CN101234269A - Planet gyration small circular cylinder continuous pressure filtration machine - Google Patents
Planet gyration small circular cylinder continuous pressure filtration machine Download PDFInfo
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- CN101234269A CN101234269A CNA2007100504944A CN200710050494A CN101234269A CN 101234269 A CN101234269 A CN 101234269A CN A2007100504944 A CNA2007100504944 A CN A2007100504944A CN 200710050494 A CN200710050494 A CN 200710050494A CN 101234269 A CN101234269 A CN 101234269A
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Abstract
The invention relates to a continuous pressure filter used for filtering suspension, the main technical characteristics of which is that a plurality of filtering units are arranged in the direction of the inner circumference inside a shell body of the filter; each filtering unit consists of a filter cylinder, a filter axis and an inner channel of a planet carrier communicated with the filter axis. The filter cylinder used as a filter element is fixed and supported on the planet carrier by the filter axis, which executes a planetary motion when working; fluid is collected inside the filter cylinder after going through a filter medium on the filter cylinder, which enters the channel of the planet carrier through a hollow filter axis and is discharged after being switched through a distributing head. The continuous pressure filter of the invention has the main characteristics of high-efficiency filtration dehydration, effectively wash and dry a filter cake, reliable material-discharging way, a blowback regeneration function of the filter medium, and the operating steps are carried out sequentially.
Description
Technical field
The present invention is a kind of novel solid-liquid separating equipment, relate to the gas pressure is that filtered driving force carries out the filter that continuous filtration separates to suspension, essential characteristic with continuous high-efficient operation, be particularly suitable for the production of sad filter material, large chemical industry and petroleum chemicals, technological process condition harshness, also be suitable for the production of food, biological products, medicine and other valuable chemicals.
Technical background
In theory, the filtered driving force of pressure filtration is unrestricted, and because its significant advantage makes its application on isolated by filtration very extensive.The filtered driving force of pressure filtration has been broken through the limited bottleneck of vacuum filtration motive force, have advantages such as intensity filter height, production capacity are big, the filter cake moisture content is low, and process equipment is simple, flow process is short, operating cost is low, original equipment cost and overhaul of the equipments expense are low.In recent decades, because the tremendous development of science and technology is also more and more higher to the requirement that separates, each state all satisfies the more and more separation condition of harshness seeking a kind of more efficient, reliable and green continuous pressing filter.
" fluid engineering " magazine 1993 the 5th is interim ' has introduced the continuous pressing filter of a kind of KDF of being called of Dutch Amafilter company invention in the development of KDF continuous filter press and application ' one literary composition, this filter is a horizontal type structure, in horizontal housing, settle airtight gear-box and small pressure case, the several hollow filters that can revolve round the sun and can rotation are installed simultaneously spool at the gear-box output.Final drive shaft links to each other with gear-box power is passed to the filter axle.Vertical several small offence filter disks of installing are as filter element on the filter axle, and filter disc is done planetary motion with the filter axle.The centre bore of filter axle communicates with filtrate channel, and the other end of filtrate channel connects filtrate valve.Central space at the filter housing is provided with the filter residue conveying device, and the outlet of conveying device is connected with the deslagging controlling organization.During the work of KDF filter, feed compressed air in the housing, keep the constant filter pressure in kiln basin top.Hollow filter axle public affairs in the filter housing circle, and finish processes such as filtration, dehydration, blowback discharging successively, simultaneously because the filter cake that the rotation of filter axle makes filtration stage form is even.Filter disc is with filter axle not only rotation but also revolve round the sun, and periodically enters and exposes kiln basin, and when the filter axle was immersed in the slip, under the compressed air effect, the filter medium that liquid phase is passed on the filter disc entered in the filter axle, by connecting the filtrate channel eliminating of filter axle and filtrate valve.Filtrate valve is installed in the filtrate channel end and communicates with atmosphere.In dehydration, air and filtrate are discharged through same passage.During whole filtration and dehydration, filtrate valve one is heading straight for, and filtrate flows under the influence of gravity in the collector tube, and isolated air is then discharged by blast pipe.When the filter axle goes to peak, filtrate valve is closed, back-flushing valve is opened, compressed air is entered in the filter disc by hollow shaft by the internal pressure case, fall in the hopper of installing in the same way with housing from the other direction filter cake being blown off, transport in the drainage conduit of deslagging controlling organization by the filter residue conveying device then, finish discharging at last.The KDF continuous pressing filter has adopted many new methods for designing and thinking, for huge contribution has been made in the research and development of novel filter, but the filter of this type still exists many shortcoming and defect: the purge gas discharging is adopted in discharging, discharge way is single, have unreliability, and the tendency that makes filter cake moistening is again arranged; The unit filter area is less on the pressure housing cross section; Complex structure, the accuracy of manufacture height of requirement.
