CN110759400A - Sewage filter, filter material collector and backwashing method - Google Patents

Sewage filter, filter material collector and backwashing method Download PDF

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Publication number
CN110759400A
CN110759400A CN201911211626.6A CN201911211626A CN110759400A CN 110759400 A CN110759400 A CN 110759400A CN 201911211626 A CN201911211626 A CN 201911211626A CN 110759400 A CN110759400 A CN 110759400A
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China
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gas
backflushing
filter
backwash
pipe
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CN201911211626.6A
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Chinese (zh)
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胡小弟
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Individual
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Individual
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Priority to CN201911211626.6A priority Critical patent/CN110759400A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations

Abstract

The invention provides a sewage filter, a filter material collector and a backwashing method, which relate to the technical field of backwashing and comprise the following steps: the filter comprises a backwashing component and a plurality of first filtering components arranged in parallel; because a plurality of first filtering assemblies arranged in parallel are communicated with the backflushing gas main pipe and the backflushing water main pipe, the first filtering assemblies are backflushed, the exhaust valve is arranged on the backflushing gas main pipe and used for exhausting redundant gas in the pipeline, the exhaust valve and the backflushing gas main valve are always in opposite opening and closing states, backflushing gas is prevented from leaking from the exhaust valve during backflushing, the technical problem that gas remains in a pipeline after the backflushing of a sewage filter in the prior art is finished, compressed gas easily penetrates through the valve and enters the sewage filter under normal operation, and the filtering precision is affected is solved, the technical effect that the residual compressed gas in the pipeline enters the sewage filter under the normal operation state after the backflushing is avoided, and the hidden danger of precision reduction is eliminated is achieved.

Description

Sewage filter, filter material collector and backwashing method
Technical Field
The invention relates to the technical field of backwashing, in particular to a sewage filter, a filter material collector and a backwashing method.
Background
Along with the improvement of the living standard of people, the production amount of domestic sewage is greatly increased, the increasing speed of the domestic sewage is far beyond the expectation of people, the domestic sewage pollutes the environment if being directly discharged, the loss is brought to people, and the sewage is filtered by using a sewage filter.
The sewage filter is provided with a filter material, the filter material fully filters sewage, and in order to maintain the filtering effect of the filter material, the filter material needs to be backwashed after a period of sewage treatment, so that the filter material has an efficient filtering effect again, and usually liquid and gas are used for backwashing the filter material.
However, after the back washing is finished, gas remains in the pipeline, and compressed gas easily passes through the valve and enters the sewage filter under normal operation, so that the filtering precision is affected.
Disclosure of Invention
The invention aims to provide a sewage filter, a filter material collector and a backwashing method, which solve the technical problem that compressed gas easily passes through a valve and enters the sewage filter under normal operation to influence the filtering precision in the prior art that gas remains in a pipeline after backwashing of the sewage filter is finished.
In a first aspect, the present invention provides a sewage filter comprising: the filter comprises a backwashing component and a plurality of first filtering components arranged in parallel;
the backwashing component comprises a backwashing gas main pipe and a backwashing water main pipe;
the plurality of first filter assemblies are all communicated with the backflushing gas main pipe, and the backflushing gas main pipe is configured to convey backflushing gas to the plurality of first filter assemblies;
a plurality of said first filter assemblies each in communication with said backwash water header, said backwash water header configured to enable delivery of backwash water to a plurality of said first filter assemblies;
the backflushing gas main pipe is sequentially provided with a backflushing gas main valve and an exhaust valve along the gas flowing direction, and the backflushing gas main valve and the exhaust valve are opposite in opening and closing state.
In an alternative embodiment, the backflushing gas main is communicated with the backflushing water main, and gas in the backflushing gas main can enter the backflushing water main to form a gas-liquid mixture and be conveyed to the first filter assemblies.
In an alternative embodiment, a backwash pump is provided on the backwash water header and is configured to increase the pressure of the gas-liquid mixture.
