JPH0375411A - Ignition method of gun type burner - Google Patents

Abstract

PURPOSE:To obtain a gun type burner superior in ignition property at low cost by allowing an electromagnetic proportional control valve to drive so as to open wholly or almost wholly at the time of ignition of the burner, and permitting it to lesson an oil-atomization quantity from the nozzle of a bypass nozzle. CONSTITUTION:Since an electromagnetic proportional control valve 3 change the applied voltage to its exiting coil 10 so that a degree of its opening may be changed linearly, an atomized oil quantity from a nozzle 8 can be steplessly regulated over a wide range. As the result, when a burner 7 is ignited, a large voltage is applied to an exciting coil 10 to drive the electromagnetic proportional control valve 3 so that the degree of its opening may be wholly-opened or almost wholly-opened. Accordingly, as the result a greater part of oil supplied to a nozzle with the use of an electromagnetic pump 5, an atomized oil quantity from the nozzle 8 can be lessened extremely. Thereby, a gas type burner having good ignition can be obtained at low cost.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for achieving good ignitability in a gun-type burner that sprays and burns fuel oil such as kerosene from a nozzle. .

(Prior art) An example of a conventional gun type burner is the one shown in FIG. The oil for spraying is stored in an oil tank e and is pressurized by an electromagnetic pump g and supplied to a nozzle b via an oil supply line f.

When igniting such a burner a, if there is a large amount of oil sprayed from the injection port C of the nozzle b, gradual ignition may not be achieved, a large amount of soot may be generated, a loud ignition noise may be produced, or even vibration combustion may occur. Since this type of burner a has poor ignition properties, such as the occurrence of ignition, the electromagnetic pump g of such a burner a is designed for slow ignition, and slow ignition is achieved by reducing the amount of oil sprayed at the start of combustion.

However, the electromagnetic pump g for slow ignition is generally very expensive, and therefore the cost of the burner a using it is also high.

The present invention aims to solve such problems.

Note that the reference numerals in FIG. 4 indicate oil strainers.

(Means for Solving the Problems) The means for solving the problems described above will be explained based on FIGS. 1 to 3 corresponding to Examples. The method of the present invention includes:
A bypass nozzle l is provided as an oil spray nozzle, and the bypass line 2 of this nozzle 1 is connected to the electromagnetic pump 5 of the oil supply line 4 to the nozzle 1 via the electromagnetic proportional control valve 3.
When the burner 7 is ignited, the gun type burner 7 has returned to its proper position on the upstream side of the oil tank 6 and on the downstream side of the oil tank 6.
The amount of oil sprayed from the injection port 8 of the nozzle 1 is reduced by driving the electromagnetic proportional control valve 3 to be fully open or close to fully open.

(Operation and Examples) When the fuel oil stored in the oil tank 6 is pressurized by the electromagnetic pump 5 and supplied to the bypass nozzle 1 via the oil supply line 4, a part of it is sprayed from the injection port 8. However, the oil that was not sprayed returns to the bypass line 2,
The oil flows into the oil supply line 4 via the electromagnetic proportional control valve 3, and is again supplied to the nozzle 1 by the electromagnetic pump 5. Then, the oil sprayed from the injection port 8 of the nozzle 1 is ignited by the discharge of the spark plug 9, causing the burner 7 to start combustion.

The electromagnetic proportional control valve 3 can linearly change the opening degree by changing the voltage applied to the excitation coil 10, and by controlling this, the flow from the nozzle l to the bypass yarn path 2 is reduced. The amount of recirculated oil, and therefore the amount of oil sprayed from the injection port 8, can be adjusted steplessly over a wide range.

Therefore, when igniting the burner 7, if a large voltage is applied and driven to the excitation coil 10 so that the electromagnetic proportional control valve 3 is fully open or close to fully open, the electromagnetic pump 5 can supply the nozzle 1 with a large voltage. As most of the oil flows back to the bypass line 2, the amount of sprayed oil from the injection port 8 can be extremely reduced. Therefore, if this oil is ignited by the discharge of the spark plug 9, it will be a slow ignition and ignite. It is possible to suppress the occurrence of soot, combustion noise, or vibrational combustion.

In this way, the burner 7 can be ignited slowly regardless of the output pressure of the electromagnetic pump 5, so even a relatively inexpensive electromagnetic pump 5 whose output pressure is constant from the start of operation can be used satisfactorily. It is possible.

Then, after a suitable period of time has elapsed after the burner 7 is ignited, the burner 7 can be brought into a desired combustion state by adjusting the opening degree of the electromagnetic proportional control valve 3.

(Effects of the Invention) As described above, according to the ignition method of the present invention, it is possible to slowly ignite a gun type burner without using an expensive electromagnetic pump for slow ignition, so that soot and combustion noise are generated during ignition. The present invention has the effect of providing a gun-type burner with excellent ignitability, which has little vibration and does not cause oscillating combustion, at a relatively low cost.

[Brief explanation of drawings]

Figures 1 to 3 correspond to the embodiment of the present invention; Figure 1 is an overall system diagram, Figure 2 is a time chart, Figure 3 is an explanatory diagram of main parts, and Figure 4 is a diagram of the conventional example. This is an overall system diagram. Code 1... Bypass nozzle, 2... Bypass f4.
3... Solenoid proportional control valve, 4... Oil supply line, 5
. . . Electromagnetic pump, 6. Oil tank, 7. Gun type burner, 8. Injection port, 9. Spark plug, 10. Excitation coil, 11. Oil strainer.

Claims (1)

[Claims] A bypass nozzle is provided as an oil spray nozzle, and a bypass line of the bypass nozzle is connected to the oil supply line to the bypass nozzle, upstream of the electromagnetic pump and downstream of the oil tank, through an electromagnetic proportional control valve. When the gun-type burner returns to its proper position on the side, when the burner is ignited, the electromagnetic proportional control valve is driven to a large opening that is fully open or close to fully open, and oil spray from the injection port of the bypass nozzle is caused. A method for igniting the gun type burner, characterized in that the amount of ignition is reduced.