CN106621584A - Centrifugal type pre-dedusting device for SCR (selective catalytic reduction) denitration - Google Patents
Centrifugal type pre-dedusting device for SCR (selective catalytic reduction) denitration Download PDFInfo
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- CN106621584A CN106621584A CN201710110462.2A CN201710110462A CN106621584A CN 106621584 A CN106621584 A CN 106621584A CN 201710110462 A CN201710110462 A CN 201710110462A CN 106621584 A CN106621584 A CN 106621584A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Abstract
The invention discloses a centrifugal type pre-dedusting device for SCR (selective catalytic reduction) denitration. The centrifugal type pre-dedusting device comprises an air inlet flue, an outer cylinder, an ash hopper, a center cylinder and a centrifugal blade unit, wherein the inlet end of the outer cylinder is connected with the outlet end of the air inlet flue; the ash hopper is arranged under the outer cylinder and is communicated with the outer cylinder through the outlet end of the bottom part of the outer cylinder; the centrifugal blade unit is arranged at the centerline of the air inlet flue, and comprises a cone and blades; the cone is formed by connecting a front umbrella-shaped cone, a rear umbrella-shaped cone and a middle cylinder, and the blades are uniformly arranged at the peripheral surface of the cylinder; the center cylinder is arranged behind the centrifugal blade unit, the inlet end of the center cylinder faces the centrifugal blade unit, the outlet end of the center cylinder extends out of the rear part of the outer cylinder, and a gap is formed between the center cylinder and the outer cylinder. The centrifugal type pre-dedusting device has the advantages that before the SCR catalytic reaction occurs, part of fly ash in flue gas is removed, the problems of nonuniform flow field, blockage by catalyst and the like caused by deposition of fly ash are solved, and the normal running of a denitration device is guaranteed.
Description
Technical field
The present invention relates to the technical field that power plant exhaust is processed, more particularly, is related to a kind of centrifugation for SCR denitration
Formula pre-dedusting device.
Background technology
Counted according to domestic SCR denitration ruuning situation, SCR denitration device initial operating stage stable performance, but through several years
Operation, part power plant occur successively dust deposit in flue, catalyst blockage and it is damaged situations such as.
The method for solving at present mainly strengthens soot blowing, more catalyst changeout etc., but this can not solve root problem.Through dividing
Analysis, the device for this situation occur is mainly the high dust-laden project in part, and these project dust contents are at maximum up to 50g/Nm3.
The high concentration of grain thing is quite serious for the abrasion of washing away of catalyst, for honeycombed catalyst, abrasion occurs
When flue gas is flowed through, flow resistance and pressure drop all can reduce in duct, more flue gases are had by contrast and is flow through, so as to further
Aggravate this abrasive effect.
If in consideration of it, high dust-laden project does not carry out the pre- dedusting of denitration, then existing SCR technology would become hard to meet height and contain
The normal service requirement of dirt project.Therefore, a pre- dust removal process device is increased between economizer exit and SCR reactors to remove
Part flying dust is very necessary.
The content of the invention
In order to solve technical problem present in prior art, it is an object of the invention to provide one kind can be catalyzed in SCR
Reaction removes the part flying dust in flue gas and avoids coming flow field inequality, catalyst blockage etc. due to the flying dust string of deposits asking before occurring
Inscribe and cause the normal centrifugal pre-dedusting device for SCR denitration for running of denitrification apparatus.
The invention provides a kind of centrifugal pre-dedusting device for SCR denitration, the centrifugal pre-dedusting device bag
Inlet air stack, outer tube, ash bucket, central tube and centrifuge blade unit are included,
The arrival end of the outer tube is connected with the port of export of inlet air stack, and the ash bucket is arranged on the lower section of outer tube and passes through
The outer tube port of export of outer tube bottom is connected with outer tube；
The centrifuge blade unit is arranged on the center line of inlet air stack and including cone and blade, the cone by
The cylinder of front umbrella cone, rear umbrella cone and centre is connected and composed, and the blade is uniformly distributed in the cylinder
On external peripheral surface；
The central tube is arranged on the rear of centrifuge blade unit, and the entrance face of the central tube is to centrifuge blade unit
Arrange and the port of export stretches out from the rear portion of outer tube, there is gap between the central tube and outer tube.
