CN113144858A - Ammonia spraying pipeline and denitration ammonia spraying device - Google Patents
Ammonia spraying pipeline and denitration ammonia spraying device Download PDFInfo
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- CN113144858A CN113144858A CN202110298567.1A CN202110298567A CN113144858A CN 113144858 A CN113144858 A CN 113144858A CN 202110298567 A CN202110298567 A CN 202110298567A CN 113144858 A CN113144858 A CN 113144858A
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- ammonia
- ammonia injection
- flue gas
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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
- B01D53/76—Gas phase processes, e.g. by using aerosols
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention relates to the technical field of denitration ammonia injection devices, in particular to an ammonia injection pipeline and a denitration ammonia injection device. The ammonia injection pipeline comprises: an ammonia injection pipeline body; the nozzle is arranged on the ammonia spraying pipeline body and communicated with the inside of the ammonia spraying pipeline body; the protection angle steel is arranged on the outer surface of the ammonia spraying pipeline body, is arranged at the position close to the wind end of the flue gas flowing direction S2 relative to the nozzle and is suitable for at least partially covering the nozzle; the section of the ammonia spraying pipeline body, which is vertical to the ammonia gas conveying direction S1, is constructed into a shuttle-shaped structure; and the size of the maximum width of the ammonia spraying pipe body perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width of the ammonia spraying pipe body parallel to the flue gas flowing direction S2. The ammonia spraying pipeline provided by the invention can reduce the wind shielding area of the ammonia spraying pipeline, reduce the resistance of the system, improve the efficiency of the system and realize accurate energy conservation.
Description
Technical Field
The invention relates to the technical field of denitration ammonia injection devices, in particular to an ammonia injection pipeline and a denitration ammonia injection device.
Background
The flue gas of a thermal power plant contains a large amount of nitrogen oxides, if the flue gas is not treated, the waste gas is discharged into the atmosphere to cause pollution and form acid rain, and in order to reduce the emission of the nitrogen oxides, the flue gas after combustion needs to be subjected to denitration treatment. Among the prior art, thermal power factory often need use flue gas denitrification facility, installs many devices that spout ammonia in the vertical section of denitration reactor for the injection of ammonia adopts the ammonia as the reductant, and nitrogen oxide is deviate from in the reaction of ammonia in the reactor. The existing ammonia spraying device is made of a round steel pipe, holes are formed in the round pipe, and nozzles at different angles are welded in a cross mode to achieve ammonia spraying coverage. However, the pipelines for spraying ammonia are arranged in parallel in the flue side by side, the projected area of the pipelines almost occupies 20% of the cross-sectional area of the whole flue, the effective cross section through which the flue gas can pass is reduced, and the resistance and the energy consumption of the system are greatly increased.
In addition, in order to prevent the nozzles from being blocked, a steel plate for protecting the nozzles is generally welded on the windward side of the pipeline, the steel plate is wider at the upper parts of the nozzles, and the steel plate is narrower between the two nozzles, but the larger steel plate is arranged, so that the system resistance is greatly increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the projection area of the ammonia injection pipeline occupies a larger proportion of the cross-sectional area of the flue in the prior art, so that the ammonia injection pipeline which reduces the proportion of the projection area of the pipeline in the flue is provided under the condition of ensuring that the ammonia injection flow is not changed.
The invention aims to solve another technical problem and overcome the defect that the projection area of an ammonia spraying pipeline occupies a larger proportion of the cross-sectional area of a flue in the prior art, thereby providing the denitration ammonia spraying device which reduces the proportion of the projection area of the pipeline in the flue under the condition of ensuring that the ammonia spraying flow is not changed.
In order to solve the above technical problem, the present invention provides an ammonia injection pipeline, comprising:
an ammonia injection pipeline body;
the nozzle is arranged on the ammonia spraying pipeline body and communicated with the inside of the ammonia spraying pipeline body; and
the protection angle steel is arranged on the outer surface of the ammonia injection pipeline body, is arranged at the position close to the wind end of the flue gas flowing direction S2 relative to the nozzle and is suitable for at least partially covering the nozzle;
the section of the ammonia spraying pipeline body, which is vertical to the ammonia gas conveying direction S1, is constructed into a shuttle-shaped structure; and the size of the maximum width of the ammonia spraying pipe body perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width of the ammonia spraying pipe body parallel to the flue gas flowing direction S2.
Optionally, the near-wind end of the ammonia spraying pipeline body flowing along the flue gas direction S2 forms a windward surface with a sharp angle, and a leeward surface with the same sharp angle is formed at the far-wind end; the windward side and the leeward side are in smooth transition.
Optionally, the windward side is formed by an arc protruding towards the outer side of the ammonia spraying pipeline body.
Optionally, a ratio of a size of the maximum width of the ammonia injection pipeline body parallel to the flue gas flowing direction S2 to a size of the maximum width of the ammonia injection pipeline body perpendicular to the flue gas flowing direction S2 ranges from 1 to 30.
Optionally, the nozzle is arranged at a far wind end position on the ammonia spraying pipeline body along the flue gas flowing direction S2.
Optionally, along the ammonia gas conveying direction S1, the ammonia spraying pipe body is provided with a plurality of nozzles.
Optionally, the plurality of nozzles are alternately arranged along the ammonia gas conveying direction S1 on two opposite sides of the ammonia injection pipeline body along the direction perpendicular to the flue gas flow direction S2.
Optionally, the first end of the nozzle is connected to the ammonia injection pipe body, and the second end of the nozzle extends away from the ammonia injection pipe body; and the projection of the nozzle is positioned at the outer side of the ammonia spraying pipeline body along the direction parallel to the smoke flowing direction S2.
Optionally, along a direction parallel to the flue gas flow direction S2, the projection of the protection angle steel is located outside the ammonia injection pipeline body.
Optionally, along a direction parallel to the ammonia gas conveying direction S1, the projection size of the protection angle steel is greater than or equal to the projection size of the ammonia injection pipeline body.
Optionally, the angle between the nozzle and the flue gas flowing direction S2 is alpha, wherein alpha is more than or equal to 15 degrees and less than or equal to 50 degrees.
The invention provides a denitration ammonia injection device, which comprises: according to the ammonia injection pipeline, the ammonia injection pipeline is arranged in the flue.
The technical scheme of the invention has the following advantages:
1. the ammonia spraying pipeline provided by the invention is characterized in that the section of the ammonia spraying pipeline body, which is perpendicular to the ammonia gas conveying direction S1, is constructed into a shuttle-shaped structure; the size of the maximum width part of the ammonia spraying pipeline body perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width part of the ammonia spraying pipeline body parallel to the flue gas flowing direction S2, so that the traditional circular cross section is replaced, the ammonia spraying flow of the system is unchanged under the condition that the cross sections are completely equal, and the effect of removing nitrogen oxides can be ensured; and the major axis of the fusiform pipeline is parallel to the flow velocity direction of the flue gas, and the minor axis of the fusiform pipeline is perpendicular to the flow velocity of the flue gas.
2. According to the ammonia injection pipeline provided by the invention, the protection angle steel is arranged at the position close to the wind end of the flue gas flowing direction S2 relative to the nozzle, and at least partially covers the nozzle, so that the system resistance is reduced and the energy-saving effect is improved by adopting the angle steel form; so that the denitration efficiency is improved and the using amount of ammonia water is saved.
3. According to the ammonia spraying pipeline provided by the invention, the ammonia spraying pipeline body forms a windward surface with a sharp angle along the near-wind end of the flue gas flowing direction S2, and the windward surface and the leeward surface are in smooth transition, so that the ammonia spraying pipeline body with a shuttle-shaped structure optimizes the flow field of the contact surface parallel to the flue gas flowing direction, reduces the abrasion degree of the windward surface, and reduces the system resistance.
