JPS6119839Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas blowing device for blowing stirring gas into sludge in a sludge tank.

As shown in Figure 1, a closed anaerobic digestion tank 1
In order to promote the digestion of the thickened sludge 2 stored in the tank, the gas 3 in the digestion tank 1 is normally pressurized by a blower 4 and blown into the thickened sludge 2 by a gas blowing device 5 to agitate the thickened sludge 2. ing. Here, the gas blowing device 5 is attached to the inside of the digestion tank 1 by a pipe 6, and as shown in FIG. It has a plurality of nozzles 8 inserted into the support body 7 and attached radially.

However, in such a conventional gas blowing device 5, the nozzle 8 is constituted by a pipe 10 having a vent 9, as shown in FIG. filament 1 of
Since it contains a lot of 1, this is the vent 9.
There is a problem with getting tangled with the .

Therefore, an object of the present invention is to prevent the filament from becoming entangled with the nozzle.

In order to achieve this purpose, the present invention provides a cylindrical nozzle support in the vertical direction within the sludge tank, communicates with the nozzle support, and has a side wall with an appropriate number of notches formed at the lower end and a side wall at the tip. A plurality of nozzles with open bottom ends each having a top plate with a downward slope facing toward the other end are attached radially to the nozzle support.

Therefore, the gas inlet is formed by the water seal each time the operation is performed, and even if the filament gets entangled with the inlet formed by the water seal during operation,
When the nozzle is stopped, it will naturally fall off due to gravity falling, which not only prevents the above-mentioned thread-like bodies from getting entangled, but also because the top plate of the nozzle is sloped downward toward the tip. The cross-sectional area of the nozzle gradually increases from the side to the proximal end, allowing a larger amount of air to pass through the proximal end than the nozzle distal end. This makes it possible to make the amount of gas blown into the gaps uniform.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 and 5. In FIG. 4, 12 is a cylindrical nozzle support that receives pressurized gas;
It is arranged vertically inside a sludge tank such as an anaerobic digestion tank by a pipe 6 as shown in FIG.
This nozzle support 12 has a large-diameter body portion 13 and a bottom portion 14 . In this embodiment, horizontal radial nozzles 15 are attached to the body 13 of the nozzle support 12 at six locations.
communicates with the nozzle support 12 through a communication port 16. The nozzle 15 is composed of a top plate 17 that slopes downward toward the tip, vertical side plates 18, and a tip closing plate 19, and the lower ends of the side plates 18 and the closing plate 19, which serve as side walls, are open. hand,
An opening 20 as shown in FIG. 5 is also formed.
A suitable number of triangular notches 21 are formed in the side plate 18.

In such a configuration, when pressurized gas 22 is supplied into the nozzle support 12, this gas 22 enters the nozzle 15 through the communication port 16 and pushes down the sludge 2 in the nozzle 15, as shown in FIG. 5a. The air bubbles 24 escape from the top 23 of the notch 21 and are blown into the tank. That is, a gas inlet 25 is formed in the opening 20 of the nozzle 15 by a water seal, and in this embodiment, this inlet 25 is
will appear at the top 23.

In addition, since the top plate 17 has an inclined structure, the nozzle cross-sectional area gradually increases from the tip side to the base end side of the nozzle 15, and the amount of air passing through the base end side of the nozzle 15 can be larger than that at the tip side. As a result, the amount of gas blown into each notch 21 can be made equal.

Now, as shown in Figure 5a, the air inlet 2 is closed during operation.
Even if the filament 11 happens to become entangled with the nozzle 15, if the operation is stopped, the sludge 2 will enter the nozzle 15 through the opening 20 as shown in FIG. . Therefore, during the next operation, the above-mentioned entanglement will be resolved, and there will be no possibility of problems occurring due to this.

Note that, as in the above embodiment, the side plate 1 of the nozzle 15
By forming a triangular or other notch 21 in the sludge 8, the position of the inlet 25 can be specified, and the sludge 2 can be stirred properly. In addition to the anaerobic digestion tank 1 shown in FIG. 1, it can be widely used as a gas blowing device with a small pressure difference, and is particularly useful as a large-capacity, low-pressure type.

As described above, according to the present invention, the gas inlet is formed by a water seal each time the operation is started, and even if a filament gets entangled with the inlet formed by the water seal during operation, when the gas is stopped, If this happens, it will naturally fall off due to gravity falling, which not only prevents the above-mentioned thread-like bodies from getting entangled, but also because the top plate of the nozzle is sloped downward toward the tip, so that it will fall off naturally from the tip side of the nozzle. The cross-sectional area of the nozzle gradually increases toward the proximal end, allowing for a larger amount of air to pass through the proximal end than the nozzle distal end. The amount of gas blown can be made uniform.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an anaerobic digestion tank equipped with a conventional gas blowing device, Fig. 2 is an enlarged view of the gas blowing device in Fig. 1, and Fig. 3 is a cross-sectional view of the nozzle in Fig. 2; Figure 4 shows an embodiment of the present invention;
Figures a and b are cross-sectional views of the nozzle in Figure 4. 1... Anaerobic digestion tank (sludge tank), 3... Gas,
12... Nozzle support, 15... Nozzle, 18...
...Side plate (side wall), 19...Closing plate (side wall).

Claims (1)

[Scope of utility model registration request] A cylindrical nozzle support is provided vertically in the sludge tank, and communicates with the nozzle support, and has a side wall with an appropriate number of notches formed at the lower end, and a top plate that slopes downward toward the tip. A gas blowing device characterized in that a plurality of nozzles each having an open bottom end are radially attached to the nozzle support.