CN116854250A - Domestic sewage self-defined circulation type circulation emergency treatment method and equipment - Google Patents
Domestic sewage self-defined circulation type circulation emergency treatment method and equipment Download PDFInfo
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to the technical field of sewage treatment, and discloses a domestic sewage self-defined circulating type circulation emergency treatment method and treatment equipment, wherein the method comprises the following steps: s1: setting an emergency concentric circle self-defined circulating reactor; s2: setting a process and working parameters of each local area; s3: water is led into, and the outer ring water bin is treated in a zoning way; s4: and carrying out time-sharing biochemical treatment on the inner ring flowing water bin, and finally enabling the treated water body to flow out of the reactor from the upper part of the inner ring flowing water bin. Aiming at diversified business and emergency requirements of small and medium-sized sewage treatment plants, equipment and processes of the small and medium-sized sewage treatment plants are synchronously upgraded and improved, factory prefabricated standardized and modularized reaction equipment with a base is adopted to carry out custom setting of multistage treatment processes, and aiming at different types and concentrations of pollutants contained in different inflows, equipment and processes are flexibly adjusted to use one set of equipment to match with different multistage treatment processes, so that the treatment requirements on domestic sewage and water pollution emergency incidents are met.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a self-defined circulating type circulating emergency treatment method and equipment for domestic sewage by combining biochemical technology and peacetime.
Background
Domestic sewage is wastewater discharged in daily life of residents, and is mainly divided into urban domestic sewage and rural (including villages and towns) domestic sewage. Urban sewage mainly originates from residential and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprises and toilets, etc. The urban domestic sewage contains pollutants mainly comprising organic matters (such as protein, carbohydrate, fat, urea, ammonia nitrogen and the like) and a large number of pathogenic microorganisms (such as parasitic ova, enterovirus and the like) which can cause great threat to the water environment if improperly treated.
The urban domestic sewage and rural domestic sewage can be discharged after reaching standards, and if the domestic sewage in the urban and rural areas is discharged at will, the ecological environment is threatened greatly due to improper treatment. Meanwhile, along with the occurrence of water pollution emergency caused by various chemical dangerous goods transportation and the like, sewage treatment (station) factories at all levels also need to have certain emergency treatment functions. However, the existing sewage treatment (station) factory equipment and technology cannot support targeted emergency treatment according to different dangerous article pollution.
In the prior art, sewage treatment can be divided into primary treatment, secondary treatment and tertiary treatment. Wherein, 1, the first-stage treatment mainly removes solid pollutants in a suspended state in sewage, and most of physical treatment methods only can meet the requirement of the first-stage treatment. The removal rate of the sewage after the primary treatment reaches more than thirty percent and the sewage can not reach the emission standard; 2. the secondary treatment mainly removes organic pollutants in colloid and dissolved state in the sewage, the removal rate can reach more than fifty percent, and the organic pollutants reach the emission standard; 3. and (3) performing three-stage treatment, and further treating refractory organic matters, nitrogen, phosphorus and other soluble inorganic matters capable of causing water eutrophication and the like. The concentration of organic matters in town wastewater is low, COD is generally about 150mg/L, a small and medium-sized sewage treatment plant can well purify the town wastewater, a stepwise reflux concentric circle internal circulation aerobic reactor can be adopted, the removal of total nitrogen is mainly realized through the ammoniation and nitrification of aerobic microorganisms and the denitrification process of anaerobic microorganisms by adopting a traditional activated sludge method, the biological denitrification is realized by two steps under different conditions by adopting the above process, and nitrified liquid in an aerobic section also flows back to an anaerobic section. Therefore, the existing process technology and processing equipment have complex structure, complex operation, high cost, large debugging operation difficulty and long period.
In the prior art, in the treatment process of urban domestic sewage, rural domestic sewage and sudden water pollution events, sewage treatment equipment generally has two-stage treatment capacity at the same time, and various biochemical treatment processes such as an aerobic biological treatment process, an anaerobic biological treatment process and the like are comprehensively adopted to decompose most of organic matters in sewage into substances such as pollution-free carbon dioxide and water, so that the sewage can be purified and discharged. The biochemical treatment process has various advantages and disadvantages, and the requirements of economy and applicability can be met only by carefully demonstrating and comparing the biochemical treatment process according to actual conditions.
In recent years, a circulating treatment process and equipment for sewage have been developed rapidly. In the circulation treatment technology, the mixed solution of wastewater and activated sludge continuously and circularly flows in a reactor with a circular plane, an elliptical plane or a gallery type, so that pollutants such as organic matters, nitrogen, phosphorus and the like are effectively removed. For example, the document of Chinese patent application No. 202111253203.8 discloses a concentric circle internal circulation aerobic reactor which comprises an outer ring running water bin shell, an inner ring upper layer sedimentation zone, a three-phase separator, an inner ring lower layer mud discharging zone and an outer ring running water bin return flow stripping pipe. The suspended particles with larger particle size are removed by the sewage through the grid, then the suspended particles flow into the water collecting well, the suspended particles enter the concentric circular internal circulation aerobic reactor through the sewage lifting pump, water flows anticlockwise in the outer ring running water bin, water in the outer ring running water bin flows through the two wall penetrating pumps on the inner ring shell and enters the inner ring, and a certain angle is arranged between the outer ring running water bin and the wall penetrating pumps of the inner ring, so that the water flow in the inner ring also flows anticlockwise. The lower layer of the inner ring is subjected to aeration to enable the muddy water and the gas to be completely mixed and then flow out of the upper layer of the outer circulation water bin, then the muddy water and the gas are separated through a three-phase separator, gas stripping is realized after a large amount of gas is collected to form certain pressure, part of mixed liquid of the inner ring is brought back to the outer ring water bin, so that the reflux from the inner ring to the outer ring water bin is realized, meanwhile, the oxygenation is also carried out on the outer circulation water bin, and the reutilization of unused oxygen is realized. The water flow passing through the three-phase separator is further separated from mud and water through an upper layer sedimentation tank, the water discharged from the sedimentation tank is discharged into a river channel after passing through a water outlet weir and checking, the residual sludge is concentrated and dehydrated through the steps of sludge concentration, dehydration and the like, and the residual sludge is transported outwards for disposal after the water content is less than or equal to 80% through plate-frame filter pressing. Therefore, the concentric circle internal circulation aerobic reactor provided by the invention can only adopt a fixed biochemical treatment process, namely: grid filtration, entering a concentric circular internal circulation aerobic reactor, flowing anticlockwise in an outer ring running water bin, performing aerobic reaction, entering an inner ring through a wall penetrating pump, performing aerobic reaction again, enabling mud water and gas to be mixed completely by aeration at the lower layer of the inner ring, flowing into the upper layer of the outer circulation running water bin, flowing into a sedimentation tank outside the reactor, further separating mud water, and discharging the mud water into a river channel after reaching standards. The sewage can only carry out aerobic reaction in the inner ring and the outer ring of the running water bin, but can not carry out anaerobic, anoxic and aerobic biochemical process combination, so that the sewage treatment device is only suitable for treating sewage with low concentration of organic matters and about 150mg/L COD, cannot comprehensively use various biochemical treatment processes, takes advantage of the shortages, and can treat sewage with high concentration of other organic matters and over 160mg/L COD, and the application range of the sewage treatment device is greatly limited.
In addition, because the sources of urban domestic sewage and rural domestic sewage, the pollutant components and concentrations in sudden water pollution events and the like are greatly different, the types and the concentrations of pollutants in sewage in north-south areas and different seasons are different and even greatly different, in the prior art, sewage treatment plants (stations) with different scales and treatment processes are often required to be constructed for treatment, the treatment processes, procedures and flow rates adopted by the sewage treatment plants (stations) are fixed, the equipment and facilities can be customized, designed, built and operated according to project requirements, a set of standardized production equipment cannot be adopted, flexible adjustment of the process, procedure and flow rate is carried out according to the quality, flow rate and other parameters of incoming water, and the process and procedure with stronger pertinence is adopted in the elastification, so that the number of the sewage treatment plants (stations), the cost of customized design and construction are reduced, and the occupation space, the treatment time and the treatment cost of the sewage treatment plants (stations) are reduced.
The domestic sewage treatment equipment and the treatment method in the prior art have the following defects: most of equipment and facilities cannot be prefabricated in a modularized manner in a factory and installed on site, so that the construction period is long, the cost investment is large, and the equipment and the facilities cannot be moved once being built; a small amount of wastewater can be prefabricated in a factory, such as patent application number 202111253203.8, on one hand, the wastewater cannot be moved after being installed and built by a large amount of site foundation construction, on the other hand, the wastewater can be treated only through aerobic reaction, the wastewater cannot be changed according to the types and the concentrations of pollutants in different inflows, and under the condition that the overall layout and the structure of the wastewater are unchanged, various treatment processes and flows are adopted to meet the wastewater treatment requirements of high concentration of the pollutants and difficult degradation, so that the treated wastewater with different water qualities can be discharged stably and up to standard.
To sum up, the prior art has the disadvantages of: the existing sewage treatment (station) factory equipment and technology cannot support targeted emergency treatment according to different dangerous article pollution; because the types and the concentrations of pollutants (or dangerous goods in emergency events) in the sewage are more, the corresponding treatment processes and equipment are often required to be designed according to the types and the concentrations of the pollutants in the sewage, and the pertinence of equipment facilities is stronger, so that the treatment processes and the equipment are customized design and manufacture, are special, have no universality and cannot be manufactured, installed, operated and maintained in batches, and the sewage treatment equipment and process are complex and high in cost; after the equipment of the existing medium-sized and small sewage treatment plant is manufactured, installed and operated, the equipment can be treated according to one treatment process generally, but the treatment process can not be flexibly adjusted according to the variety and concentration of pollutants in the incoming water, so that the balance between the treatment cost and the treatment effect is realized, and the problems that the water quality can reach the standard but the treatment cost is high or the water quality after treatment does not reach the standard easily occur; because the types and the concentrations of pollutants in seasonal running water are different (the types and the concentrations of pollutants in sewage of different sources are also different, and the types and the concentrations of pollutants of the same source are also greatly changed according to the discharge activity difference of upstream production and life), the equipment and the treatment process cannot be adjusted in time in a targeted manner so as to reduce the operation cost of equipment sewage treatment; once the facility is built, it is no longer possible to move the location and to make secondary use of the assembly.
