CN221831749U - A counter-flow media filter with a central cleaning mechanism - Google Patents

Abstract

The utility model discloses a countercurrent medium filter with a middle cleaning mechanism, belonging to the technical field of medium filters, comprising a filter tank body, a first three-way pipe connected to the bottom of the filter tank body, an inlet valve installed at one end of the first three-way pipe, a backwash outlet valve installed at the other end of the first three-way pipe, a second three-way pipe connected to the top of the filter tank body, an outlet valve installed at one end of the second three-way pipe, and a backwash inlet valve installed at the other end of the second three-way pipe; the problem that the existing medium filter cannot meet the filtering requirements from low to high precision when in use, resulting in poor filtering effect; the utility model adopts the countercurrent filtering principle, which can meet the filtering requirements from low to high precision, the water flows countercurrently, and the filtering precision increases successively, and the middle water distribution backwashing is adopted to improve the backwashing effect of fine filter material, so that the pollution holding capacity of fine filter material and coarse filter material are in the best state, the backwashing cycle can be extended, and the filtering effect is improved.

Description

A counter-flow media filter with a central cleaning mechanism

Technical Field

The utility model relates to the technical field of medium filters, in particular to a counter-current medium filter with a middle cleaning mechanism.

Background Art

A media filter is a high-efficiency filtering device that uses filter media to remove various suspended matter, microorganisms, and other fine particles in water, ultimately achieving the effect of reducing water turbidity and purifying water quality; commonly used filter materials include quartz sand, activated carbon, anthracite, manganese sand, etc.

At the beginning of filtration, the water to be filtered reaches the medium layer through the water inlet. At this time, most of the pollutants are trapped on the upper surface of the medium, and a small amount of fine dirt and other floating organic matter are trapped inside the medium layer, so that the system water meets the requirements, ensuring that the production system is not disturbed by pollutants and can work well. When the impurities and various suspended solids in the water reach a certain amount, the filtration system can detect the inlet and outlet pressure difference in real time through the pressure difference control device. When the pressure difference reaches the set value, the electric control box will send a signal to the three-way hydraulic control valve in the control system. The three-way hydraulic control valve will automatically control the three-way valve of its corresponding filter unit through the water channel, allowing it to close the inlet channel and open the sewage channel at the same time. At this time, due to the low pressure in the sewage channel, the water of other filter units will enter from the water outlet of the filter unit under the action of water pressure, and continue to flush the medium layer of the filter unit, thereby achieving the effect of cleaning the medium. The flushed sewage enters the sewage pipe from the sewage outlet of the filter unit under the action of water pressure, completing a sewage discharge process.

When used, existing media filters filter from top to bottom, first through fine sand and then through coarse sand, which cannot meet the filtering requirements from low to high precision, resulting in poor filtering effect.

Utility Model Content

The purpose of the utility model is to provide a countercurrent medium filter with a middle cleaning mechanism. The countercurrent filtration principle is adopted to meet the filtering requirements from low to high precision. The water flows upstream, and the filtering precision increases successively. The middle water distribution backwashing is adopted to improve the backwashing effect of the fine filter material, so that the pollution holding capacity of the fine filter material and the coarse filter material are in the best state, the backwashing cycle can be extended, the filtering effect is improved, and the problems in the prior art can be solved.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A countercurrent media filter with a central cleaning mechanism comprises a filter tank body, the filter tank body is installed on a base, a first three-way pipe is connected to the bottom of the filter tank body, a water inlet valve is installed at one end of the first three-way pipe, and a backwash water outlet valve is installed at the other end of the first three-way pipe, a second three-way pipe is connected to the top of the filter tank body, a water outlet valve is installed at one end of the second three-way pipe, and a backwash water inlet valve is installed at the other end of the second three-way pipe, the second three-way pipe is connected to the central water inlet pipe, a central backwash water distribution mechanism is arranged on the central water inlet pipe, and the central backwash water distribution mechanism is located on the inner side of the filter tank body.

Preferably, the second three-way pipe is provided with an exhaust valve and a pressure gauge.

Preferably, a middle backwash water inlet valve is installed on the middle water inlet pipe.

Preferably, fine filter material and coarse filter material are arranged on the inner side of the filter tank, and the fine filter material is located above the coarse filter material.

Preferably, a water collector and a water distributor are provided on the inner side of the filter tank, the water collector is located above the fine filter material, and the water distributor is located at the lower end of the coarse filter material.

Preferably, the middle backwash water distribution mechanism is located on the inner side of the fine filter material.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The utility model adopts the countercurrent filtration principle and can meet the filtration requirements from low to high precision. In the normal filtration process, the water flows upstream and the filtration precision increases successively. The load of impurities on each layer of filter material will be more reasonable. It will not be like the downstream filtration, where the fine filter material is used to load the high concentration of impurities from the beginning. The middle backwash water distribution mechanism is added to achieve the purpose of middle water distribution backwash, which can improve the backwash effect of the fine filter material. During the backwash process, the water flows from top to bottom, and part of the impurities will naturally settle and be discharged from the bottom, so that the pollution holding capacity of the fine filter material and the coarse filter material are in the best state. To a large extent, the backwash cycle can be extended, which will save more water and improve the filtration effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a counter-flow medium filter with a middle cleaning mechanism of the present invention;

FIG. 2 is a schematic structural diagram of the middle backwash water distribution mechanism of the present invention.

