CN101198392B - Filtration apparatus and filtration method - Google Patents
Filtration apparatus and filtration method Download PDFInfo
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- CN101198392B CN101198392B CN2006800212386A CN200680021238A CN101198392B CN 101198392 B CN101198392 B CN 101198392B CN 2006800212386 A CN2006800212386 A CN 2006800212386A CN 200680021238 A CN200680021238 A CN 200680021238A CN 101198392 B CN101198392 B CN 101198392B
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Abstract
The present invention provides a filtering apparatus reduced in size and having increased dehydration performance, a filtering method capable of increasing dehydration performance. This filtering apparatus comprises cylindrical or conical inner and outer filter media (1) and (2) disposed concentrically to each other and a spiral partition (3) installed in a filtration space (4) between the inner and outer filter media (1) and (2). The spiral partition (3) is not rotated but only the inner filter medium (1) and/or the outer filter medium (2) is rotated around its axis. In this operation step, a treated liquid is fed into the filtration space (4) from its one end, filtrated by passing it through the inner filter medium (1), and filtrated by passing it through the outer filter medium (2). The filtrated liquid is discharged to the outside, and cakes are discharged from the other end of the filtration space (4).
Description
Technical field
The present invention relates to filter and filter method.
Background technology
The filter medium of metal sieve, net, porous plate etc. is compared with the filter medium of cloth (fiber) system, therefore in aspect superior performances such as runnability, maintainability, durability, the adding pressure type filter of the screw press formula of having utilized these filter mediums and rotation adding pressure type dewaterer etc. is arranged.These devices are historical remote, be very simply to construct, therefore the characteristics that have low power, low noise, low cost etc., even be applied to also can obtain superior dewatering under the situation of solidliquid mixture of the low difficulty of solid component concentration dehydration, so be used for sewage sludge dehydration field more.(for example with reference to patent documentation 1,2)
Patent documentation 1: TOHKEMY 2001-212697 communique;
Patent documentation 2: TOHKEMY 2001-113109 communique.
Yet, in the screw press formula dewaterer that constitutes by the outside cylindraceous filter medium and its inner helical part of insertion, processed liquid from entrance side when outlet side is transferred by low speed, utilization is dewatered continuously by the squeeze pressure of the fastening force generation of helical part, but filtered fluid can only be extruded from outside filter medium, therefore be difficult to shorten the length of outside filter medium, thereby be difficult to make device miniaturization.
And in rotation adding pressure type dewaterer, in order to improve the treating capacity of dewatering and filtering, need add the diameter of deep bid or dispose a plurality of dewaterers, this has caused the maximization of setting and the problems such as increase of cost.
Summary of the invention
Therefore, provide can the implement device miniaturization and can improve the filter and the filter method of dewatering for major subjects of the present invention.
In order to solve above-mentioned problem, the present invention is as described below.
The described invention of first aspect is a kind of filter, and this filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium, described filter constitutes, distolateral processed liquid is sent into from one of described filter space, in the filter space another is distolateral discharges filter cake (cake), and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium, described filter is characterised in that, described inboard filter medium and/or described outside filter medium rotate around the axle center, and described spiral helicine partition wall does not rotate.
Two faces by inboard filter medium and outside filter medium carry out filtering and concentrating, can realize the equipment more in the past than the screw press formula miniaturization of only filtering with outside filter medium thus.And, because inboard filter medium and/or outside filter medium rotate around the axle center, spiral helicine partition wall does not rotate, so the processed liquid that is admitted in the filter space is moving along partition wall on one side with installing the inside spin shape, at first carry out filtering and concentrating on one side by interior outside filter medium, carry out extrusion dehydration then, with not only in the screw press formula filter of the structure that also together rotates freely of the outside filter medium and spiral shape thing (ribbon screw) compare, filter of the present invention can simplified construction, reduce manufacturing cost and improve maintainability.
The described invention of second aspect is a kind of filter, and this filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium, described filter constitutes, distolateral processed liquid is sent into from one of described filter space, in the filter space another is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium, described filter is characterised in that, described inboard filter medium and/or described outside filter medium rotate around the axle center, described spiral helicine partition wall does not rotate, and described partition wall is supported by a support unit distolateral and/or that another is distolateral that is fixed on described filter space.
Because partition wall is the structure that is supported by a support unit distolateral and/or that another is distolateral that is fixed on filter space, so can guarantee therefore can carry out stable filtration operation and can improve dewatering from following the raising of intensity and the keeping of shape of the partition wall that the processed liquid that transports and move and filter cake meet with stresses.
The described invention of the third aspect is on the basis of the described filter of second aspect, described support unit is configured to scrape the structure that is taken at the filter cake that adheres on the filter medium near to or in contact with in described inboard filter medium and/or described outside filter medium to become.
Because support unit is configured to scrape the structure of getting attached to the filter cake on the filter medium near to or in contact with in inboard filter medium and/or outside filter medium, thus scraper plate needn't be established in addition, thus can cut down number of spare parts, reduce manufacturing cost.
The described invention of fourth aspect is a kind of filter, and this filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium, described filter constitutes, distolateral processed liquid is sent into from one of described filter space, in the filter space another is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium, described filter is characterised in that, described inboard filter medium and/or described outside filter medium rotate around the axle center, described spiral helicine partition wall does not rotate, one distolateral distolateral along with from described filter space to another, the size decreases of the perforate of the filtering surface in described inboard filter medium and/or the described outside filter medium.
Because distolateral distolateral along with from filter space to another, the size decreases of the perforate of the filtering surface in inboard filter medium and/or the outside filter medium, so it is low and have the distolateral of the many filter spaces of mobile processed liquid at solid component concentration, mainly carry out filtering and concentrating, distolateral at another of the many filter spaces of the low and filter cake of moisture content, mainly carry out the densification dehydration, thereby can improve the dewatering and SS (mud) rate of recovery.
The described invention in the 5th aspect is a kind of filter, and this filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium, described filter constitutes, distolateral processed liquid is sent into from one of described filter space, in the filter space another is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium, described filter is characterised in that, described inboard filter medium and/or described outside filter medium rotate around the axle center, described spiral helicine partition wall does not rotate, the filter cake outlet of another the distolateral formation in described filter space is provided with the back pressure plate that is used to push filter cake.
The described invention in the 6th aspect is on the basis of described filter aspect the 5th, and described back pressure plate constitutes, and can regulate the area of section of the discharge section of described filter cake outlet.
Because another the distolateral filter cake outlet in being formed at filter space is provided with the back pressure plate that is used to push filter cake,, therefore can reduce the moisture content of filter cake effectively so filter cake is pushed with axial these two different directions from radial direction.
And, because the back pressure plate constitutes the area of section of the discharge section that can regulate the filter cake outlet, adjust the extruding force (discharge resistance) that imposes on filter cake so can wait according to the composition of filter cake and operational situation.
