CN109078373B - Air backwashing unit for filter, method thereof and filter cleaning system - Google Patents
Air backwashing unit for filter, method thereof and filter cleaning system Download PDFInfo
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- CN109078373B CN109078373B CN201810708717.XA CN201810708717A CN109078373B CN 109078373 B CN109078373 B CN 109078373B CN 201810708717 A CN201810708717 A CN 201810708717A CN 109078373 B CN109078373 B CN 109078373B
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- 238000011001 backwashing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004140 cleaning Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 239000010865 sewage Substances 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/661—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps by using gas-bumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses an air backwashing unit for a filter, a method thereof and a filter cleaning system, and belongs to the field of sewage treatment. The air backwash unit includes: the device comprises a fan, an exhaust valve, a first valve, a plurality of first branch pipelines, a confluence pipeline, a plurality of second branch pipelines, a motor and a controller; the air outlet of the fan is communicated with the first ends of the first branch pipelines, the second ends of the first branch pipelines are communicated with the first end of the confluence pipeline, the first ends of the second branch pipelines are communicated with the second end of the confluence pipeline, and the second ends of the second branch pipelines are communicated with the air inlet of the filter; the confluence pipeline comprises a highest point and a lowest point, wherein the highest point is higher than the liquid level of the filter, and the lowest point is lower than the liquid level of the filter and higher than the air outlet of the fan and the air inlet of the filter; the exhaust valve is arranged at the lowest point on the confluence pipeline, and the first valve is arranged on the second branch pipeline; the motor is connected with the fan transmission, and discharge valve, first valve, motor all are connected with the controller electricity.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to an air backwashing unit for a filter, a method thereof and a filter cleaning system.
Background
In sewage treatment processes such as municipal sewage treatment, petrochemical industry sewage treatment, power industry sewage treatment and the like, a filter (for example, a pressure filter) is adopted to treat sewage. However, with the long-term operation of the filter, clogging of the filter inevitably occurs, affecting the filtering effect. It is therefore necessary to clean the filter periodically.
In the related art, the filter is mainly cleaned in a mode of combining water washing and air backwashing. Wherein, wind backwash unit includes: the device comprises a plurality of fans, a manual exhaust valve, a plurality of first branch pipelines, a confluence pipeline and a plurality of second branch pipelines. The air outlet of the fan is communicated with one end of one branch confluence pipeline, the other ends of the branch confluence pipelines are communicated with the confluence pipeline, the other end of the confluence pipeline is communicated with the second branch pipelines, and the second branch pipelines are communicated with the air inlet of the filter. The confluence pipeline is a horizontal pipe section and is higher than the liquid level of the filter. The manual exhaust valve is arranged on the collecting pipeline and is in a normally open state. The valve is arranged on the second branch pipeline.
The inventors found that the related art has at least the following problems:
in the related art, because the manual exhaust valve is in a normally open state, when the fan works, a part of air discharged by the fan is discharged into the atmosphere, so that the backwashing air quantity loss and the electric energy waste of the fan are caused.
Disclosure of Invention
The embodiment of the invention provides an air backwashing unit for a filter, a method thereof and a filter cleaning system, which can solve the technical problems. The specific technical scheme is as follows:
the embodiment of the invention provides an air backwashing unit for a filter, which comprises: the device comprises a plurality of fans, exhaust valves, first valves, a plurality of first branch pipelines, a confluence pipeline, a plurality of second branch pipelines, a plurality of motors and a controller;
an air outlet of the fan is communicated with a first end of the first branch pipeline, second ends of the first branch pipelines are communicated with a first end of the confluence pipeline, first ends of the second branch pipelines are communicated with a second end of the confluence pipeline, and second ends of the second branch pipelines are communicated with an air inlet of the filter;
the confluence pipeline comprises a highest point and a lowest point, wherein the highest point is higher than the liquid level of the filter, and the lowest point is lower than the liquid level of the filter and higher than the air outlet of the fan and the air inlet of the filter;
the exhaust valve is arranged at the lowest point on the confluence pipeline, and the first valve is arranged on the second branch pipeline;
the motor is connected with the fan in a transmission mode, and the exhaust valve, the first valve and the motor are all electrically connected with the controller.
In one possible design, the confluence pipeline comprises a first horizontal section, a first vertical section, a second horizontal section, a second vertical section and a third horizontal section which are communicated in sequence;
the tail ends of the first horizontal section and the third horizontal section are respectively communicated with the second end of the first branch pipeline and the first end of the second branch pipeline, and the first horizontal section and the third horizontal section are flush;
the exhaust valve is arranged on the second horizontal section.
