10L-50L Explosion Proof Gas Scrubber for Laboratory Exhaust Absorption

1. High-vacuum ball mill connections ensure excellent airtightness

2. Effective prevention of absorbent backflow

3. High-efficiency water spray system with superior spray performance

4. Integrated glass packing for enhanced gas-liquid interaction

Operating Principle

Once the circulation pump is activated, absorption liquid is pumped from the round-bottom flask through the condensing line to the shower head, then sprays downward from the tower cap through the absorption tower and returns to the absorption tank. As it passes through the glass packing-filled tower, the liquid comes into full contact with the incoming gas, ensuring thorough mixing and efficient absorption. For high-temperature exhaust gas, a condenser must be connected to cool the absorption liquid. This system supports both active absorption (using nitrogen as a carrier gas) and vacuum-driven gas flow through the device.

Precautions

The scrubbing liquid must be selected based on the properties of the gas to be purified and its impurities: for acidic impurities, alkaline detergents (e.g., sodium hydroxide solution) are typically used; for alkaline impurities, acidic detergents (e.g., chromic acid lotion) are suitable; for neutral impurities, oxidizing detergents (e.g., potassium permanganate solution) can be employed. When choosing a detergent, two critical criteria must be met:

① The solute in the detergent must chemically react with the impurity gas, converting it into a precipitate or soluble substance, or the solvent must fully dissolve the impurity gas to achieve effective removal.

② The target gas (main gas) must have low solubility in the detergent and not be significantly absorbed by it. For example, when purifying chlorine gas containing hydrogen chloride, saturated brine is ideal: hydrogen chloride dissolves readily in the brine, while chlorine has low solubility. For carbon dioxide containing hydrogen chloride, concentrated sodium bicarbonate solution works well, as hydrogen chloride reacts fully with sodium bicarbonate, but carbon dioxide does not react with the solution and has low solubility. Using sodium carbonate solution is not advisable, as carbon dioxide will react with it to form sodium bicarbonate, resulting in unintended absorption of the target gas.