CN214232994U

CN214232994U - Back flush filter

Info

Publication number: CN214232994U
Application number: CN202120041727.XU
Authority: CN
Inventors: 王允飞
Original assignee: Nantong Hongda Petrochemical Equipment Manufacturing Co ltd
Current assignee: Nantong Hongda Petrochemical Equipment Manufacturing Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-09-21
Anticipated expiration: 2031-01-07

Abstract

The utility model discloses a backwashing filter, which comprises a filter tank, wherein a feeding pipeline and a positive blowing pipeline are arranged on the filter tank, and the other end of the positive blowing pipeline is connected with an air source; a plurality of filter elements are arranged inside the filter tank, the output ends of the filter elements are all communicated with a filtrate pipe, and the filtrate pipe outputs filtrate to an external container through an output pipeline; the output pipeline is connected with a back-blowing pipeline, and the other end of the back-blowing pipeline is also connected with an air source. The forward flushing and the directional flushing are combined, so that the cleaning effect can be effectively improved, the flushing is more thorough, the whole backwashing operation is simple and convenient to operate, only a plurality of control valves are required to be opened and closed, and the working efficiency is high; meanwhile, the problems of incomplete cleaning and incomplete cleaning existing in a common backwashing structure can be effectively solved by grouping back flushing.

Description

Back flush filter

Technical Field

The utility model belongs to the technical field of filtration equipment, concretely relates to filter with back flush function.

Background

The filter is a common device in the chemical field, the traditional mechanical filter is characterized in that a medium finishes filtering through a filter screen, in the process, impurities are deposited at the bottom of the filter screen or attached to the wall of the filter screen, the impurities slightly larger than the filter holes are embedded in the filter holes, and when a discharge valve (or a lower cover) is opened, the medium can drain the impurities deposited at the bottom of the filter screen but is difficult to flush the attached or embedded impurities. With the increase of attachments and inserts on the filter screen, the flow area of the filter screen can be reduced, the flow resistance of the filter is increased until the filter screen is blocked, and secondary pollution is generated, at the moment, the filter screen must be replaced, so that the use cost is increased. In order to solve the problem, the most original method is to remove the filter element and manually clean the filter screen, but the method has large workload and difficult guarantee of cleaning quality. There are also improvements to the filter element which enlarge the mesh of the filter screen, but this results in a reduction of the filtration accuracy.

The Chinese patent 90201648.2 provides a filter using a self-cleaning filter element, and a back washing pump is used for realizing medium back washing. The automatic backwashing filter provided by the Chinese patent 02149389.8 realizes the filtering and backwashing functions by utilizing the filtering valve plate and the backwashing valve plate, the filtering valve plate and the backwashing valve plate are closed or opened according to the requirements, power needs to be configured in the washing process, the water flow direction is unchanged during filtering and washing, impurities embedded in the filtering holes are not easy to take away, and the backwashing effect is poor.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a back flush filter, it has superior back flush performance, and does not have liquid to remain in the back flush back filter, more does benefit to the maintenance of filter and maintains.

In order to achieve the technical effects, the utility model discloses a following technical scheme:

a backflush filter, comprising:

the filter tank is provided with a feeding pipeline and a positive blowing pipeline, and the other end of the positive blowing pipeline is connected with an air source;

the output ends of the filter elements are communicated with filtrate pipes, and the filtrate pipes output filtrate to an external container through an output pipeline;

the back flushing pipeline is connected with the output pipeline, and the other end of the back flushing pipeline is also connected with the air source;

and control valves are arranged at the outlet of the filtrate pipe, on the feeding pipeline, on the forward blowing pipeline and on the reverse blowing pipeline.

In some embodiments, a partition plate is arranged at the bottom of the filter tank, a filtrate cavity is arranged below the partition plate, the output end of the filter element is communicated with the filtrate cavity through a through hole in the partition plate, the filtrate cavity is also connected with the output pipeline, and a control valve is arranged at the outlet of the filtrate cavity.

In some embodiments, the filter tank is further provided with a slag discharge pipe, and the slag discharge pipe is provided with a control valve.

In some embodiments, the gas source is an air compressor or an air reservoir.

In some embodiments, a sampling branch is also connected to the output conduit.

In some embodiments, the output conduit is further connected to a detergent input conduit.

In some embodiments, a regeneration liquid input pipeline is connected to the top of the filtering tank.