In one possible design, the length of each of the first vertical section and the second vertical section is greater than or equal to ten times the inner diameter of the first branch line.
In one possible design, the exhaust valve is a pneumatic valve or a solenoid valve.
In one possible design, the wind backwash unit further comprises: a plurality of second valves;
the second valve is disposed on the first branch line.
In one possible design, the second valve is a manual valve or a check valve.
In another aspect, an embodiment of the present invention provides a wind backwashing method for a filter, which is applied to any one of the above-mentioned wind backwashing units for a filter, and comprises:
when the filter needs backwashing, the controller sequentially controls the exhaust valve to be opened and the motor to work, and the motor drives the fan to work;
then the controller controls the first valve to be opened and controls the exhaust valve to be closed, and air is sequentially input into the first branch pipeline, the confluence pipeline, the second branch pipeline and the filter by the fan so as to carry out air backwashing on the filter;
after the air backwashing is finished, the controller sequentially controls the first valve to be closed, the exhaust valve to be opened and the motor to stop working.
In one possible design, the wind backwash method further comprises: when the fan works, controlling a second valve to be opened;
and after the wind backwashing is finished, the controller sequentially controls the first valve to be closed, the exhaust valve to be opened, and the motor to stop working, and then controls the second valve to be closed.
In another aspect, an embodiment of the present invention provides a filter cleaning system, where the filter cleaning system includes: any one of the air backwashing unit for the filter, the water inlet pipeline, the water outlet pipeline and the water storage device mentioned above;
the air backwashing unit is communicated with an air inlet of the filter;
the first ends of the water inlet pipeline and the water outlet pipeline are communicated with the water storage equipment, the water inlet pipeline is used for inputting water into the filter, and the water outlet pipeline is used for outputting the water in the filter.
In one possible design, the filter cleaning system further includes: a plurality of third valves;
and one part of the third valve is arranged on the water inlet pipeline, and the rest part of the third valve is arranged on the water outlet pipeline.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
according to the air backwashing unit for the filter, provided by the embodiment of the invention, the highest point higher than the liquid level of the filter and the lowest point lower than the liquid level of the filter and higher than the air outlet of the fan and the air inlet of the filter are arranged, and the exhaust valve is arranged at the lowest point on the confluence pipeline, so that water flowing back to the confluence pipeline from the filter is discharged by the exhaust valve, and the fan is prevented from being damaged by the returned and discharged water and the first branch pipeline, the confluence pipeline and the second branch pipeline are prevented from being corroded. Before the fan starts, the exhaust valve is controlled to be opened through the controller, so that the motor overload during the starting of the fan can be avoided, and when the fan runs, the exhaust valve is controlled to be closed, so that the loss of air quantity and electric energy can be avoided, and the energy is saved. The wind backwashing unit is simple in structure and guarantees the backwashing effect of the filter and the reliable operation of the fan.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a wind backwash unit for a filter according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a filter cleaning system according to an embodiment of the present invention.
Wherein the reference numerals denote:
1-a fan, wherein the fan is arranged on the upper portion of the shell,
2-an exhaust valve is arranged at the lower part of the exhaust pipe,
3-a first valve, wherein the first valve is connected with the first valve,
4-the first branch line of the first branch line,
5-a confluence line, 501-a first horizontal segment, 502-a first vertical segment, 503-a second horizontal segment, 504-a second vertical segment, 505-a third horizontal segment,
6-a second branch line, which is,
7-a filter is arranged on the upper surface of the filter,
8-a second valve, which is arranged in the first valve,
9-a water inlet pipeline for water to enter the water tank,
10-a water outlet pipeline, wherein the water outlet pipeline is connected with a water inlet pipeline,
11-third valve.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In one aspect, an embodiment of the present invention provides an air backwash unit for a filter, as shown in fig. 1, the air backwash unit comprising: a plurality of fans 1, an exhaust valve 2, a first valve 3, a plurality of first branch lines 4, a confluence line 5, a plurality of second branch lines 6, a plurality of motors, and a controller (not shown). Wherein, the gas outlet of fan 1 and the first end intercommunication of first branch pipeline 4, the second end of many first branch pipelines 4 all communicates with the first end of conflux pipeline 5, the first end of many second branch pipelines 6 all communicates with the second end of conflux pipeline 5, the second end of second branch pipeline 6 and the air inlet intercommunication of filter 7. The confluence pipeline 5 comprises a highest point and a lowest point, wherein the highest point is higher than the liquid level of the filter 7, and the lowest point is lower than the liquid level of the filter 7 and is higher than the air outlet of the fan 1 and the air inlet of the filter 7. The exhaust valve 2 is disposed at the lowest point on the confluence line 5, and the first valve 3 is disposed on the second branch line 6. The motor is connected with the fan 1 in a transmission mode, and the exhaust valve 2, the first valve 3 and the motor are all electrically connected with the controller.
