CN111957084A - Efficient energy-saving filter press and squeezing and filtering method based on filter press - Google Patents
Efficient energy-saving filter press and squeezing and filtering method based on filter press Download PDFInfo
- Publication number
- CN111957084A CN111957084A CN202010884885.1A CN202010884885A CN111957084A CN 111957084 A CN111957084 A CN 111957084A CN 202010884885 A CN202010884885 A CN 202010884885A CN 111957084 A CN111957084 A CN 111957084A
- Authority
- CN
- China
- Prior art keywords
- filter
- channel
- plate
- cavity
- squeezing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000706 filtrate Substances 0.000 claims abstract description 77
- 239000004744 fabric Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000001035 drying Methods 0.000 claims abstract description 41
- 238000001125 extrusion Methods 0.000 claims abstract description 40
- 239000011148 porous material Substances 0.000 claims abstract description 33
- 239000012065 filter cake Substances 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 12
- 238000007605 air drying Methods 0.000 claims description 2
- 208000028659 discharge Diseases 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses an efficient energy-saving filter press and a squeezing and filtering method based on the filter press. The filter press comprises a plurality of diaphragm plates and a plurality of filter plates which are alternately arranged on a frame, filter cavities capable of squeezing and filtering slurry are formed between the adjacent diaphragm plates and the filter plates, filter cloth is arranged in each filter cavity, at least one feeding channel, at least one filtrate channel and at least one extrusion channel are arranged on the plate frames, the feeding channel is communicated with each filter cavity through a corresponding distribution pore channel, the filtrate channel is communicated with each filter cavity through a corresponding liquid guide pore channel, and the extrusion channel is communicated with each pressure cavity through a corresponding flow guide pore channel; and the plate frames are also provided with at least one gas drying channel which can introduce compressed air into each filter cavity in the squeezing and filtering process, and the gas drying channel is communicated with each filter cavity through corresponding air-entraining pore passages. The invention can efficiently and reliably improve the dryness of the pressed filter cake, can greatly shorten the pressing and filtering period, and is efficient, energy-saving and economical.
Description
Technical Field
The invention relates to a filter press for solid-liquid separation, in particular to a high-efficiency energy-saving filter press and a squeezing and filtering method based on the filter press.
Background
The filter press is an important solid-liquid separation device applied to industrial production and is widely applied to the technical fields of wastewater, chemical industry, food, metallurgy, pharmacy and the like. A plate and frame filter press is a common type of filter press construction.
The plate-and-frame filter press mainly comprises a frame, a plurality of diaphragm plates and a plurality of filter plates which are alternately arranged on the frame (namely the diaphragm plates and the filter plates are alternately arranged in sequence), filter cloth positioned between the adjacent diaphragm plates and the filter plates and the like, wherein a filter cavity capable of squeezing and filtering slurry is formed between the adjacent diaphragm plates and the filter plates, and one side of each diaphragm plate, which corresponds to the filter plate, is provided with a pressure cavity capable of squeezing the filter cavity by virtue of a flexible diaphragm (such as a rubber membrane and the like) with good tightness. Generally, two upper corners of the plate frames (including each diaphragm plate and each filter plate) of the filter press are respectively provided with a feeding channel, two lower corners of the plate frames are respectively provided with a filtrate channel, the center of the lower part of the plate frames is provided with an extrusion channel, and each liquid inlet channel, each filtrate channel and the extrusion channel are formed by butt joint and combination according to the sequence of folding the plate frames (for example, a liquid inlet channel hole section on the diaphragm plate is axially butt joint with a liquid inlet channel hole section on the adjacent filter plate, so that the corresponding liquid inlet channel hole sections on all the plate frames are axially butt joint to form a complete liquid inlet channel, and the other channels are the same); each feed channel is respectively communicated with each filter cavity through a corresponding cloth pore channel (the cloth pore channel can be formed on the diaphragm plate or the filter plate, or can be formed on the diaphragm plate and the filter plate respectively), each filtrate channel is respectively communicated with each filter cavity through a corresponding liquid guide pore channel (the liquid guide pore channel can be formed on the diaphragm plate or the filter plate, or can be formed on the diaphragm plate and the filter plate respectively), and the extrusion channel is respectively communicated with each pressure cavity through a corresponding drainage pore channel (the drainage pore channel is formed on the diaphragm plate). The working process of squeezing and filtering is that all plate frames are folded in sequence to form a plurality of filtering cavities; the slurry is distributed in each filter cavity through a liquid inlet channel; introducing a fluid medium (e.g., compressed air or water) into each pressure chamber through the extrusion channel to expand the flexible membrane to extrude the slurry in the corresponding filter chamber; filtrate discharged by extrusion in each filter cavity is output through a filtrate channel; after the squeezing and filtering are finished, pulling the plate frames apart in sequence to open the corresponding filtering cavities to realize slag unloading; thus completing a filtering and squeezing work flow.
