JPH01147204A - Liquid-fuel humidifying combustion apparatus - Google Patents

Abstract

PURPOSE: To increase combustion efficiency while saving fuel by disposing an ultrasonic humidifier having an oscillator between a vaporizer and a fan and supplying water particles atomized through the humidifier to the vaporizer along with the air. CONSTITUTION: An ultrasonic humidifier 5 having an oscillator 13 is disposed between a vaporizer 2 and a fan 3 and a secondary air supply pipe 14 passing the mixture of water particles atomized through oscillation of the oscillator 13 and the air is coupled between the humidifier 5 and a cooling tube 7. The mixture of air being supplied through the primary and secondary air supply pipes and fine water particles from the humidifier enhances combustion efficiency to realize perfect combustion. Consequently, generation of noxious components in exhaust gas, i.e., nitrogen oxides, sulfates, carbon monoxides and soot, is suppressed thus suppressing odor and realizing a comfortable environment.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a combustion device that humidifies and burns liquid fuel, and specifically relates to a vaporizer and a combustion air blower for a heater that uses liquefied fuel. The present invention relates to a liquid fuel humidification and combustion device in which an ultrasonic humidifier is installed between the exhaust gases to improve combustion efficiency and remove harmful components contained in exhaust gas.

[Conventional technology]

In general, a liquid fuel water-added mixing combustion device is a device that mixes liquid fuel and water in an emulsion state and burns it as shown in Fig. 4 (hereinafter referred to as an emulsion mixing combustion device), and a device as shown in Fig. 5. As shown in FIG. A mechanical evaporative injection mixing/combustion device (hereinafter referred to as a mechanical evaporative injection mixing/combustion device) is used.

However, such a conventional water-added liquid fuel mixing combustion apparatus has the following drawbacks.

[Problem to be solved by the invention] In other words, the conventional emulsion mixing combustion device is mainly adapted for use in industrial machinery such as large boilers;
As shown in the figure, liquid fuel and water are each stored in a fuel tank (1
) from the water tank (2) to the mixer (3) and mixed into an emulsion state, and the mixed fuel (M) in the emulsion state is mixed with air (A) and burned in the burner (4). Therefore, the installation of these devices requires a considerable amount of space, and the manufacturing and facility costs are high. Furthermore, due to the strong reducing nature of the liquid fuel and water, the emulsion state cannot be maintained for a long time, resulting in incomplete combustion and soot generation.

Furthermore, as shown in Fig. 5, the conventional mechanical injection mixing combustion device injects liquid fuel and water from a fuel tank (1) and a water tank (2) using pumps (5) and (6), respectively. Since the injected fuel (F) and the injected water (W) are mixed with air (A) and burned in the burner (4), the noise caused by the injection is loud and the injected fuel There was a drawback that complete combustion could not be achieved because the particles of (F) and injected water (W) were large.

Furthermore, as shown in FIG. 6, in the conventional mechanical evaporative injection mixing combustion device, the fuel is evaporated from the fuel tank (1) and the water tank (2) by the evaporators (7) and (8). )
(10), mixed with air (A), sent to burner (4), and burned, but the device for evaporating the fuel and water was corroded and damaged. The drawbacks are that the durability is reduced, and the evaporated water particles are large (approximately 20 to 50 cm), which reduces combustion efficiency and tends to cause incomplete combustion, and that it is difficult to adjust the amount of water supplied due to changes in heat quantity. was there.

In order to solve these drawbacks, the inventors of the present invention have conducted extensive research and have attempted to provide the following liquid fuel humidification combustion device.

