CN106512465A - Integrated circulating fluidized bed for sewage nitrogen and phosphorus recycling - Google Patents
Integrated circulating fluidized bed for sewage nitrogen and phosphorus recycling Download PDFInfo
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- CN106512465A CN106512465A CN201610997601.3A CN201610997601A CN106512465A CN 106512465 A CN106512465 A CN 106512465A CN 201610997601 A CN201610997601 A CN 201610997601A CN 106512465 A CN106512465 A CN 106512465A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
- C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
Abstract
The invention provides an integrated circulating fluidized bed for sewage nitrogen and phosphorus recycling. The fluidized bed reactor for sewage nitrogen and phosphorus recycling is mainly composed of a fluidized bed, a cylindrical overflow water outlet area, a circulating water pump, a water distribution box, a rotor flow meter, circulating pipelines and valves; the fluidized bed sequentially comprises a conical crystallization area and a cylindrical crystallization and precipitation area from bottom to top, the bottom of the water distribution box is connected with the circulating water pump through a pipeline, and the rotor flow meter is arranged on a connecting pipe section; a water outlet of the circulating water pump is connected with the cone tip of a cone arranged at the bottom of the fluidized bed; the top end of the cylindrical crystallization and precipitation area is connected with a catchment cofferdam, and pores are formed in the bottom of the cofferdam to be connected with a water outlet pipe section and a return pipe section; a return pipe is connected into the water distribution box from the upper end of the water distribution box; a chemical putting system is composed of a basic magnesium carbonate dissolving tank, an ammonium chloride dissolving tank, a metering pump and a chemical adding pipeline and is connected with the lower portion of the conical crystallization area.
Description
Technical field
The present invention relates to Water Pollution Control Engineering and resource recycling technology, and in particular to a kind of to reclaim dirty simultaneously
The circulating integrated fluid bed of nitrogen phosphorus in water factory's waste water.
Background technology
Phosphorus is a kind of non-renewable, irreplaceable mineral resources, and reserves in the world have been difficult to meet future at present
The needs of social development, but a large amount of nitrogen phosphorus produced in industrial and agricultural production enter water body, cause serious water eutrophication
Change, it has also become one of main environmental issue that China faces at present.The discharge of municipal sewage is that nitrogen phosphorus enters the important way of water body
Footpath, therefore, the phosphor resource in municipal sewage is reclaimed, is had important practical significance to reducing nitrogen discharge and phosphorus discharge, environmental protection.Phosphoric acid
Ammonium magnesium crystallization technique (being commonly called as guanite method) can be while realize nitrogen reclamation of phosphorus resource and sewage disposal, with wide development and application
Prospect.The research that nitrogen phosphorus is reclaimed with regard to guanite method both at home and abroad at present is in the laboratory research stage mostly, due to the bird for generating
Gastrolith crystallization is tiny, it is difficult to be separated from water, or purity declines, and affects quality, therefore common settling apparatus are difficult to birds droppings
The stone sedimentation method reclaim nitrogen phosphorus.
The content of the invention
In order to solve the above problems, the invention provides a kind of circulating integrated fluid bed, design concept meets birds droppings
The theoretical basiss of stone crystallization granulation, promote guanite to grow up using crystal seed circulating technology, reduce alkali liquor and add expense；142L's
Dischargeable capacity can be used for the high concentration N-P wastewater treatment of Miniature Sewage Farm, factory；Can also scale up and be processed into
Suitable for Sewage Plant, the equipment of industrial product of big yield；The guanite of generation can as the agriculture slow release fertilizer of high-quality,
Market sale.
