CN104788005B - A kind of strengthening dewatering of excess sludge and system - Google Patents
A kind of strengthening dewatering of excess sludge and system Download PDFInfo
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- CN104788005B CN104788005B CN201510177028.7A CN201510177028A CN104788005B CN 104788005 B CN104788005 B CN 104788005B CN 201510177028 A CN201510177028 A CN 201510177028A CN 104788005 B CN104788005 B CN 104788005B
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Abstract
A kind of strengthening dewatering of excess sludge, the first step granulates pretreatment：In sludge storage pool, the mud of moisture content 99% is delivered to granulating device by mud screw pump, and polyacrylamide in chemicals dosing plant is transported to granulating device quick mixer structure lower end by dosing pump simultaneously；The time of staying is less than 1s, under granulating device quick mixer structure effect, excess sludge and PAM fast reaction, and generate larger flock；This flock subsequently enters in the low rate mixing mechanism of granulating device, in the presence of low rate mixing mechanism, collides further, polyreaction, forms the graininess flco less, profile is regular；Second step mechanical dehydration：Graininess flco proceeds immediately in concentration tank, filters out part moisture, is then delivered in dehydration equipment by feed worm pump and is dehydrated, and so that graininess flco is fully dehydrated.
Description
Technical field
The invention belongs to environmental project treating sludge field, it is related to a kind of place of the excess sludge that sewage treatment process produces
The dehydration technique of reason technology, particularly excess sludge.
Background technology
Domestic at present, abroad existing main sewage disposal technology be all activated sludge process and derive based on this
Other sewage disposal technologies, and these sewage disposal technologies all can produce excess sludge without exception.And excess sludge is necessary
Process to further apply in agricultural production, production of energy or the application of other resources through abundant.For this aqueous
The excess sludge of rate up to 99%, conventional processing method is to carry out machinery using belt thickener press filter, folded spiral shell machine, centrifuge
Dehydration.
Understand from sludge dehydration treatment technology, mud needs to carry out the conditioning of flocculant before dehydration, and mud and wadding
The mixing of solidifying agent plays vital effect to the mechanical dehydration of follow-up mud.The machinery that traditional mixing is single stirs
Mix, mud mixes not thorough with flocculant in agitator tank, mixed mud granule flco performance unstable, degree of compaction
Also poor, even if being processed by follow-up mechanical dehydration, moisture content also can only be reduced to 75% about by highest, and further
Deep dehydration is intended to realize by methods such as sludge dryings, needs to increase extra energy consumption.Conventional filter press dehydration
Excess sludge is disposably dehydrated to 65% about by system, it usually needs add substantial amounts of quick lime, and processing cost is high, and right
Environment has secondary pollution；So, even if mud and flocculant have been carried out mechanical mixture, but it passes through conventional dehydration methods still no
Method realizes the target that dehydration rate is 65%.
And further deep dehydration is to be realized by conventional sludge drying method, but mummification heat energy itself or
The consumption of electric energy is very big.
Content of the invention
Present invention aim to address the sludge treatment technique of routine is difficult to produce activated sludge sewage disposal process
To moisture content 70% problem below, one of purpose is exactly to provide a kind of strengthening of excess sludge to be dehydrated to excess sludge Direct Dehydration
Method, features simple and practical process, reliably excess sludge is disposed, mechanical dehydration can be passed through, excess sludge is dehydrated to containing
Water rate 65% about, realizes the purpose that mud reuses material as agricultural production or production of energy.Another object of the present invention
It is the strengthening dewatering system that a kind of excess sludge is provided, compact conformation, technological process is brief, and investment is little, easy to maintenance.
The present invention employed technical scheme comprise that for achieving the above object：A kind of strengthening dewatering of excess sludge, including
Granulate pretreatment and mechanical dehydration two parts, concrete technology is：
The first step granulates pretreatment：In sludge storage pool, the mud of moisture content 99% is delivered to granulating by mud screw pump
Device, simultaneously dosing pump by flocculant polyacrylamide flocculant in chemicals dosing plant be transported to granulating device quick mixer structure under
End；Under granulating device quick mixer structure effect, excess sludge and flocculant flocculant fast reaction, generate larger（5-
35mm）Flock；This flock subsequently enters in the low rate mixing mechanism of granulating device, in the presence of low rate mixing mechanism,
Collide further, polyreaction, formed less（2-5mm）, profile rule graininess flco；
Second step mechanical dehydration：Graininess flco proceeds immediately in concentration tank, filters out part moisture, then by entering
Material screw pump is delivered in dehydration equipment and is dehydrated, and so that graininess flco is fully dehydrated.
