WO1999067005A2 - Method and device for recuperating valuable substances and liquids from a suspension or mixture thereof - Google Patents
Method and device for recuperating valuable substances and liquids from a suspension or mixture thereof Download PDFInfo
- Publication number
- WO1999067005A2 WO1999067005A2 PCT/DE1999/001813 DE9901813W WO9967005A2 WO 1999067005 A2 WO1999067005 A2 WO 1999067005A2 DE 9901813 W DE9901813 W DE 9901813W WO 9967005 A2 WO9967005 A2 WO 9967005A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- ripening time
- tub
- filter belt
- suspension
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
- B01D33/722—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
Definitions
- the invention initially relates to a method according to the preamble of patent claim 1.
- FIG. 1 A conventional plant for paper production is shown in a partial view in FIG. 1. Press water and white water are mostly sent to a cleaning plant after passing through a material scavenger, and the smaller part is used for stock preparation.
- these waters can not be returned directly to the production process, but must be discharged into the sewage treatment plant, where they cause considerable effort during burst operation when changing types or must be stored in intermediate tanks in order to then flow from there to the sewage treatment plant and to ensure an even mode of action there.
- the object of the invention is a decisive improvement in the recovery of both the valuable materials in the water and the water itself and thus in particular the saving of water, valuable materials and energy and thus an improvement in the environmental balance both in the production plant itself and in the subsequent disposal.
- a previously preferred area of application of such processes is the thickening of thin sludges, ie the removal of liquid from thin sludges, so that a thick sludge discharge can then take place at the outlet of the corresponding device, the waste water / filtrate occurring during the course of the process being removed.
- a conveyor belt as a continuously rotating filter belt
- such a device is also usually used as a Denoted "band thickener”.
- the basic idea of the invention is therefore to apply this process, which has been introduced in the municipal or industrial area of sludge thickening for decades, for the first time to the production process of paper and cellulose production:
- the resulting water and the water to be treated with the recovery of the reusable materials are transferred to the circulating filter belt after a conditioning treatment with flocculation and flocculation aids, which thicken the reusable materials to a much higher concentration than they are present in the feed, and this through the appropriate selection of flocculation - and flocculation aids almost a hundred percent separation from water as a means of transport, so that these waters can be used for higher quality purposes than before.
- Anionic, cationic and non-ionic products can be used as flocculants and flocculants. Multi-stage flocculation or flocculant addition is possible or necessary.
- this innovation can thus be seen in the common tub, which integrates the individual structural units both statically-mechanically and functionally and summarizes their process flow.
- the basic tub construction for all essential functional components, especially the maturation chamber and the filter belt, also allows all connections to be made directly on the tub, e.g. through suitable nozzles or flanges, especially in the lower tub area or directly on the underside of the tub where these connections can be safely accommodated without additional space requirements and protected against external influences.
- the tub concept enables new solutions, particularly in the area of the ripening time chamber, be it that the entire ripening time chamber as a modular unit
- the maturing chamber is in turn formed from simple components such as guide or guide plates, which can then be easily mounted and held in their assigned tub section in various positions, for example, and, if necessary, also easily replaced.
- This concept makes maintenance and repair extremely easy, but in particular it is also possible to achieve the functional sequence of the process simply by re-orienting and / or exchanging suitable guide and guide plates by adapting the length of the ripening chamber length Conversion of the device according to the invention to various types
- Fig. 1 is a schematic representation of a paper machine according to the prior art
- Fig. 4 is a side view / sectional view of the device
- Fig. 5 is a bottom view of the device
- Fig. 6 is a front view of the device on the left in Fig. 4 end / maturation chamber of the device.
- the device TD shown in block form in FIGS. 2 and 3 is integrated into the process flow of the paper production in such a way that the process steps shown in flow chart form follow one another.
- the device TD according to the invention thus takes the place of the "substance catcher" in the prior art (FIG. 1).
- the use of flocculants significantly improves the quality of the water released.
- the cycle water can therefore not only be used for stock preparation, but also for cleaning purposes and also for feeding spray pipes instead of other process water.
- a discharge of water that can no longer be used, which is correspondingly highly polluted, into a cleaning plant or sewage treatment plant, as in the prior art, is dispensed with when using the device according to the invention.
- Recycled materials can be returned to the cycle immediately or are stored temporarily when the grade is changed and reused if necessary.
