JP2000117004A - Solid-liquid separation vessel for gravity settling type solid-liquid separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separation vessel for gravity settling type solid-liquid separation device, which is capable of remarkably increasing the throughput by remarkably improving solid-liquid separation efficiency and is eliminated in the adverse effect on treating liquid caused by scraping generated deposit. SOLUTION: The solid-liquid separation vessel for the gravity settling type solid-liquid separation device is constituted so that a solid-liquid separation part structured by horizontally laying sheet like endless rotary members 15 vertically in two or more stages at a required interval is provided in the solid- liquid separation vessel main body 1 provided with an introducing port part and a discharging port for solid-liquid separation objective treating liquid L and the deposit D settled on the upper surface of each sheet like endless rotary member 15 of the solid-liquid separation part is moved to the end part of each endless rotary member 15 by the rotary movement of the endless rotary member 15, is removed at the end part from each endless rotary member 15 and settled and is recovered in a recovery part 5 of the deposit, which is disposed in the solid-liquid separation vessel main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a solid-liquid separation tank in a gravity sedimentation type solid-liquid separation device, and more particularly, to a solid-liquid separation object in a gravity sedimentation type solid-liquid separation device, For example, in a factory drainage, muddy water discharged from a civil engineering construction site or in a production line of a factory, solid matter in liquid requiring solid-liquid separation is settled as it is, or coagulation is performed by adding a coagulant or the like. To the improvement of a solid-liquid separation tank for sedimentation after separation.

[0002]

2. Description of the Related Art Conventionally, several types of solid-liquid separation tanks are provided in a gravity sedimentation type solid-liquid separation apparatus. For example, as shown in FIG. By arranging a plurality of inclined plates B in a row at appropriate intervals, the contact area of the solid-liquid separation tank main body A is increased to improve the collection efficiency of the precipitate, and the inclined plates B
A type in which solid particles such as sludge precipitated on the upper surface are slid down and collected by the inclination angle of the inclined plate B,
Alternatively, as schematically shown in FIG. 9, an inclined plate which is originally a single plate is divided into a plurality of plates and these are successively provided in a "U-shape" and a "reverse-shape". There is known a type in which C is arranged at appropriate intervals to further improve the former effect.

[0003]

However, in the former case of the prior art described above, it is difficult to sufficiently remove the precipitates D of solid particles such as sludge settled on each inclined plate B. The sediment D of solid particles such as sludge, which remains and adheres to the bottom, blocks the gap between the upper inclined plate B and the flow path of the processing liquid to be separated cannot be used effectively. There is a problem that the separation process often falls into an impossible state.

[0004] In order to solve this problem, a technique has been developed which uses a modified inclined plate C which is combined with the latter "U-shaped" and "reverse-shaped". In this case, the following new problem occurs.

That is, now, the upper inclined plate C of the "U" shape is used.
Precipitate D of solid particles such as sludge precipitated on the surface of ₁
Slides down the upper surface of the inclined plate C ₁ , falls on the surface of the lower inclined plate C ₂ , and further slides down the surface of the inclined plate C ₂ , and moves down the upper surface of the lower “inverted shape”. fall on the surface of the C _3,
Although from the top in this way is not going to move to the lower, e.g., precipitate D of solid particles such as sludge and slide off the lower end of the inclined plate C ₁ of the surface, the upper surface of the inclined plate C ₂ below until it reaches the, will be free fall in water, of the inclined plate C ₁ lower because the clearance of the upper end of the inclined plate C ₂ is also a place where the liquid is flowing, such as sludge in the middle drop The precipitate D of solid particles must pass through a situation where it is easily dispersed and diffused in water again.

Further, in any of the above-mentioned prior arts, the precipitate D of solid particles such as sludge which has moved from the upper surface to the lower surface of the inclined plate finally becomes a flat area within the separation tank body A. It becomes stable only after dropping below each of the large number of inclined plates installed so as to occupy most, that is, the entire bottom surface of the separation tank main body A, but this precipitate D is taken out of the separation tank main body A. For this purpose, a large amount of sediment must be collected in one place. For this reason, the present situation is to install a sludge scraping device such as a rake or a flight.

