JPH02203997A - Device for solidifying and kneading ooze - Google Patents

Abstract

PURPOSE:To greatly improve work efficiencies and make it possible to feed solidified ooze having approximately constant strength which is required according to changes in properties of the supplied ooze by providing an ooze feed unit, measuring unit, solidifying agent injection unit, and kneading unit to continuously solidify the ooze. CONSTITUTION:Ooze is placed in a hopper of an ooze feed unit 1 and when the ooze has a high water content, water contained is discharged through discharge pipes provided on the inclined walls of the hopper while the ooze is accumulated in the hopper so that the water content is reduced, and then the ooze is transported from the bottom of the hopper to a measuring unit 2, where weight and volume per unit time is measured, whereby bulk specific gravity (apparent specific gravity) of ooze to be kneaded and solidified or its water content at every moment is calculated based on the measurements. Then, the ooze is moved to a solidifying agent injection unit 3, where suitable quantity of solidifying agent corresponding to the bulk specific gravity or water content based on the measurement of the unit 2 is injected into the ooze and then the ooze is kneaded in a kneading unit 4, whereby the ooze in a required solidified state is discharged from an outlet 4a at the end.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, after dredging soft mud such as sludge deposited in water intakes of power plants, seabeds, lakes, rivers, nine ports, etc.
This relates to a solidifying and kneading device for soft mud used as a pretreatment for disposing of it in a landfill or the like.

[Conventional technology] In order to knead and solidify soft mud such as sludge that has traditionally been used in dredging operations, a certain amount of soft mud and a solidifying mold suitable for this amount are put into a tank, and the stirring function attached to the tank is turned on. They mixed it with a mixer they had, or they mixed it with a hardening agent and soft mud that had been raised on level ground or poured into a container, and then manually mixed it with a construction machine such as a backhoe.

[Problem to be solved by the invention] The above-mentioned cross-wires inside the tank and cross-wires due to the operation of construction machinery are all batch systems, and each operation such as mud feeding, solidification agent injection, cross-wires, and discharge is Because it is done intermittently,
Work efficiency is poor, and if the properties of the soft mud to be treated, such as the moisture content, change from moment to moment, it is difficult to respond quickly, and it is difficult to mix in the appropriate solidifying agent that matches the moisture content and specific gravity. There was a problem. In addition, in order to obtain solidified soft mud having the necessary strength, especially when treating soft mud with a high water content, it is necessary to mix a large amount of solidifying agent.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the soft mud solidifying and kneading device of the present invention is composed of a mud supply section, a measuring section, a solidification agent injection section, and a kneading section. A drain pipe is disposed approximately horizontally along the inclined surface of the hopper, and the measuring section includes a weight measuring section that measures the weight per unit time of the soft mud that is continuously transferred, and a weight measuring section that measures the weight per unit time of the soft mud that is continuously transferred. The solidifying agent injecting unit includes a volume measuring unit that measures the volume, and the solidifying agent injection unit is equipped with a syringe that can vary the injection amount of the solidifying agent according to the momentary specific gravity value of the soft mud obtained by the measuring unit.

[Function] The soft mud solidification and kneading device of the present invention is provided on the slope of the hopper after the soft mud is stored in the hopper of the mud supply section, and while the soft mud with a high moisture content is being accumulated in the hopper. When the water content is discharged from the drain pipe, l is the slurry supply section, 2 is the measurement section, 3 is the solidification agent injection section, and 4 is the kneading section, and these are arranged in a plane in this order. ing.

That is, a screw conveyor 1a having an inlet directly below the hopper 1 extends in the direction of the measuring section 2, and a screw rotating shaft is built in the screw conveyor la and supported by bearings 1b arranged at both ends. The soft mud is transferred by the rotation of the screw blades attached to it. ld is a reduction motor that drives the screw rotating shaft, and this power is transmitted by a chain wheel and a chain 7lc.

In addition, as shown in Fig. 2, the hopper 1 is provided with a substantially horizontal slit on the slope of the hopper so as to surround almost the entire circumference, and a pipe cut in half with a radius larger than the width of the slit is installed on the outside of the slit. Attach by welding.

The drain pipe 1e consisting of this half-split pipe is provided in multiple stages,
All of them protrude from one corner and are communicated with the collective drainage vlf. Therefore, the soft mud put into the hopper 1 is discharged from the bottom of the hopper 1 and transferred to the screw conveyor 1.
Before being transported by a, the water content is reduced while being discharged from the lower part of the hopper and transferred to the measuring section, where the weight and volume per unit time are measured, and based on these two pieces of information, the soft mud to be kneaded and solidified is The instantaneous bulk specific gravity (apparent specific gravity) or moisture content of is calculated. Then, the soft mud is transferred to the solidifying agent injection section, where an appropriate amount of solidifying agent is injected according to the bulk specific gravity or moisture content obtained from the information from the measuring section, and then mixed in the kneading section to achieve the desired solidification. The slurry is discharged from the slurry outlet at the end of the kneading section.

[Example] Hereinafter, the present invention will be described in detail using examples shown in the drawings.

Fig. 1 to Fig. 5 show one embodiment of the present invention, Fig. 1 shows the overall layout, Fig. 2 shows the hopper of the mud supply section, (a) is a side view, and (b) is a front view. , (c) is a plan view, (d) is a partially enlarged sectional view of the drain pipe, Fig. 3 is a side view of the weight measurement section, Fig. 4 is a partially sectional plan view of the solidifying agent injection section, and Fig. 5 is a cross-sectional view of the drain pipe. FIG.

