JPS63156907A - Gaseous fuel burner - Google Patents

Abstract

PURPOSE:To stabilize vaporizing combustion by sending combustion air into a blast guide cylinder through a blast heating passage provided between a vaporizing cylinder and a blast guide cylinder and ejecting a gaseous fuel through a gas nozzle provided at the base end part of the blast guide cylinder into the combustion air. CONSTITUTION:Low-temperature combustion air is sent from a blast chamber 117 to a blast heating passage 125 and is reversed at the top part of a vaporizing temperature and pressed into a gas chamber 110 via the inner parts of a blast guide cylinder 127 and a gas nozzle chamber 139 and ejected inwardly of the gas chamber 110. On the other hand, a gaseous fuel is supplied into a gas nozzle chamber 139 and is ejected from a gas ejection hole 144 toward combustion air within the blast guide cylinder 127. By these procedures, the gaseous fuel and the combustion air are agitated and mixed, and are formed into a complete combustion gas until it reaches a gas chamber 110. Further, since the combustion air is heated in the blast heating passage 125, the fuel can maintain a completely vaporized state. Thus, stabilized combustion can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to the heating effect of a vaporization tube while a gaseous fuel consisting of a large volume of preformed gas is flowing through a relatively long air supply heating passage. This invention relates to a gaseous fuel combustion device that can directly agitate and mix combustion air that has reached a high temperature to form a complete mixed gas, and then perform fume combustion in a stable state from a gas chamber.

Conventional technology In the past, while gas fuel, which had been preformed into a vaporized state, was passed from the mixed cylinder to the gas chamber, it was accurately mixed with forced air to form a complete mixed gas, and then the mixture was kept at a constant pressure. A gaseous fuel combustion device that can stably carry out fumarole combustion under the conditions of .

That is, a combustion plate 2 having a large number of gas ejection holes 3 perforated on the surface is disposed over the inner circumference of a bottomed cylindrical combustion cylinder 1 with an open end, and a combustion plate 2 is provided between the combustion cylinder 1 and the combustion plate 2. A gas chamber 4 is formed. In the combustion plate 2 facing the central opening 5 opened at the center of the gas chamber 4, a mixed cylinder 6 with a closed tip and an open base end is disposed between the mixed cylinder 6 and the central opening 5. The gas chamber 4 is arranged so that a fume gap 8 is formed between the fume gas chamber 7 provided around the mixed cylinder 6 and the gas chamber 4 through the central opening 5.
Communicate with. The blower tube 9, which is deeply inserted into the mixed cylinder 6 from the bottomed side of the combustion tube 1 through the central opening 5, is formed in a donut shape as a whole, and has a large number of gas ejection holes 11 perforated on the curved surface. It is constructed by disposing a gas ejecting body 10.

Problems to be solved by the invention By the way, in the conventional gas fuel combustion apparatus of this type,
The gas ejector for ejecting gaseous fuel into the mixed cylinder had a donut shape as a whole and was placed near the opening on the tip side of the blower cylinder through which low-temperature combustion air was flowing, so that ventilation was prevented. The volume of the gas ejection body may be increased (because it cannot be formed, the number of gas ejection holes drilled on the surface of the gas ejection body must also be reduced), which may be a hindrance and make it impossible to obtain the desired combustion air i accurately. (As a result, the speed of gaseous fuel ejected from each gas nozzle becomes extremely large during large-capacity vaporization combustion, and after being ejected forcefully into the mixed cylinder, it is distributed along the inner surface of the mixed cylinder. Finally, it appears to be press-fitted into the gas chamber.

Therefore, the gaseous fuel is not stirred and mixed with the low-temperature combustion air that is blown toward the mixture cylinder in the blast cylinder (it is pressurized into the gas chamber while being separated from the combustion air, so that a complete mixture is created). There was a problem in that it did not turn into gas and was burned in an unstable state during vaporization combustion.

