CN1846832A - Filtering dewatering method for pressure filter - Google Patents
Filtering dewatering method for pressure filter Download PDFInfo
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- CN1846832A CN1846832A CN 200510064301 CN200510064301A CN1846832A CN 1846832 A CN1846832 A CN 1846832A CN 200510064301 CN200510064301 CN 200510064301 CN 200510064301 A CN200510064301 A CN 200510064301A CN 1846832 A CN1846832 A CN 1846832A
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- filter
- press filtration
- dewatering method
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Abstract
The present invention relates to solid-liquid separating technology, and is especially filtering and dewatering method in pressure filter. The present invention has improved material feeding and filtering method to lower the water content in filter cake, simplified and durable filtering plate structure, low pressure filter cost and less maintenance.
Description
Technical field
The present invention relates to the solid-liquid separation technique field, be specifically related to the filtering dewatering method of filter press.
Background technology
Well-known a kind of filter press has the switching hold-down mechanism, is arranged in the filter plate that the majority that opens and closes between the hold-down mechanism is equipped with filter cloth and squeeze diaphragm.These filter plates can be drawn close mutually and compress to form airtight filter chamber, filtrate chamber and crushing chamber under the effect of switching hold-down mechanism.Suspension inlet from filter chamber under pressure promotes enters filter chamber.The liquid that promotes in the low suspension liquid at pressure sees through the outlet outflow filter plate of filter cloth from the filtrate chamber, and the solid phase of being held back by filter cloth accumulates in filter cloth surface formation filter cake gradually.When solid phase is focused to suitable thickness, stop to be pressed into suspension.To crushing chamber feeding press water or compressed air promotion squeeze diaphragm filter cake is pushed subsequently, squeeze out liquid wherein.Send Compressed Gas to from the inlet of filter chamber then and dry up filter cake.At last, start and open and close hold-down mechanism and draw back filter plate row and unload filter cake.The above-mentioned course of work is: close and compress filter plate → feed press filtration → diaphragm pressing filter cake → air blow drying filter cake → draw back filter plate row and unload filter cake.Usually filter cake thickness is below 30～50mm.Can obtain the low filter cake of moisture content with diaphragm pressing, but it is directed at the equipment cost raising.Especially barrier film is not long service life, and not only spare part is costly to change barrier film, and time-consumingly influences production, is directed at the high of production cost.
Summary of the invention
The objective of the invention is to avoid above-mentioned shortcoming, provide a kind of economy, effective filtering dewatering method, to obtain the lower filter cake of moisture content.
Filtering dewatering method of the present invention is to improve the effect that Compressed Gas dries up filter cake with the feed press filtration that improves, and reaches the purpose that reduces filter cake moisture content.Its course of work is: close the feed press filtration → Compressed Gas that compresses filter plate → improvement and dry up filter cake → draw back filter plate and get rid of filter cake.
The feed press filtration of improvement of the present invention can be the density that improves filter cake with the mode that at least once repeats the feed press filtration, and repeat to send into Compressed Gas to filter chamber before the feed at every turn, carrying out blink (for example 10～60 seconds) dries up filter cake, that is: the feed press filtration of improvement=(feed press filtration+blink Compressed Gas dry up filter cake+feed press filtration+...).
The feed press filtration of improvement of the present invention also can be to carry out the feed press filtration to improve the density of filter cake with pulse mode.
The feed press filtration of improvement of the present invention also can be the thickness (the final filter cake thickness when said herein filter cake thickness is meant and finishes the feed press filtration) that improves filter cakes with measures such as improving feeding pressure, prolongation feed time, suitable filter cake thickness needs to determine according to the character that is filtered material, normally by test determination.According to the present invention, the degree of depth of filter chamber should be selected according to result of the test, is not subjected to the restriction of prior art, and selected scope can enlarge 60～200mm.
The feed press filtration of improvement of the present invention can also be that above-mentioned multiple measure is used in combination to improve effect.
According to filter press filter board of the present invention, it comprises filter chamber and filtrate chamber, and its filter chamber has the extraordinary degree of depth 60～200mm, can form the filter cake of extraordinary thickness.
According to filter press of the present invention, it comprises switching hold-down mechanism, the filter plate between top board and lower platen and the filter cloth with top board and lower platen, the filtering dewatering method work that this filter press proposes according to the invention described above.
The invention has the advantages that and adopt unexpected easy method to improve the filtering means dehydration effect, simplify filter-plate structure, reduce consumable accessory and maintenance load.Not only manufacturing cost is minimized, and production cost also descends significantly.
Description of drawings
The following accompanying drawing by preferred embodiment and describe that the invention will be further described.
Fig. 1 is the side view according to a kind of filter press of the present invention; Part filter plate wherein is in the enable possition;
Fig. 2 is the cutaway view of being got along A-A line among Fig. 1.
The specific embodiment
As shown in Figure 1, filter press 10 of the present invention comprises that 13,2 of switching hold-down mechanisms with top board 11 and lower platen 12 are in 14,2 filter plates 14 ' that do not draw back as yet of filter plate of the state of drawing back, and every filter plate is equipped with walking of filter cloth mechanism 15 separately.
