Water resource is most important resource for the survival of mankind, however as increasing for China's expanding economy and population,
The aggravation of water pollution, the contradiction between water and people is more prominent, how preferably to be had become using water resource, water conservation
One of our urgent problems to be solved.Sewage treatment plant as sewage treatment most important facility increasingly by the pass of people
Note, the effect for giving full play to sewage treatment plant just can effectively reduce the pressure of water environment, realize resource environment sustainable development.
Common sewage treatment process such as Chinese patent literature CN207943922U is disclosed on October 9th, 2018 " based on AB work
The sewage disposal system of skill realization energy regenerating ", comprising: section aeration tank grid, setting pot, A, sedimentation basin, anaerobic pond, anoxic
Pond, aerobic tank, the second sedimentation basin, sludge thicking dewatering equipment, sludge digesting unit and biogas storage tank, each pond body connect by the road
At the processing system for being able to achieve AB technique.The processing system is by being arranged the grid of organic linking, setting pot, A sections of aeration tanks, sinking
Shallow lake pond, anaerobic pond, anoxic pond, aerobic tank, the second sedimentation basin, sludge thicking dewatering equipment, sludge digesting unit and biogas storage tank,
Optimal improvements B segment process realizes that the sludge generated while sewage denitrification and dephosphorization to two sections of biochemical methods is concentrated, be dehydrated, detested
Oxygen digestion realizes that the maximization of energy recycles, reduces the energy consumption of sewage treatment plant, realize sewage treatment plant's energy-saving and emission-reduction
Consumption reduction.Currently, the execution standard of water process discharge is by original " urban wastewater treatment firm pollutant emission standard " GB18918-
Level-one B standard in 2002 is promoted to level-one A or higher standard, and the municipal sewage plant of aforementioned conventional is due to design original
Cause, original processing unit have been unable to satisfy higher discharge standard.If pushing over existing utility to build again, it is clear that in economy
Cost and demand is unable to satisfy on the construction period.It is necessary to install corresponding processing module additional on original sewage treatment unit, with
Promote processing capacity and treatment effect.
Summary of the invention
In order to overcome the above technical problems, the utility model provides a kind of clarification of magnetic-coagulation and denitrification filter pool combined type
Sewage-treatment plant may be provided at the rear of traditional wastewater processing unit, to by traditional approach, treated that water is carried out into one
The dephosphorization of step denitrogenates processing, reaches higher discharge standard, meets higher emission request.
In order to realize goal of the invention, the utility model adopts the following technical solution: a kind of clarification of magnetic-coagulation is filtered with denitrification
Pond combined type sewage treatment equipment, positioned at the end of waste water processes, the first processing including being arranged according to upstream and downstream sequence is single
Member and the second processing unit, first processing units include the mixed zone for the dosing coagulant being arranged according to upstream and downstream sequence, add magnetic
The flocculation zone and settling zone that the magnetic powder of powder adds area, adds flocculant；Mixed zone, magnetic powder add between area and flocculation zone with overflow
Plate separates, in the middle part of the bottom side open communication to the side of settling zone of flocculation zone；The second processing unit includes the anti-of upstream side
Filter tank is nitrified, the upstream of denitrification filter pool is connected to the downstream of settling zone, the downstream connection backwash clear water reserviors of denitrification filter pool.
Magnetic-coagulation clarification and the denitrification filter pool combined type sewage treatment equipment of this programme design, are mostly installed at sewage
The end of the existing processing links of factory is managed, sewage so far has been completed almost all of processing step, only after the processing of preceding road
Nitrogen, phosphorus processing on it is not yet up to standard.The present apparatus includes former and later two processing units, and first processing units are that magnetic-coagulation clarification is single
Member, mainly for processing phosphorus is exceeded, the second processing unit is denitrification processing unit, mainly for processing nitrogen is exceeded.This programme
First processing units successively include that mixed zone, magnetic powder add area, flocculation zone and settling zone from upstream to downstream, wherein mixed zone
Dosing coagulant sharply, adequately mixes with the substances such as suspended matter, colloid generation in raw water, makes elimination of colloid stability and form wadding body.
Magnetic powder adds and adds magnetic powder in area, while high concentration sludge backflow being cooperated to form sludge trapping layer, increases wadding body specific gravity and promotes it
Rapid precipitation.Flocculant is added in flocculation zone, the tiny wadding body contact-impact for generating mixed process forms biggish wadding body
Grain.It handles water in settling zone to flow from bottom to top, wadding body is precipitated downwards by gravity, interferes mutually, does in precipitation process
It disturbs, forms an entirety and precipitate downwards, form clearly solid liquid interface between primary water, realize mud-water separation, primary water is logical
Cross the overflow weir overflow water outlet of pond top.Sewage removes most of phosphorus, suspended matter and partial organic substances by first processing units.The
The upstream of two processing units is denitrification filter pool, and the upstream of denitrification filter pool is connected to the downstream of settling zone, denitrification filter pool
Downstream connection backwash clear water reserviors.Denitrification filter pool unit is the processing unit for collecting biological denitrificaion and filtering function and being combined into one, can
Remove SS, TN.By the processing of denitrification filter pool unit, the nitrogen index of sewage is also up to standard, can be arranged safely by backwash clear water reserviors
It puts.Wherein, the mixed zone of first processing units, magnetic powder, which add, is separated between area and flocculation zone with overflow plate, the bottom of flocculation zone
In the middle part of side open communication to the side of settling zone, such design can be such that the water containing floc particle realizes in settling zone
Effectively upper lower leaf.
