JP2670220B2 - Construction method of coal bunker and mill zone of coal-fired boiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a coal-fired boiler applied to a thermal power plant or the like.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of a conventional coal-fired boiler used in a thermal power plant or the like. In the figure, in a conventional coal-fired boiler, a supporting steel frame of a boiler and a supporting steel frame of a coal bunker and a mill are shared, and both supporting steel frames have an integrated structure. The boiler zone is constructed by a modular construction method in which supporting steel frames, scaffolds, equipment, pipes, ducts, trays, etc. are divided into large blocks on the ground and then the blocks that have been sequentially blocked are hoisted and assembled. In the figure, reference numeral 1 is a main pillar of a supporting steel frame, 2 is a stud, and 3 and 4 are beams.

[0003]

As described above, in the conventional coal-fired boiler, the supporting steel frame of the coal bunker and the mill and the supporting steel frame of the boiler have an integral structure,
The boiler zone can be constructed by a modular construction method in which modules that are sequentially blocked are hoisted and assembled at the site, but the coal bunker and mill zones share the boiler support steel frame and the coal bunker and mill support steel frame. It cannot be divided and it is impossible to construct by the modular construction method.

[0004]

The method for constructing a coal bunker and a mill zone for a coal-fired boiler according to the present invention is intended to solve the above-mentioned problems. The supporting steel frame of the coal bunker and the mill zone is separated from the supporting steel frame of the boiler zone. first the coal bunker blow after plurality of blocking the coal bunker and the Miruzon a self-supporting structure by
A little bit higher than the specified level by bringing the rack to the specified place.
Then lift the block in the mill zone into place.
Block of the above coal bunker after being loaded and set in
It is characterized by lowering and joining with the block of the mill zone .

[0005]

Operation: That is, the coal van of the coal-fired boiler according to the present invention
In the construction method of the car and mill zone , the supporting steel frame of the coal bunker and mill zone is supported by the boiler zone .
First the coal into a plurality of separately from the steel and freestanding the coal bunker and the Miruzon after blocking
Bring the bunker block into the designated place and
A little higher than the
The coal bunker
Down the block of the
Adapted to bonding, the coal bunker and Miruzon provided independently supporting steel coal bunker and mill a freestanding separate from the boiler zone, after blocking the ground by dividing the coal bunker and Miruzon It will be possible to construct by the modular construction method in which the blocked modules are sequentially lifted and assembled locally.

[0006]

1 to 3 are explanatory views of a coal-fired boiler according to one embodiment of the present invention. In the figure, the coal-fired boiler according to the present embodiment is used in a thermal power plant or the like, and the boiler zone is a supporting steel frame, scaffolding, equipment, piping,
It will be constructed by a modular construction method in which ducts, trays, etc. are made into large blocks on the ground, and then the blocks that have been sequentially made into blocks are hoisted and assembled. In addition, this coal-fired boiler has a self-supporting structure in which the supporting steel frames of the bunker and the mill are separated from the supporting steel frames of the boiler, and the supporting steel frames of the coal bunker and the mill zone are horizontally and vertically divided into large blocks on the ground. After the construction, it is possible to construct by a module construction method in which the modules that are sequentially blocked are locally lifted and assembled.

That is, in the present coal-fired boiler, as shown in FIG. 1, apart from the main pillar 1, the stud 2, the beam 3, and the beam 4 which form the supporting steel frame of the boiler, the pillar 5 which forms the supporting steel frame of the coal bunker and the mill zone. The beam 6 is provided independently, and the supporting steel frames of the coal bunker and the mill are independently configured, and the plane is divided into two in the plane, and further divided into the bunker zone and the mill zone in the vertical direction. The pillars 5 and the beams 6 are cut in a plane and a vertical direction, respectively, but have a structure connectable to each other.
In addition, in the present coal-fired boiler, the supporting steel frame of the coal bunker and the mill is divided into two in a plane, but in the case of a large plane area or a vertical direction, it may be divided into a larger number of modules. The bunker zone module 7 and the mill zone module 8 can incorporate auxiliary equipment such as a bunker and a mill.

