Making liquid ammonia from ammonia water?
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Evaporate it into liquid ammonia using 20% ammonia solution? What’s the cost?
We use 18% ammonia solution; processing each ton of this ammonia requires approximately 500 kilograms of steam, with an electricity consumption of around 35 kWh per hour. The annual revenue is roughly 350,000 yuan
If a large amount of liquid ammonia is needed, it’s better to simply buy it directly and use it. Only in small quantities is it considered to use concentrated ammonia solution, which is then evaporated and compressed/coolled to become liquid ammonia.
Thank you for your answers. I was wondering if it’s cost-effective?
If there is a market demand for 20% ammonia solution in the local area, it is economically sensible to sell it directly in that form; only when there is an excess supply of 20% ammonia solution should consideration be given to converting it into liquid ammonia； If it is a user, preparing liquid ammonia using 20% ammonia solution is definitely less cost-effective than purchasing liquid ammonia directly.
Didn’t the costs on the second floor already be specified? Just add in labor costs, equipment depreciation, financial expenses, and selling expenses, and you’ll have the total.
How to handle ammonia water should be a matter of comprehensive consideration; for example, whether it is convenient to sell it directly and whether there is a market for it. Our company has a demand for liquid ammonia; it can be obtained through ammonia evaporation, and the residual liquid can be used as process water, which makes it suitable for small nitrogen fertilizer manufacturers. The situation in other industries is not clear.
Reply to 8# yg20080707: Whether it can be used directly in other sections depends on the composition of the dilute ammonia solution. For example, the excess dilute ammonia water from the carbon chemical section of small nitrogen fertilizer plants, or the residue remaining after ammonia evaporation from pressure-equilibrium ammonia recovery towers, can be used directly as make-up water for saturated hot water towers or as process water in gas generation jackets. Generally, no further cooling is required, as the temperature of the residual liquid at the ammonia vaporization stage is usually around 60°C; additional cooling offers little practical benefit. When used as process water in other sections, it is determined whether further heating is necessary based on the requirements of the section using it.