JPH01111490A - Biological film peel-off device for treatment device by biological film - Google Patents

Abstract

PURPOSE:To prevent peel-off water from scattering by jetting liquid downwardly to a filling material and installing a movable cylinder moving downwardly resisting to the encouraging force with said jetting pressure between the lower end of a nozzle for peeling off biological films adhered to the filling material and the upper end of the filling material. CONSTITUTION:Peel-off water is jetted out of a nozzle 13 mounted on a truck 11 in the state of stopping the transfer of the truck 11, and the pressure of water presses an orifice plate resisting to a spring at the time of flowing down through a space between the nozzle 13 and the outer periphery of the orifice plate and an orifice opening of the orifice plate, by which a movable cylinder 17 moves downward integrally with the orifice plate and the lower end of said movable cylinder 17 is brought into contact with the upper end of a filling material 4. The peel-off water jetted out of the nozzle 13, therefore, hits directly a space between a hollow section of the filling material 4 without scattering the plates through the movable cylinder 17 to peel off biological films adhered to the filling material 4 efficiently.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention is directed to a biofilm treatment device that uses microorganisms to decompose and purify organic gases such as air containing organic solvent gases discharged from factories, etc. The present invention relates to a film peeling device.

(Prior Art) When processing is performed using such an apparatus, microorganisms gradually proliferate, reducing processing efficiency.

For this purpose, a large number of packing materials that are open in the vertical direction and have biofilm attached to the surface are filled vertically into the treatment tower, and a liquid is injected downward toward the filling materials into the upper part of the tank. , a nozzle for removing attached biofilm is attached to a cart so that it can be moved, and for example, the cart is sequentially moved over a portion of the filling material and then stopped, and while the cart is stopped, a liquid is sprayed. The present applicant proposed in Japanese Patent Application No. 62-179181 to partially peel off the biofilm and thus optimally control the biofilm thickness of the entire filler material intermittently.

(Problem to be Solved by the Invention) In the above-mentioned preceding device, since the nozzle is sequentially moved onto a portion of the filling material using a cart, a distance is maintained between the lower end of the nozzle and the upper end of the filling material. This distance causes the liquid to scatter laterally, reducing the peeling efficiency.
The amount of water used will also increase.

(Means for Solving the Problems) Therefore, the present invention provides a nozzle that is mounted downward on a trolley.
It is characterized by having a movable cylinder that is movable downward against the urging force by the water pressure of the liquid to be injected.

<Example> In the illustrated example, l is a treatment tower, which has an intake port 2 for an organic gas fed under pressure by a blower F at the bottom side thereof, and a discharge port 3 for the treatment gas at the top. In the middle stage above the inlet 2, there is provided a group of fillers 4 having vertically continuous voids and having a microbial film mainly composed of filamentous bacteria adhered to the surface.

This filling material 4 may be a grid consisting of an assembly of multi-tubes, hemi-cam walls, and plates with the hollow portions oriented vertically, as well as flat plates, corrugated plates, wire rods, etc. arranged in the vertical direction. The surface is preferably smooth in order to make it easier to remove the microorganisms. still.

The hollow part of the filling material or the gap between the plates is 5 to 50II
11, preferably 10-20II11.

In the space 5 between the top of the treatment tower and the upper end of the 4 groups of fillers, a sprayer is used to spray stripping water sequentially from above onto some of the fillers to detach microorganisms growing on the surfaces of the fillers. A means 6 is provided, and a discharge pipe 7 is provided at the bottom of the tower to discharge the liquid to the outside, and is connected to a solid-liquid separator 8 such as a filter, and the solid content (sludge) separated by this is The liquid is discharged into system 9 and stored in storage tank 10.

The intermittent spraying means 6 is mounted on a cart 11 that reciprocates across all rows of filler material.

The trolley 11 is self-propelled and has rails 12 laid in the upper space 5.
Each filler row is guided by the machine and controlled by limit switches and reed switches.

It is possible to stop on n, m, rv. A header 14 equipped with a large number of nozzles 13 for spraying stripping water from above is provided along the row of fillers on this truck. Nozzle 13 is the second
As shown in the figure, the filling material is arranged so that water can be sprayed into the entire hollow part or gap between the plates in each row.

Of course, instead of providing a plurality of nozzles, one nozzle may be moved to inject water to one of the filler rows. Then, the end of the water supply pipe 15 of the separation water connected to the tower and the header 14 of the above-mentioned cart are connected to supply separation water to the header without any trouble even when the cart reciprocates across all the rows of fillers. Connect the flexible tube 16 so that it can be used.