When constructing the present coal-fired boiler, the supporting steel frame, scaffolding, equipment, pipes, ducts, trays, etc. in the boiler zone are divided into large blocks on the ground, and then the blocks are sequentially suspended at the site. It will be built by the modular construction method, which will be fried and assembled. Further, as shown in FIG. 2, the supporting steel frames, scaffolds, equipment, pipes, ducts, trays, etc. of the coal bunker and the mill zone are also divided into large blocks on the ground, and then transported to the construction site by a transporter. Then, as shown in FIG. 3, a lifting frame 9 in which the module 7 in the bunker zone and the module 8 in the mill zone are independently provided temporarily.
Then, the hoisting jack 10 and the like are used to sequentially hoist and assemble. At this time, the module 7 in the bunker zone is lifted a little higher than a predetermined level, the module 8 in the mill zone is carried into a predetermined place and set, and then the module 7 in the bunker zone is jacked down to join the module 8 in the mill zone. To do. Then, after the module 7 in the bunker zone and the module 8 in the mill zone are coupled, the temporarily suspended hoisting frame 9, hoisting jack 10 and the like are removed.

In the conventional coal-fired boiler, the supporting steel frame of the coal bunker and the mill and the supporting steel frame of the boiler are integrated, and the coal bunker and the mill zone are composed of the supporting steel frame of the boiler and the supporting steel frame of the coal bunker and the mill. Since it is shared and cannot be divided, it cannot be constructed by the modular construction method.However, in this coal-fired boiler, the supporting steel frame of the coal bunker and the mill is separated from the supporting steel frame of the boiler, and it is a self-supporting structure. and then, coal bunker and mill the supporting steel frame, scaffold, equipment, piping, after large blocks on the ground by dividing the like ducts, sequential block using such hanging fried Frames 9 and the interconnection fried jacks 10 local It is possible to construct by using the modular construction method that lifts and incorporates the converted module, and it is possible to use coal bunker and mill The by constructing a modular construction by blocking on the ground, construction equipment is the cost can be reduced is miniaturized with the construction steps is reduced. Also, in the conventional coal-fired boiler construction schedule, since the supporting steel for the boiler is built after the supporting steel for the coal bunker and the mill is built, the supporting steel for the coal bunker and the mill is a critical path in the overall installation process. In the present coal-fired boiler, the construction of the coal bunker and the mill zone deviates from the critical path of the whole installation process, so the installation process at the site can be shortened by about 2-3 months and the cost can be reduced.
In addition, by blocking at a site other than the construction site, a local material storage area becomes unnecessary, and the narrowness at the construction site is eliminated.

[0010]

EFFECT OF THE INVENTION Coal van of a coal-fired boiler according to the present invention
The construction method of the car and mill zone is as described above .
Support from coal bunker and mill
It provided independently of the steel frame, the minute the coal bunker and Miruzon
Modules that have been divided into blocks on the ground and then blocked
Since it is possible to construct by a modular construction method in which modules are sequentially lifted and assembled locally , the construction man-hours can be reduced, and the on-site installation process can be shortened, resulting in cost reduction.

[Brief description of the drawings]

FIG. 1A is a plan view of a coal-fired boiler according to one embodiment of the present invention, and FIG. 1B is a plan view.

FIG. 2 (a) is a plan view of a bunker and mill zone module, FIG. 2 (b) is a front view, and FIG. 2 (c) is a loading and construction drawing.

FIG. 3 is an explanatory diagram of a module construction method for the bunker and the mill zone.

FIG. 4 (a) is a plan view of a conventional coal-fired boiler,
FIG. 2B is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pillar of supporting steel frame of boiler 2 Stud of supporting steel frame of boiler 3 Beam of supporting steel frame of boiler 4 Beam of supporting steel frame of boiler 5 Pillar of coal bunker and mill zone 6 Beam of coal bunker and mill zone 7 Module of bunker zone 8 Mill zone Module 9 Lifting frame 10 Jack for lifting

Claims (1)

(57) [Claims] 1. Support iron for coal bunker and mill zone
After separating the bone from the supporting steel frame of the boiler zone into a self-supporting structure and dividing the coal bunker and the mill zone into a plurality of blocks, first , the block of the coal bunker is placed at a predetermined location.
Bring it to a place and hang it a little higher than the prescribed level, then
Bring the blocks in the above mill zone to the designated place and set
After dropping the coal bunker block above
A method for constructing a coal bunker of a coal-fired boiler and a mill zone, which is joined to a block of a mill zone .