Thus, in the case of these prior arts,
In the situation where it is difficult to distinguish between the place used for the sedimentation separation treatment in the separation tank body A and the place where the sediment is raked, that is, the place used for collection and transfer, the solid-liquid Separation is performed, and the sludge, which is a sediment, is raked at the bottom of the tank. The classification changes momentarily depending on the treatment state and is fluid. There is a high possibility that the alignment processes may interfere with each other, and there is a problem that causes various obstacles.

The present invention has been researched and developed with the object of solving the above problems. The efficiency of solid-liquid separation can be remarkably improved, the throughput can be remarkably increased, and the generated precipitates can be remarkably increased. It is an object of the present invention to provide a solid-liquid separation tank in a gravity sedimentation type solid-liquid separation device which eliminates an adverse effect on a treatment liquid due to scraping.

[0009]

As a means for solving the above-mentioned problems and achieving the object, the present invention provides a solid-liquid having an inlet and an outlet for a processing liquid to be separated. A solid-liquid separation unit is provided in the separation tank main body, in which a plurality of sheet-like endless rotating members are horizontally arranged vertically at predetermined intervals, and each sheet-like endless rotation of the solid-liquid separation unit is provided. The sediment settled on the upper surface of the member is moved to the end of each endless rotating member by the rotation of the endless rotating member, and the sediment is separated from each endless rotating member at the end and settled, and solid-liquid separation is performed. It is intended to provide a solid-liquid separation tank in a gravity sedimentation type solid-liquid separation device, which is configured to be collected in a collection part of a precipitate provided in a tank body.

Further, according to the present invention, in the solid-liquid separation tank of the gravity sedimentation type solid-liquid separation device configured as described above, each endless rotating member is configured to rotate in the same direction. A solid-liquid separation tank in a gravity sedimentation type solid-liquid separation device, wherein a sediment recovery part is provided below an end of the upper surface of the endless rotation member on the movement direction side, and each endless rotation At least one of the members is configured to rotate in a direction opposite to the other endless rotating member, and a precipitate collecting section is provided below both ends of each endless rotating member. The solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device, characterized in that, the bottom surface of the solid-liquid separation tank body is formed in a valley shape with a downward slope on both sides of the intermediate portion, Sheet-like end across the valley A plurality of horizontal rotating members are horizontally arranged vertically at a predetermined interval, and at least one of the endless rotating members is configured to rotate in a direction opposite to the other endless rotating members, A solid-liquid separation tank is provided in a gravity sedimentation type solid-liquid separation apparatus, wherein a collection part of a precipitate is provided on a bottom of a bottom of the solid-liquid separation tank body.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram schematically showing an entire solid-liquid separation apparatus for a processing liquid to be subjected to solid-liquid separation. In the figure, a is the direction of introduction of the treatment liquid to be subjected to solid-liquid separation, b is the reaction tank, c is the inorganic coagulant supply section in the reaction tank b, and d is the supply of the pH adjusting agent in the reaction tank b. , E is a pH meter, f is a coagulation tank, g is a polymer coagulant supply section into the coagulation tank f, h is before and after the solid-liquid separation tank main body 1, and an inlet port of the processing liquid to be subjected to solid-liquid separation. Solid-liquid separation tank provided with an outlet 2 and an outlet 3; i
Indicates the discharge direction of the processing liquid.

The present invention relates to the improvement of the solid-liquid separation tank h, and several embodiments of the embodiment will be sequentially described with reference to the accompanying drawings.

FIG. 2 to FIG. 5 show a first embodiment of a solid-liquid separation tank in a gravity sedimentation type solid-liquid separation apparatus according to the present invention. Separately, the solid-liquid separation tank main body 1, the inlet 2 and the outlet 3 of the processing liquid to be subjected to solid-liquid separation provided before and after inside the solid-liquid separation tank main body 1, the inlet 2 and the outlet 3, a solid-liquid separation unit 4 provided in the solid-liquid separation tank main body 1, and a precipitate collection unit separated from the solid-liquid separation unit 4 and provided at the bottom of the solid-liquid separation tank main body 1. And 5.

