Integrated filtering device

Abstract

The utility model discloses an integrated filtering device and relates to the technical field of sewage treatment. A pipeline parallel water outlet pipeline and a pipeline parallel air inlet pipeline are arranged at the top of the filtering tank, a pipeline parallel water inlet pipeline and a pipeline parallel backwashing drainage pipeline are arranged at the bottom of the filtering tank, electrically operated valves are arranged on the water inlet pipeline, the backwashing drainage pipeline, the water outlet pipeline and the air inlet pipeline, a supporting net is arranged in the filtering tank, and a quartz sand filtering material is laid on the supporting net; the filter tank is provided with a trigger pipeline at the lower part of the supporting net; the other side of the trigger pipeline is connected with a trigger. The utility model has the beneficial effects that the static pressure of filtered water is used for backwashing the filter layer, backwashing equipment is saved, a large amount of backwashing water is saved, the structure is simple, the backwashing process is started by arranging the trigger, the backwashing effect is good, filtering and backwashing are integrated, the equipment investment is saved, and the backwashing pressure is adjustable.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated filtering device. Background Art

[0002] At present, many breakthroughs have been made in the use of geothermal heat to obtain energy. After extracting hot water from the geothermal layer for energy exchange, it needs to be injected back into the formation to maintain the formation pressure and circulate heat. The formation water needs to be simply processed when it is injected back. The main reason is that some sand is carried with it when the formation water is extracted. This sand needs to be filtered before it can be injected back. The current filtration equipment mainly filters sewage and uses large-flow backwash water and backwash pumps in the design. It is not suitable for filtering formation water and wastes water resources and equipment investment.

[0003] Publication No. CN 221713657 U discloses an integrated filtering device, which records that: when the liquid level in the filter cartridge 1 reaches the height of the overflow pipe 10, the liquid pressure pushes the piston 12 down, and the roller 16 approaches the limit switch 15. The limit switch 15 is actuated, closing the electric valve of the water inlet pipe 5 and opening the electric valve of the backwash drain pipe 7. This technical solution does not clearly explain the relationship between the liquid level reaching the height of the overflow pipe 10 to trigger the limit switch action and the degree of filter media contamination in the filter cartridge. In actual production, the increase in water inlet pressure represents the degree of filter media clogging and contamination. Utility Model Content

[0004] In order to solve the problem that common filtering equipment is not suitable for formation water reinjection filtering, the utility model provides an integrated filtering device.

[0005] The technical solution provided by the utility model is: an integrated filtering device, including a filter tank, a water outlet pipe and an air inlet pipe are connected in parallel at the top of the filter tank, a water inlet pipe and a backwash drainage pipe are connected in parallel at the bottom of the filter tank, electric valves are provided on the water inlet pipe, the backwash drainage pipe, the water outlet pipe and the air inlet pipe, a support net is provided in the filter tank, and quartz sand filter material is laid on the support net;

[0006] The filter tank is provided with a trigger pipe at the lower part of the support net, and the other side of the trigger pipe is connected to the trigger. The trigger includes a cylinder sleeve, which is arranged vertically. A threaded interface is provided at the lower part of the cylinder sleeve to connect the trigger pipe. A piston is provided in the cylinder sleeve, and the piston is connected to the cylinder sleeve through a sealing ring. The upper part of the cylinder sleeve is connected to the pressure cover by bolts, and the upper part of the piston is fixedly connected to the lifting rod. A through hole is provided on the pressure cover, and the lifting rod extends upward through the through hole of the pressure cover. A compression spring is provided between the piston and the pressure cover, and a bracket is provided on the pressure cover. A travel switch is installed on the bracket. The travel switch is a contact linear movement type, and the contact of the travel switch is located above the lifting rod.

[0007] The bracket is divided into an upper bracket and a lower bracket, and the upper bracket and the lower bracket are connected by bolts, wherein the upper bracket is provided with a long hole in the upper and lower directions at the position of the connecting bolts.

[0008] The beneficial effects of the utility model are as follows: the utility model utilizes the static pressure of the filtered water to backwash the filter layer, eliminating the need for backwashing equipment and saving a large amount of backwashing water. The structure is simple, and by setting a trigger, the backwash process is started when the water inlet pressure increases. The backwashing effect is good, and the utility model integrates filtration and backwashing, saving equipment investment, and the backwashing pressure is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attachment Figure 1 It is a structural diagram of the utility model;

[0010] Attachment Figure 2 It is a structural diagram of the trigger in the utility model.

