CN210945229U

CN210945229U - Sewage treatment biological filter

Info

Publication number: CN210945229U
Application number: CN201920910299.2U
Authority: CN
Inventors: 师存恩; 习日孟呼; 师旷玺
Original assignee: Inner Mongolian Qiboairui Environmental Protection And Technology Co ltd
Current assignee: Hangzhou LiNbO Environmental Protection Technology Co., Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-07-07
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a sewage treatment biofilter, including the cell body, the fixed grid that is equipped with of level in the cell body, be equipped with first filter screen at the last fixed surface of grid, laid mixed precoat in the cell body of first filter screen top is inside, laid the second filter screen at the top of mixed precoat, be fixed with pulsed multiple spot sewage water-locator at the top of cell body. The utility model has the advantages that when the temperature was lower in winter in the north of china, hydrolysis acidification tank before the biological filter was slow to the hydrolysis of sewage, and the great organic matter of thorough hydrolysis acidification was intercepted on the second filter screen, has reduced the processing load of mixing the filter material to sewage, also can prevent that relatively great debris from getting into the cell body and causing mixing the filter material to block up.

Description

Sewage treatment biological filter

The technical field is as follows:

the utility model relates to a sewage treatment field, concretely relates to sewage treatment biofilter.

Background art:

the biological filter is a sewage treatment technology developed by an original intermittent sand filter and a contact filter on the basis of the self-purification of soil on the basis of the practice of sewage irrigation. Before the sewage is treated by the biological filter, the sewage is hydrolyzed and acidified by the hydrolysis acidification tank and then enters the water collecting tank, and the sewage in the water collecting tank enters the biological filter for decomposition treatment.

At present, the biological filter technology is mostly carried out by adopting a mode of aeration at the bottom of the filter or dripping at the top of the filter, and the two modes are mostly applied to the domestic sewage treatment projects of villages and small towns, and have defects of different degrees. The following were used: in northern winter areas of China, because the temperature is low, the treatment process of the hydrolysis acidification tank is slow, large organic matters which are not completely hydrolyzed and acidified enter the biological filter through the water collecting tank, and the large organic matters are difficult to completely decompose in the biological filter, so that the treatment load of filter materials is increased, the filter materials in the biological filter are blocked, the integral treatment effect of sewage is influenced, and the effluent quality of the biological filter is reduced; the aeration biological filter tank generally adopts a tank bottom aeration mode to carry out oxygenation, and an aeration device is easy to break down; the trickling-type biological filter usually adopts a continuous trickling-type manner at the top of the filter to fill sewage, the phenomenon of uneven water distribution caused by blockage of water distribution holes can often occur, and filter material gaps are easily blocked by bacterial membranes and impurities, so that the treatment effect is poor.

The utility model has the following contents:

an object of the utility model is to provide a reduce sewage treatment biological filter of biological filter processing burden.

The utility model discloses by following technical scheme implement: a sewage treatment biofilter comprises a pool body, wherein a grid is horizontally and fixedly arranged in the pool body, a first filter screen is fixedly arranged on the upper surface of the grid, a mixed filter material layer is paved inside the pool body above the first filter screen, a second filter screen is paved at the top of the mixed filter material layer, and an impulse type multi-point sewage distributor is fixedly arranged at the top of the pool body.

Furthermore, the mixed filter material layer comprises vermiculite, volcanic rock and porous dephosphorizing filter materials.

Furthermore, the pulse type multipoint sewage distributor comprises a water inlet pump station and a plurality of main pipes which are arranged on the same horizontal plane in parallel, a plurality of water distribution pipes which are arranged in parallel are communicated between every two adjacent main pipes, a plurality of water distribution holes are formed in the bottoms of the water distribution pipes, and a water outlet of the water inlet pump station is communicated with any one main pipe through a water inlet pipe; the water inlet pump station comprises a timing device, a first water inlet pump and a second water inlet pump, the water outlet of the first water inlet pump and the water outlet of the second water inlet pump are respectively communicated with the water inlet end of the water inlet pipe, and the timing device is respectively electrically connected with the first water inlet pump and the second water inlet pump.

