CN101367598A - Additive for sludge dewatering and sludge dewatering method - Google Patents
Additive for sludge dewatering and sludge dewatering method Download PDFInfo
- Publication number
- CN101367598A CN101367598A CNA2008101985378A CN200810198537A CN101367598A CN 101367598 A CN101367598 A CN 101367598A CN A2008101985378 A CNA2008101985378 A CN A2008101985378A CN 200810198537 A CN200810198537 A CN 200810198537A CN 101367598 A CN101367598 A CN 101367598A
- Authority
- CN
- China
- Prior art keywords
- mud
- filter
- pressure
- sludge dewatering
- filtrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000010802 sludge Substances 0.000 title claims description 62
- 239000000654 additive Substances 0.000 title description 8
- 230000000996 additive effect Effects 0.000 title description 3
- 239000000706 filtrate Substances 0.000 claims abstract description 46
- 238000001914 filtration Methods 0.000 claims abstract description 41
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 31
- 230000018044 dehydration Effects 0.000 claims abstract description 19
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 239000012752 auxiliary agent Substances 0.000 claims description 48
- 239000004744 fabric Substances 0.000 claims description 32
- 239000000835 fiber Substances 0.000 claims description 29
- 239000004743 Polypropylene Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 20
- -1 polypropylene Polymers 0.000 claims description 20
- 229920001155 polypropylene Polymers 0.000 claims description 20
- 239000010801 sewage sludge Substances 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 239000012779 reinforcing material Substances 0.000 claims description 4
- 238000009827 uniform distribution Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 20
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 238000007599 discharging Methods 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 4
- 238000011085 pressure filtration Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract 4
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000001963 growth medium Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 36
- 238000012360 testing method Methods 0.000 description 27
- 230000000694 effects Effects 0.000 description 22
- 239000012065 filter cake Substances 0.000 description 18
- 239000004952 Polyamide Substances 0.000 description 8
- 239000008187 granular material Substances 0.000 description 8
- 229920002647 polyamide Polymers 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 229920004933 Terylene® Polymers 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000010881 fly ash Substances 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical class Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 5
- 229920002401 polyacrylamide Polymers 0.000 description 5
- 238000009941 weaving Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 229920000715 Mucilage Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention relates to addition agent used for filthy mud dehydration, which is culture medium after edible mushrooms are picked. The usage amount of the addition agent is 5 to 10 percent by weight of the solid content of the filthy mud. The addition agent has the advantages of low specific impedance value of the filthy mud after the addition agent is added and high solid content ratio in filter mass after dehydration. In a method for filthy mud dehydration: pressure filtration dehydration is carried out with a plate and frame filter press, the filthy mud injection pressure is progressively increased, the sewage and filthy mud to be regulated is injected into a filter press at a certain injection pressure, and when the filter press is full, filtrate discharging flux is V1; when the filtrate discharging flux is lower than one half of V1, the filthy mud injection pressure is increased to a higher level, and the filtrate discharging flux is increased to V2; when the filtrate discharging flux is lower than one half of V2, the filthy mud injection pressure is increased to a higher level again, so that the filthy mud injection pressure is progressively increased to the preset pressure in this way, then feeding is stopped and the pressure is maintained, and finally the membrane extrusion is carried out. The method has the advantages of uniform increase of the density of mud cakes and small filtration resistance in filtration.
Description
Technical field
The present invention relates to a kind of auxiliary agent and mud dewatering method that is used for sludge dewatering.
Background technology
The key of sludge treatment is sludge dewatering, and this class mud is general moisture up to about 80%.It is four kinds that moisture in the mud is divided into by its existence: 1) interstitial water, interstitial water are the free water contents that mud granule surrounds, and generally account for about 70% of mud total water content; 2) capillary water, capillary water be between the mud granule or the particle crack in because the moisture that wicking action and mud granule combine accounts for about 20% of Total Water; 3) planar water, planar water are because capillary effect is adsorbed on the moisture on mud granule surface, because mud granule is little, have extremely strong surface adsorption power; 4) combination water, combination water are included in the intravital moisture of microorganism cells in the mud, the internal structure of the mud granule that only changes could with combined moisture from; Combination water and planar water account for about 10% of total water content in the mud together.
Interstitial water removes in theory easily, but because mud is to be formed by cotton-shaped colloid set, particle is very thin and very soft.When applying external force, gelationus subparticle will stop up and form the filter bridge, has increased the filtering resistance that compares; And because soft particle has certain compressibility, when external force increased, particle can form one deck hole very little " film " on the filtration medium surface, thereby makes water be difficult to pass through, and dehydration also just seems difficult unusually.
The simple mechanical dehydration that uses, the water ratio of dehydrated sludge is that the mud special property determines more than 70%.Sewage sludge forms a zone that is referred to as " viscose glue phase region " between moisture 55% to 65%, mud at this moment is the mucilage shape, and water molecules is wrapped up by one deck colloid, and the common mechanical pressing method is difficult to the water in the mud is disengaged.Evidence, this phenomenon mud moisture 60% to 65% particularly serious.If mud can dewater to the water ratio weight ratio be below 60%, even, broken through mud this " viscose glue phase region " to below 55%, mud has just had dispersed preferably, has just created good condition for the further processing of mud or disposal.Based on this, dewatering agent is applicable in the sludge dewatering in a large number.
Auxiliary agent in the dewatering agent itself does not generally play coagulation, and the pH value that is to regulate mud is supplied with the bone of mud with the vesicular graticule mesh, changes the mud granule structure, destroys colloidal stability, improves the coagulation effect of coagulating agent, strengthens flco intensity.The more important thing is, can reduce the dense degree of sludge filtration mud cake, reduce the filtration resistance of mud cake.Therefore, the characteristics of coagulant aids should be that compressibility is low, water-absorbent is weak, moderate than lightweight, granularity, evenly spread in the mud easily.
In sludge dewatering, show through the inventor's big quantity research and test-results, judge the quality of auxiliary agent from the result, mainly see the specific impedance value that drops into mud behind the auxiliary agent and the solid content of dehydrated sludge filter cake.
Sludge filtration specific impedance value is the composite target of expression sludge filtration characteristic, and its physical significance is: when the mud of unit mass filters under certain pressure, and the resistance on the unit filtration area.
The specific impedance value is low more, shows that dewatering performance of sludge is good more; The solid content of dehydrated sludge filter cake is high more, shows that dehydrating effect is good more.Because filtering final purpose will be seen moisture content of the cake, so the solid content of filter cake is to estimate auxiliary agent to be used for a crucial factor of sludge dewatering effect.
Existing auxiliary agent mainly contains diatomite, wood chip, flyash, lime etc.