The processing liquid inlet 2 is provided with an inlet pipe 6 for the processing liquid L to be subjected to solid-liquid separation, and an inlet groove for the processing liquid L disposed below the leading end of the inlet pipe 6. 7, an overflow portion 8 for the processing liquid L flowing into the inflow groove 7, and a rectifying portion 9 for the overflowing processing liquid L.

The discharge port 3 for the processing liquid is provided with a rectifying section 10 for the processing liquid L after solid-liquid separation, an adjusting plate 11,
It comprises a liquid collecting groove 12 for the processing liquid L, an overflow portion 13 into the liquid collecting groove 12, and a discharge pipe 14 for the processing liquid L.

In the present embodiment, the solid-liquid separation section 4 includes a sheet-like endless rotating member 15 that rotates in a direction transverse to the direction of introduction of the processing liquid L, that is, a rubber sheet, a plastic sheet, or the like. An endless sheet 16 formed by using a material is stretched across a rotating roller 17 and a driven roller 18 which are rotatably arranged opposite to each other with a sufficient interval kept in the solid-liquid separation tank main body 1. The endless rotating member 15 is horizontally or slightly inclined and horizontally arranged at a plurality of levels vertically, and the endless rotating member 15 is passed through the sprocket 20 provided on the drive motor 19 and each rotating roller 17 and each sprocket 20. Each of the sheet-like endless rotating members 15 is configured to rotate in the same direction via the drive chain 21, and each of the sheet-like endless rotating members 15 is The end of the moving direction of the endless sheet 16 surface side is configured the scraper 22 obliquely upward abutment arranged to. In the drawing, reference numeral 23 denotes a member for applying a tension to each sheet-like endless rotating member 15.

Further, the sediment recovery section 5 is provided with a motor 2
In this embodiment, the screw conveyor 25 is rotated by the screw conveyor 25.
The direction of movement of the upper-side sheet at a position separated from the solid-liquid separation unit 4 is located on the bottom of the tank below the end of the sheet-like endless rotary member 15 on the moving direction side of the sheet-like endless rotating member 15 disposed in a plurality of stages. The sediment that has settled on the screw conveyor 25 is disposed across the sediment discharge pipe 26.
It is configured to be transferred to the side and discharged.

Next, the first embodiment of the present invention constructed as described above is described.
The solid-liquid separation state of the embodiment will be described together with the operation and effect. Treatment liquid L subject to solid-liquid separation after coagulation treatment in coagulation tank
As shown schematically in FIGS. 2 and 3,
Is introduced into the rectification section 9 of the processing liquid introduction port 2 through the introduction pipe 6, the inflow groove 7 and the overflow section 8, and is gently introduced from the rectification section 9 into the solid-liquid separation section 4.

While the treatment liquid L introduced into the solid-liquid separation section 4 passes through the solid-liquid separation section 4, the precipitate D composed of solid particles such as sludge in the treatment liquid L is shown in FIG. As shown,
The solid-liquid separating section 4 sinks one after another on the upper surface of the sheet-like endless rotating members 15... 15 horizontally arranged in a plurality of stages in the same direction as the endless rotating members 15. Of the sediment provided on the bottom of the tank separated from the solid-liquid separation unit 4 by the scrapers 22 provided at the moving side end. It settles on the screw conveyor 25 arranged in the collecting section 5.

The sediment D sedimented and deposited on the screw conveyer 25 is intermittently or continuously rotated for a certain period of time, and the sediment discharge pipe 2 is rotated by the screw conveyer 25.
It is carried to the 6 side and discharged out of the tank.

The processing liquid L after the solid-liquid separation processing is
As shown schematically in FIGS. 2 and 3, the discharge port 3 of the processing liquid L
Through the rectifying section 10, overflows from the overflow section 13 into the liquid collecting groove 12, and the discharge pipe 14
From the tank.