Disclosure of Invention
Aiming at the defects of the method, the invention aims to provide a circulating self-defined intensive treatment method and reaction equipment for biochemical sewage, upgrade and reform equipment and process of a small and medium-sized sewage treatment plant on the basis of less equipment and small occupied area, adopt factory-prefabricated standardized, modularized and assembled reaction equipment with a base, combine the device to carry out self-defined setting of a multistage treatment process, and flexibly adjust the equipment and the process according to different types and concentrations of pollutants contained in different inflows by dividing areas, so that the small and medium-sized sewage treatment plant uses a set of equipment to match with different multistage treatment processes, can support targeted emergency treatment according to different dangerous article pollution, meet the treatment requirements of domestic sewage and emergency sewage, realize stable water quality discharge of the treated reclaimed water and overcome the defects of the prior art.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the domestic sewage self-defined circulating type circulation emergency treatment method is characterized by comprising the following steps of:
s1: setting domestic sewage self-defined circulating emergency treatment equipment: the device comprises a concentric circular circulating reactor, a plurality of aeration modules, an aeration pipe and other matched equipment, devices and pipelines; the concentric circle circulation type reactor comprises: the device comprises a base, a concentric inner ring guide wall and an outer ring guide wall which are arranged above the base, wherein an outer circulation water sump is formed in the area between the inner ring guide wall and the outer ring guide wall, and an inner circulation water sump is formed in the area inside the inner ring guide wall; the external circulation water bin is internally provided with a plurality of flow-limiting baffles with different height flow-guiding openings, and each flow-limiting baffle singly or jointly divides the external circulation water bin into at least four mutually connected local areas to form a plurality of local treatment pools which enable water flow to flow in and out in a single direction and bend up and down; the plurality of independently working aeration modules and the aeration pipes are arranged in the lower area of the base, and each aeration module and each aeration pipe pass through the thickness of the base through the aeration pipe to reach the local treatment pool separated by each flow limiting baffle plate in the outer circulation water bin and each local area in the inner circulation water bin;
S2: setting the working parameters of the process and each local area: according to the types and the concentrations of pollutants in the sewage treated by the grids, the grit chambers and the regulating tanks arranged outside the concentric circle circulating reactor, one of A/O, A/O+A/O or A/O+precipitation reaction treatment processes is selected, or A/A/O, A/O and precipitation processes are subjected to custom sequencing and combination, and then according to the selected or custom reaction process, the arc-shaped lengths of a plurality of local treatment tanks and the opening heights of each current-limiting baffle plate which are sequentially connected with an external circulation water tank (67) are correspondingly adjusted, and the working parameters of an aeration module below each local treatment tank are respectively corresponding to A, O or one of the precipitation treatment processes; setting working parameters of aeration pipes corresponding to the aeration pipe distribution areas below all local areas in the inner circulation water bin, so that all local areas in the inner circulation water bin also correspond to A, O or one of the sedimentation treatment processes respectively;
s3: water-through and outer ring running water bin regional biochemical treatment: after primary treatment of domestic sewage to be treated through a grid, a grit chamber and an adjusting tank outside the concentric circle circulating reactor, the domestic sewage enters the concentric circle circulating reactor for treatment through the top of a first anaerobic local treatment tank area of an outer circulation water sump: enabling the water flow of sewage to enter and exit each local treatment tank along a single direction, enabling the water flow to bend up and down in each local treatment tank, controlling the opening or closing of an aeration module below each local treatment tank at the moment, implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank, enabling the water body to bend again, flow to enter the next local treatment tank to perform next biochemical process treatment, and implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank by controlling the opening or closing state of an aeration module below the current local treatment tank; after the sewage sequentially passes through all the local treatment pools of the outer ring running water bin and is treated, finishing the treatment cycle of the outer ring running water bin; after finishing the treatment cycle of a plurality of outer circulation water bins, sewage flows into the inner ring circulation water bins for continuous treatment;
S4: time-sharing biochemical treatment of the inner ring flowing water bin: after the sewage flows into the inner ring running water bin, the biochemical and sedimentation treatment steps are continued; respectively controlling the opening or closing of a plurality of mutually independent aeration pipes arranged right below the inner circulation water bin, correspondingly carrying out A, O of a local area or a sedimentation treatment process, introducing oxygen into a water body right above each independent aeration module or each aeration pipe to carry out an O treatment process when each independent aeration module or each independent aeration pipe is opened, carrying out an A process when each independent aeration module or each independent aeration pipe is closed, and continuously closing for an interval time required by sedimentation, and carrying out a sedimentation process; after each local area is treated once, one inner ring running water bin treatment cycle is completed; after the treatment circulation of a plurality of internal circulation water bins is completed, the regenerated water quality reaches the standard and finally flows out of the concentric circle circulation reactor from the upper part of the internal circulation water bins.
The domestic sewage self-defined circulation type circulation emergency treatment equipment is characterized by being used for implementing the domestic sewage self-defined circulation type circulation emergency treatment method and comprising a concentric circular circulation type reactor, a plurality of aeration modules, aeration pipes and other matched equipment and devices; the concentric circle circulation type reactor comprises: the device comprises a base, a concentric inner ring guide wall and an outer ring guide wall which are arranged above the base, wherein an outer circulation water sump is formed in the area between the inner ring guide wall and the outer ring guide wall, and an inner circulation water sump is formed in the inner area of the inner ring guide wall; an outer circulation water bin) is internally provided with a plurality of flow limiting baffle plates, and flow limiting openings with different heights are formed among each flow limiting baffle plate, the base, the inner ring flow guiding wall and the outer ring flow guiding wall; each flow limiting baffle plate is used for independently or jointly dividing the outer ring running water bin into at least four mutually connected local areas to form a plurality of local treatment pools for enabling water flow to flow in and out in a single direction and to bend up and down; the plurality of independently working aeration modules and the aeration pipes are arranged in the lower area of the base, and each aeration module and each aeration pipe pass through the thickness of the base through the aeration pipe to reach the local treatment pool separated by each flow limiting baffle plate in the outer circulation water bin and each local area in the inner circulation water bin; the plurality of independently working aeration modules and aeration pipes change the water treatment process of the corresponding area above the aeration modules and the aeration pipes through the working states of opening and closing; all the components are in modularized, standardized and assembled design, and are prefabricated by a factory and directly installed on site.
Compared with the prior art, the invention has the advantages that:
1. the domestic sewage self-defined circulating type circulation emergency treatment method and treatment equipment provided by the invention aim at the diversified business requirements of small and medium-sized sewage treatment plants, upgrade and reform the equipment and process of the small and medium-sized sewage treatment plants on the basis of less equipment and small occupied area, adopt factory-prefabricated standardized, modularized and assembled reaction equipment with a base, combine the device to carry out the self-defined setting of the multistage treatment process, flexibly adjust the equipment and process according to different types and concentrations of pollutants contained in different influent water, enable the small and medium-sized sewage treatment plants to use a set of equipment to match with different multistage treatment processes, meet the treatment requirements of domestic sewage and industrial sewage, and support the targeted emergency treatment according to different dangerous article pollution, thereby realizing the stable standard discharge of the treated sewage.
2. The invention designs the structure of the concentric circular flow reactor through the flexible optimization and combination of the biochemical reaction treatment process method and the treatment equipment, and can well coordinate contradiction and competition existing in the sewage biological simultaneous dephosphorization and denitrification process by matching with the control step capable of being flexibly regulated, thereby realizing better pollutant removal efficiency. Therefore, the circulation process provided by the invention has the advantages of simple flow, small occupied area, low manufacturing cost, strong technical advantages in the aspects of operation management and the like, accords with the general trend of the current sewage biological treatment process technology development, and is an important direction of the development of the domestic sewage treatment technology field and urban and rural domestic sewage denitrification and dephosphorization technology.
3. The invention can realize the free combined circulation sewage treatment process (reactor) for anaerobic, anoxic and aerobic processes by improving the operation control and process of the treatment equipment and the treatment method, and can improve the competitive advantage of some special functional microorganism flora to a certain extent and induce biological denitrification and dephosphorization mechanisms and action ways of non-traditional ways and improve the reaction efficiency because the process can create the alternation of anaerobic, anoxic and aerobic environments in a single reactor. Therefore, the reaction technology and the equipment which can be flexibly combined are creative breakthroughs of sustainable biological denitrification and dephosphorization processes.
4. The domestic sewage self-defined circulating type circulation emergency treatment method and the treatment equipment provided by the invention can adopt a newly designed reaction process and reaction equipment aiming at urban domestic sewage and rural domestic sewage with different concentrations and components, so that the domestic sewage can be subjected to composite purification treatment according to the self-defined treatment process and meets the discharge requirements; the sewage treatment process and the reaction equipment which can be mutually adapted under various working modes are cooperatively designed, and the equipment can support most of domestic sewage and industrial sewage treatment processes through synchronous innovation combination of process improvement and tank body structure, so that the universality of the equipment is realized, the treatment capacity and the treatment effect of a small and medium-sized sewage treatment plant are greatly expanded, and the construction and operation cost is reduced.
5. The treatment method and the treatment equipment provided by the invention adopt standardized, modularized and assembled designs, are prefabricated in factories and are installed on site, so that the construction mode of the existing sewage plant is changed; after the construction, the treatment process which is most matched with the sewage can be selected according to different sewage types and concentrations under the condition of not changing the whole structure and the layout of the reaction equipment, so that the treatment capacity is improved, the treatment cost is reduced and the treatment object range is expanded.
6. The treatment method and the treatment equipment provided by the invention combine 5 tanks arranged on the plane in the prior art into a whole, and the integrated combined reactor is integrally adopted, so that two stages of AO and precipitation separation systems can be supported, wherein slag-water separation and chemical oxidation links can be adapted to different water inlet concentrations, the phenomenon that a plurality of tanks are complicated to manage is avoided, the occupied area is reduced, the investment cost is reduced, the construction period is shortened, the intensive type of the system is improved, the automation degree is higher, and the management is more convenient.
7. The treatment method and the treatment equipment provided by the invention adopt standardized, modularized and assembled designs, the defect that the sewage treatment process cannot be converted after the equipment is built is overcome by innovative combination of process improvement and a tank body structure, each component can flexibly adjust the working state and the operation parameters, the large data and intelligent operation technology can be further supported, the intellectualization of operation and maintenance is realized, and the operation cost is reduced; the method provides technical support for truly building a modularized, assembled, multipurpose and low-energy-consumption low-carbon sewage treatment plant.
