Dinaphthol production continuous neutralization reaction method

The invention relates to the technical field of dinaphthol production, and particularly relates to a dinaphthol production continuous neutralization reaction method. The dinaphthol production continuous neutralization reaction method comprises the following steps: controlling flow of a sodium sulfite solution and naphthalene sulfonic acid; inputting the sodium sulfite solution in three times; andafter carrying out five stages of neutralization reaction and alkali regulation, obtaining a final neutralized solution, wherein a molar ratio of the sodium sulfite solution to the naphthalene sulfonic acid is (95 to 98):100 in the overall neutralization reaction process; and sulfur dioxide gas is discharged from the tops of first to fourth stages of neutralization reaction kettles, and is collected for acidification. The internal neutralization reaction temperature in each stage of the neutralization reaction kettles is 95 to 100 DEG C; and the mass ratio of a primary sodium sulfite solutionto a secondary sodium sulf