CN115382298A - Filtering material for solid-liquid separation, filter bag and online regeneration method thereof - Google Patents

Filtering material for solid-liquid separation, filter bag and online regeneration method thereof Download PDF

Info

Publication number
CN115382298A
CN115382298A CN202211155682.4A CN202211155682A CN115382298A CN 115382298 A CN115382298 A CN 115382298A CN 202211155682 A CN202211155682 A CN 202211155682A CN 115382298 A CN115382298 A CN 115382298A
Authority
CN
China
Prior art keywords
filter
bag
filter bag
layer
transition layer
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
Application number
CN202211155682.4A
Other languages
Chinese (zh)
Inventor
蔡伟龙
王巍
刘龙敏
余伟河
张鸿翔
洪晓云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingyuan Innovation Laboratory
Original Assignee
Qingyuan Innovation Laboratory
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingyuan Innovation Laboratory filed Critical Qingyuan Innovation Laboratory
Priority to CN202211155682.4A priority Critical patent/CN115382298A/en
Publication of CN115382298A publication Critical patent/CN115382298A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/27—Filter bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6484—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a translatory movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/265—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0246—Acrylic resin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Filtering Materials (AREA)

Abstract

The invention relates to a filtering material for solid-liquid separation, a filter bag and an online regeneration method thereof. The filter bag is a structure with two through ends and comprises a bag body and bag heads connected to the two ends of the bag body, elastic expansion rings are arranged in the bag heads, and the bag body and the bag heads are both made of filter materials. The on-line regeneration method of the filter bag comprises the following steps: manufacturing a filter material; making filter bags by using filter materials; the prepared filter bag is arranged in a box body of a filtering device; the upper end opening of the filter bag is communicated with the water inlet of the filter device, and the water outlet of the filter device is communicated with the outer side part of the filter bag; the mud scraping device in the filter bag periodically reciprocates up and down to scrape mud cakes on the water inlet layer on the inner side of the filter bag, so that the real-time filtration and the online regeneration of the filter bag are realized. The filter material and the filter bag have good solid-liquid separation effect, high filter precision and long service life.

