CN103768935B - CO boiler and flue gas denitration reactor combined unit - Google Patents
CO boiler and flue gas denitration reactor combined unit Download PDFInfo
- Publication number
- CN103768935B CN103768935B CN201210408170.4A CN201210408170A CN103768935B CN 103768935 B CN103768935 B CN 103768935B CN 201210408170 A CN201210408170 A CN 201210408170A CN 103768935 B CN103768935 B CN 103768935B
- Authority
- CN
- China
- Prior art keywords
- flue
- vertical
- boiler
- section
- reactor
- 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.)
- Active
Links
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of CO boiler and Benitration reactor combined unit.Described CO boiler and Benitration reactor are set up in parallel, CO boiler comprises the first vertical flue, horizontal flue and the second vertical flue, evaporator section is arranged at the second vertical flue internal upper part, Benitration reactor is communicated with the second vertical flue with exhaust pass respectively by gas approach, arrange dedusting grid in the below of evaporator section, dedusting grid is relative with denitration reactor inlet flue entrance; Dust stratification plate is set at the inclined downward of dedusting grid, the walling of flue of dust stratification plate least significant end arranges ash discharging hole; Benitration reactor exhaust pass flue vertical with second between dust stratification plate with economizer section is connected.Combined unit of the present invention, can realize, to the denitration of flue gas, better make use of fume afterheat, improve heating efficiency when not affecting and recycling CO residual heat from boiler fume, reduce investment.
Description
Technical field
The present invention relates to the controlling device of oil plant FCC regenerated flue gas, particularly relate to a kind of CO boiler and the flue gas denitration reactor combined unit of administering refinery FCC regenerated flue gas.
Background technology
Nitrogen oxide (NOx) is one of primary pollution source of atmosphere pollution.Nitrogen oxide comprises multiple compounds as nitrous oxide (N
2o), nitric oxide (NO), nitrogen dioxide (NO
2), nitrogen trioxide (N
2o
3), dinitrogen tetroxide (N
2o
4) and dinitrogen pentoxide (N
2o
5) etc.Except nitrogen dioxide, the equal extremely unstable of other nitrogen oxide, meet light, wet or thermal change becomes nitrogen dioxide and nitric oxide, nitric oxide becomes nitrogen dioxide again.Therefore, what contact in occupational environment is that several admixture of gas is often called the smoke of gunpowder (gas), is mainly nitric oxide and nitrogen dioxide, and based on nitrogen dioxide.NOx has toxicity in various degree, is the major reason forming photochemical fog and acid rain based on the NOx of nitric oxide and nitrogen dioxide.NOx in vehicle exhaust and hydrocarbon to react the toxic smog formed through Ultraviolet radiation, are called photochemical fog.In addition, the water in NOx and air reacts the composition that the nitric acid that generates and nitrous acid are acid rain.The harm of NOx to human body is mainly manifested in infringement respiratory tract.
The NOx be discharged in air mainly contains three sources: power plant's (accounting for 46%), vehicle exhaust (accounting for 49%) and oil-refining chemical factory (accounting for 5%).Oil plant is one of main nitrogen oxide (NOx) emission source.130% of NOx amount in FCC flue gas general Zhan Quan factory NOx discharge is the maximum NOx emission source of oil plant.Current FCC gas denitrifying technology mainly comprises: the selective catalytic reduction (SCR method) of gas-phase reaction and SNCR method (SNCR method), liquid absorption method, solid absorption method and high energy electron active oxidation method etc.
Selective catalytic reduction (SCR method) is under catalyst action, utilizes reducing agent selectively to react with the NOx in flue gas, and generates the N of nonhazardous effect
2and H
2the technology of O, its reducing agent can be ammonia, ammoniacal liquor or urea, also can select CO or H
2, also can select Small molecular alkane.SCR technology, compared with other technologies, has denitration efficiency high, the advantages such as thermal discharge is little, technology maturation, is to apply maximum technology in current Flue Gas Denitrification Engineering both at home and abroad.