In an alternative embodiment, the backwash pump, the pressure gauge and the flow meter are sequentially arranged on the backwash water header pipe along the flow direction of the gas-liquid mixture.
In an alternative embodiment, each of the first filter assemblies is provided with a first backflushing gas branch pipe and a first backflushing water branch pipe;
each first backflushing gas branch pipe is communicated with the backflushing gas main pipe;
each first backwashing water branch pipe is communicated with the backwashing water main pipe, and the gas-liquid mixture in the backwashing water main pipe can enter the first filtering assembly through the first backwashing water branch pipe.
In an alternative embodiment, the backwash water main is provided with a feed valve for controlling the flow of backwash water to the backwash pump.
In an alternative embodiment, the sewage filter further comprises a plurality of second filter assemblies arranged in parallel;
each second filtering assembly is provided with a second backflushing gas branch pipe;
each second backflushing air branch pipe is communicated with the backflushing air main pipe.
In a second aspect, the present invention provides a filter media collector, comprising: a backwash assembly and a separator body;
the backwashing component comprises a backwashing gas main pipe and a backwashing water main pipe;
the separator body is in communication with the back flushing gas manifold, which is configured to deliver back flushing gas to the separator body;
the separator body is in communication with the backwash water header configured to enable delivery of backwash water to the separator body.
In an alternative embodiment, a third back flushing gas branch pipe and a third back flushing water branch pipe are arranged on the separator main body;
the third back-flushing gas branch pipe is communicated with the back-flushing gas main pipe, and the third back-flushing water branch pipe is communicated with the back-flushing water main pipe.
In an alternative embodiment, the filter media collector further comprises a collector body;
the collector main body is communicated with the separator main body and is used for intercepting filter materials in a solid-liquid mixture flowing out of the separator main body.
In a third aspect, the present invention provides a backwashing method, including the steps of:
opening an exhaust valve to exhaust redundant gas in the backflushing gas main pipe;
closing the exhaust valve, opening a back flushing gas main valve, and allowing back flushing gas to enter a back flushing water main pipe through the back flushing gas main pipe;
backwashing water enters a backwashing water main pipe to be mixed with gas to form a gas-liquid mixture, the gas-liquid mixture enters a first filter assembly through a first backwashing water branch pipe after being pressurized, and a filter material in the first filter assembly is backwashed to form backwashing sewage with the filter material;
the backflushing gas in the backflushing gas main pipe intermittently enters the first filtering assembly through the first backflushing gas branch pipe.
In an alternative embodiment, the method further comprises the following steps:
backwashing sewage with the filter material flows into the separator main body;
back washing water in the back washing water main pipe enters the separator main body through the third back washing water branch pipe, and trapped filter materials are cleaned;
the backflushing gas in the backflushing gas main pipe intermittently enters the separator main body through the third backflushing gas branch pipe;
the solid-liquid mixture in the separator body enters the collector body to trap the filter material in the solid-liquid mixture.
