallen under gravity into third ash bucket after grain flying dust or dust block, simultaneously as being removed what is created on last stage
Dirt condition (right side flying dust concentration height, the grain size of flue are big), flying dust is located at reactor inlet when entering in reactor inlet section
The lower section of section, and be settled down under gravity in third ash bucket, passing through the first dedusting stage and the second dedusting stage two
After the dustproof function in a stage, which can remove thinner compared with the first two dedusting stage by the interception of filtration members
Flying dust.In addition, filtration members are set to the one end of third ash bucket towards airflow downstream, can avoid generating dust stratification dead angle.
In the SCR equipment for denitrifying flue gas, three phases is divided to be dusted flue gas, and each stage dedusting can be next
The dedusting of section creates favorable conditions so that next section of dedusting can remove the flying dust thinner than the preceding paragraph dedusting, so that always
Pre- high dust collection efficiency, can nearly completely remove bulky grain flying dust, significantly reduce catalyst ash cutting, block and in
The risk of poison effectively extends the service life of catalyst, the pre- dust removal process especially suitable for high cloud of dust gas.
Optionally, at least one in the linkage section to be vertically arranged, and the bottom of at least one linkage section being vertically arranged
Equipped with second ash bucket.
Optionally, the section width of the reactor inlet section is more than the section width of the linkage section.
Optionally, the reactor inlet section is equipped with undergauge step along airflow direction, and the undergauge step is in the filtering
The grey structure of gear is formed between part and the third ash bucket.
Optionally, the wedge-shaped catch that bottom is in horizontal structure, the wedge-shaped catch are additionally provided with above second ash bucket
Positioned at side side wall of the linkage section far from epimere flue.
Optionally, the reactor inlet section is to be segmented ramp structure towards one end of the reactor comprising at least
Two tilting sections, and each tilting section is sequentially reduced with the angle of horizontal direction from high to low.
Optionally, the reactor inlet section is additionally provided with deashing device, and the deashing device is located at institute including two
State the pressure monitoring part and two soot blowers for being located at the filtration members both sides of filtration members both sides；When two pressure prisons
When the pressure difference that survey part is monitored reaches preset pressure value, two soot blowers alternately purge the filtration members.
Optionally, the filtration members include strainer, the frame for fixing the strainer and are used to support the strainer
Bracing piece；The section of the filtration members includes multiple sequentially connected peak shape structures, each peak shape structure include arc section and
The straightway of straightway positioned at the arc section both ends, two neighboring peak shape structure is connected with each other.
Optionally, the strainer is formed by orthogonal metal wire knitted, and the trepanning of the strainer is square hole.
Optionally, each corner of the flue is equipped with deflector, and the entrance of the reactor is equipped with fairing.
Description of the drawings
Fig. 1 is the structural schematic diagram of the turnable pre-dedusting device of SCR denitration system in the prior art；
Fig. 2 is the structural schematic diagram for the SCR equipment for denitrifying flue gas that the utility model embodiment is provided；
Fig. 3 is the enlarged drawing of the A in Fig. 2；
Fig. 4 is the structural schematic diagram of the first stage dedusting of the utility model embodiment；
Fig. 5 is the structural schematic diagram of the second stage dedusting of the utility model embodiment；
Fig. 6 is the structural schematic diagram of the phase III dedusting of the utility model embodiment；
Fig. 7 is the structural schematic diagram of filtration members in Fig. 1；
Fig. 8 is the sectional view of Fig. 7；
Fig. 9 is that one end of the reactor inlet section orientating reaction device in the utility model embodiment is when being segmented ramp structure
Flow of flue gas track schematic diagram；
Figure 10 is that one end of the reactor inlet section orientating reaction device in the utility model embodiment is single hop ramp structure
When flow of flue gas track schematic diagram.
In attached drawing 1, the reference numerals are as follows：
01- ash buckets；The pre- dust removing units of 02-；03- flue dust blocks.