January calendar year 2001 " Filtration; Separation " magazine ' introduced the characteristics and the application of the rotary pressure filter (RPF) of German BHS company in the Improving Process Operations with a RotaryPressure Filter ' literary composition.This type is separated into rotary drum a series of equal sizes, is similar to the element cell of funnel as filter element on periphery.Adjacent element cell is separated with bar shaped baffle plate and adapter ring.Be parallel to the cross section position of rotary drum in each element cell bottom, all be equipped with one and filter plug-in unit.Filter the plug-in unit top and cover one deck filter medium, the below closely is connected with the filtrate discharge system.The last sheaf space of element cell Inner filter net is the tip of filter cake, and its height can be regulated by the position of filtering plug-in unit.Rotary drum rotates in the tubular frame continuously, and cylinder is by the inside and outside two-layer annular gap structure that constitutes, and is formed in sealed at both ends connection by sealing shroud or similar material.It is characterized in that: the separation dividing plate of series of parallel in rotating shaft is installed on cylinder wall, the cylinder mezzanine space is separated into airtight one by one separate chamber, suspension, cleaning solution and dry gas enter the unit in-house operation by different separate chamber respectively.Rotation along with rotary drum during the operation of RPF filter can be divided into five steps in a circumferential direction: be pumped into suspension, under pump function, element cell inner filter media top forms filter cake, and the filter medium below forms filtrate; The element cell that forms filter cake enters under the rotation of rotary drum drives slightly washes the district, and washing lotion is the wash filtrate from the next stage washing; Add pure cleaning solution, the filtrate in cleaning filter cake, the former filter cake of displacement is also collected and is kept supplying one-level washing use; Utilize Compressed Gas to carry out drying, Compressed Gas blows out the filtrate in the filter cake to collect in the first order washing procedure and uses after condensation, and the gas of discharge enters air-washer and handles; Feed Compressed Gas from the filter screen back side, filter cake is blown out from element cell, make filter medium regeneration when unloading filter cake.The application of RPF rotary pressure filter is comparatively extensive, but its seal life-span easy to wear is short; During filtration, the influence that the full condition of filter cake in element cell crossed the filtration operation is very big, if the filter cake underfill element cell that forms, also remaining the having living space in interior top, will between this working region and adjacent area, produce interference, especially unfavorable when it occurs in final stage washing zone, moisture content can enter into dry section from washing the zone, influences filter effect; Cost an arm and a leg simultaneously, patented technology has foreign corporation to grasp.
Summary of the invention
The objective of the invention is to avoid the deficiency on the prior art, provide a kind of simple in structure, disposal ability is big, cake dewatering washing good separating effect, operation continous-stable are reliable, and a kind of new type of continuous pressing filter easy to maintenance is made, used to economical operation.
Main technical points of the present invention is that filter element is the filter cylinder 10 of big L/D ratio, filter cylinder 10 connects support by filter axle 9, and it is inner by 41 connections of filter axle centre bore, and be communicated with filtrate channel 30, filter cylinder 10 around final drive shaft 28 axis rotations (i.e. revolution), is made spinning motion around self axis simultaneously under the drive of final drive shaft 28.Filtrate is collected the back enters into filter axle 9 by the filter cylinder central tube 38 of filter cylinder 10 inside filter axle centre bore 41, and then enter in lattice rotary drum 32 chambers of planet carrier 6 by the through hole 40 of filter axle centre bore one end, be communicated to two dispensing heads by filtrate channel 30 again and switch the back and discharge.Quiet dispensing head 2 forms end face seal with moving dispensing head 29 junctions by moving cross gas plate 19 and 20 two end faces of quiet cross gas plate, because there is pressure differential in the filtering casing inside and outside, thereby makes cross gas plate 19 be adjacent to the formation end face seal automatically with quiet cross gas plate 20 relative both ends of the surface.Quiet dispensing head 2 is fixedly mounted on the bearing block 3.
Realize the object of the invention planet gyration small circular cylinder continuous pressure filtration machine, it comprises: the filtrate switching device shifter that moving dispensing head 29, quiet dispensing head 2 and the moving cross gas plate 19 that is connected with two dispensing heads, quiet cross gas plate 20 constitute, bearing block 3, the pressure housing that is made of end socket 4,11 and cylindrical shell 7, planet carrier 6, filter element filter cylinder 10, filter spools 9 and shedding mechanism etc.Shedding mechanism is installed in the central authorities of actionless pressure housing end socket 11 by the groove 16 that connects material, groove 16 tops arrangement unloader knife 25 connects material, connecting material in the groove 16 is an auger conveyor 12, the filter cake that scraper unloads is transported to drainage conduit 14 under the rotation of spiral, under the gravity effect, enter drainage conduit 14, drainage conduit 14 belows connect an intelligent unloading controller 15 (can buy intelligent unloading controller directly installs), when keeping the pressure housing internal pressure, filter cake is discharged smoothly, reach the purpose of control discharge.
Realize the object of the invention planet gyration small circular cylinder continuous pressure filtration machine, its planet carrier 6 is an important structure.Lattice rotary drum 32 inside of planet carrier 6 are divided into many lattice, each minute compartment separate, and have filtrate channel 30 to link with it, the passage other end communicates with moving cross gas plate 19.The filtrate that forms enters filter cylinder central tube 38 after filter cylinder 10 is collected, enter in the lattice rotary drum 32 through filter axle centre bore 41 again, enters in the filtrate channel 30 again, further switches the back via cross gas plate and is discharged by quiet distribution head end.Filter axle 9 one ends have planet pinion 39, make it produce planetary motion with sun gear 5 engagements, are convenient to generation, washing filter cakes, drying and dehydrating and the discharging of filter cylinder 10 surperficial filter cakes.Filter axle 9 right-hand members filter axle connects with the filter cylinder axis hole 34 of filter cylinder 10 with filter cylinder connecting section 42, and a filter centre bore 41 is communicated with formation internal filtrate passage with filter cylinder central tube 38, and with 32 interior partitive case space and the 30 corresponding connections of corresponding filtrate channel of lattice rotary drum.
