CN103241920B - Chemical conditioning multistage mixing technology of sludge - Google Patents
Chemical conditioning multistage mixing technology of sludge Download PDFInfo
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- CN103241920B CN103241920B CN201210022028.6A CN201210022028A CN103241920B CN 103241920 B CN103241920 B CN 103241920B CN 201210022028 A CN201210022028 A CN 201210022028A CN 103241920 B CN103241920 B CN 103241920B
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Abstract
The invention relates to a sludge press filtration dehydration processing technology, and discloses a chemical conditioning multistage mixing technology of sludge. The technology adopts a four-stage mixing method, changes an original two-stage large-volume stirring mixing form, and allows a pipeline mixer and a powdery conditioning emulsion preparation and adding apparatus to be arranged in the sludge and conditioning emulsion conveying process, and the four-stage mixing makes the effect obvious, reduces manpower, power, conditioning emulsion and equipment consumption and reduces the operation cost; and the application of a PLC programmable control system realizes a high automation degree and a convenient operation.
Description
Technical field
The present invention relates to sludge press filtration processed technology, relate in particular to the multistage hybrid technique of a kind of Sludge Chemical Conditioning.
Background technology
At present domesticly more generally adopt van-type plate and frame diaphragm filter press to carry out sludge dewatering treatment technology to replace the traditional sludge solid-liquid separation techniques such as original centrifugal dewatering of sludge, vacuum suction filter dehydration, belt filter press dehydration, make moisture percentage in sewage sludge reach the emission request of national regulation.
Solids in mud is mainly comprised of the electronegative colloidal solid of wetting ability, and because particulate matter is tiny and inhomogeneous, the bonding force of sludge water and sewage sludge solid particle is very strong, larger than resistance, so dewatering is poor.In order to improve the performance of sludge dewatering, improve the effect of mechanical dehydration, need to change by conditioning the physico-chemical property of mud, reduce the avidity of colloidal solid and water, for solid-liquid separation creates conditions.Sludge conditioning mainly comprises chemical conditioning, the temperature difference is modified and microorganism flocculation is modified.
Chemical conditioning is to apply at present maximum mud hardening and tempering methods.Its ultimate principle is the amendment that can play electrical neutralization or adsorption bridging effect by adding in mud, as coagulating agent, flocculation agent, coagulant aids etc., destroy the stability of mud colloidal solid, between the small-particle that makes to disperse, mutually assemble and be split into macrobead, thereby improve the dehydration property of mud.
The amendment adding in chemical conditioning process can be divided into pressed powder, liquid form, amount is by a certain percentage by directly adding or make emulsion dosing method, with be transported to quantitative sludge agitation in the sludge conditioning pond that whipping appts is installed and mix and reach change sludge structure, strengthen floc strength, destroy colloidal stability, thereby improve the object of dehydration property.
In current domestic sludge press filtration dewatering process, generally adopt: powdery amendment directly adds with powdery amendment preparation emulsion and adds two kinds of addition methods.
Owing to directly adding powdery amendment, easily cause dust from flying to pollute production environment, increase sludge conditioning pond whipping appts structure and power, easily cause incomplete mixing to affect conditioning effect.It is by the emulsion addition method that is mixed and made into certain proportion concentration with liquid by powdery amendment that emulsion adds, existing domestic and international mud generally adopts tap water or middle water and Powdered amendment to be mixed with emulsion by pump delivery, to carry out addition method again, device structure is complicated and huge, and investment, place, working cost increase.The extra water yield that increases causes follow-up filter-press dehydration technique operation hours to extend, and solid-liquid separation load strengthens.In preparation emulsion process, powdery amendment reacts the modifying function forfeiture to enzyme in mud of produced heat with the former water chemistry of mud.It is to improve sludge conditioning effect that amendment mixes sufficiently uniformly with mud, reduces the loss of amendment, accelerates follow-up mechanical dehydration speed, reduces the determinative of working cost.
