How much acidic water from the sulfur recovery unit needs to be sent to the acidic water stripping unit?
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I hadn’t noticed this issue before; I would appreciate it if someone with expertise could advise me on how much acidic water is produced by a sulfur plant of a certain scale, and what the levels of H2S and NH3 in that water are. O(∩_∩)O Thank you
This post was last edited by ylb913 on 2015-12-24 at 16:42. This can be calculated based on the composition of acidic gases: 1. The main source of water is hydrogen sulfide, which turns into water upon combustion; the molecular weight ratio is sulfur production/water = 32/18； 2. The combustion of hydrocarbons turns into water. 3. Ammonia in acidic gases burns to form water, but the ammonia in quench water is artificially added; under normal conditions its concentration does not exceed 1000 mg/l. 4. The water content in acidic gases and the gases exiting the quench tower depends on the saturated water content of the gases at different temperatures, as well as the amount of mist carried along with them. The water content in air is determined by the temperature and humidity of the local atmosphere. The water in the acidic gas obtained from wastewater stripping without side lines essentially becomes quench water.
Dude, could you just give me a rough estimate?
Our design for 20,000 tons of sulfur calls for approximately 1.5 t/h of quench water (design data when ammonia is not burned). 20,000 tons of sulfur; the production rate is 2.5 tons per hour. The amount of water produced is 2.5/32*18 = 1.4 kg/h. For 1,000 cubic meters of aminoacid-containing gas with 40% water content, the rate is 400/22.4*18=0.3 kg/h.
Got it, so it’s roughly 1.5 + 1.4 + 0.3 = 3.2 t/h, right? By the way, are there any data on ammonia combustion?
This post was last edited by ylb913 on 2015-12-24 at 19:18. 1. It’s wrong; it’s actually 1.5 plus 0.3, which equals around 1.8. 2. Under the operating temperature conditions of the sulfur production furnace in the sulfur plant, the reaction of ammonia combustion results in the formation of nitrogen, and its conversion rate must be extremely high. NH3 + 0.75O2 = 0.5N2 + 1.5H2O2. 3. However, the temperature at the front part of the furnace must be above 1250 degrees (the traditional requirement is above 1300 degrees, or even 1380 degrees) ； This refers to the need to adapt to the requirements of a operating cycle; currently, these cycles last 3 to 4 years, with 4 years being the typical value in theory. The temperature in the sulfur combustion furnace generally should not exceed 1400 degrees, and this is a requirement imposed by the lining materials, as very high conversion rates are needed.
Why give up the 1.4t one?
Look carefully at what he said: 1.5 refers to hydrogen sulfide, 0.3 refers to ammonia. The value 1.4 is there to show how 1.5 was calculated – 1.4 is simply a margin added to get 1.5.
I’m not yet familiar with sulfur recovery; I’ll ask you again after taking another look
This is mainly related to the nature of the raw materials processed by the company