Can the exhaust gas treatment device for hydrochloric acid storage tanks and loading/unloading facilities be used together with the absorption device for chlorine waste gas treatment?
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Our company is a chlor-alkali manufacturer; in its daily operations, it uses chlorine-alkali absorption towers to treat chlorine gas emissions, as well as the acid mist generated during the storage of hydrochloric acid and its handling. Currently, some facilities use absorption devices for waste chlorine gas to handle both waste chlorine gas and hydrochloric acid mist together. Sir, is this okay? It is not specified in GB/T31856-2015. Thank you!
Although they are both exhaust gases absorbed using alkaline solutions, they cannot be absorbed together
The absorption of waste chlorine gas by alkaline solutions can produce sodium hypochlorite as a by-product. However, if hydrogen chloride is present and mixes in, it will hinder the absorption of waste chlorine gas, and sodium chloride will accumulate in the system. This not only affects the quality of the by-product but may also lead to the deposition of sodium chloride throughout the system, potentially causing environmental problems or other issues, especially during the absorption of waste chlorine gas
The side effects of alkali water absorption are quite significant, and secondary pollution is an even bigger problem!
I agree with you. In fact, water is sufficient for absorbing hydrochloric acid mist; it’s just necessary to regularly analyze the acidity of the water used for absorption to ensure that the absorption process is effective and reliable. When the acidity reaches a certain level (which can be determined through experimentation), it is sent to the wastewater treatment plant to participate in the wastewater treatment process
For hydrochloric acid exhaust gases, they are absorbed using water and alkaline solutions; chlorine exhaust gases are absorbed with alkalis. My brother used to work in the chlor-alkali industry as well.