CN112619238A - Stainless steel precise filtering device with multi-mode back washing structure and control method - Google Patents

Stainless steel precise filtering device with multi-mode back washing structure and control method Download PDF

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Publication number
CN112619238A
CN112619238A CN202011397134.3A CN202011397134A CN112619238A CN 112619238 A CN112619238 A CN 112619238A CN 202011397134 A CN202011397134 A CN 202011397134A CN 112619238 A CN112619238 A CN 112619238A
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liquid return
liquid
pipe
filter element
valve
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CN112619238B (en
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权泉
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/66Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/688Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention discloses a stainless steel precision filtering device with a multi-mode back washing structure and a control method, wherein the stainless steel precision filtering device comprises a liquid inlet pipe, a filtering cavity, a main filter element, a liquid outlet pipe, a liquid return pipeline and an auxiliary filter element; the main filter element is arranged in the filter cavity, the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the filter cavity, the liquid return pipeline is respectively connected with the filter cavity and the main filter element, and the auxiliary filter element is arranged on the liquid return pipeline; the scheme can be selected according to the requirements of the filter medium, for a general filter medium, a conventional backwashing step can be adopted for backwashing, for a high-value filter medium, a circulating dirt-containing filtering step can be adopted to be matched with an auxiliary filter core backwashing step for use, so that the high-value filter medium is recycled to the greatest extent, and the backwashing with the same medium is adopted, so that the environmental influence on the filtering operation is reduced, meanwhile, the influence on the introduction of the next filtering is reduced, and the filtering quality of the high-value filter medium is improved.

Description

Stainless steel precise filtering device with multi-mode back washing structure and control method
Technical Field
The invention relates to the technical field of filtration, in particular to a stainless steel precision filtering device with a multi-mode back washing structure and a control method.
Background
The filtration refers to the operation that under the action of driving force or other external force, liquid (or gas) in suspension (or heating gas containing solid particles) permeates through the medium, and the solid particles and other substances are intercepted by the filter medium, so that the solid and other substances are separated from the liquid (or gas);
the problems in the prior art are as follows:
1. when the filtered filtering device is cleaned, the filtering device needs to be cleaned independently, and the filtering device needs to be disassembled when the filtering device is cleaned, so that the filtering efficiency is greatly influenced, and the tightness of the filtering structure is also influenced by repeated disassembly and assembly;
2. during filtration, when the filtering structure is cleaned, the filtered medium cannot be filtered again for recycling, and particularly, a great amount of high-value filtering medium can be wasted.
3. For some special filter media, media which have requirements on the filtering environment can affect the filtering effect if being simply cleaned by water; such as for wine filtration.
Disclosure of Invention
Aiming at the problems, the scheme provides a stainless steel precise filtering device with a multi-mode back washing structure; the problem of influence filtration efficiency, and can't retrieve the filtration fast once more to high value medium when filter equipment washs among the current is solved to high value filter medium has also had certain requirement when wasing been solved.
The scheme is realized as follows:
the stainless steel precise filtering device with the multi-mode back washing structure comprises a liquid inlet pipe, a filtering cavity, a main filter element, a liquid outlet pipe, a liquid return pipeline and an auxiliary filter element; the main filter element is arranged in the filter cavity, the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the filter cavity, the liquid return pipeline is respectively connected with the filter cavity and the main filter element, and the auxiliary filter element is arranged on the liquid return pipeline.
Preferably, a partition plate is arranged in the filter cavity; the partition panel is cut apart the filter chamber into upper portion cavity and lower part cavity, be provided with the connector in the partition panel, the filtration liquid outlet and the connector connection of main filter core.
Preferably, the liquid return pipeline comprises a first liquid return pipe, a second liquid return pipe, a liquid return branch pipe, a liquid return inlet pipe, a liquid return outlet pipe and a liquid return pump; the first liquid return pipe is connected with the filtered space in the main filter element in a penetrating way, and the second liquid return pipe is connected with the lower cavity in a penetrating way; and the liquid return pump and the auxiliary filter element are both arranged in the liquid return pipeline.
Preferably, the length of the liquid return inlet and outlet pipe is respectively communicated with a first liquid return pipe and a second liquid return pipe; the liquid return branch pipe is respectively arranged with the first liquid return pipe and the liquid return inlet and outlet pipe.
