Raking plays a major role in transporting solids to the underflow discharge point and increasing the solids concentration in a thickener or clarifier. The main purpose of a thickener or clarifier is to separate solids from liquids. A thickener achieves this goal by stimulating the release of as much liquid as possible from solids in the underflow.
The feed well of the Hi-rate Thickener Contains a special Flocculation Chamber & the feed enters this Chamber a hollow Drive shaft. Creative High Rate Thickener can be used in variety of different applications – including Mining & minerals, Industries, chemical, Water recovery, Water treatment and waste water Industries.
High rates usually require a combination of a stronger thickener mechanism and a lifting device. The amount of material larger than 250 micron (+60 mesh) in the feed. This affects tank bottom slope, drive and strength of mechanism. ... High-rate thickeners produce the lowest density and yield stress (<20 Pa). The highest yield stress underflow ...
High rate thickener units are provided in sizes ranging from 5' to 250' in diameter, and can accommodate drive head torques of up to 4 million foot pounds. They are available in shaft or cage driven models. Shaft drive …
The evolution of Outokumpu's rake mechanism is a case in point. The original thickener mechanism consists of a central drive shaft, two long rake arms, and two …
The main components of a high-rate thickener are the overflow launders, the rake arms, and the discharge cone (Fig. 1). These components are linked to the process constraints. At overflow, the turbidity must not exceed a certain limit, as well as the rake torque and the pressure at the discharge cone, in addition to the bed level which must ...
Better slimes management. High-rate Thickeners are designed to provide roughly 12 times the throughput of conventional machines of similar size. The key features for high …
Both High Rate Thickeners (HRT & HRT-S) come with Reactorwell™ technology. Reactorwell™ is a new generation feedwell with high solids retention and mixing efficiency that eliminates feed short-circuiting. Reactorwell™ offers low shear for ideal floccule growth, even discharge symmetry as well as excellent feed preparation.
As the rakes are turned by the drive shaft they cause the concentrate that has settled onto the bottom of the thickener to be pulled into the discharge chamber at the centre of the thickener. This is called the CONE. It is from this cone that the thickener underflow is taken. During normal operations of the circuit, the thickener may be pulled ...
the thickener feed. Adjustable Dilution Ports Optimize flocculation and enhance settling rates. Heavy-duty Drive with Lift Ensures reliable, continued operation during high-torque conditions. Measurements Bed level and bed mass can be measured to help determine flocculant dose and underflow pumping rates for efficient and stable operation ...
Thickener PHOENIX/KISA Bucket Wheel Thickener under˜ow sent to a PHOENIX Press where the slurry is dewatered to 70-75% solids 4-10% Solids Filtrate Filtrate OR Thickener over˜ow water returns for use in wash plant (<200 PPM) The PHOENIX AltaFlo™ Thickener is a rake-less thickener that provides ultra high-rate
traction thickeners are an efficient, cost-effective design. Thickener tanks Tank options include in-ground, on-ground, anchor channel or elevated steel. Steel tanks are …
The spiral rake blade achieves an even residence time, as well as overall higher underflow density, as compared to a traditional rake arm. Longer time is better for thickening – up …
The Titan™ traction thickener processes very high throughputs in a single thickener and cost-effectively provides greater torque in large units. When sizing a high-rate thickener, one factor that limits the size and throughput in the unit is the available torque. This is particularly true with center-driven, high-rate thickeners.
The original thickener mechanism consists of a central drive shaft, two long rake arms, and two short rake arms, both with strut supports and tie rods "tying" the four arms together. The rake arms have scraper blades to move the material inwards, struts to give the arm vertical support, and tie rods to distribute the torque load evenly ...
PHOENIX HiFlo™ High Rate Thickeners clarify wash plant effluent water while thickening the slurry to 40-45% solids, greatly reducing the underflow slurry rate to the slurry pond. PHOENIX Thickeners use sedimentation technology to maximize the water recovery rate, providing clarified overflow water that can be recycled and reused in the ...
The DensaDeg Clarifier is a high-rate solids contact clarifier that combines optimized flocculation, internal and external solids recirculation, and tube settling in two conjoined vessels to maximize hydraulic loading and treatment efficiencies. The proprietary blend of energy input and high volume solids recirculation reduces the waste sludge ...
Table 5 shows the performance of a gloss paint thickened primarily with a high-shear effective NSAT to obtain good high-shear viscosity, and co-thickened with a low-shear effective NSAT for Stormer consistency. High-shear effective HASEs can also be the sole or primary thickener for some acrylic semi-gloss paints.
HIGH-RATE THICKENER. High-rate thickeners also have a smaller tank volume, so less volume is required for storing the product if the tank has to be emptied. Because of this, high-rate thickeners can start up and shut down faster than conventional thickeners. However, due to their smaller size, high-rate thickeners require faster settling rates.
Enviro-Clear - Manufacturer of clarifiers, thickeners, horizontal belt vacuum filters, pronto pressure filters, linear screens, and replacement drives. High capacity, high rate, and conventional thickeners / clarifiers provided for liquid solid separation for mining, chemical processing and industrial applications.
Shear Rate – the velocity gradient or the rate of change of velocity at which one layer passes over an adjacent layer is the shear rate, γ = dv/dx = [units = s-1] Viscosity – this is expressed mathematically as, η = shear stress/shear rate and is the measurement of the resistance to fl ow of a fl uid. Pascal.second
High-Density Thickeners are similar to High-Rate Thickener but include additional features to increase underflow density and liquid recovery. These features include higher side walls and a steeper …
Our High- Rate Thickeners are specially designed to recover water from the slurry for re -use. Thickeners are the future as due to water scarcity; it has become mandate for us to save water not only for capital saving but for our future generations to enjoy the benefits of it and keep the environmental stable.
The function of the High-Rate Thickener is to increase the density of a sludge stream. This is done by introducing the sludge into the settling tank and allowing the solids to settle. The clean water overflows for reuse or disposal. The settled solids are collected in the central cone of the decanter or clarifier and are disposed of as ...
Our main product offeringis Underflow cone the High Rate Thickener (HRT) which has several special features that provide advantages over conventional thickeners. We can also offer Conventional thickeners, High compression thickeners and clarifiers. The key advantages of a High Rate Thickener over a conventional thickener are as follows:
The PHOENIX AltaFlo™ Thickener is a rake-less thickener that provides ultra high-rate mixing, flocculation, and internal dilution followed by clarification and positive sludge collection and removal in a single tank. The Thickener's unique internal geometry, a deep sidewall and steep conical bottom provides underflow concentration comparable ...
Design can vary from typical high rate thickeners with shallow sloping floors and standard side walls to paste units with steep floor angles and extended side wall heights. SELECTING THE BEST THICKENER FOR YOUR SPECIFIC APPLICATION DELKOR is able to provide comprehensive client support services around the world. We can also …
High-rate thickeners operate under strict constraints and several disturbances. To control this process, a constrained model predictive control (MPC) is developed in this paper. For process identification, a historical data-driven methodology is used and a vector autoregressive with ex ogenous variables (VARX) model structure is …
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