CA2377883A1

CA2377883A1 - Liquid-solid separator

Info

Publication number: CA2377883A1
Application number: CA002377883A
Authority: CA
Inventors: Bernard Lapointe
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-15
Filing date: 2002-03-15
Publication date: 2003-09-15

Abstract

La séparation de la fraction solide de celle liquide se fait par filtration.
Les procédés industriels de filtration sont habituellement en batch, c'est à dire non continu. Cela occasionne certains inconvénients puisque les pores du filtre finissent par boucher et réduire la capacité de filtration.

Notre système permet donc une filtration en continue efficace de solution comportant une fraction solide plus ou moins importante. L'efficacité provient premièrement du fait que le filtre est toujours propre, c'est-à-dire exempt de fines particules qui bouchent les pores, et deuxièmement de la succion générée par une pression négative à l'intérieur du rouleau perforé.

Notre système de filtration repose sur l'utilisation d'une membrane filtrante spécifique à
l'application et auto-nettoyante qui tourne autour d'un rouleau perforé, lequel est équipé
d'un dispositif de vacuum. Tandis que les lourdes particules solides se déposent au fond par gravité, les fines particules solides adhèrent à la surface de la membrane par succion pour ensuite être récupérés par râpage. La membrane est ensuite nettoyée par jet d'eau avant de retourner dans la solution à filtrer. The separation of the solid fraction from that of liquid is done by filtration.
The processes filtration manufacturers are usually in batch, ie no continued. it causes some disadvantages since the pores of the filter end up butcher and reduce the filtration capacity.

Our system therefore allows efficient continuous filtration of solution with a more or less large solid fraction. Efficiency comes first the fact that the filter is always clean, i.e. free of fine particles which clog pores, and secondly from the suction generated by a negative pressure inside from the roll perforated.

Our filtration system is based on the use of a filter membrane specific to application and self-cleaning which revolves around a perforated roller, which one is equipped a vacuum device. While the heavy solid particles get deposit to the bottom by gravity, fine solid particles adhere to the surface of the membrane by suction to then be recovered by grating. The membrane is then cleaned by water jet before returning to the solution to be filtered.

Description

e.

HISTORIQUE
Suite à une demande de faluminerie Alouette de Pointe-Noire à Sept-¿les, une visite a été
planifiée pour faire (étude d'un problème de graphite dans leur eau de coulée.
J'ai décidé de faire des essais avec mon équipement SKIMTEK, essais qui se sont avérés négatifs.
Peu de temps après; je leur ai demandé si ma compagnie pouvait entreprendre des recherches dans le but de trouver une solution à leur problème de graphite dans Peau de coulée.
Ma demande ayant reçu une réponse favorable pour trouver une solution, un banc d'essai a été effectué avec très peu de moyens. Par la suite, des ingénieurs de faluminerie Alouette sont venus à Trois-Rivières pour assister à une démonstration. La première démonstration a été un échec. Lors de la seconde démonstration, les résultats n'ont pas été
excellents, mais ils font été suffisamment pour intéresser les ingénieurs d'Alouette.
Un autre banc d'essai a été construit et il a été installé dans faluminerie à
Sept-¿les. I,es tests ont été positifs et, depuis ce moment, le filtre à bande fonctionne et leur personnel procède toujours à prendre des lectures de Peau filtrée. Ä ce jour, le test se poursuit et les résultats sont aussi positifs.
FONCTIONNEMENT
Principe de fonctionnement La filtration se fait par des membranes auto-nettoyantes (par jet d'eau et par succion) tournant sur des rouleaux. Cet équipement permet de filtrer des particules de 20 à 0,5 mïc.
Membrane filtrante La membrane filtrante (~), appuyée sur une toile-support (2), se déplace par le biais d'un rouleau (~ permettant à cette membrane de se déplacer sur un autre gros rouleau perforé
de petits trous (3) afin de faciliter le passage de Peau à travers le membrane (/ ) et le rouleau ('~).
Le rouleau perforé est êquipé d'un dispositif de vacuum (~ facilitant la récupération des solides sur la membrane. Un grattoir (~) est utilisé pour racler le rouleau (~
afin de le débarrasser des solides. ~ 20~
Ce procédé de nettoyage a pour but de diminuer efficacement l'usure de cette membrane qui est fragile. Celle-ci est aussi nettoyée par jet d'eau. ~7~
LAPOINTE TECHNOLOGIK INC.