The invention provides a sewage filter, comprising: the filter comprises a backwashing component and a plurality of first filtering components arranged in parallel; the backwashing component comprises a backwashing gas main pipe and a backwashing water main pipe; the plurality of first filtering assemblies are communicated with a backflushing gas main pipe, and the backflushing gas main pipe is configured to be capable of conveying backflushing gas to the plurality of first filtering assemblies; the plurality of first filter assemblies are all communicated with a backwashing water main pipe, and the backwashing water main pipe is configured to be capable of conveying backwashing water to the plurality of first filter assemblies; the backflushing gas main pipe is sequentially provided with a backflushing gas main valve and an exhaust valve along the gas flowing direction, and the opening and closing states of the backflushing gas main valve and the exhaust valve are opposite. Because a plurality of first filtering assemblies arranged in parallel are communicated with the backflushing gas main pipe and the backflushing water main pipe, the first filtering assemblies are backflushed, the exhaust valve is arranged on the backflushing gas main pipe and used for exhausting redundant gas in the pipeline, the exhaust valve and the backflushing gas main valve are always in opposite opening and closing states, backflushing gas is prevented from leaking from the exhaust valve during backflushing, the technical problem that gas remains in a pipeline after the backflushing of a sewage filter in the prior art is finished, compressed gas easily penetrates through the valve and enters the sewage filter under normal operation, and the filtering precision is affected is solved, the technical effect that the residual compressed gas in the pipeline enters the sewage filter under the normal operation state after the backflushing is avoided, and the hidden danger of precision reduction is eliminated is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a sewage filter and a filter material collector provided in an embodiment of the present invention;
FIG. 2 is a schematic view of an overall structure of a sewage filter according to an embodiment of the present invention;
fig. 3 is a schematic overall structure diagram of a filter material collector provided in an embodiment of the present invention.
Icon: 100-back flushing gas main pipe; 110-main valve of recoil gas; 120-a vent valve; 200-backwash water main; 210-backwash pump; 220-pressure gauge; 230-a flow meter; 240-a water inlet valve; 300-a first filter assembly; 310-a first back flushing gas branch; 320-a first backwash water manifold; 400-a second filter assembly; 410-a second back flushing gas branch pipe; 500-a separator body; 510-a third back flushing gas branch pipe; 520-third backwash water manifold; 600-collector body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
As shown in fig. 1 and fig. 2, the sewage filter provided by the present embodiment includes: a backwashing assembly and a plurality of first filtering assemblies 300 arranged in parallel; the backwashing component comprises a backwashing gas main pipe 100 and a backwashing water main pipe 200; the plurality of first filter assemblies 300 are all communicated with the backflushing gas manifold 100, and the backflushing gas manifold 100 is configured to be capable of delivering backflushing gas to the plurality of first filter assemblies 300; the plurality of first filter assemblies 300 are all communicated with the backwash water main 200, and the backwash water main 200 is configured to be capable of delivering backwash water to the plurality of first filter assemblies 300; the backflushing gas main pipe 100 is sequentially provided with a backflushing gas main valve 110 and an exhaust valve 120 along the gas flowing direction, and the opening and closing states of the backflushing gas main valve 110 and the exhaust valve 120 are opposite.
Specifically, the first filter assemblies 300 are provided in plurality, the first filter assemblies 300 are arranged in parallel, each first filter assembly 300 operates independently, each first filter assembly 300 is not interfered with each other, each first filter assembly 300 is communicated with the backflushing air main 100 and the backflushing water main 200, and during backflushing, the backflushing air main 100 and the backflushing water main 200 convey backflushing fonts and backflushing water to the first filter assemblies 300 to backflush the first filter assemblies 300.
The backflushing gas main pipe 100 is provided with a backflushing gas main valve 110 and an exhaust valve 120, the backflushing gas main valve 110 and the exhaust valve 120 are sequentially arranged along the flowing direction of backflushing gas in the backflushing gas main pipe 100, the exhaust valve 120 is closed in the backflushing process, the backflushing gas main valve 110 is opened, the backflushing gas in the backflushing gas main pipe 100 enters the first filtering assembly 300, the exhaust valve 120 is intermittently opened when the first filtering assembly 300 normally operates, the backflushing gas remained in the backflushing gas main pipe 100 is exhausted through the exhaust valve 120, and the phenomenon that the residual backflushing gas enters the first filtering assembly 300 and influences the filtering precision of the first filtering assembly 300 is effectively avoided.
