CN1182907C - Strong expression blade type filter - Google Patents
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- CN1182907C CN1182907C CNB031370683A CN03137068A CN1182907C CN 1182907 C CN1182907 C CN 1182907C CN B031370683 A CNB031370683 A CN B031370683A CN 03137068 A CN03137068 A CN 03137068A CN 1182907 C CN1182907 C CN 1182907C
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Abstract
The present invention discloses a blade type filter with a bearing rigidity closed casing, a filter blade and a filtered liquid discharging pipeline. The blade type filter is characterized in that the blade type filter also comprises a hollow sac connected with a high pressure fluid source. After the conventional filter pressing is completed, high pressure fluid is filled into the sac, the sac strongly squeezes a press cake, and the liquid of the press cake is further removed. The blade type filter is especially suitable for extracting black liquor and washing pulp, and can be called as a black liquor extracting machine, the black liquor extracting rate reaches more than 90% and even reaches more than 98%, and the black liquor pollution can be thoroughly eliminated. Compared with the existing black liquor extracting equipment, the blade type filter has high concentration of the extracted black liquor, low manufacturing cost of the equipment and less power consumption, and can save a large amount of water.
Description
Technical field
The present invention relates to squeeze leaf filter, in more detail, relate to filter residue that pressure filtration is gone out, carry out the leaf filter of strong force squeezing once more.It is particularly suitable for the mixture of branch syneresis and black liquor, extracts black liquor, is referred to as " extracting the black liquor machine ".
Technical background
Plant is rich in the part of fiber with the water chemical solution boiling, and complicated chemical reaction takes place for chemicals and plant.As a result, fiber still keeps the solid phase form, becomes paper pulp; The product of other component of plant and chemicals reaction is an accessory substance, is dispersed in the water base cooking liquor, constitutes cooking waste liquor, and alkaline waste liquor is black, is commonly called as black liquor or raw black liquid.Black liquor vaporizing to doing, can be left these accessory substances of solid forms, be referred to as solid content.After the boiling, slurry and raw black liquid mix from digesting apparatus discharges.Black liquor solid need be separated with slurry, after the separation, the slurry that does not contain black liquor solid is used to copy paper through bleaching; The black liquor that contains solid content will be disposed, and prevents its contaminated environment.Black liquor is made of water and solid content, and actual pollution sources are the solid contents that are dispersed in the black liquor.
At present, slurrying both at home and abroad already is extensive use of vacuum pulp washing machine multistage counter current pulp washing, extracts black liquor, and black liquor solid is separated with slurry.Vacuum pulp washing machine has rotary drum and horizontal belt, generally uses four～six sections adverse current pulp washings, and hop count is many more, and effect is good more.Separate through the vacuum pulp washing machine pulp washing, most of black liquor solid is dispersed in " black liquor of extraction ", but still some solid content is dispersed in from the slurry that vacuum pulp washing machine is sent.In the industry, use " extraction rate of black liquor " this notion to weigh the completeness that solid content separates with slurry, the total solid of discharging from digesting apparatus is defined as 100%, separate with slurry through solid content, just pulp washing extracts black liquor, and the percentage that the amount of contained solid content accounts for total amount in the black liquor of extraction is defined as " extraction rate of black liquor ".Obviously, dispose " black liquor of extraction ", can only eliminate the pollution sources in the black liquor, the solid content pollution sources of carrying secretly in the slurry are dispersed in the further pulp washing institute water.
Concentrating, when burning method is handled " black liquor of extraction ", be the cost of control evaporation and concentration black liquor, " black liquor of the extraction " amount of wishing will be less, concentration wants high, and this has just limited extraction rate of black liquor.Even American-European slurrying big country, use the main equipment of benefit on the largest scale, after the boiling, increase the pressurization concentration difference displacement course of slurry and raw black liquid again, to increase the concentration of extracting black liquor, its extraction rate of black liquor does not satisfy the requirement of the environmental emission standard of increasingly stringent yet.Spread out with existing technology path, will improve extraction rate of black liquor again, pay a price.
With regard to pulp washing, extract with regard to the equipment of black liquor, (98 pages) touch upon in " Straw Pulp alkali recovery technology guide " book of Zhang Ke and Yu Zhengqian chief editor, " divide to advance to starch concentration, can be divided into high dense advance slurry and the low dense slurry two big classes of advancing to washing device.The high dense equipment that advances slurry equipment system based on extruding and dilution." this book then introduces high dense kind and shortcoming thereof of advancing to starch equipment, final sumbission is: " produce and use the result to show, the high dense extrusion equipment of this class is applicable to that not too plasticity is poor, the Straw Pulp of drainability difference, is eliminated basically at present.”
The China's Forest Resources scarcity, the slurrying industry is based on straw pulp.The management layer expert praises highly and spreads out with traditional Silvola recovery straw pulping black liquor in the industry.(1999) No. 273 literary compositions of environment-development, " recommending to adopt conventional firing method alkali recovery technology the waste water treatment complete set technology that is core ", for this reason, country and enterprise drop into a large amount of technological transformation funds, administer black liquor pollution.
From technical standpoint, dogstail is more siliceous than timber, sugar content is high, and the black liquor viscosity that boiling goes out is big; Grass fiber is shorter and thin than lumber fibre, is difficult to washing.Simply apply mechanically the vacuum pulp washing machine pulp washing of external wood pulp, extract black liquor, the extraction rate of black liquor of technological design can only reach 80～85%; In fact, the wheat straw chemical recovery system extraction rate of black liquor of current operation is generally on the low side.Its result is not only and causes alkali recovery low, and the treatment cost height be the more important thing is, the solid content of staying in the slurry needs a large amount of washing slurries, and pulp washing water also needs biochemical treatment.Unfortunately, the lignin difficulty in the pulp washing water is decomposed by aerobic bacteria, and discharge of wastewater is difficult to up to standard.So that, in " Straw Pulp alkali recovery technology guide " (Zhang Ke, Yu Zhengqian chief editor) book, the 19th page head argument " too Yan Ge Chinese papermaking emission of industrial pollutants standard should be revised as early as possible, makes it to meet national conditions ".Wherein " meeting national conditions " of opinion be exactly to meet China's slurrying industry based on straw pulp, very big national conditions of Straw Pulp proportion particularly; Even administer by the method that this book is promoted, also difficulty reaches the national conditions of " too strict emission control standards ".
