CN213771726U - HEBR integrated sewage treatment equipment - Google Patents
HEBR integrated sewage treatment equipment Download PDFInfo
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- CN213771726U CN213771726U CN202021638598.4U CN202021638598U CN213771726U CN 213771726 U CN213771726 U CN 213771726U CN 202021638598 U CN202021638598 U CN 202021638598U CN 213771726 U CN213771726 U CN 213771726U
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Abstract
The utility model discloses a HEBR integration sewage treatment device. The apparatus comprises: the first biochemical reaction area comprises at least one anoxic tank and a mixing tank, the mixing tank is arranged in the anoxic tank, and the mixing tank is used for receiving sewage and guiding the sewage to the anoxic tank; the second biochemical reaction zone comprises at least one aerobic tank, a solid-liquid separation unit and a central aerobic unit, wherein the central aerobic unit is positioned in the middle of the aerobic tank, the solid-liquid separation unit is positioned between the central aerobic unit and the side wall of the aerobic tank, sewage treated by the anoxic tank is discharged to the bottom of the aerobic tank, the central aerobic unit is used for receiving sludge-water mixed liquid rising from the bottom of the aerobic tank and guiding the sludge-water mixed liquid to the solid-liquid separation unit, sludge in the sludge-water mixed liquid entering the solid-liquid separation unit is separated from clear water under the action of gravity, and the sludge automatically flows back to the bottom of the aerobic tank under the action of self gravity. The sludge flows back into the bottom biochemical area under the action of self-gravity, no power is needed, and the energy consumption of operation is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, specifically say, relate to a HEBR integration sewage treatment device.
Background
In recent years, the existing sewage biochemical treatment method mainly comprises three major types of aerobic, facultative and anaerobic processes, wherein derivative processes such as AO, A2O or an oxidation ditch are developed according to the characteristics of the sewage biochemical treatment method, the process utilizes the assimilation decomposition and conversion action of microorganisms to remove pollutants, and simultaneously a large amount of sludge-like flocs need to be subjected to solid-liquid separation through a sludge-water separation unit arranged at the rear end of the process, so that clear water is discharged, and sludge is precipitated and reflows.
However, the following problems also exist, including: (1) the occupied area is large; (2) the equipment has multiple units and structures, complex operation conditions and high operation difficulty; (3) additional power is needed for mud-water separation and sludge backflow, and energy consumption is high; (4) the process sludge has low concentration, poor activity, weak impact resistance and unstable treatment effect. Wherein, in prior art, activated sludge in the reaction tank can be followed rivers and washed the equipment end to, and it is less to cause the activated sludge content of front end, can influence purifying effect, at this moment often can adopt the return-flow system who has power to flow back the activated sludge of end to the front end, can consume more energy consumption like this, the cost is increased.
SUMMERY OF THE UTILITY MODEL
(I) the technical problem to be solved by the utility model
The utility model provides a technical problem be: how to effectively intercept and reflux the activated sludge in the reaction tank.
(II) the technical scheme adopted by the utility model
An HEBR integrated sewage treatment plant comprising:
the system comprises a first biochemical reaction area, a second biochemical reaction area and a third biochemical reaction area, wherein the first biochemical reaction area comprises at least one anoxic tank and a mixing tank, the mixing tank is arranged in the anoxic tank, and the mixing tank is used for receiving sewage and guiding the sewage to the anoxic tank;
the second biochemical reaction area comprises at least one aerobic tank, a solid-liquid separation unit and a central aerobic unit, wherein the central aerobic unit is positioned in the middle of the aerobic tank, the solid-liquid separation unit is positioned between the central aerobic unit and the side wall of the aerobic tank, sewage treated by the anoxic tank is discharged to the bottom of the aerobic tank, the central aerobic unit is used for receiving muddy water mixed liquid rising from the bottom of the aerobic tank and guiding the muddy water mixed liquid to the solid-liquid separation unit, sludge in the muddy water mixed liquid entering the solid-liquid separation unit is separated from clear water under the action of gravity, and the sludge automatically flows back to the bottom of the aerobic tank under the action of self gravity.
Preferably, the water collecting tank is located between the flow baffle and the side wall of the aerobic tank, the flow baffle is located between the flow guide plate and the water collecting tank, and the flow guide plate, the flow baffle, the water collecting tank and the sludge reflux plate all extend in a direction parallel to the side wall of the aerobic tank; the flow guide plate with keep off and form the guiding gutter between the flow plate, keep off the flow plate with the lateral wall in good oxygen pond forms the muddy water separation zone, the mud backward flow board is fixed in the lateral wall in good oxygen pond and the downward sloping setting, the guiding gutter is arranged in with the muddy water mixed liquid water conservancy diversion that central good oxygen unit flows to the muddy water separation zone, the water catch bowl is used for collecting and discharging the clear water that forms in the muddy water separation zone, the mud backward flow board is used for collecting and backward flow the mud that forms in the muddy water separation zone.