In attached drawing 2-10, the reference numerals are as follows：
1- economizers；2- reactors；The first linkage sections of 31-, the second linkage sections of 32-, 33- reactor inlet sections, 331- are oblique
Slope structure；The first ash buckets of 41-, the second ash buckets of 42-, 43- third ash buckets；5- filtration members, 51- peak shape structures, 511- arc sections,
512- straightways, 52- strainers, 53- frames, 54- bracing pieces；6- wedge-shaped catch；The grey structure of 7- gears；8- deashing devices, 81- pressure
Monitor part, 82- soot blowers；9- fairings；10- catalyst；11- deflectors；12- ammonia-gas spraying devices；13- flying dusts.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Please refer to Fig.2 the structural schematic diagram that -6, Fig. 2 is the SCR equipment for denitrifying flue gas that the utility model embodiment is provided；
Fig. 3 is the enlarged drawing of the A in Fig. 2；Fig. 4 is the structural schematic diagram of the first stage dedusting of the utility model embodiment；Fig. 5 is this
The structural schematic diagram of the second stage dedusting of utility model embodiment；Fig. 6 is the phase III dedusting of the utility model embodiment
Structural schematic diagram.
As shown in Figures 2 and 3, the utility model embodiment provides a kind of SCR equipment for denitrifying flue gas comprising connects successively
Economizer 1, flue and the reactor 2 of logical setting, wherein catalyst is equipped in reactor 2.The SCR equipment for denitrifying flue gas also wraps
Include the first ash bucket 41, the second ash bucket 42 and third ash bucket 43, wherein the quantity of the second ash bucket 42 is at least one.Flue include according to
At least two linkage sections and reactor inlet section 33 of secondary setting, wherein ammonia-gas spraying device 12, reactor inlet are equipped in linkage section
Filtration members are equipped in section 33.First ash bucket 41 is set to economizer 1 and linkage section adjacent thereto (hereinafter referred to as the first linkage section
31) bottom of the corner between, the second ash bucket 42 are set to the bottom of the corner between two neighboring linkage section, third ash bucket
43 are set to the bottom of reactor inlet section 33, three dedusting stages of the pre- dust removal process of the SCR equipment for denitrifying flue gas point, below it is right
Three dedusting stages under this scheme are described in detail.
First dedusting stage：As shown in figure 4, ash-laden gas is flowing through the turn between economizer 1 and the first linkage section 31
When place, under the zig zag of wide-angle, flying dust 13 is acted on by gravity and centrifugal force flow of flue gas at this time, and the big grain size in part flies
Ash 13 deviates flow of flue gas track, falls into the first ash bucket 41, and the flying dust 13 of collection at large will be thrown toward first time turning
Outer side, the i.e. lower section of flue, close to the first linkage section 31 bottom wall side, show 13 amount of flying dust below flue
13 grain size of flying dust below and flue more than 13 amount of flying dust of the top trend big relative to 13 grain size of flying dust above flue.
Second dedusting stage：As shown in figure 5, when flue includes two linkage sections, flue gas flows through 31 He of the first linkage section
When corner between linkage section (hereinafter referred to as the second linkage section 32) adjacent thereto, flying dust 13 again by gravity and from
The effect of mental and physical efforts, the big 13 deviation flow of flue gas track of grain size flying dust in part, falls into the second ash bucket 42；In addition in the preceding paragraph (
One linkage section 31) the advantageous dedusting condition (flying dust 13 concentration below 31 flue of the first linkage section is high, grain size is big) created, it can
So that flue gas can remove the flying dust 13 compared with the preceding paragraph thinner (grain size smaller) in second linkage section 32, further eliminate
The flying dust 13 of bulky grain；And the flying dust 13 of collection at large is thrown toward the outer side in second of turning, i.e., flue is far from province's coal
The side (the present embodiment is right side, at this point, economizer 1 is located at the left side of reactor 2) of device 1 is located at 32 right side of the second linkage section
The side of wall, present on the right side of flue 13 amount of flying dust is more than 13 amount of flying dust in left side, 13 grain size of flying dust on the right side of flue relative to
The big trend of 13 grain size of flying dust on the left of flue.
When flue includes multiple linkage sections, the second ash bucket can be respectively provided in the corner between two neighboring linkage section
42, since each linkage section is towards one end of airflow downstream otherwise less than one end towards air-flow upstream, that is to say, that each linkage section
It is horizontal along airflow direction, be obliquely or vertically arranged upwards, when flue gas flows through the corner between each linkage section, due to by turning
The centrifugal force of crook lateral direction (diagonally downward), large-sized flying dust will be fallen into and are set under the action of gravity and centrifugal force
In second ash bucket 42 of the corner bottom, such structure setting is convenient for carrying out more efficient, thoroughly pre- dedusting to high cloud of dust gas.
Certainly, if multiple linkage sections at this are to be arranged due to being limited by space, or have other factors consideration, then two neighboring
The corner of linkage section can not set ash bucket.
The third dedusting stage：As shown in fig. 6, flue gas is when entering in 2 entrance of reactor, the flying dust 13 of greater particle size exists
Stopped by filtration members 5 under inertial force, and fall under gravity into third ash bucket 43, simultaneously as upper one
The dedusting condition (13 concentration of right side flying dust height, the grain size of flue are big) that stage is created, flying dust 13 is entering reactor inlet section
It positioned at the lower section of reactor inlet section 33 when in 33, and is settled down under gravity in third ash bucket 43, by first
After the dustproof function in dedusting stage and second two stages of dedusting stage, which can by the interception of filtration members 5
The removal flying dust 13 thinner compared with the first two dedusting stage.In addition, in the present embodiment, filtration members 5 are set to 43 direction of third ash bucket
One end of airflow downstream can avoid generating dust stratification dead angle.When equipped with undergauge step, the bottom that grey structure 7 is then located at filtration members 5 is kept off
Between portion and the end of third ash bucket 43.
In the SCR equipment for denitrifying flue gas, three phases is divided to be dusted flue gas, and each stage dedusting can be next
The dedusting of section creates favorable conditions so that and next section of dedusting can remove the flying dust 13 thinner than the preceding paragraph dedusting, so that
Total pre- high dust collection efficiency can nearly completely remove bulky grain flying dust 13, significantly reduce catalyst 10 the abrasion of flying dust 13,
The risk for blocking and being poisoned effectively extends the service life of catalyst 10, the pre- dust removal process especially suitable for high cloud of dust gas.
At least one is vertically arranged linkage section in the above-described embodiments, and wherein at least one is vertically arranged
The bottom of linkage section be equipped with the second ash bucket 42, it is vertical that flue gas is entered by horizontally disposed linkage section or the linkage section being obliquely installed
When in the linkage section of setting, turn angle is larger, and the centrifugal force suffered by flying dust 13 is larger, and under gravity can be direct
It falls into positioned at the bottom of the linkage section being vertically arranged, into the second ash bucket 42.
In the above-described embodiments, the section width of reactor inlet section 33 is more than the section width of linkage section so that flue gas
Air velocity reduces after entering in reactor inlet section 33, extends the gravitational settling time of flying dust 13, is conducive to bulky grain
Flying dust 13 is fallen into third ash bucket 43.Simultaneously as the section width of reactor inlet section 33 is larger, air velocity is relatively low,
Therefore, which is set in reactor inlet section 33, the resistance of filtration members 5 can be reduced, mitigate flying dust 13 to filtration members 5
Abrasion, and be conducive to be fallen into ash bucket by the flying dust 13 that filtration members 5 are intercepted.
In addition, being equipped with the ammonia-gas spraying device 12 of the ammonia for providing the reaction of SCR denitrating flue gas in linkage section, flue gas enters
Air velocity reduces after in reactor inlet section 33, can extend the time of ammonia/nitrogen mixing, be conducive to ammonia density and be evenly distributed, carry
High denitration efficiency.Specifically, the specific location for ammonia-gas spraying device 12 does not require, it can be set to the second connection as shown in Figure 2
In section 32, it can also be set in the first linkage section 31 alternatively, when linkage section quantity is multiple, other linkage sections can be positioned in
Inside.
