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What is a nitrogen oxide scrubber?

Views:25     Author:China XiCheng     Publish Time: 2021-07-02      Origin:China XiCheng

NOx is a type of pollutant. It is a binary compound of nitrogen and oxygen. It is usually produced in non-combustion processes such as metal refining, pickling or electroplating baths, and nitric acid operations. The most common industrial harmful NOx fumes that require washing are nitric oxide (N2O), nitrogen dioxide (NO2), and nitrous oxide (NO). The NOx scrubber system is designed to wash any NOx fumes, colorless and colored (brown/orange) plumes, and eliminate any hydrogen sulfide (H2S) odor.


An efficient wet scrubber is needed to prepare NOx fumes emitted into the atmosphere. Mech-Chem has designed and installed many wet scrubbers for customers from all walks of life. These scrubbers are economical, reliable, and require little maintenance. This type of wet scrubber or NOx scrubber uses a single reservoir with a packed bed. The caustic is sprayed into the stream of NOx fumes together with a strong reducing agent. This process breaks down the NOx gas and allows the treated odorless steam to be discharged into the atmosphere.

An efficient wet scrubber is needed to prepare NOx fumes emitted into the atmosphere. Mech-Chem has designed and installed many wet scrubbers for customers from all walks of life. These scrubbers are economical, reliable, and require little maintenance. This type of wet scrubber or NOx scrubber uses a single reservoir with a packed bed. The caustic is sprayed into the stream of NOx fumes together with a strong reducing agent. This process breaks down the NOx gas and allows the treated odorless steam to be discharged into the atmosphere.


If the exhaust gas concentration is very high, two wet scrubbers can be used in series. If the exhaust gas has peculiar smell, you can also add a PP activated carbon adsorption tower.

PP wet scrubber processing workshop


The syrup in the PP wet scrubber needs to be added in time, and the PH value is about 7-9. If conditions permit, an automatic dosing system can be added. It is recommended that the fan choose to be exhausted, so that the bearing of the fan is isolated from the corrosive exhaust gas and is not easy to be corroded.


PP NOx Scrubber performance characteristics


1. Physical properties: PP NOx Scrubber is particularly stable to water, and its water absorption rate is only 0.01% in water for 14 hours. The molecular weight is between 80,000 and 150,000, and the moldability is good.


2. Mechanical properties: PP NOx Scrubber has high crystallinity and regular structure, so it has excellent mechanical properties. Its strength, hardness and elasticity are higher than high-density PE (HDPE). The outstanding feature is the resistance to bending fatigue (7×10^7) times of opening and closing bending without damage, and the coefficient of dry friction is similar to that of nylon.


3. Thermal performance: PP NOx Scrubber has good heat resistance, the melting point is 164~170℃, and the products can be sterilized at temperatures above 100℃. It will not deform at 150°C under the influence of external force. The embrittlement is -35℃, and embrittlement will occur below -35℃, and the heat resistance is not as good as PE.


4. Chemical stability: PP NOx Scrubber has good chemical stability. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to other chemical reagents, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons, etc. can make PP Softening and swelling, the chemical stability is improved with the increase of crystallinity. Therefore, PP is suitable for making pipes and fittings, and has a good anti-corrosion effect.


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