CN101121084A - Method and equipment for solid-liquid separation - Google Patents
Method and equipment for solid-liquid separation Download PDFInfo
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- CN101121084A CN101121084A CNA2007100686548A CN200710068654A CN101121084A CN 101121084 A CN101121084 A CN 101121084A CN A2007100686548 A CNA2007100686548 A CN A2007100686548A CN 200710068654 A CN200710068654 A CN 200710068654A CN 101121084 A CN101121084 A CN 101121084A
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Abstract
The present invention discloses a solid-liquid separation method and equipment used for various organic and inorganic micro-granular suspensions or solid-liquid mixtures in industrial wastewater, paper pulp, living sludge, oiliness sludge etc. When a material for separating enters into for a compression and dehydration after a pretreatment, inspissation and pre-dehydration, the method adopts an independent filter belt to continuously compress and dehydrate in a belt style from low to high at a second grade or a higher grade of a compression intensity of pressure. The compression and dehydration section of the device includes two or more than two compression sections with independent filter belt and the compression intensity of pressure of which is from low to high. A material inlet of a lower pressure compression section is opposite to a material outlet end of a pretreatment and pre-dehydration section. The material inlet of a subsequent compression section is respectively opposite to the former material outlet end of the compression section. The present invention conquers the disadvantages of the prior art and has the advantages of scientific practicability, reasonable structure, flexible adjustment, high dehydration efficiency etc. A solid content proportion of the material, which adopts the solid-liquid separation, and dehydration of the present invention is improved to more than 40%, which achieve a semi-solidification level.
Description
Technical field
The present invention relates to a kind of solid-liquid separating method and equipment, the particularly a kind of various organic and inorganic microparticle suspension of industrial wastewater, paper pulp, domestic sludge, oily sludge or the like or the combined type of solidliquid mixture, unidirectional squeezing, half-driedization solid-liquid separating method and equipment of being exclusively used in.
Background technology
Water treatment plant, paper mill, food processing factory, chemical plant and plant etc. all can produce a large amount of microparticle suspension or solidliquid mixture material, comprise the semi-finished product of some manufacturers, or sewage, mud the like waste.The solid content of these materials has only 3-5%, and liquid component height, volume are big.According to the interrelated data record, moisture percentage in sewage sludge is reduced to 80%, its volume minimizing 75% from 95%; Be reduced to 50% from 80%, its volume also will reduce 60%.With regard to municipal sludge, moisture percentage in sewage sludge is high more finally to be handled with regard to difficult more, has only moisture content to be lower than at 40% o'clock, just is fit to burn and do compost.Therefore, these materials are entering later process such as oven dry, moulding, perhaps landfill, burn, do essential Separation of Solid and Liquid in advance before the final disposal of compost, promptly carry out processed, so that these materials after handling meet later process technological requirement, can raise the efficiency, energy savings, perhaps save the landfill soil, reduce sewage permeation, reduce the final disposal cost of discarded object.
Press dewatering method and belt filter press are that prior art is used more solid-liquid separating method and equipment.The main operating process of press dewatering method is generally: handle early stage → concentrate → pre-dehydration → press dewatering.Belt filter press mainly is made up of frame, drive unit, feed arrangement, processing in early stage and pre-drying zone, pressed zone and servicing unit.Drive unit comprises motor, gearbox; Processing in early stage and pre-drying zone are as vibration and gravity dehydration district; Servicing unit comprises idler roller, doctor blade device, water container, deviation correcting device and filter bag cleaning device or the like.The prior art belt filter press is in order to improve press dewatering efficient, and its pressed zone pressure roller diameter reduces gradually along the strainer direction of motion, and squeezing pressure is strengthened gradually; Pressed zone adopts the continuous strainer of dehydration up and down simultaneously, and the tension variation of dehydration strainer will cause the corresponding chain variation of dehydration pressure of all pressure roller.The belt filter press of this structure has following defective: 1, pressure roller are arranged from big to small along the strainer direct of travel, and squeezing pressure strengthens gradually, when last lower filter belt all moves under the high-tension state, causes the strainer serious wear; If one strainer adopts high-tension operation, another strip adoption low-tension operation, the low-tension strainer then can take place to get loose, can't run well.For avoiding strainer wearing and tearing or get loose, prior art can only be selected lower tension force operation, influences the raising of belt filter press filter cake mass dryness fraction.2, pressed zone is used continuous last lower filter belt from being fed to discharging, is difficult to make squeezing pressure, strainer aperture, filter cake properties three to keep Optimum Matching.Low-pressure area strainer aperture is too small can to reduce filter efficiency, should join bigger aperture; The excessive filter cake