The discharging slagging device is placed in pressure housing right-hand member end socket 11 central authorities by the groove 16 that connects material, groove 16 top openings connect material, the opening side frames is provided with baffle plate 27, is mounted with 2～3 unloader knife at an angle to each other 25 above baffle plate 27, and unloader knife 25 fixed in position are on the groove 16 that connects material.Groove 16 inside that connect material are an auger conveyor 12, and auger conveyor 12 directly drives (or connect with carrier main-body by differential mechanism) by the engine 13 that another rotating speed is different from main revolving body rotating speed.
Intelligent unloading controller 15 is placed in drainage conduit 14 lower ends, and drainage conduit 14 vertically is fixed in groove 16 tail ends that connect material.
When planet gyration small circular cylinder continuous pressure filtration machine of the present invention was worked, pressure housing top was full of compressed air, and the bottom is a kiln basin.Planet carrier 6 is rotation continuously in pressure housing, drives many group filter elements simultaneously and rotates together.Filter cylinder 10 is with planet carrier 6 revolution the time, and around self axis rotation, and the rotation rotating speed is much larger than revolution under the drive of planetary mechanism, and rotating ratio is determined by planetary mechanism.From the cross-sectional periphery of pressure vessel, the operation that filter cylinder 10 public affairs circle can be divided into filtration, washing, dehydration, discharging and filter medium and regenerate these five stages (referring to accompanying drawing 3): in the I stage, filter cylinder 10 rotates to and is submerged in fully in the kiln basin, filters beginning.Filter the filtrate that forms and enter filter cylinder 10 inside, form filter cake on its surface simultaneously.This moment is because the rotation of filter cylinder 10 makes the filtrate effect of the generation of filter cake and formation all fine.When kiln basin was left in filter cylinder 10 revolution, filtration stage was finished.Form the character decision of the thickness of filter cake by filtration time and filtered driving force and filter medium, wherein filtration time is by the radian measure alpha and the planet carrier 6 revolution rotating speed decisions of fillter section; The former can adjust by the kiln basin liquid level, and the latter can pass through final drive shaft 28 rotating speed adjustment, optimizes filter process by the adjustment of two aspects.In the II stage, the washings that washing tank 22 flows out drench on the filter cake on filter cylinder 10 surfaces, and filter cake is washed.In order to reach the sufficient purpose of washing, the condition that the radian measure beta of washing section correspondence need satisfy is to pass through in the times of β radians filter cylinder 10 rotation radians 〉=2 π in planet carrier 6 revolution.In the III stage, the filter cake after the washing is compressed the further dry water capacity that reduces of air.The radian of these stage planet carrier 6 revolution processes is γ.In the IV stage, unloader knife 25 falls into filter cake cutting and connects material groove 16 and be transported to drainage conduit 14 tops by auger conveyor 12.For guarantee on the filter cylinder 10 filter cake fully, totally unload, only there are micro gap in unloader knife 25 working surfaces and filter cylinder 10 surfaces, the radian that the while unloading part distributes in a circumferential direction is δ, filter cake all unloads in the δ radian, and the size of δ and revolution rotating speed, gearratio, scraper quantity are relevant.The V stage, introduce blowback pressure-air blowback filter medium 35 through quiet dispensing head 2, filtrate channel 30 and filter cylinder central tube 38, make it obtain regeneration.The radian of filter medium regenerator section is assigned as ε.The radian in these five stages distributes in 360 ° of scopes of circumference of filter.So go round and begin again, realize the continuous pressure filtration operation.
The operation sequence of planet gyration small circular cylinder continuous pressure filtration machine of the present invention is: 1. pipe valve is ready everywhere; 2. close intelligent unloading controller, make filter inside become confined space; 3. start the engine of main revolving body and conveyor screw; 4. in housing, add slip, feed Compressed Gas simultaneously; 5. start intelligent unloading controller filter residue is carried out discharge control; 6. filter enters normal operating conditions.
Compare with existing type, the present invention adopts the planetary body design, and filter element adopts the filter cylinder and the flexile discharge way of big L/D ratio, comprises stable mechanical doctor discharging, has following outstanding advantage:
1. each filter element revolves round the sun in circumference range, make filter in 360 ° of scopes of enclosure interior, realize continuous operations, allow each filter element finish filtration → washing → dehydration → discharging → sequence of operations such as filter medium regeneration successively, realize continuous operation on the whole.And revolution makes slip fully be stirred, and has avoided the precipitation of material, makes filter operation reliable, stable.
2. the rotation of filter element is at fillter section, and cake layer thickness and structure that the filter cylinder surface is formed all are tending towards even; At washing section, rotation makes the cake layer on the filter cylinder obtain all even omnibearing washing; During discharging, transferring scraper discharging certainly to provides power.
3. discharge way is versatile and flexible, adopts the mechanical doctor discharging to solve the anti-wet tendency of blowback discharging filter cake, and reliable and stable.
4. the pulse cleaning function of filter medium.