Description

Filtering material for solid-liquid separation, filter bag and online regeneration method thereof
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a filtering material and a filter bag for solid-liquid separation and an online regeneration method thereof.
Background
In recent years, with the rapid development of urbanization and industrialization in China, the discharge amount of domestic wastewater increases year by year, so that natural water body deterioration and water resource pollution are severe. Therefore, the national attention and support for the environmental protection industry are continuously promoted, and the sewage treatment industry is rapidly developed.
In the prior art, common process methods in a sewage treatment system for treating solid-liquid separation include a filtration method and a precipitation method. The filtration method is to use a filter medium (screen, gauze, and particulate matter) to retain suspended matter in sewage, so that the filter medium is easily blocked, the flux needs to be recovered by manual and mechanical cleaning or replacement of the filter medium, the operation cost is increased, the operation of the process is complicated, and the used filter medium is often large in pore size, poor in filtration effect and short in service life. The sedimentation method is characterized in that the relative density of suspended matters in sewage is different from that of water, the suspended matters are separated by gravity sedimentation, and can be naturally settled, coagulated and chemically settled, and the like.
Disclosure of Invention
The invention aims to provide a filter material for solid-liquid separation, a filter bag and an online regeneration method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a filtering material for solid-liquid separation, filtering material is including stacking water inlet layer, transition layer and the play water layer together in proper order, water inlet layer is the melt-blown layer, the transition layer is coarse denier fibre acupuncture felt, water thorn felt or the compound felt of acupuncture water thorn, it is the PTFE microporous membrane to go out the water layer.
Furthermore, the gram weight of the filter material is 300-1000g/m 2 (ii) a Wherein the gram weight of the melt-blown layer is 50-200g/m 2 The gram weight of the transition layer is 250-800g/m 2 。
Furthermore, the fiber fineness of the melt-blown layer is 0.5-5 mu m, and the fiber fineness of the transition layer is 3.8dtex; the pore diameter of the melt-blown layer is 10-20 mu m, the pore diameter of the transition layer is 30-100 mu m, the pore diameter of the PTFE microporous membrane is 0.1-5 mu m, the average pore diameter is 2 mu m, and the thickness is 2-10 mu m.
Furthermore, the material of the melt-blown layer is polyester or polypropylene, and the material of the transition layer is one or a combination of more of terylene, polyphenylene sulfide, polyphenylsulfone sulfoxide, aramid fiber, polytetrafluoroethylene, polyimide, polysulfonamide and acrylic.
The invention also provides a filter bag based on the filter material for solid-liquid separation, the filter bag is of a structure with two through ends, the filter bag is composed of a bag body and bag heads connected to the two ends of the bag body, elastic expansion rings are arranged in the bag heads, and the bag body and the bag heads are both made of the filter material.
Furthermore, the water inlet layer and the water outlet layer of the filter material are respectively positioned at the inner side and the outer side of the filter bag; the shape and size of the elastic expansion ring are matched with the pore plate of the filtering device.
The invention also provides an online regeneration method of the filter bag, which comprises the following steps:
selecting a needling process, a spunlace process or a needling spunlace composite process according to the gram weight of the base material of the transition layer, and preparing the filter material by combining a melt-blowing technology and a hot-pressing film-covering technology; two bag heads and a bag body are made of filter materials, and then the three parts are sewn into filter bags with two through ends;
a plurality of prepared filter bags are arranged in a box body of a filtering device, and the upper bag head and the lower bag head of each filter bag are respectively arranged on an upper pore plate and a lower pore plate of the box body so as to keep the bag bodies of the filter bags in a vertical state; the upper end opening of the filter bag is communicated with the water inlet of the filter device, the water outlet of the filter device is communicated with the outer side part of the filter bag, so that sewage flows into the filter bag through the upper end opening of the filter bag, self-driven filtration is carried out through the self-power of the sewage, and purified water is discharged from the side part of the filter bag and is discharged through the water outlet;
the mud scraping device arranged in the filter bag periodically reciprocates up and down to periodically scrape mud cakes on the water inlet layer on the inner side of the filter bag, so that the real-time filtration and the online regeneration of the filter bag are realized.
Further, the specific manufacturing method of the filter material comprises the following steps: selecting one of a coarse denier fiber needled felt, a spunlace felt or a needled spunlace composite felt, and carrying out shaping, singeing and primary hot press polishing to obtain a transition layer; then drawing the transition layer on a roller, extruding polymer melt at a spinneret orifice of a rotary centrifugal die head by adopting high-speed hot air flow to form superfine fibers, collecting the superfine fibers on one surface of the transition layer on the roller to form a melt-blown layer, and then carrying out secondary hot press polishing; and finally, carrying out hot-pressing film covering treatment on the other surfaces of the PTFE microporous membrane and the transition layer to form tight and fine combination between the water outlet layer and the transition layer, thereby preparing the filter material.
