CN114956488B - Sewage treatment system and sewage treatment method - Google Patents
Sewage treatment system and sewage treatment method Download PDFInfo
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- CN114956488B CN114956488B CN202210783474.2A CN202210783474A CN114956488B CN 114956488 B CN114956488 B CN 114956488B CN 202210783474 A CN202210783474 A CN 202210783474A CN 114956488 B CN114956488 B CN 114956488B
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- 239000010865 sewage Substances 0.000 title claims abstract description 365
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 193
- 238000001914 filtration Methods 0.000 claims abstract description 39
- 230000005484 gravity Effects 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 3
- 238000012216 screening Methods 0.000 claims description 75
- 239000010802 sludge Substances 0.000 claims description 34
- 238000007790 scraping Methods 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 238000013517 stratification Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 83
- 239000007857 degradation product Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 21
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 9
- 238000006731 degradation reaction Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 208000034699 Vitreous floaters Diseases 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 235000019580 granularity Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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- 238000001556 precipitation Methods 0.000 description 1
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- 239000013589 supplement Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
-
- 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
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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
-
- 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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides a sewage treatment system which comprises a sewage layering system and a sewage purification system for purifying sewage, wherein the sewage purification system comprises a water purification layer, the water purification layer is sequentially arranged along the gravity direction, different water purification layers sequentially arranged along the gravity direction are respectively filled with filter particles with the particle size from large to small, and the layered sewage is in operable communication with the water purification layer so as to realize the filtration and purification of the sewage layer by the filter particles. The invention also discloses a sewage treatment method which can quickly realize layering and purifying treatment of sewage. According to the invention, different filtering strategies can be selected in a targeted manner according to different contents of degradation products in the sewage, when the contents of degradation products in the sewage are smaller, the sewage can not be repeatedly filtered and purified, so that the water purification pressure of a sewage purification system caused by repeated filtration of the sewage is avoided, when the contents of degradation products in the sewage are larger, the sewage is filtered and purified through a plurality of layers of water purification layers, and the degree of sewage purification is improved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system and a sewage treatment method.
Background
The sewage treatment system is a general term for a whole of various structures which are combined in a certain order according to functions thereof to finish sewage treatment together.
In the existing sewage technology, multistage filtration and sedimentation are often needed, and then artificial wetland is introduced to improve the sewage purification efficiency, or different types of wetlands are used in series by adopting a wetland multistage parallel technology, so that the aim of treating domestic sewage is fulfilled.
However, after sewage is degraded, degradation particles in the sewage can be settled under the action of self gravity, so that different sewage layers are formed, different sewage layers have different densities, in other words, the molecular degradation amount in different sewage layers is different, in the existing sewage treatment process, the sewage purification systems with different filtration purities are not independently arranged for different sewage layers, and therefore the purification pressure of the sewage purification systems is increased, and the water purification efficiency of the sewage purification systems is reduced.
Disclosure of Invention
The invention aims to provide a sewage treatment system and a sewage treatment method, and aims to solve the problem that in the prior art, the sewage treatment has a higher purification pressure of a sewage purification system, so that the water purification efficiency of the sewage purification system is lower.
In order to achieve the above object, the present invention provides a sewage treatment system, wherein the sewage treatment system comprises a sewage layering system for layering sewage and a sewage purifying system for purifying the layered sewage, the sewage purifying system comprises a water purifying layer, the water purifying layers are sequentially arranged along the gravity direction, different water purifying layers sequentially arranged along the gravity direction are respectively filled with filter particles with particle sizes from large to small, and the layered sewage is in operable communication with the water purifying layer so as to realize the filtration and purification of the sewage layer by the filter particles.
The sewage treatment system comprises a sewage tank and a partition plate arranged in the sewage tank, wherein the partition plate divides the interior of the sewage tank into at least two layered cavities, the sewage purification system comprises water purification layers with the same number as the layered cavities, in every two adjacent water purification layers, the bottom of one water purification layer positioned above is communicated with the top of one water purification layer positioned below, and the bottom of the water purification layer positioned at the bottommost is provided with a water outlet.
The sewage treatment system is characterized in that a supporting framework for supporting the filtering particles is arranged at the water outlet.
The sewage treatment system is characterized in that the sewage tank is provided with the water outlet pipelines with the same number as that of the layered cavities, and each water outlet pipeline is used for discharging sewage corresponding to one layered cavity and injecting the sewage into the water purification layer.
The sewage treatment system comprises a sewage tank, a sewage layering system, a sewage tank, a sewage mixing device, a vibrating screening device, a layering device and a grid, wherein the sewage layering system further comprises the vibrating screening device and the layering device, the vibrating screening device is arranged in the sewage tank and used for mixing sewage flowing into the sewage tank, the layering device is arranged in the water tank and located below the vibrating screening device, the layering device comprises a separation plate and the grid, the grid is arranged on the separation plate, a biological film used for catalyzing sewage reaction is further arranged on the grid, the sewage mixed by the vibrating screening device is settled along the gravity direction and is contacted with the biological film on the grid, and the grid is further operable to increase the movement of the contact area of the sewage and the biological film.
