CN110812941A

CN110812941A - Water purification and filtration system capable of reducing backwashing water consumption

Info

Publication number: CN110812941A
Application number: CN201911294213.9A
Authority: CN
Inventors: 李满桃; 潘能志; 韦舜毅; 杨洁; 杨耀宗
Original assignee: Hualan Design (group) Co Ltd
Current assignee: Hualan Design (group) Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-02-21

Abstract

A water purification and filtration system for reducing backwashing water consumption comprises a filtration tank, wherein the front end of the filtration tank is provided with a water inlet tank and a emptying tank; the water inlet tank is communicated with a water inlet pipe and is communicated with the filter tank through a water inlet butterfly valve; the emptying pool is provided with a drain pipe; the lower part of the filter tank is provided with a filter plate through a filter plate supporting beam, the filter plate is provided with a plurality of short-handle filter heads, and a filter material layer is placed on the filter plate; a U-shaped drainage channel is arranged above the filter material layer and is communicated with the emptying pool through a drainage butterfly valve; a water outlet pipe is arranged at the lower part of the rear end of the filter tank; the back end of the filter tank is provided with a back flush operation room, a water collecting tank and a water outlet water seal well; the water outlet water seal well is communicated with the water collecting tank; the water collecting tank is provided with a clear water pipe and a back flush water supply pipe; the water outlet water seal well is communicated with a water outlet pipe through a water outlet valve and a water pipe; the water outlet pipe is also connected with a back flush water inlet pipe through a water inlet valve; the lower part of the filter tank is communicated with a back-washing air inlet pipe. This system still saves the backwash water when guaranteeing that quality of water is stable up to standard.

Description

Water purification and filtration system capable of reducing backwashing water consumption

Technical Field

The invention relates to the technical field of water treatment of water plants, in particular to a water purification and filtration system for reducing the consumption of backflushing water and improving the flushing effect of a small water purification plant.

Background

The water producing process in water plant consists of flocculation, precipitation, filtering, disinfection, etc. the filtering pond is the last step of conventional water purifying structure treatment, and the quality of the filtering pond directly affects the effluent quality of the water plant. With the issuance of new standards for quality of drinking water by the ministry of health and the ministry of construction of China, domestic water supply enterprises will improve the quality of the outlet water as the first major thing. In the purification process of drinking water, the filtration not only aims at further reducing the turbidity of the water, but also partially removes organic matters, bacteria, viruses and the like in the water along with the reduction of the turbidity of the water, and the filtration is an important measure for improving the quality of outlet water and ensuring the sanitary safety of the drinking water. The back flushing of the filter tank is a key step in the whole filtering project, and the good flushing technology can not only effectively remove the accumulated mud in the filtering layer and restore the ideal filtering function of the filter tank, but also prolong the filtering period, save the flushing water and reduce the energy consumption.

In the process, suspended matters, colloid and other impurity components in the water are adsorbed by the filter material or are separated and removed by gaps, and the water becomes clean. Meanwhile, due to the continuous filtering, the space for accommodating dirt between the filtering layers is gradually reduced, the head loss of the filtered water is increased, and the filtered water is less and less until the filtering is failed. Therefore, the filter material needs to be cleaned by back washing, and the filtering function of the filter layer is recovered. The existing filter tanks have the problems of high backwashing water consumption, incomplete filter tank washing, poor backwashing effect and the like.

Disclosure of Invention

The invention aims to provide a water purification and filtration system for reducing backwashing water consumption, which better absorbs the operation advantages of a double-valve filter tank, a V-shaped filter tank and a siphon filter tank, ensures that the water quality is stable and reaches the standard, and saves backwashing water.

The technical scheme adopted by the invention is as follows:

a purified water filtering system for reducing backwashing water consumption comprises two filtering ponds, wherein the two filtering ponds are arranged in parallel; a water inlet tank is arranged at the upper part of the front end of the filtering tank, and an emptying tank is arranged at the lower part of the front end of the filtering tank; the upper part of the water inlet tank is communicated with a water inlet pipe from the sedimentation tank, and the lower part of the water inlet tank is communicated with the filter tank through a water inlet butterfly valve; the bottom of the emptying pool is provided with a drain pipe; the lower part of the filter tank is provided with a filter plate through a filter plate supporting beam provided with a plurality of uniform water holes, the filter plate is provided with a plurality of short-handle filter heads, and the short-handle filter heads can be purchased and installed; a filter material layer is arranged above the filter plate; a U-shaped drainage channel is arranged above the filter material layer, two ends of the U-shaped drainage channel are respectively fixed at the front end and the rear end of the filter tank, and the front end of the U-shaped drainage channel is communicated with the emptying tank through a drainage butterfly valve; a water outlet pipe is arranged at the rear end of the filter tank at the lower part of the filter plate; a back washing operation room is arranged at the upper part of the rear end of the filtering tank, a water collecting tank is arranged at the lower part of the rear end, and a water outlet water sealing well is also arranged at the rear end of the filtering tank; the water outlet water seal well is communicated with the water collecting tank; the water collecting tank is respectively provided with a clear water pipe for conveying water to the clear water tank and a back washing water supply pipe between the water conveying and back washing devices; the water outlet water seal well is communicated with a water outlet pipe through a water outlet valve and a water pipe; the water outlet pipe is also connected with a back-flushing water inlet pipe through a water inlet valve, and the back-flushing water inlet pipe is connected with a back-flushing water pump; a back-flushing air inlet pipe is arranged in the back-flushing operation room and is connected with a back-flushing inflator pump, and the back-flushing air inlet pipe is communicated to a filtering tank at the lower part of the filtering plate.

Preferably: the bottom of the water inlet tank is communicated with the emptying tank through an emptying pipe provided with a valve, so that water in the water inlet tank can be conveniently emptied.

Preferably: the rear part of the water outlet end of the water inlet butterfly valve is provided with a water baffle which can prevent water from directly rushing into the filter tank; the rear portion of breakwater still is provided with the intake antrum, enters into the intake antrum after the breakwater is submerged to the water of following the butterfly valve exhaust of intaking, and the intake antrum water overflows again after full in the filtering ponds, avoids the water that gets into directly to wash into the filtering ponds, erodees the filter material surface, prevents that the uneven short current that appears of filter material thickness.

Preferably: and a drainage trench is arranged on the ground of the backwashing operation room and is used for draining accumulated water in the backwashing operation room.

Preferably: a manhole is arranged between the backwashing operation rooms, so that monitoring and maintenance of workers are facilitated.

Preferably: the bottom of the filtering tank is communicated with the emptying tank through an emptying pipe provided with a valve, so that the water in the filtering tank can be emptied.

Preferably: the filter material layer is composed of a quartz sand filter material layer and an anthracite or activated carbon filter material layer, and the anthracite or activated carbon filter material layer is positioned on the quartz sand filter material layer.

The filtering area of the single-lattice filtering pool of the system adopts a square mode that the side length is not more than 6 meters, and the optimal side length is 3-5 meters, and the backwashing water pool is flexibly built with the filtering pool or separately built. The thickness of the filter material layer is controlled to be 1200 mm; the U-shaped drainage channel is arranged 500mm higher than the surface of the filter material.

The system adopts a standard filtering control process as follows: water is input through a water input butterfly valve → water distribution of a water distribution weir → filtration → water output of a water input valve → normal filtration → water output of a water output water seal well; the system adopts a standard backwash control flow as follows: closing a water inlet butterfly valve → starting air blast of a blower → normal air blast → starting a back flushing water pump, opening a drainage butterfly valve → normal air water back flushing → closing an air inlet valve (simultaneously opening an air inlet valve of the next lattice filter) → single water flushing (starting air blast of the next lattice filter) → closing a back flushing water inlet valve (simultaneously opening a back flushing water inlet valve of the next lattice filter) → back flushing finishing (entering a single water flushing stage of the next lattice filter and then entering an air blast stage of the next lattice filter), and circulating the steps until the blower and the back flushing water pump are finally flushed and filtering is stopped) → filtering is resumed.

This reduce water purification filtration system's of back flush water consumption advantage:

1. the filter chamber of the system is characterized in that the inflow of water into the filter chamber is controlled by an inflow automatic control butterfly valve, the water is uniformly distributed by a water distribution weir on the front side of the inflow, the water enters the filter chamber main body for filtration, the opening degree of an outflow valve is automatically controlled, the water head such as outflow water well sealing control is used for filtration, after a filtration period, an inflow butterfly valve and an outflow valve are closed, back flushing is started, an inflow air inlet pipe is back flushed with inflation gas, then air water is back flushed, and then the inflow butterfly valve and the outflow valve are. When the air water backflushes, the water discharging butterfly valve is opened to discharge water, and the water inlet butterfly valve is closed, so that the water consumption is reduced. The system avoids the defect of large water consumption of the traditional filter tank by controlling the opening time sequence of the water inlet and outlet gates, and simultaneously avoids the defects of incomplete washing, poor back flushing effect and large water consumption of the traditional siphon filter tank. The operation advantages of the V-shaped filter and the siphon filter are well absorbed, the stable water quality is ensured to reach the standard, the water consumption is low, the energy consumption is low, and the method is suitable for the water purification filtration treatment process. According to statistics, the single back flushing requirement of the filter system is more than one third less than that of the V-shaped filter.

