JP3728647B2 - Muddy water continuous treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a muddy water continuous treatment suitable for treating muddy water used to stabilize surrounding ground, for example, when building underground continuous walls, cast-in-place concrete piles, shield tunnels, and the like. Science Is related to the position.
[0002]
[Prior art]
In general, when constructing underground underground walls, cast-in-place concrete piles, shield tunnels, etc., the above-mentioned grooves are used so that the walls of natural ground such as grooves and holes excavated in the ground do not collapse until the concrete placement is completed. A muddy water method is often used in which muddy water (stabilizing liquid) is injected into a hole or the like.
The muddy water used in such a muddy construction method is bentonite, CMC (polymer material), chemicals such as dispersants, and weighting materials (mainly soil), etc., depending on the soil quality of the surrounding ground and the type of machine used for excavation And water are mixed in a predetermined composition.
[0003]
By the way, since the muddy water after use becomes industrial waste, it is necessary to perform predetermined treatment. This muddy water treatment is performed in, for example, a muddy water treatment facility 1 as shown in FIG. 6, and the muddy water sent from the groove or hole 2 excavated in the ground to the waste muddy water tank 3 is stored in the chemical mixing tank 4 as a flocculant. An inorganic flocculant and a polymer flocculant fed from the chemical tank 5 are added and mixed. Thereafter, in the reaction mud storage tank 6 and the concentration sedimentation tank 7, the reaction of the various coagulants is promoted, and the mud containing the stable liquid component in the mud is coagulated and precipitated, and the mud and water are separated. The Then, the mud is sent to a dehydrator such as a filter press 9 through a mud storage tank 8, and finally dehydrated and agglomerated, and the separated solid (mud cake) is carried out and discarded as industrial waste. It is like that. On the other hand, the water separated from the muddy water is neutralized and oxidized in the neutralization tank 10 and the oxidation flocculation tank 11 to adjust the pH, and then sand-filtered by the sand filter 12 to obtain a predetermined water quality. After being purified, it is drained.
As described above, in the muddy water treatment facility 1, the mud content is separated and aggregated from the used muddy water to reduce the volume, and the muddy water is purified.
[0004]
[Problems to be solved by the invention]
However, the conventional muddy water treatment method and apparatus as described above have the following problems.
First, since such a muddy water treatment facility 1 is large, if the construction site is small, the installation space may not be secured and the muddy water treatment facility 1 may not be provided. Moreover, since the treatment process of the muddy water treatment facility 1 is very complicated, it takes time to treat the muddy water, which hinders shortening the construction period.
Furthermore, the current situation is that the mud is heterogeneous and the concentration of the stabilizing liquid component varies from place to place. However, in the muddy water treatment facility 1, since the muddy water is processed while being sequentially sent by a pump, a portion having a high concentration and a portion having a thin concentration of chemicals are generated during the processing, and in a thick portion, an increase in cost is caused by the addition of extra chemicals. However, the problem that the agglomeration / separation process of the mud cannot be sufficiently performed occurs in the thin part, and the management of the amount of the drug added is very difficult.
[0005]
In order to solve the above-described problems, the present applicant has already proposed a technique shown in Japanese Patent Application No. 8-238238. In this technology, a predetermined amount of muddy water is put into a treatment tank, and the flocculant is added, stirred, and a lump of mud is generated in this treatment tank. It is the composition to do.
[0006]
However, such a technique has a compact configuration and is advantageous particularly in a small-scale site, but conversely, in a large-scale site, there is a case where the treatment capacity of muddy water is insufficient.
[0007]
Therefore, a technique capable of continuously treating muddy water is required in order to increase the muddy water treatment capacity. As one of such techniques, it is conceivable to sequentially add the flocculant, stir, and generate the mud mass in the pipe while passing the mud water through the pipe.
This method is effective depending on the type of mud, but in the case of a stable liquid using bentonite, polymer, etc., in the mud treatment process, for example, the mud is coagulated with a flocculant, and the mud and water In order to ensure separation, it is necessary to secure a predetermined time for each. However, in the treatment method configured to pass through the pipe, it is practically difficult to individually secure the time required for each step in the mud aggregation step and the mud and moisture separation step. .
[0008]
The present invention has been made in consideration of the above points, and has a high processing capacity in terms of both quantity and quality, saves space, and maximizes the use of coagulant coins. Continuous muddy water treatment that can reduce costs Science It is an object to provide a device.
