CN111375239A - Laminated self-cleaning filtering device and cleaning filtering method for sewage treatment - Google Patents
Laminated self-cleaning filtering device and cleaning filtering method for sewage treatment Download PDFInfo
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- CN111375239A CN111375239A CN202010336126.1A CN202010336126A CN111375239A CN 111375239 A CN111375239 A CN 111375239A CN 202010336126 A CN202010336126 A CN 202010336126A CN 111375239 A CN111375239 A CN 111375239A
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- 238000001914 filtration Methods 0.000 title claims abstract description 105
- 239000010865 sewage Substances 0.000 title claims abstract description 71
- 238000004140 cleaning Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000011001 backwashing Methods 0.000 claims abstract description 51
- 230000007797 corrosion Effects 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 12
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims description 27
- 239000012535 impurity Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 8
- 238000003475 lamination Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004075 wastewater filtration Methods 0.000 description 1
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Classifications
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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
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/688—Regenerating 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
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/603—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by flow measuring
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
Abstract
The invention discloses a laminated self-cleaning filtering device and a cleaning filtering method for sewage treatment. The invention has stable filtering efficiency and accurate filtering effect; the structure integration level is high, and the occupied area is small; the unique control valve structure realizes full-automatic control of filtration and backwashing by one valve; the high-efficiency self-cleaning performance is realized, and the energy and the water are saved during the flushing; a back washing water pump is not needed, so that the investment is low; the corrosion resistance is good, and the service life is long; the invention has wide application prospect when being used as a rear end advanced treatment device of the effluent of a secondary sewage treatment system under the condition of increasingly strict requirements on sewage treatment discharge standards.
Description
Technical Field
The invention relates to the field of water treatment filtering equipment, in particular to a laminated self-cleaning filtering device and a cleaning filtering method for sewage treatment, which are suitable for separating solid suspended particles of advanced treatment of a sewage treatment system, a circulating water treatment system and a reclaimed water recycling system so as to be recycled.
Background
With the development of society, the nation puts forward higher requirements on sewage treatment process and effluent standard, the discharge standard of sewage treatment plants and sewage treatment equipment is gradually improved to the first grade A standard, even the surface level V or IV standard, the effluent SS is required to be less than or equal to 5mg/L, the effluent of the traditional sewage treatment precipitation separation process can not meet the discharge standard requirement, and the advanced treatment is required, so that various filtering equipment is widely applied to the sewage treatment plants and sewage treatment equipment for upgrading modification and advanced treatment.
At present, quartz sand filters, activated carbon filters, multi-medium filters and the like are commonly used for sewage or wastewater treatment and filtration. The filters are generally called as mechanical filters and mainly used for absorbing particles and metal ions in water through filtration and interception, and the filters are large in size, complex in structure and multiple in external pipelines; easy blockage of filter materials, long cleaning time, large water consumption and the like, so that the filtering efficiency of the filter is greatly reduced.
Therefore, the novel sewage treatment filtering device which is small in size, high in efficiency, capable of being integrated into an integrated sewage treatment device, simple to operate and capable of achieving a full-automatic reverse cleaning function is a problem which needs to be solved urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the laminated self-cleaning filtering device and the cleaning and filtering method for sewage treatment, which have the advantages of high integration level, small volume, high filtering efficiency, low backwashing water consumption and automatic backwashing function.
