JPS63156908A - Gaseous fuel burner - Google Patents

Abstract

PURPOSE:To stabilize vaporizing combustion by inserting a blast guide member into a vaporizing cylinder, forming a blast heating passage between the blast guide member and the inner peripheral wall surface of the vaporizing cylinder and ejecting a gaseous fuel into a vaporizing cylinder from the side of the blast guide member. CONSTITUTION:Low-temperature combustion air is sent from a blast chamber 117 to a blast heating chamber 125, and reversed at the top part of a vaporizing cylinder 121. The combustion gas is then pressed into a gas chamber 110 via the inside of a blast guide member 127, and is ejected inwardly of the gas chamber 110. On the other hand, when a gaseous fuel is supplied from a fuel supply pipe 145 into the blast guide member 127, the gaseous fuel is ejected through a gas ejection holes 144 over a wide range of the inner peripheral wall surface of the vaporizing cylinder 121, and is agitated and mixed with air until it reaches the gas chamber 110 via a blast heating passage 125 and a blast guide member 127 and is heated within the heating passage 125 and is formed into a mixed gas in a completely vaporized state. By this arrangements vaporizing combustion can be stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to supplying a gaseous fuel consisting of a large amount of gas or the like which has been preformed to a wide range of the inner circumferential wall surface of a vaporization cylinder from the surface of an air supply guide having a hollow cylindrical shape. By ejecting the gaseous fuel across the air, the gaseous fuel is heated at a high temperature and passes through the air supply guide through the air supply heating passage and is directly stirred and mixed with the combustion air flowing into the gas chamber, producing a complete hot gas. The present invention relates to a gaseous fuel combustion device that can perform fume combustion in a stable state from a gas chamber.

Conventional technology In the past, gas fuel, which had been preformed into a vaporized state, was mixed with forced air while flowing from a hot cylinder to a gas chamber to form a complete mixed gas, which was then kept at a constant pressure. A gaseous fuel combustion apparatus capable of stably carrying out fumarole combustion under certain conditions is known and was described in, for example, Japanese Utility Model Publication No. 55-40414 prior to the filing of this application, the contents of which will be explained with reference to FIG.

That is, a combustion plate 2 having a large number of gas injection holes 3 fully perforated on the surface is disposed over the inner periphery of a bottomed cylindrical combustion cylinder 1 with an open end, and 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 in the center of the waste 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 mixture cylinder 6 is connected from the bottomed side of the combustion cylinder 1 through the central opening 5.
A gas ejecting body 10, which is formed in a donut shape as a whole and has a large number of gas ejecting holes 11 on its curved surface, is disposed in a blowing tube 9 that is deeply inserted into the air blowing tube 9.

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. Not only does this hinder the ability to accurately obtain the desired amount of combustion air, but since the volume of the gas ejector cannot be made large, the number of gas ejection holes drilled on the surface of the gas ejector inevitably decreases. The speed of the gaseous fuel ejected from each gas nozzle becomes extremely high during large-capacity vaporization combustion, and after being vigorously ejected into the mixed cylinder, it circulates along the inner peripheral surface of the mixed cylinder. Finally, it appears to be press-fitted into the gas chamber.

Therefore, the gaseous fuel is injected into the gas chamber while being separated from the combustion air without stirring and mixing with the low-temperature combustion air that is blown inside the blower cylinder toward the mixture cylinder, so that a complete mixture is created. There is a problem that the mixture cylinder is heated more than necessary and is burnt out and deformed when vaporization combustion continues.

Means for Solving the Problems The present invention solves the above problems, and is as follows:
The contents will be explained below with reference to FIGS. 1 and 2 corresponding to the embodiment.

That is, it includes a vaporizing tube 121 with one end open, and a gas chamber 110 communicating with the open end of the vaporizing tube 121 and disposed around the vaporizing tube 121.

