CN103539318A - Air flotation biological filter tank integrated equipment and control method thereof - Google Patents
Air flotation biological filter tank integrated equipment and control method thereof Download PDFInfo
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- CN103539318A CN103539318A CN201310524088.2A CN201310524088A CN103539318A CN 103539318 A CN103539318 A CN 103539318A CN 201310524088 A CN201310524088 A CN 201310524088A CN 103539318 A CN103539318 A CN 103539318A
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Abstract
The invention relates to the technical field of water treatment, in particular to air flotation biological filter tank integrated equipment and a control method thereof; the equipment comprises an air floatation tank; the air floatation tank comprises an inner cylinder and an outer cylinder arranged outside the inner cylinder; the outer cylinder is higher than the inner cylinder; a water inlet is formed at the bottom or lower wall of the inner cylinder and connected with a raw water inlet pipe; a dissolved air water inlet pipe is introduced on the top of the inner cylinder and is stretched into the inner cylinder; a biological filler is arranged in the annular space between the inner cylinder and the outer cylinder so as to carry out biological filtering treatment of a water body subjected to air floatation treatment; a water outlet is formed at the bottom or lower wall of the outer cylinder and connected with an external pipe; a slag discharging hole is arranged in the part, which is higher than the top of the inner cylinder, of the interior of the outer cylinder; the slag discharging hole is connected to the exterior of the outer cylinder through a slag discharging pipe so as to discharge floatation slag. The integrated equipment and the control method thereof disclosed by the invention have the advantages of being good in water treatment effect, high in automation degree and easy for operation; the integrated equipment is simple in structure.
Description
Technical field
The present invention relates to water-treatment technology field, particularly a kind of air supporting biological filter integration apparatus and control method thereof.
Background technology
At present air flotation technology is widely used in feedwater, the purifying treatment of low temperature, low turbid, algae body especially, and municipal effluent and Industrial Wastewater Treatment.In air-float water treating processes, particulate matter is mainly to remove one of object, and the colloid electrical potential energy in particle removal process and reactive force are subject to Effect of Electric Double Layer power, gravitation, repulsion and hydration power joint effect.In addition, interface is also subject to the impact of the factors such as hydrophobic effect, surface tension, tensio-active agent.
Air flotation technology application has its limitation, is in particular in that the former water that is applicable to dissolved air flotation process requires that humus content is higher or cosmochrome is higher, eutrophication, algae content is higher, turbidity is lower or even the former water of low-temperature and low turbidity.Dissolved air flotation process has almost similar effect with depositing technology, but treatment effect is subject to raw water turbidity, impact is larger, and the former water of turbidity >100 NTU is not suitable for dissolved air flotation process.In addition, air flotation technology also there is complex process, control that parameter is many, operation cost is high, power consumption is large, to shortcomings such as process management personnel have relatively high expectations.
Biofiltration originates in 20 century 70s, refers to cultivate microbial film at conventional rapid filter filter material surface, makes filter tank when keeping traditional rapid filter filtration capacity, by the Degradation of microorganism, removes preferably underwater micro-organic matter.Research shows, the biological rapid filter of usining is processed as final stage, can obtain low turbid and have a water outlet of biologically stable.
Biological filtering tank process has its limitation, it is mainly the practical problems causing around biological growth characteristic, more such as influence factor, operational administrative is difficult to the limitation such as standard, random large, filter tank Aquatic organisms, the wholesomeness of effluent quality and the research of process mechanism is insufficient, the effect that also has the such environmental effects biological filters such as seasonal climate to process in addition.
Summary of the invention
The object of the present invention is to provide a kind of air supporting biological filter integration apparatus and control method thereof, this integration apparatus and control method thereof not only water treatment are effective, and level of automation is high, and simple in structure, easy handling.
To achieve these goals, technical scheme of the present invention is: a kind of air supporting biological filter integration apparatus, comprise air flotation pool, described air flotation pool comprises inner core and is located at inner core outside and is highly greater than the urceolus of inner core, described inner core bottom or lower wall offer water-in and are connected with former water water inlet pipe, described inner core top is introduced dissolved air water water inlet pipe and is stretched in inner core, in annulus between described inner core and urceolus, be provided with biologic packing material, with the water body to after air supporting is processed, carry out biofiltration processing, described urceolus bottom or lower wall offer water outlet and are connected with extension tube attached, position higher than inner core top in described urceolus is provided with slag-drip opening, described slag-drip opening is outside scum pipe is connected to urceolus, to discharge scum silica frost.
