CN214917199U - Urea solution spray gun with protection gas wall - Google Patents
Urea solution spray gun with protection gas wall Download PDFInfo
- Publication number
- CN214917199U CN214917199U CN202120691578.1U CN202120691578U CN214917199U CN 214917199 U CN214917199 U CN 214917199U CN 202120691578 U CN202120691578 U CN 202120691578U CN 214917199 U CN214917199 U CN 214917199U
- Authority
- CN
- China
- Prior art keywords
- cavity
- urea solution
- spray gun
- air
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Nozzles (AREA)
Abstract
The utility model discloses a urea solution spray gun with protection gas wall, including the first cavity that is used for letting in compressed air, a second cavity and nozzle head for letting in urea solution, inside first cavity was located to the second cavity, first cavity is steadilyd decrease by left to right for reducing cavity and its diameter, the nozzle head lid is in the exit of first cavity and second cavity and forms the urea solution atomizing and sprays the inner chamber, establish the solution atomizing injection aperture with first cavity and second cavity intercommunication on the nozzle head, the peripheral protection air current jet outlet who establishes perpendicular to spray gun axis of nozzle head, protection air current jet outlet and first cavity intercommunication. The utility model forms an air wall in the area needing protection, which can play a physical isolation effect, flicks the urea liquid drops with large particle size to the wall surface, and changes the impact direction of the urea solution; the small-particle-size urea liquid drops are carried away from the wall surface by the high-flow-rate air wall, so that the isolation of the urea solution and the wall surface of the separator is ensured, the corrosion of the urea liquid drops to the water-cooling pipe is prevented, and the small-particle-size urea liquid drops are suitable for preventing medium corrosion in scenes.
Description
Technical Field
The utility model belongs to the technical field of the urea solution spray gun, concretely relates to urea solution spray gun with protection gas wall.
Background
The NOx control of the circulating fluidized bed boiler generally adopts an SNCR denitration technology, if the spraying rigidity of a urea solution spray gun is insufficient or the atomization effect is not good, urea liquid drops are easily carried by high-speed flue gas and impact the side wall castable, and for the structural type of the water-cooled separator, the permeated urea solution continuously corrodes a water-cooled tube to influence the normal operation of a unit.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model aims to provide a urea solution spray gun with protection gas wall.
In order to realize the above purpose, reach above-mentioned technological effect, the utility model discloses a technical scheme be:
a urea solution spray gun with a protective air wall comprises a first cavity for introducing compressed air, a second cavity for introducing urea solution and a spray head, wherein the second cavity is arranged in the first cavity, the first cavity is a reducing cavity, the diameter of the first cavity is reduced from left to right, the spray head covers outlets of the first cavity and the second cavity to form a urea solution atomization spray inner cavity for spraying the atomized urea solution, a plurality of solution atomization spray small holes communicated with the first cavity and the second cavity are formed in the spray head, a plurality of protective air flow spray outlets perpendicular to the central axis of the spray gun are formed in the periphery of the spray head, the protective air flow spray outlets are communicated with the first cavity, the urea solution in the second cavity and a part of the compressed air in the first cavity are sprayed out through the solution atomization spray small holes, and the other part of the compressed air in the first cavity is sprayed out through the protective air flow spray outlets along the direction perpendicular to the central axis of the spray gun, forming an air wall.
Further, the diffusion angle alpha of the compressed air in the first cavity sprayed out through the protective airflow spraying outlet is larger than the diffusion angle beta of the urea solution in the second cavity sprayed out through the solution atomization spraying small holes.
Further, the spread angle α ranges from 13 ° to 30 °, and the spread angle β ranges from 8 ° to 25 °.
Further, a flow area S1 of the urea solution in the second cavity, a flow area S2 of the compressed air in the first cavity with the reduced diameter, a flow area S3 of the compressed air in the first cavity with the increased diameter, and a flow area S4 of the compressed air passing through the guard flow jet outlet satisfy the following conditions:
S2+S4＜S3
S2>S4
S2＝S1。
further, the value range of the flow area S1 of the urea solution in the second cavity is 0.1-1.0 cm2。
Furthermore, the compressed air inlet of the first cavity is different from the solution inlet of the second cavity, and the solution inlet of the second cavity is parallel to the axial direction of the spray gun.