Preferably, the solid-liquid separation unit further comprises an air guide plate, the air guide plate is connected with the bottom end of the guide plate, the air guide plate and the sludge reflux plate form reflux gaps at intervals, and the reflux gaps are used for refluxing sludge in the sludge-water separation zone to the bottom of the aerobic tank under the action of self weight.
Preferably, the air guide plate and the projection part of the sludge return plate at the bottom of the aerobic tank are overlapped.
Preferably, the top end of the flow guide plate and the top wall of the aerobic tank are arranged at intervals to form flow guide ports, the top end of the flow baffle plate is flush with the top wall of the aerobic tank, the bottom end of the flow guide plate is lower than the bottom end of the flow baffle plate, and the flow guide ports are used for guiding the muddy water mixed liquid in the central aerobic unit into the flow guide grooves.
Preferably, the solid-liquid separation unit still includes the exhaust gas reflux pipe, the exhaust gas reflux pipe along the lateral wall setting in good oxygen pond, wherein the one end of exhaust gas reflux pipe extends to the sludge reflux board, and the other end extends to in the mixing tank, the exhaust hole has been seted up on the fixed end of sludge reflux board, the exhaust hole with the inlet port intercommunication of exhaust gas reflux pipe, the bottom of sludge reflux board with the bottom interval in good oxygen pond, the exhaust gas reflux pipe is used for the backward flow the gas of sludge reflux board below gathering and the liquid of nitrifying extremely in the mixing tank.
Preferably, the first biochemical reaction zone further comprises a partition plate which is arranged in the anoxic tank to form a gallery-type passage along which sewage discharged from the mixing tank flows.
Preferably, the second biochemical reaction zone further comprises a nitrifying liquid reflux device, the nitrifying liquid reflux device comprises a nitrifying liquid collecting pipe and a nitrifying liquid reflux pipe which are connected with each other, the nitrifying liquid collecting pipe is located in the central aerobic unit, and the nitrifying liquid reflux pipe extends into the mixing tank.
Preferably, the first biochemical reaction zone further comprises an anaerobic tank, and the anaerobic tank is communicated with the anoxic tank.
Preferably, the number of the solid-liquid separation units is two, and the two solid-liquid separation units are symmetrically arranged on two sides of the central aerobic unit.
(III) advantageous effects
The utility model discloses an integration sewage treatment device for prior art, has following technological effect:
(1) the sludge-water separation area, the diversion trench and the sludge backflow seam of the integrated sewage treatment equipment are mutually separated, and the overflowing mode cannot cause interference on sludge backflow to the bottom biochemical area.
(2) Because the special structural form of the sludge reflux plate can accumulate air bubbles generated by the aeration device, the density of the air-water mixed liquid in the triangular aerobic zone is reduced, the nitrification liquid in the triangular aerobic zone can flow back to the mixing tank of the anoxic tank through the exhaust return pipe through the exhaust holes under the air stripping action formed by the density difference of the inner mixed liquid and the outer mixed liquid, the secondary utilization of air supply of the aeration mechanism is realized while the air is exhausted, the operation energy consumption is reduced, and the operation cost is saved.
(3) The sludge reflux plate has a special structural design to realize the gas stripping reflux of nitrified liquid, and the nitrified liquid stripped and refluxed to the anoxic pond can realize the change of the concentration of dissolved oxygen in the overflow direction of the gallery-type channel of the anoxic pond, so that the transition of the anoxic pond from an anoxic functional area to an anaerobic functional area is realized. In the anoxic functional zone, organic matters in the sewage are utilized to carry out denitrification reaction with the returned nitrifying liquid of the aerobic tank, so that nitrate nitrogen in the returned nitrifying liquid is removed, the adverse effect of the nitrate nitrogen on phosphorus removal in a subsequent anaerobic zone is eliminated, and the effect of nitrogen removal is achieved.
(4) The operation mode is flexible, the operation mode can be adjusted according to the quality of inlet water and the total nitrogen treatment requirement, the nitrifying liquid can flow back without power on the premise that the gas stripping and back flow nitrifying liquid of the exhaust return pipe meets the denitrification requirement, and the operation energy consumption is reduced.
(5) The special structural design that the air guide plate and the sludge guide plate are partially overlapped and staggered can effectively intercept rising bubbles generated by the aeration mechanism from entering the mud-water separation area, and ensure that the rising bubbles cannot flow into the mud-water separation area to influence the mud-water separation effect.