Means for Solving the Problems The present invention solves the above-mentioned problems, and the details thereof will be explained below with reference to FIGS. 1 and 2, which correspond to embodiments.

That is, a vaporizing tube 121 with one end open, a gas chamber 110 communicating with the open end of the vaporizing tube 121 and disposed around the vaporizing tube 121, and an air supply guide tube 127 communicating with the gas chamber 110. deeply into the vaporizing cylinder 121. An air heating passage 125 is formed between the inner circumferential wall surface of the vaporizing tube 121 and the outer circumferential wall surface of the air feeding guide tube 127, through which combustion air flows from the base end toward the top of the vaporizing tube 127.

A gas nozzle chamber 1 formed in a hollow cylindrical shape is provided on the inner periphery of the base end side of the air supply guide tube 127 so that gaseous fuel is stored inside.
39 will be installed. Inner peripheral wall surface 1 of the gas nozzle chamber 139
40 includes a large number of gas ejection holes 144 that eject gaseous fuel from the air heating passage 125 toward the heating combustion air that flows into the gas chamber 110 after passing through the inside of the air feeding guide tube 127 and directly stirring and mixing the fuel. It is constructed by perforating...

Operation Now, when starting combustion of gaseous fuel, low-temperature combustion air is blown from the blowing chamber 117 to the base end side of the air heating passage 125 formed between the vaporization tube 121 and the air feeding guide tube 127. Then, the low-temperature combustion air is blown to the top of the vaporizer cylinder 121 along the air supply heating passage 125, and then the air is blown to the top of the vaporizer cylinder 121.
After being reversed at the top and smoothly flowing through the air supply guide tube 121 and the gas nozzle chamber 139, it is press-fitted into the gas chamber 110 and ejected inward from the gas chamber 110.

Therefore, under the above conditions, the gas nozzle chamber 13
When gaseous fuel is supplied into the gas nozzle chamber 139 , the gaseous fuel is vigorously jetted out from the gas jet holes 144 formed in a large number on the inner circumferential wall surface 140 of the gas nozzle chamber 139 , and flows through the air supply heating passage 125 into the air supply guide tube 127 . It collides with the combustion air passing through and flowing into the gas chamber 110 and is stirred and mixed, quickly becoming a mixed gas and being pressurized into the gas chamber 110. and gas chamber 11
The mixed gas pressurized into the gas chamber 110 is combusted in the gas chamber 110 in a state of equal pressure, and the vaporized combustion flame burns the gas in the vaporization tube 12.
Heat 1 intensely. As a result, the low-temperature combustion air flowing through the air heating passage 125 quickly reaches a high temperature state due to the heating effect of the vaporized Fi 121 while flowing through the relatively long air heating passage 125. The gaseous fuel does not turn into a liquefied state when mixed, but is reliably stirred and mixed, becomes a more complete mixed gas, and is pressurized into the gas chamber 110, allowing stable vaporization and combustion.

Embodiment A preferred embodiment of the configuration of a gaseous fuel combustion apparatus according to the present invention is illustrated in the accompanying drawings.

In FIGS. 1 and 2, 101 has a vertical cylindrical wall 102 with a polygonal cross section and an open upper end, and a bottom wall 103 has an annular bulge in the center that bulges outward. A bottomed combustion body provided with a portion 104, the combustion body 10
1, there are many flame holes 1 all around the vertical cylinder wall 106.
Combustion discs 105 with holes 01... and a recessed combustion chamber 109 provided in the center of the bottom wall 108 are stretched at intervals, and the combustion body 101 and the combustion disc 105 are connected. A gas chamber 110 is formed in between.

The recessed combustion chamber 109 described above is formed by a cylindrical wall 111 and a bottom wall 112. On the inner bottom side of the recessed combustion chamber 109, there is an air supply passage 113t-opening air supply chamber ring 119 in the center.
An air blowing chamber 114 having an air blowing swirl guide path 115 inside is disposed between the air blowing chamber ring 119 and the bottom wall 112 of the recessed combustion chamber 109.

