CN116328380A - Air-water back flushing filter tank and back flushing method - Google Patents

Abstract

The invention discloses a gas-water back flushing filter tank and a back flushing method, the gas-water back flushing filter tank comprises a filter tank, the top of the filter tank is fixedly connected with a top plate, the middle of the top plate is inserted with an exhaust pipe, the interior of the filter tank is divided into a clean water tank and a purification tank by a conical partition plate, the bottom of an inner cavity of the purification tank is fixedly connected with a filter plate, a plurality of communicating vertical pipes are inserted on the surface of the filter plate, a filter material layer is paved on the top of the communicating vertical pipes, one side of the bottom of the inner cavity of the purification tank is fixedly connected with a water suction pump by a pipeline, the top of a mixing cavity is provided with an air inlet groove, the inner cavity of the air inlet groove is fixedly provided with a back flushing water pump, one end of the mixing cavity is fixedly connected with a flushing electromagnetic valve by a pipeline, and one side of the bottom of the clean water tank is fixedly connected with a sewage pipe.

Description

Air-water back flushing filter tank and back flushing method

Technical Field

The invention relates to the technical field of water purifying equipment, in particular to a gas-water back flushing filter tank and a back flushing method.

Background

The gravity valveless filter tank is named because the gravity of water is used for automatically flowing into the filter tank for filtering or backwashing in the filtering process, and the filter tank is provided with no valve, and the principle is that raw water with a certain turbidity enters a filter material layer through a high-level water inlet distribution groove from a water inlet pipe through a baffle plate, and filtered water enters a water tank from a communication channel and is discharged from a water outlet pipe to purify the water. The filter layer continuously intercepts suspended matters, so that the resistance of the filter layer is gradually increased, the filtering speed is gradually reduced, the water level at the upper part of the filter layer is continuously increased, the water is gradually filled into the siphon tube and is increased by the siphon rising tube, when the water level reaches the siphon auxiliary tube orifice, the water rapidly falls from the siphon auxiliary tube, and air in the siphon tube is pumped away to form vacuum in the tube, and the water level in the siphon rising tube continuously rises. At this time, the siphon down pipe sucks water in the water seal well to a certain height, when the water in the siphon up pipe is combined with the water in the siphon down pipe, the siphon is formed, the water flow is flushed out of the pipe orifice and flows into the water seal well to be discharged, and back flushing is started.

The gravity valveless filtering pool back flushing mode is to back flush the filtering material by utilizing the siphon principle and relying on the gravity flow of clear water in the water tank, so that a back flushing water pump or a back flushing water tower is not required to be arranged.

Gravity valveless filtration tanks, while having some of their advantages, also have the following disadvantages:

1. because the liquid level of clear water in the water tank is limited, the height of the siphon is limited, the strength of backflushing is also limited, the gravity valveless filter tank is gradually blocked along with the increase of the service period, hardening is easy to form, perforations are formed when serious, and the like, the flushing effect during backflushing is greatly weakened, the synchronous filtration is shortened, and the quality of filtered water is greatly reduced;

2. once the filter material is disordered, hardened or perforated, the supporting layer or the sand layer must be replaced completely, and the replacement cost is high;

3. the filtering and back flushing processes cannot be directly seen, and the sand layer or the leakage head or the leakage plate cannot be easily found when the sand layer or the leakage head or the leakage plate is in a problem, so that the sand layer or the leakage head or the leakage plate is inconvenient to treat in time.

Thus, a back-flushing filtering tank and a back-flushing method for the air and water are provided.

Disclosure of Invention

The invention aims to provide a gas-water back flushing filter tank and a back flushing method, which are used for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a gas-water back flush filtering ponds, includes the filtering pond, the top fixedly connected with roof of filtering pond, the middle part of roof alternates there is the blast pipe, one side fixedly connected with water distribution tank of roof, one side of water distribution tank bottom has the upper water valve through pipeline fixed intercommunication, the inside of filtering pond divides into clean water basin and purifying tank through the toper baffle, the bottom fixedly connected with filter plate of purifying tank inner chamber, the surface of filter plate alternates there are a plurality of intercommunication standpipe, the filter material layer has been laid at the top of filter plate, one side of purifying tank inner chamber bottom has the suction pump through pipeline fixed intercommunication, one side fixedly connected with mounting plate of filtering pond bottom, the top fixedly connected with blending tank of mounting plate, the water pumping tank has been seted up to one side of blending tank inside, the mixing chamber's top has seted up the air inlet tank, the inner chamber fixed mounting of air inlet tank has the backwash water pump, the inner chamber fixed mounting of air inlet tank has the roots fan, the one end of blending chamber has the solenoid valve through pipeline fixed intercommunication, one side of filter plate bottom has the drain pipe fixed intercommunication, drain pipe fixed one end has the drain solenoid valve.