in strainer aperture, higher-pressure region can penetrate strainer, should join less aperture, and prior art can not be taken into account the requirement of high and low nip to strainer simultaneously, is difficult to keep the operation conditions of belt filter press the best.3, two strainers all adopt the dehydration strainer up and down, under the horizontally disposed situation of pressure roller on a big chunk in the isolated liquid of strainer again by the filter cake resorption; Simultaneously, last strainer perforate, the effect of pressurizeing downwards is bad, and Separation of Solid and Liquid is undesirable.If pressure roller are arranged vertically, though filter cake can both dewater in two strainer outsides, but,, the dewatering pressure direction constantly does the conversion of 180 degree because moving between pressure roller along with filter cake, portion of water in the filter cake can move back and forth between two strainers, make idle work, not only wasted energy, but also influenced solid-liquid separation effect.This " idle work " exists in horizontally disposed too.4, prior art can not realize squeezing the adjusting respectively of early stage and squeezing later stage pressure roller tension force, for fear of squeezing initial stage solid content when relatively lower, because the mud phenomenon is run at the two ends of the excessive generation of pressure, and can only the low-tension operation; And the low-tension operation makes to squeeze and pressed not water outlet because of too little pressure when the later stage, solid content was high, costs and poor dehydration results, thus make the solid-liquid separation efficiency of whole equipment not high.Because the defective of said structure restriction prior art can only be brought up to the solid content that contains the liquid material about 20-30%, can't reach more than 40%, can not be for the subsequent treatment of material or utilize once more good conditions is provided.
Chinese patent application 200610050778.9 " a kind of belt filter press " thus disclosing the employing steel cable adds pressure zone and improves tension force and improve dehydration pressure, realize improving the purpose of press dewatering efficient.The dehydration pressure of this belt filter press is being obtained substantial progress up to 3.0Mpa aspect the raising dehydrated material solid content.But because steel cable adds the material of pressure zone own and determines that its folding strength is relatively poor, service life is shorter, generally is no more than 2000 hours, has limited the fast development of this technology.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the defective that prior art exists, and the unidirectional press dewatering of a kind of classification, solid-liquid separation efficiency height are provided, and operates the more solid-liquid separating method of science and the solid-liquid separating equipment of more reasonable structure.
The present invention addresses the above problem the technical scheme that is adopted: this solid-liquid separating method, comprise and handle early stage, concentrate, dewater in advance and press dewatering, be characterized in: when this solid-liquid separating method enters press dewatering after material to be separated is through processing in early stage, concentrated and pre-dehydration, adopt independently that strainer carries out two-stage or the above continuous band press dewatering of two-stage, the squeezing pressure of described two-stage or the above press dewatering of two-stage from low to high.The solid content of dehydrated material improves gradually in the Separation of Solid and Liquid process of press dewatering, the required squeezing pressure of the dehydrated material of different solid contents is also different, squeezing pressure should improve along with the raising of solid content, adopt independently that the continuous press dewatering of strainer classification can satisfy this requirement, guarantee high efficiency press dewatering.
Each grade press dewatering all adopts tension force and the independent adjustable liquid-tight lower filter belt of going up pressure zone and saturating liquid of speed to carry out unidirectional dehydration in described two-stage of solid-liquid separating method of the present invention or the above press dewatering of two-stage.Tension force and speed are independently adjustable to make every grade of squeezing all be in optimum Working; The more two-way dehydration energy saving of unidirectional dehydration.
The present invention addresses the above problem the technical scheme that is adopted: this solid-liquid separating equipment, mainly comprise frame, drive unit, feed arrangement, processing in early stage and pre-drying zone, press dewatering district, servicing unit, its design feature is: described press dewatering district includes two or more and is furnished with independent filter belt, squeezing pressure pressed zone from low to high, low pressure pressed zone charging aperture is facing to the discharge end of processing in early stage and pre-drying zone, the charging aperture of follow-up pressed zone faces toward the discharge end of the pressed zone of front respectively, carries out continuous press dewatering.The design of two or more pressed zone has realized the classification squeezing.
The lower filter belt that adds pressure zone and saturating liquid on the strainer employing of described two or more pressed zone of solid-liquid separating equipment of the present invention is liquid-tight.Add pressure zone on liquid-tight and realized unidirectional press dewatering, solved in the expressing process isolated water, be beneficial to energy savings, improve dewatering efficiency by filter cake or strainer resorption.