In the vaporization tube 121, a hollow cylindrical air supply guide 127 is opened at both the distal end and the proximal end, the distal end communicates with the gas chamber 110, and the inside is formed into a gas nozzle chamber 139. insert. An air heating passage 125 is formed between the inner circumferential wall surface of the vaporizing cylinder 121 and the outer circumferential wall surface of the air feeding guide body 127, through which combustion air flows from the base end toward the top of the vaporizing cylinder 121.

The air supply guide body 127 has a large number of gas ejection holes 144 perforated on its surface to eject gaseous fuel over a wide range of the inner circumferential wall surface of the vaporization tube 121. be.

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 127.

Then, the low-temperature combustion air is blown to the top of the vaporization tube 121 along the air heating passage 125, and further to the top of the vaporization tube 121.
After being reversed at the top and smoothly flowing inside the air supply guide 127, it is press-fitted into the gas chamber 110, and is emitted inward from the gas chamber 110.

Therefore, under the above conditions, the air supply guide 127
If gaseous fuel is supplied into the air guide body 1, the gaseous fuel
270 A large number of gas ejection holes 144 perforated on the surface...
. . . The gas is ejected over a wide area toward the inner circumferential wall surface of the vaporizing cylinder 121. However, since combustion air flows from the base end to the top of the vaporized body 121 in the air supply heating passage 125 at the position where the gaseous fuel is ejected, the gaseous fuel and combustion air flow into the gas chamber 110. In the long passage leading to
After being pressurized into the gas chamber 110, the gas is combusted under equal pressure from the gas chamber 110, intensely heating the carburetor 121. As a result, after the occurrence of vaporization combustion, the air heating passage 125
Both the combustion air flowing through the vaporization tube 121 and the gaseous fuel ejected toward the inner peripheral wall surface of the vaporization tube 121 are quickly heated to high temperatures by the heating action of the vaporization tube 121, so that the gaseous fuel does not become liquefied. (It mixes well with combustion air, becomes a more complete warm gas, and is press-injected into the gas chamber 110, allowing stable vaporization and combustion to continue over a long period of time.)

If an appropriate number of gas ejection holes 144' are formed on the inner peripheral surface of the air supply guide 127, a large amount of gaseous fuel can be ejected at any time to maintain a stable state. Perhaps it is because the vaporization combustion can be carried out very well, but during vaporization combustion, low-temperature gaseous fuel is blown against the inner circumferential wall of the vaporization tube 121 over a wide range, causing the vaporization tube 121 to become hotter than necessary. This can prevent burnout and deformation of the vaporizing tube 121.

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 that bulges outward at the center. A bottomed combustion body provided with an annular bulge 104, the combustion body 11
On the inner periphery of the vertical cylinder wall 106, there are many flame holes 10 all around the circumference of the vertical cylinder wall 106.
, 7......, and provided with a recessed combustion chamber 109't in the center of the bottom wall 10B, the combustion disks 105 are stretched at intervals to connect the combustion body 101 and the combustion disks. A gas chamber 110 is formed between the gas chamber 105 and the gas chamber 110.

The recessed combustion chamber 109 described above is formed by a cylindrical wall 111 and a bottom wall 112. An air supply chamber ring 119 having an air supply passage 113 opened in the center is provided on the inner bottom side of the recessed combustion chamber 109, and air is blown inside between the air supply chamber ring 119 and the bottom wall 112 of the recessed combustion chamber 109. A ventilation chamber 114 formed in the turning guide path 115 is installed.

Reference numeral 116 denotes a plurality of swirling blowholes that are open in one direction 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 into the central part of the combustion body 101 from the blowing chamber 117 side, and a vaporizing cylinder whose base end side is open so as to cover the rotating shaft 120 is provided at the tip of the rotating shaft 120. 121 is directly connected.

