CN107698025B - Integrated sewage denitrification and dephosphorization device - Google Patents
Integrated sewage denitrification and dephosphorization device Download PDFInfo
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F3/308—Biological phosphorus removal
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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Abstract
An integrated sewage denitrification and dephosphorization device. The device is provided with a shell (1), and an annular mud-water separation area (4) formed between the shell and the shell wall of the outer layer vertical cylinder (2) is communicated with a water outlet (1 d); the inner layer vertical cylinder body (3) is positioned in the shell, the upper and lower cavity openings of the water flow ascending channel (5) of the inner cavity are respectively communicated with the upper and lower parts of the water flow downward channel (6) at the outer side of the inner layer vertical cylinder body, and the inlet of the annular mud-water separation zone is communicated with the middle and lower parts of the water flow downward channel; the sludge accumulation area (7) below the inner layer vertical cylinder is communicated with the water inlet (1 a) and the sludge discharge opening (1 b) of the bottom wall of the inner cavity of the shell; the sludge pump (8 a) in the jet aeration device (8) is communicated with the aerator (8 b) positioned at the lower part of the inner cavity of the inner layer vertical cylinder body through a pipe fitting (8 c), the ejector (8 d) on the pipe fitting is connected with the lower end of the air inlet pipe (8 e) provided with the control valve (8 f), and the inlet of the sludge pump is communicated with the sludge accumulation area. Has the characteristics of improving the treatment effect and stabilizing the operation.
Description
Technical Field
The invention relates to the technical field of sewage biological treatment, in particular to an integrated sewage denitrification and dephosphorization device.
Background
The biological sewage treatment means that organic matters, nitrogen, phosphorus, SS and other pollutants in sewage are removed by utilizing the metabolism of microorganisms, so that the sewage is purified. The necessary condition for realizing biological denitrification and dephosphorization of sewage is to create anaerobic, anoxic and aerobic environments.
The integrated gradient-free activated sludge sewage treatment device disclosed in publication No. CN104150589A and application No. 201410421119.6 structurally comprises a shell body which is a vertical cylinder body, wherein an outer layer vertical cylinder body and an inner layer vertical cylinder body are arranged in an inner cavity of the shell body, the outer layer vertical cylinder body (namely a so-called three-phase separator) is positioned at the upper part of the inner cavity of the shell body, an annular mud-water separation area is formed between the outer layer vertical cylinder body and the shell body wall, and a water outlet is formed at the upper part of the annular mud-water separation area; the inner cavity of the inner layer vertical cylinder (namely a so-called lifting cylinder) is a water flow ascending channel, the cavity at the outer side of the inner layer vertical cylinder wall is a water flow downward channel, and the upper cylinder mouth and the lower cylinder mouth of the inner layer vertical cylinder are respectively communicated with the upper part and the lower part of the water flow downward channel to form a water flow circulating channel in the shell; the annular mud-water separation area between the outer vertical cylinder wall and the shell wall is communicated with the middle part of the water flow downward channel; the middle part of the vertical wall of the shell is provided with a sewage inlet, the middle lower part of the vertical wall of the shell (namely, the lower part of the sewage inlet) is provided with a sludge outlet, the lower end of the inner cavity of the inner layer vertical cylinder is provided with an air diffuser, and the air diffuser is communicated with an air pump arranged outside the shell through an air pipeline. The treatment device utilizes the air provided by the air pump to release through the diffuser, oxygenate the sewage and form a lifting effect to enable the sewage to circularly flow in the water flow circulation channel in the shell, so as to realize sewage purification. The defects are that: 1) Because the air diffuser is positioned at the lower end of the inner cavity of the vertical inner layer cylinder, the water inlet and the sludge outlet are both arranged on the vertical wall of the shell (above the lower cone section of the shell), the water inlet and the sludge outlet are both communicated with the annular channel with downward water flow, in operation, the entered sewage and the discharged sludge are in a dynamic mixing state with the water flow flowing in the annular channel in the area, namely, no obvious high-concentration sludge accumulation area exists, and the absorption effect of the high-concentration sludge are difficult to obtain for pollutants in the sewage; secondly, the concentration of the sludge discharged from the sludge outlet is low, which is not beneficial to the subsequent sludge treatment; thirdly, the water inlet and the sludge outlet are arranged on the vertical walls of the middle part and the middle lower part of the shell, the sludge deposition and hardening phenomenon exists in the bottom area of the inner cavity of the shell, and when the components of the shell and the inner cavity are overhauled, the sludge mixture at the lower part of the inner cavity of the shell cannot be directly emptied through the discharge outlet, so that the equipment is inconvenient to maintain and overhaul. 