CN207815316U

CN207815316U - It is a kind of can homogenous combustion low nitrogen burner

Info

Publication number: CN207815316U
Application number: CN201721924447.3U
Authority: CN
Inventors: 刘博�; 曾天掌; 王亚军; 郑延庆
Original assignee: Fujian Huaxia Blue Sky Technology Co Ltd
Current assignee: Fujian Huaxia Blue Sky Technology Co Ltd
Priority date: 2017-12-30
Filing date: 2017-12-30
Publication date: 2018-09-04
Anticipated expiration: 2027-12-30

Abstract

The utility model is related to it is a kind of can homogenous combustion low nitrogen burner, including cylinder, natural gas passage mechanism, combustion air passage mechanism from combustion air to cylinder and eddy flow tray for being passed through；The cylinder includes ontology, and one end of the ontology is equipped with aditus laryngis, and the ontology is connected with the wall portion of aditus laryngis；The wall portion of the aditus laryngis opens up circulation port in multiple flue gases；The natural gas passage mechanism includes multiple peripheral conduits, transitional region pipeline and central tube, the transitional region pipeline includes multiple straight tubes being arranged around central tube and the spiral element for being connected with straight tube end and being communicated with straight tube, the straight tube passes through swirl vane, the spiral element is parallel with the eddy flow tray, and the periphery of the spiral element is equipped with multiple circumferential spray-holes.The utility model can reduce the discharge of NOx by the components such as circulation port in flue gas and the natural gas line of classification.

Description

It is a kind of can homogenous combustion low nitrogen burner

Technical field

The utility model is related to burner arts, more particularly to it is a kind of can homogenous combustion low nitrogen burner.

Background technology

NOx is a kind of important component of atmosphere pollution, and one of an important factor for initiation haze and acid rain.Mesh The preceding continuous improvement with environmental requirement, it is also increasingly stringent for the limitation of NOx discharge,

Neat gas burner is can to reduce NOx discharge using natural gas as fuel, thus neat gas burner obtained in recent years To greatly developing.Neat gas burner has many advantages, such as clean and effective, safe and simple.

Specifically, neat gas burner is to reach chemical energy transformation by the way that natural gas and air are carried out mixing and burning For the purpose of thermal energy.It is designed by rational burner structure, natural gas and air can be made to be uniformly mixed, ensureing efficiently combustion On the basis of burning, the generation of local high temperature zone is reduced, to inhibit the generation of NOx in combustion process, reaches the discharge of low NOx Amount.Such as patent CN 105135432A adjust combustion zone fuel and sky using the structure type of inside and outside two layers of fuel gun The distribution of gas reduces the formation of high-temperature area, reduces the discharge capacity of NOx.

The mixing of fuel and air before into combustion zone combustion efficiency is influenced it is very big, however into combustion zone Before, the mixing of natural gas and air that fuel gun sprays is all very limited over time and space, this can cause this region natural The mixed effect of gas and air is deteriorated, and then concentration in combustion zone, temperature distribution is non-uniform, and the production quantity of NOx is made to increase.

Therefore, the NOx emission of neat gas burner is still greatly improved space, also much reduces pollutant emissions Technological means has to be developed.There is still a need for design, more rationally effective ultra-low NOx emission burner structure form effectively drops Low burn is burnt and control pollutant emission.

Invention content

In view of this, the purpose of this utility model be to provide it is a kind of can homogenous combustion low nitrogen burner, be provided with The natural gas line of circulation port and classification in flue gas, the wherein periphery of the spiral element of transitional region pipeline are equipped with multiple circumferential sprays Perforation, and spiral element is parallel with eddy flow tray, so as to natural gas equably be injected above eddy flow tray so that natural gas Homogenous combustion after being mixed with eddy flow combustion air；The flue gas near aditus laryngis can be sucked by circulation port in flue gas in cylinder simultaneously Portion reduces partial combustion temperature, reduces the generation of NOx.