In the related art, because the filter 7 is filled with water during the wind backwashing process, and the fan 1 is generally arranged on the ground, the liquid level H1 of the filter 7 is higher than the outlet elevation H2 of the fan 1, and the outlet pressure P of the fan 1 is normally higher than the water pressure of the liquid level H1. However, when the backwashing is finished, the water in the filter 7 is discharged back to the blower 1 due to sudden pressure drop in the first branch line 4, the confluence line 5 and the second branch line 6 of the blower 1, untimely valve closing and the like. Even if the filter 7 is normally operated, water may be discharged back to the fan 1, and water may accumulate in the outlet pipeline of the fan 1. In addition, the first branch line 4, the confluence line 5, and the second branch line 6 are corroded by accumulated water in the first branch line 4, the confluence line 5, and the second branch line 6.
The working principle of the wind backwashing unit for the filter provided by the embodiment of the invention is described as follows:
when one filter 7 needs backwashing, the exhaust valve 2 is controlled to be opened through the controller, the controller controls the motor to work, and the motor drives the fan 1 to work. As the exhaust valve 2 is opened, the motor overload can be avoided when the fan 1 is started. Then the controller controls the first valve 3 to be opened and controls the exhaust valve 2 to be closed, and the air output by the fan 1 passes through the first branch pipeline 4, the confluence pipeline 5 and the second branch pipeline 6 in sequence and is input into the filter 7 so as to carry out wind backwashing on the filter 7. When the air backwashing is carried out, the exhaust valve 2 is controlled to be closed, so that the loss of air quantity and electric energy can be avoided.
After the wind backwashing is finished, the controller controls the first valve 3 to be closed, controls the exhaust valve 2 to be opened and controls the motor to stop working.
Although the first valve 3 is closed, leakage inevitably occurs, and when the water in the filter 7 is drained back, since the exhaust valve 2 is opened, the drained water can be drained by the exhaust valve 2, and the water is prevented from being drained back to the fan 1 or being retained in the first branch line 4, the confluence line 5, and the second branch line 6 to cause corrosion.
According to the air backwashing unit for the filter, provided by the embodiment of the invention, the highest point which is higher than the liquid level of the filter 7 and the lowest point which is lower than the liquid level of the filter 7 and is higher than the air outlet of the fan 1 and the air inlet of the filter 7 are arranged, and the exhaust valve 2 is arranged at the lowest point on the confluence pipeline 5, so that water which flows back to the confluence pipeline 5 through the filter 7 is discharged by the exhaust valve 2, and the fan 1 is prevented from being damaged by the returned and discharged water, and the first branch pipeline 4, the confluence pipeline 5 and the second branch pipeline 6 are prevented from being corroded. Before the fan 1 starts, the exhaust valve 2 is controlled to be opened through the controller, motor overload can be avoided when the fan 1 starts, when the fan 1 runs, the exhaust valve 2 is controlled to be closed, loss of air quantity and electric energy can be avoided, and energy is saved. The wind backwashing unit has a simple structure, and provides guarantee for the backwashing effect of the filter 7 and the reliable operation of the fan 1.
In view of the simple structure of the confluence pipeline 5 and the good effect of gas and water transmission, as an example, as shown in fig. 1, the confluence pipeline 5 comprises a first horizontal segment 501, a first vertical segment 502, a second horizontal segment 503, a second vertical segment 504, and a third horizontal segment 505 which are sequentially communicated; the ends of the first horizontal segment 501 and the third horizontal segment 505 are respectively communicated with the second end of the first branch pipeline 4 and the first end of the second branch pipeline 6, and the first horizontal segment 501 and the third horizontal segment 505 are flush; the exhaust valve 2 is disposed on the second horizontal section 503.