As a result, the organic waste gas is blown into the inlet 2, the voids of the filler in all rows are directed upward, the organic components in the gas are captured by the microbial membrane, the gas is purified, and the gas is released from the outlet 3. can.

Then, when the microorganisms attached to the carrier proliferate and the contact surface area of the microbial film that comes into contact with the exhaust gas decreases, and the exhaust gas processing capacity decreases, the carrier is periodically moved and parked on each row of trolleys. , the removal water is injected from the nozzle 13 to remove the microorganisms adhering to the filling material in that row, and the film thickness is controlled to restore the exhaust gas treatment ability. Note that since the stripping water is discharged from the row of fillers that are being injected with the stripping water, exhaust gas is not blown into the rows of fillers from below. Therefore, during the stripping operation, the remaining filler rows and exhaust gas are purified, so that operation can be continued.

In the illustrated embodiment, the peeling water is pumped from the storage tank 10 and used for circulation, but the present invention is not limited to this, and tap water, industrial water, etc. can also be used.

Moreover, a microorganism culture component may be included in this.

Now, the lower end of each nozzle 13 attached downward to the header 14 is spaced upward from the upper end of the filler 4 so as not to interfere with the movement of the cart 11.

In order to eliminate the above-mentioned interval when spraying the peeling water, a movable cylinder 1 is provided on the outer periphery of the nozzle 13 for each book so as to be able to slide in the vertical direction.
7 is fitted, and the lower half of this movable cylinder is extended downward from the nozzle.

The movable cylinder 17 is made of rubber, and a metal cylinder 18 is attached to the inner periphery of its upper half by adhesive or the like in order to improve the slippage between the movable cylinder 17 and the outer periphery of the nozzle, and to fix members to be described later. Radial spoke arms 19' are provided on the inner periphery of the lower end of this metal tube 18.
A support member 19 with diameter, and there is an orifice hole 2 that opens vertically on the periphery.
An orifice plate 22 having a plurality of 1... is fixed, and
An annular stopper 23 is fixed to the lower end of the inner periphery of the nozzle 13 by screwing and attaching it, and a spring 24, for example a coil spring, is inserted between the annular stopper 23 and the orifice plate 22. The movable tube 17 is lifted up elastically together with the orifice plate, and the lower end of the movable tube is moved upward from the upper end of the filler 4 by a little, for example, 5 mmQl.

As a result, the cart 11 stops moving, and the peeling water is sent to the nozzle 1.
3, the water flows down through the gap between the inner periphery of the nozzle and the outer periphery of the orifice plate, and through the orifice hole 21 of the orifice plate.
2 is pushed down, whereby the movable cylinder 17 moves downward together with the orifice plate, and its lower end abuts the upper end of the filling material.

Therefore, the peeling water injected from the nozzle passes through the movable tube 17 and directly hits the hollow part of the filler 4 or the gap between the plates, thereby efficiently peeling off the attached biofilm.

When moving the cart 11 onto the next row of fillers, either stop spraying the stripping water or lower the water pressure and release the spring 2.
4, lift the movable cylinder 17 together with the orifice plate 22, and move the lower end of the movable cylinder upward away from the upper end of the filler.

<Effects of the Invention> According to the present invention, it is possible to prevent the separation water from scattering when the separation water is injected while maintaining a distance between the lower end of the nozzle and the upper end of the filler, and the amount of water used and the injection time can be reduced. The biofilm can be removed efficiently.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing an outline of an embodiment of the present invention, Fig. 2 is an explanatory view showing the arrangement of the filler and nozzle in Fig. 1, and Fig. 3 is an enlarged longitudinal side view of the main parts of the present invention. In the figure, 1 is a processing tower, 2 is an exhaust gas intake port, 3 is a processing gas discharge port, and 4
is a filler, 13 is a nozzle, 17 is a movable cylinder, 24 is a spring,
I, II, III, and ff indicate columns in which fillers are divided.

Claims (1)

[Scope of Claims] A large number of packing materials that are open in the vertical direction and have biofilm attached to the surface are filled vertically into a treatment tower, and a liquid is placed in the upper part of the tank in a downward direction toward the filling materials. In a biofilm peeling device of a biofilm treatment device, a nozzle for spraying liquid and peeling off attached biofilm is movably mounted on a trolley. A biofilm stripping device for a biofilm treatment device, characterized by having a downwardly movable tube.