FI76704C - Sugtorkanordning - Google Patents

Description

, 76704

Suction dryer Sugtorkanordning 5

The invention relates to a suction dryer device comprising one or more filter plates of ceramic material, which filter plate is adapted to be displaceable in connection with the material to be filtered, the vacuum being adapted to be introduced into the ceramic filter plate to provide suction, the filterable material being adapted to adhere to the filter. the liquid is adapted to be absorbed into the central space of the filter plate.

The suction dryer device according to the invention preferably comprises a plurality of ceramic filter plates. The plates are arranged in a circumferential structure so that one of the plates is connected to a central suction pipe on the axis of rotation. Each filter plate is connected in one connection to that central pipe. The tiles are adapted to pass through the pool. The pool may be filled with peat or other similar desiccant. A vacuum is passed through the central pipe and connections to the filter plates. Due to the porous structure of the filter plates, the sludge in the basin from which the liquid is intended to be removed travels against the suction surfaces of the plates under the effect of the vacuum applied to the center of the filter plates. The liquid in the pool slurry is further absorbed by the vacuum through the suction surfaces of the filter plates into the central space and further along one into the central pipe and out of the structure.

When the filter plates are placed circumferentially around a central tube or shaft and the shaft is adapted to rotate, each filter-30 plate alternately moves into the basin and further rises as the axis of rotation rotates therefrom. As a result of the vacuum, the drying material attached to the suction surface of the tiles rises up from the basin with the filter tiles. When the vacuum is kept on, the drying of the substance continues during that ascent, and when the substance to be dried, for example the peat, has passed to the planing station. Removable wiping rollers or other removal devices, i.e. scraping the material from the air and the dried material, are removed from the connection between the tiles and the device.

2 76704 1 The suction surfaces of the filter plates in the dust cultivator according to the invention act specifically as liquid-impregnated suction surfaces, which means that air (or gas in general) does not pass through the suction with the pressure differences between the air and liquid used in the drying process. In the nozzle according to the invention, the object to be dried is brought into hydraulic contact with the liquid placed under a vacuum relative to the object to be dried by means of the suction surface of a plate impregnated with a fine-pore liquid.

In known cases, the problem has been the inadequacy of the wiping rollers 10, i.e. the scraper.

Conventional formulas easily create problems in the removal of the filter cake of the ceramic filter, leading to premature clogging of the filter material. The reason is that with ceramic filter materials the distance between the pattern and the surface of the filter varies because the ceramic materials cannot be manufactured with great dimensional accuracy. As a result, in places the scraper leaves a thick filter cake on the surface, while in places it scrapes the Pina completely bare. Carbon dioxide in the air is absorbed into the exposed moist filter material and in the lime slurries 20 the leachate is formed with sparingly soluble lime carbonate which gradually clogs the filter unusable.

U.S. Patents 3,688,337 and 4,131,548 disclose a formula cake remover for use in connection with disc and drum filters. These conventional patterned structures are not at all specifically suitable for ceramic filter tiles.

It is an object of the invention to provide a suction angle plate in which the scraper is supported so as to allow the scraper blade to monitor variations in the shape of the suction angle plates and in which the monitoring is performed by applying a certain controlled compressive force to the suction angle plate under all filtration conditions. It is also an object of the invention to provide a suction line in which it is possible to carry out a centralized control of the scraper blade in a simple and yet reliable manner, whereby the lmu-35 drying device can comprise several parallel groups of filter plates.

The invention is essentially characterized in that the suction dryer device comprises a scraper structure comprising a first holder for scraper blades arranged in a guide substantially perpendicular to the surface plane of the filter plate and in that a second support is also arranged on the guide to support the same filter. an effective pattern blade, wherein the supports are adapted to move in the guide along its longitudinal axis, the bodies of the pattern structure being connected to each other such that substantially opposite forces act on opposite surfaces of the filter plate.

10

Preferably, the suction dryer device according to the invention comprises both a first shaft and a second shaft, which act as a sliding guide, thus allowing the supports to move substantially perpendicular to the plane of the air slabs. According to the invention, the suction dryer device 15 comprises a plurality of adjacent suction dryer plate wheels, each wheel comprising a plurality of suction dryer plates. According to the invention, each tile is arranged to scrape a scraper structure in which the pattern blades are arranged on opposite sides of the sloping tile and substantially opposite each other. Each scraper blade comprises its own frame structure, which support structure 20 is supported according to the invention on at least one guide. Preferably, there are two guides and they are formed by parallel axes which are still perpendicular to the plane of the plate.

According to the invention, the brackets are operatively connected to each other in such a way that they cause an equal force to the suction angle plate.

Therefore, this support arrangement does not load the bearing structures of the pulley of the pulley when the forces cancel each other out.

According to the invention, the support pair is connected to each other in such a way that at least one spring is adapted to act on both the first support and the second support, and according to the invention the force with which the pattern blades or plate-side rollers contact the suction plate plate can be influenced.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

4 76704 1 Figure 1 is a schematic representation of a loop according to the invention.

Figure 2 shows a filter plate used in a dusting device according to the invention.

5

Figure 3 shows a cross-section of a filter plate according to the invention.

Figure 4 is a side view of a loop according to the invention and partly in a schematic representation.

10

Figure 5 shows a scraper according to the invention in a slide view.

Figure 6 is a plan view of the diagram of Figure 5.

Fig. 7 is a view of the scraper taken along section line I-I of Fig. 5.

Figure 8 is a sectional view of Figure 5 taken along line II-II of Figure 6.

20

Figure 9 shows a top view according to the invention at the templates and at the top of the template supports.

Fig. 10 is a sectional view taken along line 1ΙΪ-1ΙΙ and 25 of Fig. 9 in the direction of the arrows.

Figure 1 schematically shows the suction drying according to the invention in steps. The figure shows the stepwise flow of one dry block in the wear process. In the figure, one tumble dryer plate is marked vllte-30 with the number 10 and the direction of rotation is marked with an arrow L.

In lie A, the tile is located in the sludge basin 11 to be dried.

The step view below shows a cross-section of the filter plate and, as will be seen, a vacuum 35 and a suction are arranged inside the filter plate.

5 76704 1 In lie B, the seed plate is removed from the sludge to be filtered and as shown in the bottom view of the step, the material to be filtered is held against the ceramic tile and vacuum is maintained in the central filter space of the tile so that liquid is absorbed from the material to be filtered. The figure shows the flow of liquid in the slab structure.

In step C, the filter plate 10 is transported to a planing station, where the removal of the filter material 10 deposited on the surface of the device is performed by scraping.

In step D, the purification water is introduced into the central space of the slab and the slab is cleaned with cornice water.

The filter plate 10 shown in Figures 2 and 3 comprises a first air surface 11 and a second air surface 12, between which there is a space 14 filled by the granules 13. This intermediate space acts as a water. The granules are substantially limited to the first surface 11 and the second surface 12. However, they act as a stiffener of the structure and, due to their granularity, do not prevent the liquid entering the central space in question from flowing, since the granules do not cause significant flow resistance. This central space 14 is led by a connection 15 which can be further connected to a bottom source to provide a flow of liquid through the suction surfaces 11 and / or 12 to the central space 14 and further out of the filter plate 10.

25

The joint 15 of the slab and the edges 16 of the slab are reinforced with glaze.

The slab may further be provided with brackets 17. These brackets 17 may act as means for securing the slab 10 to its base.

30 The grain filling space 14 supports the suction pumps 11 and 12 against the pressure.

The suction surfaces 11 and 12 of the slab itself and the granules 13 are preferably made of a ceramic casting composition having the following composition:

35 - clay about 20 Z

- kaolin approx. 30 Z

6 76704 1 - aluminum hydroxide approx. 45 Z and - calcium carbonate approx. 5 Z.

The average particle size of the raw materials is 0.002 mm.

5

The microporous slab using the tiles according to the invention is preferably used for drying a web mill such as paper, a powder such as peat, a granule such as wood, a porous material. The object to be dried is brought into a hydraulic connection with the liquid under vacuum relative to the object to be dried by means of a porous surface filled with liquid.

Figure 4 shows the structure of the suction chisel according to the invention in more detail.

15

The suction dryer device 18 according to the invention comprises suitably a plurality of ceramic filter plates 10. The plates 10 are arranged in a circumferential structure so that the joint 15 of each plate 10 is connected to a central suction tube 19 on the axis of rotation. Each filter plate 10 is connected 20 by a connection 20 to said central pipe 19. The plates 10 are adapted to pass through the basin 21. The basin 21 may be filled with peat or other similar desiccant. A vacuum is applied to the filter plates 10 through the central pipe 19 and the connections 20. Due to the porous structure of the filter plates, the sludge in the basin 21 from which the liquid 25 is intended to be removed travels against the surfaces of the plates 10 under reduced pressure. The water of the sludge from the basin 21 is further absorbed by the vacuum through the air plates 11 and 12 of the filter plates 10 into the central space 14 and further along one 20 into the central pipe 19 and out of the structure.