Furthermore, a plurality of support columns are vertically fixed at the inner bottom of the pool body, and the grating is fixed at the tops of the support columns.

Further, the grid below evenly communicate on the pool wall of cell body has two at least drain pipes the drain pipe facial make-up is equipped with the drain valve the cell body bottom intercommunication has the blow off pipe facial make-up is equipped with the blowoff valve the second filter screen top the intercommunication has the overflow pipe on the pool wall of cell body.

Furthermore, the water inlet of the water discharge pipe is arranged in a downward bending mode.

The utility model has the advantages that: energy saving, less investment, stable operation and convenient operation; the pulse type multi-point sewage water distributor adopts a high-power water inlet pump to lift sewage, water is distributed in a multi-point spraying mode to avoid blocking of water distribution holes, the sewage is uniformly sprayed onto the second filter screen, the second filter screen can be prevented from being blocked due to continuous spraying and cleaning of the second filter screen, and the sewage can easily enter the mixed filter material layer through the second filter screen; meanwhile, when the temperature is lower in winter in northern China, the hydrolysis acidification tank in front of the biological filter tank slowly hydrolyzes the sewage, and larger organic matters which are not completely hydrolyzed and acidified are intercepted on the second filter screen, so that the treatment load of the mixed filter material layer on the sewage is reduced, and the blockage among the mixed filter materials caused by relatively larger impurities entering the tank body can be prevented; the second filter screen can also effectively reduce the scouring of the mixed filter material at the top in the spraying process of the pulse type multi-point sewage distributor, and is favorable for the attachment and growth of microorganisms in the mixed filter material at the top.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a structural schematic diagram of a pulse type multi-point sewage distributor.

In the figure: the device comprises a tank body 1, a support column 2, a grid 3, a first filter screen 4, a mixed filter material layer 5, a second filter screen 6, a pulse type multi-point sewage distributor 7, a drain pipe 8, a drain valve 9, a drain pipe 10, a drain valve 11, an overflow pipe 12, a main pipe 13, a water distributor 14, a water distribution hole 15, a water inlet pipe 16, a timing device 17, a first water inlet pump 18 and a second water inlet pump 19.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, a biological sewage treatment filter comprises a tank body 1, a grid 3 is horizontally and fixedly arranged in the tank body 1, in this embodiment, the grid 3 is a glass fiber reinforced plastic grid, the glass fiber reinforced plastic grid can support the weight of a mixed filter material layer 5 and can ensure the circulation of sediments and suspended matters in sewage, a plurality of support columns 2 are vertically fixed at the inner bottom of the tank body 1, the grid 3 is fixed at the tops of the support columns 2, the grid 3 divides the tank body 1 into an upper area and a lower area, the upper part is a sewage treatment area, and the lower part is a sedimentation area; a first filter screen 4 is fixedly arranged on the upper surface of the grating 3, the first filter screen 4 can prevent the mixed materials from entering a precipitation area, a mixed filter material layer 5 is laid in the tank body 1 above the first filter screen 4, the mixed filter material layer 5 comprises vermiculite, volcanic rock and porous dephosphorizing filter materials, the porous dephosphorizing filter materials are formed by mixing calcium carbonate powder and coal ash and have good dephosphorizing effect, the vermiculite and the volcanic rock have the functions of sterilization, pH value balance and ammonia nitrogen adsorption, the surface of the mixed filter materials is in complete contact with sewage, a large number of microorganisms are attached to the surface of the mixed filter material, aerobic microorganisms, facultative microorganisms and anaerobic microorganisms are arranged in the tank body 1 from top to bottom according to different time of contacting with oxygen in the tank body 1, the microorganisms can well adsorb organic matters in sewage and decompose the organic matters, and the mixed filter material layer 5 obviously improves the comprehensive performance of the tank body 1.

