CN115006986A - Ammonia supply system for flue gas treatment - Google Patents
Ammonia supply system for flue gas treatment Download PDFInfo
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- CN115006986A CN115006986A CN202210678882.1A CN202210678882A CN115006986A CN 115006986 A CN115006986 A CN 115006986A CN 202210678882 A CN202210678882 A CN 202210678882A CN 115006986 A CN115006986 A CN 115006986A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 270
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000003546 flue gas Substances 0.000 title claims abstract description 93
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 73
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 36
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 44
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 5
- 238000005067 remediation Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- 239000000779 smoke Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/102—Ammonia
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an ammonia supply system for flue gas treatment, wherein the ammonia supply system for flue gas treatment comprises: the ammonia gas regulating device is used for controlling the output of ammonia gas, and the inlet end of the ammonia gas regulating device is used for being connected with an ammonia gas source; the ammonia gas spray gun is used for outputting ammonia gas, and the inlet end of the ammonia gas spray gun is connected with the outlet end of the ammonia gas regulating device; the conveying pipeline is used for conveying flue gas, one end of the conveying pipeline is used for being connected with a flue gas source, and the outlet end of the ammonia gas spray gun is arranged in the conveying pipeline; and the ammonia mixing device is used for mixing the flue gas and ammonia gas, the inlet end of the ammonia mixing device is connected with the outlet end of the conveying pipeline, and the outlet end of the ammonia mixing device is used for being connected with the denitration reactor. The technical scheme of the invention can improve the ammonia supply efficiency and simultaneously ensure the safety in the ammonia supply process.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to an ammonia supply system for flue gas treatment.
Background
With the development of society, the environmental protection requirement is higher and higher, and nitrogen oxide (NOx) is one of the main pollution sources causing air pollution, and the emission concentration of nitrogen oxide needs to be strictly controlled, so that in the flue gas treatment process, the flue gas needs to be denitrated to reduce the concentration of nitrogen oxide in the flue gas.
At present, ammonia gas is generally adopted as a reducing agent for Selective Catalytic Reduction (SCR) in a denitration reaction process for flue gas treatment. The mixing of ammonia and flue gas directly determines the reaction effect, and currently, ammonia mixing dilution air is generally adopted to mix with the flue gas so as to ensure the safety of ammonia supply and uniformly mix the ammonia; however, in the process of mixing and diluting the air with the ammonia gas, on one hand, certain time needs to be consumed, so that the ammonia supply efficiency is reduced, and therefore the efficiency of flue gas treatment is reduced, on the other hand, the ammonia supply system can be mixed with partial air, the tightness of the whole flue gas treatment system is weakened, and the high-efficiency operation of the flue gas treatment system is not facilitated.
Disclosure of Invention
The invention mainly aims to provide an ammonia supply system for flue gas treatment, which aims to improve the ammonia supply efficiency and ensure the safety in the ammonia supply process.
In order to achieve the above object, the present invention provides an ammonia supply system for flue gas treatment, comprising:
the ammonia gas regulating device is used for controlling the output of ammonia gas, and the inlet end of the ammonia gas regulating device is used for being connected with an ammonia gas source;
the ammonia gas spray gun is used for outputting ammonia gas, and the inlet end of the ammonia gas spray gun is connected with the outlet end of the ammonia gas regulating device;
the conveying pipeline is used for conveying flue gas, one end of the conveying pipeline is used for being connected with a flue gas source, and the outlet end of the ammonia gas spray gun is arranged in the conveying pipeline;
and the ammonia mixing device is used for mixing the flue gas and ammonia gas, the inlet end of the ammonia mixing device is connected with the outlet end of the conveying pipeline, and the outlet end of the ammonia mixing device is used for being connected with the denitration reactor.
Optionally, the ammonia mixing device includes mixing duct, first water conservancy diversion spare and second water conservancy diversion spare, mixing duct's one end with the transportation pipeline is connected, mixing duct's the other end is used for connecting denitration reactor, first water conservancy diversion spare with the second water conservancy diversion spare sets gradually in mixing duct along the flow direction of flue gas.
Optionally, the first flow guiding element includes a first cross beam, a first vertical column, a first flow guiding plate and a second flow guiding plate, the first cross beam and the first vertical column are sequentially disposed in the mixing pipe along the flow direction of the flue gas, the first cross beam is located in the middle of the first vertical column, the mixing pipe has a left portion and a right portion which are opposite to each other, the first flow guiding plate is disposed above the first cross beam, the first flow guiding plate is located at the right portion of the mixing pipe and guides the flue gas to flow to the left portion of the mixing pipe, the second flow guiding plate is disposed below the first cross beam, and the first flow guiding plate is located at the left portion of the mixing pipe and guides the flue gas to flow to the right portion of the mixing pipe; the second water conservancy diversion spare includes second crossbeam, second upstand, third guide plate and fourth guide plate, the second crossbeam with the second upstand along the flow direction of flue gas set gradually in the hybrid tube, the second crossbeam is located the middle part of second upstand, the third guide plate set up in the top of second crossbeam, just the third guide plate is located hybrid tube's left part, the guide flue gas toward hybrid tube's right part flows, the fourth guide plate set up in the below of second crossbeam, just the fourth guide plate is located hybrid tube's right part, the guide flue gas toward hybrid tube's left part flows.
Optionally, the first flow guide piece further comprises a first connecting plate, the first connecting plate is respectively connected with the first cross beam and the first vertical column, the first flow guide plate is arranged above the first connecting plate, and the second flow guide plate is arranged below the first connecting plate; the second guide piece further comprises a second connecting plate, the second connecting plate is connected with the second cross beam and the second vertical column respectively, the third guide plate is arranged above the second connecting plate, and the fourth guide plate is arranged below the second connecting plate.
Optionally, the ammonia gas adjusting device includes a cut-off valve, a first cut-off valve, a switch valve, a flow meter, a regulating valve and a check valve, wherein an inlet end of the cut-off valve is connected to the ammonia gas source, an outlet end of the cut-off valve is connected to an inlet end of the first cut-off valve, an outlet end of the first cut-off valve is connected to an inlet end of the switch valve, an outlet end of the switch valve is connected to an inlet end of the flow meter, an outlet end of the flow meter is connected to an inlet end of the regulating valve, an outlet end of the regulating valve is connected to an inlet end of the check valve, and an outlet end of the check valve is connected to an inlet end of the ammonia gas spray gun.
Optionally, the ammonia gas regulating device further comprises a maintenance pipeline, one end of the maintenance pipeline is connected with the outlet end of the cut-off valve, and the other end of the maintenance pipeline is connected with the inlet end of the check valve; the overhaul pipeline is connected with a second stop valve.
Optionally, the ammonia gas adjusting device further comprises a pressure gauge valve, and the pressure gauge valve is arranged at the inlet end of the check valve.
Optionally, the ammonia gas regulating device further comprises a purge valve disposed at an inlet end of the check valve;
and/or the ammonia gas regulating device also comprises a third stop valve, wherein the inlet end of the third stop valve is connected with the outlet end of the regulating valve, and the outlet end of the third stop valve is connected with the inlet end of the check valve.
Optionally, the outlet end of the ammonia gas spray gun is connected with a gas injection pipe, and the peripheral wall of the gas injection pipe is provided with at least one nozzle.
Optionally, the gas lance comprises opposing left, top and right sides; the left side part is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe; the top is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe; the right side part is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe.
The technical scheme of the invention is that the ammonia gas output quantity of an ammonia gas spray gun is controlled by an ammonia gas adjusting device, the outlet end of the ammonia gas spray gun is arranged in a conveying pipeline, namely the ammonia gas spray gun can spray ammonia gas into the conveying pipeline, one end of the conveying pipeline is connected with a smoke gas source, smoke gas can enter the conveying pipeline, the smoke gas and the ammonia gas flow in the conveying pipeline, the inlet end of an ammonia gas mixing device is connected with one end of the conveying pipeline, which is far away from the smoke gas source, namely the ammonia gas and the smoke gas can be conveyed to the ammonia gas mixing device along the conveying pipeline, the ammonia gas mixing device can mix the smoke gas and the ammonia gas, the outlet end of the ammonia gas mixing device is connected with a denitration reactor, the mixed smoke gas and the ammonia gas can be conveyed to the denitration reactor for denitration reaction, so as to reduce the concentration of nitrogen oxides in the smoke gas, and the ammonia gas is directly controlled by the ammonia gas adjusting device without mixing and diluting air, and ammonia and flue gas can mix through ammonia mixing arrangement to improve and supply ammonia efficiency, in addition, because the ammonia adjusting device can control the transport of ammonia, consequently can ensure to supply the security of ammonia in-process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of an ammonia supply system for flue gas remediation according to the present invention.
