CN211676446U - A elementary sedimentation tank for waste water treatment - Google Patents

Abstract

The utility model discloses a primary sedimentation tank for waste water treatment, including the cell body that three order is connected, set up the overflow weir between the adjacent cell body, set up the overflow pipe on the first overflow weir, this side that the overflow pipe is being close to the overflow weir sets up a plurality of delivery ports, and a plurality of decanters arrange at the end of overflow weir and tertiary pond, carry second grade pond and tertiary pond surface waste water to next one-level. The first-stage pool is used for collecting the coal-containing wastewater conveyed by the sewage pump of each transfer point in an automatic operation manner and mainly collecting and precipitating large-particle suspended matters; the secondary pond is used for preliminary sedimentation, and the overflow pipe plays main overflow effect, and the overflow pipe is when discharging waste water to the secondary pond, and waste water flows from the bottom and erodees the wall of overflow weir simultaneously, can reduce the disturbance of pond water to the at utmost, guarantees that coal-containing waste water has more abundant time stationary sedimentation in the secondary pond. The utility model is used for the sewage treatment field.

Description

A elementary sedimentation tank for waste water treatment

Technical Field

The utility model relates to a sewage treatment field especially relates to a primary sedimentation tank for waste water treatment.

Background

At present, along with the continuous promotion of energy-saving and environment-friendly requirements, industrial enterprises put forward the environment-friendly requirement of zero emission to wastewater, a coal conveying system of a power plant throws coal falling to the ground due to deviation, coal blockage and other reasons in the process of conveying raw coal, a ground washing mode is usually adopted after shoveling back to a belt conveyor, the ground coal-containing wastewater of the coal conveying system is collected by collecting tanks of all levels of transfer stations, the ground coal-containing wastewater is pumped to a coal yard coal-containing wastewater treatment sedimentation tank, and the ground coal-containing wastewater is transferred to a washing tank for recycling after being purified by a coal-containing wastewater treatment system, so that the target of zero emission of the. The process flow is as follows: the coal yard coal-containing wastewater collection tank → the decanter → the lift tank → the lift pump → the dosing treatment device → the flushing tank.

The primary sedimentation tank in the process is a first gate in the process link and plays a role in collecting the coal-containing wastewater, settling larger suspended particles and providing supernatant liquid for the next-stage lifting tank through a decanter device. In the existing primary sedimentation tank design, only one large sedimentation tank is often designed and arranged, one end of the large sedimentation tank is a water inlet, the other end of the large sedimentation tank is provided with a decanter to draw supernatant liquid with a relatively static upper end, the whole coal-containing wastewater collection and treatment process is automatic operation, and the dynamic operation of water can cause that although the decanter decants water from the surface of the tank, the water contains more suspended particles and has larger concentration due to insufficient disturbed static and static sedimentation time of the water in the tank, so that the dosage and treatment pressure in the subsequent flow are increased.

As the conveying of the ground flushing water to the primary sedimentation tank is a dynamic process in the production process, the disturbance of the water in the tank can be caused, and the sedimentation effect is influenced. Because the disturbed dynamic and static settling time of the pool water is not enough, the effluent water contains more suspended particles and has larger concentration, and the dosage and the treatment pressure in the subsequent flow are increased. Therefore, the disturbance problem of the primary settling tank water needs to be solved as much as possible.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can effectively reduce the primary sedimentation tank that is used for waste water treatment of disturbance.

The utility model adopts the technical proposal that:

a primary sedimentation tank for wastewater treatment comprises three tank bodies which are connected in sequence and are respectively called a primary tank, a secondary tank and a tertiary tank, and overflow weirs with the height lower than that of the tank bodies are arranged between the primary tank and the secondary tank and between the secondary tank and the tertiary tank; the overflow pipe is arranged between the primary tank and the secondary tank, penetrates through the overflow weir, then extends downwards, and finally bends and extends, and a plurality of water outlets are formed in the side surface of the overflow pipe close to the overflow weir; and the plurality of water decanters are arranged at the overflow weir between the second-stage pool and the third-stage pool and at the tail end of the third-stage pool, and are used for conveying the wastewater on the surfaces of the second-stage pool and the third-stage pool to the next stage, and water outlets of the water decanters are generally arranged at the bottom of the pool body of the next stage.

