Active vacuumizing backwashing device for valveless filter tank

Abstract

The utility model discloses an active vacuum-pumping backwashing device for a valveless filter, which belongs to the technical field of sewage treatment and comprises a valveless filter structure and a sedimentation structure which are connected together through a pipeline, the sedimentation structure comprises a sedimentation tank, an overflow tank is arranged at the upper part of the sedimentation tank and is connected with an overflow tank through an overflow pipe, and the overflow pipe is connected with the overflow tank. The overflow pool is connected with a pump set through a plurality of pump set water inlet pipes, the pump set is connected with a filtering water tank through a pump set water outlet pipe, and the side wall of the filtering water tank is connected with a valveless filtering pool structure through a water return pipe; the bottom of the filtering water tank is connected with a backflow water inlet pipe, the backflow water inlet pipe is connected with a backflow water outlet pipe through a pump set, and a water outlet of the backflow water outlet pipe is located above the overflow pool. The energy-saving water drainage device has a good backwashing effect, avoids the waste of water resources, and achieves the purposes of energy conservation and water drainage.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an active vacuum backwashing device for a valveless filter tank. Background Art

[0002] The valveless filter is a rapid filter that does not use valves to switch between filtering and backwashing. It consists of a filter body, a water inlet device, and a siphon device. During operation, the outlet water level remains constant, and the inlet water level continues to rise in the siphon as the resistance of the filter layer increases. When the water level rises to the top of the siphon and forms a siphon, the filter layer backwashing starts automatically, and the flushing wastewater is discharged from the filter along the siphon. The current valveless filter directly discharges water after backwashing, which wastes water resources. Based on this, the utility model proposes an active vacuum backwashing device for valveless filters. Utility Model Content

[0003] The utility model aims to provide a valveless filter tank active vacuum backwashing device to solve the above-mentioned problems.

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

[0005] The utility model discloses an active vacuum backwashing device for a valveless filter, comprising a valveless filter structure and a sedimentation structure connected together by pipelines, wherein the sedimentation structure comprises a sedimentation tank, an overflow trough is arranged on the upper part of the sedimentation tank, the overflow trough is connected to the overflow tank through an overflow pipe, the overflow tank is connected to a pump group through a plurality of pump group water inlet pipes, the pump group is connected to a filter water tank through a pump group water outlet pipe, and the side wall of the filter water tank is connected to the valveless filter structure through a return water pipe; the bottom of the filter water tank is connected to a reflux water inlet pipe, the reflux water inlet pipe is connected to a reflux water outlet pipe through a pump group, and the water outlet of the reflux water outlet pipe is located above the overflow tank.

[0006] Furthermore, the valveless filter tank structure includes a water inlet pipe, which is connected to a water tank, a distribution water tank is arranged in the water tank, the distribution water tank is connected to a U-shaped water seal pipe, the U-shaped water seal pipe is connected to the filter layer and the connecting pipe through a tee, and the filter layer is located in the filter box; the connecting pipe is connected to the siphon riser, the siphon riser is connected to the siphon downcomer, the water outlet of the siphon downcomer is located in a drainage well, and the drainage well is connected to the sedimentation structure through a central pipe.

[0007] Furthermore, a water outlet trough is provided at an upper position inside the filter box, and the water outlet trough is connected to a water outlet pipe.

[0008] Furthermore, a siphon breaking bucket is provided in the filter box, the siphon breaking bucket is connected to a siphon breaking pipe, the siphon breaking pipe is connected to a siphon auxiliary pipe, and the water outlet of the siphon auxiliary pipe is located in the drainage well.

[0009] Furthermore, the filtered water tank includes a clean water chamber and a turbid water chamber separated by an intermediate filter plate, and a water outlet connected to the return water pipe is arranged on the side wall of the clean water chamber; a buffer chamber connected to the water outlet pipe of the pump group is arranged on the top of the turbid water chamber, and a water inlet is arranged between the buffer chamber and the turbid water chamber.

[0010] Furthermore, the siphon riser is connected to a vacuum pumping device.