Summary of the invention
The present invention is directed to directly adding with emulsion of generally adopting in current Sludge Chemical Conditioning technological process and add two kinds of shortcomings that amendment dosing method effect is bad, and provide a kind of brand-new Sludge Chemical Conditioning multistage hybrid technique.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
The multistage hybrid technique of Sludge Chemical Conditioning, comprises the following steps:
The first step: the mud in sludge sump is entered to line mixer with constant rate by entering mud pipeline with entering dredge pump, open amendment solution throwing device, volume pump simultaneously, amendment solution is transported in line mixer and synchronizes with mud and carry out one-level mixing, mixed mud, in line mixer outlet conduit flow into sludge conditioning pond, carries out secondary mixing by the conditioning agitator of installing in sludge conditioning pond;
Second step: after secondary mixing finishes, open powdery amendment feed bin, open powdery amendment emulsion preparation and throwing device, intake pump extracts in sludge conditioning pond the mixed mud of secondary with constant rate, open powdery amendment feed bin bottom discharge port, inlet amount is controlled by the weighing device being arranged on powdery amendment feed bin, the discharge port that powder enters the powdery amendment conveyer feed inlet of installing bottom and is transported to specified location is added in the opening for feed of powdery amendment emulsion preparation and throwing device, the mixed mud of secondary and powder are realized three grades and are mixed with stirring in throwing device at powdery amendment emulsion preparation, emulsion discharge pipe by powdery amendment emulsion preparation and throwing device overflows in sludge conditioning pond voluntarily afterwards, by the conditioning agitator of having opened in sludge conditioning pond, carry out level Four mixing, so far powdery amendment adds end, the conditioning agitator some time in sludge conditioning pond is uniformly mixed again, the multistage hybrid technique of Sludge Chemical Conditioning completes.
Powdery amendment emulsion preparation and throwing device in described step 2 comprise stirred pot, in stirred pot, be provided with the newborn agitator of system, make newborn agitator and be provided with the newborn agitator motor of system and speed reduction unit, on stirred pot sidewall, be connected with inlet channel and emulsion discharge pipe, the upper surface of stirred pot is also connected with dedusting outlet conduit, inlet channel is connected with stirred pot sidewall by intake pump, amendment emulsion preparation and opening for feed place, throwing device upper end are connected with powdery amendment transfer roller, and the other end of powdery amendment transfer roller is connected with powdery amendment feed bin.Inlet channel and emulsion discharge pipe are positioned at stirred pot sidewall mid-way, and the mud in assurance stirred pot, in certain liquid level, makes powdery amendment mix fully with mud, thereby strengthen sludge conditioning effect.Device top is provided with fly-ash separator, for collecting powder, adds the dust that process is flown upward.The rectangle liquid level forming by dedusting outlet conduit and rectangle discharge port with dirt air-flow is spaced apart, and the amendment emulsion current that vertically liquidate, reach dust removing effects.
Sludge conditioning pond in described step 1 and step 2 is provided with liquidometer.For detecting in real time the liquid level of mud in sludge conditioning pond.
Described powdery amendment feed bin, powdery amendment transfer roller, nurse one's health agitator, make newborn agitator, intake pump, enter dredge pump and volume pump, liquidometer all by PLC central controller controls.Using PLC central controller, control able to programme, level of automation is high, and it is more convenient to operate.
Sludge conditioning pond in the described the first step is two or more.
Amendment solution throwing device in described step 1 is connected with amendment solution-preparation device, and amendment solution-preparation device is prepared into amendment solution by solid, powdery amendment and is delivered in amendment solution throwing device stand-by.
Realize the device of the multistage hybrid technique of the technology of the present invention Sludge Chemical Conditioning, comprise sludge conditioning pond, in sludge conditioning pond, be provided with conditioning agitator, sludge conditioning pond is provided with conditioning agitator motor and speed reduction unit, mud enters in sludge conditioning pond in sludge sump by entering mud pipeline, the top in described sludge conditioning pond is connected with powdery amendment emulsion preparation and throwing device, and described sludge conditioning pond is also connected with line mixer, amendment solution throwing device.
The other end of amendment solution throwing device is connected with amendment solution-preparation device.
Upper end, sludge conditioning pond is connected with line mixer, and the mud in sludge sump is by entering dredge pump and entering after mud pipeline is connected to enter in line mixer; Amendment solution in amendment solution throwing device enters in line mixer after by volume pump.
Powdery amendment feed bin, powdery amendment transfer roller, conditioning agitator motor and speed reduction unit, system breast agitator motor and speed reduction unit, liquidometer, intake pump, enter dredge pump, liquidometer and volume pump and be all electrically connected to PLC central controller.
