Gas emission from liquid caustic storage tank
Thread Content
Now, in accordance with the technical specifications for the prevention and control of waste gas pollution in the chemical industry in Jiangsu Province, liquid alkali storage tanks require waste gas treatment and cannot be vented directly. Therefore, such tanks need breather valves for air supply. However, the vapor phase of liquid alkali tends to crystallize, so do breather valves require frequent maintenance? How can this issue be addressed?
It’s to send you into the absorption tower; the breathing valve is also used for venting.
Breather valves cannot solve exhaust gas pollution
The breathing gas from alkali tanks does not pollute the atmosphere! When the moisture in liquid caustic soda evaporates, some alkali is released; this alkali reacts with carbon dioxide when it enters the atmosphere, thereby neutralizing it – in small amounts (otherwise it would constitute a carbon-reduction environmental measure).
It is necessary to consider the difference between the temperature of the liquid caustic in the tank and the ambient temperature. If the temperature difference is small, less steam is released from the tank, and the breather valve is clogged by crystals more slowly; in some cases, no crystals even appear in the breather valve. Conversely, it is necessary to rely on relevant on-site experience.
The drainage of liquid alkali also needs to be absorbed~~~ Is there any logic to that?
This is a bit weird. . . . . Is it because they think the air isn’t acidic enough right now? {:3_50:}
Have I interpreted the regulations too strictly? The Technical Specifications for the Control of Waste Gas Pollutants in Jiangsu Province’s chemical industry, as a local guideline, state that low-concentration acidic and alkaline waste gases should be treated through spray absorption. In that case, is there really anything that can be discharged directly?
I tend to ignore this point, unless environmental audits raise issues with it at that time; in that case, I’ll just give them a suggestion for modification{:3_57:}