CN215388737U - Mixing unit and denitration system using same - Google Patents
Mixing unit and denitration system using same Download PDFInfo
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- CN215388737U CN215388737U CN202121540586.2U CN202121540586U CN215388737U CN 215388737 U CN215388737 U CN 215388737U CN 202121540586 U CN202121540586 U CN 202121540586U CN 215388737 U CN215388737 U CN 215388737U
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- denitration
- flue gas
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- absorbent
- flue
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- 239000003546 flue gas Substances 0.000 claims abstract description 75
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 59
- 239000002250 absorbent Substances 0.000 claims abstract description 54
- 230000002745 absorbent Effects 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 19
- 230000000630 rising effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 239000002594 sorbent Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000001174 ascending effect Effects 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004231 fluid catalytic cracking Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a mixing unit and a denitration system using the same. The mixing unit is used for reducing denitration agent and SO in a flue of a denitration system3The absorbent and the smoke are mixed, and the method comprises the following steps: the air lift cylinders are uniformly arranged in the flue at intervals and are used as denitration reducing agent and SO3Sorbent and flue gas providing mixingA space; a mixing blade provided in the flue gas rising passage of the gas lift cylinder, the mixing blade rotating around the axis by the lift force of the flue gas to denitrify the reducing agent and SO3The absorbent and the flue gas are mixed in the flue gas uptake channel. The utility model can not only reduce the denitration reductant and SO3The absorbent and the flue gas are effectively mixed, and the denitration reducing agent and SO can be saved3An installation space of the absorbent injection device.
Description
Technical Field
The utility model relates to the technical field of petrochemical flue gas treatment, in particular to a denitration reducing agent and SO3Absorbent and flue gas's mixing unit and applied this mixing unit's deNOx systems.
Background
The selective catalytic reduction denitration technology (SCR) takes ammonia as a reducing agent, and the ammonia reacts with NOx in flue gas to generate nitrogen and water under the condition of a catalyst and a certain temperature. The FCC spent catalyst generates SO during the regeneration process2And SO3The ratio of the SO to the NOx is about 8-12: 1, and about 0.5-2% of SO is still available after SCR denitration2Is oxidized into SO3。SO3The presence of which exacerbates the possibility of corrosion and fouling of downstream equipment, SO3And a denitration reducing agent NH3Can react to generate NH under low temperature environment4HSO4(ABS), the presence of ABS (adhesion at low temperatures) is liable to cause plugging of catalyst channels, and ABS also adheres to equipment surfaces causing ash deposition, fouling and corrosion. When SO in flue gas3When the concentration reaches more than 10ppm, the phenomenon of 'blue smoke' appears around the chimney. SO in the present flue gas3Can adopt alkaline absorbent to spray and remove SO3The technique is to utilize an alkaline absorbent and SO in the flue gas3Reacting to remove SO in the flue gas3The method can realize the SO in the flue gas at the front part of the device3Thereby alleviating its adverse effects on subsequent equipment. Considering that in the flue gas denitration process, denitration reducing agent and SO are required to be added3The absorbent and the flue gas are mixed, so a certain space is needed for installing an injection device of the denitration reducing agent, and a certain space and a mixed internal member are needed to enable the flue gas and the reducing agent to reach the ideal conditionThe mixing effect of (1).
Chinese patent CN208553733U discloses a system for removing sulfur trioxide from flue gas by using an alkali reagent, which comprises a reactor, wherein a first flue is arranged on the upper part of the reactor, the first flue is bent from the top and then is connected with a second flue vertically downwards, the joint of the second flue and the first flue is a right angle, an alkali reagent injection system is further arranged at the second flue, the alkali reagent injection system comprises a storage bin, a screw feeder with a meter is arranged at the lower part of the storage bin, the screw feeder with the meter is connected with a pneumatic conveying inlet pipe through a pipeline, one end of the pneumatic conveying inlet pipe is connected with a dilute ammonia pipe, the dilute ammonia is connected with an ammonia spraying grid in the flue, the ammonia spraying grid is uniformly arranged in the flue through a plurality of nozzles, and a compressed pneumatic conveying device is further arranged on the pipeline between the screw feeder with the meter and the pneumatic conveying inlet pipe, the other end is connected with a plurality of injection nozzles, the injection nozzles are arranged in the main pipeline of the ammonia injection grid, and a flow deflector is arranged at the joint of the second flue and the first flue. The system can ensure that the alkali reagent and the ammonia gas are uniformly sprayed into the flue through the ammonia spraying grid, and the denitration reducing agent and the SO can be sprayed into the flue3The absorbent and the flue gas are mixed, but the system needs a long flue space for installing SO3The absorbent injection device is used as a mixing space of the absorbent and the smoke.
