Isokinetic Sampling for SPM Sampling in Chimney Flue Gas

Isokinetic sampling is used for sampling of the flue gas in a chimney for SPM (Suspended Particulate Matter) measurement. It is a widely used method for the measurement of particulate matter emissions from stationary sources.

Working Principle:

The principle of isokinetic sampling is based on the concept of maintaining the velocity of the sampled gas constant. This is done to ensure that the particles in the sampled gas are captured accurately and representatively. The sampling rate is adjusted to match the velocity of the gas in the chimney, which is determined by measuring the gas velocity using a pitot tube or other velocity measurement device.

Procedure:

The isokinetic sampling procedure involves the following steps:

1. Determination of the gas velocity in the chimney using a pitot tube or other velocity measurement device.

2. Selection of the sampling location in the chimney based on the gas velocity.

3. Adjustment of the sampling rate to match the gas velocity.

4. Collection of the sample in a filter holder.

5. Weighing the filter before and after sampling to determine the concentration of SPM in the flue gas.

Advantages:

Isokinetic sampling has several advantages, including:

1. It ensures accurate and representative sampling of flue gas.

2. It is widely accepted and recognized as a standard method for particulate matter sampling.

3. It can be used for a wide range of particulate matter concentrations.

4. It is a cost-effective method for particulate matter measurement.

Conclusion:

Isokinetic sampling is a reliable and accurate method for sampling of the flue gas in a chimney for SPM measurement. It is widely used in the industry and is recognized as a standard method for particulate matter sampling.

Chemistry of spm
isokintic sampling