Preferably, the liquid return pump is arranged on the first liquid return pipe, and the auxiliary filter element is arranged on the liquid return inlet and outlet pipe between the liquid return branch pipe and the second liquid return pipe.
Preferably, the liquid inlet pipe is provided with a first valve; a second valve is arranged on the liquid outlet, a third valve and a fourth valve are respectively arranged at the left end and the right end of the joint of the first liquid return pipe and the liquid return inlet-outlet pipe, a fifth valve is arranged on the liquid return branch pipe, a sixth valve is arranged on the first liquid return pipe, and a seventh valve is arranged on the second liquid return pipe; the left end and the right end of the joint of the second liquid return pipe and the liquid return inlet and outlet pipe are respectively provided with an eighth valve and a ninth valve.
Preferably, the liquid inlet pipe, the first liquid return pipe, the second liquid return pipe and the liquid return inlet pipe are all provided with a second pressure gauge, and the upper cavity is provided with a safety valve and a first pressure gauge.
A control method of a stainless steel precision filtering device with a multi-mode back washing structure; the method is characterized in that: the method comprises the following steps:
and (3) filtering: opening the first valve and the second valve, closing other rest valves, introducing liquid to be filtered from the liquid inlet pipe, allowing filtrate to pass through the main filter element, and discharging the filtered liquid from the liquid outlet pipe through the outlet end of the main filter element;
circulating, dirt containing and filtering: opening a fourth valve, a sixth valve, a seventh valve and an eighth valve, closing other residual valves, opening a liquid return pump, allowing liquid remained in the lower cavity to enter a liquid return inlet and outlet pipe through a second liquid return pipe, allowing the liquid return inlet and outlet pipe to enter an auxiliary filter element, displacing impurities in filtrate into the auxiliary filter element, allowing the liquid filtered by the auxiliary filter element to enter a post-filtration cavity of the main filter element through the first liquid return pipe under the driving of the liquid return pump, allowing the filtrate to move from inside to outside in the main filter element, and bringing the impurities on the main filter element into the lower cavity, repeating the steps, and forming a circulation in the liquid flowing direction until the impurities in the residual filtrate and the impurities on the main filter element are completely displaced onto the auxiliary filter element; waiting for the next filtering operation.
And (3) backwashing the auxiliary filter element: opening the third valve, the fifth valve, the eighth valve and the ninth valve, closing the rest valves, introducing an external water source or an air source into an inlet of the liquid return inlet and outlet pipe, opening the liquid return pump, enabling an external cleaning medium to flow along the directions of the liquid return pump, the first liquid return pipe, the liquid return branch pipe, the liquid return inlet and outlet pipe and the auxiliary filter element, and finally discharging an outlet which is attached to the auxiliary filter element and is provided with the liquid return inlet and outlet pipe;
in the auxiliary filter element backwashing step, when a water source is used for backwashing the auxiliary filter element, an air source is required to be flushed again for management and emptying.
The method also comprises the following steps of: opening a third valve, a sixth valve, a seventh valve and a ninth valve; close other residuals, open the liquid return pump, outside air supply or water source get into from the import of returning the liquid business turn over pipe, flow along the export direction of liquid return pump, first liquid return pipe, main filter core post-filtration space, second liquid return pipe and liquid business turn over pipe, have the export of liquid business turn over pipe finally to get rid of the impurity on the main filter core filter screen, guarantee that the high efficiency of next filtration operation goes on.
Compared with the prior art, the invention has the beneficial effects that:
1. the scheme can be selected according to the requirements of the filter medium, for a general filter medium, a conventional backwashing step can be adopted for backwashing, for a high-value filter medium, a circulating dirt-containing filtering step can be adopted to be matched with an auxiliary filter core backwashing step for use, so that the high-value filter medium is recycled to the greatest extent, and the backwashing with the same medium is adopted, so that the environmental influence on the filtering operation is reduced, meanwhile, the influence on the introduction of the next filtering is reduced, and the filtering quality of the high-value filter medium is improved.
