High-efficiency denitration ionic liquid and application method thereof

Abstract

The invention relates to high-efficiency denitration ionic liquid, which belongs to the technical field of smoke treatment. The high-efficiency denitration ionic liquid comprises the following components: 15 to 30 parts of urea-based organic peptide, 60 to 80 parts of deionized water, 5 to 10 parts of catalyst, 1 to 5 parts of stabilizers, and 1 to 5 parts of regulator. The components are added into a high-speed dispersion device to be dispersed at a high speed, and the stable high-efficiency denitration ionic liquid can be formed by virtue of the dispersion and reaction. An application methodof the high-efficiency denitration ionic liquid comprises the following steps: spraying the prepared ionic liquid into a denitration reactor by using a spray gun, wherein the application temperatureis 450 to 1250 DEG C. According to the high-efficiency denitration ionic liquid and the application method thereof, the high-efficiency denitration ionic liquid is colorless, tasteless and non-corrosive liquid, is safe in transportation and storage, convenient and simple to use, free from secondary pollution, wide in operating temperature range, and capable of being operated at 450 to 1250 DEG C;the method does not cause any crystallization and blockage when in operation; and after the product is put into the high temperature area, the smoke sufficiently contacts the denitration ionic liquid,so that the reduction time of the liquid catalyst and the smoke can be increased, and the escaping can be avoided.

Description

Technical field [0001] The invention belongs to the technical field of flue gas treatment, and specifically relates to a high-efficiency denitration ionic liquid and a use method thereof. Background technique [0002] The NOx produced by the combustion of fossil fuels such as coal and petroleum is the main source of nitrogen oxides in the atmosphere. Excessive NOx emissions have caused more and more serious environmental pollution, such as photochemical smog, acid rain, ozone layer destruction and greenhouse effect. In recent years, the country has implemented more stringent restrictions on NOx emissions in the tail gas of power plants, and power plants have also adopted many feasible measures to reduce the generation and emissions of NOx during coal combustion. [0003] Among these technical measures, selective catalytic reduction and SCR denitration technology have been proven to be one of the most mature and effective technologies for controlling NOx emissions in tail gas, and ...

AI Technical Summary

Problems solved by technology

Unstable flue gas temperature or low time will cause low denitrification efficiency, unreacted ammonia or urea enters the tail flue, causing ammonia to escape, blocking the air preheater, corroding the flue, forming ammonium sulfate crystals, and producing Cloth bag crystallization affects the load and reduces the denitrification efficiency

[0005] Ozone denitrification method: The use of ozone oxidation technology has a good removal effect on NOx between 90-250 °C, but the existing technology cannot guarantee complete reaction and absorption, and ozone can react with almost any biological tissue, and incompletely reacted ozone enters secondary air pollution

[0006] PNCR denitrification technology: This process equipment is simple, the fixed investment is small, but the efficiency is low and the stability is poor

[0007] The ammonia water denitrification process has low efficiency and high operating costs. Some improved denitrification liquids are mixed with suspended particles, which can easily cause suspended particles to accumulate at the nozzle of the spray gun, causing blockage of the nozzle and affecting denitrification; at the same time, it is necessary to modify the spraying process. Make boiler retrofitting difficult