In the above-described embodiments, reactor inlet section 33 is additionally provided with undergauge step along airflow direction, and the undergauge step is in mistake
The grey structure 7 of formation gear between filter part 5 and third ash bucket 43, i.e. the reactor inlet section 33 are in third ash bucket 43 along airflow direction
Both ends are equipped with height difference H, and one end height towards airflow downstream is higher, by the advantageous dedusting condition created in the preceding paragraph,
So that flue gas when entering reactor inlet section 33, is located at 13 concentration of flying dust height, grain below 33 flue of reactor inlet section
Diameter is big, and the flying dust 13 of lower section will be intercepted under the blocking of gear ash structure 7 and fall into third ash bucket along the side wall of gear ash structure 7
In 43, which can further remove the flying dust 13 thinner compared with the preceding paragraph.Compared to only being intercepted by filtration members 5
High concentration, large-sized flying dust 13 are caused to impact and be worn to filtration members 5, extend the service life of filtration members 5.
Wherein, to the value of height difference H and be not particularly limited, if but H values it is too small, keep off ash effect unobvious, if
Value is too big, then volume is larger, and occupied space is larger, therefore, as shown in figure 3, in the present embodiment, the value of H is set
For 250-500mm, overall volume can be reduced while effect grey with good gear.
As shown in figure 3, the section width of reactor inlet section 33 is B2, the section width of linkage section is B1, wherein B2 is big
Concrete numerical value in B1, and for B1 and B2 is simultaneously not particularly limited, and the value range of B2/B1 is set as 1.5 in the present embodiment
~2.5, if value is too big, volume is larger, occupied space is larger, if value is too small, weakens the dust removing effects of such structure,
Therefore, entirety can be minimized while ensureing to effectively improve dust removing effects by the value range of B2/B1 being set as 1.5~2.5
Volume.
In the above-described embodiments, the top of the second ash bucket 42 is additionally provided with wedge-shaped catch 6, which is located at linkage section
Side side wall far from epimere flue, as shown in Fig. 2, the corner bottom between the first linkage section 31 and the second linkage section 32 is set
There is the second ash bucket 42, the wedge-shaped catch 6 set on the top of second ash bucket 42 is located remotely from side (this implementation of the first ash bucket 41
It is right side in example) side wall, and the bottom of the wedge-shaped catch 6 is in horizontal structure.The wedge-shaped catch 6 in linkage section be in " ∠ " type
Structure, and positioned at the top of the second ash bucket 42, since the advantageous dedusting condition i.e. first created in the first linkage section 31 connects
13 concentration of flying dust height, grain size below 31 flues of section is big, and flue gas is somebody's turn to do when entering in the second linkage section 32 by second of turning
13 concentration of flying dust height, the grain size on right side are big in second linkage section 32, and flue gas is in the process risen in second linkage section 32
In, the flying dust 13 on right side will be fallen in the second ash bucket 42 under the blocking of the horizontal structure of the wedge-shaped catch 6, alleviate due to
Carrying of flying back caused by flue gas high flow rate, further improves dust removing effects.
In the above-described embodiments, it is additionally provided with deashing device 8 in reactor inlet section 33, which includes two pressures
Power monitors part 81 and two soot blowers 82, wherein two pressure monitoring parts 81 are located at the both sides of filtration members 5, two soot blowings
Device 82 is located at the both sides of filtration members 5, and both sides refer to the side towards air-flow upstream and the side towards airflow downstream.Two
Pressure monitoring part 81 is respectively monitored the pressure of 5 both sides of filtration members, when pressure difference reaches preset pressure value, then shows this
Filtration members 5 block, at this point, starting two soot blowers 82, two soot blowers 82 are respectively from the both sides of filtration members 5 alternately to mistake
Filter part 5 is purged, until after pressure recovery to normally-pressured neighbor, stops purging, filtration members 5 clean out.And it cleared up
The flying dust that filter part 5 is fallen will be fallen into third ash bucket 43.Wherein, preset pressure value and normally-pressured neighbor can be according to theory deductions
Or summary of experience etc., it is not specifically limited herein.The setting of the deashing device 8 is convenient for supervising the stopping state of filtration members 5
Survey, at the same clear up it is more convenient, without dismounting, simplify operation.