Drawings
FIG. 1 is a schematic view of the construction of the integral filter unit of the present invention;
FIG. 2 is a schematic diagram of the filtration process of the present invention;
FIG. 3 is a schematic diagram of the cyclical contaminant-containing filtration process of the present invention;
FIG. 4 is a schematic illustration of a secondary filter element backwash process of the present invention;
FIG. 5 is a schematic view of a conventional backwash operation of the present invention;
in the figure: 1. a liquid inlet pipe; 2. a filter chamber; 3. a main filter element; 4. a liquid outlet pipe; 5. a return line; 6. an auxiliary filter element; 21. an upper cavity; 22. a lower cavity; 23. a partition panel; 24. a safety valve; 25. a first pressure gauge; 26. a second pressure gauge; 51. a first liquid return pipe; 52. a second liquid return pipe; 53. a liquid return branch pipe; 54. a liquid return inlet pipe and a liquid return outlet pipe; 55. returning to the liquid pump; 71. a first valve; 72. a second valve; 73. a third valve; 74. a fourth valve; 75. a fifth valve; 76. a sixth valve; 77. a seventh valve; 78. an eighth valve; 79. a ninth valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
Referring to fig. 1 to 5, the present invention provides a technical solution:
the stainless steel precise filtering device with the multi-mode back washing structure comprises a liquid inlet pipe 1, a filtering cavity 2, a main filter element 3, a liquid outlet pipe 4, a liquid return pipeline 5 and an auxiliary filter element 6; the main filter element 3 is arranged in the filter cavity 2, the liquid inlet pipe 1 and the liquid outlet pipe 4 are respectively communicated with the filter cavity 2, the liquid return pipeline 5 is respectively connected with the filter cavity 2 and the main filter element 3, and the auxiliary filter element 6 is arranged on the liquid return pipeline 5;
based on the structure, liquid enters the filter cavity 2 through the liquid inlet pipe 1 and is filtered by the main filter element 3, filtered impurities remain on the surface of the main filter element 3 and are discharged through the liquid outlet pipe 4, and the filtering mode of the main filter element 3 is an external-in and internal-out mode;
the filter cavity 2 comprises an upper cavity 21, a lower cavity 22 and a partition plate 23; partition panel 23 sets up in filter chamber 2, and partition panel 23 is cut apart filter chamber 2 and is become upper portion cavity 21 and lower part cavity 22, be provided with the connector in the partition panel 23, main filter core 3's filtration liquid outlet and connector connection, liquid after the filtration enters into upper portion cavity 21 through main filter core 3's liquid outlet, discharges through drain pipe 4 at last.
A safety valve 24 and a first pressure gauge 25 are arranged on the upper cavity 21; the first pressure gauge 25 is used for detecting the pressure condition in the upper cavity 21, the safety valve 24 is used for relieving the pressure in the upper cavity 21, and the safety performance of the filtering device in the liquid outlet process is ensured through the first pressure gauge 25 and the safety valve 24.
And a second pressure gauge 26 is arranged on the liquid inlet pipe 1, and the second pressure gauge 26 is used for detecting the pressure condition of liquid in the liquid inlet process.
The liquid return pipeline 5 comprises a first liquid return pipe 51, a second liquid return pipe 52, a liquid return branch pipe 53, a liquid return inlet and outlet pipe 54 and a liquid return pump 55; the first liquid return pipe 51 is connected with the filtered space in the main filter element 3 in a penetrating way, and the second liquid return pipe 52 is connected with the lower cavity 22 in a penetrating way; the liquid return pump 55 and the auxiliary filter element 6 are both arranged in the liquid return pipeline 5;
the lengths of the liquid return inlet and outlet pipes 54 are respectively communicated with a first liquid return pipe 51 and a second liquid return pipe 52; the liquid return branch pipe 53 is respectively arranged with the first liquid return pipe 51 and the liquid return inlet and outlet pipe 54;
the liquid return pump 55 is arranged on the first liquid return pipe 51, and the auxiliary filter element 6 is arranged on the liquid return inlet and outlet pipe 54 between the liquid return branch pipe 53 and the second liquid return pipe 52;
the liquid inlet pipe 1 is provided with a first valve 71; a second valve 72 is arranged on the liquid outlet, a third valve 73 and a fourth valve 74 are respectively arranged at the left end and the right end of the joint of the first liquid return pipe 51 and the liquid return inlet and outlet pipe 54, a fifth valve 75 is arranged on the liquid return branch, a sixth valve 76 is arranged on the first liquid return pipe 51, and a seventh valve 77 is arranged on the second liquid return pipe 52; the eighth valve 78 and the ninth valve 79 are respectively arranged at the left end and the right end of the joint of the second liquid return pipe 52 and the liquid return inlet and outlet pipe 54;
the first liquid return pipe 51, the second liquid return pipe 52 and the liquid return inlet and outlet pipe 54 are all provided with a second pressure gauge 26, and the second pressure gauge 26 is used for detecting respective pipeline pressure, so that abnormal pressure of the liquid return pipeline 5 is prevented, and damage to each component of the liquid return pipeline 5 is reduced.
