JPS5946720B2 - Dehydration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dewatering device for dewatering an object to be dehydrated by sandwiching it between a pair of running furnace cloths, and more particularly to a device for dewatering the object by applying a variable pressing force to the furnace cloth.

Generally speaking, most dewatering devices using furnace cloth perform dehydration by applying pressing force between the furnace cloths with a press belt or the like, and the dehydration effect is influenced by the pressing force.

As a dewatering apparatus for dewatering P materials such as furnace cloth by applying a variable pressing force, the one described in Japanese Utility Model Publication No. 52-22690 is conventionally known.

However, this dewatering device is designed to apply pulsations to the processed material by bringing a cam piece provided at the end of the F material for thin plates into contact with a contact piece provided on the machine frame side. When a pressing force is applied, the middle of the P material in the width direction is curved, so that efficient dewatering cannot be performed.

Therefore, in the present invention, a pair of swinging levers are positioned above or below a pair of furnace cloths running with objects to be dehydrated held therein, and are supported between the swinging levers. A plurality of suppression rolls are brought into contact with the furnace cloth, one end of both swinging levers is rotatably supported by a height-adjustable pivot mechanism, and a swinging movement mechanism is provided on the free end side of the swinging lever. connection,
The oscillating movement of the oscillating lever by the oscillating movement mechanism causes the suppression roll to move up and down, and the vertical movement of the suppression roll applies a variable pressing force to the furnace cloth, thereby making it possible to effectively dewater. It is characterized by

In addition to being provided alone, this dewatering device can be used as a preliminary dewatering device before applying static dewatering force using a press belt.

The present invention will be described below with reference to the illustrated embodiment. In this embodiment, the present dewatering device A is used as a primary dehydrating device, and the dehydrating device B using a press belt is used as a secondary dehydrating device.

The endless lower door cloth 10 has a dedicated guide roll 11 and an upper door cloth 2.
0, and between the guide roll 13 and the main drum 14, which are shared by the upper cloth 20 and the endless press belt 30. The belt is rotated between the two-party common guide roll 12 and the three-party common guide roll 13 and the main drum 14, and the endless press belt 30 is connected to the dedicated guide roll 3.
1 and the tension roll 32, as well as between the guide roll 13 shared by the three parties and the main drum 14.

These lower cloth 10, lower cloth 20, and press belt 30
When traveling in the direction of the arrow, the three-way shared guide roll 13,
13 are located in order from the bottom, main drum 1
The sludge (material to be dehydrated) is placed along a part of the outer circumference of 4 from the bottom layer, and is supplied onto the lower cloth 10 through the supply chute 15 and then sandwiched between the lower cloths 20. 16, first the guide rolls 13, 13 shared by the three parties.
It has a double dehydration structure in which water is dehydrated in the main dehydrator A in between, and then further dehydrated in the secondary dehydrator B.

The dehydrated solid (cake) 17 is finally separated from the lower cloth 10 by a scraper plate 18.

The tension roll 32 is used to adjust the pressing force of the press belt 30 to the main drum 14 side by a hydraulic cylinder device 33, and is provided on a guide rail 32 provided on one side plate of the machine frame 1 and the outer circumferential open plate 5 on the other side. It is supported at both ends by a sliding block 35 that is slidable along.

The sliding blocks 35 on both sides are each connected to a piston rod 36 of the hydraulic cylinder device 33 by a pin 37, and the hydraulic cylinder device 33 is connected to a cylinder arm 39 that is rotatable around a pin 38 provided upright on the machine frame 1. It is pivotally connected via a pin 40.

41 is a rotation operating lever for the arm 39; 42 is the arm 39;
This is a stopper that normally holds the arm 39 in a horizontal position, and when the arm 39 is horizontal, the reaction force of the hydraulic cylinder device 33 is received by the pin 38.

Further, when the arm 39 is rotated in the direction of the arrow via the rotation operation lever 41, the hydraulic cylinder device 33 is rotated as shown by the chain line.
is inclined, and the tension roll 32 supported by the sliding block 35 moves backward accordingly.

Therefore, the dewatering device A of the present invention has a pair of swingers located below the lower F fabric 10 and on both sides of the P fabric in the width direction, by connecting the brackets 51 erected on both sides of the machine frame 1 via the pivot mechanism 52. A plurality of suppressing rolls 5 are pivotally connected to one end of the movable lever 53 and are in contact with the lower cloth 10 on a shaft 54 passed between the swinging levers 53.
5 is rotatably supported, and this swing lever 53 is made to swing up and down via a swing movement mechanism 56.

The pivot mechanism 52 connects one end of the swing lever 53 to the sleeve 5.
The eccentric shaft 58 is inserted into the sleeve 57, and the eccentric portions 59 at both ends of the eccentric shaft 58 are pivotally supported by the bracket 51.

Therefore, when the eccentric shaft 58 is rotated by the rotation operation lever 60, the height position of the eccentric shaft 58 can be adjusted.
1. Fixing screw 62 screwed into the tip of this fixing arm 61
, and a plurality of fixing screw holes 63 screwed into the bracket 51 into which the fixing screws 62 are screwed, so that the bracket 51 can be fixed at an appropriate height position.

Therefore, the press roll 55 on the pivot mechanism 52 side and the lower door cloth 1
0 can be adjusted depending on the state of the sludge 16.

Further, the swing movement mechanism 56 has an eccentric cam 65 engaged below a guide roll 64 supported on the free end of the swing lever 53, and a rotating shaft 66 to which the eccentric cam 65 is fixed via a sprocket 67. It is designed to be rotated.

It is practical to drive the sprocket 67 by the drive chain of the main drum 14 or other roll.

