JP2005095800A - Mud water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mud water treatment apparatus which makes it possible to efficiently treat mud water produced upon pile driving on a construction site and, thereby, permits the reduction of a treatment cost. <P>SOLUTION: A rotating drum 3 which is rotatively driven by an oil hydraulic motor 4 is disposed on a car body 2 of a self-traveling vehicle 1 and spiral vanes 16, 17 are disposed on the outer side and the inner side of a screen 13 incorporated inside the rotating drum 3. A hopper 11 for supply is disposed on the opening 10 of the rotating drum 3. The mud water stored in a waste mud water storage tank and pH adjuster in an adjustor tank 18 mounted on the car body 2 are supplied into the screen 13 from the hopper 11 for supply and the pH of the mud water is made to be the extent of 5 - 7 by means of mixing and stirring of the spiral vanes 16, 17. At the same time, the mud water is separated into a water content, a fine particle solid content and a coarse particle solid content by using the screen 13, the water content and the fine particle solid content are sent into a turbid water tank 19 by means of a pump 22 disposed in the rotating drum 3, a coagulant is supplied into the turbid water tank 19 to perform solid-liquid separation, separated water over the muddy material deposited on the bottom plate of the turbid water tank 19 is drained and the muddy material is disposed of as it is. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention mainly relates to an apparatus for treating muddy water generated when a foundation pile is built.

  It is a common practice to drill a vertical hole in the ground with an earth drill or a boring machine and build a foundation pile into the vertical hole.

  When the foundation pile as described above is built, a large amount of muddy water is generated because the ground is excavated. This muddy water is normally once stored in a waste muddy water storage tank, taken out of the waste muddy water storage tank, and subjected to pH adjustment processing and volume reduction processing and discarded.

  By the way, when processing muddy water in the waste muddy water storage tank, conventionally, the muddy water in the waste muddy water storage tank is transported to a treatment plant of an industrial waste disposal contractor by a vacuum pump car, and pH adjustment processing and volume reduction are carried out at the treatment plant. However, there is a problem that the processing cost is high.

  An object of the present invention is to provide a muddy water treatment apparatus that can efficiently detoxify muddy water generated at the time of erection of foundation piles at a construction site and can greatly reduce the treatment cost. It is.

  In order to solve the above-mentioned problems, in the present invention, on the body of a self-propelled vehicle, a rotating drum whose rear end is opened, a motor for driving the rotating drum, and an adjusting agent in which a pH adjusting agent is stored A tank and a muddy water tank, a muddy water supply hopper and a coarse solids discharge chute are connected to the rear end opening of the rotating drum, and the pH adjuster in the adjuster tank is supplied to the hopper A pump for supplying the inside of the rotary drum is provided, and in the rotary drum, a cylinder that rotates integrally with the rotary drum and separates muddy water supplied from the hopper into the rotary drum into moisture and fine solids and coarse solids. A spiral blade is installed along the inner and outer peripheries of the screen, and moisture and fine solids accumulated in the bottom of the rotating drum through the screen are placed between the outer spiral blades in the muddy water tank. A structure in which a pump for feeding is incorporated, a flocculant supply means for supplying a polymer flocculant into the turbid water tank, a drainage means for separated water separated in the turbid water tank and a means for discharging mud Adopted.

  In the muddy water treatment apparatus having the above-described configuration, the muddy water in the waste muddy water storage tank is supplied from the supply hopper into the screen while the rotary drum is rotated in one direction, and the pH from the regulator tank to the muddy water. The adjusting agent is supplied to adjust the pH of the muddy water to about 5 to 7 by mixing and stirring by the rotation of the spiral blades, and the muddy water is separated into moisture and fine solids and coarse solids by the screen.

  Moisture and fine solids accumulated in the bottom of the rotating drum through the screen are supplied into the turbid water tank, and the polymer flocculant is supplied into the turbid water tank by the flocculant supply means to separate into solid and liquid. After draining the separated water on the mud that settles and deposits on the bottom of the tank, drain the mud from the muddy water tank by the drain, collect it on the spot, temporarily store it, and dry it. Dispose as general residual soil.

