CN101440959A - Zig air flue K-shaped flow equalizing apparatus with flyash separation - Google Patents
Zig air flue K-shaped flow equalizing apparatus with flyash separation Download PDFInfo
- Publication number
- CN101440959A CN101440959A CN 200810236409 CN200810236409A CN101440959A CN 101440959 A CN101440959 A CN 101440959A CN 200810236409 CN200810236409 CN 200810236409 CN 200810236409 A CN200810236409 A CN 200810236409A CN 101440959 A CN101440959 A CN 101440959A
- Authority
- CN
- China
- Prior art keywords
- flue
- air flue
- gas
- horizontal
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Chimneys And Flues (AREA)
Abstract
A K-type flow equalizing device with flying ash separated flashback air flue comprises a vertical air flue and a horizontal air flue, the lower end of the vertical air flue is provided with a flue-dust retainer and ash discharge device, the position of the vertical air flue turning to the horizontal air flue is provided with a flue gas turning external coating surface composed of delta wing grilles, the adjacent clearance between two delta wing grilles is communicated with the flue-dust retainer, the entrance of the horizontal air flue is distributed transversely with ascending and descending small air flues, the sum of the entrance cross sections of the ascending and the descending small air flues is equal to section area of the horizontal air flue, the ascending and the descending small air flues are alternately arranged inside the horizontal air flue and respectively introduces 50 0.000000lue gas to the upper semi-cross section of the horizontal air flue and 50 0.000000lue gas to the lower semi-cross section of the horizontal air flue. The flying ash described by the present invention is separated into the flue-dust retainer by delta wing grilles, which avoids the flue gas master stream from entering the flue-dust retainer and the flying ash from entering the flue gas by secondary entrainment, the ascending and descending small air flue alternate settings is alternately arranged in the horizontal air flue, the present invention realizes to make the severe oblique flow field distribution after acute steering in ultrashort distance evenly distribute in the whole air flue cross section rapidly.
Description
Technical field
The present invention relates to a kind of in coal-burning boiler high-temperature high dust type flue gas denitrification system key technology, promptly at the ammonia spraying device upstream of flue gas denitrification system by the current equalizer of flue steering horizontal flue vertically downward, be specifically related to a kind of Zag flue K type current equalizer that separates with flying dust.
Background technology
Enter when being arranged in the high dirt type of downstream high temperature flue gas denitrification system from the flue gas of boiler economizer, generally at first to experience racing to, promptly by steering horizontal direction vertically downward.This process need is taked flow equalize technology, and is even with flue gas flow field on the ammonia-gas spraying device spray ammonia cross section that guarantees to arrange following closely.Because herein space is narrow and small, flue gas flow direction be basically 90 ° racing to, and flow equalize technology herein need solve three problems, the one, be in short as far as possible horizontal range basic even flow field on the whole flue cross section, the no recirculating zone of realizing; The 2nd, be in the flue gas steering procedure as much as possible with flue gas in entrained flying dust from flue gas, separate, make it no longer to enter in the equipment in downstream; The 3rd, make Flow Field Distribution keep stable, should significant change not take place along with the variation of unit load (exhaust gas volumn), frequently regulate to avoid ammonia-gas spraying device.The current equalizer of the environmental protection company of specialty design all is to adopt modes such as guide-ring and abrupt-change cross section basically in the world, this mode is all undesirable to solving above-mentioned three problem effects, the main deficiency that has three aspects: 1) flying dust is difficult to separated going out from flue gas, can continue to enter the equipment in downstream along with flue gas, this situation has adverse effect to the operation of Benitration reactor inner catalyst, can cause wearing and tearing, the active passivation of catalyst, the problems such as obstruction of runner; 2) flue gas is turning to back VELOCITY DISTRIBUTION deviation very big, under some operating condition even have a recirculating zone, the requirement of the desired velocity of flue gas distributing homogeneity of inaccessible denitration ammonia-gas spraying device; 3) the velocity of flue gas distribution bias is subjected to unit load (exhaust gas volumn) influence bigger behind the traditional flue gas transfer, and promptly flowing field stability is relatively poor.The variation of unit load causes the velocity of flue gas distribution to change thereupon, and is very unfavorable to the adjusting of downstream ammonia-gas spraying device.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, providing a kind of can separate the relative thicker flying dust of granularity from the flue gas main flow, in minimum distance, under the situation of the serious deviation in flow field, porch, realize current-sharing, eliminate the maelstrom district, reduce turning to the flow resistance that causes with the current-sharing process simultaneously, but also can reduce the Zag flue K type current equalizer that unit load (exhaust gas volumn) changes the band flying dust separation of the even sex sensitiveness of stream field.