Use the auxiliary agent of diatomite as sludge dewatering, its shortcoming is diatomaceous too expensive, and the dehydration cost is too high.
Use the auxiliary agent of wood chip as sludge dewatering, its shortcoming is that wood chip is closely knit, still keep the particulate state of raw material when stirring, and has reduced the bone effect with the vesicular graticule mesh of supply mud that auxiliary agent should have.Also have,, when utilizing mud to produce biological organic fertilizer, can prolong the fermentation time of mud greatly because wood chip does not have not by fermentation.
Use the auxiliary agent of flyash as sludge dewatering, its shortcoming is because fly ash grain is very tiny, influences dewatering speed.When adding auxiliary agent, must be earlier that the sewage sludge modulation is similar neutral, flyash is alkalescence, influences the pH value.
Use the auxiliary agent of lime as sludge dewatering, shortcoming is that sewage sludge solid increases after adding lime, is unfavorable for further handling and utilizing.And Ca (OH)
2Can decompose heat dissipation, the filter cake calorific value is reduced, be unfavorable for burning disposal.Lime also can make mud disengage a large amount of ammonia, has a strong impact on environment.Therefore, be extensive use of under the situation of high-molecular coagulant adopting at present, do not advocating and use lime as auxiliary agent.
Add wood chip or diatomite auxiliary agent, though the specific impedance value is low, the solid content of filter cake is also very low.Add the flyash auxiliary agent, though the solid content of filter cake has improved, the specific impedance value of mud also increases greatly.
Existing dewatering, injection pressure is taked the mode of operation of constant voltage during dehydration.During filtration, leach liquid volume and be directly proportional with filter pressure, take the mode of operation of constant voltage, mud cake forms rapidly, and its dense degree also increases sharply, and filter cake just is in very dense state when just forming.Therefore the mode of operation of constant voltage has strengthened filtration resistance, and filtration resistance has been offset filter pressure, and strainability is also reduced rapidly, and the final dewatering effect is generally about 70%.
Summary of the invention
First purpose of the present invention provides a kind ofly can reduce mud specific impedance value, improve the solid content of dehydration back filter cake and the auxiliary agent of dewatering.
The dense degree of mud cake evenly increased when second purpose of the present invention provided a kind of the filtration, rather than just was in very dense state when filter cake just forms, reduces filtration resistance, improves the mud dewatering method of strainability.
A kind of auxiliary agent that is used for sludge dewatering is the substratum after the edible mushroom harvesting, and the weight percent of its usage quantity is that mud contains 5%-10% of thing admittedly.Substratum after edible mushroom is plucked, through fermentation is rotten for a long time, except robust fibre, all the other nutritive substance overwhelming majority mushroom that is eaten absorbs, and compressibility is low, water-absorbent is weak, than lightweight, easily disperse when particularly stirring, and supply mud is with the bone of vesicular graticule mesh, change the mud granule structure, destruction colloidal stability, the coagulation effect of raising coagulating agent strengthens flco intensity.After using the auxiliary agent of above-mentioned content, the specific impedance value is 4 * 10
8About cm/g, near minimum, the solid content of dehydration back filter cake is greater than more than 0.223, near the highest.Use above-mentioned auxiliary agent, also help the use producing organic fertilizer from sludge, can shorten the fermentation time of biological organic fertilizer greatly.
As improvement, the edible mushroom substratum makes the granularity of auxiliary agent moderate, easier evenly spreading in the mud for being crushed to the particle of 3-10mm length.
As improvement, the weight percent of the usage quantity of edible mushroom substratum be mud contain thing admittedly 8%, the specific impedance value is approximately 3.767 * 10
8Cm/g reaches minimum, and the solid content of filter cake is approximately 0.2245, and dehydrating effect reaches optimum regime.
A kind of method of using the sludge dewatering of above-mentioned auxiliary agent:
1) adding the auxiliary agent churning time is 6-10 minutes;
2) use the plate-and-frame filter press filter-press dehydration, the laddering increase of mud injection pressure when the sewage sludge that modulation is soon finished injects pressure filter necessarily to advance mud pressure, is filtered beginning, and filtrate discharge is promptly arranged at this moment, and when filling with, the filtrate delivery flow is V
1Along with filtration time increases, the filtrate delivery flow reduces gradually, when the filtrate delivery flow is lower than 1/2 V
1The time, the mud injection pressure is improved a class, this moment, the filtrate delivery flow can increase to V
2Work as the filtrate delivery flow again and be lower than 1/2 V
2The time, again the mud injection pressure is improved a class, be incremented to setting pressure in this way, stop charging and pressurize when being incremented to setting pressure, and then the barrier film extruding.
Filter fundamental equation according to toll bar, during filtration, leach liquid volume and be directly proportional with filter pressure, still along with the increase of pressure, mud cake forms rapidly, and its dense degree also constantly increases.Mud cake is thickeied layer by layer in filter chamber and is formed, and injection pressure takes to increase progressively the mode of operation of exerting pressure, and the dense degree of mud cake evenly increases, rather than just is in very dense state when filter cake just forms, and reduces filtration resistance, improves strainability.
Improvement as mud dewatering method, advancing mud pressure is 0.2MPa, class of the every raising of filter pressure improves 0.2MPa, stop charging and pressurize 10 minutes when rising to 1.6MPa step by step, carry out barrier film extruding 20 minutes with 2.5MPa pressure again, can further reduce the water ratio of handling back mud, efficient is also high.
As the another improvement of mud dewatering method, in the sludge dewatering, the filter plate of plate-and-frame filter press is that 15% polypropylene glass composite reinforcing material once shaped forms; Tow sides at filter plate are provided with filter chamber, are densely covered with protruding particle in the bottom surface of filter chamber, and protruding particle is along the outside shape radiation uniform distribution in the shape of a spiral of filter plate central through hole.
Filter plate selects for use the composite reinforcing material once shaped of 15% polypropylene glass to make, and filter plate rigidity and toughness are all better, can reach hard and soft balance, satisfy the demand of production status.
Mud injects pressure filter with rotation mode under the effect of high-pressure pump, the projection particle injects outwards shape radiation profiles in the shape of a spiral of through hole along pressure filter mud, the mud that enters filter chamber can be flowed along the spirrillum " passage " of protruding micelle, reduced the resistance of protruding micelle, increased and injected the flowability of mud in filter chamber, thereby more effectively guaranteed the homogeneity of mud in filter plate.
As the improvement of mud dewatering method, in the sludge dewatering, radially be provided with the diversion trench that mud is imported the filter plate filter chamber on the end face of the mud divider of plate-and-frame filter press; Diversion trench is a spirrillum.
