化燃烧是典型的气-固相催化反应，其实质是活性氧参与的深度氧化作用。在催化燃烧过程中，催化剂的作用是降低活化能，同时催化剂表---有吸附作用，使反应物分子富集于表面提高了反应速率，加快了反应的进行。借助催化剂可使有机废气在较低的起燃温度条件下，发生无焰燃烧，并氧化分解为co2和h2o，同时放出大量热能。在空速较高，温度较低的条件下，有机废气的燃烧反应转化率接近100%，表明该催化剂的活性较高。
Chemical combustion is a typical gas-solid catalytic reaction, the essence of which is the deep oxidation of active oxygen. In the process of catalytic combustion, the role of catalyst is to reduce the activation energy, at the same time, there is adsorption on the surface of catalyst, which makes the reactant molecules enrich on the surface, improves the reaction rate and speeds up the reaction. With the help of catalyst, the organic waste gas can be burned without flame at a lower ignition temperature, and then oxidized and decomposed into CO 2 and H 2O, and a large amount of heat energy can be released at the same time. Under the conditions of high space velocity and low temperature, the conversion of organic waste gas combustion is close to 100%, which indicates that the catalyst has high activity.
催化剂的活性分诱导活化、稳定、衰老失活3个阶段，有一定的使用限期，工业上实用催化剂的寿命一般在2年以上。使用期的长短与---活性结构的稳定性有关，而稳定性取决于耐热、抗毒的能力。对催化燃烧所用催化剂则要求具有较高的耐热和抗毒的性能。有机废气的催化燃烧一般不会在很严格的操作条件下进行，这是由于废气的浓度、流量、成分等往往不稳定，因此要求催化剂具有较宽的操作条件适应性。催化燃烧工艺的操作空速较大，气流对催化剂的冲击力较强，同时由于床层温度会升降，造成热胀冷缩，易使催化剂载体破裂，因而催化剂要具有较大的机械强度和良好的抗热胀冷缩性能。
The activity of the catalyst can be divided into three stages: induced activation, stabilization, aging and deactivation. It has a certain service life. The service life of the industrial catalyst is generally more than 2 years. The length of service life is related to the stability of the active structure, and the stability depends on the ability of heat and toxin resistance. The catalyst used in catalytic combustion is required to have high heat resistance and anti-toxic performance. The catalytic combustion of organic waste gas is generally not carried out under very strict operating conditions, because the concentration, flow rate and composition of waste gas are often unstable, so the catalyst is required to have a wide range of operating conditions. The operating space velocity of catalytic combustion process is large, and the impact of gas flow on catalyst is strong. At the same time, the bed temperature will rise and fall, which will cause thermal expansion and cold contraction, and easily cause the catalyst carrier to rupture. Therefore, the catalyst should have greater mechanical strength and good anti thermal expansion and cold contraction performance.

有机废气是石油化工、轻工、塑料、印刷、涂料等行业排放的常见污染物，有机废气中常含有烃类化合物(芳烃、烷烃、烯烃)、含氧有机化合物(醇、酮、有机酸等)、含氮、硫、卤素及含磷有机化合物等。如对这些废气不加处理，直接排入大气将会对环境造成---污染，危害人体健康。传统的有机废气净化方法包括吸附法、冷凝法和直接燃烧法等，这些方法常有易产生二次污染、能耗大、易受有机废气浓度和温度---等缺点。而新兴的催化燃烧技术已由实验阶段走向工程实践，并逐渐应用于石油化工、农药、印刷、涂料、电线加工等行业。
Organic waste gas is a common pollutant discharged from petrochemical, light industry, plastics, printing, coating and other industries. Organic waste gas often contains hydrocarbons (aromatics, alkanes, olefins), oxygenated organic compounds (alcohols, ketones, organic acids, etc.), nitrogen, sulfur, halogen and phosphorus containing organic compounds, etc. If these waste gases are not treated and directly discharged into the atmosphere, it will cause pollution to the environment and harm human health. Traditional purification methods of organic waste gas include adsorption method, condensation method and direct combustion method. These methods often have some disadvantages, such as easy to produce secondary pollution, high energy consumption, easy to be affected by the concentration and temperature of organic waste gas. The new catalytic combustion technology has been applied in petrochemical, pesticide, printing, coating, wire processing and other industries.
催化燃烧几乎可以处理所有的烃类有机废气及恶臭气体，即它适用于浓度范围广、成分复杂的各种有机废气处理。对于有机化工、涂料、绝缘材料等行业排放的低浓度、多成分，又没有回收价值的废气，采用吸附-催化燃烧法的处理效果更好。用催化燃烧法处理有机废气的净化率一般都在95%以上，终产物为无害的co2和h2o(杂原子有机化合物还有其他燃烧产物)，因此无二次污染问题。此外，由于温度低，能大量减少nox的生成。催化燃烧的经济性 影响催化燃烧法经济效益的主要因素有：催化剂性能和成本；废气处理中的有机物浓度；热量回收效率；经营管理和操作水平。催化燃烧虽然不能回收有用的产品，但可以回收利用催化燃烧的反应热，节省能源，降低处理成本，在经济上是合理可行的。
Catalytic combustion can treat almost all hydrocarbon organic waste gas and odor gas, that is, it is suitable for the treatment of various organic waste gas with wide concentration range and complex composition. For the waste gas with low concentration, multi-component and no recycling value from organic chemical industry, coatings, insulating materials and other industries, the treatment effect of adsorption catalytic combustion method is better. The purification rate of organic waste gas treated by catalytic combustion method is generally more than 95%, and the final products are harmless CO2 and H2O (heteroatom organic compounds and other combustion products), so there is no secondary pollution problem. In addition, due to the low temperature, the formation of NOx can be greatly reduced. The main factors that affect the economic benefits of catalytic combustion are: catalyst performance and cost; concentration of organic matter in waste gas treatment; heat recovery efficiency; management and operation level. Although catalytic combustion can not recover useful products, it can recycle reaction heat of catalytic combustion, save energy and reduce treatment cost, which is reasonable and feasible in economy.
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