JPS6321995Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sludge guide device that prevents sludge from protruding from a cloth in the initial stage of the dewatering zone of a belt press type dehydrator, that is, the gravity dewatering zone.

Conventionally, the sludge guide device in the gravity dewatering zone of a belt press type dehydrator generally has a structure as shown in FIG. An elastic plate 9, such as rubber, attached to a side plate 10 supported substantially perpendicularly to the side plate 9 is bent inward to form a structure that seals leakage of sludge. Therefore, the effective area of the cloth 4 in the gravity dewatering zone corresponds to the dimension D inside the sealing part of the elastic plate 9, and the effective dewatering area is inside the distance between the side plates 10 on both sides of the belt. It becomes narrower on both sides by the amount that the water is rolled up, and dehydration is not carried out effectively. Furthermore, sludge leakage may occur due to the amount of sludge exceeding a predetermined amount or due to some other cause. As described above, once sludge leaks from the conventional seal, the sludge flows to the edge of the width of the cloth, and eventually leaks from the edge of the cloth.

The present invention was developed in view of the above points.The distance between the side plates that prevents sludge from protruding from the cloth in the gravity dewatering zone of a belt press type dehydrator is the same as before, but the effective area for dewatering is It is an object of the present invention to provide a sludge guide device that increases the flow rate and is reliably sealed.

In order to achieve the above object, the present invention rotates a pair of upper and lower endless cloths by wrapping them around a roll,
A sludge guide device in which side plates substantially perpendicular to the belt traveling direction are arranged at both widthwise edge portions of the cloth at the initial stage of the dewatering zone of a belt press type dehydrator that dewaters between the cloths while transferring the stock solution,
An inverted Y-shaped branch plate is provided that faces outward and downward from the outer surface of the lower part of the side plate of the sludge guide device, and an elastic plate that comes into contact with cloth is provided at the lower part of the side plate, and the lower part of the branch plate The present invention relates to a sludge guide device for a belt press type dehydrator, characterized in that an elastic plate whose lower part contacts the cloth is disposed.
By having this configuration, the device of the present invention prevents sludge from protruding from the elastic plate provided at the lower part of the side plate and the seal portion that contacts the cloth. The present invention provides a sludge guide device for a belt press type dehydrator, characterized in that a retaining section is formed between the sealing section and the plate to prevent sludge from flowing out.

The present invention will be described below with reference to embodiments shown in the figures except for FIG. FIG. 1 shows a belt press type dehydrator to which the sludge guide device of the present invention is applied, in which an upper frame 1 is provided with an upper cloth 3 equipped with an upper cloth tensioning device 5 and wrapped around a roll 14, and a lower frame 2 is similarly provided with a lower cloth 4 wrapped around a roll 15. In this belt press type dehydrator, the lower cloth 4 has a gravity dewatering zone A where the lower cloth 4 is supported by the dewatering roll 6 without cooperating with the upper cloth 3, and the lower cloth 4 where the upper cloth 3 is supported by the dewatering roll 6. It has a wedge dehydration zone B that faces each other and acts in cooperation with each other, and a press zone C in which both fabrics 3 and 4 are overlapped and passed between press rolls 7 in a compressed state. Sludge is supplied to the gravity dewatering zone A by a sludge stock solution supply device (not shown).

A side plate 10 is provided in this gravity dewatering zone A to prevent sludge from accumulating at a certain height and protruding from the lower cloth 4 while reaching the wedge dewatering zone B. The interval E between the side plates 10 is determined so that the dehydrated cake 8 formed by pressurization in the process after dehydration is evenly spread laterally,
When the width of the cloths 3 and 4 is 2100 mm, it is optimal to set the distance E between the side plates 10 to about 1800 mm. As shown in FIG. 3, a branch plate 12 extending outward from the outer surface to form an inverted Y shape is fixed to a portion of the side plate 10 facing the lower cloth 4, and the branch plate 12 and the side plate 10 Elastic plates such as rubber are attached as a seal elastic plate 9 and an outer elastic plate 11 so as to contact the lower cloth 4, respectively. A retention portion 13 is formed by these side plates 10, branch plates 12, seal elastic plates 9, and outer elastic plates 11. This retention portion 13 is arranged within the width of the lower cloth 4 so as to increase its effective area.

