Dear acid enthusiasts, regarding the pre-conversion system
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Dear acid industry professionals, regarding the pre-conversion system: should the gas be diverted to the pre-conversion unit from the inlet of the sulfur dioxide fan or from its outlet? What are the advantages and disadvantages of each approach to pre-conversion? Let’s discuss this!
Embarrassing, I’ve only heard of pre-protection
Pre-conversion doesn’t seem to be used much in China at the moment; as far as is known, Chifeng Yuncopper and Heilongjiang Zijin use this design
Chifeng Yuntong has pre-conversion; it seems that Heizizi doesn’t have it
What is the popular approach these days?
Different processes have different application ranges; aside from Bayer’s principle, they are all similar in that sulfur trioxide is used to inhibit a certain reaction, with the difference lying in the method used to obtain sulfur trioxide
Branch loop gas: a portion of the gas is converted in advance, and the applicable gas concentration range also varies
The pre-conversion process is important; more than one user requiring pre-conversion needs to use an electric furnace
Pre-conversion systems are now widely used. When air is distributed at the inlet of the main fan, a greater pressure increase is required for the backup fan, which places higher demands on that fan. Currently, air distribution takes place at the outlet of the main fan; in this case, the backup fan only needs to handle the pressure increase required by the pre-conversion system.