Therefore, there is a need for a denitration reducing agent and SO3The mixing effect of the absorbent and the flue gas can effectively save the mixing unit of the installation and mixing space, thereby overcoming the defects in the prior art.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a mixing unit and a denitration system using the same, wherein a denitration reducing agent and SO can be used3Absorbent agentAnd flue gas is effectively mixed, and denitration reducing agent and SO can be saved3An installation space of the absorbent injection device.
To achieve the above object, according to a first aspect of the present invention, there is provided a mixing unit for mixing a denitration reducing agent, SO, in a flue of a denitration system3The absorbent and the smoke are mixed, and the method comprises the following steps: the air lift cylinders are uniformly arranged in the flue at intervals and are used as denitration reducing agent and SO3The absorbent and the flue gas provide a mixing space; a mixing blade provided in the flue gas rising passage of the gas lift cylinder, the mixing blade rotating around the axis by the lift force of the flue gas to denitrify the reducing agent and SO3The absorbent and the flue gas are mixed in the flue gas uptake channel.
Furthermore, in the above technical solution, the middle lower part of the lift cylinder may be provided with an annular protrusion, and the lower edge of the annular protrusion is provided with a denitration reducing agent inlet and an SO3An absorbent inlet, the denitration reductant inlet and SO3The absorbent inlet is in communication with the flue gas uptake passage.
Further, in the above technical scheme, the denitration reducing agent inlet and the SO3The sorbent inlets may be symmetrically disposed relative to the central axis of the flue gas uptake channel.
Further, among the above-mentioned technical scheme, mixing blade can set up to the multiunit and be the heliciform along the axial of flue gas uptake passageway and extend.
Furthermore, among the above-mentioned technical scheme, the quantity of every group mixing blade can be two, and every group mixing blade end to end, and the mixing blade that fuses is whole to be spiral rising form.
Further, in the above technical scheme, a sealing plate can be arranged in the flue perpendicular to the rising direction of the flue gas, the sealing plate is fixed on the inner wall surface of the flue, and the gas lift cylinder is arranged and fixed on the sealing plate.
Further, in the above technical scheme, the sealing plate can be arranged at a corresponding position of the annular protrusion, and the thickness of the sealing plate is adapted to the height of the annular protrusion.
Furthermore, in the above technical scheme, one side outside the flue can be provided with a flueWith SO3An absorbent supply line, the SO3The absorbent supply pipeline is respectively connected with the SO of each row of the lift cylinders through a plurality of first branch pipes3The absorbent inlets are communicated.
Further, in the above technical solution, a denitration reducing agent supply pipe may be disposed at the other side outside the flue, and the denitration reducing agent supply pipe is respectively communicated with the denitration reducing agent inlet of each row of the inflator through a plurality of second branch pipes.
According to a second aspect of the utility model, the utility model provides a denitration system, which comprises the mixing unit, wherein the mixing unit is used for mixing the denitration reducing agent and SO in a flue of the denitration system3Mixing the absorbent and the flue gas; the deNOx systems still includes: and the denitration catalyst bed layer is arranged at the downstream position of the flue gas of the mixing unit and is used for receiving the flue gas mixed by the mixing unit and the denitration reducing agent.
Compared with the prior art, the utility model has the following beneficial effects:
1) the novel mixing unit for practical use can be provided with the denitration reducing agent and the SO at the lower edge of the bulge part by arranging the annular bulge part on the air lift cylinder3The inlet of the absorbent not only saves space, but also can strengthen denitration reducing agent and SO3The mixing effect of the absorbent and the flue gas;
2) by arranging the mixing blades in the flue gas ascending channel of the gas ascending cylinder, the denitration reducing agent and SO can be further enhanced3The mixing effect of the absorbent and the flue gas;
3) the mixing unit has simple structure and small occupied space, and is easy to reform in the limited space of the original boiler flue.
4) The denitration catalyst bed layer is arranged at the downstream position of the flue gas of the mixing unit, and SO can be processed at the front end of the mixing unit3The corrosion on subsequent equipment is effectively reduced by fully absorbing.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic sectional view of a mixing unit of the present invention.
FIG. 2 is a schematic top view of the mixing unit of the present invention (showing the chimney, flue, and denitration reductant and SO in the mixing unit)3An absorbent supply conduit).
FIG. 3 is a schematic view of the denitration system according to the present invention.
