JPS61223417A - Burning device for heating - Google Patents

Abstract

PURPOSE:To enable to vaporize surely fuel such as kerosene, etc. and burn completely with no clogging by installing such a device that is installed at the front of a primary burning chamber and injects secondary air to a front end opening of a cylinder and reduces pressure at a back part. CONSTITUTION:In the inside of a cylinder 1 a primary burning chamber 11, which injects fuel from a fuel injection nozzle 6 and is equipped with a flow resistance generating part to disturb air flow, is installed and before it, a secondary air supply part 17 is also installed. Secondary air is supplied into the inner of a cylinder 3 in a main body is injected to a front end opening at a front part of the cylinder 3 and the back part of the cylinder 3 is reduced in pressure. Thus, mixing of unburnt fuel, primary burning flame, and primary air is promoted and unburnt fuel is surely vaporized and burnt completely. By heating in the state of soaking fuel in oil containing body, fuel is surely vaporized and clogging up is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a heating combustion device for burning fuels that are difficult to vaporize, such as heavy oil and kerosene.

(Prior art) There are various types of conventional combustion devices, such as a pressure spray type, a spray set, a rotary set, and a vaporization combustor type, but all of these have complex structures and are expensive, or they use kerosene. The disadvantage was that it was not possible to use fuels that were difficult to vaporize. In addition, a combustion device has been proposed in which a fuel that is difficult to vaporize, such as kerosene, is sprayed onto an oil-impregnated body to impregnate it, and then heated and vaporized to achieve complete combustion. It is equipped with a small-diameter ventilation hole, and is configured so that fuel seeps into the ventilation hole, so that soot and the like easily adhere to the ventilation hole. For this reason, when the above-mentioned combustion device is used for a long time, soot etc. tend to adhere and accumulate in the air holes of the oil-impregnated body, resulting in clogging, which impairs the impregnation of the fuel and prevents the fuel from promoting vaporization. was there.

(Purpose of Application) The present invention has been made to solve the above problems, and it is possible to operate continuously for a long time without causing clogging, etc., and to use a simple and compact device to remove kerosene The purpose of the present invention is to provide a heating combustion device that can reliably vaporize and completely burn fuels that are difficult to vaporize, such as fuels that are difficult to vaporize.

(Structure of the Invention) The heating combustion device of the present invention includes an n-body whose front end is open and whose rear end communicates with a source of primary air, and a fuel injection nozzle disposed at the rear end of this cylindrical body. A primary combustion chamber equipped with a flow resistance imparting member that obstructs the flow of the fuel injected from the fuel injection nozzle and the primary air is provided inside the cylindrical body; A secondary air supply section is provided that injects air toward the front end opening of the cylinder body to reduce the pressure in the area in contact with the cylinder body.

(Example) FIG. 1 shows an example in which a heating combustion device according to the present invention is used as a hot air heater. This hot air heater includes a cylindrical body 1 and mantle tubes 2 disposed at predetermined intervals so as to surround the outer circumference M of the cylindrical body 1.

The cylindrical body 1 is comprised of a front cylindrical body 3 whose front end is spaced within the mantle tube 2, and a rear cylindrical body 5 whose rear end is connected to the blower pipe 4 via a communication pipe 5a.

A fuel injection nozzle 6 and a spark plug 7 are attached to the rear end of the rear cylinder 5 through a partition plate 8, and a large number of through holes 9 are formed in the peripheral wall in front of the rear cylinder 5. At the same time, a shielding plate 10 to which fuel injected from the fuel injection nozzle 6 is sprayed is disposed at its front end, thereby forming a -fire explosion chamber 11.

A partition 12 is disposed at the rear end N of the front cylinder 3, and the front cylinder 3 and rear cylinder 5 are connected via the partition 12. A baffle plate 13 is installed on the front cylinder 3 to narrow its diameter, and in front of the baffle plate 13 is introduced the tip of the air pipe 4 that communicates with an air source such as a blower (not shown). By doing so, a secondary air supply section 17 is formed in front of the fire explosion chamber 11, and this secondary air supply section 17 injects secondary air toward the front end opening of the front cylinder body 3. It has become. Further, as shown in FIG. 2, a large number of heat radiation fins 18 are attached to the outer peripheral surface of the front cylinder 3. As shown in FIG. The mantle tube 2 has a rear end connected to a tertiary air chamber R (source) consisting of a blower (not shown), and a front end connected to an object to be heated such as a plastic greenhouse via a communication pipe etc. -[2 partition plate 8
As shown in Fig. 3, a large number of single-shaped notches 8o are formed on the outer periphery, and these notches 8o are erected to form air ventilation holes and inclined at a predetermined angle. forming a primary air guiding plate, rotating the above-mentioned primary air, and -
It is designed to be supplied into the fire, smoke and roasting chamber 11. Incidentally, in order to prevent the oxygen in the heated room such as a plastic greenhouse from decreasing, it is necessary to lead the rear end of the air pipe 4 to the outside of the heated room.