SNCR method is under the effect not having catalyst, and in the burner hearths of 900 ~ 1100 DEG C, spray into reducing agent (generally using ammonia, ammoniacal liquor or urea), the rapid pyrolysis of reducing agent is NH
3, react with the NOx in flue gas and generate nitrogen and water, in burner hearth, have certain oxygen to exist, the reducing agent sprayed into optionally with NOx, substantially not with oxygen reaction.If FCC apparatus is equipped with CO boiler, SNCR can directly apply.Upstream ammonia being expelled to CO boiler makes NH
3react in CO boiler with NOx.NOx in this method removes scope and is limited in 40-60%.The SOx content height in FCC tail gas it is worth noting, if can cause ammonium sulfate precipitation in CO boiler.NSCR refers to that NOx in source of the gas is under uniform temperature and catalyst action, is reduced agent and is reduced to N
2, simultaneously reducing agent also with the O in source of the gas
2reaction generates H
2o and CO
2, in this denitrification process, reaction need by means of the catalytic action of catalyst, and reducing agent and NOx and O
2all react, non-selectivity, therefore be called non-selective catalytic reduction.
CN1895744A discloses a kind of high dirt composite SCR smoke denitrating technique and denitration catalyst reaction unit, and ammonia nitrogen gaseous mixture enters hydrogen-catalyst reactor top air chamber through deflector, then enters in catalyst layer downwards and be reduced into N
2and H
2o, the flue gas after denitration, by heat exchange, dedusting and desulfurization, is finally discharged from chimney, in the ash bucket that the dust being adsorbed on catalyst surface falls into bottom hydrogen-catalyst reactor in the effect of dust arrester, the row for the treatment of.The weak point of this structure is, meeting blocking catalyst duct, employing is oppositely blown ash and the dust in duct can not be blown off completely.Meanwhile, when catalyst strength is not enough, broken catalyst can block Benitration reactor, causes flue gas to circulate not smooth, and then affects upstream and downstream unit normal run.
CN2014541305U discloses a kind of SCR denitration reactor, and the flue gas after dedusting, desulfurization fully mixes with ammonia at gas approach place, then enters in Benitration reactor shell via reactor inlet, and mist passes through beds, NO
xwith NH
3react under catalyst action, reach the object of denitration.The weak point of this structure is, when processing high cloud of dust gas, soot blower can only clear up the dust stratification on beds surface, and flue gas just directly enters reactor without buffering, and the dust meeting blocking catalyst duct contained in flue gas, has a strong impact on denitration efficiency.Meanwhile, when catalyst strength is not enough, broken catalyst can block Benitration reactor, causes flue gas to circulate not smooth, and then affects upstream and downstream unit normal run.
Summary of the invention
Not enough for prior art, the invention provides the denitrification apparatus of a kind of FCC regenerated flue gas denitration, be intended to solve in prior art when processing high cloud of dust gas, the dust contained in flue gas directly enters the problem of Benitration reactor.
The technical scheme provided of the present invention is:
A kind of CO boiler and flue gas denitration reactor combined unit, described device comprises the CO boiler and Benitration reactor that are set up in parallel, CO boiler comprises the first vertical flue, horizontal flue and the second vertical flue, the two ends of horizontal flue respectively flue vertical with first are communicated with the top of the second vertical flue, combustion chamber is provided with in first vertical flue, in horizontal flue, be provided with steam drum, evaporator section and economizer section are arranged in the second vertical flue; Described Benitration reactor is connected with the second vertical flue of CO boiler with exhaust pass respectively by reactor inlet flue, and arrange dedusting grid in the below of evaporator section, dedusting grid is relative with denitration reactor inlet flue entrance; The inclined downward of dedusting grid arranges dust stratification plate, and the second vertical flue that dust stratification plate lowest part is corresponding is provided with ash discharging hole; The exhaust pass of Benitration reactor between dust stratification plate with economizer section flue vertical with second be connected.
In combined unit of the present invention, described dedusting grid can adopt the conventional structure in the present invention.In the present invention, the dedusting grid that recommendation adopts is the collapser structure of multi-row staggered layout, and the drag force produced when utilizing flue gas to flow through forces flue dust to be separated with flue gas, and collapser angle is 30 ° ~ 120 °, and optimized angle is 60 ° ~ 90 °.Collapser is vertically arranged, leaves exhaust gases passes between adjacent two collapsers, and the opening of collapser is towards denitration reactor inlet flue direction.
