CN1071094A - Continuous pressure filter - Google Patents

Abstract

A kind of continuous pressure filter, by body, filter plate, the compressed air inlet, feed pipe, speed reducing driving device, device for transporting objects, discharge bucket, compositions such as tapping bucket, its body is a cuboid pressure vessel, in the cabinet of middle part device for transporting objects and filter plate are arranged, the filter plate bottom is a discharge bucket, end has tapping bucket, equipment is worked under 0.1～0.6MPa pressure, speed reducing driving device drives the device for transporting objects motion by connecting rod, to regulate and to keep required cake layer thickness and material to be separated is pushed into discharge zone from feed zone, the present invention has the production efficiency height, totally closed operation, applied widely, the automaticity advantages of higher.

Description

Continuous pressure filter

The invention belongs to separator, the liquid-solid two-phase separation as the water homogeneous suspension liquid is applicable to industrial production such as chemical industry, light industry and sewage disposal.

At present, the filter plant that uses in the industrial production can be divided into two types of clearance-type and continous ways.Clearance-type filter plant commonly used has plate and frame filter press, filter board type pressure-filtering tank, vacuum filtration jar, vacuum leaf filter etc.Filtering type filter plant commonly used has rotary drum vacuum filter, vacuum belt filter etc.The shortcoming of clearance-type filter plant is: 1. the gap is filtered into static filtering, in filter process, continuous increase along with cake layer thickness, its rate of filtration is obviously descended, and 2. owing to gap operating, each required processing in gap is slagged tap, arrangement filter cloth and corresponding disassemble and assemble work thereof, the shared time is longer, accounts for 30～40% of straight time, and labour intensity is very big; The major defect that the continous way filter plant exists is: 1. filtration pressure difference is low, and this has just limited the raising of the rate of filtration large program very much; 2. present employed its version of continous way filtering equipment all is belt drive generally, and the actual filtration work area is limited, and the backhaul of belt has occupied the equipment volume of considerable part.3. generally this kind equipment is the watertight working condition, and in chemical industry, the pharmaceutical work industry overwhelming majority hazardous medium is arranged, and under working condition surrounding environment is polluted, and should not use.The pressure band filter of external comparatively advanced person's continous way filter plant such as Italian HIP company and HUyCK, the development of AUSTRIA company, though have the production efficiency height, the full-automatic advantage of operation continuously, but still exist strainer is made idle work and occupied suitable volume in returning the way deficiency, and during the work of the every round trip of filter cloth, cause the loss of molecule, and it is poor to handle material variable pitch of different nature, the scope of application is little.

The objective of the invention is to overcome and state deficiency on the prior art and design a kind of high efficiency, totally enclosed type operation, that carry out automatically, that applicability is strong, the simple and reasonable continuously continuous pressure filter of charging, isolated by filtration, discharging.

The rationale first of the present invention is in filter process, and the resistance of the filter cake that forms is a vital problem for the efficient of filtering.Research conclusion for cake layer: can not there be (or too thin), also can not be thick.If there is not the loss that (too thin) certainly will cause molecule, and the continuous increase of opposite cake layer thickness, certainly will cause the remarkable decline of filtering rate, for different materials, under the situation of suitable filter medium (filter cloth), all there is a desirable cake layer thickness, so that the unlikely loss of molecule, the corresponding minimum of filtration resistance, the present invention utilizes the slidable adjustment body to regulate scraper plate height up and down, makes equipment can regulate control and approaches desirable cake layer thickness.And under this ideal, fixing cake layer state, carry out dynamic filtration, Fig. 8 is the filtration yield of constant voltage static filtering and the relation of time variation, and the changing condition of the filtration time and the rate of filtration, in the real process of filtering, already having formed the thin cake layer that prevents that molecule runs off near the A point, also is corresponding filtration resistance minimum state.If keep this fixedly thickness of cake layer, carry out dynamic filtration, just can improve the rate of filtration greatly.Handling a certain material with our factory is example: general static pressure (pressure 0.25MP is subjected to filtering surface amass 0.63M), handle 500L filtrate, and need 60 minutes, if the dynamic filtration of work when being second to the 3rd minute with the A point, required time only is 21,5 minutes.

500 ÷ 23,24=21,5(minute)

Therefore the rate of filtration can improve nearly 3 times, and this equipment also seethes, and the filtering layer that loosened makes filter effect better; It two is according to filtering fundamental equation as can be known, and along with increasing of pressure reduction, under the constant substantially situation of filtration resistance, the rate of filtration also will approach directly proportional and improve.Therefore, if design is operated under the operating pressure of 0.6MPa,, can raise the efficiency about 6 times than the vacuum continuous filtration equipment of same thickness of filter bed.

