JPH0325204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a sludge press dewatering device for removing water from sludge to form a cake.

(Prior art) Conventionally, sludge dewatering equipment has a method in which cloth is placed on both sides of a plate, many of these are lined up in parallel, and the sludge is poured in from the outside under pressure, water is removed through the cloth, and a cake is formed on the surface of the cloth and released. There is an intermittent filtration device that performs washing, but the four steps of dehydration, cake formation, discharge, and washing are performed in sequence before entering a new process, which results in poor work efficiency and the equipment being complicated and expensive. There is a point.

In addition, an endless cloth is wrapped around a part of the drum, the cloth absorbs the sludge, and the moisture of the sludge is sucked into the drum to form a cake on the cloth.
A cloth-traveling type continuous filtration device that performs cake discharge and cloth washing sequentially, and a cloth-traveling type continuous filtration device that transfers the sludge between two endless cloths, sucks water from the sludge, and forms a cake on the cloth. A cloth running type continuous filtration device is also known, which discharges water and washes the cloth one after another, but this tends to cause wrinkles in the center of the endless cloth, resulting in insufficient dehydration.
The problem was that a complicated mechanism was required to prevent endless fabric meandering, making the entire device large and expensive.

Also, as previously shown in Japanese Utility Model Application Publication No. 50-98788,
A rotating drum that has at least three net portions on its circumferential surface and is driven to rotate intermittently; a sample supply cylinder that slides up and down above the rotating drum body and has a gasket at its lower end; and a rotating drum. a mechanism for feeding paper onto the net on the drum surface, located on the left and right sides of the drum; A urine analysis device consisting of a suction means is well known, but it is a device that wraps paper around an arcuate surface from the outside and removes impurities from urine by vacuum suction. This is a device that cannot be applied at all.

(Purpose) The present invention is capable of sequentially and continuously dewatering, forming a cake, discharging, and washing sludge by pressing sludge with a low water content without using endless cloth, and the entire device is small and has a simple mechanism. The purpose is to provide a simple sludge press dewatering device at low cost.

(Example) An example of the configuration of the present invention shown in the accompanying drawings will be described. The rotating shaft 2 of the hexagonal rotating body 1 is pivotally supported by bearings 4 and 5 fixed to the frame 3, and the pulley 6 fixed to the end and the drive shaft 8 of the motor 7 fixed to the frame 3 are connected by a belt 9. It's linked. On the outer surface of the hexagonal rotating body 1, a planar water-passing filter 10 made of punched metal with a large number of holes and cloth superimposed on it is fixed to the outer surface of the hexagonal rotary body 1, and a cover 11 is fixed on the other outer surface, and the filter 10 is fixed to the outer surface of the hexagonal rotary body 1. Partition plates are provided radially between both ends of the water filter. A cam 12 is fixed to the other end of the rotating shaft 2, and is adapted to operate a position detection switch 13. 14
is a square box-shaped sludge box with an open bottom. A hydraulic cylinder 1 is disposed above the hexagonal rotating body 1 and fixed to the frame 3 on its upper surface.
A sludge supply valve 18 connected to the lower end of the piston rod 16 of No. 5 and communicating with the sludge tank 17.
is installed. 19 is hydraulic cylinder 1
5 is a hydraulic control device, 20 is a scraper for scraping off cakes, 21 is a flat water filter washing device, 22 is a pump for pumping sludge into the sludge tank 17, and 23 is an air supply valve into the sludge box 14.

Water falling from each planar water passing filter 10 flows to one side around the outer periphery of the rotating shaft and is discharged to the outside through a hole bored in the cover 11.

