JPH04225705A - Proportional control type atomizer burner - Google Patents

Abstract

PURPOSE:To carry out combustion under a constant proper air condition by creating an optimum air supply environment to a change in a supply amount of fuel in a wide range. CONSTITUTION:Secondary air A2 and three dimensional air A3 are supplied into a combustion chamber from a clearance between an inner cylinder 11 and an outer cylinder 12 of a combustion cylinder 10. A freely rotatable auxiliary cylinder 14 having an open hole H4 is combined with the inner cylinder 11 having air holes H2 and H3 which are equivalent to H4. The rotation position of the aforesaid auxiliary cylinder 14 is adapted to be automatically adjustable in conformity with a supply amount of fuel so that the opening degree of the air holes H2 and H3 of the inner cylinder 11 may be changed in conformity with the supply amount of fuel.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a so-called gun-type proportional control spray combustion system in which petroleum is sprayed from a fuel spray nozzle into a combustion chamber, and an amount of air proportional to the amount of fuel supplied is blown to cause combustion. Regarding machines.

0002

[Prior Art] In a conventional gun-type proportional control spray combustion machine, fuel is sprayed from a fuel spray nozzle into a combustion chamber configured in a combustion cylinder, while a blower fan sprays fuel in proportion to the amount of fuel supplied. After controlling the airflow sent from the bumper with the bumper, a part of it is sent as primary air from around the fuel spray nozzle to the combustion chamber, and the remaining air is used as secondary air and tertiary air to be sent to the inner and outer cylinders of the combustion cylinder. From there, the air is fed into the combustion chamber through secondary air holes and tertiary air holes provided in the inner cylinder. .

0003

[Problem to be Solved by the Invention] However, in the above-mentioned conventional proportional control type spray combustion machine, even if the input changes due to proportional control, the damper only controls the amount of primary, secondary, and tertiary air. , the condition of the air holes in the combustion tube does not change at all even when the input is at its minimum or at its maximum, and combustion is carried out under sufficiently suitable air for a wide range of input changes. there were.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a proportional control type spray combustor which can eliminate the drawbacks of the prior art described above and can perform optimal combustion even under a wide range of input changes.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the proportional control type spray combustion machine of the present invention sprays fuel from a fuel spray nozzle to a combustion chamber configured in a combustion cylinder, and, on the other hand,
After controlling the airflow sent from the blower fan in proportion to the amount of fuel supplied by the bumper, a part of it is sent from around the fuel spray nozzle to the combustion chamber as primary air, and the remaining air is used as secondary air and tertiary air. , a proportional control type spray combustor in which air is fed into the combustion chamber from between the inner cylinder and the outer cylinder of the combustion cylinder through a secondary air hole and a tertiary air hole provided in the inner cylinder, By combining a rotatable auxiliary cylinder that also has an opening with respect to the inner cylinder, and automatically adjusting the rotational position of the auxiliary cylinder according to the amount of fuel supplied, the degree of opening of the air hole of the inner cylinder can be adjusted to the amount of fuel supplied. It is characterized by being configured to change accordingly.

[0006]

[Operation] The degree of opening of the air holes in the inner cylinder of the combustion cylinder can be freely adjusted by adjusting the degree of overlap with the openings in the auxiliary cylinder. therefore,
By automatically adjusting the auxiliary cylinder to the rotational position that corresponds to the amount of fuel supplied (combustor input), the size and position of the air hole that sends the optimal amount of air according to the amount of fuel supplied can be adjusted between the inner cylinder and the auxiliary cylinder. It can appear with.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram of a proportional control type spray combustor according to the present invention, and FIG. 2 is an explanatory diagram of the operation of air amount adjustment.

The combustion cylinder 10 has a double structure consisting of an inner cylinder 11 and an outer cylinder 12, and a combustion chamber 13 is formed within the inner cylinder 11. Petroleum fuel such as kerosene is supplied from a tank 20 by an electromagnetic pump 21 and sprayed into the combustion chamber 13 from a fuel spray nozzle 22 . Combustion air is supplied into the combustor case 31 by a blower fan 30, and the airflow is first controlled by a bumper 32. A part of the air is then sent into the combustion chamber 13 from around the combustion spray nozzle 22 as combustion primary air A1. The remaining air is sent between the inner cylinder 11 and the outer cylinder 12 as combustion secondary air A2 and combustion tertiary air A3.

A plurality of secondary air holes H2 are provided in the inner cylinder 11 near the nozzle 22, and tertiary air holes H3 are provided in the area farther from the nozzle 22. A rotatable auxiliary cylinder 14 is combined in contact with the outside of the inner cylinder 11. This auxiliary cylinder 14 can be freely rotated to an appropriate rotational position by a motor 40 such as a stepping motor. A plurality of openings H4 are provided in the auxiliary cylinder 14 (see FIG. 2). The opening H4 changes the degree of overlap with the secondary air hole H2 and the tertiary air hole H3 according to the rotational position of the auxiliary cylinder 14. That is, by rotating the auxiliary cylinder 14, the degree of overlapping can be changed from the highest state to the lowest state. As a result, the auxiliary cylinder 1
The degree of opening of the secondary air hole H2 and the tertiary air hole H3 of No. 4 can be changed from the maximum to the minimum, and the amount of air blown into the combustion chamber 13 from each of the secondary air hole H2 and the tertiary air hole H3 can be changed. be able to.

