Rotational flow sedimentation tank

Abstract

The utility model relates to a rotational flow sedimentation tank and belongs to the technical field of water treatment facilities. The inner cylinder comprises the first arc-shaped side wall and the second arc-shaped side wall, the adjusting water tank and the inner cylinder share the second arc-shaped side wall, the first arc-shaped side wall serves as the shared side wall of the outer cylinder and the inner cylinder, the occupied area and the construction amount can be reduced, and the whole outer cylinder is not of a traditional large cylinder structure any more; the two arc-shaped side walls are different in circle center axis, are approximately oval, and can be suitable for the situation that the space of a construction site is limited. Besides, through the combined design of the gate valve and the annular overflow port, the water level of the water tank and the water level of the inner cylinder can be conveniently controlled and adjusted, and the normal process production requirements of the rotational flow sedimentation tank are met.

Description

Technical Field

[0001] The utility model relates to a cyclone sedimentation tank and belongs to the technical field of water treatment facilities. Background Art

[0002] Cyclone sedimentation tanks are generally used in turbid water treatment systems in the metallurgical industry. The collected turbid water contains a large amount of impurities such as iron oxide. After sedimentation in the cyclone sedimentation tank, solid-liquid separation is achieved. The precipitated iron oxide and other impurities can be collected in the slag pool regularly using lifting facilities and grab buckets. The treated turbid water is pumped to the next treatment process through a water pump.

[0003] Conventional types of cyclone sedimentation tanks are generally divided into two basic types: internal cyclone sedimentation tanks and external cyclone sedimentation tanks. The internal cyclone sedimentation tank consists of three parts: the central barrel cyclone area, the outer ring sedimentation area, and the water suction well and pump station. The central barrel is also the channel for grabbing slag from the bottom of the tank. Wastewater containing oxidized iron sheets flows into the central barrel along the tangent by gravity flow, the water flow immediately drops, and then flows out from the bottom of the central barrel, rising steadily along the outer ring sedimentation area. Large pieces of iron sheets use centrifugal force to swirl to the side wall of the central barrel and then settle to the bottom of the barrel. The external cyclone sedimentation tank consists of three parts: the central barrel sedimentation area, the outer ring cyclone area, and the water suction well and pump station. The central barrel is also the channel for grabbing slag from the bottom of the tank.

[0004] Whether it is an internal rotation cyclone sedimentation tank or an external rotation cyclone sedimentation tank, the outer cylinder wall adopts a large diameter circular structure. However, for technical transformation projects in existing factory buildings, due to the narrow site and complex surrounding geological conditions, the excavation process is likely to affect the surrounding environment. Therefore, when there are factory buildings and buildings around the proposed cyclone sedimentation tank, it is usually encountered that there are no conditions for the construction of a large diameter circular cyclone tank. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cyclone sedimentation tank which can reduce the floor space and construction amount and is suitable for the situation where the construction site space is limited.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a cyclone sedimentation tank comprises an upper cylinder, a middle cylinder and a lower cylinder which are coaxially arranged from top to bottom in sequence, an inner cylinder is coaxially arranged on the outer peripheral area of ​​the lower cylinder, the upper cylinder, the middle cylinder, the lower cylinder and the inner cylinder are all circular cylinders arranged vertically with their axes, and the inner diameters are increasing; a slag flushing groove is connected to the middle position of the first arc-shaped side wall of the inner cylinder, and the internal flow channel of the slag flushing groove is designed so that water can flow into the inner cylinder along the tangent line by gravity flow; the inner cylinder has a first arc-shaped side wall connected to the inner cylinder, and ... The arc-shaped side wall is a second arc-shaped side wall arranged oppositely, and a third arc-shaped side wall is arranged in the outer area of ​​the inner cylinder, and the concave surface of the third arc-shaped side wall faces the side close to the inner cylinder, and the two ends of the third arc-shaped side wall are butt-jointed with the two ends of the first arc-shaped side wall to form the outer cylinder, and the two ends of the third arc-shaped side wall are butt-jointed with the two ends of the second arc-shaped side wall to form the side wall of the regulating water pool, and the regulating water pool bottom plate is arranged correspondingly below the side wall of the regulating water pool, and the bottom of the second arc-shaped side wall is provided with a gate valve connecting the regulating water pool and the inner cylinder; the inner cylinder ... An inner cylinder bottom plate is correspondingly arranged below the cylinder, and the lower end of the inner cylinder is butted against the inner cylinder bottom plate through a conical cylinder whose upper end diameter is larger than that of the lower end, and a sediment channel is formed between the lower end of the lower cylinder and the inner surface of the conical cylinder; the upper end position of the lower cylinder is higher than the lower end position of the middle cylinder, and the upper end inner wall of the lower cylinder cooperates with the lower end outer wall of the middle cylinder to form an annular overflow port, and the upper end outer wall of the lower cylinder is connected to the upper end inner wall of the inner cylinder through the water collecting tank bottom plate to form an annular water collecting tank, and the upper end of the annular water collecting tank is connected to the annular overflow port The side wall of the annular water collecting trough is provided with a connecting port connected to the regulating water pool; the lower end of the side wall of the upper cylinder and the inner wall of the outer cylinder are fixedly connected as a whole through the equipment platform layer, the bottom surface of the equipment platform layer and the top end of the second arc-shaped side wall and the top end of the middle cylinder are correspondingly fixedly connected as a whole, the top end of the upper cylinder and the top end of the outer cylinder are connected through the top plate, and the regulating water pool is equipped with a water pump and a water pumping pipe for pumping water out of the regulating water pool, as well as a water replenishment pump and a water replenishment pipe for replenishing water into the regulating water pool.

