Multistage sedimentation tank applied to muddy water

Abstract

The utility model discloses a multistage sedimentation tank applied to muddy water, which comprises a sedimentation tank, a plurality of retaining walls are arranged in the sedimentation tank, the plurality of retaining walls divide the sedimentation tank into a plurality of sedimentation areas, the plurality of retaining walls are arranged from high to low, a first aeration pipe is arranged in the sedimentation area, and a second aeration pipe is arranged in the sedimentation area. Wherein a settling tank is installed in the settling area located on the high retaining wall, a muddy water inlet is formed in one side of the settling tank, a settling plate is arranged in the settling tank, an overflow port is formed in the side, away from the muddy water inlet, of the settling tank, a second aeration pipe is arranged in the settling tank, and mud pumping devices are further arranged in the settling pond and the settling tank. The sand washing muddy water treatment device can improve the sand washing muddy water treatment efficiency, is small in occupied area, can quickly and efficiently clean the muddy sand when the muddy water is precipitated to a certain thickness, is high in efficiency and low in input cost, does not need other equipment for assistance, and can automatically finish the cleaning work.

Description

Technical Field

[0001] This utility model relates to the field of sand washing technology, and in particular to a multi-stage sedimentation tank for turbid water. Background Technology

[0002] Quartz sand, due to its good fluidity and high compressive strength, is one of the important fracturing proppant materials in the oil extraction process, accounting for about 80% of the market share and occupying a dominant position. Moreover, quartz sand has high reserves and low cost, which can provide sufficient raw material security. The main production process of quartz sand is the water washing process. Since natural quartz sand contains a large amount of ultrafine sand and soil, the washed natural sand can be used as different fracturing proppants after screening.

[0003] The water used for sand washing can be reused after sedimentation, which is a major way to reduce water consumption. The turbid water after sand washing is characterized by rapid sedimentation and a large amount of mud and sand. Generally, it can be reused after multi-stage sedimentation. At present, multi-stage sedimentation tanks are mainly used for sedimentation treatment. Due to the large amount of mud and sand in the turbid water, a large amount of mud and sand can accumulate in the sedimentation tank in a short time, especially in the first-stage sedimentation tank, where the sedimentation speed is relatively fast. When operating at full capacity, the first-stage sedimentation tank can be filled in a few days. Therefore, the construction size of the first-stage sedimentation tank is also relatively large. Moreover, the sedimented mud and sand are difficult to clean. Since mud and sand do not have good fluidity like silt, they are difficult to clean even with sludge pumps. Generally, they are cleaned by excavators and loaders, which further increases the cost of turbid water treatment. To address these problems, we propose a multi-stage sedimentation tank for turbid water. Utility Model Content

[0004] This application provides a multi-stage sedimentation tank for turbid water, which solves the problems of large amount of silt, large amount of sediment, and difficulty in treatment when washing turbid water with quartz sand.

[0005] This application provides a multi-stage sedimentation tank for turbid water, including a sedimentation tank with multiple baffles that divide the sedimentation tank into multiple sedimentation zones, arranged from high to low. Each sedimentation zone has a first aeration pipe. A sedimentation tank is installed in the sedimentation zone located at the highest baffle. A turbid water inlet is provided on one side of the sedimentation tank. A settling plate is provided inside the sedimentation tank. An overflow outlet is provided on the side of the sedimentation tank away from the turbid water inlet. A second aeration pipe is provided inside the sedimentation tank. A sludge removal device is also provided in the sedimentation tank and the sedimentation tank.

[0006] Preferably, the sludge pumping device includes a sludge pump installed on one side of the sedimentation tank, and branch pipes are provided in both the sedimentation tank and the sedimentation zone, with the branch pipes connected to the sludge pump via sludge pipes.

[0007] Preferably, a sedimentation tank is provided at the bottom of the sedimentation tank on the side near the turbid water inlet, and the branch pipe extends into the sedimentation tank.

[0008] Preferably, a baffle is fixed inside the sedimentation tank, and the baffle is located above the sedimentation tank.

[0009] Preferably, a weir plate is also fixed to the side of the retaining wall facing the sedimentation tank, and one end of the weir plate is inclined downward.

[0010] Preferably, multiple water outlet pipes are provided on the side of the sedimentation zone away from the sedimentation tank, and multiple water outlet pipes are connected to a water supply pipe.

[0011] Preferably, the aeration ports of the first aeration pipe and the second aeration pipe are inclined downwards.

[0012] Preferably, the settlement plate is bent.

[0013] Preferably, there are three precipitation zones.

[0014] As can be seen from the above technical solution, this application provides a multi-stage sedimentation tank for turbid water. In use, the turbid water outlet of the sand washing system is connected to the turbid water inlet of this application, so that the turbid water from the sand washing system slowly flows into the sedimentation tank through the turbid water inlet. After partial sedimentation in the sedimentation tank, it flows out of the first-stage sedimentation zone in the sedimentation tank through the overflow outlet, and then flows to the next sedimentation zone through overflow. After sedimentation in the last sedimentation zone, it is sent to the sand washing workshop as washing water for sand washing. When there is a lot of sediment at the bottom of the sedimentation tank or sedimentation zone, the aeration pipe can be activated to flush the bottom of the sedimentation zone and sedimentation tank, flushing the bottom sediment sludge and sand to a flowing state, and then pumping it to the sludge discharge point for treatment through the sludge pumping device. After the flushing is completed, a short sedimentation is allowed before reuse.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By setting up a sedimentation tank, a sedimentation tank is added to the multi-stage sedimentation. The sedimentation tank is designed to be long and narrow. During the flow of turbid water, it can perform preliminary sedimentation of sand and gravel with good sedimentation effect. Then, it enters the sedimentation tank for multi-stage sedimentation, which can effectively reduce the mud and sand content in the sedimentation tank. Due to the small volume of the sedimentation tank, it is convenient to clean the mud and sand sediment.

[0017] 2. Through the setting of multiple baffles, the turbid water undergoes sedimentation in the sedimentation tank step by step, resulting in good sedimentation effect and high efficiency, and the cleaning water can be quickly treated and reused.

[0018] 3. By installing aeration pipes, the mud and sand can be diluted after accumulating to a certain thickness, improving their fluidity and facilitating the treatment of the settled mud and sand, which can then be discharged through sludge removal equipment.

[0019] In summary, this application can improve the treatment efficiency of turbid water from sand washing, and occupies a small area. When sediment reaches a certain thickness, it can quickly and efficiently clean the mud and sand. It is not only highly efficient and low in investment cost, but also does not require other equipment to assist in the cleaning work and can complete the cleaning work automatically. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the external structure of a multi-stage sedimentation tank for turbid water proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of a multi-stage sedimentation tank for turbid water proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the first cross-section of a multi-stage sedimentation tank for turbid water proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the second cross-section of a multi-stage sedimentation tank for turbid water proposed in this utility model.

[0025] In the diagram: 1 sedimentation tank, 2 turbid water inlet, 3 sludge pump, 4 settling plate, 5 sedimentation box, 6 overflow outlet, 7 sludge pipe, 8 branch pipe, 9 retaining wall, 10 weir plate, 11 effluent pipe, 12 water supply pipe, 13 first aeration pipe, 14 baffle, 15 second aeration pipe, 16 sedimentation tank. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] See Figure 1-4This application discloses a multi-stage sedimentation tank for treating turbid water used in sand washing. Specifically, it includes a sedimentation tank 1, which is a one-piece structure with waterproofing. Multiple baffles 9 are installed within the sedimentation tank 1, dividing it into multiple sedimentation zones for multi-stage sedimentation. Specifically, there can be three sedimentation zones to meet the requirements for sand washing water. The baffles 9 are arranged from high to low. In this application, sedimentation between the sedimentation zones occurs through overflow. When the sedimentation in each zone reaches a certain concentration... A first aeration pipe 13 is installed in the sedimentation zone. Flowing water is pumped into the sedimentation zone to give the sediment a certain degree of fluidity, facilitating its discharge. To reduce sediment accumulation, a sedimentation tank 5 is installed within the sedimentation zone located on the high retaining wall 9. The sedimentation tank 5 is installed at the edge of the first-stage sedimentation zone and has a slender structure to increase the time the turbid water spends in it, thus retaining most of the sediment. The depth of the sedimentation tank 5 is also less than the depth of the sedimentation zone, facilitating rapid cleaning. By extending the outflow time of turbid water, the size of the sedimentation tank 1 can be further reduced, while still achieving the purpose of treating turbid water. Specifically, a turbid water inlet 2 is provided on one side of the sedimentation tank 5, through which turbid water flows into the sedimentation tank. A settling plate 4 is provided inside the sedimentation tank 5. The settling plate 4 increases the resistance to water flow, which can accelerate the sedimentation process. The settling plate 4 is bent to provide attachment points for sediment, further accelerating sedimentation. An overflow outlet 6 is provided on the side of the sedimentation tank 5 away from the turbid water inlet 2. Turbid water enters from one end of the sedimentation tank 5 and flows out from the other end. After a certain period of time, most of the mud and sand can be settled in the sedimentation tank 5. The turbid water with reduced mud and sand content then slowly enters the sedimentation tank 1 through the overflow port 6. The sedimentation tank 5 is equipped with a second aeration pipe 15. When the sediment in the sedimentation tank 5 reaches a certain thickness, it is flushed through the aeration pipe to improve the fluidity of the mud and sand, making it easier to discharge. The sedimentation tank 1 and sedimentation tank 5 are also equipped with a sludge pumping device. The sludge is discharged to the sludge treatment area through the sludge pumping device, which quickly completes the sludge treatment of this application, allowing this application to be put back into use quickly.

[0028] In this utility model, the sludge pumping device includes a sludge pump 3 installed on one side of the sedimentation tank 1, and branch pipes 8 are provided in the sedimentation tank 5 and the sedimentation zone. Each branch pipe 8 controls a sedimentation zone and a sedimentation tank 5. It should be understood that each branch pipe 8 is equipped with a valve to control the connection of each branch pipe 8. The branch pipe 8 is connected to the sludge pump 3 through a sludge pipe 7, and each branch pipe 8 discharges sludge through the sludge pipe 7 and the sludge pump 3.

[0029] In this utility model, in order to improve the sedimentation efficiency of the sedimentation tank 5, that is, to extend the sedimentation time, it was observed that the sedimentation volume was large on the side of the sedimentation tank 5 near the turbid water inlet 2. Therefore, a sedimentation trough 16 is provided at the bottom of the side of the sedimentation tank 5 near the turbid water inlet 2 to reduce the sedimentation height in the sedimentation tank 5 and extend the service time of the sedimentation tank 5. The branch pipe 8 extends into the sedimentation trough 16 and is extracted from the sedimentation trough 16 when pumping mud.

[0030] Furthermore, a baffle 14 is fixed inside the sedimentation tank 5. The baffle 14 is located above the sedimentation tank 16. When turbid water flows into the sedimentation tank 5, it passes through the bottom of the baffle 14, which slows down the flow rate of the water. When the turbid water turns after passing through the baffle 14, some mud and sand will also settle to the bottom of the sedimentation tank 16, thus improving the sedimentation effect.

[0031] In this invention, in order to improve the sedimentation effect, a weir plate 10 is fixed on the side of the baffle facing the sedimentation tank 5. When water needs to overflow from one sedimentation zone to another, it needs to cross the weir plate 10. One end of the weir plate 10 is inclined downwards, so that only the uppermost clear liquid overflows from the sedimentation zone, and the bottom needs to cross the weir plate 10 to flow out. In the process of crossing the weir plate 10, the flow direction needs to be changed to reduce the flow rate, which will improve the sedimentation effect and make the water that flows out the upper layer of water with better water quality.

[0032] In this utility model, when the settled water needs to be reused, multiple water outlet pipes 11 are provided on the side of the sedimentation area away from the sedimentation tank 5. The water is discharged from the water outlet pipe 11 of the reused water well. Multiple water outlet pipes 11 are connected to a water supply pipe 12, which is then pumped to the sand washing workshop for sand washing.

[0033] In this invention, the aeration ports of the first aeration pipe 13 and the second aeration pipe 15 are inclined downwards. When cleaning the sedimented mud and sand, high-pressure water is sprayed onto the ground to blow up the mud and sand on the ground. Then the water impacts upwards through the ground, thereby washing the entire sedimentation area clean, which enhances the fluidity of the mud and sand, making it easier to discharge.

[0034] As can be seen from the above technical solution, when using this application, the turbid water outlet of the sand washing system is connected to the turbid water inlet 2 of this application, so that the turbid water of the sand washing slowly flows through the turbid water inlet 2 into the sedimentation tank 5. After partial sedimentation in the sedimentation tank 5, it flows out of the primary sedimentation zone in the sedimentation tank 1 through the overflow outlet 6, and then flows to the next sedimentation zone by overflow. After sedimentation in the last sedimentation zone, it is sent to the sand washing workshop as washing water for sand washing. When there is a lot of sediment at the bottom of the sedimentation tank 5 or the sedimentation zone, the aeration pipe can be started to flush the sedimentation zone and the bottom of the sedimentation tank 5, flushing the bottom sedimented mud and sand to a flowing state, and then pumping it to the sludge discharge point for treatment through the sludge pumping device. After the flushing is completed, a short sedimentation is allowed before reuse.

[0035] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0036] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A multi-stage sedimentation basin applied to turbid water, comprising a sedimentation basin (1), characterized in that: The sedimentation tank (1) is provided with a plurality of retaining walls (9), the plurality of retaining walls (9) separate the sedimentation tank (1) into a plurality of sedimentation zones, and the plurality of retaining walls (9) are arranged from high to low, the first aeration pipe (13) is arranged in the sedimentation zone, the sedimentation tank (5) is arranged in the sedimentation zone of the high retaining wall (9), the turbid water inlet (2) is arranged on one side of the sedimentation tank (5), the sedimentation plate (4) is arranged in the sedimentation tank (5), the overflow port (6) is arranged on the side of the sedimentation tank (5) away from the turbid water inlet (2), the second aeration pipe (15) is arranged in the sedimentation tank (5), and the sedimentation tank (1) and the sedimentation tank (5) are further provided with a mud pumping device.

2. The multi-stage sedimentation tank for turbid water according to claim 1, wherein The mud pumping device comprises a sludge pump (3) arranged on one side of the sedimentation tank (1), the sedimentation tank (5) and the sedimentation zone are provided with branch pipes (8), and the branch pipes (8) are connected with the sludge pump (3) through sludge pipes (7).

3. The multi-stage sedimentation tank for turbid water according to claim 2, wherein The sedimentation tank (5) is provided with a sedimentation tank (16) on the bottom of the side close to the turbid water inlet (2).

4. The multi-stage sedimentation tank for turbid water according to claim 3, wherein The sedimentation tank (5) is provided with a sedimentation tank (16) on the bottom of the side close to the turbid water inlet (2).

5. The multi-stage sedimentation tank for turbid water according to claim 1, wherein The retaining wall is further provided with a weir plate (10) on the side facing the sedimentation tank (5), and one end of the weir plate (10) is inclined downward.

6. The multi-stage sedimentation tank for turbid water according to claim 1, wherein A plurality of water outlet pipes (11) are arranged on the side of the sedimentation zone away from the sedimentation tank (5), and the plurality of water outlet pipes (11) are commonly provided with a water supply pipe (12).

7. The multi-stage sedimentation tank for turbid water according to claim 1, wherein The aeration ports of the first aeration pipe (13) and the second aeration pipe (15) are inclined downward.

8. The multi-stage sedimentation tank for turbid water according to claim 1, wherein The sedimentation plate (4) is arranged in a bent manner.

9. The multi-stage sedimentation tank for turbid water according to claim 1, wherein The sedimentation zone is three.

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