CN205560740U

CN205560740U - Low NOx asymmetric combustor with venturi

Info

Publication number: CN205560740U
Application number: CN201620218591.4U
Authority: CN
Inventors: 胡伟杰
Original assignee: Changxing Jinnuo Machinery Co Ltd
Current assignee: Changxing Jinnuo Machinery Co Ltd
Priority date: 2016-03-21
Filing date: 2016-03-21
Publication date: 2016-09-07
Anticipated expiration: 2026-03-21

Abstract

The utility model relates to a low NOx asymmetric combustor with venturi, including fuel discharge subassembly, air conduit, burning wall, lighter, venturi, fuel discharge subassembly is including pointed end, fuel riser, the flame stabilization structure of discharging, the air flue that the burning wall surrounded passes the burning wall and extends, flame stabilization structure sets up the first inboard at one side of the axis of burning wall burning wall, flame stabilization structure sets up the discharge port department at the burning wall, venturi sets up at the opposite side second of axis inboardly, venturi's vacuum breathing pipe extends to beyond the exit end of burning wall, still be provided with the stator in the air conduit, stator one end extends to venturi's leading edge, the high temperature leads to the formation of more NOx and insufficient problem of burning in having overcome current combustor heat supply furnace.

Description

A kind of low NOx asymmetric burner with Venturi tube

Technical field

This utility model relates to technical field of burner, particularly relates to a kind of low NOx with Venturi tube non- Symmetrical expression burner.

Background technology

Burner be industrial furnace combustion apparatus mainly comprise parts, its burning produce NOx be to cause ring One of principal element of environment pollution, along with the pay attention to day by day of Environmental protection, the height of NOx generation amount is Become one of important indicator of measurement burner combustion performance.Different with burning condition according to fuel, burned The NOx generated in journey is broadly divided into three kinds, i.e. fuel type NOx, thermal NO x and Quick-type NOx.Gas The NOx generated in fuel combustion process is mainly fuel type NOx and thermal NO x, therefore, for combustion gas Fluid fuel controls NOx and generates and mainly control generating or having generated of thermal NO x and fuel type NOx NOx reduces.Temperature has decisive role to the generation of thermal NO x, and different burners is at combustor The calorific intensity distribution that interior generation is different, different calorific intensity distributions produces different Temperature Distribution, therefore design one Money novel burner makes it can meet the needs of fuel fire and burning to reduce again the generation of NOx and become real The key of existing low NOx drainage, but eccentric asymmetrical burner reduces the generation of NOx there is fuel combustion Insufficient, uneven problem of burning.

Utility model content

One of the purpose of this utility model be for the deficiencies in the prior art in place of, overcome existing burner supply The too high generation causing more NOx of temperature in hot burner hearth, and it is insufficient to burn, uneven problem, it is provided that Plant and fuel combustion can be made abundant, combustion even, temperature can be controlled again and reduce the burner that NOx generates.

A kind of low NOx asymmetric burner with Venturi tube, including fuel discharge assembly, air line, Burner wall, lighter, Venturi tube, described fuel discharge assembly include discharge tip, fuel riser, Flame stabilization structure；The air flue of described burner wall cincture extends through burner wall；Described flame stabilization Structure is arranged on inside the first of the side burner wall of the axis of burner wall；Described flame stabilization structure is arranged At the floss hole of burner wall；Described Venturi tube is arranged on inside the opposite side second of axis；Described literary composition mound In the vacuum suction pipe of pipe extend to beyond the port of export of burner wall；It is additionally provided with in described air line and leads Leaf, stator one end extends to the leading edge of Venturi tube.

Preferred as one, described fuel riser longitudinally cuts across air flue, and one end extends to discharge point End.

Preferred as one, described 15 millimeter of-20 milli of outlet discharging tip preferably more than burner wall Rice.

Preferred as one, described fuel is discharged tip and is discharged point for gaseous fuel discharge tip or liquid fuel End, it is desirable that discharge tip for gaseous fuel.

Preferred as one, described fuel is discharged tip and is discharged most advanced and sophisticated or smooth flame discharge point for circular flame End, it is preferred that circular flame discharges tip.

Preferred as one, described flame stabilization structure is provided with the stable cone of multiple passage, and annular is uniformly Distribution passage can allow air even into.

Preferred as one, described flame stabilization structure has the medial wall of leading edge, leading edge and burner wall Contact.

