CN208916914U - A kind of reaction tank and biological sewage treatment device for Sewage Biological Treatment - Google Patents

Abstract

The utility model discloses a kind of reaction tanks and biological sewage treatment device for Sewage Biological Treatment, the reaction tank is prismatic by the length that two end faces, bottom surface and several medial surfaces end to end surround upper end opening, it is respectively set and water inlet pipe and outlet pipe on two end faces end to end, each medial surface and the inner wall of bottom surface are equipped with 17 slots, corresponding slot surrounds semi-circular, when plate is arranged inside, 18 reaction members will be divided into inside reaction tank；It is equipped with seal cover board at each reaction member upper end opening, is equipped with agitating device and vent valve on each seal cover board；Each reaction member side is equipped with bypass inlet and outlet pipes, bypasses and is equipped with valve at inlet and outlet pipes；Each reaction member bottom surface is equipped with aerator and the corresponding air inlet pipe being connected；Air inlet pipe is equipped with intake valve.The utility model reaction tank can flexibly construct a variety of biologic process for treating sewage, be suitable for different quality processing requirement.

Description

A kind of reaction tank and biological sewage treatment device for Sewage Biological Treatment

Technical field

The utility model belongs to technical field of sewage in environmental protection, in particular to one kind is applicable to different quality Multifunctional sewage biological processing unit.

Background technique

With the rapid development of social economy, the continuous expansion of the surge of town dweller's quantity and size industrial enterprises, I The discharge amount of state's town domestic sewage and industrial wastewater also cumulative year after year.All kinds of stain diseases contain a large amount of organic pollutant and The main reason for holophytic nutritions salt such as nitrogen phosphorus is that black and odorous water, eutrophication is caused to take place frequently, and water ecological environment deteriorates, it is necessary to After strictly being handled and reaching discharge standard, environment can be discharged into.

Common sewage disposal technology can be divided into physical-chemical process and bioanalysis two major classes.Because bioanalysis has wide spectrum, height The low advantage of effect, operating cost, it has also become the prefered method of sewage treatment project and facility.For different sewage water quality and processing Target, the biologic process for treating sewage with different function are also developed.Currently, the typical sewage being most widely used is raw Object treatment process includes: the traditional activated sludge process (i.e. plug-flow type active sludge method) using organic pollutant as processing target；With Organic matter removal and denitrogenation are the Anoxybiotic-aerobic biologic denitrification process (i.e. A/O biological denitrification process) of target；With organic matter removal It is the anaerobic-aerobic Biological Phosphorus Removal Processes (i.e. A/O Biological Phosphorus Removal Processes) of target with dephosphorization；With organic matter removal, denitrogenation and remove Phosphorus is anaerobic- anoxic- oxic synchronous denitrogen dephosphorus technology (the i.e. A of target²/ O synchronous denitrogen dephosphorus technology)；And in these bases The a large amount of improvement and deformation biologic process for treating sewage that developed in plinth technique.

But then, existing biological sewage treatment device often process form fix, the method for operation it is single, one suit It sets and is only able to achieve a kind of set sewage treatment function；It is difficult to adapt to the variation of water quality, water and processing requirement, in actual sewage Applicability, versatility in processing application is poor.Therefore, it is necessary to develop, one kind can be flexibly applied to different quality and processing is wanted The multifunctional sewage biological processing unit asked.

Summary of the invention

Purpose of the utility model is to solve defects existing in the prior art, provide a kind of suitable for different quality The sewage-treatment plant of processing requirement.

In order to achieve the above object, the utility model provides a kind of reaction tank for Sewage Biological Treatment, the reaction Pond by two end faces end to end, bottom surface and along its length several medial surfaces for being arranged surround upper end opening length it is prismatic, end to end It is respectively set the water inlet pipe and outlet pipe being connected with inside reaction tank on two end faces, on the inner wall of each medial surface and bottom surface Equipped with 17 slots, the corresponding slot of medial surface and bottom surface surrounds semi-circular, when plate is arranged in all semi-circular slots, 18 reaction members will be divided into inside reaction tank；Sealing cover is equipped at the corresponding reaction tank upper end opening of each reaction member Plate is equipped with agitating device and vent valve on each seal cover board；The corresponding reaction tank side of each reaction member is equipped with and react singly The bypass inlet and outlet pipes that member is connected bypass and are equipped with valve at inlet and outlet pipes；The corresponding reaction tank bottom surface of each reaction member is all provided with There are aerator and the corresponding air inlet pipe being connected；The air inlet pipe is equipped with intake valve.

