CN113354086A - Biological aerated filter capable of realizing multi-mode operation and control method thereof - Google Patents
Biological aerated filter capable of realizing multi-mode operation and control method thereof Download PDFInfo
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- CN113354086A CN113354086A CN202110619123.3A CN202110619123A CN113354086A CN 113354086 A CN113354086 A CN 113354086A CN 202110619123 A CN202110619123 A CN 202110619123A CN 113354086 A CN113354086 A CN 113354086A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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Abstract
The invention discloses a biological aerated filter capable of realizing multi-mode operation and a control method thereof, wherein the biological aerated filter comprises the following steps: the aeration biological filter grids are oppositely arranged on two sides of the pipe gallery, and a back flush drainage channel, a water outlet channel, a water inlet channel, a water distribution well and a glass skylight are arranged above the pipe gallery; each aeration biological filter lattice is correspondingly provided with a water distribution well, and the interior of each aeration biological filter lattice is divided into a water inlet distribution well and a water return distribution well by a partition wall; each water inlet distribution well and the corresponding water inlet channel are arranged on the same wall, and are provided with regulating weir plates; the water inlet and return distributing well is also arranged in a common wall; each aeration biological filter lattice is provided with a single-lattice filter inlet pipe, a single-lattice filter return pipe, a single-lattice filter aeration pipe, a single-lattice filter backwashing inlet pipe, a single-lattice filter drain pipe and a single-lattice filter blow-down pipe, and each pipeline is provided with an electric control valve. The operation mode of the biological aerated filter can be flexibly adjusted, different functional requirements are realized, the water inflow impact load resistance is improved, the operation stability is improved, the head loss can be reduced, and the occupied area is small.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a biological aerated filter capable of realizing multi-mode operation and a control method thereof.
Background
The biological aerated filter integrates the interception and filtration efficiency of a filter layer and the strong oxidative degradation capability of a biological membrane, can effectively remove suspended matters and organic matters in sewage, and can also realize nitrification, denitrification and removal of harmful substances. According to different treatment purposes, the existing aeration biological filter tank generally consists of a decarbonization tank, a nitrification tank and a denitrification tank.
Due to the improvement of urban sewage treatment standards, the existing advanced treatment process needs to have nitrification and denitrification functions by selecting a biological aerated filter, and usually, a denitrification tank can be selected to be positioned in front of a nitrification tank or a denitrification tank can be selected to be positioned behind the nitrification tank.
However, the biological aerated filter of the series combined process of the nitrification tank and the denitrification tank at least has the following defects:
(1) the difference between the top of the nitrification tank and the denitrification tank is 3m in elevation, and the problem of large head loss exists.
(2) Compared with a non-series combined process, the lift of the secondary lift pump is at least higher than 3m, and the problem of high energy consumption exists.
(3) The transition section of the water channel communicated between the nitrification tank and the denitrification tank needs to be arranged, so that the problem of large occupied area exists.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide the biological aerated filter capable of realizing multi-mode operation and the control method thereof, and can solve the problems of large water head loss, high energy consumption, large occupied area and the like of the biological aerated filter formed by combining the conventional nitrification tank and the denitrification tank in series.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides a biological aerated filter capable of realizing multi-mode operation, which comprises:
the aeration biological filter lattices are respectively arranged on two sides of the pipe gallery, every two aeration biological filter lattices on the two sides are arranged oppositely, and the number of the total aeration biological filter lattices is even;
the aeration biological filter lattice on each side is provided with a back flush drainage channel, a water outlet channel and a water inlet channel which are matched;
the back-flushing drainage channel and the water outlet channel are arranged above the pipe gallery in parallel, the back-flushing drainage channel is positioned on one side of the aeration biological filter lattice on the same side, and the water inlet channel is positioned above the water outlet channel;
the top of the partition wall of the backwashing drainage channel matched with each aeration biological filter lattice is provided with a backwashing drainage regulating weir plate, and the top of each aeration biological filter lattice is communicated with the inside of the backwashing drainage channel through the backwashing drainage regulating weir plate;
the top of a partition wall between the backwashing drainage channel and the adjacent water outlet channel is provided with a water outlet adjusting weir plate, the height of the water outlet adjusting weir plate is higher than that of the backwashing drainage adjusting weir plate, and the top of the aeration biological filter lattice is communicated with the water outlet channel through the backwashing drainage adjusting weir plate and the water outlet adjusting weir plate in sequence;
each aeration biological filter lattice is provided with a matched water distribution well, the water distribution well is arranged between the water outlet channel and the water inlet channel 1 at two sides, the interior of each water distribution well is divided into a water inlet distribution well and a water return distribution well by a partition wall, the water inlet distribution well is connected with the bottom of the aeration biological filter lattice corresponding to the water inlet distribution well through a single-lattice filter water inlet pipe, and the water return distribution well is connected with a total return water pipeline through a single-lattice filter return pipe;
a single-pore membrane aerator is arranged in each aeration biological filter lattice and is connected with the single-lattice filter tank aeration pipe;
the bottom of each aeration biological filter lattice is respectively connected with a single-lattice filter backwashing water inlet pipe d, a single-lattice filter backwashing air inlet pipe e and a single-lattice filter emptying pipe, wherein the other end of the single-lattice filter backwashing water inlet pipe d is connected with a backwashing water pump, the other end of the single-lattice filter backwashing air inlet pipe e is connected with a backwashing fan, and the single-lattice filter emptying pipe g is connected with a plant area emptying header pipe through a header pipe;
and a glass skylight is arranged in the space between the adjacent distributing wells.