The sewage treatment system comprises a vibrating plate and a screening plate, wherein the vibrating plate and the screening plate are oppositely arranged, a protruding structure is arranged on one surface of the vibrating plate, a water leakage hole is formed on one surface of the screening plate, which faces the vibrating plate, sewage passes through the vibrating plate and/or the screening plate after being mixed, and the sewage passes through the water leakage hole to be settled along the gravity direction and to be in contact with the biological film on the grid below the screening plate.
The sewage treatment system comprises a sewage layered system, wherein the sewage layered system further comprises a water filtering tank, a water conveying pipeline for inputting sewage is arranged on the sewage tank, the water filtering tank is arranged at the water inlet end of the water conveying pipeline, and the water outlet end of the water conveying pipeline is communicated with the water passing cavity.
The sewage treatment system comprises a sewage tank, wherein the sewage layering system further comprises a sludge scraping device, the sludge scraping device is arranged in the sewage tank and located at the bottom of the sewage tank, a sludge discharge port is formed in the sewage tank, and the sludge scraping device is used for discharging sludge in the sewage tank through the sludge discharge port.
The sewage treatment method is applied to the sewage treatment system and comprises the following steps:
injecting sewage into a water pipeline, filtering the sewage by the water filtering tank, and then entering the water passing cavity;
the screening plate and/or the vibrating plate are/is moved, and after the sewage is fully mixed, the sewage is settled through the water leakage holes;
the grating is moved, so that the surface of the grating and the gravity direction form a first preset angle alpha, and the contact area between the sewage and the biological film on the grating is increased;
continuously inputting the sewage into the water conveying pipeline until the sewage in the sewage tank reaches a volume threshold;
stopping injecting the sewage, and inputting air with a preset volume into the sewage tank through the water conveying pipeline;
the screening plate and the vibrating plate are static, the grid or the separating plate is rotated along a second preset angle beta at intervals of a first preset time t1, and the second preset time t2 is continued;
after the sewage is kept stand for a third preset time t3, the grille is folded;
sequentially opening the water outlet pipelines along the gravity direction to enable the layered sewage to flow into the water purifying layer;
the sewage is filtered by the water purifying layer and then discharged through the water outlet of the water purifying layer positioned at the bottommost end;
and discharging the sludge in the sewage tank through the mud scraping plate at intervals.
According to the sewage treatment method, when the water outlet pipelines are sequentially opened along the gravity direction, the water outlet pipelines adjacent to and above the water outlet pipelines need to be ensured to completely drain the sewage corresponding to the layered cavity, and the water outlet pipelines can be opened.
Compared with the prior art, the invention has the beneficial effects that:
the sewage purification system is provided with different water purification layers, the inside of each water purification layer is provided with the filter particles with different granularities, different filtering strategies can be selected in a targeted manner according to different contents of degradation products in the sewage, when the contents of the degradation products in the sewage are smaller, the sewage can not be repeatedly filtered and purified, so that the water purification pressure of the sewage purification system caused by repeated filtration of the sewage is avoided, when the contents of the degradation products in the sewage are more, the sewage is filtered and purified through the multi-layer water purification layers, and the degree of sewage purification is improved.
Drawings
FIG. 1 is a schematic overall construction of the present invention;
FIG. 2 is a schematic overall profile of the vibratory screening device of FIG. 1;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a block diagram of the layered assembly of FIG. 1;
FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 4;
FIG. 6 is a schematic view of the mud scraping apparatus of FIG. 1;
FIG. 7 is a cross-sectional view taken along the direction A-A in FIG. 6;
FIG. 8 is an enlarged view of FIG. 1 at C;
FIG. 9 is a schematic perspective view of a sewage treatment system
Fig. 10 is a front view of fig. 9;
fig. 11 is a side view of fig. 9.
In the figure: 1. a sewage tank; 11. a layering chamber; 12. a mud storage cavity; 13. a mud discharging port;
2. a vibratory screening device; 21. a vibration plate; 211. a bump structure; 22. a screening plate; 221. a water leakage hole; 23. a first side plate; 231. a first clamping groove; 24. a first end plate; 241. a second clamping groove; 242. a second water injection hole;
3. a layering device; 31. a second side plate; 32. a second end plate; 33. a grille; 34. rubber; 35. a biological membrane; 36. a rotating shaft;
41. a water pipe; 42. a water outlet pipe; 5. a water filtering tank;
6. a mud scraping device; 61. a mud scraping plate; 62. a pull rod; 63. pulley wheel
71. A first sealing plug; 72. a second sealing plug; 8. a valve body; 9. a sewage purification system; 91. a water purification layer; 92. filtering the particles; 93. a water outlet; 10. a sewage layering system.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 9 to 11, the sewage treatment system of the present invention comprises a sewage layering system 10 and a sewage purification system 9, the sewage to be treated is first poured into the sewage layering system 10 for standing layering, the layered sewage is input into the sewage purification system 9 through a water pipe 41, and is filtered and purified through filter particles 92 in the sewage purification system 9, and finally the filtered and purified sewage is discharged through a water outlet 93 in the sewage purification system 9.
