Treating fluid for treating nitric oxide in waste gas

Abstract

The invention relates to a treating fluid for treating nitric oxide in a waste gas, wherein the treating fluid is prepared from a reactant, a complexing catalyst and desalted water; the reactant is selected from one of ammonium hydroxide or urea or a combination of two; the complexing catalyst is formed by preparing a complexing agent or transition metal salt, wherein the complexing agent is selected from one out of or the combination of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine or polyethyleneimine; the transition metal salt is selected from one out of or the combination of cobalt-nitrate hexahydrate (II) or cobalt chloride hexahydrate (II); the concentration of the reactant in the treating fluid is 1-20%(w%); the concentration of the complexing catalyst in the treating fluid is 1-100mmol / L. The treating fluid for treating nitric oxide in waste gas as well as the treating method which are provided by the invention are high in treating efficiency, discharge no waste fluid, and cannot generate secondary pollution; the treating method is a low-input, environment-friendly and efficient nitric oxide treating technique, and has wide popularization and application values.

Description

technical field [0001] The invention relates to a treatment liquid for treating nitrogen oxides in exhaust gas, in particular to the problem of small-scale and unitized nitrogen oxide waste gas treatment, that is, the treatment liquid for nitrogen oxides in waste gas of production units whose daily waste gas output does not exceed 500kg . Background technique [0002] The NOx in industrial waste gas is mainly nitrogen dioxide and nitric oxide, manifested as brown-yellow smog, commonly known as Huanglong, which will form nitric acid rain after being dissolved in water. Acid rain will bring extensive harm to the environment and cause huge economic losses. , such as: corroding buildings and industrial equipment; destroying open-air cultural relics and historic sites; damaging plant leaves, leading to forest demise; killing fish and shrimp in lakes; destroying soil components, reducing crop production or even death; Harmful to the human body. [0003] In addition, when NOx is ...

AI Technical Summary

Problems solved by technology

Due to the need to cool below 15°C, not only the process is complicated, but also the input and energy consumption will be greatly increased

[0011] Jinling Chemical Industry patent CN103331091A is a process for absorbing nitrogen oxides. It proposes to use dilute nitric acid plus urea to absorb part of nitrogen dioxide, and then use sodium hydroxide to absorb the mixed gas of nitrogen dioxide and nitric oxide. The exhaust gas treatment of more than 100% nitrogen dioxide may be effective, while others are difficult to meet the standard treatment

Moreover, a large amount of urea waste liquid and caustic soda waste liquid will be produced, which will inevitably cause serious secondary pollution problems