Drawings
FIG. 1 is a schematic view of a three-dimensional outline structure of an emergency treatment device according to an embodiment of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic view of the whole cross-sectional structure of FIG. 1;
FIG. 4 is a schematic view of the cross-sectional structure of FIG. 1;
fig. 5 is a partial perspective view of the concentric circular loop reactor of fig. 1.
FIG. 6 is a schematic top view of the zone distribution of a concentric circular loop reactor according to an embodiment of the invention.
FIG. 7 is a schematic view of the structure of an aeration pipe at the bottom of a treatment apparatus base according to an embodiment of the present invention;
fig. 8 is a schematic top view of the aeration module of fig. 7;
FIG. 9 is a schematic plan view of the distribution of the flow restricting baffles in the outer circulation sump of FIG. 1;
FIG. 10 is a schematic view showing a partial cross-sectional structure of a concentric circular circulation reactor according to an embodiment of the present invention.
FIG. 11 is a schematic diagram of an overall process flow according to an embodiment of the invention.
In the figure:
60. a reactor; 61. a base; 62. an outer ring guide wall; 63. an outer ring guide wall clamping plate; 64. an inner ring guide wall; 65. an inner ring guide wall clamping plate; 66. a central partition; 67. an outer circulation sump; 68. an internal circulation water bin; 69. a groove; 70. a horizontal bracket; 71. a vertical support; 72. a horizontal bracket; 4. no. 1 current limiting baffle; 5. no. 2 current limiting baffle; 6. no. 3 flow-limiting separator; 7. no. 4 flow-limiting baffle; 8. no. 5 flow-limiting baffle; 9. no. 6 flow-limiting baffle; 10. no. 7 flow-limiting separator; 11. no. 8 flow-limiting baffle; 12. no. 9 flow-limiting separator; 13. no. 10 current limiting baffle; 16. a mud-water separator; 17. a precipitation zone; 18. a water outlet collector; 19. blow-down pipe; 20. an aeration module; 21. an aeration pipe distribution area; 23. and (5) aerating the pipe.
The specific embodiment is as follows:
the technical scheme of the invention is described in detail below with reference to the attached drawings and a plurality of embodiments.
Example 1
The domestic sewage self-defined circulating type circulation emergency treatment method and the treatment equipment provided by the invention are used for meeting the diversified business requirements of newly-built small and medium-sized sewage treatment plants, adopting factory-prefabricated standardized, modularized and assembled reaction equipment provided with a base, combining the device to perform self-defined setting of a multi-stage treatment process, flexibly adjusting the equipment and the process according to different types and concentrations of pollutants contained in different inflow water, enabling the small and medium-sized sewage treatment plants to use a set of equipment to match with different multi-stage treatment processes, meeting the requirements of emergency treatment on domestic sewage treatment and emergency water pollution events and the like, and realizing stable standard discharge of the treated reclaimed water.
Referring to fig. 1-11, the present embodiment provides a domestic sewage self-defined circulation type circulation emergency treatment method capable of implementing flexible combination of different biochemical processes, which is mainly applied to treating various domestic sewage in a small and medium sewage treatment plant, and includes the following steps:
s1: setting domestic sewage self-defined circulating emergency treatment equipment: it comprises a concentric circular circulation reactor 60, a plurality of aeration modules 20 and aeration pipes 23; the concentric circle circulation reactor 60 includes: the device comprises a base 61, a concentric inner ring guide wall 64 and an outer ring guide wall 62, wherein the base 61 is prefabricated by a planar steel plate, the concentric inner ring guide wall 64 and the outer ring guide wall 62 are arranged above the base 61, an outer circulation water sump 67 is formed in the area between the inner ring guide wall 64 and the outer ring guide wall 62, and an inner circulation water sump 68 is formed in the inner area of the inner ring guide wall 64; the outer circulation water bin 67 is internally provided with a plurality of flow-limiting baffles with flow-guiding openings at different heights (absolute heights or relative heights), no. 1-10 (corresponding to reference numerals 4-13 respectively), each flow-limiting baffle singly or jointly divides the outer circulation water bin 67 into at least four mutually connected local areas, a plurality of local treatment pools for enabling water flow to flow in and out in a single direction and to bend up and down are formed, and the serial numbers of the local treatment pools are A-J (corresponding reference numerals are A-J in turn); the plurality of independently working aeration modules 20 and aeration pipes 23 are arranged in the lower area of the base 61, the aeration modules 20 and the aeration pipes 23 which are respectively and independently opened and closed by the electric control valves pass through the thickness of the base 61 through the aeration pipeline, and reach the local treatment pool (corresponding reference numerals are A to J in sequence) areas separated by the flow limiting baffles of the outer circulation water bin 67 and the local areas of the inner circulation water bin 68;
Further, on the side walls of the outer ring guide wall 62 and the inner ring guide wall 64, a plurality of vertical grooves 69 are respectively arranged in a central radiation mode, at intervals and correspondingly, and when the flow limiting partition plate is inserted into the inside of each groove 69, the height of the positioned flow limiting partition plate can be adjusted by the grooves; the grooves can be obtained by additionally arranging a layer of arc-shaped steel plates on the side walls of the outer ring guide wall 62 and the inner ring guide wall 64 and reserving proper gaps between the arc-shaped steel plates; the flow limiting baffle is moved and inserted into the grooves at different positions, so that the local treatment pool with different arc lengths and relative height openings can be obtained, and the flow speed and flow of water flow in the local treatment pool are regulated to meet the treatment requirements of different biochemical processes;
s2: setting the working parameters of the process and each local area: according to the type and concentration of pollutants in the sewage after primary treatment of the domestic sewage by a grid, a grit chamber, an adjusting tank and the like arranged outside the concentric circle circulation reactor 60, one of A/O, A/O+A/O or A/O+precipitation reaction treatment processes is selected, or A/A/O, A/O and precipitation processes are subjected to custom sequencing and combination, and then the arc-shaped lengths (the arc-shaped lengths occupying the outer circulation water chambers) of a plurality of local treatment tanks connected in sequence by the outer circulation water chambers 67 and the opening heights (H) of the current limiting baffle plates are correspondingly adjusted according to the selected or custom reaction process 1 Or H 3 ) The working parameters of the Fang Baoqi module 20 under each local treatment pool are matched with each local treatment pool of the external circulation sump 67 to be A, O or one of the sedimentation treatment processes respectively; setting working parameters (aeration open-close state, aeration speed, duration or interval duration and the like) of a plurality of aeration pipes 23 which are independently opened and closed and work and correspond to the aeration pipe distribution areas 21 below each local area in the inner circulation water sump 68, so that each local area in the inner circulation water sump 68 also corresponds to one of A, O or sedimentation treatment process respectively;
advancing oneStep, the worker can combine and refine the process to the corresponding process of each local treatment pool according to the selected process, then vertically insert the flow-limiting baffle plates into the grooves 69 at the corresponding positions (arc length and relative height), and synchronously and correspondingly adjust the arc length of the outer circulation water bin 67 occupied by each local treatment pool, the flow-guiding opening direction and opening height (H 1 Or H 3 ) Combining the working parameters of the independent aeration modules 20 under the external circulation water bin 67 to enable each local treatment pool of the external circulation water bin 67 to correspond to one section of A, O, anoxic or sedimentation treatment process respectively; after the partial treatment tanks of each section are connected in sequence, the biochemical treatment process of sewage can be implemented by combining the working parameters of each independent aeration module 20 and arranging the specific combinations in sequence; the local areas formed between the single or a plurality of adjacent flow-limiting baffles are sequentially communicated to form a local treatment pool (each local treatment pool can be formed by the local areas formed between the single or a plurality of adjacent flow-limiting baffles according to actual process requirements);
S3: water is led into, and the external circulation water bin 67 is subjected to regional biochemical treatment: after the domestic sewage to be treated is subjected to primary treatment by the grid, the grit chamber and the regulating tank outside the concentric circle circulation reactor 60, the domestic sewage enters the concentric circle circulation reactor 60 through the top of the first anaerobic local treatment tank area (the area A right in front of the flow limiting baffle with the reference number of No. 1 and the reference number of 4 in the embodiment) of the outer circulation water sump 67 for circulation treatment: enabling the water flow of sewage to enter and exit each local treatment tank along a single direction, enabling the water flow to bend up and down in each local treatment tank, controlling the opening or closing of a Fang Baoqi module 20 under each local treatment tank respectively at the moment, implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank, then bending the water again, enabling the water flow to enter the next local treatment tank to perform the next biochemical process treatment, and implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank by controlling the opening or closing state of a Fang Baoqi module 20 under the current local treatment tank; after the sewage sequentially passes through all the local treatment pools of the outer circulation water bin 67 and is treated, the treatment cycle of the outer circulation water bin 67 is completed; after the treatment cycle of the plurality of outer circulating water bins 67 is completed, sewage flows into the inner circulating water bins 68 for continuous treatment;
S4: and (3) time-sharing biochemical treatment of the inner circulation sump 68: after the sewage flows into the inner annular running water bin 68 from the last anaerobic local treatment pool area (such as the area right in front of the last flow limiting baffle) of the outer annular running water bin 67, the biochemical and sedimentation treatment steps are continued; the opening or closing of a plurality of mutually independent aeration pipes 23 arranged right below the inner circulation water bin 68 is respectively controlled, A, O or sedimentation treatment process of a local area is correspondingly carried out, when each independent aeration module or aeration pipe 23 is opened, oxygen is introduced into the water body right above the independent aeration module or aeration pipe to carry out O treatment process, when each independent aeration module 20 or aeration pipe 23 is closed, A process is carried out, and when the independent aeration module 20 or aeration pipe 23 is continuously closed, sedimentation process is carried out for the interval time required by sedimentation; after each local area is treated once, one treatment cycle of the inner ring running water bin 68 is completed; after the treatment cycle of the plurality of inner circulation water bins 68 is completed, the reclaimed water reaches the standard and finally flows out of the concentric circle circulation reactor 60 from the upper part of the inner circulation water bins 68.
