CN106925006A - Press filtration unit, filter-pressing device and mud dewatering method - Google Patents
Press filtration unit, filter-pressing device and mud dewatering method Download PDFInfo
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- CN106925006A CN106925006A CN201710177554.2A CN201710177554A CN106925006A CN 106925006 A CN106925006 A CN 106925006A CN 201710177554 A CN201710177554 A CN 201710177554A CN 106925006 A CN106925006 A CN 106925006A
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- 238000001914 filtration Methods 0.000 title claims abstract description 47
- 238000003825 pressing Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 16
- 239000010802 sludge Substances 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 230000005611 electricity Effects 0.000 claims abstract description 10
- 230000000717 retained effect Effects 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 11
- 230000005684 electric field Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- XTKDAFGWCDAMPY-UHFFFAOYSA-N azaperone Chemical compound C1=CC(F)=CC=C1C(=O)CCCN1CCN(C=2N=CC=CC=2)CC1 XTKDAFGWCDAMPY-UHFFFAOYSA-N 0.000 claims 1
- 239000010408 film Substances 0.000 description 49
- 230000018044 dehydration Effects 0.000 description 21
- 238000006297 dehydration reaction Methods 0.000 description 21
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010801 sewage sludge Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000165940 Houjia Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
- B01D25/215—Construction of the filter plates, frames
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of press filtration unit.The press filtration unit includes the first filter,Second filter,The mud chamber that is formed between the first filter and the second filter and through first filter,The sludge circulation passage of the second filter and mud chamber,First filter and the second filter include framework and are connected across filter medium between framework,The framework is provided with liquid outlet,Clear liquid circulation passage is provided with the filter medium,From the sludge circulation passage flow into mud chamber sludge after the filter media gained clear liquid flow through clear liquid circulation passage successively,Discharged after liquid outlet,And gained siccative is then stored in mud chamber after being retained through the filter medium,Also include the first filter-press arrangement,Control system of first filter-press arrangement including the electricity applying system for making first filter and the second filter oppositely charged and the electric charge attribute that first filter and the second filter are exchanged according to intervals.
Description
Technical field
The present invention relates to sludge dewatering technical field, in particular to press filtration unit, filter-pressing device and sludge dewatering
Method.
Background technology
Existing sludge dewatering technology mainly has following three kinds：1) Thermal dehydration：Dried using thermals source such as heat smoke, vapours
Roasting sludge, makes moisture evaporation in sludge, reduces sludge moisture content.Sludge moisture content drops to less than 30%, profit after Thermal dehydration
In later use and disposal, but investment and operating cost are very high, and energy utilization rate is low.2) mechanical dehydration (plate and frame type filter-press, railway carriage or compartment
Formula filter press, belt type dewaterer, centrifugal dehydrator, Die Shi dewaterers, spiral pressing dehydrator etc.)：Forced using extrusion principle
Moisture in extrusion sludge.The investment of mechanical dehydration is small, and device is simple to operation, but can not remove and combine water, through tradition machinery
The moisture percentage in sewage sludge of dewatering treatment still has 80% or so, it is impossible to meet the requirement of later use and landfill；3) chemical conditioning+
Diaphragm plate frame：A large amount of quick limes, molysite are first added, additive quality accounts for more than 20%, Ran Houjia of sludge butt gross mass
Enter, flocculated colloid, albumen etc. carry out mechanical dehydration subsequently into diaphragm plate frame.Required device simple, can be by moisture percentage in sewage sludge control
System is 60% or so；But because additive amount accounts for sludge butt more than 20%, sludge quantity does not drop anti-increasing, increased follow up device
Treatment load and cost of transportation, reduce the calorific value of sludge, are unfavorable for the processing methods such as incineration.
Mechanical dehydration is conventional dewatering, wherein, chamber-type press filter is a kind of conventional mechanical dewatering equipment.It is existing
Chamber-type press filter include the filters of multiple concatenation fastenings, by adjacent head plate shape into mud chamber and through all filters
With the sludge circulation passage of mud chamber, inside the filter medium of each filter including both sides, liquid outlet and filter medium
Clear liquid circulation passage, when making sludge flow into mud chamber from the sludge circulation passage with certain speed, the moisture in sludge
The filter medium, gained clear liquid can be passed through to be discharged after flowing through clear liquid circulation passage, liquid outlet successively under pressure itself effect,
And gained siccative is then stored in mud chamber after being retained through the filter medium 6.Although the chamber-type press filter has to change filtering
The convenient advantage of medium, but have the disadvantage that dehydration rate is low, it is general by the way of feed pressure is lifted in order to lift its dehydration rate,
But filter is easily damaged when feed pressure higher is born, notable reduction of service life.
The content of the invention
It is existing to solve it is a primary object of the present invention to provide press filtration unit, filter-pressing device and mud dewatering method
The low problem of dehydration rate that chamber filter press in technology is present.
To achieve these goals, there is provided a kind of press filtration unit.The press filtration unit includes the first filter, the second filtering
Plate, the mud chamber being formed between the first filter and the second filter and through first filter, the second filter
With the sludge circulation passage of mud chamber, first filter and the second filter include framework and are connected across mistake between framework
Filter medium, the framework is provided with liquid outlet, and clear liquid circulation passage is provided with the filter medium, from the sludge circulation passage
The sludge clear liquid obtained by after the filter media for flowing into mud chamber flows through clear liquid circulation passage, liquid outlet heel row successively
Go out, and gained siccative is then stored in mud chamber after being retained through the filter medium, also including the first filter-press arrangement, described first
Filter-press arrangement includes making the electricity applying system of first filter and the second filter oppositely charged and according to certain hour
It is spaced to exchange the control system of the electric charge attribute of first filter and the second filter.
Sludge is with respect to all carrying slight negative electrical charge, but the solid particle in sludge and surrounding medium solution conduct for water
One entirety is electroneutral, and in order to balance these negative electrical charges, mud granule surface must carry conversely in adsorbing medium solution
The cation of electric charge.Counter ion in the surrounding medium that the negative electrical charge of solid particles surface is adsorbed with it constitutes electric double layer, in electricity
Under field action, the cation of sewage sludge solid particle surface absorption carries moisture can be to movable cathode.First, made by the system of adding some points
Make first filter and the second filter oppositely charged so that moisture in sludge is total to electric field force and feed pressure
Negatively charged filter medium is passed through under same-action, so as to be further dehydrated to sludge.Secondly, control system is according to certain
Time interval exchanges the electric charge attribute of first filter and the second filter so that the moving direction of the moisture in sludge
According to the time interval in 180 ° of change, not only dehydration rate is higher, and moisture distribution in gained siccative is evenly, is easy to
Subsequent treatment.Furthermore, under electric field action, sludge can be heated to 80 DEG C or so, can kill most of harmful bacteria, can cancel dirt
Mud disinfects process.Additionally, feed pressure is kept low, the service life of filter can be obviously improved.
Further, it is described also including the second filter-press arrangement in first filter and/or the second filter
Second filter-press arrangement includes can be towards the raised elastic film to extrude sludge of the mud chamber, the elastic film and the filtering
The clear liquid circulation passage is formed between medium.Thus, raised elastic film can be pressed further by the sludge in mud chamber, enter
One step lifts dehydration rate.
Further, second filter-press arrangement also includes that the extrusion medium in the framework is imported and exported, the bullet
Property film include the first film and the second film that are connected across in framework and are oppositely arranged, the first film and the second film it
Between formed with the extrusion medium import and export conducting cavity.Thus, by adjusting the extrusion medium volume filled in cavity, i.e.,
The degree of convexity of the elastic film is can control, so as to control dehydration rate.The extrusion medium can be liquid or gas.