Further, the value range of the compressed air inlet pressure Pa in the first cavity is 0.3-0.8 MPa, and the value range of the urea solution inlet pressure Ps in the second cavity is 0.2-0.6 MPa.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a urea solution spray gun with protection gas wall, which comprises a first cavity for introducing compressed air, a second cavity for introducing urea solution and a nozzle head, wherein the second cavity is arranged in the first cavity, the first cavity is a reducing cavity, the diameter of the first cavity is reduced from left to right, the nozzle head covers the outlets of the first cavity and the second cavity and forms a urea solution atomization injection inner cavity for injecting atomized urea solution, a plurality of solution atomization injection pores communicated with the first cavity and the second cavity are arranged on the nozzle head, a plurality of protection air flow injection outlets vertical to the axle line of the spray gun are arranged on the periphery of the nozzle head, the protection air flow injection outlets are communicated with the first cavity, the urea solution in the second cavity and a part of the compressed air in the first cavity are injected through the solution atomization injection pores, the other part of the compressed air in the first cavity is injected through the protection air flow injection outlets along the direction vertical to the axle line of the spray gun, forming an air wall. The utility model forms an air wall in the area needing protection, the air wall can play a physical isolation effect, and the urea liquid drops with large particle size are flicked off the wall surface, so as to change the impact direction of the urea solution; small-size particle diameter urea liquid drop is carried by high velocity of flow air wall and is left the wall, guarantees that urea solution and separator wall are isolated, prevents the corruption of urea liquid drop to the water-cooled tube, is applicable to and need to prevent in urea solution or other solution injection scenes that have the corruption risk to at the regional one air wall that forms of needing the protection, prevent corrosive solution and device contact increase of service life.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view of the nozzle head of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
In the description of the present invention, it should be noted that the terms "top", "bottom", "left", "right", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, a urea solution spray gun with a protective air wall comprises a first cavity 1 for introducing compressed air, a second cavity 2 for introducing urea solution, and a nozzle head 6, wherein the first cavity 1 is a variable diameter cavity, the diameter of the first cavity 1 decreases from left to right, the second cavity 2 is arranged in the first cavity 1, a solution inlet of the second cavity 2 extends out of the variable diameter part of the first cavity 1, the nozzle head 6 covers outlets at the right sides of the first cavity 1 and the second cavity 2 and forms a urea solution atomization injection inner cavity for injecting atomized urea solution, a plurality of solution injection pores 7 communicated with the first cavity 1 and the second cavity 2 are arranged on the nozzle head 6, a plurality of protective air injection outlets 8 perpendicular to the central axis of the spray gun are arranged on the periphery of the nozzle head 6 and are not in the same plane, the protective air injection outlets 8 are communicated with the first cavity 1, the urea solution in the second cavity 2 and a part of the compressed air in the first cavity 1 are sprayed out through the solution spraying small holes 7 along the urea solution spraying direction in fig. 1, and the other part of the compressed air in the first cavity 1 is sprayed out through the protective air flow spraying outlet 8 along the direction perpendicular to the central axis of the spray gun, which is protective air flow, and is sprayed out along the protective air flow spraying direction to form an air wall.
The protective airflow jet outlet 8 is located at the upstream of the solution jet small hole 7 and is 3-8 cm away.
The diffusion angle alpha of the compressed air in the first cavity 1 sprayed out through the protective airflow spraying outlet 8 is larger than the diffusion angle beta of the urea solution in the second cavity 2 sprayed out through the solution atomization spraying small hole 7, the diffusion angle alpha ranges from 13 degrees to 30 degrees, and the diffusion angle beta ranges from 8 degrees to 25 degrees.
The flow area S1 of the urea solution in the second cavity 2, the flow area S2 of the compressed air in the first cavity 1 with the reduced diameter, the flow area S3 of the compressed air in the first cavity 1 with the increased diameter, and the flow area S4 of the compressed air through the guard flow jet outlet 8 satisfy the following conditions:
S2+S4＜S3
S2>S4
S2＝S1
S1＝0.1～1.0cm2。
the compressed air inlet 3 of the first cavity 1 is on a different side from the solution inlet 4 of the second cavity 2, the solution inlet 4 of the second cavity 2 being parallel to the lance axis direction.
The value range of the compressed air inlet pressure Pa in the first cavity 1 is 0.3-0.8 Mpa, and the value range of the urea solution inlet pressure Ps in the second cavity 2 is 0.2-0.6 Mpa.
The utility model discloses a theory of operation does:
compressed air is sprayed out of the spray gun in two paths, urea solution in the second cavity 2 and part of compressed air in the first cavity 1 are sprayed out in the urea solution spraying direction in the graph 1 through the solution spraying small holes 7, the compressed air is mixed with the urea solution and has a fogging effect, in the other path, the other part of compressed air in the first cavity 1 is sprayed out in the direction perpendicular to the central axis of the spray gun through the protective air flow spraying outlet 8 and is protective air flow, the compressed air is sprayed out in the protective air flow spraying direction in the graph 1 and is used for forming an air wall and protecting the wall surface of the separator 5, the urea solution and the wall surface of the separator 5 are isolated, and the corrosion of urea liquid drops to a water cooling pipe is prevented.
The utility model discloses the part of not specifically describing adopt prior art can, do not describe here any more.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.