4. According to the ammonia spraying pipeline provided by the invention, the ratio of the size of the maximum width position of the ammonia spraying pipeline body parallel to the flue gas flowing direction S2 to the size of the maximum width position of the ammonia spraying pipeline body perpendicular to the flue gas flowing direction S2 is reasonably selected, so that the wind shielding area of the ammonia spraying pipeline can be reasonably adjusted under the condition of ensuring that the ammonia spraying flow is not changed, the resistance of a system is reduced, the efficiency of the system is improved, and accurate energy conservation is realized.
5. According to the ammonia spraying pipeline provided by the invention, the nozzle is arranged at the far wind end position of the ammonia spraying pipeline body along the flue gas flowing direction S2, so that the nozzle is positioned at the far wind end position of the flue gas flowing direction S2, ammonia gas can be sprayed out in the same direction as the flue gas, the mixing effect of the flue gas and the ammonia gas is ensured, and the condition that the ammonia gas spraying effect is poor due to the direct blowing of the flue gas to the ammonia gas is avoided.
6. According to the ammonia spraying pipeline provided by the invention, the plurality of nozzles are arranged on the ammonia spraying pipeline body, so that the distribution number of the nozzles in the flue gas pipeline is increased, the contact area of ammonia gas and flue gas is increased, and the denitration effect is ensured.
7. According to the denitration ammonia injection device provided by the invention, the shuttle-shaped ammonia injection pipeline is adopted, and the size of the maximum width position of the ammonia injection pipeline body, which is vertical to the flue gas flowing direction S2, is smaller than the size of the maximum width position of the ammonia injection pipeline body, which is parallel to the flue gas flowing direction S2, so that the traditional circular section is replaced, the ammonia injection flow of the system is unchanged under the condition that the sectional areas are completely equal, and the effect of removing nitrogen oxides can be ensured; and the long side of the shuttle-shaped pipeline is parallel to the flow velocity direction of the flue gas, and the short side of the shuttle-shaped pipeline is perpendicular to the flow velocity of the flue gas.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of an ammonia injection line according to the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic view of the nozzle and the protection angle steel at the view angle B-B in fig. 1.
Description of reference numerals:
1-spraying ammonia pipeline body, 2-nozzle, 3-protection angle steel, alpha-nozzle angle; s1-direction of ammonia gas transport, S2-flue gas flow direction.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1 to fig. 3, the ammonia injection pipeline provided in this embodiment includes:
an ammonia injection pipeline body 1;
the nozzle 2 is arranged on the ammonia spraying pipeline body 1 and communicated with the inside of the ammonia spraying pipeline body 1; and
the protection angle steel 3 is arranged on the outer surface of the ammonia injection pipeline body 1, is arranged at the position of the near wind end of the flue gas flowing direction S2 relative to the nozzle 2, and is suitable for at least partially covering the nozzle 2;
the section of the ammonia spraying pipeline body 1, which is perpendicular to the ammonia gas conveying direction S1, is constructed into a shuttle-shaped structure; and the size of the maximum width of the ammonia spraying pipe body 1 perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width of the ammonia spraying pipe body 1 parallel to the flue gas flowing direction S2.
The ammonia injection pipeline provided by the embodiment is constructed in a shuttle-shaped structure by configuring the section of the ammonia injection pipeline body 1, which is perpendicular to the ammonia gas conveying direction S1; the size of the maximum width position of the ammonia spraying pipeline body 1 perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width position of the ammonia spraying pipeline body 1 parallel to the flue gas flowing direction S2, so that the traditional circular cross section is replaced, the ammonia spraying flow of the system is unchanged under the condition that the cross sections are completely equal, and the effect of removing nitrogen oxides can be ensured; and the major axis of the fusiform pipeline is parallel to the flow velocity direction of the flue gas, and the minor axis of the fusiform pipeline is perpendicular to the flow velocity of the flue gas.