The sewage filter that this embodiment provided includes: a backwashing assembly and a plurality of first filtering assemblies 300 arranged in parallel; the backwashing component comprises a backwashing gas main pipe 100 and a backwashing water main pipe 200; the plurality of first filter assemblies 300 are all communicated with the backflushing gas manifold 100, and the backflushing gas manifold 100 is configured to be capable of delivering backflushing gas to the plurality of first filter assemblies 300; the plurality of first filter assemblies 300 are all communicated with the backwash water main 200, and the backwash water main 200 is configured to be capable of delivering backwash water to the plurality of first filter assemblies 300; the backflushing gas main pipe 100 is sequentially provided with a backflushing gas main valve 110 and an exhaust valve 120 along the gas flowing direction, and the opening and closing states of the backflushing gas main valve 110 and the exhaust valve 120 are opposite. Because a plurality of first filtering assemblies 300 arranged in parallel are communicated with the backflushing gas main pipe 100 and the backflushing water main pipe 200, the first filtering assemblies 300 are backflushed, the exhaust valve 120 is arranged on the backflushing gas main pipe 100, redundant gas in the pipeline is exhausted, the exhaust valve 120 and the backflushing gas main valve 110 are always in opposite opening and closing states, backflushing gas is prevented from leaking from the exhaust valve 120 during backflushing, the technical problem that gas remains in the pipeline after the backflushing of the sewage filter in the prior art is finished, compressed gas easily penetrates through the valve and enters the sewage filter under normal operation to affect the filtering precision is solved, the technical effect that the residual compressed gas in the pipeline enters the sewage filter under normal operation after backflushing is avoided, and the hidden danger of precision reduction is eliminated is achieved.
On the basis of the above embodiment, in an alternative implementation manner, the backwash water main 200 is communicated with the backwash air main 100 in the sewage filter provided by the embodiment, and the gas in the backwash air main 100 can enter the backwash water main 200 to form a gas-liquid mixture, and the gas-liquid mixture is conveyed to the plurality of first filter assemblies 300.
Specifically, along the flowing direction of the backflushing gas, the backflushing gas main pipe 100 is firstly communicated with the first filter assembly 300 and then communicated with the backflushing water main pipe 200, the backflushing gas in the backflushing gas main pipe 100 enters the backflushing water main pipe 200 and is mixed with the backflushing water in the backflushing water main pipe 200 to form a gas-liquid mixture, and the gas-liquid mixture enters the first filter assembly 300.
In an alternative embodiment, a backwash pump 210 is provided on the backwash water manifold 200, the backwash pump 210 being configured to increase the pressure of the gas-liquid mixture.
Specifically, set up backwash pump 210 on backwash water main pipe 200, backwash pump 210 increases the pressure of gas-liquid mixture, high-speed rotatory water pump impeller makes the recoil gas mix with backwash water is even together, under the pressure that the water pump lift caused, a large amount of gas melts into the aquatic, first filter assembly 300 is in the ordinary pressure state, thereby make behind the gas-liquid mixture entering first filter assembly 300 because the reduction of pressure and release a large amount of bubbles, be favorable to the come-up of filth in first filter assembly 300.
In an alternative embodiment, a backwash pump 210, a pressure gauge 220 and a flow meter 230 are sequentially provided on the backwash water header pipe 200 in the flow direction of the gas-liquid mixture.
Specifically, the pressure gauge 220 detects the pressure in the backwash water main pipe 200, and the flow meter 230 detects the flow in the backwash water main pipe 200, so that the worker can know the pressure and the flow in the backwash water main pipe 200.
In an alternative embodiment, each first filter assembly 300 is provided with a first backwash gas branch pipe 310 and a first backwash water branch pipe 320; each first backflushing gas branch pipe 310 is communicated with the backflushing gas main pipe 100; each first backwash water branch pipe 320 is communicated with the backwash water main pipe 200, and a gas-liquid mixture in the backwash water main pipe 200 can enter the first filter assembly 300 through the first backwash water branch pipe 320.
Specifically, the first filter assembly 300 is communicated with the backwash main pipe 200 through the first backwash water branch pipe 320, the first filter assembly 300 is communicated with the backwash main pipe 100 through the first backwash air branch pipe 310, the first backwash water branch pipe 320 and the first backwash air branch pipe 310 are both provided with control valves, when the first filter assembly 300 normally operates, the control valves are closed, and when the first filter assembly 300 backwashes, the control valves are opened.