2) Because the device singly uses air provided by an air pump as power for oxygenation to sewage, lifting water flow and flowing in a circulation channel, the contradiction between the lifting power and the oxygenation capacity exists, when the concentration of dissolved oxygen in a shell is too high along with the change of the quality and the water quantity of inflow water, the air quantity needs to be reduced, the lifting power is reduced, the circulation flow rate of sewage and the mud-water mixing effect in mixed liquid are influenced, the treatment effect is influenced, when the concentration of the dissolved oxygen in the shell is too low, the air quantity needs to be increased, the lifting power is increased, the mud-water mixing strength is enhanced when the lifting power is increased, the formation of activated sludge flocs is restricted by the overlarge mud-water mixing strength, the concentration difference of the dissolved oxygen in each area of the water flow circulation channel in the device is difficult to generate, and obvious anaerobic, anoxic and aerobic alternate environments with certain flowing time are difficult to form in the device, so that the dephosphorization effect is influenced, and the stable operation in the operation process is unfavorable. In addition, at the inlet of the lower end of the annular mud-water separation zone, the inner top point of the upper plate of the inlet covers the inner top point of the lower plate in the vertical direction, and in the operation, during the rising process of nitrogen generated by denitrification reaction, the upper plate of the inlet can guide part of nitrogen into the annular mud-water separation zone (three-phase separation zone), so that the mud-water separation effect in the separation zone is influenced, and SS removal is influenced; the water outlet of the device is directly communicated with the upper part of the annular mud-water separation zone, so that short flow of water is easily caused to influence the mud-water separation effect of the mud-water separation zone.
Disclosure of Invention
The invention aims to provide an integrated sewage denitrification and dephosphorization device which can improve the treatment effect and stably run, has the environment of activated sludge adsorption, anaerobism, aerobiotic and anoxic, can effectively remove organic matters, nitrogen, phosphorus and SS in sewage, and improves the treatment effect.
The technical solution for achieving the object of the invention is shown in fig. 1:
the invention comprises a shell 1 of a vertical cylinder;
an outer layer vertical cylinder 2 and an inner layer vertical cylinder 3 are arranged in the inner cavity of the shell 1;
an annular mud-water separation area 4 positioned at the middle upper part of the shell is formed between the shell wall of the outer vertical shell 2 and the shell wall, and the upper part of the annular mud-water separation area 4 is communicated with a water outlet 1 d;
the inner cavity of the inner layer vertical cylinder 3 is a water flow rising channel 5, the cavity at the outer side of the wall of the inner layer vertical cylinder 3 is a water flow downward channel 6, the upper cavity mouth and the lower cavity mouth of the inner cavity of the inner layer vertical cylinder 3 are respectively communicated with the upper part and the lower part of the water flow downward channel 6, namely a water flow circulating channel is formed in the shell 1, and the inlet 4a of the annular mud-water separation zone 4 at the upper part of the shell is communicated with the middle lower part of the water flow downward channel 6 at the outer side of the wall of the inner layer vertical cylinder 3;
a sludge accumulation area 7 is arranged below the lower end of the inner layer vertical cylinder 3, namely at the bottom of the inner cavity of the shell 1;
a water inlet 1a and a sludge discharge port 1b are arranged on the bottom wall of the inner cavity of the shell 1, and the water inlet 1a and the sludge discharge port 1b are respectively communicated with the sludge accumulation zone 7;
the device is provided with a jet aeration device 8, the jet aeration device 8 comprises a sludge pump 8a and an aerator 8b positioned at the middle lower part of the inner cavity of the inner layer vertical cylinder body 3, the outlet of the sludge pump 8a is communicated with the inlet of the aerator 8b through a pipe fitting 8c, the muddy water inlet of the sludge pump 8a is communicated with the sludge accumulation area 7, the pipe fitting 8c is provided with a jet aerator 8d, the air inlet of the jet aerator 8d is connected with the lower end of an air inlet pipe 8e, the upper part of the air inlet pipe 8e is provided with a control valve 8f capable of adjusting the air quantity, and negative pressure of the jet aerator in the working state sucks air from the air inlet pipe; the power provided by the sludge pump 8a in the jet aeration device 8 enables high-concentration sludge, sewage and air from the air inlet pipe 8e in the sludge accumulation zone 7 to be fully mixed by the jet aerator 8d, and the air is aerated by the aerator 8b after turbulent flow cutting to enter the upper section cavity (i.e. the aerobic zone) of the inner layer vertical cylinder 3, so that activated sludge and oxygenation are provided for treated sewage in an aerobic environment, and meanwhile, power is provided for the flow of water flow in a circulating channel.