The described invention in the 7th aspect is on the basis of the described filter of either side in aspect first to the 6th, the inner periphery of sending into oral-lateral and the neighboring of the processed at least liquid of described spiral helicine partition wall are respectively near to or in contact with in described inboard filter medium and described outside filter medium.
Owing to the solid component concentration of the processed liquid that is admitted to filter space is low, be to have mobile state, so near the entrance side of processed liquid, outside filter medium generation filtering and concentrating in utilizing.Therefore, near sending into the oral-lateral of this processed liquid, though the filtering and concentrating based on the Separation of Solid and Liquid effect is an important function, but by means of the inner periphery of sending into oral-lateral of the processed at least liquid of spiral helicine partition wall and neighboring respectively near to or in contact with in inboard filter medium and outside filter medium, the filter cake that adheres on the filtering surface that is taken at filter medium can be scraped, thereby filtering and concentrating efficient can be kept.And the processed liquid that is admitted to can move along the partition wall helically.
On the basis of the described filter of either side of the described invention of eight aspect in aspect first to the 6th, described inboard filter medium and described outside filter medium, the mode that can have speed difference with the rotary speed of the rotary speed of described inboard filter medium and described outside filter medium is rotated.
Inboard filter medium and outside filter medium, the mode that can have speed difference with the rotary speed of the rotary speed of inboard filter medium and outside filter medium is rotated, thereby produces shear strength on the filter cake that moves in filter space.Therefore, for example,, can improve dewatering efficiency by this shear strength for containing the many fresh sludges of fibre composition or the processed liquid of mixing sludge.And, under the big situation of the relative velocity of interior outside filter medium, shown effect rotating near the filtering surface (for example filtering surface of inboard filter medium) faster filter cake to another filtering surface (for example filtering surface of outside filter medium) side shifting, thereby therefore the immixture in the generation filter cake can also make being evenly distributed of moisture content in the filter.
The described invention in the 9th aspect is that described spiral helicine partition wall is constituted as on the basis of the described filter of either side in aspect first to the 6th, and along with distolateral another is distolateral to described from described one, helix pitch shortens.
Because spiral helicine partition wall is constituted as distolateral distolateral to another along with from filter space, helix pitch shortens, so the discharge path of filter cake narrows down, thereby can improve squeezing effect, the moisture content (distribution) that makes the filter cake of discharge does not have difference but uniformly.
The invention of the tenth aspect is a kind of filter method, it is characterized in that, described filter method uses filter, and described filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium, described spiral helicine partition wall does not rotate, only described inboard filter medium and/or described outside filter medium rotate around the axle center, in this operating process, processed liquid is from distolateral sending in the described filter space of described filter space, and filter by described inboard filter medium and described outside filter medium, each filtered fluid is discharged to the outside, and, another the distolateral discharge filter cake in the described filter space.
The invention effect
According to the present invention, advantage such as miniaturization that can implement device and dewatering raising.
Description of drawings
Fig. 1 is the longitudinal section of the filter of first embodiment.
Fig. 2 is the I-I cutaway view (sectional elevation) of filter shown in Figure 1.
Fig. 3 is the vertical view of the filter of first embodiment.
Fig. 4 is the schematic diagram that is used to illustrate the relation of partition wall and scraper plate.
Fig. 5 is the schematic longitudinal section of other embodiment of filter.
Fig. 6 is the schematic longitudinal section of other embodiment of filter.
Fig. 7 is the schematic longitudinal section of other embodiment of filter.
Fig. 8 is the schematic longitudinal section of other embodiment of filter.
Fig. 9 is the sectional elevation of the filter of second embodiment.
Figure 10 is the schematic diagram that is used to illustrate the storage area.
Figure 11 is the embodiment that other processed liquid are sent into pipe.
Figure 12 is the longitudinal section of the filter of the 3rd embodiment.
Figure 13 is the II-II cutaway view (sectional elevation) of filter shown in Figure 12.
Figure 14 is the schematic sectional elevation that is used to illustrate other configuration modes of support unit.
Figure 15 is the schematic sectional elevation that is used to illustrate the another configuration mode of support unit.
Figure 16 is the schematic plan of transporting accessory of the 4th embodiment.
Figure 17 is the partial front elevation view of transporting accessory of the 4th embodiment.
Figure 18 is the schematic plan of transporting accessory (during elongation) of other embodiment.
Figure 19 is the schematic plan of accessory when dwindling of transporting shown in Figure 180.
Figure 20 is the vertical view of configuration of back pressure plate of the filter of the 5th embodiment.
Figure 21 is the longitudinal section (III-III cutaway view) of configuration of back pressure plate of the filter of the 5th embodiment.
Figure 22 is the vertical view of state of having pulled down the part of back pressure plate.
Figure 23 is the schematic diagram of variation of area of section that the mobile space of filter cake is shown.
Figure 24 is the vertical view of other embodiment of filter.
Figure 25 is the longitudinal section (IV-IV profile) of filter shown in Figure 24.
Figure 26 is the vertical view of other embodiment of the configuration of back pressure plate.
Figure 27 is the longitudinal section (V-V cutaway view) of Figure 26.
Figure 28 is the vertical view that the rotary state of movable back pressure plate is shown.
Figure 29 is the vertical view of other embodiment of filter.
Figure 30 is the longitudinal section (VI-VI cutaway view) of filter shown in Figure 29.
Label declaration
The inboard filter medium of 1-; The 1A-upper plate; 2-outside filter medium; The 3-partition wall; The 3C-notch; The 4-filter space; 5-inner core rotating shaft; The 7-housing; The 7A-upper plate; The 7B-base plate; The 7C-inclined plane; The inboard scavenge pipe of 8-; 9-outside scavenge pipe; The processed liquid of 10-is sent into mouth; The processed liquid of 10A-is sent into mouth; The processed liquid of 11-is sent into mouth; The processed liquid of 11A-is sent into mouth; 12-filtered fluid outlet; 13-filtered fluid outlet; 14-filter cake outlet; 15-back pressure plate; 15A-is the back pressure plate fixedly; The movable back pressure plate of 15B-; The 16-scraper plate; The 17-storage area; The 18-post; The 19-support unit; The 20-support unit; 24-transports accessory; 25-transports accessory; The 26-endless member; The 36-hub; The 37-arm.
The specific embodiment
Below, according to Fig. 1 to Figure 30 embodiments of the present invention are described.
＜the first embodiment 〉
(formation of filter)
As depicted in figs. 1 and 2, inside at the housing 7 of filter of the present invention has: the cylindraceous inboard filter medium 1 that can rotate freely, its upper plate 1A is attached on the inner core rotating shaft 5, and by first rotating driving device (not shown) transmission of drive force such as motor; The outside cylindraceous filter medium 2 that can rotate freely, it is the configuration of concentric shape ground with this inboard filter medium 1; The partition wall 3 of helical form (spiral shape), its both ends are fixed on the upper plate 7A and base plate 7B of housing 7, and this partition wall 3 is configured between inboard filter medium 1 and the outside filter medium 2 in the formed filter space 4.Need to prove that housing 7 is cylindrical shape in the present embodiment, but be not limited to this, also can be the shape of polyhedron etc.
