Wastewater recycling system for backflushing vehicle of air floatation filter tank of water purification plant

Abstract

The utility model relates to the technical field of water production and water purification production, in particular to a wastewater recycling system for a water purification plant air floatation filter backflushing vehicle, and aims to solve the problem that a large amount of wastewater is not recycled in the process of flushing filter sand in a filter tank by the existing water purification plant air floatation filter backflushing vehicle. Generally, the polymerization effect of the water purification coagulant is relatively poor, the utilization efficiency is relatively low, and the overall water purification production efficiency is finally influenced. The system mainly comprises a clarification tank, a filter tank, a monitoring sensor, a wastewater collection tank, a PLC (programmable logic controller) and the like, wastewater generated after filter sand in the filter tank is washed by a backflushing vehicle of the air floatation filter tank is introduced into the wastewater collection tank, and then the wastewater is controllably introduced into the clarification tank again through a wastewater lifting pump; in the whole process, the PLC is matched to receive water quality monitoring and flow control of the wastewater by each monitoring sensor, so that the recycling efficiency of the wastewater is effectively improved, the polymerization effect of the water purification coagulant is ensured, and the overall economic benefit of water purification production is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water production and purification, in particular to a wastewater recycling system for a flotation filter tank backwash vehicle in a water purification plant. Background Art

[0002] The flotation filter is one of the most important links in the water treatment system of the water purification station. During its operation, the regular cleaning process of the filter sand by the backwash truck will produce about 100m³ of sewage per hour (200m³ cumulatively). This not only increases the water intake and sewage discharge, but also significantly reduces the utilization efficiency of the coagulant. Especially in winter when the water temperature is low, the polymerization effect of the coagulant is significantly reduced, which has a great impact on the overall efficiency of water purification production. Utility Model Content

[0003] The utility model provides a water purification plant flotation filter tank backwash vehicle wastewater recycling system to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A water purification plant flotation filter tank and backwash vehicle wastewater recycling system includes a first clarifier and a second clarifier, the outlet pipes of the first clarifier and the second clarifier are connected to the first flotation filter tank and the second flotation filter tank, the filter tank sewage pipes of the first flotation filter tank and the second flotation filter tank and the backwash vehicle sewage pipe are both connected to a wastewater collection tank, and water inlet pipes are connected between the wastewater collection tank and the first clarifier and the second clarifier, and a wastewater lifting pump is provided on the water inlet pipe.

[0006] Furthermore, a first monitoring sensor is provided on the outlet pipe, a second monitoring sensor is provided on the filter tank sewage pipe and the backwash vehicle sewage pipe, and a third monitoring sensor is provided on the water inlet pipe, and the first monitoring sensor, the second monitoring sensor and the third monitoring sensor are all connected to the PLC controller.

[0007] Furthermore, a solenoid valve is provided on the output pipe of the wastewater lifting pump, and the solenoid valve is also connected to the PLC controller.

[0008] The utility model has the following beneficial effects:

[0009] The utility model provides a water purification plant flotation filter tank backwash truck wastewater recycling and utilization system, which is mainly composed of a clarifier, a filter tank, a monitoring sensor, a wastewater collection tank and a PLC controller and other components. The wastewater after the flotation filter tank backwash truck flushes the filter sand is introduced into the wastewater collection tank, and then the wastewater is controllably reintroduced into the clarifier through the wastewater lifting pump. The whole process is matched with the PLC controller to receive the water quality monitoring and flow control of the wastewater by each monitoring sensor, thereby effectively improving the wastewater recycling efficiency, ensuring the polymerization effect of the water purification coagulant and the stability of the effluent water quality throughout the year, thereby greatly improving the overall economic benefits of the water purification production, and solving the problem that in the current water purification plant air flotation filter tank backwash truck flushing the filter sand, a large amount of wastewater generated is not reused, which usually leads to poor polymerization effect and low utilization efficiency of the water purification coagulant, and ultimately affects the overall efficiency of the water purification production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] The meanings of the reference numerals are as follows:

