Treatment of exhaust gas from hydrochloric acid production
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During the production of hydrochloric acid, a large amount of HCl exhaust gas is generated; in humid weather, this leads to the formation of substantial amounts of acid mist that pollutes the environment. Apart from using absorption towers to capture this gas and sell it as a by-product, what other effective measures can be taken to minimize the formation of acid mist or prevent the emergence of HCl gas?
What is your absorption level? I don’t think so.
This situation should only occur when switching, right? If it’s just absorption, there’s basically no smoking at all
Do you have contact information? Let’s exchange ideas
WeChat ID. jp1498206390
It is more environmentally friendly to absorb the hydrochloric acid from flue gas with an alkali before releasing it.
Create a chlorine accident system with a vapor pipe channel.
In this way, salt buildup occurs rapidly in the tower during chlorine accidents, and it is easy to cause blockages in the tower’s packing.
The last edit to this post was made by swl on 2017-4-17 at 14:41. The original poster described in the post: “During the production of hydrochloric acid, a large amount of HCL exhaust gas is generated; when the weather is humid, significant amounts of acid mist are formed...” This is not normal! Hydrochloric acid production is a well-established process; normal production involves three stages of absorption, and the exhaust gas emitted should meet the required standards. The production situation reported by the poster needs to be analyzed from three aspects: 1. Has this condition always been like this, or has it only appeared recently? If this continues, it is necessary to consider whether there are defects in the original design; if it has only started happening recently, it is necessary to determine whether external operating conditions have changed Is it still a fault in the absorption system? 2. If there is a malfunction in the absorption system, it is necessary to further determine which stage of absorption is problematic and take appropriate measures accordingly ； 3. If external operating conditions change, corresponding measures must be taken based on those changes: adjusting the flow rate of the water used for absorption, adjusting the flow rate of the cooling water, and adjusting the production capacity for hydrochloric acid, among other things ；
It’s a very simple and mature technology; there must be a problem with the equipment or the process
Level 3 absorption can fully meet the emission standards; it is recommended to check the acid feeding temperature, the acid output concentration, and the hydrogen chloride cooling temperature. If the temperature of the water being absorbed is too high, hydrogen chloride will be released.