For achieving the above object, the technical solution used in the present invention is: comprise the vertical gas pass and the horizontal flue that are connected with flue gas from economizer, be provided with flue-dust retainer and ash exhauster in the lower end of vertical gas pass, the position of said vertical gas pass steering horizontal flue is provided with the flue gas that is made of the dalta wing grid and turns to the outsourcing clad can, gap between the adjacent two dalta wing grids is connected with flue-dust retainer, said horizontal flue porch laterally is evenly equipped with the uplink and downlink bottom flue that is arranged alternately, and the uplink and downlink bottom flue is introduced flue gas first cross section and the following half section of horizontal flue.
The quantity of uplink and downlink bottom flue of the present invention equates; The end of uplink and downlink bottom flue is the enlarging structure, make face mutually bottom flue gradually transition converge, laterally be full of whole horizontal flue; Forming flue gas turns to the quantity of the dalta wing grid of outsourcing clad can be at least two; It is arranged in a straight line that the flue gas that is made of the dalta wing grid turns to the outsourcing clad can or camber line is arranged.
Because flying dust (mainly being than coarse granule) is separated in the bottom flue-dust retainer of relative airless disturbance through the dalta wing grid among the present invention, collect the back and discharge system by ash exhauster, avoided the flue gas main flow to be deep in the flue-dust retainer, the flying dust of having avoided collecting in the flue-dust retainer is entrainmented by secondary and enters flue gas, has realized the purpose of as far as possible flying dust being separated from the flue gas main flow; The uplink and downlink bottom flue is arranged alternately first cross section of flue gas being introduced horizontal flue in horizontal flue and following half section, be implemented in make in the extremely short distance racing backward seriously the Flow Field Distribution of deflection in whole flue cross section, be evenly distributed rapidly.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention, wherein Fig. 1 a be flue gas to turn to the outsourcing clad can be structural representation arranged in a straight line, Fig. 1 b is that flue gas turns to the outsourcing clad can to adopt camber line structure arranged schematic diagram;
Fig. 2 is A-A cutaway view of Fig. 1 of the present invention;
Fig. 3 is B-B cutaway view of Fig. 1 of the present invention;
Fig. 4 is C-C cutaway view of Fig. 1 of the present invention;
Fig. 5 is D-D cutaway view of Fig. 1 of the present invention;
Fig. 6 is the E-E cutaway view of Fig. 2 of the present invention;
Fig. 7 is the F-F cutaway view of Fig. 2 of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1 a, Fig. 1 b, 1 is vertical gas pass, and 2 is the dalta wing grid, and 3 is flue-dust retainer, 4 is horizontal flue, 7 is the flue gas that flows vertically downward, and 8 for entering the flying dust of flue-dust retainer 3 by dalta wing grid 2 under effect of inertia, and 9 is ash exhauster, f1, f3, f5 ... be respectively the slice flue gas stream of guiding first cross section of horizontal flue by up bottom flue into, f2, f4, f6 ... be respectively the slice flue gas stream of guiding half section under the horizontal flue by descending bottom flue into.Flue gas from economizer is connected with vertical gas pass 1 and horizontal flue 4, be provided with flue-dust retainer 3 and ash exhauster 9 in the lower end of vertical gas pass 1, the position of vertical gas pass 1 steering horizontal flue 4 is provided with the flue gas that is made of dalta wing grid 2 and turns to the outsourcing clad can, gap between the adjacent two dalta wing grids 2 is connected with flue-dust retainer 3, horizontal flue 4 porch laterally are evenly equipped with up bottom flue and the descending bottom flue 5 that is arranged alternately, 6, up bottom flue and descending bottom flue 5,6 introduce the slice flue gas that forms first cross section of horizontal flue in the horizontal flue 4 respectively with flue gas flows f1, f3, f5, ... and the slice flue gas of half section flows f2 under the horizontal flue, f4, f6, ....Form flue gas and turn to the quantity of the dalta wing grid 2 of outsourcing clad can be at least two, and to turn to the outsourcing clad can be arranged in a straight line or camber line is arranged by the flue gas that dalta wing grid 2 constitutes.