[Means to solve the problem]

That is, according to the present invention, a vaporizer in which a burner is installed at the top and a blower that pressurizes and flows air are connected to a primary air supply pipe, and liquid fuel supplied from a fuel tank is stably supplied to the vaporizer. A pressurizing pipe branched from the primary air supply pipe is connected to a hydrostatic level device, and an orifice extending from the hydrostatic level device is connected to the vaporizer through the primary air supply pipe. An ultrasonic humidifier having a vibrator is installed between the vaporizer and the blower, and the fine water particles atomized by the ultrasonic humidifier are supplied to the vaporizer together with air and can be combusted. This increases combustion efficiency, saves fuel, and eliminates harmful components (
This suppresses the generation of nitrogen oxides, sulfates, carbon oxides, and soot, significantly reduces bad odors, and provides comfortable heating.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but it goes without saying that the present invention is not limited to these embodiments unless it departs from the scope of the claims.

1st Embodiment As shown in FIGS. 1 and 2, a vaporizer (2) with a burner (1) installed in the upper part, a blower (3) that pressurizes and blows air, and an internal In a liquid fuel combustion apparatus, the air in the blower (3) is provided as a primary air supply, and a hydrostatic level device (4) provided so that the oil level of the fuel is normally maintained constant. The air is introduced into the vaporizer (2) through a pipe (6), through a cooling tube (7) formed around the vaporizer (2), and from the primary air supply pipe (6) to one side. It is introduced into the hydrostatic level device (4) through a branched pressurizing pipe (8), and into the ultrasonic humidifier (5) through a connecting pipe (9) branched on the other side. It looks like this.

A fuel supply pipe (1o) for supplying fuel from a fuel tank (20) is connected to the hydrostatic leveler (4), and a fuel supply electronic pump (11) is connected inside the hydrostatic leveler (4). ) is installed, and an orifice (12) extending from the hydrostatic leveler (4) is exposed to the interior of the vaporizer (2) through the primary air supply pipe (6).

The ultrasonic humidifier (5) is provided with a vibrator (13), and the vibration of the vibrator (13) atomizes - A secondary air supply pipe in which fine water particles and air are mixed and moved. (
14) from the ultrasonic humidifier (5) to the cooling cylinder (7)
is connected to. A preheater (17) is installed around the vaporizer (2), a thermistor (18) is installed at the bottom of the vaporizer (2), and a thermistor (18) is installed at the top of the burner (1). By fixing the hydrostatic plate (19), the liquid fuel humidification combustion device and the surrounding heating mechanism according to this embodiment are configured.

In the figure, an unexplained symbol 14' indicates the secondary air supply pipe (14).
A water particle cylinder is connected to a lower end portion and an upper portion on the vibrator (13) side of the ultrasonic humidifier (5), and 15 is a pressure tube (
8) shows the solenoid valve installed in the carburetor (16).
2) is an air conditioner that adjusts the amount of air supplied to the air conditioner.

When the ignition button (not shown) is pressed, the liquid fuel humidification combustion device configured as described above turns on the electric preheating heater (1
7), the temperature of the vaporizer (2) is 230 to 240°C.
This temperature is detected by the thermistor (18) and maintained at a constant temperature. When the preheating is completed, the blower (3) and fuel supply electronic pump (11) are activated, and this process is called pre-purge. After this pre-purging process has been carried out for about 10-20 seconds, the solenoid valve (15), conventional ignition transformer, convection blower motor (not shown) etc. are energized and activated.

That is, the fuel tank (20) is pumped by the electronic pump (11).
The liquid fuel supplied from ) to the hydrostatic leveler (4) through the fuel supply pipe (10) is normally maintained at a constant oil level in the hydrostatic leveler (4), and then flows into the hydrostatic leveler (4) from the blower (3). The air is supplied to the hydrostatic level device (4) through a pressurizing pipe (8),
The fuel in the hydrostatic leveler (4) is fed to the carburetor (2) through the orifice (12) by pressurized air pressure.

In addition, a part of the air blown from the blower (3) is regulated by an air conditioner (16), and is supplied to the vaporizer (2) through the primary air supply pipe (6), and is supplied to the vaporizer (2) through the orifice (12). A nozzle (12') at one end of the pulverizes the fuel particles into fine particles and injects them. The fuel supplied in this way is fed to the carburetor (2)
The air is instantaneously vaporized by the preheating temperature of about 230 to 240°C, passes through the hydrostatic plate (19), is supplied to the burner (1), and mixes with the air that is pressure-fed from the primary air supply pipe (6). It is burned by ignition discharge.