The utility model is realized using following scheme：It is a kind of can homogenous combustion low nitrogen burner, including cylinder, use To spray the natural gas passage mechanism of natural gas to cartridge outlet, for being passed through combustion air to cartridge outlet with mixed with natural gas The combustion air passage mechanism and eddy flow tray of combination burning；

The cylinder includes ontology, and the exit end of the ontology is equipped with aditus laryngis, and the ontology is connected with the wall portion of aditus laryngis； The wall portion of the aditus laryngis opens up circulation port in multiple flue gases,

The eddy flow tray is arranged in the ontology of cylinder and coaxial with the cylinder, the eddy flow tray include eddy flow inner ring, Eddy flow outer shroud and the swirl vane being set between eddy flow inner ring and eddy flow outer shroud；

The natural gas passage mechanism includes multiple peripheral conduits, transitional region pipeline and central tube, multiple peripheral tubes The centerline parallel of road and cylinder is simultaneously disposed around on the inside of the internal perisporium of cylinder, and the front end of the peripheral conduits passes through cylinder, and outer The spray-hole in bustle pipe road is located at the outside of cylinder, and close to aditus laryngis；Central tube is arranged in eddy flow inner ring, during central tube includes The natural air gun of the heart, natural gas gas chamber and central-injection hole, natural gas gas chamber are set to one end of the close aditus laryngis of the natural air gun in center, Central-injection hole is connected to via natural gas gas chamber with the natural air gun in center；The transitional region pipeline includes multiple around central tube Road setting and the straight tube parallel with central tube and the spiral element for being connected with straight tube end and being communicated with straight tube, the straight tube Across swirl vane, in front of parallel with the eddy flow tray and outlet positioned at the eddy flow tray of the spiral element, the spiral The periphery wall of shape pipe is equipped with multiple circumferential spray-holes sprayed to spiral center；

The combustion air passage mechanism includes center air channel and outer air channel, and the center air is logical Region centered on road between pipeline and transitional region pipeline, the outer air channel are peripheral conduits and transitional region pipeline Between region；

Wherein, the natural gas that the combustion air from center air channel is sprayed with central-injection hole is mixed to form center Combustion zone；Part combustion air from outer air channel is mixed with the natural gas that the spray-hole of transitional region pipeline sprays Form transition combustion zone；The day that the spray-hole of another part combustion air and peripheral conduits from outer air channel sprays Right gas is mixed to form peripheral combustion zone；Partial fume after burning can enter inner barrel via circulation port in flue gas.

In the operational process of low nitrogen burner, the effect shape of eddy flow tray is passed through into the part combustion air of cylinder At strong rotational flow gas stable central burner region is formed with the natural gas mixing that central-injection hole sprays；Outermost periphery The natural gas jet stream that the spray-hole of pipeline sprays is uniformly distributed in radial directions, and is mixed with a part of combustion air, is formed Peripheral combustion zone enters the day of the part combustion air in outer air channel and the spray-hole ejection of transitional region pipeline in addition Right gas phase mutually blends, and forms intermediate transition combustion zone.Thus therefore, entire combustion zone is divided into the center of fuel-rich combustion Combustion zone, the transition combustion zone of fuel-lean combustion and peripheral combustion zone three parts.Inhibit NOx by the fuel-rich of part Generation；Transition combustion zone and peripheral combustion zone are poor fuel pre-mixed gas, and ignition temperature is low, equally plays reduction The effect of NOx emission.

Further, the natural gas passage mechanism further includes multiple L-shaped branch pipes, and the L-shaped branch pipe includes being mutually perpendicular to The centerline parallel of the tube axial and radial tubes of connection, tube axial and cylinder is simultaneously disposed around on the inside of the internal perisporium of cylinder, radial tubes Inner barrel is stretched into via circulation port in flue gas, and the projection in an axial direction of radial tubes is at least partially disposed at the projection model of eddy flow tray In enclosing, one end for stretching into inner barrel of radial tubes has radial injection hole, stretches into the periphery of the radial tubes of cylinder equipped with multiple Circumferential spray-hole.