Mud injects pressure filter with rotation mode under the effect of high-pressure pump, the mud that rotation mode injects pushes the filter plate filter chamber by spiral helicine diversion trench with mud, can not change the direction of motion that mud injects, both improved the speed of mud injection filter plate, also improved the homogeneity of mud injection filtering board, realized that the filter cake thickness is even, the equally distributed purpose of filter cake moisture content.
As the improvement of mud dewatering method, in the sludge dewatering, the filter cloth of plate-and-frame filter press adopts the polypropylene fiber satin of single thread to knit and forms, and the cross-sectional shape side of being of polypropylene fiber is trapezoidal; The filter opening of side's trapezoid cross section fibrage filter cloth is a tapered hole, and the aperture that goes out filtrate one side is 0.058mm, and the aperture of advancing filtrate one side is 0.106mm, and the specification that filter cloth advances filtrate one side is equivalent to 150 orders.
Adopt polypropylene fibre/satin to knit/filter cloth of single thread/150 order specifications, its strainability and polypropylene fibre/satin knit/single thread knits with polyamide fibre/satin/strainability of single thread is basic identical, than terylene/satin knit/single excellent in detail, and 150 orders and 300 order difference are little, strainability reduction during 500 orders.Because polypropylene fibre is more cheap than polyamide fibre, 150 orders are more cheap than 300 orders again, so, adopt polypropylene fibre/satin to knit/filter cloth of single thread/150 order specifications good filtration effect, low price.
Utilize the trapezoidal interface of fiber, knit out the fine filter opening of taper, the filter opening import is big, it is young to go out, and makes the mud filtrate of penetrating from filter opening produce the la farr pipe effect.When mud filtrate after entering filter opening under the certain pressure, filtrate is compressed back pressure by the taper filter opening and increases, the filtrate flow velocity is accelerated, and the effect of from aperture " ejaculation " is arranged.This effect has significantly reduced the latch up phenomenon of filter opening, has increased the hydrophobicity of filter cloth, has improved the filter effect of mud greatly.
Description of drawings
Fig. 1 is the perspective exploded view of the filter-pressing device of plate-and-frame filter press of the present invention.
Fig. 2 is that the master of plate-and-frame filter press filter cloth of the present invention looks synoptic diagram.
Fig. 3 is the diagrammatic cross-section of Fig. 2 along the A-A position.
Fig. 4 is that the master of the mud divider of plate-and-frame filter press of the present invention looks synoptic diagram.
Fig. 5 is the schematic perspective view of the filter plate of plate-and-frame filter press of the present invention.
Fig. 6 is that the master of the filter plate of plate-and-frame filter press of the present invention looks synoptic diagram.
Fig. 7 is that Fig. 6 shows synoptic diagram along cuing open of B-B position.
Embodiment
A kind of auxiliary agent that is used for sludge dewatering is the substratum after edible mushroom is plucked, and the substratum after edible mushroom is plucked is for being crushed to the particle of 3-10mm length, the weight percent of edible mushroom substratum usage quantity be mud contain thing admittedly 8%.
A kind of method of using the sludge dewatering of tensio-active agent may further comprise the steps:
1) sewage sludge pre-treatment: get the water ratio weight ratio and be 80.4% sewage sludge, adding water, to be modulated to the water ratio weight ratio be 93%, gets water ratio weight ratio after the pre-treatment and be 1000 kilograms of 93% sewage sludges.
2) add tensio-active agent: add 1.38 kilograms dodecyl benzyl dimethyl ammonium chloride, stirring reaction 10 minutes.
3) add flocculation agent: add 6.59 kilograms of polymerize aluminum chlorides earlier, 32.0 rev/mins were stirred 2 minutes soon, and 10.0 rev/mins were stirred 3 minutes slowly; Add lime powder, the pH value of sewage sludge is transferred to 7; Add 0.35 kilogram of polyacrylamide again, 32.0 rev/mins were stirred 3 minutes soon, and 10.0 rev/mins were stirred 7 minutes slowly.
4) add auxiliary agent: add the substratum after 5.6 kilograms of edible mushroom are plucked, fully stirred 8 minutes.
5) sludge dewatering: use the plate-and-frame filter press filter-press dehydration; In the sludge dewatering process, the laddering increase of mud injection pressure is about to sewage sludge that modulation finishes when injecting pressure filter with the pressure of 0.2MPa, filters beginning, and promptly have filtrate discharge this moment, and when filling with, the filtrate delivery flow is V
1Along with filtration time increases, the filtrate delivery flow reduces gradually, when the filtrate delivery flow is lower than 1/2 V
1The time, filter pressure is improved 0.2MPa, this moment, the filtrate delivery flow can increase to V
2Work as the filtrate delivery flow again and be lower than 1/2 V
2The time, again filter pressure is improved 0.2MPa, stop charging and pressurize 10 minutes when rising to 1.6MPa step by step, carry out barrier film extruding 20 minutes with 2.5MPa pressure again.
6) release blowing.
Below be the structure of the filter cloth of plate-and-frame filter press in the sludge dewatering, mud divider, filter plate.
As shown in Figure 1, a kind of filter-pressing device of plate-and-frame filter press comprises filter plate 5, filter cloth 1 and mud divider 6.
As Fig. 2, shown in Figure 3, on filter cloth, be densely covered with filter opening 2, be provided with first through hole 3 that injects mud in the central position of filter cloth 1,4 sides of being, fibre section of braiding filter cloth are trapezoidal; Utilize the square trapezoid cross section fiber warp and woof of the single thread filter opening that weaves filter cloth that interweaves to be square tapered hole.The filter cloth specification is that polypropylene fibre/satin is knitted/single thread/150 orders, and the aperture that filter cloth goes out filtrate one side is 0.058mm, and the aperture of advancing filtrate one side is 0.106mm.
As Fig. 1, shown in Figure 4, be provided with second through hole 7 that injects mud in the central position of mud divider 6, on an end face of mud divider, radially be provided with the diversion trench 8 that mud is imported the filter plate filter chamber from second through hole 7; Two sidewalls 9 of the diversion trench on the mud divider are spirrillum.
To shown in Figure 7, filter plate 5 is that 15% polypropylene glass composite reinforcing material once shaped forms as Fig. 1, Fig. 5.Be provided with the filter chamber 10 of ccontaining mud at the tow sides of filter plate 5, be densely covered with protruding particle 11, be provided with the third through-hole 12 that injects mud in the central position of filter chamber 10 in the bottom surface of filter chamber 10.The third through-hole 12 that protruding particle 11 on filter chamber 10 bottom surfaces injects along pressure filter mud is shape radiation uniform distribution in the shape of a spiral outwards.Four angle positions at the periphery filter plate 5 of filter chamber 10 are respectively equipped with the outflow through hole 13 that flows out filtrate, flow out through hole 13 and 10 of filter chambers are provided with three communicating apertures 14 that the filtrate introducing of filter chamber 10 flowed out through hole 13 at each.Also evenly be provided with four pillar stiffeners 15 that flush with filter plate 5 pros and cons in the bottom surface of filter chamber 10.On filter plate, also be provided with the cavity 19 that is used for the barrier film extruding.
