JPS5937352Y2 - Air pressurized sludge dehydration equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air pressurized sludge dehydration device.

For example, sludge that has been chemically treated usually requires a dehydration step for the reasons described below.

A: When sludge is dehydrated, its volume (co-weight) is reduced to about 1/2, which significantly changes transportation costs, which account for a large proportion of processing costs.

B. In landfills, soil is loaded onto the top of the sludge layer and consolidated and dewatered to obtain soil bearing capacity, but by dewatering the sludge, the time it takes to obtain the specified soil bearing capacity can be significantly shortened.

C. With sludge that is not dehydrated, the water area near the dumping site becomes seriously polluted due to the dumping operation, and the wastewater treatment equipment for discharging this polluted water outside the landfill becomes oversized.

This invention is a method to dehydrate sludge by creating a dehydration base in an optimal location. At that time, the dehydration can be performed mechanically, and the dehydrated sludge can be removed quickly and easily using an air pressurized sludge dehydration device. This is what we propose.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is a floating barge, on which a plurality of air pressurized sludge dewatering devices 2 of the present invention are installed.

Note that instead of the floating barge 1, a fixed platform on the ocean or a shore may be used.

Next, the air pressurized sludge dewatering device 2 will be explained.

Reference numeral 3 denotes a frame-like machine frame, on which a pair of front and rear horizontal shafts 4 are supported via bearings 5.

A dehydration tank 6 is attached between the inner ends of these horizontal shafts 4, and the dehydration tank 6 is rotatable around a horizontal shaft center 7.

The dehydration tank 6 has a rectangular box shape with an open top, and a filter cloth 8 is attached to the bottom inner surface of the tank through an expanded metal to form a dehydration space 9 below the filter cloth 8. It is opened by a drain port (not shown).

Reference numeral 10 denotes a rotational drive device for rotating the dehydration tank 6 around a horizontal axis 70, and the figure shows a hydraulic cylinder disposed between the machine frame 3 and the dehydration tank 6.

A long supporting member 11 is attached to one side of the dehydration tank 6, and a short receiving member 12 is attached to the other side.

An upper frame 14 is attached to the middle of the support member 11 via a horizontal pin 13 and is capable of vertically swinging, and a lid 16 is attached below the upper frame 14 via a plurality of cylinders 15. It is installed.

The lid 16 opens and closes the open upper end of the dehydration tank 6, and a gasket (not shown) that can come into contact with the outer edge of the open end of the dehydration tank 6 is attached to the outer periphery of its lower surface.

Reference numeral 17 indicates an air supply port formed in the center of the lid body 16.

The tip of the upper frame 14 can be brought into contact with the upper surface of the member 12, and a stopper 18 is provided there.

19 is an opening/closing drive device for opening and closing the lid 16, which includes a hydraulic cylinder 20 attached to the support member 11, a rope 22 provided between the tip of the piston rod 21 and the upper surface of the lid 16, and a hydraulic cylinder 20 attached to the support member 11; It consists of an idling roller 23 attached to the upper end of the support member 11 to guide the rope 22.

A hopper 24 supported by the machine frame 3 is provided below the dewatering tank 6, and the hopper 24 has an opening/closing shutter 25 at its lower end.

A belt conveyor 26 is provided extending from below the hopper 24 to the outside of the floating barge 1.

Reference numeral 21 indicates a sludge carrier that receives the dehydrated sludge 28 discharged from the belt conveyor 26.

Reference numeral 29 denotes a grab bucket device, which is installed on the floating barge 1 or the sludge carrier that has transported undehydrated sludge.

A sludge carrier full of chemically treated undehydrated sludge is docked on a floating barge 1.

At this time, the lid 16 of the air pressurized sludge dewatering apparatus 2 is moved upward as shown by the imaginary line in FIG. 2, and the top surface of the dewatering tank 6 is opened.

In this state, the grab bucket device 29 is operated to carry the undehydrated sludge from the sludge carrier into the dehydration tank 6.

When the dehydration tank 6 is full (predetermined amount), the hydraulic cylinder 20 is extended, the lid 16 is placed on the dehydration tank 6 as shown by the solid line in FIG. 2, and the stopper 18 is operated. The upper frame body 14 is integrated with the machine frame 3.

Such operations are sequentially performed on the adjacent sludge dewatering devices 2, and thus all the undehydrated sludge in the sludge carrier is unloaded.

The cylinder 15 of the sludge dewatering device 2 to which the lid 16 is applied is sequentially extended, thereby completely sealing the upper surface of the dehydration tank 6.

In this state, compressed air is supplied into the dehydration tank 6 through the air supply port 17.

As a result, the water content falls, flows into the dewatering space 9 through the filter cloth 8, and is further discharged through the drain pipe.

In this way, the undehydrated sludge in the dehydration tank 6 is turned into dehydrated sludge with a predetermined water content.

Thereafter, the stopper 18 is released while the cylinder 15 is contracted, and the hydraulic cylinder 20 is contracted to open the lid 16 as shown by the imaginary line in FIG.

Next, the rotation drive device 10 is operated to rotate the dehydration tank 6 around the horizontal axis I as shown in FIG.

As a result, the dehydration tank 6 is directed downward, and the dehydrated sludge 28 is discharged into the hopper 24.

After completely draining, the rotational drive device 10 rotates the dehydration tank 6 to return to its initial state.

The dewatered sludge 28 in the hopper 24 falls onto the belt conveyor 26 by opening the shutter 25, and is conveyed to the sludge carrier 27 by the belt conveyor 26.

Note that when the sludge dewatering device 2 is installed on the shore, the dehydrated sludge 28 can be loaded onto a truck by the belt conveyor 26.

As described above, according to the present invention, sludge can be quickly dehydrated mechanically by supplying compressed air into the dehydration tank sealed with the lid, and after opening the lid, the dehydration tank can be opened. By rotating the sludge so that it faces downward, the dehydrated sludge can be removed (drained) quickly and easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being an overall front view, and FIGS. 2 and 3 being longitudinal sectional side views showing the operating state. 1...Floating barge, 2...Air pressurized sludge dehydration device, 3...Machine frame, 6...Dehydration tank, 8... ... Filter cloth, 9 ... Dehydration space, 10 ... Rotation drive device, 14 ...
Upper frame body, 15...Cylinder, 16...
・Lid body, 17... Air supply port, 18...
- Stopper, 19... Opening/closing drive device, 24...
...Hopper, 26...Belt conveyor, 2
7... Sludge carrier, 29... Dehydrated sludge, 29... Grab bucket device.

Claims (1)

[Scope of utility model registration request] A dehydration tank rotatably attached to a machine frame, a rotation drive device for rotating the dehydration tank, a lid body attached to the dehydration tank side and capable of opening and closing an opening of the dehydration tank, and the lid. An air pressurized sludge dehydration device characterized by comprising an opening/closing drive device for opening and closing the body, an air supply port provided in the lid, and a filter cloth attached to the bottom inner surface of the dehydration tank.