Furthermore, the air supplied from the blower (3) to the ultrasonic humidifier (5) is passed through the water particle tube (14') at the lower end of the secondary air supply pipe (14) and is then cooled by the vibrator (13). It is mixed with atomized fine water particles of 10 or less, and passed through the secondary air supply pipe (14) to the cooling cylinder (7) of the vaporizer.
is supplied to the carburetor (2) to prevent overheating, activate combustion in the burner (1), and suppress harmful components in the exhaust gas. In addition, the humidifier (5) equipped with the vibrator (13) is normally maintained at a constant water level by a water level control valve (not shown), and the amount of humidification is adjusted by the amount of heat generated by the combustion device and the amount of fuel supplied. Ru.

In the above-mentioned combustion process, the fine water particles that are atomized by the ultrasonic humidifier (5), mixed with air, and supplied to the burner (1) through the secondary air supply pipe (14) are as follows. (1)・
It is decomposed by the reactions shown in equations (2) and (3).

H20+H−→ I(2+(il+ −−−−−−
-11------A-(1) uzo+o → OH+
011 ----------------Ring-(2)
■2 +0 → □H+ H−−−−−−−−−−−−
---(3) Then, by increasing the generation of OH groups, the OH
The group reacts with the exhaust gas CO generated during combustion as shown in the following formula (4), resulting in Co
----A--(4) Suppressing the generation of CO. and,
It suppresses the production of carbon through polymerization, significantly reducing soot and odor, and promotes complete combustion by activating combustion through minute explosions of water particles, reducing sulfide (SOX) and its underground Reduces pollutants generated by complete combustion. The amount of humidifying water added that acts in this way is 7 to 10%, and most preferably 8%.

As explained above, the liquid fuel combustion equipment according to the present embodiment performs combustion by a mixed inflow of air supplied through the primary and secondary air supply pipes and fine water particles supplied by the ultrasonic humidifier. Efficiency is improved and complete combustion is performed, suppressing the generation of harmful components in exhaust gas (nitrogen oxides, sulfates, carbon oxides and soot), reducing bad odors and creating a comfortable environment. can.

Second Embodiment FIG. 3 is a system diagram showing a liquid fuel humidification combustion apparatus according to a second embodiment of the present invention.
A part of the air blown from the air conditioner (16) is regulated by the air conditioner (16), is supplied to the ultrasonic humidifier (5) through the primary air supply pipe (6), and is atomized by the vibrator (13). 1
Liquid that is mixed with fine water particles of less than 0 feet and injected into the vaporizer (2) through the injection side (6') of the primary air supply pipe (6), and then injected from the nozzle (12''). The fuel is pulverized into fine particles and atomized.The atomized fuel is heated to the temperature of the vaporizer (2) (approximately 230 to 24
At the same time, it is exploded by the fine water particles supplied with the air and becomes an oil hydrostatic plate (19
) is supplied to the burner (1), where it is ignited and burned by an ignition discharge. On the other hand, a part of the air blown from the blower (3) passes through the secondary air supply pipe (14) and passes through the cooling cylinder (7).
) to prevent overheating of the carburetor (2) and to supply secondary air necessary for combustion.

That is, the ultrasonic humidifier (5) is connected to the middle part of the primary air supply pipe (6), and the secondary air supply pipe (14) connected to the cooling cylinder (7) of the vaporizer (2) is connected to the middle part of the primary air supply pipe (6). Directly connected to the primary air supply pipe (6), water particles atomized by the ultrasonic humidifier (5) are mixed with liquid fuel supplied to the orifice (12) and supplied to the vaporizer (2). is configured to be

Therefore, the water particles atomized by the ultrasonic humidifier (5) are directly supplied to the vaporizer (2) together with the liquid fuel, thereby further improving combustion efficiency and reducing harmful components in the exhaust gas.

