JPH07119930A - Structure for pot type oil stove - Google Patents

Abstract

PURPOSE:To perform a large flame power regulating width even with a large quantity of generated heat of combustion amount by providing an evaporation tray on a combustion assisting device, opposing an oil feed tube to the tray and providing many secondary combustion air holes in an upper surface of an air duct provided at an outer periphery of a peripheral wall of a pot. CONSTITUTION:An evaporation tray 6 is provided on a combustion assisting device 4, an oil feed tube 7 is opposed to the tray 6, and many secondary combustion air holes 9 are provided in the upper surface of an air duct 8 provided at an outer periphery of a pot 5. A large quantity of the air is supplied from the holes 9 upward and toward the outer periphery of the tray 6, and fuel evaporated by the tray 6 is burned forming yellow flame. Further, the tray 6 is covered with an evaporation tray surface plate 6a to form an evaporation chamber 10 to the tray 6, and evaporated gas jetting hole 6b is provided in the side of the chamber 10 or the plate 6a. Secondary combustion air is supplied from the holes 9a toward the hole 6b and the plate 6a. Thus, secondary combustion can be stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil combustor using a pot, and a combustor having a large combustion control range and a large combustion amount.

[0002]

2. Description of the Related Art A general pot type oil combustor is one in which a large number of air holes are gradually formed in the peripheral wall of the pot, and two or three donut-shaped combustion rings are provided in the pot. No. 15664, etc.), the combustion air is supplied stepwise from the outside of the rising unburned gas, and the yellow flame due to diffusion combustion is raised to burn.

Further, in the diffusion combustion, soot is generated when the combustion balance is broken.
No. 16027 discloses a pot type oil combustor in which an air cylinder is raised in a pot having an air hole, and a flame spreader having a secondary air hole is attached to the air cylinder.

In Japanese Utility Model Publication No. 48-18593, an air cylinder is raised in a pot having an air hole, and a combustible gas guide cylinder is arranged on the outer circumference of the air cylinder. The combustible gas guide cylinder is provided in the upper part of the pot. There is a burner head that communicates with the lower part of the pot, and the refueling pipe is looked into the burner head through the air pipe.The one that suppresses the rise of unburned gas by this type of auxiliary burner is Air and vaporized gas are sufficiently mixed inside the pot, and a blue flame is raised in the vicinity of the uppermost auxiliary combustion device to burn.

[0005]

A pot type oil combustor is one for evaporating and burning petroleum in a pot. A vaporization section and a combustion section are continuous, and a plurality of ring-shaped auxiliary combustion devices are provided. A large amount of air is slowly supplied from around the rising unburned gas, carbon is directly released from the unburned gas, and this carbon burns into diffusion combustion, resulting in a yellow flame. This combustion has the advantage that a large combustion amount can be obtained and that the combustion amount can be easily reduced to about 30% to 40% without changing the air amount. A large amount of soot is generated in the combustion in which the combustion balance is lost.

For this reason, the pot-type combustor by diffusion combustion requires an exhaust stack, and since the exhaust stack needs work to remove soot adhering at the time of ignition / extinction, recently, a disk-shaped pot inside the pot is required. A pot-type combustor that burns with a blue flame that incorporates a premixed combustion method that suppresses the rise of unburned gas by suppressing the rise of unburned gas and thoroughly mixes air and vaporized gas in the pot before it is put into practical use and ignited -Incomplete combustion at the time of extinguishing fires by releasing incomplete combustion gas instead of soot and performing combustion without allowing soot to adhere to the exhaust stack.

Since this combustion reduces the air supply in the premixed portion and supplies a large amount of air in the combustion portion to complete the combustion, the main combustion portion is specified near the uppermost stage auxiliary combustion device. Incomplete combustion gas is generated when the combustion balance is disturbed at the time of ignition or extinguishing, which cannot be combusted in parts. For this reason, the conventional pot-type combustor capable of producing a large amount of heat is mainly used to discharge the exhaust gas generated by using an exhaust stack to the outside, and there has been a lack of widespread use in areas other than cold regions.