- the essential component of the TD device is a continuously circulating filter belt, which brings about the recovery of valuable materials from the water as "pressed material", meaning that the valuable materials take on the role of the thickened sludge in the sludge dewatering, the concentration and thus recyclability increases with the separated water, the latter itself being recognized as a valuable substance and, depending on its quality (ie, for example, for remaining valuable substances), can flow directly back into the production process or can also be used for cleaning purposes.
- the device shown in FIGS. 2-4 essentially consists of a trough 10 in which a filter belt 20 is held, which is functionally and spatially connected upstream of a maturing time chamber 30. Both the filter belt or the two
- Rollers as well as the facilities of the ripening time chamber, which will be explained further below, are attached to the inside of this tub 10, with preference a screwable or pluggable fastening is provided, which enables easy exchange or access for repair and / or maintenance purposes and also easy conversion.
- the tub is supported on the floor using stands 10A ... 1 OD.
- the underside 11 of the tub 10 has a vertical section 11C, which extends to just above the floor, so that a protected lower area is created below the tub 10, which according to the invention is preferably used as a connection area for supplying and discharging the functionally typical liquids or liquids. mixtures is used:
- the white water to be processed is fed via a pipeline 60 to the deepest area of the lowered section of the tub 10, which forms the ripening time chamber 30.
- a specific amount of a flocculant usually a polyelectrolyte, is added in a controllable amount to the white water via an inoculation flange 61 with a mixing ring 62, and this mixture is then added on the inlet side via a connecting flange 52 to the ripening time chamber.
- the ripening time chamber itself extends essentially over the entire width of the tub 10 and is divided in the illustrated embodiment with guide and guide plates 31, 32, 33 so that the optimum length of the ripening section for the respective white water consistency and the flocculant used in each case and thus the ripening time, whereby the flow conditions are also influenced (turbulence generator, flow funnel).
- These components can either be prefabricated as a module (by exchanging modules, the length of the ripening section can be specified differently), or the individual guide and guide wires can be fixed separately in different positions in the tub 10.
- the ripening time chamber 30 ends in the area of the filter belt 20, where an outlet lip 34 is formed. This is followed by further separation of valuable materials and
- connections 51 are provided at the apex of a funnel-shaped section 11 B of the tub 10.
- Carrying out the recycling of valuable materials for example, a waste cake is then dropped at the end of the device, for example onto a conveyor belt or also mobile containers, and can then be fed back in at a suitable point in the production process.
- the tub design also makes it possible in particular to reclaim the screen wash water back into the tub and to increase the degree of separation, which means that the system can be operated without additional make-up water even at low throughputs.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19827967A DE19827967A1 (en) | 1998-06-23 | 1998-06-23 | Recovery of potentially-valuable solids and liquids from their suspensions or mixtures |
DE19827967.1 | 1998-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999067005A2 true WO1999067005A2 (en) | 1999-12-29 |
WO1999067005A3 WO1999067005A3 (en) | 2000-02-03 |
Family
ID=7871757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001813 WO1999067005A2 (en) | 1998-06-23 | 1999-06-18 | Method and device for recuperating valuable substances and liquids from a suspension or mixture thereof |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE19827967A1 (en) |
WO (1) | WO1999067005A2 (en) |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2044214A (en) * | 1934-03-26 | 1936-06-16 | Coulter W Jones | Sulphur refining process |
US2529882A (en) * | 1946-12-06 | 1950-11-14 | Carl F Mittman | Hop strainer |
US3348682A (en) * | 1964-04-16 | 1967-10-24 | Metallgesellschaft Ag | Method and apparatus for operating a filter belt |