The described first step granulates pretreatment：The usage amount of wherein flocculant accounts for the 2-4 ‰ of excess sludge weight；Granule
Change the running frequency 25～50Hz of device quick mixer structure；Running frequency 0～the 25Hz of low rate mixing mechanism；
Second step mechanical dehydration：Described dehydration equipment adopts sheet frame diaphragm filter press, and plate and frame type filter-press is in high-pressure hydraulic pump
Under the 1.5-2.0Mpa steady pressure providing, persistently squeeze 40-60 minute, so that graininess flco is fully dehydrated.
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.
A kind of strengthening dewatering system of excess sludge, including granulating device and diaphragm filter press, has been arranged successively by operation
Mud screw pump, mud screw pump entrance point connects sludge storage pool, port of export connection granulating device sludge inlet, and granulating device is fast
Fast rabbling mechanism connects chemicals dosing plant, and granulating device sludge outlet connects concentration tank through feed worm pump, and concentration tank exports through dirt
Mud delivery pump connects filter press, and diaphragm filter press is connected with air compressor machine, jetting machine.
Described granulating device, is related to rabbling mechanism, and rabbling mechanism includes low rate mixing mechanism and quick mixer structure, framework
Upper loading quick mixer structure and low rate mixing mechanism, quick mixer structure connection sludge inlet and flocculant entrance；Stir at a slow speed
Mix mechanism and include interior survey isometric helix and outside Unequal distance cone-type spiral, interior survey isometric helix and outside Unequal distance cone-type spiral are same
The heart is coaxial, is arranged in a conical shell, and low rate mixing mechanism connects motor by shaft, and motor is arranged on
On crossbeam, lengthwise movement guide rail is welded in crossbeam both sides, and crossbeam with contact therewith but is not fixedly connected, and crossbeam is driven by Linear actuator
It is dynamically connected and along guide rail lengthwise movement, Linear actuator is fixed on framework and installation site is the interior of framework and guide rail contact
Side；Quick mixer structure outlet low rate mixing actuator base entrance, low rate mixing mechanism top offers sludge outlet.
The present invention, compared with the similar technique of this area, has significant technical advantage：Using the present invention program it is only necessary to gather
Acrylamide（PAM）, other any flocculant need not be added；And due to granulating the quick stirring action of device, residue can be made
Mud and flocculant are sufficiently mixed, react, and farthest play the property of medicine of polyacrylamide, can save to a certain extent
Machine high polymer coagulant consumption, is greatly reduced processing cost.
Brief description
Fig. 1 is the flow chart of excess sludge strengthening dehydration of the present invention.
Fig. 2 is the site plan that excess sludge strengthening of the present invention is dehydrated various equipment.
Fig. 3 is present invention granulating device structural representation.
In figure：Granulating device A, diaphragm filter press E, feed worm pump C, concentration tank D, filter press E, air compressor machine F are high
Pressure cleaning machine G, pumping plant H；
1：Sludge outlet；2：Conical shell；3：Framework；4：Sludge inlet；5：Flocculant entrance；6：Linear actuator；7：
Crossbeam；8：Outside unequal distant screw；9：Inner side isometric helix；10：Support bar；11：Quick mixer structure stirring paddle；12：At a slow speed
Rabbling mechanism motor；13：Quick mixer structure motor；14：Shaft.
Specific embodiment
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings, but the invention is not limited in tool
Body embodiment.
Embodiment 1
A kind of strengthening dewatering system of excess sludge as shown in Figure 2, including granulating device A and diaphragm filter press E, by work
Sequence has arranged mud screw pump successively, and mud screw pump entrance point connects sludge storage pool, and port of export connection granulating device mud enters
Mouthful, granulating device quick mixer structure connection chemicals dosing plant, granulating device sludge outlet connects concentration tank by feed worm pump C
D, concentration tank outlet through sludge delivery pump connect filter press E, diaphragm filter press E respectively with air compressor machine F, jetting machine G
Connect with pumping plant H.