As depicted in figs. 1 and 2, on the projection section in the base plate 7B of housing 7, filter space 4, be formed with processed liquid and send into mouth 10,11, send into mouth 10,11 from these processed liquid and send into processed liquid.Need to prove that processed liquid is by pump (not shown) force feed, and the pressure by pump and the frictional force that produces because of the rotation of inboard filter medium 1 and outside filter medium 2 rise to top from the bottom of housing 7.In addition, thereby when self axle center landscape configuration of device is installed whole landscape configuration, also can not use pump to come the processed liquid of force feed, but only the frictional force that rotation produced by inside material 1 and material outside 2 make processed liquid mobile in device.In addition, processed liquid is sent into mouth two places in the present embodiment, but is not limited to two places.
Open in the side of inboard filter medium 1 (outer peripheral face) and to be provided with the wedge type silk screen and to be used as filter medium, the slit of this wedge type silk screen is arranged along axis of rotation.Be fed between inboard filter medium 1 and outside filter medium 2 in the processed liquid in the formed filter space 4, a part that has been implemented the filtered fluid after the Separation of Solid and Liquid is stored on the base plate 7B in the inboard filter medium 1, housing 7, and finally discharges from filtered fluid outlet 12.
Here, even inboard filter medium 1 and outside filter medium 2 with unequal angular velocity (°/sec) rotation, also can produce and the corresponding difference of semidiameter (mm/sec) separately, therefore, can improve dewatering efficiency thereby on filter cake, produce shear strength.For example, for containing the many fresh sludges of fibre composition or the processed liquid of mixing sludge, in order more effectively to produce shear strength, so that inboard filter medium 1 and outside filter medium 2 rotate in mode with some angular velocity difference, thereby can further improve dewatering efficiency.And, under the big situation of the relative velocity of inboard filter medium 1 and outside filter medium 2, show effect rotating near the filtering surface (filtering surface of for example inboard filter medium 1) faster filter cake to another filtering surface (for example filtering surface of outside filter medium 2) side shifting, thereby in filter cake, produce immixture, therefore can also make being evenly distributed of moisture content in the filter.
Like this, the angular velocity difference of the filtering surface of outside filter medium 1,2 applies shear strength to filter cake in utilizing, thereby improve dewatering efficiency, but this effect exists with ... the character and the state of object filter cake, so under situation, preferably cooperate the character of filter cake and state to set inside and outside angular velocity difference with the optimum state running.Therefore, in order to adjust angular velocity difference easily, outside filter medium 1,2 is provided with the rotating driving device of independent motor etc. in being respectively in the present embodiment.
And applying under the situation of shear strength according to filter cake properties and state, filter cake flows also can bring negative effect to dehydration property sometimes, therefore, preferably rotates with unequal angular velocity under these circumstances.In addition, produce dehydrating effect for utilizing shear strength, and filter cake properties and state are through the long-time filter cake that all less changes, inside and outside side filter medium 1,2 is rotated with unequal angular velocity, for such object filter cake, outside filter medium 1,2 rotates with unequal angular velocity in can making by a motor.
And, for inboard filter medium 1 and outside filter medium 2, the both is rotated, also can only make a rotation.
Filter medium as outside filter medium 1,2 in being used for is not limited to the wedge type silk screen, also can use perforated board (not shown), wire netting (not shown), filter cloth (not shown) etc.In addition, can also be in the bottom of the filter space 4 that mainly carries out Separation of Solid and Liquid configurating filtered the high wedge type silk screen of aperture opening ratio, at the perforated board of the top of the filter space 4 that mainly carries out extrusion dehydration configuration with the contact area height (aperture opening ratio is low) of filter cake.
As shown in Figure 1 and Figure 4, partition wall 3 is helical form (spiral shapes), and is configured in the filter space 4 by formed ring-type between inboard filter medium 1 and the outside filter medium 2.This partition wall 3 is fixed on the upper plate 7A and base plate 7B of housing 7, thereby dividing plate 3 is can be around the structure of axle center rotation.By like this, to compare with the screw press formula filter that interior outside filter medium and spiral shape thing all can constitute with rotating freely, filter of the present invention can implementation structure be simplified, manufacturing cost reduces and maintainability improves.
The inner periphery and the neighboring of partition wall 3 constitute, respectively near to or in contact with in the filtering surface of inboard filter medium 1 and outside filter medium 2.By this structure, be easy to scrape the filter cake of getting attached on the filtering surface of interior outside filter medium 1,2, can keep the efficient of filtering and concentrating, and can make from processed liquid send into mouthful 10,11 processed liquid of sending into along partition wall 3 in the shape of a spiral shape rise.And, owing to the bottom of filter space 4, be that processed liquid is sent near the filtering and concentrating of mainly carrying out mouthful 10,11 sides based on the Separation of Solid and Liquid effect, so the inner periphery of partition wall 3 and neighboring are so long as following structure gets final product, that is: processed at least liquid sends near mouthful 10,11 sides respectively near to or in contact with in interior outside filter medium 1,2.
In addition, as shown in Figure 4, the scraper plate 16 that is formed by rubber etc. is installed in the inner periphery of partition wall 3 and neighboring, owing to be that partition wall 3 non-rotary structures are got the filter cake that filtering surface captures so enough this scraper plates 16 of energy are scraped around the axle center rotation for inboard filter medium 1 and outside filter medium 2.And, as mentioned above, the bottom of filter space 4, be that processed liquid is sent near the filtering and concentrating of mainly carrying out mouthful 10,11 sides based on the Separation of Solid and Liquid effect, so as long as at least processed liquid send into mouthful 10,11 sides near scraper plate is installed.
Though partition wall 3 can be helix pitch whole the same structures in whole filter space 4, but for the moisture content (distribution) that makes the filter cake that will discharge does not change but uniformly, as Fig. 1 and shown in Figure 4, the such structure of preferred employing, that is: along with from the base plate 7B side of housing 7 to upper plate 7A side, the spacing of spiral helicine partition wall 3 shortens, and specifically, preferably helix pitch shortens, the discharge path of filter cake narrows down by making in the top of filter space 4 part improves squeezing effect.On the other hand, described later extremely shown in Figure 8 as Fig. 5, when the semidiameter of outside filter medium 1,2 diminishes in making in order to improve dewatering efficiency on the top of filter space 4, also can be along with from the base plate 7B side of housing 7 to upper plate 7A side, the structure that the spacing of spiral helicine partition wall 3 is elongated, this structure is not shown.
In addition, though not shown, also can on the part of spiral helicine dividing plate 3, wear the hole that filter cake can pass through, can promote mixing of filter cake like this.In addition, in the bottom of filter space 4, be that processed liquid is sent near mouthful 10,11 sides, also setting (blocking the bottom of spiral helicine partition wall 3) can be separated in the bottom of partition wall 3 with the base plate 7B of housing 7, at this moment, the base plate 7B of partition wall 3 and housing 7 fixing fixes by support unit arbitrarily (columnar part of post 18 grades shown in Figure 10 for example described later etc.) and gets final product.
