CN2246751Y

CN2246751Y - Atmospheric burner

Info

Publication number: CN2246751Y
Application number: CN 95218056
Authority: CN
Inventors: 赵文富; 赵德义; 罗洪志; 于立新
Original assignee: GAS THERMODYNAMIC DESIGN INST OF CHANGCHUN CITY
Current assignee: GAS THERMODYNAMIC DESIGN INST OF CHANGCHUN CITY
Priority date: 1995-07-27
Filing date: 1995-07-27
Publication date: 1997-02-05
Anticipated expiration: 2005-07-27

Abstract

The utility model relates to a two-stage injection atmospheric burner, belonging to the technical field of a combustion apparatus. The utility model is composed of a spraying nozzle, a casing tube with a first-stage air inlet and a secondary air inlet, a two-stage injector and a head with a large burning hole. The spraying nozzle, a first-stage injector and a secondary injector are orderly in the casing tube along the flowing direction of fuel gas. The first-stage air inlet is positioned between an outlet of the spraying nozzle and the first-stage injector, and the secondary air inlet is positioned between an outlet of the first-stage injector and an inlet of the secondary injector. One end of the spraying nozzle provided with the casing tube is connected with an air supply pipeline, and the other end of the spraying nozzle is connected with the head. The burner has the advantages of good mixing effect of the fuel gas and the air, high burning temperature, stable flame, and no fire blow-off phenomenon. The utility model is can be used for civil use and catering industries.

Description

Two-stage injection atmospheric burner

The utility model belongs to the burner technical field.

At present in civilian and public catering trade, though the more natural air inducing diffusion flame burner of one-level injection atmospheric burner has many good qualities, but its primary air ratio has only 0.45～0.75, so thermal intensity of fire port, ignition temperature still are restricted, can not satisfy some technological requirement.

The purpose of this utility model is to provide a kind of two-stage injection atmospheric burner, to overcome the deficiency of said burner.

The utility model is achieved in that two-stage injection atmospheric burner comprises the nozzle 2 in forming, also comprise two-stage injector 3,4, band main air inlet 6, the head 5 in the sleeve pipe 1 of secondary air inlet 7 and band large-scale combustion hole 8, nozzle, one-level injector, secondary injector along gas-flow to placing successively in the sleeve pipe, the main air inlet is between jet expansion and one-level injector, the secondary air inlet is between outlet of one-level injector and secondary injector inlet, sleeve pipe is equipped with nozzle one end and connects gas source pipe, and the other end connects head.

Because the utility model has adopted the two-stage injector, and the two-stage air intake is arranged on sleeve pipe, improved the soakage of air, made primary air ratio can reach 0.65～0.9, combustion gas is fully mixed with air process in the two-stage injector, improved mixed effect, make the flame temperature height, sufficient combustion, efficiency of combustion height, carbon monoxide content is few, and carbon monoxide content is less than 0.06% after tested; Because head is provided with big fire hole and tangential swirl formula stable flame hole, make that flame is long, firepower is strong, and flame stabilization, do not have and take off fire, tempering and yellow flame phenomenon, and the pressure adaptation to combustion gas is strong, and comparable other atmospheric burner exceeds the 400mm water column to the adaptability of gaseous-pressure.Because the pore of nozzle is adjustable, or change the nozzle in different apertures, applicable coal gas, multiple combustion gas such as natural gas.

Describe the utility model in detail below in conjunction with accompanying drawing and embodiment.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the utility model part-structure schematic diagram except that head.

Fig. 3 is the structural representation of a kind of head of the utility model.

Fig. 4 is the structural representation of another head of the utility model.

Fig. 5 is a cell burner head construction schematic diagram.

The following describes embodiment:

By sleeve pipe, the two-stage injector of nozzle, band two-stage air intake and the two-stage injection atmospheric burner of being with large-scale combustion hole head to form, nozzle, one-level injector, secondary injector along gas-flow to placing successively in the sleeve pipe, the main air inlet is between jet expansion and one-level injector, the secondary air inlet is between outlet of one-level injector and secondary injector inlet, sleeve pipe peace nozzle one end connects gas source pipe, and the other end connects head.

Combustion gas enters nozzle with certain pressure, in order to adapt to different sources of the gas, the air admission hole of nozzle can be adjusted size, also can make the removable nozzle in different apertures, behind nozzle, pressure reduces, flow velocity raises, and high-speed fuel gas is by momentum-exchange, and the part primary air enters the one-level injector through the main air inlet, combustion gas is with after air mixes in the one-level injector, spray into the secondary injector, suck the part primary air once more through the secondary air inlet, in the secondary injector, combustion gas further mixes with air, injector generally is divided into three sections, contraction section 15, and main effect is air-breathing, reduce the drag losses that air enters, tapered or streamlined; Mixer, main effect is that air is fully mixed with combustion gas; Diffuser 16, main effect is to make gas dynamic pressure become static pressure, and flow velocity reduces, and static pressure raises, and enters burner head with this pressure and burn.Head center is established a big concentrated combustion hole 17, make flame long, and ignition temperature height, the first-class distance in annular position around the concentrated combustion hole is provided with tangential swirl formula stable flame hole 18, the perforate direction in steady combustion hole becomes side direction tangent with main flame internal flame surface, its effect is the flame stabilization that makes the concentrated combustion hole, does not take off fire.Burner head can also be that the center reaches around even isodiametric 5～7 macropores 19 that distribute in center, and flame is also longer, and the Fire Radiation scope is bigger.Two-stage injection atmospheric burner can be integral with normal atmospheric one-level injection burner, forms cell burner.Put ordinary burner head 21 at two-stage injection atmospheric burner head 20 outer shrouds, the nozzle switch 23 of ordinary burner is connected in parallel on the gas source pipe with the nozzle switch 22 of utility model, the strong if desired fire and the flame width of cloth are penetrated scope when very big, two burners are opened simultaneously, when strong if desired fire or slow fire, open two switches respectively and just can satisfy the demand.

Claims

1, a kind of by nozzle (2), the two-stage injection atmospheric burner that one-level injector (3) is formed, it is characterized in that: also include main air inlet (6) in the composition, the sleeve pipe (1) of secondary air inlet (7), secondary injector (4), the head (5) in band large-scale combustion hole, nozzle, the one-level injector, the secondary injector along gas-flow to placing successively in the sleeve pipe, the main air inlet is between jet expansion and one-level injector, the secondary air inlet is between outlet of one-level injector and secondary injector inlet, sleeve pipe peace nozzle one end connects gas source pipe, and the other end connects head.

2, a kind of described two-stage injection of claim 1 atmospheric burner of pressing is characterized in that its head center is established a big concentrated combustion hole, and the first-class distance in annular position that centers on the concentrated combustion hole is provided with tangential swirl formula stable flame hole.

3, a kind of by the described two-stage injection of claim 1 atmospheric burner, it is characterized in that its head center and around the center equal diameter 5-7 macropore that evenly distributes.

4, a kind of described two-stage injection of claim 1 atmospheric burner of pressing is characterized in that its head outer shroud puts another ordinary burner head, and the nozzle of the nozzle of this ordinary burner and two-stage injection atmospheric burner is connected in parallel on the gas source pipe.