CN208320480U - Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration - Google Patents
Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration Download PDFInfo
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- CN208320480U CN208320480U CN201820390108.XU CN201820390108U CN208320480U CN 208320480 U CN208320480 U CN 208320480U CN 201820390108 U CN201820390108 U CN 201820390108U CN 208320480 U CN208320480 U CN 208320480U
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- 230000003197 catalytic effect Effects 0.000 title claims abstract description 32
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- 238000010168 coupling process Methods 0.000 title abstract description 4
- 238000005859 coupling reaction Methods 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 216
- 239000003546 flue gas Substances 0.000 claims abstract description 106
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000007809 chemical reaction catalyst Substances 0.000 claims abstract description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 65
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- 238000007789 sealing Methods 0.000 claims description 24
- 239000003054 catalyst Substances 0.000 claims description 20
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- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 4
- 229920001774 Perfluoroether Polymers 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 19
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
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- 238000010531 catalytic reduction reaction Methods 0.000 description 4
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- 238000005245 sintering Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000009851 ferrous metallurgy Methods 0.000 description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 230000002153 concerted effect Effects 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical class [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration, which comprises a flue gas main inlet, a reactor main body and a flue gas main outlet in sequence according to the flow direction of flue gas; the reactor main body is internally provided with at least one reaction unit, each reaction unit comprises a first reaction bin and a second reaction bin, the first reaction bin is serially connected with the second reaction bin and is used for containing a CO oxidation reaction catalyst, the second reaction bin is used for containing an SCR reaction catalyst, the first reaction bin is provided with a flue gas inlet communicated with a flue gas main inlet, the second reaction bin is provided with a flue gas outlet communicated with the flue gas main outlet, the first reaction bin and the second reaction bin are arranged side by side and are separated by a first heat conduction plate, and the first reaction bin and the second reaction bin are mutually communicated to form a first flue gas reaction channel allowing flue gas to pass through. The utility model discloses utilize the heat-conducting plate to transmit the SCR reaction zone with the heat that CO oxidation reaction emitted, improve energy utilization, reduce the operating cost that the flue gas reheats.
Description
Technical field
The multi-functional catalytic reactor that the utility model relates to CO catalysis oxidations to couple with SCR denitration, belongs to environment protection field.
Background technique
A large amount of high-temp combustion process is often referred in metallurgy industry, to produce a large amount of nitrogen oxides (NOx),
In Chemical Manufacture, oil gas refining, coal-fired power generation field can also be generated rich in NOxFlue gas.Denitration process refers to generated
NOxIt is reduced to N2, to remove the NO in flue gasx, the technique for comparing mainstream in the world is divided into: SCR and SNCR.
SCR (Selective Catalytic Reduction) selective catalytic reduction denitration technology is the current world
On the gas denitrifying technology that is most widely used, all answered substantially in most of power plant of the countries and regions such as Japan, Europe, the U.S.
With this technology, it does not have by-product, does not form secondary pollution, and apparatus structure is simple, and has removal efficiency high (up to 90%
More than), it is reliable for operation, it is convenient for safeguarding the advantages that.
SCR technology principle are as follows: under the action of catalyst, ammonia is sprayed into the flue gas of certain temperature, by NOxIt is reduced into N2With
H2O.But current SCR catalyst mainly for denitration operating condition be (220 DEG C~420 DEG C) under the conditions of high temperature NOxIt is de-
It removes, and the flue-gas temperature for needing denitration generated in practical metallurgical production process is all relatively low, for example sintering flue gas generally exists
120 DEG C or so, coking flue gas at 200 DEG C or so, in addition these flue gases it may also be desirable to by after the techniques such as dust-removal and desulfurizing
It can enter in SCR reactor, often relatively required denitration reaction temperature is lower for flue-gas temperature at this time, needs to set using heating
It is standby flue gas is heated after be re-fed into SCR reactor, flue gas reheat process needs to consume combustion gas and heats to flue gas, one
As steel industry can all select to carry out flue gas using the mixture combustion of blast furnace gas or blast furnace gas and coke-stove gas it is pre-
Heat, this kind of technical solution are generally used, and certain operating cost can be generated using heating furnace, additionally due to domestic considerable
Steel industry desulphurization denitration project belongs to rear transformation project, since place limitation often results in hot-blast stove small volume, burns
Heating region is shorter, and gas-fired is simultaneously insufficient, therefore the unburned CO gas that will cause suitable content enters in flue gas, a side
Face will cause flue gas emission problem not up to standard when itself too high levels of these CO, and on the other hand, the presence of CO can also be to flue gas
Component measuring device impacts, and interference signal is formed, so that other pollutant emissions are not up to standard in flue gas.It is more significant
Although being CO discharge at present not yet in Ferrous Metallurgy, the industries such as Chemical Manufacture make emission request, for waste incineration row
There is specific CO emission request already, it is believed that higher for CO emission level with the continuous reinforcement of environment protection treating dynamics
Ferrous Metallurgy process also very likely put into effect CO discharge relevant regulations.