[0011] In the figure, 1-filter tank, 2-water inlet pipe, 3-backwash drainage pipe, 4-water outlet pipe, 5-air inlet pipe, 6-pressure cover, 7-trigger pipe, 8-trigger, 9-support net, 10-quartz sand filter material, 11-cylinder sleeve, 12-piston, 13-compression spring, 14-lifting rod, 15-travel switch, 16-upper bracket, 17-lower bracket, 18-long hole, 19-threaded interface. DETAILED DESCRIPTION

[0012] like Figures 1-2 As shown, an integrated filtering device includes a filter tank 1, a water outlet pipe 4 and an air inlet pipe 5 are connected in parallel at the top of the filter tank 1, a water inlet pipe 2 and a backwash drainage pipe 3 are connected in parallel at the bottom of the filter tank 1, electric valves are provided on the water inlet pipe 2, the backwash drainage pipe 3, the water outlet pipe 4 and the air inlet pipe 5, a support net 9 is provided in the filter tank 1, and a quartz sand filter material 10 is laid on the support net 9;

[0013] The filter tank 1 is provided with a trigger pipe 7 at the lower part of the support net 9, and the other side of the trigger pipe 7 is connected to the trigger 8. The trigger 8 includes a cylinder sleeve 11, which is arranged vertically. A threaded interface 19 is provided at the lower part of the cylinder sleeve 11 to connect the trigger pipe 7. A piston 12 is provided in the cylinder sleeve 11, and the piston 12 is connected to the cylinder sleeve 11 through a sealing ring. The upper part of the cylinder sleeve 11 is connected to the pressure cover 6 by bolts, and the upper part of the piston 12 is fixedly connected to the lifting rod 14. A through hole is opened on the pressure cover 6, and the lifting rod 14 extends upward through the through hole of the pressure cover 6. A compression spring 13 is provided between the piston 12 and the pressure cover 6. A bracket is provided on the pressure cover 6, and a travel switch 15 is installed on the bracket. The travel switch 15 is a contact linear movement type, and the contact of the travel switch 15 is located above the lifting rod 14.

[0014] During normal filtration, the filter tank 1 is filled with water, of which the water above the quartz sand filter material 10 is the treated filtered water. When the water inlet pressure increases, it means that the quartz sand filter material 10 is clogged and contaminated. When the water inlet pressure increases to the set value, the water inlet pressure overcomes the resistance of the compression spring 13 to make the piston 12 rise, and the lifting rod 14 rises to trigger the travel switch 15 to act. The control system closes the electric valves of the water inlet pipe 2 and the water outlet pipe 4, and opens the electric valves of the air intake pipe 5 and the backwash drain pipe 3. The filtered water above the quartz sand filter material 10 flows out from the backwash drain pipe 3 under the action of gravity, and the quartz sand filter material 10 is backwashed. It integrates filtration and backwashing, saving equipment investment and water resources.

[0015] The bracket is divided into an upper bracket 16 and a lower bracket 17, and the upper bracket 16 and the lower bracket 17 are connected by bolts. The upper bracket 16 has a long hole 18 in the upper and lower directions at the position of the connecting bolts. By adjusting the position of the upper bracket 16 in the upper and lower directions, the distance between the travel switch 15 and the lifting rod 14 can be adjusted, and the water inlet pressure value when triggering backwash can be adjusted.

[0016] The utility model utilizes the static pressure of filtered water to backwash the filter layer, eliminating the need for backwashing equipment and saving a large amount of backwashing water. The utility model has a simple structure and starts the backwashing process by setting a trigger 8. The backwashing effect is good, and the utility model integrates filtration and backwashing into one, saving equipment investment and having an adjustable backwashing pressure.

Claims

1. An integrated filtering device, comprising a filter tank (1), characterized in that: The top of the filter tank (1) is provided with a water outlet pipe (4) and an air inlet pipe (5) connected in parallel, and the bottom of the filter tank (1) is provided with a water inlet pipe (2) and a backwash drainage pipe (3) connected in parallel. Electric valves are provided on the water inlet pipe (2), the backwash drainage pipe (3), the water outlet pipe (4) and the air inlet pipe (5). A support net (9) is provided in the filter tank (1), and quartz sand filter material (10) is laid on the support net (9); The filter tank (1) is provided with a trigger pipe (7) at the lower part of the support net (9), and the other side of the trigger pipe (7) is connected to the trigger (8). The trigger (8) includes a cylinder sleeve (11), which is arranged vertically. The lower part of the cylinder sleeve (11) is provided with a threaded interface (19) connected to the trigger pipe (7). A piston (12) is provided in the cylinder sleeve (11), and the piston (12) is connected to the cylinder sleeve (11) through a sealing ring. The upper part of the cylinder sleeve (11) is connected to the pressure cover (6) through bolts. The upper part of the piston (12) is fixedly connected to the lifting rod (14). The pressure cover (6) is provided with a through hole. The lifting rod (14) extends upward through the through hole of the pressure cover (6). A compression spring (13) is provided between the piston (12) and the pressure cover (6). The pressure cover (6) is provided with a bracket. A travel switch (15) is installed on the bracket. The travel switch (15) is a contact linear movement type. The contact of the travel switch (15) is located above the lifting rod (14).

2. The integrated filtering device according to claim 1, characterized in that: The bracket is divided into an upper bracket (16) and a lower bracket (17). The upper bracket (16) and the lower bracket (17) are connected by bolts. The upper bracket (16) is provided with a long hole (18) in the upper and lower directions at the position of the connecting bolts.

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