[0013]
[Means for Solving the Problems]
Claim 1 In the invention according to the present invention, the first agent for aggregating the mud by separating the muddy water into mud and water is added to the used mud used to maintain the stability of the excavation work. The muddy water and the first drug are stirred and mixed by the first stirring means, and the muddy water in which the first drug is mixed in the first drug mixing unit, In the second drug mixing unit, a second drug for further promoting aggregation is added, and the muddy water and the second drug are stirred and mixed by the second stirring means. The mud water mixed with the second chemical is stirred by a third stirring means, and a mud agglomeration generating part for generating a lump that aggregates the mud is generated in the mud agglomeration generating part. And a dehydration part for further dewatering the lump of mud, and from the primary drug mixing part It has become the secondary drug-mixing unit the mud content aggregation generation unit via a configuration in which the mud is continuously processed It is a muddy water continuous treatment device, wherein the first chemical mixing unit has a first tank into which the used muddy water is fed, and a predetermined dimension from the bottom of the first tank to the inside of the first tank. The second drug mixing unit and the mud aggregation generating unit are configured to include a second channel through which the mud flows from the introduction channel. The tank is formed by being partitioned by another partition disposed with a gap of a predetermined dimension from the bottom surface of the second tank, and the partition is provided so as to protrude from the inner surface of the first tank. Is provided so as to protrude from the inner surface of the second tank. It is characterized by that.
[0014]
As a result, the first drug is added and stirred and mixed in the primary drug mixing unit, the second drug is added and stirred and mixed in the secondary drug mixing unit, and the mud content is generated in the mud aggregation generation unit. By forming an agglomerated mass and further dehydrating it in the dewatering section, the used muddy water can be treated.
[0018]
Also The muddy water sent to the primary drug mixing section of the first tank flows into the secondary drug mixing section of the second tank via the introduction path, and further flows to the muddy water agglomeration generation section communicating with this. Na R The muddy water treatment path from the primary drug mixing section to the secondary drug mixing section and the mud aggregation generating section to the discharge section, that is, the “flow” of mud water can be made continuous. Moreover, the primary medicine mixing part and the introduction path are formed by dividing the first tank by a partition, and the secondary medicine mixing part and the mud aggregation unit are formed by dividing the second tank by another partition. By forming these, the entire apparatus can be made compact.
[0020]
further Since the partition and the other partition are provided so as to protrude from the inner surface of the first tank and the second tank, the muddy water stirred in the primary drug mixing section and the mud aggregation generating section It will be further disturbed by the partition.
[0024]
Claim 2 The invention according to A first chemical for separating the mud into mud and water and aggregating the mud is added to the used mud used to maintain the stability of the excavation work. Further agglomeration of the mud is further promoted in the first drug mixing part in which the drug is stirred and mixed by the first stirring means, and in the mud water in which the first drug is mixed in the first drug mixing part. A second medicine for adding the second medicine, and the second medicine in the second medicine mixing section in which the muddy water and the second medicine are stirred and mixed by the second stirring means. The mud aggregate produced by the agglomeration of the mud is produced by stirring the mud mixed with the third agitation means, and the mud produced by the mud agglomeration production unit. A dehydrating part that is further dehydrated, and the secondary drug mixing unit from the primary drug mixing unit To the mud content aggregation generation unit through, and has a configuration in which the mud is continuously processed A muddy water continuous treatment device, The primary drug mixing part is disposed in the first tank into which the used muddy water is sent and inside the first tank with a gap of a predetermined dimension from the bottom surface of the first tank. An inlet passage formed by a partition, and the second chemical mixing section and the mud aggregation production section are connected to the second tank into which the mud flows from the introduction path. Formed by being separated by other partitions arranged with a gap of a predetermined dimension from the bottom surface of One or both of the partition and the other partition are provided so as to be movable up and down.
[0025]
Thereby, the capacity | capacitance of any one or both of a primary chemical | medical agent mixing part and a mud | floc fraction aggregation production | generation part can be changed.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the muddy water continuous treatment according to the present invention. Science First to third embodiments will be described with reference to FIGS.
[0029]
[First embodiment]
As shown in FIG. 1 and FIG. 2, a muddy water continuous treatment facility (muddy water continuous treatment device) 20 is schematically configured by a coagulation treatment unit 21 and a dehydration unit 22.
The agglomeration processing unit 21 has a configuration in which a medicine mixing tank (first tank) 23 and a flock generation tank (second tank) 24 having a rectangular shape in plan view are adjacent to each other with a partition wall 25 interposed therebetween, and are integrally provided. It has become.
[0030]
In the medicine mixing tank 23, a partition plate (partition) 26 having a substantially L shape in plan view is integrally attached to a corner adjacent to the floc generating tank 24 on the inner peripheral surface thereof. Due to the partition plate 26, the inside of the drug mixing tank 23 is substantially L-shaped in a plan view with a part cut away, and an overflow portion (introduction path) surrounded by the partition plate 26. ) And S2.
[0031]
The partition plate 26 is provided such that a lower end portion thereof is positioned above the bottom surface 23a of the drug mixing tank 23 by a predetermined dimension, whereby the primary drug mixing unit S1 and the overflow unit S2 are mixed with each other. The tank 23 communicates with each other at the bottom.