Further, it is that rising pipe ，Yi road is back flushing water inlet pipe that described extension tube attached is divided two-way ，Yi road, is respectively equipped with valve, to carry out switch selection and Flow-rate adjustment on described rising pipe and back flushing water inlet pipe.
Further, also comprise elevated tank, the import of described elevated tank meets former supply mains, and the radiator drain of described elevated tank connects respectively described former water water inlet pipe and back flushing water inlet pipe, described former water water inlet pipe is provided with valve, to carry out switch selection and Flow-rate adjustment.
Further, also comprise that, for dissolving the dissolving tank of coagulating agent, the drain pipe of described dissolving tank is through former water water inlet pipe described in a certain amount of liquid feeding equipment access.
Further, described inner core lower inside is provided with baffle plate.
Further, described urceolus top be also provided with dissolved air water water inlet pipe and stretch into inner core and urceolus between annulus in, on each dissolved air water water inlet pipe, be equipped with valve.
Further, also comprise by dissolving, backflow water pump, air compressor machine, the air dissolving system that air intake control valve and fluid level controller form, the water outlet access water purifying tank of described air flotation pool, the return line of drawing from described water purifying tank is connected to dissolving through backflow water pump, the inlet pipe of drawing from described air compressor machine is connected to dissolving through air intake control valve, described dissolving is provided with packing, described liquid level sensor is connected with described air intake control valve, with the liquid level change by dissolving, drive into the action of gas control valve, described dissolving water outlet is connected with described dissolved air water water inlet pipe.
The present invention also provides the control method of above-mentioned air supporting biological filter integration apparatus, and when in former water, ammonia nitrogen concentration is not more than 1.0mg/L, controlling reflux ratio is 15 ~ 20%, and hydraulic load is 4 ~ 5m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 6 ~ 8h, and described reflux ratio is the ratio of water flow in recirculation water flow and rising pipe in return line.When in former water, ammonia nitrogen concentration is greater than 2.0mg/L, controlling reflux ratio is 25 ~ 30%, and hydraulic load is 3 ~ 4m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 8 ~ 12h.In former water, algae counts is greater than 10
6individual/during L, controlling reflux ratio is 25 ~ 30%, hydraulic load is 2 ~ 3 m
3/ (m
2h), coagulating agent input amount is 25 ~ 30mg/L, and backwashing period is 24 ~ 36h.
Compared to prior art, the invention has the beneficial effects as follows: by the concentric tube structure design of air supporting biological filter main body, inner circle current air water in the same way, forms the important flotation separation district of air flotation technology, suitablely give the turbidity scope of water treatment and have unique effect for algae, clearance is high.Meanwhile, the suspension slime layer of cylindrical forms the action principle of similar settling pond, has the ability that strengthens biologic packing material scrubbing turbidity removal organic matter removal effect, and scum layer thickness can reach 10 cm.In addition, back flushing directly acts on surface, successful and rapid, and the recoil water yield is economized, and has very strong practicality and wide application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air supporting biological filter integration apparatus of the embodiment of the present invention.
Fig. 2 is the structural representation of the air dissolving system in the embodiment of the present invention.
In figure, 1, elevated tank, 2, dissolving tank, 3, air flotation pool, 4, dissolving, 5, gate valve, 6, magnetic valve, 7, baffle plate in the same way, 8, biologic packing material, 9, stopping valve, 10, slag-drip opening, 11, packing, 12, air compressor machine, 13, inner core, 14, urceolus, 15, former water water inlet pipe, 16, dissolved air water water inlet pipe, 17, rising pipe, 18, back flushing water inlet pipe, 19, radiator drain, 20, drain pipe, 21, air intake control valve, 22, fluid level controller, 23, water hole, 24, reducing valve, 25, return line, 26, backflow water pump, 27, clean water basin, 28, inlet pipe.
