Technical features and advantages of the Napotec zeolite rotor + thermal oxidation process [Original]

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1. Technical features of the zeolite rotor + thermal oxidation process

The zeolite rotor technology belongs to the high-end equipment field. Based on the previous research and application, the rotor concentration adsorption is adopted, combined with the regenerative catalytic combustion technology, to control the pollution of large air volume and low-concentration organic waste gas. The overall process design principle is based on efficient adsorption and low-temperature catalytic oxidation, relying on the adsorption concentrated zeolite rotor and regenerative catalytic oxidation device respectively.

Firstly, the adsorption concentrated zeolite rotor is the core equipment of the overall technology. This technology equipment uses zeolite rotors, which have the following remarkable characteristics:

1. High performance and high efficiency: Using hydrophobic molecular sieves with excellent adsorption performance as the adsorbent, it can provide sufficient performance support for a wide range of VOC types and different operating conditions.

2. Treatment of high boiling point solvents: Using hydrophobic zeolite molecular sieves, the non-flammable and high-heat-resistant characteristics can enable regeneration under high-temperature conditions.

3. Inertness: Even for VOCs with high thermal polymerization, such as styrene and cyclohexanone, hydrophobic molecular sieves can be used for efficient treatment.

4. Cleaning and activation: The zeolite rotor is formed by sintering at high temperatures, and it is an entirely inorganic combination. If the honeycomb pathways are blocked, water washing can be performed.

5. Stability: During the operation of the rotating adsorption rotor, the adsorption and desorption processes are continuously carried out. The concentration of the desorbed concentrated waste gas fluctuates little, avoiding the concentration fluctuations formed during the desorption of fixed adsorption beds, which is conducive to the stable and safe operation of the entire system and ensuring the stability of the heat output of the subsequent treatment units.

Secondly, the regenerative catalytic combustion technology used in this technology also has outstanding characteristics:

1. Stable catalytic bed temperature: A heat storage ceramic layer is set in the catalytic bed to reduce the temperature fluctuations in the combustion chamber caused by changes in the heater and reactant concentration, improving the activity and stability of the catalyst, extending the service life of the catalyst, reducing the amount of catalyst used; energy conservation and consumption reduction, improving the treatment effect of organic waste gas.

2. Energy recovery technology: The reaction tail gas and the incoming raw gas for reaction are heated and the temperature is relatively low, which is a typical low-grade heat source. It is proposed to use new efficient heat exchange devices such as honeycomb-shaped full-effect heat exchangers to improve the level of residual heat utilization, further optimize the structure design of the CO system, and achieve standardized and modular design.

2. Technical advantages of the zeolite rotor + thermal oxidation process

This technology is suitable for continuous operation scenarios. The rotating adsorption structure has stable rotation speed, consistent adsorption and desorption air velocities, and operates continuously. There is no flow deviation phenomenon, and the desorption concentration is stable, with high purification efficiency. Compared with other domestic technologies, this technology has the following advantages:

① Using the modularized ceramic fiber paper-based zeolite honeycomb rotor adsorption concentration - rotating regenerative catalytic combustion coupling treatment technology, for large air volume and low-concentration organic waste gas, it first undergoes zeolite adsorption enrichment, and then desorption is carried out by hot air on the zeolite adsorbent, forming a small air volume and high-concentration organic waste gas. It solves the forming technology of ceramic fiber paper-based zeolite honeycomb rotors.

② Compared with direct catalytic combustion and thermal oxidation treatment technologies, this technology can save more than 60% of operating costs; it can make the reaction temperature more stable, and the catalyst service life is significantly improved. Compared with the adsorption process using activated carbon materials, this technology has higher VOCs treatment efficiency (＞90%), good fire resistance, and the loading amount of zeolite can reach more than 40% by loading different surface properties and pore structure of zeolite.

③ Through processes such as forming with ceramic fiber corrugated sheets, impregnation with silica sol, drying, sintering, impregnation with zeolite, and activation, a zeolite honeycomb rotor for industrial VOCs treatment is prepared, addressing the current atmospheric environmental pollution problems caused by VOCs.

④ The adsorption, concentration and oxidation technology of the zeolite honeycomb rotor not only has an efficient VOCs removal effect and meets environmental protection emission requirements, but also recovers and utilizes the reaction heat through heat storage and heat exchange technologies, featuring outstanding energy-saving characteristics. It has broad market prospects and promotion value in the fields of large-volume, low-concentration industrial organic waste gas treatment in industries such as chemical engineering, spraying, chemical fibers, pharmaceuticals, automotive and shipbuilding.