How to deal with ammonia gas
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Our company uses liquid ammonia as a template agent. After the reaction, a large amount of ammonia cannot be processed well. Due to the current high environmental protection requirements, the smell of ammonia cannot be smelled when it is discharged. In the past, a large amount of water was used for condensation and absorption, which could not be solved well. I hope someone can provide a better solution. Our company is considering using nitric acid absorption to make* I don’t know if the method of reusing ao acid and an is feasible! Thank you for your answer!
Using hydrochloric acid or sulfuric acid is stronger than nitric acid! How much does nitric acid cost? When condensed with water, ammonia is produced
Hydrochloric acid and sulfuric acid will add sulfide ions and chloride ions to make ammonia nitrate which can be reused1
Thank you, third floor. The exhaust gas is basically ammonia, the temperature is about 120 degrees Celsius, and the processing capacity is about 10 tons per hour! Currently, water is used for cooling and absorption, but the effect is not good!
High temperature, high concentration, high flow rate, unexpected. How to deal with the ammonia produced by water cooling and absorption? Is distillation used to produce high-purity ammonia, or is it further compressed into liquid ammonia? Does your application require liquid ammonia? What are the water content requirements for liquid ammonia? Is it possible to use high-pressure pure ammonia gas, or is it possible to use high-concentration ammonia water? If your factory has solved the problem of use or disposal of ammonia absorbed by cooling, and has not yet used indirect heat exchange cooling, adding a pre-cooling step is a solution that can be considered. ； However, it is the simplest and feasible to add a set of chemical absorption post-treatment steps. The sulfate in the absorption solution accumulates to a certain extent (20-40%), and the concentrated ammonia can be recovered by distillation after adding alkali. It just produces some sodium sulfate-containing wastewater or waste gypsum. If corrosiveness is a concern, we can provide high-efficiency membrane absorbers. All waste gases are chemically absorbed with nitric acid, and ammonium salts are sold as fertilizers, which is equivalent to building a small fertilizer plant. Everything is started from scratch. The purchase of liquid ammonia and nitric acid requires help from others, which is greatly affected by the market. The ammonia recycling plan will reduce the transportation of liquid ammonia, if your factory does not produce liquid ammonia.
The last set of ammonia recovery system, ammonia-containing waste gas - ammonia washing tower - distillation tower - condenser - liquid ammonia recovery and use
do* * It’s hard to go through the project procedures!
Our company can help solve the problem. If you are interested, please send the detailed parameters and on-site working conditions information to my email, and we will help you with the initial design.~ yongqiang2010@sina.com
This post was last edited by zphero2008 on 2009-10-15 19:43. Our company plans to use sulfuric acid to absorb waste ammonia and recycle it. What are the requirements for sulfuric acid concentration? Ammonia gas is about 3t/h, about 70°