A kind of filter press pressing method
Technical field
The present invention relates to filter press.
Background technology
Filter press is a kind of intermittent solid-liquid separating equipment, carries out Separation of Solid and Liquid operation.Existing filter press (sheet frame, van-type, diaphragm pressing) is cake layer work principle of filter (and flowing through filter).It arranges charging aperture conventionally on filter plate, passes through valve closing charging aperture in pressure-filtering process.Filter opening in pressure-filtering process on filter plate easily stops up, and charging aperture shutoff operation is loaded down with trivial details.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of filter press pressing method, and charging aperture can be closed automatically, and the filter opening on filter plate is not easy to stop up.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of filter press pressing method, it is characterized in that: filter press is made up of the squeeze frame of several stacked settings, described squeeze frame comprises two parallel filter plates, between two filter plates, be provided with elastomer frame, sealing laminating between described elastomer frame and filter plate, elastomer frame and two filter plates surround filter chamber, described elastomer frame is provided with the charging aperture being communicated with filter chamber, described charging aperture is strip, charging aperture is long is 40mm, wide is 20mm, two ends are the circular arc of R10mm, filter press filter-pressing method comprises the steps:
The material that first, need filter enters filter chamber by the charging aperture of elastomer frame and filters;
Secondly, filter plate compresses elastomeric frame filters, and has certain pressure compressed 5 millimeters of this filtration stage elastomer frame with the contact-making surface that ensures elastomer frame and filter plate, ensures that filtered fluid can not leak;
Then, squeeze, filter finish after because filter cake now also has a large amount of liquid, so must squeeze, the liquid of the surplus of squeezing out, in the time that two filter plates are pressed to 20 millimeters, charging aperture is completely closed; Finally, continue squeezing, stop until the liquid phase in filter chamber flows out.
As preferably, described elastomer frame outer rim is provided with a circle flange, between described flange and two filter plates, is provided with gap.
As preferably, described elastomer frame is provided with iron circle around flange and wales elastomer frame.
As preferably, between described flange root and described elastomer frame, be provided with chamfered transition structure.
As preferably, described filter press is plate and frame filter press or chamber-type press filter.
The present invention surrounds filter chamber by elastomer frame and filter plate, establishes charging aperture in resilient bezel, and in pressure-filtering process, material, first through press filtration, then squeezes again like this, makes charging aperture pressurized and sealing completely, greatly improves filter cake humidity, ensures again the unimpeded of charging next time.In filtration, ensure not revealing of filtrate.In the filtration of rear further squeezing, mud humidity greatly improves again, simple in structure, has ensured the unimpeded of charging, and charging aperture can automatically close in pressure-filtering process, and the filter opening on filter plate is also not easy to stop up.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the structural representation of squeeze frame discharging opening position;
Fig. 2 is the structural representation of the non-discharging opening of squeeze frame position.
Detailed description of the invention
Explanation filter press of the present invention sees figures.1.and.2, this filter press forms by several squeeze frames are stacked, described squeeze frame comprises two parallel filter plates 1, between two filter plates 1, be provided with elastomer frame 2, sealing laminating between described elastomer frame 2 and filter plate 1, elastomer frame 2 and two filter plates 1 surround filter chamber 4, and described elastomer frame 2 is provided with the charging aperture 5 being communicated with filter chamber 4.
Described charging aperture 5 is strip, and charging aperture is wide is 20mm, and long is 40mm, the circular arc that two ends are R10mm.Described elastomer frame 2 outer rims are provided with a circle flange 6, between described flange 6 and two filter plates 1, are provided with gap 8.Certain space has been reserved to filter plate 1 compresses elastomeric frame 2 in this gap.
Described elastomer frame 2 is provided with iron circle 3 around flange 6 and wales elastomer frame 2.At non-charging aperture position, described iron circle 3 medial extremitys are provided with draw-in groove, and described flange 6 is connected to location in draw-in groove.At charging aperture position, described flange 6 left and right sides are provided with groove, and described iron circle 3 hoops are located in described groove.Between described flange 6 roots and described elastomer frame 2, be provided with chamfered transition structure 7.Described filter press is plate and frame filter press or chamber-type press filter.
The pressing method of above-mentioned filter press comprises the steps:
The material that first, need filter enters filter chamber by the charging aperture of elastomer frame and filters;
Secondly, filter plate compresses elastomeric frame filters, and has certain pressure compressed 5 millimeters of this filtration stage elastomer frame with the contact-making surface that ensures elastomer frame and filter plate, ensures that filtered fluid can not leak;
Then, squeeze, filter finish after because filter cake now also has a large amount of liquid, so must squeeze, the liquid of the surplus of squeezing out, in the time that two filter plates are pressed to 20 millimeters, charging aperture is completely closed;
Finally, continue squeezing, stop until the liquid phase in filter chamber flows out.