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Perfect Pollucon Services

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Stack Emission Monitoring Procedure

Stack Emission monitoring procedure includes tasks of Measurement, testing, sampling and analysis. Onsite determination of physical parameters of flue gases such as temperature, flow and pressure also involved in Stack emission monitoring.

Air Quality is a major environmental responsibility for all manufacturing industries. Those industries can use air quality monitoring or stack monitoring to measure the degree of pollutants or contaminants present in the current exhaust air and take the required steps to reduce them.

All industries must have a sampling port built into their stack and a permanent sampling platform to ease the Stack Emission Monitoring Procedure for environmental consultants who perform monitoring of stack emission.

Stack Monitoring
Stack Monitoring

Read More about Stack Emission Monitoring

Stack Emission Monitoring Procedure

Selection of Sampling Site in Stack Emission Monitoring Procedure

The objective of sampling in the Stack Emission Monitoring Procedure is to determine the accurate degree of pollutants present in the air emitted from the stack. Laminar flow should be present in the stack to get accurate readings.

To select a representative sample sampling point should be at least eight stack diameter downstream and two-stack diameter upstream from any joint, bend, expansion and contraction.

Traverse Points

As per new Notifications, all stacks must have a sampling post and sampling platform. The location of traverse points will be decided by the pollution control board.

After previous criteria met, to determine the minimum traverse points required the first diameter of the stack is to be calculated in the case of a circular stack. Also, it should be far 3cm from the stack wall.

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Know more about how to select Traverse Point in stack monitoring

Stack Emission Monitoring Procedure Download files (PPT and PDF)

You can download Stack Emission Monitoring Procedure files from here:

Stack-Emission-Monitoring-Procedure-PPTDownload
Stack-Emission-Monitoring-Procedure-PDFDownload

Molecular Weight Determination

Molecular weight can be found by drawing a known amount of gas into a gas chromatograph or Orsat apparatus. Moisture should be found. Molecular weight can be calculated by knowing gas components.

The average molecular weight can be determined by using the below-mentioned formula:

M = ∑ (i=1)^n (xi Mi)

Stack Emission Monitoring procedure

X is the mole fraction and Mi is mole weight of each constituent in a mixture of a several constituent.

Velocity Determination

Once the Pitot tube is connected Dynamic and static pressure is found using a manometer. Also, the Temperature inside the duct is measured. The velocity of gas and amount of air can be found using the formula

Learn the Advantages of Stack Emission testing

You can also use our stack monitoring calculators to calculate the velocity of gases online.

Moisture Determination

Moisture can be determined by dry and wet bulb temperature and the referring to the psychometric chart. Also, the condenser method works well for almost all gas streams and comparatively easy to perform.

Condenser Method to determine Moisture in a Gas Dtream

In this process sample of the stack is extracted through a filter to remove particulate matter than through the condenser, collecting the condensate formed in the process and then it is measured.

Wet/Dry Method to Determine Moisture in Gas Stream

The equilibrium temperature attained by water which is vaporizing into a gas of constant composition and the constant dry bulb is called wet-bulb temperature. The amount of depression of wet bulb temperature below the dry bulb is the saturation degree of humidity of the gas. Hence, the moisture content of gas can be determined by using the wet and dry bulb method.

Sample Recovery

After the sample has cooled, brush down the dust on side of the nozzle into a thimble and replace it in a labelled container.

This blog is written by Perfect Pollucon Services. They offer Environmental services in India including Consultancy and Monitoring Services.

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4 thought on Stack Emission Monitoring Procedure

  1. FARHAD says:
    at

    Hi ,

    Basically we are a Environmental consultants based in UAE. We have some projects as Stack/Soil/Noise air monitoring in Saudi,Oman&Abudhabi with our clients.we are looking for a subcontract team to do this projects.
    We required your service team to do the work completion for different projects based in Middleast.if your company have interest with those projects please revert back soon.

    1. Perfect Pollucon Services says:
      at

      Thank you for your Inquiry but Unfortunately we don’t offer services outside India. 🙂

  2. Ebenezer Quadzie says:
    at

    Please can we team up for Environmental projects in Africa or West Africa?
    NEMAS Consult Limited has well equipped environmental monitoring equipment and qualified personnel’s to carry out any environmental projects

    1. Perfect Pollucon Services says:
      at

      Sure,
      You can call us on +91-9930180059 for more information.

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Stack Emission Monitoring Procedure