CN208695305U - A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid - Google Patents
A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid Download PDFInfo
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- CN208695305U CN208695305U CN201820014001.5U CN201820014001U CN208695305U CN 208695305 U CN208695305 U CN 208695305U CN 201820014001 U CN201820014001 U CN 201820014001U CN 208695305 U CN208695305 U CN 208695305U
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- ammonia
- throttling element
- outer tube
- spout
- inner tube
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Abstract
The utility model discloses a kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid, throttling element is detachably connected in ammonia outlet, the adjustable throttle orifice in aperture is formed on throttling element, there is the throttling element of different pore size by replacing, adjust the ammonia discharge of the ammonia outlet；Outer tube is set in inner tube, at least one spout is formed on outer tube, for exporting ammonia to nozzle exterior.It is different according to flue gas in flue flow velocity, the different throttling element in replacement throttle orifice aperture, the adjustable amount for spraying ammonia.Simultaneously, spout is on the side wall of outer tube, when flue gas stops discharge or flue gas flow is too small, the particulate matters such as dust, flying dust in flue gas are settled downwards due to the effect of gravity, on the surface for the upper wall surface that outer tube only can be deposited in, the spout of nozzle is effectively prevented by the dust in flue gas, the substances blocking spout such as flying dust influences the effect of purifying smoke.
Description
Technical field
The utility model belongs to technical field of environment protection equipment, and in particular to a kind of for SCR denitration system ammonia-spraying grid
Anti-blocking throttle type nozzle
Background technique
SCR denitration technology is the mainstream technology of thermal power plant discharged nitrous oxides control, and SCR denitration technology passes through injection
The reducing agents such as NH3 and NOx, which react, generates nitrogen to realize removal of nitrogen oxide.Ammonia-spraying grid is currently used NH3 spray
NH3 is injected into boiler flue by the jet pipe equipped with nozzle, is realized by injection device by forming for NH3 main pipe and Duo Gen branch pipe
The mixing of ammonia cigarette.
Chinese patent CN202105595U discloses a kind of spray ammonia grid, including upper outer tube, opposite with upper outer tube to set
The lower outer tube set, it is nested with upper outer tube in upper inner sleeve, the lower inner sleeve being nested in lower outer tube, upper outer tube with
One end of lower outer tube is connected by housing tube cover plate, and upper inner sleeve is connect with one end of lower inner sleeve by inner sleeve tube cover plate,
The other end is equipped with inner sleeve pipe flange, and inner sleeve tube cover plate and inner tube pipe flange form cavity A, inner sleeve tube cover plate and housing tube cover plate it
Between formed cavity B.Outer tube is equipped with the first aperture, and inner sleeve is equipped with second orifice, wherein the perforated area of the first aperture
The first aperture and second orifice weight are changed by the movement of actuating mechanism controls inner sleeve greater than the perforated area of second orifice
The size of area is closed, to control the flow for spraying gas.The spray ammonia grid of this structure, needs through actuating mechanism controls inner sleeve
Movement, come control spray gas flow, structure is complicated, during ammonia cigarette hybrid manipulation, in flue various flue dust be easy
It flows into executing agency, leads to actuator failure, and then influence to execute the proper motion of structure.
Utility model content
The technical problem to be solved by the present invention is to overcome to spray setting execution structure in ammonia equipment in the prior art, lead
It causes device structure complicated and is easy to appear the defect of failure.
For this purpose, the utility model provides a kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid, including
Inner tube has the ammonia imports and ammonia outlet being connected with ammonia equipment；
It is detachably connected with throttling element in the ammonia outlet, the adjustable throttling in aperture is formed on the throttling element
Hole has the throttling element of different pore size by replacing, adjusts the ammonia discharge of the ammonia outlet.
Preferably, external screw thread, said inner tube portion corresponding with the throttling element are formed on the outer wall of the throttling element
Position forms the internal screw thread matched with the external screw thread.
Preferably, the one end of the throttling element far from said inner tube forms first step to the direction far from axis, institute
First step is stated to limit the relative position between the throttling element and said inner tube.
Preferably, further includes: outer tube is set in said inner tube, at least one spout is formed on the outer tube, described
Spout is exporting ammonia to nozzle exterior.
Preferably, the notch setting is on the outer tube wall.
Preferably, the axisymmetrical setting of the relatively described outer tube of the spout.
Preferably, said inner tube forms boss to the direction far from its center of circle, and the outer tube is connected on the boss.
Preferably, external screw thread is formed on the boss, is formed in matching with the external screw thread on the outer tube
Screw thread.
Preferably, second step is formed on the boss, the second step is to limit the outer tube described interior
Position on pipe.