As is apparent from the above description, the solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device according to the first embodiment of the present invention has the following operations and effects.

Since the solid-liquid separation section 4 in the solid-liquid separation tank main body 1 is constructed by arranging a plurality of sheet-like endless rotary members 15 vertically at a predetermined interval, a plurality of sheet-like endless rotating members 15 are provided. The sedimentation area of the sediment D per se can be significantly increased, and the sedimentation separation efficiency can be remarkably improved.

By the rotating action of each sheet-like endless rotating member 15, the precipitate D is separated and removed from the sheet surface.
New endless sheet 1 without sediment D
Since the upper surface of 6 can be continuously moved and supplied one after another, continuous operation of the solid-liquid separation operation is possible, and the solid-liquid separation efficiency can be significantly improved.

The sediment D that has settled on the upper surface of the endless sheet 16 is moved in the tank during the movement by the quiet movement of the endless rotating member 15 in the lateral direction (horizontal direction or inclined direction with a slight angle). There is no danger of slipping and spreading in the liquid, and the quality of the processing liquid L after solid-liquid separation can be improved.

The sediment D that has settled on the upper surface of each endless sheet 16 is steadily sent to the sediment discharge pipe 26 side by the screw conveyor 25 of the sediment collecting part 5 provided at one place at the bottom of the tank. Can be discharged outside.

A conventional gravity sedimentation type solid-liquid separation tank constructed by arranging a plurality of inclined plates, or a gravity sedimentation constructed by arranging in a "U-shape" and "inverted-shape". The above-mentioned various problems of the solid-liquid separation tank can be reliably solved. For example, since the solid-liquid separation section 4 and the precipitate recovery section 5 are provided separately, the solid-liquid separation section is provided. Both treatments can be performed separately and orderly without interference between the treatment and the precipitation recovery treatment.

Next, FIG. 6 schematically shows a second embodiment of the present invention. The difference from the first embodiment is that the solid-liquid separation tank main body 1 is provided. This is the point of the configuration and operation of the solid-liquid separation unit 4 and the location of the precipitate collection unit 5.

That is, in this embodiment, for example, in the solid-liquid separation tank main body 1, both sides of each of the rotating rollers 17 of the sheet-like endless rotating members 15 horizontally arranged in a plurality of stages are short and large. The rotation transmission rotators 27, 27 having the diameters are attached, the rotation transmission rotators 27, 27 of the upper and lower rotation rollers 17 are brought into contact with each other, and the uppermost sheet-shaped endless rotation member 15 is rotated. A sprocket 20 is provided only on the moving roller 17, and the sprocket 20 and the sprocket 20 on the drive motor 19 side are provided.
The drive chain 21 is passed through the endless rotation member 15 and the rotation of the drive motor 19 is directly performed.
The rotation roller 17 is rotated only by transmitting the rotation to the rotation roller 17, and the other rotation rollers 17 are rotated through the rotation transmission rotators 27, 27 that are brought into contact with the rotation roller 17. I have.

Therefore, according to this embodiment, the upper and lower sheet-like endless rotary members 15 rotate alternately in opposite directions, and more specifically, as shown by arrows in FIG. In addition, the upper surface of the endless seat 16 of the endless rotating member 15 at the uppermost stage moves rightward toward FIG. 6, and the upper surface of the endless seat 16 of the endless rotating member 15 at the second stage moves toward FIG. In this manner, the upper surface of each endless seat 16 alternately moves in the opposite direction.

In this embodiment, since the upper and lower sheet-like endless rotary members 15 rotate alternately in opposite directions, the scrapers 22 are also arranged alternately on the right and left sides. As a result, the two screw conveyors 2 constituting the sediment recovery section 5 are provided at two places on the left and right of the tank bottom.
5, 25 are provided.

