CN218579769U - Improvement AO integral type reactor - Google Patents

Abstract

The utility model discloses an improved AO integrated reactor, which comprises a reactor main body and accessory facilities, wherein the reactor main body is internally provided with an anoxic zone, an aerobic zone, a nitrifying liquid reflux zone, a mud-water separation zone, a sludge reflux zone, a sludge collection zone and a water outlet zone which are mutually communicated; the utility model discloses an anoxic zone, good oxygen district, muddy water disengagement zone break traditional level and set up the subregion mode through the partition wall, set up the three in same reactor jointly, wherein, good oxygen district is in the perpendicular top in anoxic zone, and the muddy water disengagement zone is in good oxygen district one side, compact structure, area is little. The utility model discloses a mud backward flow is direct through gravity backward flow, need not mud backward flow power device, nitrifies the liquid by high to low partial gravity backward flow, and the part is by the low power backward flow of circulating pump, energy saving and consumption reduction, and the working costs further saves.

Description

Improvement AO integral type reactor

Technical Field

The utility model relates to a sewage treatment field especially relates to an improvement AO integral type reactor.

Background

The AO (Anaerobic aerobic) process is also called Anaerobic aerobic process, is a process flow initiated in the beginning of the 80 th 20 th century, and is also called a preposed anoxic denitrification system because a denitrification reactor is placed at the head of the system, which is a widely adopted denitrification process at present.

The process flow chart is shown as the following chart: water inlet, an anoxic tank, an aerobic tank, a secondary sedimentation tank and water outlet. The AO process separately constructs an anoxic tank, an aerobic tank and a secondary sedimentation tank, namely denitrification, nitrification, BOD removal and sludge-water separation are carried out in different reactors. Raw water, returned sludge and nitrifying liquid firstly enter an anoxic tank, and denitrifying bacteria in the sludge utilize residual organic matters and returned nitrate to carry out denitrification; after denitrification reaction, the sewage enters an aerobic tank, nitrifying bacteria in the sludge convert ammonia nitrogen in the wastewater into nitrate through nitrification, simultaneously, the residual organic matters are oxidized by the aerobic bacteria, and finally, sludge-water separation is carried out through a sedimentation tank, and effluent is discharged.

The internal circulation system is arranged, the return flow of the nitrifying liquid to the denitrification pool at the front end is the main characteristic of the AO process, in addition, the process flow is simpler, the devices are less, the organic matters in the raw sewage are directly utilized as carbon sources, no additional carbon source is needed, and both the construction cost and the operation cost are lower.

Along with the expansion and development of cities, the construction land of sewage facilities is increasingly contracted, the water quality requirement of discharged water is higher and higher, and the traditional AO process can not meet the existing development requirements on the aspects of energy conservation, land conservation and efficiency improvement, and has the following defects:

(1) The anoxic tank, the aerobic tank and the sedimentation Chi Chang are respectively provided with independent tank bodies in hard partition areas by adopting partition walls, and are sequentially connected in series in the horizontal direction, so that the occupied area is large;

(2) The pool body is large and has head loss in the horizontal flow direction, the sludge return and nitrification liquid return pipelines are relatively long, the energy consumption of the equipment is high, and the internal circulation ratio must be increased for improving the denitrification efficiency, so the operating cost is increased.

(3) The larger the reflux ratio of the nitrifying liquid from the aerobic tank is, the more difficult the anoxic section keeps an ideal anoxic state, the more difficult the denitrification effect is, and the more difficult the denitrification effect is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an improvement AO integral type reactor that denitrogenation effect is better, use cost is lower.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an improved AO integrated reactor comprises a reactor main body,

an anoxic zone, an aerobic zone, a nitrifying liquid reflux zone, a sludge-water separation zone, a sludge reflux zone, a sludge collection zone and a water outlet zone which are communicated with each other are arranged in the reactor main body;

the sludge collecting area is arranged at the bottom of the reactor main body, and the bottom of the sludge collecting area is connected with a sludge pump for discharging sludge;

the anoxic zone is arranged above the sludge collecting zone, the aerobic zone is arranged above the anoxic zone, and an aerator is arranged between the aerobic zone and the anoxic zone;

the mud-water separation zone is arranged at the water outlet side of the aerobic zone, and the aerobic zone and the mud-water separation zone are separated by a partition wall;