It is used for one embodiment of the centrifugal pre-dedusting device of SCR denitration, the centrifugal pre- dedusting according to the present invention
Device is arranged between economizer exit and uptake flue.
According to the present invention for the centrifugal pre-dedusting device of SCR denitration one embodiment, the inlet air stack enters
Mouth end is connected by entrance square and round joint with economizer exit, and the port of export of the central tube is by outlet square and round joint and rising
Flue connects.
According to the present invention for SCR denitration centrifugal pre-dedusting device one embodiment, the inlet air stack be into
Less than the reamer shape inlet air stack of port of export diameter, the outer tube is cylinder outer tube to mouth end diameter, and the central tube is cylinder
Body central tube, the center line of the inlet air stack overlaps with the center line of the outer tube and the center line of the central tube.
It is used for one embodiment of the centrifugal pre-dedusting device of SCR denitration according to the present invention, the central tube includes expanding
Mouth section and cylindrical section, the arrival end diameter of the flared section is less than port of export diameter.
It is used for one embodiment of the centrifugal pre-dedusting device of SCR denitration according to the present invention, the front umbrella cone
Cone angle is 0～90 °, and the cone angle of the rear umbrella cone is 0～90 °, the entrance of the centrifuge blade cell distance inlet air stack
The minimum range at end is 0～0.1m.
It is used for one embodiment of the centrifugal pre-dedusting device of SCR denitration, the blade and air inlet cigarette according to the present invention
Slanted angle between the center line in road is 0～90 °, and the quantity of the blade is 6～12.
It is used for one embodiment of the centrifugal pre-dedusting device of SCR denitration according to the present invention, when the economizer exit
Width more than height twice when, be arranged in parallel in economizer exit with using the centrifugal dust collector more than two
Rise between flue.
According to the present invention for SCR denitration centrifugal pre-dedusting device one embodiment, when using described in two groups from
When core type deduster is arranged in parallel between economizer exit and uptake flue, the blades arrangement direction of two groups of centrifugal dust collectors
It is symmetrical arranged.
Centrifugal pre-dedusting device simple structure and easily fabricated, installation maintenance provided by the present invention for SCR denitration
Management and equipment investment and operating cost it is all relatively low, and can SCR catalytic reactions occur before remove flue gas in portion
Swarming ash (especially can be used to remove more than 5 μm of particle) is simultaneously avoided because the flying dust string of deposits comes that flow field is uneven, catalyst is stifled
The problems such as plug and cause denitrification apparatus normally run.
Description of the drawings
Fig. 1 shows the installation of the centrifugal pre-dedusting device for SCR denitration according to an exemplary embodiment of the present invention
Positional structure schematic diagram.
Fig. 2 shows the perspective of the centrifugal pre-dedusting device for SCR denitration according to an exemplary embodiment of the present invention
Structural representation.
Fig. 3 shows the sectional view in the A-A directions along in Fig. 1.
Fig. 4 shows the side structure schematic view of square and round joint.
Fig. 5 shows the structural representation for being arranged in parallel two groups of centrifugal pre-dedusting devices.
Fig. 6 is shown in embodiment using the movement locus figure of numerical simulation fly ash granule.
Fig. 7 shows influence curve of the velocity of flue gas to efficiency of dust collection in embodiment.
