Preparation and use method of coal carbon efficient energy-saving desulphurization additive

Abstract

A method of preparation for high-efficiency and energy-saving desulfuration additive of coal, which is characterized in that its components comprise the following materials by weight percentage: 30-40% ammonium perchlorate, 5-12% manganese carbonate, 5-12% zinc oxide, 10-23% sodium permanganate, 3-9% manganese dioxide, and 20-35% calcium phosphate primary. The above materials are mixed and broken up, and screened with sieve of 250-300 meshes. A method of application for high-efficiency and energy-saving desulfuration additive of coal in that the additive is fully mixed with coal for firing in furnace, wherein the weight ratio between the additive and the coal is between 3 to 1000 and 8 to 1000. While the coal is fired, the additive not only supports combustion to reduce coal consumption but more effectively decreases harmful gases in the furnace by firing, removing and defusing impurities and harmful substances in the coal so that no harmful substances are formed and discharged.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS)[0001]This application is related to co-pending Chinese Patent Application No. 200810238447.7, filed on Dec. 12, 2008, in the State Intellectual Property Office of the People's Republic of China, the entire content of which is incorporated herein by reference.BACKGROUND[0002]1. Field[0003]The present invention relates to a method of preparation and application for high-efficiency and energy-saving desulfuration additive of coal, particularly to the methods which provide desulfuration, smoke abatement, dust removal and energy-saving in coal firing when the said additive is used.[0004]2. Description of the Related Art[0005]If firing coal in the existing boilers or kilns, it will generate a large amount of sulfur dioxide and nitrogen monoxide as well as smoke and dust, which pollutes the environment. Although a plurality of methods and approaches are available for eliminating smoke and dust, the effect is not quite satisfactory. Moreover, the exi...

AI Technical Summary

Benefits of technology

[0006]The present invention is intended to provide a method of preparation and application for high-efficiency and energy-saving desulfuration additive of coal. While the coal is fired, the said method not only supports combustion to reduce coal consumption but also more effectively decreases harmful gases in the furnace by firing, removing and defusing impurities and harmful substances in the coal so that no harmful substances are formed and discharged, i.e. eliminating and defusing harmful substances from the source to meet the discharge standard for harmful substances.

[0011]The beneficial effect of the present invention is that the coal is fully burned and the utilization factor of coal resource improved, saving coal by up to 20%. Furthermore, harmful gases in coal are decreased during firing so that the discharged fume meets the national standard. Repeated tests and comparison monitoring indicate that the discharge amount of smoke and dust are reduced by 88%, Ringelmen blackness dropped to Grades 0-0.5, sulfur dioxide reduced by 85% and carbon monoxide by 35%, and the effect is better than the widely used desulfuration and dust-removing processes by physical and mechanical equipment at present.

Problems solved by technology

If firing coal in the existing boilers or kilns, it will generate a large amount of sulfur dioxide and nitrogen monoxide as well as smoke and dust, which pollutes the environment.

Although a plurality of methods and approaches are available for eliminating smoke and dust, the effect is not quite satisfactory.

Moreover, the existing firing process of coal leaves some unburned core and cinder, which leading to energy waste.