JPH0227308Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a burner for coal slurry fuel such as coal-slurry (CWM), coal-oil slurry (COM), coal-methanol slurry (CMM), etc. be.

[Prior Art] Since coal slurry fuel is atomized and sprayed, a slurry supply hole b and a plurality of atomizing medium supply holes c arranged in an annular manner around its outer circumference are provided at the tip of a fuel supply cylinder a, as shown in FIG. a burner plug d having a burner plate g having a primary mixing chamber f in which the slurry from the slurry supply chamber e and the spray medium from each spray medium supply hole c are initially mixed; A secondary mixing chamber h for secondary mixing of fuel and a burner chip j having spray holes i are sequentially attached and fixed to a burner k, which disperses the fuel into fine particles and sprays it into the spray medium.

[Problems to be solved by the invention] However, conventionally, the burner plate g and the burner chip j are simply mounted on top of each other, so the positional relationship between the primary mixing chamber f of the burner plate g and the spray hole i of the burner chip j is As shown in Figure 4, the misalignment occurs, and the mixed fuel ejected from each primary mixing chamber f does not flow evenly into the spray holes i on both sides, and the mixed fuel ejected from each primary mixing chamber f flows into the burner tip j.
The rate at which the spray collides with the back wall l of the secondary mixing chamber h and exits from the spray hole i without being subjected to secondary mixing increases, resulting in cases where the mixing effect is not sufficiently exerted.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, in the present invention, a burner plate having a plurality of primary mixing chambers in the circumferential direction is provided with a plurality of primary mixing chambers in the circumferential direction. The burner was configured such that burner chips having the same number of spray holes could be fixed and shifted in phase in the circumferential direction so that the spray holes were positioned approximately midway between adjacent primary mixing chambers.

[Operation] The primary mixed fuel injected from the primary mixing chamber of the burner plate always hits the back wall of the secondary mixing chamber of the burner chip at approximately the middle of the adjacent spray holes, is reflected into the secondary mixing chamber, and is mixed in the secondary mixing chamber. After that, the mixture flows out from adjacent spray holes almost evenly and is sprayed in a well-mixed state.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 and 2 show an embodiment of the present invention, in which 1 is a burner plug, 2 is a slurry supply hole, and 3 is a burner plug.
is a spray medium supply hole, 4 is a burner plate, 5 is a slurry introduction chamber, 6 is a slurry introduction pore, 7 is a spray medium introduction pore, 8 is a plurality of annular primary mixing chambers arranged at approximately equal intervals, 9 is a burner chip, 10 is a secondary mixing chamber, 11 is a spray hole arranged in an annular shape with a diameter smaller than that of the primary mixing chamber 8 and at approximately equal intervals, the same number as the primary mixing chamber 8; Positioning holes 12, 12, 13, 13 are drilled at symmetrical positions near the outer periphery of each surface where the burner chip 9 and the burner chip 9 come into contact.
The burner plate 4 and burner chip 9 can be positioned by inserting positioning pins 14, 14 into the burner plate 3. Here, the relative positions of the burner plate 4 and the burner tip 9 are such that, as shown in FIG. The positional relationship is such that it is projected.

In the figure, 16 indicates a fuel supply cylinder.

With the above configuration, when assembling the burner, use the positioning holes 12 and 1 of the burner plate 4.
The burner tip 9 is attached by inserting the positioning pins 14, 14 into the burner tip 2, respectively, and then fitting the positioning holes 13, 13 of the burner tip 9 into the respective positioning pins 14, 14.

Thereby, the burner plate 4 and the burner chip 9 can be quickly and easily attached in a fixed positional relationship at all times.

By assembling the burner in this way, the coal slurry and the primary mixed fuel of the spray medium that have been primarily mixed in each of the primary mixing chambers 8 of the burner plate 4 travel approximately straight through the secondary mixing chamber 10, and The mixture hits the back wall 15 at approximately the middle of each of the 10 adjacent spray holes 11, is reflected into the secondary mixing chamber 10, is mixed, and then flows out from the adjacent spray holes 11 approximately equally. Therefore, since the secondary mixing in the secondary mixing chamber 10 is ideally performed, the secondary mixed fuel sprayed from each spray hole 11 has atomized coal slurry and burns well.

It should be noted that the burner of the present invention is not limited to the above-mentioned embodiments, and the number of positioning holes and positioning pins is not limited to two, but may be one or three or more, and the relative position of the burner plug and burner chip is Of course, various changes can be made without departing from the gist of the present invention, such as not needing to use positioning holes and positioning pins.

[Effects of the invention] As explained above, according to the burner of the invention,
Since each primary mixing chamber of the burner plate can be fixed by shifting the phase in the circumferential direction so that it is located approximately in the middle of each adjacent spray hole of the burner chip, the primary mixed fuel hits the back wall of the secondary mixing chamber and the secondary After being reflected into the mixing chamber and mixed, it is evenly sprayed from each spray hole, and the secondary mixing of slurry fuel can always be performed under ideal conditions, and the above effects can be achieved with a simple configuration. Various excellent effects can be achieved, such as being easily realized at almost no cost.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the burner of the present invention;
FIG. 2 is a view taken in the negative direction of FIG. 1, FIG. 3 is an explanatory diagram showing an example of a conventional burner, and FIG. 4 is a view taken in the negative direction of FIG. 3. 1 is a burner plug, 4 is a burner plate, 8 is a primary mixing chamber, 9 is a burner chip, 10 is a secondary mixing chamber, 11 is a spray hole, 12 and 13 are positioning holes, 1
4 indicates a positioning pin, and 15 indicates a back wall.

Claims (1)

[Scope of utility model registration request] At the tip of a burner plate having a plurality of primary mixing chambers in the circumferential direction, a burner chip having the same number of spray holes as the primary mixing chambers in the circumferential direction is installed so that the spray holes are located approximately in the middle of each adjacent primary mixing chamber. A burner characterized in that it can be fixed by shifting its phase.