As shown in Figure 1 and Figure 4, scraper plate 16 housing 7 axially on along the inner periphery and the neighboring of partition wall 3, install as both ends with the upper plate 7A and the base plate 7B of housing 7.In Fig. 4, this scraper plate 16 is in inner periphery and neighboring one place to be installed respectively, but also many places can be installed.In addition, as its variation, also can only scraper plate 16 be installed in the bottom of the filter space 4 that mainly carries out Separation of Solid and Liquid.Installation method in this case can be only to be arranged on the base plate 7B of housing 7, and base plate 7B and the partition wall 3 that also can be arranged to housing 7 link, and also can be arranged to the binding of putting up a bridge each other at the edge of axially adjacent partition wall 3.In addition, not scraper plate 16 to be mounted to be parallel to axially, but, at their front end scraper plate 16 be installed respectively that this structure is not shown along the inner periphery and the neighboring of partition wall 3.
The material of scraper plate self, structure are as previously described, can adopt and to push rubber, resin of filtering surface etc. by elastic force, can also adopt such structure etc. as variation in addition, that is: at the front loaded blade that spring is installed of scraper plate, thereby has the function that blade can be moved by spring etc. at the radial direction of inboard filter medium 1 and outside filter medium 2.
The relation of inboard filter medium 1, outside filter medium 2 and partition wall 3 is described here.Processed liquid from the base plate 7B that is formed on housing 7 described later is sent into mouthful 10,11 processed liquid of sending into, be that solid component concentration is low and have a mobile state, in the bottom of filter space 4, carry out filtering and concentrating by the perforate of the filter medium cylindraceous in inboard filter medium 1 and the outside filter medium 2.In the bottom of filter space 4, be important function based on the filtering and concentrating of Separation of Solid and Liquid effect, but concentrate when proceeding to a certain degree that the filter cake that has been concentrated causes the filter efficiency reduction attached on the filtering surface when filtering.Therefore,, scraper plate 16 is set on partition wall 3, high-frequency scraping is carried out on the filter medium surface in inboard filter medium 1 and the outside filter medium 2, thereby struck off attached to lip-deep filter cake in order to keep thickening efficiency.
In addition, owing to inspissation has lost mobile filter cake and filter medium generation frictional force, therefore, the circumferencial direction of filter cake along interior outside filter medium 1,2 can be transported by the filter medium that rotates.But, in filter space 4, dispose the partition wall 3 of helical form (spiral shape), along the filter cake of interior outside filter medium 1,2 rotations owing to interfere with this partition wall 3, and when with the axle being the center rotation also along moving axially.By this motion, filter cake is filtered concentrated, and finally discharges from the filter cake outlet 14 on the top that is formed on filter space 4.And, at filter cake outlet 14 the back pressure plate 15 that is used to suppress the filter cake discharge is installed, by suppressing discharge rate forcibly, filter cake is compressed in filter space 4, thereby further reduce moisture content, more than will be explained below.
The filter space 4 that embodiment relates to is the circuluses that have same cross-sectional area from top to bottom, but the bottom of filter space 4 has jumbo filter chamber volume, so that guarantee treating capacity, and the semidiameter of outside filter medium 1,2 diminishes in the top of filter space 4 preferably makes, so that improve dewatering efficiency.Specifically be, as shown in Figure 5, under the identical state of the shape maintenance of outside filter medium 2, along with send into mouthful 10,11 side direction filter cake outlets, 14 sides from processed liquid, inboard filter medium 1 enlarges (cone shape substantially) continuously at radial direction, perhaps as shown in Figure 6, the shape that enlarges (multistage drum) steppedly.In addition, as shown in Figure 7, under the shape of inboard filter medium 1 kept identical state, along with sending into mouthful 10,11 side direction filter cake outlets, 14 sides from processed liquid, outside filter medium 2 dwindled continuously at radial direction, or as shown in Figure 8, dwindles steppedly.
As depicted in figs. 1 and 2, inboard scavenge pipe 8 is along the inner peripheral surface of inboard filter medium 1 and be provided with, and, a plurality of washer jet 8A, 8A ... be installed on the inboard scavenge pipe 8 in the mode relative with the inner peripheral surface of inboard filter medium 1.Similarly, outside scavenge pipe 9 is along the outer peripheral face setting of outside filter medium 2, and, a plurality of washer jet 9A, 9A ... be installed on the scavenge pipe 9 of the outside in the mode relative with the outer peripheral face of outside filter medium 2.And, inboard filter medium 1 is pivoted with outside filter medium 2, on one side from these a plurality of washer jet 8A, 8A ..., 9A, 9A ... jet cleaning liquid, with to the obstruction of inboard filter medium 1 and outside filter medium 2 filtering surface clean.The cleaning fluid that sprays when cleaning is as cleaning on waste liquid is stored in the housing 7 inboard filter medium 1 in filtered fluid the base plate 7B and on the base plate 7B of the housing 7 of the part between housing 7 and the outside filter medium 2, and finally from 12,13 discharges of filtered fluid outlet.
Be that inwardly outside filter medium 1,2 high-pressure injection cleaning fluids clean, but the alkaline medicine of preferred injection clean as cleaning fluid herein.In addition, preferably on the filtering surface of interior outside filter medium 1,2, ultrasound transmitter device is set, so that make filter medium self vibrate the cleaning force that improves when cleaning.
And the position that is provided with of interior outside scavenge pipe 8,9 and washer jet 8A, 9A is not limited to the above, also can be arranged in the filter space 4, and washer jet (not shown) is installed on the partition wall 3 etc., thereby in the filter space 4 the jet cleaning liquid.In addition, interior outside scavenge pipe 8,9 also can be provided with many places.
As shown in Figure 3, parts in the upper plate 7A of housing 7,4 projections of filter space are formed with filter cake outlet 14, and the filter cake that has dewatered is from discharging here.At these filter cake outlet 14 places back pressure plate 15 is installed, produces by this back pressure plate 15 and discharge resistances and adjust, can further push filter cake thus, realize the reduction of moisture content and the reduction of volume with amount to the mud of being discharged.
(filter method)
The following describes the filter method that has adopted the filter that the present invention relates to.
At first, processed liquid is delivered to processed liquid with pump pressure send into mouth 10,11, and processed liquid is sent in the filter space 4.The processed liquid that is admitted in the filter space 4 rises along partition wall 3 helicallies on one side, Yi Bian utilize inboard filter medium 1 and outside filter medium 2 to carry out two-face filtering.Inboard filter medium 1 and outside filter medium 2 rotate by first and second rotating driving devices (not shown) of motor etc. respectively.At this moment, inboard filter medium 1 is rotated respectively in identical direction in the mode with speed difference with outside filter medium 2.Need to prove that inboard filter medium 1 and outside filter medium 2 might not be wanted both's rotation, also can be a rotation.
