JPH025211Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a burner device suitable for burning a mixture of powdered solid fuel such as coal and liquid fuel such as petroleum.

In the conventional burner device of this kind, as shown in FIGS. 1 to 3, a steel spray plate 01 and a back plate 02 are mounted on a seat 03 with a cap nut 0
It is pressed and fixed at 4. The spray plate 01 is provided with a fuel passage 05, a pressure medium passage 06, and a mixing passage 07, and a pressure medium 010 consisting of fuel 09 and pressurized steam or air is mixed in the mixing passage 07. and is sprayed into the furnace from the spray hole 08. When such a burner device is used to burn fuel consisting of a mixture of powdered solid fuel and liquid fuel, the stepped constriction portion 0 of the fuel flow path 05
11 and the mixing flow path 07, and there is a problem that the spray plate 01 must be replaced in a short period of time.

The purpose of the present invention is to eliminate the drawbacks of the conventional devices described above, and to provide a burner device that has good combustion efficiency and can withstand long-term use. In the burner device, the spray plate is provided with a plurality of mixing channels that are open at intervals in the circumferential direction of the front end surface of the spray plate, and a plurality of fuel channels that are respectively connected to the mixing channels. dividing the mixing flow path into multiple parts at dividing positions;
This burner device presses and fixes the spray plate by inserting a thin ceramic tube into the mixing passage of the spray plate with a divided spray plate and fixing the spray plate with a screw or a cover on the outer surface.

According to the present invention, since the mixing channel is formed of ceramic material, the wear resistance is significantly improved and the spray plate can be used for a long period of time.

Further, according to the present invention, the ceramic capillary tube can be firmly and reliably fixed between the divided spray plates with a simple configuration, and there is no fear that the capillary tube will fall off from the spray plate.

An example in which the present invention is applied to a burner device for burning a mixed fuel of powdered solid fuel such as coal and liquid fuel such as petroleum will be described below with reference to FIG.

1 and 1' are spray plates, which are divided into two parts. 2 is a thin ceramic tube with a thin tip, and 3 is embedded in the spray plate 1 with an embedded bolt. 4 is a tightening nut. The spray plates 1, 1' are fixed with bolts 3 and nuts 4,
A thin ceramic tube 2 is pressed and fixed by a pair of spray plates 1, 1'. The spray plate 1' is provided with a fuel passage 5, a pressure medium passage 6, and a mixing passage 7, so that the fuel 9 and the pressure medium 10 are guided to the fuel passage 5 and the pressure medium passage 6, respectively. It's getting old. There may be a plurality of embedded bolts 3, or the contact surfaces of the spray plate 1 and the spray plate 1' may be made uneven to prevent rotation, or the spray plate 1 may have a plurality of embedded bolts 3.
It is also possible to insert and fix a washer, ring, etc. between the spray plate 1' and the spray plate 1'. Further, the fuel passage 5 may be used as a pressure medium passage, and the pressure medium passage 6 may be used as a fuel passage.

In the burner device as described above, the fuel 9, which is a mixture of powdered solid fuel and liquid fuel, passes through the fuel flow path 5, mixes with the pressure medium 10 in the mixing flow path 7, and is sprayed into the furnace (not shown). It is sprayed from hole 8 and burned.

According to such a burner device, the following effects can be obtained.

(a) Wear resistance is improved by using ceramic thin tubes 2 in the mixing passage 7 of the spray plate 1.

(b) Place the ceramic thin tube 2 on the spray plate 1,
It can be securely fixed between 1'. Therefore, there is no fear that the thin tube 2 will fall off from the spray plates 1, 1'.

FIG. 4 shows another embodiment of the present invention, in which instead of the embedded bolts 3 and nuts 4, the spray plate 1 and the spray plate 1' are fixed by pressure with a cover 11 on the outer surface. The cover 11 is tightened with a cap nut 12.

This structure is easy to disassemble and repair and clean.

Although the spray plates 1 and 1' are divided into two parts in the above embodiment, they can also be divided into two or more parts for the purpose of facilitating the machining of holes, etc.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the conventional device, FIG. 2 is a view taken along the - arrow in FIG. It is a figure showing an example. 1, 1'... Spray plate, 2... Ceramic thin tube, 3... Embedded bolt, 4... Tightening nut, 5... Fuel channel, 6... Pressure medium channel, 7... Mixing channel , 11... cover, 12... cap nut.

Claims (1)

[Scope of utility model registration request] The spray plate and the seat are connected by a cap nut, and a plurality of mixing channels are opened at intervals in the circumferential direction of the front end surface of the spray plate, and a plurality of fuel flows are respectively connected to the mixing channels. In the burner device equipped with a passage, the spray plate was divided into a plurality of parts at the positions where the mixing passage was divided, and a thin tube of ceramic material was inserted and fixed in the mixing passage part of the spray plate with the divided spray plate. A burner device characterized by: