Liquid state coal-saving additive

Abstract

The invention discloses a liquid state coal-saving additive, comprising the following components, by weight percent, 5-10% of ethylene oxide-propylene oxide polymer, 5-10% of sodium alkyl benzene sulfonate, 4-8% of ferric nitrate, 6-10% of manganous nitrate, 6-10% of barium nitrate, 4-8% of aluminium nitrate and the balance of water. Through the mixing of the ethylene oxide-propylene oxide polymer, the sodium alkyl benzene sulfonate and the nitrates in the presence of water for the formation of the liquid state coal-saving additive, the heat efficiency of a coal fired boiler can be improved obviously; a pulverized coal boiler of a large power station has better effect as well; moreover, the raw material is easy to obtain; the consumed liquid state coal-saving additive is less than five parts in ten thousand; and therefore, the cost is low.

Description

technical field [0001] The invention relates to the technical field of coal-burning additives for boilers, in particular to a liquid coal-saving additive. Background technique [0002] Coal-fired equipment includes coal-fired power plant boilers, industrial boilers, coke ovens, iron and steel smelting blast furnaces, etc. The coal-fired efficiency of large-capacity (above 300MW) power plant boilers has reached 89-92%, relatively speaking, it is one of the methods with the highest energy utilization rate at present; the coal-fired efficiency of small-capacity (below 300MW) power plant boilers is only 85-88% %, the energy utilization rate is relatively low. Every year, my country's thermal power industry loses about 100 million tons of coal due to incomplete combustion of boilers, wasting a lot of energy. [0003] Energy-saving and emission-reduction technologies for coal-fired, one is to promote the complete combustion of coal, and the other is to control the SO 2 with NO ...

AI Technical Summary

Problems solved by technology

[0004] At present, the coal-saving additives researched at home and abroad mainly use strong oxidants as the main component, but strong oxidants have certain corrosion to boiler equipment, are harmful to human body, and belong to dangerous goods; Chinese patent CN1233805 (a coal-fired additive for boilers, 2003-12 -1) An additive is disclosed, wherein sodium chloride accounting for 5-20% by weight of the additive is used, but chloride ions are easy to form HCl gas in a coal-burning atmosphere, which is harmful to boiler water walls, superheaters, and reheaters Pipelines cause corrosion; the additive also employs 2-10% by weight of the additive of carbonates, which decompose at high temperatures to produce CO 2 , increasing the pollution of the environment

In addition, some liquid coal-saving additives have poor water solubility and are difficult to fully mix with coal, resulting in poor coal-saving effect and inconvenient use

Images