CN208230155U

CN208230155U - Supersonic speed denitration spray gun

Info

Publication number: CN208230155U
Application number: CN201721620284.XU
Authority: CN
Inventors: 胡建廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2018-12-14
Anticipated expiration: 2027-11-28

Abstract

The utility model relates to a kind of denitration spray guns, the widely used supersonic speed denitration spray gun especially in boiler smoke processing, it include inner tube, air inlet, gun platform, outer tube, distributor, air drain, fluid hole, rifle neck, tapered mouth, aditus laryngis, flaring mouth, rifle cap, mixing chamber, throttling cone and spray orifice, liquid distributor is arranged in rifle neck, enter tapered mouth-aditus laryngis-flaring mouth after vapor-liquid two phases mixing, it is gradually accelerated, and it accelerates to more than velocity of sound, and accelerate to mix with supersonic condition, liquid is wrapped up by compressed air, stress, finally gasify, atomization is horizontal to reach molecular level.

Description

Supersonic speed denitration spray gun

Technical field

The present invention relates to a kind of flue gas processing devices, widely used super especially in the processing of station boiler exhaust emissions Velocity of sound denitration spray gun.

Background technique

At present, the widely used denitration spray gun in boiler especially Rear of Utility Boiler gas cleaning processing, it is main Effect is the NO sprayed into ammonium hydroxide or urea liquid, with flue gas into flue gas_xChemical combination, is reduced into nitrogen, harmless emission, Primary structure form is simple and mechanical+compressed air atomizing type, and some lance body structures are simple, but structure is complicated for pipette tips, and have Pipette tips structure it is simple, but lance body structure is complicated, but after all, and mostly complicated regardless of having in its structure, atomizing effect has Wait improve, that is to say, that denitration medium can also further save, and reason, which is that, does not all grasp and make good use of completely pressure The self character of contracting air does not all play its air dynamic behaviour well, rests on simple, inefficient utilization high-quality energy The phenomenon that source, for this purpose, needing to improve.

Summary of the invention

That the technical problem to be solved by the present invention is to the one kind provided for above-mentioned state of the art is simple, reliable, Efficient supersonic speed denitration spray gun.

The present invention solve above-mentioned technical problem used by technical solution be supersonic speed denitration spray gun, it include gun body and Pipette tips；The gun body includes inner and outer tubes, and is linked up both inner tube and outer tube by gun platform；The pipette tips include There are rifle neck and rifle cap, rifle cap is mounted on rifle neck, then is linked up with gun body, and the supersonic speed denitration spray gun is thus constituted.

The inner tube that is mainly characterized by of the gun body of the supersonic speed denitration spray gun walks denitration liquid, and outer tube walks compressed air, structure The cannula structure being placed at inner tube in outer tube.

Being mainly characterized by of the rifle neck of the supersonic speed denitration spray gun is internally provided with liquid distributor, which is connected with The two dimensional fluid of two phase flow, i.e. denitration liquid and compressed air flows through simultaneously.

The rifle cap inner cavity that is mainly characterized by of the rifle cap of the supersonic speed denitration spray gun is one-dimensional mixed flow, and rifle cap head portion is uniform Several through-holes are offered, mixed flow enters injection outward at a certain angle after through-hole.

Detailed description of the invention

The overall structure cross-sectional view of 1 supersonic speed denitration spray gun of attached drawing, attached drawing 2 are the rifle cap efflux angles of supersonic speed denitration spray gun Three-view diagram.

Specific embodiment

The invention will be further described with reference to the accompanying drawings:

Structure of the invention is as follows:

Referring to shown in attached drawing 1, Fig. 2, supersonic speed denitration spray gun includes: inner tube 1, gun platform 3, outer tube 4, is divided air inlet 2 Orchestration 5, air drain 6, fluid hole 7, rifle neck 8, tapered mouth 9, aditus laryngis 10, flaring mouth 11, rifle cap 12, mixing chamber 13,14 and of throttling cone Spray orifice 15.Each component locations and connecting relation are as follows:

The supersonic speed denitration spray gun includes: gun body, rifle neck and rifle cap.

