JPH1194229A - Combustor and combustion method for animal or plant oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize generated thermal energy effectively by supplying animal or plant oil to an atmosphere preheated up to the thermal decomposition temperature thereof or above and thermally decomposing the animal or plant oil before being burnt. SOLUTION: An animal or plant oil combustor, i.e., a kitchen range 1, comprises a range body 3 and a tank 5, a torch burner 9, and a control board 11. When a starting switch on the control board 11 is turned on, a fan 33 is started to supply high pressure gas to a combustion chamber 19. A gas flow rate regulation valve 43 is then opened fully and high combustion takes place in the burner 9. When the temperature detected by a temperature sensor exceeds 600 deg.C, the gas flow rate regulation valve 43 is restricted and the burner 9 is switched to low combustion. At the same time, waste animal or plant oil 27 is fed out from the tank 5. Consequently, the waste animal or plant oil 27 mixed with high pressure air is sprayed into a preheated container 15 where it is heated up to 600 deg.C or above and burnt completely. After combustion is started, it is controlled to be held between 600-800 deg.C in order to prevent overheat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burning animal and vegetable oils and a device for burning animal and vegetable oils, and more particularly to the effective use of heat energy generated by the disposal of waste oil of animal and vegetable oils at the same time. The present invention relates to an animal and vegetable oil burning method and an animal and vegetable oil burning apparatus.

[0002]

2. Description of the Related Art Today, as the use of animal oils, vegetable oils, and mixtures thereof increases, the amount of animal and vegetable waste oils left after their use also increases, and their processing is troubled. For example, some of the animal and vegetable waste oil left after using cooking oil in fried food cooking, paints, fatty acids, soap,
Although it is reused as various raw materials such as feed, most of it is burned to combustible garbage after being absorbed into oil-absorbing paper or solidified with a solidifying agent from the viewpoint of processing costs, and then subjected to incineration. Or, as it is, it is washed away in rivers and sewers or deposited in landfills, causing environmental problems such as river and soil pollution and sewer pollution.

[0003] As a method of reusing animal and plant waste oils, in addition to the above, use of fuel has been proposed. However,
Animal and plant waste oil is a mixture of glycerin and fatty acids. Unlike mineral oil (gasoline, kerosene, heavy oil, etc.), which has different pyrolysis temperatures, it is the same method as mineral oil. If it is burned, the black smoke, dust, odor and the like will be generated. In particular, used edible oils are mixed with various animal and vegetable oils and impurities, and the initial components are deteriorated by reactions such as oxidation, polymerization, and hydrolysis. Even if the oil is of the same origin, it is in a multiphase state with considerable variation in the pyrolysis temperature.

[0004] Therefore, in order to effectively use the waste oil as animal fuel, a method for easily burning such animal and plant waste oil has been sought. For example, a method has been proposed in which methanol, kerosene, light oil, heavy oil, or the like is mixed as auxiliary combustion with animal and plant waste oil to facilitate combustion (Japanese Utility Model Laid-Open No. 56-112441, Japanese Patent Publication No. 7-107442). However, this method consumes a large amount of unused valuable resources in the treatment of animal and vegetable waste oils, so that the treatment costs are extremely high and cannot be completely burned in spite of the high treatment costs. , Soot and odors are generated. Also,
A method has been proposed in which animal and vegetable waste oil is heated to reduce its viscosity to facilitate combustion (Japanese Patent Application Laid-Open No. 52-34577). However, it is not possible to completely burn animal and vegetable waste oil simply by lowering the viscosity. It produces black smoke, dust and bad smell. Against this background, there has been a strong demand for the development of a method and apparatus that can efficiently burn animal and plant waste oil as fuel. In addition, since the demand for heat energy is increasing year by year, it is also desired to develop a method and apparatus capable of efficiently obtaining heat energy.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a method for burning animal and vegetable oils capable of completely burning animal and vegetable oils without increasing costs. It is an object to provide an oil combustion device. Further, another object of the present invention is to provide an animal and vegetable oil combustion device capable of effectively utilizing heat energy generated by combustion.

[0006]

Means for Solving the Problems In order to achieve this object, the present inventors have made intensive studies and found that animal and plant waste oil is a mixture of a plurality of components having different thermal decomposition temperatures. Complete combustion of a mixture of multiple components with different thermal decomposition temperatures means that all components are decomposed, in other words, mixing heavy oil etc. as in the method mentioned in the section of the prior art. Even if one of the contained components does not reach the decomposition temperature even if the viscosity is lowered by increasing the temperature or increasing the temperature, it is found that complete combustion does not take place. An animal and vegetable oil burning method and an animal and vegetable oil burning device that can achieve combustion have been proposed. The following is the invention proposed in this specification.

