Phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process

Abstract

The invention discloses a phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process, and belongs to the technical field of phosphoric acid method activated carbon. According to the process, carbon slurry is dehydrated, phosphoric acid is collected, then inlet water is added in sequence to carry out dehydration treatment on activated carbon, and outlet water of each time is collected to be used for treating the next batch of carbon slurry; the first inlet water is phosphoric acid of 25-35 Baume degrees, the second inlet water is phosphoric acid of 18-25 Baume degrees, the third inlet water is phosphoric acid of 12-18 Baume degrees, the fourth inlet water is phosphoric acid of 5-12 Baume degrees, the fifth inlet water is phosphoric acid of 2-5 Baume degrees, the sixth inlet water is phosphoric acid of 0-1 Baume degrees, and the seventh inlet water is clean water without chlorine. According to the process, by controlling the concentration of phosphoric acid in inlet water added each time and cooperating with a dehydration process, activated activated carbon is effectively rinsed and dehydrated, meanwhile, phosphoric acid is effectively recovered, the obtained finished product is thoroughly rinsed, the ash content is low, the quality is excellent, and a green and sustainable production mode is formed.

Description

technical field [0001] The invention belongs to the technical field of phosphoric acid activated carbon, and in particular relates to a three-in-one automatic process of phosphoric acid activated carbon recovery, rinsing and dehydration. Background technique [0002] Activated carbon by phosphoric acid method refers to activated carbon prepared by phosphoric acid method. During the preparation process, the activated carbon raw material is soaked in a certain concentration of phosphoric acid solution, and then activated at high temperature. After activation, the phosphoric acid in the activated carbon is washed away, and phosphoric acid is obtained after drying. activated carbon. The rinsing step in the preparation of phosphoric acid-based activated carbon is extremely critical. Rinsing can fully wash the phosphoric acid in the activated carbon and avoid phosphoric acid residues, resulting in a small amount of acidic impurities remaining in the pores of the activated carbon a...

AI Technical Summary

Problems solved by technology

In the existing phosphoric acid-based activated carbon production process, the recovery of phosphoric acid in the pores of the activated material is generally carried out using a recovery barrel or a plate-and-frame filter press. These two recovery methods often have a residual phosphorus content of more than 3% in the recovered activated carbon pores, and The dehydration efficiency is not high, and it cannot be processed continuously. As a result, it is common in the prior art to achieve good acid recovery, washing and dehydration effects even after the cooperation of multiple equipments.

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