Concrete production wastewater air flotation tank with automatic water level adjusting function

Abstract

The utility model discloses a concrete production wastewater air floatation tank with automatic water level adjusting function, and the device comprises a tank body, a water inlet pipe is arranged at the lower part of the tank body, an overflow groove is arranged at one side of the upper part of the tank body, a liquid level monitoring groove is arranged at the other side of the upper part of the tank body, and a scraper is arranged on the tank body, a floating plate with a floating block is arranged in the overflow groove, a baffle is arranged at one side of the floating plate, the baffle is attached to the side wall of the overflow groove and blocks the water outlet on the side wall, and the device is also provided with guiding, sealing and cleaning components. The device can automatically adapt to the fluctuation of the discharge amount of the concrete production wastewater, stably maintain the water level in the tank through the cooperation of the floating plate and the baffle, ensure that the scraper efficiently scrapes off the floating dregs containing cement particles, facilitate the cleaning of the residues and the blocking of the large impurities, reduce manual intervention, improve the wastewater treatment efficiency and the raw material recovery effect, and be suitable for the treatment of the concrete production wastewater.

Description

Technical Field

[0001] This utility model relates to the field of concrete production technology, specifically a concrete production wastewater flotation tank with automatic water level regulation function. Background Technology

[0002] The concrete production process generates a large amount of wastewater containing suspended solids such as cement particles, sand and gravel, and fly ash. Direct discharge of this wastewater would cause serious pollution, and its effective components would not be recovered. As a key piece of equipment for treating this type of wastewater, the dissolved air flotation (DAF) tank uses a large number of microbubbles to capture and adsorb fine particles and adhesives in the wastewater, causing these substances to float to the surface and form scum, which is then scraped off by a scraper device, achieving solid-liquid separation.

[0003] However, the discharge volume of concrete production wastewater fluctuates significantly, leading to substantial changes in the water level of the dissolved air flotation (DAF) tank. When the water level drops, the scrapers cannot effectively contact the scum layer, resulting in incomplete removal of cement residue and other scum, which then sinks back to the bottom of the tank, causing secondary pollution. Conversely, when the water level is too high, scum easily overflows with the wastewater, affecting the treatment effect. Traditional DAF tanks rely on frequent manual adjustments to the drainage rate to maintain a stable water level. However, the scum from concrete production wastewater is highly viscous and prone to caking. Untimely manual adjustments can cause scrapers to become stuck or incomplete scum removal, increasing the labor intensity of workers and reducing wastewater treatment efficiency and the recovery rate of concrete raw materials. Therefore, existing DAF tanks have significant shortcomings in automated water level regulation, scum removal stability, and handling of water volume fluctuations in concrete production wastewater treatment, and urgently need improvement. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a flotation tank for concrete production wastewater with automatic water level regulation function, which can automatically adapt to the fluctuation of water volume of concrete production wastewater, stabilize the water level in the tank, ensure that the scraper always efficiently removes scum, reduce manual intervention, and improve wastewater treatment efficiency and raw material recovery effect.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a flotation tank for concrete production wastewater with automatic water level regulation function, including a tank body, an inlet pipe at the bottom of the tank body, a scraper on the top of the tank body, an overflow trough at the top of one side of the tank body, and a liquid level monitoring trough at the top of the other side.

[0006] The overflow trough is equipped with a float plate, and a vertical baffle is provided on one side of the float plate. The baffle is attached to the side wall of the overflow trough, and a drain outlet is provided on the side wall of the overflow trough. The baffle blocks the drain outlet.

[0007] In a preferred embodiment, the liquid level monitoring tank is equipped with a liquid level gauge.

[0008] In a preferred embodiment, a float block is provided on the bottom surface of the float plate.

[0009] In a preferred embodiment, the overflow trough has a vertical groove on its side wall, a guide rod is provided in the vertical groove, and a protruding part extending into the vertical groove is provided on one side of the float. The guide rod is provided through the protruding part of the float in the vertical groove.

[0010] In a preferred embodiment, a spring is provided on the guide rod above the float.

[0011] In a preferred embodiment, the bottom of the overflow trough is provided with a strip groove, and the baffle is aligned with the strip groove in the vertical direction.

[0012] In a preferred embodiment, a sealing sheet is provided on the lower part of the side of the baffle facing the drain outlet.

[0013] In a preferred embodiment, a drain pipe is installed on the drain outlet.

