WO2008077258A1 - Filtre-sécheur - Google Patents

Filtre-sécheur Download PDF

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Publication number
WO2008077258A1
WO2008077258A1 PCT/CH2006/000738 CH2006000738W WO2008077258A1 WO 2008077258 A1 WO2008077258 A1 WO 2008077258A1 CH 2006000738 W CH2006000738 W CH 2006000738W WO 2008077258 A1 WO2008077258 A1 WO 2008077258A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
unit
dryer
drying
filtration
Prior art date
Application number
PCT/CH2006/000738
Other languages
German (de)
English (en)
Inventor
Egidio Naso
Original Assignee
Drm, Dr. Müller Ag
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 Drm, Dr. Müller Ag filed Critical Drm, Dr. Müller Ag
Priority to PCT/CH2006/000738 priority Critical patent/WO2008077258A1/fr
Publication of WO2008077258A1 publication Critical patent/WO2008077258A1/fr

Links

Classifications

    • 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
    • B01D29/114—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 arranged for inward flow filtration
    • 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
    • B01D29/52—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 in parallel connection
    • 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
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • 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
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
    • B01D29/84—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
    • B01D29/843—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating by direct contact with a fluid

Definitions

  • the present invention relates to a device for filtering and drying a suspended in a liquid solid, consisting of a filter unit and a dryer unit.
  • a device for filtering and drying a suspended in a liquid solid consisting of a filter unit and a dryer unit.
  • a solution for example a precipitate or a crystallized reaction product.
  • products having a solids content of 65% by weight, which are considered to be dewatered, products having a higher solids content, more than 95% by weight can only be obtained with dryers and are referred to as dried.
  • Filtration and drying are generally carried out in certain separate equipment.
  • the dewatered residue obtained on the filter elements of a filter apparatus is removed from the filter elements and transported to a drying apparatus (US 5,670,061).
  • a drying apparatus US 5,670,061.
  • the use of separate equipment has severe disadvantages and requires elaborate processing and transportation of the product, which not only poses logistical problems but also poses the risk of contamination and contamination of workers in contact with a harmful product.
  • Such problems arise, especially in the chemical-pharmaceutical field and in the food industry. This applies in all cases where there is an increased requirement for the purity of a product.
  • special precautionary measures must be taken to avoid spreading the product even in the environment of the workplace.
  • a process for drying a solid in a candle filter is known from EP-A1-0 002 847.
  • the solid filter residue is treated after filtration with hot compressed air.
  • the hot compressed air is fed to the filter via a single pipe.
  • the air flows through the filter cake over the path of the least resistance and thus leads to an inhomogeneous drying.
  • EP-A1-0 553 438 describes a method for filtration, wherein during the filtration process, the filter is cleaned at intervals and periodically discharged via a closure member of the highly liquid flowable wet sludge. Drying is not provided.
  • An apparatus for continuous filtration and drying within an apparatus is known from US Pat. No.
  • a plate pressure filter which consists of substantially flat filter elements, which are arranged horizontally in the interior of a container.
  • the dehydrated product collects on the surface of the filter disk while the liquid is being conveyed out of the container.
  • the drying is carried out in the same apparatus, wherein the container is heated and possibly placed under vacuum.
  • Such devices which are unsatisfactory in addition to the low performance on the whole, have the other Disadvantage alternately as a filter and to work as a dryer. It is therefore not possible, while carrying out the filtration, to dry the already filtered material and vice versa.
  • the service life and downtime are also relatively long (DE-A-32 21 148).
  • Object of the present invention is to provide a device for
  • Device solved which consists of a filter unit of a closed container with at least one candle filter element for receiving the solid and is connected to a closed container of the dryer unit, via a pipe for mutual flow exchange between the filter unit and the dryer unit.
  • the device according to the invention has a simple construction and operation, it can be relatively easily and economically produced and is for the continuous performance of filtration and
  • the units of filtration and drying can also work simultaneously, taking into account the amount of materials to be treated. This gives a dried product with increased solids content, without risk of contamination; avoiding any risk of toxic or undesirable products from spreading to the environment, protecting workers from exposure to potentially dangerous products for their health.
  • the dehydrated solid is in the inventive
  • Dry material so that it can not fall into the space of hot air distribution. Ensuring uniform distribution of air over the ground to reduce the consumption of hot air and to improve the quality of the dry material and the uniformity of drying. The speed with which the air flows through the columns of the support floor avoids that they pollute and much easier to win the dry matter and to keep the device clean of leftovers.
  • Fig. 1 shows schematically an inventive integrated filter-dryer device
  • FIG. 2 shows schematically a detail of Figure 1 in the state of filtration
  • FIG. 3 shows schematically a detail of Figure 1 in the state of solids removal
  • numeral 1 designates an integrated filter-dryer apparatus, in particular for continuous filtration and drying of a solid product in a fluidized bed, for example a precipitate or a crystal fraction from a reaction or other compound in wet form or a liquid or air stream with dispersed certain solids.
  • the device 1 consists of a filter unit 2 and a
  • Dryer unit 3 connected to the corresponding closed containers 4 and 5, with which a line 6 establishes the connection.
  • the container 4 of the filter unit 2 is arranged above the dryer unit 3.
  • the filter unit .2 consists of one or a plurality of
  • Filter elements 10 which are arranged in the interior of the container 4. Each filter element 10 consists of a filter means 11 for receiving the solids.
  • the filter elements 10 are provided for automatic accumulation and removal of the deposited solids. That means the Filter elements on the filter means 11 to absorb the solid and discharged automatically.
  • filter elements 10 in candle shape, tube shape, plate or disc shape, etc. have proven suitable.
  • the apparatus 1 further comprises circulation means 15 for producing a liquid flow for filtration inside the container 4, to guide this liquid flow through the filter elements 10 and to remove the filtrate from inside the container 4, and control means 16, to selectively start the formation of the deposits that form the filter cake and control the removal of the solids from the filter unit 2 into the dryer 3, as will be described below.
  • the container 4 is a pressure vessel and consists of a cylinder part 17 with a vertical axis and a funnel-shaped lower part 18.
  • a conduit 19 for the supply of the material to be treated is provided with a centrifugal pump 20 is connected and possibly a conduit 21 for the supply of a gas.
  • the upper part of the cylinder 17, however, is provided with a lid 22 and with one or more collecting tubes 23 for the removal of the filtrate and is preferably collected by parallel registers in one or more discharge tubes 24.
  • the filter elements 10 are filter cartridges, for example of the type FUNDABAC® 1 . Since these are well-known commercial products, we give below only a summary description.