Combustion air is divided into two-stage by the utility model by natural gas passage mechanism and combustion air passage mechanism, naturally Qi leel is three-level.Natural gas can be injected into center by central tube, while the radial injection hole of L-shaped branch pipe also can will be natural Gas is injected above eddy flow tray, and the periphery of the spiral element of transitional region pipeline is equipped with multiple circumferential spray-holes, and spiral element Parallel with the eddy flow tray, so as to equably inject natural gas above eddy flow tray, three strands of natural gases are the same as the combustion-supporting sky of eddy flow Gas mixes, while increasing the air-flow velocity of inner barrel so that the flue gas near aditus laryngis can be inhaled by circulation port in flue gas Enter inner barrel, reduces partial combustion temperature, reduce the generation of NOx.Outer layer fuel is emitted directly toward outer layer combustion air, ensures combustion Burner exit velocity is reasonably distributed, the blending of fuel gas and combustion air is uniform, combustion zone is rationally controlled, to ensure to burn Stability and good NOx abatement effect.

Further, drop shadow spread of the projection of the circumferential spray-hole at least one radial tubes in an axial direction positioned at eddy flow tray It is interior, it is mixed to form the center with the natural gas of combustion air and the ejection of central-injection hole from center air channel and fires Burn region；Circumferential spray-hole at least one radial tubes is located at outer air channel, with the portion from outer air channel The natural gas that the spray-hole of combustion air and transitional region pipeline sprays is divided to be mixed to form transition combustion zone.

Further, the L-shaped branch pipe is distributed at equal intervals around cylinder, and identical quantity is equipped between adjacent L-shaped branch pipe Peripheral conduits, the extended lines of the radial tubes of each L-shaped branch pipe passes through the axis of cylinder.

Further, the wall portion of the aditus laryngis is inside contracted compared to ontology towards cylinder.

Further, the cylinder further includes guide plate, and the guide plate is connected to the outer rim of the wall portion of aditus laryngis, and towards cylinder The expansion of the outer inclination of body.

The wall portion extended out so that aditus laryngis is in bell mouth shape, is inhaled towards cylinder curls inward after partial fume discharge, a part is via flue gas Interior circulation port enters the transition combustion zone in cylinder, and a part is directed to peripheral conduits by guide plate, into peripheral combustion zone. Therefore, guide plate can aid in form cycle in flue gas with circulation port cooperation in flue gas, effectively reduce the model of local high temperature zone It encloses, inhibits the generation of NOx.

Further, ranging from 20 ° -45 ° of the angle of inclination of the guide plate.

Further, the number of circulation port is 8-12 in the flue gas, and the number of the peripheral conduits is 16-24.

Further, the angle of the swirl vane is 25 ° -60 °, and the quantity of the swirl vane is 6-12.

Compared with prior art, the utility model has the advantages that：The low nitrogen burner of the utility model Operational process in, the part combustion air into cylinder forms strong rotational flow gas, same central-injection by the effect of eddy flow tray The natural gas mixing that hole sprays, forms stable central burner region；The spray-hole of outermost peripheral conduits sprays natural Gas jet stream is uniformly distributed in radial directions, and is mixed with a part of combustion air, and peripheral combustion zone is formed, and is entered in addition outer The natural gas that the part combustion air of layer air duct is sprayed with the spray-hole of transitional region pipeline mutually blends, and forms centre Transition combustion zone.Thus therefore, entire combustion zone be divided into the central burner region of fuel-rich combustion, fuel-lean combustion mistake Cross combustion zone and peripheral combustion zone three parts.Inhibit the generation of NOx by the fuel-rich of part；Transition combustion zone and outer It is poor fuel pre-mixed gas to enclose combustion zone, and ignition temperature is low, equally plays the effect for reducing NOx emission.

Description of the drawings

Fig. 1 is the three-dimensional cutaway view of the low nitrogen burner of the utility model.

Fig. 2 is the schematic top plan view of the low nitrogen burner of the utility model.

In figure, 1 is cylinder 1, and 1-1 is ontology, and 1-2 is aditus laryngis, and 1-3 is guide plate, and 2 be combustion air passage mechanism, 2-1 For center air channel, 2-2 is outer air channel, and 3 be natural gas passage mechanism, and pipeline centered on 3-1,3-2 is periphery Pipeline, 3-3 are L-shaped branch pipe, and 3-4 is transitional region pipeline, natural air gun centered on 3-1-1, and 3-1-2 is natural gas gas chamber, 3- Spray-hole centered on 1-3,3-3-1 are tube axial, and 3-3-2 is radial tubes, and 3-4-1 is straight tube, and 3-4-2 is spiral element, and 4 be rotation Flow table, 4-1 are eddy flow inner ring, and 4-2 is eddy flow outer shroud, and 4-3 is swirl vane, and 5 be circulation port in flue gas.

