阅读说明：本技术 一种双燃料燃烧器喷头 (Double-fuel burner nozzle ) 是由 许立锟 王咏梅 杨小东 张梦伟 邵伟良 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种双燃料燃烧器喷头,包括至少一燃气通道、至少一燃油通道,燃气通道上设有内燃烧管和外燃烧管,内燃烧管、外燃烧管均与燃气通道连接,燃油通道上设有喷油口,喷油口与内燃烧管、外燃烧管设在同一侧。本发明通过将燃烧分级、烟气回流等方式使得燃料与空气充分燃烧,从而降低NO-x排放。(The invention discloses a dual-fuel burner nozzle which comprises at least one fuel gas channel and at least one fuel oil channel, wherein an inner combustion pipe and an outer combustion pipe are arranged on the fuel gas channel, the inner combustion pipe and the outer combustion pipe are both connected with the fuel gas channel, an oil injection port is arranged on the fuel oil channel, and the oil injection port, the inner combustion pipe and the outer combustion pipe are arranged on the same side. The invention makes the fuel and the air fully burn by the modes of combustion classification, flue gas backflow and the like, thereby reducing NO x And (5) discharging.)

1. A dual fuel burner nozzle, characterized by: the fuel oil burner comprises at least one fuel gas channel (3) and at least one fuel oil channel (4), wherein an outer combustion pipe (6) and an outer combustion pipe (5) are arranged on the fuel gas channel (3), the outer combustion pipe (6) and the outer combustion pipe (5) are connected with the fuel gas channel (3), a fuel injection port is arranged on the fuel oil channel (4), and the fuel injection port, the outer combustion pipe (6) and the outer combustion pipe (5) are arranged on the same side.

2. The dual fuel burner nozzle of claim 1, wherein: the fuel gas burner comprises an inner pipe (2) and an outer pipe (1), wherein the inner pipe (2) and the outer pipe (1) are concentrically arranged to form an outer channel and a central channel, the outer channel and the central channel are not communicated with each other, a fuel gas channel (3) is the outer channel, and a fuel oil channel (4) is the central channel.

3. The dual fuel burner nozzle of claim 2, wherein: the inner pipe (2) and the outer pipe (1) are provided with upper positioning plates (7), the outer combustion pipe (6) is arranged on the upper positioning plates (7), and the upper positioning plates (7) are provided with third holes (8) for the fuel oil channels (4) to penetrate through.

4. The dual fuel burner nozzle of claim 3, wherein: still including stablizing flame dish (9), stablize and be fixed through gim peg (10) between flame dish (9) and last locating plate (7), be equipped with a plurality of on stablizing flame dish (9) and be used for connecting first hole (11) that correspond outer burner tube (6), one be used for with second hole (12) of fuel passageway (4) intercommunication, second hole (12) and third hole (8) center alignment.

5. The dual fuel burner nozzle of claim 4, wherein: the outer tube (1) is provided with a plurality of outer combustion tubes (5), the outer sides of the flame stabilizing discs (9) are surrounded by the plurality of outer combustion tubes (5), and the pipe orifices (13) of the outer combustion tubes are higher than the flame stabilizing discs (9).

6. The dual fuel burner nozzle of claim 1 or 2 or 3 or 4, wherein: the mouth (13) of the outer combustion tube is in a double-U shape which is arranged up and down.

7. The dual fuel burner nozzle of claim 7, wherein: the outer side of the outer combustion pipe (5) is provided with a sleeve (14), and the combustion side of the nozzle (13) of the outer combustion pipe faces the sleeve (14).

8. The dual fuel burner nozzle of claim 8, wherein: a flow blocking ring (15) is arranged on the flame stabilizing disc (9).

9. The dual fuel burner nozzle of claim 9, wherein: the flow baffle ring (15) comprises a plurality of flow baffle plates (16), and the flow baffle plates (16) are obliquely arranged on the flame stabilizing disc (9).

10. The dual fuel burner nozzle of claim 2 or 3 or 4 or 5 or 7 or 8 or 9, wherein: an igniter (17) is arranged on the outer pipe (1), an ignition pipe is arranged on the igniter (17), and the ignition pipe is arranged on one side of the outer combustion pipe (6) or the outer combustion pipe (5).

Technical Field

The invention relates to the technical field of energy-saving and environment-friendly combustion equipment, in particular to a nozzle of a dual-fuel combustor.

Background

In the present burners, there are mainly single fuel burners, and there are also a small number of dual fuel burners. While current dual fuel burners burn fuel in one state (e.g., liquid) for a period of time and in another state (E.g., gaseous) fuel, and is not capable of combusting two different states of fuel simultaneously, particularly one liquid fuel and one gaseous fuel simultaneously. Patent application No. CN201520292575.5 discloses a burner nozzle and a burner with the burner nozzle, wherein the burner nozzle can realize the simultaneous combustion of two fuels, but the NO of the device_xThe emission is still high and cannot reach the existing emission standard.