The outer circle diameter D of the outer circle guide wall 62 1 Diameter D of the inner circle where the inner circle guide wall 64 is located 2 And the height H of the outer ring guide wall 62 and the inner ring guide wall 64 satisfy the following relationship:
Diameter of outer circle D 1 The method meets the following conditions: pi D 1 2 4*K =t×q formula 1
Diameter of inner circle D 2 The method meets the following conditions: pi D 2 2 4*K = (0.5-2) Q formula 2
At the same time: d (D) 1 /D 2 ＝1.1～2，H≥1/3*D 2 Equation 3
H＝ H 1 + H 2 + H 3 Equation 4
Wherein:
pi: circumference ratio
D 1 : diameter of outer circle, unit m
D 2 : inner diameter, unit m
T: the total residence time of sewage treatment is calculated according to the specification, and the unit is h
Q: water treatment per hour, unit m 3 /h
K: height adjustment coefficient, the value is 1-2, unit m
H: the height of the outer circulation sump guide wall and the inner ring guide wall is in unit of m;
H 1 : the height of the upper section flow guiding opening of the flow limiting baffle plate is in unit m
H 2 : middle section height of flow-limiting partition board, unit m
H 3 : the height of the diversion opening at the lower section of the flow-limiting baffle plate is in m.
The height H of the outer ring guide wall 62 and the inner ring guide wall 64=the upper section H 1 +middle H 2 +lower section H 3 。
In the embodiment, 9 flow-limiting baffles are sequentially arranged in the outer ring running water bin 67, and the number of the flow-limiting baffles is from No. 4 to No. 13; the No. 4 flow limiting baffle is an initial flow limiting baffle, and an area formed at the front part of the flow limiting baffle is an external sewage inflow area; the height of each flow-limiting baffle plate and the inner ring guide wall, the outer ring guide wall and the base 61 in the outer ring running water bin 67 are respectively H in section 1 Or H 3 Wherein the cross-section height is H 1 The flow guiding opening of (2) is an upper water trough with a section height H 3 The diversion openings of the sewage treatment device are lower water passing grooves, the upper water passing grooves and the lower water passing grooves are alternately arranged in sequence, sewage is guided to flow up and down when passing through each local treatment pool, and corresponding biochemical treatment process is implemented; wherein, the flow-limiting partition boards with the numbers 1, 3, 5, 7 and 9 (corresponding to the reference numbers 4, 6, 8, 10 and 12) are provided with flow-guiding openings at the upper part to form an upper water passing tank, and the flow-limiting partition boards with the numbers 2, 4, 6, 8 and 10 (corresponding to the reference numbers 5, 7, 9, 11 and 13 respectively) are provided with flow-guiding openings at the lower part to form a lower water passing tank.
In this embodiment, the 9 flow-limiting baffles in the outer ring running water bin 67 are all arranged in a central radiation manner by taking the center of the outer ring flow-guiding wall 62 as the center, wherein the flow-limiting baffles with numbers 1, 2, 3, 4 and 5 (corresponding to the reference numbers 4, 5, 6, 7 and 8) have the deflection included angles formed by the cross section axes extending to the center of the circle respectively of 22.5 degrees; the deflection included angles formed by the extension of the cross section axes of the flow-limiting baffles numbered 6, 7, 8, 9 and 10 (corresponding to the reference numerals 9, 10, 11, 12 and 13) to the circle center are all 45 degrees;
the deflection included angle of each flow-limiting baffle is matched with the direction and the sectional area of the flow-guiding opening to guide the flow, so that the flow speed passing through each water-passing groove is kept at 0.02-0.2 m/s.
In this embodiment, each flow-limiting partition plate is detachably (vertically inserted or hinged on one side) arranged between the outer ring guide wall 62 and the inner ring guide wall 64; each vertical groove 69 arranged on the corresponding side wall of the outer ring guide wall 62 and the inner ring guide wall 64 respectively has a corresponding deflection included angle of 22.5 degrees or 45 degrees, and when each flow limiting baffle plate is arranged in the groove, the corresponding deflection included angle of 22.5 degrees or 45 degrees is obtained for guiding;
the flow-limiting baffles are inserted and pulled in the vertical direction and installed in the corresponding grooves 69 according to the process and the working parameters of the local areas set in the step S2, and the direction and the relative height of the opening of the water passing groove of each flow-limiting baffle are adjusted in the installation process, so as to adjust the speed and the depth of each section of water flow and the biochemical treatment time when the water flows through, and the flow speed, the flow quantity and the treatment process of the sewage in each local treatment pool are kept matched with each other.
In the present embodiment, the flow-limiting baffles form the relative height (opening cross-sectional height) H of the water passing trough 1 Or H 3 The following relationship is satisfied:
H 1 *(D 1 -D 2 )/2*P＝ Q S (equation 5)
H 3 *(D 1 -D 2 )/2*P＝Q S (equation 6)
Wherein:
D 1 : diameter of outer circle, unit m
D 2 : inner diameter, unit m
P: the flow velocity adjustment coefficient takes a value of 0.1 to 1, the unit m/s,
Q S : treated water amount per second, unit m 3 /s。
Examples according to practical need, H 1 Or H 3 The thickness of the material may be selected to be 0.3 to 2.5m.
Furthermore, in order to enhance the fastening and supporting strength, on the upper surface of the base 61, two side walls surrounding the outer ring guide wall 62 are respectively provided with annular outer ring guide wall clamping plates 63 made of metal which are parallel to each other, a gap between the two plates forms a positioning groove, the outer ring guide wall 62 is embedded in the positioning groove, the fastening strength of the bottom of the outer ring guide wall 62 is enhanced, and water leakage under strong water pressure is avoided;
similarly, in this embodiment, on the upper surface of the base 61, two side walls surrounding the inner ring guide wall 64 are respectively provided with annular inner ring guide wall clamping plates 65 parallel to each other, and a positioning groove is formed in a gap between the two annular inner ring guide wall clamping plates, and the inner ring guide wall 64 is embedded in the positioning groove to enhance the connection strength thereof.
In order to support more biochemical treatment processes, in this embodiment, a central partition plate 66 is disposed on the inner circle center line of the inner circulation sump 68, the inner space of the inner circulation sump 68 is divided into partial areas, and then the opening and closing states of the aeration module 20 and the aeration pipe 23, which are provided with independent switches and correspond to the lower parts of the partial areas, are combined, so that a plurality of inner circle partial areas after dynamic division form biochemical treatment areas or sedimentation areas which can be alternately converted into one of sedimentation tanks, sludge tanks, clean water tanks or deep treatment tanks which are alternately converted in a time-sharing manner, and the flow speed is controlled, so that the sewage stays in the sedimentation tanks for alternately treatment for 0.5-3 h;
In this embodiment, the partial areas inside the inner ring running water bins 68 may be treated with secondary treatment or tertiary treatment (chlorine, ultraviolet radiation or ozone) for the sewage again, alone or in combination with the partial treatment tanks of the outer ring running water bins 68, so that the treated reclaimed water can stably reach the standard from the inner ring treatment tanks and then flow out of the concentric circular circulation reactor 60 from the upper part of the inner ring running water bins 68.
The domestic sewage self-defined circulation type circulation emergency treatment equipment is used for implementing the domestic sewage self-defined circulation type circulation emergency treatment method and comprises a concentric circular circulation type reactor 60, a plurality of aeration modules 20, an aeration pipe 23, and other matched water and gas transmission pipelines, fans, a plug flow pump and the like; the concentric circle circulation reactor 60 includes: the base 61, the concentric circle inner ring guide wall 64 and the outer ring guide wall 62 which are arranged above the base 61, an outer circulation water sump 67 is formed in the area between the inner ring guide wall 64 and the outer ring guide wall 62, and an inner circulation water sump 68 is formed in the inner area of the inner ring guide wall; a plurality of flow-limiting baffles are arranged in the outer circulation water bin 67 and are respectively numbered 1-10 (corresponding to reference numerals 4-13), and flow-guiding openings with different relative heights (the sectional heights of the openings) are formed among the flow-limiting baffles, the base 61, the inner ring flow-guiding wall 64 and the outer ring flow-guiding wall 62; each flow limiting baffle plate singly or jointly divides the outer ring running water bin 67 into at least four mutually connected local areas to form a plurality of local treatment pools which enable water flow to flow in and out in one direction and bend up and down, and the serial numbers are A to J respectively; the plurality of independently working aeration modules 20 and aeration pipes 23 are arranged in the lower area of the base 61, and each aeration module 20 and aeration pipe 23 passes through the thickness of the base 61 through an aeration pipeline to reach the local treatment tanks separated by each flow limiting baffle plate of the outer circulation water bin 67, the numbers A-J (in other embodiments, four local treatment tanks A-D or more than ten local treatment tanks can be arranged according to actual needs) and each local area of the inner circulation water bin 68; the plurality of independently working aeration modules 20 and aeration pipes 23 change the treatment process of the water body in the corresponding area above the aeration modules by the working state of opening and closing; all the components are modularized, standardized and assembled, and are prefabricated by a factory and directly installed on site, so that the site construction speed is increased, and the construction cost is reduced; but also can be disassembled and reassembled again.
In order to enhance the circumferential and vertical strength of the concentric inner ring guide wall 64 and the outer ring guide wall 62, a plurality of mutually parallel annular horizontal brackets (70) and a plurality of vertically arranged mutually parallel vertical brackets 71 are respectively arranged on the inner side surface of the concentric inner ring guide wall 64 and the outer side surface of the outer ring guide wall 62, are prefabricated members made of steel plates and are mutually connected through fasteners at a construction site, and are arranged on the concentric inner ring guide wall 64 and the outer ring guide wall 62 for enhancing the mechanical strength of each guide wall for each part of the reactor 60.
The domestic sewage self-defined circulating type circulation emergency treatment equipment also comprises a mud-water separator 16, wherein the mud-water separator 16 is a three-phase separator and deformation thereof or is in a form of combining diversion and inclined tube precipitation, the height of the mud-water separator 16 is 0.5-2 m, and the mud-water separator is a region which is partially or completely distributed with an inner circulation water sump 68, and the distance between the top of the mud-water separator and the water surface is more than or equal to 0.5m.
The domestic sewage self-defined circulating type circulation emergency treatment equipment further comprises a water outlet collector 18, wherein the water outlet collector 18 is one of a triangular weir water collecting tank, a rectangular weir water collecting tank and a submerged water collecting structure.
Other structures or specific operation manners of the embodiment may also refer to the prior art (such as CN 202111253203.8) or the conventional technology.