The beneficial effect of the technology of the present invention is: Working environment, without directly adding the dust pollution easily causing, does not cause harmful effect to human body and equipment; The preparation of mud and powdery amendment be the newborn process of system be also conditioning mixing process, do not make in newborn process and need a large amount of tap water or middle water consumption, follow-up filter-pressing dehydration equipment be there is no additionally to increase to load and the consumption of mud handling capacity; Powdery amendment powder preparation produce in emulsion process heat to mud in the modifying function of enzyme be utilized effectively; Change the preparation of existing emulsion and add processing method, appliance arrangement is simple in structure, easy and simple to handle, safeguards laborsavingly, and the area that saves space, reduces investment and working cost; Sludge conditioning pond is entered mud amount and is synchronizeed in proportion and carry out with amendment solution dosage, shortens the process time; Change the large volume of original secondary and be uniformly mixed form, in mud and amendment course of conveying, increase line mixer, amendment emulsion preparation and the throwing device of the little volume mixing device of two covers, implementation level Four is mixed, effect is more obvious, reduce manpower, power, amendment, devices consume, reduce working cost; Using PLC programmable control system, level of automation is high, and it is more convenient to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of process unit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
Embodiment, as shown in Figure 1, the multistage hybrid technique of Sludge Chemical Conditioning, comprises the following steps:
The first step: the mud in sludge sump 9 is entered to line mixer 6 with constant rate by entering mud pipeline 7 with entering dredge pump 8, open amendment solution throwing device 11, volume pump 10 simultaneously, amendment solution is transported in line mixer 6 and synchronizes with mud and carry out one-level mixing, mixed mud flow in sludge conditioning pond 4 through line mixer 6 outlet conduits, open the some time, the conditioning agitator 41 by the 4 interior installations of sludge conditioning pond carries out secondary mixing;
Second step: after secondary mixing finishes, open powdery amendment feed bin 1, open powdery amendment emulsion preparation and throwing device 3, intake pump 33 extract to be adjusted in sludge conditioning pond 4 the mixed mud of secondary with constant rate, open powdery amendment feed bin 1 bottom discharge port, inlet amount is controlled by the weighing device being arranged on powdery amendment feed bin 1, the discharge port that powder enters powdery amendment transfer roller 2 opening for feeds of installing bottom and is transported to specified location is added in the opening for feed of powdery amendment emulsion preparation and throwing device 3, the mixed mud of secondary and powder are realized three grades and are mixed with stirring in throwing device 3 at powdery amendment emulsion preparation, emulsion discharge pipe 35 by powdery amendment emulsion preparation and throwing device 3 overflows in sludge conditioning pond 4 voluntarily afterwards, by the conditioning agitator 41 of having opened in sludge conditioning pond 4, carry out level Four mixing, so far powdery amendment adds end, 41 some times of conditioning agitator in sludge conditioning pond 4 is uniformly mixed again, the multistage hybrid technique of Sludge Chemical Conditioning completes.
Powdery amendment emulsion preparation and throwing device 3 in described step 2 comprise stirred pot 30, in stirred pot 30, be provided with the newborn agitator 32 of system, make newborn agitator 32 and be provided with the newborn agitator motor of system and speed reduction unit 31, on stirred pot 30 sidewalls, mid-way is connected with inlet channel 34 and emulsion discharge pipe 35, the upper surface of stirred pot 30 is also connected with dedusting outlet conduit 36, inlet channel 34 is connected with stirred pot 30 sidewalls by intake pump 33, amendment emulsion preparation and throwing device 3 opening for feed places, upper end are connected with powdery amendment transfer roller 2, the other end of powdery amendment transfer roller 2 is connected with powdery amendment feed bin 1.
Described one and step 2 in sludge conditioning pond 4 be provided with liquidometer 43.
Described powdery amendment feed bin 1, powdery amendment transfer roller 2, conditioning agitator 41, make newborn agitator 32, intake pump 33, enter dredge pump 8 and volume pump 10, liquidometer 43 is all by 5 controls of PLC central controller.
Sludge conditioning pond 4 in the described the first step is two or more.
Amendment solution throwing device 11 in described step 1 is connected with amendment solution-preparation device 12, and amendment solution-preparation device 12 is prepared into amendment solution by solid, powdery amendment, and to be delivered to amendment solution throwing device 11 interior stand-by.
