JPS5811310A - Combustion device - Google Patents

Abstract

PURPOSE:To carry out homogeneous and uniform combustion extending over a whole surface area of an impregnated body, by adhering closely a fixing plate having a hole which is coaxial with a flame nozzle of the impregnated body and, compared with the flame nozzle of the impregnated body, is equal to or larger than the same provided to upstream of the impregnated body. CONSTITUTION:An impregnated body 1 is secured by a fixing plate 11 and a flame nozzle fixing plate 12 through a flame nozzle plate 13 and a supply pipe 2 is attached to its upper part. Kerosene supplied from the supply pipe 2 permeates into the inside of the impregnated body 1. Heated air supplied from the right side passes through a flame nozzle 1a of the impregnated body. The fixing plate 11 is provided to stick tightly to the impregnated body 1, a hole 11a of which, moreover, is provided coaxially with the flame nozzle 1a of the impregnated body so that it becomes a little larger than the flame nozzle 1a of the impregnated body. Thus, mixed gas is well-balanced generating a blue fire for uniform combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device that vaporizes and burns liquid fuel.

Conventional combustion devices that vaporize and burn liquid fuel generally heat a metal hot plate with a heating device such as a heater.
Kerosene is vaporized by dropping it onto a sufficiently heated area, or vaporized by bringing kerosene particles into contact with a hot plate using a rotating jet, etc.
In many cases, this vaporized fuel and air are mixed, the mixture is transported, and ignited and burned at a flame opening provided elsewhere.

Therefore, in such a combustion device, due to the heat capacity of the hot plate, there is a disadvantage that it takes about 5 minutes to preheat the hot plate until the temperature of the hot plate reaches approximately 250"C. Therefore, it is necessary to reduce the heat capacity of the hot plate. However, because of this, the volume of the vaporization chamber for vaporization is small, and the vaporization chamber is filled with tar mainly generated by kerosene that has deteriorated due to oxidation and deterioration of kerosene or kerosene mixed with high-boiling seafood as impurities. However, there was a problem that the tar had poor heat conduction and did not evaporate, resulting in clogging.

Therefore, the present inventors have developed a combustion device in which a flame port is formed of an impregnated body and hot air is supplied to the impregnated body to vaporize and burn the fuel in the impregnated body. FIG. 1 shows an outline of this combustion apparatus, where ``■'' is an impregnated body serving as a flame port, ``2'' is a supply pipe that supplies fuel to the impregnated body ``2'', ``■ is a heater, and [phase] is a burner fan. This combustion device can vaporize the fuel by simply heating the air from the fan (■) into hot air using the heater (■), so the time it takes to start combustion is extremely short, eliminating the drawbacks of the conventional combustion equipment mentioned above. .
.

The present invention relates to the configuration of the flame port of such a combustion device, and is aimed at enabling uniform combustion without unevenness over the entire surface of the impregnated body.

An example of this will be explained below with reference to the drawings. Figure 2 shows the following:
FIG. 1 is a longitudinal cross-sectional view of a household oil hot air heater (i) showing an embodiment of the present invention. At the bottom of this heater, there is an oil tank to store kerosene, and an oil pump to supply the kerosene.
, a supply pipe ■ is provided. The air sent by the burner fan ■ is heated by the heater ■ and the impregnated flame opening 1
Kerosene is supplied through the supply pipe 1 to the 0-impregnated flame port 1a, where it is vaporized, mixed, and burned using the heat exchanger 2 as a combustion chamber. The electrode ■ is provided for ignition, and the heating fan [phase] K
Yes, heated air and combustion gas are supplied into the room,
Heated.

FIG. 3 is a sectional view of the impregnated body. The impregnated body ■ is fixed by the fixing plate ■, the flame nozzle, and the fixed plate ■ via the flame nozzle plate, and the supply pipe ■ is attached to the top of the impregnated body. The kerosene supplied from the I pipe [phase] penetrates into the inside of the impregnated body ■.From the right side in Figure 3, the heated air is supplied and leaves the impregnated body flame port inside the impregnated body ■. 1a becomes clear 0 At this time, the impregnated body ■
The fixed plate @ provided in the impregnated body ■ is provided in close contact with the impregnated body ■, and the hole 11a made in the fixed plate ■ is coaxial with the impregnated body flame opening 1a provided in the impregnated body ■, and the hole 11a made in the fixed plate It looks like it's going to be big. This means that if the impregnated body ■ is directly exposed when the kerosene impregnated inside the impregnated body ■ is vaporized by the hot air from the right in Figure 3,
This is to eliminate yellow flame, soot, etc. caused by the fuel being vaporized from the entire surface of the impregnated body (2) and the vaporized combustion passing through the impregnated body (2) in a partially biased manner. In other words, if the fixing plate (■) is provided closely as in the present invention, this problem will not occur.
The balance of the gas mixture is maintained, resulting in a blue flame and uniform combustion.