Technical solutions of the utility model have the advantages that
1. nozzle provided by the utility model, including the inner tube being connected with ammonia equipment, in the ammonia gas outlet of inner tube
On be removably connected with throttling element, the adjustable throttle orifice in aperture is formed on throttling element.The nozzle is placed in flue, in cigarette
The big throttling element in throttle orifice aperture can be used in gas velocity large flue, can be replaced with throttle orifice in the small flue of flue gas flow rate
The small throttling element in aperture.
According to flue gas flow rate difference, the different throttling element in replacement throttle orifice aperture, the adjustable amount for spraying ammonia is used
There is the throttling element of large aperture throttle orifice, the flow of the ammonia of release is big, in the big flue of flue gas flow rate, there can be sufficient ammonia
Gas is reacted with flue gas, realizes the purpose of sufficiently cleaned up flue gas.Use the throttling element for having small-bore throttle orifice, the ammonia of release
Flow it is small, in the small flue of flue gas flow rate, reacted in the ammonia for providing sufficient with flue gas, realize sufficiently cleaned up flue gas
While can save the usage amount of ammonia, saved the cost of purifying smoke.Therefore, nozzle provided by the utility model is not required to
To use executing agency that the flow for adjusting release ammonia can be realized, structure is simpler, while also avoiding in the prior art
Flue dust flows into after executing agency to the defect for influencing executing agency's normal work.
2. nozzle provided by the utility model, it is also arranged with outer tube in inner tube, at least one spout is formed on outer tube, sprayed
Mouthful be arranged on outer tube wall, ammonia can be exported to outside outer tube wall from the ammonia outlet of inner tube, allow ammonia from
The side release of nozzle.In flue, the vertical mode of nozzle, the ammonia outlet of inner tube is upward, and spout is on the side wall of outer tube, cigarette
Gas discharges upwards.After ammonia enters from the ammonia imports of inner tube, from spout to the side release of outer tube.Stop discharging in flue gas
Or flue gas flow it is too small when, the particulate matters such as dust, flying dust in flue gas can be only deposited in outer since the effect of gravity settles downwards
On the surface of the upper wall surface of pipe, the spout of nozzle is effectively prevented by the dust in flue gas, the substances blocking spout shadow such as flying dust
The effect for ringing purifying smoke reduces the cost of maintenance nozzle.
3. nozzle provided by the utility model, external screw thread is formed on the outer wall of throttling element, inner tube is corresponding with throttling element
Position form the internal screw thread that external screw thread matches, throttling element is connect by screw thread with inner tube, and fixation, structure is simple,
It is conveniently replaceable.First step is formed to the direction far from axis in the one end of throttling element far from inner tube, throttling element can be prevented
Fixed tension causes to be difficult to replace.
4. nozzle provided by the utility model, boss is formed to the direction far from its center of circle on inner tube external wall beneath, it is convex
External screw thread is formed on platform, and the internal screw thread matched with external screw thread is formed on outer tube.Outer tube is threadedly secured to inner tube
On boss, fixation, structure is simple, easy to disassemble to get off to be replaced or be cleaned.Second step is formed on boss, is prevented
The fixed tension of outer tube causes to be difficult to dismantle.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
It is sprayed provided in Fig. 1 the utility model embodiment for the anti-blocking throttle type of SCR denitration system ammonia-spraying grid
The longitudinal profile structure schematic of mouth.
Description of symbols:
1- inner tube；11- second boss；
2- throttling element；21- throttle orifice；22- first boss
3- outer tube；31- spout.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
The present embodiment provides a kind of anti-blocking throttle type nozzles for SCR denitration system ammonia-spraying grid, as shown in Figure 1,
Including inner tube 1, lower section is the ammonia imports being connected with ammonia equipment, and top is ammonia outlet.It is detachable in ammonia outlet
Be connected with throttling element 2, external screw thread is formed in the outside wall surface of throttling element 2, on the position inner wall that inner tube 1 is connect with throttling element
Form the internal screw thread matched with 2 external screw thread of throttling element.The outer wall on 2 top of throttling element is formed away from the direction of axis
The width of first step 22, first step 22 is consistent with the pipe thickness of inner tube 1.In 2 precession inner tube 1 of throttling element, the phase of screw thread
Mutually cooperation is so that 2 fixation of throttling element, while the tension that the first step 22 being arranged can prevent throttling element 2 from revolving causes to be difficult to
Disassembly.
Throttle orifice 21 is also formed on throttling element 2, when nozzle is placed in flue, the aperture of throttle orifice 21 can be according to need
The flow velocity of the flue gas in flue is wanted to be changed.The big throttling element in 21 aperture of throttle orifice can be used in flue gas flow rate large flue,
Such as aperture is 30mm throttling element；The small throttling element in 21 aperture of throttle orifice, example can be replaced in the small flue of flue gas flow rate
Such as the throttling element that aperture is 5mm.As interchangeable embodiment, the upper throttle orifice of throttling element 2 can be one, two, three
A, four, five etc..