Next, the effect will be explained. When the hexagonal rotating body 1 is rotated by the rotation of the motor 7 and the planar water filter 10 comes to the upper horizontal position as shown in FIG.
The cam 12 operates the position detection switch 13 to stop the rotation of the motor 7. Next, the hydraulic control device 1
9 operates the hydraulic cylinder 15 to lower the piston rod 16 and lower the sludge box 1.
4 is brought into contact with the planar water passing filter 10 which is stopped at the upper horizontal position. Next, the sludge supply valve 18 is opened and the sludge tank 17 is opened.
Then, a certain amount of sludge 25 is supplied and closed. Next, the air supply valve 23 is opened to supply air into the sludge box 14.
Adjust the internal pressure to about 2 to 7 kg/cm ² . The moisture in the sludge 25 in the sludge box 14 falls into the hexagonal rotating body 1 through the planar water filter 10, and a sludge cake 26 is formed on the planar water filter 10. Then the hydraulic cylinder 15
5, the piston rod 16 is raised and the sludge box 14 is raised as shown in FIG. Next, the hexagonal rotating body 1 stops rotating 120 degrees in the direction of the arrow due to the rotation of the motor 7, and the planar water filter 1
The cake 25 above 0 falls due to its own weight. If the cake 25 is attached to the planar water filter 10, scrape it off with the scraper 20. At this time,
A sludge box 14 descends into contact with the next planar water passing filter 10, which is stopped at the upper horizontal position, by the same means as described above, dewatering is performed, and a second cake is produced. Next, the hexagonal rotating body 1 stops rotating by 120 degrees due to the rotation of the motor 7. The planar water passing filter 10 with the cake 25 scraped off from its upper surface is stopped at the lower right corner, as shown in FIG. 6, and is washed by a washing device 21. At this time, the sludge box 14 descends into contact with the next planar water passing filter 10, which is stopped at the upper horizontal position, by the same means as described above, dewatering is performed, and a third cake is produced, and at the same time, the sludge box 14 is brought into contact with the next planar water passing filter 10, which is stopped at the upper horizontal position. The second cake is scraped off at the position shown in Figure 5.

In this way, the hexagonal rotating body 1 is rotated intermittently by 120 degrees, and each time a cake is generated at the upper horizontal position, at the same time the cake is scraped off by the scraper at the left position, and at the same time, a flat passage is generated at the right position. The cleaning action of the water filter takes place.

These three actions are performed simultaneously during stoppage. Note that other polygonal rotating bodies may be used instead of the hexagonal rotating body, and planar water-passing filters made of polymerized cloth may be provided on each surface of the polygonal rotating body. Further, when the cake that is dehydrated by pressing the surface of the sludge supplied in the sludge box with air falls under its own weight, a scraper is not necessary.

(Effects) According to the present invention, a plurality of planar water passing filters are fixed at predetermined positions on the outer surface of a polygonal rotating body, and the polygonal rotating body is intermittently rotated so that each planar water passing filter stops at an upper horizontal position. While the machine is stopped, the cake is generated in the upper part, the cake is discharged in the next position, and the flat water filter is washed in the next position at the same time, which improves work efficiency.
Since no endless cloth is used, there is no need for a meandering prevention mechanism, and the overall structure is simple, compact, and inexpensive to manufacture.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a front view of Figure 1, Figure 3 is a right side view of Figure 2, and Figure 4 is a right side view of Figure 2.
6 through 6 are side views sequentially explaining the operation. 1... Hexagonal rotating body, 2... Rotating shaft, 7... Motor, 10... Planar water filter, 14...
Sludge box, 15...Hydraulic cylinder, 1
6...Piston rod, 18...Sludge supply valve, 19...Hydraulic control device, 20...Scraper, 21...Washing device, 23...Air supply valve.

Claims (1)

[Claims] 1 A plurality of planar water passing filters are fixed at predetermined positions on the outer surface of a polygonal rotating body, each of the planar water passing filters has an intermittent rotation mechanism that stops at an upper horizontal position, is equipped with a sludge supply port, and has an open bottom surface. A sludge box is disposed above the planar water passing filter in an upper horizontal position, and has a vertical movement mechanism for the sludge box that is linked with the intermittent rotation mechanism, so that the moisture in the sludge stored in the sludge box flows out into the polygonal rotating body. A sludge pressing dewatering device having a pressing means for cleaning a sludge and a flat water filter cleaning means.