Reference numeral 116 denotes a plurality of swirling blowholes opened toward one side on the surface of the air supply chamber ring 119, and the swirling blowholes 116
The combustion air that is atomized is swirled within the recessed combustion chamber 109.

The air supply chamber 114 includes a ventilation chamber 117 adjacent to the annular bulging portion 104 side of the combustion body 101 and a plurality of air supply pipes 118 .
Communication is made via...

Reference numeral 120 denotes a rotating shaft inserted from the blowing chamber 117 side toward the center of the combustion body 101, and at the tip of the rotating shaft 120 is a vaporizing cylinder 121 whose base end is open so as to cover the rotating shaft 120. are directly connected.

The open end of the vaporization tube 121 is bent outward and protruded, and a fuel scattering gap 123 is formed between the end of the vaporization tube 121 and the mixed cylinder 122, which has a hollow shape on the peripheral end surface. It must be installed in one piece. 124 is a rotation gap.

125 is attached to the end of the communication port 128 that opens at the center of the annular bulge 104 on the inner peripheral wall surface and bottom side of the vaporization cylinder 121,
The air heating passage 1250 is formed between the air heating passage 1250 and the outer circumferential wall surface of the air feeding guide tube 127 inserted and standing upright so that the upper end opening faces the vicinity of the top of the vaporization cylinder 121.
The proximal end side is connected to the air supply chamber 114 via the air supply path 113, and the distal end side is connected to the gas chamber 114 through the inside of the air supply guide tube 127.
10. Reference numeral 126 denotes an auxiliary nozzle hole 126 formed in an appropriate number in the cylindrical wall 111 of the recessed combustion chamber 109 located above the air supply chamber 114. urge Reference numeral 129 denotes a hollow fuel diffuser that is integrally attached to the inner surface of the top of the vaporizer tube 121, and is connected to the inner surface of the vaporizer tube 121 and the fuel diffuser 1.
A fuel scattering gap in an appropriate manner is provided between the upper end surface of 29 and the upper end surface. Reference numeral 130 denotes a fuel supply pipe for feeding fuel to the inner surface of the lower part of the fuel oil diffuser 129, and this fuel supply pipe 1
30 is used when liquid fuel is vaporized and burned instead of gaseous fuel. In that case, the liquid fuel is sent from the fuel supply pipe 130 to the fuel oil diffuser 129, and then the liquid fuel is allowed to flow down in the form of fuel diffusion, and then combustion air is introduced into the recessed combustion chamber 109 from the fuel scattering gap 123. At the same time, it is scattered in fine particles to cause main combustion, and at the same time it intensely heats the vaporizer cylinder 121, evaporates and vaporizes the liquid fuel supplied thereafter, and mixes the vaporized gas with combustion air to form a mixed gas. After, gas chamber 110
It is press-fitted into the tank to cause vaporization and combustion.

131 has its lower end connected to the bottom wall 103 of the combustion body 101 and its upper end connected to the bottom wall 108 of the combustion disk 105 in order to connect the inside of the combustion disk 105 and the blowing chamber 117 through the gas chamber 110. If the combustion body 101 has a rectangular shape as shown in FIG. A plurality of supply cylinders 131 are provided at symmetrical positions on both sides, and a plurality of supply cylinders 131 are respectively arranged at these left and right positions.
. . . Fumarole diffusion guide plates 132 made of one sheet having an arcuate inner side are arranged at intervals above the openings.

Then, around the fume diffusion guide plate 132 provided so as to cover the upper opening of the feed cylinder 131......, the fume gas diffusion guide plate 1
A blowing hole 133 is opened for blowing the cooling combustion air blown against the combustion disk 32 to the surroundings along the bottom wall 108 of the combustion disk 105. Reference numeral 134 indicates a mounting flange 135 provided on the tip side of the combustion body 101 and a combustion plate 1.
A plurality of blowholes for secondary combustion air are provided through the joint with the mounting flange 136 provided on the tip side of the 05. 137
is a flame stabilizing ring attached to the inner periphery of the combustion disk 105 so as to be bent toward the free end side or inward.

