JPH0576587U - Waste liquid treatment tank - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently remove the sludge of light specific gravity contained in the waste liquid by efficiently floating it to the liquid surface. [Structure] A second baffle plate 7 facing the baffle plate 6 with the sludge discharge port 5 interposed is provided, and the second baffle plate 7 is provided.
Since a plurality of through holes 8 through which the sludge S having a light specific gravity blocked by the baffle 7 is passed through, the sludge having a light specific gravity of the waste liquid dropped into the tank 1 can be efficiently provided, Moreover, it can be reliably floated to the liquid surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waste liquid treatment tank for separating and removing sludge of light specific gravity contained in waste liquid discharged from a coating booth or the like.

[0002]

[Prior Art]

 The waste liquid discharged from the coating booth contains a large amount of light specific gravity sludge such as paint debris that has been detackified with a killer agent, and in order to reuse this waste liquid as industrial water, it is a light specific gravity sludge. Need to be fully removed. As a means of removing this light specific gravity sludge, the waste liquid is dropped from one end of the waste liquid treatment tank, the sludge floating on the liquid surface is blocked by a baffle plate, and the sludge discharge port opened on the side wall of the tank. At the same time, the waste liquid flowing under the baffle plate is filtered with a strainer to clean it, and then sucked out of the tank.

[0003]

[Problems to be solved by the device]

 However, in the conventional waste liquid treatment tank, the waste liquid creates a strong flow along the bottom of the tank due to the momentum when it is dropped into the tank, so the sludge of light specific gravity contained in the waste liquid is The waste liquid, which still contains a large amount of sludge, does not float sufficiently in the foreground and passes under the baffle plate, and then an upward swirl flow is generated to reach the strainer. I had a problem of clogging the strainer.

Further, even if the baffle plate is extended downward and the distance between the bottom end of the baffle plate and the bottom of the tank is narrowed to prevent the waste liquid containing the sludge having a light specific gravity from flowing into the strainer side, If you try to maintain the amount of wastewater that is sucked and discharged through the baffle as usual, the flow velocity of the waste liquid that passes under the baffle plate will be accelerated, which will promote the flow of the waste liquid that crawls on the bottom of the tank and There was a problem of avoiding surfacing and hindering it.

Therefore, the present invention provides a waste liquid treatment tank capable of efficiently floating the sludge of light specific gravity contained in the waste liquid to the liquid surface and reliably removing the sludge, and it is a technical problem to prevent clogging of the strainer. ..

[0006]

[Means for Solving the Problems]

 In order to solve this problem, in the waste liquid treatment tank according to the present invention, the sludge of light specific gravity floating on the liquid surface of the waste liquid dropped into the tank from one end side of the tank is dammed in the upper layer of the waste liquid. , A baffle that guides to the sludge discharge port opened on the side wall of the tank, and a strainer that filters the waste liquid that passes under the baffle and is sucked and discharged from the other end of the tank to the outside of the tank. In the waste liquid treatment tank, a second baffle facing the baffle plate is provided across the sludge discharge port, and the second baffle plate is a light baffled by the baffle plate. It is characterized by multiple through holes that allow sludge of specific gravity to pass through.

[0007]

[Action]

 According to the present invention, the flow of the waste liquid dropped into the tank from one end side of the tank produces an upward vortex when passing through the second baffle plate provided in front of the slag discharge port. Most of the sludge with a light specific gravity contained in the waste liquid floats on the liquid surface along this vortex flow efficiently, is blocked by the baffle, and is reliably discharged from the sludge discharge port.

Further, since most of the sludge with a light specific gravity floats up in front of the baffle due to the generation of the vortex flow, the waste liquid containing a large amount of sludge with a light specific gravity passes under the baffle as in the conventional case. It does not slip through and reach the strainer, preventing clogging of the strainer with sludge.

Further, the sludge having a light specific gravity that floats on the liquid surface before the second baffle plate and is blocked by the baffle plate passes through a plurality of through holes formed in the baffle plate and the sludge discharge port. Since it is discharged from the sludge, it can be reliably removed without the sludge accumulating on the liquid surface.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an example of a waste liquid treatment tank according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view showing a second baffle plate which is a main part thereof.

In FIG. 1, an outlet 2 is provided above the right end side of the waste liquid treatment tank 1 having a depth of about 3.4 m to drop the waste liquid discharged from the coating booth (not shown) into the waste liquid treatment tank 1. The pipe 3 is supported and fixed.