Another configuration of the second embodiment, that is, the configuration of the processing liquid inlet 2 and the outlet 3 and the solid-liquid separator 4
Since the configuration other than the above and the arrangement direction of the processing liquid inlet 2, outlet 3, solid-liquid separator 4 and the like are the same as those of the first embodiment, these will be illustrated and described. Are omitted, and the solid-liquid separation unit 4 shown in FIG.
The same reference numerals are given to the same portions as those of the embodiment.

The operation and effects of the second embodiment configured as described above are the same as those of the first embodiment. Therefore, the description is omitted, but the solid-liquid separation in the second embodiment is omitted. Since the configuration of the rotation roller 17 in the sheet-like endless rotation member 15 of the portion 4 is slightly simpler than the configuration of the first embodiment, there is an advantage that the equipment is simple and failures are less likely to occur. However, on the other hand, it is necessary to provide the sediment collecting sections 5 and 5 at two places on the bottom of the tank, so that two screw conveyors 25 and 25 and two not-shown sediment discharge pipes 26 and 26 are connected. There are issues that need to be addressed.

FIG. 7 schematically shows a third embodiment of the present invention. What is different from the second embodiment is that the solid-liquid separation tank main body 1 has a tank bottom. And the configuration of the sediment recovery section 5, that is, the location of the screw conveyor 25, and other configurations, operations, and effects are the same. The same reference numerals are given to the same parts as in the embodiment.

In this embodiment, the bottom surface of the solid-liquid separation tank main body 1 is formed in a valley shape having downward inclined surfaces 28, 28 on both sides of the intermediate portion when viewed from the front-back direction. 2
The solid-liquid separation unit 4 is constituted by a precipitation recovery unit 5, that is, one screw conveyor 25, arranged along the top of the unit 9.

According to the third embodiment constructed as described above, each of the sheet-like endless rotary members 15 horizontally arranged in a plurality of stages vertically turns alternately in opposite directions, and the endless sheet 16 is rotated. Even if the sediment D settled on the upper surface of the tank settles on both sides of the tank bottom, the sediment D remains on both downward slopes 28 of the tank bottom,
Sliding down to the valley bottom 29 along the valley bottom 29, and collected by the screw conveyor 25 on the valley bottom 29 and discharged out of the tank, the sediment D settled on both sides of the tank bottom by one screw conveyor 25 is surely Has the advantage of being able to discharge
In this respect, it is superior to the second embodiment.

Although the main embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and a range that can achieve the object of the present invention and does not deviate from the gist of the invention is described. Various design changes are possible within
All of them are also included in the claims of the present invention.

[0038]

According to the present invention, a sheet-like endless rotating member is provided in a solid-liquid separation tank main body having an inlet and an outlet for a processing liquid to be separated into solid and liquid, with a required interval being maintained. The solid-liquid separating section is provided in a plurality of stages horizontally, and the sediment settled on the upper surface of each sheet-like endless rotating member of the solid-liquid separating section is rotated by the endless rotating member. Moving to the end of the moving member, separating and sedimenting the sediment from each endless rotating member at the end, and collecting the sediment in a sediment collecting part provided in the solid-liquid separation tank main body. The present invention relates to the solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device, and has the following useful and remarkable effects.

(1) Since the solid-liquid separation section in the solid-liquid separation tank main body is constituted by vertically arranging a plurality of sheet-like endless rotating members vertically at predetermined intervals, one separation is performed. Can significantly increase the sedimentation area of sediment per tank,
The sedimentation efficiency can be significantly improved.

(2) The sediment is separated and removed from the upper surface of the endless sheet by the rotating action of each sheet-like endless rotating member, and the upper surface of the new endless sheet on which the sediment has not settled continues one after another. Since the liquid can be supplied in a rotational manner, continuous operation of solid-liquid separation is possible, and the solid-liquid separation efficiency can be significantly improved.

(3) The sediment that has settled on the upper surface of the endless sheet is gently moved in the lateral direction of the sheet.
There is no danger of slipping and diffusing into the liquid in the tank during the movement of the sheet, and the quality of the solid-liquid separated processing liquid can be improved.