Further, as shown in fig. 1, 4 and 5, the sewage layering system of the present invention includes a sewage tank 1, a vibration screening device 2 and a layering device 3, wherein the sewage tank 1 is used for temporarily storing sewage to be subjected to standing layering filtration, the vibration screening device 2 is disposed inside the sewage tank 1, sewage injected into the sewage tank 1 is firstly mixed by the vibration screening device 2 and then naturally sinks to the layering device 3 disposed right below the vibration screening device 2, the sewage is sufficiently mixed by the vibration screening device 2, sinks along the gravity direction, contacts with a biological film 35 on the layering device 3, the biological film 35 is used for decomposing the pollutant in the sewage, and after the sewage is sufficiently stirred by the layering device 3, the layering can be realized in the sewage tank 1 after a period of standing, and the sewage after the layering is filtered by the sewage purifying system (not shown in the figure), so that the sewage treatment process can be completed.
Further, as a preferred embodiment, as shown in fig. 1, a first water injection hole (not shown in the drawing) is formed at the top of the outer side wall of the sewage tank 1, sewage is injected into the sewage tank 1 through a water pipe 41, one end of the water pipe 41 extends into the sewage tank 1 and is mounted on the first water injection hole of the sewage tank 1 through flange sealing, the end of the water pipe 41 is directly connected with the vibration screening device 2, sewage is injected into the vibration screening device 2 in the sewage tank 1 through the water pipe 41, and after being fully mixed by the vibration screening device 2, the sewage naturally subsides along the gravity direction and fully contacts with the biological membrane 35 on the layering device 3, so that the pretreatment of sewage layering is realized.
As a more preferable embodiment, the sewage semi-automatic layering device further comprises a water filtering tank 5, the water filtering tank 5 is arranged on the water conveying pipeline 41 in a sealing mode through a flange, preferably, the whole outside of the water filtering tank 5 is shaped into a cuboid, the water filtering tank 5 is used for filtering impurities and floaters with larger particles in sewage, preliminary treatment of the sewage is achieved, and the larger particles and floaters in the sewage are prevented from flowing into the sewage tank 1 to block the vibration screening device 2.
As previously described, in some embodiments, the water filtering tank 5 is configured as a detachable structure, for example, a tank shell and a filter element installed in the tank shell are fixedly connected together through bolts, and large-size particles and floaters in the tank shell are filtered by disassembling the tank shell, so that the water filtering performance of the water filtering tank 5 is prevented from being affected by more large-size particles and floaters in the tank shell.
Further, in some embodiments, as shown in fig. 2 and 3, the vibratory screening device 2 is movably disposed inside the sewage tank 1, and when sewage is injected into the vibratory screening device 2 through the water pipe 41, the vibratory screening device 2 moves inside the sewage tank 1, thereby sufficiently mixing the sewage injected into the interior of the vibratory screening device 2.
As described above, the vibration screening device 2 is driven to move inside the sewage tank 1 by the first driving device (not shown in the drawings), in other words, the vibration screening device 2 can be driven by the first driving device disposed inside the sewage tank 1, the first driving device may be a hydraulic cylinder, a driving motor, or the like, and the first driving device preferably drives the vibration screening device 2 to move along the length direction or the width direction of the sewage tank 1, so that when sewage is injected into the vibration screening device 2, the sewage can sufficiently impact the inner side wall of the vibration screening device 2, thereby forming turbulence and/or circulation in the sewage injected into the vibration screening device 2, so that the sewage is sufficiently mixed inside the vibration screening device 2.
Further, as a preferred embodiment, the vibration screening device 2 includes a vibration plate 21, a screening plate 22, two first side plates 23 and two first end plates 24, the vibration plate 21 and the screening plate 22 are oppositely disposed, the vibration plate 21 is located right above the screening plate 22, the two first side plates 23 are respectively used for connecting two ends of the vibration plate 21 and the screening plate 22, the two first side plates 23 are respectively used for installing two sides of the vibration plate 21 and the screening plate 22, the vibration plate 21, the screening plate 22, the two first side plates 23 and the two first end plates 24 are enclosed to form a water passing cavity, the vibration plate 21, the screening plate 22, the two first side plates 23 and the two first end plates 24 are fixedly installed together to form a whole, the first driving device can be a vibration screen, the vibration screening device 2 is fixedly installed on the first driving device, and the first driving device drives the vibration screening device 2 to vibrate or move, so that sewage injected into the interior of the vibration screening device 2 can be fully mixed in the water passing cavity.
