Fixed weir crest water decanter system

Abstract

The utility model provides a fixed weir crest water decanter system, which relates to the technical field of water treatment and comprises a storage tank shell, a plurality of gates, a plurality of water decanting grids, a partition wall, an opening and closing device, a driver, a liquid level meter, a controller, a drainage pump and a drainage pipe, the partition wall divides the internal space of the regulation and storage tank shell into a regulation and storage tank and a clean water tank; a water inlet pipe is arranged at the upper end part of the storage pond; the liquid level meter is used for measuring the liquid level in the storage tank and sending the liquid level to the controller; each gate is arranged on the partition wall, and a water inlet of each gate is covered by a water decanting grid; each gate is connected with an opening and closing device through a driver, and the opening and closing device is connected with a controller. The first end of the drainage pipe is connected with the drainage pump, and the second end of the drainage pipe extends out of the clean water tank. According to the invention, clear water in the storage tank can be effectively discharged under the condition of high water depth or existence of obstacles underwater.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a fixed weir decanter system. Background Art

[0002] For sequencing batch water treatment facilities, such as SBR sewage treatment process or regulating and sedimentation tank, sewage water is located in the upper layer and muddy water is located in the lower layer. The upper layer of clean water needs to be discharged separately, and as little sludge as possible. This kind of equipment for discharging clean water is called a decanter. Usually the thickness of the clean water layer is 2-3 meters, so the decanting depth of a conventional decanter is generally 2-3 meters, that is, the decanting weir floats up and down within 2-3 meters near the water surface. However, for water depths of 10 meters or more, or when there are obstacles underwater, conventional decanters cannot be used. Summary of the invention

[0003] The object of the present invention is to provide a fixed weir decanter system, which can effectively discharge the clean water in the regulating reservoir in the case of high water depth or underwater obstacles.

[0004] A fixed weir decanter system, comprising: a regulating reservoir shell, a water inlet pipe, a partition wall, a plurality of decanting grids, a plurality of gates, a shutter, a transmission, a liquid level meter, an automatic controller, a drainage pump and a drainage pipe;

[0005] The partition wall divides the internal space of the regulating reservoir shell into a regulating reservoir and a clear water tank;

[0006] The water inlet pipe is arranged at the upper end of the regulating reservoir; the liquid level meter is used to measure the liquid level in the regulating reservoir and send it to the controller; when the liquid level in the regulating reservoir reaches the water inlet level setting value, the controller controls the water inlet pipe to be closed;

[0007] Each of the gates is arranged on the partition wall and is located at different water depths, and the water inlet of each gate is covered by a decanting grid;

[0008] Each of the gates is connected to the shutter through the transmission;

[0009] The drainage pump is arranged at the lower end of the clean water tank, the first end of the drainage pipe is connected to the drainage pump, and the second end of the drainage pipe extends out of the clean water tank;

[0010] The regulating reservoir is used to perform biological treatment on rainwater to obtain clean water, and the opening and closing devices and the transmission devices control the opening and closing of each gate, thereby allowing the clean water to enter the clean water reservoir;

[0011] The controller controls the drainage pump to discharge the clean water out of the clean water tank.

[0012] Optionally, the transmission device is any one of a transmission rod and a rope.

[0013] Optionally, the transmission rod is any one of a rigid cylinder and a rigid circular tube.

[0014] Optionally, the rope is any one of a flexible chain, a steel wire rope and an iron chain.

[0015] Optionally, the gate is a square gate.

[0016] Optionally, the shutter is any one of a manual drive, an electric drive and a pneumatic drive.

[0017] Optionally, the liquid level meter is any one of an ultrasonic liquid level meter and a immersion liquid level meter.

[0018] Optionally, the gates are evenly arranged on the partition wall.

[0019] Optionally, the water inlet of each gate serves as a decanting weir.

[0020] The effects of the present invention are as follows:

[0021] The fixed weir decanter system of the present invention divides the internal space of the regulating reservoir shell into a regulating reservoir and a clean water reservoir by setting a partition wall, and gates are set at different heights of the partition wall. In the case of high water depth or underwater obstacles, the clean water in the regulating reservoir can be effectively discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the fixed weir decanter system of the present invention.

[0023] In the figure: 1. regulating reservoir shell; 101. regulating reservoir; 102. clean water tank; 2. partition wall; 3. liquid level meter; 401. first decanting grid; 402. second decanting grid; 403. third decanting grid; 501. first gate; 502. second gate; 503. third gate; 55. actuator; 66. opener and closeer; 77. controller; 71. drainage pump; 7. drainage pipe. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] Figure 1 1 is a structural diagram of the fixed weir decanter system of the present invention. Figure 1 As shown, the present invention provides a fixed weir decanter system, which includes: a regulating tank shell 1, a plurality of gates, a plurality of decanting grids, a partition wall 2, a shutter 66, a transmission 55, a liquid level meter 3, a controller 77, a drainage pump 71 and a drainage pipe 7.

[0026] The partition wall 2 divides the internal space of the regulating reservoir shell 1 into a regulating reservoir 101 and a clear water reservoir 102 .

[0027] The upper end of the regulating reservoir 101 is provided with a water inlet pipe; the liquid level meter 3 is used to measure the liquid level in the regulating reservoir 101 and send it to the controller 77; when the liquid level in the regulating reservoir 101 reaches the water inlet level setting value, the controller 77 controls the water inlet pipe to close. Optionally, the liquid level meter 3 is any one of an ultrasonic liquid level meter 3 and a immersion liquid level meter 3, preferably an ultrasonic liquid level meter 3.

[0028] Each gate is arranged on the partition wall 2, and the water inlet of each gate is covered by a decanting grid. The water inlet of each gate serves as a decanting weir. Preferably, the gate is a square gate. In this embodiment, there are three gates, which are defined as the first gate 501, the second gate 502 and the third gate 503 from top to bottom. The first gate 501, the second gate 502 and the third gate 503 are evenly arranged at different heights of the partition wall 2. There are three decanting grids, which are defined as the first decanting grid 401, the second decanting grid 402 and the third decanting grid 403. The first decanting grid 401 covers the water inlet of the first gate 501, the second decanting grid 402 covers the water inlet of the second gate 502, and the third decanting grid 403 covers the water inlet of the third gate 503.

[0029] Each gate is connected to the shutter 66 through a transmission 55. Preferably, the transmission 55 is any one of a transmission rod and a rope, and further, the transmission rod is any one of a rigid cylinder and a rigid tube, and the rope is any one of a flexible chain, a wire rope and an iron chain. The shutter 66 is any one of a manual drive, an electric drive and a pneumatic drive. When the shutter 66 is an electric drive or a pneumatic drive, the shutter 66 is connected to the controller 77.

[0030] The drainage pump 71 is disposed at the lower end of the clear water tank 102 , the first end of the drainage pipe 7 is connected to the drainage pump 71 , and the second end of the drainage pipe 7 extends out of the clear water tank 102 .

[0031] The regulating reservoir 101 is used to perform biological treatment on rainwater to obtain clean water. The opening and closing devices 66 and the transmission device 55 control the opening and closing of each gate, thereby allowing the clean water to enter the clean water reservoir 102. The controller 77 controls the drainage pump 71 to discharge the clean water from the clean water reservoir 102.

[0032] The principle of the present invention is as follows:

[0033] Water storage process:

[0034] The gate is in a closed state, and the initial rainwater enters the regulating reservoir 101 through the water inlet pipe. When the liquid level of the regulating reservoir 101 reaches the water inlet level setting value, the controller 77 controls the water inlet pipe to close, and stops the initial rainwater from entering the regulating reservoir 101.

[0035] Water purification:

[0036] First, the biological treatment device installed in the regulating reservoir 101 is started to perform biological treatment on the initial rainwater to decompose pollutants such as COD, ammonia nitrogen, total nitrogen and total phosphorus in the initial rainwater. Then, aluminum salt or iron salt coagulant is added for coagulation and sedimentation treatment to remove total phosphorus and suspended matter.

[0037] Static precipitation:

[0038] When COD, ammonia nitrogen and total nitrogen reach the discharge standard or reuse standard, stop aeration and let it settle for 1-2 hours.

[0039] Decant the water:

[0040] After 1-2 hours of static sedimentation, when the turbidity of the supernatant is less than 1 NTU, clean water is obtained, the shutter 66 is started to drive the actuator 55 to open the first gate 501, and the clean water above the first valve flows into the clean water tank 102 through the first decanting grid 401 and the first gate 501, and the drainage pump 71 is started to discharge the clean water from the clean water tank 102 through the outlet pipe. When the liquid level in the regulating reservoir 101 drops to the position of the second gate 502, the first gate 501 is closed, the second gate 502 is opened, and the clean water above the second gate 502 flows into the clean water tank 102 through the second decanting grid 402 and the second gate 502. When the liquid level in the regulating reservoir 101 drops to the position of the third gate 503, the second gate 502 is closed and the third gate 503 is opened. The clean water above the third gate 503 flows into the clean water reservoir 102 through the third decanting grid 403 and the third gate 503. From then on, all the liquid in the regulating reservoir 101 is discharged.

[0041] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A fixed weir decanter system, characterized in that: It includes: a regulating reservoir shell, a water inlet pipe, a partition wall, a plurality of decanting grids, a plurality of gates, a shutter, a transmission, a liquid level meter, an automatic controller, a drainage pump and a drainage pipe; The partition wall divides the inner space of the regulating reservoir shell into a regulating reservoir and a clear water reservoir; The water inlet pipe is arranged at the upper end of the regulating reservoir; the liquid level meter is used to measure the liquid level in the regulating reservoir and send it to the controller; when the liquid level in the regulating reservoir reaches the water inlet level setting value, the controller controls the water inlet pipe to be closed; Each of the gates is arranged on the partition wall and is located at different water depths, and the water inlet of each gate is covered by a decanting grid; Each of the gates is connected to the shutter through the transmission; The drainage pump is arranged at the lower end of the clean water tank, the first end of the drainage pipe is connected to the drainage pump, and the second end of the drainage pipe extends out of the clean water tank; The regulating reservoir is used to perform biological treatment on rainwater to obtain clean water, and the opening and closing devices and the transmission devices control the opening and closing of each gate, thereby allowing the clean water to enter the clean water reservoir; The controller controls the drainage pump to discharge the clean water out of the clean water tank.

2. The fixed weir decanter system according to claim 1, characterized in that: The transmission device is any one of a transmission rod and a rope.

3. The fixed weir decanter system according to claim 2, characterized in that: The transmission rod is any one of a rigid cylinder and a rigid circular tube.

4. The fixed weir decanter system according to claim 2, characterized in that: The rope is any one of a flexible chain, a steel wire rope and an iron chain.

5. The fixed weir decanter system according to claim 1, characterized in that: The gate is a square gate.

6. The fixed weir decanter system according to claim 1, characterized in that: The shutter is any one of a manual drive, an electric drive and a pneumatic drive.

7. The fixed weir decanter system according to claim 1, characterized in that: The liquid level meter is any one of an ultrasonic liquid level meter and a immersion liquid level meter.

8. The fixed weir decanter system according to claim 1, characterized in that: The gates are evenly arranged on the partition wall.

9. The fixed weir decanter system according to claim 1, characterized in that: The water inlet of each gate serves as a decanting weir.

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