JP2926070B2 - Coagulation sedimentation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sewage containing various waste liquids discharged from small-scale factories (hereinafter referred to as "sewage").
The present invention relates to an improvement in a coagulation and sedimentation apparatus used for purification treatment of ash.

[0002]

2. Description of the Related Art Conventionally, in the purification treatment of sewage by the coagulation and sedimentation method, while supplying air or oxygen to the sewage, the sewage is stirred by a stirring mechanism, and chemicals and bacteria are multiplied. The reaction is carried out in two tanks: a stirring tank for oxidizing or reducing the water and a sedimentation tank for sedimenting suspended suspended solids, oxides or reduced products obtained by completing the reaction in the stirring tank.

However, in small factories, for example, lens polishing wastewater, plating wastewater, ceramic wastewater, wastewater for printed circuit board production, wastewater for various surface treatments such as alumite,
The amount of sewage to be treated at one time is about 1,000 liters for the washing sewage etc. of the printing shop. The above two tanks are large-scale and require a large installation area or complicated daily management. In a small-scale factory or the like, it is difficult to install this device.

[0004] A compact, compact reactor capable of performing the agitation reaction of sewage, which solves the above-mentioned problems, the drainage of purified water generated by the completion of the reaction, and the sedimentation and discharge of suspended solids and the like in the same tank. A coagulation settling apparatus suitable for treating a relatively small amount of various kinds of sewage is disclosed in Japanese Patent Application Publication No. 55-11885.
And is currently used in small factories at various locations.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 3 is a side view showing the internal configuration of the apparatus, and FIG. 4 is a plan view of FIG. In these figures, 1 is an upright cylindrical tank body, 1a is an inclined bottom disposed from one side of the tank body 1 to the other side, 2 is an upper surface of the tank body 1 along the upper surface of the inclined bottom 1a, An air supply pipe extending to the vicinity of the lowest portion of the inclined bottom 1a and provided with a forked branch portion 2b having a plurality of blowout holes 2a formed at the tip thereof, 3 is the deepest portion of the tank wall 1b of the tank body 1. Outlet of purified water treated from sewage 6 provided in the middle part of the side
Reference numeral 3a denotes a discharge port for the treated coagulated sediment of the sewage 6 provided at the deepest part on the deepest part side of the tank wall 1b of the tank body 1.
Reference numeral 2d denotes a blower device, and 3b denotes a wall for preventing discharge of residual suspended matter from the drain port 3.

In this manner, a chemical such as a neutralizing agent and a coagulant is added to the sewage 6 sent to the tank body 1, and the air from the blower device 2 d is supplied through the air supply pipe 2 to the above-mentioned bifurcated water. When violently ejected from the fumarole 2a of the branch portion 2b, the ejected air rises from the deepest part of the tank body 1 with the surrounding sewage 6 as shown by the arrow in the figure.
And naturally flows in the direction of the center of the tank body 1 and decelerates due to the resistance of the sewage 6 itself and the tank wall 1b, and reaches the vicinity of the opposite tank wall 1b while being decelerated. By the applied force, the fluid flows back toward the shallow part of the inclined bottom 1a. By repeating this reflux, stirring, oxygen supply, and chemical reaction are effectively performed. After the reflux for a set time (about 30 minutes), the aggregate is settled and deposited in the deepest part direction of the tank body 1 by being kept for a set time (about 60 minutes). Then, the upper drain port 3 is opened to drain the treated purified water, and after draining the purified water, the lower drain port 3a is opened to drain the settled aggregates.

[0007]

The above-mentioned coagulation and sedimentation apparatus raises and branches sewage in the tank body, and collides and merges on the other side along the inner circumference of the tank body to form a decelerated downflow.
It is intended to achieve the purpose of stirring in a short stirring time, it is configured in a small device, the installation area may be small, and has an excellent effect on the purification treatment of sewage discharged little by little. As mentioned in the technical section, it is still used in many small factories.