Description of reference numerals：
10- economizers, 11- economizer exits, the centrifugal pre-dedusting devices of 20-, 21- inlet air stacks, 22- outer tube, 23- are grey
Umbrella cone before bucket, 24- central tubes, 241- expanding reach, 242- cylindrical sections, 25- centrifuge blade units, 251-, 252- cylinders,
Umbrella cone, 254- blades, 30- uptake flues, 31- uptake flue entrances, 40- entrance square and round joint, 50- exporters after 253-
Round splce.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically is chatted
State, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature
It is an example in a series of equivalent or similar characteristics.
The present invention will be carried out specifically for the structure and principle of the centrifugal pre-dedusting device of SCR denitration below
It is bright.
At present, be applied to power plant dedusting technology be divided into gravitational precipitator, inertial dust separator, cyclone dust collectors, cross filter
Dirt technology, electrostatic precipitation technology, wet dust collection technology etc..SCR denitration device is located at the outlet 11 of the economizer of boiler and air preheater
Between entrance, including AIG systems and the reactor with rectifier and beds.According to the structure of SCR denitration device, this
The pre- dedusting of invention is arranged on before economizer exit and reactor relatively more reasonable.Dust removal by filtration technology, electrostatic precipitation technology, wet type are removed
Dirt technology is limited by space and resistance, is not suitable for the pre- dedusting of SCR denitration；And the gravitational dust collection of simple structure is to small particle
The efficiency of dust collection of (less than 30 μm) particle is limited.Comparatively, centrifugal dedusting in rational range of resistance to particle size of fly ash
Range of choice it is bigger, be more suitable for the present invention operating mode.
Specifically, the principle of centrifugal dust removal machine is to make dust-contained airflow rotate, by means of centrifugal force by grit from
Separate in air-flow and along outer wall rotation, then make grit fall into ash bucket by Action of Gravity Field.Under normal operating conditions, grain is acted on
Centrifugal force on son is 5～2500 times of gravity.It is of the invention then developed using the principle be applied to the pre- dedusting of SCR denitration from
Core type dust arrester.Can be used to remove more than 5 μm of dust particle.
Fig. 1 shows the installation of the centrifugal pre-dedusting device for SCR denitration according to an exemplary embodiment of the present invention
Positional structure schematic diagram, Fig. 2 shows the centrifugal pre-dedusting device for SCR denitration according to an exemplary embodiment of the present invention
Perspective structure schematic diagram, Fig. 3 shows the sectional view in the A-A directions along in Fig. 1.
As shown in Figure 1 to Figure 3, exemplary embodiment of the invention, the centrifugal pre- dedusting for SCR denitration
Device 20 is arranged between economizer exit 11 and uptake flue 30, and it includes inlet air stack 21, outer tube 22, ash bucket 23, center
Cylinder 24 and centrifuge blade unit 25.Thus, flue gas stream is entered after the centrifugal pre-dedusting device 20, by clashing into centrifugation leaf
The inertia force that blade unit 25 is produced, and then blade generation centrifugal force is clashed into surrounding, fly ash granule is got rid of to wall, make flying dust edge
Outer tube wall eddy flow and carry out gas solid separation, then ash bucket is fallen into by Action of Gravity Field, purified gas is then entered along central tube
Blast pipe reaches uptake flue.
According to the present invention, the arrival end of outer tube 22 is connected with the port of export of inlet air stack 21, and ash bucket 23 is arranged on outer tube 22
Lower section and connected with outer tube 22 by the outer tube port of export of the bottom of outer tube 22, thus the flying dust in flue gas stream is by air inlet cigarette
The inwall rotation of outer tube 22 is close under the action of the centrifugal force in road 21 after entering, then is fallen in the ash bucket 23 of lower section by Action of Gravity Field
It is collected.