138 is a drain pipe.

Reference numeral 139 denotes a gas nozzle chamber disposed inside the base end of the air supply guide tube 127, and the gas nozzle chamber 139 is connected to the inner circumferential wall 14.
0 and the outer peripheral wall 141, and the inner peripheral wall 140 and the outer peripheral wall 141
The gas nozzle chamber 139 is integrally attached to form a hollow cylindrical chamber sealed at both the distal end and the proximal end, and the inside of the distal end of the gas nozzle chamber 139 has a ventilation port 142, and the inside of the proximal end has a ventilation hole 142. It is formed at the ventilation outlet 143. Then, four gas lJRs are formed on the inner circumferential wall 140 of the gas nozzle chamber 139.
Outlet hole 144t - perforated and gas nozzle chamber 139
A plurality of gaseous fuel supply pipes 145 are connected in an open manner to the base end of the gas nozzle chamber 13 .
The gaseous fuel supplied into the gas chamber 9 is ejected from the air supply heating passage 125 toward the heating combustion air that passes through the air supply guide tube 127 and flows into the gas chamber 110, and is directly stirred and mixed to create a complete mixed gas. to arise.

Effects of the Invention In short, since the present invention has the technical means described above, the gas nozzle chamber 139, which has a large internal volume for accommodating gaseous fuel, is installed at the base of the air supply guide cylinder 121, compared to conventional gaseous fuel combustion devices. The air supply guide can be easily installed in a relatively wide space on the inner periphery of the end side without generating any airflow resistance, and a large volume of gaseous fuel can be ejected under an equal pressure condition for vaporization and combustion. Since the tube 121 is deeply inserted into the vaporizing tube 121, the air heating passage 12 formed between the outer circumferential wall surface of the air guide tube 127 and the outer circumferential wall surface of the vaporizing tube 121
5 can be formed relatively long, so that the low-temperature combustion air sent from the air supply chamber 114 to the air supply heating passage 125 is quickly brought to a high temperature state by the heating action of the vaporization tube 121 during its circulation, and the gas is heated. By accurately stirring and mixing fuel and combustion air, a complete and high-temperature mixed gas is generated, which has the effect of vaporizing and burning the high-temperature mixed gas in a stable state. .

[Brief explanation of the drawing]

The drawings show an embodiment of the gaseous fuel combustion apparatus according to the present invention, in which Fig. 1 is a partially cutaway longitudinal sectional front view, Fig. 2 is a plan view of the same, and Fig. 3 is an example of a conventional example. It is a longitudinal sectional front view with a part cut away. 110... Gas chamber, 121... Vaporizer cylinder, 125...
・Air supply heating passage, 127... Air supply guide tube, 139...
・Gas nozzle chamber, 140... Inner peripheral wall surface of the gas nozzle chamber, 144... Gas ejection hole

Claims (1)

[Claims] A vaporizing cylinder with one end open, the open end of the vaporizing cylinder communicating with the other, a gas chamber disposed around the vaporizing cylinder, and an air supply guide cylinder communicating with the gas chamber being inserted into the vaporizing cylinder. An air heating passage is formed between the inner peripheral wall surface of the vaporization cylinder and the outer peripheral wall surface of the air supply guide cylinder, and a gas nozzle chamber having a hollow cylindrical shape is arranged on the inner periphery of the proximal end of the air supply guide cylinder. At the same time, on the inner circumferential wall surface of the gas nozzle chamber, a large number of gases are ejected from the air heating passage toward the heated combustion air that flows into the gas chamber through the inside of the air feeding guide cylinder and directly stirs and mixes the gaseous fuel. A gaseous fuel combustion device characterized by having a nozzle hole.