The utility model has the advantages that:

1. the backwashing effect is excellent, the flushing is more thorough, the whole backwashing operation is simple and convenient to operate, and the working efficiency is high;

2. after back washing, no liquid residue exists in the filter, which is beneficial to the maintenance of the device.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a filter element portion according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of the present invention;

in the figure:

the device comprises a filter tank 1, a feed pipeline 2, an output pipeline 3, a positive blowing pipeline 4, a back blowing pipeline 5, an air source 6, a filter element 7, a filtrate pipe 8, a control valve 9, a partition plate 10, a through hole 11, a filtrate cavity 12, a residue discharge pipe 13, a sampling branch pipe 14, a detergent input pipeline 15 and a regeneration liquid input pipe 16.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a backflush filter includes: the device comprises a filter tank 1, wherein a feeding pipeline 2 and a positive blowing pipeline 4 are arranged on the filter tank 1, and the other end of the positive blowing pipeline 4 is connected with an air source 6; a plurality of filter elements 7 are arranged in the filter tank 1, the output ends of the filter elements 7 are communicated with a filtrate pipe 8, and the filtrate pipe 8 outputs filtrate to an external container through an output pipeline 3; the output pipeline 3 is connected with a back flushing pipeline 5, and the other end of the back flushing pipeline 5 is also connected with an air source 6; the outlet of the filtrate pipe 8, the feeding pipeline 2, the positive blowing pipeline 4 and the back blowing pipeline 5 are all provided with control valves 9.

When the backwashing filter works normally, the control valve 9 on the positive-blowing pipeline 4 and the reverse-blowing pipeline 5 is closed, a medium to be filtered is input into the filtering tank 1 through the feeding pipeline 2, the medium to be filtered enters the filter element 7 through the filter screen, and when the medium passes through the filter screen, fine particle impurities or suspended matters are intercepted by the filter screen and are attached to or embedded into the filter screen, so that the medium is filtered, and the filtered medium enters the output pipeline 3 along the filtrate pipe 8 and is finally output to an external container.

When the filter element 7 is positively washed, clear water is input from the feeding pipeline 2, the control valve 9 on the positive blowing pipeline 4 is opened, the filter tank 1 is inflated to generate gas-liquid mixed flow, the gas-liquid mixed flow with pressure washes the filter screen of the filter element 7, impurities attached to or embedded on the filter screen can be washed off, and the cleaning operation of the filter element 7 is completed.

Sometimes, the stain adhesion degree is high, and the reverse washing operation can be carried out only by the fact that the forward washing is difficult to completely remove. When the filter tank is washed reversely, clear water is stopped to be introduced into the filter tank 1, the control valve 9 of the forward blowing pipeline 4 is closed, the control valve on the reverse blowing pipeline 5 is opened, air is introduced into the filter tank 1 through the reverse blowing pipeline 5, the gas-liquid mixed flow penetrates through the filter element 7 from the inside to the outside, the moving direction of the gas-liquid mixed flow is opposite to that of the gas-liquid mixed flow when the filter tank is washed forwardly, and attached impurities which are difficult to clean when the filter tank is washed forwardly can be easily washed away by the reverse gas-liquid mixed flow. The gas-liquid mixed flow is discharged from the feeding pipeline 2, because the gas is introduced, larger air pressure is generated, finally, the liquid can be discharged under pressure, and after the back flushing is finished, no liquid is left in the filter tank 1, so that the maintenance and the maintenance after the filter is stopped are facilitated. The forward flushing and the directional flushing are combined, the cleaning effect can be effectively improved, the flushing is more thorough, the whole backwashing operation is simple and convenient to operate, only a plurality of control valves 9 need to be opened and closed, and the working efficiency is high.

As shown in FIG. 2, a plurality of filtrate pipes 8 can be arranged in the filter tank 1, each filtrate pipe 8 is connected with 3-5 filter elements 7, and a single filtrate pipe 8 and a plurality of filter elements 7 connected with the single filtrate pipe form a filter group. Set up a plurality of filtration groups in the filter tank 1, filter core 7 arranges densely, so can weaken the radiation of impurity and gather the effect, reduces the emergence that the big piece impurity adheres to the phenomenon on the filter screen, indirectly promotes the clean effect of just, back flush.

