Coromandel Kakinada has a wet scrubbing system in place to ensure emissions meet prescribed standards, with online AAQ monitoring systems connected to the APPCB server and monthly fugitive emissions monitoring for SPM and Ammonia.
Here's a more detailed breakdown:
Purpose:
The wet scrubbing system at Coromandel Kakinada is designed to ensure that emissions generated from the plant processes meet the standards set by the Andhra Pradesh Pollution Control Board (APPCB).
Monitoring:
Three online AAQ (Ambient Air Quality) monitoring systems are in place and connected to the APPCB server.
Fugitive emissions monitoring is conducted monthly in the work zone environment for SPM (Suspended Particulate Matter) and Ammonia.
Stack Height:
The total height of the stack in C Train is 62 meters.
Emergency Power:
Two DG (Diesel Generator) sets (2x1000 KVA) are available for use in emergency situations, with the height of the DG stack above 15 meters.
Production Enhancement:
Coromandel Kakinada is planning to enhance production without increasing the peak daily production or pollution load, through process improvement and debottlenecking.
Water Management:
The plant is based on a Zero Liquid Discharge system, with industrial effluent reused in the process and domestic sewage treated through STP (Sewage Treatment Plant) for use in gardening.
Scrubber Upgrade:
The scrubbing system has been upgraded to meet standards at higher production levels, with two cyclones put into operation to meet additional loads.
Compliance:
Coromandel has well-established policies in accordance with statutory guidelines and relevant SEBI regulations, with a focus on safety, health, environment, and ethical standards.
Zero Liquid Discharge:
The plant is designed to operate on a zero liquid discharge system, meaning that all wastewater is either recycled or treated for reuse.
Effluent Generation:
The plant generates 653.5 KLD (Industrial Effluent- 565 KLD; Domestic Sewage 88.5 KLD) of effluent.
Wet scrubbing systems remove pollutants from gas streams by bringing the gas into contact with a scrubbing liquid, typically water, that absorbs or neutralizes the contaminants.
Here's a more detailed explanation:
Pollutant Removal:
Wet scrubbers work by passing contaminated gas through a liquid, which can be water or a water-based solution, to capture pollutants.
Absorption and Adhesion:
Gaseous pollutants dissolve into the scrubbing liquid, while particulate matter adheres to the liquid droplets.
Gas-Liquid Contact:
The gas and liquid are brought into contact through various methods, including spraying the liquid into the gas stream or bubbling the gas through the liquid.
Mist Eliminator:
To ensure a clean gas stream, a mist eliminator or entrainment separator is used to remove any remaining liquid droplets before the gas exits the scrubber.
Scrubbing Liquid Treatment:
The liquid containing the captured pollutants is collected and may require treatment before being discharged or reused.
Applications:
Wet scrubbers are used in various applications, including removing particulate matter, acidic gases, and other pollutants from industrial emissions.
Types of Wet Scrubbers:
Venturi Scrubbers: Use a venturi effect to accelerate the gas stream and improve gas-liquid contact.
Packed Bed Scrubbers: Use a packed bed of material to increase the surface area for gas-liquid contact.
Spray Towers: Use sprays of scrubbing liquid to contact the gas stream.
Impingement Plate Scrubbers: Force the emissions up a vertical chamber with water flowing down the sides of the chamber to trap sulfur particles.
Advantages:
Wet scrubbers can be effective at removing a wide range of contaminants, including particulates, chemical contaminants, and heavy metals.
Disadvantages:
Wet scrubbers can produce wastewater that needs to be treated, and they can also be energy-intensive.
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