JPS58168806A - Burner for com - Google Patents

Abstract

PURPOSE:To obtain a burner for COM superior in wear resisting property, by determining the Vickers hardness of burner material higher than 1,000. CONSTITUTION:A burner body is molded by arbitarily blending several kinds of material such as porcelain alumina, densified silicon carbode, and densified silicon nitride, of which Vickers hardenesses are higher than 1,000. The numeral 1 shows a COM feeding port, 2 shows a sprayed steam feeding port, and 3 is a mixing chamber. By the intermediary of the mixing chamber 3, COM is sprayed from the ports 5 of a spray cap 4. With such an arrangement, a burner for COM superior in wear resisting property can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burner with excellent corrosion resistance.

Various types of burners are used in various types of combustion devices, and their configurations are selected depending on the purpose of each burner.

Conventional fuels were heavy oil, gas, etc., so the problem of burner wear due to fuel was rarely observed, but due to high oil prices in recent years, COM (e6ak4 oil)
It has been considered to use the Mixture).

However, when coal or coke powder is mixed in, wear of the burner becomes significant, which has not been a problem up to now, and this hinders continuous combustion, and a solution to this problem has been desired.

The present invention is a COM burner Kr1l with excellent wear resistance.
Therefore, when eOM is atomized by high-velocity fluid, it is subject to significant wear, especially at the fuel focus. For this reason, heat-resistant and wear-resistant steel such as 8U8304 or high manganese steel was used in the past, but its lifespan was extremely short compared to when oil was used as the fuel. However, even if a burner made of ceramics, which is harder than coal, was used, the service life could not be expected with conventional chamotte or high alumina burners.

In the present invention, it has been discovered that by making the burner body have a hardness of 1000 or more, it has a service life that is not found in conventional materials.

The present invention will be explained in detail below.

Tooth powder 30 crushed to 100μm or less as COM
A mixture of 70 parts by weight of heavy oil and 70 parts by weight was prepared. This was preheated to 95°C and fed under pressure through a burner at a pressure of 12415i, while water vapor at a pressure of 13 kf/cIA and water vapor at a pressure of 6
Water of 4/c, i was force-fed to the burner and atomized from the burner having the structure shown in FIG. 1, and a wear resistance test of the burner was conducted. In the figure, 1 is a COM supply port, 2 is a spray steam supply port, and 3 is a mixing chamber, from which COM is atomized from the hole 5 of the spray cap 4.

For comparison, the hardness and service life of 8 US 304 and high manganese steel bars are listed in the table below. The life time due to shore abrasion was defined as the time during which the hole in the spray cap, which had a diameter of 5 .phi., became 5.5-.

As shown in this table, the lifespan was ten times longer than that of conventional 8UJ 304 copper, etc., and a burner that could be used continuously as a combustion furnace burner was obtained.

Although the burner structure in the above embodiment was constructed of four materials, it may be made of a suitable combination of porcelain alumina, dense silicon carbide, and dense silicon nitride. In this case, it is preferable not to use tan 1 gesten carbide or titanium carbide in combination, as their thermal I# expansion is significantly different from that of queen ceramic.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention. 1... Supply port 2... Spray steam supply port 3.-
・Mixing chamber 4... Spray cap 5... Hole Inventor Shunzo Shimai Inventor Ai Ando Inventor Takashi Kokai Applicant Toshiba Ceramics Co., Ltd. Figure 1 Procedural Amendment May 26, 1980 Patent Office Director Haruki Shimada 1, Indication of the case Patent Application No. 57-53193 2, Name of the invention COM burner 3, Person making the amendment Relationship to the case Patent applicant 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160 No. 4, Voluntary amendment 56: Claims column of the specification subject to amendment Column 6: Detailed description of the invention in the description, Contents of the amendment (1) Correct the claims column of the specification as shown in the attached sheet do. (2) On page 2, line 3 of the specification, “coaksOi
I M 1XtUreJ and rcOke o
Corrected as ilM 1xtureJ. (3) In the 5th line of page 2 of the statement box, delete ``1 coal or''. (4) In lines 15-16 of page 2 of the specification cylinder, the statement [Although coal has a higher hardness than metals, etc.] has been deleted. (5) On page 2 of the specification, line 16, the phrase ``1 coal'' is corrected to ``coke.'' (6) In the first line of page 3 of the specification box, the word "hardness" is corrected to read "1-Vice hardness". 2-2, Claims (1) Mixing of coke and petroleum by high-speed fluid
A burner for COM that atomizes MFL, characterized in that the burner material has a Vickers hardness of 1000 or more. (2) The burner according to claim 1, characterized in that it is made of one or more of porcelain alumina, 1R dense silicon carbide, and dense silicon nitride. (3) The burner according to claim 1, characterized in that it is made of tungsten carbide or titanium carbide. 29

Claims (3)

[Claims] (1) A burner that atomizes a mixed fuel of coal and petroleum using a high-speed fluid, characterized in that the burner material has a Witzkars hardness of 1000 or more.
burner. (2) The burner according to claim 1, characterized in that it is made of one or more of porcelain alumina, dense silicon carbide, and dense silicon nitride. (3) The burner according to claim 1, characterized in that it is made of tungsten carbide or titanium carbide.