The purpose of the present invention is achieved through the following technical solutions：A kind of sewerage nitrogen and phosphor reclaims fluidized-bed reactor, main
Will be by fluid bed, cylinder overflow exhalant region, water circulating pump, distribution reservoir, spinner flowmeter, circulation line, valve composition, fluidisation
Bed is followed successively by cone crystal region and cylinder crystalline deposit area from top to bottom, and distribution reservoir bottom passes through pipeline and water circulating pump phase
Even, connection pipeline section is provided with spinner flowmeter；Water circulating pump outlet connects fluid bed bottom cone cone angle；Cone is crystallized
Settling zone top connects cofferdam of catchmenting, and perforate mouth in weir bottom is connected with water outlet, backflow pipeline section；Return duct accesses distribution reservoir from upper end；
Administration system is made up of basic magnesium carbonate drug dissolving tank, ammonium chloride drug dissolving tank, dosing pump, dosing pipe, on cylinder crystal region
Portion is connected.
Raw water water inlet pipe is accessed at the top of the distribution reservoir, overflow pipe is set in water tank side wall, away from water tank at top 1/15
Bottom 1/15 is not less than at 50mm setting distribution reservoir outlet in side wall, and external outlet pipe arranges water outlet tube valve, on an equal basis on pipe
Blow-down pipe and valve are set on height.
The fluid bed lathe bed is arranged on rectangle steelframe, uses pipeline section between cone crystal region tapered bottom end and distribution reservoir
Connection, pipeline section are provided with water circulating pump and spinner flowmeter, and water circulating pump is fixed on the crossbeam of steelframe bottom, bore bottom with fluid bed
It is close to.
The distribution reservoir outlet pipe section is connected with water circulating pump water sucking mouth, and centre is provided with joint；Recirculated water be pumped the mouth of a river and
2 sections of " several " the font vertical tube indirectly of cone crystalline deposit area cone bottom water inlet, turning is connected with 90 ° of elbows, vertical tube height
With cofferdam bottom with high, be divided to two sections, flow to conversely, the section that is connected with water pump sets spinner flowmeter, on the upper side 1/4 in the middle part of pipeline section
Place, spinner flowmeter bottom flow control valve.
Half expansion angle of the cone crystalline deposit area cone is at 15 ° or so；Edge in cone crystalline deposit area side wall
Bus and 3 sample taps are mounted equidistant, cone bottom connects tee T, and one side joint water circulating pump of threeway is exported, and run in sky for side
Pipe, evacuated tube are provided with valve.
Threeway and 2 valves are set on the external perforated pipe of the cylinder overflow exhalant region, and threeway is directly to connection 2
Current are imported the distribution reservoir by 90 ° of elbows, are completed circulation, are mounted laterally outer comb, water purification after process is delivered to subsequent treatment
Unit.
There are 7 90 ° of elbows and 2 equal tees, 6 valves on the circulation line.The cylinder overflow exhalant region
Parallel nested forms the cofferdam of catchmenting of " inner-outer sleeve cartridge type " outward appearance outside the cylinder crystal region, and bottom level is welded to circle
1/3 height on the upper side, wall perforate excessively stream, external return duct in the middle part of cylinder crystalline deposit area.
Fluid bed main part presses current flow process, is followed successively by water inlet pipe, evacuated tube, cone crystal region, circle from down to up
Cylinder crystalline deposit area, cylinder overflow exhalant region, sample tap etc. are constituted.Cone inlet port pump of the current from fluid bed bottom
Enter, with the gradually expansion of flow section, cross-sectional flow is gradually reduced, the appropriate design due to expanding angle, sewage is in from down to up
Existing difference fluidised form, the nucleation, mechanism of growing up with crystallization forming process are preferably consistent.Cylindrical crystalline deposit area design, not only
Meet crystallization mechanism, moreover it is possible to efficiently collect guanite precipitation, the high concentration N-P waste water containing configurational ion is having just enter into circular cone
Mix violent during body crystal region bottom, increase the chance of each contacted with ions, be conducive to the formation of crystallization initial stage nucleus (embryos).
