CN214141754U

CN214141754U - Decanting device

Info

Publication number: CN214141754U
Application number: CN202021539294.2U
Authority: CN
Inventors: 杨企星
Original assignee: CORSTAR ENVIRONMENTAL EQUIPMENT SHANGHAI Ltd
Current assignee: CORSTAR ENVIRONMENTAL EQUIPMENT SHANGHAI Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-09-07
Anticipated expiration: 2030-07-29

Abstract

A decanter is provided for draining excess rainwater from a rainwater storage tank and delivering the drained excess rainwater to a downstream treatment process. The decanter comprises: the weir trough assembly is connected with a floating assembly through at least one connecting piece and is provided with a liquid cavity; at least one pump disposed within the liquid chamber of the weir trough assembly to discharge liquid within the liquid chamber of the weir trough assembly; and the water outlet pipe is connected with the water outlet of the pump.

Description

Decanting device

Technical Field

The application relates to the technical field of sewage treatment, in particular to a decanter, which is used for discharging redundant rainwater from a rainwater storage tank and conveying the discharged redundant rainwater to a downstream treatment process.

Background

As communities develop and infrastructure ages, it is often challenging to have an excess of wastewater that exceeds design capacity and overwhelms the treatment system. Excess wastewater can disrupt the intended physical and biochemical treatment process, resulting in release of untreated or poorly treated wastewater into the environment. Excessive wastewater can also have a devastating impact on public health as most wastewater treatment systems are discharged into the same lakes, rivers, streams, and oceans that support people's drinking water, food supply, and entertainment.

There are many sources of excess wastewater that exceed the capacity of the treatment plant. For example, many existing sewer systems are old and dangerous for water to seep into sewer pipes and directly into treatment facilities. In many cases, the sewer may be located in a flooded area, resulting in a large influx of wastewater far exceeding the wastewater flow rate. It is also common for elderly communities to combine domestic sewage with rainwater collection systems. In these systems, the contaminated water is combined with rain water and/or snow melt, resulting in a treatment system that is easily submerged in wet weather conditions.

To prevent catastrophic failure of treatment systems, many existing systems relieve pressure on treatment plants by using combined-sewage overflows (CSOs). The effluent of CSOs is usually short-circuited to the natural water system. However, in other cases, the growth and development of nearby communities can cause problems due to CSOs' outlet connections to existing sewer systems. Likewise, even some dedicated sewer piping systems must include a sanitary-sewage overflow (SSO) to prevent overburdening the treatment system. The overflow pipes of these systems typically bypass normal processing, undergo only preliminary processing before being discharged into our environment, or in some cases are discharged directly without processing.

Most regulatory agencies today prohibit the discharge of untreated wastewater and require treatment systems to perform certain treatment methods. Since it is often impractical to increase the capacity of existing treatment systems to treat these excess effluents, many municipalities have to seek solutions to treat the higher flow rates. One common approach is for the treatment plant to build large storage tanks to collect excess flow received in wet weather, high flow conditions, and to send these excess flows to the treatment system under normal low flow conditions. Unfortunately, these storage tanks can be very large and take up valuable land area and can only be used for days or weeks per year. An emerging and popular treatment is to reduce the size of stormwater retention basins by using specialized filtration systems to handle the dilute excess flow.

To solve the above problems, an emerging and popular treatment method is to reduce the size of the rainwater storage by using a special filtering system to treat the diluted surplus flow. One example of such specialized filtration technology is the cloth media filtration system manufactured by Aqua-Aerobic Systems, inc. In these techniques, water must be drained from the storage tank and delivered to a filtration system or similar system by using a pump, typically located at the bottom of the tank or in the tank.

However, conventional pumps have a significant limitation in that they can draw in and transport deposits together to downstream processing. In addition, the conventional pump may suck and transfer substances such as scum, fat, oil or grease floating on the water surface to the downstream process together, thereby causing a problem of clogging the downstream process.

Therefore, there is a need in the industry for a device that can safely remove wastewater from a storage tank without absorbing surface floaters or sediments to avoid interfering with downstream processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a decanter is provided, the device can carry out effective operation at the different work liquid levels in the rainwater regulation pond, both prevent to inhale the material that floats harmfully in low reaches processing technology such as dross or the foam of the liquid surface in rainwater regulation pond, prevent again to inhale and subside in the material harmfully in low reaches processing technology such as silt of rainwater regulation pond bottom to reach the unnecessary rainwater of discharging and carry the unnecessary rainwater of discharging to a downstream processing technology's technological effect.

In order to solve the above problems, according to an aspect of the present invention, there is provided a decanter for discharging excess rainwater from a rainwater storage tank and transferring the discharged excess rainwater to a downstream treatment process. The decanter comprises: the weir trough assembly is connected with a floating assembly through at least one connecting piece and is provided with a liquid cavity; at least one pump disposed within the liquid chamber of the weir trough assembly to discharge liquid within the liquid chamber of the weir trough assembly; and the water outlet pipe is connected with the water outlet of the pump.

In some embodiments, a first end of the outlet pipe is pivotally connected to the float assembly, a second end of the outlet pipe is pivotally connected to a wall of the rainwater storage tank, and the first end of the outlet pipe is connected to the outlet of the pump through a connection pipe.

In some embodiments, the first end of the outlet pipe is provided with a first pivot mount, the float assembly is provided with a first receiving mount, and the first pivot mount cooperates with the first receiving mount to pivotally connect the first end of the outlet pipe to the float assembly.

In some embodiments, the second end of the outlet pipe is provided with a second pivot support, and the second pivot support is matched with a second receiving support arranged on the wall of the rainwater storage tank, so that the second end of the outlet pipe is pivotally connected with the wall of the rainwater storage tank.

In some embodiments, the outlet tube is provided with a draft tube near the second end to deliver liquid within the outlet tube to a downstream process.

In some embodiments, the outlet pipe is a rigid pipe.

In some embodiments, at least one carrier is disposed within the liquid chamber of the weir trough assembly, the pump being placed on the carrier such that the water inlet of the pump is in fluid communication with the liquid chamber.

In some embodiments, the floating assembly has an open area through which the connecting tube passes to connect the outlet of the pump with the first end of the outlet tube.

In some embodiments, the float assembly has a housing defining an interior cavity filled with a buoyant material.

In some embodiments, the material of the housing is stainless steel, fiberglass, or plastic.

In some embodiments, the buoyant material is a low density foam.

In some embodiments, the distance between the first surface of the liquid chamber of the weir trough assembly and the second surface of the float assembly is 6-12 centimeters.

In some embodiments, the decanter further comprises at least one connecting rod, a first end of the connecting rod being pivotally connected to the float assembly, and a second end of the connecting rod being connected to the rainwater storage tank. Is pivotally connected to the pool wall.

In some embodiments, the first end of the connecting rod is provided with a first pivot bracket, the floating assembly is provided with a first receiving bracket, and the first pivot bracket cooperates with the first receiving bracket to pivotally connect the first end of the connecting rod to the floating assembly.

In some embodiments, the second end of the connecting rod is provided with a second pivot bracket which cooperates with a second receiving bracket provided on the wall of the rainwater storage tank to pivotally connect the second end of the connecting rod to the wall of the rainwater storage tank.

In some embodiments, the decanter further comprises at least one restraining cable having one end fixedly connected to the float assembly and another end fixedly connected to a tank wall of the rainwater storage tank, such that the decanter moves within the rainwater storage tank only in a vertical direction.

In some embodiments, the pump is a submersible pump.

In the application, through the structural arrangement of the floating assembly and the weir trough assembly, the decanter can directly pump redundant liquid from the position below the liquid level of the rainwater storage tank through the pump, smoothly discharge the rainwater storage tank through the water outlet pipe and convey the rainwater storage tank to a downstream treatment process, so that substances harmful to the downstream treatment process, such as scum or foam floating on the surface of the liquid level of the rainwater storage tank, are prevented from entering the downstream treatment process. In addition, the decanter can simultaneously avoid sucking sediment and other substances harmful to a downstream treatment process, such as silt and the like settled at the bottom of the rainwater storage tank, into the downstream treatment process through the arrangement of the weir trough assembly.