Referring to Fig. 2,6,7, there is shown the horizontal flue porch and laterally evenly be divided into the slice flue gas passage according to physical dimension, 5 is up bottom flue, 6 is descending bottom flue, flue gas is guided first cross section of horizontal flue into by up bottom flue 5, corresponding slice flue gas stream for f1, f3, f5 ..., guide half section under the horizontal flue into by descending bottom flue 6, corresponding slice flue gas stream for f2, f4, f6 ..., the quantity of up bottom flue and descending bottom flue 5,6 equates.
Referring to Fig. 3, there is shown the outlet of up bottom flue 5, corresponding slice flue gas stream be the outlet of f1, f3, f5 and descending bottom flue 6, corresponding slice flue gas stream be f2, f4, f6 ....The closed area of dash area in horizontal flue, constituting by up bottom flue of alternately arranging and descending bottom flue, inner airless.
Referring to Fig. 4, there is shown the enlarging structure of up bottom flue 5 ends, the enlarging cross section sum of all up bottom flue 5 ends equals the upper half area of horizontal flue, be beneficial to slice flue gas stream (f1, f3, f5 ...) horizontal proliferation in first cross section of horizontal flue.
Referring to Fig. 5, there is shown the enlarging structure of descending bottom flue 6 ends, the enlarging cross section sum of all descending bottom flue 6 ends equals second sectional area of horizontal flue, be beneficial to slice flue gas stream (f2, f4, f6 ...) horizontal proliferation under horizontal flue in the half section.
Operation principle of the present invention is: vertical gas pass 1 steering horizontal Position Design the flue gas that constitutes by dalta wing grid 2 turn to the outsourcing clad can, the flue gas of Liu Donging is limited in transferring horizontal direction to from flowing vertically downward in this outsourcing clad can and flows vertically downward, enter horizontal flue 4, flue-dust retainer 3 is arranged below the dalta wing grid 2, under action of inertia, passing dalta wing grid 2 gaps than fine grained and enter flue-dust retainer 3 in the flue gas than coarse granule and part, dereliction flow perturbation in the flue-dust retainer 3, the flying dust that enters flue-dust retainer 3 can not return in the primary air, by the ash exhauster 9 discharge systems of flue-dust retainer 3 bottoms, realize the separated purpose of flying dust.Dalta wing grid 2 can be designed as arranged in a straight line or camber line is arranged at least two of dalta wing quantity.
The flue gas that enters horizontal flue 4 is in horizontal flue 4 porch, is up slice flue gas stream and descending slice flue gas stream at the width of flue by the even burst of physical dimension by up bottom flue of laterally alternately arranging and descending bottom flue 5,6, up slice flue gas stream and descending slice flue gas fluxion amount equate, flue gas behind the burst is alternately introduced first cross section of horizontal flue and following half section, first cross section of corresponding horizontal flue and following half section flue gas flow point not by thin slice f1, f3, f5 ... with thin slice f2, f4, f6 ... composition.When burst quantity was abundant, the exhaust gas volumn of first cross section of horizontal flue and following half section promptly reached equal, respectively is 50%.After meanwhile flue gas is become the slice flue gas stream of sufficient amount by burst, the pairing width of flow path direction of each thin slice size is dwindled greatly, these slice flue gas (thin slice f1, f3, f5 ... and thin slice f2, f4, f6 ...) each first cross section of comfortable flue and following half section be full of the width of whole flue under the influence of bottom flue enlarging in very short distance, reach even in first cross section of horizontal flue rapidly with second cross-sectional width direction velocity field.