There is technological deficiency in " Straw Pulp alkali recovery technology " in view of present popularization.In the annex of (1999) No. 273 literary compositions of State Environmental Protection Administration's environment-development " papermaking straw pulp industry contaminated wastewater Prevention Technique policy "; article 16, in the wastewater treating technology research field that encouragement is carried out; its (2) money is exactly that " exploitation straw pulp black liquor high efficiency extraction equipment reaches more than 90% extraction rate of black liquor.”
Classical slurrying theory is thought, slurry that alkaline cooking goes out and raw black liquid, and the liquid slurry is than being 8～9m
3Raw black liquid/ton air dried pulp; The raw black liquid amount that is retained in the thick liquid cell pars intramuralis capillary is 0.3～0.4m
3/ ton air dried pulp; Be included in the intercellular layer of fiber and the raw black liquid amount in the cell is 1～1.5m
3/ ton air dried pulp; Remaining black liquor is to be centered around single fiber and fibre bundle free black liquor on every side.Strengthen squeeze pressure, can squeeze out most of black liquor.
Moisture or (black liquor) amount g/ oven dry stock g in the slurry
The soft slurry of pressure Mp sulfate hard stock sulphite
Containing density in the slurry in the aqueous slurry for containing density in the aqueous slurry in the slurry is
1.12g/cm
3Black liquor 1.04g/cm
3Waste liquid
0 23.10 23.60 25.60 26.40
0.5 1.80 1.85 1.83 1.95
1.0 1.52 1.62 1.53 1.70
2.0 1.28 1.31 1.30 1.33
10.0 0.81 0.85 0.83 0.85
15.0 0.65 0.69 0.67 0.70
Select from " sulfate pulping " book the 245th page table, Russian Nie Baining work, Liu Changen translates, Light Industry Press's nineteen ninety-five version.
When research separated the filter of black liquor precipitation, the inventor felt that the improved filter can extract black liquor.For many years, the slurrying industry is being eliminated the high dense extrusion equipment that advances to starch always, uses the low dense vacuum displacement washing device that advances to starch instead, no longer studies extrusion equipment.Chance opportunity has the honor to learn hydraulic technique, unexpected find and realize the truth to, hydraulic pressure mechanism is used for pressure filtration, improve the pressurization leaf filter, just can extract black liquor by enough its.Extract black liquor equipment with existing pulp washing and compare, improved filter cost is low, little power consumption, water saving and extraction rate of black liquor height in a large number.
The pressurization leaf filter has the rigidity sealing shell, the built-in filter leaf group of shell, filter leaf is made of saturating liquid rigid frame, in have living space and communicate the outer cover filter cloth with Drainage pipe.Slurry that boiling goes out and black liquor mixture pump in the shell, and black liquor passes filter cloth, discharge after entering the filter leaf space; Slurry amasss outside filter cloth, forms the slurry cake.Weak point is that pump pressure is not high enough, even pump pressure is enough high, the pressure reduction that is delivered to the filter cloth both sides is also not high enough, and after the press filtration, remaining black liquor amount is also too many in the slurry cake, can not improve extraction rate of black liquor fruitfully.
Improvements are, in the filter head housings, near the position of every place filter cloth, dispose hollow capsule relatively, and the volume that empty pocket occupies is very little, and capsule communicates with high-pressure fluid source.By above-mentioned press filtration, in the long-pending full filter head housings of slurry cake, when press filtration does not go out black liquor again by pump, close slurry and black liquor inlet again; Fill high-pressure fluid in capsule, capsule volume expands, powerful extruding slurry cake.In the filter rigid crust, remove the slurry cake and be under pressure, the contained black liquor of squeezing out, discharge again, dwindle outside institute takes up space, remaining filter leaf and pipeline etc. all can not reduced volumes.The pressure of squeezing slurry cake comes from high-pressure fluid, and the following high-pressure fluid source of 10Mpa is easy to obtain, and is enough to make the slurry cake to contain the black liquor amount and arrives 2m less
3Below/ton the air dried pulp, very at least to 1.5m
3Below/ton the air dried pulp.Strong force squeezing is once just isolated 70% even 85% raw black liquid slurry that can go out from boiling and the raw black liquid at least.
Then, the black liquor that emptying squeezes out is closed after the black liquid outlet, and the blocking-up high-pressure fluid source is discharged capsule mesohigh fluid, the volume-diminished of capsule; Pump into washing pulp again, infiltration slurry cake; Open sludge outlet, the washing pulp that pumps into is gone out slurry in the reduction paste cake.
Therefore, the purpose of this invention is to provide a kind of strong force squeezing leaf filter, its improvements are, with the high-pressure fluid is the strong force squeezing power source, the capsule volume that utilization is pre-configured in the filter expands, and accumulates in the filter cake in the filter after the conventional press filtration of strong force squeezing, makes filter cake further take off liquid.
Another purpose of the present invention provides the strong force squeezing leaf filter that extracts black liquor a kind of slurry that goes out from boiling and the raw black liquid mixture, can be referred to as " extracting the black liquor machine ".
Still a further object of the present invention provides a kind of from slurry mixture, go out the strong force squeezing leaf filter of original liquid with another kind of liquid displacement, can be referred to as " displacement washer ".
A present invention also purpose provides a kind of usefulness " extraction black liquor machine " displacement pulp washing extraction black liquor and the method for handling black liquor.
Strong force squeezing leaf filter provided by the invention, or claim " extracting the black liquor machine ", simple in structure, processing ease, no wear-out part, long service life.Separate raw black liquid with its slurry that goes out from boiling and the raw black liquid mixture, one takes turns strong force squeezing, can isolate the raw black liquid of total amount 70% at least even 85%.
Extract black liquor with it, guaranteeing to extract black liquid consistency than using now under the high prerequisite of vacuum pulp washing machine, extraction rate of black liquor is easy to reach more than 90%, even more than 95%.With its extract send the raw black liquid that alkali reclaims after, carry out two-wheeled displacement pulp washing again, extract rare black liquor; Rare black liquor and calcium chloride reaction back Separation of Solid and Liquid, isolated solid burns, the clear liquid reuse; Be easy to accomplish more than total extraction rate reached to 98% of former, rare black liquor.Extract black liquor equipment with existing pulp washing and compare, " extracting the black liquor machine " of the present invention has that cost is low, little power consumption and the programmable advantage of operation automatically.Use in the slurrying industry can increase substantially extraction rate of black liquor, saves the slurrying water consumption, solves because of the general pollution problem that causes on the low side of extraction rate of black liquor, solves the problem that the present Straw Pulp alkali recovery technology of promoting can not be up to standard.