As shown in Figure 1, filter cloth 1 covers on the filter chamber 10, and the little side in the aperture of filter opening 2 is towards filter plate 5, and filter cloth 1 places 5 of mud divider 6 and filter plates.Mud divider 6 is installed in the central position of filter plate tow sides filter chamber 10 bottom surfaces respectively by studs 17 and nut 16,18.The third through-hole 12 of second through hole 7 of mud divider 6, first through hole 3 on the filter cloth 1 and filter plate 5 is communicated with.
Moisture percentage in sewage sludge weight ratio after the dehydration is 49.2%.
A kind of auxiliary agent that is used for sludge dewatering is the substratum after edible mushroom is plucked, and the substratum after edible mushroom is plucked is for being crushed to the particle of 3-10mm length, the weight percent of edible mushroom substratum usage quantity be mud contain thing admittedly 5%.
A kind of method that makes the sludge dewatering of used additives, step 5 " interpolation auxiliary agent " fully stirred 6 minutes for adding the substratum after 3.5 kilograms of edible mushroom are plucked as different from Example 1
Moisture percentage in sewage sludge weight ratio after the dehydration is 52.5%.
A kind of auxiliary agent that is used for sludge dewatering is the substratum after edible mushroom is plucked, and the substratum after edible mushroom is plucked is for being crushed to the particle of 3-10mm length, the weight percent of edible mushroom substratum usage quantity be mud contain thing admittedly 6%.
A kind of method that makes the sludge dewatering of used additives, step 5 " interpolation auxiliary agent " fully stirred 7 minutes for adding the substratum after 4.2 kilograms of edible mushroom are plucked as different from Example 1
Moisture percentage in sewage sludge weight ratio after the dehydration is 51.1%.
Embodiment 4
A kind of auxiliary agent that is used for sludge dewatering is the substratum after edible mushroom is plucked, and the substratum after edible mushroom is plucked is for being crushed to the particle of 3-10mm length, the weight percent of edible mushroom substratum usage quantity be mud contain thing admittedly 9%.
A kind of method that makes the sludge dewatering of used additives, step 5 " interpolation auxiliary agent " fully stirred 9 minutes for adding the substratum after 6.3 kilograms of edible mushroom are plucked as different from Example 1
Moisture percentage in sewage sludge weight ratio after the dehydration is 51.6%.
A kind of auxiliary agent that is used for sludge dewatering is the substratum after edible mushroom is plucked, and the substratum after edible mushroom is plucked is for being crushed to the particle of 3-10mm length, the weight percent of edible mushroom substratum usage quantity be mud contain thing admittedly 10%.
A kind of method that makes the sludge dewatering of used additives, step 5 " interpolation auxiliary agent " fully stirred 10 minutes for adding the substratum after 7 kilograms of edible mushroom are plucked as different from Example 1
Moisture percentage in sewage sludge weight ratio after the dehydration is 51.9%.
Testing data
Test about sludge dewatering research all adopts following supporting test set and instrument to finish the mensuration of specific impedance:
A: one of determinator of specific impedance value is made up of vacuum pump, voltage stabilizing bottle, pressure warning unit, Gooch funnel, band scale Erlenmeyer flask, plug, valve, Glass tubing etc.More than device is normal experiment vessel and equipment.
B: (model is 101-3A) to two loft drier of being produced by Changzhou Nuo Ji Instr Ltd. of the determinator of specific impedance value.
C: the three falling ball method coefficient of viscosity determinators by the production of Wuxi City high honour electronic machine Manufacturing Co., Ltd of the determinator of specific impedance value (model RVM-B).
Except that specifying, all adopt the method for constant pressure filtration test mud specific impedance value to carry out.All test pressures are got vacuum tightness 380 mercury column (P=500g/cm
2), filtration area is 78.54cm
2(the funnel back cut diameter=10cm), filtration medium adopts 150 purpose filter clothes, and the aperture is 0.106mm, stirs 10 minutes, is about 80% with the water ratio weight percent of sewage sludge, and it is diluted to 93%.All testing datas are the mean values through testing more than 20 times all.
The specific impedance value ask method:
In the formula:
When the mud of r '---unit mass filters under certain pressure, the resistance on the unit filtration area; (cm/g)
P: impellent, the pressure drop during filtration, (g/cm
2);
A: filtration area, (cm
2);
B: slope, (s/cm
6);
μ: filtrate viscosity, [(g/cm
2) s)];
C: filter residue dry weight C is defined as and filters the dried solid masses of filter cake that the long-pending filtrate of monomer is retained down, (g/cm on filtration medium
3).
Level pressure with decide under the situation of filtration area, need only and to obtain b, C and μ by experiment, promptly can try to achieve specific impedance value r by following formula.
The character of primary sludge
Test is at first carried out skip test to the mud of various character, does not throw in any additives during filtration, records the ratio resistance pH value list 1 of various mud.
This testing data prompting, before sewage sludge not being regulated, the mud specific impedance is very high, all surpasses 1.0 * 10
9Cm/g belongs to the difficult mud that dewaters.Especially sanitary sewage mud, specific impedance reaches 2.47 * 10
9Cm/g is to be difficult to dehydration without conditioning.
Throw in the filter effect of the auxiliary agent of different varieties
In this test, chosen different auxiliary agents, ZN-1 is a sawdust, and ZN-3 is a flyash, and ZN-4 is a diatomite, and LY-2 is the substratum after edible mushroom is plucked, injected volume be mud contain thing admittedly 8%.Its typical test data such as table 2.
Table 2 is thrown in the filter effect of the auxiliary agent of different varieties
| Project | ZN-1 | LY-2 | ZN-3 | ZN-4 |
| Solid content G before filtering 0 | 0.06891 | 0.06891 | 0.06891 | 0.06891 |
| Filter cake solid content G 1 | 0.1832 | 0.2318 | 0.2246 | 0.1883 |
| Filter residue dry weight C (g/cm 3) | 0.1104 | 0.0980 | 0.0994 | 0.1086 |
| Slope b (s/cm 6) | 0.1252 | 0.113 | 0.133 | 0.125 |
| Viscosity, mu (sg/cm 2) | 0.0109 | 0.011 | 0.0108 | 0.011 |
| (* 10 for specific impedance value r (cm/g) 8) | 6.414 | 6.462 | 7.641 | 6.449 |
Test-results shows that the dewatering performance of sludge of LY-2 is best.
