CN104275005A - Filter pressing method adopting filter press adopting dynamic filtration - Google Patents
Filter pressing method adopting filter press adopting dynamic filtration Download PDFInfo
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- CN104275005A CN104275005A CN201410447102.8A CN201410447102A CN104275005A CN 104275005 A CN104275005 A CN 104275005A CN 201410447102 A CN201410447102 A CN 201410447102A CN 104275005 A CN104275005 A CN 104275005A
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Abstract
The invention discloses a filter pressing method adopting a filter press adopting dynamic filtration. The method comprises the following two steps: dynamic filtration and filtration with a filter cake layer, wherein in the step of dynamic filtration, filtrate is pumped into a filter chamber by a feed pump, and increase of the thickness of the filter cake layer is inhibited by utilizing an eddy generated by an eddy generating structure among a feed channel, a filter tank and a water outlet channel, so that a generated thinner filter cake moves and carries out filtration until the filter chamber is filled with the filter cake under the action of a feed pressure; in the step of filtration with the filter cake layer, a pressure is directly transmitted to the filter cake by filter plates to squeeze filter residues, so that the bridging strength of the filter residues creeps under the action of a critical hydraulic pressure greater than the bridging strength so as to squeeze out water through compression. The method has the beneficial effects that the original principle of utilizing the filter cake layer for filtration is changed, thus overcoming the defects of high water content of the filter cake, difficulty in removing the cake and high losses of filter cloths.
Description
Technical field
The present invention relates to dynamic filtration filter press filter-pressing method.
Background technology
The filter-press dehydration of SMTO catalyst is a very important link during it is produced, and in whole production process, has very important effect.Existing filter-pressing process mainly contains following link: utilize cake layer work principle of filter, fed filtration, when inlet amount reaches the upper limit, time fluid is few, starts diaphragm pressing and carries out press dewatering, after press dewatering completes, carry out removal filter cake, finally dry.
Original work principle of filter and way, adopt cake layer to filter, the filter cake after filtration is thicker, and resistivity is larger, and filter more difficult, make cake moisture high, filtration time is long.Namely material is after filtration completes, still containing a large amount of moisture.So not only make the increasing of follow-up oven dry cost; And filter cake becomes mud shape to stick on filter cloth, and need workman to root out, cause cake discharge difficulty, labo r usage's increasing; Cake moisture is high, and the concentration of toxic gases contained by the inside is just high, larger to the harm of operator; Utilize hard tool to be rooted out by the filter cake sticked on filter cloth, the loss of filter cloth strengthens, and the replacement cycle is short.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of dynamic filtration filter press filter-pressing method, solves the defect that cake moisture is high, cake discharge is difficult, filter cloth loss is large.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of dynamic filtration filter press filter-pressing method, dynamic filtration filter press comprises at least one press filtration unit, each press filtration unit comprises two pieces of filter plates, elasticity squeeze frame is provided with between described two pieces of filter plates, formed between described elasticity squeeze frame and filter plate and seal, filter chamber is formed between described two pieces of filter plates, described elasticity squeeze frame is located at the surrounding edge of filter plate, described filter plate comprises filter plate body, described filter plate body front and back is coated by filter cloth, the described filter plate body back side is filtering surface, described filter plate body front surrounding is provided with frame, the positive Middle face of described filter plate body encloses out filter pocket by frame, on the downside of described filter plate body, two corner locations are respectively equipped with charging aperture and delivery port, described filter plate body front is provided with the feeding-passage that is communicated with charging aperture and filter pocket, described filter plate body front is also provided with the exhalant canal that is communicated with delivery port and filter pocket, described feeding-passage, filter pocket, vortex generating structure is provided with between exhalant canal,
The course of work of this dynamic filtration filter press comprises dynamic filtration and cake layer filters two steps:
Dynamic filtration: pump into filtrate by feed pump in filter chamber, the vortex generating structure between feeding-passage, filter pocket, exhalant canal is utilized to produce eddy current, filtrate produces shearing force enter filter chamber by feeding-passage under eddy current effect after, cake layer is suppressed to thicken, the thinner filter cake of generation is made to obtain moving and filter, the product water filtered flows out from delivery port, until filter chamber is full of filter cake under feed pressure effect;
Cake layer filters: impose super high pressure hydraulic power to press filtration unit, make two pieces of filter plates make cylinder piston secondary to advance, be directly passed to filter cake by filter plate and implement squeezing to filter residue, the bridge formation intensity of filter residue is produced under the critical action of hydraulic force being greater than it, and scholar becomes, compresses, moisture of squeezing out.