Summary of the invention
A kind of squeezing leaf filter is made up of filter leaf in pressure-bearing outer rigid housing and the shell, is used to extract black liquor or displacement pulp washing, it is characterized in that,
Filter leaf is arranged at interval, disposes hollow capsule therebetween, and filter cake accumulates between hollow capsule and the filter leaf; Hollow capsule is subjected to external pressure, and cyst wall is superimposed, and the volume that occupies is very little; When squeezing, charge in the hollow capsule high-pressure fluid by cyst wall towards periphery all directions exert pressure the squeezing filter cake; Follow the hollow capsule fluid pressure to increase, capsule volume increases, its volume and be greater than 1/2nd of the interior space of filter at least.
The meaning of " pressure-bearing rigidity sealing shell " is, in capsule, charge into high-pressure fluid after, this shell bears the interior pressure of high-pressure fluid source, still can keep original geometry and seal.
" filter leaf " is the filter element of leaf filter, the member of being made up of porous plate, tubing or wire netting.Have living space in this member body, but the overcoat filter cloth, filtrate penetrates filter cloth and enters its space, and the space is communicated with the pipeline of discharging filtrate, and filtrate is discharged along pipeline.In addition, be fit to filter leaf of the present invention, can under the pressure of high-pressure spray somatocyst, keep shape, keep filtrate channel, discharge filtrate.The filter area that the filter cloth of outer casing inner wall, the multiple cover in surface and support therebetween constitute; The filtrate channel that the filter cloth of rubber hollow capsule outer surface, suit and support form; The function that all has filter leaf all belongs to the scope of said " filter leaf " herein.
" filter cloth " as herein described two words are meant any have even intensive fine duct, thin thickness, filtering material that area is big.It allows that liquid or gas pass through, and does not allow that solid particle passes through, and is the stock of filtration.It is not can only be fabric, also comprises woven wire, and the metallic plate of intensive pore etc. is arranged.
" capsule " word is meant any hollow closed container herein, charge into high-pressure fluid after, volumetric expansion, up to its internal and external pressure balance, volume just no longer expands; Even intraluminal pressure is outer higher than capsule, capsule relies on self intensity, can also keep its seal and integrity.But the capsule flexible pocket is subjected to external pressure, and cyst wall is superimposed, and the volume that occupies is very little, as capsule, the rubber bag tank that macromolecule membrane constitutes, the capsule of composite fibre in the rubber.
" high-pressure fluid " that charge in the capsule can be any fluid, as compressed air, water or oil.High-pressure fluid source is a pressue device, as air compressor, centrifugal pump, multistage pump, reciprocating pump etc." high pressure " of high-pressure fluid surpasses the pressure that is pressed into solidliquid mixture, and " extracting the black liquor machine " selects the pressure of 2～10Mpa, also can select more high pressure for use certainly.
" pressure filtration ", " press filtration " herein is meant with pump or other power source solidliquid mixture is pressed into leaf filter, filter; Perhaps directly pressurize, filter to solidliquid mixture with compressed air.Conceptive, do not comprise high-pressure spray somatocyst strong force squeezing.
" strong force squeezing " speech is meant and charges into high-pressure fluid in the capsule that capsule is the process of strong force squeezing filter residue that pressure filtration produces again.Compressed air is directly introduced filter, exert pressure, belong to the scope of this paper indication " pressure filtration ", can not evenly squeeze filter residue, the strong force squeezing effect that its effect produces not as capsule to filter residue.
Use the literal of " near the position of every place filter cloth, disposing hollow capsule relatively " herein, its implication comprises that hollow capsule is approaching from the filter cloth distance, and the strong force squeezing effect of capsule is applied on the filter residue of next-door neighbour's filter cloth; And capsule will be from every place, that just all have the distance at filter cloth place is approaching, so just can make as much as possible filter residue be subjected to the strong force squeezing of capsule; Capsule will mate with the geometry and the locus of filter cloth, so will dispose; Even configuration also can only be accomplished approaching relatively meticulously.
The said in the industry black liquor of " black liquor " general reference slurrying that occurs herein; " raw black liquid " is meant the black liquor that boiling produces, and it does not promptly pass through thin up, does not pass through evaporation and concentration yet." rare black liquor " is meant that the concentration ratio raw black liquid is rare, also by water and the black liquor that black liquor solid constituted that is dispersed in wherein.
Description of drawings
Accompanying drawing 1 is that strong force squeezing leaf filter conduct of the present invention " is extracted the black liquor machine " when using, the external pipe valve configurations figure of embodiment 1.
Accompanying drawing 2 is embodiment 1 " extract black liquor machine " facade views, illustrates its structure and operation principle.
Accompanying drawing 3 is the section plans that match with accompanying drawing 2 the first half, illustrates its structure and operation principle with accompanying drawing 2.
Accompanying drawing 5 is filter leaf in another embodiment of the present invention " arc equilateral triangle " and " the equilateral quadrangle of arc " schematic cross-sectional view.
The specific embodiment
But the pressure-bearing rigidity sealing shell Any shape of strong force squeezing leaf filter of the present invention, any structure.Simple shape is cylindrical shape or square tube shape, has respectively at the bottom of taper shape or the pyramid, and there is the filter residue of discharge mouth at the conical bottom center.Barrel shrond can add ellipse, dish or conical head; Square tube shape shell binds with pyramid.Connect with flange bolt between cylindrical shell, conical bottom and the end socket.The good rigidly of barrel shrond, bear press in high indeformable; With just making major diameter than sheet metal, bearing the shell of high pressure.In bearing, square tube shape presses ability, and yielding, need add reinforcement, it mates on geometry easily with filter leaf and hollow capsule.
Cooperate the filter leaf of square tube shape shell optional plate shaped, its thickness is thin as far as possible; Its length is less than head-to-foot distance, so that reserve solidliquid mixture and filter residue path respectively in top, bottom; Its width also will be reserved path less than the length of side of square tube section.Also can be at the length of side direction configuration multi-disc filter leaf of tube section, multi-disc filter leaf overall width adds reserves the path overall width near the tube section length of side between it.Filter leaf is arranged at interval, disposes hollow capsule therebetween, and filter cake accumulates between capsule and the filter leaf.
