JPS599296A - Over-drying preventing apparatus of drum dryer in papermaking machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overdrying device for a drum dryer in a paper machine.

Drum dryers used in papermaking generally consist of a drum (1
1 is heated by supplying steam (3) through a steam supply path (2) into the interior of the drum (1), while a moisture jet (4) for drying is heated over the entire outer circumference of the drum (1). Since it is brought into contact with the drum (1) 1 instead of 0, it is usually
Both ends in the M direction (tangential to the 0χ setting range excluding Il'i, '91
1! I try to let them do it. However, these drums (
1), its axially both ends li f'ils (II
There is less load due to contact with the wet paper (4), so during drying, both ends tf1s (]
) has a higher degree of blackness, and both ends (edges) of the paper become over-dried - there is a problem that the paper cannot be dried evenly. In Figure 1, (5) 1.Threshold condensation occurring in the drum (11).
In order to take out the siphon tube (5), there is a support leg for the siphon tube (5), (7) is attached to the support leg of the siphon tube (5).

In recent years, in order to deal with the above problem, 5:l in tram (1)
Both axial ends of f (11, lining or pay/
Mano Hole (7)
41.1).The insulation material (,) is provided with a V in the entire circumference direction, so that it can be brought inside from the 41.1.
The idea is to prevent over-drying.

However, even with this method,
Due to the expansion and convergence lines caused by -C due to the difference in thermal expansion coefficients between i+19# and -C,
At No. 1, a force was applied between the moon (a) and the drum (1) to create a gap, and a gap was created between the drum 1.
7 items: :? IS (Position 11 becomes high temperature and cannot be dried uniformly. Therefore, the heat insulation plate 1" (α) is placed on the inner side of the heat insulation plate (a) at both ends of the drum (1) (inner wall surface of drum 11). It is also possible to install a presser mechanism that can be pressed with equal force (1-), but this requires high manufacturing precision, especially since it is brought inside through a small manhole (7) and assembled. It is very difficult to assemble the block-formed l'!' mechanism inside the clamping drum (1) in a smooth manner.

The present invention 6' has been made in view of these points, and has the property and flexibility to prevent direct heat transfer on both sides of the elastic mist catcher wire on the inner peripheral surface of both ends of the drum. A heat insulating body is provided to form the entire heat insulating space by using a /- member with a
By providing a supporting device to support the heating body on the inner circumference of the drum (m), the effect of preventing heat transfer to the tram in the heat insulating space is enhanced and over-drying of the paper width edge t?μ is completely prevented. 14) At the same time, the heat insulator can be brought into close contact with the inner surface of the drum using the elastic mist extraction wire without requiring high precision from the support device. Also, when the mist trapping wire C1 () is sufficiently thick, the sheet portion θ (l) can be made bare.

Embodiments of the present invention will now be described with reference to the drawings.

Fig. 2 shows an example of the present invention applied to the drum (1) of No. 11 No. 1 in No. 611, in which support devices i 'J (8
) through... 1 heat 1 tube (9) is installed.

1 piece of insulation ((It has many spaces (!?
Mist trapping wires (i, f) obtained
The mistake I-draw 1,! f III Wire (If)' from both sides / supported by Germany 1 - CHr ri・no 1. ：And the CIIJ was made to form between ′′ fluorocarbon, 1 month bone: Resin such as ni / - 1 ・ Father is [ ]'s clogged / ζ Tsuiya / -
1.(I!/IJE is 150 noso/yuto)] 孭+4+〜／-to part 椙(121 (13) in a ring shape Jt.

7 guns, fjjl support device t, 8) k, i,
An arc-shaped manhole (7)
After carrying it into the drum (11), it is assembled into a ring shape to attach the presser to the inner peripheral surface of the drum (1) with the entire body (9) with the required force.IJ
Song J4) and the support ring (14) Pol)Q
The plate spring 06+ is pressed against the inner surface of the heat insulating body (9) and the rad drum (11) by fixing it through the Gffi.
(+7).

When assembling, use the manhole (7) shown in Figure 1.
The annularly formed sheet part (14 (II) and the insulator (9) consisting of the mist trapping wire (1 (a)) are all carried in and placed on the inner peripheral surface of the drum (11 both ends 1), and then A block support 1- is provided on the inner peripheral surface of the heat insulator (9).
'J 7g Q4) and leaf spring scream θη manhole (7)
The support device (8) will be assembled.

As another example, as shown in Fig. 4, a leaf spring 0.07 is placed under the 71ζ-trinog θ4) for insulation! It may be possible to use a caustic awn. Fig. 5 shows an example in which a heat insulator and a sabot t are integrated.

In this way, the heat insulator (9) is pressed against the inner peripheral surface of the drum (] by the plate spring θ), and the heat insulator (9) itself is also pressed against the mist trapping wire (1) Therefore, even if the heat insulator f! Therefore, as shown in No. 61, the steam (3) trying to attack from the directions A and B is blocked by the sheet 1-rits tJ'u2, and the steam that has passed through the sheet part paulownia 0 that is also insulated. The adiabatic space (11
The drum (1161
11ξ heat 'ff to 11: can be suppressed and overdrying can be completely prevented. In addition, in the above, mist capture fjli
wire (if 1/0 is thick enough, use a notebook wire (1 ka (
1; Reference can also be made unnecessary.

Note that the present invention is not limited to the above-mentioned embodiment 1+, but may also be applied to form an algebraic layer in the adiabatic space.
It is also possible to make the body a multi-layered structure.
In this case, a method other than the one shown in the figure should be adopted.
Even if it is C, E is round, the width of one insulation, and the arrangement I/I.
Of course, various changes may be made to the can, position:+, and various changes may be made within the scope of the invention without departing from the gist of the invention.

According to the soil 3rJΔ (7.1 drying prevention device 1 for a drum dryer in a paper machine of the present invention), the following dull effects and metallic odor can be produced.

(1) By forming the entire heat insulating space inside the heat insulator using the mist trapping wire, heat transfer to the drum is effectively prevented in the area where the heat insulator is placed, and overdrying is prevented. It can cause a person to die.

(11) Mist capture with elasticity 1] By providing the wire metal, the heat insulating body can be uniformly brought into close contact with the inner surface of the drum without requiring high precision from the support device.

(iii) Since high precision is not required for the heat insulator and the support device, it is inexpensive to manufacture and easy to assemble.

[Brief explanation of the drawing]

Fig. 1 V is an explanatory diagram showing an example of the configuration of a general tram and a conventional method, Fig. 2 is a partially enlarged explanatory diagram showing an example of the present invention applied to the drum of Fig. 1, and Fig. 6 is an explanatory diagram of the present invention. FIGS. 4 and 5 are explanatory diagrams showing an embodiment of the pond of the present invention. (1) is a drum, (1) is both fhi parts, (4) is wet paper,
(8) is a support device, (9) is a heat insulator, (10) is a wire for mist capture, (11) is a heat insulating space, (121 (131)
indicates a sheet member. Special 31゛Applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 31 13 10 11 1 Figure 4/5 F4 11J12

Claims (1)

[Claims] 1) A configuration in which both sides of an elastic mist-trapping wire are sandwiched between the inner circumferential surface of the dryer tram's 4q1] and both sides of the dryer tram by the air/Ir+ and -li parts JJ: A drum dryer in a paper machine, characterized in that a heat insulating gold film is provided, and a support device is provided on the inner circumference of the heat insulating body to push and support the heat insulating body onto the inner circumferential surface of the dryer drum. Overdrying prevention device.