The squeezing and filtering effect of the filter press with the structure is realized by pressure chamber extrusion force on the diaphragm plate, the extrusion force of the pressure chamber is determined by a plurality of factors such as the introduction pressure of fluid media, the deformation of the flexible diaphragm, the matching relation of the filter chamber and the flexible diaphragm, and the squeezing with high dryness of the filter cake in the filter chamber is difficult to realize, so that the solid-liquid separation effect is poor, the liquid content of the filter cake is high, the squeezing and filtering period is long, and the economy is poor.
Disclosure of Invention
The technical purpose of the invention is as follows: aiming at the particularity of the plate-and-frame filter press and the defects of the prior art, the high-efficiency energy-saving filter press which can press and filter the filter cake in the filter cavity by the pressure cavity on the compressed air auxiliary diaphragm plate and the pressing and filtering method based on the filter press are provided.
The technical purpose of the invention is realized by the following technical scheme: a high-efficiency energy-saving filter press comprises a plurality of diaphragm plates and a plurality of filter plates which are alternately arranged on a frame, wherein filter cavities capable of squeezing and filtering slurry are formed between the adjacent diaphragm plates and the filter plates, filter cloth is arranged in each filter cavity, at least one feeding channel, at least one filtrate channel and at least one extrusion channel are arranged on the plate frames, the feeding channel is respectively communicated with each filter cavity through corresponding distributing pore channels, the filtrate channel is respectively communicated with each filter cavity through corresponding liquid guiding pore channels, and the extrusion channel is respectively communicated with each pressure cavity through corresponding drainage pore channels; and at least one gas drying channel which can introduce compressed air into each filter cavity in the squeezing and filtering process is also arranged on the plate frames, and the gas drying channels are respectively communicated with the filter cavities through corresponding air-entraining pore passages.
As one preferable scheme, the filtrate channels are at least two mutually independent channels, wherein one filtrate channel is also used as a gas drying channel.
As one preferable scheme, a plurality of bulges are formed on the flexible diaphragm extrusion working surface of the diaphragm plate, and liquid discharge slots are formed between the adjacent bulges; and a filter screen capable of forming a liquid drainage channel is arranged in the filter cavity of the filter plate. Furthermore, the bulges on the extrusion working surface of the flexible diaphragm are composed of a plurality of large-diameter bulges and a plurality of small-diameter bulges, the large-diameter bulges are arranged in the non-edge area of the flexible diaphragm, and the small-diameter bulges are arranged in the edge area of the flexible diaphragm and the area between the large-diameter bulges.
As one of the preferable schemes, the filter cloth arranged in the filter cavity formed by the diaphragm plate and the filter plate is of a double-layer structure, slurry is arranged between the two layers of filter cloth, the filter cloth on one side is correspondingly matched with the diaphragm plate, and the filter cloth on the other side is correspondingly matched with the filter plate. Furthermore, the filter cloth in the filter cavity and the filter cloth in the other filter cavities are of discontinuous independent structures. The double-layer structure filter cloth in the filter cavity is composed of two sides of the two.
The technical measures adopted by the squeezing and filtering method based on the high-efficiency energy-saving filter press are as follows:
and in the latter half of the squeezing and filtering of the slurry in the filtering cavity, the pressure cavity of the diaphragm plate is kept to continue squeezing and applying work, and compressed air is introduced into the air drying channel to perform wind power squeezing and drying treatment on the filter cake in the filtering cavity by the compressed air.
As one of the preferable schemes, the technical measures adopted by the squeezing filtration method are as follows:
-at least two mutually independent filtrate channels are present on the filter press;
keeping the pressure cavity of the diaphragm plate to continuously extrude and apply work in the later period of squeezing and filtering the slurry in the filter cavity, and introducing compressed air into one of the filtrate channels to enable the compressed air to carry out wind power extrusion drying treatment on the filter cake in the filter cavity;
the remaining filtrate channels maintain the filtrate output function.
Preferably, the compressed air is introduced in the time course of 1/2-1/4 left in the squeezing and filtering process.
