Method and device for removing oxynitride in smoke by organic waste

Abstract

The invention provides method and device for removing oxynitride in smoke by organic waste. The method comprises the following steps: spraying concentrated organic waste to a high temperature area of a boiler or a kiln hearth to be contacted and reacted with smoke, wherein the chemical oxygen demand of the organic waste is greater than 150g/L; and decomposing the organic waste into small molecular hydrocarbon which is reacted with oxynitride in smoke to generate nitrogen and water so as to remove oxynitride in smoke. The device comprises an organic waste storage tank, a slush pump, an organic waste pressure stabilizing tank, an air compressor, an air pressure stabilizing tank and a plurality of spray guns, wherein the spray guns are arranged in the high temperature area of the boiler or the kiln hearth by layers. Each spray gun is provided with a liquid connector and a gas connector. The liquid connector is sequentially connected with the organic waste pressure stabilizing tank, the slush pump and the organic waste storage tank, while the gas connector is sequentially connected with the organic waste pressure stabilizing tank and the air compressor. By means of treatment of wastes with processes of wastes against one another, the method and device provided by the invention are efficient, and the operating cost for treating waste and removing oxynitride in smoke is lowered.

Description

technical field [0001] The invention relates to a method and a device for removing nitrogen oxides in flue gas by using organic waste, and belongs to the technical field of environmental pollution control. Background technique [0002] Nitrogen oxides (mainly nitric oxide and nitrogen dioxide) are important causes of photochemical smog and acid rain. Nitrogen oxides and hydrocarbons react with ultraviolet radiation to form photochemical smog. Photochemical smog has a special smell, which can irritate human eyes, nose, trachea and lungs and other organs, resulting in symptoms such as red eyes, wheezing and coughing. Long-term damage can cause lung function decline , bronchial inflammation, and even develop into cancer; nitrogen oxides and ammonia produce nitrate fine particles, reducing atmospheric visibility; nitrogen oxides and water produce nitric acid and nitrous acid, forming acid rain and endangering the ecological environment. [0003] In 2011, my country's nitrogen o...

AI Technical Summary

Problems solved by technology

If my country's cement kilns and coal-fired industrial boilers adopt the SNCR ammonia denitrification technology, about 2.5 million tons of ammonia will be consumed each year, accounting for 5% of the total ammonia production in the country, and its by-product is non-recyclable nitrogen, which will compete with farmers for food. , waste of ammonia resources

[0017] Second, a large waste of resources and energy

[0018] Third, the overall cost is high

The pollution control process is complex and lengthy, with large investment and high operating costs, and the construction of polluting facilities is more important than operation, which makes it difficult to fundamentally improve the environmental performance of enterprises and the environmental quality of the region

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