In combined unit of the present invention, described Benitration reactor is directly connected with gas approach, is provided with several beds in Benitration reactor, and each beds comprises hanging beam, steam sootblower, catalyst module and catalyst support beam from top to bottom.Adjacent two catalyst bed interlayers leave enough installation and repairing spaces.The general employing of Benitration reactor outlet receives gauge structure, and is connected with exhaust pass by elbow.
In combined unit of the present invention, described reactor inlet flue mainly comprises the horizontal segment and the vertical section parallel with the second vertical flue that flue vertical with second connect, at horizontal segment and vertically between section, and vertically elbow is all adopted to be connected between section with Benitration reactor.Wherein, horizontal section length should ensure have enough walkings and installing space between vertical section and the second vertical flue, and perpendicular straight section height should adjust according to Benitration reactor inner catalyst bed facilities.Described reactor outlet flue one end is connected with Benitration reactor, and the other end is connected with the vertical flue of second below dust stratification plate, and reactor outlet flue adopts incline structure, and the angle of inclination is 5 ° ~ 40 °.
Combined unit of the present invention also comprises ammonia-gas spraying device, and described ammonia-gas spraying device is arranged in the vertical section of denitration reactor inlet flue, near horizontal segment and vertical section connecting bend place, enough mixes distance to guarantee that ammonia and flue gas have.
In combined unit of the present invention, described ammonia-gas spraying device can adopt structure well known to those skilled in the art, such as, can adopt ammonia-spraying grid.In CO boiler of the present invention, in order to increase the mixed effect of flue gas and ammonia further, recommend the spray ammonia hybrid element adopting following structure.Described ammonia-gas spraying device comprises spray ammonia house steward, spray ammonia arm and spray ammonia hybrid element, and described spray ammonia arm arranges some, and spray ammonia arm one end is connected with spray ammonia house steward, and the other end is enclosed construction; Described spray ammonia hybrid element comprises nozzle, anemostat and spatter plate, and the upper surface of spray ammonia arm is connected with described spray ammonia element by nozzle.Anemostat comprises contraction section, trunnion and expansion segment from bottom to top successively, described in spatter plate be individual layer blind plate, spatter the upper end outlet area that plate area is greater than expansion segment, upper end of nozzle outlet is stretched in contraction section, described in spatter the top that plate is arranged at expansion segment.
In combined unit of the present invention, described upper end of nozzle outlet preferably adopts undergauge structure.The angle of throat of described anemostat contraction section is generally 10 ° ~ 60 °, preferably 15 ° ~ 30 °.The length of described trunnion is generally 1 ~ 4 times of throat pipe diameter, preferably 1 ~ 3 times.The angle of flare of described expansion segment for being generally 7 ° ~ 30 °, preferably 10 ° ~ 20 °.
In combined unit of the present invention, in the second vertical flue of described dust stratification plate between Benitration reactor exhaust pass and gas approach, itself and the second vertical flue form hermetically-sealed construction, thus guarantee that flue gas all enters Benitration reactor and carries out denitration process.Described dust stratification plate adopts and is in tilted layout, and its inclination angle is greater than the angle of repose of contained flue dust in flue gas.Different inclination angles can be selected in angle of repose according to different flue dust, and the inclination angle scope of dust stratification plate is generally 5 ° ~ 45 °, and optimized angle is 15 ° ~ 30 °.Second vertical flue is provided with ash discharging hole at the lowest part of dust stratification plate, is arranged outward by the flue dust gathered with regular.
In combined unit of the present invention, preferably between the horizontal segment and vertical section of denitration reactor inlet flue, between vertical section and Benitration reactor, and the connecting bend place between Benitration reactor and exhaust pass is equipped with deflector.Meanwhile, preferably in Benitration reactor, before the first beds, flow straightening grid is set, drainage grid is set in the flue of the second vertical flue and Benitration reactor exhaust pass junction.By the synergy of the deflector of above-mentioned setting, flow straightening grid and drainage grid, stable laminar flow state can be provided for Benitration reactor, evaporator section and economizer section, to ensure denitration efficiency, prevent the escaping of ammonia, ensure the thermal efficiency of evaporator section and economizer.
