CO2 Recovery Plants

CO2 Recovery and Fermentor Section CO2 from the fermenters travel through the foam trap where the foam is removed from the Feed gas CO2. The feed gas CO2 is then fed to the Low Pressure (LP)CO2 Scrubber where it is scrubbed by counterflow of water to remove all water-soluble impurities like aldehydes, ketones, and alcohol from the feed gas. Post LP Scrubber, the feed gas is then fed to the blower which is used to boost up the pressure of the feed gas from the fermenters to feed to the suction of the Compressor at a desired pressure. The Blower will be equipped with VFD to operate as per the incoming pressure of the feed gas. CO2 Compression & Purification Section: The Feed gas from the blower is fed to the CO2 has Receiver before the compressor and then distribute to various compressors where the feed gas is compressed to a pressure up to 20 kg/cm2. The compressor will be equipped with VFD to operate as per the incoming pressure of the feed gas. The compressed gas is then passed through High Pressure CO2 Gas Scrubber designed to perform with a high efficiency removal of water-soluble impurities due to use of water scrubbing through Structured Packing. After HP Scrubber, the CO2 is passed through Deodorizer towers to remove odorous impurities found in CO2 gas from fermentation including aerobic microorganisms and anaerobic strains. The Deodorizer towers are filled with Activated Carbon and regeneration of towers are done through steam. Post Deodorizer towers, the CO2 is passed through a precooler where the CO2 temperature is brough down further from ambient, to remove moisture condensates in the gas. Post Precooler, the CO2 gas is passed through Dual Drier towers where moisture is removed to the desired limit. CO2 Refrigeration & Liquefication Section: Dried CO2 is liquified at 20 Kg/Cm2 pressure at temperature of -23 Degrees Celsius by using NH3 as a refrigerant with multiple NH3 compressors, in the CO2 Liquefier section. The Liquified CO2 is then passed through NOx towers which uses molecular sieves to remove NO or NO2 compounds in the Liquid CO2. The purified LCO2 is then pumped to storage tanks for storage and then further distribution through mobile tankers. Dry Ice Section: Liquid food/beverage-grade CO2 is drawn from the storage tank into the dry ice press via abuffer bottle. The liquid CO2 is then injected into the dry ice press chamber and compressedusing hydraulic pressure, transforming it into solidified dry ice. During this process, a portionof the liquid CO2 may remain un-solidified and escape as vapor. These vapors can either bereleased into the atmosphere or recovered as liquid CO2 by compressing them using a CO2compressor. The press operates using a hydraulic system and PLC control, offering fullyautomatic or manual operation modes. The conversion ratio from Liquid CO2 to Dry ice is approx. 2.3-2.5 kg.