CN113264615B - Sewage treatment system - Google Patents
Sewage treatment system Download PDFInfo
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- CN113264615B CN113264615B CN202110822366.7A CN202110822366A CN113264615B CN 113264615 B CN113264615 B CN 113264615B CN 202110822366 A CN202110822366 A CN 202110822366A CN 113264615 B CN113264615 B CN 113264615B
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- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000005188 flotation Methods 0.000 claims abstract description 92
- 238000010564 aerobic fermentation Methods 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 18
- 238000000855 fermentation Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000013049 sediment Substances 0.000 claims description 16
- 239000002893 slag Substances 0.000 claims description 15
- 238000007790 scraping Methods 0.000 claims description 14
- 230000003139 buffering effect Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims 6
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 15
- 230000006872 improvement Effects 0.000 description 9
- 238000005189 flocculation Methods 0.000 description 6
- 230000016615 flocculation Effects 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003307 slaughter Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a sewage treatment system, which comprises a main air flotation tank, an auxiliary air flotation tank, an anaerobic fermentation tank, an aerobic fermentation tank and a sedimentation tank which are sequentially communicated, and further comprises a main dissolved air tank and an auxiliary dissolved air tank, wherein the main air flotation tank and the auxiliary air flotation tank are respectively communicated with the main dissolved air tank and the auxiliary dissolved air tank, the volume of the auxiliary air flotation tank is 10-35% of that of the main air flotation tank, and the dissolved air amount of the auxiliary dissolved air tank is 5-35% of that of the main dissolved air tank. The invention has the advantage that the floc content in the discharged sewage can be ensured to be relatively stable without controlling the power of the main dissolved air tank and the auxiliary dissolved air tank in real time. In addition, the equipment investment of the auxiliary air flotation tank and the auxiliary dissolved air tank is not large. The main dissolved air tank and the auxiliary dissolved air tank are easy to control, the running load of the dissolved air tanks is stable, and the flocculate clearance rate is stable.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a sewage treatment system.
Background
The Chinese patent application with publication number CN112047583A discloses a slaughterhouse sewage treatment process, wherein slaughter wastewater passes through a coarse grid well, the wastewater after being treated by an oil separation tank enters a fine grid well, effluent enters a regulating tank, the effluent is lifted by a pump and enters an air floatation machine, and a flocculating agent is added to reduce COD (chemical oxygen demand) and remove suspended matters and oil slick substances; the effluent of the air flotation machine enters an adjusting and hydrolyzing tank, and the effluent of the adjusting and hydrolyzing tank enters a subsequent anoxic tank; the effluent of the anoxic tank enters an aerobic tank, and under the condition of aeration, the organic matters in the wastewater are decomposed into CO by using aerobic microorganisms2And water; the wastewater automatically flows into a sedimentation tank after two-stage aerobic treatment, sludge and water are precipitated and separated in the wastewater, supernatant enters a subsequent disinfection tank, sludge at the bottom of the sedimentation tank enters a sludge tank, a sludge-water mixture in the middle of the sedimentation tank returns to an anoxic tank, effluent of the sedimentation tank enters the disinfection tank, and deodorization, decoloration, sterilization and disinfection treatment are carried out on the effluent through ultraviolet rays, so that residual organic matters and inorganic matters in the wastewater are removed.
In fact, the composition of the sewage input into the sewage treatment system in each time period is unstable, the content of grease in the sewage is unstable, and in order to stabilize the content of flocculate in the water discharged from the air flotation tank, the prior art generally needs to adjust the dissolved air amount of the dissolved air tank from time to time, so that the control of the dissolved air tank is difficult. The dissolved air tank is based on the principle that sewage is pumped from the bottom of the air floatation tank, air is mixed into the sewage and then discharged into the air floatation tank, and flocs mixed with the air have larger volume and smaller density and can float upwards. When the dissolved air volume of the dissolved air tank is increased, the pressure in the dissolved air tank is increased, and the manufacturing cost of the dissolved air tank is greatly improved.
