CN114835344B - Efficient and energy-saving sewage treatment system and treatment method - Google Patents
Efficient and energy-saving sewage treatment system and treatment method Download PDFInfo
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- CN114835344B CN114835344B CN202210581247.1A CN202210581247A CN114835344B CN 114835344 B CN114835344 B CN 114835344B CN 202210581247 A CN202210581247 A CN 202210581247A CN 114835344 B CN114835344 B CN 114835344B
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- 239000010865 sewage Substances 0.000 title claims abstract description 144
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 601
- 238000001471 micro-filtration Methods 0.000 claims abstract description 65
- 238000004062 sedimentation Methods 0.000 claims abstract description 59
- 239000010802 sludge Substances 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 37
- 238000005381 potential energy Methods 0.000 claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000010992 reflux Methods 0.000 claims abstract description 14
- 238000011045 prefiltration Methods 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 178
- 238000007667 floating Methods 0.000 claims description 105
- 230000007246 mechanism Effects 0.000 claims description 70
- 238000007789 sealing Methods 0.000 claims description 59
- 238000007599 discharging Methods 0.000 claims description 38
- 238000005507 spraying Methods 0.000 claims description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
- 239000006228 supernatant Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 230000001580 bacterial effect Effects 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 241000700605 Viruses Species 0.000 claims description 4
- 238000005842 biochemical reaction Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 210000000476 body water Anatomy 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000002352 surface water Substances 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 244000000010 microbial pathogen Species 0.000 description 3
- 241000233866 Fungi Species 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
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Classifications
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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
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- 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
- C02F2303/04—Disinfection
-
- 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
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- 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)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a high-efficiency energy-saving sewage treatment system which comprises a prefilter system, first-stage microfiltration equipment, a double-micro generator, a denitrification tank, a regulating tank, a potential energy biological sewage purifier, a denitrification reflux system, second-stage microfiltration equipment, a sludge recycling system and a disinfection sedimentation tank which are sequentially arranged along the sewage flowing direction. The effluent of the prefilter system flows into the first stage of microfiltration equipment, and impurities such as tiny particles which cannot be removed in the oil separation sedimentation tank are removed in the microfiltration equipment; the double micro generators realize effective anaerobic and micron-sized filtration; the potential energy biological sewage purifier realizes a multi-stage A/O process. The invention has the characteristics of good water outlet index and low electric energy consumption, and the treated sewage can reach the main standard of class III water in the quality standard of surface water environment.
Description
Technical Field
The invention relates to a sewage treatment system, in particular to a high-efficiency energy-saving sewage treatment system.
Background
The sewage treatment system is to treat sewage generated in daily activities by using professional sewage treatment equipment so as to reach the discharge standard. The existing sewage treatment mode generally comprises the steps of precipitating impurities in sewage through a sewage sedimentation tank, and removing organic matters in water through anaerobic and aerobic treatment, so that the treatment period is long.
Chinese patent: 201720857431.9 discloses a high-efficiency treatment system for urban sewage, which adopts multi-stage treatment equipment to treat sewage, degrades micromolecular pollutants in the sewage, and simultaneously carries out deep filtration on the sewage by a membrane assembly, but the sewage treatment system needs to consume a large amount of electric energy, has high purification treatment cost and does not accord with the environment-friendly idea of low carbon and energy conservation.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a high-efficiency energy-saving sewage treatment system, which improves the sewage purification effect.
The technical scheme adopted for achieving the purpose is as follows:
A high-efficiency energy-saving sewage treatment system comprises a prefilter system, a first-stage microfiltration device, a double-micro generator, a denitrification tank, an adjusting tank, a potential energy biological sewage purifier, a denitrification reflux system, a second-stage microfiltration device, a sludge recycling system and a disinfection sedimentation tank which are sequentially arranged along the sewage flow direction;
The effluent of the prefilter system flows into the microfiltration device of the first stage, and the microfiltration device of the first stage removes impurities such as tiny particles which cannot be removed in the prefilter system.
The pre-filtering system comprises a grating and an oil separation sedimentation tank, a water outlet of the grating is communicated with the oil separation sedimentation tank, an outlet of the oil separation sedimentation tank is communicated with the micro-filtering equipment of the first stage, the grating is used for preliminarily intercepting undegraded organic matters of large sewage particles, the intercepted sewage flows into the oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink at the bottom of the tank, and supernatant flows into the micro-filtering equipment of the first stage through the outlet;
a water outlet pump is arranged in the regulating tank, one end of the regulating tank is provided with a water inlet, the water inlet is connected with the denitrification tank, the water outlet pump is connected with a potential energy biological sewage purifier, and the regulating tank is used for storing sewage purified by the denitrification tank, and regulating water quantity and uniform water quality;
the potential energy biological sewage purifier realizes atmosphere reoxygenation, improves dissolved oxygen in water and removes nitrogen and phosphorus.
The denitrification reflux system comprises a purifying tank, one end of the purifying tank is communicated with a potential energy biological sewage purifier, the other end of the purifying tank is communicated with a second-stage microfiltration device, a water outlet pump is arranged in the purifying tank and is connected with the denitrification tank, and the necessary proportional reflux to the denitrification tank is realized by adjusting the flow of the water outlet pump according to water quality condition detection indexes;
The sludge recycling system comprises an activated sludge tank, a second-stage microfiltration device is communicated with the activated sludge tank, water filtered by the second-stage microfiltration device is discharged into a disinfection sedimentation tank, the second-stage microfiltration device discharges intercepted activated sludge and suspended matters into the activated sludge tank, mixed liquor in the activated sludge tank is used as a carbon source to partially reflux to a denitrification tank according to the water quality condition, and the rest part is subjected to static sedimentation and then is transported to the outside for treatment.
The water purification microfiltration equipment comprises a water storage tank, a first water inlet and a first water outlet are respectively arranged on the water storage tank, a filter screen unit is arranged in the water storage tank, a bottom plate is fixedly connected to the lower portion of the water storage tank, a through hole is formed in the bottom plate, the filter screen unit is arranged on the periphery of the through hole, a bottom plate water outlet is formed in the side portion of the bottom plate, the bottom plate water outlet is communicated with the first water outlet, and a cleaning mechanism is arranged in the filter screen unit.
The upper part of the bottom plate is provided with a water drain port, the water drain port is positioned at the outer side of the filter screen unit, the side part of the water storage tank is provided with a second water outlet, the side part of the bottom plate is provided with a sewage port, the sewage port is communicated with the second water outlet, and the water drain port is provided with a water drain mechanism;
the number of the filter screen units is multiple, and through holes corresponding to the number of the filter screen units are formed in the bottom plate;
The filter screen unit comprises a frame and a filter screen, wherein the frame is formed by welding metal pipes, the frame is fixedly connected to the periphery of the through hole, the filter screen is fixedly connected to the side part of the frame, and a cleaning mechanism is arranged in the frame;
the range of the filter screen is 800-1200 meshes.