Preferably, one end of the upper water solenoid valve extends to the top of the inner cavity of the purifying tank through a pipeline, and the bottom of the exhaust pipe extends to the inner cavity of the purifying tank through the conical partition plate.

Preferably, one end of the water suction pump is fixedly communicated with a Z-shaped water inlet pipe, and one end of the Z-shaped water inlet pipe penetrates into the inner cavity of the clean water tank.

Preferably, the output end of the back flush water pump is communicated with the inner cavity of the mixing cavity, and the input end of the back flush water pump is fixedly communicated with the bottom of the clean water tank through a water pipe.

Preferably, one end of the flushing electromagnetic valve is communicated with the bottom end of the inner cavity of the purifying tank through a pipeline, and the top of the communicating vertical pipe is fixedly communicated with a nozzle.

Preferably, the bottom of the inner cavity of the air inlet groove is communicated with the inner cavity of the mixing cavity through a one-way air inlet valve, and one side of the top of the water distribution tank is fixedly communicated with a raw water pipe.

Preferably, a control box is fixedly arranged on one side of the top of the filter tank, and the water feeding valve, the water suction pump, the back flushing water pump, the Roots blower, the flushing electromagnetic valve and the sewage electromagnetic valve are electrically connected with an external power supply through the control box.

Preferably, the filter material layer is a homogeneous quartz sand filter material, the particle size of the quartz sand filter material is 0.9mm, and the paving thickness of the quartz sand filter material is 900mm.

The back flushing method of the filter tank comprises the following steps:

s1: controlling the opening and closing of the valves, firstly controlling the closing of the water feeding electromagnetic valve and the water suction pump, and then controlling the opening of the flushing electromagnetic valve and the pollution discharge electromagnetic valve;

s2: the air and water are mixed, the back flush water pump and the Roots blower are controlled to work, the back flush water pump pumps part of water purified by the inner cavity of the clean water tank to the inner cavity of the mixing cavity through the back flush water pump, and the Roots blower pumps outside air to the inner cavity of the mixing cavity to be mixed with the water;

s3: carrying out gas-water mixture conveying and backwashing of the filter material layer, enabling the mixed gas-water mixture to enter an inner cavity of a communicating vertical pipe through a pipeline, and then spraying out from a nozzle at the top of the communicating vertical pipe, so that the filter material layer is backwashed uniformly;

s4: discharging flushing impurities; the gas after flushing is discharged outdoors through the clean water tank, and the water after flushing is doped with impurities and is discharged from the sewage pipe.

Compared with the prior art, the invention has the beneficial effects that:

(1) The filter material is greatly vibrated in a water-gas mixture flushing mode, the filter material repeatedly collides and rubs, the stirring of the filter material layer is fierce, the structure of mud balls in the filter material can be destroyed, the flushing effect is improved, the filter material loss phenomenon is not easy to occur due to low strength of water flushing, water in flushing is saved, the filter material replacement times are reduced, the water production cost is reduced, and the economic benefit of a water plant is improved;

(2) The recoil strength is regulated by means of the strength of the water pump and the Roots blower, and the recoil strength is balanced;

(3) The filter material layer is a homogeneous quartz sand filter material, the grain diameter of the quartz sand filter material is 0.9mm, the spreading thickness of the quartz sand filter material is 900mm, so that the filtering speed is uniform, the problem of messy layers of the original filter material and the supporting layer is solved by adopting the homogeneous quartz sand filter material, and the filter material only needs to be replenished after the filter is used for a period of time without complete replacement, so that the waste of the sand filter material and the trouble of manual sand replacement are greatly reduced;

(4) The air-water mixture is evenly sprayed out through the nozzles on the communicating vertical pipes, so that the filter material has no back flushing dead angle during back flushing, the back flushing is thorough, the dirt interception capacity of the filter material filtering layer is high, the time interval of back flushing is greatly prolonged, and the quality of filtered water is fully improved.

