JPH06201562A - Method and apparatus for processing particle system - Google Patents

Abstract

PURPOSE:To obtain the processing or measuring method and apparatus suitable for recycling of circulating muddy water for construction and stabilized muddy water, sedimentaion, dehydration, cleaning of general muddy water and muddy water, dehydration processing and water processing. CONSTITUTION:A vibrating piece 6 is arranged in the inside of a tank or a measuring apparatus in the stereoscopic pattern. The improvement of flow, the prevention of gelling flow-stop phenomenon and the removal of clogged material are performed. The measurement of specific gravity and the interface of sediment and valve control can be smoothed by this way. The valve having a bypass flow path prevents the deposition and clogging of mud, stabilizes the flow rate at a constant opening degree and improves the controllability. Dewatering and discharging of the separated sediment become easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to soil, residual soil, mud, sludge,
Classification, dehydration in the treatment of excavated soil, soil, water and sewage, contaminated soil, dredged soil such as rivers, ponds, water tanks, lakes and marshes, and drainage,
The present invention relates to a method and a device suitable for cleaning, purification, waste treatment or measurement.

[0002]

2. Description of the Related Art Conventionally, there has been no low-cost and simple treatment method for dehydrating or recycling a large amount of earth and sand discharged from excavation work and dredging work. Sedimentation from mud on-site during excavation work is mainly done by a sedimentation tank, and sometimes only a single-stage cyclone is used, and mud or stabilized mud that does not meet the drilling condition standards is discharged from the system and discarded. Had been prepared. Therefore, it caused a large amount of sludge and waste soil. For this treatment, conventional filtration and dehydration, wastewater treatment, and environmental purification require not only simple separation but also separate wastewater and exhaust treatment. Conventional dewatering equipment is expensive and expensive to process, so it is common to deposit large amounts of water-containing soil, sludge, etc. on bare soil for permeation and dehydration, or by incineration or cement hardening. there were. The former causes groundwater pollution and is not suitable for continuous mass treatment. The latter two have problems that they consume a lot of fuel and hinder the utilization of landfills. Also, it is difficult to separate impurities. As abandoned landfills have disappeared in recent years, sludge is dehydrated, dried, and then melted and solidified to be used as construction aggregates as a countermeasure, but drying and high temperature treatment consume a lot of energy, There is a drawback in that it is not economical. Many of the devices and processes conventionally used to solve these problems often use the filtration and dehydration equipment types and operating conditions used in the chemical industry as they are, are expensive, and require treatment. Even if the disposal cost of the processed material is not cheap, the equipment cost,
The difficulty was that power costs and operating costs were required. There were few attempts to reduce the total cost of the system including transportation. There is a method of using a dehydration sieve with a cyclone when excavating a ground with a large amount of sand in the treatment of drilling mud and stabilized mud, but the equipment is expensive and the effect is not stable. , Was difficult to use. In addition, there was no simple field device for measuring and controlling the specific gravity and interface of highly concentrated weak gel or thixotropic mud having various properties.

[0003]

When treating mud and muddy water, there are many cases in which the dehydration process is an obstacle in terms of cost. There was no case where the gelled construction sludge was recycled, so it was necessary to establish the method. As a result of research, it was found that there is much earth and sand that can be used for backfilling if these are separated and dehydrated, but in the past, centrifugation,
It was only possible to use expensive equipment such as a pressure filter, or to pile them up in the open field to permeate and dehydrate water on the ground. The latter cannot be used to prevent underground infiltration of sewage. In any case, a new solution as an environmental problem was needed. In the conventional device, it is common to process the difficult ones at once, and the cost is usually high.
It was necessary to improve the efficiency by a simple separation treatment without using expensive equipment and operation, and to easily dehydrate. If this becomes possible, purification work can be carried out at the same time, or in combination with conventional methods, it not only dehydrates and recycles the sediment with high efficiency and low power consumption, but also includes physicochemical and biochemical treatments. Conditions suitable for comprehensive treatment of soil and sludge can be obtained. A liquid cyclone can separate sediment from water or useful muddy water and concentrate it, but depending on the degree, the outlet easily clogs, the fluidity of the sediment in the sedimentation tank becomes poor, and the specific gravity of the mud and sediment and interface measurement It was difficult, therefore, it was not easy to take out the sediment layer and control the separation conditions based on this. A large margin is required to prevent the obstacle, and it is difficult to achieve separation or dehydration performance. This is the reason why it has not been used so much in the past. Conventionally, it has been difficult for the hydrocyclone to change the conditions of use because of the problem of blockage. A settling system and a cyclone system, which allow easy change of operating conditions, easy to change the installation position and use process, were necessary for improving efficiency and saving pump power. In addition, it was necessary to use the simple equipment to separate landfill waste, wash soil, and perform simple dehydration for landfill use and recovery of contaminated land. Dehydration by natural sedimentation is difficult due to gelation and interference sedimentation phenomenon in many cases. Filtration and dewatering by filtration have a blockage problem, and the separation particle size is determined by the filtration, so the processing capacity is small and the conditions cannot be changed during operation. In order to eliminate these difficulties, efficient equipment, parts, measuring methods and dehydration technology were needed.