According to the ammonia injection pipeline provided by the embodiment, the protection angle steel 3 is arranged at the position close to the wind end of the flue gas flowing direction S2 relative to the nozzle 2, and at least partially covers the nozzle 2, so that the system resistance is reduced and the energy-saving effect is improved by adopting an angle steel form; so that the denitration efficiency is improved and the using amount of ammonia water is saved.
Preferably, the protection angle steel 3 that this embodiment provided only sets up in the corresponding position of nozzle, and other places do not all set up, compare in traditional protection shield structure, realize blockking the reduction of area, had both guaranteed the denitrogenation efficiency of system, effectively reduced system resistance, increased the route and the area of mass transfer again, improved denitrogenation efficiency, optimized the flow field of flue gas.
Preferably, the protection angle steel 3 reduces the blocking area, and because of the adoption of the bent angle steel form, a sharp angle can be formed on the windward side, the air guide effect is improved, and the smoke flows more smoothly.
Specifically, the near-wind end of the ammonia spraying pipeline body 1 along the flue gas flowing direction S2 forms a windward surface with a sharp angle, and a leeward surface with the same sharp angle is formed at the far-wind end; the windward side and the leeward side are in smooth transition.
The ammonia spraying pipeline that this embodiment provided adopts ammonia spraying pipeline body 1 forms the windward side with the closed angle along the nearly wind end of flue gas flow direction S2, and the windward side with smooth transition between the leeward side for the ammonia spraying pipeline body of fusiformis structure optimizes the flow field that is on a parallel with the contact surface of flue gas flow direction, reduces the degree of wear of windward side, reduces system resistance.
Specifically, the windward side is formed by an arc protruding toward the outside of the ammonia injection pipeline body 1. Thereby making the change of the flow direction of the flue gas smoother.
Specifically, the ratio of the size of the maximum width of the ammonia injection pipeline body 1 parallel to the flue gas flowing direction S2 to the size of the maximum width of the ammonia injection pipeline body 1 perpendicular to the flue gas flowing direction S2 ranges from 1 to 30.
The ammonia injection pipeline that this embodiment provided, through the rational selection the ammonia injection pipeline body 1 be on a parallel with the size of the maximum width department that the flue gas flows to S2 with the ratio of the size of the maximum width department that ammonia injection pipeline body 1 perpendicular to flue gas flows to S2 to can be guaranteeing to spout under the unchangeable condition of ammonia flow, the area of keeping out the wind of ammonia injection pipeline is spouted in the rational adjustment, reduces the resistance of system, improves the efficiency of system, realizes accurate energy-conservation.
Specifically, the nozzle 2 is arranged at a far wind end position on the ammonia injection pipeline body 1 along the smoke flowing direction S2.
The ammonia injection pipeline that this embodiment provided, through with nozzle 2 set up in the far wind end position department along flue gas flow direction S2 on the ammonia injection pipeline body 1, thereby makes nozzle 2 is located the far wind end position of flue gas flow direction S2 for the ammonia can be with flue gas equidirectional blowout, guarantees the mixed effect of flue gas and ammonia, avoids the flue gas to the blowthrough of ammonia to cause the bad condition of ammonia blowout effect to take place.
Specifically, along the ammonia gas conveying direction S1, the ammonia injection pipe body 1 is provided with a plurality of the nozzles 2.
The ammonia spraying pipeline that this embodiment provided, through be provided with a plurality ofly on the ammonia spraying pipeline body 1 nozzle 2 increases the distribution quantity of nozzle 2 in flue gas pipeline, improves the area of contact of ammonia and flue gas, guarantees the denitration effect.
Specifically, on two opposite sides of the ammonia injection pipe body 1 in the direction perpendicular to the flue gas flow direction S2, a plurality of the nozzles 2 are alternately arranged in the ammonia gas conveying direction S1. Through a plurality of nozzle 2's setting in turn for the distribution position of nozzle 2 in flue gas pipeline is more reasonable, guarantees the denitration effect.
Specifically, a first end of the nozzle 2 is connected with the ammonia spraying pipe body 1, and a second end of the nozzle 2 extends in a direction away from the ammonia spraying pipe body 1; and the projection of the nozzle 2 is positioned outside the ammonia spraying pipe body 1 along the direction parallel to the flue gas flow direction S2.
Along being on a parallel with flue gas flow direction S2, through with the projection of nozzle 2 is located spout ammonia pipeline body 1' S the outside, avoid only spouting towards the place ahead of leeward side to increase the jet distance of ammonia, rationally set up the direction, increase the contact effect of ammonia and flue gas.
Specifically, along the direction parallel to the flue gas flow direction S2, the projection of the protection angle steel 3 is located outside the ammonia injection pipeline body 1.
Specifically, along a direction parallel to the ammonia gas conveying direction S1, the projection size of the protection angle steel 3 is greater than or equal to the projection size of the ammonia injection pipeline body 1.
Preferably, the angle steel 3 exceeds 1-3 cm of each side of the nozzle, so that the good protection effect is guaranteed, the wind shielding area is not excessively increased, and accurate energy conservation is realized.
Preferably, the protective angle steel 3 of the nozzle 2 is only designed at the position of the windward side of the nozzle 2, so that the using amount of the angle steel is reduced, and the cost is saved.
Specifically, the included angle between the nozzle 2 and the flue gas flowing direction S2 is alpha, wherein alpha is more than or equal to 15 degrees and less than or equal to 50 degrees.
Preferably, the angle steel 3 is parallel to the nozzle 2, so that the protection effect of the angle steel 3 on the nozzle 2 is ensured, the influence of flue gas flow on the nozzle 2 can be reduced to the maximum extent after the flue gas flow flows through the angle steel 3, and the blockage of the nozzle 2 is avoided.
Example two
Referring to fig. 1, the present embodiment provides a denitration ammonia injection device, including: the ammonia injection pipeline according to the first embodiment is disposed in the flue.
The traditional ammonia spraying pipelines with circular sections are arranged in parallel in the flue side by side, the projection area of the pipelines almost occupies 20% of the cross-sectional area of the whole flue, the effective cross section through which flue gas can pass is reduced, and the resistance and the energy consumption of the system are greatly increased.
According to the denitration ammonia injection device provided by the embodiment, the shuttle-shaped ammonia injection pipeline is adopted, and the size of the maximum width position, perpendicular to the flue gas flowing direction S2, of the ammonia injection pipeline body 1 is smaller than the size of the maximum width position, parallel to the flue gas flowing direction S2, of the ammonia injection pipeline body 1, so that the traditional circular cross section is replaced, under the condition that the cross sections are completely equal, the ammonia injection flow of the system is unchanged, and the effect of removing nitrogen oxides can be ensured; and the long side of the shuttle-shaped pipeline is parallel to the flow velocity direction of the flue gas, and the short side of the shuttle-shaped pipeline is perpendicular to the flow velocity of the flue gas.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. An ammonia injection conduit, comprising:
an ammonia injection pipeline body (1);
the nozzle (2) is arranged on the ammonia spraying pipeline body (1) and communicated with the inside of the ammonia spraying pipeline body (1); and
the protection angle steel (3) is arranged on the outer surface of the ammonia spraying pipeline body (1), is arranged at the position close to the wind end of the flue gas flowing direction S2 relative to the nozzle (2), and is suitable for at least partially covering the nozzle (2);
the section of the ammonia spraying pipeline body (1) perpendicular to the ammonia gas conveying direction S1 is of a shuttle-shaped structure; and the size of the maximum width of the ammonia spraying pipeline body (1) perpendicular to the flue gas flowing direction S2 is smaller than the size of the maximum width of the ammonia spraying pipeline body (1) parallel to the flue gas flowing direction S2;
the ammonia spraying pipeline body (1) forms a windward surface with a sharp angle along the near-wind end of the flue gas flowing direction S2, and forms a leeward surface with the same sharp angle at the far-wind end; the windward side and the leeward side are in smooth transition.
