JPH08200619A - Pot type petroleum combustion apparatus - Google Patents

Abstract

PURPOSE: To obtain a burner which does not generate odor at the time of extinguishing a pot type petroleum combustion apparatus. CONSTITUTION: This pot type petroleum combustion apparatus comprises a fuel pump 2 for pumping fuel of an oil tank 1, an oil supply tube 4 for dropping to supply the fuel to a burner 3 by the pump 2, and an ignition heater 6 for igniting the fuel dropped to the burner 3, wherein the ignition and the partial combustion are conducted in the burner 3. the end of a nozzle 5 for supplying the fuel is placed at the lower part of the heater 6, the upper part of the heater 6 is covered with a catalyst 7 to expedite the oxidation reaction by the catalyst placed above the nozzle 5 even if the fuel remaining in the nozzle 5 is evaporated after the apparatus is extinguished, thereby eliminating the diffusion of incompletely burnt gas out of the apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner section of a pot type oil combustor.

[0002]

2. Description of the Related Art A pot type oil combustor includes a fuel pump for pumping fuel from an oil tank, an oil supply pipe for supplying fuel to a burner by the fuel pump, and an ignition heater for igniting the fuel dropped on the burner. It is equipped with it, and it ignites and burns part of it in the burner.

Since such a pot type oil combustor has a structure in which fuel is dripped and supplied, the oil supply pipe has a nozzle shape and extends into the burner, and the fuel pump is stopped to extinguish the oil combustor. When I did, there was still fuel in the fuel line. Therefore, when the fuel remaining in the nozzle expands due to the combustion heat, the fuel gradually drops into the burner.If there is still flame, the extinguishing time will be longer, and if the flame is still extinguished, the dropped fuel Was decomposed by heat and released as an incomplete combustion gas, generating a strong malodor.

Therefore, conventionally, by interlocking with the fire extinguishing operation, the fuel in the oil supply pipe is returned to the oil tank, or the fuel suction mechanism for accumulating the fuel in the oil storage chamber is operated, so that the nozzle of the oil supply pipe extending into the burner is inserted. A structure that does not leave fuel is implemented.

For example, in a fuel suction mechanism utilizing blown air pressure, a middle of an oil supply pipe connecting a fuel pump and a burner is piped in a U shape, and a U-shaped lower portion and a discharge side of a blower are connected by an air pipe. However, the air pipe near the connection with the oil supply pipe constitutes the oil storage chamber, and while the blower is operating, it pushes back the fuel entering the air pipe by the blower air pressure, and when the blower stops, the fuel enters the air pipe. The burner prevents the fuel from remaining in the burner side nozzle. Therefore, even if the nozzle is heated by the heat of the burner after the fire extinguishing operation, the fuel is not sent to the burner, the fire extinguishing time is shortened, and the strong odor generated immediately after the fire extinguishing can be prevented.

[0006]

The above structure is intended to prevent the fuel from dripping into the burner immediately after the fire is extinguished, thereby shortening the fire extinguishing time and preventing the generation of a strong odor immediately after the fire is extinguished. Even if it is done, the fuel adheres to the inner wall of the nozzle and the oil supply pipe, and the fuel is gradually vaporized by the heat of the burner until the burner is completely cooled.

After the extinguishing of the fire, the vaporized gas is thermally decomposed by a still high-temperature burner and leaks out of the equipment as an incomplete combustion gas. Therefore, an odor is generated even after a while after extinguishing the fire. Therefore, the user may feel uncomfortable.

[0008]

In order to solve the above problems, the present invention provides a fuel pump 2 for pumping fuel from an oil tank 1, and an oil supply pipe 4 for supplying fuel to a burner 3 by the fuel pump 2. Nozzle 5 formed of a part of oil supply pipe 4 for dropping fuel toward the bottom of burner 3, and burner 3
In a pot type petroleum combustor equipped with an ignition heater 6 for igniting the fuel dropped to the burner 3, the pot type petroleum combustor for igniting and burning in the burner 3 is located in the lower portion of the burner 3 with a gap above the tip of the nozzle 5. The catalyst 7 is positioned by the catalyst 7, and the incomplete combustion gas is reburned by the catalyst 7 to suppress the generation of a bad odor.