In the figure: 1. filter tank; 11. first three-way pipe; 111. water inlet valve; 112. backwash outlet valve; 12. second three-way pipe; 121. outlet valve; 122. backwash inlet valve; 123. exhaust valve; 124. pressure gauge; 13. middle water inlet pipe; 131. middle backwash water distribution mechanism; 132. middle backwash inlet valve; 14. fine filter material; 15. coarse filter material; 16. water collector; 17. water distributor; 2. base.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

In order to solve the technical problem that the existing media filter is used to filter from top to bottom, first through fine sand and then through coarse sand, which cannot meet the filtering requirements from low to high precision, resulting in poor filtering effect, please refer to Figures 1-2, this embodiment provides the following technical solutions:

A countercurrent media filter with a central cleaning mechanism comprises a filter tank body 1, which is mounted on a base 2. A first three-way pipe 11 is connected to the bottom of the filter tank body 1, an inlet valve 111 is mounted at one end of the first three-way pipe 11, and a backwash outlet valve 112 is mounted at the other end of the first three-way pipe 11. A second three-way pipe 12 is connected to the top of the filter tank body 1, an outlet valve 121 is mounted at one end of the second three-way pipe 12, and a backwash inlet valve 122 is mounted at the other end of the second three-way pipe 12. The second three-way pipe 12 is connected to a central water inlet pipe 13, a central backwash water distribution mechanism 131 is arranged on the central water inlet pipe 13, and the central backwash water distribution mechanism 131 is located on the inner side of the filter tank body 1.

In this embodiment, an exhaust valve 123 and a pressure gauge 124 are provided on the second three-way pipe 12 .

In this embodiment, a middle backwash water inlet valve 132 is installed on the middle water inlet pipe 13 .

In this embodiment, a fine filter material 14 and a coarse filter material 15 are arranged inside the filter tank 1 , and the fine filter material 14 is located above the coarse filter material 15 .

In this embodiment, a water collector 16 and a water distributor 17 are provided inside the filter tank 1 . The water collector 16 is located above the fine filter material 14 , and the water distributor 17 is located at the lower end of the coarse filter material 15 .

In this embodiment, the middle backwash water distribution mechanism 131 is located inside the fine filter material 14 .

Working principle: Under normal filtering state, the water inlet valve 111 and the water outlet valve 121 are both opened, and the water to be filtered enters the filter tank 1 through the water inlet of the first three-way pipe 11, and the water to be filtered flows upstream, is filtered through the coarse filter material 15 and the fine filter material 14 in turn, and is discharged through the water outlet of the second three-way pipe 12.

In the backwash state, the backwash inlet valve 122, the middle backwash inlet valve 132 and the backwash outlet valve 112 are all opened, and the backwash water enters through the backwash inlet of the second three-way pipe 12, enters the filter tank body 1 through the middle water inlet pipe 13, and the trapped impurities are flushed through the middle backwash water distribution mechanism 131, and finally discharged through the backwash outlet of the first three-way pipe 11, completing a natural flow backwash process.

The countercurrent filtration principle is adopted to meet the filtration requirements from low to high precision. During the normal filtration process, the water flows upstream, and the filtration precision increases successively. The load of impurities on each layer of filter material will be more reasonable. It will not be like downstream filtration, where the fine filter material 14 is used to load high-concentration impurities from the beginning. The middle backwash water distribution mechanism 131 is added to achieve the purpose of intermediate water distribution backwash, which can improve the backwash effect of the fine filter material 14. During the backwash process, the water flows from top to bottom, and part of the impurities will naturally settle and be discharged from the bottom, so that the fine filter material 14 and the coarse filter material 15 are in the best state of pollution holding capacity. To a large extent, the backwash cycle can be extended, which will save more water and improve the filtration effect.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A countercurrent media filter with a middle cleaning mechanism, comprising a filter tank (1), characterized in that: the filter tank (1) is mounted on a base (2), a first three-way pipe (11) is connected to the bottom of the filter tank (1), a water inlet valve (111) is mounted on one end of the first three-way pipe (11), a backwash water outlet valve (112) is mounted on the other end of the first three-way pipe (11), a second three-way pipe (12) is connected to the top of the filter tank (1), a water outlet valve (121) is mounted on one end of the second three-way pipe (12), a backwash water inlet valve (122) is mounted on the other end of the second three-way pipe (12), the second three-way pipe (12) is connected to a middle water inlet pipe (13), a middle backwash water distribution mechanism (131) is arranged on the middle water inlet pipe (13), and the middle backwash water distribution mechanism (131) is located on the inner side of the filter tank (1). 2. A counter-flow media filter with a middle cleaning mechanism according to claim 1, characterized in that an exhaust valve (123) and a pressure gauge (124) are provided on the second three-way pipe (12). 3. A counter-flow media filter with a middle cleaning mechanism according to claim 1, characterized in that a middle backwash water inlet valve (132) is installed on the middle water inlet pipe (13). 4. A countercurrent media filter with a middle cleaning mechanism according to claim 1, characterized in that: fine filter material (14) and coarse filter material (15) are arranged on the inner side of the filter tank (1), and the fine filter material (14) is located above the coarse filter material (15). 5. A countercurrent media filter with a middle cleaning mechanism according to claim 4, characterized in that a water collector (16) and a water distributor (17) are provided on the inner side of the filter tank (1), the water collector (16) is located above the fine filter material (14), and the water distributor (17) is located at the lower end of the coarse filter material (15). 6. A counter-flow media filter with a middle cleaning mechanism according to claim 5, characterized in that the middle backwash water distribution mechanism (131) is located on the inner side of the fine filter material (14).