Intensive projection can be made in the outer casing inner wall surface of strong force squeezing leaf filter, covers filter cloth more again, and projection supports filter cloth, and filter cloth and inwall constitute filtrate channel, forms the part filter area.Said protruding support can be that a shape is protruding as cylinder, round platform, and linear projection can be a silk screen also, as spiral net.The equipped filtrate pipeline of discharging in filter leaf bottom, equipped compressed air in top and washing liquid lines.Behind pressure filtration and the strong force squeezing, can use the compressed air and the washing liquid lines of filter leaf top assembling, feed compressed air and blow down residue filtrate in the filter leaf according to order of steps; Feed cleaning solution, washing leaching cake; Feed compressed air or cleaning solution, clean filter cloth or blow, towards filter residue, filter residue is discharged from the slag notch at conical bottom center.
In addition, on the discharge filtrate pipeline that described filter leaf bottom is equipped with valve is housed, control is opened, is closed; On the washing liquid lines that the filter leaf top is equipped with valve is arranged also, control is opened, is closed.When washing leaching cake, open the valve on " part filter leaf " top washing liquid lines, close the valve on " with a part of filter leaf " discharge filtrate pipeline.Meanwhile, the valve on " another part filter leaf " washing liquid lines is in closed condition, and the valve of discharging on the filtrate pipeline is an opening state.Cleaning solution penetrates filter cloth from said " part filter leaf ", enters filter cake, and washing leaching cake enters " another part filter leaf " again, discharges along discharging the filtrate pipeline, finishes the process of washing leaching cake.
When strong force squeezing leaf filter of the present invention is used to extract black liquor, be called " extracting the black liquor machine "." extraction black liquor machine " will be handled hundreds of every day even go up the slurry and the raw black liquid mixture of kilostere, and essential volume is big, bears high interior pressure, charging and discharging automatically.Select cylindrical housing for use, good rigidly is saved material; Select for use conical head help the slurry and raw black liquid enter from the top; Select conical bottom to help discharging to extract the slurry mixture behind the black liquor for use.Practical " extracting the black liquor machine " housing diameter of industry all surpasses 1 meter, generally between 2～4 meters, highly generally is no more than 10 meters.The best filter leaf of rigidity is a metal pipe barrel, and the saturating liquid of perforate on the wall is as the basic filtering element; But also overcoat filter cloth is as filter element.
The optional flexible rubber bag of hollow capsule.Charge into high-pressure fluid in the capsule of " extract black liquor machine ", when carrying out strong force squeezing, capsule inner high voltage fluid by cyst wall towards periphery all directions exert pressure, have only in the slurry black liquor can penetrate filter cloth and then be discharged to outside the machine, expanding to capsule provides the space.Follow the capsule fluid pressure to increase, capsule volume increases, and black liquor is discharged gradually.When reaching the pressure of high-pressure fluid source in the capsule, pressure can not increase again, also just can not squeeze out black liquor again.
In the present invention's " black liquid extraction machine ", hollow capsule can imitate heat exchanger tube by equilateral triangle or square arrangement.In the transversal circle of cylindrical housing, circle centre position is a capsule, and the center of all the other capsules is arranged in equilateral triangle or foursquare summit; Equilateral triangle or foursquare center configuration socket shape filter leaf.In the pressure filtration process, capsule is subjected to external pressure, and cyst wall is superimposed, and the volume that occupies is very little.After being full of high-pressure fluid in the capsule, volumetric expansion, the restriction of shape receptaculum ectoplasm cake, filter leaf and adjacent bladders, incomplete rule, trend cylinder, its volume and be greater than 1/2nd of filter space at least.The top of capsule and filter leaf is as far as possible near end socket, and the bottom is as far as possible near conical bottom.
Be configured in the socket shape filter leaf at equilateral triangle center, its cross section can be circular, equilateral triangle, and preferable is " arc equilateral triangle ", is the triangle that same three convex surfaces constitute towards the arc limit, shown in accompanying drawing 5 left sides.Be configured in the filter leaf at square center, its cross section can be circular, square, and preferable is " the equilateral quadrangle of arc ", is the quadrangle that same four convex surfaces constitute towards the arc limit, shown in accompanying drawing 5 right sides.The socket shape filter leaf that such shape is arranged, good rigidly, filter area is big, and the volume that occupies is little.
The pipeline that charges into high-pressure fluid to capsule can be assemblied in the bottom of capsule, also can be assemblied in the top.The pipeline of discharging black liquor is assemblied in the bottom of filter leaf, but is assemblied in the shell, the also saturating liquid of perforate of the duct wall that is communicated with filter leaf, makes it have the function of filter leaf concurrently.Assembling pipeline in filter leaf top communicates with compressed air and washing pulp source.When extracting black liquor, the solidliquid mixture that is pressed into is slurry and the raw black liquid that boiling produces, and the filtrate that enters in the filter leaf is raw black liquid, and filter residue is the slurry cake that contains black liquor.After the strong force squeezing slurry cake, can feed compressed air, raw black liquid residual in the filter leaf be blown down clean from the filter leaf top.Then, cutoff high fluid source; Open fluid circuit in the discharging capsule; Close and discharge the black liquor pipeline; Pump into washing pulp again, can pump into washing pulp from the filter leaf top, washing pulp enters the slurry cake, and in the reduction paste cake, expulsion bladder around the capsule pushes away fluid in the capsule from delivery pipe; After the fluid discharging totally, open the conical bottom slag notch in the capsule, pump into washing pulp, slurry and liquid are discharged from slag notch.
When charging into the capsule strong force squeezing slurry cake of high-pressure fluid, high-pressure fluid source pressure is high more, and the amount that squeezing removes raw black liquid is many more.In laboratory scale, when the pressure of high-pressure fluid surpasses 15Mpa, only take turns strong force squeezing through one, reach the extraction rate of black liquor more than 90%.But during industrial implementation, composite factor considers, can adopt two to take turns even the mode of three-wheel strong force squeezing, improves extraction rate of black liquor.
Second to take turns strong force squeezing be from above-mentioned " pumping into washing pulp again ", and washing pulp herein is rare black liquor that follow-up pulp washing step produces.Go out the raw black liquid amount according to strong force squeezing, control pumps into the amount of washing pulp; In the time can not pumping into washing pulp again, close and pump into pipeline, open and discharge the black liquor pipeline, in capsule, charge into high-pressure fluid once more, carry out second according to first round strong force squeezing step and take turns strong force squeezing.Second takes turns the black liquor that strong force squeezing goes out is diluted by washing pulp, and the concentration ratio raw black liquid is rare.First and second is taken turns after black liquor that strong force squeezing goes out mixes, and can concentrate by Silvola recovery and burn.The extraction rate of black liquor of two-wheeled strong force squeezing can reach 90%.
