JP3188766B2 - Method and apparatus for loading or replacing element for air preheater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is elementary for the air preheater
Relates to bets carry or replacement method and apparatus, secure the loading or replacement of the air preheater for elements that can be incorporated in a short period of time, especially the heat exchange element of an air preheater for boiler primary and the secondary stator Methods and equipment
About the installation .

[0002]

2. Description of the Related Art FIG. 3 shows a state in which a boiler body 1 and an air preheater 2 are installed in a boiler supporting steel frame 10. That is, the air preheater 2 is installed on the horizontal support beam 10e (about 13 m above the ground) in the left and right steel frames after the boiler can. As shown in FIG. 4, the rotating portion of the air preheater 2 comprises a primary stator 21 at the center and a secondary stator 22 at the outer periphery thereof. Each of the primary and secondary stators has a large number of cylindrical partitions having different radii. 23 and a radial partition 24 orthogonal to the radial direction and extending radially.

When the air preheater 2 is installed, the installation position is first marked on the horizontal support beam 10e to temporarily remove the minimum supporting steel frame that hinders the installation, and then the secondary stator 22 is cut in half. Since it is carried on the ground in a state, it is lifted half by one using a large crane 3 and both are welded and joined on a temporary mounting base on a support beam at a marking position. At this time, the secondary stator 22 is incorporated in the casing 25, and the support 26 is attached to a position on the outer periphery of the casing 25 which is divided into four equal parts.

[0004] Following the installation of the secondary stator 22, the primary stator 21 to be incorporated therein is lifted by a large crane 3 from the ground half by one half, and integrally joined on a temporary mounting stand, and then incorporated into the secondary stator 22. Next, the rotating spindle is assembled into the center of the lifted primary stator 21. Next, primary and secondary
The fan-shaped space defined by the cylindrical and radial partitions 23 and 24 in the next stator has an outer shape of approximately the same shape and dimensions that fits in the same space 50, and the inside is filled with a honeycomb-shaped corrugated sheet. The element 29 (similar to a car radiator and weighing about 1 ton) is lifted by a large crane 3 on the ground to an installation place on a steel frame, and is vertically spaced about 13 m in height to be installed with a crane operator. The elements 29 are incorporated one by one into the fan-shaped spaces 50 of the primary and secondary stators while repeating a signal with an installation worker at the site. The number of the elements 29 is about 200 in a normal air preheater for a boiler, and the time required for assembling the elements is enormous.

[0005]

In the above prior art, the element is lifted from the ground by a large crane such as a truck crane, and is carried from the boiler steel frame to a place where the air preheater is installed. The crane operator and the installation worker have performed the installation by radio signals while moving while finely moving to a predetermined position that can be incorporated into the fan-shaped space. Therefore, since all operations are signal operations in a narrow place, there are many problems such as danger, collision of the element with other objects during operation, and long time required for alignment.

An object of the present invention is to eliminate the above-mentioned problems of the prior art, and to provide an element for an air preheater which is safe and has a short construction period.
And a method and an apparatus for carrying in or replacing the object .

[0007]

In order to achieve the above object, a first invention of the present application is to provide a flange upper surface (25) in a circumferential direction.
a) having a casing (25);
5) a rotating spindle (28) provided at the center of the
Assembling from the center to the outer periphery of the leasing (25)
Stator (21, 22) and the stator (21, 22)
22) Empty for a plurality of sector-shaped elements by partitioning the inside
Having partitions (23, 24) forming a space (50).
In the space (50) for the element of the air preheater (2)
Loading or replacing element (29),
How to carry in or replace the air preheater element
To the main column (31) connected to the rotary main shaft (28).
At right angles, extending outwardly from the casing (25),
The casing (2) around the main pillar (31).
5) The main beam (32) rotatable along the circumference of (5) has its length
Of the element mounted movably along the
Said element by lifting means (37)
(29) and lift the casing in the radial direction or
Move in the circumferential direction and within the element space (50)
Characterized by being brought into or replaced by
The present invention relates to a method for carrying in or replacing an element for a gas preheater .

In a second aspect of the present invention, the upper surface of the flange extends in the circumferential direction.
(25a), the casing (25), and the casing
A rotating main shaft (28) provided at the center of the shaft (25);
From the center to the outer periphery of the casing (25)
Stator incorporated (21, 22) and said stator
(21, 22) is divided into a plurality of sector-shaped elements
Partitions (23, 24) forming a space (50) for
Space for the element of an air preheater (2) having
The element (29) is loaded into (50) or
Replacement, delivery or replacement of air preheater element
An apparatus, comprising: a main column connected to the rotating main shaft (28).
(31), orthogonal to the main pillar (31), and the casing
(25) and extends outside the main pillar (31).
Rotatable around the circumference of the casing (25) as a center
The main beam (32) provided on the main beam and the main beam (32)
And the upper surface (2) of the flange of the casing (25).
5a) the legs (33) and the main beam (32)
An element mounted movably along its length
Moving device equipped with means for lifting and lowering the element (37)
(35) The element for an air preheater characterized by having
The present invention relates to a device for carrying in or replacing a material.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Loading of an element for an air preheater according to the present invention
Alternatively , FIG. 1 shows a replacement device, and FIG. 2 shows a method of loading or replacing the device. Flange part 2 of main shaft 28 of air preheater 2
The main rotating column 31 is connected on 8a. A main beam 32 that is orthogonal to the main column 31 and extends outward from the casing 25 of the air preheater 2 is attached to the upper portion of the rotary main column 31. A branch beam 40 orthogonal to the main beam 32 is attached to the main beam 32, two legs 33 are provided below both ends of the branch beam 40, and a traveling wheel 34 is provided at a lower end of the leg 33. The wheels 34 travel along the upper flange portion 25a of the casing 25 of the air preheater.

