CN104788006B - A kind of method of reinforcement sludge and medicament mixed effect and special equipment - Google Patents
A kind of method of reinforcement sludge and medicament mixed effect and special equipment Download PDFInfo
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- CN104788006B CN104788006B CN201510177111.4A CN201510177111A CN104788006B CN 104788006 B CN104788006 B CN 104788006B CN 201510177111 A CN201510177111 A CN 201510177111A CN 104788006 B CN104788006 B CN 104788006B
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Abstract
A kind of reinforcement sludge and the method for medicament mixed effect, after mud first passes through quick stirring, then carry out low rate mixing, quick stirring：Activated sludge and flocculant are rapidly injected quick mixer structure, and the time of staying is less than 1s, and average velocity gradient and mixing intensity are all controlled, complete mixed function, form the low-shearing force stability of high volume flco；Low rate mixing：Activated sludge through quick stirring enters low rate mixing mechanism, through taper low rate mixing system, forms granule sludge.The present invention is directed to city domestic sewage and processes the zoogloea being formed containing hydrophilic negative electricity biomone in generation excess sludge; zoogloea makes mud be difficult the characteristic being dehydrated; complete the coagulation of activated sludge and flocculant by quick mixer structure; again the preferable granule sludge of hydrophobicity is configured to by conical agitator at a slow speed, realizes granular sludge pretreatment.Granular sludge pretreatment enhances the dehydrating effect of subsequent mechanical dewatering system, improves dewatering efficiency, reduces the usage amount of flocculant.
Description
Technical field
The invention belongs to environmental project treating sludge field, it is related to a kind of city domestic sewage and processes generation excess sludge
Preconditioning technique and equipment.
Background technology
At present, the municipal sewage treatment more than 90% adopts activated sludge process in the world, but result can produce and contain in a large number
The excess sludge of water rate up to more than 99%, volume accounts for processing the 0.3% ~ 0.5% of the water yield, according to advanced treating sludge quantity meeting
Increase by 0.5 to 1.0 times.Various countries are built to erect the scheme recycling residual active sludge, common method be landfill or
Impose in soil as nutrient, but these methods can cause the secondary pollution of environment.So new legal provisions are forbidden to give birth to
The abandoning and landfill of thing solid, mud has to pass through minimizing, stabilisation, harmless treatment, encourages to realize resource.
Sludge dewatering is a kind of the most economic method in sludge reduction, is the important ring of one of sludge treatment technique
Section, its objective is to remove the moisture content of pore water and capillary water, reduction mud in mud, the such as mud of moisture content 98%, reduces
2% water, sludge volume will reduce 50%, and sludge dewatering is to reduce sludge volume, is readily transported and processes, or minimizing space,
The necessary means of the energy required for reducing drying sludge and burning, are that the final disposal of mud creates conditions.
The zoogloea being formed containing hydrophilic negative electricity biomone in mud, zoogloea makes mud be difficult to be dehydrated, through machine
Tool processes moisture content still more than 80%.In order to improve the utilization ratio of excess sludge, sludge pre-treatment techniques are increasingly subject to weight
Depending on the more sludge pre-treatment techniques of research mainly include Mechanical Method, excusing from death ripple method, Grape berry method, microwave method, freezing at present
Method, radiation method, Ozone, chlorine method and acid-base method etc., but all there is respective shortcoming in these technology, such as：Equipment and materials is required
Higher, operation and maintenance cost height etc..In addition, part preconditioning technique can increase secondary pollution and subsequent technique intractability.
Understand in sludge dehydration treatment technology, mud needs to carry out the conditioning of medicament before dehydration, and mud and medicament
Mixing plays vital effect to the mechanical dehydration of follow-up mud.Traditional mixing is single mechanical agitation, mud
Mix not thorough in agitator tank with medicament, mixed mud granule flco performance unstable, degree of compaction is also poor, even if
Processed by follow-up mechanical dehydration, moisture content also can only be reduced to 75% about by highest, and further deep dehydration is
To be realized by methods such as sludge dryings, to need to increase extra energy consumption.So, even if mud and medicament have been carried out machinery
Mixing, but it still cannot realize, by conventional dehydration methods, the target that dehydration rate is 65%.