Embodiment
Air supporting of the present invention biological filter integration apparatus, as shown in Figure 1, comprise air flotation pool 3, described air flotation pool 3 comprises inner core 13 and is located at inner core 13 outsides and is highly greater than the urceolus 14 of inner core, described inner core 13 bottoms or lower wall offer water-in and are connected with former water water inlet pipe 15, described inner core 13 tops are introduced dissolved air water water inlet pipe 16 and stretch in inner core 13, in annulus between described inner core 13 and urceolus 14, be provided with biologic packing material 8, with the water body to after air supporting is processed, carry out biofiltration processing, described urceolus 14 bottoms or lower wall offer water outlet and are connected with extension tube attached, position higher than inner core 13 tops in described urceolus 14 is provided with slag-drip opening 10, described slag-drip opening 10 is outside scum pipe is connected to urceolus 14, to discharge scum silica frost.Air flotation pool of the present invention adopts concentric tube structure design, and pending former water, from the water inlet of inner core bottom, carries out air supporting processing from bottom to top, and then turnover enters in annulus from top to bottom, carries out biofiltration processing.
It is that rising pipe 17， mono-tunnel is back flushing water inlet pipe 18 that above-mentioned extension tube attached is divided two-way ，Yi road, is respectively equipped with valve, to carry out switch selection and Flow-rate adjustment on described rising pipe 17 and back flushing water inlet pipe 18.In the present embodiment, be equipped with a gate valve 5 and a magnetic valve 6 on described rising pipe 17 and back flushing water inlet pipe 18, magnetic valve is used for normal operation to switch and automatically control with back flushing, and gate valve is used while being manually control and maintenance.
The present invention also comprises elevated tank 1, the import of described elevated tank 1 meets former supply mains, the radiator drain 19 of described elevated tank 1 connects respectively described former water water inlet pipe 15 and back flushing water inlet pipe 18, and described former water water inlet pipe is provided with valve, to carry out switch selection and Flow-rate adjustment.In the present embodiment, be also provided with a gate valve 5 and a magnetic valve 6 on described former water water inlet pipe 15, magnetic valve is used for normal operation to switch and automatically control with back flushing, and gate valve is used while being manually control and maintenance.
During normal operation, open magnetic valve on former water water inlet pipe 15, rising pipe 17, close magnetic valve on back flushing water inlet pipe 18; During back flushing, close magnetic valve on former water water inlet pipe 15, rising pipe 17, open magnetic valve on back flushing water inlet pipe 18.
The present invention also comprises that the drain pipe 20 of described dissolving tank 2 is through former water water inlet pipe 15 described in a certain amount of liquid feeding equipment access for dissolving the dissolving tank 2 of coagulating agent.Coagulating agent, after dissolving tank dissolves, is added in former water water inlet pipe by quantitative liquid feeding equipment.
Above-mentioned inner core 13 lower inside are provided with baffle plate 7, one in the same way, for stationary flow, guarantee the stable of hydraulics, and the 2nd, for the coagulating agent adding provides certain Pre-coagulation effect, guarantee certain coagulating agent agitation speed gradient.
Above-mentioned urceolus 14 tops be also provided with dissolved air water water inlet pipe 16 and stretch into inner core and urceolus between annulus in, on each dissolved air water water inlet pipe, be equipped with stopping valve 9.The stopping valve stretching on the dissolved air water water inlet pipe in inner core is normally open, only needs to open the stopping valve on the dissolved air water water inlet pipe between inner core and urceolus during back flushing.
In the present embodiment, 4 DN15 dissolved air water water inlet pipes are laid at urceolus 14 tops, water inlet pipe mouth is arranged on 200 mm places, biologic packing material surface, only when back flushing, open the stopping valve on pipe, to rinse, stir biologic packing material surface, by the moment of bubble, wash the body refuse that impels filtering layer surface to hold back by rubbing with the hands separated, final flotation enters slag-drip opening to water surface with body refuse, and laying 4 is for rinsing even consideration.
Above-mentioned slag-drip opening 10 is the devices of falling toroidal, during back flushing, with dissolved air water, rinses and stirs filtering layer surface, washes the body refuse that impels filtering layer surface to hold back by rubbing with the hands separated by the moment of bubble, and flotation is discharged in the slag mode of overflowing to water surface to center hydraucone.
