JP2014073459A - Solid-liquid separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separator which is simple and compact.SOLUTION: A solid-liquid separator is configured by including a separation tank 1 comprising: a separation tank upper section 11 which is constituted of an inside circular tube 11a and an outside circular tube 11b disposed outside of the inside circular tube 11a; a separation tank lower section 12 which is constituted of an extension of the outside circular tube 11b of the separation tank upper section 11; a core part 13 of a truncated conical tube, whose truncated surface 13a is disposed within the inside circular tube 11a of the separation tank upper section 11, and whose bottom surface 13b is disposed in the separation tank lower section 12; and a separation water discharge tube 14 whose one end is arranged in the vicinity of the truncated surface 13a of the core part 13 and whose another end is arranged at the outside, respectively.

Description

  The present invention uses an inertial force to efficiently remove sand, particles, contaminants, etc. contained in the water to be treated, and is capable of solid-liquid separation into these sedimentary substances and separated water. The invention relates to a liquid separation device.

  Conventionally, for example, as proposed in Patent Documents 1 and 2 below, water to be treated using inertial force is converted into sedimentary substances such as sand, particles, and contaminants contained therein, and separated water. A solid-liquid separation device for performing solid-liquid separation is known.

  The invention proposed in the following Patent Document 1 is provided with a stirring flow forming means, stirs the water to be treated in the tank, forms a swirling flow in a specific direction, and has a stirring flow forming means for solid-liquid separation. Related to the device. In this invention, it is said that by providing the stirring flow forming means, the efficiency and separation speed of solid-liquid separation can be increased by controlling the moving speed and moving direction of the particle group.

  In addition, the invention proposed in the following Patent Document 2 separates specific gravity difference between sand and dust by the swirling flow generated in the separation tank, and provides a sieve on the bottom wall to separate the particle size difference such as sand. Related to the sand separating and cleaning apparatus. In the present invention, it is said that particularly dust having a small specific gravity can be efficiently and selectively removed by specific gravity difference separation and particle size difference separation.

JP 2002-58913 A JP 2007-144390 A

  Thus, although several solid-liquid separation devices have been developed and proposed in the past, for example, the device proposed in Patent Document 1 requires stirring flow forming means such as a stirring blade. There is a concern that a certain amount of space will be required if solid-liquid separation is efficiently performed using this. In the apparatus proposed in Patent Document 2, even if dust having a small specific gravity can be efficiently and selectively removed, there remains a question about its removal efficiency. Therefore, even with a simple configuration that does not require a stirring flow forming means such as a stirring blade, a new solid state that can efficiently remove sedimentation substances such as sand, particles, and impurities contained in the water to be treated. Creation of a liquid separator is required. In particular, the apparatus proposed in Patent Document 2 pursues high efficiency in the flow of water for solid-liquid separation, and the apparatus proposed in Patent Document 1 uses a downward flow and swirl. Since the flow is merely a combination of two flows, it is expected to create a flow of water for further solid-liquid separation to promote extremely efficient solid-liquid separation.

  The present invention has been proposed in view of the above circumstances, and eliminates the stirring flow forming means and has a simple and compact configuration in consideration of the installation space. An object of the present invention is to provide a solid-liquid separation apparatus capable of liquid separation.

  In order to achieve the above object, the present invention provides a solid-liquid separation apparatus comprising a separation tank that separates water to be treated into separated water and a sedimentary substance using an inertia force, and the separation tank includes: It consists of an inner circular tube and an outer circular tube disposed outside the inner circular tube, and an inlet for introducing the water to be treated is formed between the outer circular tube and the inner circular tube. An upper part of the separation tank, an outer circular pipe extending from the upper part of the separation tank, and a lower part of the separation tank in which a discharge port for discharging the sedimentary substance that has settled at the bottom is formed. A tapered truncated conical tube that is closed, a truncated surface disposed in the inner circular tube at the upper part of the separation tank, and a bottom surface disposed at the lower part of the separation tank; One end is disposed in the vicinity of the chamfered surface, and the other end is disposed outside, and the separation water is discharged to the outside. Characterized in that it is composed of a extraction tube portion.

  In particular, in the solid-liquid separator, the water to be treated introduced into the inlet has a centrifugal force that separates the sedimentary substance to the outer circular tube side between the outer circular tube and the inner circular tube at the top of the separation tank. A swirling downward flow that swirls and descends accordingly, the swirling descending flow decelerates in the lower part of the separation tank, and a swirling flow that further separates the sedimentary substance. Further, it is preferable that the separated flow is separated into solid and liquid by a mechanism in which the separated water becomes the separated water separated and discharged to the outside through the discharge pipe portion.

