JPH07195100A - Sludge treating device - Google Patents

Abstract

PURPOSE:To continuously treat a large amt. of sludge by combining a sludge force feed pipe, a polymer flocculating agent soln. injecting pipe joining therewith, an air adding pipe joining therewith, a stirring pipe continuous with the press feed pipe and a separating pipe continuous therewith with each other. CONSTITUTION:Sludge raw water A is forcibly fed from the force feed pipe 1 and a polymer flocculating agent soln. B is injected from the injecting pipe 2. Air C is added to the air adding pipe 4. The polymer flocculating agent soln. B flowing from a tangent direction to the sludge raw water A and the air C are then added and mixed in the adding section X and the mixture D composed thereof is transported to the stirring section Y. The mixture D is turned in a direction a in the stirring section Y and is prevented from being arrested by the wall of the stirring pipe 6 by the added air C. The sludge raw water A is adequately flocculated by the polymer flocculating agent soln. B and is transported to the separating section Z. Further, the air C is made to escape and the sludge raw water A is separated and discharged to flocs E and separated excess water F in the separating section Z.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating sludge generated in a column jet grout method.

[0002]

2. Description of the Related Art In recent years, environmental problems have been emphasized, and it has become difficult to handle industrial waste. In particular, reduction treatment of sludge such as slime generated by the column jet method is required.

On the other hand, the conventional treatment is mainly batch mixing, in which the raw water of sludge is stored in a dedicated water tank, a chemical solution is added, and the mixture is stirred and separated. Therefore, since these steps are performed in batch, the throughput is limited and low. On the other hand, line mixing is known in which the addition, stirring, and separation of a chemical solution are continuously performed in a single pipe to process a large flow rate. However, in the conventional line mixing, a turbulent flow generation projection is provided in the pipe in order to improve the stirring ability. However, in the case of sludge containing cement or the like, the sludge may be caught by the protrusions and may accumulate on the back side (downstream side) of the protrusions and solidify, which is not preferable.

An object of the present invention is to provide a sludge treatment device capable of continuously treating a large amount of sludge.

[0005]

The present invention is directed to a sludge raw water pressure feed pipe for feeding sludge raw water, a chemical liquid injection pipe for obliquely joining the sludge raw water pressure feed pipe, and joining the sludge raw water with a tangential direction to inject a chemical liquid, and the chemical liquid injection. An air addition pipe that obliquely joins the pipe and joins from the tangential direction to add air, and a stirring pipe that is continuous with the sludge raw water pressure feed pipe,
It consists of a separation tube continuous to the stirring tube.

The agitating tube has the following features to enhance the agitating ability.
It is preferable to lengthen the pipe or provide a bent portion in the middle.

Further, in order to enhance the separating ability, it is preferable that the separation tube has a large diameter, for example, about 2.5 times the diameter of the stirring tube.

[0008]

In the sludge treatment apparatus configured as described above, by adding air, the mixture of sludge and the chemical solution in the stirring pipe is not caught on the wall of the stirring pipe, and the stirring ability is improved. Therefore, chemical addition, stirring, and separation are continuously performed in a single conduit, and a large flow rate can be processed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, in the middle of the sludge pumping pipe 1 for pumping the sludge A, a polymer flocculant solution injection pipe 2 for injecting a chemical solution, that is, a polymer flocculant solution B, obliquely joins to the downstream side and joins from a tangential direction. ing. A ball valve 3 is provided on the upstream side of the injection pipe 2, and an air addition pipe 4 equipped with a ball valve 5 for adding air C is provided on the downstream side obliquely to the downstream side and joined from the tangential direction. There is. And the injection pipe 2 of the pressure feed pipe 1
An addition portion X having a length L1 is formed on the downstream side of the.

A stirring pipe 6 having the same diameter as that of the pressure feeding pipe 1 is connected to the downstream side of the pressure feeding pipe 1, and the downstream side of the stirring pipe 6 is
The separation pipe 7 is connected. The small diameter portion 7a of the separation tube 7
Is formed to have the same diameter as the stirring tube 6, and the small diameter portion 7a thereof has
Larger diameter (eg, 2.5 times) than the stirring tube 6 via the expanded diameter portion 7b
The large-diameter portion 7c of is connected. The small diameter portion 7a and the large diameter portion 7b of the stirring pipe 6 and the separation pipe 7 form a stirring portion Y having a length L2, and the large diameter portion 7c forms a separation portion Z having a length L3.

Next, the operation will be described.

During the treatment, the sludge raw water A is pressure-fed through the pressure feed pipe 1, the polymer coagulant solution B is injected through the injection pipe 2, and the air C is added through the air addition pipe 4. Then, in the addition section X, the polymer flocculant solution B and the air C, which obliquely flowed into the sludge raw water A from the tangential direction, are added and mixed, and the mixture D of A, B, and C is sent to the stirring section Y. . In the stirring section Y, the mixture D is swirled in the direction of the arrow a, and the added sludge C does not catch the sludge raw water A on the polymer coagulant solution B by the added air C.
Are preferably aggregated by and are sent to the separating section Z. In the separating section Z, the air C is released and separated into flocculates, that is, flocs E and separated surplus water F and discharged.

The stirring capacity of the stirring section Y is determined by the capacity of the sludge raw water pressure pump, the diameter of the stirring tube 6 and the length L2. However, when the length L2 is restricted by the space, it is preferable to interpose a curved pipe 8 as shown in FIG. 2 in the middle of the stirring pipe.

[0014]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to continuously treat a large flow rate of sludge by line mixing by increasing the stirring ability by adding air.

Further, since the mixture is appropriately stirred by the added air without being caught in the stirring tube, it can be used not only for the slime of the jet grout method, but also for the mixing of powdery particles or the mixing of fluid and powdery particles. It can be suitably implemented.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side view showing an example of a curved pipe.

[Explanation of symbols]

 A ... Raw sludge water B ... Polymer flocculant solution C ... Air D ... Mixture E ... Floc F ... Separation surplus water X ... Addition part Y ... Stirring part Z・ ・ ・ Separator 1 ・ ・ ・ Sludge pumping tube 2 ・ ・ ・ Polymer flocculant solution injection tube 3, 5 ・ ・ ・ Ball valve 4 ・ ・ ・ Air addition tube 6 ・ ・ ・ Stirring tube 7 ・ ・ ・ Separation tube 7a ... small diameter part 7b ... expanded part 7c ... large diameter part 8 ... curved pipe

Claims (1)

[Claims] 1. A sludge raw water pressure feed pipe for feeding sludge raw water under pressure,
The sludge raw water pressure-feeding pipe obliquely joins from the tangential direction to inject the chemical liquid, the chemical liquid injection pipe diagonally joins the chemical liquid injection pipe and joins from the tangential direction to add air, and the sludge raw water pressure-feeding pipe A sludge treatment device comprising a stirring tube continuous with the tube and a separation tube continuous with the stirring tube.