Centrifuge blade unit 25 is arranged on the center line of inlet air stack 21 and including cone and blade 254, cone by
The cylinder 252 of front umbrella cone 251, rear umbrella cone 253 and centre is connected and composed, and blade 254 is uniformly distributed in cylinder
On the external peripheral surface of body 252.Because front umbrella cone 251, rear umbrella cone 253 carry certain cone angle, therefore air-flow enters
To enter be collided in the presence of inertia force after inlet air stack 21 umbrella cone and to surrounding diffusion；Blade 254 is with certain
The straight panel of angle, it is evenly arranged on the external peripheral surface of cylinder 252, and blade 254 is fixed on cylinder 252 and air inlet cigarette
Between road 21, the air-flow for thus spreading can rotate along blade 254, and the centrifugal force that airflow strikes blade 254 is produced will wherein
Fly ash granule get rid of the internal face to outer tube 22 and make flying dust realize gas solid separation along the internal face eddy flow of outer tube 22.Its
In, including the centrifuge blade unit 25 of blade 254 both can be fixed, or can rotate, and be preferably capable rotation
Turn, so as to realize more preferable gas-solid separating effect.
Central tube 24 is arranged on the rear of centrifuge blade unit 25, and the entrance face of central tube 24 is to centrifuge blade unit 25
Arrange and the port of export stretches out from the rear portion of outer tube 22, there is gap between central tube 24 and outer tube 22.In fact, flying dust is in
Adherent rotation in gap between heart cylinder 24 and outer tube 22, enters under gravity the ash bucket 23 connected with the gap then
In, and the purifying smoke after purifying then enters central tube 24 and reaches uptake flue 30.
Wherein, inlet air stack 21 is preferably reamer shape inlet air stack of the arrival end diameter less than port of export diameter, is conducive to
The entrance of flue gas；Outer tube 22 is preferably cylinder outer tube, and central tube 24 is preferably its center cylinder；Also, inlet air stack 21
Center line overlap with the center line of outer tube 22 and the center line of central tube 24.
Preferably, central tube 24 includes flared section 241 and cylindrical section 242, and the arrival end diameter of flared section 241 is less than outlet
End diameter, flared section 241 can be transversal with the link position of outer tube 22 with the link position and inlet air stack 21 of cylindrical section 242
Overlap or misaligned on the direction of face.Wherein, arrange flared section 241 purpose be in order to reduce the area that air-flow takes away flying dust, from
And make the adherent rotation of more flying dusts.
Wherein, due to the generally rectangular cross-section outlet of economizer exit 11, and the arrival end of inlet air stack 21 of dust arrester is general
For round exit, it is therefore desirable to connect entering for economizer exit 11 and inlet air stack 21, i.e. inlet air stack 21 by square and round joint
Mouth end is connected by entrance square and round joint 40 with economizer exit 11；Similarly, go out because the central tube port of export is generally circular in cross section
Mouthful, and the generally rectangular cross-section entrance of uptake flue entrance 31, therefore square and round joint connection central tube 24 and uptake flue 30 are also required to,
I.e. the port of export of central tube 24 is connected by outlet square and round joint 50 with uptake flue 30, and Fig. 4 shows the side-looking of square and round joint
Structural representation, entrance square and round joint 40, the structure of outlet square and round joint 50 are as shown in figure 4, but the invention is not restricted to this.
In order to reach optimal dust removing effects, the cone angle of front umbrella cone is preferably 0～90 °, more preferably 45～60 °；
Afterwards the cone angle beta of umbrella cone is preferably 0～90 °, more preferably 30～45 °；Centrifuge blade unit 25 is apart from inlet air stack 21
The minimum range of arrival end is 0～0.1m., the slanted angle θ between blade 254 and the center line of inlet air stack 21 be 0～
90 °, more preferably 45～60 °；The quantity of blade 254 is preferably 6～12, more preferably 8.