  In the present invention, the separation tank is composed of an inner circular pipe and an upper separation tank composed of an outer circular pipe disposed outside the inner circular pipe, and a separation tank formed by extending the outer circular pipe at the upper part of the separation tank. It can be mainly composed of four members: a lower part, a core part that is a tapered truncated conical pipe that contracts vertically upward, and a discharge pipe part that becomes a passage through which separated water is discharged to the outside. Therefore, a simple solid-liquid separation device can be provided. No stirring flow forming means such as a stirring blade is required. By expanding the solid-liquid separation device in the vertical direction, the efficiency of solid-liquid separation can be further increased, installation space is not required more than necessary, and versatility can be given to the installation location.

  In particular, in the present invention, the water to be treated introduced into the inlet is swirled between the outer circular tube at the top of the separation tank and the inner circular tube with a centrifugal force for separating the sedimentary substance to the outer circular tube side. The swirling descending flow is lowered, the swirling descending flow is decelerated in the lower part of the separation tank, the swirling flow is further separated, the swirling flow is raised vertically upward in the core portion, By having a configuration in which separated water from which sedimentary substances are separated is obtained by using a reverse flow to be separated, and this is discharged to the outside through a discharge pipe section, three flows of swirling downflow, swirling flow, and reversing flow are provided. To create a flow of water that makes the best use of gravity and centrifugal force, and achieves a solid-liquid separation system from introduction to discharge without using extra energy, so it is extremely efficient To promote solid-liquid separation That. Since it is a mechanism of natural flow that makes the best use of gravity and centrifugal force, it can be provided at a low cost as a solid-liquid separation device with an extra configuration and energy reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing explaining the outline of one solid-liquid separator which concerns on this invention, Comprising: (a) is a schematic longitudinal cross-sectional view, (b) is AA sectional drawing of (a). It is explanatory drawing explaining a mode that the to-be-processed water swirls and descends in the solid-liquid separator which concerns on this invention, Comprising: (a) is a plane cross-sectional explanatory drawing, (b) is a longitudinal cross-sectional explanatory drawing.

  Hereinafter, an embodiment relating to the present invention will be described in detail. This embodiment is merely an example embodying the configuration of the present invention, and various design changes can be made without departing from the scope of the claims.

  As shown in FIG. 1, the solid-liquid separation device according to the present invention includes a separation tank 1 that separates water to be treated DW into separated water PW and a sedimentary substance S using solid inertia. The

  The separation tank 1 includes an inner circular pipe 11 a and a separation tank upper part 11 configured as a double pipe of the outer circular pipe 11 b disposed outside the inner circular pipe 11 a and an outer circular pipe of the separation tank upper part 11. Separation tank lower part 12 formed by extending 11b, a chamfering surface 13a is disposed in the inner circular tube 11a of the separation tank upper part 11, and a bottom surface 13b is disposed in the separation tank lower part 12 The conical tube includes a core portion 13 and a separated water discharge pipe 14 having one end 14a in the vicinity of the truncated surface 13a of the core portion 13 and the other end 14b disposed outside. In the solid-liquid separation device according to the present invention, the upper part of the separation tank and the lower part of the separation tank are formed separately, and then the outer circular pipe and the lower part of the separation tank are joined to form the separation tank. May be.

  Hereinafter, each configuration will be described in detail with reference to FIG.

  In the upper part of the separation tank 11, an inlet 111 for introducing the water to be treated DW is formed between the inner circular pipe 11 a and the outer circular pipe 11 b. In particular, the introduction port 111 is formed at a position that allows the treated water DW introduced to descend while turning between the inner circular tube 11a and the outer circular tube 11b (FIG. 1). (See (b)). Furthermore, a communication port 112 that communicates the space between the inner circular tube 11a and the outer circular tube 11b and the space inside the inner circular tube 11a further above the separation tank upper portion 11 than the introduction port 111, It is provided to buffer the pressure difference between these spaces.

  As will be described later, the water to be treated DW swirls in the separation tank 1 and turns into a reversal flow W4 from which the sedimentary substance S has been separated by the contact port 112, and enters the inner circular tube 11a. Although the separation water PW is retained, at this time, it is possible to suppress the occurrence of air accumulation in the space. It is also possible to adjust the liquid level (water level) of the water to be treated DW or the separated water PW that fills the space between the inner circular tube 11a and the outer circular tube 11b and the space inside the inner circular tube 11a. In addition, the top of the separation tank upper part 11 is closed to prevent intrusion of dust and the like from the outside, but an adjustment port 113 for removing air from the inside and supplying liquid such as water to the inside. Is provided.

  As described above, the lower part 12 of the separation tank is configured by extending the outer circular tube 11b of the upper part 11 of the separation tank. A sediment discharge port 121 is formed at the bottom 12a of the lower part 12 of the separation tank to discharge the sedimentary substance S precipitated by solid-liquid separation to the outside.