[0008] However, this apparatus is optimal for the purification treatment of low-concentration sewage. However, unlike high-concentration sewage such as aqueous paint sewage and aluminum die-casting release agent sewage, unlike the low-concentration sewage, this apparatus has a low concentration. In the case of stirring for a set time, a sufficient reaction cannot be obtained,
It is necessary to change the set stirring time or to reprocess the purified water and sludge obtained by the conventional method. In addition, the generated sediment agglomerates have a high viscosity, and the sediment sticks to the slanted bottom portion and the sediment discharge port of the sediment, so that the treatment capacity gradually decreases and the apparatus cannot be used. It has been used exclusively for purification treatment of low-concentration sewage. The present invention has been made in view of the above problems, and an object of the present invention is to provide an improved one-tank type coagulation and sedimentation apparatus which does not cause any problem even when used for purification treatment of high-concentration sewage.

[0009]

In order to achieve the above object, an apparatus for coagulating and settling according to the present invention comprises: an upright cylindrical tank body having an inclined bottom formed from one side to the other side; An air supply pipe, which is disposed from above the tank body on the upper surface from the higher portion to the lower portion, and has a forked branch portion in which a plurality of blast holes are drilled in the lower portion direction of the inclined bottom, In the middle part of the tank wall at the deepest side of the tank body, there is a drain port for treated purified water containing wastewater, and at the deepest part on the deepest side, there is a drain port for treated flocculated sediment. The coagulation and sedimentation devices provided respectively include a swing prevention device for a bifurcated branch portion of the air supply pipe erected on a lower portion of the inclined bottom, and a vibration generator attached to a lower surface portion of the inclined bottom. Things.

The swing prevention device is erected from the vicinity of the lowest part of the inclined bottom to the middle part on the deepest part side of the tank body, and the lower end part thereof is a forked part of a forked branch part of the air supply pipe. It is preferable to use an anti-swing plate designed to intervene in the vehicle. Preferably, the vibration generator is an ultrasonic generator. Further, the vibration generator may be a vibrator.

[0011]

[Function] Since the swing prevention device for the bifurcated branch of the air supply pipe is provided upright at the lower part of the inclined bottom, the swing of the bifurcated bifurcation due to the violent fumarolic action is prevented, and the air with sewage is removed. By reducing the fluctuation, the upward flow is rectified and the return speed of the wastewater is remarkably accelerated. In this way, the amount of sewage recirculation within the conventional stirring set time is increased, and it is possible to cope with the purification treatment of high-concentration sewage. Since the vibration generating device is attached to the lower surface of the inclined bottom, by operating this device during the residence time after the reflux stirring in the purification treatment of high-concentration sewage, sticking of the coagulated sediment to the inclined bottom is prevented. You. This device can purify low concentration sewage and high concentration sewage by itself.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of a coagulation sedimentation apparatus,
FIG. 2 is a plan view of FIG. In these figures, 1 is an upright cylindrical tank body, 1a is an inclined bottom provided from one side of the tank body 1 to the other side, and 2 is an upper surface of the tank body 1 along the upper surface of the inclined bottom 1a. A forked bifurcation 2 extending to the vicinity of the lowest portion and having a plurality of fumaroles 2a in the direction of the lowest portion.
b, an air supply pipe provided with b, 3 is a drain port of treated purified water provided at an intermediate portion on the deepest part side of the tank wall 1b of the tank body 1, 3a is a deepest part on the deepest part side of the tank wall 1b of the tank body 1. Numeral 4 is a mud port for coagulated sediment provided in the section, and 4 is erected from the vicinity of the lowest part of the inclined bottom 1a to the middle part on the deepest side of the tank body 1, and the lower end part thereof is a fork of the air supply pipe 2. The anti-swing plate 5 of the bifurcated branch 2b designed to intervene in the bifurcated portion 2c of the bifurcation 2b is an ultrasonic generator as a vibration generator attached to the lower surface 1c of the inclined bottom 1a. . In addition, 2d is a blower blower, 3b is a wall for preventing discharge of residual suspended matter from the drain port 3, and 6 is sewage.

The coagulation and sedimentation apparatus is constructed as described above, and the sewage 6 is supplied to the tank body 1 and the required chemical liquid is added thereto, and the air from the blower blower is supplied through the air supply pipe 2 to the bifurcated branch 2b. Is ejected from the fumarole 2a, the mixed liquid of the sewage 6 and the chemical solution repeats reflux as described in the section of the prior art, and the stirring and the treatment reaction are effectively performed (set time: about 30 minutes). . Then, the agitation is stopped and settled (set time: about 60 minutes), thereby completing the sedimentation and accumulation of the aggregate that has been subjected to the processing reaction at the deepest part of the tank body 1.
Then, the treated purified water is drained from the drain port 3, and then the coagulated sediment is discharged from the drain port 3a.