Further, the first film and/or the second film include film bulk and positioned at the film bulk with
Between filter medium multiple first are raised, and the clear liquid circulation passage is formed between adjacent first projection.Thus, it is possible to using
Solid film bulk, can lift the intensity of filter on the premise of more clear liquid circulation passage is kept.
Further, also including the first dividing plate between the first film and the second film, first dividing plate
Side and the first film form the first cavity, opposite side and the second film the second cavity of formation.Thus, one can be further
The intensity of filter is lifted, two come using the projection that make the elastic film generation larger by less extrusion medium.
Further, the both sides of first dividing plate are respectively provided with annular recess.Thus, elastic film edge place can be weakened
Extruding force suffered by the extruding force received and remaining position of lifting, protects while the probability that elastic film is peeled off with framework 5 is reduced
Hold preferable squeezing effect.
Further, being not provided with first filter or the second filter of the second filter-press arrangement includes being connected across the framework
On second partition, the second partition includes clapboard body and between the second partition body and filter medium
Multiple second is raised, and the clear liquid circulation passage is formed between adjacent second projection.Thus, simple structure, intensity are high and are dehydrated
Rate is high.
Further, the framework includes first connecting portion and second connecting portion, and the thickness of the first connecting portion is more than
The thickness of second connecting portion, the first connecting portion is fastenedly connected with the filter medium；Thus, for filter medium is provided necessarily
Heave space, it is ensured that filter medium is not supportted bad when elastic film is raised.
Further, the filter medium uses porous metal film.Thus, the intensity of filter medium is higher and is easy to carry
Electric charge.
To achieve these goals, a kind of filter-pressing device is additionally provided.The filter-pressing device includes the upper of multiple concatenation fastenings
Press filtration unit is stated, mud chamber is formed between adjacent press filtration unit.
Compared with prior art, filter-pressing device of the invention has dehydration rate higher, relatively low filter pressure and more long
Service life.
To achieve these goals, a kind of mud dewatering method is additionally provided.The mud dewatering method include operation 1), behaviour
Make 2) and operate 3), wherein,
Operation is 1)：Sludge is passed through mud chamber with given pace, the moisture in sludge was passed through under feed pressure effect
Filter medium；
Operation is 2)：Apply opposite electric charge to the first filter and the second filter and make first filter and second
The electric charge attribute of filter is exchanged according to intervals so that the moisture in sludge passes through negatively charged under electric field force effect
The filter medium of lotus；
Operation is 3)：Imported and exported from extrusion medium and be passed through extrusion medium toward in cavity so that elastic film is convex towards mud chamber
Rise, make the moisture in sludge that filter medium is passed through under the squeezing action of elastic film；
When it is described operation 2) and operation 3) with operate 1) while when carrying out, feed time is 1.5-2h；When operation 2) and behaviour
When making 3) to be carried out after the completion of operation 1), charging is stopped when it is 1-1.5MPa that 1) operation is carried out to feed pressure, then carried out
Operate 2) and/or operate 3)；It is described operation 2), operation 3) can simultaneously carry out or individually carry out.
When the operation 2) and operation 3) with operate 1) while when carrying out, if feed time is long, the feed pressure in later stage
Can be obviously improved, this can cause certain infringement to filter, if feed time is too short, can significantly reduce dehydration rate.Work as operation
2) when 3) being carried out after the completion of operation 1) with operation, if stopping charging again when too high feed pressure is reached, time-consuming and meeting
Infringement filter, if just stopping charging in relatively low filter pressure, although the dewatering speed of single is very fast, but single is dehydrated
Siccative can not be made to be full of mud chamber, in addition it is also necessary to feed again, increased number of operations.It is preferred that 1) being carried out to charging using in operation
Carry out operation 2 after stopping charging when pressure is 1-1.5MPa) and/or operation is 3), such pattern more suitable for various concentration and
The sludge of composition, can be such that the number of times of charging reaches at least, shorten overall dewatering time.
Compared with prior art, the process is simple of mud dewatering method of the invention, can according to the water content of sludge and
Property uses different operative combinations.