[0032]
Used mud water is sent to the first medicine mixing unit S1 by a mud pump 27, and a medicine (first medicine) A is supplied by a metering pump 28. In addition, a stirrer (first stirring means) 29 having a screw 29a is provided in the primary drug mixing section S1, and is supplied by the muddy water fed by the mud pump 27 and the metering pump 28. The drug A is stirred and mixed in the primary drug mixing section S1. At this time, the wing shape of the screw 29a is set so that mud flows from the upper side to the lower side in the primary drug mixing part S1 by the stirring.
[0033]
In the overflow part S2, a notch is formed in the partition wall 25, thereby forming an overflow port 30 that is lower than the outer peripheral part of the partition plate 26 and the medicine mixing tank 23 by a predetermined dimension. The muddy water that has passed through the overflow portion S <b> 2 overflows from the overflow port 30 and flows into the floc generating tank 24.
[0034]
On the other hand, the floc generating tank 24 is provided with a partition plate 31 having a substantially L shape in plan view at a position corresponding to the overflow port 30. By this partition plate 31, the inside of the flock generation tank 24 is surrounded by the secondary drug mixing unit S3 surrounded by the partition plate 31, and a floc generation unit in which a part thereof is cut out to form a substantially L shape in plan view. (Mudden Aggregation Generation Unit) S4. The partition plate 31 is provided such that the lower end portion thereof is positioned above the bottom surface 24a of the flock generation tank 24 by a predetermined dimension, whereby the secondary drug mixing unit S3 and the flock generation unit S4 generate flocks. The bottom of the tank 24 is configured to communicate with each other.
[0035]
A medicine (second medicine) B is supplied by the metering pump 32 into the secondary medicine mixing section S3. Furthermore, in this secondary medicine mixing part S3, a stirrer (second stirring means) 33 provided with a screw 33a is provided, and the medicine B is stirred and mixed in the muddy water. In the screw 33a, the blade shape is set so that the muddy water in the secondary drug mixing unit S3 is sent from the upper side to the lower side.
[0036]
Further, in the flock generation unit S4, a stirrer (third stirring means) 34 provided with a screw 34a is provided. By stirring the muddy water separated into water and mud by the chemicals A and B, mud is separated. A flock F that is a lump of minutes is generated. In the screw 34a, the blade shape is, for example, a flat plate type so that the generation of the floc F can be efficiently performed, and the muddy water in the flock generation unit S4 is set to be sent upward from below.
[0037]
Further, the flock generation unit S4 is provided with a discharge port (discharge unit) 35 in the upper portion of the side wall of the flock generation tank 24 so that the generated flock F and separated water are discharged from the outside of the tank. It has become.
[0038]
Further, a discharge chute (a floc augmenting portion, a chute) 36 that is continuous with the discharge port 35 is provided adjacent to the flock generation tank 24.
The discharge chute 36 is formed of a cylindrical body extending downward, and plates 37 protruding in the horizontal direction are provided alternately on the left and right sides. When the floc F falls in the discharge chute 36, it hits these plates 37, so that the floc F is further compacted.
[0039]
As the dewatering unit 22 provided on the subsequent process side of the agglomeration processing unit 21 as described above, if the floc F discharged from the discharge chute 36 is coarse, a belt press, screw press, centrifuge ( In the case where the particle size of the floc F is adjusted by the particle size adjusting tank 41 or the like to make it homogeneous, the dehydrator such as a filter press or a continuous centrifuge There are 42.
[0040]
Next, a muddy water continuous treatment method in the muddy water continuous treatment facility 20 having the above-described configuration will be described.
[0041]
(Primary drug mixing process)
For this, first, the used mud water is sent from the upper side to the primary drug mixing section S1 of the drug mixing tank 23 by the mud pump 27.
[0042]
In the inflow portion of the muddy water, the medicine A is added at a predetermined constant ratio with respect to the muddy water inflow amount by the metering pump 28.
The drug A used at this time is for separating and agglomerating the mud containing the stable liquid component in the mud water. For example, polyaluminum chloride, ferric chloride, slaked lime, natural organic high Those including molecular flocculants are preferred. Needless to say, the amount added is determined according to the properties of the muddy water to be treated.
[0043]
In this way, the muddy water and the drug A sent to the primary drug mixing unit S1 are stirred and mixed by the screw 29a of the stirrer 29, and the mud particles in the muddy water and the drug A come into uniform contact with each other. Separation / aggregation reaction occurs. At this time, since the fluidity (viscosity) of the mud increases due to the agglomeration reaction of the mud, it is desirable to employ a stirrer 29 having a large power (torque). The stirring by the stirrer 29 is preferably rapid stirring (depending on the blade shape of the screw 29a, but in the case of a general propeller type, for example, 300 to 500 rpm).
[0044]
At this time, the muddy water and the drug A are continuously fed from the upper side to the lower side by the screw 29a while being stirred in the primary drug mixing unit S1.