The applicant has focused on a pot-type combustor that completely burns during normal combustion from about 10 years ago, and may emit exhaust gas using a premixed combustion method of blue flame into a room ( We are trying to popularize the oil fan heater), but as the exhaust gas is emitted indoors, it is necessary to improve the exhaust performance at the time of ignition / extinction. Therefore, the inside of the pot is preheated and burned at the time of ignition. The temperature has been raised to about the same as the time, and the size of the preheater that can be used is 6000 Kcal / hour to 80.
It was impossible to exceed the calorific value of 00 Kcal / hour. Also,
Since it is a blue flame combustion, in order to completely burn it, the combustion flame must always exist near the uppermost auxiliary combustion device, and it is difficult to reduce the combustion amount to a small combustion and the adjustment range of the heat power is small (1 : 2nd place)

[0009]

The present invention is a pot-type combustion system in which exhaust gas can be discharged into a room and has a capacity of 20,000K.
This is a pot-type oil combustor that has a large calorific value of approx. cal / hour and a heat power adjustment range of about 10: 1.

That is, a primary combustion air hole 1 is provided on the peripheral wall, a preheating / ignition heater 2 and a refueling pipe 3 are provided in the pot 5 at the bottom, and a pot 5 for supporting combustion of a combustion plate or the like is provided inside the pot 5. In a pot-type combustor in which the device 4 is attached and blue flame combustion is performed in the vicinity of the uppermost auxiliary combustion device 4, a vaporization tray 6 is provided on the auxiliary combustion device 4, and the oil feed pipe 7 is seen through the vaporization tray 6 to form a pot. A large number of secondary combustion air holes 9 are provided on the upper surface of the air passage 8 provided on the outer periphery of the five peripheral walls, and a large amount of air is supplied from the secondary combustion air holes 9 toward the outer periphery and the upper side of the vaporization tray 6 for vaporization. The structure is such that the fuel vaporized in the dish 6 burns in a yellow flame.

The upper portion of the vaporizing tray 6 is covered with a vaporizing tray top plate 6a to form a vaporizing chamber 10 between the vaporizing tray 6 and the vaporizing tray 10, and a gas of vaporizing gas is formed on the side portion of the vaporizing chamber 10 or the vaporizing tray top plate 6a. A gas ejection hole 6b is provided from the secondary combustion air hole 9 by providing a gas ejection hole 6b.
Further, the secondary combustion is stabilized by supplying the secondary combustion air to the upper side of the evaporation tray top plate 6a.

Further, the opening ratio of the secondary combustion air holes 9 for supplying the combustion air toward the outer periphery and the upper side of the vaporization tray 6 is set to 80% or more of all the air holes supplied from the air passage 8 to drastically control the heat power. It is what made the width possible.

[0013]

Since the present invention is configured as described above, the pot type combustor for performing the primary combustion can use the pot type combustor for performing the blue flame combustion of the indoor exhaust type as it is.
At the time of combustion with a small heating value of about 500 Kcal / hour to about 3000 Kcal / hour, only primary combustion is performed, and ignition / extinction can be performed without generating incomplete combustion gas as in the conventional indoor exhaust type small pot combustor.

Further, in this primary combustion, the vaporization dish 6 is heated to a high temperature by the heat of combustion, and the periphery of the vaporization dish 6 is in a high temperature atmosphere. Therefore, when a calorific value higher than that of the primary combustion is required, the fuel is immediately vaporized when the fuel is also sent to the vaporization tray 6, and the combustion is started. This secondary combustion does not have a mixing means for the vaporized gas and air and is supplied with a large amount of fresh air from the surrounding secondary air holes 9, so that the vaporized gas becomes high temperature due to diffusion combustion. Carbon is released by the heat of combustion of and the combustion is started by the yellow flame.

Therefore, the secondary combustion by the fuel vaporized in the vaporization tray 6 is started at the same time as the fuel supply, and is immediately extinguished if the fuel supply is stopped. No smoke or incomplete combustion gas was observed during ignition / extinguishing. And, the problem that a large amount of soot is generated at the time of ignition and extinction, which is the biggest drawback of the pot-type combustor due to diffusion combustion, can be overcome, and the exhaust stack is no longer necessary.

