CN220546630U

CN220546630U - Rapid filtering device for light polluted water

Info

Publication number: CN220546630U
Application number: CN202322061043.8U
Authority: CN
Inventors: 朱光宇
Original assignee: Huatian Engineering and Technology Corp MCC
Current assignee: Huatian Engineering and Technology Corp MCC
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-03-01
Anticipated expiration: 2033-08-02

Abstract

The utility model discloses a rapid filtering device for light polluted water, relates to the technical field of water treatment, and aims to solve the problems that a rainwater filtering device is easy to block and backwash is to be improved; the utility model has the advantages that the two sides of the filter tank are respectively provided with a water inlet area and a filter area, a sundry retention area is arranged between the lower end of the filter area and the bottom of the filter tank and is communicated with the water inlet area, the water inlet area and the filter area are all separated by a baffle, the baffle at the lower end of the filter area is provided with a plurality of water passing holes, the filter area is filled with filter materials, the upper end cover of the filter area is provided with a porous cover plate, and the filter tank is provided with a filter tank blow-down pipe, a water inlet system and a filter tank water outlet pipe; the backwashing system comprises a reservoir, a water outlet pipe of the filter tank is communicated with the reservoir, a submersible pump is arranged in the reservoir and is connected with a backwashing water inlet pipe, a water outlet of the reservoir is connected to the upper part of the filtering area, a water outlet system is arranged on one side of the upper part of the reservoir, and an aeration system is fixedly arranged at the bottom of the filter tank, which is positioned under the filtering area; the utility model can rapidly filter light polluted water, and has good backwashing effect by using aeration assistance.

Description

Rapid filtering device for light polluted water

Technical Field

The utility model relates to the technical field of water treatment, in particular to a rapid filtering device for light polluted water.

Background

Along with the continuous perfection of urban pipe network systems, the river-entering sewage in dry seasons and the overflow sewage in rainy seasons are continuously reduced, and the river-entering sewage in cities mainly comprises surface runoff in rainy seasons and combined overflow in middle and later periods. These wastewater are characterized by relatively low levels of pollution and by greater specific gravity of suspended contaminants. On the premise of effectively treating urban black and odorous water bodies, the development of a treatment device specially aiming at suspended pollutants in light-polluted water bodies is necessary to ensure the rapid recovery of the water quality of the water bodies after rain.

The prior rainwater filtering device is generally easy to block or has poor backwashing effect, for example, the publication number is CN107551668A, and the patent application is named as a low-water-loss rainwater filtering tank, wherein the filtering tank comprises a well body, a cover plate positioned above the well body, and a water inlet pipe and a water outlet pipe positioned on opposite side walls of the well body; a retaining wall longitudinally arranged in the well body; a supporting plate is arranged between the retaining wall and the side wall where the water outlet pipe is positioned; the retaining wall and the supporting plate divide the interior of the well body into: a pre-settling zone between the side wall where the water inlet pipe is positioned and the retaining wall; a filtering area positioned above the supporting plate and a sedimentation area positioned below the supporting plate; the pre-sedimentation area is communicated with the water inlet pipe; the filtering area is communicated with the water outlet pipe; the retaining wall is provided with a water passing groove from the bottom surface of the well body, and the upper end of the retaining wall is provided with an overflow groove from the cover plate; a filter medium is paved above the supporting plate; the supporting plate is provided with water passing holes; although the slag blocking net and the filter medium of the device can play a role in filtering suspended matters in rainwater, a backwash system is not needed, and the problem of easy blockage exists.

And the utility model patent with the publication number of CN213268085U is named as a device for filtering and recycling rainwater for gardens, wherein a rainwater regulating tank and a primary rainwater discarding tank are arranged on one side of the device, a ceramsite filter tank is arranged on the other side of the device, a filter tank water inlet is arranged on the side surface of the top and is communicated with the rainwater regulating tank, ceramsite filter materials are arranged in the ceramsite filter tank, and a water outlet pipe is arranged at the bottom. A backwash drain pipe is arranged on the side surface of the upper part of the ceramsite filter tank and is positioned between the water distribution weir and the ceramsite filter material, a backwash drain valve is arranged on the backwash drain pipe, a backwash water inlet pipe is connected to a water outlet pipe of the ceramsite filter tank, a backwash water inlet valve is arranged on the backwash water inlet pipe, and a backwash water pump is also arranged on the backwash water inlet pipe; the device can realize that rainwater filters downwards and filter material backflushes upwards, but because the backflushing is only reverse rivers, suspended solid still stays in a large amount on filter material upper portion after the backflushing, and the filtration that follows is hindered, and this kind of jam can be more and more obvious over time, influences the work efficiency of device.