These operational sequences are carried out continuously, make these facility that advantages such as disposal ability is big, cake dewatering is effective, stable and reliable operation, suitable abominable condition of work be arranged.
Planet gyration small circular cylinder filter of the present invention also has the advantage of some other aspect.
Description of drawings
Fig. 1 is the structural representation of planet gyration small circular cylinder continuous pressure filtration machine;
Fig. 2 is the section structure schematic diagram of Fig. 1;
Fig. 3 is the operation principle schematic diagram of planet gyration small circular cylinder continuous pressure filtration machine;
Fig. 4 is the planet carrier structure schematic diagram of planet gyration small circular cylinder continuous pressure filtration machine;
Fig. 5 is the cartridge structure schematic diagram of planet gyration small circular cylinder continuous pressure filtration machine;
Fig. 6 is the sectional schematic diagram of the filter cylinder of planet gyration small circular cylinder continuous pressure filtration machine along the A-A cross section;
Fig. 7 is the filter axle construction schematic diagram of planet gyration small circular cylinder continuous pressure filtration machine.
Description of reference numerals
1---gear reduction provides power by the main revolving body that connects for filter with main shaft;
2---quiet dispensing head connects the switching device shifter of the filtrate when being filter work by bolt and bearing block 3;
3---bearing block, be used for fixing quiet dispensing head, support planet carrier simultaneously, and it is good in neutrality to guarantee that the moving dispensing head of planet carrier left end and quiet dispensing head have;
4---end socket, pressure housing part;
5---sun gear is a ring gear or external gear;
6---planet carrier;
7---cylindrical shell, pressure housing part;
8---seal, seal, filtrate and slip are separated, guarantee filtration pressure difference;
9---the filter axle;
10---filter cylinder, filter element;
11---end socket, pressure housing part;
12---auger conveyor;
13---motor, for auger conveyor provides power;
14---drainage conduit;
15---intelligent unloading controller;
16---groove connects material;
17---bearing;
18---feed pipe;
19---moving cross gas plate;
20---quiet cross gas plate;
21---the washing lotion inlet tube;
22 wash tank;
23---compressed vapour (or air) inlet tube;
24---Pressure gauge;
25---unloader knife;
2---watch window;
27---baffle plate;
28---final drive shaft;
29---moving dispensing head;
30---filtrate channel;
31---the planet carrier end cap;
32---the lattice rotary drum;
33---filter axle placed hole;
34---the filter cylinder axis hole;
35---filter medium;
36---filtrate receiver;
37---flow deflector;
38---the filter cylinder central tube;
39---planet pinion, can form by key connecting by gear, also can on the filter axle, directly process;
40---hole, filtrate channel;
41---filter axle centre bore is filtrate channel;
42---filter axle and filter cylinder connecting section.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
Embodiment 1:
Planet gyration small circular cylinder continuous pressure filtration machine is used for the isolated by filtration of PTA (purified terephthalic).Planet gyration small circular cylinder continuous pressure filtration machine, its pressure housing is made of end socket 4, cylindrical shell 7 and end socket 11, is fixedly supported on the support by bearing 17.In the pressure housing positioned inside main revolving body and discharging slagging device are arranged.Wherein filter cylinder 10 is installed on the lattice rotary drum 32 of planet carrier 6 the formation filter element with after filter axle 9 connects; The long 1m of filter cylinder, the filter area of single filter cylinder is 1m
2, total filter area is 10m
210 groups of such filter elements being arranged in whole pressure housing, be installed in jointly on the lattice rotary drum 32, constitute main revolving body, is the main core component of filter work.Main revolving body is driven through gear (or turbine and worm) reducing gear 1 by motor.The lattice rotary drum 32 of planet carrier 6 is for being divided into 10 separate five equilibriums, the corresponding one group of filter element of each lattice.Filtrate channel 30 is communicated with the moving dispensing head 29 of planet carrier 6 left ends, and constitutes the filtrate switching device shifter with quiet dispensing head 2, and moving dispensing head 29, quiet dispensing head 2 junctions are by corresponding moving cross gas plate 19,20 contacts of quiet cross gas plate and realization sealing.The planet pinion 39 of filter axle 9 one ends and a ring gear engagement as sun gear 5 are done differential motion under planet carrier 6 drives.The gearratio that planet differential mechanism adopts is 1: 20, and final drive shaft 28 revolution rotating speeds are 1.5rpm, and filter cylinder 10 rotation rotating speeds are 30rpm.The discharging slagging device is made up of conveyor screw 12, connect material groove 16 and unloader knife 25 and baffle plate 27.The groove 16 top openings that connect material, baffle plate 27 is placed in the opening both sides, settles 2 18 ° of one-tenth between unloader knife 25, two unloader knives by doctor blade holder above in baffle plate 27, and the symmetrical plane of two scrapers becomes 30 ° of angles with horizontal plane.During discharging, every scraper is laid down the filter cake on 1/2nd circumference arc degree on the filter cylinder.Auger conveyor 12 is driven by motor 13.
