Tail gas absorption activated carbon heat storage
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Dear experts, I have a question: The activated carbon adsorption tower used for exhaust gas absorption has been in use for nearly 6 months. A few days ago, after the process was completed, it suddenly started to store heat on its own; no clear cause was found after conducting investigations. I would appreciate it if experts could offer some advice and help analyze the reasons.
Since the adsorption process is an exothermic process, if we consider the spontaneous heat storage phenomenon as described by you, it is necessary to take into account the sources of heat: first, heat storage during the adsorption process; second, incomplete desorption; third, incomplete drying. Monitor the temperature accumulation pattern and the temperature changes of other adjacent adsorbers. The inspection mainly focuses on analyzing this process route, including the control valves, instruments, and steam pipelines.
A technology that uses ultrasound to desorb activated carbon, which has been used to treat wastewater containing organic substances and heavy metal ions through filtration, once it reaches adsorption saturation; this is a technique for regenerating activated carbon. As ultrasonic high-frequency sound waves propagate through a medium, they generate intense mechanical vibrations. These waves radiate forward in an alternating pattern within the cleaning medium, causing the liquid to move and creating tens of thousands of tiny bubbles. The tiny bubbles in the liquid (cavitation nuclei) vibrate violently under the influence of the sound field. When the sound pressure reaches a certain level, the bubbles expand rapidly before suddenly collapsing. When these bubbles collapse, shock waves are generated, creating pressures of several thousand atmospheres in their vicinity; this destroys insoluble contaminants and forces them to break free from the carbon pores, dispersing them throughout the cleaning solution. In this way, the purification of the micro-porous structure of activated carbon as well as its surface is achieved, enabling the desorption and reactivation of the activated carbon. It enables low-energy in-situ dynamic regeneration; the regeneration cost is low, and there is no secondary pollution. The adsorption efficiency of the regenerated activated carbon is superior to that of new carbon, being 95–130% of the latter’s efficiency. The loss rate of activated carbon is less than 0.3% per regeneration, allowing for a long service life and recyclability, as well as low costs. Contact Engineer Duan via WeChat at 18171595827.