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Abbad Cheik

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Emission Monitoring & Reporting
Abbad Cheik

Abbad Cheik

Middle East & Africa Manager, DURAG Group

Abbad was born in Mauritania in 1975. He was awarded a scholarship from German government to study mechanical engineering at Cologne University of Science. Later on he studied also MBA at University of East London.

He joined DURAG GROUP in 2012. In his current position as General Manager of DURAG Middle East office in Dubai, he is responsible for the technical & sales support of DURAG’s customers and partners in the whole region. He has vast experience in Combustion Technology and Environmental Monitoring.

Advantages and Limitations of Differential Pressure and Ultrasonic Stack Flow Monitoring

Emission Monitoring & Reporting

Abstract: Flow measurement is one of the basic tasks In the scope of emission systems and process control.

It is used for instance for the calculation of the pollutant mass flow for reporting to the environmental authority.

There are different methods available in the market for flow monitoring. Each of them has its own proper Application. Our basic interest is to present systems specially designed for flow measurements in stacks. These systems have to meet several constraints:

high accuracy
no influence on the gas flow
no energy loss of the gas stream
Resistant against very aggressive gases
measurement of the whole flow profile
temperature and absolute pressure compensation
measurement of gases with high dust load
long life
long maintenance intervals
small maintenance expense
easy to install

Regarding these aspects, the following two measurement principles will be discussed in depth:
– differential pressure measurement
– ultrasonic pulse differential method

The differential pressure system measures flow rate in dry emissions with a probe using the differential pressure principle. It is derived from the difference between the total impact pressure and the reference pressure on the differential pressure bar

The monitoring system ultrasonic can both transmit and receive acoustic signals. These transducers are installed in a stack such that the velocity of the acoustic signal is influenced by the gas flow.

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