A sludge discharge port 5 is formed on the side wall 4 of the waste liquid treatment tank 1, and a baffle plate 6 and a second baffle plate 7 are arranged to face each other with the sludge discharge port 5 interposed therebetween. As shown in FIG. 2, the baffle plate 6 is made of a metal plate provided with a certain inclined portion for guiding the blocked sludge S having a light specific gravity to the sludge discharge port 5, and a position approximately 1.4 m from the bottom of the tank 1. It is fixed to.

Further, as shown in FIG. 3, the second baffle plate 7 is made of a metal plate having a plurality of through holes 8 through which the blocked sludge S having a light specific gravity passes and which is opened from the bottom of the tank 1. It is installed at a position of about 1.6 m. The baffle plate 6 and the second baffle plate 7 are set to have a length such that the upper end of the baffle plate 6 and the second baffle plate 7 are higher than the liquid surface so that the sludge S floating on the liquid surface can be blocked.

On the left end side of the waste liquid treatment tank 1, a strainer 9 for filtering the waste liquid that has passed under the baffle plate 6 is provided in two stages, and passes through the strainer 9 for purification. A pump 10 for sucking and discharging the waste water is disposed outside the tank 1.

However, when the waste liquid containing light sludge S such as paint dust discharged from the coating booth is dropped from the outlet 2 of the waste liquid pipe 3 into the waste liquid treatment tank 1, the flow of the waste liquid is An upward vortex is generated when passing through the second baffle plate 7.

At this time, the light specific gravity sludge S contained in the waste liquid is easily separated from the water by the killer agent, and the light specific gravity sludge S is generated when the waste liquid is dropped into the tank 1. Since the air bubbles are easily attached to the bubbles generated by entraining air, they are attached to the bubbles that vigorously rise to the liquid surface along the upward vortex of the waste liquid, and efficiently rise to the liquid surface along the upward vortex. Will be done.

The sludge S floating on the liquid surface is guided by the inclination of the baffle plate 6 and discharged from the sludge discharge port 5 to the outside of the tank. It should be noted that the sludge S with a light specific gravity that floats on the liquid surface in front of the second baffle plate 7 and is blocked by the baffle plate 7 passes through the through holes 8 formed in the upper part of the baffle plate 7. Since it moves to the plate 6 side and is discharged from the discharge port 5, the sludge S is completely removed without being accumulated on the liquid surface.

Further, since the sludge S having a light specific gravity in the waste liquid is almost floated up and removed before the baffle plate 6 as described above, the waste liquid containing a large amount of sludge is conventionally strainer 9. The strainer 9 can be prevented from clogging without flowing into the side.

Then, the waste liquid filtered and cleaned by the strainer 9 is sucked out of the tank by the pump 10 and reused as industrial water such as cleaning water. The vertical lengths of the baffle plate 6 and the second baffle plate 7 and the positions of the baffle plates 6 and 7 can be appropriately changed according to the size of the waste liquid treatment tank 1, the amount of waste liquid flowing in, and the like.

[0020]

[Effect of the device]

 As described above, according to the present invention, there is an excellent effect that the sludge having a light specific gravity contained in the waste liquid dropped into the tank can be efficiently floated and reliably removed. In addition, the waste liquid containing a large amount of sludge does not flow into the strainer side, and there is a great effect that clogging of the strainer can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of a waste liquid treatment tank according to the present invention.

FIG. 2 is a plan view of a waste liquid treatment tank according to the present invention.

FIG. 3 is a front view of a second baffle plate which is a main part of the waste liquid treatment tank according to the present invention.

[Explanation of symbols]

 1 ... Tank 2 ... Inflow port 5 ... Sludge discharge port 6 ... Baffle plate 7 ... Second baffle plate 8 ... Through hole 9 ... Strainer 10 ... Pump

Front page continued (72) Inventor Naoki Masui 1-9 Kakimoto-cho, Toyota-shi, Aichi Trinity Industry Co., Ltd. Incorporated (72) Inventor Hideaki Nakasho 1-9 Kakimotocho, Toyota City, Aichi Prefecture Trinity Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A side wall of the tank (1), in which sludge (S) having a light specific gravity that floats on the liquid surface of the waste liquid dropped from one end side of the tank (1) to the upper surface of the waste liquid is blocked. Baffle plate (6) guided to the sludge discharge port (5) opened in (4)
And a strainer (9) for filtering the waste liquid that passes under the baffle plate (6) and is sucked and discharged from the other end of the tank (1) to the outside of the tank. A second baffle plate (7) facing the baffle plate (6) with the discharge port (5) interposed is provided, and the second baffle plate (7) is blocked by the baffle plate (7). A waste liquid treatment tank having a plurality of through holes (8) for allowing the sludge (S) having a light specific gravity to pass therethrough.