As shown in Figure 2, the present invention also comprises by dissolving 4, backflow water pump 26, air compressor machine 12, the air dissolving system that air intake control valve 21 and fluid level controller 22 form, the water outlet access clean water basin 27 of described air flotation pool 3, the return line 25 of drawing from described clean water basin is connected to dissolving 4 through backflow water pump 26, the inlet pipe 28 of drawing from described air compressor machine 12 is connected to dissolving 4 through air intake control valve 21, described dissolving 4 is provided with packing 11, described liquid level sensor 22 is connected with described air intake control valve 21, with the liquid level change by dissolving 4, drive into the action of gas control valve, described dissolving 4 water outlets are connected with described dissolved air water water inlet pipe 16.
Air dissolving system whole-course automation arranges, and its groundwork process is as follows:
1) dissolving water inlet, more than in tank, gaseous tension remains on 0.4 MPa, mixing wastewater with air, intake valve cuts out, and air compressor machine is not worked, the normal water outlet of dissolved air water, this water flow overdraft pump working lift is in 42 m left and right;
2) along with molten gas carries out, the interior gas of tank is molten releasing gradually, and dissolved air water water level rises, and arrives preset water level, and float ball liquid level sensor action, opens intake valve;
3) default air compressor machine work trigger pressure is greater than 0.45 MPa, inlet open, air compressor machine automatic operation, because tank internal pressure raises, the corresponding rising of pressure water pump work lift, discharge declines, and water flow is mainly controlled by external valve keying degree and water body top pressure, substantially constant, water level enters to be less than out like this, and in tank, water level starts to decline;
4) in tank, water level drops to preset water level, float(ing)valve moves again, closes intake valve, and in tank, water level drops to after pressure water pump work lift, water flow, the interior gaseous tension three trim point of tank, again along with continuous molten the releasing of air, progressively rise, return to said process cycle operation.
The control method that the present invention also provides above-mentioned air supporting biological filter integration apparatus water supply to process, specific as follows:
In former water, ammonia nitrogen concentration is not more than the low ammonia nitrogen concentration of 1.0mg/L() time, controlling reflux ratio is 15 ~ 20%, hydraulic load is 4 ~ 5m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 6 ~ 8h, and described reflux ratio is the ratio of water flow in recirculation water flow and rising pipe in return line.
In former water, ammonia nitrogen concentration is greater than 2.0mg/L(high-concentration ammonia-nitrogen) time, can suitably reduce former water flooding quantity, reduce hydraulic load, extend the residence time, controlling reflux ratio is 25 ~ 30%, hydraulic load is 3 ~ 4m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 8 ~ 12h.
In former water, algae counts is greater than 10
6the high algae situation of individual/L() time, controlling reflux ratio is 25 ~ 30%, and hydraulic load is 2 ~ 3 m
3/ (m
2h), coagulating agent input amount is 25 ~ 30mg/L, and backwashing period is 24 ~ 36h.
Be more than preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention, when the function producing does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (10)
1. an air supporting biological filter integration apparatus, it is characterized in that: comprise air flotation pool, described air flotation pool comprises inner core and is located at inner core outside and is highly greater than the urceolus of inner core, described inner core bottom or lower wall offer water-in and are connected with former water water inlet pipe, described inner core top is introduced dissolved air water water inlet pipe and is stretched in inner core, in annulus between described inner core and urceolus, be provided with biologic packing material, with the water body to after air supporting is processed, carry out biofiltration processing, described urceolus bottom or lower wall offer water outlet and are connected with extension tube attached, position higher than inner core top in described urceolus is provided with slag-drip opening, described slag-drip opening is outside scum pipe is connected to urceolus, to discharge scum silica frost.
2. air supporting according to claim 1 biological filter integration apparatus, it is characterized in that: it is that rising pipe ，Yi road is back flushing water inlet pipe that described extension tube attached is divided two-way ，Yi road, on described rising pipe and back flushing water inlet pipe, be respectively equipped with valve, to carry out switch selection and Flow-rate adjustment.