The embodiment of the invention also provides a control method of the biological aerated filter capable of realizing multi-mode operation, which is used for controlling the biological aerated filter capable of realizing multi-mode operation to operate according to a nitrification operation mode, a denitrification operation mode and a nitrification and denitrification simultaneous operation mode and comprises the following steps:
controlling to open a single-lattice filter water inlet pipe and a single-lattice filter aeration pipe which are correspondingly connected with each biological aerated filter lattice of the biological aerated filter, and controlling to close a correspondingly connected single-lattice filter return pipe, so that the biological aerated filter operates according to a nitrification operation mode;
controlling to open a single-lattice filter water inlet pipe and a single-lattice filter return pipe which are correspondingly connected with each biological aerated filter lattice of the biological aerated filter, and controlling to close a single-lattice filter aeration pipe which is correspondingly connected, so that the biological aerated filter operates according to a denitrification operation mode;
and controlling part of the aeration biological filter lattices of the aeration biological filter to operate according to a nitrification operation mode, and controlling the rest of the aeration biological filter lattices to operate according to a denitrification operation mode.
According to the technical scheme provided by the invention, the biological aerated filter capable of realizing multi-mode operation and the control method thereof provided by the embodiment of the invention have the beneficial effects that:
the aeration biological filter capable of realizing multi-mode operation is formed by oppositely arranging the aeration biological filter grids on two sides of the pipe gallery, arranging the water inlet channel, the water outlet channel, the back flush drainage channel, the water distribution well and the glass skylight above the pipe gallery, and respectively connecting the water inlet channel, the water outlet channel, the back flush drainage channel and the water distribution well with the corresponding aeration biological filter grids through pipelines. The biological aerated filter can be used in the advanced treatment section of a sewage treatment plant, is influenced by the fluctuation of the quality of inlet water and the effect of secondary biochemical treatment, has different quality of inlet water entering the biological aerated filter, has the same standard of the quality of outlet water, has different types and concentrations of pollutants to be removed, and can be flexibly adjusted by an operation mode to realize different functional requirements; the water inflow impact load resistance is improved, the operation stability is improved, and the secondary treatment operation pressure is relieved; compared with the existing nitrification filter and denitrification filter series combination mode, all the aeration biological filter grids are on the same height, and the head loss is reduced. Meanwhile, each unit is more compact in arrangement, and the occupied area is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are 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 the drawings without creative efforts.
