JP2002102892A - System for continuously granulating and solidifying material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economically excellent system capable of directly and continuously granulating and solidifying a material with high water contents with high efficiency using a necessary amount of a solidifying agent. SOLUTION: The solidifying system for continuously granulating and solidifying the material (a) with high water content to be treated such as muddy water, sludge or the like, is equipped with a supply means 1 of the material (a) to be treated capable of adjusting a supply amount, at least one stirring feed means 9 or 10 capable of adjusting a feed amount and continuously stirring the material (a) to be treated to feed the same and charging means 13 and 14 of solidifying materials A and B for continuously granulating and solidifying the stirred and fed material (a) to be treated. The charging amounts of the solidifying materials A and B by the charging means 13 and 14 can be adjusted and the solidifying materials A and B are charged on the feed start end side of the stirring feed means 9 and 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous granular solidification system for continuously granularly solidifying a highly water-containing material such as muddy water or mud.

[0002]

2. Description of the Related Art Surplus soil generated during various constructions, for example, excavation surplus generated during shield construction or construction of continuous underground walls, hydrous residual soil during foundation work, and waste mud dredging work such as bentonite Hydrous residual soil and slime treated residual soil when constructing cast-in-place piles contain a large amount of water, and especially in mixed mud soil such as bentonite and cement,
Since they show high alkalinity, these residual soils are transported to an industrial waste intermediate treatment plant, where they are neutralized.
It has been subjected to granular solidification through the steps of precipitation, concentration, solidification, and drying.

More specifically, a coagulant or the like is generally added to an object to be treated to separate the precipitate into supernatant water, and the precipitate is solidified by solar drying. Therefore, there is a problem in that the drying time is 2 to 4 days, and a large treatment plant is required. In addition, there is a problem in that the supernatant water (processed polluted water) needs to be separately disposed. there were.

[0004] For this reason, in recent years, an amount of solidified material and an object to be treated corresponding to the properties and the water content of the object to be treated are charged into a stirring tank to solidify the object to be treated with high water content. To be processed.

[0005]

However, in the above-mentioned processing technique, although the object to be processed can be solidified in a short time and in a narrow space, it is a batch processing. However, there was a problem in that the processing efficiency was low.

Further, it is very difficult to determine the amount of the solidified material to be added in consideration of the properties of the material to be treated and the water content. However, resuming the processing is a waste of time, so that the current situation is that the solidifying material is often added more than necessary, which is economically wasteful.

[0007] The present invention has been made in view of such circumstances, and an object of the present invention is to directly and continuously process a highly water-containing object using a minimum necessary solidifying material. Moreover,
An object of the present invention is to provide a highly economical system capable of solidifying particles with high efficiency.

[0008]

That is, a solidification system according to the present invention for continuously granulating solids containing high water content, such as muddy water or muddy soil, according to the present invention, is a method for supplying an object to be processed whose supply amount can be adjusted. Means, at least one stirring / transporting means for adjusting the conveyance amount and continuously stirring and conveying the object to be processed, and for solidifying the object to be stirred and conveyed in granular form Characterized in that the solidification material is supplied to the transfer start end side of the object to be processed by the stirring and conveyance means by configuring the amount of the solidification material to be supplied by the addition means to be adjustable. (Claim 1).

According to the above-mentioned system, the object to be treated is quantitatively supplied to the stirring and conveying means, and the solidified material is introduced into the object to be stirred and conveyed, whereby the object to be processed is uniformly solidified. The required minimum amount of solidified material is obtained by observing the processing status of the initial solidified soil (processed material) and then increasing or decreasing the amount of the solidified material to be added to the material to be processed later based on the observation. Depending on the amount, the material to be treated with high water content can be directly and continuously made highly efficient and granular solidified treated soil without economical waste.

If the solidified material is concentrated at the starting end of the object to be conveyed and is solidified, the object is solidified at once, and it is difficult to stir and convey the object. The solidified material is also supplied in the middle of the transport path of the object to be processed (claim 2). In this way, the solidified material is dispersed and supplied to the transport start end side of the workpiece and the middle of the transport path. In this case, the object to be processed can be easily agitated and transported, and the object to be processed is sequentially and uniformly solidified in a granular form.