Then, the volume of the primary drug mixing unit S1 is set so that the mixing time of the muddy water and the drug A in the primary drug mixing unit S1 can be ensured, for example, 30 seconds or more (preferably 60 to 90 seconds or more). It is set with respect to the amount of muddy water supplied by the pump 27.
[0045]
Thus, the muddy water in which the drug A is added and mixed in the primary drug mixing section S1 flows into the lower part of the overflow section S2 from the gap below the partition plate 26 by the flow generated by the screw 29a. Then, since the muddy water is continuously fed sequentially from the primary drug mixing section S1, the muddy water is sequentially pushed up in the overflow section S2, and from the overflow port 30 to the secondary drug mixing section S3 of the flock generation tank 24. Inflow.
[0046]
(Secondary drug mixing process)
To the muddy water that has flowed into the secondary drug mixing unit S3, the drug B is added by the metering pump 32 at a predetermined constant ratio with respect to the muddy water flow rate.
Agents B used at this time include, for example, synthetic organic polymer flocculants, polyacrylamide, and the like, and calcium chloride that promotes aggregation when natural organic polymer flocculants are used as the primary agent. The amount of addition is determined according to the properties of the mud to be treated.
[0047]
Thus, the muddy water and the medicine B sent to the secondary medicine mixing unit S2 are stirred and mixed by the screw 33a of the stirrer 33, and the generation of the floc F is started. The stirring by the stirrer 33 at this time may be a short time (for example, 10 seconds or less) as long as the muddy water and the drug B are mixed uniformly, and the volume of the secondary drug mixing unit S2 is fed accordingly. It is set with respect to the amount of mud supplied from the mud pump 27.
In the secondary drug mixing section S2, the muddy water is continuously mixed from the drug B as described above, and continuously moves from the upper side to the lower side by the flow generated by the screw 33a. It is fed into the lower part of the flock generating part S4 from the gap below the plate 31.
[0048]
(Mud aggregation process)
In the floc generator S4, the muddy water sent to the lower part thereof is stirred by the screw 34a of the stirrer 34, thereby promoting the agglomeration reaction between the mud in the mud and the drugs A and B, and the floc F grows gradually. And separate the water.
[0049]
At this time, the rotational speed of the screw 34a is set to about 10 to 100 rpm, for example, and the muddy water is slowly stirred, and the aggregate of the mud particles gradually grows with stirring, and the floc F is about several mm to several tens mm. To be.
[0050]
By the way, although the production | generation of this floc F changes with the shape and rotational speed of the screw 34a, when the stirring speed is high, the floc F produced | generated will become small, and when the stirring is inadequate, the production | generation of floc F (mud content) Since the separation of the particle aggregate size and water becomes insufficient, the shape and rotational speed of the screw 34a are determined in accordance with the properties of the muddy water to be treated.
[0051]
Further, the muddy water is continuously pushed upward from below while being stirred in the flock generation unit S4 by the screw 34a, and the stirring time in the flock generation unit S4 is, for example, about 30 seconds to 5 minutes (preferably The volume of the flock generation unit S4 is set with respect to the amount of muddy water supplied from the mud pump 27 so as to be about 1 to 3 minutes.
[0052]
In this way, the muddy water is pushed up while being stirred in the flock generating unit S4, and the flock F is generated from the muddy water and the water is separated. The water separated from the flock F is separated from the discharge port 35. It flows out of the generation tank 24 and flows into the discharge chute 36.
[0053]
In the discharge chute 36, the floc F and water naturally fall and hit the plate 37 in the middle thereof, so that the floc F is compacted and the dropping speed is not excessive.
[0054]
(Dehydration process)
The flock F and water discharged from the discharge chute 36 are fed into the dewatering unit 22, passed through a dehydrator 40 such as a belt press, a screw press, and a centrifuge, and a particle size adjustment tank 41, a filter press and a continuous centrifuge. In the dehydrator 42 such as a separator, the floc F is separated into water and water contained in the floc F is further dehydrated to produce a dehydrated cake. The dewatered cake is discharged from the discharge ports of the dehydrators 40 and 42, and the separated water is discharged from the drain port.
[0055]
(Post-process)
The dewatered cake produced | generated by processing the used muddy water by the muddy water continuous processing equipment 20 as mentioned above is discarded as a waste material.
On the other hand, the separated water is returned to the agglomeration processing unit 21 or drained after performing drainage treatment as necessary.
[0056]
In the muddy water continuous treatment method and the muddy water continuous treatment equipment 20 described above, in the first chemical mixing step, used muddy water is sent to the first chemical mixing unit S1, and the muddy water is separated and aggregated therein. In the secondary drug mixing step, the muddy water that has flowed into the secondary drug mixing part S3 from the overflow part S2 is sent to the overflow part S2. The chemical B is added to the slag and sent downward while being stirred by the stirrer 33 and sent to the lower part of the floc generating unit S4. In the mud aggregation process, the mud water to which the chemicals A and B are added is stirred by the stirrer 34. The floc F is gradually generated by being sent upward, and the water separated from the generated flock F is discharged from the discharge port 35 to the discharge chute 36.