In the above configuration, when the undiluted solution of sludge is supplied to the gravity dewatering zone A on the lower cloth 4, the side plate 1
0, and is gradually squeezed and dehydrated by the dewatering roll 6 between the lower cloth 4 and the upper cloth 3 in the wedge dehydration zone B,
In the press zone C, the cake is compressed by the upper cloth 3 and the lower cloth 4, and is discharged as a dehydrated cake 8 from the cake outlet.

In the gravity dewatering zone A, the seal elastic plate 9 is attached slightly in contact with the cloth 4 or bent slightly outward, so that the elastic seal plate 9 is expanded between the both side plates 10 on the lower cloth 4. Depending on the weight of the sludge, the lower cloth 4 exhibits a concave surface, and as a result, the sealing elastic plate 9 alone is insufficient to seal the sludge;
A small amount leaks to the outside. This leaked sludge gradually accumulates between the outer elastic plate 11 and the seal elastic plate 9, and as a result, the sealing effect of the accumulated sludge prevents the supplied sludge from leaking to the outside. It will prevent it. Since the portion of the lower cloth 4 that is in contact with the outer elastic plate forming the retention section is an area that is not affected by the pressing force due to the weight of the supplied sludge,
The outer elastic plate ensures a tight seal with the cloth,
Leakage of sludge that has entered the retention section can be contained within the section. In this case, the effective width of the sludge guide device becomes E, and the effective area can be increased while maintaining the same distance between the side plates 10 as in the conventional device.

In the above embodiment, the outer elastic plate 11 is bent outward with respect to the lower fabric 4, but the outer elastic plate 11 may be bent inward to form the retention portion 13 as shown in FIG. In this way, the spacing between the side plates 10 can be further increased.

As described above, according to the present invention, a branch plate is provided on the side plate provided in the gravity dehydration zone of a belt press type dehydrator so as to extend outward from the outer surface of the side plate so as to form an inverted Y shape. Since the side plates and branch plates are provided with elastic plates that come into contact with the lower cloth to form a retention area, the interval between the side plates can be increased, the effective area becomes larger, and the dewatering performance can be improved. In addition, in the gravity dewatering zone where the sludge stock solution has just been supplied, the sludge leaked from the inner seal elastic plate is also deposited in the retention area, and the sludge is used as a sealing material, and the plastic seal structure formed by this and the seal elastic plate is used to remove the sludge. The present invention as a whole has an excellent effect of preventing sludge from leaking.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a belt press type dehydrator equipped with a sludge guide device, Fig. 2 is a partial sectional view of a conventional sludge guide device, and Fig. 3 is a schematic side view of a belt press type dehydrator equipped with a sludge guide device. FIG. 4 is a partial cross-sectional view of another embodiment of the present invention. 3... Upper cloth, 4... Lower cloth, 9... Seal elastic plate, 10... Side plate, 11... Outer elastic plate, 12
... Branch plate, 13 ... Retention section, 14, 15 ... Roll, A ... Gravity dewatering zone, B ... Wedge dewatering zone, C ... Press zone.

Claims (1)

[Scope of utility model registration request] In a belt press type dehydrator, a pair of upper and lower endless cloths are wound around a roll and driven to rotate, and dehydration is carried out between the cloths while transferring the raw solution.A belt is placed on both edges of the cloth in the width direction at the beginning of the dewatering zone. In a sludge guide device having a side plate that is substantially perpendicular in the direction of travel, an inverted Y-shaped branch plate is provided that faces outward and downward from the outer surface of the lower part of the side plate of the sludge guide device, and a cloth is attached to the bottom of the side plate. 1. A sludge guide device for a belt press type dehydrator, characterized in that an elastic plate is disposed in contact with the cloth, and an elastic plate is disposed at the lower part of the branch plate, the lower part of which touches the cloth.