When the material to be treated is acidic in property as a solidifying material, it can be neutralized by using a cement-based material or a lime-based material.

On the other hand, cement-based and lime-based solidified materials
If the material to be treated is in the neutral region, the material to be treated is altered to alkaline, or if the material to be treated is mixed mud with highly alkaline bentonite or cement, it cannot be neutralized. Recycling of the soil is restricted, but in this case, it is preferable to use a neutral solidifying material that neutralizes the object to be treated as the solidifying material (claim 3).

By adjusting the amount of the solidifying material to be added in accordance with the properties of the object to be treated, the object to be treated can be neutrally solidified in a short time, so that the effective use range of the object to be treated is greatly expanded. be able to.

The entire system described above may be kept at a factory or a processing site. However, for example, when the processing site moves little by little or when the mobility of the processing site is changed, the system can be installed in an improved manner. It is desirable that the processing object supply means and the stirring and conveying means are mounted on a self-propelled traveling vehicle body.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a configuration in which a continuous granular solidification system for a workpiece is mounted on a self-propelled traveling vehicle body, and FIGS. 2 and 3 show a longitudinal side view and a cross-sectional end view of the system.

In these figures, reference numeral 1 in the drawings denotes a supply means for supplying a high-content workpiece a such as muddy water or mud, for example, a storage hopper 3 for supplying the workpiece a through a hose 2 under pressure.
And a continuous feeder 4 for the workpiece a which is supplied downward from the hopper 3. The hopper 3 is provided with a stirring device 5.

The continuous feeder 4 includes a transport screw 6 for the workpiece a built in the drum 7, and has a diameter and a pitch of the transport screw 6 according to the transport amount (the throughput) of the workpiece a. Are selected and installed.

The transport screw 6 is driven by, for example, a drive rotating means 8 by an inverter motor, and the number of revolutions of the transport screw 6 is appropriately adjusted according to the transport amount of the workpiece a. Although not shown, the supply means 1 for the workpiece a is provided with a flow meter for measuring the transport amount of the workpiece a.

Reference numerals 9 and 10 denote first and second stirring and conveying means arranged in series to continuously stir and convey the object a, and convey the object a with the paddle 11 for kneading the object a. The stirring and transporting device 13 having a structure combined with the blade 12 is built in the drum 14.

The first agitating / conveying means 9 at the former stage is provided with a receiving port 15 for the to-be-processed object a which is quantitatively supplied from the continuous feeder 4, and for transferring the to-be-processed object a to the second agitating / conveying means 10. A second stirring / conveying means 1 provided at the subsequent stage.
0, the receiving port 17 for the workpiece a, which is quantitatively supplied downward from the first stirring and conveying means 9, and the discharge conveyor 1
And a discharge port 19 for the object a to be processed 8.

Reference numeral 20 denotes a means for feeding the solidified material A to the transfer start end of the first stirring and conveying means 9, and 21 denotes a means for charging the solidified material B to the transfer start end of the second stirring and conveying means 10. , B, and a transfer means 23 such as a screw feeder is connected to the receiving hopper 22, and
And a solidified material charging port 23a is continuously provided.

The solidifying materials A and B are supplied to these charging means 20 and 21 by a fully empty leveler set in the solidifying material bin and based on a continuous measuring method using a screw feeder at the bottom of the bin. The amount of the solidified materials A and B to be supplied to the first and second stirring and conveying means 9 and 10 can be adjusted by inverter control, and the amount of the solidified materials can be adjusted by calibration. Is to be confirmed.

When the material to be treated a is acidic in nature, cement and lime are used as the solidifying materials A and B to neutralize the material. In the case of materials showing properties in the property area or those showing high alkali properties such as mud mixed with bentonite or cement, for example, the neutralization is attempted and the solidified treated soil (processed material) is backfilled, for example. In doing so, in order not to raise pollution issues,
As the solidifying material A, a neutral material (for example, Tiger Hard; trade name of Japan Resources Recycling Co., Ltd.) is used, and as the solidifying material B, a polymer-based material (for example, Sumiloc # 400; manufactured by Sumitomo Seika Co., Ltd.) (Product name).