The cleaning mechanism comprises a first mounting tube and a second mounting tube, the first mounting tube is arranged on the upper portion of the frame, the second mounting tube is arranged on the lower portion of the frame, the first mounting tube and the second mounting tube are arranged in the same plane, a water spraying tube is rotationally connected between the first mounting tube and the second mounting tube, the length of the water spraying tube is matched with the height of the filter screen, a plurality of water spraying heads are arranged on the water spraying tube, the water spraying heads are uniformly arranged on the water spraying tube, the upper portion of the water spraying tube is fixedly connected with a water flow tube, and the water flow tube is connected with a second high-pressure water pump;
the water draining mechanism comprises a water storage plate, the lower part of the water storage plate is fixedly connected with a water storage bin, the bottom of the water storage bin is provided with a drainage pipe and a flow inlet pipe, the diameter of the drainage pipe is smaller than that of the flow inlet pipe, the flow inlet pipe is connected with a first high-pressure water pump, the upper part of the water storage plate is provided with a water sac, two sides of the water storage plate are respectively provided with guide posts in a penetrating way, one end of each guide post is fixedly connected with a first sealing plate, the top of each guide post is fixedly connected with a second sealing plate, the first sealing plate is arranged above the water draining port, and the water storage plate is fixedly connected with a bottom plate through a stand column;
the upper portion of water tank is equipped with level sensor, and level sensor is connected with the controller, first high-pressure water pump and second high-pressure water pump are connected respectively to the controller, and the controller is connected with control panel, is equipped with the warning light on the control panel.
The potential energy biological sewage purifier comprises an upper water tank component and a standard layer component, wherein a bacterial bed is arranged in the standard layer component, the upper water tank component comprises a fifth water storage tank, a first water storage tank is arranged on the upper portion of the fifth water storage tank, the fifth water storage tank is communicated with the first water storage tank, the first water storage tank is communicated with a second tank assembly through a first tank water discharging mechanism, the fifth water storage tank is communicated with the standard layer component through the second tank assembly, a fourth tank assembly is arranged at the bottom of the fifth water storage tank, and a fourth tank assembly is arranged in the standard layer component at the upper stage between adjacent standard layers.
The first box body water draining mechanism comprises a communication pipe and a first floating shaft, wherein a first sealing ball is arranged at one end of the first floating shaft, a floating body is arranged at the other end of the first floating shaft, a first water inlet is arranged at one end of the communication pipe, a through hole is formed in the other end of the communication pipe, the first floating shaft penetrates through the first water inlet at one end of the communication pipe and the through hole at the other end of the communication pipe respectively, and the first sealing ball is positioned above the first water inlet;
One side of the communication pipe is connected with an elbow, and the other end of the elbow is connected with a second box body assembly;
The second tank body component comprises a second water storage tank and a second water outlet mechanism, the second water storage tank is connected with a fifth water storage tank through a support leg, one side of the second water storage tank is connected with the other end of the bent pipe, the bottom of the fifth water storage tank is provided with a water outlet, a standard layer of a first stage is arranged below the water outlet, the second water outlet mechanism is arranged between the water outlet and the fifth water storage tank, the upper edge of the second water storage tank is in a non-closed state, the bottom of the second water storage tank is provided with a second water outlet, and the outer side of the second water outlet is provided with the second water outlet mechanism;
The second water outlet mechanism comprises a second floating shaft, a second float and a second sealing plate, a through hole is formed in the bottom of the second water storage tank, the second floating shaft is arranged in the through hole, one end of the second floating shaft is fixedly connected with the second float, the second float is arranged in the second water storage tank, the other end of the second floating shaft is fixedly connected with the second sealing plate, and the second sealing plate is arranged above the water outlet;
The second water draining mechanism comprises a second floating shaft support, a second floating shaft and a second sealing float, wherein the second floating shaft support is fixedly connected with the bottom of the second water storage tank, a through hole is formed in the second floating shaft support, a second floating shaft is arranged in the through hole, the end part of the second floating shaft is fixedly connected with the second sealing float, and the second sealing float is arranged on the outer side of the second water draining port;
The fourth tank body component comprises a fourth water storage tank, a fourth water discharging mechanism and a fourth water discharging mechanism, a water inlet pipe is arranged at the bottom of the fourth water storage tank, the fourth water discharging mechanism is arranged at the bottom of the fourth water storage tank, and the two fourth water storage tanks are connected through the fourth water discharging mechanism;
the fourth water outlet mechanism comprises a connecting rod, a pull shaft and a fourth sealing plate, the two fourth water storage tanks are fixedly connected through the connecting rod, one end of the pull shaft penetrates through the pull rod to enter the standard layer, the end part of the pull shaft is fixedly connected with the fourth sealing plate, and the fourth sealing plate is arranged at the position of a water outlet on the standard layer;
The fourth water discharging mechanism comprises a fourth floating shaft and a fourth floating seal, a floating shaft hole is arranged in the middle of the fourth water storage tank, a water discharging hole is arranged at the periphery of the floating shaft hole, the fourth floating shaft is arranged in the floating shaft hole, and the fourth floating seal is arranged at the bottom of the fourth floating shaft;
The bottom of the fourth water storage tank is provided with supporting legs.
The third water outlet mechanism comprises a third water diversion tank, the third water diversion tank is fixedly connected with the third water storage tank through supporting legs, a through hole is formed in the middle of the bottom of the third water diversion tank, a third connecting rod is arranged in the through hole, one end of the third connecting rod is fixedly connected with a third sealing plate, and the other end of the third connecting rod is fixedly connected with a third float;
the bottom of the third water diversion tank is provided with a third water outlet which is communicated with the third water storage tank, and the outer side of the third water outlet is provided with a third water discharging mechanism;
the third water discharging mechanism comprises a third floating shaft and a third floating seal, a track hole is formed in the inner side of a third water discharging port on the bottom of the third water distribution box, the third floating shaft is arranged in the track hole, and one end of the third floating shaft is fixedly connected with the third floating seal.
The invention also discloses a sewage treatment method for treating sewage by the sewage treatment system, which comprises the following steps:
S0: the sewage is initially intercepted by a grid, undegraded organic matters of large sewage particles are intercepted, the intercepted sewage flows into an oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink on the bottom of the tank, and supernatant flows into micro-filtration equipment of a first stage through an outlet;
s1: filtering by a filter screen unit in the microfiltration equipment to remove impurities such as tiny particles which cannot be removed in the oil separation sedimentation tank, enabling effluent to flow into a double-micro generator, adsorbing and degrading pollutant particles needing to be degraded in sewage, and realizing efficient anaerobic reaction;
s3: the effluent of the double micro generators enters a denitrification tank to carry out biochemical reaction, so as to realize denitrification and dephosphorization;
s4: the effluent of the denitrification tank enters a regulating tank for storing filtered sewage, regulating the water quantity and the uniform water quality, extracting the sewage in the regulating tank, sending the sewage into a potential energy biological sewage purifier, and realizing automatic repeated A/O between standard layer components by means of potential energy to reduce COD, BOD, ammonia nitrogen and total nitrogen indexes in the sewage;
S5: the effluent of the potential energy biological sewage purifier enters a purifying tank, and a certain proportion of water is refluxed to S3 according to the condition of water quality detection indexes;
s6: the effluent of the purifying pond flows into a second-stage microfiltration device, the water filtered by the second-stage microfiltration device is discharged into a disinfection sedimentation tank, pathogenic microorganisms, such as bacteria and viruses, and the like, remained in the water are removed by adding medicines, sedimentation and disinfection in the disinfection sedimentation tank, and the effluent is discharged after reaching the standard;
s7: the micro-filtration device discharges the intercepted activated sludge and suspended matters into an activated sludge tank, and the mixed liquor of the activated sludge tank with a certain proportion flows back to enter S3 according to the detection condition of water quality.
