一、沸石简介

　　1、 Introduction to Zeolite

　　沸石是一种多微孔硅酸盐或硅铝酸盐晶体，其内部由硅氧四面体或氧铝四面体通过氧桥键相连，形成了尺寸大小均匀（通常为0.3~2nm）的孔道和空腔体系。基于这一独特的微观结构，沸石能够依靠物理吸附（范德华力），将直径小于其孔径的分子吸附在孔腔内部。在工业应用中，为了最大化吸附效率，通常将分子筛材料均匀涂覆在蜂窝状载体上，制成圆盘状或滚筒状的设备，即我们熟知的“沸石转轮”或“沸石转筒”，以增加与废气的接触比表面积，提升吸附能力。

　　Zeolite is a type of microporous silicate or aluminosilicate crystal, which is connected internally by silicon oxygen tetrahedra or oxygen aluminum tetrahedra through oxygen bridge bonds, forming uniformly sized (usually 0.3-2nm) pore and cavity systems. Based on this unique microstructure, zeolites can rely on physical adsorption (van der Waals force) to adsorb molecules with diameters smaller than their pore size inside the pore cavity. In industrial applications, in order to maximize adsorption efficiency, molecular sieve materials are usually uniformly coated on honeycomb carriers and made into disc-shaped or drum shaped devices, commonly known as "zeolite rotors" or "zeolite drums", to increase the contact surface area with exhaust gas and enhance adsorption capacity.

　　二、沸石转轮浓缩工艺详解

　　2、 Detailed explanation of zeolite rotary wheel concentration process

　　沸石转轮是沸石吸附技术的核心应用形式，它通过连续运转实现对低浓度、大风量有机废气（VOCs）的高效吸附和浓缩。其工作原理主要分为吸附、脱附和冷却再生三个连续的阶段。沸石转轮工作原理示意图·净化排放：含有VOCs的废气经过滤等预处理后，进入转轮的吸附区（S1）。当废气通过沸石介质时，VOCs分子被吸附，净化后的洁净气体达标排放。·高温脱附：吸附饱和的沸石区域随着转轮的转动，进入脱附区（S2）。在此区域，一股高温热风（通常为180℃左右）反向吹扫沸石，使其吸附的VOCs分子脱离出来，形成一股高浓度、小风量的浓缩废气。·冷却再生：完成高温脱附的沸石区域进入冷却再生区（S3），由常温或微负压的空气进行冷却，使其恢复吸附能力，为下一个吸附循环做准备。用于冷却的空气经加热后可作为再生空气使用，从而降低能耗。

　　Zeolite impeller is the core application form of zeolite adsorption technology, which achieves efficient adsorption and concentration of low concentration and high air volume organic waste gases (VOCs) through continuous operation. Its working principle is mainly divided into three continuous stages: adsorption, desorption, and cooling regeneration. Schematic diagram of the working principle of zeolite impeller · Purification emissions: After pre-treatment such as filtration, the exhaust gas containing VOCs enters the adsorption zone (S1) of the impeller. When the exhaust gas passes through the zeolite medium, VOCs molecules are adsorbed, and the purified clean gas meets the emission standards. ·High temperature desorption: The adsorption saturated zeolite region enters the desorption zone (S2) as the rotor rotates. In this area, a high-temperature hot air (usually around 180 ℃) blows the zeolite in reverse, causing the adsorbed VOCs molecules to detach and form a concentrated exhaust gas with high concentration and low air volume. ·Cooling regeneration: The zeolite region that has completed high-temperature desorption enters the cooling regeneration zone (S3) and is cooled by air at room temperature or slightly negative pressure to restore its adsorption capacity, preparing for the next adsorption cycle. The air used for cooling can be used as regeneration air after heating, thereby reducing energy consumption.

　　三、适用范围与应用行业

　　3、 Scope of application and application industry

　　适用范围：该工艺特别适用于处理低浓度、大风量的有机废气净化，能有效将污染物富集，为后续处理单元减负增效。应用行业：家具喷涂、汽车喷涂、集装箱喷涂、船体喷涂、钢结构喷涂、漆包线生产、印刷行业等。适用的VOCs：苯、甲苯、二甲苯、乙醇、异丙醇、丁醇、MEK（甲乙酮）、MIBK（甲基异丁基酮）、丙酮、环己酮、NMP（N-甲基吡咯烷酮）、乙酸乙酯、乙酸丙酯、乙酸丁酯等。后端配套工艺：可根据组分特性和回收价值，灵活适配多种后端处理装置，如：直接燃烧装置（TO）、催化燃烧装置（CO/RCO）、蓄热燃烧装置（RTO）、冷凝回收或溶剂回收装置等。

　　Scope of application: This process is particularly suitable for purifying organic waste gas with low concentration and high air volume, which can effectively enrich pollutants and reduce the burden and increase efficiency of subsequent treatment units. Application industries: furniture spraying, automotive spraying, container spraying, ship hull spraying, steel structure spraying, enameled wire production, printing industry, etc. Applicable VOCs: benzene, toluene, xylene, ethanol, isopropanol, butanol, MEK (methyl ethyl ketone), MIBK (methyl isobutyl ketone), acetone, cyclohexanone, NMP (N-methylpyrrolidone), ethyl acetate, propyl acetate, butyl acetate, etc. Backend supporting process: It can flexibly adapt to various backend processing devices based on component characteristics and recycling value, such as direct combustion device (TO), catalytic combustion device (CO/RCO), thermal storage combustion device (RTO), condensation recovery or solvent recovery device, etc.

　　四、工艺性能

　　4、 Process performance

　　参考以下为沸石转轮在处理不同VOCs组分时的性能数据参考，展示了其优异的净化效率和浓缩能力。

　　The following is a reference for the performance data of zeolite rotors in treating different VOCs components, demonstrating their excellent purification efficiency and concentration ability.

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