Drawings

FIG. 1 is a schematic view of the internal structure of a decanter according to one embodiment of the present application;

FIG. 2 is a top view of the decanter of FIG. 1;

fig. 3 is a schematic view of the internal structure of a decanter according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1 and 2, the present application relates to a decanter 10. The decanter 10 may be disposed in a rainwater storage tank 200 for discharging excess rainwater in the rainwater storage tank 200 and delivering the discharged excess rainwater to a downstream treatment process.

As shown in fig. 1 and 2, the decanter 10 includes: a floating assembly 110, a weir trough assembly 120, at least one pump 130, and an outlet pipe 140.

As shown in fig. 1, the floating assembly 110 has a housing 111, and the housing 111 encloses a closed inner cavity filled with a buoyancy material 112. The shell 111 is made of stainless steel, fiberglass or plastic, and the buoyancy material is low-density foam. As shown in fig. 1, the floating assembly has an open area 110A for coupling an external component (e.g., a power line or external piping of the pump 130) to the pump 130. Also, the liquid level can be observed through the annular region 110A. The shape of the float assembly 110 and the open area 110A may be any shape, such as, but not limited to, circular and rectangular, and both may not necessarily be the same shape. For example, the shape of the floating assembly 110 shown in fig. 2 is circular, and the shape of the open area 110A is also circular. It will be appreciated by those skilled in the art that the shape of the floating assembly 110 may be circular, while the shape of the open area 110A is rectangular.

As shown in fig. 1, the weir trough assembly 120 is connected to the floating assembly 110 by at least one connection member 122, and the weir trough assembly 120 has a liquid chamber 121. As shown in fig. 1, the connection 122 is configured to: the weir trough assembly 120 is connected to the floating assembly 110 such that a distance D between a first surface 121A of the liquid chamber 121 of the weir trough assembly 120 (i.e., an upper surface of the liquid chamber 121 in fig. 1) and a second surface 111B of the shell 111 of the floating assembly 110 (i.e., a lower surface of the shell 111 in fig. 1) is maintained to be 6-12 cm.

As shown in fig. 1, at least one carrier 123 is disposed in the liquid chamber 121, and the pump 130 is placed on the carrier 123. Thus, as shown in fig. 1, the carrier 123 forms an inlet region 123A within the liquid chamber 121 for the pump 130 to intake water such that the inlet 131 of the pump 130 is in fluid communication with the liquid chamber 121 through the inlet region 123A.

Thus, as shown in fig. 1, when the decanter 10 is disposed in the rainwater storage tank 200, the floating assembly 110 and the weir trough assembly 120 are configured to: (i) the first surface 111A of the housing 111 of the floating assembly 110 floats on the liquid surface S; (ii) the second surface 111B of the housing 111 of the float assembly 110 is submerged below the liquid level S; and, (iii) the liquid chamber 121 of the weir trough assembly 120 is completely submerged below the liquid level S. In this configuration, when the pump 130 starts to suck liquid, the liquid sucked by the pump 130 is the liquid below the second surface 111B of the shell 111 and in the liquid cavity 121 under the liquid level S due to the arrangement of the liquid cavity 121 and the water inlet area 123A of the weir trough assembly 120. The direction of flow of liquid below the liquid level S is indicated by the arrows in fig. 1.

Therefore, the decanter 10 of the present application can accurately suck up the liquid below the liquid surface S by the pump 130 to avoid sucking in substances floating on the liquid surface S, such as scum or foam, which may impair the processing capacity of the downstream processing process. Simultaneously, the setting of weir trough subassembly 120 can also avoid simultaneously inhaling the material that subsides in the bottom of rainwater regulation pond 200 can harm downstream processing technology's throughput, like silt etc..

Further, as shown in fig. 1 and 2, a first pivot bracket 141 is provided at the first end of the outlet pipe 140, and accordingly, a first receiving bracket 113 which is matched with the first pivot bracket 141 is provided on the floating assembly 110, so that the first end of the outlet pipe 140 is pivotally connected to the floating assembly 110 by the first pivot bracket 141 and the first receiving bracket 113 which are coupled to each other. Similarly, a second pivot bracket 142 is provided at the second end of the outlet pipe 140, and accordingly, a second receiving bracket 210 is provided on the wall of the rainwater storage tank 200 to cooperate with the second pivot bracket 142, so that the pivotal connection of the second end of the outlet pipe 140 with the wall of the rainwater storage tank 200 is achieved by the second pivot bracket 142 and the second receiving bracket 210 being coupled to each other.