3. air supporting according to claim 2 biological filter integration apparatus, it is characterized in that: also comprise elevated tank, the import of described elevated tank meets former supply mains, the radiator drain of described elevated tank connects respectively described former water water inlet pipe and back flushing water inlet pipe, described former water water inlet pipe is provided with valve, to carry out switch selection and Flow-rate adjustment.
4. air supporting according to claim 1 biological filter integration apparatus, is characterized in that: also comprise that, for dissolving the dissolving tank of coagulating agent, the drain pipe of described dissolving tank is through former water water inlet pipe described in a certain amount of liquid feeding equipment access.
5. air supporting according to claim 1 biological filter integration apparatus, is characterized in that: described inner core lower inside is provided with baffle plate.
6. air supporting according to claim 1 biological filter integration apparatus, is characterized in that: described urceolus top be also provided with dissolved air water water inlet pipe and stretch into inner core and urceolus between annulus in, on each dissolved air water water inlet pipe, be equipped with valve.
7. according to claim 1, 2, 3, 4, air supporting biological filter integration apparatus described in 5 or 6, it is characterized in that: also comprise by dissolving, backflow water pump, air compressor machine, the air dissolving system that air intake control valve and fluid level controller form, the water outlet access water purifying tank of described air flotation pool, the return line of drawing from described water purifying tank is connected to dissolving through backflow water pump, the inlet pipe of drawing from described air compressor machine is connected to dissolving through air intake control valve, described dissolving is provided with packing, described liquid level sensor is connected with described air intake control valve, with the liquid level change by dissolving, drive into the action of gas control valve, described dissolving water outlet is connected with described dissolved air water water inlet pipe.
8. a control method for air supporting as claimed in claim 7 biological filter integration apparatus, is characterized in that: when in former water, ammonia nitrogen concentration is not more than 1.0mg/L, controlling reflux ratio is 15 ~ 20%, and hydraulic load is 4 ~ 5m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 6 ~ 8h, and described reflux ratio is the ratio of water flow in recirculation water flow and rising pipe in return line.
9. a control method for air supporting as claimed in claim 7 biological filter integration apparatus, is characterized in that: when in former water, ammonia nitrogen concentration is greater than 2.0mg/L, controlling reflux ratio is 25 ~ 30%, and hydraulic load is 3 ~ 4m
3/ (m
2h), coagulating agent input amount is 10 ~ 20mg/L, and backwashing period is 8 ~ 12h, and described reflux ratio is the ratio of water flow in recirculation water flow and rising pipe in return line.
10. a control method for air supporting as claimed in claim 7 biological filter integration apparatus, is characterized in that: in former water, algae counts is greater than 10
6individual/during L, controlling reflux ratio is 25 ~ 30%, hydraulic load is 2 ~ 3 m
3/ (m
2h), coagulating agent input amount is 25 ~ 30mg/L, and backwashing period is 24 ~ 36h, and described reflux ratio is the ratio of water flow in recirculation water flow and rising pipe in return line.
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|---|---|---|---|
| CN201310524088.2A CN103539318B (en) | 2013-10-31 | 2013-10-31 | Air flotation biological filter tank integration apparatus and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310524088.2A CN103539318B (en) | 2013-10-31 | 2013-10-31 | Air flotation biological filter tank integration apparatus and control method thereof |
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| CN103539318A true CN103539318A (en) | 2014-01-29 |
| CN103539318B CN103539318B (en) | 2016-03-16 |
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Cited By (3)
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| CN105645669A (en) * | 2014-12-18 | 2016-06-08 | 镇江市规划设计研究院 | River water circulation and water purification combined system and purification method thereof |
| CN108218098A (en) * | 2016-12-13 | 2018-06-29 | 黑龙江吉纳森生物工程股份有限公司 | A kind of biological reinforced processing unit of oily wastewater |
| CN110002569A (en) * | 2019-04-12 | 2019-07-12 | 上海行恒科技有限公司 | Hydrogen-rich water shower bath without electric power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105645669A (en) * | 2014-12-18 | 2016-06-08 | 镇江市规划设计研究院 | River water circulation and water purification combined system and purification method thereof |
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| CN110002569B (en) * | 2019-04-12 | 2024-05-03 | 上海行恒科技有限公司 | Electric power-free hydrogen-rich water shower device |
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|---|---|
| CN103539318B (en) | 2016-03-16 |
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