Disclosure of Invention

The utility model aims to provide a rapid filtering device for light polluted water, which aims to solve the problems that a rainwater filtering device is easy to block and backwashing is to be improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the rapid filtering device for the light polluted water comprises a filtering tank and a backwashing system, wherein the filtering tank comprises a water inlet area and a filtering area, the water inlet area and the filtering area are respectively positioned at two sides of the filtering tank, a sundry retention area is arranged between the lower end of the filtering area and the bottom of the filtering area and is communicated with the water inlet area, the water inlet area and the filtering area are all separated by a partition plate, a plurality of water through holes are formed in the partition plate at the lower end of the filtering area, a filtering material is filled in the filtering area, a porous cover plate is arranged at the upper end of the filtering area, a filtering tank blow-down pipe is arranged at the lower end of the filtering tank, a water inlet system which is directly communicated with the water inlet area is arranged at one side of the filtering tank positioned above the filtering area and a filtering tank water outlet pipe is arranged at one side of the filtering tank positioned above the filtering area;

the backwashing system comprises a reservoir, a water outlet pipe of the filter tank is communicated with the reservoir, a submersible pump is arranged in the reservoir and is connected with a backwashing water inlet pipe, a water outlet of the water outlet pipe is connected to the upper part of the filtering area, a water outlet system is arranged on one side of the upper part of the reservoir and is used for discharging filtered water, and an aeration system is fixedly arranged at the bottom of the filter tank, which is positioned under the filtering area.

Preferably, the water inlet system comprises a water inlet main pipe, a water inlet pump and a sewage tank, wherein the water inlet pump is arranged in a water inlet main pipe, and two ends of the water inlet main pipe are respectively connected with the sewage tank and the water inlet area.

Preferably, the water outlet system comprises a reservoir outlet pipe and a clean water tank.

Preferably, the lower end of the reservoir is provided with a reservoir blow-down pipe.

Preferably, the filter blow-down pipe and the reservoir blow-down pipe are respectively provided with a valve element.

Preferably, the pore diameters of the porous cover plate and the water passing holes are smaller than the particle size of the filter material.

Preferably, the filter material is a light suspended filter material with density less than that of water and has elasticity.

Preferably, the upper part of the water inlet area is provided with a liquid level meter, and the metering height of the liquid level meter is higher than the height of the joint of the water outlet pipe of the filter tank and the filtering area.

Compared with the prior art, the utility model has the beneficial effects that:

1. this to quick filter equipment of light contaminated water only is equipped with the filter material at filtering part, can filter light contaminated water fast, still is equipped with backwash system and can utilize the sewage after filtering to backwash, reduces the use of clean water.

2. This quick filter equipment to light contaminated water adopts the filtration mode of upward flow formula, compares down flow formula filter equipment and is difficult for blockking up, adopts down to wash when the backwash, and the cooperation gravity helps more easily gets rid of suspended solid, and can not stay in the filter material upper end.

3. This rapid filter equipment to light pollution water can adopt light suspension filter material, utilizes its density to be less than water and elastic deformation compression's characteristic, after the liquid level risees, and the filter material becomes more closely knit, gets rid of the suspended pollutant in the light pollution water, has guaranteed efficient removal effect.

4. According to the rapid filtering device for the light polluted water, microporous bubbles are introduced in the backwashing process by matching with the aeration system, and the backwashing efficiency of the filter material is further improved by collision of the bubbles and the filter material.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1. a sewage pool; 2. a clean water tank; 3. a water inlet main pipe; 4. a water inlet pump; 5. a water inlet area; 6. a filtration zone; 7. a porous cover plate; 8. a filter material; 9. an aeration system; 10. a water outlet pipe of the filter tank; 11. a reservoir; 12. backwashing the water inlet pipe; 13. submersible pump; 14. a reservoir blow-down pipe; 15. a filter tank is emptied; 16. and a water outlet pipe of the water reservoir.