By carrying out the separation of each reaction member and the setting of intake valve, vent valve to reaction tank, facilitates and carry out The differentiation in the difference biological oxidation functional response such as oxygen, anaerobism, anoxic area, to adapt to the requirement of different quality processing.It bypasses simultaneously The setting of inlet and outlet pipes is convenient to carry out reflow treatment to each reaction zone as needed.

Further, it is equipped with partition in the corresponding semi-circular slot of each reaction member in reaction tank, or at interval of two It is equipped with plate in the corresponding semi-circular slot of reaction member, or at interval of being equipped in the corresponding semi-circular slot of three reaction members Plate.By different partitions and biological oxidation type set-up mode, by the reaction zone in reaction tank be divided into 6 or 9 or 18, the Sewage Biological Treatment of different function (such as anaerobism, anoxic, aerobic) is carried out to each reaction zone.

Further, when plate is arranged in semi-circular slot, adjacent insert plates are arranged according to top and bottom interval respectively Flowing hole.By spaced flowing hole, the cross-flow of adjacent reaction area up and down direction is formed, it is short-circuit to prevent water flow, and guarantee Mixed liquor flowing is generally in ideal plug-flow state in reaction tank.

Preferably, reaction tank is in cuboid, and 17 slots being arranged in reaction tank are uniformly distributed along its length, and slot It is U-shaped.

The utility model additionally provides a kind of multifunctional sewage biological processing unit comprising above-mentioned reaction tank, this is multi-functional Biological sewage treatment device further includes secondary settling tank；Secondary settling tank is vertical-flow secondary settling tank, including upper mast cylinder and lower taper Sludge bucket；Cylindrical barrel body center is equipped with central tube；The outlet pipe of reaction tank is connected by central tube with secondary settling tank；Cylindrical barrel body Top is equipped with effluent weir.

By the setting of secondary settling tank, the mixed liquor flowed out in reaction tank is entered in secondary settling tank from top to bottom by central tube, dirty Mud is entered in lower taper sludge bucket by gravitational settling, is discharged after collecting by mud discharging mouth, and clear water rises on cylinder after precipitating End enters catch basin along effluent weir and goes out to flow.

Further, taper sludge bucket bottom is equipped with mud discharging mouth, and mud discharging mouth passes through the water inlet of sludge reflux pump and reaction tank Pipe or bypass inlet and outlet pipes are connected.Mixed liquor in reaction tank, which can be effectively supplemented, by sludge reflux pump goes out the activity dirt that stream is taken away Mud makes the sludge concentration in reaction tank keep stablizing, while also can play a role to the variation of buffering influent quality.

Further, center bottom of the tube is equipped with umbrella shape deflector.By the setting of umbrella shape deflector, so that into secondary settling tank The interior mixed liquor Uniform Flow in secondary settling tank in the horizontal direction.

Further, multifunctional sewage biological processing unit further includes oxygen charging pump；Oxygen charging pump by corresponding air hose with Corresponding aerator is connected.Aerating system is consequently formed, and aeration quantity is controlled by intake valve.

The utility model has the advantage that compared with prior art

The utility model proposes a kind of multifunctional sewage biological processing unit it is compact-sized, simple and direct, operation method is flexible, It is feature-rich, can highly extend；Without changing device overall configuration, only set by the separation of internal plate, biological function area The connection with external reflux system is set, the operation of a variety of classical sewage treatment process can be realized.Set of device can be fitted flexibly It compared with the sewage-treatment plant of traditional simple function, should be provided with extremely strong in the demand of different sewage water quality and processing target Practicability and application value.

Detailed description of the invention

Fig. 1 is the utility model biochemical reaction tank structure chart；

Fig. 2 is the utility model conventional plug-flow Activated Sludge Process operation method figure；

Fig. 3 is the utility model anoxic/aerobic (A/O) biological denitrification process operation method figure；

Fig. 4 is 2 section water-feeding As of the utility model/O biological denitrification process operation method figure；

Fig. 5 is 3 section water-feeding As of the utility model/O biological denitrification process operation method figure；

Fig. 6 is the utility model aerobic/anaerobic (A/O) Biological Phosphorus Removal Processes operation method figure；

Fig. 7 is the utility model anaerobic/anoxic/aerobic (A²/ O) synchronous denitrogen dephosphorus technology operation method figure；

Fig. 8 is the utility model UCT process operation method figure.

Specific embodiment

Below by drawings and examples, the utility model is described in further detail.