Claims (7)
1. A urea solution spray gun with a protective air wall is characterized by comprising a first cavity for introducing compressed air, a second cavity for introducing urea solution and a nozzle head, wherein the second cavity is arranged in the first cavity, the first cavity is a reducing cavity, the diameter of the first cavity is reduced from left to right, the nozzle head covers outlets of the first cavity and the second cavity and forms a urea solution atomization injection inner cavity for injecting the atomized urea solution, a plurality of solution atomization injection small holes communicated with the first cavity and the second cavity are formed in the nozzle head, a plurality of protective air flow injection outlets perpendicular to the central axis of the spray gun are formed in the periphery of the nozzle head, the protective air flow injection outlets are communicated with the first cavity, the urea solution in the second cavity and a part of the compressed air in the first cavity are injected through the solution atomization injection small holes, and the other part of the compressed air in the first cavity is injected through the protective air flow injection outlets along the direction perpendicular to the central axis of the spray gun, forming an air wall.
2. The urea solution spray gun with the protective air wall as claimed in claim 1, wherein the diffusion angle α of the compressed air in the first cavity sprayed through the protective air flow spraying outlet is larger than the diffusion angle β of the urea solution in the second cavity sprayed through the solution atomization spraying orifice.
3. The urea solution spray gun with a protective gas wall according to claim 2, wherein the diffusion angle α is in a range of 13 ° to 30 °, and the diffusion angle β is in a range of 8 ° to 25 °.
4. The urea solution spray gun with a shielding air wall as claimed in claim 1, wherein the flow area S1 of the urea solution in the second cavity, the flow area S2 of the compressed air in the first cavity with the reduced diameter, the flow area S3 of the compressed air in the first cavity with the increased diameter and the flow area S4 of the compressed air through the shielding air jet outlet satisfy the following conditions:
S2+S4＜S3
S2>S4
S2＝S1。
5. the urea solution spray gun with the protective air wall as claimed in claim 4, wherein the flow area S1 of the urea solution in the second cavity ranges from 0.1 cm to 1.0cm2。
6. The urea solution spray gun with a protective air wall as claimed in claim 1, wherein the compressed air inlet of the first cavity is different from the solution inlet of the second cavity, and the solution inlet of the second cavity is parallel to the axial direction of the spray gun.
7. The urea solution spray gun with the protective air wall as claimed in claim 1, wherein the inlet pressure of the compressed air in the first cavity is 0.3-0.8 Mpa, and the inlet pressure of the urea solution in the second cavity is 0.2-0.6 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120691578.1U CN214917199U (en) | 2021-04-06 | 2021-04-06 | Urea solution spray gun with protection gas wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120691578.1U CN214917199U (en) | 2021-04-06 | 2021-04-06 | Urea solution spray gun with protection gas wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214917199U true CN214917199U (en) | 2021-11-30 |
Family
ID=79047594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120691578.1U Active CN214917199U (en) | 2021-04-06 | 2021-04-06 | Urea solution spray gun with protection gas wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214917199U (en) |
-
2021
- 2021-04-06 CN CN202120691578.1U patent/CN214917199U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5730024B2 (en) | Spray nozzle and combustion apparatus having spray nozzle | |
| US20110147491A1 (en) | Internal mix air atomizing spray nozzle assembly | |
| JP5718055B2 (en) | Apparatus and method for changing the characteristics of a multiphase jet | |
| EP2542310A1 (en) | A full cone spray nozzle for a low pressure fire protection system | |
| CN105772254B (en) | Spiral shape spray nozzle device | |
| CN209108502U (en) | Fine mist spray head | |
| CN108722703B (en) | Reverse spray type washing nozzle | |
| KR0152657B1 (en) | Airfoil lance apparatus | |
| CN214917199U (en) | Urea solution spray gun with protection gas wall | |
| CN109045967A (en) | A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler | |
| CN212090635U (en) | Vortex spraying atomizing nozzle | |
| CN103007724A (en) | Swirl type denitration ejector of circulating fluidized bed | |
| CN202849078U (en) | Novel spray gun applied to urea pryolysis ammonia production system | |
| US20140034752A1 (en) | Atomizer | |
| WO2009139069A1 (en) | Assembled-type mist nozzle and fire-extinguishing equipment including the mist nozzle | |
| CN206951439U (en) | A kind of New-type Swirl Flow atomization cleaning shower nozzle | |
| CN206273336U (en) | Novel denitration nozzle base, multiinjector denitration spray gun barral of a gun and denitration spray gun | |
| CN207478836U (en) | The exterior mixing atomizing lance of surface peening | |
| CN206415251U (en) | A kind of denitration rifle | |
| CN204892171U (en) | Hollow cone swirl nozzle | |
| CN207324496U (en) | Novel anti-blockage nozzle applied to SNCR-SCR direct-injection systems | |
| JP2017074542A (en) | Return type spray nozzle | |
| CN201867051U (en) | Nozzle for high-temperature tunnel kiln spray gun | |
| CN220249982U (en) | Medium atomizing oil gun | |
| CN218360027U (en) | Constant back pressure is with runner fluid atomization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |