JPH0567842B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides the following features: even when a large amount of the obtained mixed gas is subjected to fumarole combustion from a combustion disk disposed within a combustion body, the combustion disk is The present invention relates to a vertical vaporizing burner that prevents the bottom wall surface from being rapidly burnt out due to red-hot heating due to the hot air of a combustion flame, thereby allowing good vaporizing combustion to continue for a long period of time.

[Conventional technology] Conventionally, in order to increase the amount of combustion,
Even if the diameter of the combustion tube is made considerably large,
A vaporizing burner that can reliably perform starting ignition of raw fuel, quickly transition from raw combustion to vaporizing combustion, and stably continue large-capacity vaporizing combustion was developed prior to the filing of this application, for example, in the 1970s. This is known as shown in Japanese Patent No. 54033, and will be explained using FIG.

That is, a combustion disk 2 having a large number of flame holes is provided on the inner bottom side of a flat combustion tube 1 to form a gas chamber 3 between the combustion tube 1 and the combustion disk 2. A vaporizing cylinder 5 provided with a fuel scattering gap 6 is rotatably positioned in the central open part 4 of the chamber 3 to form a gas ejection passage 7 between the central open part 4 and the vaporizing cylinder 5. An annular ignition wall 8 is erected on the combustion plate 2 at a position near the outside of the passage 7, which is higher than the set position of the fuel scattering gap 6.

[Problems to be Solved by the Invention] By the way, in the above-mentioned known vaporizing burner, combustion is possible in which a large number of nozzle holes are drilled only on the entire circumference of the cylinder wall, without punching nozzle holes on the flat surface of the bottom wall inside the fuel cylinder. When a gas chamber is provided between the combustion tube and the combustion disk, and the resulting mixed gas is combusted through a large number of flame holes drilled around the entire circumference of the cylinder wall, The flat surface of the bottom wall of the combustion disk was heated to a red hot temperature more than necessary by the rising combustion hot air, and was quickly burnt out, resulting in the problem that stable vaporization combustion could not be continued for a long period of time.

The present invention provides a method to prevent the combustion disk from burning even when the obtained mixed gas passes through the gas chamber and is combusted inward from the entire periphery of the cylindrical wall of the combustion disk disposed within the large-diameter combustion body. The flat surface of the bottom wall is heated red hot more than necessary due to the hot combustion air rising up from the flames, and is quickly burnt out. The purpose of the present invention is to provide a vertical evaporative burner that can prevent combustion by using combustion air, promote live combustion and increase the amount of combustion when starting the burner, and continue good evaporative combustion over a long period of time. There is.

[Means for Solving the Problems] In order to achieve the above object, in the vertical vaporizing burner of the present invention, a large number of jets are installed around the entire circumference of the cylinder wall in the combustion body, which is a large-diameter bottomed cylinder with an open upper end. A combustion disk with a flame hole bored and a recessed combustion tube is arranged in the center of the bottom wall to form a gas chamber between the combustion body and the combustion disk, and a gas chamber is provided in the recessed combustion tube. In the carburetor cylinder, which is rotatably disposed through a communicating cold air fumarole gap, and whose open side is recessed, the carburetor cylinder is installed at the open end of the carburetor cylinder between the inside of the recessed combustion cylinder and the outside of the fumarole chamber. A fume guide tube in which a fuel scattering plate provided at the top of the mixed cylinder is housed is provided, and between the recessed combustion tube and the fume guide tube, the base end side is connected to the fume chamber, and the discharge side is connected to the fume chamber. It has a fumarole channel that faces onto the bottom wall of the board.

In addition, in order to promote live combustion in the recessed combustion cylinder, auxiliary blowholes are bored in the lower circumferential wall of the blower guide tube to inject some of the cold air flowing through the blower passage into the blower guide tube. It is.

In addition, in order to increase the amount of vaporized combustion, an upwardly directed auxiliary flame hole is opened in the bottom wall of the jet guide tube, the base end of which passes through the jet passage and is connected to the gas chamber.