In the above configuration, an air blowing source (not shown) disposed at the rear end of the air pipe 4 is operated while supplying primary air to the rear end of the cylinder 1 through the communication pipe 5a, and from the fuel injection nozzle 6. If you inject fuel such as kerosene and ignite it with spark plug 7, the fuel v1
A part of the fuel explodes in one ignition, and the remaining fuel explodes onto the shielding plate 1.
It is sprayed on the air and becomes uradome in the fire-smoke-burning chamber 11.

Further, the secondary air supplied into the front solid body 3 from the distribution wind pipe 4 via the secondary air supply section 17 is injected toward the front end opening of the front cylinder body 3, thereby causing the cylinder body to The rear of the is depressurized. Therefore, the unburned fuel remaining in the fire and smoke combustion chamber 11 is mixed with the primary combustion flame and the primary air, and is led out through the through hole 9 and into the front cylinder body 3 while undergoing secondary combustion. It will be supplied. That is, the front end of the rear cylinder body 5 is closed by the shielding plate 10, and this shielding plate 10 acts as a flow resistance imparting member that obstructs the flow of the fuel J5 and primary air injected from the fuel injection nozzle 6. All combustion fuel and the like are led out radially from the through holes 9. Therefore, in the process, the mixing of the unburned fuel with the primary combustion flame and primary air is promoted, and the unburned fuel is reliably vaporized and completely combusted.
Ru. In particular, since the shielding plate 10 is heated to a high temperature by the flame of the primary combustion after a predetermined period of time has elapsed after ignition, the vaporization of the unburned fuel sprayed onto the shielding plate 10 is promoted, making it more reliable and effective. can be completely combusted. Furthermore, if the baffle plate 13 provided in front of the shielding plate 10 blocks the flow of the secondary combustion gas, the effect of promoting combustion behind the baffle plate 10 can be further improved.

In this way, the unburned fuel is drawn out from the primary combustion chamber 11 together with the primary combustion flame and the primary air by the suction force generated by the secondary air flow, so that the Combustion can be effectively continued without blowing air into large or small areas or installing a large chimney. Therefore, it is possible to prevent unburned fuel from being blown away or explosive combustion to occur, which occurs when primary air is blown from the rear of the cylinder 1, and also to prevent the occurrence of Since this becomes unnecessary, the device can be made smaller. Note that the decompression effect at the rear of the cylinder due to the secondary air flow increases as the distance 111A between the front end of the cylinder 1 and the front end of the secondary air supply section 17 increases. It is desirable to set retirement according to the nature of the situation and the degree of drunkenness.

The combustion gas led outward from the through hole 9 of the rear cylinder body 5 contacts the peripheral wall of the front cylinder body 3 and transfers heat to the heat dissipation fins. After the tertiary air supplied from the end comes into contact with the radiation fins 18 and is heated, it is mixed with the combustion gas supplied from the front end of the front cylinder 3 and reaches a predetermined temperature, which is used for greenhouses, etc. supplied to

The radiation fins 18 serve to heat the tertiary air and to cool the front cylinder 3, thereby preventing the cylinder 1 from being burnt out. In addition, in order to prevent heat loss due to the heat transferred to the heat dissipation fins 18 being dissipated to the outside, it is necessary to It is desirable to provide a predetermined gap. In addition, if it is necessary to bring the mantle tube 2 and the radiation fins 18 into contact with each other, a heat insulating shrine is interposed between the two.
All you have to do is make it so.

Note that the heating combustion device according to the present invention is not limited to a hot air heater, but can also be used as a heating device such as a boiler or a pottery furnace, or a hot air supply source for a dryer. Also,
The radiation fins 18 may be omitted and a water supply pipe such as a boiler may be arranged around the outer periphery of the cylinder 1, or the mantle pipe 2 may be omitted and the front end of the cylinder 1 may be directly connected to the object to be heated. Good too.