[0007] A further preferred solution is that the lower end of the lower cylinder has an annular extension portion which corresponds to the upper portion of the conical cylinder at the lower end of the inner cylinder and has the same taper.

[0008] A further preferred solution is: the outer cylinder, middle cylinder, lower cylinder, inner cylinder, equipment platform layer, conical cylinder, regulating pool bottom plate and inner cylinder bottom plate are all reinforced concrete structures; the upper cylinder is made of steel plates enclosed and welded; the upper surface of the equipment platform layer is provided with a plurality of platform columns distributed along annular intervals in the outer peripheral area of ​​the upper cylinder, the lower ends of the platform columns are connected to the beams of the equipment platform layer, and the upper ends of the platform columns are connected to the beams of the top plate, and the top plate adopts a cast-in-place concrete beam-slab structure.

[0009] A further preferred solution is that the regulating water tank is equipped with a slag flushing pump and a slag flushing pipe, the bottom surface of the flow channel of the gate valve is flush with the upper surface of the regulating water tank bottom plate at that position, the upper surface of the regulating water tank bottom plate is horizontally set or adopts a slope structure with the slope foot located on the side close to the inner tube.

[0010] The beneficial effects of the utility model are as follows: the regulating pool and the inner cylinder have a common second arc-shaped side wall, and the first arc-shaped side wall is used as the common side wall of the outer cylinder and the inner cylinder, which can reduce the floor space and construction volume. The outer cylinder as a whole is no longer a traditional large cylindrical structure, but is composed of two arc-shaped side walls with different central axes, which is similar to an oval shape and can be used in situations where the construction site space is limited. In addition, through the combined design of the gate valve and the annular overflow port, the water levels of the regulating pool and the inner cylinder can be more conveniently controlled to meet the normal process production requirements of the cyclone sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view of the utility model.

[0012] Figure 2 for Figure 1 Left view of .

[0013] Figure 3 It is a schematic diagram of the planar structure of the utility model (the slag flushing groove is not shown).

[0014] Figure 4 for Figure 3 Schematic diagram of the AA facade structure.

[0015] Parts numbers in the figure: outer tube 1, inner tube bottom plate 2, top plate 3, lower tube 4, middle tube 5, upper tube 6, inner tube 7, annular water collecting trough 8, equipment platform layer 9, platform column 10, slag flushing ditch 11, regulating pool 12, annular overflow port 13, connecting port 14, gate valve 15, annular extension 16. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figures 1 to 4 As shown, the utility model includes an upper cylinder 6, a middle cylinder 5 and a lower cylinder 4 which are coaxially arranged from top to bottom, and an inner cylinder 7 is coaxially arranged on the outer peripheral area of ​​the lower cylinder 4. The upper cylinder 6, the middle cylinder 5, the lower cylinder 4 and the inner cylinder 7 are all circular cylinders arranged vertically with their axes, and their inner diameters are increasing; a slag flushing ditch 11 is connected to the middle position of the first arc-shaped side wall of the inner cylinder 7, and the internal flow channel of the slag flushing ditch 11 is designed so that water can flow into the inner cylinder 7 along a tangent by gravity flow, and the connection structure of the slag flushing ditch 11 can be designed with reference to the traditional external rotation type cyclone sedimentation tank.