Wherein the gun body of the supersonic speed denitration spray gun includes inner tube 1, air inlet 2, gun platform 3, outer tube 4；Inner tube 1 and outer Pipe 4 is welded on one heart on gun platform 3；Air inlet 2 is then welded in 4 side wall of outer tube；The pipette tips include rifle neck 8 and rifle cap 12, rifle Neck 8 is mounted on the outlet end of outer tube 4, and rifle cap 12 is mounted on the outlet end of rifle neck 8.

Distributor 5 is wherein disposed in the rifle neck 8 of the supersonic speed denitration spray gun, the distributor 5 is mounted on inner tube 1 Outlet end；Several air drains 6 are uniformly provided on the outer edge of the distributor 5, correspondence opens up downwards in each air drain 6 Fluid hole 7；Fluid hole 7 is directly connected to inner tube 1；There are throttling cones 14 on the distributor 5；It is same in throttling cone 14 It is provided with a fluid hole 7.

Wherein the distributor 5 of the supersonic speed denitration spray gun is mounted on the exit of inner tube 1, and rifle neck 8 is mounted on outer tube 4 Exit, rifle cap 12 is then mounted on the exit of rifle neck 8, and spray orifice 15 is then opened on the ontology of rifle cap 12.

Wherein tapered mouth 9, aditus laryngis 10 and flaring mouth 11 are provided with inside the rifle neck 8 of the supersonic speed denitration spray gun.

Wherein several spray orifices 15 are provided on the rifle cap 12 of the supersonic speed denitration spray gun.

The supersonic speed denitration spray gun is fixed on flue gas stream flow area entirely through installation bolt.

Working principle:

Firstly, denitration liquid is imported in inner tube 1 with certain pressure, and compressed air is then imported in outer tube 4 by air inlet 2.

The one of fluid hole 7 of the supersonic speed denitration spray gun is opened in the center of throttling cone 14, is axial hole, should Stream direction and the airflow direction angle out in hole are 45 degree；And remaining fluid hole 7 is then orthogonal with 6 plane perpendicular of air drain, is radial Hole, and quantity is identical as the quantity of air drain 6, denitration liquid most in this way enters air drain 6 by radial fluid hole 7, herein It meets with high-speed compressed air, is tentatively mixed, this portion of combined stream is known as mainstream, is solution-airmixture, enters rifle immediately The tapered mouth 9 of neck 8, tapered mouth 9 are that expansion accelerates to start section, and the denitration liquid of sub-fraction then has axial fluid hole 7 to enter Throttling cone 14 in spray, throttling cone 14 exit interface mixed with the mainstream of high speed, then, mainstream mixed with tributary after still For solution-airmixture, into aditus laryngis 10, expansion accelerates to velocity of sound when reaching aditus laryngis 10, and mixed flow proceeds immediately to rifle neck 8 Flaring mouth 11 simultaneously continues expansion and accelerates, and two phase flow further speeds up development herein, and eventually exceeds velocity of sound, more than after velocity of sound The mixing chamber 13 of rifle cap 12 is inner be stirred strongly after, finally projected by spray orifice 15.

The advantage of doing so is that:

The rifle neck 8 is the tapered-aditus laryngis-flaring expansion structure used, and according to gas stagnation pressure law, gas is swollen Accelerating always during swollen, that is, static pressure is converted into the process of dynamic pressure, gas pressure is slow release, this guarantees Good impact force, and it is constantly in deficient swelling state, it is formed with high-speed flow existing for back pressure, which enters in flue gas When, all small pressure disturbances are that subsonic flow can not pass through, and thus can easily penetrate crossflow, can be noiseless Ground reaches predetermined spatial position, so that denitration liquid is sufficiently distributed in flue cross section, comes into full contact with nitrogen oxides, to denitrification process Play positive effect.