Due to the weight of the soft mud deposited in the hopper, the moisture contained therein separates from the soft mud, descends the slope on the inside of the hopper, enters the slit, and is discharged to the outside via the drain pipe 1e and the collecting drain pipe 1f. be done. The above phenomenon occurs most notably in soft mud with a high moisture content.

The measuring section 2 is composed of a weight measuring section 2A and a volume measuring section 2B, and the weight measuring section 2A is a transport pipe with flexible pipes 2Aa made of an elastic material such as rubber attached to both ends, and is attached to a pedestal 2Ad as shown in FIG. It is suspended by a wire lobe that is fixed at two points via a suspended load cell 2Ab, and the weight of the transport pipe and the soft mud that is its contents is measured every moment. Then, this measured value is sent to the receiver 2A every moment.
c in the form of an electrical signal. In addition, the volume measurement unit 2B has a sensor 2Ba such as an electromagnetic flowmeter placed in the middle of the transport pipe,
Similarly, the measured values are sent as electrical signals to the receiver 2Bb. The weight signal per unit time (weight wave amount) that entered the receiver 2Ac and the volume signal per unit time (volume flow rate) that entered the receiver 2Bb are both calculated by the calculator 2C.
Then, the bulk specific gravity (apparent specific gravity) or water content of the soft mud flowing through the measuring section 2 is calculated.

Next, explaining the solidifying agent injection part 3, the solidifying agent injection part 3 consists of a transfer part (screw conveyor) 3A and an injection part (paddle) 3B, and the injection part 3B has a rotating shaft 3d as shown in FIG. At the same time, the soft mud is transferred by the rotation of a plurality of paddles 3e attached around the rotating shaft 3d, and solidified by the solidifying agent injector 3a through a solidifying agent supply channel that is bored and communicated inside the rotating shaft 3d and the paddles 3e. The agent is injected into the soft mud. The amount of solidifying agent supplied per hour is determined by a preset proportional setting device 3b according to the bulk specific gravity or water content calculated by the calculator 2C.
It is controlled based on instructions from

In the mixing section 4, a screw-type mixing machine is installed so that the solidifying agent is injected in the solidifying agent injection section 3 and the soft mud, which has been kneaded to some extent, is sufficiently uniformly kneaded.

The soft mud that has been kneaded is terminated as shown in FIG. 5. In the apparatus of the present invention, the soft mud can be solidified continuously, so that the working efficiency is greatly improved. Further, it is possible to automatically and immediately respond to changes in the properties of the supplied soft mud, that is, changes in bulk specific gravity and water content, and provide solidified soft mud having a required almost constant strength.

Furthermore, since dewatering is performed in the mud supply section, the amount of solidifying agent required can be reduced.

[Brief explanation of the drawing]

Figures 1 to 5 show a soft mud solidification and kneading device showing one embodiment of the present invention, in which Figure 1 shows the overall layout, Figure 2 shows the hopper of the mud supply section, and Figure 2 (a) is a side view, FIG. 2(b) is a front view, FIG. 2(e) is a plan view, FIG. 2(d) is a partially enlarged sectional view of the drain pipe, and FIG. 3 is a side view of the weight measurement unit. Fourth
The figure is a partially cutaway plan view of the solidifying agent injection part, and FIG. 5 is a cross-sectional view of the mud draining port at the end of the cross-conducting part. 1・・・・・・Mud supply section (Hora Nori, 1a...
...Screw conveyor, 1e...Drain pipe, if...Collective drain pipe, is discharged to the outside from the mud removal port 4a. 3C and 4b are bearings for a common rotating shaft that penetrates the solidifying agent injection part 3 and the crosstalk part 4, 4d is a reduction motor for driving the rotating shaft, and 4C is a chino that transmits this power. In addition, the first
The dotted lines in the figure indicate electrical wiring. By adopting the configuration described above, in the soft mud solidification kneading device of the present invention, the soft mud supplied to the mud supply section is continuously processed to have the required strength, and the solidified soft mud is suitable for the ground of the landfill site. At the same time, the properties of the soft mud supplied to the mud supply section change as the sampling location and sampling conditions change.
In particular, even if the bulk specific gravity or water content changes, the mixing ratio of the solidifying agent can be changed accordingly to supply solidified soft mud having a nearly constant strength. In addition, since the water content of soft mud with a high water content can be reduced in advance in the mud supply hopper, the amount of solidifying agent required to make solidified soft mud with the required strength can be reduced. It can be reduced. [Effects of the invention] 2...Measurement section, 2A...
・Weight measurement section, 2Ab...Load cell, 2Ac・
...Receiver, 2B...Volume measurement unit, 2Ba...Sensor (electromagnetic flowmeter), 2Bb...Receiver, 2C...Calculator, 3... ...Solidifying agent injection part, 3A...Transfer part (screw conveyor), 3B.
... Injection part (paddle), 3a ... Solidifying agent injector, 3b ... Proportional setting device, 4 ...... Kneading part, 4a.
...Sludge drainage port. Patent applicant: Ube Industries, Ltd.

Claims (1)

[Claims] (1) A soft mud solidification and kneading device, which includes a mud supply section, a measurement section,
The hopper is composed of a solidifying agent injection section and a kneading section, and a drainage pipe is arranged approximately horizontally along the slope of the hopper constituting the mud supply section, and the measurement section measures the unit time of soft mud that is continuously transferred. An injector consisting of a weight measuring section for measuring the weight per unit time and a volume measuring section for measuring the volume per unit time, and capable of varying the amount of solidifying agent injected according to the momentary specific gravity value of the soft mud obtained by the measuring section. A solidifying and kneading device for soft mud, characterized in that the solidifying agent injection part is provided with: