JPS6183816A - Nozzle of burner - Google Patents

Abstract

PURPOSE:To contrive to prevent the orifice utilized in a boiler and a heating furnace which are operated continuously for long time from melting damage and deformation by a method wherein an orifice member made of non-oxide ceramics having an orifice is fixed by calking to an outer periphery composing body made of heat resisting metal. CONSTITUTION:An orifice member 2 made of non-oxide ceramics is fitted to the top end of an outer periphery composing body 1 made of heat resisting metal such as a SUS310 and the like. The orifice member 2 having approximate ring shape is made of non-oxide ceramics having exceedingly excellent heat resistance and wear resistance compared with a heat resistant steel. Even when nozzle having above structure is operated for long time in a boiler and a heating furnace, an orifice 4 is prevented from melting damage, deformation or enlargement of inner diameter thereof as the orifice 4 part is made of non-oxide ceramics. Further, at the replacement of the orifice member 2, the replacing working is very easy as the orifice is fitted by only calking.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a burner nozzle that is suitable for use in boilers, heating furnaces, and the like.

LL Vertical Crossing 1 As is well known, the burner nozzle for fuel HnrJI is
Heat resistance and abrasion resistance are strongly required.

Conventional burner nozzles are usually made of heat-resistant metal such as 5US310. However, the problem that the invention aims to solve is that of boilers that are operated repeatedly for a long period of time.
The orifice of the tip of a burner such as a heating furnace can melt or become deformed in a short period of time due to the passage of high-temperature air or foreign matter contained in the fuel, and the orifice may wear out.
The hole diameter will change.

11L1 Disturbance This invention was made to solve the above problems, and provides a long-life burner nozzle in which the orifice does not melt or deform even when used in boilers and heating furnaces that are operated continuously for long periods of time. The purpose is to provide

To λi11 Therefore, in order to achieve this object, the gist of the present invention is to replace the orifice member formed of non-oxide ceramic with heat-resistant metal in the nozzle of a burner installed in a boiler or heating furnace. A burner nozzle characterized in that the orifice member is fixed to the outer circumferential structure by being fitted into the outer circumferential structure and caulking the outer circumferential structure.

An orifice member 2 made of non-oxide ceramics and having an orifice 4 is closely attached to the outer circumferential structure 1 made of heat-resistant gold hA in order to solve the gap between v and n points.
Insert C, and swage the outer peripheral structure 1 to fix the orifice member 2.

Even if the boiler heating furnace is installed in an L-pan boiler or an IJ [1 heating furnace, etc.] and operated for a long time, the orifice 4 will not melt or deform, and it is only fixed by caulking, so the orifice member 2 can be replaced. can be easily done.

1 pair of husbands The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a sectional view in the ejection direction showing a first embodiment of the burner nozzle of this invention, and FIG. 2 is a plan view thereof.

This nozzle has an orifice member 2 made of non-oxide ceramic fitted to the tip of an outer peripheral structure 1 made of heat-resistant gold B such as 5jJS310.

The outer peripheral structure 1 has a tapered high-temperature fluid flow path 3 whose inner diameter decreases as it approaches the orifice member 2, and the minimum diameter of this high-temperature fluid flow path 3 and the inner diameter of the orifice 4 of the orifice member 2 are the same. is consistent with The above nozzle is
It is attached to a boiler or heating furnace, and is used to blow out fuel gas, hot air, etc.

The orifice member 2 has a ring shape and is made of non-oxide ceramics, which has extremely superior heat resistance and wear resistance compared to heat-resistant steel.

Examples of non-oxide ceramics include silicon nitride and silicon carbide.

The orifice member 2 is fitted into a recess 5 formed at the tip of the outer circumferential structure 1, and a fixing piece 6 (in the embodiment, a fixing piece 6 is formed by caulking several places on the outer periphery of the bracket recess 5 (in the example, four places are formed equally on the circumference) It is fixed to the outer circumferential structure 1 so as not to be bent by the
It is shi.