Utility model content
For response environment requirement, one of the purpose of this utility model is to provide a kind of CO catalysis oxidation and SCR denitration coupling
The multi-functional catalytic reactor closed, which can make CO catalysis oxidation and the organic concerted reaction of SCR denitration, while can fit
For actual production operating condition, and reaction heat can be made to be utilized effectively.
To achieve the above object, the utility model provides a kind of multi-functional catalysis that CO catalysis oxidation is coupled with SCR denitration
Reactor successively includes flue gas main entrance, reactor body and flue gas general export by the flow direction of flue gas；
It include at least one reaction member inside the reactor body, each reaction member includes being arranged in series
It places the first reaction warehouse of CO oxidation reaction catalyst and places the second reaction warehouse of SCR catalysts, first reaction
Storehouse has the gas inlet that can be connected to with the flue gas main entrance, and second reaction warehouse has to be connected with the flue gas general export
Logical exhanst gas outlet, first reaction warehouse is arranged side by side with second reaction warehouse and is separated with the first heat-conducting plate, and institute
It states the first reaction warehouse and second reaction warehouse is connected with each other to lead to and forms the first smoke reaction channel that permission flue gas passes through.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein second reaction
Storehouse by be disposed therein the transverse slat of lower part be divided into stringer board the first SCR reaction zone being sequentially connected to, the 2nd SCR reaction zone and
3rd SCR reaction zone, the stringer board are the second heat-conducting plate, and the first SCR reaction zone and the 3rd SCR reaction zone are simultaneously arranged
It sets and is separated with second heat-conducting plate, the 2nd SCR reaction zone is located at the first SCR reaction zone and the third
The top of SCR reaction zone, the first SCR reaction zone are connected by diversion elbow with the bottom of first reaction warehouse, institute
The bottom for stating the 2nd SCR reaction zone is connected with the first SCR reaction zone with the 3rd SCR reaction zone respectively, and described
The top of two SCR reaction zones is open towards flue gas main entrance direction；
It is equipped with the first flapper door that can be swung in the gas inlet of first reaction warehouse, first reaction warehouse
The top of gas inlet and the 2nd SCR reaction zone is alternately opened and closed by the reciprocally swinging of the first flapper door；
The the second flapper door that can be swung is equipped in the diversion elbow, the diversion elbow passes through the second flapper door
Reciprocally swinging and open and close；
When the first flapper door closes the gas inlet of first reaction warehouse and opens the 2nd SCR reaction
The top in area, and when the second flapper door closing diversion elbow, the flue gas main entrance, the 2nd SCR are anti-
Area, the 3rd SCR reaction zone and the flue gas general export is answered to be sequentially communicated the second smoke reaction to be formed and flue gas is allowed to pass through
Channel.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein first activity
The both ends of baffle door are respectively the first connecting pin and the first swinging end, first connecting pin be able to rotate with it is described first thermally conductive
Plate upper end connects, and first swinging end can be covered in the top of the 2nd SCR reaction zone or be covered in first reaction
On the smoke inlet in storehouse；The second flapper door both ends are respectively second connection end and the second swinging end, and described second connects
It connects end to be connected with what the diversion elbow inner wall was able to rotate, second swinging end can be overlapped on second heat-conducting plate lower end
Or it is plugged on the diversion elbow.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein the reaction member
It is laid with two or more side by side, the first of the first flapper Men Nengyu of each reaction member adjacent reaction member is living
Dynamic baffle mutually overlaps and is covered in the top of the corresponding 2nd SCR reaction zone or is covered in the cigarette of first reaction warehouse
On gas entrance.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein described first swings
Flexible sealing strip is mounted on end and second swinging end.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein the flexible sealing
Item is that all steel flexible sealing strip, fluoroether rubber flexible sealing strip, flexible sealing strip fluorubber or polytetrafluoroethylene (PTFE) flexibility are close
Strip of paper used for sealing.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein total in the flue gas
Inlet is equipped with deflector and/or arranges grid.