In addition, the inside of each first side plate 23, that is, the side facing the vibrating plate 21 and the screening plate 22 is provided with a first clamping groove 231, one end of each first end plate 24 facing the vibrating plate 21 and the screening plate 22 is provided with a second clamping groove 241, each first clamping groove 231 is internally provided with a first sealing strip, each second clamping groove 241 is internally provided with a second sealing strip, and the vibrating plate 21 and the screening plate 22 are respectively arranged in the first clamping grooves and the second clamping grooves in a sealing manner through the first sealing strips and the second sealing strips, so that the sealing performance of the joints of the components of the vibrating screening device is enhanced.
Still further, the inner surface of the vibrating plate 21, i.e. the surface facing the sieving plate 22, is provided with protruding structures 211, preferably protruding structures 211 in the form of saw-tooth teeth, which protruding structures 211 disturb the flow direction of the sewage after the sewage is injected into the water passing cavity, so that the sewage generates turbulence and/or circulation, so that the sewage is thoroughly mixed.
Besides, the inner surface of the sieving plate 22, that is, the surface facing the vibrating plate 21 is provided with water leakage holes 221, the water leakage holes 221 are uniformly arranged on the surface of the sieving plate 22, and when sewage is injected into the water passing cavity, the water leakage holes 221 on the sieving plate 22 play a role in turbulence of sewage flow, so that the sewage is fully mixed, and the fully mixed sewage naturally sinks under the action of self gravity through the water leakage holes 221 of the sieving plate 22.
Still further, the middle of the first end plate 24 at one side close to the first water injection hole of the sewage tank 1 is provided with a second water injection hole 242, one end of the water pipe 41 extends into the water passing cavity through the second water injection hole 242 and is installed in the second water injection hole 242 in a sealing way through a sealing ring, a certain length allowance is reserved on the portion, extending into the sewage tank 1, of the water pipe 41, when the first driving device drives the vibration screening device 2 to move relative to the sewage tank 1, the length allowance of the water pipe 41 can be tensioned or loosened along with the vibration screening device 2, and the water pipe 41 fixedly arranged on the first water injection hole and/or the second water injection hole 242 is prevented from being torn or loose in the moving process of the vibration screening device 2.
Further, as a preferred embodiment, as shown in fig. 4 and 5, the layering device 3 is disposed inside the sewage tank 1 and is located right below the vibration screening device 2, the layering device 3 divides the interior of the sewage tank 1 into layering chambers 11, the preferred layering device 3 is provided with four layering devices 3 which are disposed inside the sewage tank 1 at equal intervals along the gravity direction, one layering chamber 11 is formed between one layering device 3 located at the top end and the vibration screening device 2, three layering chambers 11 are formed between two adjacent layering devices 3, and after sewage after being fully mixed is sunk down along the gravity direction, the sewage is fully contacted with the biological film 35 on the layering device 3, so that pretreatment of sewage injected into the interior of the sewage tank is realized.
In addition, each layering device 3 includes two second end plates 32 and two second side plates 31, the two second end plates 32 are oppositely arranged, the two second side plates 31 are oppositely arranged, two ends of one second end plate 32 are respectively clamped with one ends of the two second side plates 31, two ends of the other second end plate 32 are respectively clamped with the other ends of the two second side plates 31, the two second end plates 32 and the two second side plates 31 form a frame, and a surrounding part forms a cavity, preferably, the cross section of the cavity along the horizontal plane direction is rectangular, the grids 33 are arranged in the cavity, the number of the grids 33 is preferably four, the length direction of each grid 33 is parallel to the length direction of the second side plate 31, two ends of each grid 33 are connected to the two second end plates 32, and the grids 33 are arranged at equal intervals along the length direction of the second side plate 31.
Further, the grating 33 on each layering device 3 can slide along the length direction of the second end plate 32 relative to the frame, in other words, two ends of the grating 33 are slidably connected with the corresponding two second end plates 32, for example, a sliding groove is formed in each second end plate 32, two ends of the grating 33 extend into the sliding groove, and under the action of external force, such as manual pushing or pulling, driving of a driving motor, etc., the grating 33 slides in the sliding groove, and when the grating 33 needs to be folded together, the grating 33 can be operated to slide in the corresponding sliding groove.
As described above, as a preferred embodiment, rubber 34 is provided on both sides of each grating 33, after the gratings 33 folded together are completely opened, the rubber 34 on each two adjacent gratings 33 can be lapped together, the grating 33 and the rubber 34 on each layering device 3 form a water blocking surface, a layering cavity 11 is formed between the water blocking surface positioned at the topmost end of the sewage tank 1 and the vibration screening device 2, the rest layering cavity 11 is formed between the adjacent two water blocking surfaces, sewage is fully mixed and naturally sunk into the sewage tank 1 and contacts with the biological membrane 35 on the layering device 3, and after the pollutants in the sewage are fully decomposed, the sewage is stirred by the layering device 3 and then is kept for a period of time, so that the sewage can be layered.