Further, the electric charge attribute of first filter and the second filter is handed over according to the time interval of 5-15min
Change, the voltage of the electricity applying system that 2) operation uses is 1-40V；Water content≤60% of gained sludge；Gained clear liquid it is turbid
Degree≤1Ntu.Thus, dehydration rate is high and gained clear liquid can direct reuse in the Treated sewage reusing project such as landscape, pouring.
It can be seen that, press filtration unit of the invention can make sludge under the collective effect of feed pressure and electric field force in moisture
Through filter medium, dehydration rate is obviously improved.Further, it is also possible to apply extruding force to extrude the moisture in sludge to sludge, enter
One step lifts dehydration rate.Compared with prior art, filter-pressing device of the invention has dehydration rate higher, relatively low filter pressure
Service life more long.The process is simple of mud dewatering method of the invention, can adopt according to the water content of sludge and property
With different operative combinations.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent
Point will be set forth in part in the description, and partly will become apparent from the description below, or by practice of the invention
Solve.
Brief description of the drawings
The accompanying drawing for constituting a part of the invention is used for aiding in the understanding of the present invention, content provided in accompanying drawing and its
Explanation relevant in the present invention can be used to explain the present invention, but not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the press filtration unit of embodiment 1.
Fig. 2 is the schematic diagram (filter medium is not shown) of the first filter of embodiment 1.
Fig. 3 is the partial schematic diagram of the filter-pressing device of embodiment 1.
Fig. 4 is the structural representation of the press filtration unit of embodiment 2.
Fig. 5 is the schematic diagram (filter medium is not shown) of the second filter of embodiment 2.
Fig. 6 is the partial schematic diagram of the filter-pressing device of embodiment 2.
Fig. 7 is the structural representation of the press filtration unit of embodiment 3.
Fig. 8 is the partial schematic diagram of the filter-pressing device of embodiment 3.
Fig. 9 is the structural representation of the press filtration unit of embodiment 4.
Figure 10 is the structural representation of filter-pressing device of the invention.
Specific embodiment
Clear, complete explanation is carried out to the present invention below in conjunction with the accompanying drawings.Those of ordinary skill in the art are based on these
It is possible to realize the present invention in the case of explanation.Before with reference to accompanying drawing, the present invention will be described, it is necessary to it is emphasized that：
(1) technical scheme and technical characteristic provided in each several part in the present invention including including the description below,
In the case of not conflicting, these technical schemes and technical characteristic can be mutually combined.
(2) embodiments of the invention being related in the description below are generally only the embodiment of a part of the invention, without
It is whole embodiments.Therefore, based on the embodiment in the present invention, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained on the premise of dynamic, should all belong to the scope of protection of the invention.
(3) on the explanation to term in the present invention.In description and claims of this specification and relevant part
Term " first ", " second " etc. be easily to cause the object for confusing for distinguishing, without for describe specific order or
Precedence.Additionally, term " comprising " and " having " and their any deformation, it is intended that covering is non-exclusive to be included.
Term " dehydration rate "=clear liquid weight/sludge gross weight.The gross weight of term " water content "=sludge reclaimed water/sludge gross weight.
By the obstruction degree occurred when suspension is passed through to light in water, its unit " Ntu " refers to nephelometric turbidity unit to term " turbidity ",
Show instrument with incident light direction at an angle of 90 on measure scattered light intensity.
It should be noted that the flexible, porous that the porous metal film is announced by Chinese invention patent CN104759629A
Metal foil, its average pore size is 0.1-1 μm, and thickness is 0.3-0.5mm.The elastic film barrier film be it is a kind of under pressure
Can deform upon and the thin-film material of original appearance can be recovered when pressure is cancelled, i.e., reversible deformation can occur, can use but
It is not limited to organic macromolecule rubber.