Content of the invention
The purpose of the present invention is for the zoogloea being formed containing hydrophilic negative electricity biomone in mud, and zoogloea makes
Mud is difficult the characteristic being dehydrated, a kind of method providing reinforcement sludge and medicament mixed effect, and method is simple, it is to avoid a large amount of waddings
Solidifying agent or the use of conditioner, directly through mechanical thickening, dehydration, stable（According to user's request）Solid content can be formed reach
More than 40% shale.The second object of the present invention is to provide a kind of reinforcement sludge to set with the special of the method for medicament mixed effect
Standby, by controlled step by step variable speed collision, make activated sludge homogenizing become the less mud granule of irreducible water ratio, be mud no
The final disposal of evilization and resource provides reliable guarantee.
Adopt the technical scheme that for achieving the above object：A kind of reinforcement sludge and the method for medicament mixed effect, mud
After first passing through quick stirring, then carry out low rate mixing：
Quick stirring：Activated sludge and flocculant are rapidly injected quick mixer structure, average velocity gradient and mixing intensity
All controlled, the FREQUENCY CONTROL of converter, in the range of 25～50 hertz, completes mixed function, forms the low sheraing of high volume flco
Power stability；
Low rate mixing：Activated sludge through quick stirring enters low rate mixing mechanism, is stirred at a slow speed by frequency control
Mix, the FREQUENCY CONTROL of converter, in the range of 0～25 hertz, realizes the solid closely knit of mud granule flco and stable, formation
Grain mud.
The driving parameter of described quick stirring：Maximum revolution：1425 rpm；Run revolution：900-1400 rpm.
The driving parameter of described low rate mixing：Maximum revolution：425 rpm；Run revolution：200-330 rpm.
Described quick stirring：Flocculant adopts polyacrylamide, and flocculant usage is the 2- of dry mud weight in a mud
4‰.The quick stirring time of staying is less than 1s.
A kind of reinforcement sludge and the special equipment of the method for medicament mixed effect, are related to rabbling mechanism, rabbling mechanism includes
Low rate mixing mechanism and quick mixer structure, framework loads quick mixer structure and low rate mixing mechanism, quick mixer structure
Connection sludge inlet and flocculant entrance；Low rate mixing mechanism includes interior survey isometric helix and outside Unequal distance cone-type spiral, interior
Survey isometric helix and outside Unequal distance cone-type spiral concentric co-axial, be arranged in a conical shell, low rate mixing mechanism passes through
Shaft connects motor, and motor is arranged on crossbeam, and lengthwise movement guide rail is welded in crossbeam both sides, and crossbeam is connect with framework
Touch but be not fixedly connected, crossbeam is fixed on framework, linearly by Linear actuator drives edge guide rail lengthwise movement, Linear actuator
The installation site of driver is the inner side of framework and guide rail contact；Quick mixer structure outlet low rate mixing actuator base enters
Mouthful, low rate mixing mechanism top offers sludge outlet.
The present invention, according to sludge character difference, is stablized, is efficiently granulated technology using a kind of, technique is unique, simply easily
In operation, effectively mud is filled by the quick frequency modulation optimal design-aside with low rate mixing in a device with conditioning medicament
Divide and efficiently mix, mixed granule sludge is easier to make for follow-up mechanical dehydration and processes.Wherein quick stirring is the
After primary sludge is mixed with medicament, quickly stirred by variable frequency adjustment agitating device in granulating device entrance point, here, can
Carry out the frequency modulation setting of rotating speed, realize the effect that mud is quickly mixed with medicament；Afterwards, then carry out low rate mixing, also may be used herein
Carry out the frequency modulation setting of rotating speed, make the flco that mud is mixed with medicament better.Follow-up sludge dehydration device adopts filter pressing
Machine or the advanced dehydration device of other reliable technological levels, enhance system dehydrating effect, improve dewatering efficiency, reduce flocculation
The usage amount of agent.
The present invention, compared with this area granular sludge equipment, has the characteristics that prominent：The present invention is granulating device device
It is divided into two parts with mud and combining of sludge conditioning medicament, Part I carries out mud and nurses one's health quickly mixing of medicament
Close；Part II is carried out mud and is mixed at a slow speed with nurse one's health medicament.By the frequency modulation setting to agitating device, realize agitator
Optimize and run it is ensured that mud fully and is efficiently mixed with nurse one's health medicament., wherein conical agitator structure major function is at a slow speed
Form granule sludge, it is a kind of taper agitating device, be made up of interior survey isometric helix and outside Unequal distance cone-type spiral, two
Spiral concentric is coaxial, and different radii leads to centrifugal force different along axle distribution with fluidised form, and mud moves to cone top from bottom, by
Gradually decrease in radius, centrifugal force and shearing force also gradually decrease, the high intensity mixing of large radius accelerates flocculence network structure
Destruction, when stirring intensity reduces along axle, sludge flocculation structure through discrete, collision and is recombinated, and forms stable granule.
