Nitric acid concentration technology and equipment
Thread Content
In the nitric acid concentration stage of nitric acid production, the magnesia nitrate method is widely used in China for this purpose. The main equipment consists of silicomagnesium towers with a diameter of φ1000 (with a few having a diameter of φ1200), equipped with ceramic plate corrugated fillers. At the top of the tower, there is a silicomagnesium tube condenser, while at the bottom of the tower, there is a kettle-type reboiler. The production capacity of a single tower is approximately 20,000 tons per year; therefore, a nitric acid plant with a production capacity of 135,000 tons per year requires multiple nitric acid concentration systems, which presents various inconveniences. With the rapid advancement of technology, the production of dilute nitric acid used in nitric acid manufacturing has increasingly been carried out on a large scale. I wonder whether the method commonly used for nitric acid concentration abroad is the magnesium nitrate method or the sulfuric acid method? What is the production capacity of a single tower? What are the materials of the tower body, and what are the types and materials of the internal components of the tower? What about the material of the tower top condenser? I would appreciate your advice!
I have done a lot of solvent recovery work, but I haven’t worked with nitric acid
In comparison, the magnesium nitrate method requires less investment and its technology is mature; however, its production capacity per unit is limited. This method is widely used in China – it’s quite reliable! ； The investment required for the sulfuric acid method is high, as it involves the use of glass-lined materials and precious metals (in the past, domestic technology was limited, but now self-sufficiency is possible); however, the glass-lined components still need to be sourced from foreign companies or imported. Nonetheless, the production capacity per unit setup can be high.
I’m from Guanshan, Nanjing: lol
:handshake:handshake
Breakthroughs have been made in domestic glass-lined reboilers; vaporizing acid is not a problem and can be resolved. Those who are interested can contact me for inquiries.
There are no problems with the reboiler; the key issue is the enlargement of the tower and its internals.
The only problem is the rupture of the ferrosilicon jacketing, which needs to be replaced
Are there any colleagues who are familiar with foreign nitric acid concentration engineering technologies? I welcome your advice!