Therefore, the prior art is in need of improvement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the control of the dissolved air tank is difficult.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
the utility model provides a sewage treatment system, includes main air supporting pond, vice air supporting pond, anaerobic fermentation pond, good oxygen fermentation pond and the sedimentation tank that communicates in proper order, still includes that the owner dissolves the gas pitcher and vice gas pitcher that dissolves, main air supporting pond with the gas pitcher intercommunication is dissolved to the owner, vice air supporting pond with vice gas pitcher intercommunication is dissolved, the volume in vice air supporting pond does the volume in main air supporting pond 10-35%, the gas capacity that dissolves the gas pitcher is dissolved 5-35% of the gas capacity that dissolves of main air pitcher to vice.
As a further improvement of the technical scheme, the device also comprises an adjustable output pipe, a controller and a concentration detector which are electrically connected with each other; the concentration detectors are arranged in the main air flotation tank and the auxiliary air flotation tank and are used for detecting the concentration of flocculate; the adjustable output pipe is communicated with the main dissolved air tank, the air displacement of the adjustable output pipe is 5-25% of the total output quantity of the main dissolved air tank during working, the adjustable output pipe is a hose, the adjustable output pipe is connected with a manipulator, and the manipulator is electrically connected with the controller; when the difference value between the concentration in the main air flotation tank and the concentration in the auxiliary air flotation tank detected by the concentration detector is smaller than a preset threshold value a, the controller controls the manipulator to move above the main air flotation tank, and the adjustable output pipe can convey sewage to the main air flotation tank; when the difference value between the concentration in the main air flotation tank and the concentration in the auxiliary air flotation tank detected by the concentration detector is greater than a preset threshold value b, the controller controls the manipulator to move above the auxiliary air flotation tank, and the adjustable output pipe can convey sewage to the auxiliary air flotation tank; said a is less than said b.
As a further improvement of the above technical solution, when the concentration of flocs in the secondary air flotation tank detected by the concentration detector is lower than a preset threshold C, the controller controls the secondary air dissolving tank to stop, and when the concentration of flocs in the secondary air flotation tank detected by the concentration detector is greater than or equal to the preset threshold C, the controller controls the secondary air dissolving tank to operate.
As a further improvement of the technical scheme, the manipulator comprises a clamping jaw and a power reducing mechanism, the power reducing mechanism is used for driving the clamping jaw to extend or shorten, and the clamping jaw is connected with the adjustable output pipe; the air floatation mechanism is characterized in that a sliding block is connected to the shrinkage power mechanism, a rail and a translation power mechanism are connected to the sliding block, the translation power mechanism is connected to the rail, the translation power mechanism can drive the sliding block to move along the rail, the rail is arranged beside the main air floatation tank and the auxiliary air floatation tank, and the translation power mechanism and the shrinkage power mechanism are electrically connected with the controller.
As a further improvement of the technical scheme, the air floatation device further comprises a pretreatment tank, wherein a buffer channel is arranged in the main air floatation tank, the main air floatation tank is in a cube shape, the buffer channel is arranged at one edge of the main air floatation tank, a water inlet is formed in the upper part of the buffer channel and is communicated with the pretreatment tank, the direction of water flow in the buffer channel is from top to bottom, and the water flow flows into a main body of the main air floatation tank from the lower part of the buffer channel; a first air floatation outlet is formed in the lower portion of the side wall of the main air floatation tank, the first air floatation outlet and the buffer channel are located on the same diagonal line of the main air floatation tank, and water flows into the auxiliary air floatation tank from the first air floatation outlet; a second air floatation outlet is formed in the lower portion of the side wall of the auxiliary air floatation tank, the second air floatation outlet and the first air floatation outlet are located on the same diagonal line of the auxiliary air floatation tank, and water flows out of the auxiliary air floatation tank from the second air floatation outlet; the rivers direction in the anaerobic fermentation pond is from the bottom up, be equipped with vice buffering passageway in the aerobic fermentation pond, the upper portion of vice buffering passageway with the anaerobic fermentation pond intercommunication, the lower part of vice buffering passageway with the main part intercommunication of aerobic fermentation pond, the rivers direction in the vice buffering passageway is from the top down, the rivers direction in the aerobic fermentation pond is from the bottom up.
As a further improvement of the technical scheme, the air floatation device further comprises a slag groove, wherein the slag groove is arranged between the main air floatation tank and the auxiliary air floatation tank, the bottom of the slag groove is hermetically connected with a lower baffle, and the first air floatation outlet is arranged on the lower baffle; the middle part in sediment groove is equipped with the overhead gage, the top of overhead gage is higher than main air supporting pond height with the height in vice air supporting pond, the left part in sediment groove with the upper portion intercommunication in main air supporting pond, the right part in sediment groove with the upper portion intercommunication in vice air supporting pond, the bottom intercommunication in sediment groove has the scum pipe, the outer end of scum pipe is located main air supporting pond with outside the vice air supporting pond.
As the further improvement of the technical scheme, the device also comprises a residue scraping assembly, wherein the residue scraping assembly comprises a power mechanism, a main scraper and an auxiliary scraper, the power mechanism is used for driving the main scraper and the auxiliary scraper to move, the main scraper is arranged on the main air floatation tank, the auxiliary scraper is arranged on the auxiliary air floatation tank, flocs on the main air floatation tank can be scraped into the residue groove by the main scraper, and the flocs on the auxiliary air floatation tank can be scraped into the residue groove by the auxiliary scraper.
As a further improvement of the technical scheme, the upper part of the sedimentation tank is communicated with a sewage discharge pipeline, the middle part of the sedimentation tank is communicated with a recovery pipeline, and the recovery pipeline is communicated with the aerobic fermentation tank.
The invention has the beneficial effects that: the floc content in the discharged sewage can be ensured to be relatively stable without controlling the power of the main dissolved air tank and the auxiliary dissolved air tank in real time. In addition, the equipment investment of the auxiliary air flotation tank and the auxiliary dissolved air tank is not large. The invention has the advantages that the control of the main dissolved air tank and the auxiliary dissolved air tank is simple, the running load of the dissolved air tank is stable, and the flocculate clearance rate is stable.
Drawings
FIG. 1 is a schematic view of the structure of a sewage treatment system of the present invention;
fig. 2 is a sectional view a-a of fig. 1.
In the figure: 1-a main air flotation tank, 2-an auxiliary air flotation tank, 3-an anaerobic fermentation tank, 4-an aerobic fermentation tank, 41-an auxiliary buffer channel, 5-a sedimentation tank, 51-a sewage discharge pipeline, 52-a recovery pipeline, 6-a main dissolved air tank, 7-an auxiliary dissolved air tank, 8-an adjustable output pipe, 9-a clamping claw, 10-a shrinkage power mechanism, 11-a slide block, 12-a track, 13-a translation power mechanism, 14-a pretreatment tank, 15-a buffer channel, 16-a first air flotation outlet, 17-a second air flotation outlet, 18-a slag groove, 19-a lower baffle, 20-an upper baffle, 21-a slag discharge pipe, 22-a power mechanism, 23-a main scraper and 24-an auxiliary scraper.
Detailed Description
The invention is described in detail below with reference to specific embodiments.
Referring to fig. 1 to 2, the embodiment of the sewage treatment system of the present invention specifically includes:
the utility model provides a sewage treatment system, includes main air supporting pond 1, vice air supporting pond 2, anaerobic fermentation pond 3, aerobic fermentation pond 4 and sedimentation tank 5 that communicate in proper order, still includes that main gas pitcher 6 and vice gas pitcher 7 of dissolving are dissolved to main air supporting pond 1, and main air supporting pond 1 and main gas pitcher 6 intercommunication of dissolving, vice air supporting pond 2 and vice gas pitcher 7 intercommunication of dissolving, and the volume of vice air supporting pond 2 is 10-35% of the volume of main air supporting pond 1, and the gas capacity of vice gas pitcher 7 of dissolving is 5-35% of the gas capacity of main gas pitcher 6 of dissolving.
After the flocculating agent is added into the sewage, most of flocculate generated can float to the surface of the main air flotation tank 1, the flocculate floating on the surface of the sewage is generally removed by an external slag scraping component in the prior art, and the flocculate removing rate of the main air flotation tank 1 can generally reach 65-90 percent, so that the flocculate content in the auxiliary air flotation tank 2 is 10-35 percent of that before the flocculate treatment. Since the concentration of flocs in the sewage in the auxiliary flotation tank 2 is lower than that in the main flotation tank 1, the amount of dissolved air required for a unit volume of sewage in the auxiliary flotation tank 2 is smaller than that required for a unit volume of water in the main flotation tank 1. For example, when the volume of the sub-air flotation tank 2 is 10% of the volume of the main air flotation tank 1, and the amount of the dissolved air in the sub-dissolved air tank 7 is 5% of the amount of the dissolved air in the main dissolved air tank 6, the sub-air flotation tank 2 may have a flocculation removal rate close to that of the main air flotation tank 1. In the present invention, since the floc content in the secondary flotation tank 2 is low, it is only necessary to maintain the air dissolution rate of the secondary dissolved air tank 7 at a high level, and in the case where the oil content in the sewage fluctuates, that is, regardless of whether the remaining amount of flocs in the sewage discharged from the primary flotation tank 1 is 10% or 35% of the amount before the floc treatment, the secondary flotation tank 2 can always remove most of the flocs, for example, to 10% or less of the amount before the floc treatment, and the final floc removal rate is stably maintained at a high level, for example, 90% or more. The power of the main dissolved air tank 6 and the auxiliary dissolved air tank 7 does not need to be controlled in real time, and the working pressure of the main dissolved air tank 6 is avoided being overlarge. In the present invention, the equipment investment for the auxiliary air flotation tank 2 and the auxiliary dissolved air tank 7 is not large. The invention has the advantages of simple control of the main dissolved air tank 6 and the auxiliary dissolved air tank 7, stable operation load and stable floc clearance rate. The anaerobic fermentation tank 3, the aerobic fermentation tank 4 and the sedimentation tank 5 are respectively used for removing other pollution components in the sewage.
In the preferred embodiment, the device further comprises an adjustable output pipe 8, and a controller and a concentration detector which are electrically connected with each other; concentration detectors are arranged in the main air flotation tank 1 and the auxiliary air flotation tank 2 and are used for detecting the concentration of flocculate; the adjustable output pipe 8 is communicated with the main dissolved air tank 6, the dissolved air quantity of the adjustable output pipe 8 is 5-25% of the total output quantity of the main dissolved air tank 6 during working, the adjustable output pipe 8 is a hose, the adjustable output pipe 8 is connected with a manipulator, and the manipulator is electrically connected with the controller; when the difference value between the concentration in the main air flotation tank 1 and the concentration in the auxiliary air flotation tank 2 detected by the concentration detector is smaller than a preset threshold value a, the controller controls the manipulator to move above the main air flotation tank 1, and the adjustable output pipe 8 can convey sewage to the main air flotation tank 1; when the difference value between the concentration in the main air flotation tank 1 and the concentration in the auxiliary air flotation tank 2 detected by the concentration detector is greater than a preset threshold value b, the controller controls the manipulator to move so that the manipulator moves above the auxiliary air flotation tank 2, and the adjustable output pipe 8 can convey sewage to the auxiliary air flotation tank 2; a is smaller than b. The principle of this embodiment is that, the concentration detector detects the concentration in main air supporting pond 1 and the difference of the concentration in vice air supporting pond 2 is less than predetermined threshold value a, explains that flocculate concentration in main air supporting pond 1 is lower, communicates adjustable output tube 8 and main air supporting pond 1 this moment, accomplishes flocculate through main air supporting pond 1 and clears away work, and vice dissolved air jar 7 can shut down the machine and wait, the energy saving consumed the festival. When the difference between the concentration in the main air flotation tank 1 and the concentration in the auxiliary air flotation tank 2 detected by the concentration detector is greater than a preset threshold value b, the flocculation concentration in the main air flotation tank 1 is over-high, at the moment, the adjustable output pipe 8 is communicated with the auxiliary air flotation tank 2, the flocculation concentration in the main air flotation tank 1 is reduced, the main dissolved air tank 6 is prevented from being blocked, and the overall flocculation removal rate is improved through the auxiliary air flotation tank 2. When the floc concentration in the main flotation tank 1 rises to within 25%, the floc content in the sewage discharged from the sub flotation tank 2 can be kept stable by maintaining the power of the sub dissolved air tank 7 at a high level, for example, 35% of the dissolved air amount in the main dissolved air tank 6. In the embodiment, the value range of a is 10-50mg/L, and the value range of b is 50-200 mg/L.