  The core portion 13 is a tapered truncated conical tube that contracts vertically upward. As described above, the truncated surface 13 a is disposed in the inner circular tube 11 a of the separation tank upper portion 11, and the bottom surface 13 b is disposed particularly in the vicinity of the peripheral wall of the separation tank lower portion 12. Since the core portion 13 has a taper shape that contracts vertically upward, as described later, after turning in the separation tank 1, the reverse flow W4 rising along the wall surface of the core portion 13, Further sedimentation of the sedimentary substance S contained therein can be promoted.

  The separated water discharge pipe 14 is provided with one end 14a so as to protrude in the vicinity of the chamfered surface 13a of the core portion 13, particularly in the vertical direction above the chamfered surface 13a. The other end 14b is disposed outside the separation tank 1 as described above. Thereby, the separated water discharge pipe 14 becomes a passage through which the separated water PW that has been sufficiently solid-liquid separated is discharged to the outside. The other end 14b of the separated water discharge pipe 14 is connected to the outside, for example, a pipe or the like provided in a processing apparatus to be processed next.

  Next, in the solid-liquid separation apparatus according to the present invention, a mechanism for treating the water to be treated introduced into the separation tank 1 will be described with reference to FIGS. 1 and 2.

  The treated water DW introduced into the inlet 111 of the separation tank upper portion 11 is first a space between the inner circular tube 11a and the outer circular tube 11b as shown in FIGS. 1 (b) and 2 (a). The swirl descending flow W1 swirling with centrifugal force separating the sedimentary substance S toward the outer circular tube 11b, and swirling and descending while separating the sedimentary substance S. Subsequently, as shown in FIGS. 1 (a) and 2 (b), the swirling descending flow W1 descends while swirling and descending in the space between the inner circular tube 11a and the outer circular tube 11b. The second swirl descending flow W2 that separates the sedimentary substance S is combined with the separation by centrifugal force and the separation by gravity using the difference in specific gravity of solid and liquid. Become.

  Furthermore, as shown in FIG. 1 (a), when the second swirling descending flow W2 is introduced into the lower part of the separation tank 12, the speed is further reduced, The swirl flow W3 further separates the sedimentary substance S by gravity using the specific gravity difference between the solid and liquid. The swirling flow W3 rises upward in the core portion 13 by the water to be treated DW introduced continuously, and collides with the tapered inner wall surface contracting vertically upward. The reverse flow W4 further separates the sedimentary substance S by gravity using the specific gravity difference.

  The reverse flow W4 stays inside the inner circular pipe 11a of the separation tank upper part 11 for a predetermined time by the treated water DW introduced continuously, and then is discharged to the outside through the separated water discharge pipe 14 by gravity. It becomes. That is, the reversal flow W4, when staying inside the inner circular tube 11a, further separates the sedimentary substance S by gravity using the specific gravity difference between the solid and liquid, and becomes separated water PW. In addition, since the sedimentary substance S separated at the time of residence has a tapered wall surface in which the core portion 13 contracts vertically upward, most of the sedimentary material S extends to the peripheral wall of the lower part of the separation tank 12 along the outer wall surface. Since it settles toward the bottom 12a along the peripheral wall of the lower part 12 of the separation tank, the separated sedimentary substance S is discharged to the outside through the separated water discharge pipe 14 together with the separated water PW. Being suppressed.

  As described above, in the present invention, the sedimentary substance S is continuously obtained from the time when the treated water DW is introduced into the inlet 111 of the upper part 11 of the separation tank until it is discharged to the outside as the separated water PW through the separated water discharge pipe 14. The solid-liquid separation device including the separation tank 1 configured to be able to continue the separation and to discharge only the separated separated water PW to the outside is achieved. In particular, such a configuration of the separation tank 1 can be achieved by mainly four members of the separation tank upper portion 11, the separation tank lower portion 12, the core portion 13, and the separation water discharge pipe 14. No stirring flow forming means such as a stirring blade is required. Therefore, the solid-liquid separation device according to the present invention can advance efficient solid-liquid separation with a simple and compact configuration.

  In particular, the first swirl descending flow W1 that is mainly solid-liquid separated by centrifugal force, the second swirl descending flow W2 that is solid-liquid separated by centrifugal force and gravity, the swirl flow W3 that is mainly solid-liquid separated by gravity, and the core Combining the three flows of the reversing flow W4, which is solid-liquid separated mainly by gravity while making use of the shape of the part 13, a flow of water that makes the best use of gravity and centrifugal force is created and introduced without using extra energy. Has achieved a system for solid-liquid separation consistently from discharge to discharge. For this reason, solid-liquid separation can be advanced extremely efficiently, and a solid-liquid separation device can be provided at low cost. If the solid-liquid separation device is expanded in the vertical direction, the time during which the sedimentary substance S is continuously separated can be lengthened, so that the efficiency of solid-liquid separation can be further increased. Space is not required more than necessary, and the installation location can be made versatile. In addition, it can be said that the separation tank 1 having such a configuration is a very simple solid-liquid separation device from the viewpoint of cost effectiveness because it is very easy to manufacture.