Implementer's case of the present invention is: the continuous pressure filter of being made up of casing, speed reducing driving device, device for transporting objects, filter plate with holes, charging aperture, compressed air inlet, tapping bucket, discharge bucket etc.Casing is a pressure vessel, and there is the compressed air inlet at its top, observes visor and feed pipe, and the local accumulation of material has two chargings to be in charge of in the bottom of feed pipe in the body, and the material distributing pipe that two chargings are in charge of with downside has a rectangular passage communicates; The position of material distributing pipe is when scraper plate stroke top, the top, front side of its last piece scraper plate, casing one side has a circular hole, by circular hole connecting rod is housed, between connecting rod and the casing, filler device sealing is arranged, and an end of connecting rod is connected with speed reducing driving device, and the interior screed frame of the other end and casing is connected, for the motion that makes slide block, chute modify-water level state is desired four motion states, with connecting rod that screed frame 26 is connected on, set up a small rod, whole connecting rod is divided into three sections; Corresponding both sides, casing middle part, the square opening of symmetry is arranged, can be 2～6, the slidable adjustment body is housed on the square opening, in the slidable adjustment body, the chute that has two elliptical apertures is positioned on the base plate, and the purpose of elliptical aperture is to allow chute can make the usefulness of up-down adjustment, in the chute both sides, be fixed with adjusting fixed head to 90 ° of chute bottom side bendings, regulate on the fixed block set screw is housed, set screw is positioned at both sides, chute bottom, is used to regulate the suitable height of chute; Slide block is arranged in the chute, and the slide block bottom has an oblique slotted hole, and its gradient can be 10 °～44 ° according to different liquid-solid ratio materials and front and back end difference, so that regulate, in the oblique slotted hole, axle sleeve is housed, and axle sleeve is enclosed within on the suspended axle; Device for transporting objects is made up of scraper plate, screed frame, suspended axle, slidable adjustment body, and many row's scraper plates are arranged under the screed frame, and suspended axle is contained on the screed frame, and there are axle sleeve and slidable adjustment body in the suspended axle two ends; The porous filter plate is equipped with in the scraper plate below, place mat filter cloth on the filter plate, and filter plate bottom one side has tapping bucket, and the solid discharge bucket is arranged at the opposite side bottom; Four supporting leg pulleys are arranged at the discharge bucket bottom, and the supporting leg pulley overhead has a spacing; Discharge bucket connects feeding screw, and the feeding screw shell is a cylindrical shape, at spiral limb edge line with rubber band, to guarantee sealing.Body is supported by four support supporting legs.

The filter material can be selected carbon steel or stainless steel for use according to the requirement of different material, the gearing friction part, because its duty has steam, available oil-free lubrication mode, at its connecting rod position configuration polytetrafluoroethylene (PTFE) axle bush, in its slide block and chute contact portion, edge is joined the polytetrafluoroethylene (PTFE) fricting strip on slide block.

The present invention compared with prior art has the following advantages: 1. production efficiency height, with plate and frame filter press relatively, can raise the efficiency about 3～4 times, compare with pressurized tank, can raise the efficiency 4-5 doubly, compare with rotary drum vacuum filter, can raise the efficiency 5～6 times; 2. automaticity height, charging, filtration, discharging are carried out continuously automatically, greatly reduce labour intensity, and a people can operate multiple devices; 3. closed performance is good, other filter plant, all exist the duty problem of environment pollution caused in various degree as plate and frame filter press, pressure-filtering tank, rotary drum vacuum filter etc., the present invention works under full closeding state, can avoid material pollution to external world, oil, chemical industry, pharmaceuticals industry are used particularly important, also can be avoided the quality influence of materials such as external environment is refining to some, finished product in addition; 4. applied widely, the present invention has possessed can regulate cake layer thickness and according to the tunable arrangement of the liquid-solid ratio of difference, with adapt to different viscosities, granularity is separated with the liquid-solid of material of different liquid-solid ratios.This does not also possess for other filter plant; 5. equipment volume is little, and compact conformation is simple, novel, durable in use, not fragile, easy to maintenance, is widely used in industrial production such as chemical industry, oil, metallurgy, pharmacy, light industry and sewage disposal.

Fig. 1 is an assembling front view of the present invention;

Fig. 2 is an assembling plan view of the present invention;

Fig. 3 is an assembling side elevation of the present invention;

Fig. 4 is a slidable adjustment body front view of the present invention;

Fig. 5 is a slidable adjustment of the present invention side view;

Fig. 6 is operating procedure figure of the present invention;

Fig. 7 is a working state figure of the present invention.