The utility model provides a kind of multifunctional sewage biological processing unit and its operation that can be suitably used for different quality Method.Apparatus main body is by biochemical reaction tank, secondary settling tank and attached oxygen charging pump 18, mixed liquor reflux pump 20 and sludge reflux pump The equipment such as 17 and connecting line are constituted.

As shown in Figure 1, biochemical reaction tank is the core of device, and it is prismatic for length, water inlet pipe 1 and water outlet are respectively set end to end Pipe 7.17 slots 5 are set along its length inside biochemical reaction tank, reaction tank can be divided into 18 by insertion plate 16 Reaction member；Adjacent plate presses upper and lower part interval setting flowing hole 19 respectively, forms the cross-flow of up and down direction, prevents water Flow short-circuit, and guarantee that mixed liquor flowing is generally in ideal plug-flow state in biochemical reaction tank.Each reaction member side is (right Answer the side-walls of reaction tank) setting bypass inlet and outlet pipes 6；Seal cover board 2 is set above each reaction member, is set on seal cover board Set dismountable agitating device 4 and vent valve 3；Dismountable aerator 8 and intake valve 9 is arranged in each reaction member bottom.

As shown in Fig. 2, secondary settling tank is vertical-flow secondary settling tank, main body is by 14 two parts structure of cylindrical barrel body 12 and taper sludge bucket At；Body centre is equipped with central tube 10, and the mixed liquor flowed out in biochemical reaction tank outlet pipe 7 enters two by central tube from top to bottom In heavy pond；Central tube lower part sets umbrella shape deflector 13, makes in central tube the mixed liquor Uniform Flow in pond in the horizontal direction；Sludge Entered in lower taper sludge bucket 14 by gravitational settling, is discharged after collecting by mud discharging mouth 15；Clear water rises to cylinder after precipitating Upper end overflows into catch basin 11 along effluent weir and goes out to flow.

Oxygen charging pump 18 connects the aerator 8 of biochemical reaction bottom of pond portion by air hose and intake valve 9, forms aeration system System, and aeration quantity is controlled by intake valve 9.

Reaction member in biochemical reaction tank can be by adjusting the state (opening or closing) of vent valve 3 on seal cover board With the state (open or close and controlled by intake valve 9) of bottom aerator 8, it is set as that there are different biological oxidation function The biochemical reaction zone of energy: being anaerobic zone when vent valve 3 and aerator 8 simultaneously close off；When vent valve 3 is opened, aerator It is anoxic zone when 8 closing；It is aerobic zone when vent valve 3 and aerator 8 are opened simultaneously.

It can be connected by mixed liquor reflux pump 20 between the bypass inlet and outlet pipes 6 of differential responses unit side, form mixed liquor Return-flow system.From aerobic zone to anoxic zone mixed liquor reflux main purpose be aerobic zone generate nitrate flow back into it is scarce Oxygen area provides nitrogen source for denitrifying bacteria, to carry out denitrification denitrogenation.Mixed liquor reflux from anoxic zone to anaerobic zone can both subtract Nitrate content in few backflow mixed liquor, weakens the denitrification of anaerobism section, reduces denitrifying bacterium to the carbon source of polyP bacteria Competition；Dissolved oxygen in phegma can again reduced, ensure that the anaerobic environment of anaerobism section, ensured anaerobic phosphorus release process into Row.

Partial sludge can be back to biochemical reaction tank by sludge reflux pump 17 by secondary settling tank sludge bucket bottom mud discharging mouth 15, Form sludge recirculation system.The main purpose of sludge reflux is that supplement reaction tank mixed liquor goes out the activated sludge that stream is taken away, and is made anti- Sludge concentration in Ying Chi keeps stablizing, while also can play a role to the variation of buffering influent quality.

When device is run, multiple adjacent reaction members can be set to identical biological treatment functional areas, and by not Congenerous section, different function area form different mixed liquor return-flow systems and sludge reflux from the connection of the pipeline between secondary settling tank System realizes all kinds of biochemical wastewater treatment process flows, to meet the sewage of different quality sewage or different quality purification target Processing needs.

It is specifically introduced below with reference to different disposal process example:

Embodiment 1:

As shown in Fig. 2, waste water of the processing containing organic pollutant or when removing dirty organic pollutants as main target, Utility model device may be configured as conventional plug-flow Activated Sludge Process.18 reaction members of biochemical reaction tank are by inserting Plate is arranged to form 6 biochemical function reaction zones, these biochemical reaction functional areas, which are all provided with, is set to aerobic zone.Sewage to be processed and by The returned sludge of secondary settling tank reflux enters from first section biochemical reaction zone.Sewage and the mixed liquor that returned sludge is formed are whole in system Body is in plug-flow state, flows through each section of aerobic reactor zone by first section aerobic reactor zone sequence, is finally entered by latter end aerobic reactor zone Secondary settling tank, after secondary settling tank mud-water separation, water outlet and excess sludge discharge system after processing, it is aerobic that returned sludge is back to first section Reaction zone.

