CN87214912U

CN87214912U - Ejection type cup-shaped natural-gas infrared burner

Info

Publication number: CN87214912U
Application number: CN 87214912
Authority: CN
Inventors: 郭文博; 周光国; 王学琮
Original assignee: CHONGQING ARCHITECT ENG
Current assignee: CHONGQING ARCHITECT ENG
Priority date: 1987-10-30
Filing date: 1987-10-30
Publication date: 1988-10-12

Abstract

The utility model discloses an ejection type cup-shaped natural-gas infrared burner, belonging to the combustion technical field of the natural gas industry, which solves the technical problems of improving the quality and the number of products, saving the natural gas, alleviating air pollution, etc. The main technical character of the utility model is that the utility model adopts the technical measures such as the quadric injection, double-row circular fire holes, a shallow cup-shaped flame path, an anti-back-fire arrangement, etc. The structure of the burner is improved greatly to make the natural gas and air realize the optimum mixing, normal combustion, and strengthening heat transmission. The utility model adopts high temperature resistant materials and prolongs the service life of the burner, and the utility model can mainly be used for the heating process such as metal heat processing, non-metal heating, etc.

Description

Ejection type cup-shaped natural-gas infrared burner

The utility model belongs to the gas industry field of combustion technology, is mainly used in multiple heating process, as metal heat treatmet and nonmetal heating etc.

In recent years, structure to this type of gas burner continues to improve to some extent in the world, and focusing on of research is easy to use, energy savings and reduce to pollute, and publishes combustion gas low baking temperature by OH Bo Liuhanuofu work burn a book, United States Patent (USP) 4 nineteen eighty-three as the Soviet Union, 168,950; 4,239,481; 4,379,689 and this type of burner of introducing of " industry heating " magazine in Japan in July, 1985, its common characteristic is to adopt mechanical air blast or injection mixing, dark cup-shaped quirk, single flute profile fire hole and a little thermic load, and basic structure pattern and quirk, shower nozzle material all do not have big innovation.

The purpose of this utility model: be not satisfy some special heating process for combustion of natural gas does not need mechanical air blast (not power consumption), improve control of industrial furnace home and quantity, saving natural gas and alleviate pollution to atmosphere.Simultaneously, for characteristics and the natural gas burning feature that adapts to China's heating process, further improve and innovate this type of burner, and make that natural gas can mix best with air, normal combustion, reinforcement heating and prolong service life of burner, thereby the effect that reaches energy savings, pollution abatement and reduce cost.

Content of the present utility model: its structure is mainly by injector, silencer cover, double garden shape fire hole, tazza shape quirk, shower nozzle with prevent that back-fire arrangement from constituting, and adopt comprehensive technical measure such as secondary injection, according to the principle of air-flow mixing, burning and augmentation of heat transfer, optimal design have substantive innovation and this progressive burner.

Natural gas sprays by nozzle, form jet, the part air is entered with natural gas by injection from side opening and mixes, mixture sprays from nozzle again, the required surplus air that burns is entered by injection from the secondary inlet, two strands of air-flows are realized best mixing in injector, at last by preventing back-fire arrangement and uniform double garden shape fire hole, in cup-shaped quirk inner surface burning, with the infrared ray form is the main heat of emitting, a small amount of combustion product circulates in groove, cooperates with following row's fire hole, thereby realizes complete, smooth combustion.

Advantage that the utility model is compared with prior art had or good effect, its main feature is as follows:

1. combustion air sucks by the energy injection of natural gas, not consuming electric power, has the self-regulating in proportion characteristic of natural gas and air, the stove combustion process is easy to control, is convenient to realize the combustion process automation, adopts secondary injection, natural gas and Air mixing have been strengthened, guaranteeing to make the contraction in length 2/5 of injector under the constant situation of injector performance, the long shortcoming of injector when having overcome bigger load;

2. adopted silencer cover, eliminated effectively and adopted the noise that secondary injection increased, and played a part air regulating board;

3. directly collide for the following row's fire hole air-flow that guarantees double garden shape fire hole with cup-shaped quirk inner surface, getting suitable angle cooperates with cup-shaped quirk, play the retention flame, and the angle of the row's of going up fire hole is greater than the angle of arranging fire hole down, reach the effect of extending flame front, angle of row's fire hole is than big 1～5 degree of cup-shaped quirk angle [alpha] on it, and it arranges the fire hole angle down than little 1～5 degree of cup-shaped quirk angle [alpha], the wrong row of two row's fire holes, spacing is the fire hole diameter;