Preferably, described feeding-passage comprises and the straightway of the longitudinal central axis line parallel of filter pocket and the arc section to curved extension on the upside of filter pocket longitudinal central axis line.
Preferably, described exhalant canal is and that to filter pocket longitudinal central axis line on the downside of an extend beeline channel vertical with filter pocket longitudinal central axis line.
Preferably, the posterior segment of described feeding-passage and exhalant canal is all arranged along the edge of filter pocket.
Preferably, the longitudinal cross-section of described filter pocket be upper base upper go to the bottom under ladder structure of right angle.
The present invention is at feeding-passage, filter pocket, vortex generating structure is provided with between exhalant canal, the filtrate suspended in the dynamic filtration process of charging forms spiral vortex after feeding-passage enters filter pocket, spiral vortex constantly stirs the filtrate entering filter chamber, on the one hand filter cloth is washed away, prevent the initial stage of filter residue on filter medium from depositing in a large number, on the other hand, make filtrate by center to surrounding alluviation to limit thickening of filter cake, also filtering simultaneously, like this, mobile filtrate on one side, while filter, in the process of this dynamic filtration, the rate of filtration can not obviously slow down, complete after filter chamber is full of filter cake under feed pressure effect, finally super high pressure hydraulic power is imposed to it, make two pieces of filter plates make cylinder piston secondary to advance, the squeezing of filter cake enforcement to filter residue is directly passed to by filter plate, make the bridge formation intensity of filter residue under the critical action of hydraulic force being greater than it, produce scholar to become, compression, to squeeze out moisture, change and originally utilize cake layer work principle of filter, thus it is high to solve cake moisture, cake discharge is difficult, the defect that filter cloth loss is large.
Therefore beneficial effect of the present invention is embodied in:
1, cake moisture is low, and the rate of filtration is fast, reduces oven dry cost;
2, filter cake becomes pie, and moisture few filter cake intensity is large, and water content is little, and substantially reduce the adhesion of filter cake to filter medium, filter plate one is opened, and utilizes the mechanism of mechanical cake discharge, is just easy to fall down, and without the need to manually rooting out, employment reduces;
3, by reducing the toxic gas produced, the harm to operating personnel is reduced;
4, without the need to rooting out filter cake with hard tool, filter cloth damage is little, and the replacement cycle is long.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the Facad structure schematic diagram of filter plate;
Fig. 2 is A-A generalized section in Fig. 1.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of dynamic filtration filter press, comprise at least one press filtration unit, each press filtration unit comprises two pieces of filter plates 1, elasticity squeeze frame is provided with between described two pieces of filter plates, formed between described elasticity squeeze frame and filter plate and seal, filter chamber is formed between described two pieces of filter plates, described elasticity squeeze frame is located at the edge part of filter plate, described filter plate comprises filter plate body, described filter plate body front and the back side coated by filter cloth, the described filter plate body back side is filtering surface 17, described filtering surface is provided with convex stripe, described filter plate body front surrounding is provided with frame 11, the positive Middle face of described filter plate body encloses out filter pocket 12 by frame, on the downside of described filter plate body, two corner locations are respectively equipped with charging aperture 13 and delivery port 15, described filter plate body front is provided with the feeding-passage 14 that is communicated with charging aperture and filter pocket, described filter plate body front is also provided with the exhalant canal 16 that is communicated with delivery port and filter pocket, described feeding-passage, filter pocket, vortex generating structure is provided with between exhalant canal.