It will be appreciated that the confluence line 5 is of a similar U-shaped pipe structure, and the first vertical section 502 and the second vertical section 504 are of equal length and are arranged side by side. The first and third horizontal segments 501, 505 are the highest points of the confluence line 5, and the second horizontal segment 503 is the lowest point of the confluence line 5.
Furthermore, the provision of the collector line 5 eliminates the need for a U-shaped duct on the first branch line 4 of each fan 1, which greatly reduces the space occupied by the duct, particularly the repair space for the filter 7 attachment. And, set up discharge valve 2 at the minimum, further avoided the enrichment of ponding, avoided the influence of this section ponding to fan 1 outlet pressure, simultaneously, do benefit to the timely emission of ponding, avoid corroding first branch pipeline 4, conflux pipeline 5, second branch pipeline 6.
To ensure that the accumulated water in the confluence line 5 is completely discharged, the lengths of the first and second vertical sections 502 and 504 are each greater than or equal to ten times the inner diameter of the first branch line 4.
So set up, still can guarantee that the ponding that filter 7 returned the row only can collect and discharge through discharge valve 2 on converging pipeline 5, can not get into fan 1 to the safe operation of fan 1 has been guaranteed.
In the embodiment of the invention, the exhaust valve 2 is controlled by the controller to automatically open or close for exhausting or draining. Wherein, the discharge valve 2 can be selected into a plurality of kinds, can realize automatic opening or closing under the control of controller.
The exhaust valve 2 is, as an example, a pneumatic valve or an electromagnetic valve.
The two valves are easy to obtain, and the sensitivity of automatic opening or closing is high under the control action of the controller.
Further, in order to prevent the return water of the filter 7 from entering the fan 1 and damaging the fan 1, as shown in fig. 1, the wind backwashing unit provided in the embodiment of the present invention further includes: a plurality of second valves 8; a second valve 8 is arranged on the first branch line 4.
When the fan 1 is to be started, the second valve 8 is controlled to open. When the fan 1 stops working, the second valve 8 can be controlled to close so as to prevent the return water of the filter 7 from entering the fan 1 and damaging the fan 1.
Wherein, the second valve 8 is a manual valve or a check valve.
When the second valve 8 is a manual valve, it is convenient to manually control the opening or closing thereof. Before the fan 1 works, the manual valve is opened to facilitate the fan 1 to output air. After the fan 1 finishes working, the manual valve is closed to prevent the return drainage water of the filter 7 from entering the fan 1 and damaging the fan 1.
It will be appreciated that when the second valve 8 is a check valve, and when the fan 1 is delivering air to the outside, the flow passage of the check valve is open to facilitate the delivery of air. When the return water of the filter 7 is about to enter the fan 1, the overflow channel of the check valve is closed, and the return water is prevented from entering the fan 1.
As an example, the blower 1 is a roots blower 1.
The wind backwashing unit for the filter provided by the embodiment of the invention not only can be used in a sewage treatment process, but also can be easily modified from the established engineering to obtain the wind backwashing unit for the filter.
In another aspect, an embodiment of the present invention provides a wind backwashing method for a filter, which is applied to any one of the above-mentioned wind backwashing units for a filter, and which includes:
when the filter 7 needs backwashing, the exhaust valve 2 is sequentially controlled to be opened and the motor is controlled to work through the controller, and the motor drives the fan 1 to work.
Then the controller controls the first valve 3 to be opened and controls the exhaust valve 2 to be closed, and air is input into the first branch pipeline 4, the confluence pipeline 5, the second branch pipeline 6 and the filter 7 in sequence by the fan 1 so as to carry out wind backwashing on the filter 7.
After the wind backwashing is finished, the controller sequentially controls the first valve 3 to be closed, the exhaust valve 2 to be opened and the motor to stop working.
According to the air backwashing method for the filter, provided by the embodiment of the invention, the exhaust valve 2 is controlled to be closed when the fan 1 runs, so that the air quantity loss and the electric energy waste are avoided, and the energy is saved. The exhaust valve 2 is controlled to be opened before the fan 1 runs, so that the motor overload is avoided when the fan 1 is started. When the fan 1 stops running, the exhaust valve 2 is controlled to be opened, the return drainage of the filter 7 is discharged by the exhaust valve 2, and the fan 1 is prevented from being damaged and corroding the first branch pipeline 4, the confluence pipeline 5 and the second branch pipeline 6. The wind backwashing method for the filter is simple, guarantees the backwashing effect of the filter 7 and the reliable operation of the fan 1, and saves energy.