Embodiment 2:

As shown in figure 3, processing nitrogenous effluent or when using organic pollutant and nitrogen as sewage treatment main target, this is practical newly Type device may be configured as anoxic/aerobic (A/O) biological denitrification process.18 reaction members of biochemical reaction tank are arranged by plate At 6 biochemical reaction functional areas, i.e. anoxic/anoxic/aerobic/aerobic/aerobic/aerobic.Raw sewage from first section hypoxia response area into Enter, by the returned sludge also simultaneous implantation of secondary settling tank reflux.The mixed liquor that sewage is formed with returned sludge is flowed by first section anoxic zone Enter the 2nd section of anoxic zone, then successively flow into 4 sections of aerobic zones, finally enter secondary settling tank, through secondary settling tank mud-water separation, goes out after processing Water and excess sludge discharge system, returned sludge to first segment anoxic zone.Meanwhile the aerobic zone mixed liquor containing nitrate nitrogen is by latter end Aerobic zone is back to first section anoxic zone by mixed liquor return-flow system.

Embodiment 3:

As shown in figure 4, in the raw sewage, when 5 < carbon-nitrogen ratio (COD/ total nitrogen) < 7, utility model device may be configured as 2 sections Water inlet anoxic/aerobic (A/O) biological denitrification process.18 reaction members in biochemical reaction tank are set as 6 biochemical reaction functions Area, i.e. anoxic/aerobic/aerobic/anoxic/aerobic/aerobic arrangement.Raw sewage is entered by 2 anoxic zones respectively by setting ratio System is entered by the returned sludge of secondary settling tank reflux from first section anoxic zone.Mixed liquor in system is followed by each reaction zone, by end Section aerobic zone, which goes out to flow, enters secondary settling tank, and after mud-water separation, water outlet and excess sludge discharge system, returned sludge are back to after processing First section hypoxia response area.

Embodiment 4:

As shown in figure 5, in the raw sewage, when 3 < carbon-nitrogen ratio (COD/ total nitrogen) < 5, utility model device may be configured as 3 sections Water inlet anoxic/aerobic (A/O) biological denitrification process.18 reaction members in biochemical reaction tank are set as 9 biochemical reaction functions Area, i.e. anoxic/aerobic/aerobic/anoxic/aerobic/aerobic/anoxic/aerobic/aerobic arrangement.Raw sewage is by setting ratio respectively by 3 A anoxic zone enters system, is entered by the returned sludge of secondary settling tank reflux from first section anoxic zone.Mixed liquor in system successively flows It through each reaction zone, is flowed out by latter end aerobic zone and enters secondary settling tank, after mud-water separation, system is discharged in water outlet and excess sludge after processing System, returned sludge are back to first section hypoxia response area.

Embodiment 5:

As shown in fig. 6, Removal of Phosphorus in Wastewater or when using organic pollutant and phosphorus as sewage treatment main target, this is practical new Type device may be configured as aerobic/anaerobic (A/O) dephosphorization process.It is anti-that 18 reaction members in biochemical reaction tank are set as 6 biochemistry Answer functional areas, i.e. anaerobism/aerobic/anaerobic/aerobic/aerobic/aerobic arrangement.Raw sewage and returned sludge are by first section anaerobic reaction area Into mixed liquor is flowed out by latter end aerobic zone followed by each reaction zone and enters secondary settling tank, after mud-water separation, is gone out after processing Water and excess sludge discharge system, returned sludge are back to first section anaerobic reaction area.

Embodiment 6:

As shown in fig. 7, when simultaneously using organic matter, nitrogen and phosphorus as sewage treatment main target when, utility model device can It is set as anaerobic/anoxic/aerobic (A²/ O) synchronous denitrogen dephosphorus technology, 18 reaction members in biochemical reaction tank are set as 9 Biochemical reaction functional areas, i.e. anaerobism/anaerobic/anoxic/anoxic/aerobic/aerobic/aerobic/aerobic/aerobic arrangement.Raw sewage is by head Section anaerobic reaction area enters biochemical reaction tank, by the returned sludge also simultaneous implantation of secondary settling tank reflux；Mixed liquor is followed by 2 Anaerobic zone, 2 anoxic zones and 5 aerobic zones；After flow out biochemical reaction tank, into secondary settling tank；Through secondary settling tank mud-water separation, processing Water outlet and excess sludge discharge system, returned sludge are back to first section anaerobic reaction area afterwards；Mixed liquor in the aerobic zone of end by Bypass inlet and outlet pipes are back to first section anoxic zone, form mixed liquor return-flow system, provide nitrate nitrogen for the anoxic denitrification stage.