According to the embodiment of the invention, the multiple flow-limiting baffles are used for dividing the external circulation water sump into areas and dividing the areas into mutually separated treatments, and the process sections A and O which correspond to the reaction volume and the length can be freely combined among the local treatment tanks, so that the flowing length of sewage in the external circulation water sump can be greatly prolonged (about H times improvement), the circulation treatment process, the sewage flow rate and the treatment time of each section can be flexibly regulated and controlled, and through the addition of the aeration modules in each area, one of the corresponding A, O treatment process and the sedimentation treatment process can be realized, the environmental conditions of biochemical reactions (three different biochemical environments of aerobic, anoxic and anaerobic are created in a segmented manner) can be freely changed, and A, O or random selection and arrangement combination of the sedimentation treatment processes can be realized, so that the treatment requirements of different sewage can be met.
In the embodiment of the invention, sewage sequentially flows through at least four mutually connected local areas separated by each flow-limiting baffle plate, biochemical circulation treatment is carried out by the reaction equipment according to the treatment process set in the step S2, the treated reclaimed water is discharged from a water outlet collector at the upper part of the reaction equipment and is discharged after reaching standards through a filter cloth filter and ultraviolet disinfection, the circulating intensive biochemical sewage treatment reaction equipment with a standardized production structure and layout is realized, and various self-defined treatment processes are adopted to carry out circulating intensive treatment on various types of wastewater with different concentrations. The emergency treatment of water pollution events by the targeted process according to different dangerous article pollution can be well supported.
The treatment equipment (comprising the reactor 60) adopts the overground steel structure tank body, so that the problems of difficult civil construction and high cost are solved. The treatment equipment disclosed by the invention has small occupied area, and can be suitable for constructing a small sewage treatment plant (treatment station) in an area with small available space and no construction condition in civil engineering excavation; the main equipment concentric circle circulation type reactor 60 adopts a ground type steel structure tank body, so that the investment cost can be reduced, and the construction period can be shortened.
The AO process adopted in the embodiment of the invention is also called an Anaerobic-aerobic process, A (Anaerobic) is an Anaerobic section and is used for denitrification and dephosphorization; o (Oxic) is an aerobic section for removing organic matter in water. The advantage of the method is that besides degrading organic pollutants, the method has certain denitrification and dephosphorization functions, and the anaerobic hydrolysis technology is used as the pretreatment of the activated sludge, so that the AO method is a high-efficiency activated sludge method.
Example 2
This example is a specific application case based on example 1. In this embodiment, a middle-small domestic sewage treatment plant in the north is taken as an example, and the technical scheme of the invention is described in detail. The wastewater treated in this example is mainly domestic sewage of villages and towns, and the sewage treatment capacity is 3000m 3 And/d, the incoming water concentration and the regenerated water discharge index of the domestic sewage are shown in the following tables 1 and 2.
Table 1: design the quality of the water
| Index of water quality | Numerical value | Index of water quality | Numerical value |
| COD | ≤350mg/L | BOD | ≤180mg/L |
| NH 3 -N | ≤45mg/L | TN | ≤80mg/L |
| TP | ≤4mg/L | SS | ≤150mg/L |
| pH | 6～9 |
Table 2: regenerated water discharge index
| Index of water quality | Numerical value | Index of water quality | Numerical value |
| COD | ≤50mg/L | BOD | ≤10mg/L |
| NH 3 -N | ≤5(8)mg/L | TN | ≤15mg/L |
| TP | ≤0.5mg/L | SS | ≤10mg/L |
| pH | 6～9 |
Referring to fig. 11, the whole-plant sewage treatment of the small sewage treatment plant of the embodiment adopts the process route as follows: primary treatment: grid- & gt grit chamber- & gt regulating tank- & gt secondary treatment: circulating intensive biochemical sewage treatment reaction equipment (multistage biochemical treatment) +three-stage treatment: filtering with a filter cloth, and ultraviolet sterilizing.
The domestic sewage self-defined circulating type circulation emergency treatment method provided by the embodiment comprises the following steps:
s1: a circulating intensive biochemical sewage treatment reaction device is arranged and comprises a base 61 and a concentric circle circulating reactor 60, wherein a circular outer ring guide wall 62 and an inner ring guide wall 64 which extend upwards, are distributed in concentric circles, are vertically arranged and are parallel to each other and are uniformly spaced are arranged above the base 61, 9 outer ring running water bins 67 formed by the two are sequentially provided with 9 two side edges which are connected with the outer ring guide wall 62, the inner ring guide wall 64, guide openings and flow limiting baffles with different relative heights, the numbers are sequentially 1 to 10 (corresponding to reference numerals 4 to 13), and the circular arc-shaped cavities of the outer ring running water bins 67 are divided into 9 outer ring running water bin local treatment pools which are sequentially communicated with each other, and the numbers are sequentially A to J; the inner circulation sump 68 forms an inner ring treatment pool, and each local area can be used as a sedimentation area K or a dynamically adjusted A/O area; in the support (or foundation) below the base 61, a plurality of standardized aeration modules 20 and aeration pipelines (each module is independently provided with an automatic control valve) which work independently are arranged corresponding to the lower area of each outer ring running water bin local treatment pool A-J; the aeration module 20 comprises an aeration pipe and a connecting frame which are consistent in shape, size and structure, is manufactured, installed and used for integration, is controlled by adopting an automatic control valve, can be independently opened, continuously closed or closed, and does not affect each other.
The diameter D of the outer circle of the outer ring guide wall 1 Diameter D of inner circle where inner circle guide wall is located 2 And the heights H of the outer ring guide wall and the inner ring guide wall are calculated according to the formulas 1 to 6 described in embodiment 1, and the numerical values are specifically selected within the numerical value range calculated by the foregoing formulas.
Through calculation, the height H of the inner guide wall and the outer guide wall in the embodiment can be 5-8 m;
the specific selection in this embodiment is: height H = upper segment H 1 1800 mm+middle section H 2 2500mm + lower section H 3 1700mm
＝6000mm；D2＝16m，D1＝25m。
The inner side surface of the inner circulation water bin is also provided with an annular horizontal bracket 72 which is used for supporting the side surface of each flow-limiting baffle plate forming the lower diversion trench (grooves or protruding parts can be correspondingly arranged on the flow-limiting baffle plates) and assisting in fixing each flow-limiting baffle plate; its relative height from the upper surface of the base 61 is greater than or equal to H 3 The relative height of the lower diversion trench formed by each flow-limiting baffle plate is greater than or equal to H 3 。
The local area of each inner circulation water bin 68 can be singly or cooperatively used with each local treatment pool of the outer circulation water bin to carry out secondary treatment or tertiary treatment (adding chlorine, ozone or ultraviolet radiation) on the sewage again, so that the treated regenerated water flows out of the concentric circle circulation reactor 60 from the upper part of the inner circulation water bin 68.
In this embodiment, the inner ring running water bin is provided with a convertible sedimentation area K, and a detachable central partition plate 66 is vertically arranged in the middle of the sedimentation area K and divides the sedimentation area K into two areas; an independent aeration pipe or an aeration module is arranged under the two areas, so that each part of the precipitation area K can correspondingly realize one of A, O and precipitation processes; the sewage is subjected to secondary treatment again or tertiary treatment (such as chlorination, ozone or ultraviolet radiation) by being matched with each local treatment pool of the external circulation water bin.
In the embodiment of the present invention, after the external domestic sewage (or emergency sewage) is lifted by the adjusting tank, various and multistage biochemical processes are performed in the reaction apparatus 60 of the present invention, specifically:
the sewage after primary treatment enters a concentric circle circulating reactor 60 from the upper part of the area A, sequentially passes through a local treatment pool A-B-C-D-E-F-G-H-I-J area in an outer ring running water bin, and then enters a local treatment K area through a perforated wallboard; the treated wastewater is subjected to mud-water separation through a three-phase separator at the upper part of the partial treatment K region, clear water is discharged out of the concentric circle circulating reactor 60 after being collected, and enters a subsequent external filter cloth filter unit for three-stage treatment.
In this embodiment, when the concentration of the sewage in summer is low, or the sewage with low concentration or high concentration but high biodegradability is treated, the concentric circular circulation reactor 60 is adjusted to be operated by the A/A/O process by adjusting the arc length, the deflection angle and the aeration condition of the areas A-K of the local treatment pool. The method comprises the following steps: the sewage flows through the local treatment tank A, B, C, D area without aeration, the local treatment tank A, B, C, D areas are communicated with each other to form an anaerobic reaction tank with water flow bent four times and flow length increased by about 5 times, and anaerobic treatment agent is added to fully perform anaerobic biochemical reaction to form an anaerobic section A;
when sewage flows through the area E, F, G, H, I of the local treatment tank, intermittent aeration is carried out, the E, F, G, H, I areas are communicated to form an anoxic tank with water flow bent five times and flow length increased by about 5 times, and an anoxic treatment agent is added to carry out full anoxic biochemical treatment to form an anoxic section A;
continuously aerating when sewage flows through the area J, K of the local treatment tank, and forming an aerobic tank with the water flow bent twice and the flow length increased by about 5 times after the area J, K is communicated, and adding an aerobic treatment agent to perform full aerobic biochemical treatment to form an aerobic O section;
On the upper wall plate of the inner ring guide wall 64 where the region K of the local treatment tank is connected with the region E, pumping the mixed liquid in the region K of the local treatment tank to the region E of the local treatment tank through a wall penetrating pump to realize the backflow of the mixed liquid; on the lower wall plate of the inner ring guide wall 64 where the area K of the local treatment pool is connected with the area A, sludge in the area K of the local treatment pool is pumped to the area A of the local treatment pool by a wall penetrating pump, so that sludge reflux is realized.
According to the manner and principles of the above embodiments, the process of each local treatment tank may also be adjusted, and the concentric circle circulation reactor 60 may be adjusted to operate with other processes such as a/o+a/O or a/o+a/O.
In other embodiments, the invention can also form an A/A/O/A/O+ three-phase separation process by sectional (regional) treatment and combination according to the needs according to the types and the concentrations of pollutants in the sewage, or carry out self-defined combination on the A/A/O, A/O and the three-phase separation process, correspondingly adjust the arc length of each local treatment pool (A-K) which are sequentially connected in the outer circulation sump, the diversion opening and the height of each flow-limiting baffle plate, the opening and the closing of the sedimentation area K and the aeration pipeline and the working parameters according to the selected or self-defined reaction process; for example, the ABC region is set as an anaerobic region (process A1 section) and is not aerated; the DE area is an anoxic area (a process A2 section) and is intermittently aerated; the FGH zone is an aerobic zone (process O1 section) and is continuously aerated; the IJ zone is an anoxic zone (process A3 section), and intermittent aeration is performed; the bottom of the K zone is an aerobic zone (a process O2 section) for continuous aeration; the middle of the K zone is a mud-water separation zone; the upper part of the K zone is a clear discharge zone and the like, and can be specifically adjusted and set according to actual conditions.
