Stack flow supervision

Flow Measurement & Control

November 2008 Flow Measurement & Control

Durag’s D-FL-100 measuring system continuously determines the flow velocity and the flow rate of exhaust gases. Alarm levels are pre-selectable permitting necessary interventions in the plant control system in order to comply with prescribed limits on emission values.

Measuring lengths range from 400 mm to more than 4 m

Operating on the principle of differential pressure the probe separates two chambers; flow in the duct causes a build-up of pressure. The differential pressure induced across the probe is proportional to the square of the gas speed.

The units are available in two types:

* The D-FL-100-I is designed for flow measuring without temperature and pressure compensation.

* The D-FL-100-II is suitable for flow measuring with temperature and pressure compensation.

The volume flow can be converted from operational to standard conditions by the microprocessor evaluation unit. For this purpose, two additional current inputs (0-20 mA) for a temperature probe and a pressure probe have been provided at the evaluation unit. If an emission evaluation computer is available, the evaluation unit is not required.

Special designs are available for use in aggressive exhaust gases. A hastelloy flow probe is recommended for heating power plants, chemical plants and in paper manufacturing. For operating temperatures of over 600°C an inconel flow probe is available.

Exhaust gas temperature over the exhaust gas dew point is up to +320°C and a backflow purging feature is available as an option.

For more information contact Jan Pretorius, OEN Enterprises, +27 (0)11 675 4447, [email protected], www.oenenterprises.co.za

Share this article:

Case History 197: Bad reboiler temperature control.
Michael Brown Control Engineering Editor's Choice Flow Measurement & Control
It is very important that reboiler temperature controls operate well in petrochemical refineries, or the product quality can really suffer. I was asked to check such a control in a refinery where they were having problems with one of these controls.

Read more...

Precision measurement for ultra-pure water systems
Anton Paar Flow Measurement & Control
[Sponsored] Ultra-pure water (UPW) is essential in industries where even minor contaminants can impact product quality and process integrity. Anton Paar’s L-Cor Coriolis mass flowmeters provide a highly accurate and hygienic solution by directly measuring the mass of the liquid using the Coriolis effect, ensuring a high level of cleanliness.

Read more...

Eliminating splashbacks, spills and early shutoffs in ultra high-flow fuelling
Flow Measurement & Control
Husky Corporation has unveiled the latest innovation in fuelling technology with its newly designed StreamShaper for ultra high-flow applications, which minimises early shutoffs and splashback spills.

Read more...

Radiometric density measurements
Mecosa Flow Measurement & Control
Radiometric density measurements are used wherever conventional measurement techniques fail. Successful applications can be found in a wide variety of industries, especially where harsh process environments and difficult measuring conditions prevail.

Read more...

Battery-powered magmeter
Flow Measurement & Control
The RWEM/D battery-powered electromagnetic flow meter from Royce Water Systems is ideal for water and wastewater systems located at remote sites.

Read more...

Precise process and maximum savings with VEGABAR
VEGA Controls SA Flow Measurement & Control
Accurate measurementsof differential pressure is crucial for safety, efficiency and optimising operational processes. For over 40 years, VEGA has supplied industry-leading pressure measurement solutions, establishing itself as a trusted expert with a proven track record in sensor technology.

Read more...

Innovative solutions for low flow dosing with high precision
Mecosa Flow Measurement & Control
n the food, pharma, and chemical manufacturing industries, precision and efficiency are of utmost importance. Bronkhorst High-Tech has developed a flexible solution that meets today’s requirements for highly accurate dosing, whether continuous, in ratio, or in batches.

Read more...

Flow Measurement & Control

Stack flow supervision

Further reading:

Published by Technews