The beneficial technical effects of the invention are as follows:
1. the invention aims at a plate-and-frame filter press, and a gas drying channel which can be respectively and correspondingly communicated with each filter cavity is formed on the original structure of the plate-and-frame filter press, so that compressed air can be respectively introduced into each filter cavity through the gas drying channel in the working process of squeezing and filtering, and the compressed air entering the filter cavities can assist a pressure cavity of a diaphragm plate to squeeze and dry a filter cake in the filter cavity, namely, wind power squeezing and drying treatment is assisted on the basis of the original pressure cavity squeezing treatment of the diaphragm plate, so that the dryness of the squeezed filter cake can be efficiently and reliably improved, the solid-liquid separation effect is effectively enhanced, meanwhile, the squeezing and filtering period can be greatly shortened, the efficiency is high, the energy is saved, and the economy and the practicability are; in addition, the filter cake can be loosened relatively in the filter cavity through the extrusion drying treatment of the compressed air on the filter cake, which is beneficial to realizing the subsequent efficient slag discharge treatment;
2. one of the filtrate channels of the plate-and-frame filter press is used as a gas drying channel, and a gas drying channel does not need to be additionally arranged on the plate frame, so that the plate-and-frame filter press is simple in structure and low in manufacturing cost (only the filtrate channel which is also used as the gas drying channel is communicated with a compressed air system through a switching valve), and is suitable for the transformation of a filter press in service and the forming of the newly-built filter press; therefore, all filtrate channels can be used when filtrate is required to be discharged in a large flow, and filter cakes can be effectively extruded by compressed air when compressed air is required to be introduced for wind extrusion drying treatment, so that the operation is flexible and convenient;
3. the flexible diaphragm structure of the diaphragm plate and the filter screen structure on one side of the filter plate are beneficial to enabling compressed air to efficiently and fully enter the filter cavity, efficiently and fully carry out wind power extrusion drying treatment on filter cakes in the filter cavity, and meanwhile ensure that the filter liquor subjected to the extrusion treatment can efficiently and smoothly flow, and the high efficiency and the energy saving performance are more outstanding; in addition, the large and small bulges on the flexible diaphragm are matched with the structure, so that the smooth flow of compressed air and the smooth flow of filtrate are powerfully guaranteed;
4. the double-layer filter cloth structure in the filter cavity is beneficial to enabling compressed air to efficiently and fully enter the filter cavity, performing efficient and sufficient wind extrusion drying treatment on filter cakes in the filter cavity, simultaneously ensuring that the squeezed filtrate can efficiently and smoothly flow, and being more outstanding in efficiency and energy conservation; in addition, the subsequent efficient slag discharging treatment is facilitated;
5. the squeezing and filtering method is directed at the plate-and-frame filter press, compressed air is introduced to carry out wind power squeezing and drying treatment on filter cakes in the filter cavity after the pressure chamber of the diaphragm plate is squeezed and filtered, so that the interference of introducing the compressed air to slurry which does not form the filter cakes in the filter cavity, squeezing force on the pressure chamber and flowing smoothness of large-flow filtrate in a premature way is effectively avoided, and the compressed air introduced after the squeezing and filtering can carry out efficient and sufficient wind power squeezing and drying treatment on the formed filter cakes which are filtered by the filtrate with less flow; in the process, the pressure cavity extrudes the filter cake and simultaneously forms a supporting effect, so that the waste of compressed air caused by ineffective work of the compressed air in a dispersed state of the filter cake due to sudden change of the space of the filter cavity in a pressure relief state of the pressure cavity is prevented, and the efficiency and the energy are high;
6. according to the squeezing and filtering method, one of the filtrate channels is also used as a gas drying channel, so that when large-flow filtrate in the first half of squeezing and filtering is filtered out, the filtrate is efficiently discharged by starting all the filtrate channels; when the low-flow filtrate in the latter half of the squeezing filtration is filtered out, compressed air is introduced into one filtrate channel to assist the pressure cavity to efficiently squeeze the filter cake in the filter cavity, so that the liquid contained in the filter cake is accelerated and sufficiently discharged, the efficiency is good, the squeezing filtration process is greatly shortened, and the economical efficiency is excellent.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of the diaphragm plate in fig. 1.
Fig. 3 is a schematic structural view of the filter plate of fig. 1.
The reference numbers in the figures mean: 1-a diaphragm plate; 101-a flexible membrane; 102-a bump; 2, filtering the plate; 3, filtering cloth; 4-a stay bar; 5, filtering by using a filter screen; 6-filter cake; 7-a feed channel; 8-extruding the channel; 9-filtrate channel one; 10-a liquid leading pore channel I; 11-filtrate channel two; 12-liquid leading pore canal two.
Detailed Description
The present invention relates to a filter press for solid-liquid separation, and more particularly, to an energy-efficient filter press and a method of press filtration using the same, and the main technical contents of the present invention will be described in detail below with reference to a plurality of examples. In embodiment 1, the technical contents of the present invention are clearly and specifically explained with reference to the drawings in the specification, i.e., fig. 1, fig. 2 and fig. 3, and although the drawings are not separately drawn in other embodiments, the main structure of the embodiments can still refer to the drawings of embodiment 1.
It is expressly noted here that the drawings of the present invention are schematic and have been simplified in unnecessary detail for the purpose of clarity and to avoid obscuring the technical solutions that the present invention contributes to the prior art.
Example 1
The invention relates to a plate-and-frame filter press which mainly comprises a frame, a pressing plate (namely a diaphragm plate or a filter plate with a filter cavity on one side) and a thrust plate (namely the diaphragm plate or the filter plate with the filter cavity on one side) which are assembled on a main beam of the frame, an intermediate plate frame (namely the diaphragm plate and the filter plate with the filter cavity on two sides) which is assembled on the main beam between the pressing plate and the thrust plate, filter cloth which is arranged between every two adjacent plate frames, a feeding system, a liquid drainage system, a hydraulic system, a compressed air system and the like.
Referring to fig. 1, 2 and 3, for convenience of description, the plate frames on the frame are divided into membrane plates 1 and filter plates 2, that is, the plate frames on the frame are a plurality of membrane plates 1 and a plurality of filter plates 2 alternately arranged.
The filter cavity of the diaphragm plate 1 is internally provided with a flexible diaphragm 101 forming a pressure cavity with the diaphragm plate substrate, a plurality of bulges 102 are formed on the extrusion working surface of the flexible diaphragm 101, the bulges 102 are composed of a plurality of large-diameter bulges and a plurality of small-diameter bulges, and drainage slots are formed between the adjacent bulges 102. Specifically, the large-diameter protrusions are arranged in the non-edge region of the flexible diaphragm 101, the small-diameter protrusions are arranged in the edge region of the flexible diaphragm 101 and the region between the large-diameter protrusions, and no matter whether the large-diameter protrusions or the small-diameter protrusions are arranged, an inwards concave liquid discharge slot is formed between every two adjacent protrusions 102; the diameter of the large diameter protrusion is typically about 2 to 3 times (e.g., 2 or 3 times, etc.) the diameter of the small diameter protrusion.
Two corners of the upper part of the base plate of the diaphragm plate 1 are respectively provided with a hole section for forming a corresponding feeding channel 7, two corners of the lower part of the base plate are respectively provided with a hole section for forming a corresponding filtrate channel (namely a filtrate channel I9 and a filtrate channel II 11), and the center of the lower part of the base plate is provided with a hole section for forming an extrusion channel 8. Correspondingly, two corners of the upper part of the base plate of the filter plate 2 are respectively provided with a hole section for forming a corresponding feeding channel 7, two corners of the lower part of the base plate are respectively provided with a hole section for forming a corresponding filtrate channel (namely a filtrate channel I9 and a filtrate channel II 11), and the center of the lower part of the base plate is provided with a hole section for forming an extrusion channel 8. After the diaphragm plates 1 and the filter plates 2 which are alternately arranged are folded in sequence, the corresponding hole sections at two corners of the upper part are axially butted and combined together to form corresponding feeding channels 7, and each feeding channel 7 is connected with a feeding system; the corresponding hole sections at one corner of the lower part are axially butted and combined together to form a corresponding filtrate channel I9, the corresponding hole sections at the other corner of the lower part are axially butted and combined together to form a corresponding filtrate channel II 11, and the filtrate channel I9 and the filtrate channel II 11 are respectively connected with a liquid drainage system; the corresponding hole sections at the center are axially butted and combined together to form an extrusion channel 8, and the extrusion channel 8 is connected with a compressed air system (also can be a high-pressure water system). In the structure, each feeding channel 7 is respectively communicated with each filter cavity through a corresponding distributing pore (the distributing pore can be singly formed on a diaphragm plate, a filter plate or the diaphragm plate and the filter plate); the filtrate channel I9 is respectively communicated with each filter cavity through a corresponding liquid guide pore channel I10 (the liquid guide pore channel I can be singly formed on a diaphragm plate, a filter plate or the diaphragm plate and the filter plate); the second filtrate channel 11 is respectively communicated with each filter cavity through a corresponding second liquid guide pore channel 12 (the second liquid guide pore channel can be singly formed on a diaphragm plate, a filter plate or the diaphragm plate and the filter plate); the extrusion channel 8 is respectively communicated with each pressure cavity through a corresponding drainage channel (the drainage channel is formed on the diaphragm plate).
The first filtrate channel 9 and the second filtrate channel 11 are distinguished because one of the filtrate channels needs to double as a gas drying channel. In this embodiment, the first filtrate channel 9 also serves as a gas drying channel, and the second filtrate channel 11 is always a filtrate channel. Thus, the second filtrate channel 11 does not double as a gas drying channel, which is conventionally connected in a drainage system. The filtrate channel I9 is also used as a gas drying channel, is connected in a liquid discharge system according to a traditional structure, and is also connected in a compressed air system through a switching valve; preferably, the compressed air system is connected upstream of the filtrate channel one 9, and the switching valve is preferably a one-way valve, i.e. the gas in the compressed air system is controlled to be input into the filtrate channel one 9 only, and the filtrate in the filtrate channel one 9 is not input into the compressed air system.