Have Zag flue K type current equalizer that the band flying dust of above feature separates can realize the flue gas racing to, part flying dust in the flue gas is separated and the discharge main smoke airflow, (as L/D＜2) realize current-sharing under the situation of the serious deviation in flow field, porch in minimum distance, have reduced resistance simultaneously.This unique design has also reduced unit load (exhaust gas volumn) simultaneously and has changed the even sex sensitiveness of stream field.
In the use vertical gas pass 1 of the present invention is connected with the flue gas of economizer, horizontal flue 4 links to each other with ammonia-gas spraying device, is communicated with flue gas/ammonia mixing arrangement, Zag flue flow equalizing apparatus and Benitration reactor behind the ammonia-gas spraying device successively.Its basic functional principle is: from the flue gas of economizer during by apparatus of the present invention, the separated discharge of part flying dust system, flue gas transfers horizontal direction to from flowing vertically downward, it is even to reach flow velocity in limited distance on the whole cross section of horizontal flue, enter ammonia-gas spraying device, the ammonia amount is compared extremely trace with exhaust gas volumn, spraying into flue gas behind the ammonia flue gas/ammonia mixing arrangement of flowing through fully mixes, pass through Zag flue flow equalizing apparatus afterwards, flue gas is transferred to vertically downward from horizontal direction once more to flow, flue gas after turning to is evenly distributed on the whole cross section of the bigger vertical gas pass of physical dimension, enter flue gas denitration reactor, nitrogen oxide in the flue gas under the effect of catalyst in reactor with ammonia generation reduction reaction, generate harmless water and nitrogen, realize the purpose of denitrating flue gas, the flue gas that Benitration reactor comes out enters the upstream device air preheater of whole denitrating system.
Claims (5)
1, the Zag flue K type current equalizer that the band flying dust separates, comprise the vertical gas pass (1) and the horizontal flue (4) that are connected with flue gas from economizer, be provided with flue-dust retainer (3) and ash exhauster (9) in the lower end of vertical gas pass (1), it is characterized in that: the position of said vertical gas pass (1) steering horizontal flue (4) is provided with the flue gas that is made of dalta wing grid (2) and turns to the outsourcing clad can, gap between the adjacent two dalta wing grids (2) is connected with flue-dust retainer (3), said horizontal flue (4) porch laterally is evenly equipped with the uplink and downlink bottom flue (5 that is arranged alternately, 6), the uplink and downlink bottom flue (5,6) flue gas is introduced first cross section of horizontal flue (4) and following half section.
2, the Zag flue K type current equalizer of band flying dust separation according to claim 1, it is characterized in that: the quantity of said uplink and downlink bottom flue (5,6) equates.
3, the Zag flue K type current equalizer of band flying dust separation according to claim 1, it is characterized in that: the end of said uplink and downlink bottom flue (5,6) is the enlarging structure, make face mutually bottom flue gradually transition converge, laterally be full of whole horizontal flue.
4, the Zag flue K type current equalizer of band flying dust separation according to claim 1, it is characterized in that: said composition flue gas turns to the quantity of the dalta wing grid (2) of outsourcing clad can be at least two.
