FR2581559A1 - Apparatus for thickening a solid/liquid suspension - Google Patents
Apparatus for thickening a solid/liquid suspension Download PDFInfo
- Publication number
- FR2581559A1 FR2581559A1 FR8507026A FR8507026A FR2581559A1 FR 2581559 A1 FR2581559 A1 FR 2581559A1 FR 8507026 A FR8507026 A FR 8507026A FR 8507026 A FR8507026 A FR 8507026A FR 2581559 A1 FR2581559 A1 FR 2581559A1
- Authority
- FR
- France
- Prior art keywords
- grid
- bars
- suspension
- solid
- blades
- 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.)
- Granted
Links
- 239000006194 liquid suspension Substances 0.000 title claims abstract description 13
- 230000008719 thickening Effects 0.000 title claims abstract description 12
- 239000007787 solid Substances 0.000 title claims abstract 4
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 239000010802 sludge Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000007790 scraping Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920000867 polyelectrolyte Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- B01D29/01—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 flat filtering elements
- B01D29/03—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 flat filtering elements self-supporting
-
- 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
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/445—Bar screens
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
La présente invention concerne un appareil pour l'épaississement d'une suspension solide-liquide, applicable en particulier aux boues provenant des installations de traitement d'eau. The present invention relates to an apparatus for thickening a solid-liquid suspension, applicable in particular to sludge from water treatment plants.
Cet appareil est particulièrement destiné à etre utilisé dans les petites et moyennes installations de traitement d'eau, telles que les stations d'eaux résiduaires urbaines, de l'ordre de 1000 à 20.000 habitants-équivalents, dont les boues qui s'y forment sont évacuées sous forme liquide en vue de leur utilisation en épandage agricole. This device is particularly intended for use in small and medium-sized water treatment installations, such as urban waste water stations, of the order of 1000 to 20,000 inhabitants-equivalent, including the sludge that forms there. are discharged in liquid form for use in agricultural spreading.
L'épaississement maximal des boues est un facteur primordial de réduction des dépenses d'exploitation. L'invention permet d'obtenir, dans un temps très court, un important épaississement des boues et, dans tous les cas, le résidu obtenu reste d'une texture suffisamment pâteuse ou liquide pour permettre, par exemple, une facile redistribution sur les terres cultivées. Les coûts de transport des boues liquides sont donc très sensiblement diminués. Les boues épaisses restent, dans tous les cas, pompables. The maximum thickening of sludge is a primary factor in reducing operating costs. The invention makes it possible to obtain, in a very short time, a significant thickening of the sludge and, in all cases, the residue obtained remains of a sufficiently pasty or liquid texture to allow, for example, an easy redistribution on the lands. cultivated. The costs of transporting the liquid sludge are therefore very significantly reduced. In any case, thick sludge remains pumpable.
L'invention permet également d'effectuer un important et rapide épaississement des boues avant les appareils de déshydratation, et notamment les filtres à bandes presseuses, ce qui augmente leur capacité massique ou permet de les alimenter avec des boues très diluées contenant jusqu'à 2 à 4 grammes de matières sèches par litre, c' est-à-dire en soutirant et déshydratant directement les boues diluées du bassin biologique par exemple, sans être obligé de recourir à des appareils annexes, tels que silo à boue ou épaississeur-stockeur intermédiaire. The invention also makes it possible to carry out a significant and rapid thickening of the sludges before the dewatering apparatuses, and in particular the filters with pressing strips, which increases their mass capacity or makes it possible to supply them with very dilute sludges containing up to 2 at 4 grams of dry matter per liter, that is to say by directly withdrawing and dehydrating the diluted sludge from the biological basin for example, without being obliged to resort to additional devices, such as mud silo or intermediate thickener-store .
Des appareils tels qu'épaississeurs statiques ou tambours d'égouttage ont déjà été décrits, qui permettent l'épaississement d'une suspension solide-liquide. Devices such as static thickeners or drip drums have already been described, which allow the thickening of a solid-liquid suspension.
Cependant, ces appareils présentent certains inconvénients - Les épaississeurs statiques, constitués d'une cuve cylindro-conique,
avec ou sans racleur de boue sur le radier, sont des ouvrages d'un volume
déjà important et aux performances modestes : concentrations de soutirage
souvent faibles ; vitesses réduites de décantation pour de nombreuses
suspensions entra#nant la mise en place de volumes de stockage importants
avec les risques de fermentations dégageant des odeurs, que cela implique
pour des boues fortement organiques ; difficultés d'exploitation : sur
verses chargées, couches de boues non homogènes ..., en cas de non dé
shydratation ou d'évacuation irrégulière des boues liquides. However, these devices have certain drawbacks - Static thickeners, consisting of a cylindrical-conical tank,
with or without mud scraper on the raft, are works of a volume
already large and modest in performance: racking concentrations
often weak; reduced decantation rates for many
suspensions resulting in the establishment of large storage volumes
with the risks of fermentation giving off odors, which this implies
for highly organic sludge; operating difficulties: on
loaded deposits, non-homogeneous sludge layers ..., in the event of failure
dehydration or irregular evacuation of liquid sludge.
- Les tambours d'égouttage, constitués d'un cylindre tournant muni d'une
toile de filtration permettent un épaississement accéléré des boues mais
avec la nécessité d'un lavage continu du médium filtrant et le risque,
dû au fort malaxage, de briser les flocs pour les boues de faible résis
tance mécanique.- Drip drums, consisting of a rotating cylinder fitted with a
filter cloth allow accelerated thickening of sludge but
with the need for continuous washing of the filter medium and the risk,
due to the strong mixing, to break the flocs for the sludge of low resistance
mechanical tance.
La présente invention pallie ces inconvénients en permettant un épaississement poussé très rapide de la suspension solide-liquide, sans nécessité de lavage continu de l'appareil et sans mise en mouvement du médium filtrant. The present invention overcomes these drawbacks by allowing very rapid deep thickening of the solid-liquid suspension, without the need for continuous washing of the device and without setting in motion the filter medium.
L'invention permet également une alimentation continue et régulière de la suspension, qui peut être très diluée, jusqu'à 1 ou 2 g de matières sèches par litre, comme est continue et régulière la sortie des boues épaissies. Les débits massiques et hydrauliques peuvent être adaptés sans difficultés selon le rythme optimal d'extraction des boues de la station d'épuration. L'appareil peut fonctionner sans surveillance, hormis la préparation périodique éventuelle des réactifs et sans subir, en climat tempéré, l'influence des intempéries. The invention also allows a continuous and regular supply of the suspension, which can be very diluted, up to 1 or 2 g of dry matter per liter, as the outlet of the thickened sludge is continuous and regular. The mass and hydraulic flows can be adapted without difficulty according to the optimal rate of extraction of the sludge from the treatment plant. The device can operate without supervision, apart from the possible periodic preparation of reagents and without being subjected, in a temperate climate, to the influence of bad weather.
L'invention cons#teen un appareil pour l'épaississement d'une suspension solide-liquide par séparation d'une partie de la phase liquide de cette suspension solide-liquide, éventuellement préalablement floculée, caractérisé en ce qu'il est constitué d'une grille plane fixe formée de barreaux parallèles entre eux, disposés dans le sens de circulation de la suspension solide-liquide à épaissir, cette grille étant munie d'un système de raclage se déplaçant en continu suivant une direction parallèle aux barreaux de façon à favoriser la progression de la suspension dans l'appareil et son évacuation hors de l'appareil, ce système de râclage présentant en outre l'intérêt d'éviter le colmatage de la grille et donc la nécessité de son lavage. The invention cons # teen an apparatus for thickening a solid-liquid suspension by separation of a part of the liquid phase from this solid-liquid suspension, optionally previously flocculated, characterized in that it consists of a fixed flat grid formed by bars parallel to each other, arranged in the direction of circulation of the solid-liquid suspension to be thickened, this grid being provided with a scraper system moving continuously in a direction parallel to the bars so as to favor the progression of the suspension in the device and its evacuation from the device, this scraping system further having the advantage of avoiding clogging of the grid and therefore the need for washing.
Suivant une disposition de l'invention, la grille plane, fixe, est horizontale ou inclinée. According to an arrangement of the invention, the flat, fixed grid is horizontal or inclined.
Suivant une disposition préférée de l'invention, les barreaux constituant la grille sont équidistants et rectilignes. According to a preferred arrangement of the invention, the bars constituting the grid are equidistant and rectilinear.
Conformément à une caractéristique de l'invention, le système de râclage est constitué par des lames souples, par exemple en caoutchouc, disposées perpendiculairement aux barreaux de la grille et de façon à affleurer ces barreaux. Ces lames sont portées, directement ou par l'in termédiaire de supports, par des moyens, tels que chaînes, sangles, courroies ou l'équivalent, passant sur des roues d'entrarnement animées d'un mouvement de rotation à vitesse variable. In accordance with a characteristic of the invention, the scraper system consists of flexible blades, for example of rubber, arranged perpendicularly to the bars of the grid and so as to be flush with these bars. These blades are carried, directly or by means of supports, by means, such as chains, straps, belts or the equivalent, passing over drive wheels driven by a rotational movement at variable speed.