The first aspect of the present invention is a method for burning animal and vegetable oils, comprising supplying an animal and vegetable oil to an atmosphere preheated to a temperature higher than its thermal decomposition temperature, pyrolyzing the oil, and burning it.

According to a second aspect of the present invention, in the method for burning an animal or vegetable oil according to the first aspect, the atmosphere for supplying the animal or vegetable oil is heated to a temperature equal to or higher than a temperature serving as an ignition source of the animal or vegetable oil. This is an animal and vegetable oil burning method.

A third aspect of the present invention is the animal or vegetable oil burning method according to the first or second aspect, wherein the temperature of the atmosphere for supplying the animal or vegetable oil is 370 ° C to 1500 ° C. It is.

[0010] The invention of claim 4 is the animal and vegetable oil burning method according to any one of claims 1 to 3, wherein the animal and vegetable oil is mixed with mineral oil.

The invention according to claim 5 is characterized in that the combustion chamber, heating means for heating the combustion chamber so that the atmosphere in the combustion chamber is equal to or higher than the thermal decomposition temperature of the animal and vegetable oil, and that the animal and vegetable oil is supplied to the combustion chamber And an animal and vegetable oil supply device for supplying oil to the animal and vegetable oil.

According to a sixth aspect of the present invention, in the animal and vegetable oil burning apparatus according to the fifth aspect, a temperature sensor for detecting a temperature of an atmosphere in the combustion chamber, and the animal and plant in response to the temperature detected by the temperature sensor. Control means for controlling the supply of animal and vegetable oil by the oil supply means.

According to a seventh aspect of the present invention, in the animal and vegetable oil combustion apparatus according to the sixth aspect, the control means supplies the animal and vegetable oil such that the atmosphere in the combustion chamber is equal to or higher than an ignition source of the animal and vegetable oil. And an animal / vegetable oil burning device characterized by controlling the oil pressure.

According to an eighth aspect of the present invention, there is provided the animal or vegetable oil burning apparatus according to the fifth or sixth aspect, further comprising a seeding means for preventing the combustion of the animal or vegetable oil in the combustion chamber from stopping. It is an animal and vegetable oil burning device.

According to a ninth aspect of the present invention, in the animal and vegetable oil combustion apparatus according to any one of the fifth to eighth aspects, oxidizing gas supply means for supplying an oxidizing gas into the combustion chamber is provided. It is an animal and vegetable oil burning device.

According to a tenth aspect of the present invention, in the animal and vegetable oil burning apparatus according to the ninth aspect, the oxidizing gas supply means is configured to swirl the oxidizing gas in the combustion chamber. It is a combustion device.

According to an eleventh aspect of the present invention, in the animal and vegetable oil burning device according to the ninth or tenth aspect, the animal and vegetable oil supply means includes an animal and vegetable oil supply source, and an animal and vegetable oil supply pipe connected to the animal and vegetable oil supply source. Wherein the oxidizing gas supply means is constituted by an oxidizing gas supply source, and an oxidizing gas supply pipe connected to the oxidizing gas supply source,
At least a tip portion of the animal and vegetable oil supply pipe is disposed inside the oxidizing gas supply pipe, and a supply port of the animal and vegetable oil supply pipe is provided at a position retreated from the supply port of the oxidant gas supply pipe. Further, the animal and vegetable oil supply pipe is provided with a hole for introducing an oxidizing gas flowing through the oxidizing gas supply pipe into the animal and vegetable oil supply pipe and acting in a direction in which the animal and vegetable oil is jetted. It is an animal and vegetable oil burning device.

According to a twelfth aspect of the present invention, in the animal and vegetable oil burning apparatus according to any one of the fifth to eleventh aspects, the combustion chamber has a furnace body having a concave portion opened at an upper part, and a furnace body having a concave portion formed inside the concave portion. An animal and vegetable oil burning device characterized by comprising a burning gama arranged.

According to a thirteenth aspect of the present invention, there is provided the animal and vegetable oil burning apparatus according to the twelfth aspect, wherein cooling means for cooling the furnace body is provided.

According to a fourteenth aspect of the present invention, in the animal and vegetable oil combustion apparatus according to any one of the fifth to thirteenth aspects, a catalyst for promoting the combustion of the animal or vegetable oil is provided in the combustion chamber. It is a combustion device.

According to a fifteenth aspect of the present invention, in the animal and vegetable oil burning apparatus according to any one of the fifth to fourteenth aspects, a secondary combustion chamber is provided for completely burning the residue discharged from the combustion chamber. It is an animal and vegetable oil burning device.

According to a sixteenth aspect of the present invention, in the animal and vegetable oil burning apparatus according to any one of the fifth to fifteenth aspects, there is provided a preliminary heating means for heating the animal and vegetable oil to make it liquid. Device.

