A nitrogen oxide tail gas treatment system

Abstract

The invention discloses a tail gas treatment system containing nitrogen oxides. The treatment system of the invention has high absorption efficiency, the treatment reaches the standard, the highest absorption efficiency can reach 99.5%, and the emission concentration of nitrogen oxides is ≤200mg / m 3 , low investment and operation costs, high integration, and large operating flexibility; and each absorption and treatment unit of the device is an independent mechanism, which can be operated and controlled separately, which can ensure that the exhaust gas at the outlet meets the standard discharge under the most economical conditions; maintenance and adjustment are not necessary. The entire system needs to be shut down, which can ensure the continuous absorption and treatment; it can also ensure that the high-concentration waste gas is treated with the absorption liquid with high solute content, and the low-concentration waste gas is treated with the absorption liquid with low solute content, so as to ensure that the exhaust gas is discharged better. The waste of absorption liquid and the cost of subsequent treatment can be avoided by the discharge of absorption liquid with high solute content; the automatic replacement of water between water tanks is realized by using float valve and siphon tube, which is simple and practical, and has a lower failure rate.

Description

technical field [0001] The invention relates to a waste gas treatment system, in particular to a nitrogen oxide tail gas treatment system. Background technique [0002] Nitric oxide, nitrogen dioxide, laughing gas, nitrogen pentoxide, etc. are common components in tail gas containing nitrogen oxides. They are common air pollutants, and the main components are nitrogen monoxide and nitrogen dioxide. [0003] The treatment methods of nitrogen oxides include reduction method, plasma activation method, biochemical method, adsorption method and liquid absorption method. The liquid absorption method is a method of absorbing nitrogen oxides in the exhaust gas with water or an aqueous acid, alkali, or salt solution to purify the exhaust gas. However, the single-stage spray water absorption method or single-stage spray plus alkali absorption method generally adopted has the main disadvantages of low technical level, low purification efficiency, poor purification effect, and substand...

AI Technical Summary

Problems solved by technology

However, the single-stage spraying water absorption method or single-stage spraying and alkali absorption method generally used has the main disadvantages of low technical level, low purification efficiency, poor purification effect, and substandard waste gas treatment.

Images