What is the difference between a clarifier and thickener?
What is the difference between a clarifier and thickener?
Thickeners and clarifiers are both used to separate solids and liquid, but how do they differ? Simply put, Thickeners focus on the settled solids, and clarifiers focus on the clear overflow liquor — the name given to a solution free of suspended solids.
How do you size a thickener?
Factor of Safety: Normally a 25 per cent factor of safety is allowed in determining the thickener area size. Thus, in the above case, 8.87 (largest of three figures) plus 25 per cent factor of safety, equals 11.09 square feet area required per ton of dry solids fed to the thickener per 24 hours.
What is the purpose of a thickener?
A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics.
How does a thickening tank work?
Working of a Thickener Pulp is fed into the centre of the tank via a feed-well placed up to 1 m below the surface of the suspension. The clarified liquid overflows a trough, while the solids which settle at the bottom of the tank are withdrawn as a thickened pulp from an outlet at the centre.
What is the difference between settling tank and clarifier?
Sedimentation is the process by which suspended particles are removed from the water by means of gravity or separation. Sedimentation involves one or more basins, called “clarifiers.” Clarifiers are relatively large open tanks that are either circular or rectangular in shape.
What is thickening in mineral processing?
Thickening is a process where a slurry or solid-liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water (or liquor in leaching processes).
How do I control my thickener?
The control of the thickener must accommodate fluctuations in the process stream. This control is achieved by manipulating both the flocculant addition and the rate of underflow pumping. However fluctuations in ore type cause random changes in the required flocculant dosing.
What is Torque in thickener?
Torque is nothing more than a rotary force being applied from the rake arms to the drive shaft. It is the degree of torque that indicates to the operator the load that is in the thickener and when the rake arms have to be lifted.
Why are thickeners important in preparing sauces?
Thickeners are agents used to add body to dishes such as pie fillings, gravies, sauces, soups and puddings. Typically they are in a powder form. Starches are popular thickeners because they thicken without impacting the fat content or affecting the flavour (if properly used.)
What is thickener in mineral processing?
Thickeners are important and widely used for mineral processing to make concentrate from ROM (raw ore) . Specifically, thickeners are used to increase the solid content of concentrate slurry (concentrate + process water) so that we can effectively deliver the concentrated slurry and re-use the process water.
How does a thickener work mining?
A thickener is a machine that de-waters slurry, separating the liquid from the solids. The solids’ particle size range in thickeners is generally from 0.5 mm to a few microns. The finer the particle size, the slower settling and compaction rate. Feed enters the thickener near the center, below the water level.
How does a high rate thickener work?
How High-Rate Thickeners Work. High-Rate Thickeners separate liquids from solids using hindered settling. Rotating rake arms collect settled sludge and move it toward the center discharge cone. They use minimal amounts of polymers/chemicals to drop the solids, making High-Rate Thickeners environmentally friendly.
Why do you need a thickener in a clarifier?
A well designed thickener provides storage and equalization, and reduces the costs associated with de-watering. Thickeners are similar to other circular clarifiers in appearance and operation, but typically require higher operating torque and alternate sludge collection designs for optimal performance.
How long do MIP thickeners and clarifiers operate?
MIP Thickeners and Clarifiers are designed to operate continuously for 24 hours per day. Process selections are based on test work coupled with our vast experience in the field of thickening.
What is the purpose of a thickener paper?
Given recent developments in thickener design and modelling, this should not be the case. The purpose of this paper is to present a generalised understanding of the various inputs that combine in the design, control and operation of a modern thickener.
What are circular clarifiers and thickeners for Monroe environmental?
Monroe Environmental Circular Thickeners are a crucial step between upstream process clarifiers/separators and downstream de-watering and sludge conditioning processes. A well designed thickener provides storage and equalization, and reduces the costs associated with de-watering.