A filter screen 5 which is closely attached to the base plate of the filter plate 2 and can form a liquid discharge passage in the filter chamber of the filter plate 2 is disposed in the filter chamber of the filter plate 2.
In the arrangement structure of the diaphragm plates 1 and the filter plates 2, a filter cavity which can contain slurry and squeeze and filter the slurry is formed between the adjacent diaphragm plates 1 and the adjacent filter plates 2. An independent filter cloth 3 is arranged in each filter cavity, and the independence means that the filter cloth in the current filter cavity is not discontinuous with the filter cloth in the rest filter cavities, namely the filter cloth 3 in each filter cavity exists independently. The filter cloth 3 arranged in each filter cavity is of a double-layer structure, the filter cloth 3 with the double-layer structure is formed by winding and drooping the two sides of the filter cloth hung on the corresponding support rods 4, one side of the winding and drooping is correspondingly matched with the flexible diaphragm 101 in the filter cavity of the diaphragm plate 1, and the other side of the winding and drooping is correspondingly matched with the filter screen 5 in the filter cavity of the filter plate 2; the space between the two layers of filter cloth 3 is used for arranging slurry, namely, the corresponding cloth pore passage on the feeding channel 7 corresponds to the space between the two layers of filter cloth 3 in the filter cavity.
The method for controlling the work of the pressing and filtering of the filter press (namely the using method) comprises the following steps:
each plate frame on the frame is folded in sequence to form a plurality of filter cavities, and each channel is also formed by butt joint in sequence;
-arranging the pulp in each filter chamber through the inlet channel 7;
after the feed is completed, a fluid medium (for example compressed air or water, etc.) is introduced into each pressure chamber through the squeezing channel 8, causing the flexible membrane 101 to expand and squeeze the slurry in the corresponding filter chamber;
most of the filtrate squeezed and discharged from each filter chamber is discharged through the filtrate channel one 9 and the filtrate channel two 11 until about 2/3 time intervals of the whole squeezing and filtering process are completed (namely about 1/3 time intervals remain in the whole squeezing and filtering process), the pressure chambers of the diaphragm plates 1 are kept to continue squeezing and working, meanwhile, a switching valve connected to the filtrate channel one 9 is opened, and compressed air is conducted (the filtrate channel two 11 keeps the filtrate output function thereof), so that the compressed air enters the pressure chambers of the auxiliary diaphragm plates 1 in each corresponding filter chamber to squeeze and work, and the compressed air carries out wind force squeezing and drying treatment on the filter cakes 6 in the filter chambers;
until the squeezing and filtering treatment is finished, stopping supplying air into the first filtrate channel 9 by switching a valve, and removing the pressure in the pressure cavity of the diaphragm plate 1; and pulling a plate and discharging slag.
The squeezing and filtering method with the matching of the diaphragm plate extrusion and the wind power extrusion drying is compared with the traditional squeezing and filtering method by only relying on the diaphragm plate extrusion, and the test result shows that: under the condition that the filter residue basically keeps the same dryness, the squeezing and filtering period of the invention is shortened by more than half compared with the traditional method, and the efficiency is greatly and obviously improved.
The squeezing and filtering method combining the diaphragm plate extrusion and the wind power extrusion drying is also compared with a squeezing and filtering method (called as a 'first pressing and then blowing method' for short) that the diaphragm plate is extruded and then compressed air is introduced for wind power extrusion drying, and the test result shows that: under the condition that the filter residue basically keeps the same dryness, the squeezing and filtering period of the invention is shortened by more than 4 minutes compared with the 'first pressing and then blowing method', the compressed air is saved by more than 40 percent, and the obvious high efficiency and energy saving performance are still kept. The reason is that the space of the filter cavity is enlarged after the pressure cavity is depressurized, one part of compressed air entering the filter cavity cannot be effectively and fully contacted with a filter cake and is directly discharged through a filter liquid channel, the other part of compressed air acts on the filter cake, but the compressed air acting on the filter cake enables the filter cake to be dispersed and deformed in the empty filter cavity to generate a large number of air leakage cracks, and most of the compressed air acting on the filter cake flows through the cracks and is discharged into the filter liquid channel to be discharged.
Example 2
The invention relates to a plate-and-frame filter press which mainly comprises a frame, a pressing plate (namely a diaphragm plate or a filter plate with a filter cavity on one side) and a thrust plate (namely the diaphragm plate or the filter plate with the filter cavity on one side) which are assembled on a main beam of the frame, an intermediate plate frame (namely the diaphragm plate and the filter plate with the filter cavity on two sides) which is assembled on the main beam between the pressing plate and the thrust plate, filter cloth which is arranged between every two adjacent plate frames, a feeding system, a liquid drainage system, a hydraulic system, a compressed air system and the like.