Has the advantages that: the first-level pond is used for collecting the coal-containing waste water that each transfer point dredge pump automatic operation was carried, and the disturbance is great, mainly undertakes to collect, deposit large granule suspended solid, needs regularly clear up. The secondary pond is used for the preliminary sedimentation, and the overflow weir plays the effect of prevention, and the water inlet of overflow pipe is less than the upper end of overflow weir a little, plays main overflow effect, and wherein the overflow pipe is when discharging waste water to the secondary pond, and waste water flows out from the bottom and erodees the wall of overflow weir simultaneously, can reduce the disturbance of pond water to the at utmost, guarantees that coal-containing waste water has more abundant time in the secondary pond and stills. And the decanter is connected to convey the wastewater to the third-stage tank, the disturbance of the third-stage tank is lower than that of the second-stage tank, and finally the third-stage tank is conveyed to an external lifting tank.

As an improvement of the scheme, the overflow pipe is sequentially bent to form three sections, the overflow pipe comprises a first horizontal section located at a high position, a vertical section vertically downward and a second horizontal section located at a low position, and L-shaped bends are formed between the first horizontal section and the vertical section and between the vertical section and the second horizontal section. The bend of the overflow pipe can be properly provided with an elbow, but two adjacent sections are vertical as a whole, so that the overflow pipe is convenient to process and saves materials. In other arrangements, the overflow tube may be angled, but it is easy to increase the overall length of the overflow tube, taking up more space by virtue of not being immediately adjacent the weir.

As an improvement of the scheme, a water inlet at the upper end of the overflow pipe is 40cm lower than the upper surface of the primary tank, a water outlet at the lower end of the overflow pipe is 20cm higher than the bottom surface of the primary tank, and a water outlet at the lower end of the overflow pipe is 2-3 cm away from the surface of the overflow weir.

As an improvement of the scheme, the three-stage tank is provided with a maintenance platform, a decanter is arranged on the maintenance platform, and the decanter and the decanters on the three-stage tank both convey the wastewater to the lifting tank.

As an improvement of the scheme, a large tank body is arranged, two overflow weirs are sequentially arranged in the large tank body along the inlet and outlet direction, and the large tank body is divided into a first-stage tank, a second-stage tank and a third-stage tank by the two overflow weirs.

In other schemes, the first-stage tank, the second-stage tank and the third-stage tank are respectively independent small tank bodies, a large tank body is formed after combination, and the wall surface between every two adjacent tank bodies is connected and then used as an overflow weir.

As an improvement of the scheme, the floating assembly and the guide assembly are arranged on the periphery of the decanter, and then the decanter floats up and down by utilizing the buoyancy provided by the liquid level, so that the decanter can continuously drain sewage with the upper part relatively static.

As an improvement of the scheme, a water outlet at the lower end of the decanter is sequentially connected with a telescopic rubber pipe and a fixed pipe, the telescopic rubber pipe is vertically arranged, and one end of the fixed pipe is horizontally penetrated to the next stage after being connected with the telescopic rubber pipe. Because the movable telescopic rubber pipe only needs to move up and down, the problem that the settled coal slime presses the telescopic rubber pipe to interfere the lifting of the decanter is solved. In other schemes, if the telescopic rubber pipe is arranged obliquely, the coal slurry can press the telescopic rubber pipe, so that the water decanter is limited from rising.

As an improvement of the scheme, the floating assembly is a buoy, the guide assembly is a vertical guide rod, and the guide rod penetrates through a circular ring on the decanter.

As an improvement of the scheme, a bracket is arranged above the decanter, a hanging chain is arranged on the bracket and is connected with the decanter to assist in suspending the decanter, and the descending height of the decanter can be controlled by the extending length of the hanging chain. In other schemes, bolts can be arranged at the upper end and the lower end of the guide rod, and the bolts can prevent the circular ring of the decanter from passing through so as to limit the lifting height of the decanter.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a top view of a primary settling tank;

fig. 2 is a sectional view of the primary settling tank.

Detailed Description

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as up, down, front, rear, left, right, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the invention, the meaning of a plurality of the terms is one or more, the meaning of a plurality of the terms is two or more, and the terms larger, smaller, larger, etc. are understood to include no essential numbers, and the terms larger, smaller, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the invention, unless otherwise explicitly defined, terms such as set, mounted, connected and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the invention in combination with the specific contents of the technical solutions.

The utility model relates to a primary sedimentation tank for wastewater treatment.

Referring to fig. 1, it can be seen that a large tank body is divided into three small tank bodies, the three small tank bodies are respectively a primary tank 11, a secondary tank 12 and a tertiary tank 13 from left to right, and two rows of primary settling tanks are arranged side by side in the embodiment from top to bottom. Overflow weirs 21 having a height lower than the tank body are provided between the primary tank 11 and the secondary tank 12 and between the secondary tank 12 and the tertiary tank 13. Waste water drops into one-level pond 11 from the left side, and the lifting pond 80 that discharges to the right side after the processing has a plurality of pumps 93 in the lifting pond 80, intercommunication charge device 91 and sewage treatment jar 92 outside the pump 93. On the right side of the primary tank 11, i.e., on the side away from the wastewater inlet, there is thus an adequate flow path for the wastewater. In addition, a recovered coal treatment area 60 and a drainage ditch 70 are arranged at the side of the primary sedimentation tank, namely, at the lower part of fig. 1, and the length of the recovered coal treatment area 60 extends over three tank bodies, so that the coal slurry 50 is convenient to collect.

In this embodiment, a large tank body is arranged first, and then two overflow weirs 21 are sequentially arranged in the large tank body along the inlet and outlet direction, the overflow weirs 21 block water flow, and the two overflow weirs 21 divide the large tank body into a first-stage tank 11, a second-stage tank 12 and a third-stage tank 13.

The overflow pipe 22 is arranged between the primary tank 11 and the secondary tank 12, the water inlet of the overflow pipe 22 is positioned above the primary tank 11, and the water outlet is positioned below the secondary tank 12. Overflow pipe 22 passes through weir 21 and then extends downward, and finally bends parallel to weir 21, and overflow pipe 22 is provided with a plurality of water outlets on the side near weir 21. The overflow pipe 22 is bent in sequence to form three sections, including a first horizontal section located at a high position, a vertical section vertically downward and a second horizontal section located at a low position, and L-shaped bends are formed between the first horizontal section and the vertical section and between the vertical section and the second horizontal section. In plan view, a first horizontal segment of overflow tube 22 can be seen, which extends in the left-right direction, and a second horizontal segment of overflow tube 22, which extends in the up-down direction. The second horizontal segment of overflow pipe 22 is provided with a plurality of water outlets on the side near overflow weir 21, i.e. the water outlet direction of overflow pipe 22 is towards the left. The water inlet at the upper end of the overflow pipe 22 is 40cm lower than the upper surface of the primary tank 11, the water outlet at the lower end of the overflow pipe 22 is 20cm higher than the bottom surface of the primary tank 11, and the water outlet at the lower end of the overflow pipe 22 is 2-3 cm away from the surface of the overflow weir 21.

One decanter 31 is disposed on the right side of the secondary tank 12 and the other decanter 31 is disposed on the right side of the tertiary tank 13. Since the tertiary tank 13 is also provided with the maintenance platform 40, the decanter 31 is also arranged at the position of the maintenance platform 40. When the decanter 31 is arranged, the floating components and the guide components are arranged around the decanter 31, and then the floating components float up and down by utilizing the buoyancy provided by the liquid level, so that the decanter 31 can continuously drain the sewage with the relatively static upper part.

Referring to fig. 2, the coal slurry 50 is schematically shown in the first-stage tank 11, a water inlet is formed in the upper left corner of the first-stage tank 11, and the coal slurry 50 close to one side of the water inlet is higher in accumulation. Meanwhile, the upper end of the overflow weir 21 is slightly lower than the upper surface of the peripheral side wall of the tank body. The vertical section of overflow tube 22 can be seen in fig. 2.

For the decanter 31, a lower water outlet of the decanter 31 is sequentially connected with a telescopic rubber tube 32 and a fixed tube 33, the telescopic rubber tube 32 is vertically arranged, and one end of the fixed tube 33 is horizontally penetrated to the next stage after being connected with the telescopic rubber tube 32. One end of the fixed pipe 33 connected with the telescopic rubber pipe 32 is tilted upwards and is slightly higher than the possible submerged height of the coal slurry 50. Since the movable telescopic rubber pipe 32 only needs to move up and down, the problem that the settled coal slime 50 presses the telescopic rubber pipe 32 and then interferes with the lifting of the decanter 31 does not exist. This structure is adopted for all three decanters 31 in this embodiment.