The multi-functional catalytic reactor that CO catalysis oxidation as described above is coupled with SCR denitration, wherein described first is thermally conductive
Plate and second heat-conducting plate are mild steel heat-conducting plate, low-alloy steel heat-conducting plate or metal-plated enamel heat-conducting plate.
In summary, the utility model has following advantageous effects:
1, CO oxidation is integrated into a reactor with SCR denitration reaction by subregion cascade by the utility model,
It can be adjusted according to the demand of actual condition to the relative size of the oxidation reaction zone CO and SCR denitration reaction area, modularized design,
It is conveniently adjusted implementation.
2, the utility model, which reacts CO, and SCR denitration reaction is concatenated is advantageous in that the heat that can use CO oxidation releasing
Amount is conducive to SCR reaction and carries out to flue gas, while it is thermally conductive to use two kinds of spaced advantages of reaction zone to be available with
The heat transfer that plate releases CO oxidation reaction improves capacity usage ratio to SCR reaction zone, reduce operation that flue gas reheats at
This.
3, the short circuit of the oxidation reaction zone CO, this set can be adapted to different in production by the design of flapper door
Working condition, when process upstream flue-gas temperature reaches SCR reaction required temperature, hot-blast stove no longer works, and does not need then at this time
Using the oxidation reaction zone CO, CO reaction zone can be closed by adjusting baffle door, CO oxidation catalyst is saved, extends using the longevity
Life.
4, the utility model also has while handling the potentiality to be exploited of multi-pollutant, and the first SCR reaction zone and the 3rd SCR are anti-
Answer area that can also be arranged to the catalysis abjection area for other pollutants, such as the catalysis oxidation of the organic matters such as VOCs and dioxin
Area, this pollutant catalytic reaction temperature section is close with SCR denitration reaction, can be placed in SCR according to process requirements and cross Cheng Qian
Afterwards.
Detailed description of the invention
Fig. 1 is that CO catalysis oxidation used in the utility model embodiment is reacted with the multi-functional catalysis that SCR denitration couples
A kind of internal perspective view of preferred structure of device.
Fig. 2 is the multi-functional catalytic reactor inside top figure of Fig. 1.
Fig. 3 is internal perspective view of the multi-functional catalytic reactor of Fig. 1 when CO catalysis oxidation area is short-circuited.
Figure label has following meaning:
1- flue gas main entrance；2- reactor body；3- flue gas general export；4- reaction member；The first reaction warehouse of 5-；6- second
Reaction warehouse；The first SCR reaction zone of 61-；The 2nd SCR reaction zone of 62-；The 3rd SCR reaction zone of 63-；The first heat-conducting plate of 7-；8- second
Heat-conducting plate；9- diversion elbow；10- flexible sealing strip；11- the first flapper door；The first connecting pin 111-；112- first is swung
End；12- the second flapper door；121- second connection end；The second swinging end of 122-；13- deflector；14- arranges grid.
Specific embodiment
In order to which the technical characteristics of the utility model, purpose and beneficial effect are more clearly understood, now in conjunction with specific
Embodiment and the technical solution of the utility model is carried out described further below, it should be understood that these examples are merely to illustrate practical
Novel rather than limitation the scope of the utility model.In embodiment, each Starting reagents material is commercially available, and tool is not specified
The experimental method of concrete conditions in the establishment of a specific crime is conventional method and normal condition known to fields, or according to item proposed by apparatus manufacturer
Part.
In the present invention, CO oxidation reaction catalyst is existing catalyst, can be metal-oxide catalysis
Agent is made of the oxide of single metal or various metals.
SCR catalysts are existing catalyst, and operating temperature is 250 DEG C to 400 DEG C, this kind of catalyst can be vanadium titanium
Series catalysts, important activity group are divided into vanadic anhydride and titanium oxide.
The utility model SCR refers to selective catalytic reduction (selective catalytic reduction), using urging
Agent and reducing agent are to NOxThe technology of flue gas progress reduction purification.