In an alternative embodiment, the backwash water manifold 200 is provided with an inlet valve 240 for controlling the flow of backwash water to the backwash pump 210.
Specifically, a water inlet valve 240 is provided on the backwash water main pipe 200, and during the backwash process of the first filter assembly 300, the water inlet valve 240 is opened, and backwash water in the backwash water main pipe 200 is introduced into the first filter assembly 300 through the backwash pump 210.
In an alternative embodiment, the sewage filter further comprises a plurality of second filter assemblies 400 arranged in parallel; each second filter assembly 400 is provided with a second back flushing gas branch pipe 410; each of the second backflush gas branch pipes 410 is communicated with the backflush gas manifold 100.
Specifically, the first filter assembly 300 is a coarse-precision filter device, the second filter assembly 400 is a fine-precision filter device, liquid filtered by the first filter assembly 300 enters the second filter assembly 400 through the backwash water header pipe 200, the second filter assemblies 400 can be arranged in a plurality of numbers, the second filter assemblies 400 are arranged in parallel, the second filter assemblies 400 operate independently, and each second filter assembly 400 is communicated with the backwash air header pipe 100 through the second backwash air branch pipe 410, so that backwashing on the second filter assemblies 400 is facilitated.
The sewage filter that this embodiment provided, through backwash pump 210's setting, make the gaseous and backwash water of recoil mix into the gas-liquid mixture, the gas-liquid mixture drives the filth come-up easily, and is better to first filter assembly 300's back flush effect.
On the basis of the above embodiments, as shown in fig. 2 and fig. 3, the filter material collector provided by this embodiment includes: backwash assembly and separator body 500; the backwashing component comprises a backwashing gas main pipe 100 and a backwashing water main pipe 200; the separator body 500 is in communication with a back flushing gas manifold 100, the back flushing gas manifold 100 being configured to deliver back flushing gas to the separator body 500; the separator body 500 communicates with the backwash water header pipe 200, and the backwash water header pipe 200 is configured to be able to supply backwash water to the separator body 500.
Specifically, as the granular filter materials adopted by the first filter assembly 300 and the second filter assembly 400 are ground into small large particles along with the increase of the working time and the backwashing time, and small particles are ground into fine particles, and fine particles or powder are discharged along with the backwashing water flow, in order to maximize the utilization of the filter materials, the filter materials are collected, cleaned and sieved, backwashing sewage with the filter materials after backwashing in the first filter assembly 300 and the second filter assembly 400 enters the separator main body 500, the filter materials are collected by the separator main body 500 and are gradually accumulated in the separator main body 500 along with the increase of the collecting time, a filter material cleaning program needs to be carried out, and backwashing water and backwashing gas are conveyed into the separator main body 500.
In an alternative embodiment, a third backflushing gas branch pipe 510 and a third backflushing water branch pipe 520 are provided on the separator body 500; the third backflushing gas branch pipe 510 is communicated with the backflushing gas header pipe 100, and the third backflushing water branch pipe 520 is communicated with the backflushing water header pipe 200.
Specifically, the separator body 500 is specifically configured as a sand-water separator, wherein sand in the sand-water separator is a filter material, backwash water in the backwash air header pipe 100 enters the separator body 500 through the third backwash water branch pipe 520, backwash gas in the backwash gas branch pipe enters the separator body 500 through the third backwash gas branch pipe 510, and when a filter material cleaning procedure is started, control valves on the third backwash gas branch pipe 510 and the third backwash water branch pipe 520 are opened.
In an alternative embodiment, the filter media collector further comprises a collector body 600; the collector body 600 is communicated with the separator body 500, and the collector body 600 is used for trapping filter materials in the solid-liquid mixture flowing out of the separator body 500.