The open end of the vaporization tube 121 is bent outward to protrude, and this creates a hollow mixed cylinder 122 on the peripheral end surface, and a fuel scattering gap 123 is formed between it and the end of the vaporization tube 121. It must be installed in one piece so that it can be used. 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,
Air heating is formed between the gas nozzle chamber 139, which has a hollow cylindrical interior, and the surface 141 of the air guide body 127, which is inserted and erected so that the upper end opening faces the vicinity of the top of the vaporizing cylinder 121. The base end side of the air heating passage 1250 is connected to the air supply chamber 114 via the air passage 113,
Further, the distal end side is connected to the gas chamber 110 through the inner surface 140 of the air supply guide 121 . 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 1
A hollow fuel diffuser 29 is integrally attached to the inner surface of the top of the vaporizing tube 121, and a fuel scattering gap is provided in an appropriate manner between the inner surface of the vaporizing tube 121 and the upper end surface of the fuel diffuser 129. It is being Reference numeral 130 denotes a fuel supply pipe for feeding fuel to the lower inner surface of the fuel oil diffuser 129, and this fuel supply pipe 130 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 from the fuel diffuser 129 in a thin film along the inner circumferential wall surface of the vaporizer tube 121, and then the fuel is scattered. It is sprayed in fine particles together with combustion air from the gap 123 into the recessed combustion chamber 109 to cause main combustion, and at the same time intensely heats the vaporizing tube 121, evaporates the liquid fuel supplied thereafter, and converts the generated vaporized gas. After being mixed with combustion air to form a mixed gas, it is pressurized into the gas chamber 110 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 10B 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.
These are a plurality of blowholes for secondary combustion air that penetrate through the joint with the attachment 7 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. 138 is a drain pipe.

The air supply guide 127, which is formed in the gas nozzle chamber 139 having a hollow cylindrical shape as described above, has a tip opening formed as a ventilation port 142, and a base end opening formed as a ventilation outlet 143, respectively.

Reference numeral 144 indicates a gas ejection hole formed in an appropriate number on the surface 141 of the air supply guide body 127, through which gaseous fuel is ejected from the gas ejection hole 144 toward the inner circumferential wall surface of the vaporization cylinder 121. Reference numeral 144' designates a suitable number of gas ejection holes formed in the inner surface 14υ of the air supply guide 127, and when the gas ejection holes 144' are opened, a large amount of gaseous fuel can be vaporized and burned.

Reference numeral 145 designates a plurality of gaseous fuel supply pipes connected to the base end side of the air supply guide 1270, through which gaseous fuel is supplied into the gas nozzle chamber 139.

Effects of the Invention In short, since the present invention has the technical means as described above, the volume of the air supply guide body 127 inserted into the vaporization cylinder 121 can be increased to accommodate a large amount of gaseous fuel. By increasing the perforation area of the gas ejection holes 144 and 144', the gas ejection speed of the gaseous fuel can be made constant, and at the same time, since the air supply guide body 127 has a hollow cylindrical shape, the combustion air is blown without blowing resistance. It is possible to supply a predetermined amount of combustion air by circulating it without causing any
The gaseous fuel ejected from the large number of gas ejection holes 144 drilled in the vaporizer tube 121 can be sprayed over a wide range on the inner peripheral wall surface of the vaporizer tube 121, so the vaporizer tube 121 is necessary during vaporization combustion. It is possible to prevent burnout and deformation due to overheating, and at the same time raise the temperature of the gaseous fuel by the heating action from the vaporization cylinder 121. The gaseous fuel and combustion air are heated to high temperature by the heating action of the vaporization cylinder 121 while passing through the gaseous fuel and combustion air are stirred and mixed while flowing through a relatively long passage to form a complete mixture of gases, and the combustion air is heated for a long period of time. The effect is that stable vaporization combustion can be continued over a period of time.

[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.

Claims (1)

[Claims] A vaporizer tube with one end open and a gas chamber communicating with the open end of the vaporizer tube and disposed around the vaporizer tube, wherein the vaporizer tube has openings on both the distal end and the proximal end. A hollow air supply guide whose base end communicates with the gas chamber and whose interior is formed into a gas nozzle chamber is inserted to create an air supply heating passage between the inner circumferential wall of the vaporization cylinder and the outer circumferential wall of the air supply guide. What is claimed is: 1. A gaseous fuel combustion device characterized in that a plurality of gas ejection holes for ejecting gaseous fuel are formed on the surface of the air supply guide.