Preferably, the bottom of settling zone is equipped with sludge collecting region, sludge collecting region is connected to by pipeline, valve and pump
Magnetic powder adds area.Floc particle is gradually precipitated to the sludge collecting region of bottom after entering settling zone, these sludge and magnetic powder
Mixture can be collected, and after being separated magnetic powder with sludge by necessary means, magnetic powder is added to magnetic powder again and adds
In area, sludge centrally disposes after then collecting.Such design can reduce the loss of magnetic powder, reduce processing cost.
Preferably, mixed zone, magnetic powder add area, are equipped with blender in flocculation zone.Blender can increase water body and disturb
It is dynamic, accelerate reaction speed, improves treatment effeciency.
Preferably, being equipped with mud scraper in settling zone.The sludge gathering speed of settling zone bottom can be improved in mud scraper.
Preferably, the downstream of denitrification filter pool is also connected with backwash waste pond, backwash waste pond by pipeline, valve and
Pump is connected to the front end of waste water processes.Backwash waste pond can be used for storing backwash waste, and come back to front-end processing
System realizes the zero-emission of whole system.
Preferably, be provided with filter material layer in denitrification filter pool, the filter material layer be the quartz sand that partial size is 2 ~ 4mm and/
Or partial size is the natural cobblestone of 8 ~ 40mm.The quartz sand and/or natural cobblestone for selecting appropriate particle size do filtrate, material cost
It is low, easy cleaning.
Preferably, denitrification filter pool is provided with the backwash module backwashed to filter material layer.It is logical to backwash module
Piping is passed through clear water and/or compressed air, is rinsed to filter material layer, removes the solids of retention, keeps filter material layer again extensive
Multiple optimal filter effect.Clear water can come from backwash clear water reserviors, and compressed air can come from compressor, then be equipped with necessary
The facilities such as pipeline, pump, rinse jet can be specifically arranged on demand by those skilled in the art.
In conclusion the beneficial effects of the utility model are: may be provided at the rear of traditional wastewater processing unit, to process
Traditional approach treated water carries out further dephosphorization and denitrogenates processing, reaches higher discharge standard, meets higher discharge
It is required that.
Embodiment is a kind of clarification of magnetic-coagulation and denitrification filter pool combined type sewage treatment equipment, is applied in certain sewage treatment
The sewage treatment process end of factory.As shown in Figure 1, the magnetic-coagulation clarification of this example is filled with the processing of denitrification filter pool combined-type sewage
It sets, including the first processing units 1 and the second processing unit 2 being arranged according to upstream and downstream sequence.First processing units include according to upper and lower
The mixed zone 11 of the dosing coagulant of trip sequence setting adds the flocculation zone 13 that the magnetic powder of magnetic powder adds area 12, adds flocculant
With settling zone 14.The second processing unit includes the denitrification filter pool 21 of upstream side, and the upstream of denitrification filter pool is connected to settling zone
Downstream, the downstream connection backwash clear water reserviors 22 of denitrification filter pool and backwash waste pond 23.
Mixed zone, magnetic powder, which add, to be separated between area and flocculation zone with overflow plate, and the bottom side open communication of flocculation zone is extremely
In the middle part of the side of settling zone.Mixed zone, magnetic powder add area, are equipped with blender in flocculation zone.It is equipped with mud scraper in settling zone, sinks
The bottom in shallow lake area is equipped with sludge collecting region 141.The floc particle of flocculation zone is deposited in sludge collecting region, by pipeline, valve and
Pump is connected to separation equipment, and the magnetic powder isolated adds area in magnetic powder again and comes into operation.
Filter material layer 211 is provided in denitrification filter pool, the filter material layer internal layer of this example is the quartz sand that partial size is 2 ~ 4mm, outside
Layer is the natural cobblestone that diameter is 8 ~ 40mm.Before backwash waste pond is connected to waste water processes by pipeline, valve and pump
End the processing equipment to front end can carry out necessary flushing in due course.Denitrification filter pool setting backwash module, backwashes module packet
Include pipeline, water pump, air pump and rinse jet.Water source is derived from backwash clear water reserviors, and gas source is provided by air compressor machine.
Water quality comparison before the processing of the present embodiment is as follows:
The present embodiment treated Water quality comparison is as follows:
|Quasi- IV class of surface water water outlet
||≤ 1.5(2.5) *
||≤ 12(15) *
* numerical value is to limit to discharge in 31 days March next year annual December 1 in bracket.