The utility model CO catalysis oxidation refer to by using catalyst to toxic gas CO at a lower temperature with oxygen
Catalytic oxidation occurs and generates nontoxic CO2Process.
The multi-functional catalytic reactor that the CO catalysis oxidation that the utility model following embodiment is selected is coupled with SCR denitration
Internal perspective view is as shown in Figure 1, state shown in FIG. 1 is applicable to operating condition (the process upstream cigarette using the oxidation reaction zone CO
When temperature degree is unable to reach SCR reaction required temperature, hot-blast stove needs work).The inside top figure of Fig. 1 is as shown in Figure 2.Fig. 3
For internal perspective view of the multi-functional catalytic reactor when CO catalysis oxidation area is short-circuited of Fig. 1, state shown in Fig. 3 is suitable for
Do not need using the oxidation reaction zone CO operating condition (process upstream flue-gas temperature have reached SCR reaction required temperature when, hot-blast stove is not
Need work).
As shown in Figure 1 to Figure 3, the multi-functional catalysis that CO catalysis oxidation used in following embodiment is coupled with SCR denitration
Reactor successively includes that flue gas main entrance 1, reactor body 2 and flue gas are total by flue gas from the flow direction in upstream to downstream
Outlet 3；It include three duplicate reaction members 4 being set side by side inside the reactor body 2, the quantity of reaction member 4 can
Be set as needed one, two or more, the utility model to this with no restriction.Each reaction member 4 is (by void in Fig. 1
Wire frame outlines) be arranged in series include CO catalysis oxidation area place CO oxidation reaction catalyst the first reaction warehouse 5 and SCR it is anti-
Area is answered to place the second reaction warehouse 6 of SCR catalysts, 5 upper end of the first reaction warehouse is equipped with gas inlet, and lower end is equipped with flue gas
Outlet, for flue gas disengaging, the first reaction warehouse 5 and the second reaction warehouse 6 are arranged side by side and with first 6 upper and lower end of the second reaction warehouse
Heat-conducting plate 7 separates, which is used to giving the heat transfer that CO catalysis oxidation area generates into SCR reaction zone, the first reaction
Storehouse 5 and the second reaction warehouse 6, which are connected with each other to lead to, forms the first smoke reaction channel that permission flue gas passes through.
As shown in Figure 1, the second reaction warehouse 6 is divided into sequentially be connected to with stringer board by being disposed therein the transverse slat of lower part
One SCR reaction zone 61, the 2nd SCR reaction zone 62 and the 3rd SCR reaction zone 63, stringer board are the second heat-conducting plate 8, the first SCR reaction
Area 61 is arranged side by side with the 3rd SCR reaction zone 63 and is separated with the second heat-conducting plate 8, and the 2nd SCR reaction zone 62 is located at institute
The top of the first SCR reaction zone 61 and the 3rd SCR reaction zone 63 is stated, the first SCR reaction zone 61 passes through diversion elbow 9
It is connected with the bottom of first reaction warehouse 5, flue gas is imported into the first SCR reaction zone 61 from the first reaction warehouse 5, water conservancy diversion is curved
9 are formed by extending back bending below 5 warehouse lateral wall of the first reaction warehouse and connecting with second heat-conducting plate 8.2nd SCR is anti-
The bottom in area 62 is answered to be connected respectively with the first SCR reaction zone 61 with the 3rd SCR reaction zone 63, so that flue gas can be according to
It is secondary to flow through the first reaction warehouse 5, the first SCR reaction zone 61, the 2nd SCR reaction zone 62 and the 3rd SCR reaction zone 63 and total by flue gas
3 discharge of outlet.The top of the 2nd SCR reaction zone 62 is open towards flue gas main entrance direction, so that when the first flue gas
When reaction channel is closed, flue gas can be entered by the 2nd SCR reaction zone 62, have the function that keep CO catalysis oxidation area short-circuit, specifically
Content is described in more detail below.