FIG. 1 is a schematic plan view of a biological aerated filter according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a biological aerated filter according to the practice of the present invention;
FIG. 3 is a schematic longitudinal sectional view of a distribution well of a biological aerated filter according to the embodiment of the invention;
the parts corresponding to each mark in the figure are: 1-water inlet channel; 2-distributing well; 21-water inlet and distribution well; 22-a backwater distribution well; 3-aeration biological filtration lattice; 4-backwashing drainage channels of the single-lattice filter; 41-backwashing drainage regulating weir plate; 5-water outlet channel; 51-water outlet regulating weir plate; 6-pipe gallery; 7-a glass skylight; 8-adjusting the weir plate; a-a water inlet pipe of the single-lattice filter; b-a single-lattice filter return pipe; c-a single-lattice filter aeration pipe; d-backwashing a water inlet pipe of the single-lattice filter; e-backwashing the air inlet pipe by the single-lattice filter; f-a single-lattice filter tank drain pipe; g-single lattice filter emptying pipe.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, 2 and 3, an embodiment of the present invention provides a biological aerated filter capable of realizing multi-mode operation, including:
the two sides of the pipe gallery 6 are respectively provided with the aeration biological filter lattices 3, the aeration biological filter lattices 3 on the two sides are arranged in pairs oppositely, the number of the total aeration biological filter lattices 3 is even, namely, the total number of the aeration biological filter lattices 3 on the two sides is even;
the aeration biological filter lattices 3 on each side are provided with a back flush drainage channel 4, a water outlet channel 5 and a water inlet channel 1 which are matched;
the back-flushing water drainage channel 4 and the water outlet channel 5 are arranged above the pipe gallery 6 in parallel, the back-flushing water drainage channel 4 is positioned at one side of the aeration biological filter grid 3 at the same side, and the water inlet channel 1 is positioned above the water outlet channel 5;
the top of the partition wall of each aeration biological filter lattice 3 and the matched backwashing drainage channel 4 is provided with a backwashing drainage regulating weir plate, and the top of the aeration biological filter lattice 3 is communicated with the inside of the backwashing drainage channel 4 through the backwashing drainage regulating weir plate 41;
the top of the separation wall between the backwashing drainage channel 4 and the adjacent water outlet channel 5 is provided with a water outlet adjusting weir plate, the height of the water outlet adjusting weir plate 51 is higher than that of the backwashing drainage adjusting weir plate 41, and the top of the aeration biological filter grid 3 is communicated with the water outlet channel 5 through the backwashing drainage adjusting weir plate 41 and the water outlet adjusting weir plate 51 in sequence;
each aeration biological filter lattice 3 is provided with a matched distribution well 2, the distribution well 2 is arranged between a water outlet channel 5 and a water inlet channel 1 at two sides, the interior of each distribution well 2 is divided into a water inlet distribution well 21 and a water return distribution well 22 by a partition wall, the water inlet distribution well 21 is connected with the bottom of the aeration biological filter lattice 3 corresponding to the water inlet distribution well 21 through a single-lattice filter water inlet pipe a, and the water return distribution well 22 is connected with a total return water pipeline through a single-lattice filter return pipe b; the other end of the total reflux water pipeline is connected with a submersible sewage pump or a dry pump for reflux of the effluent of the biological aerated filter or the total effluent of the whole plant; the total return water pipeline can be the effluent of the biological aerated filter or the total effluent of the whole plant.
A single-pore membrane aerator is arranged in each aeration biological filter lattice 3 and is connected with a single-lattice filter aeration pipe c;
the bottom of each aeration biological filter lattice 3 is respectively connected with a single-lattice filter backwashing water inlet pipe d, a single-lattice filter backwashing air inlet pipe e and a single-lattice filter emptying pipe g, wherein the other end of the single-lattice filter backwashing water inlet pipe d is connected with a backwashing water pump, the other end of the single-lattice filter backwashing air inlet pipe e is connected with a backwashing fan, and the single-lattice filter emptying pipe g is connected with a plant area emptying header pipe through a header pipe.
In the biological aerated filter, a plurality of biological aerated filter lattices 3 are arranged on two sides of the pipe gallery 6, and the biological aerated filter lattices 3 on the two sides are symmetrically arranged in pairs;
two distributing wells 2 corresponding to the aeration biological filter lattices 3 with opposite two sides are arranged side by side;
a glass skylight 7 is arranged between two groups of water distribution wells 2 which are adjacent at intervals, the water distribution wells 2 and the glass skylight 7 are alternately arranged right above the pipe gallery 6 and are clamped between the water inlet channel 1 and the water outlet channel 5 which are symmetrically arranged on two sides, namely, the water inlet channel 1 and the water outlet channel 5 are arranged on each side, and the water distribution wells 2 and the glass skylight 7 which are alternately arranged between the water inlet channel 1 and the water outlet channel 5 on the two sides are arranged. The glass skylight 7 can improve the lighting effect in the pipe gallery 6.