Specifically, after the filter material is cleaned, the control valves of the third back flushing branch pipe 510 and the third back flushing branch pipe 520 are closed, the pipeline between the collector body 600 and the separator body 500 is opened, the filter material flows into the collector body 600 under the gravity impact of the residual water, the filter material with a predetermined specification is retained through the stainless steel mesh arranged in the collector body 600, and the rest of the filter material enters the main sewage drain pipe.
The filter material collector provided by the embodiment intercepts the filter material in the backwashing water of the first filter assembly 300 and the second filter assembly 400 through the arrangement of the separator body 500 and the collector body 600, and saves the cost.
On the basis of the above embodiments, the backwashing method provided by this embodiment includes the following steps: opening the exhaust valve 120 to exhaust the excessive gas in the backflushing gas main pipe 100; closing the exhaust valve 120, opening the backflushing gas main valve 110, and allowing backflushing gas to enter the backflushing water main pipe 200 through the backflushing gas main pipe 100; backwash water enters the backwash water main pipe 200 to be mixed with gas to form a gas-liquid mixture, the gas-liquid mixture enters the first filter assembly 300 through the first backwash water branch pipe 320 after being pressurized, and a filter material in the first filter assembly 300 is backwashed to form backwash sewage with the filter material; the backflushing gas within the backflushing gas manifold 100 is intermittently admitted into the first filter assembly 300 through the first backflushing gas manifold 310.
Specifically, the exhaust valve 120 is opened to discharge excess gas, so that gas in the backwash water main pipe 200 is prevented from entering the filtering device, the exhaust valve 120 is closed to perform a backwash step, backwash gas enters the backwash water main pipe 200 through the backwash gas main pipe 100 to form a gas-liquid mixture, and the gas-liquid mixture enters the filtering assembly through the first backwash water branch pipe 320 after being pressurized, so that dirt in the first filtering assembly 300 can float upwards conveniently.
In an alternative embodiment, the method further comprises the following steps: backwash sewage with filter materials flows into the separator body 500; backwash water in the backwash water header pipe 200 enters the separator body 500 through the third backwash water branch pipe 520 to wash the trapped filter material; the backflushing gas in the backflushing gas main pipe 100 intermittently enters the separator main body 500 through the third backflushing gas branch pipe 510; the solid-liquid mixture within the separator body 500 enters the collector body 600 to trap the filter material in the solid-liquid mixture.
Specifically, backwash sewage with filter materials flows into the separator main body 500, the backwash sewage with filter materials stops water inflow, backwash water in the backwash water main pipe 200 enters the separator main body 500 through the third backwash water branch pipe 520, backwash gas in the backwash gas main pipe 100 intermittently enters the separator main body 500 through the third backwash gas branch pipe 510, trapped filter materials are cleaned, and after cleaning is finished, the filter materials flow into the filter material collector main body 600 under the gravity impact of residual water, and the filter materials in a solid-liquid mixture are trapped.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. A sewage filter, comprising: a backwashing assembly and a plurality of first filtering assemblies (300) which are arranged in parallel;
the backwashing component comprises a backwashing gas main pipe (100) and a backwashing water main pipe (200);
the plurality of first filter assemblies (300) are all communicated with the backflushing gas main (100), and the backflushing gas main (100) is configured to convey backflushing gas to the plurality of first filter assemblies (300);
-a plurality of said first filtering assemblies (300) are each in communication with said backwash water main (200), said backwash water main (200) being configured to be able to deliver backwash water to a plurality of said first filtering assemblies (300);
the backflushing gas main pipe (100) is sequentially provided with a backflushing gas main valve (110) and an exhaust valve (120) along the gas flowing direction, and the backflushing gas main valve (110) and the exhaust valve (120) are opposite in opening and closing state.