A second filter screen 6 is laid on the top of the mixed filter material layer 5, a pulse type multi-point sewage distributor 7 is fixed on the top of the tank body 1, the pulse type multi-point sewage distributor 7 adopts a high-power water inlet pump to lift sewage, water outlet adopts a multi-point injection mode to distribute water, and the sewage is injected onto the second filter screen 6. The second filter screen 6 is continuously sprayed and cleaned, so that the second filter screen 6 can be prevented from being blocked, and sewage can easily enter the mixed filter material layer 5 through the second filter screen 6; meanwhile, when the temperature is lower in winter in northern China, the hydrolysis acidification tank in front of the biological filter slowly hydrolyzes the sewage, and larger organic matters which are not completely hydrolyzed and acidified are intercepted on the second filter screen 6, so that the treatment load of the mixed filter material layer 5 on the sewage is reduced, and the mixed filter material layer 5 can be prevented from being blocked because the larger organic matters enter the tank body 1; the arrangement of the second filter screen 6 can also effectively reduce the scouring of the spraying process of the pulse type multi-point sewage distributor 7 on the top of the mixed filter material layer 5, and is beneficial to the attachment and growth of microorganisms on the top of the mixed filter material layer 5.

The pulse type multi-point sewage water distributor 7 comprises a water inlet pump station and a plurality of main pipes 13 which are arranged on the same horizontal plane in parallel, a plurality of water distribution pipes 14 which are arranged in parallel are communicated between every two adjacent main pipes 13, a plurality of water distribution holes 15 are arranged at the bottoms of the water distribution pipes 14, and the water outlet of the water inlet pump station is communicated with any one main pipe 13 through a water inlet pipe 16; the pump station of intaking includes timing device 17, first intake pump 18 and second intake pump 19, and the delivery port of first intake pump 18 and the delivery port of second intake pump 19 communicate with the end of intaking of inlet tube 16 respectively, and timing device 17 is connected with first intake pump 18 and second intake pump 19 electricity respectively for control first intake pump 18 or the alternative intermittent type operation of second intake pump 19, timing device 17 chooses for use the model to be: a microcomputer time controlled switch of KG 316T.

At least two drain pipes 8 are uniformly communicated with the wall of the pool body 1 below the grating 3, the water inlets of the drain pipes 8 are arranged in a downward bending way, the drain pipes 8 with the downward bending water inlets of the drain pipes 8 can discharge the treated sewage to the maximum extent without contacting with sediment at the bottom, so that the sediment is prevented from being discharged from the drain pipes 8, when the sewage amount in the pool body 1 is lower than the water outlets of the drain pipes 8, the sewage can automatically stop discharging, so that suspended matters on the surface of the sewage can be prevented from being discharged from the drain pipes 8, the sewage treated by the pool body 1 enters a corresponding subsequent water purification system through the drain pipes 8, drain valves 9 are arranged on the drain pipes 8, the drain valves 9 are always in an open state, the water discharge amount of the drain pipes 8 can be controlled by adjusting the drain valves 9, but the water discharge amount of the drain pipes 8 is smaller than the water discharge amount of the pulse-type sewage, there is blow off pipe 10 in 1 bottom intercommunication of cell body, the precipitate and the suspended solid of 1 bottom of cell body pass through blow off pipe 10 and get into sludge treatment system, it is equipped with blowoff valve 11 to adorn on blow off pipe 10, the blow off capacity through 11 control blow off pipes 10 of blowoff valve, blowoff valve 11 is according to 1 bottom precipitate of cell body, the volume of suspended solid, regularly open with the precipitate, the suspended solid is discharged, the intercommunication has overflow pipe 12 on the pool wall of cell body 1 of second filter screen 6 top, the great organic matter through 6 interceptions of second filter screen is regularly discharged through overflow pipe 12.