Further is:
the aerator 8b in the jet aeration device 8 is arranged at the lower part of the inner cavity of the inner layer vertical cylinder 3, namely, a water flow channel (the upper cavity of the inner layer vertical cylinder 3) above the aerator 8b and a region with downward water flow diversion form an aerobic region acting on sewage, a water flow channel region outside the inner layer vertical cylinder 3 and connected with the tail end of the aerobic region form an anoxic region acting on sewage, a region below the aerator 8b and connected with the tail end of the anoxic region form an anaerobic region acting on sewage, the tail end of the anaerobic region is connected with the front end of the aerobic region, the sludge accumulation region 7 is arranged in the anaerobic region, namely, the aerator 8b in the jet aeration device 8 is arranged at the middle and lower part of the inner cavity of the inner layer vertical cylinder body 3, a sludge adsorption zone/an anaerobic zone, an anoxic zone and an aerobic zone which act on sewage and are connected end to end are formed in a water flow circulation channel in the shell 1, namely, the anaerobic zone is used for adsorbing high-concentration activated sludge of pollutants in sewage and realizing the repeated circulation of activated sludge adsorption/anaerobic biological reaction, aerobic biological reaction and anoxic biological reaction of sewage in the water flow circulation channel in the shell 1 outside the anaerobic, anoxic and aerobic environments which are necessary in the process of meeting the biological denitrification and dephosphorization of the sewage.
The upper part of the shell 1 is provided with an annular water collecting weir 1c, the annular water collecting weir 1c is communicated with the upper part of the annular mud-water separation zone 4, the annular water collecting weir 1c is provided with a water outlet 1d, namely the upper part of the annular mud-water separation zone 4 is communicated with the water outlet 1d through the annular water collecting weir 1 c.
The inlet 4a is positioned at the lower end of the annular mud-water separation zone 4, a member 10 connected by an upper inclined plate end and a lower inclined plate end is arranged below the inlet 4a, the lower inclined plate is obliquely arranged upwards, the upper inclined plate is obliquely arranged downwards, the outer ends of the upper inclined plate and the lower inclined plate are connected with the inner wall of the shell, the inner vertexes of the upper inclined plate and the lower inclined plate after the inner ends are connected are protruded out of the inlet 4a and positioned below the inlet 4a, and the obliquely arranged lower inclined plate can prevent nitrogen generated by denitrification in the anoxic zone below from precipitating air bubbles in water from entering the annular mud-water separation zone 4, so that the air bubbles are prevented from entering the annular mud-water separation zone 4 to affect the mud-water separation effect.
The working process principle and the function of the invention:
in the continuous operation process, the treated sewage enters a sludge aggregation area 7 at the bottom of the inner cavity of the shell 1 from the water inlet 1a and is in an anaerobic environment, the sewage in the high-concentration activated sludge and the anaerobic environment is firstly subjected to activated sludge adsorption and anaerobic environment biological treatment, the high-concentration activated sludge adsorbs pollutants in the sewage, and part of organic matters, SS and part of nitrogen and phosphorus in the sewage are removed, so that the pollutant concentration in the sewage subjected to subsequent treatment is reduced, the impact load resistance and the treatment effect of the device are correspondingly improved, meanwhile, the high-concentration activated sludge consumes the organic matters in the sewage in the anaerobic environment and releases phosphorus, the anaerobic phosphorus release reaction of the sewage biological treatment is realized, and conditions are created for the aerobic environment biological phosphorus removal in the subsequent treatment process; sewage after high-concentration sludge adsorption and anaerobic phosphorus release flows upwards under the action of the jet aeration device 8, enters an aerobic zone above the aerator 8b to carry out biological treatment of an aerobic environment, the jet aeration device 8 provides activated sludge and air, the air oxygenates and stirs the sewage and improves the concentration of the activated sludge in the aerobic zone, the sewage in the aerobic environment is fully mixed with the activated sludge, the activated sludge degrades and removes organic matters in the sewage, simultaneously carries out nitration reaction and aerobic biological phosphorus removal, and the nitration reaction converts ammonia nitrogen in the sewage into nitrate nitrogen and nitrite nitrogen, so that the organic matters, ammonia nitrogen and phosphorus in the sewage are further removed in the aerobic zone and conditions are created for denitrification in a subsequent anoxic environment; sewage treated in an aerobic environment immediately enters the anoxic zone to carry out biological treatment in the anoxic environment, activated sludge carries out denitrification reaction in the anoxic condition, and nitrate nitrogen and nitrite nitrogen are converted into nitrogen to escape from water while organic matters in the sewage are consumed, so that total nitrogen is removed and organic matters are further removed; the sludge-water mixture treated by the anoxic environment enters the annular sludge-water separation zone 4 from an inlet 4a at the lower part of the annular sludge-water separation zone 4 for sludge-water separation, namely, activated sludge is separated from sewage, SS in the sewage is removed, the separated water uniformly overflows into an annular water collecting weir 1c