4. designed tazza shape quirk, the quirk angle of flare matches with the angle of arranging fire hole down, because of making RADIATION ANGLE COEFFICIENT, tazza shape quirk increases, and adopted high efficient radiation coating at the internal layer of cup-shaped quirk, strengthened heat transfer, reduced exhaust gas temperature, accelerated the temperature-rise period of stove, its angle of flare is 35 °＞α＞15 °;

5. in tazza shape quirk, designed groove, made a small amount of high-temperature combustion product in groove, follow cup, cooperated with following row's fire hole, overcome the shortcoming that natural gas easily takes off fire effectively, enlarged the adjusting ratio of burner, its groove number of rings is greater than 3, and groove garden arc radius is greater than 12 millimeters.

6. because of burner head is in the high-temperature region, for preventing the phenomenon of full premix combustion easy tempering under high temperature, underload work, ad hoc having counted prevents back-fire arrangement, is made of 7～10 purpose Fe-Cr-Al wire wire nettings;

7. because burner tip is worked under hot conditions, and general material is easily decreased by combustion, through experiment sieving heat-resistance stainless steel or resistant to elevated temperatures industrial ceramics make shower nozzle, shower nozzle is that double pore structure is for the band current divider or be not with two kinds of current dividers;

Above characteristics are confirmed in industrial experimentation, and obtain the remarkable economical effect.

The structure of this burner as shown in drawings, natural gas forms jet by nozzle (1) ejection, the part air is sucked and the natural gas mixed once by injection from side opening (2), then, flammable mixture sprays from nozzle (4) again, again that natural gas completing combustion is required residue auxiliary air is sucked by injection from inlet (3), two strands of air-flows are realized best mixing in mixing tube (5) and diffuser pipe (6), at last by prevent on back-fire arrangement (7) and the shower nozzle uniform on, following double fire hole (9) and (8), burn at cup-shaped quirk (10) inner surface, form based on infrared ray is emitted heat, a small amount of combustion product circulates in groove, cooperate with following row's fire hole (8), thereby realize fully, smooth combustion.

Realize best way of the present utility model, for the metal part, utilize metal cutting processing to finish, for non-metallic part, its preparation method is to make a mould earlier, inserts refractory material, treats air dry and sintering after compacting.

Claims

1, the cup-shaped infrared burner of prevention of natural gas ejected formula is applicable to multiple industrial heating process, it is characterized in that natural gas passes through nozzle and 1. sprays the formation jet, 2. the part air is sucked and the natural gas mixed once by injection from side opening, 4. flammable mixture sprays from nozzle again, 3. the residue auxiliary air that natural gas completing combustion is required is sucked by injection from inlet, 5. two strands of air-flows realize best the mixing with diffuser pipe in 6. at mixing tube, by prevent back-fire arrangement 7. with shower nozzle on uniform on, 9. and 8. down double fire hole, in the 10. inner surface burning of cup-shaped quirk, a small amount of combustion product circulates in groove, 8. cooperate with following row's fire hole, following row's fire hole air-flow of its double garden shape fire hole directly collides with cup-shaped quirk inner surface, getting suitable angle cooperates with cup-shaped quirk, the angle of last row's fire hole is than big 1～5 degree of cup-shaped quirk angle [alpha], under arrange the fire hole angle than cup-shaped quirk angle [alpha] little 1～5 the degree, the wrong row of two row's fire holes, spacing is the fire hole diameter, the quirk angle of flare of its tazza shape quirk matches with the angle of arranging fire hole down, the angle of flare is 35 °＞α＞15 °, in tazza shape quirk, make groove, the groove number of rings is greater than 3, groove garden arc radius is greater than 12 millimeters, and adopting high efficient radiation coating at the internal layer of cup-shaped quirk, it prevents that back-fire arrangement from being made of 7～10 purpose Fe-Cr-Al wire wire nettings.

2, shower nozzle as claimed in claim 1 is characterized in that material adopts heat-resistance stainless steel or high temperature resistant industrial ceramics to make, and shower nozzle is that double pore structure is for being with current divider or not being with two kinds of current dividers.