The purpose of the invention is realized as follows:
a laminated self-cleaning filtering device for sewage treatment comprises an electric control valve 1, wherein the electric control valve 1 is arranged above a filter shell, and a laminated filter element 12 is arranged in the filter shell;
the electric control valve 1 is a three-position five-way electric control valve 1 and comprises a valve body 13 and a driving controller 11 arranged above the valve body; the valve body 13 is provided with a water inlet A, a water outlet B, a sewage discharge outlet C, an outer cavity interface D and an inner cavity interface E; an external thread 10 fixedly connected with the shell is distributed on the valve body 13; the driving controller 11 is provided with an adjusting operation panel 14 for displaying parameters and control buttons;
the filter shell comprises an upper shell 2 and a lower shell 3 which are fixedly connected together through a quick-open type clamp 5; the top of the upper shell is provided with an internal thread structure which is matched and connected with the external thread 10; the shell on two sides of the upper shell is provided with 2 fixed supports 9 with internal threads for fixing the filter;
the laminated filter element 12 comprises a flow guide part 6, a disc bracket 7, a filter disc 4 and a compression spring 7; the disc support 7 is connected with an inner cavity interface E on the valve body 13 through the flow guide piece 6;
the filter disc 4 is a circular ring sheet made of plastic, V-shaped radial filter channels with certain micron sizes are engraved on two surfaces of the filter disc 4, a plurality of filter lamination sheets are overlapped together and are arranged on a disc support 7, and a compression spring 8 is arranged at the tail end of the support and is used for compressing the filter disc 4;
the valve body 13, the filter shell comprising the upper shell 2 and the lower shell 3, the flow guide piece 6 positioned in the filter shell and the lamination support 7 are all made of corrosion-resistant high-strength plastics; the lower shell 3 is made of transparent plastic;
the quick-opening type hoop 5 used for connecting the upper shell 2 and the lower shell 3 and the compression spring 8 used for compressing are both made of corrosion-resistant stainless steel materials.
A cleaning and filtering method of a laminated self-cleaning and filtering device for sewage treatment comprises the following steps:
when the sewage treatment device is used for advanced sewage treatment, the outlet water of a secondary sedimentation tank is connected with a water inlet A of a filter through a pressure pump, a water outlet B of the filter is connected with a clean water tank or a reuse water system, and the cleaning outlet water is connected to a sewage discharge pipeline through a sewage discharge outlet C and is connected to a sludge tank or flows back to an adjusting tank;
after the pipeline is connected, the controller is started to enter an automatic control state, at the moment, the three-position five-way switch is connected with the driving controller 13 of the electric control valve 1 to drive the valve core to rotate to a 'normal washing' position, the water inlet A of the valve body is communicated with the outer cavity interface D, the sewage discharge port C is communicated with the inner cavity interface E, and the water outlet B is in a closed cut-off state;
at the moment, the driving controller 13 sends out an instruction, a filtering pressure pump is started, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, and enters between the laminated filter element 12 and the filter shell through an outer cavity interface D under the flow guide of the flow guide piece 6, liquid penetrates through the filter disc and enters the filter element under the action of fluid pressure, and solid impurities or suspended matters are intercepted by the filter disc;
the clean water filtered by the filter element flows out of the sewage draining outlet through the inner cavity interface E, and at the moment, the filter is in a 'normal washing' working state;
when the 'normal washing' working state is entered, the driving controller 13 starts timing, and is switched to the filtering state after the set time is reached, the normal washing time is generally set to be 1-2 minutes, and the normal washing time can be adjusted through the adjusting operation panel 14;
step two: after the set time of forward washing is reached, the driving controller 13 drives the valve core to rotate to a filtering position, the water inlet A of the valve body is still communicated with the outer cavity interface D, the water outlet B is communicated with the inner cavity interface E, and the sewage discharge port C is in a closed and cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, enters between the laminated filter element 12 and the filter shell through an outer cavity interface D under the flow guidance of the flow guide piece 6, liquid penetrates through the filter disc and enters the filter element under the action of fluid pressure, and solid impurities or suspended matters are intercepted by the filter disc;
the clean water filtered by the filter element flows out of the water outlet B through the inner cavity connector E, and at the moment, the filter is in a filtering working state;
when the filter enters a filtering working state, the driving controller 13 starts timing, solid impurities are continuously intercepted and accumulated along with the filtering, so that the filtering resistance is increased, the differential pressure is increased, the filtering efficiency is reduced, and the filter element needs to enter a backwashing state to backwash the filter element;
step three: after receiving a backwashing demand signal, the driving controller 13 drives the valve core to rotate to a backwashing position, a water inlet A of the valve body is communicated with an inner cavity interface E, a sewage discharge outlet C is communicated with an outer cavity interface D, and a water outlet B is in a closed cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, enters the filter element through an inner cavity interface E under the flow guide of a flow guide piece 6, a compression spring 8 for compressing a filtering disc 4 is compressed under the action of fluid pressure, the overlapped discs are loosened, flushing water passes through gaps among the discs and enters a filter cavity, solid impurities or suspended matters are discharged from a sewage discharge port through an outer cavity interface D, and therefore the disc filter can be backwashed;
because the two sides of the disc are provided with the radial V-shaped filtering channels which form a certain angle with the central line, under the pressure action of flushing water, the disc vibrates and rotates, dirt on the disc is thrown out by centrifugal force, water forms rotational flow in a filter cavity, and the dirt in the cavity is quickly cleaned and discharged, so that the device has extremely high efficiency and high speed in backwashing, the backwashing process is completed within a few seconds to tens of seconds, and the backwashing time can be adjusted by the adjusting operation panel 14;
and after the backwashing reaches the set time, the backwashing is switched to the normal washing state to prepare for the next filtration, and the process is repeated, so that the full-automatic self-cleaning and filtering process of the filter is realized.
