Preparation method of briquetted active carbon

Abstract

The invention relates to a preparation method of briquetted active carbon, which sequentially comprises the following technical processes: (1) oxidizing and drying a coal material; (2) mixing; (3) pulverizing; (4) molding; (5) charring; (6) drying the charred material; (7) activating; (8) screening the activated material; (9) performing acid pickling; and (10) drying the acid-pickled material. The method has the advantages of low investment, high yield, favorable environmental protection effect, low cost and low comprehensive energy consumption. The product has the characteristics of light bulk specific gravity, well-developed macropores, mesopores and minipores, and high adsorption speed.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, in particular to a method for preparing activated carbon, in particular to a method for preparing briquetted activated carbon. Background technique [0002] Activated carbon is a hydrophobic adsorbent made from carbon-containing substances as raw materials, which is carbonized and activated at high temperature. Activated carbon contains a large number of micropores, has a huge specific surface area, can effectively remove color, odor, and remove organic pollutants and some inorganic substances in water bodies. It is widely used in environmental protection, chemical industry and other fields. Therefore, its The demand is increasing year by year. my country has abundant coal reserves, which can be effectively used to prepare coal-based activated carbon. According to different raw materials, coal-based activated carbon is divided into crushed activated carbon, columnar activated carbon and br...

AI Technical Summary

Problems solved by technology

[0003] Anthracite plus tar formed columnar activated carbon, because the raw materials and products used are very different from briquetted activated carbon, and its cost is high, and the carbonization has a great impact on the environment

Raw smoke crushed carbon, this kind of activated carbon is low-grade activated carbon, low cost, and the product quality is due to the high floating rate and the pore structure cannot be adjusted, so its application range is limited, and the coal quality is strict.

[0004] The briquette activated carbon has low ash, good molding, good pore forming, and has certain adhesiveness, and the strength is above 90, but it has higher requirements for the production of raw coal

Strength is an important indicator of the performance of briquetted activated carbon. The cohesiveness of weakly caking coal is appropriate, and briquetted activated carbon with adsorption indicators that meet the requirements can be prepared, but the reserves of this weakly caking coal are very limited; although the coal reserves are relatively large. Low, the strength of the manufactured briquetted activated carbon products is difficult to meet the market demand

The raw coal for the production of briquetted activated carbon needs to be found in coking coal. However, due to the high ash content and poor washability of coking coal in my country, it is difficult to meet the production requirements of briquetted activated carbon. At present, the briquetted activated carbon products produced by the existing technology are still There are defects such as high production cost and unstable performance