[0057]
In this way, the agglomeration processing unit 21 of the muddy water continuous treatment facility 20 can treat muddy water by separating the muddy content and water in the muddy water and generating the flock F. At this time, the muddy water is processed in the aggregation processing unit 21 while being continuously sent from the primary drug mixing unit S1 to the floc generating unit S4 via the overflow unit S2 and the secondary drug mixing unit S3. Therefore, it is possible to exhibit a very high processing capacity as compared with the conventional batch type and the like, and it can be used effectively even on a large-scale site.
[0058]
In addition, in each of the primary drug mixing unit S1, the secondary drug mixing unit S3, and the flock generation unit S4, mixing with the drugs A and B or generation of the flock F is gradually performed while the muddy water moves in one direction. Therefore, at the time of exiting the primary drug mixing unit S1, the secondary drug mixing unit S3, and the flock generating unit S4, the respective processes are surely completed, and therefore, the qualitatively high process is performed and the flock is performed. The volume of F can be reduced.
[0059]
In addition, in the primary drug mixing unit S1, the secondary drug mixing unit S3, and the flock generation unit S4, the volume of the portion for storing the muddy water is individually set with respect to the amount of mud fed by the mud pump 27. It has a configuration. Thereby, the time required for the muddy water to pass through the primary drug mixing unit S1, the secondary drug mixing unit S3, and the flock generation unit S4 can be individually set. Therefore, it is possible to secure the time required for the drug mixing and the flock generation, and the muddy water can be reliably treated.
[0060]
Furthermore, the overflow part S2 and the secondary medicine mixing part S3 are partly divided into a part of the medicine mixing tank 23 and the floc generating tank 24 for constituting the primary medicine mixing part S1 and the flock generating part S4. It is formed by partitioning with. Thereby, the aggregation processing unit 21 can be configured to be very compact.
[0061]
In addition, the movement of muddy water from the primary drug mixing part S1 through the overflow part S2, the secondary drug mixing part S3 to the flock generation part S4 and the dehydration part 22 passes under the overflow or the partition plates 26 and 31. Therefore, a pump or the like is unnecessary, and the configuration of the aggregation processing unit 21 can be made very simple and troubles are hardly caused. In addition, the muddy water continuous treatment facility having such a configuration can be manufactured by reusing a conventional treatment apparatus, for example, for sludge treatment.
[0062]
Moreover, since the partition plates 26 and 31 are provided so as to protrude from the inner surfaces of the drug mixing tank 23 and the flock generation tank 24, the flow of muddy water stirred in the primary drug mixing section S1 and the flock generation section S4 Furthermore, it is disturbed and it becomes possible to perform a muddy water treatment efficiently by stirring efficiently.
[0063]
Further, the discharge port 35 of the flock generating unit S4 is provided with a discharge chute 36 on which the flock F naturally falls, and a plate 37 protruding substantially horizontally is provided on the inner surface thereof. Thereby, since the floc F falling in the discharge chute 36 hits the plate 37 and is compacted, the volume of the floc F can be reduced. Further, since the falling speed of the floc F can be suppressed to prevent the floc F from being broken, the processing quality can be further enhanced in this respect.
[0064]
In the first embodiment, the partition plates 26 and 31 are provided. However, one or both of the partition plates 26 and 31 may be moved up and down. This makes it possible to easily change the substantial volumes of the primary drug mixing unit S1 and the flock generation unit S4, and appropriately adjust the drug mixing time, flock generation time, etc. according to the properties of the muddy water to be processed. The mud water continuous treatment facility 20 can be made more versatile. Of course, the partition plates 26 and 31 may be configured to automatically move up and down, and if the cost is emphasized, the function can be sufficiently achieved as a configuration in which the plate is manually moved up and down.
[0065]
Moreover, in said 1st embodiment, the specific numerical example was given about stirring time, stirring speed, etc. in each part of primary medicine mixing part S1, secondary medicine mixing part S3, and flock production | generation part S4. However, it is of course not limited to this, and may be appropriately determined according to the properties of the muddy water to be treated, the desired treatment capacity, and the like.
Similarly, the number of agitators 29, 33, and 34, the number of screws 29a, 33a, and 34a, the blade shape, and the like may be set as appropriate so that drug mixing and floc generation can be performed satisfactorily.
[0066]
Moreover, although it was set as the structure provided with the discharge chute 36 as a floc reinforcement | strengthening part, this does not need to be provided depending on the production | generation situation of a flock, and even when provided, the structure is what of any structures other than the said discharge chute 36. It may be used.