[0010] 50 is an igniter. The device is controlled by a controller 60 with a built-in microcomputer and a remote controller 70.
done by. That is, when the desired combustion intensity is input to the controller 60 by the remote controller 70, the controller 60 controls the electromagnetic pump 21, the blower fan 30, the bumper 32, etc.
, outputs an output signal to the motor 40 corresponding to the combustion intensity. Then, the difference between the target value and the actual value of fuel supply is detected and proportional control of fuel supply is performed. At the same time, feedback is also applied to the blower fan 30, bumper 32, and motor 40.

The rotational position of the auxiliary cylinder 14 and the amount of fuel supplied are in one-to-one correspondence. That is, when the fuel supply amount is maximum, the auxiliary cylinder 14 is set at the rotational position where the air holes H2 and H3 of the inner cylinder 11 and the opening H4 of the auxiliary cylinder 14 overlap at the maximum (the degree of opening of the inner cylinder is maximum). At the same time, when the amount of fuel supplied is minimum, the auxiliary cylinder 14 is set at a rotational position where the overlap is minimum (the opening degree of the inner cylinder is minimum). Even for intermediate fuel supply amounts, the auxiliary cylinder is made to take a rotational position that provides a secondary air amount and a tertiary air amount that are respectively suitable for each fuel supply amount. The correspondence between the fuel supply amount and the rotational position of the auxiliary cylinder can be established by making the output value of the controller 60 to the electromagnetic pump 21 correspond to the output value of the motor 40 in advance.

In FIG. 2, the auxiliary cylinder 1 is connected to the inner cylinder 11.
4 is rotated, the degree to which the opening H4 of the auxiliary cylinder 14 overlaps with the secondary air hole H2 of the inner cylinder 11 and the degree of overlap of the opening H4 of the auxiliary cylinder 14 with respect to the tertiary air hole H3 of the inner cylinder 11 changes. be done. Thereby, the amount of secondary air and the amount of tertiary air can be supplied in accordance with the amount of fuel supplied. Also, multiple holes H
By changing the position, size, etc. of each of the holes 4, the ratio between the amount of secondary air and the amount of tertiary air can also be changed according to the amount of fuel supplied. Similarly, the number and shape of the blow holes can be changed depending on the combustion supply amount.

[0013]

Effects of the Invention According to the proportional control type spray combustion machine according to claim 1, which has the structure and operation as described above in accordance with the present invention, a rotatable auxiliary cylinder having an opening in the same manner as the inner cylinder of the combustion cylinder is provided. By automatically adjusting the rotational position of the auxiliary cylinder according to the amount of fuel supplied, the degree of aperture of the air hole in the inner cylinder can be changed according to the amount of fuel supplied, so one combustion cylinder can handle multiple It is possible to combine different types of air holes, and the amount of secondary and tertiary air can be supplied to the combustion chamber according to the amount of fuel supplied.
The ratio between the secondary air amount and the tertiary air amount can be changed depending on the fuel supply amount, and the number and shape of the air holes can be changed. That is, according to the present invention, good combustion can be achieved with a sufficiently appropriate air supply for a wide range of combustion inputs.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a proportional control type spray combustor according to the present invention.

FIG. 2 is an explanatory diagram of the effect of air amount adjustment.

[Explanation of symbols]

10 Combustion tube 11 Inner cylinder 12 Outer cylinder 13 Combustion chamber 14 Auxiliary tube 22 Fuel spray pump 32 Bumper A1 Primary air A2 Secondary air A3 Tertiary air H2 Secondary air hole H3 Tertiary air hole H4 Opening

Claims (1)

[Claims] Claim 1: Fuel is sprayed from a fuel spray nozzle into a combustion chamber configured in a combustion cylinder, while a bumper controls an airflow sent from a blower fan in proportion to the amount of fuel supplied, and then a part of the airflow is Primary air is sent into the combustion chamber from around the fuel spray nozzle, and the remaining air is sent as secondary air and tertiary air from between the inner cylinder and the outer cylinder of the combustion cylinder to the secondary air hole provided in the inner cylinder. This is a proportionally controlled spray combustion machine in which air is fed into the combustion chamber through a tertiary air hole, and the inner cylinder of the combustion cylinder is combined with a rotatable auxiliary cylinder that also has an opening, and the rotational position of the auxiliary cylinder is adjusted. 1. A proportional control type spray combustion machine, characterized in that the degree of opening of the air holes in the inner cylinder is changed in accordance with the amount of fuel supplied by automatically adjusting the amount of air in accordance with the amount of fuel supplied.