The tension force that adds pressure zone and lower filter belt on solid-liquid separating equipment of the present invention is described is independent adjustable, and the Tension Difference between two straps increases along with the increase of tension force.On add pressure zone and lower filter belt the independent adjustable assurance solid-liquid separating equipment of tension force run well, guarantee dewatering efficiency.
Described two or more pressed zone of solid-liquid separating equipment of the present invention dispose independently drive unit, control the press dewatering speed of a motor vehicle separately respectively.Each pressed zone independence speed governing can adapt to the different solid content stages of expressing process dehydrated material well to the squeezing time of filter cake and the requirement of filter cake thickness.
The diameter of the higher-pressure region pressure roller in described two or more pressed zone of solid-liquid separating equipment of the present invention increases gradually or remains unchanged along the filter cake direction of motion.Guarantee the balance of linear velocity between the pressure roller of higher-pressure region, make lower filter belt in high-pressure compressing, not produce fold distortion or lax, guarantee that solid-liquid separating equipment runs well.
Higher-pressure region of the present invention pressure roller diameter designs according to the linear velocity analysis of adjacent two pressure roller.Referring to Fig. 6, to add pressure zone on being be the high tension band to a among the figure, and b is the promptly weak tension band of lower filter belt, R
1, R
2It is respectively the radius of adjacent two pressure roller.When the high tension band reaches certain tension force, at process R
1, R
2In the time of pressure roller, the high tension band tightly suppresses weak tension band, so two pressure roller are all driven by the high tension band, promptly the outmost turns linear velocity is V, establishes to enter R
1The linear velocity of pressure roller is V
1, go out R
2The linear velocity of pressure roller is V
2, the high tension tape thickness is h, then:
V
1＝V*R
1/(R
1+h)-------------------------------------------------(1)
V
2＝V*R
2/(R
2+h)-------------------------------------------------(2)
(1) formula-(2) formula draws:
V
1-V
2＝V*[R
1/(R
1+h)-R
2/(R
2+h)]----------------------------------(3)
If R
1=n*h, R
2=m*h
V
1-V
2＝V*(n/(1+n)-m/(1+m))＝V*(n-m)/[(1+n)*(1+m)]---------------(4)
Draw from formula (4):
Work as R
1＞R
2, n＞m, then V
1＞V
2, R
1, R
2Weak tension band can be more and more tighter between the pressure roller;
Work as R
1＜R
2, n＜m, then V
1＜V
2, R
1, R
2Weak tension band can be more and more lax between the pressure roller;
Work as R
1=R
2, n=m, then V
1=V
2, R
1, R
2Weak tension band maintains the original state in motion process between the pressure roller.
Low-pressure area pressure roller diameter in described two or more pressed zone of solid-liquid separating equipment of the present invention reduces gradually or remains unchanged along the filter cake direction of motion.Make the pressure roller diameter reduce to make the pressure of each pressure roller of low-pressure area to strengthen gradually gradually, guarantee the squeezing effect along the filter cake direction of motion.
Solid-liquid separating method of the present invention compared with prior art has the following advantages: solid-liquid separating method science of the present invention practicality, dewatering efficiency height.1, adopt independently, the strainer of tension force and speed dullness carries out two-stage or two-stage is above, press dewatering pressure classification continuous band press dewatering from low to high, make every grade of squeezing all be in optimum condition, can realize that press dewatering pressure improves along with the raising of dehydrated material solid content in the press dewatering process, make the later stage of press dewatering that higher squeeze pressure be arranged, improve press dewatering efficient effectively.2, adopt the liquid-tight pressurization band of going up to carry out unidirectional dehydration than the two-way dehydration energy saving of prior art.Use the 20%-30% of the solid content of solid-liquid separating method final dewatering material of the present invention, bring up to more than 40%, reach the semi-solid preparation level, for the subsequent treatment of dehydrated material has been created condition from the solid-liquid separating method of the continuous press dewatering of use prior art.
Solid-liquid separating equipment of the present invention compared with prior art has the following advantages: 1, rational in infrastructure, regulate flexibly.Solid-liquid separating equipment of the present invention has adopted the solid-liquid separating method of the continuous press dewatering of classification, its press dewatering district is the combined type pressed zone, be designed to the pressed zone that two or more are furnished with independent filter belt, can select according to different pressed zone dehydrated material solid contents, regulate squeezing pressure separately, the strainer tension force and the squeezing speed of a motor vehicle, and select aperture for use with coupling, percent opening, the strainer of weave and material, the solid-liquid separating equipment higher-pressure region is moved under high squeeze pressure, under the prerequisite that guarantees the high mass dryness fraction of filter cake, effectively prevent two ends leakage mud, the output that has improved solid-liquid separating equipment with separate mass dryness fraction, guaranteed the equipment higher production efficiency.2, pressed zone of the present invention adopts the lower filter belt that adds pressure zone and saturating liquid on liquid-tight, liquid is deviate from by lower filter belt, avoid the liquid in the filter cake in filter cake, to do disordered motion, make liquid under the last situation that adds pressure zone or lower filter belt and provide squeezing power all towards the motion of lower filter belt direction, reach energy savings, improve the purpose of squeezing efficient.