J ~ v FILTRATION ET FONCTIONNEMENT
Entrée du liquide (~) Le liquide à filtrer remplit la cuve jusqu'à un niveau (/; il passe ensuite à
travers les membranes (~ ) et (~ et du rouleau (3) et sort par le centre ($).
Solides légers Les solides contenus dans le liquide à filtrer se sont collés sur la membrane ( j ) pour ensuite sortir de la cuve avec la membrane ( / ). Ces solides sont récupérés de la membrane (/) par un rouleau aspirateur (5j en passant par un grattoir (() et tombent dans un réservoir (utilisés à cet effet.
Solides lourds Lorsque le liquide à filtrer entre dans l'équipement par l'entrée du liquide (~ ), il se disperse dans toute la cuve et la gravité oblige les particules solides lour es à se décanter au fond de la cuve f(2). Le fond incliné (2~ de la cuve, en forme d'entonnoir ~(9) permet d'accumuler ces solides lourds au centre de la cuve f(~'.
Une vis sans fin ~~ sert à évacuer à l'extérieur de la cuve ~2) les solides lourds en les dirigeant vers une seconde vis sans fin (2~rpuis vers la sortie des solides ~() qui sont ensuite accumulés dans un réservoir à solides ~,~
Motorisation Un moteur électrique ~~ muni d'un réducteur de vitesse ~ est installé au bout d'un rouleau de traction (~) et a pour but de faire avancer les membranes (/) et (~
autour du rouleau à paroi perforée (3). La membrane qûi défile sur les rouleaux (~), (2~, (~~ et (~
entrains un rouleau aspirateur ($j ~i-est petto Mc?Ml3/Z,~NIL '?, ye~ar une douche a jet,~t eau (~>.,,.
La toile-support (2 ) Elle a pour but de faciliter le défilement de la membrane filtrante ( j ) en lui assurant une résistance à (étirement que cause la traction du rouleau (t,~ et une résistance à
la pression causée par le poids du liquide dans la cuve (/2) et sur le rouleau perforé (~).
Elle a pour but aussi d'empêcher que la membrane filtrante ( j ) ne se froisse pas sur les rouleaux.
Pour s'assurer que la membrane filtrante ( j ) et la toile-support (2), soient bien fixes, des velcros sont cousus au moyen d'un fil spécial sur la toile-su la membrane filtrante ( j ), partie B ~ ~. pp°~ (2~~ partie A ~9~, et sur ~rUINTE TECHNOLOGIK INC.

~,.A~~iINT~
~~°' 'T~~HN~~t3t~~K .~~
.~..~.~~f LISTE DE PIECES
ATO PIECES DESCRIPTION
1. MEMBRANNE e.

HISTORICAL
Following a request from Alouette faluminerie from Pointe-Noire to Sept-¿les, a visit was planned to do (study of a graphite problem in their pouring water.
I decided to test with my SKIMTEK equipment, tests that have been proven negative.
Shortly after; I asked them if my company could undertake of the research in order to find a solution to their graphite problem in Skin of casting.
My request having received a favorable response to find a solution, a bench test a been done with very little money. Subsequently, engineers from falouerie Alouette came to Trois-Rivières to attend a demonstration. The first one demonstration was a failure. During the second demonstration, the results were not excellent but they were enough to interest Alouette engineers.
Another test bench was built and it was installed in a faluminerie in Seven ¿les. I, es tests have been positive and since then the band filter has been working and their staff Always take readings of filtered water. To date, the test has continues and the results are also positive.
OPERATION
Principle of operation Filtration is done by self-cleaning membranes (by water jet and by suction) turning on rollers. This equipment filters particles from 20 to 0.5 mïc.
Filter membrane The filter membrane (~), supported on a support fabric (2), moves by through a roller (~ allowing this membrane to move on another big one perforated roller small holes (3) to facilitate the passage of water through the membrane (/) and the roller (~).
The perforated roller is equipped with a vacuum device (~ facilitating the recovery of solids on the membrane. A scraper (~) is used to scrape the roller (~
in order to get rid of solids. ~ 20 ~
The purpose of this cleaning process is to effectively reduce the wear of this membrane which is fragile. It is also cleaned with a water jet. ~ 7 ~
LAPOINTE TECHNOLOGIK INC.

