JPS5819035Y2 - belt press - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt press that processes various waste liquids such as sludge, that is, separates liquid and solid contents in the waste liquid.

First, a conventional belt press will be explained based on FIG. 1.

01 is the sludge supply hopper, 02 is the lower filter cloth, 03 is the upper filter cloth, 04 is the filter cloth meandering correction roll, 05 is the stretch roll for adjusting the filter cloth tension, 06 and 07 are the dewatering rolls, and 08 is the roll for dewatering. Cake peeling roll, 09 is a cake scraping device.

What is shown here is a general roll arrangement of a belt press, which is formed of a series of rolls arranged so as to be able to rotate in accordance with the movement of the filter cloth 02.03.

The sludge is sandwiched between two tensioned upper and lower filter cloths 02, 03, and is dehydrated by the compressive force generated when the tensioned filter cloths 02.03 are pressed against the dewatering roll 06.07. , it is dehydrated into a cake while discharging the internal water.

The dehydration syneresis liquid falls by gravity and is discharged outside the machine, but due to the surface tension of water, the dehydration syneresis liquid remains inside the filter cloths 02 and 03, so the filter cloths 02 and 03 are removed from the dewatering roll 06. , 07, the water in the filter cloth 02.03
Since the cake shifts to a more water-absorbing one, the moisture content of the cake does not decrease.

In order to overcome this problem, the number of dewatering rolls 06.07 must be increased, or special roll arrangements must be made, or special rolls must be used, leading to problems such as increased costs and maintenance.

Therefore, the present invention has been made with the object of providing a belt press that has a simple structure and can easily reduce the moisture content of a cake.

Next, the present invention will be explained based on an embodiment shown in FIG.

A water-absorbing roll 20 made of sponge is pressed against the last of the dewatering rolls 16 located below, and a squeezing roll 21 made of steel is pressed against the water-absorbing roll 20.

The water absorbent roll 20 is rotated by force when pressed against the dewatering roll 16, and the crest roll 21 is also rotated by force when pressed against the water absorbent roll 20, and further,
The force with which the water-absorbing roll 20 and the squeezing roll 21 are pressed against the dewatering roll 16 and the water-absorbing roll 20, respectively, can be adjusted.

The rest of the structure is the same as a conventional belt press.

Of the dehydrated syneresis liquid dehydrated at the bent portions of the filter cloths 12 and 13 on the roll curved surface of the dehydration roll 16, the water that did not fall by gravity and remained in the filter cloth 12 due to the surface tension of the water is transferred to the water absorbent roll 2.
The water absorbed by the absorbent roll 20 is squeezed by the squeezing roll 21 and passed to the water absorbent roll 20.
0 is dehydrated and discharged.

Therefore, by providing the water-absorbing roll 20 and the squeezing roll 21, the dehydration syneresis liquid remaining on the filter cloth 12 is effectively removed, preventing the dehydration syneresis liquid from transferring to the cake, increasing the dewatering efficiency, and The number of rollers 16 and 17 can be reduced, and there is no need for special arrangement of rolls for dewatering, and an increase in costly maintenance is also prevented.

Although the present invention has been explained above based on one embodiment, the present invention is not limited only to this embodiment.
As shown in the figure, a water-absorbing roll 20' is pressed against the dewatering roll 17' located above, and a squeezing roll 21' is pressed against the water-absorbing roll 20', and the water squeezed by the squeezing roll 21' is transferred to the filter cloth 13'. Dehydration capacity liquid receiver 22'
It may be provided with a dewatering roll 16.
It can be used even if the diameter of roll 17 decreases toward the downstream side, and the water-absorbing roll 20 may be made of any highly absorbent material, such as felt, instead of sponge. Furthermore, the squeezing roll 21 may be made of any material other than steel, such as rubber-wrapped or synthetic resin, as long as it can squeeze water by applying pressure to the water-absorbing roll 20, and even the belt press itself. , a type of belt press in which the filter cloth runs in any direction other than one in which the filter cloth runs in the lateral direction may be used.

In short, the present invention supplies a stock solution between a pair of running filter cloths, runs the filter cloths around a plurality of dewatering rolls in a zigzag pattern, runs the filter cloths, and then separates the filter cloths. In a belt press that discharges the cake remaining between the filter cloths, an elastic and water-absorbent water absorbing roll is in contact with at least one of the dewatering rolls on the side where the dewatering roll and the filter cloth are wrapped around; Provided is a belt press characterized by arranging a squeezing roll in contact with the water absorption roll,
According to this belt press, by providing a water absorption roll and a squeezing roll, the dehydration syneresis liquid remaining on the filter cloth is effectively removed, preventing the dehydration syneresis liquid from transferring to the cake, increasing the dewatering efficiency, and The number of rolls can be reduced, a special arrangement of rolls for dewatering, etc. is not required, and increased costs and maintenance can be prevented.

Furthermore, in the present invention, by providing a water absorption roll and a squeezing roll on the dewatering roll placed at the latter stage of the entire dewatering process of the belt press, the water content of the processed material that has already been dehydrated to some extent is further reduced. The final dewatering efficiency can be further improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a conventional belt press, FIG. 2 is a diagram showing one embodiment based on the present invention, and FIG. 3 is a diagram showing another embodiment. 01.11...Sludge supply hopper, 02,03.
12.13.12'. 13'...Filter cloth, 04,14...Filter cloth meandering correction roll, 05°15...Filter cloth tension adjustment roll, 06,07,16,17. 16'. 17'... Dewatering roll, 08, 18...
... Cake peeling roll, 09,19 ... Cake scraping device, 20.20' ... Water absorbing roll, 21.21' ... Squeezing roll, 22'・
...Dehydration capacity liquid receiver.

Claims (1)

[Scope of utility model registration request] A stock solution is supplied between a pair of running filter cloths, the filter cloths are passed around a plurality of dewatering rolls in a zigzag pattern, and the filter cloths are run. In a belt press for discharging the cake remaining in the filter, an elastic and water-absorbing water-absorbing roll is in contact with at least one of the dewatering rolls on the side where the dewatering roll and the filter cloth are wrapped, and the water-absorbing roll is in contact with the water-absorbing roll. A belt press characterized in that a squeeze roll is arranged.