3, higher-pressure region of the present invention pressure roller diameter is arranged from small to large or is kept diameter the same, makes linear velocity balance between the pressure roller of higher-pressure region, and tension band does not produce fold distortion or lax in the pressurization motion, guaranteed the normal operation of equipment, has improved device efficiency.
Description of drawings
Fig. 1 is the press dewatering plot structure schematic diagram of embodiment 1 solid-liquid separating equipment.
Fig. 2 is Fig. 1 mesolow plot structure enlarged diagram.
Fig. 3 is Fig. 1 mesohigh plot structure enlarged diagram.
Fig. 4 is the press dewatering plot structure schematic diagram of embodiment 2 solid-liquid separating equipments.
Fig. 5 is Fig. 4 mesohigh plot structure enlarged diagram.
Fig. 6 is that the linear velocity of adjacent two pressure roller in high-pressure compressing district is analyzed schematic diagram.
The specific embodiment
Solid-liquid separating method embodiment of the present invention is divided into two-stage or the above press dewatering of two-stage with the press dewatering process, and the concrete operations step comprises to be handled → concentrate → pre-dehydration → multistage continuous press dewatering early stage.Embodiment handles in earlier stage and comprises stable, dehydrated material property regulation etc., generally to add a certain amount of conditioner such as flocculant, and abundant the stirring flocculated in blender, to change the dewatering of mud, the pre-dehydration of carrying out before press dewatering can be adopted vibration dehydration or gravity dehydration etc.The multistage press dewatering of embodiment according to dehydrated material performance, dehydration require to adopt independently, tension force and speed dullness liquid-tight on add pressure zone and saturating liquid lower filter belt carry out two-stage or three grades, continuous, the unidirectional press dewatering of level Four more than the two-stage, carry out the low pressure press dewatering earlier, carry out the high-pressure compressing dehydration again, squeezing pressure at different levels from low to high.
Solid-liquid separating equipment embodiment of the present invention is a kind of modified belt filter press, and its pressed zone is the combined type pressed zone, disposes two or more press dewatering districts.This equipment mainly comprises frame, drive unit, feed arrangement, processing in early stage and pre-drying zone, two or more press dewatering districts, servicing unit.Drive unit comprises motor, gearbox; Handling early stage with pre-drying zone can be to vibrate and the gravity dehydration district; Two or more press dewatering districts are furnished with pressure roller and surround the outer strainer independently separately of pressure roller, and the squeezing pressure of each pressed zone from low to high; Servicing unit comprises idler roller, doctor blade device, water container, deviation correcting device and filter bag cleaning device.Feed arrangement is facing to the feed end of processing in early stage and pre-drying zone, low pressure pressed zone charging aperture in two or more press dewatering districts is facing to the discharge end of processing in early stage and pre-drying zone, the charging aperture of follow-up pressed zone faces toward the discharge end of the pressed zone of front respectively, dehydrated material is carried out continuous press dewatering, and drive unit, feed arrangement, processing in early stage and pre-drying zone and press dewatering district all are installed on the frame.
Embodiment 1:
The present embodiment solid-liquid separating equipment disposes low pressure and two press dewatering districts of high pressure, and embodiment press dewatering plot structure is referring to Fig. 1-3.
