CN2214607Y

CN2214607Y - Low pressure gas flat flame radiation nozzle

Info

Publication number: CN2214607Y
Application number: CN 94242614
Authority: CN
Inventors: 孙贻公
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 1994-09-16
Filing date: 1994-09-16
Publication date: 1995-12-06
Anticipated expiration: 2004-09-16

Abstract

The utility model provides a novel low pressure gas flat flame radiation burner for industrial furnaces. With an inner mixing technology, the novel low pressure gas flat flame radiation burner ensures gas and air to mix thoroughly in a mixed burning chamber for burning, and the jetting mouth of the burner forms a high-temperature zone. The utility model overcomes the problem of black heart existing in common flat flame burners, eliminates umbrella-shaped and bowl-shaped flame, and enhances heating speed and quality. With the utility model, burning with smooth flat flame can be formed. The utility model has strong adaptability to the fluctuation of gas pressure, large turndown ratio, and excellent energy-saving effect.

Description

Low pressure gas flat flame radiation nozzle

The present invention chews for industrial furnace provides a kind of novel combustion gas flat flame radiation to burn.

For many years, the combustion gas flat flame burns to chew at home and is widely used on the industrial furnace, has obtained obvious energy-saving effect.So-called flat flame burn chew promptly burning chew spout form one with the certain thickness plane of having of spout axis normal plate-like flame.By flat flame is burnt the layout of chewing on industrial furnace, can obtain to spread over the certain thickness flame front of having of furnace roof inwall, form the radiation furnace roof, not only make the interior temperature of stove even, and strengthened heat-transfer effect, thereby improved heating efficiency and heating quality.

Common flat flame burns to be chewed, all be to adopt exterior mixing, i.e. combustion gas and combustion air enter respectively to burn and chew, behind the certain swirl strength of cyclone acquisition separately, spray into tubaeform burning from spout passway separately respectively again and chew brick, chew the outside in burning and mix limit combustion burning.Present this burning is chewed and is had following defective:

1, the mixing of combustion gas and combustion air is inhomogeneous, insufficient, and the efficiency of combustion of chewing is burnt in influence.

2, form discoid low-temperature space at the ejiction opening place that burning is chewed, i.e. " evil mind ".

3, after the ejection of combustion gas and combustion air was burnt and chewed, the swirl strength decay was fast, can not form flat flame sometimes, and become umbrella or bowl-shape flame.

Present technique provides a kind of novel flat flame radiation to burn and has chewed, and the contrast accompanying drawing is described in detail below.

Figure: " A-A " is section of structure of the present utility model, and figure " B-B " and figure " C-C " are and burn the radial section figure that chews.Burning is chewed mainly by gas conduct pipe (1), primary air chamber (2), auxiliary air chamber (3), intercommunicating pore (4) once and between the auxiliary air chamber; Combustion gas cyclone (5), an air nozzle (6) that is communicated with primary air chamber (2); Hybrid combustor (7) with suitable volume and first and second wind inlet; The secondary spout (8) that is communicated with auxiliary air chamber (3) (diameter of spray orifice (8), angle, quantity and arrangement are determined according to the kind and the burning capacity of combustion gas); But the flow straightener of up-down adjustment (9), fire-resistant inwall (10), heat-insulation layer (11) burns and chews spout (12) and upper press cover (13) composition.

This reality is novel to be to realize like this.The combustion gas of certain pressure enters to burn from gas conduct pipe (1) and chews, and enters hybrid combustor (7) through being rotation status behind the certain swirl strength of combustion gas cyclone (5) acquisition.Combustion air enter burn chew after, be full of auxiliary air chamber (3) earlier, enter one by hole (4) again and owe air chamber (2).Enter the combustion gas of hybrid combustor (7), at first with the primary air quadrature hybrid that enters hybrid combustor (7) from circumferential weld (6), hybrid combustor (7), carry out secondary with rotational flow air again from the ejection of at an angle overfire air port (8), three quadrature hybrid, shown in contrast " A-A " figure and " C-C " figure, the quantity of secondary wind spray orifice (8) and row's number can be determined according to the size that burning is chewed burning capacity.Well-mixed combustion gas and air mixture partly burn in hybrid combustor (7), the annular mouth of chewing between spout (12) and the flow straightener (9) from burning sprays, because the product volume after the burning acutely expands, therefore the speed of ejection is very high, and the swirl strength of mixture increases, and chews in burning under the effect of loudspeaker brick, it is very strong to form rigidity, the flat flame of certain thickness plate-like is arranged, and flow straightener (9) can up-down adjustment, guarantees flameholding.

The utility model is chewed to compare with common flat flame burning has following superiority:

1, owing to mix technology in having adopted, chews the high-temperature region that ejiction opening promptly forms, eliminated common flat flame and burnt " evil mind " of chewing existence in burning.

2, fiery disk shape is smooth and regular, and thickness is even, and flame rigidity is big, has eliminated common flat flame burning and has chewed the umbrella of appearance and the phenomenon of bowl-shape flame.

3, flame spouting velocity height, momentum is big, and rotary speed is fast.

4, combustion gas and combustion air mix fully, and efficiency of combustion improves.

5, flameholding, strong to gaseous-pressure fluctuation adaptability, regulate than big.

Adopting novel low-pressure fuel gas flat flame radiation to burn on industrial furnace chews and will obtain following effect:

1, the low or frequent place of fluctuating at gaseous-pressure can be used safely.

2, after burning is chewed and eliminated " evil mind ", make furnace temperature more even, improve the temperature of radiation furnace roof.

3, the flame momentum is big, has accelerated the circulation of furnace gas in the stove, improve the intensity of convection heat transfer' heat-transfer by convection at high temperature, thereby firing rate is fast, and temperature is even.

4, burning is chewed thermal efficiency height, and fuel gas buring is complete, can save energy about 3%.

5, umbrella or bowl-shape flame can not occur, avoid occurring in the stove burning out the localized hyperthermia district of heating blank, more suitable concerning heat-treatment furnace.

Claims

1, the utility model is that a kind of combustion gas flat flame radiation burning that industrial furnace is used is chewed, and it is characterized in that being provided with hybrid combustor (7).

2, device according to claim 1 is characterized in that the sidewall of hybrid combustor (7) is provided with the secondary wind spray orifice (8) that is communicated with auxiliary air chamber (3).