Processed liquid rises along partition wall 3 under the effect of the frictional force of pressure that pump pressure is sent and rotation, Separation of Solid and Liquid is carried out in the bottom of the filter space 4 between inboard filter medium 1 and outside filter medium 2, extrusion dehydration is carried out on top at filter space 4, and the filter cake after finally will dewatering from formed filter cake outlet 14 is discharged.
Top in filter space 4, having implemented the high filter cake of the moisture content after the Separation of Solid and Liquid rises, and the discharge resistance that the spin friction of inboard filter medium 1 and outside filter medium 2 and back pressure plate 15 are produced has promoted the extruding to this filter cake, thereby reduction in bulk when moisture content reduces, and from 14 discharges of filter cake outlet.
＜the second embodiment 〉
In the first embodiment, illustrated that mainly the place that processed liquid is sent into is the situation at one, two places.Sending into mouth as if processed liquid is one, two places, then can produce solid component concentration and filtration pressure difference distribution along transfer direction in stream, thereby the situation away from the filtering and concentrating performance reduction in the place of sending into mouth might occur.
And, because processed liquid has viscosity,, apply extra pressure, thereby solid constituent is flowed out from filter medium so just need apply pressure more than the filtration pressure difference in order to ensure the flowability in the stream, cause rate of recovery reduction.
Therefore, in second embodiment, increase processed liquid and send into mouth, in the hope of improving the filtering and concentrating performance and the SS rate of recovery.
As shown in Figure 9, parts in the base plate 7B of housing 7,4 projections of filter space, be formed with processed liquid send into a mouthful 10A, 10A ..., processed liquid from these processed liquid send into a mouthful 10A, 10A ... send into.Send into mouth by forming the processed liquid in many places, can make concentration, the pressure distribution of putting into processed liquid later in the filter space 4 even, the filtering and concentrating performance based on filter space 4 bottoms of the filtering and concentrating of Separation of Solid and Liquid effect is mainly carried out in raising.In addition, form the processed liquid in many places and send into mouth, send into the situation of mouth compares with the processed liquid in formation one, two places, do not need to apply the extra pressure of having considered the pressure loss, thereby can prevent that solid constituent from flowing out from filter medium, can realize the raising of the SS rate of recovery (%), and can not bring unnecessary burden to filter.Further, because the flow path length of transporting processed liquid is shortened in fact,, help to improve the SS rate of recovery (%) so can reduce the pressure loss.
Processed liquid send into a mouthful 10A, 10A ... be 4 places in the present embodiment, but be not limited to this, get final product so long as form many places (more than preferred 3 places, being more preferably more than 4 places).
Here, other modes as processed liquid is sent into mouthful can also propose mode shown in Figure 11.In this mode, linking at the central portion of housing 7 has processed liquid to send into pipe 11, and its fore-end runs through the side of inboard filter medium 1 and forms processed liquid and send into a mouthful 11A.Send into pipe 11 at this processed liquid and rotate along with the rotation of inboard filter medium 1, when being formed on processed liquid on the side of inboard filter medium 1 and sending into mouthful 11A and also rotate, processed liquid is fed in the filter space 4.Because the processed liquid that is formed on the side of inboard filter medium 1 is sent into mouthful 11A and on one side processed liquid is sent in the circumferencial direction rotation on one side, so processed liquid is easy to stir in filter space 4, thereby can further make the concentration of processed liquid, pressure distribution even.In Figure 11, it is 1 place that this processed liquid is sent into mouthful 11A, but is not limited to this, also many places can be installed.Need to prove that as shown in figure 11, the part of filtered fluid in the processed liquid, that implemented Separation of Solid and Liquid is discharged from the filtered fluid outlet 12 on the base plate 7B that is formed on housing 7.In addition, in mode shown in Figure 11, omitted inboard scavenge pipe 8 for the purpose of making things convenient for, it is also passable that inboard scavenge pipe 8 is installed certainly.
Further, processed liquid is sent into the side that mouthful 11A is not limited to be formed on inboard filter medium 1, though not shown, also can be formed on the side of outside filter medium 2, can also be formed on inboard filter medium 1 and outside filter medium 2 side separately.
As shown in figure 10, in the bottom of filter space 4, be processed liquid send into a mouthful 10A, 10A ... near the side, setting (blocking the bottom of spiral helicine partition wall 3) is left from the base plate 7B of housing 7 in the bottom of partition wall 3, so can also form the space (storage area 17) of the ring-type that surrounds by inboard filter medium 1 and outside filter medium 2.This storage area 17 plays a role as being used to store the space of processed liquid.By with processed liquid from the processed liquid that in this storage area 17, is formed with many places send into mouthful 1 0A, a 10A ... the structure of sending into can promote the concentration of processed liquid, the homogenising of pressure distribution.Particularly, send into a mouthful 11A, can further promote the homogenising of concentration, pressure distribution by the processed liquid that adopts mode shown in Figure 11 in the lump.Need to prove that the partition wall 3 of this moment and the base plate 7B of housing 7 fixing for example links parts (support unit) arbitrarily by post 18,18 etc. to be fixed and get final product.
Because other structures are identical with first embodiment, so detailed.And, adopted the filter method of filter of second embodiment also identical, so detailed with first embodiment.
＜the three embodiment 〉
Because the spiral helicine partition wall that illustrates in first embodiment bears from the processed liquid that moves and the excessive stress of filter cake, so, require to improve the intensity of this partition wall and keep shape from the viewpoint of stable filtration operation etc.
Therefore, in the 3rd embodiment, wish to improve the intensity of partition wall and keep shape, filtration operation can be stably carried out in hope.
As Figure 12 and shown in Figure 13, partition wall 3 is helical form (spiral shapes), and be configured in the filter space 4 that is formed at the ring-type between inboard filter medium 1 and the outside filter medium 2, in the 3rd embodiment, this partition wall 3 is fixed on the upper plate 7A and base plate 7B of housing 7, and be installed on the support unit 19 described later, are the structures of not rotating thereby form partition wall 3 around the axle center.
Along with transporting, on partition wall 3, bear from the processed liquid that moves and the stress of filter cake, for the mechanical strength that improves the spiral helicine partition wall 3 that bears this stress, keep shape, in the 3rd embodiment, as Figure 12 and shown in Figure 13, support unit 19 partly is installed in the substantial middle of spiral helicine partition wall 3.The end of this support unit 19 is fixed on the upper plate 7A and/or base plate 7B of housing 7, and by support unit 19 supporting partition walls 3, guarantees the raising of intensity and keeping of shape thus, thereby can carry out stable filtration operation and can improve dewatering.Figure 12 equally spaced is equipped with 4 places with support unit 19 shown in Figure 13 in the substantial middle mode partly that is connected spiral helicine partition wall 3 on partition wall 3, but is not limited to this, as long as install more than at least one place.In addition, support unit 19 is not only column (bar-shaped), also can be flat bar shape etc.Need to prove that the configuration of the configuration of Figure 12 and support unit 19 shown in Figure 13 and Figure 14 described later and support unit 20 shown in Figure 15 is compared, keeping efficient height aspect the intensity, and superiority is also arranged aspect cost.
Except the configuration mode of Figure 12 and support unit 19 shown in Figure 13, the configuration mode of Figure 14 and support unit 20 shown in Figure 15 can also be proposed.The both ends of support unit 20 also are fixed on the upper plate 7A and base plate 7B of housing 7, but support partition wall 3 by the both ends on the width of spiral helicine partition wall 3, and respectively near to or in contact with in interior outside filter medium 1,2.In addition, in Figure 14 and Figure 15, omitted the diagram of interior outside scavenge pipe 8,9 etc.
The configuration of support unit 20 shown in Figure 14 is such modes, that is: two support units 20,20 form in inboard filter medium side and outside filter medium side respectively a pair of, thereby support in the mode at the both ends of clamping partition wall 3.In mode shown in Figure 14, the group of two support units 20,20 is formed with 4 places, but is not limited thereto, as long as it is above to form a place.At this moment, owing to dispose support unit 20, so become the resistance that transports of the processed liquid that transports and filter cake in the mode at clamping partition wall 3 both ends.Therefore, particularly low and bottom part that have many filter spaces 4 of mobile processed liquid adopts this configuration mode at solid component concentration, can be owing to transporting the percent consolidation that resistance improves processed liquid, thus can improve dewatering.
The configuration of support unit 20 shown in Figure 15 is different with configuration mode shown in Figure 9, is not with support unit 20 in inboard filter medium side and outside filter medium side toward each other, but configuration each other, and the end of supporting partition wall 3 with staggering.In mode shown in Figure 15, support unit 20 respectively is formed with 4 places respectively in inner periphery and the outer periphery, but is not limited to this, as long as it is above to form a place.At this moment, also become the resistance that transports of the processed liquid that will transport and filter cake in the same manner with configuration mode shown in Figure 14, but owing to be the configuration of staggering each other, so littler than configuration mode resistance shown in Figure 14.Therefore, particularly the top part at the many filter spaces 4 of the low filter cake of moisture content adopts this configuration mode, can reduce resistance, thereby be easy to transport.
The configuration mode of Figure 13, Figure 14 and support unit shown in Figure 15 can suitably be used in combination, as mentioned above, for example also can adopt the configuration mode of support unit 20 shown in Figure 14 in the bottom of filter space 4 part, adopt the configuration mode of support unit 20 shown in Figure 15 in the top of filter space 4 part.And, though the shape of illustrated support unit 20 is flat bar shapes, also can be column (bar-shaped).
Installation about the scraper plate 16 in the configuration mode of Figure 14 and support unit 20 shown in Figure 15, though it is not shown, but both can be installed in the inboard filter medium side of support unit 20, make scraper plate 16 near to or in contact with in inboard filter medium 1, also can not be installed on the support unit 20, but be installed in the end of partition wall 3 in addition.In addition, Figure 14 and support unit 20 shown in Figure 15 are configured to respectively near to or in contact with in interior outside filter medium 1,2, thereby also can have the function of above-mentioned scraper plate.By support unit 20 is also used as scraper plate, can cuts down number of spare parts, thereby can reduce manufacturing cost.
In addition, though not shown, identical with first and second embodiments, on the part of spiral helicine partition wall 3, wear the hole that filter cake can pass through, thereby can also promote mixing of filter cake.In addition, in the bottom of filter space 4, be that processed liquid is sent near mouthful 10,11 sides, the bottom of partition wall 3 and the base plate 7B of housing 7 can also be provided with (bottom of transversal spiral helicine partition wall 3) dividually, in this case, the base plate 7B's of partition wall 3 and housing 7 fixedly fixedly forms by support unit 19.
About other structures, since identical with first and second embodiments, so omit its detailed description.In addition, because the filter method of the filter of use the 3rd embodiment is also identical with first and second embodiments, the Therefore, omited describes in detail.
＜the four embodiment 〉
For the filter medium that has illustrated in the first embodiment, require further to improve filtering and concentrating performance, densification dewatering and the SS rate of recovery.And also requirement improves the transporting property of the low filter cake of moisture content.
Therefore, in the 4th embodiment, in the raising of seeking filtering and concentrating performance, densification dewatering and the SS rate of recovery, also wish to improve transporting property.
Filter medium as outside filter medium 1,2 in being used for as illustrated in the first embodiment, is not limited to the wedge type silk screen, also can use perforated board (not shown), wire netting (not shown), filter cloth (not shown) etc.This wherein, as perforated board, the solids dehydration that for example can adopt crack frame, rhombus sieve, metallic grid, circular hole, herringbone square hole etc. with, separate with, concentrate with and the perforated board used etc. of classification.
Though it is not shown, but when using perforated board to be used as the filter medium of inboard filter medium 1 and/or outside filter medium 2, low and have a bottom of the many filter spaces 4 of mobile processed liquid at solid component concentration, employing is mainly used in the big perforated board in aperture (opening) that carries out filtering and concentrating, and on the top of the many filter spaces 4 of the low and filter cake of moisture content, employing is mainly used in the little perforated board in aperture that carries out the densification dehydration, thereby also can become on the whole along with from the bottom of filter space 4 to top, the structure that the aperture diminishes gradually.That is,, then can discharge oral-lateral and produce high pressure, so filter cake is difficult to flow out from filter medium, thereby produced the effect of the raising SS rate of recovery (%) at filter cake if reduce the aperture on the top of filter space 4.
As its variation, be that the hole that all has same apertures is formed to top at the bottom from filter space 4, but also can be along with from the bottom of filter space 4 to top, the diminishing structure of percent opening.
In addition, said structure is not restricted to perforated board, also can adopt same structure for the opening of wedge type silk screen etc.
In addition, though not shown, can use the filter medium of having implemented high friction treatment to be used as inboard filter medium 1 and/or outside filter medium 2.Filter cake and processed liquid are by being transported by the circumferencial direction along interior outside filter medium 1,2 with the friction of the filter medium that rotates, and owing to interfering with partition wall 3 and can being that the center rotation is mobile in the axial direction on one side on one side with the axle, and finally discharge from filter cake outlet 14, therefore, can improve transporting property by filter medium being implemented high friction treatment.In addition, so-called high friction treatment is meant, uses the high material of frictional resistance (coefficient of friction), carried out that concavo-convex etc. surface-treated improves the processing of frictional resistance or the parts of having implemented such processing are installed on the surface.As this high friction treatment, for example can consider to have formed concavo-convex perforated board on the surface of rhombus sieve or crack frame etc.Concavo-convex by the surface, it is big that the contact area of filter cake and processed liquid and perforated board becomes, and frictional resistance is big, therefore can improve and transport performance.