J ~ v FILTRATION AND OPERATION
Liquid inlet (~) The liquid to be filtered fills the tank to a level (/; it then changes to through membranes (~) and (~ and roll (3) and exits through the center ($).
Light solids The solids in the liquid to be filtered are stuck on the membrane (j) for then exit the tank with the membrane (/). These solids are recovered of the membrane (/) by a vacuum roller (5d via a scraper (() and fall in a tank (used for this purpose.
Heavy solids When the liquid to be filtered enters the equipment through the liquid inlet (~), it is disperses throughout the tank and gravity forces heavy solid particles are to be decant at the bottom of tank f (2). The inclined bottom (2 ~ of the tank, shaped funnel ~ (9) accumulates these heavy solids in the center of the tank f (~ '.
A worm screw ~~ is used to evacuate outside the tank ~ 2) solids heavy in them directing towards a second worm (2 ~ then towards the solids outlet ~ () who are then accumulated in a solids tank ~, ~
Engines An electric motor ~~ fitted with a speed reducer ~ is installed at the end a traction roller (~) and aims to advance the membranes (/) and (~
around perforated wall roller (3). The membrane which runs on the rollers (~), (2 ~, (~~ and (~
go with a vacuum roller ($ j ~ i-est petto Mc? Ml3 / Z, ~ NIL '?, Ye ~ ar a jet shower, ~ t water (~>. ,,.
The support fabric (2) Its purpose is to facilitate the movement of the filter membrane (j) in assuring him a resistance to (stretching caused by the traction of the roller (t, ~ and a resistance to the pressure caused by the weight of the liquid in the tank (/ 2) and on the roller perforated (~).
It also aims to prevent the filter membrane (j) from creasing not on rolls.
To ensure that the filter membrane (j) and the support fabric (2) are well fixed, velcros are sewn using a special thread on the canvas-su the filter membrane (j), part B ~ ~. pp ° ~ (2 ~~ part A ~ 9 ~, and sure ~ rUINTE TECHNOLOGIK INC.

~ .A ~ ~~ Ihd ~~ ° '' T ~~ HN ~~ t3t ~~ K. ~~
. ~ .. ~. ~~ f LIST OF PARTS
ATO PIECES DESCRIPTION
1. MEMBRANNE

2. TOILE SUPPORT 2. SUPPORT CANVAS

3. ROULEAU FILTRE 3. FILTER ROLL

4. ROULEAU MOTEUR 4. MOTOR ROLLER

5. ROULEAU ASPIRATEUR GRATTOIR 5. SCRAPER VACUUM ROLLER

6. GRATTOIR
~_ ~i~~ à ~~.~e..L7!'EA~
8_ SORTIE EAU FILTRÉE
9. ENTRÉE LIQUIDE
l o. TROP-PLEIN
1 LPfJRTE-F?'INSPECTIf?~F
12. CUVE
13. ROULEAU DE DOUCIE
14. EAU DE LAVAGE
t~ pOg~~AU D~I~Tf2UI~ DE LA'EFAfrE
16. SORTIE EAU RETOUR LAVAGE
17. NIVEAU DANS LA CUVE
18. NIVEAU DANS LE ROULEAU
t~ ~~~ ~~,~~,~~~~ .
20_ BOUE
21. ROULEAU DE TENSION DE LA TOILE
22. RÉSERVOIR Ä BOUE
23~ iN
24_ VIS SANS FIN
25. VIS SANS FIN
26. SORTIE DE LA VIS SANS FIN
2~.. ~!vIQ'~EUR É
2$_ RÉDUCTEUR DE VITESSE
29. VELCROS PARTIE A
30. VELCROS PARTIE B
31. JOINT DE LA MEI~RANNE
32_ JOINT DE LA TOILE ~I1PPORT
33. ROD EN ACIER INOX
34. GRILLE DU ROULEAU FILTRE' NO 3 _ 3 i 6. SCRAPER
~ _ ~ i ~~ à ~~. ~ e..L7! 'EA ~
8_ FILTERED WATER OUTLET
9. LIQUID INPUT
l o. OVERFULL
1 LPfJRTE-F? 'INSPECTIf? ~ F
12. TANK
13. DOUCIE ROLL
14. WASHING WATER
t ~ pOg ~~ AU D ~ I ~ Tf2UI ~ DE LA'EFAfrE
16. WASH BACK WATER OUTLET
17. LEVEL IN THE TANK
18. LEVEL IN THE ROLL
t ~ ~~~ ~~, ~~, ~~~~.
20_ MUD
21. CANVAS TENSION ROLL
22. SLUDGE TANK
23 ~ iN
24_ ENDLESS SCREW
25. ENDLESS SCREW
26. EXIT OF THE SCREW
2 ~ .. ~! VIQ '~ EUR É
$ 2 _ SPEED REDUCER
29. VELCROS PART A
30. VELCROS PART B
31. MEI ~ RANNE JOINT
32_ CANVAS JOINT ~ I1PPORT
33. ROD IN STAINLESS STEEL
34. FILTER ROLLER GRID 'NO 3 _ 3 i

Claims

1. CLAIMS: Membrane on support canvas .cndot. The membrane is mounted on a very strong support canvas. This allows the membrane to resist the small water pressure and thus avoid wear. Also this allows him to stay tense in every way.
.cndot.

2. CLAIMS: FIXING OF THE MEMBRANE

.cndot. The membrane is attached to the canvas by Velcro on each side. The canvas has the velcro stitching and the membrane velcro felt. To join the 2 ends of the membranes, larger velcros ensure sealing.