Since the bracket 68 supporting the rotating shaft 66 is attached to the machine frame 1 via an adjuster bolt 69, the distance between the press roll 55 and the lower cloth 10 can also be adjusted on the free end side of the swing lever 53. Can be done.

In addition, the lower cloth 10, the upper cloth 20, and the endless press belt 3
Each of the rolls 0 is basically supported at both ends by the machine frame 1 or the side plate of the machine frame, but there are also rolls involved in the traveling guidance of the endless press belt 30, a slit guide roll 31, and a tension roller. Only one end of the roll 32 and the two guide rolls 13 shared by the three parties is supported by the machine frame 1 or the one side plate 2 of the machine frame 1, respectively, and the other end is supported by the outer enclosure open plate 3.
is supported by

The outer open plate 3 has its outline set along the running trajectory of the press belt 30, and the liquid receiver located inside the press belt 30 is connected to one side plate of the machine frame 1 through the chute 4. Connected to 2.

Therefore, the open outer plate 3 maintains its integrity with the machine frame 1 with its outer side open;
It is connected to the support plate 6 on the open outer plate side of the main drum 14 via a reinforcing plate 5 for the purpose of increasing the integrity with the main drum 14.

This reinforcing plate 5 is removable, and by removing this reinforcing plate 5 and removing the pin 37 (or 40) of the hydraulic cylinder device 33, the entire periphery of the outer envelope opening plate 3 is opened.

Therefore, the endless press belt 30 can be inserted and removed in the axial direction of the roll, that is, in the direction perpendicular to the paper plane of FIG.

In this dewatering device A having the above configuration, when the rotating shaft 66 is rotated via the sprocket 67, the swinging lever 53 swings due to the action of the eccentric cam 65, and the pressing roll 55
The pressing force relative to 0 fluctuates, and the sludge 16 between the lower furnace cloth 10 and the lower door cloth 20 is primarily dehydrated by this fluctuating pressing force.

Particularly, dewatering using such a dynamic load is effective as primary dewatering for sludge with a relatively high water content.

In other words, sludge with a high water content has high fluidity, so if a large static load is applied, there is a risk that the fluidity will cause the sludge to protrude in the width direction of the furnace cloths 10 and 20.
When a dynamic load is applied between 0 and 20, the sludge that tends to protrude under a large load tries to return to its original state under a small load, making it possible to effectively dewater without causing any extrusion.

In addition, depending on the properties such as the fluidity of the sludge, the above-mentioned pivot mechanism 5
The pressure roll 5 is rotated as described above by rotating the eccentric shaft 58 of 2.
By changing the distance between 5 and the lower furnace cloth 10, it is possible to further prevent the sludge from protruding.

It is preferable that the swing lever 52 has a pivot mechanism 52 on the upstream side of the oven cloth and a free end on the downstream side as in the embodiment, since a larger dynamic load can be obtained on the downstream side in accordance with the progress of dewatering.

The sludge that has been primarily dehydrated by this dewatering device A then reaches a secondary dewatering device B, where it is dehydrated by static pressure from a press belt 30.

As a result of being compressed by the press belt 30, a portion of the liquid that permeates through the furnace cloth falls through the holes 30a of the belt 30, and the solids are finally separated from the lower furnace cloth 10 by the scraper plate 18. .

In the above embodiment, the present dehydrator A and the secondary dehydrator B are used together, so the present dehydrator A is installed below the endless furnace cloth. However, when the present dehydrator A is used alone, etc. It is also possible to provide this above the endless furnace cloth.

Further, the swing movement mechanism of the swing lever may be constructed using a pie break or a cylinder device in addition to the embodiments.

In summary, the dewatering device according to the present invention supports one or more pressure rolls between a pair of swinging levers provided on both sides of the endless oven cloth in the width direction, and provides reciprocating swinging motion to the swinging levers. Since the furnace cloth is dehydrated by applying a variable pressing force in the width direction, the furnace cloth does not curve in the width direction and can be effectively dehydrated. It becomes possible to dehydrate the cloth without causing it to protrude from both sides.

Therefore, it is particularly suitable as a primary dehydration device before a static pressure dehydration device.

Furthermore, by fixing the swinging lever to a sleeve through which the eccentric shaft is inserted, the distance between the suppression roller and the furnace cloth can be set to a distance that corresponds to the properties of the sludge by adjusting the rotation angle position of the eccentric shaft.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of a dewatering device according to the present invention, and FIGS. 2, 3, and 4 are lines nn and I-I in FIG. 1, respectively. , 5 is a sectional view taken along the line ■-■, and FIG. 5 is a view taken along the V arrow in FIG. A: This dehydration device, 10: Shimatofu,
16...Sludge, 20...Shimotofu,
30... Endless press belt, 52...
Pivot mechanism, 53... Swing lever, 55...
・Press roll, 56... Rocking movement mechanism, 57.
... Sleeve, 58 ... Eccentric shaft, 64.
...Guide roll, 65...Eccentric cam.

Claims (1)

[Claims] 1 A pair of swinging levers are positioned above or below a pair of furnace cloths running with objects to be dehydrated held therein, along the running direction of the furnace cloths, and a plurality of suppression rolls supported between the swinging levers. is in contact with the furnace cloth, one end of both swinging levers is rotatably supported by a height-adjustable pivot mechanism, and a swinging movement mechanism is connected to the free end side of the swinging lever. A dewatering device characterized in that a suppression roll is moved up and down by the swinging movement of a swinging lever by a swinging movement mechanism, and the up and down movement of the suppression roll applies a variable pressing force to the furnace cloth to dehydrate it.