A sewage discharge outlet is arranged at the end part of the liquid return inlet pipe 54 close to the second liquid return pipe 52, the other end of the liquid return inlet pipe 54 is communicated with an external water source or air source, and a back flush medium is conveyed into the liquid return pipeline 5 and the filter cavity 2 through the liquid return inlet pipe 54; then the impurities are discharged through a sewage outlet.
Based on the structure, the liquid return pump 55 provides power for the whole gas return pipeline, the auxiliary filter element 6 is used for filtering the medium in the liquid return pipeline 5 again, the filtrate is conveyed into the filter cavity 2 and recycled, and the conventional backwashing operation, the re-filtering operation of the filtered medium and the flushing operation of the high-value filtering medium and the medium of the main filter element 3 are completed through the matching of the pipelines and the use of valves.
Example 2
Based on the above embodiments, the present embodiment provides a control method for a stainless steel precision filtering apparatus with a multi-way back-washing structure; the method specifically comprises the following control methods:
and (3) filtering: opening the first valve 71 and the second valve 72, closing other remaining valves, introducing liquid to be filtered from the liquid inlet pipe 1, filtering filtrate from outside to inside through the main filter element 3, and discharging the filtered liquid from the liquid outlet pipe 4 through the outlet end of the main filter element 3, wherein filtered impurities remain on the outer wall of the main filter element 3 at the moment;
because the filter medium that lets in probably is high pressure medium, so need pay close attention to the figure of a manometer constantly, guarantee filterable pressure value and go on under the condition of safety, this device is used for high pressure medium to filter usually, carries out the filter-pressing through main filter core 3 with filtrating through pressure.
Circulating, dirt containing and filtering: the step is used for carrying out back flush on the main filter element 3 by the same medium and filtering the filtrate again; for high-value filtrate, if other external solutions are used for cleaning the main filter element 3, not only the high-value filter residue remaining on the main filter element 3 and attachments thereon are discharged to cause loss, but also external washing liquid can affect the filtering environment, and the quality of the high-value filtrate is affected when the high-value filtrate is filtered again, which is also a main problem encountered by the high-value filtrate at present;
by the method, the main filter element 3 can be cleaned by using the medium, the filter medium filtered by the main filter element 3 at the next time cannot be influenced, and high-value filter residues can be recycled and discharged again;
the specific application scene of the scheme can refer to the high-value wine filtering situation, and the quality of the filtered wine can be greatly influenced if other media are used for washing the wine filtering.
The method specifically comprises the steps of opening a fourth valve 74, a sixth valve 76, a seventh valve 77 and an eighth valve 78, closing other remaining valves, wherein partial impurities are already remained on the main filter, and a certain amount of filtrate is remained in the lower cavity 22 (since the filtering device adopts a mode of discharging the filtrate through an upper opening, a certain amount of filtrate is inevitably remained in the lower cavity 22), opening a liquid return pump 55, wherein the liquid remained in the lower cavity 22 enters a liquid return inlet and outlet pipe 54 through a second liquid return pipe 52, then enters the auxiliary filter element 6 in the liquid return inlet and outlet pipe 54, the impurities in the filtrate are replaced in the auxiliary filter element 6, the liquid filtered by the auxiliary filter element 6 is driven by the power of the liquid return pump 55 to enter a filtered cavity of the main filter element 3 through a first liquid return pipe 51 again, then in the main filter element 3, the filtrate moves from inside to outside, and the impurities on the main filter element 3 are brought into the lower cavity 22, and the same medium is used for back washing, so that impurities cannot be introduced into the main filter element 3, and the next filtration cannot be influenced; repeating the steps in the above way, and forming circulation in the liquid flowing direction until the impurities in the residual filtrate and the impurities on the main filter element 3 are completely replaced on the auxiliary filter element 6; waiting for the next filtering operation.