[0018] The inner cylinder 7 has a second curved side wall arranged opposite to the first curved side wall, and a third curved side wall is arranged in the outer area of ​​the inner cylinder 7, the concave surface of the third curved side wall faces the side close to the inner cylinder 7, the two ends of the third curved side wall and the two ends of the first curved side wall are butted to form the outer cylinder 1, the two ends of the third curved side wall and the two ends of the second curved side wall are butted to form the side wall of the regulating water pool 12, and the regulating water pool bottom plate is correspondingly arranged below the side wall of the regulating water pool 12. After such design, the regulating water pool 12 and the inner cylinder 7 have a common second curved side wall, and the first curved side wall is used as a common side wall of the outer cylinder 1 and the inner cylinder 7, which can reduce the floor space and construction amount. The outer cylinder 1 as a whole is no longer a traditional large cylindrical structure, but is composed of two sections of curved side walls (third curved side wall + first curved side wall) with different axis of the center axis, which is similar to an oval shape and can be applied to the situation where the construction site space is limited. The connection point of the first curved side wall and the second curved side wall can be determined according to the actual situation, and generally both can be designed as a semicircular structure.

[0019] A gate valve 15 connecting the regulating water pool 12 and the inner cylinder 7 is provided at the bottom of the second arc-shaped side wall; an inner cylinder bottom plate 2 is correspondingly provided below the inner cylinder 7, and the lower end of the inner cylinder 7 is butt-jointed with the inner cylinder bottom plate 2 through a conical cylinder whose upper end diameter is larger than that of the lower end, and a sediment channel is formed between the lower end of the lower cylinder 4 and the inner surface of the conical cylinder; the upper end position of the lower cylinder 4 is higher than the lower end position of the middle cylinder 5, and the upper end inner wall of the lower cylinder 4 cooperates with the lower end outer wall of the middle cylinder 5 to form an annular overflow port 13, and the upper end outer wall of the lower cylinder 4 is connected to the upper end inner wall of the inner cylinder 7 through the water collecting trough bottom plate to form an annular water collecting trough 8, and the annular water collecting trough 8 is formed. The upper end of the trough 8 is connected to the annular overflow port 13, and the side wall of the annular water collecting trough 8 is provided with a connecting port 14 connected to the regulating water pool 12; the lower end of the side wall of the upper tube 6 and the inner wall of the outer tube 1 are fixedly connected as a whole through the equipment platform layer 9, and the bottom surface of the equipment platform layer 9 and the top of the second arc-shaped side wall and the top of the middle tube 5 are correspondingly fixedly connected as a whole, and the top of the upper tube 6 and the top of the outer tube 1 are connected through the top plate 3. The regulating water pool 12 is equipped with a pumping pump and a pumping pipe for pumping water out of the regulating water pool 12, and a water replenishment pump and a water replenishment pipe for replenishing water into the regulating water pool 12. Equipment such as pumping pumps, pumping pipes, water replenishment pumps and water replenishment pipes can be arranged in reasonable positions, and the main structure is mainly arranged on the above-mentioned equipment platform layer 9. The equipment platform layer 9 is the equipment installation layer, which is used for the installation of various production process equipment and the operation of personnel.