[0023]

Embodiments of the present invention will be described below. As used herein, the term "animal / vegetable oil" refers to animal oil, vegetable oil, a mixture of animal oil and vegetable oil or waste oil thereof, and a mixture of animal oil, vegetable oil, a mixture of animal oil and vegetable oil, and these waste oils. "Animal and vegetable oils" also include animal and vegetable oils that are liquid when supplied to a preheated atmosphere. Therefore, even solids such as lard at room temperature are included in "animal and vegetable oils" if they are preliminarily heated to be liquid.

The atmosphere for supplying animal and vegetable oils, ie, the treatment atmosphere, may be an oxidizing gas atmosphere, ie, an air atmosphere, an oxygen-containing inert gas (eg, nitrogen or argon) atmosphere, a simple oxygen atmosphere, or a reducing atmosphere. Is also good. The treatment atmosphere is previously heated to a temperature equal to or higher than the thermal decomposition temperature of the animal and vegetable oil supplied thereto. Since the thermal decomposition temperature varies depending on the type of animal and vegetable oil, when a plurality of types of animal and vegetable oils are used, they are heated in advance to the thermal decomposition temperature of the animal and vegetable oil having the highest thermal decomposition temperature. In the case of waste oil, it may be altered by oxidation or polymerization. In such a case, the waste oil is preliminarily heated to the thermal decomposition temperature of the oxide or polymer as an alteration.

The processing atmosphere may be a natural convection atmosphere or a fluidized bed of an oxidizing gas, that is, an atmosphere in which the oxidizing gas is flowing. Such an atmosphere can be formed by blowing a pressurized oxidizing gas into the atmosphere. Preferably, the oxidizing gas atmosphere is used during the combustion process.
In order to prevent a misfire, the heating is performed at a temperature equal to or higher than an ignition source of the animal or vegetable oil to be treated. In the method of the present invention, by appropriately controlling the supply amount of animal and vegetable oils, it is possible to easily ignite even without providing a seed-fire means. The processing atmosphere includes not only a simple space but also a surface of a member that can be preheated.

FIG. 1 to FIG. 5 show an animal and vegetable oil burning apparatus according to a first embodiment of the present invention. Reference numeral 1 indicates a kitchen range as an animal and vegetable oil burning device. The kitchen range 1 includes a range main body 3, a tank 5, and an oil supply pipe 7.
, A torch burner 9, a control panel 11, and the like.

The range body 3 is made of a furnace 13
, A cylindrical preheating vessel 15 which is a burning slag, and a heating plate 1
7 The camad 13 has a concave shape having a circular horizontal cross section, and has an open upper surface. This kamado 1
3 is formed of a refractory brick such as alumina, magnesia and the like. The surface of the kamado 13 is made of stainless steel (for example, SU
It may be coated with a heat-resistant alloy such as S310). Kamado 13
A preheating container 15 is housed inside. The preheating container 15 is formed of a heat-resistant alloy such as stainless steel (for example, SUS310). Combustion chamber 1 is formed by a double structure of kamad 13 and preheating vessel 15 contained therein.
9 are configured.

The disk-shaped heating plate 17 is mainly for placing a cooking device such as a pot or a frying pan thereon,
It is detachably mounted so as to cover the opening surface of the combustion chamber 19. Reference numeral 21 denotes an auxiliary preheating container fixed to the lower surface of the heating plate 17, and this auxiliary preheating container has a short cylindrical shape in which a number of holes 23 are formed. Heating plate 17 is Kamado 13
When installed in the preheating container 1, a part of the auxiliary preheating container 21
5 is set in the upper end portion. This auxiliary preheating vessel 21
Is formed of a heat-resistant alloy such as stainless steel (for example, SUS310). Reference numeral 25 denotes a chimney.
Is opened at the inner peripheral surface of the combustion chamber 19. Chimney 25
The exhaust gas is discharged to the outside through

The tank 5 mainly stores animal and vegetable waste oil 27, and a filter 29 is disposed at the inner bottom thereof. Reference numeral 31 denotes an oil supply pipe.
Extends to the inside of the filter 29 through the outer wall of the tank 5, whereby the animal and vegetable waste oil 27 provided in the tank 5 is sent out to the oil supply pipe 31 while being filtered through the filter 29. It has become.

The blower 33 is arranged on the side of the range main body 3, and a gas-liquid mixer 35 is connected to a discharge port thereof.
The oil supply pipe 7 is connected to a gas-liquid mixer 35, and the tip of the oil supply pipe 7 penetrates through the kamad 13 of the range main body 3 and protrudes into the preheating vessel 15. And the gas-liquid mixer 35
Is connected to the tip of an oil supply pipe 31. The animal and plant waste oil 27 supplied from the tank 5 is mixed with the high-pressure air from the blower 33, and is mixed with the nozzle 7a of the oil supply pipe 7.
And is sprayed into the preheating container 15 in the form of a mist. 37
Indicates an electromagnetic valve, and the electromagnetic valve 37 is inserted into the oil supply pipe 31. The oil supply pipe 31, the oil supply pipe 7, the blower 33, and the gas-liquid mixer 35 constitute animal and vegetable oil supply means.