However, in the present embodiment, the swing prevention plate 4 interposed in the forked portion 2c of the forked branch portion 2b of the air supply pipe 2 is arranged such that the rocking prevention plate 4 is located from the vicinity of the lowest portion of the inclined bottom 1a to the deepest portion of the tank body 1. As described in the section of the operation, the forked bifurcation 2b is held by the swing prevention plate 4 to prevent the forked bifurcation 2b from being violently fumed. The swing of the air accompanying the sewage is reduced to rectify the upward flow, so that the return speed of the sewage is remarkably accelerated and the amount of the return increases. For this reason, the purification treatment of the high-concentration sewage which makes the reaction treatment difficult within the set time is achieved. By using the ultrasonic generator 5 attached to the lower surface of the inclined bottom 1a, the adhesion of the high-concentration aggregates to the inclined bottom 1a is prevented, so that no trouble is caused by the adhesion. Note that a vibrator device may be used instead of this device. The coagulating sedimentation apparatus of this embodiment is:
It is economical because it can handle low-concentration sewage and high-concentration sewage by itself.

[0015]

The present invention has the following effects due to the above-mentioned structure. The bifurcated part of the bifurcated branch of the air supply pipe is made by the swing prevention plate,
Since it is held at a predetermined position on the inclined bottom, the swing of the forked branch due to the violent fumarolic action is prevented, the swing of the air accompanying the sewage is reduced, the upward flow is rectified, and the reflux speed is reduced. It is remarkably accelerated, the amount of recirculation within the set time increases, and it is possible to cope with the purification process of high-concentration sewage that could not be purified within the set time. Since the vibration generating device is attached to the lower surface of the inclined bottom, it is driven during the purification treatment of the high-concentration sewage, so that there is no trouble due to the adhesion of the coagulated sediment to the inclined bottom. It is economical because low-concentration sewage and high-concentration sewage can be used together with a single device. It has a simple configuration, is easy to manufacture, and can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a coagulation sedimentation apparatus of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a configuration of a conventional coagulation and sedimentation apparatus.

FIG. 4 is a plan view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank body 1a Slant bottom 1b Tank wall 1c Lower surface part 2 Air supply pipe 2a Spray hole 2b Bifurcated branch part 2c Bifurcated part 3 Drain outlet 3a Drainage outlet 4 Swing prevention device 5 Vibration generator 6 Sewage

Claims (4)

(57) [Claims] 1. An upright cylindrical tank body 1 having an inclined bottom 1a formed from one side to the other side, and an upper surface of the inclined bottom 1a from a higher portion to a lower portion thereof, which is disposed from above the tank body 1. And a plurality of blast holes 2a in the lower part direction of the inclined bottom 1a.
And a supply pipe 2 having a bifurcated branch portion 2b with a hole formed therein. A drain port 3 for purified water treated from sewage 6 containing various waste liquids in an intermediate portion on the deepest side of the tank wall 1b of the tank body 1 However, in the coagulation sedimentation apparatus provided with a discharge port 3a for coagulation sediment treated from the sewage in the deepest part on the deepest part side, the air supply pipe 2 erected at a lower part of the inclined bottom 1a A coagulation sedimentation device comprising a swing prevention device 4 for the forked branch portion 2b and a vibration generator 5 attached to the lower surface portion 1c of the inclined bottom 1a. 2. The swing preventing device 4 is mounted on the inclined bottom 1a.
Is formed so as to extend from the vicinity of the lowest part to the middle part on the deepest part side of the tank body 1 and its lower end part is designed to intervene in the forked part 2c of the forked branch part 2b of the air supply pipe 2. The coagulation sedimentation apparatus according to claim 1, which is a plate. 3. The coagulation sedimentation apparatus according to claim 1, wherein said vibration generator 5 is an ultrasonic generator. 4. The coagulation sedimentation apparatus according to claim 1, wherein the vibration generator 5 is a vibrator.