[Function] First, when starting combustion, the carburetor 119 is rotated at high speed and combustion air is blown into the carburetor 119 and the blast chamber 114. Then, after a part of the combustion air is pressurized into the gas chamber 110 through the inside of the vaporization cylinder 119, it is passed through the numerous flame holes 107.
A part of the combustion air that is injected into the combustion body 101 from .
While the other combustion air is injected into the jet pipe 124, the other combustion air passes through the jet pipe 125 from the jet chamber 114.
From the overhanging edge 126' of the discharge side 126, the combustion disk 1
It ejects along the bottom wall 108 of 05, and the combustion disk 105
Perhaps because the bottom wall 108 of the combustion air is actively cooled by the combustion air, a portion of the combustion air passing through the blowhole passage 125 and a portion of the combustion air pressurized into the gas chamber 110 flow through the auxiliary blowholes 127 and Auxiliary flame hole 12
8 into the fume guide tube 124. Under this condition, if fuel is supplied to the inner surface of the rotating carburetor cylinder 119, the fuel will be diffused into a thin film and become fine particles from the peripheral edge of the fuel scattering plate 121 provided at the open end. It is ejected into the fume guide tube 124, ignited by the ignition action, and is rapidly burned alive by the replenishing action of combustion air ejected from the cold air fume gap 123, auxiliary blowholes 127, and auxiliary flame holes 128.

When a raw combustion flame is generated in the jet guide tube 124, the entire vaporization tube 119 is efficiently heated by the rising raw combustion flame, and the temperature inside the vaporization tube 119 is quickly raised to the temperature at which vaporization occurs.

Therefore, thereafter, the supplied fuel is quickly evaporated and vaporized while being diffused and transferred along the inner surface of the vaporization tube 119, and the vaporized gas generated is stirred and mixed with the combustion air to become a complete mixed gas. Gas chamber 110
After being press-fitted into the interior, the gas is injected all at once from the numerous nozzle holes 107 and the auxiliary nozzle holes 128 under a constant pressure condition, causing the vaporized combustion flame to rise upward.

As described above, when the fuel changes from a raw combustion state to a vaporization combustion state, the bottom wall 108 of the combustion disk 105 becomes red hot due to the upwardly flaming hot air, and is burned out.

However, the bottom wall 108 of the combustion disk 105
On the flat surface, air is blown from the ventilation chamber 115 through the supply cylinder 116 into the fumarole chamber 114, and further into the fumarole chamber 11.
4, combustion air for cooling is ejected along the bottom wall 108 of the combustion disk 105 through the jet passage 125 provided between the concave combustion tube 109 and the jet guide tube 124. The combustion flames rising on the surface of the wall 108 are quickly blown away by the combustion air, and at the same time are completely combusted by the replenishing action of the combustion air, and are quickly cooled down by the jetted cooling combustion air. This allows stable vaporization and combustion to continue over a long period of time without being burnt out due to red-hot heating due to combustion hot air.

[Embodiments] The present invention will be described with reference to various preferred embodiments shown in the accompanying drawings.

In FIGS. 1 and 2, 101 has a large-diameter 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. It is a bottomed combustion body provided with an annular bulge 104, and on the inner periphery of the combustion body 101, a large number of flame holes 107 are provided around the entire circumference of a vertical cylindrical wall 106.
The combustion disks 105 having a hole formed therein and a recessed combustion tube 109 facing downward in the center of the bottom wall 108 are installed at intervals, and a gas chamber 110 is formed between the combustion body 101 and the combustion disk 105. Form.

The recessed combustion tube 109 is formed by a tube wall 111 and a bottom wall 112.
An open part 113 is opened in the center of. 11
Reference numeral 4 denotes a hollow annular fume chamber installed around the open end of the open portion 113, and the fume chamber 114 is connected to a blowing chamber 115 adjacent to the annular bulging portion 104 side of the combustion body 101. Multiple air supply pipes 116...
..., and a cold air blow window 117 is opened in the inner cylindrical wall of the blow chamber 114. 118 is the combustion body 101 from the ventilation chamber 115 side.
The rotating shaft 118 is a rotating shaft inserted toward the center thereof, and a vaporizing cylinder 119 whose proximal end is open is directly connected to the distal end of the rotating shaft 118 so as to cover the rotating shaft 118. The open end of the vaporization cylinder 119 is bent outward and protrudes, and this forms a fuel scattering plate 12 which is integrally provided at the upper end of the mixed cylinder 120, which has a hollow shape on the peripheral end surface.
1 and the end of the vaporizing cylinder 119, there is a fuel scattering gap 12.
2 are integrally attached to form the same.