the sludge reflux area is arranged below the sludge-water separation area and is communicated with the anoxic area, and the sludge reflux area is separated from the anoxic area by a partition wall;

the water outlet area is arranged on the other side of the mud-water separation area, is communicated with the mud-water separation area and is separated by a partition wall;

the nitrifying liquid reflux area is arranged on the opposite side of the water outlet of the aerobic area, is communicated with the aerobic area and is separated by a partition wall;

the reactor also comprises a synergistic denitrification box, a blast aeration system, a circulating pump and a sludge pump;

the blast aeration system comprises a blast blower arranged outside the reactor main body, and the blast blower is connected with an air inlet of an aerator through an air pipeline and provides compressed air for the aerobic zone;

the synergistic denitrification box is arranged in the anoxic zone;

the circulating pump is arranged on the outer side of the reactor main body, a water inlet pipe of the circulating pump is connected with the nitrification liquid reflux area, and a water outlet pipe of the circulating pump is connected with the anoxic area and extends to the middle of the bottom of the tank;

the bottom of the reactor main body is provided with a main water inlet pipe which is connected with the middle part of the tank bottom and extends to the anoxic zone.

Furthermore, in order to better collect the sludge, the side wall of the reactor body at the sludge inlet side of the anoxic zone is provided with a slope of 30-60 degrees.

Further, in order to balance each reaction zone in the reactor main body to the maximum extent, the aerator is fixed in the reactor main body through a fixing bracket, and the aerator is arranged in the reactor main body at a position 1/3 away from the bottom of the tank, so that the volume ratio of the aerobic zone to the anoxic zone is 3:1.

furthermore, the inside heavy ion microporous membrane pipe that sets up of effect denitrogenation case is as the microorganism carrier, and the bottom sets up the supporting leg.

Furthermore, two ends of the heavy ion microporous membrane tube are fixed by fixing blocks, the tube diameter is 6-8 mm, and the distance between tube centers is not less than 15mm.

Further, the distance from the top of the partition wall in the reactor main body to the highest liquid is not less than 20cm.

Furthermore, the bottom of the sludge collection area is of a V-shaped structure.

Compared with the traditional AO technology, the utility model discloses following beneficial effect has:

(1) The anoxic zone, the aerobic zone and the sludge-water separation zone break through the traditional horizontal independent arrangement mode, and are arranged in the same reactor together, wherein the aerobic zone is vertically above the anoxic zone, and the sludge-water separation zone is arranged on one side of the aerobic zone, so that the structure is compact, and the occupied area is small;

(2) Based on the structural characteristics, the sludge is directly refluxed by gravity, a sludge reflux power device is not needed, the nitrifying liquid is refluxed by gravity from high to low, and part of the nitrifying liquid is refluxed by a circulating pump at low power, so that the energy is saved, the consumption is reduced, and the operating cost is further saved;

(3) The anoxic zone is provided with the synergistic denitrification device, the semi-closed hollow box body creates a good anoxic environment, the heavy ion membrane carrier with the characteristic of easy membrane hanging is arranged in the anoxic zone and attached with a thick biological membrane to maintain the microbial quantity of the reactor, and the circulating pump and the stirrer are linked to ensure that the nitrified liquid is fully circulated, so that the synchronous nitrification and denitrification, even the shortcut nitrification and denitrification, are enhanced, and the denitrification efficiency is further improved.

Drawings

FIG. 1 is a flow diagram of a conventional AO process;

FIG. 2 is a schematic view of the improved AO integral reactor of the present invention;

FIG. 3 is a schematic structural view of the efficiency-enhancing denitriding box of the present invention;

FIG. 4 is a schematic structural view of the aerator of the present invention;

the various references in the drawings are: 10. the device comprises an anoxic zone, a 20 aerobic zone, a 30 nitrification liquid reflux zone, a 40 sludge-water separation zone, a 50 sludge-water reflux zone, a 60 sludge collection zone, a 70 water outlet zone, a 80 synergistic denitrification tank, 81 heavy ion microporous membrane pipes, 82 supporting legs, 83 fixed blocks, 90 circulating pumps, 100 sludge pumps, 111 fixed supports, 112 aerator air inlets, 120 air blowers, 130 total water inlet pipes, 301 circulating pump water outlet pipes.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, but does not constitute a limitation to the scope of the present invention.