Second take turns strong force squeezing after, pump into washing pulp from " part filter leaf " top again, discharge the rare black liquor after the detergent milk cake from " another part filter leaf " bottom, replace pulp washing.Used washing pulp reach a certain amount of after, just can carry out strong force squeezing; Then, use clean washing pulp instead, it is enough few to be washed till in the slurry solid content, and behind the strong force squeezing, with cleaner washing pulp reduction paste cake, slurry mixture is discharged from grout outlet once more.Used washing pulp can be rarer black liquor that follow-up displacement pulp washing process is discharged, and wherein can also contain the clear liquid that comes out through lignin precipitating reagent processing black liquor, Separation of Solid and Liquid, can be recycle-water, also can be fresh water.
When " extracting the black liquor machine " extraction of the present invention and processing black liquor, also can behind first round strong force squeezing, discharge in the operation of slurry, quantitatively pump into and be no more than 15m at filter
3The washing pulp of/ton slurry is for example by 8～12m
3The amount of/ton slurry, the reduction paste cake makes slurry mixture discharge from the grout outlet of conical bottom.Washing pulp is derived from rarer black liquor that the next round pulp washing produces.Then, again the slurry mixture of discharging is pressed into filter, carries out second and take turns press filtration and strong force squeezing.Rare black liquor total amount that press filtration and strong force squeezing go out equals to pump into the amount of washing pulp, so can claim " displacement pulp washing ".Rare black liquor is handled with the lignin precipitating reagent, precipitate lignin as lignin acidizing separation or with calcium chloride, use the pressure filter Separation of Solid and Liquid in inventor's utility model application again, burn behind the isolated solid drying, the reuse of isolated clear liquid preparation cooking liquor, unnecessary clear liquid can and in the washing pulp of next round.
According to second method of taking turns " displacement pulp washing ", carry out third round press filtration and strong force squeezing fully.The washing pulp that pumps into is the recycle-water that clear water or subsequent step are sent here, may also will add above-mentioned unnecessary clear liquid.Rarer black liquor that press filtration and strong force squeezing go out uses as the washing pulp of previous round.Then,, pump into the recycle-water of clear water or subsequent step, slurry mixture is discharged from slag notch, finish and extract black liquor and displacement pulp washing according to preceding method.Extract black liquor and displacement pulp washing through three-wheel, the not enough total amount of the black liquor solid of carrying secretly in the slurries 2% or still less.All the other solid contents or in the raw black liquid that extracts press the Silvola recovery burning, or in isolated solid, are incinerated after the drying.So just accomplish to produce one ton of slurry, 30 kilograms of the black liquor solid deficiencies of generation.
Filter area is the important parameter of ratings filter function.In cylindrical housing, with the filter leaf of the hollow capsule coupling of pressing equilateral triangle or square arrangement, quantity is restricted, and filter area is restricted.For increasing filter area, do not increase the space that filter leaf occupies, can reduce the diameter of tubular filter leaf, increase the number of filter leaf.For this reason, filter leaf can be intervally arranged with the concentric face of cylinder of shell on, determine to arrange the number of plies of filter leaf again by the face of cylinder according to housing diameter, can in 2～8 layers, select.The filter leaf diameter can be selected in 10～150mm scope; Interval with adjacent filter leaf wall in one deck is selected in 5～100mm scope.
Hollow capsule is the flexible rubber bag, is arranged between the face of cylinder that filter center, filter leaf form and between filter leaf and the outer casing inner wall.After charging into high-pressure fluid in the capsule, many between capsule and filter leaf with the slurry cake, few for well between adjacent bladders, for this reason, be less than the hollow capsule center with the centre distance of adjacent bladders in one deck and arrive two times of filter leaf outer wall distance.In addition, also two or more adjacent bladders can be associated in together, make the slurry cake that gathers between the adjacent bladders the least possible.
In the shell of Any shape, the best matching way of hollow capsule and filter leaf is to combine, and becomes a unit block, and this assembly is made up of the capsule of projection by being enclosed within outer filter cloth of capsule and surface.When making the rubber hollow capsule, do projection, particularly hard rubber projection at the cyst wall outer surface; As supporting, support filter cloth with projection, make between the outer surface of capsule and the filter cloth and form filtrate channel, have the function of filter leaf.The shape of projection can be that cylinder, round platform, section are square or trapezoidal rectangular etc.
Such unit block is pressed arrangement mode the most closely, arranges as equilateral triangle, is assemblied in the filter.During pressure filtration, filtrate penetrates filter cloth and enters filtrate channel, and filter residue still applies external pressure to filter cloth outside filter cloth, exerts pressure to assembly exactly, forces cyst wall superimposed.When strong force squeezing filtered, capsule volume expanded, lip-deep projection extruding filter cloth, and filter cloth extruding slurry cake is discharged after the filtrate in the slurry cake enters filtrate channel.Assembly has hollow capsule and two kinds of functions of filter leaf concurrently.
Use such unit block, favourable part is a washing leaching cake; " for extracting the black liquor machine ", replace pulp washing exactly.For this reason, need be in " part assembly ", the top of black liquor passage is communicated with the washing pulp source by pipeline, valve in the assembly; And the pipeline of " this part assembly " being discharged black liquor separates with the discharge black liquor pipeline of " remaining component ", can control respectively and open, closes.Strong force squeezing, open and discharge in the capsule behind the fluid line, close the discharge black liquor pipeline of " this part assembly ", be pressed into washing pulp from the top again, washing pulp can only penetrate filter cloth, is penetrated in the slurry cake dipping slurry cake, detergent milk cake; Depressor forces fluid discharge in the capsule simultaneously, and is superimposed until cyst wall.Open " remaining component " and discharge the black liquor pipeline, the cleaning solution after the detergent milk cake penetrates the filter cloth on " remaining component ", enters its black liquor passage, discharges along discharging the black liquor pipeline.Notice that the washing pulp of discharge floods, washed the slurry cake, is transformed into rare black liquor; Slurry is original in the cake is replaced by rare black liquor than concentrated black liquid, has finished displacement pulp washing process.According to technological requirement, can stop to be pressed into washing pulp at any time, stop to replace pulp washing.Carry out strong force squeezing again, then, discharge the slurry mixture of having cleaned from grout outlet again.In addition, can substitute any in said " part assembly " and " remaining component " with filter leaf.
" extraction black liquor machine " carries out the efficient of above-mentioned displacement pulp washing, be subjected to the influence of the arrangement mode of shell shape, element shapes and assembly.Efficient makes up preferably, the plate shaped assembly that square tube shape shell cooperates parallel plate type to arrange; Perhaps cylindrical housing cooperates ring-shaped component or the circular arc assembly that concentric-ring pattern is arranged.Make such assembly, need to use the hollow capsule of a plurality of hollow space combinations, or perhaps a plurality of hollow capsules of cyst wall connection.
Referring to attached Fig. 1 and 2, shown in " extract black liquor machine " shell be cylindrical shape, the conical end socket and the end, arranged.The diameter 180cm of shell, height overall 680cm, the high 540cm of cylinder, the high 50cm of end socket, the high 90cm of conical bottom, volume surpasses 12m
3, 8 tons of gross weights.Shell, end socket and conical bottom all are to be made of the thick carbon steel thin plate of 25mm, can bear in the 3.0Mpa and press.Conical end socket and center, the end have the slurry mixture entrance and exit of internal diameter 80mm respectively; Inlet duct has valve 1,2 and 3, and valve 1 fits over from inlet the most nearby, valve 2 control slurry and raw black liquids, valve 3 control slurry and rare black liquor.The slurry outlet conduit has valve 4,5 and 6, and valve 4 fits over from outlet the most nearby, delivers to screening by the slurry mixture of valve 5, and the slurry mixture by valve 6 enters medial launder, but the black liquor machine is extracted in blowback.The black liquor pipeline total valve 7 and the pipeline between the filter leaf that communicate with filter leaf are short as far as possible, and the black liquor by valve 8 advances the black liquor groove, and it is stand-by that the rare black liquor by valve 9 advances medial launder.Pipeline between total valve 10 and the filter leaf top is short as far as possible, and valve 11 and 12 is controlled washing pulp and compressed air respectively; Compressed air source is common 1.2Mpa air compressor machine.Valve 13 and 14 control respectively to hollow capsule charge into, from hollow capsule discharge currents body, high-pressure fluid source is the centrifugal multistage pump multiple centrifugal pump of pressure head 300m or pump pressure 3.0Mpa." extract black liquor machine " like this through one take turns strong force squeezing after, the quantity not sufficient 2m of residue raw black liquid in the slurry
3/ ton air dried pulp.
Interior structure and the strong force squeezing principle of shell that accompanying drawing 2,3 and 4 signals " are extracted the black liquor machine ".At first the explanation, outer casing inner wall, again cover filter cloth and the part filter area that support constituted therebetween in the drawings the expression, do not forget about this part filter area.In addition, sequence number 28 expressions in the accompanying drawing 2 are supported, and it supports annular and discharges black liquor pipeline 21.In the accompanying drawing 2 and 3,15 indication cylindrical housings, 16 refer to end socket, and 17 refer to conical bottom, and 18 refer to slurry and raw black liquid inlet, and 19 refer to the grout outlet of conical bottom.Slurry and raw black liquid mixture enter in the shell from 18, and be mobile naturally, be distributed between the hollow capsule 25 and filter leaf 20 of annulus arrangement, and between outermost layer hollow capsule and the outer casing inner wall.Filter leaf 20 by porous, diameter is by the 20mm seamless steel pipe and overlapped filter cloth and constitute, 80 of total quantitys, its spacing is 40mm, to moving without any obstruction of slurry mixture.In the accompanying drawing, the compressed air of 23 indications and washing liquid lines are annulars and are fitted in the top; The high-pressure fluid pipes of 26 indications also is an annular, is fitted in the top, and not overslaugh slurry mixture moves.Again referring to accompanying drawing 4, hollow capsule 25 is subjected to starching the external pressure with raw black liquid, and cyst wall is superimposed, and its shape is shown in innermost layer in the accompanying drawing 4; Its arrangement mode has enough spaces between the adjacent bladders as shown in accompanying drawing 3, move freely NATURAL DISTRIBUTION for slurry mixture.Be full of whole " extracting the black liquor machine " up to slurry and raw black liquid mixture, open after the valve 7 and 8 in the accompanying drawing 1, the raw black liquid that penetrate filter cloth, enters in the filter leaf flow to the black liquor groove along pipeline.Continuation is pressed into slurry and raw black liquid from inlet, up to not being pressed into slurry and raw black liquid again, does not also have more raw black liquid to flow to the black liquor groove.So far, finished the pressure filtration step, the power source that leaches raw black liquid is to be pressed into the slurry and the pressure of raw black liquid, and it is the peak of casing internal pressure, and the size of this pressure has determined to starch in the slurry cake and the ratio of raw black liquid, generally is 3.5～4.5m
3Raw black liquid/ton air dried pulp.
Accompanying drawing 4 is sectional schematic diagrams of flexible hollow capsule.Its innermost layer represents to be subjected to the hollow capsule of external pressure, and cyst wall is superimposed, forms four pages of double-deck thin slices linking together, and the volume that occupies is very little, be the entity cyst wall volume and.Its intermediate layer dots, and is to charge into fraction fluid, the shape that capsule volume has expanded in the capsule.Its outermost layer is a broken circle, and expression is full of fluid in the capsule, and interior pressure is greater than external pressure, and capsule relies on self being kept perfectly property of intensity air-tight state.In " extract black liquor machine ", the strong force squeezing step from start to finish, hollow capsule can not reach " above-mentioned state " forever, can only reach underfill high-pressure fluid in the capsule, external pressure just weighs with interior pressing, can not charge into the state of high-pressure fluid again.
Close the valve 1 in the accompanying drawing 1, open valve 13, maximum pressure be the water of 3.0Mpa through piping 27 and 26, charge into each hollow capsule.Hollow capsule amounts to 44, and four layers number is respectively 1,7,14 and 22.Hollow capsule section girth 630mm, wall thickness 3mm.Follow capsule volume to expand, the slurry cake is subjected to strong force squeezing, and raw black liquid is wherein discharged after constantly penetrating filter cloth; Pressure in each capsule all reaches 3.0Mpa, and the amount of raw black liquid is still greater than 1.3m in the slurry cake
3Raw black liquid/ton air dried pulp is about 1.7m
3Left and right sides raw black liquid/ton air dried pulp, capsule also can not reach " above-mentioned state ".Then, open valve 10 and 12 in the accompanying drawing 1, compressed air enters filter leaf along pipeline in accompanying drawing 2 and 3 23 and 24, discharges through piping 7 and 8, simultaneously the raw black liquid in the pipeline is blown down clean.
