JPH06174211A - Method and device for cleaning burner gun - Google Patents

Abstract

(57) [Summary] [Purpose] To completely remove the residual oil in the burner gun after extinguishing the burner. [Structure] A cleaning liquid system 10 provided separately from the purge vapor system 3 is extended from a cleaning liquid tank 11 to provide a fuel oil system 2
Connected immediately downstream of the fuel oil valve 4. The cleaning solution system 10 is provided with cleaning solution pumps and valves 12 and 13.
When the burner is extinguished, the residual oil in the burner gun 1 is purged by steam by operating the fuel oil valve 4, the purge steam valve 5, and the cleaning liquid valve 13, and then the supply of steam is stopped and the cleaning liquid is injected. Try steam purge again. Instead of the cleaning liquid stored in the tank 11 as the cleaning liquid, it is possible to use light oil from the boiler.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a method and apparatus for cleaning burner guns, and more particularly burner guns having a purge steam system connected to a fuel oil system.

[0002]

2. Description of the Related Art As shown in FIG. 4, in a burner gun 1 provided in a combustion apparatus or the like, its fuel oil system 2 is usually used.
Is connected to the purge steam system 3. When the burner is operating, the fuel oil valve 4 is opened and the fuel oil is supplied to the burner gun 1. At this time, the purge steam valve 5 is closed.

When the burner is extinguished, the fuel oil valve 4 is closed to stop the supply of fuel oil, while the purge steam valve 5 is opened to supply the purge steam. This allows
Purge steam passes through the pipes of the fuel oil system 2 and the burner gun 1, and the oil remaining therein is discharged into the furnace to clean the fuel oil pipes and the burner gun. .

[0004]

As described above, in the conventional burner gun, the cleaning effect inside the pipe of the fuel oil system and the inside of the burner gun, which is performed after the burner is extinguished, is considered to be due to the purge steam, so that the cleaning effect is poor. Therefore, the residual oil or oil film in them is not completely removed, but some remains. Then, particularly when the atmospheric temperature of the burner gun is high (300 to 350 ° C.), the volatile components of the residual oil in the burner gun disappear, the residual oil loses its viscosity and becomes a carbonized state, and adheres to its inner wall surface. This carbonized residual oil sometimes causes flaking, and when it is large, it often causes the tip of the burner gun tip to be blocked, resulting in poor combustion.

The present invention has been made to solve the above problems of the prior art, and provides a burner gun cleaning method and apparatus capable of completely removing residual oil in the burner gun after extinguishing the burner. With the goal.

[0006]

To solve the above problems, the present invention provides a method for cleaning a burner gun, comprising:
After purging the residual oil with steam, the supply of steam is once stopped, the cleaning liquid is added, and then steam purging is performed again.

Further, according to the present invention, as a burner gun cleaning device for carrying out this method, a cleaning liquid provided separately from the purge steam system in a device for cleaning a burner gun in which a purge steam system is connected to a fuel oil system is used. A system extending from the cleaning liquid tank, connected immediately downstream of the fuel oil valve of the fuel oil system, and a cleaning liquid pump for supplying the cleaning liquid from the cleaning liquid tank to the intermediate part of the cleaning liquid system, and the cleaning liquid delivered by this pump. A burner gun cleaning device is provided with a cleaning liquid valve for turning on and off.

Furthermore, according to the present invention, in a device for cleaning a burner gun in which a purge steam system is connected to a fuel oil system, a cleaning liquid system provided separately from the purge steam system is branched from a light oil system to Provided is a burner gun cleaning device characterized in that the cleaning oil valve is provided immediately downstream of a fuel oil valve of a fuel oil system, and a cleaning liquid valve for supplying and shutting off light oil used as a cleaning liquid is provided in an intermediate part of the cleaning liquid system. .

[0009]

According to the above means, the fuel vapor in the pipe of the fuel oil system and in the burner gun is discharged into the furnace and burned by the first steam purge performed after extinguishing the burner, and in the fuel oil pipe and in the burner gun. Will leave an oil film. Next, by stopping the steam purge and introducing the cleaning liquid, the residual oil of the oil film adhering in the fuel oil pipe and the burner gun is dissolved and separated. Then, by performing steam purging again thereafter, the introduced cleaning liquid and dissolution,
The separated residual oil is completely removed from the fuel oil pipe and the burner gun, and is discharged into the furnace and burned.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention,
The same parts as those shown in FIG. 4 are designated by the same reference numerals, and the duplicated description will be omitted.

In FIG. 1, a burner gun 1 is connected to a fuel oil system 2 and a spraying steam system 6, and a spraying steam valve 7 is opened to spray fuel oil into the furnace. Steam is supplied to the burner gun 1.

Then, the cleaning liquid system 10 according to the present embodiment.
Is provided separately from the purge steam system 3, extends from the cleaning liquid tank 11, and is connected to the fuel oil system 2 immediately downstream of the fuel oil valve 4. Further, in the middle of the cleaning liquid system 10, a cleaning liquid pump 12 for supplying the cleaning liquid from the cleaning liquid tank 11 and a cleaning liquid valve 13 for supplying and blocking the cleaning liquid supplied by the pump 12 are provided. The cleaning liquid should be one that can dissolve and decompose fuel oil, does not contain heavy components that cause carbonization, and can be easily removed by purge steam, and various chemical cleaning liquids, surfactants, etc. can be used. It is possible and is not particularly limited.

Next, the operation will be described. During operation of the burner, the fuel oil valve 2 and the atomizing steam valve 7 are opened, and the fuel oil is thrown into the furnace from the burner gun 1 together with the atomizing steam and burned. At this time, the purge vapor valve 5 and the cleaning liquid valve 13 are closed.