  Here, the present invention controls the ratio between the width (horizontal direction) between the outer circular tube 11b and the inner circular tube 11a in the separation tank upper portion 11 and the inner width (horizontal direction) of the inner circular tube 11a. Thus, it is possible to adjust the flow rate of the water to be treated DW swirling and descending as a swirl descending flow W1 between the outer circular tube 11b and the inner circular tube 11a of the separation tank upper part 11.

  That is, as the width between the outer circular tube 11b and the inner circular tube 11a is made relatively smaller (thinner) than the inner width of the inner circular tube 11a, the swirl descending flow W1 is swung down. The flow rate of the treated water DW can be increased. As the width between the outer circular tube 11b and the inner circular tube 11a becomes relatively larger (thick) than the inner width of the inner circular tube 11a, the water to be treated that swirls and descends as swirl descending flow W1. The flow rate of DW can be decreased. By adjusting the flow rate of the water to be treated DW, the centrifugal force applied to the water to be treated DW can be controlled between the outer circular tube 11b and the inner circular tube 11a, and the solid-liquid separation accuracy of the present invention can be improved. Can be increased. For example, if the flow rate of the water to be treated DW swirling and descending as the swirl descending flow W1 is increased and the centrifugal force applied to the water to be treated DW is increased, the separated water PW with higher accuracy can be obtained by the increased amount. It is.

  Then, according to the present invention, the diameter of the outer circular pipe 11b and the diameter of the inner circular pipe 11a constituting the upper part of the separation tank 11 are determined according to the accuracy of solid-liquid separation of the water to be treated DW required in the implementation. Therefore, it is possible to flexibly cope with the solid-liquid separation of the water to be treated DW that requires various precisions.

  As mentioned above, although one embodiment which the applicant of the present invention believes to be the best has been described in detail, the present invention is limited to the above-described embodiment without departing from the matters described in the claims. It is possible to make various design changes without any change. For example, in the above embodiment, the example in which the separated water is discharged to the outside through the separated water discharge pipe by gravity has been described. However, the present invention connects a pump to the other end of the separated water discharge pipe, and the separated water is separated by this pump. It is also possible to adopt a configuration in which the water is discharged to the outside through the separated water discharge pipe. In addition, the present invention is capable of separating water droplets, oil mists, and solids in gases as well as liquids.

1 ... separation tank (one embodiment)
11. Upper part of separation tank 11a Inner circular pipe 11b Outer circular pipe 111 Inlet port 112 Communication port 113 Adjusting port 12. Separation tank lower part 12a Bottom 121 Precipitate outlet 13. Core part 13a Cutting face 13b ・ Bottom face 14 ・ ・ Separate water discharge pipe (discharge pipe)
14a · one end 14b · other end DW · · treated water W1 · · swirl descending flow W2 · · second swirl descending flow W3 · · swirl flow W4 · · reverse flow PW · · separated water S · · · sedimentation substance

Claims (2)

In a solid-liquid separation device equipped with a separation tank that separates water to be treated into separated water and a sedimentary substance using solid-liquid inertia,
The separation tank is
It consists of an inner circular tube and an outer circular tube disposed outside the inner circular tube, and an inlet for introducing the water to be treated is formed between the outer circular tube and the inner circular tube. An upper part of the separation tank;
An outer circular pipe at the upper part of the separation tank is extended, and a lower part of the separation tank in which a discharge port for discharging the sedimentary substance precipitated at the bottom is formed,
A taper-shaped truncated conical tube that vertically contracts upward, a truncated surface disposed in an inner circular tube at the upper part of the separation tank, and a core part disposed at the lower part of the separation tank; ,
One end of the core portion in the vicinity of the truncated surface, the other end is disposed outside, and a discharge pipe portion serving as a passage through which the separated water is discharged to the outside,
A solid-liquid separation device comprising: The treated water introduced into the introduction port swirls and descends with a centrifugal force separating the sedimentary substance to the outer circular tube side between the outer circular tube and the inner circular tube at the upper part of the separation tank. The swirl downward flow is decelerated at the lower part of the separation tank, and the swirl flow further separates the sedimentary substance. Furthermore, by becoming a reverse flow to be separated, the separated substance becomes the separated water separated and discharged to the outside through the discharge pipe part.
The solid-liquid separator according to claim 1.

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