The invention has the beneficial effects that:
1. The invention has the characteristics of good effluent index and low electric energy consumption, the invention primarily intercepts undegraded organic matters of large sewage particles through a grid, then floats low-density matters on the water surface by utilizing oil separation precipitation, sinks high-density matters at the bottom of a tank, flows supernatant into micro-filtration equipment to remove impurities such as tiny particles which cannot be removed in an oil separation precipitation tank, carries out micron-level filtration to remove tiny impurities and anaerobic treatment through a double micro-generator, carries out biochemical reaction through a denitrification tank to realize denitrification and dephosphorization, and a potential energy biological sewage purifier reduces COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen and total nitrogen) indexes in sewage, flows into second-level micro-filtration equipment after passing through the purification tank, is discharged after being filtered and is subjected to disinfection precipitation, and the effluent index can reach class III water standard specified in the quality standard of surface water environment after the process;
according to the water quality condition detection index, the water in the purifying tank is refluxed to the denitrifying tank for re-purification by using a denitrifying reflux system in a certain proportion;
The sludge recycling system is utilized to discharge the second-stage micro-intercepted activated sludge and suspended matters into the activated sludge tank, the mixed liquor in the activated sludge tank is partially returned to the denitrification tank as a carbon source according to the water quality condition, and the rest part is subjected to static settlement and then outward transportation treatment, so that the production cost can be further saved, and the environment-friendly development concept of cyclic utilization is met.
Particularly, the sewage is filtered in different specifications layer by layer through the grids, the oil separation sedimentation tank, the microfiltration equipment and the double micro generators, so that the infiltration filtration efficiency is enhanced, the impurity blocking filter materials are reduced, and the anaerobic treatment is facilitated.
2. According to the microfiltration equipment adopted in the invention, the water tank is internally provided with the plurality of groups of filter screen mechanisms, so that the area of the filter screen is increased, the filter screen is washed by utilizing high-pressure water through the design of the cleaning mechanism, the problem that the filter screen is easy to block is solved, the water draining mechanism is designed, and the water in the water tank is discharged before the filter screen is washed, so that the cleaning effect of the filter screen is further improved.
3. The potential energy biological sewage purifier adopted by the invention realizes uninterrupted and continuous water supply of the upper water tank, is intelligent, and reduces the failure rate; the multi-layer standard layer component realizes atmosphere reoxygenation through potential energy, and has low energy consumption; the multiple layers of automatic repeated A/O has very good treatment effect, and effectively reduces the indexes of COD, BOD, ammonia nitrogen and total nitrogen in the sewage.
The method can quickly and repeatedly realize atmospheric reoxygenation without blast aeration, only improves the dissolved oxygen in water by means of water potential energy, has low energy consumption, synchronously realizes dephosphorization, and has the characteristics of high efficiency and energy conservation.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment system according to the present invention;
FIG. 2 is a schematic structural view of a microfiltration device;
FIG. 3 is a top view of a microfiltration apparatus;
FIG. 4 is a schematic diagram of the bottom plate structure of the microfiltration device;
FIG. 5 is a schematic diagram of a potential energy biological sewage purifier;
FIG. 6 is a schematic diagram of the structure at A in FIG. 5;
FIG. 7 is a top view of a potential energy biological sewage purifier;
FIG. 8 is a cross-sectional view of B-B of FIG. 5;
fig. 9 is a schematic diagram of the structure at B in fig. 8.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
1-7, The high-efficiency energy-saving sewage treatment system comprises a prefilter system, a first-stage microfiltration device, a double-micro generator, a denitrification tank, an adjusting tank, a potential energy biological sewage purifier, a denitrification reflux system, a second-stage microfiltration device, a sludge recycling system and a disinfection sedimentation tank which are sequentially arranged along the sewage flow direction;
the effluent of the prefilter system flows into the microfiltration equipment of the first stage, and the prefilter system removes impurities such as tiny particles which cannot be removed in the oil separation sedimentation tank.
The prefilter system comprises a grid and an oil separation sedimentation tank, wherein a water outlet of the grid is communicated with the oil separation sedimentation tank, and an outlet of the oil separation sedimentation tank is communicated with the microfiltration equipment of the first stage. The oil separation sedimentation tank utilizes the principle of density and specific gravity difference of different substances to sediment larger waste particles to the bottom of the tank, and the larger waste particles are removed by floating on the oil surface relatively lightly. One end of the oil separation sedimentation tank is provided with an inlet, the other end of the oil separation sedimentation tank is provided with an outlet, and the inlet and the outlet are used for sewage to enter and discharge. The upper part of the outlet is provided with an upper port used for discharging grease formed in the oil separation sedimentation tank, and the lower part of the outlet is provided with a lower port used for removing sediment. The inlet of the oil separation sedimentation tank is provided with a valve for adjusting the opening and closing of sewage inflow and the flow rate. The grid and the oil separation sedimentation tank adopt the prior art.
In operation, the grid initially intercepts undegraded organic matters of large sewage particles, the intercepted sewage flows into an oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink at the bottom of the tank, and supernatant flows into the micro-filtration equipment of the first stage through an outlet;
The micro-filtration equipment of first level effectively gets rid of impurity such as tiny particle that can not get rid of in the oil removal sedimentation tank, and the play water flows into two micro-generators, two micro-generators belong to the filter from the broad sense, filter screen in the filter sets up along the horizontal direction, and sewage flows through two micro-generators from down up, anaerobic microorganism has been added to the lower part of two micro-generators, two micro-generator's filter screen is the micron level. The double micro generators are used for micron-level filtration and are subjected to long-time anaerobic microbial treatment, so that the water is more clean. The dual micro generator adopts the prior art.
The sewage discharged by the double micro generators flows into a denitrification tank for denitrification, so that denitrification and dephosphorization are realized. The denitrification tank adopts conventional technical means.
The regulating tank is used for storing the sewage purified by the denitrification tank, regulating the water quantity and the uniform water quality, enabling the subsequent process to work under relatively stable conditions, and supplying water to the potential energy biological sewage purifier after the sewage is treated by the regulating tank. The sewage treatment device is characterized in that a water outlet pump is arranged in the regulating tank, a water inlet is formed in one end of the regulating tank, the water inlet is communicated with the denitrification tank, and a water suction pipe on the water outlet pump is connected with the potential energy biological sewage purifier. In the work, the sewage in the regulating tank is pumped by the water outlet pump, and the water is input into the potential energy biological sewage purifier through the water pumping pipe.