The inventor has also selected different injected volumes and different tests condition to carry out above-mentioned test, and it is best that test-results is the dewatering performance of sludge of LY-2 auxiliary agent.About its testing data, the inventor lists no longer one by one.
The filter effect of the different injected volumes of auxiliary agent LY-2
According to various data and experience, we have set from 4% to 11% totally 8 injected volume class for auxiliary agent LY-2.Its typical test data such as table 3.
The filter effect of the different injected volumes of table 3 auxiliary agent LY-2
| Injected volume (%) | 45 | 6 | 7 | 8 | 9 | 10 | 11 |
| Solid content G before filtering 0 | 0.08650.0865 | 0.0865 | 0.0865 | 0.0865 | 0.0865 | 0.0865 | 0.0865 |
| Filter cake solid content G 1 | 0.16860.1848 | 0.2015 | 0.2396 | 0.2245 | 0.2238 | 0.2279 | 0.2263 |
| Filter residue dry weight C (g/cm 3) | 0.16350.1626 | 0.1516 | 0.1354 | 0.1407 | 0.1410 | 0.1394 | 0.1377 |
| Slope b (s/cm 6) | 0.19530.1832 | 0.1647 | 0.1239 | 0.0928 | 0.1021 | 0.1009 | 0.1007 |
| Viscosity, mu (sg/cm 2) | 0.01080.0108 | 0.0108 | 0.0108 | 0.0108 | 0.0108 | 0.0108 | 0.0108 |
| (* 10 for specific impedance value r (cm/g) 8) | 6.8226.435 | 6.207 | 5.228 | 3.767 | 4.136 | 4.134 | 4.177 |
The inventor serves as to carry out at interval repetition test with 0.1% between 5% to 8%.The results showed, when the weight ratio of LY-2 be mud contain admittedly thing 8% the time, mud specific impedance value minimum, the mud solid content is the highest, dewatering is best.
The results showed, when the weight ratio of LY-2 less than mud contain admittedly thing 5% the time, along with the minimizing of injected volume, mud specific impedance value sharply increases, the solid content of mud also has and reduces; When the weight ratio of polyacrylamide was 8%, it is minimum that mud specific impedance value reaches, and along with the increase of injected volume, mud specific impedance value increases on the contrary; Injected volume was at 10% o'clock, and the mud solid content is for reaching maximum, and along with the increase of injected volume, the mud solid content reduces on the contrary.Angle with cost performance considers that the input amount of LY-2 is the 5%-10% that mud contains thing admittedly.
The inventor has selected different test conditionss for the LY-2 auxiliary agent, and its test-results is the same.About its testing data, the inventor lists no longer one by one.
Below all test conditionss be for mud equipressure (500g/cm of the same race
2), etc. filtration area (78.54cm
2), etc. water ratio such as primary sludge amount (50ml), primary sludge, etc. the flocculation dosage, etc. agitation condition, etc. filtration time (30 minutes), judge which is superior with the filtrate volume that respectively leaches.Obviously it is many more to leach filtrate, and its strainability is just winning more.Except specifying.
The yarn type and the weaving structure of filter cloth have a significant impact strainability.The yarn type of filter cloth is divided into three kinds of staple fiberss, multiple thread, single thread basically, and various yarn types are to the influence such as the table 4 of strainability.
The various yarn types of table 4 are to the influence of strainability
| The yarn type | To particulate every the filter performance | Filter productive rate | Cake moisture | Discharging | Life-span | Stop up | Sealing property |
| Staple fibers | Best | Take second place again | Take second place again | Take second place again | The longest | Take second place again | Best |
| Multiple | Take second place | Take second place | Take second place | Take second place | Take second place | Take second place | Take second place again |
| Single | Take second place again | Best | Minimum | The easiest | Take second place again | Be difficult for | Take second place |
The weaving structure of filter cloth is divided into three kinds in plain weave, twill and satin weave basically, and the relation of various weaving structures and filter operation sees Table 5.
The relation of table 5 weaving structure and filter operation
| Weaving structure | To particulate every the filter performance | Filter productive rate | Cake moisture | Discharging | Life-span | Stop up |
| Plain weave | Best | Take second place again | Take second place again | Take second place again | Take second place | Take second place again |
| Twill | Take second place | Take second place | Take second place | Take second place | The longest | Take second place |
| Satin weave | Take second place again | The easiest | Minimum | The easiest | Take second place again | Be difficult for |
We with polyamide fibre/satin knit/single thread, terylene/satin knit/single thread, polypropylene fibre/satin knit/three kinds of filter clothes of single thread, and respectively by 150 orders (filter cloth aperture 0.106mm), 300 orders (filter cloth aperture 0.048mm), 500 orders (filter cloth aperture 0.025mm) ooze hole density totally 9 kinds of situations test.Test method is to measure these filter clothes leach filtrate under complete condition of equivalent volume.
Following filtrate volume divides 9 class, and from 1 to 9 filtrate volume is by increasing, and it is minimum that 1 expression leaches filtrate volume, and it is maximum that 9 expressions leach filtrate volume.Testing data sees Table 6.
Leach the filtrate volume contrast under the conditions such as the different filter clothes of table 6
| The filter cloth type | Sanitary sewage mud | Dyeing waste water sludge | Paper waste mud | Electroplating wastewater mud |
| Polyamide fibre/satin is knitted/single thread/150 orders | 4 | 6 | At most | 6 |
| Terylene/satin is knitted/single thread/150 |
2 | 5 | 8 | 5 |
| Polypropylene fibre/satin is knitted/single thread/150 orders | 4 | 6 | 9 | 6 | |
| Polyamide fibre/satin is knitted/single thread/300 orders | 4 | 6 | 9 | 6 | |
| Terylene/satin is knitted/single thread 300 |
2 | 5 | 7 | 5 | |
| Polypropylene fibre/satin is knitted/single thread/300 orders | 4 | 6 | 9 | 6 | |
| Polyamide fibre/satin is knitted/single thread/500 |
2 | 4 | 7 | 4 | |
| Terylene/satin is knitted/single thread/500 | Minimum | 3 | 5 | 3 | |
| Polypropylene fibre/satin is knitted/single thread/500 |
2 | 4 | 7 | 4 |
From the testing data of table 6 as can be seen, polypropylene fibre/satin knits/single thread knits with polyamide fibre/satin/strainability of single thread is basic identical, than terylene/satin knit/single thread is excellent, and 150 orders and 300 order difference are little, strainability reduction during 500 orders.Because polypropylene fibre is more cheap than polyamide fibre, 150 orders are more cheap than 300 orders again, so, can determine tentatively that filter cloth adopts polypropylene fibre/satin to knit/single thread/150 order specifications.
The improvement of plate-and-frame filter press mud mud inlet off-set facility
Use common plate-and-frame filter press, the water ratio of mud cake is about 65%, and it is solid-state that mud cake has been, and shape is complete.For analyzing the influence of press filtration pressure to filter plate, we have carried out following test:
Test method: the dehydrated sludge cake behind the sludge press filtration is divided into nine positions by nine palace lattice, as table 7.
Table 7
| Upper left | On | Upper right |
| A left side | Right | |
| The lower-left | Down | The bottom right |
Respectively eight positions sampling of mud cake is detected the water ratio (middle layout be into mud pore) of mud cakes.Row 10 test-results such as tables 8:
Each position water ratio (unit weight per-cent: %) of the common sheet frame cachaza of table 8
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| On | 67.5 | 65.5 | 75.3 | 71.1 | 65.9 | 72.3 | 62.2 | 75.4 | 70.3 | 77.2 |
| Down | 68.3 | 68.5 | 70.7 | 73.9 | 73.8 | 64.0 | 73.7 | 68.0 | 67.8 | 63.7 |
| A left side | 78.3 | 67.9 | 78.2 | 66.1 | 70.1 | 68.9 | 67.1 | 77.2 | 66.0 | 65.9 |
| Right | 62.5 | 66.3 | 77.9 | 73.6 | 78.2 | 67.4 | 69.4 | 73.8 | 76.3 | 69.9 |
| Upper left | 79.7 | 62.0 | 73.3 | 64.2 | 69.7 | 74.2 | 74.6 | 79.7 | 76.0 | 64.1 |
| The lower-left | 78.3 | 73.8 | 69.2 | 72.8 | 74.5 | 66.2 | 70.5 | 74.1 | 76.9 | 63.7 |
| Upper right | 72.7 | 78.9 | 62.0 | 74.3 | 78.7 | 78.1 | 66.6 | 77.6 | 65.6 | 64.9 |
| The bottom right | 69.4 | 67.5 | 69.6 | 69.4 | 73.8 | 69.6 | 75.2 | 76.9 | 76.0 | 62.3 |
| Average | 72.1 | 68.8 | 72.0 | 70.7 | 73.1 | 70.1 | 69.9 | 75.3 | 71.9 | 66.5 |
Can get from last table analysis: each position water ratio of common sheet frame cachaza is extremely inhomogeneous, and irregular.Moisture is low, is low to moderate 62.3%, and is high, up to 79.7%.The inhomogeneous filter plate discontinuity that causes of water ratio.Originally, the two sides of filter plate is stressed when even, what be subjected to only is vertical positive pressure, a lot of materials can both be born, but when moisture content of the cake is inhomogeneous, what filter plate bore is the shearing force that acts on different sites, and this is destructive, produces the major cause of " plate bursting " phenomenon when this also is high pressure.Moisture content of the cake inhomogeneous, because mud skewness in the filter plate filter chamber causes, mud many positions that distributes, moisture content of the cake is low, and the pressure that filter plate bears is big.The position that the mud distribution is few, the pressure that moisture content of the cake height, filter plate bear is little.Hence one can see that, improve the operating pressure of filter press, must solve the uniform distribution problem of mud in the filter plate filter chamber.
It is the filter cloth of trapezoidal hole along filter plate, the filter opening that the centre hole spiral distributes that plate-and-frame filter press has adopted the protruding particle of mud screw-dispenser, filter chamber bottom.Testing data such as table 9
Table 9 has been improved each position water ratio (the unit weight per-cent: %) of filter cake behind the sludge press filtration device
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| On | 62.3 | 66.4 | 64.2 | 67.1 | 63.0 | 67.2 | 65.1 | 67.8 | 64.6 | 67.9 |
| Down | 62.0 | 62.0 | 62.4 | 65.5 | 64.9 | 66.6 | 63.2 | 67.8 | 65.7 | 66.6 |
| A left side | 66.7 | 67.6 | 65.6 | 67.1 | 62.8 | 62.6 | 67.7 | 62.7 | 65.2 | 64.3 |
| Right | 65.5 | 64.5 | 62.0 | 63.8 | 67.6 | 66.8 | 63.1 | 67.3 | 62.3 | 67.7 |
| Upper left | 63.0 | 65.6 | 62.7 | 62.3 | 66.9 | 62.8 | 66.6 | 65.8 | 62.5 | 65.4 |
| The lower-left | 65.9 | 64.0 | 67.3 | 62.2 | 62.3 | 63.5 | 67.3 | 63.4 | 66.5 | 65.0 |
| Upper right | 65.4 | 67.3 | 64.2 | 66.7 | 65.2 | 67.6 | 66.8 | 62.0 | 62.9 | 62.6 |
| The bottom right | 63.9 | 67.6 | 63.5 | 62.2 | 65.5 | 64.5 | 64.0 | 65.1 | 62.8 | 66.9 |
| Average | 64.3 | 65.6 | 64.0 | 64.6 | 64.8 | 65.2 | 65.5 | 65.2 | 64.1 | 65.8 |
Data show, improved mud injection device and filter plate after, the uniformity coefficient of each position water ratio of sludge press filtration mud cake improves greatly, the average moisture content of mud cake has also dropped to about 65% by about 70%, the sludge press filtration dewatering efficiency has improved 5 percentage points.
Different filter pressures apply the filter effect of mode
We select the TEFSA-PEH type pressure filter of Spain's import, have designed six kinds of filter pressures and have applied mode and test.
Get weight in wet base than the urban domestic sewage sludge that is 80%, add water and be modulated to 90%.Additive is that weight ratio is 1.5% the dodecyl benzyl dimethyl ammonium chloride tensio-active agent that mud contains thing admittedly; The addition weight ratio is 8% polyacrylamide and the flocculant of polymeric aluminium chloride that mud contains thing admittedly, and the weight ratio of polyacrylamide is 5% of a flocculation agent; The addition weight ratio is the substratum auxiliary agent after edible mushroom that mud contains thing 8% is admittedly plucked.
When adding flocculation agent, first polyaddition aluminum chloride, 32.0 rev/mins were stirred 2 minutes soon, and 10.0 rev/mins were stirred 3 minutes slowly, and transferring the pH value of sewage sludge is 6～8; Add polyacrylamide again, 32.0 rev/mins were stirred 3 minutes soon, and 10.0 rev/mins were stirred 7 minutes slowly.