In a further preferred embodiment, the controller is electrically connected with the secondary dissolved air tank 7, when the concentration of flocculates in the secondary air flotation tank 2 detected by the concentration detector is lower than a preset threshold value C, the controller controls the secondary dissolved air tank 7 to stop, and when the concentration of flocculates in the secondary air flotation tank 2 detected by the concentration detector is greater than or equal to the preset threshold value C, the controller controls the secondary dissolved air tank 7 to work. The embodiment has the advantages of being beneficial to energy conservation, and simultaneously, the effect of stable content of the sewage flocculate can be achieved by using a simple control method. The value range of c is 5-30 mg/L.
In the preferred embodiment, the manipulator comprises a clamping jaw 9 and a power reducing mechanism 10, the power reducing mechanism 10 is used for driving the clamping jaw 9 to extend or shorten, and the clamping jaw 9 is connected with the adjustable output pipe 8; the power mechanism 10 that contracts is connected with slider 11, is connected with track 12 and translation power mechanism 13 on the slider 11, and translation power mechanism 13 is connected with track 12, and translation power mechanism 13 can drive slider 11 along the track removal, and track 12 is located the side of main air supporting pond 1 and vice air supporting pond 2, and translation power mechanism 13 and the power mechanism 10 that contracts all are connected with the controller electricity. The present embodiment is one of the embodiments for realizing the respective communication between the adjustable output pipe 8 and the main flotation tank 1 and the auxiliary flotation tank 2 at different time periods, and has the advantage of simple structure and control. After the translation power mechanism 13 drives the sliding block 11 to translate along the track 12, the position of the clamping claw 9 can be switched between the upper part of the main air flotation tank 1 and the upper part of the auxiliary air flotation tank 2, and after the contraction power mechanism 10 drives the clamping claw 9 to extend or contract, the tail end of the adjustable output pipe 8 can sink into the main air flotation tank 1 or the auxiliary air flotation tank 2.
In some embodiments, the air floatation device further comprises a pretreatment tank 14, a buffer channel 15 is arranged in the main air floatation tank 1, the main air floatation tank 1 is in a cube shape, the buffer channel 15 is arranged at one edge of the main air floatation tank 1, a water inlet is arranged at the upper part of the buffer channel 15, the water inlet is communicated with the pretreatment tank 14, the water flow direction in the buffer channel 15 is from top to bottom, and the water flow flows into the main body of the main air floatation tank 1 from the lower part of the buffer channel 15; a first air floatation outlet 16 is arranged at the lower part of the side wall of the main air floatation tank 1, the first air floatation outlet 16 and the buffer channel 15 are positioned on the same diagonal line of the main air floatation tank 1, and water flows into the auxiliary air floatation tank 2 from the first air floatation outlet 16; a second air floatation outlet 17 is arranged at the lower part of the side wall of the auxiliary air floatation tank 2, the second air floatation outlet 17 and the first air floatation outlet 16 are positioned on the same diagonal line of the auxiliary air floatation tank 2, and water flows out of the auxiliary air floatation tank 2 from the second air floatation outlet 17; the water flow direction in the anaerobic fermentation tank 3 is from bottom to top, an auxiliary buffer channel 41 is arranged in the aerobic fermentation tank 4, the upper part of the auxiliary buffer channel 41 is communicated with the anaerobic fermentation tank 3, the lower part of the auxiliary buffer channel 41 is communicated with the main body of the aerobic fermentation tank 4, the water flow direction in the auxiliary buffer channel 41 is from top to bottom, and the water flow direction in the aerobic fermentation tank 4 is from bottom to top. The process that sewage is discharged downwards in the buffer channel 15 is beneficial to improving the vertical flow velocity of the sewage, mutual collision of flocculates and improvement of the flocculation reaction degree of the sewage, so that the size of flocculates generated by flocculation is larger, and the floating of the flocculates is facilitated; meanwhile, the horizontal speed of the sewage in the buffer passage 15 is small, the speed of the sewage moving horizontally in the main air floating pool 1 is limited, and flocculates in the main air floating pool 1 have enough time to float to the top of the main air floating pool 1, so that the clearance rate of the flocculates is improved. In this embodiment, the flow of sewage need not to rely on the water pump of peripheral hardware, and sewage can flow under hydraulic pressure's effect.