Specific implementation mode

The utility model is described further with reference to the accompanying drawings and embodiments.

As depicted in figs. 1 and 2, present embodiments provide it is a kind of can homogenous combustion low nitrogen burner, including cylinder 1, to cartridge outlet spray natural gas natural gas passage mechanism 3, for cylinder 1 outlet be passed through combustion air with day The combustion air passage mechanism 2 and eddy flow tray 4 that right gas is mixed and burned；

The cylinder 1 includes that the exit end of ontology 1-1, the ontology 1-1 are equipped with aditus laryngis 1-2, the ontology 1-1 and larynx The wall portion of mouth 1-2 is connected；The wall portion of the aditus laryngis 1-2 opens up circulation port 5 in multiple flue gases,

The eddy flow tray 4 is arranged in the ontology 1-1 of cylinder 1 and coaxial with the cylinder 1, and the eddy flow tray 4 includes rotation Flow inner ring 4-1, eddy flow outer shroud 4-2 and the swirl vane 4-3 being set between eddy flow inner ring 4-1 and eddy flow outer shroud 4-2；

The natural gas passage mechanism 3 includes multiple peripheral conduits 3-2, transitional region pipeline 3-4 and central tube 3-1, The centerline parallel of multiple peripheral conduits 3-2 and cylinder is simultaneously disposed around on the inside of the internal perisporium of cylinder, the front end of the peripheral conduits Across cylinder, and the spray-hole of peripheral conduits 3-2 is located at the outside of cylinder 1, and close to aditus laryngis 1-2；Central tube 3-1 is arranged in Eddy flow inner ring 4-1, central tube 3-1 include the natural air gun 3-1-1 in center, natural gas gas chamber and central-injection hole 3-1-3, naturally Gas gas chamber is set on one end of the close aditus laryngis 1-2 of the natural air gun 3-1-1 in center, and central-injection hole 3-1-3 is via natural gas gas chamber 3-1-2 is connected to the natural air gun 3-1-1 in center；The transitional region pipeline 3-4 includes that multiple central tube 3-1 that surround are arranged simultaneously The straight tube 3-4-1 parallel with the central tube and spiral element 3- for being connected with the ends straight tube 3-4-1 and being communicated with straight tube 3-4-1 4-2, the straight tube 3-4-1 pass through swirl vane 4-3, the spiral element 3-4-2 parallel with the eddy flow tray 4 and positioned at described In front of the outlet of eddy flow tray, the periphery wall of the spiral element 3-4-2 is equipped with multiple circumferential spray-holes sprayed to spiral center；

The combustion air passage mechanism 2 includes center air channel 2-1 and outer air channel 2-2, the centre Region centered on layer air duct 2-1 between pipeline 3-1 and transitional region pipeline 3-4, the outer air channel 2-2 is outer Region between bustle pipe road 3-2 and transitional region pipeline 3-4；

Wherein, the combustion air from center air channel 2-1 is mixed with the central-injection hole 3-1-3 natural gases sprayed Form central burner region；Part combustion air and the spray-hole of transitional region pipeline 3-4 from outer air channel 2-2 spray The natural gas gone out is mixed to form transition combustion zone；Another part combustion air from outer air channel 2-2 and peripheral tube The natural gas that the spray-hole of road 3-2 sprays is mixed to form peripheral combustion zone；Partial fume after burning can be via in flue gas Circulation port 5 enters inside cylinder 1.