3. CLAIMS: MOVING THE MEMBRANE

.cndot. To allow good and rapid filtration, the membrane must is always clean, then its speed of passage to the exposure of the place where it will be satirized either more or less accelerated. A sensor device of level is installed to allow the membrane to advance faster when the water level will increase in the tank. The dirtier the water, the more the membrane gets dirty quickly, so the water level in the tank will vary. The more my membrane gets dirty the faster it moves.

4. CLAIMS: DRAINING THE CANVAS

.cndot. A broom that is installed under the support canvas and which has more or less less rigid, will allow their contact with the canvas with water to come off of the canvas. The support fabric which is made of large woven threads form pores who retain water droplets. The bristles of the broom in contact with the canvas go into the pores and get the water out there.

5. CLAIMS: CLEANING THE MEMBRANE

.cndot. A vacuum roller is installed on the membrane and rotates at contact of the membrane. Being pressed with pressure, the vacuum roller has a grid which fully covers its surface.

.cndot. It has a nozzle that connects the center of its hollow axle to grids. The suction nozzle rubs on the grid inside the vacuum roller, this nozzle East welded to the hollow axle of the vacuum roller.
.cndot. A vacuum pump fitted with a filter, a vacuum tank and a debris tank are connected to the hollow axle of the vacuum roller.
.cndot. When the membrane circulates, the vacuum roller rotates.
.cndot. The grid of the vacuum roller in contact with the membrane sucks the solid which are stuck on the membrane and thus allow the solid to stick on the grid of the vacuum roller which is partly under vacuum.
.cndot. The solids stuck on the roller grid are removed by a teflon scraper which rests on the grid of the vacuum roller.

6. CLAIMS: WASHING SHOWER
.cndot. A washing shower is installed so as to diffuse a jet of water end and powerful, at a given and precise angle on the filter membrane, after the vacuum roller has done its cleaning job to the maximum.
.cndot. The goal of the shower is to finish the total cleaning of the membrane filter.

7. CLAIMS: SEALING OF THE MEMBRANE
.cndot. The membrane seal on the filter roll must be reliable.
.cndot. The membrane that runs on the filter roller is pressed over the entire surface of filter roller, surface which is wet in water.
.cndot. The membrane is in contact with the filter roller over more than 80% of its area including 100% of the surface which soaks in water.
.cndot. It is impossible for dirty water to pass through the sides of the membrane, being given that when the membrane comes out of the water, it is always in full contact of the roller before separating it for cleaning aisle.
.cndot. Joint of the ends of the membrane, a velcro which allows the union of ends of the membrane, and which allows sealing by having a seal superimposed.

8. CLAIMS: DIFFERENT LEVEL
.cndot. The level of the tank is higher than the level inside the roller filtered.
.cndot. This difference in level allows the circulation of water through of the membrane.
.cndot. The membrane surface that is exposed to dirty water is large and allows a sufficient filtration rate.
.cndot. The larger the surface exposed to dirty water, the more filtration and the flow is tall.
.cndot. The maximum level for maximum pressure is provided by an outlet large volume and also provided by an overflow.

9. CLAIMS: CHANGE OF MEMBRANE
.cndot. Two (2) rolls are required. The first is wound from the membrane new. The second will be used to wind the old membrane.
.cndot. The change of the membrane can be done without any problem, and this even when the filtration equipment is on.

.cndot. By the time the old membrane is removed, the new arises. (See the drawings for a better understanding) The rollers are provided with the crank to allow membrane changes.

10. CLAIMS: DECANTING AND DISPOSAL
.cndot. When dirty water enters the tank through a hose and its flow is spilled in a large space, large diameter solid particles will settle fairly quickly at the bottom of the funnel-shaped bottom tank, which has as the results of forming an accumulation of solids.
.cndot. The solids will then be removed by a worm screw system at two (2) faces as the drawing demonstrates.

11. CLAIMS: PROTECTION SYSTEM
.cndot. Fully pneumatic design, valves, motors, as well as the sensors.
.cndot. A: System for advancing the membrane .cndot. B: Pumping system for entering dirty water.
.cndot. C: Equipment shutdown system in the event of breakage.
.cndot. D: Valve system to close the water in the washing shower.
.cndot. E: Shutdown system in case of water spillage from the equipment.
.cndot. F: System which indicates that the membrane is no longer rotating.
.cndot. G: System which aligns the membrane automatically.

12: CLAIMS: FILLING THE EQUIPMENT
.cndot. To have a constant and continuous flow, a buffer tank at the bottom conical is required.
.cndot. The tank is fitted with a control dis-charge valve pneumatic, this which ensures a continuous flow and not too large for the filtration capacity of filtration equipment.

13: CLAIMS: HOLLOW AXLES
.cndot. Hollow axles that allow water to exit the filter roller and tank.

14: CLAIMS: VENTILATION
.cndot. Ventilation and exhaust system for gases which may occur in equipment during use.