[0020] In the specific implementation, the wastewater containing oxidized iron sheet enters from the channel of the slag flushing ditch 11, flows into the inner cylinder 7 along the tangent line by gravity flow, and the water flow immediately descends. The iron sheet uses centrifugal force to swirl to the side wall of the inner cylinder 7 and then settles to the bottom of the cylinder. Under the guidance of the conical cylinder, the slag is finally mainly deposited in the middle area of ​​the inner cylinder 7. The slag is grabbed from the bottom of the sedimentation area of ​​the inner cylinder 7. When grabbing the slag, generally a crane can be used to grab the slag regularly. This is a conventional technology in the field and has nothing to do with the improvement of the utility model, so it will not be described in detail. The wastewater after precipitation can pass through the annular overflow port 13, the annular water collection tank 8 and the connecting port 14 in turn, and finally overflow into the regulating water pool 12. The water in the cavity of the regulating water pool 12 is pumped out by the pumping pump and the pumping pipe to ensure the production water supply requirements. In addition, when the water level of the regulating water pool 12 and the inner cylinder 7 is abnormal, it can also be adjusted by the gate valve 15 to meet the normal process production requirements of the cyclone sedimentation tank. For example, before the cyclone sedimentation tank is operated, when the initial water level of the inner tube 7 is low, the gate valve 15 can be opened to drain the water of the regulating water pool 12 into the inner tube 7. If the initial water storage capacity of the regulating water pool 12 is insufficient, the regulating water pool 12 can be further replenished with water through a water replenishment pump and a water replenishment pipeline.

[0021] The outer wall of the lower cylinder 4 mainly plays a guiding role so as to form a vortex in the annular cavity formed by the outer wall of the lower cylinder 4 and the inner wall of the inner cylinder 7. In order to facilitate the formation of the vortex, the lower end of the lower cylinder 4 has an annular extension portion 16 corresponding to the upper part of the conical cylinder at the lower end of the inner cylinder 7 and having the same taper, that is, the lower end of the annular extension portion 16 is spaced a certain distance from the bottom plate 2 of the inner cylinder, and the area below the annular extension portion 16 is the sediment channel.

[0022] In order to further improve the construction efficiency and take into account the construction cost and structural safety, the outer tube 1, the middle tube 5, the lower tube 4, the inner tube 7, the equipment platform layer 9, the conical tube, the regulating pool bottom plate and the inner tube bottom plate 2 in the utility model are all reinforced concrete structures; the specific size parameters can be designed according to the actual situation. For example, in a specific embodiment, the outer tube 1 can be designed as a reinforced concrete structure with a wall thickness of 1000mm, the second arc-shaped side wall of the inner tube 7 can adopt a reinforced concrete structure with a wall thickness of 500mm, and the wall thickness of the middle tube 5 and the lower tube 4 is 200mm.

[0023] The upper tube 6 is welded by enclosing steel plates; the upper surface of the equipment platform layer 9 is provided with a plurality of platform columns 10 distributed along annular intervals in the outer peripheral area of ​​the upper tube 6, the lower end of the platform column 10 is connected to the beam of the equipment platform layer 9, and the upper end of the platform column 10 is connected to the beam of the top plate 3, and the top plate 3 adopts a cast-in-place concrete beam-slab structure. In specific implementation, the lower end of the upper tube 6 can be fixedly connected to the embedded steel plate on the equipment platform layer 9, and the top end of the upper tube 6 can be fixedly connected to the embedded steel plate on the top plate 3.

[0024] In order to facilitate the cleaning of the accumulated slag in the regulating water pool 12, the regulating water pool 12 is equipped with a slag flushing pump and a slag flushing pipeline. The bottom surface of the flow passage of the gate valve 15 is flush with the upper surface of the bottom plate of the regulating water pool at this position. The upper surface of the bottom plate of the regulating water pool is horizontally arranged or adopts a slope structure with the foot of the slope located on the side close to the inner tube 7. When the slag needs to be cleaned, the slag flushing pump and the slag flushing pipeline are turned on, and the accumulated slag in the regulating water pool 12 can be flushed to the sediment area of ​​the inner tube 7 through the flow passage of the gate valve 15, and finally the slag is caught at the bottom of the sedimentation area of ​​the inner tube 7.