Embodiment 7:

As shown in figure 8, leading to A because of the reasons such as sewage quality and operation²When/O technique nitrogen phosphorus ligands efficiency is bad, this reality It may be configured as A with new device²Improvement technique-UCT technique of/O technique, further to promote effects of purification quality.By UCT When process operation.18 reaction members in biochemical reaction tank are set as 9 biochemical reaction functional areas, i.e., anaerobism/anaerobic/anoxic/ Anoxic/aerobic/aerobic/aerobic/aerobic/aerobic arrangement.Raw sewage enters biochemical reaction tank, mixed liquor by first section anaerobic reaction area Behind 2 anaerobic zones, 2 anoxic zones and 5 aerobic zones, biochemical reaction tank is flowed out；Biochemical reaction tank goes out to flow mixed liquor Into secondary settling tank, through secondary settling tank mud-water separation, water outlet and excess sludge discharge system after processing, returned sludge is back to first section and lacks Oxygen reaction zone；Mixed liquor in the aerobic zone of end is partly refluxed to first section anoxic zone by bypass inlet and outlet pipes, forms mixed liquor and returns Stream 1, provides nitrate nitrogen for the anoxic denitrification stage；Mixed liquor in second segment hypoxia response area is by bypass inlet and outlet pipes part It is back to first section anaerobic reaction area, forms mixed liquor reflux 2, flow back dissolved oxygen and the lower mixed liquor of nitrate nitrogen content, is Anaerobic reaction area supplements poly- phosphobacteria.

Claims (8)

1. a kind of reaction tank for Sewage Biological Treatment, it is characterised in that: the reaction tank by two end faces end to end, bottom surface and The length that several medial surfaces being arranged along its length surround upper end opening is prismatic, is respectively set and reacts on two end faces end to end 17 slots, medial surface and bottom are equipped on the inner wall of the water inlet pipe and outlet pipe being connected inside pond, each medial surface and bottom surface The corresponding slot in face surrounds semi-circular, and when plate is arranged in all semi-circular slots, 18 will be divided into inside reaction tank Reaction member；It is equipped with seal cover board at the corresponding reaction tank upper end opening of each reaction member, is equipped with and stirs on each seal cover board Mix device and vent valve；The corresponding reaction tank side of each reaction member is equipped with the bypass inlet and outlet pipes being connected with reaction member, It bypasses and is equipped with valve at inlet and outlet pipes；Each reaction member corresponding reaction tank bottom surface is equipped with aerator and is connected with corresponding Air inlet pipe；The air inlet pipe is equipped with intake valve.

2. reaction tank according to claim 1, it is characterised in that: corresponding at interval of two reaction members in the reaction tank Semi-circular slot in be equipped with plate, or at interval of in the corresponding semi-circular slot of three reaction members be equipped with plate.

3. reaction tank according to claim 2, it is characterised in that: when plate is arranged in semi-circular slot, adjacent insert plates Flowing hole is set according to top and bottom interval respectively.

4. reaction tank according to claim 3, it is characterised in that: the reaction tank is in cuboid, is arranged in reaction tank 17 slots are uniformly distributed along its length, and slot is U-shaped.

5. a kind of biological sewage treatment device comprising any reaction tank of Claims 1-4, it is characterised in that: described more Function biological sewage treatment device further includes secondary settling tank；The secondary settling tank be vertical-flow secondary settling tank, including upper mast cylinder and Lower taper sludge bucket；The cylindrical barrel body center is equipped with central tube；The outlet pipe of the reaction tank is heavy by central tube and two Pond is connected；Effluent weir is equipped with above the cylindrical barrel body.

6. biological sewage treatment device according to claim 5, it is characterised in that: the taper sludge bucket bottom is equipped with row Mud mouth, mud discharging mouth are connected by sludge reflux pump with the water inlet pipe of reaction tank or bypass inlet and outlet pipes.

7. biological sewage treatment device according to claim 5, it is characterised in that: the center bottom of the tube is led equipped with umbrella shape Flowing plate.

8. biological sewage treatment device according to claim 5, it is characterised in that: the multifunctional sewage biological processing dress Setting further includes oxygen charging pump；The oxygen charging pump is connected by corresponding air hose with corresponding aerator.