Fig. 2 is a schematic structural diagram of an ammonia gas regulating device of an embodiment of an ammonia supply system for flue gas treatment according to the present invention.
Fig. 3 is a schematic structural view of an ammonia gas spray gun of an embodiment of the ammonia supply system for flue gas treatment of the present invention.
FIG. 4 is a side view of an ammonia gas injection lance of an embodiment of the ammonia supply system for flue gas remediation of the present invention.
Fig. 5 is a schematic gas injection diagram of an ammonia gas injection gun of an embodiment of the ammonia supply system for flue gas treatment according to the invention.
Fig. 6 is a schematic structural diagram of an ammonia mixing device of an ammonia supply system for flue gas treatment according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an ammonia supply system for flue gas treatment.
In an embodiment of the present invention, referring to fig. 1, the ammonia supply system for flue gas treatment includes:
the ammonia gas regulating device 10 is used for controlling the output of ammonia gas, and the inlet end of the ammonia gas regulating device 10 is used for being connected with an ammonia gas source 1;
the ammonia gas spray gun 20 is used for outputting ammonia gas, and the inlet end of the ammonia gas spray gun 20 is connected with the outlet end of the ammonia gas regulating device 10;
the conveying pipeline 30 is used for conveying flue gas, one end of the conveying pipeline 30 is used for being connected with the flue gas source 2, and the outlet end of the ammonia spray gun 20 is arranged in the conveying pipeline 30;
the ammonia mixing device 40 is used for mixing the flue gas and the ammonia, the inlet end of the ammonia mixing device 40 is connected with the outlet end of the conveying pipeline 30, and the outlet end of the ammonia mixing device 40 is used for being connected with the denitration reactor 80;
the technical scheme of the invention is that the ammonia gas output quantity of an ammonia gas spray gun 20 is controlled by an ammonia gas adjusting device 10, the outlet end of the ammonia gas spray gun 20 is arranged in a conveying pipeline 30, namely the ammonia gas spray gun 20 can spray ammonia gas into the conveying pipeline 30, one end of the conveying pipeline 30 is connected with a smoke gas source 2, smoke gas can enter the conveying pipeline 30, the smoke gas and the ammonia gas flow in the conveying pipeline 30, the inlet end of an ammonia gas mixing device 40 is connected with one end of the conveying pipeline 30, which is far away from the smoke gas source 2, namely the ammonia gas and the smoke gas can be conveyed to the ammonia gas mixing device 40 along the conveying pipeline 30, the ammonia gas mixing device 40 can mix the smoke gas and the ammonia gas, the outlet end of the ammonia gas mixing device 40 is connected with a denitration reactor 80, the smoke gas and the ammonia gas can be conveyed to the denitration reactor 80 for denitration reaction after being mixed, so as to reduce the concentration of nitrogen oxides in the smoke gas, and no ammonia gas needs to be mixed and diluted air, adopt ammonia adjusting device 10 direct control ammonia spray gun 20 to directly send the ammonia, and ammonia and flue gas can mix through ammonia mixing arrangement 40 to improve and supply ammonia efficiency, in addition, because ammonia adjusting device 10 can control the transport of ammonia, consequently can ensure to supply the security of ammonia in-process.