  On the other hand, the coarse solid content remaining in the screen is taken out into the discharge chute from the opening at the rear end of the rotating drum by the spiral blade in the screen rotating together with the rotating drum by reverse rotation of the rotating drum, Dispose of it.

  Here, any pH adjusting agent may be used as long as the pH of the muddy water is about 5 to 7, and examples of such a pH adjusting agent include dilute sulfuric acid.

  As described above, in the muddy water treatment apparatus according to the present invention, on a self-propelled vehicle, the muddy water pH adjustment treatment and the separation treatment of muddy matter and separated water after pH adjustment can be performed. The muddy water can be treated on site, and the treated mud can be disposed of as general residual soil. For this reason, it is not necessary to carry muddy water to an industrial waste treatment plant using a vacuum pump vehicle, and it is possible to eliminate the need for outsourcing work to a processing company, thereby greatly reducing muddy water treatment costs. .

  Moreover, by providing the spiral blade in the screen, the coarse solid content remaining in the screen by the reverse rotation of the rotary drum can be taken out to the discharge chute and discarded.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, on a vehicle body 2 of a self-propelled vehicle 1, a rotating drum 3 arranged in an inclined manner and a hydraulic motor 4 for driving the rotating drum 3 are mounted.

  The rotating drum 3 has a configuration in which conical cylindrical portions 3b and 3c are provided at the front and rear ends of the cylindrical portion 3a. A race ring 5 is provided on the outer periphery of the rear conical cylindrical portion 3c. Are supported by a plurality of rotatable guide rollers 7 supported by a support base 6.

  As shown in FIG. 2, the front conical cylinder portion 3 b has a closed end, and a shaft 8 provided at the closed end is rotatably supported by a bearing 9, and the hydraulic motor 4 is connected to the shaft 9. Yes.

  On the other hand, the rear conical cylinder portion 3c has an opening 10 at the rear end, and the lower end of the muddy water supply hopper 11 faces the opening 10 and the upper opening of the chute 12 for discharging coarse solid matter. I'm here.

  The discharge chute 12 is divided into an upper discharge chute 12a and a lower discharge chute 12b, and the upper discharge chute 12a is fixedly supported, while the lower discharge chute 12b has a lower end outlet of the upper discharge chute 12a. The position of the exit at the lower end can be changed on the horizontal plane so that it can be rotated around the center.

  A cylindrical screen 13 is provided concentrically with the rotating drum 3 inside the rotating drum 3. As shown in FIGS. 3 and 4, the screen 13 is provided with a plurality of bars 13a extending in the axial direction at intervals in the circumferential direction, and a wire 13b having a substantially triangular cross section is spiraled outside the bars 13a. It is configured such that a minute gap 15 is provided between the spiral portions of the wire 13b. In the embodiment, the size of the gap 15 is in the range of 0.5 to 1.0 mm.

  The screen 13 receives muddy water discharged from the lower end outlet of the supply hopper 11 and separates the muddy water into moisture and fine solids and coarse solids.

  The screen 13 is not limited to the one having the above-described structure, and may be any screen that can separate muddy water into moisture and fine solids and coarse solids.

  As shown in FIG. 2, the screen 13 is attached to the rotating drum 3 by a spiral blade 16 attached along the outer periphery thereof and rotates integrally with the rotating drum 3. A spiral blade 17 is attached to the inside of the screen 13 along its inner periphery. The inner spiral blade 17 has a spiral in the same direction as the spiral blade 16 provided outside the screen 13.

  A regulator tank 18 and a muddy water tank 19 are mounted on the vehicle body 2, and the regulator tank 18 is filled with a pH regulator that adjusts the pH of the muddy water to about 5-7. Here, dilute sulfuric acid is used as the pH adjuster.