CO boiler of the present invention and Benitration reactor combined unit are applicable to the denitration processing procedure of ash-laden gas in power plant, oil plant, are particularly useful for the denitration processing procedure of FCC flue gas.
Compared with prior art, CO boiler of the present invention and Benitration reactor combined unit have following outstanding feature:
1, CO boiler of the present invention and flue gas denitration reactor combined unit, CO boiler of the prior art and FCC flue gas denitration reactor are integrated into a combined unit to realize the function of the two, but the two is not adding and relation in simple meaning, but has certain facilitation to each other.In the present invention, Benitration reactor and CO boiler are arranged to combined unit, by the temperature field that CO boiler combustion and heat-obtaining are formed, the temperature spot reacted at suitable SCR arranges Benitration reactor and carries out SCR reaction, because SCR reacts also not heat release of neither absorbing heat, when not affecting recycling CO residual heat from boiler fume, better fume afterheat can be make use of, improve heating efficiency, reduce investment.
2, CO boiler of the present invention and flue gas denitration reactor combined unit, in the below of evaporator section, dedusting grid is set, dedusting grid adopts collapser structure, be arranged vertically in CO boiler, during use, flue gas is close to and is horizontally through dedusting grid, and eddy current is formed on rear side of collapser, the drag force to flue dust utilizing eddy current to produce, flue dust is forced to be separated with flue gas, flue gas enters denitration reactor inlet flue after collapser water conservancy diversion, and flue dust under gravity, the groove along collapser to drop on dust stratification plate and forms gathering, reaches the object of dedusting; Staggered between adjacent two layers dedusting grid, to strengthen flow-disturbing when flue gas flows between dedusting grid, improve ash disposal efficiency, ash-laden gas, can except most flue dust of deentrainment through after multilayer dedusting grid.
3, CO boiler of the present invention and flue gas denitration reactor combined unit, in the vertical section of denitration reactor inlet flue, arrange near horizontal segment and vertical section connecting bend place and spray ammonia element, longer connection flue is utilized to mix place as ammonia and flue gas, guarantee that ammonia and flue gas have and enough mix distance, realize good mixed effect, simultaneously can simplified apparatus structure, reduce investment outlay; Due to connect flue sectional area compared to Benitration reactor and CO boiler flue all much smaller, spray ammonia herein and can guarantee the mixed effect of ammonia and flue gas and being uniformly distributed of ammonia, while can simplified apparatus structure, and to reduce investment outlay.
4, CO boiler of the present invention and flue gas denitration reactor combined unit, ammonia hybrid element is efficiently sprayed in preferred employing, ammonia spurts into the contraction section of anemostat through nozzle, and accelerate at this, tiny structure environment is formed in contraction section, producing swabbing action sucks in contraction section by flue gas, two kinds of gas mediums tentatively mix in contraction section, when the trunnion by reduced cross-sectional area, mist flow velocity is accelerated, thus enter expansion segment with high flow velocities, in expansion segment, gas flow rate slows down and makes the pressure recover of mist to substantially suitable with the pressure of flue gas, realize two kinds of gas first stage mixing.Mist is ejected into via expansion segment outlet and spatters on plate, be blind plate structure owing to spattering plate, the gas of ejection is formed in whirlpool spattering above plate the place of keeping to the side, add mist be not inhaled into anemostat flue gas mix probability again, produce larger dispersion territory, realize mist and mix with the second stage of the flue gas not being inhaled into anemostat, thus further increase the mixture homogeneity of two kinds of gases, reduce the space required for mixing, reduce investment outlay.Described spray ammonia arms parallel is arranged in flue, and nozzle, along the intensive layout in flue cross section, makes each anemostat suction areas overlap, and ensures being uniformly distributed of gas.
5, CO boiler of the present invention and flue gas denitration reactor combined unit, in denitration reactor inlet flue between horizontal segment and vertical section, between vertical section and Benitration reactor, and the connecting bend place between Benitration reactor and exhaust pass is equipped with deflector.Utilize the synergy being provided with flow straightening grid in the Benitration reactor before deflector and the first beds, for Benitration reactor provides stable laminar flow state, ensure denitration efficiency, prevent the escaping of ammonia, simultaneously, ensure that flue gas flows vertically through catalyst duct, reduce system pressure drop, prevent from causing damage to catalyst.Utilize deflector and the synergy that drainage grid is set in the CO boiler of the second vertical flue and Benitration reactor exhaust pass junction, for economizer section provides stable laminar flow state, ensure the thermal efficiency of economizer.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of CO boiler of the present invention and Benitration reactor combined unit.