Specifically, referring to fig. 6, the ammonia gas mixing device 40 includes a mixing pipeline 401, a first flow guide member 50 and a second flow guide member 60, one end of the mixing pipeline 401 is connected to the transport pipeline 30, the other end of the mixing pipeline 401 is used for connecting the denitration reactor, the first flow guide member 50 and the second flow guide member 60 are sequentially disposed in the mixing pipeline 401 along the flow direction of the flue gas, and after entering the mixing pipeline 401, the ammonia gas and the flue gas are sequentially guided and divided by the first flow guide member 50 and the second flow guide member 60, so that dual flow guide mixing is realized, the ammonia gas and the flue gas are ensured to be fully mixed, and the flue gas denitration reaction is conveniently performed subsequently;
the first flow guide piece 50 comprises a first cross beam 501, a first vertical column 502, a first flow guide plate 504 and a second flow guide plate 505, the first cross beam 501 and the first vertical column 502 are sequentially arranged in the mixing pipeline along the flow direction of the flue gas, the first cross beam 501 is positioned in the middle of the first vertical column 502, the mixing pipeline is provided with a left part and a right part which are opposite, the first flow guide plate 504 is arranged above the first cross beam 501, the first flow guide plate 504 is positioned at the right part of the mixing pipeline and used for guiding the flue gas to flow towards the left part of the mixing pipeline, the second flow guide plate 505 is arranged below the first cross beam 501, the first flow guide plate 504 is positioned at the left part of the mixing pipeline and used for guiding the flue gas to flow towards the right part of the mixing pipeline; the second flow guiding element 60 comprises a second beam 601, a second vertical column 602, a third flow guiding plate 604 and a fourth flow guiding plate 605, the second beam 601 and the second vertical column 602 are sequentially arranged in the mixing pipeline along the flow direction of the flue gas, the second beam 601 is positioned in the middle of the second vertical column 602, the third flow guiding plate 604 is arranged above the second beam 601, and the third guide plate 604 is located at the left part of the mixing duct to guide the flue gas to flow to the right part of the mixing duct, the fourth guide plate 605 is arranged below the second beam 601, the fourth guide plate 605 is located at the right part of the mixing duct to guide the flue gas to flow to the left part of the mixing duct, the first guide plate 504, the second guide plate 505, the third guide plate 604 and the fourth guide plate 605 are all in shapes with a flow guiding function, such as an inclined shape or an arc shape, thereby realizing the flow guiding effect, the first beam 501 and the second beam 601 are positioned on the same horizontal plane;
after the flue gas mixed with ammonia gas enters the mixing pipeline 401, the flue gas firstly passes through the first flow guide piece 50, the flue gas above the first beam 501 is guided by the first flow guide plate 504 and flows to the left part of the mixing pipeline 401, the flue gas below the first beam 501 is guided by the second flow guide plate 505 and flows to the right part of the mixing pipeline 401, and a part of the flue gas which is not guided by the first flow guide plate 504 and the second flow guide plate 505 and flows along the length direction of the mixing pipeline 401 is added, so that three air flows in different flowing directions can be formed, the three air flows in different flowing directions can be intersected in the flowing process, and the mixing of the ammonia gas and the flue gas is enhanced; when the flue gas passes through the second flow guiding element 60, the flue gas above the first beam 501 is guided by the third flow guiding plate 604 above the second beam 601 to flow to the right part of the mixing pipe 401, that is, the flow direction of the flue gas above the first beam 501 changes from flowing to the left part of the mixing pipe 401 to flowing to the right part of the mixing pipe 401, and the change of the flue gas flow direction can enhance the mixing effect of ammonia gas and flue gas, that is, the mixing sufficiency of the flue gas above the first beam 501 and ammonia gas is further enhanced, the flue gas below the first beam 501 is guided by the fourth flow guiding plate 605 below the second beam 601 to flow to the left part of the mixing pipe 401, that is, the flow direction of the flue gas below the first beam 501 changes from flowing to the right part of the mixing pipe 401 to flowing to the left part of the mixing pipe 401, and the change of the flue gas flow direction can enhance the mixing effect of ammonia gas and flue gas, that is, that the mixing sufficiency of the flue gas below the first beam 501 and ammonia gas is further enhanced, therefore, under the combined action of the first flow guide part 50 and the second flow guide part 60, the ammonia gas and the flue gas can be fully mixed, so that the subsequent flue gas denitration effect is improved, the ammonia gas escape rate is reduced, and the ammonia gas consumption is saved;
