NL1012717C2 - Mixer for flocking agent and sludge or effluent water, comprises variable speed rotor inside housing - Google Patents
Mixer for flocking agent and sludge or effluent water, comprises variable speed rotor inside housing Download PDFInfo
- Publication number
- NL1012717C2 NL1012717C2 NL1012717A NL1012717A NL1012717C2 NL 1012717 C2 NL1012717 C2 NL 1012717C2 NL 1012717 A NL1012717 A NL 1012717A NL 1012717 A NL1012717 A NL 1012717A NL 1012717 C2 NL1012717 C2 NL 1012717C2
- Authority
- NL
- Netherlands
- Prior art keywords
- sludge
- impeller
- housing
- variable speed
- rotor
- Prior art date
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 2
- 239000008394 flocculating agent Substances 0.000 title 1
- 229920000867 polyelectrolyte Polymers 0.000 claims abstract description 4
- 239000010801 sewage sludge Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002316 fumigant Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/60—Pump mixers, i.e. mixing within a pump
- B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Korte aanduiding: Inrichting voor zeer intensief mengen van zuiveringsslib met een polyelectrolyt om de ontwateringsmogelijkheden van het slib te bevorderenShort designation: Device for very intensive mixing of sewage sludge with a polyelectrolyte to promote the dewatering possibilities of the sludge
Voor waterzuiveringsbedrijven is slibontwatering een zeer belangrijk financieel aspect Deze 5 ontwatering kan bevorderd worden door het inmengen van viokmiddelen (poly-electrolyten) voordat het slib ontwaterd wordt in bijv. een centrifuge, kamerfilterpers of bandfihetpers. Het nadeel van deze viokmiddelen is dat ze sterk waterafstotend zijn.Sludge dewatering is a very important financial aspect for water purification companies. This dewatering can be promoted by mixing in fumigants (poly-electrolytes) before the sludge is dewatered in eg a centrifuge, chamber filter press or belt filter press. The disadvantage of these fly means is that they are highly water-repellent.
Centrifugaalpompen worden beschouwd als goede mengers vanwege de afschuifkrachten aan de 10 omtrek van de bladen van de pomp. Echter pompen zijn ontwikkeld voor transport van vloeistof niet om een menging te realiseren.Centrifugal pumps are considered good mixers because of the shear forces on the circumference of the pump blades. However, pumps are designed for fluid transportation not to realize mixing.
Klein Borculo heeft op basis van dit belangrijke neveneffect van de pomp, -de mengwerking, een intensiefinenger ontwikkeld, Polyslem geheten. De Polyslem bestaat uit een T-vormig huis (A) van IS minimaal dezelfde diameter als de slibtransportbuis. In het huis bevindt rich een as (D) waarop schoepen zijn aangebracht in de lengterichting van de as (de waaier (B)), zodanig dat het huis niet wordt geraakt.Based on this important side effect of the pump, the mixing action, Klein Borculo has developed an intensive mixer, called Polyslem. The Polyslem consists of a T-shaped housing (A) of IS at least the same diameter as the sludge transport tube. Inside the housing there is a shaft (D) on which blades are mounted in the longitudinal direction of the shaft (the impeller (B)), so that the housing is not touched.
De as (D) van de menger draait met een variabel toerental, afhankelijk van de viscositeit van poly-20 electrolyt oplossing, het droge-stof gehalte en volumestroom van het slib en de gewenste poly-electrolyt dosering.The shaft (D) of the mixer rotates at a variable speed, depending on the viscosity of poly-electrolyte solution, the dry matter content and volume flow of the sludge and the desired poly-electrolyte dosage.
Door deze constructie treden er zeer hoge afschuifkrachten op in de slibstroom welke door de Polyslem gepompt wordt, zonder dat de polyslem een belangrijke drukval veroorzaakt. In de praktijk 25 blijkt hiermee een aanzienlijke reductie van de hoeveelheid vlokmiddel gerealiseerd te kunnen worden en een hoger droge-stof gehalte in de filterkoek na het ontwateringsapparaat.Due to this construction, very high shear forces occur in the sludge flow which is pumped through the Polyslem, without the polyslem causing a significant pressure drop. In practice this proves to be able to realize a considerable reduction in the amount of flocculant and a higher dry matter content in the filter cake after the dewatering device.
De variabiliteit van het toerental kent het grote voordeel dat het optimale toerental voor vlokvorming gekozen kan worden omdat bij te grote afschuifkrachten de vlok weer stukgeslagen kan worden.The variability of the speed has the great advantage that the optimum speed for flocculation can be selected because the floc can be broken again if shear forces are too great.
30 De polyslem is in elk geval van wezenlijk belang voor slibontwatering maar kan evenzo nuttig toegepast worden in een afvalwaterbehandelingsinstallatie om zwevende of gesuspendeerde deeltjes te laten uitvlokken middels flotatie of middels sedimentatie.In any case, the polyslem is essential for sludge dewatering, but it can likewise be usefully applied in a wastewater treatment plant to flocculate floating or suspended particles by flotation or by sedimentation.
mi P717mi P717
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1012717A NL1012717C2 (en) | 1999-07-27 | 1999-07-27 | Mixer for flocking agent and sludge or effluent water, comprises variable speed rotor inside housing |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1012717 | 1999-07-27 | ||
| NL1012717A NL1012717C2 (en) | 1999-07-27 | 1999-07-27 | Mixer for flocking agent and sludge or effluent water, comprises variable speed rotor inside housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL1012717C2 true NL1012717C2 (en) | 2001-01-30 |
Family
ID=19769657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL1012717A NL1012717C2 (en) | 1999-07-27 | 1999-07-27 | Mixer for flocking agent and sludge or effluent water, comprises variable speed rotor inside housing |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL1012717C2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339206A (en) * | 1979-11-27 | 1982-07-13 | Kamyr Ab | Mixing apparatus for mixing a fluid fiber suspension with a treatment fluid suspension |
| US4675116A (en) * | 1984-07-26 | 1987-06-23 | Water Research Centre | Dewatering solids suspensions with controlled flocculant addition |
| US5242124A (en) * | 1991-07-23 | 1993-09-07 | Manfred Latzel | Apparatus for conveying, comminuting and mixing materials comprising/not comprising solid matter |
-
1999
- 1999-07-27 NL NL1012717A patent/NL1012717C2/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339206A (en) * | 1979-11-27 | 1982-07-13 | Kamyr Ab | Mixing apparatus for mixing a fluid fiber suspension with a treatment fluid suspension |
| US4675116A (en) * | 1984-07-26 | 1987-06-23 | Water Research Centre | Dewatering solids suspensions with controlled flocculant addition |
| US5242124A (en) * | 1991-07-23 | 1993-09-07 | Manfred Latzel | Apparatus for conveying, comminuting and mixing materials comprising/not comprising solid matter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PD2B | A search report has been drawn up | ||
| SD | Assignments of patents |
Owner name: REDES B.V. |
|
| VD1 | Lapsed due to non-payment of the annual fee |
Effective date: 20060201 |