Fig. 2 is the partial structurtes schematic diagram of dedusting grid of the present invention.
Fig. 3 is the front view that ammonia mixing arrangement is sprayed in the present invention.
Fig. 4 is the front view that ammonia hybrid element is sprayed in the present invention.
Detailed description of the invention
Concrete structure and the occupation mode of combined unit of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, CO boiler provided by the invention and Benitration reactor combined unit comprise CO boiler 1 and Benitration reactor 2.Described CO boiler 1 and Benitration reactor 2 are set up in parallel, and CO boiler comprises flue 3, combustion chamber 4, steam drum 5, evaporator section 6 and economizer section 7; Described flue comprises the first vertical flue 301, horizontal flue 302 and the second vertical flue 303; The two ends of horizontal flue 302 respectively flue 301 vertical with first are communicated with the top of the second vertical flue 303; Combustion chamber 4 is arranged in the first vertical flue 301; Steam drum 5 is arranged in horizontal flue 302; Evaporator section 6 and economizer section 7 are arranged in the second vertical flue 303.Benitration reactor 2 is connected with the second vertical flue 303 of CO boiler with exhaust pass 9 respectively by reactor inlet flue 8, in Benitration reactor 2, be provided with some beds, each beds comprises hanging beam 201, steam sootblower 202, catalyst module 203 and catalyst support beam 204 from top to bottom successively.The below of evaporator section 6 is provided with dedusting grid 10, and dedusting grid 10 is relative with the entrance of denitration reactor inlet flue 8.The inclined downward of dedusting grid 10 arranges dust stratification plate 11, and the second vertical flue that the least significant end of dust stratification plate 11 is corresponding arranges ash discharging hole 12.Ammonia-gas spraying device 13 is arranged in the vertical section of denitration reactor inlet flue 8.The exhaust pass 9 of Benitration reactor between dust stratification plate 11 with economizer section 7 flue 303 vertical with second be connected.Economizer section 7 is positioned at below the outlet of Benitration reactor exhaust pass 9.
As shown in Figure 1, catalyst module in use, by the hanger rail arranged in Benitration reactor, is hung in Benitration reactor by denitrification apparatus of the present invention, and is placed on catalyst support beam, completes the installation of catalyst module.FCC regenerated flue gas Thorough combustion first in a combustion chamber, the CO in removing flue gas, then sequentially pass through the steam drum of CO boiler and evaporator section carries out heat-obtaining, the flue-gas temperature after steam drum and evaporator section heat-obtaining is down to about 330 DEG C; Flue gas after evaporator section heat-obtaining is through dedusting grid, and streamline generation deviation, forms eddy current on rear side of dedusting grid collapser, and eddy current produces the drag force to flue dust, and force flue dust to be separated with flue gas, flue gas is entering denitration reactor inlet flue after collapser water conservancy diversion; And flue dust under gravity, the groove along collapser to drop on dust stratification plate and forms gathering, thus realizes dedusting function.In denitration reactor inlet flue, spray into ammonia by ammonia-gas spraying device, by the longer distance of the vertical section of gas approach, realize fully mixing of flue gas and ammonia, ensure being uniformly distributed of ammonia within the scope of whole reactor cross section.The mist of abundant mixed flue gas and ammonia, after the deflector water conservancy diversion that gas approach elbow is arranged, then enters Benitration reactor after flow straightening grid rectification, and carries out reduction reaction removing NO on a catalyst
x; Flue gas after process is through deflector water conservancy diversion, and after the drainage of drainage grid, the economizer section entered in the second vertical flue continues heat-obtaining, Mist heat recovering; Flue gas after economizer section heat-obtaining, can discharging directly into atmosphere or enter desulfurizer.When in flue gas, dust content increases, when blocking the catalyst duct of Benitration reactor, start steam sootblower and carry out blowing ash; According to the dustiness in flue gas, in the setting ash discharge cycle, by ash discharging hole, the flue dust that dust stratification plate gathers is discharged Benitration reactor.