It is the filter cloth of trapezoidal hole along filter plate, the filter opening that the centre hole spiral distributes that plate-and-frame filter press has adopted the protruding particle of mud screw-dispenser, filter chamber bottom.
Mode (1) constant pressure type:, filter with the pressurize of 1.2MPa pressure with the charging of 0.4MPa pressure;
Mode (2) constant pressure type:, filter with the pressurize of 1.35MPa pressure with the charging of 0.4MPa pressure;
Mode (3) constant pressure type:, filter with the pressurize of 1.5MPa pressure with the charging of 0.4MPa pressure;
Mode (4) is laddering: after the charging of 0.4MPa pressure, be the interval with 0.1MPa pressure, rise to 1.6MPa step by step;
Mode (5) is laddering: with the charging of 0.2MPa pressure, be the interval with 0.2MPa pressure, rise to the 1.6MPa pressurize step by step;
Mode (6) is laddering: after the charging of 0.4MPa pressure, be the interval with 0.3MPa pressure, progressively rise to 1.6MPa;
This test is directly with the water ratio that the filters mud cake judgment criteria as strainability, test-results such as table 10.
The different filter pressures of table 10 apply the filter effect of mode
| Pressure applies | Mode | 1 | |
|
Mode 4 | |
|
| Moisture content of the cake (%) | 59.9 | 58.8 | 57.8 | 54.2 | 54.3 | 55.3 |
| Pressure when filtration is finished (Bar) | - | - | - | 12 | 12 | 13 |
| Filter operation (h) consuming time | 3.7 | 3.5 | 3.4 | 3.5 | 3 | 3.2 |
Test-results shows that it is minimum with mode 4 moisture content of the cake that filter pressure applies mode, wants 3.5 hours but filter operation is consuming time, and the time spent is longer; Though the filtration moisture content of the cake of mode 5 takes second place, also in 55%, the time spent is minimum.Optimize angle from each side such as enterprise costs and consider, it is best in mode 5 that filter pressure applies mode.Laddering filter pressure applies mode, can make the unlikely increase rapidly of resistance of mud cake, so filter effect can be better.
The inventor has adopted different proportionings to additive, and it is best that its test-results is mode 5.
The filter opening of filter cloth also can be round taper hole or other tapered hole among the present invention.
Claims (8)
1. auxiliary agent that is used for sludge dewatering is characterized in that: described auxiliary agent is the substratum after edible mushroom is plucked, and the weight percent of its usage quantity is that mud contains 5%-10% of thing admittedly.
2. a kind of auxiliary agent that is used for sludge dewatering as claimed in claim 1 is characterized in that described edible mushroom substratum is for being crushed to the particle of 3-10mm length.
3. a kind of auxiliary agent that is used for sludge dewatering as claimed in claim 1 is characterized in that: the weight percent of the usage quantity of described edible mushroom substratum be mud contain thing admittedly 8%.
4. use such as claim 1 to 3 method of the sludge dewatering of a described auxiliary agent arbitrarily is characterized in that:
1) churning time of interpolation auxiliary agent is 6-10 minutes;
2) use the plate-and-frame filter press filter-press dehydration, the laddering increase of mud injection pressure when soon pretreated sewage sludge injects pressure filter necessarily to advance mud pressure, is filtered beginning, and the filtrate discharge is promptly arranged this moment, and when filling with, the filtrate delivery flow is V
1Along with filtration time increases, the filtrate delivery flow reduces gradually, when the filtrate delivery flow is lower than 1/2V
1The time, the mud injection pressure is improved a class, this moment, the filtrate delivery flow can increase to V
2Work as the filtrate delivery flow again and be lower than 1/2V
2The time, again the mud injection pressure is improved a class, be incremented to setting pressure in this way, stop charging and pressurize when being incremented to setting pressure, and then the barrier film extruding.
5. the method for a kind of sludge dewatering as claimed in claim 4, it is characterized in that: advancing mud pressure is 0.2MPa, class of the every raising of filter pressure improves 0.2MPa, stops charging and pressurize 10 minutes when rising to 1.6MPa step by step, carries out barrier film extruding 20 minutes with 2.5MPa pressure again.
6. the method for a kind of sludge dewatering according to claim 4 is characterized in that: in the sludge dewatering, the filter plate of plate-and-frame filter press is that 15% polypropylene glass composite reinforcing material once shaped forms; Tow sides at filter plate are provided with filter chamber, are densely covered with protruding particle in the bottom surface of filter chamber, and protruding particle is along the outside shape radiation uniform distribution in the shape of a spiral of filter plate central through hole.
7. the method for a kind of sludge dewatering according to claim 6 is characterized in that: in the sludge dewatering, radially be provided with the diversion trench that mud is imported the filter plate filter chamber on the end face of the mud divider of plate-and-frame filter press; Diversion trench is a spirrillum.