Nucleus rises with current, becomes big with the covering repeatedly of outer layer precipitation.The special cone structure of fluid bed, can make on crystal
Under seethe, improve the speed of the continuous increase of crystal.The struvite crystals of last greater particle size overcome buoyancy to settle downwards, less
Granule suspend in water, continue to become big, therefore, from down to up, the guanite particle diameter generated in fluid bed is from big to small.Simultaneously
Conical surface slope is conducive to the bulky grain guanite for collecting gravitational settling.Cone inclined-plane is provided with the sampling of 3 differing heights
Mouthful, it is whether stable for the size of crystal, monitoring water quality in analysis reactor；Cylinder crystalline deposit area, lower end and cone
Crystal region is connected, and can play transitional function, effectively improve fluid circulation effect, effectively can prevent compared to square reactor
The impact at dead angle, while preventing tiny crystal from discharging with water, improves crystalline rate；The effect of cylinder overflow exhalant region is to collect
The water outlet of cylinder crystal region upper end overflow.
Cylinder overflow exhalant region is to be enclosed within the concentric column sleeve at cylinder crystal region upper end 1/3, than interior footpath simply
Big 150mm or so, is highly higher by inner core about 50mm, and outer tube bottom is closely knit with donut plate weld.Reaction corollary equipment is main
By distribution reservoir, circulating pump, spinner flowmeter, basic magnesium carbonate drug dissolving tank, ammonium chloride drug dissolving tank, agitating device, basic magnesium carbonate
Dosing pump, ammonium chloride dosing pump, pipe valve etc. are constituted.The function of distribution reservoir is tank, and water inlet pipe access in top is from dirt
The high concentration N-P waste water of water factory or factory, the such as anaerobic digestion solution in sludge area, supernatant liquid from sludge dehydration.In the side wall of water tank upper end
Overflow pipe is made unnecessary raw water overflow back standby tank, plays a part of runoff investigation when water inlet is more than volume.Blow-down pipe
50mm is not less than apart from bottom below overflow pipe, evacuated tube and scum pipe can be also served as, valve is set on blow-down pipe.Distribution reservoir goes out
The mouth of a river positioned at the height of bottom 1/15, external water distribution pipeline and water control valve.
Basic magnesium carbonate drug dissolving tank, ammonium chloride drug dissolving tank be used for configure generate guanite required for magnesium source, nitrogen source because
Raw water contains finite concentration nitrogen phosphorus and magnesium ion, but does not meet the optimal proportion of guanite generation, for the purpose of reclaiming phosphorus, because
This requires supplementation with and adds a certain amount of nitrogen source and a large amount of magnesium sources.Basic magnesium carbonate [(MgCO3) 4 Mg (OH), 2 5H2O] can tribute
Certain OH- is offered, and without the need for water inlet pH value to needed for reacting 8～9 being adjusted with NaOH, saves what a large amount of adding of agent were brought
Expense, while ammonium chloride drug dissolving tank can be selected by water quality situation.The molten medicine device of stirring is provided with drug dissolving tank, motor drives slurry
Plate by add into solid chemicals scratch, stir, basic magnesium carbonate is micro-soluble material, formed dirty solution, bottom arrange valve,
Connection dosing pump, medicament quantitatively, is slowly added in fluidized-bed reactor.
Water distribution pipeline and circulation line are connected to the upper and lower side of distribution reservoir and fluid bed, and water distribution pipeline arises from distribution reservoir water outlet
Mouthful, centre terminates in fluid bed water inlet through flow control valve, water circulating pump, spinner flowmeter, inverse u shape pipeline.Flow control
Valve processed immediately distribution reservoir, controls distributed water flow, so as to the hydraulic detention time of raw water in indirect control fluid bed.Water circulating pump will
Raw water squeezes into fluid bed, there is provided the power of circulation.Can be with the cross-sectional flow of Theoretical Calculation fluid bed, favorably by spinner flowmeter
In controling effectively to course of reaction.Inverse u shape pipeline be for the ease of effusion meter install, prevent quiet heavy when fluid bed in water
It is back to distribution reservoir and designs, is divided into flow tube and down-pipe.Water distribution pipeline is connected with fluid bed water inlet threeway, is led directly to another
Side is installed by blow-down pipe.