In the present embodiment, the natural gas passage mechanism 3 further includes multiple L-shaped branch pipe 3-3, the L-shaped branch pipe 3-3 packets Include the tube axial 3-3-1 being mutually connected vertically and radial tubes 3-3-2, the centerline parallel of tube axial 3-3-1 and cylinder and enclosing is set On the inside of the internal perisporium of cylinder, radial tubes 3-3-2 is stretched into via circulation port in flue gas 5 inside cylinder 1, and radial tubes 3-3-2 Projection in an axial direction is at least partially disposed in the drop shadow spread of eddy flow tray 4, the one end of radial tubes 3-3-2 stretched into inside cylinder 1 With radial injection hole, the periphery for stretching into the radial tubes 3-3-2 of cylinder 1 is equipped with multiple circumferential spray-holes.

In the present embodiment, the projection of the circumferential spray-hole at least one radial tubes 3-3-2 in an axial direction is located at eddy flow tray 4 Drop shadow spread in, with from center air channel 2-1 combustion air and central-injection hole 3-1-3 spray natural gas It is mixed to form the central burner region；Circumferential spray-hole at least one radial tubes 3-3-2 is located at outer air channel 2- 2, the natural gas sprayed with the spray-hole of part combustion air and transitional region pipeline 3-4 from outer air channel 2-2 It is mixed to form transition combustion zone.

In the present embodiment, the L-shaped branch pipe 3-3 is distributed at equal intervals around cylinder 1, is set between adjacent L-shaped branch pipe 3-3 There are the extended line of the peripheral conduits 3-2, the radial tubes 3-3-2 of each L-shaped branch pipe 3-3 of identical quantity to pass through the axis of cylinder 1.

In the present embodiment, the wall portion of the aditus laryngis 1-2 is inside contracted compared to ontology 1-1 towards cylinder 1.

In the present embodiment, the cylinder 1 further includes guide plate 1-3, and the guide plate 1-3 is connected to the wall of aditus laryngis 1-2 The outer rim in portion, and the expansion of the outer inclination towards cylinder 1.

In the present embodiment, ranging from 20 ° -45 ° of the angle of inclination of the guide plate 1-3.

In the present embodiment, the number of circulation port 5 is 8-12 in the flue gas, and the number of the peripheral conduits 3-2 is 16-24.

In the present embodiment, the angle of the swirl vane 4-3 is 25 ° -60 °, and the quantity of the swirl vane 4-3 is 6- 12.

It is noted that the utility model protection is hardware configuration, it is not claimed as control method.Above only For a preferable embodiment in the utility model embodiment.But the utility model is not limited to the embodiment above, it is all Any equivalent change done by the utility model and modification, range of the generated function without departing from this programme When, belong to the scope of protection of the utility model.

Claims

1. it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：Including

Cylinder (1), the natural gas passage mechanism (3) to spray natural gas to cartridge outlet are passed through for being exported to cylinder (1) Combustion air passage mechanism (2) and eddy flow tray (4) of the combustion air to be mixed and burned with natural gas；

The cylinder (1) includes ontology (1-1), and the exit end of the ontology (1-1) is equipped with aditus laryngis (1-2), the ontology (1- 1) it is connected with the wall portion of aditus laryngis (1-2)；The wall portion of the aditus laryngis (1-2) opens up circulation port (5) in multiple flue gases,

The eddy flow tray (4) setting in the ontology (1-1) of cylinder (1) and with the cylinder (1) coaxially, the eddy flow tray (4) Including eddy flow inner ring (4-1), eddy flow outer shroud (4-2) and the rotation being set between eddy flow inner ring (4-1) and eddy flow outer shroud (4-2) Flow blade (4-3)；

The natural gas passage mechanism (3) includes multiple peripheral conduits (3-2), transitional region pipeline (3-4) and central tube (3- 1) it, the centerline parallel of multiple peripheral conduits (3-2) and cylinder and is disposed around on the inside of the internal perisporium of cylinder, the peripheral conduits Front end passes through cylinder, and the spray-hole of peripheral conduits (3-2) is located at the outside of cylinder (1), and close to aditus laryngis (1-2)；Central tube Road (3-1) is arranged in eddy flow inner ring (4-1), central tube (3-1) include the natural air gun in center (3-1-1), natural gas gas chamber and Central-injection hole (3-1-3), natural gas gas chamber are set to one end of the close aditus laryngis (1-2) of the natural air gun in center (3-1-1), center Spray-hole (3-1-3) is connected to via natural gas gas chamber (3-1-2) with center natural air gun (3-1-1)；The transitional region pipeline (3-4) include it is multiple around central tube (3-1) setting and the straight tube (3-4-1) parallel with central tube and with straight tube (3- 4-1) the spiral element (3-4-2) that end is connected and is communicated with straight tube (3-4-1), the straight tube (3-4-1) pass through swirl vane (4-3), parallel with the eddy flow tray (4) and the outlet front positioned at the eddy flow tray of the spiral element (3-4-2), the spiral shell The periphery wall for revolving shape pipe (3-4-2) is equipped with multiple circumferential spray-holes sprayed to spiral center；