[0014] In a preferred embodiment, the bottom of the overflow trough is provided with a cleaning trough, and the bottom of the cleaning trough is provided with a plug.

[0015] In a preferred embodiment, a slag-blocking mesh plate is provided on one side of the overflow tank and the liquid level monitoring tank, and the slag-blocking mesh plate is flush with the inner wall of the tank.

[0016] The concrete production wastewater flotation tank with automatic water level regulation function provided by this utility model has the following beneficial effects by adopting the above structure:

[0017] (1) The overflow trough, together with the floating plate and baffle, forms an automatic water level regulation mechanism. Without frequent manual intervention, the water level in the tank can be kept stable at a suitable height, ensuring that the scraper can always maintain effective contact with the water surface, continuously and efficiently scraping off the scum, improving the treatment efficiency of the flotation tank, and reducing the workload of the operators.

[0018] (2) The design of the cleaning tank and plug at the bottom of the overflow tank facilitates the regular cleaning of scum and impurities deposited in the overflow tank, preventing them from clogging the drain outlet and affecting drainage;

[0019] (3) The design of the vertical groove, guide rod and spring on the side wall of the overflow channel provides stable guidance and buffer for the lifting and lowering of the floating plate, preventing the floating plate from shaking or deviating under the impact of water flow, ensuring the stability and reliability of the water level regulation structure, and extending the service life of the air flotation tank. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2This is a schematic diagram of the overflow groove structure of this utility model.

[0023] Figure 3 This is a three-dimensional structural diagram of the overflow channel of this utility model.

[0024] Figure 4 This is a top view of the structure of this utility model.

[0025] In the diagram: 1. Pool body; 2. Inlet pipe; 3. Overflow trough; 4. Liquid level monitoring trough; 5. Liquid level gauge; 6. Scraper; 7. Float; 8. Float block; 9. Vertical trough; 10. Guide rod; 11. Spring; 12. Baffle; 13. Sealing plate; 14. Drain outlet; 15. Drain pipe; 16. Strip trough; 17. Cleaning trough; 18. Plug; 19. Slag-blocking mesh plate. Detailed Implementation

[0026] like Figure 1-4 In the present invention, a concrete production wastewater flotation tank with automatic water level regulation function includes a tank body 1, an inlet pipe 2 at the bottom of the tank body 1, a scraper 6 on the top of the tank body 1, an overflow trough 3 on the upper part of one side of the tank body 1, and a liquid level monitoring trough 4 on the upper part of the other side.

[0027] The overflow trough 3 is provided with a float plate 7, and a vertical baffle 12 is provided on one side of the float plate 7. The baffle 12 is attached to the side wall of the overflow trough 3, and a drain outlet 14 is provided on the side wall of the overflow trough 3. The baffle 12 blocks the drain outlet 14.

[0028] In a preferred embodiment, a level gauge 5 is provided inside the level monitoring tank 4.

[0029] In a preferred embodiment, a float 8 is provided on the bottom surface of the float plate 7.

[0030] In a preferred embodiment, the overflow trough 3 has a vertical groove 9 on its side wall, a guide rod 10 is provided in the vertical groove 9, and a protruding part extending into the vertical groove 9 is provided on one side of the float 8. The guide rod 10 is set through the protruding part of the float 8 in the vertical groove 9.

[0031] In a preferred embodiment, a spring 11 is provided on the guide rod 10 above the float 7.

[0032] In a preferred embodiment, the bottom of the overflow trough 3 is provided with a strip groove 16, and the baffle 12 is aligned with the strip groove 16 in the vertical direction.

[0033] In a preferred embodiment, a sealing sheet 13 is provided on the lower part of the side of the baffle 12 facing the drain outlet 14.

[0034] In a preferred embodiment, a drain pipe 15 is installed on the drain outlet 14.

[0035] In a preferred embodiment, the bottom of the overflow trough 3 is provided with a cleaning trough 17, and the bottom of the cleaning trough 17 is provided with a plug 18.

[0036] In a preferred embodiment, a slag-blocking mesh plate 19 is provided on one side of the overflow tank 3 and the liquid level monitoring tank 4, and the slag-blocking mesh plate 19 is flush with the inner wall of the tank body 1.