Fig. 8 is the filtration yield of constant voltage static filtering of the present invention and the variation relation of time, and the changing condition curve map of the filtration time and the rate of filtration.

Among Fig. 1, the top cover ofcuboid pressure housing 1 is welded byrectangle end socket 2 and rectangular flange 3, offersfeed pipe 4 on therectangle end socket 2, andvisor 6, Pressure gauge and exhaust port 7 are observed in compressed air inlet 5;Casing 1 middle part is a cuboid casing 8, with rectangular flange 3 and rectangular flange 9 welding, in its length direction both sides, has four square openings up and down, is welding the fixed base plate of fourslidable adjustment bodies 10; In its width one side, offer a circular port, connectingrod 11 andfiller device 12 are housed,filler device 12 endoporus edge is joined the polytetrafluoroethylene (PTFE) axle sleeve, and filler adopts rubber ring or other encapsulant; The reductor of speed reducingdriving device 13 is fixed on casing one side with support plate, oneeccentric wheel 24 is installed on the speed reducer output shaft, be connected with device for transportingobjects 14 byfiller device 12 with connectingrod 11, connectingrod 11 is divided into three sections, and every end two connects the guide movable joint form that all adopts.Rectangle porous filter plate 16 is equipped with inscraper plate 15 belows, and filter plate 16 most of areas occupy the filter opening that isogonism is arranged, place mat filter cloth on the filter plate 16.Filter plate 16 bottoms one side has tappingbucket 21,solid discharge bucket 20 is arranged at the opposite side bottom, one side of discharge bucket top, filter plate has a rectangular through holes groove, configuration one trim ring in the groove, between rectangular through holes and filter opening district, the one narrower dull and stereotyped district of atresia is arranged, several tightness screw positions are from bottom to top arranged in its underpart; Rectangular flange 9 and tappingbucket 21,discharge bucket 20 welding, between two hoppers, the welding of one horizontal stripe and rectangular flange is arranged, last plane and rectangular flange 9 are same processing plane, in horizontal stripe, offer several circular holes, reinstate bolt with rectangular flange 9 screws one and be connected with filter plate 16, four supportingleg pulleys 22 are arranged atdischarge bucket 21 bottoms, and there is the spacing of 10～30mm on supporting leg pulley and ground; Foursupport supporting legs 23 are arranged on thecasing 1, be used for fixing, support entire equipment.

Among Fig. 2, an end of connectingrod 11 is connected with speed reducingdriving device 13, and the screed frame 26 in the other end and thecasing 1 is connected, with connectingrod 11 that screed frame 26 is connected on a small rod 17 is arranged.Device for transportingobjects 14 is made up of two suspendedaxles 25, screed frame 26,scraper plate 15 and axle and framework connector, at axle and framework connecting portion, press frame thickness car one small axle diameter, so that being stuck on the framework, axle locatees, fix with gland bolt again, two suspendedaxles 25 are loaded on the screed frame 26, and there isslidable adjustment body 10 at the two ends of suspendedaxle 25, and screed frame has many row'sscraper plates 15 for 26 times.

Among Fig. 3, the bottom offeed pipe 4 has two chargings to be in charge of 18, it is circular-arc that 18 downward crooks are in charge of in charging, two chargings are in charge of 18 and are communicated withmaterial distributing pipe 19 that downside has a rectangular passage, the position ofmaterial distributing pipe 19 when scraper plate stroke top, top, the front side of its last piece scraper plate, 10 is the slidable adjustment body, 30 is the control agent seal cover, and 23 is the support supporting leg, and 22 is the supporting leg pulley.

Among Fig. 4, thechute 31 that has two elliptical apertures is fixed on thebase plate 32; In chute 331 both sides, be fixed with adjustingfixed block 33 to 90 ° ofchute 31 both sides bendings, regulate on thefixed block 33set screw 34 is housed, setscrew 34 is positioned at both sides,chute 31 bottom,slide block 35 is installed in thechute 31, inslide block 35 bottoms one obliqueslotted hole 36 is arranged, its gradient front end is 17 °, and the rear end is 37 °.

Among Fig. 5, suspendedaxle 25 two ends are furnished withaxle sleeve 37 for 36 li at the oblique slotted hole ofslide block 35, andaxle sleeve 37 usefulness shaft end nuts are positioned in theslide block 35, andaxle sleeve 37 should have axial movement value, and controlagent seal cover 30 usefulness nuts are fixed on thebase plate 32.