(6) The biochemical sewage treatment equipment can realize that the sludge flows back into the bottom biochemical area under the action of self weight, does not need power and has low running energy consumption.
(7) The integrated sewage treatment equipment has the advantages of good nitrogen and phosphorus removal effect, high treatment efficiency, strong impact load resistance and simple operation and maintenance, and can realize convenient transportation and installation through systematic integrated design.
Drawings
FIG. 1 is a functional block diagram of an integrated sewage treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of the integrated sewage treatment apparatus according to the embodiment of the present invention;
FIG. 3 is another top view of the integrated wastewater treatment facility according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a second biochemical reaction region according to an embodiment of the present invention;
FIG. 5 is a flow chart of the sewage treatment process of the integrated sewage treatment apparatus according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Before describing the HEBR integrated sewage treatment facility in detail, the functional areas of the whole facility are briefly described, as shown in fig. 1, the integrated sewage treatment facility in this embodiment includes a first biochemical reaction area 100, a second biochemical reaction area 200, a purification area 300 and a control area 400, wherein the first biochemical reaction area 100 is used for collecting external sewage and performing denitrification reaction, the second biochemical reaction area 200 is used for collecting sewage treated by the first biochemical reaction area 100, decomposing organic pollutants in the sewage and performing nitrification reaction while realizing sludge self-refluxing, the purification area 300 is used for further purifying the clean water discharged from the second biochemical reaction area 200, and the control area 400 is used for controlling devices such as an aeration system. As a preferred embodiment, the integrated sewage treatment equipment adopts a closed shell, and a plurality of baffles are arranged inside the shell to divide the internal space of the shell into different functional areas. Wherein HEBR stands for High Efficiency three-phase composite Bioreactor.
Specifically, as shown in fig. 2 and 3, the first biochemical reaction zone 100 includes at least one anoxic tank 101 and a mixing tank 102, the mixing tank 102 is disposed in the anoxic tank 101, and the mixing tank 102 is configured to receive sewage and guide the sewage to the anoxic tank 101. The second biochemical reaction zone 200 comprises at least one aerobic tank 201, a solid-liquid separation unit 202 and a central aerobic unit 203, wherein the central aerobic unit 203 is positioned in the middle of the aerobic tank 201, the solid-liquid separation unit 202 is positioned between the central aerobic unit 203 and the side wall 201 of the aerobic tank 201, the sewage treated by the anoxic tank 101 is discharged to the bottom of the aerobic tank 201, the central aerobic unit 203 is used for receiving sludge-water mixed liquid rising from the bottom of the aerobic tank 201 and guiding the sludge-water mixed liquid to the solid-liquid separation unit 202, and the solid-liquid separation unit 202 is used for discharging clear water formed after the sludge-water mixed liquid is precipitated under the action of self gravity and returning the formed sludge to the bottom of the aerobic tank 201. By arranging the solid-liquid separation unit in the aerobic tank 201, sludge backflow is realized on sludge-water mixed liquid after the reaction of the central aerobic unit 203, and the sludge-water mixed liquid can flow back only under the action of self gravity, so that additional power is not needed, and the energy consumption is reduced.
Wherein, the bottom of the aerobic tank 201 is provided with a water inlet which is used for receiving the sewage in the anoxic tank 101 to form muddy water mixed liquor. In another embodiment, a plurality of communicating pipes may be disposed at the bottom of the aerobic tank 201, and the communicating pipes are communicated with the anoxic tank 101 and used for guiding the sewage treated by the anoxic tank 101 to the bottom of the aerobic tank 201.
As a preferred embodiment, the mixing tank 102 is arranged on the inner wall of the anoxic tank 101, the outlet of the mixing tank 102 is 200-500 mm higher than the effective liquid level of the anoxic tank 101, the bottom of the mixing tank 102 is 50-200mm away from the bottom of the anoxic tank 101, the inner wall of the anoxic tank 101 is provided with a water inlet 103, the water inlet is communicated with the mixing tank 102, and sewage enters the mixing tank 102 through the water inlet and is discharged into the anoxic tank 101 from the mixing tank 102.
Further, the first biochemical reaction zone 100 further comprises a partition plate 104, the partition plate 104 is disposed in the anoxic tank 101 to form a gallery-type channel 105 (as shown by arrows), and sewage discharged from the mixing tank 102 flows along the gallery-type channel 105, so that the flow path of the water flow can be relatively prolonged, short flow is avoided, and the sewage has a longer contact time with activated sludge in the anoxic tank. In other embodiments, the partition 104 may be provided in a plurality, and spaced apart from the anoxic tank 101 to form gallery-type passages 105 of different lengths.