at the upper part of the annular sludge-water separation zone until being discharged from a water outlet, the separated activated sludge mixture sinks into a sludge collecting zone 7 of a bottom cavity of the shell, thereby realizing activated sludge backflow and forming high-concentration activated sludge in the sludge collecting zone; the air inlet quantity is regulated by a control valve 8f to be matched with the flow and the flow speed of the mud-water mixture output by the sludge pump 8a, so that the concentration of dissolved oxygen required by the operation of an aerobic zone and an anoxic zone is realized, the concentration difference of the dissolved oxygen is generated in each zone of a water flow circulation channel, an obvious anaerobic, anoxic and aerobic alternate environment with certain flowing time is formed, and sewage is circularly and repeatedly subjected to activated sludge adsorption/anaerobic biological reaction, aerobic biological reaction and anoxic biological reaction in the water flow circulation channel in the shell 1, so that the effective removal of pollutants is realized; excess sludge is discharged through the sludge discharge port 1b at regular intervals and is treated separately.
The invention has the technical effects that:
1. the invention is characterized in that the bottom of the inner cavity of the shell 1 is provided with the sludge accumulation area 7 and is positioned in the anaerobic environment area, and the water inlet 1a and the sludge discharge opening 1b which are arranged on the bottom wall of the shell are communicated with the sludge accumulation area 7, so that the entered sewage is firstly subjected to high-concentration activated sludge adsorption and anaerobic environment biological treatment, the high-concentration activated sludge adsorbs part of pollutants in the sewage, part of organic matters and SS and part of nitrogen and phosphorus in the sewage are removed, and meanwhile, the activated sludge consumes the organic matters in the water and releases phosphorus in the anaerobic environment, thereby realizing anaerobic phosphorus release reaction of sewage biological treatment, creating conditions for the subsequent treatment of aerobic environment biological phosphorus removal, reducing the pollutant concentration in the subsequent treatment sewage by the adsorption action and effect of the high-concentration activated sludge, and correspondingly improving the impact load resistance of the device and improving the sewage treatment effect; secondly, the sludge discharge port 1b is communicated with a high-concentration sludge accumulation area of the bottom cavity of the shell, the concentration of discharged sludge is high, the difficulty and the treatment cost of subsequent sludge treatment are reduced, the flow stirring effect of a sludge-water mixture of a water inlet 1a communicated with the sludge accumulation area 7 on the bottom wall of the shell and a sludge water inlet of a sludge pump 8a is realized, and the hardening phenomenon of the sludge can be avoided by periodically discharging the sludge from the bottom, so that the maintenance workload of the device can be reduced; thirdly, the mud discharging port 1b has the function of a blow-down pipe, and can directly blow down the mud-water mixture in the cavity of the shell through the mud discharging port, thereby being beneficial to the maintenance and the overhaul of equipment and improving the working efficiency of the maintenance and the overhaul of the equipment.
2. The invention is provided with the jet aeration device 8, firstly, the sludge pump 8a of the jet aeration device 8 can lift the high-concentration sludge in the sludge accumulation area to the aerobic area above the aerator 8b so as to improve the concentration of the activated sludge in the aerobic environment and the subsequent anoxic environment, thereby improving the treatment effect of sewage in the aerobic and anoxic environments; secondly, the lifted high-concentration activated sludge and sewage are fully mixed with air from an air inlet pipe 8e under the action of an ejector 8d, when the air flows through the ejector 8d, sharp transition from positive pressure to negative pressure is generated, fluid turbulence cutting and fusion effects are generated, large-particle-size sludge flocs are cut into small-particle-size sludge flocs, the specific surface area of the sludge flocs is increased, meanwhile, air containing oxygen is sucked under the action of the negative pressure, the solubility of the oxygen in the sewage is increased, and then the air is sprayed upwards to an aerobic zone by the aerator 4d, so that the mixing and flowing of the air, the sludge and the sewage are realized in the aerobic zone, the mixing and mass transfer effects of the sludge, the sewage and the air can be improved, the oxidation of the pollutants is accelerated, the removal effect of the pollutants is improved, and the removal rate of the pollutants of the sewage is improved; thirdly, a control valve 8f capable of adjusting air inflow is arranged on an air inlet pipe 8e in the jet aeration device 8, the air inflow is adjusted through the control valve 8f to be matched with the flow and the flow speed of a mud-water mixture output by the sludge pump 8a, so that the dissolved oxygen concentration required by the operation of an aerobic zone and an anoxic zone is realized, the formation of activated sludge flocs and the concentration difference of dissolved oxygen generated in each zone of a water flow circulation channel in the device are facilitated, an obvious anaerobic, anoxic and aerobic alternate environment with certain flowing time is formed, the denitrification and dephosphorization effects are improved, the stable operation of the invention is realized, and the contradiction between the lifting power and the oxygenation capacity of the air provided by an air pump singly in the background technology is overcome.
3. The lower part of the inlet 4a at the lower end of the annular mud-water separation zone 4 is provided with a member 10 connected by the upper inclined plate end and the lower inclined plate end, the lower inclined plate is obliquely arranged upwards, the upper inclined plate is obliquely arranged downwards, the inner side vertexes of the upper inclined plate and the lower inclined plate after the inner ends are connected are protruded out of the inlet 4a and are positioned below the inlet 4a, the obliquely arranged lower inclined plate can prevent nitrogen generated by denitrification reaction in the anoxic zone below from separating out bubbles formed in water from entering the annular mud-water separation zone 4, the bubbles are prevented from entering the annular mud-water separation zone 4 to influence the mud-water separation effect, and the mud-water separation effect in the annular mud-water separation zone 4 is improved.
4. The upper part of the shell 1 is provided with an annular water collecting weir 1c, the annular water collecting weir 1c is communicated with the upper part of the annular mud-water separation zone 4, the annular water collecting weir 1c is provided with a water outlet 1d, namely, the effluent of the annular mud-water separation zone 4 enters the annular water collecting weir 1c from the upper part first and is discharged from the water outlet 1d, and the annular water collecting weir 1c has a regulating function on the effluent from the annular mud-water separation zone 4, so that uniform outflow of the water can be realized, the short flow phenomenon of the effluent can be eliminated, the stability of the operation state is facilitated, the mud-water separation effect of the annular mud-water separation zone 4 is improved, and SS and other pollutants carried by the effluent are reduced, thereby improving the pollutant removal rate.
Other features and advantages of the present invention will be apparent from the following description of the embodiments.
The invention is further described below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of the structure of the scheme of the invention;
fig. 2 is a top view of fig. 1, schematically showing that the housing 1 of the vertical cylinder has a circular vertical cylinder structure;
fig. 3 shows a square vertical cylinder structure of the vertical cylinder housing 1.
Detailed Description
Referring to the drawings, the present invention includes a housing 1 which is a vertical cylinder; an outer layer vertical cylinder 2 and an inner layer vertical cylinder 3 are arranged in the inner cavity of the shell 1; the outer layer vertical cylinder body 2 is positioned in the inner cavity of the shell 1, an annular mud-water separation area 4 positioned at the middle upper part of the shell is formed between the outer layer vertical cylinder body and the shell wall, and the upper part of the annular mud-water separation area 4 is communicated with the water outlet 1 d; the inner cavity of the inner layer vertical cylinder 3 is a water flow rising channel 5, the cavity outside the wall of the inner layer vertical cylinder 3 is a water flow downward channel 6, the upper and lower cavity openings of the inner cavity of the inner layer vertical cylinder 3 are respectively communicated with the upper and lower parts of the water flow downward channel 6, namely a water flow circulating channel is formed in the shell 1, and an inlet 4a positioned at the lower end of the annular mud-water separation zone 4 at the upper part of the shell is communicated with the middle and lower parts of the water flow downward channel 6 outside the wall of the inner layer vertical cylinder; a sludge accumulation area 7 is arranged below the lower end of the inner layer vertical cylinder 3, namely at the bottom of the inner cavity of the shell 1; a water inlet 1a and a sludge discharge port 1b are arranged on the bottom wall of the inner cavity of the shell 1, and the water inlet 1a and the sludge discharge port 1b are respectively communicated with the sludge accumulation zone 7; the lower part of the outer vertical cylinder 2 is a horn-shaped structure facing the side wall of the shell 1, and an inlet 4a at the lower end of the annular mud-water separation zone 4 is formed between the lower end of the horn-shaped structure and the side wall of the shell, as shown in fig. 1.