in addition, the first flow guiding element 50 further includes a first connecting plate 503, the first connecting plate 503 is respectively connected with the first beam 501 and the first vertical column 502, the first flow guiding plate 504 is disposed above the first connecting plate 503, and the second flow guiding plate 505 is disposed below the first connecting plate 503, on one hand, the first connecting plate 503 can support and reinforce the first flow guiding plate 504 and the second flow guiding plate 505, so as to improve the structural stability of the first flow guiding element 50, and on the other hand, the first connecting plate 503 can be set into a corresponding shape according to the actual flow guiding requirement, so as to improve the flow guiding effect of the first flow guiding element 50; the second guide member 60 further comprises a second connecting plate 603, the second connecting plate 603 is connected with the second beam 601 and the second vertical column 602 respectively, the third guide plate 604 is arranged above the second connecting plate 603, and the fourth guide plate 605 is arranged below the second connecting plate 603, on one hand, the second connecting plate 603 can support and reinforce the third guide plate 604 and the fourth guide plate 605, so as to improve the structural stability of the second guide member 60, on the other hand, the second connecting plate 603 can be arranged in a corresponding shape according to actual guide requirements, so as to improve the guide effect of the second guide member 60.
Specifically, referring to fig. 2, the ammonia gas regulating device 10 includes a cut-off valve 101, a first cut-off valve 102, a switch valve 103, a flow meter 104, a regulating valve 105 and a check valve 106, wherein an inlet end of the cut-off valve 101 is connected to the ammonia gas source 1, an outlet end of the cut-off valve 101 is connected to an inlet end of the first cut-off valve 102, when a safety problem occurs, the output of the ammonia gas source 1 can be cut off in time to ensure the safety of the ammonia gas supply process, an outlet end of the first cut-off valve 102 is connected to an inlet end of the switch valve 103, an outlet end of the switch valve 103 is connected to an inlet end of the flow meter 104, an outlet end of the flow meter 104 is connected to an inlet end of the regulating valve 105, an outlet end of the regulating valve 105 is connected to an inlet end of the check valve 106, an outlet end of the check valve 106 is connected to an inlet end of the ammonia gas spray gun 20, the first cut-off valve 102 can block the ammonia gas which has just entered into the pipeline, and the switch valve 103 can control the entry and exit of the ammonia gas, the ooff valve 103 is pneumatic ooff valve 103, and the input of ammonia can be makeed statistics of to flowmeter 104, and governing valve 105 is pneumatic governing valve 105, can adjust the flow of ammonia in the pipeline, and check valve 106 sets up in the entrance point of ammonia spray gun 20, can prevent that the ammonia from flowing back to the pipeline in ammonia spray gun 20, synthesizes the effect of a plurality of different valve bodies, improves the security stability that further improves the confession ammonia in-process.
Wherein, the ammonia gas regulating device 10 further comprises an overhaul pipeline 70, one end of the overhaul pipeline 70 is connected with the outlet end of the shut-off valve 101, and the other end is connected with the inlet end of the check valve 106; the maintenance pipeline 70 is connected with a second stop valve 701, when the ammonia gas adjusting device 10 breaks down, the ammonia gas adjusting device can be checked and repaired through the maintenance pipeline 70, and the influence on the main pipeline is avoided.
In addition, the ammonia gas regulating device 10 further comprises a pressure gauge valve 107, the pressure gauge valve 107 is arranged at the inlet end of the check valve 106, the pressure of the pipeline can be observed in real time through the pressure gauge valve 107, the pressure of the pipeline can be adjusted according to requirements, and safety accidents caused by overlarge or undersize pipeline pressure are prevented; the ammonia gas regulating device 10 further comprises a purge valve 108, the purge valve 108 is arranged at the inlet end of the check valve 106, and the purge valve 108 can remove impurities in the pipeline to prevent the pipeline from being blocked; the ammonia gas regulating device 10 further comprises a third stop valve 109, the inlet end of the third stop valve 109 is connected with the outlet end of the regulating valve 105, the outlet end of the third stop valve 109 is connected with the inlet end of the check valve 106, and because the inlet end of the third stop valve 109 is connected with the outlet end of the regulating valve 105, the inlet position and the outlet position of the pipeline can be respectively controlled under the combined action of the third stop valve 109 and the first stop valve 102, so that the structural stability of the ammonia gas regulating device 10 is enhanced.