Further, as a preferred embodiment, each of the grids 33 is fixedly provided with a biological film 35, the biological films 35 are divided into two types of aerobic and anaerobic, because the oxygen content at the top of the sewage in the sewage tank 1 is higher and the oxygen content at the bottom of the sewage is lower, the grids 33 on the two layering devices 3 positioned at the top of the sewage tank 1 are provided with the biological films 35 with the oxygen preference, the grids 33 on the two layering devices 3 positioned at the bottom of the sewage tank 1 are provided with the biological films 35 with the oxygen preference, and meanwhile, the purpose of selecting the aerobic biological films and the anaerobic biological films is to fully remove the pollutants in the sewage, only the aerobic biological films and the anaerobic biological films are matched with each other to remove the pollutants in the sewage, and anaerobic bacteria on the anaerobic biological films can carry out acidolysis treatment on the macromolecular pollutants which are difficult to degrade in the sewage into degradable micromolecules. Then further degrading by aerobic bacteria on the aerobic biomembrane to successfully remove pollutants in sewage treatment.
Still further, each layered assembly 3 may be simultaneously operated to rotate relative to the tank 1, thereby increasing the contact area of the sinking sewage with the biofilm 35 on each layered assembly 3.
As described above, regarding the principle of the positional variation of each layered device 3, for example, the grating 33 on each layered device 3 may also rotate relative to the frame, in other words, each grating 33 may also rotate in the sliding groove of the second end plate 32, both ends of each grating 33 are connected by a connection belt in a driving manner, the connection belt is driven by a motor provided on the sewage tank 1 to rotate, so that the grating 33 rotates relative to the frame, the frame is fixedly connected with the sewage tank 1, and when the sewage after being thoroughly mixed begins to sink, each grating 33 is rotated by a certain angle, so that the grating surface formed by the gratings 33 on each layered device 3 forms a first preset angle α, preferably a first preset angle α=45°, with the direction in which the sewage sinks, thereby increasing the contact area of the sewage with the biofilm 35 on each grating 33.
Alternatively, the principle of the position change of each layering device 3 can also be that, for example, each grid 33 can only slide relative to the frame, a rotating shaft 36 is fixedly arranged between two second end plates 32 of the frame, one rotating shaft 36 extends out of the sewage tank 1 and is connected with an output shaft of an external driving motor through a coupling, the other rotating shaft 36 is rotatably connected with the inner wall of the sewage tank 1 through a bearing, and the driving motor drives the rotating shaft 36 to rotate, so that the frame rotates relative to the sewage tank 1, and the position of the grid 33 on each frame relative to the sewage tank 1 is changed.
Further, when the sewage in the sewage tank 1 is injected to the maximum volume threshold, a predetermined volume of air is input into the sewage tank 1 through the water pipe 41, the vibration screening device 2 stops vibrating, and the layering device 3 rotates relative to the sewage tank 1 at intervals, so that the sewage in the sewage tank 1 is fully mixed, and layering of the sewage in the sewage tank 1 is facilitated.
Further, the outer side wall of the sewage tank 1 is provided with the water outlet pipelines 42, the number of the water outlet pipelines 42 is the same as that of the layered cavities 11, namely, the number of the water outlet pipelines 42 is four, each water outlet pipeline 42 is fixedly arranged on the sewage tank 1 through a flange and is used for discharging sewage corresponding to one layered cavity 11, in other words, each water outlet pipeline 42 arranged on the sewage tank 1 is communicated with the bottom of the corresponding layered cavity 11, so that the sewage in each layered cavity 11 can be completely discharged.
Further, as shown in fig. 6, 7 and 8, a mud storage chamber 12 is formed between the lowest layering device 3 in the sewage tank 1 and the bottom surface of the sewage tank 1, a mud scraping device 6 is arranged in the mud storage chamber 12, the settled mud in the sewage is accumulated in the mud storage chamber 12 under the action of self gravity in the standing process, a mud discharging opening 13 is arranged at the bottom of the sewage tank 1, a first sealing plug 71 is arranged on the mud discharging opening 13 in a sealing manner, the sewage is input into the sewage tank 1, mixed, fully reacted with a biological film 35, fully stirred in the sewage tank 1, and then subjected to standing layering, finally discharged into the sewage purification system through a water outlet pipeline 42 for internal purification, the whole process is a sewage treatment process, and after the sewage circulates five to eight times, the first sealing plug 71 on the mud discharging opening 13 is opened, and the mud is discharged from the mud discharging opening 13 through the mud scraping device 6.
Still further, the sludge scraping device 6 comprises a sludge scraping plate 61 and a pull rod 62, the bottom of the sludge scraping plate 61 is in contact with the bottom of the sewage tank 1, so that the sludge scraping plate 61 can be guaranteed to sufficiently scrape the sludge at the bottom of the sewage tank 1, and accordingly the sludge is discharged from the sludge discharge port 13, one end of the pull rod 62 is fixedly connected with the sludge scraping plate 61, for example, the sludge scraping plate 61 can be fixedly connected through bolts, or one end of the pull rod 62 is welded on the sludge scraping plate 61, the other end of the pull rod 62 extends out of the sewage tank 1 and drives the pull rod to move in the sewage tank through a driving device, for example, a telescopic cylinder body, the bottom of the sludge scraping plate 61 can be fully contacted with the bottom of the sewage tank 1, and therefore the sludge scraping plate 61 is driven to sufficiently scrape the sludge at the bottom of the sewage tank 1, and after the sludge is discharged from the sludge discharge port 13, the driving device drives the pull rod 62 to retract, and therefore the sludge scraping plate 61 is reset.