Through the above arrangement of the outlet pipe 140, the decanter 10 can move relative to the rainwater storage tank 200 mainly in the vertical direction as the liquid level S floats up and down, so as to always maintain: (i) the first surface 111A of the housing 111 of the floating assembly 110 floats on the liquid surface S; (ii) the second surface 111B of the housing 111 of the float assembly 110 is submerged below the liquid level S; and, (iii) the liquid chamber 121 of the weir trough assembly 120 is completely submerged below the liquid level S.

In this embodiment, further, the first end of the water outlet pipe 140 is connected to the water outlet 132 of the pump 130 through a connection pipe 150. And the second end of the outlet pipe 140 is provided with a drainage pipe 160 to convey the liquid in the outlet pipe 140 to a downstream treatment process.

Therefore, in the present embodiment, when the pump 130 is activated to start sucking in liquid, the liquid can smoothly enter the outlet pipe 140 through the connection pipe 150 and then be delivered to a downstream process through the draft tube 160. The connection pipe 150 and the drainage pipe 160 are flexible pipes made of a material known in the art, so that the liquid sucked by the pump 130 can be smoothly discharged out of the rainwater storage tank 200 through the connection pipe 150, the water outlet pipe 140 and the drainage pipe 160 and be transferred to a downstream process while the water outlet pipe 140 is moved relative to the rainwater storage tank 200 mainly in a vertical direction as the liquid level S floats up and down.

Furthermore, in this embodiment, in order to further fix the position of the decanter 10 in the rainwater storage tank 200, as shown in fig. 2, the decanter 10 further includes at least one limit cable 170. The decanter 10 is shown in fig. 2 to include two stop cables 170, and those skilled in the art will appreciate that the number of stop cables 170 can be increased or decreased as desired. As shown in fig. 2, one end of the restraining cable 170 is fixedly connected to the floating assembly 110, the other end of the restraining cable 170 is fixedly connected to the wall of the rainwater storage tank 200, and the restraining cable 170 is disposed coplanar with the outlet pipe 140. With this arrangement, the decanter 10 shown in fig. 1 floats only in the vertical direction within the rainwater storage tank 200 as the liquid level S changes. And, by recovering the limit cable 170, the decanter 10 can be recovered from the side of the rainwater storage tank 200 to perform maintenance on the decanter 10.

Preferably, in this embodiment, a plurality of access rings 180 may be further disposed on the outer circumferential surface of the outlet pipe 140, and the access rings 180 are used for fixing the electric wires 133 of the pump 130 to the outlet pipe 140, so that the pump 130 can be powered by connecting the electric wires 133 to an external power source.

It will be appreciated by those skilled in the art that in this embodiment, the outlet pipe 140 serves both as a drain line for draining liquid and as a means of pivotally connecting the decanter 10 to the rain water reservoir 26 to maintain the position of the decanter 10 in liquid. Therefore, in this embodiment, the outlet pipe 140 is preferably a rigid pipe.

As an alternative, in another embodiment, the outlet pipe 140 may simply assume the function of a drain line for draining liquid, and need not necessarily be provided in pivotal connection with the float assembly 110 and the wall of the stormwater reservoir 26.

In particular, as shown in fig. 3, in another embodiment, the decanter 10 further comprises at least one connecting rod 190, a first pivot bracket 191 is provided at a first end of the connecting rod 190, and accordingly, a first receiving bracket 113 is provided on the floating assembly 110 to cooperate with the first pivot bracket 191, such that the pivotal connection of the first end of the connecting rod 190 to the floating assembly 110 is achieved by the first pivot bracket 191 and the first receiving bracket 113 being coupled to each other. Similarly, a second pivot bracket 192 is provided at the second end of the connecting rod 190, and accordingly, a second receiving bracket 210 is provided on the wall of the rainwater storage tank 200 to be matched with the second pivot bracket 192, so that the pivotal connection of the second end of the connecting rod 190 with the wall of the rainwater storage tank 200 is achieved by the second pivot bracket 192 and the second receiving bracket 210 being coupled to each other.

