JPH03251611A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To reduce the ignition sound and prevent the generation of a large amount of soot in a subject device provided with two gun type burners of different capabilities by igniting at first the burner with larger capability and then igniting the burner with smaller capability with a little delay. CONSTITUTION:When two burners 20 and 30 are started to operate at the same time, a control section 70 turns ON a solenoid pump 40 and blower fan 50, and at the same time a solenoid opening and closing valve 31 and an ignitor 34 on the side of a gun type burner 30 with large capability are turned ON and the burner 30 is ignited. And, with delay of several seconds a solenoid opening and closing valve 21 and an ignitor 24 on the side of a gun type burner 20 with small capability are turned ON and the burner 20 is ignited. With this constitution the burner are easily ignited with the force to jet out the fuel that is small until the discharge quantity of the solenoid pump 40 reaches steady state, and the ignition sound and the generation of soot can be suppressed, and soft ignition can be made.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid fuel combustion apparatus equipped with two gun-type burners having different capacities.

<Prior art and its problems> Conventionally, in a liquid fuel combustion device equipped with two gun-type burners, when the two burners are started at the same time, both burners are ignited at the same time, and as a result, the ignition noise becomes louder. There was also the problem that a large amount of soot would come out at once when igniting.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a liquid fuel combustion device that does not cause loud ignition noise or emit a large amount of soot even when two burners are started at the same time.

<Means for Solving the Problems> In order to achieve the above object, the liquid fuel combustion device of the present invention has two gun-type burners with different capacities, and one electromagnetic pump operates the on-off valves of each of the burners. In a liquid fuel combustion apparatus in which liquid fuel is supplied through a burner, when simultaneous operation of the two burners is selected,
At the same time as the electromagnetic pump is turned on, the on-off valve on the large-capacity side is first opened to ignite the burner on the large-capacity side, and then, with a slight delay, the on-off valve on the small-capacity side is opened to ignite the burner on the small-capacity side. It is characterized by being configured to

<Operation> According to the feature of the present invention described above, even when simultaneous operation of two burners is selected, the two burners are ignited with a slight time difference, so the ignition sounds are not added, and a large ignition sound is not generated. is suppressed. Further, the soot generated at the time of ignition is not a problem because the two soots are not temporarily added together.

It should be noted that an electromagnetic pump requires some time from startup until it reaches a steady state, and during that time the supply amount gradually increases from small to large. Therefore, if the burner is ignited during this period, a so-called "soft ignition effect" will be activated, in which ignition is easier and less noise and soot are generated. Therefore, in the feature of the present invention described above, since a configuration is adopted in which the burner on the higher capacity side is ignited first, the soft ignition effect can be fully enjoyed.

If the burner on the small capacity side is ignited first, the soft ignition effect will not work on the burner on the large capacity side that is ignited later.
The ignition noise becomes louder and more soot is produced.

<Example> FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention.

A small-capacity gun-type burner 20 and a large-capacity gun-type burner 30 having a larger capacity than the small-capacity gun-type burner 20 are arranged vertically in vertical positions on the side wall 11 of the combustion chamber 10.

A heat exchanger 12 for hot water supply is provided in the combustion chamber 10,
It can be a water heater.

Kerosene, which is a liquid fuel, is supplied from a tank (not shown).
The kerosene sent by the two electromagnetic pumps 40 is branched into two paths, respectively! This is done by ejecting from gun type nozzles 22, 32 through separation valves 21, 31, respectively. Further, each burner 20.30 is provided with an igniter 23.33, so that each burner can be ignited independently. 24.34 is each igniter 2
It is a 3.33 igniter.

Air is supplied to each burner 20.30 by feeding air into the burner case 60 by one blower fan 50.

Reference numeral 70 denotes a control unit that controls the two electromagnetic on-off valves 21, 31, the two igniters 24, 34, the electromagnetic pump 40, and the blower fan 50 in response to operation start and stop command signals from the user from an operation unit (not shown). .