As shown in Figure 2, filter plate 14 of the present invention and filter plate 14 ' have filter chamber 16, filtrate chamber 17 and filter cloth 18.Filter plate 14, a side of 14 ' have suspension or Compressed Gas to enter the inlet 19 of filter chamber, and opposite side has filtrate or gas to flow out the outlet 20 in filtrate chamber.
According to the present invention, filter press 10 job steps are as follows:
1, compress filter plate: start and open and close hold-down mechanism 13, closed and compress whole filter plate 14,14 ' to form airtight filter chamber 16.
2, the feed press filtration of improvement: 19 be pressed into suspension by entering the mouth, promote liquid phase in the low suspension liquid at pressure and see through filter cloth 18 and enter filtrate chamber 17, and flow out from exporting 20 to filter chamber 16.Solid phase in the suspension is held back by filter cloth 18, when solid phase gathers suitable thickness, stops to be pressed into suspension.To the requirement of filter cake moisture content,, can take following improvement measure according to the character of suspension and user in order to obtain the lower filter cake of moisture content:
A repeats the feed press filtration: specifically be repetition feed press filtration one or many, repeat to send into Compressed Gas to filter chamber before the feed press filtration at every turn, dry up filter cake blink (for example 10～60 seconds).
B uses the pulse mode feed: specifically be to carry out the feed press filtration with membrane pump or similar mode.
C increases filter cake thickness: specifically be to increase filter cake thickness with measures such as improving feeding pressure, prolongation feed time.
D is used in combination several above-mentioned measures to obtain the lower filter cake of moisture content.
3, dry up filter cake: 19 send Compressed Gas to by entering the mouth, extract the residual suspension in the filter chamber 16 before this, dry up the liquid in the filter cake subsequently to filter chamber 16.
4, get rid of filter cake: start switching hold-down mechanism 13 and draw back whole filter plates 14, start 15 traction filter clothes, 18 walkings of walking of filter cloth mechanism subsequently, the filter cake that rests on the filter cloth 18 is unloaded from the row of transporting between the filter plate 14.So far, a working procedure is finished.
According to requirements of different users, can before drying up filter cake, increase the filter cake laundry operation: 19 be pressed into cleaning solution by entering the mouth, filter cake is washed to filter chamber 16.
Claims (8)
1, a kind of filtering dewatering method of filter press is characterized in that this method comprises following job step:
(1) closed impaction is equipped with most filter plates of filter cloth, forms airtight filter chamber;
(2) be pressed into the feed press filtration that the suspension that is filtered improves to filter chamber, up to filter cake at filter cloth surface aggregation suitable thickness;
(3) send into Compressed Gas to filter chamber and dry up filter cake;
(4) draw back filter plate and get rid of filter cake.
2, filtering dewatering method as claimed in claim 1, the feed press filtration that it is characterized in that described improvement comprises and at least once repeats the feed press filtration, and repeats to send into Compressed Gas to filter chamber before the feed press filtration at every turn and dry up filter cake.
3, filtering dewatering method as claimed in claim 1, the feed press filtration that it is characterized in that described improvement can be the feed press filtration of carrying out with pulse mode.
4, filtering dewatering method as claimed in claim 1, the feed press filtration that it is characterized in that described improvement can be to increase filter cake thickness.
5, filtering dewatering method as claimed in claim 1, the feed press filtration that it is characterized in that described improvement can be to be used in combination the described multiple measure of claim 2～4.
6, a kind of it comprises filter chamber, filtrate chamber in order to implement the filter press filter board as the described filtering dewatering method of one of claim 1 to 5, and the degree of depth that it is characterized in that its filter chamber is 60～200mm.
7, a kind of filter press that is used for suspension filtered, it comprises switching hold-down mechanism, the filter plate between fixation clip and movable pressing board and the filter cloth with fixation clip and movable pressing board, it is characterized in that at this filter press be by the described filtering dewatering method work of claim 1.
8, a kind of filter press that is used for suspension filtered, it comprises switching hold-down mechanism, the filter plate between fixation clip and movable pressing board and the strainer with fixation clip and movable pressing board, it is characterized in that the filter plate at this filter press is the described filter plate of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510064301 CN1846832A (en) | 2005-04-14 | 2005-04-14 | Filtering dewatering method for pressure filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510064301 CN1846832A (en) | 2005-04-14 | 2005-04-14 | Filtering dewatering method for pressure filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1846832A true CN1846832A (en) | 2006-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510064301 Pending CN1846832A (en) | 2005-04-14 | 2005-04-14 | Filtering dewatering method for pressure filter |
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| CN (1) | CN1846832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258608A (en) * | 2014-09-26 | 2015-01-07 | 吉首大学 | Magnetomotive air-sweeping type ore pulp filter press |
-
2005
- 2005-04-14 CN CN 200510064301 patent/CN1846832A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258608A (en) * | 2014-09-26 | 2015-01-07 | 吉首大学 | Magnetomotive air-sweeping type ore pulp filter press |
| CN104258608B (en) * | 2014-09-26 | 2015-10-14 | 吉首大学 | Magnetic moves air-sweeping type ore pulp filter press |
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