5, the Zag flue K type current equalizer of band flying dust separation according to claim 1 is characterized in that: it is arranged in a straight line that the said flue gas that is made of dalta wing grid (2) turns to the outsourcing clad can or camber line is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810236409 CN101440959B (en) | 2008-12-22 | 2008-12-22 | Zig air flue K-shaped flow equalizing apparatus with flyash separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810236409 CN101440959B (en) | 2008-12-22 | 2008-12-22 | Zig air flue K-shaped flow equalizing apparatus with flyash separation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101440959A true CN101440959A (en) | 2009-05-27 |
| CN101440959B CN101440959B (en) | 2011-02-16 |
Family
ID=40725507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810236409 Expired - Fee Related CN101440959B (en) | 2008-12-22 | 2008-12-22 | Zig air flue K-shaped flow equalizing apparatus with flyash separation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101440959B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028298A (en) * | 2013-01-11 | 2013-04-10 | 莱芜钢铁集团有限公司 | Novel oblique grid-type duct collecting pipe |
| CN104119960A (en) * | 2014-07-31 | 2014-10-29 | 新奥科技发展有限公司 | Fly ash separating method |
| CN106390608A (en) * | 2016-11-16 | 2017-02-15 | 东方电气集团东方锅炉股份有限公司 | Pre-dedusting device for SCR denitration |
| CN110542201A (en) * | 2019-09-12 | 2019-12-06 | 珠海格力电器股份有限公司 | Wall-mounted stove |
-
2008
- 2008-12-22 CN CN 200810236409 patent/CN101440959B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028298A (en) * | 2013-01-11 | 2013-04-10 | 莱芜钢铁集团有限公司 | Novel oblique grid-type duct collecting pipe |
| CN104119960A (en) * | 2014-07-31 | 2014-10-29 | 新奥科技发展有限公司 | Fly ash separating method |
| CN106390608A (en) * | 2016-11-16 | 2017-02-15 | 东方电气集团东方锅炉股份有限公司 | Pre-dedusting device for SCR denitration |
| CN106390608B (en) * | 2016-11-16 | 2018-05-25 | 东方电气集团东方锅炉股份有限公司 | A kind of pre-dedusting device for SCR denitration |
| CN110542201A (en) * | 2019-09-12 | 2019-12-06 | 珠海格力电器股份有限公司 | Wall-mounted stove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101440959B (en) | 2011-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101440959B (en) | Zig air flue K-shaped flow equalizing apparatus with flyash separation | |
| EP1975509B1 (en) | Pulverized coal-fired boiler and pulverized coal combustion method | |
| CN101737771B (en) | Multistage over fire air distributing mode | |
| CN105783025B (en) | A method of wind powder distribution in the low NOx tangential firing boilers stove of monitoring | |
| CN112657333B (en) | Ammonia spraying uniform distribution device and denitration ammonia spraying system | |
| UA109719C2 (en) | SOLID-FUEL BURNER AND SOLID-BOILER BOILER | |
| CN102698579B (en) | Ammonia injection and eddy current mixing device and method of flue gas denitrification system | |
| US20170284660A1 (en) | System, method and apparatus for controlling the flow direction, flow rate and temperature of solids | |
| CN105202556A (en) | Boiler tail flue structure capable of adjusting temperature of main steam and reheated steam and flue gas temperature | |
| CN102483230A (en) | Sealpot and method for controlling solids flow rate therethrough | |
| CN203044243U (en) | Smoke denitration ammonia spraying device | |
| CA2587869C (en) | Sncr distribution grid | |
| CN103007750B (en) | Ammonia spraying device for flue gas denitrification | |
| CN100434797C (en) | Combustion technology of low nitrogen oxide | |
| CN101450278B (en) | Whole wing type current sharing and partition adjustable ammonia-gas spraying device | |
| DE102009019966A1 (en) | Suspended particle gasifier has partial quenching chamber above quench tank, with gas outlet geometry separating entrained particles ahead of waste heat recovery boiler | |
| AU2009291291B2 (en) | System for producing synthesis gas | |
| CN101476736B (en) | Zag flue flow equalizing apparatus | |
| CN203571728U (en) | Pulverized coal burner and boiler | |
| CN205379807U (en) | Divide storehouse formula denitration reactor | |
| CN112717691A (en) | Ammonia injection device and design method thereof | |
| CN102580528B (en) | Blast cap type ammonia injection and mixing device for selective catalytic reduction denitration | |
| CN203571727U (en) | Pulverized coal burner and boiler | |
| CN206439848U (en) | The boiler back end ductwork of denitration gas bypass built in a kind of band | |
| CN219389711U (en) | Multi-nozzle preheating burner with fuel mother pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20141222 |
|
| EXPY | Termination of patent right or utility model |