Backwash recycling system for filter tank

Abstract

The utility model discloses a filter backwashing reuse system, which comprises a recovery tank and a mixing tank, the bottom of the recovery tank is respectively provided with a first reflux pump and a second reflux pump, and the water outlet of the first reflux pump and the water outlet of the second reflux pump are respectively connected with a first connecting branch pipe and a second connecting branch pipe. The first connecting branch pipe and the second connecting branch pipe are respectively connected with the mixing tank through a connecting header pipe; and an online water level monitor is arranged at the upper part of the recycling pool. The device is simple in structure, filter backwash water is collected in the recovery tank every day, after the filter backwash water is collected and settled in the recovery tank, the recovered water is pumped to the mixing tank according to a certain proportion to be fully mixed with raw water, and the filter backwash water is recycled, so that water resources can be saved, the operation capability of a water plant is improved, and the production cost is reduced. The discharge amount of wastewater is reduced, the ecological environment is protected, the turbidity of raw water is effectively improved, low-turbidity and high-algae reservoir water treatment is facilitated, and good economic benefits and social benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and particularly relates to a filter backwashing reuse system. Background Art

[0002] During the operation of urban waterworks, 5%-10% of the water production is used by the waterworks itself, and most of the self-used water is used as the backwashing water for the filter. This part of the backwashing water is directly discharged as waste water in most waterworks, resulting in a large waste of resources. At the same time, the raw water of the Dashahe Reservoir belongs to the Class II water standard of the surface water environmental quality in GB3838-2002, which is low-turbidity and high-algae water and is relatively difficult to treat. It is necessary to appropriately increase the turbidity of the raw water. Therefore, in order to avoid the disadvantages in the prior art, it is necessary to improve the prior art. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies in the prior art and provide a filter backwashing reuse system that saves water resources.

[0004] The utility model is realized by the following technical solutions:

[0005] A filter backwashing reuse system includes a recovery tank and a mixing tank. The bottom of the recovery tank is respectively provided with a first return pump and a second return pump. The water outlets of the first return pump and the second return pump are respectively connected with a first connecting branch pipe and a second connecting branch pipe. The first connecting branch pipe and the second connecting branch pipe are respectively connected with the mixing tank through a connecting main pipe. An on-line water level monitor is arranged on the upper part of the recovery tank.

[0006] Further, a first control valve is arranged on the first connecting branch pipe.

[0007] Further, a second control valve is arranged on the second connecting branch pipe.

[0008] Further, a return water pipe is connected to the recovery tank, and a third control valve is arranged on the return water pipe.

[0009] Further, both the first return pump and the second return pump are clean water pumps.

[0010] Further, the total area of the recovery tank is 600 m 2 , the height of the recovery tank is 1.5 m, and the volume of the recovery tank is 600 m 3 .

[0011] Further, the power of both the first return pump and the second return pump is 7.5 kW, and the flow rate of the power of the first return pump and the second return pump is 150 m 3 / h.

[0012] Further, the pipe diameter of the connection main pipe is 250 mm.

[0013] Compared with the prior art, in the utility model, a first return pump and a second return pump are respectively arranged at the bottom of a recovery tank. The water outlet of the first return pump and the water outlet of the second return pump are respectively connected with a first connecting branch pipe and a second connecting branch pipe. The first connecting branch pipe and the second connecting branch pipe are respectively connected with a mixing tank through a connection main pipe. The filter backwash water is collected in the recovery tank every day. After the filter backwash water is collected and settled in the recovery tank, the recovered water is pumped to the mixing tank at a certain ratio and fully mixed with the raw water. The on-line water level monitor plays a role in monitoring the water level, controlling the pumping of a fixed amount of water to the mixing tank. The first return pump and the second return pump are used alternately to ensure the working continuity and improve the service life. The filter backwash water is recycled, which can save water resources, improve the operation capacity of the water plant, reduce the discharge amount of waste water, protect the ecological environment, effectively improve the turbidity of the raw water, is beneficial to the treatment of low-turbidity and high-algae reservoir water, and realizes good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0015] Figure 1 It is a structural schematic diagram of the filter backwash reuse system of the present utility model.

