Novel dry-method denitrification and denitration method of cement kiln

Abstract

The invention discloses a novel dry-method denitrification and denitration method of a cement kiln. The method comprises the following steps of a, preparation before production: connecting water and electric pipelines through according to the production, arranging a workplace, arranging a production device of each link of the cement kiln for producing cement, staffing, preparing a raw material, according to a production technical requirement and a waste gas emission standard, seriously drawing up production organization design, and making a production monitoring plan; and b, additional mounting of double channels on a kiln tail burner: mounting the kiln tail burner with the double channels on a vertebral body of an existing novel dry-method preheater decomposing furnace for a cement plant,and arranging an ammonia water delivery pipeline on one channel of the kiln tail burner. The method has the beneficial effects that the invention, compared with the prior art, provides a dry-method production method of the cement kiln, through which an ammonia water spraying-into amount can be reduced by a wide margin and moreover the emission of NOx is reduced; and the method not only does not need the huge investment of SCR, but also has no the worry of pollutant interchange, and is also used for eliminating the existing problem of the transfer of an SNCR pollutant.

Description

technical field [0001] The invention relates to the technical field of novel dry method production of cement clinker, in particular to a method for denitrification and denitrification of a novel dry method cement kiln. Background technique [0002] Nitrogen oxides are a kind of gas that occurs during cement calcination. It is polluting to the atmosphere and harmful to the human body. Specifically, it has the following hazards: (1) Toxic to the human body; (2) Acid rain (3) After the nitrogen oxides and volatile organic compounds in the atmosphere reach a certain concentration, they will produce a series of photochemical reactions under the irradiation of sunlight, which can form photochemical smog; (4) participate in Destruction of the ozone layer; (5) damage to plants. With the increase of the production capacity of the cement industry, the emission of nitrogen oxides is increasing. The original national emission standard was 800mg / Nm3, which was released in 2014. The "Cem...

AI Technical Summary

Problems solved by technology

The one-time investment of this technology is huge, as high as more than ten million yuan. As an effective catalyst, vanadium pentoxide itself is a highly toxic substance. When the catalyst fails, it needs to be disposed of. Basically, pollution is exchanged for pollution.