As shown in Figure 1, having molding boss, the outer wall of boss to the direction far from the center of circle on the external wall beneath face of inner tube 1
External screw thread is formed on face, by the way that boss is arranged, there are gas between the upper wall surface and throttling element 2 and the outside wall surface of inner tube 1 of outer tube 3
The gap that body passes through；The inner wall of 3 lower section of outer tube forms the internal screw thread matched with internal screw thread on boss, and outer tube 3 passes through spiral shell
Line is connect with the boss in inner tube 1.There are two spout 31, axisymmetrical of the spout 31 with respect to outer tube 3 for molding on the tube wall of outer tube 3
Setting.The flow velocity that spout 31 can according to need the flue gas in flue is changed, and spray can be used in flue gas flow rate large flue
The big outer tube in 31 apertures of mouth, such as aperture are 15mm；It is small that 31 aperture of spout can be replaced in the small flue of flue gas flow rate
Outer tube, such as aperture are 5mm.As interchangeable embodiment, spout 31 on outer tube 3 can be two, three, four
It is a, five etc..
As shown in Figure 1, the lower section in outer wall of boss face forms second step 11, second step away from the direction of axis
11 width is consistent with the pipe thickness of outer tube 3.Outer tube 3 is tightened on the boss of inner tube 1 by screw thread, fixation, structure
Simply, easy to disassemble to get off to be replaced or be cleaned.Second step 11 can prevent the fixed tension of outer tube from causing to be difficult to dismantle.
As interchangeable embodiment, spout 31 along 3 tube wall of outer tube circumferentially while, can be axial along outer tube 3
Direction carries out arrangement up and down, can increase the flow of release ammonia.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among still in the protection scope of the utility model.
Claims (9)
1. a kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid, which is characterized in that including
Inner tube (1) has the ammonia imports and ammonia outlet being connected with ammonia equipment；
It is detachably connected in the ammonia outlet throttling element (2), the adjustable throttle orifice in aperture is formed on the throttling element
(21), there is the throttling element (2) of different pore size by replacing, adjust the ammonia discharge of the ammonia outlet.
2. nozzle according to claim 1, which is characterized in that form external screw thread on the outer wall of the throttling element (2), institute
It states inner tube position corresponding with the throttling element and forms the internal screw thread matched with the external screw thread.
3. nozzle according to claim 1 or 2, which is characterized in that the one end of the throttling element far from said inner tube is to remote
The direction of off-axis line forms first step (22), the first step (22) to limit the throttling element and said inner tube it
Between relative position.
4. nozzle according to claim 1 or 2, which is characterized in that further include: outer tube (3) is set in said inner tube (1)
On, at least one spout (31) is formed on the outer tube (3), the spout (31) is exporting ammonia to nozzle exterior.
5. nozzle according to claim 4, which is characterized in that the spout (31) is arranged on the outer tube (3) tube wall.
6. nozzle according to claim 5, which is characterized in that the axis pair of the relatively described outer tube (3) of the spout (31)
Claim setting.
7. nozzle according to claim 5 or 6, which is characterized in that said inner tube (1) is formed to the direction far from its center of circle
There is boss, the outer tube is connected on the boss.
8. nozzle according to claim 7, which is characterized in that external screw thread is formed on the boss, on the outer tube (3)
Form the internal screw thread matched with the external screw thread.
9. nozzle according to claim 8, which is characterized in that formed on the boss second step (11), described
Two steps (11) are to limit position of the outer tube (3) on said inner tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820014001.5U CN208695305U (en) | 2018-01-04 | 2018-01-04 | A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820014001.5U CN208695305U (en) | 2018-01-04 | 2018-01-04 | A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208695305U true CN208695305U (en) | 2019-04-05 |
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ID=65933695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820014001.5U Active CN208695305U (en) | 2018-01-04 | 2018-01-04 | A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208695305U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983545A (en) * | 2018-01-04 | 2018-05-04 | 中国华电集团科学技术研究总院有限公司 | A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid |
| CN114130557A (en) * | 2021-11-30 | 2022-03-04 | 中冶京诚工程技术有限公司 | Electrostatic powder spray gun |
-
2018
- 2018-01-04 CN CN201820014001.5U patent/CN208695305U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983545A (en) * | 2018-01-04 | 2018-05-04 | 中国华电集团科学技术研究总院有限公司 | A kind of anti-blocking throttle type nozzle for SCR denitration system ammonia-spraying grid |
| CN114130557A (en) * | 2021-11-30 | 2022-03-04 | 中冶京诚工程技术有限公司 | Electrostatic powder spray gun |
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