30

When the filter plates 10 are placed circumferentially around the central tube or shaft 19 and the shaft 19 is adapted to rotate, each filter plate 10 alternately moves into the basin 21 and further rises as the axis of rotation rotates therefrom. As a result of the vacuum, the material to be dried adhered to the tile suction nozzles 11 and 12 rises with the plates 35 and upwards from the basin 21 with the plates 21. The drying of the substance continues during the upward movement, and 7 76704 1 when the substance to be dried, for example peat, has moved to the structure of Fig. 3 A, detachable wiping knives or other removal devices 30 from the material surfaces 11 and 12 of the material and the dried material are transferred away from the connection between the tiles and the device. The structure further comprises a support-5 body 22 adapted to support the basin 21. The basin 21 has an outlet pipe 23. The device further comprises a desiccant storage tank 24, which further has an outlet connection 25. The central rotating shaft and the pipe 19 are adapted to rotate an electric motor.

In the suction blanket 18 according to the invention, the suction surfaces 11 and 12 of the filter plates 10 function specifically as liquid-impregnated suction surfaces, which means that air (or gas in general) does not pass through suction with the pressure differences between air and liquid used in the drying process. In the suction dryer 18 according to the invention, the object to be dried is brought into a hydraulic connection with the liquid placed under a vacuum relative to the object to be dried by means of a suction plug 11 and / or 12 of a fine-porous liquid-impregnated plate 10. The device according to the invention is intended in particular for drying peat, but it must be emphasized that the device in question is also suitable for drying many other substances. It should further be emphasized that the liquid sucked by the device 18 according to the invention may be something else in addition to water.

Figure 5 shows a side view of a pattern structure 30 according to the invention. The scraper body 31 is supported on the support 32 by means of a hinge pin 33 in the middle of the scraper 25 and a sliding shoe 34 at the ends of the scraper. The reading shoes 34 support the pattern in the vertical direction (y) but allow movement in the horizontal plane (x). The rollers 35 at the ends of the scraper 30 rest on the filter plate 10 and hold the scraper at a certain distance from the surface of the filter. The spring 36 presses the supports against the surface 10 of the filter plate.

Since the scraper body 31 is able to pivot on the hinge pin 33, the scraper body 31 always settles parallel to the surface of the filter plate 10 and thus adapts to possible rotational throws. The scraper body 31 is adapted to move about the axis of rotation x * of the hinge pin 33.

35 The scraper blade 40 has three parts. The first blade portions 41 at the ends scrape the surface of the filter completely free of filter cake, while the second second blade portion 42 leaves a pre-coatln, i.e. β 76704 1 thick layer of filter material on the filter surface, the thickness of which can be adjusted by adjusting the rollers 35. The scraping blade portions A1 are so long that the part of the surface of the filter plate 10 which is contacted by the rollers 35 becomes exposed. These first blade parts 41 scrape the surface of the filter 5 clean, whereby a smooth path free of filtered material is formed in the filter plate for the rollers 35 after the blade part 41. In this case, the rollers 35 can be precisely supported on the surface of the filter plate 10. In this way, the exact thickness of the so-called pre-coat, i.e. the filter material left on the surface of the filter plate, can be determined. The arrangement 10 according to the invention contributes to the maintenance of the slab and to the fact that the scraper does not scrape the slab to such a depth that the slab is damaged.

Figure 6 is a kaavarirakenne Figure 5 a top view of the arrow C of Figure 5 in the direction of view. It can be seen from Figure 6 that the scraper body 31 consists of two similar scraper blade support structures 31a and 31b adapted to be located on opposite sides of the plate 10. Scraper structures 31a and 31b are adapted to scrape opposite sides of the plate 10. Figure 6 shows a spring support according to the invention for the pattern structure of a dust angle device. The scraper bodies 32a and 32b supporting the scraper are arranged 20 on the shaft 37. The shaft 37 is adapted to pass through the bores of the frames 32a and 32b. The bores in the support 32a are indicated by the reference number 38a and the drilling in the support 32b is indicated by the reference number 38b. The bore 38a and 38b are dimensioned relative to the shaft 37 so that the shaft 37 moves freely at least in the bore 38b of the support 32b. A spring 36 is fitted to the shaft 37 at its outer end 25a and a screw 37b, preferably a nut, is fitted to the threads of the end 37a of the shaft 37 and press the spring 36 against the side surface 32b 'of the support 32b.