In some embodiments, the system further comprises a slag groove 18, the slag groove 18 is arranged between the main air flotation tank 1 and the auxiliary air flotation tank 2, the bottom of the slag groove 18 is hermetically connected with a lower baffle plate 19, and the first air flotation outlet 16 is arranged on the lower baffle plate 19; the middle part of sediment groove 18 is equipped with overhead gage 20, and the top of overhead gage 20 is higher than the height of main air supporting pond 1 height and vice air supporting pond 2, and the left part of sediment groove 18 and the upper portion intercommunication of main air supporting pond 1, the right part of sediment groove 18 and the upper portion intercommunication of vice air supporting pond, the bottom intercommunication of sediment groove 18 has slag discharging pipe 21, and slag discharging pipe 21's outer end is located outside main air supporting pond 1 and the vice air supporting pond 2. The slag groove 18, the main air flotation tank 1 and the auxiliary air flotation tank 2 in the embodiment have the advantage of simple structure. The upper baffle 20 is used for preventing the sewage at the left part of the slag chute 18 and the sewage at the right part from mixing with each other.
In a further preferred embodiment, the device further comprises a residue scraping assembly, the residue scraping assembly comprises a power mechanism 22, a main scraping plate 23 and an auxiliary scraping plate 24, the power mechanism 22 is used for driving the main scraping plate 23 and the auxiliary scraping plate 24 to move, the main scraping plate 23 is arranged on the main air flotation tank 1, the auxiliary scraping plate 24 is arranged on the auxiliary air flotation tank 2, the main scraping plate 23 can scrape flocculates on the main air flotation tank 1 into the residue groove 18, and the auxiliary scraping plate 24 can scrape flocculates on the auxiliary air flotation tank 2 into the residue groove 18. Specifically, the power mechanism 22 may be connected with a chain wheel, the chain wheel is connected with a chain, the main scraper 23 and the auxiliary scraper 24 are respectively connected to two different chains, and the chain wheel drives the chains to operate to drive the main scraper 23 and the auxiliary scraper 24 to move.
In some embodiments, the upper part of the sedimentation tank 5 is communicated with a sewage discharge pipeline 51, the middle part of the sedimentation tank 5 is communicated with a recovery pipeline 52, and the recovery pipeline 52 is communicated with the aerobic fermentation tank 4. The sewage precipitated in the sedimentation tank 5 can be directly discharged, and the recovery pipeline 52 can recover the aerobic bacteria precipitated in the sedimentation tank into the aerobic fermentation tank 4.
The features of the embodiments and embodiments described above may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "length," "upper," "lower," "top," "bottom," "inner," "outer," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A sewage treatment system is characterized in that: the device comprises a main air flotation tank, an auxiliary air flotation tank, an anaerobic fermentation tank, an aerobic fermentation tank and a sedimentation tank which are sequentially communicated, and further comprises a main dissolved air tank and an auxiliary dissolved air tank, wherein the main air flotation tank is communicated with the main dissolved air tank, the auxiliary air flotation tank is communicated with the auxiliary dissolved air tank, the volume of the auxiliary air flotation tank is 10-35% of that of the main air flotation tank, and the dissolved air amount of the auxiliary dissolved air tank is 5-35% of that of the main dissolved air tank; the device also comprises an adjustable output pipe, a controller and a concentration detector which are electrically connected with each other; the concentration detectors are arranged in the main air flotation tank and the auxiliary air flotation tank and are used for detecting the concentration of flocculate; the adjustable output pipe is communicated with the main dissolved air tank, the air displacement of the adjustable output pipe is 5-25% of the total output quantity of the main dissolved air tank during working, the adjustable output pipe is a hose, the adjustable output pipe is connected with a manipulator, and the manipulator is electrically connected with the controller; when the difference value between the concentration in the main air flotation tank and the concentration in the auxiliary air flotation tank detected by the concentration detector is smaller than a preset threshold value a, the controller controls the manipulator to move above the main air flotation tank, and the adjustable output pipe can convey sewage to the main air flotation tank; when the difference value between the concentration in the main air flotation tank and the concentration in the auxiliary air flotation tank detected by the concentration detector is greater than a preset threshold value b, the controller controls the manipulator to move above the auxiliary air flotation tank, and the adjustable output pipe can convey sewage to the auxiliary air flotation tank; said a is less than said b.