Specifically, referring to fig. 3, the outlet end of the ammonia gas spray gun 20 is connected with a gas spray pipe 201, the outer peripheral wall of the gas spray pipe 201 is provided with at least one nozzle 202, ammonia gas can flow out from the outlet end of the ammonia gas spray gun 20, enter the gas spray pipe 201, and then is sprayed out from the nozzles 202 on the gas spray pipe 201, and a corresponding number of nozzles 202 are arranged on the outer peripheral wall of the gas spray pipe 201 according to actual requirements, so as to meet the demand of ammonia gas flow and accelerate the mixing rate of ammonia gas and flue gas;
referring to fig. 3 and 4, the gas lance 201 includes a left side portion, a top portion and a right side portion; the left side part is provided with a plurality of nozzles 202, and the plurality of nozzles 202 are arranged at intervals along the length direction of the gas lance 201; the top of the gas injection pipe 201 is provided with a plurality of nozzles 202, and the plurality of nozzles 202 are arranged at intervals along the length direction of the gas injection pipe 201; the right side part is provided with a plurality of nozzles 202, the plurality of nozzles 202 are arranged at intervals along the length direction of the gas injection pipe 201, please refer to fig. 5, ammonia gas can be simultaneously sprayed out from the nozzles 202 on the left side part, the top part and the right side part of the gas injection pipe 201, so that the gas injection range covers the side circumference position of the gas injection pipe 201, the gas injection uniformity of the ammonia gas spray gun 20 is improved, and the gas injection dead angle is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An ammonia supply system for flue gas remediation, comprising:
the ammonia gas regulating device is used for controlling the output of ammonia gas, and the inlet end of the ammonia gas regulating device is used for being connected with an ammonia gas source;
the ammonia gas spray gun is used for outputting ammonia gas, and the inlet end of the ammonia gas spray gun is connected with the outlet end of the ammonia gas regulating device;
the conveying pipeline is used for conveying flue gas, one end of the conveying pipeline is used for being connected with a flue gas source, and the outlet end of the ammonia gas spray gun is arranged in the conveying pipeline;
and the ammonia mixing device is used for mixing the flue gas and ammonia, the inlet end of the ammonia mixing device is connected with the outlet end of the conveying pipeline, and the outlet end of the ammonia mixing device is used for being connected with the denitration reactor.
2. The ammonia supply system for flue gas treatment according to claim 1, wherein the ammonia gas mixing device comprises a mixing pipeline, a first flow guide member and a second flow guide member, one end of the mixing pipeline is connected with the conveying pipeline, the other end of the mixing pipeline is used for connecting the denitration reactor, and the first flow guide member and the second flow guide member are sequentially arranged in the mixing pipeline along the flow direction of flue gas.
3. The ammonia supply system for flue gas treatment according to claim 2, wherein the first flow guiding element comprises a first cross beam, a first vertical column, a first flow guiding plate and a second flow guiding plate, the first cross beam and the first vertical column are sequentially arranged in the mixing pipe along the flow direction of flue gas, the first cross beam is arranged in the middle of the first vertical column, the mixing pipe has a left part and a right part which are opposite, the first flow guiding plate is arranged above the first cross beam, the first flow guiding plate is arranged at the right part of the mixing pipe and guides flue gas to flow to the left part of the mixing pipe, the second flow guiding plate is arranged below the first cross beam, and the first flow guiding plate is arranged at the left part of the mixing pipe and guides flue gas to flow to the right part of the mixing pipe; the second water conservancy diversion spare includes second crossbeam, second upstand, third guide plate and fourth guide plate, the second crossbeam with the second upstand along the flow direction of flue gas set gradually in the hybrid tube, the second crossbeam is located the middle part of second upstand, the third guide plate set up in the top of second crossbeam, just the third guide plate is located the left part of hybrid tube, the guide flue gas is past the right part of hybrid tube flows, the fourth guide plate set up in the below of second crossbeam, just the fourth guide plate is located the right part of hybrid tube, the guide flue gas is past the left part of hybrid tube flows.