The the first flapper door 11 that can be swung, the first flapper door 11 are equipped in the gas inlet of the first reaction warehouse 5
Both ends be respectively the first connecting pin 111 and the first swinging end 112, the first connecting pin 111 and the first heat-conducting plate 7 is hinged or pivot
It connects, enables the first flapper door 11 with the first connecting pin 111 for axis reciprocally swinging, the first flapper door 11 is in pendulum
Just the top that the 2nd SCR reaction zone 62 is covered in when width both ends is (including but not limited to living with the first of adjacent reaction member
The case where dynamic baffle mutually overlaps) or to be covered on the smoke inlet of the first reaction warehouse 5 (include but is not limited to be overlapped on reactor
The case where mutually being overlapped on the inner wall of main body 2 and with the first flapper of adjacent reaction member) so that first reaction
The top air inlet of the gas inlet in storehouse 7 and the 2nd SCR reaction zone 62 is handed over by the reciprocally swinging of the first flapper door 11
For opening and closing, enter or do not enter the first reaction warehouse 5 to control flue gas.To realize that the first smoke reaction channel and the second flue gas are anti-
The effect for answering channel alternate conduction to close.As shown in Figure 1, in the present embodiment, the first flapper door 11 is reacted with adjacent
First flapper of unit mutually overlaps and is covered in the top of the corresponding 2nd SCR reaction zone.
The the second flapper door 12 that can be swung, 12 both ends of the second flapper door point are equipped in diversion elbow 9
Not Wei second connection end 121 and the second swinging end 122, what the second connection end 121 was able to rotate with 9 inner wall of diversion elbow
It is connected, the second swinging end 122 can be overlapped on 8 lower end of the second heat-conducting plate or be plugged on the inner wall of diversion elbow 9, so that described
Diversion elbow 9 is opened and closed by the reciprocally swinging of the second flapper door 12, is entered with closed first reaction warehouse 5 and control flue gas
Or do not enter the first SCR reaction zone 61.
Under 12 collective effect of the first flapper door 11 and the second flapper door, when the first flapper door 11
It closes the gas inlet of first reaction warehouse 5 and opens the top of the 2nd SCR reaction zone 62, and second active catch
When plate door 12 closes the diversion elbow 9, the flue gas main entrance 1, the 2nd SCR reaction zone 62, the 3rd SCR reaction
Area 63 and the flue gas general export 3 are sequentially communicated the second smoke reaction channel to be formed and flue gas is allowed to pass through, and reaching is catalyzed CO
The effect of zoneofoxidation short circuit.
As shown in Figure 1, Figure 3, mounting guiding board 13 and arrangement grid 14 in the smoke inlet 1, so that flue gas can be equal
It is even into CO catalysis oxidation area (the first reaction warehouse 5) (when CO catalytic oxidation need to be carried out) or to enter SCR anti-
It answers in area (the second reaction warehouse 6) (when without when carrying out CO catalytic oxidation).
Further, in the second pendulum of the first swinging end 112 of the first flapper door 11 and the second flapper door 12
Flexible sealing strip 10 is mounted on moved end 122.Using which, leakage of the flue gas between differential responses area can be reduced.Institute
State flexible sealing strip be existing product, in some embodiments, the flexible sealing strip 10 be all steel flexible sealing strip,
Fluoroether rubber flexible sealing strip, flexible sealing strip fluorubber or polytetrafluoroethylene (PTFE) flexible sealing strip.Preferably polytetrafluoroethylene is flexible
Sealing strip.
Further, the first heat-conducting plate 7 and the second heat-conducting plate 8 are mild steel heat-conducting plate, low-alloy steel heat-conducting plate or metal
Plate enamel heat-conducting plate.It is preferred that metal-plated enamel heat-conducting plate.
The multi-functional catalytic reactor of the utility model is when in use:
State shown in FIG. 1 is applicable to the following example 1 of the operating condition using CO catalysis oxidation area, (the upstream work of example 2
When skill flue-gas temperature is unable to reach SCR reaction required temperature, hot-blast stove needs work), it is mounted in reactor body 2 described
The first flapper door 11 on first heat-conducting plate 7 mutually overlaps two-by-two, so that flue gas initially enters CO catalysis oxidation area,
Without initially entering the SCR reaction zone, be mounted on 9 end of diversion elbow the second flapper door 12 be overlapped on it is described
The bottom end of second heat-conducting plate 8 so that into CO reaction zone reaction after flue gas enter the first SCR reaction zone 61, then according to
It is secondary to pass through the 2nd SCR reaction zone 62, the 3rd SCR reaction zone 63, the flue gas being discharged from the 3rd SCR reaction zone 63 converge after from described
Flue gas general export 3 is discharged.