Description of the main reference numerals:
1-mixing unit, 11-chimney, 110-flue gas uptake channel, 111-annular projection, 112-SO3An absorbent inlet, 113-a denitration reducing agent inlet, 2-a flue, 20-a sealing plate and 3-SO3The denitration catalyst comprises an absorbent supply pipeline, a 31-first branch pipe, a 4-denitration reducing agent supply pipeline, a 41-second branch pipe and a 5-denitration catalyst bed layer.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
The denitration system provided by the utility model is an FCC (fluid catalytic cracking) regenerated flue gas denitration system and has the function of removing SO in a coordinated manner3The function of (c).
Example 1
The mixing unit of the embodiment is used for mixing denitration reducing agent and SO in the flue of the denitration system3The absorbent and the flue gas are mixed. SO (SO)3The absorbent can be one or a compound solution of sodium bicarbonate, sodium bisulfite and sodium carbonate, and the denitration reducing agent can be a mixed gas of ammonia gas and air. The mixing unit 1 includes a gas lift cylinder 11 and a mixing blade 12. The lift cylinders 11 are arranged in the flue 2 at regular intervals (see fig. 2), and may be arranged in rows, and a plurality of lift cylinders 11 may be provided for each row, and the lift cylinders 11 may be denitration reducing agent, SO3The sorbent and the flue gas provide a mixing space. The mixing blade 12 is arranged in the flue gas ascending channel 110 of the gas ascending cylinder 11, the mixing blade 12 can rotate around the shaft by the lifting force of the flue gas to denitrate the reducing agent and SO3The sorbent and the flue gas are mixed in the flue gas uptake channel 110.
As further shown in fig. 1, preferably, but not limitatively, the middle-lower part of the lift cylinder 11 may be provided with an annular protrusion 111, and the lower edge of the annular protrusion 111 is provided with SO3 Absorbent inlet 112 and denitration reductant inlet 113, SO3The absorbent inlet 112 and the denitration reducing agent inlet 113 are in communication with the flue gas rising passage 110. Further, in order to make SO3Absorbent, denitration reducing agent and flue gas are mixed more fully and are convenient for arranging pipeline, SO3 Absorbent inlet 112 and stripperThe nitroreducer inlet 113 may be positioned in an opposite side, i.e. SO3The absorbent inlet 112 and the denitration reducing agent inlet 113 are symmetrically disposed with respect to the axial direction of the flue gas ascent passage 110 as a center (refer to fig. 2).
As further shown in fig. 1, the entirety of the mixing blade 12 extends helically in the axial direction of the flue gas uptake channel 110. The mixing blades 12 may be designed in groups of two blades per group of mixing blades 12, the two blades being arranged anti-symmetrically with respect to the axis. Each group of mixing blades 12 are connected end to end, and the whole of the integrally connected mixing blades is in a spiral rising shape. The mixing blades 12 can be fixed in the gas lift cylinder 11 in various ways, for example, ring bearings can be arranged at two ends of the rotating shaft of the blades, the bearings are fixed on the inner wall of the gas lift cylinder 11, as long as hollow spaces are provided at the bearings at the upper and lower ends of the rotating shaft to allow the rising flue gas to pass through freely, if the flow rate of the rising flue gas is small, enough lift force is not provided to drive the mixing blades, and a driving device can be connected to the lower end of the rotating shaft to drive the mixing blades 12 (not shown in the figure). By arranging the mixing blades 12 in the lift cylinder, SO entering the lift cylinder can be mixed3The absorbent, the denitration reducing agent and the flue gas are mixed more fully, and more favorable conditions are created for the subsequent flue gas entering the denitration catalyst bed layer.
As further shown in fig. 2 and 3, a seal plate 20 is provided in the flue 2 perpendicularly to the direction of rising of the flue gas, the seal plate 20 is fixed to the inner wall surface of the flue 2, and the lift cylinders 11 are arranged and fixed to the seal plate 20. Further, a sealing plate 20 may be provided at a corresponding position of the annular protrusion 111 of the inflator 11, and the thickness of the sealing plate 20 is adapted to the height of the annular protrusion 111. This ensures that the flue gas enters the gas lift cylinder 11 for sufficient mixing when the flue gas flows upstream to the mixing unit of the present embodiment, and the gas lift cylinder 11 is more firmly fixed to the sealing plate 20.
As further shown in FIG. 2, SO is provided on the outer side of the flue 23 Absorbent supply line 3, SO3The absorbent supply pipe 3 may be connected to the SO of each of the gas cylinders 11 through a plurality of first branch pipes 31, respectively3The absorbent inlets 112 are in communication. The other side outside the flue 2 is provided with a stripperThe denitration reducing agent supply pipe 4, the denitration reducing agent supply pipe 4 may be respectively communicated with the denitration reducing agent inlet 113 of each of the gas cylinders 11 through a plurality of second branch pipes 41.