123 is the upper part of the fumarole chamber 114 and the vaporization cylinder 119
It is an annular cold air jet gap formed between the mixed cylinder 120 attached to the open side end of the cold air jet gap 123, and the base end side of the cold air jet gap 123 is passed through the cold air jet window 117 and the gas chamber 110, Only cold air is blown into the recessed combustion tube 109. Therefore, the carburetor 119 is communicated with the gas chamber 110 through the open portion 113, and the open side of the carburetor 119 is recessed into the recessed combustion chamber 109.

124 is the inside of the recessed combustion cylinder 109 and the fumarole chamber 1
14, and a fuel scattering plate 121 provided on the upper part of the mixed cylinder 120 attached to the open end of the carburetor cylinder 119 is housed in the jet cylinder 124. As well as positioning
The proximal end side is connected to the fume chamber 114 between the recessed combustion tube 109 and the fume guide tube 124, and the discharge side 12 is connected to the fume chamber 114.
6 facing the bottom wall 108 of the combustion plate 105 is formed, and a part of the combustion air blown from the blowing chamber 115 into the blowing chamber 114 is transferred from the blowing chamber 114 to the blowing hole 125. Through the combustion plate 105
This prevents the bottom wall 108 from being overheated and burnt out, and achieves complete combustion through the blow-off action of combustion flames and the replenishment action of combustion air.

Therefore, on the discharge side of the jet guide cylinder 124, an overhanging edge 126' is provided which is bent approximately parallel to the bottom wall 108 so that the cooling combustion air is accurately blown onto the bottom wall 108 surface. It is provided. 127 and 128
are a plurality of auxiliary fumaroles and auxiliary flame holes opened in the lower part and bottom wall of the cylinder wall of the fumarole guide tube 124, respectively, and from these auxiliary flame holes 127... and auxiliary flame holes 128... The injected combustion air can promote live combustion when starting the burner, and can increase the amount of combustion.

Reference numeral 129 denotes a blower tube whose bottom side is attached to the end of the communication port 130 that opens at the center of the annular bulging portion 104, and whose upper end opening faces the position near the top of the vaporizer tube 119, and which is inserted and erected. , 131 is a hollow fuel diffuser integrally attached to the inner surface of the top of the vaporizer tube 119, and a fuel scattering gap of an appropriate size is provided between the inner surface of the vaporizer tube 119 and the upper end surface of the fuel diffuser 131. is provided.

132 is a fuel supply pipe for feeding fuel to the lower inner surface of the fuel diffuser 131.

Reference numeral 133 designates a plurality of blowholes for secondary combustion air that penetrate through the joint between the mounting flange 134 provided on the front end side of the combustion body 101 and the mounting flange 135 provided on the front end side of the combustion disk 105; 137 is a jet guide ring attached to the jet chamber 114 facing the cold air jet gap 123;
This flame stabilizing ring is attached so that the free end side is bent inward over the inner periphery of the flame stabilizing ring.

138 is a drain pipe.

Note that the combustion body 101 according to the present invention has a rectangular shape,
It may be formed into a circular, oval or other arbitrary shape. Furthermore, a large number of nozzle holes 107 can also be bored on the bottom wall 108 of the combustion disk 105 to increase the amount of combustion.

In the second embodiment shown in FIGS. 3 and 4, the cooling combustion air flowing through the jet duct 125 is ensured to flow along the bottom wall 108 of the combustion disk 105. A vaporizing burner that prevents the bottom wall 108 surface from being overheated and burnt out by hot combustion air so that good vaporizing combustion can be continued for a long period of time, and in order to easily achieve the above objects, A bottom wall 1 is installed on the tip side of the fume guide tube 124.
08, the fume guide plate 139 is attached so as to form a fumarole passage 125' whose base end communicates with the fumarole passage 125 and whose surrounding discharge side 140 faces a position substantially near the terminal end of the bottom wall 108. The configuration other than
This is the same as the vaporizing burner of the embodiment.