As shown in Figure 2, apparatus of the present invention preferred dedusting grid adopts the collapser structure of multi-row staggered layout.Collapser is vertically arranged, leaves exhaust gases passes between adjacent two collapsers, and the opening of collapser is towards the direction of denitration reactor inlet flue 8.During use, flue gas is horizontally through collapser dedusting grid, and forms eddy current on rear side of collapser, the drag force to flue dust utilizing eddy current to produce, and force flue dust to be separated with flue gas, flue gas enters flue after collapser water conservancy diversion; Under gravity, the groove along collapser to drop on dust stratification plate and forms gathering flue dust, reaches the object of dedusting; Staggered between adjacent two-layer dedusting grid, to strengthen flow-disturbing when flue gas flows between dedusting grid, improve ash disposal efficiency, ash-laden gas, can except most flue dust of deentrainment through after multilayer dedusting grid.
As shown in Figure 3 and Figure 4, the preferred ammonia-gas spraying device 13 of combined unit of the present invention comprises spray ammonia house steward 1301, spray ammonia arm 1302 and spray ammonia hybrid element 1303; Wherein said spray ammonia arm 1302 arranges some, and spray ammonia arm 1302 one end is connected with spray ammonia house steward 1301, and the other end is enclosed construction.Spray ammonia arm 1302 is connected with spray ammonia hybrid element 1303 by nozzle 1331.Spray ammonia hybrid element 1303 comprises nozzle 1331, anemostat 1332 and spatters plate 1333, nozzle 1331, anemostat 1332 and spatter the dead in line of plate 1333.Described anemostat 1332 comprises contraction section 1334, trunnion 1335 and expansion segment 1336 from bottom to top successively, and nozzle 1331 upper end outlet preferably adopts undergauge structure, and stretches in contraction section 1334, described in spatter the top that plate 1333 is arranged at expansion segment 1336.State plate 1333 for individual layer blind plate, its shape can be circular or polygon, and preferable shape is consistent with anemostat 1332 upper end outlet shape.The area spattering plate 1333 is greater than the upper end outlet area of anemostat 1332.
As shown in Figure 4, ammonia-gas spraying device 13 of the present invention in use, ammonia enters spray ammonia arm 1302 through spray ammonia house steward 1301, the nozzle 1331 of spray ammonia arm 1302 sprays into anemostat contraction section 1334, and accelerates in contraction section 1334, forms negative pressuren zone, produce swabbing action and suck most of flue gas near contraction section 1334 entrance, mist enters anemostat expansion segment 1336 through trunnion 1335, and slows down in expansion segment 1336, realizes the first stage mixing of two kinds of gases; Mist is spattering the generation splash of plate 1333 place, place formed stay whirlpool, add with the flue gas not being inhaled into anemostat 1332 mix probability again, and produce larger dispersion territory, realize mist to mix with the flue gas second stage not being inhaled into anemostat, reach good mixed effect.
Claims (13)
1. a CO boiler and Benitration reactor combined unit, comprise the CO boiler and Benitration reactor that are set up in parallel, CO boiler comprises the first vertical flue, horizontal flue and the second vertical flue, the two ends of horizontal flue respectively flue vertical with first are communicated with the top of the second vertical flue, combustion chamber is provided with in first vertical flue, in horizontal flue, be provided with steam drum, evaporator section and economizer section are arranged in the second vertical flue; Described Benitration reactor is connected with the second vertical flue of CO boiler with exhaust pass respectively by reactor inlet flue, and arrange dedusting grid in the below of evaporator section, dedusting grid is relative with denitration reactor inlet flue entrance; The inclined downward of dedusting grid arranges dust stratification plate, and the second vertical flue that dust stratification plate lowest part is corresponding is provided with ash discharging hole; Exhaust pass flue vertical with second between dust stratification plate with economizer section of Benitration reactor is connected;
Wherein, described dedusting grid is the collapser structure of multi-row staggered layout, and collapser is vertically arranged, the opening of collapser is towards denitration reactor inlet flue direction.
2. according to device according to claim 1, it is characterized in that, be provided with several beds in described Benitration reactor, each beds comprises hanging beam, steam sootblower, catalyst module and catalyst support beam from top to bottom.