Use can be coupled from different dewatering types to test mud extraction after grainy treatment of the present invention, corresponding dewatering type can be made
Dewatering lifting 25%, the consumption of flocculant reduces 30%.
Brief description
Accompanying drawing 1 is present invention process flow chart.
Fig. 2 is special equipment structural representation of the present invention.
In figure：1：Sludge outlet；2：Conical shell；3：Framework；4：Sludge inlet；5：Flocculant entrance；6：Linear Driving
Device；7：Crossbeam；8：Outside unequal distant screw；9：Inner side isometric helix；10：Support bar；11：Quick mixer structure stirring paddle；12：
Low rate mixing mechanism driving-motor；13：Quick mixer structure motor；14：Shaft.
Specific embodiment
Below in conjunction with accompanying drawing be embodied as example the granular sludge equipment of the present invention is described in further detail：
The special equipment of the method for a kind of reinforcement sludge as shown in Figure 2 and medicament mixed effect, is a kind of mud granule
Change equipment, is related to rabbling mechanism, and rabbling mechanism includes low rate mixing mechanism and quick mixer structure, framework 3 loads and quickly stirs
Mix mechanism and low rate mixing mechanism, quick mixer structure connection sludge inlet 4 and flocculant entrance 5；Low rate mixing mechanism is main
By be provided with a conical shell 2 interior survey isometric helix 9 and outside Unequal distance cone-type spiral 8 form, interior survey isometric helix and
Outside Unequal distance cone-type spiral concentric co-axial is arranged on shaft 14, installs between outside Unequal distance cone-type spiral and shaft
There is support bar 10, low rate mixing mechanism connects low rate mixing mechanism driving-motor 12 by shaft, low rate mixing mechanism drives
Motor 12 is arranged on crossbeam 7, and lengthwise movement guide rail is welded in crossbeam both sides, and crossbeam with contact therewith but is not fixedly connected, crossbeam
By Linear actuator 6 drives edge guide rail lengthwise movement, Linear actuator 6 is fixed on framework, and fixed position is framework and guide rail
The inner side of contact；Quick mixer structure motor 13 drive connection quick mixer structure stirring paddle 11, quick mixer structure goes out
Mouth connection low rate mixing actuator base entrance, low rate mixing mechanism top offers sludge outlet 1.
The motor of described low rate mixing mechanism is connected by flange with crossbeam, motor drive taper shaft and
Done with crossbeam by Linear actuator and move vertically by a small margin.
When being processed using above-mentioned granular sludge equipment, technological process is as shown in figure 1, mud first passes through quick stirring
Afterwards, then carry out low rate mixing：
Quick stirring：The excess sludge of moisture content 99.2% passes through sludge inlet 4, and flocculant polyacrylamide consumption is dirt
In mud, the 3 ‰ of dry mud weight, are added by flocculant entrance 5, by quick mixer structure motor 13 by quick mixer
Mud and flocculant are quickly mixed by structure stirring slurry 11, and the time of staying is less than 1s, and average velocity gradient and mixing intensity are all controlled,
Complete mixed function, form the low-shearing force stability of high volume flco；The motor ginseng of wherein said quick mixer structure
Number：Maximum revolution：1425 rpm；Run revolution：1200 rpm.
Low rate mixing：Mud after quick stirring is entered by entrance low rate mixing actuator base after the outlet of quick mixer structure
Mouthful, now excess sludge and flocculant have been mixed to form flocculence network structure.This kind of structure mud is via low rate mixing machine
The mixing of isometric helix 9 and outside unequal distant screw 8 inside structure, centrifugation and fluidised form collision form granular sledge, now
Granulation mud has been provided with stable, no filiform cell hydrophobic structure.Granule sludge is discharged from sludge outlet 1, through sedimentation is
Achievable moisture percentage in sewage sludge is down to outlet less than 90% from entrance 99.2%.And the characteristic of granule sludge itself makes it couple other
Dewatering type can significantly lift dewatering, reduces flocculant usage amount.The motor of wherein said low rate mixing mechanism
Parameter：Maximum revolution：425 rpm；Run revolution：220 rpm.