The combustion air passage mechanism (2) includes center air channel (2-1) and outer air channel (2-2), in described Region centered on interbed air duct (2-1) between pipeline (3-1) and transitional region pipeline (3-4), the outer air are logical Region of the road (2-2) between peripheral conduits (3-2) and transitional region pipeline (3-4)；

Wherein, the combustion air for coming from center air channel (2-1) is mixed with central-injection hole (3-1-3) natural gas sprayed Form central burner region；The injection of part combustion air and transitional region pipeline (3-4) from outer air channel (2-2) The natural gas that hole sprays is mixed to form transition combustion zone；Another part combustion air from outer air channel (2-2) with The natural gas that the spray-hole of peripheral conduits (3-2) sprays is mixed to form peripheral combustion zone.

2. it is according to claim 1 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The natural gas Passage mechanism (3) further includes multiple L-shaped branch pipes (3-3), and the L-shaped branch pipe (3-3) includes the tube axial (3- being mutually connected vertically 3-1) and radial tubes (3-3-2), it the centerline parallel of tube axial (3-3-1) and cylinder and is disposed around on the inside of the internal perisporium of cylinder, Radial tubes (3-3-2) stretch into cylinder (1) inside, and the projection in an axial direction of radial tubes (3-3-2) via circulation port in flue gas (5) It is at least partially disposed in the drop shadow spread of eddy flow tray (4), internal one end of cylinder (1) of stretching into of radial tubes (3-3-2) has diameter To spray-hole, the periphery for stretching into the radial tubes (3-3-2) of cylinder (1) is equipped with multiple circumferential spray-holes.

3. it is according to claim 2 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：At least one diameter The projection of circumferential spray-hole in an axial direction on pipe (3-3-2) is located in the drop shadow spread of eddy flow tray (4), and from middle layer The natural gas that the combustion air and central-injection hole (3-1-3) of air duct (2-1) spray is mixed to form the central combustion zone Domain；Circumferential spray-hole at least one radial tubes (3-3-2) is located at outer air channel (2-2), and from outer air The natural gas that the part combustion air in channel (2-2) and the spray-hole of transitional region pipeline (3-4) spray is mixed to form transition combustion Burn region.

4. it is according to claim 2 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The L-shaped branch It manages (3-3) to be distributed at equal intervals around cylinder (1), the peripheral conduits (3- of identical quantity is equipped between adjacent L-shaped branch pipe (3-3) 2), the extended line of the radial tubes (3-3-2) of each L-shaped branch pipe (3-3) passes through the axis of cylinder (1).

5. it is according to claim 1 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The aditus laryngis The wall portion of (1-2) is inside contracted compared to ontology (1-1) towards cylinder (1).

6. it is according to claim 1 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The cylinder (1) further include guide plate (1-3), the guide plate (1-3) is connected to the outer rim of the wall portion of aditus laryngis (1-2), and towards cylinder (1) The expansion of outer inclination.

7. it is according to claim 6 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The guide plate Ranging from 20 ° -45 ° of the angle of inclination of (1-3).

8. it is according to claim 1 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：In the flue gas The number of circulation port (5) is 8-12, and the number of the peripheral conduits (3-2) is 16-24.

9. it is according to claim 1 it is a kind of can homogenous combustion low nitrogen burner, it is characterised in that：The eddy flow leaf The angle of piece (4-3) is 25 ° -60 °, and the quantity of the swirl vane (4-3) is 6-12.