Preferred as one, a diameter of D of described air flue, the outlet of described flame stabilization structure straight Footpath is d, 40%D ＜ d ＜ 50%D, and this ratio is the optimization numerical value drawn in practice.

Preferred as one, described lighter is arranged on inside the second of burner wall.

Preferred as one, described burner wall is firebrick wall structure.

Preferred as one, the laminating of described Venturi tube is fixed on the medial wall of burner wall.

Preferred as another, the upstream of described stator is provided with baffle plate, for controlling the combustion air of entirety Flow.

The beneficial effects of the utility model:

(1) this utility model provides a kind of low NOx asymmetric burner with Venturi tube, eccentric Asymmetrical setting overcomes the too high generation causing more NOx of temperature in existing burner heat supply burner hearth Problem, effectively can control temperature thus reduce the generation of NOx.

(2) this utility model provides a kind of low NOx asymmetric burner with Venturi tube, literary composition mound In the setting of pipe the effect of burner eccentric setting is become apparent from, the most sufficiently by mixed gas transfer combustion Burn so that burning is fully and combustion distribution is uniform.

(3) this utility model provides a kind of low NOx asymmetric burner with Venturi tube, stator Setting make input Venturi tube air velocity faster, promote the working effect of Venturi tube thus promote The effect that the reduction NOx of eccentric burner generates.

Accompanying drawing explanation

For the technical scheme of clearer explanation this utility model embodiment, institute in embodiment being described below The accompanying drawing used is needed to be briefly described, it should be apparent that, drawings discussed below is only this utility model Some embodiments, from the point of view of those of ordinary skill in the art, on the premise of not paying creative work, Other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the structure sectional view of a kind of low NOx asymmetric burner with Venturi tube.

Fig. 2 is the structure top view of a kind of low NOx asymmetric burner with Venturi tube.

Fig. 3 is that a kind of structure with the low NOx asymmetric burner fuel discharge assembly of Venturi tube is shown It is intended to.

Fig. 4 is the venturi tube structure schematic diagram of a kind of low NOx asymmetric burner with Venturi tube.

Label declaration:

1. fuel discharges assembly, 2. air line, 3. burner wall, 4. lighter, 5. Venturi tube, and 6. air leads to Road, 7. stator, 8. baffle plate, 9.C region, 10.D region, 11. discharge tips, 12. fuel riser, 13. Flame stabilization structure, 21. inwalls, 31. medial walls, 32. ports of export, 33. axis, inside 34. first, 35. Inside second, 51. vacuum suction pipes, 52.a district, 53. air vents, 54. leading edges, 61. air flue a, 62. air flue b, 511. ozzles, 71. ends, 131. passages, 132. leading edges, 133. outlets.

Detailed description of the invention

Below in conjunction with the accompanying drawings the technical scheme in this utility model embodiment is clearly and completely illustrated.

Embodiment one

Fig. 1 is a kind of low NOx asymmetric burner structure sectional view schematic diagram with Venturi tube, figure 2 be a kind of structure top view of low NOx asymmetric burner with Venturi tube, Fig. 3 for one band The low NOx asymmetric burner fuel having Venturi tube discharges the structural representation of assembly, Fig. 4 is one Venturi tube structure schematic diagram with the low NOx asymmetric burner of Venturi tube.As shown in Figure 1, Figure 2, Shown in Fig. 3, Fig. 4, a kind of low NOx asymmetric burner with Venturi tube includes fuel discharge group Part 1, air line 2, burner wall 3, lighter 4, Venturi tube 5, described fuel is discharged assembly 1 and is wrapped Include discharge tip 11, fuel riser 12, flame stabilization structure 13；The air of described burner wall 3 cincture Path 6 extends through burner wall 3；Described flame stabilization structure 13 is arranged on the axis 33 of burner wall 3 Side burner wall 3 first inside 34；Described flame stabilization structure 13 is arranged on going out of burner wall 3 At mouth end 32；Described Venturi tube 5 is arranged on inside the opposite side second of axis 33 35；Described venturi The vacuum suction pipe 51 of pipe 5 extends to beyond the port of export 32 of burner wall 3；In described air line 2 also Being provided with stator 7, stator 7 one end extends to the leading edge 54 of Venturi tube 5；Described fuel riser 12 Longitudinally cutting across air flue 6, one end extends to discharge most advanced and sophisticated 11；Described tip 11 of discharging is less than combustion The port of export 32 (15-25) millimeter of burner wall 3, preferred value is 20 millimeters；Described fuel discharges most advanced and sophisticated 11 Tip is discharged for gaseous fuel；Described fuel is discharged most advanced and sophisticated 11 and is discharged tip for circular flame；Described flame is steady Fixed structure 13 is provided with the stable cone of multiple passage 131, and annular equally distributed passage 131 is permissible Allow air even into；Described flame stabilization structure 13 has leading edge 132, leading edge 132 and burner The medial wall 31 of wall 3 contacts；A diameter of D of described air flue 6, the row of described flame stabilization structure 13 A diameter of d, the 40%D ＜ d ＜ 50%D of outlet 133, this ratio is the optimization numerical value that practice draws；Institute State lighter 4 and be arranged on inside the second of burner wall 3 35；Described burner wall 3 is firebrick wall structure； The laminating of described Venturi tube 5 is fixed on the medial wall 31 of burner wall 3；The upstream of described stator 7 is arranged There is baffle plate 8, for controlling the flow of the combustion air of entirety.