And (3) backwashing the auxiliary filter element: after the circulating dirt-containing filtering step, the auxiliary filter element 6 can be cleaned through the step, and the specific steps are that the third valve 73, the fifth valve 75, the eighth valve 78 and the ninth valve 79 are opened, the rest other valves are closed, an external water source or air source is introduced into the inlet of the return liquid inlet and outlet pipe 54, the return liquid pump 55 is opened, an external cleaning medium flows along the direction of the return liquid pump 55, the first return liquid pipe 51, the return liquid branch pipe 53, the return liquid inlet and outlet pipe 54 and the auxiliary filter element 6, and finally an outlet which is attached to the auxiliary filter element 6 and is provided with the return liquid inlet and outlet pipe 54 is discharged;
in the back flushing step of the auxiliary filter element 6, if a water source is used for back flushing the auxiliary filter element 6, an air source needs to be flushed again for management and evacuation, so that the residue of the water source in the pipeline is reduced to the maximum extent, and the influence of the outside on the internal filtration is reduced to the maximum extent.
Conventional backwashing operation steps: the step is suitable for the back washing operation of a general filtering medium, and after the general filtering operation, the specific steps are that the main filter element 3 is cleaned by adopting the conventional back washing operation, and the third valve 73, the sixth valve 76, the seventh valve 77 and the ninth valve 79 are opened; closing other residues, starting a liquid return pump 55, enabling an external air source or water source to enter from an inlet of a liquid return inlet/outlet pipe 54 and flow along the outlet directions of the liquid return pump 55, the first liquid return pipe 51, the filtered space of the main filter element 3, the second liquid return pipe 52 and the liquid return inlet/outlet pipe 54, and finally removing impurities on the filter screen of the main filter element 3 through an outlet of the liquid return inlet/outlet pipe 54 to ensure that the next filtering operation is performed efficiently;
the scheme can be selected according to the requirements of the filter medium, for a general filter medium, a conventional backwashing step can be adopted for backwashing, for a high-value filter medium, a circulating pollutant-containing filtering step can be adopted to be matched with a backwashing step of the auxiliary filter element 6 for use, so that the high-value filter medium is recycled to the greatest extent, and backwashing with the same medium is adopted, so that the environmental influence on the filtering operation is reduced, meanwhile, the influence on the introduction of the next filtering operation is reduced, and the filtering quality of the high-value filter medium is improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. From stainless steel accurate filter equipment who takes multimode back flush structure, its characterized in that: comprises a liquid inlet pipe, a filter cavity, a main filter element, a liquid outlet pipe, a liquid return pipeline and an auxiliary filter element; the main filter element is arranged in the filter cavity, the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the filter cavity, the liquid return pipeline is respectively connected with the filter cavity and the main filter element, and the auxiliary filter element is arranged on the liquid return pipeline.
2. The stainless steel precision filter device with a multimode backwashing structure of claim 1, wherein: a partition plate is arranged in the filter cavity; the partition panel is cut apart the filter chamber into upper portion cavity and lower part cavity, be provided with the connector in the partition panel, the filtration liquid outlet and the connector connection of main filter core.
3. The stainless steel precision filter device with a multimode backwash structure as in claim 2, wherein: the liquid return pipeline comprises a first liquid return pipe, a second liquid return pipe, a liquid return branch pipe, a liquid return inlet pipe and a liquid return pump; the first liquid return pipe is connected with the filtered space in the main filter element in a penetrating way, and the second liquid return pipe is connected with the lower cavity in a penetrating way; and the liquid return pump and the auxiliary filter element are both arranged in the liquid return pipeline.
4. The stainless steel precision filter device with a multimode backwash structure as in claim 3, wherein: the length of the liquid return inlet and outlet pipe is respectively communicated with a first liquid return pipe and a second liquid return pipe; the liquid return branch pipe is respectively arranged with the first liquid return pipe and the liquid return inlet and outlet pipe.