Circulation line arises from fluid bed cylinder overflow exhalant region, and centre terminates in distribution reservoir through drain pipe.Exhalant region is pacified
Dress perforated pipe, external return duct are installed threeway and separate drain pipe, lead to distribution reservoir on return duct, water after completing to process
Backflow, the struvite crystals carried in water continue to enter fluidized bed participation reaction by distribution reservoir as induced nuclei, and drain pipe is used
Carry out emission treatment water outlet up to standard, drain valve is set on pipeline section.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the circulating integrated fluid bed of the present invention.
In figure：1st, distribution reservoir, 2, raw water water inlet pipe, 3, water inlet tube valve, 4, overflow pipe, 5, evacuated tube, 6, distribution reservoir goes out
The mouth of a river, 7, water outlet tube valve, 8, water circulating pump, 9, flow control valve, 10, upper flow tube, 11, spinner flowmeter, 12, down-pipe,
13rd, fluid bed water inlet, 14, blow-down pipe, 15, cone crystal region, 16, cylinder crystalline deposit area, 17, cylinder overflow goes out
Pool, 18, sample tap, 19, downflow weir, 21, perforated pipe, 22, return duct, 23, drain valve, 24, drain pipe, 25, backflow pipe valve,
26th, basic magnesium carbonate drug dissolving tank, 27, ammonium chloride drug dissolving tank, 28, molten medicine agitating device, 29, basic magnesium carbonate dosing pump, 30, chlorine
Change ammonium dosing pump.
Specific embodiment
The present invention is further described with reference to embodiment.
1 periodic running of embodiment
For the nitrogen phosphorus waste water of the little water yield, fluid bed adopts periodic running mode, and current are interior circulation in form.When
When processing up to standard, fluid bed itself is carried out guanite and is separated with water as sedimentation tank.Specific implementation process is：
As shown in figure 1, a kind of sewerage nitrogen and phosphor reclaims fluidized-bed reactor, and mainly by cylinder overflow exhalant region 17, fluidisation
Bed, water circulating pump 8, distribution reservoir 1, spinner flowmeter 11, circulation line, valve composition, it is characterised in that：Fluid bed is from top to bottom
16 cone crystalline deposit area 15 of cylinder crystal region is followed successively by, 1 bottom of distribution reservoir is connected with water circulating pump 8 by pipeline, even
Nozzle belt is provided with spinner flowmeter 11；8 outlet of water circulating pump connects fluid bed bottom cone cone angle；Cone crystallization is heavy
15 top of shallow lake area connects cofferdam of catchmenting, and perforate mouth in weir bottom is connected with water outlet, 22 sections of return duct；Return duct 22 accesses water distribution from upper end
Case 1；Administration system is made up of basic magnesium carbonate drug dissolving tank 26, ammonium chloride drug dissolving tank 27, dosing pump, dosing pipe, with cylinder
16 top of crystal region is connected.
Raw water water inlet pipe 2 is accessed at the top of the distribution reservoir 1, overflow pipe 4 is set in water tank side wall, away from water at top 1/15
Bottom portion 1/15 is not less than at 50mm in side wall and arranges distribution reservoir outlet 6, and external outlet pipe arranges water outlet tube valve 7 on pipe,
Blow-down pipe 5 and valve are set in equal height.
The fluid bed lathe bed is arranged on rectangle steelframe, is used between 15 tapered bottom end of cone crystal region and distribution reservoir 1
Pipeline section connects, and pipeline section is provided with water circulating pump 8 and spinner flowmeter 11, and water circulating pump 8 is fixed on the crossbeam of steelframe bottom, with stream
Change bed cone bottom to be close to.