Furthermore, the bottom of the anoxic tank 101 is also provided with a perforated aeration pipe 106, and the perforated aeration pipe 106 is used for carrying out interval aeration, so that the sewage mixed liquor can be ensured to be fully contacted with the activated sludge in the anoxic tank 101 under the action of aeration mixing, and the denitrification reaction is promoted to be carried out. As a preferred embodiment, the anaerobic tank can be internally provided with filler which can effectively enhance the denitrification and denitrification effects, and the filler comprises combined filler, three-dimensional filler, soft filler, semi-soft filler, suspended filler and the like.
In another embodiment, the first biochemical reaction zone 100 further comprises an anaerobic tank (not shown), which is in communication with the anoxic tank 101. The anaerobic tank can be arranged at the front end or the rear end of the anoxic tank 101, and the position relationship between the anoxic tank 101 and the anaerobic tank is determined according to the requirements of the treatment process.
Further, the anoxic tank 101 is communicated with the aerobic tank 201 through a connecting pipe, that is, sewage in the anoxic tank 101 flows into a water inlet at the bottom of the aerobic tank 201 through the connecting pipe, so as to enter an aerobic zone at the bottom of the aerobic tank 201.
As a preferred embodiment, as shown in fig. 3 and 4, the number of the solid-liquid separation units 202 is 2, two groups of the solid-liquid separation units 202 are symmetrically arranged at two sides of the central aerobic unit 203, the structures of the two groups of the solid-liquid separation units 202 are completely the same, and only one group of the solid-liquid separation units 202 is described in the present embodiment. Of course, in other embodiments, the number of solid-liquid separation units 202 may be multiple sets, and is not limited to two sets.
Specifically, the solid-liquid separation unit 202 includes a flow guide plate 202a, a flow baffle plate 202b, a water collection tank 202c and a sludge recirculation plate 202d, the flow guide plate 202a, the flow baffle plate 202b and the water collection tank 202c are arranged at intervals and sequentially far away from the central aerobic unit 203, that is, the water collection tank 202c is located between the flow baffle plate 202b and the side wall 201a of the aerobic tank 201, the flow baffle plate 202b is located between the flow guide plate 202a and the water collection tank 202c, and the flow guide plate 202a, the flow baffle plate 202b, the water collection tank 202c and the sludge recirculation plate 202d all extend along a direction parallel to the side wall 201a of the aerobic tank 201. In a preferred embodiment, both ends of the flow guide plate 202a, the flow baffle plate 202b, the water collection tank 202c, and the sludge recirculation plate 202d are fixed to the front baffle plate 201b and the rear baffle plate 201c of the aerobic tank, respectively, but the flow guide plate 202a, the flow baffle plate 202b, the water collection tank 202c, and the sludge recirculation plate 202d may be fixed in other manners, which is not limited.
Furthermore, a diversion trench 202e is formed between the diversion plate 202a and the flow baffle plate 202b, the flow baffle plate 202b and the side wall of the aerobic tank 201 form a sludge-water separation zone, the sludge return plate 202d is fixed on the side wall of the aerobic tank and is arranged in a downward inclination manner, the diversion trench 202e is used for diverting the sludge-water mixed liquid flowing out from the central aerobic unit 203 into the sludge-water separation zone, the water collection trench 202c is used for collecting and discharging clear water formed in the sludge-water separation zone, and the sludge return plate 202d is used for collecting and returning sludge formed in the sludge-water separation zone. Wherein, the water collecting groove 202c adopts a triangular water collecting groove weir groove.
As a preferred embodiment, the solid-liquid separation unit 202 further comprises an air guide plate 202f, the air guide plate 202f is connected with the bottom end of the flow guide plate 202a, the air guide plate 202f is deviated from the central aerobic unit 203 and is inclined downwards, the air guide plate 202f and the sludge reflux plate 202d are spaced to form a reflux slit 202g, and the reflux slit 202g is used for refluxing sludge formed in the sludge-water separation zone to the bottom of the aerobic tank 201 under the action of self weight. The bottom end of the sludge return plate 202d extends toward the air guide plate 202f, and forms a return gap 202g with the air guide plate 202 f. In another embodiment, the bottom end of the air guide plate 202f extends toward the sludge recirculation plate 202d, and the bottom end of the air guide plate 202f is spaced apart from the sludge recirculation plate 202d to form a recirculation gap 202 g.
Further, the top end of the flow guide plate 202a and the top wall of the aerobic tank 201 are arranged at an interval to form a flow guide opening, the top end of the flow baffle plate 202b is flush with the top wall of the aerobic tank 201, the height of the bottom end of the flow guide plate 202a is lower than the height of the bottom end of the flow baffle plate 202b, and the flow guide opening is used for guiding the muddy water mixed liquid in the central aerobic unit 203 into the flow guide groove 202 e.