In the first step: in the working state of 'forward washing', the filtered clean water is not directly discharged from the water outlet B but flows out from the sewage discharge outlet, so that the filter element and the pipeline of the filter are washed, impurities in the pipeline are prevented from entering a clean water system, and the filtering effect is ensured to the maximum extent;
in the second step: the backwashing state is controlled by three control modes, the first mode is time control, the backwashing state is automatically switched after the set filtering time is reached, the filtering time can be adjusted by adjusting the operation panel 14, and the controller can also receive an external differential pressure signal or a flow signal and set the differential pressure control mode or the flow control mode.
Has the positive and beneficial effects that: the invention has stable filtering efficiency and accurate filtering effect; the structure integration level is high, and the occupied area is small; the unique control valve structure realizes full-automatic control of filtration and backwashing by one valve; the high-efficiency self-cleaning performance is realized, and the energy and the water are saved during the flushing; a back washing water pump is not needed, so that the investment is low; the corrosion resistance is good, and the service life is long; the invention has wide application prospect when being used as a rear end advanced treatment device of the effluent of a secondary sewage treatment system under the condition of increasingly strict requirements on sewage treatment discharge standards.
Drawings
FIG. 1 is a schematic view of a half-section structure of the present invention:
FIG. 2 is a left side view of the present invention;
FIG. 3 is an isometric view of the present invention:
fig. 4 is a perspective view of the present invention:
FIG. 5 is a front view of the present invention:
in the figure, the following steps are carried out: the device comprises an electric control valve 1, an upper shell 2, a lower shell 3, a filter disc 4, a quick-opening type clamp 5, a flow guide piece 6, a disc support 7, a compression spring 8, a fixed support 9, a connecting thread 10, a driving controller 11, a laminated filter element 12, a valve body 13, an operation control panel 14, a water inlet A, a water outlet B, a sewage discharge outlet C, an outer cavity interface D and an inner cavity interface E.
