JPH06104235B2 - Slurry suction transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a sludge tank for sucking and transferring a viscous slurry such as organic sludge produced by an activated sludge method from the sludge tank by using a vacuum pump. The present invention relates to the structure of the discharge part of the slurry storage tank.

(Prior Art) Although liquid waste and solid waste are inevitably generated in our daily lives, such waste is being regenerated daily.

By the way, these sludge treatment measures require a transfer means to transfer the sludge from the tank that contains the sludge, which is an indispensable facility, but sludge is in a viscous slurry state, so it cannot be transferred. In general, suction transfer or suction transfer using a vacuum pump (2) as shown in FIG. 2 is generally adopted, and a vacuum is applied to the discharge port of the slurry tank (1) having a gas vent (4). A transfer pipe (3) such as a hose connected to a pump is connected and transferred.

(Problems to be solved by the invention) However, in the conventional suction transfer by the vacuum pump, since the slurry is in a viscous state, the hose is likely to be clogged, and therefore the capacity of the vacuum pump is involved and the suction is performed upward. In order to do so, the degree of vacuum and the pump capacity increase, resulting in high cost, and with a normal pump, it is possible to increase to at most 1.5 m, and even if the pump capacity is increased to at most 4 m. It was good. Moreover, the transfer amount is 3000 l /
Even if a vacuum pump of min was used, only 0.2 m ³ could be transferred for 1 minute.

SUMMARY OF THE INVENTION The present invention addresses the above situation and aims to increase the transfer amount and smooth the transfer without increasing the capacity of the vacuum pump, and improves the discharge part of the slurry storage tank to add the slurry in the hose. The purpose is to improve the movement.

(Means for Solving the Problems) The apparatus of the present invention adapted to the above object is characterized in that a transfer pipe such as a hose is connected to a discharge port of a slurry tank containing a slurry such as sludge, and a slurry pump is used by using a vacuum pump. In the slurry discharge part in which a hose is connected to the discharge part of the conventional device for sucking and transferring, a compressed air pipe is installed on the slurry discharge side so as to eject compressed air,
An air supply hole is provided at each of the front and rear positions of the compressed air pipe with the tip end position as the middle position so that air can flow in.

Here, the air supply holes are usually required to be provided before and after the tip position of the compressed air pipe, and the distance from the tip position may be different, but it is preferable to make them as close as possible to each other.

Also, connect an air supply pipe equipped with a valve to this air supply hole,
It is also a preferred embodiment that the air inflow rate is adjusted and adjusted.

(Operation) When configured as described above, the sludge such as sludge discharged through the discharge part is forcibly sent by the compressed air jet from the compressed air pipe to move, but at this time, the air inflow from the front and rear air supply holes As a result, the slurry material is cut and intermittently formed, and the slurry material and the air space are alternately generated as shown in FIG.
This facilitates the transfer action as a fragmentary transfer of the slurry and eliminates the need for increasing the capacity of the vacuum pump as in the continuous transfer of the slurry.

Conventional slurry transfer is because the slurry is continuous,
The frictional resistance with the transfer pipe becomes large and clogging is likely to occur, but in the present invention, the frictional resistance is reduced due to the existence of the fragments of the slurry and the air space alternately as described above, and the flow can be smoothed. Becomes

Embodiment An embodiment of the device of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a main part configuration of the present invention in which the slurry discharge part of the slurry tank (1) shown in FIG. 2 is enlarged, and a hose or the like is transferred to the discharge port (1a) at the bottom of the slurry tank (1). A pipe (3) is connected, and a compressed air pipe (5) connected to a compressor (not shown) outside the tank is inserted in the discharge port (1a) with a valve (6). The tip opens into the discharge port (1a).

The discharge port (1a) further sandwiches the tip end position of the compressed air pipe (5), and air supply holes are provided through air supply pipes (7), (8) having valves on both sides thereof, that is, front and rear, respectively. Is provided.

In this case, the position of the air supply hole needs to be before and after the tip position of the compressed air pipe (5), and the distance from the tip position to each air supply hole position does not matter, but it is substantially equal to the center axis. It is most effective to open symmetrically.

Further, it is also effective to arrange a valve in each of the air supply pipes (7) and (8) to adjust and adjust the air supply amount. The air to be fed may not be compressed air in particular, but compressed air may be introduced.

The device of the present invention has the above-described structure, and when the slurry product is transferred using this device, the slurry product intermittently becomes a slurry product fragment (9) as shown in FIG. An air space (10) is interposed in the middle to move the inside of the transfer pipe (3).

In this case, the reason why the slurry (9) becomes fragments is not clear, but the slurry is pushed by the compressed air ejected from the compressed air pipe (5) while the first air pipe (7) is pushed. The continuous cord of the slurry is partially weakened by the inflow of air from the air supply hole of the above, and these are further promoted by compressed air, and the weakening is further promoted by the inflow of air from the second air supply pipe (8), and finally The air flows into the air space (10) and the slurry fragments (9)
It seems to form between.

In fact, by observing the inside of the hose, it is a slurry (9).
It is observed that the fragment becomes a fragment and progresses.

A 165 mmφ hose and a vacuum pump with a capacity of 3000 l / min were used to suction and transfer sludge slurry from a food processing plant at a vacuum of 150 Torr.
Although it was impossible to lift at the position of about 6 m, it was possible to lift up to about 6 m in the case of providing an air feed hole of 8 mmφ according to the present invention.

In addition, when we investigated the transfer rate of both in the wickable range,
For those without air vents, it was about 0.2m ^{3 for} 1 minute at best, but when air vents were installed, it was 0.5m ³ for 1 minute and 1m for 2 minutes.
³ was transferred, and the effect of the device of the present invention was extremely large.

(Effects of the Invention) In the apparatus of the present invention, a compressed air pipe is arranged and suction holes are formed before and after the tip end of the compressed air pipe for suction transfer of the slurry as described above. The slurry that is pushed forward by the jet of compressed air by the opening of the pipe moves in a fragmentary state inside the transfer pipe, and the frictional resistance between the transfer pipe and the slurry is greatly reduced compared to the conventional continuous transfer. It enables smooth transfer with less resistance in the pipe, does not increase the cost associated with the increase in pump capacity, increases the suction efficiency and suction transfer speed, and does not cause clogging in the transfer pipe and It has a remarkable effect that is very useful and economical as a suction transfer device.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a main part of the device of the present invention, and FIG. 2 is a schematic diagram showing an outline of a slurry suction transfer device. (1) …… Slurry tank, (1a) …… Discharge port, (2)
...... Vacuum pump, (3) …… Transfer pipe, (5) …… Compressed air pipe, (7), (8) …… Air pipe, (9) …… Slurry fragment, (10) …… Air space .

Claims (1)

[Claims] 1. A device in which a transfer pipe such as a hose is connected to a discharge port of a slurry tank containing slurry such as sludge, and a slurry is sucked and transferred using a vacuum pump, and compressed air is discharged to the tank discharge part. A slurry suction / transfer device characterized in that a compressed air pipe is installed so as to eject toward the side, and an air supply hole is provided before and after the compressed air pipe end position of the discharge portion as an intermediate position.