Further, the projection of the air guide plate 202f and the sludge reflux plate 202d on the bottom of the aerobic tank partially overlap, and the height of the bottom end of the air guide plate 202f is higher than that of the bottom end of the sludge reflux plate 202 d.
The solid-liquid separation unit 202 further comprises a gas return pipe 202h, the gas return pipe 202h is located along the side wall of the aerobic tank 201, one end of the gas return pipe 202h extends to the sludge return plate 202d, the other end of the gas return pipe extends to the mixing tank 102, an exhaust hole is formed in the fixed end of the sludge return plate 202d and communicated with an air inlet of the gas return pipe 202h, and the gas return pipe 202h is used for collecting gas and nitrified liquid gathered below the sludge return plate 202d into the mixing tank 102. After the sludge-water mixed liquid undergoes biochemical reaction in the aerobic zone in the upflow process, the nitrified liquid accumulated at the bottom of the sludge return plate can be collected in the exhaust return pipe 202h through the air stripping effect and flows back to the mixing tank 102.
The second biochemical reaction zone 200 further comprises an aeration unit 205, wherein the aeration unit 205 is arranged at the bottom of the aerobic tank 201, and the aeration unit 205 is used for inputting dissolved oxygen into the aerobic tank 201. The aeration unit 205 can adopt the forms of microporous aeration disc, tubular aerator or perforated aeration pipe aeration, etc., and can provide dissolved oxygen needed by microorganisms and simultaneously ensure the fluidization state of activated sludge and the sludge-water contact effect in the aerobic tank.
The second biochemical reaction zone 200 further comprises a nitrifying liquid reflux device, the nitrifying liquid reflux device comprises a nitrifying liquid collecting pipe 206 and a nitrifying liquid reflux pipe 207 which are connected with each other, the nitrifying liquid collecting pipe 206 is positioned in the central aerobic unit 203, and the nitrifying liquid reflux pipe 207 extends into the mixing tank 102.
Illustratively, the sludge-water mixed liquor gradually flows upwards from the bottom aerobic zone to the central aerobic unit 203, organic pollutants in the sewage can be decomposed into carbon dioxide and water by microorganisms in the ascending process, and nitrifying bacteria convert ammonia nitrogen in the sewage into nitrate nitrogen through nitrification. Wherein, the nitrifying liquid collecting pipe 206 collects nitrifying liquid and returns to the mixing tank 102 through the nitrifying liquid return pipe 207. The nitrifying liquid reflux device comprises a gas stripping reflux mode and a power reflux mode, and nitrifying liquid quantitatively flows back into the anoxic tank 101 from the nitrifying liquid reflux device according to the treatment requirement in proportion to complete denitrification so as to achieve the aim of denitrification. Furthermore, the central aerobic unit 203 can be provided with biological fillers, which can effectively remove organic pollution, and the biological fillers can be combined fillers, three-dimensional fillers, soft fillers, semi-soft fillers, suspended fillers and the like.
Further, the slurry-water mixed liquid flowing up to the central aerobic unit 203 enters the diversion trench 202e through the diversion port, and enters the slurry-water separation zone through the diversion trench 202e, and the diversion plate 202a and the flow baffle plate 202b are arranged in parallel at an interval and are perpendicular to the bottom of the aerobic tank 201. The bottom end of the flow baffle 202b is 50-500 mm higher than the bottom end of the flow baffle 202a, so that the slurry-water mixed liquid flowing out of the flow guide groove 202e can be buffered, and the influence on the slurry-water separation effect due to the interference of the mixed liquid at the lower layer of the flow baffle 202b can be avoided.
As a preferred embodiment, the included angle between the sludge guide plate 202d and the normal of the inner wall of the aerobic tank 201 is 30-70 degrees; the included angle between the air guide plate 202f and the extension line of the guide plate 202a facing the bottom of the aerobic tank is 20-60 degrees.
The sludge guide plate 202d and the side wall and the bottom of the aerobic tank 201 form a triangular aerobic zone, bubbles generated by the aeration unit 205 in the aeration process are accumulated in the triangular aerobic zone, and the accumulated bubbles are discharged into the exhaust gas return pipe 202h through the exhaust hole of the sludge return plate 202d and flow back to the mixing tank 102 of the anoxic tank 101 through the exhaust gas return pipe 202 h.
Furthermore, due to the special structural form of the sludge reflux plate 202d, the density of the gas-water mixed liquid in the triangular aerobic zone is reduced, the air stripping effect formed by the density difference of the internal mixed liquid and the external mixed liquid can enable the nitrifying liquid in the triangular aerobic zone to enter the exhaust reflux pipe 202h through the exhaust holes and to reflux to the mixing tank 102 of the anoxic tank 101 through the exhaust reflux pipe 202h, the nitrifying liquid and the sewage in the mixing tank 102 are uniformly mixed and then enter the anoxic tank 101, the nitrifying liquid is refluxed while exhausting, the reflux amount of the nitrifying liquid can be effectively reduced by secondary utilization of the air supply of the aeration system, the operation energy consumption is saved, and the operation cost is reduced.
Further, due to the special structure of the sludge reflux plate 202d, the gas stripping reflux of the nitrified liquid is realized, and the gas stripping nitrified liquid refluxed to the anoxic tank 201 can enable the concentration of dissolved oxygen to change in sequence in the flow direction of the gallery type channel 105 in the anoxic tank 101, so that the transition from an anoxic functional area to an anaerobic functional area in the anoxic tank 101 is realized. In the anoxic functional zone, organic matters in the sewage are utilized to carry out denitrification reaction with the reflux nitrifying liquid of the aerobic tank, so that nitrate nitrogen in the reflux nitrifying liquid is removed, the adverse effect of the nitrate nitrogen on phosphorus removal of the subsequent anaerobic functional zone is eliminated, and the effect of nitrogen removal is achieved. In the anaerobic functional area, activated sludge releases phosphorus anaerobically to synthesize PHB (poly beta-phosphorus butyrate). In the aerobic tank 201, organic pollutants are decomposed into carbon dioxide and water by microorganisms in the filler or sludge; PHB aerobic decomposition, phosphorus-accumulating bacteria proliferation and phosphorus absorption, the phosphorus absorption amount in the stage is far larger than the release amount of phosphorus in an anaerobic zone, and sludge for absorbing phosphorus is discharged in the form of excess sludge so as to achieve the purpose of phosphorus removal; nitrifying bacteria in the aerobic tank 201 convert ammonia nitrogen in the sewage into nitrate nitrogen through nitrification, nitrify the nitrate nitrogen and return the nitrate nitrogen to the anoxic tank 101, and the nitrate nitrogen is converted into nitrogen through denitrification of denitrifying bacteria to be removed.
Furthermore, the sludge-water mixed liquid after the full contact reaction in the bottom aerobic zone gradually flows up to the central aerobic unit 203, the sludge-water mixed liquid enters the sludge-water separation zone from the flow guide groove 202e, the activated sludge entering the sludge-water separation zone descends under the action of gravity to realize the separation of sludge and water, the sludge flows back into the bottom aerobic zone of the aerobic tank 210 through the backflow gap 202g, and the sludge-water separation zone can realize the sludge-water separation and the sludge self-backflow so as to maintain the sludge concentration in the biochemical reaction zone and save the sludge backflow device and the operation energy consumption.
The sludge-water separation zone can be in various different realization forms, including a common precipitation separation form, and the solid-liquid separation is realized only by the gravity reflux of the sludge; the sludge-water separation area can also be internally provided with filter material fillers to strengthen the sludge-water separation effect, and the filter material fillers comprise at least one of fiber ball soft filter materials, activated carbon modified sponge filter materials, inclined tubes and inclined plate fillers.
Specifically, the purification zone 300 of the present embodiment includes a flocculation unit 301 and a precipitation separation unit 302, and the clear water discharged from the solid-liquid separation unit 202 passes through the flocculation unit 301 and the precipitation separation unit 302 in sequence. The flocculation reaction unit 301 and the sedimentation separation unit 302 are arranged in parallel, and a partition plate is arranged in the middle and connected with the same wall of the second biochemical reaction zone 200. Specifically, clear water collected by the water collecting tank 202c enters the flocculation reaction unit 301 after being collected by the water collecting pipe, a perforated aeration pipe is arranged in the flocculation reaction unit 301, and the clear water and a flocculating agent are fully stirred and react to form alum floc through air disturbance. The effluent water after the reaction in the flocculation reaction unit 301 enters the precipitation separation unit 302. The sedimentation separation unit can be in various forms, including at least one form of a vertical flow sedimentation tank, a sand filter tank, a vertical flow air floatation tank and the like. Illustratively, the precipitation separation unit 302 of the present embodiment takes the form of a sand filter; particularly, a backwashing pump 401 is required to be configured for periodic backwashing to remove pollutants intercepted on the surface layer of the filter material, backwashing wastewater is discharged from an overflow port, the sand filter tank adopts single-layer or multi-layer quartz sand filter material, and clear water filtered by the sand filter tank is accumulated in a clear water tank to provide backwashing water for the sand filter tank.
An ultraviolet sterilizer 402 is arranged in the control area 400, and the water precipitated by the precipitation separation unit 302 is treated by the ultraviolet sterilizer 402 and then is discharged after reaching the standard. The back washing pump 401 is arranged in the control area 400, the control area 400 is also provided with a rotary fan 403 and a control cabinet 404, and the rotary fan 403 is used for ventilating the perforated aeration pipe 106, the aeration unit 205 and the nitrified liquid reflux device; the control cabinet 404 is used for controlling the rotary fan 403, the ultraviolet sterilizer 402, the backwash pump 401 and the like.
Further, in order to facilitate understanding of the operation of the integrated sewage treatment apparatus of the present embodiment, as shown in fig. 5, sewage treatment is described with reference to various structures: in the first process, sewage is lifted to a mixing tank of an anoxic tank by a lift pump, and is guided to the bottom of the anoxic tank by the mixing tank, and meanwhile, nitrifying liquid collected by an aerobic tank is conveyed to the bottom of the anoxic tank by a nitrifying liquid reflux device; in the second process, a perforated aeration pipe is arranged in the anoxic tank, and the sewage and the nitrifying liquid are fully contacted with the sewage and the sludge in the anoxic zone under the aeration mixing action, so that the denitrification reaction is facilitated; thirdly, guiding the sludge-water mixed liquid treated by the anoxic tank to the bottom of the aerobic tank through a connecting pipe, uniformly mixing and diffusing, decomposing organic pollutants into carbon dioxide and water by microorganisms in the aerobic tank, converting ammonia nitrogen in sewage into nitrate nitrogen through nitrification by nitrifying bacteria, returning the nitrate nitrogen to the anoxic tank through a nitrifying liquid reflux device, and converting the nitrate nitrogen into nitrogen through denitrification by denitrifying bacteria to achieve the aim of denitrification; the sludge-water mixed liquid in the aerobic tank gradually rises to the solid-liquid separation unit, the activated sludge entering the sludge-water separation zone is separated from the purified sewage under the action of gravity, and the gravity self-flows back to the aerobic zone, and the separated clear water is collected by the water outlet tank and then is discharged out of the water outlet; fifthly, guiding the gas collected by the solid-liquid separation unit to an anoxic tank mixing tank through an exhaust pipe and discharging the gas; and sixthly, the nitrified liquid is conveyed to the anoxic tank through the nitrified liquid reflux device and is uniformly mixed with the sewage to complete denitrification so as to achieve the aim of denitrification. The process is seven: clear water collected by the water outlet tank enters a flocculation reaction unit, a flocculating agent is added to perform flocculation reaction to form larger alum flocs, TP and suspended matters are further removed after the clear water is separated by the precipitation separation unit, and the separated clear water enters the clear water tank and is treated by the ultraviolet sterilization equipment to reach the standard and then is discharged.
In order to demonstrate the purification effect of the sewage treatment apparatus of the present embodiment, the water quality data of the inlet and outlet water of the sewage treatment apparatus of the present embodiment were measured, and the results are shown in table 1 below.
TABLE 1
As can be seen from the above Table 1, the clear water treated by the sewage treatment process of the embodiment can meet and exceed the first-class A standard, and can be directly discharged.
While the invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that changes in the form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a HEBR integration sewage treatment device which characterized in that includes:
the system comprises a first biochemical reaction area, a second biochemical reaction area and a third biochemical reaction area, wherein the first biochemical reaction area comprises at least one anoxic tank and a mixing tank, the mixing tank is arranged in the anoxic tank, and the mixing tank is used for receiving sewage and guiding the sewage to the anoxic tank;
the second biochemical reaction area comprises at least one aerobic tank, a solid-liquid separation unit and a central aerobic unit, wherein the central aerobic unit is positioned in the middle of the aerobic tank, the solid-liquid separation unit is positioned between the central aerobic unit and the side wall of the aerobic tank, sewage treated by the anoxic tank is discharged to the bottom of the aerobic tank, the central aerobic unit is used for receiving muddy water mixed liquid rising from the bottom of the aerobic tank and guiding the muddy water mixed liquid to the solid-liquid separation unit, sludge in the muddy water mixed liquid entering the solid-liquid separation unit is separated from clear water under the action of gravity, and the sludge automatically flows back to the bottom of the aerobic tank under the action of self gravity.
2. The HEBR integrated sewage treatment plant according to claim 1 wherein the solid-liquid separation unit comprises a flow deflector, a flow baffle, a water collection tank and a sludge recirculation plate, the water collection tank being located between the flow baffle and the side wall of the aerobic tank and the flow baffle being located between the flow deflector and the water collection tank, the flow deflector, the flow baffle, the water collection tank and the sludge recirculation plate all extending in a direction parallel to the side wall of the aerobic tank; the flow guide plate with keep off and form the guiding gutter between the flow plate, keep off the flow plate with the lateral wall in good oxygen pond forms the muddy water separation zone, the mud backward flow board is fixed in the lateral wall in good oxygen pond and the downward sloping setting, the guiding gutter is arranged in with the muddy water mixed liquid water conservancy diversion that central good oxygen unit flows to the muddy water separation zone, the water catch bowl is used for collecting and discharging the clear water that forms in the muddy water separation zone, the mud backward flow board is used for collecting and backward flow the mud that forms in the muddy water separation zone.