State shown in Fig. 3 is suitable for not needing following example 3 (the process upstream cigarette of the operating condition using the oxidation reaction zone CO
Temperature degree can reach SCR reaction required temperature when, hot-blast stove does not need work), can state as shown in Figure 1 change to obtain,
9 end of direction and diversion elbow for the first flapper door 11 that change is arranged on first heat-conducting plate 7 can be passed through
Second flapper door, 12 direction obtains the reactor of the state.
Specifically, being located at the first flapper door in reactor on the heat-conducting plate 7 of first piece first of the leftmost side in Fig. 3
11 are overlapped on reactor wall with the CO catalysis oxidation area of the closed leftmost side, and second piece of first heat-conducting plate and third block first are thermally conductive
The first flapper door 11 mutually overlap joint of plate, to open left side SCR reaction zone, while closed intermediate CO catalysis oxidation area, the
The first flapper door 11 mutually overlap joint of four piece of first heat-conducting plate and the 5th piece of the first heat-conducting plate, with open intermediate and right side
SCR reaction zone, while closed right side CO catalysis oxidation area；And left side, centre, respectively it is arranged in back bending in the reaction member of right side
Second flapper door 12 is respectively overlapped on the first heat-conducting plate 7 vacantly in the diversion elbow 9, described in bottom end closure
CO catalysis oxidation area, the open SCR region, the first exhaust gases passes closing in the reactor, the second exhaust gases passes are led at this time
Logical, whole CO catalysis oxidations area short circuit, flue gas cannot be introduced into the area, and flue gas is directly entered the SCR reaction zone, from this after reaction
Area's discharge.
Example 1
Under certain operating condition, flue gas temperature~170 DEG C before entering hot-blast stove, by being~230 DEG C after hot-blast stove, cigarette
CO content is~6500ppm, NO in gasxFor~300mg/Nm3, exhaust gas volumn is~110000Nm3/h.The present embodiment uses such as Fig. 1
The multi-functional catalytic reactor of shown state has 3 repetition reaction members in the reactor.
Reactor under the state, CO catalysis oxidation area is in running order, and the movable end of baffle door installs polytetrafluoroethyl-ne
Alkene flexible sealing strip, to reduce leakage of the flue gas between differential responses area；
Flue gas is introduced by CO catalysis oxidation area 211, CO catalysis oxidation area 211 is reacted with the 3rd SCR
The first heat-conducting plate between area 2123 and the first SCR reaction zone, the first SCR reaction zone are reacted with the 2nd SCR
The second heat-conducting plate between area selects plating enamel carbon steel, and flue gas smoke temperature behind CO catalysis oxidation area 211 rises to~
245 DEG C, flue gas goes successively to the SCR reaction zone 212, i.e., successively passes through the first SCR reaction zone 2121, the 3rd SCR reaction zone
2123 and the 2nd after SCR reaction zone 2122, completes denitrification process, CO content in smoke is down to 100ppm hereinafter, NO at this timexContent
50mg/Nm can be down to3Below.
Example 2
Under another operating condition, flue gas temperature~170 DEG C before entering hot-blast stove, by being~290 DEG C after hot-blast stove,
CO content in smoke is~3200ppm, NOxFor~300mg/Nm3, exhaust gas volumn is~110000Nm3/h.The present embodiment is using such as
The multi-functional catalytic reactor of state shown in Fig. 1 has 3 repetition reaction members in the reactor.
Reactor under the state, CO catalysis oxidation area is in running order, and the movable end installation fluorubber of baffle door is soft
Property sealing strip, to reduce leakage of the flue gas between differential responses area；
It introduces flue gas and passes through CO catalysis oxidation area, CO catalysis oxidation area and the 2nd SCR reaction zone and institute
The first heat-conducting plate between the first SCR reaction zone is stated, between the first SCR reaction zone and the 2nd SCR reaction zone
Two heat-conducting plates select low-alloy steel, and flue gas smoke temperature behind CO catalysis oxidation area rises to~245 DEG C, flue gas continue into
Enter the SCR reaction zone, i.e., successively pass through the first SCR reaction zone, after the 2nd SCR reaction zone and the 3rd SCR reaction zone, completes de-
Nitre process, CO content in smoke is down to 100ppm hereinafter, NOx content can be down to 15mg/Nm at this time3Below.