In system, as shown in figure 3, being related to rabbling mechanism, rabbling mechanism includes low rate mixing mechanism and quickly stirs granulating device
Mix mechanism, framework 3 loads quick mixer structure and low rate mixing mechanism, quick mixer structure connection sludge inlet 4 and flocculation
Agent entrance 5；Low rate mixing mechanism is mainly by being provided with interior survey isometric helix 9 and outside Unequal distance taper in a conical shell 2
Spiral 8 forms, and interior survey isometric helix and outside Unequal distance cone-type spiral concentric co-axial are arranged on shaft 14, outside Unequal distance
Support bar 10 is installed between cone-type spiral and shaft, low rate mixing mechanism connects low rate mixing mechanism by shaft and drives
Motor 12, low rate mixing mechanism driving-motor 12 is arranged on crossbeam 7, and lengthwise movement guide rail, crossbeam and frame are welded in crossbeam both sides
Bridge joint touches but is not fixedly connected, and crossbeam is fixed on framework by Linear actuator 6 drives edge guide rail lengthwise movement, Linear actuator 6
On, fixed position is the inner side of framework and guide rail contact；Quick mixer structure motor 13 drive connection quick mixer structure
Stirring paddle 11, quick mixer structure outlet low rate mixing actuator base entrance, low rate mixing mechanism top offers mud
Outlet 1.
Embodiment 2
The method carrying out the strengthening dehydration of excess sludge using said system, technical process is as shown in figure 1, include granulating
Pretreatment and mechanical dehydration two parts：
The first step granulates pretreatment：The excess sludge that biologic process for treating sewage is produced collects sludge storage pool, dirty
In mud reservoir, the mud of moisture content 99% is delivered to granulating device by mud screw pump, and dosing pump will flocculate in chemicals dosing plant simultaneously
Agent polyacrylamide（PAM）It is transported to granulating device quick mixer structure lower end, the usage amount of flocculant accounts for excess sludge weight
3 ‰；The time of staying is less than 1s, and under granulating device quick mixer structure effect, excess sludge is quickly anti-with flocculant PAM
Should, generate larger flock；This flock subsequently enters in the low rate mixing mechanism of granulating device, in low rate mixing mechanism
Under effect, collide further, polyreaction, form less, graininess flco that profile is regular；Wherein granulating device is fast
Fast rabbling mechanism drives parameter：Maximum revolution：1425 rpm；Run revolution：1200 rpm；Low rate mixing mechanism drives parameter：
Maximum revolution：425 rpm；Run revolution：220 rpm.
Second step mechanical dehydration：Graininess flco proceeds immediately in concentration tank, filters out part moisture, then by entering
Material screw pump is delivered in dehydration equipment and is dehydrated, and dehydration equipment adopts sheet frame diaphragm filter press, and plate and frame type filter-press is in height
Under the 2.0Mpa steady pressure that water pump provides, persistently squeeze 1 hour, so that graininess flco is fully dehydrated makes graininess flco fill
Divide dehydration, the mud cake solid content ＞ 35% of formation.
Claims (5)
1. a kind of strengthening dewatering system of excess sludge, is characterized in that：Including granulating device and sheet frame diaphragm filter press, by operation
It is disposed with feed worm pump, feed worm pump inlet end connects sludge storage pool, port of export connection granulates device sludge inlet,
Granulating device quick mixer structure connection chemicals dosing plant, granulating device sludge outlet connects concentration tank through feed worm pump, concentrates
Tank outlet connects sheet frame diaphragm filter press through sludge delivery pump, and sheet frame diaphragm filter press is connected with air compressor machine, jetting machine, institute
State granulating device, be related to rabbling mechanism, rabbling mechanism includes low rate mixing mechanism and quick mixer structure, framework loads quick
Rabbling mechanism and low rate mixing mechanism, quick mixer structure connection sludge inlet and flocculant entrance；Low rate mixing mechanism includes
Inner side isometric helix and outside Unequal distance cone-type spiral, inner side isometric helix and outside Unequal distance cone-type spiral concentric co-axial, peace
It is contained in a conical shell, low rate mixing mechanism connects motor by shaft, motor is arranged on crossbeam, horizontal
Lengthwise movement guide rail is welded in beam both sides, and crossbeam with contact therewith but is not fixedly connected, crossbeam by Linear actuator drive connection and
Along guide rail lengthwise movement, Linear actuator is fixed on framework and installation site is the inner side of framework and guide rail contact；Quickly stir
Mix mechanism's outlet low rate mixing actuator base entrance, low rate mixing mechanism top offers sludge outlet.
