JPH09285711A - Demister for steam drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the demister with the members easily carried into a steam drum from a manhole and capable of being assembled in the drum without difficulty. SOLUTION: Each demister unit is formed with split demisters 1a to 1c and 1a' to 1c' obtained by splitting a strip demister having a width smaller than the inner diameter of a manhole in the longitudinal direction. The joints between the outer frames 7a, 7b and 8 formed by arranging the demister units in a line and the demister units and the joints between the demister units are formed by the respective inserting parts 5 and 6a to 6c and the inserted parts 4, 9 and 10a. Consequently, since the width of the demister unit is smaller than the inner diameter of the steam drum, the demister unit is easily carried into the drum, the unit is easily attached to the outer frame without bolt and nut since all the joints are of an insertion system, adjustment is not needed, and the cost is remarkably lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam drum demister device applied to a steam drum of a boiler.

[0002]

2. Description of the Related Art A demister device is a device in which meshes are superposed and steam is passed through the mesh to remove water in the steam.

A conventional steam drum demister device applied to a boiler is arranged in the steam drum 2 as shown in FIG. 5, but the demister having the steam passage hole 14 has a wide width, Since it cannot be inserted from the manhole 3 of the drum 2, the width is divided into two as shown in FIG. 5 and FIG.
The demister 01a with the length divided into the weight that a person can carry
It was installed in the steam drum 2 as 01f.

The demisters 01a to 01f, whose width is divided into two parts and which are also divided in the longitudinal direction, are assembled and mounted after being inserted into the steam drum, but all the divided parts are tightened with bolts and nuts 03. It was Reference numeral 02 is a stopper.

[0005]

The conventional demister device for a steam drum of a boiler has the following problems.

1) Since the manhole of the steam drum into which the demister is inserted is narrow, it is necessary to divide the manhole into two parts in the width direction, and it is also necessary to divide the manhole appropriately in the longitudinal direction to allow manual work in a narrow space. is there.

2) The joining of the divided demisters in the steam drum is performed by using bolts and nuts and tightening them. Therefore, the assembly is difficult and the adjustment takes time.

3) A large number of bolts at the joint of the demister
A large amount of work time is required because nuts are required, and rotation prevention welding is required for each nut.

4) As for the outer frame to which the demister is mounted, there is an error in manufacturing and an error in installation. Therefore, it is necessary to adjust the dimensions of both ends of the demister and the outer frame, and it takes time to adjust. The present invention seeks to solve the above problems.

[0010]

A steam drum demister device according to a first aspect of the present invention is formed by dividing a strip-shaped demister having a width narrower than an inner diameter of a manhole of the steam drum into a plurality of parts in the longitudinal direction. Separate demisters, each of which is formed by a split demister and has insertion portions formed at its one and both ends and an insertion portion formed at the other end, and a plurality of demisters arranged in line and inserted inside An outer frame formed in a rectangular shape by a beam on one end side provided with a portion, a beam on the other end provided with an insertion portion inside thereof, and two longitudinal beams each provided with an insertion portion inside thereof. It is characterized by having.

In the above, in order to attach each demister unit to the outer frame after carrying it into the steam drum, first, insert the insertion portions of one end and both ends of the first demister unit inside the beam on one end side of the outer frame. The first demister unit is attached to the outer frame by inserting the first demister into the inserted part and the inserted part inside the longitudinal beam.

The second and subsequent demisters are installed by inserting the insertion part at one end into the insertion part at the other end of the demister installed before it, and the last demister is installed before it. After inserting the insertion portion at the other end of the single body into the insertion portion at the one end, the insertion portion inside the outer frame is inserted into the insertion portion at the other end to complete the attachment.

In the present invention, since the width of the demister is made smaller than the inner diameter of the steam drum, it is easy to carry the demister alone into the steam drum, and all the joints are inserted so that bolts and nuts are unnecessary. Therefore, it becomes easy to attach the demister alone to the outer frame, no adjustment is required, and it is possible to significantly reduce the cost.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A steam drum demister device according to a first embodiment of the present invention will be described with reference to FIGS.

The present embodiment shown in FIGS. 1 to 3 is a demister device for a steam drum arranged in a steam drum 2 having a manhole 3, in which divided lower demisters 1a, 1 are provided.
b, 1c, divided upper demisters 1a ', 1b', 1c 'and frames 6a, 6b, 6c, respectively, demister units 11a, 11b, 11c and demister units 11a, 11b, 11c arranged in a line. One end side beam 7a, the other end side beam 7b, and two longitudinal beams 8
The outer frame is formed in a rectangular shape.

The demister unit 11a, 11b, 11c
2, as shown in FIG. 2, divided upper demisters 1a, 1b, 1c each having a vapor passage hole 14 and having a width smaller than the inner diameter of the manhole 3 are formed by dividing the upper and lower demisters into three parts. Split lower demisters 1a ', 1b'
, 1c 'are U-shaped frames 6a, 6b, 6c
They are formed by being intermittently attached to the lower surface and the upper surface of each of them.