Furthermore, when using a fuel that is particularly difficult to vaporize, such as heavy oil, an oil-impregnated body made of asbestos cement or alumina ceramic material with many pores is provided on the inner surface of the shielding plate 10, etc. The structure is such that the fuel is reliably vaporized by heating the oil-impregnated body in a state in which the fuel is impregnated with the fuel. Even when this oil-impregnated body is installed, the suction force is exerted by the secondary air flow, so the soot adhering to the oil-impregnated body is actively discharged, and the oil-impregnated body is prevented from becoming clogged. can be reliably prevented.

In addition, instead of the fire explosion chamber 11 described above, as shown in FIG. A pair of front and rear partition walls 12a.

12b and the rear end of the front cylinder 3 are provided with a primary combustion chamber 11a equipped with a vaporization chamber 15 surrounded by J:, and unburned fuel is introduced into the vaporization chamber 15 and vaporized. After that, it is injected into the rear cylinder body 5, and brought into contact with the primary air accumulated in the front N part of the rear station body 5 and the primary combustion flame to cause secondary combustion. It may be configured to derive the value within 3.

Further, as shown in FIG. 5, a through hole 14 and a vaporization chamber 15 are provided at a position corresponding to the injection port of the fuel injection nozzle 6, and a constriction section 16 made of a plurality of pipe materials is provided in front of the hole 14 and the vaporization chamber 15. The constricted portion 16 may be made to act as a flow resistance imparting member that obstructs the flow of the flame of the secondary combustion, the primary air, etc. Furthermore, an internal cylinder body 2o whose tip end is covered with a shielding plate 10 is installed in front of the aperture part 16,
- By configuring the internal cylinder 2o so that the flame of the next combustion is retained, it is possible to completely burn hard-to-burn fuel such as kerosene in a shorter flow path.

In addition, as shown in FIG. 6, a pair of front and rear partition plates 23 with a large number of through holes 21 and 22 are provided in front of the fuel injection nozzle 6.
．． 24, a large number of heat-resistant oil-impregnated bodies 25 are filled in the space partitioned by the partition plates 23 and 24, and the oil-impregnated bodies 25 are impregnated with unburned fuel and heated to promote vaporization. In addition, the oil-impregnated body 25 may be used as a flow resistance imparting member that obstructs the flow of the flame of the above-mentioned combustion and the primary air.

Further, as shown in FIG. 7, if a gap is formed between the outer circumferential surface of the partition plate 8 and the cylindrical body 1, a mausoleum plate 26 is provided protruding in front of the gap, and this baffle plate It is desirable to prevent unburned fuel from being blown away by obstructing the flow of primary air at 2G, and to promote retention and combustion of unburned fuel in the combustion chamber.

In addition, instead of introducing the tip of the blast pipe 4 into the cylinder 1 to form the secondary air supply section 17, secondary air is supplied from the periphery of the cylinder 1 toward the front of the cylinder 1 through a large hole. However, the rear part of the cylindrical body 1 may be configured to be depressurized by this secondary air flow.

(Effects of the Invention) As explained above, the present invention can reliably vaporize and completely burn fuel that is difficult to vaporize, such as kerosene, using a simple and compact device, and can obtain excellent thermal efficiency. - Since the generation of excessive gas such as carbon oxide can be reliably prevented, this combustion device can be used safely even in a closed room such as a greenhouse for greenhouse cultivation. Moreover, since it is possible to completely burn heavy oil and generate enough carbon dioxide necessary for the growth of plants, it has a particularly excellent advantage as a hot air heater for the above-mentioned greenhouse. However, it has the advantage that it can be operated continuously for a long time without clogging, burnout, or other malfunctions.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the heating combustion device according to the present invention, FIG. 2 is a sectional view taken along the line II-I in FIG. 7 to 7 are sectional views showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 6... Fuel injection nozzle, 9... Through hole, 10... Shielding plate, 11...-Fire explosion chamber, 16...
- Restricted part, 17... Secondary air supply part, 25... Heat-resistant oil-impregnated body.

Claims (1)

[Claims] 1. A cylindrical body whose front end is open and whose rear end communicates with a source of primary air, and a fuel injection nozzle disposed at the rear end of the cylindrical body. A primary combustion chamber is provided with a flow resistance imparting member that obstructs the flow of the injected fuel and primary air, and in front of the primary combustion chamber, secondary air is injected toward the front end opening of the cylinder to close the rear part of the cylinder. A heating combustion device characterized by being provided with a secondary air supply section that reduces pressure.