However, this is merely an example. Contrary to the above, the solidified material B is placed on the transport start end side of the first stirring and transporting means 9 and the solidified material A is placed on the transport start end side of the second stirring and transporting means 10. To
Alternatively, the solidified material A (or B) having the same properties may be supplied to the first and second agitating / conveying means 10 at the transport start end side.

By the way, the hardening of the object to be processed a begins with the introduction of the solidified materials A and B, and the object to be processed a is solidified in a short time in a granular manner, and the transport resistance is increased.
In the present invention, the transport amount of the workpiece a can be adjusted by driving the agitating and transporting device 13 built in the first and second agitating and transporting means 9 and 10 by the hydraulic drive means 39 having a large torque. In this state, the object to be processed a can be quantitatively and continuously stirred and transported.

Reference numeral 24 denotes a self-propelled traveling body, which is the above-mentioned various means, ie, the supply means 1 for the workpiece a, the first and second stirring and conveying means 9 and 10, and the charging means for the solidified materials A and B. 2
0, 21, and furthermore, the conveyor 18 is mounted to increase the mobility when the processing site moves little by little or when the processing site changes, for example. You may make it operate deferred.

In the above-mentioned system, it is assumed that the material to be treated a shows a property of high alkali such as mud mixed with bentonite or cement. In this case, the material to be treated a is set to 5. The pH is adjusted to a neutral range of about 6 to 8.6, and the object a is transferred to the first stirring and conveying means 9.
And the neutralized solidified material A is supplied to the transport start end side of the workpiece a by the stirring and transporting means 9.

The workpiece a and the solidified material A supplied as described above are conveyed while being stirred by the stirring and conveying means 9, and the mixture is supplied to the second stirring and conveying means 10 through the discharge port 16. In addition, a neutral solidifying material B is supplied to the transfer start end side of the second stirring and conveying means 10, and the mixture of the object a and the solidifying material A and the solidified material B are supplied by the stirring and conveying means 10. Are conveyed while stirring, and are continuously taken out from the outlet 19 to the conveyor 18 as the solidified treated soil (processed material) b.

Here, the supply amount of the processing object a to the stirring and conveying means 9, the conveyance amount of the processing object a by the stirring and conveying means 9 and 10, and the input amounts of the solidified materials A and B are adjusted respectively. Because it is possible, the discharge port 1 of the second stirring and conveying means 10
Observing the treatment status of the initial solidified treated soil (processed material) b taken out from the sample No. 9 and increasing or decreasing the amount of the solidified materials A and B to be added to the object to be processed a based on the observation, the alkalinity is reduced. The to-be-processed object a having a high water content can be neutralized and solidified directly and continuously with high efficiency by using the minimum amount of the solidifying materials A and B economically without waste.

In this treatment process, there is no generation of other wastes (such as treated polluted water), and the treated material (solidified treated soil) b which has been solidified in this manner is regenerated even if it receives rainwater. It was confirmed that the treated material did not become muddy and further exhibited a strength of a cone index of 400 or more, and the effective use range of the treated material was greatly expanded.

As shown by the imaginary line in FIG.
May be supplied to the storage hopper 3 of the supply means 1 for the workpiece a, and the solidified material A may be supplied to the transport start end side of the first stirring and transporting means 9 through the storage hopper 3.

Further, as shown in FIG.
The inlets 23a for the solidified materials A and B by 21 are provided on the conveying start ends of the first and second stirring and conveying means 9 and 10 and in the middle of the conveying path so that the solidified materials A and B are dispersedly input. In this case, since the solidification of the workpiece a by the supply of the solidification materials A and B is sequentially performed, the conveyance resistance does not increase at once, and therefore, the first and second stirring conveyance means are provided. There is an advantage that the drive load on the components 9 and 10 is reduced, but at this time, only one of the input units 20 and 21 may be dispersed.