Referring to FIGS. 2-4, an improved AO integral reactor is comprised of a reactor body and ancillary equipment, wherein,

the reactor main body can be of a steel structure or a concrete structure and comprises an anoxic zone 10, an aerobic zone 20, a nitrifying liquid reflux zone 30, a mud-water separation zone 40, a mud-water reflux zone 50, a mud collection zone 60 and a water outlet zone 70; the accessory facilities comprise a synergistic denitrification box 80, a blast aeration system, a circulating pump 90 and a sludge pump 100.

The anoxic zone 10, the aerobic zone 20, the nitrifying liquid reflux zone 30, the sludge-water separation zone 40, the sludge reflux zone 50, the sludge collection zone 60 and the water outlet zone 70 are communicated with each other and arranged in the same reactor, wherein: the sludge collecting area 60 is arranged at the bottom of the reactor main body and is of a V-shaped structure; the bottom of the sludge collection area 60 is connected with a sludge pump 100 for discharging residual sludge; the anoxic zone 10 is arranged vertically above the sludge collecting zone 60 and is communicated with the sludge collecting zone 60; a 30-60 degree slope 11 is arranged on the sludge inlet side of the anoxic zone 10, which is beneficial to discharging sludge into the sludge collecting zone 60; the aerobic zone 20 is arranged vertically above the anoxic zone 10 and is communicated with the anoxic zone 10; an aerator 110 is arranged between the aerobic zone 20 and the anoxic zone 10, and the aerobic zone 20 and the anoxic zone 10 are divided; the aerator 110 is fixed by a fixing bracket 111 and is arranged at a position about 1/3 of the distance from the bottom of the tank, so that the volume ratio of the aerobic zone 20 to the anoxic zone 10 is about 3:1; the mud-water separation zone 40 is arranged at the same side of the water outlet of the aerobic zone 20, is communicated with the aerobic zone 20 and is separated by a partition wall, and the water in the aerobic zone 20 enters the mud-water separation zone 40 in an overflow mode; the sludge reflux area 50 is arranged below the mud-water separation area 40, is communicated with the anoxic area 10 and is separated by a partition wall; the water outlet area 70 is of a rectangular structure and is communicated with the mud-water separation area 40, the middle of the water outlet area is separated by a partition wall, and water in the mud-water separation area 40 enters the water outlet area 70 in an overflow mode; the nitrifying liquid reflux area 30 is of a rectangular structure, is arranged on the opposite side of the water outlet of the aerobic area 20 and is communicated with the aerobic area 20, the middle of the nitrifying liquid reflux area is separated by a partition wall, and the distance between the top of the partition wall and the highest liquid level is not less than 20cm.

A blast aeration system is arranged outside the reactor main body, the blast aeration system comprises a blower 120, and the blower 120 is connected with an aerator air inlet 112 through an air pipeline 121 to provide compressed air for the aerobic zone 20; a circulating pump 90 is arranged on one side of the reactor main body, a water inlet pipe of the circulating pump 90 is connected with the nitrification liquid reflux zone 30, and a water outlet pipe 301 of the circulating pump is connected with the anoxic zone 10 and extends to the middle of the bottom of the tank; the bottom of the reactor is provided with a main water inlet pipe 130, and the main water inlet pipe 130 penetrates through the anoxic zone and extends to the middle of the bottom of the tank; the bottom of the anoxic zone is also provided with a stirrer 140;

a synergistic denitrification box 80 is arranged in the anoxic zone 10, the synergistic denitrification box 80 is of a semi-closed structure which is rectangular and cylindrical, has an open bottom and a round and hollowed surface, a heavy ion microporous membrane tube 81 is arranged in the synergistic denitrification box as a microorganism carrier, and supporting legs 82 are arranged at the bottom of the synergistic denitrification box; the height of the supporting legs is not less than 20cm; two ends of the heavy ion microporous membrane tube are fixed by fixing blocks 83, the tube diameter is 6-8 mm, the distance between tube cores is not less than 15mm, and the quantity and the size can be flexibly adjusted according to actual application conditions.