Example 3
Under certain another operating condition, flue gas temperature~250 DEG C before entering hot-blast stove have reached denitrating catalyst work
Temperature requirement, CO content in smoke are~1000ppm, NOxFor~800mg/Nm3, exhaust gas volumn is~220000Nm3/h.This implementation
Example uses the multi-functional catalytic reactor of state shown in Fig. 3, has 3 repetition reaction members in the reactor.
Reactor under the state, CO catalysis oxidation area short-circuit condition, the movable end installation fluoroether rubber sealing of baffle door
Item reduces leakage of the flue gas between different catalysts storehouse；
It introduces flue gas to react by the SCR, CO catalysis oxidation area and the 3rd SCR reaction zone and described first
The first heat-conducting plate between SCR reaction zone, second between the first SCR reaction zone and the 2nd SCR reaction zone are thermally conductive
Plate selects mild steel, completes denitrification process, NOxContent can be down to 150mg/Nm3Below.
The utility model is not a large amount of abundant in view of steel industry flue gas is produced during being reheated using hot-blast stove
The CO of burning, while the technical issues of need SCR denitration, CO catalysis oxidation and SCR denitration reaction coupling integration is anti-in one
Device is answered, CO oxidation is integrated into a reactor with SCR denitration reaction by subregion cascade, which can be according to reality
The demand of operating condition adjusts to the relative size of the oxidation reaction zone CO and SCR denitration reaction area, and modularized design is conveniently adjusted reality
It applies.In addition, using CO catalysis oxidation area and SCR denitration reaction area is arranged side by side and heat-conducting plate is connected and used by back bending
Mode, the heat that CO oxidation can be made to release is conducive to SCR reaction and carries out, improve capacity usage ratio, reduce to flue gas
The operating cost that flue gas reheats.
The short circuit of the oxidation reaction zone CO, this set can be adapted to give birth to by the design of the flapper door of the utility model
Different working condition in production, when process upstream flue-gas temperature reaches SCR reaction required temperature, hot-blast stove no longer works, this
Shi Ze is not needed using the oxidation reaction zone CO, can close CO reaction zone by adjusting baffle door, and saving CO oxidation catalyst makes
Use the service life.
In addition, the first SCR reaction zone of the utility model or the 3rd SCR reaction zone replace with VOCs catalysis oxidation area
Or dioxin catalysis oxidation area.Above-mentioned VOCs catalysis oxidation area loads VOCs oxidation catalyst, such catalyst is existing catalysis
Agent, above-mentioned dioxin catalysis oxidation area load dioxin oxidation catalyst, such catalyst is existing catalyst.Due to this kind of dirt
It is close with SCR denitration reaction to contaminate object catalytic reaction temperature section, can be placed according to process requirements before and after SCR process.
On the other hand, the multi-functional catalytic reactor that the utility model CO catalysis oxidation is coupled with SCR denitration is in passing through
High temperature SCR reacts the application in purifying smoke.
Preferably, the flue gas is the sintering flue gas or coking flue gas containing CO or without containing CO.It is highly preferred that described contain
CO and NOxSintering flue gas or coking flue gas be mixture combustion pair using blast furnace gas or blast furnace gas and coke-stove gas
What flue gas generated after being preheated.
Finally, it is stated that: above embodiments are merely to illustrate the implementation process and feature of the utility model, rather than limit
The technical solution of the utility model, although the utility model is described in detail referring to above-described embodiment, this field it is general
Logical technical staff is it is understood that can still be modified or replaced equivalently the utility model, without departing from originally practical new
Any modification or partial replacement of the spirit and scope of type should all cover in the protection scope of the utility model.
Claims (8)
1. a kind of multi-functional catalytic reactor that CO catalysis oxidation is coupled with SCR denitration is successively wrapped by the flow direction of flue gas
Include flue gas main entrance, reactor body and flue gas general export；It is characterized in that,
It include at least one reaction member inside the reactor body, each reaction member includes the placement being arranged in series
First reaction warehouse of CO oxidation reaction catalyst and the second reaction warehouse for placing SCR catalysts, the first reaction warehouse tool
There is the gas inlet that can be connected to the flue gas main entrance, second reaction warehouse has the cigarette being connected to the flue gas general export
Gas outlet, first reaction warehouse are arranged side by side with second reaction warehouse and are separated with the first heat-conducting plate, and described first
Reaction warehouse and second reaction warehouse, which are connected with each other to lead to, forms the first smoke reaction channel that permission flue gas passes through.