3. according to device according to claim 1, it is characterized in that, the angle of described collapser is 30 ° ~ 120 °.
4. according to device according to claim 1, it is characterized in that, described denitration reactor inlet flue comprises the horizontal segment and the vertical section parallel with the second vertical flue that flue vertical with second connect, at horizontal segment and vertically between section, and vertically elbow is all adopted to be connected between section with Benitration reactor; Described exhaust pass one end is connected with Benitration reactor by elbow, and other end flue vertical with second below dust stratification plate is communicated with.
5. according to device according to claim 4, it is characterized in that, described device also comprises ammonia-gas spraying device, and described ammonia-gas spraying device is arranged in the gas approach of Benitration reactor.
6. according to device according to claim 5, it is characterized in that, described ammonia-gas spraying device is arranged in the vertical section of denitration reactor inlet flue, near horizontal segment and vertical section connecting bend place.
7. according to device according to claim 4, it is characterized in that, the exhaust pass of described reactor adopts incline structure, and the angle of inclination is 5 ° ~ 40 °.
8. according to device according to claim 1, it is characterized in that, the inclination angle of described dust stratification plate is greater than the angle of repose of contained flue dust in flue gas.
9. according to device according to claim 8, it is characterized in that, the inclination angle of described dust stratification plate is 5 ° ~ 45 °.
10. according to the device described in claim 5 or 6, it is characterized in that, described ammonia-gas spraying device comprises spray ammonia house steward, spray ammonia arm and spray ammonia hybrid element, and spray ammonia arm arranges some, and spray ammonia arm one end is connected with spray ammonia house steward, and the other end is enclosed construction; Described spray ammonia hybrid element comprises nozzle, anemostat and spatter plate, and the upper surface of spray ammonia arm is connected with described spray ammonia element by nozzle.
11., according to device according to claim 10, is characterized in that, described anemostat comprises contraction section, trunnion and expansion segment from bottom to top successively, and the described plate that spatters is individual layer blind plate, is arranged at the top of expansion segment.
12., according to device according to claim 11, is characterized in that, described in spatter plate area be greater than the upper end outlet sectional area of expansion segment.
13., according to device according to claim 11, is characterized in that, the angle of throat of described anemostat contraction section is 10 ° ~ 60 °, and the length of described trunnion is 1 ~ 4 times of throat pipe diameter, and the angle of flare of described expansion segment is 7 ° ~ 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408170.4A CN103768935B (en) | 2012-10-24 | 2012-10-24 | CO boiler and flue gas denitration reactor combined unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408170.4A CN103768935B (en) | 2012-10-24 | 2012-10-24 | CO boiler and flue gas denitration reactor combined unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103768935A CN103768935A (en) | 2014-05-07 |
| CN103768935B true CN103768935B (en) | 2016-01-06 |
Family
ID=50561974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210408170.4A Active CN103768935B (en) | 2012-10-24 | 2012-10-24 | CO boiler and flue gas denitration reactor combined unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103768935B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485705B (en) * | 2015-06-10 | 2017-11-21 | 无锡华光锅炉股份有限公司 | A kind of reactor frame and economizer backplate integral structure |
| CN106287638B (en) * | 2016-10-13 | 2018-07-27 | 无锡华光工业锅炉有限公司 | The burner structure of rear-mounted steam pipe oven |
| CN109985522B (en) * | 2019-03-21 | 2024-01-05 | 浙江省环境科技有限公司 | SCR flue gas denitration reactor and method embedded in waste heat boiler for cement kiln flue gas denitration |
| CN111330445A (en) * | 2020-04-07 | 2020-06-26 | 福建龙净环保股份有限公司 | SCR denitration system of gas boiler |
| CN112076624B (en) * | 2020-09-15 | 2022-07-08 | 国网山东省电力公司电力科学研究院 | SCR denitration device inlet smoke temperature adjusting system and method |
