Chlorine recovery

One of the methods for recovering chlorine from exhaust gases is to use compression and condensation techniques. First, the chlorine-containing exhaust gas is compressed to increase its pressure; then, a cooling system is used to condense the chlorine into a liquid state, which is subsequently stored or reused. The specific steps include: 1. Exhaust gas compression: Using a compressor to compress the chlorine in the exhaust gas to a certain pressure. 2. Cooling and liquefaction: The compressed, high-temperature chlorine gas is cooled using a cooler to cause it to liquefy. 3. Collection and storage of liquid chlorine: Liquid chlorine gas is collected and stored safely for reuse when needed. The equipment requirements generally include: compressors, coolers, gas-liquid separators, storage tanks, etc. Safety measures must also be taken into account, as chlorine is toxic and corrosive. It is recommended to contact a professional engineering company for detailed design and equipment selection to ensure the safe and efficient operation of the system. .

Sodium hypochlorite is combined with hydrochloric acid to produce chlorine, which is then recycled

This portion of chlorine isn’t valuable; the problem is that too much liquid alkali is consumed, resulting in high costs. When hyposodium is mixed with hydrochloric acid, sodium chloride is formed, which also represents a waste of alkali

This post was last edited by qqgd on 2025-1-2 09:53. If this chlorine is to be recovered, it is necessary to understand the composition, temperature, and pressure of the exhaust gases after the reaction; moreover, it is important to determine whether the components in these exhaust gases could have an adverse effect on the chlorine recovery process using the method chosen. If compression cooling is used, it is necessary to dehumidify the exhaust gases, as wet chlorine is much more corrosive than dry chlorine; therefore, the moisture content in chlorine is crucial when selecting the materials for equipment and related pipes and valves ； At the same time, it is necessary to check whether nitrogen trichloride is present in the exhaust gases or whether the conditions for its formation exist; this is very important for the safe operation of chlorine recovery processes ； Whether the recovery unit operates continuously or intermittently; if it operates intermittently, it is essential to carefully ensure the sealing and protection of the entire unit during the intervals between operations, in order to prevent water and other components that could affect chlorine recovery from leaking in ； The testing of the final exhaust gas containing recovered chlorine, as well as the issue of its safe discharge, must also be taken into consideration. In fact, the technology related to the cooling and compression devices for chlorine is highly mature, but you must consider the economic viability of the recovery systems as well as issues related to safe operation.

Is it meaningful to recover this amount of chlorine gas? Solutions should be sought from the perspective of the production process, rather than considering recycling and neutralization