Fig. 7-8 is please referred to, Fig. 7 is the structural schematic diagram of filtration members in Fig. 1；Fig. 8 is the sectional view of Fig. 7.
Filtration members 5 in the above-described embodiments include strainer 52, frame 53 and bracing piece 54, wherein frame 53 is along strainer
52 edge setting, bracing piece 54 are located at the surface of strainer 52, and its both ends and the fixation of frame 53, such structure setting relative to
For being only filtered by strainer 52, the structural strength of the filtration members 5 can be effectively improved, its service life is extended.
In the above-described embodiments, the section of filtration members 5 includes multiple sequentially connected peak shape structures 51, each peak shape structure 51
The straightway 512 of straightway 512 including arc section 511 and positioned at 511 both ends of arc section, two neighboring peak shape structure 51 is mutual
Connection.Such structure effectively increases the specific collection area of filtration members 5, improves the dust removing effects of filtration members 5.Certainly, in the present embodiment
In, the section of the filtration members 5 can also be set to zigzag structure, but such structure is tied for zigzag structure
Structure stability is more preferable, in the case where the larger pressure of flue gas flow rate increases, can ensure the intensity of the filtration members 5, extend and use
Service life.And the value range of the angle γ between two straightways 512 in each peak shape structure 51 is 40 °~70 °, this angle
Range can guarantee that the structural strength of the filtration members 5, resistance capacity to deformation are strong.
In addition, the filtration members 5 are inclined to set in reactor inlet section 33, the angle α for being in horizontal direction
Value range is preferably 50 °~80 °, in this angular range, can ensure itself and reactor while ensureing to increase filter area
Bonding strength in entrance 33.
In the present embodiment, strainer 52 is made of metal wire knitted, and the opening of the strainer 52 is square hole,
Certainly, in the present embodiment, the specific material of strainer 52, structure are not limited, strainer 52 can made of metal wire knitted
Increase its intensity, ensure service life, and trepanning is set as square hole, the connection area between each trepanning can be reduced, breathed freely
Property is good.At this point, the filtration members 5 similar to rectangular orifice plate, while being intercepted to flying dust 13, can also play the work flowed
With.
Fig. 9-10 is please referred to, Fig. 9 is that one end of the reactor inlet section orientating reaction device in the utility model embodiment is
It is segmented flow of flue gas track schematic diagram when ramp structure；Figure 10 is the reactor inlet section direction in the utility model embodiment
Flow of flue gas track schematic diagram when one end of reactor is single hop ramp structure.
It is equipped with deflector 11 in each corner of flue, so that flow field is more stable.Meanwhile flue gas enters reaction along flue
When device 2, the entrance of reactor 2, which is equipped with fairing 9, to carry out rectification to entering its internal flue gas, so that the flow field of flue gas is more
It is steady.
In the above-described embodiments, one end of 33 orientating reaction device 2 of reactor inlet section is segmented ramp structure 331,
Including at least two tilting sections, and angle of each tilting section from high to low between horizontal direction is sequentially reduced.Flue gas is from reaction
Device entrance 33 need to turn when entering reactor 2 through the 4th time, as shown in Figure 9 and Figure 10, wherein arrow direction is flow of flue gas
Direction, for segmentation ramp structure 331 so that the flue gas stream into reactor 2 is squeezed, fraction can be toward reactor 2
It flows in left side.It, can be effectively so that flow field becomes uniform, compared to by arranging water conservancy diversion after continuously across at least two tilting sections
The water conservancy diversion measure of plate 11 or spoiler solves the problems, such as even flow field, can be saved using segmentation ramp structure 331 and not set
In the consumptive material of the water conservancy diversion measure of the part, cost is reduced, meanwhile, list as shown in Figure 10 is can avoid equipped at least two tilting sections
There is reflux in 10 left side of catalyst that section slope flue occurs and the problems such as flow velocity is low, 10 right side flow velocity of catalyst is high.