2. The wastewater treatment system according to claim 1, wherein: when the concentration of flocculates in the secondary air floatation tank detected by the concentration detector is lower than a preset threshold value C, the controller controls the secondary air dissolving tank to stop, and when the concentration of flocculates in the secondary air floatation tank detected by the concentration detector is larger than or equal to the preset threshold value C, the controller controls the secondary air dissolving tank to work.
3. The wastewater treatment system according to claim 1, wherein: the manipulator comprises a clamping jaw and a power reducing mechanism, the power reducing mechanism is used for driving the clamping jaw to extend or shorten, and the clamping jaw is connected with the adjustable output pipe; the air floatation mechanism is characterized in that a sliding block is connected to the shrinkage power mechanism, a rail and a translation power mechanism are connected to the sliding block, the translation power mechanism is connected to the rail, the translation power mechanism can drive the sliding block to move along the rail, the rail is arranged beside the main air floatation tank and the auxiliary air floatation tank, and the translation power mechanism and the shrinkage power mechanism are electrically connected with the controller.
4. The wastewater treatment system according to claim 1, wherein: the device comprises a main floatation tank and a pretreatment tank, wherein a buffer channel is arranged in the main floatation tank, the main floatation tank is cubic, the buffer channel is arranged at one edge of the main floatation tank, a water inlet is formed in the upper part of the buffer channel and is communicated with the pretreatment tank, the direction of water flow in the buffer channel is from top to bottom, and the water flow flows into a main body of the main floatation tank from the lower part of the buffer channel;
a first air floatation outlet is formed in the lower portion of the side wall of the main air floatation tank, the first air floatation outlet and the buffer channel are located on the same diagonal line of the main air floatation tank, and water flows into the auxiliary air floatation tank from the first air floatation outlet;
a second air floatation outlet is formed in the lower portion of the side wall of the auxiliary air floatation tank, the second air floatation outlet and the first air floatation outlet are located on the same diagonal line of the auxiliary air floatation tank, and water flows out of the auxiliary air floatation tank from the second air floatation outlet; the rivers direction in the anaerobic fermentation pond is from the bottom up, be equipped with vice buffering passageway in the aerobic fermentation pond, the upper portion of vice buffering passageway with the anaerobic fermentation pond intercommunication, the lower part of vice buffering passageway with the main part intercommunication of aerobic fermentation pond, the rivers direction in the vice buffering passageway is from the top down, the rivers direction in the aerobic fermentation pond is from the bottom up.
5. The wastewater treatment system according to claim 4, wherein: the slag tank is arranged between the main air floatation tank and the auxiliary air floatation tank, the bottom of the slag tank is hermetically connected with a lower baffle, and the first air floatation outlet is arranged on the lower baffle; the middle part in sediment groove is equipped with the overhead gage, the top of overhead gage is higher than main air supporting pond height with the height in vice air supporting pond, the left part in sediment groove with the upper portion intercommunication in main air supporting pond, the right part in sediment groove with the upper portion intercommunication in vice air supporting pond, the bottom intercommunication in sediment groove has the scum pipe, the outer end of scum pipe is located main air supporting pond with outside the vice air supporting pond.
6. The wastewater treatment system according to claim 5, wherein: still including scraping the sediment subassembly, it includes power unit, main scraper blade and vice scraper blade to scrape the sediment subassembly, power unit is used for the drive main scraper blade with vice scraper blade removes, main scraper blade is located on the main air supporting pond, vice scraper blade is located on the vice air supporting pond, main scraper blade can with flocculate on the main air supporting pond is scraped in the sediment groove, vice scraper blade can with flocculate on the vice air supporting pond is scraped in the sediment groove.
7. The wastewater treatment system according to claim 1, wherein: the upper part of the sedimentation tank is communicated with a sewage discharge pipeline, the middle part of the sedimentation tank is communicated with a recovery pipeline, and the recovery pipeline is communicated with the aerobic fermentation tank.
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