[0004]

[Means for solving the problem] As a result of research on improvement of processing conditions, equipment, particle flow conditions, measurement of specific gravity and control, take a technical standpoint to facilitate process control for separating fine particles from coarse particles. I found that could solve the problem. One of the reasons why it was difficult to treat mud in the past is separation of mud used for excavation, sand in stabilized mud, and silt,
It was often due to irregular concentration fluctuations. On the other hand, the normal liquid cyclone has a large amount of residual sediment and silt on the refined mud side, even if sediment is separated at low concentration, but at high concentration at the entrance.
It was also found that it hinders the removal of fine particles that hinders recycling or dehydration. It was also found that the decrease in separation performance leads to an increase in the ratio of fine particles mixed in with coarse particles, resulting in a decrease in the rate of dehydration of earth and sand. The present invention therefore passes through a settling tank or cyclone in two or more stages at high inlet concentrations,
Operation is controlled automatically or manually by outlet specific gravity or slurry or sediment accumulation level. At this time, depending on the conditions of the slurry, irrespective of before and after the separation operation, even if it is a high-concentration slurry, the thixotropic flow is secured by continuously or occasionally applying a vibration force to the minimum required range of mud or slurry. The oscillator can be arranged three-dimensionally in the muddy water or slurry layer to ensure fluidity, and is necessary. One stage of the separation operation may be a combination of one or more cyclones and a settling tank. It is advantageous from the viewpoint of energy saving to use a cyclone with a relatively small diameter in order to control the clay and silt contents and maintain the specific gravity at a predetermined value. It is advantageous to use when necessary or to use a large number of small and small-sized cyclones, but the specific gravity, which was previously difficult,
By measuring the interface etc., the equipment cost can be kept within a reasonable range, and the power cost can be relatively low.

[0005]

EXAMPLE 1 FIG. 1 shows a horizontal settling tank apparatus according to the present invention. Both the separated muddy water and the settled slurry can be re-separated and re-concentrated by cyclone. The stabilized mud in the earth drill method contains bentonite fine particles, CMC which is a viscous component, etc., but can be easily measured and treated like other mud and sludge by using carbon dioxide gas blowing together if necessary. In FIG. 1, muddy water or earth and sand that retains fluidity with water is supplied onto a vibrating screen strainer 2, and pebbles and foreign matters are separated into a tank 1. The inside of the tank is separated into an upper mud layer 7 and a sediment slurry, and an interface 9 between them is detected and indicated by a float 12 attached with an indicator 15. The float 12 is linked with an arbitrary valve or damper 13 by the connecting rod 11 to adjust the interface level. The relatively thin mud that has passed a predetermined settling time enters the tank 5 from the overflow weir 3 and is blown into the liquid cyclone 27 by the pump 21, and the fine particles or bentonite mud enters from 28 to another storage tank. Muddy water or slurry rich in sand, silt enters from 29 into the sediment separation compartment or tank 5. The vibrator 20 accelerates the flow and vibrates surrounding the vibrator 6, the specific gravity, and the interface measuring float 32, which are three-dimensionally arranged inside the tank in order to increase the fluidity of the coagulable substance, or a vibration arranged near the vibrator. The child 16 is driven. A vibrating element may be provided in the float 12 or the valve 13. FIG. 2 is a side view cross section of FIG. The valve 13 can be arbitrarily selected from a cylinder, a sphere, a prism, a curved body, a plate, etc., but the inventor's Japanese Patent Application SEP-7
A valve device with a bypass flow passage for blocking prevention, etc. (filed in Japanese Patent Application No. 4/12/18) is suitable.

[0006]

[Embodiment 2] FIG. 3 shows a specific gravity measuring device suitable for measuring, treating, and transmitting muddy water or slurry having poor fluidity, or an apparatus suitable for a vertical type sedimentation device capable of increasing the size.
While taking out the sediment from the valve 4, an overflow is also used to form a float balance specific gravity meter. The whole may be measured by a weight scale, or both may be used together to output a measurement or control signal.