The denitrification reflux system comprises a purifying tank, a water outlet pump is arranged in the purifying tank, the purifying tank is communicated with a second-stage microfiltration device, the water outlet pump is connected with the denitrification tank, and the necessary proportional reflux to the denitrification tank is realized by adjusting the flow of the water outlet pump according to water quality condition detection indexes;
The sewage discharged from the purifying tank flows into the second-stage micro-filtration device, a first water outlet of the second-stage micro-filtration device is communicated with the disinfection sedimentation tank, and a second water outlet of the micro-filtration device is connected with the sludge recycling system. In operation, the water filtered by the microfiltration equipment is discharged into a disinfection sedimentation tank, and the microfiltration equipment discharges the intercepted activated sludge and suspended matters into a sludge recycling system.
The sludge recycling system comprises an activated sludge tank, a second-stage microfiltration device is communicated with the activated sludge tank, water filtered by the second-stage microfiltration device is discharged into a disinfection sedimentation tank, the second-stage microfiltration device discharges intercepted activated sludge and suspended matters into the activated sludge tank, mixed liquor in the activated sludge tank is used as a carbon source to partially reflux to a denitrification tank according to the water quality condition, and the rest part is subjected to static sedimentation and then is transported to the outside for treatment.
The water filtered by the microfiltration equipment is discharged into a disinfection sedimentation tank, pathogenic microorganisms such as bacterial viruses, odor and phosphorus remained in the water are removed by dosing sedimentation disinfection in the disinfection sedimentation tank, and the effluent is discharged after reaching the standard.
As shown in fig. 2-4, the structure of the micro-filtration equipment of the first stage adopted in the invention is the same as that of the micro-filtration equipment of the second stage, the micro-filtration equipment comprises a water storage tank 6-1, a first water outlet 6-3 and a first water inlet 6-2 are respectively arranged at the side part of the water storage tank 6-1, four groups of rectangular filter screen units are arranged in the water storage tank 6-1, impurities contained in sewage are accurately and efficiently filtered by the filter screen units, a bottom plate 6-4 is fixedly connected to the bottom of the water storage tank, the bottom plate 6-4 is of a hollow structure, four groups of rectangular through holes 6-5 are arranged at the upper part of the bottom plate 6-4, the positions and the number of the through holes 6-5 correspond to those of the filter screen units, a bottom plate water outlet 6-6 is arranged at the side part of the bottom plate 6-4, and the bottom plate water outlet 6-6 is communicated with the first water outlet 6-3. During operation, sewage enters the water storage tank 6-1 through the first water inlet 6-2, the filter screen unit filters the sewage, the filtered sewage enters the bottom plate 6-4 through the through hole 6-5, and then is discharged through the bottom plate water outlet 6-6 and the first water outlet 6-3.
The filter screen unit comprises a rectangular frame 6-7, the frame 6-7 is formed by welding metal pipes, the frame 6-7 is fixedly connected to the periphery of the through hole 6-5, a filter screen 6-8 is fixedly connected to the side part of the frame 6-7, the range of the filter screen 6-8 is 800-1200 meshes, and the filter screen 6-8 with smaller specification is selected to improve the sewage purifying effect.
In order to further realize the recycling of the filter screen, a cleaning mechanism is arranged in the filter screen unit and comprises a first mounting tube 6-9 and a second mounting tube, the first mounting tube 6-9 is fixedly connected to the upper portion of the frame 6-7 in the horizontal direction, the second mounting tube is fixedly connected to the lower portion of the frame 6-7 in the horizontal direction, the first mounting tube 6-9 and the second mounting tube are located in the same plane vertical to the bottom plate, a water spraying tube 6-10 is rotationally connected between the first mounting tube 6-9 and the second mounting tube, the length of the water spraying tube 6-10 is matched with the height of the filter screen 6-8, a plurality of water spraying heads 6-11 are arranged on the water spraying tube 6-10 in the vertical direction, the water spraying heads 6-11 are distributed on two symmetrical sides of the water spraying tube 6-10 at equal intervals, the number of one side is odd, the other side is even, and each side of the water spraying heads 6-11 is uniformly distributed. The water spraying direction of the water spraying head 6-11 is in the same direction bending, and an included angle is formed between the water spraying direction and the water spraying pipe 6-10. The upper part of the water spray pipe 6-10 is fixedly connected with a water flow pipe which is connected with a second high-pressure water pump.
When the device works, high-pressure water in the water flow pipe enters the water spraying pipe 6-10 and fills the internal cavity, and is sprayed out from the water spraying head 6-11 to clean the filter screen, and the sprayed high-pressure water generates reaction force on the water spraying pipe 6-10 due to the fact that the water spraying direction of the water spraying head 6-11 is bent in the same direction, so that the water spraying pipe 6-10 rotates to do circular motion to drive the water spraying head 6-11 to clean the filter screen from multiple angles.
In order to further clean the filter screen, the water in the water storage tank 6-1 needs to be discharged, and the impact force applied to the filter screen is increased. The upper end face of the bottom plate 6-4 is provided with a water drain port 6-22, the side part of the water storage tank 6-1 is provided with a second water outlet 6-20, the position of the side part of the bottom plate 6-4 corresponding to the second water outlet 6-20 is provided with a sewage port 6-23, the sewage port 6-23 is communicated with the second water outlet 6-20, and the upper part of the water drain port 6-22 is sealed with a water drain mechanism.
The water draining mechanism comprises a water storage plate 6-12, a water storage bin 6-13 is fixedly connected to the lower portion of the water storage plate 6-12, a drainage pipe 6-14 and a flow inlet pipe 6-15 are arranged at the bottom of the water storage bin 6-13, the diameter of the drainage pipe 6-14 is smaller than that of the flow inlet pipe 6-15, the flow inlet pipe 6-15 is connected with a first high-pressure water pump, a water storage port is arranged on the water storage plate 6-12 and is communicated with the water storage bin 6-13, a water bag 6-16 is sealed in the water storage port, guide posts 6-17 are movably connected to the two sides of the water storage plate 6-12, a first sealing plate 6-18 is fixedly connected to the bottom of the guide posts 6-17, a second sealing plate 6-19 is fixedly connected to the upper portion of the guide posts 6-17, and the first sealing plate 6-18 is arranged above the water drainage port 6-22, and the water storage plate 6-12 is fixedly connected with a bottom plate 6-4 through a stand column.
When the filter works, high-pressure water enters the water storage bin through the inflow pipe 6-15, the water bag 6-16 is gradually supported by the high-pressure water in the water storage bin 6-13, the second sealing plate 6-19 is jacked up along with the increase of the volume of the water bag 6-16, so that the guide post 6-17 drives the first sealing plate 6-18 to move upwards, the water drain port 6-22 is opened, water in the water storage bin 6-1 is discharged, and the filter screen is conveniently cleaned by the cleaning mechanism; the first high-pressure water pump continuously supplies water to the water bag 6-16, and the water in the water bag 6-16 is discharged through the drain pipe 6-14, and the drain port is always in an open state because the diameter of the drain pipe 6-14 is smaller than that of the inflow pipe 6-15.