Claims (6)
1. a kind of reinforcement sludge and the method for medicament mixed effect, is characterized in that：Using special equipment, mud is first passed through quickly
After stirring, then carry out low rate mixing,
Quick stirring：Activated sludge and flocculant are rapidly injected quick mixer structure, average velocity gradient and mixing intensity
Control, the FREQUENCY CONTROL of converter, in the range of 25～50 hertz, completes mixed function, and the low-shearing force forming high volume flco is steady
Qualitative；
Low rate mixing：Activated sludge through quick stirring enters low rate mixing mechanism, carries out low rate mixing by frequency control, becomes
The FREQUENCY CONTROL of frequency device, in the range of 0～25 hertz, realizes the solid closely knit of mud granule flco and stable, formation granule dirt
Mud；
Wherein special equipment is related to rabbling mechanism, and rabbling mechanism includes low rate mixing mechanism and quick mixer structure, and framework fills
Carry quick mixer structure and low rate mixing mechanism, quick mixer structure connection sludge inlet and flocculant entrance；Low rate mixing machine
Structure includes inner side isometric helix and outside Unequal distance cone-type spiral, and inner side isometric helix and outside Unequal distance cone-type spiral are same with one heart
Axle, is arranged in a conical shell, and low rate mixing mechanism connects motor by shaft, and motor is arranged on crossbeam
On, lengthwise movement guide rail is welded in crossbeam both sides, and crossbeam with contact therewith but is not fixedly connected, and crossbeam is by Linear actuator drives edge
Guide rail lengthwise movement, Linear actuator is fixed on framework, and it is interior with guide rail contact that the installation site of Linear actuator is framework
Side；Quick mixer structure outlet low rate mixing actuator base entrance, low rate mixing mechanism top offers sludge outlet.
2. a kind of reinforcement sludge according to claim 1 and the method for medicament mixed effect, is characterized in that：Described quickly stir
The driving parameter mixed：Maximum revolution：1425 rpm；Run revolution：900-1400 rpm.
3. a kind of reinforcement sludge according to claim 1 and the method for medicament mixed effect, is characterized in that：Described stir at a slow speed
The driving parameter mixed：Maximum revolution：425 rpm；Run revolution：200-330 rpm.
4. a kind of reinforcement sludge according to claim 1 and the method for medicament mixed effect, is characterized in that：Described quickly stir
Mix：Flocculant adopts polyacrylamide, and flocculant usage is the 2-4 ‰ of dry mud weight in mud.
5. a kind of reinforcement sludge according to claim 1 and the method for medicament mixed effect, is characterized in that：Described quickly stir
Mix the time of staying less than 1s.
6. any reinforcement sludge of claim 1-5 and the special equipment of the method for medicament mixed effect, are related to blender
Structure, is characterized in that：Rabbling mechanism includes low rate mixing mechanism and quick mixer structure, and framework loads quick mixer structure and slow
Fast rabbling mechanism, quick mixer structure connection sludge inlet and flocculant entrance；Low rate mixing mechanism includes inner side isometric helix
With outside Unequal distance cone-type spiral, inner side isometric helix and outside Unequal distance cone-type spiral concentric co-axial, it is arranged on a taper
Inside the shell, low rate mixing mechanism connects motor by shaft, and motor is arranged on crossbeam, and the welding of crossbeam both sides is vertical
To motion guide rail, crossbeam with contact therewith but is not fixedly connected, crossbeam by Linear actuator drives edge guide rail lengthwise movement, linearly
Driver is fixed on framework, and the installation site of Linear actuator is the inner side of framework and guide rail contact；Quick mixer structure goes out
Mouth connection low rate mixing actuator base entrance, low rate mixing mechanism top offers sludge outlet.
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| CN201510177111.4A CN104788006B (en) | 2015-04-15 | 2015-04-15 | A kind of method of reinforcement sludge and medicament mixed effect and special equipment |
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| CN201510177111.4A CN104788006B (en) | 2015-04-15 | 2015-04-15 | A kind of method of reinforcement sludge and medicament mixed effect and special equipment |
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| CN104788006B true CN104788006B (en) | 2017-03-01 |
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| JPS6094200A (en) * | 1983-10-28 | 1985-05-27 | Hitachi Plant Eng & Constr Co Ltd | Treatment before dehydration of organic sludge |
| EP1121974B1 (en) * | 2000-01-31 | 2013-06-12 | Tetra Laval Holdings & Finance S.A. | Mixing apparatus and use |
| CN101328004B (en) * | 2008-06-23 | 2011-11-30 | 浙江科力尔环保设备有限公司 | Flocculating concentration apparatus in sludge treatment |
| CN102674602A (en) * | 2012-05-31 | 2012-09-19 | 复旦大学 | Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device |
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