In the biological aerated filter, the water inlet channel 1 and a matched water distribution well of the adjacent biological aerated filter cell 3 are arranged in a common wall mode, and are particularly arranged in a common wall mode with a water inlet distribution well 21 of the water distribution well 2, and a regulating weir plate 8 (which can be called as a first regulating weir plate) is arranged at the top of the common wall; the total water distribution to each aeration biological filter lattice can be realized by adjusting the weir plate 8.
In the aeration biological filter, at least two aeration biological filter grids 3 are arranged on each side, and the total number of the aeration biological filter grids 3 is even. Preferably, the height of each aeration biological filter grid 3 is the same, and the aeration biological filter grids are upward flow type biological filters with square pool bodies. Specifically, a filter plate, a non-blocking long-handle filter head, a supporting layer and a filter material layer are sequentially arranged in each aeration biological filter lattice from bottom to top; and a single-hole membrane aerator is arranged in the supporting layer and is connected with the aeration pipe of the single-lattice filter.
In the biological aerated filter, the top of the partition wall between the water inlet distribution well and the water return distribution well of each distribution well is provided with the adjusting weir plate (which can be called as a second adjusting weir plate), so that the mixing of the water inlet and the return water of the single biological aerated filter lattice can be conveniently realized.
In the biological aerated filter, an inlet pipe a of the single-lattice filter, a return pipe b of the single-lattice filter, an aeration pipe c of the single-lattice filter, a back-flushing inlet pipe d of the single-lattice filter, a back-flushing inlet pipe e of the single-lattice filter, a drain pipe f of the single-lattice filter and an emptying pipe g of the single-lattice filter are all provided with electric control valves;
further comprising: and the control device is electrically connected with the electric control valves on the pipelines respectively and can control the opening or closing of the electric control valves according to a preset nitrification operation mode, a denitrification operation mode and a nitrification and denitrification simultaneous operation mode.
Specifically, when only the nitrification operation mode is used, the operating biological aerated filter grids 3 need to open the corresponding single-grid filter aeration pipe c and the single-grid filter water inlet pipe a, and need to close the corresponding single-grid filter return pipe b.
When only the denitrification operation mode is used, the operated aeration biological filter grids 3 need to open the corresponding single-grid filter water inlet pipe a and the corresponding single-grid filter backflow pipe b, and need to close the corresponding single-grid filter aeration pipe c.
When the simultaneous nitrification and denitrification operation mode is adopted, part of the aeration biological filter grids 3 are adjusted according to the mode of the nitrification-only operation mode. The rest of the aeration biological filter grids 3 are adjusted according to the denitrification operation mode only.
The embodiment of the invention also provides a control method of the biological aerated filter capable of realizing multi-mode operation, which is used for controlling the biological aerated filter capable of realizing multi-mode operation to operate according to a nitrification operation mode, a denitrification operation mode and a nitrification and denitrification simultaneous operation mode and comprises the following steps:
controlling to open a single-lattice filter water inlet pipe a and a single-lattice filter aeration pipe c which are correspondingly connected with each biological aerated filter lattice 3 of the biological aerated filter, and controlling to close a single-lattice filter return pipe b which is correspondingly connected, so that the biological aerated filter operates according to a nitrification operation mode;
controlling to open a single-lattice filter water inlet pipe a and a single-lattice filter return pipe b which are correspondingly connected with each biological aerated filter lattice 3 of the biological aerated filter, and controlling to close a single-lattice filter aeration pipe c which is correspondingly connected, so that the biological aerated filter operates according to a denitrification operation mode;
and controlling part of the aeration biological filter grids 3 of the aeration biological filter to operate according to a nitrification operation mode, and controlling the rest of the aeration biological filter grids 3 to operate according to a denitrification operation mode.
The biological aerated filter capable of operating in multiple modes provided by the embodiment of the invention at least has the following advantages:
(1) the biological aerated filter can be used in the advanced treatment section of a sewage treatment plant, is influenced by the fluctuation of the water quality of inlet water and the effect of secondary biochemical treatment, and has the advantages that the water quality of inlet water is different when the monomer of the biological aerated filter enters the biological aerated filter, the water quality standards of outlet water are the same, the types and the concentrations of pollutants to be removed are different, and different functional requirements can be realized by flexible adjustment of an operation mode.