Reference numeral 39 denotes a gas supply pipe connected to a gas supply source such as a propane gas cylinder, and a burner controller 41 and a torch burner 9 are connected to the gas supply pipe.
The tip of the torch burner 9 is
And protrudes into the combustion chamber 19. An ignition device (not shown) is arranged near the nozzle 9a of the torch burner 9. The burner controller 41 includes the gas flow control valve 4
3, a transformer for the ignition device of the torch burner 9, and the like, and by controlling the gas flow control valve 43, the amount of gas ejected from the torch burner 9 is adjusted.

FIG. 3 shows a control system. Reference numeral 45 denotes a control circuit of the control panel 11, which is based on a microcomputer control system and performs a control operation in accordance with a procedure of a program stored in a storage unit thereof. Reference numeral 47 denotes a temperature sensor provided inside the preheating container 15, and the temperature sensor 47 is connected to the control circuit 45. The motor (not shown) of the blower 33, the electromagnetic valve 37, the burner controller 41, and the like are controlled by commands from the control circuit 45. The control means includes an electromagnetic valve 37 and a control circuit 45.

The kitchen range 1 is configured as described above, and the animal and vegetable waste oil 27 is stored in a predetermined temperature range, for example, 60 ° C.
It burns in an atmosphere heated to a temperature of 0 ° C or more and 800 ° C or less. That is, the thermal decomposition temperature of rapeseed oil, olive oil, and the like, which are frequently used in general fried food and stir-fry dishes, is 300 to
Although the temperature is about 500 ° C., the oil is heated to a temperature of 600 ° C. or higher, which is somewhat higher than the thermal decomposition temperature, in consideration of the fact that the oil is deteriorated or impurities are mixed therein to increase the thermal decomposition temperature.

Next, the combustion operation of the kitchen range 1 with such temperature management will be described with reference to the control program shown in FIG. When the start switch of the control panel 11 is turned on, the blower 33 is started, thereby sending high-pressure air into the combustion chamber 19. Next, the burner controller 41 starts at a predetermined timing, the gas flow control valve 43 is fully opened, and the torch burner 9 starts high combustion. Thereby, the preheating container 15 and the heating plate 17 are heated. The temperature in the preheating container 15 is detected by the temperature sensor 47 and is input to the control circuit 45.

When the temperature detected by the temperature sensor 47 exceeds 600.degree. C., the gas flow control valve 43 is throttled, the torch burner 9 is switched to low combustion, and the solenoid valve 37 is opened to release gas from the tank 5. The animal and vegetable waste oil 27 is sent to the liquid mixer 35. Thereby, the animal and vegetable waste oil 27 mixed with the high-pressure air is sprayed into the preheating container 15 in a mist state, and the animal and vegetable waste oil 27 injected into the preheating container 15 is sprayed.
Is completely burned by being instantaneously heated to a temperature exceeding 600 ° C. The flame and gas of this combustion are suppressed from diffusing by the auxiliary preheating vessel 21, thereby sufficiently heating the heating plate 17, going out through the holes 23, and escaping to the chimney 25.

After the burning of the animal and vegetable waste oil 27 is started in this way, the temperature in the preheating vessel 15 is controlled so as to be maintained at 600 to 800 ° C. in order to prevent overheating. That is, when the temperature in the preheating container 15 exceeds 800 ° C., the solenoid valve 37 is closed to stop the supply of the animal and vegetable waste oil 27, and it is waited that the temperature in the preheating container 15 becomes 800 ° C. or less. Then, the solenoid valve 37 is opened again to supply the animal and vegetable waste oil 27.

After the combustion operation is started, when the residual amount of animal and vegetable waste oil in the tank 5 falls below a certain level or when the start switch is turned off, the solenoid valve 37 is closed to stop the delivery of the animal and vegetable waste oil 27. Then, the combustion of the torch burner 9 is stopped at a predetermined timing, and the operation of the blower 33 is stopped. The operation of kitchen range 1 is performed as described above. If a stronger fire is required for cooking, a hot pot is attached instead of the heating plate 17.

FIGS. 5 to 8 show a second embodiment of the animal and vegetable oil burning apparatus according to the present invention. Reference numeral 51 denotes a large kitchen range. The kitchen range 51 has the same basic structure as the kitchen range 1, and includes a range main body 53, a tank 55, an oil supply pipe 57, a burner (not shown), a control panel (not shown), and the like.