[0067]
Furthermore, although it was set as the structure which accommodated the primary chemical | medical agent mixing part S1 and the overflow part S2 integrally in the chemical | medical agent mixing tank 23, it replaces with this, for example, the muddy water which mixed the chemical | medical agent A in the primary chemical | medical agent mixing part S1 is used. The configuration of each part of the muddy water continuous treatment facility 20, such as the configuration for sending to the secondary drug mixing unit S <b> 3 by a pipe or the like, is not intended to be limited to the above, and may be changed without departing from the spirit of the present invention. Is possible.
[0068]
In addition, the drugs A and B used are not intended to be limited to those listed above.
[0069]
Other than this, as long as it does not deviate from the gist of the present invention, any configuration may be adopted, and it is needless to say that the above-described configurations may be appropriately combined.
[0070]
[Second Embodiment]
Next, the muddy water continuous treatment according to the present invention. Science As a second embodiment of the apparatus, an example in which a dehydrator is integrally provided will be described. Note that, in the following description, the same reference numerals are given to configurations common to the first embodiment, and description thereof is omitted.
[0071]
As shown in FIG. 3, the muddy water continuous treatment facility (muddy water continuous treatment device) 20 ′ includes an agglomeration process including a primary drug mixing unit S 1, an overflow unit S 2, a secondary drug mixing unit S 3, and a flock generation unit S 4. The unit 21 and the dehydrating unit 22 ′ are configured.
[0072]
The aggregation processing unit 21 is configured as shown in the first embodiment, and the aggregation processing unit 21 is installed in the upper stage of the frame 50.
[0073]
The dehydrating unit 22 ′ has a configuration in which a screw press (dehydrator) 51 is provided at the lower stage of the frame 50. The flock F is directly fed into the screw press 51 from the discharge chute 36 of the agglomeration processing unit 21. In the dewatering unit 22 ′, the flock F dewatered by the press screw 53 that is rotationally driven by the drive source 52 is discharged as a dewatered cake F ′ from the discharge port 54, and the separated water is separated into a lower separated water tank. It can be stored in 55.
[0074]
In addition, what is shown in FIG. 4 shows experimental data when muddy water is processed by the above-mentioned process.
[0075]
In the muddy water continuous treatment facility 20 ′ described above, the aggregation treatment unit 21 including the primary drug mixing unit S1, the overflow unit S2, the secondary drug mixing unit S3, and the flock generation unit S4 is discharged from the discharge chute 36. It has the structure arrange | positioned above the spin-drying | dehydration part 22 'which consists of the screw press 51 which spin-dry | dehydrates the flock F. FIG. Thereby, compared with the case where dehydration part 22 'is installed in another place, an installation can be made very compact.
[0076]
In the second embodiment, the screw press 51 is used as the dehydrator. Of course, another type of dehydrator may be used instead.
[0077]
[Third embodiment]
Next, the muddy water continuous treatment according to the present invention. Science A third embodiment of the apparatus will be described. Here, an example in the case of reusing treated muddy water as a stabilizing liquid will be described. In the following description, the same reference numerals are given to configurations common to the first or second embodiment, and the description thereof is omitted.
[0078]
When the muddy water is reused, the techniques described in Japanese Patent Application Nos. 8-238238 and 8-238239 already filed by the present applicant are used.
That is, in the muddy water continuous treatment equipment 20, 20 ′ (see FIGS. 1 to 3) shown in the first or second embodiment, as the medicine A added in the primary medicine mixing unit S1, for example, “Reheidi L (Product name: manufactured by Kunimine Industries Co., Ltd.), and as a drug B added in the secondary drug mixing unit S3, for example, inorganic salts such as calcium chloride or “Reheidi B (product name: manufactured by Kunimine Industries Co., Ltd.)” Is used.
[0079]
And in order to reproduce | regenerate the dehydrated cake F 'obtained by processing a muddy water through the said 1st chemical | medical agent mixing process, a secondary chemical | medical agent mixing process, a flock production | generation process, and a dehydration process, the following regeneration processes I do.
[0080]
As shown in FIG. 5, a predetermined amount of fresh water (water) is put in a primary agitation tank (liquid production tank) 60, and the dehydrated cake F ′ produced by the treatment as described above is charged therein, and this dehydration is performed. A regenerating agent (third agent) C (for example, an inorganic carbonate such as soda ash or “Reheidi C (product name: manufactured by Kunimine Kogyo Co., Ltd.)” for redispersing cake F ′ in a muddy water state is added.
[0081]
Then, the fresh water, the dehydrated cake F ′, and the regenerant C are stirred with the stirring pump 61 provided in the primary stirring tank 60 and then fed into the secondary stirring tank 63 with the pump 62.