Further, the pulley 63 is arranged at the bottom of the mud scraping plate 61, the chute is arranged at the bottom of the sewage tank 1, the pulley 63 of the mud scraping plate 61 is positioned in the chute, the bottom part of the mud scraping plate 61 is in contact with the bottom of the sewage tank 1, the pulley 63 on the mud scraping plate 61 slides in the chute, and meanwhile mud scraping of the mud scraping plate 61 can be realized, in the process, as the bottom of the mud scraping plate 61 and the bottom of the sewage tank 1 are in rolling friction, friction between the mud scraping plate 61 and the bottom of the sewage tank 1 can be reduced, and the driving device can pull the pull rod 62 by using small pulling force.
In other words, the pulley 63 is not arranged at the bottom of the mud scraper 61, so that the contact area between the mud scraper 61 and the bottom of the sewage tank 1 is increased, the mud scraping effect of the mud scraper 61 is better, and the friction between the mud scraper 61 and the bottom of the sewage tank 1 can be reduced by arranging the pulley 63 at the bottom of the mud scraper 61.
Still further, the junction of pull rod 62 and sewage case 1 still is provided with second sealing plug 72, and second sealing plug 72 cover is established on pull rod 62, and pull rod 62 can slide in second sealing plug 72, is provided with the connecting hole on the sewage case 1, and second sealing plug 72 and the connecting hole interference fit of sewage case 1 to increased the sealing performance between pull rod 62 and the sewage case 1, avoided sewage to flow out from in the sewage case 1.
Further, as a preferred embodiment, as shown in fig. 9 to 11, the sewage purification system 9 includes the water purification layers 91, the number of the water purification layers 91 is preferably four, and the water purification layers 91 are sequentially arranged in the gravity direction, each water purification layer 91 is filled with the filter particles 92 for filtering the purified sewage, and the particle size of the filter particles 92 in the different water purification layers 91 sequentially arranged in the gravity direction is changed from large to small, in other words, as shown in fig. 9 and 10, the particle size of the filter particles 92 filled in the water purification layer 91 positioned at the top is the largest, and the particle size of the filter particles 92 in the water purification layer 91 positioned at the bottom is the smallest, which is gradually decreased from the particle size of the filter particles 92 in the different water purification layers 91 at the top and bottom.
For convenience of description, different water purification layers 91 and layered cavities 11 are numbered, as shown in fig. 9, as the oxygen content of the position of sewage close to the water surface is higher, the biological film 35 on the layered device 3 between the 1# layered cavity 11 and the 2# layered cavity 11 and the biological film 35 on the layered device 3 between the 2# layered cavity 11 and the 3# layered cavity 11 are aerobic, the biological film 35 on the layered device 3 between the 3# layered cavity 11 and the 4# layered cavity 11 and the biological film 35 on the layered device 3 between the 4# layered cavity 11 and the mud storage cavity 12 are anaerobic, and different types of biological films 35 are selected according to the difference of the oxygen content in the sewage, so that the degradation of macromolecules in the sewage can be accelerated.
As described above, sewage is in the sedimentation process, after standing for a period of time, the degradation thing inside sewage can form the layering under the action of gravity, the degradation thing volume that the inside sewage that the 1# layered cavity 11 was inside contains is minimum, the degradation thing volume that the inside sewage that the 2# was inside was located in the 2# layered cavity 11 increases gradually, pass through first root outlet pipe 42 with the 1# layered cavity 11 and 4# water purification layer 91 intercommunication, pass through second root outlet pipe 42 with 2# layered cavity 11 and 3# water purification layer 91 intercommunication, pass through third root outlet pipe 42 with 3# layered cavity 11 and 2# water purification layer 91 intercommunication, pass through fourth root outlet pipe 42 with 4# layered cavity 11 and 1# water purification layer 91 intercommunication, the sewage that contains less degradation thing is direct with the 4# water purification layer 91 that is located the bottommost, the clean water pressure that has reduced to sewage purification system 9, the sewage that contains more degradation thing is direct with the 1# water purification layer 91 that is located the topmost through the first root outlet pipe 42 intercommunication, and the 2# water purification layer 91 intercommunication that is located the clean water layer 91 in proper order, the inside sewage that the sewage that contains more degradation thing is contained in the 4# layered cavity 11, the inside sewage that the filtration system is not filtered the water purification system is not needed, the filtration system is not filtered to the water purification system is different than the water purification system is filtered to the water purification system is not needed, the filtration level that the inside the water purification system is different than the water purification layer 91, the filtration system is filtered to the water purification system is not filtered to the water purification system is filtered to the water content 1# water purification layer 91.