Further, in the system shown in FIGS. 1 and 4, the arrangement of the second stirring and conveying means 10 is omitted, that is,
It may be configured to achieve continuous granular solidification of the object to be processed a by only one stirring / conveying means 9.
The stirring / conveying means may be arranged in series at the subsequent stage of the second stirring / conveying means 10 (for example, three or four), so that the processing capacity of stirring / conveying may be increased. It is also possible to provide a means for feeding the solidified material at the transfer end side of the stirring and conveying means, and to supply the solidified material to the conveyance start end of the stirring and conveying means through the discharge port of the stirring and conveying means.

The system according to the above-described embodiment is of the type mounted on a vehicle body. However, it is also possible to implement the system by configuring the system to a stationary type. 5 and 6 are shown in FIGS.

In the system according to this embodiment, silos 25 to 27 of the solidified materials A to C are arranged on the upper side of the frame base 38, and the silos 25 to 27
A plurality of units (two units are shown) are provided below the supply unit 1 in a state in which the transfer of the object a is enabled. Are disposed in series, and further provided with a discharge conveyor 31 for solidified soil (processed material).

Then, the solidified material A is transferred to the stirring and conveying means 29, 3
Means 32, 33 for feeding the same in the middle of the transport path of 0;
Indirectly through the outlet 34 of the supply means 28
35 for injecting the solidified material C to the transport start end side of the stirring and transporting means 30 indirectly through the discharge port 36 of the stirring and transporting means 29 and the means 37 for injecting the solidified material C through the discharge port 36 of the stirring and transporting means 29. It has.

The system according to the above vertical arrangement is
Needless to say, it can be configured as a vehicle-mounted type, and can be implemented by omitting at least one of the means 32 and 33 for introducing the solidified material A into the conveying path of the stirring and conveying means 29 and 30. Of course there are
Further, it is also possible to omit and abbreviate the subsequent stirring and conveying means 30.

[0038]

As described above, according to the present invention, the object to be treated with high water content can be directly, continuously and efficiently granulated using the minimum necessary amount of solidifying material. And a continuous granular solidification system for the object to be processed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a continuous granular solidification system for an object mounted on a self-propelled traveling vehicle body.

FIG. 2 is a schematic longitudinal sectional side view of the continuous granular solidification system, omitting a self-propelled traveling vehicle body.

FIG. 3 is a cross-sectional view showing a supply means of a processing object.

FIG. 4 is a schematic configuration diagram of a system according to another embodiment.

FIG. 5 is a system configuration diagram of a stationary type in a form of a vertical arrangement.

FIG. 6 is a plan view of the system shown in FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Supply means of a to-be-processed object, 9 and 10 ... Means to stir and carry out a to-be-processed object, 20, 21 ... Means to inject solidified material, 24 ... Self-propelled traveling vehicle body, a ... C: Solidified material.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Haruo Umesaka 2-76-2 Tamachi, Shizuoka-shi, Shizuoka Pref.

Claims (4)

[Claims] 1. A solidification system for continuously granulating and solidifying an object to be treated with high water content such as muddy water or mud, and a supply means for the object to be treated capable of adjusting a supply amount, and an adjustment of a transfer amount. And a means for stirring and conveying at least one object to be processed, which continuously stirs and conveys the object to be processed, and a means for feeding a solidifying material for granulating and solidifying the object to be processed, which is stirred and conveyed. And the feed amount of the solidified material by the input means is configured to be adjustable, and the solidified material is supplied to the transport start end side of the processed material by the stirring and transporting means. Granular solidification system. 2. The continuous granular solidification system for an object to be processed according to claim 1, wherein the solidified material is also supplied to the middle of the path of the object to be processed by the stirring and conveying means. 3. The continuous granular solidification system for an object according to claim 1, wherein a neutral solidifying agent for neutralizing the object to be processed is used as the solidifying agent. 4. The continuous granular solidification system for an object according to claim 1, wherein the supply unit and the stirring and conveying unit for the object are mounted on a self-propelled traveling vehicle body.