A method of utilizing the ammonia soda and chlorine Alkali Alkali application mixture prepared

The present invention discloses a method of preparing a mixture of spent caustic alkali dechlorination using ammonia soda residue, comprising the step of: step 1, back to first return sand stone crushing, grinding powder back into the sand back; Step 2, back to the return sand powder after immersion in water 0.5 to 14 days Digestion calcium peroxide burning, then returned back to sand after digestion Alkali powder, mixed with water, by mass% material, the sand back to the digestion and caustic sludge dry powder mass returning ratio of 2: 8 to 5: 5, the total mass of the water returning after digestion of sand returning from 1.5 to 8 times the mass of the total dry powder and soda residue; or, will return back to the sand powder, mixing water, caustic sludge after soaking 0.5 Digestion to 14 days burning calcium peroxide; step 3, was press treatment, to obtain the chloride ion content less than 0.30% by mass of the total solid mixture of alkaline residue chlorine mixture. The present invention also discloses the use of a mixture of the chlorine caustic sludge. Dechlorination good effect of the present invention, the process is simple, energy saving.