Air-entrapped floc separation system of air flotation machine

Abstract

The utility model discloses an air floatation machine air inclusion floc separation system which comprises a mixing tank and an air floatation tank, waste water in the mixing tank can overflow into the air floatation tank, a rotatable floc separation roller is arranged at the top liquid level position of the air floatation tank, a scraper blade capable of scraping floc on the floc separation roller is arranged on one side of the air floatation tank, and the floc separation roller is arranged on the other side of the air floatation tank. A water collector positioned below the floc separation roller is arranged on the air floatation tank, the water collector sends wastewater back to the mixing tank through a backflow pipeline, and a regulating valve is arranged on the backflow pipeline. According to the air-entrapped floc separation system of the air flotation machine, floc is close to the floc separation roller through liquid level flow circulation, the floc separation roller rolls to fish out the floc from the tank, and the floc is stripped under the action of the scraper and falls into the scum dehydration treatment equipment to be further treated, so that the volume and the structure of the floc separation system are optimized and simplified, and the cost and the failure rate of the floc separation system are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to an air-entrained flocculent separation device of an air floatation machine. Background Art

[0002] Air flotation machine is a water treatment equipment that produces a large number of fine bubbles in the water by the dissolved air system, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state with a density less than that of water. The buoyancy principle is used to make it float on the water surface, thereby realizing solid-liquid separation. Air flotation machine is divided into super-efficient shallow air flotation machine, vortex air flotation machine, and horizontal flow air flotation machine. It is used in water supply, industrial wastewater and urban sewage treatment. The advantage of air flotation machine is that it is a solid-liquid separation equipment with low investment, extremely small floor space, high degree of automation, and convenient operation and management.

[0003] Before the wastewater enters the flotation machine, chemical flocculation and coagulant are added. After an effective flocculation reaction, it enters the flotation contact zone. In the contact zone, the microbubbles in the water in the container adhere to the suspended matter. Under the action of the bubbles, the floccules and bubbles float to the liquid surface together to form scum, realizing solid-liquid separation. Under the action of the scum scraper, the scum is scraped to the subsequent scum dehydration treatment equipment. The scum scraper mechanism is large in size, has a high failure rate, and is frequently repaired. Therefore, an air-entrained flocculent separation system of the flotation machine is proposed to reduce the cost of scraping scum. Utility Model Content

[0004] The utility model aims to provide an air flotation machine clamping air floc separation system to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flotation machine clamp air floc separation system comprises a mixing tank and an air flotation tank. Wastewater in the mixing tank can overflow into the air flotation tank. A rotatable floc separation drum is arranged at the liquid level position on the top of the air flotation tank. A scraper capable of scraping flocs off the floc separation drum is arranged on one side of the air flotation tank.

[0007] As a further solution of the utility model: the flotation tank is provided with a water collector located below the floc separation drum, the water collector returns the waste water to the mixing tank through a return pipeline, and a regulating valve is provided on the return pipeline.

[0008] As a further solution of the utility model: a sediment collecting tank is arranged at the bottom of the flotation tank, the sediment collecting tank is connected with the reflux pipeline through a sediment extraction pipeline, and a regulating valve is arranged on the sediment extraction pipeline.

[0009] As a further solution of the utility model: a slow flow groove is arranged on one side of the flotation tank, the slow flow groove is connected with the return pipeline through a decontamination pipeline, and a regulating valve is arranged on the decontamination pipeline.

[0010] As a further solution of the utility model: an overflow trough capable of receiving overflow is arranged on one side of the slow flow trough, an air pipe is arranged on the top of the overflow trough, and the bottom is connected to a water outlet pipeline.

[0011] As a further solution of the utility model: a liquid pump is arranged on the reflux pipeline.

[0012] As a further solution of the utility model: a distributor is installed in the mixing tank, the distributor is connected to a mixing pipeline, and the mixing pipeline is connected to a compressed air pipeline, a dosing pipeline and a wastewater pipeline.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the air flotation machine air floc separation system, the flocs are circulated through the liquid surface flow to approach the floc separation drum, the floc separation drum rolls to pick the flocs out of the pool, and are peeled off under the action of the scraper and fall into the scum dehydration treatment equipment for further treatment, thereby optimizing and simplifying the volume and structure of the floc separation system and reducing its cost and failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an air flotation machine and air floc separation system.

[0016] In the figure: 1. Mixing tank; 2. Mixing pipeline; 3. Compressed air pipeline; 4. Wastewater pipeline; 5. Dosing pipeline; 6. Flotation tank; 7. Distributor; 8. Floc separation drum; 9. Scraper; 10. Scum dehydration treatment equipment; 11. Sediment collection tank; 12. Sediment extraction pipeline; 13. Slow flow tank; 14. Decontamination pipeline; 15. Overflow tank; 16. Water outlet pipeline; 17. Air pipe; 18. Water collector; 19. Liquid pump; 20. Reflux pipeline. DETAILED DESCRIPTION

[0017] See also Figure 1In an embodiment of the utility model, a flotation machine clamps air floc separation system, comprising a mixing tank 1 and an air flotation tank 6. The wastewater in the mixing tank 1 can overflow into the air flotation tank 6. A rotatable floc separation drum 8 is provided at the liquid level position on the top of the air flotation tank 6. A scraper 9 capable of scraping flocs off the floc separation drum 8 is provided on one side of the air flotation tank 6. The floc separation drum 8 is driven by a motor to rotate and bring out the flocs. When rotating to the other side, the flocs are peeled off by the scraper 9 and fall into the scum dehydration treatment equipment 10 for further treatment. The floc separation drum 8 is wrapped with a felt cloth to which flocs can be attached on the outside. The felt cloth is a consumable and needs to be replaced. The scraper 9 flows into the next step after peeling off the flocs. No scum scraper mechanism is required. The volume is small, the structure is simple, the failure rate is low, and the maintenance cost is low.