Drawings

FIG. 1 is a cross-sectional view of a filter according to the invention;

FIG. 2 is a cross-sectional view of the mixing tank of the present invention;

FIG. 3 is a side view of a communication stack of the present invention;

fig. 4 is a path diagram of the present invention.

In the figure: 1. a filter tank; 2. a top plate; 3. an exhaust pipe; 4. a water distribution tank; 5. a water feeding valve; 6. a conical partition; 7. a clean water tank; 8. a purifying tank; 9. a filter plate; 10. a communicating vertical pipe; 11. a filter material layer; 12. a water pump; 13. a Z-shaped water inlet pipe; 14. a mounting base plate; 15. a mixing box; 16. a water pumping tank; 17. a mixing chamber; 18. an air inlet groove; 19. back flushing the water pump; 20. roots blower; 21. a one-way air inlet valve; 22. flushing the electromagnetic valve; 23. a water pipe; 24. a blow-down pipe; 25. a blowdown solenoid valve; 26. a raw water pipe; 27. a nozzle; 28. and a control box.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-4, the invention provides a gas-water back flushing filter tank, which comprises a filter tank 1, wherein the top of the filter tank 1 is fixedly connected with a top plate 2, the middle part of the top plate 2 is inserted with an exhaust pipe 3, one side of the top plate 2 is fixedly connected with a water distribution tank 4, one side of the bottom of the water distribution tank 4 is fixedly communicated with a water feeding electromagnetic valve 5 through a pipeline, the interior of the filter tank 1 is divided into a clean water tank 7 and a purifying tank 8 through a conical partition 6, the bottom of the inner cavity of the purifying tank 8 is fixedly connected with a filter plate 9, the surface of the filter plate 9 is inserted with a plurality of communicating vertical pipes 10, the top of the filter plate 9 is paved with a filter material layer 11, one side of the bottom of the inner cavity of the purifying tank 8 is fixedly communicated with a water suction pump 12 through a pipeline, one side of the bottom of the filter tank 1 is fixedly connected with a mounting bottom plate 14, the top of the mounting bottom plate 14 is fixedly connected with a mixing tank 15, one side of the interior of the mixing tank 15 is provided with a water suction tank 16, the other side of the interior of the mixing tank 15 is provided with a mixing cavity 17, the top of the mixing cavity 17 is provided with an air inlet groove 18, the inner cavity of the water suction tank 16 is fixedly provided with a back flushing water pump 19, the inner cavity of the air inlet tank 18 is fixedly provided with a Roots 20, one end of the inner cavity of the mixing cavity 17 is fixedly communicated with a sewage draining pipe 25 is fixedly communicated with a sewage draining electromagnetic valve 24, one side of the sewage draining electromagnetic valve is fixedly connected with the sewage draining electromagnetic valve 24 is connected with the sewage draining electromagnetic valve 25.

One end of the upper water solenoid valve 5 extends to the top of the inner cavity of the purifying tank 8 through a pipeline, and the bottom of the exhaust pipe 3 extends to the inner cavity of the purifying tank 8 through the conical partition plate 6.

One end of the water suction pump 12 is fixedly communicated with a Z-shaped water inlet pipe 13, and one end of the Z-shaped water inlet pipe 13 penetrates into the inner cavity of the clean water tank 7.

The output end of the back flush water pump 19 is communicated with the inner cavity of the mixing cavity 17, and the input end of the back flush water pump 19 is fixedly communicated with the bottom of the clean water tank 7 through a water pipe 23.

One end of the flushing solenoid valve 22 is communicated with the bottom end of the inner cavity of the purifying tank 8 through a pipeline, and a nozzle 27 is fixedly communicated with the top of the communicating vertical pipe 10.

The bottom of the inner cavity of the air inlet groove 18 is communicated with the inner cavity of the mixing cavity 17 through a one-way air inlet valve 21, and one side of the top of the water distribution tank 4 is fixedly communicated with a raw water pipe 26.

One side of the top of the filter tank 1 is fixedly provided with a control box 28, and the water feeding valve 5, the water suction pump 12, the back flushing water pump 19, the Roots blower 20, the flushing electromagnetic valve 22 and the sewage electromagnetic valve 25 are electrically connected with an external power supply through the control box 28.