In this embodiment, the float assembly is a float, and the guide assembly is a vertical guide rod that passes through a ring on the decanter 31. A bracket 34 is arranged above the decanter 31, a hanging chain is arranged on the bracket 34, the hanging chain is connected with the decanter 31 to assist in suspending the decanter 31, and the descending height of the decanter 31 can be controlled by the extending length of the hanging chain. The hoist chain can be wound on a rotating shaft, and the extension and retraction of the hoist chain are realized by releasing or fixing the rotating shaft.

The first-level pond 11 is used for collecting the coal-containing wastewater conveyed by the sewage pump 93 of each transfer point in an automatic operation mode, has large disturbance, mainly undertakes collection and precipitation of large-particle suspended matters, and needs to be cleaned regularly. Secondary tank 12 is used for preliminary sedimentation, and overflow weir 21 plays the effect of prevention, and overflow pipe 22's water inlet is slightly less than overflow weir 21's upper end, plays main overflow effect, and wherein overflow pipe 22 is when discharging waste water to secondary tank 12, and waste water flows out from the bottom and erodees overflow weir 21's wall simultaneously, can reduce the disturbance of pond water by the at utmost, guarantees that coal-containing waste water has more abundant time stationary sedimentation in secondary tank 12. The decanter 31 is then removed to transfer the waste water to the tertiary tank 13, the tertiary tank 13 will be disturbed less than the secondary tank 12, and finally the tertiary tank 13 will be transferred to the external lift tank 80.

Of course, the design creation is not limited to the above embodiments, and the combination of different features of the above embodiments can also achieve good effects. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope defined by the claims of the present application.

Claims (9)

1. A primary sedimentation tank for wastewater treatment, characterized in that: comprises that

The system comprises three sequentially connected pool bodies, namely a primary pool, a secondary pool and a tertiary pool, wherein overflow weirs with the height lower than that of the pool bodies are arranged between the primary pool and the secondary pool and between the secondary pool and the tertiary pool;

the overflow pipe is arranged between the primary tank and the secondary tank, penetrates through the overflow weir, then extends downwards, and finally bends and extends, and a plurality of water outlets are formed in the side surface of the overflow pipe close to the overflow weir;

and the plurality of water decanters are arranged at the overflow weir between the second-stage tank and the third-stage tank and at the tail end of the third-stage tank and used for conveying the wastewater on the surfaces of the second-stage tank and the third-stage tank to the next stage.

2. The primary sedimentation tank for wastewater treatment according to claim 1, characterized in that: the overflow pipe is bent in sequence to form three sections, the three sections comprise a first horizontal section located at a high position, a vertical section vertically downward and a second horizontal section located at a low position, and L-shaped bending is formed between the first horizontal section and the vertical section and between the vertical section and the second horizontal section.

3. The primary sedimentation tank for wastewater treatment according to claim 2, characterized in that: and a water inlet at the upper end of the overflow pipe is 40cm lower than the upper surface of the primary tank, a water outlet at the lower end of the overflow pipe is 20cm higher than the bottom surface of the primary tank, and a water outlet at the lower end of the overflow pipe is 2-3 cm away from the surface of the overflow weir.

4. The primary sedimentation tank for wastewater treatment according to claim 3, characterized in that: and the three-stage tank is provided with a maintenance platform, and the maintenance platform is provided with a decanter.

5. The primary sedimentation tank for wastewater treatment according to any one of claims 1 to 4, characterized in that: the large pool body is internally provided with two overflow weirs in sequence along the inlet and outlet directions, and the two overflow weirs divide the large pool body into a first-stage pool, a second-stage pool and a third-stage pool.

6. The primary sedimentation tank for wastewater treatment according to any one of claims 1 to 4, characterized in that: the first-stage tank, the second-stage tank and the third-stage tank are respectively independent small tank bodies, and the wall surfaces between every two adjacent tank bodies are connected and then serve as overflow weirs.

7. The primary sedimentation tank for wastewater treatment according to claim 1, characterized in that: the floating assembly and the guide assembly are arranged around the decanter, and then the decanter floats up and down by utilizing the buoyancy provided by the liquid level.

8. The primary sedimentation tank for wastewater treatment according to claim 7, characterized in that: the lower end water outlet of the decanter is sequentially connected with a telescopic rubber pipe and a fixed pipe, the telescopic rubber pipe is vertically arranged, and one end of the fixed pipe is connected with the telescopic rubber pipe and then horizontally penetrates to the next stage.

9. The primary sedimentation tank for wastewater treatment according to claim 8, characterized in that: the floating component is a floating barrel, the guide component is a vertical guide rod, and the guide rod penetrates through a circular ring on the decanter.

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