Two distinct features of the Profiflux IFS 5000 make Krohne’s magmeter a popular choice for the dosing of chemical solutions: Firstly, it’s Krohne’s most accurate electromagnetic flowmeter; secondly, the device exhibits notable chemical and abrasion resistance.
The instrument features a high density fused - aluminium oxide (Al2O3) ceramic flow tube and platinum electrodes, offering long-term stability. This combination ensures chemical corrosion, abrasion - and resistance to harsh, reactive substances, such as ClO2 and FeCl3 solutions, high concentrations of acids, suspensions and slurries up to TiO2 and ZrO2 hydrochloric acid and caustic and even to hydrofluoric acid. The hardness of the ceramic of the flow tube ensures that it maintains its dimensions, remaining accurate and stable - even under severe pressure variations.
Dosing processes
For a precise volumetric ratio of water or sewage water and an additive, both flow rates need to be accurately measured. The flow rate of the main stream is usually measured with ALTOFLUX IFS 4000. The flow rate of the additive solution, very small compared to the main stream, must be kept strictly proportional to the main stream flow rate.
Traditionally, the flow rate of an additive solution is controlled by regulating the speed of a diaphragm pump. The pumps were chosen because of their wide span of flow adjustment by controlling the speed and stroke length. These days, much higher demands are set on accuracy, beyond the pump capabilities, following the ecological and economical requirements set for these processes - the Profiflux IFS 5000 offers the required accuracy. The special flow sensor design of the IFS 5000 streamlines the flow profile, for example when used for applications with pulsating flows causing asymmetric distortions. Most Krohne signal converters are able to measure pulsating flows up to 200 strokes per minute.
Two practical dosing examples where accurate flow metering has been used are disinfection and flocculation - to remove solids:
* Disinfecting potable water
A chlorine dioxide solution is dosed online to potable water after the usual purification treatment for disinfecting. In order to achieve a constant concentration of chlorine dioxide and consequently chlorine in the water, the dosing rate of chlorine dioxide needs to be strictly proportional to the flow rate of the water to be disinfected.
* Flocculation
Iron-chloride and aluminium sulphate are often used as a flocculate to increase the settling speed of solids (sludge) in sewage treatment or of carbonates in water purification. By means of precise volumetric dosing FeCl3 is mixed into the mainstream of water or sewage.
For more information: Gordon Duff, Krohne, 011 315 2685, [email protected]
Hygienic ultrasonic flow sensor ifm - South Africa
Flow Measurement & Control
The SU Puresonic Hygienic ultrasonic sensor from ifm detects flows of conductive and non-conductive media with high precision.
Read more...VEGA pressure instrumentation supports resilient water network management VEGA Controls SA
Pressure Measurement & Control Flow Measurement & Control
As rapid urbanisation and climate pressures strain water networks across Africa, accurate real-time pressure monitoring has become a strategic necessity. VEGA’s pressure instrumentation helps utilities reduce losses, protect infrastructure and meet sustainability targets.
Read more...Flow imaging microscopy for the early detection of harmful algal blooms Yokogawa South Africa
Flow Measurement & Control
Yokogawa’s advanced flow imaging microscopy technology, FlowCam is helping utilities move from reactive treatment to proactive prevention of harmful algal blooms in reservoirs, dams and freshwater sources.
Read more...Never waste a drop
Flow Measurement & Control
Manufacturers of pumps, valves and related equipment have an important role to play when systems for water are being designed or upgraded and should be included at every stage of a project to ensure that the work is carried out within the equipment’s capabilities.
Read more...Ultrasonic flow meters ifm - South Africa
Flow Measurement & Control
The ultrasonic flow meter of the SU series from ifm - South Africa monitors liquid media such as water, glycol solutions or industrial oils. It detects the three process categories volumetric flow quantity, consumed quantity and medium temperature.
Read more...How utilities identify water losses in Northern Europe
Flow Measurement & Control
Norwegian leak detection specialist, Ovarro outlines how municipalities are responding to hidden water loss using acoustic monitoring and analysis tools that provide early indications of developing leaks.
Read more...Senix sensors provide flood warnings Instrotech
Flow Measurement & Control
To create the world’s most sophisticated flood monitoring and forecasting system, the US State of Iowa’s Flood Centre (IFC) uses more than 200 Senix ToughSonic 30 and ToughSonic 50 ultrasonic sensors to measure water levels in streams across the state.
Read more...Mastering inline LNG flow monitoring
Flow Measurement & Control
[Sponsored] As global demand for cleaner, more flexible energy sources continues to rise, liquefied natural gas (LNG) stands at the forefront of the energy transition. Engineered for excellence in cryogenic environments, the Anton Paar L-Cor 8000 flowmeter redefines inline LNG flow monitoring.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version