Both ends of the branch beam 40 are reinforced by two reinforcing beams 39 extending from the main beam 32. A floor is provided on the reinforcing beam 39 and the branch beam 40, and a winch 36 for lifting the element is installed. Two pulleys 38 are provided at the tip of the main beam 32, and the pulleys 38 provided on the trolley 35 running on the main beam 32 are provided.
guide the wire 37 extending from the winch 36 with a,
The element can be lifted and hung.

The trolley 35 moves along the radial direction of the primary and secondary stators 21 and 22 of the air preheater on the main beam 32 by means of a wire 41 connecting to the rotating main column 31 to carry the element. Element loading or unloading according to this embodiment
The replacement device is configured as described above, and attaches the element carried on the ground to the tip of the lifting wire 37,
The element assembling operator on the air preheater installation support beam 10e lifts the winch 36 by operating the winch 36, and moves in the radial direction by moving the trolley 35, and moves in the circumferential direction by the legs 3.
This is performed by running on the flange surface 25a of the upper surface of the casing by the wheel 34 provided at the tip of the third, and the elements are sequentially incorporated and filled in all the fan-shaped spaces 50 of the air preheater.

According to this embodiment, as compared with the prior art, there is almost no need for a signaling operation, and minute movement and position adjustment can be performed while directly checking the positional relationship between the space in which the element is incorporated and the element with the eyes. Therefore, the installation work can be performed safely and in a short period of time. INDUSTRIAL APPLICABILITY The present invention can be used for inspection, repair, and replacement of air preheater elements at the time of periodic inspection of a boiler, other than when installing an air preheater.

[0013]

According to the present invention, the element assembly can be easily performed and finely adjusted by using a small-turning element carrying-in or replacing device without using a large crane, thereby minimizing a signal operation. Work can be performed, the safety of the work can be increased, and the construction period can be significantly shortened.

[Brief description of the drawings]

FIG. 1 is a diagram showing an element loading or replacing device according to the present invention.

FIG. 2 is a diagram showing a situation in which an element is carried into primary and secondary stators of an air preheater according to the present invention.

FIG.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Boiler main body, 2 ... Air preheater, 10 ... Boiler support steel frame, 10e ... Horizontal support beam, 21 ... Primary stator, 22 ...
Secondary stator, 23: cylindrical partition, 24: radial partition, 25: casing, 25a: casing upper flange, 26: support, 28: air preheater main shaft, 31: main column, 32: main beam, 33: leg , 34 ... wheels, 35 ... trolley, 36 ... winches, 37 ... lifting wires, 38, 38a
... pulleys, 39 ... reinforcement beams, 40 ... branch beams, 41 ... wires.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F22B 37/24 F22B 37/02 F23L 15/00

Claims (2)

(57) [Claims] 1. A case having a flange upper surface in a circumferential direction.
And a rotating spindle provided at the center of the casing.
From the center to the outer periphery of the casing.
And a plurality of cuts formed by partitioning the inside of the stator.
With a partition that forms a space for the fan-shaped element
The element in the space for the element of the air preheater
Element for air preheater to be carried in or replaced
A method of loading or replacing
Perpendicular to the connected main pillar and extending outward from the casing
And the circumference of the casing around the main pillar.
Can be moved along its length along a main beam that can rotate along
For lifting and lowering elements attached to Noh
Therefore, the element is lifted, and a half of the casing is lifted.
Move in the radial or circumferential direction to remove
It is carried in or replaced
How to carry in or replace the element for the air preheater . 2. A case having a flange upper surface in a circumferential direction.
And a rotating spindle provided at the center of the casing.
From the center to the outer periphery of the casing.
And a plurality of cuts formed by partitioning the inside of the stator.
With a partition that forms a space for the fan-shaped element
The element in the space for the element of the air preheater
Element for air preheater to be carried in or replaced
A loading or replacing device for connecting to the rotating spindle.
The main column continued, and perpendicular to the main column, from the casing
Also extends outward, and the casing
A main beam rotatably provided along the circumference of the
On the upper surface of the flange of the casing
To move the legs along the main beam along its length
The means for lifting and lowering the element attached to
Air preheater, comprising:
Device for loading or replacing elements .