Furthermore, the pressure of natural gas used for singeing is controlled to be 0.1-0.5MPa, and the mixing ratio of the natural gas to air is 1:1; the temperature of the hot pressing roller in the hot pressing is 60-200 ℃.
Furthermore, the mud scraping device mainly comprises a motor, a rotating shaft mechanism, a plurality of spiral steel rings, a plurality of pull ropes and a plurality of fixed pulleys; the rotating shaft mechanism consists of a rotating shaft horizontally arranged on the upper side of a filter bag in the box body and bearing seats at two ends of the rotating shaft, the bearing seats are arranged on the box body, and the rotating shaft is driven by a motor; each filter bag is provided with a spiral steel ring, and the size of the spiral steel ring is adapted to the inner side of the filter bag; the filter device is characterized in that the number of the filter bags arranged in the filter device is two, every two filter bags are in one group, the group of the filter bags is provided with three pull ropes and a fixed pulley, the fixed pulley is arranged at the lower sides of two spiral steel rings in one group, one pull rope bypasses the fixed pulley to be connected with the lower ends of the two spiral steel rings, the other two pull ropes are respectively connected with the upper ends of the two spiral steel rings and wound in the wire grooves of the rotating shaft in the opposite direction, so that when the motor rotates forwards or backwards, one pull rope is wound and the corresponding spiral steel ring is lifted upwards, and the spiral steel ring pulls the other spiral steel ring to move downwards through the pull rope on the fixed pulley, and one-up and one-down reciprocating mud scraping is formed.
Compared with the prior art, the invention has the following beneficial effects: the filtering material and the filtering bag provided by the invention are compounded with a multilayer gradient structure, so that the filtering precision of solid-liquid separation is improved, and the process of actual production is simplified. The water inlet layer adopts the melt-blown layer, the water outlet layer adopts the PTFE film covering technology, the melt-blown layer has large water outlet amount and moderate aperture, sludge is easy to slide, and the water quality of the outlet water is further improved by combining the PTFE film covering technology. According to the on-line regeneration method of the filter bag, the filter bag is in a through type design with double bag heads, a power source is not needed, self-driven filtration is carried out by virtue of the self power of sewage, and therefore energy is saved, consumption is reduced, and carbon is reduced. In addition, the method can realize the periodic cleaning of pollutants on the filter bag, not only realize the on-line regeneration of the filter bag and prolong the service life of the filter bag, but also improve the flux stability of solid-liquid separation, further improve the operation efficiency and realize high-efficiency water storage.
Drawings
FIG. 1 is a schematic illustration of the construction of a filter material according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a filter bag structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an implementation of the on-line regeneration method of the filter bag according to the embodiment of the invention.
Detailed Description
The invention is further explained by the following embodiments in conjunction with the drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, the present embodiment provides a filter material for solid-liquid separation, the filter material includes a water inlet layer 1, a transition layer 2, and a water outlet layer 3, which are sequentially stacked together, the water inlet layer is a melt-blown layer, the transition layer is a coarse denier fiber needle-punched felt, a spunlace felt, or a needle-punched spunlace composite felt, and the water outlet layer is a PTFE microporous membrane.
In this embodiment, the filter material has a grammage of 300-1000g/m 2 (ii) a Wherein the gram weight of the melt-blown layer is 50-200g/m 2 The gram weight of the transition layer is 250-800g/m 2 . The fineness of the fibers of the melt-blown layer is 0.5-5 mu m, and the fiber fineness of the transition layer is 3.8dtex. The pore diameter of the melt-blown layer is 10-20 μm, the pore diameter of the transition layer is 30-100 μm, and the pore diameter of the PTFE microporous membrane is0.1-5 μm, average pore diameter of 2 μm, and thickness of 2-10 μm.
In this embodiment, the material of the meltblown layer is polyester or polypropylene, and the material of the transition layer is one or a combination of polyester, polyphenylene sulfide, polyphenylsulfone sulfoxide, aramid, polytetrafluoroethylene, polyimide, polysulfonamide and acrylic.
As shown in fig. 2, the embodiment further provides a filter bag based on the filter material for solid-liquid separation, the filter bag is of a structure with two through ends, the filter bag is composed of a bag body 11 and bag heads 12 connected to two ends of the bag body 11, elastic expansion rings are arranged in the bag heads, and both the bag body 11 and the bag heads 12 are made of the filter material.
In order to install the filtering device applied to the embodiment, the water inlet layer 1 and the water outlet layer 3 of the filtering material are respectively positioned at the inner side and the outer side of the filtering bag; the shape and size of the elastic expansion ring are matched with the pore plate of the filtering device.
The embodiment also provides an online regeneration method of the filter bag, and the implementation structure of the online regeneration method is shown in fig. 3. The method comprises the following steps:
1) Selecting a needling process, a spunlace process or a needling spunlace composite process according to the gram weight of the base material of the transition layer, and preparing the filter material by combining a melt-blowing technology and a hot-pressing film-covering technology; two bag heads and a bag body are made of filter materials, and then the three parts are sewn into filter bags with two through ends by PTFE suture lines.