[0007]

[Third Embodiment] FIG. 4 shows a three-dimensional vibrator 16 that surrounds a float 32 whose specific gravity is adjusted, a flexible wire, a chain, a spring, etc. 34 that suspends the float, its end 35 and a tightening fitting 36, a limit switch 37, and a weight. 37 is a specific gravity and interface measuring mechanism including a position detector 37 such as a spring 39, a differential transformer, a transmitter, and a fulcrum 41. When the float floats, the spring 39 works to detect the displacement by the operating transformer, and the interface position or the specific gravity can be indicated by another indicator. Such a mechanism and structure can be applied to the first and second embodiments.

[0008]

[Fourth Embodiment] FIG. 5 shows a mechanism of the first embodiment, which is of a weighing type, and operates a valve 13. The valve can be a cone type, a spherical type or any other type. As a normal valve, it is suitable to use a butterfly valve with a short-circuit passage as shown in FIGS.

[0009]

Fifth Embodiment FIG. 6 shows an apparatus suitable for measuring the specific gravity of a slurry. The stirring mechanism prevents coarse particles from settling and separating, and vibration or stirring can be stopped during measurement. When used for continuous measurement, if necessary, muddy water or slurry is supplied from the upper or lower part of the device by passing through the vibrating screen 2 and overflowed from the overflow pipe 3.

[00010]

Sixth Embodiment FIGS. 7 and 8 show a valve body of a butterfly valve with short-circuit passages 51 and 52. The feature is that the structure is simplified by not completely closing it like a conventional valve, the accumulation and blocking of soil and clay, etc. can be prevented, and the control is stable. By providing the oscillator near the valve, the effect of preventing blockage is enhanced, and blockage can be eliminated. Therefore the shut-off valve,
There is an advantage that a damper and the like can be provided in series.
The arrangement and size of the short-circuit flow passages differ depending on the target fluid and the size of the valve, but they can be generalized on the condition that each flow passage is not blocked by the test and no blind spot is created.

[00011]

INDUSTRIAL APPLICABILITY The present invention relates to a treatment method, a measuring method, an apparatus and a device suitable for separating or purifying muddy water, sewage, sludge, soil, earth and sand, and other liquids. It is possible to separate water, suspended water, sewage, suspended sediment of sludge and the like from the accumulated sediment, mud, sludge, and foreign matters while preventing clogging by a sedimentation tank, a cyclone, a stationary tank or the like. Slurry measurement and control, which were difficult in the past, were made possible. It is easy to combine and use with other methods, which is convenient for solving environmental problems and for industrial use.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a device for selecting and purifying sediment or muddy water or stabilized muddy water.

2 is a side cross-sectional explanatory view of FIG.

FIG. 3 is a cross-sectional explanatory view of a specific gravity measuring device or a sedimentation device.

FIG. 4 is an explanatory diagram of a three-dimensional oscillator, a float, and a detection mechanism.

FIG. 5 is a side cross-sectional explanatory view of a valve control mechanism.

FIG. 6 is a sectional explanatory view of a specific gravity measuring device or a sedimentation device.

FIG. 7 is a plan view of a butterfly valve body and a frame for mounting by inserting into a flange.

FIG. 8 is an explanatory cross-sectional view of a specific gravity measuring device or a bottom valve of a sedimentation device.

[Explanation of symbols]

 1 settling tank 2 vibrating screen strainer 3 overflow weir 4 mud or slurry outlet 6 three-dimensional oscillator 12 interface detection float 13, 33 valve, 18 support spring 20, 22 vibration mechanism 27 cyclone 32 float 37 weight 40 differential transformer Displacement detectors such as 41 Fixed fulcrums 51, 52 Bypass passages

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // C02F 11/12 ZAB Z 7824-4D

Claims (7)

[Claims] 1. A method of treating a particle-liquid system in which a vibrator is three-dimensionally arranged inside a tank containing a mud water or a mud particle-liquid system, and vibration is applied to separate or measure. 2. A muddy water or mud particle-a particle in which a vibrator is three-dimensionally arranged in the vicinity of a float inside a liquid system tank or container, and the specific gravity or interface is measured by vibrating the vibrator continuously or intermittently-
Liquid measurement method. 3. The measuring device according to claim 2, comprising a tank or a container, a vibrator arranged inside, a float or a weighing mechanism, and a valve at the bottom. 4. The measuring device according to claim 3, comprising a tank or a container, a vibrator disposed inside, a float or a weighing mechanism, a stirring mechanism, and a valve at the bottom. 5. A float suspended from a rod or a flexible linear object or a spring when measuring an interface between a particle and a liquid in a tank or a measuring container, a mechanism for detecting a force applied to the float and a vibration mechanism. And a particle-liquid system measuring method. 6. A butterfly valve for muddy water, slurry or powder, comprising a plurality of flow passages or notches arranged at required valve bodies. 7. A muddy water or slurry settling tank, a cyclone, or a measuring device control valve, which is provided with a plurality of flow passage holes, slits or notches arranged at required positions of a valve body or an outlet.