CN215742914U - Ammonia gas and air mixing device for flue gas denitration system - Google Patents
Ammonia gas and air mixing device for flue gas denitration system Download PDFInfo
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- CN215742914U CN215742914U CN202121547167.1U CN202121547167U CN215742914U CN 215742914 U CN215742914 U CN 215742914U CN 202121547167 U CN202121547167 U CN 202121547167U CN 215742914 U CN215742914 U CN 215742914U
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Abstract
The utility model discloses an ammonia gas and air mixing device for a flue gas denitration system, which comprises an air inlet section, a mixing section and a mixed gas outlet section, wherein an ammonia gas spray pipe is arranged on the air inlet section, the air inlet section is gradually closed according to the airflow movement direction, the mixed gas outlet section is gradually flared according to the airflow movement direction, an airflow mixing and disturbing device is arranged in the mixing section, the airflow mixing and disturbing device comprises a plurality of first blades and second blades which are annularly arranged, and the rotating direction of the first blades is opposite to that of the second blades. The utility model can increase the flow rate of the mixed gas of ammonia and air after passing through the mixing section, and increase the disturbance of the mixed gas flow after passing through the gas flow mixing and disturbing device, so that the ammonia and the air are fully mixed, and the reaction efficiency of the flue gas denitration system is greatly improved.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration treatment, in particular to an ammonia gas and air mixing device for a flue gas denitration system.
Background
Liquid ammonia is used as an important denitration raw material in the SCR technology, is gasified by an evaporator before being injected into an SCR reactor, is mixed with air in a mixer according to a certain proportion, and is then injected into the SCR reactor. Therefore, the mixing effect of the ammonia air mixer directly restricts the working stability and high efficiency of the flue gas denitration system.
The present ammonia air mixer is mainly a venturi mixer, and the Chinese utility model with the application number of CN201120067465.0 discloses an ammonia air venturi mixer in the prior art, which comprises a venturi tube and a cylinder body connected with the venturi tube, and a nozzle is arranged at the inlet of the venturi tube. At present, the ammonia and air venturi mixer is widely used, but in practical application, the traditional venturi mixer requires that the distance between a mixed gas outlet flange and the right side of a diffuser pipe is long enough to meet the requirement of mixing uniformity, and the mixing effect of the mixer is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ammonia air mixing device for a flue gas denitration system, which solves the problem of poor mixing effect of a mixer in the background art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to an ammonia gas and air mixing device for a flue gas denitration system, which comprises an air inlet section, a mixing section and a mixed gas outlet section, wherein an ammonia gas spray pipe is arranged on the air inlet section, the air inlet section is gradually closed according to the airflow movement direction, the mixed gas outlet section is gradually flared according to the airflow movement direction, an airflow mixing and disturbing device is arranged in the mixing section, the airflow mixing and disturbing device comprises a first fixing sleeve and a second fixing sleeve which are sequentially sleeved, a plurality of first blades are annularly arranged in a gap between the first fixing sleeve and the second fixing sleeve, and two ends of each first blade are respectively connected to the first fixing sleeve and the second fixing sleeve; a plurality of second blades are annularly arranged in a gap between the second fixing sleeve and the mixing section, and two ends of each second blade are respectively connected to the inner walls of the second fixing sleeve and the mixing section; the rotation direction of each first blade is opposite to that of each second blade.
Further, the air inlet section, the mixing section and the mixed gas outlet section are detachably connected together through a flange structure.
Further, the ammonia gas nozzle comprises an ammonia gas inlet section, an elbow connecting section and an ammonia gas spraying section which are sequentially connected, wherein the ammonia gas inlet section penetrates through the side wall of the air inlet section and is welded on the air inlet section; the ammonia gas ejecting section has the same axis as the mixing section, and the tip thereof extends to the inlet of the mixing section.
Furthermore, a plurality of auxiliary spray holes are formed in the outer wall of the ammonia gas spraying section.
Compared with the prior art, the utility model has the beneficial technical effects that:
the utility model can increase the flow rate of the mixed gas of ammonia and air after passing through the mixing section, and increase the disturbance of the mixed gas flow after passing through the gas flow mixing and disturbing device, so that the ammonia and the air are fully mixed, and the reaction efficiency of the flue gas denitration system is greatly improved.
Drawings
The utility model is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural diagram of a main view of an ammonia gas and air mixing device for a flue gas denitration system according to the present invention;
FIG. 2 is a schematic structural diagram of an airflow mixing and disturbing apparatus according to the present invention;
FIG. 3 is a schematic structural diagram of the ammonia gas nozzle of the present invention.
Description of reference numerals: 1. an air inlet section; 2. a mixing section; 3. a mixed gas outlet section; 4. an ammonia gas nozzle; 401. an ammonia gas inlet section; 402. an elbow connecting section; 403. an ammonia gas ejection section; 404. auxiliary spraying holes; 5. an air flow mixing and disturbing device; 501. a first fixing sleeve; 502. a second fixing sleeve; 503. a first blade; 504. a second blade; 6. and (4) a flange structure.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the embodiment discloses an ammonia air mixing device for a flue gas denitration system, including air inlet section 1, mixing section 2 and mixed gas outlet section 3, is provided with ammonia spray pipe 4 on the air inlet section 1, and air inlet section 1 is the form of closing up gradually according to the air current direction of motion, and mixed gas outlet section 3 is the flaring form gradually according to the air current direction of motion. The air inlet section 1, the mixing section 2 and the mixed gas outlet section 3 form a venturi tube.
As shown in fig. 2, an air flow mixing and disturbing device 5 is disposed in the mixing section 2, the air flow mixing and disturbing device 5 includes a first fixing sleeve 501 and a second fixing sleeve 502 which are sequentially sleeved, a plurality of first blades 503 are annularly disposed in a gap between the first fixing sleeve 501 and the second fixing sleeve 502, and two ends of each first blade 503 are respectively connected to the first fixing sleeve 501 and the second fixing sleeve 502; a plurality of second blades 504 are annularly arranged in a gap between the second fixing sleeve 502 and the mixing section 2, and two ends of each second blade 504 are respectively connected to the inner walls of the second fixing sleeve 502 and the mixing section 2; the rotational direction of each first blade 503 is opposite to the rotational direction of each second blade 504.
Since the direction of rotation of the first vane 204 is opposite to the direction of rotation of each second vane 205, the air mixed with the ammonia gas is disturbed by the first vane 204 and the second vane 205, and then the air and the ammonia gas are sufficiently mixed.
In this embodiment, the air inlet section 1, the mixing section 2 and the mixed gas outlet section 3 are detachably connected together through a flange structure 6, so that the disassembly and maintenance of different pipe sections are facilitated.
As shown in fig. 3, the ammonia gas nozzle 4 comprises an ammonia gas inlet section 401, an elbow connecting section 402 and an ammonia gas spraying section 403 which are connected in sequence, wherein the ammonia gas inlet section 401 penetrates through the side wall of the air inlet section 1 and is welded on the air inlet section 1; the ammonia gas ejecting section 403 is coaxial with the mixing section 2 and has its end extending to the inlet of the mixing section 2. The outer wall of the ammonia gas spraying section 403 is provided with a plurality of auxiliary spraying holes 404, and ammonia gas can be sprayed from the auxiliary spraying holes 404, so that the mixing effect of the ammonia gas and air is further improved.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (4)
1. The utility model provides an ammonia air mixing arrangement for flue gas denitration system, includes air inlet section (1), mixing section (2) and mist outlet section (3), be provided with ammonia spray tube (4) on air inlet section (1), air inlet section (1) is the form of closing up gradually according to the air current direction of motion, mist outlet section (3) is flaring form gradually according to the air current direction of motion, be provided with air current mixing disturbance device (5), its characterized in that in mixing section (2): the air flow mixing and disturbing device (5) comprises a first fixed sleeve (501) and a second fixed sleeve (502) which are sequentially sleeved, a plurality of first blades (503) are annularly arranged in a gap between the first fixed sleeve (501) and the second fixed sleeve (502), and two ends of each first blade (503) are respectively connected to the first fixed sleeve (501) and the second fixed sleeve (502); a plurality of second blades (504) are annularly arranged in a gap between the second fixing sleeve (502) and the mixing section (2), and two ends of each second blade (504) are respectively connected to the inner walls of the second fixing sleeve (502) and the mixing section (2); the rotational direction of each first blade (503) is opposite to the rotational direction of each second blade (504).
2. The ammonia and air mixing device for the flue gas denitration system of claim 1, wherein: the air inlet section (1), the mixing section (2) and the mixed gas outlet section (3) are detachably connected together through a flange structure (6).
3. The ammonia and air mixing device for the flue gas denitration system of claim 1, wherein: the ammonia gas nozzle (4) comprises an ammonia gas inlet section (401), an elbow connecting section (402) and an ammonia gas spraying section (403) which are sequentially connected, wherein the ammonia gas inlet section (401) penetrates through the side wall of the air inlet section (1) and is welded on the air inlet section (1); the ammonia gas ejection section (403) has the same axis as the mixing section (2) and has a tip end extending to the inlet of the mixing section (2).
4. The ammonia and air mixing device for the flue gas denitration system of claim 3, wherein: the outer wall of the ammonia gas spraying section (403) is provided with a plurality of auxiliary spraying holes (404).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121547167.1U CN215742914U (en) | 2021-07-08 | 2021-07-08 | Ammonia gas and air mixing device for flue gas denitration system |
| AU2021105564A AU2021105564A4 (en) | 2021-07-08 | 2021-08-16 | Ammonia-air mixing device for flue gas denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121547167.1U CN215742914U (en) | 2021-07-08 | 2021-07-08 | Ammonia gas and air mixing device for flue gas denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215742914U true CN215742914U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121547167.1U Active CN215742914U (en) | 2021-07-08 | 2021-07-08 | Ammonia gas and air mixing device for flue gas denitration system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215742914U (en) |
| AU (1) | AU2021105564A4 (en) |
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2021
- 2021-07-08 CN CN202121547167.1U patent/CN215742914U/en active Active
- 2021-08-16 AU AU2021105564A patent/AU2021105564A4/en active Active
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| AU2021105564A4 (en) | 2021-10-14 |
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