Particularly, by using the filter medium of having implemented high friction treatment at least, can improve the frictional force with filter medium, thereby be easy to transport filter cake in the top part of the many filter spaces 4 of the low and filter cake of moisture content.In addition, low at solid component concentration and also use bottom that have many filter spaces 4 of mobile processed liquid, can improve stirring efficiency.
As Figure 16 and shown in Figure 17, also can take into account on the side filter medium 1 install be used for auxiliary filter cake and processed liquid transport transport accessory 24.This transports the flat board that accessory 24 is ring-types, and it rotates along with the rotation of inboard filter medium 1, assists they transport of promotion by making filter cake and processed liquid contact the frictional force that produces with the surface.Because partition wall 3 is non-rotary structures, so need be being pre-formed the 3C of grooving portion, so that both do not interfere with transporting the part that accessory 24 intersects.In addition, in order to strengthen frictional force, preferably high friction treatment is carried out on the surface of transporting accessory 24.In addition, transport slave part 24 and also many places can be set, and, though not shown, also can be installed on the filter medium 2 of the outside, can also be installed in the example that staggers in position on the short transverse on inboard filter medium 1 and outside filter medium 2 both sides.In the present embodiment, transporting accessory 24 is along the flat board of the side face ring-shaped continuous of filter medium, is not limited to this, though not shown, also can be discontinuous rod-like members.This rod-like members also can be provided with many places.
As Figure 18 and shown in Figure 19, it is also conceivable that on outside filter medium 2 the shaft-like accessory 25 that transports that can stretch in the axial direction is installed, so that assist transporting of filter cake and processed liquid, and avoid and the intersecting of partition wall 3.This transports accessory 25 and is installed in the periphery of outside filter medium 2 via the compression spring, and rearward end is pushed by the periphery of endless member 26.Endless member 26 is provided with in the mode of surrounding outside filter medium 2, and transports accessory 25 stretching on the radial direction of outside filter medium 2 by limiting with the rearward end butt that transports accessory 25.It is scalable in the axial direction to transport accessory 25, is for fear of contacting with partition wall 3, and as shown in figure 19, the part intersecting with partition wall 3 is formed with recess 26A on the periphery of endless member 26, do not contact with partition wall 3 so that transport accessory 2.
In addition, transport accessory 25 and also many places can be set, and, though not shown, also can be arranged on the inboard filter medium 1 but transport accessory 25, be used to limit the inboard that the endless member 26 that transports accessory 25 also can be arranged on inboard filter medium 1.
Above-mentioned Figure 16 and mode shown in Figure 17 and Figure 18 and mode shown in Figure 19 are applied to particularly the low and top part of the filter space 4 that filter cake is many of moisture content at least, can improve the transporting property of filter cake thus.
About other structures, since identical with first to the 3rd embodiment, so omit its detailed description.In addition, because the filter method of the filter of use the 4th embodiment is also identical with first to the 3rd embodiment, the Therefore, omited describes in detail.
＜the five embodiment 〉
In the first embodiment, also have room for improvement, therefore, in the 5th embodiment, wish when the densification filter cake is with the promotion dehydration, to realize adjustment its percent consolidation for carry out the densification of filter cake and the reduction of moisture content at the filter cake outlet.
In the 5th embodiment, as Figure 20 to Figure 22, the filter cake outlet 14 among the upper plate 7A of housing 7 is in the roughly gamut that is formed on 4 projection section of filter space circularly.And, be provided with this filter cake outlet 14 of a plurality of coverings back pressure plate 15,15 ...These back pressure plates 15,15 ... can freely install and remove with respect to filter cake outlet 14, for example, be fixed on the upper plate 7A of housing 7 by bolt etc.In addition, filter cake outlet 14 also can be formed in the gamut of 4 projection section of filter space and only is formed on the part.
As shown in figure 23, filter cake moves to the top of filter space 4 along the partition wall 3 of helical form (spiral shape), but because a plurality of back pressure plates 15,15 ... be positioned at topmost, so move up, just reduction more of the area of section of the mobile space of filter cake (the longitudinal section area of the part that is surrounded by partition wall 3 and back pressure plate 15 and inboard filter medium 1 and outside filter medium 2).Therefore, as shown in figure 22, by suitably install and remove back pressure plate 15,15 ... this area of section is changed, regulate extruding force (discharge resistance) and the discharge rate that imposes on filter cake thereby can wait according to the composition of filter cake and operational situation.
And, because inboard filter medium 1 and outside filter medium 2 are rotated in the filter space 4, so filter cake on one side is squeezed power and dewaters at radial direction on one side along partition wall 3 rotations of helical form (spiral shape), in addition, near the filter cake outlet 14 filter cakes also be subjected to back pressure plate 15,15 ... extruding in the axial direction, therefore, topmost at filter space 4, can be squeezed with axial these two different directions from radial direction, thereby can realize the low-water-content of filter cake effectively.
The filter cake of discharging from filter cake outlet 14 on one side since the inertia force that rotation produced (extrusions) of inboard filter medium 1 and outside filter medium 2 rotate, one side from the end discharge of the upper plate 7A of housing 7.Be sent to dewatered cake then and transport equipment (not shown), to carry out next treatment process.
In addition, other embodiments such as Figure 26 are to shown in Figure 28, and back pressure plate 15 also can be divided into standing part and moving part.In Figure 26, fixedly back pressure plate 15A and movable back pressure plate 15B are circle shape cross-over configuration.Movable back pressure plate 15B is installed in from the arm 37 of rotating hub 36 extensions.This movable back pressure plate 15B can fixedly slide on the back pressure plate 15A along circumferencial direction, therefore, can adjust the size of filter cake outlet 14 by the rotation of hub 36.Therefore, can carry out further inching to the extruding force (discharge resistance) and the discharge rate that impose on filter cake according to operational situation etc.And, in this mode, can be from a plurality of local filter cakes of discharging.
In addition, fixedly back pressure plate 15A must be set not necessarily, in this case, as long as the upper plate 7A of housing 7 is extended.
Like this, by being constituted, the back pressure plate can adjust the area of section of filter cake at the mobile space of the discharge portion office of filter cake outlet, just can wait and adjust extruding force (discharge resistance) and the discharge rate that imposes on filter cake according to the composition of filter cake and operational situation, except above-mentioned embodiment, also can as long as can adjust the area of section of discharge section.
Here, can consider other various methods as the method that will be transported to the outside of housing 7 from the filter cake that filter cake outlet 14 is discharged.For example,, also can on housing 7, form inclined plane 7C down, from here filter cake is discharged to the outside as Figure 24 and Figure 25 and Figure 29 and shown in Figure 30.In addition, though not shown, make upper plate 7A have the gradient that has a down dip along radial direction court by axle center to circumferential section from housing 7, just can further reliably filter cake be discharged to the outside.
In addition, also can be directly connected to dewatered cake from filter cake outlet 14 and transport equipment by the stream (not shown) of closed pipeline shape.At this moment, because can be airtight fully, so can suppress foul smell and simplify airtight construction.