For convenience of description, the plate frames on the frame are divided into membrane plates and filter plates, that is, the plate frames on the frame are a plurality of membrane plates and a plurality of filter plates alternately arranged.
The filter cavity of the diaphragm plate is internally provided with a flexible diaphragm which forms a pressure cavity with the diaphragm plate substrate, a plurality of bulges are formed on the extrusion working surface of the flexible diaphragm, the bulges are composed of a plurality of large-diameter bulges and a plurality of small-diameter bulges, and liquid discharge slots are formed between the adjacent bulges. Specifically, the large-diameter bulges are arranged in the non-edge area of the flexible diaphragm, the small-diameter bulges are arranged in the edge area of the flexible diaphragm and the area between the large-diameter bulges, and no matter the large-diameter bulges or the small-diameter bulges, concave liquid discharge slots are arranged between the adjacent bulges; the diameter of the large diameter protrusion is typically about 2 to 3 times (e.g., 2 or 3 times, etc.) the diameter of the small diameter protrusion.
Two corners of the upper part of the base plate of the diaphragm plate are respectively provided with a hole section for forming a corresponding feeding channel, two corners of the lower part of the base plate are respectively provided with a hole section for forming a corresponding filtrate channel, one side of the center of the lower part of the base plate is provided with a hole section for forming an extrusion channel, and the other side of the center of the lower part of the base plate is provided with a hole section for forming a gas drying channel. Correspondingly, two corners of the upper part of the base plate of the filter plate are respectively provided with a hole section for forming a corresponding feeding channel, two corners of the lower part of the base plate are respectively provided with a hole section for forming a corresponding filtrate channel, one side of the center of the lower part of the base plate is provided with a hole section for forming an extrusion channel, and the other side of the center of the lower part of the base plate is provided with a hole section for forming a gas drying channel. After the diaphragm plates and the filter plates which are alternately arranged are folded in sequence, the corresponding hole sections at the two corners of the upper part are axially butted and combined together to form corresponding feeding channels, and each feeding channel is connected with a feeding system; the corresponding hole sections at the two corners of the lower part are axially butted and combined together to form corresponding filtrate channels, and each filtrate channel is connected with a liquid drainage system; the corresponding hole sections on one side of the center of the lower part are axially butted and combined together to form a corresponding extrusion channel, and the extrusion channel is connected with a compressed air system (also can be a high-pressure water system); the corresponding hole sections on the other side of the center of the lower part are axially butted and combined together to form a corresponding gas drying channel, and the gas drying channel is connected with a compressed air system. In the structure, each feeding channel is respectively communicated with each filter cavity through a corresponding distributing pore passage (the distributing pore passage can be singly formed on a diaphragm plate, a filter plate or the diaphragm plate and the filter plate); each filtrate channel is respectively communicated with each filter cavity through a corresponding liquid guide pore passage (the liquid guide pore passage can be singly formed on a diaphragm plate, a filter plate or the diaphragm plate and the filter plate); the extrusion channel is respectively communicated with each pressure cavity through a corresponding drainage pore channel (the drainage pore channel is formed on the diaphragm plate); the gas drying channel is respectively communicated with each filter cavity through a corresponding gas introducing pore passage (the gas introducing pore passage can be singly formed on the diaphragm plate, the filter plate or the diaphragm plate and the filter plate).
And a filter screen which is tightly attached to the filter plate base plate and can form a liquid drainage channel in the filter cavity of the filter plate is arranged in the filter cavity of the filter plate.
In the arrangement structure of the diaphragm plates and the filter plates, a filter cavity which can contain slurry and squeeze and filter the slurry is formed between the adjacent diaphragm plates and the adjacent filter plates. An independent filter cloth is arranged in each filter cavity, and the independence means that the filter cloth in the current filter cavity is not discontinuous with the filter cloth in the rest filter cavities, namely the filter cloth in each filter cavity exists independently. The filter cloth arranged in each filter cavity is of a double-layer structure, the double-layer structure filter cloth is formed by winding droops at two sides of the filter cloth hung on corresponding support rods, one side of the winding droops is correspondingly matched with a flexible diaphragm in the filter cavity of the diaphragm plate, and the other side of the winding droops is correspondingly matched with a filter screen in the filter cavity of the filter plate; the two layers of filter cloth are used for arranging slurry, namely, the corresponding cloth pore passage on the feeding channel corresponds to the space between the two layers of filter cloth in the filter cavity.
The method for controlling the work of the pressing and filtering of the filter press (namely the using method) comprises the following steps:
each plate frame on the frame is folded in sequence to form a plurality of filter cavities, and each channel is also formed by butt joint in sequence;
-arranging the slurry in each filter chamber through a feed channel;
after the feed is completed, a fluid medium (for example compressed air or water, etc.) is introduced into each pressure chamber through the squeezing channel, causing the flexible membrane to expand and squeeze the slurry in the corresponding filter chamber;
most of the filtrate squeezed and discharged from each filter chamber is discharged through the filtrate channel until about 2/3 time passes of the whole squeezing and filtering process are completed (i.e. about 1/3 time passes remain in the whole squeezing and filtering process), the pressure chambers of the diaphragm plates are kept to continue squeezing and working, meanwhile, the gas drying channel is opened, compressed air is conducted to enter the pressure chambers of the auxiliary diaphragm plates in each corresponding filter chamber to squeeze and work, and the compressed air carries out wind force squeezing and drying treatment on the filter cakes in the filter chambers;
-stopping the supply of gas into the gas drying channel and removing the pressure in the pressure chamber of the diaphragm plate until the press filtration process is completed; and pulling a plate and discharging slag.
Example 3
The other contents of this embodiment are the same as those of embodiment 1 or 2, except that: compressed air was introduced into each filter chamber through the air dryer passage until about 1/2 hours of the entire press filtration process was completed (i.e., about 1/2 hours of the entire press filtration process remained).
Example 4
The other contents of this embodiment are the same as those of embodiment 1 or 2, except that: compressed air was introduced into each filter chamber through the air dryer passage until about 3/4 hours of the entire press filtration process was completed (i.e., about 1/4 hours of the entire press filtration process remained).
The above examples are intended to illustrate the invention, but not to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the specific technical scheme in each embodiment can be modified or part of technical features can be replaced equivalently, for example, all bulges on the flexible diaphragm of the diaphragm plate are of an equal-diameter structure, and for example, two layers of filter cloth in the same filter cavity are composed of two filter cloths which are independent and arranged side by side; and such modifications or substitutions do not depart from the spirit and scope of the present invention in its essence.
Claims (10)
1. A high-efficiency energy-saving filter press comprises a plurality of diaphragm plates (1) and a plurality of filter plates (2) which are alternately arranged on a frame, wherein filter cavities capable of squeezing and filtering slurry are formed between the adjacent diaphragm plates (1) and the filter plates (2), filter cloth (3) is arranged in each filter cavity, at least one feeding channel (7), at least one filtrate channel and at least one extrusion channel (8) are arranged on the plate frames, the feeding channel (7) is respectively communicated with the filter cavities through corresponding distributing channels, the filtrate channel is respectively communicated with the filter cavities through corresponding liquid guiding channels, and the extrusion channel (8) is respectively communicated with the pressure cavities through corresponding liquid guiding channels; the filter is characterized in that at least one gas drying channel which can introduce compressed air into each filter cavity in the squeezing and filtering process is further arranged on the plate frames, and the gas drying channels are respectively communicated with the filter cavities through corresponding air-entraining pore passages.
2. The filter press according to claim 1, wherein the filtrate channel is at least two independent channels, and one of the filtrate channels doubles as a gas drying channel.
3. The filter press of claim 1, wherein the flexible diaphragm (101) of the diaphragm plate (1) is provided with a plurality of protrusions (102) on the pressing surface, and drainage slots are formed between adjacent protrusions (102); and a filter screen (5) capable of forming a liquid drainage channel is arranged in the filter cavity of the filter plate (2).
4. The filter press according to claim 3, wherein the protrusions (102) on the pressing surface of the flexible membrane (101) are composed of a plurality of large diameter protrusions arranged on the non-edge area of the flexible membrane (101) and a plurality of small diameter protrusions arranged on the edge area of the flexible membrane (101) and between the large diameter protrusions.
5. The high-efficiency energy-saving filter press according to claim 1 or 3, wherein the filter cloth (3) arranged in the filter chamber formed by the diaphragm plate (1) and the filter plate (2) is of a double-layer structure, slurry is arranged between the two layers of filter cloth (3), one side of the filter cloth is correspondingly matched with the diaphragm plate (1), and the other side of the filter cloth is correspondingly matched with the filter plate (2).
6. The filter press according to claim 5, wherein the filter cloth (3) in the filter chamber is a discontinuous independent structure from the filter cloth in the other filter chambers.
7. The filter press according to claim 5, wherein the double-layer structure of the filter cloth (3) in the filter chamber is composed of two sides of the filter cloth which are wound and drooped back and forth and hung on the support rods (4).
8. The method for press filtration of the high-efficiency energy-saving press filter according to claim 1, wherein the technical measures adopted by the method for press filtration are as follows:
and in the latter half of the squeezing and filtering of the slurry in the filtering cavity, the pressure cavity of the diaphragm plate is kept to continue squeezing and applying work, and compressed air is introduced into the air drying channel to perform wind power squeezing and drying treatment on the filter cake in the filtering cavity by the compressed air.
9. The method for press filtration of the high-efficiency energy-saving press filter according to claim 8, wherein the technical measures adopted by the method for press filtration are as follows:
-at least two mutually independent filtrate channels are present on the filter press;
keeping the pressure cavity of the diaphragm plate to continuously extrude and apply work in the later period of squeezing and filtering the slurry in the filter cavity, and introducing compressed air into one of the filtrate channels to enable the compressed air to carry out wind power extrusion drying treatment on the filter cake in the filter cavity;
the remaining filtrate channels maintain the filtrate output function.
10. The press filtration method of the high-efficiency energy-saving press filter according to claim 8 or 9, wherein the compressed air is introduced at the time of 1/2-1/4 remaining in the press filtration process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884885.1A CN111957084A (en) | 2020-08-28 | 2020-08-28 | Efficient energy-saving filter press and squeezing and filtering method based on filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884885.1A CN111957084A (en) | 2020-08-28 | 2020-08-28 | Efficient energy-saving filter press and squeezing and filtering method based on filter press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111957084A true CN111957084A (en) | 2020-11-20 |
Family
ID=73401092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010884885.1A Pending CN111957084A (en) | 2020-08-28 | 2020-08-28 | Efficient energy-saving filter press and squeezing and filtering method based on filter press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111957084A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058303A (en) * | 2021-03-29 | 2021-07-02 | 湖北山特莱新材料有限公司 | Filter plate of filter press for recovering ethylene glycol |
| CN113797614A (en) * | 2021-09-30 | 2021-12-17 | 金锣水务有限公司 | Filter pressing assembly, filter press and filter pressing method |
-
2020
- 2020-08-28 CN CN202010884885.1A patent/CN111957084A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058303A (en) * | 2021-03-29 | 2021-07-02 | 湖北山特莱新材料有限公司 | Filter plate of filter press for recovering ethylene glycol |
| CN113797614A (en) * | 2021-09-30 | 2021-12-17 | 金锣水务有限公司 | Filter pressing assembly, filter press and filter pressing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111957084A (en) | Efficient energy-saving filter press and squeezing and filtering method based on filter press | |
| CN111603815A (en) | Double-hole parallel feeding chamber type main and auxiliary plate combined filter chamber and double-feeding chamber type filter press | |
| JP4911369B2 (en) | Filter press with built-in large capacity diaphragm | |
| CN210728783U (en) | Split type feed channel and backwashing reverse-blowing air-dried filter plate assembly | |
| CN212283041U (en) | High-efficiency energy-saving filter press | |
| CN212440217U (en) | Double-hole parallel feeding chamber type main and auxiliary plate combined filter chamber and double-feeding chamber type filter press | |
| CN214512950U (en) | Bidirectional inlet and outlet multifunctional filtering mechanism and corresponding efficient large-scale chamber type filter press | |
| WO2021253504A1 (en) | Method for dewatering of sludge fed from dynamic feeding channel, and plate-and-frame (box-type) dewatering machine | |
| CN212283034U (en) | Energy-saving filter press | |
| CN210419682U (en) | Plate-and-frame filter press convenient for mud unloading | |
| CN112044126A (en) | Energy-saving squeezing and filtering method and filter press | |
| CN216878014U (en) | Water-saving diaphragm filter press | |
| CN112516633B (en) | Air energy filter press and using method thereof | |
| CN212523164U (en) | Wind-assisted cake discharging device of automatic diaphragm filter press and corresponding wind-assisted cake discharging type pulling plate mechanism | |
| CN212440204U (en) | Press gas recycling device of press filter and energy-saving diaphragm press filter | |
| CN214344663U (en) | Strong-sealing filter pressing assembly for plate frame sludge filter press | |
| JP2020049454A (en) | Operational method of filter press | |
| CN201431810Y (en) | Novel reinforced polypropylene filter press | |
| CN213313539U (en) | Air filter that security is strong | |
| CN108325246B (en) | Pressure filter with cleaning function | |
| JP2000334222A (en) | Filter press device and method for dehydrating sludge | |
| CN217312141U (en) | Novel external ear type filter press | |
| CN219440799U (en) | Hydraulic filter press | |
| CN205055529U (en) | Adopt plate filtration device of filter unit constitution | |
| CN218944443U (en) | Backwash single-chamber feeding filter press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240422 Address after: 618400 Muguaping Village, Hongbai Town, Shifang City, Deyang City, Sichuan Province Applicant after: SHIFANG XINSHIDAI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 618200 Mianzhu High-tech Industrial Park, Deyang City, Sichuan Province, No. 6 South Passage of Jiangsu Industrial Park Applicant before: Sichuan Baokai Xincheng Environmental Protection Technology Co.,Ltd. Country or region before: China |