The current market urgently needs a double-fuel burner nozzle capable of reducing NO_xThe requirement of emission, thus the standard meets the requirement, and the energy-saving and environment-friendly effects are achieved.

Disclosure of Invention

The invention aims to solve the technical problems and provides a nozzle of a dual-fuel burner, which enables fuel and air to be fully combusted in a mode of combustion classification and flue gas backflow so as to reduce NO_xAnd (5) discharging.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a two fuel combustor shower nozzles, includes an at least gas channel, an at least fuel oil passageway, is equipped with interior burning pipe and outer burning pipe on the gas channel, and interior burning pipe, outer burning pipe all are connected with the gas channel, are equipped with the nozzle on the fuel oil passageway, and the nozzle is established in same one side with interior burning pipe, outer burning pipe. NO produced by combustion process_xType formation mechanism: the nitrogen oxides formed during combustion are mainly NO and NO₂Both of which are commonly referred to collectively as NO_x. Of the nitrogen oxide products produced by the combustion of natural gas, 90% are NO, NO₂Only about 10 percent. According to the research, NO generated by combustion_xThere are three main types: 1) temperature type NO_x: mainly formed by oxidizing nitrogen in air at high temperature in the combustion process; 2) transient NO_xThe specific gravity is very small: when the excess air ratio is 0.7-0.8, this NO is generated in the premixed combustion_xBut instantaneous NO_xMainly under low-temperature combustion conditions, and at temperatures above 1400 ℃, in the form of temperature NO_xGenerating as a master; 3) fuel type NO_x: the fuel itself containing nitrogen compounds, in the combustion thereofPost-generated NO_x。2、NO_xThe generated influencing factors are as follows: influencing NO_xThe main factors generated include the following aspects: 1. excess air factor; 2. combustion air temperature; 3. combustion chamber hearth temperature; 4. h content in the fuel; 5. the N content of the fuel. Through the setting of interior burning pipe and outer burning pipe, can be so that the burning is hierarchical, and then the burning can be more abundant to reduce NO_xAnd (4) discharging. The same side means that the side is on the top of the burner nozzle.

Preferably, the fuel gas burner comprises an inner pipe and an outer pipe, wherein the inner pipe and the outer pipe are concentrically arranged to form an outer channel and a central channel, the outer channel is not communicated with the central channel, the fuel gas channel is the outer channel, and the fuel oil channel is the central channel. Through the setting of concentric shaft, saved the design space of combustor shower nozzle for combustor shower nozzle structure is simpler, and each other UNICOM can prevent effectively that gas and fuel from burning or exploding in the passageway.

Preferably, the inner pipe and the outer pipe are provided with upper positioning plates, the inner combustion pipe is arranged on the upper positioning plates, and the upper positioning plates are provided with third holes for the fuel oil channels to penetrate through. Through the setting of locating plate for it is more stable that interior burning pipe places.

Preferably, the flame stabilizing device further comprises a flame stabilizing disc, the flame stabilizing disc and the upper positioning plate are fixed through fixing bolts, a plurality of first holes used for being connected with corresponding inner combustion pipes and a plurality of second holes used for being communicated with a fuel oil channel are formed in the flame stabilizing disc, and the centers of the second holes are aligned to the centers of the third holes.

Preferably, the outer pipe is provided with a plurality of outer combustion pipes, the outer combustion pipes surround the outer side of the flame stabilizing disc, and the pipe orifices of the outer combustion pipes are higher than the flame stabilizing disc. The nozzle of the outer combustion tube is higher than the flame stabilizing disc, so that secondary combustion can be formed, and NO can be combusted more fully.

Preferably, the mouth of the outer combustion pipe is in a double-U shape arranged up and down. Through the arrangement of the double U-shaped structure, the gas flows back after being sprayed out and contacting the upper U-shaped structure, and then is combusted again, so that NO is reduced_xAnd (4) discharging.

Preferably, a sleeve is provided outside the outer combustion pipe, and the mouth combustion side of the outer combustion pipe faces the sleeve. Through the setting of telescopic, can further gather together air and gas for air and gas mixed combustion are more abundant.

Preferably, the outer pipe is provided with an igniter, the igniter is provided with an igniter pipe, and the igniter pipe is arranged on one side of the inner combustion pipe or the outer combustion pipe. Through the arrangement of the igniter, the air and the gas can be ignited, so that the air and the gas are combusted.

Preferably, the flow blocking ring is arranged on the flame stabilizing disc and comprises a plurality of flow blocking plates, the flow blocking plates are obliquely arranged on the flame stabilizing disc, and an included angle of 20-60 degrees is formed between each flow blocking plate and the plane of the flame stabilizing disc. Through the inclined arrangement of the flow baffle plates, after the plurality of flow baffle plates form a circular ring, the included angle of 20-60 degrees can cut the air of the inlet amount and enable the air to rotate above the flame stabilizing disc, so that the air and the gas are fully mixed, and the gas on the inner combustion tube is more fully combusted when combusted.