The upper portion of storage water tank 6-1 is equipped with liquid level sensor 6-21, and liquid level sensor 6-21 is connected with the controller, first high-pressure water pump and second high-pressure water pump are connected respectively to the controller, and the controller is located in the control panel, is equipped with the attention device on the control panel, and first high-pressure water pump is connected into flow tube 6-15, and the high-pressure water props up the water pocket to open water drain 6-22, and the second high-pressure water pump is connected with the water flow tube, and high-pressure water is spouted through sprinkler bead 6-11, thereby washs the filter screen.
When the water storage tank 6-1 works, after water in the water storage tank reaches a warning line, the liquid level sensor 6-21 sends an electric signal to the controller, the warning device gives an alarm, an operator closes the first water outlet 6-3 and opens the second water outlet 6-20, the first high-pressure water pump is started through the control panel, the water discharge port 6-22 is opened, sewage in the water storage tank 6-1 is discharged through the second water outlet 6-20, the second high-pressure water pump is started through the control panel, high-pressure water of the second high-pressure water pump enters the water spraying pipe 6-10, and the high-pressure water is sprayed out from the water spraying head 6-11, so that a filter screen is cleaned.
As shown in fig. 5-7, the potential energy biological sewage purifier comprises an upper water tank component and a standard layer component, wherein the upper water tank component comprises a fifth water tank 5, a first water tank 1 is arranged at the upper part of the fifth water tank 5, a second tank component 2 is arranged at the lower part of the first water tank 1, the fifth water tank 5 is communicated with the first water tank 1, the first water tank 1 is communicated with the second tank component 2 through a first tank water discharging mechanism, the bottom of the fifth water tank 5 is fixedly connected with the standard layer component of the first stage, the fifth water tank 5 is communicated with the standard layer component of the first stage through the second tank component 2, a fourth tank component is arranged at the bottom of the fifth water tank 5 and used for controlling the water discharging of the standard layer component of the first stage, and a fourth tank component is arranged in the standard layer component of the upper stage and used for controlling the standard layer component of the next stage.
The first water storage tank 1 is fixedly connected with the fifth water storage tank 5 through supporting legs, one side of the first water storage tank 1 is provided with a water outlet pipe 1-4, and the water outlet pipe 1-4 is used for communicating the first water storage tank 1 with the fifth water storage tank 5.
The first box body water discharging mechanism comprises a communication pipe 1-1 and a first floating shaft 1-8, wherein one end of the communication pipe 1-1 is provided with a first water inlet 1-3, the other end of the communication pipe 1-1 is provided with a through hole, the through hole is internally provided with the first floating shaft 1-8, one end of the first floating shaft 1-8 is provided with a first sealing ball 1-2, the other end of the first floating shaft 1-8 is provided with a floating body 1-6, the first floating shaft 1-8 respectively penetrates through the first water inlet at one end of the communication pipe 1-1 and the through hole at the other end of the communication pipe 1-1, and the first sealing ball 1-2 is positioned above the first water inlet 1-3.
The side part of the other end of the communication pipe 1-1 is connected with a bent pipe 1-5, and the other end of the bent pipe 1-5 is connected with a second box body assembly 2.
During operation, sewage is injected into the first water storage tank 1, the sewage in the first water storage tank 1 enters the fifth water storage tank 5 through the water outlet pipe 1-4, the floating body 1-6 drives the first floating shaft 1-8 and the first sealing ball 1-2 to move upwards along with the rising of the water level in the fifth water storage tank 5, so that the first water inlet 1-3 is opened, and the sewage in the first water storage tank 1 enters the second tank body assembly 2 through the first water inlet 1-3 and the bent pipe 1-5.
The second tank body assembly 2 is arranged in the fifth water storage tank 5, the second tank body assembly 2 comprises a second water storage tank 2-1 and a second water outlet mechanism, the second water storage tank 2-1 is fixedly connected with the fifth water storage tank 5 through supporting legs, a water outlet 2-5 is arranged at the bottom of the fifth water storage tank 5, a standard layer of a first level is connected below the water outlet 2-5, the second water outlet mechanism is arranged between the water outlet 2-5 and the second water storage tank 2-1, and the second water outlet mechanism is used for controlling the opening and closing of the water outlet 2-5. One side of the second water storage tank 2-1 is connected with the other end of the bent pipe 1-5 and is a water inlet of the second water storage tank 2-1.
The second water outlet mechanism comprises a second floating shaft 2-3, a second floating shaft 2-2 and a second sealing plate 2-4, a through hole is formed in the middle position of the bottom of the second water storage tank 2-1, the second floating shaft 2-3 is arranged in the through hole, one end of the second floating shaft 2-3 is fixedly connected with the second floating shaft 2-2, the second floating shaft 2-2 is arranged in the second water storage tank, the other end of the second floating shaft 2-3 is fixedly connected with the second sealing plate 2-4, and the second sealing plate 2-4 is arranged above the water outlet 2-5.
The upper edge of the second water storage tank 2-1 is in a non-closed state, a second water drain port 2-6 is arranged at the bottom of the second water storage tank 2-1, water in the second water storage tank 2-1 is drained into the fifth water storage tank 5 through the second water drain port 2-6, a second water drain mechanism is arranged at the outer side of the second water drain port 2-6 and used for controlling the opening and closing of the second water drain port 2-6, and sewage in the second water storage tank 2-1 is drained.
When the sewage treatment device works, sewage enters the second water storage tank 2-1 through the bent pipe 1-5, water in the fifth water storage tank 5 flows into the second water storage tank 2 through the upper edge of the second water storage tank 2-1, and when the second float 2-2 is subjected to buoyancy force larger than the load of the second float 2-2, the second float 2-2 drives the second float shaft 2-3 and the second sealing plate 2-4 to move upwards, so that the water outlet 2-5 is opened.
The second water draining mechanism comprises a second floating shaft support 2-9, a second sealing floating shaft 2-8 and a second sealing float 2-7, wherein the second floating shaft support 2-9 is fixedly connected with the bottom of the second water storage tank 2, a through hole is formed in the second floating shaft support 2-9, the second sealing floating shaft 2-8 is arranged in the through hole, the second sealing floating shaft 2-8 moves up and down along the through hole, the end part of the second sealing floating shaft 2-8 is fixedly connected with the second sealing float 2-7, and the second sealing float 2-7 is arranged outside the second water outlet 2-6.
When the water level control device works, along with the water discharge of the water outlet 2-5, the water level line in the fifth water storage tank 5 descends, along with the descending of the water level line, the second sealing float 2-7 moves downwards, so that the second water outlet 2-6 is opened, water in the second water storage tank 2-1 flows out through the second water discharge port 2-6, and simultaneously, along with the descending of the water level in the second water storage tank 2, the second float 2-2 drives the second sealing plate 2-4 to move downwards, so that the water outlet 2-5 is closed.
The fourth tank body assembly comprises a fourth water storage tank 4, a fourth water discharging mechanism and a fourth water discharging mechanism, a water inlet pipe 4-3 is arranged at the bottom of the fourth water storage tank 4 and used for discharging water from a fifth water storage tank 5 into the fourth water storage tank 4, the fourth water discharging mechanism is arranged at the bottom of the fourth water storage tank 4, the two fourth water storage tanks 4 are connected through the fourth water discharging mechanism, the fourth water storage tank 4 provides power for the fourth water discharging mechanism, and the fourth water discharging mechanism 4 is used for controlling the on-off of a water outlet on a standard layer of the next stage.