[Effects of the Invention] In short, the present invention has a large diameter bottomed cylindrical combustion body 101 with an open upper end, in which a large number of flame holes 107 are bored all around the cylindrical wall 106, and a large number of flame holes 107 are formed in the center of the bottom wall 108. A combustion disk 105 equipped with a recessed combustion tube 109 is arranged to form a gas chamber 110 between the combustion body 101 and the combustion disk 105, and in the recessed combustion tube 109,
Even if the open side of the carburetor 119, which is rotatably disposed through the cold-air jet gap 123 communicating with the fumarole chamber 114, is retracted, there is no difference between the inside of the recessed combustion tube 109 and the outside of the fume chamber 114. A jet guide tube 124 is provided between the recessed combustion tube 109 and the jet guide tube 124, in which the fuel scattering plate 121 provided at the top of the mixed cylinder 120 attached to the open end of the carburetor tube 119 is accommodated. There are jet passages 125 and 125' whose base ends are connected to the jet chamber 114 and whose discharge sides 126 and 140 face the bottom wall 108 of the combustion disk 105. Even when the diameter of the cylinder is significantly larger than that of the cylinder 124 to increase the amount of combustion, combustion air is effectively injected into the jet guide tube 124 to automatically convert the fuel into vaporized combustion rather than raw combustion. This makes it possible to stably continue large-capacity vaporization combustion over a long period of time, and actively prevents the bottom wall 108 of the combustion disk 105 from being overheated and burnt out by the rising hot air of combustion. In order to ensure stable continuation of good vaporization combustion over a long period of time, a portion of the cold air flowing through the jet channel 125 is forced into the jet guide pipe 124 at the lower peripheral wall of the jet pipe 124. Auxiliary fumarole 12
7, and an auxiliary flame hole 128 is bored in the bottom wall of the fume guide tube 124 to blow out a part of the vaporized gas into the fume guide tube 124.
By increasing the amount of combustion air supplied into the combustion chamber 24, it is possible to promote raw combustion when starting the burner, and to achieve complete combustion of the mixed gas and increase the amount of combustion after transition to vaporization combustion. .

[Brief explanation of the drawing]

The drawings show various embodiments of the vertical vaporizing burner 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 a partially cutaway side view. FIG. 4 is a vertical sectional front view of a vertical vaporizing burner according to a second embodiment, FIG. 4 is a plan view thereof, and FIG. 5 is a vertical sectional front view of a conventional vaporizing burner. 101... Combustion body, 105... Combustion disk, 106
... The cylinder wall, 107 ... Flame hole, 108 ... Bottom wall, 109 ... Concave combustion tube, 110 ... Gas chamber,
114... fumarole chamber, 115... ventilation chamber, 119...
... vaporization cylinder, 120 ... mixed cylinder, 121 ... fuel scattering plate, 123 ... cold air fume gap, 124 ... fume guide tube, 125, 125' ... fume channel, 126,
140...Discharge side, 127...Auxiliary blowhole, 12
8...Auxiliary flame hole.

Claims (1)

[Scope of Claims] 1. A combustion plate having a large-diameter bottomed cylindrical combustion body with an open upper end, which has a large number of flame holes bored all around the cylindrical wall, and a recessed combustion tube in the center of the bottom wall. A gas chamber is formed between the combustion body and the combustion disk, and the open side of the carburetor cylinder, which is rotatably arranged, is inserted into the recessed combustion cylinder through a cold air jet gap leading to the fume chamber. A blower guide tube is arranged between the inside of the recessed combustion tube and the outside of the fume chamber, in which a fuel scattering plate provided at the upper part of the mixed cylinder attached to the open end of the carburetor tube is housed. Further, a vertical jet duct is provided between the recessed combustion tube and the jet guide tube, the base end of which is connected to the jet chamber, and the discharge side of which faces the bottom wall surface of the combustion disk. Type vaporizing burner. 2. The vertical vaporizing burner according to claim 1, wherein an auxiliary blowhole is bored in the lower circumferential wall of the blowhole guide tube to blow a part of the cold air flowing through the blowhole into the blowhole guide tube. 3. The vertical vaporizing burner according to claim 1, wherein the bottom wall of the fume guide tube has an upwardly directed auxiliary flame hole whose base end passes through the fume passage and is connected to the gas chamber.