JPH09811A - Container for separating precipitate, solid fine particle, etc. - Google Patents

Abstract

PURPOSE: To reduce the amount of liquid to be filtered by naturally precipitating precipitate, solid fine particles, etc., without subdividing suspension previously. CONSTITUTION: The middle part of the bottom board 11 of a container 10 for separation is curved inward, and the bottom board 11 is arranged slantingly in the bottom part of the container 10. On the peripheral surface of the container 10, a suspension discharge opening (lower discharge opening) 12 is formed at almost the same height as that of the bottom board 11, and a generally inverted L-shaped liquid discharge pipe 15 having a supernatant discharge opening 15a is installed above the opening 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation container suitable for separating a precipitate (sediment) or solid fine particles from a large amount of liquid for the purpose of analyzing trace constituents.
Prior to separating the precipitate (sediment) or solid fine particles from a large amount of liquid by filtration, the amount of the liquid containing the precipitate (sediment) or solid fine particles is significantly reduced,
The present invention relates to a separation container suitable for shortening the separation operation time.

[0002]

2. Description of the Related Art Conventionally, for example, in the case of concentrating trace elements in seawater, the target components are collected by passing the seawater through an adsorption minicolumn for collecting the trace components, or the ion exchanger powder or the like is added to the seawater. The operation of suspending the adsorbent, adsorbing a trace element on the adsorbent, and filtering the adsorbent is adopted. Alternatively, an operation of coprecipitating target ions by adding carrier ions to seawater and further adding a reagent to precipitate the carrier ions, and then filtering the precipitate is adopted.

[0003]

However, when the amount of seawater to be treated ranges from several tens to several hundreds of liters, this large amount of seawater is passed through an adsorption mini-column or is filtered by a small filter to obtain an analysis size. There is a problem that it is very time-consuming and inefficient to make it as small as 1.

Therefore, in the case of filtering with a filter, for example, the suspension or the like is preliminarily divided into a beaker of about 5 liters and allowed to spontaneously settle, and only the supernatant is discharged by decantation and filtered. Although a method of reducing the amount of liquid to be used is adopted, even in this case, it takes labor and time for subdivision, and there is a problem of poor efficiency.

Therefore, an object of the present invention is to provide a separation container in which precipitates, solid fine particles and the like are allowed to spontaneously settle and the amount of liquid to be filtered can be reduced without subdividing a suspension or the like. And

[0006]

To achieve the above object, according to the separation container of the present invention, in a separation container for separating precipitates or solid fine particles from a liquid, the container bottom plate is placed on the bottom of the container. Arranged at an inclination, on the side where the bottom plate on the side of the container is low, an outlet with the same height as the bottom plate,
Another feature is that another discharge port adjacent to this discharge port is provided.

Here, the bottom plate may be formed in a curved shape in cross section such that the central portion thereof is recessed.

[0008]

According to the separation container of the present invention, when the adsorbent (precipitate) such as the ion-exchanger powder or the solid fine particles having adsorbed the trace element or the like as the target component spontaneously settles, these are formed on the bottom plate of the container. Gather on the low side. Next, the supernatant liquid is discharged from the upper discharge port so that the sediments, solid fine particles, and the like that have naturally settled do not rise, and the amount of liquid to be filtered is reduced. The liquid to be filtered, including the naturally precipitated sediment, solid fine particles, etc., is taken out from the separation container through the lower outlet.

When the bottom plate is formed to have a curved cross-section, the stirring is smooth when adding an adsorbent such as ion-exchanger powder or when a precipitate is formed, and when the solid fine particles are spontaneously settled, the solid fine particles form a container bottom plate. Tends to collect on the lower side, and when the solid fine particles are taken out from the separation container, the solid fine particles can be easily washed.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the separation container of the present invention, and FIG. 2 is an enlarged perspective view of a suspension discharge port (lower discharge port) equipped in the separation container of FIG. FIG. 3 is an explanatory side view of the entire apparatus for separating solid particles equipped with the separating container of FIG.

The separating container 10 of this embodiment is, for example, a cylindrical container having an inner diameter of 400 mm and a height of 600 mm, and a bottom plate 11 thereof.
Is a concave cross-section with a concave central portion, one for being located at a height of 100 mm from the lower end of the separating container 10 and the other for being located at a height of 250 mm from the lower end of the separating container 10. It is arranged at the bottom of the container 10 in an inclined manner.

On the outer peripheral surface of the separation container 10 on the lower side of the bottom plate 11, the same height position as the bottom plate 10 (separation container 10
A suspension discharge port (lower discharge port) 12 is provided at a height of about 100 mm from the lower end of the suspension. As shown in FIG. 2, the suspension discharge port 12 includes a lower plate 13a and left and right side plates 1.
A liquid discharge pipe 13 having a tapered rectangular duct 13e composed of 3b, 13c and an upper plate 13d is attached. For example, the lower plate 13a is inclined downward by 15 ° with respect to the horizontal plane, and the upper plate 13d is inclined downward by 30 ° to 40 °, so that the precipitate ( The amount of sediment) is made as small as possible, so that the amount of washing liquid for washing away the residual sediment is made small.