2. The sewage filter according to claim 1, wherein said backwash gas header pipe (100) is in communication with said backwash water header pipe (200), and gas in said backwash gas header pipe (100) can be introduced into said backwash water header pipe (200) to form a gas-liquid mixture, and delivered to a plurality of said first filter assemblies (300).
3. The sewage filter of claim 2, wherein a backwash pump (210) is provided to the backwash water header pipe (200), the backwash pump (210) being configured to increase the pressure of the gas-liquid mixture.
4. The sewage filter according to claim 3, wherein the backwash pump (210), the pressure gauge (220) and the flow meter (230) are sequentially provided on the backwash water header pipe (200) in a flow direction of the gas-liquid mixture.
5. The sewage filter according to claim 4, wherein each of the first filter assemblies (300) is provided with a first backwash gas branch pipe (310) and a first backwash water branch pipe (320);
each first backflushing air branch pipe (310) is communicated with the backflushing air main pipe (100);
each first backwashing water branch pipe (320) is communicated with the backwashing water main pipe (200), and the gas-liquid mixture in the backwashing water main pipe (200) can enter the first filter assembly (300) through the first backwashing water branch pipe (320).
6. The sewage filter of claim 4,
the backwashing water main pipe (200) is provided with a water inlet valve (240) for controlling the backwashing water to flow to the backwashing pump (210).
7. The sewage filter of claim 3,
the sewage filter also comprises a plurality of second filtering components (400) which are arranged in parallel;
each second filter assembly (400) is provided with a second backflush gas branch pipe (410);
each second backflushing air branch pipe (410) is communicated with the backflushing air main pipe (100).
8. A filter material collector, comprising: a backwash assembly and separator body (500);
the backwashing component comprises a backwashing gas main pipe (100) and a backwashing water main pipe (200);
the separator body (500) is in communication with the back flush gas manifold (100), the back flush gas manifold (100) configured to deliver back flush gas to the separator body (500);
the separator body (500) communicates with the backwash water main (200), the backwash water main (200) being configured to be able to deliver backwash water to the separator body (500).
9. The filter material collector of claim 8, wherein the separator body (500) is provided with a third backwash gas manifold (510) and a third backwash water manifold (520);
the third backflushing gas branch pipe (510) is communicated with the backflushing gas main pipe (100), and the third backflushing water branch pipe (520) is communicated with the backflushing water main pipe (200).
10. The filter media collector of claim 9, further comprising a collector body (600);
the collector body (600) is communicated with the separator body (500), and the collector body (600) is used for intercepting filter materials in a solid-liquid mixture flowing out of the separator body (500).
11. A backwash method, comprising the steps of:
opening an exhaust valve (120) to exhaust redundant gas in the recoil gas main pipe (100);
closing the exhaust valve (120), opening the back flushing gas main valve (110), and enabling the back flushing gas to enter the back flushing water main pipe (200) through the back flushing gas main pipe (100);
backwash water enters a backwash water main pipe (200) to be mixed with gas to form a gas-liquid mixture, the gas-liquid mixture enters a first filter assembly (300) through a first backwash water branch pipe (320) after being pressurized, and filter materials in the first filter assembly (300) are backwashed to form backwash sewage with the filter materials;
the backflushing gas in the backflushing gas main pipe (100) intermittently enters the first filtering assembly (300) through the first backflushing gas branch pipe (310).
12. The backwashing method of claim 11, further comprising the steps of:
backwash sewage with filter materials flows into the separator main body (500);
backwash water in the backwash water main pipe (200) enters the separator main body (500) through the third backwash water branch pipe (520) to clean the trapped filter material;
the backflushing gas in the backflushing gas main pipe (100) intermittently enters the separator main body (500) through the third backflushing gas branch pipe (510);
the solid-liquid mixture within the separator body (500) enters the collector body (600) to trap the filter material in the solid-liquid mixture.
CN201911211626.6A 2019-11-29 2019-11-29 Sewage filter, filter material collector and backwashing method Pending CN110759400A (en)

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