The ignition heater 6 is also used for preheating, the tip of the nozzle 5 which is a part of the oil supply pipe 4 is located below the ignition heater 6, and the gap between the tip of the nozzle 5 and the catalyst 7 is also used for preheating. The ignition heater 6 is provided to heat and clean the catalyst each time the ignition operation is performed.

When the oil combustor is extinguished, the ignition heater 6 mounted at the above position is energized to heat the nozzle 5 which is a part of the oil supply pipe 4 to quickly remove the fuel remaining in the nozzle 5. It vaporizes.

[0011]

The inside of the burner 3 is at a high temperature during combustion in the oil combustor, and the catalyst 7 located above the tip of the nozzle 5 for supplying fuel is also heated to a high temperature during the combustion of the burner 3. ing. For this reason, when the fuel pump 2 is stopped by the fire extinguishing operation, the burner 3 is extinguished soon, but since the catalyst 7 immediately after the extinction keeps a high temperature, fuel drips from the tip of the fuel supply pipe 4 after extinguishing and the burner 3 is extinguished. Even if vaporized, the catalyst 7 provided above promotes the oxidation reaction and complete combustion, and the catalyst 7 maintains a high temperature by this reaction.

Therefore, even if the fuel is dropped into the burner 3 after extinguishing the oil combustor, the odorous reaction of the catalyst 7 does not cause a bad odor.

Further, even if there is no fuel in the fuel supply pipe 4 due to the fuel in the fuel supply pipe 4 dripping on the burner 3 or the fuel suction mechanism operating for a short time to extinguish the fire, the fuel is still refueled. Even if this fuel adheres to the inner wall of the pipe 4 and is vaporized and discharged from the tip of the refueling pipe 4, an oxidation reaction is performed by the upper catalyst 7 and complete combustion occurs. Could be prevented.

Since the ignition heater 6 also serving as preheat is located between the tip of the nozzle 5 and the catalyst 7, the ignition heater 6 energized each time the petroleum combustor is used heats the burner 3 and supplies oil. The pipe 4 and the catalyst 7 are heated, and carbonaceous deposits adhering to the tip of the oil supply pipe 4 are burned off and cleaned.

Further, the catalyst 7 becomes dark due to the vapor of the fuel and its effect is deteriorated quickly. However, if the preheating / ignition heater 6 becomes red heat during the ignition operation, it is always cleaned and the catalyst effect can be obtained for a long time.

Further, the ignition heater 6 is used when the oil combustor is extinguished.
Energizes to heat the ignition heater 6 red, thereby heating the tip portion of the oil supply pipe 4, the fuel remaining in the oil supply pipe 4 expands and a part of the fuel drops into the burner 3, and Since the fuel adhering to the wall surface is forcibly vaporized, the tip portion of the oil supply pipe 4 dries shortly after the fire extinguishing operation, and the fuel gas does not blow out.

Further, even if the concentration of the combustible gas dropped by the fuel dropped after the extinguishing operation is low, the ignition heater is burnt red and almost burns out, and after the extinguishing operation, the catalyst 7 is heated to a high temperature by the heat of the ignition heater 6. From maintaining
Even a small amount of fuel gas surely causes an oxidation reaction to completely burn.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings shown in the embodiments. 1 is an oil tank for storing fuel, 2 is a fuel pump for pumping fuel attached to the upper part of the oil tank, and 3 is fuel sent from the fuel pump 2. An incoming burner, 4 is an oil supply pipe connecting the fuel pump 2 and the burner 3, and 5 is a burner 4 of the oil supply pipe 4.
In the nozzle 5 of the embodiment, a portion inside the burner 3 is constituted by an oil supply pipe 4 having a small diameter, and the fuel is dropped toward the bottom of the burner 3. As another embodiment, the oil supply pipe 4 having a substantially same diameter may be formed from the tip of dropping the fuel to the fuel pump 2.

6 is an ignition heater provided in the burner 3 for preheating, 8 is a blower provided in the vicinity of the burner 3, and 9 is a blower passage for sending combustion air to the burner 3, which also serves as preheat when an ignition operation is performed. The ignition heater 6 is energized to raise the burner 3 to the vaporization temperature, and then the fuel pump 2 and the blower 8 are operated to supply the fuel dropwise into the burner 3 from the nozzle 5 at the tip of the oil supply pipe 4, while The combustion air is supplied to the burner 3 through the air passage 9.

For this reason, the fuel is ignited by the ignition heater 6 which glows red, and the combustion is started in the burner 3 and the combustion chamber 10 following the burner 3. When the combustion becomes stable, the energization to the ignition heater 6 is stopped and the normal operation is performed. Do.

Next, when the fire extinguishing operation is performed, the operation of the fuel pump 2 is stopped, so that the burner 3 is extinguished because there is no fuel,
After a short delay, the operation of the blower 8 is stopped and the fire is extinguished completely. By the way, if fuel remains in the fuel supply pipe 4 after extinguishing the fire, the fuel heated by the heat of the burner 3 expands and drip into the burner 3 after extinguishing the fire, and this fuel thermally decomposes and has a strong odor. And spread.

Reference numeral 11 is a fuel suction mechanism for sucking the fuel in the fuel supply pipe 4 after the fire is extinguished to prevent the generation of a strong odor and at the same time to prevent the fuel from dripping into the burner 3 to shorten the extinguishing time. The structure is such that the fuel in the oil supply pipe 4 including the nozzle 5 is forcibly returned to the oil tank 1 by the suction pump.

The fuel suction mechanism 11 shown in the embodiment is a blower 8
4a is a U-shaped pipe formed so that the middle of an oil supply pipe 4 connecting the fuel pump 2 and the burner 3 is lowered, and 12 is a lower portion of the U-shaped pipe 4a and a blower 8
Is an air pipe that communicates with the discharge side of the fuel pump. When the fuel pump 2 is operated, the fuel is sent to the burner 3 through the U-shaped pipe 4a, and the fuel also tries to flow into the air pipe 12.
The blower 8 is operated against this fuel to apply wind pressure to the air tube 12 so that the fuel does not flow into the air tube 12 during combustion.

On the other hand, when the operation of both the fuel pump 2 and the blower 8 is stopped by the fire extinguishing operation, the fuel flows into the air pipe 12 connected to the U-shaped pipe 4a by a head pressure drop, and the inside of the nozzle 5 at the tip of the oil supply pipe 4 is closed. The fuel is sucked in.

Reference numeral 7 denotes an oxidation catalyst which is positioned above the nozzle 5 at the tip of the oil supply pipe 4 extended in the burner 3 with a gap, and the catalyst 7 is formed on the surface of a wire mesh having a U-shaped cross section. It is attached, and the end of the wire mesh is attached to the bottom of the burner 3.

The U-shaped catalyst 7 of the embodiment is mounted so as to cover a horizontally arranged rod-shaped preheating and ignition heater 6, and the tip of the nozzle 5 of the oil supply pipe 4 is located below the ignition heater 6. It's stretched to do. A gap is formed between the tip of the nozzle 5 and the upper catalyst 7, and the fuel drops after the fire is extinguished, and the vaporized fuel gas diffuses and mixes with the combustion air before passing through the catalyst 7. Catalyst 7
The oxidative effect of the above works effectively, and since it oxidizes completely, the incomplete combustion gas is not discharged, and the strong odor immediately after the extinguishing of fire is not generated.

Further, since the catalyst maintains a high temperature when the oxidation reaction is carried out, even if the fuel adhering to the inner wall of the nozzle 5 is gradually vaporized and leaks, it is surely converted into a complete combustion gas, so that it continues after extinguishing the fire. It is also possible to prevent the generation of offensive odor. Further, since the tip of the nozzle 5 is located below the ignition heater 6 and the ignition heater 6 is located between the tip of the nozzle 5 and the catalyst 7, the ignition heater 6 causes the nozzle 5 and the catalyst 7 to be ignited each time. It is red-hot, and carbon, tar, etc. attached to the tip of the nozzle 5 can be burned off in a short time,
The catalyst 7, which becomes dark due to use and has a reduced oxidation effect, can also be cleaned by the preheating / ignition heater 6 heating red, and the catalytic effect can be obtained for a long time.

The ignition heater 6 is used when the oil combustor is extinguished.
The fuel inside the fuel supply pipe 4 and the oil droplets adhering to the inner wall are evaporated in a short time by heating the fuel supply pipe 4 by heating the fuel supply pipe 4, and the inside of the nozzle 5 becomes dry, so that the vaporized gas of the fuel Outbreak stops. At this time, since the catalyst 7 is maintained at a high temperature by the ignition heater 6 which glows red, the oxidation is surely promoted and the incomplete combustion gas is not generated.

When a pot type oil combustor is used as the burner 3, a disc-shaped, ring-shaped or cylindrical auxiliary combustion member 13 is mounted in the burner 3, and the catalyst 7 has a ring-shaped auxiliary combustion member 13. The catalyst 7 may also be used to promote the oxidation reaction of the fuel gas generated from the tip of the nozzle 5 at this time, and diffuse the incomplete combustion gas that causes the malodor to the outside of the device. Can be prevented.

[0030]

Since the present invention has the above-mentioned structure and action, the catalyst 7 is used to generate an incomplete combustion gas generated by the evaporation of oil droplets remaining in the nozzle 5 when the oil combustor is extinguished. Is completely burned by the oxidation promotion reaction of
It prevents the incomplete combustion gas, which is the cause of the bad smell, from diffusing out of the equipment. Therefore, the user does not feel uncomfortable due to an unpleasant odor when extinguishing the oil combustor.

Since the ignition heater 6 also serving as preheat is located in the gap between the tip of the nozzle 5 and the catalyst 7, the preheat / ignition heater 6 is always energized to generate red heat during the ignition operation. Is always cleaned every ignition operation, so that the oxidation promoting reaction of the catalyst 7 continues for a long time.

Further, during the ignition operation, the catalyst 7 is heated to a high temperature by the ignition heater 6 which also serves as preheating, so that a part of the incomplete combustion gas generated at the time of ignition is promoted to be oxidized by the catalyst 7 to become a complete combustion gas. It has changed, and the bad smell at the time of ignition can be reduced.

Further, by energizing the ignition heater 6 to heat the nozzle 5 even when the oil combustor is extinguished, the fuel gas vaporized from the tip of the nozzle 5 can be discharged quickly and reliably. As a result, the carbonaceous deposits were not deposited on the tip of the nozzle 5, and the fuel gas did not leak from the nozzle 5 for a long period of time and continued to generate a bad odor in the surroundings.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing another embodiment of the pot type oil combustor of the present invention.

[Explanation of symbols]

 1 Oil Tank 2 Fuel Pump 3 Burner 4 Oil Supply Pipe 5 Nozzle 6 Ignition Heater 7 Catalyst

Claims (3)

[Claims] 1. A fuel pump 2 for pumping fuel from an oil tank 1, an oil supply pipe 4 for supplying fuel to a burner 3 by the fuel pump 2, and an oil supply pipe 4 for dripping fuel toward the bottom of the burner 3. Nozzle 5 which is partially configured, and the burner 3
In a pot type petroleum combustor equipped with an ignition heater 6 for igniting the fuel dropped to the burner 3, the pot type petroleum combustor for igniting and burning in the burner 3 is located in the lower portion of the burner 3 with a gap above the tip of the nozzle 5. A petroleum combustor in which the catalyst 7 is located. 2. The ignition heater 6 is also used for preheating, and the oil supply pipe 4 is used.
2. The pot type petroleum combustion according to claim 1, wherein the tip of the nozzle 5 which is part of the above is located below the ignition heater 6, and the ignition heater 6 which also serves as preheating is provided in the gap between the tip of the nozzle 5 and the catalyst 7. vessel. 3. The pot type petroleum combustor according to claim 2, wherein the ignition heater 6 is energized to heat the nozzle 5 which is a part of the oil supply pipe 4 even when the oil combustor is extinguished.