Une ou plusieurs des lames du système de raclage peut également consister en une fine brosse de nettoyage des interstices de la grille. One or more of the blades of the scraping system can also consist of a fine brush for cleaning the interstices of the grid.
On a décrit ci-après, à titre d'exemple non limitatif, une forme de réalisation possible de l'invention, cette description étant faite en référence aux dessins annexés sur lesquels la Fig. 1 est une vue schématique de l'appareil en coupe longitudinale
et, la Fig. 2 est une vue en plan pardessus de cet appareil.A possible embodiment of the invention has been described below, by way of nonlimiting example, this description being made with reference to the appended drawings in which FIG. 1 is a schematic view of the device in longitudinal section
and, Fig. 2 is a top plan view of this apparatus.
L'appareil, tel que représenté aux Fig. 1 et 2, se compose d'une grille fixe, plane et rigide, métallique ou non, constituée de barreaux 1, de forme adaptée, disposés parallèlement dans le sens de la progression du flux de boues constitué par la suspension solide-liquide 2. The apparatus, as shown in Figs. 1 and 2, consists of a fixed, flat and rigid grid, metallic or not, made up of bars 1, of suitable shape, arranged parallel in the direction of progression of the flow of sludge constituted by the solid-liquid suspension 2.
Le système de raclage se compose d'une pluralité de lames racleuses souples 3 à bords rectilignes, reliées par des supports 3a à deux channes 4 passant sur des roues dentées 5 et Sa solidaires d'essieux 6 et 6a. L'essieu 6a est animé d'un mouvement de rotation à vitesse variable par un dispositif (non représenté) tel que moteur, réducteur et moto-variateur ou moteur à vitesse variable et réducteur, assurant ainsi la progression des lames racleuses selon une vitesse réglable.The scraping system consists of a plurality of flexible scraper blades 3 with straight edges, connected by supports 3a to two chains 4 passing over toothed wheels 5 and Sa integral with axles 6 and 6a. The axle 6a is driven in a variable speed rotation movement by a device (not shown) such as a motor, reduction gear and motor-variator or variable speed motor and reduction gear, thus ensuring the progression of the scraper blades according to an adjustable speed. .
Les lames 3 du système râcleur viennent ainsi frotter la surface de la grille sans pénétrer entre les barreaux de celle-ci. The blades 3 of the scraper system thus rub the surface of the grid without penetrating between the bars of the latter.
L'appareil suivant l'invention fonctionne de la façon suivante
La suspension solide-liquide 2, éventuellement préalablement floculée au moyen d'un polyéleetrolyte dans un dispositif tel qu'un dispositif statique à vortex, est amenée sur la grille fixe sur laquelle elle s'égoutte gravitairement. Les eaux d'égouttage sont recueillies par le collecteur 7. Le dispositif de raclage en marche continue évite l'accumulation de la suspension drainée et épaissie, sur la première partie de la grille et permet ainsi de décolmater continuellement le médium filtrant sans nécessiter de lavage. Il permet en outre la progression de la suspension en cours d'épaississement, puis épaissie, vers la sortie 8 de l'appareil. The apparatus according to the invention operates as follows
The solid-liquid suspension 2, optionally previously flocculated by means of a polyelectrolyte in a device such as a static vortex device, is brought to the fixed grid on which it drips by gravity. The draining water is collected by the collector 7. The scraper device in continuous operation prevents the accumulation of the drained and thickened suspension on the first part of the grid and thus makes it possible to continuously unclog the filter medium without requiring washing. . It also allows the suspension to progress during thickening, then thickened, towards outlet 8 of the device.
