Technology for the expansion of small sized nitrogenous fertilizer plant with coal as raw material to co-produce methanol, urea or ammonium carbonate;

This paper stated the reason and harm of producing waste gas,the way of dealing with and effects in small nitrogenous fertilizer factory.

Slime-water treatment for a small coal preparation plant;

Conversion of cleaning process and equipment for a small and medium coal preparation plant;

Confirmation of FGD system reforming technology for middle and small coal-fired power plant;