In implementation, the shell 1 of the vertical cylinder may be a round vertical cylinder structure or a square vertical cylinder structure, when the shell 1 is a round vertical cylinder structure, the outer layer vertical cylinder 2 and the inner layer vertical cylinder 3 are preferably corresponding round structures, see fig. 2, and when the shell 1 is a square vertical cylinder structure, the outer layer vertical cylinder 2 and the inner layer vertical cylinder 3 are preferably corresponding square structures, see fig. 3.
In practice, the lower part of the shell 1 is of a lower cone structure, the sludge accumulation area 7 is positioned in an anaerobic area in the inner cavity of the lower cone structure at the lower part of the shell 1, the water inlet 1a and the sludge discharge port 1b are positioned on the bottom wall of the inner cavity of the lower cone at the lower part of the shell 1, the lower cone structure at the lower part of the shell 1 is beneficial to the accumulation of activated sludge and the increase of the concentration of the activated sludge in the sludge accumulation area, and dead angles of a water flow circulation channel in the area can be eliminated; the outer layer vertical cylinder body 2 and the inner layer vertical cylinder body 3 are respectively connected and fixed with the shell 1 through members such as rod pieces.
The lower end of the inner layer vertical cylinder body 3 is provided with a flaring-shaped structure 9 which is downward, and the structure is beneficial to reducing the influence of a muddy water inlet of the sludge pump 8a on the area outside the sludge accumulation area 7 during operation.
The device is provided with a jet aeration device 8, the jet aeration device 8 comprises a sludge pump 8a and an aerator 8b positioned at the lower part of the inner cavity of the inner layer vertical cylinder body 3, the outlet of the sludge pump 8a is communicated with the inlet of the aerator 8b through a pipe fitting 8c, the muddy water inlet of the sludge pump 8a is communicated with the sludge accumulation area 7, the pipe fitting 8c is provided with a three-way ejector 8d, the air inlet of the three-way ejector 8d is connected with the lower end of an air inlet pipe 8e, the upper part of the air inlet pipe 8e is provided with a control valve 8f capable of adjusting the air inlet amount, the negative pressure in the working state of the ejector is used for sucking air from the air inlet pipe, the flow rate of the muddy water mixture output by the sludge pump 8a is matched with the flow rate through the control valve 8f, so as to realize the dissolved oxygen concentration required by the operation of an aerobic area and an anoxic area, the high-concentration sludge and sewage in the sludge accumulation area and the air from the air inlet pipe 8e are fully mixed through the ejector 8d, the air inlet of the three-way ejector 8e is cut, and the air from the air inlet pipe 8e enters the inner layer 8e and the inner layer 3 after the air flow is fully cut, and the air flow is circulated into the inner layer of the air channel (the aerobic channel is provided for the aerobic channel and the aerobic channel is the aerobic channel at the same time; in practice, the air inlet pipe 8e can be fixed with the upper end or the top of the shell through members such as a rod piece, and the aerator 8b can be connected and fixed with the inner-layer vertical cylinder 3 through members such as a rod piece; the number and arrangement of the aerators 8b are determined according to the sectional area of the water flow rising channel 5. When the flow rate and the pollutant concentration of the sewage entering through the water inlet 1a change greatly, in the implementation, a frequency converter for adjusting the rotation speed change of a driving motor of the sludge pump 8a can be arranged, and the output flow rate and the lift of the sludge pump 8a are correspondingly changed to be matched with the adjusted air inlet quantity by changing the rotation speed of the driving motor.
The sludge pump 8a shown in fig. 1 is positioned outside the shell, and a mud water inlet of the sludge pump is communicated with the sludge accumulation zone 7 in an anaerobic environment through a sludge pipe 8 g; in implementation, the sludge pump 8a in the jet aeration device 8 may be further disposed in the sludge accumulation area 7 at the bottom of the inner cavity of the casing 1, the sludge pump 8a is a submersible sludge pump, under this structure, the muddy water inlet of the submersible sludge pump is directly communicated with the sludge accumulation area 7 in the anaerobic environment, the submersible sludge pump may be mounted at the bottom of the inner cavity of the casing 1 by adopting an auto-coupling manner, and the jet device 8d and the air inlet pipe 8e may be moved from the outside of the casing into the inner cavity of the inner layer vertical cylinder 3.
The aerator 8b in the jet aeration device 8 is arranged at the lower part of the inner cavity of the inner layer vertical cylinder 3, namely a water flow channel (the inner cavity of the upper section of the inner layer vertical cylinder 3) above the aerator 8b and a downward water flow diversion area form an aerobic area acting on sewage, a water flow channel area outside the inner layer vertical cylinder 3 and connected with the tail end of the aerobic area form an anoxic area acting on sewage, an anaerobic area acting on sewage is formed below the aerator 8b and connected with the tail end of the anoxic area, the tail end of the anaerobic area is connected with the front end of the aerobic area, and the sludge accumulation area 7 is arranged in the anaerobic area; when the lower part of the shell 1 is in a lower cone structure, the sludge accumulation zone 7 is positioned in an anaerobic zone area in the inner cavity of the lower cone structure at the lower part of the shell 1, namely an aerator 8b in the jet aeration device 8 is positioned in the structure at the lower part in the inner cavity of the inner vertical cylinder 3, and a sludge adsorption zone/anaerobic zone, an anoxic zone and an aerobic zone which act on sewage and are connected end to end are formed in a water flow circulation channel in the shell 1, namely the high-concentration activated sludge accumulated at the lower part of the anaerobic zone is used for adsorbing pollutants in sewage outside the anaerobic, anoxic and aerobic environments which are necessary in the process of meeting the so-called biological denitrification and dephosphorization of sewage, and the sewage is circularly and repeatedly subjected to the activated sludge adsorption/anaerobic biological reaction, the aerobic biological reaction and the anoxic biological reaction in the water flow circulation channel in the shell 1.
The upper part of the shell 1 is provided with an annular water collecting weir 1c, the annular water collecting weir 1c is communicated with the upper part of the annular mud-water separation zone 4, the annular water collecting weir 1c is provided with a water outlet 1d, namely the upper part of the annular mud-water separation zone 4 is communicated with the water outlet 1d through the annular water collecting weir 1c, and the effluent at the upper part of the annular mud-water separation zone 4 is discharged from the water outlet 1d after being regulated by the annular water collecting weir 1c, so that the short flow phenomenon of the effluent can be eliminated, the stability of the running state is facilitated, the mud-water separation effect of the annular mud-water separation zone 4 is improved, and SS and other pollutants carried by the effluent are reduced, thereby improving the pollutant removal rate.
The inlet 4a is positioned at the lower end of the annular sludge-water separation zone 4, a member 10 connected by an upper inclined plate end and a lower inclined plate end is arranged below the inlet 4a, the lower inclined plate is obliquely arranged upwards, the upper inclined plate is obliquely arranged downwards, the outer ends of the upper inclined plate and the lower inclined plate are connected with the inner wall of the shell, the inner vertexes of the upper inclined plate and the lower inclined plate after the inner ends are connected are protruded out of the inlet 4a and positioned below the inlet 4a, the obliquely arranged upper inclined plate can prevent nitrogen generated by denitrification in the anoxic zone below from separating out from water to form bubbles into the annular sludge-water separation zone 4, the bubbles are prevented from entering the annular sludge-water separation zone 4 to affect the sludge-water separation effect, and the upper inclined plate can smoothly guide a sludge-water mixture in the downward water flow channel 6 upwards into the sludge-water separation zone 4 and can guide sludge which is separated in the sludge-water separation zone 4 downwards into the sludge accumulation zone 7.
The implementation structural formulas described in the above specific embodiments are not all implementation structures under the technical scheme of the present invention, and other implementation structures based on the technical scheme of the present invention are all within the scope of the present invention.