Embodiment 1
Press filtration unit as shown in Fig. 1-3,10, including the first filter 1, the second filter 2, it is formed at the first filter
1 and second mud chamber 3 between filter 2 and the sludge through first filter 1, the second filter 2 and mud chamber 3
Circulation passage 4, the filter 2 of first filter 1 and second includes framework 5 and is connected across filter medium 6 between framework 5,
The framework 5 is provided with liquid outlet 7, the filter medium 6 and is provided with clear liquid circulation passage 8, is flowed from the sludge circulation passage 4
The sludge clear liquid obtained by after the filtering of the filter medium 6 for entering mud chamber 3 flows through clear liquid circulation passage 8, the heel row of liquid outlet 7 successively
Go out, and gained siccative is then stored in mud chamber 3 after being retained through the filter medium 6, also including the first filter-press arrangement, described the
One filter-press arrangement includes making the electricity applying system 101 of the oppositely charged of 1 and second filter of the first filter 2 and according to one
Interval is fixed time to exchange the control system 102 of the electric charge attribute of the filter 2 of first filter 1 and second.
The filter 2 of first filter 1 and second includes the second partition 12 being connected across in the framework 5, described the
Two dividing plates 12 include that clapboard body 121 and the multiple second between the body of the second partition 12 and filter medium 6 are convex
122 are played, the clear liquid circulation passage 8 is formed between adjacent second projection 122.
The framework 5 includes first connecting portion 51 and second connecting portion 52, and the thickness of the first connecting portion 51 is more than the
The thickness of two connecting portions 52, the first connecting portion 51 is fastenedly connected with the filter medium 6；
The filter medium 6 uses porous metal film, and its average pore size is 1 μm, and thickness is 0.5mm..
Filter-pressing device as shown in figs. 3 and 10, including shown in multiple Fig. 1 using the concatenation fastening of hold-down gear 103
Mud chamber 3 is formed between press filtration unit, adjacent press filtration unit.
1) mud dewatering method of the present embodiment includes operating and operates 2), wherein,
Operation 1：In the case where pumping action is fed, sludge 105 is set to enter sludge after flowing through sludge circulation passage 4 with certain speed
Chamber 3, under the feed pressure of feed pump, the portion of water in sludge 105 passes through filter medium 6 and flows through clear liquid circulation successively
Discharged after passage 8, liquid outlet 7；
Operation is 2)：The direct current of 40V is passed through using electricity applying system 101, makes positively charged, the second filtering of the first filter 1
Plate 2 is negatively charged and keeps 5min, and now, the moisture in sludge 105 is in the presence of electric field force through the mistake of the second filter 2
Filter medium 6；Then the electric charge of the first filter 1 is made to become negative, the second filter 2 electric charge by bearing by positive using control system 102
Become just and continue to keep 5min, now, the moisture in sludge 105 is in the presence of electric field force through the filtering of the first filter 1
Medium 6；By that analogy, the electric charge attribute of the filter 2 of first filter 1 and second is made to be handed over according to the time interval of 5min
Change；
When operation is 1) with operation 2) while when carrying out, feed time is 1.5h；When 2) operation enters again after the completion of operation 1)
During row, material inlet valve is closed when it is 1MPa that 1) operation is carried out to feed pressure, then carry out operation 2).
The feed pump includes low pressure sludge pump 106 and high pressure sludge pump 107 in parallel；
Sludge 105 is deposited in sludge-tank 104, is carrying out operation 1) before, using pump 109 by flocculant storage bin 108
In flocculant pump into sludge-tank 104, to reduce the filter pressure of filter-pressing device, the addition quality of the flocculant is sludge
The 1% of siccative quality in 105.
By control operation 2) time for carrying out, water content≤60% of gained siccative, the turbidity of gained clear liquid can be made
All the time≤1Ntu.