(2) The biological aerated filter has the advantages of improved water inflow impact load resistance, improved operation stability and relieved secondary treatment operation pressure.
(3) Compared with the existing nitrification filter and denitrification filter series combination mode, all the aeration biological filter grids are on the same height, and the head loss is reduced. Meanwhile, each unit is more compact in arrangement, and the occupied area is reduced.
The embodiments of the present invention are described in further detail below.
As shown in fig. 1, an embodiment of the present invention provides a biological aerated filter capable of multi-mode operation, including: the system comprises a water inlet channel 1, a water outlet channel 5, a water distribution well 2, a back flush drainage channel 4, an aeration biological filter grid 3, a pipe gallery 6 and a glass skylight 7; wherein the content of the first and second substances,
the number of the aeration biological filter lattices 3 is even, the aeration biological filter lattices are symmetrically arranged in two rows, fig. 1 shows aeration biological filter lattices with the number of 6, and the description is given by taking fig. 1 as an example.
The number of the water inlet channels 1 is 2, and the water inlet channels are arranged on the inner side of each aeration biological filter grid 3;
the distribution wells 2 and the glass skylights 7 are arranged between the water inlet channels 1, each aeration biological filter lattice 3 on each side is correspondingly provided with one distribution well 2, the distribution wells 2 corresponding to the symmetrically arranged aeration biological filter lattices 3 are arranged side by side, and every two side by side distribution wells 2 and one glass skylight 7 are alternately arranged in a row;
the distribution well 2 is divided into two grids by partition walls, namely a water inlet distribution well 21 and a water return distribution well 22, and the direction of the partition walls is parallel to the water inlet channel 1;
the pipe gallery 6 is arranged under the backwashing drainage channel 4, the water outlet channel 5, the water distribution well 2 and the glass skylight 7 of the single-lattice filter and is positioned between the aeration biological filter lattices 3 at the two sides;
the regulating weir plates 8 are arranged on the tops of the partition walls on the two sides of the water inlet and distribution well 21 of each distribution well 2;
the water outlet channel 5 is arranged right below the water inlet channel 1 and has the same width in the plane direction;
as shown in fig. 2, the water to be treated overflows from the water inlet channel 1 to the water inlet distribution well 21 through the regulating weir plate 8; the return water enters a return water distribution well 22 through a return pipe b of the single-cell filter, and overflows to a water inlet distribution well 21 through an adjusting weir plate 8; the water to be treated and the return water are mixed in the water inlet distribution well 21 on the left side; the return water can adopt the total outlet water of the biological aerated filter or the total outlet water of a water plant, and the water inlet distribution well 21 is connected with the biological aerated filter lattice 3 on the same side through a water inlet pipe a of the single-lattice filter;
each aeration biological filter grid 3 is an upward flow type biological filter;
the top of the partition wall of each aeration biological filter lattice 3 and the matched backwashing drainage channel 4 is provided with a backwashing drainage regulating weir plate, and the top of the aeration biological filter lattice 3 is communicated with the inside of the backwashing drainage channel 4 through the backwashing drainage regulating weir plate 41;
the top of the separation wall between the backwashing drainage channel 4 and the adjacent water outlet channel 5 is provided with a water outlet adjusting weir plate, the height of the water outlet adjusting weir plate 51 is higher than that of the backwashing drainage adjusting weir plate 41, the water level in the aeration biological filter lattice 3 is increased when water is normally discharged, the water level in the aeration biological filter lattice 3 is decreased when water is discharged in backwashing and is lower than that of the water outlet adjusting weir plate 51, and the top of the aeration biological filter lattice 3 is communicated with the water outlet channel 5 through the backwashing drainage adjusting weir plate 41 and the water outlet adjusting weir plate 51 in sequence. Therefore, the back-flushing water outlet or the water outlet of normal treatment can be realized by adjusting the height of the water level in the aeration biological filter grid 3.
As shown in figure 3, the single-cell filter inlet pipe a and the single-cell filter return pipe b are respectively arranged at the bottom of different cells (namely a water inlet distribution well 21 and a water return distribution well 22) of the same distribution well 2.