Detailed Description

As shown in figure 1, the rapid filtering device for light polluted water comprises a filtering tank and a backwashing system, wherein the filtering tank comprises a water inlet area 5 and a filtering area 6, the water inlet area 5 and the filtering area 6 are respectively positioned at two sides of the filtering tank, a sundry retention area is arranged between the lower end of the filtering area 6 and the bottom of the filtering tank and communicated with the water inlet area 5, the water inlet area 5 and the filtering area 6 are all separated by a partition plate, a plurality of water passing holes are formed in the partition plate at the lower end of the filtering area 6, a filtering material 8 is filled in the filtering area 6, a porous cover plate 7 is arranged at the upper end cover of the filtering tank, a filtering tank blow-down pipe 15 is arranged at the lower end of the filtering tank, a water inlet system which is directly communicated with the water inlet area 5 is arranged at one side of the filtering tank 5 and a filtering tank water outlet pipe 10 is arranged at one side of the filtering tank which is positioned above the filtering area 6;

the backwash system includes cistern 11, and filtering pond outlet pipe 10 communicates to cistern 11, is equipped with immersible pump 13 in it and is connected with backwash inlet tube 12, and its delivery port is connected to filtering district 6 upper portion, and upper portion one side of cistern 11 is provided with out water system and is used for out filtered water, and the filtering pond bottom is located filtering district 6 department fixed mounting has aeration system 9 under, and aeration system 9 is the common equipment in market, can constitute by swirl air pump and many microporous aeration pipeline, also can adopt other forms.

The water inlet system can be referred to as follows: the sewage treatment device comprises a main water inlet pipe 3, a water inlet pump 4 and a sewage tank 1, wherein the water inlet pump 4 is arranged in a pipeline of the main water inlet pipe 3, and two ends of the main water inlet pipe 3 are respectively connected with the sewage tank 1 and a water inlet area 5.

The water outlet system can be referred to as follows: comprising a reservoir outlet pipe 16 and a clean water tank 2.

The lower end of the reservoir 11 may also be provided with a reservoir blow-down pipe 14 for periodic cleaning.

The filter blow-down pipe 15 and the reservoir blow-down pipe 14 can be respectively provided with a valve for controlling a switch or opening degree, and can also be connected with equipment such as a water pump and the like.

In order to keep the filter material 8 from running out, the pore diameters of the porous cover plate 7 and the water passing holes should be smaller than the particle diameter of the filter material 8.

In a preferred embodiment, the filter material 8 is a light suspended filter material with a density less than that of water and elasticity, and can form a relatively compact filter layer under the action of buoyancy, specifically, the filter material enters the filter area along with the rise of the water level, the filter material rises continuously along with the sewage until the filter material rises to the cover plate, the filter material is blocked from rising continuously, the filter material is compacted further along with the rise of the liquid level in the filter area, and a better filtering effect can be achieved.

In addition, a liquid level meter can be arranged at the upper part of the water inlet area 5, the measurement height of the liquid level meter is higher than the height of the joint of the water outlet pipe 10 of the filter tank and the filtering area 6, and when the liquid level exceeds a certain height, the liquid level meter can be used for judging whether backwashing is needed.