Implement the device of the technology of the present invention, comprise powdery amendment feed bin 1, powdery amendment transfer roller 2, sludge conditioning pond 4, in sludge conditioning pond 4, be provided with conditioning agitator 41, sludge conditioning pond 4 is provided with conditioning agitator motor and speed reduction unit 42, mud enters in sludge conditioning pond 4 in sludge sump 9 by entering mud pipeline 7, the top in described sludge conditioning pond 4 is connected with powdery amendment emulsion preparation and throwing device 3, and described sludge conditioning pond 4 is also connected with amendment solution throwing device 11.
The other end of amendment solution throwing device 11 is connected with amendment solution-preparation device 12.
4 upper ends, sludge conditioning pond are connected with line mixer 6, and the mud in sludge sump 9 is by entering dredge pump 8 and entering after mud pipeline 7 is connected to enter in line mixer 6; Amendment solution in amendment solution throwing device 11 enters in line mixer 6 after by volume pump 10.
Powdery amendment feed bin, powdery amendment transfer roller 2, conditioning agitator motor and speed reduction unit 42, make newborn agitator motor and speed reduction unit 31, liquidometer 43, intake pump 33, enter dredge pump 8 and volume pump 10, liquid level machine are all electrically connected to PLC central controller 5, realize centralized Control.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. the multistage hybrid technique of Sludge Chemical Conditioning, is characterized in that comprising the following steps:
The first step: the mud in sludge sump (9) is entered to line mixer (6) with constant rate by entering mud pipeline (7) with entering dredge pump (8), open amendment solution throwing device (11), volume pump (10) simultaneously, amendment solution is transported in line mixer (6) and synchronizes with mud and carry out one-level mixing, mixed mud flow in sludge conditioning pond (4) through line mixer (6) outlet conduit, by the conditioning agitator (41) of installing in sludge conditioning pond (4), carries out secondary mixing;
Second step: after secondary mixing finishes, open powdery amendment feed bin (1), open powdery amendment emulsion preparation and throwing device (3), intake pump (33) extracts in sludge conditioning pond (4) the mixed mud of secondary with constant rate, open powdery amendment feed bin (1) bottom discharge port, inlet amount is controlled by the weighing device being arranged on powdery amendment feed bin (1), the discharge port that powder enters powdery amendment transfer roller (2) opening for feed of installing bottom and is transported to specified location is added in the opening for feed of powdery amendment emulsion preparation and throwing device (3), the mixed mud of secondary and powder are realized three grades and are mixed with stirring in throwing device (3) at powdery amendment emulsion preparation, emulsion discharge pipe (35) by powdery amendment emulsion preparation and throwing device (3) overflows in sludge conditioning pond (4) voluntarily afterwards, by the conditioning agitator (41) of having opened in sludge conditioning pond (4), carry out level Four mixing, so far powdery amendment adds end, conditioning agitator (41) some time in sludge conditioning pond (4) is uniformly mixed again, the multistage hybrid technique of Sludge Chemical Conditioning completes.
2. the multistage hybrid technique of Sludge Chemical Conditioning according to claim 1, it is characterized in that: the powdery amendment emulsion preparation in described step 2 and throwing device (3) comprise stirred pot (30), in stirred pot (30), be provided with system newborn agitator (32), make newborn agitator (32) and be provided with the newborn agitator motor of system and speed reduction unit (31), on stirred pot (30) sidewall, mid-way is connected with inlet channel (34) and emulsion discharge pipe (35), the upper surface of stirred pot (30) is also connected with dedusting outlet conduit (36), inlet channel (34) is connected with stirred pot (30) sidewall by intake pump (33), amendment emulsion preparation and throwing device (3) opening for feed place, upper end is connected with powdery amendment transfer roller (2), the other end of powdery amendment transfer roller (2) is connected with powdery amendment feed bin (1).
3. the multistage hybrid technique of Sludge Chemical Conditioning according to claim 2, is characterized in that: the sludge conditioning pond (4) in described step 1 and step 2 is provided with liquidometer (43).
4. the multistage hybrid technique of Sludge Chemical Conditioning according to claim 2, is characterized in that: described powdery amendment feed bin (1), powdery amendment transfer roller (2), conditioning agitator (41), make newborn agitator (32), intake pump (33), enter dredge pump (8) and volume pump (10), liquidometer (43) are all controlled by PLC central controller (5).