Detailed Description
The invention is further described with reference to the following drawings and examples:
as shown in fig. 1, a laminated self-cleaning filtering device for sewage treatment comprises an electric control valve 1, wherein the electric control valve 1 is arranged above a filter shell, and a laminated filter element 12 is arranged in the filter shell;
as shown in fig. 1 and 5, the electric control valve 1 is a three-position five-way electric control valve 1, and comprises a valve body 13 and a drive controller 11 arranged above the valve body; the valve body 13 is provided with a water inlet A, a water outlet B, a sewage discharge outlet C, an outer cavity interface D and an inner cavity interface E; an external thread 10 fixedly connected with the shell is distributed on the valve body 13; the driving controller 11 is provided with an adjusting operation panel 14 for displaying parameters and control buttons, as shown in fig. 3;
the filter shell comprises an upper shell 2 and a lower shell 3 which are fixedly connected together through a quick-open type clamp 5; the top of the upper shell is provided with an internal thread structure which is matched and connected with the external thread 10; as shown in fig. 2 and 4, the two side shells of the upper shell are provided with 2 fixing supports 9 with internal threads for fixing the filter;
the laminated filter element 12 comprises a flow guide part 6, a disc bracket 7, a filter disc 4 and a compression spring 7; the disc support 7 is connected with an inner cavity interface E on the valve body 13 through the flow guide piece 6;
the filter disc 4 is a circular ring sheet made of plastic, V-shaped radial filter channels with certain micron sizes are engraved on two surfaces of the filter disc 4, a plurality of filter lamination sheets are overlapped together and are arranged on a disc support 7, and a compression spring 8 is arranged at the tail end of the support and is used for compressing the filter disc 4;
the valve body 13, the filter shell comprising the upper shell 2 and the lower shell 3, the flow guide piece 6 positioned in the filter shell and the lamination support 7 are all made of corrosion-resistant high-strength plastics; the lower shell 3 is made of transparent plastic;
the quick-opening type hoop 5 used for connecting the upper shell 2 and the lower shell 3 and the compression spring 8 used for compressing are both made of corrosion-resistant stainless steel materials.
Example 1
A cleaning and filtering method of a laminated self-cleaning and filtering device for sewage treatment comprises the following steps:
when the sewage treatment device is used for advanced sewage treatment, the outlet water of a secondary sedimentation tank is connected with a water inlet A of a filter through a pressure pump, a water outlet B of the filter is connected with a clean water tank or a reuse water system, and the cleaning outlet water is connected to a sewage discharge pipeline through a sewage discharge outlet C and is connected to a sludge tank or flows back to an adjusting tank;
after the pipeline is connected, the controller is started to enter an automatic control state, at the moment, the three-position five-way switch is connected with the driving controller 13 of the electric control valve 1 to drive the valve core to rotate to a 'normal washing' position, the water inlet A of the valve body is communicated with the outer cavity interface D, the sewage discharge port C is communicated with the inner cavity interface E, and the water outlet B is in a closed cut-off state;
at the moment, the driving controller 13 sends out an instruction, a filtering pressure pump is started, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, and enters between the laminated filter element 12 and the filter shell through an outer cavity interface D under the flow guide of the flow guide piece 6, liquid penetrates through the filter disc and enters the filter element under the action of fluid pressure, and solid impurities or suspended matters are intercepted by the filter disc;
the clean water filtered by the filter element flows out of the sewage draining outlet through the inner cavity interface E, and at the moment, the filter is in a 'normal washing' working state;
in the first step: in the working state of 'forward washing', the filtered clean water is not directly discharged from the water outlet B but flows out from the sewage discharge outlet, so that the filter element and the pipeline of the filter are washed, impurities in the pipeline are prevented from entering a clean water system, and the filtering effect is ensured to the maximum extent;
when the 'normal washing' working state is entered, the driving controller 13 starts timing, and is switched to the filtering state after the set time is reached, the normal washing time is generally set to be 1-2 minutes, and the normal washing time can be adjusted through the adjusting operation panel 14;
step two: after the set time of forward washing is reached, the driving controller 13 drives the valve core to rotate to a filtering position, the water inlet A of the valve body is still communicated with the outer cavity interface D, the water outlet B is communicated with the inner cavity interface E, and the sewage discharge port C is in a closed and cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, enters between the laminated filter element 12 and the filter shell through an outer cavity interface D under the flow guidance of the flow guide piece 6, liquid penetrates through the filter disc and enters the filter element under the action of fluid pressure, and solid impurities or suspended matters are intercepted by the filter disc;
the clean water filtered by the filter element flows out of the water outlet B through the inner cavity connector E, and at the moment, the filter is in a filtering working state;
when the filter enters a filtering working state, the driving controller 13 starts timing, solid impurities are continuously intercepted and accumulated along with the filtering, so that the filtering resistance is increased, the differential pressure is increased, the filtering efficiency is reduced, and the filter element needs to enter a backwashing state to backwash the filter element;
in the second step: the backwashing state is controlled by three control modes, the first mode is time control, the backwashing state is automatically switched after the set filtering time is reached, the filtering time can be adjusted by adjusting the operation panel 14, and the controller can also receive an external differential pressure signal or a flow signal and set the differential pressure control mode or the flow control mode.