During work, combustion air is in the entrance air line 2 that baffle plate 8 is appropriate, and stator 7 is by air flue 6 are divided into air flue a61 and air flue b62, and the air flowing of air flue b62 is shallower, air Flow through air flue b62 and enter inside the first of burner wall 3 34, then logical through flame stabilization structure 13 Pore 131 is discharged and is discharged, with fuel, the fuel mixed combustion discharged in most advanced and sophisticated 11, and the material of air fires relatively herein The amount of material is few, forms enriched combustion region in C region 9, and the temperature of fuel is relatively low, unnecessary fuel and combustion Burn inert products mixing and reduce temperature；The air of air flue a61 increasingly leans at end 71 because of stator 7 The inwall 21 of near-space feed channel 2 makes flow velocity accelerate, and air enters Venturi tube 5, at a of Venturi tube 5 District 52 forms vacuum, and vacuum suction pipe 51 is extended to C region 9, whole vacuum suction pipe 51 by a district 52 Interior in low-pressure state, the fuel in C region and burning inert products mixed gas are drawn into by vacuum suction pipe 51 It is mixed to form air vent 53 row of new mixed gas flow through venturi 5 with the air entered in Venturi tube 5 Go out and burn in D region 10, owing to the few ignition temperature of fuel ratio will not be high.

The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model It is not limited thereto, the technical scope that any those familiar with the art discloses at this utility model In, the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.Therefore, Protection domain of the present utility model should be as the criterion with the protection domain of claims.

Claims

1. the low NOx asymmetric burner with Venturi tube, discharging assembly (1), air line (2), burner wall (3), lighter (4), Venturi tube (5) including fuel, described fuel is discharged assembly (1) and is included discharging termination (11), fuel riser (12), flame stabilization structure (13)；It is characterized in that: the air flue (6) of described burner wall (3) cincture extends through burner wall (3)；Described flame stabilization structure (13) is arranged on inside the first of the side of the axis (33) of burner wall (3) (34)；Described flame stabilization structure (13) is arranged on the port of export (32) place of burner wall (3)；Described Venturi tube (5) is arranged on inside the opposite side second of axis (33) (35)；The vacuum suction pipe (51) of described Venturi tube (5) extends to beyond the port of export (32) of burner wall (3)；Described air line (2) is additionally provided with stator (7), and stator (7) one end extends to the leading edge (54) of Venturi tube (5).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described fuel riser (12) longitudinally cuts across air flue (6), one end extends to discharge termination (11).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described discharge termination (11) is less than the port of export (32) 15 millimeters-25 millimeters of burner wall (3).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described fuel discharging end head (11) is that tip discharged by gaseous fuel.

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described flame stabilization structure (13) is provided with the stable cone of multiple passage (131).

A kind of low NOx asymmetric burner with Venturi tube, it is characterized in that, described flame stabilization structure (13) has leading edge (132), and leading edge (132) contacts with the medial wall (31) of burner wall (3).

A kind of low NOx asymmetric burner with Venturi tube, it is characterized in that, a diameter of D of described air flue (6), a diameter of d, the 40%D ＜ d ＜ 50%D of the outlet (133) of described flame stabilization structure (13).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described lighter (4) is arranged on inside the second of burner wall (3) (35).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that described Venturi tube (5) laminating is fixed on the medial wall (31) of burner wall (3).

A kind of low NOx asymmetric burner with Venturi tube, it is characterised in that the upstream of described stator (7) is provided with baffle plate (8), for controlling the flow of the combustion air of entirety.