During the planet gyration small circular cylinder continuous pressure filtration machine operation, pressure housing the first half of filter is full of HCS, feed the steam of T＞155 ℃, P＞0.6MPa by compressed vapour inlet tube 23, the latter half is a kiln basin, feeds T=155 ℃ of filtering suspension liquid by feed pipe 18.Because just with the pressure of 0.6MPa, slip is sent into can be without booster pump in the filter when upstream process is discharged.Filter cylinder 10 enters kiln basin under the revolution motion of planet carrier 6 drives, the pressure of filter medium 35 belows is P=0.48MPa, filters pressure drop Δ P=0.12MPa.Under the effect of filtered driving force (pressure reduction), form filter cakes on filter cylinder 10 surface, below filter medium 35, form filtrate simultaneously, filtrate temperature T=150 ℃, pressure is P=0.48MPa.Filtrate is entering in the filter cylinder central tube 38 through filtrate receiver 36 under the guiding of flow deflector 37.Filter cylinder 10 makes the filter cake that forms have good effect also in rotation simultaneously.The radian of fillter section on circumference is assigned as α=135 °.Enter washing section after kiln basin is left in filter cylinder 10 revolution, washings are the liquid steam of T＞155 ℃, P＞0.6MPa, are introduced by washing lotion inlet tube 21.Wash in the scope of β=70 in a circumferential direction ° and carry out.Washings through washing tank 22 flow out and spray on the filter cake on filter cylinder 10 surfaces, because simultaneous rotation makes washing evenly, comprehensively.Enter the drying and dehydrating section after the washing, the dewatering period radian is assigned as γ=80 °.Filter cake is compressed the further dry water capacity that reduces of steam.Enter unloading part after the drying, discharging is carried out in the scope of δ=45 °.Filter cylinder 10 simultaneous revolution and rotations make 25 of filter cylinder 10 and unloader knives have relative motion, and dried filter cake contacts and unloads with unloader knife 25 under the drive of filter cylinder 10; Filter residue after unloading is being transported under the effect of auger conveyor 12 above the drainage conduit 14, under the gravity effect, enter in the drainage conduit 14, drainage conduit connects the horizontal flashboard type intelligent unloading controller 15 of a pair of 14 times, discharges filter residue when guaranteeing filter housing internal pressure.Filter cylinder 10 after the discharging enters filter medium blowback district under revolution drives, high pressure purge gas T＞160 ℃, P＞0.65MPa carry out blowback through quiet dispensing head 2, filtrate channel 30 and 38 introducings of filter cylinder central tube to filter medium 35, make it obtain regeneration.Filter medium blowback section radian is assigned as ε=30 °.So far finish single filter cylinder filter cycle, under the circulation running of many filter cylinders, realized the continuous production of filter.
Operating pressure P＞the 0.6MPa of filter, operating temperature T=200 ℃.In filter process, slip solid concentration～36.4% of PTA can form the above cake layer of 50mm on the filter cylinder, and the production capacity of filter can reach 37t/h (butt), and the filter cake water capacity can be controlled in 10%, solid content in the filtrate＜0.5%.
Embodiment 2:
Planet gyration small circular cylinder continuous pressure filtration machine is used for the isolated by filtration that soda ash is produced heavy alkali.The housing of planet gyration small circular cylinder continuous pressure filtration machine supports and is fixed on the support by saddle 17, and its housing is made of end socket 4, cylindrical shell 7 and end socket 11 3 parts.Its left end socket 4 central authorities are equipped with bearing block 3, quiet dispensing head 2 fixed in position are in bearing block 3, planet carrier 6 is placed in the bearing block 3 by two pairs of bearings simultaneously, the planet carrier 6 left end shaft shoulders are as moving dispensing head 29, and it is relative with quiet dispensing head 2, moving dispensing head 29, quiet dispensing head 2 have a moving cross gas plate 19, quiet cross gas plate 20 fixedly to link with it respectively, and the end face of two cross gas plates is combined closely and realized sealing, reaches the purpose that filtrate is switched simultaneously.Final drive shaft 28 connects firmly by the hollow space and the planet carrier 6 of quiet dispensing head 2 and two cross gas plates, and is driven by gear reduction 1.One gear wheel is installed in bearing block 3 right-hand members as sun gear 5, and is sealed in planet carrier 6 inside with planet carrier end cap 31.Lattice rotary drum 32 is arranged on the planet carrier 6, and lattice rotary drum 32 inside are divided into 8 separate five equilibriums, and each divides grid space all to have a filtrate channel 30 to be communicated with moving dispensing head 29.On lattice rotary drum 32, have the filter axle placed hole 33 identical with total number of divisions.Filter axle 9 is placed on the lattice rotary drum 32 by filter axle placed hole 33, and guarantees necessary sealing property with seal 8.The planet pinion 39 of filter axle 9 one ends is realized differential motion with sun gear 5 engagements.Final drive shaft 28 rotating speeds are 2rpm, and gearratio is 1: 30, and filter axle 9 rotation rotating speeds are 60rpm.The filter cylinder axis hole 34 of filter cylinder 10 links to each other with filter cylinder connecting section 42 with the filter axle of filter axle 9, and filter axle centre bore 41 and the filter cylinder central tube 38 formation internal filtrate passage that links.Filter cylinder 10 is a perforated cylinder member, covers filter medium 35 thereon and forms filter element.Filter cylinder 10 is of a size of long l=1m, diameter d=0.5m, and total filter area is 12m
2Filter axle 9 reaches the filtrate channel 30 that is communicated with it with filter cylinder 10 and constitutes one group of filter assemblies, is installed in jointly on the circumferencial direction of planet carrier 6 by 8 groups of such filter assemblies, has constituted the main revolving body of filter.Central space is mounted with the discharging slagging device on the right side of main revolving body, is placed in the central authorities of right end socket 11 by its shell groove 16 that connects material.One conveyor screw device 12 is placed in the central authorities of the groove 16 that connects material, and is driven by the damp-proof machine 13 that is placed in the inner right-hand member of pressure housing.Connect material and decontrol on the groove 16 mouthful, the opening both sides are equipped with two baffle plates 27, and upper fixed are equipped with 3 unloader knives 25 in the baffle plate 27, become 10 ° of distributions between scraper, and middle scraper become 30 ° with horizontal plane.The vertical drainage conduit 14 of installing of groove 16 tail ends that connect material, drainage conduit 14 belows connect intelligent unloading controller 15.
During the planet gyration small circular cylinder continuous pressure filtration machine operation, introduced by feed pipe 18 from the suspension slip of carbonation process, solid phase is NaHCO in the suspension
3, content is 25%, liquid phase is for containing NaCl and NH
4The aqueous solution of Cl, suspension forms kiln basin in filter housing the latter half, and temperature is 42 ℃.Link to each other with air compressor by exterior line by compressed air inlet pipe 23 simultaneously, introduce compressed air and keep filter housing inner and upper constant compression force.Compressed air parameter P=0.3MPa, T=45 ℃.Under final drive shaft 28 drove, filter cylinder 10 entered kiln basin with the revolution of planet carrier 6, and under differential pressure action, filter medium 35 tops form filter cake.Simultaneously form filtrate below filter medium 35, filtrate is entering in the filter cylinder central tube 38 through filtrate receiver 36 under the effect of flow deflector 37.Filtrate further causes moving dispensing head 29, the switching of quiet dispensing head 2 places by filtrate channel 30, switches rear filtrate and discharges filter through filtrate pipe.In this process, because the rotation of filter cylinder 10 makes that the filter cake molding effect is good, the radian of fillter section on circumference is assigned as α=140 °.Enter washing section after kiln basin is left in filter cylinder 10 revolution, washing is carried out in the scope of β=75 °.Cleaning solution (clear water) through washing tank 22 flow out and spray on the filter cake on filter cylinder 10 surfaces because simultaneous rotation makes washing evenly, comprehensively, the solutes such as NaCl in the filter cake are removed by abundant washing.Enter the drying and dehydrating section after the washing, filter cake is compressed the further dry water capacity that reduces of air in the scope of γ=75 °.When dried filter cake goes to discharge zone with filter cylinder 10, filter cylinder 10 and unloader knife 25 near and have relative motion, filter cake contacts and unloads with unloader knife 25.Discharging occurs in the scope of δ=40 °.Unload the filter residue that falls being transported under the effect of auger conveyor 12 above the drainage conduit 14, under the gravity effect, enter in the drainage conduit 14, connect an intelligent unloading controller 15 under the drainage conduit, under the control of intelligent unloading controller 15, discharge filter residue smoothly.After the discharging, filter cylinder 10 enters filter medium blowback district under revolution drives.Purge gas is introduced through quiet dispensing head 2 ends, switches the back and oppositely enters filter cylinder 10 inside by filtrate channel 30, filter medium 35 is carried out pulse cleaning, blowback air P=0.35MPa, normal temperature.Blowback section radian is assigned as ε=30 °.Finish to this filter cycle, when filter cylinder 10 enters kiln basin once more with final drive shaft 28 rotations, begin next filter cycle.The so many circulation running of filter cylinder on filter housing inner periphery direction realizes the continuous production of filter.
In the production, the operating pressure P＞0.3MPa of filter, operating temperature T=50 ℃.Suspension solid concentration 25% can form the cake layer of 30～40mm on the filter cylinder.The filter cake water capacity that generates can be controlled in 8% NaCl content＜0.5% in the filter cake.Output can reach 60t/h
Embodiment 3:
Planet gyration small circular cylinder continuous pressure filtration machine is used for the isolated by filtration of PVC, does not need filter cake is washed in the process of isolated by filtration PVC.The integral body of planet gyration small circular cylinder continuous pressure filtration machine is supported and fixed on the support by bearing 17 by shell, and the filter shell is made up of three parts, comprises end socket 4,11 and cylindrical shell 7.In enclosure interior main revolving body and unloader conveying mechanism are arranged.Wherein main revolving body is made of planet carrier 6 and many groups filter assemblies of being installed on it.The short lattice rotary drum 32 of one axial length is arranged on the planet carrier 6, and lattice rotary drum 32 inside are divided into 12 independently intervals by dividing plate, and each independently all has filtrate channel 30 to link with it in the lattice interval.Every group of filter assemblies reaches a branch grid space that is communicated with it by filter axle 9, filter cylinder 10 and constitutes.Filter cylinder 10 is installed on the lattice rotary drum 32 by filter axle placed hole 33 with filter axle 9 assembling backs, and guarantees its sealing property by corresponding seal 8.Filter cylinder 10 is of a size of l * d=1.5 * 0.3 (m), and total filter area is 17m
2Planet carrier 6 supports by the bearing block 3 that is placed in filter housing one end central authorities.Bearing block 3 right-hand members are installed a ring gear as sun gear 5, sun gear 5 meshes with the planet pinion 39 of filter axle 9 one ends, drives planet carrier 6 revolution by final drive shaft 28 transferring power, realizes the rotation of filter assemblies simultaneously, gearratio is 1: 40, final drive shaft 28 rotation speed n=3rpm.Moving dispensing head 29 is relative with quiet dispensing head 2 on being fixedly mounted on bearing block 3, has the end face of one group of moving cross gas plate 19 and quiet cross gas plate 20 and two dispensing heads to be fixedly connected simultaneously respectively, forms end face seal by two cross gas plates during operation and realizes the filtrate switching.Central space at main revolving body is equipped with the unloader conveying mechanism, and this mechanism is fixedly mounted on right-hand member end socket 11 central authorities of filter by its shell groove 16 that connects material.Connecting material in the groove 16 is an auger conveyor 12, and auger conveyor 12 is connected with planet carrier 6 by a differential mechanism, and drives its rotation.Groove 16 upper sheds that connect material, opening part is positioned to two baffle plates 27 of 90 °.Adopt the blowback discharging, opening and baffle-panels to directly over, the material slag that blows off is caught and is fallen into by baffle plate 27 and connects material in the groove 16.