Furthermore, since only the primary combustion and the combustion that simultaneously performs the primary combustion and the secondary combustion can be continuously performed, the single combustion of the primary combustion becomes the minimum combustion amount,
Regarding the maximum combustion amount, a calorific value of about the maximum combustion amount of the diffusion combustion type pot combustor (up to 20,000 Kcal / hour in the conventional product) can be expected, and a wide range of thermal power adjustment could be obtained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction will be described with reference to the drawings showing the cross-sections of the essential parts of the embodiments. 5 is a pot forming a vaporization section and a combustion section of the pot type oil combustor, 11 is a combustion air supply fan, 8 is an air passage through which air is sent from the combustion air supply fan 11,
The pot 5 is mounted in the air passage 8. Reference numeral 1 is a primary combustion air hole formed in the peripheral wall of the pot 5, 2 is a preheating / ignition heater provided at the bottom of the pot 5, 3 is an oil supply pipe for supplying oil into the pot 5 from an oil tank (not shown),
When the preheating / ignition heater 2 is energized by the ignition operation and the temperature inside the pot 5 approaches the temperature at the time of combustion, the combustion air supply fan 11 is operated and the oil supply pipe 3 supplies oil into the pot 5. The oil sent to the pot 5 becomes vaporized gas by the preheating / ignition heater 2 and is ignited by the heat of the preheating / ignition heater 2.

Reference numeral 4 denotes an auxiliary combustion device provided so as to smoothly produce a mixed gas while the vaporized gas and the combustion air sent from the primary combustion air hole 1 burn inside the pot 5, and the auxiliary combustion device 4 of the embodiment. Is composed of a disk-shaped blue flame cap 4a arranged in the upper center of the pot 5 and a ring-shaped combustion ring 4b attached to the peripheral wall of the pot 5 below the blue flame cap 4a. The flow of the mixed gas is suppressed by the cap 4a, and a stable premixed gas is obtained.
Completely burns on the side of the blue flame cap 4a.

Reference numeral 6 designates a vaporization dish independently provided in the upper part of the auxiliary combustion device 4 in the pot 5, and the vaporization dish 6 of the embodiment is covered with a vaporization dish top plate 6a. The plate 6a has a gas ejection port 6b composed of holes and slit grooves. Reference numeral 7 denotes an oil feed pipe that is looked into the upper part of the vaporization tray 6, and the oil sent from the oil feed pipe 7 to the vaporization tray 6 heated by the primary combustion is vaporized in a high temperature atmosphere and thus becomes a gas with good combustibility. Start burning.

At this time, when the vaporizing tray top plate 6a is attached to the vaporizing tray 6 and the vaporizing chamber 10 is formed between the vaporizing tray 6 and the vaporizing tray 6, the oil feeding pipe 7 is heated and the oil is fed in the oil feeding pipe 7. Even if the vaporization is performed, the vaporized gas once fills the vaporization chamber 10 and then is blown out from the gas ejection hole 6b, so that the vaporized gas is not ejected from the oil feed pipe 7 toward one side. Combustion is stabilized without uneven flow of vaporized gas.

Reference numeral 9 denotes a secondary combustion air hole formed in the upper surface of the air passage 8 provided on the outer periphery of the pot 5 peripheral wall or in the peripheral wall of the pot 5 above the vaporizing tray 6, and from the secondary combustion air hole 9 to the vaporizing tray. A large amount of air is supplied toward the outer circumference and the upper part of the fuel cell 6, and when the fuel vaporized in the vaporization tray 6 becomes vaporized gas and rises, it receives the air and burns in a yellow flame. Reference numeral 12 is a fin provided in the secondary combustion air hole 9 on the peripheral wall of the pot 5, and the fin 12 guides the combustion air flowing into the secondary combustion section so as to swirl and flow in, and the gas ejection port 6b. The vaporized gas discharged from and the combustion air discharged from the secondary combustion air holes 9 on the peripheral wall of the pot 5 are efficiently mixed, and complete combustion is performed by diffusion combustion by a yellow flame.

It is desirable that the primary combustion of the premixed combustion and the secondary combustion of the diffusion combustion be independently supplied with fuel and air. However, the same combustion air supply fan 11 is used as in the embodiment shown in the figure, and the ratio of the total opening area of the portion X1 of the secondary combustion air hole 9 to the portion X2 of the primary combustion air hole 1 is 2: 8 or less. When the air is supplied from the air passage 8 as described above, since the secondary combustion is the diffusion combustion, the air blown out from the secondary combustion air holes 9 can be passed through when only the primary combustion is performed. It does not hinder the primary combustion, and the combustion ratio can be changed significantly according to the amount of air.