Concrete, described feeding-passage comprises and the straightway of the longitudinal central axis line parallel of filter pocket and the arc section to curved extension on the upside of filter pocket longitudinal central axis line.Described exhalant canal is and that to filter pocket longitudinal central axis line on the downside of an extend beeline channel vertical with filter pocket longitudinal central axis line.Like this, filtrate forms roughly spiral structure through feeding-passage, filter pocket, exhalant canal, and due to the jet impact force of charging, filtrate can form strong eddy current in filter chamber.Spiral vortex constantly stirs the filtrate entering filter chamber, on the one hand filter cloth is washed away, prevent the initial stage of filter residue on filter medium from depositing in a large number, on the other hand, make filtrate by center to surrounding alluviation to limit thickening of filter cake, meanwhile, also filtering, like this, mobile filtrate on one side, while filter, in the process of this dynamic filtration, the rate of filtration can not obviously slow down.
In addition, filter pocket is roughly rounded, the straightway of feeding-passage and exhalant canal and filter pocket tangent, the posterior segment of described feeding-passage and exhalant canal is all arranged along the edge of filter pocket.The end being exactly described feeding-passage in addition extends through filter pocket longitudinal central axis line, the end of described exhalant canal also extends through filter pocket longitudinal central axis line, and both to exceed the distance of filter pocket longitudinal central axis line roughly equal, test shows, the intensity and the effect that form eddy current like this can be better.
The longitudinal cross-section of described filter pocket be upper base upper go to the bottom under ladder structure of right angle, the filter pocket of so last formation and filter chamber are the little structure of the large lower space of upper space, and such venturi effect is better, and filter effect is better.
The course of work of this dynamic filtration filter press comprises dynamic filtration and cake layer filters two steps:
Dynamic filtration: pump into filtrate by feed pump in filter chamber, the vortex generating structure between feeding-passage, filter pocket, exhalant canal is utilized to produce eddy current, filtrate produces shearing force enter filter chamber by feeding-passage under eddy current effect after, cake layer is suppressed to thicken, the thinner filter cake of generation is made to obtain moving and filter, the product water filtered flows out from delivery port, until filter chamber is full of filter cake under feed pressure effect;
Cake layer filters: impose super high pressure hydraulic power to press filtration unit, make two pieces of filter plates make cylinder piston secondary to advance, be directly passed to filter cake by filter plate and implement squeezing to filter residue, the bridge formation intensity of filter residue is produced under the critical action of hydraulic force being greater than it, and scholar becomes, compresses, moisture of squeezing out.
Claims (5)
1. a dynamic filtration filter press filter-pressing method, dynamic filtration filter press comprises at least one press filtration unit, each press filtration unit comprises two pieces of filter plates, it is characterized in that: between described two pieces of filter plates, be provided with elasticity squeeze frame, formed between described elasticity squeeze frame and filter plate and seal, filter chamber is formed between described two pieces of filter plates, described elasticity squeeze frame is located at the surrounding edge of filter plate, described filter plate comprises filter plate body, described filter plate body front and back is coated by filter cloth, the described filter plate body back side is filtering surface (17), described filter plate body front surrounding is provided with frame (11), the positive Middle face of described filter plate body encloses out filter pocket (12) by frame (11), on the downside of described filter plate body, two corner locations are respectively equipped with charging aperture (13) and delivery port (15), described filter plate body front is provided with the feeding-passage (14) that is communicated with charging aperture and filter pocket, described filter plate body front is also provided with the exhalant canal (16) that is communicated with delivery port and filter pocket, described feeding-passage, filter pocket, vortex generating structure is provided with between exhalant canal,
The course of work of this dynamic filtration filter press comprises dynamic filtration and cake layer filters two steps:
Dynamic filtration: pump into filtrate by feed pump in filter chamber, the vortex generating structure between feeding-passage, filter pocket, exhalant canal is utilized to produce eddy current, filtrate produces shearing force enter filter chamber by feeding-passage under eddy current effect after, cake layer is suppressed to thicken, the thinner filter cake of generation is made to obtain moving and filter, the product water filtered flows out from delivery port, until filter chamber is full of filter cake under feed pressure effect;
Cake layer filters: impose super high pressure hydraulic power to press filtration unit, make two pieces of filter plates make cylinder piston secondary to advance, be directly passed to filter cake by filter plate and implement squeezing to filter residue, the bridge formation intensity of filter residue is produced under the critical action of hydraulic force being greater than it, and scholar becomes, compresses, moisture of squeezing out.