Referring to Fig. 1,2, add pressure zone a on the present embodiment low pressure pressed zone and hold carrying roller 1, correction roller 2, carrying roller 3, main drive roller 4, carrying roller 7, pressure roller 6, carrying roller 5; Lower filter belt b holds carrying roller 8, carrying roller 5, pressure roller 6, carrying roller 7, main drive roller 4, carrying roller 10, correction roller 9.As shown in the figure, carrying roller 1,3,5,7,8,10, correction roller 2,9, main drive roller 4, pressure roller 6 are installed in respectively on upper spider 38, lower bearing bracket 39 and the underframe 40 of frame.Surround carrying roller 1 below outer on add pressure zone a and form dehydration low-pressure area charging apertures with surrounding the carrying roller 8 lower filter belt b above outer, facing to handling the early stage of solid-liquid separating equipment and the discharge end of pre-drying zone.Owing to used add pressure zone and strainer is synthetic composite band, have certain extensibility, so on carrying roller 1 and the carrying roller 8 rack-mounted slide rails respectively by oil cylinder 30 and 31 control positions, in order to revise the displacement that synthetic composite band elongation causes. Cylinder 33 and 32 is controlled correction roller 2 and 9 respectively, on correction roller 2 and the 9 rack-mounted slide rails.Be installed in the below of carrying roller 3 after main drive roller 4 leans on, on add pressure zone a and lower filter belt b separates here, on add pressure zone a and up walk, lower filter belt b walks downward, form the discharging opening of a low-pressure area, facing to the charging aperture in high-pressure compressing district, lower filter belt b holds main drive roller 4 places doctor blade device is housed.
Referring to Fig. 1,3, add pressure zone c in the present embodiment high-pressure compressing district and hold carrying roller 12, correction roller 13, idler roller 14, carrying roller 15, main drive roller 25, pressure roller 24, carrying roller 23, pressure roller 22, carrying roller 21, pressure roller 20, carrying roller 19, pressure roller 18, carrying roller 17, carrying roller 16; Lower filter belt d holds carrying roller 11, carrying roller 17, pressure roller 18, carrying roller 19, pressure roller 20, carrying roller 21, pressure roller 22, carrying roller 23, pressure roller 24, carrying roller 26, carrying roller 28, idler roller 29, correction roller 27.As shown in the figure, carrying roller 11,12,15,16,17,19,21,23,26 and 28, correction roller 13 and 27, idler roller 14 and 29, main drive roller 25, pressure roller 18,20,22 and 24 are installed in respectively on upper spider 38, lower bearing bracket 39 and the underframe 40 of frame.Add pressure zone c on below surrounding outside the carrying roller 16 and surround carrying roller 11 outer top lower filter belt d formation higher-pressure region charging apertures, facing to the discharging opening in low pressure press dewatering district.The discharging opening of the lower filter belt d formation high-pressure compressing district dehydrated material above adding pressure zone c on below surrounding outside the main drive roller 25 and surrounding outside the carrying roller 26, after carrying roller 26 will lean on than the installation site of main drive roller 25, discharging opening was equipped with doctor blade device.Correction roller 13 and 27 is contained on the slide rail of frame, and cylinder 34 and 35 control correction rollers 13 and 27 play the correction effect.Idler roller 14 and 29 is installed on the slide rail of frame, oil cylinder 37 and 36 control idler roller 14 and 29 tension.
The lower filter belt b, the d that add pressure zone a, c and saturating liquid on the strainer employing in present embodiment press dewatering district is liquid-tight, low-pressure area is different with the belt that the higher-pressure region is selected for use, low-pressure area can be selected the bigger polyester webs strainer of dehydrating amount for use, the higher-pressure region uses hard-packed satin to knit filter cloth, under high pressure embeds strainer to prevent filter cake.On add pressure zone a, c atresia, exerted pressure when liquid-tight both has been convenient to squeeze, avoided water that squeezing comes out by strainer and filter cake resorption again; Another benefit of band employing different materials is to find the material higher than filter cloth intensity that strong force squeezing power is provided easily up and down, with regard to prior art, strainer will accomplish not only to satisfy that press dewatering under this solid content and the material proterties condition requires but also can be very difficult such as operation under the above condition of 100 kilograms per centimeter for a long time at high-tension.
The tension force that adds pressure zone a, c and lower filter belt b, d on the present embodiment is independent adjustable, Tension Difference between two straps increases along with the increase of tension force, when 50 kilograms per centimeter are following, can adopt identical tension force such as tension force, when 80 kilograms per centimeter, will keep the Tension Difference more than 20%, and the Tension Difference more than 50% will be arranged when 100 kilograms per centimeter are above.Purpose in the enough Tension Difference of maintenance under the high tension condition is to guarantee not slide between high tension pressure roller place two straps, allow back speed discrepancy slide and all between weak tension force pressure roller and non-pressed zone, finish balance, can reduce the wearing and tearing of belt so to greatest extent.In actual applications, low lower tension force and the less Tension Difference of adopting of low pressure pressed zone solid content, high-pressure compressing district solid content height then adopts higher tension force and bigger Tension Difference.