During planet gyration small circular cylinder continuous pressure filtration machine work, starter motor drives planet carrier 6 rotations, introduces filtering suspension liquid by feed pipe 18 simultaneously, and temperature is 70 ℃, and wherein PVC content is 40%.Suspension forms kiln basin in filter housing the latter half, introduces pressure-air by inlet for pressurised gas pipe 23 simultaneously, keeps filter housing inner and upper constant compression force at 0.5MPa, for filtration provides motive force.Filter cylinder 10 enters kiln basin with the revolution of planet carrier 6, filters under differential pressure action, and the fillter section radian is α=160 °.During filtration, filter medium 35 tops form filter cake, because the rotation of filter cylinder 10 makes that the filter cake molding effect is good.Simultaneously form filtrate below filter medium 35, filtrate is entering in the filter cylinder central tube 38 through filtrate receiver 36 under the effect of flow deflector 37.Filtrate further causes dynamic and static dispensing head switches, and switches rear filtrate and discharges filter through filtrate pipe.Owing to need not wash when filtering PVC, so β=0 ° directly enters the drying and dehydrating stage, drying and dehydrating carries out in the scope of γ=70 °.Under compressed-air actuated effect, the filter cake of formation further dehydrates, and reduces water capacity, is controlled in 5%.Enter discharge zone behind the drying and dehydrating, discharge zone δ=60 °; Adopt gases at high pressure blowback discharging, purge gas P=0.55MPa, T=75 ℃.When the filter cylinder 10 that has filter cake goes to directly over the groove 16 that connects material, the dispensing head place switches to the purge gas pipe, the high pressure purge gas enters in the filter cylinder 10 by 30 ones of filtrate channels in the planet carrier, and filter cake drops under the gases at high pressure effect and into connects material in the groove 16, finishes discharging.Also make filter medium 35 obtain regeneration in the time of the blowback discharging.In order to guarantee the reliability of filter medium regeneration, can in the scope of ε=30 °, introduce instantaneous high pressure gas and carry out blowback, P=0.60MPa.So far finish a filter cycle, the filter cylinder after the regeneration enters kiln basin once more under revolution drives, and enters into next filter cycle.Under the circulation running of many filter cylinders, realized the continuous production of filter.
In the production, the operating pressure P=0.5MPa of filter, operating temperature T=70 ℃.Suspension solid concentration 40% can form the above cake layer of 25mm on the filter cylinder.Output can reach 100t/h.
26 is watch window among the figure, and 24 is Pressure gauge.Supporting instruments such as safety valve, liquid level gauge, thermometer also are installed on the pressure housing, are convenient to the physical parameter in the filter housing is carried out observing and controlling.
Structure of the present invention is not limited to embodiment and the described structure of accompanying drawing.
Claims (10)
1, a kind of planet gyration small circular cylinder continuous pressure filtration machine comprises: by the pressure housing that end socket (4,11) and cylindrical shell (7) constitute, pressure housing one end is fixed with quiet dispensing head (2), and pressure housing inside is equipped with filter element and discharging slagging device; It is characterized in that: filter element filter cylinder (10) is installed on the main revolving body, and main revolving body is filtered axle (9) by planet carrier (6), and filter cylinder (10) constitutes; The discharging slagging device is by auger conveyor (12), the groove that connects material (16), and unloader knife (25), baffle plate (27) constitutes; Central authorities at pressure housing one end end socket (4) are equipped with bearing block (3), and planet carrier (6) is supported on pressure housing inside by bearing block (3), and coaxial with it; Filter axle (9) is installed on the lattice rotary drum (32) of planet carrier (6), the planet pinion (39) of filter axle (9) one ends and sun gear (5) engagement that is fixed on bearing block (3) one ends; The other end filter axle of filter axle (9) is connected with the filter cylinder axis hole (34) of filter cylinder (10) with filter cylinder connecting section (42); The discharging slagging device is installed in the central authorities of pressure housing other end end socket (11) by its shell groove (16) that connects material, and auger conveyor (12) is installed in the groove that connects material (16) inside, and the discharging slagging device is positioned at main revolving body right part central space.