[0012] 1. First clarifier; 2. Second clarifier; 3. Water pipe in the water intake pump room; 4. Outlet pipe; 5. First flotation filter; 6. Second flotation filter; 7. First monitoring sensor; 8. Filter drain pipe; 9. Backwash vehicle drain pipe; 10. Second monitoring sensor; 11. Wastewater collection tank; 12. Wastewater lift pump; 13. Solenoid valve; 14. Water inlet pipe; 15. Third monitoring sensor; 16. PLC controller. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] like Figure 1 As shown, a water purification plant flotation filter tank backwash vehicle wastewater recycling system includes a first clarifier 1 and a second clarifier 2, the outlet pipes 4 of the first clarifier 1 and the second clarifier 2 are connected to the first flotation filter 5 and the second flotation filter 6, the filter tank sewage pipes 8 and the backwash vehicle sewage pipe 9 of the first flotation filter 5 and the second flotation filter 6 are both connected to the wastewater collection tank 11, and an inlet pipe 14 is connected between the wastewater collection tank 11 and the first clarifier 1 and the second clarifier 2, and a wastewater lifting pump 12 is provided on the water inlet pipe 14.

[0015] A first monitoring sensor 7 is provided on the outlet pipe 4, a second monitoring sensor 10 is provided on the filter tank sewage pipe 8 and the backwash vehicle sewage pipe 9, and a third monitoring sensor 15 is provided on the water inlet pipe 14, and the first monitoring sensor 7, the second monitoring sensor 10 and the third monitoring sensor 15 are all connected to the PLC controller 16.

[0016] A solenoid valve 13 is provided on the output pipe of the wastewater lifting pump 12 , and the solenoid valve 13 is also connected to the PLC controller 16 .

[0017] In a specific application, the utility model firstly builds a wastewater collection pool 11 with a capacity that meets the wastewater discharge requirements at the outlet end of the first flotation filter 5 and the second flotation filter 6, and then connects the wastewater collection pool 11 with the first flotation filter 5, the second flotation filter 6 and the first clarification tank 1 and the second clarification tank 2 with an inlet pipe 14, a sewage pipe 8 and a sewage pipe 9 for a backwash vehicle, and then installs a second monitoring sensor 10 at the sewage pipe 8 and the sewage pipe 9 for the backwash vehicle, installs a third monitoring sensor 15 at the water inlet pipe 14, and installs a first monitoring sensor 7 at the outlet pipe 4. Then, when the wastewater is discharged from the first flotation filter 5 and the second flotation filter 6, the wastewater collection pool 11 is connected with the first flotation filter 5, the second flotation filter 6 and the first clarification tank 1 and the second clarification tank 2. After the wastewater discharged from the second flotation filter 6 enters the wastewater collection tank 11 through the sewage pipe 8 and the backwash vehicle sewage pipe 9, the PLC controller 16 monitors the second monitoring sensor 10 and the first monitoring sensor 7 for various water quality indicators such as wastewater turbidity, pH value and coagulant residue, and controls the solenoid valve 13 to open and enables the wastewater lifting pump 12 to re-pump the wastewater into the first clarification tank 1 and the second clarification tank 2 for recycling, thereby greatly improving the recycling efficiency of the wastewater discharged from the flotation filter backwash vehicle, and thus improving the overall efficiency and economic benefits of water purification production. Therefore, the system as a whole has good practicality.

Claims

1. A water purification plant flotation filter tank backwash vehicle wastewater recycling system, comprising a first clarifier (1) and a second clarifier (2), wherein the outlet pipes (4) of the first clarifier (1) and the second clarifier (2) are connected to the first flotation filter tank (5) and the second flotation filter tank (6), and wherein: The filter tank drain pipes (8) of the first flotation filter tank (5) and the second flotation filter tank (6) and the backwash vehicle drain pipe (9) are all connected to the wastewater collection tank (11). A water inlet pipe (14) is connected between the wastewater collection tank (11) and the first clarification tank (1) and the second clarification tank (2), and a wastewater lifting pump (12) is provided on the water inlet pipe (14).

2. The water purification plant flotation filter tank backwash vehicle wastewater recycling system according to claim 1 is characterized by: The outlet pipe (4) is provided with a first monitoring sensor (7), the filter tank sewage pipe (8) and the backwash vehicle sewage pipe (9) are provided with a second monitoring sensor (10), the water inlet pipe (14) is provided with a third monitoring sensor (15), and the first monitoring sensor (7), the second monitoring sensor (10) and the third monitoring sensor (15) are all connected to a PLC controller (16).

3. The water purification plant flotation filter tank backwash vehicle wastewater recycling system according to claim 2 is characterized by: An electromagnetic valve (13) is provided on the output pipe of the wastewater lifting pump (12), and the electromagnetic valve (13) is also connected to the PLC controller (16).

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