The range main body 53 includes a furnace body 59, a combustion gamut 61, and a catalyst body 63. The furnace body 59 has a concave shape having a circular horizontal cross section, and has an open upper surface. The furnace body 59 includes a refractory brick 60 made of alumina, magnesia, or the like, and an outer wall 62 made of stainless steel. At the lower side inside the furnace body 59, a combustion gamut 61 is stored. The combustion games 61 are formed of a heat-resistant alloy such as stainless steel (for example, SUS310). A flange 61 a extends toward the inside of the open end of the upper surface of the combustion gusset 61.

As shown in FIG. 6, the catalyst body 63 includes a furnace body 59.
The catalyst body 63 is disposed above the combustion balls 61 in the inside.
Is exposed to the outside air. The catalyst body 63 burns,
That is, it is provided to promote oxidation. The main body 63a of the catalyst body 63 is made of a heat-resistant material such as a stainless alloy or cordierite, and is formed in a column shape having a large number of small holes 63b. A platinum group element or the like acting as an oxidation catalyst is attached to the inner peripheral surface of the small holes 63b. The upper end of the catalyst body 63 is adapted to allow a large pot 67 to be placed thereon.

A filter (not shown) is arranged at the inner bottom of the tank 55. The tank 55 is disposed on a base 56 in order to smoothly transfer animal and vegetable oils by utilizing the action of gravity. Reference numeral 57 denotes an oil supply pipe as an animal / vegetable oil supply pipe. The tip of the oil supply pipe 57 extends through the outer wall of the tank 55 to the inside of the filter, and the animal / vegetable oil provided in the tank 55 passes through the filter. The oil is sent to the oil supply pipe 57 in a filtered state. Tank 55
Is provided with a heater 58 as a preliminary heating means, and the heater 58 warms the animal and vegetable oil stored in the tank 55.

One end of an air supply pipe 71 as an oxidizing gas supply pipe is connected to the blower 69. Air supply pipe 7
The other end of 1 is connected to a hole 61b formed in the combustion gusset 61, and the supply port 71a of the air supply pipe 71 is at the same position as the inner peripheral surface of the combustion gusset 61, that is, at a position not protruding into the inside 7 of the combustion gusset 61. Provided. Further, the air supply pipe 71 is parallel to the tangential direction of the circular horizontal section of the furnace wall of the combustion gusset 61,
That is, it is arranged at a position deviated from the center of the combustion gusset 61.

The oil supply pipe 57 enters the air supply pipe 71, and the supply port 57 a of the oil supply pipe 57 is provided at a position retracted from the supply port 71 a of the air supply pipe 71. In addition, a hole 57b is provided on the peripheral surface of the distal end portion of the air supply pipe 71. The hole 57b is inclined toward the inside of the oil supply pipe 57 and extends in the direction of the supply port 57a. The tank 55 and the oil supply pipe 57 constitute animal and vegetable oil supply means.
The oxidizing gas supply means is constituted by 9 and the air supply pipe 71.

As shown in FIG. 9, switching valves 91 and 93 are connected to both ends of the bypass pipe 95, respectively. The switching valve 93 is connected to a compressor 99 via a connecting pipe 97.
Is connected. A switching valve 93 is connected to one end of the air pressure supply pipe 90, and the other end is inserted into the tank 55.
The air pressure supply pipe 90 has a pressure regulating valve 101 and a pressure gauge 1
03 is attached. Further, one end of the oil supply pipe 57 is inserted into the tank 55, and a switching valve 91 is attached to an intermediate portion of the oil supply pipe 57.

The outer wall of the furnace body 59 has a double wall structure, and a water passage space 59a is formed. This water space 5
A water supply pipe 77 and a water discharge pipe 79 connected to a water pipe are connected to 9a. Cooling means is constituted by the water passage space 59a, the water supply pipe 77, and the water discharge pipe 79. 8, reference numeral 75 denotes a gas burner, and the gas burner 75 is attached to the furnace body 59,
A flame is supplied inside.

Next, the combustion operation of the kitchen range 51 with such temperature control will be described. Kitchen range 51
Performs basically the same combustion operation as the kitchen range 1 according to the first embodiment.

When the start switch 81 is pressed, the blower 6
9 is operated, and air is sent from the air supply pipe 71 to the combustion gusset 61. The reason why the air is first sent to the combustion gusset 61 is to reliably expel the combustion residue of the animal and vegetable oil in the combustion gusset 61 and to prevent the explosion accident. Next, the gas burner 75 is ignited, and the flame is supplied to the inside of the furnace body 59 to heat the combustion flax 61.