Step three: after receiving a backwashing demand signal, the driving controller 13 drives the valve core to rotate to a backwashing position, a water inlet A of the valve body is communicated with an inner cavity interface E, a sewage discharge outlet C is communicated with an outer cavity interface D, and a water outlet B is in a closed cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from a water inlet A of the filter after being pressurized, enters the filter element through an inner cavity interface E under the flow guide of a flow guide piece 6, a compression spring 8 for compressing a filtering disc 4 is compressed under the action of fluid pressure, the overlapped discs are loosened, flushing water passes through gaps among the discs and enters a filter cavity, solid impurities or suspended matters are discharged from a sewage discharge port through an outer cavity interface D, and therefore the disc filter can be backwashed;
because the two sides of the disc are provided with the radial V-shaped filtering channels which form a certain angle with the central line, under the pressure action of flushing water, the disc vibrates and rotates, dirt on the disc is thrown out by centrifugal force, water forms rotational flow in a filter cavity, and the dirt in the cavity is quickly cleaned and discharged, so that the device has extremely high efficiency and high speed in backwashing, the backwashing process is completed within a few seconds to tens of seconds, and the backwashing time can be adjusted by the adjusting operation panel 14;
and after the backwashing reaches the set time, the backwashing is switched to the normal washing state to prepare for the next filtration, and the process is repeated, so that the full-automatic self-cleaning and filtering process of the filter is realized.
As mentioned above, the filtering discs 4 of the self-cleaning filter are provided with a large number of V-shaped grooves with certain micron size on both sides, a plurality of discs are laminated on the bracket 7, the grooves among the discs are crossed, thereby forming a series of deep filtering units with unique filtering channels, the discs are pressed by the spring 8 and the water flow pressure during filtering, the larger the differential pressure is, the stronger the pressing force is, and the self-locking high-efficiency filtering is ensured. During back washing, the pressing spring is pushed open under the reverse action of water pressure to form gaps between the discs, so that each disc is fully cleaned.
As mentioned above, the backwashing of the device also utilizes the filtering pressure pump, realizes self-cleaning by using the water before filtering, does not need to additionally arrange a backwashing water pump and a flushing water tank, has simple system structure, ensures that the water before filtering can not enter a clear water system after filtering in the forward cleaning process before filtering, is suitable for the occasion of sewage deep treatment, can also be used for similar scenes in circulating water treatment and reclaimed water recycling, and has wide applicability.
As mentioned above, the device has highly integrated filtering control valve and filter, one valve realizes the whole process of forward washing, filtering and back washing, the exterior has no any back washing pipeline, the volume is small, the weight is light, and the device is convenient to be integrated with integrated sewage treatment equipment.
As mentioned above, the filtering control valve and the filter body of the device are both made of corrosion-resistant high-strength plastic materials, are corrosion-resistant, and are suitable for sewage treatment, industrial wastewater treatment, circulating water treatment, reclaimed water reuse and the like.
The invention has the following advantages: 1. has stable filtering efficiency and accurate filtering effect. The unique disc design and micron-sized filtering precision ensure that only particles with the particle size smaller than the requirement can enter the system, so that the system is the most effective filtering system, a user can select filtering discs with different precisions according to the requirement, and the filtering precision can be selected within the range of 5-200 mu m; 2. the invention has high structure integration level and small occupied area. The device adopts a modular design, has high structural integration level and extremely small occupied area, does not have any external backwashing pipeline with the complexity of the traditional filter, has the volume of only one tenth of that of the traditional sand filter and the weight of only one twentieth of that of the traditional sand filter under the same filtering flow, and can be conveniently arranged in the integrated sewage treatment equipment; 3. the unique control valve structure realizes full-automatic control of filtration and backwashing by one valve. The specially designed three-position five-way electric rotary valve is adopted, and through different rotating positions of a valve core and matching with a flow passage structure of a filter, a control valve is used for replacing the functions of filtering, backwashing and forward washing which can be realized only by four electric valves of the traditional filter; 4. high back flushing efficiency, and saving energy and water during back flushing. The invention has extremely high backwashing performance, the device automatically switches between the states of filtering, backwashing and forward washing, the backwashing can be completed in only tens of seconds, the backwashing water consumption is extremely low, and the backwashing water consumption accounts for less than 0.5 percent of the water yield; 5. no need of back flushing water pump and less investment. The invention does not need a special back-washing water pump, but realizes back washing by using the filtering water-feeding pump through the switching of the control valve, and has simple system and low investment; 6. the corrosion resistance is good, and the service life is long: the control valve, the filter element and the shell are all made of novel plastic materials, corrosion resistance, aging resistance and no blockage are realized, and the filtering and backwashing effects are not deteriorated due to the service time.
The invention has wide application prospect when being used as a rear end advanced treatment device of the effluent of a secondary sewage treatment system under the condition of increasingly strict requirements on sewage treatment discharge standards. The above embodiments are described in detail, but the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention within the knowledge of those skilled in the art should be considered as the protection scope of the present application.
Claims (10)
1. The utility model provides a lamination formula self-cleaning filter equipment for sewage treatment which characterized in that: the electric control valve is arranged above the filter shell, and the laminated filter element is arranged in the filter shell.
2. The laminated self-cleaning filter device for sewage treatment according to claim 1, wherein: the electric control valve is a three-position five-way electric control valve and comprises a valve body and a driving controller arranged above the valve body; the valve body is provided with a water inlet, a water outlet, a sewage draining outlet, an outer cavity interface and an inner cavity interface; an external thread connected and fixed with the shell is arranged under the valve body; and the driving controller is provided with an adjusting operation panel for displaying parameters and controlling buttons.
3. The laminated self-cleaning filter device for sewage treatment according to claim 1, wherein: the filter shell comprises an upper shell and a lower shell which are connected and fixed together through a quick-opening type clamp; the top of the upper shell is provided with an internal thread structure which is matched and connected with the external thread; the shell on two sides of the upper shell is provided with 2 fixed supports with internal threads for fixing the filter.
4. The laminated self-cleaning filter device for sewage treatment according to claim 1, wherein: the laminated filter element comprises a flow guide piece, a disc support, a filter disc and a compression spring; the disc support is connected with the inner cavity interface on the valve body through the flow guide piece.
5. The laminated self-cleaning filter device for sewage treatment according to claim 4, wherein: the filter disc is a circular ring sheet made of plastic, V-shaped radial filter channels with certain micron sizes are engraved on two surfaces of the filter disc, a plurality of filter lamination sheets are overlapped and installed on a disc support, and a compression spring is installed at the tail end of the support and used for compressing the filter disc.
6. The laminated self-cleaning filter device for sewage treatment according to claim 4, wherein: the valve body, the filter shell comprising an upper shell and a lower shell, the flow guide piece positioned in the filter shell and the lamination support are all made of corrosion-resistant high-strength plastics; the lower shell is made of transparent plastic.
7. The laminated self-cleaning filter device for sewage treatment according to claim 3, wherein: the quick-opening type hoop used for connecting the upper shell and the lower shell and the compression spring are made of corrosion-resistant stainless steel materials.