In addition, the specific number of fragments to the segmentation ramp structure 331 is not limited, can be arranged under normal conditions
Be two sections or three sections, as shown in Figure 2 and Figure 9, in the present embodiment, which be set as two sections, higher one section with horizontal plane
Angle is β 1, and the angle of relatively low one section and horizontal plane is β 2,1 ＞ β 2 of β, can be while ensureing to play current balance function, and simplification is whole
Body structure.
Certainly, in the present embodiment, ramp structure 331 is a part for reactor inlet section 33, can also be by the slope
Structure 331 be set as with the individual structure each other of reactor inlet section 33, be not specifically limited herein.
Specifically, as shown in Fig. 2, the operation principle letter for the SCR equipment for denitrifying flue gas that the utility model embodiment is provided
It states as follows：
(1) when ash-laden gas is flowed out from economizer 1 by turning for the first time to the first linkage section 31, flying dust 13 is heavy in gravity
Drop is acted on and is trapped for the first time to the first ash bucket 41 under centrifugation；
(2) flue gas is when by second of turning to the second linkage section 32, again by second under the action of centrifugation
In secondary trapping to the second ash bucket 42；And then, flue gas is mixed in the second linkage section 32 with the ammonia from ammonia-gas spraying device 12
It closes；
(3) flue gas comes reactor inlet section 33 using third time turning, inertial collision of the flying dust 13 in filtration members 5
It is trapped for the third time to third ash bucket 43 under interception function and gravitational settling effect；
(4) flue gas Jing Guo the dedusting of above three stage is under the rectified action of segmentation ramp structure and fairing 9,
Even to enter 10 layers of catalyst, under the action of catalyst 10, nitrogen oxides and ammonia reaction in flue gas generate water and nitrogen, i.e.,
Denitration reaction；
(5) finally, flue gas flows out denitrification apparatus through exhaust pass, into next stage equipment.
Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of SCR equipment for denitrifying flue gas, including it is sequentially communicated the economizer (1), flue and reactor (2) of setting, it is described anti-
It answers and is equipped with catalyst (10) in device (2), which is characterized in that further include the first ash bucket (41), third ash bucket (43) and at least one
Second ash bucket (42)；
The flue includes at least two linkage sections set gradually and reactor inlet section (33), and spray is equipped in the linkage section
Ammonia device (12), the reactor inlet section (33) is interior to be equipped with filtration members (5)；
First ash bucket (41) is set to the bottom of the corner between the economizer (1) and the linkage section adjacent thereto
Portion；
Each linkage section is not less than one end towards air-flow upstream towards one end of airflow downstream, and second ash bucket (42) sets
The bottom of corner between the two neighboring linkage section；
The third ash bucket (43) is set to the bottom of the reactor inlet section (33), and the filtration members (5) are located at described the
The one end of three ash buckets (43) towards the reactor (2).
2. SCR equipment for denitrifying flue gas according to claim 1, which is characterized in that at least one vertical in the linkage section
Setting, and the bottom of at least one linkage section being vertically arranged is equipped with second ash bucket (42).
3. SCR equipment for denitrifying flue gas according to claim 1, which is characterized in that the reactor inlet section (33) is broken
Face width is more than the section width of the linkage section.
4. SCR equipment for denitrifying flue gas according to claim 3, which is characterized in that the reactor inlet section (33) is along gas
It flows direction and is equipped with undergauge step, the undergauge step forms gear ash between the filtration members (5) and the third ash bucket (43)
Structure (7).