Two pressed zone of present embodiment dispose independently drive unit, control the press dewatering speed of a motor vehicle separately respectively.After the diameter of pressure roller and cornerite were determined, the speed of a motor vehicle had determined the squeezing time and the filter cake thickness of filter cake, and the low speed of a motor vehicle squeezing time is long, filter cake thickness is big, be fit to solid content squeezing when low,, need long dewatering time because the low cake dewatering amount of solid content is bigger; High speed of a motor vehicle squeezing time is short, and filter cake thickness is little, is fit to solid content squeezing when high, though because the high filter cake dehydrating amount of solid content is few, more difficult being removed requires thin filter cake thickness with minimizing press dewatering resistance.Each pressed zone is disposed the drive unit of independent speed governing, can adapt to the requirement of different solid content stage filter cake squeezings well.
Dwell time when squeezing in order to prolong dehydrated material reaches the purpose that increases the dehydrated material mass dryness fraction, and two pressure roller are installed in the high-pressure compressing district at least.Higher-pressure region pressure roller diameter increases gradually or remains unchanged along the filter cake direction of motion, this be because when the pressure roller diameter when the filter cake direction of motion increases gradually, can make weak tension band along the tensioning gradually of the filter cake direction of motion, if it is opposite, will make weak tension band lax gradually along the filter cake direction of motion, two belt tension differences are big more, filter cake frictional force is big more, and this tensioning gradually or lax phenomenon just show obviously more on weak tension force pressure roller.Maintenance is useful to the press dewatering of weak band to the suitable tensioning of weak band, but works as the ability to bear that this tensioning has gradually surpassed weak band, will be broken; When the above-mentioned lax elastic shrinkage scope that has surpassed weak band gradually, weak band will break away from filter cake and operation can't be continued.If high tension pressure roller diameter remains unchanged, so weak band just neither can be tensioned can be by not lax yet.Higher-pressure region carrying roller diameter reduces gradually or remains unchanged along the filter cake direction of motion, the rotating speed of carrying roller only depends on the linear velocity of high tension band, the purpose that the carrying roller diameter reduces gradually is to improve pressure on it gradually, prevents the water that the filter cake resorption takes off, and keeps dehydrating effect.Low-pressure area pressure roller diameter all is to reduce gradually or remain unchanged along the filter cake direction of motion.The filter cake solid content of low-pressure area is lower, about 18-25%, the sliding of filter cake is better, still can adopt the pressure roller diameter of prior art to receive little design gradually such as the solid content of municipal sludge, the pressure of each pressure roller is strengthened gradually, guarantee the squeezing effect.Present embodiment higher-pressure region pressure roller 18,20,22 are designed to the same with 24 diameter.
During use, material to be drained off is through concentrating, stable, mud is regulated, after the pre-dehydration, solid content is 10-30%, enter on the lower filter belt b from solid-liquid separating equipment low pressure pressed zone material charging aperture of the present invention, through carrying roller 5, pressure roller 6, holder rod 7 and main drive roller 4 carry out the low pressure press dewatering, scraped by scraper to the lower filter belt d at high pressure pressed zone charging aperture place at low pressure pressed zone discharging opening and to enter the high-pressure compressing district, through carrying roller 17, pressure roller 18, carrying roller 19, pressure roller 20, carrying roller 21, pressure roller 22, carrying roller 23, pressure roller 24, behind the high-pressure compressing of main drive roller 25, material reaches certain mass dryness fraction, discharging opening in the high-pressure compressing district is scraped by scraper, finishes whole press dewatering process.Use the material solid content of the present invention's dehydration to reach more than 40%.
Application example 1, handle paper mill sludge:
Appliance doors 1500 millimeters, mud solid content 20% before the dehydration.Add pressure zone on the low-pressure area and adopt compound adhesive tape, tension force 70 kilograms per centimeter; Lower filter belt adopts polyester webs, Air permenbility 1600 L/m
2.S, tension force 50 kilograms per centimeter, 8 meters/minute of the speed of a motor vehicle go out low-pressure area mud solid content 35%.Add pressure zone on the higher-pressure region and adopt compound adhesive tape, tension force 150 kilograms per centimeter; Lower filter belt adopts polyester filament filter cloth, Air permenbility 400 L/m
2.S, tension force 50 kilograms per centimeter, 10 meters/minute of the speed of a motor vehicle, outlet filter cake solid content 53%, 3 millimeters of thickness.