When the burner is extinguished, the valve operation as shown in FIG. 2 is automatically or manually performed to clean the burner gun.

That is, first, the fuel oil valve 4 is closed and the purge steam valve 5 is opened, whereby the fuel oil in the pipe of the fuel oil system 2 and the burner gun 1 is discharged into the furnace. When burned, the oil film remains in the fuel oil pipe and the burner gun. Further, the spraying steam valve 7 is closed after a certain time has passed since the purge steam valve 3 was opened.

After the steam purging is performed for a certain period of time, the purge steam valve 5 is closed, the cleaning liquid valve 13 is opened, and the cleaning liquid pump 12 is started. This allows
The steam purge is stopped, a certain amount of cleaning liquid is added,
The residual oil of the oil film adhering to the inside of the pipe of the fuel oil system 2 and the inside of the burner gun 1 is dissolved and separated. Further, the spraying steam valve 7 is also opened together with the cleaning liquid valve 13.

After the cleaning liquid is supplied for a certain period of time, the cleaning liquid valve 13 is closed, the purge vapor valve 5 is opened again, and the operation of the cleaning liquid pump 12 is stopped. As a result, the introduced cleaning liquid and the residual oil that has been dissolved and separated are completely removed from the pipe of the fuel oil system 2 and the burner gun 1, and are discharged into the furnace and burned. Further, the spraying steam valve 7 is also closed together with the cleaning liquid valve 13.

After the steam purging is performed for a certain period of time and the cleaning is completed, the purge steam valve 5 is closed.
Further, the spraying steam valve 7 is opened a certain time before the purge steam valve 5 is closed, and then is closed a certain time after the purge steam valve 5 is closed.

Next, FIG. 3 shows a second embodiment of the present invention.
The same parts as those shown in FIG. 1 are designated by the same reference numerals, and overlapping description will be omitted. In the present embodiment, light oil is often used as the fuel for starting the boiler, and in view of the numerous advantages such as handling, combustibility, low price, easy retrofitting to the existing boiler, and safety, the burner gun is used. The boiler light oil is used as the cleaning liquid.

That is, according to this embodiment, as shown in FIG. 3, the cleaning liquid system 10 provided separately from the purge steam system 3 is branched from the light oil system 14 of the boiler, and the fuel oil of the fuel oil system 2 is branched. A cleaning liquid valve 13 that is connected to the downstream side of the valve 4 and that supplies and shuts off light oil used as a cleaning liquid is provided at an intermediate portion of the cleaning liquid system 10. Then, the valve operation is performed in the same procedure as shown in FIG.

[0021]

As described above, according to the present invention, in the method and apparatus for cleaning a burner gun, after the residual oil purge by steam, the supply of steam is once stopped and the cleaning liquid is introduced, and then the steam purge is carried out again. By doing so, it is possible to dissolve and separate residual oil and oil film that could not be completely removed by conventional cleaning with only purge steam, and as a result, the tip of the burner gun tip is not clogged and dirty, resulting in poor combustion. It is possible to prevent problems such as these.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of a burner gun cleaning method and apparatus according to the present invention.

FIG. 2 is a diagram showing a procedure of valve operation in the burner gun cleaning apparatus of FIG.

FIG. 3 is a system diagram showing another example of the burner gun cleaning device according to the present invention.

FIG. 4 is a system diagram showing a conventional burner gun cleaning method and apparatus.

[Explanation of symbols]

 1 Burner gun 2 Fuel oil system 3 Purge steam system 4 Fuel oil valve 5 Purge steam valve 6 Steam system for spraying 7 Steam valve for spraying 10 Cleaning solution system 11 Cleaning solution tank 12 Cleaning solution pump 13 Cleaning solution valve 14 Light oil system

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Oka Yutaka Oka 9 Towada, Kamisu-cho, Kashima-gun, Ibaraki Towa Electric Power Co., Inc. Kashima Thermal Power Station (72) Inventor Yukiko Yamaguchi 1-1, Atsunoura-machi, Nagasaki, Nagasaki No. Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Hitoshi Uehara 1-1, Atsunoura-machi, Nagasaki, Nagasaki Prefecture Mitsubishi Heavy Industries Ltd. Nagasaki Shipyard (72) Inventor Masahiko Taniguchi 1-1, Atsunoura-machi, Nagasaki City, Nagasaki Prefecture No. Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard

Claims (3)

[Claims] 1. A method for cleaning a burner gun, comprising: after purging the residual oil with steam, once stopping the supply of steam, introducing a cleaning liquid, and then performing steam purging again. 2. A device for cleaning a burner gun, in which a purge steam system is connected to a fuel oil system, wherein a cleaning liquid system provided separately from the purge steam system is extended from a cleaning liquid tank to provide a fuel oil valve for the fuel oil system. And a cleaning liquid pump for supplying the cleaning liquid from the cleaning liquid tank and a cleaning liquid valve for supplying and shutting off the cleaning liquid supplied by the pump are provided in the middle part of the cleaning liquid system. Burner gun cleaning device. 3. A device for cleaning a burner gun in which a purge steam system is connected to a fuel oil system, wherein a cleaning liquid system provided separately from the purge steam system is branched from a light oil system, and fuel oil of the fuel oil system is branched. Connected just downstream of the valve,
A burner gun cleaning device characterized in that a cleaning liquid valve for supplying and shutting off light oil used as a cleaning liquid is provided in the middle of the cleaning liquid system.