1 outlet pipe section of the distribution reservoir is connected with 8 water sucking mouth of water circulating pump, and centre is provided with joint；Recirculated water is pumped the mouth of a river
With 2 sections of " several " the font vertical tube indirectly of the cone bottom water inlet of cone crystalline deposit area 15, turning is connected with 90 ° of elbows, vertical tube
Height and cofferdam bottom be divided tos two sections with high, and flow direction is conversely, the section that is connected with water pump sets spinner flowmeter 11, inclined in the middle part of pipeline section
At upper 1/4,11 bottom flow control valve 9 of spinner flowmeter.
Half expansion angle of 15 cone of cone crystalline deposit area is at 15 ° or so；15 side wall of cone crystalline deposit area
On 3 sample taps, 18 cone bottom be mounted equidistant along bus connect tee T, the outlet of one side joint water circulating pump of threeway, a side joint
Evacuated tube 14, evacuated tube is provided with valve.
Threeway and 2 valves are set on the external perforated pipe 21 of the cylinder overflow exhalant region 17, and threeway is directly to connection 2
Current are imported the distribution reservoir 1 by individual 90 ° of elbows, are completed circulation, are mounted laterally outer comb, water purification after process is delivered to subsequently
Processing unit.
There are 7 90 ° of elbows and 2 equal tees, 6 valves on the circulation line.
17 parallel nested of cylinder overflow exhalant region is formed " inner-outer sleeve cartridge type " outside the cylinder crystal region 16
The cofferdam of catchmenting of outward appearance, bottom level be welded in the middle part of cylinder crystalline deposit area it is on the upper side 1/3 height, wall perforate excessively stream, outward
Take back flow tube 22.
Sewerage nitrogen and phosphor of the present invention reclaims the operation control technology of circulating integrated fluid bed：Preparatory stage, startup rank
Section, operation phase, precipitation water outlet stage, guanite collection phase.
Preparatory stage is：Distribution reservoir water outlet tube valve 7, fluid bed blow-down pipe 14, drain valve 23 are closed, flow-control is opened
Valve 9, backflow pipe valve 25.First by commercially pure basic magnesium carbonate, ammonium chloride (difference magnesium source, material etc. may be selected) by expense
Basic magnesium carbonate drug dissolving tank 26 is knocked down respectively, and ammonium chloride drug dissolving tank 27 adds appropriate tap water, starts molten medicine agitating device motor
28, medicament is stirred, mixing time continues 30min, allows basic magnesium carbonate to be partly dissolved.Then water inlet tube valve 3 is opened,
Sewage Plant anaerobism section water outlet, supernatant, workshop water outlet of factory's high concentration N-P waste water etc. between sludge digestion tank water outlet, sludge dewatering
Distribution reservoir 1 is delivered to through raw water water inlet pipe 2, excessive raw water Jing overflow pipe 4 enters standby tank, closes water inlet tube valve
3, into startup stage.