The spring arrangement according to the invention achieves a uniform compressive effect of the blades 41 and 42 30 on the plate 10 and preferably so that both sides of the plate 10 are subjected to the same force caused and applied by the scraper blade, whereby the scraper blade bearing points are not subjected to the scraper blade.

Fig. 7 is a view taken along line I-I of Fig. 5. The view is partially overlaid. The sliding shoes 34 comprise a sliding shoe 34b connected to the scraper body 31. The sliding shoe 34b is connected to the scraper body 31 by a screw 9 76704 13b '. A second sliding shoe 34a is connected to the support 32 by means of a screw 34a 'or some other similar fastening means. Shoes 34a and 34b are arranged to move in the direction of arrow in Figure 6 in the x direction i.e. shoes outer surfaces 34b 'and 34a "is arranged to slide against each other and relative to each other.

The figure shows the surface of the filter plate 10 with reference numeral 10 '. It is scraped clean by the first blade part 41 before the roller 35 shown in Fig. 5. The blade 41 scrapes the bus c for the roller 35. The position of the roller 35 is adapted to adjust relative to the body 31 by adjusting means 351. The adjusting means 351 may consist of a screw 351a fixed in the bore 10 351b of the scraper body 31 to a movable stop pin 352. The stop pin 352 is arranged to abut the roller 35. By turning the screw 351a, the stop pin 352 can be fitted to the desired position in its guide 351b and thus the roller 35 can also be brought to the desired position relative to the body 31, and thus the shaping depth of the scraper blades 41, 42 can be adjusted and e.g. the thickness of the pre-coat layer 15 left on the surface 10 'of the filter plate 10.

The reading shoe 34 has two pairs on each side of the axis of rotation x ', and on each of the scraper bodies 31a and 31b, respectively. Since the structure according to the invention allows the scraper body 31 to rotate on the hinge pin 20 and around its central axis x ', the support arrangement according to the invention gives the scraper 41,42 a certain clearance so that the blades can follow the surface of the filter plates 10 and thus certain surface irregularities. Thus, with the support arrangement according to the invention, not only a uniform load of the filter plate 10 but also a uniform scraping result 25 is formed. The scraper is also unable to damage the surface of the filter plate.

Fig. 8 is a section II-11I of Fig. 5. Fig. 8 shows the attachment of the second blade part 42 leaving the pre-coat to the scraper body 31. The blade 30 42 is fixed and adjusted in position relative to the body 31 by means of a nail 421. The actuating force is provided by the screw 420. The scraper body 31 is adapted to be freely rotatable about the central axis x 'of the hinge pin 33 as indicated by the arrow f. A bore 39 is drilled in the support 32, into which a hinge pin 33 is fitted in the bore 39 so that said pin 33 35 can slide freely in the bore 39. The other end 33a of the hinge pin 33 is threaded 33d to the scraper body 31. The hinge pin 33 has a stop flange 33c 33c '10 76704 1 to slide against the bearing part 33e and the surface 33e *. The purpose of the bearing part 33e is to receive loads along the x 'axis and at the same time said bearing part 33e acts as a bearing element for the rotational movement f. The parts 33e and 33c also act as a bearing structure supporting the structure 5.

Fig. 9 shows a top view of a device solution according to the invention and shows a suction dryer device comprising a plurality of adjacent suction dryer plate wheels, each wheel comprising a plurality of suction dryer plate plates 10. Fig. 9 shows a step in which adjacent suction dryer plates 10 are located between scraper blades 40. In the device arrangement according to the invention, each of the squeegee frames 32a, 32b of the suction dryer plate group is connected to guides 61 and 62 running perpendicular to the plane of the suction dryer plate 10, preferably shafts. There are thus two support shafts 15 and the scraper supports 32a and 32b are arranged on both the shaft 61 and the shaft 62, which shafts act as sliding guides for the cantilever 32a and 32b. A plurality of scraper blade supports 32 are connected to both the shaft 61 and the shaft 62. Each bracket 32a, 32b is thus adapted to move and preferably slide on the shafts 61 and 62 and thus allow the scraper blade 40 to move freely with the scraper blade support straps 32a, 32b on the shaft 62. The movement of the supports 32 on the shafts 61,62 is indicated by the arrow 1 * 2.

Figure 10 shows in more detail the support structures 60 at the ends of the shafts 61 and 62, which are similar. The axes 61 and 62 can be raised and lowered vertically along the y-axis. Said lifting and lowering is arranged to take place by an adjusting device 64 consisting of a screw arrangement comprising a first screw 64 and a second screw 30 65. By turning the screws 64,65, the shafts 61 and 62 can be raised and lowered vertically. In this way, the vertical position of the scraper blade 40 relative to the suction dryer plate 10 can be adjusted. The adjustment device 64 can also change the direction of the longitudinal axis d of the scraper blade 40 with respect to the horizontal plane and thus the angle between said longitudinal axis d and the horizontal plane can be adjusted.

35

The vertical movement of the shafts 61 and 62 is indicated in Fig. 10 by the arrow L 1. The scraper supports 32 comprise, at their outer ends, holes 32 'a 76704 1 and 32 "through which the shafts 61 and 62 are fitted and / or bearings on which the supports slide slide along the shafts. At the same time the height of the horizontal shafts 61 and 62 changes Thus, in order to allow the possibility of movement 5, a certain horizontal clearance must also be allowed for both axes 61 or 62. The clearance can be allowed e.g. .

10

It may also be possible to have a device arrangement in which the end frame 63a is allowed to rotate to the desired position relative to the fixed lower end frame 63b, the shafts 61 and 62 being then fixedly located in the upper end frame 63a. The shaft end support body 63 comprises an upper body portion 63a and a lower body portion 63b and intermediate sleeves and / or spacers 74,75 through which screws 64 are passed. The adjustment of the angular position with respect to the horizontal plane of the scraper blade 40 can also be realized in such a way that the shape of the upper body portion 63a is adapted so as to obtain the desired angle-20 deflection of the scraper blade 40. In this case, the adjustment can be carried out by forming the upper body part 63a and the lower body part 63b in such a way that adapter pieces can be placed between these body parts and thus the angle 0 (. With respect to the filter plate) can be adjusted. Screws 64 and 65 are then set to pass over the upper end. 63a through the screw hole 25 to the lower end frame 63b and the bores of said frames are formed to allow angular changes between the screw 64,65 and the body 63a, 63b. The screws 61,62 press the upper end frame 63a against the lower end frame 63b or separate adapters. , 75 is placed between the upper end frame 63a 30 and the lower end frame 63b.

The suction angle grinder according to the invention comprises a shaft cleaning device 70 in which, by means of a screwdriver 72, a support piece 71 is raised and lowered, comprising a V-shaped shaft support opening 71 ', on which the shaft 61 rests. By turning the screw 72, the garment 71 is raised and lowered and the rotation of the screw takes place in the lug 73 of the fixed frame structure 67 and in relation to the frame beam 67 of said 12 76704 1. The tightening device 70 allows the final precise attachment of the shaft 61 to the desired scraping position.

The openings 32 'and 32 "are preferably provided with bearings 69 which allow the supports 32a and 32b to slide precisely along or along the surfaces of the shafts 61 and 62. To prevent contamination of the guide surfaces of the shafts 61 and 62, the shafts 61,62 are preferably provided with 68 so as to allow, however, the movement (I) of the scraper 32 parallel to the axes 61 and 62.

10 15 20 25 30 35

Claims (6)

A vacuum drying device comprising one or more filter plates (10) of ceramic material, and which filter plate (10) is arranged to be movable in connection with the material to be filtered, a negative pressure being arranged to be inserted inside the ceramic filter plate for causing suction said that the material to be filtered is arranged to adhere to the surface (10 ') of the filter plate (10) and wherein the liquid to be filtered is arranged to suck in the central space of the filter plate (10), characterized in that the suction drying device comprises a scavenger structure (30) comprising a first support member (32a) for the scavenger blades (40) arranged in a relation to the surface plane of the filter plate (10) perpendicularly to the conduit (61 and / or 62). ) And also a second support member (32a) is provided in the conduit (61 and / or 62), which is arranged to support a blade (40) acting on the same filter plate (10) on its opposite side, wherein the supporting means (32a, 32b) are arranged to move in the line (61 and / or 62) in the direction of its longitudinal axis, the supporting means (32a and 32b) of the shear structure (30) being joined to each other. aside, a substantially equal force acts on the opposite surfaces of the filter plate (10). 1 Patent claim Suction drying device according to claim 1, characterized in that the first support means (32a) and the second support means (32b) of the blade (40) connecting to the same suction drying plate are functionally joined to one another by a spring (36 ), wherein the spring (36) is arranged to provide a substantially equal compressive force on the sheave blades (40) to the surface of the filter plate 30 (10) while the sheave blades are arranged to be located on opposite sides of the same filter plate (10) and advantageously opposite each other. Suction drying device according to claim 1, characterized in that the first support means (32a) of the chipper blades is connected to the second support member (32b) of the chipper blades in such a manner.