The control unit 70 turns on the electromagnetic pump 40 and the blower fan 50 when the independent operation switch of the small capacity gun type burner 20 is turned on by the operation unit, and also controls the electromagnetic opening/closing of the 20 small capacity gun type burners. Valve 21 and igniter 2
Turn on 4. As a result, the small capacity gun type burner 20
is ignited and burned independently.

Similarly, the control unit 70 turns on the electromagnetic pump 40 and the blower fan 50 when the independent operation switch of the large capacity gun type burner 30 is turned on at the operation unit, and also controls the electromagnetic opening/closing of the large capacity gun type burner 30 side. Valve 31 and igniter 34
Turn on. As a result, the large capacity gun type burner 30 is ignited and burns independently.

Further, the control unit 70 controls the electromagnetic pump 40,
The blower fan 50 is turned on, and at the same time, the electromagnetic on-off valve 31 and igniter 34 of the 30 large capacity gun type burners are turned on. Then, after a delay of several seconds, the t-release valve 21 and igniter 24 on the small capacity gun type burner 20 side are
Turn on. As a result, the large-capacity gun-type burner 30 is ignited first, and a few seconds later, the small-capacity gun-type burner 20 is ignited. The delay of several seconds may be achieved by adding a delay circuit or the like to the control section 70.

The discharge amount of the electromagnetic pump 40C gradually increases from the start of operation, and it takes several seconds (for example, about 3 seconds) to reach a steady state. Therefore, during that time, the amount of fuel ejected from the nozzle 22.32 also starts from a small amount and increases. Therefore, if the fuel is ignited during this period, the fuel injection force is small and the ignition is easily carried out, and the so-called "soft ignition effect" is activated, in which the ignition noise and soot generation are suppressed.

The soft ignition effect works not only when the burner is operated alone, but also when two burners are operated simultaneously. In that case, the soft ignition effect is more effective when the capacity of the burner is large. That is, when the burner capacity is large, the fuel injection force is also large, which tends to increase the ignition noise and the generation of soot at the time of ignition.

In the present invention, when two burners are started at the same time, the large capacity gun type burner 30 is ignited first, so that the soft ignition effect can be fully enjoyed. Although the soft ignition effect does not work on the small capacity gun type burner 20 that is ignited later, it is ignited smoothly because its capacity is small and the other burner is burning.

If two burners are started to operate simultaneously in the reverse order of the present invention, the soft ignition effect will not work on the large capacity gun type burner 30 that is ignited later, and the ignition noise will be loud and the amount of soot will be increased. There will also be more.

Effects> The present invention has the above configuration, and according to the liquid fuel combustion apparatus according to claim 1, when simultaneous operation of two burners is selected, the burner on the higher capacity side is ignited first. , and then the small capacity side burner is ignited with a slight delay, so
The ignition sounds of both are not added, and the ignition sounds can be suppressed. Similarly, soot does not occur all at once, causing no problems. Furthermore, since the burner on the high-capacity side is slightly ignited by light, the soft ignition effect of the electromagnetic pump can also be enjoyed, and the suppression of ignition noise and soot generation can be made even more effective.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention. 10: Combustion chamber 20: Small ability gun type burner 30: High ability gun type burner 21.31: Solenoid on-off valve 22.32; Gun type nozzle 23.33: Igniter 24.34: Igniter 40: Electromagnetic pump 50:Blower fan 70: Control unit

Claims (1)

[Claims] (1) Has two gun type burners with different capabilities,
In a liquid fuel combustion apparatus, in which liquid fuel is supplied by one electromagnetic pump through an on-off valve for each of the burners, when simultaneous operation of the two burners is selected, the electromagnetic pump When the power is turned on, the on-off valve on the high-capacity side is first opened to ignite the burner on the high-capacity side, and then after a slight delay, the on-off valve on the low-capacity side is opened to ignite the burner on the low-capacity side. A liquid fuel combustion device characterized by: