JPS62155424A - Combustion device - Google Patents

Abstract

PURPOSE:To prevent the sudden deterioration of combustion characteristics upon weak combustion and obtain a combustion device, good in the combustion characteristics and large in the control range of the amount of combustion, by a methods wherein a control body, shielding a flow control area at a bottom surface, is provided and a communicating port, communicating an air introducing path with the flow control area, is provided on at least one part of the flow control body. CONSTITUTION:A flow control tube 21 is provided with a communicating port 24, therefore, a part of flow shown by white arrow signs (b), which rises through an air introducing path 23, flows into a flow control area 22, which has a negative pressure, as shown by white arrow signs (g). Accordingly, unburnt gas, flowing into the flow control area 22 from a combustion chamber 8, and clean air, flowing thereinto from the air introducing path 23, are mixed and are supplied into the combustion chamber 8 through the air ports 11 of an inner flame tube 6 as shown by black arrow signs (h) to burn them, therefore, combustion is effected without losing an air balance between the side of the inner flame tube 6 and the side of an outer flame tube 7 whereby a red heat part 16 can obtain a good red-heat condition upon strong combustion. When the combustion is reduced to weak combustion, flames drop gradually into the combustion chamber 8 and become the flame (fs) while evaporated gas is reduced remarkably, therefore, the amount of unburnt gas flowing into the flow control area 22 is reduced. Accordingly, the wall surface of the inner flame tube 6 is red-heated to promote the combustion and the combustion is completed with the flame (fs).

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

Conventional technology Conventionally, the combustion equipment for this building is a suction vaporization type combustion equipment used in oil stoves, etc., but this is an internal flame combustion equipment with a large number of air holes 11, as shown in Figure %7. The tip of the wick 1, which is a fuel supply section, is exposed in a combustion chamber 8 formed between an inner flame tube 6, which is a body, and an outer flame tube 7, which is an outer flame body, to vaporize and burn the fuel. Normally, the outer flame cylinder 7 forms a red-hot part 16 with a through hole 17 having a large opening area above the constriction part IS of the outer body, which is the outer body, and the incandescent part 16 has a through hole 17 with a large opening area. The air that entered the inside of the grille 8 through the through hole 17 was mixed and combusted, making the red-hot part 16 red-hot and obtaining radiant heat.

Problems to be Solved by the Invention However, the above configuration has caused the following problems.

In normal strong combustion, as shown in Figure 7, the inner flame tube 6 and the outer flame tube 7
A secondary flame f is formed between the combustion chambers 8 and 8, and the unnatural components that have risen in the combustion chamber 8 are completely combusted, thus exhibiting good characteristics. However, if the exposure height of the lamp wick 1 is lowered to reduce the combustion iit, the flame descends into the flame q8 and is formed like f2. In this case, the flame f that was formed in the air hole 11 and the through hole 17 in the inner flame part is no longer formed above the flame 42.

Conventionally, under such conditions, the exhaust gas characteristics, especially C0/C○
2 was rapidly deteriorating. Although the cause of this has not been clear in the past, the results shown below have revealed that the main cause is the air flow n inside the inner flame section 6.

FIG. 8 shows the A-A' line (i.e., the air passage 20 between the outer cylinder a9 or outer cylinder 7 and the outer flame cylinder 7) and the B-B' line (i.e., the direction of the inner flame) of the conventional combustion device shown in FIG. This is the result of measuring the CO distribution in the height direction at the position (inside 6) during strong and weak combustion. At the position of the A-N line, the constricted part 15 of the outer cylinder 9 during strong twist firing
Above that, the CO concentration increases rapidly and reaches its maximum in the middle upper part.
It decreases again near the upper end, but shows a high value of 500 ppm or more.

However, during strong twist firing, the flame f causes almost complete combustion, resulting in good exhaust gas characteristics. A similar behavior is shown during low roasting, but the CQa degree is low, around 250 ppm near the top. At the B-B@ position, the behavior is the same during both strong combustion and weak combustion, and the CO concentration increases upward, reaching a very high value of over 11,000 pp J near the top even during weak combustion.

From the above results, the flow t' of air and exhaust gas in the Ganyaki equipment is
L is as follows. That is, as shown in FIG. 7, the resulting flow is indicated by a black arrow, but in addition to that, there is a flow as indicated by a broken line arrow. In other words, incompletely combusted exhaust gas leaks from the combustion chamber 8 into the air passage 20 in a flow a, and from the roasting chamber 8 into the inner flame part 6 in a flow b. Among these, flow a easily re-enters the combustion chamber 8 because the aperture ratio of the through hole 17 of the red-hot part 16 is large, and is burned by the flame f2, so during weak combustion, co is a low value near the top of the outer flame tube. shows. However, since the air hole 11 of the inner flame tube 6 is small and the resistance is large, the flow nb does not flow back into the combustion chamber 8 and shows a value as high as CO near the upper end of the inner flame tube 6 even during weak combustion. . Therefore, during weak combustion, if the flame falls into the combustion chamber 8 like f2 and no flame is formed above it, the inner flame tube 6
A high concentration of CO is released from the air holes 11 and 1a at the top of the
Exhaust gas containing 20% is released directly into the atmosphere.

It has become clear that the main reason for the rapid deterioration of CO/CO2 during weak combustion is that the exhaust gas containing high concentrations of co that leaks into the inner flame section 6 is directly released into the atmosphere. Ta.

Therefore, in order to improve CO/CO2 during weak combustion, it is necessary to prevent exhaust gas containing high concentrations of Co from being directly released into the atmosphere. Even when the combustion load in the combustion chamber 8 is reduced and the combustion amount is reduced, a flame is formed above the combustion chamber 8.

However, in this case, there were problems such as the area of the red-hot part 16 becoming small, the red-hot temperature becoming low during strong twist firing, and uneven redness occurring. Further, as the combustion amount was further reduced, the flame eventually fell into the eight causes of combustion chamber, the above-mentioned phenomenon appeared, and the CO/Co2 characteristics deteriorated.

The present invention solves such conventional problems, and aims to provide a combustion device with good combustion characteristics and a wide adjustment range of combustion h1 by suppressing the rapid deterioration of combustion characteristics during weak combustion. The porpose is to do.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention has a combustion system that extends inside the inner flame from near a position facing the removal material supply section to a position below the upper end of the inner flame. , and is provided with a fluid control whose bottom surface shields a control area formed between the inner flame body and the inner flame body, and at least a part of the fluid control is provided with a communication port that communicates the air flow path with the control area.

Effect of the present invention With the above-described configuration, the present invention prevents unburned gas from flowing into the air introduction passage, introduces air from the air passageway into the control area, mixes it with the unburned gas, and discharges it from the air hole of the inner flame body. By supplying the fuel to the combustion chamber and burning it efficiently, combustion can be carried out without disturbing the air balance between the inner flame body side and the outer flame body side.

Embodiments Hereinafter, embodiments of the present invention will be described based on fan-shaped drawings.

In Fig. 31, numeral 1 is a cylindrical lamp wick which is a fuel supply part, and is set to be vertically movable between an inner wick tube 2 which is an inner wick body and an outer wick tube 3 which is an outer window body. The upper ends of the inner core cylinder 2 and the outer window @3 form an inner fire pan 4 and an outer fire pan 5, respectively.
An inner flame tube 6, which is an inner flame body, and an outer flame tube 7, which is an outer flame body, are placed. During combustion, the tip of the wick 1 is exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where the fuel is vaporized. Reference numeral 9 denotes an outer cylinder a, which is an outer body a, in which the inner flame cylinder 6, the outer flame cylinder 7, and the outer cylinder a9 are arranged in order from the inside in a substantially same circular shape, and are integrated by a fixing pin 10. 11
are a large number of air holes provided in the inner flame @6 and the outer flame cylinder 7. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube 6. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube. A red-hot part 16 is formed in the outer flame tube 7 above the throttle part 15 of the outer @ 9, and a through hole 17 with a large opening is provided. An outer cylinder 18 is an outer body made of a transparent material such as glass, and is placed on the outer cylinder a9. 19 is a top 7 frame, which is placed on the upper end of the incandescent part 15 so as to shield the upper end of the air passage 20 between the incandescent part 15 (!-outer cylinder b19), and fixes the outer part b18.21 is a flow control tube that is a fluid control installed in the internal force of the inner flame tube 6, and extends from near the tip of the wick 1 to a position below the upper end of the inner flame tube 6, and
It is provided so that the control area 22 formed between the two is shielded by its bottom surface. 23 is an air introduction path.

Reference numeral 24 denotes a communication port provided in the flow control tube 21 so as to communicate the Luli region 22 and the air introduction path 23.