There are three adjustable modes of operation: (1) a nitrification-only mode of operation; (2) a denitrification only mode of operation; (3) a simultaneous nitrification and denitrification operation mode; wherein the content of the first and second substances,
(1) the nitrification-only operating mode is as follows:
the number of the operating grids 3 of the biological aerated filter is adjustable, for example, the biological aerated filter shown in fig. 1 is adjustable according to 0-6 grids, the operating biological aerated filter grids 3 open the corresponding single-grid filter aeration pipes c and the corresponding single-grid filter water inlet pipes a, and close the corresponding single-grid filter return pipes b.
(2) The denitrification only mode of operation is:
the number of the operating grids 3 of the biological aerated filter is adjustable, for example, the biological aerated filter shown in fig. 1 is 0-6 grids, the operating biological aerated filter grids 3 open the corresponding single-grid filter water inlet pipe a and the corresponding single-grid filter return pipe b, the corresponding single-grid filter aeration pipe c needs to be closed, and a carbon source is supplemented if necessary and added in the single-grid filter return pipe b.
(3) And (3) simultaneous nitrification and denitrification operation mode:
the number of the grids in the 3 parts of the aeration biological filter grid runs according to a nitrification mode, and the rest runs according to a denitrification mode; the aeration biological filter grid 3 operating according to the nitrification mode opens the corresponding single-grid filter aeration pipe c and the single-grid filter water inlet pipe a, and closes the corresponding single-grid filter return pipe b; the aeration biological filter grid 3 operating according to the denitrification mode opens the corresponding single-grid filter water inlet pipe a and the corresponding single-grid filter backflow pipe b and closes the corresponding single-grid filter aeration pipe c; and (3) supplementing a carbon source when necessary, wherein the carbon source is added into the return pipe b of the single-lattice filter.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A biological aerated filter capable of realizing multi-mode operation is characterized by comprising:
the aeration biological filter lattices (3) are respectively arranged on two sides of the pipe gallery (6), the aeration biological filter lattices (3) on the two sides are arranged in pairs in an opposite mode, and the total number of the aeration biological filter lattices (3) is even;
the aeration biological filter grids (3) on each side are provided with a back flush drainage channel (4), a water outlet channel (5) and a water inlet channel (1) which are matched;
the back-flushing drainage channel (4) and the water outlet channel (5) are arranged above the pipe gallery (6) side by side, the back-flushing drainage channel (4) is positioned at one side of the aeration biological filter grid (3) at the same side, and the water inlet channel (1) is positioned above the water outlet channel (5);
the top of the partition wall of each aeration biological filter lattice (3) and the matched back-flushing drainage channel (4) is provided with a back-flushing drainage regulating weir plate, and the top of the aeration biological filter lattice (3) is communicated with the back-flushing drainage channel (4) through the back-flushing drainage regulating weir plate (41);
the top of a partition wall between the backwashing drainage channel (4) and the adjacent water outlet channel (5) is provided with a water outlet adjusting weir plate (41), the height of the water outlet adjusting weir plate (51) is higher than that of the backwashing drainage adjusting weir plate (41), and the top of the aeration biological filter lattice (3) is communicated with the water outlet channel (5) through the backwashing drainage adjusting weir plate (41) and the water outlet adjusting weir plate (51) in sequence;
each aeration biological filter lattice (3) is provided with a matched water distribution well (2), the water distribution well (2) is arranged between a water outlet channel (5) and a water inlet channel (1) at two sides, the interior of each water distribution well (2) is divided into a water inlet distribution well (21) and a water return distribution well (22) through partition walls, the water inlet distribution well (21) is connected with the bottom of the aeration biological filter lattice (3) at the same side of the water inlet distribution well (21) through a single-lattice filter water inlet pipe (a), and the water return distribution well (22) is connected with a total return water pipeline through a single-lattice filter return pipe (b);
a single-pore membrane aerator is arranged in each aeration biological filter lattice (3) and is connected with a single-lattice filter pool aeration pipe (c);
the bottom of each aeration biological filter lattice (3) is respectively connected with a single-lattice filter backwashing water inlet pipe (d), a single-lattice filter backwashing air inlet pipe (e) and a single-lattice filter emptying pipe (g), wherein the other end of the single-lattice filter backwashing water inlet pipe (d) is connected with a backwashing water pump, the other end of the single-lattice filter backwashing air inlet pipe (e) is connected with a backwashing fan, and the single-lattice filter emptying pipe (g) is connected with a plant area emptying header pipe through a header pipe;
glass skylights (7) are arranged in the space between the adjacent distributing wells.