2. The system adopts unique water inlet and outlet, and the U-shaped drainage channel is arranged above the filter material layer, so that the area of the filter material is not occupied; the water inlet of the filter tank is distributed with water through the water baffle and the water inlet tank, so that uniform hydraulic water distribution can be realized, the surface of a filter material is prevented from being washed, short flow caused by uneven thickness of the filter material is prevented, and the phenomenon of unstable water quality of outlet water is avoided.

Drawings

FIG. 1 is a schematic structural diagram of the purified water filtering system for reducing the consumption of backwashing water;

FIG. 2 is a schematic view taken from A-A in FIG. 1;

FIG. 3 is a schematic view of FIG. 1 taken along line B-B;

the names of the sequence numbers in the figure are:

1. the device comprises a filter tank, 2, U-shaped drainage channels, 3, a water inlet tank, 4, an emptying pipe, 5, an emptying tank, 6, a water baffle, 7, a water inlet butterfly valve, 8, a water inlet pipe, 9, a water inlet tank, 10, a blow-down pipe, 11, a drainage butterfly valve, 12, a drainage pipe, 13, a filter plate supporting beam, 14, a water outlet pipe, 15, a water outlet valve, 16, a water passing pipe, 17, a water outlet water seal well, 18, a water collecting tank, 19, a backwashing operation room, 20, a drainage trench, 21, a water inlet valve, 22, a backwashing water inlet pipe, 23, a backwashing water supply pipe, 24, a clean water pipe, 25, a manhole, 26, a backwashing air inlet pipe, 27, a short handle filter head, 28, a filter plate, 29, a filter material layer.

Detailed Description

In order to describe the present invention in more detail, the following description is given with reference to the accompanying drawings.

As shown in the figure, the first and second,

example 1

A purified water filtering system for reducing backwashing water consumption comprises two filtering ponds 1, wherein the two filtering ponds 1 are arranged in parallel; a water inlet tank 9 is arranged at the upper part of the front end of the filtering tank 1, and an emptying tank 5 is arranged at the lower part of the front end; the upper part of the water inlet tank 9 is communicated with a water inlet pipe 8 from the sedimentation tank, and the lower part of the water inlet tank 9 is communicated with the filtering tank 1 through a water inlet butterfly valve 7; the bottom of the emptying pool 5 is provided with a drain pipe 12; the lower part of the filter tank 1 is provided with a filter plate 28 through a filter plate supporting beam 13 provided with a plurality of water equalizing holes 30, the filter plate 28 is provided with a plurality of short handle filter heads 27, and a filter material layer 29 is arranged above the filter plate 28; a U-shaped drainage channel 2 is arranged above the filter material layer 29, two ends of the U-shaped drainage channel 2 are respectively fixed at the front end and the rear end of the filter tank 1, and the front end of the U-shaped drainage channel 2 is communicated with the emptying tank 5 through a drainage butterfly valve 11; a water outlet pipe 14 is arranged at the rear end of the filtering tank 1 at the lower part of the filtering plate 28; a back washing operation room 19 is arranged at the upper part of the rear end of the filtering tank 1, a water collecting tank 18 is arranged at the lower part of the rear end, and a water outlet water seal well 17 is also arranged at the rear end of the filtering tank 1; the effluent water seal well 17 is communicated with a water collecting tank 18; the water collecting tank 18 is respectively provided with a clear water pipe 24 for conveying water to the clear water tank and a back washing water supply pipe 23 for conveying water to the back washing equipment; the water outlet water seal well 17 is communicated with the water outlet pipe 14 through a water outlet valve 15 and a water passing pipe 16; the water outlet pipe 14 is also connected with a back flush water inlet pipe 22 through a water inlet valve 21, and the back flush water inlet pipe 22 is connected with a back flush water pump; a back-flushing air inlet pipe 26 is arranged in the back-flushing operation room 19, the back-flushing air inlet pipe 26 is connected with a back-flushing inflator pump, and the back-flushing air inlet pipe 26 is communicated with the filtering tank 1 at the lower part of the filtering plate 28.

The bottom of the water inlet tank 9 is communicated with the emptying tank 5 through an emptying pipe 4 provided with a valve, so that water in the water inlet tank 9 can be conveniently emptied.

And a drainage trench 20 is arranged on the ground of the backwashing operation room 19 and is used for draining accumulated water in the backwashing operation room 19.

