JPS6344402B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sedimentation separator used in factory waste liquid treatment, water treatment, other wastewater treatment, and the like.

``Prior Art'' Various types of precipitation separators have been proposed in the past, and there are also various technical documents. For example, the precipitation separator disclosed in Japanese Patent Publication No. 49-46823 forms a diamond-shaped container, a conical partition is inserted inside the upper cone of this container via a flow passage, and the undiluted solution is placed in the upper part of the container. It has a structure in which an inlet pipe is connected to a discharge pipe at its lower end, and the discharge pipe connected to the conical partition wall is extended outside the container, and supernatant liquid and sludge are communicated through an inclined flow path. It is separated and forms a large supernatant liquid storage chamber. And Tokkosho, who was on the same track with this invention.
No. 52-15148 or improved version 57-35366
There are numbers etc. In addition, the wastewater treatment equipment disclosed in Japanese Patent Publication No. 58-29122 is equipped with a cylindrical coagulation-sedimentation tank that incorporates a sludge retention tank, a sludge stirring section, a sludge thickening section, etc. It purifies.

``Problems to be Solved by the Invention'' Although the invention according to the above-mentioned technical document has a relatively simple structure, since the direction of flow of the stock solution and the direction of coagulation and settling of the sludge are the same,
Although the separation efficiency of the supernatant liquid and sludge is good, when the supernatant liquid and sludge separated in the flow path flow down from the tip, a part of the sludge certainly sinks along the inner wall of the cone. However, the other part is caught up in the upward flow of supernatant liquid. This phenomenon occurs strongly in fine particle sludge, and it is not necessarily thought that it will be separated into a clean supernatant liquid as ideally.
Another technical document, Japanese Patent Publication No. 58-29122, uses coagulation sedimentation and sand filtration, and although homogeneous filtration is achieved, the structure is complicated and the device may become quite large.

``Means for Solving the Problems'' In view of the above, the present invention has a simple structure and allows for smooth separation of supernatant liquid and sludge, thereby obtaining a clean supernatant liquid. be. The gist is that a supernatant liquid discharge pipe is installed vertically in a container consisting of a cylindrical part and a conical part that converges downward. A separator device consisting of a separator, a second separator shaped like an inverted umbrella with openings, and a third umbrella-shaped separator is provided, and the supernatant liquid is separated by this separator device and the conical part of the container. A retention chamber is formed, and the stock solution flowing into the container is caused to fall in the radial direction through the first separator to perform the first treatment, and then to the center through the second separator. The liquid is allowed to flow down toward the third separator through the opening in the center of the second separator to perform the second treatment, and the stock solution subjected to the second treatment is radiated through the third separator. After that, the supernatant liquid is discharged from the supernatant liquid discharge pipe through the supernatant liquid retention chamber, and the separated and agglomerated sludge is provided at the lower end of the conical part. The sludge is discharged through a sludge discharge pipe.

"Function" Next, to explain the function of the present invention, the stock solution introduced into the stock solution storage chamber through the stock solution introduction pipe (not shown) is
The liquid is allowed to flow down through the opening made in the stock solution storage chamber, and first flows down the slope of the umbrella-shaped first separator in the radial direction, and as it spreads downward, it flows into the stock solution. The floating sludge is separated and captured and agglomerated on this slope. This phenomenon increases as the water flows down, and as it approaches the lower end of the slope, the settling speed increases and flocs are formed. So-called first processing is performed. Subsequently, the flow flows down the inclined surface of the second separator having an inverted umbrella shape toward the center, and as it converges downward, the sludge floating in the stock solution is separated, and the flocs are tilted. It slides down the surface and grows even bigger. This is accelerated as the slope approaches the convergent part, and solid-liquid separation of sludge separation and floc growth occurs actively.
Then, this processing stock solution flows down onto the inclined surface of the third separator through an opening formed in the center of the second separator. So-called second processing is performed. This second treatment stock solution flows down the inclined surface of the umbrella-shaped third separator in the radial direction, and the aforementioned solid-liquid separation is further promoted to perform the third treatment. As a result, the grown flocs slide down the inner wall surface of the conical portion of the container, reach the sludge discharge port, and are discharged to the outside from the sludge discharge pipe. On the other hand, the separated supernatant liquid reaches the supernatant liquid storage chamber, where the minute sludge contained in the supernatant liquid is further separated and sedimented, and finally the separated supernatant liquid The liquid rises at a slow rate and is discharged to the outside via the supernatant liquid discharge pipe. By repeating these operations, the stock solution is sequentially processed.

``Embodiment'' The drawing shows an embodiment of the present invention, in which 1 is a container consisting of a cylindrical portion 2 and a conical portion 3 that converges downward, and in this example, an upper opening 1a of the container 1 is shown.
A stock solution reservoir chamber 4 is formed in the chamber. Although not shown in the drawings, the stock solution storage chamber 4 is provided with a stock solution inlet pipe, and also has a supernatant liquid discharge pipe 5 vertically installed therein. The tip of this supernatant liquid discharge pipe 5 reaches approximately two-thirds of the cylindrical portion 2. 6 in the figure is an opening made in the stock solution storage chamber 4. Reference numeral 7 denotes an umbrella-shaped first separator whose base cylinder part is located at the lower part of the stock solution storage chamber 4 and which is fitted to the upper end of the supernatant liquid discharge pipe 5. Inclined surface 7a widening downward
A first flow path 8 is formed between the base portion 7b, the inner wall of the cylindrical portion 2 of the container 1, and the inclined surface of a second separator, which will be described later. Reference numeral 9 denotes a second separator in the form of an inverted umbrella whose base cylinder part is fitted into the lower part of the supernatant liquid discharge pipe 5, and this second separator 9 converges downward and toward the center of the container 1. It has an inclined surface 9a and a petal tip 9b.
is attached or crimped to the inner wall of the cylindrical portion 2 of the container 1. Slightly above the base cylinder portion of this second separator, several openings 10 are provided through which the second treatment stock solution flows down. Also, a first flow path 8 is provided between the slope 9a of the second separator 9 and the base portion 7b of the first separator 7.
As mentioned above, is formed. 1
Reference numeral 1 denotes an umbrella-shaped third separator whose base cylinder part is fitted at the lower part of the supernatant liquid discharge pipe 5 and connected to the base cylinder part of the second separator 9; Separate body 1
1 has an inclined surface 11a that expands downward in the radial direction of the container 1, and is substantially symmetrical with the second separator 9. A second flow path 12 is formed between the base portion 11b of the third separator 11 and the inner wall of the cylindrical portion 2 of the container 1. In this example, the second separator 9 and the third separator 1
1 are separated from each other, but it is of course possible to use an integrated structure. Also, the first separation body 7~
The third separator 11 constitutes a separator device. 1
Reference numeral 3 denotes a supernatant liquid storage chamber having a substantially tortoise-shell shape and consisting of the container 1, the lower end of its cylindrical portion 2, and a third separator 11. In this supernatant liquid storage chamber 13, processing is performed as described later. The fine sludge contained in the supernatant liquid is separated and sedimented. 14 is a sludge discharge port provided in the converging portion of the conical portion 3, and 15 is a sludge discharge pipe thereof. 16 is a frame that supports the container 1.