Considering that the damage to the fan 1 caused by the return water of the filter 7 entering the fan 1 after the wind backwashing is finished can be further avoided, the wind backwashing method for the filter provided by the embodiment of the invention further comprises the following steps: when the fan 1 works, the second valve 8 is controlled to be opened; after the wind backwashing is finished, the controller sequentially controls the first valve 3 to be closed, the exhaust valve 2 to be opened, and the second valve 8 to be closed after the motor is controlled to stop working.
When the fan 1 works, the second valve 8 is controlled to be opened, so that the fan 1 is facilitated to convey air outwards. When the wind backwashing is finished, the second valve 8 is controlled to be closed, so that the phenomenon that the return drainage of the filter 7 enters the fan 1 to damage the fan 1 can be avoided.
In another aspect, an embodiment of the present invention further provides a filter cleaning system, as shown in fig. 2, the filter cleaning system including: any of the above mentioned air backwash units for filters, filter 7, water inlet line 9, water outlet line 10, water storage means (not shown). Wherein, the wind backwashing unit is communicated with the air inlet of the filter 7; the first ends of the water inlet pipeline 9 and the water outlet pipeline 10 are both communicated with the water storage device, the water inlet pipeline 9 is used for inputting water into the filter 7, and the water outlet pipeline 10 is used for outputting the water in the filter 7.
When the filter 7 is cleaned, the water storage device fills water into the filter 7 through the water inlet pipeline 9, and the water storage device can also recover the water in the water storage device through the water outlet pipeline 10 to form water circulation. On the premise that the filter 7 is filled with water, the filter 7 is aerated by the air backwashing unit to perform air backwashing. The filter 7 can be efficiently cleaned by a combination of water backwashing and air backwashing.
It is considered that whether water can be supplied into the filter 7 or not can be easily controlled, or water can be supplied to the outside of the filter 7. As shown in fig. 2, the filter cleaning system according to the embodiment of the present invention further includes: a plurality of third valves 11; a part of the third valve 11 is arranged on the water inlet line 9, and the remaining part of the third valve 11 is arranged on the water outlet line 10.
The third valve 11 may be a manual valve or an electromagnetic valve. When the third valve 11 is an electromagnetic valve, the third valve 11 is electrically connected to the controller.
In the embodiment of the present invention, when the number of the filters 7 is plural, the cleaning of the plural filters 7 is an intermittent operation. The plurality of filters 7 adopt alternate backwashing, so that the condition that the plurality of filters 7 are backwashed simultaneously does not exist, and the uninterrupted sewage treatment process is ensured. That is, the wind backwash unit provided in the embodiment of the present invention may serve a plurality of filters 7.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An air backwash unit for a filter, the air backwash unit comprising: the air conditioner comprises a plurality of fans (1), exhaust valves (2), first valves (3), a plurality of first branch pipelines (4), a confluence pipeline (5), a plurality of second branch pipelines (6), a plurality of motors, a controller and a plurality of second valves (8);
an air outlet of the fan (1) is communicated with a first end of the first branch pipeline (4), second ends of the first branch pipelines (4) are communicated with a first end of the confluence pipeline (5), first ends of the second branch pipelines (6) are communicated with a second end of the confluence pipeline (5), and second ends of the second branch pipelines (6) are communicated with an air inlet of the filter (7);
the confluence pipeline (5) comprises a highest point and a lowest point, wherein the highest point is higher than the liquid level of the filter (7), and the lowest point is lower than the liquid level of the filter (7) and higher than the air outlet of the fan (1) and the air inlet of the filter (7);
the exhaust valve (2) is arranged at the lowest point on the confluence line (5), and the first valve (3) is arranged on the second branch line (6);
the motor is in transmission connection with the fan (1), and the exhaust valve (2), the first valve (3) and the motor are all electrically connected with the controller;
the second valve (8) is arranged on the first branch line (4).
2. A wind backwash unit for filters according to claim 1 wherein the bus line (5) comprises a first horizontal section (501), a first vertical section (502), a second horizontal section (503), a second vertical section (504), a third horizontal section (505) in serial communication;
the ends of the first horizontal segment (501) and the third horizontal segment (505) are respectively communicated with the second end of the first branch pipeline (4) and the first end of the second branch pipeline (6), and the first horizontal segment (501) and the third horizontal segment (505) are flush;
the exhaust valve (2) is arranged on the second horizontal section (503).