The mixing unit of the embodiment can arrange the denitration reducing agent and SO at the lower edge of the bulge part through the annular bulge part arranged on the gas lift cylinder3The inlet of the absorbent not only saves space, but also can strengthen denitration reducing agent and SO3The mixing effect of the absorbent and the flue gas; by arranging the mixing blades in the flue gas ascending channel of the gas ascending cylinder, the denitration reducing agent and SO can be further enhanced3The mixing effect of the absorbent and the flue gas; the mixing unit of this embodiment is easily retrofitted in the limited space of an existing boiler flue.
Example 2
The denitration system of the embodiment includes the mixing unit 1 of embodiment 1, and the mixing unit 1 is used for denitration reducing agent and SO in the flue of the denitration system3The absorbent and the flue gas are mixed. The denitration system further comprises a denitration catalyst bed layer 5, wherein the denitration catalyst bed layer 5 is arranged at the downstream position of the flue gas of the mixing unit and is used for receiving the flue gas mixed by the mixing unit and a denitration reducing agent. The denitration catalyst bed layer 5 is arranged at the downstream position of the flue gas of the mixing unit, and the SO at the front end of the mixing unit can be fully utilized3The absorption is carried out, and the corrosion influence on subsequent equipment is effectively reduced.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (10)
1. A mixing unit is characterized in that the mixing unit is used for mixing denitration reducing agent and SO in a flue of a denitration system3The absorbent and the smoke are mixed, and the method comprises the following steps:
the gas lift cylinders are uniformly arranged in the flue at intervals and are used for the denitration reducing agent and the SO3The absorbent and the flue gas provide a mixing space;
a mixing blade provided in the flue gas rising passage of the gas lift cylinder, the mixing blade rotating around an axis by the lift force of the flue gas to mix the denitration reducing agent and the SO3The absorbent and the flue gas are mixed in the flue gas uptake channel.
2. The mixing unit of claim 1, wherein the middle lower portion of the inflator is provided with an annular protrusion, and the lower edge of the annular protrusion is provided with the denitration reducing agent inlet and the SO3An absorbent inlet, the denitration reductant inlet and SO3The absorbent inlet is in communication with the flue gas uptake channel.
3. The mixing unit of claim 2, wherein the denitration reductant inlet and SO3The absorbent inlets are symmetrically arranged with respect to the central axis of the flue gas uptake channel.
4. The mixing unit of claim 1, wherein the mixing blades are in multiple sets and extend helically in the axial direction of the flue gas uptake channel.
5. The mixing unit according to claim 4, wherein the number of the mixing blades in each group is two, the mixing blades in each group are connected end to end, and the mixing blades connected into a whole are in a spiral rising shape.
6. The mixing unit according to claim 2, wherein a sealing plate is provided in the flue perpendicular to the rising direction of the flue gas, the sealing plate is fixed to an inner wall surface of the flue, and the gas rising cylinder is arranged and fixed to the sealing plate.
7. Mixing unit according to claim 6, wherein the sealing plates are arranged at respective positions of the annular protrusion, the thickness of the sealing plates being adapted to the height of the annular protrusion.
8. Mixing unit according to claim 2, characterized in that the flue is provided with SO on the outside thereof3An absorbent supply line, the SO3An absorbent supply line is connected to the SO in each row of the gas lift cylinders through a plurality of first branch pipes3The absorbent inlets are communicated.
9. The mixing unit of claim 8, wherein a denitration reducing agent supply pipe is provided at the other side of the flue, and the denitration reducing agent supply pipe is respectively communicated with the denitration reducing agent inlet of each row of the lift cylinders through a plurality of second branch pipes.
10. A denitration system comprising the mixing unit according to any one of claims 1 to 9, for mixing a denitration reducing agent, SO, in a flue of a denitration system3Mixing the absorbent and the flue gas; the denitration system further comprises:
and the denitration catalyst bed layer is arranged at the downstream position of the flue gas of the mixing unit and is used for receiving the flue gas mixed by the mixing unit and the denitration reducing agent.
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| CN202121540586.2U CN215388737U (en) | 2021-07-07 | 2021-07-07 | Mixing unit and denitration system using same |
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| CN202121540586.2U CN215388737U (en) | 2021-07-07 | 2021-07-07 | Mixing unit and denitration system using same |
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Effective date of registration: 20240328 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Country or region after: China Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Country or region before: China Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |
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