JP2011083734A - Dewatering apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dewatering apparatus which can discharge a separated solid quickly at low cost and a low labor. <P>SOLUTION: The dewatering apparatus 10 comprises: a rotary tank 1 which is a tank for receiving a slurry S, an object for solid-liquid separation, and carrying out the solid-liquid separation by rotation; a sending pipe 2 for sending the slurry S to the rotary tank 1; a water storage tank 3 installed closely to the inner wall of the rotary tank 1 and having a water-permeation structure 4 in the side facing to a rotating rotary shaft; a filtration means 5 so installed at a position as to carry out solid-liquid separation filtration in the rotary shaft side of the water storage tank 3; and a rotating mechanism for rotating the rotary tank 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dehydrating apparatus, and in particular, dehydration of aggregates that have a large amount of water by crushed stone, washing, etc., and separation work of other solid-liquid mixtures, especially for discharging separated solids at low cost, low labor and The present invention relates to a dehydrating apparatus that can be processed quickly.

  Generally, cement concrete, asphalt mixture, secondary products such as U-shaped grooves, road aggregates, etc. are used for construction and civil engineering, and standards for other components are permitted. There is a unity of standards that are not done. For example, it is divided into standards such as 20 mm, 25 mm, 40 to 0 mm, fine sand (mountain sand, river sand, crusher run) and the like, and various kinds of aggregates are supplied depending on the application. Here, each aggregate is subjected to processing such as size equalization and removal of mud, and shipped as an aggregate product.

  Each aggregate is standardized for removing mud by water washing, but a large amount of water is required for washing, and a large amount of polluted water is generated. In order to deal with this, a dehydrating apparatus by centrifugation has been conventionally provided. However, in order to increase the processing capacity, an increase in the size of the dewatering cylinder is inevitable. Therefore, the applicant of the present application has previously disclosed an invention shown in Patent Document 1 to solve such a problem.

  In other words, as a rapid dehydration device for aggregates that can quickly dehydrate aggregates that have a large amount of moisture due to crushed stone, washing, etc. Provided with a discharge opening on the large-diameter end side and a shaft-attaching wall on the small-diameter end side, and rotating blades projecting inwardly on the inner surface of the water-permeable peripheral wall and arranged on the horizontal axis In addition, a radial drive mechanism that can rotate in one circumferential direction is provided, and a thrust drive mechanism that can reciprocate in the axial direction is provided, and a slurry guide tube that introduces slurry near the shaft-attached wall portion through the discharge opening This is a proposed configuration.

Japanese Unexamined Patent Publication No. 2004-225279 “Aggregate Rapid Dehydration Device and Aggregate Rapid Dehydration Method Using the Same”

  However, the conventional dehydrator has a common problem. That is, it is difficult to efficiently discharge the solid after dehydration, that is, solid-liquid separation. In addition, it is a difficult point of the conventional dehydrating apparatus that the apparatus needs to be enlarged in order to increase the processing capacity. The above problem is the same in the disclosure of Patent Document 1 described above.

  Therefore, the problem to be solved by the present invention is to provide a dehydrating apparatus that can quickly process the discharge of separated solids at low cost, with low labor, except for the problems of the prior art. Furthermore, the subject of this invention is providing the spin-drying | dehydration apparatus which can improve a processing capability, without enlarging an apparatus.

  As a result of studying the above problems, the present inventor has conceived that the problems can be solved by using a filtering means and an endless belt for solid-liquid separation, and the present invention has been achieved. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

(1) A rotating tank that is a tank in which solid-liquid separation processing is performed by receiving and rotating a slurry to be subjected to a solid-liquid separation process, a feed pipe for feeding the slurry into the rotating tank, and an inner wall of the rotating tank And a water storage tank provided with a water-permeable structure on the side facing the rotation axis of the rotation, and a filter provided so as to perform a solid-liquid separation action on the rotation axis side of the water storage tank. A dehydrating apparatus comprising another means and a rotation drive mechanism for rotating the rotating tub.
(2) The dehydrating apparatus according to (1), wherein the filtering means includes an endless belt-like filter cloth and an endless belt driving mechanism that rotationally drives the endless belt-like filter cloth.
(3) The dewatering device according to (2), wherein the endless belt-shaped filter cloth is provided so as to circulate around the water storage tank.

