JP3073397B2 - Sootblower warm-up device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warming-up device applied to a long plug-in soot blower for removing dust and dust adhering to a tube of a heat exchanger, such as a boiler of a refuse incineration plant or a power plant.

[0002]

2. Description of the Related Art Conventionally, when a soot blower is stopped, that is, when the soot blower is at a withdrawn position, the steam piping for the soot blower is warmed up. It has not been.

[0003]

As described above, when the conventional soot blower is stopped, the soot blower main valve is not heated because the steam for warming-up is shut off by the soot blower main valve. Therefore, when steam is passed through the soot blower at the time of startup, drain is generated. The generated drain accompanies the steam injected for soot blowing and collides with the tube surface, causing a wall thinning due to a drain attack. SUMMARY OF THE INVENTION It is an object of the present invention to prevent a drain from being generated when a long-removal type soot blower is started.

[0004]

In order to achieve the above-mentioned object, the present inventor has proposed that, at the position where the plug-in type soot blower is pulled out, the injection nozzle hole at the tip of the lance tube is directed vertically downward. A soot blower warm-up device comprising: a connected drain discharge means; a steam supply means connected to at least one of the other injection nozzle holes; and a means for closing all other injection nozzle holes. It is a suggestion.

[0005]

In the present invention, a plurality of injection nozzle holes are provided at the tip of the lance tube, and steam is supplied and generated from steam supply means connected to at least one injection nozzle hole at the extraction position of the plug-in soot blower. The drain is discharged from a drain discharge means connected to the injection nozzle hole facing vertically downward. Thus, even when the soot blower is stopped, the soot blower body is heated and warmed up, so that no drain is generated.

[0006]

FIG. 1 is an overall configuration diagram of a soot blower showing an embodiment of the present invention, and FIG. 2 is a detailed view of a portion II in FIG. In the figure, (1) is a steam source valve for soot blow, (2) is a feed tube, (3) is a sealing device, (4) is a lance tube, (5) is a lance tube (4) an injection nozzle at the tip, (6a) ) And (6b) show a plurality of injection nozzle holes, respectively. (11) Drain discharge connected to the vertically downwardly directed injection nozzle hole (6a) of the plurality of injection nozzle holes (6) at the tip of the lance tube (4) at the pull-out position of the plug-in soot blower as described above. Adapter, (1
2) is a drain trap. (13) a steam trace adapter for heat tracing which is connected to the injection nozzle hole (6b) facing upward at the drawing position, (14)
Is an automatic steam valve for heat tracing. The other injection nozzle holes are not shown, but are all closed.
(15) is a sealing device.

When the soot blower is stopped, the soot blow steam source valve (1) is fully closed, the heat trace steam automatic valve (14) is open, and the heat trace steam is supplied via the heat trace steam supply adapter (13). It flows into the lance tube (4) and the feed tube (2) from the injection nozzle hole (6b) and is heated and warmed. The soot blower body is installed with a downward slope toward the tip, and one of the injection nozzle holes (6a) is installed so as to face vertically downward when the soot blower is stopped. It is discharged from the nozzle hole (6a) and flows down to the drain line. The drain line is equipped with a drain trap (12) or a drain trap and an automatic valve (not shown) that bypasses the drain trap to collect the drain and prevent the drain from staying in the drain pipe. At the time of steam tracing, a metal touch or a sealing means (not shown) is provided between the sealing device (15) and the injection nozzle (5) and the heat tracing steam supply adapter (13) in order to prevent leakage of steam. I have.

When the soot blower is started, the heat trace steam automatic valve (14) is fully closed immediately before the start to shut off the heat trace steam. Thereafter, the lance tube (4) and the spray nozzle (5) at the tip thereof advance through the heat trace steam supply adapter (13). The operation (forward, backward) after the start of the soot blower is a well-known matter and will not be described. Also in the soot blower stop process, the lance tube (4) retreats through the steam supply adapter (13) for heat tracing.

[0009]

According to the present invention, the soot blower body can be heated and warmed even while the soot blower is stopped.
There is no drain, and it is possible to prevent the boiler tube and the like from being damaged by drain attack when blowing soot from the boiler tube and the like.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a soot blower showing one embodiment of the present invention.

FIG. 2 is a detailed view of a part II in FIG. 1;

[Explanation of symbols]

(1) Soot blow steam source valve (2) Feed tube (3) Sealing device (4) Lance tube (5) Injection nozzle (6a,), (6b) Injection nozzle hole (11) Drain discharge adapter (12) Drain trap (13) Heat trace steam supply adapter (14) Heat trace automatic steam valve (15) Sealing device

Claims (1)

(57) [Claims] 1. A drain discharge means connected to a vertically downward injection nozzle hole among a plurality of injection nozzle holes at the tip of a lance tube and at least one of the other injection nozzle holes at a pull-out position of a plug-in soot blower. A soot blower warm-up device comprising: a connected steam supply means; and a means for closing all other injection nozzle holes.