Device and method for continuously washing and drying activated carbon

Abstract

The invention relates to a device and method for continuously washing and drying activated carbon. The device comprises a carbon slurry material feeding device, a belt type filter, a discharging hopper, a vacuum sucking and filtering device, vacuum tanks, a washing and spraying device and a pipeline for connection, wherein by taking the moving direction of the belt type filter as the reference, the carbon slurry material feeding device is arranged above the belt type filter, and the discharging hopper is arranged at the lower left side of the belt type filter; the washing and spraying device is arranged above the belt type filter, and the vacuum tanks are arranged at the lower part of the belt type filter; the vacuum tanks are connected with the belt type filter through the pipeline, and the vacuum tanks are also connected with the washing and spraying device and the vacuum sucking and filtering device. For the device and the method disclosed by the invention, phosphoric acid remained in a gap of the activated carbon is washed out through phosphoric acid liquid in different gradients, besides the washed activated carbon is dehydrated in a vacuum negative pressure suction filtration manner, so that the phosphorus residual quantity of the activated carbon obtained after being subjected to acid pickling is reduced, and then the consumption of the phosphoric acid in the production of the activated carbon is reduced; a vacuumizing manner is adopted to perform the dehydration, so that the dehydrating efficiency of the activated carbon is improved.

Description

technical field [0001] The invention relates to the technical field of activated carbon production, in particular to a device and method 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...

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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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