3. A wind backwash unit for filters according to claim 2 wherein the length of the first vertical section (502) and the second vertical section (504) are each greater than or equal to ten times the internal diameter of the first branch line (4).
4. A wind backwash unit for filter according to any of claims 1 to 3 characterized in that the exhaust valve (2) is a pneumatic or solenoid valve.
5. A wind backwash unit for filters according to any of claims 1 to 3 wherein the second valve (8) is a manual or a single flow valve.
6. A wind backwashing method for a filter, which is applied to the wind backwashing unit for the filter according to any one of claims 1 to 5, and comprises the following steps:
when the filter (7) needs backwashing, the controller sequentially controls the exhaust valve (2) to be opened and the motor to work, and the motor drives the fan (1) to work;
then, a controller controls a first valve (3) to be opened and controls an exhaust valve (2) to be closed, and air is sequentially input into a first branch pipeline (4), a confluence pipeline (5), a second branch pipeline (6) and the filter (7) through a fan (1) so as to carry out air backwashing on the filter (7);
after the air backwashing is finished, the controller sequentially controls the first valve (3) to be closed, the exhaust valve (2) to be opened and the motor to stop working.
7. The wind backwash method for a filter of claim 6 further comprising: when the fan (1) works, the second valve (8) is controlled to be opened;
after the wind backwashing is finished, the first valve (3) is sequentially controlled to be closed through the controller, the exhaust valve (2) is controlled to be opened, and the second valve (8) is controlled to be closed after the motor is controlled to stop working.
8. A filter cleaning system, comprising: an air backwash unit for a filter, filter (7), water inlet line (9), water outlet line (10), water storage apparatus as claimed in any one of claims 1 to 5;
the wind backwashing unit is communicated with the air inlet of the filter (7);
the first ends of the water inlet pipeline (9) and the water outlet pipeline (10) are communicated with the water storage equipment, the water inlet pipeline (9) is used for inputting water into the filter (7), and the water outlet pipeline (10) is used for outputting the water in the filter (7).
9. The filter cleaning system of claim 8, further comprising: a plurality of third valves (11);
a part of the third valve (11) is arranged on the water inlet pipeline (9), and the rest part of the third valve (11) is arranged on the water outlet pipeline (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810708717.XA CN109078373B (en) | 2018-07-02 | 2018-07-02 | Air backwashing unit for filter, method thereof and filter cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810708717.XA CN109078373B (en) | 2018-07-02 | 2018-07-02 | Air backwashing unit for filter, method thereof and filter cleaning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109078373A CN109078373A (en) | 2018-12-25 |
| CN109078373B true CN109078373B (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810708717.XA Active CN109078373B (en) | 2018-07-02 | 2018-07-02 | Air backwashing unit for filter, method thereof and filter cleaning system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007136273A (en) * | 2005-11-15 | 2007-06-07 | Toray Ind Inc | Pressurized type membrane filtration apparatus |
| CN202625873U (en) * | 2012-05-03 | 2012-12-26 | 李晨阳 | Groundwater purifying device with porous medium |
| CN103566767A (en) * | 2013-11-22 | 2014-02-12 | 厦门理工学院 | Air water reverse blowing and washing device used for tubular sintered membrane filter |
| CN204337856U (en) * | 2014-12-05 | 2015-05-20 | 北京佳瑞环境保护有限公司 | A kind of backwash air diffuser for filter tank |
| CN205598978U (en) * | 2016-04-07 | 2016-09-28 | 深圳市纯水一号水处理科技有限公司 | Air purge pipeline structure in ultrafiltration system |
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2018
- 2018-07-02 CN CN201810708717.XA patent/CN109078373B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007136273A (en) * | 2005-11-15 | 2007-06-07 | Toray Ind Inc | Pressurized type membrane filtration apparatus |
| CN202625873U (en) * | 2012-05-03 | 2012-12-26 | 李晨阳 | Groundwater purifying device with porous medium |
| CN103566767A (en) * | 2013-11-22 | 2014-02-12 | 厦门理工学院 | Air water reverse blowing and washing device used for tubular sintered membrane filter |
| CN204337856U (en) * | 2014-12-05 | 2015-05-20 | 北京佳瑞环境保护有限公司 | A kind of backwash air diffuser for filter tank |
| CN205598978U (en) * | 2016-04-07 | 2016-09-28 | 深圳市纯水一号水处理科技有限公司 | Air purge pipeline structure in ultrafiltration system |
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| CN109078373A (en) | 2018-12-25 |
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