  The pH adjusting agent in the adjusting agent tank 18 is fed into the supply pipe 21 by driving the pump 20, and is supplied into the supply hopper 11 from the discharge end 21 a of the supply pipe 21.

  In the rotating drum 3, a pump 22 is incorporated between the spiral blades 16 outside the screen 13 in the front conical cylinder portion 3b. The supply pipe 23 connected to the discharge port of the pump 22 passes through the screen 13 and is inserted into the inner spiral blade 17 and the outlet center of the supply hopper 11, and is drawn out from the supply hopper 11. The muddy water tank 19 is connected.

  The supply pipe 23 is divided into two parts, and the divided ends are connected via a rotary joint 24 arranged at the center of the outlet of the supply hopper 11 so that the pump 22 can freely rotate together with the rotary drum 3. ing.

  As shown in FIG. 5, the muddy water tank 19 is connected to a flocculant supply means 25 for supplying the flocculant therein. The flocculant supply means 25 is provided with a flocculant tank 26 filled with a water-soluble polymer flocculant on the upper side of the turbid water tank 19, and a pump 27 is provided in the polymer flocculant in the flocculant tank 26. The discharge port of the pump 27 and the inside of the muddy water tank 19 are connected by a pipe 28, and the polymer coagulant in the coagulant tank 26 is sent into the muddy water tank 19 by driving the pump 27.

  The muddy water tank 19 is supplied with water and fine solids that have passed through the screen 13 by driving a pump 22 incorporated in the rotary drum 3, and the water and fine solids are sent from the flocculant supply means 25. The polymer flocculant separates into a muddy solid (mud) and clarified water (separated water), the separated water is drained by the drainage means 30, and the solid is discharged to the outside by the discharge means 31.

  The drainage means 30 incorporates a pump 32 in the muddy water tank 19, connects a drain pipe 33 to the discharge port of the pump 32, and drains the separated water in the muddy water tank 19 from the drain pipe 33 by driving the pump 32. ing.

  The discharge means 31 connects a suction port of a pump 35 to a discharge port 34 provided in the lower part of the muddy water tank 19, connects a discharge pipe 36 to the discharge port of the pump 35, and mud is removed by driving the pump 35. It discharges from the discharge pipe 36.

  1 and 2, reference numeral 40 denotes a muddy water supply pipe for connecting a waste muddy water storage tank (not shown) to the supply hopper 11, and a pump (not shown) is connected to the muddy water supply pipe 40 to drive the pump. Thus, the muddy water in the waste muddy water storage tank is supplied into the supply hopper 11.

  In FIG. 1, reference numeral 42 denotes a generator which is a drive source for drive motors of various pumps.

  The muddy water treatment apparatus shown in the embodiment has the above-described structure. When the muddy water stored in the waste muddy water storage tank is processed, the rotating drum 3 is rotated in one direction by driving the hydraulic motor 4, and the waste muddy water storage tank. The muddy water is fed into the supply hopper 11 from the muddy water supply pipe 40, and the pH adjusting agent in the adjustment agent tank 18 is supplied from the supply pipe 21 into the supply hopper 11 by driving the pump 20 shown in FIG.

  The muddy water and the pH adjusting agent supplied into the supply hopper 11 are supplied into the screen 13 from the lower end outlet of the supply hopper 11, and are separated into moisture and fine solids and coarse solids by the screen 13. At the same time, the coarse solid content captured by the screen 13 is sent toward the closed end of the rotating drum 3 by the feeding action by the rotation of the spiral blade 17 attached inside the screen 13.

  Further, the muddy water and the pH adjusting agent are mixed and stirred by the rotation of the spiral blades 16 and 17 provided on the outside and inside of the screen 13 so that the pH is adjusted to about 5 to 7.

  The water and fine solids that have passed through the screen 13 are collected at the bottom of the rotary drum 3, and the water and fine solids are swirled in the water and fine solids that the pump 22 that rotates together with the rotary drum 3 stores at the bottom of the drum. At that time, it is sucked by the pump 22 and sent to the muddy water tank 19.