[0011] Compared with the prior art, the beneficial technical effects of the utility model are:

[0012] The utility model discloses an active vacuum backwashing device for valveless filter tank, which can effectively ensure that no water enters the water inlet pipe into the siphon pipe during normal backwashing, thus avoiding water waste and ensuring the backwashing effect. The water after backwashing is precipitated and filtered, and then returns to the water tank for the next round of backwashing, thus avoiding water waste and achieving the purpose of energy-saving drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 This is a front view of the active vacuum backwashing device for the valveless filter tank of the utility model;

[0015] Figure 2 A cross-sectional view of a water filter tank;

[0016] Figure 3 It is a schematic diagram of the overflow pool structure;

[0017] Explanation of reference numerals: 1, water inlet pipe; 2, water tank; 3, distribution water tank; 4, U-shaped water seal pipe; 5, filter layer; 6, filter box; 7, connecting pipe; 8, siphon riser; 9, siphon downcomer; 10, drainage well; 11, siphon breaking bucket; 12, siphon breaking pipe; 13, siphon auxiliary pipe; 14, water outlet trough; 15, water outlet pipe; 16, central pipe; 17, sedimentation tank; 18, overflow trough; 19, overflow pipe; 20, overflow tank; 21, pump group; 22, filtered water tank; 23, return pipe; 24, pump group water inlet pipe; 25, pump group water outlet pipe; 26, reflux water inlet pipe; 27, reflux water outlet pipe;

[0018] 2201, clean water chamber; 2202, muddy water chamber; 2203, filter plate; 2204, buffer chamber; 2205, water inlet; 2206, water outlet. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown, a valveless filter tank active vacuum backwashing device includes a valveless filter tank structure and a sedimentation structure connected together by pipelines, wherein the sedimentation structure includes a sedimentation tank 17, an overflow tank 18 is installed on the upper part of the sedimentation tank 17, and the overflow tank 18 is connected to an overflow tank 20 through an overflow pipe 19, and the overflow tank 20 is connected to a pump group 21 through a plurality of pump group water inlet pipes 24, and the pump group 21 is connected to a filter water tank 22 through a pump group water outlet pipe 25, and the side wall of the filter water tank 22 is connected to the valveless filter tank structure through a return water pipe 23. The bottom of the filter water tank 22 is connected to a return water inlet pipe 26, and the return water inlet pipe 26 is connected to a return water outlet pipe 27 through the pump group 21, and the outlet of the return water outlet pipe 27 is located above the overflow tank 20.

[0020] Specifically, after the water in the drainage well 10 enters the sedimentation tank 17 for sedimentation, the upper clear liquid enters the overflow tank 18 and finally reaches the overflow tank 20, and then is pumped into the filter water tank 22 for filtration under the action of the pump group 21, and the filtered clean water returns to the water tank 2 through the return pipe 23 for the next round of flushing. In addition, once there is a lot of water in the filter water tank 22, the water can be pumped out from the return water inlet pipe 26 connected to the bottom through the pump group 21, and fall into the overflow tank 20 through the return water outlet pipe 27, waiting for the next filtration, so as to prevent overflow.

[0021] The valveless filter structure includes an inlet pipe 1, which is connected to a water tank 2, in which a distribution water tank 3 is installed, and the distribution water tank 3 is connected to a U-shaped water seal pipe 4, and the U-shaped water seal pipe 4 is connected to a filter layer 5 and a connecting pipe 7 through a tee, and the filter layer 5 is located in a filter box 6. The connecting pipe 7 is connected to a siphon riser 8, and the siphon riser 8 is connected to a siphon downcomer 9, and the water outlet of the siphon downcomer 9 is located in a drainage well 10, and the drainage well 10 is connected to the sedimentation structure through a central pipe 16. The siphon riser 8 is connected to a vacuum pumping device, which changes the passive vacuum pumping into an active vacuum pumping to avoid the problem that the siphon effect cannot be effectively realized after there is air in the pipe.

[0022] Specifically, the water inlet pipe 1 delivers water into the water tank 2. After the water tank 2 is full, the clean water overflows to the distribution water tank 3. The water in the distribution water tank 3 enters the filter layer 5 from the U-shaped water seal pipe 4 and is filtered from top to bottom. The clean water is stored in the filter box 6. The filter layer 5 continuously intercepts suspended matter, causing the filter layer resistance to gradually increase, thereby prompting the water level in the siphon riser 8 to continue to rise. When the water level reaches the top of the siphon riser 8, that is, the top pipe opening of the siphon auxiliary pipe 13, water falls from the pipe, taking away the air in the siphon downcomer. When the vacuum degree reaches a certain value, the siphon effect occurs.

[0023] A water outlet trough 14 is installed at the upper position inside the filter box 6 , and the water outlet trough 14 is connected to a water outlet pipe 15 .

[0024] A siphon breaking bucket 11 is installed in the filter box 6, and the siphon breaking bucket 11 is connected to a siphon breaking pipe 12, and the siphon breaking pipe 12 is connected to a siphon auxiliary pipe 13, and the water outlet of the siphon auxiliary pipe 13 is located in the drainage well 10. The water inlet of the siphon auxiliary pipe 13, the water outlet of the siphon breaking pipe 12 and the top of the siphon riser 8 are connected together.

[0025] Specifically, after the siphon effect occurs, when the water level in the filter box 6 drops to the mouth of the siphon breaking pipe 12, air enters the siphon rising pipe 8, destroying the siphon effect, the filter tank backwashing ends, and the filter tank enters the next cycle of work.