In the above configuration, when the lamp wick 1 is ignited, combustion starts,
High-temperature combustion gas from combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6,
The air is supplied into the combustion chamber 8 through the air hole 11 of the outer flame cylinder 7 and the matching hole 17 of the red-hot part 16, and combustion continues, and during hard twist firing,
A flame fr is formed as shown in FIG. Looking at the flow of combustion exhaust gas and air at this time, the flow within the air passage 20 is almost the same as in the conventional example shown in FIG. The air supplied from inside the inner flame tube 6 is divided into a white arrow 1al which is supplied from below the single flow tube 21 to the vicinity of the lamp wick 1, and a white arrow 1al which ascends the air introduction road. The flow indicated by the white arrow C reaches the upper part of the inner flame tube, and is supplied to the combustion chamber 8 and the upper part through the air hole 11 and the vent hole 13 as shown by the white arrow C. In addition, a part descends to the control area 22 as shown by the white arrow d, and a relatively lower part of the air hole 11
It is also supplied to the combustion chamber 8 from. Further, the fuel that has been refined by the flow of white arrow a becomes a mixed gas with air and rises in the combustion chamber 8 mainly as shown by arrow e. However, due to the flow white arrow c + d in the air introduction path 23, the control area 22
Since the pressure inside becomes negative, a part of the mixed gas flows into the control area 22 as shown by the black arrow f and rises.

Therefore, the control area 22 is filled with gas.

On the other hand, since the flow control tube 21 is provided with the communication port 24, a part of the flow rising in the air introduction passage 23 as indicated by the white arrow g is transferred into the control region 22, which has a negative pressure, as shown by the white arrow g. Inflow. Therefore, in the control area 22, unburned gas flowing in from the combustion chamber 8 and clean air flowing in from the air introduction passage 23 are mixed, and as shown by the black arrow, the air hole 11 of the inner flame tube 6 enters the combustion chamber e. Since the combustion air can be spread over a wide range of the inner flame tube 6, combustion can be carried out without disturbing the air balance between the inner flame tube 6 and the outer flame tube 7. Therefore, during strong firing, the red-hot portion 16 can also obtain a good red-hot state. Further, during strong twist firing, a large amount of unresolved gas flows into the control area 22, so a portion of the unresolved gas flows out into the air introduction passage 23 as indicated by the broken line arrow (1). However, considering the pressure balance between the control area and the air introduction passage 23, there is only a small amount of outflow, and the air is diluted by a large amount of air, so the inside of the air introduction passage 23 is in a clean state with a low CO concentration. is being treated by Moreover, even if some unburned gas exists here, it is burned by the flame fr above the combustion chamber 8, so there is no problem in terms of combustion durability.

Next, when the height of the wick 1 is lowered to produce weak combustion, the flame gradually enters the combustion chamber 8 and becomes a flame fs. The flow in this case is the same as that during strong twist firing, but since the amount of vaporized gas is significantly reduced, the amount of gas flowing into the control area 22 is also reduced. Therefore air white arrow +dl and (f
The mixing area with unburned gas moves downward, and the middle and lower part of the control area 22 becomes a good mixing bright area, forming a floor flame in this area and making the wall curve of the inner flame cylinder 6 red hot to promote combustion. , the flame fs'T formed above it: completely burns out the open fire◇
In addition, during weak combustion, the amount of unused gas flowing into the control area 22 decreases, so almost no unused gas flows out into the air introduction passage 23 as shown by the broken line arrow (1), and the air holes 11 above the flame fs and I was shocked to find that the air vented from the vent 13 contained almost no CO.
The exhaust gas characteristics (CO/CO2) become better.

That is, according to this embodiment, by mixing unburned gas and air in the control area 22 by four people and efficiently supplying the mixture to the combustion chamber 8, the air balance between the inner flame cylinder 6 side and the outer flame @ 7 side is maintained. Since combustion is performed without destroying the flame, it is possible to obtain a good glowing state during strong twist firing, and during weak combustion, the upper part of the inner flame cylinder 6 contains almost no unburned gas, which improves the exhaust gas characteristics. can be improved. Therefore, it is not necessary to reduce the combustion load in the combustion chamber 8 or to lower the combustion height in order to improve the exhaust gas characteristics during weak combustion as in the conventional case.

FIG. 3 shows the C-C' line (control area 22) of the embodiment shown in FIG.
) and the DD' line (air introduction path 23), the Co concentration distribution was measured at weak vE and during firing.

At the C-C' line position, high concentration of CO flows from the lower end of the flow control tube 21.
is detected, but it gradually becomes thinner near the center of the side stream rffJ21, and is considerably thinner at the upper end of the inner flame direction 6.
It can be seen that the area above the inner flame tube 6 is in a clean state with a low CO concentration. It can be seen that at the DD' line position inside the flow control tube 21, the COa degree is low over the entire area, and clean air is supplied.

From the above results, it can be seen that the exhaust gas characteristics above the inside of the inner flame cylinder 21 are significantly improved compared to the conventional example.

Figure 4 shows the amount of combustion - CO/CO for this embodiment and the conventional example.
These are the results of measuring two characteristics. In the conventional example (broken line), the CO/CO2 value rises rapidly as the combustion intake is reduced,
Although the exhaust gas characteristics have deteriorated, in this example, even if the combustion rate is reduced, CO/CO2 is maintained at 0.002 or less, and the characteristics have been significantly improved, and the effects of the present invention can be seen. is clear.