The invention has the beneficial effects that:

1. the invention makes the fuel and the air fully burn by the modes of combustion classification, flue gas backflow and the like, thereby reducing NO_xDischarging;

2. the invention enables the fuel gas to flow back after being sprayed out and contacting with the upper U shape through the arrangement of the double U shapes, and then the fuel gas is combusted again, thereby reducing NO_xDischarging of (3); through the arrangement of the sleeve, air and fuel gas can be gathered further, so that the air and the fuel gas are mixed and combusted more fully;

3. when gas and liquid fuel are combusted simultaneously, the fuel is uniformly mixed and fully combusted, and the plurality of outer combustion pipes and the plurality of inner combustion pipes are arranged to form the oil inlet amount adjusting plate of the oxygen-enriched area, so that air and gas are fully mixed and combusted, and NO is further controlled_xAnd (4) discharging.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural diagram of the flame stabilizing disc of the present invention.

Fig. 3 is a front view of fig. 1.

Fig. 4 is a cross-sectional view taken along a-a of fig. 3.

Fig. 5 is a schematic structural view of the upper positioning plate.

Figure 6 is a schematic view of another arrangement provided with a sleeve.

In the figure: 1. outer tube, 2, inner tube, 3, gas channel, 4, fuel oil channel, 5, outer combustion tube, 6, inner combustion tube, 7, upper locating plate, 8, third hole, 9, flame stabilizing disc, 10, fixing bolt, 11, first hole, 12, second hole, 13, outer combustion tube orifice, 14, sleeve, 15, flow blocking ring, 16, flow blocking plate, 17, igniter

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Example 1

As shown in fig. 1-6, the dual-fuel burner nozzle of the present invention includes at least one fuel gas channel 3, at least one fuel oil channel 4, and an igniter 17, wherein the fuel gas channel 3 is provided with an outer combustion pipe 6 and an outer combustion pipe 5, the outer combustion pipe 6 and the outer combustion pipe 5 are both connected to the fuel gas channel 3, the fuel oil channel 4 is provided with a fuel injection port, the fuel injection port is provided at the same side as the outer combustion pipe 6 and the outer combustion pipe 5, the igniter 17 is provided with an igniter (not shown), and the igniter is provided at one side of the inner combustion pipe 6 or the outer combustion pipe 5. An oil atomizer is arranged in the fuel oil channel 4, so that oil flow is dispersed and oil mist is uniformly distributed in the air flow in a controllable mode.

The fuel gas burner comprises an inner pipe 2 and an outer pipe 1, wherein the inner pipe 2 and the outer pipe 1 are concentrically arranged to form an outer channel and a central channel, the outer channel and the central channel are not communicated with each other, a fuel gas channel 3 is the outer channel, and a fuel oil channel 4 is the central channel.

The inner pipe 2 and the outer pipe 1 are provided with an upper positioning plate 7, the outer combustion pipe 6 is arranged on the upper positioning plate 7, and the upper positioning plate 7 is provided with a third hole 8 for the fuel oil channel 4 to penetrate through.

The flame stabilizing device is characterized by further comprising a flame stabilizing disc 9, the flame stabilizing disc 9 and the upper positioning plate 7 are fixed through fixing bolts 10, a plurality of first holes 11 used for being connected with corresponding outer combustion pipes 6 and a plurality of second holes 12 used for being communicated with a fuel oil channel 4 are formed in the flame stabilizing disc 9, and the centers of the second holes 12 and the third holes 8 are aligned.

The outer tube 1 is provided with a plurality of outer combustion tubes 5, the outer combustion tubes 5 surround the outer side of the flame stabilizing plate 9, and the pipe orifices 13 of the outer combustion tubes are higher than the flame stabilizing plate 9.

The outer combustion pipe orifice 13 is in a double-U shape arranged up and down.

The outer side of the outer combustion pipe 5 is provided with a sleeve 14, and the combustion side of the nozzle 13 of the outer combustion pipe faces the sleeve 14.

The flame stabilizing disc 9 is provided with a flow blocking ring 15. The baffle ring 15 comprises a plurality of baffle plates 16, and the baffle plates 16 are obliquely arranged on the flame stabilizing disc 9.

The outer pipe 1 is provided with an igniter 17, the igniter 17 is provided with an ignition pipe, and the ignition pipe is arranged at one side of the outer combustion pipe 6 or the outer combustion pipe 5.

Example 2

As shown in fig. 6, the present invention is different from embodiment 1 in that: the outer side of the outer combustion pipe 5 is provided with a sleeve 14, and the combustion side of the nozzle 13 of the outer combustion pipe faces the sleeve 14.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.