The working principle is as follows: the sewage firstly enters an anoxic zone of the reactor through a water inlet pipe and is fully mixed with the nitrifying liquid refluxed by a circulating pump under the action of a stirrer; the hollow semi-closed structure of the synergistic denitriding box maintains a good anoxic environment in an anoxic zone, a large amount of biological membranes are attached to heavy ion microporous membrane fillers fixed in the synergistic denitriding box, and facultative bacteria on the biological membranes live in the aerobic and anoxic environments. When molecular dissolved oxygen exists in the mixed solution, the ammoniation bacteria free the organic nitrogen to form ammonia nitrogen, and meanwhile, the denitrifying bacteria oxidize and decompose organic matters in water, and molecular oxygen is used as a final electron acceptor; under the condition of no molecular oxygen, the denitrifying bacteria use N in nitrate (N is + 5) and nitrite (N is + 3) in the reflux nitrifying liquid as an electron acceptor in energy metabolism, O (-2) as a hydrogen acceptor generates water and alkalinity, and organic matters in inlet water as a carbon source and an electron donor provide energy and are stably oxidized, so that the aim of denitrification is fulfilled.

The mixed liquid in the anoxic zone enters the aerobic zone through diffusion and suction of a circulating pump, the air blower is connected with the aerator to provide sufficient dissolved oxygen for the aerobic zone, and at the moment, the heterotrophic aerobic bacteria oxidize and decompose organic matters into water and inorganic matters by using oxygen as an electron acceptor to remove BOD in the water; nitrite bacteria and nitrifying bacteria convert ammonia nitrogen in water into nitrite nitrogen and nitrate nitrogen by using ammonia nitrogen as an electron donor and oxygen as an electron acceptor, and simultaneously, the nitrite nitrogen and the nitrate nitrogen flow back to an anoxic zone by a circulating pump to perform denitrification reaction by using partial alkalinity generated in denitrification.

The water after nitrification, denitrification and aerobic oxidation enters a mud-water separation zone in an overflow mode, the sludge enters a sludge collection zone through a sludge return zone after being subjected to gravity precipitation, and the returned sludge is discharged as residual sludge through a sludge pump.

And overflowing the water subjected to mud-water separation into a water outlet area, and optionally entering the next treatment section according to the water outlet requirement to be treated and discharged after reaching the standard.

Application the technical scheme of the utility model can solve following prior art problem:

(1) Solves the problem of occupying area in the prior art

The technical scheme of the utility model break traditional AO technology on spatial arrangement with the mode that oxygen deficiency pond, good oxygen pond, sedimentation tank independently set up in proper order in the horizontal direction, adopt the three to build the mode and combine in same reactor, wherein, good oxygen district sets up in the perpendicular top of oxygen deficiency district, by the aerator interval, the mud-water separation district sets up in good oxygen pond one side, by the water conservancy diversion wall interval, overall structure is compact, and space utilization is high, simultaneously because the application of efficiency-increasing denitrogenation case, the utility model discloses get rid of total nitrogen efficiency and improve, the volume load is big, and the reactor volume reduces, and area reduces greatly.

(2) Solves the problem of higher operating cost in the prior art

The utility model discloses an in the scheme because unique cell body setting mode, mud can be directly through gravity direct reflux to anoxic zone below, need not additionally to set up mud backward flow power device, nitrify some and pass through air water circulation and action of gravity backward flow, partly pass through circulating pump forced reflux, nitrify liquid backward flow district in anoxic zone top, circulating pump business turn over water pipeline is short, the head loss is little, can realize low power circulation, the equipment power consumption reduces, the working costs reduces.

(3) Solves the problem of limited denitrification effect in the prior art

The denitrification mainly depends on the participation of denitrifying bacteria in the reaction process of converting nitrate and nitrite into nitrogen, and the main factors influencing the denitrification efficiency are as follows: dissolved oxygen, microbial biomass and nitrifying liquid.

The utility model discloses on traditional technology basis, the semi-closed design that has increased its circular fretwork of increase denitrogenation case creates good oxygen deficiency condition, causes the interference to denitrification reaction when avoiding aerobic zone aeration, can maintain aquatic dissolved oxygen below 0.5mg, and the adnexed biomembrane rete of heavy ion microporous membrane is thicker simultaneously, and the biomembrane that is close to microporous membrane one side is inside to form the oxygen deficiency environment that has the denitrogenation fungus and suit.