Then carry out second and take turns the extraction black liquor.Close the valve 13,12 and 7 in the accompanying drawing 1, open valve 14 and 11; The washing pulp that pumps into enters filter leaf through pipeline 24 and 23 in the accompanying drawing 2 and 3 from the top.After opening valve 14, the capsule inner fluid can be discharged by pipeline 26 in the accompanying drawing 2 and 27; The penetrable filter cloth of washing pulp in the filter leaf is penetrated in the slurry cake.As long as the pressure of washing pulp equates just have the capacity washing pulp to be penetrated in the slurry cake with the pressure that is pressed into slurry and raw black liquid, the feasible slurry starched in the cake and the ratio of black liquor reaches ratio after the pressure filtration; Simultaneously, the fluid in the capsule is pushed away, make capsule return to the superimposed state of cyst wall.In order to guarantee that really capsule returns to the superimposed state of cyst wall, from capsule, to discharge in the fluid line, the port of export of valve 14 can be communicated with the evacuated fluid medial launder of energy in the accompanying drawing 1, guarantees noresidue fluid in the capsule, and cyst wall is fully superimposed.
Then, close valve 11 in the accompanying drawing 1, stop to be pressed into washing pulp; Valve-off 8 is opened valve 7 and 9, filter leaf and with it in the connecting pipe, the washing pulp that is not penetrated in the slurry cake is discharged into rare black liquor groove by valve 7 and 9, and is stand-by.Can open valve 12 again, with compressed air washing pulp be blown down totally, again valve- off 12 and 10.
Valve-off 9 is opened valve 8; Valve-off 14 is opened valve 13, charges into high-pressure fluid once more in capsule, carry out second and take turns strong force squeezing, be penetrated into rare black liquor that the cleaning solution of slurry in the cake be transformed into and enter filter leaf, flow to the black liquor groove through valve 8 along discharging the black liquor pipeline, mix with raw black liquid, send the alkali recycling.Pressure in each capsule reaches 3.0Mpa, and after again strong force squeezing did not go out rare black liquor, the amount of rare black liquor was at 1.7m in the slurry cake
3About/the ton air dried pulp.
Valve-off 13 is opened valve 14; Valve-off 7; Open valve 10 and 11, pump into washing pulp once more, up to washing pulp infiltration slurry cake, and force in the capsule fluid to be discharged along pipeline, cyst wall returns to closed state.Then, open the valve 4 and 5 in the accompanying drawing 1, slurry mixture is discharged after, send screening.Perhaps open valve 6, valve-off 5, slurry mixture is discharged into medial launder, carries out pulp washing again.
Take turns in the process of extracting black liquor second, be penetrated in the slurry cake, the pulp washing liquid measure of dipping slurry cake is greater than raw black liquid amount in the slurry cake.Through infiltration, dipping, concentration evenly after, the shared ratio of rare black liquor amount that goes out of strong force squeezing, second extraction rate of black liquor of taking turns exactly again.Second extraction rate of black liquor of taking turns is higher than 50%, between 60～70%.Extract black liquor through two-wheeled, total recovery rate surpasses 90%, and the concentration of extracting black liquor is near 90% of raw black liquid concentration.
One end of length 400mm, the diameter 200mm lengths of steel pipes flange ring of burn-oning, the sealing flange blind plate of joining thickness 12mm; The other end is burn-on at the bottom of the thickness 12mm steel plate, forms the cylindrical shape sealing shell of about 10 liters of volume.Perforate welded tube at the bottom of the shell is as discharging the black liquor pipeline.Be welded into cylindrical cage with diameter 3mm round steel, two-layer round steel is all arranged at the bottom of cage wall and the cage; The cage shell of can just packing into, the cage wall outside is adjacent to outer casing inner wall.Make cylindrical shape with 80 order filter clothes, the suit cylindrical cage constitutes filter leaf; But the liquid free penetrating filter cloth in the slurry mixture is discharged at the bottom of shell, and the slurry cake can only be stayed in the shell.Be bonded into hollow capsule with the rubber inner tube material, can take the whole spaces in the shell behind the capsule sufficient gas.At blank flange center drilling welded tube, the air inlet of inboard pipe end and capsule connects, and outside pipe end communicates with air compressor machine.Other perforate welded tube enters shell for slurry mixture on the blank flange.Be assembled into the strong force squeezing filter that filter leaf and rubber hollow capsule are arranged in the rigidity sealing shell.
Straw Pulp that boiling goes out and the slurries of black liquor ratio are 8.5～9m
3Raw black liquid/ton air dried pulp.In its above-mentioned shell of packing into, need not pressurize in addition, black liquor can ooze out from shell bottom tube road.Replenish the slurry mixture of packing into, very slow up to the speed of oozing out black liquor, sealing slurry mixture inlet.At this moment, liquid is starched ratio greater than 6m in the slurry mixture in the shell
3Black liquor/ton oven dry stock.Charge into compressed air with air compressor machine to hollow capsule, make capsule strong force squeezing slurry cake, the raw black liquid of squeezing out, the raw black liquid pipeline at the bottom of the shell is discharged; Strong force squeezing is very slow to the speed of discharging black liquor, stops to charge into compressed air in compressed air and the emptying capsule again.Then, open blank flange, take out the slurry cake, weigh; Slurry cake after weighing is clean with massive laundering, and oven dry is weighed again; According to twice data of weighing, calculate the amount of raw black liquid in the slurry cake behind the strong force squeezing.The pressure of control air compressor machine is respectively 0.5,1.0 and 1.2Mpa, carries out strong force squeezing and extracts black liquor, and gained the results list is as follows.
Pressure Mpa 0.5 1.0 1.2
Black liquor (gram)/oven dry stock (gram) 2.9 2.4 2.2
Comprehensive accompanying drawing, above embodiment, and the character narrate of specification, art technology colleague readily understands thinking of the present invention, and can implement technology contents of the present invention.Any concrete ins and outs described in specification and the embodiment, all effect of invention scope not being defined; Protection scope of the present invention is defined by the claims.
Claims (9)
1. a squeezing leaf filter is made up of filter leaf in pressure-bearing outer rigid housing and the shell, is used to extract black liquor or displacement pulp washing, it is characterized in that,
Filter leaf is arranged at interval, disposes hollow capsule therebetween, and filter cake accumulates between hollow capsule and the filter leaf; Hollow capsule is subjected to external pressure, and cyst wall is superimposed, and the volume that occupies is very little; When squeezing, charge in the hollow capsule high-pressure fluid by cyst wall towards periphery all directions exert pressure the squeezing filter cake; Follow the hollow capsule fluid pressure to increase, capsule volume increases, its volume and be greater than 1/2nd of the interior space of filter at least.