The filter material layer 11 is a homogeneous quartz sand filter material, the particle size of the quartz sand filter material is 0.9mm, and the paving thickness of the quartz sand filter material is 900mm.

The back flushing method of the filter tank comprises the following steps:

s1: the opening and closing of the valves are controlled, firstly, the closing of the water feeding valve 5 and the water suction pump 12 is controlled, and then, the opening of the flushing electromagnetic valve 22 and the pollution discharging electromagnetic valve 25 is controlled;

s2: the air and water are mixed, the back flush water pump 19 and the Roots blower 20 are controlled to work, the back flush water pump 19 pumps part of water purified by the inner cavity of the clean water tank 7 to the inner cavity of the mixing cavity 17 through the back flush water pump 19, and the Roots blower 20 pumps outside air to the inner cavity of the mixing cavity 17 to be mixed with the water;

s3: carrying out gas-water mixture conveying and back flushing of the filter material layer 11, enabling the mixed gas-water mixture to enter the inner cavity of the communicating vertical pipe 10 through a pipeline, and then spraying out from a nozzle 27 at the top of the communicating vertical pipe 10, so as to evenly back flush the filter material layer 11;

s4: discharging flushing impurities; the gas after flushing is discharged to the outside through the clean water tank 7, and the water after flushing is discharged from the drain pipe 24 doped with impurities.

When the water purifier is specifically used, when water quality is purified, the water feeding solenoid valve 5 and the water suction pump 12 are firstly opened, the flushing solenoid valve 22 and the pollution discharge solenoid valve 25 are closed, raw water is conveyed to the inner cavity of the water distribution tank 4 through the raw water pipe 26 and falls into the top of the inner cavity of the purifying tank 8 through the water feeding solenoid valve 5, raw water gradually permeates out of the filter material layer 11 through self gravity, so that the water quality is filtered, and the filtered water enters the inner cavity of the clean water tank 7 through the water suction pump 12 and the Z-shaped water inlet pipe 13 for storage, so that the water quality is purified;

when the filter material layer 11 needs to be backwashed, the water feeding electromagnetic valve 5 and the water suction pump 12 are closed, the flushing electromagnetic valve 22 and the pollution discharge electromagnetic valve 25 are opened, at the moment, the purified water in the inner cavity of the clean water tank 7 is conveyed to the inner cavity of the mixing cavity 17 through the pumping of the backwashing water pump 19, meanwhile, the Roots blower 20 conveys outside air to the inner cavity of the mixing cavity 17 through the one-way air inlet valve 21, the water in the inner cavity of the mixing cavity 17 and the air are mixed and then discharged to the inner cavity of the communicating vertical pipe 10 through the flushing electromagnetic valve 22, the water-air mixture is uniformly sprayed out through the nozzle 27 on the communicating vertical pipe 10, thereby backwashed the filter material layer 11, the purified water is flushed, the filter material layer 11 is backwashed under the optimal condition, water and energy are saved, the water quality can be improved, the interception capacity of the filter material layer 11 is increased, the filtering speed is improved, the filter material is greatly vibrated in the flushing mode of the water-air mixture, the repeated collision friction is generated during the air flushing, the structure of mud balls in the filter material is destroyed, the backwashed effect is improved, the strength of the backwashed filter material is low, the water is difficult to be lost, the water is sprayed out, the backwashed is also the backwashed water is uniform through the nozzle 27, the backwashed strength is regulated, the backwashed strength is uniform, the air-water-air mixture is completely is blown out by the water-water mixture is adjusted, and the air blower is completely, the backwashed is completely and the backwashed is adjusted, the backwashed is the air water is the air has the water is completely and has the same and has good water quality.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims (8)

1. The air-water back flush filter tank comprises a filter tank (1), and is characterized in that: the top fixedly connected with roof (2) of filtering pond (1), the middle part of roof (2) is interluded and is had blast pipe (3), one side fixedly connected with distribution box (4) of roof (2), one side of distribution box (4) bottom is through pipeline fixedly connected with water feeding valve (5), the inside of filtering pond (1) is divided into clean water basin (7) and purifying tank (8) through toper baffle (6), the bottom fixedly connected with filter plate (9) of purifying tank (8) inner chamber, the surface of filter plate (9) is interluded and is had a plurality of intercommunication standpipe (10), filter layer (11) have been laid at the top of filter plate (9), one side of purifying tank (8) inner chamber bottom is through pipeline fixedly connected with suction pump (12), one side fixedly connected with mounting plate (14) of filter chamber (1) bottom, top fixedly connected with mixing box (15) of mounting plate (14), one side of mixing box (15) inside is seted up water tank (16), the opposite side of mixing box (15) inside is seted up and is had mixing chamber (17), mixing chamber (19) are had suction pump (16) to be equipped with back flush tank (19), the inner cavity of the air inlet groove (18) is fixedly provided with a Roots blower (20), one end of the mixing cavity (17) is fixedly communicated with a flushing electromagnetic valve (22) through a pipeline, one side of the bottom of the clean water tank (7) is fixedly communicated with a drain pipe (24), and one end of the drain pipe (24) is fixedly communicated with a drain electromagnetic valve (25).

2. The air-water backwash filter tank according to claim 1 wherein: one end of the upper water solenoid valve (5) extends to the top of the purifying tank (8) through a pipeline, and the bottom of the exhaust pipe (3) penetrates through the conical partition plate (6) to extend to the inner cavity of the purifying tank (8).

3. The air-water backwash filter tank according to claim 1 wherein: one end of the water suction pump (12) is fixedly communicated with a Z-shaped water inlet pipe (13), and one end of the Z-shaped water inlet pipe (13) penetrates into the inner cavity of the clean water tank (7).

4. The air-water backwash filter tank according to claim 1 wherein: the output end of the back flush water pump (19) is communicated with the inner cavity of the mixing cavity (17), and the input end of the back flush water pump (19) is fixedly communicated with the bottom of the clean water tank (7) through a water delivery pipe (23).

5. The air-water backwash filter tank according to claim 1 wherein: one end of the flushing electromagnetic valve (22) is communicated with the bottom end of the inner cavity of the purifying tank (8) through a pipeline, and a nozzle (27) is fixedly communicated with the top of the communicating vertical pipe (10).

6. The air-water backwash filter tank according to claim 1 wherein: the bottom of the inner cavity of the air inlet groove (18) is communicated with the inner cavity of the mixing cavity (17) through a one-way air inlet valve (21), and one side of the top of the water distribution tank (4) is fixedly communicated with a raw water pipe (26).

7. The air-water backwash filter tank according to claim 1 wherein: one side of the top of the filter tank (1) is fixedly provided with a control box (28), and the water feeding valve (5), the water suction pump (12), the back flushing water pump (19), the Roots blower (20), the flushing electromagnetic valve (22) and the pollution discharge electromagnetic valve (25) are electrically connected with an external power supply through the control box (28).

8. The air-water backwash filter tank according to claim 1 wherein: the filter material layer (11) is a homogeneous quartz sand filter material, the particle size of the quartz sand filter material is 0.9mm, and the paving thickness of the quartz sand filter material is 900mm.

The back flushing method of the filter tank is characterized in that: the method comprises the following steps:

s1: the opening and closing of the valves are controlled, firstly, the closing of the water feeding valve (5) and the water suction pump (12) is controlled, and then, the opening of the flushing electromagnetic valve (22) and the pollution discharging electromagnetic valve (25) is controlled;

s2: the air and water are mixed, the work of a back flush water pump (19) and a Roots blower (20) is controlled, the back flush water pump (19) pumps part of water purified by the inner cavity of the clean water tank (7) to the inner cavity of the mixing cavity (17) through the back flush water pump (19), and the Roots blower (20) pumps the external air to the inner cavity of the mixing cavity (17) to be mixed with the water;

s3: carrying out gas-water mixture conveying and back flushing of the filter material layer (11), enabling the mixed gas-water mixture to enter the inner cavity of the communicating vertical pipe (10) through a pipeline, and then spraying out from a nozzle (27) communicated with the top of the vertical pipe (10), so as to evenly back flush the filter material layer (11);

s4: and (3) discharging flushing impurities, wherein the gas after flushing is discharged outdoors through a clean water tank (7), and the water after flushing is doped with the impurities and is discharged from a sewage discharge pipe (24).

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