In the embodiment of the first quotient, a large number of small holes are provided in the wall surface of the side stream @ 21 as the communication ports 24, but the holes may be elongated vertically or horizontally. In addition, as shown in Fig. 5, 1Iil flow direction 21
A structure in which a wire mesh 25 or the like is provided in a part of the flow control tube 21 or a structure in which a raised portion 26 is formed in the flow control tube 21 as shown in FIGS. 6a and 6b may be used. The case shown in FIG. 6a is an example in which a raised portion 26 is provided at the upper end of the control area 22, and the case shown in FIG. 6 is an example in which a raised portion 26 is provided at the lower end of the air introduction passage 23. Figure 6 a, b
According to the structure shown in FIG. 2, the effect of preventing gas from flowing out due to the flow indicated by the broken line arrow i11 in FIG. 2 can be obtained.

Further, in the above embodiments, a cylindrical combustion device was used, but a flat structure may also be used. (Although a lamp wick is used as the fuel supply unit, it may also be a method of supplying gaseous fuel, or a method of supplying liquid fuel vaporized by another vaporization means.

Effects of the Invention As described above, the combustion apparatus of the present invention provides the following effects.

(1) It extends from the upper end of the inner flame body to the lower neck of the inner flame body from near the position facing the heat supply part, and shields the control area formed between the inner flame body and the inner flame body with its bottom surface. Since the control fluid is provided with a communication port that communicates the control area and the air introduction path, the control area is negatively affected by the air flow that rises through the air introduction path and is supplied above the inner flame body. Unburnt gas is introduced from the combustion chamber and air is introduced from the air introduction path. Therefore, the control area is filled with a mixed gas containing a high concentration of CO, but this mixed gas hardly flows out into the air introduction passage, and the air intake passage is protected by a clean air flow.
The mixed gas in the 11 basin is separated, and clean air is supplied above the inner flame body.

(2) In the III region, the pre-gas and air are mixed and re-supplied uniformly into the combustion chamber, so the inner flame body is wide.
Combustion can be efficiently promoted throughout the enclosure.

Therefore, combustion can be performed without destroying the air balance between the outer flame body side and the inner flame body side, so that a good red-hot state can be obtained during strong twist firing.

(3) In the controlled area, the gas and air are mixed together, but during weak combustion, a good mixed state is formed at a certain height of the inner flame body, and the A flame hold is formed in the air holes of the inner flame body, making the inner flame body wall red hot and promoting combustion. Furthermore, the flame formed above completes the combustion.

(4) The flow of clean air supplied to the inner flame prevents the gas from leaking into the inner flame.

Due to this shielding effect, the upper circular part of the inner flame body contains almost no gas, so even if the flame falls into the combustion chamber during weak combustion, high concentration of CO is directly released into the atmosphere from the air holes and ventilation holes of the inner flame body. It will not be released.

As a result of the above effects, it is possible to obtain a good red-hot state during strong combustion, significantly improve exhaust gas characteristics during weak combustion, and obtain a combustion device with good combustion characteristics and a wide combustion adjustment range.

[Brief explanation of drawings]

Figures 3 and 4 are a'1 for explaining the effects of the device.
' is a cross-sectional view of the main part, and FIG. 8 is a characteristic diagram of a conventional combustion device. 1... Forest supply department, 6. Inner flame body, 7... Outer flame body,
8... Combustion box, 9 - External body, 11 - Air hole, 21
- Fluid control area, 22... Control area, 23... Air rod inlet path, 24... Communication port. Name of agent: Patent attorney Toshio Nakao and 1 other person
-Toshi /I -Air eave 6- Inner cabinet
21- Kai 1bo 7- Outer flame 22- Sho I basin 8- Area boundary room 23- F Paper introduction path Sea Outer drawer 24- Entrance port Figure 1 Figure 2 Figure 3 Figure 5 (a) ( b)

Claims (1)

[Claims] an outer flame body having a large number of air holes; an inner flame body having a large number of air holes arranged outside the outer flame body; an outer body located outside the outer flame body; a fuel supply section set at the lower end of the combustion chamber formed between the inner flame bodies; and a fuel supply section disposed inside the inner flame body and located below the upper end of the inner flame body from near a position facing the fuel supply section. a fluid control member that extends to the inner flame body and blocks a control area formed between the internal flame body and the inner flame body with its bottom surface; and an air introduction passage formed in at least a portion of the fluid control member inside the fluid control member. A combustion device including a communication port that communicates the control area.