A device for continuous washing and drying of activated carbon

Abstract

The invention relates to a device for continuous washing and drying of activated carbon, comprising a carbon slurry feeding device, a belt filter, a lower hopper, a vacuum suction filter device, a vacuum tank, a washing spray device and a connecting pipeline; According to the running direction of the machine, a carbon slurry feeding device is provided at the front and top, and a lower hopper is provided at the bottom of the rear; a washing and spraying device is provided above the belt filter, and a washing and spraying device is provided at the bottom of the belt filter. A vacuum tank is provided; the vacuum tank is connected with a belt filter by a pipeline; the vacuum tank is also connected with a washing spray device and a vacuum suction filter device, and the device removes the phosphoric acid remaining in the activated carbon gap through different gradient phosphoric acid liquids. After washing (extraction), the washed activated carbon is dehydrated by vacuum negative pressure filtration, which reduces the amount of residual phosphorus in the activated carbon collected by pickling, thereby reducing the consumption of phosphoric acid in the production of activated carbon; and adopts a vacuum method Dehydration is carried out, and the dehydration efficiency of activated carbon is improved.

Description

technical field [0001] The invention relates to the technical field of activated carbon production, in particular to a device for continuously washing and drying activated carbon. Background technique [0002] Phosphoric acid method wood activated carbon production process, including the use of phosphoric acid water with different concentration gradients to extract the phosphoric acid in the activated carbon material, the usual concentration is 65 ~ 85 degrees Baume, to recover the raw phosphoric acid, and then pickling Or washed activated carbon for dehydration. [0003] In the existing 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 are limited by factors such as the environment, the concentration of the extract, and the number of extractions. The amount of residual phosphorus in the activated carbon por...

AI Technical Summary

Problems solved by technology

[0003] In the existing 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 are limited by factors such as the environment, the concentration of the extract, and the number of extractions. The amount of residual phosphorus in the activated carbon pores is still relatively high (≥3%); and the subsequent plate and frame dehydration process usually uses compressed air for one-way drying, which has the disadvantage of low dehydration efficiency (only activated carbon Dehydration from 80% to about 70% moisture content) and the shortcomings of intermittent production, even the recently emerged vacuum dehydration combined equipment (which can dehydrate the moisture content of activated carbon from 70% to about 65%) is also a problem for the plate-frame filter plate The sealing puts forward strict requirements, which also limits its practical application in the activated carbon industry

Images