2. a kind of dynamic filtration filter press filter-pressing method according to claim 1, is characterized in that: described feeding-passage comprises and the straightway of the longitudinal central axis line parallel of filter pocket and the arc section to curved extension on the upside of filter pocket longitudinal central axis line.
3. a kind of dynamic filtration filter press filter-pressing method according to claim 2, is characterized in that: described exhalant canal is and that to filter pocket longitudinal central axis line on the downside of an extend beeline channel vertical with filter pocket longitudinal central axis line.
4. a kind of dynamic filtration filter press filter-pressing method according to claim 3, is characterized in that: the posterior segment of described feeding-passage and exhalant canal is all arranged along the edge of filter pocket.
5. a kind of dynamic filtration filter press filter-pressing method according to Claims 1-4 any one, is characterized in that: the longitudinal cross-section of described filter pocket be upper base upper go to the bottom under ladder structure of right angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447102.8A CN104275005A (en) | 2014-09-04 | 2014-09-04 | Filter pressing method adopting filter press adopting dynamic filtration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410447102.8A CN104275005A (en) | 2014-09-04 | 2014-09-04 | Filter pressing method adopting filter press adopting dynamic filtration |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54129571A (en) * | 1978-03-31 | 1979-10-08 | Sanki Eng Co Ltd | Filter press attached with vacuum process |
| JPS5678610A (en) * | 1979-11-30 | 1981-06-27 | Tetsuya Kurita | Pressing type filter press apparatus |
| US4643827A (en) * | 1984-07-07 | 1987-02-17 | Seitz Enzinger Noll Maschinenbau Aktiengesellschaft | Filter press for cake filtration |
| JPH0615112A (en) * | 1992-07-03 | 1994-01-25 | Nit Co Ltd | Continuous filter press dehydrator and dehydrating method |
| CN1132654A (en) * | 1994-12-22 | 1996-10-09 | 埃伯哈德·霍希和索内公司 | Filter press |
| CN102974140A (en) * | 2012-11-16 | 2013-03-20 | 浙江金鸟压滤机有限公司 | Press filter |
-
2014
- 2014-09-04 CN CN201410447102.8A patent/CN104275005A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54129571A (en) * | 1978-03-31 | 1979-10-08 | Sanki Eng Co Ltd | Filter press attached with vacuum process |
| JPS5678610A (en) * | 1979-11-30 | 1981-06-27 | Tetsuya Kurita | Pressing type filter press apparatus |
| US4643827A (en) * | 1984-07-07 | 1987-02-17 | Seitz Enzinger Noll Maschinenbau Aktiengesellschaft | Filter press for cake filtration |
| JPH0615112A (en) * | 1992-07-03 | 1994-01-25 | Nit Co Ltd | Continuous filter press dehydrator and dehydrating method |
| CN1132654A (en) * | 1994-12-22 | 1996-10-09 | 埃伯哈德·霍希和索内公司 | Filter press |
| CN102974140A (en) * | 2012-11-16 | 2013-03-20 | 浙江金鸟压滤机有限公司 | Press filter |
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