2, planet gyration small circular cylinder continuous pressure filtration machine according to claim 1 is characterized in that its planet carrier is a combining structure, comprising: final drive shaft (28), moving dispensing head (29), filtrate channel (30), planet carrier end cap (31), lattice rotary drum (32), filter axle placed hole (33); Lattice rotary drum (32) axial length is less, inside is divided into a plurality of sector spaces, and each sector space is separate, the total number of divisions of lattice rotary drum (32) is generally 8～16, total number of divisions equates that with the filter element number each filter element is made up of filter cylinder (10), filter axle (9) and corresponding filtrate channel (30); Filtrate channel (30) is opened on the carrier main-body, and is communicated with the inner space of corresponding lattice rotary drum (32); Final drive shaft (28) and the carrier main-body structure that is fixed with one; The planet carrier left end shaft shoulder serves as moving dispensing head (29), and its end face is relative with quiet dispensing head (2) end face on being fixedly mounted on bearing block (3).
3, planet gyration small circular cylinder continuous pressure filtration machine according to claim 1 is characterized in that bearing block (3) is installed in actionless pressure housing one end end socket (4) central authorities; Quiet dispensing head (2) is fixedly mounted on the bearing block (3); Bearing block is mounted with thrust bearing in (3).
4, planet gyration small circular cylinder continuous pressure filtration machine according to claim 1 is characterized in that the discharging slagging device by auger conveyor (12), the groove that connects material (16), and unloader knife (25), baffle plate (27) and driving machine constitute; The shell of discharging slagging device by auger conveyor (12) groove (16) that connects material is installed in actionless pressure housing other end end socket (11) central authorities; Groove (16) the top opening that connects material, unloader knife (25) are placed in the groove that connects material (16) and go up and be positioned at the opening top, and are positioned at baffle plate (27); Auger conveyor (12) directly is different from engine (13) driving of main revolving body rotating speed by another rotating speed or connects by differential mechanism and main revolving body.
5, planet gyration small circular cylinder continuous pressure filtration machine according to claim 1 and 2 is characterized in that its main motion mechanism is the differential motion mechanism that a planet gear mechanism forms; Each filter element is all done the planet differential motion under the drive of final drive shaft (28); Its revolution is the gearratio of planetary mechanism gear with the rotation rotating ratio, by the gear ratio decision of sun gear (5) with the planet pinion (39) of filter axle (9) one ends, is generally 1: 5～100; Sun gear (5) is a ring gear or external gear, connects firmly on the right-hand member of bearing block (3).
6, planet gyration small circular cylinder continuous pressure filtration machine according to claim 2, it is characterized in that its filter element filter cylinder (10) covers filter medium (35) and constitutes for the prefabricated filter element of moulding or on the perforated cylinder member, flow deflector (37) is installed in the filter cylinder (10), flow deflector (37) is star-like and is arranged in filter cylinder central tube (38) all around, and filter cylinder (10) is inner to be divided into a plurality of fan-shaped filtering areas by flow deflector (37); Offer filtrate receiver (36) on the filter cylinder central tube (38).
7, planet gyration small circular cylinder continuous pressure filtration machine according to claim 2, it is characterized in that on moving dispensing head (29) two end faces relative, being separately installed with moving cross gas plate (19) and quiet cross gas plate (20) with quiet dispensing head (2), two cross gas plates connect firmly with the end face of two dispensing heads respectively, and two cross gas plates are made with soft, hard two kinds of different materials respectively.
8, planet gyration small circular cylinder continuous pressure filtration machine according to claim 2, it is characterized in that its special filter axle design: filter axle (9) one ends have planet pinion (39), and planet pinion (39) connects by key and filter axle (9) or directly processes on an end of filter axle (9); The part that filter axle (9) is connected with filter cylinder (10) must be hollow, offer filter axle centre bore (41), filter axle centre bore (41) one ends are communicated with the filter cylinder central tube (38) of filter cylinder (10), and the other end has a through hole (40) to pass through mutually with it, make itself and lattice rotary drum (32) inner space together with; Lattice rotary drum (32) junction at filter axle (9) and planet carrier (6) is provided with seal (8).
9, planet gyration small circular cylinder continuous pressure filtration machine according to claim 4, it is characterized by, its discharge way is mechanical doctor discharging or gases at high pressure blowback discharging: the groove that connects material (16) top opening, opening part is provided with baffle plate (27), unloader knife (25) number is determined according to actual needs, be 2～3, be positioned at baffle plate (27) top and be mutually certain angle; Or filter cylinder (10) is introduced the high pressure purge gas from quiet distribution head end and is carried out the blowback discharging when being positioned at baffle plate (27) inner and upper.
10, planet gyration small circular cylinder continuous pressure filtration machine according to claim 4 is characterized in that drainage conduit (14) vertically is consolidated in the tail end of the groove that connects material (16); And there is intelligent unloading controller (15) to be placed in the lower end of drainage conduit (14).
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| CNB2007100504944A CN100553730C (en) | 2007-11-14 | 2007-11-14 | Planet gyration small circular cylinder continuous pressure filtration machine |
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| CNB2007100504944A CN100553730C (en) | 2007-11-14 | 2007-11-14 | Planet gyration small circular cylinder continuous pressure filtration machine |
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