In the decanter 10 of fig. 3, the connecting rod 190 is a rigid rod that functions to pivotally connect the decanter 10 to the rain reservoir 26 to maintain the position of the decanter 10 in a liquid. In the decanter 10 of fig. 3, the outlet pipe 140 is a flexible pipe and is fixed to the connecting rod 190 by the coupling ring 180 together with the electric wire 133 of the pump 130.

Therefore, in the decanter of fig. 3, it is ensured by the connecting rod 190 that the decanter 10 can move mainly in the vertical direction relative to the rainwater storage tank 200 as the liquid surface S floats up and down, while the liquid sucked by the pump 130 is smoothly discharged out of the rainwater storage tank 200 through the water outlet pipe 140 directly connected to the water outlet 132 of the pump 130 and is conveyed to a downstream treatment process.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A decanter for draining excess rainwater from a rainwater storage tank and delivering the drained excess rainwater to a downstream treatment process, the decanter comprising:

the weir trough assembly is connected with a floating assembly through at least one connecting piece and is provided with a liquid cavity;

at least one pump disposed within the liquid chamber of the weir trough assembly to discharge liquid within the liquid chamber of the weir trough assembly; and the number of the first and second groups,

and the water outlet pipe is connected with the water outlet of the pump.

2. The decanter of claim 1 wherein a first end of said outlet pipe is pivotally connected to said float assembly, a second end of said outlet pipe is pivotally connected to a wall of said rainwater storage tank, and said first end of said outlet pipe is connected to a water outlet of said pump by a connecting pipe.

3. The decanter of claim 2 wherein said first end of said outlet pipe is provided with a first pivot bracket, said float assembly is provided with a first receiving bracket, and said first pivot bracket cooperates with said first receiving bracket to pivotally connect said first end of said outlet pipe to said float assembly.

4. The decanter of claim 2 wherein said second end of said outlet pipe is provided with a second pivot bracket, said second pivot bracket cooperating with a second receiving bracket provided on said wall of said rainwater storage tank to pivotally connect said second end of said outlet pipe to said wall of said rainwater storage tank.

5. The decanter of claim 2 wherein said outlet pipe is provided with a draft tube adjacent said second end for conveying liquid in said outlet pipe to a downstream process.

6. The decanter of any one of claims 2 to 5 wherein said outlet pipe is a rigid pipe.

7. The decanter of claim 1 wherein at least one carrier is disposed within said liquid chamber of said weir trough assembly, said pump being positioned on said carrier such that an inlet of said pump is in fluid communication with said liquid chamber.

8. The decanter of claim 2 wherein said float assembly has an open area through which said connecting tube passes to connect said pump outlet to said first end of said outlet tube.

9. The decanter of claim 7 wherein said float assembly has a housing, said housing defining an interior cavity, said interior cavity filled with a buoyant material.

10. The decanter of claim 9 wherein said housing is made of stainless steel, fiberglass or plastic.

11. The decanter of claim 1 wherein said first surface of said liquid chamber of said weir trough assembly is spaced 6-12 cm from said second surface of said float assembly.

12. The decanter of claim 1 further comprising at least one connecting rod, a first end of said connecting rod pivotally connected to said float assembly and a second end of said connecting rod pivotally connected to a tank wall of said rain reservoir.

13. The decanter of claim 12 wherein said first end of said connecting rod is provided with a first pivot bracket, said float assembly is provided with a first receiving bracket, and said first pivot bracket cooperates with said first receiving bracket to pivotally connect said first end of said connecting rod to said float assembly.

14. The decanter of claim 12 wherein said second end of said connecting rod is provided with a second pivot bracket, said second pivot bracket cooperating with a second receiving bracket provided on said wall of said rainwater storage tank to pivotally connect said second end of said connecting rod to said wall of said rainwater storage tank.

15. The decanter of claim 1 further comprising at least one restraining cable having one end fixedly connected to said float assembly and another end fixedly connected to a wall of said rainwater storage tank so that said decanter moves only in a vertical direction within said rainwater storage tank.