US3426908A (en) * | 1964-08-14 | 1969-02-11 | Eimco Corp | Horizontal vacuum filter |
DE2253478A1 (en) * | 1971-11-03 | 1973-05-10 | Otto Brauns | METHOD AND DEVICE FOR DRAINING SUSPENSIONS |
US4014736A (en) * | 1974-12-17 | 1977-03-29 | The Ontario Paper Company Limited | Process for treating a slurry of cellulosic material |
FR2439036A1 (en) * | 1978-10-19 | 1980-05-16 | Caviem | Clarifier for water contg. mineral wastes - has feed box mixing in flocculant and filtration tank with detachable filter |
GB2069858A (en) * | 1980-01-30 | 1981-09-03 | Kubota Ltd | Belt pressure filter |
EP0178271A1 (en) * | 1984-09-17 | 1986-04-16 | Sunds Defibrator Aktiebolag | Apparatus for liquid treatment of pulp |
EP0270103A1 (en) * | 1986-12-03 | 1988-06-08 | Mo Och Domsjö Aktiebolag | A method and apparatus for manufacturing filler-containing paper |
DE4020208A1 (en) * | 1989-07-03 | 1991-01-17 | Andritz Ag Maschf | METHOD AND DEVICE FOR TREATING A FIBROUS-LIQUID MIXTURE |
WO1994029523A1 (en) * | 1993-06-09 | 1994-12-22 | Ceca S.A. | Non-polluting process for increasing the wet strength of paper |
US5411669A (en) * | 1992-04-06 | 1995-05-02 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and apparatus for treating pre-concentrated solid-liquid mixture streams |
DE4437062A1 (en) * | 1993-11-12 | 1995-05-18 | Andritz Patentverwaltung | Method and apparatus for open-loop or closed-loop control of a solids-liquid separation process |
WO1999024371A1 (en) * | 1997-11-11 | 1999-05-20 | Gebr. Bellmer Gmbh & Co. Kg., Maschinenfabrik | Device for thickening liquids or sludges |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6025237B2 (en) * | 1982-02-01 | 1985-06-17 | 賢三 家古谷 | Contaminant treatment equipment and its treatment method |
AT401185B (en) * | 1994-10-14 | 1996-07-25 | Andritz Patentverwaltung | DEVICE FOR DRAINAGE AND OR OR WASHING SUSPENSIONS, ESPECIALLY FIBROUS SUSPENSIONS |
-
1998
- 1998-06-23 DE DE19827967A patent/DE19827967A1/en not_active Ceased
-
1999
- 1999-06-18 WO PCT/DE1999/001813 patent/WO1999067005A2/en not_active Application Discontinuation
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2044214A (en) * | 1934-03-26 | 1936-06-16 | Coulter W Jones | Sulphur refining process |
US2529882A (en) * | 1946-12-06 | 1950-11-14 | Carl F Mittman | Hop strainer |
US3348682A (en) * | 1964-04-16 | 1967-10-24 | Metallgesellschaft Ag | Method and apparatus for operating a filter belt |
US3426908A (en) * | 1964-08-14 | 1969-02-11 | Eimco Corp | Horizontal vacuum filter |
DE2253478A1 (en) * | 1971-11-03 | 1973-05-10 | Otto Brauns | METHOD AND DEVICE FOR DRAINING SUSPENSIONS |
US4014736A (en) * | 1974-12-17 | 1977-03-29 | The Ontario Paper Company Limited | Process for treating a slurry of cellulosic material |
FR2439036A1 (en) * | 1978-10-19 | 1980-05-16 | Caviem | Clarifier for water contg. mineral wastes - has feed box mixing in flocculant and filtration tank with detachable filter |
GB2069858A (en) * | 1980-01-30 | 1981-09-03 | Kubota Ltd | Belt pressure filter |
EP0178271A1 (en) * | 1984-09-17 | 1986-04-16 | Sunds Defibrator Aktiebolag | Apparatus for liquid treatment of pulp |
EP0270103A1 (en) * | 1986-12-03 | 1988-06-08 | Mo Och Domsjö Aktiebolag | A method and apparatus for manufacturing filler-containing paper |
DE4020208A1 (en) * | 1989-07-03 | 1991-01-17 | Andritz Ag Maschf | METHOD AND DEVICE FOR TREATING A FIBROUS-LIQUID MIXTURE |
US5411669A (en) * | 1992-04-06 | 1995-05-02 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and apparatus for treating pre-concentrated solid-liquid mixture streams |
WO1994029523A1 (en) * | 1993-06-09 | 1994-12-22 | Ceca S.A. | Non-polluting process for increasing the wet strength of paper |
DE4437062A1 (en) * | 1993-11-12 | 1995-05-18 | Andritz Patentverwaltung | Method and apparatus for open-loop or closed-loop control of a solids-liquid separation process |
WO1999024371A1 (en) * | 1997-11-11 | 1999-05-20 | Gebr. Bellmer Gmbh & Co. Kg., Maschinenfabrik | Device for thickening liquids or sludges |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 246 (M-253), 2. November 1983 (1983-11-02) & JP 58 132399 A (KENZOU KAKOYA;OTHERS: 01), 6. August 1983 (1983-08-06) * |
Also Published As
Publication number | Publication date |
---|---|
WO1999067005A3 (en) | 2000-02-03 |
DE19827967A1 (en) | 1999-12-30 |
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