The suspension discharge port 1 on the outer peripheral surface of the separation container 10
A hole 14 is provided above 2 to, for example, 160 mm, and a substantially inverted L-shaped liquid discharge pipe 15 having a supernatant liquid discharge port 15a is screwed into the hole 14 so as to prevent liquid leakage. The supernatant liquid discharge port 15a of the liquid discharge pipe 15 is
It is located below the hole 14 and above the suspension discharge port 12 and faces the lower side of the bottom plate 11. When the supernatant discharge port 15a is located at a height 120 mm below the hole 14, after discharging the supernatant, the separation container 10
The amount of residual liquid remaining in is about 600 ml. The supernatant discharge port 15a is inclined, for example, about 15 ° with respect to the horizontal plane so that a precipitate (precipitate) does not rise when discharging the supernatant.

In the case of concentrating trace elements in seawater, for example, in the separating container 10, the separating container 10 is mounted on a dolly 16 as shown in FIG. Attach mixer 17. Next, a fixed amount of seawater, which is the sample solution 18, is placed in the separation container 10, and a small amount of ion-exchanger powder is added to the seawater while being agitated by the agitator 17. When the mixture has been sufficiently agitated to reach equilibrium, the agitator 17 is removed, and the upper opening of the separation container 10 is closed with a lid 19 and left. As a result, the solid fine particles, which are ion-exchanger powders adsorbing trace elements in seawater, spontaneously settle on the lower side of the bottom plate 11 and are collected. When the solid fine particles completely spontaneously settle and are collected on the lower side of the bottom plate 11, the liquid discharge pipe 1 is passed through the supernatant liquid discharge port 15a.
The supernatant liquid is slowly discharged from the separation container 10 via 5 so that the solid fine particles that have naturally precipitated do not rise. After that, the solid fine particles are stirred with the seawater remaining in the separation container 10, and extracted as a suspension from the suspension discharge port 12 through the liquid discharge pipe 13 from the separation container 10,
Further, the solid fine particles remaining in the separation container 10 are washed away with pure water.

According to the above-mentioned embodiment, since the supernatant liquid can be discharged and the amount of liquid to be filtered can be greatly reduced, it is possible to divide the seawater containing the ion-exchanger powder into beakers for spontaneous sedimentation. You don't have to worry about it. Further, since the central portion of the bottom plate 11 is concavely concave and curved, the ion-exchanger powder can be smoothly stirred, and the solid fine particles which are ion-exchanger powder adsorbing trace elements in seawater are the bottom plate. It is easy to spontaneously settle on the lower side of 11 and collect, and further, the solid fine particles attached and remaining in the separation container 10 can be easily washed away. Therefore, the separation operation of the solid fine particles is efficient, and the operation time can be significantly shortened.

Next, this effect will be described based on a concrete experimental example.

Using the separation container 10 of the above embodiment, the radionuclide cesium-13 contained in 30 liters of seawater is used.
7 was collected by adding ammonium phosphomolybdate powder, which is an inorganic ion exchanger (Science and Technology Agency: Radioactivity Analysis Series No. 3 (1976)), divided into 5 liter beakers and filtered by decantation. Separation operation time is 1 / th compared to the conventional method of collecting with a reduced amount of liquid
Shortened to 6.

In the above embodiment, manganese dioxide powder was mixed with 50 liters of seawater and manganese dioxide powder contained in the seawater such as manganese, iron, cobalt, zinc, zirconium, niobium, ruthenium and cerium was added. When applied to a method of adsorbing to, collecting and filtering, the conventional method (Science and Technology Agency: Radioactivity Analysis Series N
o.13 (1982)), the filtration and recovery work is significantly reduced,
The working time required for sample pretreatment was reduced to about 1/10.

[0020]

As described above, according to the separation container of the present invention, the container bottom plate is arranged so as to be inclined, and
Since the discharge port is at the same height as the bottom plate and another discharge port adjacent to and higher than this discharge port, it is possible to divide the liquid into beakers and reduce the amount of liquid to be filtered by decantation. It is not necessary to do so, and the pretreatment operation time for collecting a trace amount component in a large amount of liquid and reducing it to an analysis size can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a separation container of the present invention.

FIG. 2 is an enlarged perspective view of a suspension discharge port (lower discharge port) equipped in the separation container of FIG.

FIG. 3 is an explanatory side view of the whole solid particle separation device equipped with the separation container of FIG.

[Explanation of symbols]

 10 Separation Container 11 Bottom Plate 12 Discharge Port (Suspension Discharge Port) 15a Discharge Port (Supernatant Discharge Port)

Claims (2)

[Claims] 1. A separation container for separating precipitates, solid fine particles, or the like from a liquid, wherein the container bottom plate is arranged at an inclination to the container bottom, and the same as the bottom plate on the side of the container where the bottom plate is low. A separation container, characterized in that a discharge port having a height and another discharge port adjacent to a position higher than the discharge port are provided. 2. The separation container according to claim 1, wherein the bottom plate is formed in a curved cross-section so that a central portion thereof is recessed.