Claims

1. Cyclone sedimentation tank, characterized by: The invention comprises an upper cylinder (6), a middle cylinder (5) and a lower cylinder (4) which are coaxially arranged in sequence from top to bottom, an inner cylinder (7) is coaxially arranged on the outer peripheral area of ​​the lower cylinder (4), the upper cylinder (6), the middle cylinder (5), the lower cylinder (4) and the inner cylinder (7) are all circular cylinders arranged vertically along the axis, and the inner diameters are increasing; a slag flushing groove (11) is connected to the middle part of the first arc-shaped side wall of the inner cylinder (7), and the internal flow channel of the slag flushing groove (11) is designed so that water can flow into the inner cylinder (7) along a tangent line by gravity flow; the inner cylinder (7) has a second arc-shaped side wall arranged opposite to the first arc-shaped side wall, and the inner cylinder ( A third curved side wall is arranged at the outer area of ​​the inner tube (7), the concave surface of the third curved side wall faces the side close to the inner tube (7), the two ends of the third curved side wall and the two ends of the first curved side wall are butted together to form an outer tube (1), the two ends of the third curved side wall and the two ends of the second curved side wall are butted together to form a side wall of a regulating water pool (12), a regulating water pool bottom plate is arranged correspondingly below the side wall of the regulating water pool (12), and a gate valve (15) connecting the regulating water pool (12) and the inner tube (7) is arranged at the bottom of the second curved side wall; an inner tube bottom plate (2) is arranged correspondingly below the inner tube (7), and the lower part of the inner tube (7) is provided with a gate valve (15) connecting the regulating water pool (12) and the inner tube (7); The ends are butt-jointed with a conical cylinder whose upper end diameter is larger than that of the lower end and an inner cylinder bottom plate (2); a sediment channel is formed between the lower end of the lower cylinder (4) and the inner surface of the conical cylinder; the upper end position of the lower cylinder (4) is higher than the lower end position of the middle cylinder (5); the upper end inner wall of the lower cylinder (4) cooperates with the lower end outer wall of the middle cylinder (5) to form an annular overflow port (13); the upper end outer wall of the lower cylinder (4) and the upper end inner wall of the inner cylinder (7) are connected through a water collecting tank bottom plate to form an annular water collecting tank (8); the upper end of the annular water collecting tank (8) is connected to the annular overflow port (13); the side wall of the annular water collecting tank (8) A communication port (14) is provided which is connected to the regulating water pool (12); the lower end of the side wall of the upper cylinder (6) and the inner wall of the outer cylinder (1) are fixedly connected to form a whole through the equipment platform layer (9); the bottom surface of the equipment platform layer (9) and the top end of the second arc-shaped side wall and the top end of the middle cylinder (5) are correspondingly fixedly connected to form a whole; the top end of the upper cylinder (6) and the top end of the outer cylinder (1) are connected through the top plate (3); the regulating water pool (12) is equipped with a pumping pump and a pumping pipe for pumping water out of the regulating water pool (12), and a replenishing pump and a replenishing pipe for replenishing water into the regulating water pool (12).

2. The cyclone sedimentation tank according to claim 1, characterized in that: The lower end of the lower cylinder (4) has an annular extension portion (16) which corresponds to the upper portion of the conical cylinder at the lower end of the inner cylinder (7) and has the same taper.

3. The cyclone sedimentation tank according to claim 1, characterized in that: The outer cylinder (1), the middle cylinder (5), the lower cylinder (4), the inner cylinder (7), the equipment platform layer (9), the conical cylinder, the regulating pool bottom plate and the inner cylinder bottom plate (2) are all reinforced concrete structures; the upper cylinder (6) is formed by welding steel plates; the upper surface of the equipment platform layer (9) is provided with a plurality of platform columns (10) distributed along an annular interval in the outer peripheral area of ​​the upper cylinder (6); the lower ends of the platform columns (10) are connected to the beams of the equipment platform layer (9), and the upper ends of the platform columns (10) are connected to the beams of the top plate (3); and the top plate (3) adopts a cast-in-place concrete beam-slab structure.

4. The cyclone sedimentation tank according to any one of claims 1 to 3, characterized in that: The regulating water pool (12) is equipped with a slag flushing pump and a slag flushing pipeline. The bottom surface of the flow passage of the gate valve (15) is flush with the upper surface of the regulating water pool bottom plate at that position. The upper surface of the regulating water pool bottom plate is horizontally arranged or adopts a slope structure with the slope foot located on the side close to the inner tube (7).

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