Nitrous Oxide Treatment Device
1. Material Overview
Nitrous oxide (also known as laughing gas) is a hazardous chemical with the chemical formula N₂O. At room temperature, nitrous oxide is a colorless, non-flammable gas with a slightly sweet odor. It has a mild anesthetic effect and can induce laughter. At high temperatures, nitrous oxide is a strong oxidizing agent similar to oxygen. Nitrous oxide has important medical applications; it possesses anesthetic and analgesic effects and is widely used as an anesthetic in surgery and dentistry.
2.Process Introduction
This project adopts a scheme where the exhaust gas from the adipic acid plant is first diluted with air to reduce the concentration of N2O to around 9 vol%, followed by catalytic decomposition of N2O, denitration, and waste heat recovery.
The system of this project mainly includes: concentration detection and gas-liquid separation, dilution process, heat exchange and N2O decomposition reaction, denitration reaction, and heat recovery process. The exhaust gas containing N2O from the adipic acid nitrous acid absorption section undergoes decomposition reaction in this exhaust gas treatment unit, becoming N2 and O2 that are vented into the atmosphere. At the same time, the heat generated during the emission reduction reaction process is recovered and utilized, and the steam produced is sent to the steam pipe network.
3. Technical Advantages
The low-temperature catalytic decomposition technology of N2O is an advanced technology for reducing the emission of NOx components in industrial exhaust gases. It is a globally leading new-generation NOx treatment technology that is vigorously developed by various countries.
1) Compared to similar NO treatment technologies, this technology employs a low-temperature catalytic decomposition process, with a decomposition catalyst activation temperature of 400°C. A low-temperature steel reactor can be used.
2) This technology utilizes a full set of domestically produced catalysts, which exhibit high efficiency and activity. After undergoing low-temperature decomposition and coupled catalytic denitrification, the N2O emission reduction efficiency can reach over 99%.
3) Due to the adoption of low-temperature catalytic decomposition technology, the reaction temperature can be significantly reduced, significantly reducing the replacement costs of high-temperature reactors and refractory materials. At the same time, the catalytic decomposition reaction does not require the addition of reducing agents, and utilizes the heat of decomposition reaction to sustain the reaction process, greatly reducing operating costs.
4) Compared with imported catalysts, domestic catalysts are priced lower, resulting in lower unit operating costs for emission reduction devices.
5) Compared with imported reactor designs, the reactor of this technology, through reasonable design, occupies a smaller area, effectively saving construction land.
6) Due to the full localization of patented equipment, the shortcomings of high prices and long procurement cycles associated with imported equipment have been overcome, significantly reducing the investment required for the construction of emission reduction device projects and shortening the construction period of such devices.
7) This technology does not produce CO2 emissions, nor does it increase new NOx, thus eliminating the issue of secondary pollution..
4. Technical Benefit
1) With emission reduction efficiency of over 99%, it can stably meet stringent environmental emission standards, completely avoiding environmental penalties and production suspension risks. It produces no secondary pollution and does not increase carbon emissions, aligning with the green development policy direction. It helps enterprises establish a responsible market image in environmental protection, enhancing policy adaptability and downstream cooperation recognition.
2) The full set of domestically produced equipment and catalysts significantly reduces project construction investment. The short procurement cycle and construction period accelerate the time to production and return on investment, reducing capital occupation costs. The low-temperature process eliminates the high replacement expenses of high-temperature equipment and refractory materials, requires no additional reducing agents, and maintains the heat of reaction internally. Coupled with the price advantage of domestically produced catalysts, the long-term operating costs are significantly lower than similar technologies. The compact reactor design saves construction land, further reducing site acquisition and layout costs.
3) The supply of domestically produced equipment is guaranteed to be sufficient, avoiding procurement premiums and after-sales barriers associated with imported equipment, and ensuring more timely after-sales response. The low-temperature steel reactor structure is reliable, the catalyst is efficient and stable, and the operation and maintenance process is simple, reducing unplanned downtime and maintenance costs. The design, which occupies a small area, is adaptable to different site conditions, allowing flexible implementation whether it's for new projects or the renovation of existing production lines, thus ensuring better long-term operational stability and adaptability to working conditions..