Application example 2, handle municipal sludge:
Appliance doors 1500 millimeters, mud solid content 18% before the dehydration.Add pressure zone on the low-pressure area and adopt compound adhesive tape, tension force 60 kilograms per centimeter; Lower filter belt adopts polyester webs, Air permenbility 3000 L/m
2.S, tension force 50 kilograms per centimeter, 6 meters/minute of the speed of a motor vehicle go out low-pressure area mud solid content 30%.Add pressure zone on the higher-pressure region and adopt compound adhesive tape, the tension force 120 kg/centimetre; Lower filter belt adopts polyester filament filter cloth, Air permenbility 850 L/m
2.S, tension force 50 kilograms per centimeter, 8 meters/minute of the speed of a motor vehicle, outlet filter cake solid content 50%, 2 millimeters of thickness.
Application example 3, handle printing and dyeing sludge:
Appliance doors 1500 millimeters, mud solid content 28% before the dehydration.Add pressure zone on the low-pressure area and adopt compound adhesive tape, the tension force 120 kg/centimetre; Lower filter belt adopts polyester filament filter cloth, Air permenbility 850 L/m
2.S, tension force 70 kilograms per centimeter, 8 meters/minute of the speed of a motor vehicle go out low-pressure area mud solid content 38%.Add pressure zone on the higher-pressure region and adopt compound adhesive tape, tension force 150 kilograms per centimeter; Lower filter belt adopts polyester filament filter cloth, Air permenbility 850 L/m
2.S, tension force 70 kilograms per centimeter, 10 meters/minute of the speed of a motor vehicle, outlet filter cake solid content 65%, 4 millimeters of thickness.
Embodiment 2:
The present embodiment solid-liquid separating equipment disposes low pressure, three press dewatering districts of medium and high pressure, and embodiment press dewatering plot structure is referring to Fig. 4,5.
The structure of present embodiment low pressure pressed zone is identical with the low pressure pressed zone of embodiment 1; In press pressed zone structure with the high-pressure compressing district of embodiment 1.The structure in high-pressure compressing district is referring to Fig. 5, on add pressure zone e and hold carrying roller 42, correction roller 43, idler roller 47, carrying roller 45, main drive roller 54, pressure roller 53, carrying roller 52, pressure roller 51, carrying roller 50, carrying roller 49, lower filter belt f holds carrying roller 48, carrying roller 50, pressure roller 51, carrying roller 52, pressure roller 53, carrying roller 55, carrying roller 59, idler roller 60, correction roller 56.As shown in the figure, carrying roller 42,45,48,50,52,55 and 59, correction roller 43 and 56, idler roller 47 and 60, main drive roller 54, pressure roller 51 and 53 are installed in respectively on upper spider 38, lower bearing bracket 39 and the underframe 40 of frame.Add pressure zone e on below surrounding outside the carrying roller 49 and surround carrying roller 48 outer top lower filter belt f formation dehydrated material imports, facing to the discharging opening in middle pressure press dewatering district.The outlet of the lower filter belt f formation high-pressure compressing district dehydrated material above adding pressure zone e on below surrounding outside the main drive roller 54 and surrounding outside the carrying roller 55, after carrying roller 55 will lean on than the installation site of main drive roller 54, discharging opening was equipped with doctor blade device.Correction roller 43 and 56 is contained on the slide rail of frame, and cylinder 44 and 57 control correction rollers 43 and 56 play the correction effect.Idler roller 47 and 60 is installed on the slide rail of frame, oil cylinder 46 and 58 control idler roller 47 and 60 tension.
Referring to Fig. 4, the low-pressure area discharging opening of embodiment is facing to the charging aperture of middle nip, and the discharging opening of middle nip is facing to the charging aperture of higher-pressure region.Other structure of present embodiment is same as embodiment 1.
Except press dewatering process low-pressure area → three grades of press dewaterings in middle nip → higher-pressure region, other all was same as embodiment 1 when present embodiment used.
Solid-liquid separating method of the present invention is handled, is concentrated and pre-dehydration described early stage, and the described frame of solid-liquid separating equipment, drive unit, feed arrangement, handle early stage and pre-drying zone and servicing unit all adopt industry technique known and device.
Claims (8)
1. solid-liquid separating method, comprise and handle early stage, concentrate, dewater in advance and press dewatering, it is characterized in that: when this solid-liquid separating method enters press dewatering after material to be separated is through processing in early stage, concentrated and pre-dehydration, adopt independently that strainer carries out two-stage or the above continuous band press dewatering of two-stage, the squeezing pressure of described two-stage or the above press dewatering of two-stage from low to high.
2. solid-liquid separating method according to claim 1 is characterized in that: each grade press dewatering all adopts tension force and the independent adjustable liquid-tight lower filter belt of going up pressure zone and saturating liquid of speed to carry out unidirectional dehydration in the above press dewatering of described two-stage or two-stage.
