Continuous activated carbon washing and drying device

Abstract

The invention relates to a continuous activated carbon washing and drying device. The continuous activated carbon washing and drying device comprises a carbon slurry supplying device, a belt-type filter, a blanking hopper, a vacuum absorption and filtration device, a vacuum tank, a washing and spraying device and pipelines for connection, wherein the running direction of the belt-type filter is taken as the criterion, the carbon slurry supplying device is arranged at the front upper part of the belt-type filter; the blanking hopper is arranged at the rear lower part of the belt-type filter; the washing and spraying device is arranged above the belt-type filter; the lower part of the belt-type filter is provided with the vacuum tank which is connected with the belt-type filter through a pipeline and is also connected with the washing and spraying device as well as the vacuum absorption and filtration device. The device washes (extracts) phosphoric acid which is the residual of phosphoric acid liquids with different gradients in clearances of activated carbon, meanwhile dehydrates washed activated carbon by adopting a vacuum negative pressure suction filtration mode, and reduces the residual phosphorus quantity of the activated carbon which is collected by acid pickling so as to further reduce the consumption quantity of phosphoric acid in activated carbon production; dehydrating is conducted by adopting a vacuumizing mode, so that the dehydrating 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...

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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

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