As described above, as a preferred embodiment, the No. 1 water purifying layer 91 is constructed in a honeycomb structure, and the filler has a particle diameter of 50 to 100mm and a specific gravity of 1.7 to 1.8g/cm 3 Gravel with 30-40% of porosity, connecting channels between the No. 1 water purification layer 91 and the No. 2 water purification layer 91, and setting a rigid net structure with pores lower than 50mm as an interception net.
As described above, as a preferred embodiment, the 2# water purifying layer 91 employs 25 to 45mm and a specific gravity of 1.7 to 1.8g/cm 3 Gravel with the porosity of 30% -40% is filled, biochar with the total volume of not less than 0.01% of the total volume of the layer is supplemented as a filling supplement, the pores of the interception net between the No. 2 water purification layer 91 and the No. 3 water purification layer 91 are lower than 30mm, and a nylon net with the pores of 0.8mm is paved above the interception net of the layer.
As described above, as a preferred embodiment, the 3# water purifying layer 91 employs 10 to 20mm and a specific gravity of 1.7 to 1.8g/cm 3 Gravel with 30-40% of porosity is filled, and ceramsite accounting for 5% of the total volume of the layer is additionally added as a filling material.
As described above, as a preferred embodiment, the 4# water purifying layer 91 employs a specific gravity of 5 to 10mm and a specific gravity of 1.7 to 1.8g/cm 3 Gravel with 30-40% of porosity is filled, the layer is far away from the water inlet end, a groove is arranged at the bottom and is used as a water outlet 93, a rigid framework structure and a compact nylon material are adopted to cover the groove, and the filler is prevented from falling into the groove to block the water outlet 93.
As described above, the inside of the 1# water purifying layer, the 2# water purifying layer, the 3# water purifying layer and the 4# water purifying layer is provided with the filter particles with different granularities, and are sequentially arranged along the gravity direction, thereby forming the artificial wetland, and the filtration and purification of sewage are fully realized through the processes of the adsorption, the retention, the filtration, the precipitation, the conversion and the like of the filter particles.
As shown in fig. 9 to 11, one sewage purification system 9 may be matched with a plurality of sewage layering systems 10, preferably one sewage purification system 9 is matched with three sewage layering systems 10, each sewage layering system 10 works in a peak shifting mode, namely when one sewage layering system 10 is purifying through the sewage purification system 9, the other two sewage layering systems 10 are disconnected from the sewage purification system 9, and the situation that the plurality of sewage layering systems 10 are simultaneously communicated with the sewage purification system 9 should be avoided, so that the water purification pressure of the sewage purification system 9 is reduced. However, when the sewage flow rate of the sewage layering system 10 is small or the sewage purifying system 9 has a high sewage purifying capacity, two or even more sets of sewage layering systems 10 may be simultaneously communicated with the sewage purifying system 9, thereby accelerating the purifying efficiency of sewage.
The invention also discloses a sewage treatment method, which comprises the following steps:
(1) The sewage is injected into a water pipe 41, filtered by a water filtering tank 5 and enters a water filtering cavity;
(2) The screening plate 22 and/or the vibrating plate 21 are operated, and after sewage is fully mixed, the sewage is settled through the water leakage holes 221;
(3) Operating the layering device 3 to enable the plate surface of the grating 33 to form a first preset angle alpha with the gravity direction so as to increase the contact area between sewage and the biological film 35 on the grating 33;
(4) Continuously inputting sewage into the water conveying pipeline 41 until the sewage in the sewage tank 1 reaches a volume threshold;
(5) Stopping the injection of sewage, and inputting a preset volume of air into the sewage tank 1 through the water pipe 41;
(6) The screening plate 22 and the vibrating plate 21 are stationary, rotating the grille or the second end plate 32 along the second preset angle β for a second preset time t2 at intervals of a first preset time t 1;
(7) After the sewage is kept stand for a third preset time t3, slowly folding the grille 33;
after the screening plate 22 and/or the vibration plate 21 are operated to fully mix the sewage, the sewage is settled through the water leakage holes 221;
(8) The grating 33 or the second end plate 32 is rotated to enable the plate surface of the grating 33 to form a first preset angle alpha with the gravity direction so as to increase the contact area between sewage and the biological film 35 on the grating 33;
(9) Continuously inputting sewage into the water conveying pipeline 41 until the sewage in the sewage tank 1 reaches a volume threshold;
(10) Stopping the injection of sewage, and inputting a preset volume of air into the sewage tank 1 through the water pipe 41;
(11) The screening plate 22 and the vibrating plate 21 are stationary, and the grid 33 or the second end plate 32 is rotated along the second preset angle beta every a first preset time t1 for a second preset time t2;
(12) After the sewage is kept stand for a third preset time t3, slowly folding the grille 33;
(13) The water outlet pipes 42 are sequentially opened in the gravity direction, so that the layered sewage sequentially flows into the corresponding water purifying layers 91.