The impregnated body (2) also has many holes 13a on its downstream surface.
Since the flame outlet plate 0 with the flame outlet plate 0 is installed in close contact with the flame outlet plate 0, fuel vaporization from the impregnated body 0 surface that is in contact with the non-porous part of the flame outlet plate 0 is very rapid.
As a result, the ratio of air and vaporized fuel becomes appropriate, resulting in efficient combustion. Furthermore, in this case, the hole 13a of the upper flame-generating plate [phase] is provided coaxially with the impregnated body flame port 1a of the impregnated body ■, so that the ratio of vaporized fuel to air is more uniform over the entire area of the impregnated body ■. This ensures even and good combustion. In other words, if the hole 13a of the flame port plate (13) and the impregnated body flame port 1a of the impregnated body (2) are misaligned, the ratio of air and vaporized fuel will not be appropriate where the holes 13a and 1a of the two bodies match. However, if there is a misalignment, there may be too much fuel, and yellow flames may appear in some areas.
This results in uneven combustion, such as the generation of soot, etc.
If the flame port plate 0 and the holes 13a and 1a of the impregnated body (2) are made to coincide with each other, there will be no such problem and combustion will be almost uniform throughout the entire area of the impregnated body (2). Furthermore, the flame outlet fixing plate ■ has come out from hole 13a of the flame outlet plate ■! This has the effect of spreading the flame throughout and stabilizing it because it disturbs the flow of the mixed gas of fuel and air.

FIG. 4 is an enlarged cross-sectional view of heater (2). The heater element East, whose main component is barium titanate, is fixed with an electrode cover [Co., Ltd.] to prevent air leakage, and is equipped with a lead wire O for energizing the electrode cover [phase]. It heats the air that is sent to it. This heater element [
phase] has a small electrical resistance value between the front and back surfaces at low temperatures;
The electrical resistance value tends to increase at high temperatures. Therefore, when this heater element 0 is energized, a large current flows due to its small electrical resistance value initially, and the temperature rises quickly.
The electric resistance value increases rapidly due to the temperature rise caused by the heat generation, so when compared to other heaters, the final heater capacitance when the temperature rise is saturated has the advantage of fast startup because a large current flows as described above. Since it has the advantage of self-temperature control, it also has the advantage of being inexpensive and economical because it does not require temperature detection elements such as thermostats or thermistors or control electric circuit components for temperature control. Therefore, if a heater is used as the heater (2), the time until combustion starts will be further shortened. Further, another embodiment of the present invention will be described below, which has the effect of making it possible to design an inexpensive and economical system.

Figures 6 and 6 show FF type oil hot air heater [phase],
It is @. In both cases, the air sent from the Nocuna fan [phase] is heated by combustion heat and 1. Indicates that it will go to the heater ■. In the embodiment shown in FIG. 6, the burner fan ■
Combustion air is taken in from outside the heater [phase] and sent to the air supply and exhaust heat exchanger. In the air supply and exhaust heat exchanger ■, the heat from the combustion exhaust gas is heated by 7 (-), and the air sent from the Nafan ■ is sent to the heater ■.In the heater ■,
The temperature at which the heated air further vaporizes kerosene is approximately 250°C.
It is heated to above temperature, sent to the impregnated body ■, burned, and then heated to
After passing through the heat exchanger header @, heat exchanger / pipe ■, and air supply/exhaust heat exchanger [existence], it is discharged to the outside of the warm gate machine μs. Here, if the heater ■ is titanate titanate, when air heated by the air supply and exhaust heat exchanger [Co., Ltd.] is introduced, the electrical resistance value of the heater element 0 decreases, and as a result, the heater element ■
The temperature of the air afterwards does not change much, but instead the current value going to the heater decreases.Currently, kerosene is considerably cheaper to generate the same amount of heat, so it is better to use as little electricity as possible. It has the advantage of reducing the maintenance costs of the Power Zeta Heating Machine Co., Ltd., and by lowering the temperature of the exhaust gas as much as possible, the combustion efficiency of the heating machine increases, contributing to energy conservation. In the embodiment shown in Fig. 6, the heat exchanger pipe ■ is connected from the burner fan ■ to the heater ■
The air from the burner fan (2) is heated by the penetration of the burner fan (2), and the effect is as described above.