[0082]
In the secondary agitation tank 63, the fresh water, the dewatered cake F ′, and the regenerant C are agitated for a predetermined time by the agitator 65, and further, if necessary, when the predetermined management standard as the stabilizing liquid is not satisfied. Adjusts the components of muddy water by replenishing various stabilizing liquid materials (medicines) and the like.
[0083]
After that, the muddy water regenerated in this manner is stored from the secondary agitation tank 63 into the stable liquid tank 66, and this muddy water is filled in the excavation groove or the like, so that the ground stability during the construction can be achieved.
[0084]
In the muddy water continuous treatment method described above, the dewatered cake F ′ treated and discharged by the muddy water continuous treatment equipment 20, 20 ′ is put into the primary stirring tank 60, and the regenerant C and water for dissolving the dehydrated cake F ′ are used. Is provided with a muddy water regeneration step for regenerating muddy water by stirring and mixing.
In this way, the dewatered cake F ′ obtained by separating and agglomerating the mud from the used mud is reused to recycle the mud, which is then discarded at other sites. Resources can be used effectively. As a result, it is possible to reduce the amount of waste and to reduce the total muddy water treatment / manufacturing cost and to establish a very excellent muddy water treatment / reuse system.
[0085]
In the third embodiment, in order to reuse muddy water, specific drug names are given as examples of the drugs A, B, and C. Of course, as long as they have the same utility, they are appropriately used. Other drugs may be used.
[0086]
Further, the muddy water continuous treatment equipment 20, 20 ′ and the muddy water continuous treatment method mentioned in the first to third embodiments have no problem even if they are appropriately changed without departing from the gist of the present invention. .
[0087]
Furthermore, the application of the present invention may be in any case such as continuous wall construction, cast-in-place pile construction, and the like.
Moreover, what is necessary is just to determine suitably the reproduction | regeneration or disposal of the processed muddy water according to the property of the muddy water which should be processed.
[0088]
Other than this, as long as it does not deviate from the gist of the present invention, any configuration may be adopted, and it is needless to say that the above-described configurations may be appropriately combined.
[0092]
【The invention's effect】
Claim 1 or 2 According to the muddy water continuous processing apparatus according to the present invention, the first chemical for separating the muddy water into mud and water and aggregating the mud is added to the used muddy water. And a second drug for further promoting the aggregation of the mud in the first drug mixing part that is stirred and mixed by the first stirring means, and the muddy water in which the first drug is mixed in the first drug mixing part. The second drug mixing part in which the muddy water and the second drug are stirred and mixed by the second stirring means, and the muddy water in which the second drug is mixed in the second drug mixing part. And a mud agglomeration generating part for producing a mass in which mud is agglomerated by stirring with a third agitation means, and the mud content from the primary drug mixing part to the secondary drug mixing part. The muddy water is continuously processed to the agglomeration unit.
[0093]
As a result, the first drug is added and stirred and mixed in the primary drug mixing unit, and the second drug is added and stirred and mixed in the secondary drug mixing unit, and the mud content is generated in the mud coagulation generation unit. The used muddy water can be treated by forming a mass in which the particles are aggregated.
Moreover, since the muddy water is continuously processed from the primary drug mixing section through the secondary drug mixing section to the mud agglomeration generating section, the muddy water is compared with the conventional batch type etc. The processing capacity is extremely high, making it suitable for large-scale sites. At the same time, in each of the primary drug mixing unit, the secondary drug mixing unit, and the mud agglomeration generating unit, each process can be reliably performed, and a process excellent in quality can be performed.
[0095]
Also, Claim 1 or 2 According to the muddy water continuous treatment apparatus according to the present invention, the primary drug mixing unit is configured to include the first tank and the introduction path formed by the partition inside the first tank, and the secondary drug mixing unit. The part and the mud agglomeration production part are configured to be separated by another partition arranged in the second tank.
[0096]
Thereby, the muddy water sent to the primary drug mixing part of the first tank flows into the secondary drug mixing part of the second tank through the introduction path, and further flows to the muddy water agglomeration generating part communicating therewith. It will be. In this way, the muddy water treatment path from the primary drug mixing section to the secondary drug mixing section, the mud coagulation production section, and the discharge section, that is, the “flow” of the muddy water should be continuous. In Wear .
[0097]
Moreover, the primary medicine mixing part and the introduction path are formed by dividing the first tank by a partition, and the secondary medicine mixing part and the mud aggregation unit are formed by dividing the second tank by another partition. By forming these, the entire apparatus can be made compact.
In addition, the apparatus having such a configuration can be realized only by providing a stirring means such as a screw in the tank, and further by performing piping for adding a drug, etc., and the apparatus has a very simple configuration, so that the cost is low. You can make this device.
[0098]
further, Claim 1 According to the muddy water continuous processing apparatus according to the present invention, the partition is provided so as to protrude from the inner surface of the first tank, and the other partition is provided so as to protrude from the inner surface of the second tank.