(4) The sediment settled on the upper surface of each endless sheet is separated and removed from the sheet surface at the moving end of the upper surface of the endless sheet, and the sediment provided on the tank bottom at the moving end is recovered. The part can be collected reliably.

(5) A conventional gravity sedimentation type solid-liquid separation tank constructed by arranging a plurality of inclined plates in a row, or by being arranged in a row in a "U-shape" and a "reverse-shape". The above-mentioned various problems of the gravity sedimentation type solid-liquid separation tank can be surely solved.

[Brief description of the drawings]

FIG. 1 is a block diagram of an entire gravity sedimentation type solid-liquid separation device.

FIG. 2 is a schematic plan view showing a first embodiment of a solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device according to the present invention.

FIG. 3 is a schematic side view showing the inside of the solid-liquid separation tank of FIG. 2;

FIG. 4 is a schematic front view showing the inside of the solid-liquid separation tank of FIG. 2;

FIG. 5 is an explanatory view schematically showing a sediment settling, moving and collecting state of the solid-liquid separation tank according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram schematically showing a sediment settling, moving, and collecting state of a solid-liquid separation tank according to a second embodiment of the present invention.

FIG. 7 is an explanatory view schematically showing a sediment settling, moving and collecting state of a solid-liquid separation tank according to a third embodiment of the present invention.

FIG. 8 is an explanatory view schematically showing a sedimentation state of a precipitate by an example of a solid-liquid separation tank in a conventional gravity sedimentation type solid-liquid separation device.

FIG. 9 is an explanatory view schematically showing a sedimentation state of a precipitate by another example of a solid-liquid separation tank in a conventional gravity sedimentation type solid-liquid separation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solid-liquid separation tank main body 2 Processing liquid introduction port 3 Processing liquid discharge port 4 Solid-liquid separation section 5 Precipitate recovery section 6 Processing liquid introduction pipe 7 Processing liquid inflow groove 8 Overflow section 9 Introduction section Rectifying section 10 side rectifying section 11 discharge port side 11 regulating plate 12 liquid collecting groove 13 overflow section 14 processing liquid discharge pipe 15 sheet-like endless rotating member 16 endless sheet 17 rotating roller 18 driven roller 19 drive Motor 20 sprocket 21 drive chain 22 scooper 23 tension applying member 24 drive motor 25 screw conveyor 26 sediment discharge pipe 27 rotation transmitting rotator 28 downward inclined surface 29 valley bottom

Claims (4)

[Claims] 1. A solid-liquid separation tank main body having an inlet and an outlet for a treatment liquid to be separated into solid and liquid is provided with a sheet-like endless rotating member at a required interval and a plurality of horizontal and vertical members. A solid-liquid separating section is provided, and the sediment settled on the upper surface of each sheet-like endless rotating member of the solid-liquid separating section is moved to the end of each endless rotating member by rotating the endless rotating member. Wherein the sediment is separated and settled from each endless rotating member at the end, and is collected in a sediment collecting section provided in the solid-liquid separation tank main body. A solid-liquid separation tank in a solid-liquid separation device. 2. The endless rotary member is configured to rotate in the same direction, and a precipitate collecting portion is provided below an end of the upper surface of each endless rotary member on the moving direction side. The solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device according to claim 1, wherein: 3. At least one of the endless rotating members is configured to rotate in a direction opposite to the other endless rotating members, and is provided at a lower part of both ends of each endless rotating member. The solid-liquid separation tank in the gravity sedimentation type solid-liquid separation device according to claim 1, wherein a collection part of the precipitate is provided. 4. The bottom surface of the solid-liquid separation tank main body is formed in a valley shape having a downward slope on both sides of an intermediate portion, and a sheet-like endless rotating member is provided at a required interval across the valley of the bottom surface. And a plurality of endless turning members are arranged so as to turn in the opposite direction to the other endless turning members, and the bottom surface of the solid-liquid separation tank main body. The solid-liquid separation tank in the gravity sedimentation type solid-liquid separation apparatus according to claim 1, wherein a collection part of the precipitate is provided on the bottom of the valley.