Next, to explain the operation of the present invention, the stock solution introduced into the stock solution storage chamber 4 through the stock solution introduction pipe (not shown) flows down through the opening 6 formed in the stock solution storage chamber 4. First, the sludge flows down the slope 7a of the umbrella-shaped first separator 7 in the radial direction, and as it spreads downward, the sludge floating in the stock solution is separated and captured on the slope 7a. Agglomerated.
This phenomenon increases as the flow descends, and the slope 7a
As it approaches the lower end, its sedimentation speed increases and flocs are formed. Then, it flows down the first flow path 8 and is subjected to the first treatment. Subsequently, the flow flows down the inclined surface 9a of the second separator 9, which has an inverted umbrella shape, toward the center, and as it converges downward, the sludge floating in the stock solution is separated, and the sludge is separated from the flocs. slides down the slope 9a and grows even larger. This phenomenon is accelerated as the slope approaches the convergent portion of the slope 9a, and solid-liquid separation, ie separation of sludge and growth of flocs, is actively carried out. This processing stock solution is then flowed down to the inclined surface 11a of the third separator 11 through the opening 10 formed in the center of the second separator 9, and is subjected to a second treatment. This second treatment stock solution flows down the inclined surface 11a of the umbrella-shaped third separator 11 in the radial direction, and the aforementioned solid-liquid separation is further promoted to perform the third treatment. As a result, the grown flocs slide down the inner wall surface of the conical portion 3 of the container 1, reach the sludge discharge port 14, and are discharged from the sludge discharge pipe 15 to the outside. On the other hand, the separated supernatant liquid reaches the supernatant liquid storage chamber 13, where the minute sludge contained in this supernatant liquid is further separated and sedimented, and finally the separated supernatant liquid reaches the supernatant liquid storage chamber 13. The clear liquid rises at a slow speed and is discharged to the outside via the supernatant liquid discharge pipe 5. By repeating these operations, the stock solution is sequentially processed.

``Effects of the Invention'' As described in detail above, the present invention provides a supernatant liquid discharge pipe vertically installed in a container with separator devices such as the first to third separators, and transfers the stock solution to these separators. As the sludge is bypassed through the device to separate the sludge and the supernatant liquid, and the sludge is captured and coagulated, the separation efficiency mentioned above is extremely high, and even the smallest sludge can be captured and coagulated. The supernatant can be collected. In addition, since holes are provided in the second separator and the processing stock solution is passed through the holes, it is possible to promote the aggregation of minute sludge and generate flocs, which allows for more efficient capture and coagulation. I can do it. Furthermore, the first separated body ~
If a separator device such as the third separator is fitted into the supernatant liquid discharge pipe, maintenance and management of these separator devices becomes easy and very rational.

[Brief explanation of drawings]

The drawing is a sectional view of a main part showing an embodiment of the present invention. 1... Container, 2... Cylindrical part, 3... Conical part, 4
...Standard solution storage chamber, 5...Supernatant liquid discharge pipe, 6,10...
...Opening hole, 7...First separation body, 8...First flow path,
9...Second separated body, 11...Third separated body, 12...
...Second flow path, 13...Supernatant liquid retention chamber, 14...
Sludge discharge port, 15...Sludge discharge pipe.

Claims (1)

[Scope of Claims] 1. A supernatant liquid discharge pipe is installed vertically in a container consisting of a cylindrical part and a conical part that converges downward, and an umbrella-shaped liquid discharge pipe is sequentially formed from the top to the bottom of the supernatant liquid discharge pipe. A separator device consisting of a first separator, a second separator shaped like an inverted umbrella with openings, and a third umbrella-shaped separator is provided, and the separator device and the conical part of the container are connected to each other. A supernatant liquid storage chamber is formed, and the stock liquid flowing into the container is caused to fall in a radial direction through a first separator to perform a first treatment, and then to be passed through a second separator. The liquid is allowed to flow down toward the center and through the opening in the center of the second separator to the next third separator to perform the second treatment, and the second-treated stock solution is passed through the third separator. After that, the supernatant liquid is discharged from the supernatant liquid discharge pipe through the supernatant liquid storage chamber, and the separated and flocculated sludge is sent to the conical part. A sedimentation separator characterized in that the sludge is discharged through a sludge discharge pipe provided at the lower end. 2. The precipitation separation device according to claim 1, wherein the separator device is detachably attached to a supernatant liquid discharge pipe.