The specific operation process of the embodiment is as follows:

1. the timing device 17 controls the first water inlet pump 18 or the second water inlet pump 19 to start, the pulse type multi-point sewage water distributor 7 distributes water uniformly, in the process of distributing water, the sewage entering the pool body 1 discharges air between the mixed filter material layers 5, along with the increase of the water level, after the pool body 1 is filled with the sewage, the timing device 17 controls the first water inlet pump 18 or the second water inlet pump 19 to close, and the pulse type multi-point sewage water distributor 7 stops distributing water;

2. the water yield of the drain valve 9 is adjusted, sewage in the tank body 1 is continuously drained through the drain pipe 8, when the sewage flows out, the water level in the tank body 1 is continuously reduced, the gap between the mixed filter material layers 5 is refilled with fresh air brought in after the sewage flows out, so that an aerobic environment is formed on the surfaces of the mixed filter materials, because the time length of the mixed filter materials with different heights in the tank body 1 contacting oxygen is different, the time of the mixed filter material closest to the top contacting air is longest, the time of the mixed filter material layers 5 contacting air from top to bottom is gradually shortened, and microorganisms attached to the mixed filter materials are subjected to gradient steps from aerobic to anoxic from the top to the bottom of the tank body 1 according to different requirements on oxygen, the tank body 1 has a composite function of aerobic, facultative and anoxic decomposition;

3. after the sewage is drained completely, the blow-down valve 11 is opened periodically according to the amount of sediments at the bottom of the tank, the sediments and suspended matters at the bottom of the tank are discharged outwards, the blow-down valve 11 is closed, and the tank body 1 is in an emptying state for a certain time, so that sufficient oxygen is provided for aerobic microorganisms and facultative microorganisms attached to the mixed filter material layer 5 to ensure the survival of the microorganisms, and the normal operation of the next circulation is ensured;

4. the next cycle is performed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment biofilter comprises a pool body and is characterized in that a grid is horizontally and fixedly arranged in the pool body, a first filter screen is fixedly arranged on the upper surface of the grid, a mixed filter material layer is paved inside the pool body above the first filter screen, a second filter screen is paved at the top of the mixed filter material layer, and a pulse type multi-point sewage distributor is fixed at the top of the pool body.

2. The biofilter for sewage treatment according to claim 1, wherein said mixed filter layer comprises vermiculite, volcanic rock and porous dephosphorized filter material.

3. The biofilter for sewage treatment according to claim 1, wherein the pulse type multi-point sewage distributor comprises a water inlet pump station and a plurality of main pipes arranged in parallel on the same horizontal plane, a plurality of water distribution pipes arranged in parallel are communicated between two adjacent main pipes, a plurality of water distribution holes are arranged at the bottoms of the water distribution pipes, and a water outlet of the water inlet pump station is communicated with any one main pipe through a water inlet pipe; the water inlet pump station comprises a timing device, a first water inlet pump and a second water inlet pump, the water outlet of the first water inlet pump and the water outlet of the second water inlet pump are respectively communicated with the water inlet end of the water inlet pipe, and the timing device is respectively electrically connected with the first water inlet pump and the second water inlet pump.

4. The biofilter for sewage treatment according to claim 1, wherein a plurality of support columns are vertically fixed at the inner bottom of the pool body, and the grating is fixed at the tops of the support columns.

5. The biological sewage treatment filter according to any one of claims 1 to 4, wherein at least two drainage pipes are uniformly communicated with the wall of the tank body below the grating, a drainage valve is arranged on the drainage pipe, a drainage pipe is communicated with the bottom of the tank body, a drainage valve is arranged on the drainage pipe, and an overflow pipe is communicated with the wall of the tank body above the second filter screen.

6. The biofilter according to claim 5, wherein the water inlet of said drain pipe is bent downward.