  A predetermined amount of muddy water and a pH adjusting agent are supplied into the rotary drum 3 to rotate the rotary drum 3 for a predetermined time, and after adjusting the pH of the muddy water by mixing and stirring by rotation of the stirring blades 16 and 17, the pump 22. The rotary drum 3 is stopped at a position where it is disposed at the bottom of the rotary drum 3, and the pump 22 is driven in the stopped state so that the water and fine solids that have passed through the screen 13 are continuously put into the muddy water tank 19. You may make it send.

  When moisture and fine solids are supplied into the turbid water tank 19, the polymer flocculant in the flocculant tank 26 is sent into the turbid water tank 19 by the operation of the flocculant supply means 25, and the polymer flocculant causes moisture to flow. The fine solid content is separated into solid and liquid, and a muddy substance is accumulated at the bottom of the turbid water tank 19, and the separated water is stored on the muddy substance.

  At this time, since the muddy substance and the separated water are pH adjusted in advance in the rotary drum 3, the separated water can be discharged into sewage and the like, and the muddy substance is handled in the same manner as general residual soil. can do.

  Therefore, when a predetermined amount of separated water is stored in the muddy water tank 19, the pump 32 of the drainage means 30 is driven to drain from the drain pipe 33.

  On the other hand, the mud is discharged from the discharge pipe 36 by driving the pump 35 of the discharge means 31, collected on the site, temporarily placed and dried, and then disposed of as general residual soil.

  Thus, in the muddy water treatment apparatus shown in the embodiment, since the muddy water pH adjustment process on the self-propelled vehicle 1 and the solid-liquid separation process can be performed after the adjustment, the foundation pile is built at the construction site. It is possible to treat muddy water that is sometimes generated, and to dispose of muddy matter and separated water after treatment.

  For this reason, it is not necessary to carry muddy water to a waste disposal site using a vacuum pump vehicle, and it is possible to dispense with a contractor to a processing company, so that processing costs can be greatly reduced.

  Further, the coarse solid content remaining in the screen 13 is also taken out from the opening 10 at the rear end of the rotating drum 3 into the discharge chute 12 by the rotating action of the inner spiral blade 17 by reversely rotating the rotating drum 3 and discarded. Can be processed.

  Further, by providing the spiral blades 16 and 17 on the outside and inside of the screen 13, the muddy water and the pH adjusting agent can be mixed and stirred, so that the muddy water can be subjected to a pH adjustment treatment very effectively. .

Front view showing an embodiment of a muddy water treatment apparatus according to the present invention Sectional drawing which shows the rotating drum part of FIG. Sectional view showing a part of the screen Sectional view along line IV-IV in FIG. Cross section showing muddy water tank

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-propelled vehicle 2 Car body 3 Rotating drum 4 Motor 10 Opening 11 Supply hopper 12 Discharge chute 13 Screens 16, 17 Spiral blade 18 Conditioner tank 19 Muddy water tank 20 Pump 22 Pump 25 Coagulant supply means 31 Discharge means

Claims (1)

  On the vehicle body of the self-propelled vehicle, a rotating drum whose rear end is opened, a motor for driving the rotating drum, an adjusting agent tank in which a pH adjusting agent is stored, and a muddy water tank are mounted. A muddy water supply hopper and a coarse solids discharge chute are connected to the rear end opening, and a pump for supplying the pH adjusting agent in the adjusting agent tank into the hopper is provided. Incorporates a cylindrical screen that rotates integrally with the rotating drum and separates the muddy water supplied from the hopper into the rotating drum into moisture and fine solids and coarse solids. A spiral blade is attached along the outer spiral blade, and a pump for supplying moisture and fine solids accumulated in the bottom of the rotating drum through the screen to the inside of the turbid water tank is incorporated between the outer spiral blades. And coagulant supply means for supplying Atsumarizai, mud processing apparatus provided with means for discharging waste water means and the slurry of separated water which is solid-liquid separated in turbid water tank.

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