| CN112178667B (en) * | 2020-10-16 | 2022-03-22 | 南京博沃科技发展有限公司 | Ash field treatment structure for SCR outlet downstream heating surface |
| CN112280929B (en) * | 2020-11-13 | 2024-08-06 | 北京京诚科林环保科技有限公司 | Ash removal device and steelmaking production line |
| CN113091050A (en) * | 2021-04-07 | 2021-07-09 | 贵州黔西中水发电有限公司 | Optimization system combining tail denitration and in-furnace combustion and control method thereof |
| CN116036853B (en) * | 2021-10-28 | 2024-07-02 | 中国石油化工股份有限公司 | Flue gas denitration ammonia spraying mixed dust removal equipment and system |
| CN114682089B (en) * | 2022-04-08 | 2023-05-02 | 西安热工研究院有限公司 | Annular equal-resistance equal-flow ammonia spraying grid with smoke flow self-adaption function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201764834U (en) * | 2010-08-17 | 2011-03-16 | 吴江南玻玻璃有限公司 | Utilization and treatment device for industrial kiln fume |
| CN102430306A (en) * | 2011-09-14 | 2012-05-02 | 无锡华光新动力环保科技股份有限公司 | Pre-dedusting device used in SCR flue gas denitration for coal-fired boiler |
| CN102512953A (en) * | 2011-12-23 | 2012-06-27 | 东方电气集团东方锅炉股份有限公司 | CFB boiler SCR denitration technology and denitration device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8114272B2 (en) * | 2008-09-26 | 2012-02-14 | Exxonmobil Research & Engineering Company | Method for treating refinery waste streams in a fluid catalytic cracking unit and an improved catalytic cracking unit for processing refinery waste streams |
-
2012
- 2012-10-24 CN CN201210408170.4A patent/CN103768935B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201764834U (en) * | 2010-08-17 | 2011-03-16 | 吴江南玻玻璃有限公司 | Utilization and treatment device for industrial kiln fume |
| CN102430306A (en) * | 2011-09-14 | 2012-05-02 | 无锡华光新动力环保科技股份有限公司 | Pre-dedusting device used in SCR flue gas denitration for coal-fired boiler |
| CN102512953A (en) * | 2011-12-23 | 2012-06-27 | 东方电气集团东方锅炉股份有限公司 | CFB boiler SCR denitration technology and denitration device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103768935A (en) | 2014-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103768935B (en) | CO boiler and flue gas denitration reactor combined unit | |
| CN202962277U (en) | Small air quantity constant temperature smoke denitrating device | |
| CN103776042B (en) | A kind of CO boiler with dust-proof denitration function | |
| CN103776014B (en) | A kind of CO boiler with dusting function | |
| CN103768936B (en) | A kind of CO boiler and flue gas denitration reactor combined unit | |
| CN103252163B (en) | Device for removing NOX from smoke by combining ammonia agent spraying and built-in catalytic reaction | |
| CN203002506U (en) | Ammonia spraying device and furnace | |
| CN103776013B (en) | There is the CO boiler of dusting function | |
| CN106823720A (en) | A kind of integrated atmosphere pollution purifier | |
| CN103768930B (en) | The dust-proof Benitration reactor of FCC regenerated flue gas | |
| CN106582286B (en) | Flue gas purification device and method | |
| CN103104927B (en) | Smoke denitration method of carbon monoxide (CO) heat recovery boiler of fluid catalytic cracking (FCC) device | |
| CN202860407U (en) | Full mixing-type ammonia spraying component | |
| CN209564842U (en) | A kind of collaboration of sintering flue gas SCR denitration takes off white device | |
| CN202868648U (en) | Wave type carbon monoxide (CO) boiler with denitration function | |
| CN204735100U (en) | Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler | |
| CN103776043B (en) | A kind of CO boiler with denitration function | |
| CN202868709U (en) | Denitration device applicable to old boiler improvement | |
| CN202113779U (en) | Spiral-flow type ammonia spraying device used for SCR (Selective Catalytic Reduction) denitration system | |
| CN108421383B (en) | Steel pickling waste gas defluorination and denitration device and operation method thereof | |
| CN202387369U (en) | High-efficiency denitration device for pulverized coal boiler | |
| CN102553420B (en) | High-efficiency denitrifying device for pulverized coal boiler | |
| CN206483326U (en) | A kind of type smoke pollutant removal device with turbulent strengthening effect | |
| CN206222345U (en) | A kind of waste heat boiler with denitration function | |
| CN206526661U (en) | A kind of waste heat boiler and Benitration reactor combined unit |
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 |