As shown in fig. 3, a filtrate chamber 12 may be additionally provided in the filtration tank 1, a partition plate 10 is provided at the bottom of the filtration tank 1, the filtrate chamber 12 is provided below the partition plate 10, a part of the filter element 7 is disposed downward, an output end of the filter element is communicated with the filtrate chamber 12 through a through hole 11 in the partition plate 10, the filtrate chamber 12 is also connected with the output pipeline 3, and a control valve 9 is provided at an outlet of the filtrate chamber 12. The operation processes of filtering, forward flushing and backward flushing in this embodiment are the same as those described above, but the filter element 7 occupies a larger space in the filter tank 1 in this embodiment, the amount of medium that can be filtered per unit time is larger, and the filtering efficiency is higher.

The filtering tank 1 is also provided with a slag discharge pipe 13, and the slag discharge pipe 13 is provided with a control valve 9. The deslagging pipe 13 is matched with the backwashing operation for use, when the backwashing is carried out, the control valve 9 at the deslagging pipe 13 is opened, and after impurities attached to and embedded in the filter screen are washed away originally, the impurities can be discharged from the deslagging pipe 13 along with gas-liquid mixed flow, so that the impurity blockage of the feeding pipeline 3 is avoided, and the practicability of the whole filter is improved.

The air source 6 is an air compressor or an air storage tank, and during actual use, the proper air source 6 can be selected according to the size of the filter tank 1. The filtering area is less than 5m²When in use, an air compressor can be directly used for inflating and backflushing the filter tank 1; the filtering area is more than 5m²When in use, the air storage tank can be selected.

The output pipeline 3 is also connected with a sampling branch pipe 14, and in the filtering operation process, the control valve 9 on the sampling branch pipe 14 is opened, so that a filtrate sample can be conveniently taken, and a user can conveniently analyze the sample and monitor the filtering effect.

The output pipeline 3 is also connected with a detergent input pipeline 15, and detergent can be introduced into the filter tank 1 through the detergent input pipeline 15 during the back flushing operation, so that the cleaning effect of the back flushing is further improved.

The top of the filter tank 1 is also connected with a regeneration liquid input pipeline 16. The filter element 7 is worn after being used for a period of time, can be regenerated by adopting a chemical method, and can add the regeneration liquid into the filter tank 1 through the regeneration liquid input pipe 16 during forward blowing and flushing, so that the loss of the filter element 7 is compensated, the service life of the filter element 7 is prolonged, and the use cost is further reduced.

It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the invention. Which all fall within the protection scope of the utility model. The protection scheme of the utility model is based on the appended claims.

Claims

1. A backflush filter, comprising:

the device comprises a filter tank (1), wherein a feeding pipeline (2) and a forward blowing pipeline (4) are arranged on the filter tank (1), and the other end of the forward blowing pipeline (4) is connected with an air source (6);

the filter elements (7) are arranged in the filter tank (1), the output ends of the filter elements are communicated with a filtrate pipe (8), and the filtrate pipe (8) outputs filtrate to an external container through an output pipeline (3);

the back flushing pipeline (5) is connected with the output pipeline (3), and the other end of the back flushing pipeline is also connected with the air source (6);

and control valves (9) are arranged at the outlet of the filtrate pipe (8), on the feeding pipeline (2), on the forward blowing pipeline (4) and on the back blowing pipeline (5).

2. The backwashing filter of claim 1, wherein a partition plate (10) is arranged at the bottom of the filter tank (1), a filtrate chamber (12) is arranged below the partition plate (10), the output end of the filter element (7) is communicated with the filtrate chamber (12) through a through hole (11) in the partition plate (10), the filtrate chamber (12) is also connected with the output pipeline (3), and a control valve (9) is arranged at the outlet of the filtrate chamber (12).

3. The backwashing filter of claim 1, wherein a slag discharge pipe (13) is further arranged on the filter tank (1), and a control valve (9) is arranged on the slag discharge pipe (13).

4. The backflush filter of claim 1, wherein the gas source (6) is an air compressor or an air tank.

5. The backflush filter according to claim 1, characterized in that a sampling branch (14) is also connected to the outlet line (3).

6. The backflush filter according to claim 1, characterized in that a detergent inlet line (15) is also connected to the outlet line (3).

7. The backflushing filter according to claim 1, characterized in that a regeneration liquid inlet pipe (16) is also connected to the top of the filter tank (1).