Among Fig. 6, stock material to be separated by withstandvoltage head tank 38, according to circumstances can heat or be incubated, in order to reducing viscosity, improving liquidity can, be beneficial to filtration, or stirred so that its suspension particle is evenly distributed at this, compressed air with 0.1-0.6MPa, act onhead tank 38 andfilter 39 simultaneously,filter 39 is worked under band pressure situation, the material ofhead tank 38 can enterfilter 39 with the valve controlling flow amount, the reductor of filter (as then better) with infinitely variable speeds, drive eccentric wheel, make connecting rod make horizontal reciprocating movement, the reciprocating motion of connecting rod, at four groups of slide blocks, under the instruction of the ad hoc structure shape of chute, makescraper plate 15 change over four horizontal push feeds of motion process: A; B upwards slightly raises, and front and back end raising height difference is selected the specification of slide block in liquid-solid ratio; The flat material of C backhaul; D falls and waits to advance.Regulating and keeping under the situation of required desirable cake layer thickness, with material to be separated from feed zone, be pushed into discharge zone by filtering area, and make the motion material keep thickness even substantially, and material is played seethe, loose effect, be more conducive to liquid-solid being separated in the whole motion process, utilize compressed air with filtrate at filter plate 16, carry out liquid-solid separation on the filter cloth, clear liquid flows out from tapping bucket 9, and the solid material freely falls from discharge bucket, is discharged by feedingscrew 40, feeding screw adopts cylindrical housing, and seals with assurance at spiral limb edge line with rubber band.

Among Fig. 7, A is push feed; B raises; The flat material of C backhaul; D falls and waits to advance, and 15 is scraper plate, and 16 is filter plate.

Claims (6)

1, a kind of continuous pressure filter comprises casing 1, filter plate 16, compressed air inlet 5, feed pipe 4 compositions, it is characterized in that:

1. compressed air inlet 5, feed pipe 4 be at the top of pressure housing 1, and the bottom of feed pipe 4 has two chargings to be in charge of 18, two chargings to be in charge of 18 and to communicate with material distributing pipe 19 that downside has a rectangular passage;

2. the side at cabinet 8 middle parts, one circular hole is arranged, by circular hole connecting rod 11 is housed, filler device 14 sealings are arranged between connecting rod 11 and the cabinet 8, one end of connecting rod 11 is connected with speed reducing driving device, and the screed frame 26 in the other end and the cabinet is connected, and connecting rod 11 is divided into three sections, an end that is connected with screed frame 26 has a small rod 17;

3. corresponding both sides, cabinet 8 middle parts, the square opening that symmetry is arranged, slidable adjustment body 10 is housed on the square opening, in slidable adjustment body 10, the chute 31 that has two elliptical apertures is positioned on the base plate 32, in chute 31 both sides, is fixed with the adjusting fixed block 33 to 90 ° of chute 31 bottom sides bendings, regulate fixed block 33 set screw 34 is housed, set screw 34 is positioned at the both sides of chute 31 bottoms; Slide block 35 is arranged in the chute 31, and slide block 35 bottoms have an oblique slotted hole 36, and its gradient is 10 °～44 °, in the oblique slotted hole 36, axle sleeve 37 is housed, and axle sleeve 37 is enclosed within on the suspended axle 25;

4. device for transporting objects 14 is: screed frame is equipped with many row's scraper plates 15 for 26 times, and suspended axle 25 is arranged on the screed frame 26, and there is axle sleeve 37 at suspended axle 25 two ends;

5. porous filter plate 16 is equipped with in scraper plate 15 belows, filter plate 16 bottoms one side has tapping bucket 21, solid discharge bucket 20 is arranged at the opposite side bottom, four supporting leg pulleys 22 are arranged at discharge bucket 21 bottoms, supporting leg pulley 22 overhead has a spacing, discharge bucket 20 connects feeding screw, and the feeding screw shell is a cylindrical shape, at spiral limb edge line with rubber band.

2,, it is characterized in that said casing 1 the best is the cuboid pressure vessel as the said filter of claim 1.

3, as the said filter of claim 1, it is characterized in that the position of said material distributing pipe 19, when scraper plate stroke top, top, the front side of its last piece scraper plate.

4, filter as claimed in claim 1 is characterized in that there are two visors 6 on the top of said casing 1, Pressure gauge and exhaust port 7.

5, filter as claimed in claim 1 is characterized in that in body 1 corresponding both sides 2～6 slidable adjustment bodies 10 being housed.

6,, it is characterized in that said supporting leg pulley overhead has 10～30mm spacing as the said filter of claim 1.

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