[0026] The filtered water tank 22 includes a clean water chamber 2201 and a muddy water chamber 2202 separated by an intermediate filter plate 2203, the return pipe 23 connected to the water outlet 2206 is installed on the side wall of the clean water chamber 2201, a buffer chamber 2204 connected to the pump group water outlet pipe 25 is installed on the top of the muddy water chamber 2202, and a water inlet 2205 is installed between the buffer chamber 2204 and the muddy water chamber 2202.

[0027] Specifically, the filtered water is stored in the clean water chamber 2201 for subsequent recycling, and the unfiltered water is in the muddy water chamber 2202; in addition, the bottom of the middle filter plate 2203 is a bent structure, located above the bottom water outlet.

[0028] The action process of the utility model is as follows:

[0029] First, water is sent from the water inlet pipe 1 into the filter layer 5 for filtering from top to bottom. The filter layer 5 continuously intercepts suspended matter, causing the filter layer resistance to gradually increase, thereby causing the water level in the siphon riser 8 to continuously rise. When the water level reaches the top of the siphon riser 8, i.e., the top pipe opening of the siphon auxiliary pipe 13, water falls from the pipe, taking away the air in the siphon downcomer. When the vacuum degree reaches a certain value, a siphon effect occurs, backwashing is performed, and the suspended matter is flushed into the drainage well 10; then, it enters the sedimentation tank 17 for sedimentation; finally, the upper clear liquid is filtered through the filter water tank 22, and the filtered clean water returns to the water tank 2 through the reflux pipe 23 for the next round of flushing.

[0030] The embodiments described above are only descriptions of the preferred methods 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 fall within the protection scope determined by the claims of the present invention.

Claims

1. An active vacuum backwashing device for a valveless filter, characterized in that: The invention comprises a valveless filter tank structure and a sedimentation structure connected together by pipelines, wherein the sedimentation structure comprises a sedimentation tank (17), an overflow trough (18) is arranged on the upper part of the sedimentation tank (17), the overflow trough (18) is connected to an overflow tank (20) through an overflow pipe (19), the overflow tank (20) is connected to a pump group (21) through a plurality of pump group water inlet pipes (24), the pump group (21) is connected to a filter water tank (22) through a pump group water outlet pipe (25), and the side wall of the filter water tank (22) is connected to the valveless filter tank structure through a return water pipe (23); the bottom of the filter water tank (22) is connected to a return water inlet pipe (26), the return water inlet pipe (26) is connected to a return water outlet pipe (27) through the pump group (21), and the water outlet of the return water outlet pipe (27) is located above the overflow tank (20).

2. The active vacuum backwashing device for valveless filter according to claim 1 is characterized in that: The valveless filter tank structure comprises a water inlet pipe (1), the water inlet pipe (1) is connected to a water tank (2), a distribution water tank (3) is arranged in the water tank (2), the distribution water tank (3) is connected to a U-shaped water seal pipe (4), the U-shaped water seal pipe (4) is connected to a filter layer (5) and a connecting pipe (7) through a tee, the filter layer (5) is located in a filter box (6); the connecting pipe (7) is connected to a siphon riser (8), the siphon riser (8) is connected to a siphon downcomer (9), the water outlet of the siphon downcomer (9) is located in a drainage well (10), and the drainage well (10) is connected to the sedimentation structure through a central pipe (16).

3. The active vacuum backwashing device for valveless filter according to claim 2 is characterized in that: A water outlet trough (14) is provided at the upper position inside the filter box (6), and the water outlet trough (14) is connected to a water outlet pipe (15).

4. The active vacuum backwashing device for valveless filter according to claim 2 is characterized in that: A siphon breaking bucket (11) is arranged in the filter box (6), the siphon breaking bucket (11) is connected to a siphon breaking pipe (12), the siphon breaking pipe (12) is connected to a siphon auxiliary pipe (13), and the water outlet of the siphon auxiliary pipe (13) is located in the drainage well (10).

5. The active vacuum backwashing device for valveless filter according to claim 1 is characterized in that: The filtered water tank (22) comprises a clean water chamber (2201) and a muddy water chamber (2202) separated by an intermediate filter plate (2203); the side wall of the clean water chamber (2201) is provided with the return pipe (23) connected to a water outlet (2206); the top of the muddy water chamber (2202) is provided with a buffer chamber (2204) connected to the pump group water outlet pipe (25); a water inlet (2205) is provided between the buffer chamber (2204) and the muddy water chamber (2202).

6. The active vacuum backwashing device for valveless filter according to claim 2 is characterized in that: The siphon riser (8) is connected to a vacuum pump.

Images