8. the method for a kind of sludge dewatering according to claim 7 is characterized in that: in the sludge dewatering, the filter cloth of plate-and-frame filter press adopts the polypropylene fiber satin of single thread to knit and forms, and the cross-sectional shape side of being of polypropylene fiber is trapezoidal; The filter opening of side's trapezoid cross section fibrage filter cloth is a tapered hole, and the aperture that goes out filtrate one side is 0.058mm, and the aperture of advancing filtrate one side is 0.106mm, and the specification that filter cloth advances filtrate one side is equivalent to 150 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101985378A CN101367598B (en) | 2008-09-17 | 2008-09-17 | Additive for sludge dewatering and sludge dewatering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101985378A CN101367598B (en) | 2008-09-17 | 2008-09-17 | Additive for sludge dewatering and sludge dewatering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101367598A true CN101367598A (en) | 2009-02-18 |
| CN101367598B CN101367598B (en) | 2011-02-02 |
Family
ID=40411634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101985378A Expired - Fee Related CN101367598B (en) | 2008-09-17 | 2008-09-17 | Additive for sludge dewatering and sludge dewatering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101367598B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225258A (en) * | 2011-05-13 | 2011-10-26 | 黄建宏 | Dynamic balancing filter-pressing method |
| CN103011548A (en) * | 2012-12-27 | 2013-04-03 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Conditioner for combinedly conditioning sludge and method for dehydrating sludge through utilizing conditioner |
| CN104016560A (en) * | 2014-06-10 | 2014-09-03 | 无锡金园污泥处置新型燃料科技有限公司 | Novel sludge filter drying method |
| CN104445863A (en) * | 2014-12-31 | 2015-03-25 | 梁毅 | Method for achieving deep sludge dehydration and energy utilization on plate-and-frame filter press |
| CN106861260A (en) * | 2017-03-27 | 2017-06-20 | 上海城投污水处理有限公司 | Sheet frame enters mud distribution slot structure |
| CN107349650A (en) * | 2017-07-19 | 2017-11-17 | 上海诺辉工程科技发展有限公司 | Auto purification type screw extrusion filter and its application method |
| CN107982969A (en) * | 2017-12-27 | 2018-05-04 | 广西金邦泰科技有限公司 | A kind of filter press plate for filter press |
| CN115723399A (en) * | 2022-10-21 | 2023-03-03 | 河海大学 | Manufacturing method of silt blockage preventing pipe bag cloth for sludge dewatering and manufacturing method of pipe bag |
-
2008
- 2008-09-17 CN CN2008101985378A patent/CN101367598B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225258A (en) * | 2011-05-13 | 2011-10-26 | 黄建宏 | Dynamic balancing filter-pressing method |
| CN102225258B (en) * | 2011-05-13 | 2013-07-03 | 黄建宏 | Dynamic balancing filter-pressing method |
| CN103011548A (en) * | 2012-12-27 | 2013-04-03 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Conditioner for combinedly conditioning sludge and method for dehydrating sludge through utilizing conditioner |
| CN104016560A (en) * | 2014-06-10 | 2014-09-03 | 无锡金园污泥处置新型燃料科技有限公司 | Novel sludge filter drying method |
| CN104016560B (en) * | 2014-06-10 | 2016-02-17 | 无锡金园污泥处置新型燃料科技有限公司 | A kind of sludge press filtration drying method |
| CN104445863A (en) * | 2014-12-31 | 2015-03-25 | 梁毅 | Method for achieving deep sludge dehydration and energy utilization on plate-and-frame filter press |
| CN106861260A (en) * | 2017-03-27 | 2017-06-20 | 上海城投污水处理有限公司 | Sheet frame enters mud distribution slot structure |
| CN107349650A (en) * | 2017-07-19 | 2017-11-17 | 上海诺辉工程科技发展有限公司 | Auto purification type screw extrusion filter and its application method |
| CN107982969A (en) * | 2017-12-27 | 2018-05-04 | 广西金邦泰科技有限公司 | A kind of filter press plate for filter press |
| CN115723399A (en) * | 2022-10-21 | 2023-03-03 | 河海大学 | Manufacturing method of silt blockage preventing pipe bag cloth for sludge dewatering and manufacturing method of pipe bag |
| CN115723399B (en) * | 2022-10-21 | 2024-05-10 | 河海大学 | Manufacturing method of anti-clogging pipe bag cloth for sludge dewatering and manufacturing method of pipe bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101367598B (en) | 2011-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101367600B (en) | Additive for sludge dewatering and sludge dewatering method | |
| CN101367598B (en) | Additive for sludge dewatering and sludge dewatering method | |
| CN101367597B (en) | Sludge dewatering method | |
| CN101367599B (en) | Surfactant for sludge dewatering and sludge dewatering method | |
| CN201353446Y (en) | Filter cloth and filter press device of plate and frame filter press | |
| CN203382564U (en) | Integrated biological aerated filter of utilizing composite filter materials | |
| CN102145960B (en) | Device and method for denitrifying and dephosphorizing ecological protection multi-level filtration wall in water source area on rural land surface | |
| CN102060381A (en) | Biological filler bag and application thereof in sewage treatment | |
| CN103648990A (en) | System and method for treating waste | |
| CN106379989B (en) | Baffling type biofilm reactor | |
| CN104724898A (en) | Sludge pretreatment process | |
| CN101293768A (en) | Biological filter material and preparation method | |
| CN101928052B (en) | Stably-operating continuous flow micro electrolytic reaction system | |
| CN201296713Y (en) | Inner circulating biological aerated filter and retention pond combined treatment system | |
| CN204174059U (en) | A kind of fluting board sludge treatment device | |
| CN208345846U (en) | Turning spurt water device system | |
| CN109399886A (en) | A kind of belt press mud processing method | |
| CN103382098A (en) | Light biological carrier for water treatment, and preparation method and application of light biological carrier | |
| CN207659171U (en) | Flood biological aerated filter reaction system | |
| CN212740919U (en) | Novel high-permeability long-life glue filtering element | |
| CN208980372U (en) | A kind of adsorption and dephosphorization equipment and system suitable for rural domestic sewage treatment | |
| DE102006047328A1 (en) | Fermentation device for organic solids has filtration layer above drainage layer on floor of fermenter | |
| CN206828192U (en) | One kind drop streaming denitrogenation dephosphorizing expanded bed biofilter | |
| CN110272078B (en) | Preparation method of floc coated filler type percolation dam for pollution control convenient for landfill volume reduction | |
| CN109879578A (en) | A kind of dehydrating residual active sludge filter aid and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG LUYOU ENVIRONMENTAL PROTECTION EQUIPMENT Free format text: FORMER OWNER: GUANGZHOU LUYOU INDUSTRIAL WASTE RECYCLING CO., LTD. Effective date: 20140213 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 511466 GUANGZHOU, GUANGDONG PROVINCE TO: 511450 GUANGZHOU, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140213 Address after: 511450, No. three, No. 101, No. 5, East Village Road, East Village, Tai Lung Street, Fu Tung Road, Fu Yi Road, Guangzhou, Guangdong, Panyu District Patentee after: GUANGDONG LVYOU ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Address before: Nansha District Hengli Town, Guangzhou city of Guangdong province 511466 Hexing Road No. 56 Patentee before: Guangzhou Luyou Industrial Waste Recycling Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20090218 Assignee: Guangzhou Luyou Industrial Waste Recycling Co., Ltd. Assignor: GUANGDONG LVYOU ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Contract record no.: 2015440000144 Denomination of invention: Additive for sludge dewatering and sludge dewatering method Granted publication date: 20110202 License type: Exclusive License Record date: 20150520 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180108 Address after: Nansha District Hengli Town, Guangzhou city of Guangdong province 511466 Hexing Road No. 56 Patentee after: Guangzhou Luyou Industrial Waste Recycling Co., Ltd. Address before: 511450, No. three, No. 101, No. 5, East Village Road, East Village, Tai Lung Street, Fu Tung Road, Fu Yi Road, Guangzhou, Guangdong, Panyu District Patentee before: GUANGDONG LVYOU ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 511466 56 Hing Hing Road, Hengli Town, Nansha District, Guangzhou, Guangdong Patentee after: Guangzhou Zhong Tao green by environmental protection & Technology Co., Ltd. Address before: 511466 56 Hing Hing Road, Hengli Town, Nansha District, Guangzhou, Guangdong Patentee before: Guangzhou Luyou Industrial Waste Recycling Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20200917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |