JPS6030579Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vaporization-type liquid fuel combustion device in which a liquid fuel vaporization chamber is provided within the combustion chamber, the vaporization chamber is heated by its own combustion flame, and preheated by a spray burner. , which improves combustibility and prevents damage to the functional parts of the spray burner due to heat, and will be specifically explained below based on an embodiment shown in the drawings.

1 shows a vaporization type liquid fuel combustion device.

Reference numeral 3 denotes a bottomed cylindrical inner cylinder having a flame port 2 on the circumferential side, a combustion chamber 4 is formed inside, and an opening 5 is provided at the center of the bottom of the inner cylinder 3.

Reference numeral 6 denotes an inverted bottomed cylindrical vaporizing cylinder, which is attached to the bottom of the inner cylinder to cover the opening 5, and has a vaporizing chamber 7 protruding into the combustion chamber 4.

Reference numeral 8 denotes an outer cylinder that surrounds the combustion chamber 4 and forms an air supply passage 9 that communicates the vaporization chamber 7 and the flame port 2.

Reference numeral 10 denotes a spray burner that faces tangentially to an annular circulation chamber 11 formed between the vaporization cylinder 6 and the inner cylinder 3 in the combustion chamber 4, and the burner 10 has a jet nozzle 12 at its tip opening. A guide cylinder 13 with an open opening is fitted therein, and a spray nozzle 14 and an ignition electrode 15 are provided facing the spout 12.

Also, inside the vaporizing tube 6, the end of the air passage consisting of a wind box 17 and a blowing tube 18 connected to the blower 16 is opened, and the blowing tube 18 has liquid fuel directed toward the closed surface of the tip of the vaporizing tube 6. A spray device 19 is arranged.

20 is a bypass pipe that connects the inside of the wind box 17 and the spray burner 10, and the side of the wind box 17 of the bypass pipe 20 is connected to the wind box 17.
the inflow side opening 21 to face the air blowing direction,
The inlet opening 22 of the spray burner 10 is connected to the burner side wall so as to face the ignition electrode 15 inside the burner 10.

To explain the operation of this device, first, when the blower 16 is operated, the air is sent to the vaporizing chamber 7 via the air box 17 and the blow tube 18, and is also sent to the spray burner 10 via the bypass pipe 20.

There, the sprayed fuel from the spray nozzle 14 that operates the spray burner 10 is mixed with the air supplied from the bypass pipe 20 and discharged from the jet port 12, and the spark generated at the ignition electrode 15 ignites and burns.

The flame of the burner 10 rises while traveling through the circulation chamber 11, receives secondary air from the flame port 2, becomes a good combustion flame, and preheats the vaporization tube 6.

When the vaporization cylinder 6 is sufficiently preheated, the spray device 19
The liquid fuel is vaporized in the vaporization chamber 7 and mixed with the blown air, and this air-fuel mixture is sent from the air supply passage 9 to the flame nozzle 2 and ejected into the combustion chamber 4, and is heated to the spray burner. It is ignited by ten flames and burns.

Thereafter, even if the operation of the spray burner 10 is stopped, the flame port 2
The combustion flame formed during this process heats the vaporization cylinder 6, and the fuel is continuously vaporized.

However, the burner having the above configuration has the following problems.

Even after the spray burner 10 is stopped, the primary air from the burner 10 continues to be ejected into the combustion chamber 4. This ejected air flow disturbs the combustion flame formed in the flame port 2, resulting in a marked deterioration of combustibility and a large Become.

Therefore, if the amount of primary air supplied to the spray burner is kept to the minimum amount necessary for ignition, and the air necessary for combustion is supplied as secondary air from the flame nozzle 2, the above problem can be solved, but in that case, Since the air pressure inside the burner 10 decreases, the flame flows back into the burner 10, causing damage to the ignition electrode 15, etc., or adhering to the medium, which adversely affects ignition.

In contrast, in the present invention, the inlet port 21 of the bypass pipe 20 that supplies primary air to the spray burner 10 is placed in the air passage to face the air blowing direction, so that dynamic pressure is introduced into the bypass pipe 20 and the spray The blowing pressure inside the burner 10 is increased, and therefore the difference with the pressure inside the combustion chamber 4 can be increased, so that there is no flame backflow and damage to the functional parts of the burner 10 can be prevented.

Therefore, according to the present invention, the amount of air from the bypass pipe 20 can be reduced, and the combustion flame formed in the flame port 2 can also be maintained in a good condition.

In addition, as in this embodiment, the spray burner 10 of the bypass pipe 20
By arranging the inlet port 22 on the side to face the ignition electrode 15, it is possible to enlarge the mold plate and reliably ignite the spray burner 10.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the connections in FIG. 1. 2...flame port, 4...combustion chamber, 7...
... Vaporization chamber, 9 ... Air supply passage, 10 ...
... Spray burner, 20... Bypass pipe.

Claims (1)

[Scope of utility model registration request] A vaporization chamber for liquid fuel provided in a combustion chamber having a flame port on the peripheral side, a spray burner for preheating the vaporization chamber facing into the combustion chamber, an air passage opened in the vaporization chamber, and a vaporization chamber. In the device having an air supply passage for vaporized fuel that reaches the flame opening, a bypass pipe is branched and connected from the air supply passage to the above-mentioned spray burner, and the inflow side opening of the bypass pipe is arranged to face the air blowing direction in the air passage. A liquid fuel combustion device characterized by: