high rate thickener bed level detector

Improving thickener bed density by ultrasonic treatment ...

2014-12-10· It is found that when a moderate level of ultrasonic energy (2.01 W/L), which will not disperse the settled bed in thickener but enough to open the closed network structure, is delivered to the transition settling zone for 2.5 min, the bed density in a lab bench top thickener improves from 33.72 wt.% to 37.48 wt.%, which is an 11% improvement on bed density.

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Optimising thickener efficiency - Sustainability Matters

Depending on the application conditions, different techniques are employed to determine a thickener's bed level: Theoretical bed level based on the calculation of the average density of a constant height using a hydrostatic pressure sensor. Submerged ultrasound sludge blanket transducer to .

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Performance optimization of paste thickening

High levels of rake torque are required in modern thickeners due to design and operational improvements that allow increased underflow density targets. These torque levels can have catastrophic consequences, unless control and protection systems are in place. From process control point of view, it is important that monitoring of the rake torque is included in the control .

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Developing MudMax™ for Paste Thickener Bed-Level Measurement

BED LEVEL Bed level is a frequently installed instrument and can be installed and serviced during normal thickener operation. Instruments measure the height of the interface between thickened slurry at the bottom of the thickener and the clarified liquor at the top.

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Thickeners — Types, Working Principle & Applications | by ...

2018-08-08· In the 1980's, machines known as "high capacity" or "high rate" thickeners were introduced by various manufacturers. These machines are characterized by a reduction in unit area ...

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Thickener Interface Gauge (TIG) - Thermo Scientific ...

INTRODUCTION The Thickener Interface Gauge (TIG) provides continuous on-line measurement of the level of the liquid/solid interface in thickeners and counter-current decantation (CCD) washers. Unlike other interface level measurement systems the TIG also measures the span and positioning of the transition zone. The transition zone is the region between the clear liquid and the solids ...

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Flocculant control of thickeners enters new era - PDF Free ...

With the introduction of high rate/high capacity thickeners in the early 80s, Catoleum started development of the Autofloc control system to settle coal washery railings, based on a semi-empirical mathematical model for predicting the settling rate of coal and railings slurries. The Clarometer was based on a quite different principle, one of measuring the actual settling rate of a collected ...

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Ultra High Rate Thickeners – AltaFlo™ – PHOENIX Process ...

AltaFlo™ slurry thickeners are available in several sizes, general or seismic design, with options including local control panel, bed level sensor and pressure transmitter. For complete elimination of the slurry pond, a PHOENIX Belt Filter Press or Filter Press may be added downstream of the AltaFlo™ Thickener to dewater the thickened slurry.

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CHAPTER 3 SLUDGE THICKENING - Marmara Üniversitesi

A high sludge blanket will make the underflow solids concentration high due to high solids residence time. One problem with this approach is the gas formation due to the anaerobic activity. The gas formed will cause the flotation of the solids in the thickener. Chemicals like chlorine (CI 2) need to be added to inhibit the biological activity. A well operated thickener will have a solids ...

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Raking in gravity thickeners | Request PDF

It is found that when a moderate level of ultrasonic energy (2.01 W/L), which will not disperse the settled bed in thickener but enough to open the closed network structure, is delivered to the ...

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Optimise your thickener efficiency for maximum ...

The "'buoyancy based electromechanical system" uses a sensing weight which is lowered on a measuring tape into the thickener to detect the bed level. Typically, the sensing weight is a light, hollow container filled with the bed level material. When the container is lowered, it sinks in the water but 'floats' when it reaches the bed.

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Bed Level Detector – Royce Water Technologies, Australia

Bed Level Detector, Interface Level, Sludge Blanket Level Ultrasonic Sludge Blanket Monitoring System The ENV100 Ultrasonic Sludge Blanket Level Meter, utilises enhanced ultrasonic technology to measure the sludge interface level in various types of clarifiers, settling tanks and thickeners with superior accuracy.

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US4226714A - Thickener control system - Google Patents

The thickener controller adjusts the mass flow rate of the underflow in response to the influent mass flow signal. However, fluctuation of an interface level between clear and unclear areas of the thickener can effect flow rate adjustment. The purpose of such an override is correction for errors in the mass control signal as well as for changes in flocculant feed rate. This invention can be ...

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Paste thickener bed level measurement | Environmental XPRT

In the process of testing, both in the laboratory and in an actual operating thickener, it was found to provide data that goes well beyond just bed level detection. This instrument is capable of profiling density gradients within the bed. Some bed level instruments on the market can provide a vertical density profile in a thickener bed at one location. However, this instrument has the ability ...

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Mining Thickener Diagnostic Matrix - Hawk Measurement

flocculant dosing rate. For tailings thickeners water injection should be used to control high density tailings being pumped to tailing dams and filter presses. Compact bed level should be control- led at a specific height above the bottom of the thickener to optimize underflow density. When this occurs Do this Increase pump rate Increase floc dose Hold pump rate Hold floc dose Decrease pump ...

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Installation, Operation & Maintenance Manual

The high level sensor (LSH) must indicate the need for air. When all of these conditions are met, the system will operate in automatic mode. EQUALIZING THE RAD SYSTEM Before operating the DAF, the RAD System must be equalized.

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turbidity measurement in thickeners

SmartDiver The Smart Diver is a ruggedised mud diver that provides measurement of mud levels, settling zones and overflow clarity in thickeners, clarifiers, washers and decanters Tank profiling (suspended solids vs depth) is also provided, as it is specific gravity profiling and bed level measurement For more information call +61 3 9786 1711...

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Level measurement | Endress+Hauser

Vibronic point level detection offers safe overfill prevention in liquids and bulk solids. Liquiphant and Soliphant switches are the safe solution even under extreme process conditions. Capacitance level measurement Capacitance continuous level measurement and point level detection works in liquids and bulk solids. Liquicap, Liquipoint, Solicap and Minicap sensors are simple and cost-effective ...

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Optimise thickener efficiency for maximum profitability ...

The buoyancy based electromechanical system uses a sensing weight, which is lowered on a measuring tape into the thickener to detect the bed level. Typically, the sensing weight is a light, hollow container filled with the bed-level material. When the container is lowered, it sinks in the water but 'floats' when it reaches the bed.

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Clarometer liquid sampling system cuts flocculant usage - PACE

2010-05-31· Bed level monitoring A second product for these applications is the VBI (Virtual Bed Interface), a bed level monitoring system, which works on the diver principle. The VBI has a cable drum to raise and lower the high temperature probe, a separate control panel with operator touch screen and an independent cleaning station for automatic cleaning.

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Tailings Thickeners | Hawk Measurement Systems

Rake Torque from the scraper, also work on total load and are affected by density and therefore cannot be used to control bed level. The displacement float sticks and suffers from build-up. The Sonar Acoustic transmitter can be calibrated to work with two different densities. We can track the Compact Bed Level to control the underflow pump.

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Five Reasons for Measuring Density in Thickening Processes ...

2020-03-10· Inside the tank, submerged ultrasonic probes are used for tank profiling, interface detection and measuring the bed level. These instruments are helping operators to improve performances of the thickener. The readings of instruments can be used for automatic control of drives, pumps and for efficient dosing of flocculants.

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Optimising performance of bed level thickeners - PACE

2008-12-19· The combination of using the FMM50 for bed level monitoring and the Cerabar M for bed mass measurement, ensures reduced flocculant consumption, improved thickener efficiency, and lowers overall water wastage — all very important criteria of modern mining. Endress+Hauser Australia Pty Ltd John Immelman, Managing Director 1300 363 707

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thickener bedmass - holi-king

Bed Mass: Reporting the inventory of settled solids inside the thickener is done with a pressure transmitter that senses the rising bed mass. The sensor is fitted in the discharge cone and can control the underflow slurry pump speed to achieve a constant bed mass. The surface of any sensor in contact with the slurry medium must be resilient to abrasive particles and be cleaned regularly due to ...

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Improving thickener bed density by ultrasonic treatment ...

2014-12-10· It is found that when a moderate level of ultrasonic energy (2.01 W/L), which will not disperse the settled bed in thickener but enough to open the closed network structure, is delivered to the transition settling zone for 2.5 min, the bed density in a lab bench top thickener improves from 33.72 wt.% to 37.48 wt.%, which is an 11% improvement on bed density.

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level control system of conventional thickener « BINQ Mining

The Delkor High Rate Thickener is a proven performer in a variety of different applications. ... Flocculant dosing is controlled by means of a bed level detection device . Conventional, High Rate, High Density, Ultrasep and Paste Thickeners treat a variety of materials in a . »More detailed. Thickener Operations at Carajás Using a Fuzzy Logic Controller. System refinement .

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Studies on parameter estimation and model predictive ...

2015-04-01· In high rate thickeners, the rate of change of bed is of high importance and as such the bed level needs to be controlled. Betancourt et al. investigated the implementation of a nonlinear PI controller.

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Water Handbook - Clarification | SUEZ

A rise rate of 0.70-1.25 gpm/ft² of surface area is normal for clarification. Combination softening-clarification units may operate at up to 1.5 gpm/ft² of surface area due to particle size and densities of precipitated hardness.

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conventional thickener rake drive for sale

This thickener uses hydraulic drive, and core PLC auto-induction pressure sensor signal realizes hydraulic automatic rake lifting. Besides, configured automatic dosing system make it . Get Price. high quality ore hydraulic rake thickener machine. Rake Thickener Rake Thickener Suppliers and Manufacturers Tailings Processing Thickener top quality iron ore synthetic thickener for sale About .

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MudMax™ Bed-Level Monitoring System

MudMax™ uses advanced technology to deliver a first-of-its-kind bed-level monitoring system that provides 360-degree bed-level measurement inside thickeners and clarifiers. Multiple sensors located in the active bed-level area directly detect and accurately measure bed levels.

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