2. the described squeezing leaf filter of claim 1 is characterized in that, wherein said pressure-bearing outer rigid housing inner wall surface is covered filter cloth again, and support is arranged therebetween, and filter cloth and inner wall surface constitute filtrate channel, forms filter area, also belongs to filter leaf.
3. the described squeezing leaf filter of claim 1 is characterized in that, at the bottom of the wherein said pressure-bearing outer rigid housing slag notch is arranged; The equipped filtrate pipeline of discharging of filter leaf, equipped compressed air and washing liquid lines; After filter cake squeezed through the hollow capsule that charges into high-pressure fluid, preface was used the compressed air and the washing liquid lines of filter leaf assembling successively, fed compressed air and blew down the interior residue filtrate of filter leaf; Feed cleaning solution, washing leaching cake; Feed compressed air or cleaning solution and clean filter cloth, perhaps blow,, the slag notch of filter residue at the bottom of the shell discharged towards filter residue.
4. the described squeezing leaf filter of claim 1 is characterized in that, wherein said pressure-bearing outer rigid housing comprises circular cylindrical shell and end socket; Hollow capsule is a starting point with the central shaft in filter, presses equilateral triangle or square arrangement, and filter leaf is arranged in equilateral triangle or square center; Filter leaf is that section is round, the equilateral tetragonal socket of arc equilateral triangle or arc, the saturating liquid of perforate on the wall.
5. the described squeezing leaf filter of claim 1, it is characterized in that, wherein said pressure-bearing outer rigid housing comprises circular cylindrical shell and end socket, filter leaf is a cylindrical shape, filter leaf be intervally arranged with the concentric multilayer face of cylinder of shell on, the filter leaf diameter is between 10～150 millimeters, and between 5～100 millimeters, the number of plies of filter leaf is between 2～8 layers with the interval of adjacent filter leaf wall in one deck.
6. the described squeezing leaf filter of claim 1, it is characterized in that, wherein said filter leaf and hollow capsule are combined into unit block, in this assembly, filter cloth is enclosed within outside the hollow capsule, filter cloth and hollow capsule outer surface and support therebetween constitute filtrate channel, and said support is the intensive projection on the hollow capsule outer surface.
7. the described squeezing leaf filter of claim 3 is characterized in that, the valve that has control to open or close on the discharge filtrate pipeline that wherein said filter leaf is equipped with, the valve that also has control to open or close on the washing liquid lines that filter leaf is equipped with; When washing leaching cake, the washing liquid lines of part filter leaf is open-minded, discharges the filtrate closedown of pipeline, and simultaneously, the washing liquid lines of another part filter leaf is closed, and discharge filtrate pipeline is open-minded; Make the cleaning solution that pumps into penetrate filter cloth from the part filter leaf, enter filter cake, washing leaching cake enters another part filter leaf again, discharges along discharging the filtrate pipeline.
One kind extract black liquor or the displacement pulp washing method, it is characterized in that this method comprises:
(1) will starch and the black liquor mixture is pressed into the press type leaf filter, filter leaf is arranged at interval in the filter, disposes hollow capsule therebetween, the slurry cake accumulates between hollow capsule and the filter leaf, and hollow capsule is subjected to external pressure, and cyst wall is superimposed, the volume that occupies is very little, behind the long-pending full filter of slurry cake, closes inlet;
(2) in hollow capsule, charge into high-pressure fluid, high-pressure fluid by cyst wall towards periphery all directions exert pressure, the squeezing filter cake, the black liquor in the filter cake enters filter leaf, discharges along pipeline; Follow the hollow capsule fluid pressure to increase, capsule volume increases, and its volume is bonded to and is greater than 1/2nd of the interior space of filter less;
(3) fluid pressure that charges in the hollow capsule can not improve again, in the time of can not squeezing out black liquor again, compressed air is fed filter leaf, blows out residual black in it;
(4) open the pipeline of discharging hollow capsule inner high voltage fluid, pump into the washing pulp of controlled quentity controlled variable again, washing pulp pushes away fluid in the hollow capsule, washing pulp enters, floods, washs, penetrates filter cake simultaneously, be transformed into rare black liquor, rare black liquor enters filter leaf, discharges along pipeline;
(5) in hollow capsule, charge into high-pressure fluid once more, the squeezing filter cake, the rare black liquor in the filter cake enters filter leaf, discharges along pipeline.
9. the method for described extraction black liquor of claim 8 or displacement pulp washing is characterized in that,
The wherein said washing pulp that pumps into comprises:
(1) in follow-up displacement pulp washing step, from discharging rarer black liquor that the black liquor pipeline is discharged;
(2) handle black liquor through the lignin precipitating reagent, again the clear liquid that goes out of Separation of Solid and Liquid;
(3) recycle-water or fresh water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031370683A CN1182907C (en) | 2003-06-18 | 2003-06-18 | Strong expression blade type filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031370683A CN1182907C (en) | 2003-06-18 | 2003-06-18 | Strong expression blade type filter |
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|---|---|
| CN1460532A CN1460532A (en) | 2003-12-10 |
| CN1182907C true CN1182907C (en) | 2005-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031370683A Expired - Fee Related CN1182907C (en) | 2003-06-18 | 2003-06-18 | Strong expression blade type filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416704A (en) * | 2011-07-26 | 2012-04-18 | 宜兴能达环保科技有限公司 | Water-contained material pressing and dehydrating method and device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103405953B (en) * | 2013-08-30 | 2015-05-20 | 重庆三温暖电气有限公司 | Filter press |
| CN103550966B (en) * | 2013-10-30 | 2015-11-18 | 广州市新之地环保产业有限公司 | A kind of method of operating of diaphragm filter press |
| CN103990315B (en) * | 2014-03-10 | 2016-06-01 | 重庆代利妮特环保技术开发有限公司 | A kind of capsule-type equipment for separating liquid from solid and method |
| CN104225985B (en) * | 2014-09-24 | 2016-03-09 | 广东翔俊环保设备有限公司 | A kind of high pressure filter-pressing device |
| CN107596745A (en) * | 2017-10-30 | 2018-01-19 | 佛山市金凯地环保工程有限公司 | A kind of air blowing type filter press plate with lines formula filtration |
-
2003
- 2003-06-18 CN CNB031370683A patent/CN1182907C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416704A (en) * | 2011-07-26 | 2012-04-18 | 宜兴能达环保科技有限公司 | Water-contained material pressing and dehydrating method and device |
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| CN1460532A (en) | 2003-12-10 |
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