In this embodiment, the specific manufacturing method of the filter material is as follows: selecting one of a coarse denier fiber needled felt, a spunlace felt or a needled spunlace composite felt, and carrying out shaping, singeing and primary hot press polishing to obtain a transition layer; then drawing the transition layer on a roller, extruding polymer melt at a spinneret orifice of a rotary centrifugal die head by adopting high-speed hot air flow to form superfine fibers, collecting the superfine fibers on one surface of the transition layer on the roller to form a melt-blown layer, and then carrying out secondary hot press polishing; and finally, carrying out hot-pressing film covering treatment on the other surfaces of the PTFE microporous membrane and the transition layer to form tight and fine combination between the water outlet layer and the transition layer, thereby preparing the filter material.
Wherein the pressure of natural gas used for singeing is controlled to be 0.1-0.5MPa, and the mixing ratio of the natural gas to air is 1:1; the temperature of the hot pressing roller in the hot pressing is 60-200 ℃.
2) Installing a plurality of filter bags 101 prepared in the step 1) in a box body 102 of a filtering device, wherein the upper bag head and the lower bag head of each filter bag are respectively installed on an upper pore plate 103 and a lower pore plate 103 of the box body 102 so as to keep the bag bodies of the filter bags in a vertical state; the upper end opening of the filter bag 101 is communicated with the water inlet 104 of the filter device, the water outlet 105 of the filter device is communicated with the outer side part of the filter bag 101, so that sewage flows into the filter bag 101 through the upper end opening of the filter bag 101, self-driven filtration is carried out through the power of the sewage, and purified water is discharged from the side part of the filter bag 101 and is discharged through the water outlet 105.
3) The mud scraping device arranged in the filter bag 101 performs periodic up-and-down reciprocating motion to periodically scrape mud cakes on a water inlet layer on the inner side of the filter bag, so that real-time filtration and online regeneration of the filter bag are realized.
As shown in fig. 3, the mud scraping device mainly comprises a motor 106, a rotating shaft mechanism, a plurality of spiral steel rings 107, a plurality of pull ropes and a plurality of fixed pulleys 108; the rotating shaft mechanism consists of a rotating shaft 109 horizontally arranged on the upper side of a filter bag in the box body and bearing seats 110 at two ends of the rotating shaft, the bearing seats 110 are arranged on the box body 102, and the rotating shaft 109 is driven by a motor 106; a spiral steel ring 107 is arranged in each filter bag 101, and the size of the spiral steel ring 107 is matched with the inner side of the filter bag 101. The filter device is characterized in that the number of the filter bags arranged in the filter device is two, every two filter bags are in one group, one group is provided with three pull ropes and a fixed pulley, the fixed pulley 108 is arranged at the lower sides of two spiral steel rings 107 in one group, one pull rope 111 bypasses the fixed pulley 108 to be connected with the lower ends of the two spiral steel rings 107, the other two pull ropes 112 are respectively connected with the upper ends of the two spiral steel rings 107 and are wound in a wire groove of a rotating shaft 109 in the opposite direction, so that when a motor rotates forwards or backwards, one pull rope is wound and a corresponding spiral steel ring is lifted upwards, and the spiral steel ring pulls the other spiral steel ring to move downwards through the pull rope on the fixed pulley, so that reciprocating mud scraping is formed.
In the embodiment, the mud scraping device adopts a spring type spiral structure design, the spiral steel ring is a spiral structure formed by rotating a steel wire for 5-10 circles, and the diameter of the spiral steel ring is preferably 1-3mm larger than the diameter of the inner side of the filter bag. The shape of box can be cylinder, square, cuboid, anomalous cube etc. and the box can be according to the water dilatation, as sewage reaction tank.
When the filter bag is in operation, sewage flows into the filter bag 101 from the water inlet 104, and under the condition of no power source, part of sludge is adhered to the water inlet layer of the filter bag 101 through self-powered self-driven filtration of the sewage, so that a mud cake is formed. According to the invention, the mud scraping device is controlled to work periodically through an automation technology, the mud scraping speed is controlled to be 0.1-3 m/min and the water outlet flux is controlled, the mud cake is brought to the lower part of the box body 102 through the periodic reciprocating motion in the water inlet layer of the filter bag 101, and the real-time filtration and the online regeneration of the filter bag are realized.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a filter material for solid-liquid separation, its characterized in that, filter material is including the water inlet layer, transition layer and the play water layer of establishing together of piling up in proper order, the water inlet layer is the melt-blown layer, the transition layer is coarse denier fibre acupuncture felt, water thorn felt or acupuncture water thorn composite felt, it is PTFE microporous membrane to go out the water layer.
2. The filter medium for solid-liquid separation according to claim 1, wherein the filter medium has a grammage of 300 to 1000g/m 2 (ii) a Wherein the gram weight of the melt-blown layer is 50-200g/m 2 The gram weight of the transition layer is 250-800g/m 2 。
3. The filter material for solid-liquid separation according to claim 1, wherein the fineness of the fiber of the meltblown layer is 0.5 to 5 μm, and the fineness of the fiber of the transition layer is 3.8dtex; the pore diameter of the melt-blown layer is 10-20 mu m, the pore diameter of the transition layer is 30-100 mu m, the pore diameter of the PTFE microporous membrane is 0.1-5 mu m, the average pore diameter is 2 mu m, and the thickness is 2-10 mu m.
4. The filter material for solid-liquid separation according to claim 1, wherein the material of the melt-blown layer is polyester or polypropylene, and the material of the transition layer is one or more of polyester, polyphenylene sulfide, polyphenylsulfone sulfoxide, aramid, polytetrafluoroethylene, polyimide, polysulfonamide and acrylic.
5. A filter bag based on the filter material for solid-liquid separation according to any one of claims 1 to 4, wherein the filter bag has a through-type structure, the filter bag comprises a bag body and bag heads connected to both ends of the bag body, an elastic expansion ring is provided in the bag heads, and both the bag body and the bag heads are made of the filter material.
6. The filter bag according to claim 5, wherein the water inlet layer and the water outlet layer of the filter material are respectively located at the inner side and the outer side of the filter bag; the shape and size of the elastic expansion ring are matched with the pore plate of the filtering device.
7. An on-line regeneration method of the filter bag according to claim 6, comprising:
selecting a needling process, a spunlace process or a needling spunlace composite process according to the gram weight of the base material of the transition layer, and preparing the filter material by combining a melt-blowing technology and a hot-pressing laminating technology; two bag heads and a bag body are made of filter materials, and then the three parts are sewn into filter bags with two through ends;
a plurality of prepared filter bags are arranged in a box body of a filtering device, and the upper bag head and the lower bag head of each filter bag are respectively arranged on an upper pore plate and a lower pore plate of the box body so as to keep the bag bodies of the filter bags in a vertical state; the upper end opening of the filter bag is communicated with the water inlet of the filter device, the water outlet of the filter device is communicated with the outer side part of the filter bag, so that sewage flows into the filter bag through the upper end opening of the filter bag and is filtered in a self-driven manner by the self-power of the sewage, and purified water is discharged from the side part of the filter bag and is discharged through the water outlet;
the mud scraping device arranged in the filter bag periodically reciprocates up and down to periodically scrape mud cakes on the water inlet layer on the inner side of the filter bag, so that the real-time filtration and the online regeneration of the filter bag are realized.
8. The on-line regeneration method of the filter bag according to claim 7, wherein the specific manufacturing method of the filter material is as follows: selecting one of a coarse denier fiber needled felt, a spunlace felt or a needled spunlace composite felt, and carrying out shaping, singeing and primary hot press polishing to obtain a transition layer; then drawing the transition layer on a roller, extruding polymer melt at a spinneret orifice of a rotary centrifugal die head by adopting high-speed hot air flow to form superfine fibers, collecting the superfine fibers on one surface of the transition layer on the roller to form a melt-blown layer, and then carrying out secondary hot press polishing; and finally, carrying out hot-pressing film covering treatment on the other surfaces of the PTFE microporous membrane and the transition layer to form tight and fine combination between the water outlet layer and the transition layer, thereby preparing the filter material.
9. The on-line regeneration method of the filter bag according to claim 8, wherein the natural gas pressure for singeing is controlled to be 0.1-0.5MPa, and the mixture ratio of the natural gas to the air is 1:1; the temperature of the hot pressing roller in the hot pressing is 60-200 ℃.
10. The on-line regeneration method of a filter bag according to claim 7, wherein the mud scraper mainly comprises a motor, a rotating shaft mechanism, a plurality of spiral steel rings, a plurality of pull ropes and a plurality of fixed pulleys; the rotating shaft mechanism consists of a rotating shaft horizontally arranged on the upper side of the filter bag in the box body and bearing blocks at two ends of the rotating shaft, the bearing blocks are arranged on the box body, and the rotating shaft is driven by a motor; each filter bag is provided with a spiral steel ring, and the size of the spiral steel ring is adapted to the inner side of the filter bag; the filter device is characterized in that the number of the filter bags arranged in the filter device is two, every two filter bags are in a group, one group of the filter bags is provided with three pull ropes and a fixed pulley, the fixed pulley is arranged at the lower sides of two spiral steel rings in the group, one pull rope bypasses the fixed pulley to be connected with the lower ends of the two spiral steel rings, the other two pull ropes are respectively connected with the upper ends of the two spiral steel rings and are wound in a wire groove of the rotating shaft in the opposite direction, so that when a motor rotates forwards or backwards, one pull rope is wound and the corresponding spiral steel ring is lifted upwards, and the spiral steel ring pulls the other spiral steel ring to move downwards through the pull rope on the fixed pulley to form reciprocating mud scraping.
CN202211155682.4A 2022-09-22 2022-09-22 Filtering material for solid-liquid separation, filter bag and online regeneration method thereof Pending CN115382298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211155682.4A CN115382298A (en) 2022-09-22 2022-09-22 Filtering material for solid-liquid separation, filter bag and online regeneration method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211155682.4A CN115382298A (en) 2022-09-22 2022-09-22 Filtering material for solid-liquid separation, filter bag and online regeneration method thereof