2. Ammonia injection duct according to claim 1, characterized in that the windward side consists of an arc that is convex towards the outside of the ammonia injection duct body (1).
3. The ammonia injection duct according to claim 1, characterized in that the ratio of the dimension of the ammonia injection duct body (1) at the maximum width parallel to the flue gas flow direction S2 to the dimension of the ammonia injection duct body (1) at the maximum width perpendicular to the flue gas flow direction S2 ranges from 1 to 30.
4. The ammonia injection duct according to claim 1, characterized in that the nozzle (2) is provided at a far wind end position on the ammonia injection duct body (1) in the flue gas flow direction S2.
5. The ammonia injection duct according to claim 4, characterized in that the ammonia injection duct body (1) is provided with a plurality of the nozzles (2) in the ammonia gas delivery direction S1.
6. The ammonia injection duct according to claim 5, characterized in that the plurality of nozzles (2) are arranged alternately in the ammonia gas delivery direction S1 on opposite sides of the ammonia injection duct body (1) in a direction perpendicular to the flue gas flow direction S2.
7. The ammonia injection pipe according to claim 6, wherein the first end of the nozzle (2) is connected with the ammonia injection pipe body (1), and the second end of the nozzle (2) extends away from the ammonia injection pipe body (1); and the projection of the nozzle (2) is positioned outside the ammonia injection pipeline body (1) along the direction parallel to the flue gas flow direction S2.
8. The ammonia injection duct according to claim 7, characterized in that the projection of the protection angle (3) is located outside the ammonia injection duct body (1) in a direction parallel to the flue gas flow direction S2.
9. The ammonia injection pipe according to claim 8, characterized in that the projection dimension of the protection angle steel (3) is greater than or equal to the projection dimension of the ammonia injection pipe body (1) along the direction parallel to the ammonia gas conveying direction S1.
10. Ammonia injection duct according to any of claims 1-9, characterized in that the nozzle (2) is at an angle α to the flue gas flow direction S2, where α is 15 ° and 50 °.
11. An ammonia injection device for denitration, comprising the ammonia injection pipeline as set forth in any one of claims 1 to 10, wherein the ammonia injection pipeline is disposed in a flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110298567.1A CN113144858A (en) | 2021-03-19 | 2021-03-19 | Ammonia spraying pipeline and denitration ammonia spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110298567.1A CN113144858A (en) | 2021-03-19 | 2021-03-19 | Ammonia spraying pipeline and denitration ammonia spraying device |
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| Publication Number | Publication Date |
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| CN113144858A true CN113144858A (en) | 2021-07-23 |
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|---|---|---|---|
| CN202110298567.1A Pending CN113144858A (en) | 2021-03-19 | 2021-03-19 | Ammonia spraying pipeline and denitration ammonia spraying device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114788995A (en) * | 2022-04-28 | 2022-07-26 | 中国华电科工集团有限公司 | Low-resistance energy-saving slurry spraying system for wet desulphurization and desulfurizing tower |
| CN114797409A (en) * | 2022-04-28 | 2022-07-29 | 中国华电科工集团有限公司 | Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney |
| CN114849436A (en) * | 2022-04-28 | 2022-08-05 | 中国华电科工集团有限公司 | Low-resistance energy-saving wet desulphurization slurry spraying system and desulphurization, dehumidification and integration tower |
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2021
- 2021-03-19 CN CN202110298567.1A patent/CN113144858A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114788995A (en) * | 2022-04-28 | 2022-07-26 | 中国华电科工集团有限公司 | Low-resistance energy-saving slurry spraying system for wet desulphurization and desulfurizing tower |
| CN114797409A (en) * | 2022-04-28 | 2022-07-29 | 中国华电科工集团有限公司 | Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney |
| CN114849436A (en) * | 2022-04-28 | 2022-08-05 | 中国华电科工集团有限公司 | Low-resistance energy-saving wet desulphurization slurry spraying system and desulphurization, dehumidification and integration tower |
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