5. The stainless steel precision filter device with a multimode backwash structure as in claim 4, wherein: the liquid return pump is arranged on the first liquid return pipe, and the auxiliary filter element is arranged on a liquid return inlet pipe between the liquid return branch pipe and the second liquid return pipe.
6. The stainless steel precision filter device with a multimode backwash structure as in claim 5, wherein: the liquid inlet pipe is provided with a first valve; a second valve is arranged on the liquid outlet, a third valve and a fourth valve are respectively arranged at the left end and the right end of the joint of the first liquid return pipe and the liquid return inlet-outlet pipe, a fifth valve is arranged on the liquid return branch pipe, a sixth valve is arranged on the first liquid return pipe, and a seventh valve is arranged on the second liquid return pipe; the left end and the right end of the joint of the second liquid return pipe and the liquid return inlet and outlet pipe are respectively provided with an eighth valve and a ninth valve.
7. The stainless steel precision filter device with a multimode backwash structure as in claim 6, wherein: and the liquid inlet pipeline, the first liquid return pipe, the second liquid return pipe and the liquid return inlet and outlet pipe are respectively provided with a second pressure gauge, and the upper cavity is provided with a safety valve and a first pressure gauge.
8. A control method based on the filter device of any one of claims 1 to 7; the method is characterized in that: the method comprises the following steps:
and (3) filtering: opening the first valve and the second valve, closing other rest valves, introducing liquid to be filtered from the liquid inlet pipe, allowing filtrate to pass through the main filter element, and discharging the filtered liquid from the liquid outlet pipe through the outlet end of the main filter element;
circulating, dirt containing and filtering: opening a fourth valve, a sixth valve, a seventh valve and an eighth valve, closing other residual valves, opening a liquid return pump, allowing liquid remained in the lower cavity to enter a liquid return inlet and outlet pipe through a second liquid return pipe, allowing the liquid return inlet and outlet pipe to enter an auxiliary filter element, displacing impurities in filtrate into the auxiliary filter element, allowing the liquid filtered by the auxiliary filter element to enter a post-filtration cavity of the main filter element through the first liquid return pipe under the driving of the liquid return pump, allowing the filtrate to move from inside to outside in the main filter element, and bringing the impurities on the main filter element into the lower cavity, repeating the steps, and forming a circulation in the liquid flowing direction until the impurities in the residual filtrate and the impurities on the main filter element are completely displaced onto the auxiliary filter element; waiting for the next filtering operation.
And (3) backwashing the auxiliary filter element: and opening the third valve, the fifth valve, the eighth valve and the ninth valve, closing the rest valves, introducing an external water source or an air source into an inlet of the liquid return inlet and outlet pipe, opening the liquid return pump, enabling an external cleaning medium to flow along the directions of the liquid return pump, the first liquid return pipe, the liquid return branch pipe, the liquid return inlet and outlet pipe and the auxiliary filter element, and finally discharging an outlet which is attached to the auxiliary filter element and is provided with the liquid return inlet and outlet pipe.
9. The control method of a filtering apparatus according to claim 8, wherein: in the auxiliary filter element backwashing step, when a water source is used for backwashing the auxiliary filter element, an air source is required to be flushed again for management and emptying.
10. The control method of a filtering apparatus according to claim 8, wherein: the method also comprises the following steps of: opening a third valve, a sixth valve, a seventh valve and a ninth valve; close other residuals, open the liquid return pump, outside air supply or water source get into from the import of returning the liquid business turn over pipe, flow along the export direction of liquid return pump, first liquid return pipe, main filter core post-filtration space, second liquid return pipe and liquid business turn over pipe, have the export of liquid business turn over pipe finally to get rid of the impurity on the main filter core filter screen, guarantee that the high efficiency of next filtration operation goes on.
CN202011397134.3A 2020-12-03 2020-12-03 Stainless steel precise filtering device with multi-mode back washing structure and control method Active CN112619238B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113368599A (en) * 2021-08-16 2021-09-10 北京市一滴水环保科技有限公司 Water treatment filtration system

Citations (3)

* Cited by examiner, † Cited by third party
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