Startup stage is：ON cycle water pump 8, raw water by water outlet tube valve 7, water circulating pump 8, flow control valve 9, on
Flow tube 10, spinner flowmeter 11, down-pipe 12, fluid bed water inlet 13 enter fluidized bed cone crystal region 15.On the water surface
When rising, basic magnesium carbonate dosing pump 29 and ammonium chloride dosing pump 30 are opened, total dispensing is calculated according to the chresard of distribution reservoir 1
Amount, controls dosing flow so that when water starts overflow, just complete feeding operations, allow solution to be slowly added in ascending current, by
In the effect that is stirred vigorously of bottom, struvite crystals start to generate, simultaneously because the slow mechanism dissolved property of basic magnesium carbonate, will not
A large amount of tiny struvite crystals are generated because ion concentration local is too high, it is suppressed that crystal is grown up.Rotary water-out pipe valve
The opening degree of door 7 and flow control valve 9, observes 11 reading of spinner flowmeter, adjusts to necessary flow and record.With raw water and
Medicament mixed liquor is full of cone crystal region 15, and flow-shape changes, and result in the violent disorderly of fluidised form due to expanding angle presence
Dynamic, there is vortex near taper expansion arm of angle wall in order to adjust in streamline, and is mingled with the bubble of water pump suction, integrated condition effect
Contributing to the oarse-grained generation of guanite, and disperseing with current, smaller particle is floated up to and cylinder crystalline deposit flowed through when current
Area 16, flow velocity tends to be steady, and is that tiny struvite crystallization is grown up and creates gentle environment, there is knot between little particle crystal
Site is closed, mutually polymerization, adhesion is finally grown up.The bulky grain of formation continues to overcome buoyancy to sink, and in small, broken bits entering with current is justified
Cylinder overflow exhalant region 17, when water overflow, closes basic magnesium carbonate dosing pump 29 and ammonium chloride dosing pump 30, completes to start rank
Section, into the operation phase.
Operation phase：When the mixed liquor in fluid bed climbs over downflow weir, conflux in ring-type gathering ground, through perforated pipe 21,
Into return duct 22, current directly enter distribution reservoir 1 by the pipe valve 25 that flows back, and start to circulate for the first time.From the beginning of during water overflow
Timing, fluidizes bed operating 2h, can according to circumstances every certain hour sample analysis water quality.In the operation phase, with struvite crystals
Be continuously generated, in raw water, nitrogen and phosphorus content is constantly reduced, due to contribution of the basic magnesium carbonate to pH, can maintain pH science, reason
Within the scope of thinking, with reference to external pertinent literature, constantly regulate pH can allow struvite crystals constantly to be grown up, in this example
Confirmed.
The precipitation water outlet stage：When stable effluent quality, water circulating pump 8,14 valve of blow-down pipe, water outlet pipe valve are closed successively
Door 7, flow control valve 9, it is quiet heavy to start termination of pumping, there is certain digestion time here, namely dispersed crystallites continue the mistake grown up
Journey, now, guanite is separated with water by fluid bed as sedimentation tank.Quiet heavy 30min, opens 14 valve of blow-down pipe, after processing
Water phosphorus concentration is very low, is suitable for being back to biochemistry pool or next technique unit, or directly discharges.
Guanite collection phase：The struvite crystallization brush on wall is swept into collection with hairbrush, or supporting half is installed certainly
Dynamic collection device.The guanite of collection is encapsulated with woven bag.
2 continuous way of embodiment is run
For the situation of continuum micromeehanics, the embodiment of the fluid bed is changeable to be run for continuous way, concrete operation method
For：
Remove distribution reservoir 1, fluid bed water inlet 13 fetches the high concentration N-P waste water from Sewage Plant workshop, water Jing after process
Perforated pipe 21 is crossed, into return duct 22, current are divided into two-way, water outlet all the way enters backflow pipe valve 25, carries guanite granule and returns
Stream continues crystallization, pelletize；Another road water outlet flows through drain pipe 24, is linked into sedimentation tank, and what this flowed away with water all the way is little particle
Guanite, in sedimentation tank realizes collecting.The greater particle size guanite remained in fluid bed can be deposited on wall, wait to run
Guanite collection phase is entered after end.But it is different from embodiment 1, need to be equipped with special precipitation under this method of operation
Pond, for the ease of applying in practice, sedimentation tank also needs to set up guanite backflow of particles device, and accesses from water inlet 13, allows
The reaction in fluid bed is continued to participate in as induced nuclei through the guanite of ageing process particle diameter increase.