Embodiment 2
Press filtration unit as shown in Fig. 4-6,10, including the first filter 1, the second filter 2, it is formed at the first filter
1 and second mud chamber 3 between filter 2 and the sludge through first filter 1, the second filter 2 and mud chamber 3
Circulation passage 4, the filter 2 of first filter 1 and second includes framework 5 and is connected across filter medium 6 between framework 5,
The framework 5 is provided with liquid outlet 7, the filter medium 6 and is provided with clear liquid circulation passage 8, is flowed from the sludge circulation passage 4
The sludge clear liquid obtained by after the filtering of the filter medium 6 for entering mud chamber 3 flows through clear liquid circulation passage 8, the heel row of liquid outlet 7 successively
Go out, and gained siccative is then stored in mud chamber 3 after being retained through the filter medium 6, also including the first filter-press arrangement, described the
One filter-press arrangement includes making the electricity applying system 101 of the oppositely charged of 1 and second filter of the first filter 2 and according to one
Interval is fixed time to exchange the control system 102 of the electric charge attribute of the filter 2 of first filter 1 and second.
Also include the second filter-press arrangement in second filter 2, second filter-press arrangement includes can be towards institute
State the projection of mud chamber 3 and import and export 10, the elasticity to extrude the elastic film of sludge, the extrusion medium in the framework 5
Film includes the film 92 of the first film 91 and second for being connected across in framework 5 and being oppositely arranged, the first film 91 and second
The cavity 11 that 10 conductings are imported and exported with the extrusion medium is formed between film 92；The film 92 of the first film 91 and second is wrapped
Include film bulk 901 and multiple first projections 902 between the film bulk 901 and filter medium 6, adjacent first
The clear liquid circulation passage 8 is formed between raised 902.
First filter 1 includes being connected across second partition 12 in the framework 5, the second partition 12 include every
Plate body 121 and multiple second projections 122 between the body of the second partition 12 and filter medium 6, adjacent second
The clear liquid circulation passage 8 is formed between raised 122.
The framework 5 includes first connecting portion 51 and second connecting portion 52, and the thickness of the first connecting portion 51 is more than the
The thickness of two connecting portions 52, the first connecting portion 51 is connected with the filter medium 6；
The filter medium 6 uses porous metal film, and its average pore size is 0.1 μm, and thickness is 0.3mm.
Filter-pressing device as shown in figs. 6 and 10, including shown in multiple Fig. 4 using the concatenation fastening of hold-down gear 103
Mud chamber 3 is formed between press filtration unit, adjacent press filtration unit.
The mud dewatering method of the present embodiment include operation 1), operation 2) and operation 3, wherein,
Operation 1：In the case where pumping action is fed, sludge 105 is set to enter sludge after flowing through sludge circulation passage 4 with certain speed
Chamber 3, under the feed pressure of feed pump, the portion of water in sludge 105 passes through filter medium 6 and flows through clear liquid circulation successively
Discharged after passage 8, liquid outlet 7；
Operation is 2)：The direct current of 1V is passed through using electricity applying system 101, makes positively charged, the second filter of the first filter 1
2 is negatively charged and keep 15min, and now, the moisture in sludge 105 is in the presence of electric field force through the mistake of the second filter 2
Filter medium 6；Then the electric charge of the first filter 1 is made to become negative, the second filter 2 electric charge by bearing by positive using control system 102
Become just and continue to keep 15min, now, the moisture in sludge 105 is in the presence of electric field force through the filtering of the first filter 1
Medium 6；By that analogy, the electric charge attribute of the filter 2 of first filter 1 and second is made to be handed over according to the time interval of 15min
Change；
Operation is 3)：Using kinetic pump 111 by the liquid in tank 110 from extrusion medium import and export 10 be passed through in cavity 11 from
And make elastic film raised towards mud chamber 3, make the moisture in sludge 105 that filter medium is passed through under the squeezing action of elastic film
6；
When operation 1), operation 2) and operation 3) while when carrying out, feed time is 2h；When 3) 2) operation operating with operation
1) when being carried out again after the completion of, material inlet valve is closed when it is 1.5MPa that 1) operation is carried out to feed pressure；3) operation 2 and operation are begun
Carry out simultaneously eventually.