The performance of pre-duster is different because structure is different.Centrifugal pre-duster requires higher air velocity, and gas exists
The speed bumped against before the cone of centrifuge blade unit 25 is higher, and collision rift is higher along the swirl strength of blade 254, then isolate
Dust it is more and efficiency of dust collection is higher.The generally air velocity of economizer exit 11 is and of the invention between 7m/s～20m/s
Centrifugal pre-duster inlet air flow speed be more than 4m/s when can be realized as higher dust removal efficiency, disclosure satisfy that existing
Operating mode.Wherein, all parts of centrifugal pre-dedusting device all have the dimensions ratio, the variation of each proportionate relationship
Efficiency and the pressure loss, those skilled in the art can be affected to be designed according to dust removal requirement and actual condition.
Consider that the pressure loss of the centrifugal pre-dedusting device of the present invention should be controlled in 1000Pa from technology, economic aspects
Hereinafter, from for spatial distribution, multiple tube centrifugal dust remover device in parallel can also be adopted.Specifically, economizer exit 11
Generally rectangular cross-section and depth is two to three times of height, and the inlet air stack arrival end of centrifugal pre-dedusting device is circle, is
Make the air flow method for entering centrifugal pre-dedusting device uniform, therefore can be using the centrifugal pre- dedusting of two or more groups in parallel
Device reaches the purpose in optimization flow field.Also, in order to control resistance, single group deduster is bulky to be unfavorable for spatial distribution, and
Using multigroup parallel way under conditions of identical flow velocity and resistance, volume can be reduced and beneficial to spatial distribution and processing.
Fig. 5 shows the structural representation for being arranged in parallel two groups of centrifugal pre-dedusting devices.As shown in figure 5, working as economizer
When the width of outlet 11 is more than the twice of height, it is arranged in parallel in economizer exit 11 using centrifugal dust collector more than two
Between uptake flue 30.Also, work as and be arranged in parallel in economizer exit 11 and uptake flue using two groups of centrifugal dust collectors
When between 30, the orientation of blade 254 of two groups of centrifugal dust collectors is symmetrical arranged.
The present invention is described further for the centrifugal pre-dedusting device of SCR denitration with reference to specific embodiment.
By taking certain SCR denitration device as an example, economizer exit size is 2.6m × 6.5m.Centrifugal pre- using the present invention removes
Used as the design of the pre- dedusting of denitration, wherein pre-dedusting device is arranged between economizer exit and uptake flue dirt device.
Because the width size of economizer exit is more than 2 times of height dimension, therefore using parallel two-tube centrifugal dust removal device.
1) scheme
Economizer exit is divided into two-way, and first via outlet size is 2.6m × 3.25m, rear access port square and round joint, diameter
For 3.25m.Entrance square and round joint is followed by reamer shape inlet air stack, and maximum gauge is 4m and length is 2.5m.Reamer shape air inlet cigarette
Road is followed by cylinder outer tube, and a diameter of 4m and length are 2.6m.Ash bucket under the port of export of outer tube bottom, ash bucket width is 2.6m
And height is 3m.The cone of centrifuge blade unit is 0.05m apart from the distance of the arrival end of inlet air stack, and cone is by former and later two
The cylinder of umbrella cone and centre is connected to form, wherein the cone angle of front umbrella cone is 55 °, the cone angle beta of rear umbrella cone
For 30 °, a diameter of 1m of cylinder and length is 1m, blade is uniformly distributed on the external peripheral surface of cylinder and is embedded in
Between cylinder and outer tube, blade is 60 ° with the angle theta of center line, and along the external peripheral surface of cylinder 8 are arranged in order.In
Heart cylinder is made up of flared section and cylindrical section, wherein flared section and the link position and inlet air stack of cylindrical section and the connection position of outer tube
Put and overlapped in cross-sectional direction, the length of flared section is 0.05m, and the length of cylindrical section is 3.5m.Central tube is followed by exporter
Round splce, wherein, the second tunnel is identical with the structure of the first via, and difference is that blades arrangement direction is symmetrical with the first via.Exporter
Two-way in parallel centrifugation pre-dedusting device mixing after round splce is followed by uptake flue entrance.