(4) The feed pipe is provided on a rotating shaft of the rotary tank, and two or more sets of the water storage tank and the filtering means are provided, (2) or The dehydrating apparatus according to (3).
(5) The water storage tank is provided with a drain pipe for discharging water passing through the filtering means and the water permeable structure to the outside of the apparatus. (2) to (4) The dehydration apparatus according to any one of the above.
(6) The dehydrator according to any one of (2) to (5), wherein a part of the endless belt-shaped filter cloth is provided outside the rotating tank.
(7) The dehydrating apparatus according to any one of (2) to (6), wherein the rotating tank and the endless belt-like filter cloth are located in a housing.

  Since the dehydrating apparatus of the present invention is configured as described above, according to this, the discharge of the separated solid can be processed at low cost, low labor, and quickly. Furthermore, according to the present invention, a large amount of slurry can be processed without enlarging the apparatus, and the processing capacity can be considerably increased by increasing the rotation of the apparatus without increasing the size of the apparatus itself. The possible processing capacity is a level that exceeds the aggregate cleaning level and can also be used for processing necessary in the event of a disaster such as a sediment disaster.

It is sectional drawing which shows the basic composition of this invention dehydration apparatus. It is sectional drawing explaining the effect | action in the spin-drying | dehydration apparatus of FIG. 1A. It is sectional drawing which shows the structural example of this invention dehydration apparatus. It is sectional drawing which shows another structural example of this invention dehydration apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1A is a cross-sectional view showing the basic configuration of the dehydrator of the present invention. Also,
FIG. 1B is a cross-sectional view for explaining the operation of the dehydrator of FIG. 1A. As shown in these figures, the dehydrating apparatus 10 receives a slurry (slurry flow: S. Hereinafter, the slurry itself is referred to as S) to be subjected to solid-liquid separation processing, and the solid-liquid separation processing is performed by rotation. Rotating tank 1, a feeding pipe 2 for feeding the slurry S into the rotating tank 1, and a water storage system provided with a water permeable structure 4 on the side facing the rotation axis of rotation provided near the inner wall of the rotating tank 1. A tank 3, a filtering means 5 provided so as to perform a solid-liquid filtering action on the rotating shaft side of the water storage tank 3, and a rotation drive mechanism (not shown) for rotating the rotating tank 1; The main structure is composed of

  With such a configuration, in the dehydrating apparatus 10, the slurry S to be subjected to the solid-liquid separation process is introduced into the rotary tank 1 through the inlet pipe 2. The rotary tank 1 is rotated by a rotation drive mechanism, and the introduced slurry S moves in the centrifugal direction, that is, toward the inner wall side of the rotary tank 1 due to the centrifugal force generated by the rotation of the rotary tank 1. Further, due to the speed of rotation, even if the outlet of the inlet pipe 2 is below the rotary tank 1 as shown in the figure, the slurry S is rolled up and moved toward the inner wall of the rotary tank 1. Moving.

  The slurry S first collides with the filtering means 5 and the solid-liquid filtering action of the filtering means 5 causes the solid M and water W constituting the slurry S to fall on the surface of the filtering means 5. The rest, the latter, travels further through this. The water W that has passed through the filtering means 5 further passes through the water permeable structure 4 and moves to the water storage tank 3 that is provided outside the water permeable structure 4 and is stored therein.

  In addition, the component of this invention shown by each figure including the water-permeable structure 4 is not limited to the form shown by each figure. The form shown in each figure is merely an example. The same applies to the following.

  Further, the water permeable structure 4 is provided so as to cover the entire inner surface of the water storage tank 3, and the surface of the water storage tank 3 is open so that the water permeated by the water permeable structure 4 can be received by the entire surface. You can also. Even in this case, it is possible to at least temporarily prevent water from falling from the inside of the water storage tank 3 to the inside when the rotating tub 1 is appropriately rotated. And by setting it as the structure which provided the drainage pipe mentioned later, the water once received in the water storage tank 3 can be discharged | emitted out of this apparatus 10, and a continuous process can be performed.

  The configuration of the water storage tank 3 and the water permeable structure 4 is not limited to this, and a part of the inner surface of the water storage tank 3 is opened so that a certain amount of water can be stored even when the rotation of the rotary tank 1 stops. A structure may be used. Of course, in that case, it is not necessary to cover the entire surface of the water-permeable structure 4.

  As shown in the figure, the feeding pipe 2 of the present apparatus 10 is provided on the rotating shaft of the rotating tank 1, and two or more sets of the water storage tank 3 and the filtering means 5 are provided. it can. In order to increase the effect of efficiently separating the introduced slurry S into solid and liquid using the rotation of the rotary tank 1, and in order to continue smooth rotation without fluctuation, the feed pipe 2 as the slurry S introduction path Is preferably provided on the rotating shaft.