The feed pump includes low pressure sludge pump 106 and high pressure sludge pump 107 in parallel；
Sludge 105 is deposited in sludge-tank 104, is carrying out operation 1) before, using pump 109 by flocculant storage bin 108
In flocculant pump into sludge-tank 104, to reduce the filter pressure of filter-pressing device, the addition quality of the flocculant is sludge
The 1% of siccative quality in 105.
By control operation 2) and the time for 3) carrying out is operated, water content≤60% of gained siccative can be made, gained is clear
The turbidity of liquid all the time≤1Ntu.
Embodiment 3
The press filtration unit of the present embodiment is with the difference of the press filtration unit of embodiment 2：As Figure 7-8, described first
The second filter-press arrangement also is provided with filter 1.Due to the sludge in mud chamber 3 be subject to both sides extruding force, so when use with
During 2 identical mud dewatering method of embodiment, the dehydration rate of the dehydration device of the present embodiment is higher and gained siccative in moisture
It is more evenly distributed.
Embodiment 4
The press filtration unit of the present embodiment is with the difference of embodiment 2 or the press filtration unit of embodiment 3：As shown in figure 9,1)
Second filtration also includes the first dividing plate 13 between the film 92 of the first film 91 and second, described first
The side of dividing plate 13 forms the first cavity 111 with the first film 91, and opposite side and the second film 92 form the second cavity 112；By
In the first solid dividing plate 13 can be used, therefore the intensity of filter-pressing device can be further lifted, increased the service life.Due to chamber
The diminution of body 11, can make the elastic film produce larger projection, so as to produce larger using less extrusion medium
Extruding force；2) both sides of first dividing plate 13 are respectively provided with annular recess 130, therefore, the extruding suffered by elastic film edge
Power is weakened, and the extruding force suffered by remaining position gets a promotion so that reducing the probability that elastic film is peeled off with framework 5
While keep preferable squeezing effect.
Claims (10)
1. press filtration unit, including the first filter (1), the second filter (2), be formed at the first filter (1) and second filtering
Mud chamber (3) between plate (2) and the sludge through first filter (1), the second filter (2) and mud chamber (3)
Circulation passage (4), first filter (1) and the second filter (2) are including framework (5) and between being connected across framework (5)
Filter medium (6), the framework (5) is provided with liquid outlet (7), the filter medium (6) and is provided with clear liquid circulation passage (8),
Gained clear liquid flows successively after the sludge for flowing into mud chamber (3) from the sludge circulation passage (4) is filtered through the filter medium (6)
Discharged after (7) through clear liquid circulation passage (8), liquid outlet, and gained siccative is then stored in dirt after being retained through the filter medium (6)
In mud chamber (3), it is characterised in that：Also include the first filter-press arrangement, first filter-press arrangement includes making first filter
(1) and the second filter (2) oppositely charged electricity applying system (101) and exchange described first according to intervals
The control system (102) of the electric charge attribute of filter (1) and the second filter (2).
2. press filtration unit as claimed in claim 1, it is characterised in that：Also include located at first filter (1) and/or the
The second filter-press arrangement in two filters (2), second filter-press arrangement includes can be raised to extrude dirt towards the mud chamber (3)
The elastic film of mud, forms the clear liquid circulation passage (8) between the elastic film and the filter medium (6).
3. press filtration unit as claimed in claim 2, it is characterised in that：Second filter-press arrangement also includes being located at the framework
(5) extrusion medium on imports and exports (10), and the elastic film includes the first film for being connected across in framework (5) and being oppositely arranged
(91) and the second film (92), formed between the first film (91) and the second film (92) and the extrusion medium is imported and exported
(10) cavity (11) of conducting；The first film (91) and/or the second film (92) is including film bulk (901) and is located at
Multiple first raised (902) between the film bulk (901) and filter medium (6), shape between adjacent first raised (902)
Into the clear liquid circulation passage (8).
