Longbai Group obtained a patent for wet desulfurization to realize the recycling of waste acid from titanium dioxide produced by sulfuric acid process

On July 10, 2024, Tianyancha's intellectual property information showed that Longbai Group Co., Ltd. obtained a method for treating wet desulfurization spray liquid to inhibit the formation of sulfur dioxide, authorization announcement number CN115259445B, application date is July 2022.

The patent abstract shows that the present invention provides a method for treating wet desulfurization spray liquid that suppresses the generation of sulfur dioxide, which comprises the following steps: S1. Mixing the wet desulfurization spray liquid with a substance A that contains calcium hydroxide or can generate calcium hydroxide when contacted with water; S2. Add waste acid from sulfuric acid process titanium dioxide to the mixed liquid obtained in step S1, carry out neutralization, and control the addition speed of waste acid during the reaction process, so that the pH of the entire system is always in the range of pH greater than 7 during the reaction process, and the pH at the end of the reaction is controlled to 7 - 9.5;S3. Carry out solid-liquid separation on the neutralized material, then take the filtrate for aeration, then add a flocculant for flocculation, and after solid-liquid separation again, a clear liquid that meets the effluent standard is obtained. The treatment method provided by the invention has simple process and excellent effect, and simultaneously realizes the recovery and utilization of waste acid from titanium dioxide by the sulfuric acid process.