Fluid hole 7 has opened up multiple, and a fluid hole 7 is provided in each slot of air drain 6, meanwhile, in throttling cone 14 Open up a fluid hole 7, directly with 1 connection of denitration liquid inner tube, two phase flow can just have well fluid hole 7 at mixing initial stage Mixing condition, while there is no high pressure requirement to denitration liquid.

Throttling cone 14 can reduce the consumption to compressed air, and reduce the airflow resistance of aditus laryngis 10.

Two phase flow after supersonic atomization early period is mainly come into full contact with again, is sufficiently mixed by the effect of rifle cap 12, After sufficiently developing, the two is sprayed with velocity of sound or supersonic gas stream mode from spray orifice 15 simultaneously, and the air velocity after ejection is more than How much velocity of sound depends on gas source gross pressure, and whether there is or not backpressure requirements.

Especially: the design of the spray orifice 15 on rifle cap 12 is very original, and referring to shown in attached drawing 2, the shooting angle of spray orifice 15 is Space Angle, i.e., neither horizontal, also out of plumb, but form an angle with three faces spatially, one of them special angle Degree be with the X-Y plane angle of cut be 45 ° or the elevation angle, with the X-Z plane angle of cut be 45 ° or rotation angle, take more counterclockwise. Using the spray orifice of this fixed angle, apparent advantage is that its atomizing angle does not change, Er Qieyi with the variation of incoming-flow pressure It can be designed according to the requirement of fluidic spaces with any angle.

Compressed air is utilized with decompression-expansion-acceleration characteristic in the denitration spray gun adopted the structure, and can be with Accelerating to is more than velocity of sound, has played its superior air dynamic behaviour to the utmost, and when being atomized that medium is with pressure to be mixed Between it is long, so that liquid stream is sufficiently gasified, the two is sprayed together with high-voltage high-speed state.

Denitration solution can be crushed to molecular level by the spray gun of such structure, and atomization is considerably beyond existing at present A kind of what denitration spray gun.

When rifle cap 12 damages, rifle neck 8 and distributor 5 still be can work normally, that is, whole rifle still can be normal Work, only spray quality is declined, and improves the reliability of supersonic speed denitration spray gun whole device.

Claims

1. supersonic speed denitration spray gun includes gun body and pipette tips, characterized in that the gun body includes inner tube (1), air inlet (2), gun platform (3), outer tube (4), inner tube (1) with outer tube (4) is concentric is welded on gun platform (3), air inlet (2) is welded in outer tube (4) Side wall；The pipette tips, include rifle neck (8) and rifle cap (12), and rifle neck (8) is mounted on the outlet end of outer tube (4), rifle cap (12) It is mounted on the outlet end of rifle neck (8).

2. supersonic speed denitration spray gun according to claim 1, characterized in that be disposed with distributor in the rifle neck (8) (5), the distributor (5) is mounted on the outlet end of inner tube (1), the distributor (5) if outer edge on be uniformly provided with Dry air drain (6), the interior correspondence of each air drain (6) open up fluid hole (7) downwards, and fluid hole (7) is directly connected to inner tube (1), Also there are throttlings to bore (14) on the distributor (5), is equally provided with a fluid hole (7) in throttling cone (14).

3. supersonic speed denitration spray gun according to claim 1, characterized in that be provided with tapered mouth inside the rifle neck (8) (9), aditus laryngis (10) and flaring mouth (11).

4. supersonic speed denitration spray gun according to claim 1, characterized in that be provided with several sprays on the rifle cap (12) Hole (15), the shooting angle of each spray orifice (15) are Space Angle, i.e., neither horizontal, also out of plumb, but in space Three face shapes form an angle, wherein being the elevation angle with the X-Y plane angle of cut, one of angle Selection is 45 °, flat with X-Z Interfacial angle is rotation angle, and one of angle Selection is 45 °, and direction of rotation takes counterclockwise more.