Active brown coal and preparation method thereof

Abstract

The invention discloses active brown coal and a preparation method thereof. Technical indicators of the active brown coal are as follows: an iodine value ranges from 300mg / g to 600mg / g; stacking density ranges from 450kg / m<3> and 700kg / m<3>; a phenol value is more than 100%; a PH value ranges from 6 to 9; a macropore ratio ranges from 80% to 90%; and granularity Dmax is less than 1mm. The preparation method comprises the following steps that: raw coal of the brown coal is crushed and screened, and particles after crushing and screening are subjected to integration processing of carbonization, oxidization and activation, then cooled and finally sealed and packaged. The active brown coal preparation method is simple; the prepared active brown coal has the advantages of being stable in property, developed in macropore structure, applicable to adhesion, auxiliary vitality and growth of microorganisms, rich in surface chemical functional group, high in catalytic activity and low in cost; and the prepared active brown coal can be adopted as a substitute of the conventional active carbon to be used in the sewage treatment field and solves the problem that the conventional active carbon is poor in bioactivity and high in cost when being used in the sewage treatment.

Description

technical field

[0001] The invention relates to the technical field of active lignite, in particular to an active lignite and a preparation method thereof. Background technique

[0002] Water is the source of life, and ensuring the quality of water sources is the basis for ensuring the health and safety of the people. However, in recent decades, as my country's economy has entered a stage of rapid growth, environmental pollution has become increasingly serious, and water quality problems have become increasingly prominent. How to purify sewage economically and efficiently is a difficult problem.

[0003] At present, there are a large number of sewage treatment processes using activated carbon as a carrier at home and abroad, but the price of activated carbon is relatively expensive (the average price of conventional activated carbon is 5,000 yuan / ton), the treatment cost is very high, and it is difficult to promote and apply on a large scale. Abundant and cheap adsorption p...

Images