[0016] In the figure: 1 - recovery tank; 2 - mixing tank; 3 - first return pump; 4 - second return pump; 5 - first connecting branch pipe; 6 - second connecting branch pipe; 7 - connection main pipe; 8 - first control valve; 9 - second control valve; 10 - return water pipe; 11 - third control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0018] As Figure 1As shown in the figure, a backwashing reuse system for a filter tank of the present utility model includes a recovery tank 1 and a mixing tank 2. A first return pump 3 and a second return pump 4 are respectively provided at the bottom of the recovery tank 1. A first connecting branch pipe 5 and a second connecting branch pipe 6 are respectively connected to the water outlets of the first return pump 3 and the second return pump 4. The first connecting branch pipe 5 and the second connecting branch pipe 6 are respectively connected to the mixing tank 2 through a connecting main pipe 7. An on-line water level monitor is provided at the upper part of the recovery tank 1. By respectively providing the first return pump 3 and the second return pump 4 at the bottom of the recovery tank 1, the first connecting branch pipe 5 and the second connecting branch pipe 6 are respectively connected to the water outlets of the first return pump 3 and the second return pump 4, and the first connecting branch pipe 5 and the second connecting branch pipe 6 are respectively connected to the mixing tank 2 through the connecting main pipe 7. The backwashing water of the filter tank is collected in the recovery tank 1 every day. After the backwashing water of the filter tank is collected and settled in the recovery tank 1, the recovered water is pumped to the mixing tank 2 at a certain ratio and fully mixed with the raw water. The on-line water level monitor plays a role in monitoring the water level, controlling the pumping of a fixed amount of water to the mixing tank 2. The first return pump 3 and the second return pump 4 are used alternately to ensure the continuity of work and improve the service life. Recycling and reusing the backwashing water of the filter tank can save water resources, improve the operation capacity of the water plant, reduce the discharge of waste water, protect the ecological environment, effectively increase the turbidity of the raw water, is conducive to the treatment of low-turbidity and high-algae reservoir water, and realizes good economic and social benefits.

[0019] The first connecting branch pipe 5 is provided with a first control valve 8 to control the pumping of water by the first return pump 3 and prevent water from flowing back.

[0020] The second connecting branch pipe 6 is provided with a second control valve 9 to control the pumping of water by the second return pump 4 and prevent water from flowing back.

[0021] A return water pipe 10 is connected to the recovery tank 1, and the return water pipe 10 is provided with a third control valve 11 to facilitate the recovery of the backwashing water of the filter tank.

[0022] Both the first return pump 3 and the second return 4 pump are clean water pumps, which saves costs.

[0023] In a specific implementation, the total area of the recovery tank 1 is 600 m 2 , the height of the recovery tank 1 is 1.5 m, and the volume of the recovery tank 1 is 600 m 3 , which is easy to monitor and control the pump water volume.

[0024] In a specific implementation, the power of both the first return pump 3 and the second return pump 4 is 7.5 kW, and the flow rate of the power of the first return pump 3 and the second return pump 4 is 150 m 3 / h.

[0025] As a specific implementation manner, the diameter of the connecting main pipe is 250 mm, which facilitates the pumping of the backwashing water of the filter tank.

[0026] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A filter backwashing reuse system, characterized in that: It includes a recovery pool and a mixing tank. A first reflux pump and a second reflux pump are respectively provided at the bottom of the recovery pool. The water outlet of the first reflux pump and the water outlet of the second reflux pump are respectively connected to a first connecting branch pipe and a second connecting branch pipe. The first connecting branch pipe and the second connecting branch pipe are respectively connected to the mixing tank through a connecting main pipe. An online water level monitor is provided on the upper part of the recovery pool.

2. The filter backwashing reuse system according to claim 1 is characterized in that: The first connecting branch pipe is provided with a first control valve.

3. The filter backwashing reuse system according to claim 1 is characterized in that: The second connecting branch pipe is provided with a second control valve.

4. The filter backwashing reuse system according to claim 1 is characterized in that: The recovery tank is connected with a return pipe, and the return pipe is provided with a third control valve.

5. The filter backwashing reuse system according to claim 1 is characterized in that: The first reflux pump and the second reflux pump are both clean water pumps.

6. The filter backwashing reuse system according to claim 1 is characterized in that: The total area of ​​the recycling pool is 600m 2 The height of the recovery pool is 1.5m, and the volume of the recovery pool is 600m 3 .

7. The filter backwashing reuse system according to claim 1 is characterized in that: The power of the first reflux pump and the second reflux pump are both 7.5kW, and the flow rate of the first reflux pump and the second reflux pump is both 150m 3 / h.

8. The filter backwashing reuse system according to claim 1, characterized in that: The diameter of the connecting main pipe is 250 mm.

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