The above-mentioned one end side beam 7a and the other end side beam 7a,
As shown in FIG. 3 (c), the outer frame formed by 7b and the two longitudinal beams 8 has two supports 4 vertically attached by welding inside the one end side beam 7a.
As shown in (e), one support 5 is attached to the inside of the beam 7b on the other end side by welding, and FIGS.
As shown in FIG. 5, a mounting plate 9 is attached to the inside of the longitudinal beam 8 by welding, and mounting hardware 10a, 10b, 10c, which are spaced apart from each other, are attached to the mounting plate 9 by welding.

In the above, the demisters 11a, 11
The attachment of b and 11c to the outer frame after carrying in the steam drum 2 is performed as follows. First, the demister unit 11a is slid while making contact with the lower surface of the mounting plate 9 of the outer frame, and as shown in FIGS.
Both ends of the frame 6a of "a" are inserted between the mounting plate 9 and the mounting hardware 10a, and further slid to insert the tip of the frame 6a between the two supports 4 as shown in FIG. 3 (c).

Next, the demister unit 11b is mounted.
This is also slid in the same manner as above to insert both ends of the frame 6b between the mounting plate 9 and the mounting hardware 10b, and then further slid to move the tip of the frame 6b to the demister unit as shown in FIG. 3 (d). It is inserted between the divided lower demister 1a and the divided upper demister 1a 'at the other end of 11a.

The last demister unit 11c is attached by sliding the demister unit 11c so that the tip of the frame 6c is at the other end of the demister unit 11b.
After inserting it between b and the divided upper demister 1b ', slide the demister unit 11c slightly in the opposite direction, and install the support 5 between the divided lower demister 1c and the divided upper demister 1c' at the other end of the demister unit 11c. Plug in, then
The mounting hardware 10c is attached to the mounting plate 9 by welding to complete the process.

In the present embodiment, the width of the demister is made smaller than the inner diameter of the manhole of the steam drum so that the demister alone can be carried into the steam drum without dividing the width direction, and all joints are connected. Since the use of bolts and nuts has been completely eliminated as a plug-in method, assembly is easy and no adjustment is required, resulting in a significant cost reduction.

A steam drum demister device according to a second embodiment of the present invention will be described with reference to FIG. The demister device according to the present embodiment shown in FIG. 4 differs from the demister device according to the first embodiment in the following points.

That is, each demister unit 12a, 1
2b and 12c are each formed by a single-stage divided demister, and as shown in FIG. 4 (d), a step corresponding to the plate thickness is provided at the other end of each demister unit 12a and 12b.
As shown in FIG. 4E, two supports 4 are provided inside the beam on the other end side of the outer frame.

Also in this embodiment, the demister unit can be attached to the outer frame as in the first embodiment,
It is easy to carry in and assemble the demister units 12a, 12b, 12c.

[0025]

The steam drum demister device of the present invention comprises:
Each demister unit is formed by a divided demister whose width is narrower than the inner diameter of the manhole and the longitudinal direction of the demister is divided, and each demister unit is arranged in a line and the joint portion of the outer frame and the demister unit, The width of the demister is smaller than the inner diameter of the steam drum because the joints of the individual demisters are formed by the insertion part and the inserted part, respectively. Since the parts are plugged in and no bolts or nuts are needed, it is easy to attach the demister to the outer frame, and no adjustment is required, resulting in a significant cost reduction.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a steam drum including a demister device according to a first embodiment of the present invention.

2A and 2B are explanatory views of a single demister forming the demister device according to the first embodiment, FIG. 2A is a plan view, and FIG. 2B is a view taken along the line AA of FIG.

3A and 3B are explanatory views of the demister device according to the first embodiment, in which FIG. 3A is a side view, FIG.
(C) is an enlarged view of C part of (a), (d) is an enlarged view of D part of (a), (e) is an enlarged view of E part of (a), (f) is of (a). F-F arrow view, (g) is an enlarged view of G part and H part of (f).

4A and 4B are explanatory views of a demister device according to a second embodiment of the present invention, in which FIG. 4A is a side view, FIG. 4B is a view taken along the line I-I of FIG. 4A, and FIG. Enlarged view of part J of (d) is (a)
An enlarged view of the K portion of (a), an enlarged view of the L portion of (a),
(F) is an MM arrow view of (a), (g) is N of (f).
FIG. 3 is an enlarged view of a portion and a portion P.

FIG. 5 is an explanatory diagram of a steam drum incorporating a conventional demister device.

6A and 6B are explanatory views of a conventional demister device, FIG. 6A is a plan view, and FIG. 6B is a view taken along the line Q-Q of FIG.

[Explanation of symbols]

 1a to 1c Split lower demister 1a 'to 1c' Split upper demister 2 Steam drum 3 Manhole 4,5 Support 6a to 6c Frame 7a One end side beam 7b Other end side beam 8 Longitudinal beam 9 Mounting plate 10a to 10c Mounting hardware 11a to 11c Single demister 12a to 12c Single demister 14 Steam passage hole

Claims (1)

[Claims] 1. A strip demister having a width narrower than the inner diameter of a manhole of a steam drum is divided into a plurality of divided demisters in the longitudinal direction, and each of the demisters has an insertion portion formed at one end and both ends thereof. A plurality of demisters each having a plugged portion formed at the other end, and one beam having the plugged portions provided inside the demisters and the other end having the plugged portion inside the beam Side beams and plugged parts inside each side 2
A steam drum demister device comprising an outer frame formed in a rectangular shape by a longitudinal beam of a book.