A nozzle with this structure can be attached to a boiler or heating furnace, etc., and the boiler or heating furnace can be operated continuously for long periods of time to reduce temperatures down to °C.
Since the orifice 4 is made of non-oxide Reramix, there is no possibility of the orifice or chair 4 folding or deforming, or the inner diameter of the orifice widening.

When replacing the orifice member 2, the replacement is easy because the orifice member 2 is simply attached by caulking.

Note that if a sufficient caulking allowance is provided for the fixing piece 6, there is no possibility that the orifice member 2 will fall off even if the temperature rises by 1-1.

Furthermore, since the orifice member 2 is attached by caulking, cracking of the orifice member 4 due to thermal expansion can be suppressed.

Firstly, second to fourth embodiments of the burner nozzle of the present invention will be explained with reference to FIGS. 3 to 5.

In the second embodiment, as shown in FIG. 3, four parts 15 are formed at the tip of a cylindrical heat-resistant metal outer peripheral structure 11. As in the first embodiment, a ring-shaped orifice member 12 made of non-oxide Relamic is fitted into this recess 15.
It is fixed by a plurality of fixing pieces 16 formed around the concave portion 15 by caulking at equal circumferences.

The inner diameter of the orifice 17I of the orifice member 12 is set to be smaller than the uniform inner diameter of the high temperature fluid flow path 13 of the outer peripheral structure 11.

In the third embodiment, as shown in FIG. 4, an orifice member 22 made of non-oxide ceramic is fitted into the four parts 25 at the tip of a cylindrical heat-resistant metal outer peripheral structure 21. It is fixed by a plurality of fixing pieces 26 formed by caulking at equal intervals around the circumference.

In this embodiment, the high-temperature fluid flow path 23 of the outer peripheral structure 21 includes a uniform inner diameter portion 23a and a tapered inner diameter portion 23b. The A refill 24 of the orifice member 22 has a tapered inner diameter portion 2.
It has a tapered portion 24a continuous to 3b and a reverse tapered portion 24b.

Furthermore, in the fourth embodiment (as shown in FIG. 5), a recess member 32 made of a non-oxide material Relamiku and having a substantially arcuate cross-sectional shape is fitted into the recess 35 of the heat-resistant metal outer peripheral structure 31. This orifice member 32 is fixed by a plurality of fixing pieces 36 formed by caulking at equal circumferences.

In this embodiment, the high-temperature fluid flow path 33 of the outer peripheral structure 31 has a uniform inner diameter, and the A-refice 34 of the orifice member 32 has a
It has multiple stages radially.

By the way, it goes without saying that the barb nozzle of the present invention is not limited to the above-described embodiments, and various modifications can be made depending on the application.

IL, mouth [L L? /, l-As is clear from the explanation, only the orifice portion at the tip of the nozzle is made of highly heat-resistant and wear-resistant non-oxide ceramics, and is made of heat-resistant metal. Since the orifice member is fixed by caulking a part of the outer peripheral structure, the orifice will not deform the melt 10 even if used in small vessels or heating furnaces that operate continuously for long periods of time. First, not only is the life of the nozzle extended, but the orifice member is attached to the outer peripheral structure by simply caulking, so there is no risk of thermal expansion of the orifice member.
However, it is easy to replace it (there is a 9th Sensong era...

[Brief explanation of the drawing]

Fig. 1 is a sectional view in the ejection direction showing a first embodiment of the burner nozzle of the present invention, Fig. 2 is a cross-sectional view of the same, and Figs. FIG. 3 is a cross-sectional view in the injection direction showing an example of the invention.

Claims (1)

[Claims] In a burner nozzle installed in a boiler, heating furnace, etc., an orifice member made of non-oxide ceramics is fitted into an outer circumferential structure made of heat-resistant metal, and the outer circumferential structure is caulked to form an orifice member. A burner nozzle, characterized in that the burner nozzle is configured to be fixed to an outer peripheral structure.