2. A biological aerated filter capable of realizing multi-mode operation according to claim 1, wherein the biological aerated filter lattices (3) on both sides of the pipe gallery (6) are multiple, and the biological aerated filter lattices (3) on both sides are symmetrically arranged in pairs;
two distributing wells (2) corresponding to the aeration biological filter lattices (3) with opposite two sides are arranged side by side;
a glass skylight (7) is arranged between two groups of water distribution wells (2) which are adjacent at intervals, the water distribution wells (2) and the glass skylight (7) are alternately arranged right above the pipe gallery (6) and clamped between the water inlet channel (1) and the water outlet channel (5) which are symmetrically arranged at two sides.
3. A biological aerated filter capable of multi-mode operation according to claim 2, wherein there are at least two biological aerated filter cells (3) on each side.
4. A biological aerated filter capable of realizing multi-mode operation according to claim 2 or 3, wherein the biological aerated filter grids (3) have the same height and are all upward flow type biological filters with square filter bodies.
5. A biological aerated filter capable of realizing multi-mode operation according to any one of claims 1 to 3, wherein the water outlet channel (5) is arranged right below the corresponding water inlet channel (1), and the width of the water outlet channel (5) is the same as that of the water inlet channel (1) right above the water outlet channel.
6. A biological aerated filter capable of realizing multi-mode operation according to any one of claims 1 to 3, wherein the top of the partition between the water inlet and distribution wells (21) and the water return and distribution well (22) of each distribution well (2) is provided with a regulating weir plate;
the water inlet channel (1) and a matched water distribution well of the aeration biological filter grids (3) at the same side are arranged in a common wall mode, and the top of the common wall is provided with an adjusting weir plate.
7. An aeration biological filter capable of realizing multi-mode operation according to any one of claims 1 to 3, wherein the single-lattice filter water inlet pipe (a), the single-lattice filter return pipe (b), the single-lattice filter aeration pipe (c), the single-lattice filter backwashing water inlet pipe (d), the single-lattice filter backwashing air inlet pipe (e), the single-lattice filter water outlet pipe (f) and the single-lattice filter emptying pipe (g) are all provided with electric control valves;
further comprising: and the control device is electrically connected with the electric control valves on the pipelines respectively and can control the opening or closing of the electric control valves according to a preset nitrification operation mode, a denitrification operation mode and a nitrification and denitrification simultaneous operation mode.
8. A method for controlling a biological aerated filter capable of realizing multi-mode operation, which is used for controlling the biological aerated filter capable of realizing multi-mode operation according to any one of claims 1 to 7 to operate in a nitrification operation mode, a denitrification operation mode and a nitrification and denitrification simultaneous operation mode, and comprises the following steps:
controlling to open a single-lattice filter water inlet pipe (a) and a single-lattice filter aeration pipe (c) which are correspondingly connected with each biological aerated filter lattice (3) of the biological aerated filter, and controlling to close a single-lattice filter return pipe (b) which is correspondingly connected, so that the biological aerated filter operates according to a nitrification operation mode;
controlling to open a single-lattice filter water inlet pipe (a) and a single-lattice filter return pipe (b) which are correspondingly connected with each biological aerated filter lattice (3) of the biological aerated filter, and controlling to close a single-lattice filter aeration pipe (c) which is correspondingly connected, so that the biological aerated filter operates according to a denitrification operation mode;
and controlling part of the aeration biological filter lattices (3) of the aeration biological filter to operate according to a nitrification operation mode, and controlling the rest of the aeration biological filter lattices (3) to operate according to a denitrification operation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110619123.3A CN113354086A (en) | 2021-06-03 | 2021-06-03 | Biological aerated filter capable of realizing multi-mode operation and control method thereof |
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| CN202110619123.3A CN113354086A (en) | 2021-06-03 | 2021-06-03 | Biological aerated filter capable of realizing multi-mode operation and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117872991A (en) * | 2024-01-16 | 2024-04-12 | 安徽华骐环保科技股份有限公司 | Automatic operation control method for aeration biological filter water treatment process |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117872991A (en) * | 2024-01-16 | 2024-04-12 | 安徽华骐环保科技股份有限公司 | Automatic operation control method for aeration biological filter water treatment process |
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