4. The ammonia supply system for flue gas treatment according to claim 3, wherein the first diversion member further comprises a first connection plate, the first connection plate is respectively connected with the first cross beam and the first vertical column, the first diversion plate is arranged above the first connection plate, and the second diversion plate is arranged below the first connection plate; the second guide piece further comprises a second connecting plate, the second connecting plate is connected with the second cross beam and the second vertical column respectively, the third guide plate is arranged above the second connecting plate, and the fourth guide plate is arranged below the second connecting plate.
5. The ammonia supply system for flue gas treatment according to claim 1, wherein the ammonia gas regulating device comprises a shut-off valve, a first shut-off valve, a switch valve, a flow meter, a regulating valve and a check valve, wherein an inlet end of the shut-off valve is connected with the ammonia gas source, an outlet end of the shut-off valve is connected with an inlet end of the first shut-off valve, an outlet end of the first shut-off valve is connected with an inlet end of the switch valve, an outlet end of the switch valve is connected with an inlet end of the flow meter, an outlet end of the flow meter is connected with an inlet end of the regulating valve, an outlet end of the regulating valve is connected with an inlet end of the check valve, and an outlet end of the check valve is connected with an inlet end of the ammonia gas spray gun.
6. The ammonia supply system for flue gas treatment according to claim 5, wherein the ammonia gas regulating device further comprises a maintenance pipeline, one end of the maintenance pipeline is connected with the outlet end of the cut-off valve, and the other end of the maintenance pipeline is connected with the inlet end of the check valve; the overhaul pipeline is connected with a second stop valve.
7. The ammonia supply system for flue gas treatment according to claim 5, wherein the ammonia gas regulating device further comprises a pressure gauge valve, and the pressure gauge valve is arranged at the inlet end of the check valve.
8. The ammonia supply system for flue gas remediation of claim 5 wherein the ammonia gas conditioning unit further comprises a purge valve disposed at the inlet end of the check valve;
and/or the ammonia gas regulating device also comprises a third stop valve, wherein the inlet end of the third stop valve is connected with the outlet end of the regulating valve, and the outlet end of the third stop valve is connected with the inlet end of the check valve.
9. The ammonia supply system for flue gas treatment according to claim 1, wherein the outlet end of the ammonia gas lance is connected with a gas injection pipe, and the peripheral wall of the gas injection pipe is provided with at least one nozzle.
10. The ammonia supply system for flue gas remediation of claim 9 wherein the gas lance includes opposing left, top and right sides; the left side part is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe; the top is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe; the right side part is provided with a plurality of nozzles which are arranged at intervals along the length direction of the gas ejector pipe.
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| CN202210678882.1A CN115006986A (en) | 2022-06-15 | 2022-06-15 | Ammonia supply system for flue gas treatment |
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| CN202210678882.1A CN115006986A (en) | 2022-06-15 | 2022-06-15 | Ammonia supply system for flue gas treatment |
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| CN214261323U (en) * | 2020-11-30 | 2021-09-24 | 北京中航泰达环保科技股份有限公司 | Ridge type static mixer and flue gas treatment system |
| CN216418939U (en) * | 2021-11-05 | 2022-05-03 | 同兴环保科技股份有限公司 | Energy-saving ammonia distillation system |
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- 2022-06-15 CN CN202210678882.1A patent/CN115006986A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08103628A (en) * | 1994-10-06 | 1996-04-23 | Ishikawajima Harima Heavy Ind Co Ltd | Ammonia injector of denitrator |
| US20150064083A1 (en) * | 2013-08-28 | 2015-03-05 | Alstom Technology Ltd | Injector grid for high and low dust environment selective catalytic reduction systems |
| CN107008147A (en) * | 2017-06-09 | 2017-08-04 | 南京电力设备质量性能检验中心 | A kind of ammonia-gas spraying device for SCR denitration system |
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