3. The HEBR integrated sewage treatment equipment according to claim 2, wherein the solid-liquid separation unit further comprises an air guide plate, the air guide plate is connected with the bottom end of the guide plate, the air guide plate and the sludge reflux plate are spaced to form a reflux gap, and the reflux gap is used for refluxing sludge in the sludge-water separation zone to the bottom of the aerobic tank under the action of self weight.
4. The HEBR integrated sewage treatment plant according to claim 3, wherein said air guide plate overlaps with the projection of said sludge recirculation plate at the bottom of said aerobic tank.
5. The HEBR integrated sewage treatment device according to claim 3, wherein the top end of the flow guide plate is spaced apart from the top wall of the aerobic tank to form a flow guide opening, the top end of the flow baffle plate is flush with the top wall of the aerobic tank, the bottom end of the flow guide plate is lower than the bottom end of the flow baffle plate, and the flow guide opening is used for guiding the slurry-water mixed liquid in the central aerobic unit into the flow guide groove.
6. The HEBR integrated sewage treatment device according to claim 2, wherein said solid-liquid separation unit further comprises a gas return pipe, said gas return pipe is disposed along the side wall of said aerobic tank, wherein one end of said gas return pipe extends to said sludge return plate, the other end extends to said mixing tank, said sludge return plate has an exhaust hole opened at its fixed end, said exhaust hole is communicated with the gas inlet of said gas return pipe, the bottom end of said sludge return plate is spaced from the bottom of said aerobic tank, said gas return pipe is used for returning the gas and nitrified liquid collected under said sludge return plate to said mixing tank.
7. The HEBR integrated wastewater treatment facility of claim 6, wherein said first biochemical reaction zone further comprises a partition plate disposed within said anoxic tank forming a gallery-like passage along which wastewater discharged from said mixing tank flows.
8. The HEBR integrated wastewater treatment facility according to claim 1, wherein the second biochemical reaction zone further comprises a nitrified liquid reflux device comprising a nitrified liquid collection pipe and a nitrified liquid reflux pipe connected to each other, the nitrified liquid collection pipe being located in the central aerobic unit, the nitrified liquid reflux pipe extending into the mixing tank.
9. The HEBR integrated wastewater treatment facility of claim 1 wherein the first biochemical reaction zone further comprises an anaerobic tank, the anaerobic tank being in communication with the anoxic tank.
10. The HEBR integrated sewage treatment plant according to any of the claims 1 to 9 wherein the number of said solid liquid separation units is two, and two sets of said solid liquid separation units are symmetrically arranged on both sides of said central aerobic unit.
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|---|---|---|---|
| CN202021638598.4U CN213771726U (en) | 2020-08-07 | 2020-08-07 | HEBR integrated sewage treatment equipment |
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| CN202021638598.4U CN213771726U (en) | 2020-08-07 | 2020-08-07 | HEBR integrated sewage treatment equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010499A (en) * | 2020-08-07 | 2020-12-01 | 深圳市深港产学研环保工程技术股份有限公司 | HEBR integrated sewage treatment equipment |
| CN114604970A (en) * | 2022-05-11 | 2022-06-10 | 北京博汇特环保科技股份有限公司 | Improved A2O biochemical reaction system and sewage treatment method |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010499A (en) * | 2020-08-07 | 2020-12-01 | 深圳市深港产学研环保工程技术股份有限公司 | HEBR integrated sewage treatment equipment |
| CN114604970A (en) * | 2022-05-11 | 2022-06-10 | 北京博汇特环保科技股份有限公司 | Improved A2O biochemical reaction system and sewage treatment method |
| CN114604970B (en) * | 2022-05-11 | 2022-08-12 | 北京博汇特环保科技股份有限公司 | Improved A2O biochemical reaction system and sewage treatment method |
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Effective date of registration: 20220124 Address after: 518000 Room 301, building 2, No. 31, Makan South Road, Machang community, Xili street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen sower Ecological Technology Co.,Ltd. Patentee after: Shenzhen Shenzhen Hong Kong industry university research Environmental Protection Engineering Technology Co., Ltd Address before: 518071 Building 2, environmental protection industrial park, No.31, South Road, maheng village, Xili Town, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN-HONGKONG INSTITUTION OF INDUSTRY, EDUCATION & RESEARCH ENVIRONMENTAL ENGINEERING TECHNIQUE Co.,Ltd. |