According to the embodiment of the invention, the concentric circle circulation type reactor 60 has higher overall denitrification efficiency, and the working condition environments of the outer circulation water bin 67 and the inner circulation water bin 68 are respectively regulated and controlled, so that the A/A/O/A/O multiple circulation biochemical treatment process can be realized, wherein the outer circulation water bin 67 can realize: the anoxic A, the anaerobic A, the aerobic O and the anoxic A, and the inner-ring running water bin 68 can realize an aerobic O+ precipitation process; in the outer ring running water bin 67, by arranging a plurality of flow limiting baffles, the oxidation ditch process can be simulated, so that the sewage flow state is more perfect, the flowing line is longer, the microbial community is richer, and the reaction is more complete; can adopt A 2 The O maturation process principle, the activated sludge method, high total microorganism participating in the reaction and more thorough reaction; the five-section Balatu process can be adopted, and the two-stage AO process is adopted, so that the water quality can stably reach the standard of the surface IV water quality; MBBR filler is put in the outer ring running water bin 67, so that the space of each local area can be fully utilized, and denitrifying dominant bacterial groups can be quickly propagated, so that the TN removal rate is higher; the internal circulation water bin 68 adopts air stripping reflux, so that air multi-purpose can be realized, and the occupied space of equipment is saved; the inner circulation water bin 68 adopts a time-sharing three-phase separation technology to separate mud, water and gas respectively, so that the energy is saved, the efficiency is high, and the space utilization rate is high; the working condition environments of the areas of the outer circulation water bin 67 and the inner circulation water bin 68 are reasonably coordinated, so that domestic sewage with different pollutant concentrations and different pollutant contents can reach or basically reach the water outlet standard of the surface IV water quality after being treated.
Example 3
The embodiment provides an optimized domestic sewage self-defined circulating type circulation emergency treatment method and equipment based on the embodiment 1-2, which is characterized in that a technical optimization scheme is further added on the basis of the embodiment 1-2, sewage in sudden water pollution events is treated, and the pollution of water bodies by organic dangerous chemicals (such as gasoline, diesel oil and the like) is taken as an example, and the specific process is combined.
In this embodiment, the concentric circle circulation reactor 60 integrally adopts a two-stage AO (AO/AO) +precipitation process, external sewage automatically flows into the reactor after being treated by an anaerobic tower, and two-stage AO biochemical treatment is performed in the concentric circle circulation reactor 60 of the present invention, and mud-water separation is realized. The implementation scheme is as follows:
the sewage enters the reaction device from the upper part of the area A of the local treatment pool, sequentially passes through the area A-B-C-D-E-F-G-H-I-J of the local treatment pool at the outer ring running water bin, and then enters the area K of the inner circulation running water bin through the perforated wall plate. The treated wastewater is subjected to mud-water separation at the upper part of the K region by a three-phase separation technology, clear water is discharged out of the reaction device after being collected, and enters a subsequent Fenton treatment unit.
In the embodiment, the area A, B, C, D of the local treatment tank is set to be intermittently aerated to form an anoxic tank; the area E, F, G, H of the local treatment tank is set to be continuously aerated to form an aerobic tank; the area I, J of the local treatment pool is set to be intermittently aerated to form an anoxic pool; and setting the K area as continuous aeration to form an aerobic tank. And the mixed liquid in the K region is pumped to the D region of the local treatment pool by a wall-penetrating pump on the upper wall plate of the internal circulation water sump connected with the A region of the local treatment pool, so that the reflux of the digestion liquid of the A/O process is realized. And concentrating the sludge at the bottom of the K region, and then discharging the sludge to a sludge concentration tank.
The process combination of the embodiment of the invention realizes that the process units of A/O+A/O+precipitation are integrated in a plurality of tanks of one reactor 60, saves the occupied area, reduces the construction cost and enables the construction of a sewage treatment station of complex wastewater multi-process combination in a narrow space to be possible.
The partial tanks of the reactor 60 in this embodiment are divided into 11 areas, a-K areas, by the flow-limiting partition, the flow-guiding wall and the base, for combining to form a physical space for realizing the a/O/a/o+ three-phase separation process. In other embodiments, the region may be divided into four regions.
And the bottom of the area corresponding to each local treatment pool is provided with an aeration device. The aeration device can be an aeration disc, an aeration pipe and other equipment for oxygenating sewage.
The aeration devices (comprising aeration modules, aeration pipes and the like) in each area are independently controlled to be opened and closed and the duration by matched self-control valves.
External water inflow is unified to enter from the top of the area A of the local treatment pool.
As an example, the local treatment tanks A, B, C zones together form an anaerobic zone (process A1 section) that is not aerated. The local treatment tank D, E zone forms an anoxic zone (process A2 stage) for intermittent aeration. The area F, G, H of the local treatment pool acts as an aerobic area (process O1 section) for continuous aeration; the local treatment tank I, J zone forms an anoxic zone (process A3 stage) for intermittent aeration. The bottom of the K zone is an aerobic zone (process O2 section) for continuous aeration. The middle of the K zone is a mud-water separation zone. The upper part of the K zone is a clear discharge zone.
The size of the aerobic zone and the anoxic zone can be adjusted by the opening and the opening quantity of the corresponding aeration devices in each local area in the reactor 60 so as to meet the treatment requirements of different waste water.
Reflux inside the reactor 60 takes the form of a wall-through pump;
diameter D of outer circle of reactor 60 1 The range of the values is as follows: 5-70m, which can be selected according to the sewage treatment flow; the pool bodies with different diameters can meet the treatment requirements of different water quality and water quantity, and the denitrification efficiency is improved. The diameter of the cell body of the reactor 60 is determined depending on the residence time required for sewage treatment. The determination of the residence time complies with the requirements relating to the design specification for outdoor drainage.
The specific values in this embodiment are: h=10000 mm, d1=23500 mm, d2=16000 mm.
When the effluent discharge index of the invention is the surface IV water body requirement, the relation between the inlet water pollutant concentration BOD, TN and the diameter of the tank body is calculated as follows:
wherein:
D 1 diameter of outer ring, unit m
V 1 Aerobic zone volume, unit m 3
V 2 Volume of anoxic zone, unit m 3
V 3 Anaerobic zone volume, unit m 3
Q is sewage treatment capacity per hour, unit m 3 /h
T: reflux coefficient, value 3, unit h
H 1 : height of outer ring, unit m
Aerobic zone volume V 1 The method comprises the following steps:
anoxic zone volume V 2 The method comprises the following steps:
anaerobic zone volume V 3 The method comprises the following steps:
V 3 ＝(1～2)Q
q-sewage treatment amount per hour, unit m 3 /h
S 0 COD concentration of the incoming water in mg/L
θ C0 Sludge age, unit d
Y t Sludge yield coefficient, unit value range 0.03-1.0
X-sludge concentration in mg/L
N K Total nitrogen concentration in mg/L of feed water
K de The denitrification rate is 0.03-0.06 unit value range.
The standardized reactor 60 with the same diameter can adjust the flow velocity and the flow of sewage flowing through each local treatment tank so as to treat the wastewater with different concentrations, and the diameter D of the excircle 1 For example, =10m, see table 3:
TABLE 3 Table 3
The technical scheme of the embodiment has the application range of emergency treatment of water pollution emergency caused by pollution of various organic chemical dangerous substances.
Example 4
The embodiment is based on embodiments 1-3, and the method and the device for self-defined circulating type circulating emergency treatment of domestic sewage provided by the embodiment of the invention are application cases of the concentric circle circulating reactor 60 adopting an A/A/O+ precipitation process, so that the concentric circle circulating reactor can treat more kinds of pollutants (including polluted water bodies of sudden water pollution events).
The method and the reaction equipment for the self-defining process of circulating intensive biochemical sewage in the embodiment are different from those in the embodiments 1 to 3 in that the working condition setting and the treatment sequence setting of each area are different:
The sewage after primary treatment enters a concentric circular circulation reactor 60 from the upper part of the area A of the local treatment pool, sequentially passes through the area A-B-C-D-E-F-G-H-I-J of the local treatment pool in an outer ring running water bin to be subjected to biochemical treatment, and then enters the area K of the inner circulation water bin to be subjected to precipitation through a perforated wall plate. The treated wastewater is subjected to mud, water and gas separation by a three-phase separator and a three-phase separation technology at the upper part of the K region, clear water is discharged out of the reaction device after being collected, and enters a subsequent Fenton treatment unit and the like.
In the reactor 60 of the embodiment, the area of the local treatment tank A, B, C, D is set to be non-aerated to form an anaerobic reaction tank; the local treatment tank E, F, G, H, I is set to be intermittently aerated to form an anoxic tank; the area J, K of the local treatment tank is set as a continuous aeration tank; the mixed liquid in the K region is pumped to the E region through a wall penetrating pump on the upper wall plate of the inner circulation sump connected with the E region, so that the mixed liquid is refluxed; and pumping the sludge in the K region to the A region through a wall penetrating pump on a wall plate at the lower part of the inner ring where the K region is connected with the A region, so as to realize sludge reflux.
The treatment process of this embodiment implements a combination of a/O + precipitation separation processes of conventional processes in one reactor 60. The reflux pipeline and the valve are reduced, the occupied area and the investment are saved, and the construction speed is improved.
According to actual needs, the flow-limiting partition plate can be moved specifically, and the arc length occupied by each local treatment pool can be adjusted, so that the flow length of the process treatment section formed by the flow-limiting partition plate is matched with the flow speed, the flow quantity and the residence time.
According to the embodiment of the invention, through a sewage treatment facility and a treatment process and a reaction device (comprising the reactor 60), the A/A/O+precipitation separation process combination of the traditional process or the process combination of other A/O+A/O+precipitation is realized, the domestic sewage with lower concentration and the domestic sewage with strong biodegradability and higher concentration can be treated, the standardization, modularization and universality of the device are greatly improved, and the manufacturing, installation and operation and maintenance costs of the device are reduced.