8. A cleaning and filtering method of a laminated self-cleaning filtering device for sewage treatment according to claim 1, characterized by comprising the following steps:
when the device is used for advanced treatment of sewage treatment, the outlet water of a secondary sedimentation tank is connected with a water inlet of a filter through a pressure pump, a water outlet of the filter is connected with a clean water tank or a reuse water system, and the cleaning outlet water is connected to a sewage discharge pipeline through a sewage discharge outlet and is connected to a sludge tank or flows back to an adjusting tank;
after the pipelines are connected, starting the controller to enter an automatic control state, driving the valve core to rotate to a 'forward washing' position by the three-position five-way power-on control controller, communicating the water inlet of the valve body with the outer cavity interface, communicating the sewage discharge port with the inner cavity interface, and closing and stopping the water outlet;
at the moment, the driving controller 13 sends out an instruction, a filtering pressure pump is started, the effluent of the secondary sedimentation tank flows in from the water inlet of the filter after being pressurized, and enters between the laminated filter element and the filter shell through the outer cavity interface under the guide of the guide part, and under the action of fluid pressure, liquid penetrates through the filtering disc and enters the filter element, and solid impurities or suspended matters are intercepted by the filtering disc;
the clean water filtered by the filter element flows out of the sewage outlet through the inner cavity interface, and at the moment, the filter is in a 'normal washing' working state;
when the 'normal washing' working state is entered, the driving controller starts timing, and is switched to a filtering state after the set time is reached, the normal washing time is generally set to be 1-2 minutes, and the normal washing time can be adjusted by adjusting the operation panel;
step two: after the set time of forward washing is reached, the driving controller drives the valve core to rotate to a filtering position, the water inlet of the valve body is still communicated with the outer cavity interface, the water outlet is communicated with the inner cavity interface, and the sewage discharge port is in a closed and cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from the water inlet of the filter after being pressurized, enters between the laminated filter element and the filter shell through the outer cavity interface under the guiding of the guiding part, and under the action of fluid pressure, liquid penetrates through the filter disc and enters the filter element, and solid impurities or suspended matters are intercepted by the filter disc;
the clean water filtered by the filter element flows out of the water outlet through the inner cavity connector, and at the moment, the filter is in a filtering working state;
when the filter enters a filtering working state, the driving controller starts to time, solid impurities are continuously intercepted and accumulated along with the filtering, so that the filtering resistance is increased, the differential pressure is increased, the filtering efficiency is reduced, and the filter element needs to enter a backwashing state to backwash the filter element;
step three: after a backwashing demand signal is received, the driving controller drives the valve core to rotate to a backwashing position, a water inlet of the valve body is communicated with the inner cavity interface, a sewage discharge outlet is communicated with the outer cavity interface, and a water outlet is in a closed cut-off state;
at the moment, the effluent of the secondary sedimentation tank flows in from the water inlet of the filter after being pressurized, enters the filter element through the inner cavity interface under the flow guide of the flow guide piece, the compression spring compressing the filter discs is compressed under the action of fluid pressure, the overlapped discs are loosened, the flushing water passes through the gaps between the discs and enters the cavity of the filter, and solid impurities or suspended matters are discharged from the sewage outlet through the outer cavity interface, so that the disc can be backwashed by the filter;
because the two sides of the disc are provided with the radial V-shaped filtering channels which form a certain angle with the central line, under the pressure action of flushing water, the disc vibrates and rotates, dirt on the disc is thrown out by centrifugal force, water forms rotational flow in a filter cavity, and the dirt in the cavity is quickly cleaned and discharged, so that the device has extremely high efficiency and high speed in backwashing, the backwashing process is completed within a few seconds to tens of seconds, and the backwashing time can be adjusted by adjusting the operation panel;
and after the backwashing reaches the set time, the backwashing is switched to the normal washing state to prepare for the next filtration, and the process is repeated, so that the full-automatic self-cleaning and filtering process of the filter is realized.
9. The cleaning and filtering method of the laminated self-cleaning filtering device for sewage treatment according to claim 8, characterized in that: in the first step: under "just washing" operating condition, the clear water after the filtration is not directly discharged from the delivery port, but flows out from the drain, and the purpose is to wash filter core and pipeline, avoids impurity to get into clear water system in the pipeline, and furthest guarantees the filter effect.
10. The cleaning and filtering method of the laminated self-cleaning filtering device for sewage treatment according to claim 8, characterized in that: in the second step: the first control mode is time control, when the set filtering time is reached, the control mode is automatically switched to the backwashing state, the filtering time can be adjusted by adjusting an operation panel, and the controller can also receive an external differential pressure signal or a flow signal and set to be a differential pressure control mode or a flow control mode.
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