On the other hand, the switching valves 91 and 93 are connected to the connecting pipe 97-.
The bypass pipe 95 and the tip 57c of the oil supply pipe are in communication. When the temperature in the combustion gusset 61 reaches 800 ° C., this is detected by a temperature sensor, and the air pressure supplied from the compressor 99 is supplied from the connecting pipe 97 to the bypass pipe 95 and further to the tip 57c of the oil supply pipe. The animal and vegetable oil stored in the section 57c is discharged from the supply port 57a. The operation of discharging the animal and vegetable oils is performed for three minutes.
Next, the switching valves 91 and 93 are switched, and the connecting pipe 97-
A state is established in which the air pressure supply pipe 90, the tank 55, the oil supply pipe 57, and the tip 57c of the oil supply pipe communicate with each other. Therefore, by the air pressure supplied from the compressor 99 to the tank 55 via the connection pipe 97 and the air pressure supply pipe 90, the animal and vegetable oil in the tank 55 passes through the oil supply pipe 57 and is supplied to the supply port 57a.
, And is supplied to the combustion gusset 61. The animal and vegetable oil in the tank 55 is heated to about 80 ° by the heater 58. Therefore, even if it is immobilized at room temperature such as lard, it can be supplied in a liquid state and supplied smoothly.

As described in FIG. 7, the oil supply pipe 5
Since a hole 57b is formed in the tip portion 57c of No. 7,
Air passing through the air supply pipe 71 is supplied from the hole 57b to the oil supply pipe 57.
To the oil supply pipe 5
The animal and vegetable oil passing through 7 is accelerated and injected from the supply port 57a. Therefore, even if the supply port 57a of the oil supply pipe 57 is located at a position retracted from the supply port 71a of the air supply pipe 71, the animal and vegetable oil can be reliably supplied to the combustion turtle 61. In addition, the animal and vegetable oil is extruded (pulled) by the flow of the air that has entered the oil supply pipe 57, so that the animal and vegetable oil is discharged from the oil supply pipe 57 to the combustion gag 61 in the form of elongated oil droplets. Therefore, the surface area of the animal and vegetable oils is increased, and thermal decomposition and combustion are promoted. Further, it is possible to prevent the animal and vegetable oil flowing through the oil supply pipe 57 from flowing backward.

Since the burning sesame 61 is heated to 800 ° C., the animal and vegetable oils released into the burning stuff 61 ignite, and the combustion is started. Since the air supply pipe 71 is arranged at a position deviated from the center of the combustion gusset 61, a flow of air that rises while turning along the combustion gusset 61 is generated. The animal and vegetable oil also rises while turning, riding on this air flow.
Further, the air flow collides with the flange 61a, the flow is disturbed, and the animal and vegetable oils are stirred together with the air. Accordingly, the time during which the animal and vegetable oil stays in the burning turtle 61 is prolonged, and the animal and vegetable oil and air are sufficiently stirred and mixed. For this reason, the thermal decomposition and combustion of the animal and vegetable oils are reliably performed.

The animal and vegetable oils are almost completely burned in the burning sesame 61, but the slightly remaining animal and vegetable oils are completely burned when passing through the small holes 63 b of the catalyst 63. That is, the residue of the animal or vegetable oil that has left the burning turtle 61
Is completely combusted by the action of a catalyst that promotes oxidation when passing through to generate thermal energy. When the animal or vegetable oil burns, the temperature in the burning turtle 61 rises. Burning cat 6
A temperature sensor (not shown) detects the temperature in 1 and the supply of animal and vegetable oil is stopped when the temperature in combustion gamut 61 reaches 1000 ° C., and the supply of animal and vegetable oil is restarted when it reaches 800 ° C. Therefore, the temperature in the combustion gamut 61 is 80
It will be kept in the range of 0 to 1000 ° C. Therefore, generation of dioxin is prevented in a preventive manner. Water supply pipe 77
The water is supplied from the water supply space 59a to the water supply space 59a, whereby hot water is discharged from the water supply space 59a via the water discharge pipe 79, and the outer wall of the furnace body 59 is cooled to prevent overheating.

When the kitchen range 51 is stopped, the switching valves 91 and 93 are switched to a state in which the connecting pipe 97, the bypass pipe 95, and the tip 57c of the oil supply pipe are communicated with each other, so that the flue gas 61 for animal and vegetable oils is burned. Stop supplying. Then, a discharging operation for surely discharging the animal and vegetable oil which may have accumulated at the tip portion 57a of the oil supply pipe is performed for 3 minutes, and in parallel with this, the gas burner 75 is burned for about 3 minutes. This is to completely burn the animal and vegetable oil and the animal and vegetable oil in the combustion chamber 19 that accumulate at the tip 57a of the oil supply pipe. Further, after stopping the combustion of the gas burner 75, the air supply from the air supply pipe 71 is continued for about 4 minutes,
After the animal and vegetable oils are completely discharged from the combustion chamber 19, the kitchen range 51 is completely stopped. This is to prevent the explosion when the combustion residue of the animal and vegetable oil remains in the combustion chamber 19 when the kitchen range 51 is operated and the gas burner 75 is ignited next time.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and there are changes in the design without departing from the gist of the present invention. Are also included in the present invention. For example, in any of the embodiments, the combustion chamber is formed of a double structure composed of a furnace body and a combustion slag, but the combustion slag may be omitted and the pyrolysis and combustion may be performed in the furnace body. Depending on the type of animal or vegetable oil used, the pyrolysis temperature is relatively low, so that burning sesame can be omitted.

