How to deal with the odor of dichloroethane in the workshop
Thread Content
We produce pesticides, and our reaction vessels usually have a capacity of two to three thousand liters. Dichloroethane is one of our main raw materials. In the workshop, vacuum pumps are used to extract dichloroethane for much of the time, and the odor resulting from this is quite strong. The water supply to the vacuum pumps is kept running continuously, but the odor still remains intense. What can be done to address this issue? Are there any effective solutions?
The air in the workshop can be ventilated; of course, the best way to do this is to install a large fume hood outside the reaction vessel.
Our **Occupational Health Standards (GBZ 2-2002) “Occupational Exposure Limits for Hazardous Factors in the Workplace” specify the limit for dichloroethane. Prolonged low-level exposure causes neurasthenic syndrome and gastrointestinal symptoms. First, a fixed-point collection method is used to gather waste gases, which can then be purified through plasma catalysis. This is a relatively mature technology.
Those upstairs need data support; the results we’ve obtained are not very good.
Dichloroethane is quite toxic. The most effective approach is to improve airtightness; the simplest way to do this is to enhance ventilation, facilitate forced exhaust, and reduce pollutant concentrations
The **Occupational Health Standards (GBZ 2-2002) – Occupational Exposure Limits for Hazardous Factors in the Workplace** mentioned above have been revoked. The latest version is \"Occupational Exposure Limits for Hazardous Factors in the Workplace – Part 1: Chemical Hazardous Factors\" GBZ 2.1-2007; according to this standard, the PC-TWA for dichloroethane is 7 mg/m3, and the PC-STEL is 15 mg/m3. It is classified as a suspected human carcinogen. Therefore, it is necessary to address the issue of ventilation in the workshop as well as the sealing of any potential leakage points, in order to ensure the health of the workers there. A movable suction hood can be used; a hose connects this hood, which resembles a large funnel, to the main air duct. Such suction hoods are placed at potential leakage points, such as flanges, pumps, valves, and container openings. Of course, if the facilities are relatively fixed, it can also be designed as a fixed type. If personnel may be exposed to its vapors during operation, they should wear gas masks
The plasma method mentioned on the 3rd floor is quite effective for low concentrations, but its performance is not as good for higher concentrations. Personally, I think it is possible to transfer the exhaust gases from the gas phase to the liquid phase, which facilitates their recovery or other forms of treatment ； Of course, the pipelines need to be properly sealed during this process.
I’m not sure how much dichloroethane is lost in your case; if the amount is significant, it can be collected and recycled, but if it’s not much, it can simply be vented into the atmosphere!
Can dichloroethane be pumped using that vacuum pump? Change change change
Activated carbon fiber. . Adsorption. . Desorption. . Condensation recovery. . . The investment will be recouped in a year or two