Thus, since the partition and the other partition are provided so as to protrude on the inner surface of the first tank and the second tank, the muddy water stirred in the primary drug mixing unit and the mud aggregation generation unit is It is further disturbed by the partition and other partitions, and the muddy water treatment is made better.
[0100]
on the other hand, Claim 2 According to the muddy water continuous processing apparatus according to the present invention, either one or both of the partition and the other partition are configured to be movable up and down. Thereby, the capacity | capacitance of either one or both of a 1st tank or a 2nd tank can be changed easily, and mixing and stirring of a chemical | medical agent and a lump of mud according to the property etc. of the muddy water which should be processed. The processing time in each part, such as the generation of, can be changed as appropriate, and the apparatus can be made versatile.
[Brief description of the drawings]
FIG. 1 A continuous muddy water treatment according to the present invention. Science FIG. 2 is an elevational configuration diagram showing a first embodiment of the apparatus.
FIG. 2 is a plan view of the apparatus.
FIG. 3 A muddy water continuous treatment according to the present invention. Science It is an elevation surface configuration diagram showing a second embodiment of the device.
FIG. 4 is a diagram showing data when processing is actually performed in the apparatus.
FIG. 5: A muddy water continuous treatment according to the present invention. Science It is a block diagram which shows 3rd embodiment of a device.
FIG. 6 is a block diagram showing an example of a conventional muddy water continuous treatment method and apparatus.
[Explanation of symbols]
20, 20 'Muddy water continuous treatment equipment (Muddy water continuous treatment equipment)
22 Dehydration part
23 Drug mixing tank (first tank)
24 Flock production tank (second tank)
26 Partition plate (partition)
29 Stirrer (first stirring means)
33 Stirrer (second stirring means)
34 Stirrer (third stirring means)
35 Discharge port (discharge section)
36 Discharge chute (Flock augmentation part, chute)
37 plates
60 Primary agitation tank (Liquid preparation tank)
A drug (first drug)
B drug (second drug)
C Regenerative agent (third drug)
F floc
S1 Primary drug mixing part
S2 Overflow section (introduction route)
S3 Secondary drug mixing part
S4 Flock generator (mud aggregation generator)

Claims (2)

A first agent for separating the muddy water into mud and water and aggregating the mud is added to the used mud used to maintain the stability of the excavation work. A primary drug mixing part in which the drug is stirred and mixed by the first stirring means;
A second chemical for further promoting the aggregation of the mud is added to the mud mixed with the first chemical in the primary chemical mixing part, and the mud and the second chemical are secondly mixed. A secondary drug mixing part that is stirred and mixed by the stirring means of
A mud agglomeration generating unit for producing a lump in which the mud is agglomerated by stirring the mud mixed with the second chemical in the second chemical mixing unit with a third stirring means;
And a dewatering unit for further dewatering the mud mass produced in the mud aggregation production unit,
A muddy water continuous treatment apparatus configured to continuously process the muddy water from the primary drug mixing unit to the mud aggregation production unit through the second drug mixing unit ,
The primary drug mixing part is disposed in the first tank into which the used muddy water is sent and inside the first tank with a gap of a predetermined dimension from the bottom surface of the first tank. And an introduction path formed by a partition,
The secondary drug mixing unit and the mud aggregation production unit are disposed in a second tank into which the mud flows from the introduction path with a gap of a predetermined dimension from the bottom surface of the second tank. It is formed by being separated by a partition,
The muddy water continuous processing apparatus , wherein the partition is provided so as to protrude from an inner surface of the first tank, and the other partition is provided so as to protrude from an inner surface of the second tank . A first agent for separating the muddy water into mud and water and aggregating the mud is added to the used mud used to maintain the stability of the excavation work. A primary drug mixing part in which the drug is stirred and mixed by the first stirring means;
A second chemical for further promoting the aggregation of the mud is added to the mud mixed with the first chemical in the primary chemical mixing part, and the mud and the second chemical are secondly mixed. A secondary drug mixing part that is stirred and mixed by the stirring means of
A mud agglomeration generating unit for producing a lump in which the mud is agglomerated by stirring the mud mixed with the second chemical in the second chemical mixing unit with a third stirring means;
And a dewatering unit for further dewatering the mud mass produced in the mud aggregation production unit,
A muddy water continuous treatment apparatus configured to continuously process the muddy water from the primary drug mixing unit to the mud aggregation production unit through the second drug mixing unit ,
The primary drug mixing part is disposed in the first tank into which the used muddy water is sent and inside the first tank with a gap of a predetermined dimension from the bottom surface of the first tank. And an introduction path formed by a partition,
The secondary drug mixing unit and the mud aggregation production unit are disposed in a second tank into which the mud flows from the introduction path with a gap of a predetermined dimension from the bottom surface of the second tank. It is formed by being separated by a partition,
One or both of the partition and the other partition are provided so as to be movable up and down.

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