JP2000283450A - Combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove odor of an exhaust gas effectively by fixing a discharger to an exhaust opening interconnected with the flue of a housing provided with a burner fan and a hot water heat exchanger disposed in the flue of the exhaust gas from the burner. SOLUTION: A burner fan 3 driven through a burner motor 2, a burner 5 for combusting oil supplied from an oil tank, and a hot water heat exchanger 9 disposed along the flue 21 of exhaust gas from the burner 5 are provided in a housing 1. When the burner 5 is ignited, a combustion gas passes through the flue 21 to reach the hot water heat exchanger 9. A muffler 30 is provided above the hot water heat exchanger 9 and an exhaust opening 35 provided at the upper part of the muffler 30 comprises an opening 36 made in the housing 1 and an exhaust stack 37 fixed removably to the opening 36. A discharger 41 is fixed to the opening 36 made in the housing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a combustion device provided with a hot water heat exchanger such as a water heater.

[0002]

2. Description of the Related Art In general, there is known a combustion apparatus including a burner blower, a burner, and a hot water heat exchanger disposed in a flue of combustion gas from the burner in a housing. In this type, the casing is provided with an exhaust port communicating with the flue, and when unburned exhaust gas is exhausted through this exhaust port when extinguishing or igniting a burner, an odor is generated.

[0003] In order to remove this odor, conventionally, a catalyst such as platinum is attached to the main body wall of the hot water heat exchanger,
When extinguishing or igniting a burner, a brake is applied to an oil supply pump to the burner to forcibly stop the burner.

[0004]

However, when a catalyst is used, there is a problem that the catalyst function does not function effectively until the exhaust gas temperature reaches a catalyst activation temperature (for example, 300 ° C. or higher). Therefore, in general, the temperature of the catalyst is raised by using an electric heater, but there is a problem that extra electric power is consumed. In addition, there is a problem that a large amount of SOx and NOx is generated during continuous combustion at a high catalyst temperature.
When the burner is extinguished or ignited, when the brake is applied to the oil supply pump to the burner to forcibly stop the burner, there is no problem after the stop, but there is a problem that the smell exhausted during that time cannot be removed.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a combustion apparatus capable of efficiently removing the odor of exhaust gas.

[0006]

According to the first aspect of the present invention,
In a combustion device including a burner blower, a burner, and a hot water heat exchanger disposed in a flue of combustion gas from the burner in a housing, a discharge device is attached to an exhaust port communicating with a flue of the housing. Things.

In the present invention, since the discharge device is attached to the exhaust port communicating with the flue of the housing, the odor of the exhaust gas exhausted from the exhaust port can be efficiently removed.

According to a second aspect of the present invention, in the first aspect, the discharge device forms a discharge field by corona discharge between the flat electrode having the insulator and the needle electrode, and the discharge gas of the exhaust gas flowing through the discharge field is formed. The configuration is such that the odor is deodorized by ozone.

According to the present invention, the odor element contained in the exhaust gas is oxidized by the ozone generated by the discharge or directly decomposed in the discharge field.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a housing. A burner blower 3 driven by a burner motor 2, a burner 5 for burning oil supplied from an oil tank (not shown), and a flue 21 of a combustion gas from the burner 5 are provided in the housing 1. The hot water heat exchanger 9 is provided. Reference numeral 11 denotes a control board to which a power transformer 12 is connected.

When the combustion control is started on the control board 11, the oil strainer 13,
Petroleum fuel is supplied to the burner 5 through the electromagnetic valve 14 and the electromagnetic pump 15. Then, the air is mixed with the air from the burner blower 3 by the burner 5.
6 is ignited. Reference numeral 17 denotes a flame detection device;
Indicates an outside air thermistor.

When the burner 5 is ignited, the combustion gas reaches the hot water heat exchanger 9 through the flue 21. In this hot water heat exchanger 9, a flue 21 and a hot water passage 7 extend in the axial direction. Water is supplied to the hot water passage 7 through an inlet pipe 22. The warmed water is supplied to the outside through the outlet pipe 23. The inlet pipe 22 is connected to an external pipe via a connection port 25, and the outlet pipe 23 is connected to an external pipe via a connection port 26.

A muffler 30 is provided above the hot water heat exchanger 9. This muffler 30 is the first baffle 3
1, an opening 32, and a second strip 33 are arranged in series. Arrows indicate the flow of exhaust gas.

An exhaust port 35 is provided above the muffler 30. The exhaust port 35 includes an opening 36 formed in the housing 1 and an exhaust tube 37 detachably attached to the opening 36.

In this embodiment, a discharge device 41 is attached to an opening 36 formed in the housing 1. This discharge device 41 is provided with a cylindrical body 40, and is configured to minimize the ventilation resistance in the cylindrical body 40. As shown in FIG. 2, a flat plate electrode 42 and an insulator 43 attached to the flat plate electrode 42 are provided.
And a needle electrode 44, and a power supply 45 is connected between the flat plate electrode 42 and the needle electrode 44.

In this embodiment, for example, only when the burner 5 is extinguished or ignited, the plate electrode 42 and the needle electrode 44
Voltage is applied in between. Then, corona discharge occurs,
A discharge field 46 is formed between the plate electrode 42 and the needle electrode 44.

In the discharge field 46, corona discharge generates ozone, and the ozone oxidizes the odor element or directly decomposes the odor element in the discharge field 46, resulting in the odor of the exhaust gas flowing therethrough. Is deodorized.

In this embodiment, it is desirable to apply a voltage between the plate electrode 42 and the needle electrode 44 only when the burner 5 is extinguished or ignited. During continuous combustion, odor elements are less likely to be generated.
Is to generate a large amount of NOx.

In this embodiment, unlike the conventional one,
No deodorizing catalyst is used. Therefore, even if the exhaust gas temperature is low, the deodorizing function can be effectively functioned from the beginning. Further, when used during continuous combustion with a high catalyst temperature, there is a problem that oxidation occurs and a large amount of SOx and NOx are generated. However, in this embodiment, since the discharge device 41 is configured to operate, it is used for a long time. What is tolerable is provided.

Further, the discharge device 41 is operated only when the burner 5 is extinguished or ignited.
Can be suppressed.

Further, unlike the conventional one, there is no configuration in which a brake is applied to the oil feed pump to the burner to forcibly stop the burner when the burner is extinguished or ignited. Therefore, irrespective of the operation of the oil supply pump, deodorization can be performed immediately at the time of extinguishing or igniting the burner 5.

Although the present invention has been described based on one embodiment, it is apparent that the present invention is not limited to this.

[0024]

According to the first aspect of the present invention, since the discharge device is attached to the exhaust port communicating with the flue of the casing, the odor of the exhaust gas exhausted from the exhaust port can be efficiently removed.

According to the second aspect of the present invention, the odor element contained in the exhaust gas is oxidized by ozone generated by the discharge or directly decomposed in the discharge field, and the odor of the exhaust gas exhausted from the exhaust port is efficiently removed. Can be removed well.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a combustion device according to the present invention.

FIG. 2 is a configuration diagram illustrating a discharge device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Burner motor 3 Burner blower 5 Burner 7 Hot water passage 9 Hot water heat exchanger 11 Control board 21 Chimney 30 Muffler 35 Exhaust port 36 Opening 37 Exhaust cylinder 41 Discharge device 42 Flat plate electrode 43 Insulator 44 Needle electrode 45 Power supply 46 Discharge Place

Claims (2)

[Claims] In a combustion apparatus having a burner blower, a burner, and a hot water heat exchanger disposed in a flue of combustion gas from the burner in an enclosure, an exhaust port communicating with a flue of the enclosure is provided. A combustion device equipped with a discharge device. 2. The discharge device forms a discharge field by corona discharge between a flat plate electrode having an insulator and a needle electrode,
2. The combustion device according to claim 1, wherein the odor of the exhaust gas flowing through the discharge field is ozone deodorized.