Furthermore, as another embodiment of the present invention, FIG. 7 shows an FF type oil hot air heater.

In this embodiment, the supply and exhaust air is taken in from the supply and exhaust intake port, and the supply and exhaust pipes are installed as shown in Fig. 8.
is attached to the air supply/exhaust intake, and has the same effect as above.

In all of the above examples, the impregnated body (2) was made of a fibrous material mainly composed of alumina or silica, but it may be of any material as long as it can be penetrated by kerosene and through which air can pass. . However, for practical purposes, it is desirable to use a material that can withstand high temperatures and that does not have the catalytic effect of metals such as nickel or iron or their compounds that produce tar.

In this respect, alumina and silica act as carriers for the catalyst and have a small catalytic effect. Also, although the flame port fixing plate (■) has the role of expanding the flame, the combustion will be uniform even without it.

In addition, although a household heater is used as an example here, auto furnaces for central heating, hot water boilers,
It may also be a burner for other types of heating, hot water supply, etc. equipment. Also, although it has been explained as a household heater, the oil tank may be installed separately and may be equipped with a leveler.
A cartridge tank or the like may also be used. In addition, the heating fan
Although it is assumed to be a Globera fan, it may be a Scirocco fan or any other fan. Furthermore, although FIG. 2 is explained using a fan heater, an FF type oil hot air heater may also be used. Also, although the heater was explained using a barium titanate heater element,
A sheathed heater, ceramic heater, etc. may also be used. The kerosene is supplied to the impregnated body using a pipe as an example, but the kerosene may be supplied directly to the center without dripping from the top.

As described above, the present invention has great effects as a vaporizing burner, such as quick start-up, good energy efficiency, contributing to energy saving, and even and uniform combustion.

[Brief explanation of drawings]

Figure 1 is a basic configuration diagram of a combustion device using an impregnated body, Figure 2
The figure is a front sectional view of an oil hot air heater that is an embodiment of the present invention, FIG. 3 is an enlarged sectional view of the main part of the combustion device, FIG. 4 is an enlarged sectional view of the heater, FIG. 7 is an FF type oil hot air heater according to another embodiment of the present invention, and FIG. 8 is an enlarged sectional view of a main part of the supply and exhaust pipe of FIG. 7. 1... Impregnated body, 1a... Impregnated body flame mouth,
2... Supply pipe, 3... Heater (air heating device). 4... Burner 7 Ann (Blower), 6...
・・Oil tank, 7・・・・Oil pump, 8・
...Heat exchanger, 11...Fixing plate, 11a
...... Hole in fixing plate 11, 12... Burner port fixing plate, 13... Burner port plate, 13a... Hole in burner port plate 13, 14... Heater element (electric heating element), 20... Supply/exhaust heat exchanger, 23...
...Air blower/kuib, 26... Supply and exhaust pipe. Name of agent: Patent attorney Toshio Nakao and one other person II
l Figure 2b

Claims (1)

[Scope of Claims] (1) A blower device that supplies air for burning liquid fuel; an air heating device that is located downstream of the blower device and heats the air supplied from the blower device; A combustion device comprising: an impregnated body located downstream of the air heating device, containing liquid fuel and having a plurality of holes therein; and a fuel supply device for supplying the liquid fuel to the impregnated body; A combustion device characterized in that a fixing plate is closely disposed on the side thereof and is coaxial with an impregnated flame port provided in the impregnated body and has a hole that is the same as or larger than the impregnated flame mouth. (2) The combustion device according to claim 1, wherein the impregnated body has a flame port plate having a hole coaxial with the impregnated body flame port of the impregnated body, which is closely arranged on the downstream surface of the impregnated body. (31) Claim 1, characterized in that a metal flame port fixing plate for disturbing the airflow is provided in close contact with either or both downstream of the flame port plate or upstream of the fixing plate. (4) Barium titanate, which has a multi-temperature self-control property whose electrical resistance increases when the air heating device reaches a high temperature. (6) A heat exchanger is provided downstream of the combustion chamber, and Part or all of the air passes through the air pipe, and the air sent from the air blower to the air heating device passes through the air pipe, and during combustion, the combustion exhaust gas is sent through the heat exchanger. provide an exhaust pipe downstream of the heat exchanger before the heat of the
The above air supply is made of fibers mainly composed of silica and alumina.