5. SCR equipment for denitrifying flue gas according to claim 1, which is characterized in that the top of second ash bucket (42) is also
It is in the wedge-shaped catch (6) of horizontal structure equipped with bottom, the wedge-shaped catch (6) is located at one of the linkage section far from epimere flue
Side side wall.
6. according to claim 1-5 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the reactor inlet section
(33) it is segmentation ramp structure towards one end of the reactor (2) comprising at least two tilting sections, and each tilting section
It is sequentially reduced from high to low with the angle of horizontal direction.
7. according to claim 1-5 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the reactor inlet section
(33) it is additionally provided with deashing device (8), the deashing device (8) includes two pressure for being located at the filtration members (5) both sides
Monitor part (81) and two soot blowers (82) for being located at the filtration members (5) both sides；
When the pressure difference that two pressure monitoring parts (81) are monitored reaches preset pressure value, two soot blowers
(82) filtration members (5) alternately are purged.
8. according to claim 1-5 any one of them SCR equipment for denitrifying flue gas, which is characterized in that the filtration members (5) include
Strainer (52), the frame (53) for fixing the strainer (52) and the bracing piece (54) for being used to support the strainer (52)；
The section of the filtration members (5) includes multiple sequentially connected peak shape structures (51), and each peak shape structure (51) includes
Arc section (511) and the straightway (512) for being located at the arc section (511) both ends, the straight line of two neighboring peak shape structure (51)
Section (512) is connected with each other.
9. SCR equipment for denitrifying flue gas according to claim 8, which is characterized in that the strainer (52) is by orthogonal
Metal wire knitted forms, and the trepanning of the strainer (52) is square hole.
10. according to claim 1-5 any one of them SCR equipment for denitrifying flue gas, which is characterized in that each turn of the flue
Place is equipped with deflector (11), and the entrance of the reactor (2) is equipped with fairing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721870450.1U CN207929005U (en) | 2017-12-27 | 2017-12-27 | A kind of SCR equipment for denitrifying flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721870450.1U CN207929005U (en) | 2017-12-27 | 2017-12-27 | A kind of SCR equipment for denitrifying flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207929005U true CN207929005U (en) | 2018-10-02 |
Family
ID=63647675
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721870450.1U Withdrawn - After Issue CN207929005U (en) | 2017-12-27 | 2017-12-27 | A kind of SCR equipment for denitrifying flue gas |
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| Country | Link |
|---|---|
| CN (1) | CN207929005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970772A (en) * | 2017-12-27 | 2018-05-01 | 福建龙净环保股份有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN112569774A (en) * | 2020-12-25 | 2021-03-30 | 郑州市天之蓝环保科技有限公司 | Dust-containing flue gas conveying reversing pipeline and dry desulfurization system |
-
2017
- 2017-12-27 CN CN201721870450.1U patent/CN207929005U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970772A (en) * | 2017-12-27 | 2018-05-01 | 福建龙净环保股份有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN107970772B (en) * | 2017-12-27 | 2024-03-08 | 福建龙净环保股份有限公司 | SCR flue gas denitrification facility |
| CN112569774A (en) * | 2020-12-25 | 2021-03-30 | 郑州市天之蓝环保科技有限公司 | Dust-containing flue gas conveying reversing pipeline and dry desulfurization system |
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| CB03 | Change of inventor or designer information |
Inventor after: Ye Xinglian Inventor after: Zheng Fang Inventor after: Zhang Chucheng Inventor after: Guo Jun Inventor after: Yang Ding Inventor after: Su Yinbiao Inventor after: Liu Dongdong Inventor after: An Xizhong Inventor before: Ye Xinglian Inventor before: Zheng Fang Inventor before: Zhang Chucheng Inventor before: Guo Jun Inventor before: Yang Ding Inventor before: Su Yinbiao Inventor before: Liu Dongdong Inventor before: An Xizhong |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240308 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240308 |