Recycling method of Foshan for panel cleaning and its apparatus

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for recycling hydrofluoric acid for use in a cathode ray tube panel, . In this case, a precipitant such as sodium carbonate or caustic soda is added to the reuse tank (1) containing the waste acid without disposing the spent hydrofluoric acid, so that the chemical reaction is caused to precipitate the precipitate down and removed. The fluoric acid regenerated by the hydrofluoric acid is transferred to the fluoric acid tank 2 to clean the glass tube panel glass so that the spent fluoric acid after the cleaning treatment can be repeatedly recycled without being discarded to drastically reduce the amount of hydrofluoric acid used for cleaning the glass tube panel glass As a result, not only is it possible to drastically reduce the cost of hydrofluoric acid, The processing cost of disposal By minimizing the amount of wasted hydrofluoric acid introduced can be reduced significantly.