Abstract Number: 1193 Working Group: Control and Mitigation
Abstract In India, small and medium scale industry has also ruined the environment in large scale where the air pollution control system not installed. Limekiln industry with a production capacity of 40 TPD has found a high range of dust and gas, emitted due to calcination process. The average dust concentration in the form of total suspended particulate matter (TSPM) is found to be high in the stack as 364-2033 mg/Nm3, and fourteen various organic gases with different concentration were found at the outlet of the stack. Portable gas analyser Fourier Transform Infrared Spectroscopy (FTIR) and portable dust monitoring kit used for dust (TSPM), and gases are monitoring both an inlet and outlet of the system. To reduce this highly concentrated dust and gaseous pollutants a wet scrubber (venturi scrubber) installed, all gases and dust treated in the venturi scrubber by water and Lime-water, and additional cyclone separator was used to separate gases from a liquid.
The gases and dust are sucked by the blower and then passed through the venturi scrubber where the water sprayed over the pollutants. The gases are then removed from the top of cyclone separator which is then released into the atmosphere through the induced draft fan, and treated liquid is collected in the recirculating tank for recycling. The gas flow rate passing through the venturi scrubber is 8732.34 m3/hr, and the liquid to gas (L/G) ratio is 0.74 L/m3. The gas velocity is 77.25 m/s at the throat corresponding to the gas flow rate of 8732.34 L/min, respectively. For the effective treatment by venturi scrubber, the ratio of L/G should between 0.4-0.9 (Hesketh and Mohan, 2012). Dust controlled with 89.5-99.1%, and 65%-100% reduction in gases was observed.