Preferably, the first preset angle α=45°, the second preset angle β is (30 to 150) °, the first preset time t1=0.5 h, the second preset time t2=12 h, and the third preset time t3=72 h.
As described above, in the sewage treatment process, steps (1) to (13) are one treatment cycle, and according to the working experience, when the sewage treatment system is circulated five to eight times, it is necessary to drain the sludge from the sludge storage chamber 12, open the first sealing plug 71 on the sludge discharge port 13, and discharge the sludge from the sludge discharge port 13 through the sludge scraping device 6.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. The sewage treatment system is characterized by comprising a sewage layering system for layering sewage and a sewage purifying system for purifying the layered sewage, wherein the sewage purifying system comprises a water purifying layer, the water purifying layers are sequentially arranged along the gravity direction, filtering particles with the particle size from large to small are respectively filled in different water purifying layers sequentially arranged along the gravity direction, and the layered sewage is in operable communication with the water purifying layer so as to realize the filtering and purifying of the sewage layer by the filtering particles; the sewage layering system comprises a sewage tank and a division plate arranged in the sewage tank, the division plate divides the interior of the sewage tank into at least two layering cavities, the sewage purifying system comprises water purifying layers with the same number as the layering cavities, wherein in every two adjacent water purifying layers, the bottom of one water purifying layer positioned above is communicated with the top of one water purifying layer positioned below, and the bottom of the water purifying layer positioned at the bottommost is provided with a water outlet; a supporting framework for supporting the filter particles is arranged at the water outlet;
the sewage tank is provided with water outlet pipelines with the same number as the layered cavities, and each water outlet pipeline is used for discharging sewage corresponding to one layered cavity and injecting the sewage into the water purifying layer;
the sewage layering system further comprises a vibration screening device and a layering device, wherein the vibration screening device is arranged in the sewage tank and used for mixing sewage flowing into the sewage tank, the layering device is arranged in the water tank and located below the vibration screening device, the layering device comprises a separation plate and a grid, the grid is arranged on the separation plate, a biological film used for catalyzing sewage reaction is further arranged on the grid, the sewage mixed by the vibration screening device is settled along the gravity direction and is contacted with the biological film on the grid, and the grid is further operable to increase the movement of the sewage and the contact area of the biological film.
2. The sewage treatment system according to claim 1, wherein the vibration screening device comprises a vibration plate and a screening plate, the vibration plate is arranged opposite to the screening plate, a convex structure is arranged on one surface of the vibration plate facing the screening plate, a water leakage hole is arranged on one surface of the screening plate facing the vibration plate, and after the sewage is mixed by the vibration plate and/or the screening plate, the sewage is settled along the gravity direction through the water leakage hole and is contacted with the biological film arranged on the grid below the screening plate.
3. The sewage treatment system according to claim 2, wherein the sewage layering system further comprises a water filtering tank, and a water pipe for inputting the sewage is provided on the sewage tank.
4. A sewage treatment system according to claim 3, wherein the sewage stratification system further comprises a sludge scraping device arranged in the sewage tank and positioned at the bottom of the sewage tank, a sludge discharge opening is arranged on the sewage tank, and the sludge scraping device is used for discharging sludge in the sewage tank through the sludge discharge opening.
5. A sewage treatment method applied to the sewage treatment system according to claim 4, comprising:
injecting sewage into a water pipeline, filtering the sewage by the water filtering tank, and then entering the vibration screening device;
the vibration screening device is operated, and after the sewage is fully mixed, the sewage is settled;
the layering device is operated, so that the surface of the grating and the gravity direction form a first preset angle alpha, and the contact area between the sewage and the biological film on the grating is increased;
continuously inputting the sewage into the water conveying pipeline until the sewage in the sewage tank reaches a volume threshold;
stopping injecting the sewage, and inputting air with a preset volume into the sewage tank through the water conveying pipeline;
the screening plate and the vibrating plate are static, the grid or the separating plate is rotated along a second preset angle beta at intervals of a first preset time t1, and the second preset time t2 is continued;
after the sewage is kept stand for a third preset time t3, the grille is folded;
sequentially opening the water outlet pipelines along the gravity direction to enable the layered sewage to flow into the water purifying layer;
the sewage is filtered by the water purifying layer and then discharged through the water outlet of the water purifying layer positioned at the bottommost end.
6. The method according to claim 5, wherein when the water outlet pipes are sequentially opened along the gravity direction, the water outlet pipes adjacent to and above the water outlet pipes are ensured to completely drain the sewage corresponding to the layered cavity, so that the water outlet pipes can be opened.
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| KR20070021288A (en) * | 2007-01-12 | 2007-02-22 | 한상관 | Method to purify polluted water naturally |
| CN204509035U (en) * | 2014-12-08 | 2015-07-29 | 金华碧水蓝天环保科技有限公司 | Complex media marsh sewage treatment system |
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