Reference numeral 13 denotes a branch portion for supplying oil to the primary combustion oil supply pipe 3 and the secondary combustion oil supply pipe 7 by sharing a fuel pump (not shown). Reference numeral 14 denotes the branch portion 13 to the vaporization tray 6. Solenoid valve provided on oil pipe 7, 15 from branch 13 to pot 5
This is an orifice provided in the oil supply pipe 3 to the oil supply pipe 3, and the solenoid valve 14 is closed during the primary combustion to send the entire amount of oil supply to the pot 5.

On the other hand, when the primary combustion and the secondary combustion are used together, when the solenoid valve 14 is opened, the fuel to the primary combustion section is reduced by the orifice 15, but the fuel is also sent to the secondary combustion section for combustion. By starting and varying the flow rate of the electromagnetic pump, the combustion amounts of the vaporization tray 6 and the pot 5 both change,
It became possible to adjust the combustion to the same level as the ordinary diffusion combustion pot type combustor above the maximum combustion of the primary combustion, and also to adjust the combustion amount significantly in addition to the combustion adjustment of only the primary combustion.

[0025]

As described above, according to the present invention, the premixing type pot combustor is used for the primary combustion, and the diffusion combustion type pot type combustor is used for the secondary combustion. Since the disadvantage of long fire extinguishing time is compensated by premixed combustion, even a pot-type combustor that performs diffusion combustion can immediately ignite and extinguish, and indoor exhaust is possible for the first time without using an exhaust stack. It is a thing.

Further, the vaporizing tray 6 is combined with the vaporizing tray top plate 6a to form the vaporizing chamber 10 so that the vaporized gas is blown out uniformly from the jet outlet 6b to the entire circumference. Mixing with the air supplied from the air holes 9 was improved, and stable and tall yellow flame was obtained in the diffusion combustion, and the combustion state was improved.

Further, it is possible to use only the primary combustion by the premixed combustion, and the opening ratio of the secondary combustion air holes 9 to the opening ratio of the primary combustion air holes 1 is set to 80% or more of the total air amount, The combustion amount in the secondary combustion can be increased, and a wider combustion adjustment range can be obtained as compared with the minimum combustion amount in the primary combustion.

[Brief description of drawings]

FIG. 1 is a sectional view of a pot type oil combustor showing an embodiment of the present invention.

[Explanation of symbols]

 1 Primary Combustion Air Hole 2 Preheating / Ignition Heater 3 Oil Supply Pipe 4 Auxiliary Combustor 5 Pot 6 Vaporizing Dish 6a Vaporizing Dish Top 6b Gas Jet 7 Oil Feed Pipe 8 Air Pass 9 Secondary Combustion Air Vent 10 Vaporizing Chamber

Claims (3)

[Claims] 1. A pot 5 having a primary combustion air hole 1 on its peripheral wall, a preheating / ignition heater 2 and an oil supply pipe 3 being provided at the bottom, and an auxiliary combustion such as a combustion plate inside the pot 5. In a pot-type combustor in which the device 4 is attached and blue flame combustion is performed in the vicinity of the uppermost auxiliary combustion device 4, a vaporization tray 6 is provided on the auxiliary combustion device 4.
Is provided, the oil feed pipe 7 is seen through the vaporization tray 6, and a large number of secondary combustion air holes 9 are provided on the upper surface of the air passage 8 provided on the outer circumference of the peripheral wall of the pot 5, and vaporization is performed from the secondary combustion air holes 9. A structure of a pot type oil combustor characterized in that a large amount of air is supplied to the outer periphery and the upper side of the dish 6 and the fuel vaporized in the vaporization dish 6 burns in a yellow flame. 2. The vaporizing tray 6 is covered with a vaporizing tray top plate 6a to form a vaporizing chamber 10 between the vaporizing tray 6 and the vaporizing tray 6, and the vaporizing chamber 10 is formed.
6. A gas ejection hole 6b for vaporized gas is provided on the side portion of the plate or on the evaporation tray top plate 6a, and the secondary combustion air is supplied from the secondary combustion air hole 9 toward the upper side of the gas injection hole 6b and the evaporation tray top plate 6a. The structure of the pot type oil combustor described in 1. 3. A secondary combustion air hole 9 for supplying combustion air to the outer circumference and upward of the vaporization tray 6 has an opening ratio of 80% or more of all air holes supplied from the air passage 8. Pot type oil combustor.