The utility model discloses adopted the mud membrane composite technology in the anoxic zone, had the advantage of traditional activated sludge process and biomembrane method concurrently, the heavy ion microporous membrane that sets up in increase denitrification incasement portion is as the microorganism carrier. Compared with the common carrier filler, the carrier filler can achieve better film forming effect, and has more attached microorganisms and longer biological chain. And simultaneously, based on the utility model discloses a biochemical and integrative special construction that deposits, rivers overflow from bottom to top and go out water, and mud can subside naturally, and mud is difficult to run off along with going out water, and mud concentration mainly relies on excess sludge discharge control, can maintain the reactor and have the microorganism of certain quantity, guarantees out water quality of water.

The utility model discloses an in the scheme, nitrify liquid partly and pass through air water circulation backward flow, partly through circulating pump forced reflux, because the utility model discloses a better oxygen deficiency environment can be maintained to the reactor, and the facultative anaerobism microorganism on the biomembrane is many, compares with traditional AO technology, improves and nitrify the liquid backward flow and be unlikely to arouse the excessive competition of heterotrophic bacteria, can not cause great interference to the denitrification, and the reaction has more sufficient nitrate, including air water circulation, the circulating pump, the agitator joint linkage effect makes the reactor possess better subregion and hydraulic circulation condition, and the denitrification reaction can high-efficiently go on.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (7)

1. An improvement AO integral type reactor, includes a reactor main part, its characterized in that:

an anoxic zone, an aerobic zone, a nitrifying liquid reflux zone, a sludge-water separation zone, a sludge reflux zone, a sludge collection zone and a water outlet zone which are communicated with each other are arranged in the reactor main body;

the sludge collecting area is arranged at the bottom of the reactor main body, and the bottom of the sludge collecting area is connected with a sludge pump for discharging sludge;

the anoxic zone is arranged above the sludge collecting zone, the aerobic zone is arranged above the anoxic zone, and an aerator is arranged between the aerobic zone and the anoxic zone;

the mud-water separation zone is arranged at the water outlet side of the aerobic zone, and the aerobic zone and the mud-water separation zone are separated by a partition wall;

the sludge reflux area is arranged below the sludge-water separation area and is communicated with the anoxic area, and the sludge reflux area is separated from the anoxic area by a partition wall;

the water outlet area is arranged on the other side of the mud-water separation area, is communicated with the mud-water separation area and is separated by a partition wall;

the nitrifying liquid reflux area is arranged on the opposite side of the water outlet of the aerobic area, is communicated with the aerobic area and is separated by a partition wall;

the reactor also comprises a synergistic denitrification box, a blast aeration system, a circulating pump and a sludge pump;

the blast aeration system comprises a blast blower arranged outside the reactor main body, and the blast blower is connected with an air inlet of an aerator through an air pipeline and provides compressed air for the aerobic zone;

the synergistic denitrification box is arranged in the anoxic zone;

the circulating pump is arranged on the outer side of the reactor main body, a water inlet pipe of the circulating pump is connected with the nitrification liquid reflux area, and a water outlet pipe of the circulating pump is connected with the anoxic area and extends to the middle of the bottom of the tank;

the bottom of the reactor main body is provided with a main water inlet pipe which is connected with the middle part of the tank bottom and extends to the anoxic zone.

2. An improved AO integrated reactor as claimed in claim 1, wherein: the side wall of the reactor body at the sludge inlet side of the anoxic zone is provided with a slope of 30-60 degrees.

3. An improved AO integrated reactor as claimed in claim 1, wherein: the aerator is fixed in the reactor main body through a fixing support, and is arranged at a position 1/3 of the distance from the tank bottom in the reactor main body, so that the volume ratio of the aerobic zone to the anoxic zone is 3:1.

4. an improved AO integrated reactor as claimed in claim 1, wherein: the inside heavy ion microporous membrane pipe that sets up of effect denitrogenation case is as the microorganism carrier, and the bottom sets up the supporting leg.

5. An improved AO integrated reactor as claimed in claim 4, wherein: two ends of the heavy ion microporous membrane tube are fixed by fixing blocks, the tube diameter is 6-8 mm, and the distance between tube cores is not less than 15mm.

6. An improved AO integrated reactor as claimed in claim 1, wherein: the distance between the top of the partition wall in the nitrifying liquid reflux area and the highest liquid is not less than 30cm.

7. An improved AO integrated reactor as claimed in claim 1, wherein: the bottom of the mud collection area is of a V-shaped structure.

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