Claims (5)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8507026A FR2581559B1 (en) | 1985-05-09 | 1985-05-09 | APPARATUS FOR THE THICKENING OF A SOLID-LIQUID SUSPENSION |
| ES1986296783U ES296783Y (en) | 1985-05-09 | 1986-05-05 | APPARATUS FOR THICKENING OF A SOLID-LIQUID SUSPENSION |
| IT20343/86A IT1188670B (en) | 1985-05-09 | 1986-05-07 | APPARATUS FOR THICKENING A LIQUID SOLID SUSPENSION |
| JP61106522A JPS6230516A (en) | 1985-05-09 | 1986-05-09 | Apparatus for concentrating solid-liquid suspension |
| IN846/MAS/86A IN168367B (en) | 1985-05-09 | 1986-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8507026A FR2581559B1 (en) | 1985-05-09 | 1985-05-09 | APPARATUS FOR THE THICKENING OF A SOLID-LIQUID SUSPENSION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2581559A1 true FR2581559A1 (en) | 1986-11-14 |
| FR2581559B1 FR2581559B1 (en) | 1989-09-01 |
Family
ID=9319098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8507026A Expired FR2581559B1 (en) | 1985-05-09 | 1985-05-09 | APPARATUS FOR THE THICKENING OF A SOLID-LIQUID SUSPENSION |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS6230516A (en) |
| ES (1) | ES296783Y (en) |
| FR (1) | FR2581559B1 (en) |
| IN (1) | IN168367B (en) |
| IT (1) | IT1188670B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998014261A1 (en) * | 1996-10-03 | 1998-04-09 | Degremont | Improvements to an apparatus for thickening a solid-liquid suspension |
| CN107008036A (en) * | 2017-05-26 | 2017-08-04 | 宁波大学 | A kind of equipment for separating liquid from solid applied to Chemical Manufacture |
| CN111602539A (en) * | 2020-06-23 | 2020-09-01 | 湖北满园果生态农业有限公司 | Circular ecological planting system and method for orchard and fish |
| CN112657238A (en) * | 2020-12-04 | 2021-04-16 | 董捷 | Purification device of botanical acne-removing cosmetics |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617723A (en) * | 2014-10-29 | 2016-06-01 | 佛山高富中石油燃料沥青有限责任公司 | Oily sludge separation device of asphalt sewage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE28507C (en) * | G. TlDCOMBE JÜN. in Watfortl, Grafschaft Herts, England | Knot catcher for paper stuff | ||
| US3872006A (en) * | 1973-08-27 | 1975-03-18 | Abel Guenther | Apparatus for taking floating and solid materials out of channels |
| US3975275A (en) * | 1974-10-17 | 1976-08-17 | Shogo Kato | Conveyer for removing floating objects |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516765C3 (en) * | 1975-04-16 | 1985-12-05 | Mannesmann Rexroth GmbH, 8770 Lohr | Control valve for a vane pump |
| JPS5931618B2 (en) * | 1978-06-24 | 1984-08-03 | 三晃金属工業株式会社 | daylight roof |
-
1985
- 1985-05-09 FR FR8507026A patent/FR2581559B1/en not_active Expired
-
1986
- 1986-05-05 ES ES1986296783U patent/ES296783Y/en not_active Expired
- 1986-05-07 IT IT20343/86A patent/IT1188670B/en active
- 1986-05-09 JP JP61106522A patent/JPS6230516A/en active Pending
- 1986-10-28 IN IN846/MAS/86A patent/IN168367B/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE28507C (en) * | G. TlDCOMBE JÜN. in Watfortl, Grafschaft Herts, England | Knot catcher for paper stuff | ||
| US3872006A (en) * | 1973-08-27 | 1975-03-18 | Abel Guenther | Apparatus for taking floating and solid materials out of channels |
| US3975275A (en) * | 1974-10-17 | 1976-08-17 | Shogo Kato | Conveyer for removing floating objects |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998014261A1 (en) * | 1996-10-03 | 1998-04-09 | Degremont | Improvements to an apparatus for thickening a solid-liquid suspension |
| FR2754191A1 (en) * | 1996-10-03 | 1998-04-10 | Degremont | IMPROVEMENTS TO AN APPARATUS FOR THE THICKENING OF A SOLID-LIQUID SUSPENSION |
| US6264834B1 (en) * | 1996-10-03 | 2001-07-24 | Degremont | Sewage treatment plant for thickening a solid-liquid suspension |
| CN107008036A (en) * | 2017-05-26 | 2017-08-04 | 宁波大学 | A kind of equipment for separating liquid from solid applied to Chemical Manufacture |
| CN111602539A (en) * | 2020-06-23 | 2020-09-01 | 湖北满园果生态农业有限公司 | Circular ecological planting system and method for orchard and fish |
| CN112657238A (en) * | 2020-12-04 | 2021-04-16 | 董捷 | Purification device of botanical acne-removing cosmetics |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6230516A (en) | 1987-02-09 |
| IT8620343A0 (en) | 1986-05-07 |
| ES296783U (en) | 1988-04-01 |
| FR2581559B1 (en) | 1989-09-01 |
| ES296783Y (en) | 1988-11-16 |
| IN168367B (en) | 1991-03-23 |
| IT8620343A1 (en) | 1987-11-07 |
| IT1188670B (en) | 1988-01-20 |
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