Process for preparing 1-nitronaphthalene through continuous low-temperature nitration

The invention discloses a process for preparing 1-nitronaphthalene through continuous low-temperature nitration, wherein the process mainly comprises nitration, pre-washing, neutralization and washing procedures; a nitration device is formed by connecting three nitration kettles, a waste acid extraction kettle, two pre-washing kettles, two neutralization kettles and two washing kettles in series; the three nitration kettles comprise a 1# nitration kettle, a 2# nitration kettle and a 3# nitration kettle; the two pre-washing kettles comprise a 1# pre-washing kettle and a 2# pre-washing kettle; the two neutralization kettles comprise a 1# neutralization kettle and a 2# neutralization kettle; and the two washing kettles comprise a 1# washing kettle and a 2# washing kettle. The process parameters are stable, the yield and quality of the product are improved and stabilized, safety production is facilitated, and automatic control is easy to achieve. 本发明公开了连续低温硝化制备1-硝基萘的工艺，主要包含有硝化、预洗、中和、洗涤工序，硝化装置由三台硝化釜、一台废酸萃取釜、两台预洗釜、