The fourth water outlet mechanism comprises a connecting rod, a pull shaft 4-8 and a fourth sealing plate 4-9, the two fourth water storage tanks are fixedly connected through the connecting rod, shaft holes 4-6 are formed in the connecting rod and the fifth water storage tank 5, one end of the pull shaft 4-8 penetrates through the shaft holes 4-6 in the pull shaft and the fifth water storage tank to enter the standard layer component of the first stage, one end of the pull shaft 4-8 is fixedly connected with a baffle in the horizontal direction, the other end of the pull shaft 4-8 is connected with the fourth sealing plate 4-9, and the fourth sealing plate 4-9 is arranged at the position of the water outlet 2-5 in the standard layer of the first stage.
The fourth water discharging mechanism comprises a fourth floating shaft 4-4 and a fourth floating seal 4-7, a floating shaft hole 4-5 is arranged in the middle of the fourth water storage tank, water discharging holes are formed in the periphery of the floating shaft hole 4-5, a plurality of water discharging holes are uniformly distributed around the floating shaft hole 4-5, the fourth floating shaft 4-4 is arranged in the floating shaft hole 4-5, the fourth floating seal 4-7 is arranged at the bottom of the fourth floating shaft 4-4, and the fourth floating shaft 4-4 and the fourth floating seal 4-7 are matched and used for discharging water to the water discharging holes.
The supporting legs are arranged on the periphery of the bottom of the fourth water storage tank 4, and the height of the fourth water storage tank is raised through the supporting legs, so that the movement of the fourth floating shaft 4-4 and the fourth floating seal 4-7 is facilitated.
The upper part of the fourth water storage tank 4 is provided with the air holes 4-2, and the air holes 4-2 facilitate the rapid release of water in the fourth water storage tank 4 through the water outlet.
When the device works, as the water quantity in the fifth water storage tank 5 rises, the fourth water storage tank 4 floats upwards, and the pull shaft 4-8 and the fourth sealing plate 4-9 move upwards along with the fourth water storage tank 4, so that the water outlet 2-5 of the standard layer component of the first stage is opened for discharging water; the fourth floating shaft 4-4 and the fourth floating seal 4-7 at the lower part of the fourth water storage tank 4 also move upwards, so that the water drain holes arranged at the periphery of the floating shaft hole 4-5 are sealed; along with the rising of the water level in the fifth water storage tank 5, sewage enters the fourth water storage tank 4 through the water inlet pipe 4-3, the water level in the fourth water storage tank 4 reaches a certain height, the fourth water storage tank 4 sinks, and therefore the fourth sealing plate 4-9 seals the water outlet 2-5 of the standard layer.
Along with the drop of the water level in the fifth water storage tank 5, the fourth floating shaft 4-4 sinks to open the water outlet hole to discharge the water in the fourth water storage tank 4 at a position lower than the water inlet pipe 4-3.
The fifth water storage tank 5 is internally provided with a third tank body 3, the third tank body 3 comprises a third water storage tank 3-1 and a third water outlet mechanism, the bottom of the third water storage tank 3-1 is provided with a third water outlet 3-6, the third water outlet 3-6 is communicated with the fifth water storage tank 5, a third water outlet mechanism is arranged above the third water outlet 3-6 and used for controlling the opening and closing of the third water outlet 3-6 and used for draining sewage in the third water storage tank 3-1.
The third water outlet mechanism comprises a third water diversion tank 3-2, the third water diversion tank 3-2 is fixedly connected with a third water storage tank 3 through supporting legs, a through hole is formed in the middle of the bottom of the third water diversion tank 3-2, a third connecting rod 3-4 is arranged in the through hole, the third connecting rod 3-4 moves up and down in the through hole, one end of the 3-4 of the third connecting rod is fixedly connected with a third sealing plate 3-5, the third sealing plate 3-5 is arranged above a third water outlet 3-6, and the other end of the third connecting rod 3-4 is fixedly connected with a third float 3-3. When the third float 3-3 is in operation and subjected to buoyancy force larger than the load, the third float 3-3 drives the third connecting rod 3-4 and the third sealing plate 3-5 to move upwards, so that the third water outlet 3-6 is opened.
The bottom of the third water diversion tank 3-2 is provided with a track hole, the outer side of the track hole is uniformly provided with a third water discharge port 3-8, the inner side of the track hole is provided with a third water discharge mechanism for controlling the opening and closing of the third water discharge port 3-8, and sewage of the third water diversion tank 3-2 flows into the third water storage tank 3 by controlling the third water discharge port 3-8.
The third water discharging mechanism comprises a third floating shaft 3-9 and a third floating seal 3-7, the third floating shaft 3-9 is arranged in the track hole, and one end of the third floating shaft 3-9 is fixedly connected with the third floating seal 3-7.
When the sewage treatment device works, sewage flows into the third water storage tank 3 along with the rising of the water level in the fifth water storage tank 5, gradually rises along with the water level in the third water storage tank 3, floats up the third floating seal 3-7 and seals the third water outlet 3-8; along with the rising of the water level in the third water storage tank 3-1, sewage enters the tank body from the upper part of the third water diversion tank 3-2, the third float 3-3 floats upwards to open the third water outlet 3-6, and the fifth water storage tank 5 is communicated with the third water storage tank 3.
When water is discharged, along with the gradual decline of the sewage in the fifth water storage tank 5 and the third water storage tank 3, when the sewage level in the third water storage tank 3 is lower than the third floating seal 3-7, the third floating seal 3-7 sinks to open the third water discharge port 3-8, the water level of the third water diversion tank 3-2 gradually declines, and the third floating seal 3-3 descends to close the third water outlet 3-6.
The standard layer components are sequentially arranged from top to bottom and are mutually overlapped, bacterial beds are arranged in the standard layer components, water inflow between each standard layer component is controlled by a fourth box body component in the previous standard layer component, the upper water box component enables sewage to intermittently pass through the bacterial beds, the bacterial beds are used for replacing biological bacteria, COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen and total nitrogen indexes in the sewage are reduced, the reoxygenation period is controlled by utilizing water buoyancy, the reoxygenation period can be accurately and rapidly regulated, and the deoxidization and dephosphorization efficiency is further improved. The connection structure between the adjacent standard layer components and the mounting mode of the fungus bed are not limited at the place where the invention is not focused, and the fungus bed adopts a structure which is conventional in the mechanical field and can realize the functions of supporting and fixing.
In the work, sewage in the regulating reservoir enters the upper water tank of the potential energy biological sewage purifier, the automatic repeated A/O of the multi-standard layer component is realized by means of potential energy, the indexes of COD, BOD, ammonia nitrogen and total nitrogen in the sewage are rapidly reduced, and the dephosphorization is synchronously realized.