Claims (6)
1. An integrated sewage denitrification and dephosphorization device comprises a shell (1) which is a vertical cylinder;
an outer layer vertical cylinder (2) and an inner layer vertical cylinder (3) are arranged in the inner cavity of the shell (1);
an annular mud-water separation area (4) positioned at the middle upper part of the shell is formed between the shell wall of the outer-layer vertical shell (2) and the shell wall, and the upper part of the annular mud-water separation area (4) is communicated with a water outlet (1 d);
the inner cavity of the inner layer vertical cylinder body (3) is a water flow ascending channel (5), the cavity at the outer side of the wall of the inner layer vertical cylinder body (3) is a water flow downward channel (6), the upper cavity mouth and the lower cavity mouth of the inner cavity of the inner layer vertical cylinder body (3) are respectively communicated with the upper part and the lower part of the water flow downward channel (6), namely a water flow circulating channel is formed in the shell (1), and the inlet (4 a) of the annular mud-water separation area (4) at the upper part of the shell is communicated with the middle lower part of the water flow downward channel (6) at the outer side of the wall of the inner layer vertical cylinder body;
the method is characterized in that:
a sludge gathering area (7) is arranged below the lower end of the inner layer vertical cylinder (3), namely at the bottom of the inner cavity of the shell (1);
a water inlet (1 a) and a sludge discharge port (1 b) are formed in the bottom wall of the inner cavity of the shell (1), and the water inlet (1 a) and the sludge discharge port (1 b) are respectively communicated with the sludge accumulation zone (7);
the device is provided with a jet aeration device (8), the jet aeration device (8) comprises a sludge pump (8 a) and an aerator (8 b) positioned at the lower part in the inner cavity of the inner layer vertical cylinder body (3), the outlet of the sludge pump (8 a) is communicated with the inlet of the aerator (8 b) through a pipe fitting (8 c), the muddy water inlet of the sludge pump (8 a) is communicated with the sludge accumulation zone (7), the pipe fitting (8 c) is provided with a jet ejector (8 d), the air inlet of the jet ejector (8 d) is connected with the lower end of an air inlet pipe (8 e), and the upper part of the air inlet pipe (8 e) is provided with a control valve (8 f) capable of adjusting the air inlet quantity;
an aerator (8 b) in the jet aeration device (8) is positioned at the middle and lower part of the inner cavity of the inner layer vertical cylinder (3), namely an anaerobic zone, an anoxic zone and an aerobic zone which act on sewage and are connected end to end are formed in a water flow circulation channel in the shell (1), and the sludge aggregation zone (7) is positioned in the anaerobic zone;
the lower part of the shell (1) is of a lower cone structure, the sludge accumulation area (7) is positioned in an anaerobic area in the inner cavity of the lower cone structure at the lower part of the shell (1), and the water inlet (1 a) and the sludge discharge port (1 b) are positioned on the bottom wall of the inner cavity of the lower cone structure at the lower part of the shell (1);
the sludge pump (8 a) in the jet aeration device (8) is arranged outside the shell (1), and a muddy water inlet of the sludge pump (8 a) is communicated with the sludge accumulation zone (7) in the anaerobic environment through a sludge pipe (8 g).
2. The integrated sewage denitrification and dephosphorization device according to claim 1, wherein: the upper part of the shell (1) is provided with an annular water collecting weir (1 c), the annular water collecting weir (1 c) is communicated with the upper part of the annular mud-water separation zone (4), the annular water collecting weir (1 c) is provided with a water outlet (1 d), namely the upper part of the annular mud-water separation zone (4) is communicated with the water outlet (1 d) through the annular water collecting weir (1 c).
3. The integrated sewage denitrification and dephosphorization device according to claim 1, wherein: the inlet (4 a) is positioned at the lower end of the annular mud-water separation zone (4), a component (10) connected by an upper inclined plate end and a lower inclined plate end is arranged below the inlet (4 a), the lower inclined plate is obliquely arranged upwards, the upper inclined plate is obliquely arranged downwards, the outer ends of the upper inclined plate and the lower inclined plate are connected with the wall of the shell, the inner side vertexes of the upper inclined plate and the lower inclined plate after the inner ends of the upper inclined plate and the lower inclined plate are connected are protruded out of the inlet (4 a) and positioned below the inlet (4 a), and the obliquely arranged lower inclined plate can prevent nitrogen generated by denitrification in the anoxic zone below from precipitating bubbles formed in water from entering the annular mud-water separation zone (4).
4. The integrated sewage denitrification and dephosphorization device according to claim 1, wherein: the lower end of the inner layer vertical cylinder body (3) is a flaring-downward horn-shaped structure (9).
5. The integrated sewage denitrification and dephosphorization device according to claim 1, wherein: the sludge pump (8 a) in the jet aeration device (8) is arranged at the bottom of the inner cavity of the shell (1) and is positioned in the sludge accumulation zone (7) in the anaerobic environment, the sludge pump (8 a) is a submersible sludge pump, and a muddy water inlet of the submersible sludge pump is directly communicated with the sludge accumulation zone (7) in the anaerobic environment.
6. An integrated sewage denitrification and dephosphorization apparatus according to any one of claims 1 to 5, characterized in that: the shell (1) of the vertical cylinder body is of a square vertical cylinder body structure or a round vertical cylinder body structure.
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| CN110002687B (en) * | 2019-04-30 | 2021-12-14 | 倍杰特集团股份有限公司 | Circulating high-efficient mark system of carrying |
| CN111138024B (en) * | 2019-06-18 | 2020-11-10 | 苏州科技大学 | Integrated vertical circulating reactor for nitrogen and phosphorus removal of sewage |
| CN111995054A (en) * | 2020-09-14 | 2020-11-27 | 兰州交通大学 | Sewage treatment device |
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