And, by screw transmission strap (not shown) being installed at filter cake outlet 14, can also be by screw transmission strap with the mandatory discharge of filter cake.At this moment, owing to can discharge fully,, can also alleviate the problems such as corrosion that cause by residual filter cake so have good spatter property.
In addition, can also be near filter cake outlet 14 setting scrape and get blade (not shown), filter cake is discharged to the upper plate 7A end of housing by its propulsive force.About the driving of blade, can also can adopt other drive source with making first rotating driving device of inboard filter medium 1 and outside filter medium 2 rotations or second rotating driving device as drive source.
In addition,, install under the situation of whole landscape configuration, also can suitably select the above-mentioned device that transports to housing 7 outsides in the axle center landscape configuration of device self.
For other structures, because identical with first to fourth embodiment, the Therefore, omited describes in detail.
In addition, filter method for the filter that has adopted the 5th embodiment, the filter cake of discharging from filter cake outlet 14 is on one side owing to the inertia force that rotation produced (extrusion) of inboard filter medium 1 and outside filter medium 2 rotates, discharge from the end of the upper plate 7A of housing 7 on one side, or adopt the various devices that transport to the outside of housing 7 (for example, be formed on the housing 7 towards the inclined plane of below 7C) that filter cake is finally discharged from filter.Other because identical with first to fourth embodiment, the Therefore, omited describes in detail.
Claims (10)
1. a filter is characterized in that, this filter has:
Cylindric or the cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; With
Be arranged on the spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium,
Described filter constitutes, and distolateral processed liquid is sent into from one of described filter space, and another in the filter space is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium,
Described inboard filter medium and/or described outside filter medium rotate around the axle center, and described spiral helicine partition wall does not rotate.
2. a filter is characterized in that, this filter has:
Cylindric or the cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; With
Be arranged on the spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium,
Described filter constitutes, and distolateral processed liquid is sent into from one of described filter space, and another in the filter space is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium,
Described inboard filter medium and/or described outside filter medium rotate around the axle center, and described spiral helicine partition wall does not rotate,
Described partition wall is supported by a support unit distolateral and/or that another is distolateral that is fixed on described filter space.
3. filter as claimed in claim 2 is characterized in that,
Described support unit is configured to scrape the structure that is taken at the filter cake that adheres on the filter medium near to or in contact with in described inboard filter medium and/or described outside filter medium to become.
4. a filter is characterized in that, this filter has:
Cylindric or the cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; With
Be arranged on the spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium,
Described filter constitutes, and distolateral processed liquid is sent into from one of described filter space, and another in the filter space is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium,
Described inboard filter medium and/or described outside filter medium rotate around the axle center, and described spiral helicine partition wall does not rotate,
One distolateral distolateral along with from described filter space to another, the size decreases of the perforate of the filtering surface in described inboard filter medium and/or the described outside filter medium.
5. filter, this filter has:
Cylindric or the cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; With
Be arranged on the spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium,
Described filter constitutes, distolateral processed liquid is sent into from one of described filter space, another in the filter space is distolateral discharges filter cake, and will be discharged to the outside by the filtered fluid in described inboard filter medium and the described outside filter medium, it is characterized in that
Described inboard filter medium and/or described outside filter medium rotate around the axle center, and described spiral helicine partition wall does not rotate,
The filter cake outlet of another the distolateral formation in described filter space is provided with the back pressure plate that is used to push filter cake.
6. filter as claimed in claim 5 is characterized in that,
Described back pressure plate constitutes, and can regulate the area of section of the discharge section of described filter cake outlet.
7. as each described filter in the claim 1 to 6, it is characterized in that,
The inner periphery of sending into oral-lateral and the neighboring of the processed at least liquid of described spiral helicine partition wall are respectively near to or in contact with described inboard filter medium and described outside filter medium.
8. as each described filter in the claim 1 to 6, it is characterized in that,
Described inboard filter medium and described outside filter medium, the mode that can have speed difference with the rotary speed of the rotary speed of described inboard filter medium and described outside filter medium is rotated.
9. as each described filter in the claim 1 to 6, it is characterized in that,
Described spiral helicine partition wall is constituted as, and along with distolateral another is distolateral to described from described one, helix pitch shortens.
10. a filter method is characterized in that, described filter method uses filter, and described filter has: the cylindric or cone shape inboard filter medium and the outside filter medium that are concentric shape configuration; And be arranged on spiral helicine partition wall in the filter space between described inboard filter medium and the described outside filter medium,
Described spiral helicine partition wall does not rotate, and only described inboard filter medium and/or described outside filter medium rotate around the axle center,
In this operating process, processed liquid is from distolateral sending in the described filter space of described filter space, and filters by described inboard filter medium and described outside filter medium, and each filtered fluid is discharged to the outside, and,
Another distolateral discharge filter cake in the described filter space.
Applications Claiming Priority (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005176901A JP4518495B2 (en) | 2005-06-16 | 2005-06-16 | Filtration apparatus and filtration method |
| JP176901/2005 | 2005-06-16 | ||
| JP297390/2005 | 2005-10-12 | ||
| JP2005297391A JP4493030B2 (en) | 2005-10-12 | 2005-10-12 | Filtration device |
| JP2005297394A JP4493032B2 (en) | 2005-10-12 | 2005-10-12 | Filtration device |
| JP297391/2005 | 2005-10-12 | ||
| JP297394/2005 | 2005-10-12 | ||
| JP2005297390A JP4518500B2 (en) | 2005-10-12 | 2005-10-12 | Filtration device |
| JP2006001792A JP4493038B2 (en) | 2006-01-06 | 2006-01-06 | Filtration device |
| JP001792/2006 | 2006-01-06 | ||
| PCT/JP2006/311062 WO2006134784A1 (en) | 2005-06-16 | 2006-06-02 | Filtering apparatus and filtering method |
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| Publication Number | Publication Date |
|---|---|
| CN101198392A CN101198392A (en) | 2008-06-11 |
| CN101198392B true CN101198392B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006800212386A Active CN101198392B (en) | 2005-06-16 | 2006-06-02 | Filtration apparatus and filtration method |
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| Country | Link |
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| JP (1) | JP4518495B2 (en) |
| CN (1) | CN101198392B (en) |
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| JP2004130274A (en) * | 2002-10-15 | 2004-04-30 | Ishigaki Co Ltd | Screw-extruding dewatering-equipment and its operation method |
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2005
- 2005-06-16 JP JP2005176901A patent/JP4518495B2/en active Active
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2006
- 2006-06-02 CN CN2006800212386A patent/CN101198392B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2501172Y2 (en) * | 1991-03-14 | 1996-06-12 | 石垣機工株式会社 | Concentrator cake feed screw device |
| JP2735997B2 (en) * | 1993-07-13 | 1998-04-02 | 有限会社アートレス | Separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006346600A (en) | 2006-12-28 |
| CN101198392A (en) | 2008-06-11 |
| JP4518495B2 (en) | 2010-08-04 |
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