Degassing method in spinning bath for viscose fiber production

The invention relates to a degassing method in a spinning bath for viscose fiber production. The degassing method comprises the following steps: firstly, pumping the spinning bath into a first degassing tank in a vacuum state from an underground groove by virtue of an acid pump, in the first degassing tank, removing hydrogen sulphide in the spinning bath under the action of vacuum, enabling one part of the removed hydrogen sulphide to be discharged through an exhaust port of a water ring vacuum pump and enter a hydrogen sulphide treatment process, and enabling the rest of the removed hydrogen sulphide to be dissolved in operating water of the water ring vacuum pump; and secondly, enabling the operating water of the water ring vacuum pump to enter a second degassing tank in the vacuum state, in the second degassing tank, removing dissolved hydrogen sulphide in the operating water, and enabling the removed hydrogen sulphide to be discharged through an exhaust port of a second vacuum pump and enter the hydrogen sulphide treatment process. By adopting the degassing method provided by the invention, the operating water of the water ring vacuum pump can be introduced into the second degassing tank to be degassed, the total amount of hydrogen sulphide gas separated out in a process that the operating water enters a wastewater treatment system is reduced, and the environmental pollution is reduced.