3. solid-liquid separating equipment of implementing the described solid-liquid separating method of claim 1, mainly comprise frame, drive unit, feed arrangement, processing in early stage and pre-drying zone, press dewatering district, servicing unit, it is characterized in that: described press dewatering district include two or more be furnished with independent filter belt, squeezing pressure pressed zone from low to high, low pressure pressed zone charging aperture is facing to the discharge end of processing in early stage and pre-drying zone, the charging aperture of follow-up pressed zone faces toward the discharge end of the pressed zone of front respectively, carries out continuous press dewatering.
4. solid-liquid separating equipment according to claim 3 is characterized in that: the lower filter belt that adds pressure zone and saturating liquid on the strainer employing of described two or more pressed zone is liquid-tight.
5. solid-liquid separating equipment according to claim 4 is characterized in that: the tension force that adds pressure zone and lower filter belt on described is independent adjustable, and the Tension Difference between two straps increases along with the increase of tension force.
6. solid-liquid separating equipment according to claim 5 is characterized in that: described two or more pressed zone dispose independently drive unit, control the press dewatering speed of a motor vehicle separately respectively.
7. solid-liquid separating equipment according to claim 6 is characterized in that: the diameter of the higher-pressure region pressure roller in described two or more pressed zone increases gradually or remains unchanged along the filter cake direction of motion.
8. solid-liquid separating equipment according to claim 7 is characterized in that: the diameter of the pressure roller of the low-pressure area in described two or more pressed zone reduces gradually or remains unchanged along the filter cake direction of motion.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100686548A CN100558440C (en) | 2007-05-18 | 2007-05-18 | A kind of solid-liquid separating method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100686548A CN100558440C (en) | 2007-05-18 | 2007-05-18 | A kind of solid-liquid separating method and equipment |
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| Publication Number | Publication Date |
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| CN101121084A true CN101121084A (en) | 2008-02-13 |
| CN100558440C CN100558440C (en) | 2009-11-11 |
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| CNB2007100686548A Expired - Fee Related CN100558440C (en) | 2007-05-18 | 2007-05-18 | A kind of solid-liquid separating method and equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279812B (en) * | 2008-05-21 | 2010-06-02 | 华章电气（桐乡）有限公司 | Circular press dewatering method |
| CN105693061A (en) * | 2016-01-22 | 2016-06-22 | 中国石油化工股份有限公司荆门分公司 | Oily sludge harmless treatment method for petrochemical wastewater treatment station |
| CN106739088A (en) * | 2016-12-02 | 2017-05-31 | 诸城市清润环保科技有限公司 | A kind of four net belt types grain residues hydroextractor |
| CN107350268A (en) * | 2017-08-04 | 2017-11-17 | 怡然科技（深圳）有限公司 | The solid-liquid separation device of driven type |
| CN112672805A (en) * | 2018-12-07 | 2021-04-16 | 月岛机械株式会社 | Solid-liquid separation device and filter device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109011817A (en) * | 2018-07-27 | 2018-12-18 | 朱忆人 | It is a kind of can lamination absorption solid-liquid separating equipment |
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2007
- 2007-05-18 CN CNB2007100686548A patent/CN100558440C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279812B (en) * | 2008-05-21 | 2010-06-02 | 华章电气（桐乡）有限公司 | Circular press dewatering method |
| CN105693061A (en) * | 2016-01-22 | 2016-06-22 | 中国石油化工股份有限公司荆门分公司 | Oily sludge harmless treatment method for petrochemical wastewater treatment station |
| CN106739088A (en) * | 2016-12-02 | 2017-05-31 | 诸城市清润环保科技有限公司 | A kind of four net belt types grain residues hydroextractor |
| CN107350268A (en) * | 2017-08-04 | 2017-11-17 | 怡然科技（深圳）有限公司 | The solid-liquid separation device of driven type |
| CN112672805A (en) * | 2018-12-07 | 2021-04-16 | 月岛机械株式会社 | Solid-liquid separation device and filter device |
| CN112672805B (en) * | 2018-12-07 | 2022-08-12 | 月岛机械株式会社 | Solid-liquid separation device and filter device |
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|---|---|
| CN100558440C (en) | 2009-11-11 |
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Address after: 314500 Zhenhua Road, second industrial zone, Tongxiang Economic Development Zone, Zhejiang, Tongxiang 1068, China Patentee after: Zhejiang Huazhang Technology Co., Ltd. Address before: 314500 Zhenhua Road, second industrial zone, Tongxiang Economic Development Zone, Zhejiang, Tongxiang 1068, China Patentee before: Huazhang Electric (Tongxiang) Co., Ltd. |
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