[0037] The present invention discloses a concrete production wastewater flotation tank with automatic water level regulation function, which, during concrete production wastewater treatment operations:

[0038] Concrete production wastewater containing cement particles, sand, and gravel debris enters the tank 1 through the inlet pipe 2. The liquid level in the tank gradually rises, and microbubbles combine with suspended solids in the wastewater to form scum, which floats to the surface. When the liquid level rises to the height of the float 8, the float 8, under the action of buoyancy, drives the float plate 7 to rise, and the baffle 12 moves upward accordingly. The drain outlet 14 opens, and excess wastewater is discharged through the drain pipe 15, stabilizing the water level in the tank at a height where the scraper 6 can effectively scrape off the scum, ensuring that the scraper 6 completely removes the scum (which can be recycled as a concrete additive).

[0039] During this process, the level gauge 5 continuously monitors the liquid level in the tank 1. Due to the large amount of impurities in the concrete wastewater, an anti-interference ultrasonic sensor should be selected for the level gauge 5. When the liquid level exceeds the set range (such as when the water level is abnormal due to excessive scum), the level gauge 5 transmits a signal to the alarm device, which alerts the staff to handle the situation in a timely manner through audible and visual alarms to prevent scum from overflowing or the scraper from getting stuck.

[0040] The slag-blocking mesh 19 prevents large pieces of concrete debris from entering the overflow tank 3 and the liquid level monitoring tank 4, thus preventing blockage or interference with monitoring. Regularly opening the plug 18 at the bottom of the cleaning tank 17 allows for the removal and cleaning of accumulated concrete debris in the overflow tank 3, preventing it from hardening and affecting drainage. The spring 11 and guide rod 10 ensure the stable raising and lowering of the float 7 under the impact of wastewater flow, while the sealing plate 13 enhances the sealing effect of the baffle 12 on the drain outlet 14, preventing wastewater leakage at low water levels.

Claims

1. A flotation tank for concrete production wastewater with automatic water level regulation function, comprising a tank body (1), an inlet pipe (2) at the lower part of the tank body (1), and a scraper (6) on the upper part of the tank body (1), characterized in that: The pool body (1) has an overflow trough (3) on the upper part of one side and a liquid level monitoring trough (4) on the upper part of the other side. The overflow trough (3) is provided with a float plate (7), and a vertical baffle (12) is provided on one side of the float plate (7). The baffle (12) is attached to the side wall of the overflow trough (3). A drain outlet (14) is provided on the side wall of the overflow trough (3). The baffle (12) blocks the drain outlet (14).

2. The concrete production wastewater flotation tank with automatic water level regulation function according to claim 1, characterized in that: The liquid level monitoring tank (4) is equipped with a liquid level gauge (5).

3. The concrete production wastewater flotation tank with automatic water level regulation function according to claim 1, characterized in that: The bottom surface of the float plate (7) is provided with a float block (8).

4. The concrete production wastewater flotation tank with automatic water level regulation function according to claim 1, characterized in that: The overflow trough (3) has a vertical groove (9) on its side wall. A guide rod (10) is provided in the vertical groove (9). The float (8) has a protruding part extending into the vertical groove (9) on one side. The guide rod (10) passes through the protruding part of the float (8) in the vertical groove (9).

5. A flotation tank for concrete production wastewater with automatic water level regulation function according to claim 4, characterized in that: A spring (11) is provided on the guide rod (10) above the float (7).

6. The concrete production wastewater flotation tank with automatic water level regulation function according to claim 1, characterized in that: The overflow trough (3) has a strip groove (16) at the bottom, and the baffle (12) is aligned with the strip groove (16) in the vertical direction.

7. A flotation tank for concrete production wastewater with automatic water level regulation function according to claim 1, characterized in that: The baffle (12) has a sealing plate (13) on the lower part of the side facing the drain outlet (14).

8. A flotation tank for concrete production wastewater with automatic water level regulation function according to claim 1, characterized in that: A drain pipe (15) is installed on the drain outlet (14).

9. A flotation tank for concrete production wastewater with automatic water level regulation function according to claim 1, characterized in that: The overflow trough (3) has a cleaning trough (17) at the bottom, and a plug (18) is provided at the bottom of the cleaning trough (17).

10. A flotation tank for concrete production wastewater with automatic water level regulation function according to claim 1, characterized in that: The overflow tank (3) and the liquid level monitoring tank (4) are respectively provided with a slag-blocking mesh plate (19) on one side, and the slag-blocking mesh plate (19) is flush with the inner wall of the tank body (1).

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