The back washing operation room 19 is provided with a manhole 25, so that monitoring and maintenance of workers are facilitated.

The bottom of the filtering tank 1 is communicated with the emptying tank 5 through an emptying pipe 10 provided with a valve, so that the water in the filtering tank 1 can be emptied.

Example 2

The rear part of the water outlet end of the water inlet butterfly valve 7 is provided with a water baffle 6 which can prevent water from directly rushing into the filter tank 1; the rear portion of breakwater 6 still is provided with intake chamber 3, enters into intake chamber 3 after the breakwater 6 is submerged to the discharged water of butterfly valve 7 from intaking, and 3 water of intake chamber overflows in filtering ponds 1 again after full, avoids the water of entering to directly wash into filtering ponds 1, erodees the filter material surface, prevents that the filter material thickness is uneven to appear the short-term current.

The above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.

Claims

1. The utility model provides a reduce water purification filtration system of back flush water consumption, includes filtering ponds (1), its characterized in that: the filtering ponds (1) are two filtering ponds which are arranged in parallel, a water inlet pond (9) is arranged at the upper part of the front end of each filtering pond (1), and an emptying pond (5) is arranged at the lower part of the front end; the upper part of the water inlet tank (9) is communicated with a water inlet pipe (8) from the sedimentation tank, and the lower part of the water inlet tank (9) is communicated with the filter tank (1) through a water inlet butterfly valve (7); a drain pipe (12) is arranged at the bottom of the emptying pool (5); a filter plate (28) is arranged at the lower part of the filter tank (1) through a filter plate supporting beam (13) provided with a plurality of water equalizing holes (30), a plurality of short handle filter heads (27) are arranged on the filter plate (28), and a filter material layer (29) is arranged above the filter plate (28); a U-shaped drainage channel (2) is arranged above the filter material layer (29), two ends of the U-shaped drainage channel (2) are respectively fixed at the front end and the rear end of the filter tank (1), and the front end of the U-shaped drainage channel (2) is communicated with the emptying tank (5) through a drainage butterfly valve (11); a water outlet pipe (14) is arranged at the rear end of the filtering tank (1) at the lower part of the filtering plate (28); a back washing operation room (19) is arranged at the upper part of the rear end of the filtering tank (1), a water collecting tank (18) is arranged at the lower part of the rear end, and a water outlet water seal well (17) is also arranged at the rear end of the filtering tank (1); the water outlet water seal well (17) is communicated with a water collecting tank (18); the water collecting tank (18) is respectively provided with a clear water pipe (24) for delivering water to the clear water tank and a back flush water supply pipe (23) between the water delivery and back flush equipment; the water outlet water seal well (17) is communicated with the water outlet pipe (14) through a water outlet valve (15) and a water passing pipe (16); the water outlet pipe (14) is also connected with a back flush water inlet pipe (22) through a water inlet valve (21); a back-washing air inlet pipe (26) is arranged in the back-washing operation room (19), and the back-washing air inlet pipe (26) is communicated to the filtering tank (1) at the lower part of the filtering plate (28).

2. The clean water filtration system for reducing backwash water consumption according to claim 1, wherein: the bottom of the water inlet pool (9) is communicated with the emptying pool (5) through an emptying pipe (4) provided with a valve, so that water in the water inlet pool (9) can be conveniently drained to be emptied.

3. The clean water filtration system for reducing backwash water consumption according to claim 1, wherein: a water baffle (6) capable of preventing water from directly rushing into the filter tank (1) is arranged at the rear part of the water outlet end of the water inlet butterfly valve (7); the rear portion of breakwater (6) still is provided with intake antrum (3), enters into intake antrum (3) after breakwater (6) is submerged to discharged water from intake butterfly valve (7), and in intake antrum (3) water overflows filtering ponds (1) again after full, the direct filtering ponds (1) of rushing into of water of avoiding entering washed away the filter material surface, prevents that the uneven short current that appears of filter material thickness.

4. The clean water filtration system for reducing backwash water consumption according to claim 1, wherein: and a drainage trench (20) is arranged on the ground of the backwashing operation room (19) to drain accumulated water in the backwashing operation room (19).

5. The clean water filtration system for reducing backwash water consumption according to claim 1, wherein: the back washing operation room (19) is provided with a manhole (25) which is convenient for monitoring and maintenance by workers.

6. The clean water filtration system for reducing backwash water consumption according to claim 1, wherein: the bottom of the filtering tank (1) is communicated with the emptying tank (5) through an emptying pipe (10) provided with a valve, so that the water in the filtering tank (1) can be emptied.