5. the multistage hybrid technique of Sludge Chemical Conditioning according to claim 1, is characterized in that: the sludge conditioning pond (4) in the described the first step is two or more.
6. the multistage hybrid technique of Sludge Chemical Conditioning according to claim 1, it is characterized in that: the amendment solution throwing device (11) in described step 1 is connected with amendment solution-preparation device (12), amendment solution-preparation device (12) is prepared into amendment solution by solid, powdery amendment and is delivered in amendment solution throwing device (11) stand-by.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210022028.6A CN103241920B (en) | 2012-02-01 | 2012-02-01 | Chemical conditioning multistage mixing technology of sludge |
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| CN201210022028.6A CN103241920B (en) | 2012-02-01 | 2012-02-01 | Chemical conditioning multistage mixing technology of sludge |
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| CN103241920B true CN103241920B (en) | 2014-04-16 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310735B (en) * | 2014-11-10 | 2016-01-27 | 中国计量学院 | Mobile water body sewage sludge extracts cleaning plant |
| CN104692611B (en) * | 2015-02-15 | 2017-05-17 | 南京中衡元环保设备有限公司 | Waste catalyst mud water dehydration treatment equipment and waste catalyst mud water dehydration treatment method |
| CN106316056A (en) * | 2015-09-09 | 2017-01-11 | 无锡亮慧环保机械有限公司 | Sludge chemical conditioning mixing pipe structure |
| CN107935354A (en) * | 2016-10-13 | 2018-04-20 | 光大水务（深圳）有限公司 | Sewage sludge continuous band and the complete processing system of heat pump desiccation and processing method |
| CN107216015A (en) * | 2017-07-11 | 2017-09-29 | 江苏坤泽科技股份有限公司 | A kind of method of mud stirring quantitative feeding mixing |
| CN107226598A (en) * | 2017-08-03 | 2017-10-03 | 福建润土工程科技有限公司 | One-stop mud disposal system |
| CN108611253A (en) * | 2018-05-03 | 2018-10-02 | 天津亿利科能源科技发展股份有限公司 | A kind of salt tolerant Black Liquor with Efficient Bacteria activated sludge prepares storage device and breeding method |
| CN110240385A (en) * | 2019-07-17 | 2019-09-17 | 上海同臣环保有限公司 | A kind of on-line continuous opsonic reaction device for deep sludge dewatering process mud chemical conditioning |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2145580C1 (en) * | 1998-11-10 | 2000-02-20 | Предприятие "Кубаньгазпром" | Bore mud neutralizing and utilizing apparatus |
| DE19913357C2 (en) * | 1999-03-24 | 2001-06-21 | Fernwasserversorgung Suedthuer | Process for thin sludge pressing in the rinse water treatment of a drinking water treatment plant |
| CN1774404A (en) * | 2003-04-11 | 2006-05-17 | 洪尚宪 | Sludge concentration system and process which have functions for automatically charging a coagulant and for automatically controlling the concentration of sludge |
| CN201116292Y (en) * | 2007-05-11 | 2008-09-17 | 广州普得环保设备有限公司 | Multifunctional continuous sludge treatment system |
| CN201825835U (en) * | 2010-11-01 | 2011-05-11 | 宇星科技发展(深圳)有限公司 | Novel sludge conditioning device |
-
2012
- 2012-02-01 CN CN201210022028.6A patent/CN103241920B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2145580C1 (en) * | 1998-11-10 | 2000-02-20 | Предприятие "Кубаньгазпром" | Bore mud neutralizing and utilizing apparatus |
| DE19913357C2 (en) * | 1999-03-24 | 2001-06-21 | Fernwasserversorgung Suedthuer | Process for thin sludge pressing in the rinse water treatment of a drinking water treatment plant |
| CN1774404A (en) * | 2003-04-11 | 2006-05-17 | 洪尚宪 | Sludge concentration system and process which have functions for automatically charging a coagulant and for automatically controlling the concentration of sludge |
| CN201116292Y (en) * | 2007-05-11 | 2008-09-17 | 广州普得环保设备有限公司 | Multifunctional continuous sludge treatment system |
| CN201825835U (en) * | 2010-11-01 | 2011-05-11 | 宇星科技发展(深圳)有限公司 | Novel sludge conditioning device |
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