The sewage treatment method for treating sewage by adopting the sewage treatment system comprises the following steps:
S0: the sewage is initially intercepted by a grid, undegraded organic matters of large sewage particles are intercepted, the intercepted sewage flows into an oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink on the bottom of the tank, and supernatant flows into micro-filtration equipment of a first stage through an outlet;
s1: filtering by a filter screen unit in the microfiltration equipment to remove impurities such as tiny particles which cannot be removed in the oil separation sedimentation tank, enabling effluent to flow into a double-micro generator, adsorbing and degrading pollutant particles needing to be degraded in sewage, and realizing efficient anaerobic reaction;
s3: the effluent of the double micro generators enters a denitrification tank to carry out biochemical reaction, so as to realize denitrification and dephosphorization;
s4: the effluent of the denitrification tank enters a regulating tank for storing filtered sewage, regulating the water quantity and the uniform water quality, extracting the sewage in the regulating tank, sending the sewage into a potential energy biological sewage purifier, and realizing automatic repeated A/O between standard layer components by means of potential energy to reduce COD, BOD, ammonia nitrogen and total nitrogen indexes in the sewage;
S5: the effluent of the potential energy biological sewage purifier enters a purifying tank, and a certain proportion of water is refluxed to S3 according to the condition of water quality detection indexes;
s6: the effluent of the purifying pond flows into a second-stage microfiltration device, the water filtered by the second-stage microfiltration device is discharged into a disinfection sedimentation tank, pathogenic microorganisms, such as bacteria and viruses, and the like, remained in the water are removed by adding medicines, sedimentation and disinfection in the disinfection sedimentation tank, and the effluent is discharged after reaching the standard;
s7: the micro-filtration device discharges the intercepted activated sludge and suspended matters into an activated sludge tank, and the mixed liquor of the activated sludge tank with a certain proportion flows back to enter S3 according to the detection condition of water quality.
The invention has the characteristics of good effluent index and low electric energy consumption, the invention primarily intercepts undegraded organic matters of large sewage particles through the grid, then floats low-density matters on the water surface by utilizing oil separation precipitation, the high-density matters sink at the bottom of the tank, the supernatant flows into micro-filtration equipment to remove impurities such as tiny particles which cannot be removed in an oil separation precipitation tank, then micro-level filtration is carried out by a double micro-generator to remove the tiny impurities and anaerobic treatment is carried out, denitrification and dephosphorization are realized by a denitrification tank, and a potential energy biological sewage purifier reduces COD, BOD, ammonia nitrogen and total nitrogen indexes in the sewage, flows into the second-level micro-filtration equipment after passing through the purification tank, is discharged after being filtered and is subjected to disinfection precipitation, and the effluent index can reach class III water standard specified in the surface water environment quality standard after the process.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. An efficient energy-saving sewage treatment device is characterized in that: comprises a prefilter system, a first-stage microfiltration device, a double-micro generator, a denitrification tank, an adjusting tank, a potential energy biological sewage purifier, a denitrification reflux system, a second-stage microfiltration device, a sludge recycling system and a disinfection sedimentation tank which are sequentially arranged along the sewage flowing direction;
The effluent of the prefilter system flows into the first stage of microfiltration equipment, and the first stage of microfiltration equipment removes tiny particles which cannot be removed in the prefilter system;
the pre-filtering system comprises a grating and an oil separation sedimentation tank, a water outlet of the grating is communicated with the oil separation sedimentation tank, an outlet of the oil separation sedimentation tank is communicated with the micro-filtering equipment of the first stage, the grating is used for preliminarily intercepting undegraded organic matters of large sewage particles, the intercepted sewage flows into the oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink at the bottom of the tank, and supernatant flows into the micro-filtering equipment of the first stage through the outlet;
a water outlet pump is arranged in the regulating tank, one end of the regulating tank is provided with a water inlet, the water inlet is connected with the denitrification tank, the water outlet pump is connected with a potential energy biological sewage purifier, and the regulating tank is used for storing sewage purified by the denitrification tank, and regulating water quantity and uniform water quality;
the potential energy biological sewage purifier realizes atmosphere reoxygenation, improves dissolved oxygen in water, removes nitrogen and removes phosphorus;
The denitrification reflux system comprises a purifying tank, one end of the purifying tank is communicated with a potential energy biological sewage purifier, the other end of the purifying tank is communicated with a second-stage microfiltration device, a water outlet pump is arranged in the purifying tank and is connected with the denitrification tank, and the necessary proportional reflux to the denitrification tank is realized by adjusting the flow of the water outlet pump according to water quality condition detection indexes;
The sludge recycling system comprises an activated sludge tank, a second-stage micro-filtration device is communicated with the activated sludge tank, water filtered by the second-stage micro-filtration device is discharged into a disinfection sedimentation tank, the second-stage micro-filtration device discharges intercepted activated sludge and suspended matters into the activated sludge tank, mixed liquor in the activated sludge tank is used as a carbon source to partially reflux to a denitrification tank according to the water quality condition, and the rest part is subjected to static sedimentation and then is transported to treatment;
The potential energy biological sewage purifier comprises an upper water tank component and a standard layer component, wherein a bacterial bed is arranged in the standard layer component, the upper water tank component comprises a fifth water storage tank, a first water storage tank is arranged at the upper part of the fifth water storage tank, the fifth water storage tank is communicated with the first water storage tank, the first water storage tank is communicated with a second tank assembly through a first tank water discharging mechanism, the fifth water storage tank is communicated with the standard layer component through a second tank assembly, a fourth tank assembly is arranged at the bottom of the fifth water storage tank, and a fourth tank assembly is arranged in the standard layer component at the upper stage between adjacent standard layers;
The first box body water draining mechanism comprises a communication pipe and a first floating shaft, wherein a first sealing ball is arranged at one end of the first floating shaft, a floating body is arranged at the other end of the first floating shaft, a first water inlet is arranged at one end of the communication pipe, a through hole is formed in the other end of the communication pipe, the first floating shaft penetrates through the first water inlet at one end of the communication pipe and the through hole at the other end of the communication pipe respectively, and the first sealing ball is positioned above the first water inlet;
One side of the communication pipe is connected with an elbow, and the other end of the elbow is connected with a second box body assembly;
The second tank body component comprises a second water storage tank and a second water outlet mechanism, the second water storage tank is connected with a fifth water storage tank through a support leg, one side of the second water storage tank is connected with the other end of the bent pipe, the bottom of the fifth water storage tank is provided with a water outlet, a standard layer of a first stage is arranged below the water outlet, the second water outlet mechanism is arranged between the water outlet and the fifth water storage tank, the upper edge of the second water storage tank is in a non-closed state, the bottom of the second water storage tank is provided with a second water outlet, and the outer side of the second water outlet is provided with the second water outlet mechanism;
The second water outlet mechanism comprises a second floating shaft, a second float and a second sealing plate, a through hole is formed in the bottom of the second water storage tank, the second floating shaft is arranged in the through hole, one end of the second floating shaft is fixedly connected with the second float, the second float is arranged in the second water storage tank, the other end of the second floating shaft is fixedly connected with the second sealing plate, and the second sealing plate is arranged above the water outlet;