2. adopt right described in 1, to strengthen a kind of strengthening dewatering of excess sludge of dewatering system on request, it is characterized in that：Bag
Include granulating pretreatment and mechanical dehydration two parts, concrete technology is：
The first step granulates pretreatment：In sludge storage pool, the mud of moisture content 99% is delivered to granulating device by feed worm pump, with
When dosing pump by the polyacrylamide flocculant in chemicals dosing plant be transported to granulating device quick mixer structure lower end；In granulating
Under the effect of device quick mixer structure, excess sludge and flocculant fast reaction, generate 5-35mm flock；This flock is with laggard
Enter to granulate in the low rate mixing mechanism of device, in the presence of low rate mixing mechanism, collide further, polyreaction, shape
Become 2-5mm, the graininess flco of profile rule；
Second step mechanical dehydration：Graininess flco proceeds immediately in concentration tank, filters out part moisture, then by charging spiral shell
Bar pump is delivered in dehydration equipment and is dehydrated, and so that graininess flco is fully dehydrated.
3. a kind of strengthening dewatering of excess sludge according to claim 2, is characterized in that：Described first step granulating
Pretreatment：The usage amount of wherein flocculant accounts for the 2-4 ‰ of excess sludge weight；The operation frequency of granulating device quick mixer structure
Rate 25～50Hz；Running frequency 0～the 25Hz of low rate mixing mechanism；
Second step mechanical dehydration：Described dehydration equipment adopts sheet frame diaphragm filter press, and plate and frame diaphragm filter press is in high-pressure hydraulic pump
Under the 1.5-2.0Mpa steady pressure providing, persistently squeeze 40-60 minute, so that graininess flco is fully dehydrated.
4. a kind of strengthening dewatering of excess sludge according to claim 2, is characterized in that：The drive of described quick stirring
Dynamic parameter：Maximum revolution：1425 rpm；Run revolution：900-1400 rpm.
5. a kind of strengthening dewatering of excess sludge according to claim 2, is characterized in that：The drive of described low rate mixing
Dynamic parameter：Maximum revolution：425 rpm；Run revolution：200-330 rpm.
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| CN201510177028.7A CN104788005B (en) | 2015-04-15 | 2015-04-15 | A kind of strengthening dewatering of excess sludge and system |
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| CN105585238A (en) * | 2016-03-01 | 2016-05-18 | 长沙锦佳环保科技有限公司 | Sludge treatment method |
| CN105601084A (en) * | 2016-03-01 | 2016-05-25 | 长沙锦佳环保科技有限公司 | Flocculating agent, flocculating agent preparing method and silt stirring method |
| CN108947200A (en) * | 2018-07-23 | 2018-12-07 | 安徽省通源环境节能股份有限公司 | A kind of modified deep dehydration of sludge conditioning and desiccation charing process technique |
| CN109626795A (en) * | 2019-01-18 | 2019-04-16 | 宝钢湛江钢铁有限公司 | A kind of mud dewatering method containing powdered carbon of sintering device flue gas purification Wastewater from Acid Preparation |
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| JPH0471700A (en) * | 1990-07-13 | 1992-03-06 | Mitsubishi Kakoki Kaisha Ltd | Sludge treating device |
| CN101544461B (en) * | 2009-05-05 | 2011-09-21 | 广东绿由环保科技股份有限公司 | Sludge stirring system |
| CN102674602A (en) * | 2012-05-31 | 2012-09-19 | 复旦大学 | Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device |
| CN204737871U (en) * | 2015-04-15 | 2015-11-04 | 大连迈克环境科技工程有限公司 | Excess sludge's intensive dewatering system |
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