JPS58223412A - Treatment of polluted water - Google Patents

Abstract

PURPOSE:To make a soln. contg. adequately dissolved flocculating agents suppliable to polluted water continuously for a long time by packing the solid flocculating agents in a water permeable containing body, and bringing water forcibly into contact with the flocculating agents. CONSTITUTION:A water permeable containing body 2 packed therein with a solid flocculating agent 3 is suspended in a hopper 1. Three kinds of different flocculating agents; A, B, C are packed in the body 2. A water spray nozzle 4 for spraying water to the body 2 is provided in the upper part. In the case of treating polluted water by using a dissolving device of such solid flocculating agents, the supernatant water of a clarifier is supplied through a submersible pump to the nozzle 4 from which said waer is sprayed onto the water permeable containing bodies A, B, C. When the water is sprayed, the flocculating agents in the body 2 dissolve gradually and are added into the polluted water through a pipe or the like from the liquid outflow port 3 in the bottom of the hopper.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simple and effective method for treating polluted water.

Conventionally, methods for treating polluted water have mostly involved dissolving flocculants in water and using them in liquid form.

However, when turning into a liquid, substances with very poor solubility require a special dissolving device. When adding liquefied products to polluted water, it is difficult to finely adjust the consistency, so there is a tendency to add too much.

The present inventor has completed the present invention as a result of repeated research in order to solve these conventional drawbacks.

That is, in the present invention, at least two or more types of solid flocculants are used in combination in a water-permeable container.

This method of treating polluted water is characterized by forcibly bringing the coagulant into contact with water to dissolve the coagulant, and adding the dissolved solution to the polluted water.

The present invention takes advantage of the poor solubility in water, which has conventionally been considered a drawback of some types of flocculants. Therefore, it is preferable to control solubility by granulating a material with good solubility using a binder or the like.

The present invention involves filling a water-permeable container with a solid flocculant,
It is characterized in that at least two or more types of flocculants are used in combination.

Further, in the present invention, by forcibly bringing water into contact with these flocculants, a solution containing an appropriately dissolved flocculant can be continuously supplied to polluted water for a long period of time.

As the water-permeable storage body in the present invention, various types can be used, such as a bag made of cloth, a net, etc., and a cylindrical body having porous holes.

Further, as the flocculant to be used, different types of flocculants such as anionic flocculants, cationic flocculants, nonionic flocculants, amphoteric flocculants, inorganic flocculants, etc. can be appropriately selected and combined. It is also possible to use two or more types of flocculants of the same type, such as anionic flocculants.

Next, the present invention will be explained with reference to the drawings.

Figure 1 shows an example of a device for forcing the FC flocculant into contact with water by filling a water-permeable primary container, and Figure 2 is a cross-sectional view of the section A-A in Figure 1. 0 1 is a hopper, 2 is a water permeable container, 3 is a solid flocculant, 4 is a water nozzle, and 5 is a liquid outlet. First, a water-permeable container (bag) 2 filled with a solid flocculant 3 is suspended in a hopper 1 .

The water-permeable storage bodies 2 are A and B as shown in FIG.

It is filled with 3 different flocculants. Hopper 1
A water spray nozzle 4 for spraying water onto the water-permeable storage body 2 is provided at the upper part of the housing.

When treating polluted water using such a solid flocculant dissolving device, for example, in the case of a talarifier, the supernatant water of the talarifier is supplied to the water spray nozzle 4 via a submersible pump, and the water-permeable storage body A, Spray on B and O. When the water is sprayed, the flocculant in the permeable container 2 is gradually dissolved into the polluted water via a pipe or the like from the liquid outlet 3 at the bottom of the hopper.

In addition, the water-permeable A mesh body is made of # outside the bag body, plastic, iron,
A columnar structure made of aluminum, wire mesh, etc. may be divided into two or more chambers by partition plates 6, and different types of flocculants may be filled in the chambers (see FIG. 3). Note that when using materials such as iron, plastic, and aluminum, it is necessary to make the material porous so that water can pass through it.

Further, as shown in FIG. 4, at least one injection nozzle 7 is provided on the side wall of the hopper 1 diagonally to the side wall, and air or water is ejected from the injection nozzle 7 to create a vortex in the water in the hopper 1 and harden it. It is also possible to forcibly contact the shape flocculant 3. In this case, when water is injected from the injection nozzle 7, the supply of water from the water spray nozzle 4 can be omitted.

According to the method of the present invention, even if the properties of polluted water change over time, it can always be treated appropriately.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a flocculant dissolving device used in the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an example of a water-permeable storage body. FIG. 4 is a sectional view of the melting device of the modified type shown in FIG. 1. Patent applicant: Nippon Solid Co., Ltd.

Claims (1)

[Claims] At least two kinds of solid flocculants filled in a water-permeable container are used together, the flocculants and water are forcibly brought into contact to dissolve the flocculants, and the dissolved solution is added to the polluted water. A method for treating polluted water characterized by the following.