4. press filtration unit as claimed in claim 3, it is characterised in that：Also include thin located at the first film (91) and second
The first dividing plate (13) between film (92), side and the first film (91) of first dividing plate (13) form the first cavity
(111), opposite side and the second film (92) form the second cavity (112).
5. press filtration unit as claimed in claim 4, it is characterised in that：It is recessed that the both sides of first dividing plate (13) are respectively provided with ring-type
Fall into (130).
6. press filtration unit as claimed in claim 2, it is characterised in that：It is not provided with first filter (1) of the second filter-press arrangement
(1) or the second filter (2) includes the second partition (12) that is connected across in the framework (5), the second partition (12) includes
Clapboard body (121) and multiple second projections between the second partition (12) body and filter medium (6)
(122), the clear liquid circulation passage (8) is formed between adjacent second raised (122).
7. press filtration unit as claimed in claim 1, it is characterised in that：The framework (5) includes first connecting portion (51) and
Two connecting portions (52), the thickness of the thickness more than second connecting portion (52) of the first connecting portion (51), the first connecting portion
(51) it is fastenedly connected with the filter medium (6)；The filter medium (6) uses porous metal film.
8. the press filtration unit of filter-pressing device, including multiple concatenation fastenings, it is characterised in that：The press filtration unit is claim 1-
One of 7 described press filtration units, form mud chamber (3) between adjacent press filtration unit.
9. application claim 8 described in filter-pressing device mud dewatering method, including operation 1), operation 2) and operation 3), its
In,
Operation is 1)：Sludge is passed through mud chamber (3) with given pace, the moisture in sludge is under feed pressure effect through filtering
Medium (6)；
Operation is 2)：Apply opposite electric charge to the first filter (1) and the second filter (2) and make first filter (1)
Electric charge attribute with the second filter (2) is exchanged according to intervals so that the moisture in sludge is under electric field force effect
Through negatively charged filter medium (6)；
Operation is 3)：(10) are imported and exported toward being passed through extrusion medium in cavity (11) so that elastic film is towards mud chamber from extrusion medium
(3) it is raised, make the moisture in sludge that filter medium (6) is passed through under the squeezing action of elastic film；
When it is described operation 2) and operation 3) with operate 1) while when carrying out, feed time is 1.5-2h；When operation 2) with operation 3)
When being carried out after the completion of operation 1), charging is stopped when it is 1-1.5MPa that 1) operation is carried out to feed pressure, then operated
2) and/or operation 3)；It is described operation 2), operation 3) can simultaneously carry out or individually carry out.
10. mud dewatering method as claimed in claim 9, it is characterised in that：First filter (1) and the second filter
(2) electric charge attribute is exchanged according to the time interval of 5-15min, and the voltage of the electricity applying system that 2) operation uses is 1-40V；
Water content≤60% of gained sludge；Turbidity≤the 1Ntu of gained clear liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177554.2A CN106925006A (en) | 2017-03-23 | 2017-03-23 | Press filtration unit, filter-pressing device and mud dewatering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177554.2A CN106925006A (en) | 2017-03-23 | 2017-03-23 | Press filtration unit, filter-pressing device and mud dewatering method |
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| Publication Number | Publication Date |
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| CN106925006A true CN106925006A (en) | 2017-07-07 |
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ID=59425115
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710177554.2A Pending CN106925006A (en) | 2017-03-23 | 2017-03-23 | Press filtration unit, filter-pressing device and mud dewatering method |
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| Country | Link |
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| CN (1) | CN106925006A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179953A (en) * | 2018-10-22 | 2019-01-11 | 湖北态科工业过滤系统设备有限公司 | A kind of high-pressure pressure filter integrated system |
| CN117839282A (en) * | 2024-03-09 | 2024-04-09 | 福建省创绿机械股份有限公司 | One-way diaphragm filter plate type filter press |
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| CN109179953A (en) * | 2018-10-22 | 2019-01-11 | 湖北态科工业过滤系统设备有限公司 | A kind of high-pressure pressure filter integrated system |
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