JPH0137693Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is designed to prevent mud puddles and pipe clogging in a device that uses a dehydrator to separate mud water, which is factory wastewater, supplied from a thickening tank into mud and water. This is related to improvements to prevent this.

(Problems to be Solved by Prior Art and Ideas) Conventionally, there is a device as shown in the second figure as a device for separating factory wastewater supplied from a concentration tank into mud and water using a dehydrator. This conventional device will be explained below based on the drawings.

Mud water A, which is factory wastewater, is supplied from a mud water supply pipe 1 to a thickening tank 2 . This mud water A is intermittent and is supplied with various mud concentrations. A pipe 21 is provided for supplying muddy water A from the thickening tank 2 to the dehydrator 11 using the power of a pump 22.

However, the flow rate of the highly concentrated muddy water A is limited due to the processing capacity of the dewatering machine 11, so that mud pools or pipe clogging occur at the inlet of the pipe 21 in the lower part of the thickening tank 2. The dehydrator 11 transfers muddy water A to a drum 1.
The water B is sucked by the vacuum pump 16 through the cloth belt 131 of No. 3, and the water B is returned to the concentration tank 2 through the pipe 18 via the filtrate tank 15 and by the pump 17.

In this case, the dehydrated mud 19 is transferred to the cloth belt 1
Fall from 31 to Bucket 20. Also, dehydrator 1
The water C above the overflow pipe 5 of the muddy water A supplied to the tank 1 overflows and returns through the overflow pipe 5 to the water tank 4.
It is sent to the concentration tank 2 by the pump 7 and returned through the pipe 6'.

However, mud puddles or pipe clogging may occur at the bottom of the water tank 12. Therefore, there is a drawback that either the dehydrator 11 has to be stopped or the cloth belt 131 of the drum 13 breaks.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned drawbacks of the conventional devices, and its gist is that muddy water, which is factory wastewater supplied from a thickening tank, is processed into a dehydrator. A device for separating mud and water includes a mixing tank provided with a supply pipe that takes in mud from a thickening tank and overflowing mud water supplied to a dehydrator, and a mixing tank that supplies mixed water from the mixing tank to the dehydrator. This dewatering device is characterized by being provided with a supply pipe and a return pipe for returning mixed water from the mixed water supply pipe to the mixing tank for stirring.

(Embodiment) FIG. 1 is an explanatory diagram of one embodiment of the present invention.
Reference numeral 1 denotes a muddy water supply pipe that supplies muddy water A, which is factory wastewater, to the thickening tank 2. 3 is a state in which muddy water A of various concentrations is mixed in the thickening tank 2,
This is a supply pipe sent to the mixing tank 4.

Reference numeral 5 denotes an overflow pipe that sends overflow water C from the dehydrator 11 to the mixing tank 4, which will be described later. 6 is mixed mud water in which mixed mud water A' from the thickening tank 2 and overflow water C from the dehydrator 11 are mixed in the mixing tank 4 as described later.
7, which is a pipe that supplies A'' to the dehydrator 11;
8 is a pump and a valve provided in the middle of the pipe 6.

Reference numeral 9 denotes a return pipe taken out from between the pump 7 and the valve 8 of the piping 6 and returning the mixed water to the mixing tank 4 for stirring, and its tip extends radially below the water surface in the mixing tank 4. It has an injection port 10 that is branched into two.

Reference numeral 11 denotes a known dehydrator, which includes a water tank section 12.
One of the drums 13 is partially submerged in the water tank 12, and the other drum 132 is protruded outside the water tank 12, and a cloth belt 131 is stretched between the drums 13 and 132.

16 is a vacuum pump, which connects the filtrate tank 1
5, piping 14 and the drum 13, cloth belt 1
The mixed mud water A'' in the water tank section 12 is sucked through the filtrate tank 1 through the filtrate tank 18.
5 and returns to the concentration tank 2 via the pump 17.

Next, the functions and effects of the above embodiment will be explained. Mud water A, which is factory wastewater, and water B after dehydration filtrate are supplied into the concentration tank 2. Therefore, muddy water A and water B, which have different concentrations, are mixed, diluted, and made uniform. The muddy water A is sent to the mixing tank 4 through a large-diameter supply pipe 3 hanging perpendicularly from the bottom of the thickening tank 2. There will be no mud puddle at the bottom of the concentration tank 2, and no clogging of the supply pipe 3 will occur. Further, the clean water C in the water tank section 12 of the dehydrator 11 overflows and is sent into the mixing tank 4 through the overflow pipe 5.

The mixing tank 4 is a tank with a large capacity, and has the function of a reservoir in which the muddy water A' and the clean water C are mixed and stored. Therefore, the mud is likely to settle in the mixing tank 4. Therefore, while the mixed mud water A'' is being supplied from the mixing tank 4 to the water tank section 12 of the dehydrator 11, it is pressurized to a necessary degree by adjusting the pump 7 and valve 8 through the return pipe 9. The returned mixed muddy water A'' is injected from the injection port 10,
The mixed muddy water A″ in the mixing tank 4 is stirred.

This prevents the mud from settling in the mixing tank 4, and also reduces the density of the mud, so that the piping 6 will not be clogged.

In this way, the mixed muddy water A″ that has been mixed and diluted is
The dehydrated mud 19 and water B are separated by the action of a known dehydrator 11 and vacuum pump 16, and the dehydrated mud 19 falls and accumulates on the bucket 20 as the drums 13 and 132 rotate.

In this case, conventionally, the cloth belt 131
Since the drum 131 is braked by the mud accumulated on the drum 131, the drum 131 is no longer cut or cut because the mud accumulated on the drum 131 is not generated.

In other words, the apparatus of the example was able to operate without any trouble in dehydrating industrial wastewater.

(Functions and Effects) The present invention mixes muddy water, which is factory wastewater, with water after dewatering in a thickening tank, dilutes it, and stirs it, and further mixes the muddy water with clean water in the tank of the mixing tank in the mixing tank. The slurry is diluted by being stirred with the mixed mud water injected from the injection port of the return pipe, and sedimentation is prevented before being applied to the dehydrator, which may cause problems such as the drum stopping to rotate or the belt being cut. This device is extremely useful for practical use because it can perform dehydration and separation smoothly without any dehydration.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of one embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional device. 2: Concentrating tank, 3: Supply pipe, 4: Mixing tank, 5: Overflow pipe, 6: Piping, 9: Return pipe, 11: Dehydrator,
A: Muddy water, B: Water, C: Overflowing.

Claims (1)

[Scope of utility model registration request] In a device that separates muddy water, which is factory wastewater supplied from a thickening tank, into mud and water using a dehydrator,
A mixing tank equipped with a supply pipe that takes in the muddy water in the thickening tank and overflowing muddy water supplied to the dehydrator, a pipe that supplies mixed water from the mixing tank to the dehydrator, and mixing from the mixed water supply pipe. A dewatering device characterized by being provided with a return pipe for returning mixed water to the tank for stirring.