[0018] In a preferred embodiment, a water collector 18 is provided on the flotation tank 6 and is located below the floc separation drum 8. The water collector 18 returns the wastewater to the mixing tank 1 through a return line 20. A regulating valve is provided on the return line 20. The wastewater in the mixing tank 1 overflows into the flotation tank 6. The water collector 18 of the flotation tank 6 extracts the flocs and pool water on the upper layer that are floated to the liquid surface, thereby accelerating the liquid surface flow rate, transporting the flocs on the liquid surface, and quickly sending the flocs to the floc separation drum 8 area, and being taken out and separated by the floc separation drum 8.

[0019] In a preferred embodiment, a sediment collection tank 11 is provided at the bottom of the flotation tank 6, and the sediment collection tank 11 is connected to the return pipeline 20 through a sediment extraction pipeline 12. A regulating valve is provided on the sediment extraction pipeline 12. The low water flow of the flotation tank 6 is discharged outward, and when passing through the sediment collection tank 11, the sediment is gathered in the sediment collection tank 11 and sent out.

[0020] In a preferred embodiment, a slow flow trough 13 is provided on one side of the flotation tank 6, and the slow flow trough 13 is connected to the return line 20 through a decontamination pipeline 14. A regulating valve is provided on the decontamination pipeline 14. The slow flow trough 13 performs secondary precipitation on the flocs and sediments, and the sediments are sent out through the decontamination pipeline 14. The regulating valve adjusts the output amount or output ratio. The return line 20 can be connected to a branch pipe and controlled by a three-way valve to switch to the branch pipe for discharge during the sediment output.

[0021] In a preferred embodiment, an overflow trough 15 capable of receiving overflow is provided on one side of the slow flow trough 13, an air pipe 17 is provided on the top of the overflow trough 15, and the bottom is connected to a water outlet pipeline 16. After floc separation and sedimentation, the overflow from the sediment extraction pipeline 12 enters the overflow trough 15 and is discharged through the water outlet pipeline 16.

[0022] In a preferred embodiment, a liquid pump 19 is provided on the return pipeline 20. The liquid pump 19 serves as a main return power device to send the wastewater with flocs back to the mixing tank 1 through the return pipeline 20 for secondary circulation.

[0023] In a preferred embodiment, a distributor 7 is installed in the mixing tank 1, and the distributor 7 is connected to the mixing pipeline 2. The mixing pipeline 2 is connected to the compressed air pipeline 3, the dosing pipeline 5 and the wastewater pipeline 4. The wastewater is mixed with compressed air and the agent in the mixing pipeline 2 to produce dissolved water containing saturated air.

[0024] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0025] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An air flotation machine-clamped floc separation system, comprising a mixing tank (1) and an air flotation tank (6), wherein wastewater in the mixing tank (1) can overflow into the air flotation tank (6), characterized in that: A rotatable floc separation drum (8) is provided at the top liquid level of the flotation tank (6), and a scraper (9) capable of scraping flocs off the floc separation drum (8) is provided on one side of the flotation tank (6).

2. The air flotation machine clamp air floc separation system according to claim 1, characterized in that: The flotation tank (6) is provided with a water collector (18) located below the floc separation drum (8). The water collector (18) returns the wastewater to the mixing tank (1) via a return pipeline (20). A regulating valve is provided on the return pipeline (20).

3. The air flotation machine clamp air floc separation system according to claim 2, characterized in that: A sediment collection tank (11) is provided at the bottom of the flotation tank (6); the sediment collection tank (11) is connected to a return pipeline (20) via a sediment extraction pipeline (12); and a regulating valve is provided on the sediment extraction pipeline (12).

4. The air flotation machine clamp air floc separation system according to claim 2, characterized in that: A slow flow groove (13) is provided on one side of the flotation tank (6); the slow flow groove (13) is connected to a return pipeline (20) via a decontamination pipeline (14); and a regulating valve is provided on the decontamination pipeline (14).

5. The air flotation machine-gas floc separation system according to claim 4, characterized in that: An overflow trough (15) capable of receiving overflow is provided on one side of the slow flow trough (13); an air pipe (17) is provided on the top of the overflow trough (15), and the bottom is connected to a water outlet pipeline (16).

6. An air flotation machine clamp air floc separation system according to any one of claims 2-5, characterized in that: The reflux pipeline (20) is provided with a liquid pump (19).

7. The air flotation machine-gas floc separation system according to claim 1, characterized in that: A distributor (7) is installed in the mixing tank (1), the distributor (7) is connected to the mixing pipeline (2), and the mixing pipeline (2) is connected to the compressed air pipeline (3), the dosing pipeline (5) and the wastewater pipeline (4).

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