In each of the embodiments, the complete combustion of animal and plant waste oil is achieved in a single combustion chamber.
A plurality of combustion chambers (for example, secondary combustion chambers) may be provided to completely burn when exiting the last combustion chamber. In this case, providing the secondary combustion chamber does not necessarily mean providing another single auxiliary combustion chamber, but also includes providing a plurality of auxiliary combustion chambers.

Even if the oil in the tank becomes empty, the combustion can proceed with only the heat of the gas burner. First
In the above-described embodiment, the present invention is applied to a kitchen range used when cooking and boiling water is placed on a heating plate, but the invention is not limited to this, and a wire mesh or the like may be placed. In the first embodiment, a torch burner is used. However, the present invention is not limited to this, and various burners can be used. The animal and vegetable oils and the oxidizing gas may be supplied separately.

In order to prevent unintentional stopping of the combustion of animal and vegetable oils, a pilot flame burner may be provided as a pilot flame means in the combustion chamber to prevent the supply of animal and vegetable oils in a fire-extinguishing state. Instead of providing a blower or the like, air may be sent into the combustion chamber using natural convection of air. The invention is not limited to cooking utensils, and may be applied to water heaters, boilers, heating appliances, and the like. In the second embodiment, the temperature of the combustion flax 61 is maintained in the range of 800 to 1000 ° C., but the present invention is not limited to this, and the temperature of the combustion flax 61 is maintained at 370 ° C. to 150 ° C.
Any lower limit temperature and upper limit temperature may be set and controlled within the range of 0 ° C. 370 ° C. is a temperature (ignition point) that serves as an ignition source of the tempura oil. When processing the tempura oil, by setting the lower limit to this temperature, the tempura oil can be burned without providing a pilot flame. . Also 1500
C is the upper limit of the temperature that the stainless steel used for kitchen ranges 1 and 51 can withstand.

In the above embodiment, the treatment is carried out with animal and vegetable oils alone, but the present invention is not limited to this, and mineral oils such as kerosene may be mixed with animal and vegetable oils. Mixing mineral oil has the effect of improving viscosity and lowering the ignition point.

[0058]

EXAMPLE The apparatus according to the second embodiment was actually operated.
The used oil was used edible waste oil of a commercially available edible oil, and the supply flow rate was 4 liters / hour. And
The furnace wall temperature was 910 ° C. at the maximum. The residence time of the oil was set to 2 seconds or more. Power consumption is 0.5kW / h to 1k
W / h. The smoke emitted from the device was measured and compared with the emission standards of the incinerator. Table 1 shows the results.

[0059]

[Table 1] For hydrogen chloride, which is closely related to dioxin,
The concentration measured in this example is very low and is within the range of measurement error. Although it depends on conditions such as the output power of air, the above measurement results show that the combustion is completely satisfactory from an environmental point of view.

[0060]

As described above, in the animal and vegetable oil burning method and the animal and vegetable oil burning apparatus of the present invention, the animal and vegetable oil supplied in the oxidizing gas atmosphere instantaneously evaporates and ignites, so that it is completely burned. There is no fear of generating black smoke, soot and odor. In addition, in the animal and vegetable oil combustion device provided with the oxidizing gas supply means, the combustion of the animal and vegetable oil itself is sufficiently heated, so that the fuel for heating the combustion chamber uses the heat of the animal and vegetable oil supplied by this atmosphere. It is only necessary to keep it below the decomposition temperature, so that the fuel supply is very low.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a kitchen range according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of a range main body of the kitchen range shown in FIG. It is.

FIG. 3 is a diagram showing a control system of the kitchen range shown in FIG. 1;

FIG. 4 is a diagram showing a control program of the kitchen range shown in FIG. 1;

FIG. 5 is an overall perspective view of a kitchen range according to a second embodiment of the present invention.

6 is an enlarged perspective view of a catalyst body and an inner furnace body of the kitchen range shown in FIG.

7 is an enlarged vertical sectional view of an oil supply pipe and a gas supply pipe of the kitchen range shown in FIG. 5;

8 is a horizontal sectional view when the kitchen range shown in FIG. 5 is cut along the AA section.

