Can plain water be used for ammonia absorption?

It can be absorbed using water; the ammonia gas is introduced into the ammonia absorption tank, with the ammonia pipeline inserted at the bottom of the tank and several small holes made in the pipeline. Once a certain concentration is reached, the gas is discharged, after which fresh water is added. The concentration on the outlet side of the ammonia absorption tank must be monitored continuously. The atmospheric-pressure outlet of the ammonia absorption tank should be equipped with a vent pipe that is at least 15 meters long

Thank you, so there’s no need to stir; just drilling is sufficient. The height of the vent must be adequate

The mixing effect is better; a pump can be used for circulation and absorption

Ammonia reacts very easily with water; it can be absorbed by plain water just fine, but absorption should be even better using slightly acidic water

In principle, it’s possible. In dilute ammonia solutions (for example, when the ammonia concentration is less than 6%), the gas-liquid equilibrium of ammonia obeys Henry’s law, meaning that there is a linear relationship between the partial pressure of ammonia in the gas phase and its concentration in the liquid phase. At room temperature, the relative volatility of ammonia is about 21 times that of water. The process of removing ammonia from the gas phase using water is called absorption, and the standard equipment for this purpose is an absorption tower. For other methods, those that use tanks, kettles, ponds, or water curtains (waterfalls) for absorption have relatively low efficiency. Mainly, it is due to the small contact area and high mass transfer resistance. If the air is not circulated using a fan, a membrane contactor will perform better as a substitute for an absorption tower. Advantages of membrane contactors: large specific surface area (requiring less floor space), no need to consider wind direction or speed, no impact from gravity, low water usage and circulation volume, extremely low power consumption; it is possible to obtain recycled high-purity ammonia water or recycled ammonium salts, with the resulting ammonia-rich solution being pure (free from dust, debris, oil droplets, and aerosols present in the air). The core of the device is a microporous hydrophobic hollow fiber membrane with a wall thickness of 0.05 mm, an inner diameter of 0.4 mm, a micropore diameter of ≤0.2 microns, and a porosity of 40–60%. Our company specializes in manufacturing such membranes and membrane components, as well as providing engineering design, installation, commissioning, and maintenance services. If you’re interested, we can give you a live demonstration, free of charge.

Thank you. I work in design as well. The client wants to reduce costs, and the production is intermittent with low volumes. Moreover, ammonia is used as a material for adjusting pH during production; therefore, for exhaust gas treatment I chose water absorption, by drilling holes in the pipes and adding agitators

Isn’t the venting of normal Class A and B liquids supposed to be at a height of 4 meters above the roof of the workshop? What is the basis for this design requirement of having such a height above the workshop?

If emissions are a concern, use a two-stage spraying system: a first-stage water washing spray and a second-stage acid washing spray

What acid is best for pickling? ?

For pickling, both sulfuric acid and *ao acid can be used