The middle and small sewage treatment station constructed by the invention reduces the occupied area and the construction cost of the sedimentation tank and reduces the vacant areas which are reserved among different tank bodies according to the specifications. The construction on the whole ground saves the cost and time of civil engineering excavation. The circulating loop reactor 60 and the like are prefabricated steel structures, so that the site construction speed is high, and the construction time is saved. Overall, the reactor 60 employed in this example had a total footprint of 750m for the other equipment 2 The floor area is saved by 1/3 compared with the traditional scheme, the construction period can be completed within 3 months, and the time and the investment cost are saved by at least 1/2 compared with the traditional scheme; the operation and maintenance personnel only need 3-5 people, which is reduced by more than 50% compared with the traditional technology.
Example 5
The domestic sewage self-defined circulating type circulation emergency treatment method and the domestic sewage self-defined circulating type circulation emergency treatment equipment provided by the embodiment are based on the embodiments 1-4, and the reaction equipment and the treatment process are adjusted according to the changes of the types and the concentrations of pollutants in the incoming water. The process and the reaction equipment for the circulating intensive biochemical sewage treatment of the embodiment are different from those of the embodiments 1 to 4 in that:
when TN concentration of the sewage in winter (or the sewage in emergency) is high, the concentric circle circulating reactor 60 integrally adopts an A/A/O+A/O process, and the reaction equipment is adjusted to the A/A/O+A/O process by adjusting aeration conditions of the areas A-K of the local treatment tanks, so that the denitrification efficiency is improved.
The method comprises the following steps: adjusting the local treatment tank A, B, C area to be non-aerated, and forming an anaerobic reaction tank together with each other; adjusting the area D, E of the local treatment pool to be intermittently aerated, and forming an anoxic pool after the whole area is communicated; the area F, G, H of the local treatment pool is adjusted to be continuously aerated, and the areas are communicated with each other to form an aerobic pool, so that the characteristics of the A/A/O process can be still maintained. Adjusting the area I, J of the local treatment pool to be intermittently aerated, and forming an anoxic area after the intermittent aeration and the communication; and (3) adjusting the K region of the local treatment pool to be continuously aerated to form an aerobic region, and adding a primary A/O process. The mixed liquid in the region K is pumped to the region D through a wall penetrating pump on the upper wall plate on the inner ring running water bin ring connected with the region D in the local treatment pool, so that the reflux of the digestive juice in the first-stage AO process is realized; pumping the mixed liquid in the K region to the I region through a wall-penetrating pump on the upper wall plate of the inner ring connected with the I region in the K region, so as to realize the reflux of the digestive juice of the second-stage AO process; pumping the sludge in the K region to the A region through a wall penetrating pump on a wall plate at the lower part of the inner ring, which is connected with the A region, so as to realize sludge reflux; the process combination realizes the conversion from the A/A/O process to the A/A/O+A/O process without changing the structure of the tank body, and improves the overall denitrification efficiency of the biochemical reaction equipment.
The embodiment is a specific application for flexibly operating process selection and reaction equipment adjustment according to the concentration change of the incoming water. The embodiment of the invention realizes the conversion from the A/A/O process to the A/A/O+A/O process under the condition of not changing the structure of the tank body by the cooperative cooperation of the reaction equipment and the treatment process on the basis of the embodiment 2, and improves the overall denitrification efficiency of the biochemical reaction equipment.
In the above embodiments of the present invention, a specific type of standardized equipment (equipment conforming to design rules, the same structure and dimensions) is adopted, and users can process multiple types of wastewater by customizing different equipment area functions and processing technologies; the device manufacturing, installation and operation are universal, modularized and standardized.
The invention can correspondingly select and set proper treatment processes according to different pollutant types and concentrations (especially sudden water pollution events), but main hardware equipment such as a reactor provided by the invention is standardized to manufacture, install and use, so that the problems of special customization, large site construction amount and the like of sewage treatment equipment (facilities) in the prior art are solved.
The invention also well solves the problems that the existing equipment can only be treated according to one treatment process after being manufactured, installed and operated, but the treatment process can not be flexibly adjusted according to the variety and concentration of pollutants in the incoming water and the sewage, so as to realize the balance between the treatment cost and the treatment effect, and the water quality can reach the standard easily, but the treatment cost is high, or the water quality after the treatment does not reach the standard.
The invention also solves the problems that the types and the concentrations of the pollutants in the seasonal running water are different (the types and the concentrations of the pollutants in the sewage with different sources are also different, the types and the concentrations of the pollutants with the same source are also changed greatly according to the discharge activity difference of the upstream production and life), and the equipment and the treatment process cannot be adjusted in time in a targeted manner, so that the operation and maintenance cost can be obviously reduced.
The invention can realize intensive three-stage treatment of domestic sewage (or sudden water sewage event sewage). Wherein, the primary treatment is that it removes stones, sand and stones, fat, grease and the like contained in the sewage through mechanical treatment such as grating, precipitation or air floatation. The secondary treatment is biological treatment, and pollutants in sewage are degraded and converted into sludge under the action of microorganisms. Tertiary treatment is an advanced treatment of sewage that includes nutrient removal and disinfection of the sewage by chlorine, ultraviolet radiation or ozone technology. The third-stage sewage treatment is a technological treatment process for further removing other pollution components (such as nitrogen, phosphorus, fine suspended matters, trace organic matters, inorganic salts and the like) in the sewage after the second-stage sewage treatment.
According to the invention, through actual operation tests, indexes of treated domestic sewage and emergency polluted sewage treated by each embodiment can stably reach the first class A discharge standard of pollutant discharge Standard of urban sewage treatment plant (GB 18918-2002), and basically can stably reach the standard of surface IV water.
According to the treatment method and the treatment equipment provided by the embodiment of the invention, the treatment method and the treatment equipment can be used for carrying out targeted circulating intensive treatment on wastewater with different concentrations by selecting a plurality of treatment process combinations matched with sewage under the condition of not changing the physical structure of the equipment through one standardized production reaction equipment, so that targeted emergency treatment according to different dangerous article pollution can be supported, and the occupied area, investment and operation cost are greatly reduced.
The above embodiment of the invention focuses on that through the improved design of the treatment equipment (reactor) and the internal area division and communication, the circulation direction, circulation speed and residence time of forced sewage can be flexibly adapted to each space, time period and process in the annular equipment, and different treatment process combinations can be adapted according to the quality and treatment purpose (reclaimed water or reclaimed water) of incoming water with different pollutant concentrations under the condition that the internal area division (each area space) is unchanged, the sewage is subjected to three-stage treatment after multiple circulation in the equipment (reactor), and is discharged after reaching standards. Therefore, a set of standardized and general equipment can support various treatment process combinations, the treatment process is adjusted and changed in a targeted manner according to different incoming water (seasonality), and the free combination of various denitrifying bacteria and denitrification processes in the microbial denitrification process is supported, so that the purposes of supporting targeted emergency treatment according to different dangerous article pollution, saving treatment space, treatment time, treatment cost and the like are realized.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will occur to those skilled in the art based on the foregoing disclosure, and similar technical solutions resulting from such variations or modifications are within the scope of the present invention.
Claims (10)
1. The domestic sewage self-defined circulating type circulation emergency treatment method is characterized by comprising the following steps of:
s1: setting domestic sewage self-defined circulating emergency treatment equipment: it comprises a concentric circular circulation reactor (60), a plurality of aeration modules (20) and aeration pipes (23); the concentric circle circulation reactor (60) comprises: the device comprises a base (61), a concentric inner ring guide wall (64) and an outer ring guide wall (62) which are arranged above the base (61), wherein an outer circulation water sump (67) is formed in the area between the inner ring guide wall (64) and the outer ring guide wall (62), and an inner circulation water sump (68) is formed in the inner area of the inner ring guide wall (64); a plurality of flow-limiting baffles (4-13) with different height flow-guiding openings are arranged in the outer circulation water bin (67), and each flow-limiting baffle singly or jointly divides the outer circulation water bin (67) into at least four mutually connected local areas to form a plurality of local treatment pools for enabling water flow to flow in and out in a single direction and to bend up and down; the plurality of independently working aeration modules (20) and the aeration pipes (23) are arranged in the area below the base (61), and each aeration module (20) and each aeration pipe (23) pass through the thickness of the base (61) through an aeration pipeline to reach each local treatment pool separated by the flow-limiting partition plate from the outer circulation water bin (67) and each local area of the inner circulation water bin (68);
S2: setting the working parameters of the process and each local area: according to the types and the concentrations of pollutants in the domestic sewage after being treated by a grid, a grit chamber and an adjusting tank which are arranged outside the concentric circle circulating reactor (60), one of A/O, A/O+A/O or A/O+precipitation reaction treatment processes is selected, or A/A/O, A/O and precipitation processes are subjected to custom sequencing and combination, and then according to the selected or custom reaction process, the arc length of a plurality of local treatment tanks which are sequentially connected with an outer circulation water bin (67) and the opening height of each current limiting baffle are correspondingly adjusted, and the working parameters of a Fang Baoqi module (20) under each local treatment tank are respectively corresponding to one of A, O or precipitation treatment processes of each local treatment tank of the outer ring water bin (67); setting working parameters of aeration pipes (23) corresponding to aeration pipe distribution areas (21) below all local areas in the inner circulation water bin (68), so that all local areas in the inner circulation water bin (68) also respectively correspond to one of A, O or sedimentation treatment processes;
s3: water-through and outer ring running water bin regional biochemical treatment: after the domestic sewage to be treated is subjected to primary treatment by a grid, a grit chamber and a regulating tank outside the concentric circle circulating reactor (60), the domestic sewage enters the concentric circle circulating reactor (60) for treatment through the top of a first anaerobic local treatment tank area A of an outer circulation water sump (67): enabling the water flow of sewage to enter and exit each local treatment tank along a single direction, enabling the water flow to bend up and down in each local treatment tank, controlling the opening or closing of a Fang Baoqi module (20) under each local treatment tank respectively at the moment, implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank, then bending and flowing the water again to enter the next local treatment tank to perform the next biochemical process treatment, and implementing A, O biochemical process or sedimentation process treatment corresponding to the local treatment tank by controlling the opening or closing state of a Fang Baoqi module (20) under the current local treatment tank; after the sewage sequentially passes through all the local treatment pools and the treatment pool of the outer circulation water bin (67), the treatment cycle of the outer circulation water bin (67) is completed; after finishing the treatment cycle of a plurality of outer circulation water bins (67), sewage flows into an inner ring circulation water bin (68) for continuous treatment;
S4: time-sharing biochemical treatment of the inner ring flowing water bin: after the sewage flows into the inner ring running water bin (68), the biochemical and sedimentation treatment steps are continued; respectively controlling the opening or closing of a plurality of mutually independent aeration pipes (23) arranged right below the inner circulation water bin (68), correspondingly carrying out A, O of a local area or a sedimentation treatment process, introducing oxygen into a water body right above each independent aeration module or each aeration pipe (23) to carry out an O treatment process when each independent aeration module or each independent aeration pipe (20) or each independent aeration pipe (23) is opened, carrying out an A process when each independent aeration module or each independent aeration pipe (23) is closed, and continuously closing for an interval time required by sedimentation, and carrying out a sedimentation process; after each local area is treated once, one inner ring running water bin (68) treatment cycle is completed; after the treatment circulation of the plurality of inner circulation water bins (68) is completed, the regenerated water reaches the standard and finally flows out of the concentric circle circulation reactor (60) from the upper part of the inner circulation water bins (68).
2. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 1, wherein the steps S1 and S2 further comprise the following steps:
s11: the side walls of the outer ring guide wall (62) and the inner ring guide wall (64) are respectively provided with a plurality of vertical grooves (69) which are in central radiation, are spaced and are correspondingly arranged, and the height of the positioned flow-limiting partition plate can be adjusted by the grooves when the flow-limiting partition plate is inserted into the grooves (69);
S21: according to the selected process combination and the corresponding treatment process of each local treatment pool, the flow-limiting baffle plates are vertically inserted into the corresponding grooves (69), the arc length of each local treatment pool occupying the outer circulation water bin (67), the flow-guiding opening direction and the opening height of each flow-limiting baffle plate are correspondingly adjusted, and the working parameters of the aeration module right below the flow-limiting baffle plates are combined, so that each local treatment pool of the outer circulation water bin (67) corresponds to one section of A, O, anoxic or sedimentation treatment process respectively.
3. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 1, wherein the step S1 further comprises the following steps:
s12: the outer circle diameter D of the outer circle guide wall (62) 1 Diameter D of the inner circle guide wall (64) 2 And the height H of the outer ring guide wall (62) and the inner ring guide wall (64) satisfy the following relation:
diameter of outer circle D 1 The method meets the following conditions: pi D 1 2 4*K =t×q formula 1
Diameter of inner circle D 2 The method meets the following conditions: pi D 2 2 4*K = (0.5-2) Q formula 2
At the same time: d (D) 1 /D 2 ＝1.1～2，H≥1/3*D 2 Equation 3
H＝ H 1 + H 2 + H 3 Equation 4
Wherein:
pi: circumference ratio
D 1 : diameter of outer circle, unit m
D 2 : inner diameter, unit m
K: height adjustment coefficient, the value is 1-2, unit m
T: the total residence time of sewage treatment is calculated according to the specification, and the unit is h
Q: water treatment per hour, unit m 3 /h
H: the height of the outer circulation sump guide wall and the inner ring guide wall is in unit of m;
H 1 : the height of the upper section flow guiding opening of the flow limiting baffle plate is in unit m
H 2 : middle section height of flow-limiting partition board, unit m
H 3 : the height of the diversion opening at the lower section of the flow-limiting baffle plate is in m.
4. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 1, wherein in the step S1, the method further comprises the following steps:
s13: the height H of the outer ring guide wall (62) and the inner ring guide wall (64) is equal to the upper section H 1 +middle H 2 +lower section H 3 ；
The number of the flow limiting baffles is 10, and the serial numbers of the flow limiting baffles are 1 to 10 in sequence in the outer ring running water bin (67); the first flow limiting baffle is an initial flow limiting baffle, and the area formed at the front part of the first flow limiting baffle is an external sewage inflow area; the height of each cross section of each flow limiting baffle plate and the inner ring flow guiding wall, the outer ring flow guiding wall and the base (61) in the outer ring running water bin (67) is H 1 Or H 3 Wherein the cross-section height is H 1 The flow guiding opening of (2) is an upper water trough with a section height H 3 The diversion openings of the sewage treatment device are lower water passing grooves, the upper water passing grooves and the lower water passing grooves are alternately arranged in sequence, sewage is guided to flow up and down when passing through each local treatment pool, and corresponding biochemical treatment process is implemented; the flow-limiting partition boards numbered 1, 3, 5, 7 and 9 are provided with flow-guiding openings at the upper part to form an upper water passing tank, and the flow-limiting partition boards numbered 2, 4, 6, 8 and 10 are provided with flow-guiding openings at the lower part to form a lower water passing tank.
5. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 4, wherein in the step S1, the method further comprises the following steps:
s14: the 10 flow-limiting baffles in the outer circulation water bin (67) are all arranged in a central radiation way by taking the center of the outer ring flow-guiding wall (62) as the center, wherein the flow-limiting baffles with the numbers of 1, 2, 3, 4 and 5 are respectively extended to the center of the circle in the cross section axes, and the deflection included angles formed by the extension of the cross section axes are all 22.5 degrees; the deflection included angles formed by the extension of the cross section axes of the flow limiting baffles numbered 6, 7, 8, 9 and 10 to the circle center are all 45 degrees;
the deflection included angle of each flow-limiting baffle is matched with the direction and the sectional area of the flow-guiding opening to guide the flow, so that the flow speed passing through each water-passing groove is kept at 0.02-0.2 m/s;
s15: each flow-limiting partition plate is detachably arranged between the outer ring guide wall (62) and the inner ring guide wall (64); in the step S11, grooves (69) are formed in the side walls of the outer ring guide wall (62) and the inner ring guide wall (64), and the corresponding grooves respectively have a deflection included angle of 22.5 degrees or 45 degrees;
the flow limiting baffles are set with working parameters of each local area along the vertical direction, are inserted and installed in corresponding grooves (69) according to the step S2, and the direction and the height of the opening of the water passing trough of each flow limiting baffle are adjusted in the installation process so as to adjust the speed and the depth of each section of water flow and the biochemical treatment time when the water flows through, and the flow speed and the flow rate of sewage in each local treatment pool are kept matched with the treatment process;
Relative height H of water passing trough formed by each flow limiting baffle 1 H and H 3 The following relationship is satisfied:
H 1 *(D 1 -D 2 )/2*P＝ Q S equation 5
H 3 *(D 1 -D 2 )/2*P＝ Q S Equation 6
Wherein:
D 1 : diameter of outer circle, unit m
D 2 : inner diameter, unit m
P: the flow velocity adjustment coefficient takes a value of 0.1 to 1, the unit m/s,
Q S : treated water amount per second, unit m 3 /s。
6. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 5, further comprising the following steps on the basis of the step S11:
annular outer ring guide wall clamping plates (63) which are parallel to each other are respectively arranged on the upper surface of the base (61) and surround two side walls of the outer ring guide wall (62), a positioning groove is formed between the two annular outer ring guide wall clamping plates, and the outer ring guide wall (62) is embedded in the positioning groove;
on the upper surface of the base (61), two side walls surrounding the inner ring guide wall (64) are respectively provided with annular inner ring guide wall clamping plates (65) which are parallel to each other, a positioning groove is formed between the two annular inner ring guide wall clamping plates, and the inner ring guide wall (64) is embedded in the positioning groove.
7. The domestic sewage self-defined circulation type circulation emergency treatment method according to claim 1, wherein in the step S1, the method further comprises the following steps:
s16: a central partition plate (66) is arranged on the inner circle center line of the inner circulation water bin (68), the inner space of the inner circulation water bin (68) is divided into partial areas, and then the opened and closed states of an aeration module (20) and an aeration pipe (23) which are correspondingly arranged at the lower part of each partial area are combined, so that a plurality of inner ring partial areas which are obtained after division form biochemical treatment areas or sedimentation areas which can be alternately converted into one of sedimentation tanks, sludge tanks, clean water tanks or deep treatment tanks which are alternately converted in a time-sharing way, and the flow speed is controlled, so that the sewage stays in the sedimentation tanks for alternately treatment for 0.5-3 hours.
8. The domestic sewage self-defined circulation type circulation emergency treatment equipment is characterized by comprising a concentric circular circulation type reactor (60), a plurality of aeration modules (20) and aeration pipes (23); the concentric circle circulation reactor (60) comprises: the device comprises a base (61), a concentric inner ring guide wall (64) and an outer ring guide wall (62) which are arranged above the base (61), wherein an outer circulation water sump (67) is formed in the area between the inner ring guide wall (64) and the outer ring guide wall (62), and an inner circulation water sump (68) is formed in the inner area of the inner ring guide wall; a plurality of flow-limiting baffles are arranged in the outer circulation water bin (67), and flow-limiting openings with different heights are formed among each flow-limiting baffle, the base (61), the inner ring flow-guiding wall (64) and the outer ring flow-guiding wall (62); each flow limiting baffle plate singly or jointly divides the outer ring running water bin (67) into at least four mutually connected local areas to form a plurality of local treatment pools (A-D) which enable water flow to flow in and out in one direction and bend up and down; the plurality of independently working aeration modules (20) and the aeration pipes (23) are arranged in the area below the base (61), and each aeration module (20) and each aeration pipe (23) pass through the thickness of the base (61) through an aeration pipeline to reach the local treatment tanks (A-D) separated by each flow limiting baffle plate and each local area of the inner ring running water bin (68) of the outer circulation water bin (67); the plurality of independently working aeration modules (20) and aeration pipes (23) change the treatment process of the water body in the corresponding area above the aeration modules through the working states of opening and closing; all the components are in modularized, standardized and assembled design, and are prefabricated by a factory and directly installed on site.
9. The domestic sewage custom circulation emergency treatment device according to claim 8, further comprising: the mud-water separator (16) is a three-phase separator and the deformation thereof or is in a form of combining diversion and inclined tube precipitation, the height of the mud-water separator (16) is 0.5-2 m, and the mud-water separator is a region which is partially or completely covered with an inner circulation water bin (68), and the distance between the top of the mud-water separator and the water surface is more than or equal to 0.5m.
10. The domestic sewage custom circulation emergency treatment device according to claim 8, further comprising: the effluent collector (18) is one of a triangular weir water collecting tank, a rectangular weir water collecting tank and a submerged water collecting structure.
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