  Further, in order to increase the effect of efficiently separating the introduced slurry S into solid and liquid using the rotation of the rotary tank 1, in order to continue smooth rotation without fluctuation, the water storage tank 3 and the filtering means 5 are used. It is desirable to provide two or more sets. In this case, it is needless to say that it is more desirable to provide it so as to be symmetric with respect to the rotation axis. Each cross-sectional view shows an example in which at least two sets are provided, but three sets or four sets or more are within the scope of the present invention. By increasing the number of sets, the processing capacity can be increased. However, even with only two sets, the effect of the present invention can be sufficiently exerted, and a considerable amount of processing capacity can be obtained.

  As shown in the figure, the filter separating means 5 is composed of an endless belt-like filter cloth 6 and an endless belt drive mechanism (not shown) for driving the endless belt-like filter cloth 6 to rotate. Can be configured to be provided so as to circulate around the water storage tank 3. As illustrated, a part of the endless belt-like filter cloth 6, particularly a part on the back side (outside) of the water storage tank 3, may be provided outside the rotating tank 1.

  With this configuration, the slurry S leaves the solid M on the endless belt-like filter cloth 6, and the water W passes through the water-permeable structure 4 and moves to the water storage tank 3, while the solid M on the endless belt-like filter cloth 6. Is rotated so as to circulate around the water storage tank 3 while adhering to and mounting on the endless belt-like filter cloth 6 by the endless belt driving mechanism. Since the endless belt-like filter cloth 6 comes out of the rotary tank 1 on the back side (outside) of the water storage tank 3, at this stage, the solid M attached and placed on the filter cloth 6 is left to fall naturally. It is possible to remove them by force or to remove them forcibly by appropriate means.

  Thereby, the solid M separated by the filtering means 5 provided with the endless belt-like filter cloth 6 can be easily discharged out of the apparatus 10, and the solid-liquid separation function is lowered by the adhesion and loading of the solid M. The filtered separating means 5 is in a state in which its function is restored, and returns to the rotary tank 1 again by the rotation of the endless belt-like filter cloth 6 by the endless belt drive mechanism, and is used for solid-liquid separation of the slurry S. Can be done.

  FIG. 2 is a cross-sectional view showing a configuration example of the dehydrating apparatus of the present invention. As shown in the figure, the apparatus 210 is provided with a drain pipe 27 in the water storage tank 23 for discharging the water passing through the filtering means 25 and the water permeable structure 24 to the outside of the apparatus 210 in addition to the configuration described with reference to FIG. 1A and the like. Can be configured.

  As described above with reference to FIG. 1B, the water W separated from the slurry S continuously enters the water storage tank 3. The water W is pressed against the inner wall side by centrifugal force when the rotating tank 1 is rotating, but the water W still moves to the water storage tank 3 and needs to be discharged. It is. As shown in FIG. 2, the form / structure is provided with an appropriate drain pipe 27, so that water received by the water storage tank 23 can be discharged out of the water storage tank 23.

  In addition, what is necessary is just to make it finally discharge | emit or collect | recover the downstream side of the drainage pipe 27 via the drainage relay part 28 provided coaxially with the rotation tank 21, for example.

  In addition, the entire dehydration apparatus described above can be accommodated in a predetermined housing to form an actual apparatus, which can be transported, installed or permanently installed in an aggregate cleaning or other use site.

  FIG. 3 is a cross-sectional view showing another configuration example of the dehydrating apparatus of the present invention. As shown in the figure, the dehydrating apparatus of this example can be configured to include an idler A and a rotating roller C that can freely rotate in addition to the above-described components. These are arranged such that the endless belt-like filter cloth 36 is sandwiched between the idler A and the rotating roller C.

  With such a configuration, the endless belt-shaped filter cloth 36 and the solid (slurry, mud) on the endless belt-shaped filter cloth 36 are forcibly dehydrated when passing between the idler A and the rotating roller C, and the endless belt-shaped filter cloth 36 and the solid cloth In either case, the water content is reduced. Thereby, the peelability of the solid from the filter cloth 36 is enhanced, and the efficiency of discharging the solid to the outside of the device 310 can be increased. Further, the effect of recovering the filter separation function of the endless belt-like filter cloth 36 whose solid-liquid separation function is reduced due to the adhesion and loading of the solid can be enhanced.

  As the idler A and the rotating roller C, a water-absorbing sponge-like material can be used, but specific specifications and designs such as materials, characteristics, and forms can be used as long as the above effects can be obtained. A conventionally known technique may be appropriately used. The starting rotation of the rotating roller C may be appropriately controlled as necessary.

  Moreover, in this apparatus 310, you may provide the nozzle B which can eject compressed air, water, etc. so that it may illustrate. In this case, when solids are clogged in the eyes of the endless belt-like filter cloth 36 due to jetted compressed air or the like, it is blown off to the opposite side to prevent clogging. Therefore, by providing the nozzle B, the filtering function of the endless belt-like filter cloth 36 can be maintained better.

The dehydrating apparatus of the present invention can increase the processing capacity as the rotational speed of the rotating tank is increased. As described above, if two or more sets of filter separation means and water storage tanks using an endless belt-shaped filter cloth are provided, the processing capacity can be improved. A slurry solid-liquid separation treatment of 2 t (2 m ³ ) was possible. The separated solid could be discharged out of the apparatus without any problem.

  If the design of the apparatus is further refined so that it can be rotated at a higher speed, it is possible to perform a solid-liquid separation process on a slurry of 6 t 2 / min at 1000 rpm. This processing capacity is comparable to the maximum processing capacity of 8 inches (onshore sand pump), and is a level of processing capacity that can be used even during on-site restoration work in the event of a disaster such as a sediment disaster. As described above, the present invention can considerably increase the processing capability by increasing the rotation of the rotating tub without increasing the size of the apparatus itself.

The main specifications of the prototype device described above are as follows.
Rotating tank:
Material Normal iron plate (T3.2 SS400)
Capacity 160L
Size Top inner diameter 400mm
Bottom inner diameter 670mm
620mm height
Rotation speed up to 320rpm
Incoming pipe:
Length in the rotating tank 720mm
Inner diameter 75mm
Number of branch pipes at the lower end 2 pairs

Endless belt filter cloth:
Material Nylon 6 fiber Width 280mm
Thickness 1.3mm
Mesh 11 cm ² / cm ² . SEC
About 12 degrees angle with respect to the rotation axis of the rotating tank Driving the endless belt:
Travel speed 4710mm / min
Rotating direction Ejecting direction (From the inside toward the direction of smaller opening)
Permeable structure:
Material Nylon 6
Concrete structure Twill mesh
Water storage tank: Approximately 5.5L

  According to the dehydrating apparatus of the present invention, the discharge of the separated solid can be quickly processed at low cost, with low labor, and the processing capability can be increased by increasing the rotation of the apparatus without increasing the size of the apparatus itself. The processing capability that can be used is a level that can be used for processing necessary in disasters such as earth and sand disasters, and is an invention that is highly industrially applicable.

1, 2, 31 ... Rotating tanks 2, 22, 32 ... Feed pipes 3, 23, 33 ... Water storage tanks 4, 24, 34 ... Permeable structures 5, 25, 35 ... Filtering means 6, 26, 36 ... Endless belts Filter cloth 10, 210, 310 ... Dehydrator 27 ... Drain pipe 28 ... Drainage relay part M ... Solid S ... Slurry (flow)
W ... Water A ... Idler B ... Nozzle C ... Rotating roller

Claims (7)

Provided near the inner wall of the rotary tank, a rotary tank that is a tank in which the solid-liquid separation processing target slurry is received and rotated to perform the solid-liquid separation process, a feed pipe for feeding the slurry into the rotary tank, and the rotary tank And a water storage tank provided with a water-permeable structure on the side facing the rotation axis of the rotation, and a filtration means provided so as to perform a solid-liquid filtration operation on the rotation axis side of the water storage tank; And a rotation drive mechanism for rotating the rotating tub. The dewatering apparatus according to claim 1, wherein the filtering unit includes an endless belt-shaped filter cloth and an endless belt driving mechanism that rotationally drives the endless belt-shaped filter cloth. The dehydrating apparatus according to claim 2, wherein the endless belt-shaped filter cloth is provided so as to go around the water storage tank. 4. The feed pipe according to claim 2 or 3, wherein the feed pipe is provided on a rotation axis of the rotary tank, and two or more sets of the water storage tank and the filtering means are provided. Dehydration equipment. 5. The drain according to claim 2, wherein the water storage tank is provided with a drain pipe for discharging water passing through the filtering means and the water permeable structure to the outside of the apparatus. Dehydration equipment. The dehydrating apparatus according to any one of claims 2 to 5, wherein a part of the endless belt-shaped filter cloth is provided outside the rotating tank. The dehydrating apparatus according to any one of claims 2 to 6, wherein the rotating tank and the endless belt-shaped filter cloth are located in a casing.

Images