Except excessively above-mentioned operation characteristic, the preparatory stage of fluid bed continuous way operation control technology, startup stage, guanite
Collection phase is essentially identical with periodic running.Need to do an explanation, continuous way operates in the chemical feeding quantity of preparatory stage will
Persistently supply, because drug dissolving tank 26,27 limited volumes, it should calculate the supply cycle of drug dissolving tank, scientifically control whole dosing
Process.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (8)
1. a kind of sewerage nitrogen and phosphor reclaims fluidized-bed reactor, mainly by cone fluid bed (15,16), cylinder overflow exhalant region
(17) water circulating pump (8), distribution reservoir (1), spinner flowmeter (11), circulation line, valve composition, it is characterised in that：Fluid bed
Cone crystal region (15) cylinder crystalline deposit area (16) is followed successively by from top to bottom, and distribution reservoir (1) bottom passes through pipeline and follows
Ring water pump (8) is connected, and connection pipeline section is provided with spinner flowmeter (11)；Water circulating pump (8) outlet connection fluidized-bed bottom circle
Cone cone angle；The connection of cylinder crystalline deposit area (16) top is catchmented cofferdam, outside and annular water outlet water leg (17) under weir, returns
Flow tube (22) section is connected；Return duct (22) accesses distribution reservoir (1) from upper end；Administration system by basic magnesium carbonate drug dissolving tank (26),
Ammonium chloride drug dissolving tank (27), dosing pump, dosing pipe composition, are connected with cone crystal region (15) bottom；The distribution reservoir (1)
Raw water water inlet pipe (2) is accessed at top, is not less than at 300mm height away from top in water tank side wall and is arranged overflow pipe (4), away from water tank bottom
Portion 1/15 is not less than at 50mm in side wall and arranges distribution reservoir outlet (6), and external outlet pipe arranges water outlet tube valve (7) on pipe,
Blow-down pipe (5) and valve are set in equal height, and the fluid bed lathe bed is arranged on rectangle steelframe, cone crystal region (15)
It is connected with pipeline section between tapered bottom end and distribution reservoir (1), pipeline section is provided with water circulating pump (8) and spinner flowmeter (11), is circulated
Water pump (8) is fixed on the crossbeam of steelframe bottom, is close to fluid bed cone bottom.
2. fluidized-bed reactor according to claim 1, it is characterised in that：Distribution reservoir (1) outlet pipe section and circulation
Water pump (8) water sucking mouth is connected, and centre is provided with joint；Recirculated water is pumped between the mouth of a river and cone crystal region (15) cone bottom water inlet
Connect 2 sections of " several " font vertical tube, turning is connected with 90 ° of elbows, vertical tube height and cofferdam bottom be divided tos two sections with high, flow to conversely,
The section that is connected with water pump sets spinner flowmeter (11), on the upper side 1/4 in the middle part of pipeline section at, spinner flowmeter (11) bottom flow-control
Valve (9).
3. fluidized-bed reactor according to claim 1, it is characterised in that：Cone crystal region (15) cone
Half expands angle at 15 ° or so；3 sample taps (18), cone bottom is mounted equidistant along bus in cone crystal region (15) side wall
Portion connects tee T, and one side joint water circulating pump of threeway is exported, and run in blank pipe (14) for side, and evacuated tube is provided with valve, can be heavy
The big crystal for forming sediment, the magnesium ammonium phosphate sediment granule for reclaiming are discharged and are reclaimed.
4. fluidized-bed reactor according to claim 1, it is characterised in that：Ring on the outside of the cylinder overflow exhalant region
The external perforated pipe (21) of shape water outlet water leg (17), then connect with return duct (22), threeway and 2 are set on return duct (22)
Current directly to 2 90 ° of elbows of connection, are imported the distribution reservoir (1) by valve, threeway, are completed circulation, are mounted laterally outer comb,
Water purification after process is delivered to into subsequent processing units.
5. fluidized-bed reactor according to claim 1, it is characterised in that：Have on the circulation line 7 90 ° of elbows and
2 equal tees, 6 valves.