2. result of the test：
(1) numerical simulation calculation
Numerical-Mode is carried out to the Dual-Phrase Distribution of Gas olid inside centrifugal pre-dedusting device 20 by general-purpose computations software FLUENT
Intend, the drag losses of stream field is analyzed, and Particle Trajectory is simulated using Discrete Phase Model (DPM).
Fig. 6 shows in the present embodiment using the movement locus figure of numerical simulation fly ash granule, as seen from Figure 6, flies
Ash particle is collided after cone and blade, gap inward turning of the fly ash granule along outer tube inner wall and between outer tube and central tube
Turn, most of fly ash granule falls under gravity into ash bucket, small part fly ash granule enters central tube and uptake flue.
(2) physical experiments
Correspondence theorem is deferred to completely in hot test, is followed the steps below：
1) ratio 10 of model is determined according to experimental condition:1, according to geometric similarity ratio computation model size and make
Model, and keep as far as possible similar to actual boundary condition.
2) according to the principle of similitude, model test flow velocity is 4m/s, 8m/s, 12m/s, 16m/s and 20m/s.
Table 1 shows the size distribution situation of flying dust in flue gas in the present embodiment, and table 2 shows and simulate in the present embodiment institute
The efficiency of dust collection situation under different flue gas stream speed is obtained, Fig. 7 shows that velocity of flue gas is to efficiency of dust collection in the present embodiment
Influence curve.
In the present embodiment of table 1 in flue gas flying dust size distribution situation
| Particle diameter (μm) | 0～7 | 0～17 | 0～33 | 0～59 | 0～77 | 0～100 |
| Granularmetric composition (%) | 10 | 25 | 50 | 75 | 84 | 100 |
Efficiency of dust collection situation of the simulation gained under different flue gas stream speed in the present embodiment of table 2
Can be seen that flying dust by the model test result of table 1, table 2 and Fig. 7 has significantly deposition in hopper bottom.Test
As shown by data, when the air velocity of economizer exit or the inlet air flow speed of centrifugal pre-dedusting device are more than 4m/s,
Efficiency of dust collection is reachable more than 28%, and flying dust capture rate is raised as operating load is raised, and resistance is raised with load and increased
Greatly.Because the air velocity of economizer exit is typically between 7m/s～20m/s, then the centrifugal pre- dedusting of the application present invention is filled
Between 30%～60%, resistance can preferably keep denitrification apparatus normally to transport to the efficiency of dust collection for postponing in below 500Pa
OK.
In sum, the centrifugal pre-dedusting device simple structure for SCR denitration of the invention and easily fabricated, installation
Maintenance management and equipment investment and operating cost are all relatively low, and can remove in flue gas before SCR catalytic reactions occur
Part flying dust (especially can be used to remove more than 5 μm of particle) and avoid because the flying dust string of deposits comes that flow field is uneven, catalysis
The problems such as agent is blocked and so that denitrification apparatus normally run.
The invention is not limited in aforesaid specific embodiment.The present invention is expanded to and any in this manual disclosed
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (9)
1. a kind of centrifugal pre-dedusting device for SCR denitration, it is characterised in that the centrifugal pre-dedusting device include into
Gas flue, outer tube, ash bucket, central tube and centrifuge blade unit,
The arrival end of the outer tube is connected with the port of export of inlet air stack, and the ash bucket is arranged on the lower section of outer tube and by outer tube
The outer tube port of export of bottom is connected with outer tube；
The centrifuge blade unit is arranged on the center line of inlet air stack and including cone and blade, the cone is by front umbrella
The cylinder of shape cone, rear umbrella cone and centre is connected and composed, and the blade is uniformly distributed in the cylindrical of the cylinder
In perimeter surface；
The central tube is arranged on the rear of centrifuge blade unit, and the entrance face of the central tube is arranged to centrifuge blade unit
And the port of export stretches out from the rear portion of outer tube, there is gap between the central tube and outer tube.
2. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 1, it is characterised in that described centrifugal pre-
Dust arrester is arranged between economizer exit and uptake flue.
3. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 2, it is characterised in that the inlet air stack
Arrival end be connected with economizer exit by entrance square and round joint, the port of export of the central tube by outlet square and round joint with
Uptake flue connects.
4. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 1, it is characterised in that the inlet air stack
For the reamer shape inlet air stack that arrival end diameter is less than port of export diameter, the outer tube is cylinder outer tube, and the central tube is
Its center cylinder, the center line of the inlet air stack overlaps with the center line of the outer tube and the center line of the central tube.
5. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 1, it is characterised in that the central tube bag
Flared section and cylindrical section are included, the arrival end diameter of the flared section is less than port of export diameter.
6. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 1, it is characterised in that the front umbrella cone
The cone angle of body is 0～90 °, and the cone angle of the rear umbrella cone is 0～90 °, the centrifuge blade cell distance inlet air stack
The minimum range of arrival end is 0～0.1m.
7. according to claim 1 be used for SCR denitration centrifugal pre-dedusting device, it is characterised in that the blade with enter
Slanted angle between the center line of gas flue is 0～90 °, and the quantity of the blade is 6～12.
8. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 2, it is characterised in that when the economizer
When the width of outlet is more than the twice of height, it is arranged in parallel in economizer exit using the centrifugal dust collector more than two
Between uptake flue.
9. the centrifugal pre-dedusting device of SCR denitration is used for according to claim 8, it is characterised in that when using two groups of institutes
When stating centrifugal dust collector and being arranged in parallel between economizer exit and uptake flue, the blades arrangement of two groups of centrifugal dust collectors
Direction is symmetrical arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710110462.2A CN106621584A (en) | 2017-02-28 | 2017-02-28 | Centrifugal type pre-dedusting device for SCR (selective catalytic reduction) denitration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710110462.2A CN106621584A (en) | 2017-02-28 | 2017-02-28 | Centrifugal type pre-dedusting device for SCR (selective catalytic reduction) denitration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368744A (en) * | 2019-07-16 | 2019-10-25 | 中山市至善生物科技有限公司 | A kind of expanding dedusting temperature-reducing tower and apparatus for thermal cleavage |
| CN111375245A (en) * | 2018-12-31 | 2020-07-07 | 中国石油化工股份有限公司 | Pipe assembly for connecting gas-liquid cyclone separator and downstream gas phase pipeline |
| CN113117516A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | SCR denitration reactor with ash removal device |
| CN113877412A (en) * | 2021-10-09 | 2022-01-04 | 同兴环保科技股份有限公司 | Flue gas denitration and purification system of alkali recovery boiler in papermaking industry |
| CN114939308A (en) * | 2022-05-17 | 2022-08-26 | 北京华能长江环保科技研究院有限公司 | Pre-dedusting method for pre-deduster of boiler |
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| CN111375245A (en) * | 2018-12-31 | 2020-07-07 | 中国石油化工股份有限公司 | Pipe assembly for connecting gas-liquid cyclone separator and downstream gas phase pipeline |
| CN110368744A (en) * | 2019-07-16 | 2019-10-25 | 中山市至善生物科技有限公司 | A kind of expanding dedusting temperature-reducing tower and apparatus for thermal cleavage |
| CN113117516A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | SCR denitration reactor with ash removal device |
| CN113877412A (en) * | 2021-10-09 | 2022-01-04 | 同兴环保科技股份有限公司 | Flue gas denitration and purification system of alkali recovery boiler in papermaking industry |
| CN114939308A (en) * | 2022-05-17 | 2022-08-26 | 北京华能长江环保科技研究院有限公司 | Pre-dedusting method for pre-deduster of boiler |
| CN114939308B (en) * | 2022-05-17 | 2023-08-25 | 北京华能长江环保科技研究院有限公司 | Pre-dedusting method for pre-deduster of boiler |
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