The second water draining mechanism comprises a second floating shaft support, a second floating shaft and a second sealing float, wherein the second floating shaft support is fixedly connected with the bottom of the second water storage tank, a through hole is formed in the second floating shaft support, a second floating shaft is arranged in the through hole, the end part of the second floating shaft is fixedly connected with the second sealing float, and the second sealing float is arranged on the outer side of the second water draining port;
The fourth tank body component comprises a fourth water storage tank, a fourth water discharging mechanism and a fourth water discharging mechanism, a water inlet pipe is arranged at the bottom of the fourth water storage tank, the fourth water discharging mechanism is arranged at the bottom of the fourth water storage tank, and the two fourth water storage tanks are connected through the fourth water discharging mechanism;
The fourth water outlet mechanism comprises a connecting rod, a pull shaft and a fourth sealing plate, the two fourth water storage tanks are fixedly connected through the connecting rod, one end of the pull shaft penetrates through the connecting rod to enter the standard layer, the end part of the pull shaft is fixedly connected with the fourth sealing plate, and the fourth sealing plate is arranged at the position of a water outlet on the standard layer;
The fourth water discharging mechanism comprises a fourth floating shaft and a fourth floating seal, a floating shaft hole is arranged in the middle of the fourth water storage tank, a water discharging hole is arranged at the periphery of the floating shaft hole, the fourth floating shaft is arranged in the floating shaft hole, and the fourth floating seal is arranged at the bottom of the fourth floating shaft;
The bottom of the fourth water storage tank is provided with supporting legs;
The third water outlet mechanism comprises a third water diversion tank, the third water diversion tank is fixedly connected with the third water storage tank through supporting legs, a through hole is formed in the middle of the bottom of the third water diversion tank, a third connecting rod is arranged in the through hole, one end of the third connecting rod is fixedly connected with a third sealing plate, and the other end of the third connecting rod is fixedly connected with a third float;
the bottom of the third water diversion tank is provided with a third water outlet which is communicated with the third water storage tank, and the outer side of the third water outlet is provided with a third water discharging mechanism;
The third water discharging mechanism comprises a third floating shaft and a third floating seal, a track hole is formed in the inner side of a third water discharging port on the bottom of the third water distribution box, a third floating shaft is arranged in the track hole, and one end of the third floating shaft is fixedly connected with the third floating seal;
The cleaning mechanism comprises a first mounting tube and a second mounting tube, the first mounting tube is arranged on the upper portion of the frame, the second mounting tube is arranged on the lower portion of the frame, the first mounting tube and the second mounting tube are arranged in the same plane, a water spraying tube is rotationally connected between the first mounting tube and the second mounting tube, the length of the water spraying tube is matched with the height of the filter screen, a plurality of water spraying heads are arranged on the water spraying tube, the water spraying heads are uniformly arranged on the water spraying tube, the upper portion of the water spraying tube is fixedly connected with a water flow tube, and the water flow tube is connected with a second high-pressure water pump;
The water draining mechanism comprises a water storage plate, the lower part of the water storage plate is fixedly connected with a water storage bin, the bottom of the water storage bin is provided with a drainage pipe and a flow inlet pipe, the diameter of the drainage pipe is smaller than that of the flow inlet pipe, the flow inlet pipe is connected with a first high-pressure water pump, the upper part of the water storage plate is provided with a water sac, two sides of the water storage plate are respectively penetrated with a guide post, one end of the guide post is fixedly connected with a first sealing plate, the other end of the guide post is fixedly connected with a second sealing plate, the first sealing plate is arranged above a water draining port, and the water storage plate is fixedly connected with a bottom plate through a stand column;
the upper portion of water tank is equipped with level sensor, and level sensor is connected with the controller, first high-pressure water pump and second high-pressure water pump are connected respectively to the controller, and the controller is connected with control panel, is equipped with the warning light on the control panel.
2. The sewage treatment device according to claim 1, wherein the water purification micro-filtration equipment comprises a water storage tank, a first water inlet and a first water outlet are respectively arranged on the water storage tank, a filter screen unit is arranged in the water storage tank, a bottom plate is fixedly connected to the lower part of the water storage tank, a through hole is formed in the bottom plate, the filter screen unit is arranged on the periphery of the through hole, a bottom plate water outlet is formed in the side part of the bottom plate, the bottom plate water outlet is communicated with the first water outlet, and a cleaning mechanism is arranged in the filter screen unit.
3. The sewage treatment device according to claim 2, wherein the upper part of the bottom plate is provided with a water drain port, the water drain port is positioned at the outer side of the filter screen unit, the side part of the water storage tank is provided with a second water outlet, the side part of the bottom plate is provided with a sewage port, the sewage port is communicated with the second water outlet, and the water drain port is provided with a water drain mechanism;
the number of the filter screen units is multiple, and through holes corresponding to the number of the filter screen units are formed in the bottom plate;
The filter screen unit comprises a frame and a filter screen, wherein the frame is formed by welding metal pipes, the frame is fixedly connected to the periphery of the through hole, the filter screen is fixedly connected to the side part of the frame, and a cleaning mechanism is arranged in the frame;
the range of the filter screen is 800-1200 meshes.
4. A sewage treatment method for treating sewage by using the sewage treatment apparatus according to any one of claims 1 to 3, comprising the steps of:
S0: the sewage is initially intercepted by a grid, undegraded organic matters of large sewage particles are intercepted, the intercepted sewage flows into an oil separation sedimentation tank, low-density matters float on the water surface in the oil separation sedimentation tank, high-density matters sink on the bottom of the tank, and supernatant flows into micro-filtration equipment of a first stage through an outlet;
S1: filtering by a filter screen unit in the microfiltration equipment to remove tiny particles which cannot be removed in the oil separation sedimentation tank, and enabling effluent to flow into a double-micro generator to adsorb and degrade pollutant particles needing to be degraded in sewage so as to realize efficient anaerobic reaction;
s3: the effluent of the double micro generators enters a denitrification tank to carry out biochemical reaction, so as to realize denitrification and dephosphorization;
s4: the effluent of the denitrification tank enters a regulating tank for storing filtered sewage, regulating the water quantity and the uniform water quality, extracting the sewage in the regulating tank, sending the sewage into a potential energy biological sewage purifier, and realizing automatic repeated A/O between standard layer components by means of potential energy to reduce COD, BOD, ammonia nitrogen and total nitrogen indexes in the sewage;
S5: the effluent of the potential energy biological sewage purifier enters a purifying tank, and a certain proportion of water is refluxed to S3 according to the condition of water quality detection indexes;
s6: the effluent of the purifying pond flows into a second-stage microfiltration device, the water filtered by the second-stage microfiltration device is discharged into a disinfection sedimentation tank, and residual bacterial viruses, stink and phosphorus in the water are removed by chemical adding sedimentation disinfection in the disinfection sedimentation tank, and the effluent is discharged after reaching the standard;
s7: the micro-filtration device discharges the intercepted activated sludge and suspended matters into an activated sludge tank, and the mixed liquor of the activated sludge tank with a certain proportion flows back to enter S3 according to the detection condition of water quality.
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