Then, the filtrate particles are atomized by the ultrasonic humidifier (5), mixed with the air supplied from the blower (3) to the primary air supply pipe (6), and supplied to the vaporizer (2). In the vaporizer (2), the generation of CO is suppressed by reactions similar to the above-mentioned equations (1) to (4), and the generation of carbon is suppressed by the polymerization reaction, thereby significantly reducing soot and odor. In addition, combustion is activated by minute explosions of water particles, promoting complete combustion.
Significantly reduces the generation of pollutants such as sulfides (SOX) and nitrogen oxides (NOX).

Furthermore, fine water particles are mixed with the fuel and injected into the primary air, and by vaporizing and burning, water droplets are included in the fuel droplets, and the water droplets are heated and exploded. The fuel droplets are exploded into fine particles, and the contact area of the fuel particles with the air is increased, further improving combustion efficiency.

The amount of humidifying water added in this example is preferably 10 to 30%, most preferably 20%.

〔Effect of the invention〕

As explained above, according to the present invention, an ultrasonic humidifier is installed between the combustion air blower and the combustion burner,
The fine water particles atomized by the ultrasonic humidifier and the air from the air blower are mixed and supplied from the nozzle into the carburetor, where the atomized fuel droplets and fine water particles are mixed. Because it is explosively combusted, it has the effect of improving combustion efficiency and suppressing the generation of harmful components (nitrogen oxides, sulfates, carbon oxides, and soot). In addition, fuel costs can be saved through improved combustion efficiency and complete combustion, and unpleasant odors can be prevented due to the reduction in harmful components, resulting in comfortable heating.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a liquid fuel humidification combustion apparatus according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of the vaporizer section of FIG. 1, and FIG. A system diagram showing a liquid fuel humidifying combustion device according to an embodiment. FIGS. 4 to 6 are diagrams showing a conventional liquid fuel water-added mixing combustion device. FIG. Fig. 5 is a system diagram of a device that mechanically injects liquid fuel and water to mix and burn it, and Fig. 6 shows a system diagram of a device that mechanically injects liquid fuel and water for evaporative injection. A system diagram of a device for mixed combustion is shown. In the diagram, 1: burner 2: vaporizer 3: blower 4: hydrostatic leveler 5: ultrasonic humidifier 6: primary air supply pipe 7: cooling cylinder
8: Pressure pipe 9: Connecting pipe 12 Niorifice 13: Vibrator 14: Secondary air supply pipe 20: Fuel supply tank

Claims (1)

[Claims] 1. The vaporizer (2) with the burner (1) installed on the top is 1.
A hydrostatic level device (4) is connected to the blower (3) by an air supply pipe (6) and is used to stably supply liquid fuel supplied from the fuel supply tank (20) to the vaporizer (2). The primary air supply pipe (6) is installed in the hydrostatic plate (4).
A pressurizing pipe (8) branched from is connected, and an orifice (12) extending from the hydrostatic level device (4) passes through the center of the primary air supply pipe (6) and connects to the vaporizer (2). ), wherein a vibrator (
13) is installed, and the ultrasonic humidifier (5) is configured to supply fine water particles atomized from the ultrasonic humidifier (5) to the vaporizer (2) together with air and burn them. A liquid fuel humidification combustion device characterized by: 2. Branch a connecting pipe (9) from the primary air supply pipe (6), connect the connecting pipe (9) to the ultrasonic humidifier (5), and cool the air around the vaporizer (2). By installing a cylinder (7) and connecting a secondary air supply pipe (14) between the cooling cylinder (7) and the ultrasonic humidifier (5), the air is mixed with atomized fine water particles. Claim 1 characterized in that the air is supplied to the vaporizer (2).
The liquid fuel humidification combustion device described in . 3. Installing the ultrasonic humidifier (5) at an intermediate portion of the primary air supply pipe (6), and branching the secondary air supply pipe (14) from the primary air supply pipe (6). 2. The liquid fuel humidification combustion apparatus according to claim 1, wherein the secondary air supply pipe (14) is directly connected to the vaporizer (2).