9 is a schematic diagram of an animal and vegetable oil supply system of the kitchen range shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Kitchen range 5 Tank 7 Oil supply pipe 9 Torch burner 13 Kamado 15 Preheating container 17 Heating plate 19 Combustion chamber 27 Animal and vegetable waste oil 45 Control means 47 Temperature sensor 51 Kitchen range 53 Range body 55 Tank 57 Oil supply pipe 57a Oil supply pipe supply Mouth 57b Hole 57c Tip of oil supply pipe 59 Furnace body 61 Combustion plaster 63 Catalyst 65 Combustion chamber 67 Large pot 69 Blower 71 Air supply pipe 71a Supply port of air supply pipe 73 Hole 75 Gas burner 77 Water supply pipe 79 Water discharge pipe

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F23G 5/44 ZAB F23G 5/44 ZABD ZABF ZABB 5/50 ZAB 5/50 ZABG ZABM

Claims (16)

[Claims] 1. A method for burning animal and vegetable oils, comprising supplying an animal and vegetable oil to an atmosphere preheated to a temperature higher than its thermal decomposition temperature, pyrolyzing the oil, and then burning it. 2. The animal and vegetable oil burning method according to claim 1, wherein an atmosphere for supplying the animal and vegetable oil is heated to a temperature equal to or higher than a temperature serving as an ignition source of the animal and vegetable oil. 3. The method for burning animal and vegetable oils according to claim 1, wherein the temperature of the atmosphere for supplying animal and vegetable oils is 37.
A method for burning animal and vegetable oils, which is carried out at 0 to 1500 ° C. 4. The method for burning animal and vegetable oils according to claim 1, further comprising mixing mineral oil with the animal and vegetable oils. 5. A combustion chamber, heating means for heating the combustion chamber so that the atmosphere in the combustion chamber is equal to or higher than the thermal decomposition temperature of the animal and vegetable oil, and means for supplying the animal and vegetable oil into the combustion chamber. An animal and vegetable oil burning device comprising: animal and vegetable oil supply means. 6. The animal and vegetable oil burning apparatus according to claim 5, wherein a temperature sensor for detecting a temperature of an atmosphere in the combustion chamber, and the animal and vegetable oil supply means in response to the temperature detected by the temperature sensor. An animal and vegetable oil combustion device, comprising: control means for controlling oil supply. 7. The animal and vegetable oil combustion apparatus according to claim 6, wherein the control means controls the supply of the animal and vegetable oil so that the atmosphere in the combustion chamber is equal to or higher than the temperature at which the animal and vegetable oil is ignited. An animal and vegetable oil burning device characterized by the following. 8. The animal / vegetable oil combustion apparatus according to claim 5, further comprising a seed-fire means for preventing combustion of the animal / vegetable oil in the combustion chamber from stopping. 9. The animal and vegetable oil burning apparatus according to claim 5, further comprising an oxidizing gas supply means for supplying an oxidizing gas into said combustion chamber. 10. The animal / vegetable oil combustion apparatus according to claim 9, wherein said oxidizing gas supply means swirls the oxidizing gas in said combustion chamber. 11. The animal and vegetable oil burning device according to claim 9, wherein said animal and vegetable oil supply means is constituted by an animal and vegetable oil supply source and an animal and vegetable oil supply pipe connected to said animal and vegetable oil supply source. The oxidizing gas supply means is constituted by an oxidizing gas supply source and an oxidizing gas supply pipe connected to the oxidizing gas supply source, and at least a tip end of the animal and vegetable oil supply pipe is connected to the oxidizing gas supply pipe. The supply port of the animal and vegetable oil supply pipe is provided at a position retreated from the supply port of the oxidizing gas supply pipe, and the animal and vegetable oil supply pipe flows through the oxidant gas supply pipe. An animal / vegetable oil burning device, comprising a hole for introducing an oxidizing gas into the animal / vegetable oil supply pipe and acting in a direction in which the animal / vegetable oil is injected. 12. The animal and vegetable oil burning device according to claim 5, wherein said combustion chamber has a furnace body having a concave portion opened at an upper portion, and a combustion gama disposed inside said concave portion. An animal and vegetable oil burning device characterized by comprising: 13. The animal and vegetable oil burning device according to claim 12, further comprising cooling means for cooling said furnace body. 14. The animal and vegetable oil combustion apparatus according to claim 5, wherein a catalyst for promoting the combustion of the animal or vegetable oil is provided in the combustion chamber. 15. The animal / vegetable oil combustion device according to claim 5, further comprising a secondary combustion chamber for completely burning the residue discharged from said combustion chamber. 16. The animal / vegetable oil combustion apparatus according to claim 5, further comprising a preliminary heating means for heating the animal / vegetable oil to be in a liquid state.