6. fluidized-bed reactor according to claim 1, it is characterised in that：Ring on the outside of the cylinder overflow exhalant region
Shape water outlet water leg (17) parallel nested outward, forms the collection of " inner-outer sleeve cartridge type " outward appearance in the cylinder crystalline deposit area (16)
Water cofferdam, bottom level are welded to 1/3 height on the upper side, cylinder crystalline deposit area (16) in the middle part of cylinder crystalline deposit area (16)
Top is provided with triangular-notch weir, crosses water by overflow, and annular water outlet water leg (17) is fallen in water outlet, and annular water outlet water leg (17) is external
Return duct (22).
7. a kind of operating procedure of the sewerage nitrogen and phosphor recovery fluidized-bed reactor described in claim 1 is：Preparatory stage, startup rank
Section, operation phase, collection phase, the preparatory stage is：Close distribution reservoir water outlet tube valve (7), fluid bed blow-down pipe (14), draining
Valve (23), opens flow control valve (9), backflow pipe valve (25), and commercially pure basic magnesium carbonate, ammonium chloride are pressed expense first
Basic magnesium carbonate drug dissolving tank (26) is knocked down respectively, and ammonium chloride drug dissolving tank (27) adds appropriate tap water, starts molten medicine agitating device
Motor (28), medicament is stirred, and mixing time continues 30min, allows basic magnesium carbonate to be partly dissolved, then opens water inlet pipe
Valve, will supernatant, factory's high concentration N-P give up including Sewage Plant anaerobism section water outlet, between sludge digestion tank water outlet, sludge dewatering
Water outlet between waterwheel is delivered to distribution reservoir (1), excessive raw water Jing overflow pipe through raw water water inlet pipe (2) in interior treatment sewage
(4) into standby tank, water inlet tube valve (3) is closed, into startup stage；
Startup stage：ON cycle water pump (8), raw water by water outlet tube valve (7), water circulating pump (8), flow control valve (9),
Upper flow tube (10), spinner flowmeter (11), down-pipe (12), fluid bed water inlet (13) enter fluidized bed cone crystal region
(15), when the water surface rises, basic magnesium carbonate dosing pump (29) and ammonium chloride dosing pump (30) are opened, according in distribution reservoir (1)
Water quality calculates total dosage with inflow, controls dosing flow, rotary water-out tube valve (7) and flow control valve (9) on demand
Opening degree, observe spinner flowmeter (11) reading, adjust to necessary flow and record, when the mixed liquor in fluid bed climb over it is excessive
Stream weir, confluxes in ring-type gathering ground annular water outlet water leg (17), and through perforated pipe (21), into return duct (22), current are straight
Backflow pipe valve (25) was connected into distribution reservoir (1), is started to circulate for the first time, is started timing when water overflow, fluidize bed operating
2h, completes startup stage；
Operation phase：Water inlet tube valve (3), drain valve (23) and blow-down pipe (14) valve are opened, is in system and is back to back
Water state.In running, fluid bed cone crystal region (15) forms struvite crystals, it is lower it is fast slow upflow velocity punching
Hit down, crystal is constantly seethed up and down, crystal foreign body surface constantly has new crystallization adhesion, goes from strength to strength, it is last periodically along emptying
Pipe (14) interval is discharged, and is collected after concentration；Waste water after concentration of nitrogen and phosphorus reduces in system, as drain pipe (24) is discharged.Operation
During, to control to pass in and out the water yield unanimously, water circulation control will reach more than 2h with the hydraulic detention time in fluid bed.Put
When blank pipe (14) discharges struvite crystals, water circulating pump (8) and water outlet tube valve (7) are closed.
8. fluidized-bed reactor according to claim 1, the basic magnesium carbonate of selection is relative to the soluble magnesium such as MgSO4 source
Advantage is had more in a fluidized bed reactor, and sl. sol. fine particle participates in formation and the length of struvite crystals as ready-made nucleus
Big process, can improve the crystallization effect of fluid bed, contribute to forming bigger guanite granule, be easy to sedimentation.
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