Preparation for water chestnut leather activated char

Abstract

The invention relates to a method for preparing the activated charcoal of water caltrop peels which comprises the preparation of the powdered activated charcoal of water caltrop peels and the lumpish activated charcoal of water caltrop peels. The preparation method of the invention comprises the steps of drying, pre-oxidation, washing, baking and carbonization. Since the method does not adopt methods such as a potassium hydroxide process and a zinc chloride process, etc., during the preparation process, not only environmental pollution can be avoided, but also the operation becomes simple. The activated charcoal of water caltrop peels prepared by the method of the invention can be applied to a plurality of fields. The powdered activated charcoal can be used as an adsorbent to absorb a plurality of common substances as well as toxic and harmful substances such as dyes and phenol, etc., while the lumpish activated charcoal can be taken as fillers used in fluidized beds, moving beds and certain fixed beds and the fillers have better bio-affinity and hydrophilicity, are beneficial to biofilm culturing and cause no secondary pollution to environment after being disused.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of water chestnut skin activated carbon. Background technique [0002] At present, the raw materials for preparing activated carbon mainly include wood, wood chips, fruit shells, etc., among which wood is the main material. However, in recent years, the forest coverage rate has dropped sharply, and the supply of wood has decreased, so that the raw material supply of activated carbon is showing a tense trend, and the price is also on the rise. , so that the preparation and utilization of activated carbon are greatly restricted. In addition, some activated carbons are prepared from coal, sludge, and plastics, but these raw materials will cause environmental pollution, so they cannot be widely used at present. Recently, the use of fruit shells to make activated carbon has been favored by researchers, but most of the fruit shells are produced in scatte...

AI Technical Summary

Problems solved by technology

[0002] At present, the raw materials for preparing activated carbon mainly include wood, wood chips, fruit shells, etc., among which wood is the main material. However, in recent years, the forest coverage rate has dropped sharply, and the supply of wood has decreased, so that the raw material supply of activated carbon is showing a tense trend, and the price is also on the rise. , leading to great restrictions on the preparation and utilization of activated carbon

In addition, some activated carbons are prepared from coal, sludge, and plastics, but these raw materials will cause environmental pollution, so they cannot be widely used at present.

Recently, the use of fruit shells to make activated carbon has been favored by researchers, but most of the fruit shells are produced in scattered places, which are difficult to collect centrally, and the cost is high, and it is difficult to popularize and use

In addition, the existing activated carbon preparation processes are mainly potassium hydroxide method and zinc chloride method, and the waste liquid produced by these two methods is difficult to reuse, it is easier to cause environmental pollution, and it is more dangerous during operation