After entering a water inlet area from a water inlet system, sewage flows to the bottom of a filter tank, the liquid level gradually rises, after contacting a filtering area, the sewage is filtered upwards through a filter material, water begins to be discharged to a reservoir when the liquid level reaches a water outlet pipe of the filter tank, and filtered water begins to be discharged when the water level of the reservoir exceeds the water outlet pipe of the reservoir; after filtering for a period of time, the filter material starts to be blocked, the filtering speed is slow, the liquid level can be accelerated to rise, when the liquid level is high to a set backwashing height, water inflow can be stopped to start backwashing, and the specific flow can be referred to as follows: firstly, opening a filter blow-down pipe to blow down the filter, then closing the filter blow-down pipe, opening a submersible pump to enter a filtering area for backwashing filter materials, when the water level reaches a set enhanced backwashing height (at least exceeds the lower part of the filter materials), opening an aeration system, accelerating the falling of pollutants on the surface of the filter materials by utilizing generated tiny bubbles, contributing to improving the backwashing efficiency, closing the aeration system and the submersible pump after backwashing for a period of time, opening the filter blow-down pipe for sewage discharge, closing the filter blow-down pipe after sewage discharge is finished, and continuing to use, wherein backwashing can be performed for a plurality of times after sewage discharge is finished; when the reservoir is in need of pollution discharge, the reservoir blow-down pipe is only required to be opened.

According to the above-mentioned reference operation process, it is not difficult to see that the structure of the rapid filtering device for light polluted water of the present utility model is not limited to the example shown in fig. 1, for example, the overall height of the filtering tank can be increased, and the height of the filtering tank water outlet pipe 10 and the filtering area 6 can be kept unchanged, so that a higher backwash liquid level can be set up, and in addition, the height of the water inlet system can be increased to the top end of the filtering tank; the bottom of the filter tank and the bottom of the water storage tank can be arranged in a funnel shape according to the pollution discharge requirement and referring to the prior art commonly used for pollution discharge; the position of the backwash water inlet pipe 12 connected to the filtering area 6 can be adjusted, and the backwash purpose can be achieved by matching with the aeration system 9 as long as the position is higher than the bottom of the filtering material.

The above is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be covered by the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims

1. A rapid filtration device for light contaminated water, characterized in that: the filter comprises a filter tank and a backwashing system, wherein the filter tank comprises a water inlet region (5) and a filter region (6), the water inlet region and the filter region are respectively positioned at two sides of the filter tank, a sundry retention region is arranged between the lower end of the filter region (6) and the bottom of the filter tank and is communicated with the water inlet region (5), the water inlet region (5) and the filter region (6) are all separated by a partition plate, a plurality of water through holes are formed in the partition plate at the lower end of the filter region (6), a filter material (8) is filled in the filter region (6), a porous cover plate (7) is arranged at the upper end cover of the filter material, a filter tank blow-down pipe (15) is arranged at the lower end of the filter tank, a water inlet system which is directly communicated with the water inlet region (5) is arranged at one side of the filter tank, and a water outlet pipe (10) is arranged at one side of the filter tank which is positioned above the filter region (6);

the backwashing system comprises a reservoir (11), a filter tank water outlet pipe (10) is communicated to the reservoir (11), a submersible pump (13) is arranged in the reservoir and is connected with a backwashing water inlet pipe (12), a water outlet of the water outlet pipe is connected to the upper portion of the filtering area (6), a water outlet system is arranged on one side of the upper portion of the reservoir (11) and is used for discharging filtered water, and an aeration system (9) is fixedly arranged at the bottom of the filter tank, which is located under the filtering area (6).

2. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the water inlet system comprises a water inlet main pipe (3), a water inlet pump (4) and a sewage tank (1), wherein the water inlet pump (4) is arranged in a pipeline of the water inlet main pipe (3), and two ends of the water inlet main pipe (3) are respectively connected with the sewage tank (1) and the water inlet area (5).

3. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the water outlet system comprises a reservoir water outlet pipe (16) and a clean water tank (2).

4. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the lower end of the reservoir (11) is provided with a reservoir blow-down pipe (14).

5. A rapid filtration device for lightly contaminated water according to claim 4, wherein: the filter tank blow-down pipe (15) and the reservoir blow-down pipe (14) are respectively provided with a valve element.

6. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the pore diameters of the porous cover plate (7) and the water passing holes are smaller than the particle diameter of the filter material (8).

7. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the filter material (8) is a light suspension filter material with the density less than that of water and has elasticity.

8. A rapid filtration device for lightly contaminated water according to claim 1, wherein: the upper part of the water inlet area (5) is provided with a liquid level meter, and the metering height of the liquid level meter is higher than the height of the joint of the water outlet pipe (10) of the filter tank and the filtering area (6).