2. the multi-functional catalytic reactor that CO catalysis oxidation according to claim 1 is coupled with SCR denitration, feature exist
In, second reaction warehouse by be disposed therein the transverse slat of lower part be divided into stringer board the first SCR reaction zone being sequentially connected to,
2nd SCR reaction zone and the 3rd SCR reaction zone, the stringer board are the second heat-conducting plate, the first SCR reaction zone and the third
SCR reaction zone is arranged side by side and is separated with second heat-conducting plate, and it is anti-that the 2nd SCR reaction zone is located at the first SCR
The top in area Yu the 3rd SCR reaction zone is answered, the first SCR reaction zone passes through diversion elbow and first reaction warehouse
Bottom is connected, the bottom of the 2nd SCR reaction zone respectively with the first SCR reaction zone and the 3rd SCR reaction zone
It is connected, the top of the 2nd SCR reaction zone is open towards flue gas main entrance direction；
The the first flapper door that can be swung, the flue gas of first reaction warehouse are equipped in the gas inlet of first reaction warehouse
The top of import and the 2nd SCR reaction zone is alternately opened and closed by the reciprocally swinging of the first flapper door；It is described
The the second flapper door that can be swung is equipped in diversion elbow, the diversion elbow is reciprocal by the second flapper door
It swings and opens and closes；
When the first flapper door closes the gas inlet of first reaction warehouse and opens the 2nd SCR reaction zone
Top, and the second flapper door close the diversion elbow when, the flue gas main entrance, the 2nd SCR reaction zone,
The 3rd SCR reaction zone and the flue gas general export are sequentially communicated the second smoke reaction channel to be formed and flue gas is allowed to pass through.
3. the multi-functional catalytic reactor that CO catalysis oxidation according to claim 2 is coupled with SCR denitration, feature exist
In the both ends of the first flapper door are respectively the first connecting pin and the first swinging end, and first connecting pin is able to rotate
Connect with first heat-conducting plate upper end, first swinging end can be covered in top or the envelope of the 2nd SCR reaction zone
It is placed on the smoke inlet of first reaction warehouse；The second flapper door both ends are respectively second connection end and the second pendulum
Moved end, the second connection end are connected with what the diversion elbow inner wall was able to rotate, and second swinging end can be overlapped on institute
It states the second heat-conducting plate lower end or is plugged on the diversion elbow.
4. the multi-functional catalytic reactor that CO catalysis oxidation according to claim 3 is coupled with SCR denitration, feature exist
In the reaction member is laid with two or more side by side, and the first flapper Men Nengyu of each reaction member is adjacent
First flapper of reaction member mutually overlaps and is covered in the top of the corresponding 2nd SCR reaction zone or is covered in institute
On the smoke inlet for stating the first reaction warehouse.
5. the multi-functional catalytic reactor that CO catalysis oxidation according to claim 4 is coupled with SCR denitration, feature exist
In being mounted on flexible sealing strip on first swinging end and second swinging end.
6. the multi-functional catalytic reactor that CO catalysis oxidation according to claim 5 is coupled with SCR denitration, feature exist
In the flexible sealing strip is all steel flexible sealing strip, fluoroether rubber flexible sealing strip, flexible sealing strip fluorubber or poly-
Tetrafluoroethene flexible sealing strip.
7. CO catalysis oxidation according to any one of claim 1 to 6 is reacted with the multi-functional catalysis that SCR denitration couples
Device, which is characterized in that be equipped with deflector at the flue gas main entrance and/or arrange grid.
8. the CO catalysis oxidation according to any one of claim 2 to 6 is reacted with the multi-functional catalysis that SCR denitration couples
Device, which is characterized in that first heat-conducting plate and second heat-conducting plate are mild steel heat-conducting plate, low-alloy steel heat-conducting plate or gold
Belong to plating enamel heat-conducting plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820390108.XU CN208320480U (en) | 2018-03-21 | 2018-03-21 | Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration |
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| CN201820390108.XU CN208320480U (en) | 2018-03-21 | 2018-03-21 | Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108310972A (en) * | 2018-03-21 | 2018-07-24 | 中冶京诚工程技术有限公司 | Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration and application thereof |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108310972A (en) * | 2018-03-21 | 2018-07-24 | 中冶京诚工程技术有限公司 | Multifunctional catalytic reactor for coupling CO catalytic oxidation and SCR denitration and application thereof |
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