Publications (1)

Publication Number Publication Date
CN115382298A true CN115382298A (en) 2022-11-25

Family

ID=84126059

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211155682.4A Pending CN115382298A (en) 2022-09-22 2022-09-22 Filtering material for solid-liquid separation, filter bag and online regeneration method thereof

Country Status (1)

Country Link
CN (1) CN115382298A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107080994A (en) * 2017-06-20 2017-08-22 湖北君集水处理有限公司 A kind of self-cleaning pot type filter separator
CN208340408U (en) * 2018-05-24 2019-01-08 安徽天顺环保设备股份有限公司 A kind of dedicated bag-type dust collecting equipment of Large Electric Furnace smoke gas treatment
CN211215884U (en) * 2019-12-10 2020-08-11 镇江市永益环保科技有限公司 Dust removal filter bag based on alkali-free bulked glass fiber cloth
CN114247212A (en) * 2021-12-20 2022-03-29 上海博格工业用布有限公司 Spunlace film-coated sticking strip and ultralow-emission dust removal filter bag
CN216395595U (en) * 2021-12-14 2022-04-29 厦门保瑞达环保科技有限公司 Composite filter cloth with cylindrical flow guide structure
CN216703548U (en) * 2021-11-11 2022-06-10 中国石油化工股份有限公司 Reinforced cleaning bag type filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107080994A (en) * 2017-06-20 2017-08-22 湖北君集水处理有限公司 A kind of self-cleaning pot type filter separator
CN208340408U (en) * 2018-05-24 2019-01-08 安徽天顺环保设备股份有限公司 A kind of dedicated bag-type dust collecting equipment of Large Electric Furnace smoke gas treatment
CN211215884U (en) * 2019-12-10 2020-08-11 镇江市永益环保科技有限公司 Dust removal filter bag based on alkali-free bulked glass fiber cloth
CN216703548U (en) * 2021-11-11 2022-06-10 中国石油化工股份有限公司 Reinforced cleaning bag type filter
CN216395595U (en) * 2021-12-14 2022-04-29 厦门保瑞达环保科技有限公司 Composite filter cloth with cylindrical flow guide structure
CN114247212A (en) * 2021-12-20 2022-03-29 上海博格工业用布有限公司 Spunlace film-coated sticking strip and ultralow-emission dust removal filter bag

Similar Documents

Publication Publication Date Title
CN201179367Y (en) Extrusion pressing type fibrous filter
CN206325269U (en) The continuous sand filtration apparatus of level stream
CN206350954U (en) A kind of micro-filtration fiber filter cloth
CN204601822U (en) A kind of have the active sand filter that sand machine carried by spiral
CN105169773B (en) A kind of online backflushing formula sewage-treatment plant
CN115382298A (en) Filtering material for solid-liquid separation, filter bag and online regeneration method thereof
CN202666524U (en) Improved laminated filter
KR20200011179A (en) The Unity type Purifying Water Filter for removing Virus and Bacteria
WO2015118223A1 (en) Method of purifying liquid by use of a particulate sorbent
CN102657965B (en) Compression-type high-precision efficient fiber ball filter
CN104841276A (en) Rolling oil super/micro filtration membrane purifying device
CN201840918U (en) Multistage high-efficiency fiber filter
CN201807224U (en) Multifunctional high-efficient filtering machine for lubricating oil products
CN103111104B (en) Oilfield wastewater filtering device
CN2481453Y (en) Full-automatic machine hydraulic oil filtering, cooling and circulation device
CN104941272B (en) A kind of efficient pigtail formula high spinning hypervelocity microstrainer
CN204768286U (en) Super micro -filtration membrane clarification plant of rolling oil
CN203556169U (en) Fiber bundle filter for filtering oilfield reinjection water
CN112479420A (en) High-efficient oil-water separator based on electrostatic spinning nanofiber membrane
CN2532069Y (en) Fibre fabric block filter
CN106492533A (en) A kind of sewage processing filtering device
CN201470154U (en) On-line automatic backwash oil-water separation device
CN109850997B (en) Vibration plane membrane group for sewage treatment
CN1220908A (en) Dewatering method-ultrafiltration dewatering
CN2239836Y (en) Fiber bundle filter

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