JPH02259314A - Petroleum combustion device - Google Patents

Abstract

PURPOSE:To provide a stable initial combustion by a method wherein a gasifying device heating heater is controlled for its turned-on or off state for a specified period of initial igniting time in such a way as a temperature of the gasifying device is kept at a lower temperature than that of a normal operation. CONSTITUTION:As an operating switch not shown is turned on by a remote controller 9, a gasifying heater 3 is turned on through a control part 8, and a heater-ON temperature of the heater-ON, OFF control under the control part 8 is set to a lower ignition initial heater-ON temperature. As a temperature sensor 7 identifies that a temperature of a gasifying device 2 reaches the ignition initial heater-ON temperature, an electromagnetic pump 1 is turned on through the control part 8 so as to supply petroleum and then the petroleum is ignited. At the initial state of ignition, the ON-OFF operation time is set by a timer and the initial ignition ON-OFF operation is carried out. After passing the timer set time, the operation is changed over to a normal operation. With such a configuration as above, it is possible to make a stable initial combustion.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an oil combustion device that vaporizes kerosene in a vaporizer and sends it to a burner side for combustion. It relates to something that can be used as a combustion device.

<Prior art and its problems> Conventionally, in oil combustion equipment that controls the temperature of the vaporizer while vaporizing the sent kerosene and sends it to the burner for combustion, the temperature of the vaporizer is controlled by the ignition of the burner. Regardless of whether it is in the initial stage or not, the heater is turned on and off to maintain a constant temperature.

However, in the early stages of ignition, the burner itself has not yet been heated, so the vaporized gas sent from the vaporizer side re-liquefies within the burner, resulting in excess primary air mixed in with the vaporized gas. As a result, combustion was likely to become unstable, such as flame lift or burner red-hot heating.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the drawbacks of the prior art described above and provide an oil combustion device that can perform stable combustion even in the initial stage of ignition.

Means for Solving the Problems> In order to achieve the above objects, the oil combustion device of the present invention includes a vaporizer for vaporizing the kerosene sent therein, a heater for heating the vaporizer, and the vaporizer for heating the vaporizer. The oil combustion device is equipped with a discharge nozzle for discharging the vaporized gas to the burner side, and the vaporized gas is sent to the burner side for combustion while controlling the temperature of the vaporizer by on/off heating control by the heater. The present invention is characterized in that the heater is controlled on and off so as to keep the temperature of the vaporizer lower than during normal operation for a certain period of time at the initial stage of ignition.

For a certain period of time at the beginning of ignition, the temperature of the vaporizer is maintained lower than during normal operation, so during that time, the amount of vaporized gas generated in the vaporizer is small and the temperature is also low, causing the discharge nozzle to flow from the burner. The flow rate of the vaporized gas discharged inward is also low, and therefore the amount of primary air mixed into the vaporized gas at the time of discharge is also reduced.

Therefore, not only is it easy to ignite, but combustion instability such as flame lift due to excess air is eliminated, and re-liquefaction of vaporized gas is also prevented. In other words, in the present invention, during the initial period when the conditions on the burner side are set, the capacity of the carburetor is matched with that on the burner side, thereby making it possible to balance the two conditions (and ensuring good combustion from the initial stage of ignition). This is what is being done.

<Embodiment> FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention, FIG. 2 is an operation time chart of the apparatus after the operation switch is turned on, and FIG. 3 is an operation control flowchart after the operation switch is turned on.

1 is an electromagnetic pump that sends oil from a tank (not shown) to a carburetor 2. The vaporizer 2 is provided with a vaporization heater 3 for heating the vaporizer 2. The oil vaporized in the vaporizer 2 becomes a gas and enters the discharge nozzle 4, and is discharged from the nozzle opening 4a of the discharge nozzle 4 toward the burner 5, where it is combusted.

A needle valve 6 is provided within the discharge nozzle 4.

This needle valve 6 is movable forward and backward by a solenoid portion 6a, and when advanced, it enters into the nozzle opening 4a of the discharge nozzle 4 and closes. The figure shows a state in which the needle valve 6 is retracted to open the nozzle port 4a. A temperature sensor 7 can detect the temperature of the vaporizer 2. A control section 8 receives commands from the remote controller 9, inputs information from the temperature sensor 7, etc., and sends operation commands to the electromagnetic pump 1, vaporization heater 3, solenoid section 6a, etc.

The vaporizer 2 is heated by the vaporization heater 3 in an on-off heating operation, and the content of the on-off heating operation is divided into an initial period of ignition of the burner 5 and a subsequent normal operation. That is, the heater-on temperature during the on-off operation during a certain period of time in the initial stage of ignition is set lower than the heater-on temperature during normal operation.

For example, if the heater-on temperature during normal operation is set to 280°C and the heater-off temperature is set to 285°C, the heater-on temperature at the beginning of operation is set to 240°C and the heater-off temperature is set to 285°C.
℃. By lowering the heater-on temperature at the beginning of operation in this way, the amount and temperature of vaporized gas generated are lower than normal, thereby supplying vaporized gas suitable for the warming-up period at the initial stage of ignition on the burner 5 side. It is said that

The operation will be further explained with reference to FIGS. 2 and 3.

Now, when the operation switch is turned on by the remote control 9 (
b) The vaporization heater 7 is turned on via the control unit 8, and the heater-on temperature of the heater on-off control in the control unit 8 is set to the ignition initial heater-on temperature (240°C). When the temperature of the vaporizer 2 reaches the initial ignition heater-on temperature (240°C) (c)
, the electromagnetic pump 1 is first turned on via the control unit 8 (2),
The supply of kerosene is started, thereby generating vaporized gas within the vaporizer 2, which is sent to the inside of the discharge nozzle 4. After a while after turning on the electromagnetic pump 1,
The igniter for igniting the burner 5 (not shown) is turned on, the needle valve 6 is turned on and opened, and the vaporized gas that has entered the burner 5 is ignited (e). A timer is set for the ignition initial on/off operation time (60 seconds) by the control unit 8, and the ignition initial on/off operation is started. For a certain period of time (60 seconds) after this ignition, the heater 3 is turned off at the same temperature (285°C) as during normal operation, but the heater on temperature is the off temperature (285°C) during normal operation.
0°C) and lower temperature (240°C). Therefore, once the heater 3 is turned off, the time until it is turned on again becomes longer, and the temperature of the vaporizer 2 as a whole becomes lower. Since the temperature of the vaporizer 2 is lower than normal, the amount and temperature of vaporized gas generated are also low for a while after ignition, and therefore the flow rate of the vaporized gas discharged from the discharge nozzle 4 to the burner 5 becomes slow, and - Next, the amount of air mixed in is also reduced. Therefore, not only is it easy to ignite, but also re-liquefaction of vaporized gas is suppressed, and combustion instability such as flame lift due to excess air is prevented.

While the ignition initial on-off operation continues for a certain period of time, the temperature of the burner 5 also rises, and the situation of combustion instability due to re-liquefaction of vaporized gas is resolved, so after a certain period of time has passed after ignition,
The heater-on temperature in the control unit 8 is switched to the normal heater-on temperature (280° C.) (g), and normal on-off operation is thereafter performed (ch).

In addition, in the above embodiment, the heater-on temperature was lowered during the initial ignition on-off operation, but in short, the temperature of the vaporizer is kept lower than during normal operation for a while after ignition, and from this point of view, the heater-on temperature is lowered for a while after ignition. Not only the temperature but also the heater-off temperature may be low at the initial stage of ignition.

Effect> The oil combustion device of the present invention has the above configuration, and the heater is controlled on and off to keep the temperature of the vaporizer lower than during normal operation for a certain period of time at the initial stage of ignition. Until it is heated, the flow rate of the vaporized gas discharged to the burner side is slowed down, the amount of secondary air mixed in is reduced, and combustion instability such as flame lift phenomenon is prevented. Further, re-liquefaction of the vaporized gas is suppressed. That is, stable and good combustion can be performed even in the initial stage of ignition.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention, FIG. 2 is an operation time chart of the apparatus after the operation switch is turned on, and FIG. 3 is an operation control flowchart after the operation switch is turned on. 1: Electromagnetic pump 2: Vaporizer 3: Vaporization heater 4: Discharge nozzle 5: Burner 7: Temperature sensor 8: Control unit 9: Remote control Figure 3

Claims (1)

[Claims] (1) It is equipped with a vaporizer that vaporizes the kerosene that is sent, a heater that heats the vaporizer, and a discharge nozzle that discharges the gas vaporized by the vaporizer toward the burner, and is turned on and off by the heater. This is an oil combustion device that sends vaporized gas to the burner side for combustion while controlling the temperature of the vaporizer through heating control, and the temperature of the vaporizer is lower than during normal operation for a certain period of time at the initial stage of ignition. An oil combustion device characterized in that it is configured to perform on/off control of a heater so as to maintain the temperature.