  • the filter elements 10 extend vertically, hanging and substantially parallel and are arranged in register and connected to a manifold 23.
  • Each filter element 10 has a flexible and porous filter means 11, for example a fabric or a membrane of a plastic, for example of a polyamide,
  • the dryer unit 3 consists of a fluidized bed, which is essentially known and is therefore neither described in detail nor illustrated for the sake of simplicity. Generally speaking, the dryer unit 3 consists of a feeder 40 for feeding a
  • Fluid bed 41 with material to be dried (indicated schematically by dashed lines), a gas stream, for example, air having a flow rate that holds the material to be dried in suspension, a so-called fluidized bed, means for heating (not shown) to heat directly to the gas stream feed and / or the Trocknungsgut.
  • the heat energy required for drying can be supplied directly to the gas stream which heats the fluidized bed 41 or via a heat exchanger, for example a Rohbündel Stereophener which is adapted to the fluidized bed 41 and the material to be dried.
  • the container 5 is substantially cylindrical and cambered at its ends.
  • the fluidized bed 41 is arranged substantially horizontally in a lower part 42 of the container 5.
  • the supply device 40 consists of a fan 43 outside the container 5 and a distributor plate 44 for the gas flow, disposed below the fluidized bed 41.
  • a fastening 45 on the pipe 6 and a suction nozzle 46 for the discharge of the exhaust gas connected with one or more filters 47 (called and shown schematically for simplicity, for example, for manual or automatic cleaning), for the treatment of powdery, possibly coming from the fluidized bed 41 materials.
  • the lower end of the container 5 is provided with a discharge nozzle 48 with control elements 49 for controlling the emptying of the dried product from the container 5.
  • the device 1 further comprises a collecting space 50, which is formed for example in the pipe 6 between the filter unit 2 and the dryer unit 3: a shut-off valve 51 (slide) is disposed between the hopper 18 and the collecting space 50 and can be optionally opened to the From the filter elements 10 coming filter cake parts on the pipe 6 in the dryer 3 to leave.
  • a shut-off valve 51 (slide) is disposed between the hopper 18 and the collecting space 50 and can be optionally opened to the From the filter elements 10 coming filter cake parts on the pipe 6 in the dryer 3 to leave.
  • Another valve 52 is provided in the lower part of the plenum 50 which forms along the tube 6.
  • a solid material dividing means 53 to divide or crush the solid substances detached from the filter elements 10, before these solids in the Arrive dryer unit 3.
  • the control device 16 consists of a countercurrent known metering device 55 to a liquid, such as compressed air, an inert gas (nitrogen) or a washing liquid is supplied to the filter elements 10 and the filter means 11 in countercurrent to the filtration direction 2. It may be a circuit via a line 56 which is connected to the manifold 23 or may itself be used for circulating the filtrate, in which the filtration stream is reversed.
  • a line 56 which is connected to the manifold 23 or may itself be used for circulating the filtrate, in which the filtration stream is reversed.
  • various known methods can be used, of which, for example, mechanical or pneumatic means for shaking or vibrating the filter means 11 or a scratch or mechanical scraper destroys the filter surface, can be used.
  • the filter element 10 is further described.
  • a support body 29 may be flexible, porous, such as the one described by way of example or another known solid support body 29, for example made of different parts or another suitable porous material carried by a solid tubular support body 29 connected to the collection tube 23 and closed by a bottom 30.
  • Each support body 29 consists of a closed tubes 31 with projections or tabs 32, over which the support fabric 11 is stretched, and radial openings 33.
  • the support body 29 surround a central tube 34 which is connected to the manifold 23 and in a chamber 35, within the bottom 30, opens.
  • six open top and bottom closed tubes 36 are housed in the chamber 35, which are in contact with each other and symmetrically surrounding the central tube 34.
  • Figure 3 is shown schematically how the filter cake 14 is repelled from the filter surface 13.
  • the operation of the device 1 is as follows.
  • the liquid stream (turbidity) to be treated in the filter unit 2 is supplied by the means 15 for circulating the interior of the filter elements 10 Maintains negative pressure or a suction with respect to the pressurized container 4, which ensures a circulation of the liquid flow through the elements 11 and the support body 29 from the outside inwards and at the same time the filter means 11 are pressed from the outside inwards against the outer surface.
  • the solid in the liquid collects on the filter surface 13 in layers to form a filter cake 14 which adheres to the filter surface 13 and according to the concavo-convex profile of this filter surface 13 and the pressure difference between the two sides of the filter means 11 Filtrate stream, however, is maintained in the container 4.
  • a gas stream e.g. air or an inert gas
  • the same circulating means 15 may be used as for the liquid circulation during filtration or an additional line 57, as indicated by dashed lines, which is connected to the outlet port 21 and the metering device 55.
  • a pressurized gas stream eg, compressed air
  • metering device 55 When a first batch of material has been treated, a pressurized gas stream (eg, compressed air) is directed countercurrently into each filter element 10 via metering device 55.
  • the filter cake 14 is divided into fragments by the gas flow subjected to a certain pressure and dropped off the filter surface 13 of the filter element 10.
  • the compressed gas will successively reach the individual filter elements 10, so that they are discharged sequentially and thus blockages are avoided.
  • the repelled from the filter surface 13 material falls into the hopper 18 and from there via the pipe 6 and reaches the dryer unit 3, Considering that with the same material, the filtration is usually slower than drying, the collection chamber 50 and the valves ensured 51, 52 an optimized functioning of the device 1. In practice, it may happen that from the between the filter unit 2 and the Dryer unit 3 located collecting space 50, accumulated material is still retained by a batch in drying. On the other hand, two or more filter units 2 can be provided which operate in parallel with each other and in series with respect to the dryer unit 3.
  • the material coming from the filter unit 2 forms the fluidized bed 41 of the material to be dried.
  • the fluidized bed 41 is moved and at the same time provides the heat required for drying.
  • the gas stream is collected in the space of the suction 46, any dust-like parts are deposited in the filter 47, the solid is dried to a high dry content (over 92-95% by weight and finally to 99.9% by weight), over the Emptying nozzle 48 discharged, preferably on an automatic transport and hermetically sealed packaging system.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un dispositif destiné à filtrer et sécher une matière solide en suspension dans un liquide, comprenant une unité de filtration (2) et une unité de séchage (3). L'unité de filtration (2) est constituée d'un récipient fermé (4) comprenant au moins un élément de filtre en forme de bougie (10) destiné à recevoir la matière solide et est reliée à un récipient fermé (5) de l'unité de séchage (3), par l'intermédiaire d'un tube (6) destiné à assurer l'échange d'écoulement réciproque entre l'unité de filtration (2) et l'unité de séchage (3).
PCT/CH2006/000738 2006-12-27 2006-12-27 Filtre-sécheur WO2008077258A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CH2006/000738 WO2008077258A1 (fr) 2006-12-27 2006-12-27 Filtre-sécheur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2006/000738 WO2008077258A1 (fr) 2006-12-27 2006-12-27 Filtre-sécheur

Publications (1)

Publication Number Publication Date
WO2008077258A1 true WO2008077258A1 (fr) 2008-07-03

Family

ID=38353136

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2006/000738 WO2008077258A1 (fr) 2006-12-27 2006-12-27 Filtre-sécheur

Country Status (1)

Country Link
WO (1) WO2008077258A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108283832A (zh) * 2018-03-29 2018-07-17 苏州瑞之弘空气净化有限公司 一种环保的煤粉收集设备
CN108619775A (zh) * 2018-06-30 2018-10-09 贵州中伟资源循环产业发展有限公司 废旧锂电池中锂金属提取用锂盐反萃液过滤烘干设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6159360A (en) * 1996-11-22 2000-12-12 Heinkel Industriezentrifugen Gmbh & Co. Invertible filter centrifuge including a solids drier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6159360A (en) * 1996-11-22 2000-12-12 Heinkel Industriezentrifugen Gmbh & Co. Invertible filter centrifuge including a solids drier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108283832A (zh) * 2018-03-29 2018-07-17 苏州瑞之弘空气净化有限公司 一种环保的煤粉收集设备
CN108619775A (zh) * 2018-06-30 2018-10-09 贵州中伟资源循环产业发展有限公司 废旧锂电池中锂金属提取用锂盐反萃液过滤烘干设备

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